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:
Jan. 19, 2010
Filed:
Mar. 01, 2005
Lukas Küpper, Aachen, DE;
Michael Haacke, Aachen, DE;
Lukas Küpper, Aachen, DE;
Michael Haacke, Aachen, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A lamp, containing ≦100 ppm Hg, includes a burner chamber having an axis, the axis having a section ≧0.05 mm. The burner chamber has a recess oriented toward a light arc produced in the burning chamber to suppress arc curvature. The lamp has an arc-luminescence profile of luminescence (measured in cd/m)/mm with an average slope over that section which is ≧|300,000,000| (cd/m)/mm. Preferably, the profile maximum value is ≧90,000,000 cd/m. In one embodiment, the arc-making device includes two electrodes disposed for producing the light arc across their two tips, the depth of the recess being sufficiently small so as not to extend between the two tips.