MULTIPLE FINGERS TOUCH SENSING METHOD USING MATCHING ALGORITHM
First Claim
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1. A touch sensing method for detecting touching to a touch sensor, the method comprising:
- providing a reference touch profile indicating an ideal touch;
extracting a sensing signal from the touch sensor;
matching the reference touch profile with the sensing signal to find an optimal result by moving the reference touch profile; and
identifying a position of touching from the reference touch profile in correspondence to the optimal result.
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Abstract
A touch sensing method for detecting positions of touching is disclosed. In the present invention, a reference touch profile is provided. A variable ideal combination profile indicating multiple touches is obtained by synthesizing a plurality of reference touch profiles at different positions. The variable ideal combination profile is matched with a sensing signal. Actual touch positions can be identified from the sensing signal when the matching of the variable ideal combination profile with the sensing signal is optimal.
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Citations
22 Claims
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1. A touch sensing method for detecting touching to a touch sensor, the method comprising:
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providing a reference touch profile indicating an ideal touch; extracting a sensing signal from the touch sensor; matching the reference touch profile with the sensing signal to find an optimal result by moving the reference touch profile; and identifying a position of touching from the reference touch profile in correspondence to the optimal result. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A touch sensing method for detecting multiple touches to a touch sensor, the method comprising:
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providing a reference touch profile indicating an ideal touch; extracting a sensing signal from the touch sensor; synthesizing a plurality of the reference touch profiles to compose an ideal combination profile; matching the ideal combination profile with the sensing signal by changing positions of centroids of the reference touch profiles composing the ideal combination profile so as to find an optimal result; and identifying positions of touching from the ideal combination profile in correspondence to the optimal result. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A touch sensing method for detecting touching to a touch sensor, the method comprising:
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extracting a sensing signal from the touch sensor; identifying a touch region from the sensing signal, at least one touch occurring in the touch region; identifying how many touches has occurred in the touch region; matching the reference touch profile with the sensing signal to find an optimal result by moving the reference touch profile when it is determined that there is only one touch in the touch region while synthesizing a plurality of the reference touch profiles to compose an ideal combination profile and matching the ideal combination profile with the sensing signal by changing positions of centroids of the reference touch profiles composing the ideal combination profile so as to find the optimal result when it is determined that there are plural of touches in the touch region; and identifying a position or positions of touching from the reference touch profile or the ideal combination profile in correspondence to the optimal result.
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Specification