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WO2019128133A1 - 柔性显示屏 - Google Patents

柔性显示屏 Download PDF

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Publication number
WO2019128133A1
WO2019128133A1 PCT/CN2018/091395 CN2018091395W WO2019128133A1 WO 2019128133 A1 WO2019128133 A1 WO 2019128133A1 CN 2018091395 W CN2018091395 W CN 2018091395W WO 2019128133 A1 WO2019128133 A1 WO 2019128133A1
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WO
WIPO (PCT)
Prior art keywords
flexible display
display screen
groove
functional film
gap
Prior art date
Application number
PCT/CN2018/091395
Other languages
English (en)
French (fr)
Inventor
刘会敏
邢汝博
杨小龙
王建太
韦冬
Original Assignee
云谷（固安）科技有限公司
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.)
Filing date
Publication date
Application filed by 云谷（固安）科技有限公司 filed Critical 云谷（固安）科技有限公司
Priority to US16/377,440 priority Critical patent/US20190237689A1/en
Publication of WO2019128133A1 publication Critical patent/WO2019128133A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G06F1/1652—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being flexible, e.g. mimicking a sheet of paper, or rollable
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1615—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function
    • G06F1/1616—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/82—Cathodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/82—Cathodes
    • H10K50/822—Cathodes characterised by their shape
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/844—Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/805—Electrodes
    • H10K59/8052—Cathodes
    • H10K59/80521—Cathodes characterised by their shape
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/311—Flexible OLED
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/17—Passive-matrix OLED displays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/873—Encapsulations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a flexible display screen.
  • the flexible display screen is generally a multi-layer film structure.
  • the failure of the film layer is often caused by the concentration of stress.
  • the present invention provides a flexible display screen, which solves the technical problems of easy delamination between adjacent functional film layers when the flexible display screen is folded.
  • a flexible display screen includes a multi-layer functional film layer including sequentially stacked layers, and at least one of the multi-layer functional film layers includes a multi-segment mode as a unit constituting the functional film layer.
  • the group material is provided with gaps or grooves between the adjacent two sections of the module material.
  • the gap or groove is filled with an elastic material.
  • the elastic material has adhesive properties.
  • the elastic material fills the gap or groove.
  • the flexible display screen includes a preset bending area, and the multi-segment module material is located in the predetermined bending area.
  • the gap or the groove has a strip shape, and the extending direction of the strip shape is parallel to the bending axis of the predetermined bending region.
  • the opening direction of the groove faces the bending direction of the flexible display screen.
  • the opening direction of the groove faces away from the bending direction of the flexible display screen.
  • the multi-layer functional film layer comprises a cathode electrode layer and a display light-emitting layer
  • the cathode electrode layer comprises a multi-segment cathode electrode unit electrically connected as the multi-segment module material
  • the display light-emitting layer comprises a plurality of organic layers In the light emitting region, the cathode electrode unit is disposed in one-to-one correspondence with the organic light emitting region.
  • the organic light emitting regions are arranged in a matrix, and the cathode electrode units are correspondingly disposed on at least one column of the organic light emitting regions, and the at least one column of the organic light emitting regions extends along a bending axis of the predetermined bending region of the flexible display screen. .
  • the flexible display screen provided by the embodiment of the invention can reduce the contact area between the functional film layer and the adjacent functional film layer where the module material is located by providing a gap or a groove between two adjacent module materials. In this way, when the flexible display screen is bent, the bending stress generated by the functional film layer of the module material on the adjacent functional film layer is reduced, thereby avoiding the separation between adjacent functional film layers when the flexible display screen is bent. Or break. Further, by filling the gap or the recess with the elastic material, the gap or groove can alleviate the stress concentration and release the bending stress when the flexible display screen is bent. Therefore, by providing a groove or a gap filled with an elastic material, defects such as breakage and peeling of the multilayer functional film layer can be avoided, and the reliability performance of the flexible display panel can be improved.
  • FIG. 1 is a schematic structural diagram of a flexible display screen according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a flexible display screen according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a flexible display screen according to an embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of a flexible display screen according to an embodiment of the present invention.
  • the flexible display screen may include a multi-layer functional film layer which is sequentially stacked, and the functional film layer may be an organic film layer or an inorganic film layer, which may be understood as a basic film layer constituting the flexible display screen, for example, , an anode electrode layer, an organic light-emitting layer, a cathode electrode layer, a thin film encapsulation layer, and the like.
  • at least one functional film layer of the multi-layer functional film layer comprises a plurality of module materials 12, and the module material 12 can be understood as a unit constituting a functional film layer.
  • a gap is disposed between the adjacent two sections of the module material 12, and the gap is filled with the elastic material 11.
  • a groove may be provided between adjacent two sections of the module material 12, and the groove is filled with an elastic material 11.
  • the embodiment of the present invention does not specifically define a gap or a groove between two adjacent module materials 12 .
  • the flexible display screen of the embodiment of the invention can reduce the contact area between the functional film layer of the module material and the adjacent functional film layer by providing a gap or a groove between the adjacent two sections of the module material, so that the contact area of the functional film layer where the module material is located and the adjacent functional film layer can be reduced.
  • the bending stress generated by the functional film layer of the module material on the adjacent functional film layer is reduced, thereby preventing separation or breakage between adjacent functional film layers when the flexible display screen is bent.
  • the gap or groove can alleviate the stress concentration and release the bending stress. Therefore, by providing the grooves or gaps filled with the elastic material 11, defects such as breakage and peeling of the multilayer functional film layer can be avoided, and the reliability performance of the flexible display panel can be improved.
  • the opening direction of the groove may face the bending direction of the flexible display screen or may be away from the bending direction of the flexible display screen.
  • the embodiment of the present invention does not specifically limit the opening direction of the groove.
  • the bending direction of the flexible display screen may refer to the direction in which the flexible display screen bends when bent.
  • the elastic material 11 when a gap or a groove is disposed between two adjacent module materials 12, the elastic material 11 may have adhesive properties and may be filled with a gap or a groove, and will be located in the multi-segment module material 12 The functional layers on both sides are bonded together. This can improve the adhesion between the multilayer functional film layers, thereby avoiding delamination or breakage between the multilayer functional film layers.
  • the multi-layer functional film layer includes a display light-emitting layer 3, a cathode electrode layer 1 and a thin film encapsulation layer 2 which are sequentially stacked, and the thin film encapsulation layer 2 is mainly used for preventing immersion of water vapor and oxygen into the organic light-emitting device, preventing organic The aging of the light emitting device, thereby extending the life of the organic light emitting device.
  • the display luminescent layer 2 is used to emit display light.
  • the adhesion between the cathode electrode layer 1 and the display light-emitting layer 3 is smaller than the adhesion between the cathode electrode layer 1 and the thin film encapsulation layer 2, the adhesion filled in the gap between the plurality of stages of the cathode electrode units 102 has adhesion.
  • the elastic material 11 of the performance can bond the display light-emitting layer 3 to the thin film encapsulation layer 2, which improves the adhesion between the display light-emitting layer 3, the cathode electrode layer 1, and the thin film encapsulation layer 2, thereby preventing separation therebetween. Defects such as falling off, improve the display performance of the flexible display.
  • the flexible display screen can include a predetermined bend region, and the multi-segment module material 12 can be disposed within a predetermined bend region of the flexible display screen.
  • the multi-segment module material 12 can be disposed within a predetermined bend region of the flexible display screen.
  • only at least one functional film layer in the multi-layer functional film layer located in the predetermined bending region can be provided with a gap or a groove, and the elastic material 11 is filled in the gap or the groove, which not only simplifies the preparation of the flexible display screen. The process also improves the display performance of the flexible display.
  • the gap or the groove has a strip shape, and the cross section of the strip gap or the groove may be rectangular or trapezoidal.
  • the specific shape of the strip groove is not limited in the embodiment of the present invention.
  • the extending direction of the strip of the gap or the groove may be parallel to the bending axis X of the predetermined bending region, so that when the flexible display screen is bent, the gap between the strips or the grooves may become large, thereby The bending stress between adjacent module materials 12 is alleviated.
  • the direction in which the strips of the gaps or grooves extend may also be perpendicular to the bending axis X of the predetermined bending region or may be at an angle to the bending axis X of the predetermined bending region.
  • the angular relationship between the extending direction of the strip shape of the gap or the groove and the bending axis X of the predetermined bending area is not specifically limited in the embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a flexible display screen according to an embodiment of the present invention.
  • At least one functional film layer includes a cathode electrode layer 1, and the cathode electrode layer 1 includes a plurality of cathode electrode units 102.
  • the gap between the plurality of stages of the cathode electrode units 102 is filled with the elastic material 11, and the elastic material 11 has adhesive properties.
  • the functional film layers on both sides of the plurality of stages of the cathode electrode unit 102 can be bonded together.
  • the cathode electrode layer 1 is disposed as a plurality of electrically connected cathode electrode units 102, which can effectively alleviate the stress concentration on the cathode electrode layer 1, thereby avoiding the fracture of the cathode electrode layer 1 and the adjacent other functional film layers, Defects such as separation or shedding.
  • other functional film layers of the flexible display screen may also be a structure including a plurality of sections of the module material 12. The embodiment of the present invention does not make a structure of the flexible display screen. Specifically limited.
  • FIG. 3 is a schematic structural diagram of a flexible display screen according to an embodiment of the present invention.
  • the display light emitting layer 3 includes a plurality of organic light emitting regions 301 and pixel defining regions 302 surrounding the plurality of organic light emitting regions 301, wherein each of the organic light emitting regions 301 corresponds to one color of the light emitting pixels.
  • the illuminating pixels of the red ray, the green ray, or the blue ray are not specifically limited in the embodiment of the present invention.
  • Each of the cathode electrode units 102 is disposed correspondingly in the light emitting direction of the at least one organic light emitting region 301.
  • the gap between the adjacent cathode electrode units 102 can avoid the organic light-emitting region 301, thereby not affecting the display performance of the flexible display panel.
  • the cathode electrode unit 102 can also be disposed in one-to-one correspondence with the organic light-emitting region 301, so that the stress concentration on the cathode electrode layer 1 can be alleviated to the utmost, and the cathode electrode layer 1 and other adjacent functions can be avoided. Defects such as breakage, separation or shedding of the film layer. Since the pixel defining layer 4 is generally an insulating region, these regions do not affect the light emitting capability of the flexible display screen even if the cathode electrode unit 102 is not covered. Therefore, in the embodiment of the present invention, the cathode electrode unit 102 may not completely cover the pixel defining layer. 4. The cathode electrode unit 102 and the organic light-emitting region 301 are only disposed in one-to-one correspondence, and the display performance of the flexible display screen is not affected.
  • the plurality of organic light emitting regions 301 are distributed in a matrix. In this way, not only can the display performance of the flexible display screen be improved, but the plurality of organic light-emitting areas 301 can be covered with a flexible display screen;
  • each of the cathode electrode units 102 is disposed correspondingly in the light emitting direction of the at least one column of the organic light emitting regions 301, wherein the at least one column of the organic light emitting regions 301 is along the bending axis X of the predetermined bending region of the flexible display screen. extend.
  • the bending stress can be alleviated by the elastic material 11 located between the plurality of stages of the cathode electrode unit 102, thereby preventing separation between the display light-emitting layer 3, the cathode electrode layer 1, and the thin film encapsulation layer 2. Defects such as falling off, improve the display performance of the flexible display.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Human Computer Interaction (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

本发明实施例提出了一种柔性显示屏，包括依次叠加的多层功能膜层，所述多层功能膜层中的至少一层功能膜层包括作为构成该功能膜层的单元的多段模组材料，其中相邻的两段所述模组材料之间设置有间隙或凹槽。凹槽或间隙可以减少模组材料所在的功能膜层与相邻的功能膜层的接触面积，这样在柔性显示屏发生弯折时，减少了模组材料所在功能膜层对相邻功能膜层产生的弯曲应力，从而避免相邻功能膜层之间的分离或断裂。进一步地，间隙或凹槽中填充弹性材料，可以缓解当柔性显示屏发生弯折时，该间隙或凹槽所在功能膜层的应力集中，并释放弯曲应力。提高了柔性显示屏的可靠性能。

Description

柔性显示屏
本申请要求2017年12月29日提交的申请号为201711482314.X的中国申请的优先权，通过引用将其全部内容并入本文。
技术领域
本发明涉及显示器技术领域，具体涉及一种柔性显示屏。
发明背景
目前，柔性显示屏一般为多层膜结构，当柔性显示屏弯折时，经常会由于应力会集中引起膜层的失效。
发明内容
有鉴于此，本发明提供一种种柔性显示屏，解决了上述柔性显示屏折叠时，相邻的功能膜层之间容易分层等技术问题。
本发明一实施例提供的一种柔性显示屏包括包括依次叠加的多层功能膜层，所述多层功能膜层中的至少一层功能膜层包括作为构成该功能膜层的单元的多段模组材料，其中相邻的两段所述模组材料之间设置有间隙或凹槽。
其中，所述间隙或凹槽中填充有弹性材料。
其中，所述弹性材料具有粘合性能。
其中，所述弹性材料充满所述间隙或凹槽。
其中，所述柔性显示屏包括预设折弯区域，所述多段模组材料位于所述预设折弯区域内。
其中，所述间隙或凹槽呈条形，所述条形的延伸方向与所述预设折弯区域的弯折轴线相平行。
其中，当所述间隙或凹槽为凹槽时，所述凹槽的开口方向面向所述柔性显示屏的折弯方向。
其中，当所述间隙或凹槽为凹槽时，所述凹槽的开口方向背离所述柔性显示屏的折弯方向。
其中，所述多层功能膜层包括阴极电极层和显示发光层，所述阴极电极层包括作为所述多段模组材料的电性连接的多段阴极电极单元，所述显示发光层包括多个有机发光区域，所述阴极电极单元与所述有机发光区域一一对应设置。
其中，所述有机发光区域呈矩阵分布，所述阴极电极单元对应设置在至少一列有机发光区域上，所述至少一列有机发光区域沿所述柔性显示屏的预设弯折区 域的弯折轴线延伸。
本发明实施例提供的一种柔性显示屏，通过在相邻的两段模组材料之间设置间隙或凹槽，可以减少模组材料所在的功能膜层与相邻的功能膜层的接触面积，这样在柔性显示屏发生弯折时，减少了模组材料所在功能膜层对相邻功能膜层产生的弯曲应力，从而避免柔性显示屏发生弯折时，相邻功能膜层之间的分离或断裂。进一步地，通过在间隙或凹槽中填充弹性材料，当柔性显示屏发生弯折时，该间隙或凹槽可以缓解应力集中，并释放弯曲应力。因此，通过设置填充有弹性材料的凹槽或间隙，可以避免多层功能膜层发生断裂、剥离等缺陷，提高了柔性显示屏的可靠性能。
附图简要说明
图1所示为本发明一实施例提供的一种柔性显示屏的结构示意图。
图2所示为本发明一实施例提供的一种柔性显示屏的结构示意图。
图3所示为本发明一实施例提供的一种柔性显示屏的结构示意图。
实施本发明的方式
图1所示为本发明一实施例提供的一种柔性显示屏的结构示意图。
如图1所示，该柔性显示屏可包括依次叠加的多层功能膜层，功能膜层可以为有机膜层也可以为无机膜层，可以理解为构成该柔性显示屏的基本膜层，例如，阳极电极层、有机发光层、阴极电极层、薄膜封装层等。其中，多层功能膜层中至少一层功能膜层包括多段模组材料12，模组材料12可以理解为构成一层功能膜层的单元。其中相邻两段模组材料12之间设置有间隙，间隙中填充有弹性材料11。然而应当理解，相邻两段模组材料12之间也可设置有凹槽，凹槽中填充有弹性材料11。本发明实施例对相邻两段模组材料12之间设置间隙还是设置凹槽不作具体限定。
本发明实施例提出的柔性显示屏，通过在相邻的两段模组材料之间设置间隙或凹槽，可以减少模组材料所在的功能膜层与相邻的功能膜层的接触面积，这样在柔性显示屏发生弯折时，减少了模组材料所在功能膜层对相邻功能膜层产生的弯曲应力，从而避免柔性显示屏发生弯折时，相邻功能膜层之间的分离或断裂。进一步地，通过在间隙或凹槽中填充弹性材料11，当柔性显示屏发生弯折时，该间隙或凹槽可以缓解应力集中，并释放弯曲应力。因此，通过设置填充有弹性材料11的凹槽或间隙，可以避免多层功能膜层发生断裂、剥离等缺陷，提高了柔性显示屏的可靠性能。
在一个实施例中，当相邻的两段模组材料12之间设置有凹槽时，凹槽的开口 方向可以面向柔性显示屏的折弯方向，也可以背离柔性显示屏的折弯方向。本发明实施例对凹槽的开口方向不作具体限定。在这里，柔性显示屏的折弯方向可以是指柔性显示屏在弯折时弯曲凸起的方向。
在一个实施例中，当相邻的两段模组材料12之间设置有间隙或者凹槽时，弹性材料11可具有粘合性能，并可充满间隙或者凹槽，将位于多段模组材料12两侧的功能膜层粘合在一起。这样可以提高多层功能膜层之间的粘附性能，从而避免多层功能膜层之间的分层或断裂。
在一个实施例中，多层功能膜层包括依次叠加的显示发光层3、阴极电极层1以及薄膜封装层2，薄膜封装层2主要用于可以防止水汽和氧气的浸入有机发光器件，防止有机发光器件的老化，从而延长有机发光器件的寿命。显示发光层2用于发出显示光。虽然阴极电极层1与显示发光层3之间的粘附力小于阴极电极层1与薄膜封装层2之间的粘附力，但是填充在多段阴极电极单元102之间的间隙中的具有粘合性能的弹性材料11可以将显示发光层3与薄膜封装层2粘合，这样提高了显示发光层3、阴极电极层1以及薄膜封装层2之间的粘附性能，从而防止他们之间出现分离或脱落等缺陷，提高了柔性显示屏的显示性能。
在一个实施例中，柔性显示屏可包括预设折弯区域，多段模组材料12可设置在柔性显示屏的预设折弯区域内。这样可以仅仅对位于预设折弯区域的多层功能膜层中的至少一层功能膜层设置间隙或凹槽，并在间隙或凹槽中填充弹性材料11，不仅简化了柔性显示屏的制备工艺，还提高了柔性显示屏的显示性能。
在一个实施例中，间隙或凹槽呈条形，条形间隙或凹槽的横截面可为矩形或梯形，本发明实施例对条形凹槽的具体形状不作限定。间隙或凹槽的条形的延伸方向可以与预设折弯区域的弯折轴线X相平行，这样当柔性显示屏折弯时，条形的间隙或凹槽之间的间距可变大，从而缓解相邻的模组材料12间的弯曲应力。然而应当理解，间隙或凹槽的条形的延伸方向也可以与预设弯折区域的弯折轴线X垂直，或者与预设弯折区域的弯折轴线X之间具有夹角。本发明实施例对间隙或凹槽的条形的延伸方向与预设弯折区域的弯折轴线X之间的角度关系不作具体限定。
图2所示为本发明一实施例提供的一种柔性显示屏的结构示意图。
参考图2，在一个实施例中，至少一层功能膜层包括阴极电极层1，阴极电极层1包括多段阴极电极单元102。多段阴极电极单元102之间的间隙中填充有弹性材料11，且该弹性材料11具有粘合性能。这样弹性材料11除了可以缓解多段阴极电极单元102之间的应力集中，还可以将多段阴极电极单元102两侧的功能膜层粘合在一起。在柔性显示屏的多层功能膜层中，阴极电极层1的脆性比较大，当柔性显示屏折弯时，在阴极电极层1上容易产生应力集中。因此，将阴极电极层1设置为多段电性连接的阴极电极单元102，可以有效地缓解了阴极电极层1 上的应力集中，从而避免阴极电极层1与相邻的其他功能膜层的断裂、分离或脱落等缺陷。然而应当理解，柔性显示屏的其他功能膜层也可以是包括多段模组材料12的结构，本发明实施例对柔性显示屏的具体哪一层功能膜层设置为多段模组材料12的结构不作具体限定。
图3所示为本发明一实施例提供的一种柔性显示屏的结构示意图。
参考图3，在一个实施例中，显示发光层3包括多个有机发光区域301以及包围多个有机发光区域301的像素限定区域302，其中的每个有机发光区域301对应一种颜色的发光像素，例如：红色光线、绿色光线或蓝色光线的发光像素，然而本发明实施例对每个有机发光区域301的发光颜色类型不作具体限定。其中，每个阴极电极单元102对应设置在至少一个有机发光区域301的发光方向上。这样相邻阴极电极单元102之间的间隙可以避开有机发光区域301，从而不影响柔性显示屏的显示性能。
然而应当理解，阴极电极单元102也可以和有机发光区域301一一对应设置，这样既可以最大限度地缓解了阴极电极层1上的应力集中，也能避免阴极电极层1与相邻的其他功能膜层的断裂、分离或脱落等缺陷。由于像素限定层4一般为绝缘区域，这些区域即使不覆盖阴极电极单元102，也不会影响柔性显示屏的发光能力，因此在本发明实施例中，阴极电极单元102可以不完全覆盖像素限定层4，仅将阴极电极单元102和有机发光区域301一一对应设置，并不影响柔性显示屏的显示性能。
在一个实施例中，多个有机发光区域301呈矩阵分布。这样不仅可以提高柔性显示屏的显示性能，多个有机发光区域301可以布满柔性显示屏；还能方便柔性显示屏的制作。
在一个实施例中，每段阴极电极单元102对应设置在至少一列有机发光区域301的发光方向上，其中，该至少一列有机发光区域301沿柔性显示屏的预设弯折区域的弯折轴线X延伸。这样，当柔性显示屏发生弯折时，通过位于多段阴极电极单元102之间的弹性材料11可以缓解弯折应力，从而防止显示发光层3、阴极电极层1以及薄膜封装层2之间出现分离或脱落等缺陷，提高了柔性显示屏的显示性能。
以上仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种柔性显示屏，其中，所述柔性显示屏包括依次叠加的多层功能膜层，
    所述多层功能膜层中的至少一层功能膜层包括作为构成该功能膜层的单元的多段模组材料，其中相邻的两段所述模组材料之间设置有间隙或凹槽。
  2. 根据权利要求1所述的柔性显示屏，其中，所述间隙或凹槽中填充有弹性材料。
  3. 根据权利要求2所述的柔性显示屏，其中，所述弹性材料具有粘合性能。
  4. 根据权利要求2所述的柔性显示屏，其中，所述弹性材料充满所述间隙或凹槽。
  5. 根据权利要求1-4任一所述的柔性显示屏，其中，所述柔性显示屏包括预设折弯区域，所述多段模组材料位于所述预设折弯区域内。
  6. 根据权利要求5所述的柔性显示屏，其中，所述间隙或凹槽呈条形，所述条形的延伸方向与所述预设折弯区域的弯折轴线相平行。
  7. 根据权利要求1-6任一所述的柔性显示屏，其中，当所述间隙或凹槽为凹槽时，所述凹槽的开口方向面向所述柔性显示屏的折弯方向。
  8. 根据权利要求1-6任一所述的柔性显示屏，其中，当所述间隙或凹槽为凹槽时，所述凹槽的开口方向背离所述柔性显示屏的折弯方向。
  9. 根据权利要求1-6任一所述的柔性显示屏，其中，所述多层功能膜层包括阴极电极层和显示发光层，所述阴极电极层包括作为所述多段模组材料的电性连接的多段阴极电极单元，所述显示发光层包括多个有机发光区域，所述阴极电极单元与所述有机发光区域一一对应设置。
  10. 根据权利要求9所述的柔性显示屏，其中，所述有机发光区域呈矩阵分布，所述阴极电极单元对应设置在至少一列有机发光区域上，所述至少一列有机发光区域沿所述柔性显示屏的预设弯折区域的弯折轴线延伸。
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