KR102298569B1 - Apparatus and method for controlling color temperature and illuminance of led device by 2-channel output control - Google Patents

Abstract

The present invention relates to a color temperature and illuminance control device including: a duty ratio determination unit determining a duty ratio for controlling the color temperature of an LED lighting device; a color temperature and illuminance control waveform generating unit generating first and second channel waveforms for controlling the color temperature of the LED lighting device based on the duty ratio determined by the duty ratio determination unit, which generates one of the first and second channel waveforms and then generates the other by inverting the waveform; an illuminance determination unit determining the illuminance of the LED lighting device; a brightness control frequency generating unit generating a brightness control frequency for controlling the brightness of the LED module based on the illuminance determined by the illuminance determination unit; a waveform changing unit multiplying the brightness control frequency by each of the first and second channel waveforms to change the first and second channel waveforms and output first and second changed waveforms so as to simultaneously control the color temperature and the illuminance by channel; and a power supply unit supplying electric power to the LED lighting device based on the first and second changed waveforms. According to the present invention, the output efficiency of a converter is improved, the color temperature and the illuminance are controlled simultaneously, and thus the performance of color temperature and illuminance control can be improved.

Description

Apparatus and method for controlling color temperature and illuminance of LED lighting device by 2-channel output control

The present invention relates to an LED lighting device, and more particularly, to a color temperature of an LED lighting device by two-channel output control for controlling the color temperature and illuminance of an LED lighting device including a plurality of LED modules by two-channel output control. and to an illuminance control device and method therefor.

Since the LED lighting device can be turned on by applying only DC power, the driving circuit is simple compared to the conventional lighting device that requires an igniter. In addition, in the case of an LED lighting device including an LED module composed of two or more LEDs having different color temperatures, a plurality of LED modules can be connected through a power line communication network, and a control command is received from an external terminal connected through a wired/wireless communication network. The brightness and color temperature of each LED can be adjusted.

Accordingly, various technologies for controlling the color temperature and illuminance of the LED lighting device have been developed.

In particular, color temperature is a numerical representation of the color of a light source using absolute temperature. Red light sources have a lower color temperature, and blue light sources have a higher color temperature. Sensitivity increases and concentration improves.

For this reason, the LED lighting device can be used for various functions by adjusting the color temperature according to the purpose of use (eg, sleep, learning, etc.), and various technologies for adjusting the color temperature of the LED lighting device are being developed.

In general, the LED lighting device can adjust the color temperature by controlling the relative ratio of the time each of two or more LEDs emit light. Based on this, a control method using an LED driver or a PWM circuit for controlling a duty ratio of a driving current for each of two or more LEDs is used.

For example, in Korean Patent Registration No. 10-1648788, the first dimming control unit and the second dimming control unit operate by receiving power from one AC-DC converter, but the color temperature and illuminance are controlled by the duty ratio of the PWM signal. An LED lighting device is disclosed.

In such a conventional LED lighting device, when a plurality of channels are connected to one converter, the sum of the outputs of each channel cannot exceed the maximum output of the converter. For example, when a two-channel LED module is connected to a converter with a maximum output of 50W, the output of each of the LED modules cannot exceed 25W.

In addition, when the operating efficiency of the converter is low due to characteristics according to the device or the operating environment of the converter, a converter with an output of 50W or more (eg, a converter with an output of 80W) in order to connect two LED modules with an output of 25W to one converter ) is also used.

Korean Patent No. 10-1648788 (Announcement Date: 2016.08.18)

Therefore, in the present invention, in an LED lighting device using a plurality of channels, the output efficiency of the converter can be improved by generating the other color temperature control waveform using the inverted signal of the color temperature control waveform of any one channel, thereby improving the output efficiency of the converter. An object of the present invention is to provide a color temperature and illuminance control device for an LED lighting device by output control and a method therefor.

In addition, the present invention is a 2-channel capable of improving the color temperature and illuminance control performance of an LED lighting device by simultaneously adjusting the color temperature and illuminance using a signal generated by multiplying a color temperature control signal generated for color temperature control and a frequency set for brightness control. An object of the present invention is to provide a color temperature and illuminance control device for an LED lighting device by output control and a method therefor.

In order to achieve the above object, the color temperature and illuminance control device of the LED lighting device by the two-channel output control provided in the present invention is a 2-channel output control for controlling the color temperature and the illuminance of the LED lighting device including a plurality of LED modules. An LED color temperature and illuminance control device, comprising: a duty ratio determining unit for determining a duty ratio for color temperature control of the LED lighting device; First and second channel waveforms for adjusting the color temperature of the LED lighting device are generated based on the duty ratio determined by the duty ratio determining unit, and after generating any one of the first and second channel waveforms a color temperature and illuminance control waveform generator that inverts the waveform to generate the other waveform; and a power supply for supplying power to the LED lighting device based on the first and second channel waveforms.

Preferably, the color temperature and illuminance control device comprises: an illuminance determining unit for determining the illuminance of the LED lighting device; a brightness control frequency generator for generating a brightness control frequency for controlling the brightness of the LED module based on the illuminance determined by the illuminance determiner; and multiplying each of the first and second channel waveforms by the frequency for controlling brightness, and changing the first and second channel waveforms to simultaneously adjust color temperature and illuminance for each channel to output a first modified waveform and a second modified waveform It may further include a change unit.

Preferably, the color temperature and illuminance adjusting device further comprises a receiving module for receiving a control command for adjusting the color temperature or illuminance of the LED lighting device, and each of the duty ratio determiner and the illuminance determiner is configured through the receiving module. The duty ratio or illuminance may be determined based on the received control command.

Preferably, the receiving module may receive the control command from an external terminal device connected through a wired/wireless communication network including a power line communication network.

Preferably, the power supply unit includes: a first constant current circuit whose on/off is controlled by the first change waveform; and a second constant current circuit whose on/off is controlled by the second change waveform.

On the other hand, in order to achieve the above object, the method for controlling the color temperature and illuminance of an LED lighting device by two-channel output control provided in the present invention is a two-channel color temperature for controlling the color temperature and illuminance of an LED lighting device including a plurality of LED modules. A method for controlling an LED and an illuminance by output control, comprising: a duty ratio determining step of determining a duty ratio for color temperature control of the LED lighting device; First and second channel waveforms for adjusting the color temperature of the LED lighting device are generated based on the duty ratio determined in the duty ratio determining step, and after generating any one of the first and second channel waveforms a color temperature and illuminance control waveform generating step of inverting the waveform to generate the other waveform; and a power supply step of supplying power to the LED lighting device based on the first and second channel waveforms.

Preferably, the method comprises the illuminance determining step of determining the illuminance of the LED lighting device; a brightness control frequency generating step of generating a brightness control frequency for controlling the brightness of the LED module based on the illuminance determined in the illuminance determining step; and a waveform changing step of changing the first and second channel waveforms to simultaneously adjust color temperature and illuminance by multiplying each of the first and second channel waveforms by the brightness control frequency.

Preferably, the method further comprises a receiving step of receiving a control command for adjusting the color temperature or illuminance of the LED lighting device, wherein each of the duty ratio determining step and the illuminance determining step is based on the control command received in the receiving step. Based on this, the duty ratio or the illuminance may be determined.

Preferably, in the receiving step, the control command may be received from an external terminal device connected through a wired/wireless communication network including a power line communication network.

Preferably, the power supply step comprises: a first constant current circuit whose on/off is controlled by the first change waveform; And it is possible to supply power to the LED lighting device through a second constant current circuit whose on/off is controlled by the second change waveform.

The LED lighting device color temperature and illuminance control apparatus and method of the present invention, in an LED lighting device using a plurality of channels, generate the other color temperature control waveform by using an inverted signal of the color temperature control waveform of any one channel By doing so, there is an advantage in that the output efficiency of the converter can be improved. In addition, the present invention has the advantage of improving the color temperature and illuminance control performance of the LED lighting device by simultaneously adjusting the color temperature and illuminance using a signal obtained by multiplying a color temperature control signal generated for color temperature control and a frequency set for brightness control. have.

1 is a schematic block diagram of a color temperature and illuminance control apparatus of an LED lighting device according to an embodiment of the present invention.
2 is a timing diagram for explaining a waveform generated for adjusting the color temperature and illuminance of the LED lighting device according to an embodiment of the present invention.
3 is a schematic flowchart of a method for adjusting color temperature and illuminance of an LED lighting device according to an embodiment of the present invention.
4 is a timing diagram for explaining waveforms generated to express various color temperatures using the color temperature and illuminance control device of the LED lighting device according to an embodiment of the present invention.
5 is a timing diagram illustrating waveforms generated to express various illuminances using the color temperature and illuminance control device of the LED lighting device according to an embodiment of the present invention.
6 is a view showing an example of an actual driving screen of the color temperature and illuminance control device of the LED lighting device according to an embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings, but it will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily practice the present invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. On the other hand, in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification. In addition, even if the detailed description is omitted, descriptions of parts that can be easily understood by those skilled in the art are omitted.

Throughout the specification and claims, when a part includes a certain element, it means that other elements may be further included, rather than excluding other elements, unless otherwise stated.

1 is a schematic block diagram of a color temperature and illuminance control device of an LED lighting device according to an embodiment of the present invention. Referring to FIG. 1 , the color temperature and illuminance adjusting device 100 of the LED lighting device 200 according to an embodiment of the present invention includes a receiving module 110 , a duty ratio determining unit 120 , and a two-channel waveform generating unit ( 130), an illuminance determining unit 140, a brightness control frequency generating unit 150, a waveform changing unit 160, an LED converter 170, and a power supply unit 180, including a color temperature of the LED lighting device 200 Outputs control information for adjustment. In this case, the LED lighting device 200 includes a plurality of LED modules composed of two or more LEDs, and each of the LED modules may be connected through a power line communication network.

The receiving module 110 receives a control command for adjusting the color temperature and illuminance of the LED lighting device 200 , and transmits the result to the duty ratio determiner 120 and the illuminance determiner 140 . In this case, the receiving module 110 may receive the control command from an external terminal device connected through a wired/wireless communication network including a power line communication network or a local area network. On the other hand, the external terminal device may be implemented in various forms, such as a remote control, a portable communication terminal, an operation switch, etc. Color temperature selection information can be transmitted.

The duty ratio determining unit 120 determines a duty ratio for adjusting the color temperature of the LED lighting device 200 . In this case, the duty ratio determiner 120 may determine the duty ratio according to the operation mode determined based on the control command received through the reception module 110 . To this end, the duty ratio determiner 120 may pre-store a duty ratio that can be determined based on the control command, and determine the duty ratio based on the stored information. For example, the duty ratio determiner 120 stores in advance a duty ratio set differently according to the operation mode, such as 90:10 in the learning mode and 80:20 in the sleep mode, and operates determined based on the control command. The duty ratio may be determined according to the mode.

The two-channel waveform generator 130 generates first and second channel waveforms CH1 and CH2 for adjusting the color temperature of the LED lighting device 200 based on the duty ratio determined by the duty ratio determiner 120 . . In this case, the two-channel waveform generator 130 may generate any one of the first and second channel waveforms CH1 and CH2 and then invert the waveform to generate the other waveform. By doing so, the present invention enables efficient use of the converter. That is, according to the present invention, the output of the converter can be doubled by using the other one in the inversion period of one of the plurality of channel waveforms.

The illuminance determiner 140 determines the illuminance of the LED lighting device 200 . In this case, the illuminance determiner 140 may determine the illuminance according to the operation mode determined based on the control command received through the reception module 110 . To this end, the illuminance determiner 140 may pre-store the illuminance that can be determined based on the control command and determine the illuminance based on the stored information. For example, the illuminance determiner 140 pre-stores illuminance information set differently according to the operation mode, such as 700 lux (lx) in the learning mode and 30 lux (lx) in the sleep mode, and according to the control command Thus, the illuminance may be determined according to the determined operation mode.

The brightness control frequency generator 150 generates a brightness control frequency freq. for controlling the brightness of the LED module based on the illuminance determined by the illuminance determiner 140 . In this case, a method of generating a frequency for controlling brightness according to the determined illuminance may use a known technique.

The waveform changing unit 160 includes each of the first and second channel waveforms CH1 and CH2 generated by the two-channel waveform generation unit 130 and the brightness control frequency freq generated by the brightness control frequency generation unit 150 . .) to change the first and second channel waveforms to simultaneously adjust the color temperature and illuminance for each channel, and output the changed waveforms (that is, the first modified waveform CH1_f and the second modified waveform CH2_f) do. That is, the waveform changing unit 160 changes the waveform to express the frequency for brightness control in a section where each of the first and second channel waveforms is 1 (High). For this reason, the present invention can control the color temperature and the illuminance at the same time.

The LED converter 170 receives, converts, and outputs power for driving the color temperature and illuminance control device 100 and the LED lighting device 200 . That is, the LED converter 170 receives AC power, converts it into DC power, and outputs it to the power supply unit 180 . In this case, the LED converter 170 may be included in the color temperature and illuminance control device 100 as illustrated in FIG. 1 , or may be configured as a separate device.

The power supply unit 180 transfers the DC power transferred from the LED converter 170 to the LED lighting device 200 . At this time, the power supply unit 180 includes an LED constant current circuit 1181 whose on/off is controlled by the first modified waveform (CH1_f) and an LED whose on/off is controlled by the second modified waveform (CH2_f). It may include a constant current circuit 2 (182).

Meanwhile, according to another embodiment of the present invention, in the color temperature and illuminance control apparatus 100 illustrated in FIG. 1 , the illuminance determiner 140 , the brightness control frequency generator 150 , and the waveform changer 160 may be omitted. In this case, the power supply unit 180 supplies power to the LED lighting device 200 based on the first and second channel waveforms CH1 and CH2 generated by the two-channel waveform generation unit 130 and To this end, the LED constant current circuit 1 181 is controlled on/off by the first channel waveform CH1, and the LED constant current circuit 2 182 is turned on/off by the second channel waveform CH2. can be controlled.

In addition, in the example of FIG. 1 , the receiving module 110 may be omitted. In this case, the duty ratio determiner 120 and the illuminance determiner 140 determine the duty ratio and the illuminance based on a preset operation program. can

2 is a timing diagram for explaining a waveform generated for color temperature and illuminance control of an LED lighting device according to an embodiment of the present invention. A first channel waveform, (b) of FIG. 2 is a second channel waveform generated by the two-channel waveform generator 130, (c) of FIG. 2 is a frequency for brightness control generated by the frequency generator for brightness control 150; FIG. 2D shows an example of the first changed waveform changed by the waveform changer 160 , and FIG. 2E shows an example of the second changed waveform changed by the waveform changer 160 . Referring to FIG. 2 , the first modified waveform (d) expresses a frequency for brightness control only in a section (Δt1) in which the first channel waveform (a) becomes 1 (High), and the second modified waveform (e) It can be seen that the frequency for brightness control is expressed only in the section Δt2 in which the second channel waveform b becomes 1 (High).

3 is a schematic flowchart of a process for adjusting a color temperature and illuminance of an LED lighting device according to an embodiment of the present invention. Referring to FIGS. 1 and 3 , a method for adjusting color temperature and illuminance of an LED lighting device according to an embodiment of the present invention is as follows.

First, in step S110 , the receiving module 110 receives a control command for adjusting the color temperature and illuminance of the LED lighting device 200 , and transmits the result to the duty ratio determiner 120 and the illuminance determiner 140 . do. In this case, in step S110 , the receiving module 110 may receive the control command from an external terminal device connected through a wired/wireless communication network including a power line communication network or a local area network.

In step S120 , the duty ratio determining unit 120 determines a duty ratio for adjusting the color temperature of the LED lighting device 200 . In this case, the duty ratio determiner 120 may determine the duty ratio according to the operation mode determined based on the control command received in step S110 . To this end, the duty ratio determiner 120 may pre-store a duty ratio that can be determined based on the control command, and determine the duty ratio based on the stored information. For example, the duty ratio determiner 120 stores in advance a duty ratio set differently according to the operation mode, such as 90:10 in the learning mode and 80:20 in the sleep mode, and operates determined based on the control command. The duty ratio may be determined according to the mode.

In step S130, the two-channel waveform generator 130 generates first and second channel waveforms for adjusting the color temperature of the LED lighting device based on the duty ratio determined in step S120. In this case, in step S130, after generating any one of the first and second channel waveforms, the other waveform may be generated by inverting the waveform. By doing so, the present invention enables efficient use of the converter. That is, according to the present invention, the output of the converter can be doubled by using the other one in the inversion period of one of the plurality of channel waveforms.

In step S140 , the illuminance determining unit 140 determines the illuminance of the LED lighting device 200 . In this case, the illuminance determiner 140 may determine the illuminance according to the operation mode determined based on the received control command in step S110 . To this end, the illuminance determiner 140 may pre-store the illuminance that can be determined based on the control command and determine the illuminance based on the stored information. For example, the illuminance determiner 140 pre-stores illuminance information set differently according to the operation mode, such as 700 lux (lx) in the learning mode and 30 lux (lx) in the sleep mode, and based on the control command Thus, the illuminance may be determined according to the determined operation mode.

In step S150, the brightness control frequency generator 150 generates a brightness control frequency for generating a brightness control frequency for controlling the brightness of the LED module based on the illuminance determined in step S140. In this case, a method of generating a frequency for controlling brightness according to the determined illuminance may use a known technique.

In step S160, the waveform changing unit 160 changes the first and second channel waveforms. That is, in step S160 , the waveform changing unit 160 changes the first and second channel waveforms to simultaneously adjust color temperature and illuminance by multiplying each of the first and second channel waveforms by the brightness control frequency. That is, in step S160 , the waveform changing unit 160 generates first and second changed waveforms.

In step S170 , the power supply unit 180 supplies power to the LED lighting device 200 based on the first and second change waveforms generated in step S160 . In particular, in step S170 , the power supply unit 180 includes a first constant current circuit whose on/off is controlled by the first change waveform; And it is possible to supply power to the LED lighting device 200 through a second constant current circuit whose on/off is controlled by the second change waveform.

Meanwhile, according to another embodiment of the present invention, steps S140 to S160 of the method illustrated in FIG. 2 may be omitted. In this case, in step S170, the power supply unit 180 generates the first generated in step S130. and a first constant current circuit for supplying power to the LED lighting device 200 based on a second channel waveform, the on/off being controlled by the first channel waveform; and a second constant current circuit whose on/off is controlled by the second channel waveform may supply power to the LED lighting device.

In addition, in the example of FIG. 2 , step S110 may be omitted, and in this case, steps S120 and S140 may determine a duty ratio and illuminance based on a preset operation program.

4 is a timing diagram for explaining waveforms generated to express various color temperatures using the color temperature and illuminance control device of the LED lighting device according to an embodiment of the present invention, wherein one cycle is 5 ms. , an example of controlling a white LED through channel A and outputting a color temperature control waveform for controlling a yellow LED through channel B is shown. At this time, in FIGS. 4(a) to 4(c), the upper waveform represents the channel A waveform, the lower waveform represents the channel B waveform, and FIG. 4(a) shows a color temperature of 10%. case, FIG. 4(b) shows an example when the color temperature is 50%, and FIG. 4(c) shows an example when the color temperature is 90%.

5 is a timing diagram illustrating waveforms generated to express various illuminances using the color temperature and illuminance control device of the LED lighting device according to an embodiment of the present invention, wherein one cycle is 5 ms. , a color temperature control waveform for controlling a white light LED through channel A and a yellow light LED through channel B is output, but when the color temperature is 50%, a waveform generated to express illuminance is shown. At this time, in FIGS. 5(a) to 5(c), the upper waveform represents the channel A waveform, the lower waveform represents the channel B waveform, and FIG. 5(a) shows the 100% brightness. case, FIG. 5 (b) shows an example when the brightness is 50%, and FIG. 5 (c) shows an example when the brightness is 10%.

6 is a view showing an example of an actual driving screen of the color temperature and illuminance control device of the LED lighting device according to an embodiment of the present invention. 1 and 6 , examples of the first and second change waveforms CH1_f and CH2_f output from the waveform changer 160 when one period is Δt can be seen.

Although embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and the present invention is easily changed from the embodiments by those of ordinary skill in the art to which the present invention pertains and recognized as equivalent. including all changes and modifications to the scope of

100: color temperature and illuminance control device 110: receiving module
120: duty ratio determiner 130: 2-channel waveform generator
140: illuminance determiner 150: frequency generator for brightness control
160: waveform change unit 170: LED converter
180: power supply 200: LED lighting device

Claims (10)

In the color temperature and illuminance control apparatus of an LED lighting device by two-channel output control for adjusting the color temperature and illuminance of the LED lighting device including a plurality of LED modules,
a duty ratio determining unit for determining a duty ratio for color temperature control of the LED lighting device;
First and second channel waveforms for adjusting the color temperature of the LED lighting device are generated based on the duty ratio determined by the duty ratio determiner, and after generating any one of the first and second channel waveforms a two-channel waveform generation unit generating the other waveform by inverting the waveform, and using the other one in an inversion period of any one of the first and second channel waveforms;
an illuminance determining unit for determining the illuminance of the LED lighting device;
a brightness control frequency generator for generating a brightness control frequency for controlling the brightness of the LED module based on the illuminance determined by the illuminance determiner;
The first and second channel waveforms are multiplied by the frequency for controlling the brightness, and the first and second channel waveforms are changed to simultaneously adjust the color temperature and illuminance for each channel, and the first and second modified waveforms are output. wealth; and
A first constant current circuit that supplies power to the LED lighting device based on the first modified waveform and the second modified waveform, the on/off of which is controlled by the first modified waveform, and the second modified waveform Color temperature and illuminance control apparatus of an LED lighting device by two-channel output control, characterized in that it includes a power supply including a second constant current circuit in which /off is controlled. delete According to claim 1,
Further comprising a receiving module for receiving a control command for adjusting the color temperature or illuminance of the LED lighting device,
Each of the duty ratio determiner and the illuminance determiner
A color temperature and illuminance control device for an LED lighting device by two-channel output control, characterized in that the duty ratio or illuminance is determined based on a control command received through the receiving module. The method of claim 3, wherein the receiving module
A color temperature and illuminance control device for an LED lighting device by two-channel output control, characterized in that it receives the control command from an external terminal device connected through a wired/wireless communication network including a power line communication network. delete A method for adjusting the color temperature and illuminance of an LED lighting device by two-channel output control for controlling the color temperature and illuminance of the LED lighting device including a plurality of LED modules, the method comprising:
a duty ratio determining step of determining a duty ratio for color temperature control of the LED lighting device;
First and second channel waveforms for adjusting the color temperature of the LED lighting device are generated based on the duty ratio determined in the duty ratio determining step, and after generating any one of the first and second channel waveforms a two-channel waveform generating step of inverting the waveform to generate the other waveform, and using the other one in an inversion section of any one of the first and second channel waveforms;
an illuminance determining step of determining the illuminance of the LED lighting device;
a brightness control frequency generating step of generating a brightness control frequency for controlling the brightness of the LED module based on the illuminance determined in the illuminance determining step;
The first and second channel waveforms are multiplied by the frequency for controlling the brightness, and the first and second channel waveforms are changed to simultaneously control the color temperature and illuminance for each channel, and the first and second modified waveforms are output. step; and
A first constant current circuit that supplies power to the LED lighting device based on the first modified waveform and the second modified waveform, the on/off of which is controlled by the first modified waveform, and the second modified waveform Color temperature and illuminance control method of an LED lighting device by two-channel output control, comprising the step of supplying power to the LED lighting device through a second constant current circuit in which on/off is controlled. delete 7. The method of claim 6,
Further comprising a receiving step of receiving a control command for adjusting the color temperature or illuminance of the LED lighting device,
Each of the duty ratio determining step and the illuminance determining step
Color temperature and illuminance control method of an LED lighting device by two-channel output control, characterized in that the duty ratio or illuminance is determined based on the control command received in the receiving step. The method of claim 8, wherein the receiving step
A method for adjusting color temperature and illuminance of an LED lighting device by two-channel output control, characterized in that the control command is received from an external terminal device connected through a wired/wireless communication network including a power line communication network. delete

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