Philips 190VW8FB/93, Service Manual

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BRIGHT DOT DEFECTS ACCEPTABLE LEVEL
MODEL
190VW8
1 lit sub-pixel 3
2 adjacent lit sub-pixels 1
3 adjacent lit sub-pixels (one white pixel) 0
Distance between two bright dot defects*
≧
25mm
Bright dot defects within 20 mm circle 0
Total bright dot defects of all type 3
BLACK DOT DEFECTS ACCEPTABLE LEVEL
MODEL
190VW8
1 dark sub-pixel 5
2 adjacent dark sub-pixels 2
3 adjacent dark sub-pixels (one white pixel) 0
Distance between two black dot defects*
≧
15mm
Black dot defects within 20 mm circle* 1
Total black dot defects of all type 5
TOTAL DOT DEFECTS ACCEPTABLE LEVEL
MODEL
190VW8
Total bright or black dot defects of all type 5
* 1 or 2 adjacent sub-pixel defects = 1 dot defect
8.8 Newton Ring
No Newton Rings visible.
8.9 Luminance Output
8.9.1 Luminance Output
Test resolution: 1440X900 at 75 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%>75%
B_max
Where B_max = Maximum brightness
B_min = Minimum brightness
67 190VW8 LCD
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