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    • 69. 发明授权
    • Coordinate detecting device and method
    • 坐标检测装置及方法
    • US07940063B2
    • 2011-05-10
    • US12423845
    • 2009-04-15
    • Nobuyoshi ShimizuKoichi KondohShiro HirotaNorio Endo
    • Nobuyoshi ShimizuKoichi KondohShiro HirotaNorio Endo
    • G01R27/08
    • G06F3/045G06F2203/04104
    • A coordinate detecting device includes a resistive film disposed on a quadrangular substrate; a power source for applying a voltage to the resistive film; four electrodes connected to the power source and disposed in four corners of the resistive film; four switches each disposed between the power source and a corresponding electrode; four ammeters for measuring currents flowing through corresponding electrodes; and a grounded conductive film for detecting coordinates of a contact point on the resistive film when the conductive film is brought in contact with the resistive film. The voltage is applied sequentially to the electrodes by opening and closing the switches. When the conductive film is brought in contact with the resistive film, the ammeters sequentially measure currents flowing through the corresponding electrodes. The coordinates of the contact point are detected based on positions of the electrodes and resistances obtained using the measured currents.
    • 坐标检测装置包括设置在四边形基板上的电阻膜; 用于向电阻膜施加电压的电源; 连接到电源并设置在电阻膜的四个角中的四个电极; 每个开关设置在电源和相应的电极之间; 测量流经相应电极的电流的四个电流表; 以及接地导电膜,用于当导电膜与电阻膜接触时检测电阻膜上的接触点的坐标。 通过打开和关闭开关将电压依次施加到电极。 当导电膜与电阻膜接触时,电流表依次测量流过相应电极的电流。 基于使用测量电流获得的电极的位置和电阻来检测接触点的坐标。