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:
Apr. 05, 2022
Filed:
Jul. 20, 2018
Universal Lighting Technologies, Inc., Madison, AL (US);
Wei Xiong, Madison, AL (US);
Universal Lighting Technologies, Inc., Madison, AL (US);
Abstract
An LED driver for light modulation control includes a power converter circuit having a controller, a buffer circuit, and an energy recovery circuit. The controller is configured to selectively enable and disable both buffer control signals and gate drive signals depending on a sensed modulation control signal corresponding to a modulation-on stage and a modulation-off stage. In the modulation-on stage, the buffer control signals are enabled and the gate drive signals are disabled. In the modulation-off stage, the buffer control signals are disabled and the gate drive signals are enabled. The buffer circuit is configured for quick turn off of an LED load and for temporary storage of power from an output capacitor. The energy recovery circuit is configured to reuse the power stored in the buffer circuit before relying on an external power source to power the controller.