Manual Philips 40B1U6903CH (page 43 of 52) (English)

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11. Customer care and

warranty

11.1 Philips’ Flat Panel Displays

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

and/or replaced under warranty. This

notice explains the dierent types of

pixel defects and denes acceptable

defect levels for each type. 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 the

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 dierent 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'.

Meaning, a bright dot is a sub-pixel

that stands out on the screen when the

monitor displays a dark pattern. There

are three types of bright dot defects:

One lit red, green, or blue sub-pixel.

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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Philips 40B1U6903CH Manual

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