CN-115586850-B - Touch display panel and touch display device

CN115586850BCN 115586850 BCN115586850 BCN 115586850BCN-115586850-B

Abstract

The embodiment of the invention discloses a touch display panel and a touch display device, wherein the touch display panel comprises a plurality of data signal transmission wires and a plurality of touch signal transmission wires which are arranged in a non-display area, the data signal transmission wires and the touch signal transmission wires are arranged in different layers, an overlapping area exists between the data signal transmission wires and the touch signal transmission wires along the thickness direction of the touch display panel, the touch display panel also comprises a fixed potential structure which is arranged in the non-display area, and the fixed potential structure is arranged between a film layer where the data signal transmission wires are arranged and a film layer where the touch signal transmission wires are arranged along the thickness direction of the touch display panel, and at least partially overlaps with the overlapping area. By arranging the fixed potential structure in the overlapping area between the data signal transmission wiring and the touch signal transmission wiring, the mutual interference of the data signal transmission wiring and the touch signal transmission wiring in the overlapping area is prevented, and the display effect and the touch recognition sensitivity are improved.

Inventors

MA HONGSHUAI
LI JIAXIN

Assignees

厦门天马显示科技有限公司

Dates

Publication Date: 20260505
Application Date: 20221020

Claims (10)

1. The touch display panel is characterized by comprising a non-display area; The touch display panel further comprises a plurality of data signal transmission wires and a plurality of touch signal transmission wires, wherein the data signal transmission wires and the touch signal transmission wires are arranged in the non-display area, are arranged in different layers, and are in an overlapping area along the thickness direction of the touch display panel; the touch display panel further comprises a fixed potential structure arranged in the non-display area, the fixed potential structure is arranged between a film layer where the data signal transmission line is positioned and a film layer where the touch signal transmission line is positioned along the thickness direction of the touch display panel, and the fixed potential structure at least partially overlaps the overlapping area; the touch display panel further comprises a positive power signal lead-out wire and a negative power signal lead-out wire which are arranged in the non-display area, and at least part of the positive power signal lead-out wire and the negative power signal lead-out wire are positioned between the data signal transmission wire and the touch signal transmission wire along the thickness direction of the touch display panel; the positive power supply signal extraction wiring and the negative power supply signal extraction wiring comprise a space, and the fixed potential structure is positioned at the space; The touch display panel comprises a light emitting element, wherein the light emitting element comprises a second electrode; The fixed potential structure and the second electrode are integrally arranged, the film layer where the second electrode is positioned comprises a first boundary arranged in the non-display area, the first boundary comprises a first boundary part and a second boundary part which are connected with each other, and the first boundary part is arranged at one side of the second boundary part far away from the display area; The touch display panel further comprises a packaging layer arranged between the film layer where the light-emitting element is arranged and the film layer where the touch signal transmission line is arranged, and the touch display panel further comprises a retaining wall arranged in the non-display area, wherein the retaining wall comprises a second boundary and a third boundary arranged in the non-display area, the second boundary is arranged at one side of the first boundary away from the display area, and the third boundary is arranged at one side of the second boundary away from the display area; The second boundary comprises a third boundary part and a fourth boundary part which are connected with each other, the distance between the third boundary part and the first boundary part is the same as the distance between the fourth boundary part and the second boundary part, the third boundary comprises a fifth boundary part and a sixth boundary part which are connected with each other, and the distance between the fifth boundary part and the third boundary part is the same as the distance between the sixth boundary part and the fourth boundary part.
2. The touch display panel according to claim 1, wherein the fixed potential structure covers the overlapping region in a thickness direction of the touch display panel.
3. The touch display panel of claim 1, wherein the overlap region is disposed between the positive power signal extraction trace and the negative power signal extraction trace.
4. The touch display panel of claim 1, further comprising a touch signal transmission terminal, wherein the touch signal transmission trace is electrically connected to the touch signal transmission terminal through a connection via; The touch display panel further comprises a fixed potential signal transmission terminal, and the fixed potential structure is electrically connected with the fixed potential signal transmission terminal through a connecting via hole; the fixed potential signal transmission terminal and the touch signal transmission terminal are arranged on the same layer.
5. The touch display panel of claim 4, further comprising a fixed potential signal transmission trace electrically connected to the fixed potential structure and the fixed potential signal transmission terminal, respectively; The fixed potential signal transmission wiring and the touch signal transmission wiring are arranged on the same layer.
6. The touch display panel according to claim 1, further comprising a pixel circuit and a light emitting element connected to each other, wherein the touch signal transmission wiring is disposed on a side of the light emitting element away from the pixel circuit; the pixel circuit comprises a transistor and a storage capacitor, wherein the transistor comprises a grid electrode and a source electrode and a drain electrode, and the storage capacitor comprises a capacitor plate; The touch display panel further comprises a signal wiring arranged between the film layer where the pixel circuit is located and the film layer where the light-emitting element is located; And part of the data signal transmission wires are arranged on the same layer as the grid electrode, and part of the data signal transmission wires are arranged on the same layer as the capacitor electrode plate.
7. The touch display panel according to claim 1, further comprising a pixel circuit and a light emitting element connected to each other, wherein the touch signal transmission wiring is disposed on a side of the light emitting element away from the pixel circuit; The pixel circuit comprises a transistor and a storage capacitor, wherein the transistor comprises a grid electrode, and the storage capacitor comprises a capacitor plate; part of the data signal transmission wires are arranged on the same layer as the grid electrode, and part of the data signal transmission wires are arranged on the same layer as the capacitor electrode plate; the touch signal transmission wiring comprises a first touch signal transmission wiring and a second touch signal transmission wiring, the first touch signal transmission wiring is arranged on one side, close to the light-emitting element, of the second touch signal transmission wiring, and the second touch signal transmission wiring is used for transmitting touch signals in the overlapping area.
8. The touch display panel according to claim 1, wherein the fixed potential structure comprises a plurality of hollowed-out portions.
9. The touch display panel according to claim 4, wherein the fixed potential signal transmission terminal comprises a positive voltage signal transmission terminal, a negative voltage signal transmission terminal, a reference signal transmission terminal, or a ground terminal.
10. A touch display device comprising the touch display panel of any one of claims 1-9.

Description

Touch display panel and touch display device Technical Field The present invention relates to the field of display technologies, and in particular, to a touch display panel and a touch display device. Background In the prior art, an overlapping area exists between the touch signal transmission wiring and the data signal transmission wiring at a part of positions, so that mutual interference between the touch signal transmission wiring and the data signal transmission wiring in the area is caused, and normal display and touch functions of the touch display panel are affected. Disclosure of Invention The invention provides a touch display panel and a touch display device, which are used for reducing signal interference between transmission wires in the touch display panel. In a first aspect, an embodiment of the present invention provides a display panel, including a non-display area; The touch display panel further comprises a plurality of data signal transmission wires and a plurality of touch signal transmission wires, wherein the data signal transmission wires and the touch signal transmission wires are arranged in the non-display area, are arranged in different layers, and are in an overlapping area along the thickness direction of the touch display panel; The touch display panel further comprises a fixed potential structure arranged in the non-display area, the fixed potential structure is arranged between the film layer where the data signal transmission line is located and the film layer where the touch signal transmission line is located along the thickness direction of the touch display panel, and the fixed potential structure at least partially overlaps the overlapping area. In a second aspect, an embodiment of the present invention further provides a touch display device, including the touch display panel provided by any one of the embodiments of the present invention. According to the touch display panel provided by the embodiment of the invention, the fixed potential structure is arranged in the overlapping area of the data signal transmission wiring and the touch signal transmission wiring, and is arranged between the film layer where the data signal transmission wiring is positioned and the film layer where the touch signal transmission wiring is positioned along the thickness direction of the touch display panel, and the fixed potential structure at least partially overlaps with the overlapping area, so that the data signal transmission wiring and the touch signal transmission wiring are isolated and shielded in the overlapping area along the thickness direction of the touch display panel through the fixed potential structure, the mutual interference between the data signal transmission wiring and the touch signal transmission wiring is prevented, the normal transmission of signals between the transmission wirings of the touch display panel is ensured, and the display effect and the touch sensitivity are improved. Drawings Fig. 1 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of another touch display panel according to an embodiment of the invention; FIG. 3 is an enlarged schematic view of the area A of FIG. 1; FIG. 4 is a schematic view of another enlarged structure of the area A in FIG. 1; FIG. 5 is a schematic cross-sectional view taken along section line B-B' of FIG. 4; FIG. 6 is a schematic cross-sectional view taken along section line C-C' of FIG. 1; FIG. 7 is another cross-sectional schematic view taken along section line C-C' of FIG. 1; FIG. 8 is another cross-sectional schematic view taken along section line C-C' of FIG. 1; FIG. 9 is another cross-sectional schematic view taken along section line C-C' of FIG. 1; FIG. 10 is a schematic view of another enlarged construction of the area A of FIG. 1; FIG. 11 is a schematic cross-sectional view taken along section line D-D' of FIG. 2; FIG. 12 is a schematic view of another enlarged construction of the area A in FIG. 1; fig. 13 is a schematic structural diagram of a touch display device according to an embodiment of the invention. Detailed Description The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings. Fig. 1 is a schematic structural view of a touch display panel according to an embodiment of the present invention, fig. 2 is a schematic structural view of another touch display panel according to an embodiment of the present invention, fig. 3 is an enlarged structural view of a region a in fig. 1, and referring to fig. 1, 2 and 3, the touch display panel 10 includes a non-display area 110, a