Near light and far light control circuit of automotive headlamp

A technology of automobile headlights and control circuits, which is applied in the electronic field and can solve problems such as complex structure of lamps and lanterns

Inactive Publication Date: 2010-05-12
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional car headlights use one bulb for the middle and far beams, so the struc

Method used

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  • Near light and far light control circuit of automotive headlamp
  • Near light and far light control circuit of automotive headlamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] like figure 1 As shown, the far and near light conversion control circuit of the car headlights includes a single-chip microcomputer EM78P153, a three-terminal voltage regulator circuit, and a full-bridge power drive circuit.

[0013] One end of the low-beam limit contact switch S1 is connected to the P62 pin of the single-chip microcomputer EM78P153, one end of the high-beam limit contact switch S2 is connected to the P63 pin of the single-chip microcomputer EM78P153, and the two contacts of the far-low light conversion switch S3 are respectively connected to the single-chip microcomputer EM78P153 P64 pin and P65 pin are connected, where P64 pin is the low beam signal end, P65 pin is the high beam signal end, the other end of the low beam limit contact switch S1, the other end of the high beam limit contact switch S2, far and near The common end of the optical switch S3 and the GND pin of the single-chip microcomputer EM78P153 are connected with the negative pole of th...

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PUM

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Abstract

The invention relates to a near light and far light control circuit of an automotive headlamp. At present, the cost for realizing near light and far light control of the automotive headlamp is higher. The control circuit comprises a singlechip EM78P153, a three-terminal voltage stabilizing circuit and a full-bridge power driving circuit, wherein, one end of a near light limit contact switch S1, one end of a far light limit contact switch S2 and two contacts of a near light and far light change-over switch S3 are respectively connected with the singlechip; the three-terminal voltage stabilizing circuit comprises a three-terminal voltage stabilizer and two filter capacitors; the full-bridge power driving circuit comprises two PNP-type triodes, two NPN-type triodes, eight resistors and a filter capacitor. A DC motor in the invention is electrified to work at the moment of conversion of the near light and the far light of the automotive headlamp to realize rapidly extend and retract so as to achieve the purpose that the far light and the near light respectively illuminate, thus realizing that the far light and the near light can share one light source and one electronic ballast, and saving the cost of the automotive headlamp. The control circuit of the invention has low power consumption and high reliability.

Description

technical field [0001] The invention relates to a far and near light conversion control circuit of an automobile headlight, which is mainly used for an automobile far and near light integrated lamp and belongs to the field of electronic technology. Background technique [0002] The headlights of a car are an important part to ensure the safe driving of the car at night. When the car is driving on the highway at night, the distance from the headlights is required to be far enough, and when the car is driving on the city streets at night, the headlights are required to shine The distance should not be too far, so as not to affect other vehicles. In the traditional automobile headlights, a light bulb is used for the far and near light respectively, so the structure of the light fixture is more complicated, and it is especially not suitable for the new type automobile xenon headlights. [0003] Automobile xenon lamp is a new generation of high-efficiency energy-saving green lig...

Claims

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Application Information

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IPC IPC(8): B60Q1/14
Inventor 高明煜姚建斌
Owner HANGZHOU DIANZI UNIV
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