Touch liquid crystal display and method of controlling the same

A method of controlling a touch control display, wherein the touch control display comprises a thin-film-transition (TFT) array substrate;

• an opposite substrate arranged opposite to the TFT array substrate, wherein the opposite substrate has an inner surface facing the TFT array substrate and an outside surface;
• a cover glass disposed on the outside surface of the opposite substrate, wherein the cover glass has an inner surface facing the opposing substrate and an outside surface, and the cover glass, the TFT array substrate, and the opposite substrate collectively define a display area and a non-display area;
• a plurality of first electrodes disposed in the display area of the opposite substrate;
• a plurality of second electrodes disposed in the non-display area of the cover glass, and disposed on the inner surface of the cover glass;
• and a plurality of third electrodes disposed between the opposite substrate and the TFT array substrate, wherein the plurality of third electrodes are disposed opposite to the plurality of first electrodes, and at least one of the plurality of third electrodes is multiplexed as a common electrode of the TFT array substrate, wherein the method comprises:
• applying a first scanning signal to the plurality of third electrodes;
• detecting a change of coupling capacitance between the plurality of first electrodes and the plurality of third electrodes with the plurality of first electrodes to obtain a coordinate of a touch in the display area;
• applying a second scanning signal to the plurality of second electrodes;
• and
• detecting a change of coupling capacitance between the plurality of first electrodes and the plurality of second electrodes by the plurality of first electrodes to obtain a coordinate of a touch in the non-display area.

A method of controlling a touch control display, wherein the touch control display comprises a thin-film-transition (TFT) array substrate;

• an opposite substrate arranged opposite to the TFT array substrate, wherein the opposite substrate has an inner surface facing the TFT array substrate and an outside surface;
• a cover glass disposed on the outside surface of the opposite substrate, wherein the cover glass has an inner surface facing the opposing substrate and an outside surface, and the cover glass, the TFT array substrate, and the opposite substrate collectively define a display area and a non-display area;
• a plurality of first electrodes disposed in the display area of the opposite substrate;
• a plurality of second electrodes disposed in the non-display area of the cover glass, and disposed on the inner surface of the cover glass;
• and a plurality of third electrodes disposed between the opposite substrate and the TFT array substrate, wherein the plurality of third electrodes are disposed opposite to the plurality of first electrodes, and at least one of the plurality of third electrodes is multiplexed as a common electrode of the TFT array substrate, wherein the method comprises:
• applying a first scanning signal to the plurality of first electrodes or the plurality of third electrodes;
• detecting a change of coupling capacitance between the plurality of first electrodes and the plurality of third electrodes with the plurality of third electrodes or the plurality of first electrodes which are not applied with the first scanning signal, to obtain a coordinate of a touch on the display area;
• applying a second scanning signal to the plurality of second electrodes;
• and
• detecting a self-capacitance of the plurality of second electrodes by the plurality of second electrodes, to obtain a coordinate of a touch on the non-display area.