Rear projection apparatus

Details Rear projection apparatus Rear projection apparatus

1982-11-24

1984-03-27

Haroian, Harry N.

Optics: image projectors

Cabinet encloses projector and one side of screen

Reflector between lamp and screen

353 38, 353101, 350128, 358237, G03B 2128, H04N 574

Patent

active

044390270

ABSTRACT:
A rear projection apparatus has a cabinet provided with a screen attaching portion, a rear projection screen attached to the screen attaching portion, an image projector for projecting an image onto the rear projecting screen from its back side, and a convex lens disposed at the back side of the rear projection screen, wherein the optical axis of the convex lens is shifted from its mechanical or dimensional center, and the convex lens is removably mounted to the rear projection screen so that the orientation of the lens relative to the screen can be altered whereby the light axis of the image from the rear projection screen is deflected to a predetermined direction by altering the orientation of the convex lens having the shifted optical axis in relation to the screen. The screen attaching portion of the cabinet permits altering the orientation of the lens and, thus, the direction in which the projected image is deflected, without increasing the size of the cabinet.

REFERENCES:
patent: 1475806 (1923-11-01), Elliot
patent: 2480031 (1949-08-01), Kellogg
patent: 2489835 (1949-11-01), Traub
patent: 2800054 (1957-07-01), Allison
patent: 3319517 (1967-05-01), Rondas et al.
patent: 3848980 (1974-11-01), Plummer
patent: 4136935 (1979-01-01), Cook et al.
patent: 4152047 (1979-05-01), Inoue

Affiliated with

Also associated with

Rating

Rear projection apparatus 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 apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rear projection apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1752246