Large-screen projection type display

Details Large-screen projection type display Large-screen projection type display

1992-03-04

1993-04-27

Wintercorn, Richard A.

Optical: systems and elements

Projection screen

Unitary sheet comprising plural refracting areas

G03B 2160

Patent

active

052067610

ABSTRACT:
It is an object of the invention to provide a large-screen projection type display capable of reducing the moire interference due to the periodical structure of the linear Fresnel lenses and lenticular lenses. Since the moire interference is attributed to the shades S generated from the Fresnel sheet 1, these shades are diverged at a divergence angle .epsilon. by the action of the small-pitch lenticular lenses 4, so that the shades can be eliminated on the light-incident side surface of the lenticular sheet 3 which is located at a distance D from behind the Fresnel sheet.

REFERENCES:
patent: Re33795 (1992-01-01), Ogino
patent: 4536056 (1985-08-01), Oguino
patent: 4636035 (1987-01-01), Clausen et al.
patent: 4725134 (1988-02-01), Ogino
patent: 4919515 (1990-04-01), Hasegawa et al.
patent: 4919518 (1990-04-01), Ogino et al.
patent: 5066099 (1991-11-01), Yoshida et al.
patent: 5085495 (1992-02-01), Iwahara et al.

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