| 摘要 |
PROBLEM TO BE SOLVED: To allow a discharge tube to have a longer service life and to generate stable discharge, where the discharge tube repeats to generate the discharge between the discharge surface of an upper discharge electrode tip and the discharge surface of a lower discharge electrode tip, which face each other at the center in an airtight tube. SOLUTION: The discharge tube comprises an airtight tube 10A, lid bodies 26, 28 bonded to a metallized surface 40 in the airtight tube 10A, and trigger lines 60, 80 formed on the inner wall surface of the airtight tube 10A so as to extend along the axial direction (Y1, Y2 directions). A discharge gap 29 is formed between first and second discharge electrodes 22, 24 formed on the lid bodies 26, 28, respectively. Trigger lines are composed of sub discharge trigger lines 60 connected to the metallized surface 40 and main discharge trigger lines 80 insulated from the metallized surface 40, where a plurality of the main discharge trigger lines 80 are formed on the inner wall surface of the airtight tube 10A at the same pitch (W), and the sub discharge trigger lines 60 are formed between a pair of the second trigger lines 80 adjacent to each other respectively. COPYRIGHT: (C)2005,JPO&NCIPI
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