High pressure discharge lamp and lighting method thereof
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United States of America Patent
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Jun 7, 2016
Grant Date -
Oct 15, 2015
app pub date -
Sep 17, 2014
filing date -
Apr 10, 2014
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Abstract
The present high-pressure discharge lamp is composed of an arc tube part having an internal space, a pair of tungsten electrodes disposed in opposition to each other within the internal space, and mercury and halogen encapsulated in the internal space. The halogen is excessively encapsulated into the internal space relatively to the capacity of the internal space so as to establish an appropriate halogen cycle when the mercury partially deposits without evaporating.
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