Display device and manufacturing method thereof

A touch display device comprising:

• a display panel, comprising:
• a base substrate;
• a display structure provided on the base substrate;
• and
• a touch structure, a polarizer and a cover plate, all of which are provided on a side of the display structure away from the base substrate;
• wherein the display structure comprises:
• a display area, wherein a plurality of sub-pixels provided in an array, and a plurality of scanning lines and a plurality of data lines intersecting each other are provided in the display area, the plurality of scanning lines extend along a first direction and the plurality of data lines extend along a second direction different from the first direction;
• and
• a peripheral area surrounding the display area, wherein a plurality of first connection terminals, a plurality of second connection terminals, a plurality of third connection terminals, a plurality of fourth connection terminals, a plurality of fifth connection terminals and a driving control circuit are provided in the peripheral area on a first side of the display panel;
• a flexible circuit board, electrically connected with the display panel, wherein a side of the flexible circuit board is provided with a plurality of first wiring terminals, a plurality of second wiring terminals and a plurality of third wiring terminals, the plurality of first wiring terminals are respectively electrically connected with the plurality of third connection terminals, the plurality of second wiring terminals are respectively electrically connected with the plurality of fourth connection terminals, the plurality of third wiring terminals are respectively electrically connected with the plurality of fifth connection terminals, and the flexible circuit board comprises:
• a first circuit board comprising a first substrate, and a main contact pad, a first wire and a second wire provided on the first substrate, wherein the main contact pad comprises a first contact pad and a second contact pad, the first wire is electrically connected with the first contact pad, and the second wire is electrically connected with the second contact pad;
• a second circuit board comprising a second substrate, and a relay contact pad and a third wire provided on the second substrate, wherein the relay contact pad comprises a third contact pad and a fourth contact pad, and the third contact pad and the fourth contact pad are connected with each other through the third wire;
• and
• a conductive portion for electrically connecting the main contact pad and the relay contact pad, wherein the conductive portion comprises a first conductive portion and a second conductive portion;
• wherein the second circuit board is stacked on the first circuit board so that the second circuit board is provided on a side of the first contact pad and the second contact pad away from the first substrate, the first contact pad and the third contact pad are electrically connected with each other through the first conductive portion, and the second contact pad and the fourth contact pad are electrically connected with each other through the second conductive portion,
• wherein the display panel comprises a base substrate, the plurality of sub-pixels are provided on the base substrate, each sub-pixel comprises an organic electroluminescent element, a touch conductive layer is provided on the organic electroluminescent elements, a plurality of first touch electrodes and a plurality of second touch electrodes are provided in the touch conductive layer, the plurality of first touch electrodes constitute a first touch electrode line extending along the first direction, the plurality of second touch electrodes constitute a second touch electrode line extending along the second direction, the first touch electrode line and second touch electrode line intersect each other, first touch-electrode wires electrically connected with the first touch electrodes and second touch-electrode wires electrically connected with the second touch electrodes are provided in the peripheral area of the display panel, the first touch-electrode wires are electrically connected with the fourth connection terminals, and the second touch-electrode wires are electrically connected with the third connection terminals,
• wherein a vertical distance between the touch conductive layer and a plane where the plurality of data lines are located is a first distance, the display panel further comprises a driving control line electrically connected with the driving control circuit through the third wiring terminal, the driving control line intersects the third wire in space, a vertical distance between the driving control line and the third wire is a second distance, and the first distance is different from the second distance, and
• wherein the first distance is smaller than the second distance.