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:
Nov. 05, 2013
Filed:
Jan. 07, 2005
Harold E. Bellis, Ii, Garland, TX (US);
Gregory J. Hewlett, Richardson, TX (US);
Harold E. Bellis, II, Garland, TX (US);
Gregory J. Hewlett, Richardson, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Disclosed is a video display system comprising a spatial light modulator, such as a DMD modulator. The system uses a light source and color-wheel filter that is interposed between the light source and the spatial light modulator, the color-wheel filter being divided into primary color segments and at least one neutral density ('ND') segment that is complementary to at least one of the primary color segments and having a transmissivity that is lower than that of its corresponding primary color segment. At the border between the ND segment and its complementary primary color segment is an area that can be referred to as an ND spoke. The video display system modulates light from this ND spoke area along with light from the other segments.