Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
2005-12-20
2005-12-20
Shankar, Vijay (Department: 2673)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C345S174000, C345S175000, C345S176000, C345S177000, C345S178000, C345S179000
Reexamination Certificate
active
06977646
ABSTRACT:
Disclosed is a touch screen calibration system and method that applies a signal to a the terminals of a touch screen and applies a calibration impedance to those terminals; the effect of the calibration impedance applied to the terminals is sensed; the X, Y position for each terminal is calculated upon application of the calibration impedance and the offset error for each terminal is calculated and applied to obtain the corrected touch position for a measured touch position; in addition the gain error may be calculated for each terminal and applied to obtain the corrected touch position.
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Hares Luke David Ronald
Hauck Karl P.
3M Innovative Properties Co.
Dharia Prabodh
Pechman Robert J.
Shankar Vijay
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