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2.2
Backlight Unit
2.2.1
Parameter Guidelines for LED Backlight
The following characteristics are measured under a stable condition using an inverter
at 25°C (Room Temperature):
Parameter
LED Driver Voltage
Input Current
Power Consumption
LED_EN Voltage
PWM Frequency
PWM Duty Ratio
PWM Control Level
LED Life Time
Note1:
Condition: Ta=25°C, continuous lighting
Life time is estimated data. Definitions of failure:
1. LCM brightness becomes half of the minimum value.
2. LED doesn't light normally.
IDK-1110WR User Manual
Symbol
Min.
Typ.
LED_VCCS
9
12
ILED
-
225
PLED
-
2.7
BL On
2.3
-
BL Off
0
-
FPWM
190
DPWM
10
-
High Level
2.3
-
Low Level
0
-
50,000
10
Value
Unit
Max.
15
V
270
mA
3.3
W
5
V
0.5
V
2000
Hz
100
%
5
V
0.5
Hour
Note
VLED=12V
(duty 100%)
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