TOUCH PAD HAVING INTEGRATED LIGHTING FEATURE AND TOUCH SENSOR AND METHOD OF OPERATING THE SAME
First Claim
Patent Images
1. A method of determining switch activation for an integrated touch pad having a touch sensor and lighting feature, the method comprising:
- actively driving the lighting feature; and
sensing activation of the touch pad without interrupting driving of the lighting feature.
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Abstract
A touch pad having an integrated lighting feature and touch sensor and method of controlling the same. The integrating lighting feature and touch sensor having a common electrical connection. The method of controlling the same including determining activation as a function of influences on the operation of the touch sensor.
28 Citations
20 Claims
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1. A method of determining switch activation for an integrated touch pad having a touch sensor and lighting feature, the method comprising:
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actively driving the lighting feature; and
sensing activation of the touch pad without interrupting driving of the lighting feature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of determining switch activation for an integrated touch pad having a touch sensor and lighting feature, the method comprising:
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driving the lighting feature with a low frequency signal;
providing a high frequency signal to the touch sensor; and
sensing activation of the touch pad as a function a capacitance change sensed with the high frequency signal. - View Dependent Claims (10, 11, 12)
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13. A touch pad system, the touch pad system comprising:
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a lighting feature configured to emit light when driven;
a touch sensor configured to share a common electrical connection with the lighting feature such that the lighting element and touch sensor form an integrated lighting feature and touch sensor;
a logical element to determine activation as a function of signals associated with the touch sensor; and
a feature to limit interference associated with driving of the lighting feature from unduly influencing sensing activation of the touch sensor. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification