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:
Aug. 27, 2019
Filed:
Nov. 09, 2015
Signify Holding B.v., Eindhoven, NL;
Priya Ranjan Mishra, Banglore, IN;
Rakeshbabu Panguloori, Banglore, IN;
SIGNIFY HOLDING B.V., Eindhoven, NL;
Abstract
A driver circuit has a driver unit () which provides a current for the load () based on an input voltage () comprising first and second terminals (). The driver unit () comprises a linear driver which comprises a current regulating element (Q) between the input and the load, said element having a controllable resistive characteristic. A compensation unit () in series with the driver unit () and the input voltage provides a compensating voltage. This is used to control the voltage across the driver unit in dependence on the input voltage and operating conditions of the load. The compensation unit () comprises a switch mode power converter and a second capacitor (C) as an energy source of the switch mode power converter, with the current regulating element (Q), the load () and the second capacitor (C) in series connection between the first and second terminals (). In this way, the operating range of the driver unit can be reduced to reduce power loss on the driver unit, and the compensating voltage can also be used with an energy harvesting system to increase overall system efficiency.