FIELDEMISSIONDISPLAY场发射显示器

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1、(FED)FIELDEMISSIONDISPLAYDEEPAKGUPTAEC3rdYR.0800131034PLANOFPRESENTATIONWHATWHENAPPS.HOWADV.CHARACTERISTICSFEDFEDissuchadisplaythatworksabitlikeacathode-raytube,exceptthatelectronsareemissionprocedureInsteadofonecathodeemissionsprayingofelectronthroughnumberofh

2、oleisdoneHISTORYIn1968,CharlesA."Capp"SpindtattheStanfordResearchInstitutehadtheideaoffabricatingaflatdisplayusingmicroscopicmolybdenumconessinglyorinarrays(FEA’s)ThisdevelopmentwastheenablingtechnologytheconceptforusingFEA’sinamatrixaddresseddisplay(FED)Assembl

3、yofFEDDeviceFieldemissiondisplays,electronscomingfrommillionsoftinymicrotipspassthroughgatesandlightuppixelsonascreen.Thisprincipleissimilartothatofcathode-raytubesintelevisionsets.Thedifference:Insteadofjustone"gun"sprayingelectronsagainsttheinsideofthescreen

4、sface,thereareasmanyas500millionofthem.FEDPrinciplesCathodeThecathode/backplateisamatrixofrowandcolumntraces.Eachcrossoverlaysthefoundationforanaddressablecathodeemitters.Eachcrossoverhasupto4,500emitters,150nmindiameter.Thisemitterdensityassuresahighqualityimag

5、ethroughmanufacturingredundancy,andlong-lifethroughlowoperationalstress.EmissionEmittersgenerateelectronswhenasmallvoltageisappliedtobothrow(baselayer)andcolumn(toplayer).FEDPACKAGINGThefieldemissiondisplayscreensarecomprisedofathinsandwich.Inthisthebackisasheet

6、ofglassorsiliconthatcontainsmillionsoftinyfieldemitterswhichisthecathode.Thefrontisasheetofglasscoatedwithphosphordots,whichistheanode.FEDCHARACTERISTICSComparingwiththeCRTdisplaysthefieldemissiondisplayshasmanyadvantages.Theyare:Brightness2.Speed3.Compactandlig

7、htweight4.Displaysize5.Lowdrivingvoltage6.Widerviewingangle7.Highillumination8.ColourQualityFEDadvantagesInherentlyhighluminousefficiencyNoResponseTimeissuesCRT-likeColourGamutLowerPowerConsumptionColdCathodeEmissionDistancebetweencathodeandscreen~0.2–5mmFlatPan

8、elTechnologyMatrixAddressed–NoDYCapitalinvestmentformanufacturingVLSTVwithprintableCNTFEDs-1/10thofLCDCostadvantageoverLCDcouldbe40%TechnologyLuminousEfficiency(Lm/W)