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:
Feb. 21, 2011
Filed:
Aug. 23, 1999
Peter Anthony Hochstein, Troy, MI (US);
Peter Anthony Hochstein, Troy, MI (US);
Relume Corporation, Oxford, MI (US);
Abstract
An apparatus () for supplying regulated voltage d.c. electrical power to an LED array () includes a rectifier () responsive to a.c. power for generating rectified d.c. power and a power factor correcting and voltage regulating buck/boost switchmode converter () responsive to the rectified d.c. power for generating regulated voltage d.c. power to illuminate the LED array (). A battery backup system () receives the a.c. power applied to the rectifier () for charging a rechargeable battery () and sensing an a.c. power failure. A switch-over relay () is connected between the battery backup system () and the rectifier. Upon sensing a failure of the a.c. power, the battery backup system () controls the switch-over relay () to connect the battery backup system () to the rectifier () to provide d.c. power to the switchmode converter () to illuminate the LED array (). A half wave power detector () causes the apparatus () to reduce regulated d.c. power to dim the LED array ().