Display module, preparation method thereof and display device

Abstract

The application provides a display module, a preparation method thereof and a display device. The display module comprises a display panel, wherein the display panel is provided with a hole; and a composite adhesive tape, which is at least partially located on a non-display side of the display panel, and comprises a waterproof layer, wherein the waterproof layer extends from the non-display side to the inside of the hole and covers the side wall of the hole enclosed by the display panel. The waterproof layer of the composite adhesive tape extends to the inside of the hole of the display panel and covers the side wall of the hole enclosed by the display panel, which can effectively prevent external moisture from entering the display panel, ensure the packaging effect of the display panel, and effectively avoid the black spot problem of the area where the hole of the display panel is located. Moreover, the waterproof layer almost does not affect the optical performance of the hole, so that the display module has excellent display effect.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to display modules, their manufacturing methods, and display devices. Background Technology

[0002] Current display devices, such as mobile phones, tablets, and wearable devices, have an increasing demand for flexible screens. When designing front-facing cameras for these devices, an under-display camera hole design is often used. This design involves laser-drilling holes in the flexible screen to meet the optical requirements of the camera module. However, after laser-drilling holes in the flexible screen, moisture can enter the screen's film layer through the edges of the holes during use, causing encapsulation failure and resulting in black spots. Summary of the Invention

[0003] In view of this, the present application provides a display module, a method for manufacturing the same, and a display device, which solves the black spot problem in the prior art display devices.

[0004] The first aspect of this application provides a display module, including:

[0005] The display panel has holes.

[0006] The composite tape is located at least partially on the non-display side of the display panel, and includes a waterproof layer extending from the non-display side into the hole to cover the sidewall of the display panel that encloses the hole.

[0007] In one embodiment, the waterproof layer includes at least one of scattering particles, optical adjustment materials, pigments, and dyes;

[0008] Preferably, the scattering particles include silica gel particles;

[0009] Preferably, the optical adjustment material includes optical adhesive;

[0010] Preferably, the optical adhesive includes black light-blocking adhesive;

[0011] Preferably, the waterproof layer includes hot melt adhesive;

[0012] Preferably, the hot melt adhesive includes at least one of ethylene-vinyl acetate copolymer, polyolefin copolymer, polyurethane, polyamide, and polyethersulfone;

[0013] Preferably, the hole includes at least one of the following: a hole corresponding to an infrared sensor, a hole corresponding to a camera, and a hole corresponding to a fingerprint recognition sensor.

[0014] In one embodiment, the display module further includes a cover plate located on the side of the display panel away from the composite tape, the cover plate covering the holes, and a waterproof layer covering the surface of the cover plate corresponding to the holes.

[0015] Preferably, the display module further includes a polarizer located between the display panel and the cover plate;

[0016] Preferably, the display module further includes an optical adhesive layer located between the polarizer and the cover plate.

[0017] In one embodiment, the waterproof layer includes a convex lens located within the hole;

[0018] Preferably, the convex surface of the convex lens is away from the cover plate;

[0019] Preferably, the waterproof layer includes an optical adjustment material;

[0020] Preferably, the optical adjustment material includes optical adhesive;

[0021] Preferably, the hole includes a hole corresponding to the camera.

[0022] In one embodiment, the thickness of the waterproof layer covering the sidewall of the display panel enclosing the hole is greater than 0 and less than or equal to 0.35 nm.

[0023] Preferably, the thickness of the waterproof layer on the surface of the cover plate corresponding to the hole is greater than 0 and less than or equal to 0.35 nm.

[0024] In one embodiment, the composite tape further includes: a support layer located between the waterproof layer and the display panel, wherein the orthographic projection of the support layer onto the plane of the display panel overlaps with the orthographic projection of the waterproof layer onto the plane of the display panel.

[0025] Preferably, the orthographic projection of the support layer onto the plane of the display panel is within the orthographic projection range of the waterproof layer onto the plane of the display panel;

[0026] Preferably, the composite tape further includes: a buffer layer, which is located between the support layer and the waterproof layer, and the orthographic projection of the buffer layer on the plane where the display panel is located overlaps with the orthographic projection of the waterproof layer on the plane where the display panel is located;

[0027] Preferably, the orthographic projection of the buffer layer onto the plane of the display panel is within the orthographic projection range of the waterproof layer onto the plane of the display panel;

[0028] Preferably, the orthographic projection of the buffer layer onto the plane of the display panel is within the orthographic projection range of the support layer onto the plane of the display panel;

[0029] Preferably, the composite tape further includes a functional layer located on the side of the waterproof layer facing away from the display panel;

[0030] Preferably, the functional layer includes at least one of a metal layer and an impact-resistant layer;

[0031] Preferably, the functional layer includes a metal layer and an impact-resistant layer, with the metal layer located on the side of the impact-resistant layer opposite to the display panel;

[0032] Preferably, the composite tape further includes an adhesive layer located between the waterproof layer and the functional layer, for bonding the functional layer and the waterproof layer.

[0033] In one embodiment, the composite tape further includes: a support layer located between the waterproof layer and the display panel, wherein the orthographic projection of the support layer onto the plane of the display panel overlaps with the orthographic projection of the waterproof layer onto the plane of the display panel.

[0034] Preferably, the composite tape further includes: a buffer layer, which is disposed in the same layer as the waterproof layer, and the orthographic projection of the support layer on the plane where the display panel is located is within the orthographic projection range of the waterproof layer and the buffer layer on the plane where the display panel is located;

[0035] Preferably, in the direction perpendicular to the plane of the display panel, the thickness of the buffer layer is greater than the thickness of the waterproof layer;

[0036] Preferably, in a direction perpendicular to the plane of the display panel, the thickness of the waterproof layer inside the hole is less than the thickness of the waterproof layer outside the hole;

[0037] Preferably, the thickness of the waterproof layer outside the hole in the direction perpendicular to the plane of the display panel is greater than the width of the waterproof layer inside the hole in the direction parallel to the plane of the display panel.

[0038] Preferably, the composite tape further includes a functional layer located on the side of the buffer layer away from the display panel, wherein the orthographic projection of the functional layer on the plane of the display panel overlaps with the orthographic projection of the waterproof layer on the plane of the display panel.

[0039] A second aspect of this application provides a method for manufacturing a display module, the method comprising:

[0040] Provide composite tapes including a waterproof material layer;

[0041] A display panel is provided, and the display panel has holes;

[0042] Composite tape is applied to the non-display side of the display panel;

[0043] The waterproof material layer is heated and softened, extending from the non-display side into the hole to the side wall that covers the display panel and encloses the hole, forming a waterproof layer and thus obtaining the display module.

[0044] In one embodiment, the method of heating the waterproof material layer includes at least one of electric heating copper rod heating, positive pressure hot gas baking, and laser heating.

[0045] A third aspect of this application provides a display device, including the display module described above, or including a display module prepared by the preparation method described above.

[0046] According to the display module provided in the embodiments of this application, the waterproof layer of the composite tape extends into the hole of the display panel and covers the side wall of the hole enclosed by the display panel. This can effectively prevent external moisture from entering the display panel, ensuring the encapsulation effect of the display panel and thus effectively avoiding the black spot problem in the area where the hole of the display panel is located. Moreover, the waterproof layer hardly affects the optical performance of the hole, so that the display module has excellent display effect. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the structure of the display module in one embodiment of this application.

[0048] Figure 2 This is a schematic diagram of the display module structure in another embodiment of this application.

[0049] Figure 3 This is a schematic diagram of the display module structure in another embodiment of this application.

[0050] Figure 4 This is a schematic diagram of the display module structure in another embodiment of this application.

[0051] Figure 5 This is a schematic diagram of the display module structure in another embodiment of this application.

[0052] Figure 6 This is a schematic diagram of the display module structure in another embodiment of this application.

[0053] Figure 7 This is a schematic diagram of the display module structure in another embodiment of this application.

[0054] Figure 8 This is a schematic diagram of the display module structure in another embodiment of this application.

[0055] Figure 9 This is a schematic diagram of the display module structure in another embodiment of this application.

[0056] Figure 10 This is a schematic diagram of the manufacturing process of the display module in another embodiment of this application.

[0057] Figure 11 This is a schematic diagram of the structure of a display panel and a composite tape including a waterproof material layer bonded together in one embodiment of this application.

[0058] Figure 12 This is a schematic diagram of the structure of the display panel and the composite tape including the waterproof material layer being bonded together in another embodiment of this application. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0060] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods and means well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0061] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0062] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0063] The first aspect of this application provides a display module, as shown in the reference... Figure 1 The schematic diagram of the display module shown includes: a display panel 100 with a hole 110; and a composite tape 200, at least partially located on the non-display side of the display panel 100. The composite tape 200 includes a waterproof layer 210 that extends from the non-display side into the hole 110 to cover the sidewall of the display panel 100 that encloses the hole 110.

[0064] According to the display module provided in the embodiments of this application, the waterproof layer 210 of the composite tape 200 extends into the hole 110 of the display panel 100 and covers the sidewall of the hole 110 enclosed by the display panel 100. This can effectively prevent external moisture from entering the display panel 100, ensuring the encapsulation effect of the display panel 100, and thus effectively avoiding the black spot problem in the area where the hole 110 of the display panel 100 is located. Moreover, the waterproof layer 210 hardly affects the optical performance of the hole 110, so that the display module has excellent display effect.

[0065] In one embodiment, refer to Figure 2The schematic diagram of the display module shown includes a cover plate 300 located on the side of the display panel 100 opposite to the composite tape 200. The cover plate 300 covers the hole 110, and a waterproof layer 210 covers the surface of the cover plate 300 corresponding to the hole 110. Thus, the waterproof layer 210 on the sidewall of the hole 110 and the waterproof layer 210 covering the surface of the cover plate 300 corresponding to the hole 110 are integrally formed, resulting in better waterproofing and further reducing the risk of moisture intrusion into the display panel 100, as well as the risk of black spots appearing in the area where the hole 110 is located.

[0066] For example, cover plate 300 is located on the display side of display panel 100.

[0067] In one embodiment, the holes 110 in the display panel 100 include at least one of the following: holes corresponding to an infrared sensor, holes corresponding to a camera, and holes corresponding to a fingerprint sensor. For example, the holes corresponding to the infrared sensor, the camera, and the fingerprint sensor have different requirements for optical performance. For instance, the hole corresponding to the camera needs to have strong light transmittance, while the holes corresponding to the infrared sensor and the fingerprint sensor need to block light to achieve a matte display effect.

[0068] In one embodiment, the aperture 110 includes an aperture corresponding to an infrared sensor and / or an aperture corresponding to a fingerprint recognition sensor, and the waterproof layer 210 includes at least one of scattering particles, optical adjustment materials, pigments, and dyes. Thus, the scattering particles, optical adjustment materials, pigments, or dyes can effectively block light, facilitating a matte display effect in the areas where the apertures corresponding to the infrared sensor and / or the fingerprint recognition sensor are located.

[0069] In one embodiment, the scattering particles include silicone particles. Therefore, the silicone particles can effectively scatter light incident on the holes of the corresponding infrared sensor and / or the fingerprint sensor, reducing the intensity of light emanating from the holes and achieving a better matte display effect for the display module.

[0070] In one embodiment, the optical adjustment material includes an optical adhesive, optionally including a black light-shielding adhesive. Therefore, the aforementioned optical adjustment material can effectively adjust the light incident on the holes of the corresponding infrared sensor and / or the fingerprint sensor, reducing the intensity of the light emitted from the holes and achieving a better matte display effect for the display module.

[0071] In one embodiment, the pigment includes a pigment that reduces visible light transmittance and / or the dye includes a dye that reduces visible light transmittance. Therefore, after the pigment or dye is added to the waterproof layer, the color of the light emitted from the hole is the same as the color of the pigment or dye, which helps to reduce the intensity of the light emitted from the hole and achieves a better matte display effect for the display module. For example, the color of the dye or pigment can be red, which can reduce the transmittance of visible light in the holes corresponding to the infrared sensor and / or the fingerprint sensor, while allowing infrared light to pass through normally, reducing the need for ink printing on the cover surface.

[0072] In one embodiment, the waterproof layer 210 includes hot melt adhesive. After the hot melt adhesive is heated and softened, it is advantageous to extend from the non-display side hole of the display panel and to cover the sidewall of the hole 110. It is almost unaffected by the shape of the hole 110, has a high degree of adhesion to the sidewall of the hole 110, and has excellent waterproof effect after curing, significantly reducing the probability of black spots appearing on the display panel 100 in the area where the hole 110 is located.

[0073] In one embodiment, the hot melt adhesive includes at least one of ethylene-vinyl acetate copolymer (EVA), polyolefin copolymer (PO), polyurethane (PUR), polyamide (PA), and polyethersulfone (PES). Therefore, the above material is easily softened by heat, easily shaped, and exhibits excellent waterproof performance after curing.

[0074] In one embodiment, the hole 110 includes a hole corresponding to a camera, as shown in the figure. Figure 3 The schematic diagram of the display module shown illustrates that the waterproof layer 210 includes a convex lens 211, which is located within the hole 110. Therefore, the convex lens 211 has excellent light-gathering effect, enabling it to provide supplementary lighting and improve the image quality of the display module, resulting in clearer images or videos.

[0075] It is understood that the waterproof layer 210 extends from the non-display side hole 110 of the display panel 100, covers the sidewall of the hole 110, and covers the surface of the cover plate 300 corresponding to the hole 110. Exemplarily, the waterproof layer 210 covering the surface of the cover plate 300 corresponding to the hole 110 is a convex lens. Exemplarily, the heated and softened hot melt adhesive extends from the non-display side hole 110 of the display panel 100, covers the sidewall of the hole 110, and the shape of the hot melt adhesive covering the surface of the cover plate 300 corresponding to the hole 110 is formed into a convex lens.

[0076] In one embodiment, refer to Figure 3 The convex surface of the convex lens 211 is 300 degrees away from the cover plate. As a result, the convex lens 211 has excellent light-gathering effect, which is beneficial to improving the imaging effect of the display module, such as obtaining clearer pictures or videos.

[0077] In one embodiment, the thickness of the waterproof layer 210 covering the sidewall of the display panel 100 enclosing the aperture 110 is greater than 0 and less than or equal to 0.35 nm, for example, it can be 0.01 nm, 0.05 nm, 0.1 nm, 0.15 nm, 0.2 nm, 0.25 nm, 0.3 nm, or 0.35 nm. It should be noted that the thickness of the waterproof layer 210 covering the sidewall of the display panel 100 enclosing the aperture 110 refers to the thickness of the waterproof layer 210 covering the sidewall of the display panel 100 enclosing the aperture 110 along a direction parallel to the plane of the display panel 100. Therefore, the thickness of the waterproof layer 210 covering the sidewall of the display panel 100 enclosing the aperture 110 is appropriate, resulting in excellent waterproofing performance and minimal impact on the optical performance of the aperture 110.

[0078] In one embodiment, the thickness of the waterproof layer 210 covering the surface of the cover plate 300 corresponding to the hole 110 is greater than 0 and less than or equal to 0.35 nm. It should be noted that the thickness of the waterproof layer 210 covering the surface of the cover plate 300 corresponding to the hole 110 refers to the thickness of the waterproof layer 210 covering the surface of the cover plate 300 corresponding to the hole 110 in a direction perpendicular to the plane of the display panel 100. Therefore, the thickness of the waterproof layer 210 covering the surface of the cover plate 300 corresponding to the hole 110 is appropriate, resulting in excellent waterproof performance and minimal impact on the optical performance of the hole 110. It is understood that the thickness of the waterproof layer 210 covering the surface of the cover plate 300 corresponding to the hole 110 can be adjusted to meet different camera requirements, or the light emission performance requirements of different holes corresponding to infrared sensors and / or fingerprint recognition sensors.

[0079] In one embodiment, the hole 110 includes a hole corresponding to the camera, and the waterproof layer 210 includes pigment or dye, thereby the waterproof layer 210 has a filter effect, reducing the printing of ink on the surface of the cover plate 300 and further improving the camera effect of the display module.

[0080] In one embodiment, refer to Figure 4 The schematic diagram of the display module shown illustrates that the composite tape 200 further includes a support layer 220 located between the waterproof layer 210 and the display panel 100. The orthographic projection of the support layer 220 onto the plane of the display panel 100 overlaps with the orthographic projection of the waterproof layer 210 onto the plane of the display panel 100. Therefore, the support layer 220 can support the waterproof layer 210, improving the manufacturing yield of the waterproof layer 210. It is understood that, compared to the holes corresponding to the camera, the holes corresponding to the infrared sensor and / or the fingerprint sensor are smaller. The holes corresponding to the infrared sensor and / or the fingerprint sensor can adopt the structural design of the buffer layer 230 and the waterproof layer 210 of this embodiment. Therefore, the placement positions of the waterproof layer 210 and the buffer layer 230 can be adjusted according to different usage requirements.

[0081] Optionally, the orthographic projection of the support layer 220 onto the plane where the display panel 100 is located is within the orthographic projection range of the waterproof layer 210 onto the plane where the display panel 100 is located. In this case, the support layer 220 is a whole film layer.

[0082] For example, the support layer 220 is a backing protection film (BPF). The material of the support layer 220 is a conventional material, which will not be described in detail here.

[0083] For example, the orthographic projection of the support layer 220 onto the plane where the display panel 100 is located coincides with the orthographic projection of the display panel 100 onto the plane where the display panel 100 is located.

[0084] In one embodiment, the waterproof layer includes an optical adjustment material; optionally, the optical adjustment material includes an optical adhesive. Therefore, including the optical adjustment material in the waterproof layer corresponding to the aperture of the corresponding camera facilitates meeting the light requirements of the aperture.

[0085] It is understood that the support layer 220 is provided with through holes corresponding to the hole 110. The orthographic projection of the through holes in the support layer 220 onto the waterproof layer 210 covers the orthographic projection of the hole 110 onto the waterproof layer 210.

[0086] In one embodiment, refer to Figure 5 The schematic diagram of the display module shown illustrates that the composite tape 200 further includes a buffer layer 230, located between the support layer 220 and the waterproof layer 210. The orthographic projection of the buffer layer onto the plane of the display panel 100 overlaps with the orthographic projection of the waterproof layer 210 onto the plane of the display panel 100. Therefore, when the display module is impacted, the buffer layer 230 can provide cushioning to reduce damage to the display panel 100. Simultaneously, when the waterproof layer 210 is manufactured using a heating method, it can effectively insulate against heat, reducing damage to the display panel 100 caused by high temperatures.

[0087] Optionally, the orthographic projection of the buffer layer 230 onto the plane of the display panel 100 is located within the orthographic projection range of the waterproof layer 210 onto the plane of the display panel 100.

[0088] Optionally, the orthographic projection of the buffer layer 230 onto the plane of the display panel 100 is located within the orthographic projection range of the support layer 220 onto the plane of the display panel 100.

[0089] For example, the cushioning layer 230 has adhesive on opposite sides for bonding the cushioning layer 230 to the waterproof layer 210 and the support layer 220. For example, the adhesive can be double-sided tape (DST).

[0090] It is understood that the buffer layer 230 is provided with through holes corresponding to the hole 110. The orthographic projection of the through holes in the buffer layer 230 onto the waterproof layer 210 covers the orthographic projection of the hole 110 onto the waterproof layer 210.

[0091] In one embodiment, refer to Figure 6 The schematic diagram of the display module shown shows that the composite tape 200 also includes a functional layer 240, which is located on the side of the waterproof layer 210 away from the display panel 100.

[0092] It is understood that the functional layer 240 is provided with through holes corresponding to the hole 110. The orthographic projection of the through holes in the functional layer 240 onto the waterproof layer 210 covers the orthographic projection of the hole 110 onto the waterproof layer 210.

[0093] In one embodiment, the functional layer includes at least one of a metal layer and an impact-resistant layer. In a preferred embodiment, the functional layer includes a metal layer and an impact-resistant layer, with the metal layer located on the side of the impact-resistant layer facing away from the display panel. Thus, the metal layer can discharge static electricity from the display panel to reduce the impact of static electricity on the display panel; the impact-resistant layer can enhance the impact resistance of the display module.

[0094] In one embodiment, the metal layer comprises at least one of copper foil, aluminum foil, and stainless steel (SUS); the impact-resistant layer comprises silicone gel and / or polyethylene terephthalate (PET).

[0095] Optionally, the composite tape further includes an adhesive layer 250, located between the waterproof layer 210 and the functional layer 240, for bonding the waterproof layer 210 and the functional layer 240. For example, the adhesive layer 250 includes double-sided adhesive (DST).

[0096] In one embodiment, refer to Figure 7 The schematic diagram of the display module shown illustrates that the composite tape 200 also includes a support layer 220 located between the waterproof layer 210 and the display panel 100. The orthographic projection of the support layer 220 onto the plane of the display panel 100 overlaps with the orthographic projection of the waterproof layer 210 onto the plane of the display panel 100. Therefore, the support layer 220 can support the waterproof layer 210, improving the manufacturing yield of the waterproof layer 210.

[0097] In one embodiment, refer to Figure 7The composite tape 200 also includes a buffer layer 230, which is disposed in the same layer as the waterproof layer 210. The orthographic projection of the support layer 220 onto the plane where the display panel 100 is located is within the orthographic projection range of the waterproof layer 210 and the buffer layer 230 onto the plane where the display panel 100 is located. Therefore, when the display module is impacted, the buffer layer 230 can provide cushioning to reduce damage to the display panel 100. It is understood that the aperture corresponding to the camera is relatively large, and the structure design of the buffer layer 230 and the waterproof layer 210 in this embodiment can be adopted for the aperture. Therefore, the placement positions of the waterproof layer 210 and the buffer layer 230 can be adjusted according to different usage requirements. In this embodiment, the waterproof layer 210 is a non-full-film layer.

[0098] For example, the orthographic projection of the buffer layer 230 on the display panel 100 is in contact with the orthographic projection of the waterproof layer 210 on the display panel 100.

[0099] Optionally, in the direction perpendicular to the plane of the display panel 100, the thickness of the buffer layer 230 is greater than the thickness of the waterproof layer 210. Optionally, in the direction perpendicular to the plane of the display panel 100, the thickness of the waterproof layer 210 located inside the hole 110 is less than the thickness of the waterproof layer 210 located outside the hole 110. Optionally, in the direction perpendicular to the plane of the display panel 100, the thickness of the waterproof layer 210 located outside the hole 110 is greater than the width of the waterproof layer 210 located inside the hole 110 in the direction parallel to the plane of the display panel 100. This facilitates the manufacture of the waterproof layer 210, and the size of the waterproof layer 210 inside the hole 110 is appropriate. It is understandable that the waterproof layer 210 is formed by heating and softening hot melt adhesive. The thickness of the hot melt adhesive can be equal to or greater than the thickness of the buffer layer 230. After the hot melt adhesive is extended from the non-display side hole 110 of the display panel 100 to the side wall of the cover hole 110, the thickness of the waterproof layer 210 formed is less than the thickness of the buffer layer 230.

[0100] In one embodiment, refer to Figure 7 The composite tape 200 also includes a functional layer 240 located on the side of the buffer layer 230 facing away from the display panel 100. The orthographic projection of the functional layer 240 onto the plane of the display panel 100 overlaps with the orthographic projection of the waterproof layer 210 onto the plane of the display panel 100. At this time, the orthographic projection of the hole 110 onto the plane of the display panel 100 is within the range of the orthographic projection of the waterproof layer 210 onto the plane of the display panel 100, and the waterproof layer 210 has excellent waterproofing effect.

[0101] In one embodiment, the functional layer includes at least one of a metal layer and an impact-resistant layer. In a preferred embodiment, the functional layer includes a metal layer and an impact-resistant layer, with the metal layer located on the side of the impact-resistant layer facing away from the display panel. Thus, the metal layer can discharge static electricity from the display panel to reduce the impact of static electricity on the display panel; the impact-resistant layer can enhance the impact resistance of the display module.

[0102] In one embodiment, the metal layer comprises at least one of copper foil, aluminum foil, and stainless steel; the impact-resistant layer comprises silicone gel and / or polyethylene terephthalate (PET).

[0103] In one embodiment, refer to Figure 8 The schematic diagram of the display module shown includes a polarizer 400 located between the display panel 100 and the cover plate 300. The polarizer 400 reduces the reflectivity of the display module and improves its display quality.

[0104] In one embodiment, refer to Figure 9 The schematic diagram of the display module shown includes an optical adhesive layer 500 located between the polarizer 400 and the cover plate 300. Therefore, the optical adhesive layer 500 effectively protects the polarizer 400 and also provides planarization, improving the display module's impact resistance and display effect.

[0105] A second aspect of this application provides a method for manufacturing a display module, referring to... Figure 10 The schematic diagram of the preparation method shown illustrates that the module preparation method includes the following steps.

[0106] S100: Provides composite tapes including a waterproof material layer.

[0107] It should be noted that the waterproof material layer includes hot melt adhesive, and the hot melt adhesive is the same as described above, so it will not be elaborated on further here.

[0108] In one embodiment, refer to Figure 11 and Figure 12 The diagram shows a display panel and a composite tape including a waterproof material layer bonded together. The waterproof material layer consists of 21 hot melt adhesives. Before being heated and softened, the hot melt adhesive is a relatively flat film layer, which is easy to prepare and is directly bonded to the non-display side of the display panel along with the composite tape.

[0109] In existing technologies, to achieve waterproofing in the area where the display panel has holes, adhesive is directly applied inside the holes, filling them completely and affecting the optical performance within the holes. However, in this embodiment, hot melt adhesive is first formed in a composite tape, and then heated to extend into the holes of the display panel, covering the sidewalls surrounding the holes. This method is simple, easy to implement, and allows for control over the thickness of the hot melt adhesive covering the sidewalls of the holes, with virtually no impact on the optical performance within the holes.

[0110] It should be noted that the composite tape is consistent with the previous description, and the waterproof material layer is an intermediate state of the waterproof layer, and the waterproof material layer is made of the same material as the waterproof layer.

[0111] S200: Provides a display panel with holes.

[0112] It should be noted that the display panel is the same as described above, so we will not go into further detail here.

[0113] In one embodiment, the holes in the display panel include at least one of the following: holes corresponding to an infrared sensor, holes corresponding to a camera, and holes corresponding to a fingerprint sensor. The optical performance requirements for the holes corresponding to the infrared sensor, the camera, and the fingerprint sensor differ. For example, the hole corresponding to the camera needs high light transmittance, while the hole corresponding to the infrared sensor and / or the fingerprint sensor needs to block light to achieve a matte display effect.

[0114] It should be noted that the method of setting the waterproof layer inside the hole is the same as described above, and will not be repeated here.

[0115] S300: Composite tape is applied to the non-display side of the display panel.

[0116] In one embodiment, the method of attaching composite tape to the non-display side of the display panel is a prior art, including but not limited to using adhesive to attach the display panel and composite tape together, which will not be described in detail here.

[0117] S400: The waterproof material layer is heated and softened, extending from the non-display side into the hole to the side wall that covers the display panel and encloses the hole, forming a waterproof layer and thus obtaining the display module.

[0118] It should be noted that the waterproof layer is the same as described above, so it will not be repeated here.

[0119] In one embodiment, the method of heating the waterproof material layer includes at least one of heating with an electric heating copper rod, baking with positive pressure hot gas, and laser heating. Therefore, the method of heating the waterproof material layer is simple, easy to implement, and can yield a waterproof layer with excellent performance.

[0120] For example, the hole corresponds to the hole set in the camera, and the waterproof layer covering the cover plate surface inside the hole is a convex lens. When the waterproof material layer is heated by heating with an electric heating copper rod, the shape of the electric heating copper rod can correspond to the structure of the waterproof layer, so that the waterproof layer covers the side wall of the hole enclosing the display panel and the waterproof layer covering the cover plate surface inside the hole is a convex lens. When the waterproof material layer is heated by baking with positive pressure hot air, the airflow can be adjusted so that the waterproof layer covers the side wall of the hole enclosing the display panel and the waterproof layer covering the cover plate surface inside the hole is a convex lens. When the waterproof material layer is heated by laser heating, the laser spot can be adjusted so that the waterproof layer covers the side wall of the hole enclosing the display panel and the waterproof layer covering the cover plate surface inside the hole is a convex lens. It can be understood that the shape of the electric heating copper rod, the airflow of positive pressure hot air, or the laser spot can be adjusted according to actual needs to obtain a waterproof layer of the desired shape.

[0121] In one embodiment, the hole is a hole corresponding to an infrared sensor and / or a fingerprint recognition sensor. At least one of the following can be incorporated into the waterproof material layer of the composite tape: scattering particles, optical adjustment materials, pigments, and dyes. Exemplarily, at least one of the following can be dispersed in hot melt adhesive to form a waterproof material layer. This waterproof material layer containing at least one of the following can then be heated by an electric heating copper rod, baked with positive pressure hot gas, or heated by a laser to obtain a waterproof layer of the desired shape.

[0122] In one specific embodiment, the hole is a hole corresponding to the camera, and the method for manufacturing the display module includes the following steps:

[0123] 1. To manufacture composite tape, the composite tape includes a support layer, a waterproof material layer, a cushioning layer and a functional layer stacked in sequence.

[0124] 2. Provide a display panel with holes for the corresponding camera settings.

[0125] 3. Apply the composite tape to the non-display side of the display panel. Specifically, apply the surface of the support layer that faces away from the waterproof material layer to the non-display side of the display panel.

[0126] 4. Use a heating copper rod to heat the waterproof material layer, causing the waterproof material layer to soften and extend into the holes of the display panel, until it covers the side wall of the display panel surrounding the holes and the surface of the cover plate corresponding to the holes.

[0127] 5. The waterproof layer is obtained after the waterproof material layer has cured.

[0128] In one specific embodiment, the hole is a hole corresponding to the infrared sensor and / or a hole corresponding to the fingerprint recognition sensor, and the method for manufacturing the display module includes the following steps:

[0129] 1. To manufacture a composite tape, the composite tape includes a support layer, a buffer layer and a functional layer stacked in sequence, with a waterproof material layer and the buffer layer set in the same layer; wherein, the waterproof material layer is prepared by dispersing scattering particles in hot melt adhesive, and then attaching the cured material to one side of the support layer, so that the waterproof material layer and the buffer layer are set in the same layer.

[0130] 2. Provide a display panel, in which holes corresponding to the infrared sensor settings and / or fingerprint recognition sensor settings are provided.

[0131] 3. Apply the composite tape to the non-display side of the display panel. Specifically, apply the surface of the support layer that faces away from the waterproof material layer to the non-display side of the display panel.

[0132] 4. Use a heating copper rod to heat the waterproof material layer, causing the waterproof material layer to soften and extend into the holes of the display panel, until it covers the side wall of the display panel surrounding the holes and the surface of the cover plate corresponding to the holes.

[0133] 5. The waterproof layer is obtained after the waterproof material layer has cured.

[0134] A third aspect of this application provides a display device, including the display module described above, or including a display module prepared by the preparation method described above.

[0135] It should be noted that the display module is the same as described above, and will not be repeated here.

[0136] It should be noted that, in addition to the display module mentioned above, the display device may also include the structures that a conventional display device should have, such as the casing and the chip, which will not be elaborated on further here.

[0137] It should be noted that the display device in this application embodiment can achieve a matte display effect at the hole corresponding to the infrared sensor, and / or can achieve a fill light effect at the hole corresponding to the camera, resulting in excellent image quality.

[0138] For example, the display device may be an organic light-emitting semiconductor (OLED) display device or a liquid crystal display (LCD) display device, etc.

[0139] For example, the display device can be used to display static images or dynamic images. The display device can be used for color display or for black and white display.

[0140] For example, the display device can be a flexible display device, such as a tablet, mobile phone, wearable device, etc.

[0141] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0142] The above description has been given for illustrative and descriptive purposes. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A display module, characterized in that, include: The display panel has holes. A composite tape, at least partially located on the non-display side of the display panel, includes a waterproof layer and a support layer. The waterproof layer extends from the non-display side into the hole to cover the sidewall of the display panel that encloses the hole. The support layer is located between the waterproof layer and the display panel, and the orthographic projection of the support layer onto the plane of the display panel overlaps with the orthographic projection of the waterproof layer onto the plane of the display panel. A cover plate is located on the side of the display panel opposite to the composite tape, the cover plate covers the hole, and the waterproof layer covers the surface of the cover plate corresponding to the hole; The waterproof layer covering the surface of the cover plate corresponding to the hole is a convex lens; The method for preparing the waterproof layer includes: The waterproof material layer is heated and softened, extending from the non-display side into the hole to cover the sidewall of the display panel that encloses the hole, forming a waterproof layer that covers the surface of the cover plate corresponding to the hole. The shape of the waterproof layer covering the surface of the cover plate corresponding to the hole is made into a convex lens. The waterproof material layer includes hot melt adhesive. Before being heated and softened, the waterproof material layer is a flat film layer that is directly adhered to the non-display side of the display panel along with the composite tape.

2. The display module according to claim 1, characterized in that, The waterproof material layer also includes at least one of scattering particles, optical adjustment materials, pigments, and dyes; The scattering particles include silicone particles; and / or, the optical adjustment material includes optical adhesive; and / or, the optical adhesive includes black light-blocking adhesive.

3. The display module according to claim 1 or 2, characterized in that, The hot melt adhesive includes at least one of ethylene-vinyl acetate copolymer, polyolefin copolymer, polyurethane, polyamide, and polyethersulfone.

4. The display module according to claim 1 or 2, characterized in that, The hole includes at least one of the following: a hole corresponding to an infrared sensor, a hole corresponding to a camera, and a hole corresponding to a fingerprint recognition sensor.

5. The display module according to claim 1, characterized in that, The display module also includes a polarizer located between the display panel and the cover plate; The display module further includes an optical adhesive layer located between the polarizer and the cover plate.

6. The display module according to claim 1, characterized in that, The convex surface of the convex lens is away from the cover plate.

7. The display module according to claim 1, characterized in that, The thickness of the waterproof layer covering the sidewall of the display panel that encloses the hole is greater than 0 and less than or equal to 0.35 nm; And / or, the thickness of the waterproof layer covering the surface of the cover plate corresponding to the hole is greater than 0 and less than or equal to 0.35 nm.

8. The display module according to claim 1, characterized in that, The orthographic projection of the support layer onto the plane where the display panel is located falls within the orthographic projection range of the waterproof layer onto the plane where the display panel is located.

9. The display module according to claim 8, characterized in that, The composite tape further includes a buffer layer, which is located between the support layer and the waterproof layer, and the orthographic projection of the buffer layer on the plane where the display panel is located overlaps with the orthographic projection of the waterproof layer on the plane where the display panel is located.

10. The display module according to claim 9, characterized in that, The orthographic projection of the buffer layer onto the plane where the display panel is located is within the orthographic projection range of the waterproof layer onto the plane where the display panel is located; And / or, the orthographic projection of the buffer layer onto the plane where the display panel is located is within the orthographic projection range of the support layer onto the plane where the display panel is located.

11. The display module according to claim 8, characterized in that, The composite tape further includes a functional layer located on the side of the waterproof layer opposite to the display panel.

12. The display module according to claim 11, characterized in that, The functional layer includes at least one of a metal layer and an impact-resistant layer.

13. The display module according to claim 11, characterized in that, The functional layer includes a metal layer and an impact-resistant layer, with the metal layer located on the side of the impact-resistant layer opposite to the display panel.

14. The display module according to claim 11, characterized in that, The composite tape further includes an adhesive layer located between the waterproof layer and the functional layer, for bonding the functional layer and the waterproof layer.

15. The display module according to claim 1, characterized in that, The composite tape further includes a buffer layer, which is disposed in the same layer as the waterproof layer, and the orthographic projection of the support layer on the plane where the display panel is located is within the orthographic projection range of the waterproof layer and the buffer layer on the plane where the display panel is located.

16. The display module according to claim 15, characterized in that, In a direction perpendicular to the plane of the display panel, the thickness of the buffer layer is greater than the thickness of the waterproof layer; And / or, in a direction perpendicular to the plane of the display panel, the thickness of the waterproof layer inside the hole is less than the thickness of the waterproof layer outside the hole; And / or, the thickness of the waterproof layer located outside the hole in a direction perpendicular to the plane of the display panel is greater than the width of the waterproof layer located inside the hole in a direction parallel to the plane of the display panel.

17. The display module according to claim 15, characterized in that, The composite tape further includes a functional layer located on the side of the buffer layer away from the display panel, wherein the orthographic projection of the functional layer on the plane of the display panel overlaps with the orthographic projection of the waterproof layer on the plane of the display panel.

18. A method for manufacturing a display module, characterized in that, include: Provide composite tapes that include a waterproof material layer and a support layer; A display panel is provided, wherein the display panel has holes; The composite tape is attached to the non-display side of the display panel; The waterproof material layer is heated and softened, extending from the non-display side into the hole to cover the sidewall of the display panel that surrounds the hole, forming a waterproof layer, thus obtaining the display module; The support layer is located between the waterproof layer and the display panel, and the orthographic projection of the support layer on the plane of the display panel overlaps with the orthographic projection of the waterproof layer on the plane of the display panel. The waterproof material layer includes hot melt adhesive, and the waterproof material layer is a flat film layer before it is heated and softened, and is directly attached to the non-display side of the display panel along with the composite tape. The display module further includes a cover plate located on the side of the display panel away from the composite tape, the cover plate covering the hole, and the waterproof layer covering the surface of the cover plate corresponding to the hole; The softened waterproof material layer also covers the surface of the cover plate corresponding to the hole, and the shape of the waterproof layer covering the surface of the cover plate corresponding to the hole is made into a convex lens.

19. The preparation method according to claim 18, characterized in that, The method of heating the waterproof material layer includes at least one of electric heating copper rod heating, positive pressure hot gas baking, and laser heating.

20. A display device, characterized in that, Includes the display module according to any one of claims 1 to 17, or includes the display module prepared by the preparation method according to claim 18 or 19.

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