Pressure-responsive position sensor
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United States of America Patent
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-
Feb 17, 1987
Grant Date -
N/A
app pub date -
Dec 11, 1985
filing date -
Dec 11, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Electrical signals are produced by a pressure-responsive device, such signals being indicative of the position of locally applied pressure. The device comprises a position sensor assembly which comprises a composite layer medium including electrically conductive magnetic particles in a nonconductive matrix material. The particles are aligned into chains extending across the thickness of the layer, and chains include a non-conductive gap which is bridged upon application of sufficient pressure. The medium is sandwiched between sheet electrodes, and the resulting assembly may be transparent as is advantageous in writing pad and touch-sensitive screen applications. The pressure-responsive device is suitable, e.g., as an input device in graphics information systems, in combination with transmission and display facilities.
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