Touch display apparatus, driving circuit, and driving method

A driving circuit for driving a touch display apparatus, comprising:

• a first driving module configured to provide a first signal to a common electrode of the touch display apparatus for realizing touch detection during a touch sensing stage;
• and
• a second driving module configured to provide a second signal to a gate line of the touch display apparatus during the touch sensing stage, wherein the second signal is used to control a thin film transistor of the touch display apparatus to be switched off and is used to decrease charge and discharge capacity of a capacitor formed by the common electrode and the gate line, wherein a high level of the second signal is smaller than a threshold voltage of the thin film transistor, wherein the second signal is a pulse signal with a same frequency and a same phase as the first signal, but has a different amplitude from the first signal;
• and
• a third driving module configured to provide a third signal during the touch sensing stage, wherein the third signal is used to control a data line to enter and maintain a floating state during the touch sensing stage to decrease charge and discharge capacity of a capacitor formed by the common electrode and the data line of the touch display apparatus, wherein the data line is not provided with a ground signal during the touch sensing stage.

A driving method for driving a touch display apparatus, comprising:

• providing a driving signal to a plurality of gate lines of the touch display apparatus sequentially, providing a display signal to a data line of the touch display apparatus, and providing a common voltage signal to a plurality of electrode units of a common electrode of the touch display apparatus, during a display stage;
• providing a first signal to the common electrode for realizing touch detection during a touch sensing stage, wherein the plurality of electrode units are arranged in a matrix, and the first signal provided to the common electrode is then applied to the plurality of electrode units for realizing self-capacitive detection;
• and
• providing a second signal to the gate lines in the process of providing the first signal to the common electrode, wherein the second signal is used to control a thin film transistor of the touch display apparatus to be switched off and is used to decrease charge and discharge capacity of a capacitor formed by the common electrode and the gate lines, wherein a high level of the second signal is smaller than a threshold voltage of the thin film transistor, wherein the second signal is a pulse signal with a same frequency and a same phase as the first signal, but has a different amplitude from the first signal;
• and
• providing a third signal in the process of providing the first signal to the common electrode, and controlling the data line to enter and maintain a floating state via the third signal to decrease charge and discharge capacity of a capacitor formed by the common electrode and the data line, wherein the data line is not provided with a ground signal during the touch sensing stage.