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1. 发明授权

US5023408A Electronic blackboard and accessories such as writing tools 失效
标题翻译：电子黑板及配件如书写工具
公开(公告)号：US5023408A
公开(公告)日：1991-06-11
申请号：US365388
申请日：1989-06-13
申请人： Azuma Murakami , Kazuo Aoki , Tsuguya Yamanami , Yoshiaki Tomofuji , Takeshi Tanaka , Satoshi Inashima , Takahiko Funahashi , Toshihide Chikami , Toshiaki Senda
发明人： Azuma Murakami , Kazuo Aoki , Tsuguya Yamanami , Yoshiaki Tomofuji , Takeshi Tanaka , Satoshi Inashima , Takahiko Funahashi , Toshihide Chikami , Toshiaki Senda
IPC分类号： B43L1/04 , G06F3/033 , G06F3/041 , G06F3/046 , G06F3/048 , G06K11/06 , H04N1/00
CPC分类号： G06F3/046 , G06F3/033 , G06F3/03545
摘要： A characteristic and the position of an implement with a tuned circuit having one of plural resonant frequencies are determined. AC energy at the plural different resonant frequencies is supplied to a two-coordinate direction coil arrangement of a position sensing tablet. The tuned circuit changes the current flowing in the coil arrangement at the implement resonant frequency. The current change is used to signal the implement position and characteristic. The implement may be an eraser for supplying a signal to an electronic display and for removing a mark from a surface of a visual display overlaying the tablet of the eraser. A housing includes a surface for erasing the marking and two tuned circuits each having a reactance positioned close to opposite edges of the erasing surface. Two switches, when activated, cause the tuned circuits to have different resonant frequencies. The switches are respectively activated when opposite eraser edges are being pushed against the display surface. The implement may also be one of a plurality of markers, each for a different color. Another display responds to the signals to display the position and colors of the markings and selectively remove markings from areas corresponding to the eraser position.

2. 发明授权

US5134689A Coordinate input system and input implement used in the system 失效
标题翻译：协调输入系统和系统中使用的输入输入
公开(公告)号：US5134689A
公开(公告)日：1992-07-28
申请号：US235588
申请日：1988-08-24
申请人： Azuma Murakami , Tsuguya Yamanami , Takahiko Funahashi , Toshiaki Senda , Toshihide Chikami
发明人： Azuma Murakami , Tsuguya Yamanami , Takahiko Funahashi , Toshiaki Senda , Toshihide Chikami
IPC分类号： G06F3/0354 , G06F3/046
CPC分类号： G06F3/046 , G06F3/03545
摘要： A coordinate input system has a tablet composed of an X-direction loop coil assembly and a Y-direction loop coil assembly, and an input pen having a tuning circuit the tuning frequency of which is variable about a predetermined frequency. The system has a coordinate detecting function for detecting the X- and Y-coordinate values of position input by the input pen, and a phase detecting function for detecting the change in the tuning frequency of the tuning circuit as a change in the phase with respect to the phase of the predetermined tuning frequency. Information concerning the detected coordinate point, e.g., spread of the coordinate point proportional to the pressure at which the pen is pressed onto the tablet, is computed in accordance with the amount of change in the phase detected by the phase detecting function.

3. 再颁专利

USRE35329E Electronic blackboard and accessories such as writing tools 失效
标题翻译：电子黑板及配件如书写工具
公开(公告)号：USRE35329E
公开(公告)日：1996-09-17
申请号：US74569
申请日：1993-06-10
申请人： Azuma Murakami , Kazuo Aoki , Tsuguya Yamanami , Yoshiaki Tomofuji , Takeshi Tanaka , Satoshi Inashima , Takahiko Funahashi , Toshihide Chikami , Toshiaki Senda
发明人： Azuma Murakami , Kazuo Aoki , Tsuguya Yamanami , Yoshiaki Tomofuji , Takeshi Tanaka , Satoshi Inashima , Takahiko Funahashi , Toshihide Chikami , Toshiaki Senda
IPC分类号： B43L1/04 , G06F3/033 , G06F3/041 , G06F3/046 , G06F3/048 , G06K11/06 , H04N1/00 , G08C21/00
CPC分类号： G06F3/046 , G06F3/033 , G06F3/03545
摘要： A characteristic and the position of an implement with a tuned circuit having one of plural resonant frequencies are determined. AC energy at the plural different resonant frequencies is supplied to a two-coordinate direction coil arrangement of a position sensing tablet. The tuned circuit changes the current flowing in the coil arrangement at the implement resonant frequency. The current change is used to signal the implement position and characteristic. The implement may be an eraser for supplying a signal to an electronic display and for removing a mark from a surface of a visual display overlaying the tablet of the eraser. A housing includes a surface for erasing the marking and two tuned circuits each having a reactance positioned close to opposite edges of the erasing surface. Two switches, when activated, cause the tuned circuits to have different resonant frequencies. The switches are respectively activated when opposite eraser edges are being pushed against the display surface. The implement may also be one of a plurality of markers, each for a different color. Another display responds to the signals to display the position and colors of the markings and selectively remove markings from areas corresponding to the eraser position.
摘要翻译：确定具有多个谐振频率中的一个的具有调谐电路的器具的特性和位置。将多个不同谐振频率的交流能量提供给位置检测图形输入板的两坐标方向的线圈排列。调谐电路在器件谐振频率下改变在线圈装置中流动的电流。当前的变化是用来表示工具的位置和特性。该工具可以是用于向电子显示器提供信号并从覆盖橡皮片的视觉显示器的表面移除标记的橡皮擦。壳体包括用于擦除标记的表面和每个具有靠近擦除表面的相对边缘定位的电抗的两个调谐电路。两个开关在被激活时使调谐电路具有不同的谐振频率。当相反的橡皮擦边缘被推压到显示表面时，开关分别被激活。工具还可以是多个标记之一，每个标记各自用于不同的颜色。另一显示器响应信号以显示标记的位置和颜色，并且从对应于橡皮擦位置的区域中选择性地移除标记。

4. 发明授权

US4988837A Position detecting device 失效
标题翻译：位置检测装置
公开(公告)号：US4988837A
公开(公告)日：1991-01-29
申请号：US516866
申请日：1990-04-30
申请人： Azuma Murakami , Tsuguya Yamanami , Takahiko Funahashi , Toshiaki Senda , Kazuo Aoki , Keiichi Siguyama , Nobuyuki Miyamori , Akio Kikuchi , Manabu Abe
发明人： Azuma Murakami , Tsuguya Yamanami , Takahiko Funahashi , Toshiaki Senda , Kazuo Aoki , Keiichi Siguyama , Nobuyuki Miyamori , Akio Kikuchi , Manabu Abe
IPC分类号： G06F3/033 , G06F3/046
CPC分类号： G06F3/046
摘要： The position on a surface of an implement including a tuned circuit with a predetermined resonant frequency is determined and displayed by an apparatus having a housing including the surface. A tablet in the housing includes coils arranged in two coordinate directions parallel to the surface. The coils are excited with AC energy having approximately the same frequency as the resonant frequency. The tuned circuit interacts with the AC energy to change the AC current flowing in the coils as a function of the implement on the tablet. An electronic two-coordinate direction display in the housing configured as a plate is superposed with and lies in a plane parallel to the tablet and the surface. The display responds to the change in AC current resulting from the interaction between the AC energy and the tuned circuit to indicate the position of the implement on the surface.

5. 发明授权

US4948926A Position detecting apparatus 失效
标题翻译：位置检测装置
公开(公告)号：US4948926A
公开(公告)日：1990-08-14
申请号：US302532
申请日：1989-01-26
申请人： Azuma Murakami , Tsuguya Yamanami , Takahiko Funahashi , Toshiaki Senda
发明人： Azuma Murakami , Tsuguya Yamanami , Takahiko Funahashi , Toshiaki Senda
IPC分类号： G06F3/041 , G06F3/033 , G06F3/046
CPC分类号： G06F3/046
摘要： A position detecting apparatus for detecting a position pointed by an input pen which comprises: a position detection section constituted by first and second coil groups each composed of a plurality of loop coils; an input pen having a tuning circuit having a predetermined frequency as a tuning frequency; selector means for successively selecting the loop coils of the first and second coil groups of the position detection section one by one; signal generation means for supplying an A.C. signal of the predetermined frequency to the loop coils; signal detection means for detecting the A.C. signal of the predetermined frequency from the loop coils; and controller means for identifying the position pointed by the position pointer on the basis of the A.C. signal detected by the signal detection means from among the loop coils of the first and second coil groups, whereby the position pointed by the input pen can be detected on the basis of the induced voltages obtained in the first and second coil groups. Because each of the first and second coil groups is constituted by a plurality of patterned coil portions, the position detecting apparatus can be made so as to have high resolution with the reduced number of coils.

6. 发明授权

US4878553A Position detecting apparatus 失效
标题翻译：位置检测装置
公开(公告)号：US4878553A
公开(公告)日：1989-11-07
申请号：US095702
申请日：1987-09-14
申请人： Tsuguya Yamanami , Takahiko Funahashi , Toshiaki Senda
发明人： Tsuguya Yamanami , Takahiko Funahashi , Toshiaki Senda
IPC分类号： G06F3/046 , G06F3/033 , G06F3/041 , G06K11/06
CPC分类号： G06F3/046 , G06F3/03545
摘要： A position detecting apparatus for detecting a position pointed by a pointer on a system such as a digitizer has the following parts: a position detection section having a plurality of loop coils arrayed in a side-by-side fashion in the direction of position detection; a selection circuit for successively selecting the loop coils one-by-one; a transmission circuit for generating an A.C. signal of a predetermined frequency to be delivered to the selected loop coil; a receiving circuit adapted to detect an induced voltage of a frequency substantially the same as that of the A.C. signal from among various voltages induced in the selected loop coil; a connection switching circuit for connecting the selected loop coil alternately to the transmission circuit and the receiving circuit; a position pointer having a tuning circuit including a coil and a capacitor and adapted to resonate with an electric wave produced by the loop coil which is supplied with the A.C. signal; and a processing device for determining the position pointed by the position pointer by processing signals representing the levels of voltages induced in the loop coils.

7. 发明授权

US5028745A Position detecting apparatus 失效
标题翻译：位置检测装置
公开(公告)号：US5028745A
公开(公告)日：1991-07-02
申请号：US403267
申请日：1989-09-28
申请人： Tsuguya Yamanami , Takahiko Funahashi , Toshiaki Senda
发明人： Tsuguya Yamanami , Takahiko Funahashi , Toshiaki Senda
IPC分类号： G06F3/046 , G06F3/033 , G06F3/041 , G06K11/06
CPC分类号： G06F3/046 , G06F3/03545
摘要： The position of an implement is determined relative to a tablet including a tuned circuit with a resonant frequency including coils arranged in two coordinate directions. Coils of the tablet are sequentially excited with AC energy having approximately the same frequency as the resonant frequency. The tuned circuit interacts with the AC energy to change the AC current flowing in coils of the tablet as a function of the implement position so the greatest changes in the AC current are in coils of the tablet closest to the implement. Detected values of changes in current as a function of coil position are interpolated to indicate the implement position.

8. 发明授权

US5466896A Position detector 失效
标题翻译：位置检测器
公开(公告)号：US5466896A
公开(公告)日：1995-11-14
申请号：US849414
申请日：1992-04-29
申请人： Azuma Murakami , Tsuguya Yamanami , Takahiko Funahashi
发明人： Azuma Murakami , Tsuguya Yamanami , Takahiko Funahashi
IPC分类号： G06F3/046 , G06F3/033 , G08C21/00
CPC分类号： G06F3/046
摘要： An electromagnetic detector having plural loop coils arranged in parallel with one another in a position detecting direction determines a position coordinate value designated by a position indicator having at least a coil. One loop coil in each of plural groups is selected simultaneously from plural loop coils of the group so not less than a predetermined number of the relative positions of these selected loop coils are not the same or are a symmetric in each group and over a plurality of groups. A loop coil on which the position indicator is positioned is determined in response to a signal amplitude pattern obtained by the loop coil selection. This makes it unnecessary to select all loop coils at the time of starting a position detecting operation, to reduce the time required to determine the coordinate value. When the coordinate value is determined, digital data corresponding to an arbitrary AC signal are converted into an analog signal, and a reception signal sampled at a predetermined cycle to convert the AC signal into digital data. These digital data are subjected to predetermined computation to calculate amplitude and phase angle with respect to an arbitrary frequency component in the reception signal, whereby the concurrent use of a plurality of coordinate indicators is effected easily.
摘要翻译： PCT No.PCT / JP90 / 01397 Sec。一九九二年四月二十九日 102（e）日期：1992年4月29日PCT 1990年10月31日PCT。具有在位置检测方向上彼此平行布置的多个环形线圈的电磁检测器确定由位置指示器指定的位置坐标值，线圈从组的多个环形线圈同时选择多个组中的每一个中的一个环形线圈，使得这些选择的环形线圈的相对位置的预定数量不小于每组中的对称或多个团体响应于通过环形线圈选择获得的信号幅度模式来确定位于其上的位置指示器所在的环形线圈。这使得在开始位置检测操作时不需要选择所有环形线圈，以减少确定坐标值所需的时间。当确定坐标值时，对应于任意交流信号的数字数据被转换为模拟信号，以及以预定周期采样的接收信号将AC信号转换为数字数据。这些数字数据经受预定的计算，以计算相对于接收信号中的任意频率分量的幅度和相位角，由此容易地实现多个坐标指示符的并发使用。

9. 发明授权

US5748110A Angular input information system relative to a tablet for determining an incline angle of a pointer or stylus 失效
标题翻译：相对于平板电脑的角度输入信息系统，用于确定指针或触控笔的倾斜角度
公开(公告)号：US5748110A
公开(公告)日：1998-05-05
申请号：US500086
申请日：1995-07-10
申请人： Yasushi Sekizawa , Takahiko Funahashi
发明人： Yasushi Sekizawa , Takahiko Funahashi
IPC分类号： G06F3/033 , G06F3/046 , H03M1/00 , G08C21/00
CPC分类号： G06F3/046
摘要： A coordinate detecting device and an angle information detecting method which are capable of detecting tilt angles of a stylus pen with high accuracy. A coordinate detecting device is made up of a plurality of sensor coils and a position indicator housing an electromagnetic coupling means, and detects coordinates and tilt angles of the position indicator by sensing an induced voltage developed in the sensor coil by means of electromagnetic interaction. The coordinate detecting device is also provided with an angle information detecting means. This angle information detecting means correct errors in a value of a predetermined function including main and sub-peaks, the errors arising from a difference between a main peak induced voltage distribution and a sub-peak induced voltage distribution within a detection width of one sensor coil, by converting either the main peak induced voltage distribution or the sub-peak induced voltage distribution so as to be similar to the other one. Then, the angle information detecting means calculate tilt angles of the position indicator using a predetermined function including the sub-peak induced voltage and the corrected main peak induced voltage.
摘要翻译：一种坐标检测装置和角度信息检测方法，其能够高精度地检测触控笔的倾斜角度。坐标检测装置由多个传感器线圈和容纳电磁耦合装置的位置指示器构成，并通过电磁相互作用检测传感器线圈中产生的感应电压来检测位置指示器的坐标和倾斜角。坐标检测装置还设置有角度信息检测装置。该角度信息检测装置校正包括主峰和次峰的预定函数的值中的误差，在一个传感器线圈的检测宽度内的主峰感应电压分布和次峰值感应电压分布之间的差异通过将主峰感应电压分布或次峰感应电压分布转换为与另一个相似。然后，角度信息检测装置使用包括副峰值感应电压和校正后的主峰感应电压的预定功能来计算位置指示器的倾斜角度。

10. 发明授权

US5763839A Device and method for detecting position using electromagnetic induction without producing discrepancy caused by the residual induction voltage of the resonant circuit 失效
标题翻译：使用电磁感应来检测位置的装置和方法，而不产生由谐振电路的剩余感应电压引起的差异
公开(公告)号：US5763839A
公开(公告)日：1998-06-09
申请号：US506811
申请日：1995-07-25
申请人： Takahiko Funahashi , Katsuhito Obi
发明人： Takahiko Funahashi , Katsuhito Obi
IPC分类号： G06F3/046 , G06F3/033 , G06F3/041 , G06F3/048 , G08C21/00 , G09G3/02
CPC分类号： G06F3/046 , Y10S177/09 , Y10T117/1004
摘要： The present invention provides a method and a device for detecting position without producing discrepancy caused by residual induction voltage of a resonant circuit, wherein it includes steps for selecting and scanning one of a multiple loop coil positioned parallel to each other towards a detecting direction to receive an electromagnetic wave (S1), and calculating coordinate values of the indicated position provided by a position indicator based upon at least two detected induction voltages (S3), a direction for selecting and scanning of the loop coils is alternatively changed (S5, 6), and the coordinate values are averaged to eliminate the residual induction voltage effect (S8).
摘要翻译：本发明提供了一种用于检测位置而不产生由谐振电路的剩余感应电压引起的差异的方法和装置，其中包括用于选择和扫描彼此平行定位的多环线圈中的一个朝向检测方向接收的步骤电磁波（S1），并且基于至少两个检测到的感应电压（S3）计算由位置指示器提供的指示位置的坐标值，交替地改变用于选择和扫描环形线圈的方向（S5,6），并且平均坐标值以消除残留感应电压效应（S8）。

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