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:
Mar. 02, 2010
Filed:
May. 13, 2008
Roger F. Dangel, Zug, CH;
Folkert Horst, Zürich, CH;
Tobias P. Lamprecht, Berneck, CH;
Bert Jan Offrein, Schoenenberg, CH;
Roger F. Dangel, Zug, CH;
Folkert Horst, Zürich, CH;
Tobias P. Lamprecht, Berneck, CH;
Bert Jan Offrein, Schoenenberg, CH;
International Business Machines Corporation, Armonk, NY (US);
Abstract
An optical coupling device for coupling light with an optical waveguide comprises a mirror formed within an optical waveguide. The mirror comprises a first material, a first reflective end, and a second reflective end. The first material is light conducting and has a first refractive index. The first and second reflective ends reflect and transmit light. The mirror has an axis line. The optical coupling device is useful for extracting light from a waveguide and providing a backlight for a liquid crystal display.