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. 17, 2012
Filed:
Nov. 21, 2008
Robert L. Brott, Woodbury, MN (US);
Michael J. Sykora, Deer Park, WI (US);
John C. Schultz, Afton, MN (US);
John C. Nelson, The Sea Ranch, CA (US);
Robert L. Brott, Woodbury, MN (US);
Michael J. Sykora, Deer Park, WI (US);
John C. Schultz, Afton, MN (US);
John C. Nelson, The Sea Ranch, CA (US);
3M Innovative Properties Company, Saint Paul, MN (US);
Abstract
A backlight for a stereoscopicD liquid crystal display apparatus includes a light guide having a light emission surface and an opposing light extraction surface, a first side extends between the light emission surface and the light extraction surface, and a second side extends between the light emission surface and the light extraction surface, the second side opposing the first side. A centerline extends parallel to the first side and second side and is equidistant from the first side and the second side. A center elongated prism extends along the centerline and forms a portion of the light extraction surface. A plurality of elongated prisms extend parallel to the center elongated prism wherein the prisms are progressively more canted for each subsequent elongated prism further from the center elongated prism. A plurality of light sources disposed along the first side and the second side.