Display panels and display devices

Abstract

This application discloses a display panel and a display device, wherein at least one of the interlayer insulating portion and the separation portion includes a recess provided in the gap region, thereby releasing the film layer stress of at least one of the interlayer insulating portion and the separation portion, reducing the interfacial stress between the interlayer insulating portion and the separation portion, and thereby avoiding delamination between the interlayer insulating portion and the separation portion. Furthermore, even if delamination occurs between the interlayer insulating portion and the separation portion, it is possible to prevent further expansion of the delaminated area.

Description

Technical Field

[0005] ,

[0001] This application claims the priority of a Chinese patent application with the application number 202410750197.4 filed on June 11, 2024, and all of its contents are incorporated herein by reference.

[0002] This application relates to the field of display technology, and particularly to display panels and display devices.

Background Art

[0003] A display device generally consists of a display panel and a driving chip. Binding terminals are provided on the display panel, and by binding the driving chip to the binding terminals, the signal communication between the display panel and the driving chip is realized, and the normal operation of the display device is realized. In a conventional display device, after binding the display panel and the driving chip, a reliability test is performed on the display device. The reliability test generally places the display device in an environment with a temperature of 85°C and a humidity of 85%, and observes and detects whether there are defects in the display device. In the test process of the conventional display device, it was found that in the binding area of the display panel, peeling occurred between the interlayer insulating layer and the insulating layer in the touch layer, so that when the display device was lit, an abnormality occurred on the display screen.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Therefore, there was a technical problem in the conventional display device that display abnormalities of the display device occurred due to peeling between the interlayer insulating layer and the insulating layer in the touch layer.

Means for Solving the Problems

[0005] <​​

[0006] To solve the above technical problems, the present invention is as follows.

[0007] Embodiments of the present invention provide a display panel, said display panel, The display area includes a display area and a binding area located on at least one side of the display area, the binding area includes a terminal area and a gap area located between adjacent terminal areas, and binding terminals are provided within the terminal area. The aforementioned display panel is Substrate and, An interlayer insulating layer provided on one side of the substrate, the interlayer insulating layer including an interlayer insulating portion provided in the binding region, A source-drain layer provided on the side of the interlayer insulating layer away from the substrate, wherein the source-drain layer includes a source-drain portion provided in the binding region, A touch layer provided on the side of the source / drain layer away from the interlayer insulating layer, wherein the touch layer includes a separation layer, and the separation layer includes a separation portion provided in the binding region, Within the binding region, the source / drain portion is provided between the interlayer insulating portion and the separation portion, the separation portion is in contact with the source / drain portion and the interlayer insulating portion, and at least one of the interlayer insulating portion and the separation portion includes a recess provided in the gap region.

[0008] Furthermore, the present embodiment provides a display device which includes any one of the above embodiments' display panels and a drive chip, the drive chip being connected to a binding terminal in the display panel. [Brief explanation of the drawing]

[0009] The specific embodiments of this application will be described in detail below, in conjunction with the attached drawings, and the invention and other beneficial effects of this application will become clear.

[0010] [Figure 1] A schematic diagram of the structure of a current display device according to the present invention. [Figure 2] This is a first schematic diagram of a display panel according to an embodiment of the present invention. [Figure 3] This is a first schematic diagram of the binding area of ​​the display panel according to the present invention. [Figure 4] This is a second schematic diagram of a display panel according to an embodiment of the present invention. [Figure 5] This is a first cross-sectional view AA of the display panel in Figure 3. [Figure 6] This is a third schematic diagram of a display panel according to the present invention. [Figure 7] This is a second cross-sectional view AA of the display panel in Figure 3. [Figure 8] This is a third cross-sectional view AA of the display panel in Figure 3. [Figure 9] This is a cross-sectional view of the fourth AA of the display panel in Figure 3. [Figure 10] This is a fourth schematic diagram of a display panel according to the present invention. [Figure 11] Figure 3 is a cross-sectional view of the display panel at the base board (BB). [Figure 12] This is a fifth cross-sectional view AA of the display panel in Figure 3. [Figure 13] This is a second schematic diagram of the binding area of ​​the display panel according to the present invention. [Figure 14] This is a third schematic diagram of the binding area of ​​the display panel according to the present invention. [Figure 15] This figure shows the interfacial stress cloud between the first touch insulating layer and the interlayer insulating layer within the binding region of the display device in Figure 1. [Figure 16] Figure 5 shows the interfacial stress cloud between the first touch insulating layer and the interlayer insulating layer within the binding region of the display panel. [Figure 17] This is a schematic diagram of a display device according to an embodiment of the present invention.

Best Mode for Carrying Out the Invention

[0011] Hereinafter, the invention according to the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments that can be obtained by those skilled in the art without creative labor belong to the protection scope of the present application.

[0012] In the specification of the present application, terms such as "center", "vertical", "horizontal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. Such devices or elements do not have a specific orientation or are not configured and operated in a specific orientation. It is only for the purpose of facilitating and simplifying the description of the present application and is not to be understood as a limitation to the present application. Also, the terms "first" and "second" are used only for the purpose of explanation and do not indicate or imply relative importance or implicitly indicate the number of the indicated technical features. Therefore, the features defined by "first" and "second" may potentially include one or more features, explicitly or implicitly. In the specification of the present application, "plurality" means two or more unless explicitly and specifically limited.

[0013] In the specification of the present application, unless specifically limited, the terms "attached", "connected", and "joined" should be understood in a broad sense. For example, it may be a fixed connection, a removable connection, or an integral connection, a mechanical connection, an electrical connection, or a connection capable of communicating with each other, a direct connection, an indirect connection through an intermediate medium, or a communication between two elements or an interaction between two elements. Those skilled in the art can understand the specific meanings of the above terms in the specification of the present application according to specific situations.

[0014] In this application, unless there are specific and clear regulations and limitations, for the first feature to be "above" or "below" the second feature can include direct contact between the first feature and the second feature, and the first feature and the second feature can include contact by another feature therebetween rather than direct contact. Further, for the first feature to be "above", "upward", and "upper surface" of the second feature only indicates that the first feature is directly above or obliquely above the second feature, or the first feature is higher horizontally than the second feature. For the first feature to be "below", "downward", and "lower surface" of the second feature only indicates that the first feature is directly below or obliquely below the second feature, or the first feature is lower horizontally than the second feature.

[0015] The following disclosure provides many different embodiments or examples for realizing different structures of this application. For the sake of simplifying the disclosure of this application, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit this application. In addition, this application may repeat reference numerals and / or reference characters in various examples, but such repetition is for the purpose of simplification and clarification and does not itself indicate the relationship between the various embodiments and / or settings being discussed. Furthermore, various examples of specific processes and materials are provided in this application, but those skilled in the art can apply other processes and / or use other materials.

[0016] Conventional display devices may have binding terminals in the binding area to enable connection to the drive chip. These binding terminals are formed by connecting the metals of each film layer, and an insulating layer is provided between each binding terminal to prevent signal crosstalk. As shown in Figure 1, the display device includes, in order, a substrate 111, a barrier film (not shown), a buffer film (not shown), a first gate film 112, a first gate insulating film 113, a first interlayer dielectric film 114, a first source / drain film 115, a second interlayer dielectric film 116, a second source / drain film 117, a first touch insulating film 118, a first touch metal film (not shown), a second touch insulating film 119, and a second touch metal film 120. The metals of the first gate film 112, the first source / drain film 115, the second source / drain film 117, and the second touch metal film 120 are connected to form binding terminals 13, and each insulating layer is stacked between adjacent binding terminals 13, thereby preventing short circuits between adjacent binding terminals.

[0017] Testing of the display device revealed that delamination occurred between the interlayer insulating layer and the insulating layer in the touch layer in the binding region of the display panel. Mechanical analysis of the display device showed that this is due to the presence of a metal film (second source / drain film 117 in Figure 1) between the second interlayer dielectric film 116 and the first touch insulating film 118. In high-temperature environments, the thermal expansion coefficient of the metal is about an order of magnitude higher than that of the inorganic layer, which generates large thermal stress at the base of the metal film. This causes a structural change, leading to a concentration of large stresses. If the thermal stress exceeds the strength of the material or the interfacial strength, the structure breaks, delamination occurs between the second interlayer dielectric film and the first touch insulating film, and abnormalities occur on the display screen when the display device is lit. Therefore, conventional display devices had a technical problem in that display abnormalities occurred due to delamination between the interlayer insulating layer and the insulating layer in the touch layer.

[0018] The embodiments of this application provide a display panel and a display device for solving the above-mentioned technical problems.

[0019] As shown in Figures 2 to 7, the embodiment of the present invention provides a display panel, the display panel 2 including a display area 21 and a binding area 221 located on at least one side of the display area 21, the binding area 221 including a terminal area 321 and a gap area located between adjacent terminal areas 321, the terminal area 321 is provided with a binding terminal 31, the display panel 2 including a substrate 411, an interlayer insulating layer 41, a source / drain layer 42 and a touch layer 43, the interlayer insulating layer 41 is located on one side of the substrate 411 The interlayer insulating layer 41 includes an interlayer insulating portion 422a provided in the binding region 221, the source / drain layer 42 is provided on the side of the interlayer insulating layer 41 away from the substrate, the source / drain layer 42 includes a source / drain portion 423a provided in the binding region, the touch layer 43 is provided on the side of the source / drain layer 42 away from the interlayer insulating layer 41, the touch layer 43 includes a separation layer 44, and the separation layer 44 includes a separation portion 44a provided in the binding region 221.

[0020] Here, in the binding region 221, the source / drain portion 423a is provided between the interlayer insulating portion 422a and the separation portion 44a, the separation portion 44a is in contact with the source / drain portion 423a and the interlayer insulating portion 422a, and at least one of the interlayer insulating portion 422a and the separation portion 44a includes a recess 50 provided in the gap region 322.

[0021] The present embodiment provides a display panel in which at least one of the interlayer insulating portion and the separation portion includes a recess provided in the gap region. The recess releases the film layer stress of at least one of the interlayer insulating portion and the separation portion, thereby reducing the interfacial stress between the interlayer insulating portion and the separation portion. This prevents delamination between the interlayer insulating portion and the separation portion. Furthermore, even if delamination occurs between the interlayer insulating portion and the separation portion, the recess prevents further spread of the delaminated area, ultimately improving the yield of the display panel.

[0022] Specifically, as shown in Figure 2, the display panel 2 includes a display area 21 and a non-display area 22, and the non-display area 22 includes a binding area 221. In this embodiment, the non-display area is described as being provided around the display area 21 as an example, but the embodiment is not limited thereto, and the non-display area does not have to be provided around the display area, or the non-display area may be provided on the back of the display panel. Furthermore, the design of the binding area is not limited thereto, and the binding area may be folded and provided on the back of the display panel, and it is not limited to providing the binding area on the underside of the display area.

[0023] Specifically, as shown in Figure 3, the binding terminal 31 may include an input terminal 311 and an output terminal 312, the input terminal 311 may be connected to the wiring of the display area (e.g., data lines or scan lines), the output terminal 312 may be connected to a drive chip, the input terminal 311 and the output terminal 312 may be connected via a connecting line 33, and one row of input terminals 311 and one row of output terminals 312 may be connected to each other via the connecting line 33. However, the embodiments of the present invention are not limited thereto, and other designs for connection to a drive chip via a binding terminal may be adopted from the design of the present invention.

[0024] Specifically, although Figure 3 shows only one row of input terminals 311 and multiple rows of output terminals 312, the embodiments of this invention are not limited to this, and the number of rows and columns of input terminals 311 and output terminals 312 can be set as needed.

[0025] Specifically, while the interlayer insulating layer is formed using a high-temperature process, the separation layer is formed using a low-temperature process to prevent the high-temperature process from affecting the performance of the light-emitting material. Due to these differences in processes, even if the materials are the same, there is a certain difference in the performance of the interlayer insulating layer and the separation layer. As a result, the strength of the interface between the two becomes lower, making it more susceptible to delamination when subjected to stress. In the embodiment of the present invention, by providing a recess in at least one of the interlayer insulating portion and the separation portion, stress can be released, delamination between the interlayer insulating portion and the separation portion can be avoided, and even if delamination occurs between the interlayer insulating portion and the separation portion, the recess can prevent further spread of the delaminated area, thereby improving the yield of the display panel.

[0026] Specifically, current display devices have two main methods for improving the film layer delamination problem. One is to use plasma surface treatment technology to improve the interfacial strength between the interlayer insulating layer and the separation layer. However, experiments have shown that this method has limited effectiveness in improving interfacial strength, and the additional steps involved reduce manufacturing efficiency and increase production costs. Another method involves changing the material of the film layer. However, different film layers have different interfacial strengths, and changing the strength of a film layer requires simultaneous verification of mechanical, optical, and electrical properties. Verification of each item involves many factors; for example, mechanical properties include elastic modulus, film formation stress, film layer strength, and interfacial strength. As a result, this process is time-consuming and may not satisfy the needs of other aspects. Embodiments of the present invention address the problem of delamination occurring between the interlayer insulating and separation layers by providing a recess in at least one of the interlayer insulating and separation layers, considering that in high-temperature processes, the structural stress field exhibits mainly local characteristics, and local structural morphology greatly influences the local stress state. This is achieved by releasing stress.

[0027] In some embodiments, one of the interlayer insulating portion and the separation portion includes a recess provided in the gap region, which releases stress and prevents the delamination region from spreading, thereby improving the yield of the display panel.

[0028] In some embodiments, as shown in Figures 4 to 7, the separation layer 44 includes a first touch insulating layer 431 and a second touch insulating layer 433, the first touch insulating layer 431 being provided between the source / drain layer 42 and the second touch insulating layer 433, and the separation portion 44a includes a first touch insulating portion 431a provided on the first touch insulating layer 431 and a second touch insulating portion 433a provided on the second touch insulating layer 433, and includes a recess 50 provided in the gap region 322, where at least one of the interlayer insulating portion 422a, the first touch insulating portion 431a, and the second touch insulating portion 433a is provided. In this way, by including a recess in the gap region in at least one of the interlayer insulating portion, the first touch insulating portion, and the second touch insulating portion, the recess releases the film layer stress in at least one of the interlayer insulating portion, the first touch insulating portion, and the second touch insulating portion, thereby preventing delamination between the interlayer insulating portion and the first touch insulating portion. Furthermore, even if delamination occurs between the interlayer insulating portion and the first touch insulating portion, the recess prevents further expansion of the delaminated area, ultimately improving the yield of the display panel.

[0029] In some embodiments, one of the interlayer insulating portion, the first touch insulating portion, and the second touch insulating portion may include a recess provided in the gap region, which relieves stress and prevents the delamination region from spreading, thereby improving the yield of the display panel.

[0030] Specifically, the interlayer insulation portion can include a recess provided in the gap region. Considering that stress mainly appears in the interlayer insulation portion and the first touch insulation portion, providing a recess in the interlayer insulation portion allows the stress to be released by the interlayer insulation portion. Furthermore, if delamination occurs between the interlayer insulation portion and the first touch insulation portion, the recess can prevent further spread of the delaminate area, thereby improving the yield of the display panel.

[0031] Specifically, the first touch insulating portion can include a recess provided in the gap region. Considering that stress mainly appears in the interlayer insulating portion and the first touch insulating portion, by providing a recess in the first touch insulating portion, the stress can be released by the first touch insulating portion. Furthermore, if delamination occurs between the interlayer insulating portion and the first touch insulating portion, the recess can prevent further spread of the delaminate area, thereby improving the yield of the display panel.

[0032] Specifically, the second touch insulating portion can include a recess provided in the gap area. By providing a recess in the second touch insulating portion, stress can be released by the second touch insulating portion, and if delamination occurs between the interlayer insulating portion and the first touch insulating portion, the recess can prevent further spread of the delaminate area, thereby improving the yield of the display panel.

[0033] Specifically, when a recess is provided in one of the interlayer insulating portion, the first touch insulating portion, and the second touch insulating portion, other film layers located on each film layer can cover the recess. For example, if the first touch insulating portion is provided on the interlayer insulating portion, the first touch insulating portion may fill the recess when a recess is provided in the interlayer insulating portion. When a recess is formed in the second touch insulating portion, if another insulating film layer is provided on its upper surface, the recess of the second touch insulating portion may be filled. If no other insulating film layer is provided on the second touch insulating portion, the recess of the second touch insulating portion does not need to be filled.

[0034] In some embodiments, as shown in Figures 4 and 5, the interlayer insulating layer 41 includes a first recess 51 provided in the gap region 322. By including the first recess in the gap region of the interlayer insulating layer in this way, the interlayer insulating portion can release stress, and even if delamination occurs between the interlayer insulating portion and the first touch insulating portion, the recess can prevent further expansion of the delaminate area, thereby improving the yield of the display panel.

[0035] In some embodiments, as shown in Figures 4 and 5, the first touch insulating portion 431a includes a second recess 52 provided in the gap region 322, with a gap between the edge of the first recess 51 and the edge of the source / drain portion 423a, and a gap between the edge of the second recess 52 and the edge of the source / drain portion 423a. By including the second recess provided in the gap region in the first touch insulating layer in this way, both the interlayer insulating portion and the first touch insulating portion can be released from stress. Furthermore, even if delamination occurs between the interlayer insulating portion and the first touch insulating portion, the recess can prevent further expansion of the delaminate area, thereby improving the yield of the display panel. In addition, by providing a gap between the edge of the first recess and the edge of the source / drain portion, and a gap between the edge of the second recess and the edge of the source / drain portion, it is possible to prevent water and oxygen from entering the metal layer and changing the characteristics of the metal layer, such as impedance, thereby further improving the yield of the display panel.

[0036] Specifically, it should be understood that the recess 50 includes the first recess 51 and the second recess 52.

[0037] In some embodiments, as shown in Figure 5, the first touch insulating portion 431a is provided within the first recess 51, and the orthographic projection of the second recess 52 onto the substrate 411 is within the range of the orthographic projection of the first recess 51 onto the substrate 411. In this way, the first touch insulating portion is provided within the first recess, and the orthographic projection of the second recess onto the substrate is within the range of the orthographic projection of the first recess onto the substrate. As a result, the width of the second recess is smaller than the width of the first recess, and the first touch insulating portion can fill a portion of the first recess. This allows the first touch insulating portion and the interlayer insulating portion to block water and oxygen from entering through the second and first recesses, extending the path of water and oxygen intrusion, preventing display panel failure due to water and oxygen intrusion, and improving the yield of display panels.

[0038] In some embodiments, as shown in Figure 5, the second touch insulating portion 433a does not have a recess in the gap region 322, and the second touch insulating portion 433a fills the second recess 52. In this way, the second touch insulating portion does not have a recess in the gap region, and the second touch insulating portion fills the second recess 52, which prevents water and oxygen from directly entering from within the second recess. Even if water and oxygen enter from the corresponding area of ​​the second recess, the second touch insulating portion fills within the second recess, thus extending the entry path for water and oxygen, preventing deterioration of the display panel's performance due to water and oxygen intrusion, and improving the yield of the display panel.

[0039] Specifically, the first recess can penetrate the interlayer insulation portion, and the second recess can penetrate the first touch insulation portion. As a result, when the second touch insulation portion fills the second recess, the second touch insulation portion actually fills the first touch insulation portion, thus providing the effect of extending the entry path for water and oxygen, regardless of where they enter from.

[0040] In some embodiments, as shown in Figure 5, the distance L1 between the edge of the first recess 51 and the edge of the source / drain portion 423a is 1 to 3 times the thickness H1 of the source / drain portion 423a. By setting the distance between the edge of the first recess and the edge of the source / drain portion to 1 to 3 times the thickness of the source / drain portion, a certain distance is maintained between the edge of the first recess and the edge of the source / drain portion. As a result, even if water or oxygen intrusion occurs, the paths through which water or oxygen can enter are increased, improving the yield of the display panel.

[0041] Specifically, if the source-drain portion between the interlayer insulating portion and the first touch insulating portion includes only the portion of one source-drain layer, the distance between the first recess and the source-drain portion can be 1 to 1.5 times the length of the source-drain portion, or the distance between the first recess and the source-drain portion can be 1 to 3 times the length of the source-drain portion. If the source-drain portion in the interlayer insulating portion and the first touch insulating portion includes the portions of two source-drain layers, the distance between the first recess and the source-drain portion can be 1 to 1.5 times the length of the source-drain portion.

[0042] In some embodiments, as shown in Figure 5, the spacing L2 between the edge of the second recess 52 and the edge of the first recess 51 is 1 to 3 times the thickness H2 of the first touch insulating portion 431a. By setting the spacing between the edge of the second recess and the edge of the first recess to 1 to 3 times the thickness of the first touch insulating portion, a certain distance exists between the edge of the first recess and the edge of the second recess. This increases the entry paths for water and oxygen, even if they penetrate, thereby improving the yield of the display panel.

[0043] Specifically, in the embodiments described above, the interlayer insulating portion includes a first recess provided in the gap region, and the first touch insulating portion includes a second recess provided in the gap region. However, the embodiments of the present application are not limited thereto. The interlayer insulating portion may include a first recess provided in the gap region, and the second touch insulating portion may include a third recess provided in the gap region. Alternatively, the first touch insulating portion may not have a recess, and the first touch insulating portion may fill the first recess. Furthermore, the interlayer insulating portion may not have a recess, and the first touch insulating portion may include a second recess provided in the gap region, and the second touch insulating layer may include a third recess provided in the gap region.

[0044] In some embodiments, as shown in Figure 7, the second touch insulating portion 433a provides a third recess 53 in the gap region 322, the second touch insulating portion 433a is provided within the second recess 52, and the orthographic projection of the third recess 53 onto the substrate 411 is within the range of the orthographic projection of the second recess 52 onto the substrate 411. By providing the third recess in the gap region of the second touch insulating layer in this way, the stress in the second touch insulating portion is further relieved by the third recess, and even if delamination occurs between the interlayer insulating portion and the first touch insulating portion, the first recess, second recess and third recess prevent further spread of the delaminate area, thereby improving the yield of the display panel. Furthermore, by providing the second touch insulating portion within the second recess and positioning the orthographic projection of the third recess onto the substrate within the range of the orthographic projection of the second recess onto the substrate, it is possible to prevent changes in characteristics such as the impedance of the metal layer due to the intrusion of water or oxygen into the metal layer, thereby further improving the yield of the display panel.

[0045] Specifically, as shown in Figure 7, the recess 50 includes a first recess 51, a second recess 52, and a third recess 53.

[0046] In some embodiments, as shown in Figure 8, the first touch insulating portion 431a includes a recess 50 provided in the gap region 322, while the interlayer insulating portion 422a does not have a recess in the gap region 322. By including a recess in the gap region in the first touch insulating portion and not having a recess in the gap region in the interlayer insulating portion, stress can be released by the recess in the first touch insulating portion. Furthermore, even if delamination occurs between the interlayer insulating portion and the first touch insulating portion, the recess can prevent further spread of the delaminate area, thereby improving the yield of the display panel.

[0047] Specifically, if a recess is provided in the first touch insulating portion, a recess may or may not be provided in the second touch insulating portion.

[0048] In some embodiments, as shown in Figure 9, the second touch insulating portion 433a includes a recess 50 provided in the gap region 322, the interlayer insulating portion 422a does not have a recess in the gap region 322, and the first touch insulating portion 431a does not have a recess in the gap region 322. By including a recess in the second touch insulating portion in the gap region, and by not having a recess in the interlayer insulating portion and the first touch insulating portion in the gap region, stress can be released by the recess in the second touch insulating portion, and even if delamination occurs between the interlayer insulating portion and the first touch insulating portion, the recess can further prevent the delamination from spreading further, thereby improving the yield of the display panel.

[0049] In some embodiments, as shown in Figures 10 to 12, the separation layer 44 includes a single layer of touch insulating layer, and the touch insulating layer includes a recess 50 provided in the gap region 322. By having the separation layer include only a single layer of touch insulating layer and the recess provided in the touch insulating layer, stress is released by the recess in the touch insulating portion, and if delamination occurs between the interlayer insulating portion and the separation portion, the recess prevents further spread of the delaminate area, thereby improving the yield of the display panel.

[0050] Specifically, as shown in Figure 11, Figure 11 shows that the separation portion 44a has a recess in the second gap region 322b, and Figure 12 shows that the separation portion 44a has a recess in the first gap region 322a. As can be understood, the separation portion 44a may have a recess in only one of the first gap region 322a and the second gap region 322b, or it may have a recess in both the first gap region 322a and the second gap region 322b.

[0051] In some embodiments, as shown in Figure 5, the interlayer insulating layer 41 includes a first interlayer insulating layer 419 and a second interlayer insulating layer 422, the source / drain layer 42 includes a first source / drain layer 421 and a second source / drain layer 423, the first interlayer insulating layer 419 is provided between the first source / drain layer 421 and the substrate 411, the second interlayer insulating layer 422 is provided between the first source / drain layer 421 and the second source / drain layer 423, and the interlayer insulating portion 422a is provided on the second interlayer insulating layer 422. If the interlayer insulating layer includes a first interlayer insulating layer and a second interlayer insulating layer, and the source / drain layer includes a first source / drain layer and a second source / drain layer, the second interlayer insulating layer contacts the first touch insulating layer. Therefore, the second interlayer insulating layer includes an interlayer insulating portion, and by providing a recess in at least one of the interlayer insulating portion, the first touch insulating layer, and the second touch insulating layer, delamination between the interlayer insulating portion and the first touch insulating portion can be prevented. Even if delamination between the interlayer insulating portion and the first touch insulating portion occurs, the spread of the delaminate area can be blocked, improving the yield of the display panel.

[0052] Specifically, the second source-drain layer 423 may include the source-drain section 423a.

[0053] Specifically, in the embodiments described above, the interlayer insulating layer includes a first interlayer insulating layer and a second interlayer insulating layer, and the source / drain layer includes a first source / drain layer and a second source / drain layer. However, the embodiments of this application are not limited thereto, and the interlayer insulating layer may include only one layer, and the source / drain layer may include only one layer. Here, the interlayer insulating layer includes an interlayer insulating portion, and the source / drain layer includes a source / drain portion.

[0054] Specifically, in the embodiments described above, if the interlayer insulating layer includes a first interlayer insulating layer and a second interlayer insulating layer, and the source / drain layer includes a first source / drain layer and a second source / drain layer, the second interlayer insulating layer includes an interlayer insulating portion. This is because, in the manufacturing process, to facilitate connection to the drive chip, the source / drain layer closest to the touch layer is made into a film layer forming the binding terminal, and the second interlayer insulating layer closest to the touch layer is in contact with the first touch insulating layer. However, as can be understood, the binding terminal may not include a portion of the second source / drain layer, but may include a portion of the first source / drain layer. In this case, since a portion of the second interlayer insulating layer is not provided in the binding region, and only a portion of the first interlayer insulating layer is provided, the first interlayer insulating layer includes an interlayer insulating portion. In other words, when the interlayer insulating layer and source / drain layer include multiple layers, the film layer on which the interlayer insulating portion and source / drain portion are provided can be determined by the film layer used by the binding terminal, and it is not limited to the interlayer insulating layer and source / drain layer closest to the touch layer each containing the interlayer insulating portion and source / drain portion.

[0055] In some embodiments, as shown in Figures 6 and 7, the source-drain layer 42 further includes a third source-drain layer 442, the third source-drain layer 442 is provided on the side of the second source-drain layer 423 away from the second interlayer insulating layer 422, and the source-drain portion 423a is provided on at least one of the second source-drain layer 423 and the third source-drain layer 442. If the source-drain layer includes a third source-drain, and at least one of the second and third source-drain layers is used to form part of the binding terminal, then at least one of the corresponding second and third source-drain layers includes a source-drain portion, and at least one of the interlayer insulating portion, first touch insulating portion, and second touch insulating portion includes a recess provided in the gap region, thereby preventing delamination between the interlayer insulating portion and the first touch insulating portion, and further, even if delamination occurs between the interlayer insulating portion and the first touch insulating portion, the spread of the delaminate area can be blocked, thereby improving the yield of the display panel.

[0056] In some embodiments, as shown in Figure 7, the source-drain portion includes a first portion 511 provided in the second source-drain layer 423, and the source-drain portion includes a second portion 512 provided in the third source-drain layer 442, wherein the first portion 511 and the second portion 512 of the source-drain portion are connected, the first portion 511 of the source-drain portion is provided between the second portion 512 of the source-drain portion and the interlayer insulating portion 422a, the first portion 511 of the source-drain portion is in contact with the interlayer insulating portion 422a, and the second portion 512 of the source-drain portion is in contact with the first touch insulating portion 431a. By having a second source-drain layer that includes a first portion of the source-drain section and a third source-drain layer that includes a second portion of the source-drain section, the binding terminal is formed by multiple source-drain layers, thereby reducing the impedance of the binding terminal. Furthermore, by having at least one of the interlayer insulating section, the first touch insulating section, and the second touch insulating section include a recess provided in the gap region, delamination between the interlayer insulating section and the first touch insulating section can be prevented. Even if delamination between the interlayer insulating section and the first touch insulating section occurs, the spread of the delaminate area can be contained, improving the yield of the display panel.

[0057] In some embodiments, as shown in Figures 10 to 12, the source-drain layer 42 includes a first source-drain layer 421, a second source-drain layer 423, and a third source-drain layer 442, and the source-drain portion 423a is provided in at least one of the first source-drain layer 421, the second source-drain layer 423, and the third source-drain layer 442. By providing the source-drain portion in at least one of the first source-drain layer, the second source-drain layer, and the third source-drain layer in this way, the source-drain portion can be provided according to the needs.

[0058] Specifically, to reduce the thickness of the binding terminals and prevent them from protruding too much, the source / drain portion can be provided in one of the first, second, and third source / drain layers. To reduce the impedance of the binding terminals, it can be provided in two or three of the first, second, and third source / drain layers.

[0059] In some embodiments, as shown in Figures 10 and 11, the source-drain portion 423a includes a third portion 513 provided on the first source-drain layer 421, a fourth portion 514 provided on the second source-drain layer 423, and a fifth portion 515 provided on the third source-drain layer 442, wherein the fourth portion 514 is connected to the third portion 513 and the fifth portion 515, the third portion 513 is in contact with the interlayer insulation portion 422a, and the fifth portion 515 is in contact with the separation portion 44a. By including a third portion provided on the first source-drain layer, a fourth portion provided on the second source-drain layer, and a fifth portion provided on the third source-drain layer in this way, the impedance of the binding terminal is reduced and the electrical characteristics of the binding terminal are improved.

[0060] In some embodiments, as shown in Figures 3, 13, and 14, the gap region 322 includes a first gap region 322a provided along a first direction X and a second gap region 322b provided along a second direction Y, the recess 50 is provided in at least one of the first gap region 322a and the second gap region 322b, and the angle between the first direction X and the second direction Y is greater than 0 and 90 degrees or less. By providing the recess in at least one of the first gap region and the second gap region, the recess releases stress in at least one direction, and if delamination occurs between the interlayer insulation portion and the separation portion, the recess prevents further spreading of the delaminated area, thereby improving the yield of the display panel.

[0061] Specifically, Figure 3 shows that recesses are provided only in a part of the first gap region 322a and a part of the second gap region 322b, Figure 13 shows that array-shaped recesses are provided in the first gap region 322a, and Figure 14 shows that array-shaped recesses are provided in the second gap region 322b. As can be understood, the embodiments of the present application are not limited to the region in which the recesses are provided, and the recesses may be provided in one region of the gap region or in multiple regions of the gap region. Also, although the recesses are provided separately in Figures 13 and 14, the embodiments of the present application are not limited thereto, and recesses in the same row or column may be connected, and recesses provided in the first gap region may be connected to recesses provided in the second gap region.

[0062] Specifically, as shown in Figures 5 and 7, the binding terminal 31 includes a portion located in the binding region 221 of the first gate layer 416, a portion located in the binding region 221 of the first source / drain layer 421, and a portion located in the binding region 221 of the source / drain portion 423a and the second touch metal layer 434. However, embodiments of the present invention are not limited thereto, and the design of the binding terminals may differ depending on different needs for the binding terminals (e.g., low impedance or small thickness is required). For example, the display panel includes a first source-drain layer, a second source-drain layer, and a third source-drain layer, but the binding terminals may include only the portion located in the binding region of the first gate layer, the portion located in the binding region of the first source-drain layer, and the second touch metal portion; or they may include the portion located in the binding region of the first gate layer, the portion located in the binding region of the first source-drain layer, and a source-drain portion formed by the second source-drain layer or the third source-drain layer; or they may include the portion located in the binding region of the first gate layer, the portion located in the binding region of the first source-drain layer, and a source-drain portion formed by the second source-drain layer and the third source-drain layer, which are not described further here.

[0063] Specifically, as shown in Figure 4, the display panel 2 may further include, in order, a barrier layer 412, a buffer layer 413, a first active layer 414, a first gate insulating layer 415, a first gate layer 416, a second gate insulating layer 417, a second gate layer 418, a flat layer 424, a pixel electrode layer 425, a pixel definition layer 426, a light-emitting material layer 427, a common electrode layer 428, a sealing layer 429, and a cover plate 435.

[0064] Specifically, the material of the first active layer may be low-temperature polycrystalline silicon.

[0065] Specifically, as shown in Figure 4, the touch layer 43 includes a first touch metal layer 432 and a second touch metal layer 434. In Figure 4, the first touch metal layer 432 forms a bridge and the second touch metal layer 434 forms a touch electrode. However, the embodiments of this invention are not limited to this, and it is possible to swap the positions of the two layers.

[0066] Specifically, as shown in Figure 6, the display panel 2 further includes a light-shielding layer 436, a third gate insulating layer 437, a second active layer 438, a fourth gate insulating layer 439, a third gate layer 441, a first flat layer 443, and a second flat layer 444, which are provided in order.

[0067] Specifically, as shown in Figure 10, the display panel 2 further includes a third flat layer 451.

[0068] Specifically, the material of the second active layer may be a metal oxide.

[0069] Specifically, as can be understood, binding terminals may be formed using different film layers of the display panel according to different needs. Therefore, even if the film layer structure of the display area of ​​the display panel is the same, the binding terminals in the binding area may be different. For example, if the display area of ​​the display panel has a first source-drain layer, a second source-drain layer, and a third source-drain layer, one type of binding terminal may use only the metal in the first source-drain layer, while another type of binding terminal may use only the metal in the first and second source-drain layers. If the film layer structure of the display area of ​​the display panel is different, the structure of the binding terminals in the binding area may be the same. For example, one type of display panel has a first source-drain layer, a second source-drain layer, and a third source-drain layer in its display area, while another type of display panel has only the first and second source-drain layers in its display area, but the binding terminals use only the metal in the first and second source-drain layers, resulting in the structure of the binding area shown in Figure 5. Similarly, regarding the structure of other binding regions, the structure of the display region includes various forms, and the film layer in the binding region can be determined based on the structure of the binding region. The film layer structure of the display region is not limited, and the display panel may include one source-drain layer or multiple source-drain layers, one gate layer or multiple gate layers, one active layer or multiple active layers, all of which are applicable to the design of the present invention and are not described here.

[0070] Specifically, while the above-described embodiments specifically described some of the structure of the display panel, the embodiments of this application do not limit the specific film layer structure of the display panel. It should be understood that it is sufficient as long as the display panel can form binding terminals that function properly. The number and position of each insulating layer (including interlayer insulating layer and isolation layer), and the number and position of each metal layer (including source / drain layer, gate layer, and touch metal layer) are not limited, and the corresponding display panel is applicable to the design of the display panel provided by the embodiments of this application.

[0071] Specifically, the above embodiments describe the display panel from the perspective of each film layer and structure, but the embodiments can be combined as long as there is no inconsistency between them. For example, the spacing range between the edge of the first recess and the edge of the source / drain portion can be set to 1 to 3 times the thickness of the source / drain portion, and the spacing range between the edge of the second recess and the edge of the first recess can be set to 1 to 3 times the thickness of the first touch insulating portion.

[0072] Using the display device shown in Figure 1 and the display panel shown in Figure 5 as examples, the interfacial stress between the first touch insulating layer and the interlayer insulating layer in the binding region under reliability test conditions was tested, and the interfacial stress clouds shown in Figures 15 and 16 were obtained. In Figure 15, S and Tresca represent the interfacial stress, and max represents the maximum interfacial stress. Comparing Figures 15 and 16, the maximum interfacial stress between the first touch insulating layer and the interlayer insulating layer in the binding region of the display device shown in Figure 1 is +3.244e+00, i.e., 3.244, and the maximum interfacial stress between the first touch insulating layer and the interlayer insulating layer in the binding region of the display panel shown in Figure 5 is +2.751e+00, i.e., 2.751. The interfacial stress between the first touch insulating layer and the interlayer insulating layer in the binding region of the display panel according to the present invention is reduced by approximately 15% compared to the prior art, reducing the possibility of display panel failure and improving the yield of display panels.

[0073] Furthermore, the embodiments of the present application provide a display device, which includes a display panel as described in any of the above embodiments.

[0074] Specifically, as shown in Figure 17, the display device 20 includes a display panel 2 and a drive chip 3, the drive chip 3 being connected to a binding terminal 31 on the display panel 2.

[0075] In the embodiments described above, each embodiment is given particular emphasis, and for parts of embodiments not described in detail, refer to the relevant descriptions of other embodiments.

[0076] The above has described in detail the display panel and display device according to the embodiments of the present application, and has illustrated the principles and embodiments of the present application with specific examples applicable to the specification of the present application. However, the above description of embodiments is intended only to aid in understanding the present invention and its core idea. Those skilled in the art should understand that it is still possible to modify or replace some of the technical features of the invention described in the above embodiments, and that such modifications or replacements do not cause the essence of the corresponding invention to fall outside the scope of the invention of the embodiments of the present application.

Claims

1. A display panel comprising a display area and a binding area located on at least one side of the display area, wherein the binding area comprises a terminal area and a gap area located between adjacent terminal areas, and binding terminals are provided within the terminal area. The aforementioned display panel is Substrate and, An interlayer insulating layer provided on one side of the substrate, the interlayer insulating layer including an interlayer insulating portion provided in the binding region, A source-drain layer provided on the side of the interlayer insulating layer away from the substrate, the source-drain layer including a source-drain portion provided in the binding region, A touch layer provided on the side of the source-drain layer away from the interlayer insulating layer, comprising a separation layer, wherein the separation layer includes a separation portion provided in the binding region, Within the binding region, the source / drain portion is provided between the interlayer insulating portion and the separation portion, the separation portion is in contact with the source / drain portion and the interlayer insulating portion, and at least one of the interlayer insulating portion and the separation portion includes a recess provided in the gap region. Display panel.

2. The separation layer includes a first touch insulating layer and a second touch insulating layer, the first touch insulating layer is provided between the source / drain layer and the second touch insulating layer, the separation portion includes a first touch insulating portion provided on the first touch insulating layer and a second touch insulating portion provided on the second touch insulating layer, and at least one of the interlayer insulating portion, the first touch insulating portion and the second touch insulating portion includes a recess provided in the gap region. The display panel according to claim 1.

3. The interlayer insulating portion includes a first recess provided in the gap region, The display panel according to claim 2.

4. The first touch insulating portion includes a second recess provided in the gap region, the edge of the first recess being spaced apart from the edge of the source / drain portion, and the edge of the second recess being spaced apart from the edge of the source / drain portion. The display panel according to claim 3.

5. The first touch insulating portion is provided within the first recess, and the orthographic projection of the second recess onto the substrate is within the range of the orthographic projection of the first recess onto the substrate. The display panel according to claim 4.

6. The second touch insulating portion does not have a recess in the gap region, and the second touch insulating portion is filled into the second recess. The display panel according to claim 5.

7. The distance between the edge of the first recess and the edge of the source / drain portion is in the range of 1 to 3 times the thickness of the source / drain portion. The display panel according to claim 4.

8. The distance between the edge of the second recess and the edge of the first recess is 1 to 3 times the thickness of the first touch insulating portion. The display panel according to claim 4.

9. The second touch insulating portion is provided with a third recess in the gap region, the second touch insulating portion is provided within the second recess, and the orthographic projection of the third recess onto the substrate is within the range of the orthographic projection of the second recess onto the substrate. The display panel according to claim 4.

10. The first touch insulating portion includes a recess provided in the gap region, and the interlayer insulating portion does not have a recess provided in the gap region. The display panel according to claim 2.

11. The second touch insulating portion includes a recess provided in the gap region, the interlayer insulating portion does not have a recess in the gap region, and the first touch insulating portion does not have a recess in the gap region. The display panel according to claim 2.

12. The separation layer includes a single touch insulating layer, and the touch insulating layer includes a recess provided in the gap region. The display panel according to claim 1.

13. The interlayer insulating layer includes a first interlayer insulating layer and a second interlayer insulating layer, the source / drain layer includes a first source / drain layer and a second source / drain layer, the first interlayer insulating layer is provided between the first source / drain layer and the substrate, the second interlayer insulating layer is provided between the first source / drain layer and the second source / drain layer, and the interlayer insulating portion is provided in the interlayer insulating layer. The display panel according to claim 1.

14. The source-drain layer further includes a third source-drain layer, the third source-drain layer being provided on the side of the second source-drain layer away from the second interlayer insulating layer, and the source-drain portion being provided on at least one of the second source-drain layer and the third source-drain layer. The display panel according to claim 13.

15. The source-drain portion includes a first portion provided in the second source-drain layer, the source-drain portion includes a second portion provided in the third source-drain layer, the first portion of the source-drain portion and the second portion of the source-drain portion are connected, the first portion of the source-drain portion is provided between the second portion of the source-drain portion and the interlayer insulating portion, the first portion of the source-drain portion is in contact with the interlayer insulating portion, and the second portion of the source-drain portion is in contact with the separation portion. The display panel according to claim 14.

16. The source-drain layer includes a first source-drain layer, a second source-drain layer, and a third source-drain layer, and the source-drain portion is provided in at least one of the first source-drain layer, the second source-drain layer, and the third source-drain layer. The display panel according to claim 1.

17. The source-drain portion includes a third portion provided in the first source-drain layer, a fourth portion provided in the second source-drain layer, and a fifth portion provided in the third source-drain layer, wherein the fourth portion is connected to the third and fifth portions, the third portion is in contact with the interlayer insulating portion, and the fifth portion is in contact with the separation portion. The display panel according to claim 16.

18. The gap region includes a first gap region provided along a first direction and a second gap region provided along a second direction, the recess is provided in at least one of the first gap region and the second gap region, and the angle between the first direction and the second direction is greater than 0 and 90 degrees or less. The display panel according to claim 1.

19. A display device comprising a display panel and a drive chip, wherein the display panel comprises a display area and a binding area located on at least one side of the display area, the binding area comprises a terminal area and a gap area located between adjacent terminal areas, binding terminals are provided within the terminal area, and the drive chip is connected to the binding terminals in the display panel. The aforementioned display panel is Substrate and, An interlayer insulating layer provided on one side of the substrate, the interlayer insulating layer including an interlayer insulating portion provided in the binding region, A source-drain layer provided on the side of the interlayer insulating layer away from the substrate, the source-drain layer including a source-drain portion provided in the binding region, A touch layer provided on the side of the source-drain layer away from the interlayer insulating layer, comprising a separation layer, wherein the separation layer includes a separation portion provided in the binding region, Within the binding region, the source / drain portion is provided between the interlayer insulating portion and the separation portion, the separation portion is in contact with the source / drain portion and the interlayer insulating portion, and at least one of the interlayer insulating portion and the separation portion includes a recess provided in the gap region. Display device.

20. The separation layer includes a first touch insulating layer and a second touch insulating layer, the first touch insulating layer is provided between the source / drain layer and the second touch insulating layer, the separation portion includes a first touch insulating portion provided on the first touch insulating layer and a second touch insulating portion provided on the second touch insulating layer, and at least one of the interlayer insulating portion, the first touch insulating portion and the second touch insulating portion includes a recess provided in the gap region. The display device according to claim 19.

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