A novel voltage-feedback pixel circuit for AMOLED displays

Chih Lung Lin, Tsung Ting Tsai, Yung Chih Chen

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

This study presents a novel voltage-modulated pixel circuit for active-matrix organic light-emitting diode (AMOLED) consisting of five n-type thin-film transistors (TFTs), one additional control signal, and one storage capacitor. The proposed circuit, which can be implemented in all-n-type and all-p-type low temperature poly-silicon (LTPS) TFT technologies, successfully compensates for threshold voltage deviation of TFTs and facilitates correction of OLED degradation using a voltage feedback method. Simulation and experimental results for all-n-type TFTs indicate that the proposed pixel circuit reduced the nonuniformity brightness problem effectively by compensating for threshold voltage variation in TFTs and reduced the degradation of emission efficiency in OLEDs.

Original languageEnglish
Article number4356475
Pages (from-to)54-60
Number of pages7
JournalIEEE/OSA Journal of Display Technology
Volume4
Issue number1
DOIs
Publication statusPublished - 2008 Mar

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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