New External Compensated Circuit to Achieve Uniform OLED Luminance for High-Resolution AMOLED Displays

Wei Sheng Liao, Po Syun Chen, Chia Ling Tsai, Chih Lung Lin

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

Abstract

This work proposes a simple-structure pixel circuit composed of low-temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs) and external threshold voltage (VTH) compensation circuit shared by whole row for active-matrix organic light-emitting diode (AMOLED) displays. This proposed circuit combines parallel addressing scheme and voltage-programming method to increase compensation time for accurately detecting threshold voltage variations of driving TFT, and the voltage drop (I-R drop) in power line. Simulation results show that the relative emission current error rates are below 2.93 % and 2.62 % when variations of VTH are ± 0.5 V and VDD I-R drop is ±0.5 V, respectively, verifying that the novel pixel design has great potential for use in high resolution AMOLED displays.

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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