CN113163541A

CN113163541A - LED dimming control circuit and LED lamp

Info

Publication number: CN113163541A
Application number: CN202110188844.3A
Authority: CN
Inventors: 万叶华; 桂裕中; 张坚; 方荣; 吴波
Original assignee: Sengled Co Ltd
Current assignee: Sengled Co Ltd
Priority date: 2021-02-19
Filing date: 2021-02-19
Publication date: 2021-07-23
Also published as: WO2022174697A1

Abstract

The application provides an LED dimming control circuit and an LED lamp. The LED dimming control circuit comprises a rectifying module, a dimming module, an LED module and a resistive load module. The rectification module is used for converting commercial power into direct current; the dimming module is used for receiving and processing the direct current, receiving a dimming instruction sent by an external controller and generating an LED regulation control signal according to the dimming instruction; the LED module comprises an LED light-emitting element and an LED control circuit connected with the LED light-emitting element, and the LED control circuit is used for driving the LED light-emitting element according to the LED regulation and control current; the resistive load module is used for detecting the voltage at two ends of the LED module, and when the voltage at two ends of the LED module is smaller than or equal to the preset voltage, the resistive load module is switched on. The LED dimming control circuit and the LED lamp can solve the problems that the existing LED dimming circuit cannot deeply dim the LED or the deep dimming mode is complex, the electric energy is wasted, and the use effect of the LED is poor.

Description

LED dimming control circuit and LED lamp

Technical Field

The application relates to the LED lighting technology, in particular to an LED dimming control circuit and an LED lamp.

Background

A Light Emitting Diode (LED) is a semiconductor Diode that can convert electrical energy into optical energy, and is widely used in daily life. In daily use of the LED, the light emitting intensity of the LED often needs to be adjusted according to different installation scenes, which is called dimming for short.

The existing dimming circuit of the LED can carry out deep dimming on the LED, but has the problems that the effect of deep dimming is poor or the mode for realizing the deep dimming is complex, the LED cannot meet the ideal dimming requirement, and the electric energy is wasted. The deep dimming is a light emission requirement for minimizing the brightness of the LED, i.e. the LED is still in a light emitting state, but the brightness is very low. For example, corridor lights in a room, illumination lights in a toilet, etc., are required to be in a lighted state before a resident passes through a corridor or uses the toilet at night, so as to avoid situations that the resident cannot move forward in a completely dark environment or trip down during moving forward, etc. The illuminating lamps only need to be in the lightening state which can enable workers to see the environment clearly, the lightening state with strong brightness is not needed, the illuminating lamps are in the lowest lightening requirement at the moment, and the state without wasting electric energy can be called as a deep dimming state.

Therefore, a dimming control circuit of an LED needs to be designed to solve the problems that the existing LED dimming circuit cannot perform deep dimming on the LED or the deep dimming mode is complex, the electric energy is wasted, and the use effect of the LED is poor.

Disclosure of Invention

The application provides a LED dimming control circuit and LED lamps and lanterns for solve current LED dimming circuit and can't carry out the degree of depth to LED and adjust luminance, cause the electric energy extravagant, the poor problem of LED result of use.

In one aspect, the present application provides an LED dimming control circuit, including:

the rectifier module is used for accessing commercial power and converting the commercial power into direct current;

the dimming module is connected with the output end of the rectifying module and is used for receiving and processing the direct current; the dimming module is also used for receiving a dimming instruction sent by an external controller and responding to the dimming instruction to generate an LED regulation control signal;

the LED module comprises an LED light-emitting element and an LED control circuit connected with the LED light-emitting element, and the LED control circuit is connected with the dimming module; the LED control circuit is used for generating corresponding LED regulation and control current according to the LED regulation and control signal to drive the luminous intensity of the LED luminous element;

the two ends of the resistive load module are respectively connected with the dimming module and the LED module, the resistive load module is used for detecting the voltage at the two ends of the LED module, and when the voltage at the two ends of the LED module is smaller than or equal to the preset voltage, the resistive load module is conducted.

In one embodiment, the resistive load module includes:

the resistive load unit comprises at least one resistive load, and one end of the resistive load unit is connected with one end of the LED module;

the second control unit is connected with the resistive load unit, one end of the second control unit is connected with one end of the resistive load unit, and the other end of the second control unit is connected with one end of the LED module; the second control unit is used for detecting the voltages at the two ends of the LED module, and when the voltages at the two ends of the LED module are smaller than or equal to the preset voltage, the resistive load unit is conducted.

In one embodiment, the dimming module comprises:

the first control unit is used for receiving and responding to the dimming instruction and generating an LED regulation control signal;

and the power supply unit is used for receiving and processing the direct current and providing a working power supply for the first control unit, the LED module and the resistive load module.

In one embodiment, the method further comprises the following steps:

and the input end of the filtering module is connected with the output end of the rectifying module, and the output end of the filtering module is connected with the dimming module.

In one embodiment, the LED module includes multiple paths of LED light emitting elements with different color temperatures, the LED control circuit is connected to the multiple paths of LED light emitting elements with different color temperatures, and controls the brightness and time ratio of each path of LED light emitting element to obtain different color temperatures, thereby achieving color modulation of the circuit.

In one embodiment, the LED control circuit is a linear constant current control circuit.

In another aspect, the present application provides an LED lamp, including the LED dimming control circuit according to the first aspect, further including:

and the external controller is used for receiving and transmitting a user instruction and generating the dimming instruction according to the user instruction.

In one embodiment, the external controller includes a communication module, and the communication module is configured to send the dimming command to the dimming module.

The LED dimming control circuit provided by this embodiment includes a rectifying module, a dimming module, an LED module, and a resistive load module. The rectification module converts commercial power into direct current and transmits the direct current to the dimming module, and the dimming module receives and processes the direct current. The dimming module is further used for responding to the received dimming instruction, generating an LED regulation control signal, and generating corresponding LED regulation current according to the LED regulation control signal by the LED module to drive the luminous intensity of the LED luminous element. When the magnitude of the LED regulation current reaches a certain current value, the voltage at two ends of the LED module is correspondingly LED to a certain voltage value, and the certain voltage value meets the condition that the certain voltage value is less than or equal to the preset voltage, the resistive load module is conducted, so that the lower dimming limit of the LED light-emitting element is further optimized, and the LED light-emitting element enters a deep dimming mode. Therefore, a user can operate the external controller to send the dimming instruction to the dimming module, the LED is controlled to regulate and control current through the dimming instruction, and then whether the LED light-emitting element enters a deep dimming state or not is controlled, and after the LED light-emitting element enters the deep dimming state, the LED light-emitting element is in a light-emitting state under low energy consumption. Therefore, the LED dimming control circuit provided by the embodiment can solve the problems that the existing LED dimming circuit has poor effect when carrying out deep dimming on the LED, the electric energy is wasted, and the LED using effect is poor.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram of an LED dimming control circuit according to an embodiment of the present application.

Fig. 2 is a schematic diagram of Triac dimming of an LED in the prior art according to an embodiment of the present application.

Fig. 3 is a schematic diagram of an LED corresponding to the LED dimming control circuit according to an embodiment of the present application, where the Triac dimming is implemented to perform deep dimming.

Fig. 4 is a schematic diagram of an LED dimming control circuit according to another embodiment of the present application.

Fig. 5 is a schematic diagram of an LED dimming control circuit according to another embodiment of the present application.

Fig. 6 is a schematic diagram of an LED lamp provided in an embodiment of the present application.

Description of the reference numerals

LED dimming control circuit 10

Rectifier module 100

Dimming module 200

First control unit 210

Power supply unit 220

LED Module 300

LED light emitting element 310

LED control circuit 320

Resistive load module 400

Resistive load cell 410

Load 411

Second control unit 420

Filtering module 500

External controller 20

Communication module 21

LED light fitting 30

With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The existing dimming circuit of a Light Emitting Diode (LED) has a poor deep dimming effect on the LED, that is, the LED cannot meet the minimum Light Emitting requirement when it needs to emit Light, so that the dimming requirement cannot be met and the power is wasted.

Based on this, the present application provides an LED dimming control circuit 10, which adds a module capable of consuming current, thereby reducing the current passing through the LED, further weakening the luminance of the LED, and achieving the purpose of deep dimming of the LED.

Referring to fig. 1, the present application provides an LED dimming control circuit 10, which includes a rectifying module 100, a dimming module 200, an LED module 300, and a resistive load module 400.

The rectifying module 100 is used for connecting to a commercial power and converting the commercial power into a direct current. The commercial power is power frequency alternating current, and the rectifier module 100 may be a rectifier circuit or a rectifier as long as alternating current can be converted into direct current. When the rectifier module 100 is a rectifier, the rectifier can be made of vacuum tube, ignition tube, solid silicon semiconductor diode, mercury arc, etc. The rectifier mainly functions to convert ac power into dc power, and the dc power is filtered and supplied to the dimming module 200. Specifically, the specification and the model of the rectifier can be selected according to actual needs.

When the rectifier module 100 is a rectifier circuit, the rectifier circuit may be composed of a transformer, a rectifier main circuit, a filter, or the like, or may be composed of a silicon rectifier diode and a thyristor. The rectifying circuit is used for realizing matching between alternating current input voltage and direct current output voltage and isolation between an alternating current power grid and the rectifying circuit, and is also used for converting alternating current with lower voltage output by the alternating current voltage reduction circuit into unidirectional pulsating direct current. The voltage after passing through the rectifying circuit is not an alternating voltage, but a mixed voltage containing a direct voltage and an alternating voltage, and the mixed voltage can be called a unidirectional pulsating direct voltage. The rectification circuit can be one of half-wave rectification, full-wave bridge rectification, voltage-doubling rectification and the like, and can be selected according to actual needs, and the application is not limited.

The dimming module 200 is connected to an output terminal of the rectifying module 100. The dimming module 200 is configured to receive and process the dc power, and is further configured to receive a dimming command sent by the external controller 20, and generate an LED control signal in response to the dimming command. That is, the dimming module 200 has a communication unit, which can be in signal connection with the external controller 20, for receiving a dimming command sent by the external controller 20, wherein the dimming command is input to the external controller 20 by a user. The external controller 20 is, for example, a remote controller, a mobile phone, or the like.

The dimming module 200 is, for example, a dimming circuit with a communication function. The dimming circuit can be a silicon controlled dimming circuit, a thyristor dimming circuit, an electrodeless dimming circuit or other types of dimming circuits, as long as the direct current can be converted into the LED regulation current according to the dimming instruction and then output, and the LED regulation current can be understood as the effective current of the direct current.

Referring to fig. 4 or fig. 5, the LED module 300 includes an LED light emitting element 310 and an LED control circuit 320. The LED control circuit 320 is connected to the output end of the dimming module 200, and after receiving the LED control signal output by the dimming module 200, the LED control circuit 320 generates a corresponding LED control current according to the LED control signal to drive the light emitting intensity of the LED light emitting element 310. That is, the light emission luminance of the LED light emitting element 310 is controlled. The LED control circuit 320 can also control the LED lighting element 310 to be turned on and off according to the LED control current.

The LED control circuit 320 may, for example, drive a single chip microcomputer of the LED light emitting element 310 to emit light, and the type and specification of the single chip microcomputer may be selected according to actual needs, which is not limited in this application. The LED light emitting element 310 is an LED lamp bead, in an optional embodiment, the LED light emitting element 310 may include multiple paths of LED lamp beads connected in parallel, and the specifications and models of the multiple paths of LED lamp beads connected in parallel may be the same or different, which is not limited in this application.

When the LED lighting element 310 includes multiple paths of LED beads connected in parallel, the multiple paths of LED beads connected in parallel are respectively connected to the LED control circuit 320. This LED light emitting component 310 also can be LED lamp pearl all the way, and the specification and the model of LED lamp pearl can be selected according to actual need, and this application does not do the restriction. Optionally, the LED control circuit 320 may also be connected to one of the LED lamp beads 310, that is, the LED control circuit 320 controls one of the LED light emitting elements 310.

In an optional embodiment, the LED module 300 may also include multiple paths of LED light emitting elements 310 with different color temperatures, the LED control circuit 320 is connected to the multiple paths of LED light emitting elements 310 with different color temperatures, and the LED control circuit 320 may control the brightness and the time ratio of each path of LED light emitting element 310 to obtain different color temperatures, so as to implement color matching of the circuit. That is, the LED control circuit 320 can change the color temperature of the light emitted by the entire LED module 300 by controlling the light emitting brightness of each LED light emitting element 310, so that the observer can observe light of different colors. For example, the plurality of LED light emitting elements 310 with different color temperatures may include blue LEDs, green LEDs, red LEDs, white LEDs, and the like, and the white LEDs include single-chip white LEDs, multi-chip LEDs, and the multi-chip LEDs include double-chip LEDs, three-chip LEDs, and four-chip LEDs.

Optionally, the LED control circuit 320 may be a linear constant current control circuit, and the linear constant current control circuit may enable the voltage at two ends of the LED light emitting element 310 to be kept substantially unchanged, and the junction temperature of the LED light emitting element 310 is low in a long time period, and the junction temperature of a single LED light emitting element 310 is substantially unchanged or slightly changed, so as to ensure that the junction temperature of the LED light emitting element 310 is stable and smaller, reduce the light attenuation of the LED light emitting element 310, and effectively improve the service life of the LED light emitting element 310.

The resistive load module 400, i.e., the resistive load circuit, includes a purely resistive load that operates only through resistive-type elements. Specifically, the LED light emitting element 310 in the LED module 300 is connected to the LED control circuit 320, and the two ends of the resistive load module 400 are connected to one end of the LED light emitting element 310 and one end of the LED control circuit 320 respectively.

The resistive load module 400 has a voltage detection function, and is configured to detect voltages at two ends of the LED module 300, and when the voltages at the two ends of the LED module 300 are correspondingly applied to a certain voltage value, and the certain voltage value is smaller than or equal to a preset voltage, the resistive load module 400 is turned on, a part of the LED control current flows into the resistive load module 400, and a current flowing through the LED light emitting element 310 is another part of the LED control current. After the current flowing through the LED lighting element 310 is reduced, the brightness of the LED lighting element 310 is reduced, and at this time, the LED lighting element 310 is in a deep dimming state, the lower dimming limit of the LED lighting element 310 is further optimized, and the proportion of the minimum current flowing through the LED lighting element 310 in the LED regulation current approaches to 0%. When the voltage across the LED module 300 is greater than or equal to the predetermined voltage, the current passing through the LED light emitting element 310 is the LED control current, and the LED light emitting element 310 is in a normal control state.

Referring to fig. 2 and fig. 3, fig. 2 is a schematic diagram of Triac dimming of an LED in the prior art, and it can be seen that in fig. 2, as the dimming angle increases, the magnitude of the current flowing through the LED light emitting device 1 and the LED light emitting device 2 cannot approach 0. Fig. 3 is a schematic diagram of the triac ric dimming implementation of the LED corresponding to the LED dimming control circuit provided in this embodiment to implement deep dimming, and as the dimming angle decreases in fig. 3, the current passing through the LED light emitting element 1 and the LED light emitting element 2 approaches 0. The LED light-emitting element 1 and the LED light-emitting element 2 refer to two lamp beads connected in parallel, and the dimming angle can be understood as dimming level. The larger the LED regulating current is, the lower the corresponding dimming level is, and the larger the corresponding dimming angle is. The smaller the LED regulating current is, the higher the corresponding dimming level is, and the smaller the corresponding dimming angle is.

As can be seen from a comparison between fig. 2 and fig. 3, in the LED dimming control circuit provided in this embodiment, as the dimming level increases, that is, as the LED control current decreases, the current passing through the LED light emitting elements 1 and 2 approaches to 0, and both the LED light emitting elements 1 and 2 are in the deep dimming state. The LED light emitting elements 1 and 2 are two light emitting diodes connected in parallel and connected to the LED control circuit 320.

In summary, the LED dimming control circuit 10 provided in this embodiment includes a rectifying module 100, a dimming module 200, an LED module 300, and a resistive load module 400. The rectifying module 400 converts the commercial power into a direct current and transmits the direct current to the dimming module 200, the dimming module 200 responds to the received dimming instruction and then generates an LED control signal, and the LED module generates a corresponding LED control current according to the LED control signal to drive the light emitting intensity of the LED light emitting element. When the voltage across the LED module 300 is less than or equal to the predetermined voltage, the resistive load module 400 is turned on, so that the brightness of the LED light emitting device 310 is further reduced, and the LED light emitting device enters a deep dimming mode. Therefore, a user can operate the external controller 20 to send the dimming command to the dimming module 200, so that the dimming module 200 generates an LED control signal after responding to the dimming command, and the LED module generates a corresponding LED control current according to the LED control signal to drive the light emitting intensity of the LED light emitting element, so as to control whether the LED light emitting element 310 enters a deep dimming state, and when the LED light emitting element 310 enters the deep dimming state, the LED light emitting element 310 is in a light emitting state with low energy consumption. Therefore, the LED dimming control circuit 10 provided in this embodiment can solve the problems that the existing LED dimming circuit cannot perform deep dimming on the LED, which causes electric energy waste and the LED usage effect is poor.

Referring to fig. 4, in one embodiment of the present application, the resistive load module 400 includes a resistive load unit 410 and a second control unit 420.

The resistive load unit 410 includes at least one resistive load 411, and the resistance value, specification, and model of the resistive load 411 may be selected according to actual needs, which is not limited in this application. The resistive load refers to a pure resistive load that operates only through a resistor-type element. When the resistive load unit 410 includes a plurality of the resistive loads 411, the plurality of the resistive loads 411 are connected in parallel to constitute the resistive load unit 410. One end of the resistive load unit 410 is connected to one end of the LED module 300, and in an alternative embodiment, one end of the resistive load unit 410 may be connected to one end of the LED light emitting element 310, where one end of the LED light emitting element 310 refers to one end of the two ends of the LED light emitting element 310 that is not connected to the LED control circuit 320.

The second control unit 420 is connected to the resistive load unit 410, and when the resistive load unit 410 includes a plurality of resistive loads 411 connected in parallel, the plurality of resistive loads 411 connected in parallel are all connected to the second control unit 420. That is, one end of the second control unit 420 is connected to the other end of the resistive load unit 410, and the other end of the second control unit 420 is connected to one end of the LED module 300. Here, one end of the LED module 300 may be one end of the LED control circuit, which refers to one end of the LED control circuit that is not connected to the LED light emitting element 310. Optionally, one of the second control units 420 is connected to one of the resistive loads 411, that is, one of the second control units 420 controls whether one of the resistive loads 411 is connected to a current.

The second control unit 420 is configured to detect a voltage across the LED module 300, that is, detect a voltage signal of the LED light emitting element 310, specifically, the second control unit 420 is provided with the preset voltage value, and when the voltage across the LED module 300 is less than or equal to the preset voltage, the second control unit 420 is turned on. The second control unit 420 is, for example, a single chip or a processor, and the single chip or the controller has a function of detecting a voltage, that is, a voltage across the LED module 300. The single chip microcomputer or the processor also has a function of simple judgment, namely, the voltage at two ends of the LED module 300 is judged, and whether the single chip microcomputer or the processor is conducted or not is controlled according to the judgment result. The single chip microcomputer is a typical embedded microcontroller, is composed of an arithmetic unit, a controller, a memory, input and output equipment and the like, and is equivalent to a microcomputer. In this embodiment, the specification and the model of this singlechip all can be selected according to actual need, and this application does not do the restriction. The specific type of the second control unit 420 can be selected according to actual needs, and is not limited in this application.

In one embodiment of the present application, the dimming module 200 includes a first control unit 210 and a power supply unit 220.

The first control unit 210 is connected to the power supply unit 220, and the first control unit 210 is configured to receive and respond to the dimming command to generate an LED control signal. The power supply unit 220 is configured to receive and process the dc power to provide operating power to the first control unit 210, the LED module 300, and the resistive load module 400. The direct current refers to the direct current output by the rectifying module. The LED module 300 generates a corresponding LED control current according to the LED control signal, and the LED control current is also a dc current. The LED control signal outputs, for example, one half of the direct current as the LED control current, or one quarter of the direct current as the LED control current.

The first control unit 210 is, for example, a single chip microcomputer, which has a communication function and can receive the dimming command sent by the external controller 20. The specification and model of the first control unit 210 can be selected according to actual needs, and the application is not limited.

Referring to fig. 5, in an embodiment of the present application, the LED dimming control circuit 10 further includes a filter module 500, an input terminal of the filter module 500 is connected to the output terminal of the rectifying module 100, and an output terminal of the filter module 500 is connected to the dimming module 200. The filtering module 500, such as a filter or a filtering circuit, can further filter a small amount of ac, ripple, etc. in the dc output from the rectifying module 100, so that the dc input to the dimming module 200 is more pure.

When the filtering module 500 is a filter, the filter may be composed of a capacitor, an inductor, and a resistor, the sensitivity, the characteristic frequency, the damping coefficient, the quality factor, and the like of the filter may be selected according to actual needs, and the specification and the model of the filter may also be selected according to actual needs, which is not limited in the present application.

When the filter module 500 is a filter circuit, the filter circuit may be composed of reactance elements, or may be various complex filter circuits composed of capacitors and inductors. The filtering module 500 may be a passive filtering circuit or an active filtering circuit, classified from the kinds of filtering circuits. If the filter circuit is composed of only passive elements such as resistors, capacitors, inductors, etc., it is called a passive filter circuit. The main forms of passive filtering are capacitive filtering, inductive filtering and complex filtering. The filter circuit is called an active filter circuit if it is composed of not only passive elements but also active elements such as bipolar type tubes, unipolar type tubes, integrated operational amplifiers, and the like. The main form of active filtering is active RC filtering, also called electronic filter.

Referring to fig. 6, the present application further provides an LED lamp 30, which includes the LED dimming control circuit 10 as described above, and further includes the external controller 20, where the external controller 20 is configured to receive a user instruction and generate the dimming instruction according to the user instruction. The external controller 20 includes a communication module 21, and the communication module 21 is configured to send the dimming command to the dimming module 200.

The external controller 20 may be, for example, a remote controller, a mobile phone, or the like that transmits the dimming command to the dimming module 200.

When the external controller 20 is a remote controller mainly composed of an integrated circuit board and buttons for generating various messages, the main element of the emitting part of the remote controller is an infrared light emitting diode. Correspondingly, the dimming module 200 is provided with an infrared receiver, the infrared receiver converts the received infrared signal into an electrical signal, and the first control unit 210 demodulates the electrical signal, demodulates the corresponding command, and then executes the corresponding action. In this embodiment, the first control unit 210 demodulates the dimming command from the electrical signal and then controls the light emitting brightness of the LED light emitting element 310.

When the external controller 20 is a mobile phone or other terminal devices, a software application for controlling the light emission of the LED light emitting element 310 may be set on the mobile phone, a corresponding function key for controlling the light emission brightness of the LED light emitting element 310 may be set on the software application, and a worker may generate the dimming instruction by clicking the corresponding key and send the dimming instruction to the dimming module 200.

When the external controller 20 is a remote controller, the communication module 21 may be an infrared light emitting diode, and correspondingly, the dimming module 200 is provided with an infrared receiver.

When the external controller 20 is a mobile phone or other terminal device, the communication module 21 may be a bluetooth communication module, and correspondingly, the dimming module 200 is provided with a module capable of receiving data through bluetooth. The communication module 21 may also be a wired communication module, such as a network cable, and the dimming module 200 is correspondingly provided with an interface for receiving data. The communication module 21 may be a wireless communication module or a wired communication module, or other forms of data transmission, which may be specifically selected according to actual needs, and the present application is not limited thereto.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. An LED dimming control circuit, comprising:

the rectification module is used for accessing commercial power and converting the commercial power into direct current;

2. The circuit of claim 1, wherein the resistive load block comprises:

3. The circuit of any of claims 1-2, wherein the dimming module comprises:

4. The circuit of any of claims 1-2, further comprising:

5. The circuit according to any one of claims 1-2, wherein the LED module comprises a plurality of LED light emitting elements with different color temperatures, and the LED control circuit is connected to the plurality of LED light emitting elements with different color temperatures to control the brightness and time ratio of each LED light emitting element to obtain different color temperatures, thereby achieving color matching of the circuit.

6. The circuit of any of claims 1-2, wherein the LED control circuit is a linear constant current control circuit.

7. An LED lamp comprising the LED dimming control circuit of any one of claims 1-6, further comprising:

8. The LED light fixture of claim 7 wherein the external controller includes a communication module configured to send the dimming command to the dimming module.