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Note LVDS Signal Waveform.
2.2
Backlight Unit
2.2.1
Parameter Guideline for LED Backlight
Following characteristics are measured under a stable condition using an inverter at
25°C (Room Temperature):
Table 2.3: Backlight Driving Conditions
Symbol
VCC
I
VCC
P
VCC
P
PWM
I
F
V
F
P
LED
Operation
Lifetime
Note1 Ta means ambient temperature of TFT-LCD module.
Note2 VCC, Ivcc, PVCC , are defined for LED B/L.(100% duty of PWM dimming)
Parameter
Min.
Input Voltage
10.8
Input Current
-
Power Con-
-
sumption
Dimming Fre-
20
quency
Swing Voltage
3
Dimming Duty
5
Cycle
LED Forward
-
Current
-
LED Forward
Voltage
LED Power
-
Consumption
50,000
Typ.
Max.
Unit
12
12.6
[Volt]
0.17
-
[A]
2.04
2.14
[Watt]
-
20K
[Hz]
3.3
5
V
-
100
%
50
52.5
mA
21
Volt
19.2
21.9
Volt
18.3
1.92
-
Watt
Hrs
7
IDK-1108R User Manual
Remark
100% PWM
Duty
100% PWM
Duty
°
Ta = 25
C
I
= 50mA, Ta
F
°
= -30
C
I
= 50mA, Ta
F
°
= 25
C
I = 50mA, Ta
°
= 85
C
I
= 50mA, Ta
F
°
= 25
C (total
power)
I
= 50mA, Ta
F
°
= 25
C
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