CN210469800U

CN210469800U - Wide color temperature regulating circuit of LED lamp

Info

Publication number: CN210469800U
Application number: CN201921499613.9U
Authority: CN
Inventors: 郭敏; 徐国平; 康通博; 谢笑笑
Original assignee: Silian Technology Beijing Co Ltd
Current assignee: Silian Technology Beijing Co Ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-05-05
Anticipated expiration: 2029-09-10

Abstract

The utility model discloses a wide colour temperature regulating circuit of LED lamps and lanterns, include: a color temperature adjusting circuit; the color temperature adjusting circuit is provided with 5 input ends and 6 output ends, wherein the input ends 1 to 5 are respectively connected with PWM1 to PWM5 signals, and the output ends 6 to 11 are respectively used for outputting S1 to S6 signals; six switching tubes; each output end of the color temperature adjusting circuit is connected with a switching tube, and the output end is connected with the grid electrode of the switching tube; six LED light sources; each switch tube is connected with an LED light source, and the drain electrode of each switch tube is connected with the cathode of the LED light source; the positive pole of each LED light source all links to each other with LED drive power supply's positive pole, and the source electrode of each switch tube all links to each other with LED drive power supply's negative pole. The wide color temperature adjusting circuit of the LED lamp realizes wide color temperature adjustment and reduces the cost.

Description

Wide color temperature regulating circuit of LED lamp

Technical Field

The utility model relates to a circuit technical field especially relates to a wide colour temperature regulating circuit of LED lamps and lanterns.

Background

With the continuous progress of the technology, the requirements of people on the LED lighting effect are higher and higher. In order to adapt to illumination in different environments, people hope to realize wide-range color temperature adjustment and create different atmospheres.

The LED lamp with adjustable color temperature can adopt the white light LED arrays with high and low two color temperatures to be densely and alternately arranged, so that the lights with the two color temperatures are fully mixed, the overall color temperature adjustment can be realized by adjusting the conduction proportion of the two LEDs, and an implementation scheme is respectively given in figures 1 and 2, but the two circuit structures are not suitable for large-range and high-precision color temperature adjustment.

Because the color temperature adjustment range required in life needs to be covered, the adjustment is required to be carried out between 2200-12000K color temperature. If the scheme of fig. 1 is adopted, only the 2200K color temperature LED and the 12000K color temperature LED can be used for mixing light, and the color temperature adjustment precision is undoubtedly extremely low because the difference between 2200K and 12000K is too large. Obviously, the scheme of fig. 1 cannot realize wide color temperature adjustment because it is only suitable for mixing light of two LEDs. If the scheme of fig. 2 is adopted, 6 driving power supplies are needed, as shown in fig. 3, and the cost is too high.

Therefore, how to realize wide color temperature adjustment and reduce the device cost is an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a wide colour temperature regulating circuit of LED lamps and lanterns realizes wide colour temperature regulation to reduce cost.

In order to solve the technical problem, the utility model provides a wide colour temperature regulating circuit of LED lamps and lanterns, include:

a color temperature adjusting circuit; the color temperature adjusting circuit is provided with 5 input ends and 6 output ends, wherein the input ends 1 to 5 are respectively connected with PWM1 to PWM5 signals, and the output ends 6 to 11 are respectively used for outputting S1 to S6 signals;

six switching tubes; each output end of the color temperature adjusting circuit is connected with a switching tube, and the output end is connected with the grid electrode of the switching tube; the six switching tubes comprise switching tubes Q6, Q12, Q2, Q9, Q14 and Q20;

six LED light sources; each switch tube is connected with an LED light source, and the drain electrode of each switch tube is connected with the cathode of the LED light source; the six LED light sources include light sources LEDA, LEDB, LEDC, LEDD, LEDE, LEAF.

An LED driving power supply; the anode of each LED light source is connected with the anode of the LED driving power supply, and the source electrode of each switching tube is connected with the cathode of the LED driving power supply;

the direct current power supply VDD is connected with the color temperature adjusting circuit;

the color temperature adjusting circuit comprises a first conduction circuit, a second conduction circuit, a third conduction circuit, a fourth conduction circuit, a fifth conduction circuit, a sixth conduction circuit, a first inverter and a second inverter; the first conduction circuit to the sixth conduction circuit respectively output signals from S1 to S6, the first inverter is connected with the third conduction circuit, the fourth conduction circuit, the fifth conduction circuit and the sixth conduction circuit, and the second inverter is connected with the fifth conduction circuit and the sixth conduction circuit.

Preferably, the first on circuit comprises resistors R9, R2, R6 and R10, and transistors Q7 and Q5; the base electrode of the triode Q7 is connected with the input end 3 through a resistor R9, the collector electrode is divided into two paths, one path is connected with a direct current power supply VDD through a resistor R2, and the other path is connected with the output end 6; the collector of the triode Q5 is connected with the output end 6, the base is divided into two paths, one path is connected with the cathode of the LED driving power supply through the resistor R10, and the other path is connected with the input end 1 through the resistor R6; and the emitting electrodes of the triodes Q5 and Q7 are both connected with the negative electrode of the LED driving power supply.

Preferably, the second on circuit includes resistors R13, R16 and a transistor Q11; the collector of the triode Q11 is connected with the input end 3 and the output end 7, the emitter is connected with the cathode of the LED driving power supply, the base is divided into two paths, one path is connected with the input end 1 through the resistor R13, and the other path is connected with the cathode of the LED driving power supply through the resistor R16.

Preferably, the first inverter comprises resistors R25 and R23 and a triode Q17; the base electrode of the triode Q17 is connected with the input end 1 through a resistor R25, the collector electrode is connected with a direct current power supply VDD through a resistor R23, and the emitter electrode is connected with the negative electrode of the LED driving power supply; the collector of the transistor Q17 outputs an inverted signal PWM1R of the PWM1 signal; the second inverter has the same circuit structure as the first inverter, in which the base of the transistor Q18 is connected to the input terminal 2 via R26, and the collector outputs the inverse signal PWM2R of the PWM2 signal.

Preferably, the third conducting circuit comprises transistors Q3, Q1 and Q4, and resistors R1, R5, R4, R7, R3 and R8; the base electrode of the triode Q3 is connected with the input end 4 through a resistor R5, and the collector electrode is connected with a direct current power supply VDD through R1; the base electrode of the triode Q1 is divided into two paths, one path is connected with the collector electrode of the triode Q17 of the first inverter through R4, and the other path is connected with the negative electrode of the LED driving power supply through R7; the base electrode of the triode Q4 is divided into two paths, one path is connected with the input end 2 through R3, and the other path is connected with the negative electrode of the LED driving power supply through R8; the collectors of the triodes Q3, Q1 and Q4 are all connected with the output end 8, and the emitters of the triodes Q3, Q1 and Q4 are all connected with the cathode of the LED driving power supply.

Preferably, the fourth conducting circuit comprises transistors Q8 and Q10, and resistors R12, R14, R11 and R15; the base electrode of the triode Q8 is divided into two paths, one path is connected with the collector electrode of the triode Q17 of the first inverter through R12, and the other path is connected with the negative electrode of the LED driving power supply through R14; the base electrode of the triode Q10 is divided into two paths, one path is connected with the input end 2 through R11, and the other path is connected with the negative electrode of the LED driving power supply through R15; the emitting electrodes of the triodes Q8 and Q10 are both connected with the negative electrode of the LED driving power supply, and the collecting electrodes of the triodes Q8 and Q10 are both connected with the output end 9.

Preferably, the fifth conduction circuit and the third conduction circuit have the same circuit structure, and the sixth conduction circuit and the fourth conduction circuit have the same circuit structure; in the fifth conducting circuit, the base of a triode Q15 is connected with the input end 5 through a resistor R20, the collectors of the triodes Q15, Q13 and Q16 are all connected with the output end 10, and the base of a triode Q16 is connected with the collector of a triode Q18 of the second inverter through a resistor R19; in the sixth conducting circuit, the base of the triode Q21 is connected with the collector of the triode Q18 of the second inverter through the resistor R28, and the collectors of the triodes Q19 and Q21 are both connected with the output terminal 11.

The utility model provides a wide colour temperature regulating circuit of LED lamps and lanterns, include: a color temperature adjusting circuit; the color temperature adjusting circuit is provided with 5 input ends and 6 output ends, wherein the input ends 1 to 5 are respectively connected with PWM1 to PWM5 signals, and the output ends 6 to 11 are respectively used for outputting S1 to S6 signals; six switching tubes; each output end of the color temperature adjusting circuit is connected with a switching tube, and the output end is connected with the grid electrode of the switching tube; six LED light sources; each switch tube is connected with an LED light source, and the drain electrode of each switch tube is connected with the cathode of the LED light source and an LED driving power supply; the anode of each LED light source is connected with the anode of the LED driving power supply, and the source electrode of each switching tube is connected with the cathode of the LED driving power supply; the direct current power supply VDD is connected with the color temperature adjusting circuit; the color temperature adjusting circuit comprises a first conduction circuit, a second conduction circuit, a third conduction circuit, a fourth conduction circuit, a fifth conduction circuit, a sixth conduction circuit, a first inverter and a second inverter; the first conduction circuit to the sixth conduction circuit respectively output signals from S1 to S6, the first inverter is connected with the third conduction circuit, the fourth conduction circuit, the fifth conduction circuit and the sixth conduction circuit, and the second inverter is connected with the fifth conduction circuit and the sixth conduction circuit. It can be seen that the utility model provides a wide color temperature regulating circuit of LED lamps and lanterns has realized 5 way PWM signals of input (PWM1, PWM2, PWM3, PWM4, PWM5), 6 way PWM signals of output (S1, S2, S3, S4, S5, S6) drive 6 power mos switch devices promptly the switch tube respectively, when S3 to S6 keep the duty cycle to be 0%, light source LEDC, LEDD, LEDE and LEDF are not lighted, S1 and S2 duty cycle are nonzero and be the opposite phase signal this moment, adjust S1 and S2 duty cycle signal and can adjust light source LEDA and light source LEDB turn-on ratio, thereby realize the color temperature regulation between 2200K to 3000K. Similarly, duty ratios of the S1, S4, S5 and S6 are kept to be zero, and the on-state ratio of the light source LEDB and the light source LEDC can be adjusted by adjusting duty ratio signals of S2 and S3, so that color temperature adjustment between 3000K and 5000K is realized, and the like. The utility model discloses a LED of multiple different colour temperatures mixes the light, has increased the colour temperature kind of participating in mixing the light when colour temperature adjusts on a large scale. Therefore, the wide color temperature adjusting circuit of the LED lamp can realize the light mixing of 6 color temperature LEDs by only adopting one driving power supply by only adding a few low-cost devices, thereby achieving the purpose of wide color temperature adjustment, realizing the wide color temperature adjustment and reducing the cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of a color temperature adjusting circuit in the prior art;

FIG. 2 is a schematic diagram of another prior art color temperature adjusting circuit;

FIG. 3 is a schematic diagram of a circuit structure for implementing multi-color-temperature light mixing in the prior art;

fig. 4 is a schematic diagram of a wide color temperature adjusting circuit of an LED lamp according to the present invention;

FIG. 5 is a schematic diagram of a color temperature adjusting circuit.

Detailed Description

The core of the utility model is to provide a wide colour temperature regulating circuit of LED lamps and lanterns to realize wide colour temperature and adjust, and reduce cost.

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 4 and 5, fig. 4 is a schematic diagram of a wide color temperature adjusting circuit structure of an LED lamp according to the present invention, fig. 5 is a schematic diagram of a color temperature adjusting circuit structure, the wide color temperature adjusting circuit of the LED lamp includes:

a color temperature adjusting circuit 101; the color temperature adjusting circuit 101 has 5 input terminals and 6 output terminals, the input terminals 1 to 5 are respectively connected to the PWM1 to PWM5 signals, and the output terminals 6 to 11 are respectively connected to the S1 to S6 signals;

six switching tubes; each output end of the color temperature adjusting circuit 101 is connected with a switch tube, and the output end is connected with the grid electrode of the switch tube; the six switching tubes comprise switching tubes Q6, Q12, Q2, Q9, Q14 and Q20;

An LED drive power supply 102; the anode of each LED light source is connected with the anode of the LED driving power supply 102, and the source of each switching tube is connected with the cathode of the LED driving power supply 102;

a direct current power supply VDD103 connected with the color temperature adjusting circuit;

the color temperature adjusting circuit 101 includes a first conducting circuit 201, a second conducting circuit 202, a third conducting circuit 203, a fourth conducting circuit 204, a fifth conducting circuit 205, a sixth conducting circuit 206, a first inverter 207, and a second inverter 208; the first to sixth turn-on circuits 201 to 206 output signals S1 to S6, respectively, the first inverter 207 is connected to the third turn-on circuit 203, the fourth turn-on circuit 204, the fifth turn-on circuit 205 and the sixth turn-on circuit 206, and the second inverter 208 is connected to the fifth turn-on circuit 205 and the sixth turn-on circuit 206.

It can be seen that the utility model provides a wide color temperature regulating circuit of LED lamps and lanterns has realized 5 way PWM signals of input (PWM1, PWM2, PWM3, PWM4, PWM5), 6 way PWM signals of output (S1, S2, S3, S4, S5, S6) drive 6 power mos switch devices promptly the switch tube respectively, when S3 to S6 keep the duty cycle to be 0%, light source LEDC, LEDD, LEDE and LEDF are not lighted, S1 and S2 duty cycle are nonzero and be the opposite phase signal this moment, adjust S1 and S2 duty cycle signal and can adjust light source LEDA and light source LEDB turn-on ratio, thereby realize the color temperature regulation between 2200K to 3000K. Similarly, duty ratios of the S1, S4, S5 and S6 are kept to be zero, and the on-state ratio of the light source LEDB and the light source LEDC can be adjusted by adjusting duty ratio signals of S2 and S3, so that color temperature adjustment between 3000K and 5000K is realized, and the like. The utility model discloses a LED of multiple different colour temperatures mixes the light, has increased the colour temperature kind of participating in mixing the light when colour temperature adjusts on a large scale. Therefore, the wide color temperature adjusting circuit of the LED lamp can realize the light mixing of 6 color temperature LEDs by only adopting one driving power supply by only adding a few low-cost devices, thereby achieving the purpose of wide color temperature adjustment, realizing the wide color temperature adjustment and reducing the cost.

It should be noted that the input terminals appearing herein all represent the input terminals of the color temperature adjusting circuit 101, the output terminals appearing herein all represent the output terminals of the color temperature adjusting circuit 101, the input terminals of the color temperature adjusting circuit include the input terminal 1, the input terminal 2, the input terminal 3, the input terminal 4, and the input terminal 5, and the output terminals of the color temperature adjusting circuit include the output terminal 6, the output terminal 7, the output terminal 8, the output terminal 9, the output terminal 10, and the output terminal 11. The input terminal 1 receives a PWM1 signal, the input terminal 2 receives a PWM2 signal, the input terminal 3 receives a PWM3 signal, the input terminal 4 receives a PWM4 signal, and the input terminal 5 receives a PWM5 signal. The output terminal 6 outputs a signal S1, the output terminal 7 outputs a signal S2, the output terminal 8 outputs a signal S3, the output terminal 9 outputs a signal S4, the output terminal 10 outputs a signal S5, and the output terminal 11 outputs a signal S6.

In detail, the grid electrode of the switching tube Q6 is connected with the output end 6, and the drain electrode is connected with the cathode of the light source LEDA; the grid electrode of the switching tube Q12 is connected with the output end 7, and the drain electrode is connected with the negative electrode of the light source LEDB; the grid electrode of the switching tube Q2 is connected with the output end 8, and the drain electrode is connected with the cathode of the light source LEDC; the grid electrode of the switching tube Q9 is connected with the output end 9, and the drain electrode is connected with the cathode of the light source LEDD; the grid electrode of the switching tube Q14 is connected with the output end 10, and the drain electrode is connected with the cathode of the light source LEDE; the gate of the switching tube Q20 is connected to the output terminal 11, and the drain is connected to the cathode of the light source LEDF. The anodes of the light sources LEDA, LEDB, LEDC, LEDD, LEDE, and LEAF are all connected to the anode of the LED driving power source 102, and the sources of the switching tubes Q6, Q12, Q2, Q9, Q14, and Q20 are all connected to the cathode of the LED driving power source 102.

The direct current power supply VDD103 is an auxiliary direct current power supply, and the positive electrode of the direct current power supply VDD103 is connected with the color temperature adjusting circuit.

Based on the wide color temperature adjusting circuit of the LED lamp, further, the first conducting circuit 101 includes resistors R9, R2, R6, R10, and triodes Q7, Q5; the base electrode of the triode Q7 is connected with the input end 3 through a resistor R9, the collector electrode is divided into two paths, one path is connected with a direct current power supply VDD through a resistor R2, and the other path is connected with the output end 6; the base electrode of the triode Q5 is connected with the output end 6, the emitting electrode is divided into two paths, one path is connected with the cathode of the LED driving power supply through the resistor R10, and the other path is connected with the input end 1 through the resistor R6; and the emitting electrodes of the triodes Q5 and Q7 are both connected with the negative electrode of the LED driving power supply.

The second turn-on circuit 202 includes resistors R13 and R16 and a transistor Q11; the collector of the triode Q11 is connected with the input end 3 and the output end 7, the emitter is connected with the cathode of the LED driving power supply, the base is divided into two paths, one path is connected with the input end 1 through the resistor R13, and the other path is connected with the cathode of the LED driving power supply through the resistor R16.

The first inverter 207 comprises resistors R25 and R23 and a transistor Q17; the base electrode of the triode Q17 is connected with the input end 1 through a resistor R25, the collector electrode is connected with a direct current power supply VDD through a resistor R23, and the emitter electrode is connected with the negative electrode of the LED driving power supply; the collector of the transistor Q17 outputs an inverted signal PWM1R of the PWM1 signal; the second inverter 208 has the same circuit structure as the first inverter 207, and in the second inverter 208, a base of a transistor Q18 is connected to the input terminal 2 via R26, and a collector outputs an inverted signal PWM2R of the PWM2 signal. Specifically, the second inverter 208 includes resistors R24, R26, and a transistor Q18; the collector of the triode Q18 is connected with a DC power supply VDD through a resistor R24, and the emitter is connected with the cathode of the LED driving power supply.

The third on-circuit 203 includes transistors Q3, Q1, Q4, and resistors R1, R5, R4, R7, R3, and R8; the base electrode of the triode Q3 is connected with the input end 4 through a resistor R5, and the collector electrode is connected with a direct current power supply VDD through R1; the base electrode of the triode Q1 is divided into two paths, one path is connected with the collector electrode of the triode Q17 of the first phase inverter 207 through R4, and the other path is connected with the negative electrode of the LED driving power supply through R7; the base electrode of the triode Q4 is divided into two paths, one path is connected with the input end 2 through R3, and the other path is connected with the negative electrode of the LED driving power supply through R8; the collectors of the triodes Q3, Q1 and Q4 are all connected with the output end 8, and the emitters of the triodes Q3, Q1 and Q4 are all connected with the cathode of the LED driving power supply.

The fourth on circuit 204 includes transistors Q8 and Q10, and resistors R12, R14, R11, and R15; the base electrode of the triode Q8 is divided into two paths, one path is connected with the collector electrode of the triode Q17 of the first phase inverter 207 through R12, and the other path is connected with the negative electrode of the LED driving power supply through R14; the base electrode of the triode Q10 is divided into two paths, one path is connected with the input end 2 through R11, and the other path is connected with the negative electrode of the LED driving power supply through R15; the emitting electrodes of the triodes Q8 and Q10 are both connected with the negative electrode of the LED driving power supply, and the collecting electrodes of the triodes Q8 and Q10 are both connected with the output end 9.

Further, the fifth turn-on circuit 205 and the third turn-on circuit 203 have the same circuit structure, and the sixth turn-on circuit 206 and the fourth turn-on circuit 204 have the same circuit structure; in the fifth conducting circuit 205, the base of the triode Q15 is connected with the input terminal 5 through the resistor R20, the collectors of the triodes Q15, Q13 and Q16 are all connected with the output terminal 10, and the base of the triode Q16 is connected with the collector of the triode Q18 of the second inverter through the resistor R19; in the sixth turn-on circuit 206, the base of the transistor Q21 is connected to the collector of the transistor Q18 of the second inverter via the resistor R28, and the collectors of the transistors Q19 and Q21 are both connected to the output terminal 11.

Specifically, the fifth turn-on circuit 205 includes transistors Q15, Q13, Q16, and resistors R20, R17, R18, R21, R19, and R22; the base electrode of the triode Q15 is connected with the input end 5 through a resistor R20, and the collector electrode is connected with a direct current power supply VDD through R17; the base electrode of the triode Q13 is divided into two paths, one path is connected with the collector electrode of the triode Q17 of the first phase inverter 207 through R18, and the other path is connected with the negative electrode of the LED driving power supply through R21; the base electrode of the triode Q16 is divided into two paths, one path is connected with the collector electrode of the triode Q18 of the second inverter through R19, and the other path is connected with the negative electrode of the LED driving power supply through R22; the collectors of the triodes Q15, Q13 and Q16 are all connected with the output end 10, and the emitters of the triodes Q15, Q13 and Q16 are all connected with the cathode of the LED driving power supply.

The sixth turn-on circuit 206 includes transistors Q19, Q21, and resistors R27, R29, R28, R30; the base electrode of the triode Q19 is divided into two paths, one path is connected with the collector electrode of the triode Q17 of the first phase inverter 207 through R27, and the other path is connected with the negative electrode of the LED driving power supply through R29; the base electrode of the triode Q21 is divided into two paths, one path is connected with the collector electrode of the triode Q18 of the second inverter 208 through R28, and the other path is connected with the negative electrode of the LED driving power supply through R30; emitting electrodes of the triodes Q19 and Q21 are connected with a negative electrode of the LED driving power supply, a collector electrode of the triode Q19 is connected with the input end 5 and the output end 11, and a collector electrode of the triode Q21 is connected with the input end 5 and the output end 11.

Based on the color temperature adjusting circuit 101, the circuit implements the control logic as shown in table 1, where table 1 is a logic control table of the input signals PWM1 to PWM 5.

TABLE 1

When the adjustment between 3000 and 5000K is required, the duty ratio of the PWM2 is kept at 0%, the Q18 is cut off, the duty ratio of the output inverted signal PWM2R is kept at 100%, the Q16 and the Q21 are conducted, and the grid voltages of the Q14 and the Q20 are close to 0V, so that neither LEDE nor LEDF can be lightened. When the duty ratio of the PWM3 is kept at 100%, the Q7 is conducted, the grid voltage of the Q6 is close to 0V, and therefore the LEDA is not lighted. The duty cycle of PWM4 is kept at 0%, and the gate voltage of Q9 is 0V, so the duty cycle of S4 is 0, and LEDD does not light. The duty ratio of a PWM1 signal is not zero and is adjustable, when the PWM1 is at a high level, Q11 is conducted, the grid voltage of Q12 is close to 0V, and LEDB does not light; when the PWM1 is high, Q17 is on, PWM1R is low, Q1 is off, and Q4 is off because the PWM2 duty cycle remains 0%, at which time the Q2 gate is high and on, and the LEDC lights up. Otherwise, when PWM1 is low, LEDB is on and LEDC is off. Therefore, the lamp lighting proportion of LEDB (3000K) and LEDC (5000K) can be adjusted by adjusting the duty ratio of PWM1, and the adjustment between the color temperature of 3000 and 5000K is realized. Meanwhile, the S2 and S3 signals are two paths of pulse signals with opposite phases and output by PWM1 control, namely only one path of conduction is formed between LEDB (3000K) and LEDC (5000K) at any time, so that the total power of the lamp is kept unchanged, and the driving requirement is met by only one driving power supply. The rest of the color temperature adjusting mode is similar to the above.

The utility model discloses a wide colour temperature regulating circuit of LED lamps and lanterns only increases a little low-cost device, thereby only adopts a drive power supply to realize 6 kinds of colour temperature LED mixed light promptly and reaches the purpose that wide colour temperature was adjusted. In order to realize on a large scale the regulation of high accuracy colour temperature, the utility model discloses a LED of multiple different colour temperatures mixes the light, has increased the colour temperature kind of participating in mixing the light when colour temperature regulation on a large scale. When the color temperature of 2200-. When the color temperature value is set between 2200-3000K, the LEDA and LEDB light mixing is adopted, when the color temperature value is set between 3000-5000K, the LEDB and LEDC light mixing is adopted, and the like.

The utility model provides a thereby wide colour temperature regulating circuit of LED lamps and lanterns only adopts a drive power supply to realize 6 kinds of colour temperature LED mixed light and realize the wide colour temperature regulation of high performance price ratio. The cost can be reduced by more than 70%. Moreover, in the common lighting requirement (adjustable within 6500K), the prior art only adopts 2 color temperature LEDs for light mixing, and the circuit disclosed herein can realize 6 color temperature light mixing at low cost, which greatly improves the color temperature adjustment precision. And moreover, the total power of the driving power supply is kept unchanged while the control of mixing light of a plurality of color temperatures is realized, so that the efficiency and the service life of the power supply are greatly improved. In addition, the wide color temperature adjusting circuit of the LED lamp is simple in structure, simple in requirements on signal source control logic, and capable of obviously reducing the design difficulty of a signal source. Moreover, the circuit has ductility, and the light mixing realization of more color temperature LEDs can be expanded according to the structure.

It is right above the utility model provides a wide colour temperature regulating circuit of LED lamps and lanterns introduces in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A wide color temperature regulating circuit of an LED lamp is characterized by comprising:

six LED light sources; each switch tube is connected with an LED light source, and the drain electrode of each switch tube is connected with the cathode of the LED light source; the six LED light sources comprise light sources LEDA, LEDB, LEDC, LEDD, LEDE and LEAF;

2. The wide color temperature adjusting circuit of claim 1, wherein the first conducting circuit comprises resistors R9, R2, R6 and R10, and transistors Q7 and Q5; the base electrode of the triode Q7 is connected with the input end 3 through a resistor R9, the collector electrode is divided into two paths, one path is connected with a direct current power supply VDD through a resistor R2, and the other path is connected with the output end 6; the collector of the triode Q5 is connected with the output end 6, the base is divided into two paths, one path is connected with the cathode of the LED driving power supply through the resistor R10, and the other path is connected with the input end 1 through the resistor R6; and the emitting electrodes of the triodes Q5 and Q7 are both connected with the negative electrode of the LED driving power supply.

3. The LED lamp wide color temperature adjustment circuit of claim 2, wherein the second conducting circuit comprises resistors R13, R16 and a transistor Q11; the collector of the triode Q11 is connected with the input end 3 and the output end 7, the emitter is connected with the cathode of the LED driving power supply, the base is divided into two paths, one path is connected with the input end 1 through the resistor R13, and the other path is connected with the cathode of the LED driving power supply through the resistor R16.

4. The LED lamp wide color temperature regulating circuit according to claim 3, wherein the first inverter comprises resistors R25, R23 and a transistor Q17; the base electrode of the triode Q17 is connected with the input end 1 through a resistor R25, the collector electrode is connected with a direct current power supply VDD through a resistor R23, and the emitter electrode is connected with the negative electrode of the LED driving power supply; the collector of the transistor Q17 outputs an inverted signal PWM1R of the PWM1 signal; the second inverter has the same circuit structure as the first inverter, in which the base of the transistor Q18 is connected to the input terminal 2 via R26, and the collector outputs the inverse signal PWM2R of the PWM2 signal.

5. The LED lamp wide color temperature adjusting circuit of claim 4, wherein the third conducting circuit comprises transistors Q3, Q1, Q4, and resistors R1, R5, R4, R7, R3, R8; the base electrode of the triode Q3 is connected with the input end 4 through a resistor R5, and the collector electrode is connected with a direct current power supply VDD through R1; the base electrode of the triode Q1 is divided into two paths, one path is connected with the collector electrode of the triode Q17 of the first inverter through R4, and the other path is connected with the negative electrode of the LED driving power supply through R7; the base electrode of the triode Q4 is divided into two paths, one path is connected with the input end 2 through R3, and the other path is connected with the negative electrode of the LED driving power supply through R8; the collectors of the triodes Q3, Q1 and Q4 are all connected with the output end 8, and the emitters of the triodes Q3, Q1 and Q4 are all connected with the cathode of the LED driving power supply.

6. The LED lamp wide color temperature adjusting circuit of claim 5, wherein the fourth conducting circuit comprises transistors Q8, Q10, and resistors R12, R14, R11, R15; the base electrode of the triode Q8 is divided into two paths, one path is connected with the collector electrode of the triode Q17 of the first inverter through R12, and the other path is connected with the negative electrode of the LED driving power supply through R14; the base electrode of the triode Q10 is divided into two paths, one path is connected with the input end 2 through R11, and the other path is connected with the negative electrode of the LED driving power supply through R15; the emitting electrodes of the triodes Q8 and Q10 are both connected with the negative electrode of the LED driving power supply, and the collecting electrodes of the triodes Q8 and Q10 are both connected with the output end 9.

7. The LED lamp wide color temperature adjusting circuit of claim 6, wherein the fifth conducting circuit and the third conducting circuit have the same circuit structure, and the sixth conducting circuit and the fourth conducting circuit have the same circuit structure; in the fifth conducting circuit, the base of a triode Q15 is connected with the input end 5 through a resistor R20, the collectors of the triodes Q15, Q13 and Q16 are all connected with the output end 10, and the base of a triode Q16 is connected with the collector of a triode Q18 of the second inverter through a resistor R19; in the sixth conducting circuit, the base of the triode Q21 is connected with the collector of the triode Q18 of the second inverter through the resistor R28, and the collectors of the triodes Q19 and Q21 are both connected with the output terminal 11.