A liquid crystal display (LCD) is a thin, flat display device made up of any number of color or monochrome pixels arrayed in front of a light source or reflector. Because of its low power consumption and other benefits, LCD has been widely used in laptops, PDAs, desktops, digital projectors and television.

LCD technology still has a few drawbacks in comparison to some other display technologies. While CRTs are capable of displaying multiple video resolutions, each with the same quality, LC displays usually produce the crispest images in a "native resolution". Secondly, LCD displays generally have a lower contrast ratio than that on a plasma display or CRT. This is due to their "light valve" nature: some light always leaks out making black grey. Thirdly, LCDs have longer response time than their plasma and CRT counterparts, creating ghosting and mixing when images rapidly change; this caveat however is continually improving as the technology progresses. Finally the viewing angle of a LCD is usually less than that of most other display technologies thus reducing the number of people who can conveniently view the same image.

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