At present, a touch display screens are provided in more and more electronic devices, e.g., an information inquiry machine in a public service hall, or a computer or a mobile phone used by a user in daily life and work. Using a touch display screen, the user can operate the electronic device by simply touching icons on the touch display screen with a finger, thereby getting rid of the keyboard and mouse operations and making a human-computer interaction more straightforward. To better meet user requirements, the touch display screen is typically provided with one or more pressure sensors for detecting touch pressure values when the user touches the touch display screen.
Static electricity generated by a structure in a display area or a circuit in a non-display area causes damage to the pressure sensors when the touch display screen is being manufactured or is running properly. In addition, when a high intensity current flows through a power line or a ground potential line electrically connected to a signal input terminal of a pressure sensor or when the touch display screen is subjected to electrostatic testing, the pressure sensor is affected by the corresponding static electricity, causing damage or performance deterioration to the pressure sensor.