Patent ID: 9086773
Filing Date: 2015-07-21
Classification: G06F

Abstract:
1. A touchscreen device, comprising: a panel unit including rows of first electrodes extending in a first direction and columns of second electrodes extending in a second direction intersecting the first direction; a sensing circuit unit sensing changes in capacitance in intersections of the first electrodes and the second electrodes; a signal conversion unit converting the changes in capacitance into a digital signal; and an operation unit creating a binary image in a matrix form having rows of the first electrodes and columns of the second electrodes based on the digital signal, and projecting the binary image onto every first electrode and every second electrode in the first and second directions, respectively, to create a projection mask including a plurality of bit masks, the operation unit selecting as touch candidate regions a plurality of sub images consisting of common regions between the bit masks for the first electrodes having a value of 1 or higher and the bit masks for the second electrodes having a value of 1 or higher, to determine whether a touch has occurred.