COORDINATE CALCULATING METHOD AND TOUCH MODULE FOR SINGLE-LAYER CAPACITIVE TOUCH DEVICE

摘要

A coordinate calculating method includes acquiring a plurality of first end capacitances and a plurality of second end capacitances corresponding to a plurality of sensing channels of a single-layer capacitive touch device. Differences between the plurality of first end capacitances and a plurality of first baselines are calculated for acquiring a plurality of first differences and calculating differences between the plurality of second end capacitances and a plurality of second baselines for acquiring a plurality of second differences The first difference and the second difference of each sensing channel are added for acquiring a plurality of total capacitances. Whether the single-layer capacitive touch device is pressed is determined according to the plurality of total capacitances and a threshold. A coordinate of at least one touch point is outputted when determining the single-layer capacitive touch device is pressed.

主权项

1. A coordinate calculating method for a single-layer capacitive touch device having a plurality of sensing channels, wherein each sensing channel corresponds to at least one sensing pad pair, a first end and a second end, the coordinate calculating method comprising:
acquiring a plurality of first end capacitances and a plurality of second end capacitances corresponding to the plurality of sensing channels; calculating differences between the plurality of first end capacitances and a plurality of first baselines for acquiring a plurality of first differences and calculating differences between the plurality of second end capacitances and a plurality of second baselines for acquiring a plurality of second differences; adding the first difference and the second difference corresponding to each sensing channel, for acquiring a plurality of total capacitances; and determining whether the single-layer capacitive touch device is pressed according to the plurality of total capacitances and a threshold, and outputting coordinate of at least one touch point when the single-layer capacitive touch device is pressed.