CN216673359U - A constant current dimming system for table lamps - Google Patents

Abstract

The utility model discloses a constant-current dimming system for a desk lamp, which relates to the field of desk lamp control circuits and comprises a main control unit, a touch input module, a key lamp panel display circuit, a constant-current control circuit, a lighting and extinguishing control circuit and a power supply circuit, wherein the touch input module is electrically connected with a signal output port of the main control unit, the constant-current control circuit and the lighting and extinguishing control circuit are electrically connected with the signal output port of the main control unit, the signal output ports of the constant-current control circuit and the lighting and extinguishing control circuit are electrically connected with a lamp strip, the key lamp panel display circuit is electrically connected with the signal output port of the main control unit, and the power supply circuit is used for supplying power to a dimming system. The utility model has the advantages that: according to the utility model, the PWM signal is converted into continuous linear variable current through the built-in constant current control circuit, the non-stroboscopic brightness adjustment of light is realized, and the eye protection grade of the desk lamp is improved.

Description

A constant current dimming system for table lamps

technical field

The utility model relates to the field of desk lamp control circuits, in particular to a constant current dimming system for desk lamps.

Background technique

Table lamps generally refer to electric lamps with bases that are placed on the table, but with the advancement of technology, the appearance and shape of table lamps are also constantly developing, and magnetic table lamps that can be attached to any position have gradually appeared. Delicate and easy to carry. The function of the desk lamp is mainly to illuminate, which is convenient for reading, learning, and work.

With the development of electricity, the circuit control of desk lamps mostly adopts touch brightness adjustable circuit. Its working principle is that by installing the sensing electrode sheet, when the human body touches the sensing electrode sheet, the touch signal is sent by pulsating direct current to generate a pulse signal and transmit it to the Touch input module, and then the touch input module sends the signal to the main control unit. According to the input of the human body touching the sensing electrode, the current of the light bar is adjusted through the internal circuit, so as to realize the stepless adjustment of the brightness of the desk lamp. Based on the above principles, we propose A constant current dimming system for desk lamps.

Utility model content

The main purpose of the present utility model is to provide a constant current dimming system for desk lamps, which can effectively accept input signals through a touch input module, and convert them into PWM signals through the main control unit and send them to a constant current control circuit, where the constant current controls The constant current chip, inductor and other components of the circuit convert the PWM signal into a continuous and linear changing current output to achieve the effect of frequency-free brightness adjustment of the light.

To achieve the above purpose, the technical scheme adopted by the present utility model is:

A constant current dimming system for a desk lamp, comprising a main control unit, a touch input module, a key light panel display circuit, a constant current control circuit, an on-off control circuit and a power supply circuit, the touch input module and the main control unit signal output port Electrically connected, the touch input module is used to convert the received control information into an electrical signal input value to the main control unit, the constant current control circuit and the on/off control circuit are both electrically connected to the signal output port of the main control unit , the signal output ports of the constant current control circuit and the on-off control circuit are both electrically connected to the light bar, and the constant current control circuit is used to accept the PWM signal output by the main control unit and convert it into a continuous linear variable current output control The brightness of the light bar, the on-off control circuit is used to receive the control signal output by the main control unit and control the light bar to turn on and off, the button light board display circuit is electrically connected with the signal output port of the main control unit, the button light board The display circuit is electrically connected with the key light board, the key light board display circuit is used for synchronizing the on-off changes of the key light board according to the operation change of the touch input module, and the power supply circuit is used for supplying power to the dimming system.

Preferably, the main control unit is integrated with an MCU main control chip and a program download circuit, the program download circuit is electrically connected with the MCU main control chip, and the program download circuit is used to burn the compiled logic program into Inside the MCU chip.

Preferably, the model of the MCU main control chip is YX23F01C.

Preferably, the model of the main chip of the constant current dimming circuit is XL3003E1.

Preferably, the model of the main chip of the power supply circuit is 78L05, and the power supply circuit is used to decompress and convert the input DC 12V voltage to DC 5V voltage output.

Compared with the prior art, the utility model has the following beneficial effects:

In the present invention, the constant current control circuit provided by the main control unit can effectively convert the PWM control signal sent by the main control unit into the PWM signal and send it to the constant current control circuit. Convert the PWM signal into a continuous linear changing current and output it to the light bar to realize the effect of frequency-free brightness adjustment of the light. At the same time, a button light board display circuit is provided to display the brightness level of the light bar, which can effectively remind the user. The current light brightness is convenient for the user to have a quantitative standard for the light brightness when adjusting the light brightness, which is convenient for the user to use and adjust.

Description of drawings

Fig. 1 is the circuit block diagram of the present utility model;

Fig. 2 is the circuit diagram of the MCU main control chip of the present invention;

Fig. 3 is the circuit diagram of the constant current control circuit of the present invention;

Fig. 4 is the circuit diagram of the on-off control circuit of the present utility model;

Fig. 5 is the circuit diagram of the key light panel display circuit of the present invention;

Fig. 6 is the circuit diagram of the program download circuit of the present utility model;

FIG. 7 is a circuit diagram of the power supply circuit of the present invention.

Detailed ways

In order to make the technical means, creative features, achievement goals and effects realized by the present invention easy to understand, the present invention will be further described below with reference to the specific embodiments.

As shown in Figure 1-7, a constant current dimming system for desk lamps includes a main control unit, a touch input module, a key light panel display circuit, a constant current control circuit, an on-off control circuit and a power supply circuit. The touch input module It is electrically connected with the signal output port of the main control unit. The touch input module is used to convert the received control information into electrical signal input value. Electrical connection, the signal output ports of the constant current control circuit and the on-off control circuit are all electrically connected to the light bar. The constant current control circuit is used to receive the PWM signal output by the main control unit and convert it into a continuous linear changing current output to control the light. The bar brightness, on-off control circuit is used to receive the control signal output from the main control unit and control the light bar to turn on and off. The key light board display circuit is used to synchronize the on-off changes of the key light board according to the operation change of the touch input module, which can effectively remind the user of the current light brightness, which is convenient for the user to adjust the light brightness when adjusting the light brightness. The brightness has a quantitative standard, which is convenient for users to use and adjust, and the power supply circuit is used to supply power to the dimming system.

The main control unit integrates the MCU main control chip and the program download circuit. The program download circuit is electrically connected to the MCU main control chip. The program download circuit is used to burn the prepared logic program into the MCU chip. The model of the MCU main control chip For YX23F01C, the MCU main control chip realizes all the functions of the product according to the programmed software logic, and at the same time can receive input commands from external touch button signals to control the operation of different functions.

The model of the main chip of the constant current dimming circuit is XL3003E1. The constant current control circuit can effectively convert the PWM control signal sent by the main control unit into a PWM signal and send it to the constant current control circuit. And other components convert the PWM signal into a continuous linear changing current and output it to the light bar to achieve the effect of frequency-free brightness adjustment of the light.

The main chip model of the power supply circuit is 78L05, and the power supply circuit is used to decompress and convert the input DC 12V voltage to DC5V voltage output.

To sum up, the advantages of the present utility model are as follows: the present utility model proposes a novel constant current dimming system for table lamps, through the built-in constant current control circuit, the PWM signal can be converted into a continuous linear changing current, and the light without Frequency brightness adjustment, improve the eye protection level of table lamps.

The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention The new model will also have various changes and improvements, which all fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. A constant current dimming system for a desk lamp, comprising a main control unit, a touch input module, a key light panel display circuit, a constant current control circuit, an on-off control circuit and a power supply circuit, it is characterized in that: the touch input module and The signal output port of the main control unit is electrically connected, and the touch input module is used to convert the received control information into an electrical signal input value. The signal output port is electrically connected, the signal output port of the constant current control circuit and the on-off control circuit are both electrically connected to the light bar, and the constant current control circuit is used to receive the PWM signal output by the main control unit and convert it into continuous The linear change current output controls the brightness of the light bar. The on-off control circuit is used to receive the control signal output by the main control unit and control the light bar to turn on and off. The button light board display circuit is electrically connected to the signal output port of the main control unit. , the button light board display circuit is electrically connected with the button light board, the button light board display circuit is used for synchronizing the on-off changes of the button light board according to the operation change of the touch input module, and the power supply circuit is used for adjusting The light system is powered. 2. The constant current dimming system for a desk lamp according to claim 1, wherein the main control unit is integrated with an MCU main control chip and a program download circuit, and the program download circuit is electrically connected to the MCU main control chip. The program download circuit is used to burn the prepared logic program into the MCU chip. 3 . The constant current dimming system for a desk lamp according to claim 2 , wherein the model of the MCU main control chip is YX23F01C. 4 . 4 . The constant current dimming system for a desk lamp according to claim 3 , wherein the model of the main chip of the constant current dimming circuit is XL3003E1. 5 . 5 . The constant current dimming system for a desk lamp according to claim 4 , wherein the main chip of the power supply circuit is 78L05, and the power supply circuit is used to decompress and convert the input DC 12V voltage to DC. 6 . 5V voltage output.

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