Display panel and manufacturing method thereof, and display device

Abstract

The present application discloses a display panel, a preparation method thereof, and a display device. The display panel has a display area and a packaging area surrounding the display area. The display panel includes: a substrate; a light-emitting layer, located on one side of the substrate and located in the display area; an optical path control layer, located on the side of the light-emitting layer away from the substrate. The optical path control layer is used to change the angle of emission of light emitted by the light-emitting layer and emitted through the light path control layer. The optical path control layer is provided with a first section located in the display area and a second section located in the packaging area. Along the thickness direction of the display panel, the distance from the first section to the substrate is different from the distance from the second section to the substrate. The first section and the second section have different optical properties, so that the light emitted by the light-emitting layer and emitted through the first section and the second section respectively have different emission angles. The display panel, display device, and preparation method of the display panel of the embodiment of the present application can alleviate the display abnormality caused by the Newton ring display to a certain extent.

Description

Technical Field

[0001] 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

[0002] With the rapid development of display technology, organic light emitting diodes (OLEDs) ， OLED) has become a research hotspot in the field of display technology and has been widely used in display devices such as mobile phones and tablets.

[0003] OLED display panels consist of two main components: a display substrate and a cover plate. The display substrate is connected to the cover plate via an encapsulation structure. Due to limitations in the encapsulation process and other factors, it's difficult to ensure consistent cover plate height between the encapsulation area and other areas of the encapsulated display panel, leading to cover plate deformation. Consequently, when light from the display substrate exits through the cover plate, deformation can affect the display quality of the display panel. Summary of the Invention

[0004] The embodiments of the present application provide a display panel and a method for manufacturing the same, as well as a display device, which can improve the phenomenon of light path interference in the display panel and alleviate or resolve the Newton ring effect of the display panel to at least a certain extent.

[0005] In a first aspect, an embodiment of the present application provides a display panel, which has a display area and a packaging area surrounding the display area, and the display panel includes: a substrate; a light-emitting layer located on one side of the substrate and in the display area; a light path control layer located on the side of the light-emitting layer away from the substrate, the light path control layer being used to change the emission angle of light emitted by the light-emitting layer and emitted through the light path control layer, and a first segment located in the display area and a second segment located in the packaging area are provided on the light path control layer, and along the thickness direction of the display panel, the distance from the first segment to the substrate is different from the distance from the second segment to the substrate; wherein the first segment and the second segment have different optical properties, so that the light emitted by the light-emitting layer and emitted through the first segment and the second segment respectively have different emission angles.

[0006] In a second aspect, an embodiment of the present application provides a display device, which includes the display panel of the first aspect.

[0007] In a third aspect, an embodiment of the present application provides a method for manufacturing a display panel, the method comprising:

[0008] A light-emitting layer is prepared on the substrate, where the light-emitting layer is located in the display area of ​​the display panel;

[0009] A light path adjustment layer is prepared on the side of the light emitting layer facing away from the substrate, the light path adjustment layer is located in the display area and the packaging area surrounding the light emitting layer, and the light path adjustment layer includes a first section and a second section;

[0010] The optical properties of the first segment and / or the second segment are changed so that the light emitted by the light emitting layer and emitted through the first segment and the second segment respectively has different emission angles.

[0011] The display panel, display device, and display panel fabrication method according to the embodiments of the present application enable light emitted by the light-emitting layer and exiting through the first and second segments, respectively, to have different exit angles, thereby somewhat alleviating the optical path difference caused by the light path passing through a curved surface. By adjusting the exit angles of the first and second segments, interference between the light rays from the first and second segments is reduced, mitigating display anomalies caused by Newton rings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 A top view of a display device provided in one embodiment of the present application;

[0014] Figure 2 for Figure 1 A schematic cross-sectional view of the display panel along the AA direction is shown in the figure;

[0015] Figure 3 for Figure 1 Another cross-sectional schematic diagram of the display panel along the AA direction;

[0016] Figure 4 for Figure 1 Another cross-sectional schematic diagram of the display panel along the AA direction;

[0017] Figure 5 for Figure 1 Another cross-sectional schematic diagram of the display panel along the AA direction;

[0018] Figure 6 for Figure 1 Another cross-sectional schematic diagram of the display panel along the AA direction;

[0019] Figure 7 for Figure 1 Another cross-sectional schematic diagram of the display panel along the AA direction;

[0020] Figure 8 A schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present application.

[0021] In the attached figure:

[0022] 1. Substrate; 10. Packaging material;

[0023] 2. Luminescent layer;

[0024] 3. Light path control layer; 31. First section; 32. Second section; 321. First sub-section;

[0025] 322, second subsection; 323, first surface; 324, second surface; 325, transition section;

[0026] 326, second main section;

[0027] 100. Display device;

[0028] AA-display area; FA-packaging area. DETAILED DESCRIPTION

[0029] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating the examples of the present application.

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The embodiments will be described in detail below with reference to the accompanying drawings.

[0031] Relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0032] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or region, it may mean that it is directly on the other layer or region, or that other layers or regions are included between it and the other layer or region. Furthermore, if the component is turned over, the layer or region will be "below" or "beneath" the other layer or region.

[0033] In this document, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0034] It should be understood that in the embodiments of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0035] With the rapid development of display technology, organic light emitting diodes (OLEDs) ， OLED) has become a research hotspot in the field of display technology and has been widely used in display devices such as mobile phones and tablets.

[0036] The applicant of this application believes that the OLED display panel may include two major parts: a display substrate and a cover plate, and the display substrate and the cover plate are connected to each other by a packaging process. The packaging process may be, for example, UV glue packaging or Frit glue packaging.

[0037] The applicant found that, due to the limitations of packaging technology and precision, it is difficult to ensure that the height of each area of ​​the display panel remains consistent after packaging. In other words, some areas of the display panel will have different heights. This height inconsistency is mainly reflected in the inconsistent height of the cover plate in the packaging area and the display area. Taking Frit glue packaging as an example, the packaging process requires the use of laser to melt the Frit glue. The solidified Frit glue can bond the display substrate 1 and the cover plate together to achieve packaging. However, the packaging performance of Frit glue is strongly related to the height, and Frit glue of a specific thickness has good packaging performance. However, the height of the support column of the display panel is difficult to perfectly match the height of the Frit glue. Therefore, the height of the Frit glue packaging area and the support column located in the display area do not match, which leads to inconsistent heights between the packaging area and the display area, and then causes concentric rings to appear on the display panel, which is also called a light path interference phenomenon of Newton rings, which seriously affects the display effect of the display panel.

[0038] Furthermore, the applicant realized that the display anomaly caused by the deformation of the cover plate is mainly due to the deformation of the part of the cover plate located in the packaging area during the process of light being emitted from the display substrate 1 and passing through the cover plate, which causes part of the light path to be deflected through the curved surface, thereby causing an optical path difference between the light path in the packaging area and the display area, causing light interference, and ultimately leading to display anomalies near the packaging area of ​​the display panel.

[0039] This application is proposed in order to alleviate or solve the above technical problems to at least a certain extent.

[0040] In order to better understand this application, Figures 1 to 8 The display panel, the display device 100 and the method for manufacturing the display panel according to the embodiments of the present application are described in detail.

[0041] See also Figures 1 to 2 , Figure 1 A top view of a display device provided in accordance with an embodiment of the present application. Figure 2 for Figure 1 A schematic cross-sectional view of the display panel along the AA direction is shown in FIG.

[0042] The embodiment of the present application provides a display panel, such as Figure 1 and Figure 2 As shown, the display panel has a display area AA and an encapsulation area FA surrounding the display area AA. The display panel includes a substrate 1, a light-emitting layer 2, and a light path control layer 3. The light-emitting layer 2 is located on one side of the substrate 1 and in the display area AA. The light path control layer 3 is located on the side of the light-emitting layer 2 facing away from the substrate 1. The light path control layer 3 is used to change the angle of light emitted by the light-emitting layer 2 and exiting through the light path control layer 3. The light path control layer 3 is provided with a first segment 31 located in the display area AA and a second segment 32 located in the encapsulation area FA. Along the thickness of the display panel, the distance from the first segment 31 to the substrate 1 is different from the distance from the second segment 32 to the substrate 1. The first segment 31 and the second segment 32 have different optical properties, so that the light emitted by the light-emitting layer 2 and exiting through the first segment 31 and the second segment 32 respectively have different exit angles.

[0043] The display panel of the embodiment of the present application has a display area AA and a packaging area FA surrounding the display area AA. It should be noted that the packaging area FA of the embodiment of the present application is not limited to the area where the packaging material 10 such as Frit glue is located, but may also include an area adjacent to the area where the packaging material 10 is located and located outside the display area AA. The sizes of the display area AA and the packaging area FA are not limited.

[0044] The light emitting layer 2 is located in the display area AA, that is, the light emitting layer 2 corresponds to the display area AA. Newton rings often appear between the display area AA and the encapsulation area FA or near the connection between the two areas.

[0045] The light path control layer 3 is located on the side of the light-emitting layer 2 facing away from the substrate 1. The light path control layer 3 can regulate the light emitted by the light-emitting layer 2 and exiting through the light path control layer 3 to adjust the exit angle of the exiting light. For example, the light path control layer 3 can be a cover plate. In other words, the cover plate itself can function as the light path control layer 3, thereby adjusting the exit angle of the light exiting the cover plate.

[0046] The light path control layer 3 is provided with a first section 31 located in the display area AA and a second section 32 located in the encapsulation area FA. Along the thickness direction of the display panel, the distance between the first section 31 and the substrate 1 is different from the distance between the second section 32 and the substrate 1. In other words, the heights of the first section 31 and the second section 32 are different. Therefore, by providing the first section 31 and the second section 32 with different optical properties, the light emitted by the light-emitting layer 2 and exiting through the first section 31 and the second section 32 respectively have different exit angles, which to some extent alleviates the phenomenon of optical path difference caused by the light path passing through the curved surface. In this embodiment, the optical properties can include parameters that directly affect the light path, such as reflectivity and refractive index, or parameters that indirectly affect the light path, such as the surface roughness of the light-emitting surface and the light-entering surface, which can affect the reflectivity and thus indirectly affect the light path. For example, the properties of the material itself can affect the refractive index of the light passing through the material. By adjusting the emission angles of the first segment 31 and the second segment 32 , the interference between the light of the first segment 31 and the light of the second segment 32 is improved, and the display abnormality caused by the Newton ring display is alleviated.

[0047] See also Figure 3 , Figure 3 for Figure 1 Another cross-sectional schematic diagram of the display panel along the AA direction is shown in FIG.

[0048] like Figure 3 As shown, in some embodiments, the second segment 32 is divided into a plurality of sub-segments distributed successively in a direction away from the first segment 31, and the distances between the plurality of sub-segments and the substrate 1 tend to gradually increase or decrease in the direction away from the first segment 31. The plurality of sub-segments include a first sub-segment 321 and a second sub-segment 322 adjacent to the first sub-segment 321. The brightness of the first sub-segment 321 is L1, and the absolute value of the brightness difference between the first sub-segment 321 and the second sub-segment 322 is less than or equal to L1×2%. Alternatively, the grayscale of the first sub-segment 321 is G1, and the absolute value of the grayscale difference between the first sub-segment 321 and the second sub-segment 322 is less than or equal to G1×2%.

[0049] In this embodiment, the first segment 31 is located in the display area AA, and the second segment 32 is located in the encapsulation area FA. The direction away from the first segment 31 can be understood as the direction away from the display area AA. The distances between the multiple sub-segments and the substrate 1 tend to gradually increase or decrease. In other words, the height of the light path regulation layer 3 from the display area AA to the encapsulation area FA varies in a continuous gradient. Therefore, the optical properties of each sub-segment can be gradually adjusted, thereby achieving adjustment of the optical properties of the entire light path regulation layer 3, avoiding sudden changes in the optical properties of the light path regulation layer 3, which in turn may cause sudden changes in the display effect of the display panel.

[0050] For example, the brightness of multiple sub-segments can be gradually adjusted. The multiple sub-segments include a first sub-segment 321 and a second sub-segment 322 adjacent to the first sub-segment 321. The brightness of the first sub-segment 321 is L1, and the absolute value of the brightness difference between the first sub-segment 321 and the second sub-segment 322 is less than or equal to L1 × 2%. In other words, the brightness difference between two consecutive sub-segments is within 2%. The continuous and gradual brightness change between the multiple sub-segments makes it difficult for the human eye to discern the display difference between the display area AA and the encapsulation area FA, thereby improving the display smoothness of the display panel.

[0051] For example, the grayscale values ​​of multiple sub-segments can be adjusted gradually. The grayscale of the first sub-segment 321 is G1, and the absolute value of the grayscale difference between the first sub-segment 321 and the second sub-segment 322 is less than or equal to G1 × 2%. This means that the grayscale difference between two consecutive sub-segments is within 2%. This continuous and gradual change in grayscale between multiple sub-segments makes it difficult for the human eye to discern the difference between the display area AA and the encapsulation area FA, thereby improving the display smoothness of the display panel.

[0052] In the following embodiments, the gradually increasing distance between the second section 32 and the substrate 1 in the direction away from the first section 31 is first used as an example for explanation, that is, the height of the second section 32 close to the packaging material 10 is higher, and the height of the second section 32 close to the display area AA is lower.

[0053] See also Figure 4 , Figure 4 for Figure 1 Another cross-sectional schematic diagram of the display panel along the AA direction.

[0054] like Figure 4As shown, in some embodiments, the distance from the second segment 32 to the substrate 1 tends to gradually increase along the direction away from the first segment 31, and the optical properties of the second segment 32 tend to gradually increase or decrease along the direction away from the first segment 31, so that the emission angles of the multiple light rays emitted by the light-emitting layer 2 and emitted through the second segment 32 tend to gradually increase along the direction away from the first segment 31.

[0055] In this embodiment, the distance from the second segment 32 to the substrate 1 tends to gradually increase. That is, the height of the portion of the light path control layer 3 located in the encapsulation area FA is greater than the height of the portion located in the display area AA, and this height change is a gradual gradient. Therefore, by gradually changing the optical properties of the second segment 32, i.e., gradually increasing or decreasing the optical properties of the second segment 32, the emission angles of the multiple light rays emitted by the light-emitting layer 2 and exiting through the second segment 32 are adjusted so that these emission angles tend to gradually increase away from the first segment 31. This, to some extent, alleviates the phenomenon of excessive deflection caused by the light path passing through the curved surface. This reduces the optical path difference between the encapsulation area FA and the display area AA, improves the interference of light rays in the two areas, and reduces the probability of Newton rings.

[0056] In some embodiments, the density of the second segment 32 tends to gradually decrease along a direction away from the first segment 31 , so that the refractive index of the second segment 32 tends to gradually decrease along a direction away from the first segment 31 .

[0057] In these embodiments, the refractive index of light passing through the second segment 32 is adjusted by varying the density of the second segment 32. The density of the second segment 32 decreases gradually as it moves away from the first segment 31. This means that the density of the light path control layer 3 is gradually adjusted in response to the height gradient between the encapsulation area FA and the display area AA. This mitigates the difference in the angle of incidence between the light rays exiting the encapsulation area FA and the display area AA to a certain extent, gradually reducing the deflection of light rays from the encapsulation area FA to the display area AA, thereby improving the display uniformity of the display panel and reducing the likelihood of Newton ring display anomalies.

[0058] Please continue reading Figure 4 ,like Figure 4 As shown, in some embodiments, along the light emitting direction of the light-emitting layer 2, the second segment 32 has two opposite surfaces, and the surface roughness of at least one surface tends to gradually increase in the direction away from the first segment 31, so that the reflectivity of the surface tends to gradually decrease in the direction away from the first segment 31.

[0059] In this embodiment, light emitted from the light-emitting layer 2 passes through the two aforementioned surfaces. The surface roughness of these two surfaces determines the reflectivity of the light passing through them. At least one surface exhibits a gradually increasing roughness as it moves away from the first segment 31, resulting in a gradually decreasing reflectivity of the surface as it moves away from the first segment 31. This ensures that the reflection angle of light near the encapsulation area FA is smaller, while the reflection angle near the display area AA is larger. This, to some extent, mitigates the optical path differences caused by the height differences of the optical path control layer 3, reducing the occurrence of display anomalies such as Newton rings.

[0060] like Figure 4 As shown, in some embodiments, the two surfaces include a first surface 323 facing away from the substrate, and the surface roughness of the first surface 323 tends to gradually increase in the direction away from the first segment 31, so that the reflectivity of the first surface 323 tends to gradually decrease in the direction away from the first segment 31.

[0061] In this embodiment, the two surfaces are a first surface 323 and a second surface 324. Light emitted from the light-emitting layer 2 and passing through the light path control layer 3 ultimately exits from the first surface 323. Because the first surface 323 is closer to the human eye, adjusting the optical properties of the first surface 323 more directly reflects the final display effect. The reflectivity of the first surface 323 gradually decreases as it moves away from the first segment 31. In other words, the portion of the first surface 323 near the first segment 31 has a higher reflectivity and reflects light to a greater extent. The portion of the first surface 323 near the encapsulation area FA has a lower reflectivity and reflects less light.

[0062] In the above embodiments, the distance between the second segment 32 and the substrate 1 gradually increases as it moves away from the first segment 31. Therefore, the following embodiments will be briefly described using the example of the distance between the second segment 32 and the substrate 1 gradually decreasing as it moves away from the first segment 31. In other words, the height of the second segment 32 near the encapsulation material 10 is relatively low, while the height of the second segment 32 near the display area AA is relatively high.

[0063] See also Figure 5 , Figure 5 for Figure 1 Another cross-sectional schematic diagram of the display panel along the AA direction;

[0064] like Figure 5As shown, in some embodiments, the distance from the second segment 32 to the substrate 1 tends to gradually decrease along the direction away from the first segment 31, and the optical properties of the second segment 32 tend to gradually increase or decrease along the direction away from the first segment 31, so that the emission angles of the multiple light rays emitted by the light-emitting layer 2 and emitted through the second segment 32 tend to gradually decrease along the direction away from the first segment 31, gradually improving the optical path difference between the emitted light rays from the second segment 32 and the first segment 31, and improving the display abnormality of Newton's rings.

[0065] In some embodiments, the density of the second segment 32 gradually increases as it moves away from the first segment 31, so that the refractive index of the second segment 32 gradually increases as it moves away from the first segment 31. By gradually changing the refractive index of the second segment 32, the angle of the light emitted from the light path control layer 3 is adjusted, thereby improving the display effect of the display panel.

[0066] See also Figure 6 , Figure 6 for Figure 1 Another cross-sectional schematic diagram of the display panel along the AA direction.

[0067] like Figure 6 As shown, the distance from the second segment 32 to the substrate 1 gradually decreases as it moves away from the first segment 31. Along the light-emitting direction of the light-emitting layer 2, the second segment 32 has two opposing surfaces, at least one of which has a surface roughness that gradually decreases as it moves away from the first segment 31, resulting in a surface reflectivity that gradually increases as it moves away from the first segment 31. In this embodiment, by adjusting the reflectivity of the surface as light passes through it, the reflection angle of the light is adjusted, improving the optical path difference and reducing optical interference between the first segment 31 and the second segment 32.

[0068] Please continue reading Figure 6 The two surfaces include a first surface 323 facing away from the substrate. The surface roughness of the first surface 323 decreases gradually as it moves away from the first segment 31, so that the reflectivity of the first surface 323 increases gradually as it moves away from the first segment 31. By adjusting the reflectivity of the first surface 323 near the human eye, the optical path difference is adjusted, resulting in a more uniform display effect on the display panel.

[0069] In the aforementioned embodiments, the distance between the second section 32 and the substrate 1 tends to gradually decrease. In other words, the height of the encapsulation area FA in the aforementioned embodiments is less than the height of the display area AA. Similar to the aforementioned embodiments in which the encapsulation area FA is greater than the height of the display area AA, when the encapsulation area FA is less than the height of the display area AA, the deflection of light from the display area AA to the encapsulation area FA exhibits an opposite trend. The specific technical means and technical effects can be inferred from the case in which the encapsulation area FA is greater than the height of the display area AA, and will not be further described here.

[0070] See also Figure 7 , Figure 7 for Figure 1 Another cross-sectional schematic diagram of the display panel along the AA direction is shown in FIG.

[0071] like Figure 7 As shown, in some embodiments, the second section 32 is divided into a transition section 325 and a second main section 326, which are sequentially distributed along a direction away from the first section 31. Along the thickness of the display panel, the distance between the transition section 325 and the substrate 1 differs from the distance between the second main section 326 and the substrate 1. Light emitted by the light-emitting layer 2 and exiting through the second main section 326 has a first exit angle, while light emitted by the light-emitting layer 2 and exiting through the transition section 325 has a second exit angle. The transition section 325 and the second main section 326 have different optical properties, such that the first exit angle is greater than the second exit angle.

[0072] In this embodiment, the second section 32 is further divided into a transition section 325 and a second main section 326 in a direction away from the first section 31. That is, the second main section 326 is closer to the packaging material 10, and the transition section 325 refers to the area between the area where the packaging material 10 is located and the display area AA. The light emitted through the second main section 326 and the light emitted through the transition section 325 have different emission angles due to the different curvatures of the light emitting surface. The curvature of the light emitting surface in the area close to the packaging material 10 is larger, and thus the emission angle is often larger. Therefore, increasing the first emission angle so that the first emission angle is greater than the second emission angle can slow down the deflection difference of the light between the transition area and the second main section 326, reduce the optical path difference of the light in the two areas, reduce the interference of light and the generation of the Newton ring phenomenon, and improve the display effect and display reliability of the display panel.

[0073] The present invention provides a display device 100, which includes a display panel according to any of the above embodiments. The display panel provided in the present invention can be any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigation system.

[0074] The present application also provides a method for manufacturing a display panel. Figure 8 , Figure 8 A schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present application.

[0075] like Figure 8 As shown, the method for manufacturing a display panel provided in an embodiment of the present application includes:

[0076] Step S01: preparing a light-emitting layer 2 on a substrate 1 , wherein the light-emitting layer 2 is located in a display area AA of a display panel.

[0077] Step S02 : preparing a light path regulating layer 3 on the side of the light emitting layer 2 facing away from the substrate 1 . The light path regulating layer 3 is located in the display area AA and the packaging area FA surrounding the light emitting layer 2 . The light path regulating layer includes a first section 31 and a second section 32 .

[0078] Step S03 : changing the optical properties of the first section 31 and / or the second section 32 so that the light emitted by the light emitting layer 2 and emitted through the first section 31 and the second section 32 respectively have different emission angles.

[0079] Under the action of the first segment 31 and the second segment 32 manufactured by the above steps, the optical properties of the first segment 31 and the second segment 32 are different, which changes the emission angle of the outgoing light of the first segment 31 and the second segment 32, and alleviates the phenomenon of light interference caused by the optical path difference between the packaging area FA and the display area AA to a certain extent, reduces the possibility of Newton rings, and improves the reliability of the display panel.

[0080] In summary, the embodiments of the present application provide a display panel, a method for manufacturing the same, and a display device, capable of ensuring that light emitted by the light-emitting layer and exiting through the first and second segments, respectively, have different exit angles, thereby alleviating, to a certain extent, the optical path difference caused by the light path passing through a curved surface. By adjusting the exit angles of the first and second segments, interference between the light rays from the first and second segments is reduced, display anomalies caused by Newton rings are mitigated, and the reliability of the display panel is improved.

[0081] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A display panel, characterized in that: The display panel has a display area and a packaging area surrounding the display area, and the display panel includes: substrate; a light-emitting layer, located on one side of the substrate and in the display area; a light path regulation layer, located on a side of the light-emitting layer facing away from the substrate, the light path regulation layer being used to change the angle of light emitted by the light-emitting layer and exiting through the light path regulation layer; the light path regulation layer being provided with a first section located in the display area and a second section located in the encapsulation area; and along the thickness direction of the display panel, a distance from the first section to the substrate and a distance from the second section to the substrate are different; The first section and the second section have different optical properties, so that the light emitted by the light-emitting layer and emitted through the first section and the second section respectively have different emission angles; Along the direction away from the first segment, the distance from the second segment to the substrate has a tendency to gradually increase, and along the direction away from the first segment, the optical properties of the second segment have a tendency to gradually increase or decrease, so that the emission angles of multiple light rays emitted by the light-emitting layer and emitted through the second segment have a tendency to gradually increase along the direction away from the first segment.

2. The display panel according to claim 1, wherein: The second section is divided into a plurality of sub-sections distributed successively in a direction away from the first section, and distances from the plurality of sub-sections to the substrate tend to gradually increase or decrease in the direction away from the first section; The multiple sub-segments include a first sub-segment and a second sub-segment adjacent to the first sub-segment, the brightness of the first sub-segment is L1, and the absolute value of the brightness difference between the first sub-segment and the second sub-segment is less than or equal to L1×2%; or, The grayscale of the first sub-segment is G1, and the absolute value of the grayscale difference between the first sub-segment and the second sub-segment is less than or equal to G1×2%.

3. The display panel according to claim 1, wherein: The density of the second segment has a tendency to gradually decrease along the direction away from the first segment, so that the refractive index of the second segment has a tendency to gradually decrease along the direction away from the first segment.

4. The display panel according to claim 1, wherein: Along the light emitting direction of the light-emitting layer, the second segment has two opposite surfaces, and the surface roughness of at least one of the surfaces tends to gradually increase in the direction away from the first segment, so that the reflectivity of the surface tends to gradually decrease in the direction away from the first segment.

5. The display panel according to claim 4, wherein: The two surfaces include a first surface facing away from the substrate, wherein the surface roughness of the first surface tends to gradually increase in a direction away from the first section, so that the reflectivity of the first surface tends to gradually decrease in the direction away from the first section.

6. The display panel according to claim 1, wherein: The second section is divided into a transition section and a second main section that are successively distributed in a direction away from the first section, and along the thickness direction of the display panel, a distance between the transition section and the substrate is different from a distance between the second main section and the substrate; The light emitted by the light-emitting layer and emitted through the second main section has a first emission angle, and the light emitted by the light-emitting layer and emitted through the transition section has a second emission angle. The transition section and the second main section have different optical properties, so that the first emission angle is greater than the second emission angle.

7. A display panel, characterized in that: The display panel has a display area and a packaging area surrounding the display area, and the display panel includes: substrate; a light-emitting layer, located on one side of the substrate and in the display area; a light path regulation layer, located on a side of the light-emitting layer facing away from the substrate, the light path regulation layer being used to change the angle of light emitted by the light-emitting layer and exiting through the light path regulation layer; the light path regulation layer being provided with a first section located in the display area and a second section located in the encapsulation area; and along the thickness direction of the display panel, a distance from the first section to the substrate and a distance from the second section to the substrate are different; The first section and the second section have different optical properties, so that the light emitted by the light-emitting layer and emitted through the first section and the second section respectively have different emission angles; Along the direction away from the first segment, the distance from the second segment to the substrate has a tendency to gradually decrease, and along the direction away from the first segment, the optical properties of the second segment have a tendency to gradually increase or decrease, so that the emission angles of multiple light rays emitted by the light-emitting layer and emitted through the second segment have a tendency to gradually decrease along the direction away from the first segment.

8. The display panel according to claim 7, wherein: The second section is divided into a plurality of sub-sections distributed successively in a direction away from the first section, and distances from the plurality of sub-sections to the substrate tend to gradually increase or decrease in the direction away from the first section; The multiple sub-segments include a first sub-segment and a second sub-segment adjacent to the first sub-segment, the brightness of the first sub-segment is L1, and the absolute value of the brightness difference between the first sub-segment and the second sub-segment is less than or equal to L1×2%; or, The grayscale of the first sub-segment is G1, and the absolute value of the grayscale difference between the first sub-segment and the second sub-segment is less than or equal to G1×2%.

9. The display panel according to claim 7, wherein: The density of the second segment has a tendency to gradually increase along the direction away from the first segment, so that the refractive index of the second segment has a tendency to gradually increase along the direction away from the first segment.

10. The display panel according to claim 7, wherein: In a direction away from the first section, the distance from the second section to the substrate has a tendency to gradually decrease; Along the light emitting direction of the light-emitting layer, the second segment has two opposite surfaces, and the surface roughness of at least one of the surfaces tends to gradually decrease in the direction away from the first segment, so that the reflectivity of the surface tends to gradually increase in the direction away from the first segment.

11. The display panel according to claim 10, wherein: The two surfaces include a first surface facing away from the substrate, wherein the surface roughness of the first surface has a tendency to gradually decrease along a direction away from the first section, so that the reflectivity of the first surface has a tendency to gradually increase along the direction away from the first section.

12. The display panel according to claim 7, wherein: The second section is divided into a transition section and a second main section that are successively distributed in a direction away from the first section, and along the thickness direction of the display panel, a distance between the transition section and the substrate is different from a distance between the second main section and the substrate; The light emitted by the light-emitting layer and emitted through the second main section has a first emission angle, and the light emitted by the light-emitting layer and emitted through the transition section has a second emission angle. The transition section and the second main section have different optical properties, so that the first emission angle is greater than the second emission angle.

13. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 12.

14. A method for preparing a display panel, characterized in that: The preparation method comprises: preparing a light-emitting layer on a substrate, wherein the light-emitting layer is located in a display area of ​​the display panel; A light path regulating layer is prepared on a side of the light emitting layer away from the substrate, the light path regulating layer is located in the display area and the packaging area surrounding the light emitting layer, and the light path regulating layer includes a first section and a second section; changing the optical properties of the first segment and / or the second segment so that the light emitted by the light-emitting layer and emitted through the first segment and the second segment respectively has different emission angles; Along the direction away from the first segment, the distance from the second segment to the substrate tends to gradually increase, and along the direction away from the first segment, the optical characteristics of the second segment have a gradually increasing or gradually decreasing change, so that the emission angles of multiple light rays emitted by the light-emitting layer and emitted through the second segment tend to gradually increase along the direction away from the first segment; or, along the direction away from the first segment, the distance from the second segment to the substrate tends to gradually decrease, and along the direction away from the first segment, the optical characteristics of the second segment have a gradually increasing or gradually decreasing change, so that the emission angles of multiple light rays emitted by the light-emitting layer and emitted through the second segment tend to gradually decrease along the direction away from the first segment.

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