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:
Sep. 19, 2006
Filed:
May. 12, 2004
Applicants:
Benjamin A. Jacobson, Chicago, IL (US);
Robert D. Gengelbach, Rochester, NY (US);
Inventors:
Benjamin A. Jacobson, Chicago, IL (US);
Robert D. Gengelbach, Rochester, NY (US);
Assignee:
Illumitech Inc., Chicago, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V 9/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
A high brightness LED phosphor coupling device. A semiconductor light source is encapsulated by a medium of first index of refraction, a layer of phosphor surrounded by a second medium of second index of refraction of optical index less than the first index and a light coupler for redirecting most of the light from the light source to an area of the phosphor about equal to the area of the light source multiplied by the square of the ratio of the first to the second index of refraction.