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:
Apr. 02, 2013
Filed:
Apr. 07, 2009
Michael Haacke, Aachen, DE;
Ulrich Hechtfischer, Aachen, DE;
Michael Haacke, Aachen, DE;
Ulrich Hechtfischer, Aachen, DE;
Koninklijke Philips Electronics N. V., Eindhoven, NL;
Abstract
A high pressure gas discharge lamp includes a discharge vessel with electrodes that project into a discharge space of a volume of 12-20 mm. The discharge space has a filling of rare gas and a metal halide composition which is free of mercury. The metal halide composition includes at least halides of Sodium and Scandium with a mass ratio of halides of Sodium and Scandium of 0.9-1.5. The lamp further includes an outer enclosure provided around the discharge vessel. The outer enclosure is sealed and filled with a gas at a pressure below 1 bar. The lamp has an efficiency equal to or greater than 90 Im/W in a steady state operation at an electrical power of 25 W.