WO2019228342A1 - 柔性显示装置和异形双面胶带 - Google Patents

柔性显示装置和异形双面胶带 Download PDF

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Publication number
WO2019228342A1
WO2019228342A1 PCT/CN2019/088789 CN2019088789W WO2019228342A1 WO 2019228342 A1 WO2019228342 A1 WO 2019228342A1 CN 2019088789 W CN2019088789 W CN 2019088789W WO 2019228342 A1 WO2019228342 A1 WO 2019228342A1
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WO
WIPO (PCT)
Prior art keywords
layer
substrate
display device
flexible display
glue layer
Prior art date
Application number
PCT/CN2019/088789
Other languages
English (en)
French (fr)
Inventor
卜德军
蔡宝鸣
李建伟
Original Assignee
京东方科技集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/622,563 priority Critical patent/US11263930B2/en
Publication of WO2019228342A1 publication Critical patent/WO2019228342A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
    • H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
    • H04M1/0214—Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133305—Flexible substrates, e.g. plastics, organic film
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
    • H04M1/0268—Details of the structure or mounting of specific components for a display module assembly including a flexible display panel
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/18—Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment
    • H04M1/185—Improving the rigidity of the casing or resistance to shocks

Definitions

  • the present disclosure belongs to the field of display technology, and particularly relates to a flexible display device and a special-shaped double-sided tape.
  • the flexible display device may include a first substrate, a second substrate facing each other, and a display panel disposed between the first substrate and the second substrate. Since the flexible display device is repeatedly bent during use, this may cause the first substrate and the second substrate to be separated from each other, thereby reducing the reliability and service life of the flexible display device. Therefore, it is desirable to provide an adhesive tape capable of reliably bonding (or connecting) the first substrate and the second substrate of the flexible display device together, and to provide a flexible display device with high reliability and long service life.
  • Embodiments of the present disclosure provide a flexible display device and a special-shaped double-sided tape.
  • An aspect of the present disclosure provides a flexible display device configured to be bendable along at least one bending axis, and the flexible display device has two on both ends of the bending axis. Opposite sides; the flexible display device includes:
  • a special-shaped double-sided adhesive tape that bonds the first substrate and the second substrate to each other at at least one of the two opposite sides, wherein the special-shaped double-sided adhesive tape includes A lower glue layer, a substrate layer and a glue layer, the first substrate and the substrate layer are bonded by the glue layer, and the second substrate and the substrate layer are bonded by the glue layer End; and
  • the upper adhesive layer has a non-overlapping non-overlapping layer.
  • Overlapping areas, and / or, the lower glue layer has non-overlapping areas that do not overlap the upper glue layer.
  • the size of the upper glue layer and the lower glue layer are smaller than the size of the substrate layer, and the upper glue layer and the lower glue
  • the size of the overlapping area of the layers is smaller than the smaller one of the size of the upper glue layer and the size of the lower glue layer.
  • a size of an overlapping area of the upper glue layer and the lower glue layer is smaller than 1/3 of a size of the substrate layer.
  • the first substrate and the second substrate are connected by the shaped double-sided tape.
  • the upper adhesive layer is closer to the middle of the flexible display device than the lower adhesive layer; and / or
  • the upper adhesive layer is farther away from the middle of the flexible display device than the lower adhesive layer.
  • a display area of the flexible display device is rectangular, and the flexible display device has only one bending axis.
  • At least one of two side surfaces on both ends of the bending axis, at least a part of an edge portion of the first substrate and the second substrate is bonded by a uniform-shaped double-sided tape.
  • the uniformly shaped double-sided adhesive tape includes a second lower adhesive layer, a second substrate layer, and a second upper adhesive layer that are sequentially stacked together, and the first substrate and the second substrate layer pass through the first Two lower glue layers are bonded, and the second substrate and the second substrate layer are bonded through the second glue layer; and
  • the size of the second upper glue layer, the second base material layer and the second lower glue layer are the same.
  • the flexible display device further includes a display component, and the display component is disposed between the first substrate and the second substrate.
  • the display member is formed on the first substrate.
  • the display component is connected to the second substrate through an optical glue.
  • the display component includes any one of a display panel, a display touch panel, and a combination of a display panel and a touch panel.
  • the second substrate is a cover plate
  • the first substrate is a middle frame
  • Another aspect of the present disclosure provides a special-shaped double-sided adhesive tape, which includes a lower adhesive layer, a substrate layer, and an upper adhesive layer that are sequentially stacked together, wherein,
  • the upper adhesive layer has a non-overlapping region that does not overlap the lower adhesive layer.
  • the lower glue layer has a non-overlapping area which does not overlap with the upper glue layer.
  • the size of the upper glue layer and the lower glue layer are smaller than the size of the substrate layer, and the upper glue layer and the lower glue
  • the size of the overlapping area of the layers is smaller than the smaller one of the size of the upper glue layer and the size of the lower glue layer.
  • a size of an overlapping area of the upper glue layer and the lower glue layer is smaller than 1/3 of a size of the substrate layer.
  • the substrate layer is made of a flexible material.
  • the substrate layer is made of at least one of polyethylene terephthalate, polyethylene naphthalate, cycloolefin polymer, polyimide, and polycarbonate. to make.
  • each of the upper and lower gum layers is made of at least one of acrylic, silicone-based resin, polyurethane, and epoxy resin.
  • FIG. 1 is a schematic structural diagram of a flexible display device according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a flexible display device according to an embodiment of the present disclosure
  • FIG. 3 is a schematic structural diagram of a flexible display device according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a flexible display device according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of a flexible display device according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a flexible display device according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic diagram of bending of a flexible display device according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic diagram of bending of a flexible display device according to an embodiment of the present disclosure.
  • the flexible display device is configured to be bendable along at least one bending axis D1, and the flexible display device has two opposite sides S1 and S2 on both ends of the bending axis D1. .
  • the flexible display device further includes two opposite sides S3 and S4 in a direction perpendicular to the bending axis D1.
  • the left part of FIG. 7 shows a state in which the flexible display device is not bent. At this time, the flexible display device may have a larger display screen.
  • a part (for example, the lower half) of the flexible display device shown in the left part of FIG. 7 is fixed and the user applies to another part (for example, the upper half) of the flexible display device as shown by the curved double arrow in FIG. 7.
  • the other part can be rotated clockwise from 0 to 180 degrees or counterclockwise from 0 to 180 degrees about the bending axis D1.
  • the middle part of FIG. 7 shows a case where the other part rotates 90 degrees clockwise about the bending axis D1
  • the right part of FIG. 7 shows the other part rotates clockwise about the bending axis D1 180 degree case.
  • embodiments of the present disclosure provide an adhesive tape capable of reliably bonding (or connecting) a first substrate and a second substrate of a flexible display device together, and provide a flexible display device with high reliability and long service life.
  • an embodiment of the present disclosure provides a flexible display device.
  • the flexible display device includes a first substrate 10 and a second substrate 20 opposite to each other, and a uniformly shaped double-sided adhesive tape that bonds edges of the first substrate 10 and the second substrate 20 together.
  • the uniform-shaped double-sided adhesive tape includes a lower adhesive layer 33, a substrate layer 31, and an upper adhesive layer 32, which are sequentially stacked together. In the stacking direction of the lower glue layer 33, the base material layer 31, and the upper glue layer 32 (that is, as shown in FIG.
  • the size of the glue layer 33, the base material layer 31, and the size layer 32 are the same (that is, they have a "uniform shape").
  • the lower glue layer 33, the substrate layer 31, and the upper glue layer 32 completely overlap each other. That is, the upper glue layer 32, the base material layer 31, and the lower glue layer 33 are aligned in the extending direction of the bending axis D1.
  • the uniformly shaped double-sided tape can reliably bond the first substrate and the second substrate together, thereby extending the life of the flexible display device.
  • the manufacturing process of the uniformly shaped double-sided tape is simple.
  • FIG. 1 shows that the left and right sides S1 and S2 of the first and second substrates 10 and 20 are provided with a uniformly shaped double-sided tape, respectively.
  • the left side S1, the right side S2, the upper side S3, and the lower side S4 of the first substrate 10 and the second substrate 20 shown in the left part of FIGS. 1 and 7 may be provided with the uniform shape
  • the double-sided tape forms a closed space between the first substrate 10 and the second substrate 20.
  • a display component is provided in this closed space.
  • the stacked structure of the display component and the peripheral structure of the display component are shown in FIG. 1.
  • optical glue or optical transparent glue, OCA
  • circular polarizer 42 circular polarizer 42
  • a touch panel (TSP) 43 an optical adhesive 41, a thin film encapsulation layer 44, a light emitting device layer 45, a driving transistor layer 46, a flexible substrate layer 47, a support film 48, and a heat dissipation component 50.
  • the display panel may include a thin film encapsulation layer 44, a light emitting device layer 45, a driving transistor layer 46, and a flexible substrate layer 47.
  • the uniformly shaped double-sided tape When the side of the flexible display device (for example, the side S3) receives a force as shown by a curved double arrow in the middle portion of the flexible display device to cause bending, the uniformly shaped double-sided tape simultaneously bears the thickness direction of the flexible display device. Tensile stress and shear stress in the direction of extension along the bending axis D1. Since the respective portions of the uniform-shaped double-sided tape in the thickness direction have the same size, it is not easy to undergo corresponding deformation to relieve the tensile stress and the shear stress. As a result, the first substrate 10 or the second substrate 20 may crack with the uniformly shaped double-sided tape.
  • an embodiment of the present disclosure provides a flexible display device.
  • the flexible display device is configured to be bendable along at least one bending axis D1, and the flexible display device has two opposite sides S1, S2 on both ends of the bending axis D1.
  • the flexible display device includes a first substrate 10 and a second substrate 20 opposite to each other; and a shaped double-sided tape that applies the first substrate 10 and the second substrate at at least one of the two opposite sides S1 and S2.
  • the edge portions of 20 are bonded (or connected) to each other.
  • the special-shaped double-sided adhesive tape includes a lower adhesive layer 33, a substrate layer 31, and an upper adhesive layer 32 which are sequentially stacked.
  • the first substrate 10 and the substrate layer 31 are bonded through the lower adhesive layer 33, and the second substrate 20 and the substrate layer 31 are bonded through the upper adhesive layer 32.
  • the upper adhesive layer 32 has The non-overlapping area that does not overlap with the lower glue layer 33 and / or the non-overlapping area that does not overlap with the upper glue layer 32.
  • the adhesive layer is applied in a direction perpendicular to the bending axis D1 (that is, a stacking direction of the lower adhesive layer 33, the base material layer 31, and the upper adhesive layer 32 of the profiled double-sided tape).
  • a part of 32 does not overlap the lower glue layer 33 and / or a part of the lower glue layer 33 does not overlap the upper glue layer 32. That is, in the extending direction of the bending axis D1, the lower adhesive layer 33, the base material layer 31, and the upper adhesive layer 32 have different sizes, so the double-sided adhesive tapes formed by them are "shaped".
  • the first substrate 10 is a medium frame
  • the second substrate 20 is a cover film, for example.
  • the middle frame may be a frame located between a cover plate and a bottom plate of the flexible display device.
  • the cover is, for example, a flexible cover without a touch function or a flexible cover with a touch function.
  • the base material layer 31 is formed of a material having a good bending property (i.e., a flexible material), for example, a polyethylene terephthalate (PET), a polyethylene naphthalate (PEN), a ring One or more of olefin polymer (COP), polyimide (PI), and polycarbonate (PC).
  • the substrate layer 31 is formed of polyimide (PI).
  • Each of the upper and lower adhesive layers 32 and 33 is made of, for example, at least one of acrylic, silicone-based resin, polyurethane, and epoxy resin.
  • the middle area of the flexible display device can “bump” upward due to the force, and the middle area is “higher” than the left and right sides; or the flexible display The middle area of the device can be “recessed” downward due to the force, and the middle area is “lower” than the left and right sides.
  • the upper glue layer 32 and the lower glue layer 33 are respectively adhered to the base material layer 33, they should not "beyond" the boundary of the base material layer 33 in the extending direction of the bending axis D1.
  • At least one adhesive layer may have another adhesive layer (the upper adhesive layer in FIG. 2).
  • the overlapping portion ie, the right portion of the lower glue layer 33 of FIG. 2).
  • the upper glue layer 32 and the lower glue layer 33 are respectively disposed on two ends of the base material layer 31 in the extending direction of the bending axis D1, and one glue layer is not provided on the other glue layer.
  • the middle region so that there is a non-overlapping region at both ends of the other adhesive layer.
  • the upper glue layer 32 is provided on the upper surface of the base material layer 31
  • the lower glue layer 33 is provided on the lower surface of the base material layer 31
  • the upper glue layer 32 and the lower glue layer 33 are opposite to the base material layer 31, respectively.
  • the size of the upper adhesive layer 32 is smaller than that of the substrate layer 31, and the size of the lower adhesive layer 33 may be equal to the substrate layer. 31 size.
  • the adhesive layer 32 of the left-hand shaped double-sided tape is located on the left side of the base layer 31 of the shaped double-sided tape, and the adhesive layer 32 of the shaped double-sided tape on the right is located on the shaped double-sided tape.
  • the lower glue layer 33 has a non-overlapping area that does not overlap with the upper glue layer 32 (ie, a right portion of the lower glue layer 33 that does not overlap with the upper glue layer 32 in the vertical direction).
  • the two shaped double-sided adhesive tapes at the left and right sides of the flexible display device are symmetrical about a vertical center axis of the flexible display device.
  • the embodiments of the present disclosure are not limited thereto.
  • the two shaped double-sided adhesive tapes at the left and right sides of the flexible display device are not about the vertical center axis of the flexible display device. symmetry.
  • the sizes of the upper adhesive layer 32 and the lower adhesive layer 33 are smaller than the substrate.
  • the size of the layer 31, the size of the overlapping area of the upper glue layer 32 and the lower glue layer 33 is smaller than the smaller one of the size of the upper glue layer 32 and the size of the lower glue layer 33. That is, the upper glue layer 32 and the lower glue layer 33 are “left and right staggered”.
  • the above-mentioned various shaped double-sided tapes shown in FIG. 2 to FIG. 6 can be obtained by cutting the upper adhesive layer 32 and / or the lower adhesive layer 33 of the uniform-shaped double-sided tape shown in FIG. 1.
  • the adhesive layer with the removed portion is in the extension direction of the bending axis D1 It is easier to "slip" (that is, corresponding deformation occurs), and makes the adhesive layer with the removed portion undergo less tensile stress in the thickness direction of the flexible display device. This helps to reduce or avoid delamination and cracking.
  • the shear stress on the shaped double-sided tape can be further alleviated. This is more conducive to reducing or avoiding cracking.
  • the size of the overlapping area of the upper adhesive layer 32 and the lower adhesive layer 33 It is smaller than 1/3 of the size of the base material layer 31.
  • the upper glue layer 32 and the lower glue layer 33 are separated from each other by the base material layer 31.
  • the bending axis D1 is described above, the embodiments of the present disclosure are not limited thereto.
  • the flexible display device provided by the embodiment of the present disclosure may have a plurality of bending axes D1 (for example, they are parallel to the bending axis D1 shown in FIGS. 1 to 7).
  • the flexible display device shown in FIG. 3 may further have another bending axis that is perpendicular to the plane where the cross section of FIG. 3 (for example, taken along the bending axis D1) is located.
  • the first substrate 10 and the second substrate 20 are connected by a shaped double-sided tape.
  • the first substrate 10 and the second substrate 20 are connected by a shaped double-sided tape.
  • the first substrate 10 and the second substrate 20 are both connected by a shaped double-sided tape.
  • the upper adhesive layer 32 is closer to the middle of the flexible display device than the lower adhesive layer 33.
  • the upper adhesive layer 32 is farther from the middle of the flexible display device than the lower adhesive layer 33.
  • the upper adhesive layer 32 is closer to the middle of the flexible display device than the lower adhesive layer 33, and is opposite to the one profiled double-sided adhesive tape.
  • the upper adhesive layer 32 is farther from the middle of the flexible display device than the lower adhesive layer 33.
  • the special-shaped double-sided tape therein has a better effect of alleviating various stresses.
  • the flexible display device shown in FIG. 4 is “recessed downward” in the middle, the special-shaped double-sided tape therein has a better relief effect on various stresses.
  • the display area of the flexible display device is rectangular, and the flexible display device has only one bending axis D1.
  • the flexible display device in FIG. 3 may have only one bending axis D1.
  • the uniformly shaped double-sided tape shown in FIG. 1 is bonded.
  • the uniform-shaped double-sided adhesive tape includes a substrate layer 31, an upper layer 32, and a lower layer 33.
  • the first substrate 10 and the substrate layer 31 are bonded through the lower layer 33, and the second substrate 20 and the substrate The layer 31 is bonded by a sizing layer 32.
  • the uniformly shaped double-sided tape can have greater adhesion to prevent the first substrate 10 and the second substrate 20 from being separated.
  • the size of the upper adhesive layer 32, the substrate layer 31, and the lower adhesive layer 33 is the same in the extending direction of the bending axis D1, that is, the three are in the extending direction of the bending axis D1.
  • the sides are aligned, as shown in Figure 1. Replacing the part of a shaped double-sided tape or a shaped double-sided tape in FIG. 2 to FIG. 6 with a uniform-shaped double-sided tape can also partially alleviate the aforementioned tensile stress and shear stress, while preventing the first substrate 10 and the The second substrate 20 is phase separated.
  • a display component may be provided between the first substrate 10 and the second substrate 20 to implement a display function and / or a touch function.
  • the display part may include a circular polarizer 42, a touch panel 43, an optical glue 41, a thin film encapsulation layer 44, a light emitting device layer 45, a driving transistor layer 46, a flexible substrate layer 47, and Supporting film 48.
  • the display component may be formed on the first substrate 10, for example, directly bonded or fixed on the first substrate 10, or other components such as a heat sink module may be provided between the display component and the first substrate.
  • the heat dissipation module is used to reduce the temperature of the display component.
  • the display component is connected to the second substrate 20 through an optical adhesive.
  • the display component includes any one of a display panel, a combination of a display panel and a touch panel, and a display touch panel.
  • the display panel may include a thin film encapsulation layer 44, a light emitting device layer 45, a driving transistor layer 46, and a flexible substrate layer 47.
  • the display panel is connected to the heat dissipation assembly 50 through a support film 48.
  • the display panel is attached to the touch panel 43 through the optical glue 41.
  • the circular polarizer 42 is attached on the upper surface (the surface facing the second substrate 20) of the touch panel 43.
  • the second substrate 20 and the circular polarizer 42 are fixed together by another layer of optical glue 41.
  • the embodiment of the present disclosure does not have any limitation on the specific structure of the display part. Any existing flexible display component and its surrounding structure can be applied to the embodiments of the present disclosure.
  • the embodiment of the present disclosure provides a special-shaped double-sided adhesive tape, which includes a lower adhesive layer 33, a substrate layer 31, and an upper adhesive layer 32 which are sequentially stacked together, as shown in FIGS. 2 to 6.
  • the stacking direction of the lower adhesive layer 33, the base material layer 31, and the upper adhesive layer 32 of the profiled double-sided adhesive tape (that is, the vertical direction in FIGS. 2 to 6 or perpendicular to the bend In the direction of the axis D1)
  • the upper glue layer 32 has a non-overlapping area that does not overlap with the lower glue layer 33
  • / or the lower glue layer 33 has a non-overlapping area with the upper glue layer 32 Overlapping non-overlapping areas.
  • the sizes of the upper glue layer 32 and the lower glue layer 33 are smaller than the size of the substrate layer 31, and the upper glue layer 32 and The size of the overlapping area of the undersize layer 33 is smaller than the smaller one of the size of the oversize layer 32 and the size of the undersize layer 33.
  • the size of the overlapping area of the upper glue layer 32 and the lower glue layer 33 is smaller than 1/3 of the size of the substrate layer 31.
  • the upper glue layer 32 and the lower glue layer 33 have no overlap, that is, are separated from each other by the substrate layer 31.
  • the substrate layer 31 is made of a flexible material.
  • the substrate layer is made of at least one of polyethylene terephthalate, polyethylene naphthalate, cycloolefin polymer, polyimide, and polycarbonate.
  • each of the upper layer 32 and the lower layer 33 is made of at least one of acrylic, silicone-based resin, polyurethane, and epoxy resin.

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Abstract

一种柔性显示装置和一种异形双面胶带。柔性显示装置被构造为沿着一个弯折轴线（D1）可弯折，在这个弯折轴线（D1）的两端上具有两个相对侧面，并且包括：对置的第一基板（10）和第二基板（20）；以及异形双面胶带，在两个相对侧面中的至少一个侧面处将第一基板（10）和第二基板（20）彼此粘结起来。异形双面胶带包括依次堆叠在一起的下胶层（33）、基材层（31）和上胶层（32），第一基板（10）和基材层（31）通过下胶层（33）粘结，第二基板（20）与基材层（31）通过上胶层（32）粘结。异形双面胶带的下胶层（33）、基材层（31）和上胶层（32）的堆叠方向上，上胶层（32）具有与下胶层（33）不交叠的非交叠区，和/或，下胶层（33）具有与上胶层（32）不交叠的非交叠区。

Description

柔性显示装置和异形双面胶带
相关申请的交叉引用
本申请要求于2018年5月28日提交的中国专利申请No.201810523461.5的优先权，该专利申请的全部内容通过引用方式合并于此。
技术领域
本公开属于显示技术领域，具体涉及一种柔性显示装置和一种异形双面胶带。
背景技术
随着科学和技术的发展，柔性显示装置已经成为了现实。柔性显示装置可以包括彼此对置的第一基板、第二基板和设置在第一基板、第二基板之间的显示面板。由于柔性显示装置在使用过程中会被反复弯折，这可导致第一基板和第二基板相互分离，从而降低柔性显示装置的可靠性和使用寿命。因此，期望提供能将柔性显示装置的第一基板和第二基板可靠地粘结(或连接)在一起的胶带，并且提供可靠性高和使用寿命长的柔性显示装置。
发明内容
本公开的实施例提供了一种柔性显示装置和一种异形双面胶带。
本公开的一方面提供了一种柔性显示装置，所述柔性显示装置被构造为沿至少一个弯折轴线可弯折，且所述柔性显示装置在所述弯折轴线的两端上具有两个相对侧面；所述柔性显示装置包括：
对置的第一基板和第二基板；以及
异形双面胶带，其在所述两个相对侧面中的至少一个侧面处将所述第一基板和所述第二基板彼此粘结起来，其中，所述异形双面胶带包括依次堆叠在一起的下胶层、基材层和上胶层，所述第一基板与所述基材层通过所述下胶层粘结，所述第二基板与所述基材层通过所述上胶层粘结；以及
其中，在所述异形双面胶带的所述下胶层、所述基材层和所述上胶层的堆叠方向上，所述上胶层具有与所述下胶层不交叠的非交叠区，和/或，所述下胶层具有与所述上胶层不交叠的非交叠区。
在一个实施例中，在所述弯折轴线的延伸方向上，所述上胶层与所述下胶层的尺寸均小于所述基材层的尺寸，所述上胶层与所述下胶层的交叠区的尺寸小于所述上胶层的尺寸和所述下胶层的尺寸中的较小一个。
在一个实施例中，在所述弯折轴线的延伸方向上，所述上胶层与所述下胶层的交叠区的尺寸小于所述基材层的尺寸的1/3。
在一个实施例中，在所述弯折轴线的延伸方向上，所述上胶层与所述下胶层间没有交叠。
在一个实施例中，在所述弯折轴线的两端上的两个侧面中的每一个处，所述第一基板和所述第二基板均通过所述异形双面胶带连接。
在一个实施例中，在任意一个异形双面胶带中，所述上胶层比所述下胶层更靠近所述柔性显示装置的中部；和/或
在任意一个异形双面胶带中，所述上胶层比所述下胶层更远离所述柔性显示装置的中部。
在一个实施例中，所述柔性显示装置的显示区域为矩形，并且所述柔性显示装置仅具有一个弯折轴线。
在一个实施例中，在所述弯折轴线的两端上的两个侧面中的至少一个处，所述第一基板与所述第二基板的至少一部分边缘部通过均匀形状双面胶带粘结；
其中，所述均匀形状双面胶带包括依次堆叠在一起的第二下 胶层、第二基材层和第二上胶层，所述第一基板与所述第二基材层通过所述第二下胶层粘结，所述第二基板与所述第二基材层通过所述第二上胶层粘结；以及
其中，在所述弯折轴线的延伸方向上，所述第二上胶层、所述第二基材层与所述第二下胶层的尺寸相同。
在一个实施例中，所述柔性显示装置还包括显示部件，所述显示部件设置在所述第一基板与所述第二基板之间。
在一个实施例中，所述显示部件形成在所述第一基板上。
在一个实施例中，所述显示部件通过光学胶与所述第二基板连接。
在一个实施例中，所述显示部件包括显示面板、显示触控面板和显示面板与触控面板的组合件中的任一项。
在一个实施例中，所述第二基板为盖板，并且所述第一基板为中框。
本公开的另一方面提供了一种异形双面胶带，该异形双面胶带包括依次堆叠在一起的下胶层、基材层和上胶层，其中，
在所述异形双面胶带的所述下胶层、所述基材层和所述上胶层的堆叠方向上，所述上胶层具有与所述下胶层不交叠的非交叠区，和/或，所述下胶层具有与所述上胶层不交叠的非交叠区。
在一个实施例中，在与所述堆叠方向垂直的方向上，所述上胶层与所述下胶层的尺寸均小于所述基材层的尺寸，所述上胶层与所述下胶层的交叠区的尺寸小于所述上胶层的尺寸和所述下胶层的尺寸中的较小一个。
在一个实施例中，在与所述堆叠方向垂直的方向上，所述上胶层与所述下胶层的交叠区的尺寸小于所述基材层的尺寸的1/3。
在一个实施例中，在与所述堆叠方向垂直的方向上，所述上胶层与所述下胶层间没有交叠。
在一个实施例中，所述基材层由柔性材料制成。
在一个实施例中，所述基材层由聚对苯二甲酸乙二醇酯、聚萘二甲酸乙二醇酯、环烯烃聚合物、聚酰亚胺和聚碳酸酯中的至 少一种制成。
在一个实施例中，所述上胶层和所述下胶层中的每一个由丙烯酸、硅基树脂、聚氨酯和环氧树酯中的至少一种制成。
附图说明
图1为为本公开的实施例的一种柔性显示装置的结构示意图；
图2为本公开的实施例的一种柔性显示装置的结构示意图；
图3为本公开的实施例的一种柔性显示装置的结构示意图；
图4为本公开的实施例的一种柔性显示装置的结构示意图；
图5为本公开的实施例的一种柔性显示装置的结构示意图；
图6为本公开的实施例的一种柔性显示装置的结构示意图；
以及
图7为本公开的实施例的一种柔性显示装置的弯折的示意图。
具体实施方式
为使本领域技术人员更好地理解本公开的技术方案，下面结合附图和具体实施方式对本公开作进一步详细描述。
图7为本公开的实施例的一种柔性显示装置的弯折的示意图。
如图7所示，所述柔性显示装置被构造为沿至少一个弯折轴线D1可弯折，且所述柔性显示装置在所述弯折轴线D1的两端上具有两个相对侧面S1和S2。此外，所述柔性显示装置还包括在与所述弯折轴线D1垂直的方向上的两个相对侧面S3和S4。图7的左边部分示出了所述柔性显示装置未被弯折的状态，此时所述柔性显示装置可具有较大的显示屏。在图7的左边部分所示的柔性显示装置的一部分(例如，下半部分)固定并且用户沿着图7中的曲线双箭头所示向柔性显示装置的另一部分(例如，上半部分)施加力的情况下，所述另一部分可绕着弯折轴线D1顺时针旋 转0至180度或逆时针旋转0至180度。例如，图7的中间部分示出了所述另一部分绕着弯折轴线D1顺时针旋转90度的情况，并且图7的右边部分示出了所述另一部分绕着弯折轴线D1顺时针旋转180度的情况。
本发明构思的发明人发现，由于柔性显示装置在使用过程中会被反复弯折，这可导致第一基板和第二基板相互分离，从而降低柔性显示装置的可靠性和使用寿命。因此，本公开的实施例提供能将柔性显示装置的第一基板和第二基板可靠地粘结(或连接)在一起的胶带，并且提供可靠性高和使用寿命长的柔性显示装置。
如图1所示，本公开的实施例提供了一种柔性显示装置。该柔性显示装置包括对置的第一基板10和第二基板20，以及将第一基板10和第二基板20的边缘通过粘结在一起的均匀形状双面胶带。所述均匀形状双面胶带包括依次堆叠在一起的下胶层33、基材层31和上胶层32。在所述下胶层33、所述基材层31和所述上胶层32的堆叠方向(即，如图1中的垂直于所述弯折轴线D1的竖直方向)上，所述下胶层33、所述基材层31和所述上胶层32的尺寸相同(即，具有“均匀形状”)。换言之，在所述堆叠方向上，所述下胶层33、所述基材层31和所述上胶层32彼此完全交叠。即，上胶层32、基材层31与下胶层33在弯折轴线D1的延伸方向上是对齐的。这样，所述均匀形状双面胶带能够可靠地将第一基板和第二基板粘结在一起，延长了柔性显示装置的寿命。此外，所述均匀形状双面胶带的制造工艺简单。图1中示出了在第一基板10和第二基板20的左侧面S1和右侧面S2处分别设置有均匀形状双面胶带。可替换地，如图1和图7的左边部分所示的第一基板10和第二基板20的左侧面S1、右侧面S2、上侧面S3和下侧面S4都可以设置有该均匀形状双面胶带，从而在第一基板10和第二基板20之间形成一个封闭的空间。在这个封闭空间内设置有显示部件。图1中示出了该显示部件的堆叠结构及该显示部件的周边结构，从第二基板20到第一基板10依次为：光学胶(或光学透明胶，OCA)41、圆偏光片42、触控面板(TSP) 43、光学胶41、薄膜封装层44、发光器件层45、驱动晶体管层46、柔性衬底层47、支撑膜48和散热组件50。该显示面板可包括薄膜封装层44、发光器件层45、驱动晶体管层46和柔性衬底层47。
当该柔性显示装置的侧面(例如，侧面S3)受到如图7的中间部分的曲线双箭头所示的力从而发生弯折时，该均匀形状双面胶带同时承受该柔性显示装置的厚度方向上的拉伸应力和沿弯折轴线D1的延伸方向上的剪切应力。由于该均匀形状双面胶带的在所述厚度方向上的各个部分具有相同的尺寸，因此不容易发生相应的形变以缓解所述拉伸应力和所述剪切应力。由此，第一基板10或第二基板20与该均匀形状双面胶带可能会出现开裂的现象。
为了提供具有高粘附力和能够有效缓解所述拉伸应力和所述剪切应力的双面胶带(下文称为异形双面胶带，此处的“异形”是相对于上文的“均匀形状”而言的)，并且提供可靠性高和使用寿命长的柔性显示装置。下文将参照图2至图7来描述本公开的一些实施例。
如图2至图6所示，本公开的实施例提供了一种柔性显示装置。该柔性显示装置被构造为沿至少一个弯折轴线D1可弯折，且柔性显示装置在弯折轴线D1的两端上具有两个相对侧面S1、S2。该柔性显示装置包括对置的第一基板10和第二基板20；以及异形双面胶带，其在所述两个相对侧面S1、S2中的至少一个侧面处将第一基板10和第二基板20的边缘部彼此粘结(或连接)起来。异形双面胶带包括依次堆叠的下胶层33、基材层31和上胶层32。第一基板10与基材层31通过下胶层33粘结，第二基板20与基材层31通过上胶层32粘结。在与弯折轴线D1垂直的方向(即，所述异形双面胶带的所述下胶层33、所述基材层31和所述上胶层32的堆叠方向)上，上胶层32具有与下胶层33不交叠的非交叠区，和/或，下胶层33具有与上胶层32不交叠的非交叠区。换言之，在与弯折轴线D1垂直的方向(即，所述异形双面胶带的所述下胶层33、所述基材层31和所述上胶层32的堆叠方向)上，上 胶层32的一部分不与下胶层33交叠，和/或，下胶层33的一部分不与上胶层32交叠。即，在弯折轴线D1的延伸方向上，下胶层33、基材层31和上胶层32具有不同的尺寸，因此它们所构成的双面胶带是“异形”的。
例如，第一基板10为中框(Medium Frame)，第二基板20例如为盖板(Cover Film)。中框可以是位于柔性显示装置的盖板和底板之间的框架。该盖板例如是无触控功能的柔性盖板或者具备触控功能的柔性盖板。
例如，基材层31由弯折性能好的材料(即，柔性材料)形成，例如，由聚对苯二甲酸乙二醇酯(PET)、聚萘二甲酸乙二醇酯(PEN)、环烯烃聚合物(COP)、聚酰亚胺(PI)、聚碳酸酯(PC)中的一种或几种材料形成。在一个实施例中，基材层31由聚酰亚胺(PI)形成。上胶层32和下胶层33中的每一个例如采用丙烯酸、硅基树脂、聚氨酯和环氧树酯中的至少一种制成。
虽然上文描述了所述柔性显示装置的一些弯折方式。然而，本公开的实施例不限于此。例如，参见图2至图6，在图中所示的视角下，该柔性显示装置的中间区域能够因受力而向上“鼓起”，中间区域比左右两侧“高”；或者该柔性显示装置的中间区域能够因受力而向下“凹陷”，中间区域比左右两侧“低”。
例如，由于上胶层32和下胶层33是分别粘结在基材层33上的，故在弯折轴线D1的延伸方向上，它们不应“超出”基材层33的边界。
此外，如图2所示，在弯折轴线D1的延伸方向上，至少有一个胶层(图2中的下胶层33)可以具有不与另一个胶层(图2中的上胶层)交叠的部分(即，图2的下胶层33的右边部分)。
例如，如图2至图6所示，上胶层32与下胶层33存在非交叠区，并且上胶层32的非交叠区的数量与下胶层33的非交叠区的数量之一最多为1。也即是，上胶层32与下胶层33是分别设置在基材层31在弯折轴线D1的延伸方向上的两个端部，而不会出现一个胶层设于另一胶层的中间区域，从而所述另一胶层的两端 均有非交叠区的情况。换言之，上胶层32设置在基材层31的上表面上，下胶层33设置在基材层31的下表面上，并且上胶层32和下胶层33分别与基材层31的相对两端对齐。
例如，在图2所示的柔性显示装置中，在弯折轴线D1的延伸方向上，仅上胶层32的尺寸小于基材层31的尺寸，而下胶层33的尺寸可以等于基材层31的尺寸。在图2中，左侧的异形双面胶带的上胶层32位于该异形双面胶带的基材层31的左侧，右侧的异形双面胶带的上胶层32位于该异形双面胶带的基材层31的右侧。仅下胶层33具有与上胶层32不交叠的非交叠区(即，下胶层33的在竖直方向上不与上胶层32交叠的右侧部分)。
例如，在图2至图4中，所述柔性显示装置的左右两侧处的两个异形双面胶带关于所述柔性显示装置的竖直中轴线对称。然而，本公开的实施例不限于此，例如，在图5和图6中，所述柔性显示装置的左右两侧处的两个异形双面胶带关于所述柔性显示装置的竖直中轴线非对称。
例如，在图3和图4所示的柔性显示装置中，在同一个异形双面胶带中，在弯折轴线D1的延伸方向上，上胶层32与下胶层33的尺寸均小于基材层31的尺寸，上胶层32与下胶层33交叠区的尺寸小于上胶层32的尺寸和下胶层33的尺寸中较小的一个。也即是，上胶层32与下胶层33是“左右错开”的。
上述图2至图6中所示的各异形双面胶带可以通过对图1所示的均匀形状双面胶带切除部分上胶层32和/或切除部分下胶层33的方法制得。
由于在同一个异形双面胶带中的上胶层32和下胶层33中的一个相对于另一个具有一定的移除部分，使得具有移除部分的胶层在弯折轴线D1的延伸方向上更易于“滑移”(即，发生相应的变形)，并使得具有移除部分的胶层在柔性显示装置的厚度方向上所受拉伸应力更小。从而有利于减少或避免分层和开裂的现象。
进一步地，由于上胶层32与下胶层33是左右错开的，因此能够进一步缓解该异形双面胶带受到的剪切应力。从而更有利于 减少或避免开裂的现象。
例如，在图2和图3所示的柔性显示装置中，在同一个异形双面胶带中，在弯折轴线D1的延伸方向上，上胶层32与下胶层33的交叠区的尺寸小于基材层31的尺寸的1/3。
也即是，上胶层32与下胶层33在彼此交叠的情况下左右错开的幅度越大，越有利于缓解该异形双面胶带整体上受到的剪切应力，越不易发生开裂的现象。
基于相同的原理，例如，在同一个异形双面胶带中，在弯折轴线D1的延伸方向上，上胶层32与下胶层33之间没有交叠(即交叠区的尺寸为0)。换言之，上胶层32与下胶层33通过基材层31彼此隔开。
需要说明的是，虽然上文描述了弯折轴线D1，但是本公开的实施例不限于此。例如，本公开的实施例提供的柔性显示装置可以具有多个弯折轴线D1(例如，它们平行于图1至图7中所示的弯折轴线D1)。可替换地，例如，图3所示的柔性显示装置可以还具有另一弯折轴线，该弯折轴线垂直于图3的(例如，沿着弯折轴线D1截取的)截面所在的平面。
例如，在弯折轴线D1的两端上的两个侧面S1和S2中的每一个处，第一基板10和第二基板20均通过异形双面胶带连接。例如，在侧面S1至S4中的至少一个处，第一基板10和第二基板20通过异形双面胶带连接。例如，在侧面S1至S4处，第一基板10和第二基板20都通过异形双面胶带连接。
参见图4，例如，在任意一个异形双面胶带中，其上胶层32比下胶层33更靠近柔性显示装置的中部。可替换地，如图3所示，在任意一个异形双面胶带中，其上胶层32比下胶层33更远离柔性显示装置的中部。可替换地，如图5和图6所示，在一个异形双面胶带中，其上胶层32比下胶层33更靠近柔性显示装置的中部，而在与所述一个异形双面胶带相对的另一个异形双面胶带中，其上胶层32比下胶层33更远离柔性显示装置的中部。
例如，图3所示的柔性显示装置在其中部“向上鼓起”时， 其中的异形双面胶带对各类应力的缓解效果更佳。而图4所示的柔性显示装置在其中部“向下凹陷”时，其中的异形双面胶带对各类应力的缓解效果更佳。
在一个实施例中，柔性显示装置的显示区域为矩形，柔性显示装置仅具有一个弯折轴线D1。例如，图3中的柔性显示装置可以仅具有一个弯折轴线D1。
在一个实施例中，第一基板10与第二基板20的至少一个侧面(如图7所示的侧面S1、侧面S2、侧面S3和侧面S4中的任一个)的至少一部分边缘部可以通过如图1所示的均匀形状双面胶带粘结。如上所述，该均匀形状双面胶带包括基材层31、上胶层32和下胶层33，第一基板10与基材层31通过下胶层33粘结，第二基板20与基材层31通过上胶层32粘结。在弯折轴线D1的延伸方向上，上胶层32、基材层31与下胶层33的尺寸相同。因此，该均匀形状双面胶带可以具有更大的粘附力，以防止第一基板10与第二基板20相分离。
在同一个均匀形状双面胶带中，在弯折轴线D1的延伸方向上，上胶层32、基材层31和下胶层33的尺寸相同，即，三者在弯折轴线D1的延伸方向上的各个侧面是对齐的，如图1所示。将图2至图6中的一个异形双面胶带或者一个异形双面胶带中的部分替换为均匀形状双面胶带，亦能部分缓解上述拉伸应力和剪切应力，同时防止第一基板10与第二基板20相分离。
在一个实施例中，在第一基板10与第二基板20间可设有显示部件，从而实现显示功能和/或触摸功能。例如，该显示部件可以包括图1至图6中所示的圆偏光片42、触控面板43、光学胶41、薄膜封装层44、发光器件层45、驱动晶体管层46、柔性衬底层47和支撑膜48。
显示部件可以形成在第一基板10上，例如直接粘结或者固定在第一基板10上或者显示部件与第一基板之间设有其他部件，例如散热模组。该散热模组用于降低该显示部件的温度。
例如，显示部件通过光学胶与第二基板20连接。
例如，显示部件包括：显示面板、显示面板与触控面板的组合件、显示触控面板中的任一项。
例如，在图1至图6中示出了显示面板与触控面板的组合件。该显示面板可包括薄膜封装层44、发光器件层45、驱动晶体管层46和柔性衬底层47。该显示面板通过支撑膜48连接在散热组件50上。该显示面板通过光学胶41与触控面板43贴附在一起。圆偏光片42贴附在触控面板43的上表面(朝向第二基板20的表面)上。由另一层光学胶41将第二基板20与圆偏光片42固定在一起。
本公开的实施例对显示部件的具体结构没有任何限制。任何现有的柔性显示部件及其周边结构均可应用于本公开的实施例中。
本公开的实施例提供了一种异形双面胶带，该异形双面胶带包括依次堆叠在一起的下胶层33、基材层31和上胶层32，如图2至图6所示。在所述异形双面胶带的所述下胶层33、所述基材层31和所述上胶层32的堆叠方向(即，图2至图6中的竖直方向，或垂直于弯折轴线D1的方向)上，所述上胶层32具有与所述下胶层33不交叠的非交叠区，和/或，所述下胶层33具有与所述上胶层32不交叠的非交叠区。
在一个实施例中，在与所述堆叠方向垂直的方向上，所述上胶层32与所述下胶层33的尺寸均小于所述基材层31的尺寸，所述上胶层32与所述下胶层33的交叠区的尺寸小于所述上胶层32的尺寸和所述下胶层33的尺寸中的较小一个。
在一个实施例中，在与所述堆叠方向垂直的方向上，所述上胶层32与所述下胶层33的交叠区的尺寸小于所述基材层31的尺寸的1/3。
在一个实施例中，在与所述堆叠方向垂直的方向上，所述上胶层32与所述下胶层33间没有交叠，即通过所述基材层31彼此隔开。
在一个实施例中，所述基材层31由柔性材料制成。例如，所述基材层由聚对苯二甲酸乙二醇酯、聚萘二甲酸乙二醇酯、环烯 烃聚合物、聚酰亚胺和聚碳酸酯中的至少一种制成。
在一个实施例中，所述上胶层32和所述下胶层33中的每一个由丙烯酸、硅基树脂、聚氨酯和环氧树酯中的至少一种制成。
所述异形双面胶带的其他结构特征和优点可以参照上文，在此不再赘述。
在没有明显冲突的情况下，本公开的各个实施例可以相互组合。
应当理解的是，以上实施方式仅仅是为了说明本公开的原理而采用的示例性实施方式，然而本公开并不局限于此。对于本领域内的普通技术人员而言，在不脱离本公开的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本公开的保护范围。

Claims (20)

  1. 一种柔性显示装置，所述柔性显示装置被构造为沿至少一个弯折轴线可弯折，且所述柔性显示装置在所述弯折轴线的两端上具有两个相对侧面；所述柔性显示装置包括：
    对置的第一基板和第二基板；以及
    异形双面胶带，其在所述两个相对侧面中的至少一个侧面处将所述第一基板和所述第二基板彼此粘结起来，其中，所述异形双面胶带包括依次堆叠在一起的下胶层、基材层和上胶层，所述第一基板与所述基材层通过所述下胶层粘结，所述第二基板与所述基材层通过所述上胶层粘结；以及
    其中，在所述异形双面胶带的所述下胶层、所述基材层和所述上胶层的堆叠方向上，所述上胶层具有与所述下胶层不交叠的非交叠区，和/或，所述下胶层具有与所述上胶层不交叠的非交叠区。
  2. 根据权利要求1所述的柔性显示装置，其中，
    在所述弯折轴线的延伸方向上，所述上胶层与所述下胶层的尺寸均小于所述基材层的尺寸，所述上胶层与所述下胶层的交叠区的尺寸小于所述上胶层的尺寸和所述下胶层的尺寸中的较小一个。
  3. 根据权利要求1或2所述的柔性显示装置，其中，在所述弯折轴线的延伸方向上，所述上胶层与所述下胶层的交叠区的尺寸小于所述基材层的尺寸的1/3。
  4. 根据权利要求1至3中任一项所述的柔性显示装置，其中，在所述弯折轴线的延伸方向上，所述上胶层与所述下胶层间没有交叠。
  5. 根据权利要求1至4中任一项所述的柔性显示装置，其中，在所述弯折轴线的两端上的两个侧面中的每一个处，所述第一基板和所述第二基板均通过所述异形双面胶带连接。
  6. 根据权利要求1至5中任一项所述的柔性显示装置，其中，
    在任意一个异形双面胶带中，所述上胶层比所述下胶层更靠近所述柔性显示装置的中部；和/或
    在任意一个异形双面胶带中，所述上胶层比所述下胶层更远离所述柔性显示装置的中部。
  7. 根据权利要求1至6中任一项所述的柔性显示装置，其中，所述柔性显示装置的显示区域为矩形，并且所述柔性显示装置仅具有一个弯折轴线。
  8. 根据权利要求1至4中任一项所述的柔性显示装置，其中，在所述弯折轴线的两端上的两个侧面中的至少一个处，所述第一基板与所述第二基板的至少一部分边缘部通过均匀形状双面胶带粘结；
    其中，所述均匀形状双面胶带包括依次堆叠在一起的第二下胶层、第二基材层和第二上胶层，所述第一基板与所述第二基材层通过所述第二下胶层粘结，所述第二基板与所述第二基材层通过所述第二上胶层粘结；以及
    其中，在所述弯折轴线的延伸方向上，所述第二上胶层、所述第二基材层与所述第二下胶层的尺寸相同。
  9. 根据权利要求1至8中任一项所述的柔性显示装置，还包括显示部件，所述显示部件设置在所述第一基板与所述第二基板之间。
  10. 根据权利要求9所述的柔性显示装置，其中，所述显示部 件形成在所述第一基板上。
  11. 根据权利要求9或10所述的柔性显示装置，其中，所述显示部件通过光学胶与所述第二基板连接。
  12. 根据权利要求9至11中任一项所述的柔性显示装置，其中，所述显示部件包括：
    显示面板、显示触控面板和显示面板与触控面板的组合件中的任一项。
  13. 根据权利要求1至12中任一项所述的柔性显示装置，其中，所述第二基板为盖板，并且所述第一基板为中框。
  14. 一种异形双面胶带，包括依次堆叠在一起的下胶层、基材层和上胶层，其中，
    在所述异形双面胶带的所述下胶层、所述基材层和所述上胶层的堆叠方向上，所述上胶层具有与所述下胶层不交叠的非交叠区，和/或，所述下胶层具有与所述上胶层不交叠的非交叠区。
  15. 根据权利要求14所述的异形双面胶带，其中，
    在与所述堆叠方向垂直的方向上，所述上胶层与所述下胶层的尺寸均小于所述基材层的尺寸，所述上胶层与所述下胶层的交叠区的尺寸小于所述上胶层的尺寸和所述下胶层的尺寸中的较小一个。
  16. 根据权利要求14或15所述的异形双面胶带，其中，在与所述堆叠方向垂直的方向上，所述上胶层与所述下胶层的交叠区的尺寸小于所述基材层的尺寸的1/3。
  17. 根据权利要求14至16中任一项所述的异形双面胶带，其 中，在与所述堆叠方向垂直的方向上，所述上胶层与所述下胶层间没有交叠。
  18. 根据权利要求14至17中任一项所述的异形双面胶带，其中，所述基材层由柔性材料制成。
  19. 根据权利要求14至18中任一项所述的异形双面胶带，其中，所述基材层由聚对苯二甲酸乙二醇酯、聚萘二甲酸乙二醇酯、环烯烃聚合物、聚酰亚胺和聚碳酸酯中的至少一种制成。
  20. 根据权利要求14至19中任一项所述的异形双面胶带，其中，所述上胶层和所述下胶层中的每一个由丙烯酸、硅基树脂、聚氨酯和环氧树酯中的至少一种制成。
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