Display panel and display device with same

Abstract

The invention discloses a display panel and a display device with the same. The display panel comprises a substrate, a flat layer and a pixel defining layer, and the flat layer is arranged on one side of the substrate; the pixel defining layer is arranged on the side, away from the substrate, of the flat layer, the pixel defining layer comprises a plurality of isolation structures arranged at intervals, and pixel opening areas are formed by the adjacent isolation structures; the pixel opening area is provided with a pixel electrode layer and a pixel material layer; and a connecting part is arranged between the isolation structure and the flat layer. According to the display panel, on the premise of ensuring the exposure and the developing time, the probability that small-range Peeling occurs in a non-light-emitting area or Undercut with a certain angle occurs at the lap joint edge of an anode and a PDL can be reduced, and therefore the probability that electric leakage and short circuit occur in the technological process is reduced.

Description

Technical Field

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

[0002] Organic electroluminescent devices (OLEDs) have great application potential in the fields of display and lighting due to their advantages such as self-luminescence, fast response, wide viewing angle, high brightness, bright colors, and light weight.

[0003] In traditional vapor deposition OLED products or printed OLED products, in order to ensure a certain angle of the pixel definition layer (PDL), organic materials (such as PD, epoxy resin, acrylic, etc.) are usually used as PDL materials, which can be divided into positive photoresist and negative photoresist according to the exposure characteristics. Taking positive photoresist as an example, during the process, the small exposure amount and short development time will make PDL easily remain on the surface of the anode, which will reduce the process window and reduce the product yield. Therefore, in order to reduce the residue of PDL on the anode, it is generally necessary to increase the exposure amount to extend the development time. However, extending the development time will cause a small range of PDL peeling in the non-luminous area, or a certain angle of undercut at the overlap edge of the anode and PDL, resulting in leakage short circuits in the process. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a display panel, which can reduce the probability of small-scale peeling in the non-luminous area or undercut at a certain angle at the overlap edge of the anode and the PDL under the premise of ensuring the exposure amount and development time, thereby reducing the probability of leakage short circuit in the process.

[0005] The present invention also aims to provide a display device having the above display panel.

[0006] A display panel according to an embodiment of the first aspect of the present invention includes: substrate; A flat layer is disposed on one side of the substrate; A pixel defining layer is disposed on a side of the flat layer away from the substrate, the pixel defining layer comprises a plurality of isolation structures disposed at intervals, adjacent isolation structures form a pixel opening region; the pixel opening region is provided with a pixel electrode layer and a pixel material layer; A connecting portion is provided between the isolation structure and the planar layer.

[0007] According to some embodiments of the present invention, the connecting portion includes matching protrusions and grooves, and one of the flat layer and the isolation structure is provided with the protrusion, and the other is provided with the groove.

[0008] According to some embodiments of the present invention, the groove is provided on a side of the planar layer facing the isolation structure, and the protrusion is provided on a side of the isolation structure facing the planar layer.

[0009] According to some embodiments of the present invention, there are a plurality of grooves, which are arranged at intervals, and there are a plurality of protrusions, which are arranged at intervals and correspond one-to-one to the grooves.

[0010] According to some embodiments of the present invention, the maximum width of the groove in the length direction of the flat layer is w, w≤2.5um; The maximum spacing of the grooves in the length direction of the flat layer is p, p≤2um; The depth of the groove in the orthographic projection direction is h, the thickness of the flat layer is d, and 1 / 3≤h / d≤1.

[0011] According to some embodiments of the present invention, the groove has a maximum cross section in a direction perpendicular to the orthographic projection direction, and the size of the maximum cross section is greater than the size of the cross section of the opening end of the groove.

[0012] According to some embodiments of the present invention, the cross-sectional shape of the groove along the orthographic projection direction is a trapezoid, and the size of the closed end of the groove is larger than the size of the open end of the groove.

[0013] According to some embodiments of the present invention, a projection area of ​​the groove in the orthographic projection direction is located within a projection area of ​​the isolation structure in the orthographic projection direction.

[0014] According to some embodiments of the present invention, the connecting portion is a connecting layer, and the connection strength between the connecting layer and the planar layer and the isolation structure is greater than the connection strength between the planar layer and the isolation structure.

[0015] According to some embodiments of the present invention, one side of the connection layer is connected to a side of the planar layer facing the isolation structure, and the other side of the connection layer is connected to a side of the isolation structure facing the planar layer.

[0016] According to some embodiments of the present invention, a projection area of ​​the connection layer in an orthographic projection direction is located within a projection area of ​​the isolation structure in the orthographic projection direction.

[0017] According to some embodiments of the present invention, a minimum distance between a boundary of the connection layer in the orthographic projection direction and a boundary of the isolation structure in the orthographic projection direction is l, where l≥2 um.

[0018] According to some embodiments of the present invention, a material of at least a portion of the connection layer is the same as a material of the pixel electrode layer.

[0019] In the present application, a display panel is provided, which includes a substrate, a flat layer and a pixel defining layer, wherein the flat layer is arranged on one side of the substrate; the pixel defining layer is arranged on the side of the flat layer away from the substrate, the pixel defining layer includes a plurality of isolation structures arranged at intervals, and adjacent isolation structures form a pixel opening area; the pixel opening area is provided with a pixel electrode layer and a pixel material layer; a connecting portion is provided between the isolation structure and the flat layer. By providing a plurality of isolation structures arranged at intervals on the pixel defining layer, the shape and size of the pixel can be defined and limited by the isolation structure, the pixel can be isolated, crosstalk can be prevented, and each pixel can be ensured to work correctly. The pixel opening area formed by the adjacent isolation structures is provided with a pixel electrode layer and a pixel material layer for display. The connecting portion provided between the isolation structure and the flat layer can improve the adhesion between the flat layer and the isolation structure, so that the exposure amount and the development time can be guaranteed. At the same time, the non-luminous area is not prone to small-scale Peeling, or the anode and the PDL overlap edge are not prone to Undercut at a certain angle, thereby making the process less prone to leakage short circuits. A display device according to an embodiment of the second aspect of the present invention includes the display panel in the above embodiment.

[0020] According to the display device of the embodiment of the present invention, by adopting the absorption display panel in the above embodiment, good display of the display device is ensured and the service life of the display device is extended.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the structure of a display panel in the prior art; Figure 2 It is a schematic diagram of a small range of Peeling in a non-luminous area of ​​a display panel in the prior art after the exposure is increased; Figure 3 It is a schematic diagram of an undercut at a certain angle between the anode and the PDL overlap edge after the exposure amount of the display panel in the prior art is increased; Figure 4 is a schematic structural diagram of a first embodiment of a display panel according to an embodiment of the present application; Figure 5 is a schematic structural diagram of a second embodiment of a display panel according to an embodiment of the present application; Figure 6 is a schematic structural diagram of a third embodiment of a display panel according to an embodiment of the present application; Figure 7is a schematic structural diagram of a fourth embodiment of a display panel according to an embodiment of the present application; Figure 8 is a schematic structural diagram of a fifth embodiment of a display panel according to an embodiment of the present application; Fig. 9 4 is a schematic structural diagram of a sixth embodiment of a display panel according to an embodiment of the present application.

[0023] Reference numerals: Display panel 100, Substrate 10, Flat layer 20, Pixel defining layer 30, isolation structure 31, pixel opening area 32, Pixel electrode layer 40, pixel material layer 41, Connecting portion 50, groove 51, protrusion 52, Driving circuit layer 60 , electroluminescent layer 70 , cathode layer 80 . DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific processes and examples of materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0026] Organic electroluminescent devices (OLEDs) have great application potential in the fields of display and lighting due to their advantages such as self-luminescence, fast response, wide viewing angle, high brightness, bright colors, and light weight.

[0027] In the prior art, in order to ensure a certain angle of the pixel definition layer 30 (PDL) in the vapor deposition OLED product or the printed OLED product, refer to Figure 1, usually organic materials such as PD, epoxy resin, acrylic, etc. are used as PDL materials. PDL materials can be divided into positive and negative photoresists according to the exposure characteristics. Taking positive photoresists as an example, since PDL is located on the side of the anode layer away from the substrate 10, and is directly connected to the flat layer 20 through the opening area of ​​the anode layer, during the process, the exposure amount is small and the development time is short, which will make PDL easily remain on the anode surface, which will reduce the process window and reduce the product yield. Increasing the exposure amount and extending the development time will produce small-scale PDL peeling in the non-luminous area. Figure 2 , or the undercut problem at a certain angle appears at the edge where the anode and PDL overlap. Figure 3 , resulting in leakage and short circuit in the process.

[0028] Based on this, the present invention proposes a display panel 100, which can reduce the probability of small-scale peeling in the non-luminous area or undercut at a certain angle at the overlapping edge of the anode and PDL while ensuring the exposure amount and development time, thereby reducing the probability of leakage short circuit in the process.

[0029] Figure 4-Figure 9 FIG. 1 is a schematic diagram of the structure of a display panel 100 according to an embodiment of the present invention. Figure 4-Figure 9 The display panel 100 includes a substrate 10, a planar layer 20 and a pixel defining layer 30. The planar layer 20 is arranged on one side of the substrate 10; the pixel defining layer 30 is arranged on the side of the planar layer 20 away from the substrate 10, and the pixel defining layer 30 includes a plurality of isolation structures 31 arranged at intervals, and adjacent isolation structures 31 form a pixel opening area 32; the pixel opening area 32 is provided with a pixel electrode layer 40 and a pixel material layer 41; a connecting portion 50 is arranged between the isolation structure 31 and the planar layer 20.

[0030] Specifically, refer to Figure 4-Figure 9 The display panel 100 in the embodiment of the present invention includes a substrate 10, which is used to provide support. The substrate 10 can be a transparent plastic plate, a glass plate, a metal foil plate, etc.

[0031] The display panel 100 further includes a flat layer 20, which is disposed on one side of the substrate 10. Since the surface of the substrate 10 has unevenness, the flat layer 20 is provided to facilitate the provision of other layers.

[0032] The display panel 100 also includes a pixel defining layer 30, which is arranged on the side of the flat layer 20 away from the substrate 10 for easy installation. The pixel defining layer 30 includes a plurality of isolation structures 31 arranged at intervals, through which the shape and size of the pixel can be defined and limited to ensure that each pixel can work correctly. Specifically, the isolation structure 31 can achieve accurate alignment and positioning of the pixel, ensure isolation between pixels, and prevent crosstalk. The number of isolation structures 31 is not limited, and can be one, two, four, seven, etc. Adjacent isolation structures 31 form a pixel opening area 32, and the pixel opening area 32 is provided with a pixel electrode layer 40 and a pixel material layer 41. Specifically, the pixel electrode layer 40 and the pixel material layer 41 are stacked in the pixel opening area 32, and further, the pixel electrode layer 40 is located between the pixel material layer 41 and the flat layer 20. The pixel material layer 41 of different pixel opening areas 32 can be set to be different. The sizes of multiple pixel openings can be the same or different.

[0033] A connecting portion 50 is provided between the isolation structure 31 and the flat layer 20, and the connecting portion 50 can improve the adhesion between the flat layer 20 and the isolation structure 31. In this way, under the premise of ensuring the exposure amount and the development time, it is possible to prevent small-scale peeling from occurring in the non-luminous area, or prevent undercutting at a certain angle at the overlapping edge of the anode and the PDL, thereby preventing leakage short circuits from occurring in the process.

[0034] Therefore, refer to Figure 4-Figure 9 According to the display panel 100 of the present invention, a plurality of isolation structures 31 arranged at intervals are provided on the pixel defining layer 30. The isolation structures 31 can define and limit the shape and size of the pixels, isolate the pixels, prevent crosstalk, and ensure that each pixel can work correctly. The pixel opening area 32 formed by adjacent isolation structures 31 is provided with a pixel electrode layer 40 and a pixel material layer 41 for display. The connecting portion 50 provided between the isolation structure 31 and the flat layer 20 can improve the adhesion between the flat layer 20 and the isolation structure 31, so that the exposure amount and the development time can be guaranteed. At the same time, it is not easy for small-scale peeling to occur in the non-luminous area, or for undercut at a certain angle to occur at the overlap edge of the anode and the PDL, thereby making it less likely for leakage short circuits to occur in the process.

[0035] In some embodiments of the present invention, reference Figure 4-Figure 8 The connecting portion 50 includes matching protrusions 52 and grooves 51 , and one of the flat layer 20 and the isolation structure 31 is provided with the protrusion 52 , and the other is provided with the groove 51 .

[0036] Through the cooperation of the protrusion 52 and the groove 51, the contact area between the flat layer 20 and the isolation structure 31 is increased, thereby improving the adhesion between the flat layer 20 and the isolation structure 31. As a result, under a larger exposure amount and a longer development time, it is less likely that small-scale peeling will occur in the non-luminous area, or that undercut at a certain angle will occur at the overlapping edge of the anode and the PDL.

[0037] Specifically, the protrusion 52 can be disposed on the flat layer 20, and in this case, the groove 51 is disposed on the isolation structure 31; or, the protrusion 52 can be disposed on the isolation structure 31, and in this case, the groove 51 is disposed on the flat layer 20. The protrusion 52 and the groove 51 are mutually matched structures so that they can contact each other and increase the contact area.

[0038] Reference Figure 4-Figure 8 The shapes of the protrusion 52 and the groove 51 are not limited. For example, the protrusion 52 and the groove 51 can be rectangular, regular trapezoidal, inverted trapezoidal, irregular, triangular, semicircular, 3 / 4 circular, 1 / 3 circular, elliptical with a notch, etc.

[0039] The size of the groove 51 can gradually increase from the open end to the closed end, and can be specifically a linear increase, for example, a trapezoidal shape, etc.; it can also increase reciprocatingly, for example, first decrease and then increase or first increase and then decrease, but the overall size increases, for example, it can be a wavy line or a broken line, etc.; it can also increase in a curved shape, for example, it can be an arc with a smaller open end, etc.

[0040] The size of the groove 51 can gradually decrease from the open end to the closed end. Specifically, it can be a linear decrease, for example, an inverted trapezoid, etc.; it can also be reciprocatingly reduced, for example, first decreasing and then increasing or first increasing and then decreasing, but the overall size is reduced, for example, it can be a wavy line or a broken line, etc.; it can also be reduced in a curved shape, for example, it can be a larger arc at the open end, etc.

[0041] The dimensions of the open end and the closed end of the groove 51 may be constant, specifically, they may be always constant, for example, a rectangle, etc.; they may also be reciprocatingly constant, for example, first decreasing and then increasing or first increasing and then decreasing, but the whole may be constant, for example, they may be a wavy line or a broken line, etc.; they may also be curved and constant, for example, they may be an arc with the same dimensions as the open end and the closed end, etc.

[0042] In some embodiments of the present invention, reference Figure 4-Figure 8 The groove 51 is disposed on a side of the planar layer 20 facing the isolation structure 31 , and the protrusion 52 is disposed on a side of the isolation structure 31 facing the planar layer 20 .

[0043] The groove 51 is arranged on the side of the flat layer 20 facing the isolation structure 31, which is convenient for processing and arrangement, reduces the processing difficulty, and improves the processing efficiency.

[0044] Specifically, the groove 51 is disposed on the surface of the planar layer 20 facing the isolation structure 31 and in contact with the isolation structure 31 , and the protrusion 52 is disposed on the surface of the isolation structure 31 facing the planar layer 20 and in contact with the planar layer 20 .

[0045] In some embodiments, the groove 51 may be formed by etching, and then the pixel defining layer 30 is prepared, and the protrusion 52 is formed in the groove 51 during the preparation of the pixel defining layer 30 .

[0046] In some embodiments of the present invention, reference Figure 4-Figure 8 There are multiple grooves 51 , and the multiple grooves 51 are arranged at intervals. There are multiple protrusions 52 , and the multiple protrusions 52 are arranged at intervals and correspond to the grooves 51 one by one.

[0047] By providing a plurality of grooves 51 arranged at intervals and a plurality of protrusions 52 corresponding to the grooves 51 one by one, the contact area between the planar layer 20 and the isolation structure 31 is further increased, thereby further improving the adhesion between the planar layer 20 and the isolation structure 31 .

[0048] The number of the grooves 51 and the protrusions 52 is not limited and can be set according to actual needs. For example, two, three, five, etc. can be set. Preferably, the grooves 51 and the protrusions 52 are set to three. The shapes of the multiple grooves 51 can be the same or different. Preferably, the shapes of the multiple grooves 51 are set to be the same for easy processing. The spacing between the multiple grooves 51 can be the same or different. Preferably, the spacing between the multiple grooves 51 is set to be the same for easy processing.

[0049] In some embodiments of the present invention, reference Figure 5 The maximum width of the groove 51 in the length direction of the flat layer 20 is w, w≤2.5um; the maximum spacing of the groove 51 in the length direction of the flat layer 20 is p, p≤2um; the depth of the groove 51 in the orthographic projection direction is h, and the thickness of the flat layer 20 is d, 1 / 3≤h / d≤1.

[0050] It is understandable that the width of the groove 51 in the length direction of the flat layer 20 can be set according to the number of grooves 51 and the spacing between the grooves 51. Theoretically, the larger the width of the groove 51, the larger the contact area between the flat layer 20 and the isolation structure 31, and the greater the adhesion between the two. However, the larger the width of the groove 51 in the length direction of the flat layer 20, the fewer the number of grooves 51 that can be set. Therefore, after comprehensive consideration, the maximum width w of the groove 51 in the length direction of the flat layer 20 is set to ≤2.5um. Specifically, the width w of the groove 51 in the length direction of the flat layer 20 can be 2.5um, 2.3 um, 2.1 um, 2.0 um, 1.8 um, 1.6um, 1.3 um, etc.

[0051] It is understandable that the spacing of the grooves 51 in the length direction of the flat layer 20 can be set according to the number of grooves 51 and the width of the grooves 51. Theoretically, the smaller the spacing of the grooves 51, the more the number of grooves 51 can be, or the greater the width of the grooves 51 in the length direction of the flat layer 20 can be, so that the contact area between the flat layer 20 and the isolation structure 31 can be increased, thereby increasing the adhesion between the two. However, the smaller the spacing of the grooves 51 in the length direction of the flat layer 20, the higher the processing difficulty. Therefore, after comprehensive consideration, the maximum spacing p of the grooves 51 in the length direction of the flat layer 20 is set to ≤2um. Specifically, the spacing p of the grooves 51 in the length direction of the flat layer 20 can be 2.0um, 1.8 um, 1.6 um, 1.3 um, 1.0um, etc.

[0052] It is understandable that the depth of the groove 51 in the orthographic projection direction of the flat layer 20 can be set according to the thickness of the flat layer 20. Theoretically, the deeper the depth of the groove 51, the larger the contact area between the flat layer 20 and the isolation structure 31, and thus the greater the adhesion between the two. However, if the depth of the groove 51 is too deep, it is easy to penetrate the flat layer 20 or affect the overall structure of the flat layer 20. Therefore, taking all factors into consideration, the ratio h / d of the depth h of the groove 51 in the orthographic projection direction to the thickness d of the flat layer 20 is set to: 1 / 3≤h / d≤1. Specifically, the ratio h / d of the depth h of the groove 51 in the orthographic projection direction to the thickness d of the flat layer 20 can be 1 / 3, 1 / 2, 2 / 3, 3 / 4, 1, etc.

[0053] In some embodiments of the present invention, reference Figure 6-Figure 8 The groove 51 has a maximum cross section in a direction perpendicular to the orthographic projection direction, and the size of the maximum cross section is greater than the size of the cross section of the opening end of the groove 51.

[0054] A groove 51 with a maximum cross-section is provided, and the size of the maximum cross-section is larger than the size of the cross-section of the opening end of the groove 51. In this way, the rivet structure formed by the groove 51 and the protrusion 52 forms an inner hook effect inside the groove 51, further improving the connection strength between the two, thereby improving the connection strength between the flat layer 20 and the isolation structure 31.

[0055] It can be understood that the groove 51 has multiple cross sections in the orthographic projection direction.

[0056] In some embodiments, the sizes of the multiple cross sections may gradually increase along the direction from the open end to the closed end of the groove 51. For example, the cross-sectional shape of the groove 51 along the orthographic projection direction may be a trapezoid.

[0057] In some embodiments, the sizes of the multiple cross sections may first increase and then decrease along the direction from the open end to the closed end of the groove 51. For example, the cross-sectional shape of the groove 51 along the orthographic projection direction may be a hexagon, an arc, or the like.

[0058] In some embodiments, the sizes of the multiple cross sections may first decrease and then increase along the direction from the open end to the closed end of the groove 51. For example, the cross-sectional shape of the groove 51 along the orthographic projection direction may be hourglass-shaped, arc-shaped, and the like.

[0059] In some embodiments, the sizes of the multiple cross sections may cycle between increasing and decreasing along the direction from the open end to the closed end of the groove 51. For example, both sides of the cross section of the groove 51 along the orthographic projection direction may be wavy, broken line, etc.

[0060] In some embodiments of the present invention, reference Figure 6 The cross-sectional shape of the groove 51 along the orthographic projection direction is a trapezoid, and the size of the closed end of the groove 51 is larger than the size of the open end of the groove 51.

[0061] The cross-sectional shape of the groove 51 along the orthographic projection direction is set to a trapezoid. On the one hand, the rivet structure formed by the groove 51 and the protrusion 52 forms an inner hook effect inside the groove 51, which improves the connection strength between the two, thereby improving the connection strength between the flat layer 20 and the isolation structure 31. At the same time, the trapezoidal groove 51 is easy to process and set, and the processing difficulty is relatively low.

[0062] In some embodiments, the trapezoid may be an isosceles trapezoid, a right-angled trapezoid, etc. Preferably, the trapezoid is an isosceles trapezoid.

[0063] In some embodiments, the angle between the waist and the base of the trapezoid is an acute angle, for example, the angle may be 15°, 30°, 45°, 60°, 75°, 80°, etc. Preferably, the angle between the waist and the base of the trapezoid is 60°.

[0064] In some embodiments of the present invention, the projection area of ​​the groove 51 in the orthographic projection direction is located within the projection area of ​​the isolation structure 31 in the orthographic projection direction.

[0065] In some embodiments, an edge of a projection area of ​​the groove 51 in the orthographic projection direction may coincide with an edge of a projection area of ​​the isolation structure 31 in the orthographic projection direction.

[0066] In some embodiments, the edge of the projection area of ​​the groove 51 in the orthographic projection direction may have a certain gap with the edge of the projection area of ​​the isolation structure 31 in the orthographic projection direction. Specifically, the projection area of ​​the groove 51 in the orthographic projection direction may have multiple edges, and the gaps between the multiple edges and the edges of the projection area of ​​the isolation structure 31 in the orthographic projection direction may be the same or different. Preferably, the gaps between the multiple edges and the edges of the projection area of ​​the isolation structure 31 in the orthographic projection direction are the same. Further, the gap between the edge of the projection area of ​​the groove 51 in the orthographic projection direction and the edge of the projection area of ​​the isolation structure 31 in the orthographic projection direction may be ≥2um, for example, it may be 2um, 2.3um, 2.5um, 2.8um, 3.0um, 3.5um, etc.

[0067] In some embodiments of the present invention, reference Fig. 9 The connecting portion 50 is a connecting layer, and the connection strength between the connecting layer and the planar layer 20 and the isolation structure 31 is greater than the connection strength between the planar layer 20 and the isolation structure 31 .

[0068] The flat layer 20 and the isolation structure 31 are connected by a connecting layer. Since the connection strength between the connecting layer and the flat layer 20 and the isolation structure 31 is greater than the connection strength between the flat layer 20 and the isolation structure 31, the connection strength between the flat layer 20 and the isolation structure 31 is indirectly improved. Therefore, under the premise of ensuring the exposure amount and development time, it is not easy for small-scale peeling to occur in the non-luminous area, or undercut at a certain angle at the overlapping edge of the anode and the PDL, thereby making it less likely for leakage short circuits to occur in the process.

[0069] In some embodiments, one side of the connection layer connects the flat layer 20 and the isolation structure 31. The connection layer may include one or more connection layers. When there is one connection layer, it may cover part of the boundary where the flat layer 20 is connected to the isolation structure 31, or it may cover the entire boundary where the flat layer 20 is connected to the isolation structure 31. When there are multiple connection layers, the multiple connection layers may be spaced apart at the boundary where the flat layer 20 is connected to the isolation structure 31. The spacing between the multiple connection layers may be the same or different. Preferably, the spacing between the multiple connection layers may be the same.

[0070] In some embodiments, two sides of the connection layer are respectively connected to the planarization layer 20 and the isolation structure 31 .

[0071] In some embodiments of the present invention, reference Fig. 9 One side of the connecting layer is connected to the side of the planar layer 20 facing the isolation structure 31 , and the other side of the connecting layer is connected to the side of the isolation structure 31 facing the planar layer 20 .

[0072] The two sides of the connection layer are respectively connected to the flat layer 20 and the isolation structure 31 facing each other, which is convenient for processing and setting, and the processing difficulty is relatively low.

[0073] The connection layer can be provided as one or multiple connection layers provided at intervals. Preferably, the connection layer is provided as one.

[0074] It is understandable that the thickness of the connecting layer can be set according to actual needs. Specifically, the thickness of the connecting layer can be 1um-3um. For example, the thickness of the connecting layer can be 1um, 1.3um, 1.5um, 1.8um, 2.1um, 2.5um, 2.7um, 3um, etc.

[0075] It is understandable that the shape of the connection layer can be set according to actual needs. Specifically, the shape of the connection layer can be any shape. For example, the shape of the connection layer can be a regular shape, such as a rectangle, a trapezoid, a circle, a triangle, a polygon, etc.; the shape of the connection layer can also be an irregular shape, such as a flower shape, an hourglass shape, etc.

[0076] In some embodiments of the present invention, reference Fig. 9 , the projection area of ​​the connection layer in the orthographic projection direction is located within the projection area of ​​the isolation structure 31 in the orthographic projection direction.

[0077] The projection area of ​​the connection layer in the orthographic projection direction is arranged within the projection area of ​​the isolation structure 31 in the orthographic projection direction, so as to avoid contact between the connection layer and the pixel electrode layer 40 .

[0078] In some embodiments, an edge of a projection area of ​​the connection layer in the orthographic projection direction may coincide with an edge of a projection area of ​​the isolation structure 31 in the orthographic projection direction.

[0079] In some embodiments, the edge of the projection area of ​​the connection layer in the orthographic projection direction may have a certain gap with the edge of the projection area of ​​the isolation structure 31 in the orthographic projection direction. Specifically, the projection area of ​​the connection layer in the orthographic projection direction may have multiple edges, and the gaps between the multiple edges and the edges of the projection area of ​​the isolation structure 31 in the orthographic projection direction may be the same or different. Preferably, the gaps between the multiple edges and the edges of the projection area of ​​the isolation structure 31 in the orthographic projection direction are the same.

[0080] In some embodiments of the present invention, reference Fig. 9 , the minimum distance between the boundary of the connection layer in the orthographic projection direction and the boundary of the isolation structure 31 in the orthographic projection direction is l, l≥2um.

[0081] It is understandable that the larger the contact area between the connection layer and the flat layer 20 and the isolation structure 31, the greater the adhesion. Therefore, from the perspective of adhesion strength, the larger the area of ​​the connection layer, the better. That is, when the projection area of ​​the connection layer in the orthographic projection direction completely overlaps with the projection area of ​​the isolation structure 31 in the orthographic projection direction, the adhesion between the flat layer 20 and the isolation structure 31 is the strongest, but the processing difficulty increases. From the perspective of avoiding contact between the connection and the pixel electrode layer 40, the larger the distance between the edge of the projection area of ​​the connection layer in the orthographic projection direction and the edge of the projection area of ​​the isolation structure 31 in the orthographic projection direction, the better, and the processing difficulty is relatively small. Therefore, considering the above two aspects, the present application sets the minimum distance between the boundary of the connection layer in the orthographic projection direction and the boundary of the isolation structure 31 in the orthographic projection direction to l, l ≥ 2um.

[0082] Specifically, the distance l between the boundary of the connection layer in the orthographic projection direction and the boundary of the isolation structure 31 in the orthographic projection direction may be 2um, 2.3um, 2.5um, 2.8um, 3.0um, 3.5um, etc.

[0083] In some embodiments of the present invention, the material of at least a portion of the connection layer is the same as the material of the pixel electrode layer 40 .

[0084] Since the adhesion between the material of the pixel electrode layer 40 and the planar layer 20 and the isolation structure 31 is greater than the adhesion between the planar layer 20 and the isolation structure 31, setting the material of at least part of the connecting layer to be the same as that of the pixel electrode layer 40 can improve the adhesion between the planar layer 20 and the isolation structure 31.

[0085] In some embodiments, the material of the connection layer is completely the same as that of the pixel electrode layer 40 .

[0086] In some embodiments, the material of some connecting layers is the same as the material of the pixel electrode layer 40. For example, the material of 1 / 2 connecting layers may be the same as the material of the pixel electrode layer 40; the material of 1 / 3 connecting layers may be the same as the material of the pixel electrode layer 40; the material of 2 / 3 connecting layers may be the same as the material of the pixel electrode layer 40; the material of 3 / 4 connecting layers may be the same as the material of the pixel electrode layer 40; the material of 4 / 5 connecting layers may be the same as the material of the pixel electrode layer 40, etc.

[0087] In some embodiments, reference Figure 4-Figure 9 The display panel 100 further includes a driving circuit layer 60 . The driving circuit layer 60 is disposed on a side of the substrate 10 facing the planar layer 20 and is located between the substrate 10 and the planar layer 20 .

[0088] In some embodiments, reference Figure 4-Figure 9The display panel 100 further includes an electroluminescent layer 70 (EL layer), which is disposed on a side of the pixel defining layer 30 and the pixel material layer 41 away from the substrate 10 .

[0089] In some embodiments, reference Figure 4-Figure 9 The display panel 100 further includes a cathode layer 80 , which is disposed on a side of the electroluminescent layer 70 away from the substrate 10 .

[0090] The manufacturing process of the display panel 100 of the present invention is as follows: Step 1: preparing a driving circuit layer 60 on one side of the substrate 10; Step 2: preparing a flat layer 20 on a side of the driving circuit layer 60 away from the substrate 10; Step 3, preparing a pixel electrode layer 40 on the side of the planar layer 20 away from the substrate 10, and then preparing a pixel material layer 41 on the side of the pixel electrode layer 40 away from the substrate 10, and then etching an opening area on the pixel electrode layer 40 and the pixel material layer 41, the opening area penetrates the pixel electrode layer 40 and the pixel material layer 41, and exposes the planar layer 20; Step 4, etching the groove 51 in the above embodiment in the exposed flat layer 20 in the opening area; or, preparing the connection layer in the above embodiment in the exposed flat layer 20 in the opening area; Step 5: preparing a pixel defining layer 30 in the opening area and on the side of the pixel material layer 41 away from the substrate 10; Step 6: preparing an electroluminescent layer 70 on a side of the pixel defining layer 30 away from the substrate 10; Step 7: Prepare a cathode layer 80 on the side of the electroluminescent layer 70 away from the substrate 10 .

[0091] A display device according to an embodiment of the second aspect of the present invention includes the display panel 100 in the above embodiment.

[0092] According to the display device of the embodiment of the present invention, by adopting the absorption display panel 100 in the above embodiment, good display of the display device is ensured and the service life of the display device is extended.

[0093] In some embodiments, the display device can be: a mobile phone, a tablet computer, a television, a display, a laptop computer, a digital photo frame, a navigator, a smart watch, a fitness wristband, a personal digital assistant, or any other product or component with a display function. Other essential components of the display device should be understood by those of ordinary skill in the art, and will not be described in detail here, nor should they be used as limitations on the present disclosure. In addition, since the principle of solving the problem by the display device is similar to the principle of solving the problem by the above-mentioned display panel 100, the implementation of the display device can refer to the embodiment of the above-mentioned display panel 100, and will not be described in detail here.

[0094] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0095] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0096] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or means that the first feature is lower in level than the second feature.

[0097] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0098] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A display panel, characterized in that: include: substrate; A flat layer, disposed on one side of the substrate; A pixel defining layer is disposed on a side of the flat layer away from the substrate, the pixel defining layer comprises a plurality of isolation structures disposed at intervals, adjacent isolation structures form a pixel opening region; the pixel opening region is provided with a pixel electrode layer and a pixel material layer; A connecting portion is provided between the isolation structure and the planar layer.

2. The display panel according to claim 1, characterized in that: The connecting portion includes matching protrusions and grooves, one of the flat layer and the isolation structure is provided with the protrusion, and the other is provided with the groove.

3. The display panel according to claim 2, characterized in that: The groove is arranged on a side of the flat layer facing the isolation structure, and the protrusion is arranged on a side of the isolation structure facing the flat layer.

4. The display panel according to claim 3, characterized in that: There are a plurality of grooves, which are arranged at intervals; there are a plurality of protrusions, which are arranged at intervals and correspond one to one with the grooves.

5. The display panel according to claim 4, characterized in that: The maximum width of the groove in the length direction of the flat layer is w, w≤2.5um; The maximum spacing of the grooves in the length direction of the flat layer is p, p≤2um; The depth of the groove in the orthographic projection direction is h, the thickness of the flat layer is d, and 1 / 3≤h / d≤1.

6. The display panel according to claim 2, characterized in that: The groove has a maximum cross section in a direction perpendicular to the orthographic projection direction, and the size of the maximum cross section is greater than the size of the cross section of the opening end of the groove.

7. The display panel according to claim 6, characterized in that: The cross-sectional shape of the groove along the orthographic projection direction is a trapezoid, and the size of the closed end of the groove is larger than the size of the open end of the groove.

8. The display panel according to claim 2, characterized in that: The projection area of ​​the groove in the orthographic projection direction is located within the projection area of ​​the isolation structure in the orthographic projection direction.

9. The display panel according to claim 1, characterized in that: The connecting portion is a connecting layer, and the connection strength between the connecting layer and the planar layer and the isolation structure is greater than the connection strength between the planar layer and the isolation structure.

10. The display panel according to claim 9, characterized in that: One side of the connection layer is connected to a side of the planar layer facing the isolation structure, and the other side of the connection layer is connected to a side of the isolation structure facing the planar layer.

11. The display panel according to claim 10, characterized in that: The projection area of ​​the connection layer in the orthographic projection direction is located within the projection area of ​​the isolation structure in the orthographic projection direction.

12. The display panel according to claim 11, characterized in that: The minimum distance between the boundary of the connection layer in the orthographic projection direction and the boundary of the isolation structure in the orthographic projection direction is l, and l≥2um.

13. The display panel according to claim 9, characterized in that: The material of at least a portion of the connection layer is the same as that of the pixel electrode layer.

14. A display device, characterized in that: A display panel comprising any one of claims 1-13.

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