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:
Feb. 22, 2005
Filed:
Mar. 19, 2001
Albrecht Kraus, Kerkrade, NL;
Bernd Rausenberger, Aachen, DE;
Wilhelm Albert Groen, Einighausen, NL;
Horst Dannert, Aachen, DE;
Albrecht Kraus, Kerkrade, NL;
Bernd Rausenberger, Aachen, DE;
Wilhelm Albert Groen, Einighausen, NL;
Horst Dannert, Aachen, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to a low-pressure gas discharge lamp which includes at least one discharge vessel and at least two capacitive coupling-in structures and operates at an operating frequency f. In order to achieve a better efficiency in combination with a small structural volume, a high luminous flux, a low operating voltage, a low electromagnetic emission, a high resistance against switching transients and a long service life for the low-pressure gas discharge lamp, it is proposed to form each capacitive coupling-in structure from at least one dielectric having a thickness d and a dielectric constant ε, each dielectric being subject to the condition d/(f.ε)<10cm.s. A substantially larger amount of light can thus be generated per lamp length (lumen/cm).