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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. 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 LCD panel in a Philips flat panel monitor
must have pixel or sub pixel defects exceeding
the tolerances listed in the following tables.
Types of Pixel Defects
Pixel and sub pixel defects appear on the
screen in different ways. There are two
categories of pixel defects and several types of
sub pixel defects within each category.
Bright Dot Defects Bright dot defects appear
as pixels or sub pixels that are always lit or 'on'.
That is, a bright dot is a sub-pixel that stands
out on the screen when the monitor displays a
dark pattern. There are the types of bright dot
defects:
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)