Method for calibrating coordinates of touch screen

Details Method for calibrating coordinates of touch screen Method for calibrating coordinates of touch screen

2011-08-02

2011-08-02

Nguyen, Kevin M (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C345S173000

Reexamination Certificate

active

07990368

ABSTRACT:
A method for calibrating coordinates of a touch screen includes the steps of: providing a display panel, which includes display coordinates along a first axis and a first axis display coordinate; providing a capacitive sensor, which includes sensing electrodes disposed along the first axis and respectively corresponding to sensing coordinates, wherein capacitive sensor has a maximum sensing coordinate; detecting digital values corresponding to the sensing electrodes when the capacitive sensor is touched; multiplying the digital values by the sensing coordinates corresponding to the sensing electrodes to obtain a weighting value; dividing the weighting value by the maximum sensing coordinate to obtain an interpolated value; and multiplying the interpolated value by the first axis display coordinate to obtain a calibrated coordinate.

REFERENCES:
patent: 6456952 (2002-09-01), Nathan

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