CPC G06F 3/0416 (2013.01) [G06F 3/04186 (2019.05); G06F 3/044 (2013.01); G06F 3/0446 (2019.05)] | 12 Claims |
1. A position detection circuit connected to a capacitive touch sensor formed with a plurality of line electrodes that are two-dimensionally arranged, the position detection circuit comprising:
at least one processor device; and
at least one memory device storing processor-readable instructions that, when executed by the at least one processor device, cause the position detection circuit to:
acquire two-dimensional data indicating a distribution of detection values of capacitance on the capacitive touch sensor;
in response to recognizing a foreign object on the capacitive touch sensor based on the two-dimensional data, compare the two-dimensional data with a first threshold to detect a first touch position or a first touch area on the capacitive touch sensor at which a detection value indicated by the two-dimensional data exceeds the first threshold; and
in response to not recognizing a foreign object on the capacitive touch sensor based on the two-dimensional data, compare the two-dimensional data with a second threshold that is greater than the first threshold to detect a second touch position or a second touch area on the capacitive touch sensor at which a detection value indicated by the two-dimensional data exceeds the second threshold.
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