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. 15, 2016
Filed:
Aug. 17, 2012
Charles Neugebauer, Los Altos, CA (US);
Jason Wong, Millbrae, CA (US);
Sam Niansheng Qiu, Palo Alto, CA (US);
David Klawon, Tucson, AZ (US);
Charles Neugebauer, Los Altos, CA (US);
Jason Wong, Millbrae, CA (US);
Sam Niansheng Qiu, Palo Alto, CA (US);
David Klawon, Tucson, AZ (US);
NOOK DIGITAL, LLC, New York, NY (US);
Abstract
A system for illuminating a reflective display or other material from a planar front device and a method of manufacture thereof. The system includes a light guide plate that conducts light from an edge light source across the face of a reflective display. Micro lenses are formed on the inner or outer surface of the light guide and direct the light conducted in the light guide toward the display. A stepped index layer is formed on the surface of light guide plate containing the micro lenses. The stepped index layer has an index of refraction lower than an index of refraction of the light guide plate to assist in the total internal reflection of light injected into the light guide plate. A top layer protective coat or touch screen can be laminated to the outside of the light guide plate.