Display panel and display device

Abstract

The application provides a display panel and a display device. The display panel comprises an array substrate, a light-emitting device layer, a light-emitting structure layer and a polarizing layer. The light-emitting structure layer comprises a first sub-light-emitting layer, a second sub-light-emitting layer and a third sub-light-emitting layer. The first sub-light-emitting layer has a light-emitting opening. The second sub-light-emitting layer covers at least the sidewall of the light-emitting opening. The third sub-light-emitting layer comprises a first sub-part and a second sub-part. The first sub-part fills the light-emitting opening. The second sub-part is arranged on the first sub-part. The refractive index of the first sub-light-emitting layer is less than that of the third sub-light-emitting layer. The refractive index of the second sub-light-emitting layer is less than that of the first sub-light-emitting layer. In this way, light originally diverging at a large viewing angle is converged at a normal viewing angle. The material of the third sub-light-emitting layer has good leveling and viscosity. The polarizing layer can be directly pasted on the surface of the second sub-part away from the first sub-part. Therefore, the normal viewing angle brightness of the display panel can be improved, and the power consumption of the display panel can be reduced.

Description

Technical Field

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

[0002] With the development of flat panel display technology, the requirements for the stability of display panels are gradually increasing. In recent years, organic light-emitting diode (OLED) display panels have developed rapidly worldwide, and OLED display technology has also become increasingly sophisticated.

[0003] Organic light-emitting diode (OLED) display panels typically include light-emitting devices. Due to the large light emission angle of these devices, the light emission efficiency of OLEDs is relatively low, resulting in low brightness at the forward viewing angle of OLED display panels.

[0004] Therefore, it is necessary to provide a display panel and display device to improve this deficiency. Summary of the Invention

[0005] Embodiments of this application provide a display panel that can improve the brightness of the display panel at the normal viewing angle.

[0006] To achieve the above objectives, according to a first aspect of this application, a display panel is provided, comprising:

[0007] Array substrate;

[0008] A light-emitting device layer is disposed on the array substrate, and the light-emitting device layer includes a plurality of light-emitting devices;

[0009] A light-emitting structure layer is disposed on the light-emitting device layer, the light-emitting structure layer comprising:

[0010] The first sub-light-emitting layer has multiple light-emitting openings, which are aligned with the light-emitting device.

[0011] The second light-emitting layer at least covers the sidewall of the light-emitting opening; and

[0012] A third sub-light-emitting layer is disposed on the second sub-light-emitting layer. The second sub-light-emitting layer includes a first sub-part and a second sub-part. The first sub-part fills the light-emitting opening, and the second sub-part is disposed on the side of the first sub-part away from the light-emitting device layer, and the second sub-part is located outside the light-emitting opening.

[0013] The display panel further includes a polarizing layer disposed on the surface of the second sub-part away from the first sub-part. The thickness ratio of the first sub-part to the second sub-part is greater than or equal to 1:3 and less than or equal to 1:10. The refractive index of the first sub-light-emitting layer is less than that of the third sub-light-emitting layer, and the refractive index of the second sub-light-emitting layer is less than that of the first sub-light-emitting layer. Optionally, the light-emitting opening gradually increases in size from one end near the light-emitting device layer to one end away from the light-emitting device layer, and the size of the first sub-part is adapted to the size of the light-emitting opening.

[0014] Optionally, the cross-sectional shape of the light-emitting opening is an inverted trapezoid, and the cross-sectional shape of the first sub-part is the same as the cross-sectional shape of the light-emitting opening.

[0015] Optionally, the angle between the sidewall of the light-emitting opening and the surface of the first sub-light-emitting layer near the light-emitting device layer is greater than or equal to 60 degrees and less than 90 degrees, and the angle between the sidewall of the light-emitting opening and the surface of the first sub-light-emitting layer near the light-emitting device layer is complementary to the bottom angle of the first sub-part.

[0016] Optionally, the light-emitting device layer includes a pixel definition layer, the pixel definition layer having a plurality of pixel openings, and the light-emitting device being disposed in the corresponding pixel opening;

[0017] Wherein, the bottom edge of the light-emitting opening is extended outward relative to the bottom edge of the pixel opening, and the outward extension width is greater than or equal to 0 and less than or equal to 2 micrometers; or, the bottom edge of the light-emitting opening is recessed inward relative to the bottom edge of the pixel opening, and the recessed width is greater than or equal to 0 and less than or equal to 1 micrometer.

[0018] Optionally, the refractive index of the first sub-light-emitting layer is greater than or equal to 1.5 and less than or equal to 1.55, the refractive index of the second sub-light-emitting layer is greater than or equal to 1.45 and less than or equal to 1.5, and the refractive index of the third sub-light-emitting layer is greater than or equal to 1.55 and less than or equal to 1.65.

[0019] Optionally, the thickness of the second sub-light-emitting layer is less than the thickness of the first sub-light-emitting layer, and the thickness of the third sub-light-emitting layer is greater than the thickness of the first sub-light-emitting layer.

[0020] Optionally, the thickness of the first sub-emitting layer is greater than or equal to 2 micrometers and less than or equal to 4 micrometers, the thickness of the second sub-emitting layer is greater than or equal to 50 nanometers and less than or equal to 10% of the thickness of the first sub-emitting layer, and the thickness of the third sub-emitting layer is greater than or equal to 10 micrometers and less than or equal to 30 micrometers.

[0021] Optionally, the material of the third sub-light-emitting layer has an initial tack greater than 2N at room temperature.

[0022] Optionally, the material of the third sub-light-emitting layer has an elastic modulus greater than 1 N / 25 mm at 80°C.

[0023] Optionally, the material of the third sub-light-emitting layer has a loss angle tangent greater than or equal to 0.05 and less than or equal to 0.5 at temperatures between 25°C and 85°C.

[0024] Optionally, the material of the third sub-light-emitting layer has an elastic modulus at room temperature greater than or equal to 30 kPa and less than or equal to 200 kPa.

[0025] Optionally, the material of the third sub-light-emitting layer has an elastic modulus greater than or equal to 10 kPa at 85°C.

[0026] Optionally, the material of the first sub-light-emitting layer includes epoxy resin, the material of the second sub-light-emitting layer includes any one of polyurethane without active groups, acrylic without active groups, and silicone without active groups, and the material of the third sub-light-emitting layer includes any one of polyurethane with active groups, acrylic with active groups, and silicone with active groups.

[0027] Optionally, the second sub-light-emitting layer is continuously disposed on the surface of the first sub-light-emitting layer away from the light-emitting device layer, the sidewall of the light-emitting opening, and the bottom, and the third sub-light-emitting layer is disposed entirely on the surface of the second sub-light-emitting layer away from the light-emitting device layer.

[0028] Optionally, the display panel further includes a color filter layer disposed between the light-emitting device layer and the light-emitting structure layer.

[0029] According to a second aspect of this application, a display device is provided, including a display panel as described above.

[0030] In the display panel of this application embodiment, a light-emitting structure layer is added on the light-emitting device layer. Multiple light-emitting openings aligned with the light-emitting device are formed on the first sub-light-emitting layer of the light-emitting structure layer. At least the sidewalls of the light-emitting openings are covered by a second sub-light-emitting layer. A third sub-light-emitting layer is disposed on the second sub-light-emitting layer. The third sub-light-emitting layer includes a first sub-part and a second sub-part. The first sub-part fills the light-emitting openings, and the second sub-part is disposed on the side of the first sub-part away from the light-emitting device layer and outside the light-emitting openings. A polarizing layer is disposed on the surface of the second sub-part away from the first sub-part. By making the refractive index of the first sub-light-emitting layer smaller than that of the third sub-light-emitting layer, and the refractive index of the second sub-light-emitting layer smaller than that of the first sub-light-emitting layer, a large refractive index difference is achieved between the third and second sub-light-emitting layers. This reduces the critical angle for total internal reflection at the interface between the third and second sub-light-emitting layers, allowing the light emitted by the light-emitting device to be more easily reflected. Total internal reflection occurs at the interface between the third sub-light-emitting layer and the second sub-light-emitting layer on the sidewall of the light-emitting opening. This alters the light path of the light-emitting device, converging the light that was originally dispersed to a wide viewing angle to a positive viewing angle, thus improving the brightness of the display panel at the positive viewing angle. The material of the third sub-light-emitting layer has good leveling and adhesion. As long as the ratio of the thickness of the first sub-part to the second sub-part is greater than or equal to 1:3 and less than or equal to 1:10, it can ensure that the first sub-part completely fills the light-emitting opening, avoiding the decrease in light-emitting efficiency of the display panel due to insufficient filling in the light-emitting opening. It can also make the surface of the second sub-part away from the first sub-part a flat surface, so that the polarizing layer can be directly pasted onto the surface of the second sub-part away from the first sub-part. This can improve the bonding effect between the light-emitting structure layer and the polarizing layer, thereby increasing the light-emitting efficiency of the display panel while improving the process yield and reducing the power consumption of the display panel.

[0031] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0034] Figure 1 A schematic diagram of the structure of a first type of display panel provided for an embodiment of this application;

[0035] Figure 2A schematic diagram of the optical path in a display panel provided for an embodiment of this application;

[0036] Figure 3 A schematic diagram of the structure of a second display panel provided for an embodiment of this application;

[0037] Figure 4 A schematic diagram of the structure of a third type of display panel provided for an embodiment of this application;

[0038] Figure 5 A graph showing the change in light emission efficiency of the display panel as a function of the size of the light emission aperture, provided for embodiments of this application;

[0039] Figure 6 A schematic diagram of the structure of a fourth display panel provided for an embodiment of this application;

[0040] Figure 7 This is a schematic diagram of the structure of a display device provided in an embodiment of this application.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Array substrate;

[0043] 2. Light-emitting device layer; 21. Light-emitting device; 22. Pixel definition layer; 221. Pixel aperture;

[0044] 3. Light-emitting structure layer; 31. First sub-light-emitting layer; 311. Light-emitting opening; 32. Second sub-light-emitting layer; 33. Third sub-light-emitting layer; 331. First sub-section; 332. Second sub-section;

[0045] 4. Polarizing layer;

[0046] 5. Color filter layer; 51. Light-blocking layer; 52. Color resist layer;

[0047] 6. Encapsulation layer;

[0048] 7. Touch layer;

[0049] 8. Protective layer;

[0050] 9. Adhesive layer;

[0051] 10. Covering layer;

[0052] 100, Display panel; 200, Housing; 1000, Display device. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0054] This application provides a display panel comprising an array substrate, a light-emitting device layer, and a light-emitting structure layer. The light-emitting device layer is disposed on the array substrate and includes a plurality of light-emitting devices. The light-emitting structure layer is disposed on the light-emitting device layer and includes a first sub-light-emitting layer, a second sub-light-emitting layer, and a third sub-light-emitting layer. The first sub-light-emitting layer has a plurality of light-emitting openings aligned with the light-emitting devices. The second sub-light-emitting layer at least covers the sidewalls of the light-emitting openings. The third sub-light-emitting layer is disposed on the second sub-light-emitting layer. The dual-sub-emitting layer includes a first sub-part and a second sub-part. The first sub-part fills the light-emitting opening, and the second sub-part is disposed on the side of the first sub-part away from the light-emitting device layer and is located outside the light-emitting opening. The display panel also includes a polarizing layer disposed on the surface of the second sub-part away from the first sub-part. The ratio of the thickness of the first sub-part to the thickness of the second sub-part is greater than or equal to 1:3 and less than or equal to 1:10. The refractive index of the first sub-emitting layer is less than the refractive index of the third sub-emitting layer, and the refractive index of the second sub-emitting layer is less than the refractive index of the first sub-emitting layer.

[0055] In the embodiments of this application, a light-emitting structure layer is added to the light-emitting device layer. Multiple light-emitting openings aligned with the light-emitting device are formed on the first sub-light-emitting layer of the light-emitting structure layer. At least the sidewalls of the light-emitting openings are covered by a second sub-light-emitting layer. A third sub-light-emitting layer is disposed on the second sub-light-emitting layer. The third sub-light-emitting layer includes a first sub-part and a second sub-part. The first sub-part fills the light-emitting openings, and the second sub-part is disposed on the side of the first sub-part away from the light-emitting device layer and outside the light-emitting openings. A polarizing layer is disposed on the surface of the second sub-part away from the first sub-part. By making the refractive index of the first sub-light-emitting layer smaller than that of the third sub-light-emitting layer, and the refractive index of the second sub-light-emitting layer smaller than that of the first sub-light-emitting layer, a large refractive index difference is achieved between the third and second sub-light-emitting layers. This reduces the small critical angle at the interface between the third and second sub-light-emitting layers, making it easier for light to be emitted. Total internal reflection occurs at the interface between the third sub-light-emitting layer and the second sub-light-emitting layer on the sidewall of the opening. This changes the light path of the light-emitting device, converging the light that was originally dispersed to a wide viewing angle to a positive viewing angle, thereby improving the brightness of the display panel at the positive viewing angle. The material of the third sub-light-emitting layer has good leveling and adhesion. As long as the ratio of the thickness of the first sub-part to the second sub-part is greater than or equal to 1:3 and less than or equal to 1:10, it can be ensured that the first sub-part completely fills the light-emitting opening, avoiding the decrease in light-emitting efficiency of the display panel due to insufficient filling in the light-emitting opening. It can also make the surface of the second sub-part away from the first sub-part a flat surface, so that the polarizing layer can be directly pasted on the surface of the second sub-part away from the first sub-part. This can improve the bonding effect between the light-emitting structure layer and the polarizing layer, thereby increasing the light-emitting efficiency of the display panel while improving the process yield and reducing the power consumption of the display panel.

[0056] Please see Figure 1 , Figure 1 The first type of display panel provided in the embodiments of this application is a schematic diagram of the structure. The display panel 100 includes an array substrate 1, a light-emitting device layer 2 and a light-emitting structure layer 3. The light-emitting device layer 2 is disposed on the array substrate 1 and the light-emitting structure layer 3 is disposed on the light-emitting device layer 2.

[0057] In some embodiments, the array substrate 1 includes a substrate and a driving circuit layer (not shown in the figure), wherein the driving circuit layer is disposed on the substrate.

[0058] In some embodiments, the substrate may be a single-layer structure formed of organic or inorganic materials, or it may be a multilayer structure formed by stacking organic and inorganic materials. The organic material may be polyimide, and the inorganic material may be selected from at least one of glass, silicon nitride, silicon oxide, and silicon oxynitride.

[0059] In some embodiments, the driving circuit layer can be a multilayer structure composed of a semiconductor layer, a conductive layer, an inorganic insulating layer, and an organic insulating layer. The driving circuit layer can be replaced with the film layer structure of the driving circuit layer in an existing display panel, which will not be elaborated here.

[0060] Please see Figure 1 The light-emitting device layer 2 includes multiple light-emitting devices 21. The light-emitting devices 21 are electrically connected to the corresponding pixel driving circuits in the array substrate. The light-emitting devices 21 can emit light under the drive of the pixel driving circuits.

[0061] In some embodiments, the light-emitting device 21 is an organic light-emitting diode. The light-emitting device 21 may include an anode, a light-emitting layer and a cathode stacked together. The light-emitting layer may include, but is not limited to, a hole injection layer, a hole transport layer, an organic light-emitting material layer, an electron transport layer and an electron injection layer stacked together.

[0062] Please see Figure 1 The light-emitting structure layer 3 includes a first sub-light-emitting layer 31, a second sub-light-emitting layer 32, and a third sub-light-emitting layer 33. The first sub-light-emitting layer 31 is disposed on the light-emitting device layer 2 and has multiple light-emitting openings 311. The light-emitting openings 311 penetrate the first sub-light-emitting layer 31 in the thickness direction. Each light-emitting opening 311 is aligned with a light-emitting device 21, that is, the orthographic projection of the light-emitting opening 311 on the array substrate 1 overlaps with the orthographic projection of the light-emitting device 21 on the array substrate 1. The light emitted by the light-emitting device 21 can be emitted from the display panel through the corresponding light-emitting opening 311.

[0063] Please see Figure 1 The second sub-light-emitting layer 32 at least covers the sidewall of the light-emitting opening 311. A third sub-light-emitting layer 33 is disposed on the second sub-light-emitting layer 32. The third sub-light-emitting layer 33 includes a first sub-part 331 and a second sub-part 332. The first sub-part 331 fills the light-emitting opening 311. The second sub-part 332 is disposed on the side of the first sub-part 331 away from the light-emitting device layer 21 and is located outside the light-emitting opening 311. The refractive index of the first sub-light-emitting layer 31 is less than the refractive index of the third sub-light-emitting layer 33, and the refractive index of the second sub-light-emitting layer 32 is less than the refractive index of the first sub-light-emitting layer 31. The display panel also includes a polarizing layer disposed on the surface of the second sub-part 332 away from the first sub-part 331. The ratio of the thickness of the first sub-part 331 to the thickness of the second sub-part 332 is greater than or equal to 1:3 and less than or equal to 1:10.

[0064] Please see Figure 1 and Figure 2 , Figure 2The diagram shows the optical path in the display panel provided in the embodiment of this application. Since the refractive index of the first sub-light-emitting layer 31 is less than that of the third sub-light-emitting layer 33, and the refractive index of the second sub-light-emitting layer 32 is less than that of the first sub-light-emitting layer 31, when part of the light emitted by the light-emitting device 21 shines on the interface between the third sub-light-emitting layer 33 and the second sub-light-emitting layer 32, total internal reflection can occur. The emission angle of this part of the light decreases and converges to the positive viewing angle, thereby improving the brightness of the display panel at the positive viewing angle.

[0065] In some embodiments, please refer to Figure 1 The ratio of the thickness of the first sub-part 331 to the thickness of the second sub-part 332 is greater than or equal to 1:3 and less than or equal to 1:10. The display panel 100 also includes a polarizing layer 4, which is disposed on the surface of the second sub-part 332 away from the first sub-part 331. That is, the light-emitting structure layer 3 is disposed between the light-emitting device layer 2 and the polarizing layer 4. This can improve the light-emitting efficiency and the contrast of the display panel.

[0066] It should be noted that the polarizing layer 4 uses a specific molecular arrangement to ensure that light propagates in only one specific direction, thus achieving light polarization. In other words, the polarizing layer 4 only allows light from a specific direction to pass through. If the polarizing layer 4 is placed between the light-emitting device layer 2 and the light-emitting structure layer 3, the polarization direction of the light filtered by the polarizing layer 4 will change after passing through the light-emitting structure layer 3, leading to image distortion or discrepancy. Therefore, the polarizing layer 4 can only be placed on the side of the light-emitting structure layer 3 furthest from the light-emitting device layer 2, in order to achieve both improved light extraction efficiency and reduced reflectivity.

[0067] It should also be noted that, since the material of the third sub-light-emitting layer 33 has good leveling and adhesion, as long as the ratio of the thickness of the first sub-part 331 to the second sub-part 332 is greater than or equal to 1:3 and less than or equal to 1:10, it can ensure that the first sub-part 331 completely fills the light-emitting opening 311, avoiding the situation where the light-emitting efficiency of the display panel decreases due to insufficient filling in the light-emitting opening 311. It can also make the surface of the second sub-part 332 away from the first sub-part 331 a flat surface, so that the polarizing layer 4 can be directly pasted onto the surface of the second sub-part 332 away from the first sub-part 331. This can improve the bonding effect of the light-emitting structure layer 3 and the polarizing layer 4, thereby improving the process yield of the display panel. Therefore, the light-emitting structure layer 3 can simultaneously meet the optical and mechanical requirements of the display panel.

[0068] In some embodiments, the initial tack of the material of the third sub-light-emitting layer 33 at room temperature is greater than 2N. The initial tack of the material of the third sub-light-emitting layer 33 is the instantaneous tack. By limiting the initial tack of the material of the third sub-light-emitting layer 33 at room temperature to above 2N, the situation where the bonding effect of the display panel is poor due to the low instantaneous tack of the third sub-light-emitting layer 33 can be avoided.

[0069] In some embodiments, the elastic modulus of the material of the third sub-light-emitting layer 33 at 80°C is greater than 1 N / 25 mm. The elastic modulus of the material of the third sub-light-emitting layer 33 at 80°C can reflect the long-term tackiness of the material of the third sub-light-emitting layer 33. By limiting the elastic modulus of the material of the third sub-light-emitting layer 33 at 80°C to above 1 N / 25 mm, the tackiness of the third sub-light-emitting layer 33 can be prevented from decreasing significantly with time or temperature changes.

[0070] In some embodiments, the loss tangent of the material of the third sub-light-emitting layer 33 at 25°C to 85°C is greater than or equal to 0.05 and less than or equal to 0.5. This allows the third sub-light-emitting layer 33 to have good leveling properties, ensuring that the material of the third sub-light-emitting layer 33 can completely fill the light-emitting opening 311. This avoids the occurrence of gaps in the light-emitting opening 311 due to insufficient fluidity, which would otherwise prevent the opening from being completely filled and cause optical defects.

[0071] In some embodiments, the elastic modulus of the material of the third sub-light-emitting layer 33 at room temperature is greater than or equal to 30 kPa and less than or equal to 200 kPa. For example, the elastic modulus of the material of the third sub-light-emitting layer 33 at room temperature can be 30 kPa, 70 kPa, 100 kPa, 150 kPa, 175 kPa, or 200 kPa, etc. As long as it is between 30 kPa and 200 kPa, it can be ensured that the material of the third sub-light-emitting layer 33 can completely fill the light-emitting opening 311, avoiding the occurrence of gaps in the light-emitting opening 311 due to insufficient leveling and inability to completely fill the opening, which would cause optical defects.

[0072] In some embodiments, the elastic modulus of the material of the third sub-light-emitting layer 33 at 85°C is greater than or equal to 10 kPa. For example, the elastic modulus of the material of the third sub-light-emitting layer 33 at 85°C can be 10 kPa, 13 kPa, 15 kPa, 17 kPa, or 20 kPa, etc. As long as it is greater than or equal to 10 kPa, it can be ensured that the material of the third sub-light-emitting layer 33 can completely fill the light-emitting opening 311, avoiding the occurrence of gaps in the light-emitting opening 311 due to insufficient leveling and inability to completely fill the opening, which would cause optical defects.

[0073] In some embodiments, the second sub-light-emitting layer 32 covers the sidewall of the light-emitting opening 311, and the third sub-light-emitting layer 33 not only fills the light-emitting opening 311, but is also disposed on the surface of the first sub-light-emitting layer 31 away from the light-emitting device layer 2. This not only ensures that the third sub-light-emitting layer 33 can fill the light-emitting opening 311, but also focuses the light emitted by the light-emitting device 21 to the positive viewing angle, thereby improving the brightness of the display panel at the positive viewing angle.

[0074] In some embodiments, the second sub-light-emitting layer 32 is continuously disposed on the sidewall and bottom of the light-emitting opening 311, and the third sub-light-emitting layer 33 only fills the light-emitting opening 311. In this way, the light emitted by the light-emitting device 21 can also be focused to the positive viewing angle, thereby improving the brightness of the display panel at the positive viewing angle.

[0075] In some embodiments, the third sub-light-emitting layer 33 not only fills the light-emitting opening 311, but is also disposed on the surface of the first sub-light-emitting layer 31 away from the light-emitting device layer 2. This ensures that the third sub-light-emitting layer 33 can fill the light-emitting opening 311 and can also focus the light emitted by the light-emitting device 21 to the positive viewing angle, thereby improving the brightness of the display panel at the positive viewing angle.

[0076] In some embodiments, please refer to Figure 1 The second sub-light-emitting layer 32 is continuously disposed on the surface of the first sub-light-emitting layer 31 away from the light-emitting device layer 2, the sidewall of the light-emitting opening 311, and the bottom. It should be noted that during the process of etching the first sub-light-emitting layer 31 to form the light-emitting opening 311, some photoresist and material of the first sub-light-emitting layer 31 may remain on the surface of the first sub-light-emitting layer 31 and inside the light-emitting opening 311. This residual material will not only affect the flatness of the subsequently formed film layer, but will also cause display defects in the display panel. In this embodiment, by continuously disposing the second sub-light-emitting layer 32 on the surface of the first sub-light-emitting layer 31 away from the light-emitting device layer 2, the sidewall of the light-emitting opening 311, and the bottom, it can not only increase the refractive index difference at the sidewall of the light-emitting opening 311, so that more light can undergo total internal reflection at the sidewall of the light-emitting opening 311, thereby improving the brightness of the display panel at the positive viewing angle, but also remove the residue generated by the process of the first sub-light-emitting layer 31 by using the process of the second sub-light-emitting layer 32. This can not only improve the flatness of the subsequently formed film layer, but also avoid display defects in the display panel.

[0077] In some embodiments, the material of the first sub-light-emitting layer 31 includes epoxy resin, and the material of the second sub-light-emitting layer 32 includes any one of polyurethane without active groups, acrylic without active groups, and silicone without active groups. The polyurethane without active groups can be thermoplastic polyurethane, and the acrylic without active groups can be polymethyl methacrylate or polyacrylate copolymer.

[0078] In some embodiments, please refer to Figure 1 The third sub-light-emitting layer 33 is disposed entirely on the surface of the second sub-light-emitting layer 32 away from the light-emitting device layer 2. The second sub-light-emitting layer 32 is continuously disposed on the surface of the first sub-light-emitting layer 31 away from the light-emitting device layer 2, the sidewall and bottom of the light-emitting opening 311. The third sub-light-emitting layer 33 not only fills the light-emitting opening 311, but is also disposed on the surface of the second sub-light-emitting layer 32 above the first sub-light-emitting layer 31, which does not have a light-emitting opening 311. That is, the second sub-light-emitting layer 32 not only covers the first sub-light-emitting layer 31, but also covers the sidewall and bottom of the light-emitting opening 311. The third sub-light-emitting layer 33 covers the second sub-light-emitting layer 32 entirely.

[0079] In some embodiments, the material of the third sub-light-emitting layer 33 includes any one of polyurethane containing active groups, acrylic containing active groups, and silicone containing active groups. The active groups can be hydroxyl, carboxyl, or epoxy groups, etc., and can physically or chemically interact with the surfaces of adjacent film layers, giving the third sub-light-emitting layer 33 good adhesion. This facilitates the direct adhesion of the polarizing layer to the surface of the third sub-light-emitting layer 33, improving the bonding effect between the light-emitting structure layer and the polarizing layer. This, in turn, can increase the light-emitting efficiency of the display panel while improving the manufacturing yield and reducing the power consumption of the display panel.

[0080] In some embodiments, the polyurethane containing active groups can be hydroxyl-terminated polyurethane, isocyanate-terminated polyurethane, amino-terminated polyurethane, and carboxyl-terminated polyurethane, etc.; the acrylic containing active groups can be acrylic adhesive; and the silicone containing active groups can be hydroxyl-terminated silicone, amino-terminated silicone, epoxy-terminated silicone, and carboxyl-terminated silicone, etc.

[0081] In some embodiments, please refer to Figure 1 and Figure 2 The light-emitting opening 311 gradually expands from the end closest to the light-emitting device layer 2 to the end furthest from the light-emitting device layer 2. The size of the first sub-part 331 is adapted to the size of the light-emitting opening 311, that is, the size of the first sub-part 331 gradually increases from the end closest to the light-emitting device layer 2 to the end furthest from the light-emitting device layer 2. By making the light-emitting opening 311 gradually expand from the end closest to the light-emitting device layer 2 to the end furthest from the light-emitting device layer 2, the obstruction of light by the first sub-light-emitting layer 31 can be reduced, and it is convenient for the light to undergo total internal reflection at the interface between the third sub-light-emitting layer 33 and the second sub-light-emitting layer 32 on the sidewall of the light-emitting opening 311. This changes the light-emitting path of the light-emitting device 21, and focuses the light that was originally dispersed to a wide viewing angle to a positive viewing angle, thereby improving the brightness of the display panel at the positive viewing angle and reducing the power consumption of the display panel.

[0082] It should be noted that the size of the light-emitting opening 311 refers to: when the light-emitting opening 311 is a circular hole, the size of the light-emitting opening 311 refers to the diameter of the bottom of the light-emitting opening 311; when the shape of the light-emitting opening 311 is an elliptical hole or a hole of other shapes, the size of the light-emitting opening 311 refers to the diameter of the circumscribed circle of the bottom of the light-emitting opening 311. Similarly, the size of the first sub-part 331 refers to the diameter of the first sub-part 331 or the diameter of the circumscribed circle of the first sub-part 331.

[0083] In some embodiments, please refer to Figure 1 and Figure 2 The cross-sectional shape of the light-emitting opening 311 is an inverted trapezoid, and the cross-sectional shape of the first sub-part 331 is the same as that of the light-emitting opening 311, that is, the cross-sectional shape of the first sub-part 331 is also an inverted trapezoid.

[0084] In some embodiments, please refer to Figure 2 The angle α1 between the sidewall of the light-emitting opening 311 and the surface of the first sub-light-emitting layer 31 near the light-emitting device layer 2 is greater than or equal to 60 degrees and less than 90 degrees. For example, the angle α1 between the sidewall of the light-emitting opening 311 and the surface of the first sub-light-emitting layer 31 near the light-emitting device layer 2 can be 60 degrees, 65 degrees, 70 degrees, 75 degrees, 80 degrees, 85 degrees, 89 degrees, etc. As long as it is between 60 and 90 degrees, it can be ensured that most of the light emitted by the light-emitting device 21 can undergo total internal reflection at the interface between the third sub-light-emitting layer and the second sub-light-emitting layer on the sidewall of the light-emitting opening. This changes the light-emitting path of the light-emitting device, focusing the light that was originally dispersed to a wide viewing angle to a positive viewing angle, thereby improving the brightness of the display panel at the positive viewing angle and reducing the power consumption of the display panel.

[0085] In some embodiments, the angle α1 between the sidewall of the light-emitting opening 311 and the surface of the first sub-light-emitting layer 31 near the light-emitting device layer 2 is greater than or equal to 65 degrees and less than 85 degrees.

[0086] In some embodiments, please refer to Figure 1 and Figure 2 The angle between the sidewall of the light-emitting opening 311 and the surface of the first sub-light-emitting layer 31 near the light-emitting device layer 2 is complementary to the bottom angle of the first sub-section 331, wherein the bottom angle of the first sub-section 331 is greater than 90 degrees and less than or equal to 120 degrees. For example, when the angle α1 between the sidewall of the light-emitting opening 311 and the surface of the first sub-light-emitting layer 31 near the light-emitting device layer 2 is 65 degrees, the bottom angle of the first sub-section 331 is 115 degrees; or, when the angle α1 between the sidewall of the light-emitting opening 311 and the surface of the first sub-light-emitting layer 31 near the light-emitting device layer 2 is 80 degrees, the bottom angle of the first sub-section 331 is 100 degrees.

[0087] In some embodiments, please refer to Figure 2The light-emitting device layer 2 includes a pixel definition layer 22, which has multiple pixel openings 221, and the light-emitting device 21 is disposed in the corresponding pixel opening 221.

[0088] In some embodiments, please refer to Figure 2 The size of pixel aperture 221 is greater than or equal to the size of light-emitting aperture 311. The bottom edge of light-emitting aperture 311 is extended outward relative to the bottom edge of pixel aperture 221, with an extension width d1 greater than or equal to 0 and less than or equal to 2 micrometers. This ensures a significant improvement in light extraction efficiency, meeting optical requirements. It should be noted that the size of pixel aperture 221 refers to: when pixel aperture 221 is a circular hole, the size refers to the diameter of the bottom of pixel aperture 221; when pixel aperture 221 is an elliptical hole or a hole of other shapes, the size refers to the diameter of the outer circle of the bottom of pixel aperture 221.

[0089] In some embodiments, please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of a second type of display panel provided in an embodiment of this application. Figure 1 The display panels shown have roughly the same structure, the difference being that the size of the pixel aperture 221 is greater than or equal to the size of the light-emitting aperture 311, and the bottom edge of the light-emitting aperture 311 is recessed relative to the bottom edge of the pixel aperture 221, with the recessed width d1 being greater than or equal to 0 and less than or equal to 1 micrometer. This also ensures a significant improvement in light emission efficiency, meeting optical requirements.

[0090] In some embodiments, please refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of a third type of display panel provided in an embodiment of this application. Figure 1 The display panels shown have roughly the same structure, the difference being that the size of the pixel opening is the same as the size of the light-emitting opening, and the distance between the edge of the pixel opening 221 and the edge of the light-emitting opening 311 is 0, meaning the edge of the pixel opening 221 is flush with the edge of the light-emitting opening 311. This also ensures a significant improvement in light emission efficiency, meeting optical requirements.

[0091] Please see Figure 5 , Figure 5 A graph showing the change in light emission efficiency of the display panel as a function of the size of the light emission aperture, provided in an embodiment of this application. Figure 5The three graphs in the image, from left to right, show the light extraction efficiency of the red, green, and blue light-emitting devices as a function of the corresponding light extraction aperture sizes. The horizontal axis represents the width of the bottom edge of the light extraction aperture 311 relative to the bottom edge of the pixel aperture 221, indicating whether it expands or contracts. Positive values ​​indicate the width of the bottom edge of the light extraction aperture 311 relative to the bottom edge of the pixel aperture 221, negative values ​​indicate the width of the bottom edge of the light extraction aperture 311 relative to the bottom edge of the pixel aperture 221, and 0 indicates that the bottom edge of the light extraction aperture 311 is flush with the bottom edge of the pixel aperture 221. The vertical axis represents the percentage increase in light extraction efficiency at a 0° viewing angle (i.e., a positive viewing angle).

[0092] Please see Figure 5 Taking a red light-emitting device as an example, when the size of the light-emitting opening 311 is equal to that of the pixel opening 221 (i.e., the bottom edge of the light-emitting opening 311 is flush with the bottom edge of the pixel opening 221), the light-emitting efficiency of the red light-emitting device is improved by the highest percentage. As the size of the light-emitting opening 311 gradually increases, the bottom edge of the light-emitting opening 311 gradually expands outward compared to the bottom edge of the pixel opening 221, and the light-emitting efficiency improvement percentage of the red light-emitting device gradually decreases. As the size of the light-emitting opening 311 gradually decreases, the bottom edge of the light-emitting opening 311 gradually contracts inward compared to the bottom edge of the pixel opening 221, and the light-emitting efficiency improvement percentage of the red light-emitting device also gradually decreases. The same applies to green and blue light-emitting devices, which will not be elaborated here.

[0093] In some embodiments, the refractive index of the first sub-light-emitting layer 31 is greater than or equal to 1.5 and less than or equal to 1.55, the refractive index of the second sub-light-emitting layer 32 is greater than or equal to 1.45 and less than or equal to 1.5, and the refractive index of the third sub-light-emitting layer 33 is greater than or equal to 1.55 and less than or equal to 1.65. For example, the refractive index of the first sub-light-emitting layer 31 is 1.5, the refractive index of the second sub-light-emitting layer 32 is 1.45, and the refractive index of the third sub-light-emitting layer 33 is 1.65; or, the refractive index of the first sub-light-emitting layer 31 is 1.55, the refractive index of the second sub-light-emitting layer 32 is 1.45, and the refractive index of the third sub-light-emitting layer 33 is 1.6. In this way, the third sub-light-emitting layer 33 and the second sub-light-emitting layer 32 can have a large refractive index difference, which can reduce the small critical angle at the interface between the third sub-light-emitting layer 33 and the second sub-light-emitting layer 32. This makes it easier for light to undergo total internal reflection at the interface between the third sub-light-emitting layer 33 and the second sub-light-emitting layer 32 on the sidewall of the light-emitting opening 311. This changes the light-emitting path of the light-emitting device, focusing the light that was originally dispersed to a wide viewing angle to a positive viewing angle, thereby improving the brightness of the display panel at the positive viewing angle and reducing the power consumption of the display panel.

[0094] In some embodiments, please refer to Figure 1The thickness of the second sub-light-emitting layer 32 is less than the thickness of the first sub-light-emitting layer 31, and the thickness of the third sub-light-emitting layer 33 is greater than the thickness of the first sub-light-emitting layer 31. It should be noted that the greater the depth of the light-emitting opening 311, the larger the area capable of achieving total internal reflection, resulting in a better light emission enhancement. However, increasing the depth of the light-emitting opening 311 also increases the difficulty for the third sub-light-emitting layer 33 to fill it. By making the thickness of the second sub-light-emitting layer 32 less than the thickness of the first sub-light-emitting layer 31, and the thickness of the third sub-light-emitting layer 33 greater than the thickness of the first sub-light-emitting layer 31, it is possible to ensure that the third sub-light-emitting layer 33 can completely fill the light-emitting opening 311 while simultaneously improving the brightness of the display panel at the viewing angle and reducing the power consumption of the display panel.

[0095] In some embodiments, please refer to Figure 1 The thickness of the first sub-light-emitting layer 31 is greater than or equal to 2 micrometers and less than or equal to 4 micrometers; the thickness of the second sub-light-emitting layer 32 is greater than or equal to 50 nanometers and less than or equal to 10% of the thickness of the first sub-light-emitting layer 31; and the thickness of the third sub-light-emitting layer 33 is greater than or equal to 10 micrometers and less than or equal to 30 micrometers. In this way, while ensuring that the third sub-light-emitting layer 33 can completely fill the light-emitting opening 311, the brightness at the viewing angle of the display panel can be improved, and the power consumption of the display panel can be reduced.

[0096] In some embodiments, the thickness of the first sub-light-emitting layer 31 is greater than or equal to 2.5 micrometers and less than or equal to 3.5 micrometers, and the thickness of the second sub-light-emitting layer 32 is greater than or equal to 75 nanometers and less than or equal to 8% of the thickness of the first sub-light-emitting layer 31.

[0097] In some embodiments, please refer to Figure 1 The display panel 100 also includes an encapsulation layer 6, which is disposed on the light-emitting device layer 2. The encapsulation layer 6 can be a single-layer encapsulation structure formed by organic or inorganic materials, or it can be a multi-layer thin-film encapsulation structure formed by at least two layers of inorganic materials and at least one layer of organic materials.

[0098] In some embodiments, please refer to Figure 1 The display panel 100 also includes a touch layer 7, which is disposed on the side of the encapsulation layer 6 away from the light-emitting device layer 2. The touch layer 7 may include one or more touch metal layers and at least one touch insulating layer. The light-emitting structure layer 3 is disposed on the side of the touch layer 7 away from the encapsulation layer 6, and the polarizing layer 4 is disposed on the side of the light-emitting structure layer 3 away from the touch layer 7.

[0099] In some embodiments, please refer to Figure 1The display panel 100 also includes a protective layer 8, which is disposed on the side of the polarizing layer 4 away from the light-emitting structure layer 3. An adhesive layer 9 is disposed between the protective layer 8 and the polarizing layer 4, and the adhesive layer 9 is used to attach the protective layer 8 to the polarizing layer 4.

[0100] In some embodiments, the protective layer 8 is made of glass, that is, the protective layer 8 is a glass cover.

[0101] In some embodiments, please refer to Figure 6 , Figure 6 This is a schematic diagram of the structure of a fourth display panel provided in an embodiment of this application, and its structure is similar to... Figure 1 The structures of the display panels shown are roughly the same, except that the display panel also includes a color filter layer 5, which is disposed between the light-emitting device layer 2 and the light-emitting structure layer 3. This can also improve the contrast of the display panel while improving the light-emitting efficiency.

[0102] It should be noted that the color resist in the color filter layer 5 can transmit light of a specific wavelength while absorbing or reflecting light of other wavelengths. If the color filter layer 5 is placed on the side of the light-emitting structure layer 3 away from the light-emitting device layer 2, the light whose path has been altered by the light-emitting structure layer 3 may be absorbed by the color resist in the color filter layer 5, resulting in a reduction in the improvement of light extraction efficiency. Therefore, placing the color filter layer 5 between the light-emitting device layer 2 and the light-emitting structure layer 3 not only helps to improve the contrast of the display panel but also helps to improve the light extraction efficiency of the display panel.

[0103] In some embodiments, please refer to Figure 6 The color filter layer 5 includes a light-shielding layer 51 and a color resist layer 52. The light-shielding layer 51 has multiple first openings, which are aligned with pixel openings and light-emitting openings. The color resist layer 52 is disposed in at least one of the first openings. The color resist layer 52 can transmit light of a specific color; for example, the color resist layer 52 may include red, green, and blue color resists. The light-shielding layer 51 can absorb visible light. The light-shielding layer 51 can be disposed between adjacent color resist layers 52 to prevent color mixing of light transmitted from adjacent color resist layers 52 of different colors. The material of the light-shielding layer 51 is black ink; the light-shielding layer 51 can also be referred to as a black matrix.

[0104] In some embodiments, please refer to Figure 5 The display panel 100 also includes an encapsulation layer 6 and a touch layer 7. The encapsulation layer 6 is disposed on the light-emitting device layer 2, the touch layer 7 is disposed on the side of the encapsulation layer 6 away from the light-emitting device layer 2, the color filter layer 5 is disposed on the side of the touch layer 7 away from the encapsulation layer 6, and the light-emitting structure layer 3 is disposed on the side of the color filter layer 5 away from the touch layer 7.

[0105] In some embodiments, please refer to Figure 6The display panel 100 also includes a cover layer 10 and a protective layer 8. The cover layer 10 is disposed on the light-emitting structure layer 3 away from the color filter layer 5. The protective layer 8 is disposed on the side of the cover layer 10 away from the light-emitting structure layer 3. An adhesive layer 9 is disposed between the protective layer 8 and the cover layer 10. The adhesive layer 9 is used to attach the protective layer 8 to the cover layer 10. The material of the cover layer 10 can be, but is not limited to, polyethylene terephthalate.

[0106] Based on the display panel provided in the above embodiments of this application, embodiments of this application also provide a display device. Please refer to [link to relevant documentation]. Figure 7 , Figure 7 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. The display device 1000 includes a display panel 100 and a housing 200. The display panel 100 is disposed on the housing 200. The display panel 100 can be any of the display panels provided in the above embodiments. The display device provided in the embodiments of this application can achieve the same technical effects as the display panels provided in any of the above embodiments, and will not be described in detail here.

[0107] The beneficial effects of the embodiments of this application are as follows: The embodiments of this application provide a display panel and a display device. The display panel includes an array substrate, a light-emitting device layer, and a light-emitting structure layer. By adding a light-emitting structure layer on the light-emitting device layer, a plurality of light-emitting openings aligned with the light-emitting devices are formed on a first sub-light-emitting layer in the light-emitting structure layer. At least a second sub-light-emitting layer covers the sidewalls of the light-emitting openings. A third sub-light-emitting layer is disposed on the second sub-light-emitting layer. The third sub-light-emitting layer includes a first sub-part and a second sub-part. The first sub-part fills the light-emitting openings, and the second sub-part is disposed on the side of the first sub-part away from the light-emitting device layer and outside the light-emitting openings. A polarizing layer is disposed on the surface of the second sub-part away from the first sub-part. By making the refractive index of the first sub-light-emitting layer less than that of the third sub-light-emitting layer, and the refractive index of the second sub-light-emitting layer less than that of the first sub-light-emitting layer, a large refractive index difference is achieved between the third sub-light-emitting layer and the second sub-light-emitting layer. This reduces the light emission of light from the second sub-light-emitting layer. The layer interface has a small critical angle, making it easier for light to undergo total internal reflection at the interface between the third and second sub-light-emitting layers on the sidewall of the light-emitting opening. This changes the light path of the light-emitting device, converging the light that was originally dispersed to a wide viewing angle to a positive viewing angle, thus improving the brightness of the display panel at the positive viewing angle. The material of the third sub-light-emitting layer has good leveling and adhesion. As long as the ratio of the thickness of the first sub-part to the second sub-part is greater than or equal to 1:3 and less than or equal to 1:10, it can be ensured that the first sub-part completely fills the light-emitting opening, avoiding the decrease in light-emitting efficiency of the display panel due to insufficient filling in the light-emitting opening. It can also make the surface of the second sub-part away from the first sub-part a flat surface, so that the polarizing layer can be directly pasted on the surface of the second sub-part away from the first sub-part. This can improve the bonding effect between the light-emitting structure layer and the polarizing layer, thereby increasing the light-emitting efficiency of the display panel while improving the process yield and reducing the power consumption of the display panel.

[0108] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0109] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0110] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0111] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display panel, characterized in that, The display panel includes: Array substrate; A light-emitting device layer is disposed on the array substrate, and the light-emitting device layer includes a plurality of light-emitting devices; A light-emitting structure layer is disposed on the light-emitting device layer, the light-emitting structure layer comprising: The first sub-light-emitting layer has multiple light-emitting openings, which are aligned with the light-emitting device. The second light-emitting layer at least covers the sidewall of the light-emitting opening; and A third sub-light-emitting layer is disposed on the second sub-light-emitting layer. The second sub-light-emitting layer includes a first sub-part and a second sub-part. The first sub-part fills the light-emitting opening, and the second sub-part is disposed on the side of the first sub-part away from the light-emitting device layer, and the second sub-part is located outside the light-emitting opening. The display panel further includes a polarizing layer disposed on the surface of the second sub-part away from the first sub-part. The ratio of the thickness of the first sub-part to that of the second sub-part is greater than or equal to 1:3 and less than or equal to 1:

10. The refractive index of the first sub-light-emitting layer is less than that of the third sub-light-emitting layer, and the refractive index of the second sub-light-emitting layer is less than that of the first sub-light-emitting layer.

2. The display panel as described in claim 1, characterized in that, The light-emitting opening gradually expands from one end near the light-emitting device layer to the end away from the light-emitting device layer, and the size of the first sub-part is adapted to the size of the light-emitting opening.

3. The display panel as described in claim 1, characterized in that, The cross-sectional shape of the light-emitting opening is an inverted trapezoid, and the cross-sectional shape of the first sub-part is the same as that of the light-emitting opening.

4. The display panel as described in claim 1, characterized in that, The angle between the sidewall of the light-emitting opening and the surface of the first sub-light-emitting layer near the light-emitting device layer is greater than or equal to 60 degrees and less than 90 degrees. The angle between the sidewall of the light-emitting opening and the surface of the first sub-light-emitting layer near the light-emitting device layer is complementary to the bottom angle of the first sub-part.

5. The display panel as described in claim 1, characterized in that, The light-emitting device layer includes a pixel definition layer, which has multiple pixel openings, and the light-emitting device is disposed in the corresponding pixel opening; Wherein, the bottom edge of the light-emitting opening is extended outward relative to the bottom edge of the pixel opening, and the outward extension width is greater than or equal to 0 and less than or equal to 2 micrometers; or, the bottom edge of the light-emitting opening is recessed inward relative to the bottom edge of the pixel opening, and the recessed width is greater than or equal to 0 and less than or equal to 1 micrometer.

6. The display panel as described in claim 1, characterized in that, The refractive index of the first sub-light-emitting layer is greater than or equal to 1.5 and less than or equal to 1.55, the refractive index of the second sub-light-emitting layer is greater than or equal to 1.45 and less than or equal to 1.5, and the refractive index of the third sub-light-emitting layer is greater than or equal to 1.55 and less than or equal to 1.

65.

7. The display panel as described in claim 1, characterized in that, The thickness of the second sub-light-emitting layer is less than the thickness of the first sub-light-emitting layer, and the thickness of the third sub-light-emitting layer is greater than the thickness of the first sub-light-emitting layer.

8. The display panel as described in claim 7, characterized in that, The thickness of the first sub-light-emitting layer is greater than or equal to 2 micrometers and less than or equal to 4 micrometers, the thickness of the second sub-light-emitting layer is greater than or equal to 50 nanometers and less than or equal to 10% of the thickness of the first sub-light-emitting layer, and the thickness of the third sub-light-emitting layer is greater than or equal to 10 micrometers and less than or equal to 30 micrometers.

9. The display panel as claimed in claim 1, characterized in that, The material of the third sub-light-emitting layer has an initial tack greater than 2N at room temperature.

10. The display panel as claimed in claim 1, characterized in that, The material of the third sub-light-emitting layer has an elastic modulus greater than 1N / 25mm at 80℃.

11. The display panel as claimed in claim 1, characterized in that, The loss tangent of the material of the third sub-light-emitting layer at temperatures between 25°C and 85°C is greater than or equal to 0.05 and less than or equal to 0.

5.

12. The display panel as claimed in claim 1, characterized in that, The material of the third sub-light-emitting layer has an elastic modulus at room temperature greater than or equal to 30 kPa and less than or equal to 200 kPa.

13. The display panel as claimed in claim 1, characterized in that, The material of the third sub-light-emitting layer has an elastic modulus greater than or equal to 10 kPa at 85°C.

14. The display panel as claimed in claim 1, characterized in that, The material of the first sub-light-emitting layer includes epoxy resin; the material of the second sub-light-emitting layer includes any one of polyurethane without active groups, acrylic without active groups, and silicone without active groups; and the material of the third sub-light-emitting layer includes any one of polyurethane with active groups, acrylic with active groups, and silicone with active groups.

15. The display panel as claimed in claim 1, characterized in that, The second sub-light-emitting layer is continuously disposed on the surface of the first sub-light-emitting layer away from the light-emitting device layer, the sidewall of the light-emitting opening, and the bottom. The third sub-light-emitting layer is disposed entirely on the surface of the second sub-light-emitting layer away from the light-emitting device layer.

16. The display panel as claimed in claim 1, characterized in that, The display panel further includes a color filter layer, which is disposed between the light-emitting device layer and the light-emitting structure layer.

17. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 16.

Images