How to detect the LCD screen bad spots and highlights?
May 15, 2018
With the development of LCD screen manufacturing technology, although the display effect of the LCD screen has been greatly improved, the phenomenon of dead pixels and bright spots on the LCD screen is still difficult to avoid. So when we buy industrial LCD screens, LCD monitors, etc. in the end how to check the LCD screen is there any dead pixels? The following Xiao Bian will like you briefly introduce some methods to detect the LCD screen dead pixels.
LCD screen highlights
LCD screen dead pixels
How to detect dead pixels:
1 After purchasing the LCD, make sure to check whether the LCD is dead before receiving the goods. Can use special test discs for testing, such as "AVIA", "HiviCast", "DigitalVideoEssentials", etc., are available for sale in general audio and video stores.
2 Full-screen displays pure black, pure white or pure red, pure green, and pure blue monochromatic backgrounds. Carefully check whether black, white, and different colored light spots appear under solid monochromatic color. If yes, the liquid crystals are Bad point.
The method of detecting the bright spots and general bad spots of LCD TV screens:
The common problem with the dead pixels is that the colors are not controlled, and only solid colors such as black and white are displayed, and images cannot be formed in accordance with the appearance of dark changes.
Highlights: Highlights are also a kind of dead pixels, which means that only one or two drive tubes in the three liquid crystal cells of the corresponding pixel have failed, then they will appear in red, green, and blue in a black background. Pixels; or points that originally should be red, green, and blue, appear white, and these can be judged as bright spots and also as a kind of dead pixels.
General bad point: A pixel that appears as a pure black or pure white on any color background is a dead pixel. This may be due to a failure of the three liquid crystal cell drive tubes of the corresponding pixels.
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