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:
Mar. 07, 2006
Filed:
Mar. 07, 2005
R. Edward English, Jr., Cincinnati, OH (US);
Sean M. Donnelly, Portland, OR (US);
Simon Magarill, Cincinnati, OH (US);
Arlie Richard Conner, Portland, OR (US);
R. Edward English, Jr., Cincinnati, OH (US);
Sean M. Donnelly, Portland, OR (US);
Simon Magarill, Cincinnati, OH (US);
Arlie Richard Conner, Portland, OR (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A projection display system employs one or more color modifying aperture stops, such as apodizing aperture stops, to provide high contrast, balanced color and high throughput. One projection system includes a reflective liquid crystal-on-silicon light valve positioned with a polarizing beam splitter, such as a wire grid polarizing beam splitter, for each of the primary color component light paths to separately impart image information into each of the primary color components of light. A color combiner receives and combines the primary color components of light with imparted image information to provide light representing a polychromatic display image. At least one aperture stop is positioned along at least one of the primary color component light paths to balance relative intensities of the primary color components of light.