Method, apparatus and system for pressure detection, touch-control chip and electronic device

An apparatus for pressure detection, wherein the apparatus is configured to detect a pressure generated by an active pen on a screen of an electronic device;

• the active pen comprising:
• a first electrode, a second electrode and a pressure sensor, wherein the first electrode is configured to output a first driving signal, the second electrode is configured to output a second driving signal when the pressure sensor detects a first pressure generated by the active pen, a first detecting signal corresponding to the first driving signal is configured to determine a position of the active pen on the screen, and a second detecting signal corresponding to the second driving signal is configured to calibrate the position;
• the apparatus comprising:
• a processing module, configured to determine whether the active pen is pressing the screen according to the second detecting signal, when information of the first pressure is not received;
• a control module, configured to display handwriting of the active pen on the screen according to a second pressure, when the processing module determines that the active pen is pressing the screen, wherein the second pressure is a preset pressure,
• wherein the control module is further configured to display the handwriting of the active pen through the screen according to the first pressure when the information of the first pressure is received.

A touch control chip, comprising a pressure detection apparatus, wherein the apparatus is configured to detect a pressure generated by an active pen on a screen of an electronic device;

• the active pen comprising:
• a first electrode, a second electrode and a pressure sensor, wherein the first electrode is configured to output a first driving signal, the second electrode is configured to output a second driving signal when the pressure sensor detects a first pressure generated by the active pen, a first detecting signal corresponding to the first driving signal is configured to determine a position of the active pen on the screen, and a second detecting signal corresponding to the second driving signal is configured to calibrate the position;
• the apparatus comprises:
• a processing module, configured to determine whether the active pen is pressing the screen according to the second detecting signal, when information of the first pressure is not received;
• a control module, configured to display handwriting of the active pen on the screen according to a second pressure, when the processing module determines that the active pen is pressing the screen, wherein the second pressure is a preset pressure;
• wherein the control module is further configured to display the handwriting of the active pen through the screen according to the first pressure when the information of the first pressure is received.