TWI669984B - LED lamp bright control structure - Google Patents

Abstract

An LED lamp brightness control structure includes: a sensing switch and at least one LED control device; the current signal is converted into the voltage signal by the transimpedance amplifying unit; and the voltage signal is converted with the pivot circuit To the square wave signal, so that the sensing switch can be connected to a plurality of the LED control devices with a single wire, and the function of controlling multiple LED lights can be achieved at the same time, because the sensing switch will be set independently for the desired In the sensed position, it is only necessary to wire the wire between the sensing switch and the LED control device, and the single wire allows multiple LED control devices connected in parallel to be more easily wired, and the wires can be greatly reduced. Therefore, it has practical functions such as easy wiring between the sensing switch and the LED control device and reducing the installation cost.

Description

LED light control structure

The invention relates to an LED control device, in particular to a bright control structure for an LED lamp that has both easy wiring and reduced installation costs.

As shown in FIG. 3, a conventional LED lamp brightness control structure includes a sensing switch 301, a plurality of LED drivers 302, and a plurality of LED lamps 303. The sensing switch 301 is provided with two wires (304) ( 305) is connected to the LED driver 302, and the LED lamp 303 is directly fixed to the LED driver 302, that is, the LED driver 302 and the LED lamp 303 have an integral structure, and the sensor uses a relay as an ON / OFF action part, Thereby, when there is a dynamic change in the sensing range, a voltage signal is transmitted to the LED driver 302 through the wires (303) (304), so that the LED driver 302 controls the timing and brightness of the LED lamp 303, It further achieves the purpose of controlling the LED lamp 303, but it is not difficult to find out that there are still some shortcomings when looking at the above-mentioned conventional structure. The main reason is as follows: In using the sensing switch 301, a plurality of the LEDs must be connected at the same time. The driver 302 and the LED lamp 303, and the installation position of the sensing switch 301 is quite far from the above-mentioned required lighting position. Therefore, there is a need for wiring between the two wires (304) (305). The greater the number, the wire (304) (305 The difficulty in wiring will greatly increase, and the use of the wire will be greatly increased, making the conventional voltage-based sensing method have the disadvantages of difficulty in wiring and high installation costs, and the voltage-based sensing. In this way, the sensing switch 301 will be limited by the wattage of the LED driver 302. Too many connections of the LED lamp 303 will cause a significant voltage drop, so that the number of simultaneous connections of the sensing switch 301 to the LED lamp 303 is affected. Restricted and cannot be flexibly configured and used.

In view of this, the present inventors have engaged in the manufacturing, development and design of related products for many years. After careful design and careful evaluation of the above-mentioned goals, they finally have a practical invention.

The technical problem to be solved by the present invention is to provide an LED lamp brightness control structure in response to the above-mentioned shortcomings existing in the prior art.

A sensing switch is used for sensing a change in the environment to generate a current signal, and the current signal is output through a wire. At least one LED control device includes a current rectification unit, a current limiting unit, and a transimpedance amplifier. Unit, a voltage dividing circuit unit, and a pivot circuit unit, the current rectification unit is connected to the wire of the sensing switch by an anode of a diode, and the current signal is rectified by the diode. The current unit includes a first resistor and a second resistor connected in series with each other. The input end of the first resistor is connected to the cathode of the diode, and the current limiting unit forms a current limit of the current signal. The unit includes an optical output coupler, a light receiving coupler, and a voltage amplifier. One end of the optical output coupler is connected to the output end of the second resistor, and the other end of the optical output coupler is grounded to allow the current signal. An optical signal is generated through the optical output coupler, and the emitter of the light receiving coupler is connected to the non-inverting terminal of the voltage amplifier, and the collector of the light receiving coupler is connected to the voltage amplifier. The inverter's inverting terminal receives a light signal from the base of the light receiving coupler to generate a voltage signal corresponding to the current signal, and the output terminal of the voltage amplifier is connected to the voltage dividing circuit unit to allow the voltage The signal is amplified by the signal of the voltage amplifier and then flows through the voltage dividing circuit unit for voltage division. The non-inverting end of the pivot circuit unit is connected to the voltage dividing circuit unit, and the pivot circuit unit receives the Voltage The signal generates a square wave signal with lights on and off (ON / OFF), and the square wave signal is output by the output terminal of the pivot circuit unit to achieve the control purpose.

The transimpedance amplifier further includes a third resistor, a filter, a protector, a fourth resistor, and a capacitor. The optical output coupler is connected to the second resistor through the third resistor, and the filter One end in parallel with the protector is connected between the third resistor and the second resistor, and the other end in parallel with each other is connected with the ground end of the optical output coupler, and the fourth resistor is connected to the capacitor. One end connected in parallel is connected between the light receiving coupler and the inverting end of the voltage amplifier, and the other end connected in parallel is connected between the light receiving coupler output end and the voltage dividing circuit unit input end. .

The voltage dividing circuit unit includes a fifth resistor and a sixth resistor, the fifth resistor and the sixth resistor are connected in series with each other, and an input terminal of the fifth resistor is connected to an output terminal of the light receiving coupler, and The fifth resistor and the sixth resistor are connected to the non-inverting terminal of the pivot circuit unit.

Wherein, the LED control device further includes a microcontroller and a function setting unit, the microcontroller is connected to the light receiving coupler output terminal, and the function setting unit is connected to the sixth resistance output terminal and the microcontroller And the sixth resistor, the microcontroller, and the function setting unit form a common ground, and the function setting unit can be manually set, thereby controlling the microcontroller to perform the setting after receiving the square wave signal Lighting mode.

The LED control device further includes a reference power supply unit. The reference power supply unit is formed with a first terminal, a second terminal, and a third terminal. The first terminal is used for inputting a DC voltage. The two terminals are used for grounding, and the third terminal of the reference power supply unit is connected to the voltage amplifier, the pivot circuit unit, and the microcontroller, and is output by the third terminal. Provides low-voltage control DC power.

The reference power unit is a low dropout regulator (LDO).

The LED control device further includes an LED drive control unit. One end of the LED drive control unit is connected to the output of the microcontroller, and the other end of the LED drive control unit is connected to an LED lamp. The LED lights are controlled for lighting and brightness adjustment, and the brightness control of the LED drive control unit can form a stepless gradual or dim lighting change.

The LED control device further includes a rectifier unit and a power supply unit. The rectifier unit is connected to an external power source and a rectified output is connected to the power supply unit and the LED drive control unit. The rectifier unit provides power to the LED lamp. When used, the power supply unit is connected to the reference power supply unit, and after the voltage is reduced through the power supply unit, power is supplied to the reference power supply unit.

The rectifier unit includes an inductor and a full-wave rectifier. The inductor is connected to an external power source and the full-wave rectifier. The rectifier unit is connected to the power supply unit and the LED drive control unit through the full-wave rectifier.

The power supply unit includes a transistor, a seventh resistor, an eighth resistor, a filter capacitor, and a protection diode. A collector of the transistor is connected to the seventh resistor and connected to the seventh resistor. The rectifying unit, the base of the transistor is connected to the protection diode and grounded, and the emitter of the transistor is connected to the filter capacitor and grounded, and the emitter of the transistor is also connected to the eighth resistor, The first terminal of the reference power supply unit is connected by the eighth resistor.

The main purpose of the present invention is to convert the current signal into the voltage signal through the transimpedance amplifying unit, and cooperate with the pivot circuit to convert the voltage signal into the square wave signal, so that the sensing switch can be a single The wire is connected to a plurality of the LED control devices, and the function of controlling multiple LED lights can be achieved at the same time. Since the LED control device is an integrated electronic component, the sensing switch will be independently set for sensing. Position, so only the wire needs to be wired between the sensing switch and the LED control device, and the single wire can make it easier for multiple parallel LED control devices to be wired, and it can greatly reduce the use of wires Therefore, it has practical functions such as easy wiring between the sensing switch and the LED control device and reducing the installation cost.

Other objects, advantages, and novel features of the present invention will become more apparent from the following detailed description and the accompanying drawings.

[This creation]

100‧‧‧Sense switch

200‧‧‧LED control device

201‧‧‧Current Rectifier Unit

202‧‧‧current limiting unit

203‧‧‧ Transimpedance Amplifier Unit

204‧‧‧Divided voltage circuit unit

205‧‧‧ pivotal circuit unit

206‧‧‧Microcontroller

207‧‧‧Function Setting Unit

208‧‧‧LED drive control unit

209‧‧‧Reference power unit

210‧‧‧LED Light

211‧‧‧Rectifier unit

212‧‧‧Power supply unit

A1‧‧‧Current signal

C1‧‧‧Filter

C2‧‧‧Capacitor

C3‧‧‧filter capacitor

D1‧‧‧diode

D2‧‧‧ Protector

D3‧‧‧full wave rectifier

D4‧‧‧Protection diode

F1‧‧‧ Square wave signal

S1‧‧‧First endpoint

S2‧‧‧Second endpoint

S3‧‧‧ Third endpoint

L1‧‧‧conductor

L2‧‧‧Inductor

OC1‧‧‧Optical Output Coupler

OC2‧‧‧Optical Receiver Coupler

Q1‧‧‧Voltage Amplifier

Q2‧‧‧Transistor

R1‧‧‧first resistor

R2‧‧‧Second resistor

R3‧‧‧Third resistor

R4‧‧‧Fourth resistor

R5‧‧‧Fifth resistor

R6‧‧‧sixth resistor

R7‧‧‧seventh resistor

R8‧‧‧eighth resistor

V1‧‧‧Voltage signal

[Learning]

301‧‧‧Sense switch

302‧‧‧LED driver

303‧‧‧LED Light

(304) (305) ‧‧‧Wire

Figure 1 is a block diagram of the present invention.

Fig. 2 is a circuit diagram of the present invention.

Figure 3 is a block diagram of the conventional art.

In order for your reviewers to have a better understanding and understanding of the purpose, features and effects of the present invention, the following are detailed in conjunction with the [Simplified Description of the Drawings] as follows: First, please look at the views shown in Figures 1 and 2 An LED light control structure includes: a sensing switch 100 and at least one LED control device 200; a sensing switch 100 is used for sensing a change in the environment to generate a current signal A1, and the current signal A1 passes through a wire L1 forms an output. At least one LED control device 200 includes a current rectifying unit 201, a current limiting unit 202, a transimpedance amplifier unit 203, a voltage dividing circuit unit 204, and a pivot circuit unit. 205, the current rectifying unit 201 is connected to the lead L1 of the sensing switch 100 with an anode of a diode D1, and rectifies the current signal A1 with the diode D1. The current limiting unit 202 includes A first resistor R1 and a second resistor R2. The input terminal of the first resistor R1 is connected to the cathode of the diode D1, and the current limiting unit 202 forms a current limit of the current signal A1, so as to control access to the converter. The resistance amplifying unit 203 is a small current. The transimpedance amplifying unit 203 includes an optical output coupler OC1, a light receiving coupler OC2, a voltage amplifier Q1, a third resistor R3, a filter C1, a protector D2, A fourth resistor R4 and a capacitor C2, one end of the optical output coupler OC1 is connected to the output terminal of the second resistor R2, and the optical output coupler OC1 is connected to the second resistor R2 through the third resistor R3 To effectively form the current Current, and the other end of the optical output coupler OC1 is grounded, so that the current signal A1 generates an optical signal through the optical output coupler OC1, and the filter C1 and the protector D2 are connected to the first end in parallel with each other. Between the third resistor R3 and the second resistor R2, and the other end connected in parallel to each other is connected to the grounded end of the optical output coupler OC1, the power signal A1 is filtered through the filter C1, and the protector can be protected by the protector. D2 forms a protection function for excessive current. The emitter of the light receiving coupler OC2 is connected to the non-inverting terminal of the voltage amplifier Q1, and the collector of the light receiving coupler OC2 is connected to the inverting terminal of the voltage amplifier Q1. The base of the optical receiving coupler OC2 receives an optical signal and generates a voltage signal V1 corresponding to the current signal A1. The output terminal of the voltage amplifier Q1 is connected to the voltage dividing circuit unit 204. The fourth resistor R4 is connected to The capacitor C2 is connected between the light receiving coupler OC2 and the inverting terminal of the voltage amplifier Q1 with one end in parallel and the other end connected in parallel with the light receiving coupler OC2. Between the output end and the input end of the voltage dividing circuit unit 204, the voltage dividing circuit unit 204 includes a fifth resistor R5 and a sixth resistor R6, the fifth resistor R5 and the sixth resistor R6 are connected in series with each other, and The input terminal of the fifth resistor R5 is connected to the output terminal of the light receiving coupler OC2, and the non-inverting terminal of the pivot circuit unit 205 is connected between the fifth resistor R5 and the sixth resistor R6, so that the voltage signal V1 The signal of the voltage amplifier Q1 is amplified and then flows through the voltage dividing circuit unit 204 for voltage division, and then cuts off a large portion of the voltage signal V1. The non-inverting terminal of the pivot circuit unit 205 is connected to the The voltage dividing circuit unit 204, and the pivotal circuit unit 205 receives the voltage signal V1 and generates a square wave signal F1 with lights on and off (ON / OFF), and is output by the pivotal circuit unit 205 The terminal outputs the square wave signal F1 to achieve the control purpose. The transimpedance amplifying unit 203 converts the current signal A1 into the voltage signal V1, and cooperates with the pivot circuit 205 to convert the voltage signal V1 into the square wave signal. F1, so that the sensing switch 100 can use a single wire L1 At least one LED connected to the control means 200, serve to sense switch 100 having the practical function of easy wiring between the LED control apparatus 200.

As shown in Figures 1 and 2, the LED control device 200 further includes a microcontroller 206, a function setting unit 207, an LED drive control unit 208, and a reference power supply unit 209. The microcontroller 206 The light receiving coupler OC2 output terminal is connected, and the function setting unit 207 is connected between the sixth resistor R6 output terminal and the microcontroller 206, and the sixth resistor R6, the microcontroller 206 and the function setting The unit 207 is formed with a common ground, and the function setting unit 207 can be manually set, and its setting items include functions such as lighting time, lighting duration, or lighting illuminance adjustment, thereby controlling the microcontroller 206 to receive the After the square wave signal F1, the set lighting mode is performed. One end of the LED drive control unit 208 is connected to the output terminal of the microcontroller 206, and the other end of the LED drive control unit 208 is connected to an LED light. 210. The LED driving control unit 208 is used to drive the LED lamp 210 to control lighting and adjust brightness, and the adjustment of the brightness control of the LED driving control unit 208 can form a stepless fade-in or fade-out lighting change. The reference power supply unit 209 is a low dropout regulator (LDO). The reference power supply unit 209 is formed with a first terminal S1, a second terminal S2, and a third terminal S3. The terminal S1 is used for inputting a DC voltage, and the second terminal S2 is used for grounding. The third terminal S3 of the reference power supply unit 209 is connected to the voltage amplifier Q1, the pivot circuit unit 205, and the microcontroller. 206, and both the voltage amplifier Q1 and the pivot circuit unit 205 are formed with one end grounded, and a low-voltage control DC power is provided by the third terminal S3 output.

As shown in Figures 1 and 2, the LED control device 200 further includes a rectifier unit 211 and a power supply unit 212. The rectifier unit 211 is connected to an external power source and the rectified output is connected to the power supply unit 212 and the power supply unit 212. The LED driving control unit 208 provides power to the LED lamp 210 through the rectifying unit 211, and the power supply unit 212 is connected to the reference power unit 209, and after the voltage is reduced through the power supply unit 212, the reference power unit is supplied with power. 209. The rectifier unit 211 includes an inductor L2 and a full-wave rectifier D3. The inductor L2 is connected to an external power source and the full-wave rectifier D3. The rectifier unit 211 is connected to the power supply unit 212 and the power supply unit 212 through the full-wave rectifier D3. The LED drives the control unit 208 to form a power supply. The power supply unit 212 includes a transistor Q2, a seventh resistor R7, an eighth resistor R8, a filter capacitor C3, and a protection diode D4. The collector of the crystal Q2 is connected to the seventh resistor R7, and the rectifier unit 211 is connected to the seventh resistor R7, and the base of the transistor Q2 is connected to the protection diode D4 and forms a ground. The radio of transistor Q2 is connected to the filter capacitor C3 and a ground, the transistor Q2 and shoot at the same time connected to the electrode of the eighth resistor R8, by which The eighth resistor R8 is connected to the first terminal S1 of the reference power supply unit 209.

For the actual use effect, please observe from Figures 1 and 2. The rectifier unit 211 uses the inductor L2 to input external power (AC power), and then transforms the voltage through the inductor L2 to the full-wave rectifier. D3, and then supply the rectified relatively high voltage power to the power supply unit 212 and the LED drive control unit 208, and the relatively high voltage power flows through the seventh resistor R7, the transistor Q2, and the eighth of the power supply unit 212. The resistor R8 will step down to form relatively low voltage power, and let the relatively low voltage power be input to the first terminal S1 of the reference power supply unit 209. After the voltage of the reference power supply unit 209 is reduced again, the third terminal S3 provides the control power of the voltage amplifier Q1, the pivot circuit unit 205 and the microcontroller 206, and the relatively high voltage power flowing to the LED drive control unit 208 can be used to light the LED lamp 210, and then To further explain the lighting and shading control of the LED lamp 210, when the sensing switch 100 is connected to an external power source and detects a dynamic change within the sensing range, the sensing switch 100 will generate an ON / OFF mode. Current signal A1 And the current signal A1 can flow into the current rectifying unit 201 of at least one LED control device 200 through a single wire L1 at the same time, and then rectify through the diode D1 of the current rectifying unit 201, and then use the current limiting unit 202. The first resistor R1 and the second resistor R2 limit the current and reduce the current value of the current signal A1. After the current signal A1 is input to the transimpedance amplifying unit 203, a current limit is formed again by the third resistor R3, so that the The current signal A1 can drive the optical output coupler OC1 to generate an optical signal, and the optical signal can increase as the current of the current signal A1 rises. At the same time, the optical receiving coupler OC2 receives the optical signal and generates a corresponding voltage signal V1. The voltage signal V1 can also increase as the optical signal rises, and the voltage signal V1 is input to the inverting terminal of the voltage amplifier Q1, and the output terminal of the voltage amplifier Q1 can be used to form an amplification of the voltage signal V1 and input The voltage dividing circuit unit 204 passes through the fifth The divided voltage of the resistor R5 and the sixth resistor R6, thereby filtering the excessively large voltage value that can be read by the Mitter circuit unit 205, and the divided voltage signal V1 is transmitted by the fifth resistor R5 and the sixth resistor R6. The non-inverting terminal of the Schmitt circuit unit 205 is inputted between them. The voltage signal V1 is interpreted by the Schmitt circuit unit 205 to generate a corresponding square wave signal F1, and the Schmitt circuit unit 205 can be further filtered. Noise, the square wave signal F1 can be input into the microcontroller 206, and in accordance with the user-defined setting of the function setting unit 207, the microcontroller 206 controls the LED drive control unit 208 to make the LED The lamp 210 has a function of automatically turning on and adjusting light according to the environment. By the structure of the specific embodiment described above, the following benefits can be obtained: the current signal A1 is converted into the voltage signal V1 by the transimpedance amplifying unit 203, And cooperate with the pivot circuit 205 to convert the voltage signal V1 into the square wave signal F1, so that the sensing switch 100 can connect a plurality of the LED control devices 200 with a single wire L1, and can control multiple of the LEDs simultaneously. LED lights 21 0 function. Since the LED control device 200 is an integrated electronic component, the sensing switch 100 is independently set at a position to be sensed. Therefore, the sensing switch 100 and the LED control device 200 are It is only necessary to wire the wire L1, and the single wire L1 makes it easier for the plurality of LED control devices 200 connected in parallel to wire, and it can also greatly reduce the amount of wires used, so that the sensor switch 100 and the Practical functions for easy wiring between the LED control devices 200 and reduction in installation costs.

To sum up, the present invention has indeed achieved a breakthrough structural design, with improved content of the invention, and at the same time, it can achieve industrial applicability and progress, and the present invention is not seen in any publications, and it is also novel. In accordance with the relevant provisions of the Patent Law, I filed an application for an invention patent in accordance with the law.

The above is only one preferred embodiment of the present invention. The scope of implementation of the present invention is limited; that is, any equivalent changes and modifications made in accordance with the scope of patent application of the present invention shall still fall within the scope of the patent of the present invention.

Claims (10)

An LED light brightness control structure includes: a sensing switch for sensing a change in environment to generate a current signal, and the current signal forms an output through a wire; and at least one LED control device, the LED The control device includes a current rectifying unit, a current limiting unit, a transimpedance amplifying unit, a voltage dividing circuit unit and a pivot circuit unit. The current rectifying unit is connected to the sensing switch by an anode of a diode. Conducting wire and rectifying the current signal with the diode, the current limiting unit includes a first resistor and a second resistor connected in series with each other, the input end of the first resistor is connected to the cathode of the diode, and The current limit of the current signal is formed by the current limiting unit. The transimpedance amplifying unit includes an optical output coupler, a light receiving coupler and a voltage amplifier. One end of the optical output coupler and the output end of the second resistor. Connected, and the other end of the optical output coupler is grounded, so that the current signal generates an optical signal through the optical output coupler, and the emitter of the optical receiving coupler is connected to the voltage amplifier The non-inverting terminal of the receiver, and the collector of the light receiving coupler is connected to the inverting terminal of the voltage amplifier, and the base signal of the light receiving coupler receives the optical signal to generate a voltage signal corresponding to the current signal, and the The output end of the voltage amplifier is connected to the voltage dividing circuit unit, so that the voltage signal is amplified by the signal of the voltage amplifier signal and then flows through the voltage dividing circuit unit for voltage division. The non-inverting end of the pivot circuit unit The voltage dividing circuit unit is connected, and the pivotal circuit unit receives the voltage signal to generate a square wave signal with lights on and off (ON / OFF), and the output terminal of the pivotal circuit unit outputs the The square wave signal is used to achieve the control purpose. The current signal is converted into the voltage signal by the transimpedance amplifying unit, and the voltage signal is converted into the square wave signal with the pivot circuit, so that the sensing switch can A single wire is connected to at least one of the LED control devices so as to have a practical function of easy wiring between the sensing switch and the LED control device. According to the brightness control structure of the LED lamp according to item 1 of the patent application scope, wherein the transimpedance amplifier further includes a third resistor, a filter, a protector, a fourth resistor and a capacitor, and the optical output coupler It is connected to the second resistor through the third resistor, and one end of the filter and the protector is connected between the third resistor and the second resistor in parallel, and the other end of the filter and the protector are connected to the parallel. One end of the optical output coupler is grounded, and the fourth resistor and the capacitor are connected in parallel to each other between the light receiving coupler and the inverting end of the voltage amplifier, and the other end in parallel is connected to the light. Between the output end of the receiving coupler and the input end of the voltage dividing circuit unit. According to the brightness control structure of the LED lamp according to item 2 of the patent application scope, wherein the voltage dividing circuit unit includes a fifth resistor and a sixth resistor, the fifth resistor and the sixth resistor are connected in series with each other, and the first resistor An input terminal of the five resistors is connected to an output terminal of the light receiving coupler, and a non-inverting terminal of the pivot circuit unit is connected between the fifth resistor and the sixth resistor. According to the LED lamp brightness control structure described in item 3 of the scope of the patent application, wherein the LED control device further includes a microcontroller and a function setting unit, the microcontroller is connected to the light receiving coupler output terminal, and the function The setting unit is connected between the sixth resistance output terminal and the microcontroller, and the sixth resistor, the microcontroller, and the function setting unit form a common ground, and the function setting unit can be manually set, thereby Control the microcontroller to perform the set lighting mode after receiving the square wave signal. According to the brightness control structure of the LED lamp according to item 4 of the scope of the patent application, wherein the LED control device further includes a reference power unit, the reference power unit is formed with a first terminal, a second terminal and a third terminal. Point, the first terminal is used to input a DC voltage, and the second terminal is used to ground, and the third terminal of the reference power supply unit is connected to the voltage amplifier, the pivot circuit unit, and the microcontroller, A low-voltage control DC power source is provided by the third terminal output. According to the LED lamp brightness control structure described in item 5 of the scope of the patent application, the reference power supply unit is a low dropout regulator (LDO). According to the LED lamp brightness control structure described in item 5 of the scope of patent application, wherein the LED control device further includes an LED drive control unit, one end of the LED drive control unit is connected to the output end of the microcontroller, and the LED drive control An LED light is connected to the other end of the unit, and the LED light is controlled by the LED drive control unit to light and adjust the brightness control, and the adjustment of the brightness control of the LED drive control unit can form a stepless fade-in or fade-out light. Variety. According to the brightness control structure of the LED lamp according to item 7 of the scope of the patent application, wherein the LED control device further includes a rectifier unit and a power supply unit, the rectifier unit is connected to an external power source and a rectified output is connected to the power supply unit and the The LED drive control unit supplies power to the LED lamp through the rectification unit, and the power supply unit is connected to the reference power unit, and after the voltage is reduced through the power supply unit, the power is supplied to the reference power unit. According to the brightness control structure for an LED lamp according to item 8 of the scope of the patent application, the rectifier unit includes an inductor and a full-wave rectifier, the inductor is connected to an external power source and the full-wave rectifier, and the rectifier unit passes through the full-wave rectifier. The wave rectifier connects the power supply unit and the LED drive control unit. According to the brightness control structure of the LED lamp according to item 8 of the scope of the patent application, wherein the power supply unit includes a transistor, a seventh resistor, an eighth resistor, a filter capacitor and a protection diode, the transistor The collector of the transistor is connected to the seventh resistor, and the rectifier unit is connected to the seventh resistor. The base of the transistor is connected to the protection diode and grounded, and the emitter of the transistor is connected to the filter capacitor and formed. The emitter of the transistor is connected to the eighth resistor at the same time, and the eighth resistor is connected to the first terminal of the reference power supply unit.