Acer AL1913c Service Manual - Page 11
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Luminance of center point: L=L(5)
Brightness Uniformity Measurement points: Five specified points 1-5
Formula: Maximum [L (1), L (2), L (3), L (4), L (5)]/Minimum [L (1), L (2), L (3), L (4),
L (5)]
(3)
Definition of Response Time (T
100%
90%
Optical
10%
Response
0%
(4)
Measurement Setup:
The LCD module should be stabilized at given temperature for 20 minutes
to avoid abrupt temperature change during measuring. In order to stabilize
the luminance, the measurement should be executed after lighting Backlight
for 20 minutes in a windless room.
LCD Module
LCD Panel
Center of the Screen
, T
R
Gray Level 255
T
R
Field of View = 2 º
500 mm
11
):
F
Gray Level 255
Gray Level 0
Photometer
(TOPCON BM-5A)
Light Shield Room
(Ambient Luminance < 2 lux)
T
F
Time