TOUCH SCREEN DISPLAY DEVICE

摘要

A touch screen display device is discussed. The device uses common electrodes, which are formed for display images, as touch electrodes. In a display interval, the common electrodes receive a common voltage and allow images to be displayed. In a touch sensing interval corresponding to a non-display interval of a single frame of plural frames, the common electrodes are driven as the touch electrodes and allow a touch position to be sensed. When the touch sensing interval is terminated, the data voltages which had been applied to the data lines before the touch sensing interval are re-applied to the data lines. As such, when a succeeding display interval starts after the touch sensing interval, the reduction of charging voltage in a pixel can be prevented or reduced. Therefore, a picture fault or an image fault can be prevented.

主权项

1. A touch screen display device comprising:
a display panel configured to include a plurality of pixels and a plurality of common electrodes; a gate driver configured to group a plurality of gate lines on the display panel into at least two blocks and sequentially drive the grouped blocks in a primary time interval; a data driver configured to drive a plurality of data lines on the display panel every primary time interval; a common voltage generator configured to apply a common voltage to the common electrodes every primary time interval; a touch controller configured to detect a touch position on the display panel using a capacitance being induced in the common electrodes every secondary time interval from a time point after a respective block is driven to another time point before a succeeding block is driven; and an in-set signal controller configured to store data signals opposite to the pixels on the last gate line within the respective block as in-set signals whenever the respective block is driven, and supply the stored in-set signals with the data lines before the succeeding block is driven.