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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 14 — Jul. 2, 2012
  • pp: 15522–15529

Reflective dual-mode liquid crystal display possessing low power consumption and high contrast ratio under ambient light

Taehyung Kim, Joong Ha Lee, Tae-Hoon Yoon, and Suk-Won Choi  »View Author Affiliations

Optics Express, Vol. 20, Issue 14, pp. 15522-15529 (2012)

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We propose a reflective dual-mode liquid crystal display (RD-LCD) which has advantages of long memory retention time and high contrast ratio. The proposed device adopts ideal bistable characteristics, a cell thickness over pitch (d/p) of 0.25. It can realize long memory retention time, thereby reducing power consumption. In addition, an optical configuration for the RD-LCD makes low light leakages at dark state and shows good dispersion characteristics in both dark and bright states over the entire visible ranges. We experimentally confirmed retention time over 6 months in memory mode and memory and dynamic contrast ratios of 47:1 and 43:1 under ambient light, respectively. As a result, the proposed RD-LCD demonstrates convincingly that it is a candidate for green display.

© 2012 OSA

OCIS Codes
(120.2040) Instrumentation, measurement, and metrology : Displays
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Optical Devices

Original Manuscript: May 24, 2012
Revised Manuscript: June 18, 2012
Manuscript Accepted: June 19, 2012
Published: June 25, 2012

Taehyung Kim, Joong Ha Lee, Tae-Hoon Yoon, and Suk-Won Choi, "Reflective dual-mode liquid crystal display possessing low power consumption and high contrast ratio under ambient light," Opt. Express 20, 15522-15529 (2012)

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  1. G.-D. Lee, G.-H. Kim, S.-H. Moon, J.-D. Noh, S.-C. Kim, W. S. Park, T.-H. Yoon, J. C. Kim, S. H. Hong, and S. H. Lee, “Reflective liquid crystal display using a non-twist half-wave cell,” Jpn. J. Appl. Phys.39(Part 2, No. 3A/B), L221–L224 (2000). [CrossRef]
  2. T.-H. Yoon, G.-D. Lee, and J. C. Kim, “Nontwist quarter-wave liquid-crystal cell for a high-contrast reflective display,” Opt. Lett.25(20), 1547–1549 (2000). [CrossRef] [PubMed]
  3. G.-D. Lee, H. J. Kim, T.-H. Yoon, and J. C. Kim, “Optical configuration of non-twisted liquid crystal cells for single-polarizer reflective display,” Displays22(1), 19–26 (2001). [CrossRef]
  4. T. W. Ko, J. C. Kim, H. C. Choi, K.-H. Park, S. H. Lee, K. M. Kim, W.-R. Lee, and G.-D. Lee, “Wideband quarter-wave liquid crystal cell with wide viewing angle for the reflective mode with single polarizer,” Appl. Phys. Lett.91(5), 053506 (2007). [CrossRef]
  5. K.-M. Kim, S.-H. Ji, J.-H. Lee, S. H. Lee, and G.-D. Lee, “Optical design for excellent contrast ratio in a reflective horizontal-switching liquid crystal cell,” J. Phys. D Appl. Phys.41(11), 115101 (2008). [CrossRef]
  6. D. W. Berreman and W. R. Heffner, “New bistable cholesteric liquid-crystal display,” Appl. Phys. Lett.37(1), 109–111 (1980). [CrossRef]
  7. R. Barberi, M. Giocondo, J. Li, R. Bartolino, I. Dozov, and G. Durand, “Fast bistable nematic display with grey scale,” Appl. Phys. Lett.71(24), 3495–3497 (1997). [CrossRef]
  8. A. J. Davidson and N. J. Mottram, “Flexoelectric switching in a bistable nematic device,” Phys. Rev. E Stat. Nonlin. Soft Matter Phys.65(5), 051710 (2002). [CrossRef] [PubMed]
  9. S. H. Lee, K.-H. Park, T.-H. Yoon, and J. C. Kim, “Bistable chiral-splay nematic liquid crystal device using horizontal switching,” Appl. Phys. Lett.82(24), 4215–4217 (2003). [CrossRef]
  10. G.-D. Lee, G.-H. Kim, T.-H. Yoon, and J. C. Kim, “Configuration optimization of a reflective bistable-twisted-nematic cell for high-contrast operation,” Jpn. J. Appl. Phys.39(Part 1, No. 5A), 2716–2720 (2000). [CrossRef]
  11. S. H. Lee, T.-H. Yoon, and J. C. Kim, “Optimized configuration for transmissive and reflective bistable chiral-splay nematic liquid crystal device,” Appl. Phys. Lett.88(18), 181101 (2006). [CrossRef]
  12. J. H. Lee, T. Kim, H. K. Shin, C. G. Jhun, S.-B. Kwon, D.-G. Kim, W. S. Kim, T.-H. Yoon, and J. C. Kim, “Reflective dual-mode liquid crystal display switchable between dynamic and memory modes,” Appl. Phys. Lett.97(13), 133510 (2010). [CrossRef]
  13. T. Kim, J. H. Lee, B. W. Park, K.-H. Kim, T.-H. Yoon, and S.-W. Choi, “Long memory retention time and high contrast ratio in a tristate liquid crystal display device,” Appl. Opt.51(12), 2178–2182 (2012). [CrossRef] [PubMed]
  14. C. G. Jhun, C. P. Chen, U. J. Lee, S. R. Lee, T.-H. Yoon, and J. C. Kim, “Tristate liquid crystal display with memory and dynamic operating modes,” Appl. Phys. Lett.89(12), 123507 (2006). [CrossRef]
  15. R. N. Thurston, “Unit sphere description of liquid-crystal configurations,” J. Appl. Phys.52(4), 3040–3052 (1981). [CrossRef]
  16. S. J. Kim, H. Y. Kim, S. H. Lee, Y. K. Lee, K. C. Park, and J. Jang, “Cell gap-dependent transmittance characteristic in a fringe field-driven homogeneously aligned liquid crystal cell with positive dielectric anisotropy,” Jpn. J. Appl. Phys.44(9A), 6581–6586 (2005). [CrossRef]
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  18. C. G. Jhun, C. P. Chen, S. L. Lee, J. I. Back, T.-H. Yoon, and J. C. Kim, “Disclination velocity in bistable chiral splay nematic liquid crystal device,” Jpn. J. Appl. Phys.45(6A), 5063–5068 (2006). [CrossRef]
  19. P. Yeh and C. Cu, Optics of Liquid Crystal Displays (John Wiley & Sons, 1999), Chap. 4.

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