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22
7. Customer care and warranty
8. Customer care and
warranty
8.1 Philips’ Flat Panel Monitors
Pixel Defect Policy
Philips strives to deliver the highest quality
products. We use some of the industry's
most advanced manufacturing processes
and practice stringent quality control.
However, pixel or sub pixel defects on
the TFT Monitor panels used in at panel
monitors are sometimes unavoidable.
No manufacturer can guarantee that all
panels will be free from pixel defects, but
Philips guarantees that any monitor with
an unacceptable number of defects will be
repaired or replaced under warranty. This
notice explains the dierent types of pixel
defects and denes acceptable defect
levels for each type. In order to qualify for
repair or replacement under warranty, the
number of pixel defects on a TFT Monitor
panel must 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
higher quality standards for certain types
or combinations of pixel defects that are
more noticeable than others. This policy is
valid worldwide.
subpixel
pixel
Pixels and Sub pixels
A pixel, or picture element, is composed
of three sub pixels in the primary colors of
red, green and blue. Many pixels together
form an image. When all sub pixels of a
pixel are lit, the three colored sub pixels
together appear as a single white pixel.
When all are 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
Pixel and sub pixel defects appear on the
screen in dierent 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)
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