Led led led driving apparatus lightening apparatus including the same and method for driving led

LED driving device, lighting device including the same, and LED driving method {LED DRIVING APPARATUS, LIGHTENING APPARATUS INCLUDING THE SAME AND METHOD FOR DRIVING LED}

The present disclosure relates to an LED driving device, a lighting device including the same, and an LED driving method. More specifically, it relates to an LED driving device capable of controlling the color temperature and brightness of an LED module, a lighting device including the same, and a method of operating the same..

Light Emitting Diode (LED) is a semiconductor light emitting device that has advantages over light sources such as fluorescent lamps and incandescent lamps in terms of low power consumption, long lifespan, and realization of light in various colors. Based on these advantages, LEDs are used in various lighting devices.

Lighting devices with various color temperatures and brightness, including LEDs, are being developed. Since the color temperature of a lighting device is determined according to the characteristics of the light source, it is difficult to control the color temperature in the lighting device. Additionally, as the usage environment of lighting devices becomes more diverse, there is a need to adjust the color temperature and brightness of lighting devices.

<p>The object of the technical idea of the present disclosure is to provide an LED driving device that can conveniently adjust the color temperature and brightness of an LED module, a lighting device including the same, and an LED driving method.</p>

<p>An LED driving device for driving an LED module including a first LED array and a second LED array having a first color temperature and a second color temperature, respectively, according to an aspect according to the technical idea of the present disclosure, includes a first LED array in the first LED array. A first output circuit for supplying a driving current, a second output circuit for supplying a second driving current to the second LED array, and receiving a first input signal and a second input signal from the outside, and a first output circuit and a second output A first control signal and a second control signal respectively in the circuit It includes a controller that transmits a signal, wherein the controller adjusts the color temperature of the LED module to have a value between the first color temperature and the second color temperature based on the first input signal, and adjusts the brightness of the LED module based on the second input signal. and may include a lookup table containing information about the first control signal and the second control signal corresponding to the first input signal and the second input signal.</p><p>A lighting device according to an aspect according to the technical idea of the present disclosure includes an LED module including a first LED array having a first color temperature and a second LED array having a second color temperature, and each of the first LED array and the second LED array. It includes an LED driving device that provides a first driving current and a second driving current, and the LED driving device receives a first input signal and a second input signal from the outside, and sets a first color temperature and a first color temperature based on the first input signal. to have a value between the second color temperature The color temperature of the LED module can be adjusted, and the brightness of the LED module can be adjusted based on the second input signal.</p><p>An LED driving method for driving an LED module including a first LED array and a second LED array each having a first color temperature and a second color temperature according to an aspect according to the technical idea of the present disclosure includes receiving a first input signal. and adjusting the color temperature of the LED module between the first color temperature and the second color temperature while maintaining brightness, based on the first input signal, wherein the step of adjusting the color temperature of the LED module is included in the LED driving device. lookup Based on the table, the color temperature of the LED module can be adjusted.</p>

<p>The LED driving device, the lighting device including the same, and the LED operating method according to the technical idea of the present disclosure allow the user to independently adjust the color temperature and brightness of the LED module. Since the user can control the color temperature by applying only one signal to the LED driving device, it is easy to control the color temperature of the LED module.</p><p>Additionally, the LED module can be adjusted to emit light with a color temperature other than that of the plurality of LED arrays included in the LED module. Therefore, a user can use the LED driving device, the lighting device including the same, and the LED operating method according to the technical idea of the present disclosure in a lighting device usage environment that requires various color temperatures and brightness.</p>

1 is a block diagram showing a lighting device including an LED driving device according to an embodiment of the present disclosure. Figure 2 is a block diagram simply showing a part of a lighting device according to an embodiment of the present disclosure. Figure 3 is a flowchart showing a method of driving an LED according to an embodiment of the present disclosure, and is a flowchart for explaining a method of adjusting the color temperature of an LED module. Figure 4 is a flowchart showing a method of driving an LED according to an embodiment of the present disclosure, and is a flowchart for explaining a method of adjusting the brightness of an LED module. FIG. 5A is a diagram illustrating a lookup table included in an LED driving device according to an embodiment of the present disclosure. Figure 5b is a waveform diagram showing changes in the first and second control signals output from the controller. FIG. 5C is a flowchart for explaining the step (S210) of generating the first and second control signals of FIG. 3. FIG. 6A is a diagram illustrating a lookup table included in an LED driving device according to an embodiment of the present disclosure. FIG. 6B is a flowchart for explaining the step (S200') of adjusting the brightness of the LED module of FIG. 4. FIG. 7A is a block diagram showing a lighting device including an LED driving device according to an embodiment of the present disclosure. FIG. 7B is a flowchart showing an LED driving method according to an embodiment of the present disclosure, and is for explaining the step of changing the lookup table. Figure 8 is a diagram showing the display unit of the lighting device controller. 9A and 9B are diagrams showing a lookup table included in an LED driving device according to an embodiment of the present disclosure. FIG. 10A is a block diagram showing a lighting device including an LED driving device according to an embodiment of the present disclosure. Figure 10b is a flowchart showing an LED driving method according to an embodiment of the present disclosure. FIG. 11 is a diagram illustrating a lookup table included in an LED driving device according to an embodiment of the present disclosure. Figure 12 is a flowchart showing an LED driving method according to an embodiment of the present disclosure. Figure 13 is a block diagram showing a lighting device including an LED driving device according to an embodiment of the present disclosure. Figure 14 is an exploded perspective view briefly showing a bulb-type lamp as a lighting device according to an embodiment of the present disclosure. Figure 15 is an exploded perspective view schematically showing a lamp including a communication module as a lighting device according to an embodiment of the present disclosure. Figure 16 is a schematic diagram for explaining an indoor lighting control network system.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same components in the drawings, and duplicate descriptions thereof are omitted.

1 is a block diagram showing a lighting device including an LED driving device according to an embodiment of the present disclosure. Figure 2 is a block diagram simply showing a part of a lighting device according to an embodiment of the present disclosure.

Referring to FIG. 1, a lighting device 10 according to an embodiment of the present disclosure may include an LED driving device 100, an LED module 200, and a power supply unit 300. The power supply unit 300 can output commercial AC power.

The LED driving device 100 may include a controller 110, first and second output circuits 120_1 and 120_2, and a rectifier 130. The controller 110 sends a first control signal (CS_1) and a second control signal (CS_2) having a predetermined operating frequency and duty ratio to the first output circuit (120_1) and the second output circuit (120_2), respectively. It may be an integrated circuit (IC) chip that outputs. The rectifier 130 can convert the alternating current output by the power supply unit 300 into direct current.

The controller 110 may receive a first input signal (IN_1C) and a second input signal (IN_2D) from the outside. The controller 110 may include a lookup table 111, and the lookup table 111 may include a first control signal (CS_1) and a second control signal (CS_1) corresponding to the first input signal (IN_1C) and the second input signal (IN_2D). It may include information about the control signal (CS_2). Based on the lookup table 111, the controller 110 generates the first control signal (CS_1) and the second control signal (CS_2) when the first input signal (IN_1C) and the second input signal (IN_2D) are received. can be created. The lookup table 111 will be described in detail later with reference to FIGS. 5A and 6A.

When the first input signal (IN_1C) is received, the controller 110 controls the first control signal (CS_1) and the 2 A control signal (CS_2) can be generated. At this time, the color temperature of the LED module 200 may be within a range between the first color temperature of the first LED array 210 and the second color temperature of the second LED array 220.

In addition, when the second input signal (IN_2D) is received, the controller 110 uses the first control signal (CS_1) and the 2 A control signal (CS_2) can be generated. The maximum brightness of the LED module 200 may be determined according to the maximum brightness of the first LED array 210 and the maximum brightness of the second LED array 220.

The controller 110 generates a first control signal (CS_1) and a second control signal (CS_2) corresponding to the first input signal (IN_1C) of the LED module 200, and then responds to the second input signal (IN_2D). The first control signal (CS_1) and the second control signal (CS_2) can be changed as much as possible. That is, the controller 110 may determine the brightness of the LED module 200 after determining the color temperature of the LED module 200.

The first output circuit 120_1 may receive the first control signal CS_1 from the controller 110. The first output circuit 120_1 may supply a first driving current (I_1) to the first LED array 210 using the direct current output by the rectifier 130. The first output circuit 120_1 may be controlled by the first control signal CS_1, and the first control signal CS_1 may control the magnitude of the first driving current I_1.

The second output circuit 120_2 may receive the second control signal CS_2 from the controller 110. The second output circuit 120_2 may supply a second driving current I_2 to the second LED array 220 using the direct current output from the rectifier 130. The second output circuit 120_2 may be controlled by the second control signal CS_2, and the second control signal CS_2 may control the magnitude of the second driving current I_2.

The first driving current output from each of the first output circuit 120_1 and the second output circuit 120_2 according to the operating frequency and duty ratio of the first control signal CS_1 and the second control signal CS_2. The characteristics of (I_1) and the second driving current (I_2) may be determined. In one embodiment, when the duty ratio of the first control signal (CS_1) and the second control signal (CS_2) increases, the magnitude of the first driving current (I_1) and the second driving current (I_2) increases, and 1 control signal When the duty ratios of (CS_1) and the second control signal (CS_2) decrease, the magnitudes of the first driving current (I_1) and the second driving current (I_2) may decrease.

The first output circuit 120_1 and the second output circuit 120_2 may include DC-DC converter circuits according to various topologies, such as a flyback converter, buck converter, and forward converter.

Referring to FIGS. 1 and 2, the LED module 200 may include a first LED array 210 and a second LED array 220. The first LED array 210 and the second LED array 220 may each include a plurality of LEDs, and the plurality of LEDs may be connected to each other in series or parallel. For example, as shown in FIG. 2, a plurality of first LED elements included in the first LED array 210 and a plurality of second LED elements included in the second LED array 220 are alternately connected to each other. can be placed.

The first LED array 210 and the second LED array 220 may have different color temperatures. That is, the first LED array 210 may have a first color temperature, and the second LED array 220 may have a second color temperature that is higher than the first color temperature. For example, the first LED array 210 may include a plurality of LEDs of warm white color, and the second LED array 220 may include a plurality of LEDs of cool white color.

The first LED array 210 and the second LED array 220 according to the first driving current (I_1) and the second driving current (I_2) supplied to the first LED array 210 and the second LED array 220, respectively.) The color temperature of the LED module 200 including) may change. For example, as the size of the first driving current (I_1) becomes larger than the size of the second driving current (I_2), the LED module 200 is warmed by a plurality of LEDs provided in the first LED array 210. It can have a color temperature close to white. On the other hand, as the size of the second driving current (I_2) becomes larger than the size of the first driving current (I_1), the LED module 200 changes to Cool White by a plurality of LEDs provided in the second LED array 220. It can have a close color temperature.

Additionally, the brightness of the LED module 200 may change depending on the first driving current (I_1) and the second driving current (I_2) supplied to each of the first LED array 210 and the second LED array 220. As the sizes of the first driving current (I_1) and the second driving current (I_2) decrease, the brightness of the LED module 200 decreases, and the sizes of the first driving current (I_1) and the second driving current (I_2) decrease. As the size increases, the brightness of the LED module 200 can increase.

When the user applies the first input signal IN_1C to the lighting device 10 from the outside in order to change the color temperature of the lighting device 10, the controller 110 uses the lookup table 111 to determine the first input signal IN_1C. A first control signal (CS_1) and a second control signal (CS_2) corresponding to the input signal (IN_1C) may be generated. Based on the first control signal (CS_1) and the second control signal (CS_2), the first output circuit (120_1) and the second output circuit (120_2) generate a first driving current (I_1) and a second driving current (I_2)) can be applied to each LED module 200, and the LED module 200 can emit light of a color temperature desired by the user. Therefore, the LED driving device 100 and the lighting device 10 according to the present disclosure maintain the brightness constant and use only the first input signal IN_1C, that is, one signal to the LED driving device 100 and the lighting device (By applying 10), the color temperature of the LED module 200 can be changed. The LED driving device 100 and lighting device 10 according to the present disclosure can be easily used in environments that require various color temperatures.

In addition, when the user applies the second input signal IN_2D to the lighting device 10 from the outside in order to change the brightness of the lighting device 10, the controller 110 uses the lookup table 111 based on the A first control signal (CS_1) and a second control signal (CS_2) corresponding to the second input signal (IN_2D) may be generated. Based on the first control signal (CS_1) and the second control signal (CS_2), the first output circuit (120_1) and the second output circuit (120_2) generate a first driving current (I_1) and a second driving current (I_2), respectively.) can be applied to the LED module 200, and the LED module 200 can emit light of the brightness desired by the user. Therefore, the LED driving device 100 and the lighting device 10 according to the present disclosure maintain the color temperature constant and use only the second input signal IN_2D, that is, one signal. By applying 10), the brightness of the LED module 200 can be changed.

Figure 3 is a flowchart showing a method of driving an LED according to an embodiment of the present disclosure, and is a flowchart for explaining a method of adjusting the color temperature of an LED module.

Referring to FIGS. 1 and 3, the LED driving device 100 may receive a first input signal IN_1C from the outside (S100). The first input signal IN_1C may be a voltage that the user applies to the LED driving device 100 to adjust the color temperature of the lighting device 10. The LED driving device 100 adjusts the color temperature of the LED module 200 between the first color temperature of the first LED array 210 and the second color temperature of the second LED array 220, based on the first input signal IN_1C. can be adjusted (S200).

In order to adjust the color temperature of the LED module 200 (S200), when the first input signal (IN_1C) is received, the controller 110 responds to the first input signal (IN_1C) based on the lookup table 111. The first control signal CS_1 and the second control signal CS_2 may be generated (S210). In order for the LED module 200 to emit light having a predetermined color temperature, it may include information about the first control signal (CS_1) and the second control signal (CS_2) corresponding to the first input signal (IN_1C).

The first output circuit 120_1 may output the first driving current I_1 controlled by the first control signal CS_1 to the first LED array 210 (S220). The first LED array 210 may emit light with a predetermined brightness by the first driving current (I_1).

The second output circuit 120_2 may output the second driving current I_2 controlled by the second control signal CS_2 to the second LED array 220 (S230). The second LED array 220 may emit light with a predetermined brightness by the second driving current (I_2).

The color temperature of the LED module 200 may be adjusted according to the ratio of the brightness of the first LED array 210 and the brightness of the second LED array 220. Accordingly, the color temperature of the LED module 200 can be adjusted according to the characteristics of the first control signal (CS_1) and the second control signal (CS_2). Using this, the controller 110 generates a first control signal (CS_1) and a second control signal (CS_2) corresponding to the first input signal (IN_1C) to adjust the color temperature of the LED module 200 (S200) You can do it. When using the LED driving device 100 according to the present disclosure, the user can adjust the color temperature of the LED module 200 by adjusting the size of the first input signal IN_1C, so the color temperature of the lighting device 10 can be adjusted. It's easy.

Figure 4 is a flowchart showing a method of driving an LED according to an embodiment of the present disclosure, and is a flowchart for explaining a method of adjusting the brightness of an LED module.

Referring to FIGS. 1 and 4, the LED driving device 100 may receive (S100') a second input signal (IN_2D) from the outside. The second input signal IN_2D may be a voltage that the user applies to the LED driving device 100 to adjust the brightness of the lighting device 10. The LED driving device 100 may adjust the brightness of the LED module 200 (S200') based on the second input signal (IN_2D).

In order to adjust the brightness of the LED module 200 (S200'), when the second input signal (IN_2D) is received, the controller 110 adjusts the signal to the second input signal (IN_2D) based on the lookup table 111. The corresponding first control signal (CS_1) and second control signal (CS_2) can be generated. The lookup table 111 provides information about the first control signal (CS_1) and the second control signal (CS_2) corresponding to the second input signal (IN_2D) so that the LED module 200 emits light with a predetermined brightness. may include.

The brightness of the LED module 200 including the first LED array 210 and the second LED array 220 can be adjusted according to the brightness of the first LED array 210 and the brightness of the second LED array 220. there is. Accordingly, the controller 110 can adjust the brightness of the LED module 200 (S200) by generating the first control signal (CS_1) and the second control signal (CS_2) corresponding to the second input signal (IN_2D). there is. Therefore, when using the LED driving device 100 according to the present disclosure, the user can adjust the size of the first input signal IN_1C to adjust the color temperature of the LED module 200, and at the same time, the second input signal (IN_1C) It is convenient because the brightness of the LED module 200 can be adjusted by adjusting the size of IN_2D). It is possible for a user to control the color temperature and brightness of the LED module 200 independently of each other.

FIG. 5A is a diagram illustrating a lookup table included in an LED driving device according to an embodiment of the present disclosure. Figure 5b is a waveform diagram showing changes in the first control signal and the second control signal output from the controller, and shows a case where the duty ratio of the first control signal and the second control signal is 50%. FIG. 5C is a flowchart for explaining the step (S210) of generating the first and second control signals of FIG. 3.

Referring to FIGS. 1 and 5A, the LED module 200 may include a first LED array 210 and a second LED array 220. For example, the first LED array 210 may have a color temperature of 2700K, and the second LED array 220 may have a color temperature of 6500K. Accordingly, the LED driving device 100 can adjust the LED module 200 to have a color temperature between 2700K and 6500K.

The lookup table 111 may include a first lookup table 111_1 including information about the first control signal CS_1 and the second control signal CS_2 corresponding to the first input signal IN_1C. The first lookup table 111_1 may include information about the first control signal CS_1 and the second control signal CS_2 that are different depending on the range of the first input signal IN_1C. The first control signal CS_1 and the second control signal CS_2 may be pulse width modulated (PWM) signals with an adjustable pulse width.

In one embodiment, as shown in FIG. 5A, information about the first control signal (CS_1) and the second control signal (CS_2) includes the duties of the first control signal (CS_1) and the second control signal (CS_2). It could mean rain. Specifically, when the brightness of the LED module 200 is 100%, the color temperature may mean the duty ratio of the first control signal (CS_1) and the duty ratio of the second control signal (CS_2) that are different from each other.

In FIG. 5A, the first lookup table 111_1 is shown to include the color temperature of the LED module 200 according to the first control signal CS_1 and the second control signal CS_2, but is not limited thereto. 1 The color temperature may not be separately stored in the lookup table 111_1.

For example, when the first input signal (IN_1C) has a value of 0V or more and less than 2V, the duty ratio of the first control signal (CS_1) and the duty ratio of the second control signal (CS_2) corresponding to the first input signal (IN_1C) The ratios may be stored in the first lookup table 111_1 to be 100% and 0%, respectively. Accordingly, when the first input signal (IN_1C) of 1V is received by the LED driving device 10, the color temperature of the LED module 200 can be adjusted to 2700K.

As another example, when the first input signal (IN_1C) has a value of 5V or more and less than 6V, the duty ratio of the first control signal (CS_1) and the duty ratio of the second control signal (CS_2) corresponding to the first input signal (IN_1C) The ratios may be stored in the first lookup table 111_1 to be 50% and 50%, respectively. Accordingly, when the first input signal (IN_1C) of 5V is received by the LED driving device 10, the color temperature of the LED module 200 can be adjusted to 4000K. As shown in Figure 5b, when the first input signal (IN_1C) has a value of 5V, the ratio of the high level pulse width for one cycle of the first control signal (CS_1) and the second control signal (CS_2) is It can be created to be 50%.

Alternatively, when the first input signal (IN_1C) has a value of 8V or more and 10V or less, the duty ratio of the first control signal (CS_1) and the duty ratio of the second control signal (CS_2) corresponding to the first input signal (IN_1C) are They may be stored in the first lookup table 111_1 to be 0% and 100%, respectively. Accordingly, when the first input signal (IN_1C) of 9V is received by the LED driving device 10, the color temperature of the LED module 200 can be adjusted to 6500K.

Only the case where the LED module 200 is adjusted to have a color temperature of 2700K, 4000K, and 6500K has been described, but as shown in Figure 5a, the LED module 200 has a color temperature between 2700K and 4000K or a value between 4000K and 6500K. It may have a color temperature of, and for this purpose, information about the first control signal (CS_1) and the second control signal (CS_2) corresponding to the first input signal (IN_1C) may be included in the first lookup table (111_1)..

The first lookup table 111_1 may be configured so that as the value of the first input signal IN_1C increases, the color temperature of the LED module 200 increases. Therefore, as the value of the first input signal (IN_1C) increases, the LED driving device 100 applies the first driving current (I_1) and the second driving current (I_2) to the LED module so that the color temperature of the LED module 200 increases. It can be provided as (200).

However, the first lookup table 111_1 shown in FIG. 5A is illustrative and is merely for illustrating one embodiment of the present disclosure, and is not limited thereto. The range of the first input signal (IN_1C) and the duty ratio of the first control signal (CS_1) and the duty ratio of the second control signal (CS_2) corresponding to the range of the first input signal (IN_1C) are the color temperature that the user wants to use. Settings will be possible depending on. Additionally, the first lookup table 111_1 may be configured so that as the value of the first input signal IN_1C decreases, the color temperature of the LED module 200 increases.

In order for the LED module 200 to have a predetermined color temperature, the duty ratio of the first control signal CS_1 and the second control signal CS_2 must be provided to the first output circuit 120_1 and the second output circuit 120_2. The duty ratio is the color temperature and maximum brightness of the first LED array 210 included in the LED module 200, and the color temperature and maximum brightness of the second LED array 220. Brightness may vary depending on the internal configuration of the LED driving device 100.

In another embodiment, the information about the first control signal (CS_1) and the second control signal (CS_2) stored in the first lookup table (111_1) is the second control signal (CS_1) with respect to the duty of the first control signal (CS_1). This may mean the ratio of the duty ratio of the control signal (CS_2). Therefore, as shown in FIG. 5A, the duty ratio of the first control signal CS_1 and the duty ratio of the second control signal CS_2 are not stored in the first lookup table 111_1, respectively, and the duty ratio of the first control signal CS_1 is not stored in the first lookup table 111_1. Only the ratio value of the duty ratio of the second control signal CS_2 to the duty ratio may be stored.

Referring to FIGS. 1 and 5C, in order to generate (S210) the first control signal (CS_1) and the second control signal (CS_2) corresponding to the first input signal (IN_1C), the controller 110 uses the first input signal (IN_1C). It is possible to check (S211) whether the signal (IN_1C) is within a predetermined range. For example, the predetermined range may mean one of the ranges of the first input signal IN_1C stored in the first lookup table 111_1 of FIG. 5A.

If the first input signal IN_1C is within a predetermined range, the controller 110 may generate a first control signal CS_1 and a second control signal CS_2 corresponding to the predetermined range (S213), The first control signal CS_1 and the second control signal CS_2 may be transmitted to the first output circuit 120_1 and the second output circuit 120_2, respectively.

FIG. 6A is a diagram illustrating a lookup table included in an LED driving device according to an embodiment of the present disclosure. FIG. 6B is a flowchart for explaining the step (S200') of adjusting the brightness of the LED module of FIG. 4.

Referring to FIGS. 1 and 6A, the lookup table 111 is a second lookup table including information about the first control signal (CS_1) and the second control signal (CS_2) corresponding to the second input signal (IN_2D). It may include (111_2). The second lookup table 111_2 may include information about the first control signal CS_1 and the second control signal CS_2 that are different depending on the range of the second input signal IN_2D. The controller 110 may generate the first control signal CS_1 and the second control signal CS_2 based on the second lookup table 111_2.

For example, when the second lookup table 111_2 shown in FIG. 6A is included in the controller 110, if the second input signal IN_2D received by the controller 110 has a value of 0V or more and less than 2V, The controller 110 may generate a first control signal (CS_1) and a second control signal (CS_2) so that the brightness of the LED module 200 is 0%. there is. In addition, when the second input signal (IN_2D) has a value of 4V or more and less than 5V, the controller 110 controls the first control signal (CS_1) and the second control signal (CS_2) so that the brightness of the LED module 200 is 40%.) can be generated, and if the second input signal (IN_2D) has a value of 8V or more and less than 10V, the controller 110 turns on the LED The first control signal CS_1 and the second control signal CS_2 may be generated so that the brightness of the module 200 is 100%.

Only the case where the LED module 200 is adjusted to have brightness of 0%, 40%, and 100% has been described, but as shown in FIG. 6A, the brightness of the LED module 200 is between 0% and 40%. Alternatively, information about the first control signal (CS_1) and the second control signal (CS_2) corresponding to the second input signal (IN_2D) to adjust the value to be between 40% and 100% is stored in the second lookup table (111_2).) can be included.

The second lookup table 111_2 may be configured so that as the value of the second input signal IN_2D increases, the brightness of the LED module 200 increases. Therefore, the LED driving device 100 applies the first driving current (I_1) and the second driving current (I_2) to the LED module so that as the value of the second input signal (IN_2D) increases, the brightness of the LED module 200 increases. It can be provided as (200).

However, the second lookup table 111_2 shown in FIG. 6A is an example, and the range of the second input signal IN_2D and the first control signal CS_1 and the second input signal IN_2D correspond to the range of the second input signal IN_2D. 2 Information about the control signal (CS_2) can be set according to the brightness the user wants to use. Additionally, the second lookup table 111_2 may be configured so that as the value of the second input signal IN_2D decreases, the brightness of the LED module 200 increases.

Referring to FIGS. 1 and 6B, in order to adjust the brightness of the LED module 200 (S200'), the controller 110 checks (S211') whether the second input signal (IN_2D) is within a predetermined range. You can. For example, the predetermined range may mean one of the ranges of the second input signal IN_2D stored in the second lookup table 111_2 of FIG. 6A.

If the second input signal (IN_2D) is within a predetermined range, the controller 110 may generate (S213') a first control signal (CS_1) and a second control signal (CS_2) corresponding to the predetermined range,, the first control signal CS_1 and the second control signal CS_2 may be transmitted to the first output circuit 120_1 and the second output circuit 120_2, respectively.

Referring to FIGS. 1, 5C, and 6B, the LED driving device 100 may receive the first input signal IN_1C and the second input signal IN_2D. Taking the first lookup table 111_1 in FIG. 5A and the second lookup table 111_2 in FIG. 6A as an example, the controller 110 receives a first input signal (IN_1C) of 5V and a second input signal (IN_2D) of 10V.) is received, the controller 110 uses the duty ratio of the first control signal CS_1 and the second control signal based on the first lookup table 111_1 to adjust the color temperature of the LED module 200 to 4000K. The duty ratio of (CS_2) can be adjusted to 50% each. Since the first lookup table 111_1 in FIG. 5A is stored based on when the brightness is 100%, the first control signal CS_1 and the second control signal CS_2 are maintained with the duty ratios each maintained at 50%. It may be transmitted to the first output circuit (120_1) and the second output circuit (120_2). The LED module 200 has a color temperature of 4000K and can emit light with 100% brightness.

As another example, the controller 110 may receive a first input signal (IN_1C) of 5V and a second input signal (IN_2D) of 4V. In order to adjust the color temperature of the LED module 200 to 4000K, the controller 110 uses the duty ratio of the first control signal CS_1 and the second control signal (The duty ratio of CS_2) can be adjusted to 50% each. Thereafter, the controller 110 controls the duty ratio of the first control signal CS_1 and the second control based on the second lookup table 111_2 of FIG. 6A in order to adjust the brightness of the LED module 200 to 40%. The duty ratio of the signal CS_2 can be lowered by a predetermined percentage from 50%. At this time, since the color temperature of the LED module 200 must be maintained at 4000K, the controller 110 maintains the ratio of the duty ratio of the second control signal (CS_2) to the duty ratio of the first control signal (CS_1). You can.

The first control signal (CS_1) and the second control signal (CS_2) readjusted based on the second lookup table 111_2 are transmitted to the first output circuit 120_1 and the second output circuit 120_2, and the first control signal The first driving current (I_1) and the second driving current (I_2), respectively controlled by the signal (CS_1) and the second control signal (CS_2), are supplied to the LED module 200. When provided, the LED module 200 can emit light with a color temperature of 4000K and a brightness of 40%.

That is, when the controller 110 receives the first input signal (IN_1C) and the second input signal (IN_2D), the duty ratio and the first control signal (CS_1) based on the first lookup table (111_1) 2 After determining the duty ratio of the control signal (CS_2), the duty ratio and second control of the first control signal (CS_1) are based on the second lookup table (111_2) The duty ratio of the signal (CS_2) can be readjusted.

FIG. 7A is a block diagram showing a lighting device including an LED driving device according to an embodiment of the present disclosure. FIG. 7B is a flowchart showing an LED driving method according to an embodiment of the present disclosure, and is for explaining the step of changing the lookup table.

Referring to FIG. 7A, a lighting device 10a according to an embodiment of the present disclosure may include an LED driving device 100a and an LED module 200. The LED driving device 100a may include a controller 110a, a first output circuit 120_1, and a second output circuit 120_2.

The LED module 200 may include a first LED array 210 and a second LED array 220. The first LED array 210 may have a first color temperature, and the second LED array 220 may have a second color temperature that is higher than the first color temperature.

The controller 110a may receive a first input signal (IN_1C), a second input signal (IN_2D), and a table change signal (TCS) from the external lighting device controller 20. When the table change signal (TCS) is received, the controller 110a may change the lookup table stored in the controller 110a based on the table change signal (TCS). The lookup table 111a shown in FIG. 7A may mean a lookup table after change.

The controller 110a may include a lookup table 111a, and the lookup table 111a may include a first control signal (CS_1) and a second control signal (CS_1) corresponding to the first input signal (IN_1C) and the second input signal (IN_2D). It may include information about the control signal (CS_2). Based on the lookup table 111a, the controller 110a generates the first control signal (CS_1) and the second control signal (CS_2) when the first input signal (IN_1C) and the second input signal (IN_2D) are received. can be created.

Referring to FIGS. 7A and 7B, in order to change the lookup table stored in the LED driving device 100a, the lighting device controller 20 may generate a table change signal (TCS), and the controller 110a may generate a table change signal (TCS). A table change signal (TCS) may be received (S11) from the controller 20. The table change signal (TCS) may include information about the lookup table 111a after change. The controller 110a may change the lookup table 111a (S13) based on the table change signal (TCS). The LED driving device 100a and the lighting device 10a according to the technical idea of the present disclosure can be used in various environments because the lookup table 111a can be changed as needed.

In one embodiment, when the controller 110a receives the table change signal (TCS), the controller 110a selects a partial range of the first input signal (IN_1C) or a second input signal (IN_2D) that is not used by the user in the lookup table.) may be deleted and a new lookup table 111a may be stored. This will be described later in the description of FIG. 9A.

In another embodiment, when the controller 110a receives the table change signal (TCS), the controller 110a selects the color temperature range of the LED module 200 to be used by the user in a range between the first color temperature and the second color temperature. You can choose. The controller 110a enters a new lookup table 111a containing information about the first control signal (CS_1) and the second control signal (CS_2) corresponding to the first input signal (IN_1C) based on the selected color temperature range. You can save it. This will be described later in the description of FIG. 9B.

Figure 8 is a diagram showing the display unit of the lighting device controller.

Referring to FIGS. 7A and 8, the lighting device controller 20 and the controller 110a may be connected to communicate through a specific communication interface, for example, RS485, USB, Bluetooth, I2C, Ethernet, etc. For example, the lighting device controller 20 may be implemented in mobile devices such as PCs, smartphones, tablets, and laptop computers.

The lighting device controller 20 may include a display unit and an input unit. The display unit outputs information processed by the lighting device controller 20 as visual information that can be recognized by the user. For example, the display unit may display a UI (User Interface).

The input unit generates key input data that the user inputs to control the operation of the lighting device controller 20. The input unit may be composed of a key pad, dome switch, touch pad, jog wheel, jog switch, finger mouse, etc. In particular, when the touch pad forms a layered structure with the display unit, a touch screen may be formed. When the display unit and the input unit form a touch screen, the display unit may also serve as the input unit.

The user can input the color temperature and brightness values of the lighting device 10a that the user wants through the input unit, and the display unit can output the input results as visual information that can be recognized by the user. As shown in Figure 8, it can be seen that the user has currently entered a color temperature of 4000K and a brightness of 100%. When the lighting device 10a includes the first lookup table 111_1 in FIG. 5A and the second lookup table 111_2 in FIG. 6A, the lighting device controller 20 provides the first lookup table 111_2 of 5V, respectively, through a communication interface. The input signal IN_1C and the second input signal IN_2D of 10V can be transmitted to the lighting device 10a.

9A and 9B are diagrams showing a lookup table included in an LED driving device according to an embodiment of the present disclosure.

Referring to FIGS. 7A and 9A, the LED module 200 may include a first LED array 210 and a second LED array 220. For example, the first LED array 210 may have a color temperature of 2700K, and the second LED array 220 may have a color temperature of 6500K. Accordingly, the LED driving device 100a can adjust the LED module 200 to have a color temperature between 2700K and 6500K.

The lookup table 111a may include a first lookup table 111_1a including information about the first control signal CS_1 and the second control signal CS_2 corresponding to the first input signal IN_1C. The first lookup table 111_1a is a change from the first lookup table 111_1 of FIG. 5A.

When the user does not use some of the plurality of available color temperatures of the lighting device 10, the user controls the lighting device controller 20 through the input unit of the lighting device controller 20 to display the table using the lighting device 10. A change signal (TCS) can be output.

For example, when referring to the first lookup table 111_1 of FIG. 5A, a user can use light having a color temperature of 2700K, 3000K, 3500K, 4000K, 5000K, and 6500K using the lighting device 10. As the user does not need light with a color temperature of 3000K or 4000K, the table change signal (TCS) can be transmitted to the lighting device 10 through the lighting device controller 20.

The controller 110a controls a first control signal (CS_1) and a second control signal (CS_2) corresponding to the first input signal (IN_1C) of 2V to 4V and 5V to less than 6V in the first lookup table 111_1 of FIG. 5A.) to change the duty ratio of the first control signal (CS_1) and the duty ratio of the second control signal (CS_2) to 0% by deleting the information about You can.

Figure 9a shows only the first lookup table 111_1a containing information about the first control signal (CS_1) and the second control signal (CS_2) corresponding to the first input signal (IN_1C), but is not limited thereto. no. When the user does not use some of the plurality of available brightnesses of the lighting device 10, the user controls the lighting device controller 20 through the input unit of the lighting device controller 20 to set the table to the lighting device 10. A change signal (TCS) can be output, and a second lookup table including information on the first control signal (CS_1) and the second control signal (CS_2) corresponding to the second input signal (IN_2D) is also a table change signal. It may be changed based on (TCS).

Referring to FIGS. 7A and 9B, the lookup table 111a is a first lookup table including information about the first control signal (CS_1) and the second control signal (CS_2) corresponding to the first input signal (IN_1C). It may include (111_1a'). The first lookup table 111_1a' is a change from the first lookup table 111_1 of FIG. 5A.

When the user does not use some of the plurality of available color temperatures of the lighting device 10, the user controls the lighting device controller 20 through the input unit of the lighting device controller 20 to display the table using the lighting device 10. A change signal (TCS) can be output.

For example, when referring to the first lookup table 111_1 of FIG. 5A, a user can use light having a color temperature of 2700K, 3000K, 3500K, 4000K, 5000K, and 6500K using the lighting device 10. As the user does not need light with a color temperature of 3000K or 4000K, the table change signal (TCS) can be transmitted to the lighting device 10 through the lighting device controller 20.

The controller 110a provides information about the first control signal (CS_1) and the second control signal (CS_2) corresponding to the first input signal (IN_1C) of 2V or more and less than 4V in the first lookup table 111_1 of FIG. 5A. You can change it. For example, the duty ratio of the first control signal (CS_1) and the duty ratio of the second control signal (CS_2) corresponding to the first input signal (IN_1C) of 2V or more and less than 3V range from 70% and 30% to 100%, respectively. and changed to 0%, and the duty ratios of the first control signal (CS_1) and the second control signal (CS_2) corresponding to the first input signal (IN_1C) of 3V or more and less than 4V are 70% and 30%, respectively. You can change it to 60% and 40%. The controller 110a controls the first control signal CS_1 and the second control signal CS_2 corresponding to the first input signal IN_1C of 5V or more and less than 6V in the first lookup table 111_1 of FIG. 5A in the same manner. You can change the information.

Figure 9b shows only the first lookup table 111_1a' including information on the first control signal (CS_1) and the second control signal (CS_2) corresponding to the first input signal (IN_1C), but is limited thereto. That is not the case. When the user does not use some of the plurality of available brightnesses of the lighting device 10, the user controls the lighting device controller 20 through the input unit of the lighting device controller 20 to set the table to the lighting device 10. A change signal (TCS) can be output. The controller 110a creates a second lookup table containing information about the first control signal (CS_1) and the second control signal (CS_2) corresponding to the second input signal (IN_2D) based on the table change signal (TCS). You can change it.

Additionally, FIG. 9B illustrates a first lookup table 111_1a' that is changed when some color temperatures among a plurality of color temperatures available to the user are unnecessary, but the present disclosure is not limited thereto. Even when a color temperature other than a plurality of available color temperatures is needed (in FIG. 9b, a color temperature other than 2700K, 3000K, 3500K, 4000K, 5000K, and 6500K is needed), the user can control the lighting device through the input unit of the lighting device controller 20. By controlling the controller 20, a table change signal (TCS) can be output to the lighting device 10. The controller 110a changes the duty ratio of the first control signal CS_1 and the duty ratio of the second control signal CS_2 corresponding to the first input signal IN_1C based on the table change signal TCS, The first lookup table may be stored so that the LED module 200 can emit light of a new color temperature.

FIG. 10A is a block diagram showing a lighting device including an LED driving device according to an embodiment of the present disclosure. Figure 10b is a flowchart showing an LED driving method according to an embodiment of the present disclosure. FIGS. 10A and 10B are for explaining a case where an existing LED module connected to an LED driving device is changed to a new LED module, or the color temperature and maximum brightness of a plurality of LED arrays included in the LED module are changed.

Referring to FIG. 10A, the LED module 200b may include a first LED array 210b, a second LED array 220b, and a photo sensor 230. The first LED array 210b may have a first color temperature, and the second LED array 220b may have a second color temperature that is higher than the first color temperature. For example, the first LED array 210b may include a plurality of Warm White LEDs, and the second LED array 220b may include a plurality of Cool White LEDs.

The photo sensor 230 can measure the first color temperature and brightness of the first LED array 210b and the second color temperature and brightness of the second LED array 220b. The photo sensor 230 generates signals (CCT_1, CCT_2, DIM_M1) containing information about the measured first color temperature, the second color temperature, the maximum brightness of the first LED array 210b, and the maximum brightness of the second LED array 220b., DIM_M2) can be transmitted to the controller 110b.

When the existing LED module connected to the LED driving device 100b is changed to a new LED module 200b, or the first color temperature of the first LED array 210b connected to the LED driving device 100b, 1 Maximum brightness of LED array 210b. When at least one of the second color temperature of the second LED array 220b and the maximum brightness of the second LED array 220b is different from the existing one, the lighting device controller 20 may generate a calibration request signal (CRS).. However, it is not limited to this, and even when the characteristics of the first LED array and the second LED array included in the existing LED module connected to the LED driving device 100b, that is, color temperature and brightness, change, the lighting device controller (20)) can generate a calibration request signal (CRS), and the LED driving device 100b can perform a calibration operation.

The controller 110b may receive a first input signal (IN_1C), a second input signal (IN_2D), and a calibration request signal (CRS) from the external lighting device controller 20. When the controller 110b receives the calibration request signal (CRS), it can perform a calibration operation to change the lookup table. The controller 110b sends signals (CCT_1, CCT_2, DIM_M1, DIM_M2) containing information about the first color temperature, the second color temperature, the maximum brightness of the first LED array 210b, and the maximum brightness of the second LED array 220b. You can receive it and change the previously stored lookup table. The lookup table 111b shown in FIG. 10A may mean a lookup table after change.

Based on the lookup table 111b, the controller 110b generates the first control signal (CS_1) and the second control signal (CS_2) when the first input signal (IN_1C) and the second input signal (IN_2D) are received. can be created.

10A and 10B, when a new LED module 200b is connected to the LED driving device 100b, the lighting device controller 20 may generate a calibration request signal (CRS), and the controller 110b A calibration request signal (CRS) may be received (S21) from the lighting device controller 20. Accordingly, the controller 110b receives the first color temperature, the second color temperature, the maximum brightness of the first LED array 210b, and the second LED from the external photo sensor 220 in order to change the previously stored lookup table. Signals (CCT_1, CCT_2, DIM_M1, DIM_M2) containing information about the maximum brightness of the array 220b may be received (S23).

In Figure 10a, the photo sensor 220 is shown as being built into the LED module 200b, but it is not limited to this, and the LED module 200b may not include the photo sensor 220, and the controller 110b is the first color temperature, the second color temperature, the maximum brightness of the first LED array 210b, and Signals (CCT_1, CCT_2, DIM_M1, DIM_M2) containing information about the maximum brightness of the second LED array 220b may be received.

The controller 110b controls the first input signal IN_1C and the first input signal IN_1C based on information about the first color temperature, the second color temperature, the maximum brightness of the first LED array 210b, and the maximum brightness of the second LED array 220b. 2 Information about the first control signal (CS_1) and the second control signal (CS_2) corresponding to the input signal (IN_2D) is stored in the lookup table (111b). You can save (S25).

In one embodiment, the controller 110b may select at least one third color temperature having a value between the first color temperature and the second color temperature, corresponding to each of the first color temperature, the second color temperature, and the at least one third color temperature. The first range, second range, and third range of the first input signal IN_1C may be stored in the lookup table 111b. This will be described later in the description of Figure 11.

The LED driving device 100b and the lighting device 10b according to the technical idea of the present disclosure can set the lookup table 111b anew even if the characteristics of the LED module 200b connected to the LED driving device 100b change. Therefore, it can be used in various environments.

FIG. 11 is a diagram illustrating a lookup table included in an LED driving device according to an embodiment of the present disclosure. FIG. 11 is a diagram for explaining the step (S25) of storing in the lookup table of FIG. 10B.

Referring to FIGS. 10A and 11, the LED module 200b may include a first LED array 210b and a second LED array 220b. For example, the first LED array 210b may have a color temperature of 3000K, and the second LED array 220b may have a color temperature of 5000K. The maximum brightness of the first LED array 210b and the second LED array 220b may be the same.

The lookup table 111b included in the controller 110b is a first lookup table 111_1b containing information about the first control signal (CS_1) and the second control signal (CS_2) corresponding to the first input signal (IN_1C).) may include. The first lookup table 111_1b may include information about the first control signal CS_1 and the second control signal CS_2 that are different depending on the range of the first input signal IN_1C.

The controller 110b controls the first color temperature of the first LED array 210b transmitted from the photo sensor 220, the second color temperature of the second LED array 220b, the maximum brightness of the first LED array 210b, and the second Based on the information about the maximum brightness of the LED array 220b, information about the first control signal (CS_1) and the second control signal (CS_2) corresponding to the first input signal (IN_1C) is stored in the first lookup table (111_1b)) can be saved in. Since the first color temperature has a value of 3000K and the second color temperature has a value of 5000K, the controller 110b can form the first lookup table 111_1b in the range between 3000K and 5000K.

For example, the controller 110b can select color temperatures of 3500K and 4000K with values between 3000K and 5000K, and the range of the first input signal (IN_1C) corresponding to each of 3000K, 3500K, 4000K, and 5000K is 0V or more. Less than 2V, more than 2V but less than 5V, It can be set to 5V or more but less than 7V and 7V or more but less than 10V. The controller 110b controls the first output circuit 120_1 and the second output circuit 120_2 to emit light with color temperatures of 3000K, 3500K, 4000K, and 5000K, and a first control signal (CS_1) 2 Information about the control signal (CS_2) can be stored in the lookup table 111b. Information about the first control signal CS_1 and the second control signal CS_2 may be the duty ratio of the first control signal CS_1 and the duty ratio of the second control signal CS_2.

For example, when the first input signal (IN_1C) has a value of 0V or more and less than 2V, the duty ratio of the first control signal (CS_1) and the duty ratio of the second control signal (CS_2) corresponding to the first input signal (IN_1C) The ratios may be stored in the first lookup table 111_1b to be 100% and 0%, respectively. Accordingly, when the first input signal (IN_1C) of 1V is received by the LED driving device 100b, the color temperature of the LED module 200b can be adjusted to 3000K.

As another example, when the first input signal (IN_1C) is a value of 5V or more and less than 7V, the duty ratio of the first control signal (CS_1) and the duty ratio of the second control signal (CS_2) corresponding to the first input signal (IN_1C) The ratios may be stored in the first lookup table 111_1b to be 50% and 50%, respectively. Accordingly, when the first input signal (IN_1C) of 5V is received by the LED driving device 100b, the color temperature of the LED module 200b can be adjusted to 4000K.

Alternatively, when the first input signal (IN_1C) is a value of 7V or more and 10V or less, the duty ratio of the first control signal (CS_1) and the duty ratio of the second control signal (CS_2) corresponding to the first input signal (IN_1C) are They may be stored in the first lookup table 111_1b to be 0% and 100%, respectively. Accordingly, when the first input signal (IN_1C) of 9V is received by the LED driving device 100b, the color temperature of the LED module 200b can be adjusted to 5000K.

The first lookup table 111_1b may be configured so that as the value of the first input signal IN_1C increases, the color temperature of the LED module 200b increases. Based on the first lookup table 111_1b, the controller 110b generates a first control signal CS_1 and the above so that as the value of the first input signal IN_1C increases, the color temperature of the LED module 200b increases. A second control signal (CS_2) may be generated. Therefore, if the user wants to increase the color temperature of the lighting device 10b, the color temperature of the lighting device 10b can be increased by increasing the value of the first input signal IN_1C applied to the LED driving device 100b..

However, the first lookup table 111_1b shown in FIG. 11 is an example, and the range of the first input signal IN_1C and the duty cycle of the first control signal CS_1 corresponding to the range of the first input signal IN_1C The duty ratio of the ratio and the second control signal CS_2 may be set according to the color temperature the user wishes to use. Additionally, the first lookup table 111_1b may be configured so that as the value of the first input signal IN_1C decreases, the color temperature of the LED module 200b increases.

In order for the LED module 200b to have a predetermined color temperature, the duty ratio of the first control signal CS_1 and the second control signal CS_2 must be provided to the first output circuit 120_1 and the second output circuit 120_2. The duty ratio is the color temperature and maximum brightness of the first LED array (210b) included in the LED module (200b) and the second LED array (220b). Color temperature and maximum brightness may vary depending on the internal configuration of the LED driving device 100.

In FIG. 11, the first lookup table 111_1b is shown to include the color temperature of the LED module 200b according to the first control signal CS_1 and the second control signal CS_2, but is not limited thereto. 1 The color temperature may not be separately stored in the lookup table 111_1b.

The lookup table 111b included in the controller 110b includes a second lookup table containing information about the first control signal (CS_1) and the second control signal (CS_2) corresponding to the second input signal (IN_2D). You can do it. The second lookup table may include information about the first control signal CS_1 and the second control signal CS_2 that are different depending on the range of the second input signal IN_2D. The controller 110b responds to the second input signal IN_2D based on information about the maximum brightness of the first LED array 210b and the maximum brightness of the second LED array 220b transmitted from the photo sensor 220. Information about the first control signal (CS_1) and the second control signal (CS_2) may be stored in a second lookup table, and the LED driving device (100b) may control the LED module (200b) based on the second lookup table. Brightness can be adjusted.

Figure 12 is a flowchart showing an LED driving method according to an embodiment of the present disclosure. FIG. 12 is a flowchart explaining the step (S25) of storing in the lookup table of FIG. 10B.

Referring to FIGS. 10A and 12, the controller 110b may receive a calibration request signal (CRS) from the lighting device controller 20 and detect the first LED array 210b from the external photo sensor 220. 1 color temperature, the second color temperature of the second LED array 220b, the maximum brightness of the first LED array 210b, and the second LED Signals (CCT_1, CCT_2, DIM_M1, DIM_M2) containing information about the maximum brightness of the array 220b may be received.

The controller 110b may select a color temperature range to be used in the LED module 200b among the range between the first color temperature and the second color temperature (S25-1). The range of color temperature to be used may be selected based on information stored in the LED driving device 100b. In one embodiment, the range of color temperatures to be used may be selected based on a lookup table before the calibration operation is performed. In another embodiment, if the user does not use some ranges in the range between the first color temperature and the second color temperature, the user may control the lighting device controller 20 through the input of the lighting device controller 20, as shown in FIG. 7A. As described above, the table change signal (TCS) can be output to the LED driving device 100b. The controller 110b may select a range of color temperatures to be used based on the table change signal (TCS).

Based on the range of color temperature to be used, the controller 110b stores information about the first control signal (CS_1) and the second control signal (CS_2) corresponding to the first input signal (IN_1C) in the lookup table (111b) (S25-2) You can do it.

For example, when the first LED array 210b has a color temperature of 3000K and the second LED array 220b has a color temperature of 5000K, the lighting device 10b emits light with a color temperature between 3000K and 5000K. You can. If the user does not need light with a color temperature between 3000K and 3500K and outputs a table change signal (TCS) to the LED driving device 100b, the controller 110b sets the color temperature range to be used in the LED module 200b from 3500K to 5000K. You can select up to. The controller 110b stores information about the first control signal CS_1 and the second control signal CS_2 corresponding to the first input signal IN_1C based on the color temperature range from 3500K to 5000K in the lookup table 111b. It can be saved in.

Figure 12 shows only the case of selecting a range of color temperature, but even if the user does not use some of the plurality of available brightnesses of the lighting device 10b, the controller 110a selects the range of brightness to be used by the user. Information on the first control signal CS_1 and the second control signal CS_2 corresponding to the second input signal IN_2D may be selected and stored in the lookup table 111b based on the range of brightness to be used.

Figure 13 is a block diagram showing a lighting device including an LED driving device according to an embodiment of the present disclosure. Figure 13 is for explaining a case where an existing LED module connected to an LED driving device is changed to a new LED module, or the color temperature and maximum brightness of a plurality of LED arrays included in the LED module are changed.

Referring to FIG. 13, when the first color temperature and maximum brightness of the first LED array 210c connected to the LED driving device 100c and the second color temperature and maximum brightness of the second LED array 220c are different from the existing ones., the lighting device controller 20 may generate a calibration request signal (CRS). The lighting device controller 20 includes information about the first color temperature, the second color temperature, the maximum brightness of the first LED array 210c, and the maximum brightness of the second LED array 220c along with a calibration request signal (CRS). Signals (CCT_1, CCT_2, DIM_M1, DIM_M2) can be transmitted to the controller 110c.

When the controller 110c receives the calibration request signal (CRS) from the lighting device controller 20, the controller 110c may perform a calibration operation to change the lookup table. The controller 110c controls the first input signal IN_1C and the first input signal IN_1C based on information about the first color temperature, the second color temperature, the maximum brightness of the first LED array 210c, and the maximum brightness of the second LED array 220c. 2 Information about the first control signal (CS_1) and the second control signal (CS_2) corresponding to the input signal (IN_2D) may be stored in the lookup table 111c.

In one embodiment, the controller 110c may select at least one third color temperature having a value between the first color temperature and the second color temperature, corresponding to each of the first color temperature, the second color temperature, and the at least one third color temperature. The first range, second range, and third range of the first input signal IN_1C may be stored in the lookup table 111c.

The calibration operation of the controller 110c may be performed similarly to the calibration operation of the controller 110b described above in FIGS. 10A, 10B, 11, and 13.

Based on the lookup table 111c, the controller 110c generates the first control signal (CS_1) and the second control signal (CS_2) when the first input signal (IN_1C) and the second input signal (IN_2D) are received. can be created.

Figure 14 is an exploded perspective view briefly showing a bulb-type lamp as a lighting device according to an embodiment of the present disclosure.

Specifically, the lighting device 4200 may include a socket 4210, a power source 4220, a heat dissipation unit 4230, a light source module 4240, and an optical unit 4250. According to an exemplary embodiment of the present disclosure, the light source module 4240 may include a light-emitting device array, and the power supply unit 4220 may include a light-emitting device driver. The light source module 4240 may be the LED module 200, 200b, 200c of FIGS. 1, 10a, and 13, and the light emitting device driver may be the LED driving device 100 of FIGS. 1, 7a, 10a, and 13. 100a, 100b, 100c).

The socket 4210 may be configured to be replaceable with an existing lighting device. Power supplied to the lighting device 4200 may be applied through the socket 4210. As shown, the power supply unit 4220 may be assembled by being separated into a first power supply unit 4221 and a second power supply unit 4222. The heat dissipation unit 4230 may include an internal heat dissipation unit 4231 and an external heat dissipation unit 4232, and the internal heat dissipation unit 4231 may be directly connected to the light source module 4240 and/or the power source 4220, Through this, heat may be transferred to the external heat dissipation unit 4232. The optical unit 4250 may include an internal optical unit (not shown) and an external optical unit (not shown), and may be configured to evenly distribute light emitted by the light source module 4240.

The light source module 4240 may receive power from the power source 4220 and emit light to the optical unit 4250. The light source module 4240 may include one or more light emitting devices 4241, a circuit board 4242, and a controller 4243, and the controller 4243 may store driving information of the light emitting devices 4241.

Figure 15 is an exploded perspective view schematically showing a lamp including a communication module as a lighting device according to an embodiment of the present disclosure.

Specifically, the difference between the lighting device 4300 according to this embodiment and the lighting device 4200 of FIG. 14 is that a reflector 4310 is included in the upper part of the light source module 4240, and the reflector 4310 reflects the light from the light source. Glare can be reduced by spreading the light evenly to the sides and back.

A communication module 4320 may be mounted on the reflector 4310, and home-network communication may be implemented through the communication module 4320. For example, the communication module 4320 may be a wireless communication module using Zigbee, Wi-Fi, or LiFi, and the lighting device is turned on/off through a smart phone or a wireless controller. You can control lighting installed inside and outside the home, such as (off) and brightness control. In addition, by using the Li-Fi communication module using the visible light wavelength of the lighting device installed inside and outside the home, it is possible to control electronic products and automobile systems inside and outside the home, such as TV, refrigerator, air conditioner, door lock, and automobile.

The reflector 4310 and the communication module 4320 may be covered by a cover part 4330.

Figure 16 is a schematic diagram for explaining an indoor lighting control network system.

The network system 5000 according to an embodiment of the present disclosure may be a complex smart lighting-network system that combines lighting technology using light-emitting devices such as LEDs, Internet of Things (IoT) technology, and wireless communication technology. The network system 5000 can be implemented using various lighting devices and wired and wireless communication devices, and can be implemented using sensors, controllers, communication means, software for network control and maintenance, etc.

The network system 5000 may be applied not only to a closed space defined within a building such as a home or office, but also to an open space such as a park or a street. The network system 5000 may be implemented based on the Internet of Things environment to collect/process various information and provide it to the user. At this time, the LED lamp 5200 included in the network system 5000 receives information about the surrounding environment from the gateway 5100 to control the lighting of the LED lamp 5200 itself, as well as the LED lamp 5200. Based on a function such as visible light communication, it may perform a role such as checking and controlling the operation status of other devices 5300 to 5800 included in the IoT environment.

Referring to FIG. 16, the network system 5000 is connected to enable communication with the gateway 5100 and the gateway 5100 for processing data transmitted and received according to different communication protocols and includes an LED lamp (5200), and a plurality of devices 5300 to 5800 connected to communicate with the gateway 5100 according to various wireless communication methods. To implement the network system 5000 based on the Internet of Things environment, each device 5300 to 5800, including the LED lamp 5200, may include at least one communication module. In one embodiment, the LED lamp 5200 may be connected to communicate with the gateway 5100 by a wireless communication protocol such as WiFi, Zigbee, or LiFi, and for this purpose, at least one lamp communication module 5210 is used. You can have

As described above, the network system 5000 may be applied to an open space such as a street or a park as well as a closed space such as a home or office. When the network system 5000 is applied to a home, a plurality of devices 5300 to 5800 included in the network system 5000 and connected to communicate with the gateway 5100 based on the Internet of Things technology are home appliances 5300., digital door lock (5400), garage door lock (5500), switch for lighting installed on the wall (5600), router (5700) for wireless communication network relay, and mobile devices (5800) such as smartphones, tablets, laptop computers, etc. can do.

In the network system 5000, the LED lamp 5200 uses a wireless communication network (Zigbee, WiFi, LiFi, etc.) installed in the home to check the operating status of various devices (5300 to 5800) or depending on the surrounding environment/situation. The illuminance of the LED lamp (5200) itself can be automatically adjusted. Additionally, devices 5300 to 5800 included in the network system 5000 can be controlled using LiFi communication using visible light emitted from the LED lamp 5200. The LED lamp 5200 includes the LED driving device 100, 100a, 100b, 100c of FIGS. 1, 7A, 10A, and 13 or the lighting device 10 of FIGS. 1, 7A, 10A, and 13. 10a, 10b, 10c) may be included.

First, the LED lamp 5200 is the LED lamp 5200 based on the surrounding environment transmitted from the gateway 5100 through the communication module 5210 for the lamp, or the surrounding environment information collected from the sensor mounted on the LED lamp 5200.) can be adjusted automatically. For example, the lighting brightness of the LED lamp 5200 may be automatically adjusted according to the type of a program being broadcast on the TV 5310 or the brightness of the screen. To this end, the LED lamp 5200 may receive operation information of the television 5310 from the lamp communication module 5210 connected to the gateway 5100. The lamp communication module 5210 may be modularized integrally with a sensor and/or a controller included in the LED lamp 5200.

For example, if the program value aired on a TV program is a human drama, the color temperature of the lighting is lowered to 12000K or lower, for example, 5000K, according to the preset value, and the color is adjusted to create a cozy atmosphere. there is. Conversely, if the program value is a gag program, the network system 5000 can be configured so that the color temperature is raised to 5000K or more and adjusted to blue-based white lighting according to the lighting setting value.

In addition, when a predetermined time elapses after the digital door lock 5400 is locked in a state in which there is no person in the home, all the turned-on LED lamps 5200 are turned off to prevent wastage of electricity. Alternatively, when the security mode is set through the mobile device 5800 or the like, when the digital door lock 5400 is locked while no one is in the home, the LED lamp 5200 may be maintained in the turned-on state.

The operation of the LED lamp 5200 may be controlled according to the surrounding environment collected through various sensors connected to the network system 5000. For example, when the network system 5000 is implemented in a building, the lighting, the location sensor and the communication module are combined in the building to collect the location information of people in the building to turn the lighting on or off, or the collected information is provided in real time to enable efficient use of facility management and idle space. In general, a lighting device such as the LED lamp 5200 is disposed in almost all spaces of each floor in the building, so it collects various information in the building through the sensor provided integrally with the LED lamp 5200, manages the facility, and It can be used for space utilization, etc.

On the other hand, by combining the LED lamp 5200 with an image sensor, a storage device, and a communication module 5210 for the lamp, it can be used as a device capable of maintaining building security or detecting and responding to an emergency situation. For example, when smoke or a temperature sensor is attached to the LED lamp 5200, damage can be minimized by quickly detecting whether a fire has occurred or the like. In addition, it is possible to save energy and provide a comfortable lighting environment by adjusting the brightness of the lighting in consideration of external weather or sunlight.

Above, the present invention has been described in detail with reference to preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications and variations by those of ordinary skill in the art within the spirit and scope of the present invention It can be changed.

10, 10a, 10b, 10c: lighting device 100, 100a, 100b, 100c: LED driving device 200, 200b, 200c: LED module 300: Power unit 110: Controller 120_1, 120_2: First output circuit, second output circuit 130: rectifier 111: lookup table