| 摘要 |
<p>A system comprising a conductive stylus (32) used in conjunction with a capacitance sensitive touch pad (30), said system providing at least two different signals to an associated computer system (34). The stylus (32) is a pen-like device having an actuable switch which when actuated substantially increases the capacitive disturbance caused by the conductive stylus (32) on the touch pad (30). Before actuation, the stylus (32) creates a capacitive disturbance sufficient for circuitry in the touch pad (30) to measure as crossing a first predefined capacitive disturbance threshold when the foam (60) covered conductive stylus tip (40) is brought in contact with the surface of the touch pad (30), allowing the user to place a cursor on the display. When the switch is actuated, the capacitive disturbance measured by the touch pad (30) increases sufficient to cross a second predefined capacitive disturbance threshold, allowing the user to draw on the display.</p> |
