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:
Jan. 18, 2005
Filed:
Oct. 08, 1999
Applicants:
Mark E. Gardiner, Santa Rosa, CA (US);
Sanford Cobb, Lakeland, MN (US);
Kenneth A. Epstein, St. Paul, MN (US);
Wade D. Kretman, Afton, MN (US);
Inventors:
Mark E. Gardiner, Santa Rosa, CA (US);
Sanford Cobb, Lakeland, MN (US);
Kenneth A. Epstein, St. Paul, MN (US);
Wade D. Kretman, Afton, MN (US);
Assignee:
3M Innovative Properties Company, Saint Paul, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 610 ;
U.S. Cl.
CPC ...
Abstract
An optical element, such as a lightguide or an optical film, is formed with a predetermined, programmed pattern of optical structures. The optical structures may be arranged to selectively correct for non-uniformities in the output a lightguide, or may be arranged to otherwise enhance the performance of a display.