Touch display and sensing method

A touch display, comprising:

• a substrate;
• a display array, disposed on the substrate, wherein an upper layer of the display array comprises a shielding metal layer;
• a touch sensor, disposed above the display array;
• and
• a controller, coupled to the display array and the touch sensor, wherein the controller is configured to:
• enable the display array to display and obtain a first sensing result from the touch sensor during a first time interval;
• disable the display array and obtain a second sensing result from the touch sensor during a second time interval, wherein the controller disables the display array during the second time interval and obtains the second sensing result from the touch sensor only after the first sensing result shows that the touch display receives a palm pressure touch from the user;
• and
• generate a touch determination result of whether the touch display receives a touch from a user according to the first sensing result and the second sensing result.