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:
Mar. 12, 2019
Filed:
Sep. 19, 2017
Express Imaging Systems, Llc, Renton, WA (US);
William G. Reed, Seattle, WA (US);
EXPRESS IMAGING SYSTEMS, LLC, Renton, WA (US);
Abstract
Systems and methods for reducing low frequency (e.g., 100 Hz, 120 Hz) output ripple of a power converter which receives input power from an AC power source (e.g., AC mains). An output ripple reduction circuit is provided which is electrically coupled between an output of a power converter and a load (e.g., one or more LEDs). The output ripple reduction circuit comprises a transformer having a first winding and a second winding each wrapped around a core. The first winding has a first terminal electrically coupled to an output of the power converter and a second terminal coupled to a capacitor to form a first LC circuit. The second winding has a first terminal electrically coupled to a load and a second terminal coupled to the capacitor to form a second LC circuit.