Lenticular lens for use in back projection type television recei

Details Lenticular lens for use in back projection type television recei Lenticular lens for use in back projection type television recei

1990-07-25

1991-12-10

Arnold, Bruce Y.

Optical: systems and elements

Projection screen

Unitary sheet comprising plural refracting areas

359455, 359627, G03B 2160

Patent

active

050712241

ABSTRACT:
A lenticular lens is provided for use in a back projection type television receiver. The lenticular lens is provided with an exit face having formed thereon a lens portion and two reflecting portions. The lens portion refracts light from a lenticule before the light emerges therefrom. The reflecting portions are on both sides of said lens portion, and each has a reflecting face erected with respect to the screen surface. Part of the incident light is totally reflected by the reflecting portion toward the lens portion whereby the light emerges from the lens portion. Because of this arrangement, the pitch between adjacent lenticules or exit faces can be reduced without rendering the lenticular lens unduly thin.

REFERENCES:
patent: 2738706 (1956-03-01), Thompson, Jr.
patent: 4418986 (1983-12-01), Yata et al.
patent: 4490010 (1984-12-01), Honda et al.

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