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. 26, 2013
Filed:
Sep. 28, 2006
Applicant:
Pasi Laakkonen, Kuopio, FI;
Inventor:
Pasi Laakkonen, Kuopio, FI;
Assignee:
Nokia Corporation, Espoo, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 27/14 (2006.01); G02B 5/18 (2006.01); G02B 6/34 (2006.01); G03H 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The specification and drawings present a new apparatus and method for using a three-dimensional (3D) diffractive element (e.g., a 3D diffractive grating) for expanding in one or two dimensions the exit pupil of an optical beam in electronic devices. Various embodiments of the present invention can be applied, but are not limited, to forming images in virtual reality displays, to illuminating of displays (e.g., backlight illumination in liquid crystal displays) or keyboards, etc.