Patent ID: 9058072
Filing Date: 2015-06-16
Classification: G06F,G09G

Abstract:
1. A touch sensing apparatus comprising: a display device including a plurality of pixels and displaying an image; a touch screen including a plurality of touch sensors and being included in the display device; display panel driving circuits for driving the display device; a touch sensing circuit for applying a driving signal to the touch sensors to sense a voltage or capacitance variation in the touch sensors; a controller for time-dividing a first frame period into a first driving period for displaying an image on the display device and a second driving period for sensing the touch sensors; and a reset control circuit for controlling operations of the display panel driving circuits with a reset enable signal to initialize all the pixels of the display device to an equivalent reset voltage at predetermined intervals between the first driving period and the second driving period, wherein the display panel driving circuits include a gate driving circuit, wherein the gate driving circuit sequentially supplies a first gate pulse synchronized with a data voltage to gate lines in the first driving period and supplies a second gate pulse synchronized with the reset voltage to the gate lines on the basis of the reset enable signal, wherein the gate driving circuit simultaneously provides the second gate pulse to all the gate lines of the display panel, wherein the reset control circuit generates the reset enable signal and sets a reset period during which the reset voltage is applied to the pixels on the basis of the reset enable signal, and wherein the reset period is arranged between the first driving period and the second driving period for every N (N being a natural number greater than 1) frames.