Video display system with an oscillating projector screen

Details Video display system with an oscillating projector screen Video display system with an oscillating projector screen

2007-08-13

2010-06-22

Dowling, William C (Department: 2878)

Optics: image projectors

Structurally related projector and screen

C353S007000, C353S009000, C353S010000, C353S121000, C353S122000, C359S446000, C359S475000, C359S476000, C359S477000, C359S462000, C472S060000, C472S119000

Reexamination Certificate

active

07740359

ABSTRACT:
An apparatus for displaying images from a video projector. The apparatus includes a virtual projector screen assembly with an elongate screen element, such as a rod, that is mounted at one end to a base. The base is adapted for pivoting about its axis, arid a driver mechanism pivots the, base at high frequencies. During operation, the screen element oscillates between two edge positions with images projected from the projector being displayed on a side of the screen element facing or proximate to the projector. The two edge positions can be thought of as intersecting at the base and define a sweep angle (e.g., the angular difference between the two outer travel points of the screen element that is typically less than about 90 degrees). The driver may include a motor with an oscillating output shaft that pivots the base such as with a belt attached to the base.

REFERENCES:
patent: 5678910 (1997-10-01), Martin
patent: 6302542 (2001-10-01), Tsao
patent: 6554430 (2003-04-01), Dorval et al.
patent: 6665048 (2003-12-01), Gelbart
“Propeller Clock” Mechanically Scanned LED clock; http://www.bobblick.com/techref/projects/propclock/propclock.html; Copyright 1995-2002 Bob Blick; retrieved Oct. 19, 2006.

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