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Control device and control method

The technology of a control device and control method, which is applied in the direction of instrument panel lighting equipment, etc., can solve the problems of backlight brightness changes, fluctuations, lack of automatic feedback adjustment and control, etc., and achieve the effect of stable brightness

Active Publication Date: 2021-06-18
HANGZHOU SANHUA RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, automotive backlights are basically switched on and off through triodes, and the lighting control is set by the factory. There is only a single switch state, and there is no automatic feedback adjustment and control. There may be certain fluctuations in the situation, which may cause the backlight to fail to work at the rated current all the time, resulting in changes in the brightness of the backlight, so improvements are needed to improve the above technical problems

Method used

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0021] The embodiment of the present invention discloses a control device for a vehicle backlight. The preferred embodiment of the present invention is described with the control device for an LED backlight of an automobile air conditioner. Of course, other control devices for backlights are also within the scope of the present invention. Inside, the control of the backlight in this embodiment includes the feedback adjustment of the backlight, so that the backlight works at a rate close to the rated current, so that the brightness of the backlight tends to be stable.

[0022] Such as figure 1 and figure 2 As shown, in Embodiment 1, the control device of the LED backlight includes an adjustment circuit 1, a voltage acquisition circuit 2 and a microcontroller 3, the adjustment circuit 1 includes a sampling resistor R4 and a first triode Q1, and the L...

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Abstract

A control device and a control method. The control device can control a vehicle backlight, and includes an adjustment circuit, a voltage acquisition circuit, and a microcontroller. The adjustment circuit includes a sampling resistor and a first triode, and the connection between the backlight and the first triode The collector is connected, the sampling resistor is connected to the emitter of the first triode, and the voltage acquisition circuit collects the voltage value of the second voltage signal corresponding to the sampling resistor and compares it with the first reference voltage preset by the microcontroller. The comparison result controls the output voltage value of the first voltage signal, so that the backlight operates at a current close to the rated current.

Description

【Technical field】 [0001] The present invention relates to the technical field of automotive electronic control, and more specifically relates to a control device and a control method capable of controlling a vehicle backlight. 【Background technique】 [0002] At present, automotive backlights are basically switched on and off through triodes, and the lighting control is set by the factory. There is only a single switch state, and there is no automatic feedback adjustment and control. There may be certain fluctuations in the situation, which may cause the backlight to fail to work at the rated current all the time, resulting in changes in the brightness of the backlight. Therefore, improvements are needed to improve the above technical problems. 【Content of invention】 [0003] The object of the present invention is to provide a control device and a control method, so that the backlight tends to operate at a rated current, thereby making the brightness of the backlight tend t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60Q3/16
CPCB60Q3/16
Inventor 不公告发明人
Owner HANGZHOU SANHUA RES INST CO LTD