Philips 191TE2L - Manual (Page 25)

10 Pixel policy
Philips strives to deliverthe highest quality
products.We use some ofthe industry's most
advanced manufacturing processes and practice
stringent quality control. However; pixelor
sub pixeldefects on a flat monitor panelare
sometimes unavoidable. No manufacturer can
guarantee that all panels willbe free from pixel
defects, but Philips guarantees that any monitor
with an unacceptable numberofdefects willbe
repaired orreplaced underwarranty.This notice
explains the different types of pixeldefects and
defines acceptable defect levels for each type.
In orderto qualify for repair or replacement
under warranty the number ofpixeldefects on
a monitor panelmust exceed these acceptable
levels. For example, no more than 0.0004% of
the sub pixels on a monitor may be defective.
Furthermore, Philips sets even higherquality
standards for certain types or combinations
of pixeldefects that are more noticeable than
others.This policy is valid worldwide.
Pixels and Sub pixels
A pixel, or picture element, is composed of
three sub pixels in the primary colors ofred,
green and blue. Many pixels togetherform an
image. When all sub pixels ofa pixelare lit,
the three colored sub pixels together appear
as a single white pixel. When allare dark, the
three colored sub pixels together appear as a
single black pixel. Other combinations of lit and
dark sub pixels appear as single pixels of other
colors.
Types of Pixel Defects
Pixeland sub pixeldefects appear on the
screen in different ways.There are two
categories ofpixeldefects and severaltypes of
sub pixeldefects 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-pixelthat stands
out on the screen when the monitor displays a
dark pattern.
These are some types of bright dot defects:
Two adjacent lit sub pixels:
- Red + Blue = Purple
- Red + Green =Yellow
- Green + Blue = Gyan (Light Blue)
Three adjacent lit sub pixels (one white pixel)
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