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公开(公告)号：US4764885A
公开(公告)日：1988-08-16
申请号：US856627
申请日：1986-04-25
CPC分类号： G06F3/0418 , G06F3/03545 , G06F3/038 , G06F3/041
摘要： A minimum parallax stylus detection subsystem is disclosed for use with a graphic input grid overlay which is positioned on the viewing surface of a display device. The invention has a three phase operation wherein, during the first phase, the stylus is at a remote distance from the viewing surface of the display and therefore no representation of the stylus position is displayed. During a second phase, the stylus is brought within a first threshold distance from the viewing surface of the display, during which a cursor image is generated which is precisely positioned on the display corresponding to the detected position of the stylus. During a third phase of operation of the invention, the stylus is brought within a close proximity of the viewing surface of the display, during which the cursor image is removed from the display and an actual trace of the path of the stylus with respect to the graphic input grid overlay is shown. In this manner, the operator can focus attention on the displayed location of the cursor instead of on the physical location of the stylus, thereby minimizing the parallax error in the location of the stylus with respect to the displayed image.
摘要翻译： 公开了一种用于与位于显示装置的观察表面上的图形输入网格覆盖层一起使用的最小视差触笔检测子系统。 本发明具有三相操作，其中在第一阶段期间，触针距显示器的观察表面处于远离距离，因此不显示触针位置的表示。 在第二阶段期间，将触控笔置于与显示器的观察表面之间的第一阈值距离内，在该第一阈值距离内，生成精确定位在显示器上的光标图像，该显示器对应于检测到的触控笔的位置。 在本发明的第三操作阶段期间，将触针置于显示器的观察表面附近，在此期间将光标图像从显示器移除，并且触控笔的路径相对于显示器的实际轨迹 显示图形输入网格覆盖图。 以这种方式，操作者可以将注意力集中在光标的显示位置，而不是在触控笔的物理位置上，从而最小化触针相对于显示图像的位置的视差误差。
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公开(公告)号：US4803720A
公开(公告)日：1989-02-07
申请号：US910055
申请日：1986-09-22
摘要： The invention is a software reconfigurable cross point switch which selectively interconnects a plurality of phone lines and a plurality of shared resources such as call progress monitors, dual tone multifrequency (DTMF) receivers, DTMF automatic dialers and automatic answer tone detectors. The invention achieves its objective of enhanced switching efficiency and greater flexibility in the connectivity between diverse communications elements, by independently switching two separate switching planes of the cross point switch so as to enable different paths to be taken by the transmit portion and the receive portion of a particular telephone connection.The cross point switch architecture invention flexibly allows for many applications, one in particular being conference summing. By providing a plurality of build-out resistors connected to the separate inputs of one plane of the cross point switch, and connecting the corresponding outputs from the cross point switch to a single input of the summing amplifier, a conference summing function can be performed.
摘要翻译： 本发明是一种软件可重配置交叉点交换机，其选择性地互连多个电话线和多个共享资源，例如呼叫进程监视器，双音多频（DTMF）接收机，DTMF自动拨号器和自动应答音检测器。 本发明通过独立地切换交叉点开关的两个单独的开关平面来实现提高开关效率和在不同通信元件之间的连接性方面的更大的灵活性，以便使发送部分和接收部分的接收部分能够采取不同的路径 一个特定的电话连接。 交叉点开关架构发明灵活地允许许多应用，特别是会议求和。 通过提供连接到交叉点开关的一个平面的单独输入端的多个积分电阻器，并且将来自交叉点开关的相应输出连接到求和放大器的单个输入端，可以执行会议求和功能。
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公开(公告)号：US4723268A
公开(公告)日：1988-02-02
申请号：US910117
申请日：1986-09-22
CPC分类号： H04M11/06 , H04M15/00 , Y10S379/902
摘要： The invention includes a first switch and a second switch serially connected between a telephone network line and a local telephone line which can be selectively connected to alternately either an auto answer modem or a human answer telephone set. A control register is associated with the local telephone line, having data contents representing whether the local telephone line is connected to the auto answer modem or alternately to the human answer telephone set. A billing delay element has an output connected to a control input of the first switch, for delaying the closure of the first switch for a predetermined interval after an answer tone is received over the telephone network line when the control register, which is connected to the control input of the first switch, indicates that the auto answer modem is connected to the local telephone line. A tone overload detector has an input connected to the local telephone line and an output connected to the control input of the first switch, for interrupting the connection between the local telephone line and the telephone network line if tones generated on the local telephone line have a voltage greater than a predetermined amplitude when the control register, indicates that the auto answer modem is connected to the local telephone line. The control register controls the closure of the first switch when the contents of the register indicate that the local telephone line is connected to the human answer telephone set. In this manner, either the auto answer data operations or alternately the human voice signals can be selectively transmitted.
摘要翻译： 本发明包括串行连接在电话网络线路和本地电话线路之间的第一交换机和第二交换机，其可以选择性地连接到自动应答调制解调器或人类应答电话机。 控制寄存器与本地电话线路相关联，具有表示本地电话线路是连接到自动应答调制解调器还是交替地连接到人体应答电话机的数据内容。 计费延迟元件具有连接到第一开关的控制输入的输出，用于在连接到第一开关的控制寄存器上的控制寄存器在通过电话网络线路接收到应答音频之后延迟第一开关的闭合预定间隔 指示第一交换机的控制输入，指示自动应答调制解调器连接到本地电话线路。 音调过载检测器具有连接到本地电话线路的输入端和连接到第一交换机的控制输入端的输出端，用于在本地电话线路上生成的音调具有本地电话线路上的音调时中断本地电话线路与电话网络线路之间的连接 当控制寄存器指示自动应答调制解调器连接到本地电话线路时，电压大于预定幅度。 当寄存器的内容指示本地电话线连接到人体应答电话机时，控制寄存器控制第一开关的闭合。 以这种方式，可以选择性地发送自动应答数据操作或者交替地人类语音信号。
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