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:
Jul. 08, 2014
Filed:
Dec. 27, 2010
Paul Srimuang, San Diego, CA (US);
Paul Srimuang, San Diego, CA (US);
Empower Electronics, Inc., San Diego, CA (US);
Abstract
A ballast () for providing power to a high intensity discharge lamp () includes a first sensor () and a control subsystem (). The first sensor () generates a first signal indicative of a current level in the ballast (). The control subsystem () computes a real time power level of the ballast () based at least upon the first signal, compares the computed real time power level to a specified power level, and modifies a frequency of operation of the ballast () in response to the comparison. The first sensor () can measure the current level at an output of the ballast (). The ballast () can also include a second sensor () that generates a second signal indicative of a voltage output of the ballast (). The control subsystem () can compute the real time power level of the ballast () based upon the second signal. The control subsystem () can be configured to read a lamp specified maximum power level, receive an input indicative of a dimming level, and/or compute the specified power level based upon the lamp specified maximum power level and the dimming level. The control subsystem () can incrementally decrease the frequency when the comparison indicates that the computed real time power level is less than the specified power level and/or incrementally increase the frequency when the comparison indicates that the computed real time power level is greater than the specified power level.