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Automobile signal lamp switch circuit

A switching circuit and signal light technology, applied in the field of automobile signal light switch circuit and automobile turn signal light switch circuit, can solve problems such as inability to realize, and achieve the effects of preventing brightness inconsistency, reducing structural design difficulty, and low power consumption

Pending Publication Date: 2017-05-31
HASCO VISION TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of a single-channel output of the platform, it is impossible to realize the function of shutting down the entire circuit function after one LED fails, so it cannot meet the requirements of regulations (GB17509-2008)

Method used

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  • Automobile signal lamp switch circuit

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Under normal conditions:

[0053] (1) When the power supply V CC When supplying power, for example, when the output voltage of VCC is 15V, after this voltage is divided by R7=15k and R9=5.1k, the G pole voltage of N-MOSFET tubes Q2 and Q3 is 3.8V, which is in a high level state, N - MOSFET tubes Q2 and Q3 are in a conduction state.

[0054] (2) After the N-MOSFET tubes Q2 and Q3 are turned on, the current flows through the large resistor R1=10k, then flows through the light-emitting diodes LED1, LED3, LED5, LED7, and LED9, and then passes through the N-MOSFET tube Q2, diodes D1 and D3 Finally, return to the ground terminal. At this time, due to the conduction characteristics of the diode, a voltage of 1.4V will be established at the S poles of the N-MOSFETs Q2 and Q3.

[0055] (3) Since the S pole voltage of the N-MOSFET tubes Q2 and Q3 is 1.4V, that is, the B pole voltage of the triode TR1 and TR2 is at a high level, the triode TR1 and TR2 are turned on, so that the ...

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Abstract

The invention discloses an automobile signal lamp switch circuit which comprises a power supply module, a main circuit, a parallelly-connected circuit and a switch circuit body. The main circuit is sequentially serially connected with a first switch tube, the first group of light emitting diodes, a second switch tube and the first group of diodes and connected with the ground, two ends of a first resistor are parallelly connected with an input end and an output end of the first switch tube, the parallelly-connected circuit is sequentially connected with the second group of light emitting diodes, a third switch tube and the second group of diodes from an output end of the first switch tube and connected with the ground, and the switch circuit body controls connection and disconnection of the first switch tube, the second switch tube and the third switch tube. The switch circuit has the advantages that the circuit is applicable to most platform parts, current of two LEDs (light emitting diodes) can be automatically balanced by the circuit, brightness inconsistency of the LEDs is prevented, the circuit is low in power consumption, structural design difficulty is reduced, and the whole LED is completely turned off when one LED is damaged under split-series circuits.

Description

[0001] Technical field: [0002] The invention relates to the field of automotive signal lamp switch circuits, more specifically, to the technical field of automotive turn signal lamp switch circuits. [0003] Background technique: [0004] At present, in the design of automotive circuits, more and more platform modules are used for driving. The platform module is a standard module that can adapt to drive most LED current ranges, LED models and LED quantities, without having to reinstall Development and design save a lot of cost and time. However, there is a limit on the maximum output voltage in the design of the platform component module, so that the design of multiple LEDs in series cannot be fully realized, and is often limited by the number of series. In this case, in order to meet the styling requirements, the original LEDs need to be designed in series. However, in the case of single-channel output of platform parts, the function of shutting down the entire circuit fun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60Q1/34H05B33/08H05B44/00
CPCB60Q1/34B60Q2400/20H05B45/00Y02B20/30
Inventor 陆骏李佳颖
Owner HASCO VISION TECHNOLOGY CO LTD
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