Philips 221TE4LB/57 Service Manual page 13

One lit red, green or blue sub pixel
Two adjacent lit sub pixels:
- Red + Blue = Purple
- Red + Green = Yellow
Green + blue = Cyan (Light Blue)
-
Three adjacent lit sub pixels (one white pixel)
Note:
A red or blue bright dot must be more than 50 percent
brighter than neighboring dots while a green bright
dot is 30 percent brighter than neighboring dots.
Black Dot Defects: Black dot defects appear as pixels
or sub pixels that are always dark or 'off'. That is, a
dark dot is a sub-pixel that stands out on the screen
when the monitor displays a light pattern. There are
some types of black dot defects:
Proximity of Pixel Defects
Because pixel and sub pixels defects of the same type
that are near to one another may be more noticeable,
Philips also specifies tolerances for the proximity of
pixel defects.
Pixel Defect Tolerances
In order to qualify for repair or replacement due to pixel
defects during the warranty period, a Philips flat
monitor panel must have pixel or sub pixel defects
exceeding the tolerances listed in the following tables.
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