Acer V223HQ

Acer Acer –LCD-B&V223HQ
6
3.2 Backlight
Panel:
Items Specification
Lamp 4 CCFL
Input Voltage 15.2V~18.5V
Input current
1.6A (Typ.), 2.2A (Max.)
On/Off switch level
5.5V≧Von≧ 2.0 V (on)
-0.3v ≤ Voff ≤ 0.8 V (off)
Brightness PWM duty
35%~100%
PWM:High=3.3V(3.0~3.6V),Low=0.0V
CCFL operating Voltage
750Vrms (Typ.),
2.0 mA (min.)(With PWM Dim)
7.0mA (Typ.)
CCFL Current
8.0mA (Max.)
CCFL startup voltage
≧1700 Vrms (0˚C)
Operating frequency 40~80 KHz
Protect delay time
> 1 second
Efficiency ≥70%(with dummy load)
3.3 Brightness output
The test to verify specifications in this section shall be performed under the following standard conditions
unless otherwise noted.
Temperature : 25 ± 5°C
Test pattern : white
Video Resolution : 1680 x 1050
Video input level : 700 mV ± 2%
Warm-up time : 30 minutes
Set brightness control and also contrast control at maximum, to measure the screen center, the light output shall
≥ 250 cd/m
2
(as panel spec)
3.4 White balance
The test standard conditions refer to Sec 3.3.(Brightness control is at 100 contrast control is at 50 )
Chromaticity Coordinate
Mode
x y
Cool
9300K 0.283 ± 0.030 0.297 ± 0.030
Warm
6500K 0.313 ± 0.030 0.329 ± 0.030
User
Panel While x Panel While y
3.5 Brightness uniformity
The test standard conditions refer to Sec 3.4.
%
≥
75
)(backlight points nine of luminance Max.
)(backlight points nine of luminance Min.
(4)