Rear projection screen

Details Rear projection screen Rear projection screen

1998-06-11

2000-12-19

Gray, David M.

Optical: systems and elements

Projection screen

359454, 359460, 353 74, G03B 2160

Patent

active

061634026

ABSTRACT:
A rear projection screen assembly is described that includes a diffuser and a polarizer. The diffuser has particles dispersed within a binder. The particles and the binder have different refractive indices and are chosen such that the diffuser spreads light of an initial polarization state a cone of angles while substantially preserving the initial polarization state of the light. The diffuser also substantially depolarizing a portion of the light that is laterally scattered in the diffuser. The polarizer is disposed to receive light transmitted through the diffuser. The polarizer transmits light of the initial polarization state while absorbing a portion of the laterally scattered light that has a different polarization state. The resolution of the overall screen assembly may be made higher while also improving other characteristics of the screen assembly.

REFERENCES:
patent: Re28634 (1975-12-01), DePalma
patent: 2287556 (1942-06-01), Land
patent: 2380241 (1945-07-01), Jelley et al.
patent: 3388027 (1968-06-01), Altman
patent: 3609000 (1971-09-01), Miyano et al.
patent: 3712707 (1973-01-01), Henkes, Jr.
patent: 4083626 (1978-04-01), Miyahara et al.
patent: 4165153 (1979-08-01), Land
patent: 4184745 (1980-01-01), Land
patent: 4268127 (1981-05-01), Oshima et al.
patent: 4472708 (1984-09-01), Anderson
patent: 4566756 (1986-01-01), Heijnemans
patent: 4679900 (1987-07-01), McKechnie et al.
patent: 4730897 (1988-03-01), McKechnie et al.
patent: 4773731 (1988-09-01), Goldenberg et al.
patent: 5111110 (1992-05-01), Houben
patent: 5307205 (1994-04-01), Ludwig, Jr. et al.
patent: 5473454 (1995-12-01), Blanchard
patent: 5594561 (1997-01-01), Blanchard
patent: 5607764 (1997-03-01), Konno et al.
patent: 5629784 (1997-05-01), Abileah et al.
patent: 5751388 (1998-05-01), Larson
patent: 5751478 (1998-05-01), Yoshimura et al.
Goldenberg et al., "Diffraction analysis of bulk diffusers for projection-screen applications", J. Opt. Soc. Am., vol. 2, No. 12, Dec., 1985.
(Anonymous), "Rear projection screen for LCD projection", Research Disclosure, Jul. 1994, pp. 341.
Eliyahu et al., "Angular intensity and polarization dependence of diffuse transmission through random media", J. Opt. Soc. Am., vol. 10, No. 3, Mar., 1993.

Affiliated with

Also associated with

Rating

Rear projection screen does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rear projection screen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rear projection screen will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-275478