New 2-D/3-D Switchable Pixel Circuit to Achieve Uniform OLED Luminance for High-Speed AMOLED Displays

Chih Lung Lin, Po Chun Lai, Po Cheng Lai, Po Syun Chen

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

This paper presents a new 2-D/3-D switchable pixel circuit based on low-temperature polycrystalline-silicon thin-film transistors (TFTs) at a frame rate of 240 Hz for active-matrix organic light-emitting diode (OLED) displays. The proposed circuit compensates for threshold voltage (VTH) variations of TFTs, VDD IR drops, and degradation of OLED luminance. To achieve highly uniform displays during high-speed operation, the circuit uses simultaneous emission in 3-D mode and parallel addressing in 2-D mode to ensure that the period of compensation is sufficiently long to detect each variation of normalized luminance. Simulation results verify that variations in the normalized luminance of the proposed circuit are all less than 4% when the VTH of the driving TFT varies by ±0.5 V, VDD drops by 1 V, and the VTH shift of the OLED increases from 0 to 0.9 V, simultaneously.

Original languageEnglish
Article number7484661
Pages (from-to)436-440
Number of pages5
JournalIEEE Journal of the Electron Devices Society
Volume4
Issue number6
DOIs
Publication statusPublished - 2016 Nov

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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