Prismatic member with coarsened portions or triangular prismatic

Details Prismatic member with coarsened portions or triangular prismatic Prismatic member with coarsened portions or triangular prismatic

1994-08-31

1997-02-04

Gross, Anita Pellman

Liquid crystal cells, elements and systems

Particular structure

Lens or prism separate from projection system

362 27, 362 31, 362331, 349 64, 349 65, G02F 11335, G01D 1128, F21V 704, F21V 500

Patent

active

056004559

ABSTRACT:
A transparent member having a multiplicity of prism-like convex portions which are aligned in parallel to each other and formed on at least one of surfaces of the member; the member is used to be disposed between a light emitting surface side of a surface light source device and a liquid crystal display device; and by using the member, it is possible to illuminate the liquid crystal display device in a bright and uniform manner and to prevent that any stripe pattern is appeared.

REFERENCES:
patent: 4298249 (1981-11-01), Gloor et al.
patent: 4765701 (1988-08-01), Cheslak
patent: 4975807 (1990-12-01), Ohashi
patent: 5262880 (1993-11-01), Abileah
patent: 5394255 (1995-02-01), Yokota et al.
patent: 5408388 (1995-04-01), Kobayashi et al.
patent: 5442523 (1995-08-01), Kashima et al.

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