Display panel, display device and preparation method of display panel

Abstract

The invention relates to a display panel, a display device and a preparation method of the display panel. The display panel comprises a substrate; the display layer is located on one side of the substrate, and the display layer comprises a plurality of sub-pixels; the touch layer is located on the side, away from the substrate, of the display layer, and the touch layer comprises a latticed touch electrode; the visual angle adjusting grating is in contact with the face, away from the display layer, of the latticed touch electrode; and the vertical projection of the visual angle adjusting grating on the substrate is overlapped with the vertical projection of at least part of the latticed touch electrode on the substrate. According to the technical scheme, on the basis that the display panel is peep-proof, the preparation process of the display panel is simplified, and the production cost is reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display panel, a display device, and a method for manufacturing a display panel. Background Art

[0002] With the development of display technology, display devices such as mobile phones and computers have been increasingly widely used. Generally, display devices have a large viewing angle, and users at different viewing angles can all know the information displayed. However, in some scenarios, users hope that the information displayed by the display device cannot be known by other users around them, so they hope that the display device has an anti-peeping function.

[0003] In the related anti-peeping technology, generally after the display device is prepared, an anti-peeping film is attached to the surface of the display panel, or the grating is directly integrated into the display panel by adding a process on the display panel. The above methods have high production costs and complex processes. Summary of the invention

[0004] In order to solve the above technical problems, the present disclosure provides a display panel, a display device and a method for manufacturing a display panel, which simplifies the manufacturing process of the display panel and reduces the production cost on the basis of realizing anti-peeping of the display panel.

[0005] In a first aspect, the present disclosure provides a display panel, comprising:

[0006] substrate;

[0007] A display layer, the display layer is located on one side of the substrate, and the display layer includes a plurality of sub-pixels;

[0008] A touch layer, the touch layer is located on a side of the display layer away from the substrate, and the touch layer includes a grid-shaped touch electrode;

[0009] A viewing angle adjustment grating is in contact with a side of the grid-shaped touch electrode facing away from the display layer; a vertical projection of the viewing angle adjustment grating on the substrate overlaps with a vertical projection of at least part of the grid-shaped touch electrode on the substrate.

[0010] In a second aspect, the present disclosure further provides a display device, comprising the display panel described in the second aspect.

[0011] In a third aspect, the present disclosure further provides a method for preparing a display panel, comprising:

[0012] forming a substrate;

[0013] forming a display layer on one side of the substrate, the display layer comprising a plurality of sub-pixels;

[0014] forming a touch material layer on a side of the display layer facing away from the substrate;

[0015] forming a photoresist layer on a side of the touch material layer away from the display layer, and exposing the photoresist layer to form a photoresist pattern;

[0016] Forming at least a portion of the grid-shaped touch electrodes by developing the photoresist pattern;

[0017] At least a portion of the photoresist pattern is retained as a viewing angle adjustment grating.

[0018] Compared with the prior art, the technical solution provided by the present invention has the following advantages:

[0019] The present disclosure provides a display panel, a display device, and a method for preparing a display panel, wherein the display panel includes a substrate; a display layer, the display layer is located on one side of the substrate, and the display layer includes a plurality of sub-pixels; a touch layer, the touch layer is located on the side of the display layer away from the substrate, and the touch layer includes a grid-shaped touch electrode; a viewing angle adjustment grating, the viewing angle adjustment grating is in contact with a side of the grid-shaped touch electrode 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 part of the grid-shaped touch electrode on the substrate. In the embodiment of the present disclosure, a viewing angle adjustment grating is provided on the side of the grid-shaped touch electrode away from the display layer, and the viewing angle adjustment grating is used to block the light emitted by the display layer, thereby achieving the purpose of anti-peeping and reducing the viewing angle of the display panel. There is no need to add an additional anti-peeping film. On the one hand, the preparation process of the display panel can be simplified and the production cost can be reduced. On the other hand, the film layer of the display device is reduced, which is conducive to the thinness of the display device and avoids the problem that the anti-peeping film attached to the display panel is easily damaged and the display device cannot achieve the anti-peeping effect after damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 A partially enlarged top view structural schematic diagram of a display panel provided in an embodiment of the present disclosure;

[0023] Figure 2 A schematic diagram of a cross-sectional structure of a display panel provided in an embodiment of the present disclosure;

[0024] Figure 3 A schematic diagram of a process for preparing a display panel provided in an embodiment of the present disclosure;

[0025] Figure 4-Figure 16 for Figure 3 A schematic cross-sectional structure diagram of each step in a method for manufacturing a display panel is shown;

[0026] Fig.17 A partially enlarged schematic top view of another display panel provided in an embodiment of the present disclosure;

[0027] Fig.18 A partially enlarged schematic top view of another display panel provided in an embodiment of the present disclosure;

[0028] Fig.19 A partially enlarged schematic top view of another display panel provided in an embodiment of the present disclosure;

[0029] Fig. 20 A partially enlarged schematic top view of another display panel provided in an embodiment of the present disclosure;

[0030] Fig.21 A partially enlarged schematic top view of another display panel provided in an embodiment of the present disclosure;

[0031] Fig. 22 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure;

[0032] Fig.23 A partially enlarged schematic top view of another display panel provided in an embodiment of the present disclosure;

[0033] Fig.24 A partially enlarged schematic top view of another display panel provided in an embodiment of the present disclosure;

[0034] Fig.25 A partial top view schematic diagram of another display panel provided in an embodiment of the present disclosure;

[0035] Fig.26 for Fig.11 A magnified schematic diagram of the middle region Q;

[0036] Fig. 27 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure;

[0037] Fig.28 A partial top view schematic diagram of another display panel provided in an embodiment of the present disclosure;

[0038] Fig.29 for Fig.13A magnified schematic diagram of the middle region P;

[0039] Fig.30 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure;

[0040] Fig.31 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure;

[0041] Fig.32 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure;

[0042] Fig.33 A schematic diagram of the structure of a display device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0043] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0045] In the related anti-peeping technology, generally after the display device is prepared, an anti-peeping film is attached to the surface of the display panel, or a grating that blocks light is directly integrated into the display panel by adding process steps. The above methods have high production costs and complex processes.

[0046] In order to solve the above problems, the embodiment of the present disclosure provides a display panel, which includes a substrate; a display layer, the display layer is located on one side of the substrate, and the display layer includes a plurality of sub-pixels; a touch layer, the touch layer is located on the side of the display layer away from the substrate, and the touch layer includes a grid-shaped touch electrode; a viewing angle adjustment grating, the viewing angle adjustment grating is in contact with a side of the grid-shaped touch electrode 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 part of the grid-shaped touch electrode on the substrate. Therefore, by providing a viewing angle adjustment grating on the side of the grid-shaped touch electrode away from the display layer, the viewing angle adjustment grating is used to block the light emitted by the display layer, thereby achieving the purpose of anti-peeping and reducing the viewing angle of the display panel. In addition, there is no need to add an additional anti-peeping film. On the one hand, the preparation process can be simplified and the production cost can be reduced. On the other hand, the film layer of the display device is reduced, which is conducive to the thinness of the display device and avoids the problem that the anti-peeping film attached to the display panel is easily damaged and the display device cannot achieve the anti-peeping effect after damage.

[0047] Figure 1 A partially enlarged top view of a display panel provided in an embodiment of the present disclosure is shown. Figure 2 A schematic cross-sectional structure diagram of a display panel provided by an embodiment of the present disclosure. Figure 1 and Figure 2 The substrate 1 is used to support and protect the film layer thereon. The substrate 1 may be a rigid substrate, for example, the material of the substrate 1 is glass. The substrate 1 may also be a flexible substrate, for example, the material of the substrate 1 may include one or more combinations of polymer resins of polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate and cellulose acetate propionate. The disclosed embodiment does not specifically limit the material of the substrate 1.

[0048] 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 , two sub-pixels 21 of the display layer 2 are exemplarily shown. The specific number of sub-pixels 21 can be set according to the actual display requirements of the display panel 100, and the embodiments of the present disclosure are not limited to this. The touch layer 3 is used to achieve the touch effect of the display panel 100. The touch layer 3 may include, for example, a grid-like touch electrode 31. The grid-like touch electrode 31 surrounds adjacent sub-pixels 21 and is used to receive a touch drive signal and generate a touch sensing signal based on external touch. The structure of the grid-like touch electrode 31 may be a metal mesh. The grid-like touch electrode 31 includes a plurality of metal wires extending along a first direction and a second direction. The metal wires extending in different directions cross to form a mesh. A disconnecting portion 311 is provided between at least some adjacent grid-like touch electrodes 31 to achieve insulation between adjacent grid-like touch electrodes 31.

[0049] Figure 2 It is also exemplarily shown that an encapsulation layer 7 is provided between the touch layer 3 and the display layer 2. The encapsulation layer 7 may be, for example, an inorganic layer. Since the inorganic layer has a strong barrier capability, such as blocking water and oxygen, it can ensure that the sub-pixel 21 is not affected by moisture and oxygen, thereby increasing the life of the sub-pixel 21. In this embodiment, when the encapsulation layer 7 includes a plurality of organic layers and an inorganic layer, it can further block moisture and oxygen from entering the sub-pixel 21, thereby increasing the life of the sub-pixel 21 and ensuring reliable encapsulation. Figure 1 The specific structure of the encapsulation layer 7 is not specifically shown in the figure. The specific film layer structure of the encapsulation layer 7 can be set according to the actual use requirements of the display panel 100, and the embodiment of the present disclosure is not limited to this.

[0050] The display panel 100 may further include a viewing angle adjustment grating 4, which is in contact with a surface of the grid-shaped touch electrode 31 that is away from the display layer 2. Figure 2exemplarily shows that the vertical projection of the viewing angle adjustment grating 4 on the substrate 1 and the vertical projection of the grid-shaped touch electrode 31 on the substrate 1 completely overlap within the error range, and the vertical projection of the viewing angle adjustment grating 4 on the substrate 1 and the vertical projection of the grid-shaped touch electrode 31 on the substrate 1 can also be set to partially overlap, which is not limited in the embodiment of the present disclosure. The viewing angle adjustment grating 4 can be Figure 2 The trapezoid shown may also be a rectangle or other shapes, which is not limited in the embodiments of the present disclosure.

[0051] Figure 2 The solid arrow in the figure represents the direction of the light that can be emitted, and the dotted arrow represents the direction of the light that cannot be emitted and is blocked by the viewing angle adjustment grating 4. Figure 2 It can be seen that the viewing angle adjustment grating 4 can block the light emitted by the sub-pixel 21 in the display layer 2, that is, the light emitted by the sub-pixel 21 in the display layer 2 is blocked and cannot be emitted outward after being irradiated by the viewing angle adjustment grating 4, and the light is emitted in a direction close to perpendicular to the substrate 1 as much as possible. When the user is at a position deviating from the direction perpendicular to the substrate 1, he cannot receive the light emitted by the sub-pixel 21 in the display layer 2, thereby achieving an anti-peeping effect.

[0052] In the embodiment of the present disclosure, a viewing angle adjustment grating 4 is provided on the side of the grid-shaped touch electrode 31 away from the display layer 2, and the vertical projection of the viewing angle adjustment grating 4 on the substrate 1 overlaps with the vertical projection of at least part of the grid-shaped touch electrode 31 on the substrate 1. The viewing angle adjustment grating 4 is used to block the light emitted by the sub-pixel 21 in the display layer 2, thereby achieving the purpose of anti-peeping and reducing the viewing angle of the display panel 100. No additional anti-peeping film is required, which can simplify the preparation process and reduce the production cost on the one hand, and reduce the film layer of the display device on the other hand, which is conducive to the thinness of the display device and avoids the problem that the anti-peeping film is easy to be damaged and the anti-peeping effect cannot be achieved after damage.

[0053] In some embodiments, in combination Figure 1 and Figure 2 The viewing angle adjustment grating 4 and the grid-shaped touch electrode 31 are formed synchronously by photolithography.

[0054] Figure 3 A schematic diagram of a method for preparing a display panel provided in an embodiment of the present disclosure is shown in FIG. Figure 3 As shown, the method for preparing the display panel includes:

[0055] S101, forming a substrate.

[0056] Specifically, Figure 4 As shown, the substrate 1 may be, for example, a flexible substrate or a rigid substrate, for supporting and protecting the film layer thereon. The material of the substrate 1 is not specifically limited in the embodiment of the present disclosure.

[0057] S102 . Form a display layer on one side of the substrate, where the display layer includes a plurality of sub-pixels.

[0058] Specifically, Figure 5 As shown, the sub-pixel 21 may include, for example, a red sub-pixel 21, a green sub-pixel 21, and a blue sub-pixel 21. The areas of the sub-pixels 21 of different colors may be the same or different, and the 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 the embodiment of the present disclosure does not limit the specific film layer arrangement of the display layer.

[0059] Exemplarily, after forming the display layer, the method further includes: forming a packaging layer, a wiring structure and an insulating layer in sequence.

[0060] like Figure 6 As shown, an encapsulation layer 7 may be first formed on the side of the display layer 2 facing away from the substrate 1 to isolate water and oxygen, thereby ensuring that the sub-pixel 21 is not affected by moisture and oxygen and improving the stability and service life of the sub-pixel 21.

[0061] like Figure 7 and Figure 8 As shown, a wiring layer 321 is first formed on the side away from the encapsulation layer 7, and a transparent photoresist layer 60 is formed on the side of the wiring layer 321 away from the display layer 2. The transparent photoresist layer 60 is, for example, a positive photoresist, and a mask 9 with a certain shape is used to pattern the transparent photoresist layer 60. Figure 7 The portion filled with the pattern is the opaque area of ​​the mask 9, and the other areas are transparent areas, and the solid arrows represent light. After exposure and development, the transparent photoresist layer 60 corresponding to the opaque area 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 with an etching solution, and the wiring layer 321 located between the transparent photoresist layer 60 and the display layer 2 is retained, and the wiring layer 321 at other locations is etched. The touch material layer 33 is etched with an etching solution, and the wiring layer 321 located between the transparent photoresist layer 60 and the display layer 2 is retained, and the wiring layer 321 at other locations is etched, and the transparent photoresist layer 60 is peeled off, thereby forming a structure as shown in the figure. Fig. 9 The wiring structure 32 is shown.

[0062] like Fig.10 As shown, an insulating layer 5 is formed on the side of the encapsulation layer 7 facing away from the display layer 2 , and a via hole 30 is provided in the insulating layer 5 .

[0063] S103 , forming a touch material layer on a side of the display layer facing away from the substrate.

[0064] For example, Fig.11As shown, a touch material layer 33 is formed on the side of the insulating layer 5 facing away from the display layer 2 to realize the touch function of the display panel 100 .

[0065] S104 , forming a photoresist layer on a side of the touch material layer away from the display layer, and exposing the photoresist layer to form a photoresist pattern.

[0066] S105 , forming at least a portion of a grid-shaped touch electrode by developing the photoresist pattern.

[0067] Specifically, Fig.12 As shown, a photoresist layer 6 is formed on the side of the touch material layer 33 facing away from the display layer 2 . For example, a layer of photoresist can be coated on the surface of the touch material layer 33 .

[0068] Photoresist, also known as photoresist, is a light-sensitive mixed liquid composed of three main components: photosensitive resin, sensitizer and solvent. Photoresist should have a relatively small surface tension so that it has good fluidity and coverage. After being exposed to light, the photosensitive resin can quickly undergo a photocuring reaction in the exposed area, causing the physical properties of this material, especially solubility and affinity, to change significantly. According to the chemical reaction mechanism and development principle of photoresist, it can be divided into two categories: negative photoresist and positive photoresist. Negative photoresist forms insoluble substances after exposure to light; conversely, positive photoresist is insoluble in certain solvents but becomes soluble after exposure to light.

[0069] In some embodiments, the photoresist layer 6 can be formed of, for example, a positive photoresist, which can include positive photoresists such as polymethyl methacrylate positive photoresist, epoxy resin positive photoresist, polystyrene positive photoresist and polystyrene positive photoresist. The embodiments of the present disclosure do not limit the specific composition materials of the positive photoresist.

[0070] In other embodiments, the photoresist layer 6 may be formed by, for example, using a negative photoresist, which may include a negative photoresist such as polyester glue and cyclized rubber. The embodiments of the present disclosure do not limit the specific composition materials of the negative photoresist.

[0071] Since the photoresist layer 6 used in the embodiment of the present disclosure needs to block light so that the display panel 100 can achieve an anti-peeping effect, it is necessary to dope carbon black and other materials in the photoresist to form a black photoresist layer 6 for anti-peeping. The black photoresist layer 6 has the advantages of good UV protection, high resolution, high durability, high precision, etc., which can meet the needs of producing high-precision optical devices.

[0072] Reference Fig.13 and Fig.15 , taking the black photoresist using positive photoresist as an example, Fig.13The arrow in the figure represents illumination. The black photoresist is patterned using a mask 9 with a certain shape. The mask 9 includes a transparent area and an opaque area. Fig.13 The portion filled with the pattern is an opaque area, and the other area is a transparent area. By utilizing the characteristics of the positive photoresist, the black photoresist layer 6 corresponding to the transparent area 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 area 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.

[0073] Using etching solution Fig.15 The touch material layer 33 in the middle is etched, the touch material layer 33 between the black photoresist layer 6 and the display layer 2 is retained, and the touch material layer 33 in other positions is etched, so that the touch material layer is formed as shown in FIG. Fig.16 The grid-shaped touch electrodes 31 are shown.

[0074] Reference Fig.14 and Fig.15 Taking the black photoresist as a negative photoresist as an example, a mask 9 with a certain shape is used to pattern the black photoresist, and the mask 9 includes a transparent area and an opaque area. Fig.25 The portion filled with the pattern is an opaque area, and the other area is a transparent area. By utilizing the characteristics of the negative photoresist, the black photoresist layer 6 corresponding to the transparent area undergoes a cross-linking reaction after being exposed to light to form an insoluble substance, while the black photoresist layer 6 corresponding to the opaque area 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 plate 9.

[0075] Using etching solution Fig.15 The touch material layer 33 in the middle is etched, the touch material layer 33 between the black photoresist layer 6 and the display layer 2 is retained, and the touch material layer 33 in other positions is etched, thereby Fig.15 The touch material layer 33 in the embodiment is formed as follows Fig.16 The grid-shaped touch electrodes 31 are shown.

[0076] S106, retaining at least a portion of the photoresist pattern as a viewing angle adjustment grating.

[0077] Thus, the touch material layer forms a grid-shaped touch electrode 31, and the remaining black photoresist is used as the viewing angle adjustment grating 4. Since the viewing angle adjustment grating 4 is formed by black photoresist, the viewing angle adjustment grating 4 can block the light, thereby achieving an anti-peeping effect. Figure 2 After the viewing angle adjustment grating 4 is formed, a planarization layer 8 is formed to achieve planarization of the display panel 100 .

[0078] Thus, the viewing angle adjustment grating 4 and the grid-like touch electrode 31 are formed synchronously by photolithography, and the viewing angle adjustment grating 4 with the function of blocking light is used to replace the conventional photoresist which has no blocking function and needs to be stripped off after the photolithography is completed. On the one hand, after the preparation of the grid-like touch electrode 31 is completed, there is no need to strip off the viewing angle adjustment grating 4, which simplifies the preparation process of the display panel 100 and reduces the production cost. On the other hand, the viewing angle adjustment grating 4 prepared by black photoresist blocks light, which plays a role of anti-peeping.

[0079] It should be noted that the viewing angle adjustment grating 4 can also be made of other materials with light shielding effect, can be formed synchronously with the grid-shaped touch electrode 31 by photolithography, and can shield light, which is not specifically limited in the embodiment of the present disclosure.

[0080] Fig.17 A partially enlarged top view of another display panel provided in an embodiment of the present disclosure is shown in FIG. Figure 1 , Figure 2 and Fig.17 The viewing angle adjustment grating 4 is in a grid shape, and the vertical projection of the viewing angle adjustment grating 4 on the substrate 1 covers the vertical projection of the grid-shaped touch electrode 31 on the substrate 1 .

[0081] Fig.17 It is exemplarily shown that the viewing angle adjustment grating 4 and the grid-like touch electrode 31 have the same shape, both in a grid shape. By way of example, during the preparation process, a grid-like mask can be used to pattern the black photoresist forming the viewing angle adjustment grating 4. After exposure and development, a grid-like viewing angle adjustment grating 4 is formed. The touch material layer located on the side of the grid-like viewing angle adjustment grating 41 close to 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, and the touch material layer at other positions is etched, thereby the touch material layer also forms a grid-like touch electrode 31.

[0082] In the related art, the preparation process of forming a grid-shaped touch electrode may include, for example, forming a photoresist layer on the side of the touch material layer away from the display layer. The photoresist layer may be made of an ordinary photoresist material that does not have a light-shielding effect. After exposure, development and etching, the remaining photoresist layer is peeled off, leaving only the grid-shaped touch electrode. However, after the viewing angle adjustment grating 4 provided in the embodiment of the present disclosure is formed synchronously with the grid-shaped touch electrode 31, it is not necessary to peel off the viewing angle adjustment grating 4. The light-shielding performance of the viewing angle adjustment grating 4 is used to achieve a peeping effect, which also simplifies the preparation process of the display panel 100 and reduces the production cost.

[0083] Fig.18 A partially enlarged top view of another display panel provided in an embodiment of the present disclosure is shown. Fig.19A partially enlarged top view of another display panel provided in an embodiment of the present disclosure. Fig.18 and Fig.19 The display panel 100 includes a first edge 10 and a second edge 20 , and the first edge 10 and the second edge 20 have an included angle; the viewing angle adjustment grating 4 includes a first portion 41 , and an extension direction of the first portion 41 is parallel to the first edge 10 or the second edge 20 .

[0084] For example, in combination Fig.18 and Fig.19 The display panel 100 includes, for example, two first sides 10 and two second sides 20, and the angle between the first side 10 and the second side 20 is, for example, 90 degrees. Fig.18 and Fig.19 For example, the extending direction of the first side 10 is, for example, the pixel row direction, and the extending direction of the second side 20 is, for example, the pixel column direction.

[0085] In some embodiments, the method for preparing a display panel, wherein at least a portion of the photoresist pattern is retained as a viewing angle adjustment grating, comprises:

[0086] The photoresist layer parallel to the first side of the display panel is peeled off to form a viewing angle adjustment grating; or the photoresist layer parallel to the second side of the display panel is peeled off to form a viewing angle adjustment grating; wherein the first side and the second side have an angle.

[0087] Specifically, Fig.18 and Fig.19 After the photoresist layer and the grid-shaped touch electrode 31 are synchronously photolithographically formed, in order to meet the anti-peeping requirements in different directions, the photoresist layer extending in a direction parallel to the first edge 10 can be peeled off as needed to form a first portion 41 of the viewing angle adjustment grating 4 extending in a direction parallel to the second edge 20, or the photoresist layer 6 extending in a direction parallel to the second edge 20 can be peeled off to form a first portion 41 of the viewing angle adjustment grating 4 extending in a direction parallel to the first edge 10.

[0088] Fig.18 and Fig.19 Different filling patterns are used to distinguish the viewing angle adjustment grating 4 and the grid-shaped touch electrode 31. Fig.18 exemplarily shows that the extension direction of the first portion 41 of the viewing angle adjustment grating 4 is parallel to the first side 10, and can prevent peeping in the direction perpendicular to the first side 10. Fig.19 exemplarily shows that the extension direction of the first portion 41 of the viewing angle adjustment grating 4 is parallel to the second side 20 , and can prevent peeping in a direction perpendicular to the second side 20 . Fig.18 and Fig.19It is exemplarily shown that the areas of the sub-pixels 21 in the display layer 2 are equal. It can be understood that the areas of the sub-pixels 21 in the display layer 2 may not be equal, and the embodiments of the present disclosure are not limited to this.

[0089] 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 an anti-peeping effect in a specific direction, meet the different anti-peeping needs of users, and improve the user experience.

[0090] It should be noted that the angle between the first side 10 and the second side 20 may also be other angles, for example, and the embodiment of the present disclosure is not limited to this.

[0091] It should be noted that the peeling method may be, for example, ultrasonic peeling, chemical peeling, mechanical peeling or the like, which is set according to the actual preparation process of the display panel 100 and is not limited in the embodiment of the present disclosure.

[0092] Fig. 20 A partially enlarged top view of another display panel provided in an embodiment of the present disclosure is shown. Fig.21 A partially enlarged top view of another display panel provided in an embodiment of the present disclosure is shown. Fig. 22 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure. Figure 20 to Figure 22 The viewing angle adjustment grating 4 further includes a second portion 42 , and a vertical projection of the second portion 42 on the substrate 1 partially overlaps with a vertical projection of the sub-pixel 21 on the substrate 1 .

[0093] Fig. 22 For example, it can be Fig. 20 The cross-sectional structure diagram along the AA' direction can also be Fig.21 Schematic diagram of the cross-sectional structure along the BB' direction, Fig. 22 The dashed arrows in φ represent the light that is blocked by the viewing angle adjustment grating 4 and cannot be emitted, and the solid arrows represent the light that can be emitted by the display panel 100 .

[0094] When the area of ​​the sub-pixel 21 is large, the anti-peeping effect of the viewing angle adjustment grating 4 including only the first portion 41 is limited, so the viewing angle adjustment grating 4 in the embodiment of the present disclosure also includes the second portion 42. Fig. 22 It can be seen that the visible range when the viewing angle adjustment grating 4 includes only the first portion 41 is larger than the visible range when the viewing angle adjustment grating 4 includes the first portion 41 and the second portion 42 . Fig. 22It is exemplarily shown that when the viewing angle adjustment grating 4 only includes the first part 41, the angle between the light that can be emitted by the display layer 2 and the direction parallel to the substrate layer 1 is, for example, α1; when the viewing angle adjustment grating 4 includes the first part 41 and the second part 42, the angle between the light that can be emitted by the display layer 2 and the direction parallel to the substrate layer 1 is, for example, α2. The light emitted at a large angle will be blocked by the second part, so that α2 is greater than α1. As a result, the second part 42 can block the light from being emitted to the surroundings of the display panel 100, and the user can see the content displayed by the display panel 100 at an angle closer to the front view of the display panel 100.

[0095] by Fig. 20 Take the direction in as an example and combine Fig. 22 From the visible range, we can see that Fig. 20 The second portion 42 provided in the display panel 100 blocks the light emitted by the sub-pixel 21 from being diverged in the up and down directions. Fig.21 Take the direction in as an example and combine Fig. 22 From the visible range, we can see that Fig.21 The second portion 42 provided in the middle blocks the light emitted by the sub-pixel 21 from diverging to the left and right directions of the display panel 100. This can improve the anti-peeping effect of the display panel 100, and other users around the display panel 100 are less likely to see the content displayed by the display panel 100. Fig. 20 and Fig.21 The exemplary embodiment shows that the areas of the sub-pixels 21 in the display layer 2 are equal. It is understandable that the areas of the sub-pixels 21 in the display layer 2 may not be equal, and the embodiment of the present disclosure does not limit this. Fig. 20 and Fig.21 It is exemplarily shown that the second portion 42 is provided on the side of some sub-pixels 21 facing away from the substrate 1. It can also be arranged that all sub-pixels 21 in the display panel 100 are provided with the second portion 42 on the side facing away from the substrate 1. It can be arranged according to the anti-peeping requirements of the display panel 100, and the embodiments of the present disclosure are not limited here.

[0096] Therefore, by setting the second portion 42 whose vertical projection on the substrate 1 partially overlaps with 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 layer can be increased, thereby reducing the visible range of the display panel 100, and increasing the difficulty for the user to view the display content of the display panel 100 at a side viewing angle of the display panel 100, thereby further improving the anti-peeping effect.

[0097] In some embodiments, in combination Fig. 20 and Fig.21 , an extending direction of the second portion 42 is parallel to an extending direction of the first portion 41 .

[0098] Fig. 20exemplarily shows that when the extension direction of the first portion 41 is parallel to the first side 10, a second portion 42 is further provided between adjacent first portions 41, in a direction perpendicular to the first side 10, Fig. 22 When the viewing angle adjustment grating 4 only includes the first part 41, the angle between the light emitted by the display layer 2 in the direction perpendicular to the first side 10 and the direction parallel to the substrate 1 is α1. When the viewing angle adjustment grating 4 includes the first part 41 and the second part 42, the angle between the light emitted by the display layer 2 in the direction perpendicular to the first side 10 and the direction parallel to the substrate 1 is α2. The density of the viewing angle adjustment grating 4 is increased so that α2 is greater than α1. Fig. 20 direction as an example, and refer to Fig. 22 It can be seen that when the user views the display panel 100 from bottom to top or from top to bottom, the user's viewing angle should be close to perpendicular to the direction of the substrate 1 in order to see the content displayed by the display panel 100, which reduces the visible range of the display panel 100. Therefore, the display panel 100 provided in the embodiment of the present disclosure has an excellent anti-peeping effect.

[0099] Fig.21 exemplarily shows that when the extension direction of the first portion 41 is parallel to the second side 20, a second portion 42 is further provided between adjacent first portions 41, in a direction perpendicular to the second side 20, Fig. 22 When the viewing angle adjustment grating 4 only includes the first part 41, the angle between the light emitted by the display layer 2 in the direction perpendicular to the second side 20 and the direction parallel to the substrate 1 is α1. When the viewing angle adjustment grating 4 includes the first part 41 and the second part 42, the angle between the light emitted by the display layer 2 in the direction perpendicular to the second side 20 and the direction parallel to the substrate 1 is α2. The density of the viewing angle adjustment grating 4 is increased so that α2 is greater than α1. Fig.21 direction as an example, and refer to Fig. 22 It can be seen that when the user views the display panel 100 from left to right or from right to left, the user's viewing angle should be close to perpendicular to the direction of the substrate 1 in order to see the content displayed by the display panel 100, which reduces the visible range of the display panel 100. Therefore, the display panel 100 provided in the embodiment of the present disclosure has an excellent anti-peeping effect.

[0100] Fig.23 A partially enlarged top view of another display panel provided in an embodiment of the present disclosure is shown. Fig.24 A partially enlarged top view of another display panel provided in an embodiment of the present disclosure. Fig.23 and Fig.24 , an extending direction of the second portion 42 and an extending direction of the first portion 41 form an included angle.

[0101] Fig.23 and Fig.24exemplarily shows that the extension direction of the first portion 41 is parallel to the first side 10, and the extension direction of the second portion 42 is at an angle to the extension direction of the first portion 41. Fig.23 For example, the second portion 42 can block the light emitted by the sub-pixel 21 from diverging toward the upper left corner and the lower right corner of the display panel 100, and can achieve anti-peeping in the upper left corner and the lower right corner of the display panel 100. Fig.24 Taking the direction as an example, the second portion 42 can block the light emitted by the sub-pixel 21 from diverging toward the lower left corner and the upper right corner of the display panel 100, and can achieve anti-peeping in the lower left corner and the upper right corner of the display panel 100.

[0102] In addition, since the extension direction of the second portion 42 has an angle with the extension direction of the first portion 41, the second portion 42 has components in the direction parallel to the first side 10 and in the direction parallel to the second side 20. Therefore, the density of the viewing angle adjustment grating 4 of the second portion 42 in the direction parallel to the first side 10 and in the direction parallel to the second side 20 can be increased, thereby improving the anti-peeping effect of the display panel 100.

[0103] It should be noted that the angle between the extension direction of the second portion 42 and the extension direction of the first portion 41 can be set according to the actual anti-peeping requirements of the display panel 100. The embodiment of the present disclosure is not limited to this. When the extension direction of the first portion 41 is parallel to the second edge 20, the extension direction of the second portion 42 and the extension direction of the first portion 41 can also be set to have an angle with reference to the above embodiment, which is not elaborated here.

[0104] Fig.25 A partial top view of another display panel provided in an embodiment of the present disclosure is shown in FIG. Fig.26 for Fig.25 A magnified schematic diagram of the middle region Q, Fig. 27 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure, Fig.28 A partial top view of another display panel provided in an embodiment of the present disclosure is shown in FIG. Fig.29 for Fig.28 In some embodiments, in combination with Figure 25 to Figure 29 , the vertical projection areas of the viewing angle adjustment gratings 4 corresponding to the sub-pixels 21 of the same color on the substrate 1 are the same.

[0105] Specifically, combined Figure 25 to Figure 29 Since the luminous efficiency and service life of sub-pixels 21 of different colors are different, and according to the requirements of the colors presented by the display panel 100, the luminous areas of sub-pixels 21 of different colors can be set to be different.

[0106] Fig.25 and Fig.26exemplarily shows that the viewing angle adjustment grating 4 is in a grid shape, for example, and the viewing angle adjustment grating 4 is located between adjacent sub-pixels 21. The sub-pixel 21 may include a first color sub-pixel 211, a second color sub-pixel 212, and a third color sub-pixel 213. Fig. 27 It is shown in the figure 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 grating 4 corresponding to the second color sub-pixel 212, and 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 output of the first color sub-pixel 211 is smaller than the light output of the second color sub-pixel 212. Therefore, in order to ensure that the display panel 100 does not have the problem of color cast, it is necessary 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, so that the same color sub-pixel 21 has the same amount of attenuated light after being blocked by the viewing angle adjustment grating 4, so as to avoid the different light attenuation amounts of the same color sub-pixel 21 in different areas, thereby causing the problem of color cast.

[0107] In order to clearly illustrate the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to the sub-pixel 21 on the substrate 1, the area of ​​the first portion 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 portion 41 of the viewing angle adjustment grating 4 located between three adjacent sub-pixels 21 can be divided into three parts. Fig.26 For example, the area of ​​the first portion 41 of the viewing angle adjustment grating 4 corresponding to the first color sub-pixel 211 is Fig.26 The area of ​​the region A in the figure, the area of ​​the viewing angle adjustment grating 4 corresponding to the second color sub-pixel 212 is Fig.26 The area of ​​the region B in FIG. 1 is the area of ​​the viewing angle adjustment grating 4 corresponding to the third color sub-pixel 213. Fig.26 The area of ​​region C in .

[0108] In order to make the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to the same color sub-pixel 21 on the substrate 1 the same, the area of ​​the first portion 41 of the viewing angle adjustment grating 4 corresponding to each first color sub-pixel 211 in the display panel 100 is Fig.26 The area of ​​the region A in the display panel 100 is the area of ​​the first portion 41 of the viewing angle adjustment grating 4 corresponding to each second color sub-pixel 212. Fig.26 The area of ​​the first portion 41 of the viewing angle adjustment grating 4 corresponding to each third color sub-pixel 213 in the display panel 100 is Fig.26 The area of ​​region C in .

[0109] Fig.28 and Fig.29 exemplarily shows that the viewing angle adjustment grating 4 includes a first portion 41 and a second portion 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 portion 41 and the area of ​​the second portion 42 overlapping the vertical projection portion of the sub-pixel 21 on the substrate 1. The division method of the area of ​​the first portion 41 between adjacent sub-pixels 21 can refer to Fig.26 , I will not go into details here.

[0110] by Fig.29 For example, the area of ​​the viewing angle adjustment grating 4 corresponding to the first color sub-pixel 211 is Fig.29 The area of ​​the viewing angle adjustment grating 4 corresponding to the second color sub-pixel 212 is the sum of the area of ​​the region D in the image and the area of ​​the second portion 42 overlapping the vertical projection portion of the first color sub-pixel 211 on the substrate 1. Fig.29 The area of ​​the viewing angle adjustment grating 4 corresponding to the third color sub-pixel 213 is the sum of the area of ​​the region E in the image and the area of ​​the second portion 42 overlapping the vertical projection portion of the second color sub-pixel 212 on the substrate 1. Fig.29 The sum of the area of ​​the region F in FIG. 1 and the area of ​​the second portion 42 overlapping the vertical projection portion of the third color sub-pixel 213 on the substrate 1 .

[0111] In order to make the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to the same color sub-pixel 21 on the substrate 1 the same, the area of ​​the first portion 41 of the viewing angle adjustment grating 4 corresponding to each first color sub-pixel 211 in the display panel 100 is Fig.29 The area of ​​the first portion 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 ​​the region D in the display panel 100 and the area of ​​the second portion 42 overlapping the vertical projection portion of the first color sub-pixel 211 on the substrate 1. Fig.29 The area of ​​the first portion 41 of the viewing angle adjustment grating 4 corresponding to each third color sub-pixel 213 in the display panel 100 is the sum of the area of ​​the region E in the display panel 100 and the area of ​​the second portion 42 overlapping the vertical projection portion of the second color sub-pixel 212 on the substrate 1, and the area of ​​the first portion 41 of the viewing angle adjustment grating 4 corresponding to each third color sub-pixel 213 in the display panel 100 is Fig.29 The sum of the area of ​​region F in the image and the area of ​​the second portion 42 overlapping with the vertical projection portion of the third color sub-pixel 213 on the substrate 1 ensures that the same color sub-pixel 21 has the same amount of attenuated light after being blocked by the viewing angle adjustment grating 4, thereby avoiding the problem of color deviation caused by different light attenuation amounts of the same color sub-pixel 21 in different regions.

[0112] It should be noted that the specific size relationship of the areas of sub-pixels 21 of different colors is not limited to that shown in the drawings of the embodiments of the present disclosure, and can also be set according to the actual use requirements of the display panel 100. The embodiments of the present disclosure are not limited to this.

[0113] In some embodiments, Figure 2 As shown, along the direction perpendicular to the substrate 1 , the heights of the viewing angle adjustment gratings 4 corresponding to the sub-pixels 21 of the same color are the same.

[0114] Specifically, Figure 2 The sub-pixels 21 shown in the figure are, for example, sub-pixels 21 of the same color. Due to the different heights of the viewing angle adjustment grating 4, the shielding effects on the light emitted by the display layer 2 are different. For example, the higher the height of the viewing angle adjustment grating 4, the larger the angle between the light emitted by the display layer 2 and the direction parallel to the substrate 1, and the smaller the light output of the corresponding sub-pixel 21. Therefore, in order to ensure that the display panel 100 does not have a color cast problem before and after the viewing angle adjustment grating 4 blocks the light, the heights of the viewing angle adjustment grating 4 corresponding to the sub-pixels 21 of the same color are set to be the same along the direction perpendicular to the substrate 1. After the sub-pixels 21 of the same color are blocked by the viewing angle adjustment grating 4, the attenuation ratio of the light amount is the same, so as to avoid the different heights of the viewing angle adjustment grating 4 corresponding to the sub-pixels 21 of the same color at different positions, resulting in different light outputs of the sub-pixels 21 of the same color after being blocked by the viewing angle adjustment grating 4, causing the display panel 100 to have a color cast problem, thereby improving the display effect of the display panel 100.

[0115] In some embodiments, in combination Figure 25 to Figure 29 The vertical projection areas of the viewing angle adjustment grating 4 on the substrate 1 corresponding to the sub-pixels 21 of different areas are 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 .

[0116] Depend on Fig. 27 It can be seen that the vertical projection areas of the viewing angle adjustment gratings 4 corresponding to the sub-pixels 21 of different colors on the substrate 1 are different, the visible ranges of the sub-pixels 21 of different colors are different, and the light output amounts of the sub-pixels 21 of different colors are also different. In order to ensure that the display panel 100 does not have a color cast problem before and after the viewing angle adjustment grating 4 blocks the light, it is necessary to ensure that the vertical projection areas of the viewing angle adjustment gratings 4 corresponding to the sub-pixels 21 of different areas on the substrate 1 are different, so that after the sub-pixels 21 of different areas are blocked by the viewing angle adjustment grating 4, the attenuation ratio of the light output is the same, thereby avoiding the problem of color cast.

[0117] For example, in combination Figure 25 to Figure 29, the display layer 2 may include, for example, 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. Fig. 27 Combined with the analysis of the above embodiments, it can be seen that the larger the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to the sub-pixel 21 on the substrate 1, the smaller the visible range corresponding to the sub-pixel 21, and the more the attenuation of the light emitted by the sub-pixel 21. In order to make the attenuation ratio of the light emitted by sub-pixels 21 of different areas the same, the larger the area of ​​the sub-pixel 21, the larger the vertical projection area of ​​the viewing angle adjustment grating 4 corresponding to the sub-pixel 21 on the substrate 1.

[0118] Exemplarily, 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 refer to the above embodiment, and the embodiment of the present disclosure will not be repeated in detail.

[0119] Fig.30 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure, Fig.31 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure. Fig.30 and Fig.31 , along the direction perpendicular to the substrate 1 , the heights of the viewing angle adjustment grating 4 corresponding to the sub-pixels 21 of different areas are different; wherein the height of the viewing angle adjustment grating 4 is positively correlated with the area of ​​the corresponding sub-pixel 21 .

[0120] Specifically, combined Fig.30 and Fig.31 The higher the height of the viewing angle adjustment grating 4, the larger the angle between the light emitted by the display layer 2 and the direction parallel to the substrate 1, and the smaller the light output of the corresponding sub-pixel 21. In order to ensure that the display panel 100 does not have a color cast problem before and after the viewing angle adjustment grating 4 blocks the light, it is necessary to ensure that the heights of the viewing angle adjustment gratings 4 corresponding to sub-pixels 21 of different colors are different along the direction perpendicular to the substrate 1, so that after the sub-pixels 21 of different colors are blocked by the viewing angle adjustment grating 4, the attenuation ratio of the amount of light emitted is the same, thereby avoiding the problem of color cast.

[0121] For example, Fig.30As shown, the display layer 2 may include, for example, 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 greater than the area of ​​the second color sub-pixel 212, and the area of ​​the second color sub-pixel 212 is greater than the area of ​​the third color sub-pixel 213. In order to make the attenuation ratio of the amount of light emitted by sub-pixels 21 of different colors the same, 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 is set to be greater than 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, and 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 is greater than 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.

[0122] Reference Fig.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 may 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 may 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 may be, for example, (L1+L2) / 2. In the embodiment of the present disclosure, (L3+L4) / 2 is set to be greater than (L2+L3) / 2, and (L2+L3) / 2 is set to be greater than (L1+L2) / 2, so as to ensure that after sub-pixels 21 of different colors are blocked by the viewing angle adjustment grating 4, the attenuation ratio of the amount of light emitted is the same, thereby avoiding the problem of color deviation.

[0123] For example, Fig.31 As shown, when the viewing angle adjustment grating 4 includes, for example, a first portion 41 and a second portion 42, for example, the heights of the first portions 41 located between sub-pixels 21 of different colors can be set to be the same, that is, the sizes of L1', L2', L3' and L4' can be the same. The height L7 of the second portion 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 portion 42 corresponding to the second color sub-pixel 212 along the direction perpendicular to the substrate 1, and the height L6 of the second portion 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 portion 42 corresponding to the third color sub-pixel 213 along the direction perpendicular to the substrate 1.

[0124] In addition, the heights of the first portions 41 located between the sub-pixels 21 of different colors may also be different, that is, the sizes of L1 ′, L2 ′, L3 ′ and L4 ′ may be 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 may 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 may 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 may be, for example, (L1'+L2'+L5) / 2. In the embodiment of the present disclosure, (L3'+L4'+L7) / 2 is set to be greater than (L2'+L3'+L6) / 2, and (L2'+L3'+L6) / 2 is set to be greater than (L1'+L2'+L5) / 2, so as to ensure that after sub-pixels 21 of different colors are blocked by the viewing angle adjustment grating 4, the attenuation ratio of the amount of light emitted is the same, thereby avoiding the problem of color deviation of the display panel 100.

[0125] In some embodiments, Fig.25 , Fig.26 , Fig.28 and Fig.29 For example, if the anti-peeping effect in the left and right directions is to be achieved, the height of the viewing angle adjustment grating 4 extending in the up-down direction can be increased, and the height of the viewing angle adjustment grating 4 extending in the left-right direction can be relatively reduced. Similarly, if the anti-peeping effect in the up-down direction is to be achieved, the height of the viewing angle adjustment grating 4 extending in the left-right direction can be increased, and the height of the viewing angle adjustment grating 4 extending in the up-down direction can be relatively reduced.

[0126] In some embodiments, in combination Figure 1 , Figure 2 , Fig.16 , Fig. 22 , Fig. 27 , Fig.30 and Fig.31 The touch layer 3 further includes a wiring structure 32 ; the wiring structure 32 , for example, may be located on a side of the grid-like touch electrodes 31 facing the substrate 1 ; an insulating layer 5 is provided between the wiring structure 32 and the grid-like touch electrodes 31 , and are electrically connected via vias 30 penetrating the insulating layer 5 .

[0127] Specifically, combined Figure 1 , Figure 2 , Fig.16 , Fig. 22 , Fig. 27 , Fig.30 and Fig.31The wiring structure 32 is used to transmit a touch driving signal to the grid-shaped touch electrode 31, or to transmit a touch sensing signal 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 , the lead-out of the wiring structure 32 is exemplarily shown, for example, it can be electrically connected to the control chip in the non-touch area. The wiring structure 32 and the grid-shaped touch electrode 31 are arranged in different layers, and an insulating layer 5 is arranged between the wiring structure 32 and the grid-shaped touch electrode 31, and a via 30 is arranged on the insulating layer 5, so that the wiring structure 32 and the grid-shaped touch electrode 31 are electrically connected through the via 30. Therefore, by arranging the wiring structure 32 and the grid-shaped touch electrode 31 in different layers, the problem of short circuit between the wiring structure 32 and the grid-shaped touch electrode 31 is avoided, which is conducive to simplifying the wiring difficulty of the touch layer 3.

[0128] In some embodiments, in combination Figure 1 and Figure 2 The wiring structure 32 is in a grid shape, 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 .

[0129] Specifically, combined Figure 1 and Figure 2 The material of the touch layer 3 can be, for example, molybdenum, aluminum, titanium, aluminum or titanium and other metal materials, which can be set according to the actual use requirements of the display panel 100, and the embodiment of the present disclosure does not limit this. Since the wiring structure 32 and the grid-shaped touch electrode 31 are both made of metal materials, in order to reduce the resistance of the touch layer 3, the wiring structure 32 can 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 arranged 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.

[0130] Fig.32 FIG. 1 is a schematic diagram of a cross-sectional structure of another display panel provided in an embodiment of the present disclosure. Fig.32 As shown, 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 are electrically connected to the light-emitting units 24 in a one-to-one correspondence; the driving circuit layer 22 is located between the substrate 1 and the light-emitting element layer 23.

[0131] Specifically, Fig.32As shown, 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-arranged pixel driving circuit. The 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 article, "2T1C circuit" refers to a pixel circuit that includes two thin-film transistors (T) and one capacitor (C). Other "7T1C circuits", "7T2C circuits", etc. are deduced by analogy. The specific working principle is well known to those skilled in the art and will not be elaborated here. The film layer structure in the driving circuit layer 22 is not limited to Fig.32 The film layer structure shown in the figure is not specifically limited in the embodiments of the present disclosure.

[0132] The display layer 2 further includes a light emitting element layer 23, which is located on the side of the driving circuit layer 22 away from the substrate 1. The display panel 100 provided in this embodiment may be a display panel 100 using an organic light emitting diode 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 a plurality of light emitting units 24. Figures 1 to 31 The sub-pixel 21 in the embodiment may include Fig.32 The light-emitting unit 24 in the display panel. The basic structure of the light-emitting unit 24 includes an anode 241, a light-emitting material layer 242 and a cathode 243. When the power supply supplies an appropriate voltage, the holes of the anode 241 and the electrons of the cathode 243 will combine in the light-emitting material layer 242 to generate bright light, and the light-emitting unit 24 can emit light of different colors based on the different properties of the light-emitting material layer 242. Compared with thin-film field-effect transistor liquid crystal displays, the OLED display panel 100 has the characteristics of high visibility and high brightness, and is more power-saving, light in weight and thin in thickness. Of course, in some other embodiments of the present disclosure, the display panel 100 may also be a display panel 100 using inorganic light-emitting diode display technology, such as a Micro LED display panel 100, or a Mini LED display panel 100, etc.

[0133] The display panel 100 provided by the embodiment of the present disclosure is provided with a viewing angle adjustment grating 4 on the side of the grid-shaped touch electrode 31 away from the display layer 2, and the vertical projection of the viewing angle adjustment grating 4 on the substrate 1 overlaps with the vertical projection of at least part of the grid-shaped touch electrode 31 on the substrate 1. The viewing angle adjustment grating 4 is used to block the light emitted by the sub-pixel 21 in the display layer 2, thereby achieving the purpose of anti-peeping and reducing the viewing angle of the display panel 100. No additional anti-peeping film is required, which can simplify the preparation process of the display panel 100 and reduce the production cost on the one hand, and reduce the film layer of the display device on the other hand, which is conducive to the thinness of the display device and avoids the problem that the anti-peeping film is easy to be damaged and the anti-peeping effect cannot be achieved after damage.

[0134] Based on the same inventive concept, the embodiment of the present disclosure also provides a display device, including a display panel as in any one of the above display panel embodiments. Therefore, the display device has the technical features of the display panel provided in the embodiment of the present disclosure, and can achieve the beneficial effects of the display panel provided in the embodiment of the present disclosure. For the similarities, refer to the above description of the display panel provided in the embodiment of the present disclosure, and no further description is given here.

[0135] For example, Fig.33 Schematic diagram of a display device provided by an embodiment of the present disclosure. Fig.33 As shown, the display device provided by the embodiment of the present disclosure includes the display panel 100 provided by any of the above embodiments of the present disclosure. Fig.33 The embodiment only takes 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 a display function, including but not limited to the following categories: mobile phones, televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc. The embodiment of the present invention does not make special limitations on this.

[0136] The display device provided by the embodiment of the present disclosure includes the above-mentioned display panel, and thus can solve the same technical problems as the above-mentioned display panel embodiment and achieve the same technical effects, which will not be repeated here.

[0137] The embodiments of the present disclosure also provide a method for preparing a display panel, which is used to prepare any of the display panels provided in the above embodiments and can achieve corresponding beneficial effects. The similarities can be understood by referring to the explanation of the display panel above and will not be repeated here.

[0138] The display panel, display device and method for preparing the display panel provided by the embodiments of the present disclosure include a substrate; a display layer, the display layer is located on one side of the substrate, and the display layer includes a plurality of sub-pixels; a touch layer, the touch layer is located on the side of the display layer away from the substrate, and the touch layer includes a grid-like touch electrode; a viewing angle adjustment grating, the viewing angle adjustment grating is in contact with a side of the grid-like touch electrode 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 part of the grid-like touch electrode on the substrate. Thus, by providing a viewing angle adjustment grating on the side of the grid-like touch electrode away from the display layer, the viewing angle adjustment grating is used to block the light emitted by the display layer, thereby achieving the purpose of anti-peeping and reducing the viewing angle of the display panel. There is no need to add an additional anti-peeping film, which can simplify the preparation process of the display panel on the one hand, and reduce the film layer of the display device on the other hand, which is conducive to the thinness of the display device, and also avoids the problem that the anti-peeping film attached to the display panel is easy to be damaged, and the display device cannot achieve the anti-peeping effect after damage.

[0139] It should be noted that, in this article, relational terms such as "first" and "second" are only used 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 "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0140] The above are only specific embodiments of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that: include: substrate; A display layer, the display layer is located on one side of the substrate, and the display layer includes a plurality of sub-pixels; A touch layer, the touch layer is located on a side of the display layer away from the substrate, and the touch layer includes a grid-shaped touch electrode; A viewing angle adjustment grating is in contact with a side of the grid-shaped touch electrode facing away from the display layer; a vertical projection of the viewing angle adjustment grating on the substrate overlaps with a vertical projection of at least part of the grid-shaped touch electrode on the substrate.

2. The display panel according to claim 1, characterized in that: The viewing angle adjustment grating and the grid-shaped touch electrodes are synchronously formed by photolithography.

3. The display panel according to claim 2, characterized in that: The viewing angle adjustment grating is in a grid shape, and a vertical projection of the viewing angle adjustment grating on the substrate covers a vertical projection of the grid-shaped touch electrodes on the substrate.

4. The display panel according to claim 1, characterized in that: The display panel includes a first side and a second side, and the first side and the second side have an included angle; the viewing angle adjustment grating includes a first portion, and an extension direction of the first portion is parallel to the first side or the second side.

5. The display panel according to claim 4, characterized in that: The viewing angle adjustment grating further includes a second portion, a vertical projection of the second portion on the substrate partially overlapping with a vertical projection of the sub-pixel on the substrate.

6. The display panel according to claim 5, characterized in that: An extending direction of the second portion is parallel to an extending direction of the first portion.

7. The display panel according to claim 5, characterized in that: An extending direction of the second portion and an extending direction of the first portion have an included angle.

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

9. The display panel according to claim 1, characterized in that: Along a direction perpendicular to the substrate, the heights of the viewing angle adjustment gratings corresponding to sub-pixels of the same color are the same.

10. The display panel according to claim 1, characterized in that: The sub-pixels of different areas correspond to different vertical projection areas of the viewing angle adjustment grating on the substrate; Wherein, 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, characterized in that: Along a direction perpendicular to the substrate, the heights of the viewing angle adjustment gratings corresponding to the sub-pixels of different areas are 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, characterized in that: The touch layer further includes a wiring structure; the wiring structure is located on a side of the grid-shaped touch electrodes facing the substrate; an insulating layer is provided between the wiring structure and the grid-shaped touch electrodes, and the wiring structure and the grid-shaped touch electrodes are electrically connected through vias.

13. The display panel according to claim 12, characterized in that: The wiring structure is in a grid shape, and a vertical projection of the wiring structure on the substrate overlaps with a vertical projection of the grid-shaped touch electrodes on the substrate.

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

15. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-14.

16. A method for preparing a display panel, characterized in that: include: forming a substrate; forming a display layer on one side of the substrate, the display layer comprising a plurality of sub-pixels; forming a touch material layer on a side of the display layer facing away from the substrate; forming a photoresist layer on a side of the touch material layer away from the display layer, and exposing the photoresist layer to form a photoresist pattern; Forming at least a portion of the grid-shaped touch electrodes 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: The step of retaining at least a portion of the photoresist pattern as a viewing angle adjustment grating comprises: Stripping the photoresist layer parallel to the first side of the display panel to form a viewing angle adjustment grating; Alternatively, the photoresist layer parallel to the second side of the display panel is peeled off to form a viewing angle adjustment grating; Wherein, the first side and the second side have an included angle.

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