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. 12, 2013
Filed:
Jul. 28, 2006
Juan Carlos Minano, Madrid, ES;
Pablo Benitez, Madrid, ES;
Julio Cesar Chaves, Madrid, ES;
Waqidi Falicoff, Newport Beach, CA (US);
William A. Parkyn, Lomita, CA (US);
Juan Carlos Minano, Madrid, ES;
Pablo Benitez, Madrid, ES;
Julio Cesar Chaves, Madrid, ES;
Waqidi Falicoff, Newport Beach, CA (US);
William A. Parkyn, Lomita, CA (US);
Light Prescriptions Innovators, LLC, Altadena, CA (US);
Abstract
Some embodiments provide luminance-preserving non-imaging backlights that comprise a luminous source emitting light, an input port that receives the light, an injector and a beam-expanding ejector. The injector includes the input port and a larger output port with a profile that expands away from the input port acting via total internal reflection to keep x-y angular width of the source image inversely proportional to its luminance. The injector is defined by a surface of revolution with an axis on the source and a swept profile that is a first portion of an upper half of a CPC tilted by its acceptance angle. The beam-expanding ejector comprising a planar waveguide optically coupled to the output port of the injector. The ejector includes a smooth upper surface, and a reflective lower surface comprising microstructured facets that refract upwardly reflected light into a collimated direction common to the facets.