| 摘要 |
PROBLEM TO BE SOLVED: To surely prevent incorrect actions when keystrokes are performed by an object other than a person. SOLUTION: An information input system comprises two external electrodes 11 and 12 arranged in a contact state with the outside, and a transistor Q3 detecting current conducted through a body of a user when the user comes into contact with the external electrodes 11 and 12 and turning into an ON state when the current is detected. When input switches SW1 and SW2 are turned on by depressing an operation key by the user, voltage is applied on an analog input port 20 when being in a conductive state between the external electrodes 11 and 12, and then, information input is executed. On the other hand, when the operation key is depressed by other than the user, the external electrodes 11 and 12 are not conducted thereby the information input is not executed. COPYRIGHT: (C)2006,JPO&NCIPI
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