Abstract: A touch display includes an active display screen, a display driving circuit, a touch system circuit, and a display/touch signal gating-switch and output circuit or display/touch signal loading and merge circuit. A vertical blanking time exists between each two display times of a display screen electrode, during the time, the display screen does not execute display driving, and stops scanning the row electrodes, the column electrodes and the COM electrode maintain an original output state or a certain preset output signal, and a part or all of active devices of the display screen are in an off state; during a time of transmitting a display signal by the display screen electrode, due to a transient potential difference of an applied touch signal between the electrodes, the active devices of the display screen are enabled to maintain the off state.

Abstract: A touch display is provided, in which at least one substrate of an active LCD screen has an active device array and a row electrode group and a column electrode group connected to an active device array, and another substrate of the display screen has a common (COM) electrode; and after a normal display time ends, Liquid Crystal (LC) pre-driving signals are applied to a part or all of row and column electrode lines and the COM electrode of the display screen, an intensity of the LC pre-driving signal enables a potential difference between the row and the column electrode lines and the COM electrode with the applied LC pre-driving signals to be not smaller than an LC saturation driving voltage, such that LC molecules between the row and the column electrode lines and the COM electrode with the applied LC pre-driving signals are in a determined arrangement state.

Abstract: A touch display is provided, which includes a flat panel display (FPD), a display driving circuit, a touch system circuit, and a display/touch signal gating-switch and output circuit or display/touch signal loading and merge circuit. The touch system circuit has a touch excitation source and a touch signal detection unit. Row electrode groups and column electrode groups are disposed on a substrate of the display screen, and the touch system circuit applies a touch signal to a certain electrode line in the row electrode group or the column electrode group and detects change of the touch signal on the electrode line, so as to detect whether the electrode is touched.

Abstract: A touch screen is provided, which includes a substrate and a touch system circuit. Two or more groups of intersected row electrode groups and column electrode groups are disposed on the substrate. The touch system circuit has a touch excitation source and a touch signal detection unit. The touch signal detection unit has a signal detection channel, a data convert channel, and a data processing and timing control unit. The touch system circuit applies a touch signal to an electrode line in the row electrode groups or column electrode groups, and detects a change of the touch signal on the electrode line, so as to detect whether the electrode is touched or not.