Display device and data driver

A data driver for driving a plurality of data lines disposed in a display panel, the data driver comprising:

• a latch circuit configured to store video data;
• a digital-to-analog converter configured to convert the video data into an analog video signal in a form of an analog voltage;
• and
• a simultaneous driving circuit configured to supply a video data signal based on the analog video signal to each of the plurality of data lines, the video data signal including a first signal segment and a second signal segment maintaining a predetermined voltage difference,
• the simultaneous driving circuit further configured to output readout data in response to signal sensing through each of the plurality of data lines to which the video data signal is supplied,
• wherein, during a period in which a gate signal having a turn-on voltage level is supplied to each of m number of gate lines among a plurality of gate lines disposed in the display, panel, where the m is a natural number equal to or greater than 2,
• the simultaneous driving circuit is configured to output the readout data regarding a single touch sensor block, based on sensing signals sensed through each of n number of data lines among the plurality of data lines, respectively, where the n is a natural number equal to or greater than 2, the single touch sensor block corresponding to subpixels defined by the m number of gate lines and the n number of data lines, among the plurality of subpixels, and
• wherein the single touch sensor block is an assembly of storage capacitor plates respectively being one of a first plate and a second plate of a storage capacitor included in each of the subpixels defined by the in number of gate lines and the n number of data lines.