Philips 190VW8FB/93 Service Manual page 67

BRIGHT DOT DEFECTS
MODEL
1 lit sub-pixel
2 adjacent lit sub-pixels
3 adjacent lit sub-pixels (one white pixel)
Distance between two bright dot defects*
Bright dot defects within 20 mm circle
Total bright dot defects of all type
BLACK DOT DEFECTS
MODEL
1 dark sub-pixel
2 adjacent dark sub-pixels
3 adjacent dark sub-pixels (one white pixel)
Distance between two black dot defects*
Black dot defects within 20 mm circle*
Total black dot defects of all type
TOTAL DOT DEFECTS
MODEL
Total bright or black dot defects of all type
* 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:
Test condition:
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:
Where B_max = Maximum brightness
B_min = Minimum brightness
1440X900 at 75 Hz
video input (RGB) = maximum white
B_min
X 100%>75%
B_max
ACCEPTABLE LEVEL
190VW8
3
1
0
≧25mm
0
3
ACCEPTABLE LEVEL
190VW8
5
2
0
≧15mm
1
5
ACCEPTABLE LEVEL
190VW8
5
190VW8 LCD
67