Front projection screen with lenticular front surface

Details Front projection screen with lenticular front surface Front projection screen with lenticular front surface

1995-07-21

1997-09-16

Malley, Daniel P.

Optical: systems and elements

Projection screen

Embedded particles

359443, 359453, 359460, G03B 2160

Patent

active

056686625

ABSTRACT:
A front projection screen is made up of a front portion and a rear portion, the front portion having a front surface lenticular lens array and light scattering particles forming a diffusion region between the front and rear surfaces, and the rear portion having a reflective surface spaced apart from the diffusion region. In use, an incoming ray of projected light traverses the diffusion region and the space between the diffusion region and the reflective surface, before being reflected back through these regions again. Thus, the ray traverses different portions of the diffusion region in different directions, increasing the likelihood that the ray will encounter at least one scattering particle, thus reducing the incidence of speckle. A stiffening layer of a glass plate with an anti-reflection coating is bonded to the front surface of the screen.

REFERENCES:
patent: 4767186 (1988-08-01), Bradley et al.
patent: 4911529 (1990-03-01), Vab de Ven
patent: 4964695 (1990-10-01), Bradley, Jr.
patent: 5307205 (1994-04-01), Ludwig et al.
patent: 5400114 (1995-03-01), Yoshida et al.

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