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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.:

US 11405994 B1

PDFFull Text
Date of Patent:
Aug. 02, 2022

Filed:

Jul. 01, 2021

Cct switchable illuminating device

Applicant:

Savant Technologies Llc, East Cleveland, OH (US);

Inventors:

Jie Gao, Shanghai, CN;

Pan Yao, Shanghai, CN;

Zhe Wang, Shanghai, CN;

Assignee:

SAVANT TECHNOLOGIES LLC, East Cleveland, OH (US);

Attorney:

Wood IP LLC

Primary Examiner:

Jimmy T Vu

Int. Cl.
CPC ...
H05B 45/10 (2020.01); F21K 9/23 (2016.01); H05B 45/20 (2020.01); F21K 9/232 (2016.01); H05B 45/46 (2020.01); H05B 45/345 (2020.01); F21K 9/238 (2016.01);
U.S. Cl.
CPC ...
H05B 45/20 (2020.01); F21K 9/232 (2016.08); F21K 9/238 (2016.08); H05B 45/10 (2020.01); H05B 45/345 (2020.01); H05B 45/46 (2020.01);
Abstract

Provided is a switchable Correlated Color Temperature (CCT) illuminating device. The device may include a CCT switching unit, forming electrical connection with a drive power source, and a bulb shell, at least one filament being arranged inside the bulb shell, the filament including a substrate, and a first light-emitting unit group and a second light-emitting unit group arranged on the substrate and forming electrical connection with the CCT switching unit. Each of the first light-emitting unit group and the second light-emitting unit group comprises one or more light-emitting unit, the first light-emitting unit group and the second light-emitting unit group are connected in parallel and conducting directions thereof are opposite, and when one of the first light-emitting unit group and the second light-emitting unit group is in a positive ON status, the other is in a negative OFF status. When the CCT switching unit is in a first operating mode, the first light-emitting unit group is in the positive ON status, and the CCT switchable illuminating device emits light with a first CCT. When the CCT switching unit is in a second operating mode, the second light-emitting unit group is in electrical conduction, and the CCT switchable illuminating device emits light with a second CCT. Therefore, the problem that the illuminating device in the prior art has a single CCT is solved.

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