| 摘要 |
PROBLEM TO BE SOLVED: To extend display area versus the area of housing unit in comparison with conventional one to save electricity, improve brightness, and avoid vibration and breakdown of a cathode. SOLUTION: An anode and a cathode filament are prepared in the housing unit of the fluorescent display tube. Cathode supporting members 20, which tenses the cathode 10, comprises a base 21 which is fixed to the anode substrate 2, anchors 22 on the base including arm parts 22a working as a elastic member and tab parts 22b fixed to one end of the cathode, and supports 23 which are prepared on the base separately from the arm parts 22a of adjacent anchor 22 and fixed to one end of the cathode. Since adjacent anchor and support are separated by a slit or the like, length of the arm part can be set smaller than conventional one, height of the cathode can be shortened to reduce cathode voltage and save power and improve the brightness. The vibration of the anchor is hard to be transmitted to the support and the cathode fixed to the support becomes hard to breakdown. COPYRIGHT: (C)2004,JPO
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