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. 16, 1996
Filed:
Dec. 13, 1994
Stephen S Wilson, San Juan Capistrano, CA (US);
Mark E Whitebook, Dana Point, CA (US);
Jay E Philippbar, San Clemente, CA (US);
Prolux Corporation, San Juan Capistrano, CA (US);
Abstract
A power supply for an incandescent lamp by which sufficient power is supplied to the lamp to enable the lamp to reach its desired color temperature without exceeding the break over voltage of its filament even though the peaks of the alternating current voltage applied to the power supply exceed the break-over voltage of the filament of the lamp. This is achieved in a preferred embodiment by full-wave rectification of the alternating current voltage applied to the power supply to produced an unfiltered voltage comprising a series of half-cycle sine waves of a particular polarity. This voltage is applied to the lamp. However, when the voltage of each half cycle is above the breakover voltage of the lamp, the lamp is switched out of the circuit, so that only those portions at the beginning and end of each half cycle which are below a particular voltage are actually applied to the lamp.