Display panel, preparation method thereof and display device

Abstract

The invention relates to a display panel, a preparation method thereof and a display device. The display panel comprises a pixel limiting structure, the pixel limiting structure is provided with a protruding structure, and the protruding structure defines a plurality of pixel openings; the plurality of pixels are correspondingly arranged in the plurality of pixel openings; each pixel comprises a first electrode, a light-emitting function part and a second electrode which are stacked; wherein the convex structure comprises a conductive part and an insulating part; the conductive part is electrically connected with the first electrode of the pixel; and an insulating part is arranged between any two adjacent pixels. Therefore, equivalently, the conductive parts of the convex structures transmit power supply signals, and the insulating parts of the convex structures play an insulating role between adjacent pixels. Thus, the protruding structures can play a role in insulation while having a conductive function, crosstalk between adjacent pixels is avoided, and the display effect 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 method for preparing the same, and a display device. Background Art

[0002] OLED (Organic Light Emitting Diode) display panel is one of the hot topics in the current display panel research field. Compared with liquid crystal display panels, OLED display panels have the advantages of low energy consumption, low cost, self-luminescence, wide viewing angle and fast response speed. However, the current OLED display panels have the problem of poor display effect. Summary of the invention

[0003] Based on this, it is necessary to provide a display panel and a method for manufacturing the same, and a display device to address at least one of the above problems.

[0004] In a first aspect, an embodiment of the present application provides a display panel, the display panel comprising:

[0005] A pixel defining structure; a convex structure is disposed on the pixel defining structure, and the convex structure defines a plurality of pixel openings; and

[0006] A plurality of pixels are arranged in the plurality of pixel openings correspondingly; the pixels include a first electrode, a light emitting functional portion, and a second electrode which are stacked;

[0007] Wherein, the protruding structure includes a conductive part and an insulating part; the conductive part is electrically connected to the first electrode of the pixel; and the insulating part is provided between any two adjacent pixels.

[0008] The display panel provided by the embodiment of the present application is provided with a protruding structure on a pixel defining structure, and a pixel opening for accommodating a pixel is defined by the protruding structure and the pixel defining structure. The protruding structure further includes a conductive portion and an insulating portion, the conductive portion is electrically connected to the first electrode of the pixel, and an insulating portion is provided between any two adjacent pixels. In this way, it is equivalent to allowing the conductive portion of the protruding structure to transmit a power signal, and the insulating portion of the protruding structure plays an insulating role between adjacent pixels. In this way, the protruding structure can not only have a conductive function, but also play an insulating role, avoiding crosstalk between adjacent pixels and improving the display effect.

[0009] In one embodiment, the orthographic projection of the conductive portion on the pixel defining structure does not overlap with the orthographic projection of the insulating portion on the pixel defining structure;

[0010] Optionally, an orthographic projection of the conductive portion on the pixel defining structure is adjacent to an orthographic projection of the insulating portion on the pixel defining structure;

[0011] Optionally, the insulating portion and the pixel defining structure are an integrated structure;

[0012] Optionally, the conductive portion is flush with an upper surface of the insulating portion;

[0013] Optionally, the conductive portion serves as a side wall of the pixel opening and is electrically connected to the first electrode of the corresponding pixel.

[0014] In this way, the structure of the protrusion structure can be made simple and easy to manufacture.

[0015] In one embodiment, the display panel further includes:

[0016] An isolator is disposed on the protruding structure; the orthographic projection of the isolator on the pixel defining structure covers the orthographic projection of the protruding structure on the pixel defining structure;

[0017] Optionally, the isolator is an insulating member.

[0018] In this way, the insulator and the protruding structure can together form a partition structure. When vapor-depositing pixels, the insulator and the protruding structure can isolate the vapor-deposited material inside the pixel opening from the vapor-deposited material outside the pixel opening, so that pixels of different colors can be formed by repeated vapor deposition and etching without FMM. In this way, on the one hand, it is not only beneficial to improve the PPI of the display panel, but also beneficial to improve the vapor deposition yield; on the other hand, it can improve the problem of chromatic impurity caused by cross-pixel leakage.

[0019] In one embodiment, the isolator comprises:

[0020] A main body is disposed on the protruding structure; an orthographic projection of the main body on the pixel defining structure coincides with an orthographic projection of the protruding structure on the pixel defining structure;

[0021] The first edge portion and the second edge portion are respectively arranged on both sides of the main body along the first direction; the orthographic projection of the first edge portion on the pixel defining structure and the orthographic projection of the second edge portion on the pixel defining structure are respectively located on the bottom wall of the pixel opening on both sides of the convex structure; the first direction is perpendicular to the thickness direction of the pixel defining structure and the extension direction of the isolator;

[0022] Wherein, a size of the first edge portion along the first direction is equal to a size of the second edge portion along the first direction.

[0023] In this way, on the one hand, the difficulty of manufacturing the isolator can be reduced, and on the other hand, the structure of the isolator can be made more regular, thereby improving the stability of the display panel.

[0024] In one embodiment, the outer contour of the orthographic projection of the bottom surface of the isolator on the pixel definition structure is located at the periphery of the outer contour of the orthographic projection of the top surface of the isolator on the pixel definition structure;

[0025] Optionally, the width of the insulator gradually increases along the direction from one end of the insulator away from the pixel defining structure to the pixel defining structure; the width is the dimension of the positive projection of the insulator on the pixel defining structure in a direction perpendicular to the extension direction of the insulator.

[0026] In this way, the difficulty of manufacturing the insulator can be reduced.

[0027] In one embodiment, the display panel further comprises a first common electrode, which is disposed on a side of the isolator away from the pixel defining structure; the first common electrode is made of the same material as the first electrode;

[0028] Optionally, the display panel further comprises a vapor-deposited film layer, and the vapor-deposited film layer is arranged on a side of the first common electrode away from the isolator; the vapor-deposited film layer is made of the same material as the light-emitting functional part;

[0029] Optionally, the display panel further comprises a second common electrode, which is disposed on a side of the evaporated film layer away from the isolator; the second common electrode is made of the same material as the second electrode;

[0030] Optionally, the second electrode of the pixel is electrically connected to the first common electrode and / or the second common electrode.

[0031] In this way, all the second electrodes can be connected via the first common electrode or the second common electrode to form a surface electrode.

[0032] In one embodiment, the display panel further includes:

[0033] a planarization layer, the planarization layer being multiplexed as the pixel definition structure;

[0034] Optionally, the display panel further includes:

[0035] The array film layer is arranged on a side of the planarization layer away from the pixel; the conductive portion penetrates the pixel defining structure and is electrically connected to the first power signal line in the array film layer.

[0036] In this way, the planarization layer can be used as a pixel defining structure, which is beneficial to reducing the film layer structure and preparation process in the display panel.

[0037] In one embodiment, the plurality of pixel openings include a plurality of first pixel openings, a plurality of second pixel openings, and a plurality of third pixel openings; the plurality of pixels include a plurality of first sub-pixels, a plurality of second sub-pixels, and a plurality of third sub-pixels;

[0038] The plurality of first sub-pixels are correspondingly arranged in the plurality of first pixel openings, the plurality of second sub-pixels are correspondingly arranged in the plurality of second pixel openings, and the plurality of third sub-pixels are correspondingly arranged in the plurality of third pixel openings;

[0039] Optionally, the depth of the first pixel opening, the depth of the second pixel opening and the depth of the third pixel opening are all equal.

[0040] In this way, different pixels can be arranged in corresponding pixel openings, which is beneficial for making the shapes of pixels of different colors different.

[0041] In a second aspect, an embodiment of the present application provides a method for manufacturing a display panel, the method for manufacturing a display panel comprising:

[0042] providing a pixel defining structure;

[0043] A convex structure is formed on the pixel defining structure; the convex structure defines a plurality of pixel openings; the convex structure includes a conductive portion and an insulating portion, and the insulating portion is provided between any two adjacent pixel openings;

[0044] A plurality of pixels are formed on the pixel definition structure; the plurality of pixels are correspondingly arranged in the plurality of pixel openings; the pixel comprises a first electrode, a light emitting functional portion and a second electrode which are stacked, and the conductive portion is electrically connected to the first electrode.

[0045] The method for preparing a display panel provided in an embodiment of the present application is provided by providing a protruding structure on a pixel defining structure, and defining a pixel opening for accommodating pixels by the protruding structure and the pixel defining structure. The protruding structure further includes a conductive portion and an insulating portion, the conductive portion is electrically connected to the first electrode of the pixel, and an insulating portion is provided between any two adjacent pixels. In this way, it is equivalent to allowing the conductive portion of the protruding structure to transmit a power signal, and the insulating portion of the protruding structure plays an insulating role between adjacent pixels. In this way, the protruding structure can not only have a conductive function, but also play an insulating role, avoiding crosstalk between adjacent pixels and improving the display effect.

[0046] In a third aspect, an embodiment of the present application provides a display device, which includes the display panel described in any embodiment of the first aspect or a display panel prepared by the method for preparing a display panel described in any embodiment of the second aspect.

[0047] The display device provided by the embodiment of the present application is provided with a protruding structure on a pixel defining structure, and a pixel opening for accommodating a pixel is defined by the protruding structure and the pixel defining structure. The protruding structure further includes a conductive portion and an insulating portion, the conductive portion is electrically connected to the first electrode of the pixel, and an insulating portion is provided between any two adjacent pixels. In this way, it is equivalent to allowing the conductive portion of the protruding structure to transmit a power signal, and the insulating portion of the protruding structure plays an insulating role between adjacent pixels. In this way, the protruding structure can not only have a conductive function, but also play an insulating role, avoiding crosstalk between adjacent pixels and improving the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A schematic diagram of the cross-sectional structure of a display panel provided in one embodiment of the present application.

[0049] Figure 2 A schematic top view of a display panel provided in accordance with an embodiment of the present application.

[0050] Figure 3 for Figure 1 The diagram shows a partial structural diagram of a display panel during the preparation process.

[0051] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of the pixel definition structure and the isolation body of the display panel shown

[0052] Figure 5 A schematic diagram of a process for preparing a display panel provided in one embodiment of the present application.

[0053] Figure 6 A schematic diagram of the structure of a display device provided in one embodiment of the present application.

[0054] Description of reference numerals:

[0055] 1. Display device; 10. Display panel; 11. Pixel defining structure; 111. Pixel opening; 1111. First pixel opening; 1112. Second pixel opening; 1113. Third pixel opening; 112. Protruding structure; 1121. Insulating portion; 1122. Conductive portion; 12. Pixel; 12a. First sub-pixel; 12b. Second sub-pixel; 12c. Third sub-pixel; 121. First electrode; 122. Light-emitting functional portion; 123. Second electrode; 13. Insulator; 131. Main body; 132. First edge portion; 133. Second edge portion; 14. Array film layer; 141. First power signal line; 15. First common electrode; 16. Planarization layer; 17. Evaporated film layer; 18. Second common electrode. DETAILED DESCRIPTION

[0056] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0057] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0058] In this document, spatially related terms such as "upper" and "lower" are defined with reference to the accompanying drawings. Therefore, it will be understood that "upper" and "lower" are used interchangeably. It will be understood that when a layer is referred to as being "on" another layer, it can be directly formed on the other layer, or intervening layers may also be present. Therefore, it will be understood that when a layer is referred to as being "directly on" another layer, there are no intervening layers interposed therebetween.

[0059] In the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity. It is understood that when a layer or element is referred to as being "on" another layer or substrate, the layer or element may be directly on the other layer or substrate, or there may be an intermediate layer. In addition, it is also understood that when a layer is referred to as being "between" two layers, the layer may be the only layer between the two layers, or there may be one or more intermediate layers. In addition, the same reference numerals always represent the same elements.

[0060] Hereinafter, although terms such as "first", "second", etc. may be used to describe various components, these components are not necessarily limited to the above terms. The above terms are only used to distinguish one component from another component. It will also be understood that expressions used in the singular form include plural expressions, unless the expression in the singular form has a significantly different meaning in the context. In addition, in the following embodiments, it will also be understood that the terms "comprising" and / or "having" used herein illustrate the presence of the stated features or components, but do not exclude the presence or addition of one or more other features or components.

[0061] In the following embodiments, when a layer, region, or element is "connected", it can be interpreted that the layer, region, or element is not only directly connected but also connected through other constituent elements placed therebetween. For example, when a layer, region, element, etc. is described as being connected or electrically connected, the layer, region, element, etc. can be connected or electrically connected not only directly or directly, but also through another layer, region, element, etc. placed therebetween.

[0062] As used in the application documents, the term "and / or" includes any and all combinations of one or more of the related listed items. When a statement such as "at least one (one) of..." is placed after a list of elements, it modifies the entire list of elements, rather than modifying the individual elements in the list.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0064] It should also be understood that the terms “include / comprises” or “having” and the like specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0065] It should also be understood that when interpreting an element, even if not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of the specific value determined by those skilled in the art. For example, "approximately", "approximately" or "substantially" can mean within one or more standard deviations, which are not limited here.

[0066] Furthermore, in the specification, the phrase “planar distribution schematic diagram” refers to a drawing when a target portion is viewed from above, and the phrase “cross-sectional schematic diagram” refers to a drawing when a section taken by vertically cutting the target portion is viewed from the side.

[0067] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0068] First, refer to Figure 1 and Figure 2As shown, the embodiment of the present application provides a display panel 10, which includes a pixel defining structure 11 and a plurality of pixels 12. A protruding structure 112 is provided on the pixel defining structure 11, and the protruding structure 112 defines a plurality of pixel openings 111. The plurality of pixels 12 are correspondingly arranged in the plurality of pixel openings 111. The pixel 12 includes a first electrode 121, a light emitting functional portion 122, and a second electrode 123 which are stacked.

[0069] The protruding structure 112 includes a conductive portion 1122 and an insulating portion 1121. The conductive portion 1122 is electrically connected to the first electrode 121 of the pixel 12. An insulating portion 1121 is disposed between any two adjacent pixels 12.

[0070] It is understandable that the pixel defining structure 11 in the embodiment of the present application may be a pixel defining layer, or may be other film layers with insulation function. The pixel opening 111 in the embodiment of the present application is used to accommodate the pixel 12 .

[0071] Specifically, the light-emitting functional part 122 includes at least a light-emitting layer (Emission layer, EML), and may also include one or more of a hole injection layer (HIL), a hole transport layer (HTL), an electron injection layer (EIL), an electron transport layer (ETL), a hole blocking layer (HBL) and an electron blocking layer (EBL). Alternatively, the light-emitting functional part 122 may also be a stacked light-emitting layer, that is, including at least two light-emitting layers and a charge generation layer (CGL) located between each adjacent light-emitting layer. In one example, the first electrode 121 is an anode and the second electrode 123 is a cathode. In another example, the first electrode 121 is a cathode and the second electrode 123 is an anode.

[0072] It should be noted that the pixel opening 111 can be defined not only by the protrusion structure 112, but also by the protrusion structure 112 and the pixel defining structure 11. The pixel 12 can be a single sub-pixel known to those skilled in the art, or a collection of multiple sub-pixels of the same type, that is, multiple sub-pixels of the same color together constitute a pixel.

[0073] The display panel 10 provided in the embodiment of the present application is provided with a protruding structure 112 on the pixel defining structure 11, and the protruding structure 112 and the pixel defining structure 11 jointly define a pixel opening 111 for accommodating the pixel 12. The protruding structure 112 further includes a conductive portion 1122 and an insulating portion 1121, the conductive portion 1122 is electrically connected to the first electrode 121 of the pixel 12, and an insulating portion 1121 is provided between any two adjacent pixels 12. In this way, it is equivalent to allowing the conductive portion 1122 of the protruding structure 112 to transmit a power signal, and the insulating portion 1121 of the protruding structure 112 plays an insulating role between adjacent pixels 12. In this way, the protruding structure 112 can not only have a conductive function, but also play an insulating role, thereby avoiding crosstalk between adjacent pixels 12, improving the problem of chromatic impurity and low grayscale mura caused by cross-pixel leakage, and improving the display effect.

[0074] In one embodiment, the orthographic projection of the conductive portion 1122 on the pixel defining structure 11 does not overlap with the orthographic projection of the insulating portion 1121 on the pixel defining structure 11. In this way, it is equivalent to that the insulating portion 1121 does not cover the conductive portion 1122, which can simplify the structure of the protruding structure 112 and facilitate the arrangement of the conductive portion 1122 in the insulating portion 1121, thereby reducing the difficulty of arranging the protruding structure 112.

[0075] In one embodiment, the orthographic projection of the conductive portion 1122 on the pixel defining structure 11 is adjacent to the orthographic projection of the insulating portion 1121 on the pixel defining structure 11 , that is, at least a portion of the conductive portion 1122 is disposed adjacent to the insulating portion 1121 .

[0076] In this way, the conductive portion 1122 and the insulating portion 1121 can be in close contact, thereby improving the stability of the protruding structure 112 .

[0077] In one embodiment, the insulating portion 1121 and the pixel defining structure 11 are an integrated structure, so that the manufacturing difficulty of the display panel 10 can be reduced.

[0078] Specifically, when manufacturing the insulating portion 1121 of the protruding structure 112 , part of the material may be excavated from the pixel defining structure 11 to form the pixel opening 111 , so that the structure between adjacent pixel openings 111 constitutes the insulating portion 1121 .

[0079] In the embodiment of the present application, the conductive part 1122 can be understood as a conductive column arranged in the pixel defining structure 11 and the insulating part 1121. When making the conductive part 1122, a through hole can be opened on the insulating part 1121, or a through hole can be opened near the insulating part 1121 near the pixel opening 111, and then a metal material is filled into the through hole to form the conductive part 1122. In other embodiments, after preparing a whole film layer, a through hole is opened on the film layer, and a metal material is filled into the through hole, and then it is patterned to form the pixel opening 111 and the above-mentioned protruding structure 112; that is, the protruding structure 112 includes the insulating part 1121 and the conductive part 1122.

[0080] In another example, the insulating portion 1121 and the pixel defining structure 11 may also be provided separately, that is, the insulating portion 1121 is an insulating film layer stacked on the pixel defining structure 11 .

[0081] In one embodiment, the upper surface of the conductive portion 1122 is flush with the upper surface of the insulating portion 1121 , so that it is convenient to form other film layers on the upper surface of the protruding structure 112 .

[0082] In one embodiment, there are multiple conductive parts 1122, and the multiple conductive parts 1122 are arranged at intervals from each other, and each conductive part 1122 is electrically connected to the first electrode 121 of a pixel 12. In this way, on the one hand, the first electrode 121 of each pixel 12 can be controlled individually, and on the other hand, the electrical crosstalk between the first electrodes 121 of adjacent pixels 12 is reduced.

[0083] In one embodiment, the conductive portion 1122 serves as a sidewall of the pixel opening 111 and is electrically connected to the first electrode 121 of the corresponding pixel 12 .

[0084] The above arrangement, on the one hand, facilitates the electrical connection between the conductive portion 1122 and the first electrode 121 , and on the other hand, can reduce the difficulty of arranging the protruding structure 112 .

[0085] It can be understood that, in one example, the entire sidewall of the pixel opening 111 is the conductive portion 1122. In another example, a portion of the sidewall of the pixel opening 111 is the conductive portion 1122. Exemplarily, one sidewall of the pixel opening 111 is the conductive portion 1122.

[0086] In the embodiment of the present application, the conductive portion 1122 is in direct contact with the first electrode 121 , which is beneficial to reducing the resistance between the conductive portion 1122 and the first electrode 121 , thereby improving the display uniformity of the display panel 10 and reducing the energy consumption of the display panel 10 .

[0087] In one embodiment, the conductive portion 1122 penetrates the pixel defining structure 11 along the thickness direction of the pixel defining structure 11 .

[0088] In this way, on the one hand, when making the conductive part 1122, metal material can be filled in the opening of the pixel defining structure 11 to form the conductive part 1122, thereby reducing the difficulty of making the conductive part 1122; on the other hand, it is convenient to electrically connect the conductive part 1122 with the driving circuit of the display panel 10.

[0089] It should be emphasized that the second electrode 123 does not contact the sidewall of the pixel opening 111 to avoid the second electrode 123 contacting the conductive portion 1122, thereby short-circuiting the second electrode 123 and the conductive portion 1122. Specifically, the bottom surface of the second electrode 123 can be not lower than the top surface of the protrusion structure 112.

[0090] In one embodiment, the display panel 10 further includes an isolator 13 , which is disposed on the protruding structure 112 . Specifically, the isolator 13 is disposed on the top surface of the protruding structure 112 .

[0091] Furthermore, the orthographic projection of the spacer 13 on the pixel defining structure 11 covers the orthographic projection of the protrusion structure 112 on the pixel defining structure 11. Further, the orthographic projection of the spacer 13 on the pixel defining structure 11 also covers part of the bottom wall of the pixel opening 111 on both sides of the protrusion structure 112.

[0092] In this way, the insulator 13 and the protruding structure 112 can form a partition structure together. When evaporating the pixel 12, the insulator 13 and the protruding structure 112 can separate the evaporation material in the pixel opening 111 from the evaporation material outside the pixel opening 111, so that pixels 12 of different colors can be formed by repeated evaporation and etching without FMM. In this way, on the one hand, since FMM is not required during evaporation, the distance between different pixels 12 can be reduced, thereby improving the PPI of the display panel 10; on the other hand, since FMM is not required during evaporation, not only the purchase cost and maintenance cost of FMM can be reduced, but also the deformation of FMM caused by repeated use of FMM is avoided, thereby avoiding the decrease in evaporation yield caused by FMM deformation, thereby improving the evaporation yield; on the other hand, the protruding structure 112 and the insulator 13 can avoid the interconnection between adjacent pixels 12, thereby improving the problem of chromatic impurity and low grayscale mura caused by cross-pixel leakage.

[0093] Here, it should be noted that the "evaporation material" in the embodiment of the present application refers to the material used to form the light-emitting functional portion 122 when evaporating the light-emitting functional portion 122, and the material used to form the second electrode 123 when evaporating the second electrode 123. Specifically, after the evaporation is completed, the evaporation material exists on both the pixel opening 111 and the insulator 13, but because the insulator 13 and the protruding structure 112 together constitute a partition structure, the partition structure has a partition function, and therefore, the evaporation material on the insulator 13 is isolated from the evaporation material on the pixel opening 111.

[0094] It is understandable that the separator 13 may be a single-layer structure or a laminated structure. The structure of the separator 13 is not limited in the present embodiment.

[0095] In one embodiment, the spacer 13 is an insulating member. Thus, since the protruding structure 112 has a conductive portion 1122, by setting the spacer 13 as an insulating member, electrical crosstalk between the conductive portion 1122 and other conductive film layers of the display panel 10 can be avoided, thereby improving the reliability of the display panel 10.

[0096] In one embodiment, referring to Figure 4 As shown, the insulator 13 includes: a main body 131, a first edge portion 132 and a second edge portion 133. Among them, the main body 131 is arranged on the protruding structure 112. The orthographic projection of the main body 131 on the pixel defining structure 11 coincides with the orthographic projection of the protruding structure 112 on the pixel defining structure 11. The first edge portion 132 and the second edge portion 133 are respectively arranged on both sides of the main body 131 along the first direction X. The orthographic projection of the first edge portion 132 on the pixel defining structure 11 and the orthographic projection of the second edge portion 133 on the pixel defining structure 11 are respectively located on the bottom wall of the pixel opening 111 on both sides of the protruding structure 112. The first direction X is perpendicular to the thickness direction of the pixel defining structure 11 and the extension direction of the insulator 13. Specifically, the size of the first edge portion 132 along the first direction X is equal to the size of the second edge portion 133 along the first direction X. Figure 4 In FIG. 1 , W1 represents the dimension of the first edge portion 132 along the first direction X, and W2 represents the dimension of the second edge portion 133 along the first direction X.

[0097] It can be understood that in the display panel 10, the spacer 13 also supports the film layer above it, and by making the size of the first edge portion 132 along the first direction X equal to the size of the second edge portion 133 along the first direction X, it is equivalent to making the sizes of the protruding portions on both sides of the spacer 13 along the first direction X equal, so that the supporting forces on the first edge portion 132 and the second edge portion 133 are approximately balanced, thereby improving the stability of the display panel 10. In addition, the structure of the spacer 13 can be made more regular, reducing the difficulty of manufacturing the spacer 13.

[0098] In one embodiment, the first edge portion 132 and the second edge portion 133 have the same shape. In this way, the stability of the display panel 10 can be further improved, and the difficulty of manufacturing the spacer 13 can be reduced.

[0099] In one embodiment, the outer contour of the orthographic projection of the bottom surface of the insulator 13 on the pixel defining structure 11 is located outside the outer contour of the orthographic projection of the top surface of the insulator 13 on the pixel defining structure 11. In this way, the shape of the insulator 13 can be formed by etching, which is conducive to reducing the difficulty of manufacturing the insulator 13.

[0100] In one embodiment, the width of the spacer 13 gradually increases along the direction from one end of the spacer 13 away from the pixel defining structure 11 to the pixel defining structure 11. The width is the dimension of the orthographic projection of the spacer 13 on the pixel defining structure 11 in the direction perpendicular to the extension direction of the spacer 13. Figure 4 As shown, along the direction perpendicular to the paper surface, the cross-sectional shape of the separator 13 can be a trapezoid.

[0101] In this way, the partitioning effect of the separator 13 is improved and the difficulty of manufacturing the separator 13 can be reduced.

[0102] In one embodiment, the display panel 10 further includes a first common electrode 15, which is disposed on a side of the spacer 13 away from the pixel defining structure 11. The first common electrode 15 and the first electrode 121 are made of the same material.

[0103] In the embodiment of the present application, the first common electrode 15 and the first electrode 121 are formed in the same preparation process. Figure 2 and Figure 3 As shown, when manufacturing the first electrode 121, a portion of the metal material used to form the first electrode 121 is located in the pixel opening 111, and another portion of the metal material is located on the surface of the isolator 13, and the metal material located in the pixel opening 111 is disconnected from the metal material located on the surface of the isolator 13, wherein the metal material located in the pixel opening 111 forms the first electrode 121, and the metal material located on the surface of the isolator 13 forms the first common electrode 15. Exemplarily, when the second electrode 123 is manufactured, the second electrode 123 located in the pixel opening 111 and the first common electrode 15 located on the isolator 13 can be in contact to achieve electrical connection.

[0104] In one embodiment, referring to Figure 3As shown, the display panel 10 further includes a vapor-deposited film layer 17, which is disposed on a side of the first common electrode 15 away from the isolator 13. The vapor-deposited film layer 17 is made of the same material as the light-emitting functional portion 122. Specifically, when the light-emitting functional portion 122 is manufactured, the vapor-deposited film layer 17 is formed simultaneously.

[0105] In one embodiment, the display panel 10 further includes a second common electrode 18, which is disposed on a side of the evaporated film layer 17 away from the isolator 13. The second common electrode 18 is made of the same material as the second electrode 123. Specifically, when the second electrode 123 is manufactured, the second common electrode 18 is formed simultaneously.

[0106] In one embodiment, the second electrode 123 of the pixel 12 is electrically connected to the first common electrode 15 and / or the second common electrode 18 .

[0107] In this way, all the second electrodes 123 may be connected via the first common electrode 15 and / or the second common electrode 18 to form a surface electrode.

[0108] In the embodiment of the present application, the second electrode 123 of the pixel 12 is electrically connected to the first common electrode 15. Because, after the second electrode 123 is manufactured, the second electrode 123 located in the pixel opening 111 and the first common electrode 15 located on the isolator 13 can be directly in contact with each other to achieve electrical connection. It can be understood that the direct contact between the second electrode 123 of the pixel 12 and the first common electrode 15 can reduce the resistance between the second electrode 123 and the first common electrode 15, which is not only conducive to improving the display uniformity of the display panel 10, but also conducive to reducing the energy consumption of the display panel 10.

[0109] In one embodiment, the display panel 10 further includes a planarization layer 16, and the planarization layer 16 is reused as the pixel definition structure 11. In this way, the planarization layer 17 can be used as the pixel definition structure 11, which is beneficial to reducing the film layer structure and preparation process in the display panel 10.

[0110] Specifically, compared with the display panel 10 in the related art, the display panel 10 provided in the embodiment of the present application reuses the planarization layer 17 as the pixel defining structure 11. In this way, during the manufacturing process of the display panel 10, there is no need to manufacture the pixel defining layer, thereby not only eliminating the film layer structure of the pixel defining layer, but also reducing the manufacturing process of the pixel defining layer, which is beneficial to reducing the thickness and manufacturing difficulty of the display panel 10.

[0111] In one embodiment, the display panel 10 further includes an array film layer 14, which is disposed on a side of the planarization layer 16 away from the pixel 12. The conductive portion 1122 penetrates the pixel defining structure 11 and is electrically connected to the first power signal line 141 in the array film layer 14.

[0112] In this way, the first power signal line 141 in the array film layer 14 and the first electrode 121 of the pixel 12 can be connected through the conductive portion 1122, thereby simplifying the electrical connection between the first power signal line 141 in the array film layer 14 and the first electrode 121 of the pixel 12 and reducing the manufacturing difficulty.

[0113] In one embodiment, referring to Figure 1 As shown, the plurality of pixel openings 111 include a plurality of first pixel openings 1111, a plurality of second pixel openings 1112, and a plurality of third pixel openings 1113. The plurality of pixels 12 include a plurality of first sub-pixels 12a, a plurality of second sub-pixels 12b, and a plurality of third sub-pixels 12c. The plurality of first sub-pixels 12a are correspondingly arranged in the plurality of first pixel openings 1111, the plurality of second sub-pixels 12b are correspondingly arranged in the plurality of second pixel openings 1112, and the plurality of third sub-pixels 12c are correspondingly arranged in the plurality of third pixel openings 1113.

[0114] In this way, different pixels 12 can be arranged in corresponding pixel openings 111 , which is beneficial for making the shapes of pixels 12 of different colors different.

[0115] Specifically, refer to Figure 2 As shown, the shapes and sizes of pixels 12 of different colors may be different, so the shapes and sizes of the first pixel opening 1111, the second pixel opening 1112 and the third pixel opening 1113 may be different, so as to facilitate forming different pixels 12 in different pixel openings 111. It is understandable that the positions of the first pixel opening 1111, the second pixel opening 1112 and the third pixel opening 1113 may be arranged accordingly according to the arrangement requirements of the pixels 12.

[0116] It is understandable that, in a top view, the shape of the pixel opening 111 may be circular, triangular, polygonal or other shapes. The embodiment of the present application does not limit the shape of the pixel opening 111.

[0117] In one embodiment, referring to Figure 4 As shown, the depth of the first pixel opening 1111, the depth of the second pixel opening 1112 and the depth of the third pixel opening 1113 are all equal. For example, H in the figure represents the depth of the first pixel opening 1111.

[0118] In this way, during the process of forming the first pixel opening 1111 , the second pixel opening 1112 , and the third pixel opening 1113 , the etching depths of the first pixel opening 1111 , the second pixel opening 1112 , and the third pixel opening 1113 can be made the same, thereby reducing the difficulty of manufacturing the pixel opening 111 .

[0119] It should be noted that the shapes and sizes of the pixel openings 111 corresponding to different pixels 12 are different. For example, the shapes and sizes of the first pixel opening 1111, the second pixel opening 1112 and the third pixel opening 1113 are different. Therefore, the width of the protruding structure 112 between the first pixel opening 1111 and the second pixel opening 1112 may also be different from the width of the protruding structure 112 between the second pixel opening 1112 and the third pixel opening 1113. It can also be understood that the widths of the insulators 13 in different regions may be different.

[0120] In the embodiment of the present application, the insulator 13 is a grid-like structure, that is, the orthographic projection of the insulator 13 on the pixel defining structure 11 is in a grid shape.

[0121] Second, refer to Figure 5 As shown, an embodiment of the present application provides a method for preparing a display panel, and the method for preparing a display panel includes:

[0122] S100: Provide a pixel definition structure 11. In one example, the pixel definition structure 11 may be a planarization layer 17 on an array film layer 14. In another example, the pixel definition structure 11 may be a pixel definition layer.

[0123] S200: forming a protruding structure 112 on the pixel defining structure 11. The protruding structure 112 defines a plurality of pixel openings 111. The protruding structure 112 includes a conductive portion 1122 and an insulating portion 1121, and an insulating portion 1121 is disposed between any two adjacent pixel openings 111.

[0124] S300: forming a plurality of pixels 12 on the pixel definition structure 11. The plurality of pixels 12 are correspondingly arranged in the plurality of pixel openings 111. The pixel 12 comprises a first electrode 121, a light emitting functional portion 122 and a second electrode 123 which are stacked. The conductive portion 1122 is electrically connected to the first electrode 121 of the pixel 12.

[0125] The display panel 10 provided in the embodiment of the present application is provided with a protruding structure 112 on the pixel defining structure 11, and the pixel opening 111 for accommodating the pixel 12 is jointly defined by the protruding structure 112 and the pixel defining structure 11. The conductive portion 1122 of the protruding structure 112 is further electrically connected to the first electrode 121 of the pixel 12, and an insulating portion 1121 is provided between any two adjacent pixels 12. In this way, it is equivalent to allowing the conductive portion 1122 of the protruding structure 112 to transmit a power signal, and the insulating portion 1121 of the protruding structure 112 plays an insulating role between adjacent pixels 12. In this way, the protruding structure 112 can not only have a conductive function, but also play an insulating role, thereby avoiding crosstalk between adjacent pixels 12, improving the problem of chromatic impurity and low grayscale mura caused by cross-pixel leakage, and improving the display effect.

[0126] In one embodiment, when the insulating portion 1121 and the pixel defining structure 11 are an integrated structure, for example, a planarization layer is used to form the pixel defining structure 11 and the insulating portion 1121 .

[0127] Steps S100 and S200 can be combined, and the specific process is: forming a planarization layer, forming a through hole on the planarization layer, and the through hole also penetrates the planarization layer, and then filling the through hole with a metal material;

[0128] Afterwards, the film layer is etched to form a plurality of pixel openings 111 and a protruding structure 112 , and in this process, the side surface of the metal material serves as a part of the side wall of the pixel opening 111 , that is, forming an insulating portion 1121 and a conductive portion 1122 .

[0129] In this way, the insulating portion 1121 and the pixel defining structure 11 are integrated into one structure, thereby reducing the difficulty of manufacturing the display panel 10 .

[0130] After the step of forming the insulating portion 1121 and the conductive portion 1122, the method further includes:

[0131] An isolation body 13 is formed on the protrusion structure 112 .

[0132] It should be noted that S300 is performed after the isolator 13 is formed. In one example, in the process of forming the pixel 12, the first electrode 121, the light-emitting functional portion 122, and the second electrode 123 can be formed in the pixel opening 111 in sequence. At the same time, the first common electrode 15, the vapor-deposited film layer 17, and the second common electrode 18 are synchronously formed in sequence on the isolator 13. Among them, the first common electrode 15 is made of the same material as the first electrode 121, the vapor-deposited film layer 17 is made of the same material as the light-emitting functional portion 122, and the second common electrode 18 is made of the same material as the second electrode 123. Furthermore, the second electrode 123 of the pixel 12 is electrically connected to the first common electrode 15 and / or the second common electrode 18.

[0133] Thirdly, refer to Figure 6 As shown, an embodiment of the present application provides a display device 1, which includes a display panel 10 according to any embodiment of the first aspect or a display panel 10 prepared by the method of the second aspect.

[0134] Specifically, the display device 1 can be a laptop computer, a mobile phone, a wireless device, a personal digital assistant (PDA), a handheld or portable computer, a GPS receiver / navigator, a camera, an MP4 video player, a camcorder, a game console, a watch, a clock, a calculator, a TV monitor, a flat-panel display, a computer monitor, a car display (e.g., an odometer display, etc.), a navigator, a cockpit controller and / or display, a display of a camera view (e.g., a display of a rearview camera in a vehicle), an electronic photo, an electronic billboard or sign, a projector, etc.

[0135] The display device 1 provided in the embodiment of the present application is provided with a protruding structure 112 on the pixel defining structure 11, and the pixel opening 111 for accommodating the pixel 12 is jointly defined by the protruding structure 112 and the pixel defining structure 11. The conductive portion 1122 of the protruding structure 112 is further electrically connected to the first electrode 121 of the pixel 12, and an insulating portion 1121 is provided between any two adjacent pixels 12. In this way, it is equivalent to allowing the conductive portion 1122 of the protruding structure 112 to transmit a power signal, and the insulating portion 1121 of the protruding structure 112 plays an insulating role between adjacent pixels 12. In this way, the protruding structure 112 can not only have a conductive function, but also play an insulating role, thereby avoiding crosstalk between adjacent pixels 12, improving the problem of chromatic impurity and low grayscale mura caused by cross-pixel leakage, and improving the display effect.

[0136] In the case of using “including”, “having”, and “comprising” described herein, another component may be added unless a clear limiting term such as “only”, “consisting of”, etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as being one in number.

[0137] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0138] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: include: Pixel definition structure; A convex structure is disposed on the pixel defining structure, and the convex structure defines a plurality of pixel openings; as well as A plurality of pixels are correspondingly arranged in the plurality of pixel openings; The pixel includes a first electrode, a light emitting function portion, and a second electrode which are stacked; Wherein, the protruding structure includes a conductive part and an insulating part; the conductive part is electrically connected to the first electrode of the pixel; and the insulating part is provided between any two adjacent pixels.

2. The display panel according to claim 1, characterized in that: The orthographic projection of the conductive portion on the pixel defining structure does not overlap with the orthographic projection of the insulating portion on the pixel defining structure; Optionally, an orthographic projection of the conductive portion on the pixel defining structure is adjacent to an orthographic projection of the insulating portion on the pixel defining structure; Optionally, the insulating portion and the pixel defining structure are an integrated structure; Optionally, the conductive portion is flush with an upper surface of the insulating portion; Optionally, the conductive portion serves as a side wall of the pixel opening and is electrically connected to the first electrode of the corresponding pixel.

3. The display panel according to claim 1, characterized in that: The display panel further includes: An isolator is disposed on the protruding structure; the orthographic projection of the isolator on the pixel defining structure covers the orthographic projection of the protruding structure on the pixel defining structure; Optionally, the isolator is an insulating member.

4. The display panel according to claim 3, characterized in that: The isolator comprises: A main body is disposed on the protruding structure; an orthographic projection of the main body on the pixel defining structure coincides with an orthographic projection of the protruding structure on the pixel defining structure; The first edge portion and the second edge portion are respectively arranged on both sides of the main body along the first direction; the orthographic projection of the first edge portion on the pixel defining structure and the orthographic projection of the second edge portion on the pixel defining structure are respectively located on the bottom wall of the pixel opening on both sides of the convex structure; the first direction is perpendicular to the thickness direction of the pixel defining structure and the extension direction of the isolator; Wherein, a size of the first edge portion along the first direction is equal to a size of the second edge portion along the first direction.

5. The display panel according to claim 4, characterized in that: The outer contour of the orthographic projection of the bottom surface of the isolator on the pixel definition structure is located at the periphery of the outer contour of the orthographic projection of the top surface of the isolator on the pixel definition structure; Optionally, the width of the insulator gradually increases along the direction from one end of the insulator away from the pixel defining structure to the pixel defining structure; the width is the dimension of the positive projection of the insulator on the pixel defining structure in a direction perpendicular to the extension direction of the insulator.

6. The display panel according to claim 3, characterized in that: The display panel further includes a first common electrode, which is disposed on a side of the isolator away from the pixel defining structure; the first common electrode is made of the same material as the first electrode; Optionally, the display panel further comprises a vapor-deposited film layer, and the vapor-deposited film layer is arranged on a side of the first common electrode away from the isolator; the vapor-deposited film layer is made of the same material as the light-emitting functional part; Optionally, the display panel further comprises a second common electrode, which is disposed on a side of the evaporated film layer away from the isolator; the second common electrode is made of the same material as the second electrode; Optionally, the second electrode of the pixel is electrically connected to the first common electrode and / or the second common electrode.

7. The display panel according to claim 1, characterized in that: The display panel further includes: a planarization layer, the planarization layer being multiplexed as the pixel definition structure; Optionally, the display panel further includes: The array film layer is arranged on a side of the planarization layer away from the pixel; the conductive portion penetrates the pixel defining structure and is electrically connected to the first power signal line in the array film layer.

8. The display panel according to claim 1, characterized in that: The plurality of pixel openings include a plurality of first pixel openings, a plurality of second pixel openings, and a plurality of third pixel openings; the plurality of pixels include a plurality of first sub-pixels, a plurality of second sub-pixels, and a plurality of third sub-pixels; The plurality of first sub-pixels are correspondingly arranged in the plurality of first pixel openings, the plurality of second sub-pixels are correspondingly arranged in the plurality of second pixel openings, and the plurality of third sub-pixels are correspondingly arranged in the plurality of third pixel openings; Optionally, the depth of the first pixel opening, the depth of the second pixel opening and the depth of the third pixel opening are all equal.

9. A method for preparing a display panel, characterized in that: include: providing a pixel defining structure; forming a protrusion structure on the pixel defining structure; The raised structure defines a plurality of pixel openings; The protruding structure includes a conductive portion and an insulating portion, and the insulating portion is provided between any two adjacent pixel openings; A plurality of pixels are formed on the pixel definition structure; the plurality of pixels are correspondingly arranged in the plurality of pixel openings; The pixel includes a first electrode, a light emitting function portion, and a second electrode that are stacked, and the conductive portion is electrically connected to the first electrode.

10. A display device, characterized in that: A display panel comprising the display panel according to any one of claims 1 to 8 or a display panel prepared by the method for preparing a display panel according to claim 9.

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