DisplayPort技术概述

DisplayPort®TechnicalOverviewDisplayPort®TechnicalOverviewDisplayPortTechnicalOverviewMay2010DisplayPortTechnicalOverviewMay2010OutlineVESAOverviewWhyDisplayPortandwhatmakesitdifferentComparisontoDVIandHDMIComparisontoDVIandHDMIDisplayPort1.2FeaturesAdoptionTrendspRelatedStandardsEmbeddedDisplayPortStandard(eDP™)DirectDriveMonitorStandardllddInternalDisplayPortStandard(iDP™)ANSI/CEA-2017-AFurtherVESADevelopmentsVESAforDisplayStandardsAnopen,accessibleforumforindustry-widedisplaystandardsMorethan150activemembercompaniesworldwidepActiveparticipationfrommorethan800industryexpertsacross10technicaltaskgroupsVESAmembercompaniesareresponsibleworldwidefor:95%ofPCgraphicssilicon90%ofPCmonitorsilicon95%ofPCmonitorLCDpanelsp95%ofPCnotebookLCDpanelsVESAhasactiveliaisonswithotherindustrystandardgroups:ConsumerElectronicsAssociation(CEA)ConsumerElectronicsAssociation(CEA)Blu-RayDiscAssociation(BDA)VESAStandardsDrive&EnableProductsVESAMemberCompanyExamplesAavaraGenesysLogicITEOriseTechCircuitAssemblyVESAMemberCompanyExamples(continued)EXTRONPTWOEXTRONSURE-FIREFreeportP-TWOSIMULATECHNOLOGYSUREFIREElexaZIPSPCXTECJenvingAmphenol/AssembletechSVESARepresentstheDisplayEco-systemMembershipbyCategory15%15%5%6%4%5%2%2%36%3%3%7%VESAMembershipbyCompanyRegionCompanyHeadquarters41%5353%6%VESAMembershipbyCompanySizeAnnualSalesRevenue$1M$1-5M11%8%$5-50M$50M26%59%%VESAMembershipbyCompanyTypePrimaryProducts15%15%5%6%4%5%35%5%2%3%3%7%VESAStandardsareKeytoPCsandDisplaysNotebookLCDsandPCMonitorLCDsaccountfor~72%ofoverallLCDproduction1H09WWDisplayUnitMix-32%-40%-40%-28%:DisplaySearchPanelTrack–August2009AnewcommondigitaldisplayinterfaceisneededtoreplaceVGAAnalogVGAsignallimitsdisplayperformanceAnalogVGAsignallimitsdisplayperformanceAnalogVGAcannotoffercontentrightsmanagementAnalogVGAoutputaddsanincreasingburdentochipintegrationduetothehighvoltageinterfacerequirementWhynotDVIorHDMI?InsufficientinterfaceflexibilityforbackwardsupportandfeatureexpansionNotoptimalassharedembedded/externaldisplayinterfaceMorecomplextointegrateduetointerfacevoltageandpixelclockrequirementsDisplayPortisaroyal-freestandarddevelopedwithinanopenstandardsprocessWhydoweneedadedicateddisplayinterface?Foruncompresseddisplayinformation,acontinuoushigh-bandwidthdatalinkisneededtothedisplay.AdedicateddatapathfromtheGPUisneeded,andnotsharedsystemresource.Thedatapathmustbecontinuesandnotdelayedbyothersysteminterrupts.yyypInterfacessuchasUSB,SATAand1394donotmeettherequirementsforadisplayinterface.DisplayPortPlatformsAll-in-OneDesktopPerformanceSimplerInteroperableVGA/DVIReplacementFormFactorImprovementRichColorDepthLVDSReplacementPihlMbilDisplayPortPeripheralsMobileExtendedBatteryLifeSleekerDesignsVGAReplacementDigitalInterfaceEnhancedDisplayLVDSReplacementEnhancedDisplayExperienceDilPtithUilPCDilCtDisplayPortistheUniversalPCDisplayConnectorPrimaryFeaturesoftheDisplayPortInterfaceWorkingwithinVESA,thePCindustrydevelopedtheDisplayPortstandardwhichprovidesthefollowing:Asingle,flexible,digitalA/VinterfacetoreplacemultipleexistingvideointerfacetypesLegacydisplaysandHDMIaresupportedthroughvideoadaptersLegacydisplaysandHDMIaresupportedthroughvideoadaptersImportantasPCusersmovetonotebooksandotherportabledeviceswithlimitedreceptaclespaceAdaptabletointernalandexternaldisplayapplicationsppyppEnablesre-useofSourceICvideoports(reducespincountandcircuitry)andinsomecasesdisplaypanels(samepanelformonitororembedded)ExtensibletoaccommodatefutureneedsandcapabilitiespIntegrateseasilyintosub-micronchips,enablingwidespreadadoptionHowisDisplayPortdifferentfromHDMI/DVI?HDMIandDVIDisplayPortVideoDataStructureBasedonSynchronousPixelInterfaceSynchronousdisplaytimingadoptedfromanalogvideostandardsDigitizedcomponentvideosentatdisplaypixelrateBasedonhigh-speedserialcommunicationsprotocolMicro-packetdatastructure8B/10Bencodingwithembeddedclock,fixedrates(1.6,2.7or5.4Gbps)dependingonbandwidthrequirementsDigitizedcomponentvideosentatdisplaypixelrate(3datapairs)Separatereferencepixelclock,variablerateNomemoryindisplayrequiredInterfaceisfixedat4highspeeddatadifferentialor5.4Gbps)dependingonbandwidthrequirements1,2,or4differentialpairs,dependingonbandwidthrequirementsInterfaceisfixedat4highspeeddatadifferentialpairs(foranyapplicationorresolution)RedGreenLane1Lane2I2C/CEC*GreenBlueClockAux.Channel*Lane2Lane3Lane4AdvantagesoftheHigh-SpeedSerialCommunicationsProtocolPacket-baseddatastructureexpandsflexibilityAllowsthetransportofmultipledatatypesandmultiplestreamsAllowstheadditionofnewdatatypesandadditionaldatastreamsasllowsteaddtooewdatatypesadaddtoaldatasteasasneedschangeDisplayPortisbasedona“Micro-Packet”ArchitectureEachbyteislimitedto64bytesperlaneinsizeThislimitsthe