Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
2006-10-03
2006-10-03
Chang, Kent (Department: 2675)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C178S018040, C178S018020
Reexamination Certificate
active
07116315
ABSTRACT:
A method, computer readable medium, and touch sensor system for reducing the effects of contaminants on an acoustic touch sensor. Acoustic energy is transmitted across the touch sensor substrate. Any perturbations in the acoustic energy induced by environmental events, such as valid touches or contaminants, are sensed and analyzed. If the perturbation exhibits a monotonic growth over a time period, it is considered to be a valid touch. If the perturbation exhibits a non-monotonic growth over the time period, it is considered a contaminant.
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International Search Report for International Application No. PCT/US2004/007776, mailed Oct. 15, 2004.
Armstrong Helen E. N.
Dews Chris
Sharp Jeffrey L.
Chang Kent
Tyco Electronics Corporation
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