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    • 21. 发明申请
    • COORDINATE POSITION DETECTION DEVICE FOR TOUCH PANEL
    • 用于触摸面板的坐标位置检测装置
    • US20100026527A1
    • 2010-02-04
    • US12278826
    • 2007-02-07
    • Tomohiko NishimuraTakeshi YamaguchiSaburoh Miyamoto
    • Tomohiko NishimuraTakeshi YamaguchiSaburoh Miyamoto
    • H03M1/22
    • G06F3/03547G06F3/044
    • A coordinate position detection device according to the present invention includes: charging circuits having both the capability of charging a coupling capacitance in a capacitive-coupling touch panel with a position-detection resistive film whose potential periodically varies between a positive potential and a negative potential and the capability of restoring the charged coupling capacitance to its state prior to charging; current-to-voltage conversion circuits converting into a voltage the total amount of charging currents of the coupling capacitance after the charging circuits supply the charging current to the coupling capacitance a plurality of times; and a computation device detecting the coordinate position of a touched area based on the outputs of the current-to-voltage conversion circuits. The coordinate position detection device is characterized in that the number of charging operations performed when the potential at the position-detection resistive film is positive is substantially equal to the number of charging operations performed when the potential at the position-detection resistive film is negative. With this configuration, it is possible to improve the accuracy with which the coordinate position of a touched area is detected even when the potential at the position-detection resistive film periodically varies.
    • 根据本发明的坐标位置检测装置包括:充电电路具有将电容耦合触摸面板中的耦合电容充电的能力与其电位周期性地在正电位和负电位之间变化的位置检测电阻膜;以及 在充电之前将充电耦合电容恢复到其状态的能力; 电流 - 电压转换电路将充电电路的充电电流多次提供给耦合电容,从而将耦合电容的充电电流的总量转换为电压; 以及计算装置,其基于所述电流 - 电压转换电路的输出来检测被触摸区域的坐标位置。 坐标位置检测装置的特征在于,当位置检测电阻膜的电位为正时进行的充电操作的数量基本上等于当位置检测电阻膜的电位为负时执行的充电操作次数。 利用这种配置,即使当位置检测电阻膜的电位周期性变化时,也可以提高检测到触摸区域的坐标位置的精度。
    • 25. 发明授权
    • Defect-signal generating circuit and optical disk reproducing device having the same
    • 缺陷信号发生电路和具有该缺陷信号产生电路的光盘再现装置
    • US07339867B2
    • 2008-03-04
    • US11057339
    • 2005-02-11
    • Takeshi YamaguchiRyo Ando
    • Takeshi YamaguchiRyo Ando
    • G11B7/00
    • G11B20/10203
    • An optical disk reproducing device has a defect-signal generating circuit including a peak-holding-signal generating circuit for generating a peak-hold signal based on an RF signal read from a recording medium, an intermediate-signal generating circuit for generating an intermediate signal based on the peak-hold signal, a signal-level adjusting circuit for generating a threshold signal based on the intermediate signal, a threshold-signal adjusting circuit for adjusting the level of the threshold signal, and a comparator for generating a defect signal based on the peak-hold signal and threshold signal. The threshold-signal adjusting circuit includes at least one of: a first adjusting circuit for raising the threshold signal in the event the peak-hold signal falls below the threshold signal due to the peak-hold signal and the threshold signal being reversed; and a second adjusting circuit for lowering the threshold signal in the event the peak-hold signal exceeds the threshold signal, due to the reversal.
    • 光盘再现装置具有缺陷信号发生电路,该缺陷信号产生电路包括:峰值保持信号产生电路,用于根据从记录介质读取的RF信号产生峰值保持信号;产生中间信号的中间信号产生电路 基于所述峰值保持信号,生成基于所述中间信号的阈值信号的信号电平调整电路,用于调整所述阈值信号的电平的阈值信号调整电路,以及基于 峰值保持信号和阈值信号。 阈值信号调整电路包括以下至少一个:第一调整电路,用于在峰值保持信号由于峰值保持信号和阈值信号反相而在阈值信号下降的情况下提升阈值信号; 以及第二调整电路,用于在峰值保持信号超过阈值信号的情况下,由于反转而降低阈值信号。
    • 26. 发明申请
    • Display Device with Touch Sensor, and Drive Method for the Device
    • 带有触摸传感器的显示设备和设备的驱动方法
    • US20070262966A1
    • 2007-11-15
    • US11665999
    • 2005-10-21
    • Tomohiko NishimuraSaburoh MiyamotoToshihisa NakanoHiroshi HamadaTakeshi Yamaguchi
    • Tomohiko NishimuraSaburoh MiyamotoToshihisa NakanoHiroshi HamadaTakeshi Yamaguchi
    • G06F3/041
    • G06F3/044
    • A touch-sensored display device 20 according to the present invention includes: a counter substrate 6 disposed on a viewer side of an active matrix substrate 8 via a display medium layer 4, the counter substrate 6 having a counter electrode 5 which opposes pixel electrodes; a display panel driving circuit 14 for supplying to the counter electrode 5 a common voltage which undergoes periodic inversion in polarity; a transparent conductive film 7 for position detection placed so as to oppose the counter electrode 5 via the counter substrate 6; a strobe signal generation circuit 32 for generating a strobe signal which is in synchronization with a polarity inversion period of the common voltage, and a noise-cut current signal generation circuit 30 for generating a noise-cut current signal which is obtained by eliminating based on the strobe signal a predetermined portion from a current flowing from a terminal connected to the transparent conductive film 7 for position detection.
    • 根据本发明的感触显示装置20包括:经由显示介质层4设置在有源矩阵基板8的观察者侧的对置基板6,对置基板6具有与像素电极相对的对置电极5; 显示面板驱动电路14,用于向对向电极5提供在极性上经历周期性反转的公共电压; 用于位置检测的透明导电膜7,经由对置基板6与相对电极5相对放置; 用于产生与公共电压的极性反转周期同步的选通信号的选通信号发生电路32,以及用于产生噪声截止电流信号的噪声截止电流信号产生电路30,该噪声切断电流信号通过基于 选通脉冲从从连接到用于位置检测的透明导电膜7的端子流出的电流中发出预定的部分。