Display panel

Abstract

The invention relates to a display panel. The display panel comprises an array substrate, a first flat layer, a first electrode layer and a light-emitting functional layer, the first flat layer is arranged above the array substrate, and the first flat layer comprises a plurality of first openings; the first electrode layer comprises a plurality of first electrodes, each first electrode comprises a main electrode and a gain electrode extending to the edge of the main electrode, the main electrode is located on the bottom wall of the first opening, and the gain electrode is located on the side wall of the first opening; the gain electrode is higher than the position of the main electrode in the first opening; and the light-emitting functional layer is arranged on the main electrode and the gain electrode. The visual angle of the display panel can be effectively improved, and then the display effect is improved.

Description

Technical Field

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

[0002] Organic Light Emitting Display (OLED) display panels have the properties of self-luminescence, low driving voltage, high luminous efficiency, short response time, high clarity and contrast, and can achieve flexible display.

[0003] However, the viewing angle limitation of existing OLED display panels has a significant impact on the display effect. Summary of the invention

[0004] An embodiment of the present application provides a display panel, and the display panel of the present application can improve the viewing angle and the display effect of the display panel.

[0005] The present application provides a display panel, the display panel comprising:

[0006] An array substrate;

[0007] A first flat layer, disposed above the array substrate, wherein the first flat layer comprises a plurality of first openings;

[0008] a first electrode layer, comprising a plurality of first electrodes, wherein the first electrodes include a main electrode and a gain electrode extending from an edge of the main electrode, the main electrode being located on a bottom wall of the first opening, the gain electrode being located on a side wall of the first opening, and the gain electrode being higher than a position of the main electrode in the first opening; and

[0009] The light-emitting functional layer is arranged on the main electrode and the gain electrode.

[0010] In some embodiments, the display panel further comprises:

[0011] The pixel definition layer is disposed above the first planar layer, and the pixel definition layer includes a plurality of second openings, wherein the second openings at least partially overlap with the first openings.

[0012] In some embodiments, the light-emitting functional layer is located in a pixel opening formed by the first opening and the second opening, and a light-emitting surface of the light-emitting functional layer is higher than the gain electrode and is connected to the pixel definition layer.

[0013] In some embodiments, the gain electrode extends to an end surface of the first planar layer, and the extended end of the gain electrode is located at an overlapped position of the pixel definition layer and the first planar layer.

[0014] In some embodiments, the first planar layer includes a plurality of first sub-planar layers arranged in an array, and one first sub-planar layer is provided with one first opening.

[0015] In some embodiments, the first planar layer includes a plurality of first sub-planar layers arranged at intervals along a first direction, one of the first sub-planar layers is provided with a plurality of first openings, and the plurality of first openings are arranged along a second direction, wherein the first direction intersects the second direction.

[0016] In some embodiments, the pixel definition layer includes a first sub-pixel definition layer, and the first sub-pixel definition layer is located in the second spacing groove and the first spacing groove, and is partially located above the first electrode.

[0017] In some embodiments, the first sub-pixel definition layer includes a first sub-portion located above the first sub-planarization layer and a second sub-portion located between adjacent first sub-planarization layers, and the first sub-portion is connected to the second sub-portion;

[0018] In a direction perpendicular to the array substrate, the thickness of the second sub-portion is greater than the thickness of the first sub-portion, the first sub-portion is hydrophilic, and the second sub-portion is hydrophobic.

[0019] In some embodiments, the pixel definition layer also includes a second sub-pixel definition layer, the second sub-pixel definition layer is located in the first spacing groove and partially located above the first electrode, the second sub-pixel definition layer is located above the first sub-flat layer and contacts a surface of the first sub-flat layer away from the array substrate, and the second sub-pixel definition layer is hydrophilic.

[0020] The present application provides a display panel. The display panel of the present application first forms a first flat layer on an array substrate, the first flat layer includes a plurality of first openings, and then forms a first electrode layer on the first flat layer, the first electrode layer includes a plurality of first electrodes, the first electrodes include a main electrode and a gain electrode, the main electrode covers the bottom wall of the first opening, and the gain electrode is formed on the side wall of the first opening, and then forms a light-emitting functional layer on the first electrode layer, the light-emitting functional layer covers the main electrode located on the bottom wall of the first opening and the gain electrode located on the side wall of the first opening, so that the light-emitting functional layer located on the side wall of the first opening can also emit light. The display panel of the present application increases the outgoing light of different angles of the light-emitting functional layer on the side wall of the first opening, and at the same time increases the overall light-emitting area of ​​the light-emitting functional layer, so that the viewing angle can be effectively improved, and the display effect of the display panel can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0022] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0023] Figure 1 It is a structural schematic diagram of a display panel provided by the prior art;

[0024] Figure 2 is a light emitting schematic diagram of a display panel provided in an embodiment of the present application;

[0025] Figure 3 is a schematic structural diagram of a display panel provided in an embodiment of the present application;

[0026] Figure 4 is a cross-sectional view of one of the display panels provided in the embodiments of the present application;

[0027] Figure 5 is a top view of a display panel provided by an embodiment of the present application;

[0028] Figure 6 yes Figure 5 A top view of a first planar layer and a first electrode layer of a display panel is provided;

[0029] Figure 7 is a top view of another display panel provided by an embodiment of the present application;

[0030] Figure 8 yes Figure 7 A top view of a first planar layer and a first electrode layer of a display panel is provided;

[0031] Fig. 9 yes Figure 7 A BB cross-sectional view of a display panel is provided.

[0032] Description of reference numerals:

[0033] 100, display panel; 101, pixel opening; 110, array substrate; 111, substrate; 112, drive circuit layer; 113, second flat layer; 120, first flat layer; 121, first opening; 1211, bottom wall; 1212, side wall; 1213, end face; 122, first sub-flat layer; 123, second spacing groove; 130, first electrode layer; 131, first electrode; 1311, main electrode; 1312, gain electrode; 132, first spacing groove; 140, light-emitting functional layer; 150, pixel definition layer; 1501, first sub-pixel definition layer; 1502, second sub-pixel definition layer; 151, second opening; 152, first sub-portion; 153, second sub-portion; 160, second electrode layer. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0035] Please refer to Figure 1 , Figure 1 It is a cross-sectional view of a display panel in the prior art. The display panel includes an array substrate 110, a first electrode layer 130, a pixel definition layer 150 and a light-emitting functional layer 140. Among them, the pixel definition layer 150 is located on the side of the first electrode layer 130 away from the array substrate 110, and includes a plurality of pixel openings 101, and the pixel openings 101 expose a portion of the first electrode layer 130; the light-emitting functional layer 140 is located on the side of the first electrode layer 130 away from the array substrate 110, and is located in the pixel openings 101. In the prior art, only the bottom wall of the pixel opening 101 is covered with the first electrode layer 130, so only the light-emitting functional layer 140 on the bottom wall of the pixel opening 101 emits light, and the direction of the emitted light of the light-emitting functional layer 140 is as shown in FIG. Figure 1 As shown in the direction of the middle arrow, the viewing angle of the display panel is limited.

[0036] To solve the above problems, the present application provides a display panel 100. Figure 2-Figure 3The present application provides a display panel 100, which includes an array substrate 110, a first flat layer 120, a first electrode layer 130, and a light-emitting functional layer 140. The first flat layer 120 is disposed above the array substrate 110, and the first flat layer 120 includes a plurality of first openings 121; the first electrode layer 130 includes a plurality of first electrodes 131, and the plurality of first electrodes 131 correspond to the plurality of first openings 121 one by one, and the first electrodes 131 include a main electrode 1311 and a gain electrode 1312 extending from the edge of the main electrode 1311, the main electrode 1311 is located on the bottom wall 1211 of the first opening 121, the gain electrode 1312 is located on the side wall 1212 of the first opening 121, and the gain electrode 1312 is higher than the position of the main electrode 1311 in the first opening 121; the light-emitting functional layer 140 is located above the main electrode 1311 and the gain electrode 1312, that is, the light-emitting functional layer 140 covers the first electrode 131.

[0037] Furthermore, the display panel 100 includes a second electrode layer 160 , and the second electrode layer 160 is disposed on a side of the light emitting functional layer 140 away from the first electrode layer 130 .

[0038] In the present application, the first electrode 131 is formed in the first opening 121 of the first flat layer 120, and includes a main electrode 1311 and a gain electrode 1312. The main electrode 1311 covers the bottom wall 1211 of the first opening 121, and the gain electrode 1312 is located on the side wall 1212 of the first opening 121. The light-emitting functional layer 140 covers the main electrode 1311 located on the bottom wall 1211 of the first opening 121 and the gain electrode 1312 located on the side wall 1212 of the first opening 121. Therefore, the light-emitting functional layer 140 located on the bottom wall 1211 and the side wall 1212 of the first opening 121 can emit light. However, the angle of the light emitted by the light-emitting functional layer 140 located on the side wall 1212 of the first opening 121 is different from the angle of the light emitted by the light-emitting functional layer 140 located on the bottom wall 1211 of the first opening 121. Compared to the prior art, the display panel 100 of the present application increases the outgoing light at different angles of the light-emitting functional layer 140 on the side wall 1212 of the first opening 121, thereby improving the viewing angle. At the same time, since the light-emitting functional layer 140 on the side wall 1212 of the first opening 121 can also emit light, the overall light-emitting area of ​​the light-emitting functional layer 140 is increased, which can further improve the viewing angle, thereby effectively improving the display effect of the display panel 100.

[0039] In some embodiments, please refer to Figure 3-Figure 4The display panel 100 further includes a pixel definition layer 150, which is disposed above the first planar layer 120, that is, on a side of the first planar layer 120 away from the array substrate 110. The pixel definition layer 150 includes a plurality of second openings 151, and the second openings 151 at least partially overlap with the first openings 121, that is, the second openings 151 are connected to the first openings 121. For example, the orthographic projection of the first opening 121 on the array substrate 110 may be located within the range of the orthographic projection of the second opening 151 on the array substrate 110.

[0040] It can be understood that in the present application, the display panel 100 includes a plurality of pixel areas arranged in an array, each pixel area includes a pixel, wherein the first flat layer 120 and the pixel definition layer 150 are stacked to jointly define a plurality of pixel areas of the display panel 100, a first opening 121 and a second opening 151 that are connected jointly define a pixel area, and the first electrode 131, the light-emitting functional layer 140 and the second electrode layer 160 located in a pixel area jointly constitute a pixel, and different pixels on the display panel 100 can emit light of different colors, such as red light, green light or blue light.

[0041] In some embodiments, please refer to Figure 3-Figure 4 , the gain electrode 1312 extends to the end surface 1213 of the first flat layer 120, wherein the end surface 1213 is a side surface of the first flat layer 120 away from the array substrate 110, and the extension end of the gain electrode 1312 is located at the overlap of the first flat layer 120 and the pixel definition layer 150, wherein the extension end refers to the end of the gain electrode 1312 away from the main electrode 1311, so that the gain electrode 1312 covers the entire side wall 1212 of the first opening 121. The light-emitting functional layer 140 is located in the pixel opening formed by the first opening 121 and the second opening 151, and covers the first electrode layer 130. The light-emitting surface of the light-emitting functional layer 140 is higher than the gain electrode 1312, and is connected to the pixel definition layer 150, so that the light-emitting functional layer 140 completely covers the gain electrode 1312 located on the side wall 1212 of the first opening 121.

[0042] For details, please refer to Figure 3-Figure 4, the main electrode 1311 covers the entire bottom wall 1211 of the first opening 121, the gain electrode 1312 covers the entire side wall 1212 of the first opening 121, and the light-emitting functional layer 140 covers the main electrode 1311 located on the bottom wall 1211 of the first opening 121, and covers the gain electrode 1312 located on the side wall 1212 of the first opening 121, so that part of the light-emitting functional layer 140 will be formed on the side wall of the second opening 151. In this embodiment, the first electrode layer 130 covers the entire side wall 1212 of the first opening 121, which can increase the light-emitting area of ​​the light-emitting functional layer 140 located on the side wall to further improve the viewing angle. The pixel definition layer 150 is located above the first planar layer 120 to separate the light-emitting functional layers 140 in adjacent pixel areas to avoid problems such as color mixing.

[0043] In some embodiments, please refer to Figure 4-Figure 6 , multiple first electrodes 131 are arranged at intervals, for example, multiple first electrodes 131 can be arranged in an array along the first direction X and the second direction Y, the first direction X intersects with the second direction Y, and further, the first direction X and the second direction Y can be perpendicular. Among them, multiple first electrodes 131 are arranged in a one-to-one correspondence with multiple first openings 121, and the first electrode 131 covers the first opening 121, that is, the first electrode 131 and the pixel area are in a one-to-one correspondence to achieve independent light emission of each pixel. Since the first electrodes 131 are arranged at intervals, there are first spacing grooves 132 between adjacent first electrodes 131, and at least part of the pixel definition layer 150 is located in the first spacing grooves 132. For example, the pixel definition layer 150 fills the first spacing grooves 132 to space and insulate adjacent first electrodes 131.

[0044] In some embodiments, please refer to Figure 4 , at least part of the first electrode layer 130 is also formed on the end surface 1213 of the first flat layer 120, that is, at least part of the gain electrode 1312 is located on the end surface 1213 of the first flat layer 120. In the process of forming the first electrode layer 130, firstly, the first electrode material is deposited on the entire surface of the first flat layer 120 on the side away from the array substrate 110, and then the first electrode material is patterned. In order to ensure that the first electrode layer 130 covers the entire side wall 1212 of the first opening 121 and the convenience of the process, part of the first electrode 131 on the end surface 1213 of the first flat layer 120 will be retained, that is, the first electrode layer 130 also covers at least part of the end surface 1213 of the first flat layer 120. In order to ensure that the light-emitting functional layer 140 is located in the first opening 121 and the second opening 151, the pixel definition layer 150 will cover the part of the first electrode layer 130 located on the end surface 1213 of the first flat layer 120.

[0045] In some embodiments, please refer to Figure 4-Figure 6 ,in Figure 4 for Figure 5 The first flat layer 120 includes a plurality of first sub-flat layers 122 arranged at intervals, each of which has a first opening 121. For example, the plurality of first sub-flat layers 122 may be arranged in an array, that is, the plurality of first sub-flat layers 122 of the display panel 100 correspond to a plurality of pixels in a one-to-one relationship. Each first sub-flat layer 122 includes a first opening 121, and a second spacing groove 123 is provided between adjacent first sub-flat layers 122, and the second spacing groove 123 is connected to the first spacing groove 132.

[0046] For further information, please refer to Figure 4 The pixel definition layer 150 includes a first sub-pixel definition layer 1501, which is located in the second spacing groove 123 and the first spacing groove 132, and is partially located above the first electrode 131. The first sub-pixel definition layer 1501 fills the second spacing groove 123 and the first spacing groove 132, and covers the extended end of the gain electrode 1312 close to the second spacing groove 123, so as to ensure the isolation between two adjacent first sub-planar layers 122 and the isolation between adjacent first electrodes 131.

[0047] In this embodiment, one first opening 121 is correspondingly provided for one first sub-planar layer 122, that is, there is a one-to-one correspondence between the first sub-planar layer 122 and the pixel. In the display panel 100 structure of this embodiment, each first sub-planar layer 122 is independently provided, and adjacent first sub-planar layers 122 are separated by the first sub-pixel definition layer 1501. By printing the ink of the light-emitting function layer 140 in each corresponding pixel area, ink color mixing between adjacent pixels is avoided.

[0048] In some embodiments, please refer to Figure 7-Figure 8 The first flat layer 120 includes a plurality of first sub-flat layers 122 arranged at intervals along the first direction X, and the first sub-flat layers 122 extend along the second direction Y. One first sub-flat layer 122 has a plurality of first openings 121, and the plurality of first openings 121 are arranged along the second direction Y. In this embodiment, each first sub-flat layer 122 includes a plurality of first openings 121, and a second spacing groove 123 is provided between adjacent first sub-flat layers 122, and the second spacing groove 123 is connected to the first spacing groove 132.

[0049] Furthermore, the pixel definition layer 150 includes a first sub-pixel definition layer 1501, which is located in the second spacing groove 123 and the first spacing groove 132, and is partially located above the first electrode layer 130. The first sub-pixel definition layer 1501 fills the second spacing groove 123 and the first spacing groove 132, and covers the extended end of the gain electrode 1312 close to the second spacing groove 123, so as to ensure the isolation between two adjacent first sub-planar layers 122 and the isolation between adjacent first electrodes 131.

[0050] In this embodiment, a plurality of first openings 121 are correspondingly provided on one first sub-planar layer 122. For example, the plurality of first openings 121 may be arranged at intervals along the second direction Y. In the display panel 100 structure of this embodiment, ink of a column of pixels may be printed each time. For example, when the colors of a plurality of pixels arranged along the second direction are the same, ink of a column of pixels arranged along the second direction may be printed at one time. Since the colors of the pixels in the second direction are the same, there is no color mixing problem. A column of pixels may be formed by printing at one time, thereby simplifying the process.

[0051] In some embodiments, please refer to Figure 4 , the first sub-pixel definition layer 1501 includes a first sub-portion 152 located above the first sub-planar layer 122 and a second sub-portion 153 located between adjacent first sub-planar layers 122, the first sub-portion 152 and the second sub-portion 153 are connected; in a direction perpendicular to the array substrate 110, the thickness of the second sub-portion 153 is greater than the thickness of the first sub-portion 152; wherein the first sub-portion 152 is hydrophilic and the second sub-portion 153 is hydrophobic. Specifically, the first sub-portion 152 is located above the end surface 1213 of the first sub-planar layer 122, the thickness of the first sub-portion 152 is d1, the second sub-portion 153 is located between adjacent first sub-planar layers 122, including a portion filled in the second spacing groove 123 (thickness d2), a portion filled in the first spacing groove 132 and a portion located above the first spacing groove 132 (thickness d1), the thickness of the second sub-portion 153 is d1+d2, therefore, the thickness of the second sub-portion 153 is greater than the thickness of the first sub-portion 152. Since the material of the pixel definition layer 150 is a uniformly mixed slurry before coating, and the slurry contains hydrophobic components, after the slurry is coated on the array substrate 110 and during the patterning process, the hydrophobic components in the slurry will migrate to the surface, and the second sub-portion 153 is a thick film area with a larger thickness and more hydrophobic components, and its surface exhibits stronger hydrophobicity, while the first sub-portion 152 is a thin film area with a smaller thickness and less hydrophobic components, and its surface exhibits hydrophilicity relative to the second sub-portion 153.

[0052] Since the light-emitting functional layer 140 is formed by inkjet printing, the ink of the light-emitting functional layer 140 of adjacent pixels is easily mixed above the second sub-portion 153. Therefore, the present application sets the second sub-portion 153 located between adjacent pixels to be hydrophobic, and sets the first sub-portion 152 close to the second opening 151 to be hydrophilic, so that the ink of the light-emitting functional layer 140 of each pixel is formed in the corresponding second opening 151. Since the ink-repellent interface is formed on the surface of the second sub-portion 153, the ink of the light-emitting functional layer 140 of adjacent pixels can be prevented from mixing on the surface of the second sub-portion 153.

[0053] In some embodiments, please refer to Fig. 9 The pixel definition layer 150 also includes a second sub-pixel definition layer 1502, which is located in the first spacing groove 132 and partially located above the first electrode 131. The second sub-pixel definition layer 1502 fills the first spacing groove 132 and covers the extended end of the gain electrode 1312 to ensure that adjacent first electrodes 131 are separated. The second sub-pixel definition layer 1502 is located above the first sub-planar layer 122 and contacts the surface of the first sub-planar layer 122 away from the array substrate 110. The second sub-pixel definition layer 1502 is hydrophilic. Please refer to Figure 8-Figure 9 Since the first sub-planar layer 122 of the display panel 100 includes a plurality of first openings 121 in the second direction Y, that is, the first sub-planar layer 122 between adjacent first openings 121 in the second direction Y is not separated, the second sub-pixel definition layer 1502 is located on the end surface of the first sub-planar layer 122 and filled in the second spacing groove 123. The second sub-pixel definition layer 1502 is relatively thin and is a thin film region, so it exhibits hydrophilicity, similar to the above-mentioned first sub-portion 152. The hydrophilicity of the second sub-pixel definition layer 1502 is conducive to uniform spreading of ink.

[0054] for Figure 6-Figure 7 For example, please refer to Figure 4 and Figure 6 Since each pixel of the display panel 100 is independently inkjet printed, adjacent first sub-planar layers 122 are separated by the first sub-pixel definition layer 1501, and the hydrophobic effect of the second sub-portion 153 is used to avoid color mixing of adjacent pixels during the inkjet printing process.

[0055] for Figure 7-Figure 8 For example, please refer to Figure 4 , Figure 7 and Fig. 9 ,in Figure 4 for Figure 7 The cross-sectional view at AA, Fig. 9 for Figure 7Since the display panel 100 is printed with inkjet printing in one time for multiple pixels along the second direction Y, Fig. 9 As shown, there is no need to set the hydrophobic second sub-portion 153 between adjacent pixels along the second direction Y, and the hydrophilicity of the second sub-pixel definition layer 1502 can make the ink spread evenly, so that the ink of each pixel is uniform. The multiple pixels along the first direction X are independently printed by inkjet printing. Therefore, Figure 4 As shown, adjacent first sub-planar layers 122 along the first direction X are separated by the first sub-pixel definition layer 1501 , and the hydrophobic effect of the second sub-portion 153 is used to prevent adjacent pixels along the first direction X from mixing colors during inkjet printing.

[0056] In this application, please refer to Figure 3 , the array substrate 110 includes a substrate 111, a driving circuit layer 112 and a second flat layer 113. The driving circuit layer 112 is arranged above the substrate 111, and includes a gate, a gate insulating layer, an active layer, and a source and a drain, wherein the source and the drain are connected to the active layer. The structure of the driving circuit layer 112 can refer to the thin film transistor structure in the prior art and is not limited here. The second flat layer 113 is arranged on the side of the driving circuit layer 112 away from the substrate 111. Specifically, the second flat layer 113 is located on the side of the source and the drain away from the active layer, and a via is provided on the second flat layer 113. The first flat layer 120 is arranged on the side of the second flat layer 113 away from the driving circuit layer 112; the first electrode layer 130 is connected to the source or the drain through a via.

[0057] Furthermore, the display panel 100 further includes an encapsulation layer (not shown in the figure), which covers the second electrode layer 160 to protect the display panel 100. The encapsulation layer may include one or more layers of inorganic films or organic films, which are not specifically limited herein.

[0058] In some embodiments, the material of the first planar layer 120 is the same as that of the second planar layer 113. The first planar layer 120 and the second planar layer 113 can be formed using the same process. For example, a half-tone mask process can be used for patterning to form the patterns of the second planar layer 113 and the first planar layer 120 at one time, thereby saving mask processes and simplifying the process.

[0059] In other embodiments, the first planar layer 120 and the second planar layer 113 may also be patterned in two steps, that is, the second planar layer 113 is patterned using one photomask process, and the first planar layer 120 is patterned using one photomask process, which is not limited here.

[0060] The present application also provides a method for manufacturing a display panel 100, and the method for manufacturing the display panel 100 includes:

[0061] S1 . Form an initial first planar layer on the array substrate 110 , and pattern the initial first planar layer to form a first planar layer 120 . The first planar layer 120 includes a plurality of first openings 121 .

[0062] The first planar layer 120 may include a plurality of first sub-planar layers 122 spaced apart, and each first sub-planar layer 122 has one or at least two first openings 121. The first planar layer 120 may be made of an organic material, such as polyimide (PI), organic resin, etc., but is not limited thereto.

[0063] S2. An initial first electrode layer is formed on a side of the first flat layer 120 away from the array substrate 110, and the initial first electrode layer is patterned to form a first electrode layer 130. The first electrode layer 130 includes a plurality of first electrodes 131. The plurality of first electrodes 131 correspond one-to-one to the plurality of first openings 121. The first electrode 131 includes a main electrode 1311 and a gain electrode 1312 extending from an edge of the main electrode 1311. The main electrode 1311 is located on a bottom wall 1211 of the first opening 121, and the gain electrode 1312 is located on a side wall 1212 of the first opening 121, and the gain electrode 1312 is higher than the position of the main electrode 1311 in the first opening 121.

[0064] The plurality of first electrodes 131 are arranged at intervals, and a first spacing groove 132 is provided between adjacent first electrodes 131, and at least a portion of the pixel definition layer 150 is located in the first spacing groove 132. The first electrode layer 130 may be an anode, and the material of the first electrode layer 130 includes at least one of a metal oxide or a metal, the metal oxide may be indium tin oxide (ITO), etc., and the metal may be Ag, Mg, Al, etc., but is not limited thereto.

[0065] S3. Form a light-emitting functional layer 140 on the first electrode layer 130 . The light-emitting functional layer 140 is located above the main electrode 1311 and the gain electrode 1312 .

[0066] The light-emitting functional layer 140 may be printed into the first opening 121 by inkjet printing to form the light-emitting functional layer 140. The light-emitting functional layer 140 includes at least an organic light-emitting layer, and the light-emitting functional layer 140 may also include at least one of a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL), etc., which are not limited here.

[0067] S4. Forming a second electrode layer 160 on the light-emitting functional layer 140 .

[0068] The second electrode layer 160 covers the light emitting functional layer 140 and the pixel definition layer 150. The second electrode layer 160 may be a cathode, and the material of the second electrode layer 160 includes metal, such as Al, Mg, etc., but is not limited thereto.

[0069] In some embodiments, the method further includes the following steps before step S3:

[0070] An initial pixel definition layer is formed on a side of the first electrode layer 130 and the first flat layer 120 away from the array substrate 110, and the initial pixel definition layer is patterned to form a pixel definition layer 150, wherein the pixel definition layer 150 includes a plurality of second openings 151, and the second openings 151 at least partially overlap with the first openings 121, wherein the gain electrode 1312 extends to an end surface of the first flat layer 120, and an extended end of the gain electrode 1312 is located at the overlapping portion of the first flat layer 120 and the pixel definition layer 150.

[0071] In this embodiment, the light-emitting functional layer 140 is located in the pixel opening formed by the first opening 121 and the second opening 151 and covers the first electrode layer 130 . The light-emitting surface of the light-emitting functional layer 140 is higher than the gain electrode 1312 and is connected to the pixel definition layer 150 .

[0072] The pixel definition layer 150 also fills the first spacing grooves 132 between adjacent first electrodes 131 and the second spacing grooves 123 between adjacent first sub-planar layers 122. The material of the pixel definition layer 150 can be an organic material, such as polyimide (PI), organic resin, etc., but is not limited thereto.

[0073] In some embodiments, the step of forming the first planar layer 120 on the array substrate 110 includes:

[0074] S11, providing a substrate 111.

[0075] The substrate 111 may be a flexible substrate, such as polyimide (PI), or a rigid substrate, such as glass, but is not limited thereto.

[0076] S12 , forming a driving circuit layer 112 on the substrate 111 .

[0077] Among them, the driving circuit layer 112 includes a gate, a gate insulating layer, an active layer, and a source and a drain, wherein the source and the drain are connected to the active layer. The preparation method of the driving circuit layer 112 can refer to the preparation method of the thin film transistor structure in the prior art and is not limited here.

[0078] S13, forming an initial flat layer on the side of the driving circuit layer 112 away from the substrate 111, and patterning the initial flat layer to form a second flat layer 113 and a first flat layer 120, the second flat layer 113 includes a via hole connecting the source and the drain, the first flat layer 120 is located on the side of the second flat layer 113 away from the driving circuit layer 112, and the first flat layer 120 includes a plurality of first openings 121.

[0079] In this embodiment, the material of the first planar layer 120 is the same as that of the second planar layer 113 . The first planar layer 120 and the second planar layer 113 can be formed by the same process to save mask processes.

[0080] In some other embodiments, the step of forming the first planar layer 120 on the array substrate 110 includes:

[0081] S11, providing a substrate 111;

[0082] S12, forming a driving circuit layer 112 on the substrate 111;

[0083] S13, forming an initial second flat layer on a side of the driving circuit layer 112 away from the substrate 111, and patterning the initial second flat layer to form a second flat layer 113, wherein the second flat layer 113 includes a via hole connecting the source electrode and the drain electrode;

[0084] S14 , forming an initial first planar layer on a side of the second planar layer 113 away from the driving circuit layer 112 , and patterning the initial first planar layer to form a first planar layer 120 , wherein the first planar layer 120 includes a plurality of first openings 121 .

[0085] In this embodiment, the material of the first planar layer 120 and the material of the second planar layer 113 may be the same or different, and the first planar layer 120 and the second planar layer 113 may be patterned using one photomask process respectively.

[0086] The present application provides a display panel. The display panel of the present application first forms a first flat layer on an array substrate, the first flat layer includes a plurality of first openings, and then forms a first electrode layer on the first flat layer, the first electrode layer includes a plurality of first electrodes, the first electrodes include a main electrode and a gain electrode, the main electrode covers the bottom wall of the first opening, and the gain electrode is formed on the side wall of the first opening, and then forms a light-emitting functional layer on the first electrode layer, the light-emitting functional layer covers the main electrode located on the bottom wall of the first opening and the gain electrode located on the side wall of the first opening, so that the light-emitting functional layer located on the side wall of the first opening can also emit light. The display panel of the present application increases the outgoing light of different angles of the light-emitting functional layer on the side wall of the first opening, and at the same time increases the overall light-emitting area of ​​the light-emitting functional layer, so that the viewing angle can be effectively improved, and the display effect of the display panel can be improved.

[0087] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0088] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0089] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0090] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A display panel, characterized in that: include: An array substrate; A first flat layer, disposed above the array substrate, wherein the first flat layer comprises a plurality of first openings; A first electrode layer, comprising a plurality of first electrodes, wherein the first electrodes include a main electrode and a gain electrode extending from an edge of the main electrode, wherein the main electrode is located on a bottom wall of the first opening, and the gain electrode is located on a side wall of the first opening, and the gain electrode is higher than a position of the main electrode in the first opening; as well as The light-emitting functional layer is arranged on the main electrode and the gain electrode.

2. The display panel according to claim 1, characterized in that: The display panel further includes: The pixel definition layer is disposed above the first planar layer, and the pixel definition layer includes a plurality of second openings, wherein the second openings at least partially overlap with the first openings.

3. The display panel according to claim 2, characterized in that: The light-emitting functional layer is located in a pixel opening formed by the first opening and the second opening. The light-emitting functional layer has a light-emitting surface higher than the gain electrode and is connected to the pixel definition layer.

4. The display panel according to claim 2, characterized in that: The gain electrode extends to an end surface of the first planar layer, and an extending end of the gain electrode is located at an overlapping position of the pixel definition layer and the first planar layer.

5. The display panel according to claim 4, characterized in that: The first planar layer includes a plurality of first sub-planar layers arranged in an array, and one first sub-planar layer is provided with one first opening.

6. The display panel according to claim 4, characterized in that: The first planar layer includes a plurality of first sub-planar layers arranged at intervals along a first direction, one of the first sub-planar layers is provided with a plurality of first openings, and the plurality of first openings are arranged along a second direction, wherein the first direction intersects the second direction.

7. The display panel according to claim 5 or 6, characterized in that: A first spacing groove is provided between adjacent first electrodes, a second spacing groove is provided between adjacent first sub-planar layers, and the second spacing groove is connected to the first spacing groove.

8. The display panel according to claim 7, characterized in that: The pixel definition layer includes a first sub-pixel definition layer, and the first sub-pixel definition layer is located in the second spacing groove and the first spacing groove, and is partially located above the first electrode.

9. The display panel according to claim 8, characterized in that: The first sub-pixel definition layer comprises a first sub-portion located above the first sub-planarization layer and a second sub-portion located between adjacent first sub-planarization layers, wherein the first sub-portion is connected to the second sub-portion; In a direction perpendicular to the array substrate, the thickness of the second sub-portion is greater than the thickness of the first sub-portion, the first sub-portion is hydrophilic, and the second sub-portion is hydrophobic.

10. The display panel according to claim 8, characterized in that: The pixel definition layer also includes a second sub-pixel definition layer, which is located in the first spacing groove and partially located above the first electrode. The second sub-pixel definition layer is located above the first sub-flat layer and contacts a surface of the first sub-flat layer away from the array substrate, and the second sub-pixel definition layer is hydrophilic.

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