TOUCH DISPLAY DEVICE AND METHOD FOR SENSING CAPACITANCE THEREOF

摘要

A touch display device and a method for sensing capacitance thereof are provided. The touch display device includes a display panel having a plurality of liquid crystal pixels, a source driver, a touch panel having a plurality of touch areas, a touch sensing circuit and a crosstalk compensation unit. The source driver writes a plurality of pixel voltages into the liquid crystal pixels according to a plurality of display data. The touch panel is disposed and overlapped with the display panel. The touch sensing circuit senses a capacitance variation amount corresponding to each of the touch areas. The crosstalk compensation unit is coupled to the touch sensing circuit to receive the capacitance variation amount corresponding to each of the touch areas and corrects the capacitance variation amounts according to a plurality of capacitance crosstalk values corresponding to the liquid crystal pixels so as to provide a plurality sensing signals.

主权项

1. A touch display device, comprising:
a display panel, having a plurality of liquid crystal pixels; a source driver, coupled to the display panel and receiving a plurality of display data to write a plurality of pixel voltages to the liquid crystal pixels according to the display data; a touch panel, disposed and overlapped with the display panel and having a plurality of touch areas, wherein each of the touch areas corresponding to a portion of the liquid crystal pixels; a touch sensing circuit, coupled to the touch panel and sensing a capacitance variation amount corresponding to each of the touch areas; a crosstalk compensation unit, coupled to the touch sensing circuit, receiving the capacitance variation amount corresponding to each of the touch areas and correcting the capacitance variation amount corresponding to each of the touch areas according to a plurality of capacitance crosstalk values respectively corresponding to the liquid crystal pixels so as to provide a plurality sensing signals.