Touch screen display device with in-set signals, driver circuit for the touch screen display device, and method for driving the 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 driver circuit for driving a touch screen display device, the touch screen display device comprising a panel including a plurality of gate lines, a plurality of data lines, a plurality of pixels defined at intersections of the gate lines and the data lines, and a plurality of common electrodes, the panel being driven in at least a first display period, a first touch period subsequent to the first display period, a second display period subsequent to the first touch period, and a second touch period subsequent to the second display period, and a first group of the gate lines being driven sequentially during the first display period and a second group of the gate lines being driven sequentially during the second display period, the driver circuit comprising:
first circuitry to drive the data lines during the first display period and the second display period; second circuitry to provide a touch drive signal to one or more of the common electrodes during the first touch period and the second touch period to detect a touch; and a memory to store first in-set signals, the first in-set signals corresponding to first data signals driven to the data lines when a last gate line of the first group of the gate lines is driven during the first display period, the first in-set signals stored in the memory prior to the first touch period and the first in-set signals being supplied from the memory and driven to the data lines during a first data insertion period subsequent to the first touch period but prior to the second display period to precharge the data lines for the second display period prior to the second display period.