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8. 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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,wesetseven

higherqualitystandardsforthose.

8.1. 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.

8.2. 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.

8.3. 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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