Touch display panel and display device

Abstract

The embodiment of the application discloses a touch display panel and a display device, the touch display panel comprises a display area and a frame area located at one side of the display area, the frame area comprises a dam setting area, and at least one dam structure is arranged in the dam setting area; the touch display panel further comprises a touch layer and a signal transmission layer, the touch layer and the signal transmission layer are electrically connected through a connecting via, and the connecting via is arranged between the dam setting area and the display area. By arranging the connecting via between the dam setting area and the display area, the stable connection of the touch layer and the signal transmission layer can be ensured, meanwhile, the distance between the dam setting area and the frame area can be saved, and the display effect of a narrow frame can be realized.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of display, in particular to a touch display panel and a display device. BACKGROUND

[0002] With the rapid development of display technology, touch display panels are widely used. The touch display panel combines a touch panel and a display panel, so that the display panel has the functions of display and sensing touch input. In order to realize the touch function, a cross-connection between different film layers is generally required, and thus some problems exist. SUMMARY

[0003] Embodiments of the present application provide a touch display panel and a display device, which adjust the setting position of the connection via to realize the display effect of narrow frame.

[0004] In a first aspect, embodiments of the present application provide a touch display panel, which comprises a display area and a frame area located on one side of the display area, the frame area comprises a barrier wall setting area, and the barrier wall setting area is provided with at least one barrier wall structure.

[0005] The touch display panel further comprises a touch layer and a signal transmission layer, the touch layer and the signal transmission layer are electrically connected through a connection via, and the connection via is arranged between the barrier wall setting area and the display area.

[0006] In a second aspect, embodiments of the present application provide a touch display device, which comprises the touch display panel of any one of the first aspect.

[0007] The touch display panel provided by the embodiments of the present application has the advantages that the touch layer and the signal transmission layer are electrically connected through the connection via, and the connection via is arranged between the barrier wall setting area and the display area. On the premise of ensuring the stable connection of the touch layer and the signal transmission layer, the distance between the barrier wall setting area and the frame area can be reduced by adjusting the setting position of the connection via, which is beneficial to realize the display effect of narrow frame. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present application, the drawings needed in the description of the embodiments are briefly introduced below. Obviously, the drawings introduced are only a part of the drawings of the present application to be described, and not all the drawings. Those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0009] Figure 1 is a structural schematic diagram of a touch display panel in the prior art;

[0010] Figure 2is a structural schematic diagram of a touch display panel provided by an embodiment of the present application;

[0011] Figure 3 is Figure 2 is a structural schematic diagram along section line AA' in the foregoing embodiment;

[0012] Figure 4 is a structural schematic diagram of another touch display panel provided by an embodiment of the present application;

[0013] Figure 5 is a structural schematic diagram of another touch display panel provided by an embodiment of the present application;

[0014] Figure 6 is a structural schematic diagram of another touch display panel provided by an embodiment of the present application;

[0015] Figure 7 is Figure 2 is a structural schematic diagram along section line BB' in the foregoing embodiment;

[0016] Figure 8 is a structural schematic diagram of another touch display panel provided by an embodiment of the present application;

[0017] Figure 9 is a structural schematic diagram of another touch display panel provided by an embodiment of the present application;

[0018] Figure 10 is Figure 9 is an enlarged structural schematic diagram at C in the foregoing embodiment;

[0019] Figure 11 is Figure 9 is another enlarged structural schematic diagram at C in the foregoing embodiment;

[0020] Figure 12 is a structural schematic diagram of another touch display panel provided by an embodiment of the present application;

[0021] Figure 13 is Figure 12 is a structural schematic diagram along section line DD' in the foregoing embodiment;

[0022] Figure 14 is Figure 2 is another structural schematic diagram along section line AA' in the foregoing embodiment;

[0023] Figure 15 is Figure 2 is another structural schematic diagram along section line AA' in the foregoing embodiment;

[0024] Figure 16 is Figure 2 is another structural schematic diagram along section line AA' in the foregoing embodiment;

[0025] Figure 17 is a structural schematic diagram of a touch display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0026] The present application will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended for the purpose of interpretation of the present application and are not limiting of the present application. In addition, it should be noted that, for the purpose of description, only the parts related to the present application are shown in the accompanying drawings and not all the structures.

[0027] Figure 1 is a structural schematic diagram of a touch display panel in the prior art, as shown in Figure 1 The touch display panel includes a display area 100' and a frame area 200', and further includes a barrier wall area 210' and a connecting via 330' in the frame area 200'. The barrier wall area 210' is provided with a barrier wall structure for blocking the organic film layer and the inorganic film layer in the encapsulation layer, so as to avoid the influence of external water vapor or oxygen and other factors on the display area 100' through the encapsulation layer, and to avoid affecting the display effect of the display area 100'. The display panel further includes a touch structure (not shown in the figure), and the connecting via 330' is used to ensure that the touch structure in the touch display panel is electrically connected with the array substrate, so as to realize the touch function. However, due to the actual process fluctuation in the preparation of the encapsulation layer in the touch display panel, for example, the inorganic layer in the encapsulation layer is generally prepared by a chemical vapor deposition (CVD) process. Due to the process fluctuation, i.e. CVD shadow, in the preparation process, the process fluctuation range can be about 210 μm. In order to avoid the influence of the encapsulation layer on the connecting via 330', at least a range corresponding to the process fluctuation range needs to be reserved between the connecting via 330' and the encapsulation layer boundary C', which results in a large lower frame of the display panel, and is not conducive to realizing the narrow frame display effect of the touch display panel.

[0028] To solve the above problems, an embodiment of the present application provides a touch display panel, which includes a display area and a frame area located on one side of the display area. The frame area includes a barrier wall setting area, and the barrier wall setting area is provided with at least one barrier wall structure. The touch display panel further includes a touch layer and a signal transmission layer, and the touch layer and the signal transmission layer are electrically connected through a connecting via. The connecting via is arranged between the barrier wall setting area and the display area. By using the above technical solution, the connecting via is arranged between the barrier wall setting area and the display area, which can ensure the stable connection of the touch layer and the signal transmission layer, and can also save the distance between the barrier wall setting area and the frame area, which is conducive to realizing the narrow frame display effect.

[0029] The above is the core idea of ​​this invention. The technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0030] Figure 2 This is a schematic diagram of the structure of a touch display panel provided in an embodiment of the present invention. Figure 3 yes Figure 2 A structural schematic diagram along the central section line AA', for reference. Figure 2 and Figure 3 As shown, the touch display panel 10 provided in this embodiment of the invention includes a display area 100 and a frame area 200 located on one side of the display area 100. The frame area 200 includes a barrier setting area 210, and the barrier setting area 210 is provided with at least one barrier structure 211. The touch display panel 10 also includes a touch layer 310 and a signal transmission layer 320. The touch layer 310 and the signal transmission layer 320 are electrically connected through a connection via 330, which is disposed between the barrier setting area 210 and the display area 100.

[0031] Among them, reference Figure 2 As shown, the touch display panel 10 includes a display area 100 and a bezel area 200. The display area 100 is used to realize the display and touch effects of the touch display panel 10, and the bezel area 200 provides the space required by peripheral devices and is used to provide the display signals and touch signals required by the touch display panel 10. Specifically, refer to... Figure 2 and Figure 3 As shown, the border area 200 also includes a barrier setting area 210, which is provided with at least one set of barrier structures 211. The barrier structures 211 are used to prevent the organic and inorganic layers in the encapsulation layer from extending further towards the boundary of the border area 200. Since the organic layer has a good ability to absorb water and oxygen, the at least one set of barrier structures 211 in the barrier setting area 210 can prevent the organic layer from extending to the boundary of the border area 200, thus preventing water vapor or oxygen from extending along the organic layer to the display area 100, thereby ensuring the encapsulation effect of the touch display panel 10 and ensuring that the touch display panel 10 has normal display and touch functions. For example, refer to... Figure 2 and Figure 3As shown, the embodiment of the present application takes two barrier wall structures 211 as an example to illustrate the barrier wall setting area 210. The first barrier wall structure close to the display area 100 can be used to prevent the organic layer from extending to the frame area 200, and the second barrier wall structure can be used to prevent the inorganic layer from extending to the frame area 200. The setting of multiple barrier wall structures 211 can more securely and stably avoid the extension of the encapsulation layer, and ensure the encapsulation effect of the touch display panel 10.

[0032] The touch display panel 10 further includes a touch layer 310 and a signal transmission layer 320. The touch layer 310 is a film layer for realizing the touch function. The touch layer 310 can specifically include a touch electrode and a touch trace (not shown in the figure). The touch electrode is used to receive a touch driving signal and generate a touch sensing signal based on external touch. The touch trace is used to transmit the touch driving signal and the touch sensing signal to a touch chip, so that the touch chip can know the touch position and / or the touch pressure. The signal transmission layer 320 can serve as a transmission bridge between the touch trace and the touch chip. One end of the signal transmission layer 320 is electrically connected to the touch trace through a connection via 330, and the other end is electrically connected to the touch chip. The signal transmission layer 320 realizes the transmission of the touch driving signal output by the touch chip to the touch trace, and the transmission of the touch sensing signal transmitted by the touch trace to the touch chip, thereby realizing the touch function of the touch display panel 10.

[0033] Further, compared with the prior art in which the connection via is arranged on the side of the barrier wall setting area 210 away from the display area 100, the embodiment of the present application creatively arranges the connection via 330 between the display area 100 and the barrier wall setting area 210. In this way, the space between the connection via 330 and the edge of the encapsulation layer does not need to be reserved due to the preparation process fluctuation of the encapsulation layer, the space of the frame area 200 is reduced, and the display effect of the narrow frame of the touch display panel 10 is better realized. At the same time, since the barrier wall structure 211 in the barrier wall setting area 210 has a large step difference, by arranging the connection via 330 between the display area 100 and the barrier wall setting area 210, the touch layer 310 can be prevented from climbing, and the disconnection problem caused by climbing can be avoided, thereby ensuring the stable connection between the touch layer 310 and the signal transmission layer 320.

[0034] In summary, the touch display panel provided by the embodiment of the present application arranges the connection via between the barrier wall setting area and the display area, which can ensure the stable connection between the touch layer and the signal transmission layer, and at the same time, the space between the connection via and the edge of the encapsulation layer does not need to be reserved due to the preparation process fluctuation of the encapsulation layer, the space of the frame area is reduced, and the display effect of the narrow frame of the touch display panel is better realized.

[0035] Figure 4 is a structural schematic diagram of another touch display panel provided by the embodiment of the present application,Figure 5 is another structural schematic diagram of a touch display panel provided by an embodiment of the present application, referring to Figures 3 to 5 As shown in the figure, the touch layer 310 includes a plurality of touch wires 311; the signal transmission layer 320 includes a plurality of touch signal transmission wires 321, and the touch signal transmission wire 321 is electrically connected with the touch wire 311 through a connecting via 330; the sheet resistance of the signal transmission layer 320 is less than that of the touch layer 310; among any two touch wires 311, the connecting via 330 corresponding to the touch wire 311 with a longer length in the first direction X is located on the side of the connecting via 330 corresponding to the touch wire 311 with a shorter length in the first direction X close to the display area 100; the first direction X is parallel to the direction in which the display area 100 points to the barrier wall setting area 210.

[0036] Among them, the touch layer 310 includes a plurality of touch wires 311, the signal transmission layer 320 includes a plurality of touch signal transmission wires 321, the touch wire 311 and the touch signal transmission wire 321 are electrically connected through the connecting via 330, which ensures that the touch layer 310 and the signal transmission layer 320 are electrically connected, that is, ensures that the touch signal is normally transmitted. Further, since the touch layer 310 and the signal transmission layer 320 both have resistance, and the sheet resistance of the touch layer 310 and the signal transmission layer 320 is different due to the difference in film layer material and / or the difference in film layer thickness, specifically, the sheet resistance of the signal transmission layer 320 is less than that of the touch layer 310.

[0037] Further, the plurality of touch wires 311 included in the touch layer 310 have different lengths of extension in the display area 100, that is, the lengths of the touch wires 311 connected with the touch electrodes are different, for example, referring to Figure 4 and Figure 5 As shown in the figures, the extension length of the touch wire 311a is less than that of the touch wire 311b, and the loss of the touch signal on the touch wire 311a is less than that on the touch wire 311b. In order to balance the loss of the touch signal transmission in different touch wires 311a and 311b, the touch signal transmitted in the touch wire 311b can be transmitted on the touch signal transmission wire 321 more or earlier. Specifically, the connecting via 330 connected with the touch wire 311b is closer to the display area 100 than the connecting via 330 connected with the touch wire 311a. Because the sheet resistance of the signal transmission layer 320 is small, the touch wire 311b is electrically connected with the touch signal transmission wire 321 through the connecting via 330 earlier than the touch wire 311a, which can reduce the loss of the touch signal at the touch wire 311b, and further ensure the balance of the touch signal loss on the whole, and better realize the touch function of the touch display panel 10.

[0038] For example, referring to Figure 4 As shown in FIG. 10, when the touch electrodes in the touch display panel 10 are mutual capacitive, the loss of the touch signal on the whole can be balanced by adjusting the position of the connection via 330, and the touch function of the touch display panel 10 can be better implemented. Further, referring to Figure 5 As shown in FIG. 11, when the touch electrodes in the touch display panel 10 are self capacitive, the loss of the touch signal on the whole can also be balanced by adjusting the position of the connection via 330, and the touch function of the touch display panel 10 can be better implemented. The embodiments of the present application do not specifically limit the setting mode of the touch electrodes.

[0039] Continuing to refer to Figures 3 to 5 As shown in FIG. 12, among any two touch wires 311, the distance between the connection via 330 corresponding to the touch wire 311 extending in the first direction X and the barrier setting area 210 is the same.

[0040] Further, the plurality of touch wires 311 included in the touch layer 310 extend in the display area 100 by the same length. For example, referring to Figure 4 and Figure 5 As shown in FIG. 13, the extension length of the touch wire 311b is equal to the extension length of the touch wire 311c. Based on the consideration of the loss factor of the touch signal caused by the sheet resistance of the touch layer 310, the loss of the touch signal on the touch wire 311b is equal to the loss of the touch signal on the touch wire 311c. In order to balance the loss of the touch signal transmission in different touch wires 311b, the connection via 330 connected to the touch wire 311b and the connection via 330 connected to the touch wire 311c are arranged at the same position, i.e., the distance between the connection via 330 and the barrier setting area 210 is the same. The touch wires 311 extending by the same length have the same touch signal loss, which further ensures the balance of the touch signal loss on the whole, and better implements the touch function of the touch display panel 10.

[0041] Figure 6 FIG. 14 is a structural schematic diagram of another touch display panel provided by the embodiments of the present application, Figure 7 is a structural schematic diagram along the section line BB' in Figure 2 FIG. 14, referring to Figure 6 and Figure 7As shown, the touch layer 310 includes a first touch layer 310A and a second touch layer 310B. The first touch layer 310A includes at least a first touch trace 311A1, and the second touch layer 310B includes at least a second touch trace 311B1. The sheet resistance of the first touch layer 310A is less than the sheet resistance of the second touch layer 310B. The signal transmission layer 320 includes a touch signal transmission trace 321, and the sheet resistance of the signal transmission layer 320 is less than that of the touch layer 310A. The sheet resistor of 310; the connecting via 330 includes a first connecting via 330A and a second connecting via 330B, the first touch trace 311A1 is electrically connected to the touch signal transmission trace 321 through the first connecting via 330A, and the second touch trace 311BA is electrically connected to the touch signal transmission trace 321 through the second connecting via 330B; the first connecting via 330A is located on the side of the second connecting via 330B near the retaining wall setting area 210.

[0042] Among them, reference Figure 6 and Figure 7 As shown, the first touch layer 310A includes a first touch trace 311A1, and the second touch layer 310B includes a second touch trace 311B1. The first touch layer 310A and the second touch layer 310B are located in different film layers. Specifically, the sheet resistance of the first touch layer 310A is less than the sheet resistance of the second touch layer 310B. That is, the loss of the touch signal in the first touch layer 310A is less than the loss of the touch signal in the second touch layer 310B. Therefore, by reducing the length of the touch signal transmission in the second touch layer 310B, the overall balance of touch signal loss can be ensured, and the touch function of the touch display panel 10 can be better realized.

[0043] Specifically, the connection via 330 includes a first connection via 330A and a second connection via 330B, see reference. Figure 6 As shown, the first touch trace 311A1 is electrically connected to the touch signal transmission trace 321 through the first connection via 330A, and the second touch trace 311B1 is electrically connected to the touch signal transmission trace 321 through the second connection via 330B. By adjusting the positions of the first connection via 330A and the second connection via 330B, the transmission loss of the touch signal in the first touch layer 310A and the second touch layer 310B is adjusted. (Reference) Figure 6 and Figure 7As shown, the first connection via hole 330A is closer to the side of the barrier wall setting area 210 than the second connection via hole 330B, and thus the length of the touch signal transmitted in the second touch layer 310B is smaller than the length of the touch signal transmitted in the first touch layer 310A, that is, the touch signal transmitted in the second touch layer 310 can be transmitted in the signal transmission layer 320 with smaller sheet resistance as early as possible or more, so as to balance the touch signal loss on the whole and better realize the touch function of the touch display panel 10.

[0044] Further, referring to Figure 7 As shown, the first touch layer 310A and the second touch layer 310B further include an insulating layer 340, and the insulating layer 320 can avoid mutual influence of different electrical signals, ensure stable transmission of the touch signal, and improve the touch effect of the touch display panel 10.

[0045] It should be noted that the first touch trace 311A1 and the second touch trace 311B1 are respectively electrically connected with different touch signal transmission traces 321, such as Figure 6 As shown in the cross-sectional view in Figure 7 , the touch signal transmission traces connected with the first touch trace 311A1 and the second touch trace 311B1 are arranged in the direction perpendicular to the paper, and the first connection via hole 330A and the second connection via hole 330B are also arranged in the direction perpendicular to the paper, Figure 7 two connection via holes are only exemplarily shown in the cross-sectional view, and it does not mean that the two connection via holes are electrically connected with the same touch signal transmission trace 321. Figure 8 is another structure schematic view of a touch display panel provided by the embodiment of the present application, referring to Figures 6 to 8 As shown, the first touch layer 310A further includes a touch electrode 3100 and a first connection cross-bridge 3200A, and the second touch layer 310B further includes a second connection cross-bridge 3200B; the touch electrode 3100 includes a first touch electrode 3100A and a second touch electrode 3100B, the first touch electrode 3100A includes a plurality of first electrode blocks 3110A, and two adjacent first electrode blocks 3110A are electrically connected through the first connection cross-bridge 3200A; the second touch electrode 3100B includes a plurality of second electrode blocks 3110B, and two adjacent second electrode blocks 3110B are electrically connected through the second connection cross-bridge 3200B; the first touch trace 311A1 is electrically connected with the first touch electrode 3100A, and the second touch trace 311B1 is electrically connected with the second touch electrode 3100B; or, the first touch layer 310A further includes the first touch electrode 3100A, the second touch layer 310B further includes the second touch electrode 3100B, the first touch trace 311A1 is electrically connected with the first touch electrode 3100A, and the second touch trace 311B1 is electrically connected with the second touch electrode 3100B.

[0046] The touch electrode 3100 includes a first touch electrode 3100A and a second touch electrode 3100B. The first touch electrode 3100A is electrically connected to the touch signal transmission wire 321 through a first touch wire 311A1. The second touch electrode 3100B is electrically connected to the touch signal transmission wire 321 through a second touch wire 311B1. In this way, the touch function of the touch display panel 10 is realized.

[0047] Specifically, as shown in FIG. 10A and FIG. 10B, the first touch layer 310A and the second touch layer 310B are located in different film layers. However, the first touch layer 310A includes the first touch electrode 3100A, the second touch electrode 3100B and the first connection bridge 3200A. That is, the first touch electrode 3100A and the second touch electrode 3100B are located in the same film layer. Figure 6 Figure 7 Further, as shown in FIG. 10A and FIG. 10B, the first touch layer 310A and the second touch layer 310B are located in different film layers. However, the first touch layer 310A includes the first touch electrode 3100A. The second touch layer 310B includes the second touch electrode 3100B. That is, the first touch electrode 3100A and the second touch electrode 3100B are located in different film layers. The specific arrangement of the touch electrode 3100 is not limited in the embodiments of the present application. Figure 6 Further, as shown in FIG. 10A and FIG. 10B, the first touch layer 310A and the second touch layer 310B are located in different film layers. However, the first touch layer 310A includes the first touch electrode 3100A. The second touch layer 310B includes the second touch electrode 3100B. That is, the first touch electrode 3100A and the second touch electrode 3100B are located in different film layers. The specific arrangement of the touch electrode 3100 is not limited in the embodiments of the present application.

[0048] Figure 8 Further, as shown in FIG. 10A and FIG. 10B, the first touch layer 310A and the second touch layer 310B are located in different film layers. However, the first touch layer 310A includes the first touch electrode 3100A. The second touch layer 310B includes the second touch electrode 3100B. That is, the first touch electrode 3100A and the second touch electrode 3100B are located in different film layers. The specific arrangement of the touch electrode 3100 is not limited in the embodiments of the present application.

[0049] Further, the first touch electrode 3100A can be a touch driving electrode, and the second touch electrode 3100B can be a touch sensing electrode. Alternatively, the first touch electrode 3100A can be a touch sensing electrode, and the second touch electrode 3100B can be a touch driving electrode. The embodiments of the present application do not limit this.

[0050] Figure 9 FIG. 11 is a structural schematic diagram of another touch display panel provided by the embodiments of the present application, Figure 10 is​​Figure 9 A magnified structural diagram at point C, for reference. Figure 9 and Figure 10 As shown, the touch layer 310 includes multiple touch traces 311; the signal transmission layer 320 includes multiple touch signal transmission traces 321, and the touch signal transmission traces 321 and touch traces 311 are electrically connected through a connection via 330; among any two touch traces 311, the contact area between the touch trace 311 with the longer extension length along the first direction X and the touch signal transmission trace 321 is greater than the contact area between the touch trace 311 with the shorter extension length along the first direction X and the touch signal transmission trace 321; the first direction X is parallel to the direction from the display area 100 to the barrier setting area 210.

[0051] Among them, reference Figure 9 As shown, the touch layer 310 includes multiple touch traces 311. The different touch traces 311 extend to different lengths along the first direction X. Longer touch traces 311 experience greater touch signal transmission loss compared to shorter ones. Furthermore, the multiple touch traces 311 are electrically connected to touch signal transmission traces 321 via vias 330, thus enabling touch signal transmission and ensuring the touch functionality of the touch display panel 10. The sheet resistance of the signal transmission layer 320 is relatively low, so the contact area between the touch traces 311 and the touch signal transmission traces 321 can be adjusted to ensure balanced touch signal transmission loss.

[0052] For example, refer to Figure 10 As shown, touch trace 311 and touch signal transmission trace 321 are electrically connected at a connecting via 330. The size and area of ​​the connecting via 330 represent the contact area between touch trace 311 and touch signal transmission trace 321. That is, by adjusting the area of ​​the connecting via 330, the contact area between touch trace 311 and touch signal transmission trace 321 is adjusted, ensuring balanced touch signal transmission loss. For example, Figure 9 The circular shape of the connecting via 330 is used as an example in this embodiment of the invention, but the specific shape of the connecting via 330 is not limited. The area of ​​the connecting via 330 that contacts the longer touch trace 311 is larger than the area of ​​the connecting via 330 that contacts the shorter touch trace 311. This ensures that the longer touch trace 311 has a larger contact area with the signal transmission layer 320, while the shorter touch trace 311 has a smaller contact area with the signal transmission layer 320. This ensures balanced touch signal transmission loss and guarantees the touch functionality of the touch display panel 10.

[0053] Figure 11 yes Figure 9 Another enlarged structural diagram at point C, see reference. Figures 9 to 11As shown, the connection via 330 includes a third connection via 331 and a fourth connection via 332; of any two touch traces 311, the touch trace 311 with a longer extension along the first direction X is electrically connected to the touch signal transmission trace 321 through the third connection via 331, and the touch trace 311 with a shorter extension along the first direction X is electrically connected to the touch signal transmission trace 321 through the fourth connection via 332; the opening area of ​​the third connection via 331 is larger than the opening area of ​​the fourth connection via 332; and / or, the third connection via 331 includes a third sub-via 331A, the fourth connection via 332 includes a fourth sub-via 332A, and the number of third sub-vias 331A is greater than the number of fourth sub-vias 332A.

[0054] For details, please refer to Figure 10 and Figure 11 As shown, the connection via 330 includes a third connection via 331 and a fourth connection via 332. Touch traces 311 with different extension lengths are electrically connected to touch signal transmission traces 321 through the third connection via 331 and the fourth connection via 332, respectively. By adjusting the area of ​​the third connection via 331 and the fourth connection via 332, the touch signal transmission loss of touch traces 311 with different extension lengths is balanced, ensuring the overall touch function of the touch display panel 10 is stable.

[0055] Specifically, the areas of the third connecting via 331 and the fourth connecting via 332 can be adjusted by adjusting the opening area of ​​the connecting via 330 and the number of connecting vias 330. For example, as shown... Figure 10 As shown, the opening area of ​​the third connecting via 331 is larger than the opening area of ​​the fourth connecting via 332. For example, as... Figure 11 As shown, the third connecting via 331 includes two third sub-vias 331A, and the fourth connecting via 332 includes one fourth sub-via 332A. Generally speaking, the area of ​​the third connecting via 331 is larger than the area of ​​the fourth connecting via 332. In this embodiment of the invention, the number of third sub-vias 331A and fourth sub-vias 332A is not specifically limited.

[0056] Figure 12 This is a schematic diagram of another touch display panel provided in an embodiment of the present invention. Figure 13 yes Figure 12 A structural schematic diagram along the central section DD', for reference. Figure 12 and Figure 13 As shown, the touch display panel 10 also includes a substrate 410, a metal layer 420, and at least one organic layer 430 disposed on the side of the metal layer 420 away from the substrate 410. An organic void region 220 is disposed in the organic layer 430, and the organic void region 220 penetrates at least one organic layer 430. A connection via 330 is disposed in the organic void region 220.

[0057] Specifically, the touch display panel 10 includes a substrate 410, a metal layer 420 and an organic layer 430. Different film layers are prepared on the basis of the substrate 410, different signal transmission is realized by preparing different metal layers 420, and the touch display panel 10 is planarized and encapsulated by preparing the organic layer 430 and the like, so as to ensure the stability of the touch display panel 10. At the same time, the touch display panel 10 can also include an organic empty area 220. The organic empty area 220 penetrates the organic layer 430, that is, the organic layer 430 is not arranged in the organic empty area 220. The organic empty area 220 can play a role of isolating water vapor, so as to avoid the water vapor on the side of the display area 100 away from the organic empty area 220 from invading the display area 100 along the organic layer 430. In addition, the organic empty area 220 can be arranged on the side of the barrier wall setting area 210 close to the display area 100, or on the side of the barrier wall setting area 210 away from the display area 100. Further, as shown in Figure 12 and Figure 13 The connecting via 330 can be arranged in the organic empty area 220. Since the organic layer is not arranged in the organic empty area 220, the touch layer 310 in the organic empty area 220 will not have the problem of climbing due to the height difference, so as to ensure the stable arrangement mode of the touch layer 310. At the same time, the electric connection between the touch layer 310 and the signal transmission layer 320 is ensured, and the display area 100 is not affected by the invasion of water vapor, so as to ensure the touch and display effects of the touch display panel 10.

[0058] Continuing to refer to Figure 12 and Figure 13 The metal layer 420 includes a first metal layer M1, a second metal layer M2 and a third metal layer M3 arranged in sequence. The touch display panel 10 further includes a pixel circuit 400. The pixel circuit 400 includes a thin film transistor including a gate 421 and a source-drain electrode 422. The gate 421 is located on the first metal layer M1, and the source-drain electrode 422 is located on the second metal layer M2. The signal transmission layer 320 multiplexes the third metal layer M3.

[0059] Specifically, the metal layer 420 included in the touch display panel 10 includes a first metal layer M1, a second metal layer M2 and a third metal layer M3, and different metal layers 420 are arranged in sequence. The touch display panel 10 further includes a pixel circuit 400. The pixel circuit 400 includes a thin film transistor including a gate 421 on the first metal layer M1 and a source-drain electrode 422 on the second metal layer M2. Further, the thin film transistor further includes an active layer 424 and the like, which are not limited in the embodiments of the present application. The signal transmission layer 230 multiplexes the third metal layer M3. The connecting via 330 is prepared above the third metal layer M3 to realize the electric connection with the touch layer 310.

[0060] Further, with reference toFigure 13 As shown, the touch display panel 10 further includes a buffer layer 441, a gate insulating layer 442, an interlayer insulating layer 442, a passivation layer 443, a planarization layer 444, and a pixel definition layer 445. The pixel circuit 400 is electrically connected to the light-emitting element 460 through a connecting metal 450. The light-emitting element 460 further includes an anode 461, a light-emitting layer 462, and a cathode 463. The source and drain electrodes 422 are electrically connected to the anode 461 through the connecting metal 450, solving the problem of deep drilling when connecting the anode 461 and the source and drain electrodes 422, and ensuring the display effect of the touch display panel 10. This embodiment of the invention does not limit the specific film layers of the touch display panel 10. Furthermore, the connecting metal 450 is disposed on the third metal layer M3, in the same layer as the signal transmission layer 320, ensuring a simple film layer structure for the display panel and facilitating a thinner design for the display panel.

[0061] Figure 14 yes Figure 2 Another structural schematic diagram along the central section line AA'. Figure 15 yes Figure 2 Another structural schematic diagram along the central section line AA'. Figure 16 yes Figure 2 Another structural schematic diagram along the central section line AA', see reference. Figure 3 , Figures 14 to 16 As shown, the touch display panel 10 also includes an encapsulation layer 350 and a touch insulating layer 360 located between the touch layer 310 and the signal transmission layer 320; the connection via 330 includes a fifth connection via 333 and a sixth connection via 334 that are interconnected, the fifth connection via 333 penetrating the encapsulation layer 350 and the sixth connection via 334 penetrating the touch insulating layer 360; along the thickness direction h of the touch display panel 10, the fifth connection via 333 and the sixth connection via 334 at least partially overlap.

[0062] Among them, reference Figure 3 and Figure 16 As shown, the touch display panel 10 also includes an encapsulation layer 350, which can be a thin-film encapsulation layer. Specifically, it may include a first inorganic encapsulation layer 350A, an organic encapsulation layer 350B, and a second inorganic encapsulation layer 350C. While isolating moisture, it also offers advantages such as thinness and flexibility, thus providing water and oxygen protection for the touch display panel 10. The barrier area 210 defines the boundary of the encapsulation layer 350, helping it to better block water and oxygen. Furthermore, the touch display panel 10 also includes a touch insulating layer 360, which separates the touch layer 310 from the encapsulation layer 350, ensuring stable transmission of touch signals.

[0063] The connection via 330 includes a fifth connection via 333 and a sixth connection via 334. The fifth connection via 333 and the sixth connection via 334 are connected, and the touch layer 310 is electrically connected to the signal transmission layer 320 through the connection via 330. As shown in Figure 16 The fifth connection via 333 penetrates the encapsulation layer 350, and the sixth connection via 334 penetrates the touch insulation layer 360. By penetrating the two connection vias 330 through different film layers, the edge connection via 330 is prepared, and the electrical connection between the touch layer 310 and the signal transmission layer 320 is ensured to be stable. Figure 16 The fifth connection via 333 and the sixth connection via 334 completely overlap, ensuring the transmission of the touch signal. Further, the fifth connection via 333 and the sixth connection via 334 partially overlap to complete the transmission of the touch signal. The present embodiment does not specifically limit the overlapping degree of the fifth connection via 333 and the sixth connection via 334.

[0064] Specifically, the connection via 330 includes a fifth connection via 333 and a sixth connection via 334. As shown in Figure 14 The encapsulation layer 350 is prepared on the touch display panel 10. The encapsulation layer 350 includes a first inorganic encapsulation layer 350A, an organic encapsulation layer 350B, and a second inorganic encapsulation layer 350C. The organic encapsulation layer 350 of the encapsulation layer 350 extends to the barrier wall setting area 210, avoiding water and oxygen from invading the display area 100. The fifth connection via 333 is prepared on the encapsulation layer 350. The signal transmission layer 320 is exposed through the fifth connection via 333, which facilitates the electrical connection between the touch layer 310 and the signal transmission layer 320. Further, as shown in Figure 15 The touch insulation layer 360 is prepared on the encapsulation layer 350. The touch layer 310 is separated from the encapsulation layer 350 through the touch insulation layer 360, ensuring the stable transmission of the touch signal. The sixth connection via 334 is prepared on the touch insulation layer 360, which ensures the electrical connection between the touch layer 310 and the signal transmission layer 320. Further, the present embodiment can prepare the fifth connection via 333 on the encapsulation layer 350 first. This can ensure better lapping effect between the touch layer 310 and the signal transmission layer 320, avoiding the film layer being too thick and the electrical connection between the touch layer 310 and the signal transmission layer 320 being poor.

[0065] Continuing to refer to Figure 2 and Figure 3 The barrier wall setting area 210 is provided with a first barrier wall structure 211A and a second barrier wall structure 211B. The first barrier wall structure 211A is located on the side of the second barrier wall structure 211B close to the display area 100. The connection via 330 is arranged between the first barrier wall structure 211A and the display area 100.

[0066] Specifically, as shown inFigure 2 and Figure 3 As shown, the barrier setting area 210 includes a first barrier structure 211A and a second barrier structure 211B, which are formed by stacking organic film layers. By setting two barrier structures 211 in the touch display panel 10, moisture can be better prevented from intruding into the display area 100, thus ensuring the touch and display effects of the touch display panel 10.

[0067] Specifically, the connecting via 330 is located between the first barrier structure 211A and the display area 100. Compared to placing the connecting via 330 on the side of the second barrier structure 211B away from the display area 100, the bezel area occupied by the touch display panel 10 can be reduced, achieving a narrow bezel display effect for the touch display panel 10. Simultaneously, compared to placing the connecting via 330 between the first barrier structure 211A and the second barrier structure 211B, it avoids the touch traces climbing over the barrier structure 211 and electrically connecting with the touch signal transmission trace 321. This also avoids residual metal from the metal film layer between the first barrier structure 211A and the second barrier structure 211B. Residual metal trapped between the first barrier structure 211A and the second barrier structure 211B, and adhering to the corners of the first barrier structure 211A and the second barrier structure 211B, can easily cause short circuits and other malfunctions. In general, by preparing the connecting via 330 between the first retaining wall structure 211A and the display area 100, the narrow bezel display effect of the touch display panel 10 can be achieved, while ensuring stable transmission of touch signals, that is, ensuring the touch function of the touch display panel 10.

[0068] Continue to refer to Figure 2 and Figure 3 As shown, along the first direction X, the dimension between the first retaining wall structure 211A and the second retaining wall structure 211B is L1; the opening size of the connecting through hole 330 is L2, where L2>L1.

[0069] For details, please refer to Figure 3 As shown, the opening size of the connecting via 330 is L2. The distance between the first barrier structure 211A and the display area 100 is greater than the opening size L2 of the connecting via 330. The connecting via 330 can be fabricated on the side of the barrier setting area 210 near the display area 100. However, in order to meet the requirements of the narrow bezel touch display panel 10, the size between the first barrier structure 211A and the second barrier structure 211B is L1, and L2 is greater than L1. Therefore, under the premise of meeting the requirements of the narrow bezel touch display panel 10, the connecting via 330 cannot be fabricated between the first barrier structure 211A and the second barrier structure 211B.

[0070] Based on the same inventive concept, embodiments of the present invention also provide a display device. Figure 17is a structural schematic diagram of a touch display device provided by an embodiment of the present application, as shown in the figure, the touch display device 1 comprises the touch display panel 10 described in any of the above embodiments, therefore, the touch display device 1 provided by the embodiment of the present application has the corresponding beneficial effects in the above embodiments, which will not be described here. For example, the touch display device 1 can be a mobile phone, a computer, a smart wearable device (for example, a smart watch) and a vehicle-mounted display device and the like, and the present application is not limited thereto. Figure 17

[0071] It should be noted that the above are only preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.​

Claims

1. A touch display panel, characterized in that, It includes a display area and a border area located on one side of the display area. The border area includes a retaining wall setting area, and the retaining wall setting area is provided with at least one retaining wall structure. The touch display panel further includes a touch layer and a signal transmission layer, the touch layer and the signal transmission layer are electrically connected through a connection via, the connection via being disposed between the barrier area and the display area; The touch display panel further includes an encapsulation layer and a touch insulation layer located between the touch layer and the signal transmission layer; The connection vias include a fifth connection via and a sixth connection via that are interconnected. The fifth connection via penetrates the encapsulation layer, and the sixth connection via penetrates the touch insulating layer. Along the thickness direction of the touch display panel, the fifth connection via and the sixth connection via at least partially overlap.

2. The touch display panel according to claim 1, characterized in that, The sheet resistance of the signal transmission layer is less than that of the touch layer.

3. The touch display panel according to claim 1, characterized in that, The touch layer includes a first touch layer and a second touch layer. The first touch layer includes at least a first touch trace, and the second touch layer includes at least a second touch trace. The sheet resistance of the first touch layer is less than the sheet resistance of the second touch layer. The signal transmission layer includes touch signal transmission traces, and the sheet resistance of the signal transmission layer is smaller than the sheet resistance of the touch layer; The connection via includes a first connection via and a second connection via. The first touch trace is electrically connected to the touch signal transmission trace through the first connection via, and the second touch trace is electrically connected to the touch signal transmission trace through the second connection via. The first connection via is located on the side of the second connection via that is close to the retaining wall installation area.

4. The touch display panel according to claim 3, characterized in that, The first touch layer further includes touch electrodes and a first connection bridge, and the second touch layer further includes a second connection bridge; the touch electrodes include a first touch electrode and a second touch electrode, the first touch electrode includes a plurality of first electrode blocks, and two adjacent first electrode blocks are electrically connected through the first connection bridge; the second touch electrode includes a plurality of second electrode blocks, and two adjacent second electrode blocks are electrically connected through the second connection bridge; the first touch trace is electrically connected to the first touch electrode, and the second touch trace is electrically connected to the second touch electrode; Alternatively, the first touch layer may further include a first touch electrode, and the second touch layer may further include a second touch electrode, with the first touch trace electrically connected to the first touch electrode and the second touch trace electrically connected to the second touch electrode.

5. The touch display panel according to claim 1, characterized in that, The touch layer includes multiple touch traces; The signal transmission layer includes multiple touch signal transmission lines, and the touch signal transmission lines are electrically connected to each other through the connection vias; Of any two touch traces, the contact area between the touch trace extending longer along the first direction and the touch signal transmission trace is greater than the contact area between the touch trace extending shorter along the first direction and the touch signal transmission trace; the first direction is parallel to the direction from the display area to the barrier wall setting area.

6. The touch display panel according to claim 5, characterized in that, The connection vias include a third connection via and a fourth connection via; Of any two touch traces, the touch trace with a longer extension along the first direction is electrically connected to the touch signal transmission trace through the third connection via, and the touch trace with a shorter extension along the first direction is electrically connected to the touch signal transmission trace through the fourth connection via. The opening area of ​​the third connecting via is greater than the opening area of ​​the fourth connecting via; and / or, the third connecting via includes a third sub-via, the fourth connecting via includes a fourth sub-via, and the number of the third sub-vias is greater than the number of the fourth sub-vias.

7. The touch display panel according to claim 1, characterized in that, The touch display panel further includes a substrate, a metal layer, and at least one organic layer disposed on the side of the metal layer away from the substrate. An organic void region is disposed in the organic layer, and the organic void region penetrates at least one organic layer. The connection via is located in the organic no-space zone.

8. The touch display panel according to claim 7, characterized in that, The metal layer includes a first metal layer, a second metal layer, and a third metal layer disposed sequentially. The touch display panel further includes a pixel circuit, which includes a thin-film transistor. The thin-film transistor includes a gate and a source / drain stage. The gate is located in the first metal layer, and the source / drain stage is located in the second metal layer. The signal transmission layer multiplexes the third metal layer.

9. The touch display panel according to claim 1, characterized in that, The barrier wall setting area is provided with a first barrier wall structure and a second barrier wall structure, with the first barrier wall structure located on the side of the second barrier wall structure closer to the display area; The connection via is located between the first retaining wall structure and the display area.

10. The touch display panel according to claim 9, characterized in that, Along the first direction, the dimension between the first retaining wall structure and the second retaining wall structure is L1; The opening size of the connecting via is L2, where L2 > L1.

11. A touch display panel, characterized in that, It includes a display area and a border area located on one side of the display area. The border area includes a retaining wall setting area, and the retaining wall setting area is provided with at least one retaining wall structure. The touch display panel further includes a touch layer and a signal transmission layer, the touch layer and the signal transmission layer are electrically connected through a connection via, the connection via being disposed between the barrier area and the display area; The touch layer includes multiple touch traces; The signal transmission layer includes multiple touch signal transmission lines, and the touch signal transmission lines are electrically connected to each other through the connection vias; Of any two touch traces, the connecting via corresponding to the touch trace with the longer extension along the first direction is located on the side of the connecting via corresponding to the touch trace with the shorter extension along the first direction that is closer to the display area; the first direction is parallel to the direction from the display area to the barrier wall setting area.

12. The touch display panel according to claim 11, characterized in that, In any two touch traces, the distance between the connecting vias corresponding to the touch traces that extend the same length along the first direction and the retaining wall setting area is the same.

13. A touch display device, characterized in that, Includes the touch display panel as described in any one of claims 1-12.

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