IEC 62341-6-2-2015 有机发光二极管(OLED)显示器.第6-2部分视觉质量和环境性能的测量方法

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INTERNATIONALSTANDARD

IEC62341-6-2

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Organiclightemittingdiode(OLED)displays-

Part6-2:Measuringmethodsofvisualqualityandambientperformance

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IEC62341-6-2

Edition2.02015-12

INTERNATIONAL

STANDARD

colour

inside

Organiclightemittingdiode(OLED)displays-

Part6-2:Measuringmethodsofvisualqualityandambientperformance

INTERNATIONAL

ELECTROTECHNICAL

COMMISSION

ICS31.260

ISBN978-2-8322-3026-8

Warning!Makesurethatyouobtainedthispublicationfromanauthorizeddistributor.

RegsteredtrademarkoftheIhtemationalBectrotechnicalCommission

—2—IEC62341-6-2:2015IEC2015

CONTENTS

FOREWORD

5

1Scope

7

2Normativereferences

7

3Terms,definitionsandabbreviations

7

3.1Termsanddefinitions

7

3.2Abbreviations

10

4Structureofmeasuringequipment

10

5Standardmeasuringconditions

10

5.1Standardmeasuringenvironmentalconditions

10

5.2Standardlightingconditions

10

5.2.1Dark-roomconditions

10

5.2.2Ambientilluminationconditions

11

5.3Standardsetupconditions

16

5.3.1General

16

5.3.2AdjustmentofOLEDdisplaymodules

16

5.3.3Startingconditionsofmeasurements

16

5.3.4Conditionsofmeasuringequipment

16

6Visualinspectionofstaticimages

17

6.1General

17

6.2Classificationofvisibledefects

17

6.2.1General

17

6.2.2Referenceexamplesforsubpixeldefects

17

6.2.3Referenceexampleforlinedefects

19

6.2.4Referenceexampleformuradefects

19

6.3Visualinspectionmethodandcriteria

20

6.3.1Standardinspectionconditions

20

6.3.2Standardinspectionmethod

21

6.3.3Inspectioncriteria

23

7Electro-opticalmeasuringmethodsunderambientillumination

24

7.1Reflectionmeasurements

24

7.1.1Purpose

24

7.1.2Measuringconditions

24

7.1.3Measuringthehemisphericaldiffusereflectance

25

7.1.4Measuringthereflectancefactorforadirectionallightsource

26

7.2Ambientcontrastratio

28

7.2.1Purpose

28

7.2.2Measuringconditions

28

7.2.3Measuringmethod

28

7.3Displaydaylightcolour

29

7.3.1Purpose

29

7.3.2Measuringconditions

29

7.3.3Measuringmethod

29

7.4Daylightcolourgamutvolume

30

7.4.1Purpose

30

7.4.2Measuringconditions

30

7.4.3Measuringmethod

31

IEC62341-6-2:2015◎IEC2015—3—

7.4.4Reporting

32

AnnexA(informative)Measuringrelativephotoluminescencecontributionfrom

displays

34

A.1Purpose

34

A.2Measuringconditions

34

A.3Measuringthebi-spectralphotoluminescenceofthedisplay

34

A.4DeterminingtherelativePLcontributionfromthedisplay

34

AnnexB(informative)Diagnosticforobservingdisplayluminancedependencefrom

ambientillumination

37

B.1Purpose

37

B.2Measuringmethod

37

AnnexC(informative)Calculationmethodofdaylightcolourgamutvolume

38

C.1Purpose

38

C.2Procedureforcalculatingthecolourgamutvolume

38

C.3SurfacesubdivisionmethodforCIELABgamutvolumecalculation

40

C.3.1Purpose

40

C.3.2Assumptions

40

C.3.3Algorithm

40

C.3.4Softwareexampleexecution

40

Bibliography

46

Figure1-Exampleofvisualinspectionroomsetupforcontrolofambientroomlighting

andreflections

11

Figure2-Exampleofmeasurementgeometriesforauniformhemisphericaldiffuse

illuminationconditionusinganintegratingsphereandsamplingsphere

13

Figure3-Directionalsourcemeasurementgeometryusinganisolatedsource

15

Figure4-Directionalsourcemeasurementgeometryusingaringlightsource

15

Figure5-Layoutdiagramofmeasurementsetup

16

Figure6-Classificationofvisibledefects

17

Figure7-Brightsubpixeldefects

18

Figure8-Criteriaforclassifyingbrightanddarksubpixeldefects

19

Figure9-Brightanddarklinedefects

19

Figure10-Sampleimageoflinemura

20

Figure11-Exampleofspotmura

20

Figure12-Setupconditionforvisualinspectionofelectro-opticalvisualdefects

22

Figure13-Shapeofscratchanddentdefect

24

Figure14-Exampleofrangeincoloursproducedbyagivendisplayasrepresented

bytheCIELABcolourspace

32

FigureA.1-Scaledbi-spectralphotoluminescenceresponsefromadisplay

35

FigureA.2-Decomposedbi-spectralphotoluminescenceresponsefromadisplay

35

FigureB.1-Exampleofdisplayluminancereductioncausedbythehighilluminance

fromahighintensityLEDflashlightdirectedatthedisplaysurface

37

FigureC.1-Analysisflowchartforcalculatingthecolourgamutvolume

38

FigureC.2-GraphicalrepresentationofthecolourgamutvolumeforsRGBinthe

CIELABcolourspace

39

Table1-Definitionsfortypesofscratchanddentdefects

24

4IEC62341-6-2:2015◎IEC2015

Table2-EigenvaluesM,andM₂forCIEdaylightIlluminantsD50andD75

26

Table3-Exampleofminimumcoloursrequiredforgamutvolumecalculationofa3-

primary8-bitdisplay

31

Table4-Measuredtristimulusvaluesfortheminimumsetofcolours(seeTable

3)

requiredforgamutvolumecalculationunderthespecifiedambientillumination

condition

33

Table5-Calculatedwhitepointinthedarkenedroomanddaylightambientcondition

33

Table6-ColourgamutvolumeintheCIELABcolourspace

33

TableC.1-TristimulusvaluesofthesRGBprimarycolours

39

TableC.2-ExampleofsRGBcoloursetrepresentedintheCIELABcolourspace

39

TableC.3-ExampleofsRGBcolourgamutvolumeintheCIELABcolourspace

40

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IEC62341-6-2:2015IEC2015—5—

INTERNATIONALELECTROTECHNICALCOMMISSION

ORGANICLIGHTEMITTINGDIODE(OLED)DISPLAYS-

Part6-2:Measuringmethodsofvisualqualityandambientperformance

FOREWORD

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InternationalStandardIEC62341-6-2hasbeenpreparedbyIECtechnicalcommittee110:Electronicdisplaydevices.

Thissecondeditioncancelsandreplacesthefirsteditionpublishedin2012.Thiseditionconstitutesatechnicalrevision.

Thiseditionincludesthefollowingsignificanttechnicalchangeswithrespecttothepreviousedition:

a)Contentsof7.4arechanged.

b)ContentsanditemsofAnnexCarechanged.

c)AnnexBisadded.

—6—IEC62341-6-2:2015◎IEC2015

Thetextofthisstandardisbasedonthefollowingdocuments:

FDIS

Reportonvoting

110/695/FDIS

110/718/RVD

Fullinformationonthevotingfortheapprovalofthisstandardcanbefoundinthereportonvotingindicatedintheabovetable.

AlistofallpartsoftheIEC62341series,publishedunderthegeneraltitleOrganiclight

emittingdiode(OLED)displays,canbefoundontheIECwebsite.

ThispublicationhasbeendraftedinaccordancewiththeISO/IECDirectives,Part2.

ThecommitteehasdecidedthatthecontentsofthispublicationwillremainunchangeduntilthestabilitydateindicatedontheIECwebsiteunder"

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"inthedatarelatedtothespecificpublication.Atthisdate,thepublicationwillbe

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IMPORTANT-The'colourinside'logoonthecoverpageofthispublicationindicates

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IEC62341-6-2:2015◎IEC2015—7—

ORGANIC

Part6-2:Measuring

LIGHTEMITTINGDIODE(OLED)DISPLAYS-

methodsofvisualqualityandambientperformance

1Scope

ThispartofIEC62341specifiesthestandardmeasurementconditionsandmeasurementmethodsfordeterminingthevisualqualityandambientperformanceoforganiclightemittingdiode(OLED)displaymodulesandpanels.Thisdocumentmainlyappliestocoiourdisplaymodules.

2Normativereferences

Thefollowingdocuments,inwholeorinpart,arenormativelyreferencedinthisdocumentandareindispensableforitsapplication.Fordatedreferences,onlytheeditioncitedapplies.Forundated'references,thelatesteditionofthereferenceddocument(includinganyamendments)applies.

IEC60050(allparts),

)

InternationalElectrotechnicalVocabulary(availableat

IEC61966-2-1,Multimediasystemsandequipment-Colourmeasurementandmanagement

-Part2-1:Colourmanagement-DefaultRGBcolourspace-sRGB

IEC62341-1-2,Organiclightemittingdiode(OLED)displays-Part1-2:Terminologyand

lettersymbols

CIE15:2004,Colorimetry

3Terms,definitionsandabbreviations

3.1Termsanddefinitions

Forthepurposesofthisdocument,thetermsanddefinitionsgiveninIEC60050-845and

IEC62341-1-2,aswellasthefollowingapply.

3.1.1

visualinspection

meansforcheckingimagequalitybyhumanvisualobservationforclassificationandcomparisonagainstlimitsamplecriteria

3.1.2

itfcglesubpixel,theminimumcolourelement,whichisvisiblybrighterordarker

thansurroundingsubpixelsofthesamecolour.

Note1toentry:Furtherclassificationsofsubpixeldefectsaremadedependingonthenumberandconfigurationofmultiplesubpixeldefectswithinaregionofthedisplay.

Note2toentry:Formonochromaticdisplays,theterm"dotdefect"maybeused.

—8—IEC62341-6-2:2015IEC2015

3.1.3

brightsubpixeldefects

defectsinsubpixelsordotswhicharevisiblybrighterthansurroundingsubpixelsofthesamecolourwhenaddressedwithauniformdarkorgreybackground

3.1.4

darksubpixeldefects

defectsinsubpixelsordotswhicharevisiblydarkerthansurroundingsubpixelsofthesamecolourwhenaddressedwithauniformbrightbackground(e.g.>50%fullscreenluminance)

3.1.5

besdotswithpartoftheemissionareaobscuredsuchthatavisible

differenceinbrightnessisobservedincomparisonwithneighboringsubpixelsofthesamecolour

3.1.6

clusteredsubpixeldefects

subpixelordotdefectsgatheredinaspecifiedareaorwithinaspecifieddistance

Note1toentry:Thisisalsoknownas"closesubpixeldefect".

3.1.7

unstablesubpixel

subpixelordotthatchangesluminanceinanuncontrollableway

3.1.8

pixelshrinkage

reductionintheactiveemissiveareaofoneormoresubpixels(ordots)overtime

3.1.9

paneledgeshrinkage

reductionintheactiveemissiveareafromtheedgesofthedisplayareaovertime

3.1.10

linedefects

defectsinaverticalorhorizontalbrightordarklineparalleltoaroworcolumnobservedagainstadarkorbrightbackground,respectively

3.1.11

brightlinedefects

defectsinlinesappearingbrightwhendisplayedwithauniformdarkorgreypattern

3.1.12

darklinedefects

defectsinlinesappearingdarkwhendisplayedwithauniformbrightorgreypattern

3.1.13

mura

visibledefectsinregionsinwhichtheluminanceandcolournon-uniformitygenerallyvarymoregraduallythansubpixelleveldefects

height.

Note1toentry:Forclassification,themaximumdimensionshouldbelessthanonefourthofthedisplaywidthor

3.1.14

linemura

variationinluminanceconsistingofoneormorelinesextendinghorizontallyorverticallyacrossalloraportionofthedisplay

IEC62341-6-2:2015◎IEC2015—9—

3.1.15

colourmura

murathatappearsprimarilyinonlyonecolourchannelandresultsinalocalvariationofthe

whitepoint(orCCT)

3.1.16

spotmura

visibledefectsinregionsinwhichtheluminancevariationislargerthanasinglepixel,andwhichappearasalocalizedslightlydarkerorbrighterregionwithasmoothlyvaryingedge

3.1.17

mechanicaldefects

imageartefactsarisingfromdefectsinprotectiveandcontrastenhancementfilms,coatings,

mechanicalfixturing,orotherelementswithintheactiveareaofthedisplay

3.1.18

scratchdefect

defectappearingasfinesingleormultiplelinesorscratches,generallylightinappearanceonadarkbackground,andindependentofthedisplaystate

3.1.19

dentdefect

localizedspotgenerallywhiteorgreyinappearanceondarkbackgroundandindependentofthedisplaystate

3.1.20

foreignmaterial

defectcausedbyaforeignmateriallikedustorthreadinbetweenthecontrastenhancement

films,protectivefilms,oronanemittingsurfacewithintheactiveareaofthedisplay

3.1.21

bubble

defectcausedbyacavityinorbetweensealingmaterials,adhesives,contrastenhancementfilms,protectivefilms,oranyotherfilmswithintheactiveareaofthedisplay

3.1.22

ambientcontrastratio

contrastratioofadisplaywithexternalnaturalorartificialilluminationincidentontoitssurfaceandwhichincludesindoorilluminationfromluminaires,oroutdoordaylightillumination

3.1.23

colourgamutboundary

surfacedeterminedbyacolourgamut'sextremes

3.1.24

colourgamutvolume

singlenumberforcharacterizingthecolourresponseofadisplaydeviceinathree-dimensionalcolourspace

Note1toentry:TypicallythecolourgamutvolumeiscalculatedintheCIELABcolourspace.

3.1.25

ambientcolourgamutvolume

singlenumberforcharacterizingthecolourresponseofadisplaydevice,underadefinedambientilluminationcondition,inathree-dimensionalcolourspace

Note1toentry:TypicallythecolourgamutvolumeiscalculatedintheCIELABcolourspace.

—10—IEC62341-6-2:2015◎IEC2015

3.2Abbreviations

Forthepurposesofthisdocument,thefollowingabbreviationsapply.

CCT

CIE

CIELAB

DUT

HD

ISO

LED

LMD

LTPS

OLED

PL

QVGA

RGB

SDCM

SRGB

TFT

TV

UV

correlatedcolourtemperature

I'Eclairage(InternationalCommissionon

CommissionInternationalede

Ilumination)

CIE1976(L*a*b*)colourspace

deviceundertest

highdefinition

InternationalOrganizationforStandardization

lightemittingdiode

lightmeasuringdevice

lowtemperaturepolysilicon

organiclightemittingdiode

photoluminescence

quartervideographicsarray

red,green,blue

standarddeviationofcolourmatching

standardRGBcolourspaceasdefinedinIEC61966-2-1

thinfilmtransistor

television

ultraviolet

4Structureofmeasuringequipment

Thesystemdiagramsand/oroperatingconditionsofthemeasuringequipmentshallcomplywiththestructurespecifiedineachitem.

5Standardmeasuringconditions

5.1Standardmeasuringenvironmentalconditions

Electro-opticalmeasurementsandvisualinspectionshallbecarriedoutunderthestandardenvironmentalconditions,atatemperatureof25℃±3℃,arelativehumidityof25%to85%,andapressureof86kPato106kPa.Whendifferentenvironmentalconditionsareused,theyshallbenotedinthevisualinspectionorambientperformancereport.

5.2Standardlightingconditions

5.2.1Dark-roomconditions

Theluminancecontributionfromthebackgroundilluminationreflectedoffthetestdisplayshallbe≤0,01cd/m²orlessthan1/20thedisplay'sblackstateluminance,whicheverislower.Iftheseconditionsarenotsatisfied,thenbackgroundsubtractionisrequiredanditshallbenotedintheambientperformancereport.Inaddition,ifthesensitivityoftheLMDisinadequatetomeasureattheselowlevels,thenthelowerlimitoftheLMDshallbenotedintheambientperformancereport.

Unlessstatedotherwise,thestandardlightingconditionsshallbethedark-roomconditions.

IEC62341-6-2:2015IEC2015—11—

5.2.2Ambientilluminationconditions

Ambientilluminationconditionsforvisualinspection

Ambientilluminationconditionshaveastrongimpactontheabilityoftheinspectortoresolvedefects,andlargevariationsoflightintensityinthevisualfieldcanleadtoinspectorfatigueandaresultinglossofsensitivitytodefects.RefertoISO9241-310forgeneralguidanceonoptimalilluminationconditionsforvisualinspectionofpixeldefects.[1]1

Forinspectorcomfortandconsistencyofinspectionconditions,anaverageambientilluminanceofbetween50Ixand150ixissuggestedintheinspector'sworkarea.Thisambientilluminancemaybemeasured,forexample,withanilluminancemeterfacingdirectlyupwardinahorizontalplaneattheapproximateeyeleveloftheinspector.Careshallbetakentousediffuseilluminationanddiffusetexturesintheinspectionenvironment,toavoidglareinthevisualfieldoftheinspector.AnexampleofthemeasurementgeometryisshowninFigure1.

Thedisplayundertestshallbeplacedtoavoiddirectilluminationfromambientroomlightsources.Inaddition,darklight-absorbingmaterialsshallbeusedtocoverspecularsurfacesthatmaybeviewedbytheinspectorindirectreflectionfromthedisplaysurface.Inanycase,tolimitdegradationofthedisplaycontrastfromambientlight,theambientilluminanceincidentfromroomlightsourcesonthedisplaysurfacemeasuredwiththedisplayoffshallbe<20Ix.Ifambientilluminanceatthedisplaysurfaceis>20Ix,itshallbenotedinthevisualinspectionreport.

Nodirectional

sources

Dark,light-

Wallsorroom

furnishings

Displaydevice

Baflle

Lishield

Nodirectionalsources

Diffuselightsource

absorbingmaterial

Inspector

IEC

Figure1-Exampleofvisualinspectionroomsetup

forcontrolofambientroomlightingandreflections

Ambientilluminationconditionsforelectro-opticalmeasurements

Thefollowingilluminationconditionsareprescribedforelectro-opticalmeasurementsofdisplaysinambientindoororoutdoorilluminationconditions.Ambientindoorroomilluminationandoutdoorilluminationofclearskydaylight,onadisplayshallbeapproximatedbythecombinationoftwoilluminationgeometries.[2]Uniformhemisphericaldiffuseilluminationwillbeusedtosimulatethebackgroundlightinginaroom,orthehemisphericalskylightincidentonthedisplay,withsunoccluded.Adirectedsourceinadarkroomwillsimulatetheeffectofdirectionalilluminationonadisplaybyaluminaireinaroom,orfromdirectsunlight

Somedisplayscanemitphotoluminescence(PL)whenexposedtocertainlight.TherelativeimpactofPLonthereflectionmeasurementcanbedetermined,andisdescribedinAnnexA.AnilluminationconditionthatcausesasignificantreflectionmeasurementerrorduetothepresenceofPLshouldbetreatedcarefully.Ifthesameilluminationspectraldistributionand

NumbersinsquarebracketsrefertotheBibliography.

—12—IEC62341-6-2:2015IEC2015

illumination/detectiongeometryisusedforthereflectionmeasurementsandthecalculationofambientcontrastratioandcolour,thenthePLcanbeincorporatedintothereflectioncoefficients.However,iftheilluminationspectrumusedinthecalculationsissignificantlydifferent,thenthereflectedcomponentshallbemeasuredseparatelyfromthePLcomponent.Thelattercaseisnotaddressedinthisdocument.

Itshould