Patent ID: 9310942
Filing Date: 2016-04-12
CPC Classification: G06F

Claim Text:
1. A touch-sensitive display device comprising: a display panel including data lines, gate lines crossing the data lines, and a pixel array including pixels arranged in a matrix form; a touch screen including Tx lines, Rx lines crossing the Tx lines, and touch sensors formed at crossings of the Tx lines and the Rx lines; a display driving circuit configured to supply video data voltages to the pixels of the display panel; and a touch screen driving circuit configured to sequentially supply at least one delayed pulse of a plurality of delayed pulses to each of the Tx lines, and sense an output signal of each of the touch sensors through the Rx lines, wherein a falling edge of each of the at least one delayed pulse supplied to the Tx lines of the touch screen is present in a horizontal blank period of gate voltages supplied to the pixels of the display panel, wherein the touch screen driving circuit samples the output signal of each of the touch sensors through the Rx lines in synchronization with the falling edge of each of the at least one delayed pulse of the plurality of delayed pulses supplied to the Tx lines of the touch screen within the horizontal blank period of gate voltages supplied to the pixels of the display panel, and wherein the horizontal blank period corresponds to a period when data is not written to the pixels.