Display panel, display device and preparation method of display panel

Abstract

The invention relates to a display panel, a display device and a preparation method of the display panel. The display panel comprises a substrate, a partition structure and a plurality of light-emitting function parts, the partition structure and the light-emitting function parts are arranged on one side of the substrate, the partition structure is provided with a plurality of partition openings, and at least parts of the light-emitting function parts are arranged in the corresponding partition openings. The partition structure comprises a first partition wall located between two adjacent partition openings, the first partition wall comprises a first extending section, a second extending section and a third extending section which are sequentially connected, the second extending section comprises a first end and a second end which are located in the direction from one of the two adjacent partition openings to the other of the two adjacent partition openings, and the first extending section is connected with the first end; the third extension section is connected with the second end, and the end, away from the substrate, of the first extension section and the end, away from the substrate, of the third extension section are obliquely arranged in the direction away from the center of the first partition wall. Therefore, according to the display panel, the display device and the preparation method of the display panel, transverse electric leakage between the two adjacent light-emitting function parts is reduced.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel, a display device, and a method for manufacturing a display panel. Background Art

[0002] OLED (Organic Light Emitting Diode) display panel has many advantages such as full solid state, active luminescence, fast response speed, high contrast, no viewing angle limitation and flexible display. It is a new display technology developed in the mid-twentieth century and is widely used in people's daily production and life.

[0003] In the related art, a tandem OLED may include a substrate, a first light-emitting layer, a charge generation layer (CGL) and a second light-emitting layer stacked in sequence on the substrate, the first light-emitting layer includes a plurality of first sub-light-emitting portions, the second light-emitting layer includes a plurality of second sub-light-emitting portions, the first sub-light-emitting portions and the second sub-light-emitting portions are arranged correspondingly, and the charge generation layer connects the first sub-light-emitting portions and the corresponding second sub-light-emitting portions in series.

[0004] However, the lateral leakage of the charge generation layer of the stacked OLED is relatively serious. Summary of the invention

[0005] Based on this, it is necessary to provide a display panel, a display device and a method for manufacturing a display panel, aiming to reduce the lateral leakage between two adjacent light-emitting functional parts.

[0006] In a first aspect, an embodiment of the present application provides a display panel, comprising a substrate, a partition structure and a plurality of light-emitting functional parts, wherein the plurality of light-emitting functional parts are all arranged on one side of the substrate, the partition structure is provided with a plurality of partition openings, the plurality of light-emitting functional parts and the plurality of partition openings are arranged correspondingly, and at least a portion of the light-emitting functional parts is arranged in the corresponding partition openings. The partition structure comprises a first partition wall located between two adjacent partition openings, the first partition wall comprises a first extension section, a second extension section and a third extension section connected in sequence, the second extension section comprises a first end and a second end located in a direction from one of the two adjacent partition openings to the other, the first extension section is connected to the first end, the third extension section is connected to the second end, the end of the first extension section facing away from the substrate is tilted relative to the end close to the substrate in a direction away from the third extension section, and the end of the third extension section facing away from the substrate is tilted relative to the end close to the substrate in a direction away from the first extension section.

[0007] The display panel provided in the embodiment of the present application is provided with a partition structure, and the partition structure is used to separate two adjacent light-emitting functional parts, thereby preventing lateral leakage between the two adjacent light-emitting functional parts.

[0008] In a second aspect, an embodiment of the present application provides a display device, including the display panel of the first aspect.

[0009] In a third aspect, an embodiment of the present application provides a method for manufacturing a display panel, including:

[0010] Providing a substrate;

[0011] Forming a partition structure on one side of the substrate; the partition structure is provided with a plurality of partition openings;

[0012] Forming a plurality of light-emitting functional parts on one side of the substrate; the plurality of light-emitting functional parts and the plurality of partition openings are correspondingly arranged, and at least a part of the light-emitting functional parts is arranged in the corresponding partition openings; the partition structure includes a first partition wall between two adjacent partition openings, and the first partition wall includes a first extension section, a second extension section and a third extension section connected in sequence. The second extension section includes a first end and a second end in the direction from one of the two adjacent partition openings to the other. The first extension section is connected to the first end, the third extension section is connected to the second end, one end of the first extension section away from the substrate is inclined in a direction away from the third extension section relative to the end close to the substrate, and one end of the third extension section away from the substrate is inclined in a direction away from the first extension section relative to the end close to the substrate.

[0013] In the method for manufacturing a display panel provided by the embodiment of the present application, by preparing a partition structure for partitioning two adjacent light-emitting functional parts, lateral leakage between two adjacent light-emitting functional parts can be prevented. Description of the Drawings

[0014] Figure 1 It is a cross-sectional view of the display panel provided by the embodiment of the present application.

[0015] Figure 2 is Figure 1 a partial enlarged structural schematic diagram of

[0016] Figure 3 It is a top view of the partition structure and the second electrode provided by the embodiment of the present application.

[0017] Figure 4 is a partial enlarged structural schematic diagram of 3.

[0018] Figure 5 It is a structural schematic diagram after forming a conductive material layer provided by the embodiment of the present application.

[0019] Figure 6 It is a structural schematic diagram after forming the second electrode and the auxiliary electrode provided by the embodiment of the present application.

[0020] Figure 7Schematic diagram of the structure after forming the first opening provided by the embodiment of the present application.

[0021] Figure 8 Schematic diagram of the structure after forming the partition material layer provided by the embodiment of the present application.

[0022] Figure 9 Schematic diagram of the structure after forming the partition structure provided by the embodiment of the present application.

[0023] Figure 10 Schematic diagram of the structure after forming the mask layer provided by the embodiment of the present application.

[0024] Figure 11 Schematic diagram of the structure after removing all pixel defining material layers provided by the embodiment of the present application.

[0025] Figure 12 Schematic diagram of the structure for forming the photoresist material layer provided by the embodiment of the present application.

[0026] Figure 13 Schematic diagram of the structure after forming the pixel opening and the second gap provided by the embodiment of the present application.

[0027] Figure 14 Schematic diagram of the structure after forming the first electrode provided by the embodiment of the present application.

[0028] Figure 15 Flow chart of the method for manufacturing a display panel provided by the embodiment of the present application.

[0029] Explanation of reference numerals:

[0030] 100. Display panel; 111. Substrate; 112. Insulating layer; 113. Semiconductor layer; 114. Conductive layer; 120. Partition structure; 120a. Partition material layer; 121. First partition wall; 1211. First extension section; 1212. Second extension section; 1213. Third extension section; 122. Second partition wall; 123. Partition opening; 1231. First side wall; 1241. First sub-side wall; 1242. Second sub-side wall; 125. Groove; 1261. First surface; 131. First gap; 132. Second gap; 133. Accommodation space; 140. Auxiliary electrode; 142. Second surface; 150. Light-emitting unit; 151. First electrode; 1511. First sub-electrode; 1511d. Fourth extension section; 1511e. Fifth extension section; 1512. Second sub-electrode; 1513. Third sub-electrode; 152. Second electrode; 153. Light-emitting functional part; 160. Filler; 170. Pixel defining part; 171. Pixel opening; 172. Pixel defining material layer; 1721. First opening; 172a. Pixel defining material part; 174. Fourth sub-part; 175. Fifth sub-part; 176. Sixth sub-part; 180. Photoresist material layer; 180a. Photoresist material part; 181. First sub-part; 182. Second sub-part; 183. Third sub-part; 191. Mask layer; 192. Conductive material layer; M1. First conductive layer; M2. Second conductive layer; M3. Third conductive layer. Detailed implementation manners

[0031] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant accompanying drawings. The preferred embodiments of the present application are shown in the accompanying drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used herein in the description of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0033] When describing the positional relationship, unless otherwise specified, when an element such as a layer, film or substrate is referred to as being "on" another element, it can be directly on the other element or there can also be an intermediate element. Further, when a layer is referred to as being "under" another layer, it can be directly below or there can be one or more intermediate elements. It can also be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers or there can also be one or more intermediate elements.

[0034] In the case of using "comprising", "having", and "including" described in this article, unless explicit limiting terms are used, such as "only", "consisting of", etc., another component may also be added. Unless otherwise mentioned, terms in the singular form may include the plural form and should not be understood as having a quantity of one.

[0035] It should be understood that although terms such as "first" and "second" may be used in this article to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, the first element may be referred to as the second element, and similarly, the second element may be referred to as the first element.

[0036] It should also be understood that when interpreting an element, although not explicitly described, the element is interpreted as including an error range, which should be within the acceptable deviation range of a specific value determined by those skilled in the art. For example, "about", "approximately", or "substantially" may mean within one or more standard deviations, which are not defined herein.

[0037] In addition, in the specification, the phrase "schematic diagram of planar distribution" refers to the drawing when observing the target part from above, and the phrase "schematic cross-sectional view" refers to the drawing when observing the cross-section intercepted by vertically cutting the target part from the side.

[0038] In addition, the drawings are not drawn to a scale of 1:1, and the relative sizes of the various elements are only drawn by way of example in the drawings and are not necessarily drawn to the actual scale.

[0039] As described in the background art section, in the related art, a stacked OLED (Tandem OLED) may include a substrate, a first light-emitting layer, a charge generation layer (Charge Generation Layer, abbreviated as CGL), and a second light-emitting layer that are sequentially stacked on the substrate. The first light-emitting layer includes a plurality of first sub-light-emitting parts, the second light-emitting layer includes a plurality of second sub-light-emitting parts, the first sub-light-emitting parts and the second sub-light-emitting parts are correspondingly arranged, and the charge generation layer connects the first sub-light-emitting part and the corresponding second sub-light-emitting part in series. The first sub-light-emitting part and the corresponding second sub-light-emitting part together form a sub-light-emitting unit group.

[0040] However, the charge generation layer is a whole-surface structure, and the charge generation layers of each sub-light-emitting unit group are connected, resulting in relatively serious lateral leakage between the charge generation layers of two adjacent sub-light-emitting unit groups.

[0041] Based on the above technical problems, the inventors have found through research that by providing a partition structure for partitioning two adjacent light-emitting functional parts, lateral leakage between the two adjacent light-emitting functional parts can be prevented.

[0042] The above is the core idea of this application. Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0043] The following will be described in conjunction with the attached Figures 1 - 15 A display panel, a display device, and a method for manufacturing a display panel provided in an embodiment of this application will be described.

[0044] Referring to Figure 1 , an embodiment of this application provides a display panel 100, and the display panel 100 may include a substrate 111. The substrate 111 can provide support for the remaining film layers to be provided subsequently. Among them, the thickness direction of the substrate 111 is the Z direction.

[0045] Referring to Figure 1 , the display panel 100 includes a partition structure 120 and a plurality of light-emitting functional parts 153. The partition structure 120 and the light-emitting functional parts 153 are both provided on one side in the thickness direction of the substrate 111, and the partition structure 120 is provided with a plurality of partition openings 123. For example, the partition structure 120 can be grid-shaped ( Figure 4 ). The plurality of light-emitting functional parts 153 and the plurality of partition openings 123 are correspondingly arranged, and at least a part of the light-emitting functional part 153 is arranged in the corresponding partition opening 123.

[0046] Wherein, in the embodiment of this application, the corresponding arrangement of a and b may mean: one a is correspondingly arranged with at least one b, or one b is correspondingly arranged with at least one a. The embodiment of this application is described by taking the corresponding arrangement of one a and one b as an example. For example, the corresponding arrangement of the partition opening 123 and the light-emitting functional part 153 may mean that one partition opening 123 is correspondingly arranged with at least one light-emitting functional part 153, or one light-emitting functional part 153 is correspondingly arranged with at least one partition opening 123.

[0047] The following will describe the partition structure 120 provided in the embodiment of this application.

[0048] Referring to Figure 1 and Figure 3The partition structure 120 includes a first partition wall 121 located between two adjacent partition openings 123, the first partition wall 121 includes a first extension section 1211, a second extension section 1212 and a third extension section 1213, the first extension section 1211 is located on a side of the second extension section 1212 close to one partition opening 123, the third extension section 1213 is located on a side of the second extension section 1212 close to the other partition opening 123, and the first extension section 1211 and the second extension section 1212 are arranged in a direction from one to the other of the two adjacent partition openings 123. One end of the first extension section 1211 close to the substrate 111 is connected to one end of the second extension section 1212, and one end of the first extension section 1211 facing away from the substrate 111 is tilted relative to the end close to the substrate 111 in a direction away from the third extension section 1213, one end of the third extension section 1213 close to the substrate 111 is connected to the other end of the second extension section 1212, and one end of the third extension section 1213 facing away from the substrate 111 is tilted relative to the end close to the substrate 111 in a direction away from the first extension section 1211. In this way, the partition structure 120 forms an undercut structure with a "large upper part and small lower part". In the process of forming the light-emitting functional part 153, the partition structure 120 can isolate the light-emitting functional parts 153 in two adjacent partition openings 123, thereby preventing the light-emitting functional parts 153 from being stolen due to lateral leakage between the two adjacent light-emitting functional parts 153.

[0049] In some embodiments, see Figure 1 and Figure 3 The partition structure 120 includes a second partition wall 122 located between two adjacent first partition walls 121, the first partition walls 121 enclose a groove 125, the first extension section 1211, the second extension section 1212 and the first extension section 1211 together enclose a groove 125, the second extension section 1212 is located at the groove bottom of the groove 125, the first extension section 1211 and the third extension section 1213 are located at the groove side of the groove 125, and the grooves 125 of two adjacent first partition walls 121 are connected through the second partition wall 122. The second partition wall 122 is arranged close to the groove bottom of the groove 125, and the extension direction of the second partition wall 122 and the extension direction of the second extension section 1212 can be the same, so that the shape of the second partition wall 122 is relatively simple.

[0050] In some embodiments, see Figure 2The side wall of the partition structure 120 close to the partition opening 123 may be a first side wall 1231, and the first side wall 1231 is also the side wall of the partition opening 123. The first side wall 1231 may include a first sub-side wall 1241 and a second sub-side wall 1242 connected to each other. The first sub-side wall 1241 is disposed between the second sub-side wall 1242 and the substrate 111, and the first sub-side wall 1241 is disposed closer to the substrate 111 than the second sub-side wall 1242. In the corresponding light-emitting functional part 153 and the partition opening 123, the light-emitting functional part 153 contacts the first sub-side wall 1241, so that a hole between the light-emitting functional part 153 and the first sub-side wall 1241 can be prevented, and the hole can be prevented from interfering with the propagation and reflection of light and affecting the display effect of the display panel 100. A first gap 131 is provided between the light-emitting functional part 153 and the second sub-side wall 1242 . By providing the first gap 131 , the light-emitting functional part 153 is spaced apart from the surface of the partition structure 120 facing away from the substrate 111 , and two adjacent light-emitting functional parts 153 are separated by the first gap 131 .

[0051] In some embodiments, the display panel 100 includes a filling piece 160, which is disposed on a side of the partition structure 120 facing away from the substrate 111, and the filling piece 160 is at least partially located in the groove 125. Since there is a first gap 131 between the light-emitting functional part 153 and the second sub-side wall 1242, there is a distance between the filling piece 160 and the light-emitting functional part 153, and there is no direct contact between the filling piece 160 and the light-emitting functional part 153. For example, when forming the light-emitting functional part 153, a light-emitting functional material layer can be formed. Since the partition structure 120 is a bottom cut structure, the light-emitting functional material layer located in the partition opening 123 and the light-emitting functional material layer located on the side of the partition structure 120 away from the substrate 111 can be separated. The light-emitting functional material layer located in the partition opening 123 forms the light-emitting functional part 153, and the light-emitting functional material layer located on the side of the partition structure 120 away from the substrate 111 forms the filling member 160, so that two adjacent light-emitting functional parts 153 can be separated. At this time, the filling member 160 and the light-emitting functional part 153 are set in the same layer and the same material to synchronously prepare the light-emitting functional part 153 and the filling member 160, so that the preparation process of the filling member 160 and the light-emitting functional part 153 can be simplified and the preparation cost can be reduced.

[0052] Exemplarily, the material of the partition structure 120 is a conductive material, and the partition structure 120 is a conductive member. The material of the partition structure 120 may include metals such as titanium, silver, copper, aluminum, and molybdenum, or alloys, or conductive oxides, such as Indium Tin Oxide (ITO for short), Indium Zinc Oxide (IZO for short), Zinc Oxide (ZnO), Aluminum Zinc Oxid (AZO for short), Gallium Zinc Oxide, Tantalum Titanium Oxide, Tin Oxide, Cadmium Oxide, Indium Oxide, or any one or more of them. In some other examples, the material of the partition structure 120 may be an insulating material. In the embodiments of the present application, the case where the material of the partition structure 120 is a conductive material is taken as an example for illustration.

[0053] The following describes the first electrode 151 provided in the embodiments of the present application.

[0054] In some embodiments, referring to Figure 2 , the display panel 100 includes a first electrode 151. The first electrode 151 includes a first sub-electrode 1511 and a plurality of second sub-electrodes 1512. The first sub-electrode 1511 is connected to each second sub-electrode 1512. The first sub-electrode 1511 is disposed on the side of the partition structure 120 away from the substrate 111. Some of the first sub-electrodes 1511 may be disposed on the side of the filling member 160 away from the substrate 111, and some of the first sub-electrodes 1511 may be disposed on the sidewall of the filling member 160. The plurality of second sub-electrodes 1512 are correspondingly disposed with the plurality of light-emitting functional parts 153. The second sub-electrode 1512 is disposed on the side of the corresponding light-emitting functional part 153 away from the substrate 111. In this way, by connecting the first sub-electrode 1511 to each second sub-electrode 1512, the first electrode 151 is a full-surface electrode, which is convenient for supplying power to the first electrode 151.

[0055] In some embodiments, referring to Figure 2 , the first electrode 151 includes a plurality of third sub-electrodes 1513. The third sub-electrodes 1513 are disposed on the side of the first sub-electrode 1511 facing the substrate 111, and the third sub-electrodes 1513 are connected to the first sub-electrode 1511. By providing the third sub-electrodes 1513, it is beneficial to reduce the resistance of the first electrode 151, thereby reducing the voltage drop of the first electrode 151, improving the potential uniformity of the first electrode 151, and being beneficial to improving the display effect of the display panel 100. The third sub-electrodes 1513 and the first gaps 131 may be correspondingly disposed. The third sub-electrodes 1513 are disposed in the corresponding first gaps 131, and the third sub-electrodes 1513 are in contact with the corresponding second sub-sidewalls 1242. In this way, it is beneficial to prevent the formation of holes between the third sub-electrodes 1513 and the second sub-sidewalls 1242, and it can prevent the holes from interfering with the propagation and reflection of light and affecting the display effect of the display panel 100.

[0056] In an embodiment where the partition structure 120 is a conductive member, the third sub-electrode 1513 contacts the corresponding second sub-sidewall 1242, so that the third sub-electrode 1513 can electrically connect the first electrode 151 and the partition structure 120 together, and a power supply voltage can be provided to the first electrode 151 through the partition structure 120, thereby optimizing the wiring layout of the display panel 100.

[0057] In some embodiments, referring to Figure 2 , the first sub-electrode 1511 includes a fourth extension segment 1511d and a fifth extension segment 1511e with different extension directions. The fifth extension segment 1511e and the second sub-electrode 1512 are connected by the fourth extension segment 1511d, and the fourth extension segment 1511d is located between the fifth extension segment 1511e and the second sub-electrode 1512. One end of the third sub-electrode 1513 facing away from the substrate 111 is connected to one end of the fourth extension segment 1511d facing the substrate 111. The fourth extension segment 1511d, the fifth extension segment 1511e, and the third sub-electrode 1513 together enclose an inverted U-shaped cover structure. The cover structure covers one end of the partition structure 120 facing away from the substrate 111, and since the first extension segment 1211 and the third extension segment 1213 are inclined, the cover structure and the partition structure 120 are mutually limited in the thickness direction of the substrate 111 and are not easily separated, which can improve the connection stability between the first electrode 151 and the partition structure 120.

[0058] In some embodiments, referring to Figure 2 , the fourth extension segment 1511d, the fifth extension segment 1511e, and the partition structure 120 together enclose an accommodation space 133. The filling member 160 is disposed in the accommodation space 133, and the filling member 160 is enclosed in the accommodation space 133, so that the filling member 160 is completely separated from the light-emitting functional part 153, which is beneficial to preventing lateral leakage due to contact between the light-emitting functional part 153 and the filling member 160. Among them, the fourth extension segment 1511d covers the sidewall of the filling member 160, and the fifth extension segment 1511e is located on the side of the filling member 160 facing away from the substrate 111.

[0059] In some embodiments, referring to Figure 2 , the thickness of the second sub-electrode 1512 is H, the dimension of the sidewall of the partition structure 120 close to the partition opening 123 (i.e., the first sidewall 1231) in the thickness direction of the substrate 111 is C, and the thickness of the light-emitting functional part 153 is G. H, G, and C satisfy the following formula: C≤G + H. In this way, it is possible to prevent the dimension of the first sidewall 1231 in the thickness direction of the substrate 111 from being too large, prevent the step difference between the first extension segment 1211 and the third extension segment 1213 relative to the first surface 1261 from being too large, and is beneficial to preventing the first electrode 151 from breaking due to an excessive step difference.

[0060] In some embodiments, the display panel 100 includes a plurality of pixel defining portions 170, and two adjacent pixel defining portions 170 are spaced apart. The plurality of pixel defining portions 170 and the plurality of partition openings 123 are correspondingly arranged. At least a part of the pixel defining portion 170 is disposed in the corresponding partition opening 123, and a second gap 132 is provided between the pixel defining portion 170 and the side wall (i.e., the first side wall 1231) of the partition structure 120 close to the partition opening 123. At least a part of the second gap 132 may be located between the first sub-side wall 1241 and the side wall of the pixel defining portion 170.

[0061] Among them, referring to Figure 1 and Figure 2 , the pixel defining portion 170 is provided with a pixel opening 171. The light-emitting functional portion 153 is located in the corresponding pixel opening 171, on the side of the corresponding pixel defining portion 170 away from the substrate 111, and in the corresponding second gap 132. By extending the light-emitting functional portion 153 into the second gap 132, it is beneficial to reduce the depth of the first gap 131 in the direction from the end close to the substrate 111 to the end far from the substrate 111 along the first side wall 1231, so that the third sub-electrode 1513 can more easily fill the first gap 131 (when the depth of the first gap 131 is too deep, the third sub-electrode 1513 is not easy to reach the bottom of the first gap 131). It is beneficial to prevent a hole from being formed between the end of the third sub-electrode 1513 facing the substrate 111 and the light-emitting functional portion 153, and can prevent the hole from interfering with the propagation and reflection of light and affecting the display effect of the display panel 100.

[0062] In some embodiments, referring to Figure 2 , the dimension of the first side wall 1231 in the direction from the end close to the substrate 111 to the end far from the substrate 111 is A, the dimension of the first side wall 1231 in the thickness direction of the substrate 111 is C, and the distance (such as the maximum distance) between the pixel defining portion 170 and the corresponding first side wall 1231 is E. A, C, and E satisfy the following formula: E 2 ≥A 2 -C 2 . Among them, A 2 -C 2 is equal to the square of the dimension of the positive projection of the first side wall 1231 on the substrate 111 in the direction from the first extension section 1211 to the third extension section 1213, that is, A 2 -C 2 =D 2 . This can prevent the dimension of the second gap 132 in the direction from the first extension section 1211 to the third extension section 1213 from being too small, resulting in the first gap 131 between the light-emitting functional portion 153 and the second sub-side wall 1242 being filled by the light-emitting functional portion 153, which is beneficial to exposing the second sub-side wall 1242 outside the light-emitting functional portion 153 to contact the third sub-electrode 1513.

[0063] Among them, the smaller the distance E is, the closer the light-emitting functional part 153 is to the second sub-sidewall 1242, the smaller the dimension of the first gap 131 along the direction from the first extension section 1211 to the third extension section 1213 is, and the greater the difficulty for the third sub-electrode 1513 to enter the first gap 131 is.

[0064] In some embodiments, referring to Figure 2 , the thickness of the light-emitting functional part 153 is G, and the dimension of the sidewall of the partition structure 120 close to the partition opening 123 along the thickness direction of the substrate 111 is C. Among them, C and G satisfy the following formula: G≤C. In this way, it is beneficial that the light-emitting functional part 153 cannot contact all the first sidewalls 1231, that is, it is beneficial for the light-emitting functional part 153 to contact the first sub-sidewall 1241 without contacting the second sub-sidewall 1242, and it is beneficial to expose the second sub-sidewall 1242 outside the light-emitting functional part 153 to contact the third sub-electrode 1513, that is, it is beneficial to form the first gap 131.

[0065] In some embodiments, referring to Figure 2 , the display panel 100 includes an auxiliary electrode 140. The auxiliary electrode 140 is disposed between the partition structure 120 and the substrate 111, and the auxiliary electrode 140 is connected to the partition structure 120. The partition structure 120 is a conductive member. By providing the auxiliary electrode 140, it is beneficial to reduce the resistance of the first electrode 151, thereby reducing the voltage drop of the first electrode 151, improving the potential uniformity of the first electrode 151, and being beneficial to improving the display effect of the display panel 100. The shape of the orthographic projection of the auxiliary electrode 140 on the substrate 111 is substantially the same as the shape of the orthographic projection of the partition structure 120 on the substrate 111, and the auxiliary electrode 140 can be in a grid shape.

[0066] In some embodiments, referring to Figure 1 , the display panel 100 includes a plurality of second electrodes 152. The plurality of second electrodes 152 are correspondingly arranged with the plurality of light-emitting functional parts 153. The second electrodes 152 are disposed between the corresponding light-emitting functional parts 153 and the substrate 111. The second electrodes 152, the light-emitting functional parts 153, and the first electrode 151 are stacked in the direction away from the substrate to jointly form a light-emitting unit 150. There can be a plurality of light-emitting units 150, and the plurality of light-emitting units 150 are arranged in a direction parallel to the substrate 111. Since the first electrode 151 is a full-surface electrode, the first electrodes 151 of two adjacent light-emitting units 150 are connected. There is a spacing between the second electrodes 152 of two adjacent light-emitting units 150, and there is a spacing between the light-emitting functional parts 153 of two adjacent light-emitting units 150.

[0067] Exemplarily, the pixel opening 171 exposes the corresponding second electrode 152, and the pixel defining part 170 covers the edge of the second electrode 152, which is beneficial to protecting the second electrode 152.

[0068] Exemplarily, the pixel defining portion 170 covers the edge of the auxiliary electrode 140, thereby protecting the auxiliary electrode 140.

[0069] Exemplarily, the plurality of light emitting units 150 include, but are not limited to, red light emitting units, green light emitting units, and blue light emitting units. In other examples, the plurality of light emitting units 150 may further include white light emitting units.

[0070] In some embodiments, the second electrode 152 and the auxiliary electrode 140 are disposed on the same layer and made of the same material. In this way, the second electrode 152 and the auxiliary electrode 140 can be prepared synchronously, thereby simplifying the manufacturing process of the second electrode 152 and the auxiliary electrode 140 and reducing the manufacturing cost.

[0071] It should be noted that "on the same layer and made of the same material" in the embodiments of the present application means that a base film layer is formed of the same material. After patterning and / or other processing techniques are performed on the base film layer, different parts of the base film layer are respectively formed into multiple structural film layers. The processing techniques for the formed different structural film layers may be the same or different, and the formed different structural film layers may have the same or different thicknesses, and may be on the same horizontal plane or different horizontal planes.

[0072] In some embodiments, referring to Figure 2 , the surface of the partition structure 120 facing the substrate 111 is the first surface 1261, and the surface of the auxiliary electrode 140 facing the substrate 111 is the second surface 142. The orthographic projection of the first surface 1261 on the substrate 111 is located within the orthographic projection of the second surface 142 on the substrate 111, and / or the orthographic projection of the first surface 1261 on the substrate 111 is located within the orthographic projection of the surface of the auxiliary electrode 140 facing away from the substrate 111 on the substrate 111. In this way, the auxiliary electrode 140 has a good supporting effect on the partition structure 120, which is beneficial to increasing the contact area between the partition structure 120 and the auxiliary electrode 140 and reducing the contact resistance between the partition structure 120 and the auxiliary electrode 140.

[0073] Exemplarily, one of the first electrode 151 layer and the second electrode 152 layer may be an anode, and the other of the first electrode 151 layer and the second electrode 152 layer may be a cathode. In the embodiments of the present application, it is described by taking the first electrode 151 layer as the cathode and the second electrode 152 as the anode as an example.

[0074] Exemplarily, the first electrode 151 may be electrically connected to the first power supply line. The second electrode 152 may be electrically connected to the pixel circuit, and the pixel circuit may be electrically connected to the second power supply line. One of the first power supply line and the second power supply line is used to transmit a high voltage, and the other is used to transmit a low voltage. In the embodiments of the present application, it is described by taking the first power supply line for transmitting a low voltage and the second power supply line for transmitting a high voltage as an example.

[0075] Exemplarily, the light-emitting functional part 153 may include a light-emitting material, and the light-emitting functional part 153 may also include one or more of a charge generation layer, a hole injection layer (Hole Injection Layer, HIL), a hole transport layer (Hole Transport Layer, HTL), an electron injection layer (Electron Injection Layer, EIL), an electron transport layer (Electron Transport Layer, ETL), a hole blocking layer (Hole Block Layer, HBL), and an electron blocking layer (Electron Block Layer, EBL).

[0076] The display device provided by the embodiments of the present application will be described below.

[0077] A display device provided by an embodiment of the present application includes the display panel 100 in any of the above embodiments. Therefore, the display device also has the beneficial effects of the display panel 100 in the above embodiments. For the same parts, reference may be made to the explanation of the display panel 100 above, and details will not be repeated here.

[0078] Exemplarily, the display device may be a mobile phone or any electronic product with a display function, including but not limited to the following categories: televisions, laptop computers, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, in-vehicle displays, industrial control devices, medical display screens, touch interaction terminals, etc. The embodiments of the present application do not make special limitations on this.

[0079] In some embodiments, the display panel 100 may include an organic light-emitting diode display panel 100 (Organic Light Emitting Diode, abbreviated as OLED), a quantum dot light-emitting diode display panel (Quantum Dot Light Emitting Diodes, abbreviated as QLED), a micro organic light-emitting diode (Micro Organic Light-Emitting Diode, abbreviated as Micro OLED) display panel, etc. The embodiments of the present application will be described by taking the display panel 100 as an OLED display panel as an example.

[0080] The array layer provided by the embodiments of the present application will be described below.

[0081] See Figure 1, the display panel 100 may include an array layer disposed between the substrate 111 and the second electrode 152. The array layer may include a semiconductor layer 113 and a multi-layer conductive layer 114. The multi-layer conductive layer may include a first conductive layer M1, a second conductive layer M2, and a third conductive layer M3. The semiconductor layer 113, the first conductive layer M1, the second conductive layer M2, and the third conductive layer M3 are stacked in a direction away from the substrate 111. An insulating layer 112 is provided between adjacent two layers of the semiconductor layer 113, the first conductive layer M1, the second conductive layer M2, and the third conductive layer M3. An insulating layer 112 is provided between the third conductive layer M3 and the second electrode 152.

[0082] Exemplarily, the array layer includes a pixel circuit, and the pixel circuit is electrically connected to the light-emitting unit 150. The pixel circuit includes a transistor and a capacitor. The semiconductor layer 113 includes the active layer of the transistor. The first conductive layer M1 may include at least one of a plate of the capacitor and the gate of the transistor. The second conductive layer M2 may include the source and drain of the transistor. One of the source and drain of the transistor is connected to the second electrode 152 through the third conductive layer M3.

[0083] The following describes the manufacturing method of the display panel 100 provided in the embodiments of the present application.

[0084] The embodiments of the present application provide a manufacturing method of a display panel 100, and the manufacturing method is used to manufacture the display panel 100 in the above embodiments. Refer to Figure 15 , the manufacturing method may include:

[0085] S100: Provide a substrate.

[0086] Refer to Figure 5 , provide the substrate 111, and the substrate 111 can provide support for the remaining film layers to be provided subsequently.

[0087] S200: Form a partition structure on one side of the substrate; the partition structure is provided with a plurality of partition openings.

[0088] Refer to Figure 9 , after providing the substrate 111, it may include forming a partition structure 120 on one side of the substrate 111, and the partition structure 120 is provided with a plurality of partition openings 123.

[0089] S300: A plurality of light-emitting functional parts are formed on one side of the substrate; the plurality of light-emitting functional parts and the plurality of partition openings are arranged correspondingly, and at least part of the light-emitting functional parts is arranged in the corresponding partition openings; wherein the partition structure comprises a first partition wall located between two adjacent partition openings, the first partition wall comprises a first extension section, a second extension section and a third extension section, the first extension section is located on a side of the second extension section close to one partition opening, and the third extension section is located on a side of the second extension section close to another partition opening; an end of the first extension section close to the substrate is connected to the second extension section, an end of the first extension section facing away from the substrate is inclined relative to an end close to the substrate in a direction away from the third extension section, an end of the third extension section close to the substrate is connected to the second extension section, and an end of the third extension section facing away from the substrate is inclined relative to an end close to the substrate in a direction away from the first extension section.

[0090] See also Figure 14 After forming the partition structure 120 on one side of the substrate 111, the method may include forming a plurality of light-emitting functional parts 153 on one side of the substrate 111. The plurality of light-emitting functional parts 153 and the plurality of partition openings 123 are arranged correspondingly, at least a portion of the light-emitting functional parts 153 is arranged in the corresponding partition openings 123, the partition structure 120 includes a first partition wall 121 located between two adjacent partition openings 123, the first partition wall 121 includes a first extension section 1211, a second extension section 1212 and a third extension section 1213, the first extension section 1211 is located on a side of the second extension section 1212 close to a partition opening 123, the third extension section 1213 is located on a side of the second extension section 1212 close to a partition opening 123 One side of the other partition opening 123; the end of the first extension section 1211 close to the substrate 111 is connected to the second extension section 1212, the end of the first extension section 1211 facing away from the substrate 111 is tilted relative to the end close to the substrate 111 in a direction away from the third extension section 1213, the end of the third extension section 1213 close to the substrate 111 is connected to the second extension section 1212, and the end of the third extension section 1213 facing away from the substrate 111 is tilted relative to the end close to the substrate 111 in a direction away from the first extension section 1211. In this way, the partition structure 120 forms an undercut structure of "large on top and small on bottom", and in the process of forming the light-emitting functional part 153, the partition structure 120 can isolate the light-emitting functional parts 153 in two adjacent partition openings 123, thereby preventing the lateral leakage between the two adjacent light-emitting functional parts 153 from causing stealth.

[0091] In some embodiments, see Figure 7 After providing the substrate 111 and before forming the partition structure 120 on one side of the substrate 111, the method may include forming a pixel defining material layer 172 on one side of the substrate 111, and then forming a first opening 1721 on the pixel defining material layer 172. Figure 8 andFigure 9 , a partition structure 120 is formed on one side of the substrate 111. It may include forming a partition material layer 120a on the side of the pixel defining material layer 172 facing away from the substrate 111 and in the first opening 1721. Then, the partition material layer 120a located outside the first opening 1721 is removed, and the partition material layer 120a located inside the first opening 1721 is retained to form the partition structure 120. Among them, the partition material layer 120a on the sidewall of the first opening 1721 forms a first extension section 1211 and a third extension section 1213, and the partition material layer 120a at the bottom of the first opening 1721 forms a second extension section 1212. By adjusting the inclination angle of the sidewall of the first opening 1721, the inclination angles of the first extension section 1211 and the third extension section 1213 can be adjusted, and the adjustment method of this inclination angle is simple and feasible.

[0092] In some embodiments, referring to Figure 11 、 Figure 12 and Figure 13 , after forming the partition structure 120 on one side of the substrate 111, before forming a plurality of light-emitting functional parts 153 on one side of the substrate 111, it may include removing the pixel defining material layer 172. Then, a photoresist material layer 180 is formed on one side of the substrate 111. The photoresist material layer 180 includes a plurality of photoresist material parts 180a. The photoresist material parts 180a are correspondingly arranged with a plurality of partition openings 123. The photoresist material parts 180a are disposed in the corresponding partition openings 123. The photoresist material parts 180a include a first sub-part 181, a second sub-part 182, and a third sub-part 183. The second sub-part 182 is disposed on the outer periphery of the first sub-part 181, and the third sub-part 183 is disposed on the outer periphery of the second sub-part 182. The first sub-part 181, the second sub-part 182, and the third sub-part 183 are arranged in sequence from the center to the edge of the photoresist material part 180a. After that, a part of the photoresist material layer 180 is exposed. Then, the first sub-part 181 is removed by development to form a pixel opening 171, the third sub-part 183 is removed by development to form a second gap 132, and the second sub-part 182 is retained to form a pixel defining part 170.

[0093] Exemplarily, the photoresist material layer 180 may be a positive photoresist. After the positive photoresist is exposed, the exposed part will dissolve in the developer, and the unexposed part will be retained. Exposing a part of the photoresist material layer 180 may include exposing the first sub-part 181 and the third sub-part 183.

[0094] Exemplarily, the photoresist material layer 180 may be a negative photoresist. After the negative photoresist is exposed, the exposed part will undergo a cross-linking reaction and will not dissolve in the developer, and the unexposed part will be dissolved. Exposing a part of the photoresist material layer 180 may include exposing the second sub-part 182.

[0095] Exemplarily, the photoresist material layer 180 can be formed by means such as coating and spraying.

[0096] In some other embodiments, referring to Figure 10 and Figure 13 , the pixel defining material layer 172 includes a plurality of pixel defining material portions 172a. The pixel defining material portions 172a are correspondingly arranged with a plurality of partition openings 123. The pixel defining material portions 172a are disposed in the corresponding partition openings 123. The pixel defining material portions 172a include a fourth sub-portion 174, a fifth sub-portion 175, and a sixth sub-portion 176. The fifth sub-portion 175 is disposed on the outer periphery of the fourth sub-portion 174, and the sixth sub-portion 176 is disposed on the outer periphery of the fifth sub-portion 175. The fourth sub-portion 174, the fifth sub-portion 175, and the sixth sub-portion 176 are arranged in sequence from the center to the edge of the pixel defining material portion 172a. After forming the partition structure 120 on one side of the substrate 111, before forming a plurality of light-emitting functional portions 153 on one side of the substrate 111, it may include forming a mask layer 191 on the side of the fifth sub-portion 175 facing away from the substrate 111. The fifth sub-portion 175 is covered by the mask layer 191, and the fourth sub-portion 174 and the sixth sub-portion 176 are not covered by the mask layer 191. The fourth sub-portion 174 and the sixth sub-portion 176 are both exposed outside the mask layer 191. Remove the fourth sub-portion 174 and the sixth sub-portion 176 that are not covered by the mask layer 191. Remove the fourth sub-portion 174 to form a pixel opening 171, and remove the sixth sub-portion 176 to form a second gap 132. Retain the fifth sub-portion 175 covered by the mask to form a pixel defining portion 170. Then, remove the mask layer 191 to expose the pixel defining portion 170.

[0097] In some embodiments, referring to Figure 5 and Figure 6 , after providing the substrate 111, before forming the pixel defining material layer 172 on one side of the substrate 111, it may include forming a conductive material layer 192 on one side of the substrate 111. Then, pattern the conductive material layer 192 to form a plurality of second electrodes 152 and an auxiliary electrode 140. The first opening 1721 exposes at least a part of the auxiliary electrode 140. In this way, the second electrodes 152 and the auxiliary electrode 140 can be formed synchronously, thereby simplifying the manufacturing process of the second electrodes 152 and the auxiliary electrode 140 and reducing the manufacturing cost.

[0098] In some embodiments, after forming a plurality of light-emitting functional portions 153 on one side of the substrate 111, it may include forming a first electrode 151 on the side of the light-emitting functional portions 153 and the partition structure 120 facing away from the substrate 111.

[0099] Exemplarily, the first electrode 151 is formed by evaporation coating. The evaporation angle γ of the first electrode 151 is smaller than the angle β between any one of the first extension section 1211 and the second extension section 1212 and the substrate 111. In this way, the first electrode 151 can be evaporated and coated onto the first sidewall 1231, so that the first electrode 151 can contact the second sub-sidewall 1242, facilitating the formation of a continuous first electrode 151 and electrically connecting the first electrode 151 and the partition structure 120 together.

[0100] It should be noted that during the evaporation coating process, an evaporation cloud of the evaporation material can be formed. S shows the edge of the evaporation cloud, and the angle defined by the edge S of the evaporation cloud and the direction parallel to the substrate 111 is the evaporation angle.

[0101] Exemplarily, the light-emitting functional part 153 is formed by evaporation coating. When the evaporation angle of the light-emitting functional part 153 is greater than the angle β between any one of the first extension section 1211 and the second extension section 1212 and the substrate 111, the light-emitting functional part 153 cannot contact the first sidewall 1231, easily resulting in the formation of holes between the light-emitting functional part 153 and the first sidewall 1231. When the evaporation angle of the light-emitting functional part 153 is smaller than the angle β between any one of the first extension section 1211 and the second extension section 1212 and the substrate 111, the light-emitting functional part 153 may completely cover the first sidewall 1231, causing the first electrode 151 to be unable to contact the second sub-sidewall 1242. Therefore, the evaporation angle of the light-emitting functional part 153 can be set to be equal to the angle β between any one of the first extension section 1211 and the second extension section 1212 and the substrate 111, thus preventing the above problems.

[0102] In some embodiments, after providing the substrate 111 and before forming the second electrode 152, forming an array layer may be included.

[0103] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0104] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application.

Claims

1. A display panel, characterized in that: include: substrate; A partition structure is provided on one side of the substrate, and the partition structure is provided with a plurality of partition openings; A plurality of light-emitting functional parts are arranged on one side of the substrate, the plurality of light-emitting functional parts and the plurality of partition openings are arranged correspondingly, and at least a part of the light-emitting functional parts is arranged in the corresponding partition openings; Wherein, the partition structure includes a first partition wall located between two adjacent partition openings, the first partition wall includes a first extension section, a second extension section and a third extension section, the first extension section is located on a side of the second extension section close to one of the partition openings, and the third extension section is located on a side of the second extension section close to another partition opening; an end of the first extension section close to the substrate is connected to the second extension section, an end of the first extension section facing away from the substrate is inclined relative to an end close to the substrate in a direction away from the third extension section, an end of the third extension section close to the substrate is connected to the second extension section, and an end of the third extension section facing away from the substrate is inclined relative to an end close to the substrate in a direction away from the first extension section.

2. The display panel according to claim 1, characterized in that: The side wall of the partition structure close to the partition opening includes a first sub-side wall and a second sub-side wall connected to each other, wherein the first sub-side wall is arranged between the second sub-side wall and the substrate; In the corresponding light emitting function part and the partition opening, the light emitting function part is in contact with the first sub-side wall, and a first gap is provided between the light emitting function part and the second sub-side wall.

3. The display panel according to claim 2, characterized in that: The display panel includes a filling member, which is arranged on a side of the partition structure away from the substrate, and a distance is provided between the filling member and the light-emitting functional part.

4. The display panel according to claim 3, characterized in that: The filling member and the light-emitting functional part are provided in the same layer and with the same material.

5. The display panel according to any one of claims 2 to 4, characterized in that: The display panel includes a first electrode, the first electrode includes a first sub-electrode and a plurality of second sub-electrodes, the first sub-electrode is connected to each second sub-electrode, the first sub-electrode is arranged on a side of the partition structure away from the substrate, the plurality of second sub-electrodes are arranged corresponding to the plurality of light-emitting functional portions, and the second sub-electrodes are arranged on a side of the corresponding light-emitting functional portion away from the substrate.

6. The display panel according to claim 5, characterized in that: The first electrode includes a plurality of third sub-electrodes, wherein the third sub-electrodes are arranged on a side of the first sub-electrode facing the substrate and are connected to the first sub-electrode, the third sub-electrodes and the first gaps are arranged correspondingly, the third sub-electrodes are arranged in the corresponding first gaps and are in contact with the corresponding second sub-side walls, and the partition structure is a conductive member.

7. The display panel according to claim 6, characterized in that: The first sub-electrode includes a fourth extension segment and a fifth extension segment with different extension directions, the fifth extension segment and the second sub-electrode are connected via the fourth extension segment, and the third sub-electrode is connected to one end of the fourth extension segment toward the substrate.

8. The display panel according to claim 7, characterized in that: The display panel includes a filling piece, the fourth extension section, the fifth extension section and the partition structure together enclose a containing space, the filling piece is arranged in the containing space, the fourth extension section covers the side wall of the filling piece, and the fifth extension section is located on a side of the filling piece away from the substrate.

9. The display panel according to claim 5, characterized in that: The thickness of the second sub-electrode is H, the dimension of the side wall of the partition structure close to the partition opening along the thickness direction of the substrate is C, the thickness of the light-emitting functional part is G, and H, G and C satisfy the following formula: C≤G+H.

10. The display panel according to any one of claims 1 to 4, characterized in that: The first partition walls enclose a groove, the partition structure includes a second partition wall located between two adjacent first partition walls, and the grooves of two adjacent first partition walls are connected through the second partition wall.

11. The display panel according to any one of claims 1 to 4, characterized in that: The display panel includes a plurality of pixel defining parts, the plurality of pixel defining parts and the plurality of partition openings are arranged correspondingly, at least part of the pixel defining parts is arranged in the corresponding partition openings, and a second gap is arranged between the pixel defining parts and the side wall of the partition structure close to the partition opening; The pixel defining portion is provided with a pixel opening; the light emitting function portion is located in the corresponding pixel opening, located on a side of the corresponding pixel defining portion away from the substrate, and located in the corresponding second gap.

12. The display panel according to claim 11, characterized in that: The side wall of the partition structure close to the partition opening is a first side wall, the dimension of the first side wall along the direction from one end close to the substrate to one end away from the substrate is A, the dimension of the first side wall along the thickness direction of the substrate is C, the distance between the pixel defining portion and the corresponding first side wall is E, and A, C, and E satisfy the following formula: AND 2 ≥A 2 -C 2 。 13. The display panel according to any one of claims 1 to 4, characterized in that: The thickness of the light-emitting functional part is G, the dimension of the side wall of the partition structure close to the partition opening along the thickness direction of the substrate is C, and C and G satisfy the following formula: G≤C.

14. The display panel according to any one of claims 1 to 4, characterized in that: The display panel includes an auxiliary electrode, which is disposed between the partition structure and the substrate and connected to the partition structure. The partition structure is a conductive member.

15. The display panel according to claim 14, characterized in that: The display panel includes a plurality of second electrodes, the plurality of second electrodes are arranged corresponding to the plurality of light-emitting functional parts, the second electrodes are arranged between the corresponding light-emitting functional parts and the substrate, and the second electrodes and the auxiliary electrodes are arranged in the same layer and with the same material.

16. The display panel according to claim 14, characterized in that: The surface of the partition structure facing the substrate is a first surface, the surface of the auxiliary electrode facing the substrate is a second surface, and the orthographic projection of the first surface on the substrate is within the orthographic projection of the second surface on the substrate.

17. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-16.

18. A method for preparing a display panel, characterized in that: include: providing a substrate; A partition structure is formed on one side of the substrate; the partition structure is provided with a plurality of partition openings; A plurality of light-emitting functional parts are formed on one side of the substrate; the plurality of light-emitting functional parts are arranged correspondingly to the plurality of partition openings, and at least a portion of the light-emitting functional parts is arranged in the corresponding partition openings; Wherein, the partition structure includes a first partition wall located between two adjacent partition openings, the first partition wall includes a first extension section, a second extension section and a third extension section, the first extension section is located on a side of the second extension section close to one of the partition openings, and the third extension section is located on a side of the second extension section close to another partition opening; an end of the first extension section close to the substrate is connected to the second extension section, an end of the first extension section facing away from the substrate is inclined relative to an end close to the substrate in a direction away from the third extension section, an end of the third extension section close to the substrate is connected to the second extension section, and an end of the third extension section facing away from the substrate is inclined relative to an end close to the substrate in a direction away from the first extension section.

19. The method for preparing a display panel according to claim 18, characterized in that: Before forming the partition structure on one side of the substrate, the method comprises: forming a pixel defining material layer on one side of the substrate; forming a first opening on the pixel defining material layer; The partition structure is formed on one side of the substrate, comprising: forming a partition material layer on a side of the pixel definition material layer facing away from the substrate and in the first opening; The partition material layer outside the first opening is removed, and the partition material layer inside the first opening is retained to form the partition structure.

20. The method for preparing a display panel according to claim 19, characterized in that: After forming the partition structure on one side of the substrate, the method comprises: removing the pixel defining material layer; A photoresist material layer is formed on one side of the substrate; the photoresist material layer includes a plurality of photoresist material portions, the photoresist material portions are arranged corresponding to the plurality of partition openings, the photoresist material portions are arranged in the corresponding partition openings, the photoresist material portions include a first sub-portion, a second sub-portion and a third sub-portion, the second sub-portion is arranged at the periphery of the first sub-portion, and the third sub-portion is arranged at the periphery of the second sub-portion; exposing part of the photoresist material layer; The first sub-portion is removed by development to form a pixel opening, the third sub-portion is removed by development to form a second gap, and the second sub-portion is retained to form a pixel defining portion.

21. The method for preparing a display panel according to claim 19, characterized in that: The pixel defining material layer includes a plurality of pixel defining material portions, the pixel defining material portions are arranged corresponding to the plurality of partition openings, the pixel defining material portions are arranged in the corresponding partition openings, the pixel defining material portions include a fourth sub-portion, a fifth sub-portion and a sixth sub-portion, the fifth sub-portion is arranged at the periphery of the fourth sub-portion, and the sixth sub-portion is arranged at the periphery of the fifth sub-portion; After forming the partition structure on one side of the substrate, the method comprises: A mask layer is formed on a side of the fifth sub-section facing away from the substrate; the fourth sub-section and the sixth sub-section are both exposed outside the mask layer; removing the fourth sub-portion to form a pixel opening, removing the sixth sub-portion to form a second gap, and retaining the fifth sub-portion to form a pixel defining portion; The mask layer is removed.

22. The method for preparing a display panel according to claim 19, characterized in that: Before forming a pixel defining material layer on one side of the substrate, the method comprises: forming a conductive material layer on one side of the substrate; The conductive material layer is patterned to form a plurality of second electrodes and auxiliary electrodes; the first opening exposes the auxiliary electrodes.

23. The method for preparing a display panel according to any one of claims 18 to 22, characterized in that: After forming a plurality of light-emitting functional parts on one side of the substrate, the method comprises: forming a first electrode on a side of the light emitting functional portion and the partition structure away from the substrate; Wherein, the first electrode is formed by evaporation; the evaporation angle of the first electrode is smaller than the angle between any one of the first extension segment and the second extension segment and the substrate; and / or, The light-emitting functional part is formed by evaporation; the evaporation angle of the light-emitting functional part is equal to the angle between any one of the first extension section and the second extension section and the substrate.

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