Display panel and display device

Abstract

The application relates to a display panel and a display device. The display panel has a light-out side for light emission. The display panel further comprises a first electrode, a light-emitting layer and a light-concentrating layer. The light-concentrating layer is located on the side of the first electrode away from the light-emitting layer and on the light-out side of the display panel. The light-concentrating layer comprises an outer wrapping part and a light-concentrating part, and the light-concentrating part comprises an inner wrapping part, an outer core part and an inner core part. In the plane where the light-concentrating layer is located, the outer wrapping part, the inner wrapping part, the outer core part and the inner core part do not overlap with each other. The outer wrapping part surrounds at least three inner core parts. The light-emitting layer comprises at least three sub-pixels, and the orthographic projection of each sub-pixel on the first electrode is located within the orthographic projection of one inner core part on the first electrode. Each inner core part surrounds at least three inner wrapping parts. In each inner core part, the at least three inner wrapping parts are arranged in an array around the center of the inner core part. The inner wrapping part surrounds the outer core part. The refractive index of the outer wrapping part is greater than that of the inner core part and the outer core part. The refractive index of the inner wrapping part is greater than that of the inner core part and the outer core part.

Description

Technical Field

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

[0002] Among related technologies, organic light-emitting diode (OLED) display devices have become the mainstream technology in the display field due to their advantages such as self-illumination, wide viewing angle, fast response speed, high brightness and low power consumption.

[0003] However, improving the front light emission efficiency of organic light-emitting diode (OLED) display devices has always been a technical challenge. Summary of the Invention

[0004] This application provides a display panel and display device to address all or part of the shortcomings in the related art.

[0005] According to a first aspect of the embodiments of this application, a display panel is provided, the display panel having a light-emitting side, the light-emitting side being the side of the display panel used for emitting light;

[0006] The display panel includes a light-emitting layer, a first electrode located on one side of the light-emitting layer, and a light-concentrating layer. The light-concentrating layer is located on the side of the first electrode away from the light-emitting layer and is located on the light-emitting side of the display panel.

[0007] The light-concentrating layer includes an outer cladding portion and a light-concentrating portion; on the plane of the light-concentrating layer, the outer cladding portion surrounds at least three light-concentrating portions; the light-concentrating portion includes an inner cladding portion, an outer core portion, and an inner core portion; on the plane of the light-concentrating layer, the outer cladding portion, the inner cladding portion, the outer core portion, and the inner core portion do not overlap; the outer cladding portion surrounds at least three inner core portions; the light-emitting layer includes at least three sub-pixels, and the orthographic projection of each sub-pixel on the first electrode lies within the orthographic projection of one of the inner core portions on the first electrode; each inner core portion surrounds at least three inner cladding portions; within each inner core portion, at least three inner cladding portions are arranged in an array around the center of the inner core portion; the inner cladding portion surrounds the outer core portion.

[0008] The refractive index of the outer cladding is greater than that of the inner core and the outer core; the refractive index of the inner cladding is greater than that of the inner core and the outer core.

[0009] In some embodiments, the light-concentrating layer further includes a first-level outer core and a first-level inner cladding layer; each of the outer cores surrounds at least one first-level inner cladding layer, and the first-level inner cladding layer surrounds the first-level outer core.

[0010] In some embodiments, the light-concentrating layer further includes an m-th level outer core and an m-th level inner cladding layer; each of the (m-1)-th level outer cores surrounds at least one m-th level inner cladding layer, and the m-th level inner cladding layer surrounds the m-th level outer core.

[0011] In some embodiments, the shape of the boundary between the (m-1)th level outer core and the mth level inner cladding includes a circle or an ellipse; the shape of the boundary between the mth level inner cladding and the mth level outer core includes a circle or an ellipse, where m is an integer greater than or equal to 2.

[0012] In some embodiments, the shape of the boundary between the inner core and the outer casing includes a circle or an ellipse; the shape of the boundary between the inner core and the inner casing includes a circle or an ellipse; the shape of the boundary between the inner casing and the outer core includes a circle or an ellipse.

[0013] In some embodiments, when the boundary between the inner core and the inner package is elliptical and the boundary between the inner package and the outer core is also elliptical, the major axis of the ellipse is oriented away from the center of the inner core.

[0014] In some embodiments, on the plane where the light-concentrating layer is located, the width of the outer core is greater than or equal to 6 micrometers and less than or equal to 10 micrometers; the width of the inner cladding is greater than or equal to 2 micrometers and less than or equal to 4 micrometers.

[0015] In a direction away from the center of the inner core, the distance between the inner packaging portion and the outer packaging portion is greater than or equal to 0 micrometers and less than or equal to 4 micrometers.

[0016] In some embodiments, the refractive index of the inner core and the outer core is greater than or equal to 1.4 and less than or equal to 1.6; the refractive index of the outer cladding and the inner cladding is greater than or equal to 1.6 and less than or equal to 1.8.

[0017] In some embodiments, the light-emitting layer includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel; the width of the light-concentrating part corresponding to the red sub-pixel is greater than 30 micrometers, the width of the light-concentrating part corresponding to the green sub-pixel is greater than 20 micrometers, and the width of the light-concentrating part corresponding to the blue sub-pixel is greater than 40 micrometers.

[0018] In some embodiments, the wavelength of the light emitted by the sub-pixel is λ; the anti-resonance period of the focusing portion is L; the refractive index of the inner core and the outer core is n1; and the refractive index of the outer cladding and the inner cladding is n2.

[0019] The size and refractive index of the focusing part satisfy the following relationship: 0.5λ≤2*L*√(n1^2-n2^2)≤1.5λ.

[0020] In some embodiments, the size and refractive index of the light-concentrating portion corresponding to different sub-pixels are the same.

[0021] According to a second aspect of the embodiments of this application, a display device is provided, including any of the above-described display panels.

[0022] According to the embodiments of this application, by setting a light-concentrating part structure corresponding to each sub-pixel in the light-concentrating layer, the light emitted by each sub-pixel, after reaching the light-concentrating layer, will propagate to the boundary between the inner core and the inner cladding, resulting in anti-resonance. Under anti-resonance, light that meets the resonance condition can be directly transmitted, while other light that does not meet the resonance condition will be reflected back. By setting the refractive index relationship between the outer cladding, the inner core, and the inner cladding and the outer core, the light emitted by the light-emitting layer that does not reach the light-concentrating layer perpendicularly cannot diffuse in all directions but converges towards the center, eventually converging into the part of the inner core located within the regular hexagon. Thus, the light emitted by each sub-pixel can be converged by the light-concentrating part, and these lights can leave the display panel from the light-emitting side of the display panel in a direction perpendicular to the display panel, thereby improving the front light emission efficiency of the display panel.

[0023] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0025] Figure 1 This is a schematic diagram of the structure of a display panel according to an embodiment of this application;

[0026] Figure 2 This is a partially enlarged top view of a display panel according to an embodiment of this application;

[0027] Figure 3 This application illustrates a positional relationship of a display panel structure in the thickness direction of the display panel, according to an embodiment of the present application.

[0028] Figure 4 This is a partially enlarged top view of another display panel according to an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the structure of another display panel according to an embodiment of this application. Detailed Implementation

[0030] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0031] This application provides a display panel 10, such as Figure 1 As shown, the display panel 10 includes: a light-concentrating layer 11, a cathode 12, a light-emitting layer 13, an anode 14, a pixel definition layer 15, an encapsulation layer 20, a driving array layer 21, and a substrate 22.

[0032] The driving array layer 21 is located on the substrate 22 and is used to drive the display panel 10 to perform display functions. The pixel definition layer 15 and the light-emitting layer 13 are both located on the side of the driving array layer 21 away from the substrate 22, and are situated on the same layer and adjacent to each other. The anode 14 is located between the light-emitting layer 13 and the driving array layer 21. The cathode 12 is located on the side of the pixel definition layer 15 and the light-emitting layer 13 away from the driving array layer 21. The encapsulation layer 20 is located on the side of the cathode 12 away from the cathode 12 and the pixel definition layer 15.

[0033] The display panel 10 has a light-emitting side for emitting light and also includes a first electrode. A light-concentrating layer 11 is located on the side of the first electrode away from the light-emitting layer 13, and is located on the light-emitting side of the display panel 10. Since the display panel 10 shown in this embodiment is a top-emitting structure, in this embodiment, the first electrode is a cathode 12, and the light-emitting side of the display panel 10 is the side of the display panel 10 facing the cathode 12 from the light-emitting layer 13. Therefore, the light-concentrating layer 11 is located on the side of the cathode 12 away from the light-emitting layer 13. Specifically, the light-concentrating layer 11 is located on the side of the encapsulation layer 20 away from the light-emitting layer 13.

[0034] The encapsulation layer 20 is used to encapsulate the display panel 10, and the encapsulation layer 20 includes a first inorganic encapsulation portion 201, an organic encapsulation portion 202, and a second inorganic encapsulation portion 203. The organic encapsulation portion 202 is located between the first inorganic encapsulation portion 201 and the second inorganic encapsulation portion 203. The first inorganic encapsulation portion 201 and the second inorganic encapsulation portion 203 can be formed by chemical vapor deposition, while the organic encapsulation portion 202 can be formed by inkjet printing.

[0035] Figure 2 Shown Figure 1 A magnified top view of a portion of the central region Q1. (See attached image.) Figure 1 and Figure 2 As shown, the light-concentrating layer 11 includes a light-concentrating portion 111 and an outer cladding portion 112. On the plane of the light-concentrating layer 11, the outer cladding portion 112 surrounds at least three light-concentrating portions 111. Each light-concentrating portion 111 includes an inner core portion 113, an inner cladding portion 114, and an outer core portion 115. On the plane of the light-concentrating layer 11, the outer cladding portion 112, the inner core portion 113, the inner cladding portion 114, and the outer core portion 115 do not overlap. The inner core portion 113 is adjacent to the outer cladding portion 112, the inner cladding portion 114 is adjacent to the inner core portion 113, and the outer core portion 115 is adjacent to the inner cladding portion 114. The outer cladding portion 112 surrounds at least three inner core portions 113.

[0036] Figure 3 This shows the positional relationship between the light-concentrating layer 11 and the light-emitting layer 13 along the thickness direction Z of the display panel 10. For example... Figure 1 , Figure 2 and Figure 3 As shown, the light-emitting layer 13 includes at least three sub-pixels 131. The sub-pixels 131 are obtained by filling multiple gaps within the pixel definition layer 15 with organic self-emissive material. Specifically, the light-emitting layer 13 may include a red sub-pixel 131r, a green sub-pixel 131g, and a blue sub-pixel 131b. The orthographic projection of each sub-pixel 131 onto the cathode 12 lies within the orthographic projection of an inner core portion 113 onto the cathode 12, that is, the orthographic projection of each sub-pixel 131 onto the cathode 12 lies within the orthographic projection of a light-concentrating portion 111 onto the cathode 12.

[0037] Each inner core 113 surrounds at least three inner enclosures 114. For example, each inner core 113 surrounds three inner enclosures 114, or each inner core 113 surrounds four inner enclosures 114, or each inner core 113 surrounds five inner enclosures 114, or each inner core 113 surrounds six inner enclosures 114, or each inner core 113 surrounds seven inner enclosures 114, but is not limited thereto. In this embodiment, each inner core 113 surrounds six inner enclosures 114. Within each inner core 113, the six inner enclosures 114 can be arranged in a regular hexagonal array around the center of the inner core 113. Specifically, a regular hexagon 23 is formed around the center of the inner core 113, and the centers of the six inner enclosures 114 are located at the six corners of the regular hexagon 23. It should be noted that the arrangement of the six inner portions 114 in a regular hexagonal array is only one feasible embodiment, and other embodiments are not limited to this. For example, the seven inner portions 114 can be arranged in a regular heptagonal array, or the eight inner portions 114 can be arranged in a regular octagonal array. The inner portions 114 surround the outer core portion 115.

[0038] Furthermore, the refractive index of the outer cladding portion 112 is greater than that of the inner core portion 113 and the outer core portion 115. The refractive index of the inner cladding portion 114 is greater than that of the inner core portion 113 and the outer core portion 115.

[0039] In this embodiment, by providing a light-concentrating section 111 structure corresponding to each sub-pixel 131 in the light-concentrating layer 11, the light emitted by each sub-pixel 131, after reaching the light-concentrating layer 11, will propagate to the boundary between the inner core 113 and the inner enclosure 114, resulting in anti-resonance. Under anti-resonance, light that meets the resonance condition can be directly transmitted, while other light that does not meet the resonance condition will be reflected back. By setting the refractive index relationship between the outer cladding portion 112, the inner core portion 113, the inner cladding portion 114 and the outer core portion 115, the light emitted by the light-emitting layer 13 that is not perpendicularly incident on the light-concentrating layer 11 cannot diffuse in all directions but converges towards the center, eventually converging into the portion of the inner core portion 113 located within the regular hexagon 23. Thus, the light emitted by each sub-pixel 131 can be converged by the light-concentrating portion 111, and these lights can leave the display panel 10 from the light-emitting side of the display panel 10 in a direction perpendicular to the display panel 10, thereby improving the front light emission efficiency of the display panel 10.

[0040] In some embodiments, such as Figure 4 As shown, the focusing layer 11 may further include a first-level inner cladding layer 116 and a first-level outer core 117. Each outer core 115 surrounds at least one first-level inner cladding layer 116. For example, each outer core 115 may surround one first-level inner cladding layer 116, or each outer core 115 may surround two first-level inner cladding layers 116, or each outer core 115 may surround three first-level inner cladding layers 116, or each outer core 115 may surround four first-level inner cladding layers 116, or each outer core 115 may surround five first-level inner cladding layers 116, but is not limited thereto. Figure 4 The illustrated embodiment shows that each outer core 115 surrounds a first-level inner cladding layer 116. The first-level inner cladding layer 116 surrounds the first-level outer core 117. This arrangement further prevents light emitted from the light-emitting layer 13 that is not perpendicularly incident on the light-concentrating layer 11 from diffusing outwards and instead converges towards the center, ultimately converging on the portion of the inner core 113 located within the regular hexagon 23. Consequently, the light emitted by each sub-pixel 131 can be further converged through the light-concentrating portion 111, and this light can exit the display panel 10 from the light-emitting side of the display panel 10 in a direction perpendicular to the display panel 10. This further improves the front light emission efficiency of the display panel 10.

[0041] In some embodiments, the light-concentrating layer 11 may further include an m-th level outer core (not shown) and an m-th level inner cladding layer (not shown). Each (m-1)-th level outer core (not shown) surrounds at least one m-th level inner cladding layer, and the m-th level inner cladding layer surrounds the m-th level outer core. Here, m is an integer greater than or equal to 2. This configuration further prevents light emitted from the light-emitting layer 13 that is not perpendicularly incident on the light-concentrating layer 11 from diffusing outwards but instead converges towards the center, ultimately converging to the portion of the inner core 113 located within the regular hexagon 23. Thus, the light emitted by each sub-pixel 131 can be further converged by the light-concentrating portion 111, and these lights can exit the display panel 10 from the light-emitting side of the display panel 10 in a direction perpendicular to the display panel 10, thereby further improving the front light emission efficiency of the display panel 10.

[0042] In some embodiments, the boundary shape between the (m-1)th level outer core and the mth level inner cladding includes a circle or an ellipse. The boundary shape between the mth level inner cladding and the mth level outer core includes a circle or an ellipse. It should be noted that the boundary shape in this embodiment is not limited to a circle or an ellipse, but can also be other regular arc shapes.

[0043] In some embodiments, the boundary shape between the inner core 113 and the outer enclosure 112 includes a circle or an ellipse. The boundary shape between the inner core 113 and the inner enclosure 114 includes a circle or an ellipse. The boundary shape between the inner enclosure 114 and the outer core 115 includes a circle or an ellipse. It should be noted that the boundary shape in this embodiment is not limited to a circle or an ellipse, and may also be other regular arc shapes.

[0044] In some embodiments, when the boundary between the inner core 113 and the inner enclosure 114 is elliptical and the boundary between the inner enclosure 114 and the outer core 115 is also elliptical, the major axis of the ellipse is oriented away from the center of the inner core 113.

[0045] In some embodiments, such as Figure 2 As shown, on the plane where the light-concentrating layer 11 is located, the width T of the outer core 115 is... 115 Greater than or equal to 6 micrometers and less than or equal to 10 micrometers, for example, the width T of the outer core 115. 115 It can be 6 micrometers, or 7 micrometers, or 8 micrometers, or 9 micrometers, or 10 micrometers, but is not limited to these. The width T of the inner cladding 114 114 Greater than or equal to 2 micrometers and less than or equal to 4 micrometers, for example, the width T of the inner portion 114. 114 It can be 2 micrometers, or the width T of the inner cladding 114. 114 It can be 3 micrometers, or the width T of the inner cladding 114.114 It can be 4 micrometers, but is not limited to this. In the direction away from the center of the inner core 113, the distance T1 between the inner cladding portion 114 and the outer cladding portion 112 is greater than or equal to 0 micrometers and less than or equal to 4 micrometers. For example, the distance T1 can be 0 micrometers, or it can be 1 micrometer, or it can be 2 micrometers, or it can be 3 micrometers, or it can be 4 micrometers, but is not limited to this.

[0046] In some embodiments, the refractive index of the inner core 113 and the outer core 115 is greater than or equal to 1.4 and less than or equal to 1.6. For example, the refractive index of the inner core 113 and the outer core 115 may be 1.4, or 1.5, or 1.6, but is not limited thereto. The refractive index of the outer cladding 112 and the inner cladding 114 is greater than or equal to 1.6 and less than or equal to 1.8. For example, the refractive index of the outer cladding 112 and the inner cladding 114 may be 1.6, or 1.7, or 1.8, but is not limited thereto.

[0047] In some embodiments, such as Figure 3 As shown, the width T of the light-gathering part 111 corresponding to the red sub-pixel 131r is... r Greater than 30 micrometers, for example, the width T of the light-gathering part 111 corresponding to the red sub-pixel 131r. r The width T of the light-gathering part 111 corresponding to the green sub-pixel 131g can be 30.5 micrometers, 35 micrometers, 40 micrometers, 45 micrometers, or 50 micrometers, but is not limited to these. g Greater than 20 micrometers, for example, the width T of the light-collecting portion 111 corresponding to the green sub-pixel 131g. g The width T of the light-gathering part 111 corresponding to the blue sub-pixel 131b can be 20.5 micrometers, or 25 micrometers, or 30 micrometers, or 35 micrometers, or 40 micrometers, but is not limited to these. b Greater than 40 micrometers, for example, the width T of the light-collecting part 111 corresponding to the blue sub-pixel 131b. b It can be 40.5 micrometers, or 45 micrometers, or 50 micrometers, or 55 micrometers, or 60 micrometers, but is not limited to these.

[0048] In some embodiments, the wavelength of the light emitted by the sub-pixel 131 is λ. The anti-resonance period of the light-concentrating part 111 is L, and the anti-resonance period L of the light-concentrating part 111 is twice the width of the inner cladding part, that is, it satisfies the relationship: L=2*T114 The refractive index of the inner core 113 and the outer core 115 is n1. The refractive index of the outer cladding 112 and the inner cladding 114 is n2.

[0049] The size and refractive index of the light-concentrating part 111 satisfy the following relationship: 0.5λ≤2*L*√(n1^2-n2^2)≤1.5λ. When λ=2*L*√(n1^2-n2^2), the light-concentrating part 111 has the strongest ability to confine the light emitted from the light-emitting layer 13. At this time, the light emitted from the light-emitting layer 13 that is not perpendicularly incident on the light-concentrating part 11 can be maximized to prevent it from spreading outwards and instead converge towards the center, ultimately converging into the portion of the inner core 113 located within the regular hexagon 23. Therefore, the light emitted by each sub-pixel 131 can be maximized through the light-concentrating part 111, and this light can exit the display panel 10 from the light-emitting side in a direction perpendicular to the display panel 10. This maximizes the front light emission efficiency of the display panel 10. It should be noted that satisfying the above relationship: λ=2*L*√(n1^2-n2^2) can maximize the confinement ability of the light-concentrating part 111 on the light emitted by the light-emitting layer 13. However, even if the relationship: λ=2*L*√(n1^2-n2^2) is not satisfied, but the following condition is still satisfied: 0.5λ≤2*L*√(n1^2-n2^2)≤1.5λ, the light-concentrating part 111 still has the ability to confine the light emitted by the light-emitting layer 13.

[0050] In some embodiments, the size and refractive index of the light-concentrating portion 111 corresponding to different sub-pixels 131 are the same. Specifically, the size and refractive index of the inner core portion 113 within the light-concentrating portion 111 corresponding to each of the red sub-pixel 131r, green sub-pixel 131g, and blue sub-pixel 131b can be the same. Similarly, the size and refractive index of the inner cladding portion 114 and outer core portion 115 within the light-concentrating portion 111 corresponding to each of the red sub-pixel 131r, green sub-pixel 131g, and blue sub-pixel 131b can also be the same. Meanwhile, the size of the light-concentrating portion 111 corresponding to each sub-pixel 131 must still meet the aforementioned size conditions, and the refractive index of the light-concentrating portion 111 corresponding to each sub-pixel 131 must also meet the aforementioned size conditions. This configuration simplifies the structure of the light-concentrating layer 11, thereby reducing the manufacturing difficulty and production cost.

[0051] This application embodiment provides another display panel 10, such as Figure 5 As shown, the difference between this display panel 10 and the display panel 10 in the above embodiment is that the display panel 10 in this embodiment has a bottom-emitting structure. Other structures of this display panel 10 can be found in [reference needed]. Figures 2 to 4 The content shown.

[0052] In this embodiment, since the display panel 10 has a bottom-emitting structure, the first electrode is the anode 14, and the light-emitting side of the display panel 10 is the side of the display panel 10 facing the anode 14 from the light-emitting layer 13. Therefore, the light-concentrating layer 11 is located on the side of the anode 14 away from the light-emitting layer 13, and the light-concentrating layer 11 is located on the side of the driving array layer 21 away from the light-emitting layer 13. The light-concentrating layer 11 is formed after coating the substrate 22 with photoresist, exposure, development, and etching processes. It should be noted that although... Figure 5 The light-concentrating layer 11 is formed by processing the substrate 22. However, the light-concentrating layer 11 can also be another film layer on the side of the substrate 22 away from the light-emitting layer 13.

[0053] In this embodiment, the light-concentrating layer 11, located on the side of the anode 14 away from the light-emitting layer 13 and on the light-emitting side of the display panel 10, can prevent the light emitted by the light-emitting layer 13 that is not perpendicularly incident on the light-concentrating layer 11 from spreading outwards and instead converge towards the center, ultimately converging into the portion of the inner core 113 located within the regular hexagon 23. Thus, the light emitted by each sub-pixel 131 can be further converged by the light-concentrating part 111, and these lights can leave the display panel 10 from the light-emitting side of the display panel 10 in a direction perpendicular to the display panel 10. In this way, the front light emission efficiency of the display panel 10 can be further improved.

[0054] This application also provides a display device, including any of the above-described display panels 10.

[0055] The above embodiments of this application can complement each other without causing conflict.

[0056] It should be noted that the dimensions of layers and regions may be exaggerated in the accompanying drawings for clarity. Furthermore, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be intermediate layers. Additionally, it is understood that when an element or layer is referred to as being "below" another element or layer, it can be directly below the other element, or there may be more than one intermediate layer or element. Furthermore, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Similar reference numerals throughout indicate similar elements.

[0057] The term “multiple” means two or more, unless otherwise expressly defined.

[0058] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0059] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A display panel, characterized by, The display panel has a light-outgoing side, which is a side of the display panel for outgoing light; The display panel comprises a light-emitting layer, a first electrode located at one side of the light-emitting layer, and a light-concentrating layer located at a side of the first electrode away from the light-emitting layer and at the light-outgoing side of the display panel; The light-concentrating layer comprises an outer-enclosing part and light-concentrating parts; in the plane where the light-concentrating layer is located, the outer-enclosing part encloses at least three light-concentrating parts; the light-concentrating part comprises an inner-enclosing part, an outer-core part, and an inner-core part; in the plane where the light-concentrating layer is located, the outer-enclosing part, the inner-enclosing part, the outer-core part, and the inner-core part do not overlap with each other; the outer-enclosing part encloses at least three inner-core parts; the light-emitting layer comprises at least three sub-pixels, and the orthographic projection of each sub-pixel on the first electrode is located within the orthographic projection of one inner-core part on the first electrode; each inner-core part encloses at least three inner-enclosing parts; in each inner-core part, at least three inner-enclosing parts are arranged in an array around the center of the inner-core part; the inner-enclosing part encloses the outer-core part; The refractive index of the outer-enclosing part is greater than the refractive index of the inner-core part and the outer-core part; the refractive index of the inner-enclosing part is greater than the refractive index of the inner-core part and the outer-core part; The wavelength of the light emitted by the sub-pixel is λ; the anti-resonance period of the light-concentrating part is L; the refractive index of the inner-core part and the outer-core part is n1; the refractive index of the outer-enclosing part and the inner-enclosing part is n2; The size and refractive index of the light-concentrating part satisfy the relationship: 0.5λ≤2*L*√(n1^2-n2^2)≤1.5λ.

2. The display panel of claim 1, wherein, The light-concentrating layer further comprises a first-level outer-core part and a first-level inner-enclosing layer; each outer-core part encloses at least one first-level inner-enclosing layer, and the first-level inner-enclosing layer encloses the first-level outer-core part.

3. The display panel of claim 2, wherein, The light-concentrating layer further comprises an m-level outer-core part and an m-level inner-enclosing layer; each (m-1)-level outer-core part encloses at least one m-level inner-enclosing layer, and the m-level inner-enclosing layer encloses the m-level outer-core part, where m is an integer greater than or equal to 2.

4. The display panel of claim 3, wherein, The shape of the boundary between the (m-1)-level outer-core part and the m-level inner-enclosing layer comprises a circle or an ellipse; the shape of the boundary between the m-level inner-enclosing layer and the m-level outer-core part comprises a circle or an ellipse.

5. The display panel of claim 1, wherein, The shape of the boundary between the inner-core part and the outer-enclosing part comprises a circle or an ellipse; the shape of the boundary between the inner-core part and the inner-enclosing part comprises a circle or an ellipse; the shape of the boundary between the inner-enclosing part and the outer-core part comprises a circle or an ellipse.

6. The display panel of claim 5, wherein, When the shape of the boundary between the inner-core part and the inner-enclosing part is an ellipse, and the shape of the boundary between the inner-enclosing part and the outer-core part is also an ellipse, the major axis of the ellipse is directed away from the center of the inner-core part.

7. The display panel of claim 1, wherein, In the plane where the light-concentrating layer is located, the width of the outer-core part is greater than or equal to 6 microns and less than or equal to 10 microns; the width of the inner-enclosing part is greater than or equal to 2 microns and less than or equal to 4 microns. The distance between the inner package part and the outer package part is greater than or equal to 0 microns and less than or equal to 4 microns in a direction away from the center of the inner core part.

8. The display panel of claim 1, wherein, The refractive index of the inner core part and the outer core part is greater than or equal to 1.4 and less than or equal to 1.6; the refractive index of the outer package part and the inner package part is greater than or equal to 1.6 and less than or equal to 1.

8.

9. The display panel of claim 1, wherein, The light-emitting layer comprises red, green and blue sub-pixels; the width of the light collecting part corresponding to the red sub-pixel is greater than 30 microns, the width of the light collecting part corresponding to the green sub-pixel is greater than 20 microns, and the width of the light collecting part corresponding to the blue sub-pixel is greater than 40 microns.

10. The display panel of any of claims 8-9, wherein, The size and refractive index of the light collecting part corresponding to different sub-pixels are the same.

11. A display device comprising: A display panel comprising any one of claims 1-10.

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