Enhancement of brightness uniformity by a new voltage-modulated pixel design for AMOLED displays

Hau Yan Lu*, Po-Tsun Liu, Ting Chang Chang, Sien Chi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

This letter presents a new pixel design and driving method for active-matrix organic light-emitting diode (AMOLED) displays using low-temperature polycrystalline silicon thin-film transistors (TFTs). The proposed pixel circuit consists of five TFTs and one capacitor to eliminate the variation in the threshold voltage of the TFTs, and the drop in the supply voltage in a single frame operation by the source-follower-type connection and the bootstrap. The proposed pixel circuit has been verified to realize uniform output current by the simulation work using the HSPICE software. The novel pixel design has great potential for use in large-size and high-resolution AMOLED displays.

Original languageEnglish
Pages (from-to)743-745
Number of pages3
JournalIEEE Electron Device Letters
Volume27
Issue number9
DOIs
StatePublished - 1 Sep 2006

Keywords

  • Active-matrix organic light-emitting diode (AMOLED)
  • Current-resistance (IR) drop
  • Pixel design
  • Polycrystalline silicon thin-film transistors (poly-Si TFTs)
  • Uniformity

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