On-panel output buffer with offset compensation technique for data driver in LTPS technology

Ming-Dou Ker*, Chih Kang Deng, Ju Lin Huang

*Corresponding author for this work

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

To overcome the offset voltage (Vos) of output buffer due to large variation on characteristics of thin-film transistor (TFT) in low-temperature polysilicon (LTPS) technology, a class-B output buffer with offset compensation circuit for the data driver is presented in this paper. This proposed class-B output buffer can operate at 50-kHz operation frequency with a 2-8-V output swing for extended graphic array (XGA) application, and it has been demonstrated in 3-μm LTPS technology. Using the offset compensation technique, the Vos of output buffer can be controlled within ±100 mV under 2-to-8 V signal operation to achieve a high resolution and quality liquid crystal display (LCD) panel.

Original languageEnglish
Pages (from-to)153-158
Number of pages6
JournalIEEE/OSA Journal of Display Technology
Volume2
Issue number2
DOIs
StatePublished - 1 Jun 2006

Keywords

  • Low-temperature polycrystalline silicon (LTPS)
  • Offset compensation
  • Output buffer
  • Thin-film transistor (TFT)

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