Efficient energy-saving safe three-color LED control circuit

Abstract

The utility model relates to the technical field of circuit controllers, and discloses a high-efficiency, energy-saving and safe three-color LED control circuit, which comprises a program control circuit for controlling the long brightness, flicker, breathing flicker, color change and brightness adjustment of a three-color LED by controlling the output of a PWM (Pulse-Width Modulation) signal; the three-loop LED driving circuit is used for providing stable current and voltage for the three-color LED; the short-circuit protection circuit is used for cutting off the power supply in time when the three-color LED is short-circuited; the remote control receiving circuit is used for receiving remote controller signals; a power supply anti-reverse connection protection circuit; a battery anti-reverse connection protection circuit; through the design of the three-loop LED driving circuit, the three-color LED does not share a cathode or an anode, and only has three pins, namely, only three output lines are provided, so that the three-color LED is more convenient to install and control, warm white, pure white and seven colors can be lightened by the three-color LED, and the three colors can be changed into more than ten functional modes through the combination of different modes, so that the three-color LED is more convenient to use. The application range is wider, and practicability and convenience are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of three-color LEDs and their control, and specifically provides an efficient, energy-saving and safe three-color LED control circuit. Background Technique

[0002] A three-color LED, namely an RGB LED, is a light source composed of LED chips of three colors: red (Red), green (Green), and blue (Blue). It can mix lights of various colors and brightness by controlling the different proportions and intensities of the lights of these three colors, so as to achieve rich color transformation effects.

[0003] The three-color LED can control the state of the three-color LED through a remote control device or network connection. An operator can change the color and brightness of the light through a remote controller, wireless communication, or Internet connection.

[0004] After retrieval, the patent with the application number CN202021233533.1 discloses a lighting control circuit for an RGB three-color LED lamp, which includes a main control chip of model PIC18F87J50. The 27th, 28th, 29th, 30th, 33rd, and 34th pins of the main control chip are each connected to a lamp control unit circuit, and each lamp control unit circuit is connected to an LED lamp bead. This utility model controls the conduction of the MOS tube through a simple triode to control the on / off of different basic color lamp beads in the RGB, adjusts the current of different basic color lamp beads in the RGB by changing the PWM parameters, thereby combining to change the color of the light, and changes the PWM parameters through a simple 485 communication protocol, thereby directly changing the brightness and color of the light with a communication message; this control method is simple and practical, with low cost, and is applicable to various lighting control occasions.

[0005] The current three-color LEDs on the market either have a common cathode or a common anode with four pins, and four wires are required for the output. Moreover, compared with the H-bridge circuit driving method of the traditional two-color LED control circuit, the two-color lamp can only emit warm white + seven-color two colors, and the two-color plus mode can only provide nine function modes. Therefore, we need to propose an efficient, energy-saving and safe three-color LED control circuit. Summary of the Invention

[0006] The purpose of the utility model is to provide an efficient, energy-saving and safe three-color LED control circuit. Through the design of a three-loop LED drive circuit, this three-color LED neither has a common cathode nor a common anode, and has only three pins, that is, only three output wires, which is more convenient for installation and control. Moreover, the three-color LED can light up three colors: warm white, pure white, and seven colors. Through the combination of different modes of these three colors, more than a dozen function modes can be changed, with a wider application range and more convenient practical use, so as to solve the problems raised in the above background technique.

[0007] To achieve the above object, the present utility model provides the following technical solutions: An efficient energy-saving and safe three-color LED control circuit, comprising:

[0008] A program control circuit that controls the long lighting, flashing, breathing flash, color change, and brightness adjustment of the three-color LED by controlling the output of the PWM signal;

[0009] A three-loop LED drive circuit that provides stable current and voltage for the three-color LED;

[0010] A short-circuit protection circuit that cuts off the power supply in time when a short circuit occurs in the three-color LED;

[0011] A remote control receiving circuit for receiving remote control signals;

[0012] A power supply reverse connection protection circuit that prevents damage to circuit components when the power supply polarity is reversed;

[0013] A battery reverse connection protection circuit that prevents damage to the battery when the battery polarity is reversed;

[0014] The short-circuit protection circuit is electrically connected to the three-loop LED drive circuit, and the three-loop LED drive circuit, the short-circuit protection circuit, the remote control receiving circuit, the power supply reverse connection protection circuit, and the battery reverse connection protection circuit are all electrically connected to the program control circuit.

[0015] Preferably, the program control circuit includes a chip U1. The 1st pin of the chip U1 is connected to the positive pole of the 5V power supply. A crystal oscillator X1 and a resistor R17 are connected between the 2nd pin and the 3rd pin of the chip U1. A capacitor C7 and a capacitor C8 connected in series are connected in parallel at both ends of the crystal oscillator X1. A light-emitting diode LED and a resistor R1 are connected between the 1st pin and the 4th pin of the chip U1. A switch SW grounded is connected to the 7th pin of the chip U1.

[0016] Preferably, the three-loop LED drive circuit includes MOS transistors Q1, Q2, Q3, Q4, and Q5. A light-emitting diode CW and a light-emitting diode W connected in parallel are connected between the connection terminals of the source electrode of the MOS transistor Q1 and the drain electrode of the MOS transistor Q2 and the connection terminals of the source electrode of the MOS transistor Q3 and the drain electrode of the MOS transistor Q4. A light-emitting diode RGBY is connected between the source electrode of the MOS transistor Q5 and the connection terminals of the source electrode of the MOS transistor Q3 and the drain electrode of the MOS transistor Q4. The drain electrode of the MOS transistor Q5 is connected to the 1st pin of the chip U1.

[0017] Preferably, a resistor R9 connected to the 8th pin of the chip U1 is connected to the gate of the MOS transistor Q1, a resistor R5 connected to the 5th pin of the chip U1 is connected to the gate of the MOS transistor Q2, a resistor R11 connected to the 9th pin of the chip U1 is connected to the gate of the MOS transistor Q3, a resistor R7 connected to the 6th pin of the chip U1 is connected to the gate of the MOS transistor Q4, and a resistor R3 connected to the 11th pin of the chip U1 is connected to the gate of the MOS transistor Q5.

[0018] Preferably, the short - circuit protection circuit includes a resistor R13 and a resistor R14 connected in parallel. The connection terminals of the resistor R13 and the resistor R14 are connected to the connection terminals of the source of the MOS transistor Q2 and the source of the MOS transistor Q4, and a resistor R2 connected to the 10th pin of the chip U1 is connected to the connection terminals of the resistor R13 and the resistor R14.

[0019] Preferably, the remote - control receiving circuit includes an infrared receiving chip IR. The 1st pin of the infrared receiving chip IR is connected to the 13th pin of the chip U1. A capacitor C3 is connected between the 2nd pin and the 3rd pin of the infrared receiving chip IR, and the 3rd pin of the infrared receiving chip IR is connected to the 1st pin of the chip U1.

[0020] Preferably, the power - reverse - connection protection circuit includes a diode D1 and a capacitor C1 connected in parallel. One connection terminal of the diode D1 and the capacitor C1 is connected to the 1st pin of the chip U1, and the other connection terminal of the diode D1 and the capacitor C1 is grounded.

[0021] Preferably, the battery - reverse - connection protection circuit includes a MOS transistor Q6. The drain of the MOS transistor Q6 is connected to the negative pole of the power supply. A capacitor C5 and a resistor R16 connected in parallel are connected between the gate and the drain of the MOS transistor Q6, and a resistor R15 connected to the positive pole of the power supply is connected to the gate of the MOS transistor Q6.

[0022] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0023] Through the design of the three - loop LED driving circuit, the present three - color LED is neither common - cathode nor common - anode, and has only three pins, that is, there are only three output lines, which is more convenient for installation and control. Moreover, the three - color LED can light up three colors: warm white, pure white, and colorful. Through different combinations of modes, more than a dozen functional modes can be changed, with a wider application range and more convenient practical use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the circuit block diagram of the present utility model;

[0025] Figure 2 is the circuit diagram of the program - control circuit of the present utility model;

[0026] Figure 3 This is the circuit diagram of the three - loop LED driving circuit and short - circuit protection circuit of the present utility model;

[0027] Figure 4 This is the circuit diagram of the remote - control receiving circuit of the present utility model;

[0028] Figure 5 This is the circuit diagram of the power supply reverse - connection protection circuit of the present utility model;

[0029] Figure 6 This is the circuit diagram of the battery reverse - connection protection circuit of the present utility model. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0031] Please refer to Figure 1-6 , the present utility model provides a technical solution: an efficient, energy - saving and safe three - color LED control circuit, including:

[0032] A program control circuit that controls the long - term lighting, flashing, breathing flash, color change and brightness adjustment of the three - color LED by controlling the output of the PWM signal;

[0033] The program control circuit includes a chip U1. The 1st pin of the chip U1 is connected to the positive pole of the 5V power supply. A crystal oscillator X1 and a resistor R17 are connected between the 2nd pin and the 3rd pin of the chip U1. A series - connected capacitor C7 and capacitor C8 are connected in parallel at both ends of the crystal oscillator X1, and the connection terminals of the capacitor C7 and capacitor C8 are grounded. A light - emitting diode LED and a resistor R1 are connected between the 1st pin and the 4th pin of the chip U1. A grounded switch SW is connected to the 7th pin of the chip U1.

[0034] A capacitor C4 and a resistor K are connected between the 10th pin and the 12th pin of the chip U1, and a capacitor C2 is connected between the 1st pin and the 14th pin of the chip U1. The connection terminals of the capacitor C4 and the resistor K are connected to the 14th pin of the chip U1 and grounded.

[0035] A three - loop LED driving circuit that provides stable current and voltage for the three - color LED;

[0036] The three-loop LED driving circuit includes MOS transistors Q1, Q2, Q3, Q4, and Q5. A connection terminal between the source electrode of MOS transistor Q1 and the drain electrode of MOS transistor Q2 is connected to a connection terminal between the source electrode of MOS transistor Q3 and the drain electrode of MOS transistor Q4, and an LED CW and an LED W are connected in parallel therebetween. An LED RGBY is connected between the source electrode of MOS transistor Q5 and the connection terminal between the source electrode of MOS transistor Q3 and the drain electrode of MOS transistor Q4. The drain electrode of MOS transistor Q5 is connected to pin 1 of chip U1.

[0037] A resistor R9 connected to pin 8 of chip U1 is connected to the gate electrode of MOS transistor Q1. A resistor R5 connected to pin 5 of chip U1 is connected to the gate electrode of MOS transistor Q2. A resistor R11 connected to pin 9 of chip U1 is connected to the gate electrode of MOS transistor Q3. A resistor R7 connected to pin 6 of chip U1 is connected to the gate electrode of MOS transistor Q4. A resistor R3 connected to pin 11 of chip U1 is connected to the gate electrode of MOS transistor Q5.

[0038] A resistor R10 is connected between the gate electrode and the drain electrode of MOS transistor Q1. A resistor R6 grounded is connected to the gate electrode of MOS transistor Q2. A resistor R12 is connected between the gate electrode and the drain electrode of MOS transistor Q3. A resistor R8 grounded is connected to a gate electrode having a resistor R4 connected between its gate electrode and drain electrode. A resistor R4 is connected between the gate electrode and the drain electrode of MOS transistor Q5. And the drain electrode of MOS transistor Q1 is connected to the drain electrode of MOS transistor Q3 and connected to pin 1 of chip U1.

[0039] A short-circuit protection circuit for cutting off the power supply in time when the three-color LED is short-circuited;

[0040] The short-circuit protection circuit includes a resistor R13 and a resistor R14 connected in parallel. The connection terminals of the resistor R13 and the resistor R14 are connected to the connection terminal between the source electrode of MOS transistor Q2 and the source electrode of MOS transistor Q4. And a resistor R2 connected to pin 10 of chip U1 is connected to the connection terminals of the resistor R13 and the resistor R14.

[0041] A remote control receiving circuit for receiving remote control signals;

[0042] The remote control receiving circuit includes an infrared receiving chip IR. Pin 1 of the infrared receiving chip IR is connected to pin 13 of chip U1. A capacitor C3 is connected between pin 2 and pin 3 of the infrared receiving chip IR. And pin 3 of the infrared receiving chip IR is connected to pin 1 of chip U1.

[0043] A power supply reverse connection protection circuit for preventing damage to circuit components when the power supply polarity is reversed;

[0044] The power supply reverse connection protection circuit includes a diode D1 and a capacitor C1 connected in parallel. One terminal of the diode D1 and the capacitor C1 is connected to pin 1 of the chip U1, and the other terminal of the diode D1 and the capacitor C1 is grounded.

[0045] A battery reverse connection protection circuit for preventing damage to the battery when the battery polarity is reversed;

[0046] The short - circuit protection circuit is electrically connected to the three - loop LED driving circuit. The three - loop LED driving circuit, the short - circuit protection circuit, the remote control receiving circuit, the power supply reverse connection protection circuit, and the battery reverse connection protection circuit are all electrically connected to the program control circuit.

[0047] The battery reverse connection protection circuit includes an MOS transistor Q6. The drain of the MOS transistor Q6 is connected to the negative pole of the power supply. A capacitor C5 and a resistor R16 connected in parallel are connected between the gate and the drain of the MOS transistor Q6, and a resistor R15 connected to the positive pole of the power supply is connected to the gate of the MOS transistor Q6.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An efficient, energy-saving and safe three-color LED control circuit, characterized in that, Comprising: A program control circuit for controlling the continuous lighting, flashing, breathing flash, color change, and brightness adjustment of a three-color LED by controlling the output of a PWM signal; A three-loop LED driving circuit for providing stable current and voltage to the three-color LED; A short-circuit protection circuit for promptly cutting off the power supply when a short circuit occurs in the three-color LED; A remote control receiving circuit for receiving signals from a remote control; A power supply reverse connection protection circuit for preventing damage to circuit components when the power supply polarity is reversed; A battery reverse connection protection circuit for preventing damage to the battery when the battery polarity is reversed; The short-circuit protection circuit is electrically connected to the three-loop LED driving circuit, and the three-loop LED driving circuit, short-circuit protection circuit, remote control receiving circuit, power supply reverse connection protection circuit, and battery reverse connection protection circuit are all electrically connected to the program control circuit.

2. An efficient energy-saving and safe three-color LED control circuit according to claim 1, characterized in that: The program control circuit includes a chip U1. The 1st pin of the chip U1 is connected to the positive pole of a 5V power supply. A crystal oscillator X1 and a resistor R17 are connected between the 2nd pin and the 3rd pin of the chip U1. A capacitor C7 and a capacitor C8 connected in series are connected in parallel at both ends of the crystal oscillator X1. A light-emitting diode LED and a resistor R1 are connected between the 1st pin and the 4th pin of the chip U1. A switch SW grounded is connected to the 7th pin of the chip U1.

3. An efficient energy-saving and safe three-color LED control circuit according to claim 2, characterized in that: The three-loop LED driving circuit includes MOS transistors Q1, Q2, Q3, Q4, and Q5. A light-emitting diode CW and a light-emitting diode W connected in parallel are connected between the connection terminals of the source electrode of the MOS transistor Q1 and the drain electrode of the MOS transistor Q2 and the connection terminals of the source electrode of the MOS transistor Q3 and the drain electrode of the MOS transistor Q4. A light-emitting diode RGBY is connected between the source electrode of the MOS transistor Q5 and the connection terminals of the source electrode of the MOS transistor Q3 and the drain electrode of the MOS transistor Q4. The drain electrode of the MOS transistor Q5 is connected to the 1st pin of the chip U1.

4. An efficient energy-saving and safe three-color LED control circuit according to claim 3, characterized in that: A resistor R9 connected to the 8th pin of the chip U1 is connected to the gate of the MOS transistor Q1. A resistor R5 connected to the 5th pin of the chip U1 is connected to the gate of the MOS transistor Q2. A resistor R11 connected to the 9th pin of the chip U1 is connected to the gate of the MOS transistor Q3. A resistor R7 connected to the 6th pin of the chip U1 is connected to the gate of the MOS transistor Q4. A resistor R3 connected to the 11th pin of the chip U1 is connected to the gate of the MOS transistor Q5.

5. An efficient energy-saving and safe three-color LED control circuit according to claim 4, characterized in that: The short-circuit protection circuit includes a resistor R13 and a resistor R14 connected in parallel. The connection terminals of the resistor R13 and the resistor R14 are connected to the connection terminals of the source electrode of the MOS transistor Q2 and the source electrode of the MOS transistor Q4, and a resistor R2 connected to the 10th pin of the chip U1 is connected to the connection terminals of the resistor R13 and the resistor R14.

6. An efficient energy-saving and safe three-color LED control circuit according to claim 5, characterized in that: The remote control receiving circuit includes an infrared receiving chip IR. The 1st pin of the infrared receiving chip IR is connected to the 13th pin of the chip U1. A capacitor C3 is connected between the 2nd pin and the 3rd pin of the infrared receiving chip IR, and the 3rd pin of the infrared receiving chip IR is connected to the 1st pin of the chip U1.

7. An efficient energy-saving and safe three-color LED control circuit according to claim 6, characterized in that: The power supply reverse connection protection circuit includes a diode D1 and a capacitor C1 connected in parallel. One connection terminal of the diode D1 and the capacitor C1 is connected to pin 1 of the chip U1, and the other connection terminal of the diode D1 and the capacitor C1 is grounded.

8. An efficient energy-saving and safe three-color LED control circuit according to claim 7, characterized in that: The battery reverse connection protection circuit includes an MOS transistor Q6. The drain of the MOS transistor Q6 is connected to the negative pole of the power supply. A capacitor C5 and a resistor R16 connected in parallel are connected between the gate and the drain of the MOS transistor Q6, and a resistor R15 connected to the positive pole of the power supply is connected to the gate of the MOS transistor Q6.

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