CN212086543U

CN212086543U - LED dimming and color mixing circuit and device

Info

Publication number: CN212086543U
Application number: CN202021117829.7U
Authority: CN
Inventors: 刘文俊; 金海峰; 金海诚
Original assignee: Guangdong Xinshen Technology Co ltd
Current assignee: Guangdong Xinshen Technology Co ltd
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2020-12-04
Anticipated expiration: 2030-06-16

Abstract

The utility model discloses a LED mixing of colors circuit and device of adjusting luminance, the circuit includes: the LED driving circuit comprises a cold color temperature LED, a warm color temperature LED, a main control chip, a color modulation control circuit, a light modulation control circuit and an LED driving power supply; the main control chip is connected with the color modulation control circuit and the light modulation control circuit, the color modulation control circuit is respectively connected with the cold color temperature LED and the warm color temperature LED, and the light modulation control circuit is connected with the LED driving power supply; the main control chip is used for outputting a color modulation control signal and a light modulation control signal; the color modulation control circuit is used for respectively adjusting the duty ratio of the cold color temperature LED and the duty ratio of the warm color temperature LED; the dimming control circuit is used for generating dimming control voltage and sending the dimming control voltage to the LED driving power supply; the LED driving power supply is used for adjusting the power supply voltage. The utility model discloses can realize LED's dimming and mixing of colors through a LED drive power supply, reduce lamps and lanterns internal circuit volume, reduce the circuit cost of LED lamps and lanterns.

Description

LED dimming and color mixing circuit and device

Technical Field

The utility model relates to a circuit electron field especially relates to LED mixing of colors circuit and device of adjusting luminance.

Background

At present, the light control mode of the LED mainly includes setting a cold color LED light string and a warm color LED light string, and supplying power to the cold color LED light string and the warm color LED light string through two different sets of LED driving power supplies. The light control device can enable the two LED driving power supplies to respectively adjust the power supply voltage output to the LEDs by sending different adjusting signals to the two LED driving power supplies, so that the adjustment of the brightness of the LEDs and the adjustment of the color temperature are realized. However, the LED lamp with a small space is provided with the control device and two LED driving power supplies at the same time, which occupies a large built-in space, and thus the LED lamp is too large in volume. However, if the size of the LED lamp is limited by the design, the two LED driving power supplies cannot be installed in a narrow space of the LED lamp.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a LED dimming and color mixing circuit and device, which can solve the problem of the LED lamp that the volume is limited and the LED lamp cannot be driven by a plurality of LEDs.

In order to achieve the above object, the utility model provides a LED dimming and color mixing circuit, include: the LED driving circuit comprises a cold color temperature LED, a warm color temperature LED, a main control chip, a color modulation control circuit, a light modulation control circuit and an LED driving power supply;

the input end of the LED driving power supply is connected with a mains supply, and the first output end of the LED driving power supply is respectively connected with the cold color temperature LED and the warm color temperature LED;

the color adjusting output end of the main control chip is connected with the input end of the color adjusting control circuit, two output ends of the color adjusting control circuit are respectively connected with the controlled ends of the cold color temperature LED and the warm color temperature LED, the dimming output end of the main control chip is connected with the input end of the dimming control circuit, and the output end of the dimming control circuit is connected with the controlled end of the LED driving power supply;

the main control chip is used for outputting a color modulation control signal to the color modulation control circuit and outputting a light modulation control signal to the light modulation control circuit;

the color modulation control circuit is used for receiving the color modulation control signal and respectively adjusting the duty ratio of the cold color temperature LED and the duty ratio of the warm color temperature LED;

the dimming control circuit is used for receiving the dimming control signal, generating a dimming control voltage and sending the dimming control voltage to the LED driving power supply;

and the LED driving power supply is used for receiving the dimming control voltage and adjusting the power supply voltage of the cold color temperature LED and the warm color temperature LED.

Optionally, the color adjusting control circuit comprises a cold color temperature control circuit and a warm color temperature control circuit;

the cold color temperature control circuit comprises a first triode, a second triode and a first MOS (metal oxide semiconductor) tube, wherein the base electrode of the first triode is connected with the color mixing output end of the main control chip, the collector electrode of the first triode is connected with a high level, the emitter electrode of the first triode is grounded, the base electrode of the second triode is connected with a high level, the collector electrode of the second triode is respectively connected with the collector electrode of the first triode and the grid electrode of the first MOS tube, the emitter electrode of the second triode is grounded, the drain electrode of the first MOS tube is connected with the negative electrode of the cold color temperature LED, the source electrode of the first MOS tube is grounded, and the positive electrode of the cold color temperature LED is connected with the first output end of the LED driving power supply;

the warm color temperature control circuit comprises a third triode, a fourth triode and a second MOS (metal oxide semiconductor) tube, wherein the base electrode of the third triode is connected with the color mixing output end of the main control chip, the collector electrode of the third triode is connected with a high level, the emitter electrode of the third triode is grounded, the base electrode of the fourth triode is connected with the collector electrode of the third triode, the collector electrode of the fourth triode is connected with the high level, the emitter electrode of the fourth triode is grounded, the grid electrode of the second MOS tube is connected with the collector electrode of the fourth triode, the drain electrode of the second MOS tube is connected with the negative electrode of the warm color temperature LED, the source electrode of the second MOS tube is grounded, and the positive electrode of the warm color temperature LED is connected with the first output end of the LED driving power supply;

the first triode, the second triode, the third triode and the fourth triode are NPN type triodes, and the first MOS tube and the second MOS tube are PMOS tubes.

Optionally, the color adjusting control circuit further includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a sixth resistor;

the color-mixing output end of the main control chip is connected with the base electrode of the first triode through the first resistor, the base electrode of the first triode is connected with the emitting electrode of the first triode through the third resistor, and the collecting electrode of the first triode is connected with a high level through the fifth resistor;

the color-mixing output end of the main control chip is connected with the base electrode of the third triode through the second resistor, the base electrode of the third triode is connected with the emitting electrode of the third triode through the fourth resistor, and the collecting electrode of the third triode is connected with a high level through the sixth resistor.

Optionally, the toning control circuit further comprises a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, and a twelfth resistor;

the collector electrode of the second triode is grounded through the seventh resistor, and is connected with the grid electrode of the first MOS tube through the eighth resistor;

the base electrode of the fourth triode is connected with the emitting electrode of the fourth triode through a ninth resistor, the collector electrode of the fourth triode is connected with a high level through a tenth resistor, the collector electrode of the fourth triode is grounded through an eleventh resistor, and the collector electrode of the fourth triode is further connected with the grid electrode of the second MOS tube through a twelfth resistor.

Optionally, the color-adjusting control circuit further includes a thirteenth resistor, and a base of the second triode is connected to the switch control end of the main control chip through the thirteenth resistor;

the main control chip is also used for outputting high level or low level through the switch control end.

Optionally, the dimming control circuit further includes a filter circuit and an amplifier circuit, an input end of the filter circuit is connected with the dimming output end of the main control chip, an output end of the filter circuit is connected with an input end of the amplifier circuit, and an output end of the amplifier circuit is connected with the controlled end of the LED driving power supply;

the filter circuit is used for converting the PWM dimming signal output by the main control chip into a direct-current voltage-stabilizing signal;

the amplifying circuit is used for amplifying the direct current voltage stabilizing signal to obtain the dimming control voltage.

Optionally, the LED dimming and color mixing circuit further includes a state detection circuit connected to the main control chip, and the state detection circuit is configured to detect currents and voltages of the cold color temperature LED and the warm color temperature LED and send current data and voltage data to the main control chip.

Optionally, the LED dimming and color mixing circuit further comprises a communication module connected to the main control chip, wherein the communication module is used for receiving a control signal sent by the server and sending the control signal to the main control chip, and sending the LED status data detected by the main control chip to the server, and the LED status data is the current and voltage of the cold color temperature LED and the warm color temperature LED and the current data and voltage data.

Optionally, the LED dimming and color-adjusting circuit further includes a dc conversion circuit, an input end of the dc conversion circuit is connected to the second output end of the LED driving power supply, and an output end of the dc conversion circuit is connected to a power supply end of the main control chip;

the direct current conversion circuit is used for converting direct current voltage output by the second output end of the LED driving power supply into working voltage of the main control chip.

Furthermore, in order to realize the above object, the utility model also provides a LED mixing of colors device of adjusting luminance, LED adjust luminance mixing of colors device include with mains connection's LED adjust luminance mixing of colors circuit, LED adjust luminance mixing of colors circuit configuration is as above LED adjust luminance mixing of colors circuit.

The utility model discloses a set up a LED drive power supply, can supply power for cold colour temperature LED and warm colour temperature LED simultaneously. The main control chip can adjust the duty ratio of the cold color temperature LED and the warm color temperature LED through the color adjusting control signal so as to adjust the color temperature of the LEDs. The main control chip can also adjust the power supply voltage output by the LED driving power supply to the cold color temperature LED and the warm color temperature LED through the dimming control signal, so that the brightness of the LED lamp is adjusted. And only one LED driving power supply can be installed in the LED lamp, so that the size of an electronic device in the lamp is effectively reduced, and the circuit cost of the LED lamp is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed 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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic block diagram of an embodiment of the LED dimming and color mixing circuit of the present invention;

FIG. 2 is a schematic diagram of a cold color temperature control circuit according to the embodiment of FIG. 1;

fig. 3 is a schematic diagram of a warm color temperature control circuit in the embodiment of fig. 1.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

The reference numbers illustrate:

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The technical solutions in the embodiments of the present invention will be described clearly and completely 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 efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a LED mixing of colors circuit of adjusting luminance is applied to LED and adjusts luminance the mixing of colors device, and this LED is adjusted luminance the mixing of colors device and can be realized adjusting luminance and mixing of colors of LED lamp.

Referring to fig. 1, in an embodiment, the LED dimming and color-adjusting circuit includes a cold color temperature LED50, a warm color temperature LED60, a main control chip 10, a color-adjusting control circuit 20, a dimming control circuit 30, and an LED driving power source 40. The input end of the LED driving power supply 40 is connected with the mains supply, and the first output end of the LED driving power supply 40 is respectively connected with the cold color temperature LED50 and the warm color temperature LED 60. The LED driving power source 40 may convert the commercial power into a dc voltage to power the cold color temperature LED50 and the warm color temperature LED 60.

The color-mixing output end of the main control chip 10 is connected with the input end of the color-mixing control circuit 20, two output ends of the color-mixing control circuit 20 are respectively connected with the controlled ends of the cold color temperature LED50 and the warm color temperature LED60, the dimming output end of the main control chip 10 is connected with the input end of the dimming control circuit 30, and the output end of the dimming control circuit 30 is connected with the controlled end of the LED driving power supply 40.

The main control chip 10 may output a color-mixing control signal to the color-mixing control circuit 20, and when receiving the color-mixing control signal, the color-mixing control circuit 20 may adjust the duty ratio of the cold-color-temperature LED50 and the duty ratio of the warm-color-temperature LED60 according to the color-mixing control signal. That is, when the duty ratio of the cold color temperature LED50 is increased, the duty ratio of the warm color temperature LED60 is correspondingly decreased; when the duty ratio of the warm color temperature LED60 is increased, the duty ratio of the cold color temperature LED50 is correspondingly decreased, thereby adjusting the color temperature of the LED.

The main control chip 10 may further send a dimming control signal to the dimming control circuit 30, when receiving the dimming control signal, the dimming control circuit 30 may generate a corresponding dimming control voltage according to the dimming control signal, and send the dimming control voltage to the LED driving power source 40, and when receiving the dimming control voltage, the LED driving power source 40 may adjust the power supply voltages of the cold color temperature LED50 and the warm color temperature LED60 according to the dimming control voltage. For example, when the dimming control voltage is the lowest value within the adjustable range, the LED driving power supply 40 may adjust the supply voltages of the cold color temperature LED50 and the warm color temperature LED60 to zero so that the LEDs do not emit light; when the dimming control voltage is the highest value within the adjustable range, the LED driving power supply 40 may adjust the power supply voltages of the cold color temperature LED50 and the warm color temperature LED60 to the highest power supply voltage, so that the brightness of the LED reaches the highest value. That is, as the dimming control voltage increases, the LED driving power supply 40 may increase the supply voltages of the cold color temperature LED50 and the warm color temperature LED60 to achieve an increase in LED brightness. Likewise, as the dimming control voltage decreases, a decrease in LED brightness may be achieved.

In the present embodiment, by providing one LED driving power source 40, power can be supplied to the cold color temperature LED50 and the warm color temperature LED60 at the same time. The main control chip 10 can adjust the duty ratio of the cold color temperature LED50 and the warm color temperature LED60 through the color adjusting control signal, so as to adjust the color temperature of the LEDs. The main control chip 10 can also adjust the power supply voltage output by the LED driving power source 40 to the cold color temperature LED50 and the warm color temperature LED60 through the dimming control signal, thereby adjusting the brightness of the LED lamp. And only one LED driving power supply 40 can be arranged in the LED lamp, so that the size of an electronic device in the lamp is effectively reduced, and the circuit cost of the LED lamp is reduced.

Further, referring to fig. 1 to 3 together, the color-adjusting control circuit 20 may include a cold color temperature control circuit 21 and a warm color temperature control circuit 22. The cold color temperature control circuit 21 comprises a first triode Q1, a second triode Q2 and a first MOS transistor MOS1, wherein the base of the first triode Q1 is connected with the color mixing output end of the main control chip 10, the collector of the first triode Q1 is connected with a high level, the emitter of the first triode Q1 is grounded, the base of the second triode Q2 is connected with a high level, the collector of the second triode Q2 is respectively connected with the collector of the first triode Q1 and the gate of the first MOS transistor MOS1, the emitter of the second triode Q2 is grounded, the drain of the first MOS transistor MOS1 is connected with the negative electrode of the cold color temperature LED50, the source of the first MOS transistor MOS1 is grounded, and the positive electrode of the cold color temperature LED50 is connected with the first output end of the LED driving power supply 40. The warm color temperature control circuit 22 includes a third triode Q3, a fourth triode Q4, and a second MOS2, wherein the base of the third triode Q3 is connected with the color-mixing output terminal of the main control chip 10, the collector of the third triode Q3 is connected with a high level, the emitter of the third triode Q3 is grounded, the base of the fourth triode Q4 is connected with the collector of the third triode Q3, the collector of the fourth triode Q4 is connected with a high level, the emitter of the fourth triode Q4 is grounded, the gate of the second MOS2 is connected with the collector of the fourth triode Q4, the drain of the second MOS2 is connected with the negative electrode of the warm color temperature LED60, the source of the second MOS2 is grounded, and the positive electrode of the warm color temperature LED60 is connected with the first output terminal of the LED driving power supply 40. The first triode Q1, the second triode Q2, the third triode Q3 and the fourth triode Q4 are NPN type triodes, and the first MOS transistor MOS1 and the second MOS transistor MOS2 are PMOS transistors.

When the color modulation control signal output by the main control chip 10 is at a high level, the first triode Q1 is turned on, the collector of the first triode Q1 is at a low level, the gate of the first MOS transistor MOS1 receives the low level, and the first MOS transistor MOS1 is turned off; when the color-adjusting control signal is at a low level, the first transistor Q1 is turned off, the collector of the first transistor Q1 is at a high-level, the gate of the first MOS transistor MOS1 receives the high level, and the first MOS transistor MOS1 is turned on. That is, when the toning control signal output from the main control chip 10 is switched between high and low levels, the first MOS transistor MOS1 is also switched between the off and on states. When the color modulation control signal outputted by the main control chip 10 is a PWM signal, the duty ratio of the PWM signal is opposite to the light emitting duty ratio of the cold color temperature LED 50.

Similarly, when the color-adjusting control signal outputted by the main control chip 10 is at a high level, the third transistor Q3 is turned on, the collector of the third transistor Q3 is at a low level, the base of the fourth transistor Q4 is at a low level, the fourth transistor Q4 is turned off, the collector of the fourth transistor Q4 is at a high level, and the gate of the second MOS2 is turned on when receiving the high level; when the toning control signal is at a low level, the third transistor Q3 is turned off, the fourth transistor Q4 is turned on, the collector of the fourth transistor Q4 is at a low level, and the gate of the second MOS transistor MOS2 is turned off when receiving the low level. That is, in contrast to the cold color temperature control circuit 21, when the toning control signal output from the main control chip 10 is switched between high and low levels, the first MOS transistor MOS1 is switched between on and off states. That is, when the same PWM signal outputted from the main control chip 10 is received, the first MOS transistor MOS1 and the second MOS transistor MOS2 are completely opposite in conduction state, and accordingly, the duty ratios of the cold color temperature LED50 and the warm color temperature LED60 are also opposite. That is, when the duty ratio of the PWM signal is 40%, the duty ratio of the cold color temperature LED50 is 60%, and the duty ratio of the warm color temperature LED60 is 40%. That is, as the duty cycle of the cold color temperature LED50 increases, the duty cycle of the warm color temperature LED60 correspondingly decreases; on the other hand, when the duty ratio of the warm color temperature LED60 increases, the duty ratio of the cold color temperature LED50 decreases accordingly. The main control chip 10 outputs a same PWM signal, so that the duty ratios of the cold color temperature LED50 and the warm color temperature LED60 can be adjusted in an opposite manner, thereby adjusting the color temperature of the LEDs.

Further, the above-described toning control circuit 20 may further include a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a sixth resistor. The color-adjusting output end of the main control chip 10 is connected with the base electrode of the first triode Q1 through a first resistor R1, the base electrode of the first triode Q1 is connected with the emitter electrode of the first triode Q1 through a third resistor R3, and the collector electrode of the first triode Q1 is connected with a high level through a fifth resistor R5. The color-adjusting output end of the main control chip 10 is connected with the base of a third triode Q3 through a second resistor R2, the base of the third triode Q3 is connected with the emitter of a third triode Q3 through a fourth resistor R4, and the collector of the third triode Q3 is connected with a high level through a sixth resistor R6.

It can be understood that the first resistor R1 and the second resistor R2 are current limiting resistors, and can prevent the first transistor Q1 and the second transistor Q2 from being damaged due to excessive current. The third resistor R3 and the fourth resistor R4 are bias resistors, and can provide bias voltage for the base of the first transistor Q1 and the base of the second transistor Q2, so that the first transistor Q1 and the second transistor Q2 can be turned off and on stably. The fifth resistor R5 and the sixth resistor R6 are also current limiting resistors, and can prevent the first transistor Q1 and the second transistor Q2 from being damaged by excessive high-level output current.

Further, the toning control circuit 20 may further include a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, and a twelfth resistor R12. The collector of the second transistor Q2 is grounded through a seventh resistor R7, and the collector of the second transistor Q2 is connected with the gate of the first MOS transistor MOS1 through an eighth resistor R8. The base of the fourth triode Q4 is connected with the emitter of the fourth triode Q4 through a ninth resistor R9, the collector of the fourth triode Q4 is connected with high level through a tenth resistor R10, the collector of the fourth triode Q4 is grounded through an eleventh resistor R11, and the collector of the fourth triode Q4 is also connected with the gate of the second MOS transistor MOS2 through a twelfth resistor R12.

The seventh resistor R7 is a ground resistor, which can prevent the current in the circuit from being too large, and the eighth resistor R8, the tenth resistor R10, the eleventh resistor R11 and the twelfth resistor R12 are current-limiting resistors, which are used to protect the circuit device when the current is too large. The ninth resistor R9 is a bias resistor and can provide a bias voltage for the base of the fourth transistor Q4, so that the fourth transistor Q4 can be turned off and on stably.

Further, the color modulation control circuit 20 may further include a thirteenth resistor R13, and a base of the second transistor Q2 is connected to the switch control terminal of the main control chip 10 through the thirteenth resistor R13. It can be understood that when the color-adjusting control signal outputted by the main control chip 10 is at a low level, the second MOS transistor MOS2 is in an off state, and the warm-color-temperature LED60 is considered to be off, while the first MOS transistor MOS1 and the second MOS transistor MOS2 are in an opposite state, and are in an on state, and the cold-color-temperature LED50 is still in an on state. That is, when the receiving terminal of the cold color temperature control circuit 21, i.e., the base of the first transistor Q1, is turned off, the cold color temperature LED50 is still turned on. Therefore, the main control chip 10 can also control the on and off of the second transistor Q2 through the switch control terminal, that is, when the main control chip 10 sends a high level to the base of the second transistor Q2, the second transistor Q2 is turned on, and at this time, the collector of the second transistor Q2 is at a low level, the gate of the first MOS transistor MOS1 is also at a low level, and the first MOS transistor MOS1 is turned off. That is, when the color-adjusting control signal outputted from the main control chip 10 is at a low level, a high-level signal is also required to be sent to the base of the second transistor Q2 to turn off the cold-color-temperature LED50 and the warm-color-temperature LED60 at the same time.

Further, the dimming control circuit 30 may further include a filter circuit 31 and an amplifier circuit 32, an input end of the filter circuit 31 is connected to the dimming output end of the main control chip 10, an output end of the filter circuit 31 is connected to an input end of the amplifier circuit 32, and an output end of the amplifier circuit 32 is connected to the controlled end of the LED driving power source 40. The filter circuit 31 may be an RC low-pass filter, and when the dimming control signal output by the main control chip 10 is a PWM signal, the PWM dimming signal may be converted into a dc voltage-stabilizing signal, and the main control chip 10 may adjust the duty ratio of the PWM signal, so as to adjust the voltage of the dc voltage-stabilizing signal. The amplifying circuit 32 may amplify the dc regulated signal to obtain a dimming control voltage that conforms to the dimming voltage range of the LED driving power source 40. For example, the filter circuit 31 may convert the PWM signal into a dc regulated signal of 0-5V and amplify it into a dimming control voltage of 0-10V through the amplifying circuit 32. The LED driving power supply 40 can adjust the supply voltage of the cold color temperature LED50 and the warm color temperature LED60 according to the dimming control voltage, so as to adjust the brightness of the LEDs.

Further, the LED dimming and color-adjusting circuit may further include a state detection circuit 70 connected to the main control chip 10, and the state detection circuit 70 may detect the current and voltage of the cold color temperature LED50 and the warm color temperature LED60 and transmit corresponding current data and voltage data to the main control chip 10.

Further, the LED dimming and color tuning circuit may further include a communication module 80 connected to the main control chip 10, and the communication module 80 may perform communication interaction with a remote server or a remote concentrator, receive a control signal sent by the server and send the control signal to the main control chip 10, and may also send LED status data detected by the main control chip 10 to the server. Among them, the LED state data may be current data and voltage data of the cold color temperature LED50 and the warm color temperature LED 60.

Further, the LED dimming and color adjusting circuit may further include a dc conversion circuit 90, an input end of the dc conversion circuit 90 is connected to the second output end of the LED driving power source 40, and an output end of the dc conversion circuit 90 is connected to a power supply end of the main control chip 10. The first output terminal of the LED driving power source 40 may provide a power supply voltage for the cold color temperature LED50 and the warm color temperature LED60, the second output terminal of the LED driving power source 40 may output a stable dc voltage, and the dc conversion circuit 90 may convert the dc voltage into a working voltage of the main control chip 10 to supply power to the main control chip 10. For example, the second output terminal of the LED driving power source 40 may output 12V dc voltage, and the dc conversion circuit 90 may convert the 12V dc voltage into 5V dc voltage to supply power to the main control chip 10.

Further, the LED dimming and color-adjusting circuit may further include an operational amplifier chip, which may be an LM 358-type dual operational amplifier, a first operational amplifier circuit 32 of the dual operational amplifier is the amplifier circuit 32, which may amplify the dc voltage-stabilizing signal after the PWM dimming signal outputted by the main control chip 10 is converted, and a second operational amplifier circuit 32 may be connected to the state detection circuit 70, and amplify the current data of the cold color temperature LED50 and the warm color temperature LED60 detected by the state detection circuit 70 and output the amplified current data to the main control chip 10, so that the main control chip 10 collects the current data and returns the current data to the remote server.

The utility model provides a LED mixing of colors device of adjusting luminance, this LED adjust luminance mixing of colors device include with mains connection's LED adjust luminance mixing of colors circuit, and above-mentioned embodiment can be referred to this LED structure of adjusting luminance mixing of colors circuit, no longer gives unnecessary details here. It should be understood that, since the LED dimming and color-adjusting device of the present embodiment adopts the above technical solution of the LED dimming and color-adjusting circuit, the LED dimming and color-adjusting device has all the advantages of the above LED dimming and color-adjusting circuit.

The above is only the optional embodiment of the present invention, and not therefore the scope of the present invention is limited, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.

Claims

1. An LED dimming and color-adjusting circuit, comprising: the LED driving circuit comprises a cold color temperature LED, a warm color temperature LED, a main control chip, a color modulation control circuit, a light modulation control circuit and an LED driving power supply;

2. The LED dimming and toning circuit of claim 1, wherein the toning control circuit comprises a cold color temperature control circuit and a warm color temperature control circuit;

3. The LED dimming and toning circuit of claim 2, wherein the toning control circuit further comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a sixth resistor;

4. The LED dimming and toning circuit of claim 2, wherein the toning control circuit further comprises a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, and a twelfth resistor;

5. The LED dimming and color adjusting circuit according to claim 4, wherein the color adjusting control circuit further comprises a thirteenth resistor, and the base of the second triode is connected to the switch control terminal of the main control chip through the thirteenth resistor;

6. The LED dimming and color adjusting circuit according to claim 1, wherein the dimming control circuit further comprises a filter circuit and an amplifier circuit, an input end of the filter circuit is connected with the dimming output end of the main control chip, an output end of the filter circuit is connected with an input end of the amplifier circuit, and an output end of the amplifier circuit is connected with a controlled end of the LED driving power supply;

7. The LED dimming and color adjusting circuit according to any one of claims 1 to 6, further comprising a state detection circuit connected to the main control chip, wherein the state detection circuit is used for detecting the current and voltage of the cold color temperature LED and the warm color temperature LED and sending the current data and voltage data to the main control chip.

8. The LED dimming and color tuning circuit of claim 7, further comprising a communication module connected to the main control chip, wherein the communication module is configured to receive a control signal from a server and send the control signal to the main control chip, and send LED status data detected by the main control chip to the server, wherein the LED status data is current data and voltage data of the cold color temperature LED and the warm color temperature LED.

9. The LED dimming and color mixing circuit according to any one of claims 1 to 6, further comprising a DC conversion circuit, wherein an input terminal of the DC conversion circuit is connected to the second output terminal of the LED driving power supply, and an output terminal of the DC conversion circuit is connected to a power supply terminal of the main control chip;

10. An LED dimming and color-mixing device, comprising an LED dimming and color-mixing circuit connected with mains supply, wherein the LED dimming and color-mixing circuit is configured as the LED dimming and color-mixing circuit according to any one of claims 1-9.