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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 10823343 B1

PDFFull Text
Date of Patent:
Nov. 03, 2020

Filed:

Jan. 11, 2020

Led tube lamp fit for being supplied by a ballast according to the voltage level of an external driving signal

Applicant:

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

Inventors:

Aiming Xiong, Jiaxing, CN;

Xintong Liu, Shanghai, CN;

Xiaojia Wu, Jinhua, CN;

Assignee:

JIAXING SUPER LIGHTING ELECTRIC APPLIANCE CO., LTD, Jiaxing, CN;

Attorney:

Simon Kuang Lu

Primary Examiner:

Anh Q Tran

Int. Cl.
CPC ...
H05B 37/00 (2006.01); H05B 41/00 (2006.01); F21K 9/278 (2016.01); F21V 17/10 (2006.01); F21V 23/00 (2015.01); F21V 23/02 (2006.01); F21V 29/83 (2015.01); F21K 9/275 (2016.01); B23K 3/047 (2006.01); B23K 1/00 (2006.01); F21V 15/015 (2006.01); F21V 3/06 (2018.01); F21V 3/10 (2018.01); H05B 45/37 (2020.01); H05B 45/50 (2020.01); C03C 21/00 (2006.01); F21V 29/70 (2015.01); F21Y 115/10 (2016.01); B23K 101/42 (2006.01);
U.S. Cl.
CPC ...
F21K 9/278 (2016.08); B23K 1/0016 (2013.01); B23K 3/047 (2013.01); F21K 9/275 (2016.08); F21V 3/061 (2018.02); F21V 3/10 (2018.02); F21V 15/015 (2013.01); F21V 17/101 (2013.01); F21V 23/006 (2013.01); F21V 23/009 (2013.01); F21V 23/02 (2013.01); F21V 29/83 (2015.01); H05B 45/37 (2020.01); H05B 45/50 (2020.01); B23K 2101/42 (2018.08); C03C 21/002 (2013.01); F21V 29/70 (2015.01); F21Y 2115/10 (2016.08); Y02B 20/341 (2013.01);
Abstract

An LED tube lamp comprises an LED module for emitting light; a rectifying circuit for rectifying an input external driving signal to produce a rectified signal; and a ballast interface circuit coupled to the LED module and comprising a detection circuit configured to determine that the external driving signal is a high frequency or high voltage signal when the voltage level of the rectified signal is higher than a predefined first threshold level. The ballast interface circuit causes an open circuit for the LED module when the voltage level of the rectified signal is higher than a predefined second threshold level but lower than the predefined first threshold level. And the ballast interface circuit causes current conduction in the LED module when the voltage level of the rectified signal, as based on an external driving signal from an inductive ballast, is lower than the predefined second threshold level.

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