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. 22, 2011
Filed:
Feb. 01, 2007
George E Matheson, North Vancouver, CA;
Ingo Speier, Saanichton, CA;
George E Matheson, North Vancouver, CA;
Ingo Speier, Saanichton, CA;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The present invention combines point light sources in combination with a light guide element and light redirecting elements into a system which can emit light across one or more extended surfaces of the light guide and may be designed to be able to emit light uniformly across the extended surfaces. The system comprises one or more light-emitting elements and a light guide in which are defined one or more voids. The light-emitting elements are optically coupled to the light guide by positioning them adjacent to a surface of the light guide, or by positioning them proximal to one or more of the voids. One or more light-emitting elements can be optically coupled to one void such that they emit light into the light guide substantially through that void and not through any other void of the one or more voids. Optically coupled to the light guide are a plurality of light redirecting elements for altering of the propagation of light through the light guide, thereby enabling light to be emitted from the surface of the light guide in a desired pattern, for example in a uniform illumination pattern.