A three-transistor pixel circuit to compensate for threshold voltage variations of LTPS TFTs for AMOLED displays

Chih Lung Lin, Po Syun Chen, Mao Hsun Cheng, Yen Ting Liu, Fu Hsing Chen

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

This work presents a new pixel circuit adopting low-temperature polycrystalline-silicon thin-film transistors (LTPS TFTs) for active-matrix organic light-emitting diode (AMOLED) displays. The proposed pixel circuit can compensate for the threshold voltage variations of the LTPS TFTs with a simple structure. Simulated results demonstrate that the OLED currents over the entire data voltage range are uniform for 0.5 V variations in the threshold voltage of the driving TFT, unlike in a conventional circuit. Furthermore, the relative current error rates for parasitic loads in the 1280 ×720 resolution AMOLED display are less than 6%.

Original languageEnglish
Article number6990482
Pages (from-to)146-148
Number of pages3
JournalIEEE/OSA Journal of Display Technology
Volume11
Issue number2
DOIs
Publication statusPublished - 2015 Feb 1

All Science Journal Classification (ASJC) codes

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

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