Transmission screen system

Details Transmission screen system Transmission screen system

1998-09-25

2000-09-05

O'Shea, Sandra

Illumination

Light modifier

Refractor

359457, 359456, F21V 500

Patent

active

061132519

ABSTRACT:
A transmission screen including a lenticular lens sheet having glass beads, having lenticular lenses, and a Fresnel lens sheet. Light is projected on the transmission screen by a projector, and an image made up of a large number of picture elements is thus projected onto the lenticular lens sheet. When the picture element pitch of the picture elements is designated by P, the arrangement pitch r of the lenticular lenses of the lenticular lens sheet is designated by r, and the particle diameter of the glass beads is designated by d, these P, r and d fulfill the following conditions: r/P.ltoreq.1/4.0 and 1.0 .mu.m.ltoreq.d.

REFERENCES:
patent: 4509822 (1985-04-01), Clausen
patent: 5005945 (1991-04-01), Van de Ven
patent: 5661600 (1997-08-01), Mitani
patent: 5751478 (1998-05-01), Yoshimura
patent: 5914809 (1999-06-01), Mitani
patent: 5959701 (1999-09-01), Watanabe

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