Energy 220ws8fb/00, Service Manual

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8.8 Newton Ring
No Newton Rings visible.
8.9 Luminance Output
8.9.1 Luminance Output
Test resolution: 1680 x 1050 at 60 Hz
Test condition: video input (RGB) = maximum white
8.9.2 Brightness
To follow Panel specification. sRGB = 80 ± 10 nits.
8.9.3 Brightness uniformity
Set contrast at 100% and turn the brightness to get average above 300 nits at centre of the screen.
Apply the Fig 1, it should comply with the following formula:
B_min
X 100%
B_max
Where B_max = Maximum brightness
B_min = Minimum brightness
8.10 White Uniformity
Definition of White Variation
(δ
W):
Measure the luminance of gray level 255 at 9 points
δ
W = Maximum [L(1), L(2) …… L(9)] / Minimum [L(1), L(2) …… L(9)]
Typical : 1.3
Maximum : 1.5
66 220WS8 LCD
9
2
4 5
6
7 8
1 3
10%
50%
90%
10%
50%
90%