Comparison of LED and LCD
|
S.No
|
LED
|
LCD
|
|
1.
|
Consumes
more power 10 – 20 mw power per digit
|
Essentially
act as a capacitor and consumes very less power required 10 – 200 µ W power
per digit
|
|
2.
|
Because of
high power requirement it requires external interface circuitry when driven
form IC s
|
Can be
driven directly form IC chips
|
|
3.
|
Good
brightness level
|
Moderate
brightness level
|
|
4.
|
Operating
temperature range -40o C to 85o C
|
Temperature
range limited to -20o C to 60o C
|
|
5.
|
LED life
is around 1,00,000 hours
|
Lifetime
is limited to 50,000 hours due to chemical degradation
|
|
6.
|
Emits
light in red orange, yellow green and white
|
Invisible
in darkness – requires external illumination
|
|
7.
|
Operating
voltage range is 1.5 to 5V dc
|
Operating
voltage range is 3 to 20 V dc
|
|
8.
|
Response
time is 50 to 500 ns
|
Has a slow
decay time – response time is 50 to 200 ns
|
|
9.
|
Viewing
angle 150o
|
Viewing
angle 100o
|