Display panel and display device

Abstract

The application provides a display panel and a display device. The display panel comprises a substrate, a planarization layer and a pixel definition layer. The planarization layer is arranged on one side of the pixel definition layer, and the pixel definition layer is arranged on the side of the planarization layer away from the substrate. The pixel definition layer comprises an isolation portion and a pixel opening formed by the isolation portion. The surface of the planarization layer towards the pixel definition layer is provided with a convex portion towards the pixel definition layer, and the convex portion is located in the pixel opening. The display panel provided by the application is provided with the convex portion in the planarization layer in the pixel opening. Therefore, the first electrode and the light emitting structure corresponding to the light emitting unit in the pixel opening can be arranged on the convex portion of the planarization layer. On the premise that the size of the pixel opening is fixed, the convex portion can improve the light emitting area of the light emitting unit. Thus, on the premise that the pixel density of the display panel is not affected, the required display brightness can be achieved without increasing the current, the heat generation of the display panel is reduced, and the service life of the display panel is improved.

Description

Technical Field

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

[0002] Organic light-emitting diode (OLED) display devices have advantages such as simple structure, fast response speed, active light emission, and low power consumption, and have been widely used in the display field of electronic devices such as mobile phones, tablets, and televisions.

[0003] An OLED display panel includes a substrate and a pixel layer disposed on one side of the substrate. Light-emitting units (LEDs) for emitting light are located within openings in the pixel layer. During operation, to improve the display brightness, it is typically necessary to increase the current density flowing to the LEDs. This increases the heat generated by the display panel and reduces its lifespan. Summary of the Invention

[0004] This application provides a display panel and display device that can effectively improve the service life of the display panel.

[0005] In a first aspect, this application provides a display panel, comprising: a substrate; a planarization layer disposed on one side of the substrate; and a pixel definition layer disposed on the side of the planarization layer facing away from the substrate, wherein the pixel definition layer includes an isolation portion and a pixel opening formed by the isolation portion; wherein a protrusion is provided on the surface of the planarization layer facing the pixel definition layer, and the protrusion is located within the pixel opening.

[0006] In some embodiments, the protrusion has a top surface facing away from the substrate and a bottom surface facing the substrate, the orthographic projection of the top surface onto the bottom surface is located inside the bottom surface, and the area of ​​the top surface is smaller than the area of ​​the bottom surface; optionally, the protrusion further includes an inclined surface connecting the top surface and the bottom surface, the inclined surface being a plane or an arcuate surface.

[0007] In some embodiments, the angle between the inclined reference surface and the bottom surface is a first inclination angle θ1, and the value of the first inclination angle θ1 is 15°≤θ1≤45°; or the angle between the tangent of the inclined surface and the bottom surface is a second inclination angle θ2, and the value of the second inclination angle θ2 is 15°≤θ2≤45°.

[0008] In some embodiments, the display panel further includes a light-emitting layer comprising a plurality of light-emitting units located within pixel openings and covering the protrusions; optionally, the light-emitting units form display sub-regions with an area larger than the area of ​​the corresponding pixel openings; the spacing between at least two adjacent display sub-regions is zero.

[0009] In some embodiments, the light-emitting unit includes a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit that emit different colors; the pixel opening includes a first opening for accommodating the first light-emitting unit, a second opening for accommodating the second light-emitting unit, and a third opening for accommodating the third light-emitting unit; the first light-emitting unit forms a first display sub-region, and the orthographic projection of the first opening on the substrate is located within the orthographic projection of the first display sub-region on the substrate; the second light-emitting unit forms a second display sub-region, and the orthographic projection of the second opening on the substrate is located within the orthographic projection of the second display sub-region on the substrate; the third light-emitting unit forms a third display sub-region, and the orthographic projection of the third opening on the substrate is located within the orthographic projection of the third display sub-region on the substrate; the first tilt angle θ1 or the second tilt angle θ2 of the protrusions in the first opening, the second opening, and the third opening are not equal, and / or the number of protrusions in the first opening, the second opening, and the third opening is not equal; optionally, the spacing between any adjacent first display sub-region and second display sub-region, or between the first display sub-region and the third display sub-region, or between the second display sub-region and the third display sub-region is zero.

[0010] In some embodiments, the first light-emitting unit emits red light, the second light-emitting unit emits blue light, and the third light-emitting unit emits green light; the number of protrusions per unit area in the first opening is s1, the number of protrusions per unit area in the second opening is s2, and the number of protrusions per unit area in the third opening is s3, where s1 < s2 < s3.

[0011] In some embodiments, the protrusion is at least one of frustum or frustum pyramidal shape; or, the orthographic projection of the protrusion onto the substrate is annular.

[0012] In some embodiments, the height h of the protrusion satisfies: 1μm≤h≤2μm.

[0013] In some embodiments, multiple protrusions are located within the same pixel opening; alternatively, multiple protrusions are spaced apart within the same pixel opening, or the orthographic projection of the protrusions on the substrate is annular, and multiple protrusions are nested within the same pixel opening.

[0014] Secondly, this application also provides a display device, including the display panel as described above.

[0015] The display panel and display device provided in this application have a protrusion in the planarization layer inside the pixel opening. The first electrode and light-emitting structure of the light-emitting unit inside the pixel opening can be disposed on the protrusion of the planarization layer. Under the premise that the size of the pixel opening is fixed, the light-emitting area of ​​the light-emitting unit can be increased. In this way, without affecting the pixel density of the display panel, the required display brightness can be achieved without increasing the current, reducing the heat generation of the display panel and improving the service life of the display panel. Attached Figure Description

[0016] The features, advantages, and technical effects of exemplary embodiments of the present application will now be described with reference to the accompanying drawings. In the drawings, the same parts are referred to by the same reference numerals. The drawings are not drawn to scale.

[0017] Figure 1 This is a cross-sectional structural diagram of a display panel provided in an embodiment of this application;

[0018] Figure 2 A cross-sectional view of another display panel provided in an embodiment of this application;

[0019] Figure 3 A cross-sectional view of another display panel provided in an embodiment of this application;

[0020] Figure 4 This is a cross-sectional view of another display panel according to an embodiment of this application;

[0021] Figure 5a This is a schematic diagram of the structure of a protrusion in a display panel provided in an embodiment of this application;

[0022] Figure 5b for Figure 5a A cross-sectional view of the central convex portion perpendicular to the substrate.

[0023] Figure 6a This is a schematic diagram of another type of protrusion in a display panel provided in an embodiment of this application;

[0024] Figure 6b for Figure 6a A cross-sectional view of the central convex portion perpendicular to the substrate.

[0025] Figure 7a A schematic diagram of another type of protrusion in a display panel provided in an embodiment of this application;

[0026] Figure 7b for Figure 7a A cross-sectional view of the central convex portion perpendicular to the substrate.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Substrate;

[0029] 2. Planarization layer; 21. Protrusion; 21a. Top surface; 21b. Bottom surface; 21c. Inclined surface;

[0030] 3. Pixel definition layer; 31. Isolation section; 32. Pixel aperture;

[0031] 4. Light-emitting layer; 41. Light-emitting unit; 411. First electrode; 412. Light-emitting structure; 413. Second electrode. Detailed Implementation

[0032] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0033] Furthermore, for the sake of understanding and ease of description, the dimensions and thicknesses of each configuration shown in the figures are arbitrarily illustrated, but the concept of this application is not limited thereto. In the figures, the thicknesses of layers, films, panels, and regions, etc., are enlarged for clarity. In the figures, the thicknesses of some layers and regions are enlarged for better understanding and ease of description.

[0034] It is understandable that when an element such as a layer, film, region, or substrate is described as being "on" another element, the element may be directly on that other element, or there may be intermediate elements present. In contrast, when an element is described as being "directly on" another element, there are no intermediate elements present. Furthermore, throughout the specification, the phrase "on" the target element indicates that it is positioned above or below the target element and does not necessarily indicate that it is positioned "on the upper side" based on the direction of gravity.

[0035] Furthermore, unless explicitly stated otherwise, the word "including" will be understood to include the stated elements but not exclude any other elements.

[0036] The applicant's research revealed that in existing technologies, to increase the pixel density (PPI, Pixels Per Inch) of organic light-emitting panels, the pixel size is typically reduced. A smaller pixel size leads to a smaller light-emitting area of ​​the light-emitting unit, while maintaining the brightness of the display panel usually requires increasing the current of the light-emitting unit. This results in a decrease in the light-emitting area of ​​the unit while increasing the current, leading to a higher current density. During use, this can cause increased heat generation in the display panel, reducing its lifespan.

[0037] To address the aforementioned problems, this application provides a display panel and a display device, and the embodiments will be described below with reference to the accompanying drawings. The display panel provided in this application can be an OLED display panel.

[0038] Figure 1 This diagram shows a cross-sectional view of a display panel according to an embodiment of the present application.

[0039] like Figure 1 As shown in the figure, a display panel provided in this application embodiment includes: a substrate 1, a planarization layer 2, and a pixel definition layer 3. The planarization layer 2 is disposed on one side of the substrate 1. The pixel definition layer 3 is disposed on the side of the planarization layer 2 facing away from the substrate 1, and the pixel definition layer 3 includes an isolation portion 31 and a pixel opening 32 formed by the isolation portion 31. A protrusion 21 is provided on the surface of the planarization layer 2 facing the pixel definition layer 3, and the protrusion 21 is located within the pixel opening 32.

[0040] Figure 2 A cross-sectional view of another display panel according to an embodiment of this application is shown.

[0041] like Figure 2 As shown, the substrate 1 can be an array substrate, and the display panel can further include a light-emitting layer 4. The light-emitting layer 4 includes multiple light-emitting units 41, which are located within the pixel opening 32 and cover the protrusions 21. The array substrate 1 can provide power to the light-emitting units 41. The protrusions 21 can be block-shaped, strip-shaped, or have other shapes. One protrusion 21 or multiple protrusions 21 can be provided within a pixel opening 32. The multiple protrusions 21 can be arranged regularly or irregularly.

[0042] The light-emitting unit 41 includes a first electrode 411, a light-emitting structure 412, and a second electrode 413. The light-emitting structure 412 is used to emit light. By providing a protrusion 21 on the planarization layer 2, at least the first electrode 411 and the light-emitting structure 412 can be conformally arranged with the planarization layer 2, i.e., the first electrode 411 and the light-emitting structure 412 have a concave-convex structure. Compared to a flat structure, the light-emitting area of ​​the light-emitting structure 412 is larger. Therefore, when the currents of the first electrode 411 and the second electrode 413 are the same, it is beneficial to improve the luminous intensity of the light-emitting unit 41.

[0043] The display panel provided in this application embodiment has a protrusion 21 in the planarization layer 2 within the pixel opening 32. The first electrode 411 and the light-emitting structure 412 of the light-emitting unit 41 within the pixel opening 21 are disposed in a conformal manner on the protrusion 21 of the planarization layer 2. Under the premise that the size of the pixel opening 32 is fixed, the protrusion 21 can increase the light-emitting area of ​​the light-emitting unit 41. Thus, without affecting the PPI of the display panel, the required display brightness can be achieved without increasing the current, reducing the heat generation of the display panel and improving the service life of the display panel.

[0044] like Figure 3A cross-sectional schematic diagram of another display panel provided in an embodiment of this application is shown.

[0045] In some embodiments, such as Figure 3 As shown, the protrusion 21 has a top surface 21a facing away from the substrate 1 and a bottom surface 21b facing the substrate 1. The size and position of the top surface 21a and the bottom surface 21b are not limited; the area of ​​the top surface 21a may be larger than the area of ​​the bottom surface 21b, the area of ​​the top surface 21a may be smaller than the area of ​​the bottom surface 21b, or the area of ​​the top surface 21a may be equal to the area of ​​the bottom surface 21b. Furthermore, the projections of the top surface 21a onto the substrate 1 and the bottom surface 21b onto the substrate 1 may completely overlap, partially overlap, or one may be located inside the other; there are no restrictions here.

[0046] In some optional embodiments, the orthographic projection of the top surface 21a onto the bottom surface 21b is located inside the bottom surface 21b, and the area of ​​the top surface 21a is smaller than the area of ​​the bottom surface 21b. That is, the area of ​​the top surface 21a is set to be smaller than the area of ​​the bottom surface 21b, and the orthographic projection of the top surface 21a onto the bottom surface 21b is located inside the bottom surface 21b. In this way, the connecting surface between the bottom surface 21b and the top surface 21a is set to face the side of the display surface, which is more conducive to the light emitted by the conformally arranged light-emitting unit 41 being emitted towards the display side.

[0047] The shape of the connecting surface can be flat or curved. The connecting surface can be recessed towards the substrate 1 or protruded outward towards the direction away from the substrate 1. There are no restrictions here.

[0048] Figures 5a to 7b The following are schematic diagrams of the structures of different protrusions 21 provided in the embodiments of this application and their cross-sectional views along the direction perpendicular to the substrate 1.

[0049] In some embodiments, the protrusion 21 further includes an inclined surface 21c connecting the top surface 21a and the bottom surface 21b. That is, the connecting surface is inclined, and the inclined surface 21c can be straight or curved, without limitation.

[0050] In some embodiments, such as Figure 5a and Figure 5b As shown, the inclined surface 21c is a plane. By setting the inclined surface 21c to a plane, the light emitted by the light-emitting unit 41 at the corresponding inclined surface 21c is emitted in a direction perpendicular to the inclined surface 21c. By reasonably setting the tilt angle of the inclined surface 21c, the light-emitting gaps between adjacent light-emitting units 41 can be filled, improving the display jaggedness problem. Furthermore, for display panels with severe color shift at specific viewing angles, the color shift problem of the display panel can be improved by setting the inclined surface 21c to have a corresponding tilt angle, without requiring a complex structure.

[0051] In other embodiments, such as Figures 6a to 7b As shown, the inclined surface 21c is an arc-shaped surface, meaning that the corresponding inclined surface 21c is part of a cone surface. Thus, the light-emitting unit 41 emits light in a direction perpendicular to the inclined surface 21c at its corresponding position on the inclined surface 21c. This means that the light-emitting unit 41 corresponding to the inclined surface 21c has more light-emitting directions, which can fill the light-emitting gaps between this light-emitting unit 41 and the multiple light-emitting units 41 distributed around it, further improving the display uniformity of the display panel.

[0052] The tilt angle of the inclined surface 21c relative to the bottom surface 21b can be specifically set according to the specific structure of the display panel. For example, it can be specifically set according to the position and spacing of the pixel arrangement to supplement the light emission gap of adjacent light emission units 41, thereby reducing the color deviation of the display panel.

[0053] In embodiments where the connecting surface is an inclined surface 21c, the shape of the corresponding protrusion 21 can be varied, such as cylindrical or polygonal. The number of protrusions 21 within a single pixel opening 32 can be one or more. The shapes of multiple protrusions 21 within a single pixel opening 32 can be the same or different. Similarly, the shapes of protrusions 21 within different pixel openings 32 can be the same or different, depending on the specific requirements, and are not limited here.

[0054] In some embodiments, such as Figures 5a to 6b As shown, the protrusion 21 is at least one of frustum or frustum pyramid shape.

[0055] Specifically, when the protrusion 21 is frustum-shaped, the corresponding inclined surface 21c is an arc-shaped surface; when the protrusion 21 is frustum-shaped, the corresponding inclined surface 21c is a plane. When the protrusion 21 is frustum-shaped, the light-emitting structure 412 corresponding to the inclined surface 21c emits light at an angle perpendicular to the inclined surface 21c, and the light-emitting unit 41 corresponding to the inclined surface 21c emits light in various directions around the central axis of the frustum-shaped protrusion 21. When the protrusion 21 is frustum-shaped, the light-emitting angle of the light-emitting unit 41 corresponding to the inclined surface 21c is perpendicular to the inclined surface 21c, and the light-emitting unit 41 corresponding to the inclined surface 21c emits light in four directions.

[0056] In some embodiments, such as Figure 7a and Figure 7b As shown, the orthographic projection of the protrusion 21 onto the substrate 1 is annular. Specifically, the cross-section of the protrusion 21 along the direction perpendicular to the substrate 1 can be semi-circular, right-angled trapezoid, isosceles trapezoid, or other irregular shapes, without limitation.

[0057] It is understandable that the projection of the protrusion 21 onto the substrate 1 is annular. Inclined surfaces 21c can be provided on both the outer and inner annular surfaces of the protrusion 21. In this way, the light-emitting unit 41 corresponding to the protrusion 21 has more light-emitting directions and has a better effect of filling the light-emitting gap.

[0058] The height of the protrusion 21 is not limited, as long as it is located within the pixel opening 32 and a light-emitting unit 41 can be formed on the protrusion 21.

[0059] In some embodiments, the height h of the protrusion 21 satisfies: 1μm≤h≤2μm. For example, h can be 1μm, 1.2μm, 1.5μm, 1.8μm, or 2μm, etc.

[0060] This configuration can meet the requirement of increasing the light-emitting area of ​​the light-emitting unit 41 corresponding to the protrusion 21, while also ensuring the machinability of the protrusion 21, reducing the phenomenon of insufficient light-emitting area of ​​the corresponding light-emitting unit 41 due to the protrusion 21 being too low, and reducing the probability of the protrusion 21 being too high and difficult to process.

[0061] In some embodiments, a plurality of protrusions 21 are located within the same pixel opening 32.

[0062] Specifically, the multiple protrusions 21 can be arranged regularly or irregularly within the pixel opening 32; no restriction is imposed here.

[0063] It is understandable that providing multiple protrusions 21 within a pixel opening 32 can further increase the light-emitting area of ​​the light-emitting unit 41. In embodiments where the protrusions 21 have inclined surfaces 21c, the light-emitting gap of the display panel can also be further reduced.

[0064] In some embodiments, a plurality of protrusions 21 are spaced apart within the same pixel opening 32.

[0065] Specifically, by reasonably setting the spacing of the protrusions 21 or the angle between the inclined surface 21c of the protrusions 21 and the bottom surface 21b, the light-emitting unit 41 can have a better effect of supplementing the light-emitting gap, so as to minimize the light-emitting gap corresponding to the area between adjacent pixel openings 32.

[0066] In an embodiment where the orthographic projection of the protrusion 21 on the substrate 1 is in the shape of a ring, the multiple protrusions 21 can be distributed in an array at intervals, or some or all of the protrusions 21 can be nested together, which is not limited here.

[0067] In some embodiments, the orthographic projection of the protrusion 21 onto the substrate 1 is annular, and multiple protrusions 21 are nested within the same pixel opening 32. It is understood that by setting multiple protrusions 21 to nest within each other, more inclined surfaces 21c facing outwards can be formed within the same size pixel opening 32, and the spacing of the inclined surfaces 21c can be controlled by controlling the distance between the protrusions 21 to better fill the light-emitting gap between adjacent light-emitting units 41.

[0068] In some embodiments, the angle between the inclined surface 21c and the bottom surface 21b is a first inclination angle θ1, and the value of the first inclination angle θ1 is 15°≤θ1≤45°. In this case, the inclined surface 21c is a straight surface. Specifically, the first inclination angle θ1 can be 15°, 20°, 30°, 40°, or 45°, etc. Setting 15°≤θ1≤45° can ensure the light-emitting area of ​​the light-emitting unit 41, so that the light-emitting intensity of the corresponding light-emitting unit 41 meets the relevant requirements of the display panel without increasing the current intensity. At the same time, it can reduce the problem of increasing the processing difficulty of the protrusion 21 due to the first inclination angle θ1 being too large.

[0069] In other embodiments, the angle between the tangent of the inclined surface 21c and the bottom surface 21b is a second inclination angle θ2, where the value of the second inclination angle θ2 is 15°≤θ2≤45°. In this case, the inclined surface 21c is an arc-shaped surface, that is, the inclined surface 21c is part of a cone surface. Specifically, the second inclination angle θ2 can be 15°, 20°, 30°, 40°, or 45°, etc. Setting 15°≤θ2≤45° can ensure the light-emitting area of ​​the light-emitting unit 41, so that the light-emitting intensity of the corresponding light-emitting unit 41 meets the relevant requirements of the display panel without increasing the current intensity. At the same time, it can reduce the problem of increasing the processing difficulty of the protrusion 21 due to an excessively large second inclination angle θ2.

[0070] By setting the protrusion 21 to have an inclined surface 21c, the light emission gap between two adjacent light emission units 41 can be filled. Depending on the different relationships between the tilt angle of the inclined surface 21c and the distance between the two adjacent light emission units 41, as well as the different number of protrusions 21 set in a pixel opening 32 and the different gaps between adjacent protrusions 21, the effect of the light emission unit 41 corresponding to the inclined surface 21c in filling the light emission gap is also different. The relevant structure can be reasonably set according to the specific display requirements to achieve the required supplementary light effect.

[0071] In some embodiments, the light-emitting unit 41 forms a display sub-region, the area of ​​which is larger than the area of ​​the corresponding pixel opening 32, and the spacing between at least two adjacent light-emitting regions is zero.

[0072] Specifically, the display sub-area can be the light-emitting area corresponding to the light-emitting unit 41 on the display surface of the display panel. Setting the distance between two adjacent display sub-areas to zero can further reduce the light-emitting gap of the display panel. Since two adjacent light-emitting units 41 are blocked by the isolation part 31, there is a certain distance between two adjacent light-emitting units 41. In order to satisfy the condition that the distance between the display sub-areas corresponding to two adjacent light-emitting units 41 is zero, at least one of the two adjacent light-emitting units 41 must have a display sub-area corresponding to a light-emitting unit 41 that covers the area between the two light-emitting units 41.

[0073] Therefore, in order to achieve zero spacing between two adjacent display sub-areas, the area of ​​the display sub-area corresponding to the light-emitting unit 41 can be changed, or the area of ​​the isolation part 31 between the two light-emitting units 41 can be changed, or a combination of both can be used.

[0074] For example, increasing the area of ​​the display sub-area corresponding to the light-emitting unit 41 can be achieved by changing the first tilt angle θ1 or the second tilt angle θ2 of the protrusion 21, or by changing the number and spacing of the protrusions 21 within a pixel opening 32. Changing the area of ​​the spacing between the light-emitting units 41 can be achieved by changing the pixel arrangement. Therefore, the light-emitting units 41 of different colors can be regular or irregular. Based on the value corresponding to the first or second tilt angle, combined with the number of protrusions 21 within a single pixel opening 32 and the spacing between adjacent protrusions 21, and further combined with the spacing between adjacent light-emitting units 41, it is possible to achieve zero spacing between any two adjacent display sub-areas. This can further and effectively reduce the problem of uneven display on the display panel.

[0075] In some embodiments, the light-emitting unit 41 includes a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit that emit different colors. The pixel opening 32 includes a first opening for accommodating the first light-emitting unit, a second opening for accommodating the second light-emitting unit, and a third opening for accommodating the third light-emitting unit. The first light-emitting unit forms a first display sub-region, and the orthographic projection of the first opening on the substrate 1 lies within the orthographic projection of the first display sub-region on the substrate 1. The second light-emitting unit forms a second display sub-region, and the orthographic projection of the second opening on the substrate 1 lies within the orthographic projection of the second display sub-region on the substrate 1. The third light-emitting unit forms a third display sub-region, and the orthographic projection of the third opening on the substrate 1 lies within the orthographic projection of the third display sub-region on the substrate 1. With this configuration, the protrusions 21 within the first, second, and third openings are all formed with inclined surfaces 21c. Correspondingly, the first, second, and third light-emitting units all have the effect of supplementing the light-emitting gaps. Thus, the light-emitting gaps of the entire display panel can be supplemented, further improving the display uniformity of the display panel.

[0076] In some embodiments, the first tilt angle θ1 or the second tilt angle θ2 of the protrusion 21 in the first opening, the second opening, and the third opening are not equal.

[0077] It is understandable that the inclined surface 21c of the protrusion 21 within each pixel opening 32 may be a straight surface, an arc surface, or both. The corresponding pixel opening 32 has a first inclined angle θ1, a second inclined angle θ2, or both. The specific values ​​of the first inclined angle θ1 and the second inclined angle θ2 reflect the emission angle of the light-emitting unit 41. Therefore, setting the first inclined angle θ1 and / or the second inclined angle θ2 of the protrusion 21 within the first, second, and third openings to be unequal can mean that the first inclined angle θ1 is unequal within different pixel openings 32, the second inclined angle θ2 is unequal, or both are unequal.

[0078] At different viewing angles, the rate of decay of light of different colors is different. By setting the first tilt angle θ1 and / or the second tilt angle θ2 of the protrusions 21 in the first opening, the second opening and the third opening to be unequal, the corresponding values ​​of the first tilt angle θ1 or the second tilt angle θ2 can be set according to the viewing angle where the light of different colors decays faster, so as to supplement the intensity of the light of the corresponding color at the corresponding viewing angle. This can reduce the color shift of the display panel at the corresponding viewing angle.

[0079] In some embodiments, the spacing between any adjacent first and second display sub-areas, or between the first and third display sub-areas, or between the second and third display sub-areas is zero.

[0080] Specifically, by reasonably setting the distance between two adjacent pixel openings 32, the appropriate value of the tilt angle of the corresponding protrusion 21 in the pixel opening 32, and the spacing of the protrusions 21 in each pixel opening 32, the light-emitting unit 41 corresponding to the protrusion 21 provides supplementary light to the part between two adjacent pixel openings 32. In this way, it is possible to achieve zero spacing between any two adjacent parts in the first display sub-area, the second display sub-area, and the third display sub-area. This can further improve the display uniformity of the display panel and reduce the color shift of the display panel.

[0081] It is understandable that the specific light-emitting colors of the first, second, and third light-emitting units are not limited, as long as the three units can emit different colors of light and the different colors of light can be combined to obtain various colors of light.

[0082] It is understandable that different colors of light attenuate at different rates from different viewing angles, resulting in color shift at the corresponding viewing angles. The color shift problem can be solved by adjusting the tilt angle of the protrusion 21, the spacing between adjacent pixel openings 32, or by adjusting the density of the protrusions 21 within a pixel opening 32. Specifically, for light-emitting units 41 with different emitting colors, the number of protrusions 21 per unit area within the corresponding pixel opening 32 can be set to be different.

[0083] In some embodiments, the first light-emitting unit emits red light, the second light-emitting unit emits blue light, and the third light-emitting unit emits green light. The number of protrusions 21 per unit area within the first opening is s1, the number of protrusions 21 per unit area within the second opening is s2, and the number of protrusions 21 per unit area within the third opening is s3.

[0084] Understandably, the attenuation rates of the three colors of light differ from different viewing angles. At some viewing angles, red light attenuates faster than green and blue light. Therefore, more protrusions 21 need to be set within the pixel opening 32 corresponding to red light compared to those corresponding to blue and green light to compensate for the intensity of red light. In this case, s1 must be greater than s2 and s3. At other viewing angles, red light attenuates slower than blue and green light. Therefore, fewer protrusions 21 need to be set within the pixel opening 32 corresponding to red light compared to those corresponding to blue and green light to meet the corresponding light intensity requirements. In this case, s1 must be less than s2 and s3. Of course, at other viewing angles, s1, s2, and s3 may need to satisfy other relationships, and their selection should be based on the attenuation rates of each color of light at viewing angles with severe color distortion.

[0085] In some embodiments, the number of protrusions 21 per unit area in the first opening (s1), the number of protrusions 21 per unit area in the second opening (s2), and the number of protrusions 21 per unit area in the third opening (s3) satisfy the relationship: s1 < s2 < s3.

[0086] At viewing angles between 20° and 40°, red light decays the slowest, followed by blue light, and green light decays the fastest. Therefore, to address the color shift issue at these corresponding viewing angles, the protrusions 21 within the pixel opening 32 corresponding to red light should be sparser, the protrusions 21 within the pixel opening 32 corresponding to blue light can be relatively denser, and the protrusions 21 within the pixel opening 32 corresponding to green light should be the densest, meaning that s1 < s2 < s3 must be satisfied.

[0087] Understandably, while satisfying s1 < s2 < s3, the specific ratios of the attenuation rates of red, blue, and green light can be set according to the specific ratios of the attenuation rates of red, blue, and green light under the perspective of correcting color shift as needed. There are no restrictions here.

[0088] In addition, embodiments of this application also provide a display device, including any of the display panels described above. This display device may include, but is not limited to, mobile phones, tablet computers, wearable devices, etc.

[0089] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that, include: substrate; A planarization layer is disposed on one side of the substrate; A pixel definition layer is disposed on the side of the planarization layer opposite to the substrate, and the pixel definition layer includes an isolation portion and a pixel opening formed by the isolation portion; The planarization layer has a protrusion on its surface facing the pixel definition layer, and the protrusion is located inside the pixel opening. The display panel further includes a light-emitting layer, which comprises a plurality of light-emitting units located within the pixel opening and covering the protrusion; The light-emitting unit includes a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit that emit different colors; the pixel opening includes a first opening for accommodating the first light-emitting unit, a second opening for accommodating the second light-emitting unit, and a third opening for accommodating the third light-emitting unit; The first light-emitting unit emits red light, the second light-emitting unit emits blue light, and the third light-emitting unit emits green light; the number of protrusions per unit area within the first opening is s1, the number of protrusions per unit area within the second opening is s2, and the number of protrusions per unit area within the third opening is s3, where s1 < s2 < s3, in order to improve the color shift of the display panel at a viewing angle of 20° to 40°.

2. The display panel according to claim 1, characterized in that, The protrusion has a top surface facing away from the substrate and a bottom surface facing the substrate. The orthographic projection of the top surface onto the bottom surface is located inside the bottom surface, and the area of ​​the top surface is smaller than the area of ​​the bottom surface.

3. The display panel according to claim 2, characterized in that, The protrusion further includes an inclined surface connecting the top surface and the bottom surface, wherein the inclined surface is either a plane or an arc-shaped surface.

4. The display panel according to claim 3, characterized in that, The angle between the inclined surface and the bottom surface is the first inclination angle θ1, and the value of the first inclination angle θ1 is 15°≤θ1≤45°; Alternatively, the angle between the tangent of the inclined surface and the bottom surface is a second inclination angle θ2, where the value of the second inclination angle θ2 is 15°≤θ2≤45°.

5. The display panel according to claim 2, characterized in that, The light-emitting unit forms a display sub-region, the area of ​​which is larger than the area of ​​the corresponding pixel opening, and the spacing between at least two adjacent display sub-regions is zero.

6. The display panel according to claim 4, characterized in that, The first light-emitting unit forms a first display sub-area, and the orthographic projection of the first opening on the substrate is located within the orthographic projection of the first display sub-area on the substrate; The second light-emitting unit forms a second display sub-area, and the orthographic projection of the second opening on the substrate is located within the orthographic projection of the second display sub-area on the substrate; The third light-emitting unit forms a third display sub-region, and the orthographic projection of the third opening on the substrate lies within the orthographic projection of the third display sub-region on the substrate. The first tilt angle θ1 or the second tilt angle θ2 of the protrusions in the first opening, the second opening and the third opening are not equal, and / or the number of protrusions in the first opening, the second opening and the third opening is not equal.

7. The display panel according to claim 6, characterized in that, The spacing between any two adjacent first and second display sub-areas, or between the first and third display sub-areas, or between the second and third display sub-areas, is zero.

8. The display panel according to claim 1, characterized in that, The protrusion is at least one of the shapes of a frustum or a pyramid. Alternatively, the orthographic projection of the protrusion onto the substrate is ring-shaped.

9. The display panel according to claim 1, characterized in that, The height h of the protrusion satisfies: 1μm≤h≤2μm.

10. The display panel according to claim 1, characterized in that, Multiple protrusions are located within the same pixel opening.

11. The display panel according to claim 10, characterized in that, Multiple protrusions are spaced apart within the same pixel opening, or the orthogonal projection of the protrusions on the substrate is annular, and multiple protrusions are nested within the same pixel opening.

12. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 11.

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