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. 31, 2012
Filed:
Jul. 06, 2011
Robert C. Newman, Jr., Emmaus, PA (US);
Keith Joseph Corrigan, Allentown, PA (US);
Aaron Dobbins, Orefield, PA (US);
Mehmet Ozbek, Allentown, PA (US);
Mark S. Taipale, Harleysville, PA (US);
Joel S. Spira, Coopersburg, PA (US);
Robert C. Newman, Jr., Emmaus, PA (US);
Keith Joseph Corrigan, Allentown, PA (US);
Aaron Dobbins, Orefield, PA (US);
Mehmet Ozbek, Allentown, PA (US);
Mark S. Taipale, Harleysville, PA (US);
Joel S. Spira, Coopersburg, PA (US);
Lutron Electronics Co., Inc., Coopersburg, PA (US);
Abstract
A hybrid light source comprises a high-efficiency lamp, for example, a fluorescent lamp, and a low-efficiency lamp, for example, a halogen lamp. A control circuit individually controls the amount of power delivered to each of the high-efficiency lamp and the low-efficiency lamp, such that a total light output of the hybrid light source ranges throughout a dimming range from a minimum total intensity to a maximum total intensity. The high-efficiency lamp is turned off and the low-efficiency lamp produces all of the total light intensity of the hybrid light source when the total light intensity is below a transition intensity. The low-efficiency lamp is controlled such that the correlated color temperature of the hybrid light source decreases as the total light intensity is decreased below the transition intensity. The hybrid light source is characterized by a low impedance throughout the dimming range.