( ) is a thin, flat electronic visual display that user the light modulating properties of liquid crystal(LCs). They are use in a wide range of applications including computer monitors, television, instrument panels, aircraft cockpit displays, signage, etc. ( )s have displaced cathode ray tube(CRT) displays in most applications. the are usually more compact, lightweight, portable, less expensive, more reliable, and easier on the eyes, They are available in a wider range of screen size than CRT and plasm displays, and since they do not use phosphors, they cannot suffer image burn-in