Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises a first substrate assembly, a second substrate assembly and a liquid crystal layer, wherein the first substrate assembly and the second substrate assembly are oppositely arranged, and the liquid crystal layer is arranged between the first substrate assembly and the second substrate assembly. The second substrate assembly comprises a second substrate and a metasurface structure layer which are sequentially stacked in the direction towards the liquid crystal layer; in the first working mode, the liquid crystal layer works in a liquid crystal prism state, and the phase change directions of the same light passing through the liquid crystal layer and the metasurface structure layer are opposite; and in the second working mode, the liquid crystal layer works in a liquid crystal prism state, and the phase change directions of the same light passing through the liquid crystal layer and the metasurface structure layer respectively are the same. According to the display panel, the usage amount of liquid crystal materials can be saved, the material cost is reduced, meanwhile, rapid and efficient mode switching among different working modes is achieved, and the requirement for rapid response is met.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] With the continuous development of display technologies, the full liquid crystal lens 3D display technology has received extensive attention in the 2D / 3D display field.

[0003] Currently, in order to achieve a sufficiently large phase delay, a relatively thick liquid crystal prism (for example, with a thickness of about 100 μm) is usually adopted. Although this design can meet certain optical performance requirements, it inevitably brings the following problems: First, the thickness of the liquid crystal prism significantly increases the material usage, resulting in a relatively high material cost; second, the relatively thick liquid crystal layer significantly reduces the response speed of 2D / 3D mode switching and cannot meet the current application requirements for fast response.

[0004] Therefore, the traditional full liquid crystal lens 3D display technology still has obvious defects in terms of material cost, switching speed, and response performance.

[0005] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present application, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0006] Based on this, the embodiments of the present application provide a display panel and a display device, which can save the usage of liquid crystal materials, reduce the material cost, and at the same time achieve fast and efficient mode switching between different working modes to meet the requirements of fast response.

[0007] According to some embodiments, on the one hand, the present application provides a display panel, including a first substrate assembly and a second substrate assembly arranged oppositely, and a liquid crystal layer disposed between the first substrate assembly and the second substrate assembly;

[0008] wherein, the second substrate assembly includes a second substrate and a metasurface structure layer stacked in sequence along the direction towards the liquid crystal layer;

[0009] The display panel has a first working mode and a second working mode; in the first working mode, the liquid crystal layer operates in the liquid crystal prism state, and the phase change directions of the same light passing through the liquid crystal layer and the metasurface structure layer are opposite; in the second working mode, the liquid crystal layer operates in the liquid crystal prism state, and the phase change directions of the same light passing through the liquid crystal layer and the metasurface structure layer are the same.

[0010] In some embodiments, the metasurface structure layer includes a metalens.

[0011] In some embodiments, the metalens includes a metalens fabricated by a nanoimprint process.

[0012] In some embodiments, the same light ray generates a first phase change amount when passing through the liquid crystal layer and a second phase change amount when passing through the metasurface structure layer;

[0013] In the second working mode, the total phase delay obtained by superimposing the first phase change amount and the second phase change amount is a preset phase change amount.

[0014] In some embodiments, the display panel includes a plurality of dimming regions;

[0015] The first substrate assembly includes a first substrate and a first electrode layer stacked in sequence along the direction towards the liquid crystal layer. The first electrode layer includes a plurality of first electrode groups corresponding to the plurality of dimming regions. Each first electrode group includes a plurality of first electrodes arranged along a preset direction; the second substrate assembly further includes a second electrode layer disposed on the surface of the metasurface structure layer away from the second substrate;

[0016] In the first working mode, the voltage configurations of the plurality of first electrodes in the first electrode group show a decreasing trend from the edge to the center; in the second working mode, the voltage configurations of the plurality of first electrodes in the first electrode group show an increasing trend from the edge to the center.

[0017] In some embodiments, the first electrode layer and the second electrode layer include the same constituent materials.

[0018] In some embodiments, the second substrate assembly further includes a protective layer located on the surface of the metasurface structure layer away from the second substrate.

[0019] In some embodiments, the second substrate assembly further includes an organic thin film layer located on the surface of the metasurface structure layer away from the second substrate.

[0020] In some embodiments, the manufacturing material of the metalens includes a resin material.

[0021] According to some embodiments, another aspect of the present application further provides a display device, including the display panel provided in the foregoing embodiments.

[0022] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application.

[0023] The embodiments of the present application may / at least have the following advantages:

[0024] In the embodiment of the present application, a metasurface structure layer is provided in the second substrate assembly. The metasurface structure layer can achieve optical regulation with a fixed period and phase, undertakes part of the function of phase delay, and the liquid crystal layer no longer needs a large thickness to achieve phase regulation. Due to the introduction of the metasurface structure layer, the thickness of the liquid crystal layer can be reduced, thereby saving the usage amount of liquid crystal materials and reducing the material cost. Through the collaborative work of the metasurface structure layer and the liquid crystal layer, the range and amplitude of the phase change that the liquid crystal layer needs to adjust are reduced, and the thickness of the liquid crystal layer is reduced. Thus, the response time of the liquid crystal molecules in the liquid crystal layer is shortened, thereby realizing fast and efficient mode switching between different working modes of the display panel, meeting the requirement of fast response, and helping to improve the overall response performance of the display panel.

[0025] Other advantages, objectives, and features of the present application will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present application. The objectives and other advantages of the present application can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objectives, and advantages of the present application will become more obvious.

[0027] Figure 1 is a schematic structural diagram of the display panel in the first working mode in some embodiments of the present application;

[0028] Figure 2 is a schematic structural diagram of the display panel in the second working mode in some embodiments of the present application;

[0029] Figure 3 is a schematic diagram of the phase change generated by the display panel in the first working mode in some embodiments of the present application;

[0030] Figure 4 is a schematic diagram of the phase change generated by the display panel in the second working mode in some embodiments of the present application;

[0031] Figure 5 is a schematic structural diagram of the display panel including a protective layer and an organic thin film layer in the first working mode in some embodiments of the present application;

[0032] Figure 6 is a schematic structural diagram of the display panel using a metalens in the first working mode in some embodiments of the present application;

[0033] Figure 7 is a schematic structural diagram of the display panel using a metalens in the second working mode in some embodiments of the present application;

[0034] Figure 8 It is a schematic structural diagram of a display device in some embodiments of the present application.

[0035] Explanation of reference numerals in the drawings:

[0036] 1. Display panel; 1'. Light source; 10. First substrate assembly; 101. First substrate; 102. First electrode; 20. Second substrate assembly; 201. Second substrate; 202. Metasurface structure layer; 203. Second electrode layer; 204. Protective layer; 205. Organic thin film layer; 30. Liquid crystal layer; 301. Liquid crystal molecules. Specific embodiments

[0037] For ease of understanding the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the specification of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0039] In the drawings, the dimensions of layers and regions may be exaggerated for clarity. It can be understood that when a layer or element is referred to as being "on one side" of another layer or substrate, the layer or element can be directly on the other layer or substrate, or an intermediate layer may also exist. Additionally, it can also be understood that when a layer is referred to as being "between" two layers, the layer can be the only layer between the two layers, or one or more intermediate layers may also exist. Additionally, the same reference numerals always represent the same elements.

[0040] Hereinafter, although terms such as "first" and "second" may be used to describe various components, these components do not necessarily have to be limited to the above terms. The above terms are only used to distinguish one component from another. It will also be understood that an expression used in the singular form includes the plural form, unless the singular form of the expression has a significantly different meaning in the context.

[0041] It should also be understood that the terms "comprising / including" or "having" as used herein specify the presence of the stated features, wholes, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, components, parts, or combinations thereof.

[0042] Without departing from the spirit or scope of the present application, various modifications and variations can be made in the present application, which will be apparent to those skilled in the art. Therefore, the present application is intended to cover the modifications and variations of the present application that fall within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in the present application can be combined with each other without conflict.

[0043] Currently, in order to achieve a sufficiently large phase delay, a relatively thick liquid crystal prism (for example, with a thickness of about 100 μm) is usually adopted. Although this design can meet certain optical performance requirements, it inevitably brings the following problems: First, the thickness of the liquid crystal prism significantly increases the material usage, resulting in a relatively high material cost; Second, the relatively thick liquid crystal layer will significantly reduce the response speed of 2D / 3D mode switching and cannot meet the current application requirements for fast response.

[0044] In view of the deficiencies in the above related technologies, the present application provides a display panel and a display device, which can save the usage of liquid crystal materials, reduce the material cost, and at the same time achieve fast and efficient mode switching between different working modes to meet the requirements of fast response. The detailed content will be elaborated in the subsequent embodiments.

[0045] Exemplarily, the display panel involved in the present application may include a liquid crystal display panel (Liquid Crystal Display, abbreviated as LCD) or a mini light emitting diode display (Mini Light Emitting Diode Display, abbreviated as Mini LED), etc., but is not limited thereto. In the embodiments of the present application, the display panel is taken as an LCD display panel as an example for illustration.

[0046] According to some embodiments, the present application provides a display panel on the one hand. Please refer to Figure 1 and Figure 2 , the display panel includes a first substrate assembly 10 and a second substrate assembly 20 which are oppositely arranged, and a liquid crystal layer 30 disposed between the first substrate assembly 10 and the second substrate assembly 20.

[0047] Wherein, the second substrate assembly 20 includes a second substrate 201 and a metasurface structure layer 202 which are sequentially stacked in the direction towards the liquid crystal layer 30.

[0048] When light passes through the display panel, it will successively pass through the liquid crystal layer 30 and the metasurface structure layer 202. Therefore, the total phase change is the superposition of the phase change caused by the metasurface structure layer 202 and the phase change caused by the liquid crystal layer 30.

[0049] The display panel has a first working mode and a second working mode. By reasonably adjusting the driving voltage of the liquid crystal layer 30, the relationship between the phase changes of the two can be controlled, thereby realizing the conversion between the first working mode and the second working mode.

[0050] Figure 1 Fig. shows the schematic structural diagram of the display panel in the first working mode. In the first working mode, the liquid crystal layer 30 operates in the liquid crystal prism state, and the phase change directions of the same light passing through the liquid crystal layer 30 and the metasurface structure layer 202 are opposite.

[0051] Figure 2 Fig. shows the schematic structural diagram of the display panel in the second working mode. In the second working mode, the liquid crystal layer 30 operates in the liquid crystal prism state, and the phase change directions of the same light passing through the liquid crystal layer 30 and the metasurface structure layer 202 are the same.

[0052] In a traditional display panel, phase adjustment completely depends on the thickness of the liquid crystal layer and the orientation change of liquid crystal molecules. Therefore, a relatively thick liquid crystal layer is required to achieve sufficient phase delay, resulting in a high material cost, and the response time of liquid crystal molecules is relatively long. Especially when fast switching of the display mode is required, the efficiency is insufficient.

[0053] The above display panel is provided with a metasurface structure layer 202 in the second substrate assembly 20. The metasurface structure layer 202 can realize optical adjustment with a fixed period and phase, assuming part of the phase delay function. The liquid crystal layer 30 no longer needs a large thickness to achieve phase adjustment. For example, in a traditional display panel, the thickness of the liquid crystal layer may need to reach 100 μm or even higher. However, in the above display panel, due to the introduction of the metasurface structure layer 202, the thickness of the liquid crystal layer 30 can be reduced, thereby saving the usage amount of liquid crystal materials and reducing the material cost.

[0054] Through the collaborative work of the metasurface structure layer 202 and the liquid crystal layer 30, the range and amplitude of the phase change that the liquid crystal layer 30 needs to adjust are reduced, and the thickness of the liquid crystal layer 30 is decreased. As a result, the response time of the liquid crystal molecules 301 in the liquid crystal layer 30 is shortened, thereby realizing fast and efficient mode switching between different working modes of the display panel, meeting the requirements of fast response, and helping to improve the overall response performance of the display panel.

[0055] For the sake of easy understanding, in this article, it is defined that the same light generates a first phase change amount when passing through the liquid crystal layer 30, and generates a second phase change amount when passing through the metasurface structure layer 202.

[0056] Please refer to Figure 3It is understood that in the first working mode, by adjusting the driving voltage of the liquid crystal layer 30, the phase change caused by the liquid crystal layer 30 can be made to be in the opposite direction to the phase change caused by the metasurface structure layer 202. Since the phase change directions of the two are opposite, the result of their superposition is a constant, that is, the total phase change remains unchanged. At this time, the overall optical effect jointly produced by the liquid crystal layer 30 and the metasurface structure layer 202 is equivalent to a plane mirror, which will not change the propagation path of light, thus realizing the 2D display state.

[0057] Please refer to Figure 4 It is understood that in the second working mode, by adjusting the driving voltage of the liquid crystal layer 30, the phase change caused by the liquid crystal layer 30 can be made to be in the same direction as the phase change caused by the metasurface structure layer 202. Since the phase change directions of the two are the same, in some embodiments, the total phase delay obtained by superimposing the first phase change amount and the second phase change amount is a preset phase change amount, and the preset phase change amount refers to the phase change requirement in actual applications, that is, the total phase change reaches the degree required to achieve 3D display. At this time, the overall optical effect jointly produced by the liquid crystal layer 30 and the metasurface structure layer 202 is equivalent to a 3D prism, which can change the propagation path of light and realize the 3D display state.

[0058] In the above embodiments, when the display panel needs to present a 3D display effect, the required total phase change can be first determined according to the actual application scenario (such as the display content or viewing angle requirement), and by precisely adjusting the driving voltage of the liquid crystal layer 30, the flipping angle of the liquid crystal molecules 301 can be controlled, and the phase change caused by the liquid crystal layer 30 can be adaptively adjusted, so that the liquid crystal layer 30 and the metasurface structure layer 202 jointly act to achieve the required 3D display effect.

[0059] It can be understood that the above adjustment process is adaptive and can be adjusted in a timely manner according to different display requirements to ensure that the display effect matches the target 3D display effect.

[0060] Exemplarily, the display panel includes a plurality of dimming regions. When the liquid crystal layer 30 operates in the liquid crystal prism state, one dimming region corresponds to the formation of one liquid crystal prism. Please refer to the following in combination with Figure 1 and Figure 2 for understanding. Figure 1 and Figure 2 Both show a partial structural schematic diagram of one dimming region of the display panel.

[0061] As shown in Figure 1 and Figure 2As shown, the first substrate assembly 10 includes a first substrate 101 and a first electrode layer stacked in sequence in the direction towards the liquid crystal layer 30. The first electrode layer includes a plurality of first electrode groups corresponding to a plurality of dimming regions. Each first electrode group includes a plurality of first electrodes 102 arranged in a preset direction, serving as working electrodes for controlling the flipping of liquid crystal molecules 301. The second substrate assembly 20 further includes a second electrode layer 203 disposed on the surface of the metasurface structure layer 202 away from the second substrate 201.

[0062] In some embodiments, in the first operating mode, the voltage configurations of the plurality of first electrodes 102 in the first electrode group show a decreasing trend from the edge to the center. That is, in a dimming region, a locally lowest first electrode voltage appears in the central region. In the second operating mode, the voltage configurations of the plurality of first electrodes 102 in the first electrode group show an increasing trend from the edge to the center. That is, in a dimming region, a locally highest first electrode voltage appears in the central region.

[0063] In the above embodiments, specific examples of the voltage configurations are described as follows:

[0064] Specifically, in the embodiments of the present application, when the display panel changes from the second operating mode to the first operating mode, the phase change caused by the liquid crystal layer 30 changes. The specific manifestations include that the liquid crystal molecules 301 flip to a specific angle. At this time, the equivalent refractive index n of the liquid crystal prism is between no and ne (no < ne), where no is the equivalent refractive index of the liquid crystal layer 30 when it operates in the transmission state, and ne is the equivalent refractive index of the liquid crystal layer 30 when it operates in the liquid crystal prism state.

[0065] The first electrode group includes 2N + 1 first electrodes 102 arranged in a preset direction, and the voltages configured for the 2N + 1 first electrodes 102 are V1, V2,... V N 、…V 2N 、V 2N +1.

[0066] In the first operating mode, the voltage configurations of the 2N + 1 first electrodes 102 in the first electrode group show a gradually decreasing trend from the edge to the center, satisfying the voltage relationship V1 > V2 >... > V N <…<V 2N <V 2N+1 , that is, higher voltages are applied to the edge electrodes (such as V1 and V 2N+1 ), while lower voltages are applied to the central electrode (such as V N ).

[0067] In the second operating mode, the voltage configurations of the 2N + 1 first electrodes 102 of the first electrode group show a gradually increasing trend from the edge to the center, satisfying the voltage relationship V1 < V2 < … < V N > … > V 2N > V 2N+1 , which is opposite to the first operating mode. At this time, a relatively high voltage (such as V N ) is applied to the central electrode, while relatively low voltages (such as V1 and V 2N+1 ) are applied to the edge electrodes.

[0068] Exemplarily, the above 2N + 1 first electrodes 102 can be evenly distributed along a preset direction, and a gradient electric field is formed through voltage regulation.

[0069] The embodiments of the present application do not limit the specific constituent materials of the first electrode layer and the second electrode layer 203. In some embodiments, the first electrode layer and the second electrode layer 203 may include the same constituent materials.

[0070] As an example, the first electrode layer and the second electrode layer 203 may both be made of ITO (indium tin oxide) material. ITO has good electrical conductivity, can effectively conduct current, form a stable electric field, and is used to control the flipping of liquid crystal molecules 301. A uniform electric field distribution can avoid the response delay problem caused by uneven voltage, thereby further improving the overall response performance of the display panel.

[0071] For example, multiple first electrodes 102 in the first electrode layer are ITO metal electrodes, and the second electrode layer 203 is a continuous transparent conductive layer that at least covers the display area, that is, a common ITO (Common ITO) layer. The ITO metal electrodes and the Common ITO layer can jointly form an electric field to control the flipping of liquid crystal molecules 301.

[0072] Please refer to Figure 5 , in some embodiments, the second substrate assembly 20 may further include a protective layer (PV) 204, which is located on the surface of the metasurface structure layer 202 away from the second substrate 201, and can isolate and protect the metasurface structure layer 202, preventing water vapor and / or oxygen from penetrating into the metasurface structure layer 202, and ensuring the use stability of the metasurface structure layer 202.

[0073] Please continue to refer to Figure 5 , in some embodiments, the second substrate assembly 20 may further include an organic thin film (ORG) layer 205, which is located on the surface of the metasurface structure layer 202 away from the second substrate 201. The organic thin film layer 205 is beneficial to reducing light scattering, thereby improving the color uniformity and contrast of the display panel, achieving a more uniform color distribution, and thus enhancing the overall visual quality of the display panel.

[0074] As an example, the protective layer 204 and the organic thin film layer 205 can be sequentially stacked on the surface of the metasurface structure layer 202 away from the second substrate 201.

[0075] It should be noted that, in the embodiments of the present application, the metasurface structure layer 202 refers to a nanostructure layer composed of many sub-wavelength-sized units, and this nanostructure layer can modulate the light wave passing through it to achieve specific optical functions, such as changing the polarization, phase, amplitude, and direction of light, etc.

[0076] Please refer to Figure 6 and Figure 7 , in some embodiments, the metasurface structure layer 202 may include a metalens, that is, an optical lens based on metasurface technology, but is not limited thereto.

[0077] Compared with traditional optical lenses, metalenses are not only very thin and light, suitable for applications in optical systems that require a compact design, such as AR / VR devices, etc., but also can achieve efficient phase modulation.

[0078] As an example, the above metalens may include a metalens fabricated by a nanoimprint process.

[0079] The nanoimprint process can replicate sub-wavelength nanostructures with high precision, thereby obtaining a metalens with fine optical functions, enabling the metalens to more precisely control the phase change of light, thus achieving a more precise phase modulation effect and further improving the display effect of the display panel.

[0080] The embodiments of the present application do not specifically limit the specific manufacturing materials of the above metalens. In some embodiments, the manufacturing materials of the metalens may include resin materials. Resin materials are not only light in weight, which can avoid increasing the overall weight of the product, but also have a low processing cost, which is beneficial to further reducing the manufacturing cost of the display panel.

[0081] It can be understood that the display panel of the present application may also include other existing structures that support the operation of the display panel. For example, the display panel may also include a light source 1', which is used to provide necessary light for the display panel so that the display panel can present a visible display image.

[0082] Based on the same inventive concept, the embodiments of the present application also provide a display device. Please refer to Figure 8 Understand that this display device includes the display panel 1 provided in the foregoing embodiments. The technical effects that the foregoing display panel 1 can achieve, this display device can also achieve, and will not be elaborated here.

[0083] It can be understood that the display device in the embodiments of the present application can be any product or component with a display function, such as a liquid crystal display, an electronic paper, a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, a wearable device, an Internet of Things device, etc. The embodiments of the present application do not limit this.

[0084] In the description of this specification, the descriptions referring to terms such as "some embodiments", "as an example", "exemplarily", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0085] It should be noted that the devices for obtaining the time scale value in the embodiments of the present application can all be used to implement the corresponding method for obtaining the time scale value. Therefore, the technical features between the method embodiments and the device embodiments can be mutually replaced and supplemented on the premise of not generating conflicts, so that those skilled in the art can learn about the technical content of the present application.

[0086] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features of the above-described embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as within the scope described in this specification.

[0087] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A display panel, characterized in that, It includes a first substrate assembly and a second substrate assembly which are oppositely arranged, and a liquid crystal layer disposed between the first substrate assembly and the second substrate assembly; Wherein, the second substrate assembly includes a second substrate and a metasurface structure layer which are sequentially stacked in a direction towards the liquid crystal layer; The display panel has a first working mode and a second working mode; in the first working mode, the liquid crystal layer operates in a liquid crystal prism state, and the phase change directions of the same light passing through the liquid crystal layer and the metasurface structure layer are opposite; in the second working mode, the liquid crystal layer operates in a liquid crystal prism state, and the phase change directions of the same light passing through the liquid crystal layer and the metasurface structure layer are the same.

2. The display panel according to claim 1, wherein The metasurface structure layer includes a metalens.

3. The display panel according to claim 2, wherein The metalens includes a metalens made by a nanoimprint process.

4. The display panel according to claim 1, characterized in that, The same light generates a first phase change amount when passing through the liquid crystal layer, and generates a second phase change amount when passing through the metasurface structure layer; In the second working mode, the total phase delay obtained by superimposing the first phase change amount and the second phase change amount is a preset phase change amount.

5. The display panel according to claim 4, wherein It includes a plurality of dimming regions; The first substrate assembly includes a first substrate and a first electrode layer which are sequentially stacked in a direction towards the liquid crystal layer. The first electrode layer includes a plurality of first electrode groups corresponding to the plurality of dimming regions. Each first electrode group includes a plurality of first electrodes arranged along a preset direction; the second substrate assembly further includes a second electrode layer disposed on the surface of the metasurface structure layer away from the second substrate; In the first working mode, the voltage configurations of the plurality of first electrodes in the first electrode group show a decreasing trend from the edge to the center; In the second working mode, the voltage configurations of the plurality of first electrodes in the first electrode group show an increasing trend from the edge to the center.

6. The display panel according to claim 5, wherein The first electrode layer and the second electrode layer include the same constituent materials.

7. The display panel according to claim 1, wherein The second substrate assembly further includes a protective layer located on the surface of the metasurface structure layer away from the second substrate.

8. The display panel according to claim 1, characterized in that, The second substrate assembly further includes an organic thin film layer located on the surface of the metasurface structure layer away from the second substrate.

9. The display panel according to claim 3, characterized in that The manufacturing material of the metalens includes a resin material.

10. A display device, characterized in that, It includes a display panel according to any one of claims 1 to 9.

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