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:
May. 19, 2015
Filed:
Sep. 03, 2010
Robert A. Erhardt, Schaumburg, IL (US);
William Lawrence Keith, Lake in the Hills, IL (US);
Raman Nair Harish Gopala Pillai, Mt. Prospect, IL (US);
Jerzy Janczak, Libertyville, IL (US);
Ningliang MI, Arlington Heights, IL (US);
Srinivasa Baddela, Streamwood, IL (US);
Robert A. Erhardt, Schaumburg, IL (US);
William Lawrence Keith, Lake in the Hills, IL (US);
Raman Nair Harish Gopala Pillai, Mt. Prospect, IL (US);
Jerzy Janczak, Libertyville, IL (US);
Ningliang Mi, Arlington Heights, IL (US);
Srinivasa Baddela, Streamwood, IL (US);
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Abstract
An electronic ballast with dimming circuit including an electronic ballast dimming circuit receiving an analog dimming signal, the electronic ballast dimming circuit including an input dimming circuit () operable to receive the analog dimming signal () at an analog dimming signal input (); and an output dimming circuit () operably connected to the input dimming circuit (), the output dimming circuit () being operable to receive a fixed frequency signal () having a variable duty cycle and to generate an analog dimming control signal () in response to the analog dimming signal (). Output voltage at the analog dimming signal input () is a function of the variable duty cycle of the fixed frequency signal () when the analog dimming signal () is not present at the analog dimming signal input ().