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:
Oct. 31, 2017
Filed:
Feb. 21, 2017
Applicant:
Seoul Semiconductor Co., Ltd., Ansan-si, KR;
Inventors:
Assignee:
Seoul Semiconductor Co., Ltd., Ansan-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 41/14 (2006.01); H05B 33/08 (2006.01);
U.S. Cl.
CPC ...
H05B 33/0809 (2013.01); H05B 33/0845 (2013.01);
Abstract
An LED lighting apparatus according to exemplary embodiments includes a rectification circuit configured to rectify a modulated AC voltage to generate a drive voltage, an LED driving module connected to a plurality of LED groups and configured to apply a drive current to at least one of the plurality of LED groups according to a level of the drive voltage, and a dimming level detector configured to detect a dimming level corresponding to the drive voltage. The LED driving module is configured to compare the detected dimming level to a reference value and block the drive current based on a result of the comparison.