RGBW light board control circuit and lighting equipment

Abstract

The present invention discloses an RGBW light panel control circuit and lighting equipment. The RGBW light panel control circuit includes: a main control circuit, which is configured to output a corresponding lighting control signal upon receiving a light panel adjustment trigger signal; a power line, one end of which is connected to the output of the main control circuit; a light panel drive circuit, the input of which is connected to the other end of the power line, and the light panel drive circuit and the main control circuit are connected via power line carrier communication to receive the lighting control signal output by the main control circuit via the power line; the output of the light panel drive circuit is connected to the light panel, and the light panel drive circuit is configured to drive the light panel upon receiving the lighting control signal. The technical solution of the present invention aims to simplify the structure of the RGBW light panel control circuit and reduce production costs.

Description

Technical Field

[0001] The present invention relates to the field of lighting, and in particular to an RGBW lamp panel control circuit and lighting equipment. Background Art

[0002] Currently, the control board and light board of RGBW lamps are mostly connected through power lines, communication lines and ground lines, or there are more lines, which makes the circuit structure complex and the production cost high. Summary of the Invention

[0003] The main purpose of the present invention is to provide an RGBW lamp panel control circuit and a lighting device, aiming to make the structure of the RGBW lamp panel control circuit simpler and reduce the production cost.

[0004] To achieve the above objectives, the present invention proposes an RGBW light panel control circuit comprising:

[0005] A main control circuit, configured to output a corresponding lighting control signal upon receiving a light board adjustment trigger signal;

[0006] A power line, one end of which is connected to an output end of a main control circuit;

[0007] a light board drive circuit, wherein an input end of the light board drive circuit is connected to the other end of the power line, and the light board drive circuit is connected to the main control circuit via the power line carrier communication to receive a light-on control signal output by the main control circuit via the power line;

[0008] The output end of the light board driving circuit is connected to the light board, and the light board driving circuit is used to drive the light board to work when receiving the lighting control signal.

[0009] Optionally, the light board driving circuit includes:

[0010] a pull-down circuit, wherein an input end of the pull-down circuit is connected to an output end of the main control circuit via the power line, and the pull-down circuit is used to pull down a lighting control signal output by the main control circuit and then output it;

[0011] A slave controller, wherein the input end of the slave controller is connected to the output end of the pull-down circuit, and the slave controller is used to receive and control the operation of the light board according to the lighting control signal output after the pull-down circuit is pulled down.

[0012] Optionally, the pull-down circuit includes a first resistor and a first capacitor, the first end of the first resistor and the first end of the first capacitor are connected through the power line, the second end of the first capacitor is connected to the input end of the slave controller, and the second end of the first resistor is grounded.

[0013] Optionally, the light board driving circuit further includes:

[0014] A protection circuit, wherein the input end of the protection circuit is connected to the power line, the output end of the protection circuit is connected to the input end of the slave controller, and the protection circuit is used to step down the voltage output by the main control circuit and output it to the slave controller.

[0015] Optionally, the light board driving circuit further includes:

[0016] A light board identification circuit, wherein the input end of the light board identification circuit is used to connect to a DC power supply, the output end of the light board identification circuit is connected to the input end of the slave controller, and the light board identification circuit is used to divide the DC power supply and output a corresponding voltage division detection signal to the slave controller;

[0017] The slave controller is further configured to drive the light board to operate according to the voltage division detection signal.

[0018] Optionally, the light board identification circuit includes a fourth resistor and a fifth resistor, the first end of the fourth resistor is the input end of the light board identification circuit, the second end of the fourth resistor is the output end of the light board identification circuit and is connected to the first end of the fifth resistor, and the second end of the fifth resistor is grounded.

[0019] Optionally, the main control circuit includes:

[0020] A main controller, configured to output the corresponding lighting control signal upon receiving the light board adjustment trigger signal;

[0021] A switching circuit, wherein the controlled end of the switching circuit is connected to the output end of the main controller, and the output end of the switching circuit is connected to the light board drive circuit carrier communication through the power line. The switching circuit is used to turn on / off when receiving the lighting control signal, and output the corresponding lighting control signal to the light board drive circuit through the power line.

[0022] Optionally, the switching circuit includes a second resistor, a third resistor and a first NMOS transistor, the first end of the second resistor is connected to the output end of the main controller, the second end of the second resistor and the first end of the third resistor are connected to the gate of the first NMOS transistor, and the second end of the third resistor and the source of the first NMOS transistor are grounded.

[0023] Optionally, there are multiple lamp board drive circuits, the output end of each lamp board drive circuit is connected to a lamp board, and each lamp board drive circuit is connected to the main control circuit via the power line carrier communication.

[0024] The present invention further provides a lighting device, comprising the RGBW light board control circuit and the RGBW light board as described above.

[0025] In the technical solution of the present invention, the main control circuit and the light panel drive circuit are connected via a power line, and power carrier communication can be carried out through the power line. When the main control circuit receives a light panel adjustment trigger signal, it outputs a corresponding lighting control signal to the light panel drive circuit via the power line. Upon receiving the lighting control signal, the light panel drive circuit can drive the light panel to operate, changing the color and brightness of the light panel. Transmitting the lighting control signal via the power line can reduce the use of communication lines, thereby reducing the wiring on the circuit board. The present invention aims to simplify the structure of the RGBW light panel control circuit and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0027] Figure 1 This is a functional module diagram of an embodiment of an RGBW light panel control circuit of the present invention;

[0028] Figure 2 This is a functional module diagram of an embodiment of a pull-down circuit in an RGBW light panel control circuit of the present invention;

[0029] Figure 3 This is a functional module diagram of an embodiment of a switch circuit in an RGBW light panel control circuit of the present invention;

[0030] Figure 4 This is a circuit structure diagram of an embodiment of a light board identification circuit in an RGBW light board control circuit of the present invention.

[0031] Description of Figure Numbers:

[0032]

[0033]

[0034] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] The present invention provides an RGBW lamp panel control circuit.

[0039] Reference Figures 1 to 4 In one embodiment of the present invention, the RGBW light panel control circuit includes:

[0040] The main control circuit 10 is used to output a corresponding lighting control signal when receiving a light board adjustment trigger signal;

[0041] A power line L1, one end of which is connected to an output end of the main control circuit 10;

[0042] A light board driving circuit 20, wherein the input end of the light board driving circuit 20 is connected to the other end of the power line L1, and the light board driving circuit 20 is connected to the main control circuit 10 via the power line L1 by carrier communication, so as to receive the lighting control signal output by the main control circuit 10 via the power line L1;

[0043] The output end of the light board driving circuit 20 is connected to the light board, and the light board driving circuit 20 is used to drive the light board to work when receiving the lighting control signal.

[0044] In this embodiment, the light board has multiple light boards of three colors of RGBW, and the multiple light boards are arranged in parallel. The light board driving circuit 20 can control each light board to work independently.

[0045] The main control circuit 10 can be composed of a controller such as a single-chip microcomputer and other electronic components. The single-chip microcomputer in the main control circuit 10 can receive the light board adjustment trigger signal and output the corresponding lighting control signal to the light board drive circuit 20 through the power line L1. The light board adjustment trigger signal can be output to the main control circuit 10 by the user through an infrared remote control, or output to the main control circuit 10 through Bluetooth, WIFI, etc., or the user can output the light board adjustment trigger signal to the main control circuit 10 through a trigger button. Because the main control circuit 10 and the light board drive circuit 20 are connected through the power line L1 and the ground line L2, the power line L1 and the ground line L2 can be the power line L1 and the ground line L2 in the mains circuit, or they can be the wires in the electronic device. The power line L1 in the mains circuit is thicker and has a smaller internal resistance, which can reduce signal loss, but it will increase the difficulty and risk of wiring. It can be selected according to actual conditions and user needs; the main control circuit 10 and the light board drive circuit 20 can communicate through power carrier communication. Power carrier communication is PLC, which is the English name of Power line The abbreviation of Power Line Communication, Power Line Carrier is a communication method unique to the power system. Power Line Carrier Communication refers to the technology of using existing power lines to transmit analog or digital signals at high speed through carrier wave. The transmission of digital signals can adopt various technologies such as voice compression coding, digital time division multiplexing, digital coding modulation, adaptive equalization, echo cancellation, etc. After combining digital communication and power line carrier communication, digital signals can be transmitted through carrier wave, but the cost is higher and can be selected according to actual conditions; the main control circuit 10 transmits analog signals through carrier wave means that the main control circuit 10 can adjust the trigger signal according to the light board and selectively output high and low level signals to represent different The lighting control signal, for example, outputting a low level of 2.4us and a high level of 9.8us represents data bit0, and outputting a low level of 2.4us and a high level of 22us represents data bit1; the light board driving circuit 20 can also be composed of a controller such as a single-chip microcomputer and electronic components. The controller in the light board driving circuit 20 can drive the light board to work according to the electrical signal output by the main control circuit 10 through the power line L1, that is, the lighting control signal. The controller in the light board driving circuit 20 can convert the electrical signal into a digital signal after analog-to-digital conversion, such as 0 or 1, and then control the color change of the light board and the increase or decrease of the brightness of the light board according to the corresponding lighting control signal composed of different 0s and 1s.In the RGBW light board, R, G, B, and W each represent a color. The data format of the W light can be 0x55+0x02+W, while the data format of the R light, G light, and B light is 0x55+0x01+RGB+RGB+RGB+RGB+RGB+RGB+RGB..., and 0x55+0x02 and 0x55+0x01 are boot codes. R, G, B, and W each represent an 8-bit data. One RGB represents three colors of lamp beads in an RGBW light board. Multiple RGBs indicate that there are multiple light board drive circuits 20, and each light board drive circuit 20 is connected to an RGBW light board. The number of RGBs in the data format can be set according to the number of RGBW light boards connected to the light board drive circuit 20 actually connected to the main control circuit 10.

[0046] It can be understood that, because the lamp board driving circuit 20 can convert the electrical signal output by the main control circuit 10 into a digital signal, and then control the color and brightness changes of the lamp beads in the RGBW lamp board through the PWM output method, since R, G, B, and W respectively represent an 8-bit data, 8-bit binary can represent 0 to 256, that is, when the 8-bit binary is 0, the brightness of a certain lamp bead is the lowest, and the lamp bead is off at this time. Therefore, when the color of a certain lamp bead is not needed, the output 8-bit binary is 0; when the 8-bit binary is 256, the brightness is the highest. By outputting different data bit1 and bit0 to form different 8-bit binary numbers, the brightness of a certain lamp bead in the RGBW lamp board can be changed. For example, if the brightness of the W lamp bead is to be changed, the main control circuit 10 can output an electrical signal in the data format corresponding to the W lamp to the lamp board driving circuit 20, and the controller in the lamp board driving circuit 20 can obtain the corresponding data according to the electrical signal. bit1 and bit0 form an 8-bit binary digital signal, and the controller in the lamp board driving circuit 20 then outputs the corresponding PWM signal according to the binary digital signal to adjust the brightness of the W lamp; since the data format of the above-mentioned R lamp, G lamp and B lamp is 0x55+0x01+RGB+RGB+RGB+RGB+RGB+..., RGB represents 24-bit data, the first eight bits represent the R lamp, the middle eight bits represent the G lamp, and the last eight bits represent the B lamp. The controller in the lamp board driving circuit 20 can control the brightness of the R lamp, G lamp and B lamp according to the 24-bit data, and the method of controlling the brightness is the same as that of the above-mentioned W lamp; the controller in the lamp board driving circuit 20 can have four control terminals, which correspond to the four lamp beads in the RGBW lamp board respectively. The controller can output a control signal from one or more control terminals according to the received digital signal representing the lighting control signal to control the brightness change of one or more lamp beads.

[0047] In the technical solution of the present invention, the main control circuit 10 and the light panel drive circuit 20 are connected via a power line L1, and power carrier communication can be performed via the power line L1. When the main control circuit 10 receives a light panel adjustment trigger signal, it outputs a corresponding lighting control signal to the light panel drive circuit 20 via the power line L1. The light panel drive circuit 20 can then drive the light panel to operate upon receiving the lighting control signal, changing the color and brightness of the light panel. Transmitting the lighting control signal via the power line L1 can reduce the use of communication lines, thereby reducing the wiring on the circuit board. The present invention aims to simplify the structure of the RGBW light panel control circuit and reduce production costs.

[0048] In one embodiment, there are multiple lamp board driving circuits 20 , and the output end of each lamp board driving circuit 20 is connected to a lamp board. Each lamp board driving circuit 20 is connected to the main control circuit 10 via the power line L1 for carrier communication.

[0049] In this embodiment, multiple light board driving circuits 20 can be connected to multiple light boards. Multiple light board driving circuits 20 are connected by one main control circuit 10. One main control circuit 10 can realize the function of controlling the brightness changes and color changes of multiple light boards, so that multiple light boards can achieve visual effects such as marquees. It can be applied to a variety of occasions to meet the diverse needs of users. Moreover, one main control circuit 10 is connected to multiple light board driving circuits 20, and there is no need to use multiple communication lines. It only needs to transmit the lighting control signal through the power line L1. The structure is simple and the cost is lower.

[0050] Reference Figures 1 to 4 In one embodiment, the main control circuit 10 includes:

[0051] The main controller 11 is used to output a corresponding lighting control signal when receiving a light board adjustment trigger signal;

[0052] A switching circuit, wherein the controlled end of the switching circuit is connected to the output end of the main controller 11, and the output end of the switching circuit is connected to the light board drive circuit 20 via the power line L1 for carrier communication. The switching circuit is used to turn on / off when receiving the lighting control signal, and output the corresponding lighting control signal to the light board drive circuit 20 via the power line L1.

[0053] In this embodiment, the main controller 11 can be a digital signal processor (DSP), a programmable logic device (PLD), a field programmable gate array (FPGA), a microprocessor, an MCU, or other electronic components. The main controller 11 can receive the light panel adjustment trigger signal input by the user through an infrared remote control and output a corresponding light control signal based on the light panel adjustment trigger signal. The main controller 11 can also receive the light panel adjustment trigger signal input by the user through Bluetooth or WIFI. The switch circuit can be composed of one or more MOS transistors and electronic components such as resistors. The switch circuit can be turned on or off according to the level of the received voltage to output the corresponding light control signal to the light panel drive circuit 20. The specific on or off state of the switch circuit when receiving a high level or a low level can be determined by the selected MOS transistor. In this embodiment, the main control circuit 10 composed of the main control and switch circuits can output the corresponding light control signal to the light panel drive circuit 20 based on the received light panel adjustment trigger signal.

[0054] Reference Figures 1 to 4 In one embodiment, the switching circuit includes a second resistor R2, a third resistor R3 and a first NMOS transistor Q1, a first end of the second resistor R2 is connected to the output end of the main controller 11, a second end of the second resistor R2 and a first end of the third resistor R3 are connected to the gate of the first NMOS transistor Q1, and a second end of the third resistor R3 and a source of the first NMOS transistor Q1 are grounded.

[0055] In this embodiment, the second resistor R2 is a current-limiting resistor, which plays a role in limiting the current size, and can prevent excessive current in the circuit from damaging electrical components in the circuit. The third resistor R3 is a pull-down resistor, which can pull the voltage of the first NMOS gate to ground when the first NMOS tube Q1 is turned off. When the gate of the first NMOS tube Q1 receives a high-level lighting control signal, the first NMOS tube Q1 is turned on, the switching circuit is turned on, and the electrical signal of the main control circuit 10 can be output to the light board drive circuit 20; when the gate of the first NMOS tube Q1 receives a low-level lighting control signal, the first NMOS tube Q1 is turned off, the switching circuit is turned off, and the electrical signal of the main control circuit 10 cannot be output to the light board drive circuit 20, so the switching circuit can be turned on or off according to the specific level of the lighting control signal.

[0056] Reference Figures 1 to 4 In one embodiment, the light board driving circuit 20 includes:

[0057] A pull-down circuit, wherein the input end of the pull-down circuit is connected to the output end of the main control circuit 10 through the power line L1, and the pull-down circuit is used to pull down the lighting control signal output by the main control circuit 10 and then output it;

[0058] The slave controller 21 has an input end connected to an output end of the pull-down circuit. The slave controller 21 is used to receive and control the operation of the light board according to a lighting control signal outputted by the pull-down circuit.

[0059] The pull-down circuit includes a first resistor R1 and a first capacitor C1, the first end of the first resistor R1 and the first end of the first capacitor C1 are connected through the power line L1, the second end of the first capacitor C1 is connected to the input end of the slave controller 21, and the second end of the first resistor R1 is grounded.

[0060] In this embodiment, the pull-down circuit formed by the first capacitor C1 and the first resistor R1 can serve as a discharge circuit when the NMOS transistor in the switching circuit is turned off. When the NMOS transistor is turned off, the first capacitor C1 can discharge the first resistor R1 through the discharge circuit, thereby lowering the voltage level at the input of the slave controller 21, allowing the input of the slave controller 21 to correctly read the low-level electrical signal in a relatively short period of time. Because the low-level duration of the bright light control signal in the above embodiment is very short, the input of the slave controller 21 may not be able to read the low-level electrical signal in such a short period of time, and thus cannot determine data bit 0 and data bit 1, and cannot control the color and brightness of the light panel. The components that can be used by the slave controller 21 can also refer to the main controller 11 in the above embodiment. In this embodiment, the pull-down circuit formed by the first resistor R1 and the first capacitor C1 can pull down the light control signal output by the main control circuit 10, so that the slave controller 21 can read the correct light control signal.

[0061] Reference Figures 1 to 4 In one embodiment, the light board driving circuit 20 further includes:

[0062] The protection circuit has an input end connected to the power line L1 and an output end connected to the input end of the slave controller 21 . The protection circuit is used to step down the voltage output by the main control circuit 10 and output it to the slave controller 21 .

[0063] In this embodiment, the protection circuit can be composed of a sixth resistor R6, a seventh resistor R7, and a first electrostatic protection diode D1. The voltage divider circuit formed by the sixth resistor R6 and the seventh resistor R7 can divide the voltage at the input end of the slave controller 21 to prevent excessive voltage from damaging the I / O port. The first electrostatic protection diode D1 can also prevent the I / O port of the slave controller 21 from being damaged by high voltage. In this embodiment, the protection circuit formed by the sixth resistor R6, the seventh resistor R7, and the first electrostatic protection diode D1 can prevent the I / O port of the slave controller 21 from being damaged by high voltage.

[0064] Reference Figures 1 to 4 In one embodiment, the light board driving circuit 20 further includes:

[0065] A light board identification circuit, wherein the input end of the light board identification circuit is used to connect to a DC power supply V, and the output end of the light board identification circuit is connected to the input end of the slave controller 21. The light board identification circuit is used to divide the DC power supply V and output a corresponding voltage division detection signal to the slave controller 21;

[0066] The slave controller 21 is further configured to drive the light board to operate according to the voltage division detection signal.

[0067] The light board identification circuit includes a fourth resistor R4 and a fifth resistor R5. The first end of the fourth resistor R4 is the input end of the light board identification circuit, the second end of the fourth resistor R4 is the output end of the light board identification circuit, and is connected to the first end of the fifth resistor R5. The second end of the fifth resistor R5 is grounded.

[0068] In this embodiment, the lamp board identification circuit composed of the fourth resistor R4 and the fifth resistor R5 can divide the DC power supply V and output a corresponding voltage division detection signal to the slave controller 21. The slave controller 21 can obtain a specific voltage division voltage value based on the voltage division detection signal, thereby determining whether the lamp board to be lit is the lamp board connected to the lamp board driving circuit 20. For example, when a main control circuit 10 is connected to multiple lamp board control circuits, the resistance value of the fifth resistor R5 in each lamp board control circuit can be set to a different resistance value. When the voltage at the input end of the lamp board identification circuit is the same, the voltage value of the voltage division detection signal received by the slave controller 21 is different. The lamp board connected to the corresponding lamp board control circuit to be controlled can be identified through different voltage division detection signals. In this embodiment, the lamp board identification circuit composed of the fourth resistor R4 and the fifth resistor R5 can enable each lamp board circuit to identify which lamp board control circuit the lighting control signal specifically controls when the main control circuit 10 is connected to multiple lamp board control circuits.

[0069] In one embodiment, the light board driving circuit 20 further includes:

[0070] A power supply circuit, the input end of the power supply circuit is connected to the power line L1, and the output end of the power supply circuit is respectively connected to the input end of the light board identification circuit and the power supply end of the slave controller 21, and the power supply circuit is used to provide working voltage to the light board identification circuit and the slave controller 21.

[0071] In this embodiment, the power supply circuit can be implemented using an LDO chip or a DC-DC circuit. The power supply circuit converts the external power supply voltage into an operating voltage suitable for the slave controller 21 to prevent damage to the slave controller 21 due to a higher operating voltage or malfunction due to a lower operating voltage. The power supply circuit can also provide a DC power supply V to the light board identification circuit.

[0072] The present invention also provides a lighting device.

[0073] In one embodiment, the lighting device includes the RGBW light panel control circuit and the RGBW light panel described above. The specific structure of the RGBW light panel control circuit is similar to that of the above embodiments. Since the lighting device utilizes all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above embodiments, and therefore will not be detailed here.

[0074] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's description and drawings under the technical concept of the present invention, or any direct / indirect application in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A RGBW light board control circuit, wherein the RGBW light board includes four-channel LED lights of R, G, B, and W, characterized in that: The RGBW light board control circuit includes: A main control circuit, which is used to output a lighting control signal corresponding to the RGBW light board channel when receiving an RGBW light board adjustment trigger signal; A power line, one end of which is connected to an output end of a main control circuit; a light board drive circuit, wherein an input end of the light board drive circuit is connected to the other end of the power line, and the light board drive circuit is connected to the main control circuit via the power line carrier communication to receive a light-on control signal output by the main control circuit via the power line; The output end of the light board driving circuit is connected to the RGBW light board. The light board driving circuit has four control terminals, each corresponding to the four lamp beads in the RGBW light board. The light board driving circuit is used to convert the lighting control signal of the corresponding channel output by the main control circuit into a digital signal, and then output the control signal through one or more control terminals in a PWM output mode to control the brightness change of one or more lamp beads; The light board driving circuit includes: a pull-down circuit, wherein an input end of the pull-down circuit is connected to an output end of the main control circuit via the power line, and the pull-down circuit is used to pull down a lighting control signal of a corresponding channel output by the main control circuit and then output it, so that a slave controller can read the lighting control signal of the correct channel; A slave controller, wherein the input end of the slave controller is connected to the output end of the pull-down circuit, and the slave controller is used to receive and convert the lighting control signal of the corresponding channel output after the pull-down circuit is pulled down into a binary digital signal, and then output a corresponding PWM signal according to the binary digital signal, and output a control signal through one or more control ends to control the brightness change of one or more lamp beads in the RGBW light board; A light board identification circuit, wherein the input end of the light board identification circuit is used to connect to a DC power supply, and the output end of the light board identification circuit is connected to the input end of the slave controller. The light board identification circuit is used to divide the DC power supply and then output a corresponding voltage division detection signal to the slave controller; the slave controller is also used to determine whether the RGBW light board that needs to be turned on is the RGBW connected to the light board drive circuit according to the voltage value of the received voltage division detection signal, and identify and drive the corresponding RGBW light board to work through the voltage values ​​of different voltage division detection signals.

2. The RGBW light board control circuit according to claim 1, characterized in that: The pull-down circuit includes a first resistor and a first capacitor, the first end of the first resistor and the first end of the first capacitor are connected through the power line, the second end of the first capacitor is connected to the input end of the slave controller, and the second end of the first resistor is grounded.

3. The RGBW light board control circuit according to claim 1, characterized in that: The light board driving circuit also includes: A protection circuit, wherein the input end of the protection circuit is connected to the power line, the output end of the protection circuit is connected to the input end of the slave controller, and the protection circuit is used to step down the voltage output by the main control circuit and output it to the slave controller.

4. The RGBW light board control circuit according to claim 1, characterized in that: The light board identification circuit includes a fourth resistor and a fifth resistor. The first end of the fourth resistor is the input end of the light board identification circuit, the second end of the fourth resistor is the output end of the light board identification circuit, and is connected to the first end of the fifth resistor. The second end of the fifth resistor is grounded.

5. The RGBW light board control circuit according to claim 1, characterized in that: The main control circuit comprises: A main controller, configured to output the corresponding lighting control signal upon receiving the light board adjustment trigger signal; A switching circuit, wherein the controlled end of the switching circuit is connected to the output end of the main controller, and the output end of the switching circuit is connected to the light board drive circuit carrier communication through the power line. The switching circuit is used to turn on / off when receiving the lighting control signal, and output the corresponding lighting control signal to the light board drive circuit through the power line.

6. The RGBW light board control circuit according to claim 5, characterized in that: The switching circuit includes a second resistor, a third resistor and a first NMOS transistor, the first end of the second resistor is connected to the output end of the main controller, the second end of the second resistor and the first end of the third resistor are connected to the gate of the first NMOS transistor, and the second end of the third resistor and the source of the first NMOS transistor are grounded.

7. The RGBW light board control circuit according to claim 1, characterized in that: There are multiple lamp board drive circuits, and the output end of each lamp board drive circuit is connected to a lamp board. Each lamp board drive circuit is connected to the main control circuit via the power line carrier communication.

8. A lighting device, characterized in that: The lighting device includes the RGBW light board control circuit and the RGBW light board according to any one of claims 1 to 7.

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