阅读说明：本技术 复合材及显示装置 (Composite material and display device ) 是由 尹航 于 2020-12-25 设计创作，主要内容包括：本申请实施例公开了一种复合材,应用于一曲面屏中,所述复合材具有中心区以及边缘区,所述边缘区位于所述中心区的边侧,所述复合材包括一基材层,所述基材层对应所述中心区的位置设置有一凹槽,所述凹槽内设置有一缓冲层以及一覆盖所述缓冲层的金属层。将所述缓冲层以及所述金属层设置于所述基材层的所述凹槽内,可以保证所述金属层不设置于在所述边缘区内,提高了所述边缘区的物理耐弯折性能,并且能够大幅度降低所述复合材的所述边缘区在弯折过程中产生叠层间的剥落的风险,消除了所述金属层在大角度贴合时在所述边缘区产生褶皱和印痕的风险,从而提高产品外观和制程的良率。(The embodiment of the application discloses composite material is applied to in a curved screen, composite material has center and marginal zone, the marginal zone is located the avris in center, composite material includes a substrate layer, the substrate layer corresponds the position in center is provided with a recess, be provided with a buffer layer and a cover in the recess the metal level of buffer layer. The buffer layer and the metal layer are arranged in the groove of the base material layer, so that the metal layer is not arranged in the edge region, the physical bending resistance of the edge region is improved, the risk of peeling between the laminated layers generated in the bending process of the edge region of the composite material can be greatly reduced, the risk of generating folds and impressions in the edge region when the metal layer is attached at a large angle is eliminated, and the product appearance and the yield of the manufacturing process are improved.)

1. The composite material is applied to a curved screen and is provided with a central area and edge areas, wherein the edge areas are positioned on the side of the central area, and the composite material is characterized in that: the composite material comprises a substrate layer, a groove is formed in the position, corresponding to the central area, of the substrate layer, and a buffer layer and a metal layer covering the buffer layer are arranged in the groove.

2. The composite of claim 1, wherein: the composite further comprises:

the protective layer is arranged on one side of the base material layer and covers the metal layer and the base material layer positioned in the edge area;

the adhesive layer is arranged on one side of the substrate layer, which is far away from the protective layer;

a release layer arranged on one side of the adhesive layer deviating from the substrate layer.

3. The composite of claim 1, wherein: the sum of the thicknesses of the buffer layer and the metal layer is equal to the depth of the groove.

4. The composite of claim 1, wherein: the buffer layer is a polyimide film.

5. The composite of claim 1, wherein: the metal layer is a copper foil.

6. The composite of claim 1, wherein: the metal layer is alloy copper; the alloy copper is made of metal copper doped with at least one of carbon element, silicon element and nickel element.

7. The composite of claim 2, wherein: the substrate layer is made of foam; the adhesive layer is a grid adhesive tape; the release layer is a composite release film composed of one or more of a PE release film, a PET release film, an OPP release film and a PC release film.

8. The composite of claim 1, wherein: the composite material comprises two edge regions which are respectively positioned on two opposite sides of the central region.

9. The composite of claim 1, wherein: the edge region surrounds the central region.

10. A display device, includes flexible display panel and apron, wherein the apron set up in one side of flexible display panel, its characterized in that: the display device further comprises the composite of claim 1, the composite being disposed on another side of the flexible display panel, the cover plate comprising a planar region and a curved region, the central region of the composite corresponding to the planar region of the cover plate, the edge region of the composite corresponding to the curved region of the cover plate.

Technical Field

The application relates to the technical field of display, in particular to a composite material suitable for a curved screen and a display device adopting the composite material.

Background

The full screen technology is one of the more popular technologies on the mobile phone terminal. Along with the development of the 3D cambered surface glass cover plate technology, the left side and the right side, even the upper side and the lower side of the cover plate glass can be thermally bent into an arc shape, so that better impression and higher screen occupation ratio are brought. Wherein, the four curved surfaces and the inverted display cover plate can well improve the overall appearance of the screen. Due to the special shape of the large-angle cambered surface of the 3D display cover plate, great challenges are brought to the selection and design of the attaching process and materials.

In the OLED screen module laminated material, the composite material is a multilayer material which can play roles of buffering, heat insulation, electromagnetic shielding and the like. The screen can be protected from being damaged to a certain extent, and the screen is an important material for ensuring the stability of the screen under severe environmental conditions. In the prior art, the composite material can be bent at a large angle during 3D (three-dimensional) bonding, so that the composite material is easy to peel off from a laminated layer. Meanwhile, the copper foil layer in the composite material is easy to wrinkle in a large-angle bending state, which can affect the appearance of the product and even the front display effect of the OLED screen.

Therefore, improvement is urgently needed to overcome the defects in the prior art.

Disclosure of Invention

An object of this application is to provide a combined material and display device, when can solving among the prior art combined material laminating on curved surface screen, can produce peeling off or the impression between the stromatolite to influence the positive display effect's of screen problem.

The embodiment of the application provides a composite material, is applied to in a curved screen, composite material has center area and marginal zone, the marginal zone is located the avris in center area, wherein composite material includes a substrate layer, the substrate layer corresponds the position in center area is provided with a recess, be provided with a buffer layer and a cover in the recess the metal level of buffer layer.

Optionally, in some embodiments of the present application, the composite further includes: the protective layer is arranged on one side of the base material layer and covers the metal layer and the base material layer positioned in the edge area; the adhesive layer is arranged on one side of the substrate layer, which is far away from the protective layer; a release layer arranged on one side of the adhesive layer deviating from the substrate layer.

Optionally, in some embodiments of the present application, a sum of thicknesses of the buffer layer and the metal layer is equal to a depth of the groove.

Optionally, in some embodiments of the present application, the buffer layer is a polyimide film.

Optionally, in some embodiments of the present application, the metal layer is a copper foil.

Optionally, in some embodiments of the present application, the metal layer is alloyed copper; the alloy copper is made of metal copper doped with at least one of carbon element, silicon element and nickel element.

Optionally, in some embodiments of the present application, the substrate layer is foam; the adhesive layer is a grid adhesive tape; the release layer is a composite release film composed of one or more of a PE release film, a PET release film, an OPP release film and a PC release film.

Optionally, in some embodiments of the present application, the composite material includes two of the edge regions, which are respectively located at two opposite sides of the central region.

Optionally, in some embodiments of the present application, the edge region surrounds the central region.

Correspondingly, this application embodiment still provides a display device, including flexible display panel and apron, the apron set up in one side of flexible display panel, wherein display device still includes in the above-mentioned embodiment the combined material, the combined material set up in flexible display panel's opposite side, the apron includes plane area and curved surface area, the combined material the central area corresponds the apron the plane area, the combined material the marginal area corresponds the apron curved surface area.

Compared with the prior art, in the embodiment of the application, the substrate layer is provided with a groove at a position corresponding to the central area, and the groove is internally provided with a buffer layer and a metal layer covering the buffer layer. The buffer layer and the metal layer are arranged in the groove of the base material layer, so that the metal layer is not arranged in the edge region, the physical bending resistance of the edge region is improved, the risk of peeling between the laminated layers generated in the bending process of the edge region of the composite material can be greatly reduced, the risk of generating folds and impressions in the edge region when the metal layer is attached at a large angle is eliminated, and the product appearance and the yield of the manufacturing process are improved. Furthermore, the substrate layer can buffer external force, and damage to the display panel caused by bonding pressure in the process of bonding the composite material and the display panel can be prevented; the buffer layer is a polyimide film, so that the metal layer can be further buffered and protected, and the ductility of the composite material is improved; the protective layer can effectively protect the metal layer and prevent the metal layer from being influenced by the external environment, so that the phenomena of oxidation, corrosion and the like are avoided; the adhesive layer is mainly used for attaching the composite material to a display panel and used for enhancing the attaching tightness of the composite material and the display panel; the release layer can protect other film layers of the composite material in the process of storage or transportation.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of the composite material in the examples of the present application;

FIG. 2 is a schematic perspective view of the substrate layer in the embodiment of the present application;

FIG. 3 is a schematic perspective view of another embodiment of the substrate layer;

FIG. 4 is a schematic structural diagram of a display device according to an embodiment of the present application;

FIG. 5 is a schematic view of a structure of the cover plate in the embodiment of the present application;

FIG. 6 is a schematic view of the composite material shown in FIG. 2 corresponding to the cover plate shown in FIG. 5;

FIG. 7 is a schematic view of another structure of the cover plate in the embodiment of the present application;

fig. 8 is a schematic diagram of the corresponding position relationship between the composite material in fig. 3 and the cover plate in fig. 7.

Description of the main reference numerals:

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless otherwise stated, the use of directional terms such as "upper", "lower", "left" and "right" may refer to the actual use or operation of the device, may refer to the drawing direction in the drawings, and may refer to two opposite directions; while "inner" and "outer" are with respect to the outline of the device.

Specifically, referring to fig. 1 to 2, an embodiment of the present application provides a composite 100 applied to a curved panel, where the composite 100 has a central area 101 and an edge area 102, the edge area 102 is located at a side of the central area 101, the composite 100 includes a substrate layer 110, a groove 111 is disposed on the substrate layer 110 at a position corresponding to the central area 101, and a buffer layer 120 and a metal layer 130 covering the buffer layer 120 are disposed in the groove 111. The buffer layer 120 and the metal layer 130 are disposed in the groove 111 of the substrate layer 110, so that the metal layer 130 is not disposed in the edge region 102, the physical bending resistance of the edge region 102 is improved, the risk of peeling between the stacked layers of the edge region 102 of the composite material 100 during bending can be greatly reduced, the risk of wrinkles and impressions generated in the edge region 102 when the metal layer 130 is attached at a large angle is eliminated, and the product appearance and the yield of the manufacturing process are improved.

In the embodiment of the present invention, the sum of the thicknesses of the buffer layer 120 and the metal layer 130 is equal to the depth of the groove 111. The thickness of the buffer layer 120 is a vertical distance between a side of the buffer layer 120 close to the metal layer 130 and a side of the buffer layer 120 far from the metal layer 130; the thickness of the metal layer 130 is a vertical distance between one side of the metal layer 130 close to the buffer layer 120 and one side of the metal layer 130 far from the buffer layer 120; the depth of the groove 111 is the difference between the thickness of the substrate layer 110 in the edge region 102 and the thickness of the substrate layer 110 in the central region 101.

In the embodiment of the present application, the composite material 100 further includes: the protective layer 140 is disposed on one side of the substrate layer 110, and covers the metal layer 130 and the substrate layer 110 located in the edge region 102; the adhesive layer 150 is arranged on one side of the substrate layer 110, which is far away from the protective layer 140; and the release layer 160 is arranged on one side of the adhesive layer 150 departing from the substrate layer 110. The protective layer 140 can effectively protect the metal layer 130, and prevent the metal layer 130 from being affected by the external environment, thereby causing oxidation, corrosion, and the like; the adhesive layer 150 is mainly used for attaching the composite material 100 to a display panel and for enhancing the adhesion tightness between the composite material 100 and the display panel; the release layer 160 is used to protect other film layers of the composite 100 during storage or transportation.

Referring to fig. 2, in an embodiment of the present application, the composite material 100 includes two edge regions 102 respectively located at two opposite sides of the central region 101; the groove 111 of the substrate layer 110 is disposed corresponding to the central region 101, and the groove 111 penetrates through the substrate layer 110 along the longitudinal direction of the substrate layer 110, so that the thickness of the substrate layer 110 in the edge region 102 is greater than the thickness of the substrate layer 110 in the central region 101. The thickness of the substrate layer 110 is a vertical distance between one side of the substrate layer 110 close to the glue layer 150 and one side of the substrate layer 110 far away from the glue layer 150.

Referring to fig. 3, in an embodiment of the present application, the composite material 100 includes a central region 101 and an edge region 102, wherein the edge region 102 is disposed around or surrounding the central region 101; the groove 111 of the substrate layer 110 is disposed corresponding to the central area 101, and the groove 111 does not penetrate through the substrate layer 110 along the longitudinal direction of the substrate layer 110, so that the substrate layer 110 forms a structure of "high all around and low in the middle", that is, the thickness of the substrate layer 110 in the edge area 102 is greater than the thickness of the substrate layer 110 in the central area 101. The thickness of the substrate layer 110 is a vertical distance between one side of the substrate layer 110 close to the glue layer 150 and one side of the substrate layer 110 far away from the glue layer 150.

In the embodiment, the material of the metal layer 130 includes copper, aluminum, and copper alloy. Preferably, the metal layer is a copper foil. The thickness of the metal layer 130 is less than 0.05mm, the metal layer 130 with the thickness meets the thickness requirement of a metal foil, and the metal layer is arranged in the composite material 100 and also can meet the ductility and hardness requirements of the composite material 100, so that the composite material 100 is not curled when being attached to a display panel. And preferably the thickness of the composite 100 is less than 1 mm.

In the embodiment of the application, the material of the copper alloy is metal copper doped with at least one of carbon element, silicon element and nickel element. It is understood by those skilled in the art that the doping of carbon, silicon and nickel in the copper metal can be made by conventional means in the art, and the mass ratio of carbon, silicon and nickel in the copper alloy is not limited, but the hardness of the copper alloy is larger than that of electrolytic copper.

The substrate layer 110 in the embodiment of the present application is preferably foam, for example: the Super Clean Foam (SCF) can buffer external force and prevent the display panel from being damaged by bonding pressure in the bonding process of the composite material 100 and the display panel; the buffer layer 120 is a polyimide film, and can further buffer and protect the metal layer 130, so as to improve the ductility of the composite material 100; the protective layer 140 is a conventional protective material in the art, and is not described in detail herein; the adhesive layer 150 is preferably a mesh tape, and the adhesive surface is printed with longitudinal and transverse cross-hatches by applying pressure through meshes, so that the curling phenomenon caused by shrinkage of the adhesive layer can be prevented, and the adhesion tightness of the composite material 100 and the display panel is enhanced, and the adhesive material of the adhesive layer 150 can be acrylic adhesive or silica gel; the release layer 160 is a composite release film composed of one or more of a PE release film, a PET release film, an OPP release film, and a PC release film, and preferably, the release film 150 is a PE release film.

Specifically, referring to fig. 4 to 8, an embodiment of the present application provides a display device 10, including a flexible display panel 200 and a cover plate 300, wherein the cover plate 300 is disposed on one side of the flexible display panel 200, wherein the display device 10 further includes the composite material 100 according to the above embodiment, the composite material 100 is disposed on the other side of the flexible display panel 200, the cover plate 300 includes a planar area 301 and a curved area 302, the central area 101 of the composite material 100 corresponds to the planar area 301 of the cover plate 300, and the edge area 102 of the composite material 100 corresponds to the curved area 302 of the cover plate 300.

Referring to fig. 5 to 6, in an embodiment of the display device 10 of the present application, the cover plate 300 includes two curved regions 302 respectively located at two sides of the planar region 301; the composite material 100 includes two edge regions 102 respectively located at two opposite side edges of the central region 101; wherein the two edge regions 102 of the composite material 100 are disposed corresponding to the two curved regions 302 of the cover sheet 300, and the central region 101 of the composite material 100 is disposed corresponding to the planar region 301 of the cover sheet 300. The metal layer 130 is divided into three sections, wherein one section has a higher hardness and is disposed corresponding to the central region 101 of the composite material 100, i.e., corresponding to the planar region 301 of the cover plate 300, and the other two sections have a lower hardness and are disposed corresponding to the two edge regions 102 of the composite material 100, i.e., corresponding to the two curved regions 302 of the cover plate 300. It can be understood by those skilled in the art that the cover plate 300 of the present embodiment is a hyperboloid cover plate, and each side of the cover plate 300 is provided with a chamfer, and the size of the chamfer can be adjusted according to specific situations, and is not limited to fig. 5.

Referring to fig. 7 to 8, in an embodiment of the present application, the cover plate 300 includes a planar area 301 and a curved area 302, and the curved area 302 is disposed around the planar area 301; the composite material 100 includes a central region 101 and an edge region 102, wherein the edge region 102 is disposed around the central region 101; wherein the central region 101 of the composite material 100 is disposed corresponding to the planar region 301 of the cap plate 300, and the edge region 302 of the composite material 100 is disposed corresponding to the curved region 102 of the cap plate 300. The metal layer 130 is divided into two parts, one of which is harder and is disposed corresponding to the central region 101 of the composite material 100, i.e., corresponding to the planar region 301 of the cap plate 300, and the other of which is less hard and is disposed corresponding to the edge region 102 of the composite material 100, i.e., corresponding to the curved region 302 of the cap plate 300. It can be understood by those skilled in the art that the cover plate 300 of the present embodiment is a four-curved cover plate.

In the embodiment of the present application, the flexible display panel 200 may be an OLED display panel, an LCD display panel, or a micro-LED display panel, but is not limited thereto, and the present application is not limited thereto. It should be noted that the composite material 100 is required to have the hardness of the metal layer 130 in the curved region of the display device 10 greater than the hardness of the metal layer 130 in the planar region of the display device 10. The display panel of the display device 10 provided in the embodiment of the present application may also be a three-curved-surface display panel or a foldable display panel, for example: when the display panel of the display device 10 is a foldable display panel, the hardness of the metal layer 130 of the composite material 100 in the folding region of the foldable display panel is greater than the hardness of the metal layer 130 in the non-folding region of the foldable display panel.

The display device 10 may be an intelligent mobile terminal device such as a mobile phone, a computer, an intelligent watch, a vehicle-mounted display screen, and the like, which is not limited in the present application.

In the embodiment of the present invention, a groove 111 is disposed at a position of the substrate layer 110 corresponding to the central region 101, and a buffer layer 120 and a metal layer 130 covering the buffer layer 120 are disposed in the groove 111. The buffer layer 120 and the metal layer 130 are disposed in the groove 111 of the substrate layer 110, so that the metal layer 130 is not disposed in the edge region 102, the physical bending resistance of the edge region 102 is improved, the risk of peeling between the stacked layers of the edge region 102 of the composite material 100 during bending can be greatly reduced, the risk of wrinkles and impressions generated in the edge region 102 when the metal layer 130 is attached at a large angle is eliminated, and the product appearance and the yield of the manufacturing process are improved. Further, the substrate layer 110 can buffer external force, and can prevent damage to the display panel caused by bonding pressure in the process of bonding the composite material 100 and the display panel; the buffer layer 120 is a polyimide film, and can further buffer and protect the metal layer 130, so as to improve the ductility of the composite material 100; the protective layer 140 can effectively protect the metal layer 130, and prevent the metal layer 130 from being affected by the external environment, thereby causing oxidation, corrosion, and the like; the adhesive layer 150 is mainly used for attaching the composite material 100 to a display panel and for enhancing the adhesion tightness between the composite material 100 and the display panel; the release layer 160 can protect other film layers of the composite 100 during storage or transportation.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The composite material 100 and the display device 10 provided in the embodiments of the present application are described in detail above, and the principles and embodiments of the present application are described herein by applying specific examples, and the description of the embodiments is only used to help understand the method and the core concept of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.