LCD black screen testing method

Abstract

An LCD black screen testing method includes the steps of fixing an LCD screen and subjecting the LCD screen to vibration test; detecting whether the LCD screen subjected to vibration test is normal or not; if yes, subjecting the LCD screen to impact test. The LCD screens to be detected are subjected to vibration test and impact test, the fact that falling and transporting vibration of the LCD screens causes vibration damage of the LCD screens during actual using and the fact that external impact on the LCD screens causes impact damage of the LCD screens are simulated, and accordingly, whether the LCD black screen occurs or not after the LCD screens are subjected to vibration and impact can be detected, the LCD screens satisfactory are detected and the LCD screens damaged by vibration and impact are avoided entering the market.

Description

technical field [0001] The invention relates to an LCD screen testing technology, in particular to a method for testing a black screen of an LCD screen. Background technique [0002] LCD (liquid crystal display) is the abbreviation of Liquid Crystal Display. LCD is composed of two glass plates with a thickness of about 1mm, separated by 5μm uniform intervals containing liquid crystal materials. Because the liquid crystal material itself does not emit light, there are lamp tubes as light sources on both sides of the display screen, and there is a backlight plate (or uniform light plate) and reflective film on the back of the liquid crystal display screen. The backlight plate is composed of fluorescent substances. It can emit light, and its main function is to provide a uniform background light source. [0003] The types of LCD background light sources mainly include CCFL backlight and LED backlight. CCFL is the abbreviation of Cold Cathode Fluorescent Lamp. . [0004] Cold...

AI Technical Summary

Problems solved by technology

[0006] With the development of science and technology, the application of LCD is more and more extensive. After the LCD is produced, transported and transported, the user often finds that the LCD cannot be started when the user turns on the display.

This phenomenon is largely due to the damage of the CCFL by the impact environment in various links, resulting in the rupture of the CCFL wave tube or the abnormal loosening of the electrodes at both ends of the CCFL, which eventually led to the failure of the CCFL to start normally and the abnormality of the LCD not being able to light up, resulting in Certain economic loss and loss of customers

The main reason for this situation is that the abnormality of the LCD black screen was not detected before the product was launched, and the reliable data was not provided

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