Force sensing module and electronic device

An electronic device, comprising:

• a display screen;
• and
• a force sensing module located at an inner side of the display screen, wherein the force sensing module comprises:
• a first flexible circuit board;
• a substrate;
• and
• a second flexible circuit board, wherein:
• the first flexible circuit board, the substrate, and the second flexible circuit board are stacked in sequence;
• the substrate comprises a first surface and a second surface disposed opposite to the first surface, and the first surface is provided with a first groove;
• a first force sensing resistor and a second force sensing resistor are disposed on a side of the first flexible circuit board facing the first surface, and both the first force sensing resistor and the second force sensing resistor are across the first groove and attached to the first surface;
• a third force sensing resistor and a fourth force sensing resistor are disposed on a side of the second flexible circuit board facing the second surface, the third force sensing resistor corresponds to the first force sensing resistor, the fourth force sensing resistor corresponds to the second force sensing resistor, and both the third force sensing resistor and the fourth force sensing resistor are attached to the second surface;
• and
• the first force sensing resistor, the second force sensing resistor, the third force sensing resistor, and the fourth force sensing resistor form a Wheatstone bridge structure, the force sensing module further comprises a detection circuit electrically connected to the Wheatstone bridge structure, and the detection circuit is configured to detect a differential voltage of the Wheatstone bridge structure.