DETECTION OF A NUMBER OF TOUCH CONTACTS OF A MULTI-TOUCH INPUT
First Claim
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1. A system for determining touch contact locations, comprising:
- a communication interface configured to receive a signal that has been disturbed by touch contacts of a touch input on a surface; and
a processor coupled with the communication interface and configured to;
transform the received signal to determine a spatial domain signal;
compare the spatial domain signal with an expected signal associated with potential locations of sources of disturbances caused by the touch contacts; and
determine the locations of the touch contacts of the touch input based at least in part on the comparison.
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Abstract
Determining touch contact locations is disclosed. A signal that has been disturbed by touch contacts of a touch input on a surface is received. The received signal is transformed to determine a spatial domain signal. The spatial domain signal is compared with an expected signal associated with potential locations of sources of disturbances caused by the touch contacts. The locations of the touch contacts of the touch input are determined based at least in part on the comparison.
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20 Claims
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1. A system for determining touch contact locations, comprising:
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a communication interface configured to receive a signal that has been disturbed by touch contacts of a touch input on a surface; and a processor coupled with the communication interface and configured to; transform the received signal to determine a spatial domain signal; compare the spatial domain signal with an expected signal associated with potential locations of sources of disturbances caused by the touch contacts; and determine the locations of the touch contacts of the touch input based at least in part on the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for determining touch contact locations, comprising:
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receiving a signal that has been disturbed by touch contacts of a touch input on a surface; transforming the received signal to determine a spatial domain signal; using a processor to compare the spatial domain signal with an expected signal associated with potential locations of sources of disturbances caused by the touch contacts; and determining the locations of the touch contacts of the touch input based at least in part on the comparison.
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20. A computer program product for determining touch contact locations, the computer program product being embodied in a tangible computer readable storage medium and comprising computer instructions for:
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receiving a signal that has been disturbed by touch contacts of a touch input on a surface; transforming the received signal to determine a spatial domain signal; comparing the spatial domain signal with an expected signal associated with potential locations of sources of disturbances caused by the touch contacts; and determining the locations of the touch contacts of the touch input based at least in part on the comparison.
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Specification