Device for improving reliability of panel driving equipment

Abstract

The invention provides a device for improving the reliability of panel driving equipment. The device mainly comprises the following modules: an input power supply module for providing a working voltage, a control signal module for outputting a control signal to control the working state of liquid crystal display equipment, a voltage selection module for selecting a rated working voltage for a liquid crystal load, a voltage stabilization module, an overcurrent protection module and the liquid crystal load. The voltage stabilizing module receives a high / low level control signal output by the control signal module, can control an input working voltage to preferentially charge a delay capacitor at the moment of power-on, provides a certain power-on delay buffer time for a liquid crystal load, and prevents the liquid crystal load from being burnt out due to the increase of the instantaneous voltage; and the overcurrent protection module is used for detecting the working current of the liquid crystal load by using a sampling resistor and an operational amplifier, rapidly pulling down a control signal to GND when the current is too large, and rapidly closing the whole working device. The protection device has the advantages that the liquid crystal screen is effectively protected, equipment work is stabilized, the structure is simple, and cost is low.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a device for improving the reliability of panel driving equipment. Background technique [0002] With the development of science and technology, liquid crystal display (Liquid Crystal Display, LCD) has a wide range of applications in many fields, has the advantages of thin body, low power consumption, low voltage drive, etc. Computers, smart phones, notebook computers, digital cameras and various projection equipment, occupying a dominant position in the field of flat panel display. [0003] The liquid crystal panel is mainly composed of a thin film transistor array substrate (Thin Film Transistor Array Substrate, TFT Array Substrate), a color filter substrate (Color Filter, CF), and a liquid crystal layer (Liquid Crystal Layer) arranged between the two substrates. The working principle is that the drive circuit provides a drive voltage and applies the drive volta...

AI Technical Summary

Problems solved by technology

[0004] Due to defects in the manufacturing process, the liquid crystal display device may experience voltage instability and excessive inrush current at the moment of power-on and during use.

In order to control the stability of the liquid crystal display device, it is necessary to introduce protection devices such as voltage stabilization and overcurrent protection for the liquid crystal display device, but these devices are very complicated and costly

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