Liquid crystal display

Optical: systems and elements – Holographic system or element – Using a hologram as an optical element

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359 75, 359 76, 359102, G02F 11335, G02F 11337, G02F 113

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active

055615406

ABSTRACT:
According to the state of the art, LC displays are known whose torsion angle is between about 180.degree. and 300.degree.. Such displays exhibit good independence of angle of view of white impression and contrast, but they are not gray scale capable and are not free of hysteresis. For that reason, the invention presents a display (10) whose product of plate separation (d) and anisotropy of the angle of refraction is equal to or greater than 0.45 and smaller than 0.65 .mu.m, whose torsion angle .phi. is between 260.degree. and 360.degree., whose liquid crystal molecules (18) have an approach angle .theta. between 7.degree. and 25.degree., and encompass a liquid crystal material between the substrate plates (11) in which the relationship of the elastic constant K.sub.3 to the elastic constant K.sub.1 is between 1.4 and 0.6. The angular relationships (.beta., .gamma.) of the polarization directions P.u, P.o with the respective orientation direction .eta..u, .eta..o is a function of torsion angle .phi.. An improvement of the contrast relationships is provided, if the relationship between the upper polarization direction P.o and the lower polarization direction P.u is smaller than 90.degree..

REFERENCES:
patent: 4909605 (1990-03-01), Asano et al.
patent: 4936654 (1990-06-01), Suzaki et al.
patent: 4974940 (1990-12-01), Asano et al.
patent: 5048933 (1991-09-01), Asano
patent: 5376944 (1994-12-01), Mogi et al.
Belyaev, V. V.; Chigrinov, V. G. "Figure of merit of liquid-crystal materials for optically addressed spatial modulators." In: Applied Optics, Jan. 1993, vol. 32, No. 2, S. 141-146.
Schoji, Masato, et al. "Improvements in an Achromatic ST-LCD with a Retardation Film": In: Proceedings of the SID, vol. 32, 4, 1991 S-355-359.
JP Patent Abstract of Japan 5-61073A, P-1573, Jul. 13, 1993, vol. 17, No. 372.
JP Patent Abstract of Japan 5-66425 A., P-1576, Jul. 20, 1993, vol. 17, No. 387.
JP Patent Abstracts of Japan 5-40281 A, P-1562, Jun. 23, 1993, vol. 17, No. 332.
JP Patent Abstracts of Japan 5-27217 A., P-1554, Jun. 11, 1993, vol. 17, No. 305.
JP Patent Abstracts of Japan 5-19231, A., P-1549, Jun. 3, 1993, vol. 17, No. 290.
Patent Abstracts of Japan 4-299308 A., P-1498 Mar. 8, 1993, vol. 17, No. 112.
Patent Abstracts of Japan 4-289818., A., P-1492, Feb. 23, 1993, vol. 17, No. 90.
Patent Abstracts of Japan 4-278929 A., P-1487 Feb. 16, 1993, vol. 17, No. 76.
Patent Abstracts of Japan 4-265948 A., P-1480, Feb. 3, 1993, vol. 17, No. 54.
Patent Abstracts of Japan 4-208921 A., P-1453 Nov. 20, 1992, vol. 16, No. 551.
Patent Abstracts of Japan 4-139420 A., P-1412 Aug. 28, 1992, vol. 16, No. 409.
Patent Abstracts of Japan 4-139419 A., P-1412, Aug. 28, 1992, vol. 16, No. 409.
Patent Abstracts of Japan 4-128716 A., P-1406, Aug. 20, 1992, vol. 16, No. 393.
Patent Abstracts of Japan 3-276125 A., P-1322, Mar. 10, 1992, vol. 16, No. 96.
Patent Abstracts of Japan 2-167528 A., P-1106, Sep. 14, 1990, vol. 14, No. 430.
Patent Abstracts of Japan 2-55319 A., P-1048, May 16, 1990, vol. 14, No. 230.
Patent Abstracts of Japan 1-243021 A., P-979, Dec. 20, 1989, vol. 13, No. 576.
Patent Abstracts of Japan 1-243019 A., P-979, Dec. 20, 1989, vol. 13, No. 576.
Patent Abstracts of Japan A 63-220221 A., P812, Jan. 12, 1989, vol. 13, No. 12.
Patent Abstracts of Japan 63-70233 A., P-743, Aug. 11, 1988, vol. 12, No. 295.
Patent Abstracts of Japan 62-287225 A., P-707, May 25, 1988, vol. 12, No. 175.
Moia, F.: Schadt, M. "New Generation of Neumatic Mixtures for High-Information-Content Supertwist on Actively Addressed Twisted-Neumatic Liquid-Crystal Displays". In: Proceedings of the SID, vol. 32; 4, 1991, S.361-367.
JP Patent Abstract of Japan 5-66425 A., P-1576, Jul. 20, 1993, vol. 17, No. 387.
JP Patent Abstract of Japan 5-61073 A., P-1573, Jul. 13, 1993, vol. 17, No. 372.

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