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A liquid-crystal display (LCD) is a flat panel display, electronic visual display, or video display that uses the light modulating properties of liquid crystals. Liquid crystals do not emit light directly.<ref>http://www.merriam-webster.com/dictionary/lcd</ref>

LCDs are available to display arbitrary images (as in a general-purpose computer display) or fixed images with low information content which can be displayed or hidden, such as preset words, digits, and 7-segment displays as in a digital clock. They use the same basic technology, except that arbitrary images are made up of a large number of small pixels, while other displays have larger elements.

LCDs are used in a wide range of applications including computer monitors, televisions, instrument panels, aircraft cockpit displays, and signage. They are common in consumer devices such as DVD players, gaming devices, clocks, watches, calculators, and telephones, and have replaced cathode ray tube (CRT) displays in nearly all applications. They are available in a wider range of screen sizes than CRT and plasma displays, and since they do not use phosphors, they do not suffer image burn-in. LCDs are, however, susceptible to image persistence.<ref name=Fujitsu>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

The LCD screen is more energy efficient and can be disposed of more safely than a CRT. Its low electrical power consumption enables it to be used in battery-powered electronic equipment. It is an electronically modulated optical device made up of any number of segments controlling a layer of liquid crystals and arrayed in front of a light source (backlight) or reflector to produce images in color or monochrome. Liquid crystals were first discovered in 1888.<ref> {{#invoke:citation/CS1|citation |CitationClass=book }}</ref> By 2008, annual sales of televisions with LCD screens exceeded sales of CRT units worldwide, and the CRT became obsolete for most purposes.


Liquid-crystal display sections
Intro  Overview  History  Illumination  Connection to other circuits  Passive and active-matrix  Active-matrix technologies  Quality control  Zero-power (bistable) displays  Specifications   Advantages and disadvantages   See also  References  External links  

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Display::color    Liquid::title    Which::displays    Light::pixels    Image::liquid    Crystals::power

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A liquid-crystal display (LCD) is a flat panel display, electronic visual display, or video display that uses the light modulating properties of liquid crystals. Liquid crystals do not emit light directly.<ref>http://www.merriam-webster.com/dictionary/lcd</ref>

LCDs are available to display arbitrary images (as in a general-purpose computer display) or fixed images with low information content which can be displayed or hidden, such as preset words, digits, and 7-segment displays as in a digital clock. They use the same basic technology, except that arbitrary images are made up of a large number of small pixels, while other displays have larger elements.

LCDs are used in a wide range of applications including computer monitors, televisions, instrument panels, aircraft cockpit displays, and signage. They are common in consumer devices such as DVD players, gaming devices, clocks, watches, calculators, and telephones, and have replaced cathode ray tube (CRT) displays in nearly all applications. They are available in a wider range of screen sizes than CRT and plasma displays, and since they do not use phosphors, they do not suffer image burn-in. LCDs are, however, susceptible to image persistence.<ref name=Fujitsu>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

The LCD screen is more energy efficient and can be disposed of more safely than a CRT. Its low electrical power consumption enables it to be used in battery-powered electronic equipment. It is an electronically modulated optical device made up of any number of segments controlling a layer of liquid crystals and arrayed in front of a light source (backlight) or reflector to produce images in color or monochrome. Liquid crystals were first discovered in 1888.<ref> {{#invoke:citation/CS1|citation |CitationClass=book }}</ref> By 2008, annual sales of televisions with LCD screens exceeded sales of CRT units worldwide, and the CRT became obsolete for most purposes.


Liquid-crystal display sections
Intro  Overview  History  Illumination  Connection to other circuits  Passive and active-matrix  Active-matrix technologies  Quality control  Zero-power (bistable) displays  Specifications   Advantages and disadvantages   See also  References  External links  

PREVIOUS: IntroNEXT: Overview
<<>>