LCD backlight serve as the illumination source for LCD. LCD backlight frequently employ fluorescent Lamps. Fluorescent Lamp consists of a phosphor coated glass cylinder with cathodes at each end.

Carry light source to offer LCD light source of panel. Mainly by light source, lead all board, optics made up of diaphragm, plastic frame,etc.. Carry light source have luminance to be high, longe-lived giving out light characteristic such as being even. Have EL, CCFL, LED three carry light source type mainly at present , distribute position with divide into and incline person who carry and go to type direct in accordance with light source.

To brighter, more light constantly, thin direction develop with LCD mould group, incline person who carry CCFL type carry light source become at present carrying light source mainstream of development. As regards range of application, EL, used in light size, monochromatic light( getting green, red) mainly by LED. Have white light( panchromatic) EL and LCD carry light source come out successively too recently. But because luminance use than dark their for 4 following little size liquid crystal show basically.
For instance: Cell-phone, PDA, game machine,etc.. Getting panchromatic, large size luminance carry light source, mainstream to make the light source with CCFL still now, And riper through the development technological craft for many years, the trusting is high, Performance is steady. TFT LCDs generally use CCFL for the large-and-middle-scale size( 19-3 inches) now. There are itses concrete product for civilian use: Liquid crystal TV( 20" - 30"); Liquid crystal computer display( 14" - 10"); Portable computer display( 8" - 14"); Portable DVD player( 5"- 9); Automobile, train,, plane TV, GPS show ( 3" - 5") year; Lottery game machine( 3" - 5"); Portable TV( 3" - 5"); Children person who study, palmtop computer, game machine( 3" - 5"); Instrument, industry of OA, show ( 5" - 10"); Videophone( 5" - 10")