Dimming and toning circuit

Abstract

The utility model relates to a dimming and color adjusting circuit. A stable power supply is provided for a level output board, a sampling board, a dimming circuit and a voltage stabilization distribution board through a power supply circuit. The level output board receives clock sampling of the sampling board, the level output board sends out pulses with different widths to the peak reduction circuit based on the clock sampling, the peak reduction circuit can reduce the peak value of the pulses, meanwhile, harmonic waves of the pulses can be eliminated, and the accuracy of pulse signals is improved. The peak reduction circuit outputs a pulse signal subjected to peak reduction to the voltage stabilization distribution board, the voltage stabilization distribution board is electrically connected with the dimming circuit and can receive signal feedback of the dimming circuit, and chopping or boosting of the output pulse can be achieved according to the signal feedback of the dimming circuit. And meanwhile, the voltage stabilization distribution board supports output of multiple paths of pulses and supports reception of signal feedback of multiple paths of dimming circuits. And the level output board receives the pulse of the voltage stabilization distribution board and distributes the pulse to the dimming circuit so as to realize flexible adjustment of color temperature and brightness of the light source of the dimming circuit.

Description

Technical Field

[0001] This application relates to the field of light source adjustment circuit technology, and in particular to a dimming and color-adjusting circuit. Background Technology

[0002] In light source adjustment devices, the color temperature and brightness of the light source are often adjusted using pulse width modulation (PWM) technology. Traditional PWM technology struggles to achieve flexible color temperature and brightness adjustment. Flexible color temperature and brightness adjustment would make the light source suitable for information display devices such as light matrices. However, current PWM technology, when applied to information display devices like light matrices, often suffers from problems such as distorted light information expression, short effective operating time of the light source, high power consumption, and increased heat generation due to its inflexibility. Therefore, it is necessary to propose a dimming and color-tuning circuit to address the shortcomings of traditional PWM technology in achieving flexible color temperature and brightness adjustment. Utility Model Content

[0003] Therefore, it is necessary to propose a dimming and color-tuning circuit to address the shortcomings of traditional pulse width modulation technology in achieving flexible adjustment of the color temperature and brightness of light sources.

[0004] This application relates to a dimming and color-tuning circuit, comprising:

[0005] Level output board;

[0006] The sampling board is electrically connected to the level output board;

[0007] The peak reduction circuit is electrically connected to the level output board;

[0008] A voltage regulator distribution board is electrically connected to the level output board, and the voltage regulator distribution board is electrically connected to the peak reduction circuit;

[0009] The dimming circuit is electrically connected to the voltage regulator distribution board, and the dimming circuit is electrically connected to the level output board;

[0010] The power supply circuit is electrically connected to the level output board, the power supply circuit is electrically connected to the sampling board, the power supply circuit is electrically connected to the dimming circuit, and the power supply circuit is electrically connected to the voltage regulator distribution board.

[0011] This application relates to a dimming and color-adjusting circuit that provides a stable power supply to a level output board, a sampling board, a dimming circuit, and a voltage regulator board via a power supply circuit. The level output board receives clock samples from the sampling board and, based on these samples, sends pulses of varying widths to a peak-reduction circuit. This circuit reduces the peak value of the pulses and eliminates harmonics, improving the accuracy of the pulse signal. The peak-reduction circuit outputs the reduced-peak pulse signal to the voltage regulator board, which is electrically connected to the dimming circuit. The voltage regulator board receives signal feedback from the dimming circuit and can chop or boost the output pulses based on this feedback. It also supports multi-channel pulse output and reception of multi-channel dimming circuit signal feedback. The level output board receives the pulses from the voltage regulator board and distributes them to the dimming circuit, enabling flexible adjustment of the color temperature and brightness of the light source. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structural connection of a dimming and color-tuning circuit provided in an embodiment of this application.

[0013] Figure 2 This is a schematic diagram of the circuit principle of a dimming and color-tuning circuit provided in one embodiment of this application.

[0014] Figure 3 This is a schematic diagram of the power supply circuit for a dimming and color-tuning circuit provided in one embodiment of this application.

[0015] Figure label:

[0016] 100 - Level output board; 200 - Sampling board; 210 - Sampling chip; 220 - Decoupling capacitor;

[0017] 230 - Decoupling resistor; 240 - Step-down resistor; 300 - Peak reduction circuit; 310 - First voltage limiting resistor;

[0018] 320 - Second voltage limiting resistor; 330 - First circulating capacitor; 340 - Second circulating capacitor;

[0019] 350 - Circulating resistor; 400 - Voltage regulator board; 410 - Output chip; 500 - Dimming circuit;

[0020] 510 - First branch; 511 - LED; 512 - Electrolytic capacitor; 513 - NPN MOSFET;

[0021] 514 - Buffer inductor; 515 - First buffer resistor; 516 - Second buffer resistor; 517 - Sampling resistor;

[0022] 518 - Zener diode; 519 - Buffer resistor; 521 - Crossover capacitor; 520 - Second branch circuit; 521 - Crossover capacitor; 600 - Power supply circuit. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0024] This application provides a dimming and color-adjusting circuit.

[0025] like Figure 1 As shown in one embodiment of this application, a dimming and color-tuning circuit includes a level output board 100, a sampling board 200, a peak reduction circuit 300, a voltage regulation and distribution board 400, a dimming circuit 500, and a power supply circuit 600.

[0026] The sampling board 200 is electrically connected to the level output board 100.

[0027] The peak reduction circuit 300 is electrically connected to the level output board 100.

[0028] The voltage regulator distribution board 400 is electrically connected to the level output board 100, and the voltage regulator distribution board 400 is electrically connected to the peak reduction circuit 300.

[0029] The dimming circuit 500 is electrically connected to the voltage regulator distribution board 400, and the dimming circuit 500 is electrically connected to the level output board 100.

[0030] The power supply circuit 600 is electrically connected to the level output board 100, the sampling board 200, the dimming circuit 500, and the voltage regulator distribution board 400.

[0031] This embodiment relates to a dimming and color-tuning circuit that provides a stable power supply to a level output board 100, a sampling board 200, a dimming circuit 500, and a voltage regulator board 400 via a power supply circuit 600. The level output board 100 receives clock samples from the sampling board 200 and, based on these clock samples, sends pulses of varying widths to a peak reduction circuit 300. The peak reduction circuit 300 reduces the peak value of the pulses and eliminates harmonics, improving the accuracy of the pulse signal. The peak reduction circuit 300 outputs the reduced-peak pulse signal to the voltage regulator board 400, which is electrically connected to the dimming circuit 500. The voltage regulator board 400 can receive signal feedback from the dimming circuit 500 and can chop or boost the output pulses based on this feedback. Furthermore, the voltage regulator board 400 supports the output of multiple pulses and the reception of multiple signal feedbacks from the dimming circuit 500. The level output board 100 receives the pulses from the voltage regulator distribution board 400 and distributes the pulses to the dimming circuit 500, thereby enabling flexible adjustment of the color temperature and brightness of the light source in the dimming circuit 500.

[0032] like Figure 2 As shown, in one embodiment of this application, the sampling board 200 includes a sampling chip 210, a decoupling capacitor 220, a decoupling resistor 230, and a step-down resistor 240. The first terminal of the sampling chip 210 is electrically connected to the output terminal of the power supply circuit 600. The step-down resistor 240 is electrically connected to the connection link between the first terminal of the sampling chip 210 and the output terminal of the power supply circuit 600. The second terminal of the sampling chip 210 is electrically connected to the sampling terminal of the level output board 100. The decoupling resistor 230 is electrically connected to the connection link between the second terminal of the sampling chip 210 and the sampling terminal of the level output board 100. The third, fourth, and fifth terminals of the sampling chip 210 are all grounded. The decoupling capacitor 220 is electrically connected to the connection link between the sampling terminal of the level output board 100 and the third terminal of the sampling chip 210.

[0033] Specifically, the sampling chip 210 can be an ADJ-R sampling chip 210. The sampling chip 210 is electrically connected to the output terminal of the power supply circuit 600, which can realize the output of the clock sampling signal. The decoupling capacitor 220 and the decoupling resistor 230 can form an RC path, which can achieve noise filtering of the clock sampling signal.

[0034] The clock sampling signal is input to the level output board 100, which can output pulses of different widths.

[0035] like Figure 2As shown, in one embodiment of this application, the peak reduction circuit 300 includes a first voltage-limiting resistor 310 and a second voltage-limiting resistor 320. The first voltage-limiting resistor 310 is electrically connected to the connection link between the level output board 100 and the voltage regulator distribution board 400. The second voltage-limiting resistor 320 is electrically connected to the connection link between the first voltage-limiting resistor 310 and the ground terminal.

[0036] Specifically, the first voltage limiting resistor 310 and the second voltage limiting resistor 320 are electrically connected, and the pulse signal receiving end of the voltage regulator distribution board 400 receives the stepped-down pulse signal.

[0037] The stepped-down pulse signal can be adapted to the working requirements of the voltage regulator distribution board 400.

[0038] like Figure 2 As shown, in one embodiment of this application, the peak reduction circuit 300 further includes a first circulating capacitor 330, a second circulating capacitor 340, and a circulating resistor 350. The circulating resistor 350 is electrically connected to the connection link between the first voltage limiting resistor 310 and the voltage regulator distribution board 400. The first circulating capacitor 330 is electrically connected to the connection link between the first voltage limiting resistor 310 and the ground terminal. The second circulating capacitor 340 is electrically connected to the connection link between the voltage regulator distribution board 400 and the ground terminal.

[0039] Specifically, the first circulating capacitor 330 is positioned between the first voltage-limiting resistor 310 and the ground terminal to remove ripple from the pulse signal. The second circulating capacitor 340 and the circulating resistor 350 form a notch filter RC circuit, thereby achieving stable pulse output.

[0040] like Figure 2 As shown, in one embodiment of this application, the voltage regulator distribution board 400 includes an output chip 410. The dimming circuit 500 includes a first branch 510 and a second branch 520. The circuit structure of the first branch 510 is the same as that of the second branch 520. The first branch 510 is electrically connected to a first portion of the output chip 410. The first portion of the output chip 410 is electrically connected to the level output board 100. The first portion of the output chip 410 is electrically connected to the second circulating capacitor 340. The second branch 520 is electrically connected to a second portion of the output chip 410.

[0041] Specifically, the dimming circuit 500 includes a first branch 510 and a second branch 520, and the dimming circuit 500 can realize the adjustment of multiple LED lights.

[0042] The first branch circuit 510 and the second branch circuit 520 have the same circuit structure, which can realize the adjustment of multiple LED lights. This meets the requirement of LED light matrixing.

[0043] The voltage regulator distribution board 400, based on the output chip 410, can provide a stable pulse signal to the level output board 100.

[0044] like Figure 2 As shown, in one embodiment of this application, the first branch 510 includes an LED 511, an electrolytic capacitor 512, and an NPN MOSFET 513. The power supply circuit 600 is electrically connected to the positive terminal of the LED 511. The negative terminal of the LED 511 is electrically connected to the drain of the NPN MOSFET 513. The source of the NPN MOSFET 513 is grounded. The gate of the NPN MOSFET 513 is electrically connected to the first signal output terminal of the level output board 100. The positive terminal of the electrolytic capacitor 512 is electrically connected to the positive terminal of the LED 511. The negative terminal of the electrolytic capacitor 512 is electrically connected to the negative terminal of the LED 511.

[0045] Specifically, the positive terminal of the LED 511 is electrically connected to the power supply circuit 600, and the positive terminal of the LED is in a high-potential excited state. When the NPN MOSFET 513 is in the on state, the LED can light up. When the NPN MOSFET 513 is in the off state, the LED can return to the excited state.

[0046] In fact, the width of the pulse signal is used to adjust the on / off state of the NPN MOSFET 513. With different pulse widths, a stable pulse signal can achieve flexible adjustment of the color temperature and brightness of the LED 511.

[0047] Electrolytic capacitor 512 is electrically connected to the positive terminal of LED 511, which can regulate the amount of electrons required for the LED to light up, thereby achieving stable and flexible color temperature and brightness adjustment. Simply put, when the required color temperature and brightness are low, the switching process of NPN MOSFET 513 will be disordered. At this time, electrolytic capacitor 512 can receive more electrons or provide more of the stored electrons.

[0048] like Figure 2 As shown, in one embodiment of this application, the first branch 510 further includes a buffer inductor 514, a first buffer resistor 515, and a second buffer resistor 516. The buffer inductor 514 is electrically connected to the connection link between the negative terminal of the LED 511 and the drain of the NPN MOSFET 513. The first buffer resistor 515 is electrically connected to the connection link between the source of the NPN MOSFET 513 and ground. The second buffer resistor 516 is electrically connected to the connection link between the gate of the NPN MOSFET 513 and ground.

[0049] Specifically, the buffer inductor 514 can form an inductor-capacitor loop with the electrolytic capacitor 512, thereby reducing capacitor damage and extending the service life of the entire circuit.

[0050] It is worth mentioning that the inductor and capacitor loop achieves flexible adjustment of the color temperature and brightness of the 511 LED tube through electronic oscillation.

[0051] The level base point can be determined by the first buffer resistor 515 and the second buffer resistor 516. The reverse compensation of the gate of the NPN MOS transistor 513 can be achieved by anchoring the level base point, thereby realizing the flexible adjustment of the color temperature and brightness of the light-emitting LED 511.

[0052] like Figure 2 As shown, in one embodiment of this application, the first branch 510 further includes a sampling resistor 517 and a Zener diode 518. The positive terminal of the Zener diode 518 is electrically connected to the drain of the NPN MOSFET 513. The negative terminal of the Zener diode 518 is electrically connected to the positive terminal of the LED 511. The sampling resistor 517 is electrically connected to the source of the NPN MOSFET 513 and the signal input terminal of the first branch of the output chip 410.

[0053] Specifically, the Zener diode 518 can serve as a buffer path between the inductor 514 and the electrolytic capacitor 512, thereby reducing capacitor damage and extending the overall lifespan of the circuit.

[0054] The sampling resistor 517 is used to feed the signal back to the output chip 410.

[0055] like Figure 2 and Figure 3 As shown, in one embodiment of this application, the first branch 510 further includes a buffer resistor 519 and a cross-line capacitor 521. The buffer resistor 519 is electrically connected to the output terminal of the power supply circuit 600 and the signal output terminal of the first branch of the output chip 410. The cross-line capacitor 521 is electrically connected to the sampling resistor 517 and the signal output terminal of the first branch of the output chip 410. The signal output terminal of the first branch of the output chip 410 is connected to the signal input terminal of the level output board 100.

[0056] Specifically, the buffer resistor 519 is used to pull down the output level of the power supply circuit 600, coupling the level of the power supply circuit 600 with the level of the signal output of the first part of the output chip 410, thereby achieving a stable pulse signal output. The pulse signal of the first part of the output chip 410 is output to the level output board 100.

[0057] More specifically, the cross-line capacitor 521 enables complementary coupling between the feedback level of the dimming circuit 500 and the level of the buffer resistor 519, thus allowing for flexible adjustment of the color temperature and brightness of the light-emitting LED 511. The technical features of the above embodiments can be combined arbitrarily, and the execution order of the method steps is not limited. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this patent application. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A dimming and color-tuning circuit, characterized in that, include: Level output board; The sampling board is electrically connected to the level output board; The peak reduction circuit is electrically connected to the level output board; A voltage regulator distribution board is electrically connected to the level output board, and the voltage regulator distribution board is electrically connected to the peak reduction circuit; The dimming circuit is electrically connected to the voltage regulator distribution board, and the dimming circuit is electrically connected to the level output board; The power supply circuit is electrically connected to the level output board, the power supply circuit is electrically connected to the sampling board, the power supply circuit is electrically connected to the dimming circuit, and the power supply circuit is electrically connected to the voltage regulator distribution board.

2. The dimming and color-tuning circuit according to claim 1, characterized in that, The sampling board includes a sampling chip, a decoupling capacitor, a decoupling resistor, and a step-down resistor; The first end of the sampling chip is electrically connected to the output end of the power supply circuit. The step-down resistor is electrically connected to the connection link between the first terminal of the sampling chip and the output terminal of the power supply circuit. The second terminal of the sampling chip is electrically connected to the sampling terminal of the level output board; The decoupling resistor is electrically connected to the connection link between the second terminal of the sampling chip and the sampling terminal of the level output board; The third, fourth, and fifth terminals of the sampling chip are all grounded. The decoupling capacitor is electrically connected to the connection link between the sampling terminal of the level output board and the third terminal of the sampling chip.

3. The dimming and color-tuning circuit according to claim 2, characterized in that, The peak reduction circuit includes a first voltage limiting resistor and a second voltage limiting resistor; The first voltage-limiting resistor is electrically connected to the connection link between the level output board and the voltage regulator distribution board; The second voltage-limiting resistor is electrically connected to the connection link between the first voltage-limiting resistor and the ground terminal.

4. The dimming and color-tuning circuit according to claim 3, characterized in that, The peak reduction circuit also includes a first circulating capacitor, a second circulating capacitor, and a circulating resistor; The circulating resistor is electrically connected to the connection link between the first voltage limiting resistor and the voltage regulator distribution board; The first circulating capacitor is electrically connected to the connection link between the first voltage limiting resistor and the ground terminal; The second circulating capacitor is electrically connected to the connection link between the voltage regulator distribution board and the ground terminal.

5. The dimming and color-tuning circuit according to claim 4, characterized in that, The voltage regulator distribution board includes an output chip; The dimming circuit includes a first branch and a second branch; The circuit structure of the first branch is the same as that of the second branch; The first branch is electrically connected to the first part of the output chip; The first portion of the output chip is electrically connected to the level output board; The first portion of the output chip is electrically connected to the second circulating capacitor; The second branch is electrically connected to the second part of the output chip.

6. The dimming and color-tuning circuit according to claim 5, characterized in that, The first branch includes an LED, an electrolytic capacitor, and an NPN MOSFET; The power supply circuit is electrically connected to the positive terminal of the LED tube; The negative terminal of the LED is electrically connected to the drain of the NPN MOS transistor. The source of the NPN MOS transistor is grounded; The gate of the NPN MOS transistor is electrically connected to the first signal output terminal of the level output board; The positive terminal of the electrolytic capacitor is electrically connected to the positive terminal of the LED tube; The negative terminal of the electrolytic capacitor is electrically connected to the negative terminal of the light-emitting LED.

7. The dimming and color-tuning circuit according to claim 6, characterized in that, The first branch also includes a buffer inductor, a first buffer resistor, and a second buffer resistor; The buffer inductor is electrically connected to the connection link between the negative terminal of the light-emitting LED and the drain of the NPN MOS transistor. The first buffer resistor is electrically connected to the connection link between the source of the NPN MOS transistor and the ground terminal; The second buffer resistor is electrically connected to the connection link between the gate of the NPN MOS transistor and the ground terminal.

8. The dimming and color-tuning circuit according to claim 7, characterized in that, The first branch also includes a sampling resistor and a Zener diode; The positive terminal of the Zener diode is electrically connected to the drain of the NPN MOS transistor; The negative terminal of the Zener diode is electrically connected to the positive terminal of the LED. The sampling resistor is electrically connected to the source of the NPN MOS transistor and the signal input terminal of the first part of the output chip.

9. The dimming and color-tuning circuit according to claim 8, characterized in that, The first branch also includes a buffer resistor and a cross-line capacitor; The buffer resistor is electrically connected to the output terminal of the power supply circuit and the signal output terminal of the first part of the output chip. The cross-line capacitor is electrically connected to the sampling resistor and the signal output terminal of the first part of the output chip; The signal output terminal of the first part of the output chip is connected to the signal input terminal of the level output board.

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