Starting aid for HID lamp

Details Starting aid for HID lamp Starting aid for HID lamp

2011-07-19

2011-07-19

Williams, Joseph L (Department: 2889)

Electric lamp and discharge devices

With gas or vapor

Envelope with particular structure

C313S643000, C313S573000, C313S631000, C313S607000, C313S234000

Reexamination Certificate

active

07982400

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.

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