Touch display panel and driving method thereof

Abstract

A driving method of a touch display panel is provided. The method is applied to a controller of the touch display panel. The method begins by enabling a capacitive touch unit and an electromagnetic touch unit in the touch display panel. The electromagnetic touch unit includes an electromagnetic pen detect pin that provides a detect signal indicating whether an electromagnetic pen approaches the touch display panel. It is then determined whether the detect signal triggers an electromagnetic pen approach event in which the detect signal switches from a first level to a second level. When the electromagnetic pen approach event is triggered, the capacitive touch unit is driven to switch to an interrupt state to terminate a touch sensing operation of the capacitive touch unit, and a touch sensing operation is performed through the electromagnetic touch unit.

Dependencies are inferred from the claim text.