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:
Apr. 01, 2008
Filed:
Mar. 29, 2005
Willem H. Smits, Veldhoven, NL;
Robert F. M. Hendriks, Overlangel, NL;
Grigoriy Basin, San Francisco, CA (US);
Frans H. Konijn, Huizen, NL;
Robert Scott West, Morgan Hill, CA (US);
Paul S. Martin, Pleasanton, CA (US);
Gerard Harbers, Sunnyvale, CA (US);
Willem H. Smits, Veldhoven, NL;
Robert F. M. Hendriks, Overlangel, NL;
Grigoriy Basin, San Francisco, CA (US);
Frans H. Konijn, Huizen, NL;
Robert Scott West, Morgan Hill, CA (US);
Paul S. Martin, Pleasanton, CA (US);
Gerard Harbers, Sunnyvale, CA (US);
Philips Lumileds Lighting Company, LLC, San Jose, CA (US);
Abstract
Lenses and certain fabrication techniques are described. A wide-emitting lens refracts light emitted by an LED die to cause a peak intensity to occur within 50-80 degrees off the center axis and an intensity along the center axis to be between 5% and 33% of the peak intensity. The lens is particularly useful in a LCD backlighting application. In one embodiment, the lens is affixed to the backplane on which the LED die is mounted and surrounds the LED die. The lens has a hollow portion that forms an air gap between the LED die and the lens, where the light is bent towards the sides both at the air gap interface and the outer lens surface interface. The lens may be a secondary lens surrounding an interior lens molded directly over the LED die.