Display panel, method for manufacturing display panel, and display device

Abstract

The application discloses a display panel, a preparation method of the display panel and a display device. The display panel comprises a substrate, a first electrode layer, a pixel definition layer, a light-emitting functional layer and a second electrode layer. The pixel definition layer is arranged on the side of the first electrode layer away from the substrate. The light-emitting functional layer comprises a plurality of light-emitting units arranged at intervals. The first electrode layer is arranged on one side of the substrate and comprises a plurality of first electrodes arranged at intervals. The pixel openings and the first electrodes are arranged one by one. The second electrode layer is located on the side of the light-emitting functional layer away from the first electrode. At least part of the second electrode layer is located in the pixel opening. The surface of the first electrode away from the substrate is provided with a metasurface structure. The metasurface structure is configured to absorb light of a preset wavelength. Only the light of the preset wavelength band is absorbed, the active light-emitting wavelength can not be affected, and the light-emitting efficiency is improved. The antireflection requirement is met while the lightness and thinness of the display panel are met, and the performance of the display panel is improved.

Description

Technical Field

[0001] This application relates to the field of displays, specifically to a display panel, a method for manufacturing the display panel, and a display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) are self-emissive display devices. Compared to traditional liquid crystal displays (LCDs), OLED technology does not require a backlight and is self-emissive. OLEDs use a thin layer of organic material and a glass substrate; when current flows through, the organic material emits light. Therefore, OLED display panels can significantly save energy, be made lighter and thinner, withstand a wider range of temperature variations than LCD panels, and have a wider viewing angle. OLED display panels are expected to become the next-generation flat panel display technology after LCDs and are currently one of the most watched technologies in the flat panel display field. Summary of the Invention

[0003] This application provides a display panel, a method for manufacturing the display panel, and a display device, aiming to improve the performance of the display panel.

[0004] An embodiment of the first aspect of this application provides a display panel, comprising: a substrate; a first electrode layer disposed on one side of the substrate and including a plurality of first electrodes spaced apart; a pixel defining layer disposed on the side of the first electrode layer away from the substrate, the pixel defining layer including a pixel defining portion and a pixel opening formed by the pixel defining portion, the plurality of pixel openings being arranged in an array, the pixel openings and the first electrodes being disposed one-to-one; a light-emitting functional layer including a plurality of light-emitting units spaced apart, at least a portion of the light-emitting units being disposed within the pixel openings and located on the side of the first electrodes away from the substrate; and a second electrode layer located on the side of the light-emitting functional layer away from the first electrodes, at least a portion of the second electrode layer being located within the pixel openings. A metasurface structure is disposed on the surface of the first electrodes away from the substrate, the metasurface structure being configured to absorb light of a preset wavelength, the metasurface structure including a plurality of metasurface units disposed on the surface of the first electrodes away from the substrate, adjacent metasurface units being spaced apart to form grooves, at least a portion of the metasurface units and the grooves being located within the pixel openings.

[0005] According to an embodiment of the first aspect of this application, the metasurface structure includes metasurface units located on the side surface of the first electrode away from the substrate. There are multiple metasurface units, which are spaced apart and arranged in an array.

[0006] According to any of the foregoing embodiments of the first aspect of this application, the metasurface unit is integrally formed with the first electrode.

[0007] According to any of the foregoing embodiments of the first aspect of this application, the preset wavelength range is 490nm-505nm, and / or 585nm-600nm.

[0008] According to any of the foregoing embodiments of the first aspect of this application, the cross-section of the metasurface unit along the thickness direction of the display panel is at least one of a circle, an ellipse, a rectangle, and a triangle.

[0009] According to any of the foregoing embodiments of the first aspect of this application, the top wall of the metasurface unit on the side away from the substrate is recessed toward the substrate.

[0010] According to any of the foregoing embodiments of the first aspect of this application, the cross-section of the top wall along the thickness direction of the display panel is arc-shaped.

[0011] According to any of the foregoing embodiments of the first aspect of this application, the top wall is part of a sphere.

[0012] According to any of the foregoing embodiments of the first aspect of this application, the light-emitting unit includes a first type of unit and a second type of unit with different light-emitting colors. The height of the metasurface unit corresponding to the first type of unit along the thickness direction of the display panel is equal to the height of the metasurface unit corresponding to the second type of unit along the thickness direction of the display panel, and / or, the spacing between two adjacent metasurface units corresponding to the first type of unit is greater than or equal to the spacing between two adjacent metasurface units corresponding to the second type of unit.

[0013] According to any of the foregoing embodiments of the first aspect of this application, the light-emitting unit further includes a third type of unit, the light-emitting colors of the first type of unit, the second type of unit and the third type of unit are different from each other, the height of the metasurface unit corresponding to the second type of unit along the thickness direction of the display panel is equal to the height of the metasurface unit corresponding to the third type of unit along the thickness direction of the display panel, and / or, the spacing between two adjacent metasurface units corresponding to the second type of unit is greater than or equal to the spacing between two adjacent metasurface units corresponding to the third type of unit.

[0014] According to any of the foregoing embodiments of the first aspect of this application, the spacing between two adjacent metasurface units corresponding to the first type of unit is 280nm-500nm, and / or the spacing between two adjacent metasurface units corresponding to the second type of unit is 170nm-280nm.

[0015] According to any of the foregoing embodiments of the first aspect of this application, the spacing between two adjacent metasurface units corresponding to the third type of unit is 100nm-200nm.

[0016] According to any of the foregoing embodiments of the first aspect of this application, the height of the metasurface unit corresponding to the first type of unit along the thickness direction of the display panel is 50nm-200nm.

[0017] According to any of the foregoing embodiments of the first aspect of this application, the height of the metasurface unit corresponding to the second type of unit along the thickness direction of the display panel is 50nm-200nm.

[0018] According to any of the foregoing embodiments of the first aspect of this application, the height of the metasurface unit corresponding to the third type of unit along the thickness direction of the display panel is 50nm-200nm.

[0019] According to any of the foregoing embodiments of the first aspect of this application, the metasurface units corresponding to the first type of unit, the second type of unit, and / or the third type of unit have equal heights along the thickness direction of the display panel.

[0020] According to any of the foregoing embodiments of the first aspect of this application, the light emission color of the first type of unit is blue, and / or the light emission color of the second type of unit is green.

[0021] According to any of the foregoing embodiments of the first aspect of this application, the emission color of the third type of unit is red.

[0022] According to any of the foregoing embodiments of the first aspect of this application, at least a portion of the light-emitting functional layer extends from the side surface of the first electrode away from the substrate to the side surface of the metasurface unit away from the substrate.

[0023] According to any of the foregoing embodiments of the first aspect of this application, the surface of the light-emitting unit facing away from the first electrode has a flat structure.

[0024] According to any of the foregoing embodiments of the first aspect of this application, the second electrode layer further includes a connecting electrode, a plurality of second electrodes are disposed at intervals in the pixel opening, and the connecting electrode is connected between two adjacent second electrodes.

[0025] According to any of the foregoing embodiments of the first aspect of this application, the width of the connecting electrode is 2μm-6μm.

[0026] According to any of the foregoing embodiments of the first aspect of this application, the orthographic projection of the second electrode onto the substrate is located within the orthographic projection of the pixel opening onto the substrate.

[0027] According to any of the foregoing embodiments of the first aspect of this application, the second electrode and the connecting electrode are integrally formed.

[0028] According to any of the foregoing embodiments of the first aspect of this application, the method further includes: an insulating layer located on the side of the second electrode layer away from the substrate, the insulating layer including an insulating portion and a first opening formed by the insulating portion; a touch layer including a plurality of spaced-apart touch electrodes, the touch electrodes being correspondingly disposed within the first opening; and a light-absorbing layer located on the side of the touch layer away from the insulating layer, the light-absorbing layer including a plurality of light-absorbing portions located on the side of the touch electrodes away from the insulating layer, the light-absorbing portions being configured to absorb reflected light.

[0029] According to any of the foregoing embodiments of the first aspect of this application, the material of the insulating layer includes at least one of organic materials and light-selective materials.

[0030] According to any of the foregoing embodiments of the first aspect of this application, the light-selective material is configured to absorb light with a wavelength range of at least one of 490nm-505nm and 585nm-600nm.

[0031] According to any of the foregoing embodiments of the first aspect of this application, the touch electrode is disposed at an interval between the orthographic projection of the substrate and the pixel opening is disposed between the orthographic projection of the substrate.

[0032] According to any of the foregoing embodiments of the first aspect of this application, the touch electrode includes a first touch electrode and a second touch electrode disposed sequentially at intervals on the side away from the substrate.

[0033] According to any of the foregoing embodiments of the first aspect of this application, the material of the light-absorbing layer includes at least one of inorganic materials, metals, and metal compounds.

[0034] According to any of the foregoing embodiments of the first aspect of this application, the material of the light-absorbing layer includes at least one of silicon nitride and silicon oxide.

[0035] According to any of the foregoing embodiments of the first aspect of this application, the material of the pixel definition layer includes a light-shielding material.

[0036] According to any of the foregoing embodiments of the first aspect of this application, the material further includes: an encapsulation layer located on the side of the second electrode layer facing away from the substrate; and a light selection layer located on the side of the encapsulation layer facing away from the substrate, the light selection layer comprising a light selection material.

[0037] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes a touch layer, and the light selection layer is located between the encapsulation layer and the touch layer.

[0038] According to any of the foregoing embodiments of the first aspect of this application, the light-selective material is configured to absorb light with a wavelength range of at least one of 490nm-505nm and 585nm-600nm.

[0039] An embodiment of the second aspect of this application provides a method for fabricating a display panel, comprising: fabricating a first electrode layer on a substrate, the first electrode layer including a plurality of spaced-apart first electrodes; fabricating a metasurface structure on the side of the first electrodes facing away from the substrate, the metasurface structure being configured to absorb light of a preset wavelength; fabricating a pixel definition layer on the side of the first electrodes facing away from the substrate, the pixel definition layer including pixel defining portions and pixel openings formed by the pixel defining portions, a plurality of pixel openings being arrayed, and the pixel openings corresponding one-to-one with the first electrodes; and sequentially forming a light-emitting functional layer and a second electrode layer on the side of the pixel definition layer facing away from the substrate.

[0040] According to any of the foregoing embodiments of the second aspect of this application, the step of preparing a metasurface structure on the side of the first electrode away from the substrate, wherein the metasurface structure is configured to absorb light of a preset wavelength, further includes: performing electron etching on the first electrode to form metasurface units, wherein a plurality of metasurface units are spaced apart and arranged in an array.

[0041] According to any of the foregoing embodiments of the second aspect of this application, the step of sequentially forming a light-emitting functional layer and a second electrode layer on the side of the pixel definition layer away from the substrate further includes: patterning the second electrode material layer to obtain a second electrode, wherein a plurality of second electrodes are located at the pixel opening, and the second electrodes are located on the side of the light-emitting functional layer away from the substrate.

[0042] According to any of the foregoing embodiments of the second aspect of this application, the step of patterning a second electrode material layer to obtain a second electrode, wherein a plurality of second electrodes are located at pixel openings and the second electrodes are located on the side of the light-emitting functional layer away from the substrate further includes: patterning a second electrode material layer to obtain a connecting electrode, wherein the connecting electrode is connected between two adjacent second electrodes.

[0043] An embodiment of the third aspect of this application provides a display device, including a display panel as described above or a display panel prepared by a method comprising the display panel as described above.

[0044] In the display panel provided in this application embodiment, the display panel includes a substrate, a first electrode layer, a pixel definition layer, a light-emitting functional layer, and a second electrode layer. The pixel definition layer is disposed on the side of the first electrode layer away from the substrate, and includes a pixel defining portion and a pixel opening formed by the pixel defining portion. Multiple pixel openings are distributed in an array. The pixel defining portion is used to improve the crosstalk problem of different color sub-pixels. The light-emitting functional layer includes multiple light-emitting units spaced apart. At least a portion of the light-emitting units is correspondingly disposed within the pixel opening and located on the side of the first electrode away from the substrate. The at least portion of the light-emitting functional layer located within the pixel opening is used to realize the display function of the display panel.

[0045] A first electrode layer is disposed on one side of the substrate and includes multiple first electrodes spaced apart. A pixel opening and a first electrode are correspondingly arranged one-to-one. A second electrode layer is located on the side of the light-emitting functional layer opposite to the first electrodes, with at least a portion of the second electrode layer located within the pixel opening. The first and second electrodes are used to drive the light-emitting units to emit light of different colors. A metasurface structure is disposed on the surface of the first electrode opposite to the substrate. This metasurface structure is configured to absorb light of a preset wavelength, absorbing only the preset wavelength band, thus not affecting the OLED's active emission wavelength and improving light extraction efficiency. The metasurface structure includes metasurface units located on the surface of the first electrode opposite to the substrate. The metasurface structure partially overlaps with the OLED pixel opening area (light-emitting area) rather than completely covering the non-light-emitting area, reducing process steps and saving materials. Multiple metasurface units are spaced apart and arranged in an array. The metasurface absorbs ambient light through local resonance or waveguide mode, replacing the polarization filtering function of a circular polarizer and reducing screen reflectivity. Grooves form light traps, extending the optical path through multiple reflections / scatterings and improving ambient light absorption efficiency. The height of the metasurface units along the thickness direction of the display panel and / or the spacing between two adjacent metasurface units ranges from 10nm to 1000nm. Depending on the period and size, they absorb specific wavelengths of ambient light, reducing reflectivity. By designing the arrangement of the metasurface units, precise control of light is achieved. This reduces reflectivity while meeting the requirements for a thin and light display panel, thus improving the panel's performance. Attached Figure Description

[0046] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar features, and the drawings are not drawn to scale.

[0047] Figure 1 This is a top view schematic diagram of a display panel provided in an embodiment of this application;

[0048] Figure 2 This is one of the structural schematic diagrams of a display panel provided according to an embodiment of this application;

[0049] Figure 3 This is one of the structural schematic diagrams of a metasurface structure of a display panel according to an embodiment of this application;

[0050] Figure 4 This is a second schematic diagram of a metasurface structure of a display panel according to an embodiment of this application;

[0051] Figure 5 This is a third schematic diagram of a metasurface structure of a display panel according to an embodiment of this application;

[0052] Figure 6 This is a schematic diagram of the encapsulation layer of a display panel according to an embodiment of this application;

[0053] Figure 7 This is one of the flowcharts illustrating a method for manufacturing a display panel according to an embodiment of this application;

[0054] Figure 8 This is a second flowchart of a method for manufacturing a display panel according to an embodiment of this application;

[0055] Figure 9 This is the third flowchart of a method for manufacturing a display panel according to an embodiment of this application.

[0056] Explanation of reference numerals in the attached figures:

[0057] 10. Display panel;

[0058] 100, Substrate; 110, Substrate; 120, First insulating layer; 130, Second insulating layer; 140, Third insulating layer; 150, Driving circuit; 151, Transistor; 151a, Gate; 151b, Source / drain; 152, Storage capacitor; 152a, First electrode; 152b, Second electrode;

[0059] 200, Pixel definition layer; 210, Pixel limiting section; 220, Pixel opening;

[0060] 300. Metasurface structure; 310. Metasurface unit; 311. Top wall; 320. Groove;

[0061] 400, Light-emitting functional layer; 410, Light-emitting unit; 411, First type unit; 412, Second type unit; 413, Third type unit;

[0062] 500, First electrode layer; 501, First electrode; 510, Second electrode layer; 511, Second electrode; 512, Connecting electrode;

[0063] 600, Encapsulation layer; 610, First encapsulation layer; 620, Second encapsulation layer; 630, Third encapsulation layer;

[0064] 700, Insulating layer; 710, First opening; 720, Insulating part;

[0065] 800, Touch layer; 810, Touch electrode; 811, First touch electrode; 812, Second touch electrode;

[0066] 900, Light-absorbing layer; 910, Light-absorbing section; 920, Light-selective layer;

[0067] Z, the thickness direction of the display panel. Detailed Implementation

[0068] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0069] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0070] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0071] OLED (Organic Light Emitting Diode) is a self-emissive display technology with broad application prospects, especially in high-end consumer electronics such as smartphones, televisions, computers, tablets, and automotive displays. With continuous technological advancements, OLED technology is constantly iterating to improve brightness and reduce power consumption.

[0072] In existing technologies, the pixel emission area uses color filter materials to reflect specific wavelengths, while the non-pixel emission area uses light-blocking parts to absorb light. After passing through the color filter material, approximately 70% of the pixel emission is transmitted, which is better than the 43% transmission rate of traditional OLED screens with polarizers. However, this technology is complex, uses expensive materials, has low production efficiency, and is costly.

[0073] This application provides a display panel, which may be an organic light-emitting diode (OLED) display panel.

[0074] Figure 1 This is a top view schematic diagram of a display panel provided in an embodiment of this application; Figure 2 This is one of the structural schematic diagrams of a display panel provided according to an embodiment of this application; Figure 3 This is one of the structural schematic diagrams of a metasurface structure of a display panel according to an embodiment of this application;

[0075] like Figures 1 to 3 As shown in the embodiment of the first aspect of this application, the display panel 10 includes a substrate 100, a first electrode layer 500, a pixel definition layer 200, a light-emitting functional layer 400, and a second electrode layer 510. The first electrode layer 500 is disposed on one side of the substrate 100 and includes a plurality of first electrodes 501 spaced apart. The pixel definition layer 200 is disposed on the side of the first electrode layer 500 away from the substrate 100. The pixel definition layer 200 includes a pixel defining portion 210 and a pixel opening 220 formed by the pixel defining portion 210. The plurality of pixel openings 220 are arrayed, and the pixel openings 220 and the first electrodes 501 are correspondingly disposed one-to-one. The light-emitting functional layer 400 includes a plurality of light-emitting units 410 spaced apart. At least a portion of the light-emitting units 410 is correspondingly disposed within the pixel openings 220 and located on the side of the first electrodes 501 away from the substrate 100. The second electrode layer 510 is located on the side of the light-emitting functional layer 400 away from the first electrodes 501, and at least a portion of the second electrode layer 510 is located in the pixel openings 220. In this design, a metasurface structure 300 is provided on the surface of the first electrode 501 facing away from the substrate 100. The metasurface structure 300 is configured to absorb light of a preset wavelength. The metasurface structure 300 includes a plurality of metasurface units 310 disposed on the surface of the first electrode 501 facing away from the substrate 100. Adjacent metasurface units 310 are spaced apart to form a groove 320. At least a portion of the metasurface units 310 and the grooves 320 are located within the pixel opening 220, so that the metasurface structure 300 resonates with the light of the preset wavelength and thus absorbs the light.

[0076] In the display panel 10 provided in this embodiment, the display panel 10 includes a substrate 100, a first electrode layer 500, a pixel definition layer 200, a light-emitting functional layer 400, and a second electrode layer 510. The pixel definition layer 200 is disposed on the side of the first electrode layer 500 away from the substrate 100. The pixel definition layer 200 includes a pixel defining portion 210 and a pixel opening 220 formed by the pixel defining portion 210. A plurality of pixel openings 220 are arrayed. The pixel defining portion 210 is used to improve the crosstalk problem of different color sub-pixels. The light-emitting functional layer 400 includes a plurality of light-emitting units 410 disposed at intervals. At least a portion of the light-emitting units 410 is correspondingly disposed within the pixel opening 220 and located on the side of the first electrode 501 away from the substrate 100. The at least portion of the light-emitting functional layer 400 located within the pixel opening 220 is used to realize the display function of the display panel 10.

[0077] A first electrode layer 500 is disposed on one side of the substrate 100 and includes a plurality of first electrodes 501 spaced apart. Pixel openings 220 and first electrodes 501 are disposed in a one-to-one correspondence. A second electrode layer 510 is located on the side of the light-emitting functional layer 400 opposite to the first electrodes 501, and at least a portion of the second electrode layer 510 is located in the pixel openings 220. The first electrodes 501 and the second electrodes 511 are used to drive the light-emitting unit 410 to emit light of different colors.

[0078] Optionally, the substrate 100 can be configured in various ways. For example, the substrate 100 may include a substrate 110 and a driving circuit 150 disposed on the side of the substrate 110 facing the light-emitting functional layer 400. Exemplarily, the driving circuit 150 may include a transistor 151, a storage capacitor 152, and driving signal lines for connecting various devices. The transistor 151 may include a semiconductor, a gate 151a, and source / drain electrodes 151b. The storage capacitor 152 may include a first electrode 152a and a second electrode 152b.

[0079] Optionally, the substrate 100 may further include a first insulating layer 120, a second insulating layer 130 and a third insulating layer 140 disposed on one side of the substrate 110 and sequentially stacked in a direction away from the substrate 110.

[0080] Optionally, the display panel 10 further includes a first electrode 501 and a second electrode 511. The first electrode 501 is located on the side of the light-emitting functional layer 400 facing the substrate 100, and the second electrode 511 is located on the side of the light-emitting functional layer 400 away from the substrate 100. The first electrode 501 and the second electrode 511 are used to drive the light-emitting unit 410 to emit light. One of the first electrode 501 and the second electrode 511 is an anode, and the other is a cathode. In this embodiment, the first electrode 501 is used as the anode and the second electrode 511 is used as the cathode for illustrative purposes.

[0081] Optionally, the material of the first electrode 501 is generally a material with a high work function to improve hole injection efficiency. The first electrode 501 can be at least one of gold (Au), platinum (Pt), titanium (Ti), silver (Ag), indium tin oxide (ITO), zinc tin oxide (IZO), or a transparent conductive polymer (such as polyaniline). For example, the first electrode 501 can be made of ITO-Ag-ITO composite material, without any particular limitation.

[0082] Optionally, the material of the second electrode 511 can be at least one of the following metals: silver (Ag), aluminum (Al), lithium (Li), magnesium (Mg), ytterbium (Yb), calcium (Ca), or indium (In). The second electrode 511 can also be an alloy of the aforementioned metals, such as magnesium-silver alloy (Mg / Ag) or lithium-aluminum alloy (Li / Al). This embodiment does not impose any limitations on this.

[0083] Optionally, the light-emitting functional layer 400 includes at least one of an electron injection layer (EIL), an electron transport layer (ETL), a light-emitting material layer (EML), a hole injection layer (HIL), and a hole transport layer (HTL).

[0084] In this design, a metasurface structure 300 is provided on the side of the first electrode 501 facing away from the substrate 100. The metasurface structure 300 is configured to absorb light of a preset wavelength. By absorbing only the preset wavelength, it can avoid affecting the active emission wavelength of the OLED and improve light extraction efficiency. The metasurface structure 300 includes metasurface units 310, which are located on the side of the first electrode 501 facing away from the substrate 100. The metasurface structure 300 partially overlaps with the pixel opening 220 area, rather than completely covering the non-light-emitting area, which can reduce the process steps and save materials. Adjacent metasurface units 310 are spaced apart to form a groove 320. At least a portion of the metasurface units 310 and the grooves 320 are located within the pixel opening 220, so that the metasurface structure 300 resonates with the preset wavelength of light and absorbs it. The metasurface structure 300 absorbs ambient light through local resonance or waveguide mode, replacing the polarization filtering function of a circular polarizer and reducing screen reflectivity. The groove forms a light trap, which extends the light path through multiple reflections / scatterings, improves the efficiency of ambient light absorption, thereby reducing the reflectivity of the display panel 10 and improving the contrast.

[0085] Optionally, the display panel 10 provided in this embodiment can reduce its reflectivity and improve its contrast through the metasurface structure 300. This allows for the elimination of the polarizer, achieving both a thinner and lighter display panel 10 while improving its light extraction efficiency.

[0086] Optionally, there are multiple metasurface units 310, which are spaced apart and arranged in an array.

[0087] Optionally, the height of the metasurface unit 310 along the thickness direction z of the display panel 10 and / or the spacing between two adjacent metasurface units 310 ranges from 10nm to 1000nm.

[0088] Optionally, the thickness of the first electrode 501 is 10nm-15nm. For example, the thickness of the first electrode 501 can be 10nm, 12nm, 13nm, 14nm, or 15nm.

[0089] In some alternative embodiments, the metasurface unit 310 is integrally formed with the first electrode 501.

[0090] Optionally, the preset wavelength range is 490nm-505nm, and / or 585nm-600nm. For example, the preset wavelength range can be 490nm, 495nm, 500nm, 503nm, 505nm, and / or 585nm, 587nm, 590nm, 595nm, 597nm, 600nm. This allows for the absorption of more wavelengths of ambient light while reducing the absorption of wavelengths of working light.

[0091] Optional, such as Figure 2 and Figure 4 As shown, the cross-section of the metasurface unit 310 along the thickness direction Z of the display panel is at least one of a circle, an ellipse, a rectangle, and a triangle. The local electromagnetic field distribution can be controlled by different geometric shapes. Rectangular / triangular edges are prone to sharp-angle resonance, enhancing absorption at specific wavelengths, while the symmetry of circles / ellipses is suitable for wide-band modulation. Simpler shapes are easier to achieve using conventional photolithography, reducing costs.

[0092] Optional, such as Figure 2 and Figure 5 As shown, the top wall 311 of the metasurface unit 310 on the side away from the substrate 100 is recessed towards the substrate 100, which increases the light-gathering effect of the metasurface unit 310 and further improves the light extraction efficiency.

[0093] Optionally, the cross-section of the top wall 311 along the thickness direction of the display panel 10 is arc-shaped.

[0094] Optionally, the top wall 311 is part of a sphere.

[0095] In these alternative embodiments, such as Figure 2 and Figure 3 As shown, the metasurface unit 310 is integrally formed with the first electrode 501. The metasurface unit 310 is directly formed by etching or deposition through the first electrode 501, without the need for additional material deposition steps, thus reducing the number of masks and etching cycles.

[0096] In some optional embodiments, the light-emitting unit 410 includes a first type of unit 411 and a second type of unit 412 with different light-emitting colors. The height of the metasurface unit 310 corresponding to the first type of unit 411 along the thickness direction Z of the display panel is equal to the height of the metasurface unit 310 corresponding to the second type of unit 412 along the thickness direction Z of the display panel, and / or the spacing between two adjacent metasurface units 310 corresponding to the first type of unit 411 is greater than or equal to the spacing between two adjacent metasurface units 310 corresponding to the second type of unit 412.

[0097] Optionally, the light-emitting unit 410 further includes a third type of unit 413, wherein the light-emitting colors of the first type of unit 411, the second type of unit 412 and the third type of unit 413 are different from each other, the height of the metasurface unit 310 corresponding to the second type of unit 412 along the thickness direction Z of the display panel is equal to the height of the metasurface unit 310 corresponding to the third type of unit 413 along the thickness direction Z of the display panel, and / or, the spacing between two adjacent metasurface units 310 corresponding to the second type of unit 412 is greater than or equal to the spacing between two adjacent metasurface units 310 corresponding to the third type of unit 413.

[0098] Optionally, the spacing between two adjacent metasurface units 310 of the light-emitting unit 410 is the period of the metasurface structure 300.

[0099] Optionally, the spacing between two adjacent metasurface units 310 corresponding to the first type of unit 411 is 280nm-500nm, and / or the spacing between two adjacent metasurface units 310 corresponding to the second type of unit 412 is 170nm-280nm. For example, the spacing between two adjacent metasurface units 310 corresponding to the first type of unit 411 is 280nm, 350nm, 400nm, 450nm, or 500nm, and / or the spacing between two adjacent metasurface units 310 corresponding to the second type of unit 412 is 170nm, 220nm, 250nm, 270nm, or 280nm.

[0100] Optionally, the spacing between two adjacent metasurface units 310 corresponding to the third type unit 413 is 100nm-200nm. For example, the spacing between two adjacent metasurface units 310 corresponding to the third type unit 413 can be 100nm, 130nm, 150nm, 170nm, or 200nm.

[0101] Optionally, the height of the metasurface unit 310 corresponding to the first type of unit 411 along the thickness direction Z of the display panel is 50nm-200nm. For example, the height of the metasurface unit 310 corresponding to the first type of unit 411 along the thickness direction Z of the display panel can be 50nm, 70nm, 100nm, 150nm, or 200nm.

[0102] Optionally, the first type of unit 411 emits blue light, and / or the second type of unit 412 emits green light. Optionally, the third type of unit 413 emits red light. Since the wavelength of red light is greater than that of blue light, which is greater than that of green light, the period of the metasurface structure 300 corresponding to the first type of unit 411 is set to be greater than the period of the metasurface structure 300 corresponding to the second type of unit 412, and the period of the metasurface structure 300 corresponding to the second type of unit 412 is greater than the period of the metasurface structure 300 corresponding to the third type of unit 413. This allows the metasurface structure 300 corresponding to the light-emitting unit 410 of different colors to not absorb or reduce the absorption of light from that light-emitting unit 410, thereby improving the light emission efficiency while absorbing ambient light.

[0103] Optionally, the height of the metasurface unit 310 corresponding to the second type of unit 412 along the thickness direction Z of the display panel is 50nm-200nm. For example, the height of the metasurface unit 310 corresponding to the second type of unit 412 along the thickness direction Z of the display panel can be 50nm, 70nm, 100nm, 150nm, or 200nm.

[0104] Optionally, the height of the metasurface unit 310 corresponding to the third type of unit 413 along the thickness direction Z of the display panel is 50nm-200nm. For example, the height of the metasurface unit 310 corresponding to the third type of unit 413 along the thickness direction Z of the display panel can be 50nm, 70nm, 100nm, 150nm, or 200nm.

[0105] Optionally, the metasurface units 310 corresponding to the first type of unit 411, the second type of unit 412, and / or the third type of unit 413 have equal heights along the thickness direction Z of the display panel. This facilitates manufacturing and reduces process difficulty.

[0106] In these optional embodiments, the height of the metasurface unit 310 corresponding to the second type unit 412 along the thickness direction Z of the display panel is equal to the height of the metasurface unit 310 corresponding to the third type unit 413 along the thickness direction Z of the display panel, and / or, the spacing between two adjacent metasurface units 310 corresponding to the second type unit 412 is greater than or equal to the spacing between two adjacent metasurface units 310 corresponding to the third type unit 413.

[0107] In some alternative embodiments, at least a portion of the light-emitting functional layer 400 extends from the side surface of the first electrode 501 away from the substrate 100 to the side surface of the metasurface unit 310 away from the substrate 100.

[0108] Optionally, the surface of the light-emitting unit 410 facing away from the first electrode 501 has a flat structure.

[0109] In these optional embodiments, the spacing and thickness between the metasurface units 310 corresponding to different color light-emitting units 410 are positively correlated with the emission wavelength. By compensating for the differences in light emission efficiency of different colors through metasurface parameters, the performance of the display panel 10 is improved more precisely.

[0110] In some optional embodiments, the second electrode layer 510 further includes a connecting electrode 512, and a plurality of second electrodes 511 are spaced apart at the pixel opening 220, with the connecting electrode 512 connecting between two adjacent second electrodes 511.

[0111] Optionally, the width of the connecting electrode 512 is 2μm-6μm. For example, the width of the connecting electrode 512 can be 2μm, 3μm, 4μm, 5μm, or 6μm. This can reduce the possibility of the connecting electrode 512 breaking easily if the width is too small, and can also reduce the obstruction of light output by the connecting electrode 512 if the width is too large.

[0112] Optionally, the orthographic projection of the second electrode 511 onto the substrate 100 is located within the orthographic projection of the pixel opening 220 onto the substrate 100.

[0113] Optionally, the second electrode 511 and the connecting electrode 512 are integrally formed. The connecting electrode 512 is formed directly by etching or deposition through the second electrode 511, without the need for additional material deposition steps, thus reducing the number of masks and etching cycles.

[0114] In these optional embodiments, second electrodes 511 are spaced apart at pixel openings 220, and connecting electrodes 512 are connected between adjacent second electrodes 511. The second electrodes 511 are patterned, with the second electrodes 511 remaining above the sub-pixel opening 220 area. Outside the pixel opening, the second electrodes 511 are etched or not formed into a film. There are no second electrodes 511 between sub-pixels except for the connecting electrodes 512, to reduce the ambient light reflectivity between sub-pixels.

[0115] In some optional embodiments, the display panel 10 further includes an insulating layer 700, a touch layer 800, and a light-absorbing layer 900. The insulating layer 700 is located on the side of the second electrode layer 510 facing away from the substrate 100, and includes an insulating portion 720 and a first opening 710 formed by the insulating portions 720. The touch layer 800 includes a plurality of spaced-apart touch electrodes 810, which are correspondingly disposed within the first opening 710. The light-absorbing layer 900 is located on the side of the touch layer 800 facing away from the insulating layer 700, and includes a plurality of light-absorbing portions 910. The light-absorbing portions 910 are located on the side of the touch electrodes 810 facing away from the insulating layer 700 and are configured to absorb reflected light.

[0116] Optionally, the material of the insulating layer 700 includes at least one of organic materials and light-selective materials.

[0117] Optionally, the light-selective material is configured to absorb light with wavelengths in the range of 490nm-505nm and 585nm-600nm, and to reduce the red, green, and blue light emitted by the light-emitting unit 410.

[0118] Optionally, the touch electrode 810 is positioned at a distance from the orthographic projection of the substrate 100 to the orthographic projection of the pixel opening 220 on the substrate 100.

[0119] Optionally, the touch electrode 810 includes a first touch electrode 811 and a second touch electrode 812 arranged sequentially at intervals on the side away from the substrate 100.

[0120] Optionally, the material of the light-absorbing layer 900 includes at least one of inorganic materials, metals, and metal compounds.

[0121] Optionally, the material of the light-absorbing layer 900 includes at least one of silicon nitride and silicon oxide.

[0122] Optionally, the pixel definition layer 200 may be made of a light-shielding material to further reduce crosstalk between different color light-emitting units 410.

[0123] In these alternative embodiments, the ambient light reflected from the inorganic light-absorbing layer 900 and the ambient light reflected from the touch electrode 810 form destructive interference, reducing reflectivity. The insulating layer 700 can be a transparent organic material or a wavelength-selective absorbing material, further reducing ambient light reflectivity.

[0124] In some optional embodiments, the display panel 10 further includes an encapsulation layer 600 and a light selection layer 920. The encapsulation layer 600 is located on the side of the second electrode layer 510 away from the substrate 100, and the light selection layer 920 is located on the side of the encapsulation layer 600 away from the substrate 100. The light selection layer 920 includes a light selection material.

[0125] Optionally, the display panel 10 also includes a touch layer 800, with a light selection layer 920 located between the encapsulation layer 600 and the touch layer 800.

[0126] Optionally, the light-selective material is configured to absorb light with wavelengths in the range of 490nm-505nm and 585nm-600nm. For example, the light-selective material is configured to absorb light with wavelengths of 490nm, 493nm, 500nm, 503nm, 505nm, and / or 585nm, 587nm, 590nm, 595nm, 600nm. This absorbs ambient light while reducing the red, green, and blue light emitted by the light-emitting unit 410.

[0127] In these optional embodiments, the encapsulation layer 600 is located on the side of the light-emitting functional layer 400 facing away from the substrate 100. The encapsulation layer 600 is used to encapsulate the light-emitting functional layer 400, improve the problem of water and oxygen intrusion, and extend the service life of the display panel 10. The light selection layer 920 can selectively absorb ambient light outside the wavelength range of the light emitted by the light-emitting unit 410, further reducing the reflectivity of ambient light and improving the display effect of the display panel 10.

[0128] Optional, such as Figure 2 and Figure 6 As shown, the encapsulation layer 600 includes a first encapsulation layer 610 on the side opposite to the substrate 100. The first encapsulation layer 610 is used to implement the encapsulation function of the display panel 10 and improve the problem of moisture intrusion. The first encapsulation layer 610 is located on the side of the corresponding light-emitting functional layer 400 opposite to the substrate 100.

[0129] Optionally, the material of the first encapsulation layer 610 includes inorganic materials, which gives the first encapsulation layer 610 good density and can improve the sealing effect of the first encapsulation layer 610.

[0130] Optionally, the material of the first encapsulation layer 610 includes one or more of silicon oxide, silicon nitride, and silicon oxynitride.

[0131] Optionally, the second encapsulation layer 620 is located on the side of the first encapsulation layer 610 away from the substrate 100 to further improve the encapsulation effect.

[0132] Optionally, the material of the second encapsulation layer 620 includes an organic material, which makes the second encapsulation layer 620 have a suitable thickness, thereby improving the problem of uneven film surface of the encapsulation layer 600.

[0133] Optionally, the second encapsulation layer 620 can be prepared by inkjet printing (IJP) technology, so that the second encapsulation layer 620 has a suitable thickness.

[0134] Optionally, the display panel 10 may also include a third encapsulation layer 630, which is located on the side of the second encapsulation layer 620 away from the substrate 100.

[0135] Optionally, the material of the third encapsulation layer 630 may include inorganic materials. The encapsulation layer 600 includes a first encapsulation layer 610, a second encapsulation layer 620, and a third encapsulation layer 630. The encapsulation layer 600 has a sandwich structure, which can further improve the encapsulation effect.

[0136] Optionally, the third encapsulation layer 630 and the first encapsulation layer 610 are made of the same material, which gives the third encapsulation layer 630 good density and allows the third encapsulation layer 630 and the first encapsulation layer 610 to be manufactured using the same process equipment and materials, thereby reducing the manufacturing cost of the display panel 10.

[0137] Optionally, the side of the encapsulation layer 600 facing away from the substrate 100 may also include a touch layer 800, which is used to implement the touch function of the display panel 10.

[0138] Optionally, the side of the touch layer 800 facing away from the substrate 100 may also include a glass cover to provide protection for the display panel 10.

[0139] A second aspect of this application provides a method for manufacturing a display panel 10, such as... Figure 2 and Figure 7 As shown, it includes:

[0140] Step S100: A first electrode layer 500 is prepared on the substrate 100. The first electrode layer 500 includes a plurality of first electrodes 501 spaced apart.

[0141] Step S200: A metasurface structure 300 is prepared on the side of the first electrode 501 away from the substrate 100. The metasurface structure 300 is configured to absorb light of a preset wavelength.

[0142] Step S300: A pixel definition layer 200 is prepared on the side of the first electrode 501 away from the substrate 100. The pixel definition layer 200 includes a pixel limiting portion 210 and a pixel opening 220 formed by the pixel limiting portion 210. A plurality of pixel openings 220 are arrayed and distributed, and the pixel openings 220 and the first electrode 501 are set in a one-to-one correspondence.

[0143] Step S400: A light-emitting functional layer 400 and a second electrode layer 510 are sequentially formed on the side of the pixel definition layer 200 facing away from the substrate 100.

[0144] In these optional embodiments, the first electrode layer 500 is prepared in step S100, the metasurface structure 300 is prepared in step S200, the pixel opening 220 is prepared in step S300, and the light-emitting functional layer 400 and the second electrode layer 510 are sequentially formed in step S400. In this embodiment, the metasurface absorbs ambient light through local resonance or waveguide mode, replacing the polarization filtering function of the polarizer and reducing screen reflectivity. The grooves form light traps, extending the optical path through multiple reflections / scatterings and improving the ambient light absorption efficiency. Specific wavelengths of ambient light are absorbed according to different periods and sizes, reducing reflectivity. The thickness is much smaller than the working wavelength (typically in the nanometer to micrometer range), breaking through the volume limitations of traditional optical elements. The size of the structural units is smaller than or close to the electromagnetic wave wavelength. By designing the arrangement of the metasurface units 310, precise control of electromagnetic waves is achieved. While reducing reflectivity, the requirements for the thinness of the display panel 10 are met, improving the performance of the display panel 10.

[0145] In some alternative embodiments, such as Figure 2 and Figure 8 As shown, step S200 further includes:

[0146] Step S210: Electron etching is performed on the first electrode 501 to form a metasurface unit 310, and multiple metasurface units 310 are spaced apart and arranged in an array.

[0147] Optionally, step S400 may further include:

[0148] Step S410: Pattern the material layer of the second electrode 511 to obtain the second electrode 511. Multiple second electrodes 511 are located in the pixel opening 220. The second electrodes 511 are located on the side of the light-emitting functional layer 400 away from the substrate 100.

[0149] Optional, such as Figure 2 and Figure 9 As shown, step S410 further includes:

[0150] The material layer of the second electrode 511 is patterned to obtain the connecting electrode 512, which is connected between two adjacent second electrodes 511.

[0151] In these alternative embodiments, electron beam etching offers high precision and is suitable for fabricating subwavelength structures of metasurfaces (such as nanoantennas and dielectric pillars), allowing for precise control of the phase, polarization, and other characteristics of light waves. Patterns are directly "drawn" by controlling the electron beam, eliminating the need for physical masks.

[0152] The display device according to the third aspect of this application includes a display panel 10 prepared by the display panel 10 provided by any of the embodiments of the first aspect above or the display panel 10 preparation method provided by any of the embodiments of the second aspect above.

[0153] Since the display device of the embodiment of the third aspect of this application includes the display panel 10 provided in any of the first aspect embodiments or the display panel 10 prepared by the method for preparing the display panel 10 provided in any of the second aspect embodiments, the display device of the embodiment of the third aspect of this application has the beneficial effects of the display panel 10 provided in any of the first aspect embodiments or the display panel 10 prepared by the method for preparing the display panel 10 provided in any of the second aspect embodiments, which will not be elaborated here.

[0154] The display devices in this application include, but are not limited to, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, control consoles, and other devices with display functions.

[0155] The embodiments described above are not exhaustive and do not limit the invention to specific examples. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to effectively utilize this application and its modifications. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that, The display panel includes: substrate; A first electrode layer is disposed on one side of the substrate and includes a plurality of first electrodes spaced apart. A pixel definition layer is disposed on the side of the first electrode layer away from the substrate. The pixel definition layer includes a pixel defining portion and a pixel opening formed by the pixel defining portion. A plurality of pixel openings are distributed in an array, and the pixel openings are disposed in a one-to-one correspondence with the first electrode. The light-emitting functional layer includes a plurality of light-emitting units arranged at intervals, at least a portion of which is correspondingly disposed within the pixel opening and located on the side of the first electrode away from the substrate; The second electrode layer is located on the side of the light-emitting functional layer opposite to the first electrode, and at least a portion of the second electrode layer is located in the pixel opening; The first electrode has a metasurface structure on the side of its surface facing away from the substrate. The metasurface structure is configured to absorb light of a preset wavelength. The metasurface structure includes a plurality of metasurface units disposed on the surface of the first electrode facing away from the substrate. Adjacent metasurface units are spaced apart to form a groove. At least a portion of the metasurface units and the grooves are located within the pixel opening, so that the metasurface structure resonates with the light of the preset wavelength and absorbs the light.

2. The display panel according to claim 1, characterized in that, The light-emitting unit includes a first type of unit and a second type of unit with different light-emitting colors. The metasurface structure is configured to absorb the first type of unit and the second type of unit. The height of the metasurface unit along the thickness direction of the display panel and / or the spacing between two adjacent metasurface units ranges from 10nm to 1000nm. The preset wavelength range is 490nm-505nm, and / or 585nm-600nm; Preferably, the thickness of the first electrode along the thickness direction of the display panel is 10nm-15nm; Preferably, the metasurface unit is integrally formed with the first electrode; Preferably, the plurality of metasurface units are spaced apart and arranged in an array; Preferably, the cross-section of the metasurface unit along the thickness direction of the display panel is at least one of a circle, an ellipse, a rectangle, and a triangle; Preferably, the top wall of the metasurface unit on the side opposite to the substrate is recessed toward the substrate; Preferably, the cross-section of the top wall along the thickness direction of the display panel is arc-shaped; Preferably, the top wall is part of a sphere.

3. The display panel according to claim 2, characterized in that, The light-emitting unit includes a first type of unit and a second type of unit with different light-emitting colors. The height of the metasurface unit corresponding to the first type of unit along the thickness direction of the display panel is equal to the height of the metasurface unit corresponding to the second type of unit along the thickness direction of the display panel, and / or, the spacing between two adjacent metasurface units corresponding to the first type of unit is greater than or equal to the spacing between two adjacent metasurface units corresponding to the second type of unit. Preferably, the light-emitting unit further includes a third type of unit, wherein the light-emitting colors of the first type of unit, the second type of unit, and the third type of unit are different from each other, the height of the metasurface unit corresponding to the second type of unit along the thickness direction of the display panel is equal to the height of the metasurface unit corresponding to the third type of unit along the thickness direction of the display panel, and / or, the spacing between two adjacent metasurface units corresponding to the second type of unit is greater than or equal to the spacing between two adjacent metasurface units corresponding to the third type of unit; Preferably, the spacing between two adjacent metasurface units corresponding to the first type of unit is 280nm-500nm, and / or the spacing between two adjacent metasurface units corresponding to the second type of unit is 170nm-280nm; Preferably, the spacing between two adjacent metasurface units corresponding to the third type of unit is 100nm-200nm; Preferably, the height of the metasurface unit corresponding to the first type of unit along the thickness direction of the display panel is 50nm-200nm; Preferably, the height of the metasurface unit corresponding to the second type of unit along the thickness direction of the display panel is 50nm-200nm; Preferably, the height of the metasurface unit corresponding to the third type of unit along the thickness direction of the display panel is 50nm-200nm; Preferably, the metasurface units corresponding to the first type of unit, the second type of unit, and / or the third type of unit have equal heights along the thickness direction of the display panel; Preferably, the first type of unit emits light in blue, and / or the second type of unit emits light in green; Preferably, the emission color of the third type of unit is red.

4. The display panel according to claim 2, characterized in that, At least a portion of the light-emitting functional layer extends from the surface of the first electrode away from the substrate to the surface of the metasurface unit away from the substrate; Preferably, the surface of the light-emitting unit facing away from the first electrode has a flat structure.

5. The display panel according to claim 1, characterized in that, The second electrode layer further includes a connecting electrode, and a plurality of second electrodes are spaced apart at the pixel opening, wherein the connecting electrode is connected between two adjacent second electrodes; Preferably, the width of the connecting electrode is 2μm-6μm; Preferably, the orthographic projection of the second electrode onto the substrate is located within the orthographic projection of the pixel opening onto the substrate; Preferably, the second electrode and the connecting electrode are integrally formed.

6. The display panel according to claim 1, characterized in that, Also includes: An insulating layer is located on the side of the second electrode layer opposite to the substrate, and the insulating layer includes an insulating portion and a first opening formed by the insulating portion. The touch layer includes a plurality of touch electrodes spaced apart, the touch electrodes being disposed within the first opening; A light-absorbing layer is located on the side of the touch layer away from the insulating layer. The light-absorbing layer includes a plurality of light-absorbing portions, which are located on the side of the touch electrode away from the insulating layer. The light-absorbing portions are configured to absorb reflected light. Preferably, the material of the insulating layer includes at least one of organic materials and light-selective materials; Preferably, the light-selective material is configured to absorb light with wavelengths in the range of 490nm-505nm and 585nm-600nm. Preferably, the touch electrode is disposed at an interval between the orthographic projection of the substrate and the orthographic projection of the pixel opening on the substrate; Preferably, the touch electrode includes a first touch electrode and a second touch electrode arranged sequentially at intervals on the side opposite to the substrate; Preferably, the material of the light-absorbing layer includes at least one of inorganic materials, metals, and metal compounds; Preferably, the material of the light-absorbing layer includes at least one of silicon nitride and silicon oxide; Preferably, the material of the pixel definition layer includes a light-shielding material.

7. The display panel according to claim 1, characterized in that, Also includes: The encapsulation layer is located on the side of the second electrode layer opposite to the substrate; A light-selective layer is located on the side of the encapsulation layer opposite to the substrate, and the light-selective layer includes a light-selective material; Preferably, the display panel further includes a touch layer, and the light selection layer is located between the encapsulation layer and the touch layer; Preferably, the light-selective material is configured to absorb light with wavelengths in the range of 490nm-505nm and 585nm-600nm.

8. A method for manufacturing a display panel, characterized in that, include: A first electrode layer is fabricated on a substrate, the first electrode layer comprising a plurality of spaced-apart first electrodes; A metasurface structure is fabricated on the side of the first electrode away from the substrate, and the metasurface structure is configured to absorb light of a preset wavelength. A pixel definition layer is prepared on the side of the first electrode away from the substrate. The pixel definition layer includes a pixel defining portion and a pixel opening formed by the pixel defining portion. A plurality of pixel openings are distributed in an array. The pixel openings are configured to correspond one-to-one with the first electrode. A light-emitting functional layer and a second electrode layer are sequentially formed on the side of the pixel definition layer opposite to the substrate.

9. The method for manufacturing a display panel according to claim 8, characterized in that, The step of fabricating a metasurface structure on the side of the first electrode away from the substrate, wherein the metasurface structure is configured to absorb light of a predetermined wavelength, further includes: The first electrode is electron-etched to form a metasurface unit, and a plurality of the metasurface units are spaced apart and arranged in an array; Preferably, the step of sequentially forming a light-emitting functional layer and a second electrode layer on the side of the pixel definition layer opposite to the substrate further includes: The second electrode is obtained by patterning the second electrode material layer. Multiple second electrodes are located at the pixel opening and the second electrodes are located on the side of the light-emitting functional layer away from the substrate. Preferably, the step of patterning the second electrode material layer to obtain the second electrode, wherein a plurality of the second electrodes are located at the pixel opening, and the second electrodes are located on the side of the light-emitting functional layer opposite to the substrate, further includes: The second electrode material layer is patterned to obtain a connecting electrode, which is connected between two adjacent second electrodes.

10. A display device, characterized in that, The display panel includes the display panel according to any one of claims 1-7 or the display panel prepared by the method of preparing the display panel according to any one of claims 8-9.

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