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    • 1. 发明授权
    • Coordinate detecting apparatus
    • 坐标检测装置
    • US4680430A
    • 1987-07-14
    • US706224
    • 1985-02-27
    • Kazuo YoshikawaToru AsanoHisashi YamaguchiHideaki TakizawaShizuo Andoh
    • Kazuo YoshikawaToru AsanoHisashi YamaguchiHideaki TakizawaShizuo Andoh
    • G06K11/00G06F3/03G06F3/033G06F3/045G08C21/00
    • G06F3/045
    • A coordinate detecting apparatus for determining the coordinate data of a point on a plane by indicating the point with a touch of a fingertip or other load to the point. The apparatus comprises a transparent resistive film forming the plane (touch panel) and a buffer circuit operating as a voltage follower circuit having substantially infinate input impedance. The buffer amplifier is operatively connected between each selected pair of facing ends of a substantially rectangular region of the resistive film, and equalizes the potentials at the ends. The change of the impedance between one of the ends and the ground is detected in accordance with the touch of the fingertip to the touch panel and is used as an original coordinate data. Further modifications concerning the avoidance of degradation in the detection quality due to fluctuations of the impedance provided by the touch of a fingertip, for example, and the methods to perform 2-dimensional coordinate detection are described.
    • 一种坐标检测装置,用于通过用指尖的触摸或其他负载指示点来确定平面上的点的坐标数据。 该装置包括形成平面(触摸面板)的透明电阻膜和作为基本上具有输入阻抗的电压跟随器电路的缓冲电路。 缓冲放大器可操作地连接在电阻膜的大致矩形区域的每个所选择的一对相对端之间,并且使末端的电位相等。 根据触摸面板的指尖的触摸检测端部和地面之间的阻抗的变化,并将其用作原始坐标数据。 描述了关于避免由于触摸触摸提供的阻抗的波动引起的检测质量退化的进一步修改以及执行二维坐标检测的方法。
    • 3. 发明授权
    • Touch sensing device
    • 触摸感应装置
    • US4567470A
    • 1986-01-28
    • US488399
    • 1983-04-25
    • Kazuo YoshikawaHisashi YamaguchiToru Asano
    • Kazuo YoshikawaHisashi YamaguchiToru Asano
    • G06F3/044G06K11/06H03K17/96G06F3/02
    • H03K17/9622H03K2017/9613
    • A touch sensing device employing a new sensing method of the present invention is composed of the sensing portion which senses capacitance change of the touch sensing electrodes forming the touch panel, plurality of capacitance compensating capacitors which are used in common for the sensing electrodes in order to compensate fluctuation of touch sensing electrodes of the touch panel, and the ROM which is storing the data for selecting the capacitance compensating capacitors. The ON-OFF output voltage levels in the touch/non-touch conditions to the touch sensing electrodes can be equalized for each electrode and thereby the touch sensing with high accuracy can be realized by selecting the capacitance compensating capacitor by means of the ROM at the time of retrieving each touch sensing electrode.
    • 采用本发明的新的感测方法的触摸感测装置由感测部分,其感测形成触摸面板的触摸感测电极的电容变化,多个电容补偿电容器共同用于感测电极,以便 补偿触摸面板的触摸感测电极的波动,以及存储用于选择电容补偿电容器的数据的ROM。 触摸/非触摸条件下的触摸/非触摸条件下的ON-OFF输出电压电平可以对于每个电极均衡,从而可以通过在ROM中的ROM选择电容补偿电容器来实现高精度的触摸感测 检索每个触摸感测电极的时间。