IEC 62977-2-8 2025.docx

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1、IEC62977-2-8Edition1.02025-06INTERNATIONALSTANDARDElectronicdisplays-Part2-8:Measurementsofopticalcharacteristics-Reflectivedisplays(U)90%0eweN6e9Om-ICS31.120；31.260ISBN978-2-8327-0416-5THISPUBLICATIONISCOPYRIGHTPROTECTEDCopyright2025IEC,Geneva5SwitzerlandAllrightsreserved.Unlessotherwisespecified,n

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3、ghtstothispublication,pleasecontacttheaddressbeloworyourlocalIECmemberNationalCommitteeforfurtherinformation.IECSecretariatTel.:+412291902113,ruedeVarembeinfoiec.chwww.iec.chCH-1211Geneva20SwitzerlandAbouttheIECTheInternationalElectrotechnicalCommission(IEC)istheleadingglobalorganizationthatprepares

4、andpublishesInternationalStandardsforallelectrical,electronicandrelatedtechnologies.AboutIECpublicationsThetechnicalcontentofIECpublicationsiskeptunderconstantreviewbytheIEC.Pleasemakesurethatyouhavethelatestedition,acorrigendumoranamendmentmighthavebeenpublished.IECpublicationssearch-webstore.iec.c

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7、reelyallthepublicationspreviews,graphicalsymbolsandtheglossary.Withasubscriptionyouwillalwayshaveaccesstouptodatecontenttailoredtoyourneeds.Electropedia-www.electropedia.orgTheworldsleadingonlinedictionaryonelectrotechnology,containingmorethan22500terminologicalentriesinEnglishandFrench,withequivale

8、nttermsin25additionallanguages.AlsoknownastheInternationalElectrotechnicalVocabulary(IEV)online.Warning!Makesurethatyouobtainedthispublicationfromanauthorizeddistributor.CONTENTSFOREWORD5INTRODUCTION71 Scope92 Normativereferences93 Terms5definitions,abbreviatedtermsandsymbols93.1 Termsanddefinitions

9、93.2 Abbreviatedterms103.3 Symbols104 Specificationsofillumination124.1 General124.2 Standardilluminationspectra125 Lightmeasuringdevices(LMDs)135.1 General135.2 LMDconditions135.3 Effectsofreceiverinclination136 Arrangementsofilluminationsource,DUTandLMD146.1 General146.2 Coordinatesystemforviewing

10、directionandlightsourceposition146.3 Directionalillumination166.4 Ringlightillumination166.5 Conicalillumination176.6 Hemisphericaldiffuseillumination196.7 Specularillumination206.7.1 Smallandextendedaperturesources206.7.2 Variableaperturesource216.7.3 Annulusaperturesource237 Measuringmethods247.1

11、General247.2 Standardmeasuringenvironmentconditions247.3 Temporalstability247.4 Standardtestpatterns247.4.1 General247.4.2 Solidcolourpatterns247.4.3 Simpleboxset247.5 Standardlocationsofmeasurementfield257.6 Workingstandardsandreferences257.6.1 Diffusereflectancestandard257.6.2 Specularreflectances

12、tandard257.7 Reflectionmeasurementunderdefinedilluminationconditions267.7.1 General267.7.2 Measurementconditions267.7.3 Reflectancefactorunderhemisphericaldiffuseillumination287.7.4 Off-specularreflectancefactorunderdirectionalillumination297.7.5 Specularreflectanceunder川Uminationfromanannulusapertu

13、resource307.7.6 Hazereflectancefactorunderspecularreflectionilluminationfromavariableaperturesource337.8 Contrastratiounderspecifiedillumination347.8.1 General347.8.2 Contrastratiounderhemisphericaldiffuseillumination347.8.3 Contrastratiounderoff-speculardirectionalillumination357.8.4 Contrastratiou

14、nderambient川IIminatiOn367.9 Colourunderspecifiedillumination387.9.1 General387.9.2 Displaycolourunderhemisphericaldiffuseillumination397.9.3 Displaycolourunderoff-speculardirectionalillumination417.9.4 Displaycolourunderambientillumination427.9.5 CIELABcolourgamutvolume448 Variationsofviewingdirecti

15、on478.1 Purpose478.2 Viewingdirectionrange488.2.1 Measuringmethod488.2.2 Determinationmethods488.2.3 Specifiedconditions488.3 Viewingdirectionrangewithoutgrey-levelinversion498.3.1 Calculationmethod498.3.2 Determinationmethods498.3.3 Specifiedconditions49Annex A (informative)Generalremarkson川Uminationandmeasurementconditions50A.1General50A.2Illuminationandmeasurementconditions50A.3Front-