Philips 7000 series Gebruikershandleiding - Pagina 31

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Philips 7000 series Gebruikershandleiding

8. Customer care and

warranty

8.1 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 Display panels used

in flat panel displays are sometimes

unavoidable. No manufacturer can

guarantee that all panels will be

free from pixel defects, but Philips

guarantees that any display 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 Display panel must exceed

these acceptable levels. For example,

no more than 0.0004% of the sub

pixels on a display 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

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 display

displays a dark pattern. There are the

types of bright dot defects.

One lit red, green or blue sub pixel.

pixel

Two adjacent lit sub pixels:

Red + Blue = Purple

Red + Green = Yellow

Green + Blue = Cyan (Light Blue)