WO2022052219A1 - 复合膜层及显示装置 - Google Patents

复合膜层及显示装置 Download PDF

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Publication number
WO2022052219A1
WO2022052219A1 PCT/CN2020/122198 CN2020122198W WO2022052219A1 WO 2022052219 A1 WO2022052219 A1 WO 2022052219A1 CN 2020122198 W CN2020122198 W CN 2020122198W WO 2022052219 A1 WO2022052219 A1 WO 2022052219A1
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WIPO (PCT)
Prior art keywords
protective layer
layer
composite film
body portion
display device
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Application number
PCT/CN2020/122198
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English (en)
French (fr)
Inventor
饶娉
蒋聪聪
Original Assignee
武汉华星光电半导体显示技术有限公司
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Publication of WO2022052219A1 publication Critical patent/WO2022052219A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/06—Interconnection of layers permitting easy separation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED

Definitions

  • the present application relates to the field of display technology, and in particular, to a composite film layer and a display device.
  • the embodiments of the present application provide a composite film layer and a display device, which can prevent the composite film layer from being scratched.
  • the embodiment of the present application provides a composite film layer, which includes:
  • a buffer layer arranged below the release film
  • a first protective layer disposed below the metal layer
  • the second protective layer is arranged below the first protective layer; the second protective layer covers the first protective layer; the adhesive force between the second protective layer and the first protective layer is less than The adhesion between the first protective layer and the metal layer.
  • the present invention also provides a display device comprising the above-mentioned composite film layer and a flexible display screen, wherein the composite film layer is provided on the inner side of the flexible display screen.
  • the composite film layer and the display device include a release film; a buffer layer, arranged below the release film; an adhesive layer, arranged below the buffer layer; and a metal layer, arranged on the below the adhesive layer; the first protective layer is arranged below the metal layer; the second protective layer is arranged below the first protective layer; the second protective layer covers the first protective layer; The adhesive force between the second protective layer and the first protective layer is smaller than the adhesive force between the first protective layer and the metal layer; The protective layer is torn off together with the light guide film, but the first protective layer is not torn off, so that scratches on the composite film can be avoided.
  • FIG. 1 is a schematic cross-sectional view of a conventional display screen.
  • FIG. 2 is a process flow diagram of the existing composite film layer lamination.
  • FIG. 3 is a schematic cross-sectional view of a conventional light guide film.
  • FIG. 4 is a schematic cross-sectional view of a composite film layer provided by an embodiment of the present application.
  • FIG. 5 is a stacking diagram of a composite film layer provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a metal layer according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a second protective layer provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a second protective layer according to another embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a display device according to an embodiment of the present application.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features.
  • features defined as “first”, “second” may expressly or implicitly include one or more of said features.
  • a first feature "on” or “under” a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them.
  • the first feature being “above”, “over” and “above” the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature is “below”, “below” and “below” the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.
  • the display panel 30 is attached to the cover plate 10 through the optical adhesive 14 , and as shown in FIG.
  • the film layer 20 plays a role of buffering and support.
  • the light guide film 16 (Guide-flim) needs to be bonded at both ends of the composite film layer 20.
  • the display panel 30 is attached to the lamination area of the light guide film 16, and then the pins are attached.
  • the positioning hole is pulled down to make the middle of the composite film layer 20 fit first, and then the pad (PAD) 15 is used to expand to make the two sides fit.
  • the viscosity of the protective layer is not as high as that of the light guide film 16 , so the protective layer is torn off together, so that the composite film layer 20 cannot be protected.
  • the light guide film 16 includes a first release film 161 , a photosensitive adhesive layer 162 and a second release film 163 .
  • the first release film 161 is provided with a positioning hole 164 , and the positioning hole 164 is used for Install the locator.
  • FIG. 4 is a schematic cross-sectional view of a composite film layer provided by an embodiment of the present application.
  • the composite film layer 40 in this embodiment includes: a release film 41 , a buffer layer 42 , an adhesive layer 43 , a metal layer 44 , a first protective layer 45 and a second protective layer 46 .
  • the material of the release film 41 may include polyethylene terephthalate.
  • the buffer layer 42 is disposed under the release film 41 ; the material of the buffer layer 42 includes but is not limited to sponge rubber.
  • the buffer layer 42 may include a second body portion and at least one extension portion, and the specific structure of the buffer layer 42 may be the same as that of FIG. 6 .
  • the adhesive layer 43 is disposed under the buffer layer 42 , and the material of the adhesive layer 43 may be photosensitive adhesive.
  • the metal layer 44 is disposed under the adhesive layer 43; the material of the metal layer 44 may include but not limited to copper.
  • the metal layer 44 includes a second body portion 441 and a plurality of extension portions 442. It is understood that the number of the extension portions 442 is not limited to this, and may be one, two or more than two. When the metal layer 44 includes a plurality of extension parts 442, two adjacent extension parts 442 are arranged at intervals.
  • the width of the extension portion 442 is smaller than the width of the second body portion 441 , that is, the area of the extension portion 442 is smaller than the area of the second body portion 441 .
  • the first protective layer 45 is disposed under the metal layer 44 ; the material shell of the first protective layer 45 is polyimide or polymethyl methacrylate.
  • the second protective layer 46 is disposed under the first protective layer 45 ; the second protective layer 46 covers the first protective layer 45 ; between the second protective layer 46 and the first protective layer 45
  • the adhesive force is smaller than the adhesive force between the first protective layer 45 and the metal layer 44 .
  • the area of the second protective layer 46 is larger than that of the first protective layer 45 .
  • the second protective layer 46 includes a first body portion 461 and a peripheral portion 462 ; the peripheral portion 462 surrounds the outside of the first body portion 461 ; the peripheral portion The portion 462 is attached to the extension portion of the metal layer or the extension portion of the buffer layer.
  • the area of the first body portion 461 is greater than or equal to the area of the first protective layer 45 .
  • first body portion 461 and the first protective layer 45 are not bonded together. In another embodiment, the first body portion 461 and the first protective layer 45 are bonded by an adhesive layer, but the adhesive force of the adhesive layer is smaller than that between the first protective layer 45 and the metal layer 44 adhesive force.
  • the material of the second protective layer 46 may be a transparent material.
  • the material of the second protective layer 46 may be polyimide or polymethyl methacrylate.
  • the thickness of the second protective layer 46 is smaller than the thickness of the first protective layer 45 .
  • the second protective layer 46 includes a first body portion 461 and at least one fixing portion 463 ; the fixing portion 463 is connected to the extension portion of the metal layer or the buffer layer. Extensions fit.
  • the second protective layer 46 includes a plurality of fixing portions 463 , and two adjacent fixing portions 463 are arranged at intervals.
  • the area of the fixing portion 463 may be smaller than that of the first body portion 461 .
  • the number of the fixing parts 463 may be one, two or more.
  • the lamination process of the composite film layer in this embodiment is roughly the same as the steps in the prior art, the difference is that when the light guide film is torn off in this embodiment, the second protective layer is torn off together with the light guide film, And the first protective layer is not torn off.
  • the adhesive force between the second protective layer and the first protective layer is smaller than the adhesive force between the first protective layer and the metal layer, when the light guide film is torn off, due to the The viscosity of the second protective layer and the light guide film is relatively large, so that the second protective layer and the light guide film are torn off together, but the first protective layer will not be torn off, thereby preventing the composite film from being scratched.
  • FIG. 9 is a schematic structural diagram of a display device according to an embodiment of the present application.
  • the display device 100 includes the above-mentioned composite film layer 40 and the flexible display screen 101.
  • the composite film layer 40 is arranged on the inner side of the flexible display screen 101, and the inner side is on the same side as the non-display surface of the flexible display screen 101.
  • the flexible display screen 101 can be The cover plate 10 and the display panel 30 are included.
  • the display device 100 further includes a light guide film 16. When both the composite film 40 and the flexible display screen 101 are in a bent state, the light guide film 16 and the second protective layer are respectively formed. Both ends of the second protective layer 46 are pasted together, that is, the light guide film 16 is pasted on both ends of the second protective layer 46 .
  • the adhesive force between the second protective layer and the first protective layer is smaller than the adhesive force between the first protective layer and the metal layer, when the light guide film is torn off, due to the The viscosity of the second protective layer and the light guide film is relatively large, so that the second protective layer and the light guide film are torn off together, but the first protective layer will not be torn off, so that scratches on the composite film can be avoided, thereby improving the The product yield of the display device is improved.
  • the display device may further include a camera, a Bluetooth module, and the like, which will not be repeated here.
  • the display devices include but are not limited to mobile phones, tablet computers, computer monitors, game consoles, televisions, wearable devices, and other household appliances or household appliances with display functions.
  • the composite film layer and the display device include a release film; a buffer layer, arranged below the release film; an adhesive layer, arranged below the buffer layer; and a metal layer, arranged on the below the adhesive layer; the first protective layer is arranged below the metal layer; the second protective layer is arranged below the first protective layer; the second protective layer covers the first protective layer; The adhesive force between the second protective layer and the first protective layer is smaller than the adhesive force between the first protective layer and the metal layer; The protective layer and the light guide film are torn off together, but the first protective layer is not torn off, so that scratches on the composite film layer can be avoided, thereby improving the product yield of the display device.

Abstract

一种复合膜层（40）及显示装置（100），其中，复合膜层（40）依次包括：离型膜（41）、缓冲层（42）、粘接层（43）、金属层（44）、第一保护层（45）以及第二保护层（46）；第二保护层（46）覆盖第一保护层（45）；第二保护层（46）与第一保护层（45）之间的粘结力小于第一保护层（45）与金属层（44）之间的粘结力。

Description

复合膜层及显示装置 技术领域
本申请涉及显示技术领域，具体涉及一种复合膜层及显示装置。
 背景技术
曲面显示屏在贴合盖板后，通常需要进行复合膜层（SCF）的贴合，目前在曲面区域贴合复合膜层，需要在导光膜的辅助下才能进行贴合。
 技术问题
但是由于在去除导光膜的时候会将保护层撕除，从而容易使复合膜层出现划伤。
 技术解决方案
本申请实施例提供一种复合膜层及显示装置，可以避免复合膜层出现划伤。
本申请实施例提供一种复合膜层，其包括：
离型膜；
缓冲层，设于所述离型膜的下方；
粘接层，设于所述缓冲层的下方；
金属层，设于所述粘接层的下方；
第一保护层，设于所述金属层的下方；
第二保护层，设于所述第一保护层的下方；所述第二保护层覆盖所述第一保护层；所述第二保护层与所述第一保护层之间的粘结力小于所述第一保护层与所述金属层之间的粘结力。
本发明还提供一种显示装置，其包括上述复合膜层和柔性显示屏，所述复合膜层设于所述柔性显示屏的内侧。
 有益效果
本申请实施例的复合膜层及显示装置，包括离型膜；缓冲层，设于所述离型膜的下方；粘接层，设于所述缓冲层的下方；金属层，设于所述粘接层的下方；第一保护层，设于所述金属层的下方；第二保护层，设于所述第一保护层的下方；所述第二保护层覆盖所述第一保护层；所述第二保护层与所述第一保护层之间的粘结力小于所述第一保护层与所述金属层之间的粘结力；因此在撕除导光膜时，使得第二保护层与导光膜一同被撕下来，但不会将第一保护层撕除，从而可以避免复合膜层出现划伤。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为现有显示屏的剖面示意图。
图2为现有复合膜层的贴合的工艺流程图。
图3为现有导光膜的剖面示意图。
图4为本申请一实施例提供的复合膜层的剖面示意图。
图5为本申请一实施例提供的复合膜层的层叠图。
图6为本申请一实施例提供的金属层的结构示意图。
图7为本申请一实施例提供的第二保护层的结构示意图。
图8为本申请另一实施例提供的第二保护层的结构示意图。
图9为本申请一实施例提供的显示装置的结构示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
如图1所示，显示面板30通过光学胶14与盖板10贴合，如图2所示，当盖板10和显示面板30均处于弯曲状态时，需要在显示面板30的内侧贴合复合膜层20，以起到缓冲和支撑作用。通常在贴合过程中，需要在复合膜层20的两端粘结导光膜16（Guide-flim），贴合时会将显示面板30贴在导光膜16的贴合区域，再将销定位孔向下拉，使复合膜层20的中间先贴合，然后利用垫片(PAD)15膨胀使两边贴合，完成后通过紫外线照射，以便撕除导光膜16，但是由于复合膜层20的保护层的黏性没有导光膜16的黏性大，因此导致保护层一同被撕下来，导致复合膜层20无法受到保护。
如图3所示，导光膜16包括第一离型膜161、光敏胶层162以及第二离型膜163，所述第一离型膜161上设置有定位孔164，定位孔164用于安装定位件。
请参阅图4至图7，图4为本申请一实施例提供的复合膜层的剖面示意图。
如图4和图5所示，本实施例的复合膜层40包括：离型膜41、缓冲层42、粘接层43、金属层44、第一保护层45以及第二保护层46。
离型膜41的材料可包括聚对苯二甲酸乙二醇醋。
缓冲层42设于所述离型膜41的下方；所述缓冲层42的材料包括但不限于海绵橡胶。在一实施方式中，所述缓冲层42可包括第二本体部和至少一延伸部，缓冲层42的具体结构可与图6的结构相同。
粘接层43设于所述缓冲层42的下方，该粘接层43的材料可为光敏胶。
金属层44设于所述粘接层43的下方；所述金属层44的材料可包括但不限于铜。在一实施方式中，如图6所示，所述金属层44包括第二本体部441和多个延伸部442，可以理解的该延伸部442的数量不限于此，可以为一个、两个或者两个以上。当金属层44包括多个延伸部442时，相邻两个延伸部442之间间隔设置。优选地，延伸部442的宽度小于第二本体部441的宽度，也即延伸部442的面积小于第二本体部441的面积。
第一保护层45设于所述金属层44的下方；所述第一保护层45的材料壳为聚酰亚胺或者聚甲基丙烯酸甲酯。
第二保护层46设于所述第一保护层45的下方；所述第二保护层46覆盖所述第一保护层45；所述第二保护层46与所述第一保护层45之间的粘结力小于所述第一保护层45与所述金属层44之间的粘结力。在一实施方式中，所述第二保护层46的面积大于所述第一保护层45的面积。在一实施例中，如图7所示，所述第二保护层46包括第一本体部461和周缘部462；所述周缘部462环绕在所述第一本体部461的外侧；所述周缘部462与所述金属层的延伸部或者缓冲层的延伸部贴合。为了进一步防止复合膜层受损，所述第一本体部461的面积大于或等于所述第一保护层45的面积。
在一实施方式中，所述第一本体部461与所述第一保护层45之间未贴合。在另一实施方式中，所述第一本体部461与所述第一保护层45之间通过胶层贴合，但该胶层的粘结力小于第一保护层45与金属层44之间的粘结力。
在一实施方式中，所述第二保护层46的材料可为透明材料。比如所述第二保护层46的材料可为聚酰亚胺或者聚甲基丙烯酸甲酯。
在一实施方式中，为了减小复合膜层的整体厚度，所述第二保护层46的厚度小于所述第一保护层45的厚度。
在其他实施例中，如图8所示，在所述第二保护层46包括第一本体部461和至少一个固定部463；所述固定部463与所述金属层的延伸部或者缓冲层的延伸部贴合。在一实施方式中，所述第二保护层46包括多个固定部463，相邻两个固定部463之间间隔设置。优选地，固定部463的面积可小于第一本体部461的面积。固定部463的数量可为一个、两个或者两个以上。
本实施例的复合膜层的贴合过程与现有技术的步骤大致相同，不同之处在于：本实施例在撕除导光膜时，使得第二保护层与导光膜一同被撕下来，而第一保护层未被撕除。
由于所述第二保护层与所述第一保护层之间的粘结力小于所述第一保护层与所述金属层之间的粘结力，因此在撕除导光膜时，由于第二保护层与导光膜的黏性较大，使得第二保护层与导光膜一同被撕下来，但不会将第一保护层撕除，从而可以避免复合膜层出现划伤。
请参阅图9，图9为本申请一实施例提供的显示装置的结构示意图。
其中，显示装置100包括上述复合膜层40以及柔性显示屏101，所述复合膜层40设于柔性显示屏101的内侧，内侧与柔性显示屏101的非显示面同侧，柔性显示屏101可包括盖板10和显示面板30。在一实施方式中，所述显示装置100还包括导光膜16，当所述复合膜40和柔性显示屏101均处于弯折状态时，所述导光膜16分别与所述第二保护层46的两端贴合，也即在第二保护层46的两端贴合有导光膜16。
由于所述第二保护层与所述第一保护层之间的粘结力小于所述第一保护层与所述金属层之间的粘结力，因此在撕除导光膜时，由于第二保护层与导光膜的黏性较大，使得第二保护层与导光膜一同被撕下来，但不会将第一保护层撕除，从而可以避免复合膜层出现划伤，进而提高了显示装置的产品良率。
尽管未示出，显示装置还可以包括摄像头、蓝牙模块等，在此不再赘述。
所述显示装置包括但不限定于手机、平板电脑、计算机显示器、游戏机、电视机、可穿戴设备及其他具有显示功能的生活电器或家用电器等。
本申请实施例的复合膜层及显示装置，包括离型膜；缓冲层，设于所述离型膜的下方；粘接层，设于所述缓冲层的下方；金属层，设于所述粘接层的下方；第一保护层，设于所述金属层的下方；第二保护层，设于所述第一保护层的下方；所述第二保护层覆盖所述第一保护层；所述第二保护层与所述第一保护层之间的粘结力小于所述第一保护层与所述金属层之间的粘结力；因此在撕除导光膜时，使得第二保护层与导光膜一同被撕下来，但不会将第一保护层撕除，从而可以避免复合膜层出现划伤，进而提高了显示装置的产品良率。
以上对本申请实施例提供的复合膜层及显示装置进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请。同时，对于本领域的技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种复合膜层，其包括：
    离型膜；
    缓冲层，设于所述离型膜的下方；
    粘接层，设于所述缓冲层的下方；
    金属层，设于所述粘接层的下方；
    第一保护层，设于所述金属层的下方；以及
    第二保护层，设于所述第一保护层的下方；所述第二保护层覆盖所述第一保护层；所述第二保护层与所述第一保护层之间的粘结力小于所述第一保护层与所述金属层之间的粘结力。
  2. 根据权利要求1所述的复合膜层，其中
    所述第二保护层的面积大于所述第一保护层的面积。
  3. 根据权利要求1所述的复合膜层，其中
    所述第二保护层包括第一本体部和至少一个固定部；
    所述金属层包括第二本体部和至少一延伸部或者所述缓冲层包括第二本体部和至少一延伸部，所述延伸部与所述固定部贴合。
  4. 根据权利要求3所述的复合膜层，其中
    所述第二保护层包括多个固定部，相邻两个固定部之间间隔设置。
  5. 根据权利要求3所述的复合膜层，其中
    所述第一本体部的面积大于或等于所述第一保护层的面积。
  6. 根据权利要求3所述的复合膜层，其中
    所述第一本体部与所述第一保护层之间未贴合。
  7. 根据权利要求1所述的复合膜层，其中
    所述第二保护层包括第一本体部和周缘部；所述周缘部环绕在所述第一本体部的外侧；
    所述金属层包括第二本体部和至少一延伸部或者所述缓冲层包括第二本体部和至少一延伸部，所述延伸部与所述周缘部贴合。
  8. 根据权利要求5所述的复合膜层，其中
    所述第一本体部的面积大于或等于所述第一保护层的面积。
  9. 根据权利要求5所述的复合膜层，其中
    所述第一本体部与所述第一保护层之间未贴合。
  10. 根据权利要求1所述的复合膜层，其中所述第二保护层的材料为聚酰亚胺或者聚甲基丙烯酸甲酯。
  11. 一种显示装置，其包括复合膜层和柔性显示屏，所述复合膜层设于所述柔性显示屏的内侧；所述复合膜层包括：
    离型膜；
    缓冲层，设于所述离型膜的下方；
    粘接层，设于所述缓冲层的下方；
    金属层，设于所述粘接层的下方；
    第一保护层，设于所述金属层的下方；以及
    第二保护层，设于所述第一保护层的下方；所述第二保护层覆盖所述第一保护层；所述第二保护层与所述第一保护层之间的粘结力小于所述第一保护层与所述金属层之间的粘结力。
  12. 根据权利要求11所述的显示装置，其中
    所述第二保护层的面积大于所述第一保护层的面积。
  13. 根据权利要求11所述的显示装置，其中
    所述第二保护层包括第一本体部和至少一个固定部；
    所述金属层包括第二本体部和至少一延伸部或者所述缓冲层包括第二本体部和至少一延伸部，所述延伸部与所述固定部贴合。
  14. 根据权利要求13所述的显示装置，其中
    所述第二保护层包括多个固定部，相邻两个固定部之间间隔设置。
  15. 根据权利要求11所述的显示装置，其中
    所述第二保护层包括第一本体部和周缘部；所述周缘部环绕在所述第一本体部的外侧；
    所述金属层包括第二本体部和至少一延伸部或者所述缓冲层包括第二本体部和至少一延伸部，所述延伸部与所述周缘部贴合。
  16. 根据权利要求15所述的显示装置，其中
    所述第一本体部的面积大于或等于所述第一保护层的面积。
  17. 根据权利要求15所述的显示装置，其中
    所述第一本体部与所述第一保护层之间未贴合。
  18. 根据权利要求15所述的显示装置，其中
    所述第一本体部的面积大于或等于所述第一保护层的面积。
  19. 根据权利要求15所述的显示装置，其中
    所述第一本体部与所述第一保护层之间未贴合。
  20. 根据权利要求11所述的显示装置，其还包括导光膜，当所述柔性显示屏和所述复合膜均处于弯折状态时，所述导光膜分别与所述第二保护层的两端贴合。
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