The Light Sources Of Backlights

       It is very import to choose the right light source for the design of backlights. The light sources you are using not only determine opto-electronic parameters of consumption, luminance, color and other optical parameters, but also decide the features of using conditions and serving time.

Light source  shape

Light source kind

Light source wave length (temperature)

Power

Serving time

feature

Consumption

(h)

(w)

 

Point Source Light

lamp bulb

2800k

1.0above

2000

Simple, compact, big, serious heating

Any kind

LED

430-700nm

0.038

100,000

Long Serving time, low heat, low brightness

Linear source light

CCFL

Blue red green and the mix color

1.0-10.0

25

High brightness, long serving time, high inverter driving voltage

 

HCFL

 

1.0-220

5000-7000

Serious heating

 

VFD

 

200mW/cm2 below

5000

High brightness, good uniformity, double power source driving

 

EL

 

20mW/cm2 below

5,000

Thin, good uniformity, low brightness, short serving time

 

OELD

 

 

1,000

Thin, good uniformity, high brightness, short serving time

 

FED

 

 

10,000

High brightness, Exploring

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