Rear-projection screen

Details Rear-projection screen Rear-projection screen

1996-04-03

1998-05-12

Font, Frank G.

Optical: systems and elements

Projection screen

Embedded particles

359457, 359460, 359707, 359742, G03B 2160, G02B 1320, G02B 308

Patent

active

057514780

ABSTRACT:
A rear-projection screen having at least a Fresnel lens and a light-diffusing member, and is characterized by having vertical-direction light diffusion properties greater at its upper and lower end portions than at its middle portion. For example, the light-diffusing member contains light-diffusing fine particles and has a vertical lenticular lens that diffuses light in the vertical direction, provided on the light-incident surface of the Fresnel lens. This decreases the rainbows caused by misdirected light and also improves the brightness at the border, without causing a lowering of peak gain.

REFERENCES:
patent: 3712707 (1973-01-01), Henkes, Jr.
patent: 5432636 (1995-07-01), Ishii et al.
patent: 5457572 (1995-10-01), Ishii et al.
patent: 5477380 (1995-12-01), Watanabe et al.
Patent Abstracts of Japan, vol. 18, No. 621 (P-1832), Nov. 25, 1994, JP-A-06 235976, Aug. 23, 1994.
Patent Abstracts of Japan, vol. 7, No. 196 (P-219), Aug. 26, 1983, JP-A-58 093043, Jun. 2, 1983.

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-987682