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:
Jul. 05, 2016
Filed:
May. 21, 2014
Tom O'neil, Torrance, CA (US);
Lee Chiang, Sylmar, CA (US);
Tom O'Neil, Torrance, CA (US);
Lee Chiang, Sylmar, CA (US);
Other;
Abstract
A circuit is described which allows an LED driver to be controlled by a control signal in such a manner that at a predetermined dimming level the output current goes to zero instead of continuing to indefinitely low dim levels, thus avoiding the possibility of flickering or shimmer at extremely low dim levels. An electronic circuit for driving an LED load with a conventional LED drive circuit has inputs connected to a power source and output terminals providing regulated output power including a load disconnect switch in series with the LED load which has a control node responsive to a control circuit; and a control input which commands varying levels of input power. The control circuit is configured to be responsive to the control input so that when the control input corresponds to a certain continuous level of dimming, the load disconnect switch is opened.