Display panel and display device

Abstract

The invention provides a display panel and a display device. According to the display panel, at least one of the interlayer insulation part and the isolation part comprises the groove formed in the spacer region, so that the groove can release the film layer stress of at least one of the interlayer insulation part and the isolation part, the interface stress between the interlayer insulation part and the isolation part is reduced, stripping between the interlayer insulation part and the isolation part is avoided, and the display quality is improved. And even if the interlayer insulation part and the isolation part are stripped, the stripping area can be prevented from being further diffused through the groove, so that the yield of the display panel is improved.

Description

[0001] This divisional application is a divisional application of Chinese patent application No. 202410750197.4, filed on June 11, 2024, entitled "Display Panel and Display Device". Technical Field

[0002] This application relates to the field of display technology, and in particular to a display panel and display device. Background Technology

[0003] Display devices generally consist of a display panel and a driver chip. By setting bonding terminals on the display panel and bonding the driver chip to these terminals, signal communication between the display panel and the driver chip is achieved, enabling the display device to function normally. After bonding the display panel and driver chip, existing display devices undergo reliability testing. This testing typically involves placing the display device in an environment with a temperature of 85 degrees Celsius and humidity of 85% to observe and detect any defects. During testing, it was found that in the bonding area of ​​the display panel, peeling occurred between the interlayer insulation layer and the insulation layer in the touch layer, causing abnormal display images when the display device is turned on.

[0004] Therefore, existing display devices have a technical problem where the insulating layer between the interlayer insulation layer and the insulating layer in the touch layer peels off, causing display abnormalities. Summary of the Invention

[0005] This application provides a display panel and a display device to solve the technical problem that existing display devices suffer from abnormal display due to peeling between the interlayer insulating layer and the insulating layer in the touch layer.

[0006] This application provides a display panel, which includes a display area and a bonding area located on at least one side of the display area. The bonding area includes a terminal area and a spacing area located between adjacent terminal areas. The terminal area is provided with bonding terminals. The display panel includes: Substrate; An interlayer insulating layer is disposed on one side of the substrate, the interlayer insulating layer including an interlayer insulating portion disposed in the bonding region; A source-drain layer is disposed on the side of the interlayer insulating layer away from the substrate, and the source-drain layer includes a source-drain portion disposed in the bonding region; The touch layer is disposed on the side of the source / drain layer away from the interlayer insulating layer. The touch layer includes an isolation layer, and the isolation layer includes an isolation portion disposed in the binding area; In the bonding region, the source / drain portion is disposed between the interlayer insulation portion and the isolation portion, the isolation portion is in contact with the source / drain portion and the interlayer insulation portion, and at least one of the interlayer insulation portion and the isolation portion includes a groove disposed in the spacer region.

[0007] In some embodiments, the isolation layer includes a first touch insulating layer and a second touch insulating layer, the first touch insulating layer being disposed between the source / drain layer and the second touch insulating layer, the isolation portion including a first touch insulating portion disposed on the first touch insulating layer and a second touch insulating portion disposed 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 including a groove disposed in the spacing region.

[0008] In some embodiments, the interlayer insulation portion includes a first groove disposed in the spacer region.

[0009] In some embodiments, the first touch insulating portion includes a second groove disposed in the interval region, the edge of the first groove being spaced apart from the edge of the source / drain portion, and the edge of the second groove being spaced apart from the edge of the source / drain portion.

[0010] In some embodiments, the first touch insulating portion is disposed within the first groove, and the projection of the second groove on the substrate is located within the projection range of the first groove on the substrate.

[0011] In some embodiments, the second touch insulating portion does not have a groove in the interval area, and the second touch insulating portion fills into the second groove.

[0012] In some embodiments, the distance between the edge of the first groove and the edge of the source / drain portion ranges from one to three times the thickness of the source / drain portion.

[0013] In some embodiments, the distance between the edge of the second groove and the edge of the first groove is one to three times the thickness of the first touch insulation portion.

[0014] In some embodiments, the second touch insulating portion has a third groove in the interval area, the second touch insulating portion is disposed in the second groove, and the projection of the third groove on the substrate is located within the projection range of the second groove on the substrate.

[0015] In some embodiments, the first touch insulating portion includes a groove disposed in the interval region, and the interlayer insulating portion does not have a groove in the interval region.

[0016] In some embodiments, the second touch insulating portion includes a groove disposed in the interval region, the interlayer insulating portion does not have a groove in the interval region, and the first touch insulating portion does not have a groove in the interval region.

[0017] In some embodiments, the isolation layer includes a touch insulating layer, and the groove is disposed on the touch insulating layer.

[0018] In some embodiments, 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 disposed between the first source-drain layer and the substrate, the second interlayer insulating layer is disposed between the first source-drain layer and the second source-drain layer, and the interlayer insulating portion is disposed on the interlayer insulating layer.

[0019] In some embodiments, the source-drain layer further includes a third source-drain layer, which is disposed on the side of the second source-drain layer away from the second interlayer insulating layer, and the source-drain portion is disposed within at least one of the second source-drain layer and the third source-drain layer.

[0020] In some embodiments, the source / drain portion includes a first portion disposed on the second source / drain layer, the source / drain portion includes a second portion disposed on 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 disposed between the second portion of the source / drain portion and the interlayer insulation portion, the first portion of the source / drain portion is in contact with the interlayer insulation portion, and the second portion of the source / drain portion is in contact with the isolation portion.

[0021] In some embodiments, 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 disposed within at least one of the first source-drain layer, the second source-drain layer, and the third source-drain layer.

[0022] In some embodiments, the source-drain portion includes a third portion disposed on the first source-drain layer, a fourth portion disposed on the second source-drain layer, and a fifth portion disposed on the third source-drain layer. The fourth portion connects the third portion and the fifth portion. The third portion contacts the interlayer insulation portion, and the fifth portion contacts the isolation portion.

[0023] In some embodiments, the interval region includes a first interval region disposed along a first direction and a second interval region disposed along a second direction, the groove is disposed in at least one of the first interval region and the second interval region, and the angle between the first direction and the second direction is greater than 0 and less than or equal to 90 degrees.

[0024] Meanwhile, this application provides a display device, which includes a display panel and a driver chip as described in any of the above embodiments, wherein the driver chip is connected to a bonding terminal in the display panel.

[0025] Beneficial effects: This application provides a display panel and a display device; the display panel includes a groove disposed in the interval region by making at least one of the interlayer insulating portion and the isolation portion, so that the groove can release the film layer stress of at least one of the interlayer insulating portion and the isolation portion, reduce the interface stress between the interlayer insulating portion and the isolation portion, thereby avoiding peeling between the interlayer insulating portion and the isolation portion, and even if the interlayer insulating portion and the isolation portion peel off, the groove can prevent the peeling area from spreading further, thereby improving the yield of the display panel. Attached Figure Description

[0026] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the structure of a current display device provided in an embodiment of this application.

[0028] Figure 2 This is a first schematic diagram of a display panel provided in an embodiment of this application.

[0029] Figure 3 This is a first schematic diagram of the binding area of ​​a display panel provided in an embodiment of this application.

[0030] Figure 4 This is a second schematic diagram of a display panel provided in an embodiment of this application.

[0031] Figure 5 for Figure 3 The first type of AA cross-sectional view of the display panel in the image.

[0032] Figure 6 This is a third schematic diagram of a display panel provided in an embodiment of this application.

[0033] Figure 7 for Figure 3 The second type of AA cross-sectional view of the display panel in the image.

[0034] Figure 8 for Figure 3 The third type of AA cross-sectional view of the display panel in the image.

[0035] Figure 9 for Figure 3 The fourth type of AA cross-sectional view of the display panel in the image.

[0036] Figure 10This is a fourth schematic diagram of a display panel provided in an embodiment of this application.

[0037] Figure 11 for Figure 3 BB cross-sectional view of the display panel in the image.

[0038] Figure 12 for Figure 3 The fifth type of AA cross-sectional view of the display panel in the image.

[0039] Figure 13 This is a second schematic diagram of the binding area of ​​the display panel provided in an embodiment of this application.

[0040] Figure 14 This is a third schematic diagram of the binding area of ​​the display panel provided in an embodiment of this application.

[0041] Figure 15 for Figure 1 The interface stress cloud diagram between the first touch insulating layer and the interlayer insulating layer in the bonding area of ​​the display device.

[0042] Figure 16 for Figure 5 The interface stress cloud diagram between the first touch insulating layer and the interlayer insulating layer in the bonding area of ​​the display panel.

[0043] Figure 17 This is a schematic diagram of a display device provided in an embodiment of this application. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0045] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0049] To connect with the driver chip, existing display devices use bonding terminals in the bonding area. These terminals are formed by the metal connections of the various film layers, and insulating layers are placed between them to prevent signal crosstalk. For example... Figure 1 As shown, the display device includes 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 metal connections in the first gate film 112, the first source-drain film 115, the second source-drain film 117, and the second touch metal film 120 form bonding terminals 13. The insulating layers are stacked between adjacent bonding terminals 13 to avoid short circuits between adjacent bonding terminals.

[0050] During testing of the display device, it was found that peeling occurred between the interlayer insulating layer and the insulating layer in the touch layer within the bonding area of ​​the display panel. Mechanical analysis of the display device revealed that this was due to a metal film existing between the second interlayer dielectric film 116 and the first touch insulating film 118. Figure 1 The second source / drain film (117) is located in the middle. However, at high temperatures, the coefficient of thermal expansion of the metal is about an order of magnitude higher than that of the inorganic layer. This results in significant thermal stress at the root of the metal film, and structural changes at this location lead to stress concentration. When the thermal stress exceeds the material strength or interface strength, structural failure occurs, causing peeling between the second interlayer dielectric film and the first touch insulating film. This results in abnormal display images when the display device is lit. Therefore, existing display devices suffer from the technical problem of peeling between the interlayer insulating layer and the insulating layer in the touch layer, leading to display abnormalities.

[0051] This application provides a display panel and a display device to address the aforementioned technical problems.

[0052] like Figures 2 to 7 As shown, this application embodiment provides a display panel 2, which includes a display area 21 and a bonding area 221 located on at least one side of the display area 21. The bonding area 221 includes a terminal area 321 and a spacing area located between adjacent terminal areas 321. The terminal area 321 is provided with bonding terminals 31. The display panel 2 includes a substrate 411, an interlayer insulating layer 41, a source-drain layer 42, and a touch layer 43. The interlayer insulating layer 41 is disposed on one side of the substrate 411 and includes an interlayer insulating portion 422a disposed in the bonding area 221. The source-drain layer 42 is disposed on the side of the interlayer insulating layer 41 away from the substrate and includes a source-drain portion 423a disposed in the bonding area. The touch layer 43 is disposed on the side of the source-drain layer 42 away from the interlayer insulating layer 41 and includes an isolation layer 44. The isolation layer 44 includes an isolation portion 44a disposed in the bonding area 221. In the bonding area 221, the source / drain portion 423a is disposed between the interlayer insulation portion 422a and the isolation portion 44a. The isolation portion 44a is in contact with the source / drain portion 423a and the interlayer insulation portion 422a. At least one of the interlayer insulation portion 422a and the isolation portion 44a includes a groove 50 disposed in the spacer area 322.

[0053] This application provides a display panel that includes a groove in the spacer region for at least one of the interlayer insulating portion and the isolation portion. This groove can release the film layer stress of at least one of the interlayer insulating portion and the isolation portion, reduce the interface stress between the interlayer insulating portion and the isolation portion, thereby preventing peeling between the interlayer insulating portion and the isolation portion. Even if peeling occurs between the interlayer insulating portion and the isolation portion, the groove can prevent the peeling area from spreading further, thereby improving the yield of the display panel.

[0054] Specifically, such as Figure 2 As shown, the display panel 2 includes a display area 21 and a non-display area 22, and the non-display area 22 includes a bonding area 221. In this embodiment, the non-display area is described as being located around the display area 21, but this embodiment is not limited to this. The non-display area may not surround the display area, or it may be located on the back of the display panel. Furthermore, the design of the bonding area is not limited to this; the bonding area may be bent to the back of the display panel, and the bonding area is not limited to being located below the display area.

[0055] Specifically, such as Figure 3As shown, the bonding terminal 31 may include an input terminal 311 and an output terminal 312. The input terminal 311 can be connected to the traces in the display area (e.g., data lines or scan lines), and the output terminal 312 can be connected to the driver chip. The input terminal 311 and the output terminal 312 are connected by a connecting line 33, and a row of input terminals 311 and a row of output terminals 312 can be interconnected by the connecting line 33. However, the embodiments of this application are not limited to this, and the design in this application can also be used for other designs that connect to the driver chip via bonding terminals.

[0056] Specifically, Figure 3 Only one row of input terminals 311 and multiple rows of output terminals 312 are shown in the figure, but the embodiments of this application are not limited to this. The number of rows and columns of input terminals 311 and output terminals 312 can be set according to requirements.

[0057] Specifically, since the interlayer insulating layer is formed using a high-temperature process, while the isolation layer is formed using a low-temperature process to prevent the high-temperature process from affecting the performance of the light-emitting material, the performance of the interlayer insulating layer and the isolation layer will still have certain differences due to the different processes. This results in a lower interface strength between the two layers, making them prone to peeling under stress. In this embodiment, by providing a groove on at least one of the interlayer insulating portion and the isolation portion, stress can be released, thereby preventing peeling between the interlayer insulating portion and the isolation portion. Even if peeling occurs between the interlayer insulating portion and the isolation portion, the groove can prevent the peeling area from spreading further, thereby improving the yield of the display panel.

[0058] Specifically, among current methods for improving film peeling issues in display devices, one approach is to increase the interfacial strength between the interlayer insulating layer and the isolation layer, for example, by employing plasma surface treatment technology. However, experiments have shown that this method offers limited improvement in interfacial strength, and the additional steps lead to decreased manufacturing efficiency and increased production costs. Another approach is to change the material of the film layers. However, different film layers have different interfacial strengths, and changing the strength of the film layer requires simultaneous verification of its mechanical, optical, and electrical properties. Each verification involves many aspects, such as mechanical properties including elastic modulus, film formation stress, film strength, and interfacial strength, resulting in a long processing time and potentially failing to meet other requirements. This application's embodiment considers that during high-temperature processes, the structural stress field mainly exhibits localized characteristics. Therefore, the local structural form has a significant impact on the local stress state. Based on this characteristic, by creating grooves in at least one of the interlayer insulating and isolation layers, stress is released, thus improving the problem of peeling between the interlayer insulating and isolation layers.

[0059] In some embodiments, one of the interlayer insulation portion and the isolation portion may include a groove disposed in the spacing region, through which stress is released and the peeling area is prevented from spreading, thereby improving the yield of the display panel.

[0060] In some embodiments, such as Figures 4 to 7 As shown, the isolation layer 44 includes a first touch insulating layer 431 and a second touch insulating layer 433. The first touch insulating layer 431 is disposed between the source-drain layer 42 and the second touch insulating layer 433. The isolation portion 44a includes a first touch insulating portion 431a disposed in the first touch insulating layer 431 and a second touch insulating portion 433a disposed in the second touch insulating layer 433. At least one of the interlayer insulating portion 422a, the first touch insulating portion 431a and the second touch insulating portion 433a includes a groove 50 disposed in the spacing region 322. By including at least one of the interlayer insulation portion, the first touch insulation portion, and the second touch insulation portion in a groove disposed in the interval region, the groove can release the film layer stress of at least one of the interlayer insulation portion, the first touch insulation portion, and the second touch insulation portion, thereby preventing peeling between the interlayer insulation portion and the first touch insulation portion. Even if peeling occurs between the interlayer insulation portion and the first touch insulation portion, the groove can prevent the peeling area from spreading further, thereby improving the yield of the display panel.

[0061] In some embodiments, one of the interlayer insulation portion, the first touch insulation portion, and the second touch insulation portion may include a groove disposed in the interval region, through which stress is released and the peeling area is prevented from spreading, thereby improving the yield of the display panel.

[0062] Specifically, the interlayer insulation portion can include a groove disposed in the interval area. Considering that the stress mainly occurs in the interlayer insulation portion and the first touch insulation portion, by cutting a groove in the interlayer insulation portion, the stress can be released through the interlayer insulation portion. Furthermore, when peeling occurs between the interlayer insulation portion and the first touch insulation portion, the groove can also prevent the peeling area from spreading further, thereby improving the yield of the display panel.

[0063] Specifically, the first touch insulation portion can include a groove disposed in the interval area. Considering that stress mainly occurs in the interlayer insulation portion and the first touch insulation portion, by cutting a groove in the first touch insulation portion, stress can be released through the first touch insulation portion. Furthermore, when peeling occurs between the interlayer insulation portion and the first touch insulation portion, the groove can also prevent the peeling area from spreading further, thereby improving the yield of the display panel.

[0064] Specifically, the second touch insulation portion can include a groove disposed in the interval area. By creating a groove in the second touch insulation portion, stress can be released through the second touch insulation portion. Furthermore, if peeling occurs between the interlayer insulation portion and the first touch insulation portion, the groove can also prevent further spread of the peeling area, thereby improving the yield of the display panel.

[0065] Specifically, when creating a groove in one of the interlayer insulation portion, the first touch insulation portion, and the second touch insulation portion, other film layers located on each film layer can cover the groove. For example, if the interlayer insulation portion has a first touch insulation portion, when creating a groove in the interlayer insulation portion, the first touch insulation portion can fill the groove. When the second touch insulation portion forms a groove, if other insulating film layers exist on it, the groove of the second touch insulation portion can be filled. If there are no other insulating film layers on the second touch insulation portion, the groove of the second touch insulation portion can also be filled.

[0066] In some embodiments, such as Figure 4 , Figure 5 As shown, the interlayer insulating layer 41 includes a first groove 51 disposed in the spacing region 322. By including the first groove in the spacing region in the interlayer insulating layer, the interlayer insulating portion can release stress, and even if the interlayer insulating portion peels off from the first touch insulating portion, the groove can prevent the peeling area from spreading further, thereby improving the yield of the display panel.

[0067] In some embodiments, such as Figure 4 , Figure 5 As shown, the first touch insulating portion 431a includes a second groove 52 disposed in the interval region 322. The edge of the first groove 51a is spaced from the edge of the source / drain portion 423a, and the edge of the second groove 52 is spaced from the edge of the source / drain portion 423a. By including the second groove disposed in the interval region in the first touch insulating layer, stress can be released in both the interlayer insulating portion and the first touch insulating portion. Even if the interlayer insulating portion peels off from the first touch insulating portion, the groove can prevent further diffusion of the peeled area, thereby improving the yield of the display panel. Furthermore, by having a gap between the edge of the first groove and the edge of the source / drain portion, and a gap between the edge of the second groove and the edge of the source / drain portion, water and oxygen can be prevented from invading the metal layer, causing changes in the impedance or other properties of the metal layer, thereby further improving the yield of the display panel.

[0068] Specifically, it can be understood that the groove 50 includes a first groove 51 and a second groove 52.

[0069] In some embodiments, such as Figure 5As shown, the first touch insulating portion 431a is disposed within the first groove 51, and the projection of the second groove 52 on the substrate 411 is located within the projection range of the first groove 51 on the substrate 411. By disposing the first touch insulating portion within the first groove, and ensuring that the projection of the second groove on the substrate is within the projection range of the first groove on the substrate, the width of the second groove is smaller than the width of the first groove. The first touch insulating portion can fill part of the first groove, thereby blocking water and oxygen when they invade from the second groove and the first groove, extending the water and oxygen intrusion path, preventing water and oxygen intrusion from causing display panel failure, and improving the yield of the display panel.

[0070] In some embodiments, such as Figure 5 As shown, the second touch insulating portion 433a does not have a groove in the interval area 322, and the second touch insulating portion 433a fills the second groove 52. By ensuring that the second touch insulating portion does not have a groove in the interval area and fills the second groove, water and oxygen can be prevented from directly invading from the second groove. Even if water and oxygen invade from the corresponding area of ​​the second groove, the path of water and oxygen invading can be lengthened because the second touch insulating portion is filled in the second groove, thus avoiding water and oxygen invading from causing a deterioration in the performance of the display panel and improving the yield of the display panel.

[0071] Specifically, the first groove can penetrate the interlayer insulation part, and the second groove can penetrate the first touch insulation part. This means that when the second touch insulation part fills the second groove, the second touch insulation part also fills the first touch insulation part, thus extending the water and oxygen intrusion path regardless of where water and oxygen invade from.

[0072] In some embodiments, such as Figure 5 As shown, the distance L1 between the edge of the first groove 51 and the edge of the source / drain portion 423a is one to three times the thickness H1 of the source / drain portion 423a. By making the distance between the edge of the first groove and the edge of the source / drain portion one to three times the thickness of the source / drain portion, a certain distance is maintained between the edge of the first groove and the edge of the source / drain portion. Even if water and oxygen intrusion occurs, the path for water and oxygen intrusion can be increased, thereby improving the yield of the display panel.

[0073] Specifically, when the source / drain portion in the interlayer insulation portion and the first touch insulation portion includes only a portion of a source / drain layer, the distance between the first groove and the source / drain portion can be 1 to 1.5 times that of the source / drain portion, or the distance between the first groove and the source / drain portion can be 1 to 3 times that of the source / drain portion; when the source / drain portion in the interlayer insulation portion and the first touch insulation portion includes a portion of two source / drain layers, the distance between the first groove and the source / drain portion can be 1 to 1.5 times that of the source / drain portion.

[0074] In some embodiments, such as Figure 5 As shown, the distance L2 between the edge of the second groove 52 and the edge of the first groove 51 is one to three times the thickness H2 of the first touch insulating portion 431a. By making the distance between the edge of the second groove and the edge of the first groove one to three times the thickness of the first touch insulating portion, a certain distance is maintained between the edges of the first groove and the second groove. Even if water and oxygen intrusion occurs, the path of water and oxygen intrusion can be increased, thereby improving the yield of the display panel.

[0075] Specifically, the above embodiments are illustrated by taking the example of an interlayer insulating portion including a first groove disposed in the interval region and a first touch insulating portion including a second groove disposed in the interval region. However, the embodiments of this application are not limited to this. The interlayer insulating portion may include a first groove disposed in the interval region, the second touch insulating portion may include a third groove disposed in the interval region, and the first touch insulating portion may not have a groove, but may be filled in the first groove. Alternatively, the interlayer insulating portion may not form a groove, the first touch insulating portion may include a second groove disposed in the interval region, and the second touch insulating layer may include a third groove disposed in the interval region.

[0076] In some embodiments, such as Figure 7 As shown, the second touch insulating portion 433a has a third groove 53 formed in the interval region 322. The second touch insulating portion 433a is disposed in the second groove 52, and the projection of the third groove 53 on the substrate 411 is located within the projection range of the second groove 52 on the substrate 411. By forming a third groove in the interval region of the second touch insulating layer, stress can be further released through the third groove on the second touch insulating portion. In the event of peeling between the interlayer insulating portion and the first touch insulating portion, the first groove, the second groove, and the third groove can also block further diffusion of the peeled area, thereby improving the yield of the display panel. Furthermore, by placing the second touch insulating portion in the second groove, the projection of the third groove on the substrate is located within the projection range of the second groove on the substrate, preventing water and oxygen from intruding into the metal layer and causing changes in the impedance or other properties of the metal layer, thereby further improving the yield of the display panel.

[0077] Specifically, such as Figure 7 As shown, the groove 50 includes a first groove 51, a second groove 52 and a third groove 53.

[0078] In some embodiments, such as Figure 8As shown, the first touch insulating portion 431a includes a groove 50 disposed in the interval region 322, while the interlayer insulating portion 422a does not have a groove in the interval region 322. By including a groove in the interval region in the first touch insulating portion and not having a groove in the interval region in the interlayer insulating portion, stress can be released through the groove on the first touch insulating portion. Furthermore, when the interlayer insulating portion peels off from the first touch insulating portion, the groove can also prevent further diffusion of the peeled area, thereby improving the yield of the display panel.

[0079] Specifically, when the first touch insulating part has a groove, the second touch insulating part may or may not have a groove.

[0080] In some embodiments, such as Figure 9 As shown, the second touch insulating portion 433a includes a groove 50 disposed in the interval region 322, while the interlayer insulating portion 422a and the first touch insulating portion 431a do not have grooves in the interval region 322. By including a groove in the interval region in the second touch insulating portion, and not having grooves in the interval region in the interlayer insulating portion and the first touch insulating portion, stress can be released through the groove on the second touch insulating portion. Furthermore, when the interlayer insulating portion peels off from the first touch insulating portion, the groove can also prevent further diffusion of the peeled area, thereby improving the yield of the display panel.

[0081] In some embodiments, such as Figures 10 to 12 As shown, the isolation layer 44 includes a touch insulating layer, which includes a groove 50 disposed in the interval region 322. By making the isolation layer consist of only one touch insulating layer and disposing of the groove in the touch insulating layer, stress can be released from the groove on the touch insulating portion. Furthermore, when there is peeling between the interlayer insulating portion and the isolation portion, the groove can also block further diffusion of the peeling area, thereby improving the yield of the display panel.

[0082] Specifically, such as Figure 11 As shown, Figure 11 The isolation section 44a is shown to have a groove in the second interval region 322b. Figure 12 The isolation portion 44a is shown to have a groove in the first interval region 322a. It can be understood that the isolation portion 44a may have a groove only in the first interval region 322a or the second interval region 322b, or it may have a groove in both the first interval region 322a and the second interval region 322b.

[0083] In some embodiments, such as Figure 5As shown, the interlayer insulating layer 41 includes a first interlayer insulating layer 419 and a second interlayer insulating layer 422, and 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 disposed between the first source-drain layer 421 and the substrate 411, and the second interlayer insulating layer 422 is disposed between the first source-drain layer 421 and the second source-drain layer 423. The interlayer insulating portion 422a is disposed on the second interlayer insulating layer 422. When 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 will contact the first touch insulating layer. Therefore, the second interlayer insulating layer can include an interlayer insulating portion. A groove can be made in at least one of the interlayer insulating portion, the first touch insulating layer, and the second touch insulating layer, thereby preventing peeling between the interlayer insulating portion and the first touch insulating portion. Even if peeling occurs between the interlayer insulating portion and the first touch insulating portion, the spread of the peeling area can be blocked, thereby improving the yield of the display panel.

[0084] Specifically, the second source-drain layer 423 may include source-drain portions 423a.

[0085] Specifically, the above embodiments are illustrated by taking the example of the interlayer insulation layer including a first interlayer insulation layer and a second interlayer insulation layer, and the source-drain layer including a first source-drain layer and a second source-drain layer. However, the embodiments of this application are not limited to this. The interlayer insulation layer may have only one layer, and the source-drain layer may have only one layer. In this case, the interlayer insulation layer includes an interlayer insulation portion, and the source-drain layer includes a source-drain portion.

[0086] Specifically, the above embodiment is illustrated by taking an interlayer insulating layer comprising a first interlayer insulating layer and a second interlayer insulating layer, and a source-drain layer comprising a first source-drain layer and a second source-drain layer, with the second interlayer insulating layer comprising an interlayer insulating portion as an example. This is because, during the fabrication process, the source-drain layer closest to the touch layer is used as the film layer for forming the bonding terminal to facilitate connection to the driver chip. Therefore, the second interlayer insulating layer closest to the touch layer will contact the first touch insulating layer. However, it is understood that the bonding terminal may include a portion of the first source-drain layer but not a portion of the second source-drain layer. In this case, the bonding area only has a portion of the first interlayer insulating layer and not a portion of the second interlayer insulating layer. In this case, the first interlayer insulating layer can include an interlayer insulating portion. That is, when the interlayer insulating layer and the source-drain layer comprise multiple layers, the film layers for the interlayer insulating portion and the source-drain portion can be determined according to the film layers used for the bonding terminal, and it is not limited that the interlayer insulating layer closest to the touch layer and the source-drain layer respectively include an interlayer insulating portion and a source-drain portion.

[0087] In some embodiments, such as Figure 6 , Figure 7As shown, the source-drain layer 42 further includes a third source-drain layer 442, which is disposed on the side of the second source-drain layer 423 away from the second interlayer insulating layer 422. The source-drain portion 423a is disposed within at least one of the second source-drain layer 423 and the third source-drain layer 442. When the source-drain layer includes a third source-drain layer, at least one of the second and third source-drain layers is used to form part of the bonding terminal. Therefore, at least one of the corresponding second and third source-drain layers includes a source-drain portion. By including a groove in the interlayer insulating portion, the first touch insulating portion, and the second touch insulating portion in the spacing region, peeling between the interlayer insulating portion and the first touch insulating portion can be prevented. Even if peeling occurs, the diffusion of the peeling area can be blocked, improving the yield of the display panel.

[0088] In some embodiments, such as Figure 7 As shown, the source / drain portion includes a first portion 511 disposed on the second source / drain layer 423, and a second portion 512 disposed on the third source / drain layer 442. 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 disposed between the second portion 512 of the source / drain portion and the interlayer insulation portion 422a. The first portion 511 of the source / drain portion is in contact with the interlayer insulation portion 422a, and the second portion 512 of the source / drain portion is in contact with the first touch insulation portion 431a. By making the second source-drain layer include a first portion of the source-drain portion and the third source-drain layer include a second portion of the source-drain portion, the bonding terminal can be formed through multiple source-drain layers, reducing the impedance of the bonding terminal. Furthermore, by making at least one of the interlayer insulation portion, the first touch insulation portion, and the second touch insulation portion include a groove provided in the spacing region, peeling between the interlayer insulation portion and the first touch insulation portion can be prevented. Even if peeling between the interlayer insulation portion and the first touch insulation portion occurs, the diffusion of the peeling area can be blocked, thereby improving the yield of the display panel.

[0089] In some embodiments, such as Figures 10 to 12 As shown, 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. The source-drain portion 423a is disposed within at least one of the first source-drain layer 421, the second source-drain layer 423, and the third source-drain layer 442. By disposing the source-drain portion within at least one of the first, second, and third source-drain layers, the source-drain portion can be configured according to requirements.

[0090] Specifically, the source and drain terminals can be disposed within one of the first, second, and third source and drain layers to reduce the thickness of the bonding terminals and prevent them from protruding excessively. Alternatively, they can be disposed within two or three of the first, second, and third source and drain layers to reduce the impedance of the bonding terminals.

[0091] In some embodiments, such as Figure 10 , Figure 11 As shown, the source / drain portion 423a includes a third portion 513 disposed on the first source / drain layer 421, a fourth portion 514 disposed on the second source / drain layer 423, and a fifth portion 515 disposed on the third source / drain layer 442. The fourth portion 514 connects the third portion 513 and the fifth portion 515. The third portion 513 contacts the interlayer insulation portion 422a, and the fifth portion 515 contacts the isolation portion 44a. By including the third portion disposed on the first source / drain layer, the fourth portion disposed on the second source / drain layer, and the fifth portion disposed on the third source / drain layer, the impedance of the bonding terminal is reduced, thereby improving the electrical performance of the bonding terminal.

[0092] In some embodiments, such as Figure 3 , Figure 13 , Figure 14 As shown, the spacing region 322 includes a first spacing region 322a disposed along a first direction X and a second spacing region 322b disposed along a second direction Y. The groove 50 is disposed in at least one of the first spacing region 322a and the second spacing region 322b. The angle between the first direction X and the second direction Y is greater than 0 and less than or equal to 90 degrees. By disposing of the groove in at least one of the first and second spacing regions, stress in at least one direction can be released through the groove. Furthermore, when there is peeling between the interlayer insulation portion and the isolation portion, the groove can also block further diffusion of the peeled area, thereby improving the yield of the display panel.

[0093] Specifically, Figure 3 The image shows that only a portion of the first interval region 322a and a portion of the second interval region 322b have grooves. Figure 13 The diagram shows that the first interval region 322a is provided with an array of grooves. Figure 14 The diagram shows an array of grooves in the second interval region 322b. It is understood that the embodiments of this application do not limit the area where the grooves are located; the grooves can be located in one region or multiple regions of the interval region. Figure 13 and Figure 14 In this embodiment, the grooves are all separately arranged, but the embodiments of this application are not limited to this. Grooves in the same row or column can be connected, and the grooves arranged in the first interval area and the grooves arranged in the second interval area can also be connected.

[0094] Specifically, such as Figure 5 , Figure 7 As shown, the bonding terminal 31 may include a portion of the first gate layer 416 located in the bonding region 221, a portion of the first source-drain layer 421 located in the bonding region 221, a source-drain portion 423a, and a portion of the second touch metal layer 434 located in the bonding region 221. However, the embodiments of this application are not limited to this. Depending on the different requirements for the bonding terminal (e.g., requiring low impedance or small thickness), the design of the bonding terminal may be different. For example, the display panel includes a first source-drain layer, a second source-drain layer, and a third source-drain layer, but the bonding terminal may only include a portion of the first gate layer located in the bonding region, a portion of the first source-drain layer located in the bonding region, and a second touch metal portion; or it may include a portion of the first gate layer located in the bonding region, a portion of the first source-drain layer located in the bonding region, a source-drain portion formed by the second or third source-drain layer; or it may include a portion of the first gate layer located in the bonding region, a portion of the first source-drain layer located in the bonding region, and a source-drain portion formed by the second and third source-drain layers. Further details on this will not be elaborated further.

[0095] Specifically, such as Figure 4 As shown, the display panel 2 also includes, in sequence, 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 planarization layer 424, a pixel electrode layer 425, a pixel definition layer 426, a light-emitting material layer 427, a common electrode layer 428, an encapsulation layer 429, and a cover plate 435.

[0096] Specifically, the material of the first active layer can be low-temperature polycrystalline silicon.

[0097] Specifically, such as Figure 4 As shown, the touch layer 43 includes a first touch metal layer 432 and a second touch metal layer 434. Figure 4 The example described uses the first touch metal layer 432 forming a bridge and the second touch metal layer 434 forming a touch electrode, but the embodiments of this application are not limited to this, and the positions of the two can be interchanged.

[0098] Specifically, such as Figure 6 As shown, the display panel 2 also 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 planarization layer 443, and a second planarization layer 444, which are arranged sequentially.

[0099] Specifically, such as Figure 10 As shown, the display panel 2 also includes a third planarization layer 451.

[0100] Specifically, the material of the second active layer can be a metal oxide.

[0101] Specifically, it's understandable that bonding terminals are formed using different film layers of the display panel depending on different requirements. Therefore, when the film layer structure of the display area of ​​the display panel is the same, the bonding terminals in the bonding area may be different. For example, when 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 bonding terminal may only use the metal from the first source-drain layer, while another type of bonding terminal may only use the metal from the first and second source-drain layers. Conversely, when the film layer structure of the display area of ​​the display panel is different, the structure of the bonding terminals in the bonding 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 only has a first source-drain layer and a second source-drain layer in its display area, but the bonding terminals only use the metal from the first and second source-drain layers. In this case, the structure of their bonding areas may both be the same. Figure 5 As shown, similarly, for the structure of other bonding regions, there may be multiple structures of the display region. The film layer present in the bonding region can be determined based on the structure of the bonding region. The film layer structure of the display region is not limited. The display panel may have 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 these are applicable to the design in this application and will not be elaborated here.

[0102] Specifically, the above embodiments have provided detailed descriptions of the structure of some display panels. It is understood that the embodiments of this application do not limit the specific film layer structure of the display panel, as long as it is ensured that the display panel can form bonding terminals for normal operation. The number and placement of each insulating layer (including interlayer insulating layer and isolation layer) and the number and placement of each metal layer (including source drain layer, gate layer and touch metal layer) are not limited. The corresponding display panels are all applicable to the design of the display panel provided in the embodiments of this application.

[0103] Specifically, it is understood that the above embodiments describe the display panel from the perspective of various film layers and structures. When there is no conflict between the embodiments, the embodiments can be combined. For example, the distance between the edge of the first groove and the edge of the source / drain portion is one to three times the thickness of the source / drain portion, and the distance between the edge of the second groove and the edge of the first groove is one to three times the thickness of the first touch insulating portion.

[0104] by Figure 1 The display device shown and Figure 5 Taking the display panel shown as an example, the interface stress between the first touch insulating layer and the interlayer insulating layer in the bonding area under reliability test conditions was tested, and the results were obtained respectively. Figure 15 , Figure 16 The interface stress contour plot shown is as follows. Figure 15 In this context, S and Tresca represent interfacial stress, and max represents the maximum interfacial stress. Figure 15 , Figure 16 The comparison shows that Figure 1 The maximum interfacial stress between the first touch insulating layer and the interlayer insulating layer within the bonding area of ​​the display device shown is +3.244e+00, i.e., 3.244. Figure 5 The maximum interface stress between the first touch insulating layer and the interlayer insulating layer in the bonding area of ​​the display panel shown is +2.751e+00, i.e. 2.751. It can be seen that the interface stress between the first touch insulating layer and the interlayer insulating layer in the bonding area of ​​the display panel provided in this application is reduced by about 15% compared with the prior art, which reduces the possibility of display panel failure and improves the yield of display panel.

[0105] Meanwhile, this application provides a display device, which includes a display panel as described in any of the above embodiments.

[0106] Specifically, such as Figure 17 As shown, the display device 20 includes a display panel 2 and a driver chip 3, with the driver chip 3 connected to the bonding terminal 31 in the display panel 2.

[0107] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0108] The above provides a detailed description of a display panel and display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display panel, characterized in that, The display panel includes a display area and a bonding area located on at least one side of the display area. The bonding area includes a terminal area and a spacing area located between adjacent terminal areas. The terminal area is provided with bonding terminals. Substrate; An interlayer insulating layer is disposed on one side of the substrate, the interlayer insulating layer including an interlayer insulating portion disposed in the bonding region; a terminal portion is disposed on the side of the interlayer insulating layer away from the substrate and within the bonding region; An isolation portion is disposed on the side of the terminal portion away from the interlayer insulation layer, and the isolation portion is disposed within the bonding area; The display panel further includes a source / drain layer and a touch layer. The terminal portion and the source / drain layer are located on the same metal layer. The isolation portion and the insulating layer in the touch layer are located on the same layer. In the bonding area, the terminal portion is disposed between the interlayer insulating portion and the isolation portion. The isolation portion is in contact with the terminal portion and the interlayer insulating portion. At least one of the interlayer insulating portion and the isolation portion includes a groove disposed in the spacing area.

2. The display panel as described in claim 1, characterized in that, The touch layer includes a first touch insulating layer and a second touch insulating layer. The first touch insulating layer is disposed between the source / drain layer and the second touch insulating layer. The isolation portion includes a first isolation portion and a second isolation portion. The first isolation portion is disposed in the same layer as the first touch insulating layer, and the second isolation portion is disposed in the same layer as the second touch insulating layer. At least one of the interlayer insulating portion, the first isolation portion, and the second isolation portion includes a groove disposed in the interval region.

3. The display panel as described in claim 2, characterized in that, The interlayer insulation portion includes a first groove disposed in the spacer region.

4. The display panel as described in claim 3, characterized in that, The first isolation portion includes a second groove disposed in the interval area, the edge of the first groove being spaced apart from the edge of the terminal portion, and the edge of the second groove being spaced apart from the edge of the terminal portion.

5. The display panel as described in claim 4, characterized in that, The first isolation portion is disposed within the first groove, and the projection of the second groove on the substrate is located within the projection range of the first groove on the substrate.

6. The display panel as described in claim 5, characterized in that, The second isolation portion does not have a groove in the interval area, and the second isolation portion fills into the second groove.

7. The display panel as described in claim 4, characterized in that, The distance between the edge of the first groove and the edge of the terminal portion ranges from one to three times the thickness of the terminal.

8. The display panel as described in claim 4, characterized in that, The distance between the edge of the second groove and the edge of the first groove is one to three times the thickness of the first isolation portion.

9. The display panel as described in claim 4, characterized in that, The second isolation portion has a third groove in the interval area, the second isolation portion is disposed in the second groove, and the projection of the third groove on the substrate is located within the projection range of the second groove on the substrate.

10. The display panel as claimed in claim 2, characterized in that, The first isolation portion includes a groove disposed in the interval region, while the interlayer insulation portion does not have a groove in the interval region.

11. The display panel as claimed in claim 2, characterized in that, The second isolation portion includes a groove disposed in the interval region, the interlayer insulation portion does not have a groove in the interval region, and the first isolation portion does not have a groove in the interval region.

12. The display panel as claimed in claim 1, characterized in that, The touch layer includes a touch insulating layer, and the isolation portion is disposed on the same layer as the touch insulating layer. The isolation portion includes a groove disposed in the interval area.

13. The display panel as claimed in claim 1, characterized in that, 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 disposed between the first source-drain layer and the substrate, the second interlayer insulating layer is disposed between the first source-drain layer and the second source-drain layer, and the interlayer insulating portion is disposed in the second interlayer insulating layer.

14. The display panel as claimed in claim 13, characterized in that, The source-drain layer further includes a third source-drain layer, which is disposed on the side of the second source-drain layer away from the second interlayer insulating layer, and the terminal portion is disposed in the same layer as at least one of the second source-drain layer and the third source-drain layer.

15. The display panel as described in claim 14, characterized in that, The terminal portion includes a first portion disposed on the same layer as the second source-drain layer, and a second portion disposed on the same layer as the third source-drain layer. The first portion and the second portion of the terminal portion are connected. The first portion of the terminal portion is disposed between the second portion of the terminal portion and the interlayer insulation portion. The first portion of the terminal portion is in contact with the interlayer insulation portion, and the second portion of the terminal portion is in contact with the isolation portion.

16. The display panel as claimed in claim 1, characterized in that, The source-drain layer includes a first source-drain layer, a second source-drain layer, and a third source-drain layer, and the terminal portion is located on the same layer as at least one of the first source-drain layer, the second source-drain layer, and the third source-drain layer.

17. The display panel as claimed in claim 16, characterized in that, The terminal portion includes a third portion disposed in the same layer as the first source-drain layer, a fourth portion disposed in the same layer as the second source-drain layer, and a fifth portion disposed in the same layer as the third source-drain layer. The fourth portion connects the third portion and the fifth portion. The third portion contacts the interlayer insulation portion, and the fifth portion contacts the isolation portion.

18. The display panel as claimed in claim 1, characterized in that, The interval region includes a first interval region disposed along a first direction and a second interval region disposed along a second direction, and the groove is disposed in at least one of the first interval region and the second interval region, wherein the angle between the first direction and the second direction is greater than 0 and less than or equal to 90 degrees.

19. A display device, characterized in that, It includes a display panel and a driver chip as described in any one of claims 1 to 18, wherein the driver chip is connected to a bonding terminal in the display panel.

Images