| 摘要 |
A touch device uses pre-touch sensing to enhance touch location determination and/or to activate various processes. Pre-touch signals are generated by one or more pre-touch sensors (222,224,226,228) responsive to a touch implement hovering above the touch surface (272) . The pre-touch signals indicate a pre-touch location of the touch implement. One or more touch sensors (232,234,236,238) generate touch signals responsive to a touch by the touch implement on the touch surface (272) . The touch signals indicate a touch location of the touch implement. A controller (250) determines a touch location based on the pre-touch signals and the touch signals. Activation and/or deactivation of various processes may be triggered based on information acquired from the pre-touch and/or touch sensors . |
