CN115802847A - Display panel, manufacturing method thereof and display device - Google Patents

Abstract

The application relates to a display panel, a manufacturing method thereof and a display device, wherein the display panel comprises: a substrate including an electrode layer provided with an electrode; a light shielding layer having first openings, each electrode being disposed opposite to one of the first openings; a light emitting layer including a pixel defining layer having second openings, each of the second openings being disposed opposite to one of the first openings; the black matrix layer is provided with third openings, and each third opening is opposite to one second opening; along the thickness direction, orthographic projections of the first opening, the second opening and the third opening on the substrate respectively form a first orthographic projection, a second orthographic projection and a third orthographic projection, the first orthographic projection is positioned in the third orthographic projection, and the second orthographic projection is positioned in the first orthographic projection, so that the reflection diffraction pattern of the display panel in the non-display state approaches to a circle. The display panel provided by the embodiment of the application can improve the reflection diffraction pattern of the display panel in the breath screen state, and simultaneously reduces the reflectivity of the ambient light.

Description

Display panel, manufacturing method thereof, and display device

technical field

The present application relates to the field of display technology, in particular to a display panel, a manufacturing method thereof, and a display device.

Background technique

With the development of display technology, the existing users have gradually increased the performance requirements of the display panel in all aspects, not only limited to the performance of the display screen, but also have certain requirements for the effect of the off-screen state, and the display panel is in the off-screen state. The effect in this state is closely related to the reflection diffraction pattern formed by the display panel under the illumination of external ambient light. Since the pixel openings of existing display panels are usually square, when the display panel is illuminated by an external light source or ambient light in the off-screen state, the reflection and diffraction pattern it presents is similar to a cross, and the overall visual effect is poor.

Therefore, there is an urgent need for a display panel and a corresponding display device that can improve the non-uniform reflection diffraction pattern of each pixel opening to ambient light and the poor screen-off effect.

Contents of the invention

The present application provides a display panel, a manufacturing method thereof, and a display device, wherein the display panel can improve the effect of off-screen reflection and diffraction.

In the first aspect, a display panel is proposed according to an embodiment of the present application, including: a substrate including an electrode layer, and the electrode layer includes a plurality of electrodes arranged at intervals; a light-shielding layer arranged on the substrate, and a plurality of first Openings, each electrode is arranged opposite to one of the first openings and exposed in the first opening; the light emitting layer is arranged on the side of the light shielding layer away from the substrate, the light emitting layer includes a pixel defining layer with a plurality of second openings and is arranged on the first opening The light-emitting unit in the two openings, each second opening is arranged opposite to a first opening, and the light-emitting unit is electrically connected to the electrode; the black matrix layer is arranged on the side of the light-emitting layer away from the light-shielding layer, and the black matrix layer has a plurality of third Each third opening is opposite to a second opening; wherein, along the thickness direction, the orthographic projection of the first opening on the substrate constitutes the first orthographic projection, and the orthographic projection of the second opening on the substrate constitutes the second orthographic projection. 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 within the first orthographic projection, so that the display panel in the non-display state The reflection diffraction pattern is circular.

According to an aspect of the embodiments of the present application, the first orthographic projection and the third orthographic projection are at least partially contiguously arranged.

According to an aspect of the embodiment of the present application, the side walls that enclose and form the first opening include multiple sections of wall surfaces connected end to end in sequence, and the wall surfaces are arc-shaped surfaces with a smooth transition connection between adjacent wall surfaces; or, the wall surfaces are plane surfaces, and The included angle between adjacent wall surfaces is greater than or equal to 157.5°.

According to an aspect of the embodiment of the present application, it is characterized in that the first opening is a circular opening; or, the first opening is an elliptical opening, and the difference between the lengths of 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-gon opening, where N≥16.

According to an aspect of the embodiment of the present application, the shape of the second opening is the same as that of the third opening, and the geometric center of the second orthographic projection coincides with the geometric center of the third orthographic projection, and the edge of the second orthographic projection is parallel to the corresponding edge of the third orthographic projection set up.

According to an aspect of the embodiment of the present application, both the second opening and the third opening are rectangular.

According to an aspect of the embodiments of the present application, the pixel defining layer covers the light shielding layer and partially fills the first opening.

According to an aspect of the embodiment of the present 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.

According to an aspect of the embodiments of the present application, the light-shielding layer includes a resin doped with at least one of black dye and carbon powder.

According to an aspect of the embodiments of the present application, the thickness of the light-shielding layer is greater than or equal to 1 μm.

In the second aspect, according to an embodiment of the present application, a method for manufacturing a display panel is proposed, including: providing a substrate, the substrate includes an electrode layer, and the electrode layer includes a plurality of electrodes arranged at intervals; preparing a light-shielding layer on one side of the substrate, and forming a plurality of first openings by patterning, each first opening corresponding to one of the electrodes; preparing a pixel definition layer on the side of the light-shielding layer away from the substrate, the pixel definition layer at least partially fills the first openings, and patterning A plurality of second openings, each second opening 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; prepared on the side of the pixel defining layer away from the light-shielding layer The black matrix layer is patterned to form a plurality of third openings, so that the orthographic projection of each third opening on the substrate covers the orthographic projection of one of the first openings on the substrate.

In a third aspect, a display device is provided according to an embodiment of the present application, including the display panel in any embodiment of the first aspect.

In the display panel provided by the embodiment of the present application, the substrate, light-shielding layer, light-emitting layer, and black matrix layer are stacked in sequence, wherein the light-shielding layer has a plurality of first openings, and the pixel-defining layer in the light-emitting layer has a plurality of second openings. openings, and the black matrix layer has a plurality of third openings. On this basis, the orthographic projection of the first opening on the substrate is located within the orthographic projection of the third opening on the substrate, and the orthographic projection of the second opening on the substrate is located within the orthographic projection of the first opening on the substrate. In the display panel provided by the embodiment of the application, a light-shielding layer is set so that the orthographic projection of the opening is between the orthographic projection of the opening of the black matrix layer and the orthographic projection of the second opening as a pixel opening, so that by adjusting the first The shape and size of the opening can adjust the reflective diffraction pattern of the display panel in the off-screen state and reduce the reflectivity of external light without affecting the pixel opening, thereby effectively improving the off-screen effect of the display panel.

Description of drawings

The features, advantages, and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a display panel provided by an embodiment of the present application;

Fig. 2 is a schematic structural diagram of a display panel provided by another embodiment of the present application;

FIG. 3 is a schematic diagram of the orthographic projection structure of the first to third openings in the display panel provided by an embodiment of the present application;

FIG. 4 is a flow chart of a method for manufacturing a display panel provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram corresponding to step S2 in the manufacturing method of the display panel shown in FIG. 4;

FIG. 6 is a schematic structural diagram corresponding to step S3 in the manufacturing method of the display panel shown in FIG. 4;

FIG. 7 is a schematic structural diagram corresponding to step S5 in the manufacturing method of the display panel shown in FIG. 4;

FIG. 8 is a schematic structural diagram of a display device provided by an embodiment of the present application.

in:

100-display panel; 200-display device;

10-substrate; 20-shading layer; 30-luminescent layer; 40-black matrix layer;

11-electrode layer; 21-first opening; 22-first orthographic projection; 31-pixel definition layer; 32-light-emitting unit; 33-support pillar; 41-third opening; 42-third orthographic projection;

111-electrode; 311-second opening; 312-second orthographic projection;

X-thickness direction.

In the figures, the same parts are given the same reference numerals. The figures are not drawn to scale.

Detailed ways

The characteristics and exemplary embodiments of various aspects of the application will be described in detail below. In order to make the purpose, technical solution and advantages of the application clearer, the application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only configured to explain the application, not to limit the application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the statement "comprising..." does not exclude the presence of additional same elements in the process, method, article or device comprising said element.

It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean being directly on another layer or another region, or Other layers or regions are also included between it and another layer or another region. And, if the part is turned over, the layer, one region, will be "below" or "beneath" the other layer, another region.

Features and exemplary embodiments of various aspects of the present application will be described in detail below. Furthermore, the features, structures, or characteristics described hereinafter may be combined in any suitable manner in one or more embodiments.

With the development of display technology, the quality of display panels in the market is gradually improving. Correspondingly, customers have gradually stricter quality requirements for display panels. In addition to the display quality requirements in the conventional display process of display panels, the display There are also certain requirements for the appearance of the panel in the off-screen state, and the look and feel provided by the display panel to the user in the off-screen state is basically determined by the reflection effect of the display panel on the external ambient light. Further, in the process of reflecting the incident light from the outside , the formed reflection diffraction pattern is basically determined by the pixel opening area with the highest reflectivity, and the shape and size of the pixel opening have influence on the reflection diffraction pattern of the display panel.

On this basis, the inventors found that the existing display panels usually have polygonal pixel openings, most of which are rectangular. At this time, the reflection diffraction pattern formed by the display panel in the off-screen state is that the intersection point is located between the pixel openings. The cross shape between them makes the reflection and diffraction uneven and the effect is poor.

In order to solve the above problems, the embodiment of the present application proposes a display panel, which adds a light-shielding layer between the electrode layer and the pixel defining layer, and sets a corresponding opening in the light-shielding layer. And between the openings of the black matrix layer and the three kinds of openings are arranged correspondingly, so that the reflection diffraction pattern of the display panel can be made circular by setting the openings of the light shielding layer to be circular or close to a circle, and the reflection diffraction effect can be improved while reducing reflectivity.

It can be understood that the following embodiments of the present application only take the pixel opening in the display panel as an example for illustration, but the present application is not limited thereto, and can also be applied to display panels with other pixel opening shapes and pixel arrangements. , and protect it.

In order to better understand the present application, the manufacturing method of the display module, the display module and the display device provided by the embodiment of the present application will be described in detail below with reference to FIGS. 1 to 7 .

Please refer to Figures 1 to 3 together, Figure 1 is a schematic structural view of a display panel provided by an embodiment of the present application, Figure 2 is a schematic structural view of a display panel provided by another embodiment of the present application, and Figure 3 is an implementation of the present application The example provides a schematic diagram of the orthographic projection structure of the first to third openings in the display panel on the substrate.

In the first aspect, according to the embodiment of the present application, a display panel 100 is proposed, including a substrate 10, a light-shielding layer 20, a light-emitting layer 30, and a black matrix layer 40 arranged in sequence, wherein the substrate 10 includes an electrode layer 11, and the electrode layer 11 It includes a plurality of electrodes 111 arranged at intervals; the light-shielding layer 20 is arranged on one side of the substrate 10, and a plurality of first openings 21 are arranged on the light-shielding layer 20, and each electrode 111 is arranged opposite to one of the first openings 21 and exposed on the first opening 21. In an 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 a light emitting unit 32 disposed in the second openings 311, each A second opening 311 is arranged opposite to a first opening 21, and the light-emitting unit 32 is electrically connected to the electrode 111; the black matrix layer 40 is arranged on the side of the light-emitting layer 30 away from the light-shielding layer 20, and the black matrix layer 40 has a plurality of third openings 41 , each third opening 41 is opposite to one second opening 311 .

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 third opening 41 in The orthographic projection on the substrate 10 forms a 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 within the first orthographic projection 22 , so that the reflection diffraction pattern of the display panel 100 in a non-display state is circular.

The embodiment of the present application provides a display panel 100, which includes a substrate 10, and the substrate 10 may include a multi-layered film structure, wherein one of the two outermost film structures may be an electrode layer 11, more specifically The ground can be an anode layer, and a plurality of electrodes 111 are arranged in the electrode layer 11. The specific location, shape, and size of the electrodes 111 can be designed according to the required pixel size and the corresponding pixel arrangement. This is not specifically limited.

A light-shielding layer 20 is stacked on the surface of the substrate 10 close to the electrode layer 11 . Similar to the black matrix, the light-shielding layer 20 is made of a material with a light-shielding effect. A plurality of first openings 21 are arranged in the light-shielding layer 20, and these first openings 21 are provided in one-to-one correspondence with a plurality of electrodes 111, that is, the orthographic projection of the first openings 21 on the substrate 10 can be located in the electrodes 111, so that the electrodes 111 It can be exposed outside through the first opening 21 .

A light-emitting layer 30 is stacked on the surface of the light-shielding layer 20 facing away from the substrate 10, and the light-emitting layer 30 includes a pixel definition layer 31 for forming a pixel opening and a light-emitting unit 32 disposed in the pixel opening, that is, the second opening 311, Wherein the second opening 311 is provided in one-to-one correspondence with the first opening 21 . That is, the pixel defining layer 31 in the embodiment of the present application forms a second opening 311 with a smaller area inside the first opening 21 . The light-emitting units 32 are electrically connected to form light-emitting elements required for display.

It can be understood 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, and the second opening 311 in the pixel defining layer 31 is used as a pixel opening. , used to define the specific position and shape of the light-emitting pixels, can be designed according to the required pixel size and arrangement, and set correspondingly to the electrodes 111 .

Optionally, the light-emitting unit 32 in the light-emitting layer 30 may include required structures such as an organic light-emitting layer and a cathode layer. structure.

On this basis, as shown in FIG. 1 , the pixel-defining layer 31 in the embodiment of the present application can be stacked with the light-shielding layer 20 and basically cover the light-shielding layer 20. At this time, a part of the pixel-defining layer 31 extends into the first opening 21 The second opening 311 is defined in the center, and the support pillar 33 is disposed on the side of the light shielding layer 20 away from the substrate 10 , that is, disposed inside the pixel defining layer 31 . Alternatively, as shown in FIG. 2 , the pixel defining layer 31 in the embodiment of the present application may only be disposed in the first opening 21, and a second opening 311 with a smaller area is further defined inside the first opening 21, that is, the The pixel defining layer 31 and the light-shielding layer 20 are set on the same layer and have the same thickness. At this time, the support pillars 33 are still set on the side of the light-shielding layer 20 facing away from the substrate 10 , but are spaced apart from the pixel defining layer 31 and set on different layers.

To sum up, the specific setting method of the pixel definition layer 31 can be selected according to processing conditions, etc., which is not specifically limited in this application.

A black matrix layer 40 is provided on the side of the light-emitting layer 30 away from the light-shielding layer 20 for shielding structures such as circuit wiring required by pixels. It can be understood that a functional layer 50 can also be provided between the light emitting layer 30 and the black matrix layer 40, and different layer structures can be provided inside the functional layer 50 according to the functions that the display panel 100 needs to achieve, for example: touch layer As well as the encapsulation layer, etc., the present application makes no specific limitation on this. The black matrix layer 40 in the embodiment of the present application has a plurality of third openings 41, and these third openings 41 are provided in one-to-one correspondence with the second openings 311, and along the thickness direction X of the display panel, the third openings 41 are The orthographic projection on the substrate 10 encloses the orthographic projection of the first opening 21 on the substrate 10 , forming the one with the largest area among the aforementioned three openings in this application.

It can be understood that the off-screen reflection diffraction pattern of the display panel 100 provided in the embodiment of the present application is circular, and the so-called "circular" means that the reflection diffraction pattern is a perfect circle or approximates to round

On this basis, along the thickness direction X, the orthographic projection of the first opening 21 of the light shielding layer 20 on the substrate 10 constitutes the first orthographic projection 22, and the orthographic projection of the second opening 311 of the pixel defining layer 31 on the substrate 10 constitutes the first orthographic projection. Two orthographic projections 312, the orthographic projection of the third opening 41 of the black matrix layer 40 on the substrate 10 constitutes a third orthographic projection 42, and the third orthographic projection 42 surrounds the first orthographic projection 22, and the first orthographic projection 22 again Surrounding the second orthographic projection 312 , that is, the electrode 111 and the aforementioned three openings are arranged in one-to-one correspondence, and the orthographic projections of the three openings form a three-layer nested structure, and this nested structure is located inside the electrode 111 . In such a structure, both the third opening 41 and the first opening 21 are openings provided in the layer structure with a light-shielding effect, so when the external ambient light enters the display panel 100, the shape of the reflected light is determined by The third opening 41 and the smaller one of the first opening 21, that is, the shape of the first opening 21 is determined. At this time, the shape of the part of the first opening 21 that is not blocked by the third opening 41 is adjusted to make it a circle. Shaped or close to a circle, the reflection diffraction pattern of the display panel 100 in the off-screen state can also be circular or close to a circle, thereby improving the off-screen reflection and diffraction effect and improving the overall quality of the display panel 100 .

Moreover, the second opening 311 is used as the pixel opening in the display panel 100 in the embodiment of the present application, and the shape of the second opening 311 is not limited, it only needs to be arranged in the first opening 21, so it can be used in different places. The off-screen reflection and diffraction effect of the display panel 100 is improved on the premise of affecting the shape and arrangement of the pixels themselves, without changing the original optical effect, and reducing the impact on the conventional display of the display panel 100, thereby reducing the impact on production costs.

Further, 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, and on the premise that the first opening 21 is arranged on the light shielding layer 20, it can increase The area covered by the light-shielding layer further reduces the reflectivity of the display panel 100 .

In some optional embodiments, the first orthographic projection 22 is at least partially contiguous with the third orthographic projection 42 .

Along the thickness direction X, the orthographic projection of the opening of the light-shielding layer 20 on the substrate 10 in the embodiment of the present application constitutes the first orthographic projection 22, and the orthographic projection of the opening of the black matrix layer 40 on the substrate 10 constitutes the third orthographic projection 42, each The first orthographic projection 22 and the third orthographic projection 42 formed by the orthographic projections of a group of correspondingly arranged openings on the substrate 10 may be contiguously arranged. Specifically, the first orthographic projection in the embodiment of the present application is circular or close to circular, and the shape of the third orthographic projection is determined according to the pixel opening, which is usually a rectangle or other polygons. On this basis, the connected fingers The first orthographic projection 22 and the third orthographic projection 42 are set at least partially tangentially, so that the first orthographic projection 22 with the largest area can be obtained inside the third orthographic projection 42 of the preset area, reducing the The area or shape of the second opening 311 located inside the first opening 21 , that is, the pixel opening is limited to avoid adverse effects on the pixel arrangement required for conventional display on the display panel 100 .

In some optional embodiments, the side walls surrounding and forming the first opening 21 include multiple sections of wall surfaces connected end to end in sequence, and the wall surfaces are arc-shaped surfaces with smooth transition connections between adjacent wall surfaces; or, the wall surfaces are plane, and The included angle between adjacent walls is greater than or equal to 157.5°.

In order to make the reflection diffraction pattern formed by the reflected light passing through the first opening 21 circular or close to circular, the shape of the side walls surrounding the first opening 21 can be adjusted accordingly. On this basis, the first opening 21 can be surrounded by multiple sections of wall surfaces that are connected end to end in sequence. These wall surfaces can have a certain curvature and have a smooth transition between adjacent wall surfaces. At this time, the first orthographic projection 22 can form a circle. , oval, or other approximately circular shape with curved edges.

Alternatively, the walls enclosing the first opening 21 may be flat and the angle of intersection between adjacent walls is greater than or equal to 157.5°, so that the first orthographic projection 22 forms a polygon with a number of sides exceeding a certain value, and the size of the angle of intersection reaches the aforementioned On the premise of requirements, the first orthographic projection 22 may be a regular polygon with the same wall width, or the first orthographic projection 22 may have multiple walls with unequal widths.

In some optional embodiments, the first opening 21 is a circular opening; or, the first opening 21 is an oval opening, and the length difference between 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 21 is a regular N-gon opening, where N≧16.

As mentioned above, 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 length of its major axis and the length of its minor axis The difference 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 to a greater extent, avoiding distortion of the reflection diffraction pattern. Similarly, when the first opening 21 is a regular N-sided opening, the number of sides should be at least 16, that is, N is a positive integer greater than or equal to 16, so as to reduce the contour difference between a regular polygon and a circle.

It can be understood that, in order to make the first opening 21 easy to process and obtain the best reflection diffraction effect, the first opening 21 can be set as a circular opening, and the circular first orthographic projection 22 can be compared with the rectangular first The two long sides of the three orthographic projections 42 are set tangentially so as to form a good display and screen-stop effect.

In some optional embodiments, the second opening 311 has the same shape as the third opening 41, and the geometric center of the second orthographic projection 312 coincides with the geometric center of the third orthographic projection 42, and the edge of the second orthographic projection 312 coincides with the third orthographic projection 42. The corresponding edges of projection 42 are arranged in parallel.

In the embodiment of the present application, the second orthographic projection 312 is located in the first orthographic projection 22, and the first orthographic projection 22 is located in the third orthographic projection 42. Based on this, the second opening 311 as a pixel opening and the third orthographic opening as a light outlet The openings 41 should have the same shape and each edge should be arranged in parallel, so that the brightness attenuation of the display panel 100 at each viewing angle can be uniform and stable, thereby forming a good display effect.

Specifically, the second orthographic projection 312 is located within the third orthographic projection 42, and both should have the same shape and angle, and their geometric centers should coincide, that is, the second orthographic projection 312 should be proportionally enlarged with its own geometric center as the midpoint. It can coincide with the third orthographic projection 42 on the premise of no rotation, so that the viewing angle luminance attenuation in all directions of the display panel 100 is consistent.

In some optional embodiments, both the second opening 311 and the third opening 41 are rectangular.

The second opening 311 in the embodiment of the present application is a pixel opening that defines the shape of a light-emitting pixel, while the third opening 41 and the second opening 311 maintain the same shape. At this time, the second opening 311 and the third opening 41 may both be rectangular, In order to make the display panel 100 easy to process, and a good display effect can be obtained by adjusting pixel arrangement.

In some optional embodiments, the pixel defining layer 31 covers the light shielding layer 20 and partially fills the first opening 21 .

The pixel definition layer 31 in the embodiment of the present application is used to define the pixel opening, and the light shielding layer 20 is used to form the first opening 21 around the pixel opening to adjust the reflection diffraction pattern. The pixel definition layer 31 is stacked on the light shielding layer 20, and the pixel The limiting layer 31 can be partially filled in the first opening 21 of the light shielding layer 20, so the height of the side walls surrounding the second opening 311 is greater than the height of the side walls surrounding the first opening 21, and the second opening 311 is disposed at Inside the first opening 21. Completely covering and partially filling the pixel defining layer 31 in the first opening 21 can facilitate adjustment of the relative position between the second opening 311 and the first opening 21 .

It can be understood that the light-shielding layer 20 in the embodiment of the present application can be a layer structure arranged continuously, or it can also be formed into a plurality of light-shielding layers 20 at intervals according to the arrangement of pixels and the setting position, and each light-shielding layer 20 corresponds to One or more electrodes 111 are provided, which is not specifically limited in this application.

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

The electrodes 111 in the embodiment of the present application are arranged in the substrate 10, and each electrode 111 is arranged corresponding to openings in three different layer structures in the thickness direction X. On this basis, the electrodes 111 should project the third orthographic projection 42 covered. When external ambient light enters, the light is reflected on the electrode 111. Setting the electrode 111 to cover the third orthographic projection 42 can make the reflected light more uniform, and can leave a certain margin to avoid the display panel 100. Dislocation of the three openings due to processing errors and the like causes the light emitting unit 32 to fail to be electrically connected to the electrode 111 normally, thereby improving the reliability of the display panel 100 .

Optionally, in some embodiments, the electrode 111 should at least ensure that the first orthographic projection 22 is covered, so as to ensure that the light reflection effect formed on the electrode 111 in the first opening 21 is uniform and stable.

In some optional embodiments, the light-shielding layer 20 includes a resin doped with at least one of black dye and carbon powder.

The light-shielding layer 20 in the embodiment of the present application is a layer structure with the function of preventing 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 layer structure, that is, in resin or other organic Materials such as black dye or carbon powder are mixed into the material to form a light-shielding material, and the light-shielding layer 20 is prepared using this material.

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

In order to make the light-shielding layer 20 have a good light-shielding effect, the light-shielding layer 20 in the embodiment of the present application needs to have a certain thickness, and its specific thickness value can be designed according to the light-shielding degree of the material used and the processing conditions, so that the final obtained The overall light-shielding degree of the light-shielding layer 20 reaches a certain value. Specifically, the thickness of the light shielding layer 20 may be greater than or equal to 1 μm.

It can be understood that, in the plurality of third openings 41 of the black matrix layer 40, filters of different colors can be correspondingly arranged to form a color filter layer, and the specific color setting method in the plurality of third openings 41 can be according to Use your own design requirements. In addition, an organic adhesive layer 60 may be provided on the side of the black matrix layer 40 away from the light-emitting layer 30 to completely cover the black matrix layer 40 to reduce damage to the display panel 100 caused by water and oxygen intrusion or external stress.

Please refer to FIGS. 4 to 7 together. FIG. 4 is a flowchart of a method for manufacturing a display panel provided by an embodiment of the present application. FIG. 5 is a schematic structural diagram corresponding to step S2 in the method for manufacturing a display panel shown in FIG. 4 . 6 is a schematic structural diagram corresponding to step S3 in the manufacturing method of the display panel shown in FIG. 4 , and FIG. 7 is a schematic structural diagram corresponding to step S5 in the manufacturing method of the display panel shown in FIG. 4 .

In the second aspect, according to the embodiment of the present application, a method for manufacturing the display panel 100 is proposed, including:

S1. Provide a substrate 10, the substrate includes an electrode layer 11, and the electrode layer 11 includes a plurality of electrodes 111 arranged at intervals;

S2. Prepare a light-shielding layer 20 on one side surface of the substrate 10, and form a plurality of first openings 21 by patterning, and each first opening 21 corresponds to one of the electrodes 111;

S3. Prepare a pixel-defining layer 31 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 pattern to form a plurality of second openings 311, each second opening 311 is covered surrounded by one of the first openings 21;

S4. Prepare a light emitting unit 32 in the second opening 311, and electrically connect the light emitting unit 32 to the electrode 111;

S5. Prepare a black matrix layer 40 on the side of the pixel defining layer 31 away from the light-shielding layer 20, and form a plurality of third openings 41 by patterning, so that the orthographic projection of each third opening 41 on the substrate 10 will be a first opening The orthographic projection of 21 on the substrate 10 is overlaid.

The embodiment of the present application also provides a manufacturing method of the 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 . In the preparation process of the light-shielding layer 20 in step S2, a step of coating film material and a step of patterning may be included, wherein the step of patterning may be performed by photolithography.

It can be understood that the light-shielding layer 20 is made of a resin material doped with black dye or carbon powder, which is different from the material of the organic layer structure such as the pixel defining layer, so different methods can be used when processing the two layer structures separately. For example, photocuring or heat curing is used respectively, and the specific processing method can be selected according to the processing conditions and the specific material used, which is not specifically limited in the present application.

Optionally, the step S3 of preparing the pixel defining layer 31 may also include synchronously preparing the supporting pillars 33. The supporting pillars 33 are arranged on the surface of the light shielding layer 20 away from the substrate 10, and may be made of the same material as the pixel defining layer 31. , so both can be prepared in the same process step. Alternatively, when the supporting pillars 33 and the pixel defining layer 31 are respectively disposed in different layer structures as shown in FIG. 2 , the pixel defining layer 31 can also be prepared first, and then the supporting pillars 33 can be prepared.

Please refer to FIG. 8 . FIG. 8 is a schematic structural diagram of a display device provided by an embodiment of the present application. In a third aspect, according to an embodiment of the present application, a display device 200 is provided, including the display panel 100 in any embodiment of the first aspect.

The present application further provides a display device 200 , including the above-mentioned display panel 100 , and the display device 200 may be any product or component with a display function such as a mobile phone, a tablet computer, a digital photo frame, and an electronic paper. The display device 200 provided in the embodiment of the present application has all the beneficial effects of the display panel 100 provided in the embodiment of the present application. For details, reference may be made to the specific descriptions of the display panel 100 in the above embodiments, and details will not be repeated here in this embodiment.

It can be understood that the above descriptions and detailed descriptions are only exemplary and explanatory, and cannot be construed as limiting the application. Those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. . In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (10)

1. A display panel, comprising:

the electrode layer comprises a plurality of electrodes arranged at intervals;

the light shielding layer is arranged on the substrate, a plurality of first openings are formed in the light shielding layer, and each electrode is arranged opposite to one of the first openings and is exposed out of the first opening;

the light-emitting layer is arranged on one side, away from the substrate, of the light shielding layer and comprises a pixel limiting layer with a plurality of second openings and light-emitting units arranged in the second openings, each second opening is opposite to one first opening, and the light-emitting units are electrically connected with the electrodes;

the black matrix layer is arranged on one side, away from the light shielding layer, of the light emitting layer and provided with a plurality of third openings, and each third opening is opposite to one second opening;

along the thickness direction, the orthographic projection of the first opening on the substrate forms a first orthographic projection, the orthographic projection of the second opening on the substrate forms a second orthographic projection, the orthographic projection of the third opening on the substrate forms 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 a non-display state is circular.

2. A display panel as claimed in claim 1 characterized in that the first orthographic projection is arranged at least partly contiguous to the third orthographic projection.

3. The display panel according to claim 1, wherein the side walls enclosing the first opening comprise a plurality of wall surfaces connected end to end in sequence, the wall surfaces are arc-shaped surfaces, and the adjacent wall surfaces are connected in a smooth transition manner;

or the wall surfaces are planes, and the included angle between the adjacent wall surfaces is larger than or equal to 157.5 degrees.

4. The display panel according to claim 3, wherein the first opening is a circular opening;

or the first opening is an elliptical opening, and the length difference 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-edge opening, wherein N is more than or equal to 16.

5. The display panel according to claim 1, wherein the second opening and the third opening are the same in shape, and the second orthographic projection coincides with a geometric center of the third orthographic projection, and an edge of the second orthographic projection is disposed in parallel with a corresponding edge of the third orthographic projection;

preferably, the second opening and the third opening are both rectangular.

6. The display panel according to claim 1, wherein the pixel defining layer covers the light shielding layer and partially fills the first opening.

7. The display panel of claim 1, wherein the area of the electrode is greater than or equal to the area of the third opening, and the third orthographic projection is within the outline of the electrode.

8. The display panel according to claim 1, wherein the light shielding layer comprises a resin doped with at least one of a black dye and carbon powder;

preferably, the light-shielding layer has a thickness of 1 μm or more.

9. A method of manufacturing a display panel, comprising:

providing a substrate, wherein the substrate comprises an electrode layer, and the electrode layer comprises a plurality of electrodes arranged at intervals;

preparing a light shielding layer on one side surface of the substrate, and patterning to form a plurality of first openings, wherein each first opening is arranged corresponding to one of the electrodes;

preparing a pixel defining layer on one side of the light shielding layer, which faces away from the substrate, wherein the pixel defining layer is at least partially filled in the first openings and is patterned to form a plurality of second openings, and each second opening is surrounded by one first opening;

preparing a light emitting unit in the second opening and electrically connecting the light emitting unit with the electrode;

and preparing a black matrix layer on one side of the pixel limiting layer, which is opposite to the light shielding layer, and patterning to form a plurality of third openings, so that the orthographic projection of each third opening on the substrate covers the orthographic projection of one first opening on the substrate.

10. A display device comprising the display panel according to any one of claims 1 to 8.

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