CALIBRATION OF FORCE BASED TOUCH PANEL SYSTEMS
First Claim
1. A method for calibrating a touch screen, comprising:
- applying mechanical distortion to the touch screen;
detecting a force responsive touch signal arising from the mechanical distortion of the touch screen;
characterizing a touch signal error associated with the mechanical distortion; and
producing calibration parameters using the characterization of the touch signal error.
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Abstract
A method and system are provided to correct inaccuracies in touch location determination associated with mechanical distortion of the touch screen. Calibration parameters are provided for a touch screen characterizing an error in an expected touch signal associated with mechanical distortion of the touch screen. A force responsive touch signal having the error is detected and the touch location determined using the calibration parameters to correct the error in the touch signal. The calibration parameters are determined by applying mechanical distortion to the touch screen and characterizing the touch signal error associated with the mechanical distortion. The calibration parameters are produced using the characterization of the touch signal error.
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Citations
28 Claims
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1. A method for calibrating a touch screen, comprising:
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applying mechanical distortion to the touch screen;
detecting a force responsive touch signal arising from the mechanical distortion of the touch screen;
characterizing a touch signal error associated with the mechanical distortion; and
producing calibration parameters using the characterization of the touch signal error. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A touch screen calibration system, comprising:
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a mechanical distortion system for applying mechanical distortion to the touch screen;
a detection system for detecting force responsive sensor signals arising from the mechanical distortion; and
a processor, coupled to the detection system, and receiving the sensor signals detected by the detection system, the processor configured to detect a force responsive touch signal arising from the mechanical distortion of the touch screen, characterize a touch signal error associated with the mechanical distortion of the touch screen, and produce calibration parameters using the characterization of the touch signal error. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A system for calibrating a touch screen, comprising:
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means for applying mechanical distortion to the touch screen;
means for detecting sensor signals associated with the mechanical distortion; and
means for calibrating the touch screen to compensate for the mechanical distortion. - View Dependent Claims (23, 24, 25, 26, 27)
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28. A computer-readable medium configured with executable instructions for causing one or more computers to perform a method of calibrating a touch screen, the method comprising:
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applying mechanical distortion to the touch screen;
detecting a force responsive touch signal arising from the mechanical distortion of the touch screen;
characterizing a touch signal error associated with the mechanical distortion, the touch signal error arising in a force responsive touch signal; and
producing calibration parameters using the characterization of the touch signal error.
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Specification