B121EW08-V0 AUO, B121EW08-V0 Datasheet - Page 15

• Manufacturer Part Number: B121EW08-V0
• Description: WXGA Color TFT-LCD
• Manufacturer: AUO

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5.2 Backlight Unit
Parameter guideline for CCFL Inverter
Note 1: Typ are AUO recommended Design Points.
Note 2: It should be employed the inverter which has “Duty Dimming”, if ICCFL is less than 4mA.
Note 3: CCFL discharge frequency should be carefully determined to avoid interference between inverter and
Note 4: The frequency range will not affect to lamp life and reliability characteristics.
Note 5: CCFL inverter voltage should be able to give out a power that has a generating capacity larger than
document version 0.1
Parameter
CCFL current each Lamp (I
CCFL Frequency(F
CCFL Startup Voltage(V
CCFL Startup Voltage(V
CCFL Voltage (Reference)
(V
CCFL Power consumption
for 2 Lamp (P
CCFL
)
*1 All of characteristics listed are measured under the condition using the AUO Test inverter.
*2 In case of using an inverter other than listed, it is recommended to check the inverter carefully.
Sometimes, interfering noise stripes appear on the screen, and substandard luminance or flicker at low
power may happen.
*3 In designing an inverter, it is suggested to check safety circuit very carefully. Impedance of CCFL,
for instance, becomes more than 1 [M ohm] when CFL is damaged.
*4 Generally, CCFL has some amount of delay time after applying kick-off voltage. It is recommended
to keep on applying kick-off voltage for 1 [Sec] until discharge.
*5 CCFL discharge frequency must be carefully chosen so as not to produce interfering noise stripes on
the screen.
*6 Reducing CCFL current increases CCFL discharge voltage and generally increases CCFL discharge
frequency. So all the parameters of an inverter should be carefully designed so as not to produce too
much leakage current from high-voltage output of the inverter.
TFT LCD.
the lamp startup voltage, otherwise backlight may has blinking for a moment after turns on or can not
be turned on.
CCFL
)
CCFL
)
s
s
)
)
CCFL
)
Product Specification
B121EW08 V0
Min
5.0
45
-
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1150
Typ
920
550
5.5
55
-
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Max
1400
1110
6.0
7.8
65
[Volt] rms
[Volt] rms
[Volt] rms
[mA] rms
[Watt]
Units
[KHz]
Condition
(Ta=25 )
Note 2
(Ta=25 )
Note 3,4
(Ta= 0 )
Note 5
(Ta= 25 )
Note 5
(Ta=25 )
Note 6
(Ta=25 )
Note 6
℃
℃
℃
℃
℃
℃
15
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