Illumination device and liquid crystal apparatus including same

Details Illumination device and liquid crystal apparatus including same Illumination device and liquid crystal apparatus including same

1996-12-04

2000-02-01

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

349 65, 362 31, G02F 11335

Patent

active

060209445

ABSTRACT:
An illumination device is formed from a light-transmissive light guide member, and a light source disposed on a side of the light guide member to emit light to the light guide member. The light guide member is formed to include an anisotropic grating preferably at a boundary between an anisotropic member having a refractive index anisotropy and a substantially non-anisotropic member laminated on the anisotropic member. The anisotropic grating may be formed as a one-dimensionally arranged grating for causing selective diffraction of, e.g., an ordinary ray. As a result, the illumination device is caused to function as a planar light source emitting linearly polarized light of a uniform luminance distribution suitably used in combination with a transmission-type or reflection-type liquid crystal device to form a small-sized and thin liquid crystal apparatus.

REFERENCES:
patent: 3884549 (1975-05-01), Wang et al.
patent: 5210404 (1993-05-01), Cush et al.
patent: 5455178 (1995-10-01), Fattinger
patent: 5587816 (1996-12-01), Gunjima et al.
patent: 5729311 (1998-03-01), Broer et al.
patent: 5808709 (1998-09-01), Davis et al.
T. Gunjima, et al., "S32-2 New Back-Lighting Device for Liquid Crystal Displays", Proceedings of The 15th International Display Research Conference, Asia Display '95, pp. 731-734 (Oct. 16-18, 1995).

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