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