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LCD – Liquid Crystal Display

An LCD is a display that consists of 2 layers of glass with a super-thin layer of liquid crystal sandwiched between them.The gap between the 2 layers of glass is as little as 6µm (to put that into contect, a human hair is 50-60µm). Liquid crystals do not emit light directly, instead using their light modulating properties with a backlight or reflector that provides light to individual pixels arranged in a grid. Each pixel has a red, green, and blue RGB sub-pixel that can be turned on or off.

When all of a pixel's sub-pixels are turned off, it appears black. When all the sub-pixels are turned on 100%, it appears white. By adjusting the individual levels of red, green, and blue light, millions of color combinations are possible.

LCD Construction

LCD displays come in many variations including TN, STN and TFT