Philips 7000 Series 27" 4K HDR Monitor - Manual (Page 32)

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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 display
displays a light pattern. These are the
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 TFT Display panel
in a Philips flat panel display must have
pixel or sub pixel defects exceeding the
tolerances listed in the following tables.