Paintbrush stylus for capacitive touch sensor pad
AssigneeSynaptics Incorporated
InventorsCarver A. Mead, Ralph Wolf, Timothy P. Allen
Life of this patent
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AssigneeSynaptics Incorporated
InventorsCarver A. Mead, Ralph Wolf, Timothy P. Allen
Estimating the term…
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:
A conductive paintbrush stylus for use with a touch sensor pad having a characteristic capacitance, said paintbrush comprising:
A conductive paintbrush stylus for use with a touch sensor pad having a characteristic capacitance, said paintbrush comprising:
Dependencies are inferred from the claim text.