Display panel and display apparatus

Abstract

A display panel, comprising: a driving substrate (100), which comprises a plurality of pixel circuits (110); and a light-emitting device layer (200), which is arranged on one side of the driving substrate (100). The light-emitting device layer (200) comprises a first electrode layer (210), a pixel definition layer (220), a light-emitting layer (230) and a second electrode layer (240), wherein the first electrode layer (210) comprises a plurality of first electrode blocks (211), the orthographic projections of different first electrode blocks (211) on the driving substrate (100) do not overlap with each other, the first electrode blocks (211) are electrically connected to the pixel circuits (110), the pixel definition layer (220) comprises a plurality of pixel openings (201), the orthographic projections of the pixel openings (201) on the driving substrate (100) fall within the orthographic projections of the first electrode blocks (211) on the driving substrate (100), and the pixel definition layer (220) covers edges of the first electrode blocks (211); the pixel definition layer (220) comprises a first slope portion (227) which overlaps with the edges of the first electrode blocks (211), and the end of the first slope portion (227) that is close to the driving substrate (100) and the end of the first slope portion (227) that is away from the driving substrate (100) are each provided with a first micro-protrusion portion (221); and the light-emitting layer (230) is arranged on the side of the pixel definition layer (220) that is away from the driving substrate (100), and the second electrode layer (240) is arranged on the side of the light-emitting layer (230) that is away from the driving substrate (100).

Description

Display panel and display device TECHNICAL FIELD

[0001] The present disclosure relates to a display panel and a display device, in particular to a display panel and a display device. BACKGROUND

[0002] At present, with the continuous development of display technology, Micro-OLED (micro organic light emitting diode) display devices gradually enter the consumer market. Micro-OLED has the advantages of small size and high resolution, can integrate more circuits, and thus realize lightweight, so it has broad prospects for light emission.

[0003] In the product structure of the existing Micro-OLED, the first electrode layer obtains a block structure through a patterning process, which is used to realize independent driving of light emitting devices. There is a spacing area between the anodes of different light emitting devices, and a groove structure is formed between adjacent anodes. The edge of the anode forms a film layer step difference that is easy to cause unevenness of the film layer above the anode, and even cause the cathode to pierce, resulting in short circuit between the cathode and the anode, and causing display defects.

[0004] SUMMARY

[0005] In a first aspect, the present disclosure provides a display panel, comprising:

[0006] a driving substrate, the driving substrate comprising a plurality of pixel circuits;

[0007] a light emitting device layer disposed on one side of the driving substrate, the light emitting device layer comprising a first electrode layer, a pixel defining layer, a light emitting layer, and a second electrode layer;

[0008] the first electrode layer comprises a plurality of first electrode blocks, the orthographic projections of different first electrode blocks on the driving substrate do not overlap, the first electrode blocks are electrically connected to the pixel circuits, the pixel defining layer comprises a plurality of pixel openings, the orthographic projections of the pixel openings on the driving substrate fall within the orthographic projections of the first electrode blocks on the driving substrate, and the pixel defining layer covers the edges of the first electrode blocks;

[0009] the pixel defining layer comprises a first slope portion overlapping the edges of the first electrode blocks, and at least one of an end of the first slope portion close to the driving substrate and an end of the first slope portion away from the driving substrate is provided with a first micro-protrusion portion;

[0010] the light emitting layer is disposed on a side of the pixel defining layer away from the driving substrate, and the second electrode layer is disposed on a side of the light emitting layer away from the driving substrate.

[0011] In some embodiments, the first micro-protrusion includes a first sub-protrusion and a second sub-protrusion, the second sub-protrusion is connected to an end of the first slope away from the driving substrate, and the first sub-protrusion is connected to an end of the first slope close to the driving substrate.

[0012] In the first direction, a vertical distance between a protrusion top of the first sub-protrusion and a lower surface of the first electrode layer is a first distance, and a vertical distance between a protrusion top of the second sub-protrusion and the lower surface of the first electrode layer is a second distance, the first direction being a direction perpendicular to a plane on which the driving substrate is located.

[0013] The first distance is less than the second distance.

[0014] In some embodiments, a first sub-groove is formed between the first slope and the first sub-protrusion.

[0015] In some embodiments, the pixel defining layer includes a first structure and a second structure, the first slope and the first micro-protrusion are both connected between the first structure and the second structure, and the first structure, the second structure, the first sub-groove, and the first micro-protrusion are of an integral structure.

[0016] A normal projection of the first structure on the driving substrate does not overlap a normal projection of the first electrode block on the driving substrate, and a normal projection of the second structure on the driving substrate overlaps the normal projection of the first electrode block on the driving substrate.

[0017] In the first direction, a vertical distance between a side surface of the first structure away from the driving substrate and the lower surface of the first electrode layer is a third distance, and a vertical distance between a side surface of the second structure away from the driving substrate and the lower surface of the first electrode layer is a fourth distance, the third distance being less than the fourth distance.

[0018] In some embodiments, the fourth distance is greater than the first distance, and the third distance is less than the first distance.

[0019] In some embodiments, a slot edge of the first sub-groove close to the first sub-protrusion is connected to the first sub-protrusion, and a slot edge of the first sub-groove close to the second sub-protrusion is connected to the second sub-protrusion.

[0020] In the first direction, a vertical distance between the slot edge of the first sub-groove close to the first sub-protrusion and the lower surface of the first electrode layer is a fifth distance, and a vertical distance between the slot edge of the first sub-groove close to the second sub-protrusion and the lower surface of the first electrode layer is a sixth distance, the fifth distance being less than the sixth distance.

[0021] In some embodiments, the first electrode block comprises a first conductive layer, a second conductive layer and a third conductive layer arranged in a stack, the first conductive layer is between the second conductive layer and the driving substrate, the second conductive layer is between the first conductive layer and the third conductive layer;

[0022] The second conductive layer and the third conductive layer each have a projection on the driving substrate that falls within the projection of the first conductive layer on the driving substrate;

[0023] The first sub-protrusion has a projection on the driving substrate that does not overlap with the projection of the third conductive layer on the driving substrate.

[0024] In some embodiments, the pixel-defining layer is provided with a second sub-groove on a side away from the driving substrate;

[0025] The first sub-groove and the second sub-groove have different sizes in the first direction;

[0026] The second sub-groove is between two adjacent first sub-grooves.

[0027] The second sub-groove has a projection on the driving substrate that does not overlap with the projection of the first electrode block on the driving substrate.

[0028] In some embodiments, the first sub-groove has a projection on the driving substrate that overlaps with an edge of the projection of the first electrode block on the driving substrate;

[0029] The first sub-groove has a size in the first direction that is smaller than the size of the second sub-groove in the first direction.

[0030] In some embodiments, the first sub-groove has a projection on the driving substrate that surrounds the projection of the first electrode block on the driving substrate; and / or,

[0031] The second sub-groove has a projection on the driving substrate that surrounds the projection of the first electrode block on the driving substrate; and / or,

[0032] The first sub-protrusion has a projection on the driving substrate that surrounds the projection of the pixel opening on the driving substrate; and / or,

[0033] The second sub-protrusion has a projection on the driving substrate that surrounds the projection of the pixel opening on the driving substrate.

[0034] In some embodiments, the pixel defining layer is provided with a second groove on a side surface close to the pixel opening, a groove bottom of the second groove being a side surface of the second defining layer close to the pixel opening.

[0035] In some embodiments, the pixel defining layer comprises a first defining layer, a second defining layer and a third defining layer arranged in a stack, the second defining layer being between the first defining layer and the third defining layer, the first defining layer being between the driving substrate and the second defining layer.

[0036] A side surface of the second defining layer close to the pixel opening is a groove bottom of the second groove, a side of the first defining layer close to the pixel opening is in part of a groove opening of the second groove, and a side of the third defining layer close to the pixel opening is in part of the groove opening of the second groove.

[0037] In some embodiments, the pixel defining layer comprises a first defining layer, a second defining layer and a third defining layer arranged in a stack, the second defining layer being between the first defining layer and the third defining layer, the first defining layer being between the driving substrate and the second defining layer.

[0038] In a direction in which the first micro-protrusion points to the pixel opening, the side surface of the first defining layer and the side surface of the third defining layer close to the pixel opening both exceed the side surface of the second defining layer close to the pixel opening.

[0039] In some embodiments, in the direction in which the first micro-protrusion points to the pixel opening, the side surface of the first defining layer close to the pixel opening exceeds the side surface of the third defining layer close to the pixel opening.

[0040] In some embodiments, an edge of the second defining layer in orthographic projection on the driving substrate surrounds an edge of the third defining layer in orthographic projection on the driving substrate.

[0041] An edge of the third defining layer in orthographic projection on the driving substrate surrounds an edge of the first defining layer in orthographic projection on the driving substrate.

[0042] In some embodiments, a protrusion height of the first micro-protrusion is less than or equal to a thickness of the second defining layer; or,

[0043] A protrusion height of the first micro-protrusion is less than or equal to a size of the second groove in a first direction, the first direction being a direction perpendicular to a plane on which the driving substrate is located.

[0044] In some embodiments, the light emitting layer comprises a charge generation layer, the charge generation layer being broken at a position where an edge of the pixel defining layer is located.

[0045] In some embodiments, the pixel defining layer is provided with a third groove away from a side of the driving substrate, an opening of the third groove faces away from the driving substrate, and the third groove is located in a region between adjacent first electrode blocks.

[0046] In some embodiments, in a direction of a connection line of the adjacent first electrode blocks, a dimension of the third groove away from one end of the driving substrate is smaller than a dimension of the third groove close to the one end of the driving substrate.

[0047] In some embodiments, when the pixel defining layer comprises a first sub-groove, a ratio of a groove depth of the third groove in a first direction to a groove depth of the first sub-groove in the first direction is greater than 1.

[0048] The first direction is a direction perpendicular to a plane on which the driving substrate is located.

[0049] In some embodiments, the pixel defining layer comprises a first defining layer, a second defining layer and a third defining layer which are arranged in a stack, the second defining layer is located between the first defining layer and the third defining layer, and the first defining layer is located between the driving substrate and the second defining layer.

[0050] The third defining layer comprises a first hollow, the second defining layer comprises a second hollow, the first hollow and the second hollow are in communication, and the first hollow and the second hollow are both located between two adjacent first electrode blocks.

[0051] In a direction of a connection line between the two adjacent first electrode blocks, a dimension of the second hollow is greater than a dimension of the first hollow.

[0052] In some embodiments, the first defining layer is provided with a fourth groove away from a side of the driving substrate, and the fourth groove is in communication with the second hollow.

[0053] In a direction of a connection line between the two adjacent first electrode blocks, a dimension of the second hollow is greater than a dimension of the fourth groove.

[0054] In some embodiments, an edge of a projection of the fourth groove on the driving substrate at least partially overlaps with an edge of a projection of the first hollow on the driving substrate; or,

[0055] The projection of the fourth groove on the driving substrate falls within the projection of the first hollow on the driving substrate.

[0056] In some embodiments, the pixel defining layer includes a first defining layer, a second defining layer, and a third defining layer, the second defining layer is located between the first defining layer and the third defining layer, and the first defining layer is located between the driving substrate and the second defining layer.

[0057] The first defining layer is provided with a third sub-protrusion and / or a fifth groove on a side away from the driving substrate, in the case where the pixel defining layer is provided with a first sub-groove, a normal projection of the first sub-groove on the driving substrate overlaps a normal projection of the fifth groove on the driving substrate, and a normal projection of the first micro-protrusion on the driving substrate overlaps a normal projection of the third sub-protrusion on the driving substrate; and / or,

[0058] The second defining layer is provided with a fourth sub-protrusion and / or a sixth groove on a side away from the driving substrate, a normal projection of the first sub-groove on the driving substrate overlaps a normal projection of the sixth groove on the driving substrate, and a normal projection of the first micro-protrusion on the driving substrate overlaps a normal projection of the fourth sub-protrusion on the driving substrate.

[0059] In some embodiments, the light-emitting layer includes a charge generation layer, and the charge generation layer is broken at a position where a slot of the fourth groove is located.

[0060] In some embodiments, the light-emitting layer is provided with a second protrusion on a side away from the driving substrate, and at least two second protrusions are arranged in a region between adjacent first electrode blocks.

[0061] A normal projection of the second protrusion on the driving substrate covers an edge of a normal projection of the first electrode block on the driving substrate.

[0062] In some embodiments, the light-emitting layer is provided with a first recess and a second recess on a side away from the driving substrate, and the second protrusion is located between the first recess and the second recess.

[0063] In a direction of the pixel defining layer pointing to the pixel opening, the second recess is closer to the pixel opening relative to the first recess.

[0064] In some embodiments, a curvature change rate of the second recess is greater than a curvature change rate of the first recess.

[0065] In some embodiments, the light-emitting layer is provided with a third protrusion on a side away from the driving substrate, the first recess is located between the second protrusion and the third protrusion, and a protrusion height of the third protrusion is less than a protrusion height of the second protrusion.

[0066] The light-emitting layer comprises a third structure portion and a fourth structure portion, the second recess portion is connected between the fourth structure portion and the second protruding portion, and the third protruding portion is connected between the first recess portion and the third structure portion;

[0067] A normal projection of the fourth structure portion on the drive substrate falls within a normal projection of the pixel opening on the drive substrate, and a normal projection of the third structure portion on the drive substrate does not overlap with a normal projection of the first electrode block on the drive substrate;

[0068] In the first direction, a vertical distance between a side surface of the drive substrate and a lower surface of the first electrode block is a seventh distance, a vertical distance between the side surface of the drive substrate and a lower surface of the fourth structure portion is an eighth distance, and a distance between the side surface of the drive substrate and the first electrode block is a ninth distance;

[0069] The seventh distance is greater than the eighth distance, the seventh distance is less than the ninth distance, and the eighth distance is less than the ninth distance.

[0070] In some embodiments, the light-emitting layer is provided with a second protruding portion, a first recess portion and a second recess portion away from a side of the drive substrate, a region between adjacent first electrode blocks is provided with at least two second protruding portions, the second protruding portion is located between the first recess portion and the second recess portion, and in a direction in which the pixel defining layer points to the pixel opening, the second recess portion is closer to the pixel opening relative to the first recess portion;

[0071] A normal projection of the second protruding portion on the drive substrate covers an edge of a normal projection of the first electrode block on the drive substrate;

[0072] A curvature change rate of the first recess portion is greater than a curvature change rate of the second recess portion.

[0073] In some embodiments, the light-emitting layer is provided with a third protruding portion and a third recess portion away from a side of the drive substrate, the third recess portion is connected between the second protruding portion and the third protruding portion, a protruding height of the third protruding portion is less than a protruding height of the second protruding portion, and a curvature change rate of the second recess portion is greater than a curvature change rate of the third recess portion;

[0074] The light-emitting layer comprises a third structure portion and a fourth structure portion, the second recess portion is connected between the fourth structure portion and the second protruding portion, and the third protruding portion is connected between the first recess portion and the third structure portion;

[0075] a fourth structure portion, a third structure portion, and a second structure portion, wherein a normal projection of the fourth structure portion on the drive substrate falls within a normal projection of the pixel opening on the drive substrate, and a normal projection of the third structure portion on the drive substrate does not overlap with a normal projection of the first electrode block on the drive substrate;

[0076] In the first direction, a vertical distance between a side surface of the drive substrate and a lower surface of the first electrode block is a seventh distance, a vertical distance between the side surface of the drive substrate and a lower surface of the fourth structure portion is an eighth distance, a distance between the side surface of the drive substrate and the first electrode block is a ninth distance, and a distance between the side surface of the drive substrate and the first electrode block is a tenth distance;

[0077] The eighth distance is greater than the seventh distance, the tenth distance is greater than the eighth distance, and the ninth distance is greater than the tenth distance.

[0078] In some embodiments, the light-emitting layer includes a charge generation layer and at least two layers of light-emitting material layers, and the charge generation layer is connected between two adjacent layers of the light-emitting material layers;

[0079] In the case where the first micro-protrusion portion includes a first sub-protrusion portion and a second sub-protrusion portion, a fourth protrusion portion and a fifth protrusion portion are arranged on a side of the charge generation layer away from the drive substrate, a normal projection of the fourth protrusion portion on the drive substrate overlaps with a normal projection of the first sub-protrusion portion on the drive substrate, and a normal projection of the fifth protrusion portion on the drive substrate overlaps with a normal projection of the second sub-protrusion portion on the drive substrate;

[0080] In the case where the pixel defining layer is provided with a first sub-groove, a fourth recess portion and a fifth recess portion are arranged on a side of the charge generation layer away from the drive substrate, a normal projection of the fourth recess portion on the drive substrate overlaps with a normal projection of the first sub-groove on the drive substrate, and the fourth recess portion is connected between the fourth protrusion portion and the fifth protrusion portion;

[0081] The charge generation layer includes a fifth structure portion and a sixth structure portion, the fourth protrusion portion is connected between the fifth structure portion and the fourth recess portion, the fourth recess portion is connected between the fifth protrusion portion and the fourth protrusion portion, and a fifth recess portion is located between the fifth protrusion portion and the sixth structure portion;

[0082] A normal projection of the sixth structure portion on the driving substrate falls within a normal projection of the pixel opening on the driving substrate, and a normal projection of the fifth structure portion on the driving substrate does not overlap with a normal projection of the first electrode block on the driving substrate;

[0083] In the first direction, a vertical distance between the fifth structure portion and the side surface of the driving substrate is a eleventh distance, a vertical distance between the sixth structure portion and the side surface of the driving substrate is a twelfth distance, and a distance between the fourth protruding portion and the first electrode block is a thirteenth distance;

[0084] The eleventh distance is greater than the twelfth distance, and the thirteenth distance is greater than the eleventh distance.

[0085] In some embodiments, the protruding portion comprises an arc-shaped protrusion; and / or,

[0086] The topography of the second electrode layer matches the surface shape of the side of the light-emitting layer away from the driving substrate; and / or,

[0087] The driving substrate is provided with a seventh groove on the side close to the first electrode layer, and the seventh groove is located in the region between the two adjacent first electrode blocks.

[0088] The distance between the two adjacent first electrode blocks is greater than or equal to 0.4 μm and less than 1 μm; and / or,

[0089] In the case where the first sub-groove is provided in the pixel defining layer, the distance between the two adjacent first sub-grooves is greater than or equal to 0.2 μm; and / or,

[0090] The pixel defining layer comprises an inorganic material layer.

[0091] In some embodiments, the distance between the normal projection of the third defining layer on the driving substrate and the normal projection of the first defining layer on the driving substrate is greater than or equal to 50 nm; and / or,

[0092] The distance between the normal projection of the third defining layer on the driving substrate and the normal projection of the second defining layer on the driving substrate ranges from 50 nm to 150 nm; and / or,

[0093] The distance between the normal projection of the second defining layer on the driving substrate and the normal projection of the side of the first electrode block away from the driving substrate on the driving substrate is greater than 100 nm.

[0094] In some embodiments, a difference between a size of the second hollow and a size of the first hollow ranges from 50 nm to 150 nm in a direction of a connection between two adjacent first electrode blocks; and / or,

[0095] A distance between a projection of the second hollow on the driving substrate and a projection of a side of the first electrode block away from the driving substrate on the driving substrate is greater than 100 nm; and / or,

[0096] A projection edge of the second hollow on the driving substrate is flush with a projection edge of the first electrode block on the driving substrate.

[0097] A second aspect of the present disclosure provides a display device, comprising:

[0098] The display panel according to the first aspect.

[0099] A third aspect of the present disclosure provides a method for manufacturing a display panel, comprising:

[0100] Manufacturing a driving substrate, wherein the driving substrate comprises a plurality of pixel circuits;

[0101] Providing a first electrode layer on a side of the driving substrate, wherein the first electrode layer comprises a plurality of first electrode blocks, projections of different first electrode blocks on the driving substrate do not overlap, and the first electrode blocks are electrically connected to the pixel circuits;

[0102] Providing a pixel definition layer on a side of the first electrode blocks away from the driving substrate, wherein the pixel definition layer comprises a plurality of pixel openings, projections of the pixel openings on the driving substrate fall within projections of the first electrode blocks on the driving substrate, the pixel definition layer covers edges of the first electrode blocks, the pixel definition layer comprises a first slope portion overlapping with the edges of the first electrode blocks, and at least one of a side of the first slope portion close to the driving substrate and a side of the first slope portion away from the driving substrate is provided with a first micro-protrusion portion;

[0103] Sequentially providing a light-emitting layer and a second electrode layer on a side of the pixel definition layer away from the driving substrate, wherein the light-emitting layer is provided on a side of the pixel definition layer away from the driving substrate, and the second electrode layer is provided on a side of the light-emitting layer away from the driving substrate.

[0104] In some embodiments, before the pixel definition layer is provided on the side of the first electrode layer away from the driving substrate, the method further comprises:

[0105] Etching a side of the driving substrate close to the first electrode layer to obtain a seventh groove, wherein the seventh groove is located in a region between two adjacent first electrode blocks.

[0106] and / or,

[0107] In the case where the pixel defining layer comprises a first sub-groove, the pixel defining layer is arranged on the side of the first electrode layer away from the driving substrate, comprising:

[0108] A first pixel defining film is arranged on the side of the first electrode layer away from the driving substrate;

[0109] The first pixel defining film in the region other than the region where the eighth groove is located is removed, and the first pixel defining film in the eighth groove is etched to obtain a ninth groove, wherein the eighth groove is formed by the space between adjacent first electrode blocks and the side surface of the first electrode block, and the orthographic projection of the ninth groove on the driving substrate overlaps with the orthographic projection of the first sub-groove on the driving substrate;

[0110] A first pixel defining film, a second pixel defining film and a third pixel defining film are sequentially arranged on the side of the first electrode layer away from the driving substrate;

[0111] The third pixel defining film, the second pixel defining film and the first pixel defining film are sequentially etched to sequentially obtain a third defining layer, a second defining layer and a third defining layer, and a pixel opening is formed in the pixel defining layer, wherein the orthographic projection of the pixel opening on the driving substrate falls within the orthographic projection of the first electrode block on the driving substrate;

[0112] The side surface of the second defining layer close to the pixel opening is etched, so that in the direction in which the eighth groove points to the pixel opening, the side surface of the first defining layer and the side surface of the third defining layer close to the pixel opening both exceed the side surface of the second defining layer close to the pixel opening; or,

[0113] The third defining layer and the second defining layer are sequentially etched to form a first hollow and a second hollow, wherein the first hollow and the second hollow are in communication, and the first hollow and the second hollow are both located between adjacent two first electrode blocks, and in the direction of the line connecting the adjacent two first electrode blocks, the size of the second hollow is greater than the size of the first hollow. BRIEF DESCRIPTION OF DRAWINGS

[0114] The above and various other advantages and benefits will become apparent to those ordinarily skilled in the art upon reading the following detailed description of the preferred embodiments in conjunction with the accompanying drawings.

[0115] FIG. 1 is a schematic partial structure diagram of a display panel provided by an embodiment of the present disclosure;

[0116] FIG. 2 is a schematic partial structure diagram of another display panel provided by an embodiment of the present disclosure;

[0117] FIG. 3 is a schematic partial structure diagram of still another display panel provided by an embodiment of the present disclosure;

[0118] FIG. 4 is a schematic partial structure diagram of yet another display panel provided by an embodiment of the present disclosure;

[0119] FIG. 5 is a schematic partial structure diagram of a display panel provided by an embodiment of the present disclosure;

[0120] FIG. 6 is a schematic partial structure diagram of another display panel provided by an embodiment of the present disclosure;

[0121] FIG. 7 is a schematic partial top view of a display panel provided by an embodiment of the present disclosure;

[0122] FIG. 8 is a schematic partial structure diagram of still another display panel provided by an embodiment of the present disclosure;

[0123] FIG. 9 is a schematic partial structure diagram of yet another display panel provided by an embodiment of the present disclosure;

[0124] FIG. 10 is a schematic partial structure diagram of a display panel provided by an embodiment of the present disclosure;

[0125] FIG. 11 is a schematic partial top view of another display panel provided by an embodiment of the present disclosure;

[0126] FIG. 12 is a schematic partial structure diagram of another display panel provided by an embodiment of the present disclosure;

[0127] FIG. 13 is a schematic partial structure diagram of still another display panel provided by an embodiment of the present disclosure;

[0128] FIG. 14 is a schematic partial structure diagram of yet another display panel provided by an embodiment of the present disclosure;

[0129] FIG. 15 is a schematic partial structure diagram of a display panel provided by an embodiment of the present disclosure;

[0130] FIG. 16 is a schematic partial structure diagram of another display panel provided by an embodiment of the present disclosure;

[0131] FIG. 17 is a schematic partial structure diagram of another display panel provided by an embodiment of the present disclosure;

[0132] FIG. 18 is a schematic partial structure diagram of still another display panel provided by an embodiment of the present disclosure;

[0133] FIG. 19 is a schematic partial structure diagram of yet another display panel provided by an embodiment of the present disclosure;

[0134] FIG. 20 is a schematic partial structure diagram of a display panel according to an embodiment of the present disclosure;

[0135] FIG. 21 is a schematic partial structure diagram of another display panel according to an embodiment of the present disclosure;

[0136] FIG. 22 is a schematic structure diagram of a display device according to an embodiment of the present disclosure;

[0137] FIG. 23 is a schematic preparation flowchart of a display panel according to an embodiment of the present disclosure;

[0138] FIG. 24 is a schematic preparation flowchart of another display panel according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0139] The present application will be further described with reference to the drawings and specific embodiments. The following description is merely illustrative of the principles of the present application and is not in limitation thereof.

[0140] In this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily implying any actual such relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. The terms "two or more" include two or more than two.

[0141] The following is exemplarily described by the preparation process of the display panel. The "patterning process" in the present disclosure includes coating photoresist, mask exposure, development, etching, stripping photoresist and the like for metal material, inorganic material or transparent conductive material, and includes coating organic material, mask exposure and development and the like for organic material. The deposition can adopt any one or more of sputtering, evaporation, chemical vapor deposition, the coating can adopt any one or more of spraying, spin coating and inkjet printing, and the etching can adopt any one or more of dry etching and wet etching, which are not limited in the present disclosure. The "film" refers to a film of a certain material on a substrate layer by deposition, coating or other processes. If the "film" does not need to be patterned in the whole preparation process, the "film" can also be referred to as a "layer". If the "film" needs to be patterned in the whole preparation process, it is referred to as a "film" before the patterning process and a "layer" after the patterning process. The "layer" after the patterning process contains at least one "pattern".

[0142] The "A and B are arranged in the same layer" in the present disclosure refers to that A and B are formed at the same time by the same patterning process, and the "thickness" of the film layer refers to the size of the film layer in the direction perpendicular to the display panel. In the exemplarily embodiment of the present disclosure, "the orthographic projection of B is within the orthographic projection of A" or "the orthographic projection of A contains the orthographic projection of B" refers to that the boundary of the orthographic projection of B falls within the boundary of the orthographic projection of A, or the boundary of the orthographic projection of A overlaps with the boundary of the orthographic projection of B.

[0143] The "A and / or B" in the present disclosure includes the following three combinations: only A, only B, and the combination of A and B.

[0144] In a first aspect, the present disclosure provides a display panel, comprising: a driving substrate and a light emitting device layer; the driving substrate can comprise a plurality of pixel circuits and a signal line connected to the pixel circuits, the signal line can provide a driving signal to the pixel circuits. The light emitting device layer is arranged on one side of the driving substrate, and the light emitting device layer comprises a first electrode layer, a pixel defining layer, a light emitting layer, and a second electrode layer; the light emitting layer is arranged on the side of the pixel defining layer away from the driving substrate, and the second electrode layer is arranged on the side of the light emitting layer away from the driving substrate. The light emitting layer can emit light under the driving of the first electrode layer and the second electrode layer; the pixel defining layer can be used to define the light emitting boundary of adjacent light emitting devices. The first electrode layer comprises a plurality of first electrode blocks, and the orthographic projections of different first electrode blocks on the driving substrate do not overlap, i.e., there is a spacing between the first electrode blocks, and the block-shaped anode can be used to independently drive different light emitting devices to emit light. The first electrode blocks are electrically connected to the pixel circuits, the pixel defining layer comprises a plurality of pixel openings, the orthographic projections of the pixel openings on the driving substrate fall within the orthographic projections of the first electrode blocks on the driving substrate, and the pixel defining layer covers the edges of the first electrode blocks. The pixel defining layer comprises a first slope portion, the first slope portion is arranged on the side of the pixel defining layer away from the driving substrate, and the first slope portion overlaps the edges of the first electrode blocks, i.e., the orthographic projection of the first slope portion on the driving substrate overlaps the edges of the orthographic projection of the first electrode blocks on the driving substrate. The side of the pixel defining layer away from the driving substrate is provided with a first micro-protrusion portion, the first micro-protrusion portion can be arranged at one end of the first slope portion, or the first micro-protrusion portion can be arranged at both ends of the first slope portion. For example, the first slope portion is provided with a first micro-protrusion portion at one end close to the driving substrate. The first slope portion is provided with a first micro-protrusion portion at one end away from the driving substrate. The first slope portion can be provided with a first micro-protrusion portion at one end close to the driving substrate and at one end away from the driving substrate. The orthographic projection of the first micro-protrusion portion on the driving substrate can overlap the edges of the orthographic projection of the first electrode blocks on the driving substrate. The orthographic projection of the first micro-protrusion portion on the driving substrate can also be non-overlapping with the edges of the orthographic projection of the first electrode blocks on the driving substrate. The first slope portion can be an inclined slope, one end of the first slope portion is close to the driving substrate, and the other end of the first slope portion is away from the driving substrate, and the first slope portion is provided with a first micro-protrusion portion at both ends.

[0145] For example, the size of the micro-protrusion portion can be less than 50 nm, such as 40 nm, 30 nm, 20 nm, or 10 nm. The distance between the micro-protrusion portion and the edge of the first electrode block is also relatively close, which can be less than 50 nm, such as 40 nm, 30 nm, 20 nm, or 10 nm.

[0146] It should be noted that the protrusion portions mentioned in the present disclosure can all be micro-protrusions, and some of the protrusion portions mentioned in the present disclosure can be micro-protrusions.

[0147] In some examples, the area between two adjacent first electrode blocks can be distributed with at least two first micro-protrusion portions.

[0148] In some examples, the first slope portion can be a curved slope, for example, a concave slope, a convex slope, or a wavy slope, etc. The first slope portion mainly plays a transition role for the film layer step difference of the edge of the first electrode block, and can improve or avoid the sharp effect caused by the edge step difference of the first electrode block, and plays a certain sharp flat effect. The setting of the first micro-protrusion portion can assist the film layer transition effect of the first slope portion, further improve the film layer flatness of the edge of the first electrode block, and avoid the problem of electrode short circuit caused by too thin pixel definition layer at the edge step difference position of the first electrode block.

[0149] FIG. 1 is a schematic partial structure diagram of a display panel provided by an embodiment of the present disclosure. For example, as shown in FIG. 1, a driving substrate 100 includes a plurality of pixel circuits 110, which can include a plurality of thin film transistors and capacitors, etc., and the thin film transistors can include field effect tubes, etc. The pixel circuit in FIG. 1 is schematically shown using a solid line box. A light emitting device layer 200 includes a first electrode layer 210, a pixel definition layer 220, a light emitting layer 230, and a second electrode layer 240, and the first electrode layer 210 includes a plurality of first electrode blocks 211. The pixel definition layer 220 has a plurality of pixel openings 201, which are hollows penetrating through the pixel definition layer 220 in a first direction H, and the first direction H is a direction perpendicular to the plane on which the driving substrate 100 is located. The pixel openings 201 are boxed using a dashed line box in FIG. 1, and the pixel openings 201 are used to expose the surface of the first electrode blocks 211 away from the driving substrate 100, so that the first electrode blocks 211 are connected with the light emitting layer 230.

[0150] For example, the driving substrate can be a silicon-based driving substrate, that is, the substrate uses a single crystal silicon wafer, and the pixel circuit and the driving circuit are prepared on the wafer. The driving substrate can also be a driving substrate with a glass substrate as the substrate. The driving substrate can also be a driving substrate with a flexible substrate.

[0151] FIG. 2 is a schematic partial structure diagram of another display panel provided by an embodiment of the present disclosure. For example, referring to FIG. 2, the pixel definition layer 220 covers the edge of the first electrode block 211. The side of the pixel definition layer 220 away from the driving substrate 100 is provided with a first micro-protrusion portion 221 and a first slope portion 227, the first micro-protrusion portion 221 is arranged at both ends of the first slope portion 227, the first slope portion 227 is a slope, and the region between the two adjacent first electrode blocks 211 is provided with at least two first micro-protrusion portions 221; the orthographic projection of the first micro-protrusion portion 221 on the driving substrate 100 overlaps with the edge of the orthographic projection of the first electrode block 211 on the driving substrate 100.

[0152] It should be noted that the area between the adjacent first electrode blocks can be regarded as a groove space, the edge of the first electrode block has a film layer step difference, and the existence of the step difference is easy to cause the unevenness of the upper film layer, and the edge of the first electrode block is easy to form a film layer puncture, thereby causing the short circuit of the cathode and the anode, resulting in display failure, which seriously affects the display effect and product yield.

[0153] For example, referring to FIG. 2, the distance between the tip of the edge of the first electrode block 211 and the side surface of the pixel defining layer 220 away from the driving substrate is the edge film thickness h0, and the setting of the first slope portion 227 and the first micro-protrusion portion 221 can increase the edge film thickness h0, can reduce the stress concentration of the edge tip 212 of the first electrode block 211, and can also increase the distance between the edge of the cathode and the anode by increasing the edge film thickness h0, thereby reducing the risk of film layer puncture of the anode edge and reducing or eliminating the short circuit problem between the cathode and the anode due to film layer puncture.

[0154] It should be noted that there is a lateral transmission of leakage current between the light-emitting layers between the adjacent first electrode blocks, and the lateral transmission is only from the corresponding area of one first electrode block to the corresponding area of the adjacent first electrode block, which is easy to cause the cross-color problem between adjacent pixels.

[0155] For example, due to the existence of the step difference, the stress of the upper film layer of the edge of the first electrode block is uneven during film formation, which is easy to cause the film quality of the upper film layer of the anode to change at the edge of the anode, in addition, the film thickness of the position corresponding to the step difference is thin, and the film layer puncture is easy to occur at the edge position of the anode, causing the short circuit of the anode and the cathode.

[0156] The setting of the first slope portion and the first micro-protrusion portion away from the side of the pixel defining layer away from the driving substrate can increase the flatness of the side surface of the light-emitting layer away from the driving substrate; the setting of the first slope portion and the first micro-protrusion portion can also reduce the surface step difference slope of the pixel defining layer and the surface step difference slope of the light-emitting layer at the position corresponding to the edge of the first electrode block, that is, reduce the surface fluctuation change of the pixel defining layer and the light-emitting layer. The setting of the first slope portion and the first micro-protrusion portion can also increase the thickness of the pixel defining layer at the edge position of the anode, can increase the distance between the cathode and the anode, and can further reduce the risk of film layer puncture between the cathode and the anode, reduce the short circuit failure of the anode and the cathode at the edge of the first electrode block, and improve the product yield of the display panel. In addition, the setting of the first slope portion and the first micro-protrusion portion can increase the surface area of the pixel defining layer away from the side of the driving substrate, and further can increase the surface area of the light-emitting layer close to the side of the driving substrate. The increase of the surface area of the light-emitting layer can increase the path of lateral transmission of leakage current between the light-emitting layers corresponding to the adjacent first electrode blocks, which is conducive to the dissipation of leakage current, reduces the lateral crosstalk of leakage current between the light-emitting layers corresponding to the adjacent first electrode blocks, reduces the cross-color problem between adjacent pixels, and improves the display effect.

[0157] In some embodiments, the first micro-protrusion includes a first sub-protrusion and a second sub-protrusion, the second sub-protrusion is closer to the pixel opening relative to the first sub-protrusion. The second sub-protrusion is connected to the first slope far from the driving substrate, and the first sub-protrusion is connected to the first slope close to the driving substrate. By arranging multiple protrusions, the flatness of the film layer at the edge of the first electrode block can be further improved, and the distance between the anode and the cathode in the edge region of the first electrode block can be increased, further reducing the film layer puncture at the edge of the first electrode block, thereby reducing or eliminating the short circuit problem of the anode and the cathode at the edge of the first electrode block, and improving the product yield of the display panel. The number of protrusions can further increase the lateral leakage current transmission path of the light-emitting layer corresponding to the adjacent first electrode block, and improve the color bleeding problem.

[0158] In some embodiments, in the first direction, the vertical distance between the protrusion top of the first sub-protrusion and the lower surface of the first electrode layer is a first distance, and the vertical distance between the protrusion top of the second sub-protrusion and the lower surface of the first electrode layer is a second distance, the first direction is perpendicular to the plane where the driving substrate is located; the first distance is less than the second distance. The protrusion top of the first sub-protrusion is closer to the plane where the first electrode block is located, and the protrusion top of the second sub-protrusion is farther away from the plane where the first electrode block is located, but since the first sub-protrusion is located on the film slope of the pixel defining layer, both the first sub-protrusion and the second sub-protrusion increase the thickness of the pixel defining layer at the edge of the first electrode block, and increase the thickness of the spacing film between the anode and the cathode.

[0159] FIG. 3 is a schematic partial structure diagram of another display panel provided by an embodiment of the present disclosure. For example, referring to FIG. 3, the first micro-protrusion 221 includes a first sub-protrusion 222 and a second sub-protrusion 223, and the second sub-protrusion 223 is closer to the pixel opening 201 relative to the first sub-protrusion 222. Two first sub-protrusions 222 are located between two second sub-protrusions 223, the first sub-protrusion 222 and the second sub-protrusion 223 are arranged close to each other, and both the first sub-protrusion 222 and the second sub-protrusion 223 are arranged in the region where the edge of the first electrode block 211 is located.

[0160] For example, referring to FIG. 3, the distance between the protruding top of the first sub-protruding part 222 and the plane where the first electrode block 211 is located is a first distance h1, and the distance between the protruding top of the second sub-protruding part 223 and the plane where the first electrode block 211 is located is a second distance h2, and the first distance h1 is less than the second distance h2. In the direction where the first electrode block 211 points to the light-emitting layer 230, the protruding top of the second sub-protruding part 223 is beyond the protruding top of the first sub-protruding part 222, and the second sub-protruding part 223 can be close to the edge of the first electrode block 211 away from the driving substrate 100, and the first sub-protruding part 222 can be close to the edge of the first electrode block 211 away from the pixel definition layer 220. The edge tip of the first electrode block 211 can increase the coverage thickness of the pixel definition layer, and the problem of the tip film layer of the first electrode block piercing can be improved.

[0161] In some embodiments, the orthographic projection of the second sub-protruding part on the driving substrate falls within the orthographic projection of the first electrode block on the driving substrate; and the orthographic projection of the first sub-protruding part on the driving substrate overlaps with the orthographic projection of the first electrode block on the driving substrate. The first sub-protruding part and the second sub-protruding part are arranged at the edge of the first electrode block, which can flatten the film layer at the edge of the first electrode block, and can also increase the film thickness of the edge of the first electrode block, and reduce the edge tip effect of the first electrode block.

[0162] For example, referring to FIG. 3, the pixel definition layer 220 corresponding to the edge tip 212 of the first electrode block 211 is relatively thin, and the first sub-protruding part 222 and the second sub-protruding part 223 can increase the thickness of the pixel definition layer 220 at the edge position of the first electrode block 211. The orthographic projection of the first electrode block 211 on the driving substrate 100 is a first projection 101, the orthographic projection of the first sub-protruding part 222 on the driving substrate 100 is a second projection 102, and the orthographic projection of the second sub-protruding part 223 on the driving substrate 100 is a third projection 103. The third projection 103 falls within the first projection 101, and the second projection 102 partially overlaps with the first projection 101. The third projection 103 covers the orthographic projection of the edge tip 212 on the driving substrate 100, that is, the second sub-protruding part 223 covers the edge tip 212 of the first electrode block, which can increase the film layer coverage thickness of the edge of the first electrode block 211.

[0163] In some embodiments, a first sub-groove is formed between the first slope part and the first sub-protruding part; and the first sub-groove is close to the pixel opening relative to the first micro-protruding part. The orthographic projection of the first sub-groove on the driving substrate overlaps with the orthographic projection of the first electrode block on the driving substrate. The opening of the first sub-groove faces the side of the pixel definition layer away from the driving substrate, and the opening of the first sub-groove can face the display side, and the first sub-groove can be connected between the first slope part and the first sub-protruding part.

[0164] In some examples, the first sub-groove can be part of a first slope, which can be a concave curved slope or a wavy slope.

[0165] In some embodiments, the first micro-protrusion can be close to the pixel opening relative to the first sub-groove. At least two first sub-grooves can be arranged between two adjacent first electrode blocks, and the number of first sub-grooves can correspond to the number of first micro-protrusions. At least two first slopes can be arranged between two adjacent first electrode blocks, and the first slopes cover the edges of the first anode blocks.

[0166] FIG. 4 is a schematic partial structure diagram of another display panel according to an embodiment of the present disclosure. As an example, referring to FIG. 4, the pixel defining layer 220 is provided with a first sub-groove 224 on the side away from the driving substrate 100, and the first sub-groove 224 is located between a first slope 227 and a second micro-protrusion 223. The first micro-protrusion 222, the first slope 227, the first sub-groove 224, and the second micro-protrusion 223 are arranged such that the surface of the pixel defining layer 220 away from the driving substrate 100 forms a concave-convex curved surface. The concave-convex curved surface can increase the surface area. The increase in the surface area of the pixel defining layer 220 away from the driving substrate 100 can lengthen the dissipation path of the lateral leakage current in the light-emitting layer 230, thereby further reducing the transmission of the lateral leakage current between adjacent light-emitting devices and reducing the cross-color problem between adjacent pixels.

[0167] It should be noted that the two first sub-grooves arranged between the two adjacent first electrode blocks 211 in FIG. 4 are only exemplary representations, and more first sub-grooves, such as 3, 4, 5, or more, can also be arranged between the two adjacent first electrode blocks 211.

[0168] As an example, referring to FIG. 4, the first sub-groove 224 is located between the first micro-protrusion 222 and the second micro-protrusion 223, and the orthographic projection of the first sub-groove 224 on the driving substrate 100 is a fourth projection 104. The fourth projection 104 overlaps the first projection 101.

[0169] In some embodiments, the pixel defining layer comprises a first structure part and a second structure part, the first slope part and the first micro-protrusion part are connected between the first structure part and the second structure part, and the first structure part, the second structure part, the first slope part, the first sub-groove and the first micro-protrusion part are of an integrated structure; the first structure part, the second structure part, the first slope part, the first sub-groove and the first micro-protrusion part can be obtained by etching, and the etching process can be photolithography or other etching methods. The orthographic projection of the first structure part on the driving substrate does not overlap with the orthographic projection of the first electrode block on the driving substrate, and the orthographic projection of the second structure part on the driving substrate overlaps with the orthographic projection of the first electrode block on the driving substrate; the first structure part is located between adjacent first electrode blocks, and the second structure part covers the edge of the first electrode block. In the first direction, the vertical distance between the side surface of the first structure part away from the driving substrate and the lower surface of the first electrode layer is a third distance, and the vertical distance between the side surface of the second structure part away from the driving substrate and the lower surface of the first electrode layer is a fourth distance, and the third distance is less than the fourth distance.

[0170] For example, referring to FIG. 4, the pixel defining layer 220 comprises a first structure part 225 and a second structure part 226, the first structure part 225 is connected between two first micro-protrusion parts 222, the first sub-groove 224 is connected between the first micro-protrusion part 222 and the second micro-protrusion part 223, the first slope part 227 is connected between the second micro-protrusion part 223 and the first sub-groove 224, and the second micro-protrusion part 223 is connected between the first sub-groove 224 and the second structure part 226. The second structure part 226 overlaps the edge of the first electrode block 211, and the first structure part 225 is located in the area between adjacent two first electrode blocks 211, i.e., the first structure part 225 is located in the recess space formed between the adjacent two first electrode blocks 211. The first slope part 227, the first micro-protrusion part and the first sub-groove 224 are located in the stepped area between the first structure part 225 and the second structure part 226, which is used to gently change the film thickness, and can also increase the surface area of the pixel defining layer 220 away from the driving substrate 100, thereby reducing the lateral leakage and improving the cross-color problem between pixels.

[0171] For example, referring to FIG. 4, in the first direction H, the vertical distance between the side surface of the first structure part 225 away from the driving substrate 100 and the lower surface of the first electrode layer is a third distance h3, and the vertical distance between the side surface of the second structure part 226 away from the driving substrate 100 and the lower surface of the first electrode layer is a fourth distance h4, and the third distance h3 is less than the fourth distance h4.

[0172] In some examples, referring to FIG. 4, in the first direction H, the vertical distance between the protruding vertex of the first micro-protrusion part 222 and the lower surface of the first electrode layer is a first distance h1; the fourth distance h4 is greater than the first distance h1, and the third distance h3 is less than the first distance h1.

[0173] In some embodiments, the first sub-groove is connected to the first sub-protrusion near the notch edge of the first sub-protrusion, and the first sub-groove is connected to the second sub-protrusion near the notch edge of the second sub-protrusion.

[0174] In some examples, referring to FIG. 4, the protruding top of the first sub-protrusion 222 can be regarded as the notch edge of the first sub-groove 224 near the first sub-protrusion 222, and the protruding top of the second sub-protrusion 223 can be regarded as the notch edge of the first sub-groove 224 near the second sub-protrusion 223. The close connection of the first sub-protrusion 222, the first sub-groove 224 and the second sub-protrusion 223 can better improve the flatness of the film layer above the pixel definition layer 220 and improve the problem of film layer puncture between the anode and the cathode.

[0175] In some embodiments, in the first direction, the vertical distance between the first sub-groove near the notch edge of the first sub-protrusion and the lower surface of the first electrode layer is a fifth distance, and the vertical distance between the first sub-groove near the notch edge of the second sub-protrusion and the lower surface of the first electrode layer is a sixth distance. The fifth distance is smaller than the sixth distance. The notch edges of different sides of the first sub-groove have different heights, and in the direction in which the driving substrate 100 points to the pixel definition layer, the notch edge near the second sub-protrusion side of the first sub-groove is higher than the notch edge near the first sub-protrusion side. The first sub-groove can play a role in smoothing the film layer step difference between the first structure and the second structure.

[0176] For example, referring to FIG. 4, the protruding top of the first sub-protrusion 222 can be regarded as the notch edge of the first sub-groove 224 near the first sub-protrusion 222, and the protruding top of the second sub-protrusion 223 can be regarded as the notch edge of the first sub-groove 224 near the second sub-protrusion 223. The fifth distance can be the same as the first distance h1, and the sixth distance can be the same as the second distance h2.

[0177] In some embodiments, the first electrode block includes a first conductive layer, a second conductive layer and a third conductive layer arranged in a stack, the first conductive layer is located between the second conductive layer and the driving substrate, and the second conductive layer is located between the first conductive layer and the third conductive layer. The stack structure of the three layers of conductive layers can enhance the conductive performance as the anode. The orthographic projection of the second conductive layer and the third conductive layer on the driving substrate falls within the orthographic projection of the first conductive layer on the driving substrate. The orthographic projection of the first sub-protrusion on the driving substrate does not overlap with the orthographic projection of the third conductive layer on the driving substrate. The first electrode block can be prepared by etching process. During the etching process, the edge of the first electrode block will form an etching slope, and the edge of the orthographic projection of the first conductive layer on the driving substrate will exceed the edge of the orthographic projection of the second conductive layer and the third conductive layer on the driving substrate.

[0178] FIG. 5 is a schematic partial structure diagram of a display panel according to an embodiment of the present disclosure. As an example, referring to FIG. 5, the first electrode block 211 includes a first conductive layer 213, a second conductive layer 214, and a third conductive layer 215, the second conductive layer 214 is between the first conductive layer 213 and the third conductive layer 215, and the first conductive layer 213 is arranged close to the driving substrate 100. The edge end surface of the first conductive layer 213, the second conductive layer 214, and the third conductive layer 215 are all bevels, the edge end surface of the first electrode block 211 is a bevel with a slope, and is obtained by etching process. The orthographic projection of the first conductive layer 213 on the driving substrate 100 is the same as the orthographic projection of the first electrode block 211 on the driving substrate 100, and both are shown as the first projection 101. The orthographic projection of the second conductive layer 214 on the driving substrate 100 is the fifth projection 105, and the orthographic projection of the third conductive layer 215 on the driving substrate 100 is the sixth projection 106, both of which fall within the first projection 101. The second projection 102 corresponding to the first sub-protruding part 222 partially overlaps the first projection 101, the second projection 102 has less overlap with the fifth projection 105, and the second projection 102 has no overlap with the sixth projection 106. The orthographic projection of the second sub-protruding part 223 on the driving substrate 100 partially overlaps the sixth projection 106.

[0179] In some examples, the orthographic projection of the first sub-protruding part on the driving substrate can have no overlap with the orthographic projection of the second conductive layer on the driving substrate.

[0180] As an example, referring to FIG. 5, the materials of the first conductive layer 213 and the third conductive layer 215 can be the same, for example, can be titanium, and the material of the second conductive layer 214 can be aluminum. The materials of the first conductive layer 213 and the third conductive layer 215 can both be ITO (indium tin oxide), and the material of the second conductive layer 214 can be silver.

[0181] As an example, the material of the first conductive layer 213 can be titanium, the material of the second conductive layer 214 can be aluminum, and the material of the third conductive layer 215 can be ITO.

[0182] In some embodiments, the pixel defining layer is provided with a second sub-groove on the side away from the driving substrate; the size of the first sub-groove in the first direction is different from the size of the second sub-groove in the first direction. The provision of the second sub-groove can further increase the surface area of the side of the pixel defining layer away from the driving substrate, and further improve the adjacent pixel color bleeding problem. The groove depths of the first sub-groove and the second sub-groove are different, which can avoid the influence of the grooves on the flatness of the film layer.

[0183] In some embodiments, the second sub-groove is located between two adjacent first sub-grooves. The orthographic projection of the second sub-groove on the driving substrate does not overlap with the orthographic projection of the first electrode block on the driving substrate. The second sub-groove can be disposed on the first structure portion.

[0184] In some embodiments, the orthographic projection of the first sub-groove on the driving substrate overlaps with the edge of the orthographic projection of the first electrode block on the driving substrate. The size of the first sub-groove in the first direction is smaller than the size of the second sub-groove in the first direction. The groove depth of the first sub-groove is smaller than the groove depth of the second sub-groove, which can avoid the influence of the setting of the second sub-groove on the flatness of the film layer.

[0185] FIG. 6 is a schematic partial structure diagram of another display panel provided by an embodiment of the present disclosure. For example, referring to FIG. 6, the first sub-groove 224 is located between the first sub-protruding portion 222 and the second sub-protruding portion 223, and the second sub-groove 228 is located between two first sub-protruding portions 222. The orthographic projection of the first sub-groove 224 on the driving substrate 100 overlaps with the orthographic projection of the first electrode block 211 on the driving substrate 100, and the orthographic projection of the second sub-groove 228 on the driving substrate 100 does not overlap with the orthographic projection of the first electrode block 211 on the driving substrate 100. The setting of the second sub-groove 228 can further increase the surface area of the pixel definition layer, thereby lengthening the transmission path of the lateral leakage current, strengthening the dissipation of the leakage current, and improving the cross-color problem caused by the lateral leakage current. The second sub-groove 228 is disposed on the first structure portion 225. The openings of the first sub-groove 224 and the second sub-groove 228 are both directed away from the driving substrate 100.

[0186] In some embodiments, the orthographic projection of the first sub-groove on the driving substrate surrounds the orthographic projection of the first electrode block on the driving substrate; the first electrode block is a block electrode, and the first sub-groove can be a ring-shaped groove.

[0187] In some examples, the orthographic projection of the second sub-groove on the driving substrate surrounds the orthographic projection of the first electrode block on the driving substrate; the second sub-groove can be a ring-shaped groove.

[0188] In some examples, the orthographic projection of the first sub-protruding portion on the driving substrate surrounds the orthographic projection of the pixel opening on the driving substrate. The first sub-protruding portion can be a ring-shaped protruding portion.

[0189] In some examples, the orthographic projection of the second sub-protruding portion on the driving substrate surrounds the orthographic projection of the pixel opening on the driving substrate. The second sub-protruding portion can be a ring-shaped protruding portion.

[0190] FIG. 7 is a schematic partial top view of a display panel according to an embodiment of the present disclosure. By way of example, referring to FIG. 7, the dashed lines represent the protruding apexes of the protrusions or the recessed apexes of the recesses. The second sub-protrusion 223 surrounds the pixel opening 201, the first sub-recess 224 surrounds the second sub-protrusion 223, the first sub-protrusion 222 surrounds the first sub-recess 224, and the second sub-recess 228 surrounds the first sub-protrusion 222. FIG. 7 is merely an example, and the first sub-recess and the second sub-recess can not be limited to surrounding the pixel opening 201, but can also be partially surrounding the pixel opening 201.

[0191] In some embodiments, the pixel defining layer is provided with a second recess on the side close to the pixel opening, and the slot of the second recess faces the pixel opening. The provision of the second recess can achieve an undercut structure of the side of the pixel defining layer.

[0192] It should be noted that the light-emitting layer includes conductive film layers such as a charge generation layer, a charge transport layer, an electron generation layer, and an electron transport layer. The conductive layer in the light-emitting layer is prone to horizontal current transmission, thereby forming a horizontal leakage current, which is prone to causing color mixing problems. The boundary of the pixel defining layer can cause the conductive layer in the light-emitting layer to break, and the provision of the second recess on the side of the pixel defining layer can facilitate the breaking of the conductive layer in the light-emitting layer on the boundary of the pixel defining layer, so as to block the transmission of the horizontal leakage current.

[0193] In some examples, a Tandem Organic Light Emitting Diode (Tandem OLED) has high luminous brightness and luminous efficiency, and can prolong the service life of the Tandem OLED. In a Tandem OLED display panel, a silicon-based driving substrate can be applied, a plurality of color light-emitting layers are provided above the first electrode block, and the two light-emitting layers can be electrically connected through a CGL (Charge Generation Layer). The CGL serves as a charge generation layer and can transmit charges, so as to achieve white light emission of the light-emitting device under the action of the plurality of light-emitting layers. For example, the light emitted by the lower light-emitting layer can serve as excitation light for the upper light-emitting layer, and finally white light or light of other desired colors is obtained. The charge generation layer not only transmits charges in the vertical direction, but also generates charges for horizontal transmission, thereby forming a horizontal leakage current. In some examples, the light-emitting layer includes a charge generation layer, the charge generation layer breaks at the position of the edge of the pixel defining layer, and the charge generation layer can break under the action of a large step difference at the edge of the pixel defining layer. In addition, the provision of the second recess can increase the step difference slope of the edge of the pixel defining layer, further strengthen the breaking effect of the charge generation layer at the edge of the pixel defining layer, and thereby block or weaken the transmission of the horizontal leakage current, thereby improving the color mixing problem.

[0194] FIG. 8 is a schematic partial structure diagram of yet another display panel according to an embodiment of the present disclosure. Illustratively, referring to FIG. 8, the second groove 202 is disposed on the side of the pixel defining layer 220, the second groove 202 is a transverse groove, the opening of the second groove 202 faces the side where the pixel opening 201 is located, and the opening edge of the second groove 202 away from the side of the driving substrate 100 is flush with the opening edge of the second groove 202 close to the side of the driving substrate 100, which can save the etching process flow. The second groove 202 can be prepared by over-etching or selective etching.

[0195] In some examples, the distance between the two adjacent first electrode blocks 211 is greater than or equal to 0.4 μm and less than 1 μm, for example, it can be 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm or 0.9 μm. By disposing the second groove 202 on the edge side of the pixel defining layer 220, the distance between the adjacent first electrode blocks 211 can be compressed, and the distance between the two adjacent first electrode blocks 211 can be limited to within 1 μm, which can greatly improve the pixel resolution. By setting the distance between the two adjacent first electrode blocks 211 to be greater than or equal to 0.4 μm, sufficient space can be ensured between the first electrode blocks to avoid cross-color problems caused by too close distance between the first electrode blocks.

[0196] In some examples, when the first sub-groove 224 is disposed on the pixel defining layer, the distance between the two adjacent first sub-grooves 224 is greater than or equal to 0.2 μm. That is, the distance between the two first sub-grooves 224 in the region between the same two first electrode blocks 211 is greater than or equal to 0.2 μm, which can ensure that the distance between the adjacent pixels is sufficient to avoid cross-color problems. By disposing double grooves between the adjacent first electrode blocks 211, that is, disposing at least two first sub-grooves 224 in the region between the two adjacent first electrode blocks 211, the surface area of the pixel defining layer 220 can be greatly increased, which can further increase the transmission path of the lateral leakage current in the light-emitting layer, thereby dissipating the lateral leakage current and improving the cross-color problem.

[0197] In some examples, the pixel defining layer 220 can include an inorganic material layer, which has higher hardness than the organic material and forms a step that is more conducive to blocking the charge transport layer in the light-emitting layer, thereby improving the cross-color.

[0198] FIG. 9 is a schematic partial structure diagram of yet another display panel according to an embodiment of the present disclosure. Illustratively, referring to FIG. 9, the opening edge of the second groove 202 close to the side of the driving substrate 100 exceeds the opening edge of the second groove 202 away from the side of the driving substrate 100, which can better protect the edge of the first electrode block 211 and avoid short circuit between the first electrode block 211 and the cathode.

[0199] For example, referring to FIG. 9, the first sub-protrusion 222 has a protrusion height of a first height h01, the second recess 202 has a size along the first direction H of a second height h02, and the second recess 202 has a groove depth of a third height h03. The first height h01 is less than the second height h02, and the first height h01 is less than the third height h03. The flatness of the film layer above the pixel definition layer can be avoided from being affected by the first sub-protrusion 222, and the conductive layer in the light-emitting layer can be sufficiently separated by the second recess 202.

[0200] In some embodiments, the pixel definition layer includes a first definition layer, a second definition layer, and a third definition layer arranged in a stack, the second definition layer is located between the first definition layer and the third definition layer, and the first definition layer is located between the driving substrate and the second definition layer. A side surface of the second definition layer close to the pixel opening is a groove bottom of the second recess, a side of the first definition layer close to the pixel opening is located in a partial slot of the second recess, and a side of the third definition layer close to the pixel opening is located in a partial slot of the second recess.

[0201] For example, the first definition layer and the third definition layer can be made of the same material, such as silicon oxide. The second definition layer can be made of a material different from that of the third definition layer, such as silicon nitride. The first definition layer and the second definition layer are made of different materials, so that the second recess can be formed by etching, and the etching liquid does not etch the first definition layer and the second definition layer during etching of the second definition layer.

[0202] For example, the first definition layer and the third definition layer can be made of different materials. The second definition layer can be made of a material different from that of the first definition layer.

[0203] FIG. 10 is a schematic partial structure diagram of a display panel provided by an embodiment of the present disclosure. For example, referring to FIG. 10, the pixel definition layer 220 includes a first definition layer 203, a second definition layer 204, and a third definition layer 205. The first definition layer 203 is arranged close to the driving substrate 100, the third definition layer 205 is arranged away from the driving substrate 100, and the second definition layer 204 is arranged between the first definition layer 203 and the third definition layer 205. The end surface of the second definition layer 204 facing the pixel opening 201 can be etched to form a step between the end surface of the second definition layer 204 facing the pixel opening 201 and the end surface of the first definition layer 203 and the third definition layer 205, so as to obtain the second recess 202. The end surface of the second definition layer 204 facing the pixel opening 201 can be used as the groove bottom of the second recess 202, the end surface of the first definition layer 203 facing the pixel opening 201 can be used as a partial slot edge of the second recess 202, and the end surface of the third definition layer 205 facing the pixel opening 201 can be used as a partial slot edge of the second recess 202.

[0204] It should be noted that the pixel defining layer 220 shown in FIG. 10 is layered, which facilitates the formation of the second groove on the edge side of the pixel defining layer 220 and does not cause difficulty in the preparation process.

[0205] In some examples, referring to FIG. 10, the first micro-protruding portion points in the direction of the pixel opening, which is the second direction L. In the direction in which the first micro-protruding portion points to the pixel opening 201, i.e., in the second direction L, the side of the first defining layer 203 close to the pixel opening 201 exceeds the side of the third defining layer 205 close to the pixel opening 201, and the side of the second defining layer 204 close to the pixel opening 201. That is, the second groove 202 can be formed on the edge side of the pixel defining layer 220 close to the pixel opening 201.

[0206] In some examples, referring to FIG. 10, in the direction in which the first micro-protruding portion points to the pixel opening 201, i.e., in the second direction L, the side of the first defining layer 203 close to the pixel opening 201 exceeds the side of the third defining layer 205 close to the pixel opening 201. The edge of the orthographic projection of the third defining layer 205 on the driving substrate 100 falls within the orthographic projection of the first defining layer 203 on the driving substrate 100, and the edge of the orthographic projection of the second defining layer 204 on the driving substrate 100 falls within the orthographic projection of the third defining layer 205 on the driving substrate 100. The first defining layer 203 covers more of the edge of the first electrode block 211 than the third defining layer 205, the first defining layer 203 directly covers the edge of the first electrode block 211, and the first defining layer 203 is closest to the first electrode block 211. The protection of the first electrode block 211 by the first defining layer 203 is more direct, and the first defining layer 203 can protect the first electrode block 211 from being short-circuited or eroded.

[0207] In some embodiments, the protruding height of the first micro-protruding portion is less than or equal to the thickness of the second defining layer. For example, the protruding height of the first sub-protruding portion and the protruding height of the second sub-protruding portion can each be less than or equal to the thickness of the second defining layer. The height of the first micro-protruding portion can be the protruding dimension of the first micro-protruding portion relative to the protruding starting edge, and the thickness of the second defining layer is the dimension of the second defining layer along the first direction H.

[0208] In some embodiments, the protruding height of the first micro-protruding portion is less than or equal to the dimension of the second groove in the first direction. The dimension of the second groove can be set to be sufficient to isolate the charge generation layer to block the transmission of the lateral leakage current.

[0209] FIG. 11 is a schematic partial top view of another display panel provided by an embodiment of the present disclosure. As shown in FIG. 11, in the orthographic projection on the driving substrate, the orthographic projection boundary of the first defining layer 203 coincides with the orthographic projection boundary of the pixel opening 201 on the side close to the driving substrate. The dashed lines shown in FIG. 11 are used to represent the orthographic projection edges of the second defining layer 204 and the third defining layer 205.

[0210] For example, in combination with FIGS. 10 and 11, the edge of the first defining layer 203 can serve as the boundary of the pixel opening 201 near the end of the driving substrate, and the edge of the third defining layer 205 can serve as the boundary of the pixel opening away from the end of the driving substrate.

[0211] In some examples, referring to FIG. 11, the edge of the second defining layer 204 in the orthographic projection on the driving substrate surrounds the edge of the third defining layer 205 in the orthographic projection on the driving substrate; the edge of the third defining layer 205 in the orthographic projection on the driving substrate surrounds the edge of the first defining layer 203 in the orthographic projection on the driving substrate.

[0212] In some examples, referring to FIG. 11, the distance between the orthographic projection of the third defining layer 205 on the driving substrate and the orthographic projection of the first defining layer 203 on the driving substrate is a twelfth distance h12, and the twelfth distance h12 is greater than or equal to 50 nm.

[0213] In some examples, referring to FIG. 11, the distance between the orthographic projection of the third defining layer 205 on the driving substrate and the orthographic projection of the second defining layer 204 on the driving substrate is a thirteenth distance h13, and the thirteenth distance h13 can range from 50 nm to 150 nm.

[0214] In some examples, referring to FIG. 11, the distance between the orthographic projection of the second defining layer 204 on the driving substrate and the orthographic projection of the side of the first electrode block 211 away from the driving substrate is a fourteenth distance h14, and the fourteenth distance h14 can be greater than 100 nm.

[0215] In some embodiments, the side of the pixel defining layer away from the driving substrate is provided with a third groove, and the slot of the third groove faces away from the driving substrate, and the third groove is located in the region between adjacent first electrode blocks. The slot of the third groove can face the display direction, and the third groove can be formed on the side of the pixel defining layer away from the driving substrate by etching. The orthographic projection of the third groove on the driving substrate does not overlap with the orthographic projection of the first electrode block on the driving substrate.

[0216] In some examples, the light-emitting layer includes a charge generation layer, and the charge generation layer is broken at the position of the slot of the fourth groove. The third groove can be used to isolate the charge generation layer, and the charge generation layer can be broken at the position of the slot of the fourth groove to block the transmission of lateral leakage current and improve the problem of color mixing.

[0217] In some examples, in the wire direction of the adjacent first electrode blocks, the size of the slot of the third groove is smaller than the size of the groove body, and the groove body of the third groove is located between the slot and the groove bottom. The slot of the third groove is arranged away from the driving substrate, and the groove bottom of the third groove is arranged close to the driving substrate. The caliber of the slot of the third groove is smaller than the inner diameter of the groove body, and an undercut structure can be formed on the inner wall of the third groove, which can further facilitate the fracture of the charge generation layer under the action of the third groove and block the transmission of the lateral leakage current. In the wire direction of the adjacent first electrode blocks, the size of the third groove away from the driving substrate is smaller than the size of the third groove close to the driving substrate, that is, the third groove can be a groove with a narrow upper part and a wide lower part.

[0218] FIG. 12 is a schematic partial structure diagram of another display panel provided by an embodiment of the present disclosure. For example, referring to FIG. 12, the third groove 206 is arranged in the region between the two adjacent first electrode blocks 211. In the second direction L, the size of the third groove 206 away from the driving substrate 100 is smaller than the size of the third groove close to the driving substrate 100, and an undercut structure can be formed on the inner wall of the third groove 206, which is more conducive to blocking the charge generation layer.

[0219] For example, referring to FIG. 12, the size of the third groove 206 away from the driving substrate 100 is R1, and the size of the third groove 206 close to the driving substrate 100 is R2, and R1 is smaller than R2.

[0220] In some embodiments, the pixel defining layer includes a first defining layer, a second defining layer and a third defining layer arranged in layers. The third defining layer includes a first hollow, and the second defining layer includes a second hollow. The first hollow and the second hollow are in communication, and both are located between the two adjacent first electrode blocks. In the wire direction of the two adjacent first electrode blocks, the size of the second hollow is larger than the size of the first hollow. The first hollow can penetrate through the third defining layer, the second hollow can penetrate through the second defining layer, the inner diameter of the first hollow is smaller than the inner diameter of the second hollow, and the arrangement of the first hollow and the second hollow can form a third groove on the side of the pixel defining layer away from the driving substrate.

[0221] FIG. 13 is a schematic partial structure diagram of another display panel provided by an embodiment of the present disclosure. For example, referring to FIG. 13, in the second direction L, the size of the first hollow 207 is smaller than the size of the second hollow 208, and an undercut structure can be formed. After the first hollow 207 and the second hollow 208 are in communication, part of the surface of the first defining layer 203 away from the driving substrate 100 can be exposed, and part of the surface of the first defining layer 203 away from the driving substrate 100 can serve as the groove bottom of the third groove 206. The first hollow 207 is located close to the slot of the third groove 206, and the second hollow 208 can form the groove body of the third groove 206.

[0222] In some examples, referring to FIG. 13, in the case that the pixel defining layer includes the first sub-recess 224, the ratio of the groove depth of the third recess 206 to the groove depth of the first sub-recess 224 in the first direction H is greater than 1, i.e., the groove depth of the third recess 206 is greater than the groove depth of the first sub-recess 224, which can better isolate the charge generation layer.

[0223] For example, referring to FIG. 13, the groove depth of the third recess 206 can be the sum of the depths of the first hollow 207 and the second hollow 208.

[0224] In some embodiments, the fourth recess is arranged on the side of the first defining layer away from the driving substrate, and the fourth recess is in communication with the second hollow; in the direction of the connecting line between two adjacent first electrode blocks, the size of the second hollow is greater than the size of the fourth recess. The fourth recess can be obtained by etching the first defining layer, and the first hollow, the second hollow and the fourth recess can form the third recess, and the groove bottom of the fourth recess can serve as the groove bottom of the third recess. In the second direction, the size of the fourth recess can be less than the size of the first hollow, or the size of the fourth recess can be equal to the size of the first hollow. The arrangement of the fourth recess can increase the depth of the third recess, increase the step value generated by the pixel defining layer, and thus strengthen the isolation effect on the charge generation layer.

[0225] In some embodiments, the edge of the fourth recess in the orthographic projection on the driving substrate at least partially overlaps with the edge of the first hollow in the orthographic projection on the driving substrate. For example, the groove opening of the fourth recess can be flush with or partially flush with the inner wall of the first hollow.

[0226] In some embodiments, the orthographic projection of the fourth recess on the driving substrate falls within the orthographic projection of the first hollow on the driving substrate. The inner diameter of the fourth recess is greater than the inner diameter of the first hollow.

[0227] FIG. 14 is a schematic partial structure diagram of another display panel provided by an embodiment of the present disclosure. For example, referring to FIG. 14, the inner wall of the fourth recess 209 is flush with the inner wall of the first hollow 207, i.e., the orthographic projection of the fourth recess 209 on the driving substrate 100 is flush with the edge of the orthographic projection of the first hollow 207 on the driving substrate 100. The fourth recess 209, the second hollow 208 and the first hollow 207 are in communication to form the third recess. The arrangement of the fourth recess 209 can increase the groove depth of the third recess, increase the film layer step formed by the third recess, and strengthen the isolation effect on the charge generation layer.

[0228] FIG. 15 is a schematic partial structure diagram of a display panel according to an embodiment of the present disclosure. As an example, referring to FIG. 15, the inner wall of the fourth groove 209 is flush with the inner wall of the second hollow 208, that is, the orthographic projection of the fourth groove 209 on the driving substrate 100 is flush with the edge of the orthographic projection of the second hollow 208 on the driving substrate 100. The depth of the undercut can be increased, and thus the blocking effect of the charge generation layer can be increased.

[0229] As an example, the edge of the orthographic projection of the fourth groove on the driving substrate can be located between the edge of the orthographic projection of the first hollow on the driving substrate and the edge of the orthographic projection of the second hollow on the driving substrate.

[0230] FIG. 16 is a schematic partial structure diagram of another display panel according to an embodiment of the present disclosure. As an example, referring to FIG. 16, the pixel defining layer 220 can be provided with the second groove 202 and the third groove 206 at the same time, which can have a double blocking effect on the charge generation layer.

[0231] In some examples, referring to FIG. 13, in the second direction L along the connecting direction between the two adjacent first electrode blocks 211, the difference between the size of the second hollow 208 and the size of the first hollow 207 can range from 50 nm to 150 nm.

[0232] In some examples, referring to FIG. 13, the distance between the orthographic projection of the second hollow 208 on the driving substrate and the orthographic projection of the side of the first electrode block 211 away from the driving substrate 100 on the driving substrate 100 is greater than 100 nm.

[0233] In some examples, the edge of the orthographic projection of the second hollow on the driving substrate is flush with the edge of the orthographic projection of the first electrode block on the driving substrate.

[0234] In some embodiments, the surface shape of the side of the second defining layer away from the driving substrate can match the surface shape of the side of the third defining layer away from the driving substrate. The undulating shape of the surface of the side of the third defining layer away from the driving substrate can be formed by the undulating shape of the surface of the side of the second defining layer away from the driving substrate. The surface shape of the side of the second defining layer and the side of the third defining layer away from the driving substrate can also be formed by etching.

[0235] In some embodiments, the surface shape of the side of the first defining layer away from the driving substrate can match the surface shape of the side of the second defining layer away from the driving substrate. The undulating shape of the surface of the side of the second defining layer away from the driving substrate can be determined by the undulating shape of the surface of the side of the first defining layer away from the driving substrate. The undulating shape of the surface of the side of the first defining layer away from the driving substrate can be formed by the difference of the edge of the first electrode block; the shape of the surface of the side of the first defining layer away from the driving substrate can also be formed by etching.

[0236] In some examples, the first defining layer is provided with a third sub-protrusion on the side away from the driving substrate, and the orthographic projection of the first micro-protrusion on the driving substrate overlaps with the orthographic projection of the third sub-protrusion on the driving substrate. The first micro-protrusion can be formed under the influence of the third sub-protrusion.

[0237] In some examples, the first defining layer is provided with a fifth groove and a second slope on the side away from the driving substrate, and the orthographic projection of the first sub-groove on the driving substrate overlaps with the orthographic projection of the fifth groove on the driving substrate. The first sub-groove can be formed under the influence of the fifth groove. The second slope can correspond to the region where the first slope is located.

[0238] In some examples, the second defining layer is provided with a fourth sub-protrusion and a third slope on the side away from the driving substrate, and the orthographic projection of the first micro-protrusion on the driving substrate overlaps with the orthographic projection of the fourth sub-protrusion on the driving substrate. The fourth sub-protrusion can be formed under the influence of the third sub-protrusion, and the first micro-protrusion can be formed under the influence of the fourth sub-protrusion. The third slope can correspond to the region where the first slope is located.

[0239] In some examples, the first micro-protrusion and the first slope can be formed in the third defining layer.

[0240] In some examples, the second defining layer is provided with a sixth groove on the side away from the driving substrate, and the orthographic projection of the first sub-groove on the driving substrate overlaps with the orthographic projection of the sixth groove on the driving substrate. The fifth groove can be formed under the influence of the sixth groove, and the first sub-groove can be formed under the influence of the sixth groove.

[0241] For example, referring to FIG. 10, the third sub-protrusion includes a fifth sub-protrusion 222-1 and a sixth sub-protrusion 223-1, the fifth sub-protrusion 222-1 is arranged at a position corresponding to the first sub-protrusion 222, the sixth sub-protrusion is arranged at a position corresponding to the second sub-protrusion 223, and the fifth groove 224-1 is arranged at a position corresponding to the first sub-groove 224.

[0242] For example, referring to FIG. 10, the fourth sub-protrusion includes a seventh sub-protrusion 222-2 and an eighth sub-protrusion 223-2, the seventh sub-protrusion 222-2 is arranged at a position corresponding to the fifth sub-protrusion 222-1, the eighth sub-protrusion 223-2 is arranged at a position corresponding to the sixth sub-protrusion 223-1, and the sixth groove 224-2 is arranged at a position corresponding to the fifth groove 224-1.

[0243] In some embodiments, the light-emitting layer is provided with a second protrusion on the side away from the driving substrate, and the area between adjacent first electrode blocks is provided with at least two second protrusions; the orthographic projection of the second protrusion on the driving substrate covers the edge of the orthographic projection of the first electrode block on the driving substrate. The second protrusion can be a protrusion formed due to the step difference of the edge of the first electrode block. The surface shape of the light-emitting layer on the side away from the driving substrate can change with the surface relief of the pixel defining layer on the side away from the driving substrate. The surface shape of the cathode on the side away from the driving substrate can match the surface shape of the light-emitting layer on the side away from the driving substrate.

[0244] In some embodiments, the light-emitting layer is provided with a first recess and a second recess on the side away from the driving substrate, and the second protrusion is located between the first recess and the second recess; in the direction in which the pixel defining layer points to the pixel opening, the second recess is closer to the pixel opening relative to the first recess. The second recess can be formed in the edge region of the pixel defining layer, and the second recess is formed with the boundary step difference of the pixel defining layer, and the second recess corresponds to the boundary of the pixel opening. The first recess corresponds to the position of the first sub-groove.

[0245] In some embodiments, the light-emitting layer is provided with a third protrusion on the side away from the driving substrate, the first recess is located between the second protrusion and the third protrusion, and the protrusion height of the third protrusion is less than the protrusion height of the second protrusion; the light-emitting layer includes a third structure and a fourth structure, the second recess is connected between the fourth structure and the second protrusion, and the third protrusion is connected between the first recess and the third structure; the orthographic projection of the fourth structure on the driving substrate falls within the orthographic projection of the pixel opening on the driving substrate, and the orthographic projection of the third structure on the driving substrate does not overlap with the orthographic projection of the first electrode block on the driving substrate. The third structure can be provided corresponding to the first structure, and the fourth structure can be provided corresponding to the second structure.

[0246] In some examples, the area between two adjacent first electrode blocks is provided with at least two second protrusions, at least two first micro-protrusions, and at least two first recesses.

[0247] FIG. 17 is a schematic partial structure diagram of another display panel provided by an embodiment of the present disclosure. For example, referring to FIG. 17, the light-emitting layer 230 is provided with a second protruding portion 231, a first recessed portion 232, a second recessed portion 233, a third protruding portion 234, a third structural portion 235, and a fourth structural portion 236 away from the side of the driving substrate 100. The second protruding portion 231 is connected between the first recessed portion 232 and the second recessed portion 233, the first recessed portion 232 is connected between the third protruding portion 234 and the second protruding portion 231, the third protruding portion 234 is connected between the first recessed portion 232 and the third structural portion 235, and the second recessed portion 233 is connected between the second protruding portion 231 and the third structural portion 235. The fourth structural portion 236 corresponds to the position of the pixel opening 201, and the third structural portion 235 corresponds to the region between the two adjacent first electrode blocks 211. The second protruding portion 231 corresponds to the region where the second structural portion 226 is located, the third protruding portion 234 corresponds to the position of the first sub-protruding portion 222, the first recessed portion 232 corresponds to the position of the first sub-recessed groove 224, and the second recessed portion 233 is located in the edge region of the pixel defining layer 220.

[0248] In some examples, referring to FIG. 17, the curvature change rate of the second recessed portion 233 is greater than the curvature change rate of the first recessed portion 232. That is, the recessed amplitude of the second recessed portion 233 is greater than the recessed amplitude of the first recessed portion 232. Since the film layer step difference amplitude of the pixel defining layer 220 in the edge region is greater than the groove depth of the first sub-recessed groove 224, in addition, due to the setting of the second recessed groove, the recessed amplitude of the second recessed portion 233 is increased.

[0249] In some examples, referring to FIG. 17, in the first direction H, the vertical distance between the side surface away from the driving substrate 100 of the third structural portion 235 and the lower surface of the first electrode block 211 is a seventh distance h7, the vertical distance between the side surface away from the driving substrate 100 of the fourth structural portion 236 and the lower surface of the first electrode block 211 is an eighth distance h8, and the distance between the side surface away from the driving substrate 100 of the second protruding portion 231 and the first electrode block 211 is a ninth distance h9; the eighth distance h8 is less than the ninth distance h9, the seventh distance h7 is less than the ninth distance h9, and the seventh distance h7 is greater than the seventh distance h7.

[0250] In some examples, referring to FIG. 17, the topography of the second electrode layer 240 matches the topography of the light-emitting layer 230, and the recessed and protruding structures of the second electrode layer 240 are not described here.

[0251] In some embodiments, the light-emitting layer is provided with a second protruding portion, a first recessed portion and a second recessed portion on a side away from the driving substrate, the area between adjacent first electrode blocks is provided with at least two second protruding portions, the second protruding portion is located between the first recessed portion and the second recessed portion, and in a direction in which the pixel defining layer points to the pixel opening, the second recessed portion is closer to the pixel opening relative to the first recessed portion; the orthographic projection of the second protruding portion on the driving substrate covers the edge of the orthographic projection of the first electrode block on the driving substrate; and the curvature change rate of the first recessed portion is greater than the curvature change rate of the second recessed portion.

[0252] FIG. 18 is a schematic partial structural diagram of another display panel according to an embodiment of the present disclosure. As an example, referring to FIG. 18, the pixel defining layer 220 is provided with a third groove 206, a first sub-groove 224, a first sub-protruding portion 222 and a second sub-protruding portion 223. The light-emitting layer 230 is provided with a second protruding portion 231, a first recessed portion 232 and a second recessed portion 233 on a side away from the driving substrate 100, the second protruding portion 231 corresponds to the second structural portion 226, and the second protruding portion 231 is formed by the edge of the first electrode block 211 and the heightening of the second structural portion 226. The first recessed portion 232 corresponds to the notch edge region of the third groove 206, and the first recessed portion 232 is formed by the difference in level of the notch edge of the third groove 206. The second recessed portion 233 is formed by the difference in level of the edge of the pixel defining layer 220. The area between two adjacent first electrode blocks 211 can be provided with two first recessed portions 232. The recessed amplitude of the first recessed portion 232 is greater than the recessed amplitude of the second recessed portion 233.

[0253] In some embodiments, the light-emitting layer is provided with a third protruding portion and a third recessed portion on a side away from the substrate, the third recessed portion is connected between the second protruding portion and the third protruding portion, the protruding height of the third protruding portion is less than the protruding height of the second protruding portion, and the curvature change rate of the second recessed portion is greater than the curvature change rate of the third recessed portion. The third recessed portion corresponds to the area where the first sub-groove is located, the third protruding portion corresponds to the area where the first sub-protruding portion is located, and the second protruding portion corresponds to the area where the second sub-protruding portion is located. If the difference in level of the edge of the pixel defining layer is greater than the groove depth of the first sub-groove, then the curvature change amplitude of the second recessed portion is greater than the curvature change amplitude of the third recessed portion.

[0254] FIG. 19 is a schematic partial structure diagram of a display panel according to an embodiment of the present disclosure. As an example, referring to FIG. 19, the light-emitting layer 230 includes a third structure portion 235 and a fourth structure portion 236, the second recessed portion 233 is connected between the fourth structure portion 236 and the second protruding portion 231, and the first recessed portion 232 is connected between the third protruding portion 234 and the third structure portion 235; the orthographic projection of the fourth structure portion 236 on the driving substrate 100 falls within the orthographic projection of the pixel opening 201 on the driving substrate 100, and the orthographic projection of the third structure portion 235 on the driving substrate 100 does not overlap with the orthographic projection of the first electrode block 211 on the driving substrate. In the first direction H, the vertical distance between the side surface away from the driving substrate 100 of the third structure portion 235 and the lower surface of the first electrode block 211 is a seventh distance h7, the vertical distance between the side surface away from the driving substrate 100 of the fourth structure portion 236 and the lower surface of the first electrode block 211 is an eighth distance h8, the distance between the side surface away from the driving substrate 100 of the second protruding portion 231 and the first electrode block 211 is a ninth distance h9, and the distance between the side surface away from the driving substrate 100 of the third protruding portion 234 and the first electrode block 211 is a tenth distance h10; the eighth distance h8 is greater than the seventh distance h7, the tenth distance h10 is greater than the eighth distance h8, and the ninth distance h9 is greater than the tenth distance h10.

[0255] In some examples, referring to FIG. 19, the topography of the second electrode layer 240 matches the topography of the light-emitting layer 230, and the recessed and protruding structures of the second electrode layer 240 are not described herein.

[0256] In some embodiments, the light-emitting layer includes a charge generation layer and at least two layers of light-emitting material layers, and the charge generation layer is connected between two adjacent layers of light-emitting material layers; the topography of the charge generation layer can change with the topography of the pixel defining layer.

[0257] FIG. 20 is a schematic partial structure diagram of a display panel provided by an embodiment of the present disclosure. In some examples, referring to FIG. 20, the light-emitting layer 230 includes a charge generation layer 250, the charge generation layer 250 is provided with a fourth protruding portion 251 and a fifth protruding portion 252 away from one side of the driving substrate 100, the orthographic projection of the fourth protruding portion 251 on the driving substrate overlaps with the orthographic projection of the first sub-protruding portion 222 on the driving substrate, and the orthographic projection of the fifth protruding portion 252 on the driving substrate overlaps with the orthographic projection of the second sub-protruding portion 223 on the driving substrate 100. In the case where the pixel definition layer 220 is provided with the first sub-recess 224, the charge generation layer 250 is provided with a fourth recessed portion 253 away from one side of the driving substrate 100, the orthographic projection of the fourth recessed portion 253 on the driving substrate 100 overlaps with the orthographic projection of the first sub-recess 224 on the driving substrate 100, and the fourth recessed portion 253 is connected between the fourth protruding portion 251 and the fifth protruding portion 252. The charge generation layer 250 includes a fifth recessed portion 254, the charge generation layer 250 is broken at the position of the fifth recessed portion 254, and the fifth recessed portion 254 is arranged at the slot edge region of the second recess 202, i.e., the fifth recessed portion 254 is located at the edge step region of the pixel definition layer 220.

[0258] In some examples, referring to FIG. 20, the charge generation layer 250 includes a fifth structural portion 255 and a sixth structural portion 256, the fourth protruding portion 251 is connected between the fifth structural portion 255 and the fourth recessed portion 253, the fourth recessed portion 253 is connected between the fifth protruding portion 252 and the fourth protruding portion 251, the fifth recessed portion 254 is located between the fifth protruding portion 252 and the sixth structural portion 256, and the fifth protruding portion 252 and the sixth structural portion 256 are disconnected. The orthographic projection of the sixth structural portion 256 on the driving substrate 100 falls within the orthographic projection of the pixel opening 201 on the driving substrate 100, and the orthographic projection of the fifth structural portion 255 on the driving substrate 100 does not overlap with the orthographic projection of the first electrode block 211 on the driving substrate 100.

[0259] In some examples, referring to FIG. 20, in the first direction H, the vertical distance between the side surface away from the driving substrate 100 of the fifth structural portion 255 and the lower surface of the first electrode block 211 is an eleventh distance h11, the vertical distance between the side surface away from the driving substrate 100 of the sixth structural portion 256 and the lower surface of the first electrode block 211 is a twelfth distance h12, and the distance between the side surface away from the driving substrate 100 of the fourth protruding portion 251 and the first electrode block 211 is a thirteenth distance h13; the eleventh distance h11 is greater than the twelfth distance h12, and the thirteenth distance h13 is greater than the eleventh distance h11.

[0260] Referring to FIG. 20, the edge side of the pixel defining layer 220 is provided with the second groove 202, so that the charge generation layer 250 forms the fifth recessed portion 254, and the charge generation layer 250 is broken at the position where the fifth recessed portion 254 is located, so as to better isolate the charge generation layer 250, to block the lateral leakage current in the charge generation layer 250, and to improve the cross-color problem between adjacent pixels. The second groove 202 is arranged on the edge side of the pixel defining layer 220, so as to strengthen the isolation effect of the charge generation layer 250 by means of the film layer step difference of the pixel defining layer edge, to compress the size of the pixel defining layer 220 in the second direction, and to further compress the spacing between adjacent first electrode blocks 211, so as to improve the resolution of the display panel. In addition, the arrangement of the first sub-groove, the first sub-groove 224, the first sub-protrusion 222 and the second sub-protrusion 223 can increase the surface area of the pixel defining layer 220 away from the drive substrate 100; the charge generation layer 250 is arranged above the pixel defining layer 220, and the topography of the charge generation layer 250 can change with the topography of the pixel defining layer 220 along with the concave-convex fluctuation of the pixel defining layer 220, so that the charge generation layer 250 can obtain the fourth protrusion 251, the fifth protrusion 252 and the fourth recessed portion 253, the surface area of the charge generation layer 250 is increased, the transmission path length of the lateral leakage current is further increased, and the lateral leakage current is dissipated in a longer transmission process, so as to reduce the lateral leakage current and improve the cross-color problem.

[0261] FIG. 21 is a schematic partial structural view of another display panel provided by an embodiment of the present disclosure. In some examples, referring to FIG. 21, the charge generation layer 250 is provided with a fourth protruding portion 251 and a fifth protruding portion 252 away from one side of the driving substrate 100, the fourth protruding portion 251 has an overlapping projection on the driving substrate 100 with the first sub-protruding portion 222, and the fifth protruding portion 252 has an overlapping projection on the driving substrate 100 with the second sub-protruding portion 223. In the case where the pixel definition layer 220 is provided with the first sub-recess 224, the charge generation layer 250 is provided with a fourth recessed portion 253 away from one side of the driving substrate 100, the fourth recessed portion 253 has an overlapping projection on the driving substrate 100 with the first sub-recess 224, and the fourth recessed portion 253 is connected between the fourth protruding portion 251 and the fifth protruding portion 252. The charge generation layer 250 includes a fifth recessed portion 254, the charge generation layer 250 is broken at the position of the fifth recessed portion 254, and the fifth recessed portion 254 is arranged in the area where the second recess 202 is arranged, i.e., the fifth recessed portion 254 is located in the edge step region of the pixel definition layer 220. The charge generation layer 250 includes a sixth recessed portion 257, the charge generation layer 250 is broken at the position of the sixth recessed portion 257, and the sixth recessed portion 257 is arranged in the slot edge region of the third recess 206, i.e., the third recess 206 separates the charge generation layer 250 by a step.

[0262] In some examples, referring to FIG. 20, the charge generation layer 250 includes a fifth structure portion 255 and a sixth structure portion 256, and the fifth structure portion 255 is disconnected with the sixth structure portion 256. The sixth structure portion 256 has a projection on the driving substrate 100 falling within the projection on the driving substrate 100 of the pixel opening 201, and the fifth structure portion 255 has no overlapping projection on the driving substrate 100 with the first electrode block 211.

[0263] Referring to FIG. 21, a third groove 206 is arranged in the middle region of the pixel defining layer 220, the third groove 206 is located in the region between adjacent first electrode blocks 211. The third groove 206 is arranged to further increase the step difference of the pixel defining layer 220 at the position of the third groove 206 by means of the step difference formed by the first electrode blocks 211 on the pixel defining layer 220, so as to break the charge generation layer 250 at the notch position of the third groove 206 to block the transmission of the lateral leakage current and improve the color cast problem. In addition, the step difference of the edge region of the pixel defining layer 220 can also cause the breakage of the charge generation layer 250, and the charge generation layer 250 between adjacent first electrode blocks 211 generates four breakage positions, which can better block the lateral leakage current. The first sub-groove 224, the first sub-protrusion 222 and the second sub-protrusion arranged on the pixel defining layer 220 can increase the surface area of the pixel defining layer 220 away from the driving substrate 100; the charge generation layer 250 arranged above the pixel defining layer 220 can follow the ups and downs of the pixel defining layer 220, and the topography of the charge generation layer 250 can change with the topography of the pixel defining layer 220, so that the charge generation layer 250 can obtain a fourth protrusion 251, a fifth protrusion 252 and a fourth recess 253. The surface area of the charge generation layer 250 is increased, the transmission path length of the lateral leakage current is further increased, and the lateral leakage current is dissipated in the longer transmission process, thereby reducing the lateral leakage current and improving the color cast problem.

[0264] In addition, the protrusion of the pixel defining layer can also protect the anode and avoid puncture short circuit between the anode and the cathode.

[0265] In some examples, the protrusion provided by the present disclosure can include an arc-shaped protrusion.

[0266] In some examples, the recess provided by the present disclosure can include an arc-shaped recess.

[0267] In some examples, a seventh groove is arranged on the side of the driving substrate close to the first electrode layer, and the seventh groove is located in the region between two adjacent first electrode blocks.

[0268] For example, the seventh groove can be formed in the passivation layer or other top insulating layer of the driving substrate.

[0269] In a second aspect, the present disclosure provides a display device, and FIG. 22 is a schematic structural block diagram of a display device provided by an embodiment of the present disclosure. As shown in FIG. 22, the display device includes the display panel 1000 provided by the first aspect.

[0270] The display device provided by the embodiments of the present disclosure can include a television, a computer, a smart phone, a smart wearable device, a notebook computer, a tablet computer, and the like. The smart wearable device can include a smart watch, an AR (Augmented Reality) device, a VR (Virtual Reality) device, and the like.

[0271] Referring to FIG. 20, the display device provided by the present disclosure can make the charge generation layer 250 form a fifth recessed portion 254 by arranging the second groove 202 on the edge side of the pixel defining layer 220 of the display panel, and the charge generation layer 250 can be better blocked at the position where the fifth recessed portion 254 is located, so as to block the lateral leakage current in the charge generation layer 250 and improve the cross-color problem between adjacent pixels. By arranging the second groove 202 on the edge side of the pixel defining layer 220, the blocking effect of the charge generation layer 250 can be enhanced by means of the film layer step difference of the pixel defining layer edge, the size of the pixel defining layer 220 in the second direction can be compressed, and the distance between adjacent first electrode blocks 211 can be further compressed, so as to improve the resolution of the display panel. In addition, the arrangement of the first sub-groove, the first sub-groove 224, the first sub-protrusion 222 and the second sub-protrusion 223 can increase the surface area of the pixel defining layer 220 away from the driving substrate 100; the charge generation layer 250 is arranged above the pixel defining layer 220, and the topography of the charge generation layer 250 can change with the topography of the pixel defining layer 220 along with the concave-convex fluctuation of the pixel defining layer 220, so that the charge generation layer 250 can obtain a fourth protrusion 251, a fifth protrusion 252 and a fourth recessed portion 253, the surface area of the charge generation layer 250 is increased, the transmission path length of the lateral leakage current is further reduced, and the lateral leakage current is dissipated in a longer transmission process, thereby reducing the lateral leakage current and improving the cross-color problem.

[0272] Referring to FIG. 21, the display device provided by the present disclosure sets a third groove 206 in the middle region of the pixel defining layer 220 of the display panel, the third groove 206 is located in the region between adjacent first electrode blocks 211, and the setting of the third groove 206 can further increase the larger step difference of the pixel defining layer 220 at the position of the third groove 206 by means of the step difference formed by the first electrode blocks 211 on the pixel defining layer 220, so as to further make the charge generation layer 250 break at the notch position of the third groove 206, so as to block the transmission of the lateral leakage current and improve the color mixing problem. In addition, the step difference of the edge region of the pixel defining layer 220 can also cause the breakage of the charge generation layer 250, and the charge generation layer 250 between adjacent first electrode blocks 211 generates four breakage positions, which can better block the lateral leakage current. The first sub-groove 224, the first sub-protrusion 222 and the second sub-protrusion of the pixel defining layer 220 can increase the surface area of the pixel defining layer 220 away from the driving substrate 100; the charge generation layer 250 is arranged above the pixel defining layer 220, and the topography of the charge generation layer 250 can change with the topography of the pixel defining layer 220, so that the charge generation layer 250 can obtain a fourth protrusion 251, a fifth protrusion 252 and a fourth recess 253. The surface area of the charge generation layer 250 is increased, the transmission path length of the lateral leakage current is further increased, and the lateral leakage current is dissipated in a longer transmission process, thereby reducing the lateral leakage current and improving the color mixing problem.

[0273] In addition, the protrusion of the pixel defining layer can also protect the anode and avoid the piercing short circuit between the anode and the cathode.

[0274] In a third aspect, the present disclosure provides a preparation method of a display panel. The preparation method of the display panel comprises:

[0275] S1: preparing a driving substrate, wherein the driving substrate comprises a plurality of pixel circuits.

[0276] For example, the driving substrate can further comprise a driving circuit and a signal line, and the pixel circuit can comprise a transistor.

[0277] S2: arranging a first electrode layer on one side of the driving substrate, wherein the first electrode layer comprises a plurality of first electrode blocks, the orthographic projections of different first electrode blocks on the driving substrate do not overlap, and the first electrode blocks are electrically connected to the pixel circuits.

[0278] For example, the first electrode blocks can be obtained by etching the first electrode layer, and the first electrode blocks can be used to independently control different light emitting devices.

[0279] S3: disposing a pixel defining layer on a side of the first electrode layer away from the driving substrate, wherein the pixel defining layer comprises a plurality of pixel openings, a normal projection of the pixel opening on the driving substrate falls within a normal projection of the first electrode block on the driving substrate, the pixel defining layer covers edges of the first electrode block, the pixel defining layer comprises a first slope portion overlapping with the edges of the first electrode block, and the first slope portion is provided with a first micro-protrusion portion at each of a side close to the driving substrate and a side away from the driving substrate.

[0280] For example, the pixel opening can be obtained by etching the pixel defining layer. The first micro-protrusion portion can be formed under the action of the edge step of the first electrode block, and the first micro-protrusion portion can also be obtained by etching the side of the pixel defining layer away from the driving substrate.

[0281] S4: sequentially disposing a light-emitting layer and a second electrode layer on a side of the pixel defining layer away from the driving substrate, wherein the light-emitting layer is disposed on the side of the pixel defining layer away from the driving substrate, and the second electrode layer is disposed on a side of the light-emitting layer away from the driving substrate.

[0282] For example, the light-emitting layer can comprise a plurality of functional film layers, such as a charge generation layer, a charge transport layer, an electron generation layer, an electron transport layer, and a light-emitting material layer.

[0283] FIG. 23 is a schematic preparation flowchart of a display panel provided by an embodiment of the present disclosure. In some embodiments, referring to FIG. 23, step S2 can comprise:

[0284] S21: disposing a first electrode layer 210 on a side of a driving substrate 100.

[0285] S22: coating a photoresist PR on a side of the first electrode layer 210 away from the driving substrate 100, and sequentially performing exposure and development to expose a part of a surface of the side of the first electrode layer 210 away from the driving substrate 100.

[0286] S23: etching the first electrode layer 210 using the photoresist PR after exposure and development as a mask to obtain a first electrode block 211.

[0287] Before step S3, step S23 can further comprise:

[0288] etching a side of the driving substrate 100 close to the first electrode layer 210 to obtain a seventh groove 211-2, wherein the seventh groove 211-2 is located in a region between two adjacent first electrode blocks 211.

[0289] The seventh groove 211-2 can be used to generate a larger film layer step at the edge of the first electrode block 211.

[0290] FIG. 24 is a schematic preparation flowchart of another display panel according to an embodiment of the present disclosure. In some embodiments, referring to FIG. 24, in the case where the pixel defining layer includes the first sub-groove, step S3 can include:

[0291] S31: disposing a first pixel defining film 203-1 on the side of the first electrode block 211 away from the driving substrate 100. The first pixel defining film 203-1 is formed with a ninth groove 224-3 in the edge region of the first electrode block 211.

[0292] removing the first pixel defining film in regions other than the region of the eighth groove, and etching the first pixel defining film in the eighth groove to obtain a ninth groove and a second slope portion, wherein the eighth groove is formed between the spaces between adjacent first electrode blocks 211 and the side surface of the first electrode block 211, the orthographic projection of the ninth groove on the driving substrate 100 overlaps the orthographic projection of the first sub-groove 224 on the driving substrate 100, and the second slope portion corresponds to the region of the first slope portion.

[0293] This step can include:

[0294] S32: coating photoresist PR on the side of the first pixel defining film 203-1 away from the driving substrate 100, and exposing and developing.

[0295] S33: using the pattern on the photoresist as a mask to etch the first pixel defining film 203-1 in regions other than the eighth groove 211-3, and etching the first pixel defining film 203-1 in the ninth groove 224-3. The first pixel defining film 203-1 on the side of the first electrode block 211 away from the driving substrate 100 can be removed, and the size of the ninth groove 224-3 can be expanded or a second slope portion can be further formed.

[0296] For example, step S33 can also be prepared using a grinding process.

[0297] Step S3 can also include:

[0298] S34: sequentially disposing a second pixel defining film 204-1 and a third pixel defining film 205-1 on the side of the etched first pixel defining film 203-1 away from the driving substrate 100.

[0299] S35: coating photoresist PR on the side of the third pixel defining film 205-1 away from the driving substrate 100, and exposing and developing.

[0300] S36: etching the third pixel defining film 205-1, the second pixel defining film 204-1 and the first pixel defining film 203-1 in sequence as a mask of the pattern on the photoresist PR, and over-etching the side surface of the second pixel defining film 204-1 to obtain the second groove 202, the first defining layer 203, the second defining layer 204 and the third defining layer 205, and form the first slope on the third defining layer 205.

[0301] Step S4 comprises:

[0302] The light-emitting layer and the second electrode layer 240 are sequentially arranged on the side of the third defining layer 205 away from the driving substrate 100, and the light-emitting layer comprises a charge generation layer 250.

[0303] In some examples, in combination with FIG. 10, step S3 can comprise:

[0304] The first pixel defining film, the second pixel defining film and the third pixel defining film are sequentially arranged on the side of the first electrode layer away from the driving substrate;

[0305] The third pixel defining film, the second pixel defining film and the first pixel defining film are etched in sequence to obtain the third defining layer, the second defining layer and the third defining layer in sequence, and form the pixel opening on the pixel defining layer, wherein the orthographic projection of the pixel opening on the driving substrate falls within the orthographic projection of the first electrode block on the driving substrate;

[0306] The side surface of the second defining layer close to the pixel opening is etched, so that in the direction in which the eighth groove points to the pixel opening, the side surface of the first defining layer 203 and the third defining layer 205 close to the pixel opening 201 both exceed the side surface of the second defining layer 204 close to the pixel opening.

[0307] Alternatively, in combination with FIG. 13, the third defining layer and the second defining layer are etched in sequence to form the first hollow 207 and the second hollow 208, wherein the first hollow communicates with the second hollow, and the first hollow and the second hollow are both located between two adjacent first electrode blocks, and in the direction of the line between the two adjacent first electrode blocks, the size of the second hollow is greater than the size of the first hollow.

[0308] The preparation method of the display panel described above is only illustrative.

[0309] The above description of certain embodiments of the disclosure has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure to the precise form described, and many modifications, variations, alterations, and equivalents can be possible, as will be apparent to one of ordinary skill in the art. The concept of the disclosure is intended to embrace all such alternatives, modifications, and variations that fall within the scope of the appended claims. In some cases, the actions recited in the claims can be performed in a different order and still achieve desirable results. Additionally, some of the processes depicted in the accompanying figures can be performed in an order other than that depicted, and still achieve desirable results. In some embodiments, multitasking and parallel processing can be advantageous.

[0310] It should be understood that the above-described embodiments are merely by way of example and illustration of the present application and are not intended to limit the present application. The present application can be carried out by other specific forms without departing from the spirit and essential characteristics of the present application. The scope of the present application should be determined only by the appended claims, and any modifications, equivalents, improvements, etc. made within the spirit and principles of one or more embodiments described in the specification should be included therein.

Claims

1. A display panel, comprising: a driving substrate comprising a plurality of pixel circuits; a light emitting device layer disposed on one side of the driving substrate, the light emitting device layer comprising a first electrode layer, a pixel defining layer, a light emitting layer, and a second electrode layer; the first electrode layer comprises a plurality of first electrode blocks, the orthographic projections of different first electrode blocks on the driving substrate do not overlap, the first electrode blocks are electrically connected to the pixel circuits, the pixel defining layer comprises a plurality of pixel openings, the orthographic projections of the pixel openings on the driving substrate fall within the orthographic projections of the first electrode blocks on the driving substrate, the pixel defining layer covers the edges of the first electrode blocks; the pixel defining layer comprises a first slope portion overlapping the edges of the first electrode blocks, the first slope portion is provided with a first micro-protrusion portion at least one of close to one end of the driving substrate and away from one end of the driving substrate; the light emitting layer is disposed on the side of the pixel defining layer away from the driving substrate, and the second electrode layer is disposed on the side of the light emitting layer away from the driving substrate.

2. The display panel of claim 1, wherein: the first micro-protrusion portion comprises a first sub-protrusion portion and a second sub-protrusion portion, the second sub-protrusion portion is connected to one end of the first slope portion away from the driving substrate, and the first sub-protrusion portion is connected to one end of the first slope portion close to the driving substrate; in a first direction, the vertical distance between the protrusion apex of the first sub-protrusion portion and the lower surface of the first electrode layer is a first distance, the vertical distance between the protrusion apex of the second sub-protrusion portion and the lower surface of the first electrode layer is a second distance, and the first direction is a direction perpendicular to the plane on which the driving substrate is located; the first distance is less than the second distance.

3. The display panel of claim 2, wherein: a first sub-groove is formed between the first slope portion and the first sub-protrusion portion.

4. The display panel of claim 3, wherein: the pixel defining layer comprises a first structure portion and a second structure portion, the first slope portion and the first micro-protrusion portion are both connected between the first structure portion and the second structure portion, the first structure portion, the second structure portion, the first sub-groove, and the first micro-protrusion portion are of an integral structure; the orthographic projection of the first structure portion on the driving substrate does not overlap with the orthographic projection of the first electrode block on the driving substrate, and the orthographic projection of the second structure portion on the driving substrate overlaps with the orthographic projection of the first electrode block on the driving substrate; in the first direction, the vertical distance between the side surface of the first structure portion away from the driving substrate and the lower surface of the first electrode layer is a third distance, and the vertical distance between the side surface of the second structure portion away from the driving substrate and the lower surface of the first electrode layer is a fourth distance, and the third distance is less than the fourth distance.

5. The display panel of claim 4, wherein: the fourth distance is greater than the first distance, and the third distance is less than the first distance.

6. The display panel of claim 3, wherein: The first sub-groove is connected to the first sub-protrusion near the notch edge of the first sub-protrusion, and is connected to the second sub-protrusion near the notch edge of the second sub-protrusion; In the first direction, the vertical distance between the notch edge of the first sub-groove near the first sub-protrusion and the lower surface of the first electrode layer is a fifth distance, and the vertical distance between the notch edge of the first sub-groove near the second sub-protrusion and the lower surface of the first electrode layer is a sixth distance, and the fifth distance is less than the sixth distance.

7. The display panel of claim 2, wherein, The first electrode block comprises a first conductive layer, a second conductive layer and a third conductive layer arranged in layers, the first conductive layer is located between the second conductive layer and the driving substrate, and the second conductive layer is located between the first conductive layer and the third conductive layer; The second conductive layer and the third conductive layer are both in the orthographic projection on the driving substrate within the orthographic projection of the first conductive layer on the driving substrate; The orthographic projection of the first sub-protrusion on the driving substrate does not overlap with the orthographic projection of the third conductive layer on the driving substrate.

8. The display panel of claim 3, wherein, The pixel defining layer is provided with a second sub-groove on the side away from the driving substrate; The size of the first sub-groove in the first direction is different from the size of the second sub-groove in the first direction; The second sub-groove is located between two adjacent first sub-grooves; The orthographic projection of the second sub-groove on the driving substrate does not overlap with the orthographic projection of the first electrode block on the driving substrate.

9. The display panel of claim 8, wherein, The orthographic projection of the first sub-groove on the driving substrate overlaps with the edge of the orthographic projection of the first electrode block on the driving substrate; The size of the first sub-groove in the first direction is smaller than the size of the second sub-groove in the first direction.

10. The display panel of any one of claims 1 to 9, wherein, The pixel defining layer comprises a first defining layer, a second defining layer and a third defining layer arranged in layers, the second defining layer is located between the first defining layer and the third defining layer, and the first defining layer is located between the driving substrate and the second defining layer; The edge of the orthographic projection of the second defining layer on the driving substrate surrounds the edge of the orthographic projection of the third defining layer on the driving substrate; The edge of the orthographic projection of the third defining layer on the driving substrate surrounds the edge of the orthographic projection of the first defining layer on the driving substrate.

11. The display panel of claim 10, wherein, The pixel defining layer is provided with a second groove on the side near the pixel opening, and the notch of the second groove faces the pixel opening; The side surface of the second defining layer near the pixel opening is the groove bottom of the second groove, the side of the first defining layer near the pixel opening is located in part of the notch of the second groove, and the side of the third defining layer near the pixel opening is located in part of the notch of the second groove; The protrusion height of the first micro-protrusion is less than or equal to the thickness of the second boundary layer; or The protrusion height of the first micro-protrusion is less than or equal to the size of the second groove in the first direction, the first direction being a direction perpendicular to the plane where the driving substrate is located.

12. The display panel according to any one of claims 1 to 9, wherein The pixel boundary layer is provided with a third groove on the side away from the driving substrate, the groove opening of the third groove faces away from the driving substrate, and the third groove is located in the region between adjacent first electrode blocks.

13. The display panel according to claim 12, wherein In the connecting direction of adjacent first electrode blocks, the size of the third groove at the end away from the driving substrate is less than the size of the third groove at the end close to the driving substrate.

14. The display panel according to claim 12, wherein In the case where the pixel boundary layer comprises a first sub-groove, the ratio of the groove depth of the third groove in the first direction to the groove depth of the first sub-groove in the first direction is greater than 1; The first direction is a direction perpendicular to the plane where the driving substrate is located.

15. The display panel according to claim 11, wherein The light-emitting layer is provided with a second protrusion on the side away from the driving substrate, and at least two second protrusions are arranged in the region between adjacent first electrode blocks; The orthographic projection of the second protrusion on the driving substrate covers the edge of the orthographic projection of the first electrode block on the driving substrate.

16. The display panel according to claim 15, wherein The light-emitting layer is provided with a first recess and a second recess on the side away from the driving substrate, and the second protrusion is located between the first recess and the second recess; In the direction in which the pixel boundary layer points to the pixel opening, the second recess is closer to the pixel opening relative to the first recess.

17. The display panel according to claim 16, wherein The curvature change rate of the second recess is greater than the curvature change rate of the first recess.

18. The display panel according to claim 16, wherein The light-emitting layer is provided with a third protrusion on the side away from the driving substrate, the first recess is located between the second protrusion and the third protrusion, and the protrusion height of the third protrusion is less than the protrusion height of the second protrusion; The light-emitting layer comprises a third structure and a fourth structure, the second recess is connected between the fourth structure and the second protrusion, and the third protrusion is connected between the first recess and the third structure; The orthographic projection of the fourth structure on the driving substrate falls within the orthographic projection of the pixel opening on the driving substrate, and the orthographic projection of the third structure on the driving substrate does not overlap with the orthographic projection of the first electrode block on the driving substrate; In the first direction, a vertical distance between the third structure part and the side surface of the driving substrate away from the lower surface of the first electrode block is a seventh distance, a vertical distance between the fourth structure part and the side surface of the driving substrate away from the lower surface of the first electrode block is an eighth distance, and a distance between the second protruding part and the first electrode block away from the side surface of the driving substrate is a ninth distance; The seventh distance is greater than the eighth distance, the seventh distance is less than the ninth distance, and the eighth distance is less than the ninth distance.

19. The display panel of claim 12, wherein, The light-emitting layer is provided with a second protruding part, a first recessed part, and a second recessed part away from the side of the driving substrate, a region between adjacent first electrode blocks is provided with at least two second protruding parts, the second protruding part is located between the first recessed part and the second recessed part, and in a direction in which the pixel defining layer points to the pixel opening, the second recessed part is closer to the pixel opening relative to the first recessed part; A normal projection of the second protruding part on the driving substrate covers an edge of a normal projection of the first electrode block on the driving substrate; A curvature change rate of the first recessed part is greater than a curvature change rate of the second recessed part.

20. The display panel of claim 16, wherein, The light-emitting layer is provided with a third protruding part and a third recessed part away from the side of the driving substrate, the third recessed part is connected between the second protruding part and the third protruding part, a protruding height of the third protruding part is less than a protruding height of the second protruding part, and a curvature change rate of the second recessed part is greater than a curvature change rate of the third recessed part; The light-emitting layer comprises a third structure part and a fourth structure part, the second recessed part is connected between the fourth structure part and the second protruding part, and the first recessed part is connected between the third protruding part and the third structure part; A normal projection of the fourth structure part on the driving substrate falls within a normal projection of the pixel opening on the driving substrate, and a normal projection of the third structure part on the driving substrate does not overlap with a normal projection of the first electrode block on the driving substrate; In the first direction, a vertical distance between the third structure part and the side surface of the driving substrate away from the lower surface of the first electrode block is a seventh distance, a vertical distance between the fourth structure part and the side surface of the driving substrate away from the lower surface of the first electrode block is an eighth distance, a distance between the second protruding part and the first electrode block away from the side surface of the driving substrate is a ninth distance, and a distance between the third protruding part and the first electrode block away from the side surface of the driving substrate is a tenth distance; The eighth distance is greater than the seventh distance, the tenth distance is greater than the eighth distance, and the ninth distance is greater than the tenth distance.

21. The display panel of any one of claims 1 to 9, wherein, The light-emitting layer comprises a charge generation layer and at least two layers of light-emitting material layers, the charge generation layer being connected between two adjacent layers of the light-emitting material layers; In the case where the first micro-protrusion part comprises a first sub-protrusion part and a second sub-protrusion part, a fourth protrusion part and a fifth protrusion part are arranged on the side of the charge generation layer away from the driving substrate, a projection of the fourth protrusion part on the driving substrate overlaps with a projection of the first sub-protrusion part on the driving substrate, and a projection of the fifth protrusion part on the driving substrate overlaps with a projection of the second sub-protrusion part on the driving substrate; In the case where the pixel boundary layer is provided with a first sub-groove, a fourth recess part and a fifth recess part are arranged on the side of the charge generation layer away from the driving substrate, a projection of the fourth recess part on the driving substrate overlaps with a projection of the first sub-groove on the driving substrate, and the fourth recess part is connected between the fourth protrusion part and the fifth protrusion part; The charge generation layer comprises a fifth structure part and a sixth structure part, the fourth protrusion part is connected between the fifth structure part and the fourth recess part, the fourth recess part is connected between the fifth protrusion part and the fourth protrusion part, and the fifth recess part is between the fifth protrusion part and the sixth structure part; A projection of the sixth structure part on the driving substrate falls within a projection of the pixel opening on the driving substrate, and a projection of the fifth structure part on the driving substrate does not overlap with a projection of the first electrode block on the driving substrate; In the first direction, a vertical distance between a side surface of the fifth structure part away from the driving substrate and a lower surface of the first electrode block is an eleventh distance, a vertical distance between a side surface of the sixth structure part away from the driving substrate and the lower surface of the first electrode block is a twelfth distance, and a distance between the fourth protrusion part away from the driving substrate and the first electrode block is a thirteenth distance; The eleventh distance is greater than the twelfth distance, and the thirteenth distance is greater than the eleventh distance.

22. The display panel of any one of claims 1 to 9, wherein the protrusion part comprises an arc-shaped protrusion; and / or a topography of the second electrode layer matches a surface shape of the light-emitting layer away from the driving substrate; and / or the driving substrate is provided with a seventh groove on a side close to the first electrode layer, the seventh groove being located in a region between two adjacent first electrode blocks; a distance between two adjacent first electrode blocks is greater than or equal to 0.4 μm and less than 1 μm; and / or in the case where the pixel boundary layer is provided with a first sub-groove, a distance between two adjacent first sub-grooves is greater than or equal to 0.2 μm; and / or the pixel boundary layer comprises an inorganic material layer.

23. A display device, comprising: the display panel of any one of claims 1 to 22.

Images