Power reduction of a capacitive touch system
First Claim
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1. A power saving capacitive touch system, comprising;
- a touch panel;
at least two first integrated circuits connected to the touch panel to simultaneously scan thereto, each of the first integrated circuits responsible for scanning a respective portion of the touch panel; and
a second integrated circuit connected to the first integrated circuits to receive sensed data therefrom and calculate therewith;
wherein any one of the first integrated circuits will enter a suspend mode to lower a scanning frequency thereof when it has not detected any objects on its scanning zone for a predetermined period.
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Abstract
A capacitive touch system uses at least two integrated circuits to simultaneously scan a touch panel, each of the integrated circuits scanning only a portion of the touch panel. If any one of the integrated circuits has not detected any objects on its scanning zone for a long time, it will enter a suspend mode to lower the scanning frequency thereof for power saving.
50 Citations
12 Claims
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1. A power saving capacitive touch system, comprising;
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a touch panel; at least two first integrated circuits connected to the touch panel to simultaneously scan thereto, each of the first integrated circuits responsible for scanning a respective portion of the touch panel; and a second integrated circuit connected to the first integrated circuits to receive sensed data therefrom and calculate therewith; wherein any one of the first integrated circuits will enter a suspend mode to lower a scanning frequency thereof when it has not detected any objects on its scanning zone for a predetermined period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A power saving method for a capacitive touch system including a touch panel simultaneously scanned by at least two first integrated circuits, and a second integrated circuit to receive sensed data from the first integrated circuits and calculate therewith, the method comprising:
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each of the first integrated circuits scanning its responsible scanning zone at a high frequency when an object is detected thereon; and if any one of the first integrated circuits has not detected any objects on its scanning zone for a predetermined period, it lowering its scanning frequency for power saving. - View Dependent Claims (10, 11, 12)
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Specification