CCFL for LCD Backlighting

CCFL serves as the illumination source for LCD, frequently employing fluorescent Lamps, which is composed by a phosphor coated glass cylinder with cathodes at each end.

LCD backlight mainly consists of light source, diaphragm, light leading board and plastic frame. It has high brightness, long lifetime and good uniformity features etc.

There are three popular types LCD backlight source, EL, CCFL and LED at present, with side or vertical position source. Side position lighting source CCFL has become the mainstream as LCD is becoming brighter, lighter and thinner.

As far as application area is concerned, EL and LED are used in small size and single color display (red or green). Recently white light (panchromatic) EL and LCD have come into being. Because of lower brightness they are used in less than 4 inches LCD screen such as mobile phone, PDA, game machine etc. However, for panchromatic (white light), big dimension or high brightness, CCFL is the best choice. Moreover, many years technique research has made CCFL much mature, reliable, stable capacity.

CCFL is well adopted in large and middle scale (19-3 inches) of the TFT LCD screen now. For civilian use CCFL can be the best choice in the following,

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