Display panel and display device

Abstract

The application provides a display panel and a display device. The display panel comprises a substrate, a light-emitting device layer arranged on one side of the substrate, the light-emitting device layer comprising a plurality of light-emitting units, each light-emitting unit comprising an anode, a light-emitting functional layer and a cathode arranged in layers; the anode has a concave-convex structure on the side away from the substrate; and a wavelength-selective absorption layer arranged on the side of the light-emitting device layer away from the substrate and configured to absorb light of a preset wavelength in external ambient light and light emitted by the light-emitting units; the preset wavelength comprises at least one of a wavelength between a red light wavelength band and a green light wavelength band, a wavelength between the green light wavelength band and a blue light wavelength band, a wavelength smaller than the blue light wavelength band and a wavelength larger than the red light wavelength band. The display panel effectively improves the light-emitting efficiency of the display panel, reduces the reflectivity of external ambient light and improves the contrast of the display panel.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0002] With the continuous development of display technology, OLED (Organic Light Emitting Diode) display panels have gained widespread attention due to their advantages such as low energy consumption, low production cost, self-emissiveness, wide viewing angle, and fast response speed. OLEDs are widely used in high-end consumer electronics products, such as smartphones, televisions, computers, tablets, and automotive displays.

[0003] However, the current display panels have low light emission efficiency and high ambient light reflectivity, resulting in poor display performance. Summary of the Invention

[0004] The display panel provided in this application aims to solve the problem that existing display panels have low light emission efficiency and high ambient light reflectivity, resulting in poor display effects.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a display panel, the display panel comprising:

[0006] Substrate;

[0007] A light-emitting device layer is disposed on one side of the substrate. The light-emitting device layer includes a plurality of light-emitting units. Each light-emitting unit includes an anode, a light-emitting functional layer, and a cathode stacked together. The surface of the anode away from the substrate has an uneven structure.

[0008] A wavelength-selective absorption layer is disposed on the side of the light-emitting device layer away from the substrate and is configured to absorb light of a preset wavelength from external ambient light and light emitted by the light-emitting unit; the preset wavelength includes at least one of the wavelength between the red light band and the green light band, the wavelength between the green light band and the blue light band, a wavelength smaller than the blue light band, and a wavelength larger than the red light band.

[0009] In one embodiment of this application, the size range of the uneven structure is 10nm-1000nm;

[0010] Preferably, the concave-convex structure includes a plurality of protrusions spaced apart, with each pair of adjacent protrusions defining a groove; wherein the radial dimension of the protrusions ranges from 80nm to 150nm; and the groove width ranges from 100nm to 500nm.

[0011] Preferably, the groove width ranges from 180nm to 220nm;

[0012] Preferably, the height of the protrusion ranges from 50nm to 200nm;

[0013] Preferably, the cathode has a first surface and a second surface facing away from each other, with the first surface of the cathode facing the light-emitting functional layer; wherein the first surface and / or the second surface of the cathode are formed with the uneven structure; and / or at least one surface of the light-emitting functional layer has the uneven structure;

[0014] Preferably, the entire first surface of the cathode and / or the entire second surface of the cathode are formed with the uneven structure.

[0015] In one embodiment of this application, the uneven structure includes a plurality of periodically distributed metasurface units; the plurality of metasurface units are arranged in a one-to-one correspondence with a plurality of light-emitting units; the light-emitting units include red light-emitting units, green light-emitting units, and blue light-emitting units; wherein,

[0016] The concave-convex structure includes a first metasurface unit corresponding to the red light-emitting unit, and the arrangement period of the plurality of protrusions in the first metasurface unit is 150-200nm.

[0017] The concave-convex structure includes a second metasurface unit corresponding to the green light-emitting unit, and the arrangement period of the multiple protrusions in the second metasurface unit is 170-280nm.

[0018] The concave-convex structure includes a third metasurface unit corresponding to the blue light-emitting unit, and the arrangement period of the multiple protrusions in the third metasurface unit is 280-500nm.

[0019] Preferably, the groove width defined by the plurality of protrusions in the first metasurface unit is smaller than the groove width defined by the plurality of protrusions in the second metasurface unit; and the groove width defined by the plurality of protrusions in the second metasurface unit is smaller than the groove width defined by the plurality of protrusions in the third metasurface unit.

[0020] In one embodiment of this application, a pixel definition layer is disposed on one side of the substrate and defines a pixel opening; the light-emitting unit is disposed within the pixel opening; the pixel definition layer is located in the gap between two adjacent anodes, and the pixel definition layer covers at least one protrusion of the two adjacent anodes.

[0021] In one embodiment of this application, a portion of the light-emitting functional layer is embedded in each of the grooves and contacts the bottom of the groove;

[0022] Preferably, the wavelength selective absorption layer comprises multiple color filter materials, the light of the multiple color filter materials is uniformly distributed, and the wavelengths of light absorbed by any two of the color filter materials are different;

[0023] Preferably, the preset wavelength includes wavelengths in the band between 490-505nm and wavelengths in the band between 585-600nm.

[0024] In one embodiment of this application, the light-emitting device layer further includes an encapsulation layer that covers the light-emitting device layer; the display panel further includes a black matrix layer that is disposed on the side of the encapsulation layer away from the substrate;

[0025] Wherein, along the stacking direction of the display panel, the wavelength selective absorption layer is disposed between the black matrix layer and the encapsulation layer; or,

[0026] Along the stacking direction of the display panel, the wavelength selective absorption layer is disposed on the side of the black matrix layer away from the encapsulation layer; or

[0027] The encapsulation layer includes a first inorganic encapsulation layer and a second inorganic encapsulation layer, and the wavelength selective absorption layer is an organic encapsulation layer disposed between the first inorganic encapsulation layer and the second inorganic encapsulation layer.

[0028] In one embodiment of this application, it further includes:

[0029] A touch layer is disposed on the side of the light-emitting device layer away from the substrate, and includes two touch wiring layers stacked and electrically connected to each other; the wavelength selective absorption layer is a dielectric layer disposed between the two touch wiring layers and is configured to isolate the two touch wiring layers.

[0030] Preferably, the display panel further includes a black matrix layer disposed on the side of the touch layer away from the substrate.

[0031] In one embodiment of this application, it further includes:

[0032] A pixel definition layer is disposed on one side of the substrate and defines a pixel opening, wherein the light-emitting unit is located within the pixel opening;

[0033] A black matrix layer is disposed on the side of the pixel definition layer opposite to the substrate, and has a plurality of first openings spaced apart; wherein the orthographic projection of the black matrix layer on the substrate is located within the orthographic projection of the pixel definition layer on the substrate;

[0034] Preferably, the orthographic projection of the first opening on the substrate covers the orthographic projection of the pixel opening on the substrate.

[0035] In one embodiment of this application, it further includes:

[0036] A touch layer is disposed on the side of the light-emitting device layer away from the substrate, and includes two touch wiring layers that are stacked and electrically connected to each other.

[0037] A black matrix layer is disposed between the two touch trace layers and also serves as a dielectric layer between the two touch trace layers; wherein, the black matrix layer has a plurality of first openings spaced apart, and the orthographic projection of the first opening on the substrate at least partially overlaps with the orthographic projection of the pixel opening defined by the pixel definition layer on the substrate.

[0038] Preferably, the wavelength-selective absorption layer is disposed on the side of the touch layer away from the substrate.

[0039] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a display device, which includes the display panel mentioned above.

[0040] The beneficial effects of the embodiments of this application, which differ from the prior art, are as follows: The display panel provided in the embodiments of this application effectively improves the light emission efficiency of the display panel by removing the polarizer. Simultaneously, by forming an uneven structure on at least one surface of the anode, the light-emitting functional layer, and the cathode, the uneven structure can absorb other light with wavelengths different from the light emitted by the light-emitting unit and reflect light with the same wavelength as the light emitted by the light-emitting unit, thereby filtering external ambient light and reducing the amount of external ambient light emitted from the light-emitting side of the display panel. This prevents external ambient light from affecting the color purity of the light emitted from the light-emitting side of the display panel. Correspondingly, since less external ambient light is emitted from the light-emitting side of the display panel, the reflectivity of external ambient light is reduced, thus improving the contrast of the display panel. Furthermore, by further setting a wavelength selective absorption layer on the light-emitting side of the light-emitting device layer, the display panel can further absorb other light with wavelengths different from the light emitted by the light-emitting unit and reflect light with the same wavelength as the light emitted by the light-emitting unit, thereby further filtering external ambient light and further reducing the reflectivity of external ambient light; and narrowing the spectral width of the light emitted from the light-emitting side of the display panel, thereby improving the color purity of the light emitted from the light-emitting side of the display panel, thus improving the display effect of the display panel and avoiding color deviation of the display panel. Attached Figure Description

[0041] Figure 1 A cross-sectional view of the display panel provided in the first embodiment of this application;

[0042] Figure 2 This is a schematic diagram of the metasurface structure on the anode surface;

[0043] Figures 3 to 6 Cross-sectional views of the display panels provided in the second to fifth embodiments of this application;

[0044] Figures 7 to 10 A schematic diagram illustrating the arrangement positions of the wavelength-selective absorption layer, touch layer, and black matrix layer in different embodiments of this application;

[0045] Figure 11 This is a schematic diagram of the structure of a display device provided in an embodiment of this application.

[0046] Explanation of reference numerals in the attached figures

[0047] 100 Display panel; 1 Substrate; 2 Array circuit layer; 3 Pixel definition layer; 4 Light-emitting unit; 41 Anode; 411 Protrusion; 412 Groove; 42 Light-emitting functional layer; 43 Cathode; 5 Isolation structure; 51 First isolation part; 52 Second isolation part; 53 Third isolation part; 6 Encapsulation layer; 61 First inorganic encapsulation layer; 62 Organic encapsulation layer; 63 Second inorganic encapsulation layer; 7 Black matrix layer; 71 First opening; 8 Planarization layer; 9 Touch layer; 91 Touch trace layer; 10 Wavelength selective absorption layer; 11 Cover plate. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0049] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0050] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0051] OLED (Organic Light Emitting Diode) is a self-emissive display technology with broad application prospects, especially in high-end consumer electronics products such as smartphones, televisions, computers, tablets, and automotive displays.

[0052] In related technologies, OLED display panels include a cover glass, polarizer, touch panel (TP), encapsulation layer, light-emitting device layer, array circuit layer, and substrate. Natural light, after passing through the polarizer, becomes left-handed circularly polarized and, after reflection by the screen, cannot pass through the polarizer again, resulting in almost zero reflected light. Light emitted from the light-emitting device layer, after passing through the polarizer, has its vibration direction perpendicular to the optical axis absorbed. Therefore, less than 50% of the light energy is transmitted through the polarizer, resulting in significantly low light extraction efficiency.

[0053] To address this, Samsung has introduced the COE (Color Filter On Encapsulation) structure, which consists of a color filter (CF) region and a black matrix (BM) region. The BM region absorbs ambient light. The CF region includes red (R) filter regions, green (G) filter regions, and blue (R) filter regions. Different color filter regions can absorb other colors of light while transmitting or reflecting their own color light. The pixel emitting area utilizes the CF color filter material to reflect specific wavelengths, while the non-pixel emitting area utilizes the BM to absorb light. After the light emitted by the emitting unit passes through the color filter material, approximately 70% is transmitted; this is superior to OLEDs with polarizers, where approximately 43% of the light emitted by the emitting unit is transmitted after passing through the color filter material.

[0054] However, the COE structure consists of three photolithography processes (R / G / B) and one BM photolithography process, which is complex, uses expensive materials, has low production efficiency, and is costly.

[0055] Based on this, embodiments of this application provide a novel display panel that improves light extraction efficiency by removing the polarizer from an OLED display panel. Furthermore, by forming a metasurface structure on the surface of the anode, anode, and / or light-emitting functional layer, not only are multiple photolithography processes for fabricating the COE structure eliminated, simplifying the process, reducing costs, accelerating production efficiency, and thinning the overall thickness of the display panel, but the reflectivity of the display panel is also reduced, thus improving contrast.

[0056] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0057] Please see Figure 1 , Figure 1 This is a cross-sectional view of a display panel provided in the first embodiment of this application. In this embodiment, a display panel 100 is provided for displaying images during operation. The display panel 100 may be an OLED display panel. The display panel 100 includes a substrate 1, an array circuit layer 2, a pixel definition layer 3, and a light-emitting device layer. The array circuit layer 2 is disposed on one side of the substrate 1, and the light-emitting device layer is disposed on the side of the array circuit layer 2 away from the substrate 1, and the light-emitting device layer includes a plurality of light-emitting units 4.

[0058] Substrate 1 serves a supporting function in display panel 100. It can be a flexible substrate or a rigid substrate. When substrate 1 is a flexible substrate, its material can be polyimide (PI), or it can be a multilayer structure with alternating organic and inorganic layers. For example, substrate 1 includes inorganic layers, organic layers, and inorganic layers stacked sequentially. In this case, the multilayer structure with alternating organic and inorganic layers can balance the flexibility and strength of substrate 1, making display panel 100 bendable and resistant to breakage and deformation. When substrate 1 is a rigid substrate, its material can be glass or metal. This application does not limit the structure of substrate 1.

[0059] The array circuit layer 2 includes a pixel driving circuit, which includes transistors and storage capacitors. The transistors include a semiconductor portion, a gate, a source, and a drain. The capacitors include a first electrode and a second electrode. The gate and the first electrode may be located in a first conductive layer (e.g., a metal layer), the second electrode may be located in a second conductive layer (e.g., a metal layer), and the source and drain may be located in a third conductive layer (e.g., a metal layer). Interlayer insulating layers are disposed between the first and second conductive layers, and between the second and third conductive layers. The array circuit layer 2 may also include a fourth conductive layer (e.g., a metal layer), located on the side of the third conductive layer facing away from the substrate 1, and a signal line is disposed on the fourth conductive layer, electrically connecting the pixel driving circuit and the light-emitting unit 4. A first planarization layer (PLN1) is disposed between the fourth and third conductive layers, and a second planarization layer (PLN2) may be disposed on the surface of the fourth conductive layer facing away from the substrate 1.

[0060] The third and fourth conductive layers may include signal lines for transmitting signals to the pixel driving circuit; for example, they may transmit signals such as a first voltage signal (ELVSS), a second voltage signal (ELVDD), or a data signal (DATA). In this embodiment, the third and fourth conductive layers may include signal lines for transmitting the first voltage signal ELVSS.

[0061] In one embodiment, a buffer layer may also be provided between the substrate 1 and the array circuit layer 2.

[0062] The pixel definition layer 3 can be formed of organic materials such as polyimide (PI), polyamide, benzocyclobutene (BCB), acrylic resin, or phenolic resin, or of inorganic materials such as SiNx. In one embodiment, the material of the pixel definition layer 3 includes a light-absorbing material, which can prevent crosstalk between light emitted from two adjacent light-emitting units 4.

[0063] Combination Figure 1 The pixel definition layer 3 is disposed on the surface of the second planarization layer (PLN2) and located on the side of the array circuit layer 2 facing away from the substrate 1. The pixel definition layer 3 includes a pixel definition portion, which encloses to form a pixel opening.

[0064] The light-emitting unit 4 is disposed within the pixel opening. The number of light-emitting units 4 can be one or more. When there are multiple light-emitting units 4, some light-emitting units 4 emit red light, some emit green light, and some emit blue light. It should be noted that the color of light emitted by the light-emitting unit 4 is not limited to red, green, and blue; it can also be yellow or other colors, which are not limited here.

[0065] Each light-emitting unit 4 includes an anode 41, a light-emitting functional layer 42, and a cathode 43 stacked together. The anode 41 is disposed on the surface of the array circuit layer 2 facing away from the substrate 1 and is electrically connected to the conductive layer within the array circuit layer 2. The pixel definition layer 3 covers a portion of the anode 41, and a portion of the anode 41 is exposed through a pixel opening. The light-emitting functional layer 42 is disposed within the pixel opening and is stacked on the surface of the anode 41 facing away from the substrate 1. The cathode 43 is stacked on the surface of the light-emitting functional layer 42 facing away from the anode 41.

[0066] In some embodiments, two adjacent light-emitting units 4 are spaced apart, and the anodes 41 of two adjacent light-emitting units 4 are spaced apart. The pixel definition layer 3 is located in the gap between two adjacent anodes 41 and is in direct contact with the array circuit layer 2.

[0067] In this display panel 100, at least one of the anode 41, the light-emitting functional layer 42, and the cathode 43 has a metasurface structure formed on its surface. This metasurface structure absorbs stray light (light with wavelengths different from the light emitted by the light-emitting unit 4) and reflects light with the same wavelength as the light emitted by the light-emitting unit 4, thus filtering ambient light and reducing the amount of ambient light emitted from the light-emitting side of the display panel 100. This prevents ambient light from affecting the color purity of the light emitted from the light-emitting side of the display panel 100. Consequently, since less ambient light is emitted from the light-emitting side of the display panel 100, the reflectivity of ambient light is reduced, improving the contrast of the display panel 100. Simultaneously, by absorbing stray light, the color gamut and color purity of the display panel 100 are reduced, resulting in a better display effect. Furthermore, by directly forming a metasurface structure on the surface of a structural layer of the light-emitting device layer, compared to adding an additional metasurface structure layer, this application combines two functional layers into one, resulting in a simpler structure and allowing for a thinner display panel 100.

[0068] As an example, combined Figure 1 The anode 41 has a first surface and a second surface facing away from each other. The first surface of the anode 41 faces the light-emitting functional layer 42, and the second surface of the anode 41 faces the substrate 1. A metasurface structure is formed on the first surface of the anode 41 facing the light-emitting functional layer 42. The following embodiments of this application all use this as an example.

[0069] In one embodiment, the metasurface structure is formed on the portion of the anode 41 exposed through the pixel opening. Thus, compared to forming the metasurface structure on the entire first surface of the anode 41, the metasurface structure can be formed only in a portion of the anode 41, resulting in higher production efficiency and lower cost. Simultaneously, areas on the anode 41 where no metasurface structure is formed can be electrically connected to the conductive layer within the array circuit layer 2 to improve electrical connection reliability.

[0070] As another example, the cathode 43 has a first surface and a second surface facing away from each other, with the first surface of the cathode 43 facing the light-emitting functional layer 42 and the second surface of the cathode 43 facing away from the light-emitting functional layer 42. The first surface and / or the second surface of the cathode 43 are formed with a metasurface structure.

[0071] Metasurface structures can be formed on the entire first surface and / or the entire second surface of the cathode 43. Thus, the metasurface structure on the cathode 43 located on the side surface of the pixel definition layer 3 facing away from the substrate 1 can also filter ambient light incident on the surface of the cathode 43 to further reduce the reflectivity of the display panel 100.

[0072] As another example, a metasurface structure is formed on the first surface of the anode 41 facing the light-emitting functional layer 42; and a metasurface structure can be formed on the entire first surface and / or the entire second surface of the cathode 43. By setting metasurface structures on the surfaces of different layers of the light-emitting device layer, other light rays with wavelengths different from those emitted by the light-emitting unit 4 can be absorbed multiple times, and light rays with the same wavelength as those emitted by the light-emitting unit 4 can be reflected, thereby effectively reducing the reflectivity of external ambient light.

[0073] Of course, in other examples, the surface of the light-emitting functional layer 42 facing the anode 41 and / or the surface of the light-emitting functional layer 42 away from the anode 41 may also have a metasurface structure.

[0074] In some embodiments, the metasurface structure is an uneven structure formed on the surface of the anode 41, the light-emitting functional layer 42, or the cathode 43. Taking the metasurface structure with an uneven structure formed on the first surface of the anode 41 as an example, in a specific embodiment, the uneven structure can be formed by patterning the first surface of the anode 41.

[0075] The size range of the concave-convex structure is 10nm-1000nm. Micrometer-level concave-convex structures can better absorb stray light and reflect light of the same wavelength as that emitted by the light-emitting unit 4. The size of the concave-convex structure can be 50nm, 100nm, 150nm, 200nm, 250nm, 300nm, 350nm, 400nm, 500nm, 600nm, 700nm, 800nm, 900nm, 1000nm, etc.

[0076] Among them, see Figure 2 , Figure 2This is a schematic diagram of the metasurface structure on the anode surface. The concave-convex structure includes multiple spaced protrusions 411, with each pair of adjacent protrusions 411 defining a groove 412. The protrusions 411 can be cylindrical or square. The radial dimension W1 of the protrusions 411 ranges from 80nm to 150nm; for example, the radial dimension W1 of the protrusions 411 can be 80nm, 100nm, 120nm, or 150nm. The groove width W2 of the groove 412 ranges from 100nm to 500nm; for example, the groove width W2 of the groove 412 can be 100nm, 150nm, 200nm, 250nm, 350nm, 400nm, or 500nm, etc.

[0077] As an example, the radial dimension W1 of the protrusion 411 ranges from 100nm to 120nm; the groove width W2 of the groove 412 ranges from 180nm to 220nm.

[0078] In one embodiment, the height H of the protrusion 411 ranges from 50nm to 200nm; for example, the height H of the protrusion 411 can be 50nm, 80nm, 100nm, 150nm, 180nm, 200nm, etc.

[0079] In this way, the height of the protrusion 411 in the metasurface structure can be adjusted to be close to the wavelength of the light generated by the corresponding light-emitting unit 4, so as to absorb stray light entering the display panel 100, reduce the impact on the display effect of the display panel 100, avoid stray light from interfering with the color gamut and color purity of the display panel 100 when it is emitted from the display panel 100, and improve the display effect of the display panel 100.

[0080] It should be noted that, for the display panel 100, the layout of the protrusions 411 in the metasurface structure can be reasonably designed according to the type and intensity of light that needs to be absorbed and reflected.

[0081] In some embodiments, combined with Figure 1 A portion of the light-emitting functional layer 42 is embedded within each groove 412 and contacts the bottom of the groove 412. This increases the bonding force between the light-emitting functional layer 42 and the anode 41, reducing the risk of delamination between the light-emitting functional layer 42 and the anode 41.

[0082] In some embodiments, the uneven structure includes a plurality of periodically distributed metasurface units; the plurality of metasurface units are arranged in a one-to-one correspondence with a plurality of light-emitting units 4. The light-emitting units 4 include red light-emitting units, green light-emitting units, and blue light-emitting units. The arrangement period of the protrusions 411 in the metasurface units corresponding to the different colors of light-emitting units 4 is different, and / or the size of the protrusions 411 is different.

[0083] The concave-convex structure specifically includes a first metasurface unit, a second metasurface unit, and a third metasurface unit. The first metasurface unit corresponds to the red light-emitting unit, and the arrangement period of the multiple protrusions 411 within the first metasurface unit is 150-200 nm. The second metasurface unit corresponds to the green light-emitting unit, and the arrangement period of the multiple protrusions 411 within the second metasurface unit is 170-280 nm. The third metasurface unit corresponds to the blue light-emitting unit, and the arrangement period of the multiple protrusions 411 within the third metasurface unit is 280-500 nm.

[0084] In some embodiments, combined with Figure 1 The pixel definition layer 3 covers at least one protrusion 411 on two adjacent anodes 41 to ensure that the part of the anode 41 exposed through the pixel opening has a metasurface structure, thereby filtering the light incident into the pixel opening and irradiating the first surface of the anode 41 to reduce the reflectivity of ambient light; at the same time, it can improve the bonding force between the anode 41 and the array circuit layer 2.

[0085] In some embodiments, see Figure 3 , Figure 3 This is a cross-sectional view of the display panel 100 provided in the second embodiment of this application. The display panel 100 further includes an isolation structure 5, which is disposed on the side of the pixel definition layer 3 (e.g., a pixel definition portion) facing away from the substrate 1. Alternatively, the pixel definition layer 3 has a clearance opening, and the isolation structure 5 is located in the clearance opening. The isolation structure 5 encloses and forms a plurality of isolation openings, which communicate with corresponding pixel openings, for example, one isolation opening corresponds to one pixel opening. At least a portion of the light-emitting unit 4 is located in the corresponding isolation opening. The orthographic projection of the isolation structure 5 on the substrate 1 is located within the gap and notch of the orthographic projection of the light-emitting unit 4 on the substrate 1, that is, the position of the isolation opening is the position of the light-emitting unit 4.

[0086] By enclosing multiple isolation openings, the isolation structure 5 can be mesh-like. During the fabrication of the light-emitting unit 4, all the film layers in all the light-emitting units 4 can be vapor-deposited on the entire surface. At the edge of the isolation structure 5, due to the presence of step differences, the film layers of these light-emitting units 4 will be broken, so that each light-emitting unit 4 formed is completely located in the isolation opening. In this way, the fabrication of the light-emitting unit 4 does not require the use of a mask for alignment, that is, there is no problem with alignment accuracy, and the position of the light-emitting unit 4 can be accurately located.

[0087] The isolation structure 5 includes a conductive material, which may include aluminum, titanium and / or molybdenum.

[0088] In this embodiment, the inner wall surface of the isolation structure 5 facing the isolation opening can also be formed with a metasurface structure. In this way, the metasurface structure on the surface of the isolation structure 5 can be used to absorb other light rays with wavelengths different from the light emitted by the light-emitting unit 4, and reflect light rays with the same wavelength as the light emitted by the light-emitting unit 4, thereby further reducing the reflectivity of ambient light and improving the light emission efficiency of the light-emitting unit 4.

[0089] In one embodiment, the isolation structure 5 includes a first isolation portion 51 and a second isolation portion 52. The second isolation portion 52 is disposed on the surface of the first isolation portion 51 facing away from the substrate 1; and the orthographic projection of the side of the first isolation portion 51 away from the substrate 1 onto the substrate 1 lies within the orthographic projection of the second isolation portion 52 onto the substrate 1, that is, the isolation structure 5 has a shape that is wider at the top and narrower at the bottom, which can increase the isolation effect of the isolation structure 5 on the light-emitting unit 4. The vertical cross-section of the first isolation portion 51 can be trapezoidal to increase the support strength; the second isolation portion 52 can be referred to as the crown. The orthographic projection area of ​​the side of the first isolation portion 51 away from the substrate 1 onto the substrate 1 is smaller than the orthographic projection area of ​​the second isolation portion 52 onto the substrate 1. The cross-section of the isolation structure 5 perpendicular to the substrate 1 can be T-shaped.

[0090] In this embodiment, the surface of the first isolation part 51 facing the isolation opening also has a metasurface structure to absorb other light rays with different wavelengths than the light emitted by the light-emitting unit 4 that are irradiated onto the isolation structure 5, and to reflect light rays with the same wavelength as the light emitted by the light-emitting unit 4, so as to filter the external ambient light and further reduce the reflectivity of the ambient light.

[0091] The second isolation section 52 includes a conductive material, which may include a metal, such as titanium.

[0092] In one embodiment, see Figure 4 , Figure 4This is a cross-sectional view of the display panel 100 provided in the third embodiment of this application. To increase the adhesion between the isolation structure 5 and the pixel definition layer 3 and improve their bonding strength, the isolation structure 5 further includes a third isolation portion 53, which is disposed between the first isolation portion 51 and the substrate 1. The adhesion between the third isolation portion 53 and both the first isolation portion 51 and the pixel definition layer 3 is good. The first isolation portion 51, the second isolation portion 52, and the third isolation portion 53 are all made of conductive materials, such as copper, aluminum, or other conductive metals. Specifically, the material of the first isolation portion 51 can be aluminum; the material of the second isolation portion 52 can be titanium (Ti); and the material of the third isolation portion 53 can be a molybdenum (Mo) layer. For example, the orthographic projection of the first isolation portion 51 onto the substrate 1 is located within the orthographic projection of the third isolation portion 53 onto the substrate 1. For example, the orthographic projection area of ​​the side of the first isolation portion 51 away from the substrate 1 on the substrate 1 is smaller than the orthographic projection area of ​​the third isolation portion 53 onto the substrate 1. The cross-section of the isolation structure 5 perpendicular to the substrate 1 can be I-shaped.

[0093] In this embodiment, the surface of the third isolation portion 53 facing away from the substrate 1 also has a metasurface structure, so that the third isolation portion 53 absorbs other light rays with different wavelengths than the light emitted by the light-emitting unit 4 that are irradiated onto its surface, and reflects light rays with the same wavelength as the light emitted by the light-emitting unit 4, thereby filtering the external ambient light and reducing the reflectivity of the ambient light.

[0094] In one embodiment, see Figure 4 The display panel 100 also includes an encapsulation layer 6 and a black matrix layer 7. The encapsulation layer 6 is located on the side of the light-emitting device layer away from the substrate 1 and is used to encapsulate the light-emitting device layer, which helps to prevent external moisture and oxygen from affecting the light-emitting device layer.

[0095] The encapsulation layer 6 includes a first inorganic encapsulation layer 61, an organic encapsulation layer 62, and a second inorganic encapsulation layer 63. The first inorganic encapsulation layer 61 is located on the side of the corresponding light-emitting unit 4 away from the substrate 1. The first inorganic encapsulation layer 61 comprises inorganic materials. The first inorganic encapsulation layer 61 corresponds to different light-emitting units 4 with different emission colors. In one embodiment, multiple first inorganic encapsulation layers 61 are spaced apart. For example, one light-emitting unit 4 corresponds to one first inorganic encapsulation layer 61.

[0096] The organic encapsulation layer 62 is located on the side of the plurality of first inorganic encapsulation layers 61 away from the substrate 1. The organic encapsulation layer 62 covers the plurality of first inorganic encapsulation layers 61, the isolation structure 5, the light-emitting unit 4, and the pixel definition layer 3; and the surface of the organic encapsulation layer 62 facing away from the substrate 1 has a flat structure.

[0097] The second inorganic encapsulation layer 63 is located on the side of the organic encapsulation layer 62 away from the substrate 1. The organic encapsulation layer 62 employs organic encapsulation, while the second inorganic encapsulation layer 63 employs inorganic encapsulation. In one embodiment, the organic encapsulation layer 62 and the second inorganic encapsulation layer 63 can be made of any encapsulation material, such as inorganic encapsulation, organic encapsulation, and inorganic-organic composite encapsulation. The inorganic-organic composite encapsulation material combines the advantages of good water and oxygen barrier properties of inorganic encapsulation materials with the good film-forming properties of organic encapsulation materials.

[0098] Combination Figure 4 The black matrix layer 7 is disposed on the side of the encapsulation layer 6 away from the substrate 1, and the black matrix layer 7 includes a plurality of first openings 71 spaced apart. The orthographic projection of the first opening 71 on the substrate 1 overlaps at least partially with the orthographic projection of the pixel opening formed by the pixel definition layer 3 on the substrate 1; thus, it can be ensured that the light emitted by the light-emitting unit 4 disposed in the pixel opening can be emitted from the light-emitting side of the display panel 100 through the first opening 71.

[0099] As an example, the orthographic projection of the first opening 71 onto the substrate 1 covers the orthographic projection of the pixel opening onto the substrate 1. This reduces the risk of the black matrix layer 7 obscuring the light-emitting unit 4, and also reduces the impact of the black matrix layer 7 on the light-emitting efficiency of the light-emitting unit 4.

[0100] The black matrix layer 7, except for the multiple first openings 71, has an opaque structure. Optionally, the areas of the black matrix layer 7 other than the multiple first openings 71 may be coated with an opaque black light-blocking dye. The black matrix layer 7 is used to block part of the reflected ambient light when it enters the interior of the display panel 100 and is reflected by transistors and other structures within the display panel 100, thereby reducing the reflectivity of the display panel 100.

[0101] In some embodiments, the display panel 100 further includes a planarization layer 8 that covers the black matrix layer 7 and planarizes the side surface of the black matrix layer 7 facing away from the encapsulation layer 6.

[0102] In some embodiments, please continue reading Figure 4 and Figure 5 , Figure 5 This is a cross-sectional view of a display panel 100 provided in the fourth embodiment of this application; the display panel 100 further includes a touch layer 9, which includes two stacked and electrically connected touch wiring layers 91 and a dielectric layer located between the two touch wiring layers 91. The touch wiring layers 91 may be made of an opaque material, for example, an opaque metal. The dielectric layer is used to isolate the two touch wiring layers 91. In some embodiments, such as... Figure 4 As shown, the touch layer 9 can be disposed between the encapsulation layer 6 and the black matrix layer 7.

[0103] In other embodiments, such as Figure 5 As shown above, Figures 1 to 4 The difference in the corresponding display panel 100 is that the black matrix layer 7 serves as the dielectric layer between the two touch wiring layers 91 of the touch layer 9. In this way, the touch wiring layers 91 of the touch layer 9 are covered by the black matrix layer 7, which can reduce the reflectivity; at the same time, there is no need to set an insulating dielectric layer between the two touch wiring layers 91, which can reduce the overall thickness and process complexity of the display panel 100 and save material costs.

[0104] In this embodiment, the orthographic projection of the touch wiring layer 91 on the substrate 1 can be spaced apart from the orthographic projection of the first opening 71 on the substrate 1. In this way, the touch wiring layer 91 will not block the light-emitting unit 4, and the influence of the touch wiring layer 91 on the light-emitting unit 4 after the touch wiring layer 91 is integrated with the black matrix layer 7 can be effectively reduced.

[0105] In this embodiment, the orthographic projection of the touch wiring layer 91 on the substrate 1 falls within the orthographic projection of the pixel definition layer 3 on the substrate 1; that is, the orthographic projection of the touch wiring layer 91 on the substrate 1 falls within the orthographic projection of the pixel definition layer on the substrate 1. Similarly, this avoids the touch wiring layer 91 blocking the light-emitting unit 4, and can effectively reduce the impact of the black matrix layer 7 and the touch wiring layer 91 on the light-emitting efficiency of the light-emitting unit 4 after the touch wiring layer 91 is integrated with the black matrix layer 7.

[0106] In some embodiments, see Figure 6 , Figure 6 This is a cross-sectional view of the display panel 100 provided in the fifth embodiment of this application; and related to the above. Figures 1 to 5 The difference in the corresponding embodiment is that the display panel 100 further includes a wavelength selective absorption layer 10. The wavelength selective absorption layer 10 is disposed on the side of the light-emitting device layer away from the substrate 1, and the wavelength selective absorption layer 10 is configured to absorb light of a preset wavelength from the external ambient light and the light emitted by the light-emitting unit 4.

[0107] This embodiment further provides a wavelength selective absorption layer 10 on the light-emitting side of the light-emitting device layer. The wavelength selective absorption layer 10 can further absorb other light rays with wavelengths different from the light emitted by the light-emitting unit 4 and reflect light rays with the same wavelength as the light emitted by the light-emitting unit 4, so as to further filter the external ambient light and further reduce the reflectivity of the external ambient light; and narrow the spectral width of the light emitted from the light-emitting side of the display panel 100, thereby improving the color purity of the light emitted from the light-emitting side of the display panel 100, thereby improving the display effect of the display panel 100 and avoiding color deviation of the display panel 100.

[0108] In other words, the wavelength selective absorption layer 10 can filter the directly incident ambient light, reducing the amount of ambient light incident on the light-emitting device layer and the array circuit layer 2, thus reducing the amount of ambient light incident on the display panel 100. When the amount of ambient light incident on the display panel 100 is reduced, the impact of ambient light on the color purity of the light emitted from the light-emitting side of the display panel 100 is smaller. Other ambient light that passes through the wavelength selective absorption layer 10 and enters the display panel 100 will be incident on the light-emitting device layer and the array circuit layer 2 and reflected. The reflected ambient light then passes through the wavelength selective absorption layer 10 again, and the wavelength selective absorption layer 10 filters the reflected ambient light, thereby reducing the amount of reflected ambient light emitted from the light-emitting surface of the display panel 100 and narrowing the spectral width of the ambient light emitted from the light-emitting surface of the display panel 100.

[0109] The preset wavelength includes at least one of the following: the wavelength between red and green light wavelengths, the wavelength between green and blue light wavelengths, wavelengths shorter than blue light wavelengths, and wavelengths longer than red light wavelengths.

[0110] Specifically, the wavelengths between red and green light wavelengths refer to the wavelengths within the orange and yellow light wavelengths, the wavelengths between green and blue light wavelengths refer to the wavelengths within the cyan light wavelengths, wavelengths shorter than the blue light wavelengths refer to the wavelengths within the violet light wavelengths and the corresponding wavelengths of ultraviolet light, and wavelengths longer than the red light wavelengths refer to the corresponding wavelengths of infrared light.

[0111] As an example, the wavelength-selective absorption layer 10 absorbs light of preset wavelengths, including light with wavelengths between 490-505 nm and / or light with wavelengths between 585-600 nm.

[0112] In some embodiments, the wavelength-selective absorption layer 10 includes multiple color filter materials, which are mixed and dispersed and uniformly distributed within the wavelength-selective absorption layer 10. The wavelengths of light absorbed by any two color filter materials are different. The green material of the wavelength-selective absorption layer 10 can be designed to selectively absorb and reflect light according to desired wavelengths.

[0113] Combination Figures 6 to 10 , Figures 7 to 10 The diagram shows the structural positions of the wavelength selective absorption layer, the touch layer, and the black matrix layer in different embodiments of this application; wherein, the position of the wavelength selective absorption layer 10 may include the following different configurations.

[0114] First setting location: Combined Figure 6 Along the stacking direction of the display panel 100, the wavelength selective absorption layer 10 is disposed between the black matrix layer 7 and the encapsulation layer 6.

[0115] In one example, the touch layer 9 can be disposed on the side surface of the encapsulation layer 6 opposite to the substrate 1; the wavelength selective absorption layer 10 can be disposed on the side surface of the touch layer 9 opposite to the encapsulation layer 6; and the black matrix layer 7 can be disposed on the side surface of the wavelength selective absorption layer 10 opposite to the encapsulation layer 6.

[0116] In another example, combined Figure 7 ,and Figure 6 The difference in the corresponding embodiment is that the wavelength selective absorption layer 10 can be integrated into the touch layer 9. Specifically, the wavelength selective absorption layer 10 is a dielectric layer disposed between the two touch wiring layers 91 and is configured to isolate the two touch wiring layers 91. In this way, there is no need to place a dielectric layer between the two touch wiring layers 91 of the touch layer 9, which can reduce the overall thickness of the display panel 100, simplify the process, and reduce costs.

[0117] In this example, the black matrix layer 7 is disposed on the side surface of the touch layer 9 away from the substrate 1; and the black matrix layer 7 covers the top touch wiring layer 91.

[0118] The second setting location: combined Figure 8 Along the stacking direction of the display panel 100, the wavelength selective absorption layer 10 is disposed on the side of the black matrix layer 7 away from the encapsulation layer 6.

[0119] In one example, combining Figure 8 The touch layer 9 can be disposed on the surface of the encapsulation layer 6 opposite to the substrate 1; the black matrix layer 7 is disposed on the surface of the touch layer 9 opposite to the encapsulation layer 6. The wavelength selective absorption layer 10 can be disposed on the surface of the black matrix layer 7 opposite to the encapsulation layer 6.

[0120] In another example, combined Figure 9 ,and Figure 8 The difference in the corresponding embodiment is that the black matrix layer 7 can be integrated into the touch layer 9. Specifically, the black matrix layer 7 is disposed between the two touch wiring layers 91 and serves as the dielectric layer between the two touch wiring layers 91. The black matrix layer 7 is further configured to isolate the two touch wiring layers 91; that is, the black matrix layer 7 also serves as the dielectric layer of the touch layer 9. In this way, there is no need to add an additional dielectric layer between the two touch wiring layers 91 of the touch layer 9, which can reduce the overall thickness of the display panel 100, simplify the process, and reduce costs.

[0121] In this example, the wavelength-selective absorption layer 10 can be disposed on the surface of the touch layer 9 away from the substrate 1. The first opening 71 of the black matrix layer 7 corresponds to the pixel opening; the two touch wiring layers 91 are spaced apart from the first opening 71.

[0122] The third setting location: combined Figure 10The wavelength selective absorption layer 10 is an organic encapsulation layer 62 disposed between the first inorganic layer and the second inorganic layer. That is, the wavelength selective absorption layer 10 is integrated into the encapsulation layer 6 and also serves as the organic encapsulation layer 62 of the encapsulation layer 6. In this way, there is no need to add an additional organic encapsulation layer 62 between the first inorganic encapsulation layer 61 and the second inorganic encapsulation layer 63 of the encapsulation layer 6, which can reduce the overall thickness of the display panel 100, simplify the process, and reduce costs.

[0123] In a specific embodiment, the display panel 100 further includes a cover plate 11, which is disposed on the side of the black matrix layer 7 opposite to the light-emitting device layer, for protecting the surface of the display panel 100. Exemplarily, the cover plate 11 is a transparent cover plate to allow light to pass through. The material of the cover plate 11 can be selected as needed; for example, the material of the cover plate 11 is cellulose triacetate. Cellulose triacetate has good thermoplasticity, transparency, and mechanical properties. The cover plate 11 made of cellulose triacetate has high strength, high light transmittance, and resistance to damp heat.

[0124] The display panel 100 provided in this application embodiment effectively improves the light extraction efficiency of the display panel by removing the polarizer. Simultaneously, a metasurface structure is formed on at least one surface of the anode 41, the light-emitting functional layer 42, and the cathode 43. This not only eliminates the need for multiple photolithography processes in preparing the COE structure, simplifying the process, reducing costs, accelerating production efficiency, and thinning the overall thickness of the display panel 100, but also allows the metasurface structure to absorb other light with wavelengths different from those emitted by the light-emitting unit 4 and reflect light with the same wavelength as the light emitted by the light-emitting unit 4, thereby filtering external ambient light and reducing the amount of external ambient light emitted from the light-emitting side of the display panel 100. This prevents external ambient light from affecting the color purity of the light emitted from the light-emitting side of the display panel 100. Consequently, since less external ambient light is emitted from the light-emitting side of the display panel 100, the reflectivity of external ambient light is reduced, improving the contrast of the display panel 100. Furthermore, by further providing a wavelength selective absorption layer 10 on the light-emitting side of the light-emitting device layer, the display panel 100 can further absorb other light with wavelengths different from the light emitted by the light-emitting unit 4 and reflect light with the same wavelength as the light emitted by the light-emitting unit 4, thereby further filtering the external ambient light and further reducing the reflectivity of the external ambient light; and narrowing the spectral width of the light emitted from the light-emitting side of the display panel 100, thereby improving the color purity of the light emitted from the light-emitting side of the display panel 100, thereby improving the display effect of the display panel 100 and avoiding color shift in the display panel 100.

[0125] Please see Figure 11 , Figure 11This is a schematic diagram of the structure of a display device provided in one embodiment of this application. In this embodiment, a display device is provided, which can be a mobile phone, computer, laptop, smartwatch, etc. The display device includes the display panel 100 involved in any of the above embodiments to display an image. The specific structure and function of the display panel 100 can be found in the above descriptions, and can achieve the same or similar technical effects, which will not be repeated here.

[0126] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A display panel, characterized in that, include: Substrate; A light-emitting device layer is disposed on one side of the substrate. The light-emitting device layer includes a plurality of light-emitting units. Each light-emitting unit includes an anode, a light-emitting functional layer, and a cathode stacked together. The surface of the anode away from the substrate has an uneven structure. A wavelength-selective absorption layer is disposed on the side of the light-emitting device layer away from the substrate and is configured to absorb light of a preset wavelength from external ambient light and light emitted by the light-emitting unit; the preset wavelength includes at least one of the wavelength between the red light band and the green light band, the wavelength between the green light band and the blue light band, a wavelength smaller than the blue light band, and a wavelength larger than the red light band.

2. The display panel according to claim 1, characterized in that, The size range of the concave-convex structure is 10nm-1000nm; Preferably, the concave-convex structure includes a plurality of protrusions spaced apart, with each pair of adjacent protrusions defining a groove; wherein the radial dimension of the protrusions ranges from 80nm to 150nm; and the groove width ranges from 100nm to 500nm. Preferably, the groove width ranges from 180nm to 220nm; Preferably, the height of the protrusion ranges from 50nm to 200nm; Preferably, the cathode has a first surface and a second surface facing away from each other, with the first surface of the cathode facing the light-emitting functional layer; wherein the first surface and / or the second surface of the cathode are formed with the uneven structure; and / or at least one surface of the light-emitting functional layer has the uneven structure; Preferably, the entire first surface of the cathode and / or the entire second surface of the cathode are formed with the uneven structure.

3. The display panel according to claim 2, characterized in that, The uneven structure includes a plurality of periodically distributed metasurface units; each of the metasurface units is correspondingly arranged with a plurality of light-emitting units; the light-emitting units include red light-emitting units, green light-emitting units, and blue light-emitting units; wherein, The concave-convex structure includes a first metasurface unit corresponding to the red light-emitting unit, and the arrangement period of the multiple protrusions in the first metasurface unit is 150-200nm. The concave-convex structure includes a second metasurface unit corresponding to the green light-emitting unit, and the arrangement period of the multiple protrusions in the second metasurface unit is 170-280nm. The concave-convex structure includes a third metasurface unit corresponding to the blue light-emitting unit, and the arrangement period of the multiple protrusions in the third metasurface unit is 280-500nm. Preferably, the groove width defined by the plurality of protrusions in the first metasurface unit is smaller than the groove width defined by the plurality of protrusions in the second metasurface unit; and the groove width defined by the plurality of protrusions in the second metasurface unit is smaller than the groove width defined by the plurality of protrusions in the third metasurface unit.

4. The display panel according to claim 2, characterized in that, Also includes: A pixel definition layer is disposed on one side of the substrate and defines the pixel opening; The light-emitting unit is disposed within the pixel opening; The pixel definition layer is located in the gap between two adjacent anodes, and the pixel definition layer covers at least one protrusion of the two adjacent anodes.

5. The display panel according to claim 2, characterized in that, A portion of the light-emitting functional layer is embedded in each of the grooves and contacts the bottom of the groove; Preferably, the wavelength selective absorption layer comprises multiple color filter materials, the light of the multiple color filter materials is uniformly distributed, and the wavelengths of light absorbed by any two of the color filter materials are different; Preferably, the preset wavelength includes wavelengths in the band between 490-505nm and wavelengths in the band between 585-600nm.

6. The display panel according to claim 1, characterized in that, The light-emitting device layer further includes an encapsulation layer that covers the light-emitting device layer; the display panel further includes a black matrix layer that is disposed on the side of the encapsulation layer away from the substrate. Wherein, along the stacking direction of the display panel, the wavelength selective absorption layer is disposed between the black matrix layer and the encapsulation layer; or, Along the stacking direction of the display panel, the wavelength selective absorption layer is disposed on the side of the black matrix layer away from the encapsulation layer; or The encapsulation layer includes a first inorganic encapsulation layer and a second inorganic encapsulation layer, and the wavelength selective absorption layer is an organic encapsulation layer disposed between the first inorganic encapsulation layer and the second inorganic encapsulation layer.

7. The display panel according to claim 1, characterized in that, Also includes: A touch layer is disposed on the side of the light-emitting device layer away from the substrate, and includes two touch wiring layers stacked and electrically connected to each other; the wavelength selective absorption layer is a dielectric layer disposed between the two touch wiring layers and is configured to isolate the two touch wiring layers. Preferably, the display panel further includes a black matrix layer disposed on the side of the touch layer away from the substrate.

8. The display panel according to any one of claims 1-7, characterized in that, Also includes: A pixel definition layer is disposed on one side of the substrate and defines a pixel opening, wherein the light-emitting unit is located within the pixel opening; A black matrix layer is disposed on the side of the pixel definition layer opposite to the substrate, and has a plurality of first openings spaced apart; wherein the orthographic projection of the black matrix layer on the substrate is located within the orthographic projection of the pixel definition layer on the substrate; Preferably, the orthographic projection of the first opening on the substrate covers the orthographic projection of the pixel opening on the substrate.

9. The display panel according to any one of claims 1-7, characterized in that, Also includes: A touch layer is disposed on the side of the light-emitting device layer away from the substrate, and includes two touch wiring layers that are stacked and electrically connected to each other. A black matrix layer is disposed between the two touch trace layers and also serves as a dielectric layer between the two touch trace layers; wherein, the black matrix layer has a plurality of first openings spaced apart, and the orthographic projection of the first opening on the substrate at least partially overlaps with the orthographic projection of the pixel opening defined by the pixel definition layer on the substrate. Preferably, the wavelength-selective absorption layer is disposed on the side of the touch layer away from the substrate.

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

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