Display module and display device

Abstract

The application provides a display module and a display device, relates to the technical field of display, and improves the phenomenon of inconsistent brightness under different observation angles. The display module comprises a display panel and a black matrix, wherein the display panel comprises a substrate and a sub-pixel which are stacked, and the sub-pixel comprises an anode and a light-emitting layer which are stacked; the black matrix is stacked on the side of the sub-pixel away from the substrate, the black matrix comprises an opening, the opening exposes the sub-pixel, and the black matrix further comprises a side wall which is used for forming the opening; the distance between the orthographic projection of the light-emitting layer on the substrate and the orthographic projection of the side wall on the substrate at each position is uneven, and / or the inclination angle of each position of the side wall relative to the substrate is uneven, and the distance and the inclination angle are both dependent on the flatness height of the anode, thereby improving the phenomenon of inconsistent brightness under different observation angles.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display module and a display device. Background Technology

[0002] In recent years, organic light-emitting display panels have gradually become the mainstream product in the display field due to their advantages such as being thinner and lighter, brighter, lower power consumption, faster response, higher definition, better flexibility, and higher luminous efficiency, and because they can meet users' new demands for display technology.

[0003] However, current organic light-emitting display panels suffer from inconsistent brightness at different viewing angles. Summary of the Invention

[0004] To address the aforementioned technical problems, this application is proposed. Embodiments of this application provide a display module and a display device.

[0005] In a first aspect, one embodiment of this application provides a display module, the display module comprising: a display panel including a substrate and sub-pixels stacked together, the sub-pixels including anodes and light-emitting layers stacked together; a black matrix stacked on the side of the sub-pixels away from the substrate, including an opening that exposes the sub-pixels, the black matrix further including sidewalls for forming the openings; wherein, the distance between the orthographic projection of the light-emitting layer on the substrate and the orthographic projection of the sidewalls on the substrate is uneven at various positions, and / or the tilt angle of each position of the sidewalls relative to the substrate is uneven, the distance and tilt angle both depending on the flatness height of the anode, the flatness height being the protrusion height of the protrusion position in the anode.

[0006] In conjunction with the first aspect, in some implementations of the first aspect, distance and flatness are highly negatively correlated.

[0007] In conjunction with the first aspect, in some implementations of the first aspect, the orthographic projection shape of the light-emitting layer on the substrate is shape one, and the orthographic projection shape of the sidewall on the substrate near the edge of shape one is shape two. Shape one and shape two have the same shape, and the edges of shape one and shape two are parallel to each other. The distance between the edge of shape one near the region with greater flatness height and the edge of shape two near the region with greater flatness height is smaller, and the distance between the edge of shape one near the region with less flatness height and the edge of shape two near the region with less flatness height is larger.

[0008] Preferably, the shapes of shape one and shape two are quadrilaterals or circles.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, the tilt angle and flatness are highly negatively correlated.

[0010] In conjunction with the first aspect, in some implementations of the first aspect, the orthographic projection shape of the light-emitting layer on the substrate is shape one, the sidewall includes at least one sub-sidewall, and the orthographic projection of at least one sub-sidewall on the substrate near the edge of shape one is shape two. Shape one and shape two have the same shape, and the edges of shape one and shape two are correspondingly parallel. The sub-sidewall near the region with greater flatness height has a smaller tilt angle, and the sub-sidewall near the region with smaller flatness height has a larger tilt angle.

[0011] Preferably, the shapes of shape one and shape two are quadrilaterals or circles.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, the display panel includes a plurality of sub-pixels, including red sub-pixels, green sub-pixels, and blue sub-pixels. For areas in the red sub-pixels, green sub-pixels, and blue sub-pixels with the same flatness height, the distance between the orthographic projection of the light-emitting layer of the green sub-pixel onto the substrate and the orthographic projection of the sidewall onto the substrate is the largest, the distance between the orthographic projection of the light-emitting layer of the red sub-pixel onto the substrate and the orthographic projection of the sidewall onto the substrate is the second largest, and the distance between the orthographic projection of the light-emitting layer of the blue sub-pixel onto the substrate and the orthographic projection of the sidewall onto the substrate is the smallest.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, the display panel includes multiple sub-pixels, including red sub-pixels, green sub-pixels, and blue sub-pixels. For areas in the red sub-pixels, green sub-pixels, and blue sub-pixels with the same flatness height, the tilt angle of the sidewall corresponding to the green sub-pixel is the largest, the tilt angle of the sidewall corresponding to the red sub-pixel is the second largest, and the tilt angle of the sidewall corresponding to the blue sub-pixel is the smallest.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, the display panel further includes: a stacked array substrate and a light-emitting device layer, wherein the array substrate includes a stacked substrate and metal traces, the light-emitting device layer includes sub-pixels, the metal traces are located between the substrate and the anode, the anode is located between the metal traces and the light-emitting layer, and the partial orthographic projection of the anode on the substrate and the orthographic projection of the metal traces on the substrate overlap.

[0015] In conjunction with the first aspect, in some implementations of the first aspect, the minimum tilt angle is 60 degrees and the maximum is 70 degrees.

[0016] Secondly, one embodiment of this application provides a display device, which includes a display module as mentioned in any of the above embodiments.

[0017] The display module provided in this application includes a display panel and a black matrix. The display panel includes a substrate and sub-pixels stacked together. The sub-pixels include an anode and a light-emitting layer stacked together. The black matrix is ​​stacked on the side of the sub-pixels away from the substrate. The black matrix includes an opening that exposes the sub-pixels. The black matrix also includes sidewalls for forming the openings. The distance between the orthographic projection of the light-emitting layer on the substrate and the orthographic projection of the sidewall on the substrate is uneven at various positions, and / or the tilt angle of the sidewall relative to the substrate is uneven at various positions. Both the distance and the tilt angle depend on the flatness height of the anode. The flatness height is the protrusion height of the protrusion position in the anode, thereby improving the phenomenon of inconsistent brightness under different viewing angles and making the brightness tend to be consistent under different viewing angles. Attached Figure Description

[0018] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0019] Figure 1 The diagram shown is a structural schematic of a display module provided in an embodiment of this application.

[0020] Figure 2 The diagram shown is a schematic diagram of the orthographic projection of the light-emitting layer of a sub-pixel onto the substrate and the orthographic projection of the sidewall onto the substrate provided in an embodiment of this application.

[0021] Figure 3a The figure shown is a schematic diagram of brightness variation curves under different observation directions in related technologies.

[0022] Figure 3b The figure shown is a schematic diagram of the brightness variation curves under different observation directions in this application.

[0023] Figure 4 The diagram shown is a schematic diagram of the structure of a display device provided in an embodiment of this application.

[0024] Reference numerals: Display module 110; Display panel 111; Substrate 1111; Subpixel 1112; Anode A; Black matrix 112; Sidewall B; Metal trace C; Light-emitting layer D; Cathode E; Encapsulation layer 1113; Filter 1114; First distance d1; Second distance d2; Third distance d3; Fourth distance d4; First side L1; Second side L2; Third side L3; Fourth side L4; Display device 100. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods and means well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0029] Figure 1 The diagram shown is a structural schematic of a display module provided in one embodiment of this application. Figure 1 As shown, the display module 110 provided in this application embodiment includes: a display panel 111, including a stacked substrate 1111 and sub-pixels 1112, the sub-pixels 1112 including a stacked anode A and a light-emitting layer D; a black matrix 112, stacked on the side of the sub-pixels 1112 away from the substrate 1111, including an opening that exposes the sub-pixels 1112, the black matrix 112 also includes a sidewall B, the sidewall B being used to form the opening; wherein, the distance between the orthographic projection of the light-emitting layer D on the substrate 1111 and the orthographic projection of the sidewall B on the substrate 1111 at various positions is not uniform, and / or the tilt angle of each position of the sidewall B relative to the substrate 1111 is not uniform, the distance and tilt angle both depend on the flatness height of the anode A, the flatness height being the protrusion height of the protrusion position in the anode A.

[0030] This application improves the phenomenon of inconsistent brightness under different observation angles by setting the flatness height of the anode A, the distance between the orthogonal projection of the light-emitting layer D on the substrate 1111 and the orthogonal projection of the sidewall B on the substrate 1111 at various positions, and / or the tilt angle of each position of the sidewall B relative to the substrate 1111, thereby making the brightness tend to be consistent under different observation angles.

[0031] In this embodiment, the tilt angle is the angle formed between each position of the sidewall B and the surface of the substrate 1111 near the sub-pixel 1112. For example... Figure 1As shown, the tilt angle is the angle formed between each position of the sidewall B and the upper surface of the substrate 1111.

[0032] In one embodiment of this application, the observation angle is the angle between the user's line of sight and the thickness direction of the substrate 1111.

[0033] exist Figure 1 In one embodiment of this application, the display panel 111 further includes: a stacked array substrate and a light-emitting device layer, wherein the array substrate includes a stacked substrate 1111 and a metal trace C, the light-emitting device layer includes a sub-pixel 1112, the metal trace C is located between the substrate 1111 and the anode A, the anode A is located between the metal trace C and the light-emitting layer D, and the partial orthographic projection of the anode A on the substrate 1111 and the orthographic projection of the metal trace C on the substrate 1111 overlap.

[0034] It is understood that in the embodiments of this application, the number of film layers of the metal trace C can be two, three, or four, without further limitation, and different metal film layers are isolated by an insulating layer. Because the metal traces C are arranged in an interlaced manner, the areas where the metal traces C are interlaced protrude while other areas are recessed, resulting in an uneven film layer of the metal traces C. This, in turn, leads to an uneven anode A prepared after the metal traces C, which in turn causes the brightness attenuation rate of the light emitted by the light-emitting layer D to be inconsistent at different locations with varying flatness, resulting in inconsistent brightness at different observation angles.

[0035] In one embodiment, the metal trace C has four film layers. The metal trace C in the layer farthest from the substrate 1111 is most likely to affect the flatness height of the anode A. Specifically, this metal trace C is generally used as a VDD trace to improve brightness uniformity, and its material is a Ti-Al-Ti stacked structure.

[0036] In this application, the anode A is greatly affected by the metal trace C. Therefore, the above-mentioned distance and tilt angle are set based on the flatness height of the anode A, thereby improving the reliability of improving the brightness inconsistency phenomenon.

[0037] This application provides an application scenario for the display module 110, and specifically solves the problem of inconsistent brightness in the display module 110 with the overlapping of the partial orthographic projection of the anode A on the substrate 1111 and the orthographic projection of the metal trace C on the substrate 1111.

[0038] exist Figure 1 In one embodiment of this application, the sub-pixel 1112 further includes a light-emitting layer D and a cathode E. The light-emitting layer D is stacked on the side of the anode A away from the substrate 1111, and the cathode E is stacked on the side of the light-emitting layer D away from the anode A.

[0039] exist Figure 1 In one embodiment of this application, the display panel 111 further includes an encapsulation layer 1113, a pixel definition layer X, and a planarization layer P. The encapsulation layer 1113 is stacked on the side of the sub-pixel 1112 away from the substrate 1111. The pixel definition layer X is located around the sub-pixel 1112. The planarization layer P is located between the metal trace C and the anode A. It is understood that the planarization layer P can only planarize a certain degree of unevenness, but it cannot make the surface of the planarization layer P near the anode A completely flat. That is, the surface of the planarization layer P near the anode A still has a small degree of unevenness, resulting in unevenness in the anode A prepared after the planarization layer P.

[0040] The display module 110 provided in one embodiment of this application further includes a filter 1114, which is stacked on the light-emitting side of the display panel 111, that is, the side of the encapsulation layer 1113 away from the substrate 1111, and the filter 1114 fills the opening.

[0041] In one embodiment of this application, distance and flatness are negatively correlated.

[0042] Specifically, for areas with greater flatness height, the distance should be smaller; for areas with less flatness height, the distance should be larger. This is because areas with greater flatness height have a slower brightness decay rate, requiring a smaller distance to accelerate the brightness decay in that area; while areas with less flatness height have a faster brightness decay rate, requiring a larger distance to slow down the brightness decay in that area. This ensures that the brightness decay rate at locations with different flatness heights tends to be more uniform.

[0043] It should be noted that in this application, the flatness height of each position of the anode A was obtained by observation using a 3D microscope.

[0044] Figure 2 The diagram shows a schematic representation of the orthographic projection of the light-emitting layer of a sub-pixel onto the substrate and the orthographic projection of its sidewalls onto the substrate, according to an embodiment of this application. (Combined with...) Figure 1 and 2As shown, in one embodiment of this application, the orthographic projection shape of the light-emitting layer D on the substrate 1111 is shape one, and the orthographic projection shape of the sidewall B on the substrate 1111 near the edge of shape one is shape two. That is, the orthographic projection shape of the bottom edge of the sidewall B on the substrate 1111 is shape two. Shape one and shape two have the same shape, and the edges of shape one and shape two are correspondingly parallel. The distance between the edge of shape one near the region with greater flatness height and the edge of shape two near the region with greater flatness height is smaller, and the distance between the edge of shape one near the region with less flatness height and the edge of shape two near the region with less flatness height is larger. Preferably, the shapes of shape one and shape two are quadrilaterals or circles, such as rectangles, rhombuses, figures, or ellipses.

[0045] Specifically, taking a mobile phone as an example, and in the scenario where the mobile phone screen is facing the user, the left side of the screen is the 0° viewing direction, the right side of the screen is the 180° viewing direction, the top of the screen is the 90° viewing direction, and the bottom of the screen is the 270° viewing direction.

[0046] Combination Figure 1 and 2 As shown, taking shapes one and two as quadrilaterals as an example, there are four distances between shapes one and two: the first distance d1, the second distance d2, the third distance d3, and the fourth distance d4. Figure 2 In the diagram, the flatness height of each position of the anode A is added to the orthographic projection of the light-emitting layer D onto the substrate 1111. The flatness height of each position of the anode A obtained by 3D microscopy shows that the darker the color, the greater the flatness height, and the slower the brightness decay rate in that area; conversely, the lighter the color, the smaller the flatness height, and the faster the brightness decay rate in that area. Therefore, from diagram 2, we know that the first distance d1 < the second distance d2 < the fourth distance d4 < the third distance d3.

[0047] This application embodiment solves the problem of inconsistent brightness in a display module 110 where the orthographic projection shape of the light-emitting layer D and the sidewall B on the substrate 1111 is a quadrilateral. Furthermore, for each side of the quadrilateral, the distance between each position within that side is set to be equal, thereby simplifying the manufacturing process.

[0048] Specifically, the distance to the edge can be set based on the median of the flatness height of the region near the edge. It is understood that the flatness height of the region near the edge varies, so the median is used; however, in other embodiments, the average flatness height of the region near the edge can be used.

[0049] In one embodiment of this application, the tilt angle and flatness are highly negatively correlated.

[0050] Specifically, for areas with greater flatness height, the tilt angle is smaller; for areas with less flatness height, the tilt angle is larger. This is because areas with greater flatness height have a slower brightness decay rate, requiring a smaller tilt angle to accelerate the brightness decay rate in that area; while areas with less flatness height have a faster brightness decay rate, requiring a larger tilt angle to slow down the brightness decay rate in that area, thus making the brightness decay rate of different locations with different flatness heights tend to be more uniform.

[0051] Combination Figure 1 and 2 As shown in one embodiment of this application, the orthographic projection shape of the light-emitting layer D on the substrate 1111 is shape one. The sidewall B includes at least one sub-sidewall. The orthographic projection of the at least one sub-sidewall on the substrate 1111 near the edge of shape one is shape two. That is, the orthographic projection shape of the bottom edge of the sidewall B on the substrate 1111 is shape two. Shape one and shape two have the same shape, and the edges of shape one and shape two are correspondingly parallel. The sub-sidewall near the region with greater flatness height has a smaller tilt angle; the sub-sidewall near the region with less flatness height has a larger tilt angle. Preferably, the shapes of shape one and shape two are quadrilaterals or circles, such as rectangles, rhombuses, figures, or ellipses.

[0052] Specifically, taking the quadrilateral shape of both shape one and shape two as an example, sidewall B includes four sub-sidewalls. The orthographic projections of these four sub-sidewalls onto the substrate 1111, closest to the edge of shape one, are respectively the first side L1, the second side L2, the third side L3, and the fourth side L4. The tilt angle of the sub-sidewall whose orthographic projection is closest to the edge of shape one (the first side L1) is the first tilt angle; the tilt angle of the sub-sidewall whose orthographic projection is closest to the edge of shape one (the second side L2) is the second tilt angle; the tilt angle of the sub-sidewall whose orthographic projection is closest to the edge of shape one (the third side L3) is the third tilt angle; and the tilt angle of the sub-sidewall whose orthographic projection is closest to the edge of shape one (the fourth side L4) is the fourth tilt angle. (Combined with...) Figure 2 The results of the flatness height at various positions of anode A show that the darker the color, the greater the flatness height, and the slower the brightness decay rate in that area; conversely, the lighter the color, the smaller the flatness height, and the faster the brightness decay rate in that area. Therefore, based on the color depth of each region in Figure 2, we know that the first tilt angle < the second tilt angle < the fourth tilt angle < the third tilt angle.

[0053] This application embodiment solves the problem of inconsistent brightness in a display module 110 where the bottom edge of the light-emitting layer D and the sidewall B are quadrilaterals projected onto the substrate 1111. Furthermore, for each of the four sub-sidewalls, the tilt angles at each position are set to be equal, thereby simplifying the manufacturing process.

[0054] Specifically, the tilt angle of the sub-sidewall can be set based on the median of the flatness height of the region near the sub-sidewall. It is understood that the flatness height of the region near the sub-sidewall varies, so the median is taken; of course, in other embodiments, the average flatness height of the region near the sub-sidewall can be used.

[0055] Through in-depth research, the inventors discovered that because the wavelength of red light > the wavelength of green light > the wavelength of blue light, theoretical calculations show that: for every degree the pixel opening area of ​​the red sub-pixel is tilted relative to the substrate 1111, the brightness decreases by 8.15%; for every degree the pixel opening area of ​​the green sub-pixel is tilted relative to the substrate 1111, the brightness decreases by 6.44%; and for every degree the pixel opening area of ​​the blue sub-pixel is tilted relative to the substrate 1111, the brightness decreases by 5.99%. Since the degree of brightness decrease varies for each degree the pixel opening area of ​​different color sub-pixels 1112 is tilted relative to the substrate 1111, the distance between the orthographic projection of the emitting layer D of the different color sub-pixels 1112 onto the substrate 1111 and the orthographic projection of the sidewall B onto the substrate 1111 is different for areas with the same flatness height in the different color sub-pixels 1112.

[0056] Specifically, in one embodiment of this application, the display panel 111 includes a plurality of sub-pixels 1112, which include red sub-pixels, green sub-pixels, and blue sub-pixels. For areas with the same flatness height in the red, green, and blue sub-pixels, the distance between the orthographic projection of the light-emitting layer D of the green sub-pixel onto the substrate 1111 and the orthographic projection of the sidewall B onto the substrate 1111 is the largest; the distance between the orthographic projection of the light-emitting layer D of the red sub-pixel onto the substrate 1111 and the orthographic projection of the sidewall B onto the substrate 1111 is the second largest; and the distance between the orthographic projection of the light-emitting layer D of the blue sub-pixel onto the substrate 1111 and the orthographic projection of the sidewall B onto the substrate 1111 is the smallest. Multiple experiments have shown that this embodiment of the application is beneficial in making the brightness attenuation of the red, green, and blue sub-pixels more consistent, thereby helping to improve the phenomenon of inconsistent brightness under different viewing angles.

[0057] In other embodiments, for regions with the same flatness height in different color sub-pixels 1112, the tilt angle of the sidewall B corresponding to the different color sub-pixels 1112 is different.

[0058] Specifically, in one embodiment of this application, the display panel 111 includes a plurality of sub-pixels 1112, which include red sub-pixels, green sub-pixels, and blue sub-pixels. For areas in the red, green, and blue sub-pixels where the flatness height is the same, the tilt angle of the sidewall B corresponding to the green sub-pixel is the largest, followed by the tilt angle of the sidewall B corresponding to the red sub-pixel, and the tilt angle of the sidewall B corresponding to the blue sub-pixel is the smallest. Multiple experiments have shown that this embodiment also helps to make the brightness attenuation of the red, green, and blue sub-pixels more consistent, thereby improving the phenomenon of inconsistent brightness under different viewing angles.

[0059] In one embodiment of this application, the minimum tilt angle is 60 degrees and the maximum is 70 degrees; for example, it can be 60 degrees, 62.5 degrees, 63 degrees, 65 degrees...68.5 degrees, 69 degrees, 70 degrees. Multiple experiments have shown that when the tilt angle is within the above-mentioned range, the consistency of brightness is better at different observation angles.

[0060] Figure 3a The figure shown is a schematic diagram of brightness variation curves under different observation directions in related technologies. Figure 3b The figure shown is a schematic diagram of the brightness variation curves under different observation directions in this application.

[0061] It should be noted that the different observation directions refer to the 0°, 90°, 180°, and 270° observation directions mentioned above. Figure 3a and 3b Each section includes four curves indicating changes in brightness: the brightness change curves at 0°, 90°, 180°, and 270° observation directions. Figure 3a It can be seen that the brightness varies considerably among these four curves. From... Figure 3b It can be seen that the brightness variation among the four curves is relatively small.

[0062] Therefore, by Figure 3a and 3b As can be seen, the brightness variation of the display module 110 provided in this application under different observation directions is significantly smaller than that of the display module 110 in related technologies under different observation directions. Therefore, the display module 110 provided in this application improves the phenomenon of inconsistent brightness under different observation angles (which can also be regarded as different observation directions), making the brightness tend to be consistent under different observation angles.

[0063] Figure 4 The diagram shown is a structural schematic of a display device provided in an embodiment of this application. Figure 4As shown, one embodiment of this application also provides a display device 100. It is understood that the display panel 111 can be applied to the display device 100, which can be, for example, any product or component with display functionality such as a mobile terminal, tablet computer, computer monitor, television, wearable device, or information kiosks. The display device 100 includes the display panel 111 as in any embodiment of this application, and its technical principles and effects are similar, so they will not be described again here.

[0064] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0065] It should also be noted that in this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered equivalent solutions to this application. Although several exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations therein.

Claims

1. A display module, characterized by include: A display panel includes a stacked substrate and sub-pixels, the sub-pixels including a stacked anode and a light-emitting layer; A black matrix, stacked on the side of the sub-pixel away from the substrate, includes an opening that exposes the sub-pixel, and the black matrix also includes sidewalls for forming the opening; Wherein, the distance between the orthographic projection of the light-emitting layer on the substrate and the orthographic projection of the sidewall on the substrate is uneven at various positions, and / or the tilt angle of the sidewall relative to the substrate is uneven at various positions. The distance and the tilt angle both depend on the flatness height of the anode, and the flatness height is the protrusion height of the protrusion position in the anode. The distance and the flatness are negatively correlated.

2. The display module according to claim 1, characterized in that, The orthographic projection of the light-emitting layer onto the substrate is shape one, and the orthographic projection of the sidewall onto the substrate near the edge of shape one is shape two. Shape one and shape two have the same shape, and the edges of shape one and shape two are parallel to each other. The distance between the edge of shape one that is closer to the region with greater flatness height and the edge of shape two that is closer to the region with greater flatness height is smaller, and the distance between the edge of shape one that is closer to the region with less flatness height and the edge of shape two that is closer to the region with less flatness height is larger.

3. The display module according to claim 2, characterized in that, The shapes of shape one and shape two are either quadrilaterals or circles.

4. The display module according to any one of claims 1 to 3, characterized in that, The tilt angle and the flatness are negatively correlated.

5. The display module according to claim 4, characterized in that, The orthographic projection shape of the light-emitting layer on the substrate is shape one. The sidewall includes at least one sub-sidewall. The orthographic projection of the at least one sub-sidewall on the substrate near the edge of shape one is shape two. Shape one and shape two have the same shape, and the edges of shape one and shape two are parallel to each other. The sub-sidewall closer to the region with greater flatness height has a smaller tilt angle, and the sub-sidewall closer to the region with smaller flatness height has a larger tilt angle.

6. The display module according to any one of claims 1 to 3, characterized in that, The system includes multiple sub-pixels, including red, green, and blue sub-pixels. For regions in the red, green, and blue sub-pixels where the flatness height is the same, the distance between the orthographic projection of the light-emitting layer of the green sub-pixel onto the substrate and the orthographic projection of the sidewall onto the substrate is the largest. The distance between the orthographic projection of the light-emitting layer of the red sub-pixel onto the substrate and the orthographic projection of the sidewall onto the substrate is the second largest. The distance between the orthographic projection of the light-emitting layer of the blue sub-pixel onto the substrate and the orthographic projection of the sidewall onto the substrate is the smallest.

7. The display module according to any one of claims 1 to 3, characterized in that, The system includes multiple sub-pixels, including red sub-pixels, green sub-pixels, and blue sub-pixels. For the regions in the red sub-pixels, green sub-pixels, and blue sub-pixels where the flatness height is the same, the tilt angle of the sidewall corresponding to the green sub-pixel is the largest, the tilt angle of the sidewall corresponding to the red sub-pixel is the second largest, and the tilt angle of the sidewall corresponding to the blue sub-pixel is the smallest.

8. The display module according to any one of claims 1 to 3, characterized in that, The display panel further includes: a stacked array substrate and a light-emitting device layer, wherein the array substrate includes the stacked substrate and metal traces, the light-emitting device layer includes the sub-pixels, the metal traces are located between the substrate and the anode, the anode is located between the metal traces and the light-emitting layer, and the partial orthographic projection of the anode on the substrate and the orthographic projection of the metal traces on the substrate overlap.

9. The display module according to any one of claims 1 to 3, characterized in that, The minimum tilt angle is 60 degrees and the maximum is 70 degrees.

10. A display device, characterized in that, Includes the display module as described in any one of claims 1 to 9 above.

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