Patent ID: 9552111
Date: 2017-01-24
CPC Classifications: G06F

Claim:
1. A touch sensing device comprising: a touch sensor panel; a sensing area formed on the touch sensor panel for detecting a touch coordinate; a plurality of first electrodes formed in the sensing area and extending along a first direction; a plurality of second electrodes formed in the sensing area and extending along a second direction intersected the first direction; a plurality of cross points of the plurality of first electrodes and the plurality of second electrodes; a touch detection unit that detects a detected signal value corresponding to the plurality of cross points; a coordinate calculation unit that calculates tentative touch coordinates based on the detected signal value, and that calculates theoretical values of the plurality of cross points based on the tentative touch coordinates; and a plurality of connecting wirings formed on the touch sensor panel outside the sensing area, wherein the plurality of connecting wirings are connected to the plurality of first electrodes and the plurality of second electrodes on an end of the sensing area, respectively, wherein the coordinate calculation unit determines, based on the tentative touch coordinates, whether a first area within the sensing area is touched, or a second area within the sensing area is touched, wherein the second area is closer to the end of the sensing area than the first area, and includes an outermost electrode of the plurality of electrodes, and wherein, in case that the coordinate calculation unit determined the second area is touched, the coordinate calculation unit obtains touch coordinates by calculation using least squares linear Taylor differential correction method with the tentative touch coordinate of the second area, which is an initial value of the calculation.