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:
Apr. 11, 2023
Filed:
Jul. 08, 2022
Wellang Co., Ltd., Gyeonggi-do, KR;
Jong Tae Hwang, Seoul, KR;
WELLANG CO., LTD., Gyeonggi-do, KR;
Abstract
A light emitting diode (LED) driving device for driving an LED array including one or more LEDs includes a rectifier configured to provide a rectified voltage obtained from an alternating current (AC) voltage to the LED array, an LED driver configured to sequentially drain an LED driving current from the LED array via a plurality of first nodes, and a first switch circuit connected to the LED array via a plurality of second nodes. The first switch circuit includes a plurality of first switches commonly connected to a first common node which is one of the plurality of first nodes, and respectively connected to the plurality of second nodes, and a first controller configured to control the plurality of first switches to be sequentially turned on and sequentially turned off.