BDL4271VL/00 User Manual

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BDL4271VL / BDL4671VL

6. Pixel Defect Policy

Westrivetodeliverthehighestqualityproductsandusesomeoftheindustry’smostadvancedmanufacturingprocesseswhilstpracticingstringentquality

control. However, pixel or sub-pixel defects on the PDP / TFT panels used in Plasma- & LCD- displays are sometimes unavoidable. No manufacturer can

guarantee that all panels will be free from pixel defects, but Philips guarantees that any Plasma- & LCD- displays with an unacceptable number of defects

will be repaired during the warranty period in line with your local guarantee conditions.

ThisnoticeexplainsthedifferenttypesofpixeldefectsanddenestheacceptabledefectlevelfortheLCDscreen.Inordertoqualifyforrepairunder

warranty,thenumberofpixeldefectsmustexceedacertainlevelasshowninthereferencetable.IftheLCDscreeniswithinspecicationawarranty

exchange / claim back will be refused. Additionally, because some types or combinations of pixel defects are more noticeable than others, Philips sets even

higherqualitystandardsforthose.

6.1. Pixels and Sub-Pixels

subpixel

pixel

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.

6.2. Types of Pixel Defects + Dot Definition

Pixel and sub-pixel defects appear on the screen in different ways. There are three categories of pixel defects and several types of sub-pixel defects within

each category.

Dot denition = What is a defective “Dot”? :

Oneormoredefective,adjacentsub-pixelaredenedasone“dot”.Theno.ofdefectivesub-pixelsarenotrelevanttodeneadefectivedot.Thismeans

that a defective dot can consist of one, two or three defective sub-pixels which can be dark or lit.

RR G B

One dot = One Pixel; consists of three sub-pixels of Red, Green, and Blue.

6.3. Bright Dot Defects

Bright dot defects appear as pixels or sub-pixels that are always lit or “on”. These are the examples 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)

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Philips BDL4271VL/00 V-Line Display

User Manual - Page 35