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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
Gray Level 255
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
500 mm
, T
):
R
F
Gray Level 0
T
R
Field of View = 2 º
11
Gray Level 255
T
F
Photometer
(TOPCON BM-5A)
Light Shield Room
(Ambient Luminance < 2 lux)
Time