Display panel and display device

Abstract

The present application provides a display panel and a display device; the display panel includes a groove arranged in the spacing area by making at least one of the interlayer insulating part and the isolation part include a groove, so that the groove can release the film layer stress of at least one of the interlayer insulating part and the isolation part, reduce the interface stress between the interlayer insulating part and the isolation part, thereby avoiding peeling between the interlayer insulating part and the isolation part, and even if peeling occurs between the interlayer insulating part and the isolation part, the groove can prevent the peeling area from further spreading, thereby improving the yield of the display panel.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] Display devices generally consist of a display panel and a driver chip. By setting binding terminals on the display panel and binding the driver chip to the binding terminals, signal connectivity is achieved between the display panel and the driver chip, enabling normal operation of the display device. Existing display devices undergo reliability testing after the display panel and driver chip are bound. This reliability test typically involves placing the display device in an environment with a temperature of 85 degrees Celsius and a humidity of 85% to observe and detect defects. During testing of existing display devices, it was discovered that within the binding area of ​​the display panel, delamination occurred between the interlayer insulation layer and the insulation layer in the touch layer, resulting in abnormal display images when the display device was turned on.

[0003] Therefore, the existing display device has a technical problem that peeling occurs between the interlayer insulating layer and the insulating layer in the touch layer, resulting in abnormal display of the display device. Summary of the Invention

[0004] Embodiments of the present application provide a display panel and a display device to solve the technical problem in existing display devices in which peeling occurs between an interlayer insulating layer and an insulating layer in a touch layer, resulting in abnormal display of the display device.

[0005] An embodiment of the present application provides 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 spacing area located between adjacent terminal areas, wherein the terminal area is provided with a binding terminal, and the display panel comprises:

[0006] substrate;

[0007] an interlayer insulating layer, disposed on one side of the substrate, the interlayer insulating layer including an interlayer insulating portion disposed in the binding area;

[0008] a source-drain electrode layer, disposed on a side of the interlayer insulating layer away from the substrate, the source-drain electrode layer including a source-drain electrode portion disposed in the binding region;

[0009] The touch layer is arranged on a side of the source and drain layer away from the interlayer insulating layer.

[0010] The touch layer includes an isolation layer, and the isolation layer includes an isolation portion provided in the binding area;

[0011] In which, within the binding area, the source-drain portion is arranged between the interlayer insulating portion and the isolation portion, the isolation 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 isolation portion includes a groove arranged in the spacer area.

[0012] In some embodiments, the isolation layer includes a first touch insulation layer and a second touch insulation layer, the first touch insulation layer is arranged between the source and drain layer and the second touch insulation layer, the isolation portion includes a first touch insulation portion arranged in the first touch insulation layer and a second touch insulation portion arranged in the second touch insulation layer, and at least one of the interlayer insulation portion, the first touch insulation portion and the second touch insulation portion includes a groove arranged in the spacing area.

[0013] In some embodiments, the interlayer insulating portion includes a first groove disposed in the spacer region.

[0014] In some embodiments, the first touch insulating portion includes a second groove disposed in the spacer region, an edge of the first groove is spaced from an edge of the source / drain portion, and an edge of the second groove is spaced from an edge of the source / drain portion.

[0015] In some embodiments, the first touch insulating portion is disposed in the first groove, and a projection of the second groove on the substrate is located within a projection range of the first groove on the substrate.

[0016] In some embodiments, the second touch insulating portion does not have a groove in the spacing area, and the second touch insulating portion is filled into the second groove.

[0017] In some embodiments, a distance between an edge of the first recess and an edge of the source / drain portion is in a range from one to three times the thickness of the source / drain portion.

[0018] In some embodiments, a distance between an edge of the second groove and an edge of the first groove is in a range from one to three times the thickness of the first touch insulating portion.

[0019] In some embodiments, the second touch insulating portion defines a third groove in the spacing region, the second touch insulating portion is disposed in the second groove, and a projection of the third groove on the substrate is within a projection range of the second groove on the substrate.

[0020] In some embodiments, the first touch insulating portion includes a groove disposed in the spacer region, and the interlayer insulating portion does not have a groove in the spacer region.

[0021] In some embodiments, the second touch insulating portion includes a groove disposed in the spacer region, the interlayer insulating portion does not have a groove in the spacer region, and the first touch insulating portion does not have a groove in the spacer region.

[0022] In some embodiments, the isolation layer includes a touch insulating layer, and the groove is disposed on the touch insulating layer.

[0023] In some embodiments, the interlayer insulating layer includes a first interlayer insulating layer and a second interlayer insulating layer, the source and drain layer includes a first source and drain layer and a second source and drain layer, the first interlayer insulating layer is arranged between the first source and drain layer and the substrate, the second interlayer insulating layer is arranged between the first source and drain layer and the second source and drain layer, and the interlayer insulating part is arranged in the interlayer insulating layer.

[0024] In some embodiments, the source-drain layer further includes a third source-drain layer, the third source-drain layer is arranged on a side of the second source-drain layer away from the second interlayer insulating layer, and the source-drain portion is arranged in at least one of the second source-drain layer and the third source-drain layer.

[0025] In some embodiments, the source-drain portion includes a first portion arranged in the second source-drain layer, the source-drain portion includes a second portion arranged 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 arranged 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 isolation portion.

[0026] 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 in at least one of the first source-drain layer, the second source-drain layer, and the third source-drain layer.

[0027] In some embodiments, the source-drain portion includes a third portion arranged in the first source-drain layer, a fourth portion arranged in the second source-drain layer, and a fifth portion arranged in the third source-drain layer, the fourth portion connects the third portion and the fifth portion, the third portion is in contact with the interlayer insulating portion, and the fifth portion is in contact with the isolation portion.

[0028] In some embodiments, the spacer region includes a first spacer region arranged along a first direction and a second spacer region arranged along a second direction, the groove is arranged in at least one of the first spacer region and the second spacer region, and the angle between the first direction and the second direction is greater than 0 and less than or equal to 90 degrees.

[0029] At the same time, an embodiment of the present application provides a display device, which includes a display panel and a driver chip as described in any of the above embodiments, and the driver chip is connected to the binding terminals in the display panel.

[0030] Beneficial effects: The present application provides a display panel and a display device; the display panel includes a groove arranged in the spacing area by making at least one of the interlayer insulating part and the isolation part include a groove, so that the groove can release the film layer stress of at least one of the interlayer insulating part and the isolation part, reduce the interface stress between the interlayer insulating part and the isolation part, thereby avoiding peeling between the interlayer insulating part and the isolation part, and even if peeling occurs between the interlayer insulating part and the isolation part, the groove can prevent the peeling area from further spreading, thereby improving the yield of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0032] Figure 1 A schematic structural diagram of the current display device provided in an embodiment of the present application.

[0033] Figure 2 This is a first schematic diagram of a display panel provided in an embodiment of the present application.

[0034] Figure 3 This is a first schematic diagram of the binding area of ​​the display panel provided in an embodiment of the present application.

[0035] Figure 4 This is a second schematic diagram of a display panel provided in an embodiment of the present application.

[0036] Figure 5 for Figure 3 A first AA cross-sectional view of the display panel.

[0037] Figure 6 This is a third schematic diagram of the display panel provided in an embodiment of the present application.

[0038] Figure 7 for Figure 3 A second AA cross-sectional view of the display panel.

[0039] Figure 8 for Figure 3 A third AA cross-sectional view of the display panel.

[0040] Figure 9 for Figure 3 A fourth AA cross-sectional view of the display panel.

[0041] Figure 10This is a fourth schematic diagram of the display panel provided in an embodiment of the present application.

[0042] Figure 11 for Figure 3 BB cross-section of the display panel.

[0043] Figure 12 for Figure 3 Fifth AA cross-sectional view of the display panel.

[0044] Figure 13 This is a second schematic diagram of the binding area of ​​the display panel provided in an embodiment of the present application.

[0045] Figure 14 This is a third schematic diagram of the binding area of ​​the display panel provided in an embodiment of the present application.

[0046] Figure 15 for Figure 1 Interface stress cloud diagram between the first touch insulating layer and the interlayer insulating layer in the bonding area of ​​the display device.

[0047] Figure 16 for Figure 5 Interface stress cloud diagram between the first touch insulating layer and the interlayer insulating layer in the binding area of ​​the display panel.

[0048] Figure 17 A schematic diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0050] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0052] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0053] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0054] In order to achieve connection with the driver chip, existing display devices will set binding terminals in the binding area, and the binding terminals are formed by metal connections of each film layer. An insulating layer is set between each binding terminal to prevent signal crosstalk. Figure 1 As shown, it can be seen that 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, which are arranged in sequence. The metals 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 are connected to form a binding terminal 13. The insulating layers are stacked between adjacent binding terminals 13, thereby avoiding the problem of short circuit between adjacent binding terminals.

[0055] When testing the display device, it was found that peeling occurred between the interlayer insulating layer and the insulating layer in the touch layer in the bonding area of ​​the display panel. After mechanical analysis of the display device, it was found that this was due to the presence of a metal film ( Figure 1 (The second source / drain film 117 is shown in the figure.) At high temperatures, the thermal expansion coefficient of the metal is approximately an order of magnitude higher than that of the inorganic layer. This results in significant thermal stress at the base of the metal film, and structural changes there, leading to significant stress concentration. When the thermal stress exceeds the material strength or interface strength, this can cause structural failure, leading to delamination between the second interlayer dielectric film and the first touch insulating film, resulting in an abnormal display image when the display device is turned on. Therefore, existing display devices suffer from the technical problem of delamination between the interlayer insulating layer and the insulating layer in the touch layer, leading to display abnormalities.

[0056] In order to solve the above technical problems, the embodiments of the present application provide a display panel and a display device to solve the above technical problems.

[0057] like Figures 2 to 7 As shown, an embodiment of the present application 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 spacing area located between adjacent terminal areas 321, the terminal area 321 being 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 being provided on one side of the substrate 411, the interlayer insulating layer 41 including an interlayer insulating portion 422a provided in the binding area 221; the source / drain layer 42 being provided on a side of the interlayer insulating layer 41 away from the substrate, the source / drain layer 42 including a source / drain portion 423a provided in the binding area; the touch layer 43 being provided on a side of the source / drain layer 42 away from the interlayer insulating layer 41, the touch layer 43 including an isolation layer 44, the isolation layer 44 including an isolation portion 44a provided in the binding area 221;

[0058] In which, within the binding area 221, the source-drain portion 423a is arranged between the interlayer insulating portion 422a and the isolation portion 44a, the isolation 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 isolation portion 44a includes a groove 50 arranged in the spacer area 322.

[0059] An embodiment of the present application provides a display panel, which includes a groove arranged in the spacing area by making at least one of the interlayer insulating part and the isolation part include a groove, so that the groove can release the film layer stress of at least one of the interlayer insulating part and the isolation part, reduce the interface stress between the interlayer insulating part and the isolation part, thereby avoiding peeling between the interlayer insulating part and the isolation part, and even if peeling occurs between the interlayer insulating part and the isolation part, the groove can prevent the peeling area from further spreading, thereby improving the yield of the display panel.

[0060] 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 binding area 221. In the embodiment of the present application, the non-display area is arranged around the display area 21 as an example for explanation, but the embodiment of the present application is not limited to this. The non-display area may not surround the display area, or the non-display area may be arranged on the back of the display panel. The design of the binding area is also not limited to this. The binding area may be bent to the back of the display panel, and the binding area is not limited to being located below the display area.

[0061] Specifically, such as Figure 3As shown, the binding terminal 31 may include an input terminal 311 and an output terminal 312. The input terminal 311 may be connected to a wiring (e.g., a data line or a scan line) in the display area, and the output terminal 312 may be connected to a driver chip. The input terminal 311 and the output terminal 312 are connected via a connecting wire 33, and a column of input terminals 311 and a column of output terminals 312 may be interconnected via the connecting wire 33. However, the embodiments of the present application are not limited thereto, and the design of the present application may also be adopted for other designs that connect to the driver chip via the binding terminal.

[0062] Specifically, Figure 3 Only one row of input terminals 311 and multiple rows of output terminals 312 are shown, but the embodiments of the present application are not limited thereto. The number of rows and columns of the input terminals 311 and the output terminals 312 can be set as required.

[0063] Specifically, since the interlayer insulating layer is formed using a high-temperature process, when forming the isolation layer, in order to prevent the high-temperature process from affecting the performance of the light-emitting material, the isolation layer will be formed using a low-temperature process. Due to the different processes, even if the materials of the two are the same, there will still be certain differences in the performance of the interlayer insulating layer and the isolation layer, resulting in a low interface strength between the two, which is prone to peeling when subjected to stress. The embodiment of the present application can release stress by providing a groove on at least one of the interlayer insulating part and the isolation part, thereby avoiding peeling between the interlayer insulating part and the isolation part. Even if peeling occurs between the interlayer insulating part and the isolation part, the groove can prevent the peeling area from further spreading, thereby improving the yield of the display panel.

[0064] Specifically, among the current methods for improving the film peeling problem of display devices, one is to improve the interface strength between the film layers of the interlayer insulating layer and the isolation layer, for example, by adopting plasma surface treatment technology. However, experiments have found that the interface strength improvement effect brought by this method is limited, and the additional process will lead to a decrease in preparation efficiency and an increase in production costs. Another method is to change the material of the film layer, but the interface strength of different film layers is different, and the change in the strength of the film layer requires the simultaneous verification of its mechanical properties, optical properties, and electrical properties, and each verification involves many aspects, such as mechanical properties including elastic modulus, film forming stress, film strength, and interface strength light, which takes a long time and may not meet other requirements. The embodiment of the present application takes into account that during high temperature, the structural stress field mainly manifests as local characteristics. Therefore, the local structural form has a greater influence on the state of local stress. Based on this feature, by digging grooves in at least one of the interlayer insulating part and the isolation part, the stress is released, and the peeling problem between the interlayer insulating part and the isolation part is improved.

[0065] In some embodiments, one of the interlayer insulating portion and the isolation portion may include a groove disposed in the spacing region, so that stress is released through the groove and the peeling region is prevented from spreading, thereby improving the yield of the display panel.

[0066] In some embodiments, as Figures 4 to 7 As shown, the isolation layer 44 includes a first touch insulation layer 431 and a second touch insulation layer 433, the first touch insulation layer 431 is arranged between the source and drain layer 42 and the second touch insulation layer 433, the isolation portion 44a includes a first touch insulation portion 431a arranged in the first touch insulation layer 431 and a second touch insulation portion 433a arranged in the second touch insulation layer 433, and at least one of the interlayer insulation portion 422a, the first touch insulation portion 431a and the second touch insulation portion 433a includes a groove 50 arranged in the spacer area 322. By making at least one of the interlayer insulating part, the first touch insulating part and the second touch insulating part include a groove arranged in the spacing area, the groove can release the film layer stress of at least one of the interlayer insulating part, the first touch insulating part and the second touch insulating part, thereby avoiding peeling between the interlayer insulating part and the first touch insulating part, and even if peeling occurs between the interlayer insulating part and the first touch insulating part, the groove can prevent the peeling area from further spreading, thereby improving the yield of the display panel.

[0067] In some embodiments, one of the interlayer insulating portion, the first touch insulating portion, and the second touch insulating portion may include a groove disposed in the spacing region. The groove releases stress and prevents the peeling region from spreading, thereby improving the yield of the display panel.

[0068] Specifically, the interlayer insulating part can include a groove arranged in the spacing area. Considering that stress mainly occurs on the interlayer insulating part and the first touch insulating part, by digging grooves on the interlayer insulating part, the stress can be released through the interlayer insulating part, and peeling can occur between the interlayer insulating part and the first touch insulating part. The grooves can also prevent the peeling area from further spreading, thereby improving the yield of the display panel.

[0069] Specifically, the first touch insulating part can include a groove arranged in the spacing area. Considering that stress mainly occurs on the interlayer insulating part and the first touch insulating part, by digging a groove on the first touch insulating part, the stress can be released through the first touch insulating part, and peeling can occur between the interlayer insulating part and the first touch insulating part. The groove can also prevent the peeling area from further spreading, thereby improving the yield of the display panel.

[0070] Specifically, the second touch insulating portion can include a groove arranged in the spacing area. By digging a groove on the second touch insulating portion, stress can be released through the second touch insulating portion, and peeling can occur between the interlayer insulating portion and the first touch insulating portion. The groove can also prevent the peeling area from further spreading, thereby improving the yield of the display panel.

[0071] Specifically, when grooves are dug in one of the interlayer insulating part, the first touch insulating part and the second touch insulating part, the grooves can be covered by other film layers on each film layer. For example, a first touch insulating part is provided on the interlayer insulating part. When grooves are dug in the interlayer insulating part, the first touch insulating part can be filled in the grooves. When grooves are formed in the second touch insulating part, when there are other insulating film layers on it, the grooves of the second touch insulating part can be filled. When there are no other insulating film layers on the second touch insulating part, the grooves of the second touch insulating part can be filled.

[0072] In some embodiments, as Figure 4 、 Figure 5 As shown, the interlayer insulating layer 41 includes a first groove 51 provided in the spacer region 322. By providing the interlayer insulating layer with the first groove provided in the spacer region, stress can be released from the interlayer insulating portion. Even if delamination occurs between the interlayer insulating portion and the first touch insulating portion, the groove can prevent the delamination from further spreading, thereby improving the yield of the display panel.

[0073] In some embodiments, as Figure 4 、 Figure 5 As shown, the first touch insulating portion 431a includes a second groove 52 disposed in the spacer region 322. A gap exists between the edge of the first groove 51 and the edge of the source-drain portion 423a, and a gap exists between the edge of the second groove 52 and the edge of the source-drain portion 423a. By including the second groove disposed in the spacer region, the first touch insulating layer can release stress in both the interlayer insulating portion and the first touch insulating portion. Even if delamination occurs between the interlayer insulating portion and the first touch insulating portion, the groove prevents further spread of the delamination, thereby improving the yield of the display panel. Furthermore, by providing 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.

[0074] Specifically, it can be understood that the groove 50 includes a first groove 51 and a second groove 52 .

[0075] In some embodiments, 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 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 the projection of the second groove on the substrate being within the projection range of the first groove on the substrate, the width of the second groove is smaller than that of the first groove. The first touch insulating portion can partially fill the first groove. Therefore, when water and oxygen invade from the second and first grooves, the first touch insulating portion and the interlayer insulating portion can block the water and oxygen, extend the water and oxygen intrusion path, prevent water and oxygen intrusion from causing display panel failure, and improve the yield of the display panel.

[0076] In some embodiments, as Figure 5 As shown, the second touch insulating portion 433a does not have a groove in the spacer area 322, and the second touch insulating portion 433a is filled into the second groove 52. By not having a groove in the spacer area and filling the second touch insulating portion into the second groove, water and oxygen can be prevented from directly invading the second groove. Even if water and oxygen invade from the area corresponding to the second groove, the second touch insulating portion is filled into the second groove, which can extend the path of water and oxygen intrusion. This prevents water and oxygen intrusion from causing performance degradation of the display panel, thereby improving the yield of the display panel.

[0077] Specifically, the first groove can penetrate the interlayer insulating part, and the second groove can penetrate the first touch insulating part, so that when the second touch insulating part is filled into the second groove, the second touch insulating part actually fills the first touch insulating part, so that no matter where water and oxygen invade from, the effect of extending the water and oxygen invasion path can be achieved.

[0078] In some embodiments, as Figure 5 As shown, the spacing 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 setting the spacing between the edge of the first groove and the edge of the source-drain portion to 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 intrusion paths are reduced, thereby improving the yield of the display panel.

[0079] Specifically, when the source-drain portion in the interlayer insulating portion and the first touch insulating portion includes only a portion of a source-drain layer, the spacing between the first groove and the source-drain portion can be made 1 to 1.5 times that of the source-drain portion, or the spacing between the first groove and the source-drain portion can be made 1 to 3 times that of the source-drain portion; when the source-drain portion in the interlayer insulating portion and the first touch insulating portion includes a portion of two source-drain layers, the spacing between the first groove and the source-drain portion can be made 1 to 1.5 times that of the source-drain portion.

[0080] In some embodiments, as Figure 5 As shown, the spacing 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 setting the spacing between the edge of the second groove and the edge of the first groove to be 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 intrusion paths are reduced, thereby improving the yield of the display panel.

[0081] Specifically, the above embodiment is described by taking the interlayer insulating part including the first groove arranged in the spacing area and the first touch insulating part including the second groove arranged in the spacing area as an example, but the embodiments of the present application are not limited to this. The interlayer insulating part can include the first groove arranged in the spacing area, the second touch insulating part includes the third groove arranged in the spacing area, the first touch insulating part is not provided with a groove, and the first touch insulating part is filled in the first groove; the interlayer insulating part can also not form a groove, the first touch insulating part includes the second groove arranged in the spacing area, and the second touch insulating layer includes the third groove arranged in the spacing area.

[0082] In some embodiments, as Figure 7 As shown, the second touch insulating portion 433a defines a third groove 53 in the spacer region 322. The second touch insulating portion 433a is disposed within the second groove 52, and the projection of the third groove 53 on the substrate 411 is within the projection of the second groove 52 on the substrate 411. Providing the second touch insulating layer with a third groove in the spacer region allows further stress relief through the third groove on the second touch insulating portion. Furthermore, if delamination occurs between the interlayer insulating portion and the first touch insulating portion, further spread of the delamination region can be prevented by the first, second, and third grooves, thereby improving the yield of the display panel. Furthermore, by disposing the second touch insulating portion within the second groove and with the projection of the third groove on the substrate within the projection of the second groove on the substrate, 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.

[0083] Specifically, such as Figure 7 As shown, the groove 50 includes a first groove 51 , a second groove 52 and a third groove 53 .

[0084] In some embodiments, as Figure 8As shown, the first touch insulating portion 431a includes a groove 50 disposed in the spacer region 322, while the interlayer insulating portion 422a does not have a groove in the spacer region 322. By having the first touch insulating portion include a groove disposed in the spacer region, while the interlayer insulating portion does not have a groove in the spacer region, stress can be released through the groove on the first touch insulating portion. Furthermore, if delamination occurs between the interlayer insulating portion and the first touch insulating portion, the groove can prevent further spread of the delamination, thereby improving the yield of the display panel.

[0085] Specifically, when the first touch insulating portion is provided with a groove, the second touch insulating portion may or may not be provided with a groove.

[0086] In some embodiments, as Figure 9 As shown, the second touch insulating portion 433a includes a groove 50 provided in the spacer region 322, the interlayer insulating portion 422a does not have a groove in the spacer region 322, and the first touch insulating portion 431a does not have a groove in the spacer region 322. By having the second touch insulating portion include a groove provided in the spacer region, while the interlayer insulating portion and the first touch insulating portion do not have grooves in the spacer region, the groove on the second touch insulating portion can relieve stress. Furthermore, if delamination occurs between the interlayer insulating portion and the first touch insulating portion, the groove can prevent further spread of the delamination, thereby improving the yield of the display panel.

[0087] In some embodiments, as Figures 10 to 12 As shown, the isolation layer 44 includes a touch insulation layer, and the touch insulation layer includes a groove 50 provided in the spacer region 322. By having the isolation layer include only one touch insulation layer and the groove provided in the touch insulation layer, stress on the touch insulation portion can be released. Furthermore, when delamination occurs between the interlayer insulation portion and the isolation portion, the groove can prevent further spread of the delamination region, thereby improving the yield of the display panel.

[0088] Specifically, such as Figure 11 As shown, Figure 11 It is shown that the isolation portion 44a is provided with a groove in the second spacing region 322b. Figure 12 It is shown that the isolation portion 44a has a groove in the first spacer 322a. It can be understood that the isolation portion 44a can have a groove only in the first spacer 322a or the second spacer 322b, or can have a groove in both the first spacer 322a and the second spacer 322b.

[0089] In some embodiments, as Figure 5As shown, the interlayer insulating layer 41 includes a first interlayer insulating layer 419 and a second interlayer insulating layer 422, the source and drain layer 42 includes a first source and drain layer 421 and a second source and drain layer 423, the first interlayer insulating layer 419 is arranged between the first source and drain layer 421 and the substrate 411, the second interlayer insulating layer 422 is arranged between the first source and drain layer 421 and the second source and drain layer 423, and the interlayer insulating portion 422a is arranged in 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, and at least one of the interlayer insulating portion, the first touch insulating layer, and the second touch insulating layer can be grooved, thereby preventing peeling between the interlayer insulating portion and the first touch insulating portion. Even if peeling between the interlayer insulating portion and the first touch insulating portion occurs, the diffusion of the peeling area can be blocked, thereby improving the yield of the display panel.

[0090] Specifically, the second source-drain electrode layer 423 may include a source-drain electrode portion 423 a .

[0091] Specifically, the above embodiment is described by taking the example that the interlayer insulating layer includes the first interlayer insulating layer and the second interlayer insulating layer, and the source-drain layer includes the first source-drain layer and the second source-drain layer, but the embodiments of the present application are not limited to this. The interlayer insulating layer can have only one layer, and the source-drain layer can have only one layer. In this case, the interlayer insulating layer includes an interlayer insulating portion, and the source-drain layer includes a source-drain portion.

[0092] Specifically, the above embodiments illustrate the case where the interlayer insulating layer includes a first interlayer insulating layer and a second interlayer insulating layer, and the source / drain electrode layer includes a first source / drain electrode layer and a second source / drain electrode layer, and the second interlayer insulating layer includes an interlayer insulating portion. This is because, during the fabrication process, the source / drain electrode 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 contacts the first touch insulating layer. However, it is understood that the bonding terminal may include a portion of the first source / drain electrode layer but not a portion of the second source / drain electrode layer. In this case, the bonding region only includes 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 may include the interlayer insulating portion. That is, when the interlayer insulating layer and the source / drain electrode layer include multiple layers, the film layers for the interlayer insulating portion and the source / drain electrode portion may be determined based on the film layers used for the bonding terminal, and there is no requirement that the interlayer insulating layer and the source / drain layer closest to the touch layer include the interlayer insulating portion and the source / drain electrode portion, respectively.

[0093] In some embodiments, as Figure 6 、 Figure 7As shown, the source / drain electrode layer 42 further includes a third source / drain electrode layer 442, which is disposed on a side of the second source / drain electrode layer 423 away from the second interlayer insulating layer 422. The source / drain electrode portion 423a is disposed within at least one of the second source / drain electrode layer 423 and the third source / drain electrode layer 442. When the source / drain electrode layer includes the third source / drain electrode layer, at least one of the second source / drain electrode layer and the third source / drain electrode layer forms a portion of the bonding terminal. Accordingly, at least one of the second source / drain electrode layer and the third source / drain electrode layer includes a source / drain electrode portion. Furthermore, by providing at least one of the interlayer insulating portion, the first touch insulating portion, and the second touch insulating portion with a groove in the spacer region, 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 delamination can be prevented, thereby improving the yield of the display panel.

[0094] In some embodiments, as Figure 7 As shown, the source-drain portion includes a first portion 511 arranged in the second source-drain layer 423, and the source-drain portion includes a second portion 512 arranged in the third source-drain layer 442. The first portion 511 of the source-drain portion is connected to the second portion 512 of the source-drain portion. The first portion 511 of the source-drain portion is arranged 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 making the second source-drain electrode layer include the first part of the source-drain electrode portion and the third source-drain electrode layer include the second part of the source-drain electrode portion, the binding terminal can be formed by multiple source-drain electrode layers, thereby reducing the impedance of the binding terminal. By making at least one of the interlayer insulating portion, the first touch insulating portion and the second touch insulating portion include a groove arranged in the spacing area, peeling between the interlayer insulating portion and the first touch insulating portion can be prevented. Even if peeling between the interlayer insulating portion and the first touch insulating portion occurs, the diffusion of the peeling area can be blocked, thereby improving the yield of the display panel.

[0095] In some embodiments, as Figures 10 to 12 As shown, the source-drain electrode layer 42 includes a first source-drain electrode layer 421, a second source-drain electrode layer 423, and a third source-drain electrode layer 442. The source-drain electrode portion 423a is disposed in at least one of the first source-drain electrode layer 421, the second source-drain electrode layer 423, and the third source-drain electrode layer 442. By disposing the source-drain electrode portion in at least one of the first source-drain electrode layer, the second source-drain electrode layer, and the third source-drain electrode layer, the source-drain electrode portion can be provided as required.

[0096] Specifically, the source-drain portion can be disposed within one of the first, second, and third source-drain layers to reduce the thickness of the bonding terminal and prevent the bonding terminal from protruding too much. Alternatively, the source-drain portion can be disposed within two or three of the first, second, and third source-drain layers to reduce the impedance of the bonding terminal.

[0097] In some embodiments, as Figure 10 、 Figure 11 As shown, the source-drain portion 423a includes a third portion 513 provided in the first source-drain layer 421, a fourth portion 514 provided in the second source-drain layer 423, and a fifth portion 515 provided in 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 insulating portion 422a, and the fifth portion 515 contacts the isolation portion 44a. By having the source-drain portion include the third portion provided in the first source-drain layer, the fourth portion provided in the second source-drain layer, and the fifth portion provided in the third source-drain layer, the impedance of the bonding terminal is reduced, thereby improving the electrical performance of the bonding terminal.

[0098] In some embodiments, as Figure 3 、 Figure 13 、 Figure 14 As shown, the spacer 322 includes a first spacer 322a arranged along a first direction X and a second spacer 322b arranged along a second direction Y. The groove 50 is provided in at least one of the first spacer 322a and the second spacer 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 providing the groove in at least one of the first and second spacers, stress in at least one direction can be released through the groove. In addition, if delamination occurs between the interlayer insulating portion and the isolation portion, the groove can also prevent further spread of the delamination, thereby improving the yield of the display panel.

[0099] Specifically, Figure 3 FIG. 3 shows that only a portion of the first spacer 322a and a portion of the second spacer 322b are provided with grooves. Figure 13 FIG. 3 shows that the first spacer 322a is provided with an array of grooves. Figure 14 The second spacer 322b is shown to have an array of grooves. It is understood that the embodiment of the present application does not limit the area where the grooves are set. The grooves can be set in one area or in multiple areas in the spacer. Figure 13 and Figure 14 In the embodiment, the grooves are arranged separately, but the embodiments of the present application are not limited thereto. The grooves in the same row or column can be connected, and the grooves arranged in the first spacing area can also be connected to the grooves arranged in the second spacing area.

[0100] 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 area 221, a portion of the first source-drain layer 421 located in the bonding area 221, a source-drain portion 423a, and a portion of the second touch metal layer 434 located in the bonding area 221. However, the embodiments of the present application are not limited thereto. Depending on different requirements for the bonding terminal (e.g., requiring lower impedance or requiring a smaller thickness), the design of the bonding terminal may vary. 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 area, a portion of the first source-drain layer located in the bonding area, and the second touch metal portion. Alternatively, the bonding terminal may include a portion of the first gate layer located in the bonding area, a portion of the first source-drain layer located in the bonding area, and a source-drain portion formed by the second source-drain layer or the third source-drain layer. Alternatively, the bonding terminal may include a portion of the first gate layer located in the bonding area, a portion of the first source-drain layer located in the bonding area, and a source-drain portion formed by the second source-drain layer and the third source-drain layer. This will not be described in detail here.

[0101] Specifically, such as Figure 4 As shown, the display panel 2 also includes a blocking 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 planarizing 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, which are arranged in sequence.

[0102] Specifically, the material of the first active layer may be low-temperature polysilicon.

[0103] 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 In the description, the first touch metal layer 432 forms a bridge and the second touch metal layer 434 forms a touch electrode. However, the embodiment of the present application is not limited thereto, and the positions of the two can be swapped.

[0104] Specifically, such as Figure 6 As shown, 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 planarization layer 443 and a second planarization layer 444 , which are sequentially arranged.

[0105] Specifically, such as Figure 10 As shown, the display panel 2 further includes a third planarization layer 451 .

[0106] Specifically, the material of the second active layer may be metal oxide.

[0107] Specifically, it can be understood that the binding terminals will be formed by different film layers of the display panel according to different needs. Therefore, when the film layer structure of the display area of ​​the display panel is the same, the binding terminals of the binding area may be different. For example, when a first source-drain electrode layer, a second source-drain electrode layer and a third source-drain electrode layer are provided in the display area of ​​the display panel, one binding terminal may only use the metal in the first source-drain electrode layer, and another binding terminal may only use the metal in the first source-drain electrode layer and the second source-drain electrode layer; when the film layer structure of the display area of ​​the display panel is different, the structure of the binding terminals of the binding area may be the same. For example, a first source-drain electrode layer, a second source-drain electrode layer and a third source-drain electrode layer are provided in the display area of ​​one display panel, and another display panel only has the first source-drain electrode layer and the second source-drain layer in the display area, but the binding terminals only use the metal in the first source-drain layer and the second source-drain layer, then the structure of their binding areas may be the same. Figure 5 As shown, similarly, for the structures of other binding areas, there may be multiple structures of the display area. The film layer existing in the binding area can be determined according to the structure of the binding area. There is no limitation on the film layer structure of the display area. The display panel can have one source and drain layer or multiple source and drain layers, one gate layer or multiple gate layers, one active layer or multiple active layers, which are all applicable to the design in this application and will not be repeated here.

[0108] Specifically, the above embodiments provide a detailed description of the structure of some display panels. It can be understood that the embodiments of the present application do not limit the specific film layer structure of the display panel. It is only necessary to ensure that the display panel can form a binding terminal that works normally. There is no limitation on the number and setting position of each insulating layer (including interlayer insulating layer and isolation layer), and the number and setting position of each metal layer (including source and drain layer, gate layer and touch metal layer). The corresponding display panels are all applicable to the design of the display panel provided in the embodiments of the present application.

[0109] 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.

[0110] by Figure 1 The display device shown and Figure 5 Taking the display panel shown in FIG. as an example, the interface stress between the first touch insulating layer and the interlayer insulating layer in the bonding area under the reliability test condition is tested, and the results are respectively Figure 15 、 Figure 16 The interface stress cloud diagram shown is Figure 15 S in Tresca represents the interface stress, and max represents the maximum interface stress. Figure 15 、 Figure 16 The comparison shows that Figure 1 The maximum interface stress between the first touch insulating layer and the interlayer insulating layer in the bonding area of ​​the display device shown is +3.244e+00, that is, 3.244, Figure 5 The maximum interface stress between the first touch insulating layer and the interlayer insulating layer in the binding area of ​​the display panel shown is +2.751e+00, that is, 2.751. It can be seen that the interface stress between the first touch insulating layer and the interlayer insulating layer in the binding area of ​​the display panel provided in the present application is reduced by about 15% compared with the prior art, which reduces the possibility of failure of the display panel and improves the yield of the display panel.

[0111] At the same time, an embodiment of the present application provides a display device, which includes the display panel as described in any of the above embodiments.

[0112] Specifically, such as Figure 17 As shown, the display device 20 includes a display panel 2 and a driver chip 3 , and the driver chip 3 is connected to the binding terminal 31 in the display panel 2 .

[0113] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0114] The above is a detailed introduction to a display panel and a display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises 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 spacing area located between adjacent terminal areas, and a binding terminal is provided in the terminal area. The display panel comprises: substrate; an interlayer insulating layer, disposed on one side of the substrate, the interlayer insulating layer including an interlayer insulating portion disposed in the binding area; a source-drain electrode layer, disposed on a side of the interlayer insulating layer away from the substrate, the source-drain electrode layer including a source-drain electrode portion disposed in the binding region; a touch layer, disposed on a side of the source and drain electrode layer away from the interlayer insulating layer, the touch layer comprising an isolation layer, and the isolation layer comprising an isolation portion disposed in the binding region; In which, within the binding area, the source-drain portion is arranged between the interlayer insulating portion and the isolation portion, the isolation 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 isolation portion includes a groove arranged in the spacer area.

2. The display panel according to claim 1, wherein The isolation layer includes a first touch insulation layer and a second touch insulation layer, the first touch insulation layer is arranged between the source and drain layer and the second touch insulation layer, the isolation portion includes a first touch insulation portion arranged in the first touch insulation layer and a second touch insulation portion arranged in the second touch insulation layer, and at least one of the interlayer insulation portion, the first touch insulation portion and the second touch insulation portion includes a groove arranged in the spacing area.

3. The display panel according to claim 2, wherein: The interlayer insulating portion includes a first groove disposed in the spacer region.

4. The display panel according to claim 3, wherein: The first touch insulating portion includes a second groove disposed in the spacer region, an edge of the first groove is spaced from an edge of the source / drain portion, and an edge of the second groove is spaced from an edge of the source / drain portion.

5. The display panel according to claim 4, wherein: The first touch insulating portion is disposed in the first groove, and a projection of the second groove on the substrate is located within a projection range of the first groove on the substrate.

6. The display panel according to claim 5, wherein: The second touch insulating portion has no groove in the spacing area, and the second touch insulating portion is filled into the second groove.

7. The display panel according to claim 4, wherein: A distance between an edge of the first groove and an edge of the source / drain portion is in a range from one to three times the thickness of the source / drain portion.

8. The display panel according to claim 4, wherein: The distance between the edge of the second groove and the edge of the first groove is in a range from one to three times the thickness of the first touch insulating portion.

9. The display panel according to claim 4, wherein: The second touch insulating portion defines a third groove in the spacing region. The second touch insulating portion is disposed in the second groove. A projection of the third groove on the substrate is within a projection range of the second groove on the substrate.

10. The display panel according to claim 2, wherein: The first touch insulating portion includes a groove disposed in the spacing area, and the interlayer insulating portion does not have a groove in the spacing area.

11. The display panel according to claim 2, wherein: The second touch insulating portion includes a groove disposed in the spacer area, the interlayer insulating portion has no groove in the spacer area, and the first touch insulating portion has no groove in the spacer area.

12. The display panel according to claim 1, wherein The isolation layer includes a touch insulating layer, and the touch insulating layer includes a groove arranged in the spacing area.

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

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

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

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

17. The display panel according to claim 16, wherein: The source-drain portion includes a third portion arranged in the first source-drain layer, a fourth portion arranged in the second source-drain layer, and a fifth portion arranged in the third source-drain layer, the fourth portion connects the third portion and the fifth portion, the third portion is in contact with the interlayer insulating portion, and the fifth portion is in contact with the isolation portion.

18. The display panel according to claim 1, wherein The spacer area includes a first spacer area arranged along a first direction and a second spacer area arranged along a second direction. The groove is arranged in at least one of the first spacer area and the second spacer area. 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: The display panel comprises a display panel according to any one of claims 1 to 18 and a driver chip, wherein the driver chip is connected to the binding terminals in the display panel.

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