Display device

display device {DISPLAY DEVICE}

The present invention relates to a display device.

With the development of various portable electronic devices such as mobile communication terminals and notebook computers, a demand for a display device applicable thereto is increasing.

Examples of the display device include a liquid crystal display device, a plasma display device, a field emission display device, a light emitting diode display device, and an organic light emitting display device. (organic light emitting display device) and the like are being studied.

Among these display devices, a liquid crystal display includes an array substrate including thin film transistors, an upper substrate including a color filter and/or a black matrix, and a liquid crystal layer formed between the two substrates, and includes both electrodes of a pixel region. The arrangement of the liquid crystal layers is adjusted according to the electric field applied therebetween, and the transmittance of light is adjusted accordingly to display an image.

In addition, an organic light emitting diode display, which has recently been in the spotlight as a display device, has advantages in that a response speed is fast and luminous efficiency, luminance, and viewing angle are large by using an organic light emitting device that emits light by itself.

On the other hand, there is a set device of the concept of a finished product including such a display device, and examples of such a set device may include a television, a computer monitor, a billboard, and the like. Such a display device or a set device includes a sound generating device such as a speaker for outputting a sound related to a displayed image.

In general, a manufacturer of a display device such as a liquid crystal display device or an organic light emitting diode display device produces only a display panel or a display device, and a separate company that produces speakers assembles the finished speaker to the display device to finally display the image. and a set device outputting sound.

1 is a schematic plan view of a speaker included in a conventional display device.

As shown in FIG. 1 , in the conventional display device 1 (or set device), the speaker 2 is provided at the rear or lower end of the display panel.

In this case, since the sound generated through the speaker 2 proceeds toward the rear or the lower side of the display panel, not the front of the display panel on which the image is displayed, the sound progresses toward the viewer viewing the image from the front of the display device 1 . There was a problem that it interfered with the immersion of the viewers by not doing it.

In addition, when the sound generated through the speaker 2 travels toward the rear side of the display panel or the lower side of the display panel, there is a problem in that the sound quality is deteriorated due to interference with the sound reflected from the wall or the floor.

In addition, in the speaker included in the conventional display device, the propagation direction of the generated sound is directed to the side other than the direction of the viewer of the display device, and thus the localization of the sound is reduced according to the diffraction phenomenon of the sound, as well as a set device such as a television. Since the speaker occupies a certain space in composing the set device, there is also a problem that there is a certain constraint on the design and space arrangement of the set device.

Accordingly, there is an increasing need for a technology capable of improving the sound quality output from the display device and not interfering with the viewer's immersion.

<p>An object of the present disclosure is to provide a display device in which sound quality is improved and a viewer's sense of immersion can be increased.</p>

<p>In order to achieve the above technical problem, a display device according to the present disclosure is provided between a display panel displaying an image, a rear support structure covering the rear surface of the display panel, and the display panel and the rear support structure, and includes a central region of the display panel and The partition may include a partition dividing the left region and the right region, and a sound generating device disposed in each of the central region, the left region, and the right region of the display panel, fixed to the rear support structure, and vibrating the display panel in the corresponding region.</p><p>The sound generating apparatus according to an example may have a 2.1 channel type sound output characteristic.</p><p>The display device according to the present disclosure may further include a metal plate disposed between the rear surface of the display panel and the sound generating device in a central region of the display panel. Here, the metal plate may include at least one perforated exhaust hole.</p><p>The display device according to the present disclosure further includes a heat dissipation member attached to a rear surface of the display panel so as to cover a central region, a left region, and a right region of the display panel, wherein the display panel is disposed on the thin film transistor array substrate and the thin film transistor array substrate a pixel array unit provided on the , and an opposing substrate covering the pixel array unit, wherein the heat dissipation member may be attached to the rear surface of the opposing substrate through an adhesive layer. Here, the heat dissipation member may include a plurality of exhaust holes.</p><p>In the display device according to the present disclosure, the display panel includes a thin film transistor array substrate, a pixel array unit provided on the thin film transistor array substrate, and an opposing substrate covering the pixel array unit, wherein the opposing substrate includes a moisture barrier layer made of a metallic material, and It has a heat dissipation layer made of a thermally conductive material and laminated on the moisture permeation barrier layer, and the sound generating device may vibrate the display panel through the heat dissipation layer in a corresponding area.</p>

<p>The display device of the present disclosure includes a sound generating device that generates a sound by vibrating the display panel, so that the sound can be output to the front surface of the display panel, so that the sound quality can be improved and the viewer's immersion may not be disturbed.</p><p>In addition, the display device of the present disclosure may have an excellent acoustic characteristic in a wide sound range by disposing the low-pitched sound actuator in the central region of the display panel and the mid-high-pitched sound actuator in the left region and the right region of the central region, respectively.</p><p>In addition, the display device of the present disclosure includes a central region, a left region, and a partition disposed in each of the left and right regions so that the display panel is divided into a central region, a left region, and a central region, so that a reflected wave or a standing wave that may occur in each region of the display panel Deterioration of sound quality characteristics can be prevented.</p><p>In addition, in the display device of the present disclosure, since the heat dissipation member is formed on the display panel, image quality deterioration generated in the display panel due to heat generated by driving of the actuator may be prevented.</p><p>In addition to the effects of the present disclosure mentioned above, other features and advantages of the present disclosure will be described below or will be clearly understood by those skilled in the art from such description and description.</p>

1 is a schematic plan view of a speaker included in a conventional display device. FIG. 2A is a rear view of a display device according to an example of the present disclosure, and FIG. 2B is a cross-sectional view taken along line II of FIG. 2A . 3A is a cross-sectional view for explaining an actuator of an example according to the present disclosure, and FIG. 3B is a cross-sectional view for explaining another example of an actuator according to the present disclosure. 4A and 4B are diagrams for explaining a sound generating method of a display device according to the present disclosure. 5A and 5B are views for explaining a coupling structure between a rear support structure and an actuator according to an example in the display device according to the present disclosure; 6A and 6B are views for explaining a coupling structure between a rear support structure and an actuator according to another example in the display device according to the present disclosure. 7A, 7B, and 7C are diagrams for explaining a third partition of a partition in the display device according to the present disclosure. 8A is a diagram of a display device according to a comparative example, and FIG. 8B is a graph illustrating sound generation characteristics of the display device according to the comparative example and the display device according to the present disclosure. 9 is a view for explaining a phenomenon of weakening of acoustic characteristics due to a reflected sound wave reflected from a partition in the display device according to the present disclosure; 10A and 10B are diagrams for explaining a structure of a partition according to an example in a display device according to another example of the present disclosure; 11A and 11B are diagrams for explaining a structure of a partition according to another example in a display device according to another example of the present disclosure; 12A, 12B, and 12C are diagrams for explaining the structure of the first and second partitions in the display device according to the present disclosure. 13A and 13B are diagrams for explaining a partition according to another example in the display device according to the present disclosure. 14A is a rear view of a display device according to another example of the present disclosure, and FIG. 14B is a cross-sectional view taken along line II-II of FIG. 14A . 15 is a view for explaining a coupling structure between the display panel and the metal plate and the coupling structure between the actuator and the metal plate shown in FIGS. 14A and 14B . 16A and 16B are views for explaining a metal plate according to another example of the present disclosure. 17 and 18 are diagrams for explaining a display panel and a heat dissipation member in a display device according to another example of the present disclosure. 19 is a view for explaining a modified example of the heat dissipation member shown in FIG. 18 .

Hereinafter, examples of the present disclosure will be described in detail with reference to exemplary drawings. In adding reference numerals to components of each drawing, the same components may have the same reference numerals as much as possible even though they are indicated in different drawings. In addition, in describing an example of the present disclosure, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the example of the disclosure, the detailed description may be omitted.

Also, in describing the components of the examples of the present disclosure, terms such as first, second, third, etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, order, or number of the elements are not limited by the terms. When a component is described as being "connected", "coupled" or "adhesive" to another component, the component may be directly connected or connected to the other component, but other components may be interposed between each component. It will be understood that each component may be "interposed" or "connected," "coupled," or "adhesive" through another component.

FIG. 2A is a rear view of a display device according to an example of the present disclosure, and FIG. 2B is a cross-sectional view taken along line II of FIG. 2A .

2A and 2B , a display device according to an example of the present disclosure includes a display panel 100 , a sound generating device 200 , and a partition 600 .

The display panel 100 displays an image, and includes a front surface 100a on which an image is displayed and a rear surface 100b opposite to the front surface 100a. The display panel 100 may include at least two regions spatially partitioned to be parallel to each other.

The display panel 100 according to an example includes a central area CA, a left area LA provided to the left of the center area CA, and a right area RA provided to the right of the center area CA. Here, the left area LA and the right area RA may be provided symmetrically with respect to the central area CA or may be provided asymmetrically.

The sound generating device 200 directly vibrates the display panel 100 by contacting one surface, ie, the rear surface 100b, of the display panel 100 to generate sound. That is, the sound generating device 200 is disposed in the areas CA, LA, and RA provided on the display panel 100 , and directly touches the rear surface 100b of the display panel 100 in the corresponding areas CA, LA, and RA. The display panel 100 vibrates by flowing to generate a sound. In this case, the display panel 100 vibrates in the front 100a direction and the rear 100b direction according to the driving of the sound generating device 200 while displaying an image, and serves as a diaphragm to output the sound to the front of the display device. .

The sound generating device 200 according to an example is a speaker, and may be a sound actuator or a sound exciter, but is limited thereto and may be a sound device that outputs a sound according to an electrical signal. have. The sound generating apparatus 200 may include at least two actuators disposed in at least two areas provided on the display panel 100 .

The sound generating apparatus 200 according to an example includes a first actuator 210 (or a central actuator) disposed in the central area CA (or first area) of the display panel 100 , and a left side of the central area CA. The second actuator 230 (or the left actuator) disposed in the area LA (or the second area) and the third actuator 250 disposed in the right area RA (or the third area) of the central area CA ) (or right actuator).

The first actuator 210 may directly vibrate the central area CA of the display panel 100 to generate a low-pitched sound. The second actuator 230 directly vibrates the left area LA of the display panel 100 to generate a sound in a high and mid-range range. The third actuator 250 directly vibrates the right area RA of the display panel 100 to generate a sound in a high and mid-range range together with the second actuator 230 . Optionally, the first to third actuators 210 , 230 , and 250 produce different sound ranges or sounds of the same range according to the taste (or setting mode) of a viewer viewing the image displayed on the display device 100 . may cause

The partition 600 spatially separates the areas CA, LA, and RA provided in the display panel 100 , and prevents interference between sounds generated in the respective areas CA, LA, and RA. The partition 600 according to an example includes a first partition 610 disposed between the center area CA and the left area LA, and a second partition disposed between the center area CA and the right area RA. (630).

The first and second partitions 610 and 630 may be members for separating the low-pitched sound generated in the center area CA from the high-mid range sound generated in the left and right areas LA and RA.

Since the first and second partitions 610 and 630 have the same structure while being arranged in a left-right symmetrical structure with respect to the central area CA, in the following description, the center area CA and the left area LA are defined. The first partition 610 to be divided will be described as representative, and the configuration of the first partition 610 may be equally applied to the second partition 630 .

The first partition 610 extends in the vertical direction Y of the display panel 100 , and includes the display panel 100 and a cover bottom 300 which is a rear support structure covering the rear surface of the display panel 100 . It may be a structure disposed in between. The first partition 610 separates the mid-range sound generated by the second actuator 230 from the low-pitched sound generated by the first actuator 210, thereby preventing deterioration of acoustic characteristics due to interference between the two sounds. have. The first partition 610 may be formed of a partition member such as a foam pad or one-sided/double-sided tape, and is adhered to at least the upper surface 300a of the cover bottom 300 , while the rear surface of the display panel 100 ( 100b) may be adhered to or contacted in a non-adhesive form.

In addition, the first partition 610 may be in contact with the rear surface 100b of the display panel 100 in a non-adhesive form in order to improve the low-pitched sound emission characteristics as well as the acoustic separation function between low-pitched and mid-high-pitched sounds, and the display panel Based on the thickness direction Z of 100 , the height (or thickness) of the first partition 610 is equal to or greater than the distance (or height) between the display panel 100 and the cover bottom 300 . can A detailed configuration of the first partition 610 will be described later.

4A and the like, each of the first to third actuators 210, 230, and 250 is disposed to surround a magnet, a plate supporting the magnet, a center pole protruding from the central region of the plate, and the center pole and a bobbin in which a coil to which a current for sound generation is applied is wound. In this case, based on the thickness direction Z of the actuators 210 , 230 , and 250 , the front end (or the upper end) of the bobbin is disposed to contact the rear surface 100b of the display panel 100 .

In addition, as shown in FIG. 2B , the display device may further include a rear support structure supporting at least one of the rear surface 100b and the side surface of the display panel 100 , and the plate of each actuator is attached to the rear support structure. can be fixed.

The rear support structure includes a cover bottom 300 disposed on the rear surface 100b of the display panel 100 , is coupled to the cover bottom 300 while enclosing the side surface of the display panel 100 , and is formed of the display panel 100 . A middle cabinet 500 for receiving and supporting one edge may be further included.

The cover bottom 300 constituting the rear support structure may be a plate-shaped member made of a metal material, a glass material, or a plastic material that extends over the entire rear surface of the display device.

Meanwhile, in the display device according to the present disclosure, the first actuator 210 directly vibrates the central area CA of the display panel 100 to generate low-pitched sound, and the second and third actuators 230 and 230 The 250 directly vibrates the left area LA and the right area RA of the display panel 100 to generate a sound in a high and mid-range range. Accordingly, in the display device according to the present disclosure, a so-called 2.1 channel type sound output is generated due to the woofer output generated from the first actuator 210 and left and right stereo sound output generated from the second and third actuators 230 and 250 . can have characteristics.

In the present disclosure, the low-pitched sound range may be defined as 200 Hz or less, the mid-range range may be defined as 200 Hz to 3 kHz, and the high-pitched sound range may be defined as 3 kHz or more, but the present disclosure is not limited thereto.

On the other hand, in the display device according to the present disclosure, the first method of setting the bass limit frequency f0 of the first actuator 210 to be lower than the bass limit frequencies of the second and third actuators 230 and 250, and the center At least one of the second methods in which the area of the area CA is relatively larger than that of the left area LA and the right area RA may be adopted. Here, the bass limit frequency f0 is a lower limit value among the reproduction frequency bands that can be reproduced by each actuator.

As described above, the display device according to the present disclosure has an effect that the low-pitched sound is greater than the high-mid-range sound, so that the low-pitched sound characteristics are improved. In particular, when the area of the central area CA provided in the display panel 100 is relatively larger than the area of the left and right areas LA and RA, the first to third actuators 210 , 230 , and 250 respectively output the same output. Even if it has characteristics, the area of the diaphragm of the bass is increased, so that the stable output of the bass is possible.

Hereinafter, the remaining components of the display device according to the present disclosure will be described in detail.

The display device according to an example of the present disclosure further includes a cover bottom 300 as a rear support structure, and the cover bottom 300 is coupled to the middle cabinet 500 and the like to provide a rear surface (or rear) of the display panel 100 . A function of supporting or covering the , and the sound generating device 600 may be fixed.

The cover bottom 300 is not limited to the term, but a plate bottom, a back cover, a base frame, a metal frame, a metal chassis, and a chassis. It may be used as a different expression such as a chassis base, an M-chassis, and the like, and may include any type of frame or plate-shaped structure disposed on the rear base of the display device as a support for supporting the display panel 100 .

In the present disclosure, the term "display device" refers to a liquid crystal display module including a display panel and a panel driver for driving the display panel, a display device in a narrow sense such as an organic light emitting display module, as well as a liquid crystal display module and an organic light emitting display module It is used as a concept including a set electronic device or even a set device such as a finished product including a display module such as a mobile electronic device, a home appliance, a vehicle display device, and the like. Here, the mobile electronic device may include a notebook computer, a smart phone, a tablet computer, an electronic pad, a wearable device, or a watch phone, and the home appliance includes a television, a computer monitor, or a refrigerator having a display module. In this case, the vehicle display device may include a navigation system or a vehicle control panel. That is, the display device in the present disclosure is used to include not only a narrow display device such as a liquid crystal display module and an organic light emitting display module, but also a set device that is an application product including the same.

However, in some cases, a liquid crystal display module and an organic light emitting display module composed of a display panel and a panel driving unit are expressed as a "display device" in a narrow sense, and electronic products including the liquid crystal display module and the organic light emitting display module A device may be distinguished and expressed as a "set device". For example, a narrow display device includes a display panel and a source printed circuit board that is a control unit for driving the same, and the set device is electrically connected to the source printed circuit board and is a set printed circuit that is a set control unit that controls the entire set device The concept may further include a substrate.

The display panel 100 according to the present disclosure may be any type of display panel such as a liquid crystal display panel, an organic light emitting display panel, a plasma display panel, a quantum dot light emitting display panel, a micro light emitting diode display panel, an electrophoretic display panel, etc. It is not limited to a specific display panel 100 as long as it can generate sound waves by being directly vibrated by the sound generating device 200 .

More specifically, a display panel including a liquid crystal display panel includes a plurality of pixels defined by a plurality of gate lines and a plurality of data lines and a lower substrate (or a thin film transistor array) including a thin film transistor for driving each pixel. substrate), an upper substrate (or color filter array substrate) including a color filter and/or a black matrix, and a liquid crystal layer provided between the lower substrate and the upper substrate to control light transmittance according to the driving of each pixel can be configured.

In addition, a display panel made of an organic light emitting display panel includes a plurality of pixels defined by a plurality of gate lines and a plurality of data lines, and a thin film transistor array substrate including a thin film transistor provided in each pixel to drive each pixel. , an organic light emitting device layer provided on the thin film transistor array substrate, and an encapsulation substrate covering the organic light emitting device layer. Here, the encapsulation substrate protects the thin film transistor and the organic light emitting device layer from external impact, and prevents moisture from penetrating into the organic light emitting device layer.

The display panel used in the display device according to the present disclosure is not limited in its shape, but an organic light emitting display panel may be more preferable for the following reasons.

Specifically, in the case of a liquid crystal display panel, since there are many stacked layers and an indirect light source type backlight in which a separate light source is disposed must be provided, when the liquid crystal material is directly vibrated by the sound generating device 200, the directionality of the liquid crystal material is shaken and accordingly Distortion of the image may occur.

In addition, since the organic light emitting device of the organic light emitting display panel corresponds to a self-luminous device and does not require a separate light source, several layers such as a glass layer, an encapsulation layer, and a polarization layer are laminated into one panel. Even if it is directly vibrated by (200), there is little influence on the light emitting characteristics of the organic light emitting element layer, so image distortion does not occur. Accordingly, the display panel 100 according to the present disclosure will be described using an organic light emitting display panel as an example.

In addition, the plasma display panel, the quantum dot light emitting display panel, the micro light emitting diode display panel, and the electrophoretic display panel may correspond to the self-light emitting device in the same way as the organic light emitting device of the organic light emitting display panel. Accordingly, the display panel 100 according to the present disclosure may be formed of a quantum dot light emitting display panel, a micro light emitting diode display panel, or an electrophoretic display panel instead of an organic light emitting display panel.

In addition, since the display panel used in the display device according to the present disclosure has a general structure, a more detailed description of the display panel will be omitted.

Additionally, the display device according to the present disclosure is disposed between the display panel 100 and the cover bottom 300 (or the middle cabinet 500 ), which is a rear support structure, and the display panel ( It further includes first to third air gaps AG1 , AG2 , AG3 providing a space for enabling vibration of 100 .

The first air gap AG1 is provided in the central area CA where the first actuator 210 is disposed, and is provided around the first actuator 210 . The second air gap AG2 is provided in the left area LA where the second actuator 230 is disposed, and is provided around the second actuator 230 . The third air gap AG3 is provided in the right area RA where the third actuator 250 is disposed, and is provided around the third actuator 250 . The first to third air gaps AG1 to AG3 may be spaces in which sound is generated when the display panel 110 is vibrated by the first to third actuators 210 , 230 , and 250 . . At this time, the first actuator 210 , the second actuator 230 , and the third actuator 250 are formed within the corresponding first air gap AG1 , the second air gap AG2 and the third air gap AG3 . Since they are arranged to have left-right and/or up-down symmetrical structures, stable output characteristics of low-pitched sound and stereo sound may be obtained, and durability and reliability of the display device may be improved.

Additionally, the partition 600 of the display device according to the present disclosure is a third partition 650 providing first to third air gaps AG1 , AG2 , and AG3 together with the first and second partitions 610 and 630 . ) may be further included.

The third partition 650 surrounds the central area CA, the left area LA, and the right area RA, respectively, so that the center area CA and the first and second partitions 610 and 630 are formed. An outer portion of each of the left area LA and the right area RA is defined. The third partition 650 blocks the sound generated in each of the central area CA, the left area LA, and the right area RA from leaking to the outside through each side surface of the display device 100 . It is output only to the front of the display device 100 .

The third partition 650 according to the first example may be provided between the rear edge of the display panel 100 and the top edge of the cover bottom 300 . The third partition 650 according to the second example may be provided between the rear edge of the display panel 100 and the top surface of the middle cabinet 500 . The third partition 650 may have a sealing structure of a four-sided sealing type or a closed loop type.

The first air gap AG1 according to an example is defined by an upper side and a lower side defined by the third partition 650 , a left side defined by the first partition 610 , and the second partition 630 . a right side of the display panel 100 , a front surface defined by the rear surface 100b of the display panel 100 , and a rear surface defined by the upper surface 300a of the cover bottom 300 .

According to an example, the second air gap AG2 includes an upper side, a lower side, and a left side defined by the third partition 650 , and a right side defined by the first partition 610 , the display panel 100 . It may include a front surface defined by the rear surface 100b of the , and a rear surface defined by the upper surface 300a of the cover bottom 300 .

The third air gap AG3 according to an example has an upper side, a lower side, and a right side defined by the third partition 650 , and a left side defined by the second partition 630 , the display panel 100 . It may include a front surface defined by the rear surface 100b of the , and a rear surface defined by the upper surface 300a of the cover bottom 300 .

The first and second partitions 610 and 630 of the present disclosure extend in the vertical direction Y of the display panel 110 to generate a sound generated in the central area CA and a sound generated in the left and right areas LA and RA. can be separated. That is, each of the first and second partitions 610 and 630 is provided at the boundary between the two adjacent air gaps AG1/AG2 and AG1/AG3 and occurs in the two adjacent air gaps AG1/AG2 and AG1/AG3. By attenuating or absorbing the vibration of the display panel 110 , the sound generated in each air gap may be blocked from being transmitted to another air gap.

The first to third partitions 610, 630, and 650 according to an example are double-sided tape or single-sided tape made of polyurethane (PU) or polyolefin (PO) material having a certain height (or thickness) and width, or a foam pad ( Foam Pad) and the like, and may have elasticity that can be compressed to a certain degree.

The first to third partitions 610 , 630 , and 650 according to an example are disposed between the upper surface 300a of the cover bottom 300 and the rear surface 100b of the display panel 100 . In this case, the first to third partitions 610 , 630 , and 650 are physically bonded to and fixed to at least the upper surface of the cover bottom. That is, the first to third partitions 610 , 630 , and 650 should be in contact with the rear surface 100b of the display panel 100 , but may be physically bonded to and fixed to the rear surface of the display panel. It may be in contact with the non-adhered state, and the detailed configuration of the first to third partitions 610 , 630 , and 650 will be described later.

The first to third partitions 610 , 630 , and 650 according to an example are disposed between the upper surface of the middle cabinet 500 and the rear surface 100b of the display panel 100 . In this case, the first to third partitions 610 , 630 , and 650 are physically bonded to and fixed to at least the upper surface of the middle cabinet 500 . That is, the first to third partitions 610 , 630 , and 650 should be in contact with the rear surface 100b of the display panel 100 , but may be physically bonded to and fixed to the rear surface of the display panel. It may be in contact with the non-adhesive.

In addition, as will be described further below, each of the actuators 210 , 230 , and 250 may be composed of two or more sub-actuators, and the sub-actuators have a predetermined distance in the horizontal direction (X) and/or the vertical direction (Y). may be spaced apart. Here, the horizontal direction (or horizontal direction) (X) refers to the longitudinal direction of the long side (or long side) in the display device, and the vertical direction (or vertical direction) (Y) refers to the length direction of the short side (or short side) in the display device. means lengthwise.

3A is a cross-sectional view for explaining an actuator of an example according to the present disclosure, and FIG. 3B is a cross-sectional view for explaining another example of an actuator according to the present disclosure.

The first to third actuators 210 , 230 , and 250 used in the present disclosure may have the same shape, and below, for convenience, the first actuator 210 is representatively described, but the structure of the first actuator 210 . may be equally applied to the second and third actuators 230 and 250 .

The first actuator 210 includes a permanent magnet magnet 211 , a lower plate 212 supporting the magnet 211 , a center pole 213 protruding from the center of the lower plate 212 , and a center pole 213 . It may include a bobbin 214 disposed to surround the periphery, and a coil 215 wound around the bobbin 214 to which a current for generating sound is applied.

The first to third actuators 210 , 230 , and 250 used in the present disclosure, as shown in FIG. 3A , a dynamic type or external magnetic type first in which a magnet 211 is disposed on the outside of the coil 215 . As shown in FIG. 3B , the magnet 211 may include a micro-type or magnetic-resistant second structure in which the magnet 211 is disposed inside the coil 215 .

As shown in Figure 3a, the first actuator 210 having a first structure according to an example is fixed to the support hole 310 provided in the cover bottom 300 through the lower plate 212, the lower plate ( A magnet 211, which is a permanent magnet of an annular shape, is disposed on the periphery of the 212).

An upper plate 216 is disposed on an upper portion of the magnet 211 , and an outer frame 217 protruding from the upper plate is disposed outside the upper plate 216 .

The lower plate 212 may further include a sidewall surrounding the outer surface of each of the magnet 211 and the outer frame 217 .

The center pole 213 is disposed to protrude from the central portion of the lower plate 212 and is inserted into the hollow portion of the bobbin 214 .

The coil 215 is wound around the lower circumferential surface of the bobbin 214 to receive a current for generating sound from the outside. The coil 215 may be expressed in other terms, such as a voice coil.

Additionally, the first actuator 210 having a first structure according to an example may further include a damper 218 disposed between an upper portion of the bobbin 214 and the outer frame 217 .

The lower plate 212 and the upper plate 216 are fixed to the cover bottom 300 while supporting the magnet 211 , the lower plate 212 is provided in a circular shape, and the magnet 211 is the lower plate 212 . It is provided in a ring shape on the upper plate 216 is provided on the magnet (211). The magnet 211 may be fixed between the lower plate 212 and the upper plate 216 as the lower plate 212 and the upper plate 216 are coupled to the cover bottom 300 .

The lower plate 212 and the upper plate 216 may be made of a magnetic material such as iron (Fe). The lower plate 212 and the upper plate 216 are not limited thereto, and may be expressed in other terms such as a yoke.

Alternatively, the center pole 213 and the lower plate 212 may be integrally formed.

The bobbin 214 is a ring (or cylindrical) structure formed of a material processed from pulp or paper, aluminum or magnesium or an alloy thereof, a synthetic resin such as polypropylene, or polyamide-based fiber, and the like, and the bobbin A coil 215 is wound around a predetermined area below the 214 . The bobbin 214 and the coil 215 may be combined to express a voice coil.

When a current is applied to the coil 215 , a magnetic field is formed around the coil 215 , and since there is an external magnetic field formed by the magnet 211 , the entire bobbin 214 is located on the center pole 213 according to Flemings law. It moves upward while being guided by the

Meanwhile, since the front end of the bobbin 214 is in contact with the rear surface 100b of the display panel 100 , the display panel 100 vibrates depending on whether current is applied or not, the vibration of the display panel 100 . sound waves are generated by

Additionally, the bobbin 214 may include a cushioning pad. The buffer pad is disposed at the front end of the bobbin 214 to transmit vertical movement (or vibration) of the bobbin 214 to the display panel 100 . The vibration transmitting member according to an example may be formed of a plate-shaped member having a ring shape attached to the front end of the bobbin 214 .

The magnet 211 may use a sintered magnet such as barium ferrite, and the material is ferric trioxide (Fe).₂O₃), barium carbonate (BaCO₃), a neodymium magnet, strontium ferrite with improved magnetic component, an alloy cast magnet of aluminum (Al), nickel (Ni), or cobalt (Co), but is not limited thereto. The neodymium magnet may be, for example, neodymium-iron-boron (Nd-Fe-B).

The damper 218 is provided in a corrugated structure between the upper portion of the bobbin 214 and the outer frame 217 to adjust the vertical vibration of the bobbin 214 while contracting and relaxing according to the vertical movement of the bobbin 214 . That is, since the damper 218 is connected to the bobbin 214 and the outer frame 217, respectively, the vertical vibration of the bobbin 214 is limited by the restoring force of the damper 218, and specifically, the bobbin 214 is constant. When it vibrates above a height or vibrates below a certain height, the bobbin 214 may return to its original position by the restoring force of the damper 218 .

The damper 218 may be expressed in other terms such as a spider, a suspension, or an edge.

As shown in Figure 3b, the first actuator 210 having a second structure according to an example is fixed to the support hole 310 provided in the cover bottom 300 through the lower plate 212, the lower plate ( A magnet 211 is disposed in the center of the 212 , and a center pole 213 is vertically extended on the magnet 211 .

The upper plate 216 is formed to protrude around the outer periphery of the lower plate 212 , and the outer frame 217 is disposed outside the upper plate 216 . Optionally, the upper plate 216 and the lower plate 212 may be formed as a single body having a "U" shape.

The bobbin 214 is disposed to surround the magnet 211 and the center pole 213 , and a coil 215 is wound around the bobbin 214 . Also, the center pole 213 may be expressed as pole pieces.

In addition, a damper 218 is disposed between the outer frame 217 and the bobbin 214 .

The first actuator 210 having such a second structure has a relatively small leakage flux compared to the first structure in which the magnet 211 is disposed on the outside and may have a small overall size, but the magnetic flux reduction phenomenon due to large current input It can occur and is difficult to manufacture.

In the display device according to the present disclosure, both actuators having the first structure or the second structure may be used, and for convenience, the actuator having the first structure will be described below for convenience.

In addition, the actuator used in the display device according to the present disclosure is not limited to the form shown in FIGS. 3A and 3B , and is a different type of actuator as long as it can generate sound by vibrating the display panel up and down according to the application of current. will be free if used.

4A and 4B are diagrams for explaining a sound generating method of a display device according to the present disclosure.

In the actuators 210 , 230 , and 250 of the sound generating device, the center pole 213 disposed on the lower plate 212 supporting the magnet 211 becomes the N pole, and the upper surface of the magnet 211 and As the connected upper plate 216 becomes the S pole, an external magnetic field is formed between the center pole 213 and the upper plate 216 . In this state, when a current for sound generation is applied to the coil 215, an applied magnetic field is generated around the coil 215, so that the bobbin 214 is moved upwardly (UD) by the applied magnetic field and the external magnetic field, as shown in FIG. 4A . A force is generated to move Accordingly, as the bobbin 214 moves in the upper direction UD, the display panel 100 in contact with the front end of the bobbin 214 vibrates in the upper direction UD.

When the current applied to the coil 215 is stopped while the bobbin 214 is moved upward or a current in the opposite direction is applied to the coil 215 , as shown in FIG. 4B , the bobbin 214 is generated by the applied magnetic field and the external magnetic field. ) is generated in the downward direction (LD). Accordingly, as the bobbin 214 moves in the downward direction LD, the display panel 100 in contact with the front end of the bobbin 214 vibrates in the downward direction LD.

As described above, the display panel 100 vibrates up and down according to the direction and magnitude of the current applied to the coil 215 , and sound waves are generated by the vertical vibration of the display panel 100 .

5A and 5B are views for explaining a coupling structure between a rear support structure and an actuator according to an example in the display device according to the present disclosure;

The actuators 210 , 230 , and 250 of the sound generating device according to the present disclosure may be supported through the support hole 310 formed on the cover bottom (or back cover) 300 , which is a rear support structure of the display device.

As an example, the support hole 310 is formed through the cover bottom 300 , and at least one of the lower plate 212 , the magnet 211 , and the upper plate 216 of the actuators 210 , 230 , and 250 is supported. It is inserted to be accommodated in the inside of the hole (310).

An extension portion 212a extending outwardly from the side is further formed on the rear surface of the lower plate 212 , and the extension portion 212a is fixed to the rear surface of the cover bottom 300 to thereby actuate the actuators 210 , 230 , 250 . may be mounted on the cover bottom 300 by the extension 212a of the lower plate 212 .

As such, when the actuators 210 , 230 , and 250 are fixed to be inserted into the support hole 310 formed in the cover bottom 300 , the distance between the display panel and the cover bottom 300 may be reduced, thereby Therefore, this example has an effect of reducing the thickness of the display device.

That is, an air gap, which is a space in which the display panel can vibrate, must exist between the display panel and the cover bottom 300 , and the actuators 210 , 230 , and 250 are inserted into the support hole 310 of the cover bottom 300 . When configured in a fixed form, the height of the actuators 210 , 230 , and 250 disposed between the rear surface of the display panel and the inner surface of the cover bottom 300 can be reduced, so that the air gap can be minimized.

As an example, in fixing the actuators 210 , 230 , and 250 to the cover bottom 300 , a screw hole 315 is formed on the rear surface of the cover bottom 300 , and the extension part 212a of the lower plate 212 is formed. ) through-holes 212b are formed. Accordingly, the actuators 210 , 230 , and 250 are bolts (or screws) fastened to the screw holes 315 of the cover bottom 300 through the through holes 212b provided in the extension portion 212a of the lower plate 212 . ) 320 may be fixed to the cover bottom 300 .

6A and 6B are views for explaining a coupling structure between a rear support structure and an actuator according to another example in the display device according to the present disclosure.

As shown in FIG. 6A, the actuators 210, 230, 250 and the cover bottom 300 are not simply screwed together, but the actuators 210, 230, 250 are the cover bottom 300 and the lower plate 212. It may be fixed to the cover bottom 300 by a bolt 320 fastened to a pem nut (or self clinching nut) 330 disposed between the extension portions 212a of the . In this case, if a fem nut (or self-clinching nut) 330 is used, a certain space is secured between the actuators 210 , 230 , 250 and the cover bottom 300 , There is an advantage in that it is possible to minimize the transmission of vibrations to the cover bottom 300 .

As shown in FIG. 6B, the actuators 210, 230, and 250 have an adhesive member such as a double side tape disposed between the extension 212a of the lower plate 212 and the cover bottom 300 (double side tape) ( 340 may be adhesively fixed to the cover bottom 300 . In this case, when the adhesive member 340 is used, if the elasticity and thickness of the adhesive member 340 are appropriately adjusted, the adhesive member 340 acts as a kind of damper, so that the vibration of the actuators 210 , 230 , and 250 is the cover bottom. It may have the advantage of being able to minimize the transfer to 300 .

As shown in FIGS. 5A, 6A, and 6B , in this example, the actuators 210 , 230 , and 250 that directly vibrate the display panel are inserted and fixed into the support hole 310 formed in the cover bottom 300 . , compared to a case in which the actuators 210 , 230 , and 250 are completely accommodated in the display device, the thickness of the display device may be reduced.

7A, 7B, and 7C are diagrams for explaining a third partition of a partition in the display device according to the present disclosure.

Of course, the third partition 650 to be described below is not necessarily formed between the middle cabinet 500 and the display panel 100, but is formed inside the display panel ( 100 ) and the cover bottom 300 may be disposed.

7A , in the display device according to the present example, the display panel 100 vibrates by the third actuator 250 disposed between the display panel 100 and the rear support structure (cover bottom 300). It includes a third air gap AG3 that is a space that can do this. That is, when the display panel 100 vibrates, one side of the display panel 100 must be bonded to the rear support structure of the display panel 100 so that a sound (or sound wave) can be generated, and in particular, the generated sound is transmitted to the display device. Since it should not leak to the outside through the side surface, etc., for this purpose, the display device according to the present disclosure includes a third partition 650 provided between the rear surface 100b of the display panel 100 and the rear support structure. .

More specifically, a predetermined section (ie, a third air gap) is defined around the third actuator 250 , and the rear surface 100b of the display panel 100 and the top surface of the cover bottom 300 are at the edges of the section. The third partition 650 is disposed between the upper surface of the 300a or the middle cabinet 500 .

The third partition 650 according to an example includes an adhesive member 652 such as a double-sided tape adhered between the rear surface 100b of the display panel 100 and the upper surface of the rear support structure of the display panel 100 , and an adhesive member ( At least one of the sealing members 654 further disposed outside the 652 may be included. In addition, the partition in which the third partition 650 is formed may be the entire display panel area defined by four outer sides of the display panel 100 , but is not limited thereto. As will be described with reference to FIG. 14A , it may be defined as an area having four sides inside the outer edge of the display panel 100 .

The adhesive member 652 may be formed in a closed loop shape on the edge of the cover bottom 300 or the middle cabinet to be directly attached to the rear surface 100b of the display panel 100 .

The sealing member 654 is formed in a closed loop shape to surround the adhesive member 652 to additionally provide sealing properties of the first to third air gaps AG1 , AG2 , and AG3 . In this case, the height of the sealing member 654 may be relatively larger than the height of the adhesive member 652 .

The rear support structure of the display panel 100 is coupled to the cover bottom 300 in addition to the cover bottom 300 covering the entire rear surface of the display panel 100 and a middle cabinet 500 on which a part of the display panel 100 is seated. ) may be further included.

The middle cabinet 500 according to an example is a frame-shaped member formed along the periphery of the display panel 100 , and includes a horizontal support part 502 on which a part of the display panel 100 is seated, and both sides from the horizontal support part 502 . The vertical support part 504 may be bent in the direction to cover the side surface of the cover bottom 300 and the side surface of the display panel 100 . For example, the middle cabinet 500 may have a ""-shaped cross-section. The middle cabinet 500 constitutes the side exterior of the display device or the set device, and in some cases, it may not be used or may be integrally formed with the cover bottom 300 .

The adhesive member 652 constituting the third partition 650 is a double-sided tape disposed between the upper surface of the horizontal support part of the middle cabinet 500 and the rear surface 100b of the display panel 100 , and is a rear surface of the display panel 100 . (100b) may be adhesively fixed to the middle cabinet (500). Also, the adhesive member 652 may be made of the same material as the first and second partitions.

In addition, the sealing member 654 constituting the third partition 650 is further disposed outside the adhesive member 652 , and has a relatively greater thickness or height than the thickness or height of the adhesive member 652 for sealing properties. can have

The sealing member 654 may be made of an elastic material such as rubber with high elasticity, and as shown in FIG. 7B , a second thickness t2 greater than the first thickness t1 of the adhesive member 652 is have That is, one side of the adhesive surface of the adhesive member 652, which is a double-sided tape, is adhesively disposed to have a first thickness t1 on the inner portion of the upper surface of the horizontal support 502 constituting the middle cabinet 500, and sealing of an elastic material The member 654 is disposed outside the adhesive member 652 to have a second thickness t2 greater than the first thickness t1. In this state, as shown in FIG. 7C , when the display panel 100 is attached to the adhesive surface of the other side of the adhesive member 652 , the sealing member 654 having a larger thickness is pressed to a certain extent and the display panel 100 is and the middle cabinet 500 are adhered. Accordingly, sealing properties of the third air gap AG3 provided around the third actuator 250 may be further improved.

As shown in FIG. 7C , in the display device according to the present example, the display panel 100 and the cover bottom 300 have a third thickness equal to the thickness of the horizontal support part 502 and the adhesive member 652 of the middle cabinet 500 . The vibration space of the display panel 100 that generates sound can be secured by being coupled to each other with the air gap AG3 interposed therebetween, and the sound wave SW generated inside is transmitted through the third air gap AG3. Leakage to the outside of the side surface of the display device may be prevented. In particular, in the display device according to the present example, the third partition 650 disposed at the edge of the air gap AG3 has a double structure including an adhesive member 652 and a sealing member 654 , and the sealing member 654 . By forming the larger thickness (or height) of the air gap AG3, the sealing property of the air gap AG3 is further improved, thereby further blocking sound leakage.

In this example, the middle cabinet 500 may be replaced with other expressions such as a guide panel, a plastic chassis, a p-chassis, a main support, a main support, a mold frame, etc. As a structure having a rectangular frame shape, it may include all types of members connected to the cover bottom and used to support the display panel 100 and the third partition 650 .

In addition, although the middle cabinet 500 may be used to support between the cover bottom 300 and the display panel 100 , the middle cabinet 500 may not necessarily have a structure. That is, when the display device has a support structure of only the cover bottom (or back cover) without the middle cabinet 500 , or when the first or second air gap is defined in a partial area inside the outer periphery of the display device as shown in FIG. 14A , The third partition described with reference to FIG. 7 may be disposed between the upper surface of the cover bottom and the rear surface of the display panel. At this time, the adhesive member 652 in the form of a double-sided tape is disposed on a portion of the upper surface of the cover bottom 300 , and the sealing member 654 has a thickness greater than that of the adhesive member 652 . can be placed in In this structure, the sealing member 654 is compressed when the display panel 100 and the cover bottom 300 are coupled to each other, thereby increasing the sealing property of the third air gap AG3 for sound transmission.

In this example, the thickness of the third air gap AG3 , that is, the distance between the display panel 100 and the cover bottom 300 within the third air gap AG3 may be set to about 0.8 to 2.5 mm, but is limited thereto. not, and may be set to a different range depending on the degree of vibration of the display panel 100 .

8A is a diagram of a display device according to a comparative example, and FIG. 8B is a graph illustrating sound generation characteristics of the display device according to the comparative example and the display device according to the present disclosure.

First, the display device according to the comparative example divides only the left and right areas LA and RA without the central area, and the actuators 230 and 250 disposed in each of the left area LA and the right area RA, and the left area LA. ) and one partition 600 spatially separating the right area RA. That is, the display device of the comparative example includes a two-channel type sound generating device that provides only left and right stereo sounds without a central bass region.

In FIG. 8B , a dotted line indicates sound pressure characteristics for each sound range of the 2-channel type display device according to the comparative example, and it can be seen that the sound pressure in the low range is relatively low. When the display panel, which is a diaphragm, is enlarged to overcome the low-pitched sound of the display device of the comparative example, the resonance frequency of the low-pitched sound is reduced, but the frequency band of the high-mid range is also lowered. In addition, a method of further disposing a separate speaker outputting low tones at a certain position of the display device or the set device may be considered. Accordingly, the location of the sound in each frequency band is different, so the sense of immersion in sound transmission may be reduced.

On the other hand, in FIG. 8B , the solid line indicates the sound pressure characteristics for each sound band for the 2.1 channel type display device according to the present disclosure, and compared with the dotted line for the display device of the comparative example, the display device according to the present disclosure compared to the display device of the comparative example In the display device, it can be seen that the sound pressure of the low-pitched range, particularly the frequency band of 200 Hz or less, is increased, and it can be confirmed that the sound pressure of the high-pitched range of 3 kHz or more is also increased.

As such, the display device according to the present disclosure including the 2.1-channel type sound generating device may have improved low-pitched and high-pitched acoustic characteristics compared to a 2-channel type display device in which only left and right stereos are implemented, and both low and high-pitched sounds Since it is generated on the same display panel, it is possible to improve immersion in sound transmission and realize a vivid sense of presence.

9 is a view for explaining a phenomenon of weakening of acoustic characteristics due to a reflected sound wave reflected from a partition in the display device according to the present disclosure;

As shown in FIG. 9 , sound waves generated by vibrating the display panel by each actuator 210 , 230 , and 250 propagate radially from the center of the actuators 210 , 230 , and 250 . It is expressed as a traveling wave (A). At this time, when the traveling wave A meets the partition 600 , it is reflected by the partition 600 to generate a reflected wave B traveling in the opposite direction. This reflected wave (B) overlaps and interferes with the traveling wave (A) to form a so-called standing wave in which the superimposed sound wave does not proceed any more and is stagnant at a certain position, and the sound pressure is reduced by this standing wave Acoustic output characteristics may deteriorate.

For example, a standing wave is generated by the traveling wave A from the first actuator 210 and the reflected wave B reflected from the second partition 630 , and thus the bass characteristics may deteriorate. In addition, since the traveling waves D and E are obliquely reflected even in the corner area of the central area CA, such sound quality deterioration may occur. In particular, since the output of the first actuator 210 in charge of the bass sound is greater and the distance to the partition 600 is far, the standing wave generated at the horizontal point of the central area CA (the area indicated by the dotted line in FIG. 9 ) becomes the largest. That is, the sound quality is weakened by the standing wave in the left area (LA) or the right area (RA), but the low-pitched sound wave in the center area (CA) has a longer wavelength and a larger amplitude, so the effect of the standing wave is greater. receive Accordingly, in another example of the present disclosure, by changing the shape of the partition 600, it is possible to minimize the deterioration of sound quality due to such a standing wave.

10A and 10B are diagrams for explaining a structure of a partition according to an example in a display device according to another example of the present disclosure;

As shown in FIG. 10A , in the partition 1600 according to an example, each of the first and second partitions 1610 and 1630 is not in a simple straight shape, but includes a bent portion 1611 bent in the middle. have Specifically, the bent portion 1611 of each of the first and second partitions 1610 and 1630 may have the same vertical position as the center of the first actuator 210 disposed in the central area CA. That is, the tip position of the bent portion 1611 in each of the first and second partitions 1610 and 1630 may be arranged on the same horizontal line as the center P of the first actuator 210 .

In this way, when the bent portion 1611 is formed in each of the first and second partitions 1610 and 1630 , the traveling wave B traveling in the horizontal direction from the first actuator 210 is obliquely reflected up and down or each other. By being reflected in different directions, the formation of a standing wave due to the overlap between the traveling wave B and the reflected wave B is minimized, and thus the degradation of the bass sound characteristics due to the above-described standing wave can be improved.

As described above, the low-pitched sound wave generated from the first actuator 210 provided in the central area CA rather than the sound wave generated from each of the second and third actuators 230 and 250 is a standing wave because the wavelength is long and the amplitude is large. are more affected by Accordingly, in the display device according to the present example, each of the first and second partitions 1610 and 1630 has a bent portion 1611 bent toward the center of the first actuator 210 , so that Sound quality deterioration can be minimized.

In addition, the bent portion 1611 of each of the first and second partitions 1610 and 1630 does not necessarily have a sharp shape bent in a straight line as shown in FIG. 10A , and includes a curved shape as shown in FIG. 10B . You may.

However, as described above, since each of the first and second partitions 1610 and 1630 is made of double-sided tape or the like, the bent portion 1611 of each of the first and second partitions 1610 and 1630 is similar to that of FIG. 10B . It may have a curved straight shape that is easier to manufacture than the same curved shape as shown in FIG. 10A. Each of the first and second partitions 1610 and 1630 according to an example includes a first straight part 1613 and a second straight part 1615 and a first straight part 1613 extending at a constant angle to the vertical direction. ) and the second straight portion 1615 may be more advantageous in assembly to have the bent portion 1611 formed as a bent portion.

11A and 11B are diagrams for explaining a structure of a partition according to another example in a display device according to another example of the present disclosure;

First, in the display device illustrated in FIG. 2 , an example in which each actuator 210 , 230 , and 250 is configured as one single actuator has been described. However, in the display device according to the present example, the first actuator 210 or the second and second actuators One or more of the three actuators 230 and 250 may include two or more sub-actuators spaced apart from each other.

As an example, the first actuator 2210 is composed of a single actuator disposed in the center of the central area CA, as shown in FIG. 11A , or two actuators disposed adjacent to each other in the horizontal direction as shown in FIG. 11B . It may be composed of sub-actuators SA1 and SA2.

As an example, the second actuator 2230 includes two sub-actuators SA1 and SA2 spaced apart from each other by a predetermined distance in the vertical direction, that is, in the longitudinal direction of the first partition 2610 in the left area LA. can be Similarly, the third actuator 2250 may be composed of two sub-actuators SA1 and SA2 spaced apart from each other by a predetermined distance in the vertical direction, that is, in the longitudinal direction of the first partition 2610 in the right area RA. can Here, the second actuator 2230 and the third actuator 2250 may be symmetrically disposed with respect to the central area CA.

In this example, each of the first and second partitions 2610 and 2630 may be formed to have first to third bent portions 2611a, 2611b, and 2611c, and each of the bent portions 2611a, 2611b, and 2611c. may have a sharp shape bent in a straight line as shown in FIG. 11A or may have a curved shape as shown in FIG. 11B .

Describing the first partition 2610 as a reference, the central second bent part 2611b faces the center P of the first actuator 2210, and the upper first bent part 2611a is the left area LA. ) toward the center of the first sub-actuator SA1 disposed on the upper portion, and the lower third bent portion 2611c faces the center of the second sub-actuator SA2 disposed under the left area LA can be formed. That is, the tip points of the first to third bent portions 2611a, 2611b, and 2611c of the first partition 2610 are the first sub-actuator SA1 of the left area LA and the first of the central area CA, respectively. The actuator 2210 and the center of the second sub-actuator SA2 of the left area LA have the same vertical position.

In the case of such a configuration, as shown in FIG. 11A , the traveling wave traveling in the horizontal direction from the first actuator 2210 is caused by the second bending portion 2611b of each of the first and second partitions 2610 and 2630 . The traveling waves that are dispersed and reflected up and down, and travel in the horizontal direction from the first sub-actuator SA1 of the second and third actuators 2230 and 2250, respectively, are the first of the first and second partitions 2610 and 2630, respectively. The first and second partitions 2610 and 2630 are dispersed and reflected by the bent portion 2611a, and the traveling waves traveling in the horizontal direction from the second sub-actuator SA2 of the second and third actuators 2230 and 2250, respectively. ) by being dispersed and reflected by the third bent portion 2611c, the formation of standing waves in all sound ranges can be suppressed.

As described above, the display device according to the present example includes two sub-actuators SA1 and SA2 in which the second and third actuators 2230 and 2250 are vertically spaced apart, and partitions 2610 and 2630 are each actuator. Since it is configured in a zigzag shape having three bent portions 2611a, 2611b, and 2611c facing toward , deterioration of sound quality characteristics due to standing waves in both low and mid-range bands can be minimized.

12A, 12B, and 12C are diagrams for explaining the structure of the first and second partitions in the display device according to the present disclosure. Hereinafter, the first partition 610 among the first and second partitions is illustrated. explain as a representative.

12A to 12C , the first partition 610 according to this example extends in the vertical direction (or thickness direction) of the display panel 100 , and is a display panel 100 and a rear support structure of the display panel. It is a barrier rib structure disposed between the cover bottom 300, and separates the high- and high-pitched sound generated by the second actuator from the low-range sound generated by the first actuator, thereby preventing deterioration of acoustic properties due to interference between the two sounds. .

The first partition 610 according to an example may be formed of a foam pad or one-sided/double-sided tape, and must be adhered to at least the upper surface 300a of the cover bottom 300 , and the rear surface 100b of the display panel 100 . Contacts may be in adhesive or non-adhesive form.

In addition, the first partition 610 may be in contact with the rear surface 100b of the display panel 100 in a non-adhesive form in order to separate the low- and high-pitched sounds and to improve the low-pitched sound emission characteristics. Based on the thickness direction Z of 100 , the height H1 of the first partition 610 is the distance T between the display panel 100 and the cover bottom 300 , that is, the air gap AG. It can be equal to or greater than the thickness.

Meanwhile, the top surface of the first partition 610 should be in contact with the rear surface 100b of the display panel 100 , but may be directly attached to and fixed to the rear surface 100b of the display panel 100 , or the display panel ( It may be in contact with the rear surface 100b of 100 , in a non-adhesive state.

The first partition 610 according to an example includes a lower adhesive layer 611 directly attached to the upper surface 300a of the cover bottom 300 and a rear surface 100b of the display panel 100 as shown in FIG. 12A . ) may be configured to include an upper adhesive layer 613 directly adhered to, and a partition member 615 disposed between the upper and lower adhesive layers 611 and 613 . The first partition 610 according to this example is directly attached and fixed to both the upper surface 300a of the cover bottom 300 and the rear surface 100b of the display panel 100 . As described above, the double-sided adhesive structure in which the first partition 610 is bonded to both the cover bottom 300 and the display panel 100 absorbs vibrations generated in the air gap and the vibrations are not transmitted to the other air gaps. It has an advantage in that it has excellent sound separation characteristics between low and mid-range tones.

However, in the structure of the first partition 610 shown in FIG. 12A , since the vibration in the first air gap and the vibration in the second air gap are completely separated, the size of the diaphragm becomes smaller, so that the low-pitched sound pressure can be reduced. have.

The first partition 610 according to another example is disposed on the lower adhesive layer 611 directly attached to the upper surface 300a of the cover bottom 300 and the lower adhesive layer 611 as shown in FIG. 12B . By including only the partition member 615 , it may be adhered only to the upper surface 300a of the cover bottom 300 and may be in contact with the rear surface 100b of the display panel 100 in a non-contact manner. That is, in the first partition 610 of this example, unlike FIG. 12A , since the upper adhesive layer 613 is omitted, the top surface of the partition member 615 contacts the rear surface 100b of the display panel 100 but is not physically adhered. while simply supporting the rear surface 100b of the display panel 100 .

The first partition 610 according to this example is in contact with the display panel 100 in a state that is not adhered to it, and thus, when a weak vibration is generated for outputting a mid-range sound, the vibration is almost absorbed to reduce the sound separation between the low- and high-pitched tones. At the same time, if there is strong vibration in the low-pitched range, the low-pitched sound characteristics can be maintained by reducing the amount of vibration attenuation. That is, according to the structure of the first partition 610 shown in FIG. 12B , sound separation characteristics can be secured in the middle and high-pitched range, and the low-pitched sound pressure can be minimized by using the diaphragm largely in the low-pitched range. In other words, when the display panel vibrates weakly for outputting sound in the mid-range range, the first partition 610 absorbs almost the vibration to maintain the sound separation characteristics between the low-pitched tone and the left high-mid tone, and the diaphragm for outputting the low-pitched tone sound. In the case of strong vibration, the first partition 610 absorbs only a part of the vibration, so that the entire display panel 100 is used as a vibration plate to maintain low-pitched sound characteristics.

As shown in FIG. 12C , the first partition 610 according to the present example may have a height H1 greater than a gap T between the display panel 100 and the cover bottom 300 . That is, when the gap between the display panel 100 and the cover bottom 300 is T when the display panel 100 is coupled to the cover bottom 300 , the height H1 of the first partition 610 is It may be equal to or greater than the gap T between the display panel 100 and the cover bottom 300 . Here, the height H1 of the first partition 610 means the height of the first partition 610 before being mounted between the display panel 100 and the cover bottom 300 . Accordingly, the first partition 610 completely fills the gap T between the display panel 100 and the cover bottom 300 so that the top surface of the first partition 610 is the rear surface 100b of the display panel 100 . and the first partition 610 may be compressed to a certain extent during assembly between the display panel 100 and the cover bottom 300 .

As such, in this example, the height H1 of the first partition 610 is greater than the gap T between the display panel 100 and the cover bottom 300 , so that the first partition 610 as described above is It is possible to improve the sound separation characteristics by

On the other hand, when the difference between the gap T between the display panel 100 and the cover bottom 300 and the height H1 of the first partition 610 is large, the sound separation characteristic is improved and the sound distortion is improved. is small, the sound pressure in the low range may be reduced, and conversely, there is little difference between the gap T between the display panel 100 and the cover bottom 300 and the height H1 of the first partition 610 . In this case, the reduction in sound pressure in the low-pitched range is minimized, but the sound separation characteristics may be somewhat degraded. Accordingly, by appropriately selecting the height H1 of the first partition 610 with respect to the gap T between the display panel 100 and the cover bottom 300 , the low-range sound pressure is reduced and the sound pressure is reduced while maintaining the sound separation characteristic. distortion can be minimized.

Meanwhile, the first partition 610 may be determined to have a constant width W, for example, about 8 to 12 mm. At this time, when the width W of the first partition 610 increases, the sound separation characteristics are excellent, but as a result, the sound output amount can be reduced by reducing the left and right diaphragms, and when the width W is small, the necessary sound separation characteristics are maintained. it won't be possible Therefore, in the present disclosure, by setting the width W of the first partition 610 to about 8 to 12 mm, it is possible to minimize the reduction in sound pressure while maintaining the sound separation characteristics.

13A and 13B are diagrams for explaining a partition according to another example in the display device according to the present disclosure.

First, in the above-described examples, it has been described that the third partition 1650 is disposed along the edge of the display panel, but the present invention is not limited thereto. As shown in FIG. 13A , the third partition 1650 is the display panel 100 . It may be disposed on the inside spaced apart from the edge of the. In this case, the third partition 1650 may be separated from the middle cabinet and disposed between the display panel 100 and the cover bottom 300 , and as described above, has a double structure including an adhesive member and an outer sealing member thereof. can

Each of the actuators 210 , 230 , and 250 may ideally be disposed in the center of each of the central area CA, the left area LA, and the right area RA. That is, when the actuators 210 , 230 , and 250 are disposed at the exact center of the corresponding region, the size of the vertical, left, and right vibration spaces are the same, so that the vibration characteristics may be the most excellent.

However, depending on the size of the display panel, the center area CA and the left and right areas LA and RA may not be square. In such a case, as shown in FIG. 13A , the third partition 1650 is disposed inside the display panel 100 away from the edge, not the edge, so that the center area CA and the left and right areas LA and RA are provided. may be formed in a square shape, and each of the actuators 210 , 230 , and 250 may be disposed at positions symmetrical to the right and left in the corresponding area.

As such, in this example, the first actuator 210 and the second and third actuators 230 and 250 may be disposed in the center of the center area CA, the left area LA, and the right area RA, respectively. By setting the positions of the first to third partitions 610 , 630 , and 1650 , it is possible to not only improve stereo sound realization characteristics, but also to prevent unilateral vibration to improve durability of the display device and reliability of sound output. .

Also, as shown in FIG. 13B , in this example, each of the first partition 3610 and the second partition 3630 may be implemented as a dual structure including two sub-partitions SP1 and SP2 in parallel with each other.

In general, there is a difference between the resonance frequency (frequency) of the low-pitched sound generated in the center area (CA) and the resonance frequency of the high-pitched sound generated in the left and right areas (LA, RA). It has the potential to adversely affect the acoustic properties.

Therefore, each of the first partition 3610 and the second partition 3630 according to the present example has the same structure in order to further ensure the sound separation characteristics of the central area CA and the left and right areas LA and RA. The above sub-partitions SP1 and SP2 may be implemented in a double structure in which they are arranged in parallel to be spaced apart by a predetermined distance. At this time, as the distance d1 between the two or more sub-partitions SP1 and SP2 increases, the sound separation characteristic is improved, but since the vibration region of each region is reduced, there is a possibility that the sound pressure may be reduced. The distance d1 between SP2) is preferably set to about 5 to 15 mm. That is, each of the first partition 3610 and the second partition 3630 has two or more structures including two or more sub-partitions SP1 and SP2, and the distance d1 between adjacent sub-partitions SP1 and SP2 is about By setting it to 5~15mm, it is possible to further improve the sound separation characteristics in the low and midrange tones without reducing the sound pressure.

14A is a rear view of a display device according to another example of the present disclosure, and FIG. 14B is a cross-sectional view taken along line II-II of FIG. 14A .

14A and 14B , a display device according to another example of the present disclosure includes a display panel 100 , a sound generating device 200 , a partition 600 , and a metal plate 800 , which includes a low-pitched sound. A metal plate 800 having improved characteristics and a heat dissipation function is additionally configured in the display device according to an example of the present disclosure illustrated in FIGS. 2A and 2B . Accordingly, in the following description, only the metal plate 800 will be described, and redundant description of the remaining components will be omitted.

In the display device according to the present example, the metal plate 800 is disposed around the first actuator 210 . The metal plate 800 is a plate-shaped member having a constant mass and thermal conductivity, and may be attached to a portion of the display panel 100 in the central area CA, and the first actuator 210 is positioned at the center. can be placed and placed. Here, the metal plate 800 may be expressed in other terms such as a heat sink, a heat dissipation sheet, a heat dissipation layer, or a heat dissipation member.

In general, when the strength of the sound generating diaphragm is s and the weight is m, the lowest resonant frequency f0 of the sound wave generated by the vibration of the diaphragm is determined by Equation 1 below.

[Equation 1]

<img file="KR20180062320A_D0001.tif" />

Therefore, when the above-described metal plate 800 is used, the weight of the diaphragm is increased in Equation 1, thereby reducing the lowest resonant frequency (frequency) of the sound wave generated by the vibration of the diaphragm, thereby further improving the bass characteristics. can be

In addition, compared to the second and third actuators 230 and 250, respectively, the first actuator 210 may generate more than a certain amount of heat inside due to its strong output, and this heat may be absorbed by the metal plate 800 to a certain extent. can In particular, when the display panel 100 is an organic light emitting display panel, since an organic light emitting material disposed therein is particularly vulnerable to heat, when heat generated by the first actuator 210 is transferred to the organic light emitting material, Performance degradation may occur.

Accordingly, in the display device according to the present example, the metal plate 800 acts as a heat sink for dissipating heat generated by the first actuator 210 , thereby preventing deterioration in performance of the display panel due to heat.

The metal plate 800 according to an example may be formed of a metal material such as aluminum (Al), copper (Cu) or silver (Ag) and alloys thereof, but is not limited thereto, and a material having thermal conductivity and a constant mass. That would be enough. In addition, the thickness, size, etc. of the metal plate 800 may be appropriately selected according to the degree of bass reinforcement according to Equation 1 above. In addition, the metal plate 800 may be symmetrically disposed with respect to the first actuator 210 to enable uniform vibration of the display panel in the central area CA.

15 is a view for explaining a coupling structure between the display panel and the metal plate and the coupling structure between the actuator and the metal plate shown in FIGS. 14A and 14B .

Referring to FIG. 15 , the metal plate 800 according to the present example is adhered to the rear surface 100b of the display panel 100 via the adhesive layer 900 . At this time, the metal plate 800 may have a polygonal plate shape or a circular plate shape having a constant thickness while having a relatively wider size than the size of the actuators 210 , 230 , 250 in contact, based on Equation 1 above. have. The metal plate 800 according to an example may be a heat dissipation sheet or a heat dissipation tape formed of a metal material having high thermal conductivity, such as aluminum (Al), copper (Cu), silver (Ag), and alloys thereof.

The adhesive layer 900 is formed on the upper surface of the metal plate 800 facing the rear surface 100b of the display panel 100 to adhere the metal plate 800 to the rear surface 100b of the display panel 100 . Accordingly, the metal plate 800 is adhesively fixed to the rear surface 100b of the display panel 100 by the adhesive layer 900 . Additionally, the adhesive layer 900 may include thermally conductive particles for transferring heat from the metal plate 800 to the rear surface 100b of the display panel 100 .

The actuators 210 , 230 , and 250 are adhered to the rear surface 800a of the metal plate 800 via the double-sided adhesive member 951 .

The double-sided adhesive member 951 according to an example is attached to the front end of the bobbin 214 provided in the actuators 210, 230, and 250 and at the same time attached to the rear surface 800a of the metal plate 800 by being attached to the metal plate 800. The rear surface 800a of the and the bobbin 214 of the actuators 210, 230, and 250 are coupled to each other.

The double-sided adhesive member 951 according to an example is a base member covering the entire upper surface of the bobbin 214 provided in the actuators 210 , 230 , and 250 , provided on the upper surface of the base member and directly attached to the metal plate 800 . It includes an upper adhesive layer, and an upper adhesive layer provided on the rear surface of the base member and directly attached to the tip of the bobbin 214 . For example, the double-sided adhesive member 951 may be a double-sided tape.

Each of the upper and lower adhesive layers of the double-sided adhesive member 951 serves as a fixing member for fixing the actuators 210 , 230 , and 250 to the metal plate 800 , so it must have high adhesive force (or adhesive force). That is, since the double-sided adhesive member 951 is disposed to cover the entire upper surface of the bobbin 214 provided in the actuators 210, 230, and 250, heat generated and introduced according to the driving of the actuators 210, 230, and 250 may be transferred to the metal plate 800 . Accordingly, the double-sided adhesive member 951 has heat resistance against heat flowing from the actuators 210 , 230 , and 250 , and the adhesive force between the metal plate 800 and the actuators 210 , 230 , 250 is high so as not to be lowered by heat. It should have adhesive strength. Accordingly, the double-sided adhesive member 951 may be formed of a double-sided tape having high adhesive strength.

Additionally, when the buffer pad 219 is fixed to the tip of the bobbin 214 facing the rear surface 800a of the metal plate 800 , the double-sided adhesive member 951 is attached to the buffer pad 219 and at the same time as the metal plate. It may be adhered to the rear surface 800a of the 800 .

The metal plate 800 is coupled to the actuators 210, 230, and 250 by the double-sided adhesive member 951, thereby overlapping the actuators 210, 230, 250 and a heat inlet area (HFA) and a heat inlet area (HFA). It may include a surrounding heat diffusion area (HDA). Here, the size of the heat inlet area HFA may correspond to the size of the bobbin 214 provided in the actuators 210 , 230 , and 250 , and the heat diffusion area HDA is the size of the actuators 210 , 230 and 250 . It can be set according to the output.

As described above, in the display device according to the present example, the metal plate 800 spreads heat generated by the actuators 210 , 230 , and 250 to a wide area, thereby overlapping the display panel with the actuators 210 , 230 , and 250 . It is possible to prevent image quality deterioration of the display panel 100 caused by a sudden temperature difference in the local area of ( 100 ). That is, the metal plate 800 spreads heat flowing from the actuators 210 , 230 , and 250 to the heat inlet area HFA widely through the heat diffusion area HDA to lower the temperature of the heat inlet area HFA. It is possible to prevent image quality deterioration occurring in the area of the display panel 100 overlapping the heat inlet area HFA due to a local temperature increase of the heat inlet area HFA.

Additionally, the metal plate 800 according to this example further includes at least one exhaust hole 801 .

At least one exhaust hole 801 is provided to penetrate through the metal plate 800 along the thickness direction Z of the metal plate 800 . When the at least one exhaust hole 801 is attached (or attached) between the metal plate 800 and the rear surface 100b of the display panel 100 via the adhesive layer 900 , air bubbles and/or It may serve as an exhaust passage for evacuating air bubbles generated between the rear surface 100b of the display panel 100 and the adhesive layer 900 . Here, the exhaust hole 801 may be expressed in other terms such as an exhaust hole, a defoaming hole, a vent hole, a ventilation hole, or a ventilation hole.

Accordingly, in the display device according to the present example, the metal plate 800 having the at least one exhaust hole 801 is disposed between the rear surface 100b of the display panel 100 and the actuators 210 , 230 , and 250 , thereby providing low-pitched sound characteristics. This is improved, and heat generated according to the driving of the actuators 210 , 230 , and 250 is spread widely through the metal plate 800 , so that it occurs in the area of the display panel 100 overlapping with the actuators 210 , 230 , and 250 . quality deterioration can be prevented. In addition, in the display device according to the present example, air bubbles generated when the metal plate 800 and the rear surface 100b of the display panel 100 are adhered via the adhesive layer 900 are formed on the metal plate 800 by at least one By being exhausted to the outside through the exhaust hole 801 , an adhesion failure or a decrease in adhesion strength due to air bubbles during adhesion between the metal plate 800 and the display panel 100 may be prevented.

16A and 16B are views for explaining a metal plate according to another example of the present disclosure.

As shown in FIG. 16A , the metal plate 800 according to the present example includes an actuator coupling region 803 coupled to the above-described actuator, and a plurality of exhaust holes 801 .

The actuator coupling region 803 has a size corresponding to the size of the actuator, and a central portion thereof may overlap a central portion of the metal plate 800 .

The plurality of exhaust holes 801 may be provided to pass through the metal plate 800 along the thickness direction Z of the metal plate 800 to be spaced apart from each other. For example, the plurality of exhaust holes 801 may be perforated in the metal plate 800 to have a circular shape or an oval shape.

The plurality of exhaust holes 801 according to an example may be disposed to be spaced apart from each other around a central portion of the metal plate 800 . For example, the plurality of exhaust holes 801 may be disposed around the actuator coupling area 803 except for the actuator coupling area 803 . That is, each of the plurality of exhaust holes 801 may be disposed between a central portion and an edge portion of the metal plate 800 . In this case, each of the plurality of exhaust holes 801 may be disposed to be relatively close to a central portion of the metal plate 800 rather than a distance from an edge portion of the adjacent metal plate 800 . Here, when the plurality of exhaust holes 801 are disposed in the actuator coupling region 803 , heat generated according to the driving of the actuator may be directly introduced into the display panel through the plurality of exhaust holes 801 . In this case, it is preferable that the plurality of exhaust holes 801 be disposed in areas other than the actuator coupling area 803 , because image quality may be deteriorated due to a temperature increase in a local area of the display panel.

As an example, the bonding process between the metal plate 800 and the display panel through the adhesive layer is performed continuously along the other side of the metal plate 800 in a predetermined bonding direction after bonding one side of the metal plate 800 to the display panel. It can be carried out in a manner of adhesion. Bubbles generated during the continuous bonding process may be discharged to the outside through the plurality of exhaust holes 801 . Here, the metal plate 800 may have a plurality of virtual lines VL1 , VL2 , and VL3 spaced apart from each other while parallel to the bonding direction, and the same number of, for example, two or more exhaust holes in each of the plurality of virtual lines. 801 may be disposed. Optionally, the exhaust holes 801 disposed in the adjacent virtual lines VL1 , VL2 , and VL3 may be disposed to be alternated with each other.

As another example, in the bonding process between the metal plate 800 and the display panel using an adhesive layer, the entire metal plate 800 is temporarily bonded to the display panel, and then an adhesive jig such as a roller that moves in a predetermined bonding direction is used. It may proceed in a manner of continuous and complete adhesion from one side to the other side of the metal plate 800 by using it. In this case, when bonding using an adhesive jig, air bubbles generated in the temporary bonding process may be moved by the bonding jig and discharged to the outside through the plurality of exhaust holes 801 .

In addition, each of the plurality of exhaust holes 801 according to another example may be perforated in the metal plate 800 to have a rectangular shape having a constant width and length, as shown in FIG. 16B . As an example, each of the plurality of exhaust holes 801 may have an oblique shape or a comb-tooth shape inclined in a predetermined direction (or angle). Here, the metal plate 800 may have a plurality of virtual lines VL1 and VL2 spaced apart from each other while parallel to the bonding direction, and the same number, for example, two virtual lines VL1 and VL2, respectively. The above exhaust holes 801 may be arranged side by side to have a constant interval. Optionally, the exhaust holes 801 disposed in the adjacent virtual lines VL1 and VL2 may be disposed symmetrically with respect to the center line between the adjacent virtual lines VL1 and VL2 or the actuator coupling region 803 .

FIG. 17 is a view for explaining a display panel and a heat dissipation member in a display device according to another example of the present disclosure, which radiates heat to the entire rear surface of the display panel instead of a metal plate in the display device shown in FIGS. 14A and 14B . It is constructed by attaching members. Accordingly, hereinafter, the display panel and the heat dissipation member will be described, and repeated descriptions of the configuration of the remaining display devices will be omitted.

Referring to FIG. 17 , in the display device according to this example, the display panel 100 includes a thin film transistor array substrate (or lower substrate) 110 and a pixel array unit 130 provided on the thin film transistor array substrate 110 . , and an opposing substrate (or an upper substrate 150 ) covering the pixel array unit 130 .

The thin film transistor array substrate 110 may be made of a transparent material, for example, a light-transmitting plastic or glass material.

The pixel array unit 130 is a circuit including a plurality of pixels defined by a plurality of gate lines and a plurality of data lines provided on the thin film transistor array substrate 110 , and a thin film transistor provided in each pixel to drive each pixel. layer, and a protective layer covering the circuit layer, and an organic light emitting device layer provided on the protective layer and connected to the circuit layer.

The opposing substrate 150 may be coupled to an edge portion of the thin film transistor array substrate 110 to cover the pixel array unit 130 , or may be attached to the entire front surface of the pixel array unit 130 . The opposing substrate 150 protects the thin film transistor and the organic light emitting device layer from external impact, and prevents moisture from penetrating into the organic light emitting device layer. Accordingly, the opposite substrate 150 may be expressed as an encapsulation substrate. In addition, the counter substrate 150 also serves to dissipate heat generated by the pixel array unit 130 . The opposite substrate 150 according to an example may be made of any one of aluminum, an aluminum alloy, a magnesium alloy, and an alloy of iron and nickel.

The heat dissipation member 810 has a size corresponding to the entire rear surface of the display panel 100 . The heat dissipation member 810 is adhered to the entire rear surface 100b of the display panel 100 , ie, the entire rear surface of the opposite substrate 150 , via the adhesive layer 910 . Accordingly, the heat dissipation member 810 is disposed in both the central area CA, the left area LA, and the right area RA of the display panel 100 .

The heat dissipation member 810 may be a heat dissipation sheet having a constant thickness. For example, the thickness of the heat dissipation sheet may be set based on Equation 1 described above. The heat dissipation sheet may be formed of a metal material having high thermal conductivity, such as aluminum (Al), copper (Cu), silver (Ag), and alloys thereof.

The adhesive layer 910 is formed on the upper surface of the heat dissipation member 800 facing the opposing substrate 150 of the display panel 100 so that the heat dissipating member 810 is attached to the back surface of the opposing substrate 150 provided in the display panel 100 . glued all over. Accordingly, the heat dissipation member 810 is adhesively fixed to the rear surface 100b of the display panel 100 by the adhesive layer 910 .

The heat dissipation member 810 is coupled to the corresponding actuators 210 , 230 , and 250 via a double-sided adhesive member in each of the central area CA, the left area LA, and the right area RA of the display panel 100 . do.

Optionally, the heat dissipation member 810 may have a size corresponding to the entire rear surface of the display panel 100 except for the rear edge of the display panel 100 .

Additionally, the heat dissipation member 810 includes a plurality of exhaust holes 811 .

The plurality of exhaust holes 811 are formed by being perforated in the heat dissipation member 810 . When the plurality of exhaust holes 811 are attached (or attached) between the heat dissipation member 810 and the rear surface 100b of the display panel 100 via the adhesive layer 910 , air bubbles and/or display in the adhesive layer 910 are formed. It may serve as an exhaust passage for evacuating air bubbles generated between the back surface 100b of the panel 100 and the adhesive layer 910 . Here, the exhaust hole 811 may be expressed in other terms such as an exhaust hole, a defoaming hole, a vent hole, a ventilation hole, or a ventilation hole.

The plurality of exhaust holes 811 may be disposed in areas other than areas coupled to the actuators 210 , 230 , and 250 . In this case, each of the plurality of exhaust holes 811 may be disposed at a point where air bubbles are easily discharged through a prior experiment based on the attachment method of the heat dissipation member 810 and the size of the heat dissipation member 810 .

The plurality of exhaust holes 811 are provided in the heat dissipation member 810 to have a circular (or elliptical) shape as shown in FIG. 16A , or a rectangular shape having a constant width and length as shown in FIG. 16B , or It may be provided on the heat dissipation member 810 so as to have an oblique shape or a comb shape inclined at a certain angle.

As described above, in the display device according to the present example, since the heat dissipation member 810 is attached to the entire rear surface of the display panel 100 , the low sound characteristics are improved, and the heat generated by driving the actuator is more efficiently dissipated. Therefore, it is possible to prevent image quality deterioration occurring in the area of the display panel 100 overlapping the actuator. In addition, in the display device according to the present example, air bubbles generated when the heat dissipation member 810 and the rear surface 100b of the display panel 100 are adhered via the adhesive layer 910 to at least one of the heat dissipation members 800 are provided. When the heat dissipation member 810 and the display panel 100 are adhered to the outside by being exhausted to the outside through the exhaust hole 811 , adhesion failure or deterioration of adhesion due to air bubbles may be prevented.

18 is a view for explaining a display panel and a heat dissipation member in a display device according to another example of the present disclosure, which is configured by changing the heat dissipation member in the display device shown in FIG. 17 . Accordingly, hereinafter, only the heat dissipation member will be described, and repeated descriptions of the configuration of the remaining display devices will be omitted.

Referring to FIG. 18 , in the display device according to the present example, the heat dissipation member 820 is directly integrated with the rear surface 100b of the display panel 100 , that is, the rear surface of the opposite substrate 150 .

The heat dissipation member 820 is formed directly on the rear surface of the opposing substrate 150 to have a constant thickness and is disposed in both the center area CA, the left area LA, and the right area RA of the display panel 100 . . The heat dissipation member 820 according to an example may be formed of a metal material having high thermal conductivity, such as aluminum (Al), copper (Cu), silver (Ag), or an alloy thereof. The heat dissipation member 820 may be directly formed on the rear surface of the opposite substrate 150 through a deposition process, a coating process, or a plating process corresponding to the material thereof.

The heat dissipation member 820 is coupled to a corresponding actuator via a double-sided adhesive member in each of the central area CA, the left area LA, and the right area RA of the display panel 100 .

The heat dissipation member 820 may be expressed as a heat dissipation layer that is directly integrated with the opposing substrate 150 . That is, as the heat dissipation member 820 is integrated with the opposing substrate 150 without the adhesive layer shown in FIG. 17 or the heat dissipation member 820 and the opposing substrate 150 are configured as one body, the opposing substrate 150 is made of a metal material. It can be divided into a moisture permeation barrier layer (or first metal layer) made of and a heat dissipation layer (or second metal layer) made of a thermally conductive material and laminated on the moisture barrier layer.

The moisture permeation barrier layer is made of the same material as the above-described counter substrate 150 , protects the thin film transistor and the organic light emitting element layer from external impact, and prevents moisture from penetrating into the organic light emitting element layer.

The heat dissipation layer is directly laminated on the front surface of the moisture permeation barrier layer without a medium such as an adhesive layer. In this case, the heat dissipation layer may be directly formed on the front surface of the moisture permeation barrier layer to have a constant thickness by a deposition process, a coating process, or a plating process corresponding to the material.

As described above, in the display device according to the present example, since the heat dissipation member 820 is integrated on the entire rear surface of the display panel 100, vibration caused by driving of the actuator is transmitted to the display panel 100 without reduction, and the bass characteristics are improved, Since heat generated according to the driving of the actuator is more efficiently dissipated, image quality deterioration occurring in the area of the display panel 100 overlapping the actuator may be prevented.

19 is a view for explaining a modified example of the heat dissipation member shown in FIG. 18 , which is configured in a pattern shape of the heat dissipation member shown in FIG. 18 .

Referring to FIG. 19 , the heat dissipation member 820 according to the present example includes a plurality of actuator coupling areas 803 set in each of the central area CA, the left area LA, and the right area RA of the display panel 100 . A plurality of heat dissipation pattern layers 821 , 823 , and 825 directly formed on the rear surface of the opposite substrate 150 to overlap each other may be included.

Each of the plurality of heat dissipation pattern layers 821 , 823 , and 825 may be directly formed on the back surface of the opposite substrate 150 to have a constant thickness while having a relatively wider size than the corresponding actuator coupling region 803 . have.

The heat dissipation member 820 according to an example may be formed of a metal material having high thermal conductivity, such as aluminum (Al), copper (Cu), silver (Ag), or an alloy thereof. As an example, the heat dissipation member 820 may be pattern-formed directly on the back surface of the opposite substrate 150 through a deposition process using a mask, a coating process, or a plating process. As another example, when the heat dissipation member 820 is made of a silver (Ag) material, the heat dissipation member 820 may be patterned directly on the rear surface of the opposite substrate 150 through a printing process using a silver paste. In consideration of thermal conductivity, the heat dissipation member 820 may be made of a silver (Ag) material. In this case, the heat dissipation member 820 may be formed through a printing process in order to reduce the material cost of the heat dissipation member 820 .

Each of the plurality of heat dissipation pattern layers 821 , 823 , and 825 is coupled to a corresponding actuator 210 , 230 , 250 via a double-sided adhesive member.

As described above, in the display device according to the present example, since the heat dissipation member 820 having a plurality of heat dissipation pattern layers 821 , 823 , and 825 is integrated on the entire rear surface of the display panel 100 , vibration caused by driving of the actuator is not reduced. Since it is transmitted to the display panel 100 to improve bass characteristics, and heat generated by driving the actuator is more efficiently dissipated, image quality deterioration occurring in the area of the display panel 100 overlapping the actuator can be prevented.

As described above, according to the present disclosure, the low-pitched sound actuator is disposed in the central region of the display panel, the mid-range sound actuator is disposed in the left region and the right region of the central region, respectively, and the display panel of the region corresponding to each actuator is provided. By vibrating to generate sound, it is possible to provide a display device having excellent acoustic characteristics in a wide sound range.

More specifically, the display device according to the present disclosure includes a low-pitched sound actuator disposed in a central region of a display panel, a mid-range sound actuator disposed in the left region and right region of the central region, respectively, and the central region, the left region, and the central region spatially. It has the effect of realizing excellent bass and stereo sound by including partitions surrounding the central region and the outer portions of each of the left and right regions while dividing into the .

In addition, the display device according to the present disclosure spatially divides the central region, the left region, and the central region, and the shape of the partition surrounding the outer portions of each of the central region and the left and right regions is optimized in association with the position of the actuator, so that it can occur in each region. There is an effect that the deterioration of sound quality characteristics due to the reflected wave or standing wave can be prevented.

In addition, in the display device according to the present disclosure, the height and number of partitions dividing the central region and the left and right regions are optimized, and whether the display panel is adhered to the display panel, etc. have.

In addition, in the display device according to the present disclosure, a heat dissipation member such as a metal plate, a heat dissipation member, or a heat dissipation layer is disposed between the display panel and the actuator, so that the low sound characteristics are improved, and the heat generated by driving the actuator is more efficiently Since heat is dissipated, image quality deterioration occurring in an area of the display panel overlapping the actuator may be prevented.

A display device according to an embodiment of the present disclosure includes a display panel that displays an image, a rear support structure covering a rear surface of the display panel, and a rear support structure provided between the display panel and the rear support structure, wherein the rear surface of the display panel is formed between a central region and a left side of the display panel and a partition dividing the region into a region and a right region, and a sound generating device disposed in each of a central region, a left region, and a right region of the display panel to vibrate the display panel.

In an example of the present disclosure, the sound generating device may have a sound output characteristic in the form of a 2.1 channel.

In an example of the present disclosure, the area of the central region may be greater than the area of the left region or the right region.

In an example of the present disclosure, the sound generating device includes a first actuator vibrating the display panel in the central region, a second actuator vibrating the display panel in the left region, and vibrating the display panel in the right region and a third actuator, wherein a bass limit frequency of the first actuator may be lower than a bass limit frequency of the second actuator or the third actuator.

In an example of the present disclosure, the partition may include a first partition dividing a center area and a left area of the display panel, and a second partition dividing a center area and a right area of the display panel.

In an example of the present disclosure, each of the first partition and the second partition may include a bent portion bent toward the sound generating device.

In an example of the present disclosure, the bent portion may have a pointed shape or a curved shape toward the sound generating device.

In an example of the present disclosure, the sound generating device includes a first actuator vibrating the display panel in the central region, a second actuator vibrating the display panel in the left region, and vibrating the display panel in the right region A third actuator may be included, and the bent portion may be disposed on the same horizontal line as the center of the first actuator.

In an example of the present disclosure, the sound generating device includes a first actuator vibrating the display panel in the central region, a second actuator vibrating the display panel in the left region, and vibrating the display panel in the right region a third actuator, wherein the second actuator has two or more sub-actuators spaced apart from each other in a longitudinal direction of the first partition and arranged side by side, wherein the first partition includes the first actuator and the two or more sub-actuators It may include three bent portions bent toward each.

In an example of the present disclosure, the third actuator has two or more sub-actuators spaced apart from each other along the longitudinal direction of the second partition and arranged in parallel, and the second partition includes the first actuator and the two or more sub-actuators. It may include three bent portions bent toward each.

In an example of the present disclosure, each of the first partition and the second partition may be directly attached to and fixed to the rear support structure and the rear surface of the display panel, respectively.

In an example of the present disclosure, each of the first partition and the second partition may be directly attached to and fixed to the rear support structure, and may be in contact with the rear surface of the display panel in a non-adhesive form.

In an example of the present disclosure, a height of each of the first partition and the second partition may be greater than or equal to a gap between the rear support structure and the display panel.

In an example of the present disclosure, each of the first partition and the second partition may include two or more sub-partitions spaced apart from each other.

In an example of the present disclosure, the partition may further include a third partition surrounding the central area and the outer portions of each of the left and right areas of the display panel.

In an example of the present disclosure, the third partition may include at least one of an adhesive member attached to the rear support structure and a rear surface of the display panel, respectively, and a sealing member surrounding the adhesive member.

In an example of the present disclosure, the sound generating device may be accommodated in a support hole provided in the rear support structure.

The display apparatus according to an embodiment of the present disclosure may further include a metal plate disposed between the rear surface of the display panel and the sound generating device in a central region of the display panel.

In an example of the present disclosure, the sound generating device coupled to the metal plate may generate a low-pitched sound.

In an example of the present disclosure, the metal plate may include at least one exhaust hole.

The display device according to an embodiment of the present disclosure further includes a heat dissipation member attached to a rear surface of the display panel to cover a central region, a left region, and a right region of the display panel, wherein the display panel includes a thin film transistor array substrate and the A pixel array unit provided on a thin film transistor array substrate, and an opposing substrate covering the pixel array unit, wherein the heat dissipation member may be attached to a rear surface of the opposing substrate through an adhesive layer.

In an example of the present disclosure, the heat dissipation member may include a plurality of exhaust holes.

In an example of the present disclosure, a display panel includes a thin film transistor array substrate, a pixel array unit provided on the thin film transistor array substrate , and an opposing substrate covering the pixel array unit, wherein the opposing substrate is a moisture barrier layer made of a metal material. It is disposed on the ground layer and the moisture barrier layer, and includes a heat dissipation layer made of a thermally conductive material, and the sound generating device may vibrate the display panel through the heat dissipation layer.

In an example of the present disclosure, the heat dissipation layer may cover a central area and both a left area and a right area of the display panel.

In an example of the present disclosure, the heat dissipation layer may include a plurality of heat dissipation pattern layers overlapping the sound generating device disposed in each of the central region, the left region, and the right region of the display panel.

The above description and the accompanying drawings are merely illustrative of the technical spirit of the present disclosure, and those of ordinary skill in the art to which the present disclosure pertains to within the scope not departing from the essential characteristics of the present disclosure. Various modifications and variations such as combining, separating, substituting and altering will be possible. Therefore, it is intended to explain, not to limit the technical spirit of the example of the present disclosure, and the scope of the technical spirit of the present disclosure is not limited by these examples. The protection scope of the present disclosure should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present disclosure.

100: display panel 150: counter substrate 200: sound generating device 210, 230, 250: actuator 300: cover bottom 500: middle cabinet 600: partition 610: first partition 630: second partition 650: third partition 652: adhesive member 654: sealing member 800: metal plate 801, 811: exhaust hole 810, 820: heat dissipation member 821, 823, 825: heat dissipation pattern layer