Designation:E1455−17StandardPracticeforObtainingColorimetricDatafromaVisualDisplayUnitUsingTristimulusColorimeters1ThisstandardisissuedunderthefixeddesignationE1455;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThispracticeprovidesdirectionsforcorrectingtheresultsobtainedwithtristimuluscolorimeterswhenmeasuringthetristimulusvaluesorchromaticitycoordinatesofcoloreddisplays.TristimuluscolorimetersapproximatetheCIEcolormatchingfunctionsx¯(λ),y¯(λ),z¯(λ)tomakethesemeasure-ments.Theerrorsgeneratedinmeasuringcolorsonadisplaymaybeminimizedusingthispractice.1.Scope1.1Thispracticeisintendedasanaidforimprovingtheaccuracyofcolorimetricmeasurementsmadewithtristimuluscolorimetersonvisualdisplayunits,suchascathoderaytubes(CRTs)andself-luminousflat-paneldisplays.Itexplainsausefulstepintheanalysisofcolorimetricdatathattakesadvantageofthefactthatlightfromsuchdisplaysconsistsofanadditivemixtureofthreeprimarycoloredlights.However,itisnotacompletespecificationofhowsuchmeasurementsshouldbemade.1.2Thispracticeislimitedtodisplaydevicesandcolori-metricinstrumentsthatmeetlinearitycriteriaasdefinedinthepractice.Itisnotconcernedwitheffectsthatmightcausemeasurementbiassuchastemporalorgeometricdifferencesbetweentheinstrumentbeingoptimizedandtheinstrumentusedforreference.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,healthandenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTec...
