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    Combined finger touch and stylus detection system for a display device
    41.
    发明专利
    Combined finger touch and stylus detection system for a display device 未知

    公开(公告)号：SG148194G

    公开(公告)日：1995-03-17

    申请号：SG148194

    申请日：1994-10-13

    Applicant: IBM

    Inventor： GREANIAS EVON C ,  GUARNIERI C RICHARD ,  SEELAND JOHN J ,  VERRIER GUY F

    IPC: G06F3/041 ,  G06F3/033 ,  G06F3/044 ,  G06F3/046 ,  G06F3/048 ,  G06K11/06

    Abstract: A combined finger touch and stylus detection system is disclosed for use on the viewing surface of the visual display device. Transparent conductors (X1, X2,...X112) arranged in horizontal and vertical grid are supported on a flexible, transparent overlay membrane (20) which is adaptable to a variety of displays. A unique interconnection pattern is provided between the transparent conductors in the array and buses (80,90) which interconnect the conductors with the supporting electronics, whereby a minimum number of bus wires can be employed to service the array conductors and yet both unique finger touch location sensing and unique stylus location sensing can be accomplished. The system includes a control processor (100) which operates on stored program instructions which, in a first embodiment provides for the alternate detection of either finger touch location or stylus location and, in a second embodiment, provides for the simultaneous detection of both finger touch location and stylus location. The resulting system provides the unique function of combined finger touch and stylus detection, is adaptable to a variety of display surfaces, is provided with a structure which is easily manufacturable, and which has an inherent long-term reliability.

    42.
    发明专利
    未知

    公开(公告)号：DE3781580D1

    公开(公告)日：1992-10-15

    申请号：DE3781580

    申请日：1987-03-20

    Applicant: IBM

    Inventor： GREANIAS EVON C ,  SCHROEDER KARL F ,  RUFFINO LOUIS V

    IPC: G06F3/153 ,  G06F3/033 ,  G06F3/038 ,  G06F3/041 ,  G06F3/048 ,  G06K11/10

    Abstract: 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.

    48.
    发明专利
    未知

    公开(公告)号：DE3782860D1

    公开(公告)日：1993-01-14

    申请号：DE3782860

    申请日：1987-06-05

    Applicant: IBM

    Inventor： DONALDSON ROBERT L ,  VERRIER GUY F ,  SEELAND JR ,  GUARNIERI C RICHARD ,  GREANIAS EVON C

    IPC: G06F3/041 ,  G06F3/033 ,  G06F3/044 ,  G06F3/046 ,  G06F3/048 ,  G06K11/10

    Abstract: A combined finger touch and stylus detection system is disclosed for use on the viewing surface of the visual display device. Transparent conductors (X1, X2,...X112) arranged in horizontal and vertical grid are supported on a flexible, transparent overlay membrane (20) which is adaptable to a variety of displays. A unique interconnection pattern is provided between the transparent conductors in the array and buses (80,90) which interconnect the conductors with the supporting electronics, whereby a minimum number of bus wires can be employed to service the array conductors and yet both unique finger touch location sensing and unique stylus location sensing can be accomplished. The system includes a control processor (100) which operates on stored program instructions which, in a first embodiment provides for the alternate detection of either finger touch location or stylus location and, in a second embodiment, provides for the simultaneous detection of both finger touch location and stylus location. The resulting system provides the unique function of combined finger touch and stylus detection, is adaptable to a variety of display surfaces, is provided with a structure which is easily manufacturable, and which has an inherent long-term reliability.

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