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:
Jun. 24, 2014
Filed:
Jan. 26, 2010
Jack Yitzhak Josefowicz, Halibut Bay, CA;
Alan Shawn Winters, Stillwater Lake, CA (US);
Qiuning Chen, Halifax, CA;
Mark Adam Neary, Mount Uniacke, CA;
Jack Yitzhak Josefowicz, Halibut Bay, CA;
Alan Shawn Winters, Stillwater Lake, CA (US);
Qiuning Chen, Halifax, CA;
Mark Adam Neary, Mount Uniacke, CA;
LED Roadway Lighting Ltd., Nova Scotia, CA;
Abstract
A high efficiency light emitting diode power supply for roadway lighting fixtures is provided. The power supply enables conditioning and monitoring of input power and monitors LEDs current to ensures consistent performance of the LED by changing a power correction factor. The LED output can also be adjusted based upon age or external input parameters and by modifying the power correction factor value. In addition, the LED output can be dimmed, turned down in output to a lower level at any time of night for a prescribed duration in order to further save energy. This dimming function uses a programming scheme that keeps track of the 'seasons' (summer, fall, winter and spring) so that time of night is tracked accurately all year long.