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:
Jul. 18, 2023
Filed:
Mar. 31, 2021
Applicant:
Ledvance Llc, Wilmington, MA (US);
Inventors:
Soumya Kanta Ray, Methuen, MA (US);
Anil Jeswani, Acton, MA (US);
Assignee:
LEDVANCE LLC, Wilmington, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21K 9/272 (2016.01); F21V 19/00 (2006.01); F21V 23/00 (2015.01); F21V 23/04 (2006.01); F21Y 115/10 (2016.01);
U.S. Cl.
CPC ...
F21K 9/272 (2016.08); F21V 19/0005 (2013.01); F21V 23/005 (2013.01); F21V 23/0421 (2013.01); F21Y 2115/10 (2016.08);
Abstract
A tube lamp including a light source including at least one string of light emitting diodes within a tube body; end caps having pin contacts on each end of the tube body; and driver electronics including a filament detector portion provided by a passive resistance capacitor (RC) circuit that simulates the filament load of a fluorescent lamp when installed into a ballast containing fixture. The tube lamp may also include a switch for selecting light characteristics for light emitted by the light source.