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P-160: Improvement of the contrast ratio in twisted nematic LCD
- Authors
- Lee D.-Y.[Lee D.-Y.]; Kim H.-K.[Kim H.-K.]; Lee M.-K.[Lee M.-K.]; Heo S.-H.[Heo S.-H.]; Song J.-K.[Song J.-K.]
- Issue Date
- 2011
- Citation
- Digest of Technical Papers - SID International Symposium, v.42 1, pp.1704 - 1706
- Indexed
- SCOPUS
- Volume
- 42 1
- Start Page
- 1704
- End Page
- 1706
- ISSN
- 0097-966X
- Abstract
- Mainly due to the twisted directors near surface in dark state, the decreased contrast ratio of TN mode has been observed. Here we describe the investigation of the contrast ratio of twist nematic liquid crystal display (TN-LCD) with an optical compensation film, WV-film, by using computational simulation and suggest new method to improve the contrast ratio significantly. Our results indicated that by optimizing the pitch of liquid crystal with chiral dopant, the contrast ratio was improved about 20%, but the reverse twisted region of the liquid crystal occurs. By adopting twisted WV-Film, the contrast ratio was increased about 19% without the reverse twisted region. © 2011 SID.
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Related Researcher
- SONG, JANG KUN
- Information and Communication Engineering (Electronic and Electrical Engineering)