Display panel, preparation method thereof and display device

Abstract

The display panel comprises a substrate, an insulating layer, pixel units and a shading layer, the insulating layer is arranged on one side of the substrate, a plurality of openings are formed in the side, opposite to the substrate, of the insulating layer, and each pixel unit comprises an anode, a reflecting layer, a light-emitting functional layer and a pixel defining layer; the anode covers the bottom wall of the opening; the light-emitting functional layer is located in the opening and arranged on the side, back to the substrate, of the anode. The pixel defining layer is arranged on the side, back to the substrate, of the insulating layer, and at least part of the pixel defining layer covers the side, back to the substrate, of the reflecting layer; the pixel defining layers of two adjacent pixel units are arranged at intervals to define a gap; at least part of the shading layer is located in the gap. Through the arrangement of the light shielding layer, the light escaping along the pixel defining layer in the pixel unit can be absorbed, and the condition that the light subjected to diffuse reflection irradiates other devices to cause misoperation of the other devices is prevented, so that the device reliability of the other devices is ensured.

Description

Technical Field

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

[0002] Display devices have a wide range of application scenarios in life, such as mobile phones, tablet computers and other electronic devices. Display panels are an important component of display devices.

[0003] In the related art, the display panel includes a substrate, an insulating layer and a plurality of pixel units, each of which includes an anode, a reflective layer, a light-emitting functional layer and a pixel defining layer. The insulating layer is arranged on one side of the substrate, and a plurality of openings are arranged on the side of the insulating layer facing away from the substrate. The plurality of pixel units correspond to the plurality of openings one by one, and the pixel defining layers of two adjacent pixel units are connected, that is, the pixel defining layers of two adjacent pixel units are arranged in the same layer, so that part of the light emitted by the light-emitting functional layer of the pixel unit is transmitted laterally along the pixel defining layer in a waveguide mode, and part of the light escaping through the pixel defining layer forms diffuse reflection, thereby affecting the overall image quality and the stability of the thin film transistor device. Summary of the invention

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

[0005] As one aspect of an embodiment of the present application, an embodiment of the present application provides a display panel, which includes:

[0006] substrate;

[0007] An insulating layer is arranged on one side of the substrate, and a plurality of openings are arranged on a side of the insulating layer facing away from the substrate;

[0008] A plurality of pixel units correspond to the plurality of openings one by one, each pixel unit comprises an anode, a reflective layer, a light-emitting functional layer and a pixel defining layer; the anode covers the bottom wall of the opening; at least a portion of the reflective layer covers the inner side wall of the opening; the light-emitting functional layer is located in the opening and is arranged on the side of the anode facing away from the substrate; the pixel defining layer is arranged on the side of the insulating layer facing away from the substrate, and at least a portion of the pixel defining layer covers the side of the reflective layer facing away from the substrate; wherein the pixel defining layers of two adjacent pixel units are arranged at intervals to define a gap;

[0009] The light shielding layer is arranged on the side of the insulating layer facing away from the substrate, and at least a part of the light shielding layer is located in the gap.

[0010] In some embodiments, the insulating layer includes:

[0011] A first planarization layer is disposed on one side of the substrate;

[0012] The second planarization layer is arranged on a side of the first planarization layer that is away from the substrate, and the opening is arranged in the second planarization layer.

[0013] In some embodiments, the light shielding layer includes a black light shielding block.

[0014] In some embodiments, the black light shielding block is made of a black organic material.

[0015] In some embodiments, at least a portion of the light shielding layer covers the surfaces of two adjacent pixel defining layers that are opposite to the substrate.

[0016] In some embodiments, the orthographic projection of the light shielding layer on the substrate is a first projection, the orthographic projection of the pixel defining layer on the substrate is a second projection, and the first projection and the second projection at least partially overlap.

[0017] In some embodiments, the orthographic projection of the reflective layer on the substrate is a third projection, and the first projection and the third projection are arranged at an interval.

[0018] In some embodiments, the anode and the reflective layer are disposed in the same layer.

[0019] As another aspect of the embodiments of the present application, the present application also provides a method for preparing a display panel, which is used to prepare the above display panel, and the method includes:

[0020] providing a substrate;

[0021] forming an insulating layer on the substrate;

[0022] forming a plurality of openings on a side of the insulating layer facing away from the substrate;

[0023] A plurality of pixel units are formed on the insulating layer, the plurality of pixel units correspond to the plurality of openings one by one, and each pixel unit comprises: an anode, a reflective layer, a light-emitting functional layer and a pixel defining layer; the anode covers the bottom surface of the opening, the reflective layer covers the side surface of the opening and the side surface of the insulating layer facing away from the substrate; the light-emitting functional layer is arranged on the side of the reflective layer facing away from the substrate and is located in the opening; the pixel defining layer covers the side surface of the reflective layer and the side surface of the insulating layer facing away from the substrate;

[0024] A light shielding layer is formed between the pixel defining layers of two adjacent pixel units.

[0025] As another aspect of the embodiments of the present application, the present application also provides a display device, which includes the display panel as above or the display panel prepared by the method as above.

[0026] The embodiments of the present application have the following beneficial effects:

[0027] The present application arranges a plurality of pixel units at intervals on the substrate, a portion of the light emitted by the light-emitting functional layer in the pixel unit is absorbed by the organic material of the pixel definition layer, and a portion of the light emitted by the light-emitting functional layer is transmitted laterally along the pixel definition layer in a waveguide mode. In order to solve the problem of diffuse reflection caused by the light transmitted laterally in the pixel definition layer, the present application embodiment defines a gap between two adjacent pixel units, the gap is located on the side of the insulating layer facing away from the substrate, and a light shielding layer is arranged on the side of the insulating layer facing away from the substrate, the light shielding layer at least partially extends into the gap, so that the light shielding layer can absorb the light escaping along the pixel definition layer in the pixel unit, prevent the light escaping from the pixel definition layer from forming diffuse reflection, thereby affecting the overall image quality and affecting the stability of the thin film transistor device, and the setting of a light shielding layer can realize the absorption of light of two adjacent pixel units. Secondly, the present application can absorb the light escaping along the pixel definition layer in the pixel unit through the setting of the light shielding layer, prevent the light reflected by diffuse reflection from irradiating other devices and causing malfunction of other devices, thereby ensuring the device reliability of other devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] Figure 1 A schematic diagram showing the structure of a display panel in the related art is shown;

[0030] Figure 2 A schematic diagram showing the structure of a display panel in the related art is shown;

[0031] Figure 3 A schematic diagram showing the structure of a display panel according to an embodiment of the present application is shown;

[0032] Figure 4 A schematic diagram showing the structure of a display panel according to an embodiment of the present application is shown;

[0033] Figure 5 The curve relationship between stress time and threshold voltage of the display panel in the related art and the display panel of the present application in the negative bias temperature instability light deterioration experiment is shown;

[0034] Figure 6 A schematic flow chart of a method for manufacturing a display panel of the present application is shown.

[0035] Description of reference numerals:

[0036] Related technologies:

[0037] 1', display panel;

[0038] 10', substrate;

[0039] 20', insulation layer;

[0040] 30', pixel unit; 31', anode; 32', reflective layer; 33', light-emitting functional layer; 34', pixel definition layer;

[0041] This application:

[0042] 1. Display panel;

[0043] 10. Substrate;

[0044] 20. Insulating layer; 21. First planarization layer; 22. Second planarization layer; 221. Opening;

[0045] 30. pixel unit; 31. anode; 32. reflective layer; 33. light-emitting functional layer; 34. pixel defining layer;

[0046] 40. Shading layer. DETAILED DESCRIPTION

[0047] 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.

[0048] Figure 1 A schematic diagram showing the structure of a display panel 1' in the related art is shown. Figure 2 The schematic diagram of the structure of the display panel 1' in the related art is shown. In the related art, the display panel 1' includes a substrate 10', an insulating layer 20' and a plurality of pixel units 30', each pixel unit 30' includes an anode 31', a reflective layer 32', a light-emitting functional layer 33' and a pixel defining layer 34'. The insulating layer 20' is arranged on one side of the substrate 10', and a plurality of openings are arranged on the side of the insulating layer 20' facing away from the substrate 10'. The plurality of pixel units 30' correspond to the plurality of openings one by one, and the pixel defining layers 34' of two adjacent pixel units 30' are connected, that is, the pixel defining layers 34' of two adjacent pixel units 30' are arranged in the same layer, so that a part of the light emitted by the light-emitting functional layer 33' of the pixel unit 30' is transmitted laterally along the pixel defining layer 34' in a waveguide mode, and a part of the light escaping through the pixel defining layer 34' forms diffuse reflection in the display panel, thereby affecting the overall image quality and the stability of the thin film transistor device.

[0049] Figure 3 FIG. 1 is a schematic diagram showing the structure of a display panel 1 according to an embodiment of the present application. Figure 4A schematic diagram showing the structure of a display panel 1 according to an embodiment of the present application is shown in FIG. Figure 3 and Figure 4 The embodiment of the present application provides a display panel 1, which includes: a substrate 10, an insulating layer 20, a light shielding layer 40 and a plurality of pixel units 30. The display panel 1 provided in the embodiment of the present application can absorb the light escaping along the pixel defining layer 34 in the pixel unit 30 through the setting of the light shielding layer 40, prevent the diffusely reflected light from irradiating other devices and causing malfunction of other devices, thereby ensuring the reliability of other devices.

[0050] See also Figure 3 and Figure 4 , the insulating layer 20 is arranged on one side of the substrate 10, and a plurality of openings 221 are arranged on the side of the insulating layer 20 facing away from the substrate 10, and a plurality of pixel units 30 correspond to the plurality of openings 221 one by one. Each pixel unit 30 includes an anode 31, a reflective layer 32, a light-emitting functional layer 33 and a pixel defining layer 34, and the anode 31 covers the bottom wall of the opening 221. At least part of the reflective layer 32 covers the inner side wall of the opening 221. The light-emitting functional layer 33 is located in the opening 221 and is arranged on the side of the anode 31 facing away from the substrate 10, and the light-emitting functional layer 33 is used to emit light to form an image. The light-emitting functional layers 33 of different pixel units 30 can emit light of the same color or different colors. The plurality of pixel units 30 can include a plurality of sub-pixels, such as a red sub-pixel R, a blue pixel B and a green pixel G. The plurality of sub-pixels can also include sub-pixels of other colors, which are not specifically limited here.

[0051] See also Figure 3 and Figure 4 The anode 31, the reflective layer 32, the light-emitting functional layer 33 and the pixel defining layer 34 cooperate to form a reflective cup structure. The reflective layer 32 can reflect light. The light emitted by the light-emitting functional layer 33 is reflected by the reflective cup structure to emit light, thereby realizing the display image on the back of the display panel 1. It should be noted that the anode 31 and the reflective layer 32 of the present application are arranged in the same layer, and the anode 31 and the light-emitting functional layer 33 are arranged in a stacked manner.

[0052] See also Figure 3 and Figure 4 The pixel defining layer 34 is disposed on the side of the insulating layer 20 facing away from the substrate 10, and at least a portion of the pixel defining layer 34 covers the side of the reflective layer 32 facing away from the substrate 10. The pixel defining layers 34 of two adjacent pixel units 30 are spaced apart to define a gap.

[0053] See also Figure 3 and Figure 4 The light shielding layer 40 is disposed on the side of the insulating layer 20 facing away from the substrate 10 , and at least a portion of the light shielding layer 40 is located in the gap.

[0054] According to the display panel 1 provided in the embodiment of the present application, the present application arranges a plurality of pixel units 30 at intervals on the substrate 10, a portion of the light emitted by the light-emitting functional layer 33 in the pixel unit 30 is absorbed by the organic material of the pixel definition layer, and a portion of the light emitted by the light-emitting functional layer 33 is transmitted laterally along the pixel definition layer 34 in a waveguide mode. In order to solve the problem of diffuse reflection caused by the light transmitted laterally in the pixel definition layer 34, the embodiment of the present application defines a gap between two adjacent pixel units 30, and the gap is located on the side of the insulating layer 20 facing away from the substrate 10, and a light-shielding layer 40 is arranged on the side of the insulating layer 20 facing away from the substrate 10, and the light-shielding layer 40 at least partially extends into the gap, so that the light-shielding layer 40 can absorb the light escaping along the pixel definition layer 34 in the pixel unit 30, and prevent the light escaping from the pixel definition layer 34 from forming diffuse reflection, thereby affecting the overall image quality and affecting the stability of the thin film transistor device, and the setting of a light-shielding layer 40 can realize the absorption of light from two adjacent pixel units 30. Secondly, the present application can absorb the light escaping along the pixel defining layer 34 in the pixel unit 30 through the provision of the light shielding layer 40, and prevent the diffusely reflected light from irradiating other devices and causing malfunction of other devices, thereby ensuring the device reliability of other devices.

[0055] See also Figure 5 , Figure 5 The curve relationship between the stress time and the threshold voltage of the display panel 1 in the related art and the display panel 1 of the present application in the negative bias temperature instability (NBTI) light degradation experiment is shown, wherein, from 0s to 20000s, the threshold voltage of the display panel 1 of the present application drifts between 0v and 1v, while the threshold voltage of the display panel 1 in the related art undergoes a more serious negative shift, changing from 1v to -8v. It can be seen that, compared with the display panel 1 in the related art, the present application can absorb the light escaping along the pixel defining layer 34 in the pixel unit 30 through the setting of the shading layer 40, and prevent the diffusely reflected light from irradiating other devices and causing malfunction of other devices, thereby reducing the drift of the threshold voltage of the display panel 1 of the present application in the negative bias temperature instability (NBTI) light degradation experiment, thereby ensuring the reliability of other devices.

[0056] Exemplarily, the present application can prevent diffusely reflected light from irradiating the active layer and thus affecting the malfunction of the thin film transistor, thereby effectively ensuring the reliability of the thin film transistor.

[0057] See also Figure 3 and Figure 4In some embodiments, the insulating layer 20 includes: a first planarization layer 21 and a second planarization layer 22, the first planarization layer 21 is arranged on one side of the substrate 10, the second planarization layer 22 is arranged on the side of the first planarization layer 21 facing away from the substrate 10, and an opening 221 is arranged in the second planarization layer 22, so that a portion of the first planarization layer 21 is exposed in the opening 221, and then the portion of the first planarization layer 21 forms the bottom of the reflective cup structure, and the side wall of the opening 221 forms the cup wall of the reflective cup structure.

[0058] See also Figure 3 and Figure 4 In some embodiments, the shading layer 40 includes a black shading block. With this configuration, the shading layer 40 can better avoid the situation where light from the pixel defining layers 34 of two adjacent pixel units 30 interfere with each other, and at the same time can better absorb the light escaping along the pixel defining layer 34 in the pixel unit 30 to achieve a better shading effect.

[0059] Exemplarily, the black shading block includes an organic black pigment, which is at least one of aniline black, carbon black or perylene black. The organic black pigment is formed on the black shading block by spraying, and the black aniline black, carbon black, perylene black or perylene black has a good light absorption effect, which can better absorb the light escaping from the pixel unit 30 along the pixel defining layer 34 to achieve a better shading effect.

[0060] See also Figure 3 and Figure 4 In some embodiments, at least part of the structure of the light shielding layer 40 is covered on the surface of the side of two adjacent pixel defining layers 34 facing away from the substrate 10, so that the light shielding layer 40 can cover two opposite edges of the two adjacent pixel defining layers 34. Since the diffuse reflection of light near the edge of the pixel defining layer 34 is more serious, the embodiment of the present application directly covers the two opposite edges of the two adjacent pixel defining layers 34 through the light shielding layer 40. Such a configuration can directly absorb the light diffusely reflected by the edge of the pixel defining layer 34, thereby better absorbing the light escaping along the pixel defining layer 34 in the pixel unit 30, so as to achieve a better light shielding effect.

[0061] Exemplarily, two adjacent pixel units 30 are respectively the first sub-pixel unit 30 and the second sub-pixel unit 30, the pixel defining layer 34 of the first sub-pixel unit 30 has a first edge adjacent to the second sub-pixel unit 30, the pixel defining layer 34 of the second sub-pixel unit 30 has a second edge adjacent to the first sub-pixel unit 30, a portion of the light-shielding layer 40 covers a surface of the pixel defining layer 34 of the first sub-pixel unit 30 facing away from the substrate 10, and a portion of the light-shielding layer 40 covers a surface of the pixel defining layer 34 of the second sub-pixel unit 30 facing away from the substrate 10, so that the light-shielding layer 40 completely covers the first edge and the second edge, so that the light-shielding layer 40 can directly absorb the light diffusely reflected from the edge of the pixel defining layer 34.

[0062] In some embodiments, the orthographic projection of the light shielding layer 40 on the substrate 10 is a first projection, and the orthographic projection of the pixel defining layer 34 on the substrate 10 is a second projection. The first projection and the second projection at least partially overlap.

[0063] In some embodiments, since the light shielding layer 40 is disposed between the pixel defining layers 34 of two adjacent pixel units 30 , most of the light transmitted laterally through the pixel defining layer 34 will leak out along the edge of the pixel defining layer 34 , but part of the light will also leak out from the side of the pixel defining layer 34 facing away from the substrate 10 .

[0064] In order to solve the above problem, the height of the light shading layer 40 on the second planarization layer 22 is greater than the height of the pixel defining layer 34 on the second planarization layer 22, so that a part of the light shading layer 40 protrudes from the surface of the pixel defining layer 34 on the side facing away from the substrate 10, so that the light leaking from the side of the pixel defining layer 34 on the side facing away from the substrate 10 can be absorbed by the part of the structure of the light shading layer 40 protruding from the pixel defining layer 34, and most of the light leaking from the edge and side of the pixel defining layer 34 will be absorbed by the light shading layer 40, so as to achieve a better light shading effect.

[0065] In some embodiments, the orthographic projection of the reflective layer 32 on the substrate 10 is a third projection, and the first projection and the third projection are arranged at intervals. Such an arrangement enables the reflective layer 32 and the light-shielding block to be arranged at intervals, so that the light reflected by the reflective layer 32 will not be blocked by the light-shielding layer 40, thereby preventing the light reflected by the reflective layer 32 from being absorbed by the light-shielding block, thereby improving the reflection efficiency of the reflective layer 32 and thereby improving the light output efficiency of the display panel 1.

[0066] In some embodiments, the anode 31 and the reflective layer 32 are disposed in the same layer.

[0067] The structure of the display panel 1 disclosed in the embodiment of the present application is explained below by an example of the preparation process of the display panel 1. The "patterning process" mentioned in the present disclosure includes processes such as depositing a film layer, coating a photoresist, mask exposure, development, etching and stripping the photoresist. Deposition can be performed by any one or more selected from sputtering, evaporation and chemical vapor deposition, coating can be performed by any one or more selected from spraying and spin coating, and etching can be performed by any one or more selected from dry etching and wet etching. "Thin film" refers to a thin film made of a certain material on a substrate using a deposition or coating process. If the "thin film" does not require a patterning process during the entire production process, the "thin film" can also be called a "layer". When the "thin film" still requires a patterning process during the entire production process, it is called a "thin film" before the patterning process and a "layer" after the patterning process. The "layer" after the patterning process contains at least one "pattern". The "A and B are arranged in the same layer" mentioned in the present disclosure means that A and B are formed simultaneously by the same patterning process. “The orthographic projection of A includes the orthographic projection of B” means that the orthographic projection of B falls within the range of the orthographic projection of A, or the orthographic projection of A covers the orthographic projection of B.

[0068] Figure 6 A schematic diagram of a method for preparing a display panel of the present application is shown. In an exemplary embodiment, see Figure 6 , the preparation process of the display panel 1 may include the following steps.

[0069] S1. Provide a substrate 10.

[0070] S2 . Form an insulating layer 20 on the substrate 10 .

[0071] S3. Form a plurality of openings 221 on a side of the insulating layer 20 facing away from the substrate 10 .

[0072] S4. A plurality of pixel units 30 are formed on the insulating layer 20, and the plurality of pixel units 30 correspond to the plurality of openings 221 one by one. Each pixel unit 30 includes: an anode 31, a reflective layer 32, a light-emitting functional layer 33, and a pixel defining layer 34. The anode 31 covers the bottom surface of the opening 221, and the reflective layer 32 covers the side surface of the opening 221 and the side surface of the insulating layer 20 facing away from the substrate 10. The light-emitting functional layer 33 is arranged on the side of the reflective layer 32 facing away from the substrate 10, and is located in the opening 221. The pixel defining layer 34 covers the side surface of the reflective layer 32 and the side surface of the insulating layer 20 facing away from the substrate 10.

[0073] S5 . Form a light shielding layer 40 between the pixel defining layers 34 of two adjacent pixel units 30 .

[0074] As another aspect of the embodiment of the present disclosure, the embodiment of the present disclosure provides a display device, which includes the above display panel 1. Therefore, the display device has all the features and advantages of the above double-sided display module 1, which will not be repeated here. In general, the display panel 1 of the display device is formed by arranging a plurality of pixel units 30 at intervals on a substrate 10, a portion of the light emitted by the light-emitting functional layer 33 in the pixel unit 30 is absorbed by the organic material of the pixel definition layer, and a portion of the light emitted by the light-emitting functional layer 33 is transmitted laterally along the pixel definition layer 34 in a waveguide mode. In order to solve the problem of diffuse reflection caused by the light transmitted laterally in the pixel definition layer 34, the embodiment of the present application defines a gap between two adjacent pixel units 30, and the gap is located on the side of the insulating layer 20 facing away from the substrate 10, and a light-shielding layer 40 is arranged on the side of the insulating layer 20 facing away from the substrate 10, and the light-shielding layer 40 at least partially extends into the gap, so that the light-shielding layer 40 can absorb the light escaping along the pixel definition layer 34 in the pixel unit 30, and prevent the light escaping from the pixel definition layer 34 from forming diffuse reflection, thereby affecting the overall image quality and affecting the stability of the thin film transistor device, and the setting of a light-shielding layer 40 can realize the absorption of light from two adjacent pixel units 30. Secondly, the present application can absorb the light escaping along the pixel defining layer 34 in the pixel unit 30 through the provision of the light shielding layer 40, and prevent the diffusely reflected light from irradiating other devices and causing malfunction of other devices, thereby ensuring the device reliability of other devices.

[0075] 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.

[0076] 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0077] 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.

[0078] 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 below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0079] 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.

[0080] 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. A display panel, characterized in that: include: substrate; An insulating layer is disposed on one side of the substrate, and a plurality of openings are disposed on a side of the insulating layer facing away from the substrate; A plurality of pixel units corresponding to the plurality of openings one by one, each of the pixel units comprising an anode, a reflective layer, a light-emitting functional layer and a pixel defining layer; The anode covers the bottom wall of the opening; at least part of the reflective layer covers the inner side wall of the opening; the light-emitting functional layer is located in the opening and is arranged on the side of the anode facing away from the substrate; the pixel defining layer is arranged on the side of the insulating layer facing away from the substrate, and at least part of the pixel defining layer covers the side of the reflective layer facing away from the substrate; wherein the pixel defining layers of two adjacent pixel units are arranged at intervals to define a gap; The light shielding layer is arranged on a side of the insulating layer facing away from the substrate, and at least a part of the light shielding layer is located in the gap.

2. The display panel according to claim 1, characterized in that: The insulating layer comprises: A first planarization layer is disposed on one side of the substrate; The second planarization layer is arranged on a side of the first planarization layer facing away from the substrate, and the opening is arranged in the second planarization layer.

3. The display panel according to claim 1, characterized in that: The light shielding layer includes a black light shielding block.

4. The display panel according to claim 3, characterized in that: The black light shielding block is made of black organic material.

5. The display panel according to claim 1, characterized in that: At least a portion of the structure of the light shielding layer covers the surfaces of two adjacent pixel defining layers which are opposite to the substrate.

6. The display panel according to claim 1, characterized in that: The orthographic projection of the light shielding layer on the substrate is a first projection, and the orthographic projection of the pixel defining layer on the substrate is a second projection. The first projection and the second projection at least partially overlap.

7. The display panel according to claim 6, characterized in that: The orthographic projection of the reflective layer on the substrate is a third projection, and the first projection and the third projection are arranged at an interval.

8. The display panel according to claim 1, characterized in that: The anode and the reflective layer are arranged in the same layer.

9. A method for preparing a display panel, characterized in that: For preparing the display panel according to any one of claims 1 to 7, the method comprises: providing a substrate; forming an insulating layer on the substrate; forming a plurality of openings on a side of the insulating layer facing away from the substrate; A plurality of pixel units are formed on the insulating layer, the plurality of pixel units correspond to the plurality of openings one by one, and each of the pixel units comprises: an anode, a reflective layer, a light-emitting functional layer and a pixel defining layer; the anode covers the bottom surface of the opening, the reflective layer covers the side surface of the opening and the side surface of the insulating layer facing away from the substrate; the light-emitting functional layer is arranged on the side of the reflective layer facing away from the substrate and is located in the opening; the pixel defining layer covers the side surface of the reflective layer and the side surface of the insulating layer facing away from the substrate; A light shielding layer is formed between the pixel defining layers of two adjacent pixel units.

10. A display device, characterized in that: The invention comprises a display panel as described in any one of claims 1 to 8 or a display panel prepared by the method as described in claim 9.

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