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7. Customer care and warranty
7. Customer care and
warrant
7.1 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 flat 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 different types of pixel defects and defines
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 20" XGA 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.
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 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)
