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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0324438 (1994-10-17) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 1268 인용 특허 : 0 |
A proximity sensor system includes a touch-sensor pad with a sensor matrix array having a characteristic capacitance on horizontal and vertical conductors connected to sensor pads. The capacitance changes as a function of the proximity of an object or objects to the sensor matrix. The change in capa
A proximity sensor system includes a touch-sensor pad with a sensor matrix array having a characteristic capacitance on horizontal and vertical conductors connected to sensor pads. The capacitance changes as a function of the proximity of an object or objects to the sensor matrix. The change in capacitance of each node in both the X and Y directions of the matrix due to the approach of an object is converted to a set of voltages in the X and Y directions. These voltages are processed by circuitry to develop electrical signals representative of the centroid of the profile of the object, i.e, its position in the X and Y dimensions. Noise reduction and background level setting techniques inherently available in the architecture are employed. A conductive paintbrush-type stylus is used to produce paint-like strokes on a display associated with the touch-sensor pad.
A conductive paintbrush stylus for use with a capacitive touch sensor pad comprising: an electrically conductive handle; a plurality of electrically conductive bristles affixed to said handle; wherein the total resistance of said handle and said bristles is no more than the skin resistance of a huma
A conductive paintbrush stylus for use with a capacitive touch sensor pad comprising: an electrically conductive handle; a plurality of electrically conductive bristles affixed to said handle; wherein the total resistance of said handle and said bristles is no more than the skin resistance of a human finger.
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