Method and system for calibrating an acoustic touchscreen
First Claim
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1. A method for calibrating an Acoustic Pulse Recognition (APR) touch substrate having a plurality of microphones mounted thereon, comprising:
- touching an APR touch substrate at N comparison touch points;
acquiring N audio profiles, each of the N audio profiles being associated with one of the N comparison touch points; and
selecting a predetermined calibration file from within a plurality of predetermined calibration files, said selecting being based on the N audio profiles, the predetermined calibration file comprising audio profiles associated with coordinate locations on the touch substrate, wherein each of said plurality of predetermined calibration files is based on a group of similar calibration files acquired from APR touch substrates other than said APR touch substrate.
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Abstract
A method for calibrating an Acoustic Pulse Recognition (APR) touchscreen comprises touching an APR touchscreen at N comparison touch points. N audio profiles are acquired, and each of the N audio profiles are associated with one of the N comparison touch points. A predetermined calibration file is selected based on the N audio profiles. The predetermined calibration file comprises audio profiles associated with coordinate locations on the touchscreen.
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Citations
27 Claims
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1. A method for calibrating an Acoustic Pulse Recognition (APR) touch substrate having a plurality of microphones mounted thereon, comprising:
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touching an APR touch substrate at N comparison touch points; acquiring N audio profiles, each of the N audio profiles being associated with one of the N comparison touch points; and selecting a predetermined calibration file from within a plurality of predetermined calibration files, said selecting being based on the N audio profiles, the predetermined calibration file comprising audio profiles associated with coordinate locations on the touch substrate, wherein each of said plurality of predetermined calibration files is based on a group of similar calibration files acquired from APR touch substrates other than said APR touch substrate. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for calibrating an Acoustic Pulse Recognition (APR) touch substrate, comprising:
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the APR touch substrate; a plurality of microphones mounted to the APR touch substrate; and a processor configured to; receive N audio profiles associated with N comparison touch points, the N audio profiles representative of signals detected by the plurality of microphones; compare the N audio profiles to a plurality of sets of N pre-recorded audio profiles, each set of N pre-recorded audio profiles associated with a respective predetermined calibration file within a plurality of predetermined calibration files; and select a predetermined calibration file from the plurality of predetermined calibration files based on the comparison of the N audio profiles to the plurality of sets of N pre-recorded audio profiles, the predetermined calibration file comprising audio profiles being representative of coordinates of touch points on the APR touch substrate, wherein each of said plurality of predetermined calibration files is based on a group of similar calibration files acquired from APR touch substrates other than said APR touch substrate. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for characterizing prior to normal use with a display an Acoustic Pulse Recognition (APR) touch substrate having a plurality of microphones mounted thereon, comprising:
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acquiring calibration files, each of the calibration files being associated with a different APR touch substrate other than said APR touch substrate, each of the calibration files comprising audio profiles associated with coordinate locations on the touch substrate; sorting the calibration files into groups based on a difference threshold; and computing a predetermined calibration file for each group, each of the predetermined calibration files being representative of the calibration files within each of the groups, the predetermined calibration files being used by APR touch substrates not included within the groups. - View Dependent Claims (14, 15, 16, 17)
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18. A computer readable non-transitory medium for use in an Acoustic Pulse Recognition (APR) touch system, said system comprising an APR touch substrate having a plurality of microphones mounted thereon, comprising:
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instructions to acquire audio profiles representative of touch points on said APR touch substrate; and instructions to select a calibration file for said APR touch substrate from a plurality of predetermined calibration files, the selecting being based at least on the audio profiles, wherein each of said plurality of predetermined calibration files is based on a group of similar calibration files acquired from APR touch substrates other than said APR touch substrate. - View Dependent Claims (19, 20, 21)
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22. An Acoustic Pulse Recognition (APR) touch system, comprising:
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an APR touch substrate; a plurality of microphones mounted to the APR touch substrate; a processor configured to receive a predetermined calibration file associated with the touch substrate, the predetermined calibration file comprising audio profiles being representative of coordinates of touch points on the APR touch substrate; and a memory for storing the predetermined calibration file, the predetermined calibration file being selected from a plurality of predetermined calibration files, the selecting having been based on previous audio profiles obtained with the APR touch substrate, wherein each of the plurality of predetermined calibration files is based on a group of similar calibration files acquired from APR touch substrates other than said APR touch substrate. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification