Display panel and display device

Abstract

The utility model provides a display panel and a display device. The display panel comprises a display substrate; the first cover plate is arranged on the display substrate; the second cover plate is arranged on one side, far away from the display substrate, of the first cover plate; the polaroid is arranged on the side, away from the display substrate, of the second cover plate, the orthographic projection of the polaroid on the display substrate covers the orthographic projection of the first cover plate on the display substrate and is located in the orthographic projection of the second cover plate on the display substrate, and therefore the size of the polaroid is smaller than that of the second cover plate; the risk that the side face of the polaroid is damaged can be reduced as much as possible, meanwhile, the size of the polaroid is larger than that of the first cover plate, the peripheral edge of the first cover plate is completely covered with the polaroid, the situation that light leaks from the peripheral edge is avoided, and the problem that light leaks from the peripheral edge of the cover plate is thoroughly solved.

Description

Technical Field

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

[0002] With the development of Extended Reality (XR) and Mixed Reality (MR) industries, a layer of polarizer (POL) is pasted on the surface of the display module to reduce the impact of reflected light in the environment and improve the screen contrast. However, due to the influence of existing processes, the shape of POL is always slightly smaller than the cover glass, which makes it impossible to completely avoid the light leakage problem. Utility Model Content

[0003] In view of this, an object of the present application is to provide a display panel and a display device.

[0004] Based on the above objectives, the first aspect of the present application provides a display panel, including:

[0005] Display substrate;

[0006] A first cover plate, disposed on the display substrate;

[0007] A second cover plate, disposed on a side of the first cover plate away from the display substrate;

[0008] A polarizer is disposed on a side of the second cover plate away from the display substrate, wherein the orthographic projection of the polarizer on the display substrate covers the orthographic projection of the first cover plate on the display substrate and is located within the orthographic projection of the second cover plate on the display substrate.

[0009] Optionally, the first cover plate includes a plurality of first cover plate edges, and orthographic projections of the plurality of first cover plate edges on the display substrate are all located within the orthographic projection of the polarizer on the display substrate.

[0010] Optionally, the first cover plate includes a plurality of first cover plate edges, the plurality of first cover plate edges include a first target edge and a plurality of first non-target edges, and the orthographic projections of the plurality of first non-target edges on the display substrate are all located within the orthographic projections of the polarizer on the display substrate.

[0011] Optionally, the polarizer includes a first edge, the first edge is arranged corresponding to the first target edge, and an orthographic projection of the first target edge on the display substrate at least partially overlaps with an orthographic projection of the first edge on the display substrate.

[0012] Optionally, the polarizer also includes a plurality of second edges, and the plurality of second edges are arranged in one-to-one correspondence with the plurality of first non-target edges, and the distance between the orthographic projection of each second edge on the display substrate and the orthographic projection of the corresponding first non-target edge on the display substrate is greater than or equal to 0.2 mm.

[0013] Optionally, the second cover plate includes a second target edge, the second target edge is arranged corresponding to the first target edge, and an orthographic projection of the second target edge on the display substrate at least partially overlaps with an orthographic projection of the first target edge on the display substrate.

[0014] Optionally, the orthographic projections of a plurality of the first non-target edges on the display substrate are all located within the orthographic projection of the second cover plate on the display substrate.

[0015] Optionally, the second cover plate also includes a plurality of second non-target edges, and the plurality of second non-target edges are arranged in one-to-one correspondence with the plurality of first non-target edges, and the distance between the orthographic projection of each second non-target edge on the display substrate and the orthographic projection of the corresponding first non-target edge on the display substrate is greater than or equal to 0.5 mm.

[0016] Optionally, a side glue layer is further included, wherein the side glue layer is arranged on the periphery of the display substrate and the first cover plate, and the side glue layer is connected to a side of the second cover plate close to the display substrate.

[0017] Optionally, a side glue layer is further included, and the side glue layer is arranged on the periphery of the display substrate, the first cover plate, the second cover plate and the polarizer.

[0018] Optionally, a distance between an upper surface of the side glue layer and an upper surface of the second cover plate is smaller than a distance between an upper surface of the polarizer and an upper surface of the second cover plate.

[0019] A second aspect of the present application provides a display device, comprising the display panel described in any one of the first aspects above.

[0020] From the above description, it can be seen that the display panel and display device provided by the present application, by adding a second cover plate and controlling the size of the polarizer, make the orthographic projection of the polarizer on the display substrate cover the orthographic projection of the first cover plate on the display substrate and be located within the orthographic projection of the second cover plate on the display substrate. In this way, the size of the polarizer is smaller than the size of the second cover plate, which can minimize the risk of damage to the side of the polarizer. At the same time, the size of the polarizer is larger than the size of the first cover plate, so that the edges of the first cover plate are completely covered by the polarizer, and light leakage around the edges will no longer occur, which completely solves the problem of light leakage around the cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 is a cross-sectional schematic diagram of a display panel in the related art;

[0023] Figure 2 A first cross-sectional schematic diagram of a display panel according to an embodiment of the present application;

[0024] Figure 3 This is a first front perspective view of the display panel of the embodiment of the present application when it is placed forward;

[0025] Figure 4 is a cross-sectional schematic diagram of a display substrate according to an embodiment of the present application;

[0026] Figure 5a A second front perspective view of the display panel of the embodiment of the present application when placed forward;

[0027] Figure 5b This is a third front perspective view when the display panel of the embodiment of the present application is placed forward;

[0028] Figure 6 A second cross-sectional schematic diagram of a display panel according to an embodiment of the present application;

[0029] Figure 7 This is a third front perspective view when the display panel of the embodiment of the present application is placed forward;

[0030] Figure 8 A third cross-sectional schematic diagram of a display panel according to an embodiment of the present application;

[0031] Fig. 9 A first cross-sectional schematic diagram of a process for preparing a display panel according to an embodiment of the present application;

[0032] Fig.10 This is a first front perspective view of the display panel of the embodiment of the present application when it is placed forward during the preparation process;

[0033] Fig.11 A second cross-sectional schematic diagram of the manufacturing process of the display panel according to the embodiment of the present application;

[0034] Fig.12 A second front perspective view of the display panel of the embodiment of the present application when placed forward during the preparation process;

[0035] Fig.13 A third cross-sectional schematic diagram of the manufacturing process of the display panel according to the embodiment of the present application;

[0036] Fig.14 This is a fourth front perspective view of the display panel of the embodiment of the present application when it is placed forward during the preparation process;

[0037] Fig.15 A third cross-sectional schematic diagram of the manufacturing process of the display panel according to the embodiment of the present application;

[0038] Fig.16 This is a fourth front perspective view of the display panel of an embodiment of the present application when placed forward during the preparation process.

[0039] In the figure: 001, silicon display substrate; 002, side plastic frame; 003, packaging layer; 004, cover glass; 005, polarizer; 006, flexible circuit board;

[0040] 1. Display substrate; 11. Base; 12. Thin film transistor; 121. Active layer; 122. Gate electrode; 123. Source electrode; 124. Drain electrode; 13. Gate insulating layer; 14. Interlayer insulating layer; 15. Passivation layer; 16. Light-emitting element; 161. First electrode; 162. Light-emitting layer; 163. Second electrode; 17. Pixel defining layer; 18. Encapsulation layer;

[0041] 2. First cover plate; 21. First cover plate edge; 211. First target edge; 212. First non-target edge; 3. Second cover plate; 31. Second target edge; 32. Second non-target edge; 4. Polarizer; 41. First edge; 42. Second edge; 43. Upper surface of polarizer; 5. Side glue layer; 51. Upper surface of side glue layer; 6. Flexible circuit board. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0043] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] With the development of XR and MR industries, more and more products are beginning to use micro organic light emitting diode (MicroOLED) display modules as near-eye display modules. The commonly used Micro OLED module architecture is usually a silicon display substrate 001, a packaging layer 003, a cover glass 004, and a flexible circuit board 006 (FPC) / printed circuit board (PCB) binding. Figure 1 As shown, since the cover glass 004 is transparent as a whole, light leakage is inevitable at the edges. Therefore, a layer of dark glue is often applied to the side to form a side glue frame 002. The glue coating height is slightly lower than the upper surface of the cover glass 004 to reduce light leakage. In addition, in order to reduce the impact of reflected light in the environment and improve the contrast of the picture, a layer of polarizer 005 needs to be attached to the surface of the cover glass 004. Since the strength of the polarizer 005 is lower than that of the cover glass 004, in order to reduce the risk of damage to the side of the polarizer 005, the shape of the polarizer 005 is often smaller than that of the cover glass 004, which leads to the problem of light leakage at the edges of the module.

[0045] Therefore, it is urgent to solve the problem of light leakage around the edges of the module while reducing the risk of damage to the side of the polarizer 005.

[0046] Based on this, see Figure 2 and Figure 3 , the present application provides a display panel, comprising:

[0047] Display substrate 1;

[0048] A first cover plate 2, disposed on the display substrate 1;

[0049] A second cover plate 3, arranged on a side of the first cover plate 2 away from the display substrate 1;

[0050] The polarizer 4 is arranged on the side of the second cover plate 3 away from the display substrate 1 , and the orthographic projection of the polarizer 4 on the display substrate 1 covers the orthographic projection of the first cover plate 2 on the display substrate 1 and is located within the orthographic projection of the second cover plate 3 on the display substrate 1 .

[0051] Specifically, Figure 4 As shown, the display substrate 1 includes a substrate 11, a thin film transistor 12, a light emitting element 16 and an encapsulation layer 18. The display substrate 1 can be implemented as a top emission type light emitting display device.

[0052] The substrate 11 may support and protect various components of the display substrate 1. The substrate 11 may be formed of glass, quartz, ceramic, or a flexible plastic material. For example, when the substrate 11 is formed of a plastic material, it may be formed of polyimide (PI). However, the embodiments of the present disclosure are not limited thereto.

[0053] The base 11 may be flexible, stretchable, foldable, bendable and / or rollable, so the display substrate 1 may also be flexible, stretchable, foldable, bendable and / or rollable.

[0054] The substrate 11 includes a display area AA region and a non-display area NA region.

[0055] The display region is a region where an image is displayed in the display substrate 1. In the display region, the light emitting element 16 and various driving elements for driving the light emitting element 16 may be provided. For example, the light emitting element 16 may include a first electrode 161, a light emitting layer 162, and a second electrode 163. In addition, various elements such as wiring, a capacitor, or a thin film transistor 12 for driving the light emitting element 16 may be provided in the display region.

[0056] The display area may include a plurality of sub-pixels arranged in an array. A sub-pixel is the smallest unit for configuring a screen, and each of the plurality of sub-pixels may include a light-emitting element 16 and a driving circuit. Each of the plurality of sub-pixels may emit light of different wavelengths. For example, the plurality of sub-pixels may include a red sub-pixel, a green sub-pixel, and a blue sub-pixel. However, the plurality of sub-pixels are not limited thereto and may also include a white sub-pixel.

[0057] The driving circuit of the sub-pixel is a circuit for controlling the driving of the light emitting element 16. For example, the driving circuit may be configured to include the thin film transistor 12 and a capacitor, but is not limited thereto.

[0058] The non-display area is an area where no image is displayed, and various components for driving the plurality of sub-pixels provided in the display area may be provided. For example, a driver providing signals for driving the plurality of sub-pixels, a flexible film, etc. may be provided in the non-display area.

[0059] The non-display area may be an area surrounding the display area, but is not limited thereto. For example, the non-display area may be an area extending from the display area.

[0060] The thin film transistor 12 is disposed on the substrate 11 . The thin film transistor 12 may be a driving element for displaying the display substrate 1 . The thin film transistor 12 includes an active layer 121 , a gate electrode 122 , a source electrode 123 , and a drain electrode 124 .

[0061] The active layer 121 is disposed on the substrate 11. The active layer 121 may be made of amorphous, polycrystalline semiconductor materials, oxide semiconductors or organic semiconductor materials. In addition, the active layer 121 includes a channel region in which impurities are not doped, and a source region and a drain region disposed on opposite sides of the communication region and doped with impurities.

[0062] The gate insulating layer is provided on the active layer 121. The gate insulating layer is a layer for electrically insulating the gate electrode 122 from the active layer 121, and may be formed of an insulating material. For example, the gate insulating layer may be formed of silicon nitride (SiN x ) or silicon oxide (SiO x ) or formed into a single layer of silicon nitride (SiN x ) or silicon oxide (SiO x ) layers, but the implementation is not limited thereto.

[0063] The gate electrode 122 is disposed on the gate insulating layer. The gate electrode 122 may overlap at least some of the active layer 121 and may overlap the channel region. The gate electrode 122 may be any one of a variety of metal materials, for example, any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy of two or more thereof, or a multilayer thereof, but the embodiment is not limited thereto.

[0064] The interlayer insulating layer 14 is disposed on the gate electrode 122 and the gate insulating layer. The interlayer insulating layer 14 may be made of an inorganic insulating material or an organic insulating material.

[0065] A contact hole (not marked in the figure) overlapping at least a portion of the active layer 121 is formed in the gate insulating layer and the interlayer insulating layer 14 .

[0066] The source electrode and the drain electrode are disposed on the interlayer insulating layer 14. The source electrode and the drain electrode are disposed on the same layer and are spaced apart from each other. In addition, the source electrode and the drain electrode are respectively connected to the source region and the drain region of the active layer 121 through contact holes. The source electrode and the drain electrode may be formed of any one or more of a variety of metal materials, for example, any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd) and copper (Cu), or an alloy of two or more thereof, or a multilayer thereof, but the embodiment is not limited thereto.

[0067] As described above, the active layer 121 , the gate electrode 122 , the source electrode, and the drain electrode constitute one thin film transistor 12 .

[0068] The structure of the thin film transistor 12 is not limited to the aforementioned example and can be modified to various optional structures. The light emitting diode display may include a switching transistor and a driving transistor, and the aforementioned thin film transistor 12 may be a driving transistor. Although not shown, a switching thin film transistor 12 may be provided.

[0069] The passivation layer 15 is disposed on the thin film transistor 12 and the interlayer insulating layer 14. The passivation layer 15 is used to remove and / or flatten the steps of the aforementioned structure, thereby increasing the light emitting efficiency of the light emitting element 16 to be formed thereon. A contact hole overlapping at least some of the drain electrode is formed in the passivation layer 15.

[0070] The passivation layer 15 may be formed of polyacrylate resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene resin, polyphenylene sulfide resin, and / or benzocyclobutene (BCB).

[0071] The array-arranged light emitting elements 16 are disposed on the passivation layer 15. The light emitting elements 16 include a first electrode 161, a second electrode 163 disposed on the first electrode 161, and a light emitting layer 162 disposed between the first electrode 161 and the second electrode 163. Here, the light emitting elements 16 may be light emitting diodes or organic light emitting diodes.

[0072] The first electrode 161 is disposed on the passivation layer 15. The first electrode 161 may be formed of a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In2O3), etc., or of a metal such as lithium (Li), calcium (Ca), lithium fluoride / calcium (LiF / Ca), lithium fluoride / aluminum (LiF / Al), aluminum (Al), silver (Ag), magnesium (Mg), gold (Au), etc. The first electrode 161 is electrically connected to the drain electrode of the thin film transistor 12 via a contact hole formed in the passivation layer 15 to serve as an anode of the light emitting element 16.

[0073] The first electrode 161 may include a first transparent electrode and a second transparent electrode including a transparent conductive material, and a semi-transmissive layer disposed between the first transparent electrode and the second transparent electrode to form a microcavity together with the second electrode 163. For example, the first electrode 161 may be formed as a multilayer including a layer made of a transparent conductive material and a layer made of a reflective metal material.

[0074] The light emitting layer 162 is disposed on the first electrode 161. The light emitting layer 162 may include an emission layer, a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and / or an electron injection layer (EIL).

[0075] The light-emitting layer 162 is a layer for emitting light having a specific color, and the light-emitting layer 162 may include at least one or more of a red light-emitting layer 162 for emitting red light, a green light-emitting layer 162 for emitting green light, a blue light-emitting layer 162 for emitting blue light, and a white light-emitting layer 162 for emitting white light.

[0076] The white light emitting layer 162 described here may be formed as a single light emitting layer 162, or may be formed as a plurality of stacked light emitting layers 162, so that white light may be emitted. For example, a structure emitting white light by combining at least one yellow light emitting layer 162 and at least one blue light emitting layer 162, a structure emitting white light by combining at least one cyan light emitting layer 162 and at least one red light emitting layer 162, and a structure emitting white light by combining at least one magenta light emitting layer 162 and at least one green light emitting layer 162 may be included.

[0077] The second electrode 163 is disposed on the light emitting layer 162 and the pixel defining layer 17. The second electrode 163 may be formed of a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In2O3), etc., or a reflective metal such as lithium (Li), calcium (Ca), lithium fluoride / calcium (LiF / Ca), lithium fluoride / aluminum (LiF / Al), aluminum (Al), silver (Ag), magnesium (Mg), gold (Au), etc. The second electrode 163 serves as a cathode of the light emitting element 16.

[0078] The encapsulation layer 18 is disposed on the second electrode 163. The top surface of the second electrode 163 may be uneven. The portion of the second electrode 163 overlapping the pixel defining layer 17 may protrude beyond the other portions. This may be caused by the pixel defining layer 17 being thicker than the other constituent elements. The encapsulation layer 18 may be formed of a transparent organic material. For example, the encapsulation layer 18 may be formed of a polyacrylate resin, an epoxy resin, a phenolic resin, a polyamide resin, a polyimide resin, an unsaturated polyester resin, a polyphenylene resin, a polyphenylene sulfide resin and / or a benzocyclobutene (BCB).

[0079] The encapsulation layer 18 is formed thick enough so that its top surface can be flattened. When the substrate 11 is bent to implement a flexible display device, etc., the encapsulation layer 18 can be used to absorb impact transmitted to elements such as the thin film transistor 12, the first electrode 161 and the second electrode 163 to increase the safety of the elements.

[0080] The first cover plate 2 is disposed on a side of the encapsulation layer 18 away from the substrate 11. Exemplarily, the first cover plate 2 and the encapsulation layer 18 may be connected by an adhesive layer, and the first cover plate 2 is used to protect the display substrate 1.

[0081] The second cover plate 3 is disposed on a side of the first cover plate 2 away from the base 11. The orthographic projection of the second cover plate 3 on the display substrate 1 covers the orthographic projection of the first cover plate 2 on the display substrate 1.

[0082] The polarizer 4 is arranged on the side of the second cover plate 3 away from the base 11. Since the strength of the polarizer 4 is lower than that of the second cover plate 3, in order to reduce the risk of damage to the side of the polarizer 4, the size of the polarizer 4 is controlled to be smaller than the second cover plate 3, that is, the orthographic projection of the polarizer 4 on the display substrate 1 is located within the orthographic projection of the second cover plate 3 on the display substrate 1, so that the risk of damage to the side of the polarizer 4 can be reduced as much as possible.

[0083] Specifically, the orthographic projection of the polarizer 4 on the display substrate 1 is located within the orthographic projection of the second cover plate 3 on the display substrate 1. It can be that all orthographic projections of the polarizer 4 (including the orthographic projections of all edges) are located within the orthographic projection of the second cover plate 3, that is, the size of the second cover plate 3 is one circle larger than the size of the polarizer 4; or the orthographic projection of part of the edge of the polarizer 4 coincides with the orthographic projection of part of the edge of the second cover plate 3, and the orthographic projections of other parts of the polarizer are all located within the orthographic projection of the second cover plate 3.

[0084] The orthographic projection of the polarizer 4 on the display substrate 1 covers the orthographic projection of the first cover plate 2 on the display substrate 1, that is, the polarizer 4 can completely cover the four edges of the first cover plate 2, so that the four edges of the first cover plate 2 are completely covered by the polarizer 4, and there will be no light leakage at the four edges.

[0085] In the present application, by adding the second cover plate 3 and controlling the size of the polarizer 4, the orthographic projection of the polarizer 4 on the display substrate 1 covers the orthographic projection of the first cover plate 2 on the display substrate 1 and is located within the orthographic projection of the second cover plate 3 on the display substrate 1. In this way, the size of the polarizer 4 is smaller than the size of the second cover plate 3, which can minimize the risk of damage to the side of the polarizer 4. At the same time, the size of the polarizer 4 is larger than the size of the first cover plate 2, so that the edges of the first cover plate 2 are completely covered by the polarizer 4, and light leakage from the edges will no longer occur, which completely solves the problem of light leakage around the cover plate.

[0086] In some embodiments, see Figure 2 The first cover plate 2 includes a plurality of first cover plate 2 edges, and the orthographic projections of the plurality of first cover plate 2 edges on the display substrate 1 are all located within the orthographic projections of the polarizer 4 on the display substrate 1 .

[0087] Specifically, the orthographic projections of the edges of the multiple first cover plates 2 on the display substrate 1 are all located within the orthographic projections of the polarizer 4 on the display substrate 1, which can ensure that the four edges of the first cover plate 2 are completely covered by the polarizer 4, and there will be no light leakage around the edges, which can completely solve the problem of light leakage around the cover plate.

[0088] In some embodiments, Figure 5a As shown, the first cover plate 2 includes multiple first cover plate 2 edges, and the multiple first cover plate 2 edges include a first target edge 211 and multiple first non-target edges 212, and the orthographic projections of the multiple first non-target edges 212 on the display substrate 1 are all located within the orthographic projections of the polarizer 4 on the display substrate 1.

[0089] Specifically, the first target edge 211 may be any edge of the first cover plate 2, and the first non-target edge 212 may be all other cover plate edges of the first cover plate 2 except the first target edge 211. For example, when the display panel is placed in the forward direction, the cover plate edge of the first cover plate 2 close to the ground may be the first target edge 211, and the cover plate edge of the first cover plate 2 away from the ground and the cover plate edges on the left and right sides may be the first non-target edge 212. The side close to the ground, i.e. Figure 5a The lower middle side.

[0090] When the display panel is used normally, it is placed in the forward direction. Figure 5aAs shown, when placed forward, if light leakage occurs at the upper edge, left edge, and right edge of the display panel, it will cause obvious stimulation to the user's eyes, which will greatly reduce the user's visual experience. Therefore, in the present application, the orthographic projections of the plurality of first non-target edges 212 on the display substrate 1 are all located within the orthographic projections of the polarizer 4 on the display substrate 1, so that the upper cover plate edge, left cover plate edge, and right cover plate edge of the first cover plate 2 are ensured to be completely covered by the polarizer 4, and the upper cover plate edge, left cover plate edge, and right cover plate edge of the first cover plate 2 are ensured to not leak light, thereby avoiding reducing the user's visual experience.

[0091] In some embodiments, see Figure 5a The polarizer 4 includes a first edge 41, and the first edge 41 is arranged corresponding to the first target edge 211, and the orthographic projection of the first target edge 211 on the display substrate 1 at least partially overlaps with the orthographic projection of the first edge 41 on the display substrate 1.

[0092] Specifically, as mentioned above, when the display panel is placed forward, the cover edge of the first cover plate 2 close to the ground can be the first target edge 211 , and correspondingly, the edge of the polarizer 4 close to the ground is the first edge 41 .

[0093] Since the light leakage at the bottom edge of the display panel will not have much impact on the user's visual experience when the display panel is placed forward, in order to facilitate the assembly and placement of the display panel, the orthographic projection of the first target edge 211 on the display substrate 1 is set to at least partially overlap with the orthographic projection of the first edge 41 on the display substrate 1. In this way, the overlapping first target edge 211 and the first edge 41 are stacked, and the ends of the two edges close to the ground are aligned, which is convenient for the assembly and placement of the display panel, beneficial to the actual use of the display panel, and will not affect the user's visual experience; at the same time, since the orthographic projection of the entire polarizer 4 on the display substrate 1 is located within the orthographic projection of the second cover plate 3 on the display substrate 1, that is, the orthographic projection of the first edge 41 on the display substrate 1 is also located within the orthographic projection of the second cover plate 3 on the display substrate 1, even if the first edge 41 and the first target edge 211 overlap, the second cover plate 3 will protect the first edge 41 to prevent the side of the first edge 1 from being damaged.

[0094] In some embodiments, see Figure 5a The polarizer 4 also includes a plurality of second edges 42, and the plurality of second edges 42 are arranged in one-to-one correspondence with the plurality of first non-target edges 212, and the distance between the orthographic projection of each second edge 42 on the display substrate 1 and the orthographic projection of the corresponding first non-target edge 212 on the display substrate 1 is greater than or equal to 0.2 mm.

[0095] Specifically, the distance between the orthographic projection of each second edge 42 on the display substrate 1 and the orthographic projection of the corresponding first non-target edge 212 on the display substrate 1 is greater than or equal to 0.2 mm, so that the edge of the first polarizer 4 and the edge of the first cover plate 2 have a certain distance, which can ensure that each first non-target edge 212 is completely covered and no light leakage occurs.

[0096] At the same time, the distance of 0.2 mm also allows for some manufacturing errors. If the distance between the two edges is too small, a first non-target edge 212 may not be completely covered due to the manufacturing error, resulting in light leakage.

[0097] The distance between the orthographic projection of each second edge 42 on the display substrate 1 and the orthographic projection of the corresponding first non-target edge 212 on the display substrate 1 is less than 0.5 mm, ensuring that the second edge 42 does not extend beyond the second cover plate 3 to minimize the risk of damage to the side of the polarizer 4.

[0098] In some embodiments, see Figure 5b The second cover plate 3 includes a second target edge 31, and the second target edge 31 is arranged corresponding to the first target edge 211, and the orthographic projection of the second target edge 31 on the display substrate 1 at least partially overlaps with the orthographic projection of the first target edge 211 on the display substrate 1.

[0099] Specifically, as mentioned above, when the display panel is placed forward, the edge of the first cover plate 2 close to the ground can be the first target edge 211, and correspondingly, the edge of the polarizer 4 close to the ground is the first edge 41, and the edge of the second cover plate 3 close to the ground is the second target edge 31.

[0100] The orthographic projection of the second target edge 31 on the display substrate 1 at least partially overlaps with the orthographic projection of the first target edge 211 on the display substrate 1, so that the overlapping first target edge 211, the second target edge 31 and the first edge 41 are stacked, and the ends of the three close to the ground are aligned, which is convenient for the assembly and placement of the display panel and is beneficial to the actual use of the display panel; at the same time, practical experience shows that in actual use, the probability of the side of the display panel close to the ground being hit is very small, that is, the probability of the first edge 41 being damaged on the side is very small, so in the actual preparation process, the first target edge 211, the second target edge 31 and the first edge 41 are allowed to overlap, so that in the actual preparation process, the positioning and installation of the second cover plate 3 and the polarizer 4 are facilitated, which can reduce the difficulty of the preparation process.

[0101] In some embodiments, see Figure 5a and Figure 5b , the orthographic projections of the plurality of first non-target edges 212 on the display substrate 1 are all located within the orthographic projection of the second cover plate 3 on the display substrate 1, the second cover plate 3 also includes a plurality of second non-target edges 32, and the plurality of second non-target edges 32 are arranged one-to-one with the plurality of first non-target edges 212, and the distance between the orthographic projection of each second non-target edge 32 on the display substrate 1 and the orthographic projection of the corresponding first non-target edge 212 on the display substrate 1 is greater than or equal to 0.5 mm.

[0102] Specifically, the distance between the orthographic projection of each of the second non-target edges 32 on the display substrate 1 and the orthographic projection of the corresponding first non-target edge 212 on the display substrate 1 is greater than or equal to 0.5 mm, so that there is a large distance between the edge of the second cover plate 3 and the edge of the first cover plate 2, which is convenient for the setting of the polarizer 4, ensuring that the polarizer 4 can completely cover the first cover plate 2 and ensure that the polarizer 4 does not exceed the second cover plate 3, thereby reducing the risk of side damage to the polarizer 4.

[0103] In some embodiments, see Figure 6 and Figure 7 As shown, the display panel also includes a side glue layer 5, and the side glue layer 5 is arranged on the periphery of the display substrate 1 and the first cover plate 2. The side glue layer 5 is connected to the side of the second cover plate 3 close to the display substrate 1. In this way, by setting the side glue frame 002, on the one hand, the edges around the first cover plate 2 can be further covered to avoid light leakage, and on the other hand, the periphery of the display substrate 1 and the first cover plate 2 can be protected to avoid damage.

[0104] At the same time, since the size of the second cover plate 3 is larger than that of the first cover plate 2, and the side glue layer 5 is connected to the side of the second cover plate 3 close to the display substrate 1, the second cover plate 3 can be pre-positioned during the actual side glue coating process to improve the accuracy of the side glue coating, thereby solving the problem of poor side glue coating accuracy and difficulty in positioning by shape in conventional assembly.

[0105] In some embodiments, see Figure 8 The display panel also includes a side glue layer 5, and the side glue layer 5 is arranged on the periphery of the display substrate 1, the first cover plate 2, the second cover plate 3 and the polarizer 4. In this way, by setting the side glue frame 002, the periphery of the first cover plate 2 and the polarizer 4 can be further covered, further preventing the polarizer 4 around the first cover plate 2 from leaking out around the periphery or the outer edge.

[0106] In some embodiments, see Figure 8, a distance between an upper surface 51 of the side glue layer 5 and an upper surface of the second cover plate 3 is smaller than a distance between an upper surface 43 of the polarizer 4 and an upper surface of the second cover plate 3 .

[0107] Specifically, the upper surface refers to the surface away from the display substrate 1 .

[0108] The distance between the upper surface 51 of the side glue layer 5 and the upper surface of the second cover plate 3 is smaller than the distance between the upper surface 43 of the polarizer 4 and the upper surface of the second cover plate 3, that is, compared with the same reference plane, the upper surface 43 of the polarizer 4 is higher than the upper surface 51 of the side glue layer 5, that is, the top surface of the side glue layer 5 is slightly lower than the top surface of the polarizer 4, so that the glue can be prevented from overflowing to the top surface of the polarizer 4 during the production of the side glue layer 5, causing the influence of module contamination.

[0109] The present application also provides a method for preparing a display panel, comprising:

[0110] Step S100, providing a display substrate 1;

[0111] Step S200, manufacturing a first cover plate 2 on the display substrate 1;

[0112] Step S300, disposing a second cover plate 3 on a side of the first cover plate 2 away from the display substrate 1;

[0113] Step S400, disposing a polarizer 4 on a side of the second cover plate 3 away from the display substrate 1, wherein the orthographic projection of the polarizer 4 on the display substrate 1 covers the orthographic projection of the first cover plate 2 on the display substrate 1 and is located within the orthographic projection of the second cover plate 3 on the display substrate 1.

[0114] Specifically, when preparing a display substrate, there are two preparation processes:

[0115] Preparation process 1:

[0116] First, a display substrate 1 is provided, and a first cover plate 2 is manufactured on the display substrate 1. Fig. 9 and Fig.10 shown.

[0117] Secondly, a second cover plate 3 is arranged on a side of the first cover plate 2 away from the display substrate 1, and the second cover plate 3 completely covers the first cover plate 2. Fig.11 and Fig.12 shown.

[0118] Next, a side glue layer 5 is formed on the periphery of the display substrate 1 and the first cover plate 2, so that the side glue layer 5 is connected to the side of the second cover plate 3 close to the display substrate 1, as shown in FIG. Fig.13 and Fig.14 shown.

[0119] Finally, a polarizer 4 is disposed on a side of the second cover plate 3 away from the display substrate 1, and the orthographic projection of the polarizer 4 on the display substrate 1 covers the orthographic projection of the first cover plate 2 on the display substrate 1 and is located within the orthographic projection of the second cover plate 3 on the display substrate 1. Fig.16 shown.

[0120] By adopting the present preparation process, when manufacturing the side glue layer 5 , the second cover plate 3 can limit the side glue layer 5 , thereby facilitating the positioning of the side glue layer 5 and simplifying the preparation process.

[0121] Preparation process 2:

[0122] First, a display substrate 1 is provided, and a first cover plate 2 is manufactured on the display substrate 1. Fig. 9 and Fig.10 shown.

[0123] Secondly, a second cover plate 3 is arranged on a side of the first cover plate 2 away from the display substrate 1, and the second cover plate 3 completely covers the first cover plate 2. Fig.11 and Fig.12 shown.

[0124] Next, a polarizer 4 is arranged on the side of the second cover plate 3 away from the display substrate 1, and the orthographic projection of the polarizer 4 on the display substrate 1 covers the orthographic projection of the first cover plate 2 on the display substrate 1 and is located within the orthographic projection of the second cover plate 3 on the display substrate 1. Fig.11 As shown;

[0125] Finally, a side glue layer 5 is disposed on the periphery of the display substrate 1, the first cover plate 2, the second cover plate 3 and the polarizer 4, and the distance between the upper surface of the side glue layer 5 and the upper surface of the second cover plate 3 is smaller than the distance between the upper surface of the polarizer 4 and the upper surface of the second cover plate 3. Fig.15 shown.

[0126] By adopting this preparation process, the side glue layer 5 can further shield the edges of the first cover plate 2 and the second cover plate 3 to further prevent light leakage from the edges; at the same time, the side glue layer 5 can also protect the side of the polarizer 4 to reduce the probability of damage to the side of the polarizer 4.

[0127] In the preparation method of the present application, by adding the second cover plate 3 and controlling the size of the polarizer 4, the orthographic projection of the polarizer 4 on the display substrate 1 covers the orthographic projection of the first cover plate 2 on the display substrate 1 and is located within the orthographic projection of the second cover plate 3 on the display substrate 1. In this way, the size of the polarizer 4 is smaller than the size of the second cover plate 3, which can minimize the risk of damage to the side of the polarizer 4. At the same time, the size of the polarizer 4 is larger than the size of the first cover plate 2, so that the edges of the first cover plate 2 are completely covered by the polarizer 4, and light leakage from the edges will no longer occur, which completely solves the problem of light leakage around the cover plate.

[0128] The present application also provides a display device, comprising the display panel described in any one of the first aspects above.

[0129] The display device can be a product with an image display function, for example, it can be: a monitor, a television, a billboard, a digital photo frame, a laser printer with a display function, a telephone, a mobile phone, a personal digital assistant (PDA), a digital camera, a portable camcorder, a viewfinder, a navigator, a vehicle, a large-area wall, a home appliance, an information query device (such as business query equipment and monitors of e-government, banks, hospitals, power and other departments).

[0130] The display device has the technical effects described in any of the above embodiments, which will not be elaborated here.

[0131] It should be noted that the above describes some embodiments of the present disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0132] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. Based on the concept of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present disclosure as described above, which are not provided in detail for the sake of simplicity.

[0133] The embodiments of the present disclosure are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A display panel, characterized in that: include: Display substrate; A first cover plate, disposed on the display substrate; A second cover plate, disposed on a side of the first cover plate away from the display substrate; A polarizer is disposed on a side of the second cover plate away from the display substrate, wherein the orthographic projection of the polarizer on the display substrate covers the orthographic projection of the first cover plate on the display substrate and is located within the orthographic projection of the second cover plate on the display substrate.

2. The display panel according to claim 1, characterized in that: The first cover plate includes a plurality of first cover plate edges, and the orthographic projections of the plurality of first cover plate edges on the display substrate are all located within the orthographic projection of the polarizer on the display substrate.

3. The display panel according to claim 1, characterized in that: The first cover plate includes a plurality of first cover plate edges, the plurality of first cover plate edges include a first target edge and a plurality of first non-target edges, and the orthographic projections of the plurality of first non-target edges on the display substrate are all located within the orthographic projections of the polarizer on the display substrate.

4. The display panel according to claim 3, characterized in that: The polarizer includes a first edge, the first edge is arranged corresponding to the first target edge, and the orthographic projection of the first target edge on the display substrate at least partially overlaps with the orthographic projection of the first edge on the display substrate.

5. The display panel according to claim 4, characterized in that: The polarizer also includes a plurality of second edges, and the plurality of second edges are arranged in one-to-one correspondence with the plurality of first non-target edges, and the distance between the orthographic projection of each second edge on the display substrate and the orthographic projection of the corresponding first non-target edge on the display substrate is greater than or equal to 0.2 mm.

6. The display panel according to claim 3, characterized in that: The second cover plate includes a second target edge, the second target edge is arranged corresponding to the first target edge, and an orthographic projection of the second target edge on the display substrate at least partially overlaps with an orthographic projection of the first target edge on the display substrate.

7. The display panel according to claim 3, characterized in that: The orthographic projections of the plurality of first non-target edges on the display substrate are all located within the orthographic projection of the second cover plate on the display substrate.

8. The display panel according to claim 7, characterized in that: The second cover plate also includes a plurality of second non-target edges, and the plurality of second non-target edges are arranged one-to-one corresponding to the plurality of first non-target edges, and the distance between the orthographic projection of each second non-target edge on the display substrate and the orthographic projection of the corresponding first non-target edge on the display substrate is greater than or equal to 0.5 mm.

9. The display panel according to claim 1, characterized in that: It also includes a side glue layer, which is arranged on the outer periphery of the display substrate and the first cover plate, and is connected to a side of the second cover plate close to the display substrate.

10. The display panel according to claim 1, characterized in that: It also includes a side glue layer, which is arranged on the periphery of the display substrate, the first cover plate, the second cover plate and the polarizer.

11. The display panel according to claim 10, characterized in that: The distance between the upper surface of the side glue layer and the upper surface of the second cover plate is smaller than the distance between the upper surface of the polarizer and the upper surface of the second cover plate.

12. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 11.

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