ELECTRODE, MANUFACTURING METHOD THEREFOR, AND HIGH PRESSURE DISCHARGE LAMP
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United States of America Patent
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N/A
Issued Date -
Jun 21, 2012
app pub date -
Sep 1, 2010
filing date -
Sep 9, 2009
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
In an electrode having a structure in which a coil is wound around an electrode rod, an ignition performance is ensured while preventing abnormal discharge and sputtering, an appropriate electrode temperature is obtained during drive, and having this operation maintained even if the lamp is repeatedly turned on and off. A discharge lamp electrode (30) having an electrode rod (10) and a coil (20) wound around a discharge portion (11) of the electrode rod includes a first welding portion (41) in which a front end of the coil is welded to the discharge portion, a second welding portion (42) in which a rear end of the coil is welded to the discharge portion, and a weld-joining portion (50) in which at least a pair of adjacent coil portions in windings of the coil are welded to each other.
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