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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0914043 (1992-07-13) |
| 발명자 / 주소 |
|
| 인용정보 | 피인용 횟수 : 568 인용 특허 : 0 |
Methods and apparatus for data input. Devices are provided in accordance with this invention which utilize capacitive coupling of an object to the device to sense the object\s position. The devices are comprised of a plurality of electrode strips which form virtual electrodes. The virtual electrodes
Methods and apparatus for data input. Devices are provided in accordance with this invention which utilize capacitive coupling of an object to the device to sense the object\s position. The devices are comprised of a plurality of electrode strips which form virtual electrodes. The virtual electrodes are selectively connected to form virtual dipole electrodes which are responsive to the object\s position.
Apparatus for data input through sensing the position of a passive object relative to the apparatus comprising: pad means for sensing the object\s position, the pad means having a plurality of first electrode strips spaced apart in a first array, one or more second electrode strips disposed in proxi
Apparatus for data input through sensing the position of a passive object relative to the apparatus comprising: pad means for sensing the object\s position, the pad means having a plurality of first electrode strips spaced apart in a first array, one or more second electrode strips disposed in proximity to the first electrode strips to cross thereover for establishing electric fields, including fringe electric fields, between the second electrode strip and selected first electrode strips, to thereby develop capacitive balances in the pad means, wherein the object perturbs a fringe electric field when the object comes in proximity to the pad means, thereby changing the capacitive balances; and measurement means operatively coupled to the pad means for measuring the capacitive balances in the pad means to thereby determine the position of the object relative to the pad means, said measurement means including synthesis means responsive to control signals for selecting first electrode strips which, along with the second electrode strip, will develop electric fields, control means for supplying control signals to the synthesis means to designate the selected first electrode strips, means for causing development of electric fields between the selected first electrode strips and the second electrode strip, and means for detecting the changes in capacitive balances in the pad means and the locations of such changes.
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