Optical Engine Reference Design for DLP3010 …

1 1 DLPA079 August2017 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedOptical EngineReferenceDesignfor DLP3010 DigitalMicromirrorDevicePico,E2E are trademarksof a registeredtrademarkof August2017 OpticalEngineReferenceDesignfor DLP3010 DigitalMicromirrorDeviceZhongyanShengABS TRACTThis applicationnoteprovidesa referencedesignfor an designfeaturesTI s DLP3010digitalmicromirrordevice(DMD),whi chutilizesthe TI DLP TRPpixelarchitectureto deliverhighbrightnessand low opticalenginesare of of 1-W August2017 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedOptical EngineReferenceDesignfor DLP3010 DigitalMicromirrorDevice1 ScopeThis documentprovidesa briefoverviewof a referenceopticalenginedesignfor TI s key designparametersof the Pico technologywith DLP3010are well suitedfor integratinghigh qualitydisplaycapabilityinto ultra-compactproducts,suchas smartphones,tablets,and near-eyedisplays.

2 And portableapplicationssuchas mobilesmartTV and referencedesignis solelyintendedto assistdesignerswho are developingsystemsthat use performanceand resultslistedin thesedocumentsare basedon the designsimulationtool actualperformanceof the end productwill dependon the final followingTI documentscontainadditionalinformationreq uiredfor designof an opticalengineincorporatingthe DLP3010 Datasheet2. GeometricOpticsfor DLPA pplicationReport3. DLP3010 OpticalEngineDesignFiles3 DLP3010 Key ParametersTable1. DMDS pecificationFeaturesDescriptionTI part inch ( )diagonalAspectratio16:9 Arraysize (pixels)1280(h) 720 (v) mTilt angleof mirror17 (TRPpixelarchitecture) August2017 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedOptical EngineReferenceDesignfor DLP3010 DigitalMicromirrorDevice4 DesignConsiderationsThis sectiondescribesthe TI DLPpixelarchitecture,whichis a key factorwhenbeginningan designchoicesfor variouselementsof the opticalengineare also (Figure1) and tilts by 17.

3 The mirrorfirst tilts by 12 alongthe hingethenrolls by 12 to eitherON or OFFposition,resultingin a compound17 DMDto be designedfor side-illumination(illuminatingthe devicefromadirectionparallelto the long-axisof the device)or for bottom-illumination(illuminatingthe devicefromadirectionparallelto the short-axisof the device).EveryDMDis designedfor a specificilluminationdirection(sideor bottom),whichthendeterminesthe designof the thedatasheetfor eachspecificDMDto determinethe recommendedilluminationangleis 34 , regardlessof illuminationdirection,and the illuminationconeangleis within 17 .The f-numberfor the opticalsystemis limitedto to the flat ,whilebottomilluminationreducesthe size of the prismin atelecentricopticaldesignand also providesthe potentialfor lowercost by reducingthe size of August2017 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedOptical EngineReferenceDesignfor usedin an opticalengineincorporatingTI showspotentialdesignoptionsfor also highlightsthe choicesusedin this OpticalDesignOptionsNOTE:The highlightedboxeswith checksare optionschosenin this Design .

4 *TIR Totalinternalreflection**RTIR August2017 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedOptical EngineReferenceDesignfor summarizeskey attributesof this referencedesign:Table2. DesignSummarySpecificationDescriptionLig htsourceLEDO sramLE A Q8WP( mm)- AmberLE CG Q8WP( )- convertedgreenLE B Q8WP( mm)- BlueLEDcollectionangle80 DichroicThreeChannelTwo dichroicHomogenizerFly Eye Arrayf/# (ray tracingonly)R (full on/fulloff)Dependson final materialused,designimplementation,and August2017 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedOptical EngineReferenceDesignfor OpticalEngineTop ViewFigure5.

5 August2017 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedOptical EngineReferenceDesignfor DLP3010 DigitalMicromirrorDevice6 EstimatedBrightnessThis sectionshowsthe estimatedopticalefficiencyand brightnessbasedon dependon the materialusedand the efficiencyassumptionsfor opticalelementsusedin Table3 are representativeof componentsusedina typicalprojectionenginefor 's eye Ray (Lumens)(1)Sumof LEDcurrentx forwardvoltage duty cyclefor Brightnessat 1-W LEDP owerRedBlueGreenNotesLEDLE A Q8 WPLE B Q8 WPLE CG Q8 WPReferenceLEDdatasheetCurrent(mA)375375 375 LEDmanufacturer's datasheetForwardvoltage(V) 'sdatasheetLuminousflux4325150 Mid bin LEDs.

6 40 CjunctiontemperatureDutycycle30%20%50% (1) August2017 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedOptical EngineReferenceDesignfor DLP3010 DigitalMicromirrorDevice(1)Sumof LEDcurrent forwardvoltage duty cyclefor MaximumBrightnessRedBlueGreenNotesLEDLE A Q8 WPLE B Q8 WPLE CG Q8 WPReferenceLEDdatasheetCurrent(mA)600060 006000 Forwardvoltage(V) hightemperatureLuminousflux3332251676 Flux deratedfor hightemperature(90 C)Dutycycle30%20%50% (1)TotalLEDpower7 OpticalEngineSpecificationTable6 lists varyfromthis and will dependuponmaterialsusedand OpticalEngineSpecificationFeaturesDescri ptionMaximumbrightnessUp to 299 lumensat 20 wattsEfficiencyUp to 28 lumens/wattImagequality Contrastratio(full on/fulloff)Dependson opticalenginedesignand managementof stray,flat-stateand off-statelight insidethe Engine ModulationTransferFunction(MTF)50%at 93 lp/mm(designed) Uniformity>70%System Dimension(opticalsystemonly)Doesnot includemechanicalhousingand heatsink94 mm (L) 50 mm (W) 25 mm (H)

7 Offset100%Pleasedownload" DLP3010 OpticalEngineDesignFiles" projectionlens is designedfor high performanceand largetolerancesto be madeto example,the projectionlens couldbedesignedto havethe sameheightas the applicationslike near-eyedisplayswherea very smallformfactorand low powerconsumptionarecritical,brightnessof up to 10 lumensis designshownin this ApplicationReportcan furtherbe reducedin size by usinga devicecontainingred, greenand blue LEDsin a singlepackage,whicheliminatesthe needfor opticalcomponentplacementcouldbe matchedto theformfactorof the end product,for example,by unfoldingthe light pathand usingan additionalopticalelementto makean August2017 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedOptical EngineReferenceDesignfor DLP3010 DigitalMicromirrorDevice9 SummaryThe DLP3010 DMDenablesa highlyoptimizedand purposebuilt displaysolutionfor a widerangeofapplicationsincludingsmartpho nes,tablets,digitalcameras,mobileaccesso ries,interactivesurfacecomputing,digital signage.

8 Aftermarkethead-updisplaysand referencedesignshownin this ApplicationReportis targetedfor a compactprojectionenginewith up to 300 classof opticalenginesis best suitedfor a this basicopticalarchitectureare possiblefor applicationslike wearablesor StartedTo get startedwith DLPP icotechnology,we recommendthe followingactions: LearnmoreaboutDLPP icotechnology. Readthe GettingStartedwith TI DLP DisplayTechnologyapplicationreport. BrowseDLPproductsand applications. Experimentwith the DLPthrowratioand brightnesscalculator. DownloadTI Designsreferencedesignsto speedproductdevelopment,includingschemat ics,layoutfiles,bill of materials,and test reports.

9 Portable,Low PowerHD ProjectionDisplayusingDLPT echnology EvaluateDLPP icotechnologywith an easyto use evaluationmodule(EVM). Findopticalmodulesand designsupport. Buy productionreadymodulesfroma worldwideopticalsupplier. Contactopticalmodulemanufacturersto help accelerateproductdevelopmentand speedtime tomarket. ContactDLPdesignhousesfor customsolutions. ContactyourlocalTI salesrepresentativeor TI distributorrepresentative. Checkout TI's E2E communityto searchfor solutions,get help,shareknowledgeand solveproblemswith fellowengineersand TI ( TI ) technical,applicationor otherdesignadvice,servicesor information,including,but not limitedto,referencedesignsand materialsrelatingto evaluationmodules,(collectively, TI Resources ) are intendedto assistdesignerswho aredevelopingapplicationsthat incorporateTI products.

10 By downloading,accessingor usingany particularTI Resourcein any way,you(individuallyor, if you are actingon behalfof a company,yourcompany)agreeto use it solelyfor this purposeand subjectto the termsofthis s provisionof TI Resourcesdoesnot expandor otherwisealterTI s applicablepublishedwarrantiesor warrantydisclaimersfor TIproducts,and no additionalobligationsor liabilitiesarisefromTI providingsuchTI reservesthe rightto makecorrections,enhancements,improvement sand otherchangesto its TI understandand agreethat you remainresponsiblefor usingyourindependentanalysis,evaluationa nd judgmentin designingyourapplicationsand that you havefull and exclusiveresponsibilityto assurethe safetyof yourapplicationsand complianceof yourapplications(andof all TI productsusedin or for yourapplications)with all applicableregulations,lawsand ,with respectto yourapplications,you haveall the necessaryexpertiseto createand implementsafeguardsthat (1)anticipatedangerousconsequencesof failures,(2) monitorfailuresand theirconsequences,and (3)