| 摘要 |
A mobile digital device comprises a ten- key pad being comprised of a key mat 21 on which ten-key buttons 21a - 21c with respective projections 21aa - 21cc on the under surfaces thereof are laid out and a key circuit board on which respective contacts 22a - 22c corresponding to the projections are laid out, an electrostatic capacity sensing pad 30 for sensing an electrostatic capacity change to detect a touched region and having through holes to be inserted the projections corresponding thereto and being provided with between the key mat 21 and the key circuit board 22, and a controller for selecting a function corresponded to a feature of the touched region detected by the electrostatic capacity sensing pad and executing the selected function. Owing to such constructions, a desired function can be selected by way of finger touching to the mobile digital device.
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