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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 11441742 B1

PDFFull Text
Date of Patent:
Sep. 13, 2022

Filed:

Jun. 10, 2021

Led tube lamp

Applicant:

Jiaxing Super Lighting Electric Appliance Co., Ltd, Jiaxing, CN;

Inventors:

Aiming Xiong, Jiaxing, CN;

Xintong Liu, Shanghai, CN;

Junren Chen, Jiaxing, CN;

Hechen Hu, Jiaxing, CN;

Hao Zhang, Jiaxing, CN;

Assignee:

Jiaxing Super Lighting Electric Appliance Co., Ltd., Zhejiang, CN;

Attorney:

Muir Patent Law, PLLC

Primary Examiner:

Anh Q Tran

Int. Cl.
CPC ...
F21K 9/278 (2016.01); F21V 23/00 (2015.01); H05B 45/10 (2020.01); H05B 45/20 (2020.01); H05B 45/37 (2020.01); H05B 45/50 (2022.01); H05B 45/00 (2022.01); F21K 9/275 (2016.01); F21V 23/02 (2006.01); F21V 15/015 (2006.01); F21V 29/70 (2015.01); F21V 3/06 (2018.01); H05K 1/00 (2006.01); F21V 25/02 (2006.01); F21K 9/272 (2016.01); H05K 1/18 (2006.01); F21V 29/83 (2015.01); F21Y 103/10 (2016.01); F21Y 115/10 (2016.01); H05K 1/14 (2006.01);
U.S. Cl.
CPC ...
F21K 9/278 (2016.08); F21K 9/272 (2016.08); F21K 9/275 (2016.08); F21V 3/061 (2018.02); F21V 15/015 (2013.01); F21V 23/003 (2013.01); F21V 23/005 (2013.01); F21V 23/023 (2013.01); F21V 25/02 (2013.01); F21V 29/70 (2015.01); H05B 45/00 (2020.01); H05B 45/10 (2020.01); H05B 45/20 (2020.01); H05B 45/37 (2020.01); H05B 45/50 (2020.01); H05K 1/00 (2013.01); F21V 23/02 (2013.01); F21V 29/83 (2015.01); F21Y 2103/10 (2016.08); F21Y 2115/10 (2016.08); H05K 1/14 (2013.01); H05K 1/189 (2013.01); H05K 2201/09027 (2013.01); H05K 2201/10106 (2013.01); Y02B 20/30 (2013.01);
Abstract

An LED tube lamp and an impedance detection method thereof are provided. The LED tube lamp includes a power supply module comprising an impedance detection controller, configured to perform, before the LED tube lamp being lighted up, an impedance detection to determine whether the LED tube lamp is electrically connected to a foreign external impedance in series. When the LED tube lamp is connected to the foreign external impedance in series, the impedance detection controller causes at least two transient variations to an operating current of the LED tube lamp and limits the operating current of the LED tube lamp to not exceed 5 MIU in root-mean-square (RMS), in which a duration of each transient variation does not exceed 1 millisecond when the impedance detection controller performs the impedance detection.

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