Display panel, manufacturing method thereof, and display device

Abstract

This application relates to a display panel and its manufacturing method and display device. The display panel includes: a substrate, including an electrode layer with electrodes disposed thereon; a light-shielding layer having a first opening, with each electrode disposed opposite to one of the first openings; a light-emitting layer including a pixel defining layer having a second opening, with each second opening disposed opposite to one of the first openings; and a black matrix layer having a third opening, with each third opening disposed opposite to one of the second openings. Along the thickness direction, the orthographic projections of the first, second, and third openings onto the substrate respectively constitute a first orthographic projection, a second orthographic projection, and a third orthographic projection. The first orthographic projection is located within the third orthographic projection, and the second orthographic projection is located within the first orthographic projection, so that the reflection diffraction pattern of the display panel in the non-display state is approximately circular. The display panel provided by the embodiments of this application can improve the reflection diffraction pattern of the display panel in the screen-off state while reducing the reflectivity to ambient light.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel, its manufacturing method, and a display device. Background Technology

[0002] With the development of display technology, users have increasingly higher requirements for the performance of display panels in various aspects, not only in terms of display performance but also in terms of appearance when the screen is off. The appearance of a display panel when the screen is off is closely related to the reflection and diffraction pattern formed by the display panel under ambient light. Since the pixel apertures of existing display panels are usually square, when the display panel is illuminated by external light sources or ambient light in the off state, the reflection and diffraction pattern it presents is approximately cross-shaped, resulting in a poor overall visual effect.

[0003] Therefore, there is an urgent need for a display panel and a corresponding display device that can improve the uneven reflection and diffraction patterns of ambient light at the openings of each pixel and the poor screen-off effect. Summary of the Invention

[0004] This application provides a display panel and its manufacturing method, as well as a display device, wherein the display panel can improve the reflection and diffraction effect when the screen is off.

[0005] In a first aspect, an embodiment of this application provides a display panel, comprising: a substrate, including an electrode layer, the electrode layer including a plurality of electrodes spaced apart; a light-shielding layer disposed on the substrate, the light-shielding layer having a plurality of first openings, each electrode being disposed opposite to one of the first openings and exposed in the first opening; a light-emitting layer disposed on the side of the light-shielding layer away from the substrate, the light-emitting layer including a pixel defining layer having a plurality of second openings and light-emitting units disposed within the second openings, each second opening being disposed opposite to one of the first openings, the light-emitting unit being electrically connected to the electrode; and a black matrix layer disposed on the side of the light-emitting layer away from the light-shielding layer, the black matrix layer having a plurality of third openings, each third opening being disposed opposite to one of the second openings; wherein, along the thickness direction, the orthographic projection of the first opening on the substrate constitutes a first orthographic projection, the orthographic projection of the second opening on the substrate constitutes a second orthographic projection, the orthographic projection of the third opening on the substrate constitutes a third orthographic projection, the first orthographic projection is located inside the third orthographic projection, and the second orthographic projection is located inside the first orthographic projection, so that the reflection diffraction pattern of the display panel in the non-display state is circular.

[0006] According to one aspect of the embodiments of this application, the first orthographic projection and the third orthographic projection are at least partially connected.

[0007] According to one aspect of the embodiments of this application, the sidewall that encloses the first opening includes multiple wall segments connected end to end in sequence, the wall segments are arc-shaped and the adjacent wall segments are smoothly connected; or, the wall segments are planes and the included angle between adjacent wall segments is greater than or equal to 157.5°.

[0008] According to one aspect of the embodiments of this application, the first opening is characterized in that: the first opening is a circular opening; or, the first opening is an elliptical opening, wherein the difference in length between the major axis and the minor axis of the ellipse is less than or equal to 20% of the major axis; or, the first opening is a regular N-gonal opening, wherein N≥16.

[0009] According to one aspect of the embodiments of this application, the second opening and the third opening have the same shape, and the geometric centers of the second orthographic projection and the third orthographic projection coincide, and the edges of the second orthographic projection and the corresponding edges of the third orthographic projection are arranged parallel to each other.

[0010] According to one aspect of the embodiments of this application, both the second opening and the third opening are rectangular.

[0011] According to one aspect of the embodiments of this application, the pixel defining layer covers the light-shielding layer and partially fills the first opening.

[0012] According to one aspect of the embodiments of this application, the area of ​​the electrode is greater than or equal to the area of ​​the third opening, and the third orthographic projection is located within the outline of the electrode.

[0013] According to one aspect of the embodiments of this application, the light-shielding layer includes a resin doped with at least one of black dye and toner.

[0014] According to one aspect of the embodiments of this application, the thickness of the light-shielding layer is greater than or equal to 1 μm.

[0015] Secondly, according to embodiments of this application, a method for manufacturing a display panel is proposed, comprising: providing a substrate, the substrate including an electrode layer, the electrode layer including a plurality of electrodes spaced apart; preparing a light-shielding layer on one side surface of the substrate and patterning a plurality of first openings, each first opening corresponding to one of the electrodes; preparing a pixel defining layer on the side of the light-shielding layer away from the substrate, the pixel defining layer at least partially filling the first openings and patterning a plurality of second openings, each second opening being surrounded by one of the first openings; preparing light-emitting units in the second openings and electrically connecting the light-emitting units to the electrodes; preparing a black matrix layer on the side of the pixel defining layer away from the light-shielding layer and patterning a plurality of third openings, such that the orthographic projection of each third opening on the substrate covers the orthographic projection of one of the first openings on the substrate.

[0016] Thirdly, according to embodiments of this application, a display device is provided, including the display panel in any embodiment of the first aspect.

[0017] In the display panel provided in this embodiment, a substrate, a light-shielding layer, a light-emitting layer, and a black matrix layer are stacked sequentially. The light-shielding layer has multiple first openings, the pixel-defining layer in the light-emitting layer has multiple second openings, and the black matrix layer has multiple third openings. The orthographic projection of the first opening onto the substrate lies within the orthographic projection of the third opening onto the substrate, and the orthographic projection of the second opening onto the substrate lies within the orthographic projection of the first opening onto the substrate. That is, the display panel provided in this embodiment has a light-shielding layer whose orthographic projection of its opening lies between the orthographic projection of the opening in the black matrix layer and the orthographic projection of the second opening (which serves as a pixel opening). This allows for adjustment of the shape and size of the first opening, without affecting the pixel openings, to adjust the reflection and diffraction pattern of the display panel in the off-screen state and reduce the reflectivity to external light, thereby effectively improving the off-screen effect of the display panel. Attached Figure Description

[0018] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the structure of a display panel provided in one embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the structure of a display panel provided in another embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the orthographic projection structure of the first to third openings in a display panel provided in one embodiment of this application;

[0022] Figure 4 This is a flowchart of a method for manufacturing a display panel according to an embodiment of this application;

[0023] Figure 5 yes Figure 4 A schematic diagram of the structure corresponding to step S2 in the manufacturing method of the display panel shown;

[0024] Figure 6 yes Figure 4 A schematic diagram of the structure corresponding to step S3 in the manufacturing method of the display panel shown;

[0025] Figure 7 yes Figure 4 A schematic diagram of the structure corresponding to step S5 in the manufacturing method of the display panel shown.

[0026] Figure 8 This is a schematic diagram of the structure of a display device provided in one embodiment of this application.

[0027] in:

[0028] 100 - Display panel; 200 - Display device;

[0029] 10 - Substrate; 20 - Light-shielding layer; 30 - Light-emitting layer; 40 - Black matrix layer;

[0030] 11-Electrode layer; 21-First opening; 22-First orthographic projection; 31-Pixel limiting layer; 32-Light-emitting unit; 33-Support pillar; 41-Third opening; 42-Third orthographic projection;

[0031] 111 - Electrode; 311 - Second opening; 312 - Second orthographic projection;

[0032] X - Thickness direction.

[0033] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0034] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0036] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0037] The features and exemplary embodiments of various aspects of this application will now be described in detail. Furthermore, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0038] With the development of display technology, the quality of display panels in the market has gradually improved. Correspondingly, customers have become increasingly strict in their quality requirements for display panels in all aspects. In addition to the display quality requirements during the regular display process, there are also certain requirements for the appearance of the display panel when the screen is off. The visual experience provided to users by the display panel when the screen is off is basically determined by the reflection effect of the display panel on the ambient light. Furthermore, in the process of reflecting incident light from the outside, the reflection diffraction pattern formed is basically determined by the pixel opening area with the highest reflectivity. The shape and size of the pixel opening both affect the reflection diffraction pattern of the display panel.

[0039] Based on this, the inventors discovered that existing display panels typically have polygonal pixel openings, most of which are rectangular. In this case, the reflection diffraction pattern formed by the display panel in the off state is a cross shape with the intersection point located between the pixel openings, resulting in uneven reflection diffraction and poor effect.

[0040] To address the aforementioned issues, this application proposes a display panel in which a light-shielding layer is added between the electrode layer and the pixel defining layer, and a corresponding opening is provided in the light-shielding layer. The size of the opening is located between the pixel opening and the opening of the black matrix layer, and the three types of openings are provided in a corresponding manner. This allows the reflection and diffraction pattern of the display panel to be circular by setting the opening of the light-shielding layer to be circular or close to circular, thereby improving the reflection and diffraction effect while reducing the reflectivity.

[0041] It is understood that the following embodiments of this application are only illustrated by taking a rectangular pixel opening in the display panel as an example, but this application is not limited to this and can also be applied to display panels with other pixel opening shapes and pixel arrangements, and protect them.

[0042] To better understand this application, the following will be combined with... Figures 1 to 7 The manufacturing method of the display module, the display module, and the display device provided in the embodiments of this application will be described in detail.

[0043] Please refer to the following: Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of a display panel provided in one embodiment of this application. Figure 2 This is a schematic diagram of the structure of a display panel provided in another embodiment of this application. Figure 3 This is a schematic diagram of the orthographic projection structure of the first to third openings in a display panel provided in one embodiment of this application onto the substrate.

[0044] In a first aspect, according to an embodiment of this application, a display panel 100 is provided, comprising a substrate 10, a light-shielding layer 20, a light-emitting layer 30, and a black matrix layer 40 arranged sequentially. The substrate 10 includes an electrode layer 11, which includes a plurality of electrodes 111 spaced apart. The light-shielding layer 20 is disposed on one side of the substrate 10 and has a plurality of first openings 21. Each electrode 111 is disposed opposite to one of the first openings 21 and exposed in the first opening 21. The light-emitting layer 30 is disposed on the side of the light-shielding layer 20 away from the substrate 10. The light-emitting layer 30 includes a pixel defining layer 31 having a plurality of second openings 311 and light-emitting units 32 disposed in the second openings 311. Each second opening 311 is disposed opposite to one of the first openings 21, and the light-emitting unit 32 is electrically connected to the electrode 111. The black matrix layer 40 is disposed on the side of the light-emitting layer 30 away from the light-shielding layer 20 and has a plurality of third openings 41. Each third opening 41 is disposed opposite to one of the second openings 311.

[0045] Based on this, along the thickness direction, the orthographic projection of the first opening 21 on the substrate 10 constitutes the first orthographic projection 22, the orthographic projection of the second opening 311 on the substrate 10 constitutes the second orthographic projection 312, and the orthographic projection of the third opening 41 on the substrate 10 constitutes the third orthographic projection 42. The first orthographic projection 22 is located inside the third orthographic projection 42, and the second orthographic projection 312 is located inside the first orthographic projection 22, so that the reflection diffraction pattern of the display panel 100 in the non-display state is circular.

[0046] This application provides a display panel 100, which includes a substrate 10. The substrate 10 may include a multilayer film structure, wherein one of the two outermost film structures may be an electrode layer 11, more specifically, an anode layer. A plurality of electrodes 111 are disposed in the electrode layer 11. The specific placement, shape, and size of the electrodes 111 may be designed according to the required pixel size and the corresponding pixel arrangement, and this application does not impose any specific limitations on this.

[0047] A light-shielding layer 20 is stacked on the surface of the substrate 10 near the electrode layer 11. Similar to the black matrix, the light-shielding layer 20 is made of a material with light-shielding effect. A plurality of first openings 21 are provided in the light-shielding layer 20. These first openings 21 are arranged one-to-one with a plurality of electrodes 111, that is, the orthogonal projection of the first opening 21 on the substrate 10 can be located inside the electrode 111, so that the electrode 111 can be exposed to the outside through the first opening 21.

[0048] A light-emitting layer 30 is stacked on the surface of the light-shielding layer 20 facing away from the substrate 10. The light-emitting layer 30 includes a pixel limiting layer 31 for forming a pixel opening and a light-emitting unit 32 disposed in the pixel opening, i.e., a second opening 311, wherein the second opening 311 is disposed in a one-to-one correspondence with the first opening 21. That is, in this embodiment, the pixel limiting layer 31 forms a smaller second opening 311 inside the first opening 21. At this time, the electrode 111 is also exposed through the second opening 311 and is electrically connected to the light-emitting unit 32 disposed inside the second opening 311 to form the light-emitting element required for display.

[0049] It is understandable that the first opening 21 formed by the light-shielding layer 20 is used to control the shape of the pattern formed when the display panel 100 reflects external light, while the second opening 311 in the pixel limiting layer 31 is used as a pixel opening to limit the specific position and shape of the light-emitting pixels. It can be designed according to the required pixel size and arrangement and is set in correspondence with the electrode 111.

[0050] Optionally, the light-emitting unit 32 in the light-emitting layer 30 may include the required structures such as an organic light-emitting layer and a cathode layer. At the same time, the light-emitting layer 30 may also be provided with conventional structures such as support pillars 33 required in the manufacturing process of the display panel 100.

[0051] Based on this, such as Figure 1 As shown, in this embodiment, the pixel limiting layer 31 can be stacked with the light-shielding layer 20 and substantially cover the light-shielding layer 20. In this case, a portion of the pixel limiting layer 31 extends into the first opening 21 and defines the second opening 311. The support pillar 33 is disposed on the side of the light-shielding layer 20 away from the substrate 10, that is, inside the pixel limiting layer 31. Alternatively, as Figure 2 As shown, in this embodiment of the application, the pixel limiting layer 31 can be disposed only in the first opening 21, and a second opening 311 with a smaller area can be further defined inside the first opening 21. That is, the pixel limiting layer 31 and the light shielding layer 20 can be disposed on the same layer and with the same thickness. At this time, the support column 33 is still disposed on the side of the light shielding layer 20 away from the substrate 10, but it is spaced apart from the pixel limiting layer 31 and disposed on a different layer.

[0052] In summary, the specific settings of the pixel definition layer 31 can be selected according to processing conditions, etc., and this application does not impose any specific limitations on it.

[0053] A black matrix layer 40 is disposed on the side of the light-emitting layer 30 facing away from the light-shielding layer 20 to block the circuit traces and other structures required for the pixels. It is understood that a functional layer 50 can also be disposed between the light-emitting layer 30 and the black matrix layer 40. The functional layer 50 can have different layer structures depending on the functions required by the display panel 100, such as a touch layer and an encapsulation layer. This application does not impose specific limitations on this. In this embodiment, the black matrix layer 40 has multiple third openings 41, which correspond one-to-one with the second openings 311. Furthermore, along the thickness direction X of the display panel, the orthographic projection of the third opening 41 onto the substrate 10 surrounds the orthographic projection of the first opening 21 onto the substrate 10, forming the largest of the three openings mentioned above in this application.

[0054] It is understood that the screen-off reflection diffraction pattern of the display panel 100 provided in this embodiment is circular. The term "circular" means that the reflection diffraction pattern is perfectly circular or approximately circular within a certain allowable error range.

[0055] Based on this, along the thickness direction X, the orthographic projection of the first opening 21 of the light-shielding layer 20 onto the substrate 10 constitutes the first orthographic projection 22, the orthographic projection of the second opening 311 of the pixel limiting layer 31 onto the substrate 10 constitutes the second orthographic projection 312, and the orthographic projection of the third opening 41 of the black matrix layer 40 onto the substrate 10 constitutes the third orthographic projection 42. The third orthographic projection 42 surrounds the first orthographic projection 22, and the first orthographic projection 22 surrounds the second orthographic projection 312. That is, the electrode 111 and the aforementioned three openings are all arranged in a one-to-one correspondence. The orthographic projections of the three openings form a three-layer nested structure, and this nested structure is located inside the electrode 111. In this structure, both the third opening 41 and the first opening 21 are openings in a layer structure with a light-shielding effect. Therefore, when ambient light enters the display panel 100, the shape of the reflected light is determined by the smaller of the two openings, namely the first opening 21. By specifically adjusting the shape of the part of the first opening 21 that is not blocked by the third opening 41 to make it circular or close to circular, the reflection diffraction pattern of the display panel 100 in the screen-off state can also be circular or close to circular, thereby improving the screen-off reflection diffraction effect and improving the overall quality of the display panel 100.

[0056] Furthermore, in this embodiment, the second opening 311 is used as the pixel opening in the display panel 100. The shape of the second opening 311 is not limited and can be set in the first opening 21. Therefore, the screen-off reflection diffraction effect of the display panel 100 can be improved without affecting the shape and arrangement of the pixels themselves, without changing the original optical effect, reducing the impact on the conventional display of the display panel 100, thereby reducing the impact on production costs.

[0057] Furthermore, the first orthographic projection 22 is surrounded by the third orthographic projection 42, that is, the area of ​​the first opening 21 is smaller than the area of ​​the third opening 41. With the first opening 21 set in the light-shielding layer 20, the area covered by the light-shielding layer can be increased, and the reflectivity of the display panel 100 can be further reduced.

[0058] In some alternative embodiments, the first orthographic projection 22 and the third orthographic projection 42 are at least partially connected.

[0059] Along the thickness direction X, in this embodiment, the orthographic projection of the opening of the light-shielding layer 20 onto the substrate 10 constitutes a first orthographic projection 22, and the orthographic projection of the opening of the black matrix layer 40 onto the substrate 10 constitutes a third orthographic projection 42. The first orthographic projection 22 and the third orthographic projection 42 formed by the orthographic projections of the corresponding openings onto the substrate 10 can be connected. Specifically, in this embodiment, the first orthographic projection is circular or nearly circular, and the shape of the third orthographic projection is determined according to the pixel opening, usually a rectangle or other polygon. On this basis, "connected" means that the first orthographic projection 22 and the third orthographic projection 42 are at least partially tangent, so that the first orthographic projection 22 with the largest area can be obtained inside the third orthographic projection 42 with a preset area. This reduces the area or shape limitations of the second opening 311, i.e., the pixel opening, located inside the first opening 21 after the light-shielding layer 20 is set, and avoids adverse effects on the pixel arrangement required for the conventional display of the display panel 100.

[0060] In some alternative embodiments, the sidewall that encloses the first opening 21 comprises multiple wall segments connected end to end in sequence, the wall segments being arc-shaped and smoothly transitioning between adjacent wall segments; or, the wall segments being planar, and the included angle between adjacent wall segments being greater than or equal to 157.5°.

[0061] To ensure that the reflected diffraction pattern formed by the reflected light passing through the first opening 21 is circular or nearly circular, the shape of the sidewalls enclosing the first opening 21 can be adjusted accordingly. Furthermore, the first opening 21 can be formed by multiple sequentially connected wall segments. These wall segments can have a certain curvature and smooth transitions between adjacent wall segments, thus enabling the first orthographic projection 22 to form a circle, ellipse, or other shape with curved edges that approximates a circle.

[0062] Alternatively, the walls that enclose the first opening 21 can be planar and the angle between adjacent walls can be greater than or equal to 157.5°, so that the first orthographic projection 22 forms a polygon with more than a certain number of sides. Under the premise that the size of the angle meets the aforementioned requirements, the first orthographic projection 22 can be a regular polygon with the same wall width, or the first orthographic projection 22 can have multiple walls with different widths.

[0063] In some alternative embodiments, the first opening 21 is a circular opening; or, the first opening 21 is an elliptical opening, wherein the difference between the length of the major axis and the minor axis of the ellipse is less than or equal to 20% of the length of the major axis; or, the first opening 21 is a regular N-gonal opening, wherein N≥16.

[0064] As mentioned earlier, the first opening 21 can be a circular opening, an elliptical opening, or a regular polygonal opening. Specifically, when the first opening 21 is an elliptical opening, the difference between the length of its major axis and the length of its minor axis must be less than or equal to 20% of the length of the major axis. That is, the length difference between the major axis and the minor axis should be small, so that the ellipse is closer to a perfect circle, avoiding distortion of the reflection diffraction pattern. Similarly, when the first opening 21 is a regular N-gon opening, its number of sides should be at least 16, that is, N is a positive integer greater than or equal to 16, reducing the contour difference between the regular polygon and the circle.

[0065] It is understandable that, in order to make the first opening 21 easier to process and to obtain the best reflection and diffraction effect, the first opening 21 can be set as a circular opening, and the first orthographic projection 22 of the circle can be set to be tangent to the two long sides of the third orthographic projection 42 of the rectangle, so as to form a good display and screen-off effect.

[0066] In some optional embodiments, the second opening 311 and the third opening 41 have the same shape, and the geometric centers of the second orthographic projection 312 and the third orthographic projection 42 coincide, with the edges of the second orthographic projection 312 and the corresponding edges of the third orthographic projection 42 being arranged parallel to each other.

[0067] In this embodiment, the second orthographic projection 312 is located within the first orthographic projection 22, and the first orthographic projection 22 is located within the third orthographic projection 42. Based on this, the second opening 311, which serves as a pixel opening, and the third opening 41, which serves as a light-emitting opening, should have the same shape and their edges should be arranged in parallel. This allows the brightness attenuation of the display panel 100 to be uniform and stable at various viewing angles, thereby creating a good display effect.

[0068] Specifically, the second orthographic projection 312 is located within the third orthographic projection 42. The two should have the same shape and angle, and their geometric centers should coincide. That is, the second orthographic projection 312 should be enlarged proportionally with its own geometric center as the midpoint, and should be able to coincide with the third orthographic projection 42 without rotation, so that the viewing angle brightness attenuation of the display panel 100 in all directions is consistent.

[0069] In some alternative embodiments, both the second opening 311 and the third opening 41 are rectangular.

[0070] In this embodiment, the second opening 311 is a pixel opening that defines the shape of the light-emitting pixel, while the third opening 41 has the same shape as the second opening 311. At this time, both the second opening 311 and the third opening 41 can be rectangular, so that the display panel 100 is easy to process and can achieve a good display effect by adjusting the pixel arrangement.

[0071] In some alternative embodiments, the pixel defining layer 31 covers the light-shielding layer 20 and partially fills the first opening 21.

[0072] In this embodiment, the pixel defining layer 31 defines a pixel opening, and the light-shielding layer 20 forms a first opening 21 around the pixel opening to adjust the reflection diffraction pattern. The pixel defining layer 31 is stacked on the light-shielding layer 20, and the pixel defining layer 31 can partially fill the first opening 21 of the light-shielding layer 20. Therefore, the height of the sidewall forming the second opening 311 is greater than the height of the sidewall forming the first opening 21, and the second opening 311 is disposed inside the first opening 21. By completely covering and partially filling the first opening 21 with the pixel defining layer 31, it is easy to adjust the relative position between the second opening 311 and the first opening 21.

[0073] It is understood that the light-shielding layer 20 in the embodiments of this application can be a continuously arranged layer structure, or it can be formed into multiple light-shielding layers 20 according to the arrangement and setting position of pixels, with each light-shielding layer 20 corresponding to one or more electrodes 111. This application does not make any specific limitation in this regard.

[0074] In some alternative embodiments, the area of ​​electrode 111 is greater than or equal to the area of ​​third opening 41, and third orthographic projection 42 is located within the outline of electrode 111.

[0075] In this embodiment, the electrodes 111 are disposed in the substrate 10. Each electrode 111 is correspondingly disposed in the thickness direction X to the openings in the three different layer structures. Furthermore, the electrodes 111 should cover the third orthographic projection 42. When ambient light enters, the light is reflected on the electrodes 111. By setting the electrodes 111 to cover the third orthographic projection 42, the reflected light can be made more uniform, and a certain margin can be left to avoid misalignment of the three openings in the display panel 100 due to processing errors, which would prevent the light-emitting unit 32 from being properly electrically connected to the electrodes 111, thereby improving the reliability of the display panel 100.

[0076] Optionally, in some embodiments, the electrode 111 should at least cover the first orthographic projection 22 to ensure that the light reflection effect formed on the electrode 111 at various points inside the first opening 21 is uniform and stable.

[0077] In some alternative embodiments, the light-shielding layer 20 comprises a resin doped with at least one of black dye and toner.

[0078] In this embodiment, the light-shielding layer 20 is a layer structure that has the function of blocking light from passing through. Similar to the black matrix layer 40, the light-shielding effect can be achieved by adjusting the material of the film structure, that is, by adding black dye or carbon powder to resin or other organic materials to form a light-shielding material, and using the material to prepare the light-shielding layer 20.

[0079] In some optional embodiments, the thickness of the light-shielding layer 20 is greater than or equal to 1 μm.

[0080] To ensure the light-shielding layer 20 has a good light-shielding effect, the light-shielding layer 20 in this embodiment needs to have a certain thickness. The specific thickness value can be designed according to the light-shielding degree of the material used and the processing conditions, so that the overall light-shielding degree of the final light-shielding layer 20 reaches a certain value. Specifically, the thickness of the light-shielding layer 20 can be greater than or equal to 1 μm.

[0081] It is understandable that different colored filters can be respectively set in the multiple third openings 41 of the black matrix layer 40 to form a color filter layer. The specific color setting method in the multiple third openings 41 can be designed according to the usage requirements. In addition, an organic adhesive layer 60 can also be set on the side of the black matrix layer 40 opposite to the light-emitting layer 30, and completely cover the black matrix layer 40 to reduce the degree of damage to the display panel 100 caused by water and oxygen intrusion or external stress.

[0082] Please refer to the following: Figures 4 to 7 , Figure 4 This is a flowchart of a method for manufacturing a display panel according to an embodiment of this application. Figure 5 yes Figure 4 The diagram shows the structure corresponding to step S2 in the manufacturing method of the display panel. Figure 6 yes Figure 4 The diagram shows the structure corresponding to step S3 in the manufacturing method of the display panel. Figure 7 yes Figure 4 A schematic diagram of the structure corresponding to step S5 in the manufacturing method of the display panel shown.

[0083] Secondly, according to embodiments of this application, a method for manufacturing a display panel 100 is provided, comprising:

[0084] S1. A substrate 10 is provided. The substrate includes an electrode layer 11. The electrode layer 11 includes a plurality of electrodes 111 spaced apart.

[0085] S2. A light-shielding layer 20 is prepared on one side surface of the substrate 10, and a plurality of first openings 21 are patterned to form each first opening 21 corresponding to one of the electrodes 111.

[0086] S3. A pixel defining layer 31 is prepared on the side of the light-shielding layer 20 away from the substrate 10. The pixel defining layer 31 at least partially fills the first opening 21 and is patterned to form a plurality of second openings 311, each of which is surrounded by one of the first openings 21.

[0087] S4. Prepare a light-emitting unit 32 in the second opening 311 and electrically connect the light-emitting unit 32 to the electrode 111.

[0088] S5. A black matrix layer 40 is prepared on the side of the pixel limiting layer 31 away from the light-shielding layer 20, and a plurality of third openings 41 are patterned to form such that the orthographic projection of each third opening 41 on the substrate 10 covers the orthographic projection of a first opening 21 on the substrate 10.

[0089] This application embodiment also provides a method for manufacturing a display panel 100, which first includes a step S1 of providing a substrate 10, and then a step S2 of preparing a light-shielding layer 20 on the substrate 10. The preparation of the light-shielding layer 20 in step S2 may include a coating of film material and a patterning step, wherein the patterning step may be performed using photolithography.

[0090] It is understood that the light-shielding layer 20 is made of resin material doped with black dye or toner, which is different from the organic layer structure material such as the pixel limiting layer. Therefore, different methods can be used when processing these two layers, such as photocuring or thermal curing. The specific processing method can be selected according to the processing conditions and the specific material used. This application does not impose any specific limitations on this.

[0091] Optionally, step S3, in preparing the pixel defining layer 31, may further include simultaneously preparing a support pillar 33. The support pillar 33 is disposed on the surface of the light-shielding layer 20 facing away from the substrate 10, and may be made of the same material as the pixel defining layer 31, thus allowing both to be prepared in the same process step. Alternatively, when... Figure 2 When the support pillar 33 and the pixel limiting layer 31 are respectively set in different layer structures, the pixel limiting layer 31 can be prepared first, and then the support pillar 33 can be prepared.

[0092] Please see Figure 8 , Figure 8 This is a schematic diagram of the structure of a display device provided in one embodiment of this application. In a third aspect, according to an embodiment of this application, a display device 200 is provided, including the display panel 100 in any embodiment of the first aspect.

[0093] This application also provides a display device 200, including the aforementioned display panel 100. The display device 200 can be any product or component with display functionality, such as a mobile phone, tablet computer, digital photo frame, or electronic paper. The display device 200 provided in this application embodiment has all the beneficial effects of the display panel 100 provided in this application embodiment. For details, please refer to the specific descriptions of the display panel 100 in the above embodiments; these descriptions will not be repeated here.

[0094] It is understood that the above description and details are merely exemplary and explanatory, and do not constitute a limitation on this application. Those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Thus, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A display panel, characterized in that, include: A substrate, including an electrode layer, the electrode layer including a plurality of electrodes spaced apart; A light-shielding layer is disposed on the substrate, and the light-shielding layer has a plurality of first openings. Each electrode is disposed opposite to one of the first openings and is exposed through the first opening. A light-emitting layer is disposed on the side of the light-shielding layer away from the substrate. The light-emitting layer includes a pixel defining layer having a plurality of second openings and a light-emitting unit disposed in the second opening. Each second opening is disposed opposite to a first opening. The light-emitting unit is electrically connected to the electrode. A black matrix layer is disposed on the side of the light-emitting layer away from the light-shielding layer. The black matrix layer has a plurality of third openings, each of which is disposed opposite to a second opening. Along the thickness direction, the orthographic projection of the first opening on the substrate constitutes a first orthographic projection, the orthographic projection of the second opening on the substrate constitutes a second orthographic projection, and the orthographic projection of the third opening on the substrate constitutes a third orthographic projection. The first orthographic projection is located inside the third orthographic projection, and the second orthographic projection is located inside the first orthographic projection, so that the reflection diffraction pattern of the display panel in the non-display state is circular.

2. The display panel according to claim 1, characterized in that, The first orthographic projection and the third orthographic projection are at least partially connected.

3. The display panel according to claim 1, characterized in that, The sidewall that encloses the first opening comprises multiple wall segments connected end to end in sequence. The wall segments are arc-shaped and the adjacent wall segments are smoothly connected. Alternatively, the wall surface is a plane, and the included angle between adjacent wall surfaces is greater than or equal to 157.5°.

4. The display panel according to claim 3, characterized in that, The first opening is a circular opening; Alternatively, the first opening may be an elliptical opening, wherein the difference between the length of the major axis and the minor axis of the ellipse is less than or equal to 20% of the major axis; Alternatively, the first opening is a regular N-gonal opening, where N ≥ 16.

5. The display panel according to claim 1, characterized in that, The second opening has the same shape as the third opening, and the geometric centers of the second orthographic projection and the third orthographic projection coincide. The edges of the second orthographic projection and the corresponding edges of the third orthographic projection are arranged parallel to each other.

6. The display panel according to claim 5, characterized in that, Both the second opening and the third opening are rectangular.

7. The display panel according to claim 1, characterized in that, The pixel-defining layer covers the light-shielding layer and partially fills the first opening.

8. The display panel according to claim 1, characterized in that, The area of ​​the electrode is greater than or equal to the area of ​​the third opening, and the third orthographic projection is located within the outline of the electrode.

9. The display panel according to claim 1, characterized in that, The light-shielding layer comprises a resin doped with at least one of black dye and toner.

10. The display panel according to claim 9, characterized in that, The thickness of the light-shielding layer is greater than or equal to 1 μm.

11. A method for manufacturing a display panel, characterized in that, include: A substrate is provided, the substrate including an electrode layer, the electrode layer including a plurality of electrodes spaced apart; A light-shielding layer is prepared on one side surface of the substrate, and a plurality of first openings are patterned thereon, each of the first openings being disposed corresponding to one of the electrodes; A pixel defining layer is formed on the side of the light-shielding layer opposite to the substrate. The pixel defining layer at least partially fills the first opening and is patterned to form a plurality of second openings, each of which is surrounded by one of the first openings. A light-emitting unit is prepared in the second opening, and the light-emitting unit is electrically connected to the electrode; A black matrix layer is prepared on the side of the pixel defining layer opposite to the light-shielding layer, and a plurality of third openings are patterned to form such that the orthographic projection of each of the third openings on the substrate covers the orthographic projection of one of the first openings on the substrate.

12. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 10.

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