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. 24, 2007
Filed:
Jul. 31, 2003
Tom Poehlman, Madison, AL (US);
Bryce Hesterman, Fort Collins, CO (US);
Tom Poehlman, Madison, AL (US);
Bryce Hesterman, Fort Collins, CO (US);
Universal Lighting Technologies, Inc., Madison, AL (US);
Abstract
A sensor system adapted to detect unwanted transients in the primary side of a luminous lamp load driving circuit and effect a change in operation of the driving circuit. A detection circuit is adapted to detect a transient, determine if it is an appropriate end-of-life lamp condition requiring action, and signal an inverter control circuit to provide for an adjustment or shut down of the load driving circuitry. The detection circuit is adapted to detect the transients across the direct current choke as repetitive transients occurring over a period of time. The inverter control circuit includes a negative voltage generator adapted to inhibit power flow into a transistor base inside the inverter. A modified start circuit is also provided with a restart inhibit circuit adapted to prevent the inverter from resuming normal operation after a shutdown condition has been detected.