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:
Sep. 03, 2013
Filed:
Apr. 09, 2010
Applicant:
Donald L. Wray, Ocala, FL (US);
Inventor:
Donald L. Wray, Ocala, FL (US);
Assignee:
USAI, LLC., New Windsor, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
H05B 37/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of controlling a brightness level of an LED by supplying power to an LED in series with a field effect transistor and a resistor. A first voltage is supplied from a digital potentiometer to an operational amplifier. The field effect transistor is activated based on the first voltage from the operational amplifier and a second voltage is varied across the resistor when the field effect transistor is activated. The varying of the second voltage across the resistor causes a change in the brightness level of the LED.