Display panel, preparation method thereof and display device

Abstract

Embodiments of the present application provide a display panel, a preparation method thereof and a display device. The display panel comprises a substrate, a light emitting device layer, a light enhancement layer and an optical path adjusting layer. The light emitting device layer is located on one side of the substrate and comprises a plurality of light emitting units. The light enhancement layer is located on a side of the light emitting device layer away from the substrate. The optical path adjusting layer is located on a side of the light enhancement layer away from the substrate and comprises a light adjusting layer and a micro-mirror layer. Light emitted by the light emitting units is transmitted through the light adjusting layer and the micro-mirror layer in sequence, or the light emitted by the light emitting units is transmitted through the micro-mirror layer and the light adjusting layer in sequence. Embodiments of the present application set the light enhancement layer on a side of the light emitting device layer away from the substrate, thereby increasing the light emission rate of the display panel. The optical path adjusting layer is set on a side of the light enhancement layer away from the substrate, thereby balancing the brightness balance of the display panel at the normal viewing angle and the side viewing angle. On the basis of improving the light emission efficiency of the light emitting units, the problem of large brightness attenuation and color deviation at the side viewing angle is reduced.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a display panel, a method for manufacturing the same, and a display device. Background Technology

[0002] OLED (Organic Light Emitting Diode) devices are widely used in display panels due to their fast response time, wide viewing angle, light weight, and thinness. However, the internal electrodes of OLED display panels reflect incident light, resulting in a significant reduction in contrast. To ensure display quality, the display panel requires high brightness, which in turn leads to a decrease in display panel efficiency.

[0003] Currently, in the display panel industry, a technique using polarizers and quarter-wave plates is generally employed to filter incident light and outgoing light reflected by electrodes. While polarizers and quarter-wave plates can mitigate the decline in display panel contrast to some extent, they also block some outgoing light, reducing the light extraction efficiency of the light-emitting devices.

[0004] To increase the light extraction efficiency of light-emitting devices, a brightness enhancement layer is usually added below the polarizer and quarter-wave plate. However, the addition of the brightness enhancement layer will cause problems such as large brightness attenuation and severe color shift when viewing the side of the display panel. Summary of the Invention

[0005] This application addresses the shortcomings of existing methods by proposing a display panel, its manufacturing method, and a display device to solve the technical problems of low light extraction efficiency, large brightness attenuation at side viewing angles, and severe color deviation in the prior art.

[0006] To address the aforementioned problems, the embodiments of this application mainly provide the following technical solutions:

[0007] In a first aspect, embodiments of this application provide a display panel, comprising: a substrate, a light-emitting device layer, a brightness enhancement layer, and a light-adjusting path layer; the light-emitting device layer is located on one side of the substrate and includes a plurality of light-emitting units; the brightness enhancement layer is located on the side of the light-emitting device layer away from the substrate and is used to increase the light emission efficiency of the light-emitting device layer; the light-adjusting path layer is located on the side of the brightness enhancement layer away from the substrate and includes a dimming layer and a micromirror layer, wherein light emitted by the light-emitting units is transmitted sequentially through the dimming layer and the micromirror layer, or light emitted by the light-emitting units is transmitted sequentially through the micromirror layer and the dimming layer;

[0008] Wherein: if the light emitted by the light-emitting unit passes through the dimming layer and the micromirror layer in sequence, the refractive index of the dimming layer is less than the refractive index of the micromirror layer; if the light emitted by the light-emitting unit passes through the micromirror layer and the dimming layer in sequence, the refractive index of the dimming layer is greater than the refractive index of the micromirror layer.

[0009] Optionally, the relative refractive index of the micromirror layer and the dimming layer is 1.35-1.45.

[0010] Optionally, the dimming layer is located on the side of the light-emitting device layer away from the substrate and includes multiple dimming structures; the micromirror layer is located on the side of the dimming layer away from the substrate and includes multiple microprism structures; the microprism structure includes multiple polyhedral prism structures; the orthographic projection of the microprism structure on the substrate coincides with the orthographic projection of the dimming structure on the substrate; the light emitted by the light-emitting unit is transmitted sequentially through the dimming layer and the micromirror layer.

[0011] Optionally, the micromirror layer is located on the side of the light-emitting device layer away from the substrate, and includes multiple microprism structures, including polyhedral prism structures; the dimming layer is located on the side of the micromirror layer away from the substrate, and includes multiple dimming structures; the orthographic projection of the microprism structure on the substrate coincides with the orthographic projection of the dimming structure on the substrate, and the distance from the plane of the dimming layer to the substrate is equal to the distance from the plane of the vertex of the microprism structure to the substrate; the light emitted by the light-emitting unit is transmitted sequentially through the micromirror layer and the dimming layer.

[0012] Optionally, the micromirror layer is located on the side of the light-emitting device layer away from the substrate, and includes multiple microlens structures, each corresponding to a light-emitting unit; the dimming layer is located on the side of the micromirror layer away from the substrate, the orthographic projection of the dimming layer on the substrate covers the orthographic projection of the microlens structure on the substrate, and the distance from the plane of the dimming layer to the substrate is greater than the distance from the plane of the top of the microlens structure to the substrate.

[0013] Optionally, the microlens structure includes a first microlens and a second microlens, wherein the radius of curvature of the first microlens is different from that of the second microlens; wherein the wavelength of the light emitted by the light-emitting unit corresponding to the first microlens is different from the wavelength of the light emitted by the light-emitting unit corresponding to the second microlens.

[0014] Optionally, the first microlens corresponds to a red light-emitting unit, and the second microlens corresponds to a blue light-emitting unit, wherein the radius of curvature of the first microlens is greater than the radius of curvature of the second microlens.

[0015] Optionally, the display panel further includes: a polarizer and a quarter-wave plate, the quarter-wave plate being located on the side of the adjusting light path layer away from the substrate; the polarizer being located on the side of the quarter-wave plate away from the substrate; and an encapsulation layer being located between the light-emitting device layer and the brightness enhancement layer.

[0016] Secondly, embodiments of this application provide a display device, including: a display panel as described in the first aspect.

[0017] Thirdly, embodiments of this application provide a method for fabricating a display panel, comprising: providing a substrate; forming a light-emitting device layer on one side of the substrate, the light-emitting device layer including a plurality of light-emitting units; forming a brightness enhancement layer on the side of the light-emitting device layer away from the substrate; and forming an adjustment light path layer on the side of the brightness enhancement layer away from the substrate, wherein the adjustment light path layer includes a dimming layer and a micromirror layer.

[0018] The beneficial technical effects of the technical solutions provided in this application include:

[0019] The display panel provided in this application embodiment converts emitted light into circularly polarized light by setting a brightness enhancement layer on the side of the light-emitting device layer away from the substrate. Part of the circularly polarized light is transmitted and emitted, while part of the circularly polarized light is reflected and emitted through the light-emitting device layer. This not only alleviates the decrease in display contrast caused by incident light passing through the light-emitting device layer, but also increases the light extraction efficiency of the emitted light from the display panel. Furthermore, by setting an adjustment light path layer on the side of the brightness enhancement layer away from the substrate, and using a micromirror layer to refract the emitted light in a direction away from the central axis of the light-emitting unit, the brightness balance of the front and side viewing angles of the display panel is balanced. This not only improves the light extraction efficiency of the light-emitting unit, but also reduces the problems of large brightness attenuation and color shift at the side viewing angle.

[0020] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of the embodiments of this application are described below. Attached Figure Description

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of alternative embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0023] Figure 2 A partial structural diagram of a display panel provided in an embodiment of this application;

[0024] Figure 3 A partial top view of a display panel provided in an embodiment of this application;

[0025] Figure 4 This is a partial structural circuit diagram of a display panel provided in an embodiment of this application;

[0026] Figure 5 This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0027] Figure 6 A partial structural circuit diagram of another display panel provided in an embodiment of this application;

[0028] Figure 7 This is a schematic diagram of the structure of another display panel provided in an embodiment of this application;

[0029] Figure 8 A partial top view of the structure of another display panel provided in an embodiment of this application;

[0030] Figure 9a This is a graph showing the brightness decay trend of blue light-emitting units;

[0031] Figure 9b This is a graph showing the brightness decay trend of the red light-emitting unit.

[0032] Figure 10 A partial top view of another display panel provided in an embodiment of this application;

[0033] Figure 11a The brightness decay trend of white light before improvement;

[0034] Figure 11b The brightness decay trend of the improved white light;

[0035] Figure 12 This is a schematic flowchart of a display panel manufacturing method provided in an embodiment of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1-Substrate; 2-Light-emitting device layer; 3-Brightness enhancement layer; 4-Optical path adjustment layer; 5-1 / 4 wave plate; 6-Polarizer; 7-Encapsulation layer;

[0038] 21-Light-emitting unit;

[0039] 41-Dimming layer; 411-Dimming layer structure;

[0040] 42 - Micromirror layer; 421 - Microprism structure; 422 - Microlens structure;

[0041] 422a - First microlens; 422b - Second microlens. Detailed Implementation

[0042] This application is described in detail below. Examples of embodiments of this application are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. Furthermore, detailed descriptions of known technologies that are unnecessary for the features of this application are omitted. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0043] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0044] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this application means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connections or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0045] In view of the problems of low light extraction efficiency, large brightness attenuation at side viewing angle, and serious color deviation in the current related technologies, the present application provides a display panel to solve the above-mentioned technical problems in the current technology.

[0046] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0047] This application provides a display panel. Specifically, the display panel in this application is an organic electroluminescent display panel. The arrangement of the light-emitting device layer is similar to that in the prior art, and will not be described in detail here.

[0048] First, let me introduce some of the terms used in this application:

[0049] Orthogonal viewing angle refers to the line of sight being perpendicular to the plane where the display panel is located;

[0050] Side viewing angle refers to the angle formed between the line of sight and the vertical surface of the display panel;

[0051] Relative refractive index: The ratio of the sine of the incident angle to the sine of the refraction angle when light enters a second medium from a first medium is called the relative refractive index of the second medium to the first medium. It is used to indicate the degree of deviation of light when it is refracted between two media.

[0052] This application provides a display panel, such as... Figure 1 , Figure 5 and Figure 7 As shown, the display panel includes: a substrate 1, a light-emitting device layer 2, a brightness enhancement layer 3, and a light-adjusting path layer 4. The light-emitting device layer 2 is located on one side of the substrate 1 and includes multiple light-emitting units 21. The brightness enhancement layer 3 is located on the side of the light-emitting device layer 2 away from the substrate and is used to increase the light emission efficiency of the light-emitting device layer 2. The light-adjusting path layer 4 is located on the side of the brightness enhancement layer 3 away from the substrate 1 and includes a dimming layer 41 and a micromirror layer 42. The light emitted by the light-emitting unit 21 is transmitted sequentially through the dimming layer 41 and the micromirror layer 42, or the light emitted by the light-emitting unit 21 is transmitted sequentially through the micromirror layer 42 and the dimming layer 41. Wherein: if the light emitted by the light-emitting unit 21 is transmitted sequentially through the dimming layer 41 and the micromirror layer 42, the refractive index of the dimming layer 41 is less than the refractive index of the micromirror layer 42; if the light emitted by the light-emitting unit 21 is transmitted sequentially through the micromirror layer 42 and the dimming layer 41, the refractive index of the dimming layer 41 is greater than the refractive index of the micromirror layer 42.

[0053] It should be noted that the material of the brightness enhancement layer 3 can be a cholesteric liquid crystal material, which is used to convert the light emitted by the light-emitting unit 21 into circularly polarized light, transmit a portion of the circularly polarized light, and reflect a portion of the circularly polarized light back to the light-emitting device layer 2. The reflected circularly polarized light can be reflected again by the light-emitting device layer 2 and then transmitted through the brightness enhancement layer 3, thereby improving the light extraction efficiency of the display panel and reducing the power consumption of the display panel.

[0054] Since the setting of the brightness enhancement layer 3 may cause a significant decrease in the brightness of the display panel from the side viewing angle, this embodiment of the application sets an adjustment light path layer 4 on the side of the brightness enhancement layer 3 away from the substrate 1. The adjustment light path layer 4 can disperse the emitted light in the front viewing direction to a certain extent, reduce the brightness decrease of the display panel from the side viewing angle, thereby balancing the brightness of the display panel from the front and side viewing angles while increasing the light emission efficiency.

[0055] Specifically, the light path adjustment layer 4 provided in this application embodiment includes a dimming layer 41 and a micromirror layer 42. In one embodiment, the light emitted by the light-emitting unit 21 is transmitted sequentially through the dimming layer 41 and the micromirror layer 42. Since the refractive index of the dimming layer 41 is less than that of the micromirror layer 42, the light path adjustment layer 4 can refract the light emitted by the light-emitting unit 21 in a direction away from the central axis of the light-emitting unit (i.e., refract it towards the wide viewing angle direction of the display panel). This balances the brightness of the display panel at the front and side viewing angles, thereby improving the light emission efficiency of the light-emitting unit. Based on this, the problems of large brightness attenuation and color shift at side viewing angles are reduced. Furthermore, in another embodiment, the light emitted by the light-emitting unit 21 is transmitted sequentially through the micromirror layer 42 and the dimming layer 41, and the refractive index of the dimming layer 41 is greater than that of the micromirror layer 42. Therefore, the adjusting light path layer 4 can refract the light emitted by the light-emitting unit 21 in a direction away from the central axis of the light-emitting unit, thereby balancing the brightness of the display panel at the front and side viewing angles. While improving the light emission efficiency of the light-emitting unit, the problems of large brightness attenuation and color shift at side viewing angles are reduced.

[0056] In some specific embodiments, to better balance the brightness of the display panel from the front and side viewing angles, the relative refractive index of the micromirror layer 42 and the dimming layer 41 is 1.35-1.45. Specifically, if the refractive index of the dimming layer 41 is less than the refractive index of the micromirror layer 42, the refractive index of the micromirror layer 42 relative to the dimming layer 41 is 1.35-1.45; preferably, the refractive index of the dimming layer 41 is 1.25-1.30, and the refractive index of the micromirror layer 42 is 1.65-1.70. If the refractive index of the dimming layer 41 is greater than the refractive index of the micromirror layer 42, the refractive index of the dimming layer 41 relative to the micromirror layer 42 is 1.35-1.45; preferably, the refractive index of the dimming layer 41 is 1.95-2.00, and the refractive index of the micromirror layer 42 is 1.40-1.45. Optionally, the dimming layer 41 can be made of an organic insulating material.

[0057] In some specific embodiments, the display panel further includes a quarter-wave plate 5 and a polarizer 6, such as Figure 1As shown, the quarter-wave plate 5 is located on the side of the adjusting light path layer 4 away from the substrate 1, and is used to change the polarization state of the light, converting the circularly polarized light emitted from the brightness enhancement layer 3 into linearly polarized light; the polarizer 6 is located on the side of the quarter-wave plate 5 away from the substrate 1. The specific arrangement of the quarter-wave plate 5 and the polarizer 6 is similar to that of the prior art, and will not be described in detail here; in addition, the display panel also includes an encapsulation layer 7, which is located between the light-emitting device layer 2 and the brightness enhancement layer 3. The encapsulation layer 7 is used to protect the light-emitting device layer 2, and may include an inorganic thin film encapsulation layer and an organic thin film encapsulation layer stacked together. The specific arrangement of the encapsulation layer 7 is similar to that of the prior art, and will not be described in detail here.

[0058] In some specific embodiments, such as Figure 1 As shown, the light emitted by the light-emitting unit 21 is transmitted sequentially through the dimming layer 41 and the micromirror layer 42. The dimming layer 41 is located on the side of the light-emitting device layer 2 away from the substrate 1 and includes multiple dimming structures 411. The dimming structures are polyhedral structures. Specifically, the bottom surface of the polyhedral structure is close to the substrate, and the vertices of the polyhedral structure are away from the substrate. The micromirror layer 42 is located on the side of the dimming layer 41 away from the substrate 1 and includes multiple microprism structures 421. The microprism structures 421 are polyhedral structures. The orthographic projection of the micromirror layer 42 on the substrate 1 coincides with the orthographic projection of the dimming layer 41 on the substrate 1. The distance from the plane of the portion of the dimming layer 41 away from the substrate (i.e., the plane where the vertices of all the dimming structures 411 are located) to the substrate 1 is equal to the distance from the plane of the portion of the micromirror layer 42 away from the substrate (i.e., the plane where the top surfaces of all the microprism structures 421 are located) to the substrate 1.

[0059] Specifically, Figure 1 Detailed magnified images of the corresponding dimming structure 411 and microprism structure 421 are shown below. Figure 2 As shown, the top view of adjusting optical path layer 4 is as follows. Figure 3 As shown. The dimming structure 411 is a pentahedron, and the microprism structure 421 includes four pentahedral prism structures, which respectively cover the four upper surfaces of the dimming structure 411 (the other four surfaces of the pentahedral dimming structure 411 excluding the bottom surface). Figure 4 As shown, the light emitted by the light-emitting unit 21 is transmitted through the dimming structure 411 and the microprism structure 421 in sequence. Since the refractive index of the dimming structure is less than that of the microprism structure 421, the emitted light is refracted to both sides of the dimming structure (away from the central axis of the dimming structure), which disperses the emitted light from the main viewing angle to a certain extent and alleviates the problem of large brightness decay of the side viewing angle of the display panel.

[0060] In other specific embodiments, such as Figure 5As shown, the light emitted by the light-emitting unit 21 is transmitted sequentially through the micromirror layer 42 and the dimming layer 41. The micromirror layer 42 is located on the side of the light-emitting device layer 2 away from the substrate 1 and includes multiple microprism structures 421, which are polyhedral. The dimming layer 41 is located on the side of the micromirror layer 42 away from the substrate 1 and includes multiple dimming structures 411, which are polyhedral. The orthographic projection of the micromirror layer 42 on the substrate 1 coincides with the orthographic projection of the dimming layer 41 on the substrate 1, and the distance from the plane of the portion of the dimming layer 41 away from the substrate (i.e., the plane where the top surfaces of all dimming structures 411 are located) to the substrate 1 is equal to the distance from the plane of the portion of the micromirror layer 42 away from the substrate (i.e., the plane where the vertices of all microprism structures 421 are located) to the substrate 1.

[0061] Specifically, the microprism structure 421 includes a pentahedral prism structure, such as... Figure 6 As shown, the light emitted by the light-emitting unit 21 is transmitted through the microprism structure 421 and the dimming structure 411 in sequence. Since the refractive index of the microprism structure 421 is less than that of the dimming structure 411, the emitted light is refracted to both sides of the microprism structure 421 (away from the central axis of the microprism), which disperses the emitted light at the main viewing angle to a certain extent and alleviates the problem of large brightness attenuation at the side viewing angle.

[0062] In some other specific embodiments, such as Figure 7 As shown, the micromirror layer 42 is located on the side of the light-emitting device layer 2 away from the substrate 1, and includes multiple microlens structures 422, each of which corresponds to a light-emitting unit 21. The dimming layer 41 is located on the side of the micromirror layer 42 away from the substrate 1. The orthographic projection of the dimming layer 41 on the substrate 1 covers the orthographic projection of the microlens structure 422 on the substrate 1, and the distance between the plane of the dimming layer 41 and the substrate 1 is greater than the distance between the plane of the top of the microlens structure 422 and the substrate 1.

[0063] Specifically, the cross-section of the adjustment optical path layer 4 in the plane parallel to the upper surface of the substrate 1 is as follows: Figure 8 As shown, the radii of curvature of the microlens structures 422 are all the same. The light emitted by the light-emitting unit 21 is transmitted through the microlens structure 422 and the dimming layer 41 in sequence. Since the refractive index of the microprism structure 421 is less than that of the dimming layer 41, the emitted light is refracted towards the microlens structure 421 in a direction away from the central axis of the microprism. This disperses the emitted light from the main viewing angle to a certain extent and alleviates the problem of large brightness attenuation from the side viewing angle.

[0064] Because the light-emitting units 21 have different colors, the brightness attenuation of the emitted light varies accordingly, such as... Figures 9a-9b As shown in the figure (the horizontal axis represents the viewing angle, and the vertical axis represents the relative brightness, where the positive viewing angle is zero), where... Figure 9a This is a graph showing the brightness decay trend of blue light-emitting units. Figure 9b The graph shows the brightness decay trend of the red light-emitting unit. Within a certain side viewing angle range, the brightness decay of the blue light-emitting unit is more severe than that of the red light-emitting unit. The inventors discovered that by changing the radius of curvature of part of the microlens structure 422, the problem of different brightness decay of different light-emitting units 21 can be further reduced.

[0065] In some specific embodiments, the cross-section of the adjustment optical path layer 4 in the plane parallel to the upper surface of the substrate 1 is as follows: Figure 10 As shown, the microlens structure 422 includes a first microlens 422a and a second microlens 422b. The radius of curvature of the first microlens 422a is different from that of the second microlens 422b. The wavelength of the light emitted by the light-emitting unit 21 corresponding to the first microlens 422a is different from that of the light emitted by the light-emitting unit 21 corresponding to the second microlens 422b.

[0066] In some specific embodiments, the first microlens 422a corresponds to the red light-emitting unit, and the second microlens 422b corresponds to the blue light-emitting unit. The radius of curvature of the first microlens 422a is larger than that of the second microlens 422b. In one specific embodiment, the pixel arrangement of the display panel is a diamond arrangement. The area of ​​the blue light-emitting unit is the same as that of the red light-emitting unit. However, since the brightness attenuation of the blue light-emitting unit is more severe than that of the red light-emitting unit, in order to further adjust the angle of the emitted light from the second microlens 422b corresponding to the blue light emission, the radius of curvature of the second microlens 422b is reduced. That is, the radius of curvature of the first microlens 422a is larger than that of the second microlens 422b. After setting the brightness enhancement layer and the optical path adjustment layer, the brightness attenuation of the display panel under white light is significantly improved. Figures 11a-11b As shown in the figure (the horizontal axis represents the viewing angle, and the vertical axis represents the relative brightness, where the positive viewing angle is zero), where... Figure 11a To improve the brightness decay trend diagram of the original white light, Figure 11b The improved white light brightness decay trend chart shows that, after the display panel was improved, although the brightness at the front viewing angle decreased by 80%, the brightness decay at the side viewing angle was significantly slowed down.

[0067] Based on the same inventive concept, this application provides a display device including the aforementioned display panel. Since the display device includes the aforementioned display panel, it possesses the same beneficial technical effects as the aforementioned display panel. Therefore, the beneficial effects of the display device will not be repeated here.

[0068] Based on the same inventive concept, embodiments of this application provide a method for manufacturing a display panel, such as... Figure 12 As shown, the preparation method includes:

[0069] S101, Provide a substrate 1;

[0070] S102. A light-emitting device layer 2 is formed on one side of the substrate 1. The light-emitting device layer 2 includes a plurality of light-emitting units 21.

[0071] S103. A light-enhancing layer 3 is formed on the side of the light-emitting device layer 2 away from the substrate 1;

[0072] S104. An adjustment light path layer 4 is formed on the side of the brightness enhancement layer 3 away from the substrate 1, wherein the adjustment light path layer 4 includes a dimming layer 41 and a micromirror layer 42.

[0073] In some specific embodiments, before forming the brightness enhancement layer 3, an encapsulation layer 7 is formed on the side of the light-emitting device layer 2 away from the substrate. After forming the optical path adjustment layer 4, a quarter-wave plate 5 and a polarizer 6 are sequentially formed on the side of the optical path adjustment layer 4 away from the substrate 1.

[0074] In some specific embodiments, an optical path adjustment layer 4 is formed on the side of the brightness enhancement layer 3 away from the substrate 1, including the sequential formation of a micromirror layer 42 and a dimming layer 41 on the side of the brightness enhancement layer 3 away from the substrate 1. Specifically, referring to... Figure 1 and Figure 7 A light-emitting device layer 2 is formed on one side of the provided substrate 1. A brightness enhancement layer 3 is formed on the side of the light-emitting device layer 2 away from the substrate 1. A micromirror layer 42 and a dimming layer 41 are formed sequentially on the side of the brightness enhancement layer 3 away from the substrate 1. A quarter-wave plate 5 and a polarizer 6 are formed on the side of the dimming layer 41 away from the substrate 1.

[0075] Alternatively, continue to refer to Figure 5 A light-emitting device layer 2 is formed on one side of the provided substrate 1, a brightness enhancement layer 3 is formed on the side of the light-emitting device layer 2 away from the substrate 1, and a light-adjusting path layer 4 is formed on the side of the brightness enhancement layer 3 away from the substrate 1. The light-adjusting path layer 4 includes a dimming layer 41 and a micromirror layer 42. The light-adjusting path layer 4 is formed as a whole directly on the side of the brightness enhancement layer 3 away from the substrate 1.

[0076] By applying the embodiments of this application, at least the following beneficial effects can be achieved:

[0077] In the display panel provided in this application embodiment, by setting a brightness enhancement layer on the side of the light-emitting device layer away from the substrate, the emitted light is converted into circularly polarized light. Part of the circularly polarized light is transmitted and emitted, and part of the circularly polarized light is reflected and emitted through the light-emitting device layer. This not only alleviates the decrease in display contrast caused by incident light passing through the light-emitting device layer, but also increases the light extraction efficiency of the emitted light of the display panel. By setting an adjustment light path layer on the side of the brightness enhancement layer away from the substrate, the emitted light is refracted in a direction away from the central axis of the light-emitting unit using a micromirror layer. This balances the brightness of the display panel at the front and side viewing angles, thereby improving the light emission efficiency of the light-emitting unit and reducing the problems of large brightness attenuation and color shift at the side viewing angle.

[0078] Those skilled in the art will understand that the steps, measures, and solutions in the various operations, methods, and processes discussed in this application can be alternated, modified, combined, or deleted. Furthermore, other steps, measures, and solutions in the various operations, methods, and processes discussed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and solutions in the prior art that are similar to those disclosed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted.

[0079] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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. Therefore, they should not be construed as limitations on this application.

[0080] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0081] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0082] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0083] It should be understood that although the steps in the flowcharts of the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0084] The above description is only a partial embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A display panel, characterized in that, include: Substrate; A light-emitting device layer, located on one side of the substrate, includes multiple light-emitting units; A light enhancement layer is located on the side of the light-emitting device layer away from the substrate, and is used to increase the light extraction efficiency of the light-emitting device layer; An adjustable optical path layer is located on the side of the light enhancement layer away from the substrate, and includes a dimming layer and a micromirror layer. The light emitted by the light-emitting unit is transmitted sequentially through the dimming layer and the micromirror layer, or the light emitted by the light-emitting unit is transmitted sequentially through the micromirror layer and the dimming layer. Wherein: if the light emitted by the light-emitting unit is transmitted sequentially through the dimming layer and the micromirror layer, the refractive index of the dimming layer is less than the refractive index of the micromirror layer; If the light emitted by the light-emitting unit is transmitted sequentially through the micromirror layer and the dimming layer, the refractive index of the dimming layer is greater than the refractive index of the micromirror layer.

2. The display panel according to claim 1, characterized in that, The relative refractive index of the micromirror layer and the dimming layer is 1.35-1.

45.

3. The display panel according to claim 1, characterized in that, The light emitted by the light-emitting unit is transmitted sequentially through the dimming layer and the micromirror layer; The dimming layer is located on the side of the light-emitting device layer away from the substrate, and includes multiple dimming structures, wherein the dimming structures are in the form of polyhedral structures; The micromirror layer is located on the side of the dimming layer away from the substrate, and includes multiple microprism structures, which are polyhedral in shape. The orthographic projection of the micromirror layer on the substrate coincides with the orthographic projection of the dimming layer on the substrate, and the distance from the substrate to the plane containing the portion of the dimming layer away from the substrate is equal to the distance from the substrate to the plane containing the portion of the micromirror layer away from the substrate.

4. The display panel according to claim 1, characterized in that, The light emitted by the light-emitting unit is transmitted sequentially through the micromirror layer and the dimming layer; The micromirror layer is located on the side of the light-emitting device layer away from the substrate, and includes multiple microprism structures, wherein the microprism structures are polyhedral. The dimming layer is located on the side of the micromirror layer away from the substrate, and includes multiple dimming structures, wherein the dimming structures are in the form of polyhedral structures; The orthographic projection of the micromirror layer on the substrate coincides with the orthographic projection of the dimming layer on the substrate, and the distance from the substrate to the plane containing the portion of the dimming layer away from the substrate is equal to the distance from the substrate to the plane containing the portion of the micromirror layer away from the substrate.

5. The display panel according to claim 1, characterized in that, The micromirror layer is located on the side of the light-emitting device layer away from the substrate, and includes multiple microlens structures, each of which corresponds to a light-emitting unit. The dimming layer is located on the side of the microlens layer away from the substrate. The orthographic projection of the dimming layer on the substrate covers the orthographic projection of the microlens structure on the substrate. Furthermore, the distance between the plane containing the dimming layer and the substrate is greater than the distance between the plane containing the top of the microlens structure and the substrate.

6. The display panel according to claim 5, characterized in that, The microlens structure includes a first microlens and a second microlens, wherein the radius of curvature of the first microlens is different from that of the second microlens. Wherein, the wavelength of the light emitted by the light-emitting unit corresponding to the first microlens is different from the wavelength of the light emitted by the light-emitting unit corresponding to the second microlens.

7. The display panel according to claim 6, characterized in that, The first microlens corresponds to the red light-emitting unit, and the second microlens corresponds to the blue light-emitting unit. The radius of curvature of the first microlens is greater than that of the second microlens.

8. The display panel according to claim 1, characterized in that, Also includes: A polarizer and a quarter-wave plate, wherein the quarter-wave plate is located on the side of the adjustment optical path layer away from the substrate; The polarizer is located on the side of the quarter-wave plate away from the substrate; An encapsulation layer is located between the light-emitting device layer and the brightness enhancement layer; The material of the brightening layer includes cholesteric liquid crystal material.

9. A display device, characterized in that, Includes the display panel as described in any one of claims 1-8.

10. A method for manufacturing a display panel as described in any one of claims 1-8, characterized in that, include: Provide a substrate; A light-emitting device layer is formed on one side of the substrate, and the light-emitting device layer includes a plurality of light-emitting units; A light-enhancing layer is formed on the side of the light-emitting device layer away from the substrate; An adjustment optical path layer is formed on the side of the brightness enhancement layer away from the substrate, wherein the adjustment optical path layer includes a dimming layer and a micromirror layer.

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