A liquid crystal display, or LCD is an electronic display device that operates by applying a varying electric voltage to liquid crystals.
Liquid crystals are substances that have properties between a liquid and a solid. To give an example, a crystal may flow like a liquid, but the molecules may be crystal- like. liquid crystals are interesting because they don't exactly fall under the three main states of matter- solid, liquid, or gas.
Liquid crystals do not emit light directly, but have light modulating properties that have many applications in today's world. LCD consists of an array of tiny segments called pixels that can be manipulated to present information. LCD's are commonly used in video projection systems, as monitors for computers, and in flat- panel televisions.