Customer Care And Warranty; Philips' Flat Panel Monitors Pixel Defect Policy - Philips A222C User Manual

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6. Customer care and warranty

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

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 LCD display 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.

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