Absolute position determining system using free stylus
    3.
    发明授权
    Absolute position determining system using free stylus 失效
    绝对位置确定系统使用免费手写笔

    公开(公告)号:US3904822A

    公开(公告)日:1975-09-09

    申请号:US45365974

    申请日:1974-03-21

    Applicant: BENDIX CORP

    CPC classification number: G06F3/046

    Abstract: A system for digitizing and recording graphic data such as lines and curves from a work sheet by tracing the data with a pen-like stylus. Orthogonal conductor grids in a tablet over which the work sheet is placed are energized with time spaced current pulses. An impulse train is generated by a coil mounted in the stylus. When the stylus impulse envelope passes through a threshold value between two opposite polarity peaks, a strobe pulse is generated to sample a reference counter. The count is a digital indication of stylus end point position and is substantially insensitive to stylus tilt.

    Abstract translation: 通过用笔状触针追踪数据,从工作表数字化和记录图形数据(如线条和曲线)的系统。 放置工作薄片的平板电脑中的正交导体栅格被时间间隔的电流脉冲激励。 由安装在触笔上的线圈产生脉冲串。 当触针脉冲包络通过两个相反极性峰值之间的阈值时,产生选通脉冲以对参考计数器进行采样。 计数是触笔终点位置的数字指示,对触针倾斜度基本不敏感。

Patent Agency Ranking