Brightness Uniformity; Brightness Output; White Balance - Acer H243 Service Manual

Acer
≥75%
(DC output full loading and nominal AC input voltage range)
Ripple and Noise
Total composite ripple and noise less than 800mV for +25V output, and less than 150mV for +5V output, and 50mV for
+3.3V output tested by DC loading side parallel with a 47uF/EC and 0.1uF/Ceramic. Capacitors and measured band-width
with DC-20MHz
DC Output Voltage and Current

3.1 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 BL ≥ 240
2
cd/m (as panel spec).

3.2 White balance

The test standard conditions refer to Sec 3.1.( Brightness and contrast are under default value )
Mode
Cool
Warm
User
3.3

Brightness uniformity

The test standard conditions refer to Sec 3.1.
Min. luminance
Max. luminance
: 25 ± 5°C
: white
: 1920 x 1080
: 700 mV ± 2%
: 30 minutes
Chromaticity Coordinate
x
9300K 0.283 ± 0.030
6500K 0.313 ± 0.030
Panel While x
of nine points (backlight )
≥ 75
of nine points (backlight )
L/2
4
5
1 2
7 8
y
0.297 ± 0.030
0.329 ± 0.030
Panel While y
%
L/10
W/10
6
3
9
W/2
5
Acer –LCD-H243H