发明名称 |
EINGABEVORRICHTUNG FUER EINE RECHNERGESTEUERTE OPTISCHE DARSTELLUNGSEINRICHTUNG |
摘要 |
An input device for a computer controlled visual display enables an operator to instruct the shift of a display element in a chosen direction by hand movement of the input device sensor in an analogous direction over a plane surface. The sensor includes a conventional piezoelectric audio pick-up which produces a succession of unidirectional pulses when the stylus is drawn across a microscopically textured surface such as a sheet of paper, the polarity of the pulses being indicative of the direction of motion along a selected axis. A second pick-up is arranged to give a maximum response to motion along an orthogonal axis and for the component of motion on each axis a bi-directional pulse counter enables the direction of motion to be determined by a comparison of the counts held in successive time intervals. |
申请公布号 |
DE2908590(A1) |
申请公布日期 |
1979.09.20 |
申请号 |
DE19792908590 |
申请日期 |
1979.03.05 |
申请人 |
NATIONAL RESEARCH DEVELOPMENT CORP. |
发明人 |
PAGE,IAN |
分类号 |
G06F3/023;G06F3/033;G06F3/038;G06F3/041;(IPC1-7):G06F3/00;G06K15/20;G11B3/00;G09F9/00 |
主分类号 |
G06F3/023 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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