Touch display panel and touch display device

Abstract

This invention discloses a touch display panel and a touch display device. The touch display panel includes multiple data signal transmission lines and multiple touch signal transmission lines disposed in a non-display area. The data signal transmission lines and touch signal transmission lines are disposed in different layers, and there is an overlapping area between them along the thickness direction of the touch display panel. The touch display panel also includes a fixed potential structure disposed in the non-display area. Along the thickness direction of the touch display panel, the fixed potential structure is disposed between the film layer containing the data signal transmission lines and the film layer containing the touch signal transmission lines, and the fixed potential structure at least partially overlaps with the overlapping area. By setting the fixed potential structure in the overlapping area between the data signal transmission lines and the touch signal transmission lines, mutual interference between the data signal transmission lines and the touch signal transmission lines in the overlapping area is prevented, thereby improving the display effect and touch recognition sensitivity.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a touch display panel and a touch display device. Background Technology

[0002] In the prior art, there are overlapping areas between touch signal transmission lines and data signal transmission lines in some locations, which causes mutual interference between the touch signal transmission lines and data signal transmission lines in these areas, affecting the normal display and touch functions of the touch display panel. Summary of the Invention

[0003] The present invention provides a touch display panel and a touch display device to reduce signal interference between transmission lines within the touch display panel.

[0004] In a first aspect, embodiments of the present invention provide a display panel, including a non-display area;

[0005] The touch display panel also includes multiple data signal transmission lines and multiple touch signal transmission lines disposed in the non-display area; the data signal transmission lines and the touch signal transmission lines are disposed in different layers, and there is an overlapping area between the data signal transmission lines and the touch signal transmission lines along the thickness direction of the touch display panel;

[0006] The touch display panel further includes a fixed potential structure disposed in the non-display area. Along the thickness direction of the touch display panel, the fixed potential structure is disposed between the film layer where the data signal transmission trace is located and the film layer where the touch signal transmission trace is located, and the fixed potential structure at least partially overlaps with the overlapping area.

[0007] Secondly, embodiments of the present invention also provide a touch display device, including a touch display panel provided in any embodiment of the present invention.

[0008] The touch display panel provided in this embodiment of the invention provides a fixed potential structure in the overlapping area of ​​the data signal transmission traces and the touch signal transmission traces. Along the thickness direction of the touch display panel, the fixed potential structure is positioned between the film layer containing the data signal transmission traces and the film layer containing the touch signal transmission traces, and the fixed potential structure at least partially overlaps with the overlapping area. This fixed potential structure isolates and shields the data signal transmission traces and the touch signal transmission traces in the overlapping area along the thickness direction of the touch display panel, preventing mutual interference between them and ensuring normal signal transmission between the traces. This improves the display effect and touch sensitivity. Attached Figure Description

[0009] Figure 1This is a schematic diagram of the structure of a touch display panel provided in an embodiment of the present invention;

[0010] Figure 2 This is a schematic diagram of another touch display panel provided in an embodiment of the present invention;

[0011] Figure 3 yes Figure 1 A magnified structural diagram of region A in the middle;

[0012] Figure 4 yes Figure 1 Another enlarged structural diagram of region A in the middle;

[0013] Figure 5 yes Figure 4 A schematic diagram of a cross-section along the section line B-B'.

[0014] Figure 6 yes Figure 1 A schematic diagram of a cross-section along the section line C-C'.

[0015] Figure 7 yes Figure 1 Another schematic diagram of a cross-section along the C-C' direction;

[0016] Figure 8 yes Figure 1 Another schematic diagram of a cross-section along the C-C' direction;

[0017] Figure 9 yes Figure 1 Another schematic diagram of a cross-section along the C-C' direction;

[0018] Figure 10 yes Figure 1 Another enlarged structural diagram of region A in the middle;

[0019] Figure 11 yes Figure 2 A schematic diagram of the cross-section along section line D-D'.

[0020] Figure 12 yes Figure 1 Another enlarged structural diagram of region A in the middle;

[0021] Figure 13 This is a schematic diagram of the structure of a touch display device provided in an embodiment of the present invention. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0023] Figure 1 This is a schematic diagram of the structure of a touch display panel provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of another touch display panel provided in an embodiment of the present invention; Figure 3 yes Figure 1 A magnified structural diagram of region A in the middle, see [link / reference]. Figure 1 , Figure 2 and Figure 3 The touch display panel 10 includes a non-display area 110, and also includes multiple data signal transmission lines 200 and multiple touch signal transmission lines 300 disposed in the non-display area 110. The data signal transmission lines 200 and the touch signal transmission lines 300 are disposed in different layers, and there is an overlapping area between the data signal transmission lines 200 and the touch signal transmission lines 300 along the thickness direction of the touch display panel 10. The touch display panel 10 also includes a fixed potential structure 400 disposed in the non-display area 110. Along the thickness direction of the touch display panel 10, the fixed potential structure 400 is disposed between the film layer where the data signal transmission lines 200 are located and the film layer where the touch signal transmission lines 300 are located, and the fixed potential structure 400 overlaps at least partially with the overlapping area.

[0024] Specifically, the touch display panel 10 includes a non-display area 110 and a display area 120, for example, refer to Figure 1 As shown, the non-display area 110 can be the lower border area located on one side of the display area 120. The display area 120 may include a light-emitting element (not specifically shown in the figure) and display signal lines, such as data signal lines, connected to the light-emitting element, for implementing the display function of the touch display panel 10. The non-display area 110 includes a data signal transmission trace 200 and a driver chip IC. The data signal transmission trace 200 can be electrically connected to both the data signal lines and the driver chip IC, thereby providing data signals to the data signal lines through the driver chip IC to drive the touch display panel 10 to achieve the display function.

[0025] Furthermore, the display area 120 may also include a touch function layer 500, which includes touch electrodes. These touch electrodes can be transparent or metal mesh electrodes, allowing light emitted from sub-pixels positioned below them to pass through them. The touch function layer 500 can be connected to a touch signal transmission line 300, receiving touch drive signals and feeding back touch sensing signals through the line, thereby enabling the touch function of the touch display panel 10.

[0026] It should be noted that the embodiments of the present invention do not limit the specific configuration of the touch function layer 500, such as... Figure 1 As shown, the touch function layer 500 can be a self-contained touch layer, or as... Figure 2 As shown, the touch function layer 500 can also be a self-capacitive touch layer. Regardless of whether it is a self-capacitive or self-capacitive touch layer, the touch function layer 500 needs to transmit touch signals through the touch signal transmission trace 300 to ensure that the touch function layer 500 can normally realize the touch function.

[0027] It should also be noted that the touch signal transmission line 300 includes a portion located in the display area 120 and a portion located in the non-display area 110. In this embodiment of the invention, the touch signal transmission line 300 refers to the portion located in the non-display area 110.

[0028] Furthermore, the data signal transmission trace 200 and the touch signal transmission trace 300 are arranged in different layers. Consequently, along the thickness direction of the touch display panel 10, there is an overlapping area between the data signal transmission trace 200 used for transmitting data signals and the touch signal transmission trace 300 used for transmitting touch signals. In some overlapping areas, there is no cathode, positive power signal lead-out trace PVDD or negative power signal lead-out trace PVEE to isolate and shield the data signal transmission trace 200 and the touch signal transmission trace 300, which will cause mutual interference between the touch signal transmission trace 300 and the data signal transmission trace 200.

[0029] To address this, a fixed potential structure 400 is provided in the overlapping area of ​​the data signal transmission trace 200 and the touch signal transmission trace 300. Along the thickness direction of the touch display panel 10, the fixed potential structure 400 is located between the film layer where the data signal transmission trace 200 is located and the film layer where the touch signal transmission trace 300 is located, and the fixed potential structure 400 overlaps with the overlapping area at least partially. In this way, the fixed potential structure 400 can isolate and shield the data signal transmission trace 200 and the touch signal transmission trace 300 in the overlapping area, preventing mutual interference between the data signal transmission trace 200 and the touch signal transmission trace 300, and ensuring normal signal transmission between the transmission traces of the touch display panel.

[0030] It should be noted that the overlapping area in this embodiment of the invention refers to the area where the data signal transmission trace 200 and the touch signal transmission trace 300 overlap along the thickness direction of the touch display panel 10, and there is no other shielding structure between the film layer containing the data signal transmission trace 200 and the film layer containing the touch signal transmission trace 300. Furthermore, the fixed potential structure 400 in this embodiment of the invention is not the positive power signal lead-out trace PVDD, the negative power signal lead-out trace PVEE, or the cathode as in existing structures. Specifically, since the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE are usually located on the second metal layer M2 and are connected to different fixed potential signals, there is a certain gap between the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE. At this gap, the data signal transmission trace 200 and the touch signal transmission trace 300 overlap along the thickness direction of the touch display panel. Since there is no fixed potential structure 400 at this gap, it is impossible to isolate and shield the mutual interference between the data signal transmission trace 200 and the touch signal transmission trace 300. Similarly, along the thickness direction of the touch display panel 10, there is a gap between the projection of the cathode and the projection of the positive power signal lead-out trace PVDD or the negative power signal lead-out trace PVEE. At this gap, it is impossible to isolate and shield the data signal transmission trace 200 and the touch signal transmission trace 300. Therefore, the fixed potential structure 400 is not the positive power signal lead-out trace PVDD, the negative power signal lead-out trace PVEE, or the cathode in the existing structure. Instead, it is set in the gap area between the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE, or in the gap area between the positive power signal lead-out trace PVDD and the cathode, or in the gap area between the negative power signal lead-out trace PVEE and the cathode. Moreover, in the thickness direction of the display panel, it overlaps with both the data signal transmission trace 200 and the touch signal transmission trace 300. A fixed potential signal is transmitted in this structure.

[0031] In summary, this embodiment of the invention provides a fixed potential structure in the overlapping area of ​​the data signal transmission traces and the touch signal transmission traces. Along the thickness direction of the touch display panel, the fixed potential structure is located between the film layer containing the data signal transmission traces and the film layer containing the touch signal transmission traces, and the fixed potential structure at least partially overlaps with the overlapping area. This fixed potential structure effectively isolates and shields the overlapping area of ​​the data signal transmission traces and the touch signal transmission traces, preventing mutual interference between them and ensuring normal signal transmission between the traces of the touch display panel.

[0032] It should also be noted that the fixed potential structure 400 can be set on the film layer where the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE are located, but it is necessary to ensure that the setting of the fixed potential structure 400 will not cause the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE to be electrically connected, that is, to ensure that the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE can transmit the fixed potential signal normally.

[0033] Optional, Figure 4 yes Figure 1 See another enlarged structural diagram of region A in the middle. Figure 4 Along the thickness direction of the touch display panel 10, the fixed potential structure 400 can cover the overlapping area. Specifically, along the thickness direction of the touch display panel 10, the fixed potential structure 400 is located between the film layer where the data signal transmission line 200 is located and the film layer where the touch signal transmission line 300 is located, and the fixed potential structure 400 can completely cover the overlapping area. In this way, the overlapping area of ​​the data signal transmission line 200 and the touch signal transmission line 300 can be completely isolated and shielded by the fixed potential structure 400, further preventing mutual interference between the data signal transmission line 200 and the touch signal transmission line 300, and ensuring the normal transmission of signals between the transmission lines of the touch display panel.

[0034] Based on the above embodiments, see below. Figure 3 and Figure 4 The touch display panel 10 also includes a positive power signal lead-out trace PVDD and a negative power signal lead-out trace PVEE disposed in the non-display area 110, with the overlapping area disposed between the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE.

[0035] Specifically, the positive power signal lead-out trace (PVDD) refers to the trace that leads out a positive power signal. Multiple positive power signal lines (not shown in the figure) are also provided within the display area. Taking a light-emitting diode (LED) display panel as an example, the positive power signal lines are electrically connected to the positive power signal lead-out trace (PVDD) and the anode of the LED, respectively. The negative power signal lead-out trace (PVEE) refers to the trace that leads out a negative power signal. Multiple negative power signal lines (not shown in the figure) are also provided within the display area. Taking an LED display panel as an example, the negative power signal lines are electrically connected to the negative power signal lead-out trace (PVDD) and the cathode of the LED, respectively. Furthermore, the positive power signal lead-out trace (PVDD) and the negative power signal lead-out trace (PVEE) can be arranged in the same layer and are both located between the film layer containing the data signal transmission trace 200 and the film layer containing the touch signal transmission trace 300. Therefore, the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE can serve as isolation and shielding between the data signal transmission trace 200 and the touch signal transmission trace 300. However, since there is a certain gap between the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE, and the mutual interference between the data signal transmission trace 200 and the touch signal transmission trace 300 at the gap cannot be isolated and shielded, the fixed potential structure 400 can be set only at the gap between the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE, that is, the overlapping area is set between the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE, so as to fully shield the interference between the data signal transmission trace 200 and the touch signal transmission trace 300.

[0036] It should be noted that, in order to ensure that the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE can transmit the fixed potential signal normally, when the fixed potential structure 400 is set on the same layer as the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE, the fixed potential structure 400 is not electrically connected to the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE at the same time, or the fixed potential structure 400 is not electrically connected to either the positive power signal lead-out trace PVDD or the negative power signal lead-out trace PVEE. For example, when a positive power signal is transmitted on the fixed potential structure 400, a gap is provided between the fixed potential structure and the negative power signal lead-out trace PVEE; as another example, when a negative power signal is transmitted on the fixed potential structure 400, a gap is provided between the fixed potential structure and the positive power signal lead-out trace PVDD; as yet another example, when both non-positive and non-negative power signals are transmitted on the fixed potential structure 400, gaps are provided between the fixed potential structure and both the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE to prevent short circuits between signals of different potentials.

[0037] Optional, see below Figure 4 As shown, the touch display panel 10 also includes a touch signal transmission terminal 310. The touch signal transmission trace 300 is electrically connected to the touch signal transmission terminal 310 through a connection via. The touch display panel 10 also includes a fixed potential signal transmission terminal 410. The fixed potential structure 400 is electrically connected to the fixed potential signal transmission terminal 410 through a connection via. The fixed potential signal transmission terminal 410 and the touch signal transmission terminal 310 are arranged on the same layer.

[0038] Specifically, the touch signal transmission trace 300 is electrically connected to the touch signal transmission terminal 310 via a downward-facing via. The touch signal transmission terminal 310 can be electrically connected to the driver chip IC. The driver chip IC can then provide touch signals to the touch function layer 500 and receive touch signals sensed in the touch function layer 500 through the touch signal transmission terminal 310 and the touch signal transmission trace 300. Simultaneously, the touch display panel provided in this embodiment may also include a fixed-potential signal transmission terminal 410. The fixed-potential structure 400 is electrically connected to the fixed-potential signal transmission terminal 410 via a connection via. The fixed-potential signal transmission terminal 410 can be electrically connected to the driver chip IC. The driver chip IC can then provide a fixed-potential signal to the fixed-potential structure 400 through the fixed-potential signal transmission terminal 410, thereby ensuring that the fixed-potential structure 400 can prevent mutual interference between the data signal transmission trace 200 and the touch signal transmission trace 300. Furthermore, the fixed potential signal transmission terminal 410 can be disposed on the same layer and in the same area as the touch signal transmission terminal 310. In this way, during manufacturing, the touch signal transmission terminal 310 and the fixed potential signal transmission terminal 410 can be formed in the same process using the same mask, eliminating the need to make separate masks for the touch signal transmission terminal 310 and the fixed potential signal transmission terminal 410, thus saving costs, reducing the number of processes, and improving production efficiency.

[0039] Optionally, based on the above embodiments, the fixed potential signal transmission terminal 410 includes a positive voltage signal transmission terminal, a negative voltage signal transmission terminal, a reference signal transmission terminal, or a ground terminal. The driver chip can then provide a positive voltage signal, a negative voltage signal, a reference signal, or a ground signal to the fixed potential structure 400 through the fixed potential signal transmission terminal 410, thereby ensuring that the fixed potential structure 400 can isolate and shield the data signal transmission trace 200 from the touch signal transmission trace 300, preventing mutual interference between the data signal transmission trace 200 and the touch signal transmission trace 300. Furthermore, the positive voltage signal, negative voltage signal, reference signal, or ground signal are all fixed potential signals that need to be transmitted during the normal operation of the display panel. By setting the fixed potential signal transmission terminal 410 to include a positive voltage signal transmission terminal, a negative voltage signal transmission terminal, a reference signal transmission terminal, or a ground terminal, the configuration of the fixed potential signal transmission terminal can be kept simple.

[0040] Optional, Figure 5 yes Figure 4 A schematic diagram of a cross-section along section line B-B', see [reference]. Figure 4 and Figure 5 The touch display panel 10 also includes a fixed potential signal transmission line 420, which is electrically connected to the fixed potential structure 400 and the fixed potential signal transmission terminal 410 respectively. The fixed potential signal transmission line 420 is arranged on the same layer as the touch signal transmission line 300.

[0041] Specifically, the fixed-potential signal transmission trace 420 is electrically connected to both the fixed-potential structure 400 and the fixed-potential signal transmission terminal 410, transmitting the fixed-potential signal to the fixed-potential structure 400 through the fixed-potential signal transmission terminal 410. This ensures that the fixed-potential structure 400 can prevent mutual interference between the data signal transmission trace 200 and the touch signal transmission trace 300. Furthermore, since the fixed-potential signal transmission trace 420 and the touch signal transmission trace 300 are located on the same film layer, they can be fabricated using the same mask in the same process, eliminating the need for separate masks for each trace. This saves costs, reduces the number of processes, and improves production efficiency.

[0042] Based on the above embodiments, the position of the fixed potential structure 400 will be specifically described below with reference to the accompanying drawings.

[0043] Figure 6 yes Figure 1 A schematic diagram of a cross-section along the section line C-C'. Figure 7 yes Figure 1 Another schematic diagram of a cross-section along the C-C' direction. Figure 8 yes Figure 1 Another schematic diagram of a cross-section along the C-C' direction. Figure 9 yes Figure 1 Another schematic diagram of a cross-section along the C-C' direction, combined with... Figure 1 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, the touch display panel 10 also includes a pixel circuit 600 and a light-emitting element 700 connected to each other. The touch signal transmission line 300 is disposed on the side of the light-emitting element 700 away from the pixel circuit 600. The pixel circuit 600 includes a transistor 610 and a storage capacitor 620. The transistor 610 includes a gate 6101 and a source / drain 6102. The storage capacitor 620 includes a capacitor plate 6201. The light-emitting element 700 includes a first electrode 710 and a second electrode 720. The touch display panel 10 also includes a signal wiring 730 disposed between the film layer where the pixel circuit 600 is located and the film layer where the light-emitting element 700 is located. Some data signal transmission lines 200 are disposed on the same layer as the gate 6101, and some data signal transmission lines 200 are disposed on the same layer as the capacitor plate 6201. The fixed potential structure 400 is disposed on the same layer as the source / drain 6102, the signal wiring 730, the first electrode 710, or the second electrode 720.

[0044] Specifically, such as Figures 6-9 As shown, the pixel circuit 600 includes a transistor 610 and a storage capacitor 620. The transistor 610 includes a gate 6101 and a source / drain 6102. The storage capacitor 620 includes a capacitor substrate 6201, which includes an upper capacitor substrate 6201a and a lower capacitor substrate 6201b. The lower capacitor substrate 6201b can be disposed on the same layer as the gate 6101, or the gate 6101 can be reused as the lower capacitor substrate 6201b. Furthermore, to reduce crosstalk between adjacent data signal transmission lines and reduce the space occupied by the data signal transmission lines, adjacent data signal transmission lines can be disposed on different film layers. For example, some data signal transmission lines 200 can be disposed on the same layer as the gate 6101, and some data signal transmission lines 200 can be disposed on the same layer as the capacitor plate 6201. Based on the arrangement of the data signal transmission lines 200 and the touch signal transmission lines 300, the fixed potential structure 400 can be disposed on the same layer as the source / drain 6102, such as... Figure 6 As shown. Thus, during fabrication, the fixed potential structure 400 and the source / drain electrode 6102 can be formed using the same mask in the same fabrication process, eliminating the need to fabricate separate masks for the fixed potential structure 400 and the source / drain electrode 6102, saving costs, reducing the number of processes, and improving production efficiency.

[0045] It should be noted that since the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE can be arranged on the same layer as the source and drain terminals, when the fixed potential structure 400 is arranged on the same layer as the source and drain terminals 6102, it is necessary to ensure that the fixed potential structure 400 is not electrically connected to the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE at the same time, or that the fixed potential structure 400 is not electrically connected to either the positive power signal lead-out trace PVDD or the negative power signal lead-out trace PVEE, thereby ensuring that the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE can transmit the fixed potential signal normally.

[0046] Specifically, such as Figure 1 and Figure 7 As shown, the touch display panel 10 also includes signal wiring 730 disposed between the film layer where the pixel circuit 600 is located and the film layer where the light-emitting element 700 is located. The signal wiring can be a signal trace in FIAA (fanout in AA) technology or can serve as a bridging layer between the pixel circuit 610 and the light-emitting element 700. This avoids the need for deep vias when electrically connecting the light-emitting element 700 and the pixel circuit 610, ensuring a simple and stable connection between them. By placing the fixed potential structure 400 and the signal wiring 730 on the same layer, they can be fabricated using the same mask in the same process, eliminating the need for separate masks for each structure, reducing the number of processes, and improving production efficiency.

[0047] Optional, see Figure 1 , Figure 8 and Figure 9 The light-emitting element 700 includes a first electrode 710 and a second electrode 720, wherein the first electrode 710 is the anode and the second electrode 720 is the cathode. Since both the first electrode 710 and the second electrode 720 are located between the film layer containing the data signal transmission trace 200 and the film layer containing the touch signal transmission trace 300, the fixed potential structure 400 can be disposed in the same layer as the first electrode 710, or the fixed potential structure 400 can be disposed in the same layer as the second electrode 720. Thus, during fabrication, the fixed potential structure 400 and the first electrode 710 (anode) can be formed using the same mask in the same fabrication process, eliminating the need to fabricate separate masks for the fixed potential structure 400 and the first electrode 710 (anode), saving costs, reducing the number of processes, and improving production efficiency. Alternatively, as... Figure 9As shown, the fixed potential structure 400 and the second electrode 720 (cathode) are arranged in the same layer. In this way, during the fabrication process, the fixed potential structure 400 and the second electrode 720 (cathode) can be formed in the same process using the same mask, without the need to make separate masks for the fixed potential structure 400 and the second electrode 720 (cathode), which saves costs, reduces the number of processes, and improves production efficiency.

[0048] Based on the above embodiments, Figure 10 yes Figure 1 Another enlarged structural diagram of region A in the middle; see also... Figure 1 , Figure 9 and Figure 10 As shown, the fixed potential structure 400 is integrally disposed with the second electrode 720. The film layer where the second electrode 720 is located includes a first boundary 111 disposed in the non-display area 110. The first boundary 111 includes a first boundary portion 111a and a second boundary portion 111b connected to each other. The first boundary portion 111a is disposed on the side of the second boundary portion 111b away from the display area 120. The fixed potential structure 400 includes the first boundary portion 111a, and the second electrode 720 includes the second boundary portion 111b. The touch display panel 10 also includes an encapsulation layer 900 disposed between the film layer where the light-emitting element 700 is located and the film layer where the touch signal transmission line 300 is located. The touch display panel 10 also includes a barrier 800 disposed in the non-display area 110. The barrier 800 includes the second boundary 800. 10. The encapsulation layer 900 includes a third boundary 910 disposed in the non-display area 110, a second boundary 810 disposed on the side of the first boundary 111 away from the display area 120, and a third boundary 910 disposed on the side of the second boundary 810 away from the display area 120. The second boundary 810 includes a third boundary portion 810a and a fourth boundary portion 810b connected to each other. The distance between the third boundary portion 810a and the first boundary portion 111a is the same as the distance between the fourth boundary portion 810b and the second boundary portion 111b. The third boundary 910 includes a fifth boundary portion 910a and a sixth boundary portion 910b connected to each other. The distance between the fifth boundary portion 910a and the third boundary portion 810a is the same as the distance between the sixth boundary portion 910b and the fourth boundary portion 810b.

[0049] Specifically, such as Figure 10As shown, the fixed potential structure 400 and the second electrode 720 are integrally disposed. This can be understood as follows: the second electrode 720, originally located entirely on the second boundary portion 111b, is positioned at the interval corresponding to the spacing between the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE. The fixed potential structure 400 extends from this position to the first boundary portion 111a, making the fixed potential structure 400 and the second electrode 720 a single unit. The first boundary portion 111a is located on the side of the second boundary portion 111b furthest from the display area 120. In the outermost touch signal transmission trace 300, the left side portion can be shielded by the positive power signal lead-out trace PVDD, and the interval between the positive power signal lead-out trace PVDD and the negative power signal lead-out trace PVEE can be shielded by the fixed potential structure 400 including the first boundary portion 111a. The right side portion can be shielded by the negative power signal lead-out trace PVEE, thereby completely isolating and shielding the data signal transmission trace 200 and the touch signal transmission trace 300, preventing mutual interference between the data signal transmission trace 200 and the touch signal transmission trace 300.

[0050] In addition, the touch display panel 10 also includes an encapsulation layer 900 disposed between the film layer containing the light-emitting element 700 and the film layer containing the touch signal transmission line 300, and a barrier 800 disposed in the non-display area 110. The barrier 800 includes a second boundary 810, and the encapsulation layer 900 includes a third boundary 910 disposed in the non-display area 110. Since the second electrode 720 forms the first boundary 111 through the integrated fixed potential structure 400, the boundary between the barrier 800 and the encapsulation layer 900 also needs to be defined. The second boundary 810 is adjusted such that it includes a third boundary portion 810a and a fourth boundary portion 810b that are connected to each other, the distance between the third boundary portion 810a and the first boundary portion 111a is the same as the distance between the fourth boundary portion 810b and the second boundary portion 111b, and the third boundary 910 includes a fifth boundary portion 910a and a sixth boundary portion 910b that are connected to each other, the distance between the fifth boundary portion 910a and the third boundary portion 810a is the same as the distance between the sixth boundary portion 910b and the fourth boundary portion 810b.

[0051] Figure 11 yes Figure 2 See the schematic diagram of the cross-section along section line D-D'. Figure 2 and Figure 11The touch display panel 10 also includes interconnected pixel circuits 600 and light-emitting elements 700. Touch signal transmission lines 300 are disposed on the side of the light-emitting element 700 away from the pixel circuits 600. The pixel circuit 600 includes transistors 610 and storage capacitors 620. Transistor 610 includes a gate 6101 and source / drain electrodes 6102. Storage capacitor 620 includes capacitor plates 6201. Some of the data signal transmission lines are disposed on the same layer as the gate, and some data signal transmission lines 200 are disposed on the same layer as the gate 6101. 01. In the same layer, some data signal transmission traces 200 and capacitor plates 6201 are arranged in the same layer. The touch signal transmission traces 300 include a first touch signal transmission trace 310 and a second touch signal transmission trace 320. The first touch signal transmission trace 310 is arranged on the side of the second touch signal transmission trace 320 close to the light-emitting element 700. In the overlapping area, the second touch signal transmission trace 320 is used to transmit touch signals. The fixed potential structure 400 is arranged in the same layer as the first touch signal transmission trace 710.

[0052] Specifically, such as Figure 2 and Figure 11As shown, the pixel circuit 600 includes a transistor 610 and a storage capacitor 620. The transistor 610 includes a gate 6101 and a source / drain electrode 6102. The storage capacitor 620 includes a capacitor substrate 6201, which includes an upper capacitor substrate 6201a and a lower capacitor substrate 6201b. The lower capacitor substrate can be disposed on the same layer as the gate 6201, or the gate 6101 can be reused as the lower capacitor substrate 6201b. Furthermore, in order to reduce crosstalk between two adjacent data signal transmission traces and reduce the space occupied by the data signal transmission traces, the two adjacent data signal transmission traces can be disposed on different film layers. For example, some data signal transmission traces 200 can be disposed on the same layer as the gate 6101, and some data signal transmission traces 200 can be disposed on the same layer as the capacitor electrode 6201. Furthermore, the touch function layer 500 can also be a touch layer with a mutual capacitance structure. The touch layer includes a touch driving electrode and a touch sensing electrode. The touch signal transmission line 300 includes a first touch signal transmission line 310 and a second touch signal transmission line 320. The first touch signal transmission line 310 can be electrically connected to the touch driving electrode, and the second touch signal transmission line 320 can be electrically connected to the touch sensing electrode. The first touch signal transmission line 310 is disposed on the side of the second touch signal transmission line 320 closest to the light-emitting element 700. In the overlapping area, the second touch signal transmission line 320 is used to transmit touch signals. Since the first touch signal transmission line 310 is disposed between the second touch signal transmission line 320 (used for transmitting touch signals) and the data signal transmission line 200, the fixed potential structure 400 can be disposed on the same layer as the first touch signal transmission line 310. This ensures that the fixed potential structure 400 can prevent mutual interference between the data signal transmission trace 200 and the touch signal transmission trace 300. In addition, since the fixed potential structure 400 and the first touch signal transmission trace 310 are located on the same film layer, they can be fabricated using the same mask in the same process during manufacturing. This eliminates the need to fabricate separate masks for the fixed potential structure 400 and the first touch signal transmission trace 310, saving costs, reducing the number of processes, and improving production efficiency.

[0053] Based on the above embodiments, Figure 12 yes Figure 1 See another enlarged structural diagram of region A in the middle. Figure 12 The fixed potential structure 400 includes multiple hollowed-out portions 430.

[0054] Specifically, such as Figure 12As shown, the fixed potential structure 400 includes a plurality of hollow portions 430. Along the thickness direction of the touch display panel 10, the plurality of hollow portions 430 penetrate the fixed potential structure 400 to release the stress of the fixed potential structure and thereby prevent the fixed potential structure 400 from falling off.

[0055] It should be noted that when the fixed potential structure 400 includes multiple cutouts 430, the cutouts 430 are positioned offset from the touch signal transmission traces 300 along the thickness direction of the display panel. In other words, the cutouts 430 do not affect the shielding between the touch signal transmission traces 300 and the data signal transmission traces, thus ensuring the normal shielding function of the fixed potential structure 400.

[0056] Based on the same inventive concept, embodiments of the present invention also provide a touch display device. Figure 13 This is a schematic diagram of the structure of a touch display device provided in an embodiment of the present invention, as shown below. Figure 13 As shown, the touch display device includes the touch display panel 13 described in any of the above embodiments. Therefore, the touch display device provided by the embodiments of the present invention has the corresponding beneficial effects of the above embodiments, which will not be repeated here. For example, the touch display device can be an electronic device such as a mobile phone, computer, smart wearable device (e.g., smartwatch), and in-vehicle display device, and the embodiments of the present invention do not limit it in this regard.

[0057] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A touch display panel, characterized in that, Including non-display areas; The touch display panel also includes multiple data signal transmission lines and multiple touch signal transmission lines disposed in the non-display area; the data signal transmission lines and the touch signal transmission lines are disposed in different layers, and there is an overlapping area between the data signal transmission lines and the touch signal transmission lines along the thickness direction of the touch display panel; The touch display panel further includes a fixed potential structure disposed in the non-display area. Along the thickness direction of the touch display panel, the fixed potential structure is disposed between the film layer where the data signal transmission line is located and the film layer where the touch signal transmission line is located, and the fixed potential structure at least partially overlaps with the overlapping area. The touch display panel also includes positive power signal lead-out traces and negative power signal lead-out traces disposed in the non-display area. Along the thickness direction of the touch display panel, at least a portion of the positive power signal lead-out traces and negative power signal lead-out traces are located between the data signal transmission traces and the touch signal transmission traces. The positive power signal lead-out trace and the negative power signal lead-out trace are separated by a gap, and the fixed potential structure is located in the gap; The touch display panel includes a light-emitting element, and the light-emitting element includes a second electrode; The fixed potential structure is integrally disposed with the second electrode. The film layer where the second electrode is located includes a first boundary disposed in the non-display area. The first boundary includes a first boundary portion and a second boundary portion that are connected to each other. The first boundary portion is disposed on the side of the second boundary portion away from the display area. The fixed potential structure includes the first boundary portion, and the second electrode includes the second boundary portion. The touch display panel further includes an encapsulation layer disposed between the film layer containing the light-emitting element and the film layer containing the touch signal transmission line. The touch display panel also includes a barrier wall disposed in the non-display area. The barrier wall includes a second boundary, and the encapsulation layer includes a third boundary disposed in the non-display area. The second boundary is disposed on the side of the first boundary away from the display area, and the third boundary is disposed on the side of the second boundary away from the display area. The second boundary includes a third boundary portion and a fourth boundary portion that are connected to each other, and the distance between the third boundary portion and the first boundary portion is the same as the distance between the fourth boundary portion and the second boundary portion; the third boundary includes a fifth boundary portion and a sixth boundary portion that are connected to each other, and the distance between the fifth boundary portion and the third boundary portion is the same as the distance between the sixth boundary portion and the fourth boundary portion.

2. The touch display panel according to claim 1, characterized in that, Along the thickness direction of the touch display panel, the fixed potential structure covers the overlapping area.

3. The touch display panel according to claim 1, characterized in that, The overlapping area is located between the positive power signal lead-out trace and the negative power signal lead-out trace.

4. The touch display panel according to claim 1, characterized in that, The touch display panel also includes a touch signal transmission terminal, and the touch signal transmission trace is electrically connected to the touch signal transmission terminal through a connection via; The touch display panel also includes a fixed potential signal transmission terminal, and the fixed potential structure is electrically connected to the fixed potential signal transmission terminal through a connection via. The fixed potential signal transmission terminal is disposed on the same layer as the touch signal transmission terminal.

5. The touch display panel according to claim 4, characterized in that, The touch display panel also includes a fixed potential signal transmission line, which is electrically connected to the fixed potential structure and the fixed potential signal transmission terminal respectively. The fixed potential signal transmission trace is arranged on the same layer as the touch signal transmission trace.

6. The touch display panel according to claim 1, characterized in that, The touch display panel also includes interconnected pixel circuits and light-emitting elements, and the touch signal transmission lines are located on the side of the light-emitting elements away from the pixel circuits; The pixel circuit includes a transistor and a storage capacitor. The transistor includes a gate and a source / drain, and the storage capacitor includes a capacitor plate. The light-emitting element includes a first electrode and a second electrode. The touch display panel also includes signal wiring disposed between the film layer where the pixel circuit is located and the film layer where the light-emitting element is located; Some of the data signal transmission traces are disposed on the same layer as the gate, and some of the data signal transmission traces are disposed on the same layer as the capacitor plates.

7. The touch display panel according to claim 1, characterized in that, The touch display panel also includes interconnected pixel circuits and light-emitting elements, and the touch signal transmission lines are located on the side of the light-emitting elements away from the pixel circuits; The pixel circuit includes a transistor and a storage capacitor. The transistor includes a gate, and the storage capacitor includes a capacitor plate. Some of the data signal transmission traces are disposed on the same layer as the gate, and some of the data signal transmission traces are disposed on the same layer as the capacitor plate. The touch signal transmission trace includes a first touch signal transmission trace and a second touch signal transmission trace. The first touch signal transmission trace is disposed on the side of the second touch signal transmission trace close to the light-emitting element. In the overlapping area, the second touch signal transmission trace is used to transmit touch signals.

8. The touch display panel according to claim 1, characterized in that, The fixed potential structure includes multiple hollow sections.

9. The touch display panel according to claim 4, characterized in that, The fixed potential signal transmission terminal includes 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, characterized in that, Includes the touch display panel as described in any one of claims 1-9.

Images