Array substrate, display panel, display device and method for preparing array substrate

Abstract

The embodiment of the present application provides an array substrate, a display panel, a display device and a method for preparing the array substrate, wherein the array substrate comprises: a substrate; a thin film transistor layer, arranged on a side surface of the substrate; a pixel flat layer, arranged on a side surface of the thin film transistor layer away from the substrate; at least one inclined portion, in the direction from the substrate toward the pixel flat layer, the two side surfaces of the inclined portion are respectively a first surface and a second surface, the first surface is in contact with the side surface of the pixel flat layer away from the substrate, and the second surface is inclined relative to the first surface. The technical solution of the embodiment of the present application can improve the color gamut of the display panel, reduce color deviation, and thus improve the display effect.

Description

Technical Field

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

[0002] Organic Light-Emitting Diode (OLED) is a new generation of light-emitting display technology after liquid crystal display. It has the advantages of wide viewing angle, high contrast, bright colors, and flexible display. It has been widely used in various mobile phones and wearable devices and has good prospects.

[0003] In the related technology, the top-emitting microcavity solution is widely used in mass production of OLED screens, which can effectively improve screen resolution, front efficiency and color gamut coverage. However, since the green light source of current OLED devices usually uses phosphorescent materials, its spectrum is wide and the color gamut is low. Summary of the invention

[0004] Embodiments of the present application provide an array substrate, a display panel, a display device, and a method for manufacturing an array substrate to solve or alleviate one or more technical problems in the prior art.

[0005] As a first aspect of an embodiment of the present application, an embodiment of the present application provides an array substrate, including:

[0006] substrate;

[0007] A thin film transistor layer is disposed on one surface of the substrate;

[0008] A pixel planarization layer is arranged on a surface of the thin film transistor layer which is away from the substrate;

[0009] At least one inclined portion, in the direction along the substrate toward the pixel flat layer, the two side surfaces of the inclined portion are respectively a first surface and a second surface, the first surface is in contact with a side surface of the pixel flat layer away from the substrate, and the second surface is inclined relative to the first surface.

[0010] In one embodiment, the angle between the second surface and the first surface is α, wherein 5°≤α≤15°.

[0011] In one embodiment, one end of the second surface is connected to the first surface, and the other end of the second surface extends obliquely in a direction away from the first surface; or both ends of the second surface are spaced apart from the first surface, and the distances between the two ends of the second surface and the first surface are different.

[0012] As a second aspect of an embodiment of the present application, an embodiment of the present application provides a display panel, including:

[0013] An array substrate, which is an array substrate according to any one of the above-mentioned aspects of the present application;

[0014] The light emitting device is arranged on the surface of the pixel flat layer and the inclined portion on a side away from the substrate.

[0015] In one embodiment, the light-emitting device includes a plurality of pixel units, each pixel unit includes at least one first color sub-pixel, at least one second color sub-pixel and at least one third color sub-pixel of different colors, the number of first color sub-pixels is greater than the number of second color sub-pixels, and the number of first color sub-pixels is greater than the number of third color sub-pixels, wherein the first color sub-pixels are arranged on the second surface of the inclined portion, and the second color sub-pixels and the third color sub-pixels are arranged on the surface of the pixel flat layer on the side facing away from the substrate.

[0016] In one embodiment, a plurality of pixel units include at least one first pixel unit, the first pixel unit includes two first color sub-pixels, and the inclined portions corresponding to the two first color sub-pixels of the first pixel unit are respectively a first inclined portion and a second inclined portion, wherein the second surface of the first inclined portion and the second surface of the second inclined portion are symmetrical about a first symmetry plane, and the first symmetry plane is perpendicular to the substrate.

[0017] In one embodiment, the multiple pixel units also include at least one second pixel unit, the second pixel unit includes two first color sub-pixels, and the inclined portions corresponding to the two first color sub-pixels of the second pixel unit are respectively a third inclined portion and a fourth inclined portion, wherein the second surface of the third inclined portion and the second surface of the fourth inclined portion are symmetrical about the second symmetry plane, the second symmetry plane is perpendicular to the substrate, and the second symmetry plane is not parallel to the first symmetry plane.

[0018] In one implementation, at least one first pixel unit is adjacent to at least one second pixel unit, and the first symmetry plane is perpendicular to the second symmetry plane.

[0019] In one implementation, the first color sub-pixel is a green sub-pixel, the second color sub-pixel is a blue sub-pixel, and the third color sub-pixel is a red sub-pixel.

[0020] In one embodiment, each sub-pixel includes a first electrode, an organic light-emitting layer, and a second electrode. The first electrode is arranged on a side surface of the pixel flat layer facing away from the substrate or a second surface of the inclined portion, the organic light-emitting layer is arranged on a side surface of the first electrode facing away from the substrate, and the second electrode is arranged on a side surface of the organic light-emitting layer facing away from the substrate. The organic light-emitting layer emits light under the action of the electric field of the first electrode and the second electrode.

[0021] As a third aspect of an embodiment of the present application, an embodiment of the present application provides a display device, including a display panel according to any one of the above-mentioned aspects of the present application.

[0022] As a fourth aspect of the embodiment of the present application, the embodiment of the present application provides a method for preparing an array substrate, comprising:

[0023] forming a substrate;

[0024] forming a thin film transistor layer on one surface of the substrate;

[0025] forming a pixel planarization layer on a surface of the thin film transistor layer on a side facing away from the substrate;

[0026] At least one inclined portion is formed, and the two side surfaces of the inclined portion in the direction away from the substrate are respectively a first surface and a second surface, the first surface is in contact with the side surface of the pixel flat layer away from the substrate, and the second surface is inclined relative to the first surface.

[0027] In one embodiment, forming at least one inclined portion comprises:

[0028] Performing evaporation deposition on a surface of the pixel flat layer that is away from the substrate;

[0029] The thickness of the coating layer in different areas is changed by controlling the size of the mesh opening, so that the coating layer forms an inclined portion where the second surface is inclined relative to the first surface.

[0030] In one embodiment, forming at least one inclined portion comprises:

[0031] Two spacers are formed on a surface of the pixel flat layer that is away from the substrate and is spaced apart from each other;

[0032] disposing a molten material between two spacers;

[0033] The substrate is tilted to change the thickness of the molten material in different regions, so that after the molten material solidifies, an inclined portion is formed in which the second surface is tilted relative to the first surface.

[0034] The embodiment of the present application adopts the above technical solution to improve the color gamut of the display panel and reduce color deviation by setting the inclined portion, thereby improving the display effect.

[0035] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0037] Figure 1 A schematic structural diagram of an array substrate according to an embodiment of the present application is shown;

[0038] Figure 2 A schematic structural diagram of a display panel according to a first embodiment of the present application is shown;

[0039] Figure 3 A schematic structural diagram of a display panel according to a second embodiment of the present application is shown;

[0040] Figure 4 A schematic structural diagram of a display panel according to a third embodiment of the present application is shown;

[0041] Figure 5 A schematic structural diagram of a display panel according to a fourth embodiment of the present application is shown;

[0042] Figure 6 A graph showing the variation of color coordinates of a display panel with viewing angle according to an embodiment of the present application;

[0043] Figure 7 A graph showing how the color coordinates of a display panel vary with viewing angle according to another embodiment of the present application;

[0044] Figure 8 A schematic diagram of preparing an inclined portion according to an embodiment of the present application is shown.

[0045] Description of reference numerals:

[0046] 100: array substrate;

[0047] 110: substrate; 120: thin film transistor layer; 130: pixel flat layer; 140: inclined portion; 141: first inclined portion; 142: second inclined portion;

[0048] 200: display panel;

[0049] 210: first color sub-pixel; 211: first electrode; 212: organic light-emitting layer; 213: second electrode; 220: second color sub-pixel; 230: third color sub-pixel;

[0050] 300: Isolation piece. DETAILED DESCRIPTION

[0051] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0052] In the related technology, the top-emitting microcavity solution has obvious viewing angle color shift, and because the green light source of the current OLED device uses phosphorescent materials, its spectrum is relatively wide, and the top-emitting green light color coordinate CIE x is generally above 0.250, it is difficult to achieve the green light color coordinate of CIE x of 0.170 in the BT.2020 color gamut standard.

[0053] Combine the following Figure 1-Figure 5 The array substrate according to the first embodiment of the present application is described. The array substrate can be applied to a display panel. In the following description of the present application, the application of the array substrate to a display panel is taken as an example for explanation.

[0054] like Figure 1 and Figure 2 As shown, the array substrate 100 includes: a substrate 110 , a thin film transistor layer 120 , a pixel planarization layer 130 and at least one inclined portion 140 .

[0055] Specifically, the thin film transistor layer 120 is disposed on one side surface of the substrate 110, and the pixel flat layer 130 is disposed on one side surface of the thin film transistor layer 120 that is away from the substrate 110. In the direction from the substrate 110 toward the pixel flat layer 130, the two side surfaces of the inclined portion 140 are respectively a first surface and a second surface, the first surface is in contact with the one side surface of the pixel flat layer 130 that is away from the substrate 110, and the second surface is disposed obliquely relative to the first surface.

[0056] Exemplarily, when the array substrate 100 is applied to the display panel 200, the array substrate 100 can be used for the preparation of an organic light-emitting device, and the organic light-emitting device can be arranged on the second surface. The organic light-emitting device can include an anode, a cathode, and an organic light-emitting layer 212 located between the anode and the cathode. The anode can be fully reflective and the cathode can be semi-reflective, and a microcavity is formed between the fully reflective anode and the semi-reflective cathode. When the cavity length between the two electrodes is at the same order of magnitude as the wavelength of light emitted in the organic light-emitting layer 212, the optical properties of the light-emitting device will change significantly, and light of a specific wavelength will be selected and enhanced, that is, a microcavity effect will be generated. For example, when the inclined portion 140 is not provided, the microcavity has a maximum enhanced green wavelength of 530nm; after the inclined portion 140 is provided, the microcavity is tilted relative to the substrate 110, and the microcavity changes. At this time, the microcavity effect becomes weaker, the spectrum is blue-shifted, and a narrower spectrum is presented. The green wavelength enhanced by the microcavity can change accordingly, for example, the enhanced green wavelength becomes 528nm, so that the green light color coordinates change and a higher color gamut is presented.

[0057] According to the array substrate 100 of the embodiment of the present application, by setting at least one inclined portion 140 on the pixel flat layer 130, and making the second surface of the inclined portion 140 inclined relative to the first surface, when the array substrate 100 is applied to the display panel 200, the microcavity effect of the top-emitting microcavity structure becomes weaker, and a narrower spectrum can be presented, thereby being able to present a higher color gamut; on the other hand, when the display panel 200 is viewed from other angles, compared with the planarized structure, the inclined portion 140 set in this way can make the brightness of some pixels dominate, thereby effectively reducing color shift.

[0058] In one embodiment, the angle between the second surface and the first surface is α, where 5°≤α≤15°. Specifically, for example, when α<5°, the inclination angle of the second surface is too small, the improvement effect of the color gamut and color shift is not obvious, and the display brightness may be reduced, and the cost of the array substrate 100 may be increased; when α>15°, the inclination angle of the second surface is too large, and when the array substrate 100 is applied to the display panel 200, the front light extraction efficiency of the light-emitting device may be reduced, and the efficiency of the light-emitting device at different viewing angles may decrease, and the spectrum may become wider. Therefore, by making 5°≤α≤15°, the inclination angle of the second surface is reasonable, and while effectively improving the color gamut and improving the color shift, the display brightness and light extraction efficiency of the display panel 200 can be guaranteed, and the cost can be reduced.

[0059] In an optional embodiment, referring to Figure 1 and Figure 2 , one end of the second surface (e.g., Figure 1 The left end of the second surface (for example, Figure 1The right end of the inclined portion 140 extends obliquely in a direction away from the first surface. In this case, the cross-sectional shape of the inclined portion 140 can be a triangle. In this way, the inclined portion 140 has a simple structure and uses less materials, thereby reducing the difficulty of preparation and the cost of materials.

[0060] Of course, the present application is not limited thereto. In another optional embodiment, both ends of the second surface are spaced apart from the first surface, and the spacing between the two ends of the second surface and the first surface is different. In this case, the extended surface of the second surface intersects with the extended surface of the first surface, so that the second surface can be inclined relative to the first surface. In this case, the cross-sectional shape of the inclined portion 140 can be a trapezoid. It is understood that the specific structure of the inclined portion 140 can be specifically set according to actual needs to better meet practical applications.

[0061] According to the display panel 200 of the second aspect of the present application, Figure 1-Figure 2 , comprising an array substrate 100 and a light emitting device. The array substrate 100 is the array substrate 100 according to any embodiment of the first aspect of the present application, and the light emitting device is arranged on a surface of the pixel flat layer 130 and the inclined portion 140 on a side away from the substrate 110. For example, a portion of the light emitting device opposite to the pixel flat layer 130 may be arranged on the pixel flat layer 130, and a portion of the light emitting device opposite to the inclined portion 140 may be arranged on the inclined portion 140.

[0062] According to the display panel 200 of the embodiment of the present application, by adopting the above-mentioned array substrate 100, the microcavity effect of the top-emitting microcavity structure is weakened, and a narrower spectrum can be presented, thereby being able to present a higher color gamut. Moreover, the setting of the inclined portion 140 can make the brightness of some pixels play a dominant role, thereby effectively reducing color shift.

[0063] Figure 2 and Figure 3 A schematic cross-sectional structure diagram of the display panel 200 corresponding to the first color sub-pixel 210 is shown; Figure 4 A schematic cross-sectional structure diagram of the display panel 200 corresponding to the second color sub-pixel 220 is shown; Figure 5 FIG. 2 is a schematic diagram showing a cross-sectional structure of the display panel 200 corresponding to the third color sub-pixel 230. Figure 1-Figure 5The light emitting device includes a plurality of pixel units, each pixel unit includes at least one first color sub-pixel 210, at least one second color sub-pixel 220 and at least one third color sub-pixel 230 of different colors, the number of the first color sub-pixels 210 is greater than the number of the second color sub-pixels 220, and the number of the first color sub-pixels 210 is greater than the number of the third color sub-pixels 230, wherein the first color sub-pixel 210 is disposed on the second surface of the inclined portion 140, and the second color sub-pixel 220 and the third color sub-pixel 230 are disposed on the surface of the pixel flat layer 130 on the side away from the substrate 110. In the description of the present application, "plurality" means two or more.

[0064] With such a configuration, it is only necessary to set the inclined portion 140 in the area of ​​the pixel flat layer 130 corresponding to the first color sub-pixel 210, and the remaining areas of the pixel flat layer 130 do not need to be provided with the inclined portion 140. The second color sub-pixel 220 and the third color sub-pixel 230 can be directly set on the pixel flat layer 130, which can effectively improve the color gamut of the first color sub-pixel 210 and change the color deviation without significantly reducing the light output efficiency of the display panel 200, while reducing costs.

[0065] In one embodiment, Figure 1-Figure 3 As shown, the multiple pixel units include at least one first pixel unit, the first pixel unit includes two first color sub-pixels 210, and the inclined portions 140 corresponding to the two first color sub-pixels 210 of the first pixel unit are respectively a first inclined portion 141 and a second inclined portion 142, wherein the second surface of the first inclined portion 141 and the second surface of the second inclined portion 142 are symmetrical about the first symmetry plane, and the first symmetry plane is perpendicular to the substrate 110.

[0066] For example, Figure 2 and Figure 3 The cross-sectional structure diagram of the display panel 200 may be respectively corresponding to two first color sub-pixels 210 in the same first pixel unit. The two side surfaces of the substrate 110, the thin film transistor layer 120 and the pixel flat layer 130 in the thickness direction may be parallel to the horizontal plane, and the first surface of the inclined portion 140 is parallel to the horizontal plane, and the first symmetry plane is a vertical plane. The second surface of the inclined portion 140 is inclined relative to the first surface, and the acute angle between the second surface of the first inclined portion 141 and the horizontal plane is equal to the acute angle between the second surface of the second inclined portion 142 and the horizontal plane, and the second surface of the first inclined portion 141 and the second surface of the second inclined portion 142 have different inclination directions.

[0067] Therefore, by setting the above-mentioned first inclined portion 141 and second inclined portion 142, the angles between the first color sub-pixel 210 and the second color sub-pixel 220 of the first pixel unit and the substrate 110 are the same in size and have different inclined directions, thereby effectively improving the first color gamut of the light-emitting device, and at the same time making the display panel 200 have similar color shift levels in different directions, thereby ensuring the display effect of the display panel 200.

[0068] In one embodiment, the multiple pixel units also include at least one second pixel unit, the second pixel unit includes two first color sub-pixels 210, and the inclined portions 140 corresponding to the two first color sub-pixels 210 of the second pixel unit are respectively a third inclined portion and a fourth inclined portion, wherein the second surface of the third inclined portion and the second surface of the fourth inclined portion are symmetrical about the second symmetry plane, the second symmetry plane is perpendicular to the substrate 110, and the second symmetry plane is not parallel to the first symmetry plane.

[0069] Exemplarily, the second symmetry plane may be perpendicular to the first symmetry plane. An xy coordinate system may be established on a horizontal plane, and when the angle between the second surface of the first inclined portion 141 and the positive direction of the x-axis is 10°, the angle between the second surface of the second inclined portion 142 and the negative direction of the x-axis is 10°, the angle between the second surface of one of the third inclined portion and the fourth inclined portion and the positive direction of the y-axis is 10°, and the angle between the second surface of the other of the third inclined portion and the fourth inclined portion and the negative direction of the y-axis is 10°. The second surface of the first inclined portion 141 and the second surface of the second inclined portion 142 may be symmetrical about a vertical plane passing through the y-axis (i.e., the first symmetry plane), and the second surface of the third inclined portion and the second surface of the fourth inclined portion may be symmetrical about a vertical plane passing through the x-axis (i.e., the second symmetry plane).

[0070] Therefore, by setting the above-mentioned third inclined portion 140 and fourth inclined portion 140, the angles between the first color sub-pixel 210 and the second color sub-pixel 220 of the second pixel unit and the substrate 110 are the same in size and have different inclined directions, thereby also being able to improve the first color gamut of the light-emitting device, and at the same time ensuring that the display panel 200 has similar color shift levels in different directions, thereby improving the display effect of the display panel 200.

[0071] In one embodiment, at least one first pixel unit is adjacent to at least one second pixel unit, and the first symmetry plane is perpendicular to the second symmetry plane. In this way, the four first color sub-pixels 210 in at least two adjacent pixel units can have inclination angles in different directions, which can further ensure that the display panel 200 has similar color deviation levels in different directions, thereby further improving the display effect of the display panel 200.

[0072] In one embodiment, the first color sub-pixel 210 is a green sub-pixel, the second color sub-pixel 220 is a blue sub-pixel, and the third color sub-pixel 230 is a red sub-pixel. Since the brightness of the green light source accounts for more than 50% when the display panel 200 displays white light, and green light is a light source that is difficult to approach the BT.2020 standard, by making the green sub-pixel face the inclined portion 140, the color gamut can be effectively improved, and the green light color coordinates can be close to the BT.2020 standard.

[0073] Exemplarily, Table 1 shows the simulation results of a conventional display panel with a high color gamut (the array substrate is not provided with an inclined portion) and a display panel 200 with a high color gamut inclination angle of 10° (the angle between the second surface and the first surface of the inclined portion 140 is 10°). Among them, "high color gamut" can be understood as a color gamut with CIE x close to 0.170, which can be achieved by adjusting the microcavity. Combined with the simulation results of Table 1, compared with the conventional display panel 200 with a high color gamut, the color gamut of the green device of the display panel 200 with a high color gamut inclination angle of 10° (@CIE 1931, @BT.2020, @B CIE=0.138, 0.046, R CIE=0.703, 0.297) is improved by about 1%. In addition, narrow-spectrum green light sources and deep red light sources can be used, which can further make the green light color coordinates close to the BT.2020 color gamut standard, for example, reaching more than 97%.

[0074] Table 1

[0075] CIEx,CIEy Color gamut High color gamut normal conditions 0.185,0.761 92.4％ High color gamut tilt angle 10 degrees 0.174,0.764 93.5％

[0076] Figure 6 and Figure 7 Each point in represents a 5° change in viewing angle. Figure 6 It can be clearly seen from the simulation results in FIG. 1 that the green light color shift trajectory of the display panel 200 with a high color gamut tilt angle of 10 degrees is significantly reduced. Figure 7 It can be clearly seen from the simulation results in that the green light color deviation track of the display panel 200 with an existing structure (i.e., non-high color gamut) with an inclination angle of 10 degrees is significantly reduced. Therefore, by making the green sub-pixel opposite to the inclined portion 140, the green light color gamut of the light-emitting device can be effectively improved, and a smaller color deviation can be achieved. In addition, the setting of the inclined portion 140 can be applied to the high color gamut device structure, and can improve the greening problem at the edge of the curved screen.

[0077] In one embodiment, if Figure 1-Figure 5As shown, each sub-pixel includes a first electrode 211, an organic light-emitting layer 212, and a second electrode 213. The first electrode 211 is disposed on a surface of the pixel flat layer 130 on one side away from the substrate 110 or on the second surface of the inclined portion 140. The organic light-emitting layer 212 is disposed on a surface of the first electrode 211 on one side away from the substrate 110. The second electrode 213 is disposed on a surface of the organic light-emitting layer 212 on one side away from the substrate 110. For example, the first electrode 211 may be an anode, and the second electrode 213 may be a cathode. Thus, the organic light-emitting layer 212 emits light under the action of the electric field of the first electrode 211 and the second electrode 213, so that the display panel 200 can display images.

[0078] A display device according to an embodiment of the third aspect of the present application includes a display panel 200 according to any implementation of the second aspect of the present application.

[0079] According to the display device of the embodiment of the present application, by adopting the above-mentioned display panel 200, the color gamut can be improved and the color shift can be reduced, thereby improving the display effect of the display device.

[0080] According to the method for preparing the array substrate 100 of the fourth aspect of the present application, Figure 1-Figure 5 and Figure 8 ,include:

[0081] forming a substrate 110;

[0082] A thin film transistor layer 120 is formed on one side surface of the substrate 110;

[0083] A pixel planarization layer 130 is formed on a surface of the thin film transistor layer 120 that is away from the substrate 110 ;

[0084] At least one inclined portion 140 is formed, and the two side surfaces of the inclined portion 140 in the direction away from the substrate 110 are respectively a first surface and a second surface. The first surface is in contact with the side surface of the pixel flat layer 130 away from the substrate 110, and the second surface is inclined relative to the first surface.

[0085] Exemplarily, the array substrate 100 can be used for the preparation of an organic light-emitting device, and the organic light-emitting device can be arranged on the second surface. The organic light-emitting device can include an anode, a cathode, and an organic light-emitting layer 212 located between the anode and the cathode. The anode can be fully reflective, and the cathode can be semi-reflective, and a microcavity is formed between the fully reflective anode and the semi-reflective cathode. After the inclined portion 140 is provided, the microcavity is tilted relative to the substrate 110, and the microcavity changes. At this time, the microcavity effect becomes weaker, the spectrum is blue-shifted, and a narrower spectrum is presented. The green wavelength enhanced by the microcavity can change accordingly, so that the green light color coordinates change, and a higher color gamut is presented.

[0086] According to the method for preparing the array substrate 100 of the embodiment of the present application, at least one inclined portion 140 can be formed on the pixel flat layer 130, which can improve the color gamut while reducing color shift, so that the display panel 200 has a better display effect. In addition, since the thin film transistor layer 120 is routed below the pixel flat layer 130, the pixel flat layer 130 may not be completely flat, and the inclined portion 140 can be set as a buffer layer, so that the first electrode 211, such as an anode, is deposited. After that, the first electrode 211 is flatter, thereby effectively improving the color shift phenomenon of large viewing angles, and at the same time, it is conducive to the application of COE (color-filter onencapsulation, color film technology).

[0087] In one embodiment, referring to Figure 1 and Figure 2 , forming at least one inclined portion 140, including:

[0088] Performing evaporation deposition on a surface of the pixel planarization layer 130 that is away from the substrate 110;

[0089] The thickness of the coating layer in different regions is changed by controlling the size of the mesh opening, so that the coating layer forms an inclined portion 140 in which the second surface is inclined relative to the first surface.

[0090] Exemplarily, the material of the inclined portion 140 may be a vapor-depositable small molecule or polymer material, such as lithium fluoride (LiF) or polymethyl methacrylate (PMMA). During preparation, the thickness of the vapor deposition in different regions may be controlled by a mesh screen to form an inclination angle of the inclined portion 140. In the thicker region of the inclined portion 140, the mesh screen opening is controlled to be large or fully open; in the thinner region of the inclined portion 140, the mesh screen opening is controlled to be small or not open, so that the inclined portion 140 can be prepared by the vapor deposition process.

[0091] In another embodiment, referring to Figure 1-Figure 2 Combined with Figure 8 , forming at least one inclined portion 140, including:

[0092] Two spacers 300 are formed at intervals on a surface of the pixel flat layer 130 that is away from the substrate 110 ;

[0093] Disposing the molten material between the two isolation members 300;

[0094] The substrate 110 is tilted to change the thickness of the molten material in different regions, so that after the molten material solidifies, an inclined portion 140 is formed in which the second surface is tilted relative to the first surface.

[0095] Exemplarily, the material of the spacer 300 may be photoresist, and the spacer 300 may be prepared by the same method as the pixel definition layer. After the spacer 300 is formed, the pixel flat layer 130 may be tilted together with the substrate 110 by tilting the substrate 110, and then the inclined portion 140 may be formed by a method of inkjet printing followed by curing. At this time, the material of the inclined portion 140 may be a soluble material, such as polyethylene glycol (PEG), and the solvent may be dimethyl sulfoxide (DMSO), or other materials. Alternatively, after the spacer 300 is formed, the inclined portion 140 may be formed by a conventional photolithography process, and at this time, the material of the inclined portion 140 may be photoresist. In the photolithography process, the photoresist may flow by tilting the substrate 110 to form a tilt angle, so that the inclined portion 140 may be formed after the photoresist is cured.

[0096] Other structures of the array substrate 100, the display panel 200, the display device and the method for manufacturing the array substrate 100 in the above-mentioned embodiment may adopt various technical solutions known to ordinary technicians in the field now and in the future, and will not be described in detail here.

[0097] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0098] In addition, 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0099] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0100] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0101] The disclosure above provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numerals and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0102] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An array substrate, characterized in that: include: substrate; A thin film transistor layer is disposed on a surface of one side of the substrate; A pixel planarization layer is disposed on a surface of the thin film transistor layer that is away from the substrate; At least one inclined portion, in the direction along the substrate toward the pixel flat layer, two side surfaces of the inclined portion are respectively a first surface and a second surface, the first surface is in contact with a surface of the pixel flat layer that is away from the substrate, the second surface is inclined relative to the first surface, and the angle between the second surface and the first surface is α, wherein 5°≤α≤15°.

2. The array substrate according to claim 1, characterized in that: One end of the second surface is connected to the first surface, and the other end of the second surface is inclined and extends away from the first surface; or Both ends of the second surface are spaced apart from the first surface, and the distances between the two ends of the second surface and the first surface are different.

3. A display panel, characterized in that: include: An array substrate, wherein the array substrate is the array substrate according to claim 1 or 2; The light emitting device is arranged on the surface of the pixel flat layer and the inclined portion on a side away from the substrate.

4. The display panel according to claim 3, characterized in that: The light-emitting device includes a plurality of pixel units, each of the pixel units includes at least one first color sub-pixel, at least one second color sub-pixel and at least one third color sub-pixel of different colors, the number of the first color sub-pixels is greater than the number of the second color sub-pixels, and the number of the first color sub-pixels is greater than the number of the third color sub-pixels, wherein the first color sub-pixels are arranged on the second surface of the inclined portion, and the second color sub-pixels and the third color sub-pixels are arranged on the surface of the pixel flat layer on the side away from the substrate.

5. The display panel according to claim 4, characterized in that: The multiple pixel units include at least one first pixel unit, the first pixel unit includes two first color sub-pixels, and the inclined portions corresponding to the two first color sub-pixels of the first pixel unit are respectively a first inclined portion and a second inclined portion, wherein the second surface of the first inclined portion is symmetrical with the second surface of the second inclined portion about a first symmetry plane, and the first symmetry plane is perpendicular to the substrate.

6. The display panel according to claim 5, characterized in that: The multiple pixel units also include at least one second pixel unit, the second pixel unit includes two of the first color sub-pixels, and the inclined portions corresponding to the two of the first color sub-pixels of the second pixel unit are respectively a third inclined portion and a fourth inclined portion, wherein the second surface of the third inclined portion is symmetrical with the second surface of the fourth inclined portion about a second symmetry plane, the second symmetry plane is perpendicular to the substrate, and the second symmetry plane is not parallel to the first symmetry plane.

7. The display panel according to claim 6, characterized in that: At least one of the first pixel units is adjacent to at least one of the second pixel units, and the first symmetry plane is perpendicular to the second symmetry plane.

8. The display panel according to any one of claims 4 to 7, characterized in that: The first color sub-pixel is a green sub-pixel, the second color sub-pixel is a blue sub-pixel, and the third color sub-pixel is a red sub-pixel.

9. The display panel according to any one of claims 4 to 7, characterized in that: Each sub-pixel includes a first electrode, an organic light-emitting layer, and a second electrode. The first electrode is arranged on a side surface of the pixel flat layer facing away from the substrate or the second surface of the inclined portion, the organic light-emitting layer is arranged on a side surface of the first electrode facing away from the substrate, and the second electrode is arranged on a side surface of the organic light-emitting layer facing away from the substrate. The organic light-emitting layer emits light under the action of the electric field of the first electrode and the second electrode.

10. A display device, characterized in that: Comprising a display panel according to any one of claims 3-9.

11. A method for preparing an array substrate, characterized in that: include: forming a substrate; forming a thin film transistor layer on a surface of one side of the substrate; forming a pixel planarization layer on a surface of the thin film transistor layer on a side away from the substrate; At least one inclined portion is formed, and the two side surfaces of the inclined portion in the direction away from the substrate are respectively a first surface and a second surface, the first surface is in contact with a side surface of the pixel flat layer away from the substrate, the second surface is inclined relative to the first surface, and the angle between the second surface and the first surface is α, wherein 5°≤α≤15°.

12. The method for preparing an array substrate according to claim 11, characterized in that: Forming at least one inclined portion, comprising: Performing evaporation deposition on a surface of the pixel flat layer that is away from the substrate; The thickness of the coating layer in different areas is changed by controlling the size of the mesh opening, so that the coating layer forms an inclined portion where the second surface is inclined relative to the first surface.

13. The method for preparing an array substrate according to claim 11, characterized in that: Forming at least one inclined portion, comprising: Forming two spacers spaced apart from each other on a surface of the pixel flat layer that is away from the substrate; placing a molten material between the two spacers; The substrate is tilted to change the thickness of the molten material in different regions, so that after the molten material is solidified, an inclined portion is formed in which the second surface is inclined relative to the first surface.

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