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:
Jul. 19, 2011
Filed:
Jun. 26, 2008
Marijan Kostrun, Tolland, CT (US);
Helmar Adler, Danvers, MA (US);
Marijan Kostrun, Tolland, CT (US);
Helmar Adler, Danvers, MA (US);
Other;
Abstract
A high-intensity discharge lamp includes a discharge vessel made of an insulator, and a cathode and anode. A V-shaped gap is provided between the anode and a first region of the vessel directly adjacent to where the anode separates from an interior surface of the vessel. A secondary cathode is provided on an exterior surface of the vessel at the first region, where the secondary cathode is positioned so that the V-shaped gap and the first region are between the secondary cathode and the anode. An electric field at the first region produces a dielectric barrier discharge (DBD) which generates ultraviolet (UV) and vacuum ultraviolet VUV photons that impinge on the cathode and initiate a breakdown between the cathode and anode.