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") |
