| 摘要 |
<P>PROBLEM TO BE SOLVED: To detect an operation, in a non-contact state, performed at an operation position corresponding to an operation position display on a display section. <P>SOLUTION: An input device (for example a portable terminal device 100) comprises: a display section 60 which performs a plurality of operation position displays (for example operation position displays 61 to 66); and a detection section which detects an operation performed at an operation position configured in a specific space, in front of the input device, for each of the plurality of the operation position displays. The detection section has: a first piezo-electric element (an oscillating piezo-electric element 31) to oscillate ultrasonic wave toward the space in front of the input device; a second piezo-electric element (a receiving piezo-electric element 21) to detect the ultrasonic wave oscillated by the first piezo-electric element; and a determination section to determine at which operation position the operation is performed based on a detection result of the second piezo-electric element. <P>COPYRIGHT: (C)2012,JPO&INPIT |
