Display panel and manufacturing method therefor, and display apparatus

Abstract

A display panel, comprising a pixel definition layer, a light-emitting device layer and a dimming structure layer. The pixel definition layer has a plurality of first openings. The light-emitting device layer comprises a plurality of light-emitting devices. The dimming structure layer comprises a first dimming layer, a second dimming layer and a third dimming layer, which are sequentially disposed in a direction away from a driving substrate, wherein the first dimming layer has second openings corresponding to the first openings, the second dimming layer at least covers a side wall of the first dimming layer that is located inside the second openings, and the third dimming layer at least fills the second openings; and the refractive index of the first dimming layer is greater than the refractive index of the second dimming layer and is less than the refractive index of the third dimming layer.

Description

Display panel, manufacturing method thereof, and display device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202410103694.5 filed on January 24, 2024, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art

[0004] Compared to liquid crystal display (LCD) panels, organic light-emitting diode (OLED) display panels offer the advantages of self-luminescence, thinness, high contrast, wide viewing angles, and vibrant colors. Furthermore, OLED display panels are typically much thinner than LCD panels and can be manufactured in a variety of display configurations, including bendable, curved, and curled displays. Therefore, they are widely used in wearable devices.

[0005] In the related art, the light-emitting devices in the OLED display panel usually have problems such as a large light emission angle, resulting in low brightness of the OLED display panel at a straight viewing angle. SUMMARY OF THE INVENTION

[0006] Embodiments of the present application provide a display panel, a manufacturing method thereof, and a display device, aiming to improve the problem of low brightness of the display panel at a normal viewing angle in the related art.

[0007] An embodiment of the present application provides a display panel, comprising: 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 arranged on the driving substrate, the pixel definition layer has a plurality of first openings, the light-emitting device layer includes a plurality of light-emitting devices, and each light-emitting device 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; 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 arranged in sequence 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 first dimming layer located in 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.

[0008] An embodiment of the present application also provides a display device, which includes a display panel, which includes: 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 arranged on the driving substrate, the pixel definition layer has a plurality of first openings, the light-emitting device layer includes a plurality of light-emitting devices, and each light-emitting device 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; 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 arranged in sequence 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 first dimming layer located in 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.

[0009] An embodiment of the present application also provides a method for manufacturing a display panel, which includes: providing a driving substrate; manufacturing a pixel definition layer and a light-emitting device layer on the driving substrate, the pixel definition layer having multiple first openings, the light-emitting device layer including multiple light-emitting devices, and each light-emitting device is located in a first opening; manufacturing an encapsulation layer on a side of the light-emitting device layer away from the driving substrate; and manufacturing a dimming structure layer on a 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 arranged in sequence 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 side wall of the second opening, and the third dimming layer at least fills 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. Beneficial effects

[0010] For the display panel provided in the embodiments of the present application, by setting the refractive index of the first dimming layer to be greater than the refractive index of the second dimming layer and less than the refractive index of the third dimming layer, a relatively larger difference is created between the refractive index of the second dimming layer and the refractive index of the third dimming layer, thereby enabling the contact surface of the second dimming layer and the third dimming layer to form a good transition interface. When light is emitted from the light-emitting device, then enters the third dimming layer from the bottom of the second opening and is emitted toward the transition interface, total internal reflection is easily generated because the light is emitted from the material with a high refractive index to the material with a low refractive index, causing the light originally refracted from the third dimming layer to be reflected into the normal viewing angle, thereby improving the brightness at the normal viewing angle and achieving improved light extraction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG1 is a cross-sectional view of a display panel provided in some embodiments of the present application;

[0012] FIG2 is a cross-sectional view of a display panel provided in some other embodiments of the present application;

[0013] FIG3 is a cross-sectional view of a display panel provided in some other embodiments of the present application;

[0014] FIG4 is a flow chart of a method for manufacturing a display panel provided in some embodiments of the present application;

[0015] FIG5 is a flow chart of a method for manufacturing a display panel provided in some other embodiments of the present application. Modes for Carrying Out the Invention

[0016] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The described technical solutions are only used to explain and illustrate the ideas of the present application and should not be regarded as limiting the scope of protection of the present application.

[0017] In the description of this application, it should be understood that the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are simply used to distinguish different technical features. The term "plurality" and similar words mean two or more, unless otherwise expressly limited.

[0018] The use of "configured to" in this application is intended to be open and inclusive language, and does not exclude devices that are adapted or configured to perform additional tasks or steps. In addition, the use of "based on" is intended to be open and inclusive, as a process, step, calculation, or other action that is "based on" one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0019] In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is provided to enable any person skilled in the art to make and use the present application.

[0020] The various embodiments of the present application are similar, and features in different embodiments and / or different examples may be combined with each other.

[0021] In the related art, OLED display panels often have problems such as a large light emission angle of the light-emitting device, resulting in low brightness of the OLED display panel at a straight viewing angle.

[0022] Based on this, some embodiments of the present application provide a display panel, as shown in Figures 1-3, 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.

[0023] The pixel definition layer 12 has a plurality of first openings K1. The light-emitting device layer 13 includes a plurality of light-emitting devices 130 located on the drive substrate 11, with each light-emitting device 130 located within a first opening K1. In other words, the number of first openings K1 is the same as the number of light-emitting devices 130, and they correspond one-to-one. The encapsulation layer 14 is located on the side of the light-emitting device layer 13 away from the drive substrate 11 and covers the light-emitting devices 130.

[0024] 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, which are arranged in sequence along 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 first dimming layer 151 located within the second opening K2. The third dimming layer 153 at least fills the second opening K2.

[0025] 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. As a result, there is a relatively large difference between the refractive indices of the second dimming layer 152 and the third dimming layer 153. This allows the interface between the second dimming layer 152 and the third dimming layer 153 to form a good transition interface, which is arranged at least on the sidewall of the second opening K2.

[0026] As shown in Figure 1, when light is emitted from the light-emitting device 130, then enters the third dimming layer 153 from the bottom of the second opening K2 and is emitted toward the transition interface, since the light is emitted from the material with a high refractive index to the material with a low refractive index, total reflection is easily generated, so that the light originally refracted from the third dimming layer 153 is reflected into the positive viewing angle, thereby increasing the brightness at the positive viewing angle and achieving an improvement in light extraction efficiency.

[0027] Therefore, the display panel 100 provided in the embodiment of the present application can effectively modulate light, and converge light originally diverging at a wide viewing angle into a normal viewing angle, thereby improving the brightness at the normal viewing angle and achieving the purpose of improving light extraction efficiency.

[0028] 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 may drive the light emitting devices 130 in the light emitting device layer 13 , thereby enabling the light emitting devices 130 to emit light.

[0029] For example, the substrate 111 may be a rigid substrate, the material of which may include glass, quartz, or plastic.

[0030] For example, the substrate 111 may be a flexible substrate. The material of the flexible substrate may include PET (Polyethylene terephthalate), PEN (Polyethylenenaphthalate two formic acid glycol ester), or PI (Polyimide).

[0031] In some examples, the driver circuit layer 112 may include multiple pixel driver circuits, which are electrically connected to the light-emitting devices. Various electrical connections can be made between the two, and the specific configuration can be selected based on actual needs. This is not limited in the embodiments of the present application.

[0032] For example, the pixel driving circuits and the light emitting devices 130 may be electrically connected in a one-to-one correspondence. For another example, one pixel driving circuit may be electrically connected to multiple light emitting devices 130. For another example, multiple pixel driving circuits may be electrically connected to one light emitting device 130.

[0033] For example, a plurality of light emitting devices 130 may be arranged in an array, and a plurality of pixel driving circuits may also be arranged in an array, thereby facilitating corresponding connection between the two.

[0034] In the embodiment of the present application, the structure of the display panel 100 is schematically illustrated by taking the corresponding electrical connection between one pixel driving circuit and one light-emitting device 130 as an example.

[0035] In some examples, as shown in FIG. 1-3 , the light emitting device 130 includes an anode 131 located on a driving substrate 11 , and a light emitting functional layer 132 and a cathode 133 located on the anode 131 and stacked in sequence.

[0036] The anodes 131 of the plurality of light emitting devices 130 are independently arranged, and there is a gap between any two adjacent anodes 131. For example, the plurality of anodes 131 may be arranged in an array.

[0037] The cathodes 133 of the plurality of light emitting devices 130 are connected to each other to form a cathode layer. For example, the cathode layer can be manufactured by a full-surface evaporation process. Thus, the encapsulation layer 14 is disposed on the side of the cathode layer away from the drive substrate 11.

[0038] The light-emitting functional layer 132 includes an emission layer (EML), which is used to emit light. The emission layers of the multiple light-emitting devices 130 can be independently arranged, with 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.

[0039] In some examples, 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 provided as an integral layer, for example.

[0040] In some examples, the anode 131 is electrically connected to the pixel driving circuit in a one-to-one correspondence to receive a drive signal from the pixel driving circuit, while the cathode 133 receives a reference voltage signal ELVSS. The light-emitting layer in the light-emitting functional layer 132 emits light under the combined action of the drive signal and the reference voltage signal ELVSS. The multiple light-emitting devices 130 cooperate with each other to realize the image display of the display panel 100.

[0041] Exemplarily, the light-emitting device 130 may 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 translucent or semi-translucent electrode. For example, materials for the cathode 133 include, but are not limited to, magnesium (Mg), silver (Ag), aluminum (Al), magnesium-silver alloys, indium tin oxide (ITO), and the like.

[0042] The encapsulation layer 14 located on the light emitting device 130 may be used to prevent the light emitting device 130 from being oxidized or damaged due to moisture, oxygen or impurities introduced from the outside.

[0043] The encapsulation layer 14 may include a first encapsulation layer 141 , a second encapsulation layer 142 , and a third encapsulation layer 143 , which are sequentially stacked on the light emitting device layer 13 .

[0044] The first encapsulation layer 141 and the third encapsulation layer 143 may be made of an inorganic material, such as silicon nitride, silicon oxide, or silicon oxynitride. 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 may be formed by a process such as chemical vapor deposition.

[0045] The second encapsulation layer 142 may be made of an organic material, such as a polymer material containing a desiccant or a polymer material capable of blocking moisture, such as a polymer resin, etc. For example, the second encapsulation layer 142 may be formed by a process such as inkjet printing.

[0046] In some embodiments, the area of ​​the second opening K2 farther from the driver substrate 11 is larger than the area of ​​the second opening K2 closer to the driver substrate 11, that is, the second opening K2 has a structure with one end larger and the other smaller. For example, the second opening K2 can be in the shape of an inverted frustum, which effectively expands the light-emitting area of ​​the corresponding light-emitting device 130. In this case, in the direction from the driver substrate 11 toward the dimming structure layer 15, the sidewall 1501 is an outwardly inclined sidewall.

[0047] In some embodiments, as shown in FIG. 3 , the second dimming layer 152 may only cover the sidewall 1501 of the first dimming layer 151 located within the second opening K2 .

[0048] With this arrangement, 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 corresponding to the second opening K2, so that the light directed toward the side wall 1501 corresponding to the second opening K2 can be effectively modulated, so that more of the light is reflected into the normal viewing angle, thereby improving the brightness at the normal viewing angle.

[0049] In some examples, the sidewall 1501 may include at least one of a curved surface and a flat surface.

[0050] For example, the sidewall 1501 may include a curved surface, as shown in FIG3 ; another example, the sidewall 1501 may include a flat surface, as shown in FIG1 and FIG2 . Of course, the sidewall 1501 may also be a combination of a curved surface and a flat surface or other forms, which are not limited in the embodiments of the present application.

[0051] In some embodiments, as shown in FIG1 , the second dimming layer 152 covers the surface of the first dimming layer 151 away from the driving substrate 11. In this case, in addition to covering the sidewall 1501 of the first dimming layer 151 located within the second opening K2, the second dimming layer 152 also covers the surface of the first dimming layer 151 located outside the second opening K2.

[0052] With this arrangement, 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 close to the driving substrate 11) and is emitted from the top surface of the first dimming layer 151 (i.e., the side surface of the first dimming layer 151 away 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 is emitted from the material with a low refractive index to the material with a high refractive index, and more refraction can occur, which is beneficial to improving the light extraction efficiency of the light-emitting device 130.

[0053] In some embodiments, as shown in FIG. 2 , the second dimming layer 152 covers the sidewall 1501 of the first dimming layer 151 located at the second opening K2 and the bottom of the second opening K2 .

[0054] With this arrangement, the light emitted by the light-emitting device 130 passes through the bottom of the second opening K2 and enters the second dimming layer 152. Then, when passing through the interface between the second dimming layer 152 and the third dimming layer 153, it is emitted from the material with a low refractive index to the material with a high refractive index, which can cause more refraction, thereby facilitating the improvement of the light extraction efficiency of the light-emitting device 130.

[0055] It is worth noting that the second dimming layer 152 covering the bottom of the second opening K2 means that there is a film layer directly in contact with the dimming structure layer 15 below, and the portion of the film layer exposed by the second opening K2 is covered by the second dimming layer 152 .

[0056] In some embodiments, as shown in FIG2 , the second dimming layer 152 covers both the surface of the first dimming layer 151 away from the drive substrate 11 (including the sidewall 1501 of the first dimming layer 151 located within the second opening K2 and the surface located outside the second opening K2) and the bottom of the second opening K2. In this case, the second dimming layer 152 is provided as a single layer. The second dimming layer 152 can form a continuous layer, which ensures good light extraction efficiency and brightness at normal viewing angles for the light-emitting device 130 while also facilitating the fabrication of the second dimming layer 152.

[0057] In some examples, the first dimming layer 151 may have a plurality of second openings K2 , and the plurality of second openings K2 correspond one-to-one to the plurality of light emitting devices 130 in the light emitting device layer 13 .

[0058] 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, and the second dimming layer 152 covers the corresponding position of the encapsulation layer 14. In other words, the first dimming layer 151 and the encapsulation layer 14 can be formed as a whole, and then a whole second dimming layer 152 is formed on top of the whole.

[0059] 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 configuration can, on the one hand, prevent the second dimming layer 152 from being too thin, making it difficult to form a stable transition interface between it and the third dimming layer 153, resulting in reduced brightness at normal viewing angles. On the other hand, it can also prevent the second dimming layer 152 from being too thick, which could adversely affect the brightness at normal viewing angles of the display panel 100. It can also avoid the problem of the second dimming layer 152 being too thick, which could increase the overall thickness of the display panel 100. Therefore, setting the thickness of the dimming structure layer 15 within the above range can also help ensure that the display panel 100 has good brightness at normal viewing angles.

[0060] The inventors conducted comparative experiments on second dimming layers 152 of varying thicknesses. Using a second dimming layer 152 thickness of zero (i.e., no second dimming layer 152) as a comparison basis, 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 was significantly reduced compared to when the thickness of the second dimming layer 152 was set between 10nm and 100nm. Therefore, setting the thickness of the dimming structure layer 15 within the range of 10nm to 100nm can improve the brightness of the display panel 100 at normal viewing angles.

[0061] 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, it can ensure that the dimming structure layer 15 has a reasonable and relatively small thickness as a whole, while ensuring that the display panel 100 has good brightness at a normal viewing angle.

[0062] During the experiment, the inventors also found that when the thickness of the second dimming layer 152 is set in the range of 30nm to 60nm, its current efficiency is relatively better than other ranges between 10nm and 100nm (for example, the range of 10nm to 20nm, the range of 70nm to 80nm, and the range of 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 a normal viewing angle.

[0063] 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.

[0064] For example, the refractive index of the second dimming layer 152 may be 1.4, 1.45, 1.5, etc.; the refractive index of the third dimming layer 153 may be 1.55, 1.56, 1.57, 1.58, 1.59, 1.6, etc.

[0065] Such a configuration can result in a larger refractive index difference between the second dimming layer 152 and the third dimming layer 153 , thereby meeting the requirement for improving the brightness at a normal viewing angle on the one hand, and facilitating the production of the second dimming layer 152 and the third dimming layer 153 on the other hand.

[0066] In addition, 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 viscosity, thereby maintaining the overall good stability of the display panel 100, and at the same time has strong deformation ability, which is conducive to achieving the bending of the display panel 100.

[0067] Exemplarily, the third dimming layer 153 includes an adhesive layer. The side of the adhesive layer facing away from the drive substrate 11 can be used to bond optical components such as polarizers. This configuration allows the third dimming layer 153 to function as an adhesive, allowing optical components such as polarizers to be directly bonded to the second dimming layer 152, thereby avoiding the additional adhesive required to bond the polarizers and increase thickness. This not only simplifies the manufacturing process of the display panel 100 but also facilitates achieving a narrow bezel and flexible design for the display panel 100.

[0068] Exemplarily, the material of the adhesive layer includes an organic adhesive, such as acrylate or polymethyl methacrylate.

[0069] In some examples, 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 can be 1.45, 1.46, 1.47, 1.48, etc.

[0070] Limiting the refractive index of the second dimming layer 152 within this range can, on the one hand, ensure 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 a normal viewing angle, and on the other hand, it also facilitates the production of the second dimming layer 152.

[0071] In some embodiments, the second dimming layer 152 includes at least one of a fluorine-containing organic compound and an organosilicon. Fluorine-containing organic compounds and organosilicon have relatively low refractive indices, which can make the overall refractive index of the second dimming layer 152 lower than that of the third dimming layer 153. This effectively reflects light emitted from the third dimming layer 153 toward the sidewalls, thereby improving light energy utilization and increasing brightness at normal viewing angles.

[0072] For example, the fluorine-containing organic compound may be a fluorine release agent.

[0073] For example, the second dimming layer 152 may further include resin, and the fluorine-containing organic compound or organic silicon may be distributed on the surface of the resin as a release agent. For example, the fluorine-containing organic compound or organic silicon may be evenly distributed on the surface of the resin.

[0074] After the encapsulation layer 14 in the display panel 100 is formed on the light-emitting device layer 13, the first dimming layer 151 is formed on the encapsulation layer 14. A protective film is then attached to the first dimming layer 151. The protective film includes a protective film body and a release agent layer located on one side of the protective film body. The release agent layer is located on the side of the protective film body close to the first dimming layer 151. The protective film is then squeezed toward the first dimming layer 151 through a process such as degassing, and the protective film body is then removed. The remaining release agent layer serves as the second dimming layer 152.

[0075] In this way, 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 film layers in the display panel, thereby reducing the above-mentioned process steps and improving the production efficiency of the display panel 100.

[0076] In some embodiments, when the second dimming layer 152 includes a fluorine-containing organic compound, the atomic ratio of fluorine atoms in the second dimming layer 152 is greater than 0 and less than 10%. In other words, the atomic ratio of fluorine atoms relative to all other elements in the second dimming layer 152 is less than 10%.

[0077] Within this atomic ratio range, the content of the fluorine-containing organic compound 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.

[0078] In some examples, the atomic ratio of fluorine atoms in the second light-adjusting layer 152 is greater than 0 and less than 5%.

[0079] After many experiments and tests, the inventors found 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 numerical range of 1.45-1.48, while the display panel has better light energy utilization and brightness at normal viewing angles.

[0080] In some embodiments, when the second dimming layer 152 includes organic silicon, the atomic ratio of silicon atoms in the second dimming layer 152 is greater than 0 and less than 10%.

[0081] Within this atomic ratio range, the content of organic silicon 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.

[0082] In some examples, the atomic ratio of silicon atoms in the second dimming layer 152 is greater than 0 and less than 5%.

[0083] After many experiments and tests, the inventors found 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 numerical range of 1.45-1.48, while the display panel has better light energy utilization and brightness at normal viewing angles.

[0084] 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.

[0085] Exemplarily, the first dimming layer 151 may be made of transparent optical adhesive.

[0086] 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 .

[0087] This arrangement ensures that more light emitted from the light emitting device 130 can enter the second opening K2 and exit through the second opening K2. By adjusting the transition interface on the inner sidewall of the second opening K2, the brightness at a normal viewing angle can be effectively improved, thereby improving the light extraction efficiency of the light emitting device 130.

[0088] 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 .

[0089] This configuration can increase the proportion of light emitted by the light emitting device 130 entering the second opening K2 , thereby greatly improving the brightness at a normal viewing angle, thereby improving the light extraction efficiency of the light emitting device 130 .

[0090] For the display panel 100 provided in the above embodiment, the inventor conducted the following experimental tests, using the display panel 100 that does not include the second dimming layer 152 as experimental sample 1, and the display panel 100 with the second dimming layer 152 as experimental sample 2; under the condition that other experimental conditions are the same, the inventor measured the following three sets of data, and the ratio of the brightness at the normal viewing angle of experimental sample 1 to the brightness at the normal viewing angle of experimental sample 2 is 5.08%, 6.36% and 6.69% respectively. Therefore, the ratio of the brightness at the normal viewing angle of experimental sample 1 to the brightness at the normal viewing angle of experimental sample 2 can reach an average of 6.04%. Therefore, the brightness at the normal viewing angle of the display panel 100 provided in the embodiment of the present application is improved by at least more than 5%, which has a huge benefit for the use of the display panel 100.

[0091] Some embodiments of the present application further provide a display device, which includes the display panel 100 described in any of the above embodiments.

[0092] Since the display device includes a display panel, it has all the technical effects of the display panel 100 described above, which will not be described in detail here.

[0093] Some embodiments of the present application further provide a method for manufacturing a display panel 100 , as shown in FIG4 , the method includes the following steps.

[0094] S10 , providing a driving substrate 11 .

[0095] S20 , manufacturing a pixel definition layer 12 and a light emitting device layer 13 on the driving substrate 11 , wherein 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 light emitting device 130 being located in one first opening K1 .

[0096] S30 , forming an encapsulation layer 14 on a side of the light emitting device layer 13 away from the driving substrate 11 .

[0097] S40. A dimming structure layer 15 is produced 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 which are sequentially arranged 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 side wall 1501 of the first dimming layer 151 located in 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.

[0098] Through the above-mentioned arrangement, when light is emitted from the light-emitting device 130, then enters the third dimming layer 153 from the bottom of the second opening K2 and is emitted toward the transition interface between the second dimming layer 152 and the third dimming layer 153, since the light is emitted from the material with a high refractive index to the material with a low refractive index, total reflection is easily generated, so that the light originally refracted from the third dimming layer 153 is reflected into the positive viewing angle, thereby increasing the brightness at the positive viewing angle and achieving an improvement in light extraction efficiency.

[0099] In some embodiments, as shown in FIG. 5 , in step S40 , a dimming structure layer 15 is formed on a side of the encapsulation layer 14 away from the driving substrate 11 , which includes the following steps.

[0100] S401 , forming a first dimming layer 151 on a side of the encapsulation layer 14 away from the driving substrate 11 .

[0101] S402 , pasting a protective film on the first dimming layer 151 and performing a degassing treatment; wherein the protective film includes a protective film body and a release agent layer located on a side of the protective film body close to the first dimming layer 151 .

[0102] S403 , removing the protective film body (for example, tearing off the protective film body), and forming the second dimming layer 152 on the release agent layer.

[0103] S404 , forming a third dimming layer 153 on a side of the second dimming layer 152 away from the first dimming layer 151 .

[0104] By using the above method, the manufacturing process of the second dimming layer 152 is very simple, which avoids the need for vapor deposition or sputtering processes when preparing nano- or submicron-level film layers in the display panel 100, thereby reducing the above process steps and improving the production efficiency of the display panel 100.

[0105] In summary, although the present application is disclosed above with preferred embodiments, the above preferred embodiments are not intended to limit the present application. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application is based on the scope defined by the claims.

Claims

1. A display panel, comprising: Driver substrate; A pixel definition layer and a light emitting device layer are provided on the driving substrate, wherein 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 being located in one of the first openings; an encapsulation layer, located on a side of the light-emitting device layer away from the driving substrate; as well as a dimming structure layer located on a side of the encapsulation layer away from the driving substrate, the dimming structure layer comprising a first dimming layer, a second dimming layer, and a third dimming layer sequentially arranged in 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 a sidewall of the first dimming layer located within the second opening, and the third dimming layer at least filling 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.

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

3. The display panel according to claim 2, wherein: The thickness of the second dimming layer is greater than or equal to 30 nm and less than or equal to 60 nm.

4. The display panel according to any one of claims 1 to 3, wherein: The second dimming layer includes at least one of fluorine-containing organic matter and organic silicon.

5. The display panel according to claim 4, wherein: The second dimming layer includes fluorine-containing organic matter and the atomic ratio of fluorine atoms in the second dimming layer is greater than 0 and less than 10%; and / or the second dimming layer includes organic silicon and the atomic ratio of silicon atoms in the second dimming layer is greater than 0 and less than 10%. The display panel according to claim 5 , wherein: The second dimming layer includes fluorine-containing organic matter and the atomic ratio of fluorine atoms in the second dimming layer is greater than 0 and less than 5%; and / or the second dimming layer includes organic silicon and the atomic ratio of silicon atoms in the second dimming layer is greater than 0 and less than 5%.

7. The display panel according to claim 4, wherein: In the case where the second dimming layer includes a fluorine-containing organic substance, the fluorine-containing organic substance is a fluorine release agent.

8. The display panel according to any one of claims 1 to 3, wherein: The third dimming layer includes an adhesive layer, and a side of the adhesive layer away from the driving substrate is configured to adhere to a polarizer.

9. The display panel according to claim 8, wherein: The material of the adhesive layer includes organic adhesive.

10. The display panel according to claim 9, wherein: The organic adhesive includes polymethyl methacrylate.

11. The display panel according to any one of claims 1 to 3, wherein: The refractive index of the second dimming layer is greater than or equal to 1.4 and less than 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.

12. The display panel according to any one of claims 1 to 3, wherein: The second dimming layer covers the sidewall of the first dimming layer located in the second opening and the surface of the first dimming layer located outside the second opening.

13. The display panel according to any one of claims 1 to 3, wherein: The second dimming layer covers the sidewall of the first dimming layer located in the second opening and the bottom of the second opening.

14. The display panel according to any one of claims 1 to 3, characterized in that: The second dimming layer simultaneously covers the sidewall of the first dimming layer located in the second opening, the surface of the first dimming layer located outside the second opening, and the bottom of the second opening.

15. The display panel according to any one of claims 1 to 3, wherein: 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.

16. The display panel according to any one of claims 1 to 3, wherein: An area of the second opening at a side away from the driving substrate is larger than an area of the second opening at a side close to the driving substrate.

17. The display panel according to claim 16, wherein: A sidewall of the second opening includes at least one of a curved surface and a flat surface.

18. A display device comprising a display panel, the display panel comprising: Driver substrate; A pixel definition layer and a light emitting device layer are provided on the driving substrate, wherein 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 being located in one of the first openings; an encapsulation layer, located on a side of the light-emitting device layer away from the driving substrate; as well as a dimming structure layer located on a side of the encapsulation layer away from the driving substrate, the dimming structure layer comprising a first dimming layer, a second dimming layer, and a third dimming layer sequentially arranged in 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 a sidewall of the first dimming layer located within the second opening, and the third dimming layer at least filling 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.

19. A method for manufacturing a display panel, comprising: Provide a drive substrate; A pixel definition layer and a light-emitting device layer are formed on the driving substrate, wherein 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 one of the first openings; forming an encapsulation layer on a side of the light-emitting device layer away from the driving substrate; as well as A dimming structure layer is fabricated on a side of the encapsulation layer away from the driving substrate, the dimming structure layer comprising a first dimming layer, a second dimming layer, and a third dimming layer sequentially arranged 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 a side wall of the first dimming layer located within the second opening, and the third dimming layer at least fills 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.

20. The method for manufacturing a display panel according to claim 19, wherein: A dimming structure layer is formed on a side of the encapsulation layer away from the driving substrate, comprising: A first dimming layer is formed on a side of the encapsulation layer away from the driving substrate; A protective film is attached to the first dimming layer and subjected to a degassing treatment; wherein the protective film comprises a protective film body and a release agent layer located on a side of the protective film body close to the first dimming layer; The protective film body is removed, and the release agent layer forms a second dimming layer; and A third dimming layer is formed on a side of the second dimming layer away from the first dimming layer.

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