Display panel and display device

Abstract

The invention provides a display panel and a display device, and relates to the technical field of display, the display panel comprises a substrate, and a display function layer, a first insulating layer, a second insulating layer and a polaroid which are arranged on the same side of the substrate; the display panel comprises a display area and a first non-display area located on one side of the display area in the second direction, and the first non-display area comprises a binding area; the polaroid, the second insulating layer and the first insulating layer are located in the display area and at least part of the first non-display area and are not overlapped with the binding area; the display panel further comprises a first protection layer and a second protection layer, the first protection layer is located in the first non-display area, and the first protection layer is located on the side, away from the substrate, of the second insulation layer. The second protection layer is located on the side, away from the substrate, of the polaroid and covers the polaroid, and the second protection layer is overlapped with at least part of the first protection layer in the first direction. Therefore, the packaging reliability of a display product is improved, and the performance stability of the product is improved.

Description

Technical Field

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

[0002] With the continuous development of science and technology, more and more display products, such as mobile phones, tablets, laptops and smart wearable devices, are widely used in people's daily life and work, bringing great convenience to people's daily life and work, and becoming an indispensable tool for people today.

[0003] Packaging reliability is one of the important indicators for evaluating the performance of display products. How to improve the packaging reliability of display products to improve the stability of the overall performance of the product has become one of the technical problems that need to be solved urgently at this stage. Summary of the invention

[0004] In order to solve the above technical problems, the present disclosure provides a display panel and a display device, aiming to improve the packaging reliability of the product and further improve the performance reliability of the product.

[0005] In a first aspect, the present disclosure provides a display panel, comprising a substrate, and a display function layer, a first insulating layer, a second insulating layer, and a polarizer disposed on the same side of the substrate, wherein along a first direction, the first insulating layer is located on a side of the display function layer away from the substrate, the second insulating layer is located on a side of the first insulating layer away from the substrate, and the polarizer is located on a side of the second insulating layer away from the substrate, and the first direction is perpendicular to a plane where the substrate is located;

[0006] The display panel includes a display area and a first non-display area located on one side of the display area along a second direction, the first non-display area includes a binding area; a polarizer is located in the display area and at least a portion of the first non-display area, a second insulating layer and a first insulating layer are located in the display area and at least a portion of the first non-display area, and along the first direction, the polarizer, the second insulating layer and the first insulating layer do not overlap with the binding area;

[0007] The display panel also includes a first protective layer and a second protective layer. The first protective layer is located in the first non-display area. Along the first direction, the first protective layer is located on the side of the second insulating layer away from the substrate and overlaps with the second insulating layer, the first insulating layer and the binding area; the second protective layer is located on the side of the polarizer away from the substrate and covers the polarizer. Along the first direction, the second protective layer overlaps with at least part of the first protective layer.

[0008] In a second aspect, based on the same inventive concept, the present disclosure provides a display device, comprising the display panel provided in the first aspect of the present disclosure.

[0009] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0010] In the display panel provided by the present disclosure, a second protective layer is introduced on the side of the polarizer away from the substrate, and the second protective layer covers the polarizer. That is to say, along the first direction, the orthographic projection of the second protective layer on the substrate covers the orthographic projection of the polarizer on the substrate. In particular, along the first direction, the second protective layer also overlaps at least a part of the first protective layer, which is equivalent to that the second protective layer extends further in the direction of the bonding area and covers at least a part of the area of the first protective layer, that is, the second protective layer is in direct contact with the first protective layer. In this way, during the reliability test, for example, in a high-temperature and high-humidity environment, even when the polarizer shrinks due to its own material properties, since the second protective layer and the first protective layer are in direct contact and pull each other, the second protective layer does not shrink with the shrinkage of the polarizer, and the second protective layer can still cover the area between the polarizer and the first protective layer. The second protective layer can isolate external moisture and impurities. Even if cracks are generated in the second insulating layer and the first insulating layer due to the shrinkage stress of the polarizer, external moisture and impurities will not be able to enter the above cracks through the second protective layer, which is beneficial to improving the overall packaging reliability of the display panel and further beneficial to improving the performance stability of the display panel. Description of the Drawings

[0011] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 Shown is a top view of a display panel provided by an embodiment of the present disclosure;

[0014] Figure 2 Shown as Figure 1 an AA-direction cross-sectional view of the display panel in

[0015] Figure 3 Shown as Figure 1 a BB-direction cross-sectional view of the display panel in

[0016] Figure 4 Shown is a schematic diagram of a film layer after the flip-chip film is bent;

[0017] Figure 5 Shown is a schematic diagram of a film layer of a display panel in the prior art before the reliability test;

[0018] Figure 6 The figure shows a schematic diagram of a film layer of a display panel in the related art after a reliability test;

[0019] Figure 7 The figure shows a schematic diagram of a film layer of a display panel in an embodiment of the present disclosure after a reliability test;

[0020] Figure 8 The figure shows a top view relationship diagram of a polarizer and a first protective layer provided by an embodiment of the present disclosure;

[0021] Figure 9 The figure shows a partial schematic diagram of a polarizer provided by an embodiment of the present disclosure;

[0022] Figure 10 The figure shows another partial schematic diagram of a polarizer provided by an embodiment of the present disclosure;

[0023] Figure 11 The figure shows another top view of a display panel provided by an embodiment of the present disclosure;

[0024] Figure 12 The figure shows Figure 11 a CC-direction cross-sectional view of the display panel in;

[0025] Figure 13 The figure shows a schematic diagram of a film layer of a display panel when the polarizer is retracted;

[0026] Figure 14 The figure shows another top view of a display panel provided by an embodiment of the present disclosure;

[0027] Figure 15 The figure shows another plane schematic diagram of a display panel provided by an embodiment of the present disclosure;

[0028] Figure 16 The figure shows another top view structure diagram of a display panel provided by an embodiment of the present disclosure;

[0029] Figure 17 The figure shows Figure 16 a DD-direction cross-sectional view of the display panel in the embodiment;

[0030] Figure 18 The figure shows Figure 16 another DD-direction cross-sectional view of the display panel in the embodiment;

[0031] Figure 19 The figure shows another top view structure diagram of a display panel provided by an embodiment of the present disclosure;

[0032] Figure 20 The figure shows Figure 19 an EE-direction cross-sectional view of the display panel in the embodiment;

[0033] Figure 21 As shown Figure 19 Another EE-direction cross-sectional view of the display panel in the embodiment;

[0034] Figure 22 As shown is a schematic structural diagram of a display device provided by an embodiment of the present disclosure. Detailed implementation manners

[0035] In order to more clearly understand the above objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments may be combined with each other.

[0036] Many specific details are set forth in the following description in order to fully understand the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all the embodiments.

[0037] Figure 1 As shown is a top view of a display panel provided by an embodiment of the present disclosure, Figure 2 As shown Figure 1 A cross-sectional view of the display panel in the AA direction in Figure 3 As shown Figure 1 A cross-sectional view of the display panel in the BB direction in. It should be noted that Figure 1 Only a display panel with a rectangular structure is taken as an example for illustration, and the actual shape of the display panel is not limited. In some other embodiments of the present disclosure, the display panel may also be embodied as other feasible shapes such as a circle, a rounded rectangle, etc. Figure 1 The embodiment schematically shows the light-emitting elements in the display panel, but does not limit the actual number, shape and arrangement of the light-emitting elements.

[0038] Please refer to Figure 1 、 Figure 2 and Figure 3 wherein, Figure 2 schematically shows some film layer structures in the display area A0 of the display panel, Figure 3The partial film layer structure of the non-display area A1 of the display panel is schematically shown. An embodiment of the present disclosure provides a display panel 100, which includes a substrate 00, and a display function layer 10, a first insulating layer 20, a second insulating layer 30, and a polarizer 40 disposed on the same side of the substrate 00. Along the first direction D1, the first insulating layer 20 is located on the side of the display function layer 10 away from the substrate 00, the second insulating layer 30 is located on the side of the first insulating layer 20 away from the substrate 00, and the polarizer 40 is located on the side of the second insulating layer 30 away from the substrate 00. The first direction D1 is perpendicular to the plane where the substrate 00 is located. Optionally, the display function layer 10 includes a driving layer 11 and a light-emitting element layer 12. The driving layer 11 includes a transistor M, and the light-emitting element layer 12 includes a plurality of light-emitting elements 70. The first insulating layer 20 can be an encapsulation layer for encapsulating the light-emitting elements 70 to prevent external moisture, oxygen, and other impurities from affecting the characteristics of the display panel. Optionally, the aforementioned encapsulation layer includes a first inorganic layer 21, an organic layer 22, and a second inorganic layer 23 stacked. In the first non-display area A1, the cut-off position of the organic layer 22 is farther from the bonding area A11 than the cut-off positions of the first inorganic layer 21 and the second inorganic layer 23. In the area near the bonding area A11, the first inorganic layer 21 and the second inorganic layer 23 are in direct contact. In some other embodiments of the present disclosure, the first insulating layer 20 can also be other film layers. For example, when the display panel includes a touch layer, if the touch layer includes two touch metal layers, the first insulating layer 20 can be an insulating film layer for isolating the two touch metal layers. A second insulating layer 30 and a polarizer 40 are disposed on the side of the first insulating layer 20 away from the substrate 00. The second insulating layer 30 is, for example, an organic planarization layer. When a touch layer is provided in the display area of the display panel, the second insulating layer 30 is used to cover the touch layer and form a planarization film layer on the side of the touch layer away from the substrate.

[0039] Please refer to Figure 1 and Figure 3 , the display panel 100 includes a display area A0 and a first non-display area A1 located on one side of the display area A0 along the second direction D2. The first non-display area A1 includes a bonding area A11, and a bonding pad P0 is provided in the bonding area A11. Figure 3 Only one composition of the bonding pad is schematically shown, and the actual film layer structure of the bonding pad P0 is not limited. The bonding area A11 is used for bonding a chip on film (COF), and a control chip IC is located on the chip on film (COF). It should be noted that Figure 1 Only the case where the chip on film (COF) has not been bent is schematically shown. In an actual product, the chip on film (COF) will be bent to the side of the substrate 00 away from the light-emitting surface of the display panel. For example, please refer to Figure 4 , Figure 4The figure shows a schematic diagram of a film layer after the flip-chip thin film COF is bent. One end of the flip-chip thin film 60 is bonded to the bonding pad P0, and the other end is bent to the side of the substrate 00 facing away from the light-emitting surface of the display panel. The control chip IC is located on the flip-chip thin film 60. After the flip-chip thin film 60 is bonded to the bonding pad P0, the bonding pad P0 can be electrically connected to the control chip IC through the flip-chip thin film 60. After the flip-chip thin film 60 is bent to the side of the substrate 00 facing away from the light-emitting surface of the display panel, the control chip IC is also bent to the side of the substrate 00 facing away from the light-emitting surface of the display panel.

[0040] Please continue to refer to Figure 1 、 Figure 3 and Figure 4 . The polarizer 40 is located in the display area A0 and at least part of the first non-display area A1. The second insulating layer 30 and the first insulating layer 20 are located in the display area A0 and at least part of the first non-display area A1. Along the first direction D1, the polarizer 40, the second insulating layer 30, and the first insulating layer 20 do not overlap with the bonding area A11. That is to say, the polarizer 40 covers the entire display area A0 and extends to at least part of the area in the first non-display area A1, and does not extend above the bonding area A11 to avoid interference with the bonding area A11. In addition to covering the display area A0, the second insulating layer 30 and the first insulating layer 20 also extend to the first non-display area A1 and do not extend above the bonding area A11. Optionally, the extension amount of the second insulating layer 30 and the first insulating layer 20 to the first non-display area A1 is greater than the extension amount of the polarizer 40 to the first non-display area A1. That is to say, the ends of the second insulating layer 30 and the first insulating layer 20 in the first non-display area A1 extend beyond the ends of the polarizer 40 in the first non-display area A1, and the ends of the second insulating layer 30 and the first insulating layer 20 are closer to the bonding area A11 than the ends of the polarizer 40.

[0041] Please continue to refer to Figure 3 . The display panel further includes a first protective layer 50 and a second protective layer 60. The first protective layer 50 is located in the first non-display area A1. Along the first direction D1, the first protective layer 50 is at least located on the side of the second insulating layer 30 facing away from the substrate 00. Optionally, the end face of the polarizer 40 facing the bonding area A11 is in contact with the end face of the first protective layer 50 facing the display area A0. Optionally, the first protective layer 50 can be a UV glue. After the flip-chip thin film COF is bonded in the bonding area A11 of the display panel, the first protective layer 50 is used to cover the flip-chip thin film COF in the bonding area A11 and plays a role in fixing the flip-chip thin film COF. Optionally, the second protective layer 60 can be an optically transparent glue. The second protective layer 60 is located on the side of the polarizer 40 facing away from the substrate 00 and covers the polarizer 40. Along the first direction D1, the second protective layer 60 overlaps with the polarizer 40 and at least part of the second protective layer 60. The second protective layer 60 can be used for the bonding of the cover plate and the display panel. For example, please refer toFigure 4 。

[0042] Optionally, the display panel provided in this embodiment may be a display panel using organic light-emitting diode display technology, that is, an OLED (Organic Light-Emitting Diode) display panel. Figure 2 A connection relationship of the light-emitting elements 70 in the display area A0 is schematically shown. Please refer to Figure 1 and Figure 2 . The basic structure of the light-emitting element 70 of the OLED display panel includes an anode 701, a light-emitting material layer 702, and a cathode 703. When a suitable voltage is supplied by the power supply, the holes generated by the anode 701 and the electrons generated by the cathode 703 will combine in the light-emitting material layer 702 to generate bright light. The anode 701 of the light-emitting element is electrically connected to the array layer 11, and the array layer 11 and the light-emitting element 70 together constitute the display function layer 10 mentioned in the embodiments of the present disclosure. Compared with liquid crystal displays, the OLED display panel has the characteristics of high visibility and high brightness, and is more power-saving, light in weight, and thin in thickness. Of course, in some other embodiments of the present invention, the display panel may also be a display panel using inorganic light-emitting diode display technology, such as a Micro LED display panel, or a Mini LED display panel, etc. The present disclosure is not limited thereto.

[0043] It should be noted that neither the second insulating layer 30 nor the first insulating layer 20 in the embodiments of the present disclosure covers the bonding area A11. Therefore, a height difference will be generated between the bonding area A11 and the first non-display area A1 on the side of the bonding area A11 facing the display area A0. When the first protective layer 50 is introduced into the first non-display area A1 in the embodiments of the present disclosure, the first protective layer 50 can not only fix the chip-on-film (COF) bonded to the bonding area A11, but also compensate for the above-mentioned height difference. An optional embodiment of the present disclosure is that the plane on the side of the first protective layer 50 facing away from the substrate 00 and the plane on the side of the polarizer 40 facing away from the substrate 00 are located in the same plane.

[0044] For display products, reliability tests are usually carried out before leaving the factory. Figure 5 The figure shows a schematic diagram of a film layer of a display panel in the related art before the reliability test. Figure 6The figure shows a schematic diagram of a film layer of a display panel in the related art after a reliability test. The display panel includes an array layer 10', a first insulating layer 20', a second insulating layer 30', and a polarizer 40' which are stacked. The end of the polarizer 40' is in contact with a protective adhesive layer 50'. During the reliability test before the product leaves the factory, due to its own material properties, the polarizer 40' will shrink, forming a shrinkage stress F, which causes the polarizer 40' to separate from the protective adhesive layer 50'. Moreover, the shrinkage stress generated by the polarizer 40' causes cracks W to form in the second insulating layer 30' and the encapsulation layer 20' below the polarizer 40'. Moisture from the outside penetrates into the array layer 10' through the cracks in the second insulating layer 30' and the encapsulation layer 20', which will corrode the metal film layer in the array layer', affecting the performance reliability of the product and resulting in test failure.

[0045] To solve the above technical problems, in the display panel provided by the present disclosure, please refer to Figure 1 and Figure 3 , a second protective layer 60 is introduced on the side of the polarizer 40 away from the substrate 00. The second protective layer 60 covers the polarizer 40, that is, along the first direction D1, the orthographic projection of the second protective layer 60 on the substrate 00 covers the orthographic projection of the polarizer 40 on the substrate 00. In particular, along the first direction D1, the second protective layer 60 also overlaps at least part of the first protective layer 50, which is equivalent to the second protective layer 60 being further extended in the direction of the bonding area A11, covering at least part of the area of the first protective layer 50, that is, the second protective layer 60 is in direct contact with the first protective layer 50. Thus, during the reliability test, even when the polarizer 40 shrinks due to its own material properties, since the second protective layer 60 and the first protective layer 50 are in direct contact and pull each other, the second protective layer 60 does not shrink with the shrinkage of the polarizer 40, and the second protective layer 60 can still cover the area between the polarizer 40 and the first protective layer 50. For example, please refer to Figure 7 , the second protective layer 60 can isolate moisture and impurities from the outside. Even if cracks are generated in the second insulating layer 30 and the first insulating layer 20 due to the shrinkage stress of the polarizer 40, moisture and impurities from the outside will not be able to enter the above cracks through the second protective layer 60. Therefore, it is beneficial to improve the overall encapsulation reliability of the display panel, and further beneficial to improve the performance stability of the display panel. Among them, Figure 7 The figure shows a schematic diagram of a film layer of the display panel in the embodiment of the present disclosure after a reliability test.

[0046] It should be noted that Figure 3 the illustrated embodiment shows a scheme in which the second protective layer 60 completely covers the first protective layer 50, but the present disclosure is not limited thereto. In some other embodiments of the present disclosure, the second protective layer 60 may also cover at least part of the area of the first protective layer 50.

[0047] Optionally, the first protective layer 50 and the second protective layer 60 mentioned in the embodiment of the present disclosure are both adhesive layers. The first protective layer 50 may be, for example, transparent optical adhesive, and the second protective layer 60 may be, for example, UV-curable adhesive. Both are adhesive materials. When the two are in direct contact, a larger contact force will be generated, which is beneficial to resist the influence of the shrinkage stress of the polarizer 40. Even if the polarizer 40 shrinks, the relative position between the first protective layer 50 and the second protective layer 60 will not or hardly change.

[0048] Please continue to refer to Figure 2 and Figure 3 In an optional embodiment of the present disclosure, the substrate 00 is a rigid substrate. When the substrate 00 is a rigid substrate, it has strong stability. In the reliability test of the display panel, the rigid substrate 00 will not be affected by the shrinkage stress of the polarizer 40, thereby playing a reliable fixing role for the display function layer 10 above the substrate 00, and avoiding abnormal problems such as film breakage caused by the shrinkage of the polarizer 40 in the display function layer 10. Since the aforementioned second insulating layer 30 and the first insulating layer 20 are located between the polarizer 40 and the display function layer 10, considering the characteristics of the materials of the second insulating layer 30 and the first insulating layer 20 themselves, they may be affected by the shrinkage stress of the polarizer 40. However, since the second protective layer 60 located on the side of the polarizer 40 facing away from the substrate 00 is in direct contact with the first protective layer 50, the contact force between the two can resist the influence of the shrinkage stress of the polarizer 40. Therefore, even if the second insulating layer 30 or the first insulating layer 20 is cracked due to the shrinkage stress of the polarizer 40, the second protective layer 60 can still isolate water and oxygen, which is beneficial to ensure the performance stability of the display product.

[0049] Figure 8 FIG. 4 is a top view of the polarizer 40 and the first protective layer 50 provided in the embodiment of the present disclosure. Figure 8 In an optional embodiment of the present disclosure, the first protective layer 50 includes a main body 51 and a protruding portion 52 connected to the main body 51, and the protruding portion 52 is located on the side of the main body 51 facing the display area A0; the polarizer 40 includes a limiting groove 41, the limiting groove 41 is located at the end of the polarizer 40 facing the binding area A11, and the protruding portion 52 is located in the limiting groove 41.

[0050] and Figure 1Compared with the solution in the illustrated embodiment where the ends of the polarizer 40 and the first protective layer 50 are joined and flush, in this embodiment, a limiting groove 41 is introduced at the end of the polarizer 40 facing the bonding area A11. The limiting groove 41 can be regarded as a structure formed by recessing a partial area of the end face of the polarizer 40 facing the bonding area A11 along the direction pointing from the bonding area A11 to the display area A0. When forming the first protective layer 50, the first protective layer 50 will form a protruding portion 52 that fills the above-mentioned limiting groove 41. The protruding portion 52 is in direct contact with the limiting groove 41, and the protruding portion 52 exerts a pulling force on the polarizer 40 through the limiting groove 41. During the reliability test, this pulling force is beneficial to restraining the polarizer 40 from shrinking away from the bonding area A11. When the polarizer 40 does not shrink or the shrinkage range is small, its shrinkage stress will be small, and the influence of this shrinkage stress on the second insulating layer 30 and the first insulating layer 20 on the side of the polarizer 40 facing the substrate 00 will also be small, thereby facilitating the avoidance of the problem that the second insulating layer 30 and the first insulating layer 20 generate cracks due to the influence of a large shrinkage stress. Therefore, the solution of introducing the limiting groove 41 on the polarizer 40 and the protruding portion 52 on the first protective layer 50 is beneficial to further improving the packaging reliability of the display product, and further beneficial to enhancing the performance stability of the display product.

[0051] It should be noted that the inner contour shape of the limiting groove 41 on the polarizer 40 in the embodiment of the present disclosure matches the outer contour shape of the protruding portion 52 on the first protective layer 50.

[0052] Optionally, the first protective layer 50 is an ultraviolet curable adhesive. Before curing, the first protective layer 50 is in a flowing state, which is beneficial to filling the limiting groove 41 on the polarizer 40, and then ultraviolet curing is performed. In this way, it is beneficial to increase the contact area between the protruding portion 52 on the first protective layer 50 and the limiting groove 41 on the polarizer 40, thereby facilitating the improvement of the traction force between the two.

[0053] Figure 9 and Figure 10 are respectively partial schematic diagrams of the polarizer 40 provided by the embodiment of the present disclosure, specifically showing the structure of the limiting groove 41 on the polarizer 40. Please refer to Figure 1 、 Figure 8 、 Figure 9 and Figure 10 . In an alternative embodiment of the present disclosure, the limiting groove 41 includes a first part 411 and a second part 412 arranged along the second direction D2. The second part 412 is located between the first part 411 and the bonding area A11; along the third direction D3, the maximum width of the first part 411 is greater than the maximum width of the second part 412, and the third direction D3 is parallel to the plane where the substrate 00 is located and perpendicular to the second direction D2.

[0054] Figure 9The embodiment shown is described by taking the plane outline of the first portion 411 as an ellipse and the plane outline of the second portion 412 as a rectangle as an example. Figure 10 The illustrated embodiment is described by taking the planar outlines of the first portion 411 and the second portion 412 as an example, but the present disclosure is not limited thereto. Figure 9 and Figure 10 The first portion 411 and the second portion 412 in the limiting groove 41 are interconnected, and the second portion 412 is closer to the binding area A11 than the first portion 411. In this embodiment, the maximum width of the second portion 412 which is closer to the binding area is set to be smaller than the maximum width of the first portion 411 which is farther from the binding area A11. When the protrusion 52 of the first protective layer 50 is located in the limiting groove 41 of this shape, the protrusion 52 and the limiting groove 41 form a barb-like structure. When the display product is used in a reliability test or in an environment similar to a reliability test (such as a high temperature and high humidity environment), the traction force of the protrusion 52 on the limiting groove 41 will be greater, and the protrusion 52 will be less likely to detach from the limiting groove 41, which is more conducive to suppressing the shrinkage of the polarizer 40 and reducing the influence of the shrinkage stress on the second insulating layer 30 and the first insulating layer 20.

[0055] It should be noted that Figure 9 and Figure 10 The embodiment only illustrates the shapes of the first portion 411 and the second portion 412 of the limiting groove 41, but is not limited thereto. In some other embodiments of the present disclosure, the first portion 411 and the second portion 412 may also be in any other feasible shapes, provided that the maximum width of the first portion 411 is greater than the maximum width of the second portion 412. For example, when the plane contour of the first portion 411 is a circle or a rectangle, the plane contour of the second portion 412 may also be in a circle or an ellipse with a smaller diameter, or an inverted trapezoid with a smaller maximum width.

[0056] Please refer to Figure 10 In an optional embodiment of the present disclosure, in the limiting groove 41 of the polarizer 40, the orthographic projections of the first portion 411 and the second portion 412 on the plane where the substrate 00 is located are both rectangular; along the second direction D2, the depth of the first portion 411 is F, and the total depth of the limiting groove 41 is A, wherein F:A≥3:5.

[0057] When the first portion 411 and the second portion 412 in the limiting groove 41 of the polarizer 40 are both rectangular, it is helpful to simplify the manufacturing difficulty of the limiting groove 41 on the polarizer 40 and improve the production efficiency. Figure 10The shown elongated rectangular structure has the extension direction of its long side as the arrangement direction of different limiting grooves 41, and the extension direction of its short side as the arrangement direction of the display area A0 and the bonding area A11. The second part 412 can be embodied as a rectangular structure that is connected to the first part 411 and has a width smaller than the length of the long side of the first part 411. The first part 411 and the second part 412 as a whole are embodied as a T-shaped structure. In this embodiment, it is further defined that the relationship between the depth of the first part 411 along the second direction D2 and the total depth of the limiting groove 41 satisfies F:A≥3:5, so that in the entire limiting groove 41, the depth of the first part 411 accounts for a relatively large proportion, and the depth of the first part 411 is greater than the depth of the second part 412. In this way, when using the display panel in a reliability test or an environment similar to a reliability test, the mutual traction force between the protruding part 52 in the first protective layer 50 and the limiting groove 41 in the polarizer 40 is greater, which is more conducive to suppressing the inward shrinkage of the polarizer 40, and thus more conducive to reducing the influence of the inward shrinkage force of the polarizer 40 on the second insulating layer 30 and the first insulating layer 20, so as to ensure the packaging reliability of the first insulating layer 20 for the display panel.

[0058] Please continue to refer to Figure 8 , in an alternative embodiment of the present disclosure, the polarizer 40 includes a plurality of limiting grooves 41 arranged along the third direction D3. The third direction D3 is parallel to the plane where the substrate 00 is located and perpendicular to the second direction D2; along the third direction D3, the maximum width of a single limiting groove 41 is S1, and the minimum distance between the first edge B1 of the polarizer 40 and the limiting groove 41 adjacent to the first edge 91 is S0, S0≤S1, and the first edge 91 extends along the second direction D2.

[0059] In the embodiment of the present disclosure, when introducing a plurality of limiting grooves 41 that cooperate with the first protective layer 50 at the end of the polarizer 40, the more the number of the limiting grooves 41, the greater the mutual traction force between the limiting grooves 41 and the protruding part 52 on the first protective layer 50, and the more conducive to suppressing the inward shrinkage of the polarizer 40.

[0060] In this embodiment, the minimum distance between the limiting groove 41 adjacent to the first edge 91 of the polarizer 40 and the first edge 91 is described. This minimum distance S0 can be regarded as the distance between the first part 411 in the limiting groove 41 and the first edge 91. The maximum width S1 of a single limiting groove 41 can be regarded as the width of the first part 411 in the limiting groove 41 along the third direction D3. When this embodiment defines the relationship between the above-mentioned minimum distance and the maximum width as S0 ≤ S1, it is equivalent to that there is not enough space to set another limiting groove 41 between the first edge 91 of the polarizer 40 and the adjacent limiting groove 41 while ensuring an interval between adjacent limiting grooves 41. That is to say, the limiting groove 41 in the edge area is set as close as possible to the first edge 91 of the polarizer 40. In this way, it is beneficial to increase the traction force between the limiting groove 41 and the protruding part 52 that the edge area of the polarizer 40 can receive, thereby helping to avoid the phenomenon of inward shrinkage in the area of the polarizer 40 close to its first edge 91.

[0061] Optionally, multiple limiting grooves 41 are evenly arranged at the end of the polarizer 40 facing the bonding area A11, so that the traction force of the protruding part 52 on the edge of the polarizer 40 provided with the limiting grooves 41 is more uniform, avoiding the problem of local inward shrinkage in the area where there is no limiting groove 41 at the end of the polarizer 40 when the area is large. When multiple limiting grooves 41 are evenly arranged at the end of the polarizer 40 and the distance between the limiting groove 41 adjacent to the first edge 91 and the first edge 91 is less than the maximum width of the limiting groove 41, the overall end of the polarizer 40 facing the bonding area A11 can receive the traction of the protruding part 52 in the first protective layer 50 more evenly, which is beneficial to improving the overall force uniformity of the end of the polarizer 40 and helps to avoid the problem of local inward shrinkage.

[0062] Please continue to refer to Figure 8 and Figure 10, in an alternative embodiment of the present disclosure, the limiting portion includes a plurality of limiting grooves 41 arranged along the third direction D3. The third direction D3 is parallel to the plane where the substrate 00 is located and perpendicular to the second direction D2. Along the second direction D2, the depth of the limiting groove 41 is A. Along the third direction D3, the minimum interval width between two adjacent limiting grooves 41 is E. The limiting groove 41 includes a first opening 91, and the first opening 91 is located on the side wall of the polarizer 40 facing the bonding area A11. Along the third direction D3, the width of the first opening 91 is C. Among them, A = E = C. It should be noted that the minimum interval width E between adjacent limiting grooves 41 mentioned in this embodiment refers to the interval width between two first parts 411 in adjacent limiting grooves 41. The first opening 91 of the limiting groove 41 refers to the opening of the limiting groove 41 facing the bonding area A11. In this embodiment, the depth A of the limiting groove 41, the minimum interval width E between adjacent limiting grooves 41, and the width C of the first opening 91 are designed with equal dimensions, so that the traction forces received by the area of the polarizer 40 provided with the limiting grooves 41 and the area between adjacent limiting grooves 41 are as consistent as possible, so as to avoid the problem of local shrinkage caused by uneven local stress at the end of the polarizer 40. Optionally, in this embodiment, the limiting grooves 41 provided at the end of the polarizer 40 are arranged at equal distances at the end of the polarizer 40, and the minimum interval between the limiting groove 41 adjacent to the first edge 91 of the polarizer 40 and the first edge 91 is less than the interval of the limiting grooves 41, so that it is more beneficial to improve the stress uniformity of different regions at the end of the polarizer 40.

[0063] Please continue to refer to Figure 8 and Figure 10 , in an alternative embodiment of the present disclosure, the limiting groove 41 further includes a first groove bottom 92 disposed opposite to the first opening 91 along the second direction D2. Along the third direction D3, the minimum distance between the edge of the first groove bottom 92 and the edge of the first opening 91 is B, and the width of the first opening 91 is C. Among them, B = C.

[0064] In the present disclosure, along the third direction D3, the width of the first part 411 of the limiting groove 41 is greater than the width of the second part 412. Optionally, the center lines of the first part 411 and the second part 412 along the second direction D2 coincide. In this embodiment, the minimum distance between the edge of the first groove bottom 92 and the edge of the first opening 91 is B, which can be regarded as the width of the part where the first part 411 extends beyond the first opening 91 on the same side of the first opening 91 along the third direction D3. In this embodiment, this width is set to be equal to the width C of the first opening 91. In this way, after the protruding part 52 of the first protective layer 50 is matched with the limiting groove 41 of the polarizer 40, it is beneficial to balance the traction uniformity of the area provided with the first part 411 and the area provided with the second part 412, thereby being beneficial to improving the stress consistency of different regions on the polarizer 40.

[0065] Please continue to refer to Figure 8 , in an alternative embodiment of the present disclosure, the limiting groove 41 includes a first opening 91 located on the side wall of the polarizer 40 facing the bonding area A11, and the limiting groove 41 further includes a first groove bottom 92 disposed opposite to the first opening 91 along the second direction D2; along the second direction D2, the distance between the first groove bottom 92 and the display area A0 is D01, and D01≥0.5 mm. That is to say, when the limiting groove 41 is introduced into the polarizer 40, there is at least a 0.5 mm interval between the limiting groove 41 and the display area A0. This is beneficial to avoiding the influence of the introduction of the limiting groove 41 on the large-angle light emission in the display area A0 and is conducive to ensuring the display effect after the limiting groove 41 is introduced into the polarizer 40.

[0066] Optionally, the distance between the end face of the polarizer 40 facing the bonding area A11 and the bonding area A11 is D02, and D02≥0.2 mm. That is to say, there is at least a 0.2 mm interval between the polarizer 40 and the bonding area A11. When the limiting groove 41 is introduced into the polarizer 40, it refers to the distance between the end face where the first opening 91 of the limiting groove 41 is located and the bonding area A11 being D02. Such a setting makes there be a certain distance between the polarizer 40 and the first bonding area A11, reserving a certain range of sticking deviation to avoid the interference of the stuck polarizer 40 on the bonding area A11.

[0067] Figure 11 Another top view of the display panel provided by the embodiment of the present disclosure is shown Figure 12 As shown Figure 11 a CC-direction cross-sectional view of the display panel in Figure 11 and Figure 12 , in an alternative implementation manner of the present disclosure, the display panel further includes an elastic cushion block 80 located in the first non-display area A1. The elastic cushion block 80 extends along the third direction D3, and the third direction D3 is parallel to the plane where the substrate 00 is located and perpendicular to the second direction D2; in the first non-display area A1, the elastic cushion block 80 is located between the first insulating layer 20 and the second insulating layer 30; the second insulating layer 30 includes a convex portion 31. Along the first direction D1, the convex portion 31 overlaps with the elastic cushion block 80, and the distance between the convex portion 31 and the substrate 00 is greater than the distance between the second insulating layer 30 and the substrate 00 in the display area A0.

[0068] Please refer to Figure 11 and Figure 12, this embodiment shows a solution of introducing an elastic cushion block 80 between the second insulating layer 30 and the first insulating layer 20 in the first non-display area A1. The elastic cushion block 80 has a certain elasticity. The second insulating layer 30 covers the side of the elastic cushion block 80 away from the substrate 00, and a convex portion 31 is formed at the position corresponding to the elastic cushion block 80. The side of the convex portion 31 facing the substrate 00 is supported by the aforementioned elastic cushion block 80, so that the distance between the surface of the convex portion 31 away from the substrate 00 and the substrate 00 is greater than the distance between the surface of the second insulating layer 30 away from the substrate 00 and the substrate 00 in the display area A0. When using the display panel in a reliability test or in an environment similar to a reliability test, when the polarizer 40 shrinks, affected by the shrinkage stress of the polarizer 40, the second insulating layer 30 will shrink in the direction of the display area A0. At this time, since the elastic cushion block 80 is introduced between the second insulating layer 30 and the first insulating layer 20, the elastic cushion block 80 will be stretched under the shrinkage action of the second insulating layer 30, and the convex portion 31 of the second insulating layer 30 will also be stretched, forming a structure such as Figure 13 shown. Since the elastic cushion block 80 is introduced, it is equivalent to reserving a certain displacement amount for the shrinkage of the second insulating layer 30, which is beneficial to avoiding the problem that the second insulating layer 30 generates cracks due to the shrinkage stress of the polarizer 40. Figure 13 The figure shows a schematic diagram of a film layer of the display panel when the polarizer 40 shrinks inward. At this time, even if the first insulating layer 20 generates cracks due to the shrinkage stress of the polarizer 40, since there are no cracks in the second insulating layer 30 provided above it, it can prevent external water, oxygen or impurities from entering the display function layer 10 through the cracks of the first insulating layer 20. In addition, in this embodiment, a second protective layer 60 is provided on the side of the polarizer 40 away from the substrate 00. While covering the polarizer 40, the second protective layer 60 is also in direct contact with the first protective layer 50 in the first non-display area A1. Even if the polarizer 40 shrinks inward, the first protective layer 50 and the second protective layer 60 can still be reliably combined, and the first protective layer 50 can also isolate external water vapor and impurities for the display panel. Therefore, the double functions of the first protective layer 50 and the second insulating layer 30 effectively avoid the influence of external water vapor and impurities on the display panel, which is beneficial to improving the overall packaging reliability of the display panel, and further beneficial to improving the performance reliability of the display panel.

[0069] Please refer to Figure 12 , in an alternative embodiment of the present disclosure, the shape of the first cross-section of the elastic cushion block 80 is arc-shaped or trapezoidal, and the first cross-section is perpendicular to the plane where the substrate 00 is located and parallel to the second direction D2. Figure 12The illustrated embodiment is described only by taking the trapezoidal cross-section of the elastic cushion block 80 as an example, but the present disclosure is not limited thereto. In some other embodiments of the present disclosure, the cross-section of the elastic cushion block 80 may also be formed into other feasible structures such as an arc, for example, any other feasible structure with a narrower upper part and a wider lower part.

[0070] Please refer to Figure 12 and Figure 13 , in an alternative embodiment of the present disclosure, the elastic cushion block 80 includes an initial state and a stretched state. In the initial state, the height of the elastic cushion block 80 is greater than the height of the elastic cushion block 80 in the stretched state. Figure 12 It can be embodied as the initial state, that is, the state where the polarizer 40 has not shrunk. Figure 13 It is embodied as the stretched state, that is, the state where the polarizer 40 has shrunk. Among them, in the initial state, the maximum width of the first cross-section of the elastic cushion block 80 along the second direction D2 is L0, and L0≥0.1 mm. Considering that during the reliability test or when using the display panel in an environment similar to the reliability test, the amount of shrinkage of the polarizer 40 in the display panel is usually less than 0.1 mm. Therefore, when the maximum width of the elastic cushion block 80 in the initial state is set to be greater than or equal to 0.1 mm, sufficient stretching space can be reserved for the second insulating layer 30 when it is stretched by the shrinkage stress of the polarizer 40 without generating cracks, which is beneficial to ensuring the covering reliability of the second insulating layer 30 on the first insulating layer 20, and further beneficial to improving the overall packaging reliability of the display panel.

[0071] Optionally, please refer to Figure 13 , in the initial state, the height of the first cross-section of the elastic cushion block 80 along the first direction D1 is L1, and L1≥0.05 mm. The height of the elastic cushion block 80 will also affect its stretching amount. In the embodiment of the present disclosure, when the height of the elastic cushion block 80 is set to be greater than or 0.05 mm, it is beneficial to meet the stretching amount requirement of the second insulating layer 30 when the polarizer 40 shrinks.

[0072] Please continue to refer to Figure 12 , in an alternative embodiment of the present disclosure, along the second direction D2, the elastic cushion block 80 is located between the polarizer 40 and the bonding area A11; in the initial state, the minimum distance between the elastic cushion block 80 and the polarizer 40 is L2, and the minimum distance between the elastic cushion block 80 and the bonding area A11 is L3, L2≥0.2 mm, L3≥0.2 mm.

[0073] When an elastic cushion block 80 is introduced between the second insulating layer 30 and the first insulating layer 20 in the first non-display area A1, the elastic cushion block 80 needs to be spaced apart from both the display area A0 and the bonding area A11 by a certain distance. Considering that the shrinkage amount of the polarizer 40 during shrinkage is about less than 0.1 mm, even when the elastic cushion block 80 is stretched due to the shrinkage stress of the polarizer 40, its stretching amount will also be less than 0.1 mm. Therefore, when the spacing distance between the elastic cushion block 80 and the display area A0, and the spacing distance between the elastic cushion block 80 and the bonding area A11 are both set to be greater than or equal to 0.2 mm, even after the elastic cushion block 80 is stretched, there will still be a certain spacing space between the elastic cushion block 80 and the display area A0 and the bonding area A11, thus avoiding the elastic cushion block 80 from affecting the display area A0 and the bonding area A11, which is beneficial to ensuring the performance stability of the display panel when the elastic cushion block 80 is introduced.

[0074] The above embodiment shows an example of introducing one elastic cushion block 80 in the first non-display area A1 for illustration. In some other embodiments of the present disclosure, if the space in the first non-display area A1 is sufficient, two or more elastic cushion blocks 80 can also be introduced in the first non-display area A1. For example, please refer to Figure 14 , Figure 14 which shows another top view of the display panel provided by the embodiment of the present disclosure. In an alternative embodiment of the present disclosure, the display panel includes at least two elastic cushion blocks 80 arranged along the second direction D2. In the initial state, the distance between adjacent elastic cushion blocks 80 along the second direction D2 is L4, and L4 ≥ 0.1 mm.

[0075] It should be noted that when two elastic cushion blocks 80 are introduced in the first non-display area A1, the shape structure, size of the two elastic cushion blocks 80, and the distances from the display area A0 and the bonding area A11 can all refer to Figure 10 and Figure 11 the embodiments shown. The present disclosure will not elaborate on this again. In the first non-display area A1, the second insulating layer 30 covers the two elastic cushion blocks 80 to form two convex portions 31.

[0076] When two elastic cushion blocks 80 are introduced in the first non-display area A1, the second insulating layer 30 correspondingly forms two convex portions 31. When the polarizer 40 shrinks, both of the two elastic cushion blocks 80 can be stretched under the influence of the tensile stress of the second insulating layer 30. The two elastic cushion blocks 80 provide twice the tensile reserve amount for the second insulating layer 30, thus being more beneficial to avoiding the problem that the second insulating layer 30 generates cracks under the influence of the shrinkage stress of the polarizer 40.

[0077] Please continue to refer to Figure 12, in an alternative embodiment of the present disclosure, in the initial state, the height of the first cross-section of the elastic cushion block 80 along the first direction D1 is L1, and L1≥0.05 mm. The height of the elastic cushion block 80 also affects its stretching amount. When the height of the elastic cushion block 80 is set to be greater than or equal to 0.05 mm in the embodiment of the present disclosure, it is beneficial to meet the stretching amount requirement of the second insulating layer 30 when the polarizer 40 shrinks.

[0078] Figure 15 The following shows another plan view of the display panel provided by the embodiment of the present disclosure. When the elastic cushion block 80 is introduced into the first non-display area A1, a limiting groove 41 can also be provided at the end of the polarizer 40 facing the bonding area A11, and the protruding portion 52 in the first protective layer 50 can also be embedded in the limiting groove 41. The contraction of the polarizer 40 is restricted by the mutual traction force between the limiting groove 41 and the protruding portion 52. At the same time, the introduction of the elastic cushion block 80 plays an auxiliary role to avoid cracks in the second insulating layer 30 caused by the influence of the contraction stress when the polarizer 40 shrinks, thereby being more beneficial to improving the packaging reliability of the display panel.

[0079] Figure 16 The following shows another top view structure diagram of the display panel provided by the embodiment of the present disclosure. Figure 17 The following shows Figure 16 A DD-direction cross-sectional view of the display panel in the embodiment. Please refer to Figure 16 and Figure 17 , in an alternative embodiment of the present disclosure, the display panel further includes at least one cutout C0 located in the first non-display area A1. Along the first direction D1, the cutout C0 at least penetrates through the polarizer 40 and the second insulating layer 30; the first protective layer 50 includes a main body portion 51 and an extension portion 53 connected to the main body portion 51, and the extension portion 53 is at least located in the cutout C0.

[0080] Please refer to Figure 16 and Figure 17, this embodiment shows a solution of introducing a connected groove C0 on at least the polarizer 40 and the second insulating layer 30 in the first non-display area A1. When forming the first protective layer 50 in the first non-display area A1, the groove C0 penetrates at least the polarizer 40 and the second insulating layer 30. In a top view structure, the grooves C0 can be uniformly arranged in the first non-display area A1. In this embodiment, it can be set that the surface of the first protective layer 50 facing away from the substrate 00 is higher than the surface of the polarizer 40 facing away from the substrate 00, so that at least a part of the extending portion 53 in the first protective layer 50 fills into the above-mentioned groove C0. In this way, the main body portion 51 of the first protective layer 50 and the extending portion 53 located in the groove C0 together form a hook shape. When the polarizer 40 shrinks inward, the hook-shaped first protective layer 50 will generate a pulling force on the polarizer 40 and the second insulating layer 30, thereby inhibiting the inward shrinkage of the polarizer 40, and thus is beneficial to avoiding the problem that the second insulating layer 30 generates cracks due to the inward shrinkage stress of the polarizer 40. Therefore, it is also beneficial to improve the packaging reliability of the display panel.

[0081] It should be noted that Figure 17 The illustrated embodiment shows a solution where the groove C0 penetrates the polarizer 40 and the second insulating layer 30. In some other embodiments of the present disclosure, the groove C0 may further penetrate at least a part of the first insulating layer 20. For example, please refer to Figure 18 , Figure 18 As shown in Figure 16 Another DD-direction cross-sectional view of the display panel in the embodiment. When the groove C0 penetrates the polarizer 40, the second insulating layer 30, and at least a part of the first insulating layer 20, the depth of the groove C0 increases, and the coverage area of the first protective layer 50 in the groove C0 increases. Therefore, it is more beneficial to improve the overall pulling force of the first protective layer 50 on the polarizer 40, and thus more beneficial to inhibit the inward shrinkage of the polarizer 40.

[0082] Please continue to refer to Figure 17 , in an alternative embodiment of the present disclosure, the first protective layer 50 further includes a connecting portion 54 connecting the main body portion 51 and the extending portion 53, and at least a part of the connecting portion 54 is located on the side of the polarizer 40 facing away from the substrate 00; along the first direction D1, the second protective layer 60 covers the first protective layer 50.

[0083] In this embodiment, in addition to covering the bonding area A11, the first protective layer 50 further extends in the first non-display area A1 in the direction towards the display area A0 on the side of the polarizer 40 away from the substrate 00, and fills into the aforementioned groove C0. The connecting portion 54 mentioned in this embodiment for connecting the main body portion 51 and the extending portion 53 refers to the portion of the first protective layer 50 on the surface of the polarizer 40 away from the substrate 00. The hook shape formed by the main body portion 51, the connecting portion 54, and the extending portion 53 in the first protective layer 50 plays a role in pulling the polarizer 40 when it contracts, so it is beneficial to inhibit the contraction of the polarizer 40, and further beneficial to avoid the problem that the second insulating layer 30 and the first insulating layer 20 generate cracks due to the contraction stress of the polarizer 40.

[0084] In this embodiment, it is further defined that the second protective layer 60 covers the first protective layer 50, which means that the surface of the first protective layer 50 away from the substrate 00 is covered by the second protective layer 60. The second protective layer 60 is in direct contact with the first protective layer 50 to form a contact force. When the polarizer 40 contracts, the contact stress between the first protective layer 50 and the second protective layer 60 can also reduce the contraction of the polarizer 40 to a certain extent. At the same time, the way that the second protective layer 60 completely covers the polarizer 40 and the surface of the second protective layer 60 away from the substrate 00 is also beneficial to improving the overall packaging reliability of the display panel and avoiding the influence of external water, oxygen, and impurities on the display panel.

[0085] Figure 19 The figure shows another top view structure diagram of the display panel provided by the embodiment of the present disclosure. In an alternative embodiment of the present disclosure, the polarizer 40 includes a limiting groove 41, and the limiting groove 41 is located at the end of the polarizer 40 facing the bonding area A11; the first protective layer 50 further includes a protruding portion 52 connected to the main body portion 51, the protruding portion 52 is located on the side of the main body portion 51 facing the display area A0, and the protruding portion 52 is located in the limiting groove 41; along the first direction D1, the groove C0 overlaps with at least a part of the limiting groove 41.

[0086] This embodiment shows a solution where the groove C0 introduced in the first non-display area A1 includes the limiting groove 41 on the polarizer 40. The groove C0 penetrates at least the polarizer 40 and the second insulating layer 30. For the part penetrating the polarizer 40, it can be embodied as the limiting groove 41 on the polarizer 40, and the shape of the groove C0 on the polarizer 40 is adapted to the shape of the limiting groove 41. The shape of the groove C0 penetrating the second insulating layer 30 can be the same as or different from the shape of the limiting groove 41 on the polarizer 40, as long as it is ensured that the groove C0 on the polarizer and the groove C0 on the second insulating layer 30 are connected. When the limiting groove 41 on the polarizer 40 is used as the groove C0 penetrating the polarizer 40, the limiting groove 41 is embodied as a structure with a narrower upper part and a wider lower part, that is, the width of the part near the bonding area A11 is smaller, and the width of the part far from the bonding area A11 is larger. When the first protective layer 50 is filled in the limiting groove 41, the first protective layer 50 located in the limiting groove 41 forms a structure similar to barbs, and at the same time, the first protective layer 50 as a whole forms a shape similar to a barb. The combination of these two structures is more conducive to enhancing the traction force between the first protective layer 50 and the polarizer 40, thereby being conducive to further suppressing the shrinkage of the polarizer 40.

[0087] Figure 17 and Figure 18 The embodiment shows a solution where when the groove C0 penetrates the polarizer 40 and the second insulating layer 30, or penetrates the polarizer 40, the second insulating layer 30 and the first insulating layer 20, the parts of the groove C0 located in different film layers are designed with the same inner diameter. In this way, the groove C0 structures on different film layers can be formed using the same size standard. However, the present disclosure is not limited thereto. In some other embodiments of the present disclosure, the inner diameters of the groove C0 in different film layers can also be set differently.

[0088] For example, please refer to Figure 20 , Figure 20 as shown in Figure 19 is an EE-direction cross-sectional view of a display panel in an embodiment. In an alternative embodiment of the present disclosure, the groove C0 includes a first groove C1 penetrating the polarizer 40 and a second groove C2 penetrating the second insulating layer 30. The first groove C1 and the second groove C2 are connected, and the inner diameter of the second groove C2 is smaller than the inner diameter of the first groove C1.

[0089] Figure 20The illustrated embodiment shows that the inner diameter of the first cut groove C1 in the polarizer 40 is larger than the inner diameter of the second cut groove C2 in the second insulating layer 30, such that the first protective layer 50 in the cut groove C0 can contact both the inner walls of the respective cut grooves C0 and the surface of the second insulating layer 30 on the side facing away from the substrate 00. That is, the first protective layer 50 can contact the longitudinal side walls of the first cut groove C1 in the polarizer 40 and the second cut groove C2 in the second insulating layer 30, and also contact the horizontal plane of the second insulating layer 30, which is beneficial to increasing the contact area and enhancing the bonding reliability between the first protective layer 50 and the polarizer 40 and the second insulating layer 30. Therefore, it is beneficial to increase the traction force of the first protective layer 50 on the polarizer 40 and the second insulating layer 30 when the polarizer 40 shrinks, which is more beneficial to suppressing the shrinkage of the polarizer 40, and further suppressing the shrinkage of the second insulating layer 30 caused by the shrinkage of the polarizer 40. Thus, it is beneficial to avoid the crack problem of the second insulating layer 30 caused by the inward contraction force of the polarizer 40.

[0090] Figure 21 Shown as Figure 19 Another EE-direction cross-sectional view of the display panel in the embodiment is shown. Please refer to Figure 21 , in an alternative embodiment of the present disclosure, the cut groove C0 further includes a third cut groove C3 located in the first insulating layer 20. The third cut groove C3 communicates with the second cut groove C2, and the inner diameter of the third cut groove C3 is smaller than the inner diameter of the first cut groove C1. Optionally, the third cut groove C3 does not penetrate the first insulating layer 20. For example, it may only penetrate one or two encapsulation layers in the first insulating layer 20. In this embodiment, only the case where the third cut groove C3 penetrates one film layer in the first insulating layer 20 is taken as an example for illustration to ensure that the first insulating layer 20 can still effectively encapsulate the underlying display functional layer 10.

[0091] This embodiment shows a solution where the trench C0 penetrates through the polarizer 40, the second insulating layer 30, and a part of the first insulating layer 20 respectively. At this time, the part of the trench C0 located in the polarizer 40 is the first trench C1, the part located in the second insulating layer 30 is the second trench C2, and the part located in the first insulating layer 20 is the third trench C3. The inner diameters of the first trench C1, the second trench C2, and the third trench C3 show a decreasing trend. The first protective layer 50 in the trench C0 not only contacts the longitudinal inner walls of the first trench C1, the second trench C2, and the third trench C3 respectively, but also contacts the surface of the second insulating layer 30 facing away from the substrate 00, and at the same time contacts the surface of the first insulating layer 20 facing away from the substrate 00. This design method is beneficial to increasing the contact area between the trench C0 and the three second insulating layers 30, contacting both the longitudinal surface and the horizontal surface, thus being beneficial to the contact reliability of the first protective layer 50 in the trench C0, and more beneficial to increasing the traction force of the first protective layer 50 on the polarizer 40, the second insulating layer 30, and the first insulating layer 20 when the polarizer 40 shrinks, which is beneficial to suppressing the shrinkage of the polarizer 40, and further suppressing the shrinkage of the second insulating layer 30 and the first insulating layer 20 caused by the shrinkage of the polarizer 40. Therefore, it is beneficial to avoid the crack problem of the second insulating layer 30 and the first insulating layer 20 caused by the inward contraction force of the polarizer 40.

[0092] Optionally, considering that the display functional layer 10 includes signal lines and transistors disposed in the first non-display area A1, when forming the trench C0 in the first non-display area A1, the foregoing signal lines and transistors can be avoided. That is, along the first direction D1, the trench C0 does not overlap with the signal lines and transistors, which is beneficial to the fabrication of the trench C0 and ensures that the trench C0 can contact the first protective layer 50 well.

[0093] Based on the same inventive concept, the present disclosure also provides a display device. Figure 22 Shown is a schematic structural diagram of the display device provided by the embodiment of the present disclosure. Please refer to Figure 22 The display device 200 includes the display panel 100 in any of the above embodiments. The display device 200 provided by the embodiment of the present disclosure can be any electronic device with a display function, such as a tablet computer with a display function, a display product in a display cabinet, a television, or a vehicle-mounted display device. The display device 200 provided by the embodiment of the present disclosure has the beneficial effects of the display panel 100 provided by the embodiment of the present disclosure. For specific descriptions of the display panel 100, reference can be made to the above embodiments, and details are not described herein again.

[0094] It can be understood that Figure 22 Only a rectangular structure is used to illustrate the display device. In some other embodiments of the present disclosure, the display device 200 can also be embodied as a circular shape, an oval shape, or any other feasible shape, and the present disclosure does not specifically limit this.

[0095] In summary, the display panel and the display device provided by the embodiments of the present disclosure at least have the following technical effects:

[0096] In the display panel and the display device provided by the present disclosure, a second protective layer is introduced on the side of the polarizer facing away from the substrate, and the second protective layer covers the polarizer. That is to say, along the first direction, the orthographic projection of the second protective layer on the substrate covers the orthographic projection of the polarizer on the substrate. In particular, along the first direction, the second protective layer also overlaps at least part of the first protective layer, which is equivalent to that the second protective layer extends further in the direction of the bonding area and covers at least part of the area of the first protective layer, that is, the second protective layer is in direct contact with the first protective layer. In this way, during the reliability test, even if the polarizer shrinks due to its own material properties, since the second protective layer and the first protective layer are in direct contact and pull each other, the second protective layer does not shrink with the shrinkage of the polarizer, and the second protective layer can still cover the area between the polarizer and the first protective layer. The second protective layer can isolate external moisture and impurities. Even if cracks are generated in the second insulating layer and the first insulating layer due to the shrinkage stress of the polarizer, external moisture and impurities will not be able to enter the above cracks through the second protective layer, which is beneficial to improving the overall packaging reliability of the display product and further beneficial to improving the performance stability of the display product.

[0097] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including the element.

[0098] The above are only specific embodiments of the present disclosure, which enable those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that: The device comprises a substrate, and a display function layer, a first insulating layer, a second insulating layer and a polarizer arranged on the same side of the substrate, wherein along a first direction, the first insulating layer is located on a side of the display function layer away from the substrate, the second insulating layer is located on a side of the first insulating layer away from the substrate, and the polarizer is located on a side of the second insulating layer away from the substrate, and the first direction is perpendicular to the plane where the substrate is located; The display panel comprises a display area and a first non-display area located at one side of the display area along a second direction, the first non-display area comprising a binding area; the polarizer is located in the display area and at least a portion of the first non-display area, the second insulating layer and the first insulating layer are located in the display area and at least a portion of the first non-display area, and along the first direction, the polarizer, the second insulating layer and the first insulating layer do not overlap with the binding area; The display panel also includes a first protective layer and a second protective layer, the first protective layer is located in the first non-display area, along the first direction, the first protective layer is at least located on the side of the second insulating layer away from the substrate, and overlaps with the second insulating layer, the first insulating layer and the binding area; the second protective layer is located on the side of the polarizer away from the substrate and covers the polarizer, along the first direction, the second protective layer overlaps with at least part of the first protective layer.

2. The display panel according to claim 1, characterized in that: The substrate is a rigid substrate.

3. The display panel according to claim 1, characterized in that: The first protective layer includes a main body and a protruding portion connected to the main body, wherein the protruding portion is located on a side of the main body facing the display area; The polarizer comprises a limiting groove, the limiting groove is located at the end of the polarizer facing the binding area, and the protrusion is located in the limiting groove.

4. The display panel according to claim 3, characterized in that: The limiting groove includes a first part and a second part arranged along the second direction, and the second part is located between the first part and the binding area; along the third direction, the maximum width of the first part is greater than the maximum width of the second part, and the third direction is parallel to the plane where the substrate is located and perpendicular to the second direction.

5. The display panel according to claim 4, characterized in that: The orthographic projections of the first portion and the second portion on the plane where the substrate is located are both rectangular; along the second direction, the depth of the first portion is F, and the total depth of the limiting groove is A, wherein F:A≥3:

5.

6. The display panel according to claim 3, characterized in that: The polarizer includes a plurality of the limiting grooves arranged along a third direction, wherein the third direction is parallel to the plane where the substrate is located and perpendicular to the second direction; Along the third direction, the maximum width of a single limiting groove is S1, the minimum distance between the first edge of the polarizer and the limiting groove adjacent to the first edge is S0, S0≤S1, and the first edge extends along the second direction.

7. The display panel according to claim 3, characterized in that: The limiting portion includes a plurality of limiting grooves arranged along a third direction, wherein the third direction is parallel to the plane where the substrate is located and perpendicular to the second direction; Along the second direction, the depth of the limit groove is A; along the third direction, the minimum spacing width between two adjacent limit grooves is E; the limit groove includes a first opening, and the first opening is located on the side wall of the polarizer facing the binding area, and along the third direction, the width of the first opening is C; wherein, A=E=C.

8. The display panel according to claim 7, characterized in that: The limiting groove further includes a first groove bottom arranged opposite to the first opening along the second direction; along the third direction, a minimum distance between an edge of the first groove bottom and an edge of the first opening is B, where B=C.

9. The display panel according to claim 1, characterized in that: The display panel further includes an elastic pad located in the first non-display area, the elastic pad extending along a third direction, the third direction being parallel to the plane where the substrate is located and perpendicular to the second direction; In the first non-display area, the elastic pad is located between the first insulating layer and the second insulating layer; the second insulating layer includes a protrusion, and along the first direction, the protrusion overlaps with the elastic pad, and the distance between the protrusion and the substrate is greater than the distance between the second insulating layer and the substrate in the display area.

10. The display panel according to claim 9, characterized in that: The first cross-section of the elastic pad is in an arc shape or a trapezoidal shape, and the first cross-section is perpendicular to the plane where the substrate is located and parallel to the second direction.

11. The display panel according to claim 10, characterized in that: The elastic pad includes an initial state and a stretched state. In the initial state, the height of the elastic pad is greater than the height of the elastic pad in the stretched state. In the initial state, the maximum width of the first cross-section of the elastic pad along the second direction is L0, and L0≥0.1mm.

12. The display panel according to claim 11, characterized in that: Along the second direction, the elastic pad is located between the polarizer and the binding area; in the initial state, the minimum distance between the elastic pad and the polarizer is L2, and the minimum distance between the elastic pad and the binding area is L3, L2≥0.2mm, L3≥0.2mm.

13. The display panel according to claim 11, characterized in that: The display panel includes at least two elastic pads arranged along the second direction. In the initial state, a distance between adjacent elastic pads along the second direction is L4, and L4≥0.1 mm.

14. The display panel according to claim 11, characterized in that: In the initial state, a height of the first cross section of the elastic pad along the first direction is L1, and L1 ≥ 0.05 mm.

15. The display panel according to claim 1, characterized in that: It also includes at least one groove located in the first non-display area, and along the first direction, the groove at least penetrates the polarizer and the second insulating layer; the first protective layer includes a main body and an extension part connected to the main body, and the extension part is at least located in the groove.

16. The display panel according to claim 15, characterized in that: The first protective layer also includes a connecting portion connecting the main portion and the extending portion, and at least a portion of the connecting portion is located on a side of the polarizer away from the substrate; along the first direction, the second protective layer covers the first protective layer.

17. The display panel according to claim 15, characterized in that: The polarizer includes a limiting groove, and the limiting groove is located at the end of the polarizer facing the binding area; the first protective layer also includes a protruding portion connected to the main body, and the protruding portion is located on a side of the main body facing the display area, and the protruding portion is located in the limiting groove; Along the first direction, the trench overlaps with at least a portion of the limiting groove.

18. The display panel according to claim 15, characterized in that: The grooves include a first groove penetrating the polarizer and a second groove penetrating the second insulating layer, the first groove is connected to the second groove, and the inner diameter of the second groove is smaller than the inner diameter of the first groove.

19. The display panel according to claim 18, characterized in that: The trench further includes a third trench located in the first insulating layer, the third trench is connected to the second trench, and an inner diameter of the third trench is smaller than an inner diameter of the first trench.

20. A display device, characterized in that: The display panel comprises any one of claims 1 to 19.

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