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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.:

US 11647574 B1

PDFFull Text
Date of Patent:
May. 09, 2023

Filed:

Dec. 07, 2021

Voltage regulator circuit for led luminaire

Applicant:

Elemental Led, Inc., Reno, NV (US);

Inventor:

William H. Avery, Jr., Reno, NV (US);

Assignee:

Elemental LED, Inc., Reno, NV (US);

Attorney:

United IP Counselors, LLC

Primary Examiner:

Jimmy T Vu

Int. Cl.
CPC ...
H05B 45/10 (2020.01); F21V 23/06 (2006.01); H05B 45/355 (2020.01); H05B 45/56 (2020.01); F21V 23/00 (2015.01); H05B 45/18 (2020.01); F21S 4/28 (2016.01); H05B 45/34 (2020.01); H05B 47/24 (2020.01); H05B 45/14 (2020.01); H05B 45/325 (2020.01); F21Y 115/10 (2016.01); F21Y 103/10 (2016.01);
U.S. Cl.
CPC ...
H05B 45/355 (2020.01); F21S 4/28 (2016.01); F21V 23/002 (2013.01); F21V 23/005 (2013.01); F21V 23/06 (2013.01); H05B 45/14 (2020.01); H05B 45/18 (2020.01); H05B 45/325 (2020.01); H05B 45/34 (2020.01); H05B 45/56 (2020.01); H05B 47/24 (2020.01); F21Y 2103/10 (2016.08); F21Y 2115/10 (2016.08);
Abstract

A voltage-regulating drive circuit for an LED luminaire is disclosed. The drive circuit includes one or several series of LED light engines. A voltage source with a regulator is connected to the series of LED light engines to forward-bias the light engines. The circuit also includes a driver integrated circuit, which may drive the series of LED light engines using, e.g., pulse-width modulation (PWM). The circuit also includes a feedback circuit connected to the cathode end of the series of LED light engines. The feedback circuit receives a remainder voltage and creates a feedback output signal that upregulates or downregulates the regulator of the voltage source to keep a minimum operating voltage on the driver integrated circuit and to compensate for variations in forward voltages among LED light engines in the series.

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