Television – Video display – Projection device
Patent
1998-01-07
2000-06-06
Harvey, David E.
Television
Video display
Projection device
348789, 348744, 348739, 348 37, 359446, H04N 5740
Patent
active
060725451
ABSTRACT:
An image rotating apparatus presents a projected video image upon a rear projection screen that is rotated extremely rapidly about a vertical axis which exactly bisects the picture in the vertical plane. The rotational rate is such that an entire audience, regardless of their position about the apparatus, can view the projected video image simultaneously. The video image rotating apparatus utilizes light valve technology to create red, green and blue images from an analog composite video signal, and a Phillips prism that aligns the images produced by the light valves for projection through an optical system. The image produced by the light valves is rotated, either mechanically or electronically, in synchronization with rotation of the projection screen. The projection screen itself eliminates the need for a separate shutter by both expanding the projected image generally parallel to the screen's axis of rotation, and constricting the width of the projected image generally perpendicularly to the screen's axis of rotation.
REFERENCES:
patent: 3976837 (1976-08-01), Lang
patent: 4760443 (1988-07-01), Secka
patent: 4901140 (1990-02-01), Lang et al.
patent: 4943851 (1990-07-01), Lang et al.
patent: 4979026 (1990-12-01), Lang et al.
patent: 5061049 (1991-10-01), Hornbeck
patent: 5331454 (1994-07-01), Hornbeck
patent: 5450094 (1995-09-01), Li et al.
patent: 5459610 (1995-10-01), Bloom et al.
patent: 5629801 (1997-05-01), Staker et al.
"Digital Light Processing.TM. and MEMS: Reflecting the Digital Display Needs of the Networked Society," by Larry J. Hornbeck, dated Jun. 10-14, 1996, 13 pages.
"Challenges of a Digital Micromirror Device.TM.: Modeling and Design," by R.L. Knipe, dated Jun. 10-14, 1996, 12 pages.
Gribschaw Franklin C.
Lang Paul W.
Tadic-Galeb Biljana
LandOfFree
Video image rotating 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 Video image rotating apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video image rotating apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2218055