Rear-projection screen

Details Rear-projection screen Rear-projection screen

1993-12-17

1995-10-10

Wintercorn, Richard A.

Optical: systems and elements

Projection screen

Unitary sheet comprising plural refracting areas

359452, 359460, G03B 2160

Patent

active

054575729

ABSTRACT:
In a rear-projection screen comprising a Fresnel lens and a light-diffusing member containing light-diffusing fine particles, it is intended to decrease the moire and to give no dark feeling at the border even when projection systems are set in a short projection distance. For this end, in the rear-projection screen of the present invention, the thickness of the light-diffusing member is made larger at the border than at the center of the rear-projection screen, or the concentration of the light-diffusing fine particles contained in the light-diffusing member is made larger at the border than at the center so that the rear-projection screen can have light diffusion properties greater at its border than at its center. Here, any of a flat plate, a flat sheet and a lenticular lens sheet can be used as the light-diffusing member.

REFERENCES:
patent: Re33795 (1992-01-01), Ogino
patent: 4730897 (1988-03-01), McKechnie et al.
patent: 4773731 (1988-09-01), Goldenberg et al.
patent: 5196960 (1993-03-01), Matsuzaki et al.
patent: 5296922 (1994-03-01), Mitani et al.
patent: 5400114 (1995-03-01), Yoshida et al.

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