Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a substrate which comprises a plurality of light-emitting areas and non-light-emitting areas located between the adjacent light-emitting areas; the pixel defining layer is located on the substrate and provided with a main body part and a plurality of openings defined by the main body part, and the openings are configured to define at least one of the light emitting areas; the first structure layer is at least located in one light-emitting area; and the second structure layer is at least located in the non-light-emitting area, the first structure layer has a first refractive index, the second structure layer has a second refractive index, and the first refractive index is larger than the second refractive index.

Description

Display panel and display device Technical Field

[0001] Embodiments of the present disclosure relate to a display panel and a display device. Background Art

[0002] Display panels, such as organic light-emitting diodes (OLEDs) or quantum dot light-emitting diodes (QLEDs), have been increasingly used in various display devices such as mobile phones, tablets, computers, and televisions due to their self-luminous characteristics.

[0003] Summary of the Invention

[0004] Embodiments of the present disclosure provide a display panel and a display device.

[0005] An embodiment of the present disclosure provides a display panel, comprising: a base substrate, comprising a plurality of light-emitting areas and a non-light-emitting area located between adjacent light-emitting areas; a pixel defining layer, located on the base substrate, having a main body and a plurality of openings defined by the main body, wherein the opening is configured to define at least one of the plurality of light-emitting areas; a first structural layer, located at least in one of the plurality of light-emitting areas; and a second structural layer, located at least in the non-light-emitting area, wherein the first structural layer has a first refractive index, the second structural layer has a second refractive index, and the first refractive index is greater than the second refractive index.

[0006] For example, the second structure layer is located on the main body, and the first structure layer fills a space defined by the second structure layer.

[0007] For example, the orthographic projection of the second structure layer on the base substrate falls within the orthographic projection of the main body on the base substrate.

[0008] For example, the first structural layer includes a matrix layer and filling particles located in the matrix layer, and the refractive index of the filling particles is greater than the refractive index of the matrix layer.

[0009] For example, the base layer is made of acrylic material, and the second structural layer is made of acrylic material.

[0010] For example, the particle size of the filler particles is at the nanometer level.

[0011] For example, a surface of the first structure layer facing away from the base substrate has a concave-convex structure.

[0012] For example, the display panel further includes an adhesive layer, and the adhesive layer covers the first structural layer and the second structural layer.

[0013] For example, the adhesive layer is in contact with the first structural layer.

[0014] For example, the area of ​​the first structure layer is not less than the area of ​​the light-emitting region, and the side surface of the first structure layer contacts the side surface of the second structure layer.

[0015] For example, the display panel further includes a cover plate, and the cover plate is in contact with the first structural layer and the second structural layer.

[0016] For example, the main body has a groove, the second structure layer fills the groove and protrudes from the main body.

[0017] For example, the display panel further includes an adhesive layer and a cover plate, the cover plate is bonded to the base substrate via the adhesive layer, and the refractive index of the adhesive layer is greater than the second refractive index.

[0018] For example, a ratio of a maximum dimension of a portion of the second structural layer protruding from the main body portion to a maximum thickness of the main body portion is greater than or equal to 1:2 and less than or equal to 3:2.

[0019] For example, the first structure layer is located in the light-emitting area and the non-light-emitting area, the second structure layer is located in the light-emitting area and the non-light-emitting area, and the first structure layer is closer to the base substrate than the second structure layer.

[0020] For example, the display panel further includes a lens layer, and the lens layer is located between the first structure layer and the second structure layer.

[0021] For example, the lens layer includes a plurality of lens groups, each lens group includes a plurality of lens units, and the orthographic projections of the plurality of lens units on the base substrate overlap with the orthographic projection of the opening on the base substrate.

[0022] For example, the thickness of the first structural layer is greater than 5 μm.

[0023] For example, the thickness of the first structural layer is less than or equal to 20 μm.

[0024] For example, the side surface of the main body has a stepped shape, and the second structure layer covers the side surface and the top surface of the main body.

[0025] For example, the main body has a first body and a second body, a step is provided between the first body and the second body, the first body is closer to the base substrate than the second body, and the first structure layer at least fills the space defined by the second body.

[0026] For example, the display panel further includes an intermediate film layer located between the first structural layer and the second structural layer, wherein the refractive index of the intermediate film layer is greater than the second refractive index and greater than or equal to the first refractive index.

[0027] An embodiment of the present disclosure further provides a display device, comprising any of the above-mentioned display panels. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, rather than limiting the present disclosure.

[0029] FIG1 is a plan view of a display panel provided by an embodiment of the present disclosure.

[0030] FIG2 is a cross-sectional view of a display panel provided by an embodiment of the present disclosure.

[0031] 3A to 3D are cross-sectional views of a display panel provided by an embodiment of the present disclosure.

[0032] FIG4 is a cross-sectional view of a display panel provided by an embodiment of the present disclosure.

[0033] FIG5 is a cross-sectional view of a display panel provided by an embodiment of the present disclosure.

[0034] FIG6 is a cross-sectional view of a display panel provided by an embodiment of the present disclosure.

[0035] FIG7 is a cross-sectional view of a display panel provided by an embodiment of the present disclosure.

[0036] FIG8A is a cross-sectional view of a display panel provided by an embodiment of the present disclosure.

[0037] FIG8B is a cross-sectional view of a display panel provided by another embodiment of the present disclosure.

[0038] 9 to 12 illustrate a method for manufacturing the second structure layer in the display panel shown in FIG. 7 , FIG. 8A , and FIG. 8B .

[0039] FIG13 is a cross-sectional view of a display panel provided by an embodiment of the present disclosure.

[0040] FIG14 is a cross-sectional view of a display panel provided by an embodiment of the present disclosure.

[0041] FIG15 is a plan view of a display panel provided by an embodiment of the present disclosure.

[0042] FIG16 is a cross-sectional view of a display panel provided by another embodiment of the present disclosure.

[0043] FIG17 is a cross-sectional view of another display panel provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0045] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by persons of ordinary skill in the field to which this disclosure belongs. The words "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0046] Making display panels highly efficient is a goal that has been pursued. Currently, improvements are mainly made by optimizing the materials and structures of the light-emitting functional layer. However, as efficiency increases, the room for optimization of materials and structures becomes smaller and smaller. Therefore, how to further improve efficiency has become an urgent problem that needs to be solved.

[0047] Display panels that emit white light from medium- and large-sized light-emitting elements often achieve full-color display by passing white light through a color filter cover. However, during the display process, pixel crosstalk can easily occur due to the effects of gaps and alignment, resulting in abnormal display colors. Therefore, how to reduce crosstalk has become a problem that needs to be solved.

[0048] Conventional light-emitting functional layers improve optical efficiency through structural and material upgrades, but this is becoming increasingly costly and challenging to develop. Improving optical performance within conventional architectures, while also addressing related crosstalk issues and enhancing display quality, has become a pressing challenge.

[0049] The embodiments of the present disclosure, through structural design, effectively improve light extraction efficiency and alleviate pixel crosstalk without changing the structure of the light-emitting functional layer and the backplane, thereby enhancing product performance and competitiveness.

[0050] The embodiments of the present disclosure design a light extraction structure of a light-emitting element by performing structural design and material matching on a packaging structure, which can easily improve light extraction efficiency and alleviate crosstalk problems.

[0051] FIG1 is a plan view of a display panel provided by an embodiment of the present disclosure. As shown in FIG1 , the display panel includes a plurality of sub-pixels 100. FIG1 illustrates an example in which a plurality of sub-pixels 100 are arranged in an array. Of course, the arrangement of the plurality of sub-pixels 100 is not limited to that shown in the figure. The shape and size of the sub-pixel 100 are also not limited to those shown in the figure. For example, the sub-pixel 100 can emit red, green, blue or white light as needed, and of course, it can also emit light of other colors depending on the situation. FIG1 illustrates the sub-pixel 100 by its light-emitting area. The sub-pixel 100 shown in FIG1 is the light-emitting area of ​​the light-emitting element.

[0052] Figure 2 is a cross-sectional view of a display panel provided in accordance with an embodiment of the present disclosure. As shown in Figures 1 and 2, the display panel includes a pixel-defining layer (PDL). As shown in Figure 1, the pixel-defining layer (PDL) includes a main portion (MP) and a plurality of openings (OPNs) defined by the main portion (MP). The openings (OPNs) are configured to define a light-emitting region (R1). As shown in Figures 1 and 2, the openings (OPNs) are configured to define the light-emitting region (R1) of a sub-pixel (100). For example, the openings (OPNs) are configured to define at least one of the plurality of light-emitting regions (R1) of a sub-pixel (100).

[0053] Figures 1 and 2 also illustrate a non-luminous region R2. This non-luminous region R2 is located between adjacent luminous regions R1. As shown in Figures 1 and 2, the luminous region R1 corresponds to the opening OPN of the pixel-defining layer (PDL), while the non-luminous region R2 corresponds to the area of ​​the pixel-defining layer (PDL) other than the opening OPN, such as, but not limited to, the main body MP. For example, the non-luminous region R2 corresponds to the top surface of the main body MP, while the luminous region R1 corresponds to the top surface of the opening OPN, but not limited to this. For example, in the embodiments of the present disclosure, both the luminous region R1 and the non-luminous region R2 are defined by the pixel-defining layer (PDL).

[0054] As shown in FIG. 1 and FIG. 2 , the non-luminescent area R2 and the plurality of luminescent areas R1 together constitute a picture display area.

[0055] In some figures of the embodiments of the present disclosure, the plan views show directions X and Y, and the cross-sectional views show direction Z. Directions X and Y are both directions parallel to the main surface of the substrate BS. Direction Z is a direction perpendicular to the main surface of the substrate BS. For example, directions X and Y intersect. The embodiments of the present disclosure are described using the example where directions X and Y are perpendicular. For example, the main surface of the substrate BS is the surface of the substrate BS used to manufacture various components. In the cross-sectional view, the upper surface of the substrate BS is the main surface of the substrate BS. Direction Z is perpendicular to direction X and to direction Y.

[0056] As shown in FIG. 2 , the display panel includes a base substrate BS and a pixel defining layer PDL located on the base substrate BS.

[0057] As shown in Figure 2, the display panel further includes a first structure layer 101. The first structure layer 101 is located in at least one light emitting region R1. For example, the first structure layer 101 is located in at least a plurality of light emitting regions R1.

[0058] As shown in FIG. 2 , the display panel further includes a second structure layer 102 , and the second structure layer 102 is located in the non-luminescent region R2 .

[0059] As shown in FIG. 2 , the first structure layer 101 has a first refractive index n1 , and the second structure layer 102 has a second refractive index n2 . The first refractive index n1 is greater than the second refractive index n2 .

[0060] FIG. 2 shows a light emitting functional layer EML, omitting the first electrode and the second electrode disposed on both sides of the light emitting functional layer EML.

[0061] In the display panel provided by the embodiment of the present disclosure, when the light emitted by the light-emitting element is incident on the first structure layer 101 and then on the second structure layer 102, because the first refractive index n1 is greater than the second refractive index n2, the light that passes through the first structure layer 101 and then enters the second structure layer 102 is totally reflected. As a result, the light reflected by the second structure layer 102 travels in a direction close to the center line (vertical center line) of the light-emitting element, thereby effectively improving the light extraction efficiency and improving the pixel crosstalk problem.

[0062] For example, as shown in FIG. 2 , the thickness of the second structure layer 102 is in the range of 1-10 μm, but is not limited thereto.

[0063] For example, as shown in FIG. 2 , the thickness of the first structure layer 101 is in the range of 1-10 μm, but is not limited thereto.

[0064] For example, as shown in FIG. 2 , the thickness of the main portion MP of the pixel defining layer PDL is in the range of 1-2 μm, but is not limited thereto.

[0065] For example, in some embodiments, to improve light extraction efficiency, the thickness of the first structure layer 101 is greater than that of the second structure layer 102 , and the thickness of the second structure layer 102 is greater than that of the main body MP.

[0066] 3A to 3D are cross-sectional views of a display panel provided by an embodiment of the present disclosure.

[0067] As shown in Figures 2 and 3A to 3D, the second structure layer 102 is located on the main body MP. To facilitate total internal reflection, the first structure layer 101 fills the space defined by the second structure layer 102. For example, the second structure layer 102 being located on the main body MP means that the second structure layer 102 is located above the main body MP, and the orthographic projection of the second structure layer 102 on the base substrate BS falls within the orthographic projection of the main body MP on the base substrate BS, including the case where the orthographic projection of the second structure layer 102 on the base substrate BS overlaps with the orthographic projection of the main body MP on the base substrate BS.

[0068] As shown in FIG. 2 and FIG. 3A to FIG. 3D , in order to facilitate manufacturing, the top surface of the first structure layer 101 does not exceed the second structure layer 102 in a direction perpendicular to the base substrate BS.

[0069] For example, as shown in FIG. 2 and FIG. 3A to FIG. 3D , the orthographic projection of the second structure layer 102 on the base substrate BS falls within the orthographic projection of the main body portion MP on the base substrate BS.

[0070] For example, as shown in FIG3D , the first structural layer 101 includes a base layer BL and filler particles PT located in the base layer BL. For example, the particle size of the filler particles PT is at the nanometer level. The second structural layer 102 can be formed using an inkjet printing process. The refractive index of the filler particles PT is greater than that of the base layer BL. For example, the filler particles PT can also be referred to as high-refractive particles. By providing filler particles PT with a high refractive index in the base layer BL, the refractive index of the first structural layer 101 can be greater than that of the base layer BL and less than that of the filler particles PT. The greater the amount of filler particles PT, the greater the refractive index of the first structural layer 101.

[0071] For example, as shown in FIG3D , the filling particles PT may include nano-zirconia particles, but are not limited thereto and may be selected as needed.

[0072] The material of the base layer BL of the first structure layer 101 can be the same as that of the second structure layer 102. For example, the material of the base layer BL of the first structure layer 101 includes an acrylic material, and the material of the second structure layer 102 includes an acrylic material. Of course, the material of the base layer BL of the first structure layer 101 can also be different from that of the second structure layer 102.

[0073] For example, as shown in Figure 3D , the surface of the first structure layer 101 facing away from the base substrate BS has a concavo-convex structure. As shown in Figure 3D , the upper surface of the first structure layer 101 has a concavo-convex structure. Due to the presence of filler particles PT in the first structure layer 101, the surface of the first structure layer 101 facing away from the base substrate BS has a concavo-convex structure. On the surface of the first structure layer 101 facing away from the base substrate BS, the filler particles PT protrude from the base layer BL, forming protrusions. The spaces between the filler particles PT protruding from the base layer BL form depressions. Because the filler particles PT have a nanometer-scale particle size, the concavo-convex structure also has a nanometer-scale particle size.

[0074] For example, as shown in Figures 2 and 3A to 3D, the refractive index of the second structure layer 102 (the second refractive index n2) is less than or equal to 1.5, the refractive index of the first structure layer 101 (the first refractive index n1) is greater than or equal to 1.5, and the first refractive index n1 is greater than the second refractive index n2. For example, the second structure layer 102 is made of an acrylic material, and the refractive index of the second structure layer 102 (the second refractive index n2) is approximately 1.5, and the first structure layer 101 is made of an acrylic material with filler particles PT, and the refractive index of the first structure layer 101 (the first refractive index n1) is approximately 1.57, but the present invention is not limited thereto.

[0075] Of course, in other embodiments, the second structural layer 102 may be made of acrylic material, and the first structural layer 101 may be made of epoxy resin or epoxy resin filled with PT particles. The refractive index of epoxy resin is about 1.5-1.57, and the refractive index of epoxy resin filled with PT particles may be greater than 1.6.

[0076] For example, as shown in FIG2 and FIG3A to FIG3D , the display panel further includes a bonding layer FL. The bonding layer FL is configured to bond the array substrate AS and the cover plate CV.

[0077] For example, as shown in FIG. 2 and FIG. 3A to FIG. 3D , the adhesive layer FL covers the first structure layer 101 and the second structure layer 102 .

[0078] For example, as shown in Figures 2 and 3A to 3D, the refractive index of the bonding layer FL is greater than or equal to the refractive index (second refractive index n2) of the second structural layer 102, and less than or equal to the refractive index (first refractive index n1) of the first structural layer 101. For example, the refractive index of the bonding layer FL is greater than or equal to 1.5 and less than or equal to 1.57.

[0079] For example, as shown in FIG. 2 and FIG. 3A to FIG. 3D , the adhesive layer FL is in contact with the first structural layer 101 .

[0080] 2 and 3A to 3D, the material of the bonding layer FL is different from that of the first structural layer 101 and the second structural layer 102. For example, the material of the bonding layer FL includes epoxy resin (refractive index of approximately 1.50-1.57), but is not limited thereto.

[0081] In some embodiments, the second structural layer 102 may be made of acrylic material (refractive index is approximately 1.48-1.50), the first structural layer 101 is made of acrylic material with filling particles PT (refractive index is greater than or equal to 1.50 and greater than the refractive index of the second structural layer 102), and the bonding layer FL is made of epoxy resin (refractive index is approximately 1.50-1.57).

[0082] In other embodiments, the second structural layer 102 may be made of acrylic material (refractive index of approximately 1.48-1.50), the first structural layer 101 may be made of epoxy resin (refractive index of approximately 1.50-1.57) or epoxy resin with filled particles PT (refractive index greater than 1.6), and the bonding layer FL may be made of epoxy resin (refractive index of approximately 1.50-1.57).

[0083] For example, as shown in FIG. 2 , FIG. 3A , and FIG. 3C to FIG. 3D , the adhesive layer FL is in contact with the first structure layer 101 and in contact with the second structure layer 102 .

[0084] Figures 3A to 3D illustrate a light-emitting element (EMC). The light-emitting element (EMC) includes a first electrode (E1), a second electrode (E2), and a light-emitting functional layer (EML) located between the first electrode (E1) and the second electrode (E2). An opening (OPN) is configured to expose a portion of the first electrode (E1). Each sub-pixel (100) includes one first electrode (E1). For example, the light-emitting element (EMC) includes an OLED or a QLED, but is not limited thereto.

[0085] For example, the light-emitting functional layer (EML) includes multiple film layers, such as a light-emitting layer (light-emitting material layer). The light-emitting functional layer may also include at least one of a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer. The organic light-emitting functional layer can be selected as needed. At least one film layer in the light-emitting functional layer can be produced using an evaporation or inkjet printing process.

[0086] As shown in FIG. 3A to FIG. 3D , the plurality of first electrodes E1 are separated from each other to be configured to input signals respectively.

[0087] 3B to 3D illustrate an encapsulation layer ECS, which is configured to encapsulate the light emitting element EMC to prevent water and oxygen from invading.

[0088] Figure 4 is a cross-sectional view of a display panel provided in accordance with an embodiment of the present disclosure. Figure 5 is a cross-sectional view of a display panel provided in accordance with an embodiment of the present disclosure. Figure 6 is a cross-sectional view of a display panel provided in accordance with an embodiment of the present disclosure.

[0089] For example, as shown in Figures 4 and 5, a display panel includes a base substrate BS and a pixel-defining layer (PDL) located on the base substrate BS. The display panel has a non-emission region R2 and an emission region R1, with the non-emission region R2 located between adjacent emission regions R1. The emission region R1 is defined by the pixel-defining layer (PDL).

[0090] As shown in Figures 4 and 5, the display panel further includes a first structural layer 101, which is located at least in the plurality of light-emitting regions R1. The display panel further includes a second structural layer 102, which is located in the non-light-emitting regions R2. The first structural layer 101 has a first refractive index n1, and the second structural layer 102 has a second refractive index n2, where the first refractive index n1 is greater than the second refractive index n2.

[0091] For example, as shown in Figures 4 and 5, the area of ​​the orthographic projection of the first structure layer 101 on the base substrate BS is no less than the area of ​​the orthographic projection of the light-emitting region R1 on the base substrate BS, and the side surface of the first structure layer 101 contacts the side surface of the second structure layer 102. Therefore, when light emitted by the light-emitting element passes through the first structure layer 101 and is irradiated at the interface between the first structure layer 101 and the second structure layer 102, total internal reflection occurs because the first refractive index n1 is greater than the second refractive index n2. As a result, the light reflected by the second structure layer 102 travels toward the center line of the light-emitting element, thereby effectively improving light extraction efficiency and improving pixel crosstalk.

[0092] For example, as shown in FIG. 4 and FIG. 5 , the first refractive index n1 of the first structure layer 101 is greater than 1.50, and the refractive index (second refractive index n2 ) of the second structure layer 102 is less than or equal to 1.50.

[0093] For example, as shown in Figures 4 and 5, the material of the first structural layer 101 is different from the material of the second structural layer 102. For example, the material of the first structural layer 101 includes epoxy resin, but is not limited thereto. For example, the first refractive index n1 of the first structural layer 101 is approximately 1.50-1.57. For example, the material of the second structural layer 102 includes acrylic material. For example, the second refractive index n2 of the second structural layer 102 is approximately 1.48-1.50.

[0094] For example, as shown in Figures 4 and 5, in some embodiments, the material of the first structural layer 101 includes epoxy resin (refractive index greater than 1.6) with filler particles, and the material of the second structural layer 102 includes acrylic material (refractive index of approximately 1.48-1.50). For details about the filler particles, please refer to the previous description and will not be repeated here.

[0095] For example, as shown in FIG. 4 and FIG. 5 , the display panel further includes a cover plate CV, and the cover plate CV is in contact with the first structure layer 101 and the second structure layer 102 .

[0096] 4 and 5 , in order to improve light extraction efficiency, the first structure layer 101 completely covers the light emitting region R1 . The orthographic projection of the first structure layer 101 on the base substrate completely covers the orthographic projection of the light emitting region R1 on the base substrate.

[0097] 5 shows an encapsulation layer ECS, which is configured to encapsulate the light emitting element EMC to prevent water and oxygen from invading.

[0098] FIG5 shows that the interface between the first structure layer 101 and the second structure layer 102 includes a plane. However, the interface between the first structure layer 101 and the second structure layer 102 may be in other forms. For example, the interface between the first structure layer 101 and the second structure layer 102 may be arc-shaped or have an inclined angle.

[0099] For example, as shown in FIG6 , the cross section of the first structure layer 101 is an inverted trapezoid.

[0100] In the display panel shown in FIG6 , at least one of the first structural layer 101 and the second structural layer 102 can also serve as an adhesive layer FL. The bonding between the array substrate AS and the cover plate CV is achieved by at least one of the first structural layer 101 and the second structural layer 102 (serving as the adhesive layer FL). For example, one of the first structural layer 101 and the second structural layer 102 may not have adhesive properties, while the other may have adhesive properties. For example, adhesive properties may be imparted by adding additives to the base material. Of course, the base material itself may also have adhesive properties.

[0101] As shown in FIG. 6 , in order to further avoid pixel crosstalk and improve display effects, the slope angle A1 of the main portion MP of the pixel defining layer PDL is smaller than the slope angle A2 of the second structure layer 102 .

[0102] For example, as shown in Figure 6, in order to have more light be totally reflected to improve the light extraction efficiency, the thickness of the first structure layer 101 is greater than the thickness of the main body MP of the pixel defining layer PDL, and the thickness of the second structure layer 102 is greater than the thickness of the main body MP of the pixel defining layer PDL.

[0103] For example, as shown in FIG6 , the thickness of the first structure layer 101 is in the range of 5-25 μm, but is not limited thereto.

[0104] For example, as shown in FIG. 6 , the thickness of the second structure layer 102 is in the range of 5-25 μm, but is not limited thereto.

[0105] For example, as shown in FIG. 6 , the thickness of the first structure layer 101 may be equal to the thickness of the first structure layer 101 .

[0106] For example, as shown in FIG. 6 , the thickness of the main portion MP of the pixel defining layer PDL is in the range of 1-2 μm, but is not limited thereto.

[0107] Figure 7 is a cross-sectional view of a display panel provided in accordance with one embodiment of the present disclosure. Figure 8A is a cross-sectional view of a display panel provided in accordance with one embodiment of the present disclosure. Figure 8B is a cross-sectional view of a display panel provided in accordance with another embodiment of the present disclosure.

[0108] For example, as shown in Figures 7, 8A, and 8B, a display panel includes a base substrate BS and a pixel-defining layer (PDL) located on the base substrate BS. The display panel has a non-emission region R2 and an emission region R1, with the non-emission region R2 located between adjacent emission regions R1. The emission region R1 is defined by the pixel-defining layer (PDL).

[0109] As shown in Figures 7, 8A, and 8B, the display panel further includes a first structure layer 101, which is located at least in the plurality of light-emitting regions R1. The display panel further includes a second structure layer 102, which is located in the non-light-emitting regions R2. The first structure layer 101 has a first refractive index n1, and the second structure layer 102 has a second refractive index n2, where the first refractive index n1 is greater than the second refractive index n2.

[0110] As shown in FIG. 7 , FIG. 8A and FIG. 8B , the main body portion MP has a groove GR. The second structure layer 102 fills the groove GR and protrudes from the main body portion MP.

[0111] For example, as shown in Figures 7, 8A and 8B, when the light emitted by the light-emitting element EMC passes through the first structural layer 101 and is irradiated onto the second structural layer 102, total reflection occurs on the surface of the second structural layer 102. As a result, the light reflected by the second structural layer 102 travels toward a direction close to the center line of the light-emitting element, thereby effectively improving the light extraction efficiency and improving the pixel crosstalk problem.

[0112] 7 , 8A and 8B further illustrate an encapsulation layer ECS, which is configured to encapsulate the light emitting element EMC to prevent water and oxygen from invading.

[0113] As shown in FIG. 8A and FIG. 8B , the first structural layer 101 also serves as the adhesive layer FL.

[0114] For example, as shown in Figures 7, 8A, and 8B, the material of the second structural layer 102 includes an acrylic material (refractive index of approximately 1.48-1.50), and the material of the first structural layer 101 includes an epoxy resin (refractive index of approximately 1.50-1.57), but the present invention is not limited thereto. For example, as shown in Figures 7, 8A, and 8B, the first refractive index n1 of the first structural layer 101 is approximately 1.50-1.57, and the second refractive index n2 of the second structural layer 102 is approximately 1.48-1.50.

[0115] Of course, in other embodiments, the material of the second structural layer 102 includes an acrylic material (refractive index of approximately 1.48-1.50), and the material of the first structural layer 101 includes an epoxy resin with filler particles (refractive index greater than 1.6). The filler particles can be found in the previous description and will not be repeated here.

[0116] For example, as shown in Figures 7, 8A, and 8B, the display panel further includes an adhesive layer FL and a cover plate CV. The cover plate CV is bonded to the base substrate BS via the adhesive layer FL, and the adhesive layer FL has a refractive index greater than the second refractive index. For example, the cover plate CV may be a color filter substrate, but is not limited thereto. For example, the cover plate CV includes a base substrate and a color filter layer disposed on the base substrate. As shown in Figures 7, 8A, and 8B, the first structural layer 101 may serve as the adhesive layer FL.

[0117] As shown in FIG8A , the second structure layer 102 is formed after the second electrode E2 is formed. Compared with the display panel shown in FIG8A , the second electrode E2 is formed after the second structure layer 102 is formed in the display panel shown in FIG8B . As shown in FIG8B , the second electrode E2 covers the second structure layer 102.

[0118] As shown in Figures 7, 8A, and 8B, to further improve light extraction efficiency and mitigate pixel crosstalk, the ratio of the maximum dimension S1 (shown in Figure 7) of the portion of the second structure layer 102 protruding from the main portion MP to the maximum thickness of the main portion MP is greater than or equal to 1:2 and less than or equal to 3:2. For another example, the ratio of the maximum dimension S1 (shown in Figure 7) of the portion of the second structure layer 102 protruding from the main portion MP to the maximum thickness of the main portion MP is greater than or equal to 1:2 and less than or equal to 1:1.

[0119] For example, as shown in FIG. 8A and FIG. 8B , the thickness of the first structure layer 101 is in the range of 5-25 μm, but is not limited thereto.

[0120] For example, as shown in FIG. 8A and FIG. 8B , the thickness of the second structure layer 102 is in the range of 1-10 μm, but is not limited thereto.

[0121] For example, as shown in FIG. 8A and FIG. 8B , the thickness of the main portion MP of the pixel defining layer PDL is in the range of 1-2 μm, but is not limited thereto.

[0122] 9 to 12 illustrate a method for manufacturing the second structure layer in the display panel shown in FIG. 7 , FIG. 8A , and FIG. 8B .

[0123] As shown in Fig. 9 , a pixel defining layer PDL is formed on a base substrate BS. Fig. 9 shows a main body MP and an opening OPN of the pixel defining layer PDL. The main body MP has a groove GR.

[0124] As shown in FIG. 10 , a light emitting functional layer EML is formed at the opening OPN.

[0125] 11 , the groove GR is filled with an expandable material M0. The expandable material M0 may be formed in the groove GR through an inkjet printing process.

[0126] As shown in FIG. 12 , a heating process is performed to expand the expandable material M0 to obtain a second structural layer 102 . The second structural layer 102 protrudes from the main body MP.

[0127] For example, in order to avoid affecting other structures such as the light-emitting functional layer (EML) during the heating process, the heating temperature during the heating process is not higher than 120°C. For example, the heating temperature is greater than or equal to 100°C, that is, the heating temperature is greater than or equal to 100°C and less than 120°C. For another example, the heating temperature is greater than or equal to 110°C, that is, the heating temperature is greater than or equal to 110°C and less than 120°C.

[0128] For example, the expandable material M0 includes an acrylic material, wherein the refractive index of the acrylic material is about 1.48-1.50.

[0129] For example, after forming the light-emitting functional layer EML and the second electrode E2, the groove GR may be filled with an expandable material M0 (as shown in FIG11 ). In this case, the display panel shown in FIG8A may be formed. For example, the groove GR may be filled with expandable material M0, and a heating process may be performed to expand the expandable material M0 to obtain the second structural layer 102. The light-emitting functional layer EML and the second electrode E2 may then be formed. In this case, the display panel shown in FIG8B may be formed. The second electrode E2 is not shown in FIG10 to FIG12 . The second electrode E2 can be seen in FIG8A and FIG8B .

[0130] Figure 13 is a cross-sectional view of a display panel provided in accordance with an embodiment of the present disclosure. Figure 14 is a cross-sectional view of a display panel provided in accordance with an embodiment of the present disclosure. Figure 15 is a plan view of a display panel provided in accordance with an embodiment of the present disclosure.

[0131] For example, as shown in Figures 13 and 14, a display panel includes a base substrate BS and a pixel-defining layer PDL located on the base substrate BS. The display panel has a non-emission region R2 and an emission region R1, wherein the non-emission region R2 is located between adjacent emission regions R1. The emission region R1 is defined by the pixel-defining layer PDL.

[0132] As shown in Figures 13 and 14, the display panel further includes a first structural layer 101, which is located at least in the plurality of light-emitting regions R1. The display panel further includes a second structural layer 102, which is located in the non-light-emitting regions R2. The first structural layer 101 has a first refractive index n1, and the second structural layer 102 has a second refractive index n2, where the first refractive index n1 is greater than the second refractive index n2.

[0133] For example, as shown in Figures 13 and 14, the light emitted by the light-emitting element EMC passes through the first structural layer 101 and is irradiated to the lens layer 103. The lens layer 103 produces a focusing effect, changes the direction of the lateral light, enhances the forward light, effectively improves the light extraction efficiency, and improves the pixel crosstalk problem.

[0134] For example, as shown in Figures 13 and 14, the first structure layer 101 is located in the light-emitting area R1 and the non-light-emitting area R2, the second structure layer 102 is located in the light-emitting area R1 and the non-light-emitting area R2, and the first structure layer 101 is closer to the base substrate BS than the second structure layer 102.

[0135] For example, as shown in Figure 14 , the display panel further includes an encapsulation layer ECS, which is configured to encapsulate the light emitting element EMC to prevent water and oxygen from invading. For example, as shown in Figure 14 , the first structure layer 101 is located on the encapsulation layer ECS.

[0136] For example, as shown in FIG. 14 , the first structure layer 101 is in contact with the encapsulation layer ECS.

[0137] For example, as shown in FIG. 14 , the first structural layer 101 can be manufactured by spin coating, inkjet printing, slit coating, and other processes.

[0138] For example, as shown in FIG. 14 , the refractive index of the first structure layer 101 (the first refractive index n1 ) is greater than 1.6. For further example, the refractive index of the first structure layer 101 (the first refractive index n1 ) is greater than 1.7.

[0139] For example, as shown in FIG14 , the first structural layer 101 may be provided with filling particles, and the filling particles may include zirconium oxide with a particle size of nanometer scale.

[0140] For example, as shown in Figure 14, the material of the first structure layer 101 is not affected by photolithography and cannot be patterned by photolithography. For example, the material of the first structure layer 101 does not include a photosensitizer.

[0141] For example, as shown in Figures 13 to 15 , the display panel further includes a lens layer 103. As shown in Figures 13 and 14 , the lens layer 103 is located between the first structure layer 101 and the second structure layer 102.

[0142] For example, as shown in FIG. 13 to FIG. 15 , the lens layer 103 includes a plurality of lens groups 1031 , each lens group 1031 includes a plurality of lens units 1032 , and the orthographic projections of the plurality of lens units 1032 on the base substrate BS overlap with the orthographic projections of the openings OPN on the base substrate BS.

[0143] 13 to 15 , the lens layer 103 is located in the light emitting region R1, and each sub-pixel 100 includes a plurality of lens units 1032. For example, the lens layer 103 may be manufactured using a photolithography process.

[0144] 13 to 15 , the lens unit 1032 may have a hemispherical shape. For example, the diameter of the lens unit 1032 is twice the height of the lens unit 1032 .

[0145] For example, as shown in FIG. 13 to FIG. 15 , the refractive index of the lens layer 103 is smaller than the refractive index (first refractive index n1 ) of the first structure layer 101 .

[0146] For example, as shown in Figures 13 to 15 , the refractive index (first refractive index n1) of the first structural layer 101 is approximately 1.8. As shown in Figures 13 to 15 , the material of the first structural layer 101 includes a matrix material and filler particles doped therein. The matrix material includes an acrylic material or an epoxy resin. For example, the filler particles are particles with a high refractive index, such as, but not limited to, zirconium oxide particles. For details about the filler particles, please refer to the previous description and will not be repeated here.

[0147] 13 to 15 , the refractive index of the lens layer 103 is about 1.5-1.6. For example, the refractive index of the lens layer 103 is about 1.5, and the lens layer 103 includes an acrylic material.

[0148] For example, the refractive index of lens layer 103 is greater than 1.5 and less than or equal to 1.6. The material of lens layer 103 includes an acrylic matrix material and filler particles doped therein, i.e., an acrylic material doped with filler particles. For example, the filler particles are particles with a high refractive index, such as zirconium oxide particles. For example, in addition to the matrix material, such as acrylic, the material of lens layer 103 may also include a doped material such as a photosensitizer. It should be noted that other suitable materials may also be used for lens layer 103.

[0149] For example, the diameter of the lens unit 1032 is greater than or equal to the height of the lens unit 1032 , but is not limited thereto.

[0150] In the embodiments of the present disclosure, the height of a component refers to the dimension of the component in a direction perpendicular to the substrate.

[0151] For example, as shown in FIG. 13 and FIG. 14 , the diameter of the lens unit 1032 in the lens layer 103 is on the order of micrometers.

[0152] For example, as shown in FIG. 13 and FIG. 14 , the height of the lens units 1032 in the lens layer 103 is on the order of micrometers.

[0153] For example, as shown in FIG. 13 and FIG. 14 , the diameter of the lens unit 1032 in the lens layer 103 is approximately 9 μm, and the height of the lens unit 1032 in the lens layer 103 is approximately 4.5 μm.

[0154] For example, as shown in FIG. 15 , the length of the sub-pixel 101 is approximately 106 μm, and the width of the sub-pixel 101 is approximately 30 μm, but the present invention is not limited thereto.

[0155] For example, as shown in FIG15 , the fill rate of lens units 1032 is greater than 50%. That is, in a sub-pixel 100, the ratio of the sum of the areas of lens units 1032 to the area of ​​the light-emitting region of that sub-pixel 100 is greater than 50%. The number of lens units 1032 is not limited to that shown in the figure. The fill rate refers to the ratio of the sum of the areas of lens units 1032 to the area of ​​the light-emitting region of that sub-pixel 100.

[0156] The thickness of the first structure layer 101 can be adjusted (>5 μm) to enable the lens layer 103 to produce a light-collecting effect, thereby reducing lateral light and increasing forward light.

[0157] 15 illustrates the case where the lens unit 1032 is disposed in the light emitting region R1. The lens unit 1032 is disposed in the light emitting region R1 instead of in the non-light emitting region R2, which helps to avoid color mixing.

[0158] In other embodiments, the lens unit 1032 may be disposed in the light-emitting region R1 and the non-light-emitting region R2. In this case, it is beneficial to further reduce side light and increase forward light.

[0159] For example, as shown in FIG. 13 and FIG. 14 , the thickness of the first structure layer 101 is greater than the thickness of the lens layer 103 .

[0160] For example, as shown in FIG. 13 and FIG. 14 , the thickness of the first structure layer 101 is greater than 1 μm.

[0161] For example, as shown in FIG. 13 and FIG. 14 , in order to improve light extraction efficiency, the thickness of the first structure layer 101 is greater than 5 μm.

[0162] For example, as shown in Figures 13 and 14 , the thickness of the first structure layer 101 is less than or equal to 20 μm. For example, the thickness of the first structure layer 101 ranges from 5 to 20 μm.

[0163] For example, as shown in FIG. 13 and FIG. 14 , the thickness of the first structure layer 101 is in the range of 5-10 μm. For example, the thickness of the first structure layer 101 is about 10 μm.

[0164] For example, as shown in FIG. 13 and FIG. 14 , the thickness of the main portion MP of the pixel defining layer PDL is in the range of 1-2 μm.

[0165] For example, as shown in FIG. 13 and FIG. 14 , the thickness of the second structure layer 102 is greater than the thickness of the first structure layer 101 .

[0166] For example, as shown in FIG. 13 and FIG. 14 , the thickness of the second structure layer 102 is in the range of 5-25 μm, but is not limited thereto.

[0167] 13 and 14 , the refractive index (second refractive index n2) of the second structure layer 102 is approximately 1.4. For example, the material of the second structure layer 102 includes a silicon-based material. For example, the material of the second structure layer 102 includes a silicon-based resin.

[0168] For example, as shown in Figures 13 and 14, the second structural layer 102 also serves as the bonding layer FL. For example, the material of the second structural layer 102 is a silicone adhesive. For example, as shown in Figures 13 and 14, the material of the second structural layer 102 (bonding layer FL) includes an organic silicone adhesive.

[0169] For example, as shown in Figures 13 and 14, the material of the first structural layer 101 includes an acrylic material doped with filler particles (refractive index greater than 1.6) or an epoxy resin doped with filler particles (refractive index greater than 1.6, for example, a refractive index of approximately 1.8). The second structural layer 102 also serves as the bonding layer FL, and the material of the second structural layer 102 includes a silicone-based resin (refractive index of approximately 1.4). For details about the filler particles, please refer to the previous description and will not be repeated here.

[0170] For example, as shown in FIG. 13 and FIG. 14 , the display panel further includes a cover plate CV, and the cover plate CV is bonded to the array substrate AS via a bonding layer FL (second structural layer 102 ).

[0171] The display panel provided in Figures 13 to 15 of the embodiments of the present disclosure adjusts the structure of the lens layer 103 and at least one of the thickness of the first structural layer 101 to enable the lens layer 103 to produce a focusing effect, change the direction of lateral light, enhance forward light, and also reduce the problem of lateral light crosstalk.

[0172] Figure 16 is a cross-sectional view of a display panel provided by another embodiment of the present disclosure. Figure 17 is a cross-sectional view of another display panel provided by an embodiment of the present disclosure.

[0173] For example, as shown in Figures 16 and 17, a display panel includes a base substrate BS and a pixel-defining layer PDL located on the base substrate BS. The display panel has a non-emission region R2 and an emission region R1, wherein the non-emission region R2 is located between adjacent emission regions R1. The emission region R1 is defined by the pixel-defining layer PDL.

[0174] As shown in Figures 16 and 17, the display panel further includes a first structural layer 101, which is located at least in the plurality of light-emitting regions R1. The display panel further includes a second structural layer 102, which is located in the non-light-emitting regions R2. The first structural layer 101 has a first refractive index n1, and the second structural layer 102 has a second refractive index n2, where the first refractive index n1 is greater than the second refractive index n2.

[0175] For example, as shown in Figures 16 and 17, the area of ​​the first structure layer 101 is not less than the area of ​​the light-emitting region R1, and the side surface of the first structure layer 101 contacts the side surface of the second structure layer 102. Therefore, when light emitted by the light-emitting element passes through the first structure layer 101 and is irradiated at the interface between the first structure layer 101 and the second structure layer 102, total internal reflection occurs because the first refractive index n1 is greater than the second refractive index n2. As a result, the light reflected by the second structure layer 102 travels toward the center line of the light-emitting element, effectively improving light extraction efficiency and alleviating pixel crosstalk.

[0176] For example, as shown in FIG. 16 and FIG. 17 , the side surface of the main body portion MP has a stepped shape, and the second structure layer 102 covers the side surface and the top surface of the main body portion MP.

[0177] For example, as shown in Figures 16 and 17, the main body MP has a first body P1 and a second body P2, there is a step between the first body P1 and the second body P2, the first body P1 is closer to the base substrate BS than the second body P2, and the first structure layer 101 at least fills the space defined by the second body P2.

[0178] For example, as shown in FIG. 16 and FIG. 17 , the second structure layer 102 does not overlap with the bottom surface of the opening OPN. For example, the material of the second structure layer 102 at the bottom surface of the opening OPN can be removed by an etching process.

[0179] For example, as shown in FIG. 16 and FIG. 17 , the material of the second structure layer 102 includes silicon oxide (SiOx), and the refractive index of the second structure layer 102 (the second refractive index n2) is approximately 1.5.

[0180] 16 and 17 , the first structure layer 101 also serves as the adhesive layer FL. The refractive index of the first structure layer 101 (first refractive index n1) is greater than 1.6, and the first refractive index n1 is greater than the second refractive index n2.

[0181] For example, as shown in Figures 16 and 17, the material of the first structural layer 101 includes a matrix material and filler particles doped therein, wherein the matrix material includes an acrylic material or an epoxy resin. For example, the filler particles are particles with a high refractive index, such as, but not limited to, zirconium oxide particles.

[0182] For example, as shown in Figures 16 and 17, the material of the first structural layer 101 includes an acrylic material doped with filling particles (refractive index greater than 1.6) or an epoxy resin doped with filling particles (refractive index greater than 1.6), and the material of the second structural layer 102 includes silicon oxide (refractive index of approximately 1.5).

[0183] As shown in FIG16 and FIG17 , the light emitted by the light emitting element EMC passes through the first structural layer 101 and reaches the second structural layer 102 , where it is totally reflected at the interface, thereby focusing the lateral light, increasing the amount of forward light output, and reducing the crosstalk problem.

[0184] For example, in an embodiment of the present disclosure, the material of the encapsulation layer ECS includes an inorganic encapsulation layer, for example, the inorganic encapsulation layer includes at least one of silicon oxide (SiOx), silicon nitride (SiNx), and silicon oxynitride (SiNxOy).

[0185] For example, in an embodiment of the present disclosure, the material of the encapsulation layer ECS may also include an inorganic encapsulation layer, an organic encapsulation layer, and a stack of inorganic encapsulation layers. For example, the material of the inorganic encapsulation layer includes at least one of silicon oxide (SiOx), silicon nitride (SiNx), and silicon oxynitride (SiNxOy), and the material of the organic encapsulation layer includes an organic resin.

[0186] For example, in an embodiment of the present disclosure, the insulating layer ISL includes at least one of an inorganic insulating layer and an organic insulating layer. For example, the inorganic insulating material includes silicon oxide, silicon nitride, silicon oxynitride, etc., and the organic insulating material includes resin, but is not limited thereto.

[0187] For example, the base substrate BS includes a flexible material such as polyimide or a rigid material such as glass, but is not limited thereto.

[0188] For example, one of the first electrode E1 and the second electrode E2 is an anode, and the other of the first electrode E1 and the second electrode E2 is a cathode.

[0189] For example, the material of the first electrode E1 of the light-emitting element includes a conductive material, such as, but not limited to, at least one of silver (Ag) or indium tin oxide (ITO). For example, the first electrode E1 of the light-emitting element has a three-layer stacked structure of ITO / Ag / ITO, but not limited to this. In other embodiments, the material of the first electrode E1 of the light-emitting element includes aluminum (Al) and tungsten oxide (WOx). For example, the first electrode E1 includes a stacked layer of aluminum and tungsten oxide, and the aluminum layer is closer to the substrate than the tungsten oxide layer.

[0190] For example, the material of the second electrode E2 of the light-emitting element includes a conductive material, such as at least one of magnesium (Mg), silver (Ag), or indium zinc oxide (IZO), but is not limited thereto. For example, in some embodiments, the material of the second electrode E2 of the light-emitting element includes a Mg / Ag alloy.

[0191] As shown in Figures 3A to 3D, 5, 8A, 8B, 14, and 17, the first electrode E1 is connected to the pixel circuit PXC. The pixel circuit PXC may include a transistor (T) and a storage capacitor (C), but is not limited thereto. For example, the pixel circuit PXC includes a 3T1C, 5T1C, 5T2C, 7T1C, or 7T2C pixel circuit, but is not limited thereto. The number of transistors and storage capacitors included in the pixel circuit PXC can be determined as needed.

[0192] 3C , 5 , 8A , 8B , 14 and 17 also show an insulating layer ISL. The first electrode E1 is located on the insulating layer ISL and is connected to the pixel circuit PXC through a via hole penetrating the insulating layer ISL.

[0193] As shown in FIG3C , the pixel circuit PXC is schematically shown in the figure, and the specific structure of the pixel circuit PXC can be determined according to needs.

[0194] For the sake of clarity, some drawings provided in the embodiments of the present disclosure do not show structures such as the first electrode E1 and the pixel circuit PXC.

[0195] As shown in Figures 3B, 8A, 8B, and 17, an intermediate film layer L0 is provided between the first structural layer 101 and the second structural layer 102. For example, the refractive index of the intermediate film layer L0 is greater than the refractive index of the second structural layer 102 (the second refractive index n2). The intermediate film layer L0 may absorb some light. When the intermediate film layer L0 is provided between the first structural layer 101 and the second structural layer 102, the interface for total internal reflection is still the surface of the second structural layer 102. That is, light travels from the first structural layer 101 through the intermediate film layer L0 to the surface of the second structural layer 102 (the interface between the second structural layer 102 and the intermediate film layer L0), where it undergoes total internal reflection.

[0196] For example, as shown in FIG. 3B , FIG. 8B , and FIG. 17 , the intermediate film layer L0 includes a second electrode E2 and an encapsulation layer ECS.

[0197] For example, as shown in FIG8A , the intermediate film layer L0 includes an encapsulation layer ECS.

[0198] For example, the refractive index of the intermediate film layer L0 is greater than or equal to the refractive index (first refractive index n1 ) of the first structure layer 101 , but is not limited thereto.

[0199] In some embodiments, the refractive index of the intermediate film layer L0 is greater than the refractive index of the second structure layer 102 (second refractive index n2), and the refractive index of the intermediate film layer L0 is greater than or equal to the refractive index of the first structure layer 101 (first refractive index n1).

[0200] In the embodiment of the present disclosure, the acrylic material includes acrylic resin, but is not limited thereto.

[0201] At least one embodiment of the present disclosure provides a display device including any of the above-mentioned display panels. For example, the display device can be any product or component with a display function, such as a television, digital camera, mobile phone, watch, tablet computer, laptop computer, or navigation system, that includes an organic light-emitting diode display device.

[0202] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A display panel, comprising: A base substrate, comprising a plurality of light-emitting regions and a non-light-emitting region between adjacent light-emitting regions; a pixel defining layer, located on the base substrate, having a main body and a plurality of openings defined by the main body, wherein the opening is configured to define at least one of the plurality of light-emitting areas; A first structural layer, located at least in one of the light-emitting areas; The second structural layer is at least located in the non-luminescent area, The first structure layer has a first refractive index, the second structure layer has a second refractive index, and the first refractive index is greater than the second refractive index.

2. The display panel according to claim 1, wherein: The second structural layer is located on the main body, and the first structural layer fills a space defined by the second structural layer.

3. The display panel according to claim 2, wherein: The orthographic projection of the second structure layer on the base substrate falls within the orthographic projection of the main body on the base substrate.

4. The display panel according to claim 2 or 3, wherein: The first structural layer includes a base layer and filling particles located in the base layer, and the refractive index of the filling particles is greater than the refractive index of the base layer.

5. The display panel according to claim 4, wherein: The material of the base layer includes acrylic material, and the material of the second structure layer includes acrylic material.

6. The display panel according to claim 4 or 5, wherein: The particle size of the filling particles is at nanometer level.

7. The display panel according to any one of claims 4 to 6, wherein: A surface of the first structure layer facing away from the base substrate has a concavo-convex structure.

8. The display panel according to any one of claims 1 to 7, further comprising a bonding layer, wherein: The adhesive layer covers the first structural layer and covers the second structural layer.

9. The display panel according to claim 8, wherein: The bonding layer is in contact with the first structural layer.

10. The display panel according to claim 1, wherein: The area of ​​the first structure layer is not less than the area of ​​the light emitting region, and the side surface of the first structure layer contacts the side surface of the second structure layer.

11. The display panel according to claim 10, further comprising a cover plate, wherein: The cover plate contacts the first structural layer and contacts the second structural layer.

12. The display panel according to claim 1, wherein: The main body has a groove, and the second structure layer is filled in the groove and protrudes from the main body.

13. The display panel according to claim 12, further comprising an adhesive layer and a cover plate, wherein: The cover plate is bonded to the base substrate via the bonding layer, and the refractive index of the bonding layer is greater than the second refractive index.

14. The display panel according to claim 12 or 13, wherein: A ratio of a maximum dimension of a portion of the second structural layer protruding from the main body portion to a maximum thickness of the main body portion is greater than or equal to 1:2 and less than or equal to 3:

2.

15. The display panel according to claim 1, wherein: The first structure layer is located in the light emitting area and in the non-light emitting area, the second structure layer is located in the light emitting area and in the non-light emitting area, and the first structure layer is closer to the base substrate than the second structure layer.

16. The display panel according to claim 15, further comprising a lens layer, wherein: The lens layer is located between the first structure layer and the second structure layer.

17. The display panel according to claim 16, wherein: The lens layer includes a plurality of lens groups, each lens group includes a plurality of lens units, and the orthographic projections of the plurality of lens units on the base substrate overlap with the orthographic projections of the opening on the base substrate.

18. The display panel according to claim 1, wherein: The side surface of the main body has a step shape, and the second structure layer covers the side surface and the top surface of the main body.

19. The display panel according to claim 18, wherein: The main body portion comprises a first main body and a second main body, a step is provided between the first main body and the second main body, the first main body is closer to the base substrate than the second main body, and the first structural layer at least fills a space defined by the second main body.

20. The display panel according to any one of claims 1 to 19, further comprising an intermediate film layer located between the first structural layer and the second structural layer, wherein: The refractive index of the intermediate film layer is greater than the second refractive index, and greater than or equal to the first refractive index.

21. A display device comprising the display panel according to any one of claims 1-20.

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