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:
Nov. 19, 2013
Filed:
Dec. 08, 2010
Gerry Negley, Chapel Hill, NC (US);
Antony Paul Van DE Ven, Hong Kong, CN;
Paul Pickard, Morrisville, NC (US);
Gerry Negley, Chapel Hill, NC (US);
Antony Paul van de Ven, Hong Kong, CN;
Paul Pickard, Morrisville, NC (US);
Cree, Inc., Durham, NC (US);
Abstract
A linear LED lamp is disclosed. Embodiments of the invention can provide an LED-based replacement lamp for a linear or 'tube-type' bulb or a bulb with a linear filament or element. By filling the void within the lamp with an optically transmissive fluid to cool the LEDs without the use of a traditional heat sink, the light blocking effects of such a heat sink can be avoided. Thus, the LED replacement lamp can emit light in a substantially omnidirectional pattern. In some embodiments, the optically transmissive fluid medium is a liquid. In some embodiments, the optically transmissive fluid medium is a gel. An index matching medium can be used as the optically transmissive fluid medium. A color mixing treatment can optionally be included to eliminate color tints in cases where multiple LEDs of different colors are used to produce white light.