Display panel and display device

Abstract

The present application provides a display panel and a display device; the display panel includes a base substrate, a first insulating layer and an alignment mark provided on the first insulating layer, the alignment mark is provided on a side of the first insulating layer away from the base substrate, the alignment mark includes a first sub-portion and a second sub-portion provided on a side of the first sub-portion away from the base substrate, the orthographic projection of the second sub-portion on the first sub-portion is located within the first sub-portion, and the adhesion between the first sub-portion and the first insulating layer is greater than the adhesion between the second sub-portion and the first insulating layer; the present application improves the adhesion between the alignment mark and the inorganic layer by using the first sub-portion with greater adhesion to the inorganic layer as the bottom of the alignment mark and the second sub-portion with less adhesion to the inorganic layer as the top of the alignment mark, thereby avoiding the technical problem of peeling between the alignment mark and the inorganic layer and improving the alignment accuracy of the product.

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] Organic Light-Emitting Diode (OLED) is a new type of current-type semiconductor light-emitting device that displays light by controlling the carriers of the device and stimulating organic materials.

[0003] In current OLED display panels, since inkjet printing or other alignment processes are required, alignment marks need to be set on the array side of the display panel to identify the preset position of the display panel; existing alignment marks are usually composed of at least one layer of organic material stacked on an inorganic material, and the adhesion between the inorganic material and the organic material is relatively low, which causes a technical problem of peeling between the alignment mark and the inorganic material, resulting in poor alignment accuracy and thus abnormal display panel preparation. Summary of the Invention

[0004] The present application provides a display panel and a display device to improve the technical problems of alignment marks and easy peeling in existing display panels.

[0005] To solve the above problem, the technical solution provided by this application is as follows:

[0006] The present application proposes a display panel, which includes:

[0007] substrate;

[0008] A first insulating layer is provided on one side of the base substrate;

[0009] At least two alignment marks, located on a periphery of the display panel, the alignment marks being provided on a side of the first insulating layer away from the base substrate, the alignment marks comprising a first sub-portion and a second sub-portion provided on a side of the first sub-portion away from the base substrate, the orthographic projection of the second sub-portion on the first sub-portion being located within the first sub-portion;

[0010] The adhesion between the first sub-section and the first insulating layer is greater than the adhesion between the second sub-section and the first insulating layer.

[0011] Optionally, the display panel further includes:

[0012] A first pixel definition layer is provided on a side of the first insulating layer away from the base substrate;

[0013] a second pixel definition layer, disposed on a surface of the first pixel definition layer away from the base substrate;

[0014] The second sub-portion is made of the same material as the first pixel definition layer or the second pixel definition layer.

[0015] Optionally, the area of ​​the second sub-section is smaller than the area of ​​the first sub-section.

[0016] Optionally, the length and width of the first sub-portion range from 48 μm to 52 μm, and the width and length of the second sub-portion range from 18 μm to 22 μm.

[0017] Optionally, the alignment mark further includes:

[0018] a third sub-section, provided on a side of the first sub-section away from the first insulating layer;

[0019] The third sub-section covers the first sub-section, and the second sub-section is provided on a surface of the third sub-section away from the first sub-section;

[0020] Alternatively, a groove is formed on the third sub-portion, the second sub-portion is located in the groove, and the second sub-portion contacts the first sub-portion in the groove.

[0021] Optionally, the second sub-portion is made of the same material as the second pixel definition layer, the third sub-portion is made of the same material as the first pixel definition layer, and an outer contour of the first sub-portion is indented relative to an outer contour of the third sub-portion.

[0022] Optionally, the display panel includes:

[0023] A first source-drain electrode layer is provided on a side of the first insulating layer away from the base substrate;

[0024] a second insulating layer, provided on a side of the first source and drain layer away from the base substrate;

[0025] an anode layer, disposed between the second insulating layer and the first pixel definition layer;

[0026] The first sub-portion is made of the same material as the first source / drain layer or the anode layer.

[0027] Optionally, the alignment mark further includes:

[0028] a fourth subsection, disposed between the first subsection and the second subsection;

[0029] The fourth sub-portion is made of the same material as the second insulating layer, and the fourth sub-portion has the same area as the first sub-portion.

[0030] Optionally, the display panel further includes:

[0031] a first planar layer, disposed between the second insulating layer and the anode layer;

[0032] Among them, the alignment mark also includes a fourth sub-section and a fifth sub-section arranged between the first sub-section and the second sub-section, the fourth sub-section is made of the same material as the second insulating layer, the fifth sub-section is made of the same material as the first flat layer, and the areas of the fourth sub-section, the fifth sub-section and the first sub-section are equal.

[0033] The present application also proposes a display device, which includes the above-mentioned display panel.

[0034] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0036] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0037] Figure 1 A top view of two substrates to be aligned in a display panel provided in an embodiment of the present application;

[0038] Figure 2 A simplified structural diagram of a display panel provided in an embodiment of the present application;

[0039] Figure 3 A diagram of the film layers of a display panel provided in an embodiment of the present application;

[0040] Figure 4 for Figure 2 Cross-section of part of the membrane layer in the middle section MM;

[0041] Figure 5a A first cross-sectional view of an alignment mark provided in an embodiment of the present application;

[0042] Figure 5b A first top view of the alignment mark provided in an embodiment of the present application;

[0043] Figure 6a A second cross-sectional view of the alignment mark provided in an embodiment of the present application;

[0044] Figure 6bA second top view of the alignment mark provided in an embodiment of the present application;

[0045] Figure 7a A third cross-sectional view of the alignment mark provided in an embodiment of the present application;

[0046] Figure 7b A third top view of the alignment mark provided in an embodiment of the present application;

[0047] Figure 8a A fourth cross-sectional view of the alignment mark provided in an embodiment of the present application;

[0048] Figure 8b A fourth top view of the alignment mark provided in an embodiment of the present application;

[0049] Figure 9a A fifth cross-sectional view of the alignment mark provided in an embodiment of the present application;

[0050] Figure 9b This is a fifth top view of the alignment mark provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] 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 creative work are within the scope of protection of the present application.

[0052] For current OLED display panels, the material of the light-emitting layer is usually prepared by inkjet printing. Therefore, the OLED display panel needs to be provided with an alignment mark that can be recognized by the inkjet printing equipment, or the color filter layer of the OLED display panel is provided on the opposing substrate, and the alignment of the opposing substrate and the array substrate needs to use an alignment mark; for example, Figure 1 In this structure, the first substrate SUB1 can serve as the array side of the display panel, and the second substrate SUB2 can serve as the color filter side of the display panel. The alignment mark on the first substrate SUB1 needs to be aligned with the alignment mark on the second substrate SUB2 to ensure that the pixel areas on the first substrate SUB1 correspond to the color filter areas on the second substrate SUB2. However, current alignment marks typically consist of at least one layer of organic material stacked on an inorganic material. However, the adhesion between inorganic and organic materials is weak, leading to the problem of separation between the alignment mark and the inorganic material.

[0053] See also Figures 2 to 9bThe present application proposes a display panel 100, which includes a base substrate 10, a first insulating layer IL1 and at least two alignment marks 80, wherein the first insulating layer IL1 is arranged on one side of the base substrate 10, and the alignment marks 80 are arranged on a side of the first insulating layer IL1 away from the base substrate 10, and at least two alignment marks 80 are located at the periphery of the display panel 100, that is, located in the non-display area NA of the display panel 100.

[0054] In this embodiment, the alignment mark 80 includes a first sub-portion 810 and a second sub-portion 820 provided on a side of the first sub-portion 810 away from the base substrate 10 , and the orthographic projection of the second sub-portion 820 on the first sub-portion 810 is located within the first sub-portion 810 .

[0055] In this embodiment, the adhesion between the first sub-portion 810 and the first insulating layer IL1 is greater than the adhesion between the second sub-portion 820 and the first insulating layer IL1 .

[0056] The present application provides an alignment mark 80 including a first sub-section 810 and a second sub-section 820 on the inorganic layer, and uses the first sub-section 810 having a larger adhesive force with the inorganic layer as the bottom of the alignment mark 80, and the second sub-section 820 having a smaller adhesive force with the inorganic layer as the top of the alignment mark 80, thereby improving the adhesion between the alignment mark 80 and the inorganic layer, avoiding the technical problem of peeling between the alignment mark 80 and the inorganic layer, and improving the alignment accuracy of the product.

[0057] The technical solution of this application is now described in conjunction with specific embodiments.

[0058] See also Figure 2 The display panel 100 includes a display area AA and a non-display area NA adjacent to the display area AA. Optionally, the non-display area NA surrounds the display area AA, enclosing the display area AA. The display area AA is the area within the display panel 100 used for display functions, and contains a plurality of sub-pixels PX that implement these functions. The non-display area NA may be a border area of ​​the display panel 100, and may contain functional components that assist the sub-pixels PX within the display area AA in performing display functions.

[0059] See also Figure 2 The lower side of the display area AA is provided with a binding terminal, which can be connected to an external circuit. The binding terminal transmits the signal input from the external circuit to the data line, thereby driving the display panel 100 to display the image. For example, the binding terminal can be bonded to a chip or a chip-on-film to provide power and drive signals to the display panel 100.

[0060] See also Figure 3The display panel 100 may include a base substrate 10, an array layer 20 arranged on the base substrate 10, a pixel layer 30 arranged on the array layer 20, a light-emitting functional layer 40 and an encapsulation layer 50, a color filter layer 60 arranged on the encapsulation layer 50, and a cover layer 70 arranged on the color filter layer 60.

[0061] In this embodiment, the material of the base substrate 10 can be glass, quartz, polyimide or other materials; for example, when the display panel 100 is a flexible panel, the material of the base substrate 10 can be a flexible material such as polyimide, or a stacked film layer of a flexible material and an inorganic material; when the display panel 100 is a rigid panel, the material of the base substrate 10 can be a rigid material such as glass or quartz.

[0062] In this example, see Figure 3 The array layer 20 may include a plurality of thin film transistors, which may be of an etch-stop type, a back-channel etch type, or may be divided into a bottom-gate thin film transistor, a top-gate thin film transistor, and other structures according to the position of the gate electrode and the active layer 201, without any specific limitation. For example, Figure 3 The thin film transistor shown in is a top-gate thin film transistor, which may include an active layer 201 arranged on the base substrate 10, a first gate insulating layer 202 arranged on the active layer 201, a first gate layer GE1 arranged on the first gate insulating layer 202, a second gate insulating layer 203 arranged on the first gate layer GE1, a second gate layer GE2 arranged on the second gate insulating layer 203, a first interlayer insulating layer 204 arranged on the second gate layer GE2, a second interlayer insulating layer 205 arranged on the first interlayer insulating layer 204, a first source-drain layer SD1 arranged on the second interlayer insulating layer 205, a second insulating layer IL2 arranged on the first source-drain layer SD1, a first planarizing layer 206 arranged on the second insulating layer IL2, a second source-drain layer SD2 arranged on the first planarizing layer 206, a second planarizing layer 207 arranged on the second source-drain layer SD2, and a third planarizing layer 208 arranged on the second planarizing layer 207.

[0063] It should be noted that the number of source and drain layers can be set according to the requirements of wiring space. For example, the source and drain layers of the present application can be two layers. At the same time, the number of gate layers can be set according to the requirements of wiring space and capacitance. For example, the gate layers of the present application can be two layers.

[0064] It should be noted that the first insulating layer IL1 of the present application can be at least one of the first gate insulating layer 202, the second gate insulating layer 203, the first interlayer insulating layer 204 and the second interlayer insulating layer 205, and the first gate insulating layer 202, the second gate insulating layer 203, the first interlayer insulating layer 204 and the second interlayer insulating layer 205 are all inorganic materials composed of elements such as nitrogen, silicon, oxygen, and aluminum.

[0065] It should be noted that the flat layer of the present application is provided to ensure the flatness of the film layer, and the number of flat layers is set according to the flatness requirements. For example, the flat layer of the present application can be three layers.

[0066] See also Figure 3 The pixel layer 30 may include a first pixel definition layer 310 and a second pixel definition layer 320. The first pixel definition layer 310 is arranged on the side of the first insulating layer IL1 away from the base substrate 10, and the second pixel definition layer 320 is arranged on the surface of the first pixel definition layer 310 away from the base substrate 10.

[0067] It should be noted that since the light-emitting layer 402 of the present application is prepared using an inkjet printing process, in order to reduce the accuracy of inkjet printing, the first pixel definition layer 310 of the present application may include a plurality of first pixel dams 311 that are staggered horizontally and vertically, and the first pixel dams 311 that are staggered horizontally and vertically enclose a plurality of pixel openings corresponding to sub-pixels. The second pixel definition layer 320 includes a plurality of second pixel dams 321 in a horizontal or vertical direction, and the plurality of sub-pixels between two adjacent second pixel dams 321 have the same color, so that in the inkjet printing process, the plurality of sub-pixels between two adjacent second pixel dams 321 can be printed simultaneously along the direction of the second pixel dam 321, thereby reducing the accuracy of inkjet printing and improving the process efficiency.

[0068] In this embodiment, since the second pixel dam 321 mainly serves to isolate sub-pixels of different colors, the thickness of the second pixel dam 321 of the present application may be greater than the thickness of the first pixel dam 311 .

[0069] See also Figure 3 and Figure 4 The light-emitting functional layer 40 may include an anode layer 401 disposed on the third planar layer 208, a light-emitting layer 402 disposed on the anode layer 401, and a cathode layer 403 disposed on the light-emitting layer 402. The anode layer 401 includes a plurality of anodes corresponding one-to-one to the pixel openings, and the light-emitting layer 402 may include a plurality of light-emitting pixels corresponding one-to-one to the plurality of anodes.

[0070] See also Figure 3 and Figure 4The encapsulation layer 50 covers the pixel layer 30 and continuously covers multiple pixel openings and multiple light-emitting pixels; the encapsulation layer 50 includes a first inorganic encapsulation layer 501, an organic encapsulation layer 502, and a second inorganic encapsulation layer 503 which are stacked in sequence.

[0071] In this embodiment, the first inorganic encapsulation layer 501 and / or the second inorganic encapsulation layer 503 extend from the display area AA to the non-display area NA, and the first inorganic encapsulation layer 501 and / or the second inorganic encapsulation layer 503 are overlapped on the retaining wall structure, and the organic encapsulation layer 502 extends to the non-display area NA and is terminated at the retaining wall structure.

[0072] In this embodiment, the display panel 100 may include at least one retaining wall structure Dm; see Figure 4 The display panel 100 includes a first blocking wall Dm1 and a second blocking wall Dm2. The first blocking wall Dm1 is arranged close to the display area AA of the display panel 100, and the second blocking wall Dm2 is arranged away from the display area AA of the display panel 100. The thicknesses of the first blocking wall Dm1 and the second blocking wall Dm2 can be designed differently. For example, the thickness of the second blocking wall Dm2 can be greater than the thickness of the first blocking wall Dm1. The first blocking wall Dm1 and the second blocking wall Dm2 can be formed in the same mask process as at least one of the planar layer and the pixel definition layer in the array layer 20.

[0073] See also Figure 3 The color filter layer 60 includes a plurality of color resists 610 and light shielding units 620 disposed on both sides of the color resists 610 , and one color resist 610 corresponds to one light-emitting pixel.

[0074] See also Figure 3 The cover layer 70 is provided on a side of the color filter layer 60 away from the base substrate 10 . The cover layer 70 may be a glass cover or formed directly on the color filter layer 60 .

[0075] See also Figure 2 The display panel 100 may include four alignment marks 80, and the four alignment marks 80 may be set at the four top corners of the display panel 100. The inkjet printing device aligns with the four alignment marks 80 to drip corresponding light-emitting materials into the pixel openings in the pixel layer 30.

[0076] See also Figure 5aThe alignment mark 80 may include a first sub-portion 810 and a second sub-portion 820 provided on the first sub-portion 810. The second sub-portion 820 may be prepared in the process of preparing the first pixel definition layer 310 or the second pixel definition layer 320, that is, the second sub-portion 820 is made of the same material as one of the first pixel definition layer 310 or the second pixel definition layer 320.

[0077] In this embodiment, since the materials of the first pixel definition layer 310 and the second pixel definition layer 320 are both organic materials, and the adhesion between the organic materials and the underlying first insulating layer IL1 is relatively weak, the problem of film peeling is prone to occur; however, the present application improves the adhesion between the alignment mark 80 and the inorganic layer by providing a first sub-portion 810 with a stronger adhesion to the first insulating layer IL1 support as the bottom of the alignment mark 80, thereby avoiding the technical problem of peeling between the alignment mark 80 and the inorganic layer.

[0078] In this embodiment, the area of ​​the second sub-section 820 can be smaller than the area of ​​the first sub-section 810; for example, the first sub-section 810 and the second sub-section 820 can be regular squares, and the length and width of the first sub-section 810 range from 48 μm to 52 μm, and the width and length of the second sub-section 820 range from 18 μm to 22 μm.

[0079] See also Figure 5b The outer contour of the first sub-portion 810 may be a square with a width and a length of 50 μm, and the outer contour of the second sub-portion 820 may be a square with a width and a length of 20 μm.

[0080] It should be noted that the shapes of the first sub-section 810 and the second sub-section 820 can also be rectangular, cross-shaped or other special structures.

[0081] exist Figure 5a In the structure, the first sub-portion 810 can be prepared in the process of preparing the anode layer 401, the second source-drain layer SD2 or the first source-drain layer SD1. For example, the material of the first sub-portion 810 can be the same as the material of any one of the anode layer 401, the second source-drain layer SD2 or the first source-drain layer SD1.

[0082] In this embodiment, since the anode layer 401, the second source-drain layer SD2 or the first source-drain layer SD1 are all conductive materials, and the adhesive force between the conductive material and the inorganic material is greater than the adhesive force between the organic material and the inorganic material, the setting of the first sub-section 810 can increase the adhesive force between the alignment mark 80 and the first insulating layer IL1, thereby avoiding the technical problem of peeling between the alignment mark 80 and the inorganic layer.

[0083] See also Figure 6a The alignment mark 80 also includes a third sub-portion 830 disposed on the side of the first sub-portion 810 away from the first insulating layer IL1, the third sub-portion 830 can cover the first sub-portion 810, and the second sub-portion 820 is disposed on the surface of the third sub-portion 830 away from the first sub-portion 810.

[0084] In this embodiment, the alignment mark 80 includes a first sub-section 810, a second sub-section 820 and a third sub-section 830 that are stacked; the first sub-section 810 can be prepared in the process of preparing the anode layer 401, the second source and drain layer SD2 or the first source and drain layer SD1, the second sub-section 820 can be prepared in the process of preparing the second pixel definition layer 320, and the third sub-section 830 can be prepared in the process of preparing the first pixel definition layer 310, that is, the material of the first sub-section 810 is a conductive material, and the materials of the second sub-section 820 and the third sub-section 830 are organic materials.

[0085] See also Figure 6a The area of ​​the first sub-section 810 is smaller than that of the third sub-section 830, that is, the third sub-section 830 can completely cover the first sub-section 810. The setting of the larger area of ​​the third sub-section 830 can increase the identifiable area of ​​the alignment mark 80 and reduce the difficulty of identifying the alignment mark 80.

[0086] See also Figure 6b The outer contour of the first sub-section 810 can be a square with a width and length of 50 μm, the outer contour of the second sub-section 820 can be a square with a width and length of 20 μm, and the outer contour of the third sub-section 830 can be a square with a width and length greater than or equal to 80 μm.

[0087] See also Figure 7a The alignment mark 80 also includes a third sub-portion 830 arranged on the side of the first sub-portion 810 away from the first insulating layer IL1, and a groove is opened on the third sub-portion 830. The second sub-portion 820 is located in the groove, and the second sub-portion 820 is in contact with the first sub-portion 810 in the groove.

[0088] Figure 7a The structure of the middle alignment mark 80 is Figure 6a The structure of the center alignment mark 80 is the same or similar, except that a groove is provided on the third sub-section 830, and the groove hollows out part of the third sub-section 830 to expose the first sub-section 810 corresponding to the groove, and the second sub-section 820 is arranged in the groove and contacts the first sub-section 810.

[0089] exist Figure 7aIn the structure, the outer contour of the first sub-section 810 is retracted relative to the outer contour of the third sub-section 830, that is, the third sub-section 830 is a ring structure with a larger area, and the outer contour of the first sub-section 810 is located within the ring structure. The alignment mark 80 with a special-shaped structure reduces the difficulty of identifying the alignment mark 80.

[0090] See also Figure 7b The outer contour of the first sub-section 810 can be a square with a width and length of 80 μm, the outer contour of the second sub-section 820 can be a square with a width and length of 20 μm, and the outer contour of the third sub-section 830 can be a square with a width and length greater than or equal to 110 μm.

[0091] See also Figure 8a The alignment mark 80 further includes a fourth sub-portion 840 disposed between the first sub-portion 810 and the second sub-portion 820. The fourth sub-portion 840 is made of the same material as the second insulating layer IL2, and the fourth sub-portion 840 and the first sub-portion 810 have the same area.

[0092] In this embodiment, the fourth sub-section 840 can be prepared in the process of preparing the second insulating layer IL2, the first sub-section 810 can be prepared in the process of preparing the first source and drain layer SD1, and the second sub-section 820 can be prepared in the process of preparing the first pixel definition layer 310 or the second pixel definition layer 320.

[0093] See also Figure 8b The outer contours of the first sub-section 810 and the fourth sub-section 840 may be squares with a width and a length of 50 μm, and the outer contour of the second sub-section 820 may be a square with a width and a length of 20 μm.

[0094] See also Figure 9a The alignment mark 80 also includes a fourth sub-portion 840 and a fifth sub-portion 850 arranged between the first sub-portion 810 and the second sub-portion 820. The fourth sub-portion 840 is made of the same material as the second insulating layer IL2, and the fifth sub-portion 850 is made of the same material as the first planar layer 206. The areas of the fourth sub-portion 840, the fifth sub-portion 850 and the first sub-portion 810 are equal.

[0095] In this embodiment, the fifth sub-section 850 can be prepared in the process of preparing the first planar layer 206, the fourth sub-section 840 can be prepared in the process of preparing the second insulating layer IL2, the first sub-section 810 can be prepared in the process of preparing the first source and drain layer SD1, and the second sub-section 820 can be prepared in the process of preparing the first pixel definition layer 310 or the second pixel definition layer 320.

[0096] See also Figure 9b The outer contours of the first sub-section 810, the fourth sub-section 840 and the fifth sub-section 850 may be squares with a width and a length of 50 μm, and the outer contour of the second sub-section 820 may be a square with a width and a length of 20 μm.

[0097] It should be noted that in Figure 8a and Figure 9a In the structure, although there is contact between organic material and inorganic material in the alignment mark, the adhesion force between the two cross sections is reduced, for example Figure 8a The second sub-section 820 made of organic material is in contact with the fourth sub-section 840 made of inorganic material. Figure 9a The fifth sub-section 850 composed of organic material is in contact with the fourth sub-section 840 composed of inorganic material, but the peeling of the alignment mark 80 mainly occurs at the interface between the first sub-section 810 and the first insulating layer IL1. It is sufficient to ensure that there is no relative displacement between the first sub-section 810 and the first insulating layer IL1.

[0098] It should be noted that the display device of the present application can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc.

[0099] The present application provides a display panel and a display device; the display panel includes a base substrate, a first inorganic layer and an alignment mark provided on the first inorganic layer, the alignment mark is provided on a side of the first inorganic layer away from the base substrate, the alignment mark includes a first sub-portion and a second sub-portion provided on a side of the first sub-portion away from the base substrate, the orthographic projection of the second sub-portion on the first sub-portion is located within the first sub-portion, and the adhesion between the first sub-portion and the first inorganic layer is greater than the adhesion between the second sub-portion and the first inorganic layer; the present application improves the adhesion between the alignment mark and the inorganic layer by using the first sub-portion with greater adhesion to the inorganic layer as the bottom of the alignment mark and the second sub-portion with less adhesion to the inorganic layer as the top of the alignment mark, thereby avoiding the technical problem of peeling between the alignment mark and the inorganic layer and improving the alignment accuracy of the product.

[0100] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0101] 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.

[0102] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0103] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A display panel, characterized in that: include: substrate; A first insulating layer is provided on one side of the base substrate; A first pixel definition layer is provided on a side of the first insulating layer away from the base substrate; a second pixel definition layer, disposed on a surface of the first pixel definition layer away from the base substrate; At least two alignment marks are located on a periphery of the display panel, the alignment marks are provided on a side of the first insulating layer away from the base substrate, the alignment marks include a first sub-portion and a second sub-portion provided on a side of the first sub-portion away from the base substrate, the second sub-portion being made of the same material as one of the first pixel definition layer or the second pixel definition layer; The adhesion between the first sub-section and the first insulating layer is greater than the adhesion between the second sub-section and the first insulating layer.

2. The display panel according to claim 1, wherein: The thickness of the first pixel definition layer is smaller than the thickness of the second pixel definition layer.

3. The display panel according to claim 1, wherein: An area of ​​the second sub-portion is smaller than an area of ​​the first sub-portion.

4. The display panel according to claim 3, wherein: The length and width of the first sub-portion range from 48 μm to 52 μm, and the width and length of the second sub-portion range from 18 μm to 22 μm.

5. The display panel according to any one of claims 1 to 4, characterized in that: The alignment mark also includes: a third sub-section, provided on a side of the first sub-section away from the first insulating layer; The third sub-section covers the first sub-section, and the second sub-section is provided on a surface of the third sub-section away from the first sub-section; Alternatively, a groove is formed on the third sub-portion, the second sub-portion is located in the groove, and the second sub-portion contacts the first sub-portion in the groove.

6. The display panel according to claim 5, wherein: The second sub-portion is made of the same material as the second pixel definition layer, the third sub-portion is made of the same material as the first pixel definition layer, and an outer contour of the first sub-portion is inwardly contracted relative to an outer contour of the third sub-portion.

7. The display panel according to claim 2 or 3, characterized in that: The display panel includes: A first source-drain electrode layer is provided on a side of the first insulating layer away from the base substrate; a second insulating layer, provided on a side of the first source and drain layer away from the base substrate; an anode layer, disposed between the second insulating layer and the first pixel definition layer; The first sub-portion is made of the same material as the first source / drain layer or the anode layer.

8. The display panel according to claim 7, wherein: The alignment mark also includes: a fourth subsection, disposed between the first subsection and the second subsection; The fourth sub-portion is made of the same material as the second insulating layer, and the fourth sub-portion has the same area as the first sub-portion.

9. The display panel according to claim 7, wherein: The display panel further includes: a first planar layer, disposed between the second insulating layer and the anode layer; Among them, the alignment mark also includes a fourth sub-section and a fifth sub-section arranged between the first sub-section and the second sub-section, the fourth sub-section is made of the same material as the second insulating layer, the fifth sub-section is made of the same material as the first flat layer, and the areas of the fourth sub-section, the fifth sub-section and the first sub-section are equal.

10. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 9.

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