Patent ID: 9164637
Filing Date: 2015-10-20
Classification: G06F

Abstract:
1. A touch sensing device comprising: a display panel including a touch screen on which a plurality of touch sensors are formed; a touch sensing circuit including at least one sensing unit which receives self capacitance signals of a first touch sensor and a second touch sensor adjacent to the first touch sensor among the plurality of touch sensors at differential input method and detects changes in capacitances of the first and second touch sensors; and a touch controller configured to analyze touch raw data received from the touch sensing circuit and calculate coordinates of a touch input position, wherein the at least one sensing unit generates delays corresponding to a difference between the capacitances of the adjacent first and second touch sensors, counts the generated delays, accumulates a number of the delays, converts an accumulated value of the delays into digital data, and generates the touch raw data, and wherein the sensing unit senses changes in capacitances of the first and second touch sensors multiple times based on a dot clock during a previously set period, in which the self capacitance signals of the first and second touch sensors continuously rise.