A new pixel circuit compensating for brightness variation in large size and high resolution AMOLED displays

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

*Corresponding author for this work

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

A new pixel design and driving method for active-matrix organic light-emitting diode (AMOLED) display using low-temperature polycrystalline silicon thin-film transistor (LTPS-TFT) is proposed. The new 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. The proposed pixel circuit has been verified to realize uniform output current by the simulation work using HSPICE software. The simulated error rate of the output current is also discussed in this paper. The novel pixel design has great potential for use in large size and high resolution AMOLED displays.

Original languageEnglish
Pages (from-to)398-403
Number of pages6
JournalIEEE/OSA Journal of Display Technology
Volume3
Issue number4
DOIs
StatePublished - 1 Dec 2007

Keywords

  • Active-matrix organic light-emitting diode (AMOLED)
  • Currrent-resistance (I-R) drop
  • Pixel design
  • Poly-crystalline silicon thin-film transistors (poly-Si TFTs)
  • Uniformity

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