Display panel and display device

Abstract

The invention provides a display panel and a display device.The display panel comprises a substrate, a pixel definition layer, a light-emitting layer and a light extraction layer, the pixel definition layer is located on one side of the substrate, and the pixel definition layer is provided with a first opening; the light-emitting layer is located on one side of the substrate and located in the first opening; the light extraction layer is located on the side, away from the substrate, of the light emitting layer, the light extraction layer is provided with a second opening, the first opening and the second opening are overlapped, and the reflectivity of the side wall, where the second opening is formed, of the light extraction layer is larger than that of any other surface of the light extraction layer. The display panel solves the technical problem of how to improve the luminous efficiency.

Description

Technical Field

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

[0002] Micro Lens Panel (MLP) technology is a technology in the display field, which is mainly used to increase the brightness of OLED screens and reduce power consumption. MLP technology prepares a micro lens on the light-emitting layer of each sub-pixel of OLED, and uses a high refractive index material to refract the light emitted by the light-emitting layer at the lens interface to achieve light focusing. This technology changes the optical path design to focus the light scattered to the side of the screen to the front of the screen, thereby increasing the front brightness. However, the introduction of the above-mentioned MLP technology will affect the light output efficiency of the display panel.

[0003] Therefore, there is an urgent need for a display panel that can solve the technical problem of unsatisfactory light extraction efficiency of display panels in the prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a display panel and a display device to solve the problem of how to improve light extraction efficiency in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a display panel, comprising: a base substrate; a pixel definition layer located on one side of the base substrate, the pixel definition layer having a first opening; a light emitting layer located on one side of the base substrate and within the first opening; a light extraction layer located on a side of the light emitting layer away from the base substrate, the light extraction layer having a second opening, the first opening overlapping the second opening, and the reflectivity of the side wall of the light extraction layer forming the second opening being greater than the reflectivity of any other surface of the light extraction layer.

[0006] Further, the width of the second opening at one end away from the base substrate in the first direction is a first width, the width of the second opening at one end close to the base substrate in the first direction is a second width, the first width is greater than the second width, and the first direction is perpendicular to the thickness direction of the base substrate.

[0007] Further, a cross-sectional shape of the side wall of the light extraction layer in a second direction includes at least one of a straight line segment and a curved line segment, and the second direction is the same as a thickness direction of the base substrate.

[0008] Furthermore, the light extraction layer includes a plurality of optical parts with intervals and a reflective layer at least partially located on the sidewalls of the optical parts, the second opening is formed between two adjacent optical parts, and the reflectivity of the reflective layer is 85% to 95%.

[0009] Furthermore, the reflective layer is also located on a portion of the surface of the light extraction layer at both sides of the second opening.

[0010] Further, the center of gravity of the first opening coincides with the center of gravity of the second opening, the width of the second opening at one end away from the base substrate in the first direction is a first width, the width of the second opening at one end close to the base substrate in the first direction is a second width, the width of the first opening along the first direction is a third width, the third width is smaller than the first width, the third width is smaller than the second width, and the first direction is perpendicular to the thickness direction of the base substrate.

[0011] Furthermore, the display panel further includes: a first encapsulation layer located in the second opening and on the surface of the light extraction layer at both sides of the second opening.

[0012] Furthermore, an average thickness of the first encapsulation layer on the surface of the light extraction layer at both sides of the second opening is a first thickness, an average thickness of the light extraction layer is a second thickness, and the first thickness is less than the second thickness.

[0013] Furthermore, the material of the first encapsulation layer is an organic material.

[0014] Furthermore, the display panel further includes: a second encapsulation layer located between the light emitting layer and the light extraction layer and between the pixel definition layer and the light extraction layer; and a third encapsulation layer located on a side of the first encapsulation layer away from the base substrate.

[0015] Furthermore, materials of the second encapsulation layer and the third encapsulation layer are respectively inorganic materials.

[0016] Furthermore, the display panel also includes: a touch layer, the touch layer is located on the side of the light extraction layer away from the base substrate, the touch layer includes a first metal layer and a second metal layer, the second metal layer is located on the side of the first metal layer away from the light extraction layer, the second metal layer includes a plurality of metal parts with intervals, and a third opening is formed between two adjacent metal parts.

[0017] Further, the center of gravity of the first opening, the center of gravity of the second opening, and the center of gravity of the third opening coincide with each other, the width of the second opening at the end away from the base substrate in the first direction is the first width, the width of the second opening at the end close to the base substrate in the first direction is the second width, the width of the first opening along the first direction is the third width, the width of the third opening along the first direction is the fourth width, the fourth width is smaller than the first width, the fourth width is larger than the second width, the fourth width is larger than the third width, and the first direction is perpendicular to the thickness direction of the base substrate.

[0018] Furthermore, in order to achieve the above objective, according to one aspect of the present invention, there is provided a display device, comprising: any one of the above-mentioned display panels.

[0019] By applying the technical solution of the present invention, a display panel is provided. By setting the light extraction layer near the light emitting layer, the light emitted from the light emitting layer can be directly irradiated on the light extraction layer. Compared with the prior art, the present solution does not need to pass through other film layers such as the encapsulation layer, the touch layer, and the filter layer, thereby greatly reducing the light loss caused by film layer absorption, film layer interface reflection or total reflection, increasing the amount of light incident on the light extraction layer, achieving a focusing effect, and significantly improving the light extraction efficiency of the panel. In addition, since the side wall of the light extraction layer has a high reflectivity, the light irradiated on the side wall is completely reflected to the second opening for emission, achieving a focusing effect, significantly improving the light extraction efficiency of the panel, and solving the technical problem of how to improve the light extraction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 A schematic structural diagram of a display panel provided according to an embodiment of the present invention is shown;

[0022] Figure 2 A schematic structural diagram of a display panel provided according to an embodiment of the present invention is shown;

[0023] Figure 3 A schematic structural diagram of a display panel provided according to an embodiment of the present invention is shown;

[0024] Figure 4 A schematic structural diagram of a display panel provided according to an embodiment of the present invention is shown;

[0025] Figure 5A schematic structural diagram of a display panel provided according to an embodiment of the present invention is shown;

[0026] Figure 6 A schematic structural diagram of a display panel provided according to an embodiment of the present invention is shown;

[0027] Figure 7 A schematic structural diagram of a display panel provided according to an embodiment of the present invention is shown;

[0028] Figure 8 A schematic structural diagram of a display panel provided according to an embodiment of the present invention is shown;

[0029] Fig. 9 A schematic structural diagram of a display panel provided according to an embodiment of the present invention is shown;

[0030] Fig.10 A schematic structural diagram of a display device provided according to an embodiment of the present invention is shown.

[0031] The above drawings include the following reference numerals:

[0032] 10. Base substrate; 20. Pixel definition layer; 201. First opening; 30. Light emitting layer; 40. Light extraction layer; 401. Second opening; 402. Optical part; 403. Reflective layer; W1. First width; W2. Second width; W3. Third width; W4. Fourth width; 50. First encapsulation layer; H1. First thickness; H2. Second thickness; 60. Second encapsulation layer; 70. Third encapsulation layer; 80. Touch layer; 801. First metal layer; 802. Second metal layer; 803. Metal part; 804. Third opening; 81. Insulating layer; 82. Organic layer; 83. Polarizing layer; 90. Display panel. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] As introduced in the background technology, the use of MLP in the prior art leads to a decrease in the light extraction efficiency of the display panel. In order to solve the above technical problems, the present application proposes a display panel and a display device.

[0037] Figure 1 is a schematic diagram of the structure of a display panel according to an embodiment of the present application. Figures 1 to 9 As shown, including:

[0038] Base substrate 10;

[0039] The pixel definition layer 20 is located on one side of the base substrate 10 , and the pixel definition layer 20 has a first opening 201 ;

[0040] The light emitting layer 30 is located on one side of the base substrate 10 and in the first opening 201;

[0041] The light extraction layer 40 is located on the side of the light emitting layer 30 away from the base substrate 10. The light extraction layer 40 has a second opening 401. The first opening 201 overlaps with the second opening 401. The reflectivity of the side wall of the light extraction layer 40 forming the second opening 401 is greater than the reflectivity of any other surface of the light extraction layer 40.

[0042] Specifically, the pixel definition layer 20 is used to define the specific position of the sub-pixel. The pixel definition layer 20 includes a plurality of pixel definition parts, and a first opening 201 is formed between two adjacent pixel definition parts. The average thickness of the light-emitting layer 30 is less than the average thickness of the pixel definition layer 20. The light extraction layer 40 is used to reflect the light emitted from the light-emitting layer 30. The first opening 201 and the second opening 401 may overlap partially or completely. The light extraction layer 40 has a surface parallel to the substrate 10 and a surface not parallel to the substrate. The surface parallel to the substrate includes a surface close to the substrate 10 and a surface away from the substrate 10. The surface not parallel to the substrate 10 includes a surface perpendicular to the substrate 10 and a surface intersecting with the substrate 10, i.e., a surface of the side wall of the light extraction layer 40.

[0043] The display panel in the above embodiment, by setting the light extraction layer near the light emitting layer, can make the light emitted by the light emitting layer directly irradiate the light extraction layer. Compared with the prior art, this solution does not need to pass through other film layers such as the encapsulation layer, the touch layer, and the filter layer, thereby greatly reducing the light loss caused by film layer absorption, film layer interface reflection or total reflection, increasing the amount of light incident on the light extraction layer, achieving a focusing effect, and significantly improving the light extraction efficiency of the panel. In addition, since the side wall of the light extraction layer has a high reflectivity, the focusing effect is achieved by reflecting all the light irradiated on the side wall to the second opening for emission, significantly improving the light extraction efficiency of the panel, and solving the technical problem of how to improve the light extraction efficiency.

[0044] In some embodiments, Figure 1 As shown, the width of the second opening 401 at one end away from the base substrate 10 in the first direction is the first width W1, that is, the width of the top of the second opening 401, and the width of the second opening 401 at one end close to the base substrate 10 in the first direction is the second width W2, that is, the width of the bottom of the second opening 401. The first width W1 is greater than the second width W2, that is, the side wall of the second opening 401 is inclined. The first direction is perpendicular to the thickness direction of the base substrate 10. The width of the second opening 401 away from the base substrate 10 is greater than the width of the second opening 401 close to the base substrate 10, which can further increase the amount of reflected light, thereby improving the focusing effect, and further improving the light extraction efficiency of the display panel.

[0045] In practical applications, the display substrate can be configured such that the sidewall is perpendicular to the base substrate, or the second width is smaller than the second width. However, compared to the above configuration, the sidewall of the second opening is configured to be inclined, and the first width is larger than the second width, that is, the second opening is configured to be wide at the top and narrow at the bottom, so that light from the light-emitting layer in a wider angle range is incident on the light extraction layer, which can improve the light extraction efficiency to a greater extent, thereby further improving the light extraction efficiency of the display panel.

[0046] In some other specific embodiments, Figure 2 As shown, the cross-sectional shape of the sidewall of the light extraction layer 40 in the second direction includes at least one of a straight line segment and a curved line segment, and the second direction is the same as the thickness direction of the base substrate 10. When the cross-sectional shape of the sidewall of the light extraction layer 40 in the second direction includes at least a curved line segment, compared with a shape including only a straight line segment, it has a larger surface area, which can further increase the amount of reflected light, thereby improving the focusing effect, and further improving the light extraction efficiency of the display panel.

[0047] In practical applications, the cross-sectional shape of the side wall of the light extraction layer in the second direction may be as follows: Figure 2 The concave shape shown can also be convex and other irregular shapes.

[0048] like Figure 3 As shown, in some other embodiments, the light extraction layer 40 includes a plurality of optical portions 402 with intervals and a reflective layer 403 at least partially located on the sidewall of the optical portion 402. The reflective layer 403 may be located on the entire surface of the sidewall or on a partial surface of the sidewall. The second opening 401 is formed between two adjacent optical portions 402. The reflectivity of the reflective layer 403 is 85% to 95%. Providing the reflective layer 403 on the sidewall of the optical portion 402 can increase the reflectivity of the sidewall of the optical portion 402, further increase the amount of reflected light, thereby improving the light focusing effect, and further improving the light extraction efficiency of the display panel.

[0049] In practical applications, the reflective layer can be deposited on the side wall of the optical part by evaporation or photolithography. In another specific embodiment, the reflective layer can be a mirror reflection layer. Mirror reflection means that when a beam of parallel light is projected onto a plane mirror, the reflected light is still parallel. The material of the mirror reflection layer can be one or more of glass, metal, plastic, polished stone, borosilicate glass, fused quartz and microcrystalline glass. The reflectivity of mirror reflection is usually very high, and its reflectivity will vary depending on the material and surface treatment. The reflectivity of a general mirror is between 85% and 90%, while a high-quality silver-coated glass mirror can reach a reflectivity of about 95%.

[0050] In order to further prevent the occurrence of light leakage, Figure 4 As shown, the reflective layer 403 is also located on a portion of the surface of the light extraction layer 40 on both sides of the second opening 401. In practical applications, the area of ​​the reflective layer 403 on the portion of the surface of the light extraction layer 40 on both sides of the second opening 401 should not be too large, and the area of ​​the reflective layer 403 on the portion of the surface of the light extraction layer 40 on both sides of the second opening 401 is smaller than the area of ​​the reflective layer 403 on the sidewall.

[0051] Specifically, when part of the light is emitted onto the partial surface of the light extraction layer on both sides of the second opening, the reflective layer disposed on the partial surface of the light extraction layer on both sides of the second opening can improve the reflectivity of the part of the light.

[0052] In some other embodiments, Figure 1 As shown, the center of gravity of the first opening 201 coincides with the center of gravity of the second opening 401, the width of the end of the second opening 401 away from the base substrate 10 in the first direction is the first width W1, the width of the end of the second opening 401 close to the base substrate 10 in the first direction is the second width W2, the width of the first opening 201 along the first direction is the third width W3, that is, the average width of the first opening 201 along the first direction, the third width W3 is smaller than the first width W1, the third width W3 is smaller than the second width W2, and the first direction is perpendicular to the thickness direction of the base substrate 10. The width of the first opening 201 is smaller than the width of the second opening 401, so that the light extraction layer can receive the light emitted by the light emitting layer to the maximum extent, further increase the amount of reflected light, thereby improving the focusing effect, and further improving the light extraction efficiency of the display panel.

[0053] Specifically, the third width is smaller than an average width of the second opening along the first direction.

[0054] In some further embodiments, the display panel further comprises: Figure 5 As shown, the first encapsulation layer 50 is located in the second opening 401 and on the surface of the light extraction layer 40 on both sides of the second opening 401. The first encapsulation layer 50 and the light extraction layer 40 together constitute the MLP structure, and the light emitted by the light emitting layer 30 is refracted at the lens interface by using a high refractive index material to achieve focusing of the light. The first encapsulation layer 50 can play a flattening role. Since the morphology of the light extraction layer 40 is uneven, the first encapsulation layer 50 can fill the second opening 401, further preventing the introduction of impurities during the manufacturing process of the display panel.

[0055] Specifically, due to the setting of the second opening in the above-mentioned light extraction layer, different layer patterns will cause in-plane step differences. The material of the above-mentioned first encapsulation layer includes at least one of an organic material and an inorganic material. The organic material includes at least one of an acrylic resin, an epoxy resin and a silicone resin, and the inorganic material includes at least one of silicon dioxide, magnesium fluoride, calcium fluoride and barium fluoride. In addition, polyimide material or polymethyl methacrylate material can also be used as the above-mentioned first encapsulation layer because it has good thermal stability, good insulation, high mechanical strength and other performance characteristics.

[0056] In another specific embodiment, Figure 5 As shown, the average thickness of the first encapsulation layer 50 on the surface of the light extraction layer 40 on both sides of the second opening 401 is the first thickness H1, and the average thickness of the light extraction layer 40 is the second thickness H2, and the first thickness H1 is less than the second thickness H2. Within the process capability range, and when the sum of the first thickness H1 and the second thickness H2 remains unchanged, the smaller the first thickness H1, the larger the second thickness H2. Therefore, the larger the area of ​​the reflective layer located on the side wall of the light extraction layer 40, the more the amount of reflected light can be increased, thereby improving the focusing effect, and thus improving the light extraction efficiency of the display panel.

[0057] In another specific embodiment, the first thickness may be zero.

[0058] In another specific embodiment, the material of the first encapsulation layer is an organic material. The first encapsulation layer can play the role of a flat layer. Using an organic material as the flat layer can further improve the electrical performance of the first encapsulation layer, block surface water and oxygen corrosion, improve the reliability of the light extraction layer that is sensitive to water vapor and oxygen, and increase the service life of the light extraction layer, thereby further increasing the service life of the display panel.

[0059] Specifically, the above-mentioned organic material can be one or more of acrylic resin, epoxy resin, silicone resin, polystyrene prepolymer, polyimide material, polymethyl methacrylate and the like, and those skilled in the art can select and set them according to actual conditions.

[0060] In another specific embodiment, Figure 6As shown, the display panel further includes: a second encapsulation layer 60, located between the light emitting layer 30 and the light extraction layer 40 and between the pixel definition layer 20 and the light extraction layer 40; and a third encapsulation layer 70, located on a side of the first encapsulation layer 50 away from the base substrate 10. The second encapsulation layer 60 and the third encapsulation layer 70 are used to block moisture or gas from entering the light extraction layer 40, to prevent the light extraction layer 40 from deteriorating and affecting the reflection effect of the light extraction layer 40. Therefore, the second encapsulation layer 60 and the third encapsulation layer 70 can protect the light extraction layer 40, thereby improving the display effect of the display panel.

[0061] Specifically, the second encapsulation layer can be used to protect the surface of the light extraction layer close to the substrate, and the second encapsulation layer can also be used to protect the pixel definition layer and the light emitting layer. The second encapsulation layer can be used to protect the surface of the light extraction layer away from the substrate.

[0062] In another embodiment, the materials of the second encapsulation layer and the third encapsulation layer are inorganic materials. It should be noted that, due to the influence of material properties, the water and oxygen barrier capacity of inorganic materials is better than that of organic materials. The use of inorganic materials in the second encapsulation layer and the third encapsulation layer can further improve the water and oxygen barrier capacity, thereby further improving the encapsulation effect of the second encapsulation layer and the third encapsulation layer.

[0063] Specifically, the above-mentioned inorganic material can be one or more of silicon nitride, silicon oxide, silicon oxynitride or silicon carbide. The material of the second encapsulation layer can also be aluminum oxide. The aluminum oxide formed by the atomic layer deposition process has a strong water and oxygen barrier ability and a small thickness. It can obtain an effective water and oxygen blocking effect with a smaller thickness. On the one hand, when the light extraction layer located on the second encapsulation layer is formed by the inkjet printing process, it can prevent the water vapor in the printed droplets from invading the light-emitting layer, and the light-emitting layer can be prevented from being damaged. On the other hand, the second encapsulation layer is a film layer arranged between the light-emitting layer and the light extraction layer. Its small thickness can reduce the distance between the light extraction layer and the corresponding light-emitting layer, so that the propagation direction of more light is adjusted by the light extraction layer, which is beneficial to the improvement of the light extraction efficiency of the display panel.

[0064] In some embodiments, Figure 7As shown, the display panel further includes: a touch layer 80, the touch layer 80 is located on the side of the light extraction layer 40 away from the base substrate 10, the third encapsulation layer is formed before the touch layer 80, and when the touch layer 80 is formed by a thin film deposition process, the third encapsulation layer can be used as a substrate of the touch layer 80. The touch layer 80 includes a first metal layer 801 and a second metal layer 802, the second metal layer 802 is located on the side of the first metal layer 801 away from the light extraction layer 40, the second metal layer 802 includes a plurality of metal parts 803 with intervals, and a third opening 804 is formed between two adjacent metal parts 803. The setting of the touch layer 80 can further increase the human-computer interaction function for the display panel.

[0065] In practical applications, the touch layer can adopt the touch panel technology on the thin film encapsulation layer (Touch Panel On TFE, referred to as TPOT), which means that the touch layer is made on the thin film encapsulation layer. Compared with the traditional touch display panel, the touch structure and the display structure in the TPOT technology are stacked to avoid the mutual influence between touch and display, and improve the display effect and touch effect. In addition, since the touch structure and the display structure are not arranged in the same layer, the wiring in the touch structure and the wiring in the display structure are respectively arranged in different film layers, which is conducive to the realization of a narrow frame. In addition, TPOT technology helps to realize flexible display panel technology, reduce the thickness of the screen, and has cost advantages. It should be noted that the first encapsulation layer, the second encapsulation layer and the third encapsulation layer together constitute a packaging structure for protecting the light extraction layer, and a plurality of signal lines are arranged on the side of the packaging structure close to the display substrate. In practical applications, the thickness of the above-mentioned packaging structure should not be too small. When the thickness of the packaging structure is too small, the electrical signals on the multiple signal lines will cause signal interference to the above-mentioned touch layer, thereby reducing the touch performance of the touch layer. The above-mentioned post-encapsulation structure adjustment can be achieved by reasonably setting the thickness of the above-mentioned first encapsulation layer, the second encapsulation layer and the third encapsulation layer to avoid a reduction in the distance between the touch layer and each signal line, thereby avoiding a deterioration in the touch performance of the touch layer.

[0066] In order to further prevent the light leakage phenomenon, in another embodiment, as Figure 8As shown, the center of gravity of the first opening 201, the center of gravity of the second opening 401 and the center of gravity of the third opening 804 coincide with each other, the width of the end of the second opening 401 away from the base substrate 10 in the first direction is the first width W1, the width of the end of the second opening 401 close to the base substrate 10 in the first direction is the second width W2, the width of the first opening 201 along the first direction is the third width W3, that is, the average width of the first opening 201 along the first direction, the width of the third opening 804 along the first direction is the fourth width W4, that is, the average width of the third opening 804 along the first direction, the fourth width W4 is smaller than the first width W1, the fourth width W4 is larger than the second width W2, the fourth width W4 is larger than the third width W3, and the first direction is perpendicular to the thickness direction of the base substrate 10.

[0067] Specifically, Fig. 9 As shown, the display panel further includes an insulating layer 81, an organic layer 82 and a polarizing layer 83, wherein the insulating layer 81 is located between the first metal layer 801 and the second metal layer 802, and the insulating layer is used to achieve insulation between the first metal layer 801 and the second metal layer 802. The organic layer 82 is located on the side of the second metal layer 802 away from the base substrate 10. The polarizing layer 83 is located on the side of the organic layer 82 away from the base substrate 10. The main function of the polarizing layer 83 is to convert natural light without polarization into polarized light, control the passage of light, and thus improve the transmittance and display effect. Specifically, the polarizing layer 83 allows light with the same polarization direction to pass through, and prevents light with different polarization directions from passing through. The orthographic projection of the metal part 803 on the base substrate 10 overlaps at least partially with the orthographic projection of the reflective layer 403 on the base substrate 10. The refractive index of the organic layer 82 is greater than the refractive index of the first encapsulation layer 50, and the refractive index of the organic layer 82 is greater than 1.7.

[0068] In another typical embodiment of the present application, Fig.10 As shown, a display device is provided, including: any one of the above-mentioned display panels 90. The specific structure of the display panel 90 has been described in detail in the above-mentioned embodiments, and will not be repeated here. Fig.10 The display device shown is only for illustration purposes, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a laptop computer, an e-reader, or a television.

[0069] Since the display device provided by the embodiment of the application includes the above-mentioned display panel, by adopting the display device, by setting the light extraction layer at a position close to the light emitting layer, the light emitted by the light emitting layer can be directly irradiated on the light extraction layer. Compared with the prior art, this solution does not need to pass through other film layers such as the encapsulation layer, the touch layer, and the filter layer, thereby greatly reducing the light loss caused by film layer absorption, film layer interface reflection or total reflection, increasing the amount of light incident on the light extraction layer, achieving a focusing effect, and significantly improving the light extraction efficiency of the panel. In addition, since the side wall of the light extraction layer has a high reflectivity, by reflecting all the light irradiated on the side wall to the second opening for emission, a focusing effect is achieved, which significantly improves the light extraction efficiency of the panel and solves the technical problem of how to improve the light extraction efficiency.

[0070] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0071] 1) The display panel of the present application sets the light extraction layer near the light emitting layer, so that the light emitted by the light emitting layer can be directly irradiated on the light extraction layer. Compared with the prior art, this solution does not need to pass through other film layers such as the encapsulation layer, the touch layer, and the filter layer, thereby greatly reducing the light loss caused by film absorption, film interface reflection or total reflection, increasing the amount of light incident on the light extraction layer, achieving a focusing effect, and significantly improving the light extraction efficiency of the panel. In addition, since the side wall of the light extraction layer has a high reflectivity, the light irradiated on the side wall is completely reflected to the second opening for emission, achieving a focusing effect, significantly improving the light extraction efficiency of the panel, and solving the technical problem of how to improve the light extraction efficiency.

[0072] 2) The display device of the present application includes a display panel. The display panel sets the light extraction layer at a position close to the light emitting layer, so that the light emitted by the light emitting layer can be directly irradiated on the light extraction layer. Compared with the prior art, the present solution does not need to pass through other film layers such as the encapsulation layer, the touch layer, and the filter layer, thereby greatly reducing the light loss caused by film layer absorption, film layer interface reflection or total reflection, increasing the amount of light incident on the light extraction layer, achieving a focusing effect, and significantly improving the light extraction efficiency of the panel. In addition, since the side wall of the light extraction layer has a high reflectivity, the light irradiating on the side wall is completely reflected to the second opening for emission, thereby achieving a focusing effect, significantly improving the light extraction efficiency of the panel, and solving the technical problem of how to improve the light extraction efficiency.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A display panel, characterized in that: include: substrate substrate; A pixel definition layer, located on one side of the base substrate, and having a first opening; A light emitting layer, located on one side of the base substrate and in the first opening; The light extraction layer is located on the side of the light emitting layer away from the base substrate, the light extraction layer has a second opening, the first opening overlaps with the second opening, and the reflectivity of the side wall of the light extraction layer forming the second opening is greater than the reflectivity of any other surface of the light extraction layer.

2. The display panel according to claim 1, characterized in that: The width of the second opening at one end away from the base substrate in the first direction is a first width, and the width of the second opening at one end close to the base substrate in the first direction is a second width, the first width is greater than the second width, and the first direction is perpendicular to the thickness direction of the base substrate.

3. The display panel according to claim 1, characterized in that: A shape of a cross section of the side wall of the light extraction layer in a second direction includes at least one of a straight line segment and a curved line segment, and the second direction is the same as a thickness direction of the base substrate.

4. The display panel according to claim 1, characterized in that: The light extraction layer includes a plurality of optical parts with intervals and a reflective layer at least partially located on the sidewalls of the optical parts, the second opening is formed between two adjacent optical parts, and the reflectivity of the reflective layer is 85% to 95%.

5. The display panel according to claim 4, characterized in that: The reflective layer is also located on a portion of the surface of the light extraction layer at both sides of the second opening.

6. The display panel according to claim 1, characterized in that: The center of gravity of the first opening coincides with the center of gravity of the second opening, the width of the second opening at one end away from the base substrate in the first direction is a first width, the width of the second opening at one end close to the base substrate in the first direction is a second width, the width of the first opening along the first direction is a third width, the third width is smaller than the first width, the third width is smaller than the second width, and the first direction is perpendicular to the thickness direction of the base substrate.

7. The display panel according to claim 1, characterized in that: The display panel further includes: The first encapsulation layer is located in the second opening and on the surface of the light extraction layer at both sides of the second opening.

8. The display panel according to claim 7, characterized in that: The average thickness of the first encapsulation layer on the surface of the light extraction layer at both sides of the second opening is a first thickness, the average thickness of the light extraction layer is a second thickness, and the first thickness is less than the second thickness.

9. The display panel according to claim 7, characterized in that: The material of the first encapsulation layer is an organic material.

10. The display panel according to claim 7, characterized in that: The display panel further includes: a second encapsulation layer, located between the light emitting layer and the light extraction layer and between the pixel definition layer and the light extraction layer; The third packaging layer is located on a side of the first packaging layer away from the substrate.

11. The display panel according to claim 10, characterized in that: The materials of the second encapsulation layer and the third encapsulation layer are respectively inorganic materials.

12. The display panel according to claim 1, characterized in that: The display panel further includes: A touch layer, wherein the touch layer is located on a side of the light extraction layer away from the base substrate, the touch layer includes a first metal layer and a second metal layer, the second metal layer is located on a side of the first metal layer away from the light extraction layer, the second metal layer includes a plurality of metal parts with intervals, and a third opening is formed between two adjacent metal parts.

13. The display panel according to claim 12, characterized in that: The center of gravity of the first opening, the center of gravity of the second opening, and the center of gravity of the third opening coincide with each other; the width of the end of the second opening away from the base substrate in the first direction is the first width; the width of the end of the second opening close to the base substrate in the first direction is the second width; the width of the first opening along the first direction is the third width; the width of the third opening along the first direction is the fourth width; the fourth width is smaller than the first width; the fourth width is larger than the second width; the fourth width is larger than the third width; and the first direction is perpendicular to the thickness direction of the base substrate.

14. A display device, characterized in that: include: A display panel as claimed in any one of claims 1 to 13.

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