Display panel and display device thereof

Abstract

This application provides a display panel and a display device thereof. The display panel includes: a substrate; a pixel definition layer disposed on one side of the substrate, the pixel definition layer including a pixel defining portion and a plurality of pixel openings formed by the pixel defining portion, the plurality of pixel openings being arranged in multiple columns; a light-emitting device layer disposed at least within the pixel openings along a direction away from the substrate, the light-emitting device layer including a first electrode layer, a light-emitting functional layer and a second electrode layer stacked sequentially; and a first optical adjustment structure at least partially located within the pixel openings and spaced apart on the sidewall of the pixel defining portion facing the light-emitting surface of the display panel; wherein the sidewall of the first optical adjustment structure is a concave arc surface, and the first optical adjustment structure at least adjusts the emission direction of the light emitted by the light-emitting functional layer. By providing a first optical adjustment structure with a concave arc surface sidewall, this application achieves the reflection and recovery of large-angle light emitted by the light-emitting functional layer, converting it into small-angle light, thereby improving the light utilization efficiency, increasing display brightness, and improving the viewing angle characteristics of the display panel. Simultaneously, the provision of the first optical adjustment structure provides a good optical path foundation for subsequent realization of naked-eye 3D display.

Description

Technical Field

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

[0002] Glasses-free 3D display technology is a technique that utilizes the characteristics of binocular parallax to create realistic stereoscopic images with spatial depth without the need for any auxiliary equipment (such as 3D glasses). Due to the realistic and vivid expressiveness, good environmental immersion, and strong visual impact of the stereoscopic images displayed by glasses-free 3D display devices, their applications are becoming increasingly widespread.

[0003] The inventors of this application have discovered that in existing naked-eye 3D display devices, the lenses are difficult to achieve ideal imaging, and the outgoing light has aberrations. Moreover, the larger the angle of the incident light, the greater the aberrations, resulting in reduced 3D image clarity and prominent crosstalk between the left and right eye images. Summary of the Invention

[0004] This application provides a display panel and display device thereof. By setting the sidewall of the pixel definition limiting part as a concave arc surface and setting a first optical adjustment structure on the side of the concave arc surface facing the light-emitting surface of the display panel, the first optical adjustment structure reflects the large-angle light emitted by the light-emitting functional layer into small-angle light, thereby reducing the aberration generated when the light is incident on the cylindrical lens layer and reducing the crosstalk between the left and right eye images.

[0005] A first aspect of this application provides a display panel, comprising: a substrate; a pixel defining layer disposed on one side of the substrate, the pixel defining layer including a pixel defining portion and a plurality of pixel openings enclosed by the pixel defining portion, the plurality of pixel openings being arranged in an array, the pixel openings having a first surface close to the substrate and a second surface away from the substrate; a light-emitting device layer at least partially disposed within the pixel openings along a direction away from the substrate, the light-emitting device layer including a first electrode layer, a light-emitting functional layer, and a second electrode layer stacked sequentially; and a first optical adjustment structure at least partially located within the pixel openings and disposed on the sidewall of the pixel defining portion facing the light-emitting surface of the display panel; wherein the sidewall of the first optical adjustment structure is a concave arc surface, and the first optical adjustment structure at least adjusts the emission direction of the light emitted by the light-emitting functional layer.

[0006] According to one aspect of this application, the pixel defining portion has a first radius of curvature. The distance between the geometric centers of the two first surfaces of two adjacent pixel openings is the pixel pitch. The first radius of curvature Less than .

[0007] According to one aspect of this application, the display panel further includes a second optical adjustment structure disposed on the side of the light-emitting device layer away from the substrate. In the direction away from the substrate, the second optical adjustment structure includes a columnar lens layer and a first material layer stacked sequentially. The columnar lens layer includes a plurality of protrusions, and the first material layer covers the columnar lens layer. The refractive index of the columnar lens layer is greater than that of the first material layer. The columnar lens layer includes a plurality of columnar lenses, one of which corresponds to at least two columns of pixel openings. The orthographic projection of the columnar lens onto the substrate covers the orthographic projection of the corresponding at least two columns of pixel openings onto the substrate.

[0008] According to one aspect of this application, the display panel further includes an encapsulation layer disposed between the light-emitting device layer and the second optical adjustment structure; in a direction perpendicular to the substrate, a first distance is defined between the side of the columnar lens layer near the substrate and the edge of the first optical adjustment structure near the substrate. The first distance Satisfy the following formula: ;in: The refractive index of the encapsulation layer; The refractive index of the columnar lens layer; The refractive index of the first material layer; The second radius of curvature corresponds to the radius of curvature of the first optical adjustment structure; The third radius of curvature corresponds to the radius of curvature of the cylindrical lens; The second distance, , The third distance corresponds to the height of the pixel opening in the direction perpendicular to the substrate. The fourth distance corresponds to the maximum height of the cylindrical lens layer.

[0009] According to one aspect of this application, .

[0010] According to one aspect of this application, the first optical adjustment structure includes a reflective layer and an insulating layer stacked sequentially along a direction away from the substrate, the insulating layer covering the reflective layer, and in a direction perpendicular to the substrate, the orthographic projection of the reflective layer lies within the orthographic projection range of the insulating layer.

[0011] According to one aspect of this application, the reflectivity of the reflective layer is greater than or equal to 80%.

[0012] According to one aspect of this application, the material of the insulating layer is the same as the material of the pixel defining layer.

[0013] According to one aspect of this application, the encapsulation layer includes: a first inorganic encapsulation layer located on the side of the light-emitting functional layer away from the substrate; an organic encapsulation layer located on the side of the first inorganic encapsulation layer away from the substrate; and a second inorganic encapsulation layer located on the side of the organic encapsulation layer away from the substrate; wherein the first optical adjustment structure is spaced between the first inorganic encapsulation layer and the organic encapsulation layer.

[0014] According to one aspect of this application, the second optical adjustment structure further includes a spacer layer disposed between the light-emitting device layer and the cylindrical lens layer.

[0015] According to one aspect of this application, the refractive index of the spacer layer is the same as the refractive index of the encapsulation layer.

[0016] According to one aspect of this application, the thickness of the first optical adjustment structure ranges from 0.5 µm to 1.0 µm.

[0017] Based on the above-described display panel technical solution, a second aspect of the present invention provides a display device, the display device comprising a display panel of any possible implementation of the first aspect.

[0018] Compared with existing technologies, the display panel provided in this embodiment of the invention includes: a substrate, a pixel definition layer, a light-emitting device layer, and a first optical adjustment structure. The first optical adjustment structure has concave arc-shaped sidewalls and is located within the pixel openings of the pixel definition layer, and is spaced apart on the side of the pixel-limiting portion of the pixel definition layer facing the light-emitting surface of the display panel. The first optical adjustment structure at least adjusts the emission direction of the light emitted from the light-emitting functional layer. By providing a first optical adjustment structure with concave arc-shaped sidewalls, this embodiment of the invention achieves the reflection and recovery of large-angle light emitted from the light-emitting functional layer, converting it into small-angle light, thereby improving light utilization efficiency, increasing display brightness, and improving the viewing angle characteristics of the display panel. Simultaneously, the configuration of the first optical adjustment structure provides a good optical path foundation for subsequent naked-eye 3D display. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a partial structural diagram of a pixel opening in a display panel provided in an embodiment of this application.

[0021] Figure 2 This is one of the structural schematic diagrams of a display panel provided in an embodiment of the present invention.

[0022] Figure 3 This is a second schematic diagram of the structure of a display panel provided in an embodiment of the present invention.

[0023] Figure 4 This is the third schematic diagram of a display panel provided in an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the optical path of a display panel provided in an embodiment of the present invention.

[0025] Figure 6 This is the fourth schematic diagram of a display panel provided in an embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram showing a partial structure and key dimensions of a display panel provided in an embodiment of the present invention.

[0027] Figure 8 This is a schematic diagram of the orthographic projection of a cylindrical lens and a sub-pixel unit in a display panel on a substrate, provided as an embodiment of the present invention.

[0028] Figure 9 This is a top view of a display device provided in an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached drawings: 01, display panel; 02, display device; 03, display chip; 10, substrate; 11, pixel defining layer; 111, pixel defining portion; 112, pixel opening; 1121, first surface; 1122, second surface; 12, light-emitting device; 121, first electrode layer; 122, light-emitting functional layer; 123, second electrode layer; 14, first optical adjustment structure; 141, reflective layer; 142, insulating layer; 15, second optical adjustment structure; 151, lenticular lens layer; 1511, lenticular lens; 152, first material layer; 153, spacer layer; 16, encapsulation layer; 161, first inorganic encapsulation layer; 162, organic encapsulation layer; 163, second inorganic encapsulation layer; 17, sub-pixel unit; 18, viewpoint; Pixel spacing; v, First distance; First radius of curvature; Second radius of curvature; Third radius of curvature; Second distance; The third distance; The fourth distance. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] It should be noted that, where there is no conflict, different features in the embodiments of this application can be combined with each other.

[0035] Please see Figure 1 , Figure 2This embodiment provides a display panel 01. The display panel 01 includes a substrate 10, a pixel definition layer 11 disposed on one side of the substrate 10, a light-emitting device layer 12, and a first optical adjustment structure 14. The pixel definition layer 11 includes a pixel defining portion 111 and a plurality of pixel openings 112 formed by the pixel defining portion 111, and the plurality of pixel openings 112 are arranged in an array. The light-emitting device layer 12 is at least disposed within the pixel openings 112. Along the direction away from the substrate 10, the light-emitting device layer 12 includes a first electrode layer 121, a light-emitting functional layer 122, and a second electrode layer 123 stacked sequentially. The first optical adjustment structure 14 is at least partially located within the pixel openings 112 and is disposed on the side of the sidewall of the pixel defining portion 111 facing the light-emitting surface of the display panel 01. The sidewall of the first optical adjustment structure 14 is a concave arc surface, and the first optical adjustment structure 14 at least adjusts the emission direction of the light emitted by the light-emitting functional layer 122.

[0036] Specifically, such as Figure 2 As shown, the substrate 10 can be a rigid substrate or a flexible substrate. Rigid substrates may include, for example, glass substrates, polymethyl methacrylate (PMMA) substrates, silicon substrates, etc. Flexible substrates may include, for example, polyethylene terephthalate (PET) substrates, polyethylene naphthalate (PEN) substrates, or polyimide (PI) substrates, etc. In some embodiments of this application, the substrate 10 may include a substrate, a driving circuit layer, and a planarization layer (not shown) stacked sequentially, wherein the driving circuit layer is used to drive the light-emitting device layer 12 to emit light, and the planarization layer is used to provide a flat surface. A pixel defining layer 11 is disposed on one side of the substrate 10, and its pixel defining portion 111 encloses a plurality of pixel openings 112, which are arranged in an array to accommodate the light-emitting device layer 12. In this embodiment, the sidewalls of the pixel defining portion 111 are constructed as concave arc surfaces, that is, the sidewalls are concave in a direction away from the center of the pixel opening 112, forming a curved shape similar to a concave mirror. The light-emitting device layer 12 is at least partially disposed within the pixel opening 112, and includes a first electrode layer 121, a light-emitting functional layer 122, and a second electrode layer 123 stacked sequentially. The first electrode layer 121 can serve as an anode, and the second electrode layer 123 can serve as a cathode. The light-emitting functional layer 122 can include one or more of a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer; this embodiment does not specifically limit this.

[0037] The first optical adjustment structure 14 is at least partially located within the pixel opening 112 and is disposed on the side of the pixel limiting portion 111 facing the light-emitting surface of the display panel 01. That is, the first optical adjustment structure 14 is attached to the concave arc-shaped sidewall of the pixel limiting portion 111 and extends along the contour of that sidewall. Since the sidewall of the pixel limiting portion 111 is concave arc-shaped, the first optical adjustment structure 14 disposed thereon also has a concave arc-shaped shape. The first optical adjustment structure 14 can at least adjust the emission direction of the light emitted by the light-emitting functional layer 122. Specifically, when the light-emitting functional layer 122 emits light, large-angle light rays propagating laterally will illuminate the first optical adjustment structure 14. Because the first optical adjustment structure 14 has a concave arc-shaped shape, it can reflect these large-angle light rays into small-angle light rays, that is, emit them in a direction close to perpendicular to the substrate 10. In this way, large-angle light rays that might otherwise be unable to be emitted due to total internal reflection are effectively utilized, improving the light source utilization rate and increasing the display brightness. Meanwhile, light rays at small angles produce less aberration when passing through other optical layers, which helps improve image quality.

[0038] It should be noted that in other embodiments of this application, the sidewall of the pixel limiting portion 111 may not be limited to the above-described concave arc surface structure, and may also be set as a plane. By providing another film layer with a concave arc surface between the pixel limiting portion 111 and the first optical adjustment structure 14, this film layer can serve as an intermediate layer to provide a positional basis for the concave arc surface sidewall of the first optical adjustment structure 14. Specifically, an intermediate film layer with a concave arc surface shape can be formed on the pixel limiting portion 111 with a planar sidewall first, and then the first optical adjustment structure 14 can be set on the concave arc surface of the intermediate film layer, so that the first optical adjustment structure 14 also has a concave arc surface shape, thereby realizing the reflection and modulation effect of large-angle light emitted by the light-emitting functional layer 122. The display panel 01 provided in this embodiment, by providing a pixel limiting portion 111 with a concave arc surface sidewall and providing a first optical adjustment structure 14 on the sidewall, realizes the reflection and recovery of large-angle light emitted by the light-emitting functional layer 122, converting it into small-angle light, thereby improving the light utilization efficiency, increasing the display brightness, and improving the viewing angle characteristics of the display panel 01. Meanwhile, the configuration of the first optical adjustment structure 14 provides a good optical path foundation for the subsequent realization of naked-eye 3D display.

[0039] Please see Figures 1 to 3 In this embodiment, the pixel limiting portion 111 has a first radius of curvature. The distance between the geometric centers of the two first surfaces 1121 (i.e., the areas in the pixel openings 112 that expose the first electrode layer) of two adjacent pixel openings 112 is the pixel pitch. First radius of curvature Less than Meanwhile, the display panel 01 also includes a second optical adjustment structure 15, which is disposed on the side of the light-emitting device layer 12 away from the substrate 10. In the direction away from the substrate 10, the second optical adjustment structure 15 includes a columnar lens layer 151 and a first material layer 152 stacked sequentially. The columnar lens layer 151 includes multiple protrusions, and the first material layer 152 covers the columnar lens layer 151. The refractive index of the columnar lens layer 151 is greater than the refractive index of the first material layer 152. The columnar lens layer 151 includes multiple columnar lenses 1511, each columnar lens 1511 corresponding to at least two columns of pixel openings 112, and the orthographic projection of the columnar lens 1511 onto the substrate 10 covers the orthographic projection of the corresponding at least two columns of pixel openings 112 onto the substrate 10.

[0040] Specifically, such as Figure 3 and Figure 5 As shown, the second optical adjustment structure 15 is disposed on the side of the light-emitting device layer 12 away from the substrate 10. In this embodiment, the display panel 01 further includes an encapsulation layer 16, which is disposed between the light-emitting device layer 12 and the second optical adjustment structure 15 to protect the light-emitting device layer 12 from water and oxygen corrosion. The encapsulation layer 16 may include a first inorganic encapsulation layer 161, an organic encapsulation layer 162, and a second inorganic encapsulation layer 163 stacked sequentially. The second optical adjustment structure 15 is disposed on the side of the encapsulation layer 16 away from the substrate 10. The second optical adjustment structure 15 includes a columnar lens layer 151 and a first material layer 152. The columnar lens layer 151 is first formed on the encapsulation layer 16 and includes a plurality of columnar lenses 1511, each columnar lens 1511 having a convex curved surface structure. The first material layer 152 is disposed on the side of the columnar lens layer 151 away from the substrate 10 and covers the columnar lens layer 151. Because the refractive index of the lenticular lens layer 151 is greater than that of the first material layer 152, when light propagates from the lenticular lens layer 151 to the first material layer 152, refraction occurs at the interface, thereby changing the direction of light propagation. The curved shape of the lenticular lens 1511 allows each lenticular lens 1511 to converge or diverge light. One lenticular lens 1511 corresponds to at least two columns of pixel openings 112, and the orthographic projection of the lenticular lens 1511 onto the substrate 10 overlaps the orthographic projection of the corresponding at least two columns of pixel openings 112 onto the substrate 10. This ensures that light emitted from the light-emitting device layer 12 within different pixel openings 112 is refracted in different spatial directions after passing through the corresponding lenticular lens 1511, entering the viewer's left and right eyes respectively, thus achieving a naked-eye 3D display effect.

[0041] In this embodiment, by setting the first radius of curvature The pixel spacing is smaller than the distance between the geometric centers of the two first surfaces 1121 of two adjacent pixel openings 112. Half of the radius of curvature ensures that the sidewall of the pixel limiting portion 111 has a sufficiently steep concave arc shape, thereby enabling the first optical adjustment structure 14 disposed thereon to more effectively reflect large-angle light emitted from the light-emitting functional layer 122. When the first radius of curvature... At this time, the sidewall curvature of the pixel limiting portion 111 is relatively large, which helps to converge light into a smaller angle range, thereby improving the light emission efficiency. Furthermore, another important benefit of this limiting condition is that it effectively prevents light overlap between adjacent pixel openings 112. Specifically, when the first radius of curvature... At this time, the sidewall curvature of the pixel limiting part 111 may be too gentle or even extend into the area of ​​the adjacent pixel opening 112, causing light emitted from one pixel opening 112 to enter the light emission range of the adjacent pixel opening 112, resulting in optical crosstalk and reducing display contrast and color purity. By setting the first radius of curvature... This ensures that each pixel opening 112 has an independent and clearly defined optical effective range, and avoids optical interference between adjacent pixels from a structural design perspective.

[0042] It should be noted that in some embodiments of this application, the concave arc surface of the sidewall of the pixel limiting portion 111 is not necessarily a smooth concave arc surface with a single curvature, but can also be configured as a composite concave arc surface with multiple different radii of curvature, that is, the sidewall contour is composed of multiple arc segments with different curvatures spliced ​​together. In such embodiments, the first radius of curvature of the pixel limiting portion 111 is... This can correspond to multiple different values. However, regardless of how many arc segments with different curvatures the concave surface is composed of, in order to ensure that the reflective layer corresponding to each arc segment can effectively gather large-angle light rays and prevent light overlap between adjacent pixel openings 112, the radius of curvature of each arc segment should be smaller than the pixel spacing between the geometric centers of the two first surfaces 1121 of two adjacent pixel openings 112. Half of, that is, each first radius of curvature All meet Each local arc segment still has a sufficiently steep curvature, which can effectively reflect the large-angle light emitted by the light-emitting functional layer 122 into small-angle light, improving the utilization rate of the light source, and can also avoid optical crosstalk between adjacent pixels from the structural design, ensuring the clarity and color accuracy of the displayed image.

[0043] The display panel 01 provided in this embodiment achieves end-to-end optical path optimization from the light source to the light-emitting side by combining the first optical adjustment structure 14 and the second optical adjustment structure 15. The first optical adjustment structure 14 is responsible for reflecting the large-angle light emitted by the light-emitting functional layer 122 into small-angle light, improving the utilization rate of the light source; the lenticular lens 1511 in the second optical adjustment structure 15 is responsible for projecting the light emitted from different pixel openings 112 to different viewpoint directions, realizing naked-eye 3D display. The two optical adjustment structures work together to ensure both display brightness and achieve a high-quality 3D display effect. At the same time, by setting the refractive index of the lenticular lens layer 151 to be greater than that of the first material layer 152, and forming a groove structure in the first material layer 152, the lenticular lens 1511 can be embedded in the first material layer 152. This structure helps to reduce the thickness of the device and simplify the manufacturing process.

[0044] like Figure 4 As shown, in some other embodiments of this application, the first optical adjustment structure 14 includes a reflective layer 141 and an insulating layer 142 sequentially stacked along a direction away from the substrate 10. The insulating layer 142 covers the reflective layer 141, and in a direction perpendicular to the substrate 10, the orthographic projection of the reflective layer 141 lies within the orthographic projection range of the insulating layer 142. Optionally, the reflectivity of the reflective layer is greater than or equal to 80%. Optionally, the material of the insulating layer is the same as the material of the pixel defining portion 111.

[0045] Specifically, the first optical adjustment structure 14 includes a reflective layer 141 and an insulating layer 142. The reflective layer 141 is directly disposed on the concave arc sidewall of the pixel defining portion 111. Its material can be a metallic material, such as aluminum, silver, or copper, which have high reflectivity, or a dielectric reflection structure such as a distributed Bragg mirror (DBR). The reflectivity of the reflective layer 141 is greater than or equal to 80%, preferably greater than or equal to 90%, to ensure that most light is effectively reflected and to reduce light loss. The insulating layer 142 is disposed on the side of the reflective layer 141 away from the substrate 10, i.e., covering the surface of the reflective layer 141. Its function is to isolate the reflective layer 141 from subsequent film layers, preventing electrical short circuits or mutual interference. The material of the insulating layer 142 is the same as that of the pixel defining portion 111, for example, the same organic photoresist material. This simplifies the material system, ensures good adhesion between the insulating layer 142 and the pixel defining portion 111, and also facilitates the integration of the fabrication process.

[0046] In this embodiment, the display panel 01 provided herein constitutes a first optical adjustment structure 14 by setting a reflective layer 141 and an insulating layer 142, which ensures high reflectivity while achieving electrical isolation, thereby improving the reliability and stability of the device. The reflective layer 141 uses a highly reflective material to further reduce light loss and improve display brightness. The insulating layer 142 uses the same material as the pixel defining part 111, ensuring good bonding between the film layers and simplifying the process.

[0047] like Figure 6 As shown, in some other embodiments of this application, the display panel 01 further includes an encapsulation layer 16. The encapsulation layer 16 includes a first inorganic encapsulation layer 161 located on the side of the light-emitting functional layer 122 away from the substrate 10, an organic encapsulation layer 162 located on the side of the first inorganic encapsulation layer 161 away from the substrate 10, and a second inorganic encapsulation layer 163 located on the side of the organic encapsulation layer 162 away from the substrate 10. A first optical adjustment structure 14 is spaced between the first inorganic encapsulation layer 161 and the organic encapsulation layer 162.

[0048] In this embodiment, the encapsulation layer 16 includes a three-layer structure: a first inorganic encapsulation layer 161, an organic encapsulation layer 162, and a second inorganic encapsulation layer 163. The first inorganic encapsulation layer 161 and the second inorganic encapsulation layer 163 can be formed using inorganic materials such as silicon nitride, silicon oxide, and silicon oxynitride through a chemical vapor deposition (CVD) process. The organic encapsulation layer 162 can be formed using organic materials such as acrylic resin, epoxy resin, and polyimide through an inkjet printing (IJP) or coating process. This inorganic / organic / inorganic stacked structure can effectively block water and oxygen, protecting the light-emitting device layer 12 from the influence of the external environment and extending the lifespan of the display panel 01. A first optical adjustment structure 14 is spaced between the first inorganic encapsulation layer 161 and the organic encapsulation layer 162. Specifically, after forming the first inorganic encapsulation layer 161, a reflective layer 141 and an insulating layer 142 are formed at the position of the sidewall corresponding to the pixel defining portion 111 using photolithography and etching processes, and then the organic encapsulation layer 162 is coated. In this way, the first optical adjustment structure 14 is encapsulated between the first inorganic encapsulation layer 161 and the organic encapsulation layer 162, which not only provides effective protection for the encapsulation layer 16, but also avoids damage to the light-emitting device layer 12 caused by its fabrication process.

[0049] Please see Figure 5 and Figure 7 In this embodiment, the display panel 01 further includes an encapsulation layer 16, which is disposed between the light-emitting device layer 12 and the second optical adjustment structure 15. In a direction perpendicular to the substrate 10, the first distance between the side of the columnar lens layer 151 near the substrate 10 and the edge of the first optical adjustment structure 14 near the substrate 10 is... The first distance Satisfy the following formula: ;in: The refractive index of encapsulation layer 16; The refractive index of the cylindrical lens layer 151; The refractive index of the first material layer 152; The second radius of curvature corresponds to the radius of curvature of the first optical adjustment structure 14; This is the third radius of curvature, which corresponds to the radius of curvature of the cylindrical lens 1511; The second distance, , The third distance corresponds to the height of the pixel opening 112 in the direction perpendicular to the substrate 10; This is the fourth distance, corresponding to the maximum height of the cylindrical lens layer 151.

[0050] It should be noted that in the above formula... The equivalent refractive index is given by the encapsulation layer 16. In this embodiment, the encapsulation layer 16 comprises a first inorganic encapsulation layer 161, an organic encapsulation layer 162, and a second inorganic encapsulation layer 163, which are stacked sequentially. These three layers have different refractive indices. In actual optical calculations, when light passes through the encapsulation layer 16 perpendicularly or approximately perpendicularly, the multilayer structure can be equivalent to an optical medium with a single equivalent refractive index.

[0051] Specifically, this embodiment defines the optical path length from the first optical adjustment structure 14 to the lenticular lens 1511 using the above formula. The physical meaning of this formula is to ensure that the focal plane of the lenticular lens 1511 coincides exactly with or nearly coincides with the plane of the light-emitting functional layer 122, thereby allowing the light reflected by the first optical adjustment structure 14 to be accurately focused by the lenticular lens 1511 onto a preset viewpoint direction, achieving the best 3D display effect. The first term in the formula... The focal length characteristics of the first optical adjustment structure 14 are described, wherein the second radius of curvature is... The radius of curvature of the first optical adjustment structure 14, the second distance This is the distance from the light-emitting functional layer 122 to the vertex of the arc surface of the first optical adjustment structure 14. When the light-emitting functional layer 122 is located within the focal point of the first optical adjustment structure 14, the reflected light is divergent, and this formula calculates the equivalent virtual image position. The position of this virtual image is equivalent to the object point position of the subsequent optical system. Therefore, the first term actually calculates the position of the equivalent light-emitting point (virtual image) relative to the vertex of the arc surface of the first optical adjustment structure 14 after being adjusted by the first optical adjustment structure 14. The second term... This describes the optical path length of light propagating in the cylindrical lens layer 151, the fourth distance. For the maximum height of the cylindrical lens layer 151, the fourth distance... Converted to optical thickness. Third item. The focal length characteristics of the cylindrical lens 1511 are described, where the third radius of curvature is... Let be the radius of curvature of the cylindrical lens 1511. This represents the refractive index difference between the cylindrical lens 1511 and the first material layer 152. This is achieved by adjusting these three factors according to the refractive index of the encapsulation layer 16. By scaling the scale, the first distance v from the side of the cylindrical lens layer 151 near the substrate 10 to the edge of the first optical adjustment structure 14 near the substrate 10 can be obtained.

[0052] In this embodiment, the formula matches the virtual image position of the first optical adjustment structure 14 with the focal plane position of the cylindrical lens 1511, so that the light rays emitted from the first optical adjustment structure 14 (whose backward extension intersects the virtual image point) can be collimated or accurately converged to the viewer's eye position after passing through the cylindrical lens 1511, thereby achieving low crosstalk and high definition 3D display.

[0053] In a specific numerical example of this embodiment, the refractive index of the encapsulation layer 16 is... The refractive index of the lenticular lens layer 151 is set to 1.4. The value is 1.6, which is the refractive index of the first material layer 152. The value is 1.0, the second radius of curvature. The value is 8.0 µm, the third radius of curvature. The value is 73.25 µm, the second distance. The value is 5.0, the fourth distance. The value is taken as 70.0 µm. Substituting the above value into the formula, the first distance between the side of the cylindrical lens layer 151 near the substrate 10 and the edge of the first optical adjustment structure 14 near the substrate 10 is obtained. It is 137.67 µm.

[0054] In some other embodiments of this application, the second distance Satisfying the relation .in, Second radius of curvature The radius of curvature of the first optical adjustment structure 14, the third distance The height of pixel opening 112 in the direction perpendicular to substrate 10. This relationship ensures that the plane containing the light-emitting functional layer 122 is within one focal length of the first optical adjustment structure 14. Specifically, when the light-emitting functional layer 122 is within the focal point of the first optical adjustment structure 14, the large-angle light emitted by the light-emitting functional layer 122, after being reflected by the first optical adjustment structure 14, will be transformed into small-angle light with a smaller divergence angle, or even nearly parallel light. This is because the concave reflector has the characteristic of converging light: when the point light source is within the focal point, the reflected light is divergent, but its divergence angle is smaller than the divergence angle of the incident light; when the point light source is at the focal point, the reflected light is parallel; when the point light source is outside the focal point, the reflected light converges. In this embodiment, the large-angle light emitted by the light-emitting functional layer 122 originally caused severe aberrations when it passed through the cylindrical lens 1511 due to its excessively large incident angle, resulting in crosstalk between the left and right eye images. By setting... This positions the light-emitting functional layer 122 within the focal point of the reflective layer. The large-angle reflected light rays are then converged into small-angle rays. When these small-angle rays enter the lenticular lens 1511, the angle of incidence is significantly reduced, thereby drastically reducing aberrations at the interface of the lenticular lens 1511. This reduction in aberration means that light can be refracted more accurately to the preset viewpoint direction, reducing the phenomenon of light that should enter the left eye interfering with the right eye, lowering crosstalk between the left and right eye images, and improving the clarity of the 3D display image. Simultaneously, large-angle rays that were originally limited by total internal reflection are converted into small-angle rays, improving light source utilization and increasing display brightness. If the second distance... When the distance equals 0, meaning the light-emitting functional layer 122 is located at the apex of the arc surface of the first optical adjustment structure 14, the reflective layer is almost ineffective, and large-angle light rays cannot be effectively gathered; if the second distance... Greater than or equal to The light-emitting functional layer 122 is located at or outside the focal point of the reflective layer. The reflected light may converge or diverge at relatively large angles, failing to effectively reduce aberrations. Therefore, the second distance... Limited to 0 to The ratio between these parameters is crucial for ensuring good optical performance.

[0055] Furthermore, such as Figure 5 , Figure 6As shown, in other embodiments of this application, the second optical adjustment structure 15 further includes a spacer layer 153, which is disposed between the light-emitting device layer 12 and the cylindrical lens layer 151. Specifically, the spacer layer 153 is disposed between the encapsulation layer 16 and the cylindrical lens layer 151. The refractive index of the spacer layer 153 is the same as or similar to the refractive index of the encapsulation layer 16. By adjusting the thickness of the spacer layer 153, the first distance v between the side of the cylindrical lens layer 151 near the substrate 10 and the edge of the first optical adjustment structure 14 near the substrate 10 can be adjusted.

[0056] Specifically, the spacer layer 153 is an additional transparent film layer disposed between the encapsulation layer 16 and the lenticular lens layer 151. Its function is to provide a flat substrate during the fabrication of the lenticular lens 1511, and simultaneously control the isolation distance between the lenticular lens 1511 and the light-emitting functional layer 122. In this embodiment, the introduction of the spacer layer 153 provides additional design freedom for adjusting the first distance v. From the aforementioned formula... It can be seen that the magnitude of the first distance v depends on the parameters of the first optical adjustment structure 14. , ), parameters of the second optical adjustment structure 15 ( , , , ) and the refractive index of encapsulation layer 16 However, in actual fabrication, the parameters of the first optical adjustment structure 14 and the second optical adjustment structure 15 are often limited by process conditions and are difficult to adjust continuously. The introduction of the spacer layer 153 provides a convenient means of adjustment: by increasing or decreasing the thickness of the spacer layer 153, the vertical distance between the columnar lens layer 151 and the light-emitting functional layer 122 can be directly changed, thereby effectively adjusting the first distance v.

[0057] Please see Figure 5 In this embodiment, the light emitted by the light-emitting functional layer 122 includes small-angle light and large-angle light. The small-angle light propagates directly upwards, passing through the encapsulation layer 16, the spacer layer 153, the lenticular lens 1511, and the first material layer 152 before exiting. The large-angle light first propagates laterally, illuminating the first optical adjustment structure 14 on the sidewall of the pixel limiting portion 111. After being reflected by the reflective layer of the first optical adjustment structure 14, it is converted into small-angle light, which then propagates upwards through subsequent film layers before exiting. Through this design, large-angle light that would otherwise be unable to exit is effectively utilized, improving the light source utilization rate. At the same time, since the light entering the lenticular lens 1511 is all small-angle light, the aberrations generated at the interface of the lenticular lens 1511 are small, thereby reducing the impact of aberrations on the 3D display image, reducing crosstalk between the left and right eye images, and improving the clarity of the 3D display image.

[0058] In other embodiments of this application, the thickness of the first optical adjustment structure 14 ranges from 0.5 µm to 1.0 µm. For example, the thickness of the first optical adjustment structure 14 can be 0.5 µm, 0.6 µm, 0.7 µm, 0.8 µm, 0.9 µm, or 1.0 µm. This thickness range ensures that the reflective layer has sufficient reflectivity without increasing the overall thickness of the display panel 01 due to excessive thickness. It also facilitates control of the manufacturing process, avoiding problems such as stress cracking or decreased adhesion caused by excessive thickness.

[0059] like Figure 8 As shown, multiple sub-pixel units 17 are arranged in an array on the substrate 10. Each sub-pixel unit 17 corresponds to a pixel opening 112 and its internal light-emitting device layer 12. A cylindrical lens 1511 corresponds to multiple sub-pixel units 17. Figure 8 An exemplary illustration shows a cylindrical lens 1511 corresponding to four sub-pixel units 17, labeled 1, 2, 3, and 4, representing four different viewpoints 18. Light emitted from the sub-pixel units 17, after passing through the corresponding cylindrical lens 1511, is refracted in different spatial directions and enters the viewer's left and right eyes respectively, thus forming stereoscopic vision.

[0060] In this embodiment, the number of viewpoints 18 can be set according to product requirements. For example, it can be set to 2 viewpoints, 4 viewpoints, 5 viewpoints, 8 viewpoints, or 9 viewpoints, etc. Figure 7 An exemplary four-viewpoint system is shown, where one cylindrical lens 1511 corresponds to four sub-pixel units 17, each providing an image from one of four different perspectives. In a four-viewpoint system, the viewer can move their head within a certain range, seeing continuously changing perspective images and obtaining a more natural 3D viewing experience. The more viewpoints there are, the greater the range of head movement for the viewer and the freer the viewing experience, but the greater the loss of horizontal resolution. Therefore, the number of viewpoints can be selected according to the specific application scenario.

[0061] The display panel 01 provided in this embodiment reflects and recovers the large-angle light emitted from the light-emitting functional layer 122 through the first optical adjustment structure 14, converting it into small-angle light, which effectively improves the utilization rate of the light source and enhances the display brightness. At the same time, the small-angle light produces less aberration at the lenticular lens 1511, reducing crosstalk between the left and right eye images and improving the clarity of the 3D display image. By flexibly selecting the number of viewpoints, an optimal balance between resolution and viewing freedom can be achieved for different application scenarios and product requirements. Figure 8 The 4-viewpoint design shown ensures good viewing freedom while avoiding excessive resolution loss.

[0062] Based on the same inventive concept, the present invention also provides a display device 02. For example... Figure 9 As shown, the display device 02 includes the display panel 01 provided in any of the above embodiments. The display device 02 may further include a display chip 03, which is electrically connected to the display panel 01 and is used to provide display data and drive signals to the display panel 01. Figure 5 As shown, the display device 02 can be any product or component with display function, such as a mobile phone, tablet computer, laptop computer, television, monitor, digital photo frame, navigator, in-vehicle central control screen, smartwatch, virtual reality device, augmented reality device, etc.

[0063] In this embodiment, the display device 02 may further include a touch layer, which may be disposed on the side of the encapsulation layer 16 away from the substrate 10, for implementing touch functionality. The touch layer may adopt different structures such as external, embedded, or on-cell, and this embodiment does not limit this. The display device 02 may further include a polarizing layer, which may be disposed on the side of the touch layer away from the substrate 10, for reducing ambient light reflection and improving display contrast. The polarizing layer may include a pressure-sensitive adhesive layer, an optical compensation layer, a polyvinyl alcohol layer, and a cellulose triacetate protective layer stacked sequentially. The display device 02 may further include a cover plate, which is disposed on the outermost side of the display panel 01, for protecting the display panel 01 from external scratches and impacts. The cover plate may be made of transparent materials such as glass, polymethyl methacrylate (PMMA), or polycarbonate (PC).

[0064] Furthermore, the display device 02 may also include an eye-tracking module (not shown in the figure). The eye-tracking module may include a camera and an image processing unit for capturing the viewer's eye position in real time and adjusting the display content of the display panel 01 according to the eye position. Specifically, when eye movement of the viewer is detected, the eye-tracking module can send position information to the display chip 03. The display chip 03 adjusts the brightness and timing of each sub-pixel unit 17 according to this position information, ensuring that the viewer's left and right eyes always receive the correct view, thus maintaining a clear 3D effect even when the head moves. The introduction of the eye-tracking module can significantly improve viewing comfort and reduce visual fatigue.

[0065] The display device 02 provided in this embodiment, since it adopts the display panel 01 provided in any of the above embodiments, has excellent display performance such as high brightness, low crosstalk, wide viewing angle, and high definition, and can achieve a high-quality naked-eye 3D display effect.

[0066] In summary, the display panel and display device provided in this application, by setting a pixel definition layer with a concave arc sidewall and setting a first optical adjustment structure on the sidewall, realizes the reflection and recovery of large-angle light emitted by the light-emitting functional layer, converting it into small-angle light, thereby improving the light source utilization and display brightness; by setting a lenticular lens layer of the second optical adjustment structure, the light emitted by different sub-pixel units is projected to different viewpoint directions, realizing naked-eye 3D display; by optimizing key design parameters such as the radius of curvature of the first optical adjustment structure and the lenticular lens parameters, aberrations are reduced, crosstalk is reduced, and the clarity of the 3D display image is improved.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A display panel, characterized by, include: Substrate; A pixel definition layer is disposed on one side of the substrate. The pixel definition layer includes a pixel defining portion and a plurality of pixel openings formed by the pixel defining portion. The plurality of pixel openings are arranged in an array. The pixel openings have a first surface close to the substrate and a second surface away from the substrate. A light-emitting device layer is at least partially disposed within the pixel opening. Along the direction away from the substrate, the light-emitting device layer includes a first electrode layer, a light-emitting functional layer, and a second electrode layer that are stacked sequentially. The first optical adjustment structure is at least partially located within the pixel opening and is disposed on the side of the sidewall of the pixel limiting portion facing the light-emitting surface of the display panel; The sidewall of the first optical adjustment structure is a concave arc surface, and the first optical adjustment structure adjusts at least the emission direction of the light emitted by the light-emitting functional layer.

2. The display panel according to claim 1, characterized in that, The pixel defining part has a first radius of curvature The distance between the geometric centers of the two first surfaces of two adjacent pixel openings is a pixel pitch The first radius of curvature is smaller than .

3. The display panel of claim 1, wherein, It also includes a second optical adjustment structure disposed on the side of the light-emitting device layer away from the substrate; in the direction away from the substrate, the second optical adjustment structure includes a columnar lens layer and a first material layer stacked sequentially, the columnar lens layer including a plurality of protrusions, the first material layer covering the columnar lens layer, and the refractive index of the columnar lens layer being greater than the refractive index of the first material layer; The cylindrical lens layer includes a plurality of cylindrical lenses, one of the cylindrical lenses corresponding to at least two columns of the pixel openings, and the orthographic projection of the cylindrical lens on the substrate covers the orthographic projection of the corresponding at least two columns of the pixel openings on the substrate.

4. The display panel according to claim 3, characterized in that, It also includes an encapsulation layer disposed between the light-emitting device layer and the second optical adjustment structure; in a direction perpendicular to the substrate, the first distance between the side of the columnar lens layer near the substrate and the edge of the first optical adjustment structure near the substrate is... The first distance Satisfy the following formula: ;in: The refractive index of the encapsulation layer; The refractive index of the columnar lens layer; The refractive index of the first material layer; The second radius of curvature corresponds to the radius of curvature of the first optical adjustment structure; The third radius of curvature corresponds to the radius of curvature of the cylindrical lens; The second distance, , The third distance corresponds to the height of the pixel opening in the direction perpendicular to the substrate. The fourth distance corresponds to the maximum height of the cylindrical lens layer.

5. The display panel according to claim 4, characterized in that, 。 6. The display panel according to claim 1, characterized in that, The first optical adjustment structure includes a reflective layer and an insulating layer stacked sequentially along a direction away from the substrate, the insulating layer covering the reflective layer, and in a direction perpendicular to the substrate, the orthographic projection of the reflective layer is located within the orthographic projection range of the insulating layer; Preferably, the reflectivity of the reflective layer is greater than or equal to 80%; Preferably, the insulating layer is made of the same material as the pixel defining layer.

7. The display panel according to claim 4, characterized in that, The encapsulation layer includes: a first inorganic encapsulation layer located on the side of the light-emitting functional layer away from the substrate; an organic encapsulation layer located on the side of the first inorganic encapsulation layer away from the substrate; and a second inorganic encapsulation layer located on the side of the organic encapsulation layer away from the substrate. The first optical adjustment structure is spaced between the first inorganic encapsulation layer and the organic encapsulation layer.

8. The display panel according to claim 3, characterized in that, The second optical adjustment structure further includes a spacer layer disposed between the light-emitting device layer and the cylindrical lens layer; Preferably, the refractive index of the spacer layer is the same as that of the encapsulation layer.

9. The display panel according to claim 1, characterized in that, The thickness of the first optical adjustment structure ranges from 0.5 µm to 1.0 µm.

10. A display device, characterized in that, include: The display panel according to any one of claims 1-9.

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