Patent ID: 8854334
Filing Date: 2014-10-07
Classification: G06F

Abstract:
1. A capacitive touch display device, comprising: a capacitive touch panel comprising a plurality of touch sensing units, a plurality of scan lines, a plurality of thin film transistors, a plurality of pixel electrodes and a color filter substrate, each touch sensing unit comprising a touch sensing element and a coupling sensing element due to coupling effect of parasitic elements, the touch sensing element and the coupling sensing element are directly connected to the corresponding scan lines, the gate of each thin film transistor is directly connected to the corresponding scan line, and the drain of each thin film transistor is directly connected to each pixel electrode, wherein the color filter substrate further comprises a common electrode layer, and the coupling sensing element comprises an electrode and a switch unit comprising a control end connected to the electrode, wherein the common electrode layer cannot directly touch and connect the electrode and the switch unit when the coupling sensing element is operated, and a signal processing circuit electrically connected to the touch sensing element and the coupling sensing element through at least one touch sensing line, wherein the touch sensing element provides a touch signal to the signal processing circuit, the coupling sensing element provides a coupling signal to the signal processing circuit, the touch signal comprises a scanning signal, a real-touch signal, and an interference signal, the coupling signal comprises a scanning signal and an interference signal, and the signal processing circuit eliminates the coupling signal from the touch signal to filter the interference signal of the touch signal.