Video image rotating apparatus

Details Video image rotating apparatus Video image rotating apparatus

2005-09-27

2005-09-27

Kostak, Victor R. (Department: 2614)

Television

Video display

Projection device

C348S037000, C348S756000, C359S446000

Reexamination Certificate

active

06950153

ABSTRACT:
A video image rotating apparatus includes a rear projection screen rotatably disposed in a generally horizontal plane, thus allowing only a single mirror to be angularly positioned over the screen to project video images to viewers. An optical system is positioned below the screen and vertically aligned therewith for projecting video images onto the screen. Preferably, the video images are mechanically rotated by rotating a portion of the optical system at a rate of rotation that is one-half that of the screen so that all viewers surrounding the video image rotating apparatus will see the same picture substantially simultaneously and continuously. Alternatively, the video images produced by the optical system may be rotated by an electronic image rotation system that electronically rotates the images produced in synchronization with rotation of the screen.

REFERENCES:
patent: 3976837 (1976-08-01), Lang
patent: 4760443 (1988-07-01), Secka
patent: 4901140 (1990-02-01), Lang
patent: 4943851 (1990-07-01), Lang
patent: 4979026 (1990-12-01), Lang
patent: 5040055 (1991-08-01), Smith
patent: 6072545 (2000-06-01), Gribschaw
patent: 1-189288 (1989-07-01), None
patent: 6-273693 (1994-09-01), None

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