A potential-pwm regulating circuit and automobile lights using the regulating circuit

A - PWM, adjusting circuit technology, applied in vehicle components, optical signals, signal devices, etc., can solve the problems of reducing product performance life, damage, large circuit current, etc., to improve performance and life, improve reliability, and avoid backflow. Effect
CN104369688BActive Publication Date: 2016-09-07显亮(昆山)汽车配件有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
显亮(昆山)汽车配件有限公司
Publication Date
2016-09-07

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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.
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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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