1. A touch input sensing device comprising: a plurality of sensing electrodes; and a controller configured to obtain sensing signals generated from the plurality of sensing electrodes through a plurality of sensing channels electrically connected to the plurality of sensing electrodes, the controller configured to calculate a plurality of difference values between the sensing signals obtained from the plurality of sensing channels connected to mutually adjacent sensing electrodes among the plurality of sensing electrodes to thus determine a touch input, the controller including a driving circuit unit configured to apply a driving signal to at least some of the plurality of sensing electrodes, the driving circuit unit configured to apply the driving signal to a plurality of first electrodes which apply the driving signal to the at least some of the plurality of sensing electrodes, and each one of the plurality of first electrodes crossing each one of a plurality of second electrodes of the plurality of sensing electrodes, the controller configured to determine weighting values, index the plurality of difference values, and apply the weighting values to difference values of sensing signals of mutually adjacent sensing electrodes wherein the weighting values corresponding to the plurality of difference values increases with a distance from the index corresponding to a sign change of a difference value.