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Note (4) Definition of Luminance of White (L
Measure the luminance of gray level 255 at center point and 5 points
L
= L (5), where L (X) is corresponding to the luminance of the point X at the figure in Note (7).
C
Note (5) Definition of Cross Talk (CT):
CT = | Y
– Y
B
Where:
Y
= Luminance of measured location without gray level 0 pattern (cd/m
A
Y
= Luminance of measured location with gray level 0 pattern (cd/m
B
(0, 0)
Y
(D/8,W/2)
A, L
Y
(D/2,7W/8)
A, D
Note (6) Measurement Setup:
The LCD assembly should be stabilized at given temperature for 30 minutes to avoid abrupt
temperature change during measuring. In order to stabilize the luminance, the measurement
should be executed after lighting Backlight for 30 minutes in a windless room.
Panel Specification
| / Y
× 100 (%)
A
A
Active Area
Y
A, U
Gray 128
Y
A, R
(D,W)
LCD
LCD Panel
Center of the Screen
Field of View = 2º
500 mm
):
C
(0, 0)
(D/2,W/8)
(D/4,W/4)
Y
(D/8,W/2)
B, L
(7D/8,W/2)
Y
(D/2,7W/8)
B, D
2
)
2
)
Active Area
Gray 0
Gray 0
Gray 128
Photometer
(TOPCON BM-5A)
Light Shield Room
(Ambient Luminance < 2 lux)
Y
(D/2,W/8)
B, U
Y
(7D/8,W/2)
B, R
(3D/4,3W/4)
(D,W)
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