Voltage driving method and device for touch display panel, and touch display panel

A voltage driving device for a touch display panel, the touch display panel comprising a common electrode extending in a first direction and a plurality of columns of touch electrodes extending parallel to each other in a second direction, the first direction intersecting the second direction,

• the voltage driving device comprising a voltage applying portion, a voltage detection portion and a voltage control portion, wherein,
• the voltage applying portion is configured to apply a first scanning voltage to two outermost columns of touch electrodes of the touch display panel during a first period of a first touch cycle, the first touch cycle comprising a plurality of periods, the first scanning voltage being equal to a reference voltage;
• the voltage detection portion is configured to detect a first output voltage output by at least one of the two outermost columns of touch electrodes during the first period of the first touch cycle;
• and
• the voltage control portion is configured to adjust, based on the detected first output voltage, a scanning voltage applied to the at least one of the two outermost columns of touch electrodes during a first period of a second touch cycle immediately after the first touch cycle to a second scanning voltage, such that a second output voltage output by the at least one of the two outermost columns of touch electrodes during the first period of the second touch cycle is equal to the reference voltage.