High-pressure metal halide discharge lamp and a lighting apparatus using the lamp
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United States of America Patent
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-
Nov 4, 2003
Grant Date -
Aug 9, 2001
app pub date -
Dec 20, 2000
filing date -
Dec 20, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A high-pressure metal halide discharge lamp includes a sealed light-transmitting discharge vessel, first and second electrodes disposed in the discharge space, and a pair of conductive wires connected to the respective electrodes. The sealed light-transmitting discharge vessel has a pair of seals and envelops a discharge space, which has a gas filling comprising rare gas and metal halides. A first electrode with an emitter disposed in the discharge space at an one side is made of a metal having a high melting point. A second electrode without an emitter disposed in the discharge space at the other side is made of a metal having a high melting point. The pair of conductive wires, which are connected to the respective electrodes, are located in the respective seals and extend from the discharge vessel.
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