Manual Philips BDL4645E (page 31 of 39) (English)

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BDL3245E / BDL4245E / BDL4645E

6. 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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thisLCDscreen.Inordertoqualifyforrepairunder

warranty,thenumberofpixeldefectsmustexceedacertainlevelwhichisgiven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 BDL4645E Manual

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