| 摘要 |
PURPOSE:To provide the panel game machine in which information is inputted to a display screen by touching a non-piezoelectric substrate, which is equipped with an ultrasonic transmitter/ receiver and the display screen of a display device, with a finger. CONSTITUTION:When an electric signal is inputted from an interdigital electrode T1, the electric signal is converted to a surface acoustic wave(SAW), propagated through a piezoelectric ceramic thin plate 6 of an ultrasonic device 1 and further propagated through a glass substrate 5. Among the SAWs propagated through the glass substrate 5, only the SAWs at a central frequency and the adjacent frequency shown by interdigital electrodes R11-R14 of an ultrasonic device 3 are converted to electric signals and outputted from the interdigital electrodes R11-R14. Since an oscillator is constituted with the propagating path of SAWs between the interdigital electrodes T1 and R11 as a delay element, a driving circuit can be simplified, and driving is enabled at a low voltage with a little energy consumption. When the propagating path of SAWs is touched by a finger, the information is inputted to the display screen corresponding to the part touched by the finger. |
