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A protection circuit and a liquid crystal display device

A technology for protecting circuits and protecting voltages, which can be used in static indicators, nonlinear optics, instruments, etc., and can solve the problems of abnormal display, abnormal, fragile first common voltage VCOM1 voltage value, etc.

Active Publication Date: 2018-01-16
KUSN INFOVISION OPTOELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the knob of the knob resistance VR included in the common voltage supply circuit of the prior art generally adopts a ceramic structure. When it is subjected to a relatively large external force, for example, when it is impacted by a heavy object during a gravity test, it is easy to break, so that the first common voltage VCOM1 The voltage value is abnormal (zero), which will cause abnormal display screen

Method used

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  • A protection circuit and a liquid crystal display device
  • A protection circuit and a liquid crystal display device
  • A protection circuit and a liquid crystal display device

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Embodiment Construction

[0023] In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] Although the present invention uses the terms first, second, third, etc. to describe various elements, signals, ports, components or sections, these elements, signals, ports, components or sections are not limited by these terms. These terms are only used to distinguish one element, signal, port, component or section from another element, signal, port, component or section. In the present invention, one element, port, component or part is "connected" or "connected" with another element, port, component or part, which can be understood as a direct electrical connection, or can also be understood as an indirect electrical connection between intermediate elements. sexual connection. Unless otherwise defined, all terms (including...

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Abstract

The invention provides a protection circuit used for outputting protection voltage when a public voltage providing circuit goes wrong. The protection circuit includes a detection unit and a protection voltage providing unit. The detection unit is used for detecting whether the public voltage providing circuit is abnormal or not and outputting detection signals. The protection voltage providing unit is connected with the detection unit and used for outputting protection voltage when the detection unit detects that the public voltage providing circuit is abnormal. The invention also provides a liquid crystal display device employing the above protection circuit. According to the invention, protection voltage can only be output when the public voltage providing circuit goes wrong, so that the stability of the liquid crystal display device is ensure and a simple structure is realized.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a protection circuit and a liquid crystal display device. Background technique [0002] Liquid Crystal Displays (LCDs) have many advantages such as lightness, thinness, energy saving, and no radiation, and thus have gradually replaced traditional cathode ray tube (CRT) displays. Currently, liquid crystal displays are widely used in electronic devices such as high-definition digital televisions, desktop computers, personal digital assistants (PDAs), notebook computers, mobile phones, and digital cameras. [0003] Taking a thin film transistor (Thin Film Transistor, TFT) liquid crystal display device as an example, it includes a liquid crystal display panel and a driving circuit. The liquid crystal display panel has a common electrode, a pixel electrode and a liquid crystal layer between the common electrode and the pixel electrode. The driving circuit applies the common ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G02F1/133
CPCG02F1/13318G09G3/3696
Inventor 赵乐方晴吴二平
Owner KUSN INFOVISION OPTOELECTRONICS