Abstract: A dynamic power adjustment circuit for noise rejection in a capacitance touch system includes: a power source configured to generate a fixed power voltage V, a voltage adjustment circuit electrically connected to the power source, and a noise detection circuit electrically connected to the voltage adjustment circuit. The voltage adjustment circuit is configured to generate a plurality of different voltage signals VH(1), VH(2), . . . , VH(n) from the power voltage V, to select one of the voltage signals VH(1), VH(2), . . . , VH(n) as an adjusting voltage VH according to a noise selection signal VH_SEL, and to output the adjusting voltage VH to a level shift for adjusting a driving voltage. The noise detection circuit is configured to generate the noise selection signal VH_SEL for the voltage adjustment circuit according to a plurality of sensing signals RX generated by a capacitance touch sensing device of the capacitance touch system.

Abstract: A method for driving a touch display for sensing a touch event and displaying an image characterized with a series of frames includes performing a driving operation for a display device of the touch display to display the image, and a sensing operation for a touch sensing device of the touch display to sense a touch event. The driving operation is configured such that for selected frames of the series of frames, the display device is not driven, and for the other frames of the series of frames, the display device is driven. The sensing operation is configured such that during the selected frames in which the display device is not driven, the touch sensing device is driven, and during the other frames in which the display device is driven, the touch sensing device is not driven.