Display panel and display device

Abstract

The invention provides a display panel and a display device.The display panel comprises a substrate, a light-emitting functional layer and a cover layer structure, the light-emitting functional layer is arranged on one side of the substrate and comprises a light-emitting layer and a first electrode layer located on the side, away from the substrate, of the light-emitting layer, and the cover layer structure is arranged on the side, away from the substrate, of the light-emitting functional layer; the cover layer structure comprises a first cover layer and a low-reflection layer located on the side, facing the substrate, of the first cover layer. In the embodiment of the invention, the cover layer structure is additionally arranged in the display panel, so that the light emitting efficiency of the display panel is improved, on the basis, the low-reflection layer is integrated in the cover layer structure, and the side, facing the substrate, of the first cover layer is arranged, so that the distance between the low-reflection layer and the first electrode layer is reduced, and the light emitting efficiency of the display panel is improved. Therefore, high luminous efficiency and low reflectivity of the display panel are both considered, the use effect of the display panel is enhanced, and the application scene range of the display panel is widened.

Description

Technical Field

[0001] The present application relates to the technical field of display equipment, and in particular to a display panel and a display device. Background Art

[0002] Flat display panels such as Organic Light Emitting Diode (OLED) panels and display panels using light emitting diode (LED) devices have the advantages of high image quality, power saving, thin body and wide application range. They are widely used in various consumer electronic products such as mobile phones, televisions, personal digital assistants, digital cameras, laptops, desktop computers, etc., becoming the mainstream in display devices. Summary of the invention

[0003] Embodiments of the present application provide a display panel and a display device, which can improve the viewing experience of the display device.

[0004] In a first aspect, an embodiment of the present application provides a display panel, including:

[0005] substrate;

[0006] A light-emitting functional layer is disposed on one side of the substrate, and the light-emitting functional layer includes a light-emitting layer and a first electrode layer located on a side of the light-emitting layer away from the substrate;

[0007] The capping layer structure is arranged on the side of the light-emitting functional layer away from the substrate, and comprises a first capping layer and a low-reflection layer located on the side of the first capping layer facing the substrate.

[0008] In some embodiments, the distance between the low-reflection layer and the first electrode layer in the thickness direction of the substrate is L1, and L1 satisfies 5nm≤L1≤25nm;

[0009] In some embodiments, the thickness of the low reflection layer is L2, and L2 satisfies: 5nm≤L2≤15nm;

[0010] In some embodiments, the absorptivity of the low reflection layer is k, k satisfies: k≥0.5; and / or the refractive index of the low reflection layer is n1, n1 satisfies n1≥1;

[0011] In some embodiments, the material of the low-reflection layer includes a light-absorbing material, and the material of the low-reflection layer includes at least one of a metal, an alloy, and a metal oxide;

[0012] In some embodiments, the material of the low reflection layer includes at least one of ytterbium, bismuth, cobalt, molybdenum, titanium, zirconium, aluminum, chromium, niobium, platinum, tungsten, indium, tin, iron, nickel, tantalum, manganese, zinc, and germanium.

[0013] In some embodiments, the cap layer structure further includes a second cap layer disposed on a side of the low reflective layer facing the substrate;

[0014] In some embodiments, the capping layer structure further includes a third capping layer located on a side of the low-reflection layer facing the substrate; and / or, the capping layer structure further includes a fourth capping layer located on a side of the low-reflection layer facing away from the substrate;

[0015] In some embodiments, the first capping layer and the second capping layer are made of different materials.

[0016] In some embodiments, the material of the first cap layer includes at least one of an organic material and an inorganic material;

[0017] In some embodiments, the cap layer structure further includes a second cap layer disposed on a side of the low reflective layer facing the substrate;

[0018] Wherein, the refractive index of the first cover layer is n2, and n2 satisfies n2≥1.6; and / or, the refractive index of the second cover layer is n3, and n3 satisfies n3≥1.6;

[0019] In some embodiments, the sum of the thicknesses of the multiple capping layers in the capping layer structure is L3, and L3 satisfies: 60 nm ≤ L3 ≤ 90 nm;

[0020] In some embodiments, the refractive index of the multiple capping layers in the capping layer structure is greater than or equal to 1.6.

[0021] In some embodiments, the display panel further includes a first light shielding layer disposed on a side of the cover layer structure facing away from the substrate;

[0022] The first light shielding layer is provided with a plurality of first openings, the light emitting layer includes a plurality of light emitting parts, and the orthographic projections of the light emitting parts on the substrate overlap with the orthographic projections of the first openings on the substrate;

[0023] In some embodiments, the orthographic projection of the first light shielding layer on the substrate overlaps with the orthographic projection of the first cover layer on the substrate;

[0024] In some embodiments, an orthographic projection of the first opening on the substrate overlaps with an orthographic projection of the low-reflective layer on the substrate.

[0025] In some embodiments, the display panel further includes a second inorganic encapsulation layer disposed on a side of the cover layer structure facing away from the substrate;

[0026] In some embodiments, the first light shielding layer is located on a side of the second inorganic encapsulation layer facing the substrate;

[0027] In some embodiments, the display panel further includes an organic encapsulation layer located on a side of the second inorganic encapsulation layer facing the substrate, and the first light shielding layer is located between the second inorganic encapsulation layer and the organic encapsulation layer; or, the first light shielding layer is located between the organic encapsulation layer and the cover layer structure;

[0028] In some embodiments, the display panel further includes a first inorganic encapsulation layer located on a side of the organic encapsulation layer facing the substrate;

[0029] The first light shielding layer is located on a side of the first inorganic encapsulation layer away from the substrate; or, the first light shielding layer is located between the first inorganic encapsulation layer and the capping structure;

[0030] In some embodiments, the distance between the first light shielding layer and the first electrode layer in the thickness direction of the substrate is L4, and L4 satisfies 0<L4≤3μm.

[0031] In some embodiments, the display panel further includes a pixel definition layer, the pixel definition layer includes a pixel definition portion and a pixel opening formed by the pixel definition portion, and the plurality of light emitting portions are disposed in the plurality of pixel openings;

[0032] wherein the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the first opening on the substrate;

[0033] In some embodiments, the orthographic projection of the pixel opening on the substrate has a first edge, the orthographic projection of the first opening on the substrate has a second edge, the distance between the first edge and the second edge is D1, and D1 satisfies 0≤D1≤4μm;

[0034] In some embodiments, the pixel defining portion includes a light shielding material;

[0035] In some embodiments, the material of the pixel defining portion includes carbon black.

[0036] In some embodiments, the display panel further includes a conductive layer disposed on a side of the first light shielding layer away from the substrate, and a second light shielding layer disposed on a side of the conductive layer away from the substrate, wherein the second light shielding layer is provided with a plurality of second openings;

[0037] wherein the orthographic projection of the first opening on the substrate is located within the orthographic projection of the second opening on the substrate;

[0038] In some embodiments, the conductive layer includes a touch layer;

[0039] In some embodiments, the conductive layer includes a conductive portion, and an orthographic projection of the conductive portion on the substrate is located within an orthographic projection of the second light shielding layer on the substrate;

[0040] In some embodiments, a distance between an orthographic projection of the conductive portion on the substrate and an orthographic projection of an adjacent second opening on the substrate is D2, and D2 satisfies 0≤D2≤2 μm.

[0041] In some embodiments, the second light shielding layer includes a light shielding portion located between two adjacent second openings, and an orthographic projection of the light shielding portion on the substrate is arranged to overlap with an edge of an orthographic projection of the conductive portion on the substrate;

[0042] In some embodiments, the second light-shielding layer includes a matte material;

[0043] In some embodiments, the second light shielding layer includes blackened metal;

[0044] In some embodiments, the material of the second light shielding layer includes at least one of molybdenum, aluminum, titanium, niobium, tantalum, indium, zinc, and oxides, nitrides, and oxynitrides thereof;

[0045] In some embodiments, the material of the second light shielding layer includes molybdenum niobium oxynitride and indium zinc oxide.

[0046] In some embodiments, the niobium molybdenum oxynitride is located on a surface of the indium zinc oxide facing away from the substrate.

[0047] In some embodiments, the device further includes a first inorganic encapsulation layer disposed between the first light shielding layer and the first electrode layer, and a touch layer disposed between the first light shielding layer and the first inorganic encapsulation layer, wherein the orthographic projection of the touch layer on the substrate is located within the orthographic projection of the first light shielding layer on the substrate;

[0048] In some embodiments, the display panel further includes an organic encapsulation layer located on a side of the first inorganic encapsulation layer facing away from the substrate, and a second inorganic encapsulation layer located on a side of the organic encapsulation layer facing away from the substrate;

[0049] The first light shielding layer and the touch control layer are both located between the first inorganic encapsulation layer and the organic encapsulation layer.

[0050] In some embodiments, the optical layer is disposed on a side of the cover structure away from the substrate, and the optical layer is configured to absorb light of a specific wavelength band;

[0051] Wherein, the light-emitting layer includes a plurality of light-emitting parts, and the orthographic projection of the optical layer on the substrate covers the orthographic projection of the plurality of light-emitting parts on the substrate;

[0052] In some embodiments, the optical layer has a planar structure;

[0053] In some embodiments, the display panel further comprises a thin film encapsulation layer disposed on a side of the cover layer structure away from the substrate, and the optical layer is located on a side of the thin film encapsulation layer away from the substrate;

[0054] In some embodiments, the display panel further comprises a thin film encapsulation layer disposed on a side of the cover layer structure away from the substrate, and a second light shielding layer disposed on a side of the thin film encapsulation layer away from the substrate, wherein the second light shielding layer is provided with a plurality of second openings;

[0055] Wherein, the optical layer is partially located on the side of the second light shielding layer away from the substrate, and partially located at the second opening;

[0056] In some embodiments, the material of the optical layer includes at least one of a dye and a pigment;

[0057] In some embodiments, the material of the optical layer includes at least one of subphthalocyanine and copper phthalocyanine.

[0058] In some embodiments, it further includes an isolation structure disposed on one side of the substrate, the isolation structure encloses a plurality of isolation openings, and the light-emitting functional layer includes a light-emitting portion disposed corresponding to the isolation openings;

[0059] Wherein, the cover layer structure includes a cover layer unit arranged corresponding to the isolation opening;

[0060] In some embodiments, the first cover layer includes first cover parts located in the cover layer unit, and at least some of the first cover parts are made of different materials; and / or at least some of the first cover parts are made of different thicknesses;

[0061] In some embodiments, the material of the cover layer unit includes at least one of a dye and a pigment;

[0062] In some embodiments, the material of the capping unit includes at least one of subphthalocyanine and copper phthalocyanine;

[0063] In some embodiments, the low-reflection layer includes low-reflection parts located in the cover layer unit, and at least some of the low-reflection parts are made of different materials; and / or at least some of the low-reflection parts are made of different thicknesses.

[0064] In a second aspect, an embodiment of the present application provides a display panel, including:

[0065] substrate;

[0066] A light-emitting functional layer is disposed on one side of the substrate, the light-emitting functional layer comprises a light-emitting layer and a first electrode layer located on a side of the light-emitting layer away from the substrate, the light-emitting layer comprises a plurality of light-emitting portions;

[0067] A first light shielding layer is arranged on a side of the light-emitting functional layer away from the substrate, the first light shielding layer is provided with a plurality of first openings, and the orthographic projection of the light-emitting portion on the substrate and the orthographic projection of the first opening on the substrate are arranged to overlap;

[0068] The second inorganic encapsulation layer is arranged on a side of the first light shielding layer away from the substrate.

[0069] In some embodiments, the display panel further includes an organic encapsulation layer located on a side of the second inorganic encapsulation layer facing the substrate, and a first inorganic encapsulation layer located on a side of the organic encapsulation layer facing the substrate;

[0070] The first light shielding layer is located between the first inorganic encapsulation layer and the organic encapsulation layer; or, the first light shielding layer is located on a side of the first inorganic encapsulation layer facing the substrate;

[0071] In some embodiments, the distance between the first light shielding layer and the first electrode layer in the thickness direction of the substrate is L4, and L4 satisfies 0≤L4≤3 μm.

[0072] In some embodiments, the display panel further includes a pixel definition layer, the pixel definition layer includes a pixel definition portion and a pixel opening formed by the pixel definition portion, and the plurality of light-emitting portions in the light-emitting layer are disposed in the plurality of pixel openings;

[0073] wherein the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the first opening on the substrate;

[0074] In some embodiments, the orthographic projection of the pixel opening on the substrate has a first edge, the orthographic projection of the first opening on the substrate has a second edge, the distance between the first edge and the second edge is D1, and D1 satisfies 0≤D1≤4μm;

[0075] In some embodiments, the pixel defining portion includes a light shielding material;

[0076] In some embodiments, the material of the pixel defining portion includes carbon black.

[0077] In some embodiments, the display panel further includes a conductive layer disposed on a side of the first light shielding layer away from the substrate, and a second light shielding layer disposed on a side of the conductive layer away from the substrate, the second light shielding layer enclosing a plurality of second openings;

[0078] wherein the orthographic projection of the first opening on the substrate is located within the orthographic projection of the second opening on the substrate;

[0079] In some embodiments, the conductive layer includes a touch layer;

[0080] In some embodiments, the conductive layer includes a conductive portion, and the second light shielding layer is disposed to cover the conductive portion;

[0081] In some embodiments, a distance between an orthographic projection of the conductive portion on the substrate and an orthographic projection of an adjacent second opening on the substrate is D2, and D2 satisfies 0≤D2≤2 μm.

[0082] In some embodiments, the second light shielding layer includes a light shielding portion located between two adjacent second openings, and an orthographic projection of the light shielding portion on the substrate is arranged to overlap with an edge of an orthographic projection of the conductive portion on the substrate;

[0083] In some embodiments, the second light-shielding layer includes a matte material;

[0084] In some embodiments, the second light shielding layer includes blackened metal;

[0085] In some embodiments, the material of the second light shielding layer includes at least one of molybdenum, aluminum, titanium, niobium, tantalum, indium, zinc, and oxides, nitrides, and oxynitrides thereof;

[0086] In some embodiments, the material of the second light shielding layer includes molybdenum niobium oxynitride and indium zinc oxide.

[0087] In some embodiments, the niobium molybdenum oxynitride is located on a surface of the indium zinc oxide facing away from the substrate.

[0088] In some embodiments, it further includes a touch layer disposed between the first light shielding layer and the first electrode layer, wherein the orthographic projection of the touch layer on the substrate is located within the orthographic projection of the first light shielding layer on the substrate;

[0089] In some embodiments, the display panel further includes an organic encapsulation layer located on a side of the second inorganic encapsulation layer facing the substrate, and a first inorganic encapsulation layer located on a side of the organic encapsulation layer facing the substrate;

[0090] The first light shielding layer and the touch control layer are both located between the first inorganic encapsulation layer and the organic encapsulation layer.

[0091] In some embodiments, a cap layer structure is further included between the first light shielding layer and the light-emitting functional layer, wherein the cap layer structure includes a first cap layer, a second cap layer and a low-reflection layer located between the first cap layer and the second cap layer;

[0092] In some embodiments, the distance between the low-reflection layer and the first electrode layer in the thickness direction of the substrate is L1, and L1 satisfies 5nm≤L1≤25nm;

[0093] In some embodiments, the thickness of the low reflection layer is L2, and L2 satisfies: 5nm≤L2≤15nm;

[0094] In some embodiments, the material of the low reflection layer includes a light absorbing material, the absorptivity of the low reflection layer is k, k satisfies: k≥0.5; and / or the refractive index of the low reflection layer is n1, n1 satisfies n1≥1.

[0095] The embodiments of the present application provide a display panel and a display device. A cover layer structure is added in the display panel, which helps to improve the light extraction efficiency of the display panel. On this basis, a low-reflection layer is integrated in the cover layer structure and is disposed on the side of the first cover layer facing the substrate, which helps to reduce the distance between the low-reflection layer and the first electrode layer, thereby achieving a high light extraction efficiency and a low reflectivity of the display panel at the same time, which helps to enhance the use effect and applicable scene range of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0096] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0097] Figure 1 is a schematic cross-sectional structure diagram of a display panel provided in an embodiment of the present application;

[0098] Figure 2a to Figure 2c It is a schematic diagram of an experimental simulation result provided by an embodiment of the present application;

[0099] Figure 3 This is another schematic diagram of experimental simulation results provided by an embodiment of the present application;

[0100] Figure 4 is a schematic diagram of a cross-sectional structure of a display panel in the related art;

[0101] Figure 5 This is another schematic diagram of experimental simulation results provided by an embodiment of the present application;

[0102] Figure 6 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application;

[0103] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure at the middle area Q;

[0104] Figure 8a to Figure 8b This is another schematic diagram of experimental simulation results provided by an embodiment of the present application;

[0105] Fig. 9 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application;

[0106] Fig.10 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application;

[0107] Fig.11 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application;

[0108] Fig.12 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application;

[0109] Fig.13 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application;

[0110] Fig.14 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application;

[0111] Fig.15 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application;

[0112] Fig.16 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application;

[0113] Fig.17is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application;

[0114] Fig.18 It is a structural schematic diagram of a display device provided in an embodiment of the present application.

[0115] Marking Description:

[0116] 100. display panel; 200. display device;

[0117] 10. Substrate;

[0118] 20. Light-emitting functional layer; 21. Light-emitting layer; 211. Light-emitting portion; 22. First electrode layer; 23. Second electrode layer;

[0119] 30. Cover layer structure; 31. First cover layer; 32. Low reflection layer; 33. Second cover layer; 34. Cover layer unit; 341. First cover part; 342. Low reflection part;

[0120] 41, first light shielding layer; 411, first opening; 42, second light shielding layer; 421, second opening; 422, light shielding portion;

[0121] 50, thin film encapsulation layer; 51, first inorganic encapsulation layer; 52, organic encapsulation layer; 53, second inorganic encapsulation layer;

[0122] 60. pixel definition layer; 61. pixel definition portion; 62. pixel opening;

[0123] 70. conductive layer; 71. touch layer;

[0124] 80. Optical layer;

[0125] 90. Isolation structure; 91. Isolation opening;

[0126] 40', black light shielding layer; 80', filter portion; 41', virtual light shielding layer;

[0127] X, thickness direction. DETAILED DESCRIPTION

[0128] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0129] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0130] In a display panel, multiple film layer structures in the display panel have a large reflectivity, resulting in a low contrast problem in the display image in outdoor environments. In some solutions, a film layer structure that can perform an anti-reflection function can be introduced into the display panel. However, this film layer structure has problems such as low light output efficiency.

[0131] In view of this, first of all, please refer to Figure 1 The embodiment of the present application provides a display panel 100, which includes a substrate 10, a light-emitting functional layer 20 and a cover layer structure 30. The light-emitting functional layer 20 is arranged on one side of the substrate 10. The light-emitting functional layer 20 includes a light-emitting layer 21 and a first electrode layer 22 located on the side of the light-emitting layer 21 away from the substrate 10. The cover layer structure 30 is arranged on the side of the light-emitting functional layer 20 away from the substrate 10. The cover layer structure 30 includes a first cover layer 31 and a low-reflection layer 32 located on the side of the first cover layer 31 facing the substrate 10.

[0132] The substrate 10 is a structure used to carry other film layers in the display panel 100. The substrate 10 includes multiple film layer structures. For example, the substrate 10 may include a semiconductor layer, multiple conductor layers, and an insulating layer located between adjacent different conductor layers or between adjacent conductor layers and semiconductor layers. The specific composition of the film layer structure in the substrate 10 is not limited in the embodiment of the present application. Among them, the multiple film layer structures in the substrate 10 and the multiple film layer structures outside the substrate 10 are stacked along the thickness direction X of the substrate 10. The thickness directions X of different film layer structures, the thickness direction X of the display panel 100, and the thickness direction X of the substrate 10 are usually arranged in parallel. Therefore, for ease of understanding, the thickness directions X of different film layer structures, the thickness direction X of the display panel 100, and the thickness direction X of the substrate 10 are all indicated in the same direction in the accompanying drawings.

[0133] The light-emitting functional layer 20 is located on one side of the substrate 10 along the thickness direction X. The light-emitting functional layer 20 is a functional film layer in the display panel 100 for realizing the display effect. The light-emitting functional layer 20 includes multiple film layer structures. The light-emitting layer 21 is a film layer in the light-emitting functional layer 20 that can generate light. The light-emitting layer 21 may include multiple light-emitting portions 211 of different colors. The multiple light-emitting portions 211 are arranged at intervals in the orthographic projection on the substrate 10. At least some of the different light-emitting portions 211 emit light of different colors to realize the colorful display requirements of the display panel 100. Optionally, the multiple light-emitting portions 211 include at least one of a red light-emitting portion 211 for emitting red light, a blue light-emitting portion 211 for emitting blue light, and a green light-emitting portion 211 for emitting green light.

[0134] The first electrode layer 22 is located on the side of the light-emitting layer 21 away from the substrate 10. The first electrode layer 22 may include a plurality of first electrodes arranged corresponding to the plurality of light-emitting portions 211. Different first electrodes may be connected to each other as a whole, or may be arranged at intervals from each other. The embodiment of the present application does not limit this. Optionally, the light-emitting functional layer 20 also includes a second electrode layer 23 located on the side of the light-emitting layer 21 facing the substrate 10. The second electrode layer 23 includes a plurality of second electrodes corresponding to the plurality of light-emitting portions 211 and arranged at intervals from each other. The first electrode and the second electrode cooperate to realize the control of whether the corresponding light-emitting portion 211 emits light or not. Exemplarily, the first electrode is a cathode and the second electrode is an anode.

[0135] In addition to the light-emitting layer 21, the first electrode layer 22 and the second electrode layer 23, the light-emitting functional layer 20 may also include a variety of other film structures. Optionally, the light-emitting functional layer 20 may also include a hole injection layer and a hole transport layer located between the light-emitting layer 21 and the second electrode layer 23, and an electron injection layer and an electron transport layer located between the light-emitting layer 21 and the first electrode layer 22. In addition, the light-emitting functional layer 20 may include only one light-emitting layer 21, or may include multiple light-emitting layers 21. If the light-emitting functional layer 20 includes multiple light-emitting layers 21, a charge generation layer may be provided between adjacent light-emitting layers 21. Among them, the hole injection layer, the hole transport layer, the electron injection layer, the electron transport layer and the charge generation layer may all be common layers with a full-surface structure.

[0136] The cover layer structure 30 is located on the side of the light-emitting functional layer 20 away from the substrate 10 along the thickness direction X. The cover layer structure 30 is an important auxiliary film layer, which is arranged at a position close to the first electrode layer 22. The existence of the cover layer structure 30 can improve the optical properties of the display panel 100, which helps to improve the luminous efficiency while promoting the improvement of the life of the display panel 100.

[0137] The first cover layer 31 is an important component of the cover layer structure 30. The first cover layer 31 can be configured to improve the external emission efficiency of the light-emitting functional layer 20 according to the principle of constructive interference. According to different actual needs, the material in the first cover layer 31 may include organic material, or may also include inorganic material. The specific material composition of the first cover layer 31 is not limited in the embodiments of the present application.

[0138] The low-reflection layer 32 is a film structure including a low-reflectivity material. The presence of the low-reflection layer 32 can reduce the reflectivity of the display panel 100, thereby improving the contrast of the display panel 100 under outdoor lighting scenes. Further, in conjunction with FIG. 2 , it is found through experimental verification that the spacing between the low-reflection layer 32 and the first electrode layer 22 in the thickness direction X has an important influence on the device efficiency and reflectivity.

[0139] Specifically, take the example in which the light-emitting layer 21 includes three light-emitting portions 211 of different colors, namely, a red light-emitting portion 211, a green light-emitting portion 211 and a blue light-emitting portion 211, and the red light-emitting portion 211, the green light-emitting portion 211 and the blue light-emitting portion 211 are correspondingly provided with a low-reflection layer 32 on the side away from the substrate 10. Figure 2a Characterizes the relationship between the distance between the low-reflection layer 32 and the first electrode layer 22 corresponding to the red light-emitting portion 211 and the light extraction efficiency of the red light-emitting portion 211, Figure 2b Characterizes the relationship between the distance between the low reflection layer 32 and the first electrode layer 22 corresponding to the green light emitting portion 211 and the light extraction efficiency of the green light emitting portion 211, Figure 2c Characterizes the relationship between the distance between the low reflection layer 32 and the first electrode layer 22 corresponding to the blue light-emitting portion 211 and the light extraction efficiency of the blue light-emitting portion 211.

[0140] exist Figure 2a to Figure 2c In the figure, the horizontal axis represents the distance between the low-reflection layer 32 and the first electrode layer 22, and the vertical axis represents the current efficiency of the corresponding color light-emitting unit 211. The current efficiency is the ratio of the brightness to the current density passing through the light-emitting unit 211, so the current efficiency is positively correlated with the light extraction efficiency of the light-emitting unit 211. By observing Figure 2a to Figure 2c It can be seen that the distance between the low reflection layer 32 and the first electrode layer 22 is in the range of 10nm-60nm. The larger the distance between the low reflection layer 32 and the first electrode layer 22, the lower the current efficiency of each color light-emitting portion 211, that is, the lower the light extraction efficiency.

[0141] Figure 3Curves 1 / 2 / 3 in the figure respectively represent the relationship between the distance between the low-reflection layer 32 and the first electrode layer 22 corresponding to the blue light-emitting part, the green light-emitting part, and the red light-emitting part, respectively, relative to the brightness reflectivity of the same light source, wherein the horizontal axis represents the distance between the low-reflection layer 32 and the first electrode layer 22, and the vertical axis represents the reflectivity R. By observing Figure 3 It can be seen that as the distance between the low-reflection layer 32 and the first electrode layer 22 changes, the reflectivity of the display panel 100 will also change. Generally speaking, after the distance between the low-reflection layer 32 and the first electrode layer 22 exceeds a certain range, the greater the distance between the low-reflection layer 32 and the first electrode layer 22, the greater the reflectivity corresponding to each color light-emitting portion 211.

[0142] In addition to the above experimental results, the embodiment of the present application also conducted a simulation experiment comparison with the display panel 100 in the related art. Specifically, Figure 4 The cross-sectional structure of a display panel 100 in the related art is shown in FIG. In order to reduce the reflectivity of the display panel 100, a black light shielding layer 40' is provided inside the display panel 100, and there is a large distance between the black light shielding layer 40' and the cathode layer. On this basis, through simulation experiments, Figure 1 and Figure 4 The two display panels 100 are obtained. Figure 5 The hollow dots in the figure represent Figure 4 The simulation results of the display panel 100 are shown in FIG. Figure 1 The display panel 100 shown corresponds to a simulation experiment structure. The abscissa represents the light extraction efficiency I when the display panel emits white light, and the ordinate represents the reflectivity R.

[0143] Further, for different square points, the distance between the corresponding low-reflection layer 32 and the first electrode layer 22 is different, and as the direction of the dotted line with an arrow is pointed, the distance between the low-reflection layer 32 and the first electrode layer 22 corresponding to the square point is larger. Similarly, for different round points, the distance between the corresponding black light-shielding layer and the cathode layer is different, and as the direction of the solid line with an arrow is pointed, the distance between the black light-shielding layer and the cathode layer corresponding to the round point is larger. Exemplarily, in multiple square points, the minimum distance between the corresponding low-reflection layer 32 and the first electrode layer 22 is 0nm and the maximum is 75nm.

[0144] On this basis, it can be seen from the two bold solid lines in the simulation experiment diagram that within a certain range and under the premise of the same white light extraction efficiency, the smaller the distance between the low-reflection layer 32 and the first electrode layer 22, the greater the difference in reflectivity of the display panel 100 provided in the embodiment of the present application compared with the reflectivity of the display panel 100 in the related art. That is, within a certain range, the closer the low-reflection layer 32 is to the first electrode layer 22, the greater the display contrast advantage of the display panel 100 provided in the embodiment of the present application compared with the display panel 100 in the related art.

[0145] It can be seen from the above drawings and text that within a certain distance range, if the low-reflection layer 32 is farther from the first electrode layer 22, the corresponding light extraction efficiency is lower, and the reflectivity of the display panel 100 is greater. In view of this, the embodiment of the present application adjusts the position of the low-reflection layer 32 so that it is located on the side of the first cover layer 31 facing the substrate 10, that is, the low-reflection layer 32 is closer to the first electrode layer 22 relative to the first cover layer 31, so as to help reduce the distance between the low-reflection layer 32 and the first electrode layer 22, while improving the light extraction efficiency of the display panel 100, reducing the reflectivity of the display panel 100, and improving the display perception.

[0146] It should be noted that the capping structure 30 may include only one capping film layer, namely, the first capping layer 31, or may include other capping film layers in addition to the first capping layer 31, and the other capping film layers may include the same material as the first capping layer 31, or may include different materials, as long as the capping film layers can improve the external emission efficiency of the light-emitting functional layer 20 according to the principle of constructive interference. Further, for other capping film layers, the other capping film layers may be located on the side of the low-reflection layer 32 facing the substrate 10, or may be located on the side of the low-reflection layer 32 facing away from the substrate 10, and the embodiment of the present application does not limit this.

[0147] In summary, in the embodiment of the present application, a cover layer structure 30 is added in the display panel 100, which helps to improve the light extraction efficiency of the display panel 100. On this basis, a low-reflection layer 32 is integrated in the cover layer structure 30 and is disposed on the side of the first cover layer 31 facing the substrate 10, which helps to reduce the distance between the low-reflection layer 32 and the first electrode layer 22, thereby achieving a higher light extraction efficiency and lower reflectivity of the display panel 100 at the same time, which helps to enhance the use effect and applicable scene range of the display panel 100.

[0148] In some embodiments, see Figure 6 and Figure 7The distance between the low reflection layer 32 and the first electrode layer 22 in the thickness direction X of the substrate 10 is L1, and L1 satisfies 5nm≤L1≤25nm. Optionally, L1 is one of 5nm, 10nm, 15nm, 20nm and 25nm.

[0149] In the embodiment of the present application, in order to make the display panel 100 have higher light extraction efficiency and lower reflectivity at a plurality of different color light emitting portions 211, the distance L1 between the low-reflection layer 32 and the first substrate 10 is set to be not less than 5nm and not more than 25nm in combination with the experimental results. This can enhance the overall light extraction efficiency of the display panel 100 and reduce the overall reflectivity while reducing the display difference in different color areas, thereby improving the display uniformity of the display panel 100.

[0150] Further optionally, 10nm≤L1≤20nm. This design helps to further reduce the reflectivity of the display panel 100. This result is due to the difference in the optical processes of the reflection of ambient light by the light-emitting portion 211 and the light emitting of the light-emitting portion 211 in the microcavity structure formed by the light-emitting functional layer 20. On this basis, there is an optimal range of 10nm≤L1≤20nm, which optimizes the light output efficiency and reflectivity of the display panel 100.

[0151] In some embodiments, Figure 6 and Figure 7 As shown, the thickness of the low reflection layer 32 is L2, and L2 satisfies: 5nm≤L2≤15nm. The thickness mentioned here refers to the size of the low reflection layer 32 in the thickness direction X. Optionally, L2 is one of 5nm, 7.5nm, 10nm, 12nm and 15nm.

[0152] In the embodiment of the present application, in order to enhance the light extraction efficiency of the display panel 100 and reduce the reflectivity, in addition to reducing the distance L1 between the low-reflection layer 32 and the first electrode layer 22, the thickness of the low-reflection layer 32 can also be limited to be no less than 5 nm and no more than 15 nm, thereby helping to further improve the display effect of the display panel 100 and improve the viewing experience.

[0153] In addition, in order to improve the display performance, the parameters such as the absorptivity and refractive index of the low-reflection layer 32 may also be restricted. In some optional embodiments, the low-reflection layer 32 includes a light-absorbing material, and the absorptivity of the low-reflection layer 32 is k, k satisfies: k≥0.5; and / or the refractive index of the low-reflection layer 32 is n1, n1 satisfies n1≥1. The absorptivity mentioned here represents the absorption capacity of the corresponding low-reflection layer 32 for light.

[0154] In the embodiment of the present application, by setting the low-reflection layer 32 to include a light-absorbing material with an absorptivity of not less than 0.5, the low-reflection layer 32 can absorb more ambient light and reduce the amount of light corresponding to the reflected light, thereby reducing the reflectivity of the display panel 100 and improving the display effect.

[0155] The embodiment of the present application does not limit the material composition of the low-reflection layer 32. Optionally, the material of the low-reflection layer 32 includes at least one of a metal, an alloy, and a metal oxide, or the low-reflection layer 32 may also include a multi-layer metal structure. Further optionally, the material of the low-reflection layer 32 includes at least one of ytterbium, bismuth, cobalt, molybdenum, titanium, zirconium, aluminum, chromium, niobium, platinum, tungsten, indium, tin, iron, nickel, tantalum, manganese, zinc, and germanium.

[0156] In some embodiments, Figure 6 and Figure 7 As shown, the capping layer structure 30 further includes a second capping layer 33 disposed on the side of the low reflection layer 32 facing the substrate 10 .

[0157] In addition to the first cover layer 31, the cover layer structure 30 may further include a second cover layer 33. Similar to the first cover layer 31, the second cover layer 33 is also configured to improve the external emission efficiency of the light-emitting functional layer 20 according to the principle of constructive interference. According to different actual needs, the first cover layer 31 and the second cover layer 33 may include the same material, or may include different materials, which is not limited in the embodiment of the present application.

[0158] In the embodiment of the present application, by arranging a plurality of cover layer films in the cover layer structure 30, the light extraction efficiency of the display panel 100 is further improved by means of the cooperation of the cover layer films such as the first cover layer 31 and the second cover layer 33. At the same time, by arranging the second cover layer 33 on the side of the low-reflection layer 32 facing the substrate 10, the low-reflection layer 32 and the first electrode layer 22 are connected by means of the second cover layer 33, thereby reducing the adverse effect on the display effect caused by the low-reflection layer and the first electrode layer 22 being too close. In addition, the first cover layer 31 and the second cover layer 33 can respectively cover the two opposite surfaces of the low-reflection layer 32 in the thickness direction X, thereby playing a protective effect on the low-reflection layer 32 and improving the reliability of the low-reflection layer 32.

[0159] In addition, through experimental verification, it is found that the positional relationship between the low-reflection layer 32 and the multiple cover film layers in the cover structure 30 also affects the reflectivity of the display panel 100. Figure 8a and Figure 8b The horizontal axis in the figure represents the wavelength W of the light, and the vertical axis represents the reflectivity R of the display panel 100. Figure 8a and Figure 8bCurve 1 in the figure shows the reflectivity of the display panel 100 of the related art shown in the figure under different light emission wavelengths, and curve 2 shows the reflectivity of the display panel 100 under different light emission wavelengths when the low reflection layer 32 is located in the cover layer structure 30 with all the cover layer film layers facing the substrate 10 in the embodiment of the present application. Curve 3 shows the reflectivity of the display panel 100 under different light emission wavelengths when the low reflection layer 32 is located between some of the cover layer film layers in the cover layer structure 30 in the embodiment of the present application.

[0160] By comparing Curve 2 and Curve 3 with Curve 1, it can be seen that no matter the low-reflection layer 32 is located on the side of all the cover film layers in the cover layer structure 30 facing the substrate 10, or is located between two cover film layers, within a specific light emission wavelength range, the reflectivity of the display panel 100 can be made lower than the reflectivity of the display panel 100 in the related art. Further, when the low-reflection layer 32 is located between the two cover film layers, the reflectivity gain of the display panel 100 corresponding to the embodiment of the present application relative to the display panel 100 in the related art can be further increased. In other words, by arranging the low-reflection layer 32 between the two cover film layers, the reflectivity of the display panel 100 can be further reduced, thereby improving the display effect of the display panel 100.

[0161] It should be noted that the capping structure 30 may include other capping film layers in addition to the first capping layer 31 and the second capping layer 33, or may not include other capping film layers. Optionally, the capping structure 30 further includes a third capping layer located on the side of the low-reflection layer 32 facing the substrate 10; and / or, the capping structure 30 further includes a fourth capping layer located on the side of the low-reflection layer 32 facing away from the substrate 10.

[0162] In some optional embodiments, the first cover layer 31 and the second cover layer 33 are made of different materials.

[0163] In the embodiment of the present application, by setting the first cover layer 31 and the second cover layer 33 to include different materials, the first cover layer 31 and the second cover layer 33 can have different parameter ranges in a specific field. For example, the first cover layer 31 and the second cover layer 33 can have different refractive index parameter ranges or absorption rate parameter ranges or reflectivity parameter ranges. In this way, through the mutual cooperation of the first cover layer 31 and the second cover layer 33, further adjustment of the light emitted by the light-emitting portion 211 is achieved, thereby further improving the light extraction efficiency of the display panel 100.

[0164] In some embodiments, the material of the first cap layer 31 includes at least one of an organic material and an inorganic material. Further, according to different actual needs, the material of the first cap layer 31 can have various forms, for example, the first cap layer 31 can include carbocyclic compounds, heterocyclic compounds, amine-containing compounds, porphyrin derivatives, phthalocyanine derivatives, naphthalocyanine derivatives, alkali metal complexes, alkaline earth metal complexes or any combination thereof. Carbocyclic compounds, heterocyclic compounds and amine-containing compounds can be optionally substituted by substituents containing oxygen, nitrogen, sulfur, selenium, silicon, fluorine, chlorine, bromine, iodine or any combination thereof.

[0165] In some embodiments, the capping layer structure 30 further includes a second capping layer 33 disposed on the side of the low-reflection layer 32 facing the substrate 10, wherein the refractive index of the first capping layer 31 is n2, and n2 satisfies n2≥1.6; and / or the refractive index of the second capping layer 33 is n3, and n3 satisfies n3≥1.6. Further optionally, the material of the first capping layer 31 includes an organic material having a refractive index of not less than 1.6, which can be prepared by evaporation.

[0166] In the embodiment of the present application, by setting the refractive index of at least one of the first cover layer 31 and the second cover layer 33 to be not less than 1.6, the light emitted by the light-emitting portion 211 can be effectively adjusted by means of at least one of the first cover layer 31 and the second cover layer 33, thereby improving the light extraction efficiency of the display panel 100 and improving the viewing experience. Further optionally, the refractive indexes of the multiple cover layers in the cover layer structure 30 are all greater than or equal to 1.6, and this design can further improve the light extraction efficiency of the display panel 100.

[0167] In some embodiments, the sum of the thicknesses of the plurality of capping layers in the capping layer structure 30 is L3, and L3 satisfies: 60nm≤L3≤90nm. Optionally, L3 is one of 60nm, 65nm, 70nm, 80nm, and 90nm.

[0168] In the embodiment of the present application, the thickness L3 of the capping film layer in the capping structure 30 is set to be no less than 60 nm, so that the capping structure 30 can have a certain thickness to meet the need for adjusting the light, thereby helping to improve the light extraction efficiency of the display panel 100. At the same time, the thickness L3 is set to be no more than 90 nm, thereby reducing the influence of the existence of the capping structure 30 on the overall thickness of the display panel 100, which helps to design the display panel 100 to be thin and light.

[0169] In some embodiments, see Fig. 9The display panel 100 also includes a first light shielding layer 41 arranged on the side of the cover structure 30 away from the substrate 10, the first light shielding layer 41 is provided with a plurality of first openings 411, the light-emitting layer 21 includes a plurality of light-emitting portions 211, and the orthographic projection of the light-emitting portion 211 on the substrate 10 overlaps with the orthographic projection of the first opening 411 on the substrate 10.

[0170] The first light-shielding layer 41 is a film layer structure including a light-shielding material. The first light-shielding layer 41 is arranged on the side of the cover layer structure 30 facing away from the substrate 10. The existence of the first light-shielding layer 41 can reduce the amount of reflected light reflected away from other film layers in the cover layer structure 30 except the low-reflection layer 32 and the first electrode layer 22, thereby further reducing the reflectivity of the display panel 100 and improving the viewing experience of the display panel 100.

[0171] The first light shielding layer 41 is provided with a plurality of first openings 411, and the orthographic projection of the light-emitting portion 211 on the substrate 10 is overlapped with the orthographic projection of the first opening 411 on the substrate 10, that is, the first opening 411 is arranged corresponding to the light-emitting portion 211, and the light emitted by the light-emitting portion 211 can pass through the first light shielding layer 41 through the first opening 411 to achieve the light-emitting display needs of the display panel 100. The embodiment of the present application does not limit the size and shape of the first opening 411. Optionally, the orthographic projection shape of the first opening 411 on the substrate 10 can match the orthographic projection shape of the light-emitting portion 211 on the substrate 10, for example, the orthographic projection of the first opening 411 and the light-emitting portion 211 on the substrate 10 can both be circular or square.

[0172] In the embodiment of the present application, a first shading layer 41 is provided and the first shading layer 41 is provided on the side of the cover layer structure 30 facing away from the substrate 10, so as to reduce the adverse effects of other film layers in the cover layer structure 30 except the low-reflection layer 32 and the first electrode layer 22 on the reflectivity of the display panel 100, further improve the viewing experience of the display panel 100, and improve the scope of applicable scenarios of the display panel 100.

[0173] Furthermore, considering that in the cover layer structure 30, the reflectivity corresponding to the first cover layer 31 is often greater than the reflectivity of the low-reflection layer 32, the ambient light entering the display panel 100 is more likely to be reflected by the first cover layer 31. On this basis, optionally, the orthographic projection of the first light shielding layer 41 on the substrate 10 is overlapped with the orthographic projection of the first cover layer 31 on the substrate 10, so that the first light shielding layer 41 can reduce the adverse effect on the reflectivity of the display panel 100 caused by the reflection of the ambient light by the first cover layer 31, thereby improving the viewing experience.

[0174] In some embodiments, an orthographic projection of the first opening 411 on the substrate 10 overlaps with an orthographic projection of the low-reflective layer 32 on the substrate 10 .

[0175] In the embodiment of the present application, the first opening 411 is arranged corresponding to the low-reflection layer 32, so that when the display panel 100 is in use, the ambient light that enters the display panel 100 through the first opening 411 can propagate to the low-reflection layer 32. However, since the low-reflection layer 32 has a weak reflective ability to light, a large amount of light propagating to the low-reflection layer 32 cannot be reflected away from the display panel 100, which helps to reduce the reflectivity of the display panel 100 and improve the viewing experience of the display panel 100.

[0176] It should be noted that, according to different actual needs, the display panel 100 may include only the first light shielding layer 41 , or may be provided with other light shielding layers except the first light shielding layer 41 , and the embodiment of the present application is not limited to this.

[0177] In some embodiments, see Fig.10 The display panel 100 further includes a second inorganic encapsulation layer 53 disposed on a side of the cover layer structure 30 facing away from the substrate 10 .

[0178] The second inorganic encapsulation layer 53 is one of the film layers in the panel for realizing the encapsulation function, and the second inorganic encapsulation layer 53 includes an inorganic material. Optionally, the display panel 100 includes a first inorganic encapsulation layer 51, an organic encapsulation layer 52, and a second inorganic encapsulation layer 53, which are located in the cover structure 30 and are sequentially stacked in a direction away from the substrate 10. The first inorganic encapsulation layer 51, the organic encapsulation layer 52, and the second inorganic encapsulation layer 53 together constitute a thin film encapsulation structure, which helps to improve the encapsulation protection effect of the light-emitting functional layer 20.

[0179] In some embodiments, see Fig.10 , the first light shielding layer 41 is located on a side of the second inorganic encapsulation layer 53 facing the substrate 10 .

[0180] The first light shielding layer 41 is located on the side of the second inorganic encapsulation layer 53 facing the substrate 10, that is, the first light shielding layer 41 is arranged closer to the light-emitting functional layer 20 than the second inorganic encapsulation layer 53. Compared with the solution in which the first light shielding layer 41 is arranged on the side of the second inorganic encapsulation layer 53 away from the substrate 10, this design helps to reduce the orthographic projection area of ​​the single first opening 411 on the substrate 10.

[0181] Specifically, combined Fig.10For example, the first light G is the maximum viewing angle light that the light-emitting portion 211 can emit and is allowed to exit the display panel 100, and other light with an inclination angle greater than the first light G will be absorbed by the first light-shielding layer 41. The virtual light-shielding layer 41' is the size and shape of the first light-shielding layer 41 if the first light-shielding layer 41 is located on the side of the second inorganic encapsulation layer 53 away from the substrate 10. In the figure, both the first light-shielding layer 41 and the virtual light-shielding layer 41' can achieve the function of blocking and absorbing other light with an inclination angle greater than the first light G, but because the first light-shielding layer 41 is arranged closer to the light-emitting function layer 20 than the virtual light-shielding layer 41', the orthographic projection area of ​​the first opening 411 located in the first light-shielding layer 41 on the substrate 10 can be smaller than the orthographic projection area of ​​the opening structure in the virtual light-shielding 41' layer on the substrate 10.

[0182] Furthermore, in the embodiment of the present application, since the first opening 411 corresponds to a smaller orthographic projection area, the shading structure in the first shading layer 41 can have a larger orthographic projection area on the substrate 10, thereby increasing the coverage of the first shading layer 41 on the cover layer structure 30 and the first electrode layer 22 without affecting the light emission needs of the light-emitting portion 211, thereby further reducing the adverse effects of at least part of the film layer structure in the cover layer structure 30 and the first electrode layer 22 on the reflectivity of the display panel 100, thereby improving the viewing experience of the display panel 100.

[0183] It should be noted that the first light-shielding layer 41 can be laminated to the surface of the second inorganic encapsulation layer 53 facing the substrate 10, or other film structures can be provided between the first light-shielding layer 41 and the second inorganic encapsulation layer 53, which is not limited in the embodiments of the present application.

[0184] In some embodiments, see Fig.10 and Fig.11 The display panel 100 further includes an organic encapsulation layer 52 located on the side of the second inorganic encapsulation layer 53 facing the substrate 10, and the first light shielding layer 41 is located between the second inorganic encapsulation layer 53 and the organic encapsulation layer 52; or, the first light shielding layer 41 is located between the organic encapsulation layer 52 and the capping structure 30. Further optionally, the display panel 100 further includes a first inorganic encapsulation layer located on the side of the organic encapsulation layer 52 facing the substrate 10, and the first light shielding layer 41 is located on the side of the first inorganic encapsulation layer 51 facing away from the substrate 10; or, the first light shielding layer 41 is located between the first inorganic encapsulation layer 51 and the capping structure 30.

[0185] The embodiment of the present application does not impose too many restrictions on the specific positional relationship of the first light shielding layer 41 relative to the first inorganic encapsulation layer 51, the organic encapsulation layer 52 and the second inorganic encapsulation layer 53. For example, the first light shielding layer 41 is located between the first inorganic encapsulation layer 51 and the organic encapsulation layer 52, which helps to further reduce the distance between the first light shielding layer 41 and the cover layer structure 30, thereby further reducing the orthographic projection area corresponding to the first opening 411, improving the coverage effect of the first light shielding layer 41 on the cover layer structure 30, further reducing the reflectivity of the display panel 100, and improving the display effect. And this design also enables the first light shielding layer 41 and the first electrode layer 22 to be spaced apart in the thickness direction X, thereby reducing the influence of the existence of the first light shielding layer 41 on the performance of the first electrode layer 22.

[0186] In some embodiments, Fig.11 As shown, the distance between the first light shielding layer 41 and the first electrode layer 22 in the thickness direction X of the substrate 10 is L4, and L4 satisfies 0<L4≤3μm. Optionally, L4 is one of 0.1μm, 0.5μm, 1μm, 2μm and 3μm.

[0187] In the embodiment of the present application, by setting the distance L4 between the first light shading layer 41 and the first electrode layer 22 to be no greater than 3 μm, the distance L4 between the first light shading layer 41 and the first electrode layer 22 can be reduced, thereby reducing the orthographic projection area of ​​the first opening 411 on the substrate 10, and increasing the coverage area of ​​the first light shading layer 41 relative to the cover layer structure 30 and the first electrode layer 22. The light shading effect is improved without affecting the light extraction efficiency, thereby further reducing the reflectivity of the display panel 100.

[0188] It should be noted that the thickness of the first inorganic encapsulation layer 51 is provided to be no greater than 2 μm, and may even be no greater than 1 μm. Therefore, in the embodiment of the present application, the first shading layer 41 can still be located between the first inorganic encapsulation layer 51 and the organic encapsulation layer 52, and be arranged in contact with the surface of the first inorganic encapsulation layer 51 facing away from the substrate 10.

[0189] In some embodiments, Fig.11 As shown, the display panel 100 further includes a pixel definition layer 60, the pixel definition layer 60 includes a pixel definition portion 61 and a pixel opening 62 formed by the pixel definition portion 61, and the plurality of light emitting portions 211 are disposed in the plurality of pixel openings 62. The orthographic projection of the pixel opening 62 on the substrate 10 is located within the orthographic projection of the first opening 411 on the substrate 10.

[0190] The pixel definition layer 60 is a film structure used to define the positions of the multiple light-emitting portions 211 in the light-emitting layer 21 in the display panel 100. The pixel definition portion 61 is a physical structure in the pixel definition layer 60, and the pixel opening 62 is an opening structure formed by the enclosing and definition of the pixel definition portion 61. The multiple light-emitting portions 211 are arranged in the multiple pixel openings 62. The orthographic projection shape of the light-emitting portion 211 on the substrate 10 is usually the same as the orthographic projection shape of the pixel opening 62 on the substrate 10, and the orthographic projection area of ​​the light-emitting portion 211 on the substrate 10 is usually positively correlated with the orthographic projection area of ​​the pixel opening 62 on the substrate 10.

[0191] There may be various relationships between the pixel opening 62 and the first opening 411. For example, the orthographic projection of the first opening 411 on the substrate 10 may coincide with the orthographic projection of the pixel opening 62 on the substrate 10, or the orthographic projection of the first opening 411 on the substrate 10 may cover and exceed the orthographic projection of the pixel opening 62 on the substrate 10. The embodiments of the present application are not limited to this, as long as the orthographic projection of the pixel opening 62 on the substrate 10 is within the orthographic projection of the first opening 411 on the substrate 10.

[0192] Furthermore, in the embodiment of the present application, by arranging the pixel opening 62 on the substrate 10 so that the orthographic projection thereof is located within the orthographic projection of the first opening 411 on the substrate 10, the light-emitting portion 211 can be better arranged to correspond to the first opening 411, thereby further reducing the absorption effect of the first shading layer 41 on the light emitted by the light-emitting portion 211 and within a specific viewing angle range, thereby improving the light extraction efficiency of the display panel 100, which has strong practicality.

[0193] In some embodiments, the orthographic projection of the pixel opening 62 on the substrate 10 has a first edge, the orthographic projection of the first opening 411 on the substrate 10 has a second edge, and the distance between the first edge and the second edge is D1, and D1 satisfies 0≤D1≤4μm. Optionally, D1 is one of 0μm, 0.5μm, 1μm, 2μm, and 4μm.

[0194] The first edge is an edge line of the positive projection of the pixel opening 62 on the substrate 10, and the second edge is an edge line of the positive projection of the first opening 411 on the substrate 10, and the first edge and the second edge are arranged adjacent to each other. Among them, the first edge and the second edge can have a variety of shapes, for example, they can include shapes such as straight lines, curves, and broken lines. And the shapes of the first edge and the second edge can be the same, or they can be different, and the distance D1 is the average distance between the first edge and the second edge. Optionally, the first edge and the second edge both include a straight line structure extending along the first direction, and in this case, the distance D1 is the distance between the two straight line structures in the second direction, wherein the first direction and the second direction and the thickness direction X are arranged perpendicular to each other.

[0195] In combination with the above content, it can be known that since the first light shielding layer 41 is closer to the first electrode layer 22, the orthographic projection area of ​​the first opening 411 on the substrate 10 can be reduced without affecting the light-emitting effect of the light-emitting portion 211. On this basis, the embodiment of the present application limits the distance D1 between the first edge and the second edge to be no more than 4 μm, thereby helping to further reduce the orthographic projection area of ​​the first opening 411 on the substrate 10, increase the coverage area of ​​the first light shielding layer 41 for the first electrode layer 22 and the cover layer structure 30, further reduce the reflectivity of the display panel 100, and improve the display effect.

[0196]

[0197] Please refer to Table 1, which shows the corresponding reflectivity gain of the display panel 100 when the distance D1 is equal to 1μm and 4μm respectively, and the low reflection layer 32 is located between different cover layer films in the cover layer structure 30, and the corresponding reflectivity gain of the display panel 100 when the low reflection layer 32 is located in the cover layer structure 30 and all cover layer films are facing the side of the substrate 10.

[0198] By comparing the data in the table, it can be seen that in the embodiment of the present application, whether the low reflection layer 32 is located between different cover film layers in the cover layer structure 30, or is located on the side where all cover film layers in the cover layer structure 30 face the substrate 10, the corresponding reflectivity of the display panel 100 is less than Figure 4 The reflectivity of the display panel 100 in the related art shown. Further, compared with the solution in which the low-reflection layer 32 is located in the cover layer structure 30 on the side where all the cover layer films face the substrate 10, the reflectivity of the display panel 100 corresponding to the technical solution in which the low-reflection layer 32 is located between different cover layer films in the cover layer structure 30 can be 0.3% to 0.4% lower, which can further prove that the technical solution in which the low-reflection layer 32 is located between different cover layer films in the cover layer structure 30 is helpful to further reduce the overall reflectivity of the display panel 100.

[0199] In some embodiments, the pixel defining portion 61 includes a light shielding material, that is, the pixel defining portion 61 can absorb light. Depending on actual needs, the pixel defining portion 61 can include the same material as the first light shielding layer 41, or both can include different light shielding materials. The specific material composition of the pixel defining portion 61 is not limited in the embodiment of the present application. Optionally, the material of the pixel defining portion 61 includes carbon black.

[0200] In the embodiment of the present application, the pixel defining portion 61 is provided with a light shielding material, so that the pixel defining portion 61 can shield part of the signal wiring or device structure in the substrate 10, thereby reducing the reflection problem caused by some structures in the substrate 10 and reducing the overall reflectivity of the display panel 100. At the same time, part of the wide viewing angle light emitted by the light-emitting portion 211 can also be absorbed or shielded by the pixel defining portion 61, so that the mixing effect between the wide viewing angle light emitted by different light-emitting portions 211 can be reduced, the degree of light mixing of the display panel 100 can be reduced, and the display effect can be improved.

[0201] In some embodiments, see Fig.12 The display panel 100 also includes a conductive layer 70 arranged on the side of the first light-shielding layer 41 facing away from the substrate 10, and a second light-shielding layer 42 located on the side of the conductive layer 70 facing away from the substrate 10, and the second light-shielding layer 42 is provided with a plurality of second openings 421, wherein the orthographic projection of the first opening 411 on the substrate 10 is located within the orthographic projection of the second opening 421 on the substrate 10.

[0202] The conductive layer 70 is a film structure including a conductor or semiconductor structure in the display panel 100 and located on the side of the first electrode layer 22 away from the substrate 10. According to different actual needs, the conductive layer 70 can be located on the side of the first light shielding layer 41 away from the substrate 10, and further, the conductive layer 70 can be located on the side of the second inorganic encapsulation layer 53 away from the substrate 10. The specific functional effect of the conductive layer 70 is not limited in the embodiment of the present application. Optionally, the conductive layer 70 includes a touch layer 71, that is, the conductive layer 70 is a film structure in the display panel 100 that can realize the touch function.

[0203] In view of the situation where the conductive layer 70 is located on the side of the first shading layer 41 away from the substrate 10, since the first shading layer 41 cannot cover the conductive layer 70, and the material structure within the conductive layer 70 will also reflect the ambient light, in order to reduce the influence of the conductive layer 70 on the reflectivity of the display panel 100, the embodiment of the present application also provides a second shading layer 42 on the side of the conductive layer 70 away from the substrate 10. The second shading layer 42 can cover the conductive layer 70, thereby reducing the possibility of ambient light propagating to the surface of the conductive layer 70 away from the substrate 10, thereby reducing the adverse effect of the conductive layer 70 on the reflectivity of the display panel 100.

[0204] The embodiment of the present application does not limit the material composition of the second light-shielding layer 42. The material in the second light-shielding layer 42 can be the same as the material in the first light-shielding layer 41, or the materials of the two can also be different, as long as the first light-shielding layer 41 and the second light-shielding layer 42 can meet the needs of absorbing or blocking light.

[0205] The second opening 421 is an opening structure in the second light-shielding layer 42 for allowing light to pass through. Similar to the first opening 411, the second opening 421 is also arranged corresponding to the light-emitting portion 211, but the difference is that the orthographic projection area of ​​the second opening 421 on the substrate 10 can be designed to be larger than the orthographic projection area of ​​the first opening 411 on the substrate 10, so that the orthographic projection of the first opening 411 on the substrate 10 is located within the orthographic projection of the second opening 421 on the substrate 10.

[0206] Specifically, in combination with the foregoing content, it can be known that the existence of the first shading layer 41 allows the light within a partial tilt angle range emitted by the light-emitting portion 211 to be emitted from the display panel 100, while the light within other larger tilt angle ranges emitted by the light-emitting portion 211 will be absorbed or blocked by the first shading layer 41, thereby reducing the risk of color mixing of light emitted by different light-emitting portions 211 and improving display accuracy.

[0207] On this basis, since the first light shielding layer 41 can satisfy the absorption or shielding effect of the light emitted by the light-emitting portion 211 at a relatively large tilt angle, the design of the second light shielding layer 42 is no longer limited to absorbing or shielding the light emitted by the light-emitting portion 211 at a relatively large tilt angle. Further, the orthographic projection area of ​​the second light shielding layer 42 on the substrate 10 can be adaptively reduced, as long as the second light shielding layer 42 can cover the conductive layer 70. Optionally, the conductive layer 70 includes a conductive portion, and the orthographic projection of the conductive portion on the substrate 10 is located within the orthographic projection of the second light shielding layer 42 on the substrate 10.

[0208] In summary, in the embodiment of the present application, since the design of the second light-shielding layer 42 is no longer limited to absorbing or shielding light emitted by the light-emitting portion 211 at a larger inclined angle, its orthographic projection area on the substrate 10 can be appropriately reduced, so that the orthographic projection of the first opening 411 on the substrate 10 is located within the orthographic projection of the second opening 421 on the substrate 10. This reduces the reflection of the conductive layer 70 while reducing the influence of the second light-shielding layer 42 on the light-emitting effect of the light-emitting portion 211, thereby improving the viewing experience of the display panel 100.

[0209] In some embodiments, Fig.12 As shown, the distance between the orthographic projection of the conductive portion on the substrate 10 and the orthographic projection of the adjacent second opening 421 on the substrate 10 is D2, and D2 satisfies 0≤D2≤2μm. Optionally, D2 is one of 0, 0.5μm, 1μm, 1.5μm and 2μm.

[0210] In the embodiment of the present application, since the second light shielding layer 42 can only shield the conductive layer 70 without blocking the light-emitting effect of the light-emitting portion 211, the shape and size of the second light shielding layer 42 and the conductive layer 70 can be further matched and designed, so that the distance D2 between the orthographic projection of the conductive portion on the substrate 10 and the orthographic projection of the adjacent second opening 421 on the substrate 10 can be reduced to no more than 2μm, thereby reducing the impact of the second light shielding layer 42 on the light-emitting effect of the light-emitting portion 211 and improving the viewing experience of the display panel 100. At the same time, the distance D2 is set to be not less than 0, so that the second light shielding layer 42 can completely cover the conductive layer 70, thereby reducing the possibility of reflection of ambient light at the conductive layer 70 and reducing the overall reflectivity of the display panel 100.

[0211] In some embodiments, see Fig.13 The second shading layer 42 includes a shading portion 422 located between two adjacent second openings 421, and the orthographic projection of the shading portion 422 on the substrate 10 is arranged to coincide with the edge of the orthographic projection of the conductive portion on the substrate 10, that is, the distance D2 between the orthographic projection of the conductive portion on the substrate 10 and the orthographic projection of the adjacent second opening 421 on the substrate 10 is equal to 0.

[0212] The light shielding portion 422 is a structure located between adjacent second openings 421 in the light shielding layer and includes a light shielding material, wherein a plurality of light shielding portions 422 located between different adjacent second openings 421 may be connected to each other. Optionally, the orthographic projection of the light shielding portion 422 on the substrate 10 may be a mesh structure.

[0213] In the embodiment of the present application, the size of the second shading layer 42 is further limited in design so that the orthographic projection of the shading portion 422 on the substrate 10 is arranged to coincide with the edge of the orthographic projection of the conductive portion on the substrate 10. In this way, while satisfying the requirement that the shading layer covers and blocks the conductive layer 70 to reduce the adverse effect of the conductive layer 70 on the reflectivity of the display panel 100, the size of the shading portion 422 in the second shading layer 42 can be further reduced, thereby reducing the influence of the second shading layer 42 on the luminous effect of the luminous portion 211, and improving the viewing experience of the display panel 100.

[0214] In some embodiments, the second light shielding layer 42 includes a matte material. The matte material is a special chemical material set on the surface of an object. The presence of the matte material can reduce the reflected light on the surface of the object, reduce the brightness, and present a dull effect.

[0215] In the embodiment of the present application, by providing the second shading layer 42 with a matte material, the second shading layer 42 can absorb or block light, and the presence of the matte material can also allow some other light-transmitting or light-reflecting materials to be optionally provided in the second shading layer 42, thereby increasing the diversity of material choices in the second shading layer 42 and helping to reduce preparation costs.

[0216] In some embodiments, the second light shielding layer 42 includes blackened metal, which refers to a metal material that has been subjected to a blackening treatment, wherein the blackening treatment refers to forming a black film on the metal surface by a chemical or physical method.

[0217] In the embodiment of the present application, both the conductive layer 70 and the second light shielding layer 42 may include metal materials. On this basis, the second light shielding layer 42 may be formed by etching together with the conductive layer 70, so that the second light shielding layer 42 covers the conductive layer 70 and the orthographic projection area of ​​the second light shielding layer 42 on the substrate 10 is reduced, thereby improving the viewing experience of the display panel 100. At the same time, under this design, the conductive layer 70 and the second light shielding layer 42 may meet the etching needs of both through a sacrificial layer, thereby eliminating a sacrificial layer, simplifying the yellow light process, reducing the preparation cost and improving the preparation efficiency.

[0218] In some embodiments, the material of the second light shielding layer 42 includes at least one of molybdenum, aluminum, titanium, niobium, tantalum, indium, zinc, and oxides, nitrides, and oxynitrides thereof.

[0219] Optionally, when the second light shielding layer 42 includes a blackened metal, the blackened metal may include a stacked structure of molybdenum oxide, molybdenum and molybdenum oxide, or may include a stacked structure of aluminum oxide, aluminum and aluminum oxide, or may include a stacked structure of molybdenum oxide, titanium and molybdenum oxide, and utilize the coherence and destructive effects between different film layers to reduce interference light and improve the contrast of the display panel 100. Alternatively, the second light shielding layer 42 may also include indium zinc oxide and molybdenum niobium oxynitride (MoNbOxNy; Mo is molybdenum metal, Nb is niobium metal, x and y are integers or decimals), and further optionally, molybdenum niobium oxynitride is located on the surface of indium zinc oxide away from the substrate 10. Among them, molybdenum niobium oxynitride is a matte material, and molybdenum niobium oxynitride can absorb or block light incident on the surface of indium zinc oxide.

[0220] In some embodiments, see Fig.14 The display panel 100 also includes a first inorganic encapsulation layer 51 disposed between the first light-shielding layer 41 and the first electrode layer 22, and a touch layer 71 disposed between the first light-shielding layer 41 and the first inorganic encapsulation layer 51, and the orthographic projection of the touch layer 71 on the substrate 10 is located within the orthographic projection of the first light-shielding layer 41 on the substrate 10.

[0221] By comparison with the above content, the touch layer 71 can be located on the side of the first light shielding layer 41 facing away from the substrate 10, in addition to being located on the side of the first light shielding layer 41 facing the substrate 10. In this case, the first light shielding layer 41 can cover and shield the touch layer 71, and under this design, the display panel 100 may not be provided with the second light shielding layer 42 on the side of the first light shielding layer 41 facing away from the substrate 10. Of course, in other embodiments, the second light shielding layer 42 may be provided on the side of the first light shielding layer 41 facing away from the substrate 10, and the second light shielding layer 42 is used to cover and shield other conductive film layers except the touch layer 71.

[0222] Furthermore, in order to meet the covering and shielding effect of the touch layer 71, the embodiment of the present application sets the orthographic projection of the touch layer 71 on the substrate 10 to be located within the orthographic projection of the first shading layer 41 on the substrate 10. At the same time, considering that the touch layer 71 and the first electrode layer 22 both include conductive materials and the signals transmitted therein are not the same, the embodiment of the present application also sets the first inorganic encapsulation layer 51 between the touch layer 71 and the first electrode layer 22, so as to improve the reliability of signal transmission between the touch layer 71 and the first electrode layer 22.

[0223] In summary, in the embodiment of the present application, by adjusting the film layer position of the touch layer 71, it is located on the side of the first light-shielding layer 41 facing the substrate 10, and the orthographic projection of the touch layer 71 on the substrate 10 is set to be located within the orthographic projection of the first light-shielding layer 41 on the substrate 10, so that the first light-shielding layer 41 can also play a covering and shielding role for the touch layer 71, thereby selectively canceling the setting of other light-shielding film layers above the first light-shielding layer 41, reducing the overall thickness of the display panel 100 and improving the feel of use.

[0224] It should be noted that the embodiment of the present application does not limit the positional relationship of the touch layer 71 relative to the organic encapsulation layer 52 and the second inorganic encapsulation layer 53, as long as the touch layer 71 is located on the side of the first light shielding layer 41 facing the substrate 10. In some embodiments, the display panel 100 further includes an organic encapsulation layer 52 disposed on the side of the first inorganic encapsulation layer 51 facing away from the substrate 10, and a second inorganic encapsulation layer 53 located on the side of the organic encapsulation layer 52 facing away from the substrate 10, and the first light shielding layer 41 and the touch layer 71 are both located between the first inorganic encapsulation layer 51 and the organic encapsulation layer 52.

[0225] In some embodiments, see Fig.15 The display panel 100 further includes an optical layer 80 disposed on the side of the cover structure 30 away from the substrate 10, and the optical layer 80 is configured to absorb light of a specific wavelength band. The light-emitting layer 21 includes a plurality of light-emitting portions 211, and the orthographic projection of the optical layer 80 on the substrate 10 covers the orthographic projection of the plurality of light-emitting portions 211 on the substrate 10.

[0226] The optical layer 80 is a film structure disposed on the light-emitting layer 21 for absorbing light of a specific wavelength band to filter the emitted light. The specific material composition of the optical layer 80 is not limited in the embodiments of the present application. In some optional embodiments, the material of the optical layer 80 includes at least one of a dye and a pigment. Further, for the case where the multiple light-emitting portions 211 include a red light-emitting portion 211, a green light-emitting portion 211, and a blue light-emitting portion 211, the optical layer 80 may contain a dye or pigment that absorbs the wavelength band between green light and blue light and / or absorbs ambient light in the wavelength band between green light and red light.

[0227] Further optionally, the material of the optical layer 80 includes at least one of subphthalocyanine and copper phthalocyanine. Subphthalocyanine and copper phthalocyanine are both dyes or pigments, and by providing subphthalocyanine and copper phthalocyanine in the optical layer 80, the reflectivity of the optical layer 80 can be reduced while the other film structures of the optical layer 80 facing the substrate 10 and being bonded can be filled to improve the flatness.

[0228] In related technologies, such as Figure 4 As shown, the display panel 100 is usually provided with a filter layer, and the filter layer includes filter parts 80' corresponding to different light-emitting parts 211, and at least some of the different filter parts 80' are prepared and formed in different processes. However, in the embodiment of the present application, due to the existence of the optical layer 80, a single optical layer 80 can filter the light of different colors emitted by multiple light-emitting parts 211, so that the orthographic projection of the optical layer 80 on the substrate 10 can cover the orthographic projection of multiple light-emitting parts 211 on the substrate 10, that is, the optical layer 80 does not need to be independently designed for multiple light-emitting parts 211, but is a continuous film layer structure that regulates the light emitted by multiple different light-emitting parts 211. This helps to reduce and simplify the process steps at the optical layer 80 and improve the preparation efficiency.

[0229] In some optional embodiments, the optical layer 80 has a planar structure, so that the orthographic projection of the optical layer 80 with a planar structure on the substrate 10 can cover the orthographic projection of all the light-emitting parts 211 on the substrate 10, thereby helping to further simplify the process of the optical layer 80 and improve the preparation efficiency.

[0230] In addition, the embodiment of the present application does not limit the specific position relationship of the optical layer 80, as long as the optical layer 80 is arranged on the light-emitting side of the light-emitting layer 21. Optionally, the display panel 100 further includes a thin film encapsulation layer 50 arranged on the side of the cover layer structure 30 away from the substrate 10, and a second light shielding layer 42 arranged on the side of the thin film encapsulation layer 50 away from the substrate 10, and the second light shielding layer 42 is provided with a plurality of second openings 421; wherein the optical layer 80 is partially located on the side of the second light shielding layer 42 away from the substrate 10, and partially located at the second openings 421.

[0231] The thin film encapsulation layer 50 is a laminated structure including a first inorganic encapsulation layer 51, a second inorganic encapsulation layer 53 and an organic encapsulation layer 52 and is used for encapsulation. The second light-shielding layer 42 is located on the side of the thin film encapsulation layer 50 away from the substrate 10 and is provided with a plurality of second openings 421 to meet the emission needs of the light corresponding to the plurality of light-emitting parts 211. On this basis, by partially locating the optical layer 80 on the side of the second light-shielding layer 42 away from the substrate 10 and partially located at the second opening 421, the optical layer 80 can not only satisfy the filtering and regulating function of the light, but also play a role in filling the film layer where the second light-shielding layer 42 is located, thereby improving the flatness and reducing the difficulty of forming or bonding the subsequent film layer structure.

[0232] In some embodiments, see Fig.16 The display panel 100 also includes an isolation structure 90 arranged on one side of the substrate 10, the isolation structure 90 encloses a plurality of isolation openings 91, the light-emitting functional layer 20 includes a light-emitting portion 211 arranged corresponding to the isolation openings 91, and the cover layer structure 30 includes a cover layer unit 34 arranged corresponding to the isolation openings 91.

[0233] The light-emitting functional layer 20 and the isolation structure 90 are located on the same side of the substrate 10, and the light-emitting layer 21 in the light-emitting functional layer 20 includes a light-emitting portion 211 arranged corresponding to the isolation opening 91. The "light-emitting portion 211 is arranged corresponding to the isolation opening 91" mentioned here means that the orthographic projection of the light-emitting portion 211 on the substrate 10 is at least partially located within the orthographic projection of the isolation opening 91 on the substrate 10. Among them, the light-emitting portion 211 can be at least partially located in the isolation opening 91, or it can also be at least partially located on the side of the isolation opening 91 facing the substrate 10, and the embodiment of the present application is not limited to this. Furthermore, the cover layer structure 30 also includes a cover layer unit 34 arranged corresponding to the isolation opening 91. The "cover layer unit 34 is arranged corresponding to the isolation opening 91" mentioned here is the same as the above content, and the embodiment of the present application will not be repeated.

[0234] The embodiments of the present application do not limit the related structures and other related contents of the isolation structure 90. Among them, patents PCT / CN2023 / 134518, 202310759370.2, 202311117143.6, 202311499823.9, 202310707209.0, 202311346196.5, 202310692671.8, and 202310909421.5 record related schemes such as the isolation structure 90, and their contents are incorporated into the present application by reference for reference, and will not be repeated in this embodiment.

[0235] In the embodiment of the present application, the isolation structure 90 encloses a plurality of isolation openings 91. The setting of the isolation structure 90 enables the light-emitting functional layer 20 and the cover layer structure 30 to respectively form a plurality of spaced-apart light-emitting portions 211 and a cover layer unit 34 without the need for a fine metal mask plate, thereby reducing the preparation cost of the display panel 100.

[0236] Specifically, taking the preparation of the red light-emitting portion 211 before the green light-emitting portion 211 as an example, since the precision metal mask is cancelled, the red light-emitting material corresponding to the red light-emitting portion 211 and the covering material corresponding to the covering structure 30 will first fall into each isolation opening 91, and then the red light-emitting material and the covering material in part of the isolation openings 91 are selectively etched away, and the red light-emitting material and the covering material in part of the isolation openings 91 are retained to form the red light-emitting portion 211 and the covering unit 34 corresponding to the red light-emitting portion 211.

[0237] After that, the green light-emitting material corresponding to the green light-emitting portion 211 and the capping material corresponding to the capping structure 30 will fall into each isolation opening 91, and then the green light-emitting material and the capping material in part of the isolation opening 91 are selectively etched away, and the green light-emitting material and the light extraction material in part of the isolation opening 91 are retained to form the green light-emitting portion 211 and the capping unit 34 corresponding to the green light-emitting portion 211. Therefore, under this design, the preparation of the light-emitting functional layer 20 and the capping structure 30 can be realized without the need for a fine metal mask, thereby reducing the preparation cost of the display panel 100.

[0238] The present embodiment does not limit the specific material composition of the cover layer structure 30. Optionally, the material of the cover layer unit 34 includes at least one of a dye and a pigment. Further optionally, the material of the cover layer unit 34 includes at least one of subphthalocyanine and copper phthalocyanine.

[0239] In addition, since the capping units 34 corresponding to the light-emitting parts 211 of different colors are sequentially prepared in different processes, there is no necessary connection between the sizes and material compositions of the film structures of different capping units 34 .

[0240] In view of this, if Fig.16 As shown, in some embodiments, the first cover layer 31 includes first cover portions 341 in the cover layer unit 34, and at least some of the first cover portions 341 have different materials; and / or at least some of the first cover portions 341 have different thicknesses.

[0241] The first cover portion 341 is a partial structure of the first cover layer 31 located in the cover layer unit 34. Since different cover layer units 34 can be independently prepared and formed, different first cover portions 341 will also be prepared and formed in different processes. On this basis, in the embodiment of the present application, the thickness dimensions of different first cover portions 341 are set differently or the material composition of different first cover portions 341 are set differently according to the different colors of light emitted by different light-emitting portions 211, so that different first cover portions 341 can match the adjustment needs of different light-emitting portions 211 corresponding to different colors of light, thereby helping to improve the display effect of the display panel 100.

[0242] Similarly, in some embodiments, the low-reflection layer 32 includes a low-reflection portion 342 located in the cover layer unit 34, and at least some of the low-reflection portions 342 are made of different materials; and / or at least some of the low-reflection portions 342 are made of different thicknesses. In this way, different low-reflection portions 342 can match the light reflection requirements of the display panel 100 in different areas, thereby helping to improve the display effect of the display panel 100.

[0243] Second, see Fig.17 The embodiment of the present application provides a display panel 100, which includes a substrate 10, a light-emitting functional layer 20, a first light-shielding layer 41, and a second inorganic encapsulation layer 53. The light-emitting functional layer 20 is disposed on one side of the substrate 10. The light-emitting functional layer 20 includes a light-emitting layer 21 and a first electrode layer 22 located on the side of the light-emitting layer 21 away from the substrate 10. The light-emitting layer 21 includes a plurality of light-emitting portions 211. The first light-shielding layer 41 is disposed on the side of the light-emitting functional layer 20 away from the substrate 10. The first light-shielding layer 41 is provided with a plurality of first openings 411. The orthographic projection of the light-emitting portion 211 on the substrate 10 overlaps with the orthographic projection of the first opening 411 on the substrate 10. The second inorganic encapsulation layer 53 is disposed on the side of the first light-shielding layer 41 away from the substrate 10.

[0244] The substrate 10 is a structure used to carry other film layers in the display panel 100. The substrate 10 includes multiple film layer structures. For example, the substrate 10 may include a semiconductor layer, multiple conductor layers, and an insulating layer located between adjacent different conductor layers or between adjacent conductor layers and semiconductor layers. The specific composition of the film layer structure in the substrate 10 is not limited in the embodiment of the present application. Among them, the multiple film layer structures in the substrate 10 and the multiple film layer structures outside the substrate 10 are stacked along the thickness direction X of the substrate 10. The thickness directions X of different film layer structures, the thickness direction X of the display panel 100, and the thickness direction X of the substrate 10 are usually arranged in parallel. Therefore, for ease of understanding, the thickness directions X of different film layer structures, the thickness direction X of the display panel 100, and the thickness direction X of the substrate 10 are all indicated in the same direction in the accompanying drawings.

[0245] The light-emitting functional layer 20 is located on one side of the substrate 10 along the thickness direction X. The light-emitting functional layer 20 is a functional film layer in the display panel 100 for realizing the display effect. The light-emitting functional layer 20 includes multiple film layer structures. The light-emitting layer 21 is a film layer in the light-emitting functional layer 20 that can generate light. The light-emitting layer 21 may include multiple light-emitting portions 211 of different colors. The multiple light-emitting portions 211 are arranged at intervals in the orthographic projection on the substrate 10. At least some of the different light-emitting portions 211 emit light of different colors to realize the colorful display requirements of the display panel 100. Optionally, the multiple light-emitting portions 211 include at least one of a red light-emitting portion 211 for emitting red light, a blue light-emitting portion 211 for emitting blue light, and a green light-emitting portion 211 for emitting green light.

[0246] The first electrode layer 22 is located on the side of the light-emitting layer 21 away from the substrate 10. The first electrode layer 22 may include a plurality of first electrodes arranged corresponding to the plurality of light-emitting portions 211. Different first electrodes may be connected to each other as a whole, or may be arranged at intervals from each other. The embodiment of the present application does not limit this. Optionally, the light-emitting functional layer 20 also includes a second electrode layer located on the side of the light-emitting layer 21 facing the substrate 10. The second electrode layer includes a plurality of second electrodes corresponding to the plurality of light-emitting portions 211 and arranged at intervals from each other. The first electrode and the second electrode cooperate to realize the control of whether the corresponding light-emitting portion 211 emits light or not. Exemplarily, the first electrode is a cathode and the second electrode is an anode.

[0247] In addition to the light-emitting layer 21, the first electrode layer 22 and the second electrode layer 23, the light-emitting functional layer 20 may also include a variety of other film structures. Optionally, the light-emitting functional layer 20 may also include a hole injection layer and a hole transport layer located between the light-emitting layer 21 and the second electrode layer 23, and an electron injection layer and an electron transport layer located between the light-emitting layer 21 and the first electrode layer 22. In addition, the light-emitting functional layer 20 may include only one light-emitting layer 21, or may include multiple light-emitting layers 21. If the light-emitting functional layer 20 includes multiple light-emitting layers 21, a charge generation layer may be provided between adjacent light-emitting layers 21. Among them, the hole injection layer, the hole transport layer, the electron injection layer, the electron transport layer and the charge generation layer may all be common layers with a full-surface structure.

[0248] The first light-shielding layer 41 is a film layer structure including a light-shielding material in the display panel 100. The first light-shielding layer 41 is arranged on the side of the light-emitting functional layer 20 away from the substrate 10. The existence of the first light-shielding layer 41 can reduce the amount of reflected light reflected away through the first electrode layer 22, etc., thereby further reducing the reflectivity of the display panel 100 and improving the viewing experience of the display panel 100.

[0249] The first light-shielding layer 41 is provided with a plurality of first openings 411, and the orthographic projection of the light-emitting portion 211 on the substrate 10 is overlapped with the orthographic projection of the first opening 411 on the substrate 10, that is, the first opening 411 is arranged corresponding to the light-emitting portion 211, and the light emitted by the light-emitting portion 211 can pass through the first light-shielding layer 41 through the first opening 411 to achieve the light-emitting display needs of the display panel 100. The embodiment of the present application does not limit the size and shape of the first opening 411. Optionally, the orthographic projection shape of the first opening 411 on the substrate 10 can match the orthographic projection shape of the light-emitting portion 211 on the substrate 10, for example, the first opening 411 and the orthographic projection of the light-emitting portion 211 on the substrate 10 can both be circular or square.

[0250] The second inorganic encapsulation layer 53 is one of the film layers in the panel for realizing the encapsulation function, and the second inorganic encapsulation layer 53 includes an inorganic material. Optionally, the display panel 100 includes a first inorganic encapsulation layer 51, an organic encapsulation layer 52, and a second inorganic encapsulation layer 53, which are located on one side of the first electrode layer 22 and are sequentially stacked in a direction away from the substrate 10. The first inorganic encapsulation layer 51, the organic encapsulation layer 52, and the second inorganic encapsulation layer 53 together constitute a thin film encapsulation structure, which helps to improve the encapsulation protection effect of the light-emitting functional layer 20.

[0251] The first light shielding layer 41 is located on the side of the second inorganic encapsulation layer 53 facing the substrate 10, that is, the first light shielding layer 41 is arranged closer to the light-emitting functional layer 20 than the second inorganic encapsulation layer 53. Compared with the solution in which the first light shielding layer 41 is arranged on the side of the second inorganic encapsulation layer 53 away from the substrate 10, this design helps to reduce the orthographic projection area of ​​the single first opening 411 on the substrate 10.

[0252] Furthermore, in the embodiment of the present application, since the first opening 411 corresponds to a smaller orthographic projection area, the shading structure in the first shading layer 41 can have a larger orthographic projection area on the substrate 10. Therefore, without affecting the light emitting needs of the light-emitting portion 211, the coverage of the first shading layer 41 on the first electrode layer 22 can be improved, thereby reducing the adverse effect of the first electrode layer 22 on the reflectivity of the display panel 100 and improving the viewing experience of the display panel 100.

[0253] It should be noted that the first light-shielding layer 41 can be laminated to the surface of the second inorganic encapsulation layer 53 facing the substrate 10, or other film structures can be provided between the first light-shielding layer 41 and the second inorganic encapsulation layer 53, which is not limited in the embodiments of the present application.

[0254] In some embodiments, the display panel 100 further includes an organic encapsulation layer 52 located on the side of the second inorganic encapsulation layer 53 facing the substrate 10, and the first light shielding layer 41 is located between the second inorganic encapsulation layer 53 and the organic encapsulation layer 52; or, the first light shielding layer 41 is located between the organic encapsulation layer 52 and the first electrode layer 22. Further optionally, the display panel 100 further includes a first inorganic encapsulation layer 51 located on the side of the organic encapsulation layer 52 facing the substrate 10, and the first light shielding layer 41 is located on the side of the first inorganic encapsulation layer 51 facing away from the substrate 10; or, the first light shielding layer 41 is located between the first inorganic encapsulation layer 51 and the first electrode layer 22.

[0255] The embodiment of the present application does not impose too many restrictions on the specific positional relationship of the first light shielding layer 41 relative to the first inorganic encapsulation layer 51, the organic encapsulation layer 52 and the second inorganic encapsulation layer 53. For example, the first light shielding layer 41 is located between the first inorganic encapsulation layer 51 and the organic encapsulation layer 52, which helps to further reduce the distance between the first light shielding layer 41 and the first electrode layer 22, thereby further reducing the orthographic projection area corresponding to the first opening 411, improving the coverage effect of the first light shielding layer 41 on the first electrode layer 22, further reducing the reflectivity of the display panel 100, and improving the display effect. And this design also enables the first light shielding layer 41 and the first electrode layer 22 to be spaced apart in the thickness direction X, thereby reducing the influence of the existence of the first light shielding layer 41 on the performance of the first electrode layer 22.

[0256] In some embodiments, the distance between the first light shielding layer 41 and the first electrode layer 22 in the thickness direction X of the substrate 10 is L4, and L4 satisfies 0<L4≤3μm. Optionally, L4 is one of 0.1μm, 0.5μm, 1μm, 2μm and 3μm.

[0257] In the embodiment of the present application, by setting the distance L4 between the first light shading layer 41 and the first electrode layer 22 to be no greater than 3 μm, the distance L4 between the first light shading layer 41 and the first electrode layer 22 can be reduced, thereby reducing the orthographic projection area of ​​the first opening 411 on the substrate 10, and increasing the coverage area of ​​the first light shading layer 41 relative to the first electrode layer 22. The light shading effect is improved without affecting the light extraction efficiency, thereby further reducing the reflectivity of the display panel 100.

[0258] It should be noted that the thickness of the first inorganic encapsulation layer 51 is provided to be no greater than 2 μm, and may even be no greater than 1 μm. Therefore, in the embodiment of the present application, the first shading layer 41 can still be located between the first inorganic encapsulation layer 51 and the organic encapsulation layer 52, and be arranged in contact with the surface of the first inorganic encapsulation layer 51 facing away from the substrate 10.

[0259] In some embodiments, the display panel 100 further includes a pixel definition layer 60, the pixel definition layer 60 includes a pixel definition portion 61 and a pixel opening 62 formed by the pixel definition portion 61, and the plurality of light emitting portions 211 are disposed in the plurality of pixel openings 62. The orthographic projection of the pixel opening 62 on the substrate 10 is located within the orthographic projection of the first opening 411 on the substrate 10.

[0260] The pixel definition layer 60 is a film structure used to define the positions of the multiple light-emitting portions 211 in the light-emitting layer 21 in the display panel 100. The pixel definition portion 61 is a physical structure in the pixel definition layer 60, and the pixel opening 62 is an opening structure formed by the enclosing and definition of the pixel definition portion 61. The multiple light-emitting portions 211 are arranged in the multiple pixel openings 62. The orthographic projection shape of the light-emitting portion 211 on the substrate 10 is usually the same as the orthographic projection shape of the pixel opening 62 on the substrate 10, and the orthographic projection area of ​​the light-emitting portion 211 on the substrate 10 is usually positively correlated with the orthographic projection area of ​​the pixel opening 62 on the substrate 10.

[0261] There may be various relationships between the pixel opening 62 and the first opening 411. For example, the orthographic projection of the first opening 411 on the substrate 10 may coincide with the orthographic projection of the pixel opening 62 on the substrate 10, or the orthographic projection of the first opening 411 on the substrate 10 may cover and exceed the orthographic projection of the pixel opening 62 on the substrate 10. The embodiments of the present application are not limited to this, as long as the orthographic projection of the pixel opening 62 on the substrate 10 is within the orthographic projection of the first opening 411 on the substrate 10.

[0262] Furthermore, in the embodiment of the present application, by arranging the pixel opening 62 on the substrate 10 so that the orthographic projection thereof is located within the orthographic projection of the first opening 411 on the substrate 10, the light-emitting portion 211 can be better arranged to correspond to the first opening 411, thereby further reducing the absorption effect of the first shading layer 41 on the light emitted by the light-emitting portion 211 and within a specific viewing angle range, thereby improving the light extraction efficiency of the display panel 100, which has strong practicality.

[0263] In some embodiments, the orthographic projection of the pixel opening 62 on the substrate 10 has a first edge, the orthographic projection of the first opening 411 on the substrate 10 has a second edge, and the distance between the first edge and the second edge is D1, and D1 satisfies 0≤D1≤4μm. Optionally, D1 is one of 0μm, 0.5μm, 1μm, 2μm, and 4μm.

[0264] The first edge is an edge line of the positive projection of the pixel opening 62 on the substrate 10, and the second edge is an edge line of the positive projection of the first opening 411 on the substrate 10, and the first edge and the second edge are arranged adjacent to each other. Among them, the first edge and the second edge can have a variety of shapes, for example, they can include shapes such as straight lines, curves, and broken lines. And the shapes of the first edge and the second edge can be the same, or they can be different, and the distance D1 is the average distance between the first edge and the second edge. Optionally, the first edge and the second edge both include a straight line structure extending along the first direction, and in this case, the distance D1 is the distance between the two straight line structures in the second direction, wherein the first direction and the second direction and the thickness direction X are arranged perpendicular to each other.

[0265] In combination with the above content, it can be known that since the first light shielding layer 41 is closer to the first electrode layer 22, the orthographic projection area of ​​the first opening 411 on the substrate 10 can be reduced without affecting the light-emitting effect of the light-emitting portion 211. On this basis, the embodiment of the present application limits the distance D1 between the first edge and the second edge to be no more than 4 μm, thereby helping to further reduce the orthographic projection area of ​​the first opening 411 on the substrate 10, increase the coverage area of ​​the first light shielding layer 41 for the first electrode layer 22, further reduce the reflectivity of the display panel 100, and improve the display effect.

[0266] In some embodiments, the pixel defining portion 61 includes a light shielding material, that is, the pixel defining portion 61 can absorb light. Depending on actual needs, the pixel defining portion 61 can include the same material as the first light shielding layer 41, or both can include different light shielding materials. The specific material composition of the pixel defining portion 61 is not limited in the embodiment of the present application. Optionally, the material of the pixel defining portion 61 includes carbon black.

[0267] In the embodiment of the present application, the pixel defining portion 61 is provided with a light shielding material, so that the pixel defining portion 61 can shield part of the signal wiring or device structure in the substrate 10, thereby reducing the reflection problem caused by some structures in the substrate 10 and reducing the overall reflectivity of the display panel 100. At the same time, part of the wide viewing angle light emitted by the light-emitting portion 211 can also be absorbed or shielded by the pixel defining portion 61, so that the mixing effect between the wide viewing angle light emitted by different light-emitting portions 211 can be reduced, the degree of light mixing of the display panel 100 can be reduced, and the display effect can be improved.

[0268] In some embodiments, the display panel 100 also includes a conductive layer 70 disposed on the side of the first shading layer 41 facing away from the substrate 10, and a second shading layer 42 located on the side of the conductive layer 70 facing away from the substrate 10, and the second shading layer 42 is provided with a plurality of second openings 421, wherein the orthographic projection of the first opening 411 on the substrate 10 is located within the orthographic projection of the second opening 421 on the substrate 10.

[0269] The conductive layer 70 is a film structure including a conductor or semiconductor structure in the display panel 100 and located on the side of the first electrode layer 22 away from the substrate 10. According to different actual needs, the conductive layer 70 can be located on the side of the first light shielding layer 41 away from the substrate 10, and further, the conductive layer 70 can be located on the side of the second inorganic encapsulation layer 53 away from the substrate 10. The specific functional effect of the conductive layer 70 is not limited in the embodiment of the present application. Optionally, the conductive layer 70 includes a touch layer 71, that is, the conductive layer 70 is a film structure in the display panel 100 that can realize the touch function.

[0270] In view of the situation where the conductive layer 70 is located on the side of the first shading layer 41 away from the substrate 10, since the first shading layer 41 cannot cover the conductive layer 70, and the material structure within the conductive layer 70 will also reflect the ambient light, in order to reduce the influence of the conductive layer 70 on the reflectivity of the display panel 100, the embodiment of the present application also provides a second shading layer 42 on the side of the conductive layer 70 away from the substrate 10. The second shading layer 42 can cover the conductive layer 70, thereby reducing the possibility of ambient light propagating to the surface of the conductive layer 70 away from the substrate 10, thereby reducing the adverse effect of the conductive layer 70 on the reflectivity of the display panel 100.

[0271] The embodiment of the present application does not limit the material composition of the second light-shielding layer 42. The material in the second light-shielding layer 42 can be the same as the material in the first light-shielding layer 41, or the materials of the two can also be different, as long as the first light-shielding layer 41 and the second light-shielding layer 42 can meet the needs of absorbing or blocking light.

[0272] The second opening 421 is an opening structure in the second light-shielding layer 42 for allowing light to pass through. Similar to the first opening 411, the second opening 421 is also arranged corresponding to the light-emitting portion 211, but the difference is that the orthographic projection area of ​​the second opening 421 on the substrate 10 can be designed to be larger than the orthographic projection area of ​​the first opening 411 on the substrate 10, so that the orthographic projection of the first opening 411 on the substrate 10 is located within the orthographic projection of the second opening 421 on the substrate 10.

[0273] Specifically, in combination with the foregoing content, it can be known that the existence of the first shading layer 41 allows the light within a partial tilt angle range emitted by the light-emitting portion 211 to be emitted from the display panel 100, while the light within other larger tilt angle ranges emitted by the light-emitting portion 211 will be absorbed or blocked by the first shading layer 41, thereby reducing the risk of color mixing of light emitted by different light-emitting portions 211 and improving display accuracy.

[0274] On this basis, since the first light shielding layer 41 can satisfy the absorption or shielding effect of the light emitted by the light-emitting portion 211 at a relatively large tilt angle, the design of the second light shielding layer 42 is no longer limited to absorbing or shielding the light emitted by the light-emitting portion 211 at a relatively large tilt angle. Further, the orthographic projection area of ​​the second light shielding layer 42 on the substrate 10 can be adaptively reduced, as long as the second light shielding layer 42 can cover the conductive layer 70. Optionally, the conductive layer 70 includes a conductive portion, and the orthographic projection of the conductive portion on the substrate 10 is located within the orthographic projection of the second light shielding layer 42 on the substrate 10.

[0275] In summary, in the embodiment of the present application, since the design of the second light-shielding layer 42 is no longer limited to absorbing or shielding light emitted by the light-emitting portion 211 at a larger inclined angle, its orthographic projection area on the substrate 10 can be appropriately reduced, so that the orthographic projection of the first opening 411 on the substrate 10 is located within the orthographic projection of the second opening 421 on the substrate 10. This reduces the reflection of the conductive layer 70 while reducing the influence of the second light-shielding layer 42 on the light-emitting effect of the light-emitting portion 211, thereby improving the viewing experience of the display panel 100.

[0276] In some embodiments, the distance between the orthographic projection of the conductive portion on the substrate 10 and the orthographic projection of the adjacent second opening 421 on the substrate 10 is D2, and D2 satisfies 0≤D2≤2μm. Optionally, D2 is one of 0, 0.5μm, 1μm, 1.5μm and 2μm.

[0277] In the embodiment of the present application, since the second light shielding layer 42 can only shield the conductive layer 70 without blocking the light-emitting effect of the light-emitting portion 211, the shape and size of the second light shielding layer 42 and the conductive layer 70 can be further matched and designed, so that the distance D2 between the orthographic projection of the conductive portion on the substrate 10 and the orthographic projection of the adjacent second opening 421 on the substrate 10 can be reduced to no more than 2μm, thereby reducing the impact of the second light shielding layer 42 on the light-emitting effect of the light-emitting portion 211 and improving the viewing experience of the display panel 100. At the same time, the distance D2 is set to be not less than 0, so that the second light shielding layer 42 can completely cover the conductive layer 70, thereby reducing the possibility of reflection of ambient light at the conductive layer 70 and reducing the overall reflectivity of the display panel 100.

[0278] In some embodiments, the second shading layer 42 includes a shading portion 422 located between two adjacent second openings 421, and the orthographic projection of the shading portion 422 on the substrate 10 is arranged to coincide with the edge of the orthographic projection of the conductive portion on the substrate 10, that is, the distance D2 between the orthographic projection of the conductive portion on the substrate 10 and the orthographic projection of the adjacent second opening 421 on the substrate 10 is equal to 0.

[0279] The light shielding portion 422 is a structure located between adjacent second openings 421 in the light shielding layer and includes a light shielding material, wherein a plurality of light shielding portions 422 located between different adjacent second openings 421 may be connected to each other. Optionally, the orthographic projection of the light shielding portion 422 on the substrate 10 may be a mesh structure.

[0280] In the embodiment of the present application, the size of the second shading layer 42 is further limited in design so that the orthographic projection of the shading portion 422 on the substrate 10 is arranged to coincide with the edge of the orthographic projection of the conductive portion on the substrate 10. In this way, while satisfying the requirement that the shading layer covers and blocks the conductive layer 70 to reduce the adverse effect of the conductive layer 70 on the reflectivity of the display panel 100, the size of the shading portion 422 in the second shading layer 42 can be further reduced, thereby reducing the influence of the second shading layer 42 on the luminous effect of the luminous portion 211, and improving the viewing experience of the display panel 100.

[0281] In some embodiments, the second light shielding layer 42 includes a matte material. The matte material is a special chemical material set on the surface of an object. The presence of the matte material can reduce the reflected light on the surface of the object, reduce the brightness, and present a dull effect.

[0282] In the embodiment of the present application, by providing the second shading layer 42 with a matte material, the second shading layer 42 can absorb or block light, and the presence of the matte material can also allow some other light-transmitting or light-reflecting materials to be optionally provided in the second shading layer 42, thereby increasing the diversity of material choices in the second shading layer 42 and helping to reduce preparation costs.

[0283] In some embodiments, the second light shielding layer 42 includes blackened metal, which refers to a metal material that has been subjected to a blackening treatment, wherein the blackening treatment refers to forming a black film on the metal surface by a chemical or physical method.

[0284] In the embodiment of the present application, both the conductive layer 70 and the second light shielding layer 42 may include metal materials. On this basis, the second light shielding layer 42 may be formed by etching together with the conductive layer 70, so that the second light shielding layer 42 covers the conductive layer 70 and the orthographic projection area of ​​the second light shielding layer 42 on the substrate 10 is reduced, thereby improving the viewing experience of the display panel 100. At the same time, under this design, the conductive layer 70 and the second light shielding layer 42 may meet the etching needs of both through a sacrificial layer, thereby eliminating a sacrificial layer, simplifying the yellow light process, reducing the preparation cost and improving the preparation efficiency.

[0285] In some embodiments, the material of the second light shielding layer 42 includes at least one of molybdenum, aluminum, titanium, niobium, tantalum, indium, zinc, and oxides, nitrides, and oxynitrides thereof.

[0286] Optionally, when the second light shielding layer 42 includes a blackened metal, the blackened metal may include a stacked structure of molybdenum oxide, molybdenum and molybdenum oxide, or may include a stacked structure of aluminum oxide, aluminum and aluminum oxide, or may include a stacked structure of molybdenum oxide, titanium and molybdenum oxide, and utilize the coherence and destructive effects between different film layers to reduce interference light and improve the contrast of the display panel 100. Alternatively, the second light shielding layer 42 may also include indium zinc oxide and molybdenum niobium oxynitride (MoNbOxNy; Mo is molybdenum metal, Nb is niobium metal, x and y are integers or decimals), and further optionally, molybdenum niobium oxynitride is located on the surface of indium zinc oxide away from the substrate 10. Among them, molybdenum niobium oxynitride is a matte material, and molybdenum niobium oxynitride can absorb or block light incident on the surface of indium zinc oxide.

[0287] In some embodiments, the display panel 100 also includes a first inorganic encapsulation layer 51 disposed between the first light shading layer 41 and the first electrode layer 22, and a touch layer 71 disposed between the first light shading layer 41 and the first inorganic encapsulation layer 51, and the orthographic projection of the touch layer 71 on the substrate 10 is located within the orthographic projection of the first light shading layer 41 on the substrate 10.

[0288] By comparison with the above content, the touch layer 71 can be located on the side of the first light shielding layer 41 facing away from the substrate 10, in addition to being located on the side of the first light shielding layer 41 facing the substrate 10. In this case, the first light shielding layer 41 can cover and shield the touch layer 71, and under this design, the display panel 100 may not be provided with the second light shielding layer 42 on the side of the first light shielding layer 41 facing away from the substrate 10. Of course, in other embodiments, the second light shielding layer 42 may be provided on the side of the first light shielding layer 41 facing away from the substrate 10, and the second light shielding layer 42 is used to cover and shield other conductive film layers except the touch layer 71.

[0289] Furthermore, in order to meet the covering and shielding effect of the touch layer 71, the embodiment of the present application sets the orthographic projection of the touch layer 71 on the substrate 10 to be located within the orthographic projection of the first shading layer 41 on the substrate 10. At the same time, considering that the touch layer 71 and the first electrode layer 22 both include conductive materials and the signals transmitted therein are not the same, the embodiment of the present application also sets the first inorganic encapsulation layer 51 between the touch layer 71 and the first electrode layer 22, so as to improve the reliability of signal transmission between the touch layer 71 and the first electrode layer 22.

[0290] In summary, in the embodiment of the present application, by adjusting the film layer position of the touch layer 71, it is located on the side of the first light-shielding layer 41 facing the substrate 10, and the orthographic projection of the touch layer 71 on the substrate 10 is set to be located within the orthographic projection of the first light-shielding layer 41 on the substrate 10, so that the first light-shielding layer 41 can also play a covering and shielding role for the touch layer 71, thereby selectively canceling the setting of other light-shielding film layers above the first light-shielding layer 41, reducing the overall thickness of the display panel 100 and improving the feel of use.

[0291] It should be noted that the embodiment of the present application does not limit the positional relationship of the touch layer 71 relative to the organic encapsulation layer 52 and the second inorganic encapsulation layer 53, as long as the touch layer 71 is located on the side of the first light shielding layer 41 facing the substrate 10. In some embodiments, the display panel 100 further includes an organic encapsulation layer 52 disposed on the side of the first inorganic encapsulation layer 51 facing away from the substrate 10, and a second inorganic encapsulation layer 53 located on the side of the organic encapsulation layer 52 facing away from the substrate 10, and the first light shielding layer 41 and the touch layer 71 are both located between the first inorganic encapsulation layer 51 and the organic encapsulation layer 52.

[0292] In some embodiments, the display panel 100 also includes a cover layer structure 30 disposed between the first light shading layer 41 and the light-emitting functional layer 20, and the cover layer structure 30 includes a first cover layer 31, a second cover layer 33 and a low-reflection layer 32 located between the first cover layer 31 and the second cover layer 33.

[0293] The cover layer structure 30 is located on the side of the light-emitting functional layer 20 away from the substrate 10 along the thickness direction X. The cover layer structure 30 is an important auxiliary film layer, which is arranged at a position close to the first electrode layer 22. The existence of the cover layer structure 30 can improve the optical properties of the display panel 100, which helps to improve the luminous efficiency while promoting the improvement of the life of the display panel 100.

[0294] The first cover layer 31 and the second cover layer 33 are important components of the cover layer structure 30. Both the first cover layer 31 and the second cover layer 33 can be configured to improve the external emission efficiency of the light-emitting functional layer 20 according to the principle of constructive interference. According to different actual needs, the material in the first cover layer 31 may include organic material, or may also include inorganic material. The specific material composition of the first cover layer 31 is not limited in the embodiment of the present application, and the specific material composition of the second cover layer 33 is the same.

[0295] In some optional embodiments, the materials of the first cover layer 31 and the second cover layer 33 are different. In this way, the first cover layer 31 and the second cover layer 33 can have different parameter ranges in a specific field, for example, the first cover layer 31 and the second cover layer 33 can have different refractive index parameter ranges or absorptivity parameter ranges or reflectivity parameter ranges, so that the light emitted by the light-emitting portion 211 can be further adjusted through the cooperation between the first cover layer 31 and the second cover layer 33, so as to further improve the light extraction efficiency of the display panel 100.

[0296] The low-reflection layer 32 is also located in the cover layer structure 30. The low-reflection layer 32 is a film layer structure including a low-reflectivity material. The presence of the low-reflection layer 32 can reduce the reflectivity of the display panel 100, thereby improving the contrast of the display panel 100 under outdoor lighting scenes. Furthermore, through experimental verification, it is found that the spacing between the low-reflection layer 32 and the first electrode layer 22 in the thickness direction X has an important influence on the device efficiency and reflectivity.

[0297] Furthermore, through analysis of experimental data, it can be known that in the embodiment of the present application, by adding a cover layer structure 30 in the display panel 100, it helps to improve the light extraction efficiency of the display panel 100. On this basis, by integrating the low-reflection layer 32 in the cover layer structure 30 and arranging it on the side of the first cover layer 31 facing the substrate 10, it helps to reduce the distance between the low-reflection layer 32 and the first electrode layer 22, thereby achieving a higher light extraction efficiency and lower reflectivity of the display panel 100 at the same time, which helps to enhance the use effect and applicable scene range of the display panel 100.

[0298] In some embodiments, the distance between the low reflective layer 32 and the first electrode layer 22 in the thickness direction X of the substrate 10 is L1, and L1 satisfies 5nm≤L1≤25nm. Optionally, L1 is one of 5nm, 10nm, 15nm, 20nm and 25nm.

[0299] In the embodiment of the present application, in order to make the display panel 100 have higher light extraction efficiency and lower reflectivity at a plurality of different color light emitting portions 211, the distance L1 between the low-reflection layer 32 and the first substrate 10 is set to be not less than 5nm and not more than 25nm in combination with the experimental results. This can enhance the overall light extraction efficiency of the display panel 100 and reduce the overall reflectivity while reducing the display difference in different color areas, thereby improving the display uniformity of the display panel 100.

[0300] In some embodiments, the thickness of the low reflection layer 32 is L2, and L2 satisfies: 5nm≤L2≤15nm. The thickness mentioned here refers to the dimension of the low reflection layer 32 in the thickness direction X. Optionally, L2 is one of 5nm, 7.5nm, 10nm, 12nm and 15nm.

[0301] In the embodiment of the present application, in order to enhance the light extraction efficiency of the display panel 100 and reduce the reflectivity, in addition to reducing the distance L1 between the low-reflection layer 32 and the first electrode layer 22, the thickness of the low-reflection layer 32 can also be limited to be no less than 5 nm and no more than 15 nm, thereby helping to further improve the display effect of the display panel 100 and improve the viewing experience.

[0302] In addition, in order to improve the display performance, the parameters such as the absorptivity and refractive index of the low-reflection layer 32 may also be restricted. In some optional embodiments, the material of the low-reflection layer 32 includes a light-absorbing material, the absorptivity of the low-reflection layer 32 is k, k satisfies: k≥0.5; and / or, the refractive index of the low-reflection layer 32 is n1, n1 satisfies n1≥1. The absorptivity mentioned here represents the absorption capacity of the corresponding low-reflection layer 32 for light.

[0303] In the embodiment of the present application, by setting the low-reflection layer 32 to include a light-absorbing material with an absorptivity of not less than 0.5, the low-reflection layer 32 can absorb more ambient light and reduce the amount of light corresponding to the reflected light, thereby reducing the reflectivity of the display panel 100 and improving the display effect.

[0304] The embodiment of the present application does not limit the material composition of the low-reflection layer 32. Optionally, the material of the low-reflection layer 32 includes at least one of a metal, an alloy, and a metal oxide, or the low-reflection layer 32 may also include a multi-layer metal structure. Further optionally, the material of the low-reflection layer 32 includes at least one of ytterbium, bismuth, cobalt, molybdenum, titanium, zirconium, aluminum, chromium, niobium, platinum, tungsten, indium, tin, iron, nickel, tantalum, manganese, zinc, and germanium.

[0305] Third, see Fig.18An embodiment of the present application provides a display device 200, and the display device 200 includes the display panel 100 in any of the aforementioned embodiments.

[0306] The display device in the embodiments of the present application includes but is not limited to mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, consoles, and other devices with display functions.

[0307] It should be noted that the display device 200 provided in the embodiment of the present application has the beneficial effects of the display panel 100 in any of the aforementioned embodiments. For details, please refer to the aforementioned description of the beneficial effects of the display panel 100, which will not be repeated in the embodiment of the present application.

[0308] Although the embodiments disclosed in this application are as above, the contents described are only embodiments adopted for facilitating the understanding of this application and are not intended to limit the present invention. Any technician in the technical field to which this application belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in this application, but the scope of protection of this application shall still be subject to the scope defined in the attached claims.

[0309] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the replacement of other connection methods described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that: include: substrate; A light-emitting functional layer is disposed on one side of the substrate, wherein the light-emitting functional layer comprises a light-emitting layer and a first electrode layer located on a side of the light-emitting layer away from the substrate; The capping layer structure is arranged on the side of the light-emitting functional layer away from the substrate, and the capping layer structure comprises a first capping layer and a low-reflection layer located on the side of the first capping layer facing the substrate.

2. The display panel according to claim 1, characterized in that The distance between the low reflection layer and the first electrode layer in the thickness direction of the substrate is L1, and L1 satisfies 5nm≤L1≤25nm; Preferably, the thickness of the low reflection layer is L2, and L2 satisfies: 5nm≤L2≤15nm; Preferably, the material of the low reflection layer includes a light absorbing material, the absorptivity of the low reflection layer is k, k satisfies: k≥0.5; and / or the refractive index of the low reflection layer is n1, n1 satisfies n1≥1; Preferably, the material of the low-reflection layer includes at least one of metal, alloy and metal oxide; Preferably, the material of the low reflection layer includes at least one of ytterbium, bismuth, cobalt, molybdenum, titanium, zirconium, aluminum, chromium, niobium, platinum, tungsten, indium, tin, iron, nickel, tantalum, manganese, zinc and germanium.

3. The display panel according to claim 1, characterized in that: The cap layer structure further includes a second cap layer disposed on a side of the low-reflection layer facing the substrate; Preferably, the cap layer structure further comprises a third cap layer located on a side of the low reflection layer facing the substrate; and / or, the cap layer structure further comprises a fourth cap layer located on a side of the low reflection layer facing away from the substrate; Preferably, the first cover layer and the second cover layer are made of different materials.

4. The display panel according to claim 1, characterized in that: The material of the first cap layer includes at least one of an organic material and an inorganic material; Preferably, the cover layer structure further comprises a second cover layer arranged on a side of the low-reflection layer facing the substrate; Wherein, the refractive index of the first cover layer is n2, and n2 satisfies n2≥1.6; and / or the refractive index of the second cover layer is n3, and n3 satisfies n3≥1.6; Preferably, the sum of the thicknesses of the multiple cap layers in the cap layer structure is L3, and L3 satisfies: 60nm≤L3≤90nm; Preferably, the refractive index of the multiple cap layers in the cap layer structure is greater than or equal to 1.

6.

5. The display panel according to claim 1, characterized in that: The display panel further comprises a first light shielding layer disposed on a side of the cover layer structure away from the substrate; The first light shielding layer is provided with a plurality of first openings, the light emitting layer includes a plurality of light emitting parts, and the orthographic projections of the light emitting parts on the substrate overlap with the orthographic projections of the first openings on the substrate; Preferably, the orthographic projection of the first light shielding layer on the substrate overlaps with the orthographic projection of the first cover layer on the substrate; Preferably, the orthographic projection of the first opening on the substrate overlaps with the orthographic projection of the low-reflection layer on the substrate.

6. The display panel according to claim 5, characterized in that: The display panel further comprises a second inorganic encapsulation layer disposed on a side of the cover layer structure away from the substrate; Preferably, the first light shielding layer is located on a side of the second inorganic encapsulation layer facing the substrate; Preferably, the display panel further comprises an organic encapsulation layer located on a side of the second inorganic encapsulation layer facing the substrate, and the first light shielding layer is located between the second inorganic encapsulation layer and the organic encapsulation layer; or, the first light shielding layer is located between the organic encapsulation layer and the capping structure; Preferably, the display panel further comprises a first inorganic encapsulation layer located on a side of the organic encapsulation layer facing the substrate; The first light shielding layer is located on a side of the first inorganic encapsulation layer away from the substrate; or, the first light shielding layer is located between the first inorganic encapsulation layer and the capping layer structure; Preferably, a distance between the first light shielding layer and the first electrode layer in the thickness direction of the substrate is L4, and L4 satisfies 0<L4≤3μm.

7. The display panel according to claim 5, characterized in that: The display panel further comprises a pixel definition layer, wherein the pixel definition layer comprises a pixel definition portion and a pixel opening formed by the pixel definition portion, and the plurality of light emitting portions are arranged in the plurality of pixel openings; Wherein, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the first opening on the substrate; Preferably, the pixel opening has a first edge on the orthographic projection of the substrate, the first opening has a second edge on the orthographic projection of the substrate, the distance between the first edge and the second edge is D1, and D1 satisfies 0≤D1≤4μm; Preferably, the pixel defining portion comprises a light shielding material; Preferably, the material of the pixel defining portion includes carbon black.

8. The display panel according to claim 6, characterized in that: The display panel further comprises a conductive layer disposed on a side of the first light shielding layer away from the substrate, and a second light shielding layer disposed on a side of the conductive layer away from the substrate, wherein the second light shielding layer is provided with a plurality of second openings; Wherein, the orthographic projection of the first opening on the substrate is located within the orthographic projection of the second opening on the substrate; Preferably, the conductive layer includes a touch layer; Preferably, the conductive layer comprises a conductive portion, and an orthographic projection of the conductive portion on the substrate is located within an orthographic projection of the second light-shielding layer on the substrate; Preferably, a distance between an orthographic projection of the conductive portion on the substrate and an orthographic projection of an adjacent second opening on the substrate is D2, and D2 satisfies 0≤D2≤2 μm.

9. The display panel according to claim 8, characterized in that: The second light shielding layer comprises a light shielding portion located between two adjacent second openings, wherein the orthographic projection of the light shielding portion on the substrate overlaps with the edge of the orthographic projection of the conductive portion on the substrate; Preferably, the second light-shielding layer comprises a matte material; Preferably, the second light-shielding layer comprises blackened metal; Preferably, the material of the second light shielding layer includes at least one of molybdenum, aluminum, titanium, niobium, tantalum, indium, zinc, and oxides, nitrides, and oxynitrides thereof; Preferably, the material of the second light-shielding layer includes molybdenum niobium oxynitride and indium zinc oxide; Preferably, the molybdenum niobium oxynitride is located on a surface of the indium zinc oxide facing away from the substrate.

10. The display panel according to claim 5, characterized in that: It also includes a first inorganic encapsulation layer disposed between the first light shielding layer and the first electrode layer, and a touch layer disposed between the first light shielding layer and the first inorganic encapsulation layer, wherein the orthographic projection of the touch layer on the substrate is located within the orthographic projection of the first light shielding layer on the substrate; Preferably, the display panel further comprises an organic encapsulation layer located on a side of the first inorganic encapsulation layer away from the substrate, and a second inorganic encapsulation layer located on a side of the organic encapsulation layer away from the substrate; The first light shielding layer and the touch control layer are both located between the first inorganic encapsulation layer and the organic encapsulation layer.

11. The display panel according to claim 1, characterized in that: It also includes an optical layer disposed on a side of the cover layer structure away from the substrate, wherein the optical layer is configured to absorb light of a specific wavelength band; Wherein, the light-emitting layer includes a plurality of light-emitting parts, and the orthographic projection of the optical layer on the substrate covers the orthographic projections of the plurality of light-emitting parts on the substrate; Preferably, the optical layer has a planar structure; Preferably, the display panel further comprises a thin film encapsulation layer disposed on a side of the cover layer structure away from the substrate, and the optical layer is located on a side of the thin film encapsulation layer away from the substrate; Preferably, the display panel further comprises a thin film encapsulation layer disposed on a side of the cover layer structure away from the substrate, and a second light shielding layer disposed on a side of the thin film encapsulation layer away from the substrate, wherein the second light shielding layer is provided with a plurality of second openings; Wherein, the optical layer is partially located on a side of the second light shielding layer away from the substrate, and partially located at the second opening; Preferably, the material of the optical layer includes at least one of a dye and a pigment; Preferably, the material of the optical layer includes at least one of subphthalocyanine and copper phthalocyanine.

12. The display panel according to claim 1, characterized in that: It also includes an isolation structure disposed on one side of the substrate, the isolation structure encloses a plurality of isolation openings, and the light-emitting functional layer includes a light-emitting portion disposed corresponding to the isolation openings; Wherein, the cover layer structure comprises a cover layer unit arranged corresponding to the isolation opening; Preferably, the first cover layer comprises a first cover portion located in the cover layer unit, and at least different parts of the first cover portion are made of different materials; and / or at least different parts of the first cover portion are made of different thicknesses; Preferably, the material of the cover layer unit includes at least one of a dye and a pigment; Preferably, the material of the cap layer unit includes at least one of subphthalocyanine and copper phthalocyanine; Preferably, the low-reflection layer comprises a low-reflection portion located in the cover layer unit, and at least part of the low-reflection portions are made of different materials; and / or at least part of the low-reflection portions are made of different thicknesses.

13. A display panel, characterized in that: include: substrate; A light-emitting functional layer is disposed on one side of the substrate, the light-emitting functional layer comprises a light-emitting layer and a first electrode layer located on a side of the light-emitting layer away from the substrate, the light-emitting layer comprises a plurality of light-emitting portions; A first light shielding layer is arranged on a side of the light-emitting functional layer away from the substrate, the first light shielding layer is provided with a plurality of first openings, and the orthographic projection of the light-emitting portion on the substrate and the orthographic projection of the first opening on the substrate are arranged to overlap; The second inorganic encapsulation layer is arranged on a side of the first light shielding layer away from the substrate.

14. The display panel according to claim 13, characterized in that: The display panel further includes an organic encapsulation layer located on a side of the second inorganic encapsulation layer facing the substrate, and a first inorganic encapsulation layer located on a side of the organic encapsulation layer facing the substrate; The first light shielding layer is located between the first inorganic encapsulation layer and the organic encapsulation layer; or, the first light shielding layer is located on a side of the first inorganic encapsulation layer facing the substrate; Preferably, a distance between the first light shielding layer and the first electrode layer in a thickness direction of the substrate is L4, and L4 satisfies 0≤L4≤3 μm.

15. The display panel according to claim 13, characterized in that: The display panel further comprises a pixel definition layer, wherein the pixel definition layer comprises a pixel definition portion and a pixel opening formed by the pixel definition portion, and the plurality of light emitting portions in the light emitting layer are arranged in the plurality of pixel openings; Wherein, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the first opening on the substrate; Preferably, the pixel opening has a first edge on the orthographic projection of the substrate, the first opening has a second edge on the orthographic projection of the substrate, the distance between the first edge and the second edge is D1, and D1 satisfies 0≤D1≤4μm; Preferably, the pixel defining portion comprises a light shielding material; Preferably, the material of the pixel defining portion includes carbon black.

16. The display panel according to claim 13, characterized in that: The display panel further includes a conductive layer disposed on a side of the first light shielding layer away from the substrate, and a second light shielding layer located on a side of the conductive layer away from the substrate, wherein the second light shielding layer encloses a plurality of second openings; Wherein, the orthographic projection of the first opening on the substrate is located within the orthographic projection of the second opening on the substrate; Preferably, the conductive layer includes a touch layer; Preferably, the conductive layer includes a conductive portion, and the second light shielding layer is arranged to cover the conductive portion; Preferably, a distance between an orthographic projection of the conductive portion on the substrate and an orthographic projection of an adjacent second opening on the substrate is D2, and D2 satisfies 0≤D2≤2 μm.

17. The display panel according to claim 16, characterized in that: The conductive layer includes a conductive portion, the second light shielding layer includes a light shielding portion located between two adjacent second openings, and the orthographic projection of the light shielding portion on the substrate is arranged to overlap with the edge of the orthographic projection of the conductive portion on the substrate; Preferably, the second light-shielding layer comprises a matte material; Preferably, the second light-shielding layer comprises blackened metal; Preferably, the material of the second light shielding layer includes at least one of molybdenum, aluminum, titanium, niobium, tantalum, indium, zinc, and oxides, nitrides, and oxynitrides thereof; Preferably, the material of the second light-shielding layer includes molybdenum niobium oxynitride and indium zinc oxide; Preferably, the molybdenum niobium oxynitride is located on a surface of the indium zinc oxide facing away from the substrate.

18. The display panel according to claim 13, characterized in that: It also includes a touch layer disposed between the first light shielding layer and the first electrode layer, wherein the orthographic projection of the touch layer on the substrate is located within the orthographic projection of the first light shielding layer on the substrate; Preferably, the display panel further comprises an organic encapsulation layer located on a side of the second inorganic encapsulation layer facing the substrate, and a first inorganic encapsulation layer located on a side of the organic encapsulation layer facing the substrate; The first light shielding layer and the touch control layer are both located between the first inorganic encapsulation layer and the organic encapsulation layer.

19. The display panel according to claim 13, characterized in that: It also includes a cap layer structure disposed between the first light shielding layer and the light-emitting functional layer, wherein the cap layer structure includes a first cap layer, a second cap layer and a low-reflection layer located between the first cap layer and the second cap layer; Preferably, the distance between the low-reflection layer and the first electrode layer in the thickness direction of the substrate is L1, and L1 satisfies 5nm≤L1≤25nm; Preferably, the thickness of the low reflection layer is L2, and L2 satisfies: 5nm≤L2≤15nm; Preferably, the material of the low reflection layer includes a light absorbing material, the absorptivity of the low reflection layer is k, k satisfies: k≥0.5; and / or the refractive index of the low reflection layer is n1, n1 satisfies n1≥1.

20. A display device, characterized in that: Comprising the display panel as claimed in any one of claims 1 to 19.

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