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Back Light
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The following table compares the various back light options. Use this as a guide in choosing the type of back light, if any, you want with your LCD.
|
| TYPE OF BACKLIGHT |
VISIBILITY |
POWER CONSUMPTION |
COST |
RFI GENERATION |
BRIGHTNESS CONTROL |
COMMENTS |
|
None
|
Not usable in low ambient light conditions
|
Best
(no power used)
|
Lowest
|
None
|
N/A
|
N/A
|
|
EL
|
Usable in all lighting conditions
|
Very good 30mW
|
Good
|
Some (at low frequency)
|
Fixed brightness
|
Best for battery powered instruments
|
|
LED
|
Useable in all lighting conditions
|
Good 60mW
|
Good
|
None
|
Adjustable over wide range
|
Most popular on small displays
|
|
CCFL
|
Not usable in high ambient light conditions
|
Fair 700mW
|
Most costly
|
Some (at high frequency)
|
Adjustable over limited range
|
Most popular on larger graphic displays
|
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| TOP |
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