Lens array sheet and transmission screen and rear projection...

Details Lens array sheet and transmission screen and rear projection... Lens array sheet and transmission screen and rear projection...

2006-05-30

2006-05-30

Dang, Hung Xuan (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

By surface composed of lenticular elements

C359S455000, C359S619000, C359S626000

Reexamination Certificate

active

07054068

ABSTRACT:
A lens array sheet, a transparent screen using the same, and a rear-projection display device are provided in which it is possible to control a perspective angle for the image in both a horizontal direction and a vertical direction without causing a problem in that a gain (brightness) of a light is reduced by an optical absorption and an S/N ratio is reduced by an increased white dispersion.A first lens array18and a second lens array20which are formed by disposing a plurality of half-cylindrical lenses17, 19in parallel on a common plain (a surface of a base member layer13a) such that longitudinal directions of the cylindrical lenses17, 19should be orthogonal to each other. Unified lens array layer13band a shading layer16in which a section through which a light does not transmit is formed on a focal plain of the lens array layer13bform a lens array sheet. Furthermore, fresnel lens are combined so as to form a transparent screen.

REFERENCES:
patent: 2618198 (1952-11-01), Luboshez
patent: 4548469 (1985-10-01), Inoue et al.
patent: 5714218 (1998-02-01), Nishio et al.
patent: 58-81526 (1983-06-01), None
patent: 11-344769 (1999-12-01), None

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