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. 06, 2018
Filed:
Feb. 03, 2017
Applicant:
Semiconductor Components Industries, Llc, Phoenix, AZ (US);
Inventor:
Ningliang Mi, Arlington Heights, IL (US);
Assignee:
Semiconductor Components Industries, LLC, Phoenix, AZ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 33/08 (2006.01);
U.S. Cl.
CPC ...
H05B 33/0809 (2013.01); H05B 33/083 (2013.01); H05B 33/0845 (2013.01);
Abstract
A light emitting diode (LED) direct AC drive (DACD) circuit includes LED groups that are connected in series. An LED DACD controller includes current regulators that regulate the LED current of the LED groups. The LED DACD controller measures an on-time of an LED group, and regulates the LED current of the LED groups based on the measured on-time of the LED group.