T140B ACER, T140B Datasheet - Page 15

• Manufacturer Part Number: T140B
• Description: COLOR TFT LCD MODULE
• Manufacturer: ACER

7.0 Parameter guide line for CFL Inverter
Note 1:
Note 2: It should be emplyed the inverter which has “Duty Dimming”, if ICFL is less than 4mA.
Note 3: CFL discharge frequency shouldbe carefully determined to avoid interference between inverter and
Note 4: CFL inverter should be able to give out a power that has a generating capacity of over 1,400
Note 5: Calculator value for reference (ICFL×VCFL=PCFL)
Parameter
White Luminance(5points average)
CCFL current(ICFL)
CCFL Frequency(FCFL)
CCFL Ignition Voltage(Vs)
CCFL Voltage (Reference)
(VCFL)
CCFL Power consumption
(PCFL)
*1 All of characteristics listed are measured under the condition using the ADT Test inverter.
*2 In case of using an inverter other than listed, it is recommended to check the inverter carefully.
*3 In designing an inverter, it is suggested to check safety circuit ver carefully. Impedance of CFL, for
*4 Generally, CFL has some amount of delay time after applying kick-off voltage. It is recommended to
*5 CFL discharge frequency must be carefully chosen so as not to produce interfering noise stripes on
*6 Reducing CFL current increases CFL discharge voltage and generally increases CFL discharge
TFT LCD.
voltage. Lamp units need 1,400 voltage minimum for ignition.
Sometimes, interfering noise stripes appear on the screen, and substandard luminance or flicker at
low power may happen.
instance, becomes more than 1 [M ohm] when CFL is damaged.
keep on applying kick-off voltage for 1 [Sec] until discharge.
the screen.
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.
130
Min
2.0
40
Typ
150
660
5.5
3.6
15
50
/
15
1400 rms[Volt]
Max
6.5
60
Units
[cd/m
rms [mA]
[KHz]
rms [Volt]
[Watt]
2
]
Condition
(Ta=25℃)
(Ta=25℃) Note 2
(Ta=25℃) Note 3
(Ta= 0℃) Note 4
(Ta=25℃) Note 5
(Ta=25℃) Note 5