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Crystals  2013 

High Performance Negative Dielectric Anisotropy Liquid Crystals for Display Applications

DOI: 10.3390/cryst3030483

Keywords: liquid crystal display, negative dielectric anisotropy, fringe-field switching, projection displays

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Abstract:

We review recent progress in the development of high birefringence (Δ n ≥ 0.12) negative dielectric anisotropy (Δ ε < 0) liquid crystals (LCs) for direct-view and projection displays. For mobile displays, our UCF-N2 (low viscosity, negative Δ ε, high Δ n) based homogeneous alignment fringe-field switching (called n-FFS) mode exhibits superior performance to p-FFS in transmittance, single gamma curve, cell gap insensitivity, and negligible flexoelectric effect. For projection displays using a vertical alignment liquid-crystal-on-silicon (VA LCOS), our high birefringence UCF-N3 mixture enables a submillisecond gray-to-gray response time, which is essential for color sequential displays without noticeable color breakup. Our low viscosity UCF-N2 also enables multi-domain VA displays to use a thinner cell gap for achieving faster response time.

 References

[1]  Kirsch, P.; Heckmeier, M.; Tarumi, K. Design and synthesis of nematic liquid crystals with negative dielectric anisotropy. Liq. Cryst. 1999, 26, 449–452, doi:10.1080/026782999205236.
[2]  Kirsch, P.; Reiffenrath, V.; Bremer, M. Nematic liquid crystals with negative dielectric anisotropy: Molecular design and synthesis. Synlett 1999, 1999, 389–396, doi:10.1055/s-1999-2619.
[3]  Klasen, M.; Bremer, M.; Tarumi, K. New liquid-crystal materials for active matrix displays with negative dielectric anisotropy and low rotational viscosity. Jpn. J. Appl. Phys. 2000, 39, L1180–L1182, doi:10.1143/JJAP.39.1180.
[4]  Kirsch, P.; Tarumi, K. A novel type of liquid crystals based on axially fluorinated cyclohexane units. Angew. Chem. Int. Ed. 1998, 37, 484–489, doi:10.1002/(SICI)1521-3773(19980302)37:4<484::AID-ANIE484>3.0.CO;2-6.
[5]  Schadt, M. Liquid crystal materials and liquid crystal displays. Annu. Rev. Mater. Sci. 1997, 27, 305–379, doi:10.1146/annurev.matsci.27.1.305.
[6]  Hird, M.; Goodby, J.W.; Toyne, K.J. Nematic materials with negative dielectric anisotropy for display applications. Proc. SPIE 2000, 3955, 15–23, doi:10.1117/12.379979.
[7]  Ogata, M.; Ukai, K.; Kawai, T. Visual fatigue in congenital nystagmus caused by viewing images of color sequential projectors. J. Disp. Technol. 2005, 1, 314–320, doi:10.1109/JDT.2005.858918.
[8]  Chen, Y.; Sun, J.; Xianyu, H.; Wu, S.T.; Liang, X.; Tang, H. High birefringence fluoro-terphenyls for thin-cell-gap TFT-LCDs. J. Disp. Technol. 2011, 7, 478–481, doi:10.1109/JDT.2011.2150197.
[9]  Hird, M. Fluorinated liquid crystals—Properties and applications. Chem. Soc. Rev. 2007, 36, 2070–2095, doi:10.1039/b610738a.
[10]  Gray, G.W.; Hird, M.; Toyne, K.J. The synthesis of several lateral difluoro-substituted 4,4′′-dialkyl- and 4,4′′-alkoxyalkyl-terphenyls and a rationalisation of the effect of such substitution on mesophase type and transition temperatures. Mol. Cryst. Liq. Cryst. 1991, 204, 43–64, doi:10.1080/00268949108046593.
[11]  Wu, S.T.; Hsu, C.S.; Chen, J.M. Room temperature difluoro-tolane and diphenyl-diacetylene liquid crystals with negative dielectric anisotropy. Mol. Cryst. Liq. Cryst. 1997, 304, 441–445, doi:10.1080/10587259708046994.
[12]  Li, Y.; Chen, Y.; Yan, J.; Liu, Y.; Cui, J.; Wang, Q.; Wu, S.T. Polymer-stabilized blue phase liquid crystal with a negative Kerr constant. Opt. Mater. Express 2012, 2, 1135–1140, doi:10.1364/OME.2.001135.
[13]  Ge, Z.; Zhu, X.; Wu, T.X.; Wu, S.T. High transmittance in-plane switching liquid crystal displays. J. Disp. Technol. 2006, 2, 114–120, doi:10.1109/JDT.2006.874502.
[14]  Oh-e, M.; Kondo, K. Electro-optical characteristics and switching behavior of the in-plane switching mode. Appl. Phys. Lett. 1995, 67, 3895–3897, doi:10.1063/1.115309.
[15]  Lee, S.H.; Lee, S.L.; Kim, H.Y. Electro-optic characteristics and switching principle of a nematic liquid crystal cell controlled by fringe-field switching. Appl. Phys. Lett. 1998, 73, 2881–2883, doi:10.1063/1.122617.
[16]  Chen, Y.; Luo, Z.; Peng, F.; Wu, S.T. Fringe-field wwitching with a negative dielectric anisotropy liquid crystal. J. Disp. Technol. 2013, 9, 74–77, doi:10.1109/JDT.2013.2242844.
[17]  Yun, H.J.; Jo, M.H.; Jang, I.W.; Lee, S.H.; Ahn, S.H.; Hur, H.J. Achieving high light efficiency and fast response time in fringe field switching mode using a liquid crystal with negative dielectric anisotropy. Liq. Cryst. 2012, 39, 1141–1148, doi:10.1080/02678292.2012.700078.
[18]  Schiekel, M.F.; Fahrenschon, K. Deformation of nematic liquid crystals with vertical orientation in electrical fields. Appl. Phys. Lett. 1971, 19, 391–393, doi:10.1063/1.1653743.
[19]  Kahn, F.J. Electric-field-induced orientational deformation of nematic liquid-crystals: Tunable birefringence. Appl. Phys. Lett. 1972, 20, 199–201, doi:10.1063/1.1654107.
[20]  Takeda, A.; Kataoka, S.; Sasaki, T.; Chida, H.; Tsuda, H.; Ohmuro, K.; Sasabayashi, T.; Koike, Y.; Okamoto, K. A super-high image quality multi-domain vertical alignment LCD by new rubbing-less technology. SID Symp. Dig. Tech. Pap. 1998, 29, 1077–1080, doi:10.1889/1.1833672.
[21]  Ohmuro, K.; Kataoka, S.; Sasaki, T.; Koike, Y. Development of super-high-image-quality vertical-alignment-mode LCD. SID Int. Symp. Dig. Tech. Pap. 1997, 28, 845–850.
[22]  Cuypers, D.; De Smet, H.; Van Calster, A. VAN LCOS microdisplays: A decade of technological evolution. J. Disp. Technol. 2011, 7, 127–134, doi:10.1109/JDT.2010.2053018.
[23]  Khoo, I.C.; Wu, S.T. Optics and Nonlinear Optics of Liquid Crystals; World Scientific: Singapore, 1993.
[24]  Yang, D.K.; Wu, S.T. Fundamentals of Liquid Crystal Devices; Wiley: New York, NY, USA, 2006.
[25]  Wu, S.T.; Wu, C.S. Small angle relaxation of highly deformed nematic liquid crystals. Appl. Phys. Lett. 1988, 53, 1794–1796, doi:10.1063/1.99783.
[26]  Xu, D.; Rao, L.; Tu, C.-D.; Wu, S.-T. Nematic liquid crystal display with submillisecond grayscale response time. J. Disp. Technol. 2013, 9, 67–70, doi:10.1109/JDT.2012.2232902.
[27]  Wu, S.T. Nematic liquid crystal modulator with response time less than 100 μs at room temperature. Appl. Phys. Lett. 1990, 57, 986–988, doi:10.1063/1.103533.
[28]  Wu, S.T.; Margerum, J.D.; Meng, H.B.; Dalton, L.R.; Hsu, C.S.; Lung, S.H. Room-temperature diphenyl-diacetylene liquid-crystals. Appl. Phys. Lett. 1992, 61, 630–632, doi:10.1063/1.107829.
[29]  Wu, S.T.; Hsu, C.S.; Shyu, K.F. High birefringence and wide nematic range bis-tolane liquid crystals. Appl. Phys. Lett. 1999, 74, 344–346, doi:10.1063/1.123066.
[30]  Sekine, C.; Fujisawa, K.; Iwakura, K.; Minai, M. High birefringence phenylacetylene liquid crystals with low viscosity. Mol. Cryst. Liq. Cryst. 2001, 364, 711–718, doi:10.1080/10587250108025039.
[31]  Gauza, S.; Jiao, M.; Wu, S.T.; Kula, P.; D？browski, R.; Liang, X. High birefringence and low viscosity negative dielectric anisotropy liquid crystals. Liq. Cryst. 2008, 35, 1401–1408, doi:10.1080/02678290802624381.
[32]  Lee, S.H.; Lee, S.M.; Kim, H.Y.; Kim, J.M.; Hong, S.H.; Jeong, Y.H.; Park, C.H.; Choi, Y.J.; Lee, J.Y.; Koh, J.W. Ultra-FFS TFT-LCD with Super Image Quality and Fast Response Time. SID Symp. Dig. Tech. Pap. 2001, 32, 484–487, doi:10.1889/1.1831901.
[33]  Lee, S.H.; Lee, S.L.; Kim, H.Y.; Eom, T.Y. A novel wide-viewing-angle technology: Ultra-Trans View？. SID Symp. Dig. Tech. Pap. 1999, 30, 202–205, doi:10.1889/1.1833995.
[34]  Blinov, L.M.; Chigrinov, V.G. Electrooptic Effects in Liquid Crystal Materials; Springer-Verlag: New York, NY, USA, 1994.
[35]  Lee, J.H.; Park, K.H.; Kim, S.H.; Choi, H.C.; Kim, B.K.; Yin, Y. AH-IPS: Superb display for mobile device. SID Symp. Dig. Tech. Pap. 2013, 44, 32–33, doi:10.1002/j.2168-0159.2013.tb06132.x.
[36]  Wen, C.H.; Gauza, S.; Wu, S.T. High-contrast vertical alignment of lateral difluoro-terphenyl liquid crystals. Appl. Phys. Lett. 2005, 87, 191909:1–191909:3, doi:10.1063/1.2128068.
[37]  Clark, M.G.; Raynes, E.P.; Smith, R.A.; Tough, R.J.A. Measurement of the permittivity of nematic liquid-crystals in magnetic and electric-fields using extrapolation procedures. J. Phys. D Appl. Phys. 1980, 13, 2151:1–2151:11.
[38]  Wu, S.T.; Wu, C.S. Experimental confirmation of the Osipov-Terentjev theory on the viscosity of nematic liquid-crystals. Phys. Rev. A 1990, 42, 2219–2227, doi:10.1103/PhysRevA.42.2219.
[39]  Wu, S.T.; Efron, U.; Hess, L.D. Birefringence measurements of liquid-crystals. Appl. Opt. 1984, 23, 3911–3915, doi:10.1364/AO.23.003911.
[40]  Haller, I. Thermodynamic and static properties of liquid crystals. Prog. Solid State Chem. 1975, 10, 103–118, doi:10.1016/0079-6786(75)90008-4.
[41]  Wu, S.T. Birefringence dispersions of liquid-crystals. Phys. Rev. A 1986, 33, 1270–1274, doi:10.1103/PhysRevA.33.1270.
[42]  Wu, S.T.; Lackner, A.M.; Efron, U. Optimal operation temperature of liquid-crystal modulators. Appl. Opt. 1987, 26, 3441–3445, doi:10.1364/AO.26.003441.
[43]  Lien, A. Extended Jones Matrix representation for the twisted nematic liquid-crystal display at oblique-incidence. Appl. Phys. Lett. 1990, 57, 2767–2769, doi:10.1063/1.103781.
[44]  Ge, Z.B.; Wu, S.T.; Kim, S.S.; Park, J.W.; Lee, S.H. Thin cell fringe-field-switching liquid crystal display with a chiral dopant. Appl. Phys. Lett. 2008, 92, 181109:1–181109:3.
[45]  Hong, S.H.; Park, I.C.; Kim, H.Y.; Lee, S.H. Electro-optic characteristic of fringe-field switching mode depending on rubbing direction. Jpn. J. Appl. Phys. 2000, 39, L527–L530.
[46]  Sun, Y.; Zhang, Z.; Ma, H.; Zhu, X.; Wu, S.T. Optimal rubbing angle for reflective in-plane-switching liquid crystal displays. Appl. Phys. Lett. 2002, 81, 4907–4909, doi:10.1063/1.1532534.
[47]  Jiao, M.; Ge, Z.; Song, Q.; Wu, S.T. Alignment layer effects on thin liquid crystal cells. Appl. Phys. Lett. 2008, 92, 061102:1–061102:3.
[48]  Hatsumi, R.; Kubota, Y.; Moriya, K.; Kubota, D.; Tanabe, T.; Kusunoki, K.; Hirakata, Y.; Koyama, J.; Yamazaki, S.; Nakamura, A.; Chubachi, Y. Driving method of FFS-Mode OS-LCD for reducing eye strain. SID Symp. Dig. Tech. Pap. 2013, 44, 338–341, doi:10.1002/j.2168-0159.2013.tb06215.x.
[49]  Lu, R.; Zhu, X.; Wu, S.T.; Hong, Q.; Wu, T.X. Ultrawide-view liquid crystal displays. J. Disp. Technol. 2005, 1, 3–14, doi:10.1109/JDT.2005.852507.
[50]  Zhu, X.; Ge, Z.; Wu, S.T. Analytical solutions for uniaxial-film-compensated wide-view liquid crystal displays. J. Disp. Technol. 2006, 2, 2–20, doi:10.1109/JDT.2005.863599.
[51]  Armitage, D.; Underwood, I.; Wu, S.T. Introduction to Miscrodisplay; Wiley: Hoboken, NJ, USA, 2006.
[52]  Brennesholtz, M.S.; Stupp, E.H. Projection Displays; Wiley: Chichester, UK, 2008.
[53]  Gauza, S.; Zhu, X.; Piecek, W.; Dabrowski, R.; Wu, S.T. Fast switching liquid crystals for color-sequential LCDs. J. Disp. Technol. 2007, 3, 250–252, doi:10.1109/JDT.2007.900909.
[54]  Wu, S.T.; Wu, C.S. Mixed-mode twisted nematic liquid crystal cells for reflective displays. Appl. Phys. Lett. 1996, 68, 1455–1457, doi:10.1063/1.116252.
[55]  Lee, S.; Mao, C.C.; Johnson, K.M. Fast-switching liquid-crystal-on-silicon microdisplay with Framebuffer pixels and surface-mode optically compensated birefringence. Opt. Eng. 2006, 45, 127402:1–127402:8.
[56]  Fan-Chiang, K.H.; Wu, S.T.; Chen, S.H. Fringing-field effects on high-resolution liquid crystal microdisplays. J. Disp. Technol. 2005, 1, 304–313, doi:10.1109/JDT.2005.858930.
[57]  Wang, H.; Wu, T.X.; Zhu, X.; Wu, S.T. Correlations between liquid crystal director reorientation and optical response time of a homeotropic cell. J. Appl. Phys. 2004, 95, 5502–5508, doi:10.1063/1.1707210.
[58]  Chen, Y.; Peng, F.; Wu, S.T. Submillisecond-response vertical-aligned liquid crystal for color sequential projection displays. J. Disp. Technol. 2013, 9, 78–81, doi:10.1109/JDT.2013.2243403.
[59]  Wen, C.H.; Gauza, S.; Wu, S.T. Photostability of liquid crystals and alignment layers. J. Soc. Inf. Disp. 2005, 13, 805–811, doi:10.1889/1.2080522.
[60]  Kim, S.S. The world’s largest (82-in) TFT-LCD. SID Symp. Dig. Tech. Pap. 2005, 36, 1842–1847, doi:10.1889/1.2036378.
[61]  Miyachi, K.; Kobayashi, K.; Yamada, Y.; Mizushima, S. The world’s first photo alignment LCD technology applied to Generation Ten factory. SID Symp. Dig. Tech. Pap. 2010, 41, 579–582, doi:10.1889/1.3500533.
[62]  Lee, S.H.; Kim, S.M.; Wu, S.T. Emerging vertical-alignment liquid-crystal technology associated with surface modification using UV-curable monomer. J. Soc. Inf. Disp. 2009, 17, 551–559, doi:10.1889/JSID17.7.551.
[63]  Hong, H.; Shin, H.; Chung, I. In-plane switching technology for liquid crystal display television. J. Disp. Technol. 2007, 3, 361–370, doi:10.1109/JDT.2007.901562.

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