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. 23, 2018
Filed:
Feb. 27, 2014
Applicant:
Inter-global Inc., St. Louis, MO (US);
Assignee:
Inter-Global, Inc., St. Louis, MO (US);
Primary Examiner:
Int. Cl.
CPC ...
H05B 37/00 (2006.01); H05B 41/00 (2006.01); H05B 33/08 (2006.01);
U.S. Cl.
CPC ...
H05B 33/0821 (2013.01);
Abstract
A method and circuit for driving an LED lighting device from an AC power source includes a rectifier and a plurality of strings of LEDs. Each string of LEDs includes a plurality of LEDs. A plurality of switches is controlled by a controller for opening and closing the switches. The controller is adapted to vary the number of strings conducting electricity by applying voltage from the rectifier to arrangements of the plurality of strings of LEDs selected based upon the present voltage of the output of the rectifier and the forward bias voltage of each of the strings of LEDs.