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:
Jun. 01, 2004
Filed:
May. 07, 2002
Wilhelm Albert Groen, Einighausen, DE;
Petra Huppertz, Roetgen, DE;
Knuth Albertsen, Goch, DE;
Bernd Rausenberger, Aachen, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A gas discharge lamp with at least one capacitive coupling structure ( ) is described, which lamp has the particular characteristic that the coupling structure ( ) comprises a ceramic material which comprises pure BaTiO . In particular an additional doping of at least part of the BaTiO with barium leads to a material whose Curie temperature and saturation polarization are substantially higher and whose coercitive field strength is substantially smaller, so that a gas discharge lamp with a coupling structure manufactured from this material can be operated at substantially higher temperatures and at a lower operating voltage. Various dopings of the BaTiO with titanium, manganese, and lead are furthermore described.