Patent ID: 9448667
Filing Date: 2016-09-20
CPC Classification: G06F

Claim Text:
1. A coordinate detecting device comprising: a plurality of first electrodes arranged in a first direction and a plurality of second electrodes arranged in a second direction different from the first direction; a detecting unit configured to scan the plurality of first electrodes and the plurality of second electrodes, thereby detecting sensor output values of the first electrodes and sensor output values of the second electrodes which a detection target touches; and an arithmetic processing unit configured to determine a number of regions which the detection target touches on the basis of the sensor output values, and changes a coordinate calculation process based on the number of the detected regions, wherein, when there are a plurality of peak regions in which the sensor output values of both the first electrodes and the second electrodes are equal to or greater than a first threshold value, the detecting unit detects the sensor output values at intersection points between the first electrodes and the second electrodes in the peak regions by selectively scanning only the first electrodes and the second electrodes corresponding to each intersection point in the peak regions, and the arithmetic processing unit calculates the coordinates of the detection target on the basis of only the sensor output values at the intersection points between the first electrodes and the second electrodes in the peak regions and the coordinates of the first and second electrodes in the peak regions; wherein, when there is a single peak regions in which the sensor output values of both the first electrodes and the second electrodes are equal to or greater than the first threshold value, the arithmetic processing unit calculates the coordinates on the basis of the sensor output values each of the plurality of first electrodes and the sensor output values of the plurality of second electrodes; wherein the first threshold value comprises an ON threshold value and an OFF threshold value; and wherein when calculating the coordinates of the detection target, the detection of the peak region is changed according to whether the first threshold value has been in the ON threshold value or the OFF threshold value in a previous detection of the scan.