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. 01, 2022
Filed:
Apr. 28, 2020
Appleton Grp Llc, Rosemont, IL (US);
Timothy E. Graff, Arlington Heighls, IL (US);
Pankaj P. Tikle, Pune, IN;
Ajay Tripathi, Libertyville, IL (US);
Appleton Grp LLC, Rosemont, IL (US);
Abstract
A low voltage lighting system including a fixture () having an array of LEDs () and an LED driver circuit (). The LED driver circuit () includes a Switch-mode Power Supply (SMPS) unit (), a current sensing unit (), a control unit () and a dimming input level shifting and signal conditioning unit (). The SMPS unit () produces an adequate DC power (+V, −V) for driving the LEDs (). The control unit () receives a sensed current signal from the current sensing unit () and controls the SMPS unit () to maintain the output current within a pre-determined range. The control unit () receives a dimming signal from the dimming unit () or an emergency signal from a supply unit () to alter the output power of the SMPS unit () from normal mode to dimming mode or emergency mode respectively.