Display panel and display device

Abstract

Provided are a display panel and a display device. The display panel comprises a display area, which comprises a central display area and a peripheral display area, the peripheral display area surrounding the central display area. The display panel comprises: a base substrate; and a plurality of pixel units located on the base substrate. At least one of the pixel units comprises a first color sub-pixel and a second color sub-pixel, wherein at least one first color sub-pixel comprises a first light-emitting element, and the first light-emitting element has a first pixel opening; and at least one second color sub-pixel comprises a second light-emitting element, and the second light-emitting element has a second pixel opening. The area of the orthographic projection, on the base substrate, of the first pixel opening of the first light-emitting element located in the central display area is greater than the area of the orthographic projection, on the base substrate, of the first pixel opening of the first light-emitting element located in the peripheral display area.

Description

Display panel and display device TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, and in particular, to a display panel and a display device. BACKGROUND

[0002] With the development of augmented reality and virtual reality technologies, a silicon-based OLED (Organic Light-Emitting Diode) display panel has become an ideal choice for a head-mounted display device due to its advantages of high pixel density, high contrast, low power consumption, and fast response speed. However, the silicon-based OLED is prone to color deviation of the chief ray angle (CRA) at a large viewing angle due to inconsistent attenuation of RGB in the light source at a large viewing angle. Therefore, how to improve the color deviation of the silicon-based OLED at a large viewing angle is an important research topic for researchers in the field.

[0003] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those skilled in the art. SUMMARY

[0004] In one aspect, a display panel is provided, wherein the display panel comprises a display area, the display area comprising a center display region and a peripheral display region, the peripheral display region surrounding the center display region, wherein the display panel comprises:

[0005] a substrate substrate; and

[0006] a plurality of pixel units on the substrate substrate, at least one of the pixel units comprising a first color sub-pixel and a second color sub-pixel, wherein at least one of the first color sub-pixels comprises a first light-emitting element having a first pixel opening; at least one of the second color sub-pixels comprises a second light-emitting element having a second pixel opening,

[0007] wherein an area of a normal projection on the substrate substrate of the first pixel opening of the first light-emitting element located in the center display region is greater than an area of a normal projection on the substrate substrate of the first pixel opening of the first light-emitting element located in the peripheral display region.

[0008] According to some exemplary embodiments, an area of a normal projection on the substrate substrate of the second pixel opening of the second light-emitting element located in the center display region is substantially equal to an area of a normal projection on the substrate substrate of the second pixel opening of the second light-emitting element located in the peripheral display region.

[0009] According to some exemplary embodiments, in at least one of the pixel units of the central display area, an area of a normal projection of the first pixel opening of the first light emitting element on the substrate is substantially equal to an area of a normal projection of the second pixel opening of the second light emitting element on the substrate; and / or,

[0010] In at least one of the pixel units of the peripheral display area, an area of a normal projection of the first pixel opening of the first light emitting element on the substrate is smaller than an area of a normal projection of the second pixel opening of the second light emitting element on the substrate.

[0011] According to some exemplary embodiments, areas of normal projections of the first pixel openings of the first light emitting elements located in the peripheral display area on the substrate gradually decrease in a direction away from the central display area.

[0012] According to some exemplary embodiments, the peripheral display area comprises an intermediate display area and an edge display area, the intermediate display area surrounds the central display area, the edge display area surrounds the intermediate display area,

[0013] An area of a normal projection of the first pixel opening of the first light emitting element located in the intermediate display area on the substrate is larger than an area of a normal projection of the first pixel opening of the first light emitting element located in the edge display area on the substrate; and

[0014] An area of a normal projection of the second pixel opening of the second light emitting element located in the intermediate display area on the substrate is substantially equal to an area of a normal projection of the second pixel opening of the second light emitting element located in the edge display area on the substrate.

[0015] According to some exemplary embodiments, at least one of the pixel units further comprises a third color sub-pixel, the third color sub-pixel comprises a third light emitting element, the third light emitting element has a third pixel opening;

[0016] Wherein, an area of a normal projection of the third pixel opening of the third light emitting element located in the central display area on the substrate is substantially equal to an area of a normal projection of the third pixel opening of the third light emitting element located in the peripheral display area on the substrate; and / or,

[0017] In at least one of the pixel units of the central display area, an area of a normal projection of the first pixel opening of the first light emitting element on the substrate is substantially equal to an area of a normal projection of the third pixel opening of the third light emitting element on the substrate.

[0018] According to some exemplary embodiments, at least one of the pixel units further comprises a third color sub-pixel, the third color sub-pixel comprising a third light emitting element, the third light emitting element having a third pixel opening;

[0019] wherein an area of a normal projection of the third pixel opening of the third light emitting element located in the central display area on the substrate is greater than an area of a normal projection of the third pixel opening of the third light emitting element located in the peripheral display area on the substrate; and / or,

[0020] In at least one of the pixel units in the central display area, an area of a normal projection of the first pixel opening of the first light emitting element on the substrate is substantially equal to an area of a normal projection of the third pixel opening of the third light emitting element on the substrate.

[0021] According to some exemplary embodiments, the display panel further comprises: a light emitting layer located on a side of the substrate; and a color filter layer located on a side of the light emitting layer away from the substrate, the color filter layer comprising a plurality of color filter films;

[0022] The plurality of color filter films comprises a first color filter film, a second color filter film and a third color filter film, the first color sub-pixel comprises the first color filter film, the second color sub-pixel comprises the second color filter film, and the third color sub-pixel comprises the third color filter film, wherein the first color filter film comprises one of a red filter film, a green filter film and a blue filter film, and the first color filter film, the second color filter film and the third color filter film are different in color; and

[0023] In the same pixel unit, a normal projection of the first light emitting element and the first color filter film on the substrate at least partially overlaps, a normal projection of the second light emitting element and the second color filter film on the substrate at least partially overlaps, and a normal projection of the third light emitting element and the third color filter film on the substrate at least partially overlaps.

[0024] According to some exemplary embodiments, in the central display area, a central axis of the first light emitting element substantially coincides with a central axis of the first color filter film; and / or,

[0025] In the central display area, a central axis of the second light emitting element substantially coincides with a central axis of the second color filter film; and / or,

[0026] In the central display area, a central axis of the third light emitting element substantially coincides with a central axis of the third color filter film; and / or,

[0027] a center axis of the first light emitting element located in the middle display area is offset from a center axis of the first color filter film by a first offset distance, a center axis of the first light emitting element located in the edge display area is offset from the center axis of the first color filter film by a second offset distance, and the first offset distance is less than the second offset distance; and / or,

[0028] a center axis of the second light emitting element located in the middle display area is offset from a center axis of the second color filter film by a third offset distance, a center axis of the second light emitting element located in the edge display area is offset from the center axis of the second color filter film by a fourth offset distance, and the third offset distance is less than the fourth offset distance; and / or,

[0029] a center axis of the third light emitting element located in the middle display area is offset from a center axis of the third color filter film by a fifth offset distance, a center axis of the third light emitting element located in the edge display area is offset from the center axis of the third color filter film by a sixth offset distance, and the fifth offset distance is less than the sixth offset distance.

[0030] According to some exemplary embodiments, the display panel further comprises: a plurality of lenses located on a side of the color filter layer away from the substrate, the plurality of lenses correspond one-to-one to the plurality of color filter films, a normal projection of the lens on the substrate and a normal projection of the corresponding color filter film on the substrate at least partially overlap, the plurality of lenses comprises a plurality of first lenses, a plurality of second lenses and a plurality of third lenses, and

[0031] In the central display area, a central axis of the first color filter film substantially coincides with a central axis of the first lens; and / or, in the central display area, a central axis of the second color filter film substantially coincides with a central axis of the second lens; and / or, in the central display area, a central axis of the third color filter film substantially coincides with a central axis of the third lens; and / or, a central axis of the first light emitting element located in the middle display area is offset from the central axis of the first lens by a seventh offset distance, a central axis of the first light emitting element located in the edge display area is offset from the central axis of the first lens by an eighth offset distance, the seventh offset distance is less than the eighth offset distance; and / or, a central axis of the second light emitting element located in the middle display area is offset from the central axis of the second lens by a ninth offset distance, a central axis of the second light emitting element located in the edge display area is offset from the central axis of the second lens by a tenth offset distance, the ninth offset distance is less than the tenth offset distance; and / or, a central axis of the third light emitting element located in the middle display area is offset from the central axis of the third lens by an eleventh offset distance, a central axis of the third light emitting element located in the edge display area is offset from the central axis of the third lens by a twelfth offset distance, the eleventh offset distance is less than the twelfth offset distance.

[0032] According to some example embodiments, the first offset distance and the seventh offset distance are not equal; and / or,

[0033] the second offset distance and the eighth offset distance are not equal; and / or,

[0034] the third offset distance and the ninth offset distance are not equal; and / or,

[0035] the fourth offset distance and the tenth offset distance are not equal; and / or,

[0036] the fifth offset distance and the eleventh offset distance are not equal; and / or,

[0037] the sixth offset distance and the twelfth offset distance are not equal.

[0038] According to some example embodiments, a central axis of the color filter film is located between a central axis of the corresponding light emitting element and a central axis of the corresponding lens.

[0039] According to some example embodiments, in the peripheral display area, a part of a normal projection of at least some adjacent color filter films on the substrate is overlapped.

[0040] According to some exemplary embodiments, the first color filter film has a first thickness, wherein the first thickness of the first color filter film located at the center display area is less than the first thickness of the first color filter film located at the peripheral display area.

[0041] According to some exemplary embodiments, in a direction from the center display area towards the edge display area, an area of a normal projection of the first pixel opening of the first light emitting element on the substrate is gradually reduced; and in the direction from the center display area towards the edge display area, the first thickness of the first color filter film is gradually increased.

[0042] In another aspect of the present disclosure, a display panel is provided, wherein the display panel comprises a display area, the display area comprising a center display area and a peripheral display area surrounding the center display area,

[0043] The display panel comprises:

[0044] a substrate; and a plurality of pixel units located on the substrate, at least one of the pixel units comprising a first color sub-pixel and a second color sub-pixel, wherein at least one of the first color sub-pixels comprises a first color filter film having a first thickness; and at least one of the second color sub-pixels comprises a second color filter film having a second thickness.

[0045] The first thickness of the first color filter film located at the center display area is less than the first thickness of the first color filter film located at the peripheral display area.

[0046] According to some exemplary embodiments, the second thickness of the second color filter film located at the center display area is substantially equal to the second thickness of the second color filter film located at the peripheral display area.

[0047] According to some exemplary embodiments, in at least one of the pixel units located at the center display area, the first thickness of the first color filter film is substantially equal to the second thickness of the second color filter film; and

[0048] In at least one of the pixel units located at the peripheral display area, the first thickness of the first color filter film is greater than the second thickness of the second color filter film.

[0049] According to some exemplary embodiments, the first thickness of the first color filter film located at the peripheral display area gradually increases in a direction away from the center display area.

[0050] According to some exemplary embodiments, the peripheral display area comprises a middle display area surrounding the central display area and an edge display area surrounding the middle display area,

[0051] wherein a first thickness of the first color filter film located in the middle display area is less than a first thickness of the first color filter film located in the edge display area; and

[0052] a second thickness of the second color filter film located in the middle display area is substantially equal to a second thickness of the second color filter film located in the edge display area.

[0053] According to some exemplary embodiments, at least one of the pixel units comprises a third color sub-pixel comprising a third color filter film having a third thickness;

[0054] wherein the third thickness of the third color filter film located in the central display area is substantially equal to the third thickness of the third color filter film located in the peripheral display area; and / or,

[0055] in at least one of the pixel units in the peripheral display area, the first thickness of the first color filter film is greater than the third thickness of the third color filter film.

[0056] In yet another aspect of the present disclosure, there is provided a display device, wherein the display device comprises the display panel according to any one of the preceding aspects. BRIEF DESCRIPTION OF DRAWINGS

[0057] The above and other objects, features and advantages of the present disclosure will become more apparent from the following description when taken in conjunction with the accompanying drawings, in which:

[0058] FIG. 1 is a plan view schematically showing a display panel according to an embodiment of the present disclosure;

[0059] FIG. 2 is a partial cross-sectional view schematically showing a display panel according to an exemplary embodiment of the present disclosure, taken along line BB’ in FIG. 1;

[0060] FIG. 3 is a graph showing luminance of light of different colors of a pixel unit in FIG. 2 as a function of viewing angle;

[0061] FIG. 4 is a partial cross-sectional view schematically showing a display panel according to an exemplary embodiment of the present disclosure, taken along line DD’ in FIG. 1;

[0062] FIG. 5 is a graph showing luminance of light of different colors of a display panel according to an exemplary embodiment of the present disclosure as a function of viewing angle;

[0063] FIG. 6 is a cross-sectional schematic view of a display panel in different regions according to an embodiment of the present disclosure;

[0064] FIG. 7 is a contrast schematic view of the relationship between luminance decay and viewing angle of a red sub-pixel in a peripheral display area of a display panel before and after a change in pixel opening according to an embodiment of the present disclosure;

[0065] FIG. 8 is a schematic view of the variation of red, green, and blue light with viewing angle in a peripheral display area of a display panel according to an embodiment of the present disclosure;

[0066] FIG. 9 is a cross-sectional schematic view of a display panel in different regions according to an embodiment of the present disclosure;

[0067] FIG. 10A is a cross-sectional schematic view of a display panel in different regions according to an embodiment of the present disclosure, FIG. 10B is a cross-sectional schematic view of a pixel unit in a central display area in FIG. 10A, FIG. 10C is a cross-sectional schematic view of a pixel unit in an intermediate display area in FIG. 10A, and FIG. 10D is a cross-sectional schematic view of a pixel unit in an edge display area in FIG. 10A;

[0068] FIG. 11A is a cross-sectional schematic view of a pixel unit of a display panel according to an embodiment of the present disclosure, FIG. 11B is a cross-sectional schematic view of a pixel unit of a central display area of a display panel according to an embodiment of the present disclosure, and FIG. 11C is a cross-sectional schematic view of a pixel unit of a peripheral display area of a display panel according to an embodiment of the present disclosure;

[0069] FIG. 12A is a cross-sectional schematic view of pixel units of different regions of a display panel according to an embodiment of the present disclosure, FIG. 12B is a cross-sectional schematic view of a pixel unit of a central display area in FIG. 12A, FIG. 12C is a cross-sectional schematic view of a pixel unit of an intermediate display area in FIG. 12A, and FIG. 12D is a cross-sectional schematic view of a pixel unit of an edge display area in FIG. 12A;

[0070] FIG. 13A is a cross-sectional schematic view of a pixel unit of an intermediate display area of a display panel according to an embodiment of the present disclosure, and FIG. 13B is a cross-sectional schematic view of a pixel unit of an edge display area of a display panel according to an embodiment of the present disclosure; and

[0071] FIG. 14 is a structural block diagram of a display device according to an embodiment of the present disclosure.

[0072] It should be noted that, for the sake of clarity, the size of a layer, structure, or region in the drawings for describing embodiments of the present application can be exaggerated or reduced, i.e., the drawings are not drawn to scale. DETAILED DESCRIPTION

[0073] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present disclosure with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only a part of embodiments of the present disclosure, rather than all the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present disclosure.

[0074] It should be noted that in the drawings, the size and relative size of the elements can be exaggerated for clarity and / or descriptive purposes. Thus, the size and relative size of the various elements in the drawings should not be construed as limiting. In the description and drawings, identical or similar reference numerals indicate identical or similar components.

[0075] Unless otherwise defined, technical terms or scientific terms used in the present disclosure should be understood as having the common meaning to a person of ordinary skill in the art. The terms "first", "second" and similar words used in the present disclosure do not indicate any order, number or importance, but are only used to distinguish different components. The terms "include" or "contain" and similar words mean that the components or objects before the words cover the components or objects listed after the words and their equivalents, and do not exclude other components or objects.

[0076] In this document, unless otherwise specified, directional terms such as "upper", "lower", "left", "right", "inner", "outer" and the like are used to indicate the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the present disclosure, and do not indicate or imply that the devices, elements or components referred to must have a particular orientation, be constructed or operated in a particular orientation. It should be understood that when the absolute position of the described object changes, the relative positional relationship they represent may also change accordingly. Therefore, these directional terms should not be understood as limiting the present disclosure.

[0077] In this document, directional expressions "first direction" and "second direction" are used to describe different directions of the display panel, for example, the row direction and the column direction of the display panel. It should be understood that such expressions are only exemplary descriptions, and are not limitations on the present disclosure.

[0078] In this document, the terms“substantially,”“approximately,”“near- ly,” and other similar terms are used as terms of approximation and not as terms of degree, and they are intended to account for the inherent deviations in a measurement or calculation that would be recognized by those of ordinary skill in the art. In view of the process fluctuations, measurement problems and errors associated with the measurement of a particular quantity (i.e., limitations of the measurement system), etc.,“approximately” or“nearby” as used herein includes the stated value and means within an acceptable range of deviation from the particular value determined by one of ordinary skill in the art. For example,“approximately” can mean within one or more standard deviations, or within ±10% or ±5% of the stated value.

[0079] Unless specifically stated otherwise, the relevant terms appearing in this document can be interpreted as follows.

[0080] Chief Ray Angle (CRA): refers to the maximum angle of light rays focused on a pixel.

[0081] Exemplarily, a silicon-based OLED display device usually takes a mono-silicon integrated circuit as a backplane and a top-emitting OLED device as a light source, and has the advantages of small volume, light weight, high contrast, fast response speed, and low power consumption, and is expected to become one of the next generation display terminals. Generally, a pixel unit of a silicon-based OLED display panel includes a light-emitting element, a color filter film, and a lens. The light-emitting element serves as a light source and emits light under current driving, the color filter film mainly plays a role of adjusting the light-out color and light-out intensity of the pixel unit, and the lens mainly plays a role of light collection and improving the brightness at a normal viewing angle.

[0082] The inventors have found through research that in a silicon-based OLED display panel, different wavelengths of light (such as RGB) have inconsistent decay rates at a large viewing angle, thereby causing a color cast problem at a large viewing angle. For example, at a large viewing angle, the decay rate of red light is lower than that of green light and blue light, which will cause the display color to be reddish at a large viewing angle, thereby reducing the display effect of the OLED display panel.

[0083] In an example embodiment of the present disclosure, a display panel is provided. Specifically, the display panel includes a display area including a central display region and a peripheral display region surrounding the central display region. The display panel includes: a substrate substrate; and a plurality of pixel units on the substrate substrate, at least one pixel unit including a first color sub-pixel and a second color sub-pixel, wherein at least one first color sub-pixel includes a first light emitting element having a first pixel opening; at least one second color sub-pixel includes a second light emitting element having a second pixel opening. Wherein the area of the orthographic projection of the first pixel opening of the first light emitting element located in the central display region on the substrate substrate is greater than the area of the orthographic projection of the first pixel opening of the first light emitting element located in the peripheral display region on the substrate substrate.

[0084] By differentiating the design of the pixel openings in the pixel units in different regions, the decay rate of the light of some colors at a large viewing angle can be accelerated, for example, the decay rate of red light at a large viewing angle can be accelerated, so that the principal angles of light of different colors at a large viewing angle are approximately equal, thereby reducing or eliminating color cast phenomenon.

[0085] FIG. 1 is a plan view of a display panel according to an embodiment of the present disclosure.

[0086] For example, the substrate substrate 1 can be a silicon-based substrate. The substrate substrate 1 includes a display area AA and a non-display area NA. The non-display area NA can surround the display area AA.

[0087] For example, the display substrate 100 can include a plurality of pixel units PX disposed on the substrate substrate 1. The plurality of pixel units PX are located in the display area AA and are used to display an image externally. For example, the plurality of pixel units PX are arranged in an array on the substrate substrate 1 along a first direction X and a second direction Y. The first direction X and the second direction Y intersect. The pixel units PX can include at least one first color sub-pixel sp1, at least one second color sub-pixel sp2, and at least one third color sub-pixel sp3. For example, the first color sub-pixel sp1 can be a red sub-pixel, the second color sub-pixel sp2 can be a green sub-pixel, and the third color sub-pixel can be a blue sub-pixel.

[0088] It should be noted that the pixel units PX can be arranged in a matrix form along rows extending in the first direction X and columns extending in the second direction Y. However, embodiments of the present disclosure do not specifically limit the arrangement form of the pixel units PX, and the pixel units PX can be arranged in various forms. For example, the pixel units PX can be arranged such that a direction inclined with respect to the first direction X and the second direction Y becomes a column direction, and a direction intersecting with the column direction becomes a row direction.

[0089] In embodiments of the present disclosure, the display region AA can have various shapes. For example, the display region AA can be arranged in various shapes such as a polygon (e.g., a rectangle) having a closed shape including straight sides, a circle including curved sides, an ellipse, and the like, and a semi-circle, a semi-ellipse, and the like including straight sides and curved sides. In embodiments of the present disclosure, the display region is arranged as one region having a quadrilateral shape including straight sides, the center of the display region AA can be a region where the intersection points of two diagonals of a right-angled quadrilateral are located, and the edges of the display region AA can be regions where the four sides of the right-angled quadrilateral are located. It should be understood that this is merely an example embodiment of the present disclosure, and is not a limitation of the present disclosure.

[0090] Illustratively, continuing to refer to FIG. 1, in some embodiments of the present disclosure, the display panel 100 can be used in a near-eye display device, for example, the display panel 100 can be used in a head-mounted display device. Since the display panel 100 is close to the distance between the eyes of the observer, the included angle (which can be referred to as the viewing angle) of the display region AA in the display panel 100 relative to the eyes of the observer will exhibit significant changes. As the viewing angle increases, the decay rates of different colors of sub-pixels are inconsistent, which can easily lead to color shift problems.

[0091] In order to more clearly describe embodiments of the present disclosure, in embodiments of the present disclosure, the display region AA is divided into a central display area M1 and a peripheral display area M2 according to the viewing angle range. The peripheral display area M2 surrounds the central display area M1. For example, the region in the display panel 100 located directly in front of the eyes of the observer has a small included angle relative to the eyes, for example, the display region within the -10° to 10° viewing angle range, which can be referred to as the central display area M1. The region in the display panel 100 located obliquely in front of the eyes of the observer has a large included angle relative to the eyes, for example, the display region within the -60° to -10° and 10° to 60° viewing angle ranges, which can be referred to as the peripheral display area M2.

[0092] In some embodiments, the peripheral display area M2 can also be divided into an intermediate display area M21 and an edge display area M22 according to different viewing angle ranges. The intermediate display area M21 surrounds the central display area M1, and the edge display area M22 surrounds the intermediate display area M21. For example, in some display panels, the display region within the -10° to 10° viewing angle range is referred to as the central display area M1, the display region within the -20° to -10° and 10° to 20° viewing angle ranges is referred to as the intermediate display area M21, and the display region within the -60° to -20° and 20° to 60° viewing angle ranges is referred to as the edge display area M22.

[0093] Exemplarily, the central display area of the display panel includes display regions within a view angle range of -θ1 to θ1, the intermediate display area of the display panel includes display regions within a view angle range of -θ2 to -θ1 and θ1 to θ2, and the edge display area of the display panel includes display regions within a view angle range of -θ3 to -θ2 and θ2 to θ3, where θ1 is less than θ2, θ2 is less than θ3, and θ1, θ2 and θ3 are all greater than 0°.

[0094] Exemplarily, the area division of the display panel can be divided according to the view angle range in combination with the color cast of different areas before the color cast improvement design is adopted. For example, the view angle range corresponding to the area without color cast or with unobvious color cast before the color cast improvement design is adopted is defined as the view angle range of the central display area M1. The view angle range corresponding to the area with obvious color cast is defined as the view angle range of the peripheral display area M2. Wherein, the area with the most serious color cast is usually located at the edge area of the display panel, and in the embodiments of the present disclosure, the peripheral display area M2 can be further divided into the intermediate display area M21 and the edge display area M22 according to the different degrees of color cast. Before the color cast improvement design is adopted, the color cast of the edge display area M22 is more serious than that of the intermediate display area M21.

[0095] It should be noted that due to the influence of multiple factors such as the shape, size and distance from the observer of the display panel, the view angle range of the central display area M1 and the peripheral display area M2 can also have other ranges. For example, in some display panels, the display region within a view angle range of -15° to 15° can be referred to as the central display area M1, and the range within -75° to -15° and 15° to 75° can be referred to as the peripheral display area M2. The embodiments of the present disclosure do not make specific limitations on the view angle range of the central display area M1 and the peripheral display area M2.

[0096] FIG. 2 is a partial cross-sectional schematic view of the display panel taken along line BB' in FIG. 1 according to an exemplary embodiment of the present disclosure, and FIG. 3 is a graph of the luminance of light of different colors of the pixel unit in FIG. 2 with respect to the view angle; FIG. 4 is a partial cross-sectional schematic view of the display panel taken along line DD' in FIG. 1 according to an exemplary embodiment of the present disclosure, and FIG. 5 is a graph of the luminance of light of different colors of the display panel with respect to the view angle.

[0097] Exemplarily, referring to FIG. 2, the display panel 100 can include a substrate 1, a light-emitting layer 2 located on one side of the substrate 1, a color film layer 3 located on the side of the light-emitting layer 2 away from the substrate 1, and a plurality of lenses 40 located on the side of the color film layer 3 away from the substrate 1. The light-emitting layer 2 can include a plurality of light-emitting elements 20, and the color film layer can include a plurality of color filters 30.

[0098] Exemplarily, the light emitting element 20 can comprise an OLED light emitting device. For example, the light emitting element 20 can comprise a white light OLED light emitting device; or, the light emitting element 20 can comprise a red light OLED light emitting device, a green light OLED light emitting device and a blue light OLED light emitting device; or, the light emitting element 20 can comprise a red light OLED light emitting device, a green light OLED light emitting device, a blue light OLED light emitting device and a white light OLED light emitting device.

[0099] Exemplarily, the display panel 100 can further comprise a plurality of other functional film layers, such as a first planarization layer G1, a second planarization layer G2, an optical protection layer G3, etc.

[0100] Exemplarily, the display panel 100 can further comprise a driving circuit layer between the substrate substrate 1 and the light emitting layer 2, for driving the light emitting element 20 to emit light.

[0101] Exemplarily, the display panel 100 can further comprise a pixel definition layer between the light emitting layer 2 and the substrate substrate 1, and the light emitting layer 2 can define a plurality of pixel openings through the pixel definition layer, and the pixel openings can be the areas where the light emitting elements emit light outward.

[0102] Exemplarily, in combination with reference to FIG. 1 and FIG. 2, the plurality of light emitting elements 20 can comprise a plurality of first light emitting elements 21, a plurality of second light emitting elements 22 and a plurality of third light emitting elements 23. The plurality of color filter films 30 can comprise a plurality of first color filter films 31, a plurality of second color filter films 32 and a plurality of third color filter films 33. The plurality of lenses 40 can comprise a plurality of first lenses 41, a plurality of second lenses 42 and a plurality of third lenses 43.

[0103] Exemplarily, the first light emitting element 21, the second light emitting element 22 and the third light emitting element 23 can all be white light emitting OLED light emitting elements. Alternatively, the color of the light emitted by the first light emitting element 21 is the same as the color of the first color filter film 31, the color of the light emitted by the second light emitting element 22 is the same as the color of the second color filter film 32, and the color of the light emitted by the third light emitting element 23 is the same as the color of the third color filter film 33.

[0104] Exemplarily, the first color filter film 31 comprises one of a red color filter film, a green color filter film and a blue color filter film. The color of the second color filter film 32 is different from the color of the first color filter film 31. The color of the third color filter film 33 is different from the colors of the first color filter film 31 and the second color filter film 32. For example, the first color filter film 31 is a red color filter film, the second color filter film 32 is a green color filter film, and the third color filter film 33 is a blue color filter film.

[0105] Exemplarily, at least part of the plurality of color filters 30 is arranged in one-to-one correspondence with at least part of the plurality of light emitting elements 20. Alternatively, the plurality of color filters 30 and the plurality of light emitting elements 20 are arranged in one-to-one correspondence.

[0106] Exemplarily, at least part of the plurality of lenses 40 is arranged in one-to-one correspondence with at least part of the plurality of light emitting elements 20. Alternatively, the plurality of lenses 40 and the plurality of light emitting elements 20 are arranged in one-to-one correspondence.

[0107] It should be noted that in the embodiments of the present disclosure, the display panel includes a plurality of pixel units PX, and each pixel unit PX includes a plurality of sub-pixels, for example, a first color sub-pixel sp1, a second color sub-pixel sp2, and a third color sub-pixel sp3. At least one sub-pixel can include one light emitting element 20, one color filter 30, and one lens 40. For the purpose of clear description, the light emitting element 20 and the color filter 30 included in the same sub-pixel are referred to as the light emitting element 20 and the color filter 30 arranged in correspondence. The light emitting element 20 and the lens 40 included in the same sub-pixel are referred to as the light emitting element 20 and the lens 40 arranged in correspondence. The color filter 30 and the lens 40 included in the same sub-pixel are referred to as the color filter 30 and the lens 40 arranged in correspondence. Based on this, the plurality of light emitting elements 20, the plurality of color filters 30, and the plurality of lenses 40 included in the plurality of sub-pixels are referred to as the plurality of color filters 30 and the plurality of light emitting elements 20 arranged in one-to-one correspondence, and the plurality of lenses 40 and the plurality of light emitting elements 20 arranged in one-to-one correspondence according to the sub-pixels to which they belong.

[0108] Exemplarily, in combination with reference to FIGS. 1 and 2, the plurality of pixel units PX includes a plurality of first color sub-pixels sp1. At least one first color sub-pixel sp1 includes one first light emitting element 21, one first color filter 31, and one first lens 41. Through the combined design of the first light emitting element 21, the first color filter 31, and the first lens 41, the first color sub-pixel sp1 can emit light of a first color, for example, red light, to the outside.

[0109] Exemplarily, the plurality of light emitting elements 20 can include a plurality of first light emitting elements 21, and the plurality of color filters 30 can include a plurality of first color filters 31. The plurality of first color filters 31 is arranged in one-to-one correspondence with the plurality of first light emitting elements 21, so that the plurality of first color sub-pixels sp1 emits light of a first color.

[0110] Exemplarily, the plurality of pixel units PX include a plurality of second color sub-pixels sp2. At least one second color sub-pixel sp2 includes one second light emitting element 22, one second color filter film 32, and one second lens 42. Through the combined design of the second light emitting element 22, the second color filter film 32, and the second lens 42, the second color sub-pixel sp2 can emit light of a second color, for example, green light, to the outside.

[0111] Exemplarily, the plurality of light emitting elements 20 can include a plurality of second light emitting elements 22, and the plurality of color filter films 30 can include a plurality of second color filter films 32. The plurality of second color filter films 32 are arranged one-to-one with the plurality of second light emitting elements 22, so that the plurality of second color sub-pixels sp2 emit light of a second color.

[0112] Exemplarily, the plurality of pixel units PX include a plurality of third color sub-pixels sp3. At least one third color sub-pixel sp3 includes one third light emitting element 23, one third color filter film 33, and one third lens 43. Through the combined design of the third light emitting element 23, the third color filter film 33, and the third lens 43, the third color sub-pixel sp3 can emit light of a third color, for example, blue light, to the outside.

[0113] Exemplarily, the plurality of light emitting elements 20 can include a plurality of third light emitting elements 23, and the plurality of color filter films 30 can include a plurality of third color filter films 33. The plurality of third color filter films 33 are arranged one-to-one with the plurality of third light emitting elements 23, so that the plurality of third color sub-pixels sp3 emit light of a third color.

[0114] In the related art, the light emitting elements in different regions in the display panel usually adopt a pixel opening design with substantially the same shape and size. That is, the area of the orthographic projection of the pixel opening of the light emitting element located in the central display area M1 on the substrate substrate and the area of the orthographic projection of the pixel opening of the light emitting element located in the peripheral display area M2 on the substrate substrate are substantially the same. For example, in combination with reference to FIGS. 2 and 4, the first light emitting element 21 has a first pixel opening a1, wherein the area of the orthographic projection of the first pixel opening a11 of the first light emitting element 21 located in the central display area M1 on the substrate substrate is substantially equal to the area of the orthographic projection of the first pixel opening a12 of the first light emitting element 21 located in the peripheral display area M2 on the substrate substrate. For another example, the second light emitting element has a second pixel opening b1, wherein the area of the orthographic projection of the second pixel opening b11 of the second light emitting element 22 located in the central display area M1 on the substrate substrate is substantially equal to the area of the orthographic projection of the second pixel opening b12 of the second light emitting element 22 located in the peripheral display area M2 on the substrate substrate. For another example, the third light emitting element has a third pixel opening c1, wherein the area of the orthographic projection of the third pixel opening c11 of the third light emitting element 23 located in the central display area M1 on the substrate substrate is substantially equal to the area of the orthographic projection of the third pixel opening c12 of the third light emitting element 23 located in the peripheral display area M2 on the substrate substrate.

[0115] It should be noted that in the embodiments of the present disclosure, “the area of the orthographic projection of the pixel opening of the light emitting element A on the substrate substrate is substantially equal to the area of the orthographic projection of the pixel opening of the light emitting element B on the substrate substrate” means that the ratio of the area of the orthographic projection of the pixel opening of the light emitting element A on the substrate substrate to the area of the orthographic projection of the pixel opening of the light emitting element B on the substrate substrate is within the range of 0.8-1.2. Taking the shape of the pixel opening as a square as an example, the larger the area of the orthographic projection of the pixel opening on the substrate substrate, the larger the side length, and under the condition that other factors are the same, the larger the light emitting area, the stronger the light emitting intensity, and the larger the proportion in the mixed light. In the embodiments of the present disclosure, the shape of the pixel opening can also include various shapes such as rectangle, circle, ellipse, etc. In the case of the same shape, the larger the size (or width) of the cross section of the pixel opening, the larger the area of the pixel opening on the substrate substrate.

[0116] Exemplarily, referring to FIG. 3, in the central display area M1, the decay speeds of different colors of light with the change of the viewing angle are substantially consistent. For example, in the viewing angle range of -10° to 10°, the luminance decay curves of RGB are substantially coincided, indicating that the luminance decay speeds of the RGB three colors of light in the viewing angle range of -10° to 10° are substantially the same, and thus there is substantially no color cast in the central display area M1.

[0117] In the central display area M1, in combination with reference to FIG. 2 and FIG. 3, the color filter film and / or the lens can be located directly above the pixel opening, and the light intensity of the pixel unit can be symmetric about the normal viewing angle (0° viewing angle). For example, the chief ray angle CRA of the central display area M1 is parallel to the 0° viewing angle. In some embodiments, in order to improve the display effect of the display panel, the chief ray angle CRA of some pixel units in the display panel needs to be designed and adjusted, for example, by offsetting the color filter film and / or the lens to adjust the chief ray angle CRA of the pixel unit. For example, in a micro display device, some display areas of the display panel (for example, the edge display area) are not located directly in front of the human eye, and in order to optimize the overall display effect of the display panel, the chief ray angle of the pixel unit in some areas of the display panel needs to be designed and adjusted.

[0118] For example, in combination with reference to FIG. 6-FIG. 8, in the peripheral display area M2, since the area where the pixel unit is located is not directly in front of the human eye, in order to adjust the display effect of the peripheral display area M2, the chief ray angle CRA of the pixel unit in the peripheral display area M2 needs to be offset to the side close to the human eye (for example, the side close to the central display area M1), so as to improve the display effect of the peripheral display area. In at least some areas of the peripheral display area, since the chief ray angle CRA of the pixel unit is offset to the left side, the chief ray angle CRA of the pixel unit (i.e., the angle corresponding to the direction with the maximum light intensity) is a negative angle. For example, as shown in FIG. 7 and FIG. 8, the chief ray angles of the red sub-pixel, the green sub-pixel and the blue sub-pixel can all be negative angles. In the peripheral display area M2, the light intensity of the pixel unit can be asymmetric about the normal viewing angle.

[0119] For example, with reference to FIG. 5, in some display areas of the display panel (for example, the peripheral display area), the decay rates of different colors of light with respect to the viewing angle are different. For example, in the viewing angle range of 60° to 80°, the decay rate of red light R is significantly lower than that of green light G and blue light B, resulting in a red-biased chief ray angle CRA of the pixel unit at a large viewing angle, which affects the display effect of the display panel.

[0120] In order to improve this large viewing angle color deviation problem, in an embodiment of the present disclosure, the display panel can be designed differently for pixel openings in different areas, so as to adjust the decay rate of some colors of light with respect to the viewing angle, so that the decay rates of RGB multiple colors of light with respect to the viewing angle are more consistent, thereby improving the large viewing angle color deviation problem.

[0121] FIG. 6 is a cross-sectional schematic view of a display panel in different regions according to an embodiment of the present disclosure, FIG. 7 is a contrast schematic view of the relationship between luminance decay and viewing angle of a red sub-pixel in a peripheral display area of a display panel before and after a change in pixel opening according to an embodiment of the present disclosure, and FIG. 8 is a schematic view of the variation of red light, green light, and blue light with viewing angle in a peripheral display area of a display panel according to an embodiment of the present disclosure.

[0122] Exemplarily, with reference to FIG. 6, in an embodiment of the present disclosure, the pixel openings of the partial sub-pixels of the pixel units in different regions can be designed differently. Taking a display panel that is red-biased at a large viewing angle as an example, where a first color sub-pixel sp1 emits red light R, a second color sub-pixel sp2 emits green light G, and a third color sub-pixel sp3 emits blue light B, an embodiment of the present disclosure can design the first pixel openings of the first light emitting elements 21 in different regions differently, so as to adjust the decay rate of red light with viewing angle, improve the consistency of RGB decay at a large viewing angle, and thus improve the problem of red bias at a large viewing angle.

[0123] Exemplarily, FIG. 6 shows a combined view of the cross-sectional schematic views of the three regions taken along the line BB', the line CC', and the line DD' in FIG. 1. Taking an example in which the multiple sub-pixels have the same shape, the larger the size (or width) of the pixel opening in the cross-sectional view in the sub-pixel, the larger the area of the orthogonal projection of the sub-pixel on the substrate.

[0124] With reference to FIG. 6, the area of the orthogonal projection of the first pixel opening a11 of the first light emitting element 21 located in the central display area M1 on the substrate is larger than the area of the orthogonal projection of the first pixel opening a12 of the first light emitting element 21 located in the peripheral display area M2 on the substrate. The area of the orthogonal projection of the second pixel opening b11 of the second light emitting element 22 located in the central display area M1 on the substrate is substantially equal to the area of the orthogonal projection of the second pixel opening b12 of the second light emitting element 22 located in the peripheral display area M2 on the substrate. The area of the orthogonal projection of the third pixel opening c11 of the third light emitting element 23 located in the central display area M1 on the substrate is substantially equal to the area of the orthogonal projection of the third pixel opening c12 of the third light emitting element 23 located in the peripheral display area M2 on the substrate. That is, the orthogonal projections of the pixel openings of the multiple second light emitting elements 22 in different regions on the substrate can have the same area, the orthogonal projections of the pixel openings of the multiple third light emitting elements 23 in different regions on the substrate can have the same area, and the orthogonal projections of the pixel openings of the multiple first light emitting elements 21 in different regions on the substrate can correspondingly decrease the area of the pixel openings as the viewing angle increases.

[0125] Through such a design, the attenuation speed of the red light R in the peripheral display area M2 can be accelerated at a large viewing angle, thereby improving the consistency of RGB attenuation at a large viewing angle and improving the problem of red bias at a large viewing angle.

[0126] Although the embodiments of the present disclosure show that the problem of red bias at a large viewing angle is improved by adjusting the area of the normal projection of the pixel opening of the red sub-pixel on the substrate, the embodiments of the present disclosure are not limited thereto. The embodiments of the present disclosure can also be applied to the case of green or blue bias at a large viewing angle. For example, the area of the pixel opening of the green sub-pixel can be adjusted to improve the green bias phenomenon. For another example, the area of the pixel opening of the blue sub-pixel can be adjusted to improve the blue bias phenomenon, which will not be described herein again.

[0127] In some embodiments, in at least one pixel unit PX of the central display area M1, the red, green and blue sub-pixels can adopt a substantially same area design in the pixel opening of the central display area.

[0128] Exemplarily, in combination with reference to FIG. 1 and FIG. 6, the display panel 100 can include a plurality of pixel units PX. The pixel unit PX can include at least one first light emitting element 21 and at least one second light emitting element 22.

[0129] In at least one pixel unit PX of the central display area M1, the area of the normal projection of the first pixel opening a11 of the first light emitting element 21 on the substrate can be substantially equal to the area of the normal projection of the second pixel opening b11 of the second light emitting element 22 on the substrate.

[0130] Exemplarily, the pixel unit PX can further include at least one third light emitting element 23. In at least one pixel unit PX of the central display area M1, the area of the normal projection of the first pixel opening a11 of the first light emitting element 21 on the substrate can be substantially equal to the area of the normal projection of the third pixel opening c11 of the third light emitting element 23 on the substrate.

[0131] Through such a design, the aperture ratio of the RGB sub-pixels in the central display area M1 can be improved as much as possible, and the brightness of the display panel can be improved.

[0132] Within the viewing angle range of the central display area M1, the attenuation speeds of the RGB light sources are substantially consistent, and by designing the areas of the pixel openings of the sub-pixels corresponding to the RGB three colors to be substantially equal, the proportion of the RGB three colors in the mixed light in the central display area M1 can not change significantly with the viewing angle, thereby improving the display effect of the display panel.

[0133] In some embodiments, in at least one pixel unit PX of the central display area M1, the area of the first pixel opening a11 of the first light emitting element 21 on the orthographic projection on the substrate, the area of the second pixel opening b11 of the second light emitting element 22 on the orthographic projection on the substrate, and the area of the third pixel opening c11 of the third light emitting element 23 on the orthographic projection on the substrate can also be partially unequal or all unequal. For example, the light emitting efficiency and the pixel opening area of the light emitting elements corresponding to the RGB three sub-pixels can be designed comprehensively so that the mixed light of the RGB three sub-pixels can form white light.

[0134] Exemplarily, in at least one pixel unit PX of the peripheral display area M2, the area of the first pixel opening a12 of the first light emitting element 21 on the orthographic projection on the substrate is smaller than the area of the second pixel opening b12 of the second light emitting element 22 on the orthographic projection on the substrate.

[0135] In the viewing angle range of the peripheral display area M2, the RGB light sources themselves have inconsistent decay rates. For example, in combination with reference to FIGS. 5 and 6, in the peripheral display area M2, the decay rate of the first color light (for example, red light) emitted by the first color sub-pixel sp1 corresponding to the first light emitting element 21 is lower than the decay rate of the second color light (for example, green light) emitted by the second color sub-pixel sp2 corresponding to the second light emitting element 22, thereby possibly causing red color cast at a large viewing angle. In order to improve the color cast problem caused by the inconsistent RGB decay at a large viewing angle, it is necessary to adjust the RGB decay rates in the effective viewing angle range of the display panel.

[0136] It should be noted that the "effective viewing angle" here refers to the viewing angle range in which the observer can obtain a clear display picture. In some embodiments, when the silicon-based OLED display panel is used for micro display, the effective viewing angle is small, for example, the effective viewing angle is in the range of -50° to 50°, or the effective viewing angle is in the range of -36° to 36°.

[0137] FIG. 7 shows a graph of the luminance decay of red sub-pixels with different pixel opening designs in the peripheral display area versus the viewing angle, and FIG. 8 is a graph of the luminance decay of green sub-pixels and blue sub-pixels added to FIG. 7 versus the viewing angle. Among them, the red sub-pixels include two pixel opening areas, which are denoted as a and b respectively, and a is greater than b. As can be known from FIG. 7, the smaller the pixel opening area of the red sub-pixel, the lower the red light luminance at the same viewing angle. That is, reducing the pixel opening area of the red sub-pixel can effectively adjust the large viewing angle decay rate of the red sub-pixel.

[0138] By reducing the area of the first pixel opening a12 of the first light emitting element 21 in the peripheral display area M2, the decay rate of the first color light (e.g., red light) emitted by the first color sub-pixel sp1 can be accelerated, so that the consistency of the decay of the first color light (e.g., red light) and the second color light (e.g., green light) is improved, which is beneficial to improve the large viewing angle color deviation phenomenon of the display panel.

[0139] Referring to FIG. 8, in a large viewing angle range (e.g., in a range of -60° to -20° or 20° to 40°), when the pixel opening area of the red sub-pixel is a, the decay rate of the red light is lower than that of the green light of the green sub-pixel, which is easy to cause red deviation. When the pixel opening area of the red sub-pixel is b, the decay rate of the red light is accelerated, so that the consistency of the decay of the red light and the green light is improved, which can improve the large viewing angle red deviation phenomenon.

[0140] In the peripheral display area M2, the degree of inconsistency of the decay of RGB three-color light will also change with the change of the viewing angle. For example, in some embodiments, the closer to the edge of the display area in the peripheral display area M2, the higher the degree of inconsistency of the decay of RGB three-color light, and the more serious the color deviation. In order to further improve the large viewing angle color deviation problem of the display panel, the pixel opening can be designed in a gradual manner according to the distance of the pixel from the display center, so that the adjustment effect of the pixel opening matches the decay of RGB three-color light in the corresponding area (or viewing angle range), and the large viewing angle color deviation problem of the display panel is better improved.

[0141] For example, continuing to refer to FIG. 6, the area of the normal projection of the first pixel opening of the plurality of first light emitting elements 21 in the peripheral display area M2 on the substrate substrate gradually decreases in the direction Z away from the central display area M1.

[0142] For example, the area of the normal projection of the first pixel opening a121 of the first light emitting element 21 in the middle display area M21 on the substrate substrate is greater than the area of the normal projection of the first pixel opening a122 of the first light emitting element 21 in the edge display area M22 on the substrate substrate. The area of the normal projection of the second pixel opening b121 of the second light emitting element 22 in the middle display area M21 on the substrate substrate is substantially equal to the area of the normal projection of the second pixel opening b122 of the second light emitting element 22 in the edge display area M22 on the substrate substrate.

[0143] For example, the area of the normal projection of the third pixel opening c121 of the third light emitting element 23 in the middle display area M21 on the substrate substrate is substantially equal to the area of the normal projection of the third pixel opening c122 of the third light emitting element 23 in the edge display area M22 on the substrate substrate.

[0144] By further reducing the first pixel opening of the first light emitting element 21 in the edge display area M22, the decay rate of the first color light (for example, red light) emitted by the first color sub-pixel sp1 corresponding to the first light emitting element 21 in the edge display area M22 can be accelerated to a greater extent, thereby further improving the RGB decay consistency and improving the large-angle color cast.

[0145] It should be noted that although the embodiments of the present disclosure show a design in which the area of the first pixel opening includes three different areas, the embodiments of the present disclosure are not limited thereto. In the embodiments of the present disclosure, the display area can be divided into more sub-areas, and the area of the pixel opening in each sub-area can be designed in combination with the specific color cast of the different sub-areas. For example, the farther away from the central area, the smaller the area of the pixel opening corresponding to the light of a certain color in the sub-area, so that the decay rate of the light of this color can be adjusted specifically, thereby improving the RGB decay consistency and improving the large-angle color cast.

[0146] In the embodiments of the present disclosure, in addition to adjusting the area of the pixel opening corresponding to the light of a certain color when the decay rate of the light of this color is slow, thereby improving the color cast, the areas of the pixel openings corresponding to the lights of two colors can also be adjusted simultaneously when the decay rates of the lights of these two colors are slow, thereby improving the RGB decay consistency and improving the color cast. For example, the decay rates of red light R and green light G are slower than the decay rate of blue light B, and the pixel openings of the red sub-pixels and the pixel openings of the green sub-pixels can be adjusted simultaneously, thereby improving the large-angle color cast. For another example, the decay rates of red light R and blue light B are slower than the decay rate of green light G, and the pixel openings of the red sub-pixels and the pixel openings of the blue sub-pixels can be adjusted simultaneously, thereby improving the large-angle color cast.

[0147] FIG. 9 is a cross-sectional schematic view of a display panel in different areas according to an embodiment of the present disclosure.

[0148] For example, in the embodiments of the present disclosure, with reference to FIG. 9, taking the display panel emitting red light R by the first color sub-pixel sp1, green light G by the second color sub-pixel sp2, and blue light B by the third color sub-pixel sp3, and the red light R and the blue light B being too strong at a large viewing angle as an example, the embodiments of the present disclosure can differentially design the first pixel opening of the first light emitting element 21 and the third pixel opening of the third light emitting element 23 in different areas, thereby adjusting the decay rate of the red light and the blue light with the change of the viewing angle, improving the RGB decay consistency at a large viewing angle, and thereby improving the problem of red cast at a large viewing angle.

[0149] Exemplarily, in at least one pixel unit PX of the central display area M1, the area of the first pixel opening a11 of the first light emitting element 21 in the orthographic projection on the substrate substrate, the area of the second pixel opening b11 of the second light emitting element 22 in the orthographic projection on the substrate substrate, and the area of the third pixel opening c11 of the third light emitting element 23 in the orthographic projection on the substrate substrate can be substantially equal, so that the RGB decay rate in the central display area M1 can be guaranteed to be substantially consistent.

[0150] The area of the first pixel opening a11 of the first light emitting element 21 in the orthographic projection on the substrate substrate in the central display area M1 is greater than the area of the first pixel opening a12 of the first light emitting element 21 in the orthographic projection on the substrate substrate in the peripheral display area M2. The area of the second pixel opening b11 of the second light emitting element 22 in the orthographic projection on the substrate substrate in the central display area M1 is substantially equal to the area of the second pixel opening b12 of the second light emitting element 22 in the orthographic projection on the substrate substrate in the peripheral display area M2. The area of the third pixel opening c11 of the third light emitting element 23 in the orthographic projection on the substrate substrate in the central display area M1 is greater than the area of the third pixel opening c12 of the third light emitting element 23 in the orthographic projection on the substrate substrate in the peripheral display area M2. That is, the area of the first pixel opening a12 of the first light emitting element 21 and the area of the third pixel opening c12 of the third light emitting element 23 can be reduced in the peripheral display area M2, so that the decay rates of red light and blue light are accelerated in the peripheral display area M2, thereby improving the RGB decay consistency at a large viewing angle and improving the problems of red and blue deviation at a large viewing angle.

[0151] Exemplarily, in at least one pixel unit PX of the peripheral display area M2, the area of the first pixel opening a12 of the first light emitting element 21 in the orthographic projection on the substrate substrate can be equal to or different from the area of the third pixel opening c12 of the third light emitting element 23 in the orthographic projection on the substrate substrate. That is, the degree of reduction of the area of the first pixel opening a12 of the first light emitting element 21 and the area of the third pixel opening c12 of the third light emitting element 23 can be designed according to the decay of red light and blue light, respectively, so as to improve the RGB decay consistency at a large viewing angle.

[0152] In the silicon-based OLED display panel, the main light angle CRA of the pixel unit changes accordingly with the change of the viewing angle. In the embodiment of the present disclosure, the main light angle of the pixel unit can be adjusted by offsetting the color filter film and the lens in part of the pixel units, thereby improving the display effect of the display panel.

[0153] FIG. 10A is a schematic cross-sectional view of a display panel in different regions according to an embodiment of the present disclosure, FIG. 10B is a schematic cross-sectional view of a pixel unit in a center display region in FIG. 10A, FIG. 10C is a schematic cross-sectional view of a pixel unit in an intermediate display region in FIG. 10A, and FIG. 10D is a schematic cross-sectional view of a pixel unit in an edge display region in FIG. 10A.

[0154] Exemplarily, in an embodiment of the present disclosure, in combination with reference to FIG. 2 and FIG. 10A, the plurality of light emitting elements 20 and the plurality of color filter films 30 are one-to-one corresponding, and the orthographic projection of the plurality of light emitting elements 20 on the substrate 1 at least partially overlaps with the orthographic projection of the corresponding color filter film 30 on the substrate 1. The plurality of lenses 40 and the plurality of color filter films 30 are one-to-one corresponding, and the orthographic projection of the lens 40 on the substrate at least partially overlaps with the orthographic projection of the corresponding color filter film 30 on the substrate.

[0155] Exemplarily, in combination with reference to FIG. 10A and FIG. 10B, in the center display region M1, the central axis of the light emitting element 20 substantially coincides with the central axis of the corresponding color filter film 30.

[0156] For example, in the center display region M1, the central axis L2011 of the first light emitting element 21 substantially coincides with the central axis L3011 of the corresponding first color filter film 31.

[0157] Exemplarily, in the center display region M1, the central axis L2012 of the second light emitting element 22 substantially coincides with the central axis L3012 of the corresponding second color filter film 32.

[0158] In the center display region M1, the central axis L2013 of the third light emitting element 23 substantially coincides with the central axis L3013 of the corresponding third color filter film 33.

[0159] Exemplarily, in the center display region M1, the central axis of the color filter film 30 substantially coincides with the central axis of the corresponding lens 40.

[0160] For example, in the center display region M1, the central axis L3011 of the first color filter film 31 substantially coincides with the central axis L4011 of the corresponding first lens 41.

[0161] Exemplarily, in the center display region M1, the central axis L3012 of the second color filter film 32 substantially coincides with the central axis L4012 of the corresponding second lens 42.

[0162] Exemplarily, in the central display area M1, the central axis L3013 of the third color filter film 33 substantially coincides with the central axis L4013 of the corresponding third lens 43. Exemplarily, in combination with reference to FIGS. 10C and 10D, the central axis L2021 of the first light emitting element 21 located in the middle display area M21 is offset from the central axis L3021 of the corresponding first color filter film 31 by a first offset distance D1. The central axis L2031 of the first light emitting element 21 located in the edge display area M22 is offset from the central axis L3031 of the corresponding first color filter film 31 by a second offset distance D2, and the first offset distance D1 is less than the second offset distance D2.

[0163] Exemplarily, the central axis L2022 of the second light emitting element 22 located in the middle display area M21 is offset from the central axis L3022 of the corresponding second color filter film 32 by a third offset distance D3. The central axis L2032 of the second light emitting element 22 located in the edge display area M22 is offset from the central axis L3032 of the corresponding second color filter film 32 by a fourth offset distance D4. The third offset distance D3 is less than the fourth offset distance D4.

[0164] Exemplarily, the central axis L2023 of the third light emitting element 23 located in the middle display area M21 is offset from the central axis L3023 of the corresponding third color filter film 33 by a fifth offset distance D5, and the central axis L2033 of the third light emitting element 23 located in the edge display area M22 is offset from the central axis L3033 of the corresponding third color filter film 33 by a sixth offset distance D6. The fifth offset distance D5 is less than the sixth offset distance D6.

[0165] Exemplarily, in at least part of the display area, the plurality of lenses 40 are arranged one-to-one corresponding to the plurality of light emitting elements 20.

[0166] Exemplarily, the central axis L2021 of the first light emitting element 21 located in the middle display area M21 is offset from the central axis L4021 of the corresponding first lens 41 by a seventh offset distance D7, and the central axis L2031 of the first light emitting element 21 located in the edge display area M22 is offset from the central axis L4031 of the corresponding first lens 41 by an eighth offset distance D8. The seventh offset distance D7 is less than the eighth offset distance D8.

[0167] Exemplarily, the central axis L2022 of the second light emitting element 22 located in the middle display area M21 is offset from the central axis L4022 of the corresponding second lens 42 by a ninth offset distance D9, and the central axis L2032 of the second light emitting element 22 located in the edge display area M22 is offset from the central axis L4032 of the corresponding second lens 42 by a tenth offset distance D10. The ninth offset distance D9 is less than the tenth offset distance D10.

[0168] Exemplarily, the center axis L2023 of the third light emitting element 23 located in the middle display area M21 is offset from the center axis L4023 of the corresponding third lens 43 by an eleventh offset distance D11, and the center axis L2033 of the third light emitting element 23 located in the edge display area M22 is offset from the center axis L4033 of the corresponding third lens 43 by a twelfth offset distance D12, and the eleventh offset distance D11 is smaller than the twelfth offset distance D12. By flexibly setting multiple parameters such as the offset distances (for example, the first offset distance D1 to the twelfth offset distance D12) of the lens and the color filter film in the pixel units located in different areas, the offset distance of the pixel unit far from the center of the display area can be smoothly increased, on the one hand, the angle of the chief ray angle CRA can be customized to ensure that the screen edge achieves a larger chief ray angle CRA, and on the other hand, the bright and dark circular rings caused by the offset distance of the lens can be avoided, thereby improving the display effect of the display substrate.

[0169] Exemplarily, the first offset distance D1 and the seventh offset distance D7 are not equal; and / or,

[0170] The second offset distance D2 and the eighth offset distance D8 are not equal; and / or,

[0171] The third offset distance D3 and the ninth offset distance D9 are not equal; and / or,

[0172] The fourth offset distance D4 and the tenth offset distance D10 are not equal; and / or,

[0173] The fifth offset distance D5 and the eleventh offset distance D11 are not equal; and / or,

[0174] The sixth offset distance D6 and the twelfth offset distance D12 are not equal.

[0175] In the same sub-pixel, the offset distance of the lens 40 relative to the light emitting element 20 can be different from the offset distance of the color filter film 30 relative to the light emitting element 20.

[0176] Exemplarily, in at least part of the pixel units of the display panel, the center axis of the color filter film 30 is located between the center axis of the corresponding light emitting element 20 and the center axis of the corresponding lens 40. That is, in the same sub-pixel, the color filter film 30 and the lens 40 are offset in the same direction relative to the corresponding light emitting element 20, and the offset distance of the lens is larger than that of the color filter film. For example, in the first color sub-pixel sp1 of the middle display area M21, the center axis L3021 of the first color filter film 31 is located between the center axis L2021 of the corresponding first light emitting element 21 and the center axis L4021 of the corresponding first lens 41.

[0177] By simultaneously designing the shift of the lens and the color filter film, the luminous intensity of the sub-pixel can be adjusted while realizing angle customization, which is conducive to improving display uniformity. Meanwhile, in the peripheral display area M2, the shift design of the color filter film 30 and the lens 40 can be combined with the gradient design of the pixel opening to realize angle customization and improve the consistency of RGB attenuation and the display effect of the display panel.

[0178] It should be noted that in the embodiments of the present disclosure, the "central axis" is a virtual straight line that divides an object into two symmetrical parts. Alternatively, the "central axis" is a virtual straight line that passes through the center point of the object and is perpendicular to the plane on which the object is located. In a three-dimensional space, the "central axis" is a central symmetry plane or a central symmetry axis. For example, the central axis of the color filter film can be a virtual straight line that passes through the center point of the color filter film and is perpendicular to the plane on which the color filter film is located. In some embodiments of the present disclosure, the color filter film, the light emitting element, and the lens are arranged in a light emitting direction, and the central axis of the color filter film can be parallel to the light emitting direction.

[0179] It should also be noted that in the embodiments of the present disclosure, the area of the light emitting element in the sub-pixel opening area that emits light outward is the display area of the sub-pixel for displaying images. The central axis of the light emitting element refers to the central axis of the pixel opening area of the light emitting element. In some embodiments, the light emitting element can also include some auxiliary parts located in the area outside the pixel opening area, which do not emit light outward due to being blocked by other light shielding components (such as a pixel definition layer).

[0180] In some embodiments, for different sub-pixels in the same pixel unit, the shift distances of the color filter film and the lens can be the same or different. For example, in the same pixel unit PX of the peripheral display area M2, the first shift distance D1 in the first color sub-pixel sp1 and the third shift distance D3 in the second color sub-pixel sp2 can be the same or different. For another example, the seventh shift distance D7 in the first color sub-pixel sp1 and the ninth shift distance D9 in the second color sub-pixel sp2 can be the same or different.

[0181] By flexibly designing the shift distances of the color filter film and the lens corresponding to different sub-pixels in the same pixel unit, the main light angles of different sub-pixels in the same pixel unit can be flexibly adjusted to realize more flexible angle customization.

[0182] Exemplarily, the offset distances of the lenses of at least part of the sub-pixels can be different, for example, the offset distance of the lenses of part of the sub-pixels in the middle display area M21 is different from the offset distance of the lenses of part of the sub-pixels in the edge display area M22. Since the offset distances of the lenses are different, the gaps between adjacent lenses can be inconsistent, thereby adversely affecting the uniformity of the display substrate.

[0183] In some embodiments of the present disclosure, in order to reduce the adverse effects caused by the inconsistent lens gaps, the color filter films corresponding to the sub-pixels of different colors can be adaptively offset and overlapped.

[0184] FIG. 11A is a schematic cross-sectional view of a pixel unit of a display panel according to an embodiment of the present disclosure, FIG. 11B is a schematic cross-sectional view of a pixel unit of a center display area of a display panel according to an embodiment of the present disclosure, and FIG. 11C is a schematic cross-sectional view of a pixel unit of an edge display area of a display panel according to an embodiment of the present disclosure.

[0185] Exemplarily, in the embodiments of the present disclosure, referring to FIG. 11A, in the edge display area M2, the orthographic projection of at least part of the adjacent color filter films 30 on the substrate is overlapped.

[0186] Through such a design, the luminance of different sub-pixels can be adjusted, and the display uniformity of the display substrate can be improved.

[0187] The overlapping widths between the color filter films corresponding to the sub-pixels of different colors can be different, and accordingly, the adjustment effects of the color filter films on the luminous intensity of the sub-pixels of different colors are also different. The overlapping widths of the color filter films of adjacent sub-pixels can be flexibly designed in combination with the luminous intensity of the light-emitting structure and the condensing effect of the lens, which is conducive to improving the uniformity of the display substrate.

[0188] In the embodiments of the present disclosure, in addition to adjusting the attenuation speed of the sub-pixels with the viewing angle by adjusting the area of the pixel opening, the attenuation speed of the sub-pixels with the viewing angle can also be adjusted by adjusting the transmittance of the color filter film. For example, the transmittance of the color filter film to light of a specific waveband can be reduced by increasing the thickness of the color filter film, thereby adjusting the attenuation speed of the sub-pixels with the viewing angle.

[0189] Exemplarily, in combination with FIGS. 11B and 11C, the area of the orthographic projection of the first pixel opening a11 of the first light-emitting element 21 located in the center display area M1 on the substrate is greater than the area of the orthographic projection of the first pixel opening a12 of the first light-emitting element 21 located in the edge display area M2 on the substrate.

[0190] The first color filter film 31 has a first thickness H1. The first thickness H11 of the first color filter film 31 located in the central display area M1 is less than the first thickness H12 of the first color filter film 31 located in the peripheral display area M2.

[0191] Through such a design, the size of the pixel opening and the thickness of the color filter film can be adjusted simultaneously, so as to change the attenuation speed of part of the sub-pixels at a large viewing angle, improve the RGB attenuation consistency, and improve the large viewing angle color deviation.

[0192] In some embodiments, in the direction from the central display area to the peripheral display area, the area of the orthographic projection of the first pixel opening of the first light emitting element on the substrate is gradually reduced; and in the direction from the central display area to the peripheral display area, the first thickness of the first color filter film is gradually increased. That is, the closer to the peripheral display area, the smaller the area of the orthographic projection of the first pixel opening of the first light emitting element 21 on the substrate, and the closer to the peripheral display area, the greater the first thickness of the first color filter film 31.

[0193] Through the design of simultaneously changing the size of the pixel opening and the thickness of the color filter film, the adjustment ability of the attenuation speed of the sub-pixel at a large viewing angle can be improved, and the RGB attenuation consistency can be better improved, and the large viewing angle color deviation can be improved.

[0194] In some embodiments, the pixel opening and the thickness of one or more different color sub-pixels can be adjusted simultaneously to improve the large viewing angle color deviation. For example, the first pixel opening of the first light emitting element, the first thickness of the first color filter film, the second pixel opening of the second light emitting element, and the second thickness of the second color filter film can be adjusted simultaneously to improve the large viewing angle color deviation.

[0195] In some embodiments, the attenuation speed of part of the sub-pixels at a large viewing angle can also be adjusted by the thickness of the color filter film alone, so as to improve the RGB attenuation consistency and improve the large viewing angle color deviation.

[0196] FIG. 12A is a schematic cross-sectional view of pixel units in different areas of a display panel according to an embodiment of the present disclosure, FIG. 12B is a schematic cross-sectional view of pixel units in a central display area in FIG. 12A, FIG. 12C is a schematic cross-sectional view of pixel units in an intermediate display area in FIG. 12A, and FIG. 12D is a schematic cross-sectional view of pixel units in a peripheral display area in FIG. 12A.

[0197] Exemplarily, in the embodiments of the present disclosure, in combination with reference to FIGS. 12A-12D, the thickness of the color filter film in the corresponding sub-pixel can be adjusted according to the different decay rates of the sub-pixels of different colors at a large viewing angle. For example, for the light of a color with a slow decay rate at a large viewing angle, the thickness of the color filter film corresponding to the color can be increased, so as to reduce the transmittance of the color filter film of the color, to adjust the decay rate of the light of the color, and to improve color deviation.

[0198] Continuing with the example that the display panel displays red light R by the first color sub-pixel sp1, green light G by the second color sub-pixel sp2, and blue light B by the third color sub-pixel sp3, and is red-biased at a large viewing angle, the embodiments of the present disclosure can differentially design the first thickness of the first color filter film 31 in different regions, so as to adjust the decay rate of the red light with the viewing angle, to improve the RGB decay consistency at a large viewing angle, and to improve the problem of red bias at a large viewing angle.

[0199] Exemplarily, the first color filter film 31 has a first thickness H1, the second color filter film 32 has a second thickness H2, and the third color filter film 33 has a third thickness H3.

[0200] Exemplarily, the first thickness H11 of the first color filter film 31 located in the central display area M1 is less than the first thickness H12 of the first color filter film 31 located in the peripheral display area M2.

[0201] Exemplarily, the second thickness H21 of the second color filter film 32 located in the central display area M1 is substantially equal to the second thickness H22 of the second color filter film 32 located in the peripheral display area M2.

[0202] Through such a design, the decay rate of the first color sub-pixel in the peripheral display area M2 can be accelerated, the RGB decay consistency can be improved, and color deviation can be improved.

[0203] Exemplarily, the display panel includes a plurality of pixel units PX, and each pixel unit PX includes at least one first color filter film 31 and at least one second color filter film 32.

[0204] In at least one pixel unit PX in the central display area M1, the first thickness H11 of the first color filter film 31 is substantially equal to the second thickness H21 of the second color filter film 32.

[0205] In at least one pixel unit PX in the peripheral display area M2, the first thickness H12 of the first color filter film 31 is greater than the second thickness H22 of the second color filter film 32.

[0206] The first thickness H12 of the first color filter film 31 is greater than the third thickness H32 of the third color filter film 33 in at least one pixel unit PX of the peripheral display area M2.

[0207] Through such a design, the attenuation speed of the first color light (for example, red light R) in the peripheral display area M2 can be accelerated at a large viewing angle, thereby improving the RGB attenuation consistency at a large viewing angle and improving the problem of red deviation at a large viewing angle.

[0208] It should be noted that in the embodiments of the present disclosure, "the thickness of A is substantially equal to the thickness of B" means that the ratio of the thicknesses of A and B is within the range of 0.8 to 1.2.

[0209] For example, the first thickness of the plurality of first color filter films 31 located in the peripheral display area M2 gradually increases in the direction Z away from the central display area M1.

[0210] For example, the peripheral display area M2 can include an intermediate display area M21 and an edge display area M22, the intermediate display area M21 surrounds the central display area M1, and the edge display area M22 surrounds the intermediate display area M21. The first thickness H11 of the first color filter film 31 located in the central display area M1 is less than the first thickness H121 of the first color filter film 31 located in the intermediate display area M21. The first thickness H121 of the first color filter film 31 located in the intermediate display area M21 is less than the first thickness H122 of the first color filter film 31 located in the edge display area M22.

[0211] For example, the second thickness H221 of the second color filter film 32 located in the intermediate display area M21 is equal to the second thickness H222 of the second color filter film 32 located in the edge display area M22.

[0212] For example, the third thickness H321 of the third color filter film 33 located in the intermediate display area M21 is equal to the third thickness H322 of the third color filter film 33 located in the edge display area M22.

[0213] Through such a design, the attenuation speed of the first color light of different regions can be adjusted, the RGB attenuation consistency at a large viewing angle is improved, and the color deviation of the display panel is improved.

[0214] For example, the second thickness H21 of the second color filter film 32 located in the central display area M1 is substantially equal to the second thickness H22 of the second color filter film 32 located in the peripheral display area M2.

[0215] For example, the third thickness H31 of the third color filter film 33 located in the central display area M1 is substantially equal to the third thickness H32 of the third color filter film 33 located in the peripheral display area M2.

[0216] Exemplarily, the second thickness H21 of the second color filter film 32 located in the central display area M1 is substantially equal to the third thickness H31 of the third color filter film 33 located in the central display area M1.

[0217] In some embodiments, H21, H22, H31 and H32 can be substantially equal. That is, in the case that the decay speed of one of the RGB three sub-pixels is slower at a large viewing angle, the thickness of the color filter film in the sub-pixel can be designed to be different, and the thickness of the color filter film in the other two color sub-pixels can be designed to be the same. Through such design, RGB decay consistency can be improved, and color deviation can be improved.

[0218] It should be noted that although the embodiments of the present disclosure show that the first thickness of the first color filter film includes a design of three different thicknesses, the embodiments of the present disclosure are not limited thereto. In the embodiments of the present disclosure, the display area can be divided into more sub-areas, and the thickness of the color filter film in each sub-area can be designed in combination with the specific color deviation of the sub-area. For example, the farther away from the central area, the greater the thickness of the color filter film corresponding to the light of a certain color, so that the decay speed of the light of the color can be adjusted, thereby improving RGB decay consistency and improving large viewing angle color deviation.

[0219] In the embodiments of the present disclosure, the thickness of the color filter film of two colors can also be designed to be different, so as to adjust the decay speed of the two color sub-pixels at a large viewing angle, improve RGB decay consistency, and improve color deviation.

[0220] In some embodiments, the thickness and offset distance of the filter can also be adjusted at the same time, so as to improve the decay consistency of pixels of various colors and improve color deviation.

[0221] FIG. 13A is a schematic cross-sectional view of a pixel unit of a middle display area of a display panel according to an embodiment of the present disclosure; and FIG. 13B is a schematic cross-sectional view of a pixel unit of an edge display area of a display panel according to an embodiment of the present disclosure.

[0222] Exemplarily, the first color filter film 31 has a first thickness, the second color filter film 32 has a second thickness, and the third color filter film 33 has a third thickness. The first thickness, the second thickness and the third thickness of different areas can be different or partially different.

[0223] Exemplarily, in some embodiments of the present disclosure, in combination with reference to FIGS. 13A and 13B, the central axis L2021 of the first light emitting element 21 located in the middle display area M21 is offset from the central axis L3021 of the first color filter film 31 by a first offset distance D1. The central axis L2031 of the first light emitting element 21 located in the edge display area M22 is offset from the central axis L3031 of the first color filter film 31 by a second offset distance D2. The first offset distance D1 is smaller than the second offset distance D2. The first thickness H121 of the first color filter film 31 located in the middle display area M21 is smaller than the first thickness H122 of the first color filter film 31 located in the edge display area M22.

[0224] Exemplarily, in combination with reference to FIGS. 13A and 13B, the central axis L2022 of the second light emitting element 22 located in the middle display area M21 is offset from the central axis L3022 of the second color filter film 32 by a third offset distance D3, and the central axis L2032 of the second light emitting element 22 located in the edge display area M22 is offset from the central axis L3032 of the second color filter film 32 by a fourth offset distance D4. The third offset distance D3 is smaller than the fourth offset distance D4. The second thickness H221 of the second color filter film 32 located in the middle display area M21 is substantially equal to the second thickness H222 of the second color filter film 32 located in the edge display area M22.

[0225] Exemplarily, in combination with reference to FIGS. 13A and 13B, the central axis L2023 of the third light emitting element 23 located in the middle display area M21 is offset from the central axis L3023 of the third color filter film 33 by a fifth offset distance D5, and the central axis L2033 of the third light emitting element 23 located in the edge display area M22 is offset from the central axis L3033 of the third color filter film 33 by a sixth offset distance D6. The fifth offset distance D5 is smaller than the sixth offset distance D6. The third thickness H321 of the third color filter film 33 located in the middle display area M21 is substantially equal to the third thickness H322 of the third color filter film 33 located in the edge display area M22.

[0226] Through such a design, the speed of the luminous intensity of different color pixels decaying with the viewing angle can be adjusted while adjusting the chief ray angle CRA of the pixel, which is beneficial to improve the color cast and improve the display effect.

[0227] FIG. 14 is a structural block diagram of a display device according to an embodiment of the present disclosure.

[0228] Optionally, embodiments of the present disclosure also provide a display device. Referring to FIG. 14, the display device 200 can include the display panel 100 described above. The display device 200 can include, but is not limited to, electronic paper, mobile phones, tablet computers, displays, notebook computers, digital photo frames, navigation devices, and any product or component having a display function. It should be understood that the display device has the same beneficial effects as the display panel provided by the foregoing embodiments.

[0229] While some embodiments of the present general inventive concept have been shown and described, it is to be understood that changes can be made in these embodiments, without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

Claims

1. A display panel comprising a display area, the display area comprising a central display region and a peripheral display region, the peripheral display region surrounding the central display region, characterized in that, The display panel comprises: a substrate substrate; and a plurality of pixel units on the substrate substrate, at least one of the pixel units comprising a first color sub-pixel and a second color sub-pixel, wherein at least one of the first color sub-pixels comprises a first light emitting element having a first pixel opening; at least one of the second color sub-pixels comprises a second light emitting element having a second pixel opening, wherein the area of the first pixel opening of the first light emitting element in the central display area on the normal projection of the substrate substrate is greater than the area of the first pixel opening of the first light emitting element in the peripheral display area on the normal projection of the substrate substrate.

2. The display panel of claim 1, wherein, The area of the second pixel opening of the second light emitting element in the central display area on the normal projection of the substrate substrate is substantially equal to the area of the second pixel opening of the second light emitting element in the peripheral display area on the normal projection of the substrate substrate.

3. The display panel of claim 1, wherein, In at least one of the pixel units in the central display area, the area of the first pixel opening of the first light emitting element on the normal projection of the substrate substrate is substantially equal to the area of the second pixel opening of the second light emitting element on the normal projection of the substrate substrate; and / or, In at least one of the pixel units in the peripheral display area, the area of the first pixel opening of the first light emitting element on the normal projection of the substrate substrate is less than the area of the second pixel opening of the second light emitting element on the normal projection of the substrate substrate.

4. The display panel of claim 1 or 2, wherein, The area of the first pixel opening of the first light emitting element in the peripheral display area on the normal projection of the substrate substrate gradually decreases in a direction away from the central display area.

5. The display panel of claim 1, wherein, The peripheral display area comprises an intermediate display area and an edge display area, the intermediate display area surrounding the central display area, the edge display area surrounding the intermediate display area, The area of the first pixel opening of the first light emitting element in the intermediate display area on the normal projection of the substrate substrate is greater than the area of the first pixel opening of the first light emitting element in the edge display area on the normal projection of the substrate substrate; and The area of the second pixel opening of the second light emitting element in the intermediate display area on the normal projection of the substrate substrate is substantially equal to the area of the second pixel opening of the second light emitting element in the edge display area on the normal projection of the substrate substrate.

6. The display panel of claim 5, wherein, At least one of the pixel units further comprises a third color sub-pixel, the third color sub-pixel comprising a third light emitting element having a third pixel opening; and wherein the area of the third pixel opening of the third light emitting element in the central display area on the normal projection of the substrate substrate is substantially equal to the area of the third pixel opening of the third light emitting element in the peripheral display area on the normal projection of the substrate substrate; and / or, In at least one of the pixel units in the central display area, an area of a normal projection of the first pixel opening of the first light emitting element on the substrate is substantially equal to an area of a normal projection of the third pixel opening of the third light emitting element on the substrate.

7. The display panel of claim 5, wherein, At least one of the pixel units further comprises a third color sub-pixel, the third color sub-pixel comprising a third light emitting element having a third pixel opening; wherein an area of a normal projection of the third pixel opening of the third light emitting element in the central display area on the substrate is greater than an area of a normal projection of the third pixel opening of the third light emitting element in the peripheral display area on the substrate; and / or, In at least one of the pixel units in the central display area, an area of a normal projection of the first pixel opening of the first light emitting element on the substrate is substantially equal to an area of a normal projection of the third pixel opening of the third light emitting element on the substrate.

8. The display panel of claim 6 or 7, wherein, The display panel further comprises a light emitting layer on one side of the substrate, and a color filter layer on a side of the light emitting layer away from the substrate, the color filter layer comprising a plurality of color filters; The plurality of color filters comprises a first color filter, a second color filter and a third color filter, the first color sub-pixel comprising the first color filter, the second color sub-pixel comprising the second color filter, and the third color sub-pixel comprising the third color filter, wherein the first color filter comprises one of a red filter, a green filter and a blue filter, the first color filter, the second color filter and the third color filter being different in color; and In the same pixel unit, a normal projection of the first light emitting element and the first color filter on the substrate at least partially overlaps, a normal projection of the second light emitting element and the second color filter on the substrate at least partially overlaps, and a normal projection of the third light emitting element and the third color filter on the substrate at least partially overlaps.

9. The display panel of claim 8, wherein, In the central display area, a central axis of the first light emitting element substantially coincides with a central axis of the first color filter; and / or, In the central display area, a central axis of the second light emitting element substantially coincides with a central axis of the second color filter; and / or, In the central display area, a central axis of the third light emitting element substantially coincides with a central axis of the third color filter; and / or, A central axis of the first light emitting element in the intermediate display area is offset from a central axis of the first color filter by a first offset distance, a central axis of the first light emitting element in the edge display area is offset from a central axis of the first color filter by a second offset distance, and the first offset distance is less than the second offset distance; and / or, a center axis of the second light emitting element located in the middle display area is offset from a center axis of the second color filter film by a third offset distance, and a center axis of the second light emitting element located in the edge display area is offset from a center axis of the second color filter film by a fourth offset distance, the third offset distance being less than the fourth offset distance; and / or, a center axis of the third light emitting element located in the middle display area is offset from a center axis of the third color filter film by a fifth offset distance, and a center axis of the third light emitting element located in the edge display area is offset from a center axis of the third color filter film by a sixth offset distance, the fifth offset distance being less than the sixth offset distance.

10. The display panel of claim 9, wherein, The display panel further includes: a plurality of lenses located on a side of the color film layer away from the substrate, the plurality of lenses corresponding one-to-one to the plurality of color filter films, a normal projection of the lens on the substrate and a normal projection of the corresponding color filter film on the substrate at least partially overlap, wherein the plurality of lenses includes a plurality of first lenses, a plurality of second lenses, and a plurality of third lenses, in the central display area, a center axis of the first color filter film substantially coincides with a center axis of the first lens; and / or, in the central display area, a center axis of the second color filter film substantially coincides with a center axis of the second lens; and / or, in the central display area, a center axis of the third color filter film substantially coincides with a center axis of the third lens; and / or, a center axis of the first light emitting element located in the middle display area is offset from a center axis of the first lens by a seventh offset distance, and a center axis of the first light emitting element located in the edge display area is offset from a center axis of the first lens by an eighth offset distance, the seventh offset distance being less than the eighth offset distance; and / or, a center axis of the second light emitting element located in the middle display area is offset from a center axis of the second lens by a ninth offset distance, and a center axis of the second light emitting element located in the edge display area is offset from a center axis of the second lens by a tenth offset distance, the ninth offset distance being less than the tenth offset distance; and / or, a center axis of the third light emitting element located in the middle display area is offset from a center axis of the third lens by an eleventh offset distance, and a center axis of the third light emitting element located in the edge display area is offset from a center axis of the third lens by a twelfth offset distance, the eleventh offset distance being less than the twelfth offset distance.

11. The display panel of claim 10, wherein, the first offset distance and the seventh offset distance are not equal; and / or, the second offset distance and the eighth offset distance are not equal; and / or, the third offset distance and the ninth offset distance are not equal; and / or, the fourth offset distance and the tenth offset distance are not equal; and / or, the fifth offset distance and the eleventh offset distance are not equal; and / or, the sixth offset distance and the twelfth offset distance are not equal.

12. The display panel of claim 11, wherein, A central axis of the color filter film is between a central axis of the corresponding light emitting element and a central axis of the corresponding lens.

13. The display panel according to any one of claims 9-12, wherein, In the peripheral display area, a part of the color filter film is overlapped with a part of the color filter film.

14. The display panel according to any one of claims 8-13, wherein, The first color filter film has a first thickness, the first thickness of the first color filter film in the central display area is less than the first thickness of the first color filter film in the peripheral display area.

15. The display panel according to any one of claims 8-13, wherein, In a direction from the central display area to the edge display area, an area of a projection of the first pixel opening of the first light emitting element on the substrate is gradually reduced; and In a direction from the central display area to the edge display area, the first thickness of the first color filter film is gradually increased.

16. A display panel comprising a display area, the display area comprising a central display region and a peripheral display region, the peripheral display region surrounding the central display region, characterised in that, The display panel comprises: a substrate; and a plurality of pixel units on the substrate, at least one of the pixel units comprising a first color sub-pixel and a second color sub-pixel, wherein at least one of the first color sub-pixels comprises a first color filter film having a first thickness, and at least one of the second color sub-pixels comprises a second color filter film having a second thickness, wherein the first thickness of the first color filter film in the central display area is less than the first thickness of the first color filter film in the peripheral display area.

17. The display panel of claim 16, wherein, The second thickness of the second color filter film in the central display area is substantially equal to the second thickness of the second color filter film in the peripheral display area.

18. The display panel of claim 16, wherein, In at least one of the pixel units in the central display area, the first thickness of the first color filter film is substantially equal to the second thickness of the second color filter film; and In at least one of the pixel units in the peripheral display area, the first thickness of the first color filter film is greater than the second thickness of the second color filter film.

19. The display panel of claim 18, wherein, The first thickness of the first color filter film in the peripheral display area gradually increases in a direction away from the central display area.

20. The display panel of claim 19, wherein, The peripheral display area comprises an intermediate display area and an edge display area, the intermediate display area surrounding the central display area, and the edge display area surrounding the intermediate display area; The first thickness of the first color filter film in the intermediate display area is less than the first thickness of the first color filter film in the edge display area; and The second thickness of the second color filter film in the intermediate display area is substantially equal to the second thickness of the second color filter film in the edge display area.

21. The display panel of any of claims 16-20, wherein, At least one of the pixel units comprises a third color sub-pixel, the third color sub-pixel comprising a third color filter film having a third thickness; and The third thickness of the third color filter film in the central display area is substantially equal to the third thickness of the third color filter film in the peripheral display area; and / or, in at least one of the pixel units in the peripheral display area, the first thickness of the first color filter film is greater than the third thickness of the third color filter film.

22. A display device comprising: A display panel comprising any of claims 1-21.

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