CN114335388A

CN114335388A - Display panel and display device

Info

Publication number: CN114335388A
Application number: CN202111651586.4A
Authority: CN
Inventors: 蔡雨
Original assignee: Hubei Changjiang New Display Industry Innovation Center Co Ltd
Current assignee: Hubei Changjiang New Display Industry Innovation Center Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-04-12
Anticipated expiration: 2041-12-30
Also published as: CN114335388B

Abstract

The embodiment of the application provides a display panel and a display device, wherein a pixel defining layer comprises a plurality of first openings, a light-emitting material layer is arranged in the first openings, a low-refractive-index layer comprises a plurality of second openings, and a high-refractive-index layer fills the second openings; the projected outer outlines of the first opening and the second opening are respectively a first shape and a second shape, after the first shape is translated to enable the center point of the first shape to be coincided with the center point of the second shape, the first shape is reduced or enlarged to a third shape in an equal proportion, and the second shape surrounds the third shape and has a plurality of intersection points with the third shape; the edge of the second shape is a first edge, the edge of the third shape opposite to the first edge is a second edge, and the first edge comprises at least three points with different distances from the second edge. The display panel and the display device provided by the embodiment of the application have stable light emitting efficiency.

Description

Display panel and display device

[ technical field ] A method for producing a semiconductor device

The application relates to the technical field of display, in particular to a display panel and a display device.

[ background of the invention ]

Organic electroluminescent diode (OLED) Display panels are widely used due to their excellent characteristics, such as high brightness, high efficiency, wide viewing angle, and self-luminescence.

At present, the OLED display panel mostly adopts a top emission mode, and in order to extract light emitted by the light emitting element to a greater extent and improve the light extraction efficiency of the panel, a light extraction layer is usually disposed in the panel. Wherein, be provided with simple lens structure in the light lifting layer and regard as light extraction structure, light extraction structure promotes the light yield through the refraction effect to light. However, the inventors found that there is a large difference in the light extraction efficiency between batches of display panels produced in different batches using the light extraction structure.

[ application contents ]

In view of the above, embodiments of the present application provide a display panel and a display device.

In a first aspect, an embodiment of the present application provides a display panel, including:

a substrate base plate;

a pixel defining layer including a plurality of first openings;

a light emitting material layer disposed within the first opening;

the low-refractive-index layer is arranged on one side, far away from the substrate base plate, of the pixel defining layer; the low refractive index layer comprises a plurality of second openings, and the projection of the second openings on the substrate base plate is overlapped with the projection of the first openings on the substrate base plate;

the high-refractive-index layer is arranged on one side, facing the light-emitting surface of the display panel, of the low-refractive-index layer; the high refractive index layer fills the second opening;

wherein the projected outer contour of the first opening on the substrate base plate is a first shape, the projected outer contour of the second opening on the substrate base plate is a second shape, and the area of the second shape is larger than that of the first shape; the relationship of the first shape and the second shape where there is an overlap satisfies:

translating the first shape to make the center point of the first shape coincide with the center point of the second shape, and then scaling down or enlarging the first shape to a third shape, wherein the second shape surrounds the third shape, and the third shape is intersected with the second shape and has a plurality of intersection points;

a region located between two adjacent and spaced-apart said intersections and distant from said third shape, an edge of said second shape being a first edge, an edge of said third shape opposite to said first edge being a second edge; in the oppositely arranged first edge and second edge, the first edge comprises at least three points with different distances from the second edge.

In an implementation manner of the first aspect, the first shape is a projection of a surface of the first opening far from the substrate base plate on the substrate base plate, and the second shape is a projection of a surface of the second opening near to the substrate base plate on the substrate base plate.

In one implementation manner of the first aspect, any two adjacent and separated intersection points are located between and far away from a region of the third shape, an edge of the second shape is the first edge, and an edge of the third shape opposite to the first edge is the second edge;

in any oppositely arranged first edge and second edge, the first edge comprises at least three points with different distances from the second edge.

In one implementation manner of the first aspect, any two adjacent intersection points of the plurality of intersection points of the third shape and the second shape are located apart from each other.

In one implementation manner of the first aspect, at least one of the first edges includes at least three points that are consecutive and have different distances from the opposite second edge.

In one implementation of the first aspect, the first and second opposing edges form a fourth shape; a line connecting the two intersections in the fourth shape is perpendicular to at least one axis of symmetry of the fourth shape.

In one implementation of the first aspect, the first and second opposing edges form a fourth shape; the fourth shape comprises a vertex distal from the second edge; in the fourth shape, a portion of the first edge between the vertex and the intersection is convex toward the second edge.

In an implementation manner of the first aspect, the first shape is a polygon, and a distance between any one side of the first shape and the first edge opposite to the side includes at least three values.

In one implementation of the first aspect, a portion of an edge of the second shape that is opposite to one edge of the first shape includes a plurality of raised structures.

In one implementation manner of the first aspect, the edges of the first shape include curves, and a distance between any one curve of the first shape and an edge of the second shape opposite to the curve of the first shape includes at least three values.

In one implementation of the first aspect, a portion of the edge of the second shape that is opposite to one curve of the first shape comprises a plurality of raised structures.

In a second aspect, an embodiment of the present application provides a display device, including the display panel as provided in the first aspect.

When the first opening and the second opening are staggered along the arrangement direction of the first edge and the opposite third edge, because the distance from the first edge to the third edge in the display panel provided by the embodiment of the application still comprises a plurality of values, the light emitting efficiency of the display panel cannot be changed too much, and the light emitting efficiency of the display panels produced and prepared in different batches is ensured to be basically not different. In addition, in the display panel provided by the embodiment of the application, the risk that the overlapping area of the light emitting device and the light extraction structure is obviously reduced due to the large dislocation of the first opening and the second opening is reduced, and the light extraction effect of the light extraction structure on the light emitting device is ensured.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of a display panel according to an embodiment of the present disclosure;

FIG. 2 is a schematic projection view of a first opening and a second opening of the display panel shown in FIG. 1;

FIG. 3 is another schematic projection diagram of the first opening and the second opening of the display panel shown in FIG. 1;

FIG. 4 is a schematic diagram illustrating a relationship between a distance between a first edge and an opposite third edge of a display panel and an improvement in luminous efficiency;

FIG. 5 is a schematic diagram illustrating a comparison between a display panel provided in an embodiment of the present application and a display panel in the related art;

FIG. 6 is a schematic diagram illustrating another comparison between a display panel and a related art display panel according to an embodiment of the present application;

FIG. 7 is a schematic projection view of the first opening and the second opening;

FIG. 8 is a schematic view of various projections of the first opening and the second opening;

FIG. 9 is another schematic projection view of the first opening and the second opening;

FIG. 10 is a schematic perspective view of the first opening and the second opening;

FIG. 11 is a schematic view of various projections of the first opening and the second opening;

FIG. 12 is a schematic view of another projection of the first opening and the second opening;

fig. 13 is a schematic view of a display device according to an embodiment of the present disclosure.

[ detailed description ] embodiments

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description herein, it is to be understood that the terms "substantially", "approximately", "about", "substantially", and the like, as used in the claims and the examples herein, are intended to be generally accepted as not being precise, within the scope of reasonable process operation or tolerance.

It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present application to describe shapes, openings, edges, etc., these openings, shapes, edges, etc. should not be limited to these terms. These terms are only used to distinguish one shape, opening, edge, etc. from another. For example, a first shape may also be referred to as a second shape, and similarly, a second shape may also be referred to as a first shape, without departing from the scope of embodiments of the present application.

The applicant provides a solution to the problems of the prior art through intensive research.

Fig. 1 is a schematic cross-sectional view of a display panel according to an embodiment of the present disclosure, fig. 2 is a schematic projection view of a first opening and a second opening in the display panel shown in fig. 1, and fig. 3 is a schematic projection view of the first opening and the second opening in the display panel shown in fig. 1.

As shown in fig. 1, the display panel provided in the embodiment of the present application includes a substrate 01, a pixel defining layer 21, a light emitting material layer 22, a low refractive index layer 31 and a high refractive index layer 32, wherein the low refractive index layer 31 and the high refractive index layer 32 are disposed on a side of the light emitting material layer 22 facing a light emitting surface of the display panel, and the high refractive index layer 32 is disposed on a side of the low refractive index layer 31 facing the light emitting surface of the display panel. The pixel defining layer 21, the light emitting material layer 22, the low refractive index layer 31, and the high refractive index layer 32 may be disposed on the same side of the base substrate 01, and the low refractive index layer 31 may be disposed on a side of the pixel defining layer 21 away from the base substrate 01.

The pixel defining layer 21 includes a plurality of first openings 210, and the light emitting material layer 22 is disposed within the first openings 210, the first openings 210 of the pixel defining layer 21 define the positions of the light emitting devices 20.

The light emitting material layer 22 may further include a first electrode 23 and a second electrode 24 on two sides, wherein the light emitting material layer 22, the first electrode 23 and the second electrode 24 are all included in the light emitting device 20. The light emitting device 20 may be an organic light emitting device or a micro light emitting diode.

The low refractive index layer 31 includes a plurality of second openings 310, and the high refractive index layer 32 fills the second openings 310. Note that the high refractive index layer 32 may include a portion covering other positions of the low refractive index layer 31 in addition to the portion filled in the second opening 310, for example, as shown in fig. 1, the high refractive index layer 32 completely covers the low refractive index layer 31.

Here, the refractive index of the low refractive index layer 31 is smaller than the refractive index of the high refractive index layer 32, and the interface between the low refractive index layer 31 and the high refractive index layer 32 is the interface between the optically thinner medium and the optically denser medium. The portion of the high refractive index layer 32 located within the second opening 310 and the low refractive index layer 31 at the periphery thereof may constitute the light extraction structure 30.

Referring to fig. 1, fig. 2 and fig. 3, a projection of the second opening 310 on the substrate base 01 overlaps a projection of the first opening 210 on the substrate base 01, that is, a projection of the light extraction structure 30 overlaps a projection of the light emitting device 20 along a thickness direction of the display panel. The light extraction structure 30 may extract light emitted from the light emitting device 20, increasing the light extraction rate of the light emitted from the light emitting device 20.

Specifically, referring to fig. 1, since the sidewall of the second opening 310 is an interface between the optically thinner medium and the optically denser medium, light rays smaller than the critical angle in the light rays emitted from the light emitting device 20 and incident on the sidewall of the second opening 310 are totally reflected, and the light path of the light rays is changed into small-angle light rays. Then, of the light emitted by the light emitting device 20 and incident on the sidewall of the second opening 310, the final outgoing angle of a part of the light from the display panel after the light path of the light is changed is smaller than the angle of the light incident on the sidewall of the second opening 310, so that the light emitting rate of the light emitted by the light emitting device 20 is increased and the color shift is reduced.

With continued reference to fig. 2 and fig. 3, the projected outer contour of the first opening 210 on the substrate base 01 is a first shape 210 ', the projected outer contour of the second opening 310 on the substrate base 01 is a second shape 310', and the area of the second shape 310 'is larger than the area of the first shape 210'. That is, the area of the light extraction structure 30 projected on the substrate base 01 is larger than the area of the light emitting device 20 projected on the substrate base 01, so that the light emitted from the light emitting device 20 is extracted as much as possible by the light extraction structure 30.

Meanwhile, the projection of the second opening 310 on the substrate base plate 01 overlaps with the projection of the first opening 210 on the substrate base plate 01, and then there is an overlap between the projections of the first shape 210 'and the second shape 310'.

With continued reference to fig. 2 and 3, the relationship between the first shape 210 'and the second shape 310' having an overlap satisfies the following condition:

translating the first shape 210 ' such that its center point coincides with the center point of the second shape 310 ', and then scaling down or enlarging the first shape 210 ' to a third shape 210 ″ such that the second shape 310 ' surrounds the third shape 210 ″ and the third shape 210 ″ intersects the second shape 310 ' with a plurality of intersection points; a region located between two adjacent and distant intersection points and distant from the third shape 210 ", the edge of the second shape 310' being a first edge 3101, the edge of the third shape 210" opposite to the first edge 3101 being a second edge 2101; of the first edge 3101 and the second edge 2101 which are oppositely disposed, the first edge 3101 includes at least three points which are different in distance from the second edge 2101.

Here, the distance from a point in the first edge 3101 to the second edge 2101 may refer to the distance between a point in the first edge 3101 and the second edge 2101 along the arrangement direction between the first edge 3101 and the second edge 2101. The distance from a point in the first edge 3101 to the second edge 2101 may also refer to the vertical distance from a point in the first edge 3101 to the second edge 2101. To avoid confusion, in the embodiment of the present application, the distance between the first edge 3101 and the second edge 2101 along the arrangement direction of the first edge 3101 and the second edge 2101 is defined as the distance from the first edge 3101 to the second edge 2101, and the distance between the point on the first edge 3101 and the point on the second edge 2101 along the arrangement direction of the first edge 3101 and the second edge 2101 is defined as the distance from the point on the first edge 3101 to the second edge 2101.

For example, as shown in fig. 2 and 3, when the center points of the first shape 210 ' and the second shape 310 ' are overlapped, the third shape 210 "is obtained by enlarging the first shape 210 ' to the same scale as the intersection point with the second shape 310 ', and the intersection point of the third shape 210" and the second shape 310 ' includes the adjacent and separated intersection point D and intersection point E. In an upper region between the intersection points D and E, the first edge 3101 includes a point a, a point B, and a point C, and the distances from the points a, B, and C to the second edge 2101 are different from each other.

In the present embodiment, the first shape 210 'includes a third edge 2101' corresponding to the second edge 2101. When the first edge 3101 is disposed opposite to the second edge 2101, the first edge 3101 is also disposed opposite to the third edge 2101'; and of the first edge 3101 and the third edge 2101 'which are oppositely disposed, the first edge 3101 includes at least three points which are different in distance from the third edge 2101'. For example, as shown in fig. 2 and 3, in the first edge 3101 and the third edge 2101 'which are provided to face each other, distances from a point a, a point B, and a point C in the first edge 3101 to the facing third edge 2101' are HA, HB, and HC, respectively, and HA, HB, and HC are not equal to each other.

In the present embodiment, the first edge 3101 opposite to one second edge 2101 may be regarded as a protrusion structure having a different protrusion height with respect to the second edge 2101, that is, a protrusion height with respect to the corresponding third edge 2101'.

Then, in the opposite first edge 3101 and third edge 2101 ', the distance projected by the side corresponding to the first edge 3101 in the second opening 310 to the side corresponding to the third edge 2101' in the first opening 210 includes at least three values.

Fig. 4 is a schematic diagram illustrating a relationship between a distance between a first edge and an opposite third edge of a display panel and improvement of light emitting efficiency. Wherein the abscissa in fig. 4 is the distance between the third edge 2101' in the projection of the first opening 210 and the first edge 3101 in the projection of the second opening 310; the ordinate in fig. 4 is the improvement rate of the luminous efficiency of the display panel employing the inventive concept of the present application with respect to the luminous efficiency of the display panel not employing the light extraction structure.

The inventors have actually measured the light emission efficiency of a plurality of display panels having the first opening 210 of the same shape and the second opening 310 of the same shape, in which the distance between the first edge 3101 and the opposite third edge 2101' is different. The projected center point of the first opening 210 is aligned with the projected center point of the second opening 310, and the first shape 210 'is an axisymmetric figure and the second shape 310' is an axisymmetric figure. As shown in fig. 4, the inventors found that when the distance between the first edge 3101 and the opposite third edge 2101' is within a certain range, the light emitting efficiency of the display panel can be effectively improved; and the improvement rate of the luminous efficiency of the display panel has a correlation with the distance between the first edge 3101 and the opposite third edge 2101'. For example, when the distance between the first edge 3101 and the opposite third edge 2101' is set to 0.5 μm, the display panel light emission efficiency is improved by 15%; when the distance between the first edge 3101 and the opposite third edge 2101' is set to be less than 0.5 μm, the distance is gradually decreased, and the rate of increase in the luminous efficiency of the display panel is gradually decreased; when the distance between the first edge 3101 and the opposite third edge 2101' is set to be greater than 0.5 μm, the rate of increase in the luminous efficiency of the display panel gradually decreases as the distance gradually increases.

Fig. 5 is a schematic diagram illustrating a comparison between a display panel provided in the present embodiment and a display panel in the related art, and fig. 6 is a schematic diagram illustrating another comparison between a display panel provided in the present embodiment and a display panel in the related art.

As shown in fig. 5 and 6, the edge of the first opening 210 of the related art display panel is parallel to the edge of the second opening 310. When the projection of the first opening 210 on the substrate base 01 and the projection of the second opening 310 on the substrate base 01 are misaligned along the arrangement direction of the first edge 3101 and the opposite third edge 2101 'due to process errors, the distance from the first edge 3101 to the third edge 2101' in the display panel provided by the embodiment of the present application still includes a plurality of values, and the distance between the edge of the first opening 210 and the edge of the second opening 310 in the display panel in the related art is still single.

The distance between the projected edge of the first opening 210 on the substrate base plate 01 and the projected edge of the second opening 310 on the substrate base plate 01 is designed to ensure that the light extraction efficiency of the display panel is close to the optimum. Since the distance between the edge of the first opening 210 and the edge of the second opening 310 of the display panel in the related art varies due to process errors, the light extraction efficiency of the display panel is greatly changed. In the display panel according to the embodiment of the present application, even if the distance between the first edge 3101 and the opposite third edge 2101' is changed, the distance between the two still includes a plurality of different values, so that the light extraction efficiency of the display panel is not greatly changed.

In the related art, the different distances between the projections of the first opening 210 and the second opening 310 may cause the light extraction efficiency between the display panels produced in different batches to be significantly different. By adopting the inventive concept of the application, the light extraction efficiency of the display panels produced and prepared in different batches is basically not different.

In addition, as shown in fig. 6, in the case that the areas of the second openings 310 are the same, the large misalignment of the first opening 210 and the second opening 310 in the prior art causes the area of the light emitting device 20 overlapping the light extraction structure 30 to be reduced significantly, so that the light extraction effect of the light extraction structure 30 on the light emitting device 20 is reduced; in the embodiment of the present application, the large misalignment between the first opening 210 and the second opening 310 does not cause a significant reduction in the overlapping area between the light emitting device 20 and the light extraction structure 30, thereby ensuring the light extraction effect of the light extraction structure 30 on the light emitting device 20.

In addition, the display panel may further include a pixel circuit layer 04, the pixel circuit layer 04 includes a plurality of pixel circuits 40 therein, and the pixel circuits 40 are electrically connected to the light emitting devices 20 and may provide a light emitting driving current or a light emitting driving voltage to the light emitting devices 20.

It should be noted that, in an actual product, the center point of the first opening 210 and the center point of the second opening 310 may be misaligned in the thickness direction of the display panel. As long as the first opening 210 and the second opening 310 satisfy the description of the above embodiments, even if the first opening 210 and the second opening 310 are misaligned, the display panel and the display device including the same are still within the scope of the present application.

In one embodiment of the present application, the distance between the first edge 3101 and the opposing third edge 2101' is between 0 μm-1.8 μm. Preferably, the distance between the first edge 3101 and the opposing third edge 2101' is between 0 μm-0.5 μm.

In an embodiment of the present application, please refer to fig. 1, fig. 2 and fig. 3, in which the first shape 210 'is a projection of a surface of the first opening 210 far from the substrate base 01 on the substrate base 01, and the second shape 310' is a projection of a surface of the second opening 310 near to the substrate base 01 on the substrate base 01. That is, the shape and area of the first shape 210 'are substantially the same as those of the light emitting surface in the light emitting device 20, and the shape and area of the second shape 310' are substantially the same as those of the receiving surface in the light extraction structure 30 for receiving light.

In one embodiment of the present application, as shown in FIG. 2, at least one first edge 3101 includes at least three points that are consecutive and not equidistant from the opposing second edge 2101. That is, the first edge 3101 includes at least one edge and the opposite second edge 2101 has a continuously varying distance. The first edge 3101 includes at least one segment whose distance from the opposite third edge 2101' is a continuously varying value.

In an implementation manner of this embodiment, as shown in fig. 2, the distance between the first edge 3101 and the opposite third edge 2101' is a continuously changing value, so that when there is a misalignment between the first opening 210 and the second opening 310 along the thickness direction of the display panel, the light extraction efficiency of the display panel can be further prevented from being significantly changed.

Fig. 7 is a schematic projection view of the first opening and the second opening, and fig. 8 is a schematic projection view of the first opening and the second opening.

In one embodiment of the present application, as shown in the schematic projection diagram shown in fig. 7 and the various schematic projection diagrams shown in fig. 8, in a region between any two adjacent and separated intersection points and far from the third shape 210 ", an edge of the second shape 310' is a first edge 3101, and an edge of the third shape 210" opposite to the first edge 3101 is a second edge 2101, and in any first edge 3101 and second edge 2101 which are arranged oppositely, the first edge 3101 includes at least three points with different distances from the second edge 2101. That is, the edges of the second shape 310 ' located between two adjacent and distant intersection points are all the first edges 3101, and the distances from the edges in the third shape 210 ″ opposite thereto all include at least three values, so long as the portions of the edges of the second shape 310 ' that are not parallel to the adjacent edges in the third shape 210 ″ are all the first edges 3101, and the distances from the second shape 210 ' include a plurality of values.

Even if the first opening 210 and the second opening 310 in different display panels are respectively dislocated in multiple directions, the display panel provided by the embodiment of the present application can effectively alleviate the problem that the light emitting efficiency of the display panels is significantly different.

In one implementation manner corresponding to the present embodiment, as shown in fig. 7 and 8, if any two adjacent intersection points of the plurality of intersection points of the third shape 210 ″ and the second shape 310 'are located apart from each other, a portion of the second shape 310' located between any two adjacent intersection points is a first edge 3101, an edge of the third shape 210 ″ is a second edge 2101, and an edge of the first shape 210 'is a third edge 2101'. That is, the distance between the one side of the second opening 310 and the one side of the first opening 210 in parallel to the substrate base 01 is a constantly changing value. The problem that the light extraction efficiency of different display panels is obviously different can be further solved.

In one embodiment of the present application, please refer to fig. 8, the opposing first edge 3101 and second edge 2101 form a fourth shape, and a connection line between two intersection points in the fourth shape is perpendicular to at least one axis of symmetry of the fourth shape.

That is, the fourth shape is an axisymmetric figure, and one axis of symmetry of the fourth shape is collinear with a perpendicular bisector of a line connecting two intersections in the fourth shape. That is, the axis of symmetry of the first edge 3101 is collinear with the perpendicular bisector and the second edge 2101 is collinear with the perpendicular bisector, and further, the axis of symmetry of the third edge 2101' opposite the first edge is also collinear with the perpendicular bisector.

Fig. 9 is another schematic projection view of the first opening and the second opening.

In one embodiment of the present application, referring to fig. 9, the opposing first edge 3101 and second edge 2101 form a fourth shape, and the fourth shape includes a vertex F that is distant from the second edge 2101, i.e., the point of the first edge 3101 that is farthest from the opposing second edge 2101 is the vertex F of the fourth shape, and the two intersection points where the first edge 3101 intersects the opposing second edge 2101 are intersection points D, E.

In the fourth shape, a portion of the first edge 3101 between the vertex F and the intersection point D/E is convex toward the second edge 2101, that is, directed in the direction of the intersection point D/E from the vertex F, and the change in distance between the first edge 3101 and the opposite second edge 2101 gradually slows down. That is, a portion of the first edge 3101 having a small distance from the second edge 2101 is relatively large, and a portion of the first edge 3101 having a small distance from the opposite third edge 2101' is relatively large.

Referring to fig. 9 and fig. 4, when the distance between the first edge 3101 and the third edge 2101 'is less than 0.5 μm, the light-emitting efficiency of the display panel increases faster as the distance between the first edge 3101 and the third edge 2101' increases; when the distance between the first edge 3101 and the third edge 2101 'is greater than 0.5 μm, the improvement of the light extraction efficiency of the display panel is slowed down as the distance between the first edge 3101 and the third edge 2101' increases. In this embodiment, the light extraction efficiency of the display panel can be effectively improved by increasing the proportion of the portion of the first edge 3101 having a smaller distance from the opposing third edge 2101'.

In one embodiment of the present application, as shown in fig. 8 and 9, the first shape 210' is a polygon, and the distance between any one side of the first shape 210 and the first edge 3101 opposite thereto includes at least three values. That is, the distance between the projection of any one side of the first opening 210 on the substrate base 01 and the projection of the opposite side of the second opening 310 on the substrate base includes a plurality of values, so that even if the first opening 210 and the second opening 310 in different display panels are misaligned in a plurality of arbitrary directions, the different light-emitting efficiencies between the display panels will not be significantly different.

As shown in fig. 8 and 9, the first shape 210 'may be a rectangle, and the second shape 310' may be a circle, an octagon, an ellipse, or the like.

Fig. 10 is another schematic projection view of the first opening and the second opening.

In one implementation of the present embodiment, a portion of an edge of the second shape 310 'opposite to one edge of the first shape 210' includes a plurality of protruding structures. That is, the first edge 3101 opposite to one third edge 2101' includes a plurality of convex structures.

Fig. 11 is a schematic view of various projections of the first opening and the second opening.

In one embodiment of the present application, as shown in fig. 11, the edges of the first shapes 210 include curves, and the distance between any one of the curves in the first shapes 210' and the opposite edge of the second shape 310 includes at least three values.

As shown in fig. 11, the first shape 210 'may be a circle, and the second shape 310' may be an ellipse, a diamond, an octagon, a snowflake, etc.

Fig. 12 is a schematic projection view of the first opening and the second opening.

In one implementation of the present embodiment, as shown in FIG. 12, a portion of an edge of the second shape 310 'opposite one of the curves of the first shape 210' includes a plurality of raised structures. That is, the first edge 3101 opposite to one third edge 2101' includes a plurality of convex structures.

An embodiment of the present application provides a display device, as shown in fig. 13, including the display panel 001 according to any one of the embodiments described above. The display device provided by the embodiment of the application can be a mobile phone, and in addition, the display device provided by the embodiment of the application can also be a computer, a television and other display devices.

In the display device provided by the embodiment of the application, when the first opening and the second opening are staggered along the arrangement direction of the first edge and the opposite third edge, because the distance from the first edge to the third edge in the display panel provided by the embodiment of the application still comprises a plurality of values, the light emitting efficiency of the display device cannot be changed too much, and the light emitting efficiency of the display devices produced and prepared in different batches is ensured to be basically not different. In addition, in the display device provided by the embodiment of the application, the risk that the overlapping area of the light emitting device and the light extraction structure is obviously reduced due to the large dislocation of the first opening and the second opening is reduced, and the light extraction effect of the light extraction structure on the light emitting device is ensured.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A display panel, comprising:

a substrate base plate;

a pixel defining layer including a plurality of first openings;

a light emitting material layer disposed within the first opening;

2. The display panel according to claim 1, wherein the first shape is a projection of a surface of the first opening that is far from the base substrate onto the base substrate, and wherein the second shape is a projection of a surface of the second opening that is near to the base substrate onto the base substrate.

3. The display panel according to claim 1, wherein between any two of the intersections adjacent and apart from each other and away from a region of the third shape, an edge of the second shape is the first edge, and an edge of the third shape opposite to the first edge is the second edge;

4. The display panel according to claim 3, wherein any adjacent two of the plurality of intersections of the third shape and the second shape are located apart from each other.

5. The display panel according to claim 1, wherein at least one of the first edges comprises at least three consecutive points that are not the same distance from the opposite second edge.

6. The display panel of claim 1, wherein the first and second opposing edges form a fourth shape; a line connecting the two intersections in the fourth shape is perpendicular to at least one axis of symmetry of the fourth shape.

7. The display panel of claim 1, wherein the first and second opposing edges form a fourth shape; the fourth shape comprises a vertex distal from the second edge; in the fourth shape, a portion of the first edge between the vertex and the intersection is convex toward the second edge.

8. The display panel according to claim 1, wherein the first shape is a polygon, and a distance between any one side of the first shape and the first edge opposite to the one side of the first shape includes at least three values.

9. The display panel according to claim 8, wherein a portion of an edge of the second shape opposite to one edge of the first shape comprises a plurality of convex structures.

10. The display panel according to claim 1, wherein the edges of the first shape comprise curves, and a distance between any curve of the first shape and the opposite edge of the second shape comprises at least three values.

11. The display panel according to claim 10, wherein a portion of the edge of the second shape opposite to one curve of the first shape comprises a plurality of convex structures.

12. A display device characterized by comprising the display panel according to any one of claims 1 to 11.