Simplified Compensation Pixel Circuit Based on LTPS TFTs for High-Quality images of High-Resolution AMOLED Displays

Po Cheng Lai, Mao Hsun Cheng, Li Wei Shih, Chih Lung Lin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This work proposes a simplified pixel circuit that involves only four low-temperature polycrystalline silicon (LTPS) thin-film transistors (TFTs) and two capacitors especially for high-resolution active matrix organic light-emitting diode (AMOLED) displays. The proposed circuit adopts the simultaneous emission driving method to extend the compensating time for precisely sensing the threshold voltage variation of driving TFTs. Moreover, the flicker phenomenon is ameliorated by adjusting the voltage level of ELVSS during the programming period. Simulation results show that the relative current error rates under various data voltages with VTH variation of driving TFT of ± 0.5 V are all less than 4.5%, demonstrating that the proposed pixel circuit can generate uniform driving currents flowing through OLEDs for high-quality images.

Original languageEnglish
Title of host publicationAM-FPD 2019 - 26th International Workshop on Active-Matrix Flatpanel Displays and Devices
Subtitle of host publicationTFT Technologies and FPD Materials, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9784990875374
DOIs
Publication statusPublished - 2019 Jul
Event26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2019 - Kyoto, Japan
Duration: 2019 Jul 22019 Jul 5

Publication series

NameAM-FPD 2019 - 26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings

Conference

Conference26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2019
CountryJapan
CityKyoto
Period19-07-0219-07-05

All Science Journal Classification (ASJC) codes

  • Computer Graphics and Computer-Aided Design
  • Media Technology
  • Electronic, Optical and Magnetic Materials
  • Instrumentation

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  • Cite this

    Lai, P. C., Cheng, M. H., Shih, L. W., & Lin, C. L. (2019). Simplified Compensation Pixel Circuit Based on LTPS TFTs for High-Quality images of High-Resolution AMOLED Displays. In AM-FPD 2019 - 26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings [8830579] (AM-FPD 2019 - 26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.23919/AM-FPD.2019.8830579