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:
Oct. 02, 2007
Filed:
Apr. 09, 2003
Adrianus Johannes Hendricus Petrus Van Der Pol, Roosendaal, NL;
Leonie Maria Geerdinck, Eindhoven, NL;
Engelbertus Cornelius Petrus Maria Vossen, Eindhoven, NL;
Ingrid Jozef Maria Snijkers-hendrickx, Eindhoven, NL;
Roland Blasig, Aachen, DE;
Simon Krijnen, Eindhoven, NL;
Ronald Arjan Van Den Brakel, Roosendaal, NL;
Adrianus Johannes Hendricus Petrus Van Der Pol, Roosendaal, NL;
Leonie Maria Geerdinck, Eindhoven, NL;
Engelbertus Cornelius Petrus Maria Vossen, Eindhoven, NL;
Ingrid Jozef Maria Snijkers-Hendrickx, Eindhoven, NL;
Roland Blasig, Aachen, DE;
Simon Krijnen, Eindhoven, NL;
Ronald Arjan Van Den Brakel, Roosendaal, NL;
Koninklijke Philips Electronics, N.V., Eindhoven, NL;
Abstract
Low-pressure mercury vapor discharge lamp has an at least partly substantially cylindrical discharge vessel () with a length Ldv and with an internal diameter Din. The discharge vessel () encloses, in a gastight manner, a discharge space () provided with a inert gas mixture and with mercury. The discharge vessel () comprises discharge means (electrodes) for maintaining a discharge in the discharge space (). According to the invention, the ratio of the weight of mercury mHg in the discharge vessel () to the product of the internal diameterDin and the length of the discharge vessel Ldv is given by the relation: wherein C (0.01 (g/mm2. Preferably, 0.0005 (C(0.005(g/mm2. Preferably, the discharge vessel () contains less than 0.1 mg mercury. The discharge lamp according to the invention operates under unsaturated mercury conditions.