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:
Oct. 18, 2011
Filed:
Feb. 11, 2009
Ion Bita, San Jose, CA (US);
Gang Xu, Cupertino, CA (US);
Marek Mienko, San Jose, CA (US);
Lai Wang, Milpitas, CA (US);
Russell W. Gruhlke, Milpitas, CA (US);
Ion Bita, San Jose, CA (US);
Gang Xu, Cupertino, CA (US);
Marek Mienko, San Jose, CA (US);
Lai Wang, Milpitas, CA (US);
Russell W. Gruhlke, Milpitas, CA (US);
QUALCOMM MEMS Technologies, Inc., San Diego, CA (US);
Abstract
Various embodiments of the present invention relate to enhancing the brightness of displays that employ illumination systems. In some embodiments, the illumination systems include light guides, diffractive microstructure, and light-turning features. The diffractive microstructure may be configured to receive ambient light at a first angle and produce diffracted light at a second angle greater than the first angle and greater than the critical angle for of light guide. The light is thereby guided within the light guide. The light-turning features may be configured to turn the light guided within the light guide out of a light guide and onto, for example, a spatial light modulator at near normal incidence.