头戴显示器驱动和控制电路的研究

重庆大学硕士学位论文头戴显示器驱动和控制电路的研究姓名：张英华申请学位级别：硕士专业：控制理论与控制工程指导教师：陈东义20050401I(HeadMountedDisplay,HMD)(LiquidCrystalonSilicon,LCoS)HMDHMD60MITHMDHMD40LCoS1997LCoSLCoSLCoSLCoSHMDHMDHMDLCoSFPGA1)LCoSHMD2)3)LCoSHMDHMDLCoSLCoS5VCOMSHMDHMDLCoSIIIABSTRACTHeadMountedDisplay(HMD)isonekindoftypicalmicrodisplay,anditsapplicationprospectisverybroad.LiquidCrystalonSilicon(LCoS)isanewreflectivemicrodisplaywithmanyadvantages,suchasalargescreenhighbrightnesshighresolutionandlowpowerdissipationaswell.,anditisverysuitabletobeusedinmicrodisplaysystems,especiallyinHMD.PeoplebegantoresearchHMDfrom1960s.Manyuniversitiesoftheworldisconcentratingonresearchingitnow.AndtherearemorethanfortycompaniesthatproductandsaleHMD,andmostofthemareinAmerica,EuropeandJapan.AndtheresearchersonLCoSaremostlyAmericanandEnglishcompanies.Chip'sdesignandmakingandtheintegratingofopticalsystemareallrelatedintheLCoSchipsystem.TheresearchonLCoSdrivingcircuitandthedesignofcontrollingcircuitwillcontributetothedesignofmicrodisplaysystem,especiallytoHMD.Itwillcontributetothedesignofmicrodisplaychipwithourcountry'sknowledgeright.Theoverallintroductionofthedrivingandcontrollingcircuitisgivenfirst,thethoroughresearchandthepreliminarydesignofthedrivingcircuitandthecontrollingcircuitisseparatelyactuated.ThispaperdoesalotofresearchonHMD,LCoSandFPGA.1)thispaperintroducestheconceptandthehistoryofHMDandLCoS.Aswell,thebasicknowledgeofLCDisintroduced.ThenthedrivingandcontrollingcircuitofHMDbasedonLCoSisdescribedgenerally.2)AstherearesomedisadvantagesinthecommondrivingmethodofLCD,anewlowvoltagedrivingmethodisintroducedandchosen.Thestructureandworkingprincipleoflowvoltagedrivingcircuitisdescribedgenerally.Itscomponentsaredescribedindetailalso.3)Thedesignofdirvingcircuitisseperatedtwoparts.Oneofthemisthedesignofcircuitdiagram.TheotherpartisprogrammingFPGA.Following,thekeyquestionsinthedesignofthecontrollingcircuitarediscussed.Therequirementsofthecontrollingcircuitareanalyzed.Thenthispaperdesignsthestructureofthecircuitandmakesthechoiceofthepartsofanapparatus.Thehardwaresystem'sdesignisaccomplished.Atthesametime,thefunctionofFPGAprogrammingisanalyzed.BasedonthetheoryofIVmodularization,thewholesoftwaresystemisdividedintosomesub-modules.Aimingatthecoreofthecontrollingcircuit——therealizationofFSC,thedetailedandfeasiblemethodisgiven.Inconclusion,anewlowvoltagedrivingmethodisanalyzedandafeasiblecontrollingcircuitisdesigned.Now,theresearchonHMDisjustunderway.ThemethodofdrivingLCDinthelowvoltagewithcommonelectronicfieldinversionvoidsthepixelvoltage’sselfhoisteffectivelyandmakesthedrivingvoltageworkbelowtheCMOSstandardvoltage.Atthesametime,acontrollingcircuitincludinghardwareandFPGAprogrammingisdesigned.Thispaper'sworkmakesagreatmanypreparationsonthedesignofHMD,andcontributestotheproductionofLCoSchipofourowncountry.KeywordsHeadMountedDisplay,HMD,LCoS,Drivingandcontrollingcircuit,FieldSequentialColor,FSC11N.70%(VR)WearableComputerWearcomp(HeadMountedDisplay,HMD)(HelmetMountedDisplay,HMD)(ImageSource)(Melzer,Moffitt1997)1.1HMDFig1.1TheschematicofHMD’SdisplayHMDVGA1.1HMD2(NearEyeDisplay,NED)HMDHMD1.2abHMD()(a)(a)Monocular(b).(b)Binocular1.2HMDFig1.2TheappearanceofHMD(VGA)/CRTHMDHMD1.313(0.7)1.3HMDFig1.3ThebasicstructureandworkingflowofHMDHMDHMD601961PhilcoCRTHMD1965IvanSutherland1966UltimateDisplayHMD(headband)CRT1984NASAAmesLCDHMDLargeExpanse,ExtraPerspective,LEEP1989VPLHMDEyePhoneLCDLEEP1991HIT(VirtualRetinalDisplay,VRD)19942002MicroVisionHITVRD4(RetinalScanningDisplay,RSD)MIT()ColumbiaUniversityUSTHMDHMD40MicroOpticalKaiserLiteyeTekGearCAETrivisioKopinSony60HMDCRTHMDCRTHMD()(LiquidCrystalonSiliconLCoS)ActiveMatrixLiquidCrystalDisplayAMLCD(p-SiTFT)AMLCD(DigitalMirco-mirrorDeviceDMD)LCoS(OrganicLlightEmittingDiodeOLED)/(OrganicLlightEmittingDiodeonSiliconOLEDoS)(ActiveMatrixElectrolu-minescentAMEL)(VacuumFluorescentDisplayVFD)OLEDHMDLCoSeMaginOLEDOLEDLiteyeOLEDHMDLCoSHMDLCoSLCoSLCoSLCoSLCoS15HMDHMDLCoS(SpatialLightModulatorSLM)LCoSMicroLCD(CMOS-LCD)CMOSCMOS1.40.35nmTC0.7CMOSSRAM94%SRAMLCD2561.5LCoS1.4LCoSFig1.4ThestructureofLCoS1.5LCoSFig1.5AtypicalLCoSchip6LCoSTFT-AMLCDLCoSLCoSLCDLCoSLCoSLCDLCoS1.6(a)(b)LCoSITOITOLCoS1.6NMOSNMOSPN(a)(a)Themackupschematicofsectionplan(b)(b)Thestructureofsectionplan1.6LCoSFig1.6ThesectionplanofLCoSchip17LCoS1997SLMLCoSLCoS-SLM20702080DRAMNematicLiquidCrystalNLCTFT1983LCoS1616(SRAM)1.7NLCLCoS-SLMNLC1.7(a)19801616(b)Fig1.7Photographsshowing(a)a1616pixelsiliconbackplanefabricatedattheUniversityofEdinburghinearly1980s;(b)apatternofchessboarddisplayedbythespatiallightmodulatorbasedonthebackplane2080FerroelectricLiquidCrystalFLC(SSFLC)1989FLCLCoS-SLMFLCFLCoSFLCFLCDFLCFLCSXGA812801024FLCoSFLCLCoS1.81.8FLCLCoSFig1.8SchematicallyshowingthestructureofLCoSbasedonFLC;LCoSFablessThree-FiveAurora(S-Vision)BrillianMicroPixMicrodisplayMicrooptiacalcorpKopinDisplaytechSpatiaLightVaritronixLCoSLCoSASICOLED20(Electrolumi-nescence,EL)(OLED)19361987KodakOLEDOLEDOLEDOLED20OLEDDuPontDisplaysIBMOLED19OLEDOLEDITOOLED(OLEDonSilicon,OLEDoS)OLED1.91.9OLEDFig1.9AtypicalOLEDdisplayOLED(520