Patent ID: 9588621
Date: 2017-03-07
CPC Classifications: G06F

Claim:
1. A touch screen controller comprising: a driving part which transmits a driving signal to a touch screen including a plurality of sensing cells; a touch signal sensing unit which transmits a sensing signal to the touch screen and transmits information on a capacitance change pattern of a predetermined area including at least two sensing cells among the plurality of the sensing cells by the driving signal and the sensing signal in correspondence with an object which has touched the touch screen; and a control unit which determines a kind of the object which touches the touch screen, by receiving the information on the capacitance change pattern from the touch signal sensing unit, sets a threshold in correspondence with the determined kind of the object, and determines that a touch signal is generated when a capacitance change amount greater than the set threshold is detected in one sensing cell or a group of sensing cells among the plurality of the sensing cells included in the touch screen, wherein the information on the capacitance change pattern comprises a ratio of a sum of a predetermined number of upper capacitance change amounts within a touch area to a sum of a predetermined number of lower capacitance change amounts within the touch area.