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    • 1. 发明授权
    • Method for measuring distance between coordinate indicator and coordinate input device
    • 测量坐标指示器与坐标输入装置之间距离的方法
    • US08797300B2
    • 2014-08-05
    • US13141646
    • 2009-09-16
    • Yingjian LiuSonglin WuGuowei XiangYu Tian
    • Yingjian LiuSonglin WuGuowei XiangYu Tian
    • G06F3/042
    • G06F3/046G01D5/2013G06F2203/04101
    • A method for measuring a distance between a coordinate indicator and a coordinate input device, which belongs to the technical field of computer peripheral equipments. The method comprises the steps of measuring an actual amplitude of an output signal of a receiving coil in the electromagnetic induction plate by a measurement circuit in the electromagnetic induction plate; determining a distance between the coordinate indicator and the coordinate input device in accordance with the actual amplitude of the output signal, a nominal amplitude of the output signal, and a preset reference amplitude of signal. In the present invention, the distance between the coordinate indicator and the coordinate input device is determined by converting an actual amplitude of the output signal of the receiving coil at one time to a nominal amplitude of the output signal normalized by a reference amplitude of signal, which overcomes the defect of the prior art which can not indicate a distance between the coordinate indicator and the coordinate input device.
    • 属于计算机外围设备技术领域的坐标指示器与坐标输入装置之间的距离测量方法。 该方法包括以下步骤:通过电磁感应板中的测量电路测量电磁感应板中接收线圈的输出信号的实际振幅; 根据输出信号的实际振幅,输出信号的标称幅度和信号的预置参考幅度来确定坐标指示符和坐标输入装置之间的距离。 在本发明中,通过将接收线圈的输出信号的实际振幅一次转换为通过信号的基准幅度归一化的输出信号的标称幅度来确定坐标指示符与坐标输入装置之间的距离, 其克服了现有技术的不能指示坐标指示器和坐标输入装置之间的距离的缺陷。
    • 3. 发明申请
    • METHOD AND DEVICE FOR MEASURING PRESSURE-BASED INDUCTANCE OF ELECTROMAGNETIC TABLET
    • 用于测量基于压力的电磁波片电感的方法和装置
    • US20120049866A1
    • 2012-03-01
    • US13318686
    • 2009-09-07
    • Songlin Wu
    • Songlin Wu
    • G01R27/28
    • G06F3/046G06F3/03545
    • The invention relates to a method and a device for measuring pressure-based inductance of an electromagnetic tablet, which relates to the field of computer peripheral input device. The method comprises steps of: measuring a first parameter value when an electromagnetic pen is not operating; measuring a second parameter value when the electromagnetic pen is operating, and inductance value of inductor in a resonance circuit varies with pressure; and calculating the pressure-based inductance based on the first and second parameter values. The device comprises: a resonance circuit comprising an inductor whose inductance value varies with pressure when an electromagnetic pen is operating; a measurement circuit configured to measure a first parameter value when the electromagnetic pen is not operating, to measure a second parameter value when the electromagnetic pen is operating, and to calculate the is pressure-based inductance based on the first and second parameter values, the difference between the second parameter value and the first parameter value being associated with variation of the inductance value. According to the present invention, the pressure-based inductance can be calculated based on the measured first and second parameter values that vary with the inductance, and difficulty and cost for measuring the pressure-based inductance are reduced.
    • 本发明涉及一种用于测量电磁平板电脑的基于压力的电感的方法和装置,其涉及计算机外围输入装置的领域。 该方法包括以下步骤:当电磁笔不工作时测量第一参数值; 当电磁笔工作时测量第二参数值,并且谐振电路中的电感器的电感值随压力而变化; 以及基于第一和第二参数值计算基于压力的电感。 该装置包括:谐振电路,其包括电感器,其电感值随着电磁笔操作时的压力而变化; 测量电路,其被配置为当电磁笔不工作时测量第一参数值,以测量电磁笔工作时的第二参数值,并且基于第一和第二参数值计算基于压力的电感, 第二参数值与第一参数值之间的差异与电感值的变化相关联。 根据本发明,可以基于随着电感变化的所测量的第一和第二参数值来计算基于压力的电感,并且减小了用于测量基于压力的电感的难度和成本。
    • 7. 发明申请
    • Method For Measuring Distance Between Coordinate Indicator and Coordinate Input Device
    • 坐标指示器和坐标输入装置之间的距离测量方法
    • US20120086633A1
    • 2012-04-12
    • US13141646
    • 2009-09-16
    • Yingjian LiuSonglin WuGuowei XiangYu Tian
    • Yingjian LiuSonglin WuGuowei XiangYu Tian
    • G09G5/00G01R27/26
    • G06F3/046G01D5/2013G06F2203/04101
    • The invention relates to a method for measuring a distance between a coordinate indicator and a coordinate input device, which belongs to the technical field of computer peripheral equipments. The method comprises the steps of measuring an actual amplitude of an output signal of a receiving coil in the electromagnetic induction plate by a measurement circuit in the electromagnetic induction plate; determining a distance between the coordinate indicator and the coordinate input device in accordance with the actual amplitude of the output signal, a nominal amplitude of the output signal, and a preset reference amplitude of signal. In the present invention, the distance between the coordinate indicator and the coordinate input device is determined by converting an actual amplitude of the output signal of the receiving coil at one time to a nominal amplitude of the output signal normalized by a reference amplitude of signal, which overcomes the defect of the prior art which can not indicate a distance between the coordinate indicator and the coordinate input device.
    • 本发明涉及一种坐标指示器和坐标输入装置之间的距离测量方法,属于计算机外围设备技术领域。 该方法包括以下步骤:通过电磁感应板中的测量电路测量电磁感应板中接收线圈的输出信号的实际振幅; 根据输出信号的实际振幅,输出信号的标称幅度和信号的预置参考幅度来确定坐标指示符和坐标输入装置之间的距离。 在本发明中,通过将接收线圈的输出信号的实际振幅一次转换为通过信号的基准幅度归一化的输出信号的标称幅度来确定坐标指示符与坐标输入装置之间的距离, 其克服了现有技术的不能指示坐标指示器和坐标输入装置之间的距离的缺陷。