Pressure-sensing circuit, method for driving pressure-sensing circuit, and display device

A pressure-sensing circuit, comprising pressure-sensing gating lines arranged in rows, pressure-sensing reading lines arranged in columns, piezoresistance sensing circuits arranged in N rows and M columns, a pressure-sensing sub-circuit, a current input control circuit, and a current supply circuit for supplying a pressure-sensing current, where each of N and M is an integer greater than 1;

• a piezoresistance sensing circuit in an nth row and an mth column comprises a piezoresistance sensor in the nth row and the mth column and a switching circuit in the nth row and the mth column, where n is a positive integer smaller than or equal to N, and m+1 is a positive integer smaller than or equal to M;
• a first end of the piezoresistance sensor in the nth row and the mth column is connected to the pressure-sensing reading line in the mth column, a control end of the switching circuit in the nth row and the mth column is connected to the pressure-sensing gating line in the nth row, a first end of the switching circuit in the nth row and the mth column is connected to a second end of the piezoresistance sensor in the nth row and the mth column, and a second end of the switching circuit in the nth row and the mth column is connected to a pressure-sensing reading line in a (m+1)th column;
• the piezoresistance sensing circuit in the nth row and an Mth column comprises a piezoresistance sensor in the nth row and the Mth column and a switching circuit in the nth row and the Mth column;
• a first end of the piezoresistance sensor in the nth row and the Mth column is connected to a pressure-sensing reading line in the Mth column, a control end of the switching circuit in the nth row and the Mth column is connected to the pressure-sensing gating line in the nth row, a first end of the switching circuit in the nth row and the Mth column is connected to a second end of the piezoresistance sensor in the nth row and the Mth column, and a second end of the switching circuit in the nth row and the Mth column is connected to a first level end, wherein the first level end is the ground;
• the current input control circuit comprises N current input control sub-circuits;
• a first end of an nth current input control sub-circuit is connected to the current supply circuit, a first end of a piezoresistance sensor in the nth row and a first column is further connected to a second end of the nth current input control sub-circuit, and a control end of the nth current input control sub-circuit is connected to the pressure-sensing gating line in the nth row;
• and
• the pressure-sensing sub-circuit is connected to each of the pressure-sensing reading lines, and configured to perform a pressure-sensing operation in accordance with a voltage signal acquired from the pressure-sensing reading line.