Gas discharge tube with discharge path limiting means

Details Gas discharge tube with discharge path limiting means Gas discharge tube with discharge path limiting means

2003-04-30

2009-08-04

Roy, Sikha (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

Having baffle, partition, or constricting means affecting...

C313S609000, C313S610000, C313S612000

Reexamination Certificate

active

07569993

ABSTRACT:
In a gas discharge tube there is carried out narrowing of the discharge path with cooperation of the first opening20and second opening12in order to obtain higher luminance of light. Further, in order to maintain excellent starting-properties of a lamp even if the discharge path is narrowed, a predetermined voltage is applied to a second discharge path limit portion11externally. Thereby, a positive or active starting discharge is produced in such a manner as to pass through the first opening20. Further, the second opening12is comprised of not only a straight section13extending in a direction of an optical axis Y, but also a spread section14extending from an end portion of the straight section13toward the first opening20.

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