Display module and display device

Abstract

The display module comprises a panel and a cover plate attached to the light emitting side of the panel, the panel is provided with a display area, an open hole is formed in the display area, the open hole penetrates through the panel in the direction perpendicular to the surface of the cover plate to the surface, facing the panel, of the cover plate, the panel is provided with a first cutting edge on the peripheral side of the open hole, and the first cutting edge is provided with a second cutting edge on the peripheral side of the open hole. A protective layer is arranged on the first cutting edge and comprises a first area, and the first area at least wraps the first cutting edge. According to the display module, the cutting edge of the panel can be reliably protected, the risk of water and oxygen invasion is reduced, the display effect of the display module is guaranteed, and the yield and competitiveness of products are improved.

Description

Technical Field

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

[0002] With the development of display technology, people have higher and higher requirements for display panels. At present, in order to be used in conjunction with devices such as cameras, it is often necessary to set openings on the display panel. For example, for the display panel used in a mobile phone, in order to facilitate the installation of the front camera, an opening for the camera to pass through can be opened in the display panel.

[0003] The AA (Active Area) hole structure of existing OLED (Organic Light-Emitting Diode) products is relatively weak. The hole is usually made after the display panel is manufactured. After the MDL (Module) is cut to form the hole, peeling or micro-cracks are prone to occur on the edge of the panel. During the reliability process, water vapor intrusion is prone to occur, forming GDSH (Growing Dark Spot), causing failure of the AA area. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a display module and a display device, by setting a protective layer on the first cutting edge of the panel, the protective layer covers the first cutting edge, so as to effectively isolate the first cutting edge of the panel from water and oxygen, and reduce the risk of water and oxygen intrusion, which is beneficial to ensure the display effect of the display module, avoid display failure, and improve the product yield and product competitiveness of the display module.

[0005] In a first aspect, the present invention provides a display module, comprising: A panel and a cover plate attached to the light-emitting side of the panel, the panel having a display area, the display area forming an opening, the opening penetrating the panel along a direction perpendicular to the surface of the cover plate to the surface of the cover plate facing the panel, the panel forming a first cutting edge around the opening, a protective layer being arranged on the first cutting edge, the protective layer comprising a first region, and the first region at least covers the first cutting edge.

[0006] As an optional solution, the protective layer includes a sealant, and the sealant is coated on at least the first cutting edge and solidified to form the protective layer.

[0007] As an alternative, the protective layer may extend onto the surface of the cover plate facing the panel.

[0008] As an optional solution, the display module further includes a polarizer, a light-transmitting adhesive layer and a back film, wherein the polarizer is arranged on the light-emitting side of the panel, the cover plate is attached to the polarizer through the light-transmitting adhesive layer, and the back film is arranged on the surface of the panel away from the cover plate; In a direction perpendicular to the cover plate, the polarizer and the light-transmitting adhesive layer form a second cutting edge around the opening, and the back film forms a third cutting edge around the opening.

[0009] As an optional solution, in a direction parallel to the cover plate, the second cutting edge protrudes from the first cutting edge, the first cutting edge protrudes from the third cutting edge, and the protective layer further includes a second area and a third area; The first region also covers the surface of the polarizer that protrudes from the first cut edge and faces the panel; The second region covers the second cut edge; The third region covers the third cutting edge and a surface of the panel that is protruding from the third cutting edge and is away from the cover plate.

[0010] As an optional solution, in a direction parallel to the cover plate, the first area close to the edge of the opening, the second area close to the edge of the opening, and the third area close to the edge of the opening are flush.

[0011] As an optional solution, in a direction parallel to the cover plate, the second cutting edge protrudes from the first cutting edge, the first cutting edge protrudes from the third cutting edge, a first via hole is provided at a portion of the polarizer protruding from the first cutting edge, the first via hole extends from a surface of the polarizer facing the panel in a direction away from the panel, and the first via hole extends to a maximum extent to a surface of the cover plate facing the panel; The first region may extend to the interior of the first via hole; The protection layer also includes a fourth region, which covers the third cutting edge and a surface of a portion of the panel protruding from the third cutting edge and facing away from the cover plate.

[0012] As an optional solution, in a direction parallel to the cover plate, the second cutting edge protrudes from the first cutting edge, and the third cutting edge protrudes from the first cutting edge; A second via hole is formed in a portion of the back film protruding from the first cutting edge, and the second via hole extends from a surface of the back film away from the panel in a direction perpendicular to the cover plate; The first region may extend to an interior of the second via hole.

[0013] As an optional solution, the second via hole extends to the maximum extent of the surface of the cover plate facing the panel. As an optional solution, in a direction parallel to the cover plate, the second cutting edge is flush with the third cutting edge.

[0014] As an optional solution, the display module further includes a heat dissipation layer, which is arranged on the backlight side of the panel.

[0015] As an optional solution, an orthographic projection of the heat dissipation layer in a direction perpendicular to the cover plate overlaps with an orthographic projection of the protection layer in a direction perpendicular to the cover plate.

[0016] In a second aspect, the present invention provides a display device, comprising the display module of the first aspect.

[0017] In the display module of the present invention, an opening is formed in the display area of ​​the panel, and a first cutting edge is formed on the panel along the circumference of the opening in a direction perpendicular to the cover plate. A protective layer is provided on the first cutting edge, and the protective layer covers at least the first cutting edge. The protective layer is conducive to isolating the first cutting edge from contact with external water and oxygen, so that the first cutting edge structure of the panel is sealed, and the invasion of external water and oxygen into the display area of ​​the panel is avoided, the risk of water and oxygen invasion is reduced, and the occurrence of growing dark spots is avoided, which causes the problem of failure of the display area, thereby ensuring the display effect of the display area and improving the product yield and product competitiveness of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a structural schematic diagram of a display module in the prior art; Figure 2 This is a schematic diagram of the structure of a display module in an embodiment of the present application; Figure 3 This is a schematic structural diagram of a cutting edge of a first display module in an embodiment of the present application; Figure 4 This is a schematic structural diagram of a first display module after a protective layer is provided on the cutting edge of the display module in the embodiment of the present application; Figure 5 for Figure 4 The view along the Y direction; Figure 6 This is a schematic structural diagram of the cutting edge arrangement of the second display module in the embodiment of the present application; Figure 7 This is a schematic structural diagram of a second display module after a protective layer is provided on the cutting edge of the display module in the embodiment of the present application; Figure 8 for Figure 7 The view along the Y direction; Fig. 9 This is a schematic structural diagram of the cutting edge arrangement of the third display module in the embodiment of the present application; Fig.10 This is a schematic structural diagram of a third display module after a protective layer is provided on the cutting edge of the display module in the embodiment of the present application; Fig.11 for Fig.10 The view along the Y direction; In the figure, 10. panel, 11. first cutting edge, 12. opening; 20. Cover plate; 30. protective layer, 31. first region, 32. second region, 33. third region, 34. fourth region; 40. polarizer, 41. second cutting edge, 42. first via hole; 50. Light-transmitting adhesive layer; 60, back film, 61, third cutting edge, 62, second via hole; 70. Heat dissipation layer. DETAILED DESCRIPTION

[0019] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] like Figure 1 As shown, Figure 1 A schematic diagram of the structure of a display module with an opening in the display area of ​​an OLED product in the related art is shown. After the display area of ​​the display module is opened, delamination or cracks are likely to occur at the edge of the panel, which may lead to easy intrusion of water and oxygen during the reliability process, and then corrosion may occur, causing failure of the display area and forming growth dark spots, thereby affecting the display effect of the display module and reducing the display quality of the display module.

[0022] Based on the above problems, an embodiment of the present application provides a display module, such as Figure 2 As shown, including: A panel 10 and a cover plate 20 attached to the light emitting side of the panel 10, the panel 10 having a display area, the display area being formed with an opening 12, the opening 12 penetrating the panel 10 along a direction perpendicular to the surface of the cover plate 20 to the surface of the cover plate 20 facing the panel 10, the panel 10 being formed with a first cutting edge 11 around the opening 12, a protective layer 30 being arranged on the first cutting edge 11, the protective layer 30 including a first region 31, the first region 31 at least covering the first cutting edge 11.

[0023] It can be understood that the panel 10 may include a base substrate, and a driving layer, a light emitting layer, and a packaging layer stacked in a direction away from the base substrate.

[0024] Among them, the substrate plays a certain supporting role for the panel 10. When making the display panel 10, an opening area will be reserved, and the surrounding side of the opening area is the display area, so that functional components with other functions, such as cameras, can be placed in the opening area. The substrate can be but not limited to glass, PI (Polyimide), PET (Polyethyleneglycol terephthalate), silicon (single crystal silicon or polycrystalline silicon), etc. In the embodiment of the present application, the substrate can be a silicon base, such as single crystal silicon, and the corresponding display panel is a silicon-based display panel.

[0025] A buffer layer is also stacked on the substrate, and the buffer layer is used to protect the substrate. In some embodiments, a driving layer and a light-emitting layer are stacked on the buffer layer in sequence. The driving layer includes a pixel driving circuit and a circuit layer, the pixel driving circuit includes a plurality of transistors and at least one capacitor, the circuit layer includes a plurality of metal layers and a plurality of interlayer insulating layers, each metal layer is isolated from the transistor by the interlayer insulating layer, and is coupled to the transistor through a contact hole, so that the electrical signal (such as a driving voltage or a driving current) in the pixel driving circuit can be sequentially transmitted through the transistor, each metal layer, and then transmitted to the light-emitting layer to drive the light-emitting layer to emit light.

[0026] It can also be understood that a pixel defining layer is provided on the substrate, and the pixel defining layer can separate each sub-pixel of the light-emitting layer to prevent each sub-pixel from interfering with each other in the display panel. Optionally, the pixel defining layer can be made of a light-transmitting material so that the light of the light-emitting layer can better pass through the pixel defining layer. Optionally, the pixel defining layer can be made of an opaque material, which can improve the light absorption of the pixel defining layer, reduce the reflectivity of the display panel, further reduce the optical crosstalk between adjacent light-emitting layers, and improve the display effect of the display panel.

[0027] The light-emitting layer includes a first electrode, a light-emitting functional layer and a second electrode. The first electrode is a cathode, and the second electrode is an anode. The material of the first electrode may be, but is not limited to, indium tin oxide (ITO), indium zinc oxide (IZO), a metal or an alloy (such as magnesium, titanium, silver or an alloy formed by multiple metals); the material of the second electrode may be, but is not limited to, a metal such as titanium, silver or an alloy formed by multiple metals such as titanium, silver or the like; the light-emitting functional layer includes a light-emitting material layer, a hole injection layer, a hole transport layer, an electron blocking layer, an electron injection layer, an electron transport layer and a hole blocking layer.

[0028] Optionally, the light-emitting layer may be a single type of light-emitting device, which is a light-emitting device that can emit a single color of light, for example, a light-emitting device that can emit white light. Optionally, the light-emitting layer may also be different types of light-emitting devices, which are light-emitting devices that can emit different colors of light, for example, any number of light-emitting devices that can emit blue light, light-emitting devices that can emit red light, light-emitting devices that can emit green light, light-emitting devices that can emit yellow light, and light-emitting devices that can emit white light.

[0029] The encapsulation layer on the side of the light-emitting layer facing away from the substrate generally includes an organic encapsulation layer and a first inorganic encapsulation layer and a second inorganic encapsulation layer arranged alternately. Exemplarily, the encapsulation layer is a three-layer stacked structure, specifically including a first inorganic encapsulation layer, a second inorganic encapsulation layer, and an organic encapsulation layer located between the first inorganic encapsulation layer and the second inorganic encapsulation layer.

[0030] It should be noted that the display area of ​​the panel 10 has an opening 12, and the opening 12 runs through the entire panel 10, that is, the opening 12 runs through the encapsulation layer, the drive layer to the substrate or runs through the substrate. The opening 12 may be a physical hole formed by laser cutting, and a camera or sensor structure may be arranged below the physical hole; the shape of the opening 12 may be a regular shape or an irregular shape such as a circle, an ellipse, a triangle, a rectangle, a polygon, etc., and the embodiment of the present application does not specifically limit the shape of the opening 12.

[0031] The cover plate 20 is generally a glass cover plate, which is attached to the light-emitting side of the panel 10 to protect the structure of the panel 10. Since the cover plate 20 is attached to the light-emitting side of the panel 10 after the entire panel 10 structure is prepared, the opening 12 does not penetrate the cover plate 20. Along the direction perpendicular to the cover plate 20, the panel 10 is formed with a first cutting edge 11 around the opening 12, and a protective layer 30 is provided on the first cutting edge 11. The protective layer 30 at least covers the first cutting edge 11, thereby protecting the first cutting edge 11 formed on the panel 10 due to the opening 12, so that the first cutting edge 11 of the panel 10 is isolated from external water and oxygen, thereby reducing the risk of water and oxygen invading the light-emitting layer, ensuring that the light-emitting layer can emit light reliably, and thus preventing water and oxygen from damaging the display effect of the display module.

[0032] It can also be understood that the protective layer 30 can have an organic material layer with good resistance to water and oxygen corrosion, such as but not limited to PO (polyolefin copolymer). In this way, the protective layer 30 can be bonded to the first cutting edge 11 through an adhesive layer so that it completely covers the first cutting edge 11; of course, in some embodiments, the protective layer 30 can also be a pressure-sensitive adhesive or other sealant, which is directly coated on the first cutting edge 11 to form a protective layer 30 to protect the first cutting edge 11; and the thickness of the protective layer 30 can be determined according to the actual material, as long as it can ensure reliable isolation from water and oxygen. The embodiments of the present application do not specifically limit the material and thickness of the protective layer 30.

[0033] In some embodiments, in addition to covering the first cutting edge 11, the protective layer 30 may also cover a portion of the surface of the panel 10 that is away from the cover plate 20 or toward the cover plate 20. In this way, the protective layer 30 forms an "L-shaped" or "U-shaped" covering structure on the panel 10, which is beneficial to reliably protect the panel 10 structure, further isolate water and oxygen, avoid water and oxygen intrusion, and ensure the display effect of the display module.

[0034] The display module of the embodiment of the present application solves the problem of the display module of the prior art that the opening 12 in the display area easily causes the panel 10 to be delaminated or cracked, resulting in the intrusion of water and oxygen. The display module of the embodiment of the present application sets a protective layer 30 on the first cutting edge 11 of the panel 10. The protective layer 30 covers at least the first cutting edge 11. The protective layer 30 is conducive to isolating the first cutting edge 11 from contact with external water and oxygen, so that the first cutting edge 11 of the panel 10 is structurally sealed, avoiding the intrusion of external water and oxygen into the display area of ​​the panel 10, reducing the risk of water and oxygen intrusion, avoiding the occurrence of growing dark spots, and causing the display area to fail, thereby ensuring the display effect of the display area and improving the product yield and product competitiveness of the display module.

[0035] In a preferred embodiment, the protective layer 30 includes a sealant, and the sealant is coated on at least the first cutting edge 11 and cured to form the protective layer 30 .

[0036] In the present embodiment, the protective layer 30 is formed by coating the sealant on the first cutting edge 11 and curing it. The preparation process is simple and the processing is convenient. It can reliably protect the first cutting edge 11 of the panel 10 and avoid the invasion of water and oxygen, thereby ensuring the display effect of the display panel 10 and improving the product yield and product competitiveness of the display module.

[0037] It is understandable that the sealant may be a sealant with high light transmittance, which is helpful to avoid affecting the display effect of the panel 10 .

[0038] As an implementable manner, the protection layer 30 may extend to the surface of the cover plate 20 facing the panel 10 .

[0039] In this embodiment, the protective layer 30 can extend to the surface of the cover plate 20 facing the panel 10, which means that the protective layer 30 extends to the surface of the cover plate 20 facing the panel 10 along a direction perpendicular to the panel 10. This is beneficial to improving the ability to isolate water and oxygen, ensuring that the panel 10 has a good display effect.

[0040] As an achievable method, Figure 3-11 As shown, the display module further includes a polarizer 40 (POL), a transparent adhesive layer 50 and a back film 60. The polarizer 40 is arranged on the light-emitting side of the panel 10, the cover plate 20 is attached to the polarizer 40 through the transparent adhesive layer 50, and the back film 60 is arranged on the surface of the panel 10 away from the cover plate 20; In a direction perpendicular to the cover plate 20 (eg Figure 3 In the Y direction), the polarizer 40 and the light-transmitting adhesive layer 50 form a second cutting edge 41 on the side surrounding the opening 12, and the back film 60 forms a third cutting edge 61 on the side surrounding the opening 12.

[0041] Among them, the polarizer 40 is arranged on the light-emitting side of the panel 10, and has the functions of adjusting the polarization direction of light, controlling the brightness of pixel points and improving the display effect in OLED products; the cover plate 20 is attached to the polarizer 40 through the transparent adhesive layer 50; the back film 60 has a protective function, such as but not limited to U-Film, which is used to protect the structure of the panel 10.

[0042] As described above, the display area of ​​the panel 10 forms an opening 12, and the opening 12 passes through the direction perpendicular to the cover plate 20. Correspondingly, in the direction perpendicular to the cover plate 20, the polarizer 40 and the light-transmitting adhesive layer 50 form a second cutting edge 41 around the opening 12, and the back film 60 forms a third cutting edge 61 around the opening 12.

[0043] The protective layer 30 may also extend to cover the second cutting edge 41 and the third cutting edge 61 to further improve the effect of isolating water and oxygen.

[0044] As an achievable method, Figure 4 As shown, in a direction parallel to the cover plate 20 (such as Figure 4 In the X direction), the second cutting edge 41 protrudes from the first cutting edge 11, the first cutting edge 11 protrudes from the third cutting edge 61, and the protective layer 30 further includes a second area 32 and a third area 33; The first region 31 also covers the portion of the polarizer 40 protruding from the first cutting edge 11 toward the surface of the panel 10 ; The second region 32 covers the second cutting edge; The third region 33 covers the third cutting edge 61 and a portion of the surface of the panel 10 protruding from the third cutting edge 61 and facing away from the cover plate 20 .

[0045] It can be understood that the second cutting edge 41 protrudes from the first cutting edge 11, and the first cutting edge 11 protrudes from the third cutting edge 61, so a step is formed between the cutting edges of the polarizing layer, the light-transmitting adhesive layer 50, the panel 10 and the back film 60. The first area 31 of the protective layer 30 covers the first cutting edge 11 of the panel 10, and also covers the surface of the polarizer 40 protruding from the first cutting edge 11 toward the panel 10. The second area 32 covers the second cutting edge 41, and the third area 33 covers the third cutting edge 61 while covering the surface of the area of ​​the panel 10 protruding from the third cutting edge 61 away from the cover plate 20, forming an "L-shaped" protective layer 30 structure on the panel 10, which is conducive to reliably isolating water and oxygen and ensuring the display effect of the display module.

[0046] This embodiment has a good protective effect on the panel 10 and can reliably isolate water and oxygen, thereby reliably avoiding failure of the display area.

[0047] In some embodiments, in a direction perpendicular to the cover plate 20, the second region 32 may also only cover the area on the second cutting edge 41 close to the panel 10, and the third region 33 may also only cover the area on the third cutting edge 61 close to the panel 10, which is beneficial to reduce the usage of the protective layer 30 and save resources.

[0048] In a preferred embodiment, in a direction parallel to the cover plate 20 (eg Figure 4 In the X direction, the first area 31 is close to the edge of the opening 12, the second area 32 is close to the edge of the opening 12, and the third area 33 is close to the edge of the opening 12 and is flush.

[0049] In this embodiment, the first area 31, the second area 32 and the third area 33 of the protective layer 30 are each flush with the edge of the opening, which helps to reduce the impact on the internal components of the opening 12 (such as but not limited to the camera) and ensure the normal operation of the internal components of the opening 12.

[0050] As an achievable method, Figure 6 and 7 As shown, in a direction parallel to the cover plate 20, the second cutting edge 41 protrudes from the first cutting edge 11, the first cutting edge 11 protrudes from the third cutting edge 61, and a first via hole 42 is provided at a portion of the polarizer 40 protruding from the first cutting edge 11. The first via hole 42 extends from the surface of the polarizer 40 facing the panel 10 to a direction away from the panel 10, and the first via hole 42 extends to the surface of the cover plate 20 facing the panel 10 at its maximum. The first region 31 may extend to the inside of the first via hole 42; The protection layer 30 further includes a fourth region 34 , which covers the third cutting edge 61 and a portion of the surface of the panel 10 protruding from the third cutting edge 61 and facing away from the cover plate 20 .

[0051] The first via hole 42 can penetrate to any area inside the polarizer 40; the first via hole 42 can also penetrate the polarizer 40 to the surface of the light-transmitting adhesive layer 50 facing the panel 10; of course, the first via hole 42 can also penetrate the entire polarizer 40 and the light-transmitting adhesive layer 50 to the surface of the cover plate 20 facing the panel 10, as long as the structure of the cover plate 20 is not damaged. The first via hole 42 is used to form an escape space. When the sealant is applied to form the protective layer 30, the first via hole 42 is conducive to the flow of the sealant into the first via hole 42. On the one hand, it is conducive to reliably sealing the first cutting edge 11 of the panel 10 while reducing the impact on the structure of the opening 12. On the other hand, it is conducive to controlling the amount of sealant used.

[0052] The first via hole 42 may be, but is not limited to, a circular, square, triangular or other regular or irregular shapes, which is not specifically limited in the embodiments of the present application.

[0053] In this embodiment, the provision of the first via hole 42 is helpful to control the amount of sealant used and can reliably isolate water and oxygen.

[0054] As an achievable method, Fig. 9 and 10 As shown, in a direction parallel to the cover plate 20 (such as Fig. 9 In the X direction), the second cutting edge 41 protrudes from the first cutting edge 11, and the third cutting edge 61 protrudes from the first cutting edge 11; A second through hole 62 is formed on the portion of the back film 60 protruding from the first cutting edge 11. The second through hole 62 extends from the surface of the back film 60 away from the panel 10 in a direction perpendicular to the cover plate 20 (eg Fig. 9 The Y direction in the middle extends; The first region 31 may extend to the inside of the second via hole 62 .

[0055] In the present embodiment, the first cutting edge 11 of the panel 10 is recessed relative to the second cutting edge 41 and the third cutting edge 61, which is beneficial to improving the protection effect of the panel 10, and a second via hole 62 is opened on the back film 60 in an area protruding from the first cutting edge 11, which is beneficial to accommodating the sealant, thereby sealing the first cutting edge 11 of the panel 10 while reducing the amount of sealant used, and facilitating processing.

[0056] It can be understood that the second via hole 62 is arranged along a direction perpendicular to the cover plate 20 (eg Fig. 9The second via hole 62 may only penetrate the back film 60 to the surface of the panel 10 (in the Y direction). Of course, the second via hole 62 may also penetrate into the interior of the polarizer 40, which is not specifically limited in the embodiments of the present application.

[0057] In some embodiments, the second via hole 62 extends to a maximum extent of the surface of the cover plate 20 facing the panel 10 .

[0058] In this embodiment, the processing technology of the second via hole 62 is simplified and the processing is convenient.

[0059] In some embodiments, in a direction parallel to the cover plate 20 (eg Fig. 9 In the X direction), the second cutting edge 41 is flush with the third cutting edge 61.

[0060] In this embodiment, the cutting edges of the back film 60, the polarizer 40 and the light-transmitting adhesive layer 50 are flush, which is conducive to simplifying the processing technology, reducing the processing technology requirements, and facilitating processing.

[0061] As an implementable manner, the display module further includes a heat dissipation layer 70 , and the heat dissipation layer 70 is disposed on the backlight side of the panel 10 .

[0062] The heat dissipation layer 70 may be, but is not limited to, copper foil.

[0063] In this embodiment, the heat dissipation layer 70 is helpful to improve the heat dissipation effect of the panel 10 and ensure the normal operation of the panel 10.

[0064] In some embodiments, after the protective layer 30 is provided, the SCF process is finally performed to prepare the heat dissipation layer 70 on the backlight side of the panel 10 .

[0065] In some embodiments, the orthographic projection of the heat dissipation layer 70 along a direction perpendicular to the cover plate 20 overlaps with the orthographic projection of the protection layer 30 along a direction perpendicular to the cover plate 20 .

[0066] For example, Figure 3-5As shown, the display module includes a panel 10, a back film 60 and a heat dissipation layer 70 are stacked on the backlight side of the panel 10 in a direction away from the panel 10, a polarizer 40, a light-transmitting adhesive layer 50 and a cover plate 20 are stacked on the light-emitting side of the panel 10 in a direction away from the panel 10, an opening 12 is formed in the display area of ​​the panel 10, and the opening 12 passes through the panel 10 in a direction perpendicular to the cover plate 20, a first cutting edge 11 is formed on the side of the opening 12 on the panel 10, the polarizer 40 and the light-transmitting adhesive layer 50 form a second cutting edge 41 on the side of the opening 12, and the back film 60 forms a third cutting edge 61 on the side of the opening 12, wherein the second cutting edge 41 protrudes in a direction parallel to the surface of the cover plate 20. At the first cutting edge 11, the first cutting edge 11 protrudes from the third cutting edge 61, the protective layer 30 includes a first area 31, a second area 32 and a third area 33, the first area 31 covers the first cutting edge 11 and the portion of the polarizer 40 protruding from the first cutting edge 11 facing the surface of the panel 10, the second area 32 covers the second cutting edge 41, the third area 33 covers the third cutting edge 61 and the portion of the panel 10 protruding from the third cutting edge 61 facing the surface of the back film 60, the heat dissipation layer 70 covers a portion of the third area 33, and the edge of the first area 31 facing the opening 12, the edge of the second area 32 facing the opening 12 and the edge of the third area 33 facing the opening 12 are flush.

[0067] For example, Figure 6-8As shown, the display module includes a panel 10, a back film 60 and a heat dissipation layer 70 are stacked on the backlight side of the panel 10 in a direction away from the panel 10, a polarizer 40, a light-transmitting adhesive layer 50 and a cover plate 20 are stacked on the light-emitting side of the panel 10 in a direction away from the panel 10, an opening 12 is formed in the display area of ​​the panel 10, the opening 12 penetrates the panel 10 in a direction perpendicular to the cover plate 20, a first cutting edge 11 is formed on the side of the opening 12 of the panel 10, the polarizer 40 and the light-transmitting adhesive layer 50 form a second cutting edge 41 on the side of the opening 12, and the back film 60 forms a third cutting edge 61 on the side of the opening 12, wherein, in a direction parallel to the surface of the cover plate 20, the second cutting edge 41 protrudes from the first cutting edge 11, and the first cutting The edge 11 protrudes from the third cutting edge 61, and a first via hole 42 is opened in the area of ​​the polarizer 40 protruding from the first cutting edge 11. The first via hole 42 penetrates from the surface of the polarizer 40 facing the panel 10 along the direction away from the panel 10 to the surface of the cover plate 20 facing the panel 10. The protective layer 30 includes a first area 31 and a fourth area 34. The first area 31 covers the first cutting edge 11 and extends to the inside of the first via hole 42. The fourth area 34 covers the third cutting edge 61 and the surface of the panel 10 away from the cover plate 20, and in a direction parallel to the surface of the cover plate 20, the edge of the fourth area 34 close to the opening 12 is flush with the edge of the first area 31 close to the opening 12; the heat dissipation layer 70 covers a portion of the third area 33.

[0068] For example, Figure 9-11 As shown, the display module includes a panel 10, a back film 60 and a heat dissipation layer 70 are stacked on the backlight side of the panel 10 in a direction away from the panel 10, a polarizer 40, a light-transmitting adhesive layer 50 and a cover plate 20 are stacked on the light-emitting side of the panel 10 in a direction away from the panel 10, an opening 12 is formed in the display area of ​​the panel 10, and the opening 12 passes through the panel 10 in a direction perpendicular to the cover plate 20, a first cutting edge 11 is formed on the side of the opening 12 on the panel 10, the polarizer 40 and the light-transmitting adhesive layer 50 form a second cutting edge 41 on the side of the opening 12, and the back film 60 forms a third cutting edge 6 on the side of the opening 12 1, wherein, in a direction parallel to the surface of the cover plate 20, the second cutting edge 41 protrudes from the first cutting edge 11, the third cutting edge 61 protrudes from the first cutting edge 11, and the second cutting edge 41 is flush with the first cutting edge 11; a second via hole 62 is opened in the area of ​​the back film 60 protruding from the first cutting edge 11, and the second via hole 62 penetrates along a direction perpendicular to the cover plate 20 from the surface of the polarizer 40 away from the panel 10 to the surface of the cover plate 20 facing the panel 10; the protective layer 30 includes a first area 31, the first area 31 covers the first cutting edge 11 and extends to the inside of the second via hole 62.

[0069] In summary, in the display module of the embodiment of the present application, the display area of ​​the panel 10 is formed with an opening 12, and the panel 10 is formed with a first cutting edge 11 along the peripheral side of the opening 12 in a direction perpendicular to the cover plate 20. By providing a protective layer 30 at the first cutting edge 11, the protective layer 30 covers at least the first cutting edge 11, and the protective layer 30 is conducive to isolating the first cutting edge 11 from contact with external water and oxygen, so that the first cutting edge 11 of the panel 10 is structurally sealed, and external water and oxygen are prevented from invading the display area of ​​the panel 10, reducing the risk of water and oxygen intrusion, avoiding the occurrence of growth dark spots, and the problem of failure of the display area, thereby ensuring the display effect of the display area and improving the product yield and product competitiveness of the display module; Furthermore, by forming the cutting edges of the polarizer 40, panel 10 and back film 60 around the opening 12 into a stepped shape and providing a protective layer 30 on each cutting edge, it is beneficial to improve the sealing of the panel 10, isolate water and oxygen, and ensure the display effect of the display module.

[0070] In a second aspect, the present invention provides a display device, including the display module 100 of the first aspect. It is understandable that the display device has all the features and advantages of the above display module, which will not be repeated here. In short, the display device has high quality and yield, high display resolution, and high product competitiveness.

[0071] For example, the display device is a product with an image display function. For example, the display device can be: a display, a television, a billboard, a digital photo frame, a laser printer with a display function, a telephone, a mobile phone, a personal digital assistant (PDA), a digital camera, a camcorder, a viewfinder, a navigator, a vehicle, a large-area wall, a home appliance, an information query device (such as business query equipment for e-government, banks, hospitals, power and other departments), a monitor, etc. The display device can also be a microdisplay or a product containing a microdisplay. The product containing a microdisplay can be any of a smart watch, a smart bracelet, a helmet display, a stereo display mirror, and an AR device (such as AR glasses), a VR device (such as VR glasses), etc. For example, a microdisplay can be a display with a display size ranging from about 0.2 inches to about 2.5 inches, but is not limited thereto. It can be understood that the microdisplay can also be a display with a smaller display size, such as a display size less than or equal to 0.2 inches.

[0072] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the panel or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0073] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A display module, characterized in that: include: A panel and a cover plate attached to the light-emitting side of the panel, the panel having a display area, the display area forming an opening, the opening penetrating the panel along a direction perpendicular to the surface of the cover plate to the surface of the cover plate facing the panel, the panel forming a first cutting edge around the opening, a protective layer being arranged on the first cutting edge, the protective layer comprising a first region, the first region at least covering the first cutting edge.

2. The display module according to claim 1, characterized in that: The protective layer includes a sealant, and the sealant is coated at least on the first cutting edge and solidified to form the protective layer.

3. The display module according to claim 1 or 2, characterized in that: The protection layer may extend onto a surface of the cover plate facing the panel.

4. The display module according to claim 3, characterized in that: The display module further includes a polarizer, a light-transmitting adhesive layer and a back film, wherein the polarizer is arranged on the light-emitting side of the panel, the cover plate is attached to the polarizer through the light-transmitting adhesive layer, and the back film is arranged on the surface of the panel away from the cover plate; In a direction perpendicular to the cover plate, the polarizer and the light-transmitting adhesive layer form a second cutting edge around the opening, and the back film forms a third cutting edge around the opening.

5. The display module according to claim 4, characterized in that: In a direction parallel to the cover plate, the second cutting edge protrudes from the first cutting edge, the first cutting edge protrudes from the third cutting edge, and the protective layer further includes a second area and a third area; The first region also covers a portion of the polarizer protruding from the first cutting edge toward the surface of the panel; The second region covers the second cutting edge; The third region covers the third cutting edge and a surface of the panel that is protruding from the third cutting edge and faces away from the cover plate.

6. The display module according to claim 5, characterized in that: In a direction parallel to the cover plate, the first area is close to an edge of the opening, the second area is close to an edge of the opening, and the third area is close to an edge of the opening and flush.

7. The display module according to claim 4, characterized in that: In a direction parallel to the cover plate, the second cutting edge protrudes from the first cutting edge, the first cutting edge protrudes from the third cutting edge, a first via hole is provided at a portion of the polarizer protruding from the first cutting edge, the first via hole extends from a surface of the polarizer facing the panel in a direction away from the panel, and the first via hole extends to a maximum extent to a surface of the cover plate facing the panel; The first region may extend to the inside of the first via hole; The protection layer further includes a fourth region, wherein the fourth region covers the third cutting edge and a surface of a portion of the panel protruding from the third cutting edge and facing away from the cover plate.

8. The display module according to claim 4, characterized in that: In a direction parallel to the cover plate, the second cutting edge protrudes from the first cutting edge, and the third cutting edge protrudes from the first cutting edge; A second via hole is formed on a portion of the back film protruding from the first cutting edge, and the second via hole extends from a surface of the back film away from the panel in a direction perpendicular to the cover plate; The first region may extend to the inside of the second via hole; Preferably, the second via hole extends to the maximum extent of the surface of the cover plate facing the panel; Preferably, in a direction parallel to the cover plate, the second cutting edge is flush with the third cutting edge.

9. The display module according to claim 1, characterized in that: The display module further comprises a heat dissipation layer, and the heat dissipation layer is arranged on the backlight side of the panel; Preferably, an orthographic projection of the heat dissipation layer in a direction perpendicular to the cover plate overlaps with an orthographic projection of the protection layer in a direction perpendicular to the cover plate.

10. A display device, characterized in that The display device comprises the display module according to any one of claims 1-9.

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