Embedded light guiding apparatus

Embedded light guide

The present invention relates to a light guide apparatus applied to the field of liquid crystal display panels, and more particularly to an embedded light guiding device capable of adjusting a light traveling direction and incorporating a backlight.

The application of the liquid crystal display device is quite extensive, such as a television, a computer screen, a mobile phone or other electronic devices. However, since the liquid crystal of the liquid crystal display device itself does not emit light, it is necessary to use a backlight module to provide a light source to illuminate the liquid crystal molecules. Make it change light and dark. The backlight module can be mainly divided into two types according to the set position, one is an edge-light type backlight module applied to a small-size screen, and the other is a direct-type backlight module applied to a medium-large size screen.

Wherein, the direct type backlight module is as shown in FIG. 1 , and the backlight 20, such as a cold cathode fluorescent tube (CCFL) or a light emitting diode (LED) module, is directly disposed directly under the entire module. The light is emitted upwards and the light is emitted through the diffusion plate 22 and the micro-diffusion sheet 24, and the number of the fluorescent tubes or the number of the light-emitting diodes of the direct-type backlight module is large to provide a large brightness, which is generally applied. In the medium-large size liquid crystal display device, the diffusion plate 22 is a milky white polymer containing light scattered substances, so that part of the light energy emitted by the backlight 20 is absorbed, and the thickness of the diffusion plate 22 is large and occupied. The volume, so the space where the light source is placed must be increased, so that the diffusion effect after the light is emitted to the diffusion plate and the micro-diffusion sheet can be exerted. Taking a commercially available 32-inch LCD TV as an example, the distance h between the diffusion plate 22 and the cold cathode fluorescent tube 20 can reach 23 cm, so the overall thickness or volume of the conventional direct-type backlight module accounts for the entire liquid crystal display device. There is a considerable proportion.

Therefore, in the liquid crystal display device, how to reduce the thickness of the direct type backlight module and maintain good luminance is an important subject. In view of this, the present invention proposes a set of embedded light guiding devices combined with a backlight to improve the above-mentioned defects.

The main purpose of the present invention is to provide an embedded light guiding device which directly integrates the backlight module and the diffusion structure to have a small thickness, thereby making the assembled liquid crystal display device lighter and thinner, and Combined with the lateral light input and the light guide plate application, the light uniformization effect can be simultaneously achieved.

The embedded light guiding device disclosed in the present invention comprises a reflecting plate, a light guiding plate having a first surface and a second surface, wherein the first surface is provided with a plurality of V-shaped grooves, and the light guiding plate The first surface is positioned on the reflector, the recess is closed by the reflector, and at least one side of the light source is disposed in each of the recesses, and the light source emits light toward the second surface through the light guide and the reflector.

Furthermore, a diffusion sheet may be disposed on the second surface, or the second surface may have a specially designed surface structure to allow light to be more uniformly emitted from the second surface.

The purpose of the present invention, or other objects, will become apparent to those of ordinary skill in the art.

The pre-light overview and the following detailed description are examples to further explain the patent claims of this creation.

The present invention discloses an embedded light guiding device, which is equivalent to a combination of side light and direct type design.

Please refer to the second (A) and the second (B) drawings, which are respectively a perspective view and an exploded view of the light guide device combined with the backlight of the present invention, and together with the reference to the second (C) figure, the embedded of the present creation A cross-sectional view of the light guiding device. The embedded light guiding device 30 of the present invention comprises a light guide plate 32, a plurality of side light emitting sources 34 and a reflecting plate 36. The light guide plate 32 has a first surface 321 and a second surface 322. The first surface 321 is provided with a plurality of V-shaped grooves 38. The grooves 38 are spaced apart from each other and have a concave width. The angle of the section of the groove 38 is greater than 0 and less than or equal to 60 degrees; the first surface of the light guide plate 32 is positioned on the reflection plate 36, so that the reflection plate 36 closes the groove 38, and in each groove 38, a light source 34 is disposed. . Please refer to FIG. 3 together for a perspective view of the light guide plate. The material of the light guide plate 32 is selected from the group consisting of optical grade acrylic, high molecular polymer, high molecular carbide, glass or quartz. The light source 34 is exemplified by a cold cathode fluorescent lamp in the figure, and the material of the reflecting plate 36 is a high reflection coefficient material.

Therefore, the light emitted by the light source 34 is transmitted through the light guide plate 32 to the second surface 322, and is reflected by the reflective plate 36 to pass through the light guide plate to the second surface 322, and in order to make the light more uniform, the second The surface 322 may have a specially designed surface structure, or as shown in Fig. 4, a diffusion sheet 40 may be added to the second surface 322 to help the light to be more uniform. Moreover, as shown in FIG. 5, side reflection plates 41 and 42 having high reflection coefficients can be separately disposed on the four sides of the light guide plate 32 to reduce light leakage.

Therefore, the present application can be applied to a liquid crystal display device to provide better and more desirable image quality. For example, the liquid crystal display device 50 of the present application shown in FIG. 6 includes two mutually parallel polarizing plates 521, 522, one. The liquid crystal display panel 54 is located between the two polarizing plates 521 and 522, and is used for displaying a color picture, so that the liquid crystal of the liquid crystal layer of the liquid crystal display panel rotates at an angle to produce a change in brightness and darkness. The embedded light guiding device 30 of the present invention is positioned in the liquid crystal. The display panel 54 and the polarizing plate 522 are disposed below to provide a uniform light to the liquid crystal display panel 54 so that the image can be normally displayed.

Referring to Fig. 7, a cross-sectional view of a light guiding device incorporating the backlight of the above-described light guide plate 56 is applied. The light guiding device 60 includes a light guiding plate 56, a plurality of light emitting diodes 62 and a reflecting plate 64. The first surface 561 of the light guiding plate 56 is located on the reflecting plate 64, so that the reflecting plate 64 closes the groove 58, And in each of the grooves 58, one or a plurality of light emitting diodes 62 are disposed. Therefore, the light emitted by the LED 62 is transmitted through the light guide plate 32 to the second surface 322, and is reflected by the reflector 64 and passed through the light guide plate 32 to the second surface 562, and the light is emitted. Uniformly, the second surface 562 can have a specially designed surface structure, or as shown in FIG. 8, a diffuser 66 can be added to the second surface 562 to help the light to be more uniform. Similarly, as shown in FIG. 9, on the four sides of the light guide plate 56, side reflection plates 67 and 68 having high reflection coefficients can be separately disposed to reduce light leakage.

Therefore, the present application can be applied to a liquid crystal display device to provide better and more desirable image quality. The liquid crystal display device 70 of the present invention, as shown in FIG. 10, includes two mutually parallel polarizing plates 721, 722, a liquid crystal. The display panel 74 is located between the two polarizing plates 721 and 722, and is used for displaying a color picture, so that the liquid crystal of the liquid crystal layer of the liquid crystal display panel rotates at an angle to produce a change in brightness and darkness. The light guiding device 60 of the present combination combined with the backlight is positioned in the liquid crystal. The display panel 74 and the polarizing plate 722 are provided below to provide a uniform light to the liquid crystal display panel 74 so that the image can be normally displayed.

Furthermore, the light guide plate structure used in this creation can be assembled in an integrated manner to facilitate panels of various sizes. As shown in FIG. 11, the light guide plate 80 is composed of a plurality of light guide units 82 arranged in parallel. Each of the light guide units 82 is provided with a full image film 84 on the lower surface thereof, and all the full image sheets 84 are disposed on On the surface of the reflector 86, the light guiding units 82 and their corresponding holograms 84 are arranged neatly on the reflecting plate 86. Each of the two light guiding units 82 is provided with a first beveled surface and a second oblique surface. An angled surface, a first beveled surface and a second beveled surface, which are adjacent to each other between the two adjacent light guiding units 82, respectively form a V-shaped groove 88, and are respectively disposed in each of the accommodating spaces 40. The side-emitting light-emitting diode 90 can also be a cold cathode fluorescent tube. The angle between the first oblique angle surface of each light guiding unit 321 and the second oblique angle surface is 0<θ60 degrees. This embodiment is a light guide plate composed of a plurality of light guiding units, and the rest of the structure is the same as the foregoing embodiment, and thus will not be described herein.

Therefore, the light guide device combined with the backlight disclosed in the present invention integrates the conventional backlight module and the diffusion structure, and the groove structure design of the light guide plate can increase the light exit area and improve the light use efficiency, and the creation does not need traditional diffusion. The board not only saves materials and costs, but also has a thinner thickness. Taking a 32-inch LCD TV as an example, the thickness of the light guide plate of this creation is only about 6~8mm. Therefore, this creation not only provides good brightness of the liquid crystal display device, but also makes the liquid crystal display device lighter and thinner.

The embodiments described above are only for explaining the technical idea and characteristics of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement them according to the scope of the patent. That is, the equivalent changes or modifications made by the people in accordance with the spirit revealed by this creation should still be covered by the scope of the patent of this creation.

<p>20 Backlight</p><p>22Diffuser</p><p>24Micro-diffusion tablets</p><p>30Light guide</p><p>32Light guide plate</p><p>321 first surface</p><p>322 second surface</p><p>34Light source</p><p>36reflector</p><p>38 Groove</p><p>40Diffuser</p><p>41, 42 side reflector</p><p>50Liquid crystal display device</p><p>521, 522 polarizing plate</p><p>54LCD panel</p><p>56Light guide</p><p>561 first surface</p><p>562 second surface</p><p>58 Groove</p><p>60Light guide</p><p>62Lighting diode</p><p>64reflector</p><p>66Diffuser</p><p>67Side reflector</p><p>68 side reflector</p><p>70Liquid crystal display device</p><p>721, 722 polarizing plate</p><p>74LCD panel</p><p>80Light guide</p><p>82Light guide unit</p><p>84All Photos</p><p>86reflector</p><p>88 Groove</p><p>90Lighting diode</p>

FIG. 1 is a schematic cross-sectional view of a conventional direct type backlight module.

Figure 2(A) is a perspective view of the embedded light guiding device of the present invention.

The second (B) is an exploded perspective view of the embedded light guiding device of the present invention.

Figure 2(C) is a schematic cross-sectional view of the embedded light guiding device of the present invention.

The third figure is a three-dimensional structure diagram of the light guide plate of the embedded light guiding device of the present invention.

Figure 4 is a schematic cross-sectional view showing another embodiment of the creation.

Figure 5 is a schematic cross-sectional view showing another embodiment of the creation.

Figure 6 is a schematic diagram of a liquid crystal display device for the authoring application.

Figure 7 is a schematic cross-sectional view of another embedded light guiding device of the present invention.

Figure 8 is a schematic cross-sectional view of another embedded light guiding device of the present invention.

Figure 9 is a schematic cross-sectional view of another embedded light guiding device of the present invention.

Figure 10 is a schematic diagram of a liquid crystal display device for the authoring application.

Figure 11 is a schematic diagram of the light guide plate of the present invention having a plurality of light guiding units.