发明名称 |
Capacitive keyboard for data processing equipments |
摘要 |
In a capacitive keyboard using a polarized dielectric commonly called an electret, the keys are organized according to a matrix by rows and columns, the signals generated on the column conductors being of opposite polarity with respect to those generated on the row conductors. The movable armatures of the variable capacitors of the keys also act as bridging elements to allow the crossing of the row and column conductors and as snap elements.
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申请公布号 |
US4234871(A) |
申请公布日期 |
1980.11.18 |
申请号 |
US19780913217 |
申请日期 |
1978.06.06 |
申请人 |
ING. C. OLIVETTI & C., S.P.A. |
发明人 |
GUGLIELMI, NICOLO;DAGNA, GIANDOMENICO;VISENTIN, BRUNO |
分类号 |
G06F3/033;G06F3/044;H03K17/98;(IPC1-7):G06F3/02;G08C9/02 |
主分类号 |
G06F3/033 |
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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