Display panel, manufacturing method thereof and display device

Abstract

Embodiments of the present application provide a display panel, a manufacturing method thereof and a display device, and relate to the technical field of display. The purpose is to improve the problem of low normal viewing angle brightness of the display panel. The display panel comprises a driving substrate, a pixel definition layer, a light emitting device layer, an encapsulation layer and a light adjusting structure layer. The pixel definition layer and the light emitting device layer are arranged on the driving substrate. The pixel definition layer has a plurality of first openings. The light emitting device layer comprises a plurality of light emitting devices. Each light emitting device is located in one first opening. The light adjusting structure layer comprises a first light adjusting layer, a second light adjusting layer and a third light adjusting layer arranged in sequence in a direction away from the driving substrate. The first light adjusting layer has a second opening corresponding to the first opening. The second light adjusting layer covers at least the sidewall of the second opening. The third light adjusting layer at least fills the second opening. The refractive index of the first light adjusting layer is greater than the refractive index of the second light adjusting layer and less than the refractive index of the third light adjusting layer.

Description

Technical Field

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

[0002] Organic light-emitting diode (OLED) display panels, compared to liquid crystal display (LCD) panels, have advantages such as self-illumination, thinness, high contrast, wide viewing angle, and vibrant colors. Furthermore, OLED display panels are typically much thinner than LCD panels and can be manufactured into various forms such as bent, curved, and rolled displays, making them widely used in wearable devices.

[0003] OLED display panels typically include light-emitting devices for display. However, current OLED display panels often suffer from problems such as a large light emission angle of the light-emitting devices, resulting in low brightness at the forward viewing angle. Summary of the Invention

[0004] This application provides a display panel, a method for manufacturing the same, and a display device to improve the problem of low brightness at the front viewing angle of display panels in related technologies.

[0005] This application provides a display panel, including: a driving substrate, a pixel definition layer, a light-emitting device layer, an encapsulation layer, and a dimming structure layer. The pixel definition layer and the light-emitting device layer are disposed on the driving substrate. The pixel definition layer has a plurality of first openings, and the light-emitting device layer includes a plurality of light-emitting devices, each light-emitting device located in one of the first openings. The encapsulation layer is located on the side of the light-emitting device layer away from the driving substrate. The dimming structure layer is located on the side of the encapsulation layer away from the driving substrate, and the dimming structure layer includes a first dimming layer, a second dimming layer, and a third dimming layer sequentially disposed along a direction away from the driving substrate. The first dimming layer has a second opening corresponding to the first opening, the second dimming layer at least covers the sidewall of the second opening, and the third dimming layer at least fills the second opening. The refractive index of the first dimming layer is greater than the refractive index of the second dimming layer, and the refractive index of the first dimming layer is less than the refractive index of the third dimming layer.

[0006] In some embodiments, the first dimming layer is an organic layer, and the second dimming layer contains at least an organic material, wherein the organic material is made of a different material than the organic layer.

[0007] In some embodiments, the organic compound comprises an -NH-COO- chain structure.

[0008] In some embodiments, the material of the second dimming layer includes polyurethane.

[0009] In some embodiments, the third dimming layer is an adhesive layer.

[0010] In some embodiments, the display panel further includes a polarizing functional layer located on the side of the dimming structure layer away from the encapsulation layer, and the adhesive layer is bonded to the surface of the polarizing functional layer near the dimming functional layer.

[0011] In some embodiments, the third dimming layer comprises acrylic double bonds and benzene rings.

[0012] In some embodiments, the third dimming layer is doped with high-refractive-index particles.

[0013] In some embodiments, the third dimming layer contains small molecule polar functional groups that are attracted to polyurethane.

[0014] In some embodiments, the absolute value of the difference between the refractive index of the first dimming layer and the refractive index of the second dimming layer is less than the absolute value of the difference between the refractive index of the first dimming layer and the refractive index of the third dimming layer.

[0015] In some embodiments, the refractive index of the first dimming layer is greater than or equal to 1.5 and less than or equal to 1.53, the refractive index of the second dimming layer is greater than or equal to 1.4 and less than or equal to 1.5, and the refractive index of the third dimming layer is greater than or equal to 1.55 and less than or equal to 1.6.

[0016] In some embodiments, the refractive index of the first dimming layer is 1.52, the refractive index of the second dimming layer is 1.5, and the refractive index of the third dimming layer is 1.6.

[0017] In some embodiments, the thickness of the second dimming layer is greater than or equal to 10 nm and less than or equal to 100 nm.

[0018] In some embodiments, the second dimming layer is disposed as a whole layer, and the second dimming layer covers the first dimming layer and the second opening.

[0019] In some embodiments, the orthographic projection of the bottom of the second opening on the driving substrate at least partially overlaps with the orthographic projection of the light-emitting device on the driving substrate.

[0020] In some embodiments, the orthographic projection of the bottom of the second opening on the driving substrate covers the orthographic projection of the light-emitting device on the driving substrate, or the orthographic projection of the bottom of the second opening on the driving substrate completely overlaps with the orthographic projection of the light-emitting device on the driving substrate.

[0021] In some embodiments, the second opening penetrates the first dimming layer, and the area of ​​the second opening on the side away from the driving substrate is larger than the area of ​​the second opening on the side close to the driving substrate.

[0022] This application also provides a display device, which includes the display panel described in any of the above embodiments.

[0023] This application embodiment also provides a method for manufacturing a display panel, the method comprising: providing a driving substrate; fabricating a pixel definition layer and a light-emitting device layer on the driving substrate, the pixel definition layer having a plurality of first openings, the light-emitting device layer including a plurality of light-emitting devices, each light-emitting device being located in a first opening; fabricating an encapsulation layer on the side of the light-emitting device layer away from the driving substrate; and fabricating a dimming structure layer on the side of the encapsulation layer away from the driving substrate, the dimming structure layer including a first dimming layer, a second dimming layer, and a third dimming layer sequentially disposed along a direction away from the driving substrate; the first dimming layer having a second opening corresponding to the first opening, the second dimming layer at least covering the sidewall of the second opening, and the third dimming layer at least filling the opening; wherein, the refractive index of the first dimming layer is greater than the refractive index of the second dimming layer, and the refractive index of the first dimming layer is less than the refractive index of the third dimming layer.

[0024] In some embodiments, a dimming structure layer is formed on the side of the encapsulation layer away from the driving substrate, comprising: forming a first dimming layer on the side of the encapsulation layer away from the driving substrate; attaching a protective film to the first dimming layer and performing a degassing treatment; wherein the protective film includes a protective film body and a release agent layer located on the side of the protective film body close to the first dimming layer; peeling off the protective film body, the release agent layer forming a second dimming layer; and forming a third dimming layer on the side of the second dimming layer away from the first dimming layer.

[0025] In this embodiment, the refractive index of the first dimming layer is set to be greater than that of the second dimming layer and less than that of the third dimming layer. This creates a relatively larger difference between the refractive indices of the second and third dimming layers, allowing for a smooth transition interface between them. When light exits from the light-emitting device and enters the third dimming layer from the bottom of the second opening, then strikes this transition interface, total internal reflection easily occurs because the light travels from a high-refractive-index material to a low-refractive-index material. This causes the light originally refracted from the third dimming layer to be reflected back into the normal viewing angle, thereby increasing the brightness at the normal viewing angle and improving the light extraction efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a cross-sectional view of a display panel provided in some embodiments of this application;

[0028] Figure 2 This is a cross-sectional view of a display panel provided in some other embodiments of this application;

[0029] Figure 3 This is a cross-sectional view of a display panel provided in some embodiments of this application;

[0030] Figure 4 This is a flowchart illustrating a method for manufacturing a display panel according to some embodiments of this application;

[0031] Figure 5 This is a flowchart illustrating a method for manufacturing a display panel according to other embodiments of this application.

[0032] Explanation of key component symbols:

[0033] 11. Driving substrate; 12. Pixel definition layer; 13. Light-emitting device layer; 14. Encapsulation layer; 15. Dimming structure layer; 100. Display panel; 111. Substrate; 112. Driving circuit layer; 130. Light-emitting device; 131. Anode; 132. Light-emitting functional layer; 133. Cathode; 141. First encapsulation layer; 142. Second encapsulation layer; 143. Third encapsulation layer; 151. First dimming layer; 152. Second dimming layer; 153. Third dimming layer; 1501. Sidewall; K1. First opening; K2. Second opening. Detailed Implementation

[0034] 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. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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 of this application. Furthermore, 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0037] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0038] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0039] In related technologies, OLED display panels often suffer from problems such as a large light emission angle of the light-emitting devices, resulting in low brightness at the forward viewing angle of the OLED display panel.

[0040] Based on this, some embodiments of this disclosure provide a display panel, such as... Figure 1-3As shown, the display panel 100 includes a driving substrate 11, a pixel definition layer 12, a light-emitting device layer 13, an encapsulation layer 14, and a dimming structure layer 15.

[0041] The pixel definition layer 12 has a plurality of first openings K1, and the light-emitting device layer 13 includes a plurality of light-emitting devices 130 located on the driving substrate 11, each light-emitting device 130 being located in a first opening K1. That is, the number of first openings K1 is the same as the number of light-emitting devices 130 and corresponds one-to-one. The encapsulation layer 14 is located on the side of the light-emitting device layer 13 away from the driving substrate 11 and covers the aforementioned light-emitting devices 130.

[0042] The dimming structure layer 15 is located on the side of the encapsulation layer 14 away from the driving substrate 11. The dimming structure layer 15 includes a first dimming layer 151, a second dimming layer 152, and a third dimming layer 153 sequentially disposed along the direction away from the driving substrate 11. The first dimming layer 151 has a second opening K2 corresponding to the first opening K1. The second dimming layer 152 at least covers the sidewall 1501 of the second opening K2, and the third dimming layer 153 at least fills the second opening K2.

[0043] The refractive index of the first dimming layer 151 is greater than that of the second dimming layer 152, and the refractive index of the first dimming layer 151 is less than that of the third dimming layer 153. Thus, there is a relatively larger difference between the refractive indices of the second dimming layer 152 and the third dimming layer 153. This allows the contact surface between the second dimming layer 152 and the third dimming layer 153 to form a good transition interface, and this transition interface is at least located on the sidewall of the second opening K2.

[0044] like Figure 1 As shown, when light is emitted from the light-emitting device 130 and then enters the third dimming layer 153 from the bottom of the second opening K2 and is directed toward the transition interface, total internal reflection is easily generated because the light is directed from a material with a high refractive index to a material with a low refractive index. This causes the light originally refracted from the third dimming layer 153 to be reflected into the positive viewing angle, thereby improving the brightness of the positive viewing angle and improving the light emission efficiency.

[0045] Therefore, the display panel 100 provided in this embodiment can effectively modulate light, converging light that was originally diffused to a wide viewing angle into a positive viewing angle, thereby improving the brightness of the positive viewing angle and achieving the purpose of improving light emission efficiency.

[0046] In some embodiments, the driving substrate 11 may include a substrate 111 and a driving circuit layer 112 located on the substrate 111. The driving circuit layer 112 can drive the light-emitting device 130 in the light-emitting device layer 13, thereby realizing the light emission of the light-emitting device 130.

[0047] In some embodiments, the substrate 111 may be a rigid substrate. The material of the rigid substrate may include, for example, glass, quartz, or plastic.

[0048] In some embodiments, the substrate 111 may be a flexible substrate. The material of the flexible substrate may include, for example, PET (Polyethylene terephthalate), PEN (Polyethylenenaphthalate dimethyl methacrylate), or PI (Polyimide).

[0049] In some embodiments, the driving circuit layer 112 may include multiple pixel driving circuits, which are electrically connected to the light-emitting devices. The electrical connection between them can be varied and can be selected and configured according to actual needs; this disclosure does not limit this specific connection.

[0050] For example, the pixel driving circuit and the light-emitting device 130 described above can be electrically connected in a one-to-one correspondence. Alternatively, one pixel driving circuit can be electrically connected to multiple light-emitting devices 130. Or, multiple pixel driving circuits can be electrically connected to one light-emitting device 130.

[0051] In some embodiments, the plurality of light-emitting devices 130 may be arranged in an array, and the plurality of pixel driving circuits may also be arranged in an array, thereby facilitating their corresponding connection.

[0052] This disclosure uses an example of a pixel driving circuit and a light-emitting device 130 being electrically connected to illustrate the structure of the display panel 100.

[0053] In some embodiments, such as Figure 1-3 As shown, the light-emitting device 130 includes an anode 131 located on the driving substrate 11, and a light-emitting functional layer 132 and a cathode 133 located on the anode 131 and stacked in sequence.

[0054] The anodes 131 of the multiple light-emitting devices 130 are arranged independently, and there is a gap between any two adjacent anodes 131. For example, the multiple anodes 131 can be arranged in an array.

[0055] The cathodes 133 of multiple light-emitting devices 130 are interconnected to form a cathode layer. For example, the cathode layer can be fabricated using a full-surface vapor deposition process. Thus, the encapsulation layer 14 is disposed on the side of the cathode layer away from the driving substrate 11.

[0056] The light-emitting functional layer 132 includes an emission layer (EML) for emitting light. The emission layers of multiple light-emitting devices 130 can be independently arranged, and there is a gap between any two adjacent emission layers. For example, the emission layers can be arranged in a one-to-one correspondence with the anodes.

[0057] In some embodiments, the light-emitting functional layer 132 may further include a first common layer located between the anode and the light-emitting layer, and a second common layer located between the light-emitting layer and the cathode. The first common layer includes, but is not limited to, a hole injection layer (HIL) and / or a hole transportation layer (HTL), and the second common layer includes, but is not limited to, an electron injection layer and / or an electron transportation layer (ETL). The first common layer and the second common layer may be integrally arranged, for example.

[0058] In some embodiments, the anode 131 and the pixel driving circuit are electrically connected in a one-to-one correspondence to receive driving signals from the pixel driving circuit, while the cathode 133 receives a reference voltage signal. The light-emitting layer in the light-emitting functional layer 132 emits light under the combined action of the driving signal and the reference voltage signal. Multiple light-emitting devices 130 cooperate with each other to realize the display of the image on the display panel 100.

[0059] In some embodiments, the light-emitting device 130 can be a top-emitting light-emitting device. Therefore, the anode 131 is a substantially opaque electrode with high reflectivity, and the cathode 133 is a light-transmitting or semi-transparent electrode. For example, the materials of the cathode 133 include, but are not limited to, magnesium (Mg), silver (Ag), aluminum (Al), magnesium-silver alloys, indium tin oxide (ITO), etc.

[0060] The encapsulation layer 14 located above the light-emitting device 130 can be used to prevent the light-emitting device 130 from being oxidized or damaged due to moisture, oxygen or impurities introduced from the outside.

[0061] The encapsulation layer 14 may include a first encapsulation layer 141, a second encapsulation layer 142 and a third encapsulation layer 143 located on the light-emitting device layer 13 and stacked in sequence.

[0062] The materials of the first encapsulation layer 141 and the third encapsulation layer 143 may include inorganic materials, such as silicon nitride, silicon oxide, silicon oxynitride, etc. Inorganic materials have high density and can prevent the intrusion of water, oxygen, etc. For example, the first encapsulation layer 141 and the third encapsulation layer 143 can be formed by processes such as chemical vapor deposition.

[0063] The material of the second encapsulation layer 142 may include organic materials, such as polymeric materials containing desiccants or polymeric materials that can block moisture, such as polymeric resins. For example, the second encapsulation layer 142 may be formed by processes such as inkjet printing.

[0064] In some embodiments, a touch structure is further provided on the side of the encapsulation layer 14 away from the light-emitting device layer 13. The touch structure may include a first touch metal layer, an inorganic insulating layer, and a second touch metal layer stacked sequentially. The inorganic insulating layer includes silicon nitride, etc. Specifically, the first dimming layer 151 is an organic layer disposed on the side of the second touch metal layer away from the encapsulation layer 14. This organic layer can protect the touch structure to a certain extent and planarize the touch structure. Based on this, a second opening K2 corresponding to the first opening K1 is provided on the first dimming layer 151, and a film layer with a higher refractive index is filled in the second opening K2, thereby utilizing the principle of total internal reflection to improve the light emission efficiency of the display panel at the front viewing angle.

[0065] In some embodiments, the display panel does not include a film layer with a refractive index that meets the requirements for filling the second opening K2. If an additional film layer with a refractive index that meets the requirements is added, such as by printing a high refractive index ink, it will undoubtedly add a process and will not be conducive to reducing the thickness of the display panel. At the same time, it is difficult to avoid ink overflow during the printing of high refractive index ink, and the overflowing ink will occupy a certain part of the bezel, which is not conducive to the narrow bezel of the display panel.

[0066] To address the aforementioned issues, in some embodiments, the third dimming layer 153 is configured as an adhesive layer. Specifically, the adhesive layer fills the second opening K2 of the first dimming layer 151, allowing the functional layers of the display panel 100 to be bonded to the side of the first dimming layer 151 away from the encapsulation layer 14 via the adhesive layer. In other words, configuring the third dimming layer 153 as an adhesive layer does not additionally increase the thickness of the display panel 100. Furthermore, since the adhesive layer is a single sheet, there is no overflow that would obstruct the bezel, which is beneficial for thinning the display panel 100 and achieving a narrow bezel design.

[0067] In some embodiments, the display panel 100 further includes a polarizing functional layer located on the side of the dimming structure layer 15 away from the encapsulation layer 14. The third dimming layer 153 is an adhesive layer bonded to the surface of the polarizing functional layer near the dimming functional layer 15. That is, the third dimming layer 153 is used to directly bond the polarizing functional layer. In actual manufacturing, the third dimming layer 153 is an adhesive layer integrated into the polarizing functional layer. In other words, the third dimming layer 153 does not additionally increase the thickness of the display panel 100, which is beneficial for reducing the thickness of the display panel 100.

[0068] In some embodiments, the third dimming layer 153 is an adhesive layer, and the adhesive layer contains acrylic double bonds and benzene rings. The acrylic double bonds can ensure the adhesion of the third dimming layer 153, while the addition of benzene rings can increase the refractive index of the third dimming layer 153, so that the refractive index of the third dimming layer 153 is greater than the refractive index of the first dimming layer 151. However, the addition of benzene rings also increases the rigidity of the third dimming layer 153 and reduces its deformation capacity, thus affecting its viscosity. Therefore, in order to balance the viscosity and refractive index of the third dimming layer 153, it is difficult to achieve a large difference between the refractive indices of the two layers while ensuring that the refractive index of the third dimming layer 153 is greater than that of the first dimming layer 151. According to the principle of total internal reflection, the greater the difference between the refractive indices of the third dimming layer 153 and the first dimming layer 151, the better it is for improving the light emission efficiency at the positive viewing angle. Therefore, if total internal reflection is achieved only through the cooperation of the first dimming layer 151 and the third dimming layer 153, the improvement in the light emission efficiency at the positive viewing angle of the display panel will be limited.

[0069] It should be noted that in the actual manufacturing process, the first dimming layer 151 is an organic layer located above the touch structure, and this organic layer is completed using the front-end manufacturing process of the display panel; while the third dimming layer 153 is an adhesive layer that directly bonds the functional layers of the display panel, and this adhesive layer is completed in the back-end manufacturing process of the display panel; after the front-end manufacturing process of the display panel is completed, a protective film needs to be attached to the surface of the display panel to protect it and prevent damage during the transfer from the front-end process to the back-end process. After the display panel is transferred to the back-end process, the protective film attached in the front-end process needs to be removed first. This protective film includes the protective film body and a release agent layer located on one side of the protective film body, near the first dimming layer 151; therefore, it is unavoidable that some release agent layer residue remains during the removal of the protective film.

[0070] Based on the above embodiments, the residual release agent layer is used as the second dimming layer 152, and the refractive index of the second dimming layer 152 is set to be less than the refractive index of the first dimming layer 151. At the same time, through process adjustment, it is ensured that the second dimming layer 152 is at least uniformly residual on the sidewall of the second opening K2 of the first dimming layer 151. Then, the interface of total internal reflection will occur at the interface between the third dimming layer 153 and the second dimming layer 152. Since the difference between the refractive index of the third dimming layer 153 and the refractive index of the second dimming layer 152 is greater than the difference between the refractive index of the third dimming layer 153 and the refractive index of the first dimming layer 151, the setting of the second dimming layer 152 can further improve the light emission efficiency of the display panel at the positive viewing angle.

[0071] In some embodiments, the second dimming layer 152 contains at least organic matter, and the organic matter in the second dimming layer 152 is made of a different material than the organic layer corresponding to the first dimming layer 151, so that the refractive index of the second dimming layer 152 is different from the refractive index of the first dimming layer 151.

[0072] Furthermore, by configuring the organic material in the second dimming layer 152 to contain a -NH-COO- chain structure, not only can the requirements for the second dimming layer 152 as a release agent layer be met, but the requirement that the refractive index of the second dimming layer 152 be lower than that of the first dimming layer 151 can also be met. In practical applications, the material of the second dimming layer 152 includes polyurethane. In other embodiments, the second dimming layer 152 can also be made of other materials, as long as the requirements for the second dimming layer 152 as a release agent layer and the refractive index requirement are both met, they are within the scope of this application and are not specifically limited herein.

[0073] In this embodiment, the refractive index of the first dimming layer 151 is set to be greater than that of the second dimming layer 152 and less than that of the third dimming layer 153. This creates a relatively larger difference between the refractive indices of the second and third dimming layers. Consequently, the contact surfaces of the second and third dimming layers 152 and 153 can form a smooth transition interface. When light exits from the light-emitting device and enters the third dimming layer 153 from the bottom of the second opening K2, then strikes this transition interface, total internal reflection easily occurs because the light travels from a material with a high refractive index to a material with a low refractive index. This causes the light originally refracted from the third dimming layer 153 to be reflected back into the normal viewing angle, thereby increasing the brightness at the normal viewing angle and improving the light extraction efficiency. Meanwhile, since the second dimming layer 152 also serves as a release agent layer remaining in the display panel manufacturing process, and the third dimming layer 153 also serves as an adhesive layer for bonding the display panel functional layer, the setting of the second dimming layer 152 and the third dimming layer 153 does not increase the manufacturing process of the display panel while improving the light emission efficiency of the display panel at the forward viewing angle, which is conducive to simplifying the display panel manufacturing process.

[0074] In some embodiments, the third dimming layer 153 contains small molecule polar functional groups that are attracted to polyurethane, thereby improving the bonding degree of the interface between the second dimming layer 152 and the third dimming layer 153 and preventing the bonding degree of the interface between the second dimming layer 152 and the third dimming layer 153 from decreasing after being placed for a period of time.

[0075] In some embodiments, the third dimming layer 153 is susceptible to the influence of ion wind during the process, which can reduce the viscosity of the third dimming layer to some extent. To address this, small molecule polar functional groups that attract polyurethane in the third dimming layer 153 are embedded into the middle of the acrylic double bond chain to reduce the steric hindrance effect of the functional groups and improve the viscosity of the third dimming layer 153 during the process.

[0076] Unlike the embodiments described above, which increase the refractive index of the third dimming layer 153 by adding benzene rings to the structure of the third dimming layer 153, in some embodiments, the third dimming layer 153 is doped with high-refractive-index particles. The refractive index of the third dimming layer 153 is increased by doping it with high-refractive-index particles, but it is still necessary to ensure that the refractive index of the third dimming layer 153 is greater than that of the first dimming layer 151, and to ensure the adhesiveness of the third dimming layer 153 as an adhesive layer.

[0077] In some embodiments, the second opening K2 penetrates the first dimming layer 151, and the area of ​​the second opening K2 away from the driving substrate 11 is larger than the area of ​​the second opening K2 near the driving substrate 11; that is, the second opening K2 has a structure that is larger at one end and smaller at the other. For example, the second opening K2 can be in the shape of an inverted frustum, which can effectively expand the light-emitting area of ​​the corresponding light-emitting device 130. In this case, in the direction from the driving substrate 11 toward the dimming structure layer 15, the sidewall 1501 is an inclined sidewall with the opening facing outwards.

[0078] In some embodiments, such as Figure 3 As shown, the second dimming layer 152 may only cover the sidewall 1501 of the second opening K2.

[0079] With this configuration, a transition interface is formed between the second dimming layer 152 and the third dimming layer 153 at the position of the side wall 1501 of the second opening K2. This can effectively modulate the light rays incident on the side wall 1501 of the second opening K2, so that more of them are reflected into the frontal viewing angle, thereby improving the brightness of the frontal viewing angle.

[0080] In some embodiments, the sidewall 1501 may be curved, such as Figure 3 As shown; and by another example, the sidewall 1501 can also be planar, such as Figure 1 and Figure 2 As shown. Of course, the sidewall 1501 can also be a combination of curved and planar surfaces or other forms, and this disclosure does not limit it.

[0081] In some embodiments, such as Figure 1 As shown, in addition to the sidewall 1501 covering the second opening K2, the second dimming layer 152 also covers the surface of the first dimming layer 151 away from the driving substrate 11.

[0082] With this configuration, when the light emitted by the light-emitting device 130 enters the first dimming layer 151 through the bottom surface of the first dimming layer 151 (i.e., the side surface of the first dimming layer 151 closest to the driving substrate 11) and exits from the top surface of the first dimming layer 151 (i.e., the side surface of the first dimming layer 151 furthest from the driving substrate 11), and then passes through the second dimming layer 152 and reaches the interface between the second dimming layer 152 and the third dimming layer 153, the light travels from a material with a low refractive index to a material with a high refractive index, resulting in more refraction, which is beneficial to improving the light extraction efficiency of the light-emitting device 130.

[0083] In some embodiments, such as Figure 2 As shown, in addition to covering the sidewall 1501 of the second opening K2, the second dimming layer 152 also covers the surface of the encapsulation layer 14 (e.g., the third encapsulation layer 143) at the second opening K2. In practical applications, the side of the encapsulation layer 14 away from the light-emitting device layer 13 is also provided with a touch structure. The touch metal layer in the touch structure is disposed away from the first opening K1. The film layer corresponding to the first opening K1 in the touch structure is an inorganic insulating layer. Therefore, when the second opening K2 penetrates the first dimming layer 151, the bottom wall of the second opening K2 is the inorganic insulating layer in the touch structure. Therefore, the second dimming layer 152 covering the bottom wall of the second opening K2 means that the second dimming layer 152 covers the surface of the aforementioned inorganic insulating layer at the second opening K2.

[0084] With this configuration, the light emitted by the light-emitting device 130 enters the second dimming layer 152 through the bottom of the second opening K2, and then passes through the interface between the second dimming layer 152 and the third dimming layer 153. The light travels from the material with a low refractive index to the material with a high refractive index, resulting in more refraction, which helps to improve the light extraction efficiency of the light-emitting device 130.

[0085] In some embodiments, such as Figure 2 As shown, the second dimming layer 152 is disposed as a single layer, and the second dimming layer 152 simultaneously covers the first dimming layer 151 and the second opening K2. In this way, the second dimming layer 152 can form a continuous layer, which not only ensures that the light-emitting device 130 has good light extraction efficiency and positive viewing angle brightness, but also facilitates the fabrication of the second dimming layer 152.

[0086] In some embodiments, the first dimming layer 151 may have a plurality of second openings K2, and the plurality of second openings K2 correspond one-to-one with a plurality of light-emitting devices 130 in the light-emitting device layer 13.

[0087] In this case, the second dimming layer 152 can completely cover the first dimming layer 151. Corresponding to the position of the second opening in the first dimming layer 151, the second dimming layer 152 covers the corresponding part of the encapsulation layer 14. That is, the first dimming layer 151 and the encapsulation layer 14 can be treated as a whole, and then a whole layer of the second dimming layer 152 is fabricated on top of this whole.

[0088] In some embodiments, the thickness of the second dimming layer 152 is greater than or equal to 10 nm and less than or equal to 100 nm. This setting helps to reduce the overall film thickness of the dimming structure layer 15, thereby helping to reduce the thickness of the display panel 100. In addition, setting the thickness of the dimming structure layer 15 within the above-mentioned range also helps to ensure that the display panel 100 has good brightness at the forward viewing angle.

[0089] Comparative experiments were conducted on the second dimming layer 152 with different thicknesses. Using a thickness of 0 (i.e., no second dimming layer 152) as the baseline, the current efficiency was significantly improved when the thickness of the second dimming layer 152 was set to 30nm, 50nm, and 100nm. However, when the thickness of the second dimming layer 152 was greater than 100nm or less than 10nm, the current efficiency decreased significantly compared to when the thickness of the second dimming layer 152 was set in the range of 10nm to 100nm. Therefore, setting the thickness of the dimming structure layer 15 in the range of 10nm to 100nm can improve the brightness of the display panel 100 at its front viewing angle.

[0090] In some embodiments, the thickness of the second dimming layer 152 is greater than or equal to 30 nm and less than or equal to 60 nm. Within this range, on the one hand, it can avoid the second dimming layer 152 being too thin, making it difficult to ensure a stable transition interface between it and the third dimming layer 153, which would lead to a decrease in brightness at the positive viewing angle; on the other hand, it can also ensure that the dimming structure layer 15 as a whole has a reasonable and relatively small thickness.

[0091] During the experiment, it was also found that setting the thickness of the second dimming layer 152 in the range of 30nm to 60nm resulted in better current efficiency compared to other ranges between 10nm and 100nm (such as the ranges of 10nm to 20nm, 70nm to 80nm, and 80nm to 90nm). Therefore, setting the thickness of the dimming structure layer 15 in the range of 30nm to 60nm can more significantly and effectively improve the brightness of the display panel 100 at the viewing angle.

[0092] In some embodiments, based on the formation of a stable transition interface between the second dimming layer 152 and the third dimming layer 153, setting the thickness of the second dimming layer 152 to close to 100nm is more conducive to its application in actual manufacturing processes.

[0093] In some embodiments, the absolute value of the difference between the refractive index of the first dimming layer 151 and the refractive index of the second dimming layer 152 is less than the absolute value of the difference between the refractive index of the first dimming layer 151 and the refractive index of the third dimming layer 153. It should be noted that the first dimming layer 151 is the organic layer on the side of the touch structure of the display panel 100 away from the encapsulation layer 14, the second dimming layer 152 is the release agent layer remaining after the protective film is removed during the manufacturing process of the display panel 100, and the third dimming layer 153 is the adhesive layer for bonding the functional layers of the display panel 100. Given the functional limitations of the first dimming layer 151, the second dimming layer 152, and the third dimming layer 153 in the display panel 100, the absolute value of the difference between the refractive index of the first dimming layer 151 and the refractive index of the second dimming layer 152 is also limited. Under the above limitations, the absolute value of the difference between the refractive index of the first dimming layer 151 and the refractive index of the second dimming layer 152 is less than the absolute value of the difference between the refractive index of the first dimming layer 151 and the refractive index of the third dimming layer 153. Therefore, while realizing the functions of the first dimming layer 151, the second dimming layer 152, and the third dimming layer 153 in the display panel 100, the refractive index of the second dimming layer 152 and the refractive index of the third dimming layer 153 can have a relatively larger difference, so as to further improve the light emission efficiency of the display panel 100 at the positive viewing angle.

[0094] In some embodiments, the refractive index of the second dimming layer 152 is greater than or equal to 1.4 and less than 1.5, and the refractive index of the third dimming layer 153 is greater than or equal to 1.55 and less than or equal to 1.6.

[0095] In some embodiments, the refractive index of the second dimming layer 152 can be 1.4, 1.45, 1.5, etc.; the refractive index of the third dimming layer 153 can be 1.55, 1.56, 1.57, 1.58, 1.59, 1.6, etc.

[0096] This configuration allows for a significant difference in refractive index between the second dimming layer 152 and the third dimming layer 153, thus satisfying the requirement for improved brightness at the positive viewing angle while also facilitating the fabrication of the second dimming layer 152 and the third dimming layer 153.

[0097] Furthermore, when the refractive index of the third dimming layer 153 is in the range of 1.55 to 1.6, the third dimming layer 153 can maintain good adhesion, thereby maintaining the overall good stability of the display panel 100, while also having strong deformation capability, which is beneficial to realizing the bending of the display panel 100.

[0098] In some embodiments, the third dimming layer 153 is an adhesive layer, which can be used to bond components located on the side of the second dimming layer 152 away from the driving substrate 11, such as polarizers. This helps to reduce the number of film layers, simplify the manufacturing process of the display panel 100, and also facilitates the achievement of narrow bezels and bending of the display panel 100.

[0099] In some embodiments, the third dimming layer 153 may be an organic adhesive. The third dimming layer 153 may contain materials such as acrylate or polymethyl methacrylate.

[0100] In some embodiments, the refractive index of the second dimming layer 152 is greater than or equal to 1.45 and less than or equal to 1.48. For example, the refractive index of the second dimming layer 152 may be 1.45, 1.46, 1.47, 1.48, etc.

[0101] Limiting the refractive index of the second dimming layer 152 to this range ensures that the transition interface between the second dimming layer 152 and the third dimming layer 153 can effectively improve the brightness of the display panel 100 at the viewing angle. It also helps in the production of the second dimming layer 152.

[0102] In some embodiments, the second dimming layer 152 includes at least one of a fluorinated organic compound and an organosilicon. The fluorinated organic compound and the organosilicon have relatively low refractive indices, which makes the overall refractive index of the second dimming layer 152 lower than that of the third dimming layer 153, thereby enabling light rays incident from the third dimming layer 153 onto the sidewall to be effectively reflected, thereby improving light energy utilization and increasing the brightness at the positive viewing angle.

[0103] In some embodiments, the fluorinated organic compound may be a fluorinated release agent.

[0104] In some embodiments, the second dimming layer 152 may further comprise a resin, wherein the fluorinated organic compound or organosilicon may be distributed on the resin surface as a release agent. For example, the fluorinated organic compound or organosilicon may be uniformly distributed on the resin surface.

[0105] After the encapsulation layer 14 in the display panel 100 is fabricated on the light-emitting device layer 13, a first dimming layer 151 is fabricated on the encapsulation layer 14. Then, a protective film is adhered on the first dimming layer 151. This protective film includes a protective film body and a release agent layer located on one side of the protective film body, near the first dimming layer 151. Then, the protective film can be pressed towards the first dimming layer 151 through processes such as debubbling treatment. After that, the protective film body is peeled off, and the remaining release agent layer serves as the second dimming layer 152.

[0106] Using this method, the manufacturing process of the second dimming layer 152 is very simple, avoiding the need for vapor deposition or sputtering processes when preparing nano or submicron level films in the display panel, thereby reducing the above-mentioned process steps and improving the production efficiency of the display panel 100.

[0107] In some embodiments, when the second dimming layer 152 comprises a fluorinated organic compound, the atomic percentage of fluorine atoms in the second dimming layer 152 is greater than 0 and less than 10%. That is, the atomic percentage of fluorine atoms is less than 10% relative to all other elements in the second dimming layer 152.

[0108] Within this atomic ratio range, the content of fluorinated organic matter is relatively reasonable. On the one hand, it can ensure that the refractive index of the second dimming layer 152 is within the above range, and on the other hand, it is also conducive to ensuring the smooth removal of the release film.

[0109] In some embodiments, the atomic percentage of fluorine atoms in the second dimming layer 152 is greater than 0 and less than 5%.

[0110] Experimental tests revealed that when the atomic ratio is within this range, the refractive index of the second dimming layer 152 can be guaranteed to be in the range of 1.45-1.48, while also enabling the display panel to have good light energy utilization and positive viewing angle brightness.

[0111] In some embodiments, when the second dimming layer 152 comprises organosilicon, the atomic percentage of silicon atoms in the second dimming layer 152 is greater than 0 and less than 10%.

[0112] Within this atomic ratio range, the content of organosilicon is reasonable. On the one hand, it can ensure that the refractive index of the second dimming layer 152 is within the above range, and on the other hand, it is also conducive to ensuring the smooth removal of the release film.

[0113] In some embodiments, the proportion of silicon atoms in the second dimming layer 152 is greater than 0 and less than 5%.

[0114] Experimental tests revealed that when the atomic ratio is within this range, the refractive index of the second dimming layer 152 can be guaranteed to be in the range of 1.45-1.48, while also enabling the display panel to have good light energy utilization and positive viewing angle brightness.

[0115] In some embodiments, the refractive index of the first dimming layer 151 is greater than or equal to 1.5 and less than or equal to 1.53. The first dimming layer 151 is mainly used to define the second opening K2 and provide a sidewall 1501 so that the second dimming layer 152 can be well and stably attached to the sidewall 1501.

[0116] In some embodiments, the first dimming layer 151 may be made using a transparent optical adhesive.

[0117] In practical applications, due to deviations between the actual manufacturing process and the design values, the refractive index of the first dimming layer 151 is close to 1.52, the refractive index of the second dimming layer 152 is close to 1.5, and the refractive index of the third dimming layer 153 is close to 1.6. Thus, the refractive index of the first dimming layer 151 is greater than that of the second dimming layer 152 and less than that of the third dimming layer 153. Furthermore, the absolute value of the difference between the refractive indices of the first and third dimming layers 151 is less than the absolute value of the difference between the refractive indices of the second and third dimming layers 152. In other words, the refractive index of the second and third dimming layers 152 has a relatively larger difference, thereby maximizing the light emission efficiency of the display panel 100 at the positive viewing angle.

[0118] In some embodiments, the orthographic projection of the bottom of the second opening K2 on the driving substrate 11 at least partially overlaps with the orthographic projection of the light-emitting device 130 corresponding to the second opening K2 on the driving substrate 11, so that at least a portion of the light emitted by the light-emitting device 130 can reach the sidewall of the second opening K2, so that total internal reflection is formed at the interface between the third dimming layer 153 and the second dimming layer 152 at the sidewall of the second opening K2, thereby improving the light emission efficiency of the display panel at the front viewing angle.

[0119] In some embodiments, the orthographic projection of the bottom of the second opening K2 on the driving substrate 11 completely overlaps with the orthographic projection of the light-emitting device 130 corresponding to the second opening K2 on the driving substrate 11.

[0120] This configuration ensures that a significant amount of light emitted from the light-emitting device 130 enters the second opening K2 and exits through it. By adjusting the transition interface on the inner wall of the second opening K2, the brightness at the forward viewing angle can be effectively improved, thereby enhancing the light extraction efficiency of the light-emitting device 130.

[0121] In some embodiments, the orthographic projection of the bottom of the second opening K2 on the driving substrate 11 covers the orthographic projection of the light-emitting device 130 corresponding to the second opening K2 on the driving substrate 11.

[0122] This configuration increases the proportion of light emitted by the light-emitting device 130 that enters the second opening K2, thereby significantly improving the brightness at the positive viewing angle and thus enhancing the light extraction efficiency of the light-emitting device 130.

[0123] The following experiments were conducted on the display panel 100 provided in the above embodiments. The display panel 100 without the second dimming layer 152 was used as experimental sample 1, and the display panel 100 with the second dimming layer 152 was used as experimental sample 2. Under the same experimental conditions, the following three sets of data were measured. The positive viewing angle brightness of experimental sample 2 compared to experimental sample 1 increased by 5.08%, 6.36%, and 6.69%, respectively. Therefore, the average positive viewing angle brightness increase of experimental sample 2 compared to experimental sample 1 can reach 6.04%. Thus, the display panel 100 provided in this embodiment has a positive viewing angle brightness increase of at least 5%, which provides a significant benefit to the use of the display panel 100.

[0124] Some embodiments of this disclosure also provide a display device, which includes the display panel 100 described in any of the above embodiments.

[0125] Since it includes a display panel, the display device has all the technical effects of the aforementioned display panel 100, which will not be described in detail here.

[0126] This disclosure also provides a method for manufacturing a display panel 100 in some embodiments, such as... Figure 4 As shown, the method includes the following steps.

[0127] S10, Provide a driving substrate 11.

[0128] S20. A pixel definition layer 12 and a light-emitting device layer 13 are fabricated on the driving substrate 11. The pixel definition layer 12 has a plurality of first openings K1, and the light-emitting device layer 13 includes a plurality of light-emitting devices 130, each of which is located in a first opening K1.

[0129] S30. An encapsulation layer 14 is formed on the side of the light-emitting device layer 13 away from the driving substrate 11.

[0130] S40. A dimming structure layer 15 is formed on the side of the encapsulation layer 14 away from the driving substrate 11. The dimming structure layer 15 includes a first dimming layer 151, a second dimming layer 152, and a third dimming layer 153 arranged sequentially in a direction away from the driving substrate 11. The first dimming layer 151 has a second opening K2 corresponding to the first opening K1. The second dimming layer 152 at least covers the sidewall 1501 of the second opening K2. The third dimming layer 153 at least fills the second opening K2. The refractive index of the first dimming layer 151 is greater than the refractive index of the second dimming layer 152, and the refractive index of the first dimming layer 151 is less than the refractive index of the third dimming layer 153.

[0131] With the above settings, when light is emitted from the light-emitting device 130 and then enters the third dimming layer 153 from the bottom of the second opening K2 and is directed towards the transition interface between the second dimming layer 152 and the third dimming layer 153, total internal reflection is easily generated because the light is directed from a material with a high refractive index to a material with a low refractive index. This causes the light originally refracted from the third dimming layer 153 to be reflected into the positive viewing angle, thereby improving the brightness of the positive viewing angle and improving the light emission efficiency.

[0132] In some embodiments, such as Figure 5 As shown, in step S40, a dimming structure layer 15 is formed on the side of the encapsulation layer 14 away from the driving substrate 11, including the following steps.

[0133] S401. A first dimming layer 151 is formed on the side of the encapsulation layer 14 away from the driving substrate 11.

[0134] S402. A protective film is pasted onto the first dimming layer 151 and defoaming is performed; wherein, the protective film includes a protective film body and a release agent layer located on the side of the protective film body near the first dimming layer 151.

[0135] S403. Remove the protective film body, and the release agent layer forms the second dimming layer 152.

[0136] S404. A third dimming layer 153 is fabricated on the side of the second dimming layer 152 away from the first dimming layer 151.

[0137] Using the above method, the manufacturing process of the second dimming layer 152 is very simple. This avoids the need for vapor deposition or sputtering processes when preparing nano or submicron level films in the display panel 100, thereby reducing the above process steps and improving the production efficiency of the display panel 100.

[0138] It should be noted that in order to achieve uniform residue of the second dimming layer 152 on the surface of the first dimming layer 151 away from the driving substrate 11 and / or on the surface of the second opening K2, the above-mentioned debubbling process must be performed. If the debubbling process of the above-mentioned protective film is omitted in the process, it is difficult to ensure the uniformity of the second dimming layer 152, which may result in no residue of the second dimming layer 152 on the sidewall of the second opening K2, thus making it impossible to improve the light emission efficiency of the display panel at the front viewing angle through total internal reflection.

[0139] The invention titles provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display panel, characterized in that, include: Drive substrate; A pixel definition layer and a light-emitting device layer are disposed on the driving substrate. The pixel definition layer has a plurality of first openings, and the light-emitting device layer includes a plurality of light-emitting devices, each of which is located in a first opening. The encapsulation layer is located on the side of the light-emitting device layer away from the driving substrate; A dimming structure layer is located on the side of the encapsulation layer away from the driving substrate. The dimming structure layer includes a first dimming layer, a second dimming layer, and a third dimming layer arranged sequentially in a direction away from the driving substrate. The first dimming layer has a second opening corresponding to the first opening. The second dimming layer at least covers the sidewall of the second opening. The third dimming layer at least fills the second opening. Wherein, the refractive index of the first dimming layer is greater than that of the second dimming layer, and the refractive index of the first dimming layer is less than that of the third dimming layer. The first dimming layer is an organic layer, and the second dimming layer contains at least organic matter. The organic matter in the first dimming layer and the organic layer in the second dimming layer are made of different materials. The organic matter in the second dimming layer contains a -NH-COO- chain structure.

2. The display panel according to claim 1, characterized in that, The material of the second dimming layer includes polyurethane.

3. The display panel according to claim 1 or 2, characterized in that, The third dimming layer is an adhesive layer.

4. The display panel according to claim 3, characterized in that, The display panel further includes a polarizing functional layer, which is located on the side of the dimming structure layer away from the encapsulation layer, and the adhesive layer is bonded to the surface of the polarizing functional layer near the dimming functional layer.

5. The display panel according to claim 3, characterized in that, The third dimming layer contains acrylic double bonds and benzene rings.

6. The display panel according to claim 3, characterized in that, The third dimming layer is doped with high-refractive-index particles.

7. The display panel according to claim 3, characterized in that, The third dimming layer contains small molecule polar functional groups that are attracted to polyurethane.

8. The display panel according to claim 1 or 2, characterized in that, The absolute value of the difference between the refractive index of the first dimming layer and the refractive index of the second dimming layer is less than the absolute value of the difference between the refractive index of the first dimming layer and the refractive index of the third dimming layer.

9. The display panel according to claim 8, characterized in that, The refractive index of the first dimming layer is greater than or equal to 1.5 and less than or equal to 1.53, the refractive index of the second dimming layer is greater than or equal to 1.4 and less than or equal to 1.5, and the refractive index of the third dimming layer is greater than or equal to 1.55 and less than or equal to 1.

6.

10. The display panel according to claim 9, characterized in that, The refractive index of the first dimming layer is 1.52, the refractive index of the second dimming layer is 1.5, and the refractive index of the third dimming layer is 1.

6.

11. The display panel according to claim 1 or 2, characterized in that, The thickness of the second dimming layer is greater than or equal to 10 nm and less than or equal to 100 nm.

12. The display panel according to claim 1 or 2, characterized in that, The second dimming layer is disposed as a whole, and the second dimming layer covers the first dimming layer and the second opening.

13. The display panel according to claim 1 or 2, characterized in that, The orthographic projection of the bottom of the second opening on the driving substrate at least partially overlaps with the orthographic projection of the light-emitting device on the driving substrate.

14. The display panel according to claim 13, characterized in that, The orthographic projection of the bottom of the second opening on the driving substrate covers the orthographic projection of the light-emitting device on the driving substrate, or the orthographic projection of the bottom of the second opening on the driving substrate completely overlaps with the orthographic projection of the light-emitting device on the driving substrate.

15. The display panel according to claim 1 or 2, characterized in that, The second opening penetrates the first dimming layer, and the area of ​​the second opening on the side away from the driving substrate is larger than the area of ​​the second opening on the side closer to the driving substrate.

16. A display device, characterized in that, Includes the display panel as claimed in any one of claims 1 to 15.

17. A method for manufacturing a display panel, characterized in that, include: Provide driving substrate; A pixel definition layer and a light-emitting device layer are fabricated on the driving substrate. The pixel definition layer has a plurality of first openings, and the light-emitting device layer includes a plurality of light-emitting devices, each of which is located in a first opening. An encapsulation layer is formed on the side of the light-emitting device layer away from the driving substrate; A dimming structure layer is formed on the side of the encapsulation layer away from the driving substrate. The dimming structure layer includes a first dimming layer, a second dimming layer, and a third dimming layer sequentially disposed along a direction away from the driving substrate. The first dimming layer has a second opening corresponding to the first opening. The second dimming layer at least covers the sidewall of the second opening, and the third dimming layer at least fills the opening. The refractive index of the first dimming layer is greater than that of the second dimming layer, and the refractive index of the first dimming layer is less than that of the third dimming layer. The first dimming layer is an organic layer, and the second dimming layer contains at least an organic material. The organic material of the first dimming layer and the organic layer of the second dimming layer are made of different materials, and the organic material of the second dimming layer contains an -NH-COO- chain structure.

18. The method for manufacturing a display panel according to claim 17, characterized in that, A dimming structure layer is formed on the side of the encapsulation layer away from the driving substrate, including: A first dimming layer is formed on the side of the encapsulation layer away from the driving substrate, and a second opening is formed on the first dimming layer; A protective film is adhered to the first dimming layer and defoamed; wherein, the protective film includes a protective film body and a release agent layer located on the side of the protective film body close to the first dimming layer; Peeling off the protective film body reveals that the release agent layer forms a second dimming layer, such that the second dimming layer at least covers the sidewall of the second opening; and The third dimming layer is fabricated on the side of the second dimming layer away from the first dimming layer.

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