| 摘要 |
PROBLEM TO BE SOLVED: To improve productivity in high volume by designing a low-cost tuning frequency display element placed in the inside of a stopper button at a tip of an antenna of a portable telephone set so as to be one-piece, to save the resource and to enhance accuracy and durability. SOLUTION: In the tuning frequency display element E, a light emitting element 19' in the middle of a flexible board 23 made of a polyimide or the like, a rectifier diode 15', a capacitor 17' at both sides of the element 19' are integrated by copper foil patterns 24', 24'', 24'''. A coil 22' is wound around them by a prescribed length so as to materialize a one-piece element E suitable for production in high volume. The element E is set contactless to a conductor of an antenna or the like and the light emitting state is visually confirmed in an excellent way.
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