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:
Sep. 08, 2015
Filed:
Apr. 15, 2013
Applicant:
Maxim Integrated Products, Inc., San Jose, CA (US);
Inventor:
Suresh Hariharan, Livermore, CA (US);
Assignee:
Maxim Integrated Products, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 39/04 (2006.01); H05B 33/08 (2006.01);
U.S. Cl.
CPC ...
H05B 33/0815 (2013.01); Y10T 307/826 (2015.04);
Abstract
Various embodiments of the invention allow LED lamp fixtures to pass EMI testing irrespective of whether the lamp fixture is operated by a magnetic transformer or an electric transformer without causing input current waveform distortion and without defeating transformer compatibility. In certain embodiments, the type of transformer is determined based on detecting characteristic voltage waveforms and based that determination an EMI filter is automatically switched in and out of the lamp circuit.