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. 03, 2009
Filed:
May. 02, 2005
Applicants:
Steven M. Penn, Plano, TX (US);
D. Scott Dewald, Dallas, TX (US);
Steven P. Krycho, Plano, TX (US);
Inventors:
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/14 (2006.01); G03B 21/28 (2006.01); G02B 9/08 (2006.01); G02F 1/135 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical system and method of increasing the contrast of a projected image. The optical system () comprises a combination of aperture stops () in at least one of the illumination and projection paths to filter scattered light and/or light prone to scatter into the projection aperture.