Display module, preparation method thereof and display device

Abstract

The invention provides a display module, a preparation method thereof and a display device. The display module comprises a display panel provided with a hole; at least part of the composite adhesive tape is located on the non-display side of the display panel, the composite adhesive tape comprises a waterproof layer, and the waterproof layer extends from the non-display side to the interior of the hole to cover the side wall of the hole defined by the display panel. The waterproof layer of the composite adhesive tape extends into the hole of the display panel and covers the side wall of the hole defined by the display panel, external water vapor can be effectively prevented from invading the display panel, the packaging effect of the display panel is guaranteed, and then the problem of black spots in the area where the hole of the display panel is located is effectively solved; and the waterproof layer hardly affects the optical performance of the holes, so that the display module has an excellent display effect.

Description

Technical Field

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

[0002] Current display devices, such as mobile phones, tablets, or wearable terminals, have an increasing demand for flexible screens. When designing the front camera of a display device, an under-screen camera hole design is used. The under-screen camera hole design will laser-drill holes in the flexible screen to meet the optical requirements of the camera module. However, after the flexible screen is laser-drilled, water vapor will enter the screen film layer through the edge of the hole during use, causing packaging failure and black spot problems. Summary of the invention

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

[0004] In a first aspect, the present application provides a display module, comprising:

[0005] A display panel, wherein the display panel is provided with a hole;

[0006] The composite tape is at least partially located on the non-display side of the display panel. The composite tape comprises a waterproof layer, which extends from the non-display side into the hole to cover the side wall of the display panel enclosing the hole.

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

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

[0009] Preferably, the optical adjustment material comprises optical glue;

[0010] Preferably, the optical glue comprises black light-shielding glue;

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

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

[0013] Preferably, the hole includes at least one of 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, the cover plate is located on a side of the display panel away from the composite tape, the cover plate covers the hole, and the waterproof layer covers the surface of the cover plate corresponding to the hole;

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

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

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

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

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

[0020] Preferably, the optical adjustment material includes an 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 side wall of the hole surrounded by the display panel is greater than 0 and less than or equal to 0.35 nm;

[0023] Preferably, 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.

[0024] In one embodiment, the composite tape further includes: a support layer, which is located between the waterproof layer and the display panel, and the orthographic projection of the support 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;

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

[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 on the plane where the display panel is located is within the range of the orthographic projection of the waterproof layer on the plane where the display panel is located;

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

[0029] Preferably, the composite tape further includes: a functional layer, which is 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, and the metal layer is located on the side of the impact-resistant layer facing away from 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, and the orthographic projection of the support 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;

[0034] Preferably, the composite tape further includes: a buffer layer, arranged on 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 range of the orthographic projections 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 where the display panel is located, the thickness of the buffer layer is greater than the thickness of the waterproof layer;

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

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

[0038] Preferably, the composite tape further includes: a functional layer, located on the side of the buffer layer facing away from the display panel, and the orthographic projection of the functional 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.

[0039] The second aspect of the present application provides a method for manufacturing a display module, and the manufacturing method includes:

[0040] Providing a composite tape including a waterproof material layer;

[0041] Providing a display panel, with a hole formed in the display panel;

[0042] Bonding the composite tape to the non-display side of the display panel;

[0043] Heating the waterproof material layer, and the softened waterproof material layer extends from the non-display side into the hole to cover the side wall of the hole surrounded by the display panel, forming a waterproof layer, thereby obtaining a display module.

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

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

[0046] According to the display module provided by the embodiment of the present application, the waterproof layer of the composite tape extends into the holes of the display panel and covers the side walls of the holes surrounded by the display panel, which can effectively prevent external water vapor from invading the display panel, ensure the encapsulation effect of the display panel, and further effectively avoid the black spot problem in the area where the holes of the display panel are located; moreover, the waterproof layer hardly affects the optical performance of the holes, making the display module have excellent display effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a schematic structural diagram of a display module in an embodiment of the present application.

[0048] Figure 2 It is a schematic structural diagram of a display module in another embodiment of the present application.

[0049] Figure 3 It is a schematic structural diagram of a display module in another embodiment of the present application.

[0050] Figure 4 It is a schematic structural diagram of a display module in another embodiment of the present application.

[0051] Figure 5 It is a schematic structural diagram of a display module in another embodiment of the present application.

[0052] Figure 6 It is a schematic structural diagram of a display module in another embodiment of the present application.

[0053] Figure 7 It is a schematic structural diagram of a display module in another embodiment of the present application.

[0054] Figure 8 It is a schematic structural diagram of a display module in another embodiment of the present application.

[0055] Figure 9 It is a schematic structural diagram of a display module in another embodiment of the present application.

[0056] Figure 10 It is a schematic flow chart of the preparation method of a display module in another embodiment of the present application.

[0057] Figure 11 It is a schematic structural diagram of the bonding of a display panel and a composite tape including a waterproof material layer in an embodiment of the present application.

[0058] Figure 12 It is a schematic structural diagram of the bonding of a display panel and a composite tape including a waterproof material layer in another embodiment of the present application. Detailed implementation manners

[0059] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0060] In addition, for better illustration of the present application, numerous specific details are given in the following detailed implementation manners. Those skilled in the art should understand that the present application can be implemented without some specific details. In some instances, methods and means well known to those skilled in the art are not described in detail so as to highlight the gist of the present application.

[0061] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0062] In addition, terms such as "first" and "second" are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0063] In the first aspect of the present application, a display module is provided. Referring to Figure 1 the structural schematic diagram of the display module shown, the display module includes: a display panel 100, and the display panel 100 is provided with a hole 110; a composite tape 200, at least part of which is located on the non-display side of the display panel 100. The composite tape 200 includes a waterproof layer 210, and the waterproof layer 210 extends from the non-display side into the hole 110 to cover the side wall of the hole 110 surrounded by the display panel 100.

[0064] According to the display module provided by the embodiment of the present application, the waterproof layer 210 of the composite tape 200 extends into the hole 110 of the display panel 100 and covers the side wall of the hole 110 surrounded by the display panel 100, which can effectively prevent external water vapor from invading the display panel 100, ensure the encapsulation effect of the display panel 100, and further effectively avoid 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, referring to Figure 2The structural diagram of the display module shown in FIG. 1 further includes a cover plate 300, which is located on the side of the display panel 100 away from the composite tape 200, and the cover plate 300 covers the hole 110, and the waterproof layer 210 covers the surface of the cover plate 300 corresponding to the hole 110. Thus, the waterproof layer 210 on the side wall 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, and the waterproof layer 210 has a better waterproof effect, further reducing the risk of water vapor intrusion into the display panel 100, and reducing the risk of black spots appearing in the area where the hole 110 is located.

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

[0067] In one embodiment, the hole 110 in the display panel 100 includes at least one of a hole corresponding to an infrared sensor, a hole corresponding to a camera, and a hole corresponding to a fingerprint recognition sensor. For example, the hole corresponding to the infrared sensor, the hole corresponding to the camera, and the hole corresponding to the fingerprint recognition sensor have different requirements for optical performance. For example, the hole corresponding to the camera requires a strong light transmittance, while the hole corresponding to the infrared sensor and the hole corresponding to the fingerprint recognition sensor need to shield the light to achieve a matte display effect.

[0068] In one embodiment, the hole 110 includes a hole corresponding to the infrared sensor and / or a hole corresponding to the 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 shield the light, which is conducive to achieving a matte display effect in the area where the hole corresponding to the infrared sensor and / or the hole corresponding to the fingerprint recognition sensor is located.

[0069] In one embodiment, the scattering particles include silica particles. Thus, the silica particles can effectively scatter the light incident into the hole corresponding to the infrared sensor and / or the hole corresponding to the fingerprint recognition sensor, reduce the intensity of the light emitted from the hole, and achieve a better matte display effect of the display module.

[0070] In one embodiment, the optical adjustment material includes optical glue, and optionally, the optical glue includes black light-shielding glue. Thus, the optical adjustment material can effectively adjust the light incident on the hole corresponding to the infrared sensor and / or the hole corresponding to the fingerprint recognition sensor, reduce the intensity of the light emitted from the hole, and achieve a better effect of the matte display of the display module.

[0071] In one embodiment, the pigment includes a pigment that reduces visible light transmission and / or the dye includes a dye that reduces visible light transmission. Thus, after the above-mentioned 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 achieve a better matte display effect of the display module. Exemplarily, the color of the dye or pigment can be red, which can reduce the transmission of visible light in the holes corresponding to the infrared sensor and / or the fingerprint recognition sensor. The infrared light can pass through normally, reducing the ink printing on the cover plate surface.

[0072] In one embodiment, the waterproof layer 210 includes hot melt adhesive. After the hot melt adhesive is heated and softened, it is beneficial to extend from the non-display side of the display panel to the hole and cover the side wall of the hole 110. It is hardly affected by the shape of the hole 110 and has a high degree of fitting with the side wall of the hole 110. After curing, the waterproof effect is excellent, significantly reducing the probability of black spots appearing in the area of the display panel 100 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). Thus, the above materials are easy to heat and soften, easy to shape, and have excellent waterproof effect after curing.

[0074] In one embodiment, the hole 110 includes a hole corresponding to the camera. Referring to Figure 3 the structural schematic diagram of the display module shown, the waterproof layer 210 includes a convex lens 211, and the convex lens 211 is located in the hole 110. Thus, the convex lens 211 has excellent light condensing effect, can realize the function of supplementary light, and is beneficial to improving the camera effect of the display module, such as the obtained pictures or videos being clearer, etc.

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

[0076] In one embodiment, referring to Figure 3 , the convex surface of the convex lens 211 faces away from the cover plate 300. Thus, the convex lens 211 has excellent light condensing effect, which is beneficial to improving the camera effect of the display module, such as the obtained pictures or videos being clearer, etc.

[0077] In one embodiment, the thickness of the waterproof layer 210 covering the sidewall of the hole 110 surrounded by the display panel 100 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, etc. It should be noted that the thickness of the waterproof layer 210 covering the sidewall of the hole 110 surrounded by the display panel 100 refers to the thickness of the waterproof layer 210 covering the sidewall of the hole 110 surrounded by the display panel 100 in the direction parallel to the plane where the display panel 100 is located. Thus, the thickness of the waterproof layer 210 covering the sidewall of the hole 110 surrounded by the display panel 100 is appropriate, the waterproof effect is excellent, and it hardly affects the optical performance of the hole 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 the direction perpendicular to the plane where the display panel 100 is located. Thus, the thickness of the waterproof layer 210 covering the surface of the cover plate 300 corresponding to the hole 110 is appropriate, the waterproof effect is excellent, and it hardly affects the optical performance of the hole 110. It can be understood that different camera requirements, or the light output performance requirements of the holes corresponding to different infrared sensors and / or fingerprint recognition sensors, can be met by adjusting the thickness of the waterproof layer 210 covering the surface of the cover plate 300 corresponding to the hole 110.

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

[0080] In one embodiment, referring to Figure 4 the structural schematic diagram of the display module shown, the composite tape 200 further includes: a support layer 220, located between the waterproof layer 210 and the display panel 100, and the orthographic projection of the support layer 220 on the plane where the display panel 100 is located overlaps with the orthographic projection of the waterproof layer 210 on the plane where the display panel 100 is located. Thus, the support layer 220 can support the waterproof layer 210 and improve the production yield of the waterproof layer 210. It can be understood that compared with the hole corresponding to the camera, the holes corresponding to the infrared sensor and / or the fingerprint recognition sensor are smaller, and the structural design of the buffer layer 230 and the waterproof layer 210 in this embodiment can be adopted for the holes corresponding to the infrared sensor and / or the fingerprint recognition sensor. Thus, the setting 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 on the plane where the display panel 100 is located is within the orthographic projection range of the waterproof layer 210 on the plane where the display panel 100 is located. At this time, the support layer 220 is a whole film layer.

[0082] For example, the support layer 220 is a backing protection film (BPF for short), and the material of the support layer 220 is a conventional material, which will not be elaborated here.

[0083] For example, the orthographic projection of the support layer 220 on the plane where the display panel 100 is located coincides with the orthographic projection of the display panel 100 on 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. Thus, setting the optical adjustment material in the waterproof layer corresponding to the hole provided for the corresponding camera is conducive to meeting the light requirements of the hole.

[0085] It can be understood that through holes corresponding to the holes 110 are provided in the support layer 220. The orthographic projection of the through holes in the support layer 220 on the waterproof layer 210 covers the orthographic projection of the holes 110 on the waterproof layer 210.

[0086] In one embodiment, referring to Figure 5 the structural schematic diagram of the display module shown, the composite tape 200 further includes: a buffer layer 230, the buffer layer 230 is located between the support layer 220 and the waterproof layer 210, and the orthographic projection of the buffer layer on the plane where the display panel 100 is located overlaps with the orthographic projection of the waterproof layer 210 on the plane where the display panel 100 is located. Thus, when the display module is impacted, the buffer layer 230 can play a buffering role to reduce the damage to the display panel 100 caused by the impact; at the same time, when the waterproof layer 210 is fabricated by a heating method, it can effectively insulate heat and reduce the damage to the display panel 100 caused by high temperature.

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

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

[0089] For example, both opposite sides of the buffer layer 230 have an adhesive for bonding the buffer layer 230 to the waterproof layer 210 and the support layer 220. For example, the adhesive can be a double-sided tape (DST).

[0090] It can be understood that through holes corresponding to the holes 110 are provided in the buffer layer 230. The orthographic projection of the through holes in the buffer layer 230 on the waterproof layer 210 covers the orthographic projection of the holes 110 on the waterproof layer 210.

[0091] In one embodiment, referring to Figure 6 the structural schematic diagram of the display module shown, the composite tape 200 further includes: a functional layer 240, and the functional layer 240 is located on the side of the waterproof layer 210 away from the display panel 100.

[0092] It can be understood that through holes corresponding to the holes 110 are provided in the functional layer 240. The orthographic projection of the through holes in the functional layer 240 on the waterproof layer 210 covers the orthographic projection of the holes 110 on 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, and the metal layer is located on the side of the impact-resistant layer away from the display panel. Thus, the metal layer can conduct the static electricity of the display panel to reduce the influence 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 includes at least one of copper foil, aluminum foil, and stainless steel (SUS); the impact-resistant layer includes silicone gel and / or polyethylene terephthalate (PET).

[0095] Optionally, the composite tape further includes: an adhesive layer 250, which is located between the waterproof layer 210 and the functional layer 240 and is used to bond the waterproof layer 210 and the functional layer 240. For example, the adhesive layer 250 includes double-sided tape (DST).

[0096] In one embodiment, referring to Figure 7 the structural schematic diagram of the display module shown, the composite tape 200 further includes: a support layer 220, which is located between the waterproof layer 210 and the display panel 100, and the orthographic projection of the support layer 220 on the plane where the display panel 100 is located overlaps with the orthographic projection of the waterproof layer 210 on the plane where the display panel 100 is located. Thus, the support layer 220 can support the waterproof layer 210 and improve the manufacturing yield of the waterproof layer 210.

[0097] In one embodiment, referring to Figure 7, the composite tape 200 further includes: a buffer layer 230, which is arranged on the same layer as the waterproof layer 210, and the orthographic projection of the support layer 220 on 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 on the plane where the display panel 100 is located. Thus, when the display module is impacted, the buffer layer 230 can play a buffering role to reduce the damage to the display panel 100 caused by the impact. It can be understood that the hole corresponding to the camera is relatively large, and the structure design of the buffer layer 230 and the waterproof layer 210 of this embodiment can be adopted for the hole corresponding to the camera. Thus, the setting 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-integral film layer.

[0098] Exemplarily, the orthographic projection of the buffer layer 230 on the display panel 100 is adjacent to the orthographic projection of the waterproof layer 210 on the display panel 100.

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

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

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

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

[0103] In one embodiment, referring to Figure 8 The structural diagram of the display module shown in the figure further includes: a polarizer 400, which is located between the display panel 100 and the cover plate 300. The polarizer 400 can reduce the reflection effect of the display module and improve the display quality of the display module.

[0104] In one embodiment, referring to Figure 9 The structure diagram of the display module shown in the figure further includes: an optical adhesive layer 500, which is located between the polarizer 400 and the cover plate 300. Therefore, the optical adhesive layer 500 can effectively protect the polarizer 400, and can also play a role in flattening, thereby improving the impact resistance and display effect of the display module.

[0105] The second aspect of the present application provides a method for preparing a display module, referring to Figure 10 The schematic flow chart of the preparation method shown in the figure shows that the preparation method of the display module includes the following steps.

[0106] S100: A composite tape including a waterproof material layer is provided.

[0107] It should be noted that the material of the waterproof material layer includes hot melt adhesive, and the hot melt adhesive is consistent with the previous description, which will not be elaborated here.

[0108] In one embodiment, referring to Figure 11 and Figure 12 The structure schematic diagram of the display panel and the composite tape including the waterproof material layer shown is that the waterproof material layer 21 is hot melt adhesive. The hot melt adhesive is a relatively flat film layer before being heated and softened. It is easy to prepare and can be directly adhered to the non-display side of the display panel with the composite tape.

[0109] In the prior art, in order to achieve a waterproof effect in the area where the hole of the display panel is located, glue is directly applied to the hole, and the glue fills the hole, affecting the optical performance in the hole. In the embodiment of the present application, the hot melt adhesive is first formed in the composite tape, and then the hot melt adhesive is heated to extend to the hole of the display panel to cover the side wall of the hole enclosed by the display panel. The preparation method is simple and easy to implement, and the thickness of the hot melt adhesive covering the side wall of the hole can be controlled, which will hardly affect the optical performance in the hole.

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

[0111] S200: providing a display panel, wherein the display panel is provided with a hole.

[0112] It should be noted that the display panel is consistent with the previous description and will not be elaborated here.

[0113] In one embodiment, the holes in the display panel include at least one of a hole corresponding to an infrared sensor, a hole corresponding to a camera, and a hole corresponding to a fingerprint recognition sensor. At least one of the holes corresponding to the infrared sensor, the holes corresponding to the camera, and the holes corresponding to the fingerprint recognition sensor has different requirements for optical performance. For example, the hole corresponding to the camera requires a strong light transmittance, while the hole corresponding to the infrared sensor and / or the hole corresponding to the fingerprint recognition sensor needs to shield the light to achieve a matte display effect.

[0114] It should be noted that the arrangement of the waterproof layer in the hole is consistent with the previous description and will not be elaborated here.

[0115] S300: attaching a composite tape to the non-display side of the display panel.

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

[0117] S400: heating the waterproof material layer, and the softened waterproof material layer extends from the non-display side hole to the side wall covering the hole enclosed by the display panel to form a waterproof layer, thereby obtaining a display module.

[0118] It should be noted that the waterproof layer is consistent with the previous description and will not be elaborated here.

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

[0120] Exemplarily, the hole is a hole corresponding to the camera setting, and the waterproof layer covering the surface of the cover plate in the hole is a convex lens. When the waterproof material layer is heated by 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 enclosed by the display panel and the waterproof layer covering the surface of the cover plate in the hole is a convex lens; when the waterproof material layer is heated by positive pressure hot air baking, the airflow can be adjusted so that the waterproof layer covers the side wall of the hole enclosed by the display panel and the waterproof layer covering the surface of the cover plate in 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 enclosed by the display panel and the waterproof layer covering the surface of the cover plate in the hole is a convex lens. It can be understood that the shape of the electric heating copper rod, the airflow of the positive pressure hot air or the laser spot can be adjusted according to actual needs to obtain a waterproof layer of a desired shape.

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

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

[0123] 1. Prepare a composite tape, which includes a support layer, a waterproof material layer, a buffer layer and a functional layer stacked in sequence.

[0124] 2. Provide a display panel, in which a hole corresponding to the camera setting is opened.

[0125] 3. Attach the composite tape to the non-display side of the display panel. Specifically, attach the surface of the support layer that is 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, so that the waterproof material layer is softened by the heat and extends toward the hole of the display panel to cover the side wall of the display panel enclosing the hole and the surface of the cover plate corresponding to the hole.

[0127] 5. After the waterproof material layer is cured, a waterproof layer is obtained.

[0128] In a 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 preparing the display module includes the following steps:

[0129] 1. Manufacture a composite tape, which includes a support layer, a buffer layer, and a functional layer stacked in sequence, and the waterproof material layer is arranged on the same layer as the buffer layer; wherein, the preparation method of the waterproof material layer is: disperse scattering particles in hot melt adhesive, and bond the cured material to one side of the support layer, and make the waterproof material layer arranged on the same layer as the buffer layer.

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

[0131] 3. Bond the composite tape to the non-display side of the display panel. Specifically, bond the surface of the support layer facing away from the waterproof material layer to the non-display side of the display panel.

[0132] 4. Use a heating copper bar to heat the waterproof material layer to make the waterproof material layer soften by heat, extend towards the holes of the display panel until it covers the side walls of the holes surrounded by the display panel and the surface of the cover plate corresponding to the holes.

[0133] 5. After the waterproof material layer is cured, a waterproof layer is obtained.

[0134] The third aspect of the present application provides a display device, which includes the above-mentioned display module, or includes the display module prepared by the above-mentioned preparation method.

[0135] It should be noted that the display module is the same as the previous description and will not be elaborated here too much.

[0136] It should be noted that in addition to including the above-mentioned display module, the display device may also include structures that a conventional display device should have, such as a housing, a chip, etc., and will not be elaborated here too much.

[0137] It should be noted that for the display device of the embodiment of the present application, a matte display effect can be achieved at the holes corresponding to the infrared sensor, and / or a supplementary light effect can be achieved at the holes corresponding to the camera, and the imaging effect is excellent.

[0138] Exemplarily, the display device can be an Organic Electroluminescence Display (OLED for short) display device or a Liquid Crystal Display (LCD for short) display device, etc.

[0139] Exemplarily, the display device can be used to display static pictures and can also be used to display dynamic pictures. The display device can be used for color display and can also be used for black and white display.

[0140] Exemplarily, the display device may be a flexible display device, such as a tablet, a mobile phone, a wearable device, etc.

[0141] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present application. In addition, the above-disclosed specific details are only for the purposes of illustration and facilitation of understanding, rather than limitations. These details do not limit the present application to necessarily adopt the above specific details for implementation.

[0142] The above description has been given for purposes of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof.

Claims

1. A display module, characterized in that: include: A display panel, wherein the display panel is provided with a hole; The composite tape is at least partially located on the non-display side of the display panel, and the composite tape includes a waterproof layer, which extends from the non-display side into the hole to cover the side wall of the display panel enclosing the hole.

2. The display module according to claim 1, characterized in that: The waterproof layer includes at least one of scattering particles, optical adjustment materials, pigments and dyes; Preferably, the scattering particles include silica gel particles; Preferably, the optical adjustment material comprises optical glue; Preferably, the optical glue comprises black light-shielding glue; Preferably, the waterproof layer comprises hot melt adhesive; Preferably, the hot melt adhesive comprises at least one of ethylene-vinyl acetate copolymer, polyolefin copolymer, polyurethane, polyamide and polyethersulfone; Preferably, the hole includes at least one of a hole corresponding to an infrared sensor, a hole corresponding to a camera, and a hole corresponding to a fingerprint recognition sensor.

3. The display module according to claim 1, characterized in that: The display module further includes a cover plate, the cover plate is located on a side of the display panel away from the composite tape, the cover plate covers the hole, and the waterproof layer covers a surface of the cover plate corresponding to the hole; Preferably, the display module further comprises a polarizer, which is located between the display panel and the cover plate; Preferably, the display module further comprises: an optical adhesive layer located between the polarizer and the cover plate.

4. The display module according to claim 3, characterized in that: The waterproof layer includes a convex lens, and the convex lens is located in the hole; Preferably, the convex surface of the convex lens is away from the cover plate; Preferably, the waterproof layer comprises an optical adjustment material; Preferably, the optical adjustment material comprises optical glue; Preferably, the hole includes a hole corresponding to a camera setting.

5. The display module according to claim 3, characterized in that: The thickness of the waterproof layer covering the side wall of the display panel enclosing the hole is greater than 0 and less than or equal to 0.35 nm; Preferably, 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.

6. The display module according to claim 1, characterized in that: 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 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; Preferably, 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 on the plane where the display panel is located; Preferably, the composite tape further comprises: a buffer layer, the buffer layer 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; Preferably, the orthographic projection of the buffer layer on the plane where the display panel is located is within the orthographic projection range of the waterproof layer on the plane where the display panel is located; Preferably, the orthographic projection of the buffer layer on the plane where the display panel is located is within the orthographic projection range of the support layer on the plane where the display panel is located; Preferably, the composite tape further comprises: a functional layer, the functional layer being located on a side of the waterproof layer away from the display panel; Preferably, the functional layer comprises at least one of a metal layer and an impact-resistant layer; Preferably, the functional layer comprises a metal layer and an impact-resistant layer, and the metal layer is located on a side of the impact-resistant layer away from the display panel; Preferably, the composite tape further comprises: an adhesive layer, located between the waterproof layer and the functional layer, and used for bonding the functional layer and the waterproof layer.

7. The display module according to claim 1, characterized in that: 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 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; Preferably, the composite tape further comprises: a buffer layer, which is arranged at 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 located within the orthographic projection range of the waterproof layer and the buffer layer on the plane where the display panel is located; Preferably, in a direction perpendicular to the plane where the display panel is located, the thickness of the buffer layer is greater than the thickness of the waterproof layer; Preferably, in a direction perpendicular to the plane where the display panel is located, the thickness of the waterproof layer located inside the hole is smaller than the thickness of the waterproof layer located outside the hole; Preferably, the thickness of the waterproof layer outside the hole in a direction perpendicular to the plane where the display panel is located is greater than the width of the waterproof layer inside the hole in a direction parallel to the plane where the display panel is located; preferably, the composite tape further includes: a functional layer, located on the side of the buffer layer away from the display panel, the orthographic projection of the functional 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.

8. A method for preparing a display module, characterized in that: include: providing a composite tape including a layer of waterproof material; Providing a display panel, wherein the display panel is provided with a hole; Laminating the composite tape on the non-display side of the display panel; The waterproof material layer is heated, and the softened waterproof material layer extends from the non-display side into the hole to cover the side wall of the hole enclosed by the display panel to form a waterproof layer, thereby obtaining the display module.

9. The preparation method according to claim 8, characterized in that: The method of heating the waterproof material layer includes at least one of electric copper rod heating, positive pressure hot air baking and laser heating.

10. A display device, characterized in that: The display module comprises any one of claims 1 to 7, or comprises a display module prepared by the preparation method of claim 8 or 9.

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