{"title":"Pixel Circuit With Parallel Driving Scheme for Compensating Luminance Variation Based on a-IGZO TFT for AMOLED Displays","authors":"Chih-Lung Lin;Po-Chun Lai;Po-Cheng Lai;Po-Syun Chen;Wan-Lin Wu","doi":"10.1109/JDT.2016.2616507","DOIUrl":null,"url":null,"abstract":"This work proposes a new pixel structure based on amorphous indium-gallium-zinc-oxide thin-film transistors (a-IGZO TFTs) and a parallel addressing scheme for high-resolution active-matrix organic light-emitting diode (AMOLED) displays. The proposed circuit compensates for the nonuniformity of luminance that is caused by shifts in the threshold voltage (V\n<sub>TH</sub>\n) and mobility of driving TFTs. Measurement results verify that the parallel addressing scheme successfully extends the compensation time and accurately detects the V\n<sub>TH</sub>\n of the driving TFT. Moreover, the proposed circuit reduces the variations of OLED luminance from more than 83% to less than 13% when the V\n<sub>TH</sub>\n and mobility of driving TFT shifts by 1 V and 30%, respectively, and the V\n<sub>TH</sub>\n of OLED varies from 0 to 0.9 V.","PeriodicalId":15588,"journal":{"name":"Journal of Display Technology","volume":"12 12","pages":"1681-1687"},"PeriodicalIF":0.0000,"publicationDate":"2016-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/JDT.2016.2616507","citationCount":"17","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Display Technology","FirstCategoryId":"1085","ListUrlMain":"https://ieeexplore.ieee.org/document/7588170/","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q","JCRName":"Engineering","Score":null,"Total":0}
引用次数: 17
Abstract
This work proposes a new pixel structure based on amorphous indium-gallium-zinc-oxide thin-film transistors (a-IGZO TFTs) and a parallel addressing scheme for high-resolution active-matrix organic light-emitting diode (AMOLED) displays. The proposed circuit compensates for the nonuniformity of luminance that is caused by shifts in the threshold voltage (V
TH
) and mobility of driving TFTs. Measurement results verify that the parallel addressing scheme successfully extends the compensation time and accurately detects the V
TH
of the driving TFT. Moreover, the proposed circuit reduces the variations of OLED luminance from more than 83% to less than 13% when the V
TH
and mobility of driving TFT shifts by 1 V and 30%, respectively, and the V
TH
of OLED varies from 0 to 0.9 V.
期刊介绍：
This publication covers the theory, material, design, fabrication, manufacturing and application of information displays and aspects of display technology that emphasize the progress in device engineering, design and simulation, materials, electronics, physics, and reliability aspects of displays and the application of displays. The Journal is sponsored by EDS, seven other IEEE societies (BT, CES, CPMT, IA, IM, PHO and SSC) and the Optical Society of America (OSA).
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