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Protection circuit and method for preventing continuous black screen of LCD screen

An LCD screen, black screen protection technology, applied in static indicators, instruments, etc., can solve the problem of LCD screen black screen and other problems, achieve the effect of good EMC performance, low device cost, simple and effective circuit

Active Publication Date: 2021-10-01
HUIZHOU DESAY SV AUTOMOTIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the LCD screen is prone to always black screen phenomenon when it is disturbed by strong static electricity, the present invention provides a protection circuit and method for preventing the LCD screen from continuing to be black screen

Method used

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  • Protection circuit and method for preventing continuous black screen of LCD screen
  • Protection circuit and method for preventing continuous black screen of LCD screen

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Embodiment

[0029] figure 1 A circuit structure diagram of the protection circuit for preventing the LCD screen from continuing to be black in this embodiment is shown.

[0030] Such as figure 1 As shown, the present embodiment provides a protection circuit for preventing the LCD screen from continuing to be black. Specifically, the protection circuit includes an LCD interface module 10, a power switch module 20, and an MCU control module 30, wherein the LCD interface module 10 is used for LCD The screen provides basic anti-static interference function; the function of the LCD power switch module 20 is to control the power supply of the power supply terminal VCC of the LCD screen, and to provide a fast discharge branch circuit for the LCD screen when the power supply of the LCD screen is turned off; and the MCU control module 30 The function is to communicate with the LCD screen, control the output of the LCD screen, and provide control signals for the power switch module 20 according to...

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Abstract

The invention relates to the technical field of LCD screen static prevention, in particular to a protection circuit and method for preventing continuous black screen of an LCD screen. The circuit comprises an LCD interface module, a power switch module and an MCU control module. The input end and the output end of the power switch module are respectively connected with the power supply and the power end of the LCD screen, and the control end of the power switch module is connected with the enabling end of the MCU control module; the enabling end of the MCU control module is also connected with the power supply end of the LCD screen; the MCU control module is provided with two signal ends, the two signal ends are connected with two communication ports of the LCD screen respectively, instruction signals are continuously sent to the LCD screen, and response signals of the LCD screen are monitored; and the MCU control module controls the power switch module to turn on the power supply to the LCD screen, and when the response signal is terminated or abnormal, the power switch module is turned off, and the LCD screen is restarted after being discharged through the enabling end. According to the invention, the problem that the LCD screen is liable to be interfered by static electricity to cause continuous black screen can be effectively solved, the reliability of the LCD screen in use is improved, and the market competitiveness of the product, especially a vehicle-mounted LCD screen, is improved.

Description

technical field [0001] The invention relates to the technical field of LCD screen anti-static, in particular to a protective circuit and method for preventing the LCD screen from continuing to be black. Background technique [0002] Liquid crystal display, referred to as LCD screen (Liquid Crystal Display) in English, is a kind of flat-panel display, which is used for the screen display of TVs and computers. The advantages of this display are low power consumption, small size, and low radiation , so it has been widely used. As the thickness of electronic equipment decreases, it is easy to increase the risk of soft failure of the LCD screen due to electrostatic interference, and the black screen phenomenon caused by soft failure greatly affects the user experience. [0003] At present, the traditional LCD screen anti-static solution can resist the electrostatic interference of plus or minus 8KV, but when the LCD screen is subjected to static electricity interference of plus ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/36G09G2330/04
Inventor 叶才学
Owner HUIZHOU DESAY SV AUTOMOTIVE
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