| 摘要 |
PURPOSE: A fluorescent display device is provided, which is capable of exactly judging whether a wire is disconnected or not, within a short time. CONSTITUTION: A wire layer(100) is composed of a lead pin connection portion(111) connected to lead pins, an anode connection portion(112) connected to anodes, and a plurality of wires(110) for connecting the lead pins to desired anodes. The plurality of wires(110) has extended portions(113) extended from the anode connection portion. Ends(114) of the extended portions are concentrated at a predetermined position. Three adjacent ones of the ends of the extended portions are disposed so as to be placed at each vertex of a regular triangle.
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