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:
Jan. 30, 2018
Filed:
Jan. 27, 2017
Jiaxing Super Lighting Electric Appliance Co., Ltd, Jiaxing, CN;
Aiming Xiong, Jiaxing, CN;
Xintong Liu, Jiaxing, CN;
Xiaojia Wu, Jiaxing, CN;
Hechen Hu, Jiaxing, CN;
Jiaxing Super Lighting Electric Appliance Co., Ltd., Jiaxing, Zhejiang, CN;
Abstract
An LED tube lamp is provided. The LED tube lamp includes a lamp tube having a first pin and a second pin at a first end of the lamp tube and a third pin and a fourth pin at a second end of the lamp tube, for receiving an external driving signal; a light strip disposed in the lamp tube, comprising an LED module for emitting light; a rectifying circuit for rectifying the external driving signal to produce a rectified signal; a filtering circuit coupled to the rectifying circuit, for filtering the rectified signal in order to drive the LED module; a current-limiting element for receiving the external driving signal input at one or more of the pins, the current-limiting element coupled to one or more of the pins, and coupled to the rectifying circuit; and a ballast interface circuit coupled to or in the rectifying circuit, and coupled to the current-limiting element, for the LED tube lamp to be compatible with a ballast providing the external driving signal, wherein the ballast interface circuit has a first terminal and a second terminal and is configured to determine whether the external driving signal is output from a ballast, according to a state of a property of the external driving signal, or according to a state of a property of a detection signal transmitted through the first terminal and the second terminal upon the external driving signal being input to the LED tube lamp.