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:
May. 18, 2010
Filed:
Feb. 02, 2005
Aafko Hendrik Tuin, Roosendaal, NL;
Ingrid Jozef Maria Snijkers-hendrickx, Eindhoven, NL;
Ronald Arjan Van Den Brakel, Roosendaal, NL;
Aafko Hendrik Tuin, Roosendaal, NL;
Ingrid Jozef Maria Snijkers-Hendrickx, Eindhoven, NL;
Ronald Arjan Van Den Brakel, Roosendaal, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A low-pressure mercury vapor discharge lamp has a light-transmitting discharge vessel () enclosing, in a gastight manner, a discharge space () provided with a filling of mercury and a rare gas. The discharge vessel () comprises discharge means for maintaining a discharge in the discharge space (). At least a part of an inner wall () of the discharge vessel () is provided with a protective layer (). The discharge vessel () is provided with a luminescent layer () comprising a luminescent material. The luminescent layer () further comprises inorganic softening particles () with a softening point above 450° C. The size of the softening particles () is in the range from 0.01 to 10 gm. Preferably, the softening particles () are selected from the group formed by strontium borate, barium borate, yttrium borate, yttrium-strontium borate and calcium pyrophosphate.