Display panel, display device, and display panel preparation method

Abstract

The present disclosure relates to a display panel, a display device, and a display panel preparation method. The display panel comprises: a substrate; a display layer, the display layer being located on a side of the substrate, and the display layer comprising a plurality of sub-pixels; a touch layer, the touch layer being located on a side of the display layer facing away from the substrate, and the touch layer comprising a mesh-shaped touch electrode; and a viewing angle adjustment grating, the viewing angle adjustment grating being in contact with a side of the mesh-shaped touch electrode facing away from the display layer, wherein a vertical projection of the viewing angle adjustment grating on the substrate overlaps with a vertical projection of at least a portion of the mesh-shaped touch electrode on the substrate. The technical solution of the present disclosure, while achieving anti-peeping for the display panel, simplifies the preparation process of the display panel and reduces production costs.

Description

Display panel, display device, and method for manufacturing display panel

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411179034.1, filed on August 26, 2024, entitled “Display Panel, Display Device and Method for Manufacturing Display Panel”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of display technology, specifically to a display panel, a display device, and a method for manufacturing the display panel. Background Technology

[0004] With the development of display technology, display devices such as mobile phones and computers are being used more and more widely. Typically, display devices have a wide viewing angle, allowing users at different angles to see the displayed information. However, in some scenarios, users may want the information displayed on the device to be hidden from other users nearby, thus requiring the display device to have a privacy feature.

[0005] In related privacy protection technologies, privacy films are generally attached to the surface of the display panel after the display device is manufactured, or the grating is directly integrated onto the display panel by adding a process. The production cost of the above methods is high and the process is complex.

[0006] Summary of the Invention

[0007] To address the aforementioned technical problems, this disclosure provides a display panel, a display device, and a method for manufacturing the display panel. While achieving privacy protection in the display panel, it simplifies the manufacturing process and reduces production costs.

[0008] In a first aspect, this disclosure provides a display panel, including:

[0009] Substrate;

[0010] A display layer is located on one side of the substrate, and the display layer includes a plurality of sub-pixels;

[0011] A touch layer is located on the side of the display layer opposite to the substrate, and the touch layer includes a grid-like touch electrode.

[0012] A viewing angle adjustment grating is provided, which contacts the side of the mesh-shaped touch electrode facing away from the display layer; the vertical projection of the viewing angle adjustment grating on the substrate overlaps with the vertical projection of at least a portion of the mesh-shaped touch electrode on the substrate.

[0013] Secondly, this disclosure also provides a display device, including the display panel described in the second aspect.

[0014] Thirdly, this disclosure also provides a method for manufacturing a display panel, comprising:

[0015] Forming a substrate;

[0016] A display layer is formed on one side of the substrate, the display layer comprising a plurality of sub-pixels;

[0017] A touch material layer is formed on the side of the display layer opposite to the substrate;

[0018] A photoresist layer is formed on the side of the touch material layer opposite to the display layer, and the photoresist layer is exposed to form a photoresist pattern.

[0019] At least a portion of the mesh-shaped touch electrode is formed by developing the photoresist pattern;

[0020] At least a portion of the photoresist pattern is retained as a viewing angle adjustment grating.

[0021] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0022] This disclosure provides a display panel, a display device, and a method for fabricating the display panel. The display panel includes a substrate; a display layer located on one side of the substrate, the display layer including a plurality of sub-pixels; a touch layer located on the side of the display layer opposite to the substrate, the touch layer including a grid-shaped touch electrode; and a viewing angle adjustment grating, the viewing angle adjustment grating contacting the side of the grid-shaped touch electrode opposite to the display layer; the vertical projection of the viewing angle adjustment grating onto the substrate overlaps with the vertical projection of at least a portion of the grid-shaped touch electrode onto the substrate. In this embodiment, by providing a viewing angle adjustment grating on the side of the grid-shaped touch electrode opposite to the display layer, the viewing angle adjustment grating blocks the light emitted from the display layer, thereby achieving the purpose of privacy protection and reducing the viewing angle of the display panel. This eliminates the need for an additional privacy film, simplifying the manufacturing process of the display panel and reducing production costs. Furthermore, it reduces the number of film layers in the display device, facilitating a thinner and lighter display device, and avoiding the problem of easily damaged privacy films attached to the display panel, which would render the display device ineffective in providing privacy protection. Attached Figure Description

[0023] This application can be better understood from the following description of specific embodiments in conjunction with the accompanying drawings, wherein other features, objects and advantages of this application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar features.

[0024] Figure 1 is a partially enlarged top view of a display panel according to an embodiment of this disclosure;

[0025] Figure 2 is a cross-sectional structural diagram of a display panel provided in an embodiment of this disclosure;

[0026] Figure 3 is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of this disclosure;

[0027] Figures 4-16 are schematic cross-sectional views of each step in the fabrication method of the display panel shown in Figure 3.

[0028] Figure 17 is a partially enlarged top view of another display panel provided in an embodiment of this disclosure;

[0029] Figure 18 is a partially enlarged top view of another display panel provided in an embodiment of this disclosure;

[0030] Figure 19 is a partially enlarged top view of another display panel provided in an embodiment of this disclosure;

[0031] Figure 20 is a partially enlarged top view of another display panel provided in an embodiment of this disclosure;

[0032] Figure 21 is a partially enlarged top view of another display panel provided in an embodiment of this disclosure;

[0033] Figure 22 is a cross-sectional structural diagram of another display panel provided in an embodiment of this disclosure;

[0034] Figure 23 is a partially enlarged top view of another display panel provided in an embodiment of this disclosure;

[0035] Figure 24 is a partially enlarged top view of another display panel provided in an embodiment of this disclosure;

[0036] Figure 25 is a partial top view of another display panel provided in an embodiment of this disclosure;

[0037] Figure 26 is an enlarged schematic diagram of region Q in Figure 11;

[0038] Figure 27 is a cross-sectional structural diagram of another display panel provided in an embodiment of this disclosure;

[0039] Figure 28 is a partial top view of another display panel provided in an embodiment of this disclosure;

[0040] Figure 29 is an enlarged schematic diagram of region P in Figure 13;

[0041] Figure 30 is a cross-sectional structural diagram of another display panel provided in an embodiment of this disclosure;

[0042] Figure 31 is a cross-sectional structural diagram of another display panel provided in an embodiment of this disclosure;

[0043] Figure 32 is a cross-sectional structural diagram of another display panel provided in an embodiment of this disclosure;

[0044] Figure 33 is a schematic diagram of the structure of a display device provided in an embodiment of this disclosure. Detailed Implementation

[0045] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are disclosed in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. This application is by no means limited to any specific configurations and algorithms presented below, but covers any modifications, substitutions, and improvements to elements, components, and algorithms without departing from the spirit of this application. Well-known structures and techniques are not shown in the accompanying drawings and the following description in order to avoid unnecessary obfuscation of this application.

[0046] In related privacy protection technologies, privacy films are generally attached to the surface of the display panel after the display device is manufactured, or light-blocking gratings are directly integrated onto the display panel by adding process steps. The production costs of the above methods are high and the processes are complex.

[0047] To address the aforementioned issues, this disclosure provides a display panel comprising a substrate; a display layer located on one side of the substrate and including a plurality of sub-pixels; a touch layer located on the side of the display layer opposite to the substrate and including a grid-shaped touch electrode; and a viewing angle adjustment grating in contact with the side of the grid-shaped touch electrode opposite to the display layer. The vertical projection of the viewing angle adjustment grating onto the substrate overlaps with the vertical projection of at least a portion of the grid-shaped touch electrode onto the substrate. Thus, by providing a viewing angle adjustment grating on the side of the grid-shaped touch electrode opposite to the display layer, the viewing angle adjustment grating blocks the light emitted from the display layer, thereby achieving privacy protection and reducing the viewing angle of the display panel. Furthermore, the elimination of the need for an additional privacy film simplifies the manufacturing process, reduces production costs, and reduces the number of film layers in the display device, facilitating a thinner and lighter display device. It also avoids the problem of easily damaged privacy films attached to the display panel, which would render the display device ineffective in providing privacy protection.

[0048] Figure 1 is a partially enlarged top view of a display panel according to an embodiment of this disclosure, and Figure 2 is a cross-sectional view of a display panel according to an embodiment of this disclosure. Referring to Figures 1 and 2, substrate 1 is used to support and protect the film layer located thereon. Substrate 1 can be a rigid substrate, for example, the material of substrate 1 is glass. Substrate 1 can also be a flexible substrate; for example, the material of substrate 1 may include one or more combinations of polymer resins selected from polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, and cellulose acetate propionate. This disclosure does not specifically limit the material of substrate 1.

[0049] The display layer 2 is located on one side of the substrate 1 and includes a plurality of sub-pixels 21 for realizing the display function of the display panel 100. Figure 2 shows two sub-pixels 21 of the display layer 2 as an example. The specific number of sub-pixels 21 can be set according to the actual display requirements of the display panel 100, and this embodiment does not limit this. The touch layer 3 is used to realize the touch effect of the display panel 100. The touch layer 3 may include, for example, a grid-shaped touch electrode 31. The grid-shaped touch electrode 31 surrounds adjacent sub-pixels 21 and is used to receive touch driving signals and generate touch sensing signals based on external touch. The structure of the grid-shaped touch electrode 31 can be a metal mesh. The grid-shaped touch electrode 31 includes a plurality of metal lines extending along a first direction and a second direction. The metal lines extending in different directions intersect to form a mesh. At least some adjacent grid-shaped touch electrodes 31 are provided with a break portion 311 to achieve insulation between adjacent grid-shaped touch electrodes 31.

[0050] Figure 2 also exemplarily illustrates an encapsulation layer 7 disposed between the touch layer 3 and the display layer 2. The encapsulation layer 7 can be, for example, an inorganic layer. Since inorganic layers have strong barrier capabilities, such as blocking water and oxygen, they can ensure that the sub-pixel 21 is not affected by moisture and oxygen, thus improving the lifespan of the sub-pixel 21. In this embodiment, when the encapsulation layer 7 includes multiple organic and inorganic layers, it can further prevent moisture and oxygen from entering the interior of the sub-pixel 21, improving the lifespan of the sub-pixel 21 and ensuring reliable encapsulation. The specific structure of the encapsulation layer 7 is not specifically shown in Figure 1. The specific film structure of the encapsulation layer 7 can be set according to the actual usage requirements of the display panel 100, and this embodiment does not limit this.

[0051] The display panel 100 may further include a viewing angle adjustment grating 4, which contacts the side of the grid-shaped touch electrode 31 facing away from the display layer 2. FIG2 exemplarily shows that the vertical projection of the viewing angle adjustment grating 4 onto the substrate 1 and the vertical projection of the grid-shaped touch electrode 31 onto the substrate 1 completely overlap within the error range. Alternatively, the vertical projection of the viewing angle adjustment grating 4 onto the substrate 1 may partially overlap with the vertical projection of the grid-shaped touch electrode 31 onto the substrate 1; this embodiment does not limit this. The viewing angle adjustment grating 4 may be trapezoidal as shown in FIG2, or it may be rectangular or other shapes; this embodiment does not limit this.

[0052] In Figure 2, solid arrows represent the directions of light rays that can be emitted outwards, while dashed arrows represent the directions of light rays that cannot be emitted due to being blocked by the viewing angle adjustment grating 4. Referring to Figure 2, it can be seen that the viewing angle adjustment grating 4 can block the light rays emitted by the sub-pixels 21 in the display layer 2. That is, the light rays emitted by the sub-pixels 21 in the display layer 2 are blocked after hitting the viewing angle adjustment grating 4 and cannot be emitted outwards. The light rays are emitted as close as possible to the direction perpendicular to the substrate 1. Users at positions deviating from the direction perpendicular to the substrate 1 cannot receive the light rays emitted by the sub-pixels 21 in the display layer 2, thus achieving a privacy protection effect.

[0053] This embodiment of the present disclosure provides a viewing angle adjustment grating 4 on the side of the mesh-shaped touch electrode 31 facing away from the display layer 2. The vertical projection of the viewing angle adjustment grating 4 onto the substrate 1 overlaps with the vertical projection of at least a portion of the mesh-shaped touch electrode 31 onto the substrate 1. The viewing angle adjustment grating 4 blocks the light emitted from the sub-pixels 21 in the display layer 2, thereby achieving the purpose of privacy protection and reducing the viewing angle of the display panel 100. There is no need to add an additional privacy film, which simplifies the manufacturing process, reduces production costs, and reduces the number of film layers in the display device, facilitating a thinner and lighter display device. It also avoids the problem of the privacy film being easily damaged, rendering it ineffective in privacy protection.

[0054] In some embodiments, in conjunction with Figures 1 and 2, the viewing angle adjustment grating 4 and the grid-shaped touch electrode 31 are photolithographically formed simultaneously.

[0055] Figure 3 is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of this disclosure. As shown in Figure 3, the method for manufacturing a display panel includes:

[0056] S101, Forming a substrate.

[0057] Specifically, as shown in FIG4, the substrate 1 can be, for example, a flexible substrate or a rigid substrate, for supporting and protecting the film layer located thereon. The material of the substrate 1 is not specifically limited in the embodiments of this disclosure.

[0058] S102. A display layer is formed on one side of the substrate, and the display layer includes multiple sub-pixels.

[0059] Specifically, as shown in FIG5, sub-pixels 21 may include, for example, red sub-pixels 21, green sub-pixels 21, and blue sub-pixels 21. The areas of sub-pixels 21 of different colors may be the same or different, and this embodiment of the present disclosure does not limit this. In addition, the display layer 2 may include, for example, a driving circuit layer and a light-emitting element layer, and this embodiment of the present disclosure does not limit the specific film layer configuration of the display layer.

[0060] For example, after forming the display layer, the process further includes forming an encapsulation layer, a wiring structure, and an insulating layer in sequence.

[0061] As shown in Figure 6, an encapsulation layer 7 can be formed on the side of the display layer 2 away from the substrate 1 to isolate water and oxygen, ensuring that the sub-pixel 21 is not affected by moisture and oxygen, thereby improving the stability and lifespan of the sub-pixel 21.

[0062] As shown in Figures 7 and 8, a wiring layer 321 is first formed on the side away from the encapsulation layer 7. A transparent photoresist layer 60 is then formed on the side of the wiring layer 321 away from the display layer 2. The transparent photoresist layer 60 may be a positive photoresist. A mask 9 with a specific shape is used to pattern the transparent photoresist layer 60. In Figure 7, the filled pattern areas represent the opaque areas of the mask 9, while the other areas are transparent. Solid arrows represent illumination. After exposure and development, the transparent photoresist layer 60 corresponding to the opaque areas is not exposed to light and will not be dissolved by the developer. The pattern obtained by the transparent photoresist layer 60 is the same as the pattern of the mask 9. The wiring layer 321 is etched using an etchant. The wiring layer 321 located between the transparent photoresist layer 60 and the display layer 2 is preserved, while the wiring layers 321 in other locations are etched. The touch material layer 33 is etched using an etching solution. The wiring layer 321 located between the transparent photoresist layer 60 and the display layer 2 is retained, while the wiring layers 321 at other locations are etched, and the transparent photoresist layer 60 is peeled off, thereby forming the wiring structure 32 as shown in Figure 9.

[0063] As shown in Figure 10, an insulating layer 5 is formed on the side of the encapsulation layer 7 opposite to the display layer 2, and a via 30 is provided in the insulating layer 5.

[0064] S103. A touch material layer is formed on the side of the display layer away from the substrate.

[0065] For example, as shown in FIG11, a touch material layer 33 is formed on the side of the insulating layer 5 opposite to the display layer 2 to realize the touch function of the display panel 100.

[0066] S104. A photoresist layer is formed on the side of the touch material layer opposite to the display layer, and the photoresist layer is exposed to form a photoresist pattern.

[0067] S105, At least a partial grid-shaped touch electrode is formed by developing a photoresist pattern.

[0068] Specifically, as shown in Figure 12, a photoresist layer 6 is formed on the side of the touch material layer 33 opposite to the display layer 2. For example, a layer of photoresist can be coated on the surface of the touch material layer 33.

[0069] Photoresist, also known as photoresist, is a photosensitive liquid mixture composed of three main components: photosensitive resin, sensitizer, and solvent. Photoresist should have relatively low surface tension to ensure good flowability and coverage. When exposed to light, the photosensitive resin undergoes a rapid photocuring reaction in the exposed area, causing significant changes in the material's physical properties, particularly its solubility and affinity. Based on their chemical reaction mechanism and development principle, photoresists can be classified into negative and positive photoresists. Negative photoresists form insoluble substances after light exposure; conversely, positive photoresists are insoluble in certain solvents but become soluble after light exposure.

[0070] In some embodiments, the photoresist layer 6 may be formed of a positive photoresist, which may include positive photoresist such as polymethyl methacrylate positive photoresist, epoxy resin positive photoresist, polystyrene positive photoresist, and polystyrene positive photoresist. The specific composition of the positive photoresist is not limited in the embodiments of this disclosure.

[0071] In other embodiments, the photoresist layer 6 may be formed using a negative photoresist, which may include negative photoresist such as polyester and cyclic rubber. The specific composition of the negative photoresist is not limited in the embodiments of this disclosure.

[0072] Since the photoresist layer 6 used in this embodiment needs to block light so that the display panel 100 can achieve the effect of privacy protection, it is necessary to dope the photoresist with materials such as carbon black to form a black photoresist layer 6 to achieve privacy protection. The black photoresist layer 6 has advantages such as good UV protection, high resolution, high durability, and high precision, which can meet the needs of producing high-precision optical devices.

[0073] Referring to Figures 13 and 15, taking positive photoresist as an example, the arrows in Figure 13 represent light exposure. A mask 9 with a certain shape is used to pattern the black photoresist. The mask 9 includes transparent and opaque areas. The areas with filled patterns in Figure 13 are opaque areas, and the other areas are transparent areas. Utilizing the characteristics of positive photoresist, the black photoresist layer 6 corresponding to the transparent areas is dissolved by the developer after being exposed to light, thereby exposing the touch material layer 33 that needs to be etched near the substrate 1. The black photoresist layer 6 corresponding to the opaque areas is not exposed to light and will not be dissolved by the developer. The pattern obtained by the black photoresist layer 6 is the same as the pattern of the mask 9.

[0074] The touch material layer 33 in Figure 15 is etched using an etching solution. The touch material layer 33 located between the black photoresist layer 6 and the display layer 2 is retained, while the touch material layers 33 at other locations are etched, thereby forming a grid-like touch electrode 31 as shown in Figure 16.

[0075] Referring to Figures 14 and 15, taking the use of negative photoresist for black photoresist as an example, a mask 9 with a certain shape is used to pattern the black photoresist. The mask 9 includes transparent areas and opaque areas. In Figure 25, the areas with filled patterns are opaque areas, and the other areas are transparent areas. Utilizing the characteristics of negative photoresist, the black photoresist layer 6 corresponding to the transparent areas undergoes a cross-linking reaction after being exposed to light to form insoluble substances. The black photoresist layer 6 corresponding to the opaque areas is not exposed to light and is dissolved by the developer. The pattern obtained by the black photoresist layer 6 is complementary to the pattern of the mask 9.

[0076] The touch material layer 33 in Figure 15 is etched using an etching solution. The touch material layer 33 located between the black photoresist layer 6 and the display layer 2 is retained, while the touch material layers 33 in other locations are etched. Thus, the touch material layer 33 in Figure 15 forms a grid-like touch electrode 31 as shown in Figure 16.

[0077] S106. Retain at least a portion of the photoresist pattern as a viewing angle adjustment grating.

[0078] Thus, the touch material layer forms a grid-like touch electrode 31, and the remaining black photoresist serves as a viewing angle adjustment grating 4. Since the viewing angle adjustment grating 4 is formed of black photoresist, it can block light, thereby achieving a privacy protection effect. Referring to Figure 2, after the viewing angle adjustment grating 4 is formed, a planarization layer 8 is then formed to achieve planarization of the display panel 100.

[0079] Thus, the viewing angle adjustment grating 4 and the grid-shaped touch electrode 31 are formed simultaneously by photolithography. The viewing angle adjustment grating 4, which has the function of blocking light, replaces the conventional photoresist that does not have the function of blocking light and needs to be peeled off after photolithography. On the one hand, after the grid-shaped touch electrode 31 is prepared, there is no need to peel off the viewing angle adjustment grating 4, which simplifies the manufacturing process of the display panel 100 and reduces the production cost. On the other hand, the viewing angle adjustment grating 4, which is made of black photoresist, blocks light and plays a role in preventing privacy.

[0080] It should be noted that the viewing angle adjustment grating 4 can also be made of other materials with light-shielding effects, which can be photolithographically formed synchronously with the grid-shaped touch electrode 31 and can block light. This disclosure does not specifically limit this aspect.

[0081] Figure 17 is a partially enlarged top view of another display panel provided in an embodiment of the present disclosure. In some embodiments, in conjunction with Figures 1, 2 and 17, the viewing angle adjustment grating 4 is in the form of a grid, and the vertical projection of the viewing angle adjustment grating 4 onto the substrate 1 covers the vertical projection of the grid-shaped touch electrode 31 onto the substrate 1.

[0082] Figure 17 exemplarily shows that the viewing angle adjustment grating 4 and the grid-shaped touch electrode 31 have the same shape, both being grid-shaped. Exemplarily, during the fabrication process, a grid-shaped mask can be used to pattern the black photoresist forming the viewing angle adjustment grating 4. After exposure and development, the grid-shaped viewing angle adjustment grating 4 is formed. The touch material layer located on the side of the grid-shaped viewing angle adjustment grating 4 near the substrate layer is etched using an etching solution. The touch material layer located between the black photoresist and the display layer 2 is retained, while the touch material layers at other locations are etched, thereby forming the grid-shaped touch electrode 31.

[0083] In related technologies, the fabrication process for forming a grid-like touch electrode may include, for example, forming a photoresist layer on the side of the touch material layer facing away from the display layer. This photoresist layer can be made of ordinary photoresist material that does not have a light-shielding effect. After exposure, development, and etching, the residual photoresist layer is peeled off, leaving only the grid-like touch electrode. However, the viewing angle adjustment grating 4 provided in this embodiment, after being formed simultaneously with the grid-like touch electrode 31, does not need to be peeled off. The light-shielding performance of the viewing angle adjustment grating 4 provides a privacy protection effect, simplifies the fabrication process of the display panel 100, and reduces production costs.

[0084] Figure 18 is a partially enlarged top view of another display panel provided in an embodiment of the present disclosure, and Figure 19 is a partially enlarged top view of another display panel provided in an embodiment of the present disclosure. In some embodiments, referring to Figures 18 and 19, the display panel 100 includes a first side 10 and a second side 20, the first side 10 and the second side 20 having an included angle; the viewing angle adjustment grating 4 includes a first part 41, the extension direction of the first part 41 being parallel to the first side 10 or the second side 20.

[0085] For example, referring to Figures 18 and 19, the display panel 100 includes two first sides 10 and two second sides 20, with an angle of 90 degrees between the first sides 10 and the second sides 20. Taking the directions of Figures 18 and 19 as an example, the extension direction of the first side 10 is, for example, the pixel row direction, and the extension direction of the second side 20 is, for example, the pixel column direction.

[0086] In some embodiments, the method for fabricating the display panel includes retaining at least a portion of the photoresist pattern as a viewing angle adjustment grating, comprising:

[0087] A photoresist layer parallel to the first side of the display panel is peeled off to serve as a viewing angle adjustment grating; or, a photoresist layer parallel to the second side of the display panel is peeled off to serve as a viewing angle adjustment grating; wherein the first side and the second side have an included angle.

[0088] Specifically, as shown in Figures 18 and 19, after the photoresist layer and the mesh-shaped touch electrode 31 are formed by photolithography simultaneously, in order to adapt to the privacy protection requirements in different directions, the photoresist layer extending parallel to the first side 10 can be peeled off as needed to form the first part 41 of the viewing angle adjustment grating 4 extending parallel to the second side 20, or the photoresist layer 6 extending parallel to the second side 20 can be peeled off to form the first part 41 of the viewing angle adjustment grating 4 extending parallel to the first side 10.

[0089] Figures 18 and 19 distinguish the viewing angle adjustment grating 4 and the grid-shaped touch electrode 31 using different filling patterns. Figure 18 exemplarily shows that the extension direction of the first part 41 of the viewing angle adjustment grating 4 is parallel to the first side 10, enabling privacy protection in the direction perpendicular to the first side 10. Figure 19 exemplarily shows that the extension direction of the first part 41 of the viewing angle adjustment grating 4 is parallel to the second side 20, enabling privacy protection in the direction perpendicular to the second side 20. Figures 18 and 19 exemplarily show that the areas of each sub-pixel 21 in the display layer 2 are equal. It is understood that the areas of each sub-pixel 21 in the display layer 2 may also be unequal, and this disclosure does not limit this aspect.

[0090] Therefore, by retaining the viewing angle adjustment grating 4 whose extension direction is parallel to the first side 10 or retaining the viewing angle adjustment grating 4 whose extension direction is parallel to the second side 20, the viewing angle adjustment grating 4 can play a peeping prevention role in a specific direction, meet different peeping prevention needs of users, and improve the user experience.

[0091] It should be noted that the included angle between the first side 10 and the second side 20 can be other angles, for example, and this embodiment does not limit this.

[0092] It should be noted that the peeling method can be, for example, ultrasonic peeling, chemical peeling or mechanical peeling, depending on the actual manufacturing process of the display panel 100. This embodiment does not limit this method.

[0093] Figure 20 is a partially enlarged top view of another display panel provided in an embodiment of the present disclosure; Figure 21 is a partially enlarged top view of another display panel provided in an embodiment of the present disclosure; and Figure 22 is a cross-sectional view of another display panel provided in an embodiment of the present disclosure. In some embodiments, in conjunction with Figures 20 to 22, the viewing angle adjustment grating 4 further includes a second part 42, the vertical projection of the second part 42 on the substrate 1 overlapping with the vertical projection portion of the sub-pixel 21 on the substrate 1.

[0094] Figure 22 can be a cross-sectional view along the AA' direction in Figure 20, or a cross-sectional view along the BB' direction in Figure 21. The dashed arrows in Figure 22 represent light rays that are blocked by the viewing angle adjustment grating 4 and fail to be emitted, while the solid arrows represent light rays that can be emitted from the display panel 100.

[0095] When the area of ​​sub-pixel 21 is large, the privacy protection effect of the viewing angle adjustment grating 4 including only the first part 41 is limited. Therefore, in this embodiment, the viewing angle adjustment grating 4 also includes a second part 42. As shown in Figure 22, the visible range when the viewing angle adjustment grating 4 includes only the first part 41 is larger than the visible range when the viewing angle adjustment grating 4 includes both the first part 41 and the second part 42. Figure 22 exemplarily shows that when the viewing angle adjustment grating 4 includes only the first part 41, the angle between the light emitted from the display layer 2 and the direction parallel to the substrate 1 is, for example, α1. When the viewing angle adjustment grating 4 includes both the first part 41 and the second part 42, the angle between the light emitted from the display layer 2 and the direction parallel to the substrate 1 is, for example, α2. The light emitted at a large angle will be blocked by the second part, making α2 greater than α1. Thus, the second part 42 can block the light from escaping to the periphery of the display panel 100, and the user can only see the content displayed on the display panel 100 from a closer viewing angle.

[0096] Taking the direction in Figure 20 as an example and combining it with the visible range in Figure 22, it can be seen that the second part 42 set in Figure 20 blocks the light emitted by the sub-pixel 21 from scattering in the vertical direction of the display panel 100. Taking the direction in Figure 21 as an example and combining it with the visible range in Figure 22, it can be seen that the second part 42 set in Figure 21 blocks the light emitted by the sub-pixel 21 from scattering in the horizontal direction of the display panel 100. This can improve the privacy protection effect of the display panel 100, making it less likely for other users around the display panel 100 to see the content displayed on the display panel 100. Figures 20 and 21 exemplarily show that the areas of each sub-pixel 21 in the display layer 2 are equal. It can be understood that the areas of each sub-pixel 21 in the display layer 2 may not be equal, and this embodiment of the present disclosure does not limit this. In addition, Figures 20 and 21 exemplarily show that a second part 42 is provided on the side of some sub-pixels 21 facing away from the substrate 1. Alternatively, the second part 42 can be provided on the side of all sub-pixels 21 facing away from the substrate 1 in the display panel 100. The configuration can be made according to the privacy requirements of the display panel 100. This disclosure does not limit the specific implementation of the embodiments.

[0097] Therefore, by using the second part 42, which overlaps with the vertical projection on the substrate 1 and the vertical projection of the sub-pixel 21 on the substrate 1, the angle between the light emitted from the display layer 2 and the direction parallel to the substrate 1 can be increased, thereby reducing the viewing range of the display panel 100 and increasing the difficulty for users to view the display content of the display panel 100 from the side view angle, thus further improving the privacy protection effect.

[0098] In some embodiments, referring to Figures 20 and 21, the extension direction of the second part 42 is parallel to the extension direction of the first part 41.

[0099] Figure 20 exemplarily illustrates a first part 41 extending parallel to the first side 10. A second part 42 is also provided between adjacent first parts 41. Referring to Figure 22, in the direction perpendicular to the first side 10, when the viewing angle adjustment grating 4 only includes the first part 41, the angle α1 between the light emitted from the display layer 2 in the direction perpendicular to the first side 10 and the direction parallel to the substrate 1 is [not specified]. With the viewing angle adjustment grating 4 including the first part 41 and the second part 42, the angle α2 between the light emitted from the display layer 2 in the direction perpendicular to the first side 10 and the direction parallel to the substrate 1 is [not specified]. The density of the viewing angle adjustment grating 4 increases so that α2 is greater than α1. Taking the direction in Figure 20 as an example, and referring to Figure 22, it can be seen that when a user views the display panel 100 from bottom to top or from top to bottom, the user's viewing angle should be close to the direction perpendicular to the substrate 1 to see the content displayed on the display panel 100, reducing the visible range of the display panel 100. Therefore, the display panel 100 provided in this embodiment has excellent privacy protection.

[0100] Figure 21 exemplarily illustrates a first part 41 extending parallel to the second side 20. A second part 42 is also provided between adjacent first parts 41. Referring to Figure 22, in the direction perpendicular to the second side 20, when the viewing angle adjustment grating 4 only includes the first part 41, the angle α1 between the light emitted from the display layer 2 in the direction perpendicular to the second side 20 and the direction parallel to the substrate 1 is [not specified]. With the viewing angle adjustment grating 4 including the first part 41 and the second part 42, the angle α2 between the light emitted from the display layer 2 in the direction perpendicular to the second side 20 and the direction parallel to the substrate 1 is [not specified]. The density of the viewing angle adjustment grating 4 increases so that α2 is greater than α1. Taking the direction in Figure 21 as an example, and referring to Figure 22, it can be seen that when a user views the display panel 100 from left to right or from right to left, the user's viewing angle should be close to the direction perpendicular to the substrate 1 to see the content displayed on the display panel 100, reducing the visible range of the display panel 100. Therefore, the display panel 100 provided in this embodiment has excellent privacy protection.

[0101] Figure 23 is a partially enlarged top view of another display panel provided in an embodiment of the present disclosure, and Figure 24 is a partially enlarged top view of another display panel provided in an embodiment of the present disclosure. In some embodiments, referring to Figures 23 and 24, the extending direction of the second part 42 forms an angle with the extending direction of the first part 41.

[0102] Figures 23 and 24 exemplarily show that the extension direction of the first part 41 is parallel to the first side 10, and the extension direction of the second part 42 is at an angle to the extension direction of the first part 41. Taking the direction of Figure 23 as an example, the second part 42 can block the light emitted by the sub-pixel 21 from diverging towards the upper left and lower right corners of the display panel 100, thus achieving privacy protection in the upper left and lower right corners of the display panel 100. Taking the direction of Figure 24 as an example, the second part 42 can block the light emitted by the sub-pixel 21 from diverging towards the lower left and upper right corners of the display panel 100, thus achieving privacy protection in the lower left and upper right corners of the display panel 100.

[0103] Furthermore, since the extension direction of the second part 42 is at an angle to the extension direction of the first part 41, the second part 42 has components in both the direction parallel to the first side 10 and the direction parallel to the second side 20. Therefore, the density of the viewing angle adjustment grating 4 of the second part 42 in both the direction parallel to the first side 10 and the direction parallel to the second side 20 can be increased, thereby improving the privacy protection effect of the display panel 100.

[0104] It should be noted that the angle between the extension direction of the second part 42 and the extension direction of the first part 41 can be set according to the actual privacy requirements of the display panel 100. This embodiment does not limit this. When the extension direction of the first part 41 is parallel to the second side 20, the extension direction of the second part 42 and the extension direction of the first part 41 can also be set to have an angle with each other, referring to the above embodiment. This will not be elaborated here.

[0105] Figure 25 is a partial top view of another display panel provided in an embodiment of the present disclosure; Figure 26 is an enlarged view of region Q in Figure 25; Figure 27 is a cross-sectional view of another display panel provided in an embodiment of the present disclosure; Figure 28 is a partial top view of another display panel provided in an embodiment of the present disclosure; and Figure 29 is an enlarged view of region P in Figure 28. In some embodiments, in conjunction with Figures 25 to 29, the viewing angle adjustment grating 4 corresponding to the same color sub-pixel 21 has the same vertical projection area on the substrate 1.

[0106] Specifically, referring to Figures 25 to 29, since the luminous efficiency and lifespan of different color sub-pixels 21 are different, and according to the color requirements presented by the display panel 100, the luminous area of ​​different color sub-pixels 21 can be set to be different.

[0107] Figures 25 and 26 exemplarily show that the viewing angle adjustment grating 4 is, for example, in a grid shape, and the viewing angle adjustment grating 4 is located between adjacent sub-pixels 21. The sub-pixels 21 may include, for example, a first color sub-pixel 211, a second color sub-pixel 212, and a third color sub-pixel 213. Figure 27 shows that the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to the first color sub-pixel 211 on the substrate 1 is larger than the area of ​​the viewing angle adjustment grating 4 corresponding to the second color sub-pixel 212. The distance h1 between the viewing angle adjustment grating 4 corresponding to the first color sub-pixel 211 and the first color sub-pixel is smaller than the distance h2 between the viewing angle adjustment gratings 4 corresponding to the second color sub-pixel 212. The visible range corresponding to the first color sub-pixel 211 is smaller than the visible range corresponding to the second color sub-pixel 212, that is, the light emission of the first color sub-pixel 211 is smaller than the light emission of the second color sub-pixel 212. Therefore, in order to ensure that the display panel 100 does not have a color shift problem, it is necessary to ensure that the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to the same color sub-pixel 21 on the substrate 1 is the same, so that the amount of light attenuated after the same color sub-pixel 21 is blocked by the viewing angle adjustment grating 4 is the same, and to avoid the same color sub-pixel 21 having different light attenuation in different areas, thus avoiding the color shift problem.

[0108] To clearly illustrate the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to sub-pixel 21 on substrate 1, the area of ​​the first part 41 of the viewing angle adjustment grating 4 located between two adjacent sub-pixels 21 can be divided into two parts, and the area of ​​the first part 41 of the viewing angle adjustment grating 4 located between three adjacent sub-pixels 21 can be divided into three parts. Taking Figure 26 as an example, the area of ​​the first part 41 of the viewing angle adjustment grating 4 corresponding to the first color sub-pixel 211 is the area of ​​region A in Figure 26, the area of ​​the viewing angle adjustment grating 4 corresponding to the second color sub-pixel 212 is the area of ​​region B in Figure 26, and the area of ​​the viewing angle adjustment grating 4 corresponding to the third color sub-pixel 213 is the area of ​​region C in Figure 26.

[0109] To ensure that the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to the same color sub-pixel 21 on the substrate 1 is the same, the area of ​​the first part 41 of the viewing angle adjustment grating 4 corresponding to each first color sub-pixel 211 in the display panel 100 is the area of ​​region A in Figure 26, the area of ​​the first part 41 of the viewing angle adjustment grating 4 corresponding to each second color sub-pixel 212 in the display panel 100 is the area of ​​region B in Figure 26, and the area of ​​the first part 41 of the viewing angle adjustment grating 4 corresponding to each third color sub-pixel 213 in the display panel 100 is the area of ​​region C in Figure 26.

[0110] Figures 28 and 29 exemplarily show that the viewing angle adjustment grating 4 includes a first part 41 and a second part 42. The vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to the sub-pixel 21 on the substrate 1 is the sum of the area of ​​the first part 41 and the area of ​​the second part 42 that overlaps with the vertical projection portion of the sub-pixel 21 on the substrate 1. The division method of the area of ​​the first part 41 between adjacent sub-pixels 21 can be referred to Figure 26, and will not be repeated here.

[0111] Taking Figure 29 as an example, the area of ​​the viewing angle adjustment grating 4 corresponding to the first color sub-pixel 211 is the sum of the area of ​​region D in Figure 29 and the area of ​​the second part 42 overlapping with the vertical projection of the first color sub-pixel 211 on the substrate 1. The area of ​​the viewing angle adjustment grating 4 corresponding to the second color sub-pixel 212 is the sum of the area of ​​region E in Figure 29 and the area of ​​the second part 42 overlapping with the vertical projection of the second color sub-pixel 212 on the substrate 1. The area of ​​the viewing angle adjustment grating 4 corresponding to the third color sub-pixel 213 is the sum of the area of ​​region F in Figure 29 and the area of ​​the second part 42 overlapping with the vertical projection of the third color sub-pixel 213 on the substrate 1.

[0112] To ensure that the vertical projection areas of the viewing angle adjustment grating 4 corresponding to the same color sub-pixel 21 on the substrate 1 are the same, the area of ​​the first part 41 of the viewing angle adjustment grating 4 corresponding to each first color sub-pixel 211 in the display panel 100 is the sum of the area of ​​region D in Figure 29 and the area of ​​the second part 42 overlapping with the vertical projection of the first color sub-pixel 211 on the substrate 1. Similarly, the area of ​​the first part 41 of the viewing angle adjustment grating 4 corresponding to each second color sub-pixel 212 in the display panel 100 is the sum of the area of ​​region E in Figure 29 and the area of ​​the second color sub-pixel 212 overlapping with the vertical projection of the first color sub-pixel 211 on the substrate 1. The sum of the areas of the second part 42 overlapping the vertical projection portion of the third color sub-pixel 212 on the substrate 1, and the area of ​​the first part 41 of the viewing angle adjustment grating 4 corresponding to each third color sub-pixel 213 in the display panel 100, are both the area of ​​region F in Figure 29 and the area of ​​the second part 42 overlapping the vertical projection portion of the third color sub-pixel 213 on the substrate 1. This ensures that the amount of light attenuated by the same color sub-pixel 21 after being blocked by the viewing angle adjustment grating 4 is the same, avoiding the problem of color shift caused by different light attenuation in different areas of the same color sub-pixel 21.

[0113] It should be noted that the specific size relationship of the areas of different color sub-pixels 21 is not limited to that shown in the accompanying drawings of the embodiments of this disclosure, and can also be set according to the actual usage requirements of the display panel 100. The embodiments of this disclosure do not limit this.

[0114] In some embodiments, as shown in FIG2, the height of the viewing angle adjustment grating 4 corresponding to the same color sub-pixel 21 is the same along the direction perpendicular to the substrate 1.

[0115] Specifically, the sub-pixels 21 shown in Figure 2 are, for example, sub-pixels of the same color. Due to the different heights of the viewing angle adjustment grating 4, the blocking effect on the light emitted from the display layer 2 is different. For example, the higher the height of the viewing angle adjustment grating 4, the larger the angle between the light emitted from the display layer 2 and the direction parallel to the substrate 1, and the smaller the light emission of the corresponding sub-pixel 21. Therefore, in order to ensure that the display panel 100 does not have a color shift problem before and after the viewing angle adjustment grating 4 blocks the light, the height of the viewing angle adjustment grating 4 corresponding to the same color sub-pixels 21 is set to be the same along the direction perpendicular to the substrate 1. After the same color sub-pixels 21 are blocked by the viewing angle adjustment grating 4, the attenuation ratio of the light emission is the same. This avoids the difference in the height of the viewing angle adjustment grating 4 corresponding to the same color sub-pixels 21 at different positions, which would cause the light emission of the same color sub-pixels 21 to be different after being blocked by the viewing angle adjustment grating 4, causing the display panel 100 to have a color shift problem, thus improving the display effect of the display panel 100.

[0116] In some embodiments, referring to Figures 25 to 29, the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to sub-pixels 21 of different areas on the substrate 1 is different; wherein, the vertical projection area of ​​the viewing angle adjustment grating 4 on the substrate 1 is positively correlated with the area of ​​the corresponding sub-pixel 21.

[0117] As shown in Figure 27, the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to different colored sub-pixels 21 on the substrate 1 is different, the visible range of different colored sub-pixels 21 is different, and the amount of light emitted by different colored sub-pixels 21 is also different. In order to ensure that the display panel 100 does not have a color shift problem before and after the viewing angle adjustment grating 4 blocks the light, it is necessary to ensure that the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to different areas of sub-pixels 21 on the substrate 1 is different, so that the attenuation ratio of the amount of light emitted by sub-pixels 21 of different areas after being blocked by the viewing angle adjustment grating 4 is the same, thus avoiding the color shift problem.

[0118] For example, referring to Figures 25 to 29, the display layer 2 may include a first color sub-pixel 211, a second color sub-pixel 212, and a third color sub-pixel 213, wherein the area of ​​the first color sub-pixel 211 is larger than the area of ​​the second color sub-pixel 212, and the area of ​​the second color sub-pixel 212 is larger than the area of ​​the third color sub-pixel 213. As can be seen from Figure 27 and the analysis of the above embodiments, the larger the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to sub-pixel 21 on the substrate 1, the smaller the visible range corresponding to sub-pixel 21, and the greater the attenuation of the amount of light emitted by sub-pixel 21. In order to make the attenuation ratio of the amount of light emitted by sub-pixels 21 of different areas the same, the larger the area of ​​sub-pixel 21, the larger the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to sub-pixel 21 on the substrate 1.

[0119] For example, the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to the first color sub-pixel 211 on the substrate 1 is set to be larger than the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to the second color sub-pixel 212 on the substrate 1, and the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to the second color sub-pixel 212 on the substrate 1 is larger than the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to the third color sub-pixel 213 on the substrate 1. The specific division method of the vertical projection area of ​​the viewing angle adjustment grating 4 on the substrate 1 can be referred to the above embodiment, and will not be repeated in this embodiment.

[0120] Figure 30 is a cross-sectional structural diagram of another display panel provided in an embodiment of the present disclosure, and Figure 31 is a cross-sectional structural diagram of another display panel provided in an embodiment of the present disclosure. In some embodiments, in conjunction with Figures 30 and 31, along the direction perpendicular to the substrate 1, the height of the viewing angle adjustment grating 4 corresponding to sub-pixels 21 of different areas is different; wherein, the height of the viewing angle adjustment grating 4 is positively correlated with the area of ​​the corresponding sub-pixel 21.

[0121] Specifically, referring to Figures 30 and 31, the higher the height of the viewing angle adjustment grating 4, the larger the angle between the light emitted from the display layer 2 and the direction parallel to the substrate 1, and the smaller the light emission of the corresponding sub-pixel 21. In order to ensure that the display panel 100 does not have a color shift problem before and after the viewing angle adjustment grating 4 blocks the light, it is necessary to ensure that the height of the viewing angle adjustment grating 4 corresponding to different color sub-pixels 21 is different along the direction perpendicular to the substrate 1, so that the attenuation ratio of the amount of light emitted by different color sub-pixels 21 after being blocked by the viewing angle adjustment grating 4 is the same, thus avoiding the color shift problem.

[0122] For example, as shown in FIG30, the display layer 2 may include a first color sub-pixel 211, a second color sub-pixel 212, and a third color sub-pixel 213. The area of ​​the first color sub-pixel 211 is larger than the area of ​​the second color sub-pixel 212, and the area of ​​the second color sub-pixel 212 is larger than the area of ​​the third color sub-pixel 213. In order to make the attenuation ratio of the amount of light emitted by different color sub-pixels 21 the same, the height of the viewing angle adjustment grating 4 corresponding to the first color sub-pixel 211 in the direction perpendicular to the substrate 1 is set to be greater than the height of the viewing angle adjustment grating 4 corresponding to the second color sub-pixel 212 in the direction perpendicular to the substrate 1, and the height of the viewing angle adjustment grating 4 corresponding to the second color sub-pixel 212 in the direction perpendicular to the substrate 1 is greater than the height of the viewing angle adjustment grating 4 corresponding to the third color sub-pixel 213 in the direction perpendicular to the substrate 1.

[0123] Referring to Figure 30, the height of the viewing angle adjustment grating 4 corresponding to the first color sub-pixel 211 along the direction perpendicular to the substrate 1 can be, for example, (L3+L4) / 2; the height of the viewing angle adjustment grating 4 corresponding to the second color sub-pixel 212 along the direction perpendicular to the substrate 1 can be, for example, (L2+L3) / 2; and the height of the viewing angle adjustment grating 4 corresponding to the third color sub-pixel 213 along the direction perpendicular to the substrate 1 can be, for example, (L1+L2) / 2. In this embodiment, (L3+L4) / 2 is set to be greater than (L2+L3) / 2, and (L2+L3) / 2 is greater than (L1+L2) / 2, so as to ensure that the attenuation ratio of the amount of light emitted by different color sub-pixels 21 after being blocked by the viewing angle adjustment grating 4 is the same, thus avoiding the problem of color shift.

[0124] For example, as shown in FIG31, when the viewing angle adjustment grating 4 includes, for example, a first part 41 and a second part 42, the height of the first part 41 located between different color sub-pixels 21 can be set to be the same, that is, the sizes of L1', L2', L3' and L4' are the same. The height L7 of the second part 42 corresponding to the first color sub-pixel 211 along the direction perpendicular to the substrate 1 is set to be greater than the height L6 of the second part 42 corresponding to the second color sub-pixel 212 along the direction perpendicular to the substrate 1, and the height L6 of the second part 42 corresponding to the second color sub-pixel 212 along the direction perpendicular to the substrate 1 is greater than the height L5 of the second part 42 corresponding to the third color sub-pixel 213 along the direction perpendicular to the substrate 1.

[0125] Alternatively, the height of the first part 41 located between different color sub-pixels 21 can be set to be different, that is, the sizes of L1', L2', L3' and L4' are different. The height of the viewing angle adjustment grating 4 corresponding to the first color sub-pixel 211 along the direction perpendicular to the substrate 1 can be, for example, (L3'+L4'+L7) / 2; the height of the viewing angle adjustment grating 4 corresponding to the second color sub-pixel 212 along the direction perpendicular to the substrate 1 can be, for example, (L2'+L3'+L6) / 2; and the height of the viewing angle adjustment grating 4 corresponding to the third color sub-pixel 213 along the direction perpendicular to the substrate 1 can be, for example, (L1'+L2'+L5) / 2. In this embodiment, (L3'+L4'+L7) / 2 is set to be greater than (L2'+L3'+L6) / 2, and (L2'+L3'+L6) / 2 is greater than (L1'+L2'+L5) / 2, so as to ensure that the attenuation ratio of the amount of light emitted by different color sub-pixels 21 after being blocked by the viewing angle adjustment grating 4 is the same, thereby avoiding the color shift problem of the display panel 100.

[0126] In some embodiments, taking the directions in Figures 25, 26, 28, and 29 as examples, to achieve a privacy protection effect in the left-right direction, the height of the viewing angle adjustment grating 4 extending in the up-down direction can be increased, while the height of the viewing angle adjustment grating 4 extending in the left-right direction can be relatively decreased. Similarly, to achieve a privacy protection effect in the up-down direction, the height of the viewing angle adjustment grating 4 extending in the left-right direction can be increased, while the height of the viewing angle adjustment grating 4 extending in the up-down direction can be relatively decreased.

[0127] In some embodiments, in conjunction with Figures 1, 2, 16, 22, 27, 30, and 31, the touch layer 3 further includes a wiring structure 32; the wiring structure 32 may be located, for example, on the side of the mesh-shaped touch electrode 31 facing the substrate 1; an insulating layer 5 is disposed between the wiring structure 32 and the mesh-shaped touch electrode 31, and they are electrically connected through a via 30 penetrating the insulating layer 5.

[0128] Specifically, referring to Figures 1, 2, 16, 22, 27, 30, and 31, the wiring structure 32 is used to transmit touch driving signals to the mesh-shaped touch electrode 31, or to transmit touch sensing signals to the touch chip, so that the touch chip can understand the touch position and / or the touch pressure, thereby realizing the touch function of the display panel 100. Figure 1 shows an example of the lead-out of the wiring structure 32, for example, it can be electrically connected to the control chip in the non-touch area. The wiring structure 32 and the mesh-shaped touch electrode 31 are disposed in different layers, and an insulating layer 5 is provided between the wiring structure 32 and the mesh-shaped touch electrode 31. A via 30 is provided on the insulating layer 5 so that the wiring structure 32 and the mesh-shaped touch electrode 31 are electrically connected through the via 30. Thus, by distributing the wiring structure 32 and the mesh-shaped touch electrode 31 in different layers, the problem of short circuit between the wiring structure 32 and the mesh-shaped touch electrode 31 is avoided, which helps to simplify the wiring difficulty of the touch layer 3.

[0129] In some embodiments, referring to Figures 1 and 2, the wiring structure 32 is in the form of a mesh, and the vertical projection of the wiring structure 32 on the substrate 1 overlaps with the vertical projection of the mesh-shaped touch electrode 31 on the substrate 1.

[0130] Specifically, referring to Figures 1 and 2, the material of the touch layer 3 can be, for example, a metallic material such as molybdenum, aluminum, titanium, or aluminum or titanium, which can be set according to the actual usage requirements of the display panel 100. This embodiment does not limit this. Since both the wiring structure 32 and the grid-shaped touch electrode 31 are made of metallic materials, in order to reduce the resistance of the touch layer 3, the wiring structure 32 can also be set to be grid-shaped, and the vertical projection of the wiring structure 32 on the substrate 1 overlaps with the vertical projection of the grid-shaped touch electrode 31 on the substrate 1. That is, the grid-shaped wiring structure 32 is disposed between the grid-shaped touch electrode 31 and the substrate 1. As a result, the resistance of the touch layer 3 is greatly reduced, and the touch accuracy of the display panel 100 is improved.

[0131] Figure 32 is a cross-sectional view of another display panel provided in an embodiment of this disclosure. In some embodiments, as shown in Figure 32, the display layer 2 includes a driving circuit layer 22 and a light-emitting element layer 23; the driving circuit layer 22 includes a plurality of pixel driving circuits; the light-emitting element layer 23 includes a plurality of light-emitting units 24; the pixel driving circuits and the light-emitting units 24 are electrically connected in a one-to-one correspondence; the driving circuit layer 22 is located between the substrate 1 and the light-emitting element layer 23.

[0132] Specifically, as shown in Figure 32, a driving circuit layer 22 is also provided on one side of the substrate 1. The driving circuit layer 22 may include, for example, an array of pixel driving circuits. A pixel driving circuit refers to the smallest repeating unit of the circuit structure that drives the corresponding light-emitting element to emit light, such as a 2T1C circuit, a 7T1C circuit, a 7T2C circuit, etc. In this document, "2T1C circuit" refers to a pixel circuit that includes two thin-film transistors (T) and one capacitor (C). Other circuits such as "7T1C circuit" and "7T2C circuit" follow the same principle. The specific working principle is well known to those skilled in the art and will not be described in detail here. The film structure in the driving circuit layer 22 is not limited to the film structure shown in Figure 32, and this embodiment does not specifically limit it.

[0133] The display layer 2 also includes, for example, a light-emitting element layer 23, which is located on the side of the driving circuit layer 22 facing away from the substrate 1. The display panel 100 provided in this embodiment can be a display panel 100 using organic light-emitting diode (OLED) display technology, i.e., an OLED (Organic Light Emitting Diode) display panel 100. The light-emitting element layer 23 of the OLED display panel 100 includes multiple light-emitting units 24. For example, the sub-pixels 21 in Figures 1 to 31 can include the light-emitting units 24 in Figure 32. The basic structure of the light-emitting unit 24 includes an anode 241, a light-emitting material layer 242, and a cathode 243. When a suitable voltage is supplied, holes in the anode 241 and electrons in the cathode 243 combine in the light-emitting material layer 242 to generate light. The light-emitting unit 24 can emit different colors of light based on the different properties of the light-emitting material layer 242. Compared to thin-film transistor liquid crystal displays, the OLED display panel 100 has high visibility and high brightness, and is more energy-efficient, lighter, and thinner. Of course, in some other embodiments of this disclosure, the display panel 100 may also be a display panel 100 employing inorganic light-emitting diode display technology, such as a Micro LED display panel 100, or a Mini LED display panel 100, etc.

[0134] The display panel 100 provided in this embodiment achieves privacy protection by providing a viewing angle adjustment grating 4 on the side of the mesh-shaped touch electrodes 31 facing away from the display layer 2. The vertical projection of the viewing angle adjustment grating 4 onto the substrate 1 overlaps with the vertical projection of at least a portion of the mesh-shaped touch electrodes 31 onto the substrate 1. The viewing angle adjustment grating 4 blocks the light emitted from the sub-pixels 21 in the display layer 2, thereby reducing the viewing angle of the display panel 100. This eliminates the need for an additional privacy film, simplifying the manufacturing process of the display panel 100 and reducing production costs. Furthermore, it reduces the number of film layers in the display device, facilitating a thinner and lighter display, and avoiding the problem of a easily damaged privacy film that renders it ineffective.

[0135] Based on the same inventive concept, this disclosure also provides a display device, including a display panel as described in any of the above-described display panel embodiments. Therefore, this display device possesses the technical features of the display panel provided in this disclosure and can achieve the beneficial effects of the display panel provided in this disclosure. Similarities can be found in the above description of the display panel provided in this disclosure, and will not be repeated here.

[0136] For example, FIG33 is a schematic diagram of the structure of a display device provided in an embodiment of the present disclosure. As shown in FIG33, the display device provided in the embodiment of the present disclosure includes the display panel 100 provided in any of the above embodiments of the present disclosure. FIG33 only uses a mobile phone as an example to illustrate the display device. It can be understood that the display device provided in the embodiment of the present application can be any electronic product with display function, including but not limited to the following categories: mobile phone, television, laptop, desktop monitor, tablet computer, digital camera, smart bracelet, smart glasses, vehicle display, medical device, industrial control equipment, touch interactive terminal, etc. The embodiments of the present invention do not make any special limitations in this regard.

[0137] The display device provided in this disclosure includes the above-described display panel, and therefore can solve the same technical problems as the above-described display panel embodiments and achieve the same technical effects, which will not be repeated here.

[0138] This disclosure also provides a method for preparing a display panel, which can be used to prepare any of the display panels provided in the above embodiments and can achieve the corresponding beneficial effects. The similarities can be understood by referring to the explanation of the display panel above, and will not be repeated here.

[0139] The display panel, display device, and method for manufacturing the display panel provided in this disclosure include a substrate; a display layer located on one side of the substrate and including a plurality of sub-pixels; a touch layer located on the side of the display layer opposite to the substrate and including a grid-shaped touch electrode; and a viewing angle adjustment grating in contact with the side of the grid-shaped touch electrode opposite to the display layer. The vertical projection of the viewing angle adjustment grating onto the substrate overlaps with the vertical projection of at least a portion of the grid-shaped touch electrode onto the substrate. Thus, by providing a viewing angle adjustment grating on the side of the grid-shaped touch electrode opposite to the display layer, the viewing angle adjustment grating blocks the light emitted from the display layer, thereby achieving privacy protection and reducing the viewing angle of the display panel. This eliminates the need for an additional privacy film, simplifying the manufacturing process of the display panel and reducing the number of film layers in the display device, which is beneficial for making the display device thinner and lighter. It also avoids the problem that the privacy film attached to the display panel is easily damaged, and the display device cannot achieve its privacy protection effect if damaged.

[0140] Those skilled in the art will understand that the above embodiments are exemplary and not restrictive. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on a study of the drawings, specification, and claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other means or steps; "article" without the use of a quantifier is intended to include one or more articles and can be used interchangeably with "one or more articles"; the terms "first" and "second" are used to identify names and not to indicate any particular order. Any reference numerals in the claims should not be construed as limiting the scope of protection. The functionality of multiple parts appearing in the claims can be implemented by a single hardware or software module. The appearance of certain technical features in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A display panel, comprising: Substrate; A display layer is located on one side of the substrate, and the display layer includes a plurality of sub-pixels; A touch layer is located on the side of the display layer opposite to the substrate, and the touch layer includes a grid-like touch electrode. A viewing angle adjustment grating is provided, which contacts the side of the mesh-shaped touch electrode facing away from the display layer; the vertical projection of the viewing angle adjustment grating on the substrate overlaps with the vertical projection of at least a portion of the mesh-shaped touch electrode on the substrate.

2. The display panel according to claim 1, wherein, The viewing angle adjustment grating and the grid-shaped touch electrode are formed simultaneously by photolithography.

3. The display panel according to claim 2, wherein, The viewing angle adjustment grating is grid-shaped, and the vertical projection of the viewing angle adjustment grating onto the substrate covers the vertical projection of the grid-shaped touch electrode onto the substrate.

4. The display panel according to claim 1, wherein the display panel includes a first side and a second side, the first side and the second side having an included angle; the viewing angle adjustment grating includes a first part, the extension direction of the first part being parallel to the first side or the second side.

5. The display panel according to claim 4, wherein, The viewing angle adjustment grating also includes a second part, the vertical projection of the second part on the substrate overlapping the vertical projection portion of the sub-pixel on the substrate.

6. The display panel according to claim 5, wherein, The extension direction of the second part is parallel to the extension direction of the first part.

7. The display panel according to claim 5, wherein, The extension direction of the second part forms an angle with the extension direction of the first part.

8. The display panel according to claim 1, wherein, The viewing angle adjustment gratings corresponding to the same color sub-pixels have the same vertical projection area on the substrate.

9. The display panel according to claim 1, wherein, Along a direction perpendicular to the substrate, the height of the viewing angle adjustment grating corresponding to the same color sub-pixel is the same.

10. The display panel according to claim 1, wherein, The vertical projection area of ​​the viewing angle adjustment grating corresponding to the sub-pixels of different areas on the substrate is different; The vertical projection area of ​​the viewing angle adjustment grating on the substrate is positively correlated with the area of ​​the corresponding sub-pixel.

11. The display panel according to claim 1, wherein, Along a direction perpendicular to the substrate, the height of the viewing angle adjustment grating corresponding to sub-pixels of different areas is different; The height of the viewing angle adjustment grating is positively correlated with the area of ​​the corresponding sub-pixel.

12. The display panel according to claim 1, wherein, The touch layer also includes a wiring structure; the wiring structure is located on the side of the mesh-shaped touch electrode facing the substrate; an insulating layer is disposed between the wiring structure and the mesh-shaped touch electrode, and they are electrically connected through vias.

13. The display panel according to claim 12, wherein, The wiring structure is in the form of a grid, and the vertical projection of the wiring structure on the substrate overlaps with the vertical projection of the grid-shaped touch electrode on the substrate.

14. The display panel according to any one of claims 1-13, wherein, The display layer includes a driving circuit layer and a light-emitting element layer; the driving circuit layer includes multiple pixel driving circuits; the light-emitting element layer includes multiple light-emitting units; the pixel driving circuits and the light-emitting units are electrically connected in a one-to-one correspondence; the driving circuit layer is located between the substrate and the light-emitting element.

15. A display device comprising a display panel as described in any one of claims 1-14.

16. A method for manufacturing a display panel, comprising: Forming a substrate; A display layer is formed on one side of the substrate, the display layer comprising a plurality of sub-pixels; A touch material layer is formed on the side of the display layer opposite to the substrate; A photoresist layer is formed on the side of the touch material layer opposite to the display layer, and the photoresist layer is exposed to form a photoresist pattern. At least a partial grid-shaped touch electrode is formed by developing the photoresist pattern; At least a portion of the photoresist pattern is retained as a viewing angle adjustment grating.

17. The method for manufacturing a display panel according to claim 16, characterized in that, Retaining at least a portion of the photoresist pattern as a viewing angle adjustment grating includes: The photoresist layer parallel to the first edge of the display panel is peeled off to serve as a viewing angle adjustment grating; Alternatively, the photoresist layer parallel to the second side of the display panel can be peeled off to serve as a viewing angle adjustment grating; The first side and the second side form an angle.

Images