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1、有源矩阵有机电致发光像素电路的研究进展版权和著作权归原作者所右,如存不愿意被转载的情况,己有源驱动方式的有机发光二极管(AMOLED)较之无源驱动方式易于实现高亮度和高分辨率、功耗更小,更适合大屏幕显示。但传统的两管驱动电路会出现驱动管阈值电压在整个屏幕上分布不均匀,或长时间加偏压后驱动管的阈值电压发生漂移。本文在两管驱动电路的基础上介绍了几种最近提出的补偿电路并描述了它们的改善效果及各自存在的问题。关键词:有机电致发光二极管;有源矩阵;阈值电压漂移;像素电路TN873.3:TN321.5AProgressoftheResearch
2、onPixelCircuitsinActive-matrixOrganiclight-emittingDiodeXUXiao-mingl,2,ZHUWen-qing*,1,2ZHANGHao2,ZHANGZhi-linl,2,JIANGXue-yinl,2(1.CollegeofMaterialScienceandEngineering,ShanghaiUniversity,Shanghai200072,有源矩阵有机电致发光像素电路的研究进展版权和著作权归原作者所右,如存不愿意被转载的情况,己有源驱动方式的有机发光二极管(AMOLE
3、D)较之无源驱动方式易于实现高亮度和高分辨率、功耗更小,更适合大屏幕显示。但传统的两管驱动电路会出现驱动管阈值电压在整个屏幕上分布不均匀,或长时间加偏压后驱动管的阈值电压发生漂移。本文在两管驱动电路的基础上介绍了几种最近提出的补偿电路并描述了它们的改善效果及各自存在的问题。关键词:有机电致发光二极管;有源矩阵;阈值电压漂移;像素电路TN873.3:TN321.5AProgressoftheResearchonPixelCircuitsinActive-matrixOrganiclight-emittingDiodeXUXiao-mi
4、ngl,2,ZHUWen-qing*,1,2ZHANGHao2,ZHANGZhi-linl,2,JIANGXue-yinl,2(1.CollegeofMaterialScienceandEngineering,ShanghaiUniversity,Shanghai200072,China,2.KeyLaboratoryofAdvancedDisplayandSystemApplications,MinistryofEducation,Shanghai200072,China)Abstract:Becomparedwithpassiv
5、ematrix,Activematrixorganiclightemittingdiode(AMOLED)iseasiertoachieveadvantagessuchashighbrightness,highresolutionandlowpowerconsumption,soitismoresuitableforlargescreendisplay.ButthesimplestpixelcircuitforAMOLEDdisplayswhichconsistsoftwothin-filmtransistors(TFTs)canf
6、aceseveralproblems.Forexample,thethresholdvoltageofthedrivingTFTwillbeununiformoverthewholescreenortheoutputcurrentissensitivetothresholdvoltageshiftofthedrivingTFT.Inthispaper,somerecentproposedcompensationpixelcircuitsbasedonthetwo-TFTpixelcircuitareintroduced.Aswell
7、astheirimprovements,problemsofeachschemearedescribed.Keywords:OLED:activematrix:thresholdvoltageshift:pixelcircuit引言有机发光二极管(organiclight-emittingdiode,0LED)具有诸如高亮度、高对比度、超轻超薄、宽视角、响应快、低功耗、低成本、全固态等独特的优势。因此在平板显示产业中受到丫广泛的关注,被认为是最存可能取代LCD的显示器件[1]。其驱动电路与LCD—样,有无源驱动OLED(passiv
8、ematrixOLED,PMOLED)和有源驱动OLED(activematrixOLED,AMOLED)两类。PMOLED显示屏构造简单、生产成本低,但功耗大、显示效率低。AMOLED显示屏是在简单矩阵结构的基础上,为每个OLE:D