Protection device for improper power outage of liquid crystal display monitor
A power-off protection device, liquid crystal display technology, applied in static indicators, instruments, data processing power supplies, etc., can solve problems such as inability to comply with liquid crystal display screen monitors, abnormal liquid crystal conversion time, and inrush current pixel white images.
Inactive Publication Date: 2016-11-09
SUZHOU ZHONGXIAN ELECTRONICS SCI & TECH
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Problems solved by technology
However, according to the normal shutdown procedure stipulated by the LCD Monitor manufacturer, the computer must turn off the output of the digital image signal and the control signal in order before cutting off the power signal, but in the public LCD monitor ( LCDMonitor) structure, when the power supply is suddenly cut off or the user shuts down improperly, the three signals (1) power signal (2) digital image signal (3) control signal will be cut off at the same time, which cannot meet the requirements of the LCD monitor ( LCD Monitor) manufacturer's specifications, so it is very likely to cause the following problems: (a) Inrush current is generated (b) Pixels will have a white screen (c) The switching state of the liquid crystal inside the liquid crystal display screen is abnormal, making the liquid crystal display The service life of screen monitor (LCD Monitor) shortens, and how to solve the defective of above-mentioned various common technical means, and provide practical technical means to complete, is the main purpose of the present invention
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[0016] see figure 2 , which is a schematic block diagram of a preferred embodiment of the present invention, wherein when using AC power supply, the detector 111 detects the DC voltage output from the AC-DC power converter 10 (Adapter) to the DC conversion module 11 (DC / DC Module) value, and when the battery 12 is used for power supply, the DC voltage value output from the battery 12 to the DC conversion module 11 (DC / DCModule) is detected. In addition, the detector 111 also detects the old switch button of the liquid crystal display screen monitor state, when in general normal use state, the detector 111 outputs a certain value high state voltage signal, at this time, it is used to complete the RC delay circuit of the first signal delay element 14, the second signal delay element 15 and the second signal delay element 16 , wherein the first parallel capacitor Cl, the second parallel capacitor C2 and the third parallel capacitor C3 are all charged and maintain a high-state vo...
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Provided is a protection device for improper power outage of a liquid crystal display (LCD) monitor. According to the device, the digital image signal, the control signal and the power signal are closed in order mainly through action of a detector, a signal delay element and a controlled switch. Thus, the specification requirement of LCD monitor manufacturers is met, and the defects of the common technology are avoided.
Description
technical field [0001] The invention relates to an improper power-off protection device, in particular to an improper power-off protection device for liquid crystal display screen monitoring. Background technique [0002] The design and development of electronic products mostly aim at lightness, thinness, and shortness. Computer monitors are no exception. Traditional cathode ray tube (Cathode-Ray Tube) monitors have low power consumption due to their large size. Ideal, therefore, the liquid crystal display screen monitor (LCD Monitor) that appearance is light and thin and comparatively power saving promptly becomes the new generation display that is paid more and more attention to. [0003] see figure 1 , which is a schematic block diagram of the signal receiving end of the LCD monitor 01 (LCD Monitor) currently on the market, and the signal types are mainly divided into three types: (1) source signal (2) digital image signal (3) control signal, Among them, the power supp...
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Login to View More IPC IPC(8): G09G3/36G06F1/30
CPCG09G3/36G06F1/30
Inventor 杨黎明
Owner SUZHOU ZHONGXIAN ELECTRONICS SCI & TECH