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Potential-PWM regulating circuit and automotive lamp with same

A technology of PWM and regulating circuits, which is applied in the direction of vehicle components, optical signals, signal devices, etc., can solve the problems of reducing product performance, life, damage, and low current, so as to improve performance and life, improve reliability, and be less prone to damage Effect

Active Publication Date: 2015-02-25
显亮(昆山)汽车配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing automotive backlight adjustments are widely used to change the output voltage by changing the resistance value. In this way, the current in the circuit is relatively large, which is easy to cause damage, and when the number of vehicle backlight switches increases, the current will be too small and the lights cannot be turned on. , thereby reducing product performance life

Method used

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  • Potential-PWM regulating circuit and automotive lamp with same
  • Potential-PWM regulating circuit and automotive lamp with same
  • Potential-PWM regulating circuit and automotive lamp with same

Examples

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Embodiment 1

[0018] Such as figure 1 As shown, the potential-PWM adjustment circuit of this embodiment is composed of a potential adjustment unit, a single-chip microcomputer, a PWM amplification unit and a backlight enabling unit. The single-chip microcomputer receives the potential signal output by the potential adjustment unit and the control signal of the backlight enabling unit. When the backlight When the control signal of the enabling unit is at high level, the single-chip microcomputer calculates and outputs the PWM signal to the PWM amplifying unit according to the potential signal; when the control signal of the backlight enabling unit is at low level, the single-chip microcomputer stops outputting the PWM signal to the PWM amplifying unit.

[0019] In this embodiment, the single chip microcomputer adopts STM8S003F3P6, and its power supply voltage is 5V.

[0020] Such as figure 2 As shown, the potential adjustment unit is composed of a three-terminal potentiometer RP. The two f...

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PUM

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Abstract

The invention aims to provide a potential-PWM regulating circuit and an automotive lamp with the same and solve the defects that a resistance-type regulating circuit is prone to damage, and the operation of an automotive lamp is influenced by excessively large common current. The circuit comprises a potential regulating unit, a single chip processor and a PWM amplification unit; the single chip processor receives potential signals output by the potential regulating unit and calculates and outputs PWM signals to the PWM amplification unit according to the potential signals; the PWM amplification unit amplifies the PWM to improve the lamp body drive capability. According the circuit, the backlight voltage is controlled by the single chip processor effectively, a potentiometer inputs the potential signals with small current only, damage is avoided, the normal operation of the automotive lamp is not influenced, the performance of the product is improved, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of automobile electronics, and in particular relates to a potential-PWM adjustment circuit and an automobile lamp using the adjustment circuit. Background technique [0002] Existing automotive backlight adjustments are widely used to change the output voltage by changing the resistance value. In this way, the current in the circuit is relatively large, which is easy to cause damage, and when the number of vehicle backlight switches increases, the current will be too small and the lights cannot be turned on. , thus reducing the performance life of the product. Contents of the invention [0003] The object of the present invention is to provide a potential-PWM adjustment circuit and an automobile lamp using the adjustment circuit, so as to solve the disadvantages of the resistive adjustment circuit being easily damaged and the common current being too large which affects the operation of the lamp. [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60Q1/00
Inventor 陈勇
Owner 显亮(昆山)汽车配件有限公司
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