Touch module that detects capacitance caused by pressure at touch position, driving method thereof, and display device

A driving method for a touch module,

• wherein the touch module comprises a touch substrate, and a first transparent electrode layer comprising first touch detection electrodes arranged in an array and insulated from each other, a second transparent electrode layer and a transparent flexible dielectric layer between the first transparent electrode layer and the second transparent electrode layer that are arranged below an opposite surface of a touch surface of the touch substrate,
• wherein the second transparent electrode layer comprises second touch detection electrodes insulated from each other, the second touch detection electrodes and the first touch detection electrodes being in one-to-one correspondence and orthographic projections thereof on the flexible dielectric layer coinciding with each other,
• wherein during a touch detection period, the first transparent electrode layer and the second transparent electrode layer are used to receive a first touch detection signal simultaneously so as to detect a change in a capacitance value of each of the first touch detection electrodes to thereby determine a touch position,
• wherein during a pressure detection period, one of the first transparent electrode layer and the second transparent electrode layer is used to receive a second touch detection signal so as to detect a change in a capacitance value between each of the first touch detection electrodes and the second transparent electrode layer caused by a pressure at the touch position,
• wherein the touch detection period and the pressure detection period are non-concurrent;
• wherein the touch module further comprises a touch detection chip for providing the first touch detection signal and the second touch detection signal;
• the driving method comprising:
• during the touch detection period, loading by the touch detection chip the first touch detection signal simultaneously to the first transparent electrode layer and the second transparent electrode layer so as to detect the change in the capacitance value of each of the first touch detection electrodes in the first transparent electrode layer to determine the touch position;
• during the pressure detection period, loading by the touch detection chip the second touch detection signal to the first transparent electrode layer or the second transparent electrode layer so as to detect the change in the capacitance value between each of the first touch detection electrodes and the second transparent electrode layer caused by the pressure at the touch position.