Black Dot Defects; Proximity Of Pixel Defects; Pixel Defect Tolerances - Philips 220E User Manual

Two adjacent lit sub pixels:
- Red + Blue = Purple
One lit red, green or blue sub
- Red + Green = Yellow
pixel
- Green + Blue = Cyan (Light Blue)
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 two
types of black dot defects:
One dark sub pixel

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.
BRIGHT DOT DEFECTS
MODEL
Three adjacent lit sub pixels
(one white pixel)
Two or three adjacent dark sub pixels
ACCEPTABLE LEVEL
220E