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:
May. 23, 2023
Filed:
Sep. 12, 2018
Applicant:
Ledvance Gmbh, Garching bei Munchen, DE;
Inventors:
Assignee:
LEDVANCE GMBH, Garching bei Munchen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21K 9/237 (2016.01); F21K 9/232 (2016.01); F21K 9/235 (2016.01); F21V 29/10 (2015.01); F21V 29/506 (2015.01); F21Y 115/10 (2016.01); F21Y 103/10 (2016.01); F21Y 107/00 (2016.01); F21Y 107/70 (2016.01);
U.S. Cl.
CPC ...
F21V 29/10 (2015.01); F21K 9/232 (2016.08); F21K 9/235 (2016.08); F21K 9/237 (2016.08); F21V 29/506 (2015.01); F21Y 2103/10 (2016.08); F21Y 2107/00 (2016.08); F21Y 2107/70 (2016.08); F21Y 2115/10 (2016.08);
Abstract
An LED illumination device corresponds to a compact fluorescent lamp and has improved thermal properties. The illumination device includes a transparent tube having an inner wall defining a cavity, a light engine having one or more light emitting diodes, and a driver to drive the light engine. The light engine is disposed at the inner wall of the transparent tube. The arrangement of the light engine and the one or more light emitting diodes at the inner wall of the tube provides improved lighting characteristics. Simultaneously, an improved cooling is provided by the interface surface for conducting heat between the inner wall and the light engine.