The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 29, 2012
Filed:
Dec. 21, 2005
Casimer M. Decusatis, Poughkeepsie, NY (US);
Timothy M. Trifilo, Poughkeepsie, NY (US);
Casimer M. DeCusatis, Poughkeepsie, NY (US);
Timothy M. Trifilo, Poughkeepsie, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An apparatus and method for stereoscopic 3D image projection and viewing using a single projection source, polarization modulation, and passive eyewear. This approach is applicable to frame sequential video created using existing 3D graphics APIs, as well as other video signal formats, and is compatible with existing digital light processor (DLP) technology for both front and rear projection systems. An alternating polarizer is used to modulate the projected image, and an electronic control circuit is described which can stabilize the alternating polarizer in both frequency and phase lock with a DLP visual signal (as an alternate embodiment, a frequency lock with a fixed phase offset may be employed). A preferred embodiment enables an existing DLP projection system to be enhanced with 3D capability, while an alternate embodiment allows this capability to be integrated into the design of new DLP based projection systems.