LCD screen hardness test method

Abstract

The invention provides an LCD screen hardness test method. The LCD screen hardness test method comprises the following steps: an impact test is conducted on an LCD screen at normal temperature; whether the LCD screen works normally or not after the impact test is detected, and if yes, an impact test is conducted at preset temperature; whether the LCD screen works normally after the impact test at preset temperature or not is detected, and if yes, the LCD screen is cooled; the impact test is conducted on the LCD screen at normal temperature again after the LCD screen is cooled; whether the LCD screen which is subjected to the impact test at normal temperature after being cooled works normally or not is detected. According to the LCD screen hardness test method, the LED screen is directly subjected to the impact test, subjected to the impact test again at high temperature (55DEG C-65DEG C) and subjected to the impact test after being cooled from the high temperature, as a result, the situation that the LCD screen is subjected to impact or collision outdoors can be simulated, and whether the hardness of the LCD screen meets the requirement of outdoor use or not can be detected.

Description

technical field [0001] The invention relates to LCD screen testing technology, in particular to a LCD screen hardness testing method. Background technique [0002] The structure of LCD (Liquid Crystal Display) is to place a liquid crystal cell between two parallel glass substrates, set a TFT (thin film transistor) on the lower substrate glass, and set a color filter on the upper substrate glass, and pass the signal on the TFT The rotation direction of the liquid crystal molecules is controlled by changing the voltage, so as to control whether the polarized light of each pixel is emitted or not to achieve the display purpose. Liquid crystals are organic compounds composed of long rod-shaped molecules whose long axes are approximately parallel in their natural state. The basic principle of LCD display is to fill the liquid crystal material between two parallel plates, and change the arrangement of molecules inside the liquid crystal material through voltage to achieve the pur...

AI Technical Summary

Problems solved by technology

Due to the harsh outdoor environment, LCD screens may be hit by flying sand and stones or by some accidental impacts when used outdoors. At the same time, LCDs are also subjected to abnormal impacts in public transportation, which will eventually lead to cracks on the LCD glass substrate or abnormal deflection of the LCD liquid crystal. , affect the normal use and work of the LCD

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