Display panel and display device

Abstract

According to the display panel and the display device provided by the embodiment of the invention, one end, close to the first pixel definition part, of the side wall of the isolation column is in contact with one end, close to the isolation column, of the side wall of the first pixel definition part, so that the included angle can be formed between the side wall of the isolation column and the side wall of the first pixel definition part; the included angle between the isolation column and the pixel definition layer is increased, so that when the packaging layer is deposited in the area close to the bottom of the isolation column, due to the fact that the included angle between the isolation column and the pixel definition layer is large, the deposition rate can be increased, gaps of the packaging layer at the position are avoided, and the risk that the packaging layer is broken in the bending process of the display panel is reduced; and the packaging stability is improved.

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] OLED (Organic Light-Emitting Diode) display devices are widely used due to their advantages such as low power consumption, fast response speed, wide viewing angle, self-luminescence, and flexibility. In order to improve efficiency and lifespan, existing OLED display devices will use laminated devices, which have the advantages of higher brightness, longer lifespan and lower power consumption. Specifically, an OLED display device using a laminated device refers to a device that sets multiple layers of light-emitting material layers, and sets a charge generation layer between the multiple layers of light-emitting material layers. Since the charge generation layer is a common layer, it will be set on the entire surface, resulting in that when the start-up voltages of sub-pixels of different luminous colors are close, the charges will migrate laterally in the common layer. When a sub-pixel of a certain luminous color is lit, it will cause sub-pixels of other colors to be lit. For example, when the green sub-pixel is lit, the red sub-pixel will be lit due to the lateral migration of electrons and holes in the common layer, which will cause display abnormality.

[0003] In order to solve the above problems, existing OLED display devices use isolation columns or isolation grooves to isolate the common layer to improve leakage. However, when using isolation columns, due to the limitations of the material and process of the isolation columns, the angle of the isolation columns is relatively gentle. When the encapsulation layer is deposited, due to the large difference in deposition rate at different locations, gaps will be formed in the bottom area of ​​the encapsulation layer close to the isolation columns. In the subsequent use of the OLED display device, it is easy to cause breakage here, which in turn leads to encapsulation failure.

[0004] Therefore, the existing OLED display device has a technical problem that the encapsulation layer is easily broken in the bottom area of ​​the isolation column, resulting in encapsulation failure. Summary of the invention

[0005] The embodiments of the present application provide a display panel and a display device, which are used to solve the technical problem that the encapsulation layer of the existing OLED display device is easily broken in the bottom area of ​​the isolation column, resulting in encapsulation failure.

[0006] In order to achieve the above objective, according to a first aspect of the present application, a display panel is provided, the display panel comprising:

[0007] substrate;

[0008] A pixel electrode layer, disposed on one side of the substrate;

[0009] A pixel definition layer, disposed on a side of the pixel electrode layer away from the substrate, the pixel definition layer comprising first pixel definition parts and pixel openings disposed between the first pixel definition parts;

[0010] An isolation column, disposed on a side of the first pixel definition portion away from the pixel electrode layer, wherein a lower surface of the isolation column contacts an upper surface of the first pixel definition portion;

[0011] A common layer, comprising a first common part and a second common part, wherein the first common part is disposed on the isolation column, the second common part is disposed on the bottom surface and the side wall of the pixel opening, and the first common part is disconnected from the second common part;

[0012] Wherein, one end of the side wall of the isolation column close to the first pixel defining portion contacts with one end of the side wall of the first pixel defining portion close to the isolation column.

[0013] Optionally, the projection of each side of the lower surface of the isolation column corresponding to the pixel opening on the substrate coincides with the projection of each side of the upper surface of the first pixel defining portion corresponding to the pixel opening on the substrate.

[0014] Optionally, an angle between a sidewall of the isolation column and a corresponding sidewall of the first pixel defining portion ranges from 70 degrees to 90 degrees.

[0015] Optionally, an angle between a side wall of the isolation column and a lower surface of the isolation column ranges from 110 degrees to 120 degrees.

[0016] Optionally, the display panel includes a first sub-pixel unit, a second sub-pixel unit, and a third sub-pixel unit of different luminous colors, the first sub-pixel unit and the second sub-pixel unit are cross-arranged in the same column, the first sub-pixel unit and the second sub-pixel unit are cross-arranged in the same row, the third sub-pixel unit and the first sub-pixel unit are located in two adjacent columns, and the third sub-pixel unit and the first pixel unit are located in two adjacent rows;

[0017] Among them, the first pixel definition part is arranged between the first sub-pixel unit and the third sub-pixel unit, the first pixel definition part is arranged between the second sub-pixel unit and the third sub-pixel unit, the isolation column includes a first isolation column and a second isolation column, the first isolation column is arranged between the first sub-pixel unit and the third sub-pixel unit, and the second isolation column is arranged between the second sub-pixel unit and the third sub-pixel unit.

[0018] Optionally, the projection area of ​​the first sub-pixel unit on the substrate is greater than the projection area of ​​the second sub-pixel unit on the substrate, the projection area of ​​the second sub-pixel unit on the substrate is greater than the projection area of ​​the third sub-pixel unit on the substrate, and the width of the first isolation column is greater than the width of the second isolation column.

[0019] Optionally, the pixel definition layer further includes a second pixel definition portion, the second pixel definition portion is disposed between the first sub-pixel unit and the second sub-pixel unit, and a width of an upper surface of the second pixel definition portion is greater than a width of an upper surface of the first pixel definition portion.

[0020] Optionally, the display panel further includes a supporting column, the supporting column is provided on part of the second pixel defining portion, the supporting column contacts an upper surface of the second pixel defining portion, and a gap exists between an edge of the supporting column and an edge of the second pixel defining portion.

[0021] Optionally, an angle between a side wall of the first pixel defining portion and a lower surface of the first pixel defining portion is smaller than an angle between a side wall of the second pixel defining portion and a lower surface of the second pixel defining portion.

[0022] According to a second aspect of the present application, a display device is provided, comprising a display panel as described in any one of the above embodiments.

[0023] An embodiment of the present application provides a display panel and a display device, wherein the display panel includes a substrate, a pixel electrode layer, a pixel definition layer, an isolation column and a common layer, wherein the pixel electrode layer is arranged on one side of the substrate, the pixel definition layer is arranged on a side of the pixel electrode layer away from the substrate, the pixel definition layer includes a first pixel definition portion and a pixel opening arranged between the first pixel definition portions, the isolation column is arranged on a side of the first pixel definition portion away from the pixel definition layer, the lower surface of the isolation column is in contact with the upper surface of the first pixel definition portion, the common layer is arranged on a side of the isolation column away from the pixel definition layer, the common layer includes a first common portion and a second common portion, the first common portion is arranged on the isolation column, the second common portion is arranged in the pixel opening, the first common portion is disconnected from the second common portion, wherein one end of the side wall of the isolation column close to the first pixel definition portion is in contact with one end of the side wall of the first pixel definition portion close to the isolation column. By making one end of the side wall of the isolation column close to the first pixel definition part contact with one end of the side wall of the first pixel definition part close to the isolation column, an angle can be formed by the side wall of the isolation column and the side wall of the first pixel definition part, thereby increasing the angle between the isolation column and the pixel definition layer. When the encapsulation layer is deposited in the bottom area close to the isolation column, the deposition rate can be increased due to the large angle between the isolation column and the pixel definition layer, thereby avoiding the formation of gaps in the encapsulation layer at this point, reducing the risk of breakage of the encapsulation layer during the bending of the display panel, and improving the encapsulation stability.

[0024] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0026] 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 figure numbers represent the same parts in the following description.

[0027] Figure 1 It is a schematic diagram of the first comparative display device provided in the embodiment of the present application.

[0028] Figure 2 A schematic diagram of a second comparative display device provided in an embodiment of the present application.

[0029] Figure 3 A schematic plan view of a display panel provided in an embodiment of the present application.

[0030] Figure 4 for Figure 3 A1-A2 cross-sectional view of the display panel in FIG.

[0031] Figure 5 for Figure 3 B1-B2 cross-sectional view of the display panel in FIG.

[0032] Figure 6 A schematic diagram of the structure of a display panel corresponding to each step of the method for preparing a display panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than 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.

[0034] In order to illustrate the principle of the technical problem of the embodiment of the present application, some comparative display devices are provided. It is understandable that these comparative display devices cannot be used as the prior art of the present application. Figure 1As shown, a comparative display device includes an anode 11, a pixel definition film 12, a hole transport film 13, a first green light-emitting film 141, a first red light-emitting film 142, an N-type charge generation film 15, a P-type charge generation film 16, a second green light-emitting film 171, a second red light-emitting film 172 and an electron transport film 18, from Figure 1 As can be seen in the figure, each sub-pixel of a luminous color includes two layers of luminous films, which makes the sub-pixel of each luminous color brighter and longer-lasting, and consumes less power than the display device. Figure 1 It can be seen that the hole transport film 13, the N-type charge generation film 15, the P-type charge generation film 16 and the electron transport film 18 are all common layers. When the green sub-pixel is lit, the particles in the hole transport film 13, the N-type charge generation film 15, the P-type charge generation film 16 and the electron transport film 18 will move laterally, that is, the electrons and holes in the common layer will migrate laterally. When the turn-on voltages of the green sub-pixel and the red sub-pixel are similar, the originally closed red sub-pixel will be lit, resulting in display abnormality.

[0035] In order to solve the above problems, another contrast display device is provided, such as Figure 2 As shown, the comparative display device includes a substrate 21, an anode 11, a pixel definition film 12, a hole transport film (not shown), a first green light-emitting film (not shown), a first red light-emitting film (not shown), an N-type charge generation film (not shown), a P-type charge generation film (not shown), a second green light-emitting film (not shown), a second red light-emitting film (not shown), an electron transport film (not shown), an isolation structure 22, a support structure 23 and a packaging structure 24. By setting the isolation structure 22, the isolation structure 22 isolates the common layer, thereby improving the leakage current, but from Figure 2 It can be seen that in the bottom area of ​​the isolation structure 22, there are some pores 25 in the encapsulation structure 24. Here, when depositing inorganic materials, there is no obstruction in the upper area and the plane area of ​​the isolation structure, so the deposition rate is fast. Since the bottom area of ​​the isolation structure is a chamfer, the angle a formed by the isolation structure and the pixel definition film is small, and it is difficult for the material to be deposited in the bottom area of ​​the isolation structure, resulting in large differences in deposition rates in different areas, and pores will be formed in the bottom area of ​​the isolation structure. In contrast, during the use of the display device, there will be certain bends. For other flexible display devices such as folding display devices, the number and amplitude of the bends will be greater, resulting in the encapsulation structure at the bottom area of ​​the isolation structure being prone to breakage, which in turn leads to encapsulation failure. Therefore, the existing OLED display device has a technical problem that the encapsulation layer is prone to breakage in the bottom area of ​​the isolation column, resulting in encapsulation failure.

[0036] In view of the above technical problems, the embodiments of the present application provide a display panel and a display device to solve the above technical problems.

[0037] Figure 3 A schematic plan view of a display panel provided in an embodiment of the present application. Figure 4 for Figure 3 A1-A2 cross-sectional view of the display panel in FIG. Figure 5 for Figure 3 B1-B2 cross-sectional view of the display panel in FIG. Figure 6 A schematic diagram of the structure of a display panel corresponding to each step of the method for preparing a display panel provided in an embodiment of the present application.

[0038] The present application embodiment provides a display panel, such as Figures 3 to 5 As shown, the display panel 3 includes a substrate 31, a pixel electrode layer 32, a pixel definition layer 33, an isolation column 38 and a common layer 34; the pixel electrode layer 32 is arranged on one side of the substrate 31; the pixel definition layer 33 is arranged on the side of the pixel electrode layer 32 away from the substrate 31, and the pixel definition layer 33 includes a first pixel definition part 331 and a pixel opening 33a arranged between the first pixel definition part 331; the isolation column 38 is arranged on the side of the first pixel definition part 331 away from the pixel electrode layer 32, and the lower surface 382 of the isolation column 38 is in contact with the upper surface 331b of the first pixel definition part 331; the common layer 34 includes a first common part 34a and a second common part 34b, the first common part 34a is arranged on the isolation column 38, and the second common part 34b is arranged on the bottom surface and side wall of the pixel opening 33a, and the first common part 34a is disconnected from the second common part 34b;

[0039] One end of the side wall 381 of the isolation column 38 close to the first pixel defining portion 331 contacts one end of the side wall 331 a of the first pixel defining portion 331 close to the isolation column 38 .

[0040] An embodiment of the present application provides a display panel, which forms an angle with the side wall of the first pixel defining portion through the side wall of the isolation column by making one end of the side wall of the first pixel defining portion close to the isolation column in contact with the side wall of the first pixel defining portion, thereby increasing the angle between the isolation column and the pixel defining layer. When the encapsulation layer is deposited in the bottom area close to the isolation column, the deposition rate can be increased due to the large angle between the isolation column and the pixel defining layer, thereby avoiding the formation of gaps in the encapsulation layer at this location, reducing the risk of breakage of the encapsulation layer during the bending process of the display panel, and improving the encapsulation stability.

[0041] Specifically, the display panel also includes a driving circuit layer, which is arranged between the substrate and the pixel electrode layer. The driving circuit layer includes an active layer, a gate insulating layer, a gate layer, an interlayer insulating layer, a source and drain layer and a planarization layer arranged in sequence.

[0042] Specifically, the end of the side wall 381 of the isolation column 38 close to the first pixel defining portion 331 refers to the connection between the side wall 381 of the isolation column 38 and the lower surface 382 of the isolation column 38, and the end of the side wall 331a of the first pixel defining portion 331 close to the isolation column 38 refers to the connection between the side wall 331a corresponding to the pixel opening 33a in the first pixel defining portion 331 and the upper surface 331b of the first pixel defining portion 331.

[0043] Specifically, it can be understood that, without considering factors such as curvature, the isolation column can be regarded as including only four side walls in different directions, wherein the side walls in two directions are arranged opposite to the pixel openings on both sides, and the orthographic projections of the side walls in the other two directions are basically parallel to the lines connecting the pixel openings on both sides (not limited to parallel, and can be understood as having a certain angle with the pixel openings on both sides). In the embodiment of the present application, the side walls of the isolation column corresponding to the pixel openings refer to the side walls in the isolation column that are arranged opposite to the pixel openings on both sides.

[0044] Specifically, it can be understood that since the pixel definition layer is set as a whole layer to form multiple pixel openings, the pixel definition layer will only slope at the location where the pixel openings are set, while in other areas where no pixel openings are set, the pixel definition layer will not slope. Therefore, the two side walls in the isolation column that are parallel to the line connecting the pixel openings on both sides will be set in the flat area of ​​the pixel definition layer, and will form an angle with the upper surface of the pixel definition layer, but will not form an angle with the side walls of the pixel definition layer.

[0045] Specifically, Figure 4 As shown, the common layer 34 includes a hole transport layer 341, an N-type charge generation layer 342, a P-type charge generation layer 343, an electron transport layer 344 and a common electrode layer 345; in the display area, each sub-pixel unit includes a common electrode layer, and in order to make the common electrode layer uninterrupted, only part of the common electrode layer is disconnected at the position where the isolation column is set, and the common electrode layers in other areas are connected together, and accordingly, the hole transport layer, the N-type charge generation layer, the P-type charge generation layer and the electron transport layer are set in an even layer, and are only disconnected at the position where the isolation column is set.

[0046] Specifically, Figure 4 , Figure 5 As shown, the display panel 3 also includes a first light-emitting sublayer 35 and a second light-emitting sublayer 36. The first light-emitting sublayer 35 is arranged between the hole transport layer 341 and the N-type charge generation layer 342, and the second light-emitting sublayer 36 is arranged between the P-type charge generation layer 343 and the electron transport layer 344. The first light-emitting sublayer 35 includes a first red light-emitting sublayer 351, a first green light-emitting sublayer 352, and a first blue light-emitting sublayer 353, and the second light-emitting sublayer 36 includes a second red light-emitting sublayer 361, a second green light-emitting sublayer 362, and a second blue light-emitting sublayer 363.

[0047] Specifically, Figure 4 As shown, the display panel 3 also includes an encapsulation layer 37, which is arranged on the side of the common layer 34 away from the pixel definition layer 33. The encapsulation layer 37 includes a first inorganic layer 371, an organic layer 372 and a second inorganic layer 373. The first inorganic layer 371 is arranged on the side of the common layer 34 away from the pixel definition layer 33, the organic layer 372 is arranged on the side of the first inorganic layer 371 away from the common layer 34, and the second inorganic layer 373 is arranged on the side of the organic layer 372 away from the first inorganic layer 371.

[0048] Specifically, it can be understood that since a common layer, a first light-emitting sublayer and a second light-emitting sublayer are provided in each pixel opening 33a, the pixel opening 33a cannot be seen, and the shape and position of the pixel opening can be determined based on the shapes and positions of the common layer, the first light-emitting sublayer and the second light-emitting sublayer.

[0049] In some embodiments, Figure 3 , Figure 4 As shown, the projection of each side edge of the lower surface 382 of the isolation column 38 corresponding to the pixel opening 33a on the substrate 31 coincides with the projection of each side edge of the upper surface 331b of the first pixel definition portion 331 on the substrate 31. By making the projection of each side edge of the lower surface of the isolation column corresponding to the pixel opening on the substrate coincide with the projection of each side edge of the upper surface of the first pixel definition portion on the substrate, both side walls of the isolation column and both side walls of the first pixel definition portion form an angle, thereby increasing the angle between the isolation column and the pixel definition layer, so that when the encapsulation layer is deposited in the bottom area close to the isolation column, due to the larger angle between the isolation column and the pixel definition layer, the deposition rate can be increased, thereby avoiding the formation of gaps in the encapsulation layer at this location, reducing the risk of the encapsulation layer breaking during the bending process of the display panel, and improving the encapsulation stability.

[0050] Specifically, it can be understood that since the isolation columns are arranged at intervals and the pixel definition layer is arranged on the entire surface, the projection of each side of the corresponding pixel opening in the lower surface of the isolation column defined here on the substrate and the overlap of the projection of each side of the corresponding pixel opening in the upper surface of the first pixel definition part on the substrate are based on the description that the divided first pixel definition part has a certain width, but in actual design, each first pixel definition part of the pixel definition layer is interconnected with other parts, and there is no actual boundary. The width of the first pixel definition part is not limited, and it has different widths according to different division methods.

[0051] Specifically, the above embodiment is described by taking the projection of each side of the corresponding pixel opening in the lower surface of the isolation column on the substrate and the projection of each side of the corresponding pixel opening in the upper surface of the first pixel definition part on the substrate as an example. However, the embodiment of the present application is not limited to this, and only one side of the lower surface of the isolation column can be overlapped with the side of the first pixel definition part. For example, taking two pixel openings of the red sub-pixel unit and the green sub-pixel unit as an example, on the side close to the pixel opening of the red sub-pixel unit, the projection of the side of the pixel opening of the red sub-pixel unit in the lower surface of the isolation column corresponding to the pixel opening of the red sub-pixel unit on the substrate coincides with the projection of the side of the pixel opening of the red sub-pixel unit in the upper surface of the first pixel definition part on the substrate, and the projection of the side of the pixel opening of the green sub-pixel unit in the lower surface of the isolation column corresponding to the pixel opening of the green sub-pixel unit on the substrate does not coincide with the projection of the side of the pixel opening of the green sub-pixel unit in the upper surface of the first pixel definition part on the substrate.

[0052] In some embodiments, Figure 4 As shown, the angle b between the side wall 381 of the isolation column 38 and the corresponding side wall 331a of the first pixel definition part 331 is in the range of 70 to 90 degrees. By making the angle between the side wall of the isolation column and the corresponding side wall of the first pixel definition part in the range of 70 to 90 degrees, the opening degree of the angle formed by the isolation column and the first pixel definition part can be increased, so that when depositing inorganic materials, the deposition rate of the bottom area of ​​the isolation column can be accelerated, so that the deposition rate of the inorganic material in each area of ​​the isolation column is similar or even the same, avoiding the encapsulation layer from forming pores in the bottom area of ​​the isolation column, thereby reducing the risk of the encapsulation layer breaking during the bending process of the display panel and improving the encapsulation stability.

[0053] Specifically, an angle between a side wall of the isolation column and a side wall of the corresponding first pixel defining portion is greater than 70 degrees and less than 90 degrees.

[0054] Specifically, compared with the comparative display device in which the angle between the isolation structure and the pixel definition film is greater than 60 degrees and less than 70 degrees, the present application makes the angle between the side wall of the isolation column and the corresponding side wall of the first pixel definition part range from 70 degrees to 90 degrees, thereby increasing the opening degree of the angle formed by the side wall of the isolation column and the side wall of the first pixel definition part, changing the film forming topography of the inorganic layer in the encapsulation layer, avoiding the formation of pores when the inorganic material is formed at the bottom of the isolation column, avoiding the breakage of the encapsulation layer, and improving the encapsulation stability.

[0055] In some embodiments, Figure 4 As shown, the angle c between the sidewall 381 of the isolation column 38 and the lower surface 382 of the isolation column 38 is in the range of 110 to 120 degrees. By making the angle between the sidewall of the isolation column and the lower surface of the isolation column in the range of 110 to 120 degrees, the isolation column can isolate the common layer to prevent leakage.

[0056] In some embodiments, Figure 3 , Figure 4 As shown, the display panel 3 includes a first sub-pixel unit 301, a second sub-pixel unit 302 and a third sub-pixel unit 303 of different luminous colors, the first sub-pixel unit 301 and the second sub-pixel unit 302 are cross-arranged in the same column, the first sub-pixel unit 301 and the second sub-pixel unit 302 are cross-arranged in the same row, the third sub-pixel unit 303 and the first sub-pixel unit 301 are located in two adjacent columns, and the third sub-pixel unit 303 and the first pixel unit 301 are located in two adjacent rows;

[0057] The first pixel definition part 331 is disposed between the first sub-pixel unit 301 and the third sub-pixel unit 303, the first pixel definition part 331 is disposed between the second sub-pixel unit 302 and the third sub-pixel unit 303, the isolation column 38 includes a first isolation column 411 and a second isolation column 412, the first isolation column 411 is disposed between the first sub-pixel unit 301 and the third sub-pixel unit 303, and the second isolation column 412 is disposed between the second sub-pixel unit 302 and the third sub-pixel unit 303. By disposing the first isolation column between the first sub-pixel unit and the third sub-pixel unit, and the second isolation column between the second sub-pixel unit and the third sub-pixel unit, the common layer between the first sub-pixel unit and the third sub-pixel unit can be isolated, and the common layer between the second sub-pixel unit and the third sub-pixel unit can be isolated, so as to avoid poor display caused by leakage.

[0058] Specifically, the pixel opening 33a includes a first pixel opening 421 , a second pixel opening 422 and a third pixel opening 423 . The first sub-pixel unit 301 is disposed in the first pixel opening 421 , the second sub-pixel unit 302 is disposed in the second pixel opening 422 , and the third sub-pixel unit 303 is disposed in the third pixel opening 423 .

[0059] It can be understood that in order to show the pixel openings, the boundaries of each pixel opening are represented by solid lines, but in reality, the pixel definition layer is set on the entire surface, and openings are provided in the area where the sub-pixel units are provided. Therefore, except for the area where the sub-pixel units are provided and there is no pixel definition layer, the pixel definition layers in other areas will be connected together and there will be no obvious boundaries.

[0060] In some embodiments, Figure 3As shown, the projection area of ​​the first sub-pixel unit 301 on the substrate 31 is larger than the projection area of ​​the second sub-pixel unit 302 on the substrate 31, the projection area of ​​the second sub-pixel unit 302 on the substrate 31 is larger than the projection area of ​​the third sub-pixel unit 303 on the substrate 31, and the width L1 of the first isolation column 411 is larger than the width L2 of the second isolation column 412. By making the projection area of ​​the first sub-pixel unit on the substrate larger than the projection area of ​​the second sub-pixel unit on the substrate, the projection area of ​​the second sub-pixel unit on the substrate is larger than the projection area of ​​the third sub-pixel unit on the substrate, and the width of the first isolation column is larger than the width of the second isolation column, the isolation effect of the first isolation column on the common layer between the first sub-pixel unit and the third sub-pixel unit is similar to or even the same as the isolation effect of the second isolation column on the common layer between the second sub-pixel unit and the third sub-pixel unit, thereby improving leakage current and avoiding poor display.

[0061] Specifically, the luminous colors of the first sub-pixel unit 301, the second sub-pixel unit 302 and the third sub-pixel unit are blue, red and green respectively, that is, the first sub-pixel unit is a blue sub-pixel unit, the second sub-pixel unit is a red sub-pixel unit, and the third sub-pixel unit is a green sub-pixel unit.

[0062] Specifically, due to the different luminous efficiencies of different luminescent materials, the area of ​​the blue sub-pixel unit will generally be larger than the area of ​​the red sub-pixel unit, and the area of ​​the red sub-pixel unit will be larger than the area of ​​the green sub-pixel unit. Accordingly, the width of the first isolation column can be larger than the width of the second isolation column.

[0063] Specifically, Figure 3 2 shows an arrangement of pixel units of a display panel. It can be understood that when the display panel adopts other pixel arrangements, the design of the isolation column in the present application can also be adopted.

[0064] Specifically, the lengths of the first isolation column and the second isolation column may be determined according to the spacing between adjacent sub-pixel units. For example, the length of the first isolation column is equal to the length of the second isolation column.

[0065] In some embodiments, Figures 3 to 5As shown, the pixel definition layer 33 further includes a second pixel definition portion 332, the second pixel definition portion 332 is disposed between the first sub-pixel unit 301 and the second sub-pixel unit 302, and the width L4 of the upper surface of the second pixel definition portion 332 is greater than the width L3 of the upper surface of the first pixel definition portion 331. By making the width of the upper surface of the second pixel definition portion greater than the width of the upper surface of the first pixel definition portion, the isolation column and the side wall of the first pixel definition portion can form an angle without changing the size of each sub-pixel unit, so that each sub-pixel unit in the display panel can reach a predetermined panel, and the opening angle of the first pixel definition portion can be enlarged, thereby increasing the light output angle of the pixel unit and improving the light efficiency.

[0066] In some embodiments, Figures 3 to 5 As shown, the display panel 3 further includes a support column 39, and the support column 39 is provided on part of the second pixel definition part 332, and the support column 39 contacts the upper surface of the second pixel definition part 332, and there is a gap between the edge of the support column 39 and the edge of the second pixel definition part 332. By providing the support column, when forming each film layer, components such as a mask can be supported to avoid damaging the display panel, and there is a gap between the support column and the edge of the second pixel definition part, so that each common layer can be overlapped on the support column and the side wall of the second pixel definition part, thereby avoiding the common layer from being broken.

[0067] In some embodiments, Figures 3 to 5 As shown, the angle d between the side wall of the first pixel definition part 331 and the lower surface of the first pixel definition part 331 is smaller than the angle e between the side wall of the second pixel definition part 332 and the lower surface of the second pixel definition part 332. By making the angle between the side wall of the first pixel definition part and the lower surface of the first pixel definition part smaller than the angle between the side wall of the second pixel definition part and the lower surface of the second pixel definition part, the width of the upper surface of the first pixel definition part can be reduced without changing the bottom area of ​​the first pixel definition part and the second pixel definition part, so that the isolation column and the side wall of the first pixel definition part can form an angle, and the angle between the isolation column and the pixel definition layer is increased, so that when the encapsulation layer is deposited in the bottom area close to the isolation column, the deposition rate can be increased due to the larger angle between the isolation column and the pixel definition layer, thereby avoiding the formation of gaps in the encapsulation layer at this location, reducing the risk of the encapsulation layer breaking during the bending process of the display panel, and improving the encapsulation stability.

[0068] Specifically, the above embodiment is described by taking the angle between the side wall of the first pixel definition part and the lower surface of the first pixel definition part as smaller than the angle between the side wall of the second pixel definition part and the lower surface of the second pixel definition part, but the embodiments of the present application are not limited to this. The angle between the side wall of the first pixel definition part and the lower surface of the first pixel definition part can be equal to the angle between the side wall of the second pixel definition part and the lower surface of the second pixel definition part, and the width of the upper surface of the first pixel definition part is smaller than the width of the upper surface of the second pixel definition part. This design can reduce the spacing between the first pixel definition parts between adjacent sub-pixel units and improve the aperture ratio.

[0069] Specifically, it can be seen that an isolation column is provided between the first sub-pixel unit and the third sub-pixel unit, an isolation column is provided between the second sub-pixel unit and the third sub-pixel unit, and no isolation column is provided between the first sub-pixel unit and the second sub-pixel unit. This is based on the large difference between the start-up voltage of the first sub-pixel unit and the start-up voltage of the second sub-pixel unit, and is designed to avoid disconnecting the common layers and the pixel definition layer. Therefore, although no isolation column is provided between the first sub-pixel unit and the second sub-pixel unit, display abnormality will not be caused by leakage. In addition, the isolation columns are not connected, so that the common layers and the pixel definition layers only have openings, and are not disconnected into multiple spaced parts, so that the potential of each part of the common electrode layer is consistent, and there is no need for multiple input terminals to input signals.

[0070] Specifically, the material of the isolation column includes negative photoresist.

[0071] Specifically, the above-mentioned embodiments have described the display panel in detail from the perspective of each film layer and the arrangement between each film layer. It can be understood that when there is no conflict between the embodiments, the embodiments can be combined. For example, the projection of each side edge of the pixel opening corresponding to the lower surface of the isolation column on the substrate coincides with the projection of each side edge of the pixel opening corresponding to the upper surface of the first pixel defining portion on the substrate, and the angle between the side wall of the isolation column and the corresponding side wall of the first pixel defining portion is in the range of 70 degrees to 90 degrees.

[0072] At the same time, an embodiment of the present application provides a method for preparing a display panel, and the method for preparing a display panel includes:

[0073] A substrate is provided, and a pixel electrode layer and a pixel definition layer are sequentially formed on the substrate, and isolation columns and support columns are formed on the pixel definition layer; the structure of the display panel corresponding to this step is as follows Figure 6 As shown in (a);

[0074] A first luminous sublayer, a second luminous sublayer and a common layer are formed on the isolation column; the structure of the display panel corresponding to this step is as follows Figure 6 As shown in (b);

[0075] An encapsulation layer is formed on the common layer; the structure of the display panel corresponding to this step is as follows Figure 4 and Figure 5 shown.

[0076] Specifically, the step of forming an encapsulation layer on the common layer includes depositing a first inorganic layer on the common layer by a plasma enhanced chemical vapor deposition process, forming an organic layer on the first inorganic layer by an inkjet printing process, and forming a second inorganic layer on the organic layer by a plasma enhanced chemical vapor deposition process.

[0077] At the same time, an embodiment of the present application provides a display device, which includes a display panel as described in any of the above embodiments.

[0078] Specifically, the display panel includes an organic light emitting diode display panel.

[0079] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0080] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0081] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0082] The above are only 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 pixel electrode layer, disposed on one side of the substrate; A pixel definition layer, disposed on a side of the pixel electrode layer away from the substrate, the pixel definition layer comprising first pixel definition parts and pixel openings disposed between the first pixel definition parts; an isolation column, disposed on a side of the first pixel definition portion away from the pixel electrode layer, wherein a lower surface of the isolation column contacts an upper surface of the first pixel definition portion; A common layer, comprising a first common part and a second common part, wherein the first common part is disposed on the isolation column, the second common part is disposed on the bottom surface and the side wall of the pixel opening, and the first common part is disconnected from the second common part; Wherein, one end of the side wall of the isolation column close to the first pixel defining portion contacts with one end of the side wall of the first pixel defining portion close to the isolation column.

2. The display panel according to claim 1, characterized in that: The projections of the side edges of the lower surface of the isolation column corresponding to the pixel opening on the substrate coincide with the projections of the side edges of the upper surface of the first pixel defining portion corresponding to the pixel opening on the substrate.

3. The display panel according to claim 1, characterized in that: The included angle between the sidewall of the isolation column and the corresponding sidewall of the first pixel defining portion is in a range of 70 degrees to 90 degrees.

4. The display panel according to claim 1, characterized in that: The included angle between the side wall of the isolation column and the lower surface of the isolation column ranges from 110 degrees to 120 degrees.

5. The display panel according to any one of claims 1 to 4, characterized in that: The display panel comprises a first sub-pixel unit, a second sub-pixel unit and a third sub-pixel unit of different luminous colors, wherein the first sub-pixel unit and the second sub-pixel unit are cross-arranged in the same column, the first sub-pixel unit and the second sub-pixel unit are cross-arranged in the same row, the third sub-pixel unit and the first pixel unit are located in two adjacent columns, and the third sub-pixel unit and the first pixel unit are located in two adjacent rows; Among them, the first pixel definition part is arranged between the first sub-pixel unit and the third sub-pixel unit, the first pixel definition part is arranged between the second sub-pixel unit and the third sub-pixel unit, the isolation column includes a first isolation column and a second isolation column, the first isolation column is arranged between the first sub-pixel unit and the third sub-pixel unit, and the second isolation column is arranged between the second sub-pixel unit and the third sub-pixel unit.

6. The display panel according to claim 5, characterized in that: The projection area of ​​the first sub-pixel unit on the substrate is greater than the projection area of ​​the second sub-pixel unit on the substrate, the projection area of ​​the second sub-pixel unit on the substrate is greater than the projection area of ​​the third sub-pixel unit on the substrate, and the width of the first isolation column is greater than the width of the second isolation column.

7. The display panel according to claim 5, characterized in that: The pixel definition layer further includes a second pixel definition portion, which is disposed between the first sub-pixel unit and the second sub-pixel unit, and a width of an upper surface of the second pixel definition portion is greater than a width of an upper surface of the first pixel definition portion.

8. The display panel according to claim 7, characterized in that: The display panel further includes a support column, which is disposed on part of the second pixel definition portion and contacts an upper surface of the second pixel definition portion, and a gap exists between an edge of the support column and an edge of the second pixel definition portion.

9. The display panel according to claim 7, characterized in that: An included angle between the side wall of the first pixel defining portion and the lower surface of the first pixel defining portion is smaller than an included angle between the side wall of the second pixel defining portion and the lower surface of the second pixel defining portion.

10. A display device, characterized in that: Comprising the display panel as claimed in any one of claims 1 to 9.

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