Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1993-08-17
1996-11-19
Gross, Anita Pellman
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 77, 359 98, 359102, G02F 11335, G02F 11337, G02F 113, C09K 1960
Patent
active
055768601
ABSTRACT:
A liquid crystal display device is disclosed. The display device uses a phase transition type guest-host mode. The device is made with a pair of substrates (31, 45). One substrate is a transparent substrate and having a transparent electrode (47) and an aligning film (48) formed in this order. The other substrate is located opposite to the transparent substrate and has an insulating film (34), a reflection plate (38), and an aligning film (44) formed in this order. The reflection plate has projections (42a,b) at the surface. The aligning films are subjected to a vertical aligning treatment relative to the respective substrates. A liquid crystal composition is disposed between the aligning films, and has a nematic liquid crystal, a chiral additive and a two-tone pigment. A helical pitch (P.sub.o) of the liquid crystal composition and the cell thickness (d) of the liquid crystal display device satisfy the relation of 1.5<d/P.sub.o .gtoreq.4.
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T. Koizumi, et al., "Reflective Multicolor LCD (II): Improvement In The Brightness", Proceedings of the SID, vol. 29/2, 1988, pp. 157-160.
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Koizumi, et al., Proceedings of the Society for Information Display ( SID), 29(2):157-160(1988).
Kimura Naofumi
Mitsui Seiichi
Nakamura Kozo
Conlin David G.
Gross Anita Pellman
Malinowski Walter J.
Neuner George W.
Sharp Kabushiki Kaisha
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