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公开(公告)号：US4533987A
公开(公告)日：1985-08-06
申请号：US440425
申请日：1982-11-09
申请人： Yoshiaki Tomofuji , Takayoshi Maeda
发明人： Yoshiaki Tomofuji , Takayoshi Maeda
摘要： A power supply system is disclosed in which each of the phases of a three phase AC source are rectified and inverted. During inversion high frequency signals are obtained corresponding to the phases of the AC source which are synchronized so that their zero cross points occur at the same time. The high frequency signals are superposed in series to produce an output signal for a load which has a constant power and diminished current distortion.
摘要翻译： 公开了一种电源系统，其中三相AC电源的每个相位被整流和反相。 在反转期间，与同步的交流电源的相位相应地获得高频信号，使得它们的零交叉点同时出现。 高频信号被串联叠加以产生具有恒定功率和减小的电流失真的负载的输出信号。
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公开(公告)号：US4832144A
公开(公告)日：1989-05-23
申请号：US197468
申请日：1988-05-23
摘要： A position detector comprising a plurality of magnetostriction propagating media extending substantially in parallel with one another and having first coils wound about the media at respective first ends thereof and second coils wound around the media over respective lengths thereof. A current pulse is applied to each of the first coils to generate magnetostrictive oscillation waves in the regions of the mediae around which the first coils are wound. The waves propagate through the media and cause an induced voltage to be generated in the respective second coils at the position where position indicators generate a steady magnetic field. The position of the position indicators is determined by measuring the time that elapses between generating the oscillating waves and receiving the induced voltages. Adjacent two of the plurality of magnetotriction propagating media are respectively paired and each of the magnetostriction propagating media of the respective pairs are individually wound with first coils that are connected together and second coils that are connected together so as to generate a magnetostrictive oscillating wave in the respective pairs. The plurality of magnetositriction propagating media may be evenly spaced or may be irregularly arranged with media that separate pairs being closer together than the media that comprise a pair. In one embodiment the current pulse is applied to the second coils to generate magnetostrictive oscillation waves at the position of the position indicators. In this embodiment the waves propagate through the mediae and cause an induced voltage to be generated in the respective first coil.
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公开(公告)号：US4711977A
公开(公告)日：1987-12-08
申请号：US001740
申请日：1987-01-09
IPC分类号： G06F3/033 , G06F3/0354 , G06F3/041 , G06F3/0488 , G08C21/00
CPC分类号： G06F3/041 , G06F3/033 , G06F3/03545 , G06F3/0488
摘要： An electronic blackboard apparatus comprises an electronic blackboard unit, a writing instrument, a position-detecting control unit, and an output section. When video information such as characters and figures is depicted on a writing surface by means of the writing instrument, a magnetic bias with a locus corresponding to the video information is simultaneously applied to a position-detecting tablet of the electronic blackboard unit. Position coordinates thereof are computed by the position-detecting control unit and converted into electric signals. Similarly, when the video information on the writing surface is erased by means of the eraser, a magnetic bias with a locus corresponding to the erased video informaton is simultaneously applied to the position-detecting tablet. Position coordinates thereof are calculated by the position-detecting control unit and converted into electric signals. On the basis of these electric signals, the video information on the writing surface is output from the output section as a hard-copy image or as a display image.
摘要翻译： 电子黑板装置包括电子黑板单元，书写工具，位置检测控制单元和输出部分。 当通过书写工具在书写表面上描绘诸如字符和图形的视频信息时，具有与视频信息相对应的轨迹的磁偏置同时应用于电子黑板单元的位置检测图形输入板。 其位置坐标由位置检测控制单元计算并转换为电信号。 类似地，当通过橡皮擦擦除写入表面上的视频信息时，将与擦除的视频信息相对应的轨迹的磁偏置同时施加到位置检测图形输入板。 其位置坐标由位置检测控制单元计算并转换为电信号。 基于这些电信号，写入表面上的视频信息作为硬拷贝图像或显示图像从输出部分输出。
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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
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。
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公开(公告)号：US5134388A
公开(公告)日：1992-07-28
申请号：US690317
申请日：1991-04-25
申请人： Azuma Murakami , Tsuguya Yamanami , Toshiaki Senda , Yoshiaki Tomofuji , Satoshi Inashima , Hiroshi Mizuno
发明人： Azuma Murakami , Tsuguya Yamanami , Toshiaki Senda , Yoshiaki Tomofuji , Satoshi Inashima , Hiroshi Mizuno
摘要： A determination is made as to which one of plural objects is proximate a region having a coil therein. Each object includes a tuned circuit having a different resonant frequency. AC energy at the different resonant frequencies is supplied to the coil. The tuned circuit on the particular object in the region having substantially the same resonant frequency as the AC energy supplied to the coil causes a change in the current flowing in the coil at the same resonant frequency. The change in the current flowing in the coil at the same resonant frequency is sensed. In response to the current change at the same resonant frequency the particular object having the tuned circuit with the same resonant frequency as the frequency of the applied AC energy is indicated with a phase detector arrangement responsive to the changed current flowing in the coil at the same resonant frequency and a reference wave at the same resonant frequency. The phase detector arrangement derives indications of the polarities of the phase of quadrature components of the changed current relative to the reference wave and indicates the durations of the polarities relative to predetermined values therefor.
摘要翻译： 确定多个物体中的哪一个靠近其中具有线圈的区域。 每个物体包括具有不同谐振频率的调谐电路。 将不同谐振频率的交流能量提供给线圈。 在具有与提供给线圈的AC能量基本相同的谐振频率的区域中的特定物体上的调谐电路导致在相同共振频率下在线圈中流动的电流的变化。 感测到以相同谐振频率在线圈中流动的电流的变化。 响应于在相同共振频率下的电流变化，具有与所施加的AC能量的频率具有相同谐振频率的调谐电路的特定对象由相位检测器装置指示，该相位检测器布置响应于在线圈中流过的变化的电流 谐振频率和相同谐振频率下的参考波。 相位检测器装置导出相对于参考波的改变的电流的正交分量的相位的极性的指示，并且指示相对于其预定值的极性的持续时间。
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公开(公告)号：USRE33936E
公开(公告)日：1992-05-26
申请号：US448041
申请日：1989-12-08
IPC分类号： G06F3/033 , G06F3/0354 , G06F3/041 , G06F3/0488
CPC分类号： G06F3/041 , G06F3/033 , G06F3/03545 , G06F3/0488
摘要： An electronic blackboard apparatus comprises an electronic blackboard unit, a writing instrument, a position-detecting control unit, and an output section. When video information such as characters and figures is depicted on a writing surface by means of the writing instrument, a magnetic bias with a locus corresponding to the video information is simultaneously applied to a position-detecting tablet of the electronic blackboard unit. Position coordinates thereof are computed by the position-detecting control unit and converted into electric signals. Similarly, when the video information on the writing surface is erased by means of the eraser, a magnetic bias with a locus corresponding to the erased video information is simultaneously applied to the position-detecting tablet. Position coordinates thereof are calculated by the position-detecting control unit and converted into electric signals. On the basis of these electric signals, the video information on the writing surface is output from the output section as a hard-copy image or as a display image.
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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
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.
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