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> What is LCD? An LCD, or Liquid Crystal Display, is a type of screen that is used in many computers, TVs, and cell phones. LCDs are very thin, but are actually composed of several layers. Those layers include two polarized panels, with a liquid crystal solution between them. Light is projected through the layer of liquid crystals and is colorized, which produces the visible image. The liquid crystals do no emit light themselves, so LCDs require a backlight.Two types of LCDs are primarily found in cell phones: TFT (thin-film transistor) and IPS (in-plane-switching). TFT LCDs use the thin-film