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Dark Dot Defects
Black dot defects appear as pixels or sub-pixels that are always dark or "off". These are the examples of black dot defects:
One dark dot
Proximity of Pixel Defects
Because pixel and sub-pixels defects of the same type that are nearby one another may be more noticeable, Philips also specifies
tolerances for the proximity of pixel defects. In the table below you can find specifications about:
Allowed amount of adjacent dark dots = (adjacent dark dots =1 pair of dark dots)
Minimum distance between dark dots
Total no. of all defective dots
Pixel Defect Tolerances
In order to qualify for repair due to pixel defects during the warranty period, a PDP / TFT panel in a Philips LCD- display must
have pixel or sub-pixel defects exceeding the tolerances listed in the following table.
BRIGHT DOT EFFECT
MODEL
1 lit sub pixel
2 adjacent lit sub pixels
3 adjacent lit sub pixels (one white
pixel)
50% ~ Less Dot (Weak Dot)
Distance between two bright dot
defects*
Total bright dot defects of all types
BLACK DOT EFFECT
1 dark sub pixel
2 adjacent dark sub pixels
3 adjacent dark sub pixels
Distance between two black dot
defects*
Total black dot defects of all types
TOTAL DOT DEFECTS OF
ALL TYPES
Note:
* 1 or 2 adjacent sub pixel defects = 1 dot defect
Two adjacent dark dots=
1 pair of dark dots
ACCEPTABLE LEVEL
BDL4635E
3
1
0
7
5mm
7
ACCEPTABLE LEVEL
9
3
1
NA
9
10
Two
dark
defines
the minimum distance
between dark dots
43
User Manual BDL4635E
dots, specifications
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