Abstract

A lightweight in-plane-switching liquid crystal display (IPS-LCD) using a single glass substrate and an anisotropic polymeric film is demonstrated. The liquid crystal molecules are aligned by the elongated polymer grain of the film. The alignment capability of the anisotropic film is comparable to a buffed polyimide layer. Compared to the LCD using two glass substrates,our new device exhibits a comparable contrast ratio (~514:1), driving voltage, and response time because of good LC alignment. Such an anisotropic film can also function as a phase compensation film for widening the viewing angle. This technology is particularly attractive for making single-substrate displays and also has potential for a double-layered guest-host display and a flexible display using IPS LCDs.

© 2006 IEEE

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Other (14)

R. Penterman, S. I. Klink, H. D. Koning, G. Nisato and D. J. Broer, "Single-substrate liquid crystal displays by photo-enforced stratification", Nature, vol. 417, pp. 55-58, May 2002.

P. Raynes, "Liquid crystal painting", Nature, vol. 417, pp. 28-29, May 2002.

J. P. A. Vogels, S. I. Klink, R. Penterman, H. D. Koning, E. E. A. Huitema and D. J. Broer, "Robust flexible LCDs with paintable technology", in Soc. Inform. Display Tech. Dig., vol. 35, May 2004, pp. 767-769.

I. Kim, J. H. Kim, D. Kang, D. M. Agra-Kooijman and S. Kumar, "Fabrication of electro-optic devices using liquid crystals with a single glass substrate", J. Appl. Phys., vol. 92, pp. 7699-7701, Dec. 2002.

H. Sato, H. Fujikake, H. Kikuchi, Y. Iino, M. Kawakita and Y. Tsuchiya, "Fluorinated polymer alignment layers formed at low temperature for plastic-substrate based liquid crystal devices", Jpn. J. Appl. Phys., vol. 40, pp. L53-L55, Jan. 2001.

T. Murashige, H. Fujikake, S. Ikehata and F. Sato, "Anchoring strength of thin aligned-polymer films formed by liquid crystalline monomer", Jpn. J. Appl. Phys., vol. 42, pp. 1614-1617, Apr. 2003.

R. Lu, X. Zhu, Q. Hong and S. T. Wu, "Ultrawide-view liquid crystal displays", J. Display Technol., vol. 1, no. 1, pp. 1-14, Sep. 2005.

S. T. Wu, "Birefringence dispersion of liquid crystals", Phys. Rev. A, vol. 33, pp. 1270-1274, Feb. 1986.

J. Li, C. H. Wen, S. Gauza, R. Lu and S. T. Wu, "Refractive indices of liquid crystals for display applications", J. Display Technol., vol. 1, no. 1, pp. 51-61, Sep. 2005.

S. T. Wu and D. K. Yang, Reflective Liquid Crystal Displays, New York: Wiley, 2001.

Y. H. Lin, H. Ren, Y. H. Wu, Y. Zhao, J. Fang, Z. Ge and S. T. Wu, "Polarization-independent phase modulator using a thin polymer-separated double-layered structure", Opt. Exp., vol. 13, pp. 8746-8752, Oct. 2005.

T. Uchida, H. Seki, C. Shishido and M. Wada, "Bright dichroic guest-host LCDs without a polarizer", in Proc. Soc. Inf. Display, vol. 22, Jan. 1981, pp. 41-46.

M. Hasegawa, K. Takeda, Y. Sakaguchi, J. Egelhaaf, E. Lueder, Y. Taira and A. C. Lowe, "320-dpi 4-inch reflective stacked crossed guest-host display", in SID Symp. Dig., vol. 30, May 1999, pp. 962- 965.

M. Hasegawa, C. Hellermark, A. Nishikai, Y. Taira and A. C. Lowe, "Reflective stacked crossed guest-host display with a planarized inner diffuser", in SID Symp. Dig., vol. 31, May 2000, pp. 128-131.

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