Touch display panel and display device

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

• a base substrate,
• a plurality of gate lines provided on the base substrate,
• a plurality of data lines provided on the base substrate,
• a common electrode layer formed by a plurality of self-capacitance electrodes arranged in an M*N array;
• a drive integrated circuit;
• and
• a plurality of touch detection signal lines;
• wherein the plurality of gate lines and the plurality of data lines are insulated from and intersecting with each other to define a plurality of sub-pixels, at least three adjacent sub-pixel columns of the plurality of sub-pixels constitute one pixel column, each sub-pixel column is parallel to an extending direction of the plurality of data lines;
• each of the plurality of touch detection signal lines is located between two adjacent pixel columns, the plurality of touch detection signal lines connects the plurality of self-capacitance electrodes with the drive integrated circuit, at least a part of the two adjacent pixel columns is not provided with the touch detection signal line therebetween;
• in a display stage, the drive integrated circuit provides a common signal to the plurality of touch detection signal lines;
• in a touch stage, the drive integrated circuit provides a touch detection signal to the plurality of touch detection signal lines,
• wherein the touch display panel further comprises:
• a plurality of metal lines, the plurality of metal lines is arranged in a gap between two adjacent columns of the plurality of self-capacitance electrodes, the two adjacent columns of the plurality of self-capacitance electrodes are arranged along an extending direction of a scan line;
• wherein the plurality of metal lines and the plurality of touch detection signal lines are arranged in a same layer and are parallel to each other;
• in the display stage, the drive integrated circuit provides a common signal to the plurality of metal lines;
• in the touch stage, the drive integrated circuit provides a touch detection signal to the plurality of metal lines.