摘要 |
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. |
申请人 |
AMERICAN TELEPHONE AND TELEGRAPH CO., NEW YORK, N.Y., US |
发明人 |
JIN, SUNGHO, MILLINGTON NEW JERSEY 07946, US;MOTTINE, JR., JOHN JOSEPH, WEST KEANSBURG NEW JERSEY 07734, US;SHERWOOD, RICHARD CURRY, NEW PROVIDENCE NEW JERSEY 07974, US;TIEFEL, THOMAS HENRY, PISCATAWAY NEW JERSEY 08854, US |