Touch panel, touch display device and touch pressure detection method

A touch display device, comprising a touch panel, wherein the touch panel comprises:

• a substrate comprising a touchable area, wherein the touchable area comprises a plurality of touch areas;
• a touch position detection apparatus disposed on the substrate;
• a plurality of pressure sensor groups disposed outside the touchable area, wherein each of the plurality of pressure sensor groups comprises a first-type pressure sensor and a second-type pressure sensor;
• wherein the first-type pressure sensors of the plurality of pressure sensor groups are disposed between the touchable area and a first edge of the substrate, the second-type pressure sensors of the plurality of pressure sensor groups are disposed between the touchable area and a second edge of the substrate, wherein the first edge is opposite to the second edge, wherein the first-type pressure sensor and the second-type pressure sensor of a same pressure sensor group are symmetric about a centerline of the touch panel;
• and wherein each of the plurality of touch areas corresponds to at least one of the plurality of pressure sensor groups;
• and
• a processor electrically connected to the touch position detection apparatus and the plurality of pressure sensor groups, wherein the processor controls the touch position detection apparatus to detect an instant touch position, determines the touch area with which the instant touch position is associated, and calculates a touch pressure intensity according to pressure detection signals of the at least one pressure sensor group corresponding to the touch area,
• wherein the touch panel is a rectangle, a number of the plurality of touch areas is 2N, and a number of the plurality of pressure sensor groups is N, wherein N is an integer greater than or equal to 1,
• wherein the 2N touch areas are arranged in a matrix of N rows and two columns on the touch panel, and each of the N pressure sensor groups consists of one first-type pressure sensor and one second-type pressure sensor,
• wherein the 2N touch areas comprises N first touch areas and N second touch areas, the N first touch areas are arranged in one of the two columns close to the first edge of the substrate, and the N second touch areas are arranged in the other one of the two columns close to the second edge of the substrate,
• wherein the touch pressure intensity of a touch pressure applied in the first touch area is calculated according to a first pressure detection signal output from the one first-type pressure sensor and a second pressure detection signal output from the one second-type pressure sensor of the pressure sensor group in a same row as the first touch area, and a third pressure detection signal output from the one first-type pressure sensor of the pressure sensor group in a row adjacent to the row where the first touch area is located,
• wherein the touch pressure intensity of a touch pressure applied in the second touch area is calculated according to a fourth pressure detection signal output from the one first-type pressure sensor and a fifth pressure detection signal output from the one second-type pressure sensor of the pressure sensor group in a same row as the second touch area, and a sixth pressure detection signal output from the one second-type pressure sensor of the pressure sensor group in a row adjacent to the row where the second touch area is located.

A touch pressure detection method for a touch panel, wherein the touch panel comprises:

• a substrate, comprising a touchable area, wherein the touchable area comprises a plurality of touch areas;
• a touch position detection apparatus disposed on the substrate;
• a plurality of pressure sensor groups disposed outside the touchable area, wherein each of the plurality of pressure sensor groups comprises a first-type pressure sensor and a second-type pressure sensor;
• wherein the first-type pressure sensors of the plurality of pressure sensor groups are disposed between the touchable area and a first edge of the substrate, the second-type pressure sensors of the plurality of pressure sensor groups are disposed between the touchable area and a second edge of the substrate, wherein the first edge is opposite to the second edge, wherein the first-type pressure sensor and the second-type pressure sensor of a same pressure sensor group are symmetric about a centerline of the touch panel;
• and each of the plurality of touch areas corresponds to at least one of the plurality of pressure sensor groups;
• wherein the touch panel is a rectangle, a number of the plurality of touch areas is 2N, and a number of the plurality of pressure sensor groups is N, wherein N is an integer greater than or equal to 1,
• wherein the 2N touch areas are arranged in a matrix of N rows and two columns on the touch panel, and each of the N pressure sensor groups consists of one first-type pressure sensor and one second-type pressure sensor,
• wherein the 2N touch areas comprises N first touch areas and N second touch areas, the N first touch areas are arranged in one of the two columns close to the first edge of the substrate, and the N second touch areas are arranged in the other one of the two columns close to the second edge of the substrate,
• wherein the touch pressure intensity of a touch pressure applied in the first touch area is calculated according to a first pressure detection signal output from the one first-type pressure sensor and a second pressure detection signal output from the one second-type pressure sensor of the pressure sensor group in a same row as the first touch area, and a third pressure detection signal output from the one first-type pressure sensor of the pressure sensor group in a row adjacent to the row where the first touch area is located,
• wherein the touch pressure intensity of a touch pressure applied in the second touch area is calculated according to a fourth pressure detection signal output from the one first-type pressure sensor and a fifth pressure detection signal output from the one second-type pressure sensor of the pressure sensor group in a same row as the second touch area, and a sixth pressure detection signal output from the one second-type pressure sensor of the pressure sensor group in a row adjacent to the row where the second touch area is located;
• and
• a processor;
• wherein the touch pressure detection method comprises:
• controlling, by the processor, the touch position detection apparatus to detect an instant touch position;
• determining, by the processor, the touch area with which the instant touch position is associated;
• and
• calculating, by the processor, a touch pressure intensity according to pressure detection signals output from the at least one pressure sensor group corresponding to the touch area.