Back-projection screen

Details Back-projection screen Back-projection screen

2006-08-15

2006-08-15

Perkey, W. B. (Department: 2851)

Optical: systems and elements

Projection screen

Rear projection screen

C359S453000, C359S456000

Reexamination Certificate

active

07092158

ABSTRACT:
The invention concerns a screen wherein elements distributed on a single and common diopter enable both collimating and micro-focusing by relecting the light beams projected on said screen; on said diopter can also be distributed elements acting by refraction. The inventive screen has only one main optical component, hence it is not expensive to produce. The invention is particularly applicable to very compact projection devices and to situations with high projection incidence angles.

REFERENCES:
patent: 3791712 (1974-02-01), Miyagi
patent: 4003080 (1977-01-01), Maiman et al.
patent: 4512631 (1985-04-01), VanBreemen
patent: 4531812 (1985-07-01), Oguino
patent: 4674836 (1987-06-01), Yata et al.
patent: 4729631 (1988-03-01), Takahashi et al.
patent: 6020937 (2000-02-01), Bardmesser
patent: 6304379 (2001-10-01), Kobayashi
patent: 6389206 (2002-05-01), Veligdan
patent: 6597417 (2003-07-01), Veligdan
patent: 1039337 (2000-09-01), None

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