Energy and area-efficient driving scheme in cholesteric lcd by embedded fully symmetric self-biased switched-capacitor

Yu Huei Lee, Po Hsien Huang, Ming Yan Fan, Wei Chung Chen, Ke Horng Chen, Sheng Fa Liu, Pao Hsien Chiu, Sandy Chen, Chun Yu Shen, Ming Ta Hsieh, Huai An Li, Chang An Ho, Chih Jen Chen, Chao Chiun Liang

Research output: Contribution to journalConference articlepeer-review


The paper-like cholesteric liquid crystal display (Ch-LCD) has become the next generation of electronic readers in consuming market. The embedded fully symmetric self-biased switched-capacitor (FSSBSC) with single-inductor high voltage bipolar-output (SIHBO) converter is proposed to achieve the energy and area-efficient driving scheme. As the compact power management module, SIHBO converter can provide +/−35V bipolar outputs for row driving. In addition, the embedded FSSBSC is utilized to generate the different voltage levels for modulating the gray-color in column driving scheme. This combination carries out the effective driving operation for Ch-LCD through the demand of timing control unit. Simulated results show the achievement of +/−35V output voltage in the SIHBO converter and the variety voltage levels generated from FSSBSC. The peak efficiency is derived of 85% with the integrated chip area of 6.53 mm2.

Original languageEnglish
JournalDigest of Technical Papers - SID International Symposium
Issue number1
StatePublished - 1 Jan 2012
Event49th SID International Symposium, Seminar and Exhibition, dubbed Display Week, 2012 - Boston, United States
Duration: 3 Jun 20128 Jun 2012


  • Cholesteric liquid crystal display (Ch-LCD)
  • Fully symmetric self-biased switching capacitor
  • Power management
  • Single-inductor high-voltage bipolar-output (SIHBO) converter

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