Bright dead pixels LCD TV

Light / dead pixels is also known as an LCD screen bright spots , is a kind of physical damage to the LCD screen , the main part of the screen is bright spots due to internal reflection plate by external pressure or slightly deformed due to heat .

Each pixel on the LCD screen has a red, green , and blue primary colors, mix them together so that the pixel to produce various colors. A 15 -inch TFT Lcd Modules, for example , the LCD screen size 304.1mm × 228.1mm, a resolution of 1024 × 768, each liquid crystal pixel consists of RGB color units. Pour the liquid crystal liquid crystal pixel is formed under the fixed mold "LCD box" , such " crystal box" in the 15-inch liquid crystal display device number is 1024 × 768 × 3 = 235 20,000!

A " crystal box" size is how much ? We can simple calculation : High = 0.297mm, width = 0.297 / 3 = 0.099mm! That is, in the area of ​​304.1mm × 228.1mm arranged under the dense area of ​​only 2.35 million 0.297mm × 0.099mm size "LCD box" , but also in the liquid crystal cell also integrates a single driver behind the liquid crystal cell drive tube . Obviously, this production process on the production line requirements are very high , with current technology and processes, but also can not guarantee that each batch of production out of the LCD screen is not bright / dead pixels ,OLED Display manufacturers generally avoid bright / dead pixels to separate LCD panels put no bright / dead pixels or little bright / dead pixel LCD screen high-priced supply of the strength of the manufacturers , and those bright / dead pixel LCD screen is relatively large number of small manufacturers generally low-cost supply of low-cost liquid crystal display device.