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43.2: Energy and Area‐Efficient Driving Scheme in Cholesteric LCD by Embedded Fully Symmetric Self‐biased Switched‐Capacitor
Author(s) -
Lee YuHuei,
Huang PoHsien,
Fan MingYan,
Chen WeiChung,
Chen KeHorng,
Liu ShengFa,
Chiu PaoHsien,
Chen Sandy,
Shen ChunYu,
Hsieh MingTa,
Li HuaiAn,
Ho ChangAn,
Chen ChihJen,
Liang ChaoChiun
Publication year - 2012
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/j.2168-0159.2012.tb05849.x
Subject(s) - liquid crystal display , voltage , scheme (mathematics) , capacitor , switched capacitor , power (physics) , energy (signal processing) , computer science , electrical engineering , electronic engineering , materials science , engineering , optoelectronics , physics , mathematical analysis , mathematics , quantum mechanics
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 mm 2 .