| 摘要 |
The use of one or more proximity sensors alone or in combination with one or more touch sensors in a multi-touch panel to detect the presence of a finger, body part or other object and control or trigger one or more functions in accordance with an "image" of touch provided by the sensor outputs is disclosed. In some embodiments, one or more infrared (IR) proximity sensors can be driven with a specific stimulation frequency and emit IR light from one or more areas, which can in some embodiments correspond to "pixel" locations. The reflected IR signal, if any, can be demodulated using synchronous demodulation.
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