Display substrate and display apparatus

Abstract

A display substrate and a display apparatus. In the display substrate, the planar shape of each black matrix opening has a first major axis, the dimension of the black matrix opening in the extension direction of the first major axis is the maximum dimension of the black matrix opening, the black matrix opening has a first endpoint and a second endpoint in the extension direction of the first major axis, and the edge of the black matrix opening is divided into a first edge and a second edge by the first endpoint and the second endpoint, the length of the first edge being greater than the length of the second edge; and the planar shape of each pixel opening has a second major axis, the dimension of the pixel opening in the extension direction of the second major axis is the maximum dimension of the pixel opening, the pixel opening has a third endpoint and a fourth endpoint in the extension direction of the second major axis, and the edge of the pixel opening is divided into a third edge and a fourth edge by the third endpoint and the fourth endpoint, the length of the third edge being greater than the length of the fourth edge. Thus, the display substrate can ameliorate the color breakup phenomenon.

Description

Display substrate and display device Technical Field

[0001] This disclosure relates to a display substrate and a display device. Background Technology

[0002] With the continuous development of display technology, organic light-emitting diode (OLED) display devices have gradually become the mainstream display devices due to their advantages such as self-illumination, high color gamut, thinness, high contrast, fast response, low energy consumption, and flexible display.

[0003] Traditional organic light-emitting diode (OLED) displays suffer from reflection and glare issues under ambient light. Therefore, Color Filter on Encapsulation (COE) technology was developed. COE forms a color filter structure on the encapsulation layer of the OLED display, effectively absorbing and scattering ambient light, significantly reducing screen surface reflection and thus minimizing glare. Simultaneously, COE technology also improves light transmittance, resulting in brighter, more detailed images and more accurate color reproduction. Summary of the Invention

[0004] At least one embodiment of this disclosure provides a display substrate, comprising: a substrate; a pixel defining layer located on one side of the substrate; an insulating layer located on the side of the pixel defining layer away from the substrate; and a black matrix layer located on the side of the insulating layer away from the pixel defining layer; the display substrate includes a plurality of sub-pixels, each sub-pixel including a pixel opening located in the pixel defining layer and a black matrix opening located in the black matrix layer, the orthographic projection of the pixel opening on the substrate and the orthographic projection of the black matrix opening on the substrate at least partially overlapping; the planar shape of the black matrix opening has a first major axis, and the dimension of the black matrix opening in the extension direction of the first major axis is... The black matrix opening has a maximum size, and the black matrix opening has a first endpoint and a second endpoint in the extension direction of the first major axis. The edge of the black matrix opening is divided into a first edge and a second edge by the first endpoint and the second endpoint, and the length of the first edge is greater than the length of the second edge. The pixel opening has a planar shape with a second major axis, and the size of the pixel opening in the extension direction of the second major axis is the maximum size of the pixel opening. The pixel opening has a third endpoint and a fourth endpoint in the extension direction of the second major axis, and the edge of the pixel opening is divided into a third edge and a fourth edge by the third endpoint and the fourth endpoint, and the length of the third edge is greater than the length of the fourth edge.

[0005] For example, in a display substrate provided in an embodiment of this disclosure, the plurality of sub-pixels includes a plurality of first color sub-pixels, a plurality of second color sub-pixels, and a plurality of third color sub-pixels. The plurality of first major axes of the plurality of black matrix openings of the plurality of first color sub-pixels include M orientations, where M is a positive integer greater than or equal to 2.

[0006] For example, in a display substrate provided in an embodiment of this disclosure, the plurality of sub-pixels are divided into a plurality of sub-pixel groups, and the plurality of sub-pixel groups are arranged in an array along a first direction and a second direction intersecting the first direction, wherein the angle between the M orientations and the first direction is different.

[0007] For example, in a display substrate provided in one embodiment of this disclosure, the plurality of sub-pixels includes a plurality of minimum repeating units, each of the minimum repeating units includes at least M first color sub-pixels, and the at least M first major axes of the at least M first color sub-pixels include M orientations, wherein M satisfies: M = x 2 Or M = 2x 2 x is a positive integer greater than or equal to 2.

[0008] For example, in a display substrate provided in one embodiment of this disclosure, each sub-pixel group includes one first-color sub-pixel, two second-color sub-pixels, and one third-color sub-pixel. Multiple sub-pixel groups are arranged along a first direction to form sub-pixel group rows. Adjacent sub-pixel group rows are aligned in a second direction. In each sub-pixel group, the first center line connecting the first-color sub-pixel and the third-color sub-pixel intersects with the second center line connecting the two second-color sub-pixels. M satisfies: M = x 2 x is a positive integer greater than or equal to 2.

[0009] For example, in a display substrate provided in one embodiment of this disclosure, each sub-pixel group includes one first-color sub-pixel, two second-color sub-pixels, and one third-color sub-pixel. Multiple sub-pixel groups are arranged along a first direction to form a sub-pixel group row. Adjacent sub-pixel group rows are staggered in a second direction. In each sub-pixel group, the first center line connecting the first-color sub-pixel and the third-color sub-pixel intersects with the second center line connecting the two second-color sub-pixels. Adjacent sub-pixel groups in the first direction have the same arrangement. M satisfies: M = 2x 2 x is a positive integer greater than or equal to 2.

[0010] For example, in a display substrate provided in one embodiment of this disclosure, each sub-pixel group includes a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel. In each sub-pixel group, the center lines connecting the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel form a triangle, and M satisfies: M = x 2 x is a positive integer greater than or equal to 2.

[0011] For example, in a display substrate provided in one embodiment of this disclosure, the plurality of first major axes of the plurality of black matrix openings of the plurality of second color sub-pixels include N orientations, where N is a positive integer greater than or equal to 2.

[0012] For example, in a display substrate provided in one embodiment of this disclosure, the plurality of first major axes of the plurality of black matrix openings of the plurality of third color sub-pixels include K orientations, where K is a positive integer greater than or equal to 2.

[0013] For example, in a display substrate provided in an embodiment of this disclosure, in the sub-pixel, there is a first shortest distance between the orthographic projection of the first endpoint on the substrate and the orthographic projection of the pixel opening on the substrate, a second shortest distance between the orthographic projection of the second endpoint on the substrate and the orthographic projection of the pixel opening on the substrate, and a third shortest distance between the orthographic projection of the first edge on the substrate and the orthographic projection of the pixel opening on the substrate, wherein the third shortest distance is not equal to at least one of the first shortest distance and the second shortest distance.

[0014] For example, in a display substrate provided in one embodiment of this disclosure, there is a fourth shortest distance between the orthographic projection of the second edge on the substrate and the orthographic projection of the pixel opening on the substrate, the fourth shortest distance being unequal to at least one of the first shortest distance and the third shortest distance.

[0015] For example, in a display substrate provided in one embodiment of this disclosure, the first shortest distance and the second shortest distance are equal, while the third shortest distance is not equal to either the first shortest distance or the second shortest distance.

[0016] For example, in a display substrate provided in one embodiment of this disclosure, in the sub-pixel, the orthogonal projection of the pixel opening on the substrate falls into the orthogonal projection of the black matrix opening on the substrate.

[0017] For example, in a display substrate provided in one embodiment of this disclosure, in the sub-pixel, the orthographic projection of the pixel opening on the substrate and the orthographic projection of the black matrix opening on the substrate are tangent at at least one point.

[0018] For example, in a display substrate provided in one embodiment of this disclosure, in the sub-pixel, at least a portion of the orthogonal projection of the first edge or the second edge of the black matrix opening on the substrate coincides with the orthogonal projection of the edge of the pixel opening on the substrate.

[0019] For example, in a display substrate provided in one embodiment of this disclosure, the orthographic projection of the first edge of the black matrix opening on the substrate includes an overlapping portion that overlaps with the orthographic projection of the edge of the pixel opening on the substrate.

[0020] For example, in a display substrate provided in one embodiment of this disclosure, the length of the overlapping portion is greater than 0.1 micrometers.

[0021] For example, in a display substrate provided in one embodiment of this disclosure, in the sub-pixel, at least a portion of the orthogonal projection of the first edge or the second edge of the black matrix opening on the substrate lies within the orthogonal projection of the pixel opening on the substrate.

[0022] For example, in a display substrate provided in one embodiment of this disclosure, the pixel defining layer includes an annular ramp portion surrounding each pixel opening and a pixel defining portion located on the side of the annular ramp portion away from the pixel opening. The thickness of the annular ramp portion in the direction perpendicular to the substrate is less than the average thickness of the pixel defining portion in the direction perpendicular to the substrate. In the sub-pixel, the orthographic projection of the annular ramp portion on the substrate overlaps with the orthographic projection of the first edge or the second edge on the substrate.

[0023] For example, in a display substrate provided in an embodiment of this disclosure, the shape of the orthogonal projection of the black matrix opening in the sub-pixel on the substrate includes an inverted ellipse, the first edge is arc-shaped, the second edge is arc-shaped, and the radius of curvature of the first edge is smaller than the radius of curvature of the second edge.

[0024] For example, in a display substrate provided in one embodiment of this disclosure, the arrangement order of the first edge and the second edge in the sub-pixel is different from the arrangement order of the third edge and the fourth edge.

[0025] For example, in a display substrate provided in one embodiment of this disclosure, the shape of the orthogonal projection of the pixel opening on the substrate includes an inverted ellipse, the third edge is arc-shaped, the fourth edge is arc-shaped, and the radius of curvature of the third edge is smaller than the radius of curvature of the fourth edge.

[0026] For example, in a display substrate provided in an embodiment of this disclosure, each sub-pixel further includes: an anode located between the pixel defining layer and the substrate; an organic light-emitting layer located on the side of the anode away from the substrate; and a cathode located on the side of the organic light-emitting layer away from the anode, wherein the pixel opening exposes at least a portion of the anode, and the organic light-emitting layer is disposed in contact with the anode through the pixel opening.

[0027] At least one embodiment of this disclosure also provides a display substrate, comprising: a substrate; a pixel defining layer located on one side of the substrate; an insulating layer located on the side of the pixel defining layer away from the substrate; and a black matrix layer located on the side of the insulating layer away from the pixel defining layer; the display substrate includes a plurality of sub-pixels, each sub-pixel including a pixel opening located in the pixel defining layer and a black matrix opening located in the black matrix layer, the orthographic projection of the pixel opening on the substrate and the orthographic projection of the black matrix opening on the substrate at least partially overlapping; the planar shape of the black matrix opening has a first major axis, the dimension of the black matrix opening in the extension direction of the first major axis is the maximum dimension of the black matrix opening, and the black matrix opening... The opening has a first endpoint and a second endpoint in the extension direction of the first long axis. The edge of the black matrix opening is divided into a first edge and a second edge by the first endpoint and the second endpoint. The length of the first edge is equal to the length of the second edge. There is a first shortest distance between the orthographic projection of the first endpoint on the substrate and the orthographic projection of the pixel opening on the substrate. There is a second shortest distance between the orthographic projection of the second endpoint on the substrate and the orthographic projection of the pixel opening on the substrate. There is a third shortest distance between the orthographic projection of the first edge on the substrate and the orthographic projection of the pixel opening on the substrate. The third shortest distance is not equal to at least one of the first shortest distance and the second shortest distance.

[0028] For example, in a display substrate provided in an embodiment of this disclosure, the planar shape of the pixel opening has a second major axis, the size of the pixel opening in the extension direction of the second major axis is the maximum size of the pixel opening, the pixel opening has a third endpoint and a fourth endpoint in the extension direction of the second major axis, the edge of the pixel opening is divided into a third edge and a fourth edge by the third endpoint and the fourth endpoint, and the length of the third edge is greater than the length of the fourth edge.

[0029] For example, in a display substrate provided in one embodiment of this disclosure, the shape of the orthogonal projection of the pixel opening on the substrate includes an inverted ellipse, the third edge is arc-shaped, the fourth edge is arc-shaped, and the radius of curvature of the third edge is smaller than the radius of curvature of the fourth edge.

[0030] For example, in a display substrate provided in an embodiment of this disclosure, the planar shape of the pixel opening has a second major axis, the size of the pixel opening in the extension direction of the second major axis is the maximum size of the pixel opening, the pixel opening has a third endpoint and a fourth endpoint in the extension direction of the second major axis, the edge of the pixel opening is divided into a third edge and a fourth edge by the third endpoint and the fourth endpoint, and the length of the third edge and the length of the fourth edge are equal.

[0031] For example, in a display substrate provided in an embodiment of this disclosure, the plurality of sub-pixels includes a plurality of first color sub-pixels, a plurality of second color sub-pixels, and a plurality of third color sub-pixels. The plurality of first major axes of the plurality of black matrix openings of the plurality of first color sub-pixels include M orientations, where M is a positive integer greater than or equal to 2.

[0032] For example, in a display substrate provided in one embodiment of this disclosure, the plurality of sub-pixels includes a plurality of minimum repeating units, each of the minimum repeating units includes at least M first color sub-pixels, and the at least M first major axes of the at least M first color sub-pixels include M orientations, wherein M satisfies: M = x 2 Or M = 2x 2 x is a positive integer greater than or equal to 2.

[0033] At least one embodiment of this disclosure also provides a display device comprising the display substrate described in any of the preceding claims. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure, and are not intended to limit this disclosure.

[0035] Figure 1 is a plan view of a display substrate provided in an embodiment of the present disclosure;

[0036] Figure 2 is a cross-sectional view of a display substrate provided in an embodiment of the present disclosure along the AB section line in Figure 1;

[0037] Figure 3 shows a simulated diffraction comparison between a display substrate provided in an embodiment of the present disclosure and a conventional display substrate;

[0038] Figure 4 is a plan view of another display substrate provided in an embodiment of the present disclosure;

[0039] Figure 5 is a plan view of another display substrate provided in an embodiment of the present disclosure;

[0040] Figure 6 is a plan view of another display substrate provided in an embodiment of the present disclosure;

[0041] Figure 7 is a planar schematic diagram of a pixel opening and a black matrix opening in a sub-pixel according to an embodiment of the present disclosure;

[0042] Figure 8 is a cross-sectional schematic diagram of a sub-pixel provided in an embodiment of the present disclosure;

[0043] Figure 9 illustrates the formation process of an inverted ellipse according to an embodiment of this disclosure;

[0044] Figure 10 is a planar schematic diagram of pixel openings and black matrix openings in another sub-pixel according to an embodiment of the present disclosure;

[0045] Figure 11 is a planar schematic diagram of pixel openings and black matrix openings in another sub-pixel according to an embodiment of the present disclosure;

[0046] Figures 12-15 are schematic planar views of pixel openings and black matrix openings in several other sub-pixels provided in an embodiment of this disclosure;

[0047] Figures 16-17 are planar schematic diagrams of pixel openings and black matrix openings in several other sub-pixels provided in an embodiment of this disclosure;

[0048] Figures 18-20 are schematic planar views of pixel openings and black matrix openings in several other sub-pixels provided in an embodiment of this disclosure;

[0049] Figure 21 is a planar schematic diagram of pixel openings and black matrix openings in another sub-pixel according to an embodiment of the present disclosure;

[0050] Figures 22 and 23 are planar schematic diagrams of pixel openings and black matrix openings in two other types of sub-pixels provided in an embodiment of this disclosure;

[0051] Figures 24-26 are planar schematic diagrams of pixel openings and black matrix openings in three other sub-pixels provided in an embodiment of this disclosure;

[0052] Figure 27 is a planar schematic diagram of pixel openings and black matrix openings in another sub-pixel provided in an embodiment of the present disclosure;

[0053] Figure 28 is a schematic diagram of the structure of a black matrix in a display substrate according to an embodiment of the present disclosure; and

[0054] Figure 29 is a schematic diagram of a display device provided in an embodiment of this disclosure. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the described embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0056] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects.

[0057] In organic light-emitting diode (OLED) display devices employing COE (Chip-on-Earth) technology, the color filter structure on the encapsulation layer typically includes a black matrix layer comprising multiple black matrix openings, within which color filters of different colors are disposed. In this configuration, the black matrix openings allow light corresponding to the colors of the color filters disposed within them to pass through.

[0058] Typically, the black matrix opening is circular, meaning its shape is circular. Alternatively, the black matrix opening may have the same shape as the corresponding pixel opening, for example, by expanding outwards or contracting inwards a certain distance. However, the inventors of this application have noticed that light passing through the black matrix opening causes diffraction, and the entire organic light-emitting display device, when the screen is off, will exhibit color separation due to light diffraction and interference. This means that under white light illumination, the organic display device forms multiple different colored halos, affecting the user experience. It should be noted that within a sub-pixel, the pixel opening and the black matrix opening must be correspondingly positioned. The pixel opening defines the effective light-emitting area of ​​the sub-pixel, and the black matrix opening must overlap with the pixel opening to achieve light emission.

[0059] In this embodiment, a display substrate is provided, comprising a substrate, a pixel defining layer, an insulating layer, and a black matrix layer. The pixel defining layer is located on one side of the substrate. The insulating layer is located on the side of the pixel defining layer away from the substrate. The black matrix layer is located on the side of the insulating layer away from the pixel defining layer. The display substrate includes a plurality of sub-pixels, each sub-pixel including a pixel opening in the pixel defining layer and a black matrix opening in the black matrix layer. The orthographic projection of the pixel opening onto the substrate overlaps with the orthographic projection of the black matrix opening onto the substrate. The planar shape of the black matrix opening has a first major axis, and the dimension of the black matrix opening in the extension direction of the first major axis is the maximum dimension of the black matrix opening. The black matrix opening has a first endpoint and a second endpoint in the extension direction of the first major axis. The edge of the black matrix opening is divided into a first edge and a second edge by the first endpoint and the second endpoint, and the length of the first edge is greater than the length of the second edge. The planar shape of the pixel opening has a second major axis, and the dimension of the pixel opening in the extension direction of the second major axis is the maximum dimension of the pixel opening. The pixel opening has a third endpoint and a fourth endpoint in the extension direction of the second major axis. The edge of the pixel opening is divided into a third edge and a fourth edge by the third endpoint and the fourth endpoint, and the length of the third edge is greater than the length of the fourth edge. As a result, the display substrate changes the planar shape of the black matrix opening, making it less likely for each sub-pixel to form stable interference, thereby improving the color separation phenomenon.

[0060] In some examples, the multiple sub-pixels include multiple first-color sub-pixels, multiple second-color sub-pixels, and multiple third-color sub-pixels. The multiple first major axes of the multiple black matrix openings of the multiple first-color sub-pixels have M orientations, where M is a positive integer greater than or equal to 2. Therefore, by setting the size of the black matrix openings in the extension direction of the first major axis to be larger than the size of the black matrix openings in the extension direction of the first minor axis, and by making the multiple first major axes of the multiple black matrix openings of the multiple first-color sub-pixels have M orientations, the display substrate can make the multiple black matrix openings of the multiple first-color sub-pixels have different orientations. This can disrupt the stable interference between the first-color sub-pixels, blur the color separation aperture, and thus improve the color separation phenomenon.

[0061] At least one embodiment of this disclosure also provides a display device including the display substrate described above. Therefore, this display device also has the technical effect of improving color separation phenomena.

[0062] The display substrate and display device provided in the embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0063] Figure 1 is a plan view of a display substrate according to an embodiment of the present disclosure; Figure 2 is a cross-sectional view of a display substrate according to an embodiment of the present disclosure along the AB section line in Figure 1. It should be noted that, to more clearly illustrate the improvements of the embodiments of the present disclosure, Figure 1 only shows the pixel defining layer and the black matrix layer, omitting other film layers. Unless otherwise defined or stated, these omitted film layers can be referred to in conventional designs.

[0064] As shown in Figures 1 and 2, the display substrate 100 includes a substrate 110, a pixel defining layer 120, an insulating layer 130, and a black matrix layer 140. The pixel defining layer 120 is located on one side of the substrate 110; the insulating layer 130 is located on the side of the pixel defining layer 120 away from the substrate 110; and the black matrix layer 140 is located on the side of the insulating layer 130 away from the pixel defining layer 120. It should be noted that the display substrate 100 may further include: a pixel driving circuit layer 150 and an anode layer 160 located between the substrate 110 and the pixel defining layer 120; and an organic light-emitting layer 170 and a cathode 180 located between the pixel defining layer 120 and the insulating layer 130. The organic light-emitting layer 170 emits light under the driving force of the anode layer 160 and the cathode 180.

[0065] As shown in Figures 1 and 2, the display substrate 100 includes a plurality of sub-pixels 210. Each sub-pixel 210 includes a pixel opening 125 located in the pixel defining layer 120 and a black matrix opening 145 located in the black matrix layer 140. For a sub-pixel 210, the orthographic projection of the pixel opening 125 on the substrate 110 at least partially overlaps with the orthographic projection of the black matrix opening 145 on the substrate 110. During display, light emitted from the organic light-emitting layer 170 in the pixel opening 125 can be emitted through the black matrix opening 145. In the screen-off state, ambient light, after reflection, can also pass through the pixel opening 125 and the black matrix opening 145, resulting in diffraction. Stable interference of the diffracted light can easily lead to color separation.

[0066] As shown in Figures 1 and 2, the planar shape of the black matrix opening 145 has a first major axis A1, and the dimension of the black matrix opening 145 along the extension direction of the first major axis A1 is the maximum dimension of the black matrix opening 145. The black matrix opening 145 has a first endpoint P1 and a second endpoint P2 along the extension direction of the first major axis A1. The edge of the black matrix opening 145 is divided into a first edge E1 and a second edge E2 by the first endpoint P1 and the second endpoint P2, and the length of the first edge E1 is greater than the length of the second edge E2. The planar shape of the pixel opening 125 has a second major axis A3, and the dimension of the pixel opening 125 along the extension direction of the second major axis A3 is the maximum dimension of the pixel opening 125. The pixel opening 125 has a third endpoint P3 and a fourth endpoint P4 along the extension direction of the second major axis A3. The edge of the pixel opening 125 is divided into a third edge E3 and a fourth edge E4 by the third endpoint P3 and the fourth endpoint P4, and the length of the third edge E3 is greater than the length of the fourth edge E4. It should be noted that the planar shape of the black matrix opening described above refers to the shape of the cross-section of the black matrix opening cut by a plane parallel to the substrate; similarly, the planar shape of the pixel opening described above refers to the shape of the cross-section of the pixel opening cut by a plane parallel to the substrate. Furthermore, the first and second major axes described above are only for the convenience of describing the orientation and shape of the black matrix opening and the pixel opening, and do not limit the black matrix opening and the pixel opening to be symmetrical figures.

[0067] In the display substrate provided in this embodiment, the black matrix opening has a first endpoint and a second endpoint along the extension direction of the first major axis. The edge of the black matrix opening is divided into a first edge and a second edge by the first endpoint and the second endpoint, and the length of the first edge is greater than the length of the second edge. The diffracted light generated by the black matrix opening is no longer uniform in all directions, thus allowing reflected light at different azimuth angles to have different phases and intensities, thereby reducing the interference effect with the diffracted light of the pixel opening and improving color separation. Therefore, the display substrate changes the planar shape of the black matrix opening, making it less likely for each sub-pixel to form stable interference, thereby improving color separation. In some examples, as shown in Figures 1 and 2, the planar shape of the black matrix opening 145 also has a first minor axis A2, which is perpendicular to the first minor axis A1; the dimension of the black matrix opening 145 along the extension direction of the first major axis A1 is greater than the dimension of the black matrix opening 145 along the extension direction of the first minor axis A2. For example, the shape of the black matrix opening 145 can be an inverted ellipse, such that the dimension of the black matrix opening along the extension direction of the first major axis is greater than the dimension of the black matrix opening along the extension direction of the first minor axis. Of course, the planar shape of the black matrix opening provided in this embodiment is not limited to the ellipse and inverted ellipse described above.

[0068] As shown in Figures 1 and 2, the plurality of sub-pixels 210 includes a plurality of first-color sub-pixels 210A, a plurality of second-color sub-pixels 210B, and a plurality of third-color sub-pixels 210C. The plurality of first major axes A1 of the plurality of black matrix openings 145 of the plurality of first-color sub-pixels 210A include M orientations, where M is a positive integer greater than or equal to 2. It should be noted that the above-mentioned orientation refers to the direction in which the extension direction of the first major axis points in space. For example, the extension direction of the gate line and the extension direction of the data line in the display substrate can be used as a reference. Different orientations refer to different angles with the extension direction of the gate line or the extension direction of the data line.

[0069] In the display substrate provided in the embodiments of this disclosure, by setting multiple first major axes of multiple black matrix openings of multiple first color sub-pixels to include M orientations, the display substrate can make the multiple black matrix openings of multiple first color sub-pixels have different orientations, thereby disrupting the stable interference between the first color sub-pixels, blurring the color separation aperture, and thus improving the color separation phenomenon.

[0070] For example, M can also be a positive integer greater than or equal to 4, such as 5, 6, 7, 8, 9, etc. As the value of M increases, the display substrate can better disrupt the stable interference between the first color sub-pixels, blur the color separation aperture, and thus improve the color separation phenomenon.

[0071] In some examples, as shown in Figures 1 and 2, the shapes of the black matrix openings 145 of the first color sub-pixel 210A, the second color sub-pixel 210B, and the third color sub-pixel 210C may be the same or similar; however, embodiments of this disclosure include, but are not limited to, the shapes of the black matrix openings 145 of the first color sub-pixel 210A, the second color sub-pixel 210B, and the third color sub-pixel 210C may also be different.

[0072] In some examples, as shown in Figures 1 and 2, the shapes of the pixel openings 125 of the first color sub-pixel 210A, the second color sub-pixel 210B, and the third color sub-pixel 210C may be the same or similar; however, embodiments of this disclosure include, but are not limited to, the shapes of the pixel openings 125 of the first color sub-pixel 210A, the second color sub-pixel 210B, and the third color sub-pixel 210C may also be different.

[0073] For example, the shapes of the pixel openings in the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel can be selected from at least two of the various pixel opening shapes described in the embodiments of this disclosure. For example, the shapes of the pixel openings in the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel can be selected from at least two of the following: inverted ellipse, ellipse, and circle.

[0074] In some examples, as shown in Figures 1 and 2, the insulating layer 130 described above may be an encapsulation layer. Of course, the embodiments of this disclosure include, but are not limited to, other insulating layers.

[0075] In some examples, as shown in FIG2, each sub-pixel 210 further includes: an anode 165 located in an anode layer 160 between a pixel defining layer 120 and a substrate 110; an organic light-emitting layer 170 located on the side of the anode 165 away from the substrate 110; and a cathode 180 located on the side of the organic light-emitting layer 170 away from the anode 165; a pixel opening 125 exposing at least a portion of the anode 165, and the organic light-emitting layer 170 being disposed in contact with the anode 165 through the pixel opening 125.

[0076] It is worth noting that when the display substrate includes sub-pixels of multiple colors, the color separation phenomenon can be improved by using the above-described settings for a single color sub-pixel. Therefore, the color of the first color sub-pixel can be red, green, blue, etc., and is not specifically limited here. However, in order to better improve or even avoid the color separation phenomenon, this disclosure also provides embodiments in which different color sub-pixels all use the above-described first color sub-pixel, for example, the red sub-pixel, green sub-pixel, and blue sub-pixel all use the above-described settings; in these embodiments, the first color sub-pixel can be assigned a specific color.

[0077] In some examples, when the multiple first major axes A1 of the multiple black matrix openings 145 of the multiple first color sub-pixels 210A include M orientations, these M orientations can divide 360 ​​degrees equally, that is, the angle between the M orientations and the first direction X can be 360*i / M degrees, where i is a positive integer greater than or equal to 1 and less than or equal to M. Of course, embodiments of this disclosure include, but are not limited to, that these M orientations may not divide 360 ​​degrees equally. It should be noted that the aforementioned first direction X can be the row direction or column direction of the sub-pixel arrangement, or it can be the extension direction of the gate line or data line in the display substrate.

[0078] For example, when M = 16, the multiple first major axes A1 of the multiple black matrix openings 145 of the multiple first color sub-pixels 210A have 16 orientations. The angles between these 16 orientations and the first direction X can be 0°, 22.5°, 45°, 67.5°, 90°, 112.5°, 135°, 157.5°, 180°, 202.5°, 225°, 247.5°, 270°, 292.5°, 315°, and 337.5°. It should be noted that in this embodiment, the orientations of the first major axes A1 of the two black matrix openings of two adjacent first color sub-pixels are not limited to a difference of 360 / M degrees. For example, when the angles between the M orientations and the first direction X satisfy 360*i / M degrees, i can also be greater than or equal to 0 and less than M.

[0079] In some examples, as shown in Figures 1 and 2, the multiple first major axes A1 of the multiple black matrix openings 145 of the multiple second color sub-pixels 210B include N orientations, where N is a positive integer greater than or equal to 2. That is, in the display substrate provided in this example, the second color sub-pixels also employ a design similar to that of the first color sub-pixels, thereby disrupting the stable interference between the second color sub-pixels, blurring the color separation aperture, and thus improving the color separation phenomenon. It should be noted that the value of N can be equal to or different from the value of M.

[0080] For example, when the first color sub-pixel 210A and the second color sub-pixel 210B both adopt a design with different orientations of the black matrix openings, the first color sub-pixel 210A can be configured to emit one of red light, green light, and blue light, and the second color sub-pixel 210B can be configured to emit another of red light, green light, and blue light.

[0081] In some examples, as shown in Figures 1 and 2, the multiple first major axes A1 of the multiple black matrix openings 145 of the multiple third color sub-pixels 210C include K orientations, where K is a positive integer greater than or equal to 2. That is, in the display substrate provided in this example, the third color sub-pixels also employ a design similar to that of the first color sub-pixels, thereby disrupting stable interference between the third color sub-pixels, blurring the color separation aperture, and thus improving the color separation phenomenon. On the other hand, by employing the above design for all three color sub-pixels, the display substrate can maximize the improvement of the color separation phenomenon. It should be noted that the value of K and the value of M can be equal or unequal.

[0082] For example, when the first color sub-pixel 210A, the second color sub-pixel 210B, and the third color sub-pixel 210C all adopt a design with different orientations of the black matrix openings, the first color sub-pixel 210A can be configured to emit red light, the second color sub-pixel 210B can be configured to emit green light, and the third color sub-pixel 210C can be configured to emit blue light.

[0083] In some examples, as shown in Figures 1 and 2, the aforementioned plurality of sub-pixels 210 can be divided into a plurality of sub-pixel groups 220. Each sub-pixel group 220 includes at least one first-color sub-pixel 210A, at least one second-color sub-pixel 210B, and at least one third-color sub-pixel 210C. The plurality of sub-pixel groups 220 are arranged in an array along a first direction X and a second direction Y intersecting the first direction X. It should be noted that the aforementioned sub-pixel group can be a set of sub-pixels required for the illumination display of one or two pixels; for example, without pixel borrowing, the sub-pixel group can be a single pixel, and with pixel borrowing, the sub-pixel group can include two pixels.

[0084] In some examples, as shown in Figures 1 and 2, within the same sub-pixel group 220, at least two of the first color sub-pixel 210A, the second color sub-pixel 210B, and the third color sub-pixel 210C have different orientations of the first major axis A1 of the black matrix opening 145, thereby improving color separation. Of course, embodiments of this disclosure include, but are not limited to, the orientation of the first major axis of the black matrix opening of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel within the same sub-pixel group may also be the same.

[0085] Figure 3 illustrates a simulated diffraction comparison between a display substrate provided in an embodiment of this disclosure and a conventional display substrate. As shown in Figure 3, by setting the size of the black matrix opening in the extension direction of the first major axis to be larger than the size of the black matrix opening in the extension direction of the first minor axis, and by making the multiple black matrix openings of multiple first color sub-pixels have different orientations, the multiple black matrix openings of multiple second color sub-pixels have different orientations, and the multiple black matrix openings of multiple third color sub-pixels have different orientations, the stable interference between sub-pixels can be disrupted, thereby effectively blurring the color separation aperture, improving the color separation phenomenon, and enhancing the user experience.

[0086] In some examples, as shown in Figures 1 and 2, the aforementioned multiple sub-pixels 210 can be divided into multiple sub-pixel groups 220. Each sub-pixel group 220 includes at least one first-color sub-pixel 210A, at least one second-color sub-pixel 210B, and at least one third-color sub-pixel 210C. The multiple sub-pixel groups 220 are arranged in an array along a first direction X and a second direction Y intersecting the first direction X. The angles between the aforementioned M orientations and the first direction X are different. It should be noted that the aforementioned sub-pixel group can be a set of sub-pixels required for the illumination display of one or two pixels. For example, without pixel borrowing, the sub-pixel group can be a single pixel; with pixel borrowing, the sub-pixel group can include two pixels.

[0087] For example, the first direction X and the second direction Y described above can be perpendicular to each other. Of course, the embodiments disclosed herein include, but are not limited to, the first direction X and the second direction Y described above can also intersect but not be perpendicular.

[0088] In some examples, as shown in Figures 1 and 2, multiple sub-pixels 210 include multiple minimum repeating units 230, each minimum repeating unit 230 including at least M first-color sub-pixels 210A, and the at least M first major axes A1 of the at least M first-color sub-pixels 210A include M orientations. That is, a minimum repeating unit 230 includes first-color sub-pixels 210A with all orientations. In this case, the above M satisfies: M = x 2 Or M = 2x2 x is a positive integer greater than or equal to 2. Therefore, this display substrate can also easily implement the arrangement of first color sub-pixels 210A with M orientations in the smallest repeating unit. It should be noted that the value of M is limited here using the first color sub-pixel as an example. When the second and third color sub-pixels in this embodiment of the present disclosure also adopt a similar design, the values ​​of N and K can also satisfy the above formula, but the values ​​of N and K can be the same as or different from M.

[0089] It should be noted that the number of first color sub-pixels contained in the smallest repeating unit may be greater than or equal to the number of orientations of the first major axis of the black matrix openings of the first color sub-pixels, and the distribution of the first color sub-pixels with different orientations of these black matrix openings in the smallest repeating unit is random, which is not limited in this embodiment.

[0090] In some examples, as shown in FIG1, the display substrate 100 shows only one minimum repeating unit 230. However, in the display substrate 100, multiple minimum repeating units 230 may be arranged in an array along the first direction X and the second direction Y to cover the entire display substrate.

[0091] In some examples, as shown in Figure 1, each minimum repeating unit 230 further includes: at least N second-color sub-pixels 210B, and the at least N first major axes A1 of the at least N second-color sub-pixels 210B include N orientations; and at least K third-color sub-pixels 210C, and the at least K first major axes A1 of the at least K third-color sub-pixels 210C include K orientations. That is, a minimum repeating unit 230 includes first-color sub-pixels 210A with all orientations, second-color sub-pixels 210B with all orientations, and third-color sub-pixels 210C with all orientations.

[0092] In some examples, as shown in Figure 1, each sub-pixel group 220 includes one first-color sub-pixel 210A, two second-color sub-pixels 210B, and one third-color sub-pixel 210C. In each sub-pixel group 220, the first center line CL1 connecting the first-color sub-pixel 210A and the third-color sub-pixel 210C intersects the second center line CL2 connecting the two second-color sub-pixels 210B. Multiple sub-pixel groups 220 are arranged along a first direction to form sub-pixel group rows 250. Adjacent sub-pixel group rows 250 are aligned in the second direction Y, i.e., without misalignment. In this case, the aforementioned M satisfies: M = x 2x is a positive integer greater than or equal to 2. Therefore, this display substrate also facilitates the arrangement of first color sub-pixels with M orientations within a minimum repeating unit having a square shape, thereby better utilizing the area on the display substrate and facilitating driving settings. It should be noted that the center line connecting the sub-pixels in this article refers to the line connecting the geometric centers of the pixel openings of the sub-pixels; when the shape of the pixel opening is irregular, the aforementioned center line connecting the sub-pixels refers to the line connecting the centroids of the pixel openings of the sub-pixels.

[0093] For example, when x = 2, the first major axis of the first color sub-pixel includes 4 orientations; when x = 3, the first major axis of the first color sub-pixel includes 9 orientations; when x = 4, the first major axis of the first color sub-pixel includes 16 orientations; when x = 5, the first major axis of the first color sub-pixel includes 25 orientations; when x = 6, the first major axis of the first color sub-pixel includes 36 orientations; when x = 7, the first major axis of the first color sub-pixel includes 49 orientations; when x = 8, the first major axis of the first color sub-pixel includes 64 orientations; and when x = 9, the first major axis of the first color sub-pixel includes 81 orientations.

[0094] For example, as shown in Figure 1, the first color sub-pixel 210A can be a red sub-pixel, the second color sub-pixel 210B can be a green sub-pixel, and the third color sub-pixel 210C can be a blue sub-pixel. In this case, the multiple sub-pixels of the display substrate adopt a GGRB arrangement. It should be noted that the specific colors of the aforementioned different color sub-pixels can be interchanged, and this embodiment does not impose any limitations on this.

[0095] For example, as shown in Figure 1, the black matrix openings 145 of the first color sub-pixel 210A, the second color sub-pixel 210B, and the third color sub-pixel 210C each have 16 orientations, meaning that the values ​​of M, N, and K mentioned above are all 16. In this case, the minimum repeating unit 230 can include 16 + 16 + 32 = 64 sub-pixels. It should be noted that the number of orientations of the black matrix openings of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel can be different; for example, the black matrix openings of the first color sub-pixel and the second color sub-pixel each have 32 orientations, while the black matrix openings of the third color sub-pixel each have 18 orientations. In some examples, as shown in Figure 1, multiple sub-pixel groups 220 are arranged in an array along the first direction X and the second direction Y; the angle between the first center line CL1 of the sub-pixel group 220 and the first direction X ranges from 30 to 60 degrees.

[0096] In some examples, as shown in Figure 1, in each sub-pixel group 220, the first color sub-pixel 210A and the first of the two second color sub-pixels 210B are arranged along the first direction X, and the third color sub-pixel 210C and the second of the two second color sub-pixels 210B are also arranged along the first direction X; at the same time, the first color sub-pixel 210A and the second of the two second color sub-pixels 210B are arranged along the second direction Y, and the third color sub-pixel 210C and the first of the two second color sub-pixels 210B are also arranged along the second direction Y.

[0097] In some examples, as shown in Figure 1, the sub-pixels within two adjacent sub-pixel groups 220 in the first direction X have the same arrangement orientation; that is, the relative positional relationship between the first color sub-pixel 210A, the second color sub-pixel 210B, and the third color sub-pixel 210C within two adjacent sub-pixel groups 220 in the first direction X is the same. Similarly, the sub-pixels within two adjacent sub-pixel groups 220 in the second direction Y also have the same arrangement orientation; that is, the relative positional relationship between the first color sub-pixel 210A, the second color sub-pixel 210B, and the third color sub-pixel 210C within two adjacent sub-pixel groups 220 in the second direction Y is the same.

[0098] In some examples, as shown in Figure 1, the plurality of subpixels 210 include a plurality of alternating first subpixel rows 211 and a plurality of second subpixel rows 212; the first subpixel rows 211 include alternating second color subpixels 210B and third color subpixels 210C; and the second subpixel rows 212 include alternating second color subpixels 210B and first color subpixels 210A.

[0099] Figure 4 is a planar schematic diagram of another display substrate provided in an embodiment of the present disclosure. As shown in Figure 4, each sub-pixel group 220 includes a first color sub-pixel 210A, two second color sub-pixels 210B, and a third color sub-pixel 210C; the multiple sub-pixel groups 220 are arranged along the first direction X to form a sub-pixel group row 250, and two adjacent sub-pixel group rows 250 in the second direction Y are staggered. For example, the staggered arrangement of two adjacent sub-pixel group rows 250 in the second direction Y can be staggered by 1 / 2 pitch, and the above-mentioned pitch can be the distance between sub-pixels of the same color in two adjacent sub-pixel groups in the first direction X.

[0100] As shown in Figure 4, in each sub-pixel group 220, the first center line CL1 connecting the first color sub-pixel 210A and the third color sub-pixel 210C intersects with the second center line CL2 connecting the two second color sub-pixels 210. In this case, the above-mentioned M satisfies: M = 2x 2x is a positive integer greater than or equal to 2. Therefore, this display substrate also facilitates the arrangement of first color sub-pixels with M orientations within a minimum repeating unit having a square shape, thereby better utilizing the area on the display substrate and simplifying driving settings.

[0101] It should be noted that the value of M is limited here by taking the first color sub-pixel as an example. When the second color sub-pixel and the third color sub-pixel of this embodiment of the present disclosure also adopt a similar design, the values ​​of N and K mentioned above can also satisfy the above formula, but the values ​​of N and K can be the same as or different from M.

[0102] For example, when x = 2, the first major axis of the first color sub-pixel includes 8 orientations; when x = 3, the first major axis of the first color sub-pixel includes 18 orientations; when x = 4, the first major axis of the first color sub-pixel includes 32 orientations; when x = 5, the first major axis of the first color sub-pixel includes 50 orientations; when x = 6, the first major axis of the first color sub-pixel includes 72 orientations; when x = 7, the first major axis of the first color sub-pixel includes 98 orientations; when x = 8, the first major axis of the first color sub-pixel includes 128 orientations; and when x = 9, the first major axis of the first color sub-pixel includes 162 orientations.

[0103] For example, as shown in Figure 4, the first color sub-pixel 210A can be a red sub-pixel, the second color sub-pixel 210B can be a green sub-pixel, and the third color sub-pixel 210C can be a blue sub-pixel. In this case, the multiple sub-pixels of the display substrate adopt a GGRB arrangement. It should be noted that the specific colors of the aforementioned different color sub-pixels can be interchanged, and this embodiment does not impose any limitations on this.

[0104] For example, as shown in Figure 4, the black matrix openings 145 of the first color sub-pixel 210A, the second color sub-pixel 210B, and the third color sub-pixel 210C each have 18 orientations, meaning that the values ​​of M, N, and K mentioned above are all 18. In this case, the minimum repeating unit 230 mentioned above can include 18 + 18 + 36 = 72 sub-pixels. It should be noted that the number of orientations of the black matrix openings of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel can be different; for example, the black matrix openings of the first color sub-pixel and the second color sub-pixel each have 32 orientations, while the black matrix openings of the third color sub-pixel each have 18 orientations. In some examples, as shown in Figure 4, multiple sub-pixel groups 220 are arranged in an array along the first direction X and the second direction Y; the first center line CL1 in the sub-pixel group 220 can extend approximately along the first direction X or the second direction Y; for example, the angle between the extension direction of the first center line CL1 in the sub-pixel group 220 and the first direction X or the second direction Y is less than 5 degrees. For example, as shown in Figure 3, the first center line CL1 in the sub-pixel group 220 extends approximately along the first direction X.

[0105] In some examples, as shown in Figure 4, the plurality of subpixels 210 include a plurality of alternating third subpixel rows 213 and a plurality of fourth subpixel rows 214; the third subpixel rows 213 include alternating first color subpixels 210A and third color subpixels 210C; and the fourth subpixel rows 214 include alternating second color subpixels 210B.

[0106] In some examples, as shown in Figure 4, two adjacent sub-pixel groups 220 in the second direction Y are misaligned, that is, two adjacent sub-pixel groups 220 in the second direction Y are not aligned, but are misaligned by a certain distance in the first direction X.

[0107] Figure 5 is a planar schematic diagram of another display substrate provided in an embodiment of this disclosure. As shown in Figure 5, each sub-pixel group 220 includes a first color sub-pixel 210A, a second color sub-pixel 210B, and a third color sub-pixel 210C; in each sub-pixel group 220, the center lines connecting the first color sub-pixel 210A, the second color sub-pixel 210B, and the third color sub-pixel 210C form a triangle. The sub-pixels in two adjacent sub-pixel groups 220 in the first direction X are arranged in the same way, that is, the relative positional relationship between the first color sub-pixel 210A, the second color sub-pixel 210B, and the third color sub-pixel 210C in two adjacent sub-pixel groups 220 in the first direction X is the same. In this case, the above-mentioned M satisfies: M = x 2x is a positive integer greater than or equal to 2. Therefore, this display substrate also facilitates the arrangement of first color sub-pixels with M orientations within a minimum repeating unit having a square shape, thereby better utilizing the area on the display substrate and simplifying driving settings.

[0108] It should be noted that the value of M is limited here by taking the first color sub-pixel as an example. When the second color sub-pixel and the third color sub-pixel of this embodiment of the present disclosure also adopt a similar design, the values ​​of N and K mentioned above can also satisfy the above formula, but the values ​​of N and K can be the same as or different from M.

[0109] For example, when x = 2, the first major axis of the first color sub-pixel includes 8 orientations; when x = 3, the first major axis of the first color sub-pixel includes 18 orientations; when x = 4, the first major axis of the first color sub-pixel includes 32 orientations; when x = 5, the first major axis of the first color sub-pixel includes 50 orientations; when x = 6, the first major axis of the first color sub-pixel includes 72 orientations; when x = 7, the first major axis of the first color sub-pixel includes 98 orientations; when x = 8, the first major axis of the first color sub-pixel includes 128 orientations; and when x = 9, the first major axis of the first color sub-pixel includes 162 orientations.

[0110] For example, as shown in Figure 5, the first color sub-pixel 210A can be a red sub-pixel, the second color sub-pixel 210B can be a green sub-pixel, and the third color sub-pixel 210C can be a blue sub-pixel. In this case, the multiple sub-pixels of the display substrate adopt a Real RGB arrangement. It should be noted that the specific colors of the aforementioned different color sub-pixels can be interchanged, and this embodiment does not impose any limitations on this.

[0111] For example, as shown in Figure 5, the black matrix openings 145 of the first color sub-pixel 210A, the second color sub-pixel 210B, and the third color sub-pixel 210C each have 16 orientations, meaning that the values ​​of M, N, and K mentioned above are all 16. In this case, the minimum repeating unit 230 can include 16 + 16 + 16 = 48 sub-pixels. It should be noted that the number of orientations of the black matrix openings of the first, second, and third color sub-pixels can be different; for example, the first and second color sub-pixels may each have 32 orientations, while the third color sub-pixel may have 18 orientations.

[0112] In some examples, as shown in Figure 5, in each sub-pixel group 220, the first color sub-pixel 210A and the second color sub-pixel 210B are arranged along the second direction Y, and the whole formed by the first color sub-pixel 210A and the second color sub-pixel 210B is arranged with the third color sub-pixel 210C along the first direction X.

[0113] In some examples, as shown in Figure 5, multiple first color sub-pixels 210A are arranged along the first direction X to form a first color sub-pixel row 215, multiple second color sub-pixels 210B are arranged along the first direction X to form a second color sub-pixel row 216, and multiple third color sub-pixels 210C are arranged along the first direction X to form a third color sub-pixel row 217; the third color sub-pixel row 217 is located between adjacent first color sub-pixel rows 215 and second color sub-pixel rows 216.

[0114] Figure 6 is a planar schematic diagram of another display substrate provided in an embodiment of this disclosure. As shown in Figure 6, each sub-pixel group 220 includes a first color sub-pixel 210A, a second color sub-pixel 210B, and a third color sub-pixel 210C; in each sub-pixel group 220, the center lines connecting the first color sub-pixel 210A, the second color sub-pixel 210B, and the third color sub-pixel 210C form a triangle; in two adjacent sub-pixel groups 220 in the first direction X, the arrangement order of the first color sub-pixel 210A and the third color sub-pixel 210C is opposite; that is, in one of the two adjacent sub-pixel groups 220 in the first direction X, the first color sub-pixel 210A and the third color sub-pixel 210C are arranged from top to bottom in the second direction Y, while in the other of the two adjacent sub-pixel groups 220 in the first direction X, the first color sub-pixel 210A and the third color sub-pixel 210C are arranged from bottom to top in the second direction Y. In this case, the above-mentioned M satisfies: M = x 2 x is a positive integer greater than or equal to 2. Therefore, this display substrate also facilitates the arrangement of first color sub-pixels with M orientations within a minimum repeating unit having a square shape, thereby better utilizing the area on the display substrate and simplifying driving settings.

[0115] It should be noted that the value of M is limited here by taking the first color sub-pixel as an example. When the second color sub-pixel and the third color sub-pixel of this embodiment of the present disclosure also adopt a similar design, the values ​​of N and K mentioned above can also satisfy the above formula, but the values ​​of N and K can be the same as or different from M.

[0116] For example, when x = 2, the first major axis of the first color sub-pixel includes 8 orientations; when x = 3, the first major axis of the first color sub-pixel includes 18 orientations; when x = 4, the first major axis of the first color sub-pixel includes 32 orientations; when x = 5, the first major axis of the first color sub-pixel includes 50 orientations; when x = 6, the first major axis of the first color sub-pixel includes 72 orientations; when x = 7, the first major axis of the first color sub-pixel includes 98 orientations; when x = 8, the first major axis of the first color sub-pixel includes 128 orientations; and when x = 9, the first major axis of the first color sub-pixel includes 162 orientations.

[0117] For example, as shown in Figure 6, the first color sub-pixel 210A can be a red sub-pixel, the second color sub-pixel 210B can be a green sub-pixel, and the third color sub-pixel 210C can be a blue sub-pixel. In this case, the multiple sub-pixels of the display substrate adopt a Real RGB arrangement. It should be noted that the specific colors of the different color sub-pixels described above can be interchanged, and this embodiment does not impose any limitations on this.

[0118] For example, as shown in Figure 6, the black matrix openings 145 of the first color sub-pixel 210A, the second color sub-pixel 210B, and the third color sub-pixel 210C each have 16 orientations, meaning that the values ​​of M, N, and K mentioned above are all 16. In this case, the minimum repeating unit 230 can include 16 + 16 + 16 = 48 sub-pixels. It should be noted that the number of orientations of the black matrix openings of the first, second, and third color sub-pixels can be different; for example, the first and second color sub-pixels may each have 32 orientations, while the third color sub-pixel may have 18 orientations.

[0119] In some examples, as shown in Figure 6, in each sub-pixel group 220, the first color sub-pixel 210A and the second color sub-pixel 210B are arranged along the first direction X, and the whole formed by the first color sub-pixel 210A and the second color sub-pixel 210B and the third color sub-pixel 210C are arranged along the second direction Y.

[0120] In some examples, as shown in Figure 6, the second color sub-pixel 210B, the first color sub-pixel 210A, and the third color sub-pixel 210C are arranged alternately in the first direction X to form a sub-pixel row, and adjacent sub-pixel rows are staggered in the second direction Y.

[0121] To better improve or even eliminate color separation in the display substrate when the screen is off, embodiments of this disclosure also improve the relative positional relationship, shape, and size of the black matrix opening and the pixel opening. These improvements will be described in detail below with reference to the accompanying drawings.

[0122] Figure 7 is a planar schematic diagram of the pixel opening and black matrix opening in a sub-pixel according to an embodiment of the present disclosure. The sub-pixel shown in Figure 7 can be a planar schematic diagram of a sub-pixel in any of the display substrates provided in Figures 1 to 6.

[0123] As shown in Figure 7, in sub-pixel 210, the black matrix opening 145 has a first endpoint P1 and a second endpoint P2 extending along the first major axis A1. The edge of the black matrix opening 145 is divided into a first edge E1 and a second edge E2 by the first endpoint P1 and the second endpoint P2, and the length of the first edge E1 is greater than the length of the second edge E2. That is, the black matrix opening 145 not only has a major axis, but its first edge E1 and second edge E2 also have different lengths. This results in different diffraction effects of light not only in the two axial directions of the black matrix opening 145, but also in the diffraction effects produced by light at the first edge E1 and the second edge E2 of the black matrix opening 145. Therefore, by setting the black matrix openings of sub-pixels of the same color to have different orientations, stable interference between diffracted light from sub-pixels of the same color can be disrupted. It should be noted that the main diffraction effect of light diffracting at the black matrix opening is attributed to the edge of the black matrix opening. Therefore, the diffraction effect at the edge of the black matrix opening plays a dominant role in forming the final diffraction pattern.

[0124] As shown in Figure 7, the orthographic projection of the first endpoint P1 on the substrate 110 and the orthographic projection of the pixel opening 125 on the substrate 110 have a first shortest distance D1; the orthographic projection of the second endpoint P2 on the substrate 110 and the orthographic projection of the pixel opening 125 on the substrate 110 have a second shortest distance D2; the orthographic projection of the first edge E1 of the black matrix opening 145 on the substrate 110 and the orthographic projection of the pixel opening 125 on the substrate 110 have a third shortest distance D3. The third shortest distance D3 is not equal to at least one of the first shortest distance D1 and the second shortest distance D2. Therefore, since the third shortest distance D3 is not equal to at least one of the first shortest distance D1 and the second shortest distance D2, the diffracted light generated by the ambient light at the pixel opening 125 and the black matrix opening 145 cannot form stable interference, thereby improving the color separation phenomenon. In other words, the pixel opening and black matrix opening with the above configuration can disrupt the stable interference of the diffracted light generated by the pixel opening and the black matrix opening, thereby improving the color separation phenomenon.

[0125] In some examples, the third shortest distance D3 is not equal to either the first shortest distance D1 or the second shortest distance D2, which can better improve color separation.

[0126] In some examples, as shown in Figure 7, the orthographic projection of the second edge E2 of the black matrix opening 145 onto the substrate 110 has a fourth shortest distance D4 between it and the orthographic projection of the pixel opening 125 onto the substrate 110. This fourth shortest distance D4 is not equal to at least one of the first shortest distance D1 and the second shortest distance D2. Therefore, the display substrate can further improve color separation.

[0127] In some examples, as shown in Figure 7, the first shortest distance D1 and the second shortest distance D2 are equal. Therefore, the display substrate improves color separation while exhibiting better display performance. Of course, embodiments of this disclosure include, but are not limited to, the first shortest distance D1 and the second shortest distance D2 may not be equal.

[0128] In some examples, as shown in Figure 7, the values ​​of the first shortest distance D1 and the second shortest distance D2 mentioned above are both greater than 0.

[0129] In some examples, as shown in FIG7, in sub-pixel 210, at least a portion of the orthographic projection of the first edge E1 or the second edge E2 of the black matrix opening 145 onto the substrate 110 coincides with the orthographic projection of the edge of the pixel opening 125 onto the substrate 110. That is, the aforementioned third shortest distance D3 or fourth shortest distance D4 is 0. In this case, the display substrate can effectively and to a large extent disrupt the stable interference of diffracted light generated by the pixel opening and the black matrix opening, thereby improving color separation. In some examples, as shown in FIG7, in sub-pixel 210, at least a portion of the orthographic projection of the first edge E1 of the black matrix opening 145 onto the substrate 110 coincides with the orthographic projection of the edge of the pixel opening 125 onto the substrate 110. That is, the aforementioned third shortest distance D3 is 0.

[0130] In some examples, the value of the fourth shortest distance D4 can be zero if at least a portion of the orthographic projection of the second edge of the black matrix opening onto the substrate coincides with the orthographic projection of the edge of the pixel opening onto the substrate.

[0131] In some examples, at least a portion of the orthographic projections of the first and second edges of the black matrix opening onto the substrate may also coincide with the orthographic projections of the edges of the pixel opening onto the substrate, that is, the aforementioned third shortest distance D3 and the aforementioned fourth shortest distance D4 are both zero.

[0132] In some examples, as shown in Figure 7, the orthographic projection of the first edge E1 of the black matrix opening 145 onto the substrate 110 includes an overlapping portion that overlaps with the orthographic projection of the edge of the pixel opening 125 onto the substrate 110. That is, at least a portion of the orthographic projection of the first edge E1 of the black matrix opening 145 onto the substrate 110 coincides with the orthographic projection of the edge of the pixel opening 125 onto the substrate 110. Since the first edge E1 is relatively long, its curvature is closer to that of the edge of the pixel opening. Therefore, the length of the overlapping portion of the first edge E1 can be increased, thereby significantly disrupting the stable interference of the diffracted light generated by the pixel opening and the black matrix opening, and thus improving color separation.

[0133] In some examples, the length of the overlapping portion described above is greater than 0.1 micrometers. For example, the length of the overlapping portion described above may be greater than 0.5 micrometers, 1 micrometer, or 2 micrometers.

[0134] It is worth noting that, in this paper, the edge of the black matrix opening (including the first edge and the second edge) can be the annular region between the outermost boundary of the black matrix opening and the boundary formed by the inward reduction of Q micrometers from the center of the black matrix opening. The value of Q can be 0.1 micrometers to 0.2 micrometers, for example, 0.1 micrometers or 0.2 micrometers. Similarly, the edge of the pixel opening can also be the annular region between the outermost boundary of the pixel opening and the boundary formed by the inward reduction of P micrometers from the center of the pixel opening. The value of P can be 0.1 micrometers to 0.2 micrometers, for example, 0.1 micrometers or 0.2 micrometers.

[0135] Figure 8 is a cross-sectional schematic diagram of a sub-pixel according to an embodiment of this disclosure. As shown in Figure 8, due to manufacturing process limitations, the pixel opening 125 cannot be formed as a completely straight up-down opening (i.e., the sidewall of the pixel opening 125 is not perpendicular to the substrate 110). Therefore, there is an annular ramp portion 126 on the outside of the pixel opening. In this case, the pixel defining layer 120 includes the annular ramp portion 126 surrounding each pixel opening 125 and a pixel defining portion 127 located on the side of the annular ramp portion 126 away from the pixel opening 125; the thickness of the annular ramp portion 126 in the direction perpendicular to the substrate 110 is less than the average thickness of the pixel defining portion 127 in the direction perpendicular to the substrate 110. In this situation, the cathode 180 on the annular ramp portion 126 will directionally reflect light, and this reflected light is also one of the causes of color separation.

[0136] For example, as shown in FIG8, the thickness of the annular slope portion 126 gradually decreases in the direction perpendicular to the substrate 110 from the pixel limiting portion 127 to the center of the pixel opening 125.

[0137] In some examples, as shown in FIG8, in sub-pixel 210, the orthographic projection of the annular ramp portion 126 on the substrate 110 overlaps with the orthographic projection of the first edge E1 or the second edge E2 of the black matrix opening 145 on the substrate 110. In this case, the black matrix layer 140 can partially block the annular ramp portion 126, thereby further improving the color separation phenomenon.

[0138] Referring again to sub-pixel 210 shown in Figure 7, since the orthographic projection of the first edge E1 of the black matrix opening 145 on the substrate 110 includes an overlapping portion that overlaps with the orthographic projection of the edge of the pixel opening 125 on the substrate 110, the orthographic projection of the annular slope portion 126 on the substrate 110 overlaps with the orthographic projection of the first edge E1 of the black matrix opening 145 on the substrate 110, thereby further improving the color separation phenomenon. It should be noted that at the location of the overlapping portion of the first edge, the black matrix layer can completely block the corresponding annular slope portion, and on both sides of the overlapping portion of the first edge in the extension direction of the first major axis A1, the black matrix layer can partially block the corresponding annular slope portion.

[0139] In some examples, as shown in Figure 7, in sub-pixel 210, the orthographic projection of the black matrix opening 145 onto the substrate 110 includes an inverted ellipse. The first edge E1 and the second edge E2 of the black matrix opening 145 are both arc-shaped, and the radius of curvature of the first edge E1 is smaller than that of the second edge E2. Therefore, the radius of curvature of the first edge E1 is closer to that of the pixel opening 125.

[0140] Figure 9 illustrates the formation process of an inverted ellipse according to an embodiment of this disclosure. As shown in Figure 9, the inverted ellipse in this embodiment refers to the shape formed by chamfering, for example, rounding, the edge of the circle 10, i.e., after cutting off a crescent shape 20 from the circle 10. The radius of curvature of the chamfered edge 12 will increase. It should be noted that the embodiments of this disclosure include, but are not limited to, this; the inverted ellipse described above can also be formed by splicing two ellipses, for example, by splicing a part of one ellipse with a part of another ellipse.

[0141] In some examples, as shown in Figure 7, in sub-pixel 210, the planar shape of pixel opening 125 also has a second minor axis A4, and the dimension of pixel opening 125 in the extension direction of the second major axis A3 is larger than the dimension of pixel opening 125 in the extension direction of the second minor axis A4. Therefore, the diffraction effect produced by ambient light in the extension direction of the second major axis of the pixel opening is different from the diffraction effect produced in the diffraction direction of the second minor axis.

[0142] In some examples, as shown in Figure 7, the pixel opening 125 has a third endpoint P3 and a fourth endpoint P4 extending along the second major axis A3. The edge of the pixel opening 125 is divided into a third edge E3 and a fourth edge E4 by the third endpoint P3 and the fourth endpoint P4, with the length of the third edge E3 being greater than the length of the fourth edge E4. That is, the pixel opening 125 not only has a major axis, but its third edge E3 and fourth edge E4 also have different lengths. This results in different diffraction effects not only in the two axial directions of the pixel opening 125, but also at the third edge E3 and the fourth edge E4 of the pixel opening 125. In this case, setting the pixel openings of sub-pixels of the same color to have different orientations can disrupt the stable interference between diffracted light from the same color sub-pixel. It should be noted that the main diffraction effect of light diffracting at the pixel opening is attributed to the edge of the pixel opening; therefore, the diffraction effect at the edge of the pixel opening plays a dominant role in forming the final diffraction pattern.

[0143] It is worth noting that although the third edge E3 and the fourth edge E4 of the shape of the pixel opening 125 in FIG7 are not equal, embodiments of this disclosure include, but are not limited to, the third edge E3 and the fourth edge E4 of the shape of the pixel opening 125 can be equal. For example, the planar shape of the pixel opening 125 can be circular or elliptical.

[0144] For example, when the third edge E3 and the fourth edge E4 of the pixel opening shape are equal, the third edge E3 and the fourth edge E4 can be symmetrical with respect to the second major axis; if the third edge E3 and the fourth edge E4 of the pixel opening shape are not equal, the third edge E3 and the fourth edge E4 are asymmetrical with respect to the second major axis.

[0145] In some examples, as shown in Figure 7, in sub-pixel 210, the arrangement order of the first edge E1 and the second edge E2 of the black matrix opening 145 is reversed compared to the arrangement order of the third edge E3 and the fourth edge E4 of the pixel opening 125. For example, the first edge E1 and the second edge E2 of the black matrix opening 145 are arranged from left to right, while the third edge E3 and the fourth edge E4 of the pixel opening 125 are arranged from right to left. Thus, with this arrangement, while the black matrix openings have different orientations, the pixel openings also have correspondingly different orientations, thereby greatly improving color separation. On the other hand, by making the arrangement order of the first edge E1 and the second edge E2 of the black matrix opening 145 reversed compared to the arrangement order of the third edge E3 and the fourth edge E4 of the pixel opening 125, the display device can also make the shape and distance of the gap between the first edge E1 and the fourth edge E4 different from the shape and distance of the gap between the second edge E2 and the third edge E3, thereby better disrupting the stable interference between the diffracted light of the black matrix opening and the diffracted light of the pixel opening.

[0146] For example, as shown in Figure 7, the first edge E1 of the black matrix opening 145 and the fourth edge E4 of the pixel opening 125 are on the same side, and the second edge E2 of the black matrix opening 145 and the third edge E3 of the pixel opening 125 are on the same side.

[0147] In some examples, as shown in Figure 7, the orthographic projection of the pixel opening 125 onto the substrate 110 includes an inverted ellipse, with both the third edge E3 and the fourth edge E4 being arc-shaped, and the radius of curvature of the third edge E3 being smaller than that of the fourth edge E4. It should be noted that the aforementioned inverted ellipse can be obtained as shown in Figure 9.

[0148] In some examples, as shown in Figure 7, the ratio of the distance between the third endpoint P3 and the fourth endpoint P4 to the distance between the first endpoint P1 and the second endpoint P2 in sub-pixel 210 ranges from 0.5 to 0.9. This configuration improves color separation while also accommodating the process requirements and the need for close arrangement of sub-pixels, thus avoiding impacting the resolution and display effect of the display device.

[0149] In some examples, as shown in Figure 7, in sub-pixel 210, the length of the first major axis A1 of the black matrix opening 145 is greater than the length of the second major axis A3 of the pixel opening 125; the first major axis A1 of the black matrix opening 145 is located on the side of the second major axis A3 of the pixel opening 125 near the third edge E3; that is, the first major axis A1 of the black matrix opening 145 is located to the right of the second major axis A3 of the pixel opening 125.

[0150] In some examples, as shown in Figure 7, the first major axis A1 of the black matrix opening 145 is parallel to the second major axis A3 of the pixel opening 125; the first minor axis A2 of the black matrix opening 145 is parallel to or overlaps with the second minor axis A4 of the pixel opening 125.

[0151] In some examples, as shown in Figure 7, the radius of curvature of the first edge E1 of the black matrix opening 145 is greater than the radius of curvature of the third edge E3 of the pixel opening 125. The radius of curvature of the first edge E1 of the black matrix opening 145 may be greater than, equal to, or less than the radius of curvature of the fourth edge E4 of the pixel opening 125.

[0152] Figure 10 is a planar schematic diagram of the pixel opening and black matrix opening in another sub-pixel according to an embodiment of this disclosure. The sub-pixels in any of the display substrates provided in Figures 1 to 6 can also adopt the related design of pixel opening and black matrix opening as shown in Figure 10.

[0153] As shown in Figure 10, similarly, the black matrix opening 145 has a first endpoint P1 and a second endpoint P2 extending along the first major axis A1. The edge of the black matrix opening 145 is divided into a first edge E1 and a second edge E2 by the first endpoint P1 and the second endpoint P2, respectively. The length of the first edge E1 is greater than the length of the second edge E2. In other words, the black matrix opening 145 not only has a major axis, but its first edge E1 and second edge E2 also have different lengths. This results in different diffraction effects of light not only in the two axial directions of the black matrix opening 145, but also in the diffraction effects produced by light at the first edge E1 and the second edge E2 of the black matrix opening 145. Therefore, by setting the black matrix openings of the same color sub-pixel to have different orientations, stable interference between diffracted light from the same color sub-pixel can be disrupted. It is worth noting that the distance between the first endpoint P1 and the second endpoint P2 of the aforementioned black matrix opening 145 can be the maximum size of the black matrix opening 145.

[0154] As shown in Figure 10, similarly, the orthographic projection of the first endpoint P1 on the substrate 110 and the orthographic projection of the pixel opening 125 on the substrate 110 have a first shortest distance D1; the orthographic projection of the second endpoint P2 on the substrate 110 and the orthographic projection of the pixel opening 125 on the substrate 110 have a second shortest distance D2; the orthographic projection of the first edge E1 of the black matrix opening 145 on the substrate 110 and the orthographic projection of the pixel opening 125 on the substrate 110 have a third shortest distance D3, and the third shortest distance D3 is not equal to at least one of the first shortest distance D1 and the second shortest distance D2. Therefore, the diffracted light generated by the ambient light at the pixel opening 125 and the black matrix opening 145 cannot form stable interference, thereby improving the color separation phenomenon. In other words, the pixel opening and black matrix opening with the above configuration can disrupt the stable interference of the diffracted light generated by the pixel opening and the black matrix opening, thereby also improving the color separation phenomenon.

[0155] In some examples, as shown in Figure 10, the third shortest distance D3 is not equal to the first shortest distance D1 and the second shortest distance D2, which can better improve the color separation phenomenon.

[0156] In some examples, as shown in Figure 10, similarly, the orthographic projection of the second edge E2 of the black matrix opening 145 onto the substrate 110 has a fourth shortest distance D4 between it and the orthographic projection of the pixel opening 125 onto the substrate 110. This fourth shortest distance D4 is not equal to at least one of the first shortest distance D1 and the second shortest distance D2. Therefore, the display substrate can further improve color separation.

[0157] In some examples, as shown in Figure 10, the fourth shortest distance D4 is not equal to the first shortest distance D1 and the second shortest distance D2, which can better improve the color separation phenomenon.

[0158] In some examples, as shown in Figure 10, the first shortest distance D1 and the second shortest distance D2 are equal. Therefore, the display substrate improves color separation while exhibiting better display performance. Of course, embodiments of this disclosure include, but are not limited to, the first shortest distance D1 and the second shortest distance D2 may not be equal.

[0159] In some examples, as shown in Figure 10, the third shortest distance D3 and the fourth shortest distance D4 are not equal. Of course, embodiments of this disclosure include, but are not limited to, the third shortest distance D3 and the fourth shortest distance D4 may also be equal.

[0160] In some examples, as shown in Figure 10, the values ​​of the first shortest distance D1, the second shortest distance D2, the third shortest distance D3, and the fourth shortest distance D4 are all greater than 0.

[0161] In some examples, as shown in Figure 10, in sub-pixel 210, the black matrix opening 145 extends beyond the pixel opening 125; that is, the orthographic projection of the pixel opening 125 onto the substrate 110 lies within the orthographic projection of the black matrix opening 145 onto the substrate 110. In this case, since the aforementioned third shortest distance D3 is not equal to the first shortest distance D1 and the second shortest distance D2, and the fourth shortest distance D4 is not equal to both the first shortest distance D1 and the third shortest distance D2, the diffracted light generated by ambient light at the pixel opening 125 and the black matrix opening 145 cannot form stable interference, thereby improving the color separation phenomenon. It should be noted that the orthographic projection A being located within the orthographic projection B in the embodiments of this disclosure does not include the case where the orthographic projection A and the orthographic projection B are in contact.

[0162] Additionally, referring to Figure 8, in this example, there is also an annular ramp portion 126 outside the pixel opening 125. In this case, the pixel defining layer 120 includes the annular ramp portion 126 surrounding each pixel opening 125 and a pixel defining portion 127 located on the side of the annular ramp portion 126 away from the pixel opening 125; the thickness of the annular ramp portion 126 in the direction perpendicular to the substrate 110 is less than the average thickness of the pixel defining portion 127 in the direction perpendicular to the substrate 110. In this situation, the cathode 180 on the annular ramp portion 126 will directionally reflect light, and this reflected light is one of the causes of color separation.

[0163] In some examples, as shown in Figure 10, at least one of the third shortest distance D3 and the fourth shortest distance D4 can be set to be less than the width of the annular ramp portion 126, so that the black matrix layer 140 can partially occlude the annular ramp portion 126, thereby further improving the color separation phenomenon.

[0164] In some examples, at least one of the first shortest distance D1 and the second shortest distance D2 may be set to be less than the width of the annular ramp portion 126, so that the black matrix layer 140 can partially occlude the annular ramp portion 126, thereby further improving the color separation phenomenon.

[0165] In some examples, as shown in Figure 10, the shape of the orthographic projection of the black matrix opening 145 onto the substrate 110 in sub-pixel 210 includes an inverted ellipse, and the shape of the orthographic projection of the pixel opening 125 onto the substrate 110 can also be an inverted ellipse. The shape design of the black matrix opening 145 and the pixel opening 125 can be found in the relevant description in Figure 7, and will not be repeated here.

[0166] In some examples, as shown in Figure 10, in sub-pixel 210, the length of the first major axis A1 of the black matrix opening 145 is greater than the length of the second major axis A3 of the pixel opening 125; the first major axis A1 of the black matrix opening 145 is located on the side of the second major axis A3 of the pixel opening 125 closer to the third edge E3; that is, the first major axis A1 of the black matrix opening 145 is located to the right of the second major axis A3 of the pixel opening 125.

[0167] In some examples, as shown in Figure 10, the first major axis A1 of the black matrix opening 145 is parallel to the second major axis A3 of the pixel opening 125; the first minor axis A2 of the black matrix opening 145 is parallel to or overlaps with the second minor axis A4 of the pixel opening 125.

[0168] In some examples, as shown in Figure 10, the radius of curvature of the first edge E1 of the black matrix opening 145 is greater than the radius of curvature of the third edge E3 of the pixel opening 125. The radius of curvature of the first edge E1 of the black matrix opening 145 may be greater than, equal to, or less than the radius of curvature of the fourth edge E4 of the pixel opening 125.

[0169] In some examples, as shown in FIG10, the second edge E2 of the black matrix opening 145 and the third edge E3 of the pixel opening 125 are located on the same side, and the first edge E1 of the black matrix opening 145 and the fourth edge E4 of the pixel opening 125 are located on the same side. FIG11 is a planar schematic diagram of the pixel opening and black matrix opening in another sub-pixel provided in an embodiment of the present disclosure. The sub-pixels in any of the display substrates provided in FIG1 to 6 can also adopt the related design of pixel opening and black matrix opening as shown in FIG11.

[0170] As shown in Figure 11, in a sub-pixel 210, the black matrix opening 145 has a first endpoint P1 and a second endpoint P2 extending along the first major axis A1. The edge of the black matrix opening 145 is divided into a first edge E1 and a second edge E2 by the first endpoint P1 and the second endpoint P2, respectively. The length of the first edge E1 is greater than the length of the second edge E2. That is, the black matrix opening 145 not only has a major axis, but its first edge E1 and second edge E2 also have different lengths. This results in different diffraction effects of light not only in the two axial directions of the black matrix opening 145, but also in the diffraction effects produced by light at the first edge E1 and the second edge E2 of the black matrix opening 145. Therefore, by setting the black matrix openings of sub-pixels of the same color to have different orientations, stable interference between diffracted light from the same color sub-pixel can be disrupted. It is worth noting that the distance between the first endpoint P1 and the second endpoint P2 of the aforementioned black matrix opening 145 can be the maximum size of the black matrix opening 145.

[0171] As shown in Figure 11, similarly, the orthographic projection of the first endpoint P1 on the substrate 110 and the orthographic projection of the pixel opening 125 on the substrate 110 have a first shortest distance D1; the orthographic projection of the second endpoint P2 on the substrate 110 and the orthographic projection of the pixel opening 125 on the substrate 110 have a second shortest distance D2; the orthographic projection of the first edge E1 of the black matrix opening 145 on the substrate 110 and the orthographic projection of the pixel opening 125 on the substrate 110 have a third shortest distance D3, which is not equal to the first shortest distance D1 and the second shortest distance D2. Therefore, the diffracted light generated by the ambient light at the pixel opening 125 and the black matrix opening 145 cannot form stable interference, thereby improving the color separation phenomenon. In other words, the pixel opening and black matrix opening with the above configuration can disrupt the stable interference of the diffracted light generated by the pixel opening and the black matrix opening, thereby also improving the color separation phenomenon.

[0172] In some examples, as shown in Figure 11, similarly, the orthographic projection of the second edge E2 of the black matrix opening 145 onto the substrate 110 has a fourth shortest distance D4 between it and the orthographic projection of the pixel opening 125 onto the substrate 110. This fourth shortest distance D4 is not equal to both the first shortest distance D1 and the third shortest distance D2. Therefore, the display substrate can further improve color separation.

[0173] In some examples, as shown in Figure 11, the first shortest distance D1 and the second shortest distance D2 are equal. Therefore, the display substrate improves color separation while exhibiting better display performance. Of course, embodiments of this disclosure include, but are not limited to, the first shortest distance D1 and the second shortest distance D2 may not be equal.

[0174] In some examples, as shown in FIG11, in sub-pixel 210, the portion of the orthogonal projection of the first edge E1 or the second edge E2 of the black matrix opening 145 onto the substrate 110 lies within the orthogonal projection of the pixel opening 125 onto the substrate 110, while the portion of the orthogonal projection of the first edge E1 or the second edge E2 of the black matrix opening 145 onto the substrate 110 lies outside the orthogonal projection of the pixel opening 125 onto the substrate 110. That is, the black matrix opening 145 is partially recessed within the pixel opening 125. Therefore, this display substrate can also prevent stable interference of the diffracted light generated by ambient light at the pixel opening 125 and the black matrix opening 145, thereby improving color separation. Of course, embodiments of this disclosure include, but are not limited to, the portions of the orthogonal projections of the first edge and the second edge of the black matrix opening onto the substrate may both lie outside the orthogonal projection of the pixel opening onto the substrate.

[0175] In some examples, as shown in Figure 11, in sub-pixel 210, a portion of the orthographic projection of the first edge E1 of the black matrix opening 145 onto the substrate 110 lies within the orthographic projection of the pixel opening 125 onto the substrate 110, while another portion of the orthographic projection of the first edge E1 of the black matrix opening 145 onto the substrate 110 lies outside the orthographic projection of the pixel opening 125 onto the substrate 110. In this case, the gap between the first edge E1 of the black matrix opening 145 and the edge of the pixel opening 125 has different shapes and sizes than the gap between the second edge E2 of the black matrix opening 145 and the edge of the pixel opening 125. This prevents the diffracted light generated by ambient light at the pixel opening 125 and the black matrix opening 145 from forming stable interference, thereby improving color separation.

[0176] In some examples, as shown in Figure 11, in sub-pixel 210, the orthographic projection of the second edge E2 of the black matrix opening 145 onto the substrate 110 is entirely outside the orthographic projection of the pixel opening 125 onto the substrate 110.

[0177] In some examples, as shown in Figure 11, in sub-pixel 210, the orthographic projection of the third edge E3 of pixel opening 125 onto substrate 110 is entirely within the orthographic projection of the black matrix opening 145 onto substrate 110; the orthographic projection of the fourth edge E4 of pixel opening 125 onto substrate 110 is partially outside the orthographic projection of the black matrix opening 145 onto substrate 110.

[0178] Additionally, referring to Figure 8, in this example, there is also an annular ramp portion 126 outside the pixel opening 125. In this case, the pixel defining layer 120 includes the annular ramp portion 126 surrounding each pixel opening 125 and a pixel defining portion 127 located on the side of the annular ramp portion 126 away from the pixel opening 125; the thickness of the annular ramp portion 126 in the direction perpendicular to the substrate 110 is less than the average thickness of the pixel defining portion 127 in the direction perpendicular to the substrate 110. In this situation, the cathode 180 on the annular ramp portion 126 will directionally reflect light, and this reflected light is one of the causes of color separation.

[0179] In some examples, as shown in FIG11, since at least a portion of the orthographic projection of the first edge E1 of the black matrix opening 145 onto the substrate 110 lies within the orthographic projection of the pixel opening 125 onto the substrate 110, the black matrix layer 140 can partially block the annular ramp portion 126, thereby further improving the color separation phenomenon.

[0180] In some examples, as shown in Figure 11, the shape of the orthographic projection of the black matrix opening 145 onto the substrate 110 in sub-pixel 210 includes an inverted ellipse, and the shape of the orthographic projection of the pixel opening 125 onto the substrate 110 can also be an inverted ellipse. The shape design of the black matrix opening 145 and the pixel opening 125 can be found in the relevant description in Figure 7, and will not be repeated here.

[0181] In some examples, as shown in Figure 11, in sub-pixel 210, the length of the first major axis A1 of the black matrix opening 145 is greater than the length of the second major axis A3 of the pixel opening 125; the first major axis A1 of the black matrix opening 145 is located on the side of the second major axis A3 of the pixel opening 125 closer to the third edge E3; that is, the first major axis A1 of the black matrix opening 145 is located to the right of the second major axis A3 of the pixel opening 125.

[0182] In some examples, as shown in Figure 11, the first major axis A1 of the black matrix opening 145 is parallel to the second major axis A3 of the pixel opening 125; the first minor axis A2 of the black matrix opening 145 is parallel to or overlaps with the second minor axis A4 of the pixel opening 125.

[0183] In some examples, as shown in Figure 11, the radius of curvature of the first edge E1 of the black matrix opening 145 is greater than the radius of curvature of the third edge E3 of the pixel opening 125. The radius of curvature of the first edge E1 of the black matrix opening 145 may be greater than, equal to, or less than the radius of curvature of the fourth edge E4 of the pixel opening 125.

[0184] Figures 12-15 are schematic planar views of pixel openings and black matrix openings in several other sub-pixels provided in an embodiment of this disclosure. The sub-pixels in any of the display substrates provided in Figures 1 to 6 can also adopt the pixel opening and black matrix opening designs shown in Figures 12-15.

[0185] As shown in Figures 12-15, in a sub-pixel 210, the black matrix opening 145 has a first endpoint P1 and a second endpoint P2 extending along the first major axis A1. The edge of the black matrix opening 145 is divided into a first edge E1 and a second edge E2 by the first endpoint P1 and the second endpoint P2, respectively. The length of the first edge E1 is greater than the length of the second edge E2. That is, the black matrix opening 145 not only has a major axis, but its first edge E1 and second edge E2 also have different lengths. This results in different diffraction effects of light not only in the two axial directions of the black matrix opening 145, but also in the diffraction effects produced by light at the first edge E1 and the second edge E2 of the black matrix opening 145. Therefore, by setting the black matrix openings of sub-pixels of the same color to have different orientations, stable interference between diffracted light from sub-pixels of the same color can be disrupted. It is worth noting that the distance between the first endpoint P1 and the second endpoint P2 of the aforementioned black matrix opening 145 can be the maximum size of the black matrix opening 145.

[0186] As shown in Figures 12-15, similarly, the orthographic projection of the first endpoint P1 on the substrate 110 and the orthographic projection of the pixel opening 125 on the substrate 110 have a first shortest distance D1; the orthographic projection of the second endpoint P2 on the substrate 110 and the orthographic projection of the pixel opening 125 on the substrate 110 have a second shortest distance D2; the orthographic projection of the first edge E1 of the black matrix opening 145 on the substrate 110 and the orthographic projection of the pixel opening 125 on the substrate 110 have a third shortest distance D3, and the third shortest distance D3 is not equal to at least one of the first shortest distance D1 and the second shortest distance D2. Therefore, the diffracted light generated by the ambient light at the pixel opening 125 and the black matrix opening 145 cannot form stable interference, thereby improving the color separation phenomenon. In other words, the pixel opening and black matrix opening with the above configuration can disrupt the stable interference of the diffracted light generated by the pixel opening and the black matrix opening, thereby also improving the color separation phenomenon.

[0187] In some examples, as shown in Figures 12-15, the third shortest distance D3 is not equal to the first shortest distance D1 and the second shortest distance D2, which can further improve the color separation phenomenon.

[0188] In some examples, as shown in Figures 12-15, similarly, the orthographic projection of the second edge E2 of the black matrix opening 145 onto the substrate 110 has a fourth shortest distance D4 between it and the orthographic projection of the pixel opening 125 onto the substrate 110. This fourth shortest distance D4 is not equal to at least one of the first shortest distance D1 and the third shortest distance D2. Therefore, the display substrate can further improve color separation.

[0189] In some examples, as shown in Figures 12-15, the fourth shortest distance D4 is not equal to the first shortest distance D1 and the second shortest distance D2, which can further improve the color separation phenomenon.

[0190] In some examples, as shown in Figures 12-15, in sub-pixel 210, the orthographic projection of pixel opening 125 onto substrate 110 is tangent to the orthographic projection of black matrix opening 145 onto substrate 110 at at least one point. This arrangement allows the third shortest distance D3 to be unequal to the first shortest distance D1 and the second shortest distance D2.

[0191] In some examples, as shown in Figures 12-15, in sub-pixel 210, the orthographic projection of pixel opening 125 onto substrate 110 is tangent to the orthographic projection of black matrix opening 145 onto substrate 110 at a single point. This arrangement allows the third shortest distance D3 to be unequal to the first shortest distance D1 and the second shortest distance D2.

[0192] In some examples, as shown in Figures 12-15, the shape of the orthographic projection of the black matrix opening 145 onto the substrate 110 in sub-pixel 210 includes an inverted ellipse, and the shape of the orthographic projection of the pixel opening 125 onto the substrate 110 can also be an inverted ellipse. The shape design of the black matrix opening 145 and the pixel opening 125 can be found in the relevant description in Figure 7, and will not be repeated here.

[0193] In some examples, as shown in Figure 12, the orthographic projection of the third edge E3, the fourth endpoint P4, or the fourth edge E4 of the pixel opening 125 onto the substrate 110 is tangent to the orthographic projection of the second edge E2 of the black matrix opening 145 onto the substrate 110 at at least one point.

[0194] In some examples, as shown in Figure 12, in sub-pixel 210, the first major axis A1 of the black matrix opening 145 and the second major axis A3 of the pixel opening 125 intersect, for example, perpendicular to each other; the first minor axis A2 of the black matrix opening 145 and the second minor axis A4 of the pixel opening 125 intersect, for example, perpendicular to each other; and the second edge E2 of the black matrix opening 145 is tangent to the edge of the pixel opening 125 at a point.

[0195] In some examples, as shown in Figure 12, in sub-pixel 210, the length of the first major axis A1 of the black matrix opening 145 is greater than the length of the second major axis A3 of the pixel opening 125; the first major axis A1 of the black matrix opening 145 and the second minor axis A4 of the pixel opening 125 are parallel to or overlap each other.

[0196] In some examples, as shown in Figure 12, the first minor axis A2 of the black matrix opening 145 is parallel to the second major axis A3 of the pixel opening 125.

[0197] In some examples, as shown in Figure 12, the radius of curvature of the first edge E1 of the black matrix opening 145 is greater than the radius of curvature of the third edge E3 of the pixel opening 125. The radius of curvature of the first edge E1 of the black matrix opening 145 may be greater than, equal to, or less than the radius of curvature of the fourth edge E4 of the pixel opening 125.

[0198] In some examples, as shown in Figure 13, the orthographic projection of the third edge E3, the fourth endpoint P4, or the fourth edge E4 of the pixel opening 125 onto the substrate 110 is tangent to the orthographic projection of the first edge E1 of the black matrix opening 145 onto the substrate 110 at at least one point.

[0199] In some examples, as shown in Figure 13, in sub-pixel 210, the first major axis A1 of the black matrix opening 145 and the second major axis A3 of the pixel opening 125 intersect, for example, perpendicular to each other; the first minor axis A2 of the black matrix opening 145 and the second minor axis A4 of the pixel opening 125 intersect, for example, perpendicular to each other; and the first edge E1 of the black matrix opening 145 is tangent to the edge of the pixel opening 125 at a point.

[0200] In some examples, as shown in Figure 13, in sub-pixel 210, the length of the first major axis A1 of the black matrix opening 145 is greater than the length of the second major axis A3 of the pixel opening 125; the first major axis A1 of the black matrix opening 145 is parallel to the second minor axis A4 of the pixel opening 125, and the first major axis A1 of the black matrix opening 145 is located on the side of the second minor axis A4 of the pixel opening 125 closer to the second edge E2, that is: the first major axis A1 of the black matrix opening 145 is located to the right of the second minor axis A4 of the pixel opening 125.

[0201] In some examples, as shown in Figure 13, the first minor axis A2 of the black matrix opening 145 is parallel to the second major axis A3 of the pixel opening 125, and the first minor axis A2 of the black matrix opening 145 is located on the side of the second major axis A3 of the pixel opening 125 closer to the fourth edge E4, that is: the first minor axis A2 of the black matrix opening 145 is located below the second major axis A3 of the pixel opening 125.

[0202] In some examples, as shown in Figure 13, the radius of curvature of the first edge E1 of the black matrix opening 145 is greater than the radius of curvature of the third edge E3 of the pixel opening 125. The radius of curvature of the first edge E1 of the black matrix opening 145 may be greater than, equal to, or less than the radius of curvature of the fourth edge E4 of the pixel opening 125.

[0203] In some examples, as shown in Figure 14, the orthographic projection of the fourth edge E4 of the pixel opening 125 onto the substrate 110 is tangent to the orthographic projection of the first edge E1 of the black matrix opening 145 onto the substrate 110 at at least one point.

[0204] In some examples, as shown in Figure 14, in sub-pixel 210, the first major axis A1 of the black matrix opening 145 and the second major axis A3 of the pixel opening 125 are parallel to each other; the first minor axis A2 of the black matrix opening 145 and the second minor axis A4 of the pixel opening 125 are parallel to each other; the first edge E1 of the black matrix opening 145 is tangent to the edge of the pixel opening 125 at a point.

[0205] In some examples, as shown in Figure 14, in sub-pixel 210, the length of the first major axis A1 of the black matrix opening 145 is greater than the length of the second major axis A3 of the pixel opening 125; the first major axis A1 of the black matrix opening 145 and the second major axis A3 of the pixel opening 125 are parallel to each other, and the first major axis A1 of the black matrix opening 145 is located on the side of the second major axis A3 of the pixel opening 125 closer to the second edge E2 or the third edge E3, that is: the first major axis A1 of the black matrix opening 145 is located to the right of the second major axis A3 of the pixel opening 125.

[0206] In some examples, as shown in Figure 14, the first minor axis A2 of the black matrix opening 145 is parallel to the second minor axis A4 of the pixel opening 125, and the first minor axis A2 of the black matrix opening 145 is located on the side of the second minor axis A4 of the pixel opening 125 closer to the second endpoint P2, that is: the first minor axis A2 of the black matrix opening 145 is located below the second minor axis A4 of the pixel opening 125.

[0207] In some examples, as shown in Figure 14, the radius of curvature of the first edge E1 of the black matrix opening 145 is greater than the radius of curvature of the third edge E3 of the pixel opening 125. The radius of curvature of the first edge E1 of the black matrix opening 145 may be greater than, equal to, or less than the radius of curvature of the fourth edge E4 of the pixel opening 125.

[0208] In some examples, as shown in Figure 15, the orthographic projection of the third edge E3 of the pixel opening 125 onto the substrate 110 is tangent to the orthographic projection of the second edge E2 of the black matrix opening 145 onto the substrate 110 at at least one point.

[0209] In some examples, as shown in Figure 15, in sub-pixel 210, the first major axis A1 of the black matrix opening 145 and the second major axis A3 of the pixel opening 125 are parallel to each other; the first minor axis A2 of the black matrix opening 145 and the second minor axis A4 of the pixel opening 125 are parallel to each other.

[0210] In some examples, as shown in Figure 15, in sub-pixel 210, the length of the first major axis A1 of the black matrix opening 145 is greater than the length of the second major axis A3 of the pixel opening 125; the first major axis A1 of the black matrix opening 145 is parallel to the second major axis A3 of the pixel opening 125, and the first major axis A1 of the black matrix opening 145 is located on the side of the second major axis A3 of the pixel opening 125 closer to the second edge E2 or the third edge E3, that is: the first major axis A1 of the black matrix opening 145 is located to the right of the second major axis A3 of the pixel opening 125.

[0211] In some examples, as shown in Figure 15, the first minor axis A2 of the black matrix opening 145 is parallel to or coincides with the second minor axis A4 of the pixel opening 125.

[0212] In some examples, as shown in Figure 15, the radius of curvature of the first edge E1 of the black matrix opening 145 is greater than the radius of curvature of the third edge E3 of the pixel opening 125. The radius of curvature of the first edge E1 of the black matrix opening 145 may be greater than, equal to, or less than the radius of curvature of the fourth edge E4 of the pixel opening 125.

[0213] Figures 16-17 are schematic planar views of pixel openings and black matrix openings in several other sub-pixels provided in an embodiment of this disclosure. The sub-pixels in any of the display substrates provided in Figures 1 to 6 can also adopt the pixel opening and black matrix opening designs shown in Figures 16-17.

[0214] As shown in Figures 16-17, in a sub-pixel 210, the orthographic projection of the pixel opening 125 onto the substrate 110 is tangent to the orthographic projection of the black matrix opening 145 onto the substrate 110 at two points. This arrangement ensures that the third shortest distance D3 is not equal to the first shortest distance D1 and the second shortest distance D2, thereby improving color separation.

[0215] In some examples, as shown in Figures 16-17, the shape of the orthographic projection of the black matrix opening 145 onto the substrate 110 in sub-pixel 210 includes an inverted ellipse, and the shape of the orthographic projection of the pixel opening 125 onto the substrate 110 can also be an inverted ellipse. The shape design of the black matrix opening 145 and the pixel opening 125 can be found in the relevant description in Figure 7, and will not be repeated here.

[0216] In some examples, as shown in Figures 16-17, the first major axis A1 of the black matrix opening 145 and the second major axis A3 of the pixel opening 125 intersect, for example, are perpendicular to each other; the first minor axis A2 of the black matrix opening 145 and the second minor axis A4 of the pixel opening 125 intersect, for example, are perpendicular to each other; the first edge E1 and the second edge E2 of the black matrix opening 145 are tangent to the edge of the pixel opening 125 at a point, such that the edge of the black matrix opening 145 is tangent to the edge of the pixel opening 125 at two points. That is, the pixel opening 125 is horizontally positioned relative to the black matrix opening 145 and is tangent to the edge of the black matrix opening 145 at two points.

[0217] In some examples, as shown in Figure 16, in sub-pixel 210, the orthographic projection of the black matrix opening 145 onto the substrate 110 can be divided into an upper and a lower portion by the first minor axis A2; the orthographic projection of the pixel opening 125 onto the substrate 110 is mostly located at the lower portion of the orthographic projection of the black matrix opening 145 onto the substrate 110; that is, the overlap area between the orthographic projection of the pixel opening 125 onto the substrate 110 and the lower portion of the orthographic projection of the black matrix opening 145 onto the substrate 110 is greater than the overlap area between the orthographic projection of the pixel opening 125 onto the substrate 110 and the upper portion of the orthographic projection of the black matrix opening 145 onto the substrate 110.

[0218] In some examples, as shown in Figure 16, the length of the first major axis A1 of the black matrix opening 145 is greater than the length of the second major axis A3 of the pixel opening 125; the first major axis A1 of the black matrix opening 145 is parallel to the second minor axis A4 of the pixel opening 125, and the first major axis A1 of the black matrix opening 145 is located on the side of the second minor axis A4 of the pixel opening 125 closer to the second edge E2, that is: the first major axis A1 of the black matrix opening 145 is located to the right of the second minor axis A4 of the pixel opening 125.

[0219] In some examples, as shown in Figure 16, the first minor axis A2 of the black matrix opening 145 is parallel to the second major axis A3 of the pixel opening 125, and the first minor axis A2 of the black matrix opening 145 is located on the side of the second major axis A3 of the pixel opening 125 closer to the first endpoint P1, that is: the first minor axis A2 of the black matrix opening 145 is located above the second major axis A3 of the pixel opening 125.

[0220] In some examples, as shown in Figure 16, the radius of curvature of the first edge E1 of the black matrix opening 145 is greater than the radius of curvature of the third edge E3 of the pixel opening 125. The radius of curvature of the first edge E1 of the black matrix opening 145 may be greater than, equal to, or less than the radius of curvature of the fourth edge E4 of the pixel opening 125. In some examples, as shown in Figure 17, in the sub-pixel 210, the orthographic projection of the black matrix opening 145 on the substrate 110 can be divided into an upper and a lower part by the first minor axis A2; most of the orthographic projection of the pixel opening 125 on the substrate 110 is located in the upper part of the orthographic projection of the black matrix opening 145 on the substrate 110; that is, the overlap area between the lower part of the orthographic projection of the pixel opening 125 on the substrate 110 and the orthographic projection of the black matrix opening 145 on the substrate 110 is less than the overlap area between the upper part of the orthographic projection of the pixel opening 125 on the substrate 110 and the orthographic projection of the black matrix opening 145 on the substrate 110.

[0221] In some examples, as shown in Figure 17, in sub-pixel 210, the length of the first major axis A1 of the black matrix opening 145 is greater than the length of the second major axis A3 of the pixel opening 125; the first major axis A1 of the black matrix opening 145 is parallel to the second minor axis A4 of the pixel opening 125, and the first major axis A1 of the black matrix opening 145 is located on the side of the second minor axis A4 of the pixel opening 125 closer to the second edge E2, that is: the first major axis A1 of the black matrix opening 145 is located to the right of the second minor axis A4 of the pixel opening 125.

[0222] In some examples, as shown in Figure 17, the first minor axis A2 of the black matrix opening 145 is parallel to the second major axis A3 of the pixel opening 125, and the first minor axis A2 of the black matrix opening 145 is located on the side of the second major axis A3 of the pixel opening 125 closer to the second endpoint P2, that is: the first minor axis A2 of the black matrix opening 145 is located below the second major axis A3 of the pixel opening 125.

[0223] In some examples, as shown in Figure 17, the radius of curvature of the first edge E1 of the black matrix opening 145 is greater than the radius of curvature of the third edge E3 of the pixel opening 125. The radius of curvature of the first edge E1 of the black matrix opening 145 may be greater than, equal to, or less than the radius of curvature of the fourth edge E4 of the pixel opening 125.

[0224] Figures 18-20 are schematic planar views of pixel openings and black matrix openings in several other sub-pixels provided in an embodiment of this disclosure. Figures 18-20 show the edge contact between the pixel openings and black matrix openings in several other cases. The sub-pixels in any of the display substrates provided in Figures 1 to 6 can also adopt the related designs of pixel openings and black matrix openings shown in Figures 18-20.

[0225] As shown in Figures 18-20, in sub-pixel 210, at least a portion of the orthogonal projection of the first edge E1 or the second edge E2 of the black matrix opening 145 onto the substrate 110 coincides with the orthogonal projection of the edge of the pixel opening 125 onto the substrate 110. In this case, the display substrate can effectively and to a large extent disrupt the stable interference of diffracted light generated by the pixel opening and the black matrix opening, thereby also improving the color separation phenomenon. It should be noted that the embodiments of this disclosure do not limit the specific edge of the pixel opening that the first edge or the second edge coincides with.

[0226] For example, as shown in FIG18, at least a portion of the orthographic projection of the first edge E1 of the black matrix opening 145 onto the substrate 110 coincides with the orthographic projection of the third edge E3 of the pixel opening 125 onto the substrate 110. Of course, embodiments of this disclosure include, but are not limited to, at least a portion of the orthographic projection of the first edge of the black matrix opening onto the substrate coincides with the orthographic projection of the fourth edge of the pixel opening onto the substrate.

[0227] For example, as shown in Figure 18, there is a first shortest distance D1 between the orthographic projection of the first endpoint P1 on the substrate 110 and the orthographic projection of the pixel opening 125 on the substrate 110, and there is a second shortest distance D2 between the orthographic projection of the second endpoint P2 on the substrate 110 and the orthographic projection of the pixel opening 125 on the substrate 110; the first shortest distance D1 and the second shortest distance D2 are not equal.

[0228] For example, as shown in Figure 18, the orthographic projection of the first edge E1 of the black matrix opening 145 onto the substrate 110 has a third shortest distance D3 between it and the orthographic projection of the pixel opening 125 onto the substrate 110. This third shortest distance D3 is not equal to at least one of the first shortest distance D1 and the second shortest distance D2. Therefore, since the third shortest distance D3 is not equal to at least one of the first shortest distance D1 and the second shortest distance D2, the diffracted light generated by the ambient light at the pixel opening 125 and the black matrix opening 145 cannot form stable interference, thereby improving the color separation phenomenon. In other words, the pixel opening and black matrix opening with the above configuration can disrupt the stable interference of the diffracted light generated by the pixel opening and the black matrix opening, thereby also improving the color separation phenomenon.

[0229] In some examples, as shown in Figure 18, in sub-pixel 210, the first edge E1 of the black matrix opening 145 can be divided into an upper edge and a lower edge by the first minor axis A2; the orthographic projection of the lower edge of the first edge E1 of the black matrix opening 145 on the substrate 110 coincides with the orthographic projection of the third edge E3 of the pixel opening 125 on the substrate 110.

[0230] In some examples, as shown in Figure 18, in sub-pixel 210, the length of the first major axis A1 of the black matrix opening 145 is greater than the length of the second major axis A3 of the pixel opening 125; the first major axis A1 of the black matrix opening 145 is parallel to the second major axis A3 of the pixel opening 125, and the first major axis A1 of the black matrix opening 145 is located on the side of the second major axis A3 of the pixel opening 125 closer to the second edge E2, that is: the first major axis A1 of the black matrix opening 145 is located to the right of the second major axis A3 of the pixel opening 125.

[0231] In some examples, as shown in Figure 18, the first minor axis A2 of the black matrix opening 145 is parallel to the second minor axis A4 of the pixel opening 125, and the first minor axis A2 of the black matrix opening 145 is located on the side of the second minor axis A4 of the pixel opening 125 closer to the first endpoint P1, that is: the first minor axis A2 of the black matrix opening 145 is located above the second minor axis A4 of the pixel opening 125.

[0232] In some examples, as shown in FIG18, the radius of curvature of the first edge E1 of the black matrix opening 145 is greater than the radius of curvature of the third edge E3 of the pixel opening 125. The radius of curvature of the first edge E1 of the black matrix opening 145 may be greater than, equal to, or less than the radius of curvature of the fourth edge E4 of the pixel opening 125. For example, as shown in FIG19, at least a portion of the orthographic projection of the second edge E2 of the black matrix opening 145 onto the substrate 110 coincides with the orthographic projection of the third edge E3 of the pixel opening 125 onto the substrate 110. Of course, embodiments of this disclosure include, but are not limited to, the at least portion of the orthographic projection of the second edge of the black matrix opening onto the substrate may also coincide with the orthographic projection of the fourth edge of the pixel opening onto the substrate.

[0233] In some examples, as shown in Figure 19, in sub-pixel 210, the second edge E2 of the black matrix opening 145 can be divided into an upper edge and a lower edge by the first short axis A2; the orthographic projection of the upper edge of the second edge E2 of the black matrix opening 145 on the substrate 110 coincides with the orthographic projection of the third edge E3 of the pixel opening 125 on the substrate 110.

[0234] In some examples, as shown in Figure 19, in sub-pixel 210, the length of the first major axis A1 of the black matrix opening 145 is greater than the length of the second major axis A3 of the pixel opening 125; the first major axis A1 of the black matrix opening 145 and the second major axis A3 of the pixel opening 125 are parallel to each other, and the first major axis A1 of the black matrix opening 145 is located on the side of the second major axis A3 of the pixel opening 125 closer to the second edge E2, that is: the first major axis A1 of the black matrix opening 145 is located on the right side of the second major axis A3 of the pixel opening 125.

[0235] In some examples, as shown in Figure 19, the first minor axis A2 of the black matrix opening 145 is parallel to the second minor axis A4 of the pixel opening 125, and the first minor axis A2 of the black matrix opening 145 is located on the side of the second minor axis A4 of the pixel opening 125 closer to the second endpoint P2, that is: the first minor axis A2 of the black matrix opening 145 is located below the second minor axis A4 of the pixel opening 125.

[0236] In some examples, as shown in Figure 19, the radius of curvature of the first edge E1 of the black matrix opening 145 is greater than the radius of curvature of the third edge E3 of the pixel opening 125. The radius of curvature of the first edge E1 of the black matrix opening 145 may be greater than, equal to, or less than the radius of curvature of the fourth edge E4 of the pixel opening 125.

[0237] For example, as shown in FIG20, at least a portion of the orthographic projection of the second edge E2 of the black matrix opening 145 onto the substrate 110 coincides with the orthographic projection of the fourth edge E4 of the pixel opening 125 onto the substrate 110. In this case, the display substrate can effectively and to a large extent disrupt the stable interference of diffracted light generated by the pixel opening and the black matrix opening, thereby also improving the color separation phenomenon. Of course, embodiments of this disclosure include, but are not limited to, the orthographic projection of the second edge of the black matrix opening onto the substrate onto the substrate may also coincide with the orthographic projection of the third edge of the pixel opening onto the substrate.

[0238] In some examples, as shown in Figure 20, in sub-pixel 210, the length of the first major axis A1 of the black matrix opening 145 is greater than the length of the second major axis A3 of the pixel opening 125; the first major axis A1 of the black matrix opening 145 and the second major axis A3 of the pixel opening 125 are parallel to each other, and the first major axis A1 of the black matrix opening 145 is located on the side of the second major axis A3 of the pixel opening 125 closer to the first edge E1, that is: the first major axis A1 of the black matrix opening 145 is located to the left of the second major axis A3 of the pixel opening 125.

[0239] In some examples, as shown in Figure 20, the first minor axis A2 of the black matrix opening 145 is parallel to or coincides with the second minor axis A4 of the pixel opening 125.

[0240] In some examples, as shown in Figure 19, the radius of curvature of the first edge E1 of the black matrix opening 145 is greater than the radius of curvature of the third edge E3 of the pixel opening 125. The radius of curvature of the first edge E1 of the black matrix opening 145 may be greater than, equal to, or less than the radius of curvature of the fourth edge E4 of the pixel opening 125.

[0241] In some examples, as shown in Figures 18-20, the shape of the orthographic projection of the black matrix opening 145 onto the substrate 110 in sub-pixel 210 includes an inverted ellipse, and the shape of the orthographic projection of the pixel opening 125 onto the substrate 110 can also be an inverted ellipse. The shape design of the black matrix opening 145 and the pixel opening 125 can be found in the relevant description in Figure 7, and will not be repeated here.

[0242] Figure 21 is a planar schematic diagram of the pixel opening and black matrix opening in another sub-pixel according to an embodiment of this disclosure. The sub-pixels in any of the display substrates provided in Figures 1 to 6 can also adopt the related design of pixel opening and black matrix opening as shown in Figure 21.

[0243] As shown in Figure 21, in sub-pixel 210, the planar shape of pixel opening 125 is not limited to the shape with a third and fourth edge as described above, but is circular. In this case, black matrix opening 145 and pixel opening 125 can also form edge contact, point contact, intersection, outward expansion, or inward contraction so that the third shortest distance D3 is not equal to the first shortest distance D1 and the second shortest distance D2, thereby improving the color separation phenomenon. For the specific implementation of the point contact described above, please refer to the relevant descriptions in Figures 7 and 18-20; for the specific implementation of the point contact described above, please refer to the relevant descriptions in Figures 12-17; for the specific implementation of the intersection described above, please refer to the relevant description in Figure 11; for the specific implementation of the outward expansion described above, please refer to the relevant description in Figure 10; and for the specific implementation of the specific implementation of the inward contraction described above, please refer to the relevant description in Figure 10.

[0244] In some examples, as shown in Figure 21, when the planar shape of the pixel opening 125 is circular, the ratio of the diameter of the pixel opening 125 to the distance between the first endpoint P1 and the second endpoint P2 of the black matrix opening 145 ranges from 0.5 to 0.9. This configuration improves color separation while also accommodating the process requirements and the need for close arrangement of sub-pixels, thus avoiding impacting the resolution and display effect of the display device.

[0245] Figures 22 and 23 are schematic planar views of pixel openings and black matrix openings in two other types of sub-pixels provided in an embodiment of this disclosure. The sub-pixels in any of the display substrates provided in Figures 1 to 6 can also adopt the pixel opening and black matrix opening designs shown in Figures 22 and 23.

[0246] As shown in Figures 22 and 23, in sub-pixel 210, the planar shape of the black matrix opening 145 is not limited to the shape with unequal first and second edges described above, but is a shape with equal first and second edges. That is, the black matrix opening 145 has a first endpoint P1 and a second endpoint P2 in the extension direction of the first major axis A1, and the edge of the black matrix opening 145 is divided into a first edge E1 and a second edge E2 by the first endpoint P1 and the second endpoint P2, and the length of the first edge E1 and the length of the second edge E2 are equal.

[0247] As shown in Figures 22 and 23, the orthographic projection of the first endpoint P1 onto the substrate 110 and the orthographic projection of the pixel opening 125 onto the substrate 110 have a first shortest distance D1; the orthographic projection of the second endpoint P2 onto the substrate 110 and the orthographic projection of the pixel opening 125 onto the substrate 110 have a second shortest distance D2; the orthographic projection of the first edge E1 of the black matrix opening 145 onto the substrate 110 and the orthographic projection of the pixel opening 125 onto the substrate 110 have a third shortest distance D3. The third shortest distance D3 is not equal to at least one of the first shortest distance D1 and the second shortest distance D2. Therefore, since the third shortest distance D3 is not equal to the first shortest distance D1 and the second shortest distance D2, the diffracted light generated by the ambient light at the pixel opening 125 and the black matrix opening 145 cannot form stable interference, thereby improving the color separation phenomenon. In other words, the pixel opening and black matrix opening with the above configuration can disrupt the stable interference of the diffracted light generated by the pixel opening and the black matrix opening, thereby improving the color separation phenomenon.

[0248] In some examples, as shown in Figures 22 and 23, the orthographic projection of the second edge E2 of the black matrix opening 145 onto the substrate 110 has a fourth shortest distance D4 between it and the orthographic projection of the pixel opening 125 onto the substrate 110. This fourth shortest distance D4 is not equal to at least one of the first shortest distance D1 and the second shortest distance D2. Therefore, the display substrate can further improve color separation.

[0249] For example, the third shortest distance D3 is not equal to the first shortest distance D1 and the second shortest distance D2; the fourth shortest distance D4 is not equal to the first shortest distance D1 and the second shortest distance D2.

[0250] In some examples, as shown in Figures 22 and 23, the first shortest distance D1 and the second shortest distance D2 are equal. Therefore, the display substrate achieves better display performance while improving color separation. Of course, embodiments of this disclosure include, but are not limited to, the first shortest distance D1 and the second shortest distance D2 may not be equal.

[0251] In some examples, as shown in Figures 22 and 23, the values ​​of the first shortest distance D1 and the second shortest distance D2 are both greater than 0; the values ​​of the third shortest distance D3 and the fourth shortest distance D4 are both 0. That is, the orthographic projections of the first edge E1 and the second edge E2 of the black matrix opening 145 onto the substrate 110 are tangent to the orthographic projections of the edge of the pixel opening 125 onto the substrate 110. In this case, the display substrate can effectively and to a large extent disrupt the stable interference of the diffracted light generated by the pixel opening and the black matrix opening, thereby improving color separation.

[0252] Similarly, due to manufacturing limitations, pixel openings cannot be formed as perfectly straight up and down openings; therefore, an annular ramp portion exists on the outer side of the pixel opening. In this case, the pixel defining layer includes the annular ramp portion surrounding each pixel opening and a pixel defining portion located on the side of the annular ramp portion away from the pixel opening; the thickness of the annular ramp portion in the direction perpendicular to the substrate is less than the average thickness of the pixel defining portion in the same direction. In this situation, the cathode on the annular ramp portion will directionally reflect light, and this reflected light is one of the causes of color separation.

[0253] In some examples, as shown in Figures 22 and 23, in sub-pixel 210, since the orthographic projections of the first edge E1 and the second edge E2 of the black matrix opening 145 on the substrate 110 are both tangent to the orthographic projections of the edge of the pixel opening 125 on the substrate 110, the orthographic projection of the annular slope portion on the substrate overlaps with the orthographic projections of the first edge and the second edge of the black matrix opening on the substrate 110. In this case, the black matrix layer can partially block the annular slope portion, thereby further improving color separation.

[0254] In some examples, as shown in Figures 22 and 23, in sub-pixel 210, the planar shape of pixel opening 125 has a second major axis A3 and a second minor axis A4. The dimension of pixel opening 125 in the extension direction of the second major axis A3 is the maximum dimension of pixel opening 125, and is larger than the dimension of pixel opening 125 in the extension direction of the second minor axis A4. Therefore, the diffraction effect produced by ambient light in the extension direction of the second major axis of the pixel opening is different from the diffraction effect produced in the diffraction direction of the second minor axis.

[0255] In some examples, as shown in Figures 22 and 23, the planar shape of the black matrix opening 145 is elliptical. The pixel opening 125 has a third endpoint P3 and a fourth endpoint P4 extending along the second major axis A3. The edge of the pixel opening 125 is divided into a third edge E3 and a fourth edge E4 by the third endpoint P3 and the fourth endpoint P4, with the length of the third edge E3 being greater than the length of the fourth edge E4. That is, the pixel opening 125 not only has a major axis, but its third edge E3 and fourth edge E4 also have different lengths. This results in different diffraction effects of light not only in the two axial directions of the pixel opening 125, but also in the diffraction effects produced by light at the third edge E3 and the fourth edge E4 of the pixel opening 125. In this case, setting the pixel openings of the same color sub-pixels to have different orientations can disrupt the stable interference between diffracted light from the same color sub-pixels. It should be noted that the main diffraction effect of light diffracting at the pixel opening is attributed to the edge of the pixel opening; therefore, the diffraction effect at the edge of the pixel opening plays a dominant role in forming the final diffraction pattern.

[0256] In some examples, as shown in Figure 22, the extension direction of the first major axis A1 of the black matrix opening 145 is the same as the extension direction of the second major axis A3 of the pixel opening 125; as shown in Figure 23, the extension direction of the first major axis A1 of the black matrix opening 145 is different from the extension direction of the second major axis A3 of the pixel opening 125; for example, the first major axis A1 of the black matrix opening 145 intersects with the second major axis A3 of the pixel opening 125, for example, they are perpendicular to each other.

[0257] In some examples, as shown in Figures 22 and 23, the planar shape of the black matrix opening 145 is elliptical, the shape of the orthographic projection of the pixel opening 125 on the substrate 110 includes an inverted ellipse, and the third edge E3 and the fourth edge E4 are both arc-shaped; the radius of curvature of the third edge E3 is smaller than the radius of curvature of the fourth edge E4.

[0258] In some examples, as shown in Figures 22 and 23, in sub-pixel 210, the ratio of the distance between the third endpoint P3 and the fourth endpoint P4 to the distance between the first endpoint P1 and the second endpoint P2 ranges from 0.6 to 0.95. Therefore, while improving color separation, this display substrate also meets the needs of process technology and the close arrangement of sub-pixels, avoiding impact on the resolution and display effect of the display device.

[0259] Figures 24-26 are schematic planar views of pixel openings and black matrix openings in three other sub-pixels provided in an embodiment of this disclosure. The sub-pixels in any of the display substrates provided in Figures 1 to 6 can also adopt the pixel opening and black matrix opening designs shown in Figures 24-26.

[0260] As shown in Figures 24-26, the planar shape of the black matrix opening 145 is an inverted ellipse, and the shape of the pixel opening 125 is elliptical. In this case, the ratio of the major axis dimension to the minor axis dimension of the pixel opening 125 ranges from 1.0 to 1.2, and the ratio of the major axis dimension of the pixel opening 125 to the major axis dimension of the black matrix opening 145 ranges from 0.5 to 0.9. Therefore, while improving color separation, this display substrate can also meet the needs of process and the close arrangement of sub-pixels, avoiding affecting the resolution and display effect of the display device. It should be noted that the major axis dimension of the black matrix opening mentioned above is the dimension of the black matrix opening in the extension direction of the first major axis, that is, the distance between the first endpoint and the second endpoint. For details, please refer to the relevant description in Figure 7, which will not be repeated here.

[0261] In some examples, as shown in Figures 24-26, the orthographic projection of the black matrix opening 145 on the substrate 110 and the orthographic projection of the pixel opening 125 on the substrate 110 can form edge contact, thereby improving the color separation phenomenon.

[0262] In some examples, as shown in Figures 24-26, the planar shape of the black matrix opening 145 has a first major axis A1, and the dimension of the black matrix opening 145 in the extension direction of the first major axis A1 is the maximum dimension of the black matrix opening 145. The black matrix opening 145 has a first endpoint P1 and a second endpoint P2 in the extension direction of the first major axis A1, and the edge of the black matrix opening 145 is divided into a first edge E1 and a second edge E2 by the first endpoint P1 and the second endpoint P2, and the length of the first edge E1 is greater than the length of the second edge E2; the planar shape of the pixel opening 125 has a second major axis A3, and the dimension of the pixel opening 125 in the extension direction of the second major axis A3 is the maximum dimension of the pixel opening 125, and the pixel opening 125 has a third endpoint P3 and a fourth endpoint P4 in the extension direction of the second major axis A3, and the edge of the pixel opening 125 is divided into a third edge E3 and a fourth edge E4 by the third endpoint P3 and the fourth endpoint P4, and the length of the third edge E3 is equal to the length of the fourth edge E4.

[0263] In some examples, as shown in Figure 24, the orthographic projection of the first edge E1 of the black matrix opening 145 onto the substrate 110 forms an edge contact with the orthographic projection of the third edge E3 of the pixel opening 125 onto the substrate 110.

[0264] In some examples, as shown in Figure 25, the orthographic projection of the second edge E2 of the black matrix opening 145 onto the substrate 110 forms an edge contact with the orthographic projection of the fourth edge E4 of the pixel opening 125 onto the substrate 110.

[0265] In some examples, as shown in Figure 26, the orthographic projection of a portion of the first edge E1 of the black matrix opening 145 onto the substrate 110 forms an edge contact with the orthographic projection of a portion of the third edge E3 of the pixel opening 125 onto the substrate 110; the orthographic projection of a portion of the second edge E1 of the black matrix opening 145 onto the substrate 110 forms an edge contact with the orthographic projection of a portion of the fourth edge E4 of the pixel opening 125 onto the substrate 110.

[0266] Figure 27 is a planar schematic diagram of the pixel opening and black matrix opening in another sub-pixel according to an embodiment of this disclosure. The sub-pixels in any of the display substrates provided in Figures 1 to 6 can also adopt the related design of pixel opening and black matrix opening as shown in Figure 27.

[0267] As shown in Figure 27, the planar shape of the black matrix opening 145 is elliptical, and the shape of the pixel opening 125 is also elliptical. In this case, the ratio of the major axis dimension to the minor axis dimension of the pixel opening 125 ranges from 1.0 to 1.2, the ratio of the major axis dimension to the minor axis dimension of the black matrix opening 145 ranges from 1.0 to 2.0, and the ratio of the major axis dimension of the pixel opening 125 to the major axis dimension of the black matrix opening 145 ranges from 0.4 to 0.9. Therefore, while improving color separation, this display substrate can also meet the needs of process technology and the close arrangement of sub-pixels, avoiding affecting the resolution and display effect of the display device.

[0268] It is worth noting that the black matrix provided in this embodiment can be a black matrix formed by an opaque film layer, or a black matrix formed by superimposing color filter layers of different colors.

[0269] Figure 28 is a schematic diagram of the structure of a black matrix in a display substrate according to an embodiment of the present disclosure. As shown in Figure 28, a first color filter layer 142A, a second color filter layer 142B, and a third color filter layer 142C are disposed in the insulating layer 130; at this time, the black matrix layer 140 may include at least two stacked green light layers.

[0270] For example, as shown in FIG28, the black matrix layer 140 may include a first color filter layer 140A and a second color filter layer 140B stacked together, a second color filter layer 140B and a third color filter layer 140C stacked together, and a first color filter layer 140A and a third color filter layer 140C stacked together; while each black matrix opening 145 may include a single color filter layer. That is, the portion of the stacked color filters corresponds to the black matrix layer, while the single-layered color filter corresponds to the black matrix opening. Of course, the embodiments of this disclosure include, but are not limited to, that the black matrix layer may also include a stack of three color filter layers. It should be noted that when the black matrix is ​​formed using an opaque film layer, a color filter layer may also be disposed in the black matrix opening.

[0271] For example, the first color filter layer 142A can be a red filter layer that transmits only red light, the second color filter layer 142B can be a green filter layer that transmits only green light, and the third color filter layer 142C can be a blue filter layer that transmits only blue light.

[0272] At least one embodiment of this disclosure also provides a display device. FIG29 is a schematic diagram of a display device provided in an embodiment of this disclosure. As shown in FIG29, the display device 500 includes the display substrate 100 described above. Thus, the display device can also improve color separation phenomena.

[0273] In some examples, the aforementioned display device may be an electronic product with display function, such as a television, computer monitor, laptop computer, tablet computer, mobile phone, navigator, or in-vehicle display.

[0274] The following points need to be explained:

[0275] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure, and other structures can be referred to the general design.

[0276] (2) Where there is no conflict, features of the same embodiment and different embodiments of this disclosure may be combined with each other.

[0277] The above description is merely an exemplary embodiment of this disclosure and is not intended to limit the scope of protection of this disclosure, which is determined by the appended claims.

Claims

1. A display substrate, comprising: Substrate; A pixel defining layer is located on one side of the substrate. An insulating layer is located on the side of the pixel defining layer away from the substrate. as well as The black matrix layer is located on the side of the insulating layer away from the pixel defining layer; The display substrate includes a plurality of sub-pixels, each sub-pixel including a pixel opening located in the pixel defining layer and a black matrix opening located in the black matrix layer, wherein the orthographic projection of the pixel opening on the substrate and the orthographic projection of the black matrix opening on the substrate at least partially overlap; The planar shape of the black matrix opening has a first major axis, the dimension of the black matrix opening in the extension direction of the first major axis is the maximum dimension of the black matrix opening, the black matrix opening has a first endpoint and a second endpoint in the extension direction of the first major axis, the edge of the black matrix opening is divided into a first edge and a second edge by the first endpoint and the second endpoint, and the length of the first edge is greater than the length of the second edge; The planar shape of the pixel opening has a second major axis, and the size of the pixel opening in the extension direction of the second major axis is the maximum size of the pixel opening. The pixel opening has a third endpoint and a fourth endpoint in the extension direction of the second major axis. The edge of the pixel opening is divided into a third edge and a fourth edge by the third endpoint and the fourth endpoint, and the length of the third edge is greater than the length of the fourth edge.

2. The display substrate according to claim 1, wherein, The plurality of sub-pixels includes a plurality of first color sub-pixels, a plurality of second color sub-pixels, and a plurality of third color sub-pixels. The plurality of first major axes of the plurality of black matrix openings of the plurality of first color sub-pixels include M orientations, where M is a positive integer greater than or equal to 2.

3. The display substrate according to claim 2, wherein, The plurality of sub-pixels are divided into a plurality of sub-pixel groups, and the plurality of sub-pixel groups are arranged in an array along a first direction and a second direction intersecting the first direction, wherein the angle between the M orientations and the first direction is different.

4. The display substrate according to claim 3, wherein, The plurality of sub-pixels includes a plurality of minimum repeating units, each of the minimum repeating units including at least M first color sub-pixels, and the at least M first major axes of the at least M first color sub-pixels include M orientations, wherein M satisfies: M = x 2 Or M = 2x 2 x is a positive integer greater than or equal to 2.

5. The display substrate according to claim 4, wherein, Each sub-pixel group includes one first-color sub-pixel, two second-color sub-pixels, and one third-color sub-pixel. Multiple sub-pixel groups are arranged along the first direction to form sub-pixel group rows, and adjacent sub-pixel group rows are aligned along the second direction. In each of the sub-pixel groups, the first center line connecting the first color sub-pixel and the third color sub-pixel intersects the second center line connecting the two second color sub-pixels, and M satisfies: M = x 2 x is a positive integer greater than or equal to 2.

6. The display substrate according to claim 4, wherein, Each sub-pixel group includes one first-color sub-pixel, two second-color sub-pixels, and one third-color sub-pixel. Multiple sub-pixel groups are arranged along the first direction to form a sub-pixel group row, and adjacent sub-pixel group rows are staggered in the second direction. In each of the sub-pixel groups, the first center line connecting the first color sub-pixel and the third color sub-pixel intersects the second center line connecting the two second color sub-pixels. Adjacent sub-pixel groups in the first direction have the same arrangement, and M satisfies: M = 2x 2 x is a positive integer greater than or equal to 2.

7. The display substrate according to claim 4, wherein, Each of the sub-pixel groups includes a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel. In each of the sub-pixel groups, the center lines connecting the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel form a triangle, and M satisfies: M = x 2 x is a positive integer greater than or equal to 2.

8. The display substrate according to any one of claims 1-7, wherein, The plurality of first major axes of the plurality of black matrix openings of the plurality of second color sub-pixels include N orientations, where N is a positive integer greater than or equal to 2.

9. The display substrate according to claim 8, wherein, The plurality of first major axes of the plurality of black matrix openings of the plurality of third color sub-pixels include K orientations, where K is a positive integer greater than or equal to 2.

10. The display substrate according to any one of claims 1-9, wherein, In the sub-pixel, there is a first shortest distance between the orthographic projection of the first endpoint on the substrate and the orthographic projection of the pixel opening on the substrate, and there is a second shortest distance between the orthographic projection of the second endpoint on the substrate and the orthographic projection of the pixel opening on the substrate. There is a third shortest distance between the orthographic projection of the first edge on the substrate and the orthographic projection of the pixel opening on the substrate, the third shortest distance being unequal to at least one of the first shortest distance and the second shortest distance.

11. The display substrate according to claim 10, wherein, The second edge has a fourth shortest distance between its orthographic projection on the substrate and the pixel opening has a fourth shortest distance that is not equal to at least one of the first shortest distance and the third shortest distance.

12. The display substrate according to claim 10, wherein, The first shortest distance and the second shortest distance are equal, while the third shortest distance is not equal to either the first shortest distance or the second shortest distance.

13. The display substrate according to claim 10, wherein, In the sub-pixel, the orthographic projection of the pixel opening on the substrate falls within the orthographic projection of the black matrix opening on the substrate.

14. The display substrate according to claim 10, wherein, In the sub-pixel, the orthographic projection of the pixel opening on the substrate is tangent to the orthographic projection of the black matrix opening on the substrate at at least one point.

15. The display substrate according to claim 10, wherein, In the sub-pixel, at least a portion of the orthographic projection of the first edge or the second edge of the black matrix opening onto the substrate coincides with the orthographic projection of the edge of the pixel opening onto the substrate.

16. The display substrate according to claim 15, wherein, The orthographic projection of the first edge of the black matrix opening on the substrate includes an overlap portion that overlaps with the orthographic projection of the edge of the pixel opening on the substrate.

17. The display substrate according to claim 16, wherein, The length of the overlapping portion is greater than 0.1 micrometers.

18. The display substrate according to claim 10, wherein, In the sub-pixel, at least a portion of the orthogonal projection of the first edge or the second edge of the black matrix opening onto the substrate lies within the orthogonal projection of the pixel opening onto the substrate.

19. The display substrate according to any one of claims 10-18, wherein, The pixel defining layer includes an annular ramp portion surrounding each pixel opening and a pixel defining portion located on the side of the annular ramp portion away from the pixel opening. The thickness of the annular ramp portion in the direction perpendicular to the substrate is less than the average thickness of the pixel defining portion in the direction perpendicular to the substrate. In the sub-pixel, the orthographic projection of the annular ramp portion on the substrate overlaps with the orthographic projection of the first edge or the second edge on the substrate.

20. The display substrate according to any one of claims 10-18, wherein, In the sub-pixel, the shape of the orthogonal projection of the black matrix opening on the substrate includes an inverted ellipse, the first edge is arc-shaped, the second edge is arc-shaped, and the radius of curvature of the first edge is smaller than the radius of curvature of the second edge.

21. The display substrate according to any one of claims 1-20, wherein, In the sub-pixel, the arrangement order of the first edge and the second edge is different from the arrangement order of the third edge and the fourth edge.

22. The display substrate according to any one of claims 1-20, wherein, The shape of the pixel opening projected onto the substrate includes an inverted ellipse, the third edge is arc-shaped, the fourth edge is arc-shaped, and the radius of curvature of the third edge is smaller than the radius of curvature of the fourth edge.

23. The display substrate according to any one of claims 1-22, wherein, Each of the sub-pixels further includes: The anode is located between the pixel defining layer and the substrate. An organic light-emitting layer is located on the side of the anode away from the substrate; and The cathode is located on the side of the organic light-emitting layer away from the anode. The pixel opening exposes at least a portion of the anode, and the organic light-emitting layer is disposed in contact with the anode through the pixel opening.

24. A display substrate, comprising: Substrate; A pixel defining layer is located on one side of the substrate. An insulating layer is located on the side of the pixel defining layer away from the substrate. as well as The black matrix layer is located on the side of the insulating layer away from the pixel defining layer; The display substrate includes a plurality of sub-pixels, each sub-pixel including a pixel opening located in the pixel defining layer and a black matrix opening located in the black matrix layer, wherein the orthographic projection of the pixel opening on the substrate and the orthographic projection of the black matrix opening on the substrate at least partially overlap; The planar shape of the black matrix opening has a first major axis, and the dimension of the black matrix opening in the extension direction of the first major axis is the maximum dimension of the black matrix opening. The black matrix opening has a first endpoint and a second endpoint in the extension direction of the first major axis. The edge of the black matrix opening is divided into a first edge and a second edge by the first endpoint and the second endpoint, and the length of the first edge is equal to the length of the second edge. The first endpoint has a first shortest distance between its orthographic projection on the substrate and the pixel opening has a second shortest distance between its orthographic projection on the substrate and the pixel opening has a third shortest distance between their respective orthographic projections on the substrate. There is a third shortest distance between the orthographic projection of the first edge on the substrate and the orthographic projection of the pixel opening on the substrate, and the third shortest distance is not equal to at least one of the first shortest distance and the second shortest distance.

25. The display substrate according to claim 24, wherein, The planar shape of the pixel opening has a second major axis, and the size of the pixel opening in the extension direction of the second major axis is the maximum size of the pixel opening. The pixel opening has a third endpoint and a fourth endpoint in the extension direction of the second major axis. The edge of the pixel opening is divided into a third edge and a fourth edge by the third endpoint and the fourth endpoint, and the length of the third edge is greater than the length of the fourth edge.

26. The display substrate according to claim 24, wherein, The shape of the pixel opening projected onto the substrate includes an inverted ellipse, the third edge is arc-shaped, the fourth edge is arc-shaped, and the radius of curvature of the third edge is smaller than the radius of curvature of the fourth edge.

27. The display substrate according to claim 24, wherein, The planar shape of the pixel opening has a second major axis, and the size of the pixel opening in the extension direction of the second major axis is the maximum size of the pixel opening. The pixel opening has a third endpoint and a fourth endpoint in the extension direction of the second major axis. The edge of the pixel opening is divided into a third edge and a fourth edge by the third endpoint and the fourth endpoint, and the length of the third edge and the length of the fourth edge are equal.

28. The display substrate according to any one of claims 24-27, wherein, The plurality of sub-pixels includes a plurality of first color sub-pixels, a plurality of second color sub-pixels, and a plurality of third color sub-pixels. The plurality of first major axes of the plurality of black matrix openings of the plurality of first color sub-pixels include M orientations, where M is a positive integer greater than or equal to 2.

29. The display substrate according to any one of claims 28, wherein, The plurality of sub-pixels includes a plurality of minimum repeating units, each of the minimum repeating units including at least M first color sub-pixels, and the at least M first major axes of the at least M first color sub-pixels include M orientations, wherein M satisfies: M = x 2 Or M = 2x 2 x is a positive integer greater than or equal to 2.

30. A display device comprising a display substrate according to any one of claims 1-29.

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