WO2019001313A1 - 柔性显示装置 - Google Patents

柔性显示装置 Download PDF

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Publication number
WO2019001313A1
WO2019001313A1 PCT/CN2018/091936 CN2018091936W WO2019001313A1 WO 2019001313 A1 WO2019001313 A1 WO 2019001313A1 CN 2018091936 W CN2018091936 W CN 2018091936W WO 2019001313 A1 WO2019001313 A1 WO 2019001313A1
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WIPO (PCT)
Prior art keywords
layer
electrodes
sub
display device
flexible display
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PCT/CN2018/091936
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English (en)
French (fr)
Inventor
杨啸剑
郁信波
张明辉
朴仁镐
陈维涛
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方显示技术有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/461,133 priority Critical patent/US10817024B2/en
Publication of WO2019001313A1 publication Critical patent/WO2019001313A1/zh

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    • 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
    • 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
    • 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
    • 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
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/50—Piezoelectric or electrostrictive devices having a stacked or multilayer structure
    • 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
    • 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 disclosure relates to a flexible display device.
  • a flexible display device comprising: a flexible substrate substrate, an electroformed layer disposed over the flexible substrate, and a display disposed over the electroformed layer Floor.
  • the electro-deformation layer is configured to generate deformation when energized, thereby driving the flexible substrate substrate and the display layer to generate corresponding deformation, enabling the flexible display device to achieve flexible display, and recovering when the power is off Original.
  • the electroformed layer comprises a first sub-stretch layer.
  • the first sub-stretching layer includes: a plurality of strip-shaped first electrodes extending in a first direction, and a plurality of strip-shaped first stretching portions extending in a second direction, wherein the second direction and the The first direction intersects, and the first tensile portion and the first electrode are electrically connected in an overlapping region.
  • the first tensile portion of the first sub-stretch layer is stretched in the second direction when a first voltage of opposite polarity is applied to two adjacent first electrodes.
  • each of the first tensile portions is provided with a first partition in a region overlapping at least one of the first electrodes, wherein the first partition is along the first
  • the width of the direction is equal to the width of the corresponding first tensile portion in the first direction, and the width of the first partition in the second direction is smaller than the corresponding first electrode in the second direction width.
  • the electro-deformation layer further includes: a second sub-stretch layer disposed on one side of the first sub-stretch layer facing the display layer, and a second sub-drawing layer disposed on the first sub-stretch layer And a first insulating protective layer between the layer and the first sub-stretch layer.
  • the second sub-stretch layer includes: a plurality of strip-shaped second electrodes extending in the second direction, and a plurality of strip-shaped second stretching portions extending along the first direction, wherein the The two tensile portions are electrically connected to the second electrode in an overlapping region. The second tensile portion of the second sub-stretch layer is stretched in the first direction when a second voltage of opposite polarity is applied to two adjacent second electrodes.
  • each of the second tensile portions is provided with a second partition in a region overlapping the at least one of the second electrodes, wherein the second partition is along the second
  • the width of the direction is equal to the width of the corresponding second tensile portion in the second direction, and the width of the second partition portion in the first direction is smaller than the corresponding second electrode in the first direction width.
  • the first stretched portion and the second stretched portion are made of an electrostrictive material.
  • the electroformed layer further includes: a sub-bend layer disposed over the substrate and in contact with the substrate.
  • the sub-bending layer includes: two strip-shaped third electrodes extending in a third direction, and at least one strip-shaped curved strip attached to the base substrate and extending in a fourth direction, the fourth The direction intersects the third direction, and the curved strip is electrically connected to the third electrode in an overlapping region.
  • a third voltage of opposite polarity is applied to the two of the third electrodes, the curved strip of the sub-bend layer is bent with a predetermined curvature.
  • the first sub-stretch layer is located above the sub-bend layer, and a second insulating protective layer is further disposed between the sub-bend layer and the first sub-stretch layer.
  • the first sub-stretch layer is disposed in the same layer as the sub-bend layer, the third direction is the same as the first direction, and the fourth direction is the same as the second direction .
  • the flexible display device includes a display area and a non-display area surrounding the display area, wherein the first electrode and the first tensile portion are both located in the display area, the third electrode and the curved strip Both are located in the non-display area, and two of the third electrodes are respectively located on opposite sides of the non-display area.
  • the curved strip is a TiNi memory alloy strip.
  • the flexible display device further includes a first electrode lead connected in one-to-one correspondence with each of the first electrodes and a control portion connected to the first electrode lead.
  • the control portion is configured to apply the first voltage of opposite polarity to the adjacent two first electrodes via the first electrode lead.
  • the flexible display device further includes a first electrode lead connected in one-to-one correspondence with each of the first electrodes, a second electrode lead connected in one-to-one correspondence with each second electrode, and the first A control portion to which the electrode lead and the second electrode lead are connected.
  • the control portion is configured to apply the first voltage of opposite polarity to the adjacent two first electrodes via the first electrode lead and to apply the opposite polarity to the adjacent two second electrodes via the second electrode lead Said second voltage.
  • the flexible display device further includes a first electrode lead connected in one-to-one correspondence with each of the first electrodes, and a second electrode lead connected in a one-to-one correspondence with each of the second electrodes, and each of the first
  • the third electrode is connected to the third electrode lead and the control portion connected to the first electrode lead, the second electrode lead and the third electrode lead.
  • the control portion is configured to apply the first voltage of opposite polarity to the adjacent two first electrodes via the first electrode lead, and to apply the opposite polarity to the adjacent two second electrodes via the second electrode lead
  • the second voltage is applied, and a third voltage of opposite polarity is applied to the adjacent two third electrodes via the third electrode lead.
  • FIG. 1 is a schematic structural diagram of a flexible display device according to some embodiments of the present disclosure
  • FIG. 2 is a schematic structural diagram of a flexible display device in which a display layer is a multilayer composite layer according to some embodiments of the present disclosure
  • FIG. 3 is a cross-sectional structural view of a flexible display device according to some embodiments of the present disclosure.
  • FIG. 4 is a top plan view of a flexible display device according to some embodiments of the present disclosure.
  • FIG. 5 is a schematic top plan view of a flexible display device according to further embodiments of the present disclosure.
  • FIG. 6 is a cross-sectional structural view of a flexible display device according to some embodiments of the present disclosure.
  • FIG. 7 is a top plan view of a flexible display device according to some embodiments of the present disclosure.
  • FIG. 8 is a schematic top plan view of a flexible display device according to further embodiments of the present disclosure.
  • FIG. 9 is a cross-sectional structural view of a flexible display device according to some embodiments of the present disclosure.
  • FIG. 10 is a schematic top plan view of a flexible display device according to some embodiments of the present disclosure.
  • FIG. 11 is a schematic top plan view of a flexible display device according to further embodiments of the present disclosure.
  • the flexible display device when the flexible display device performs flexible display, it needs to be stretched or bent by external force, and the function of automatic flexible display cannot be realized, and the flexible display of the mode has a display effect due to uneven application of force. Poor, and the problem that the display device is inconvenient to use due to the presence of stress after stretching.
  • the flexible display device provided by the present disclosure can achieve at least one of the following technical effects: automatic flexible display of a flexible display device, optimization of display effect of the flexible display device, or improvement of inconvenient use of the flexible display device.
  • FIG. 1 is a schematic structural diagram of a flexible display device according to some embodiments of the present disclosure.
  • the flexible display device includes a flexible substrate substrate 1, an electroformed layer 2 disposed on the flexible substrate 1, and a display layer 3 disposed on the electroformed layer 2.
  • the electro-deformation layer 2 is configured to be deformed when energized, thereby driving the flexible substrate substrate 1 and the display layer 3 to be deformed correspondingly, so that the flexible display device realizes flexible display and returns to the original state when the power is turned off.
  • the display layer 3 may be a composite layer including a plurality of film layers.
  • the display layer 3 may include an anode layer 31, a hole transport layer 32, and a light emitting layer in this order. 33.
  • the electroformed layer 2 may also be a composite layer comprising a plurality of film layers.
  • the electroformed layer 2 includes a first sub-stretch layer 22.
  • the first sub-stretch layer 22 includes a plurality of strip-shaped first electrodes 221 extending in the first direction AB, and a plurality of strip-shaped first tensile portions 222 extending in the second direction CD.
  • the second direction CD intersects the first direction AB.
  • the second direction CD is substantially perpendicular or perpendicular to the first direction AB.
  • the first tensile portion 222 is electrically connected to the first electrode 221 at an overlapping region.
  • the first tensile portion 222 of the first sub-stretch layer 22 is stretched in the second direction CD, thereby making the electro-deformable layer 2 Stretching in the second direction CD and driving the integral flexible display device to stretch in the second direction CD.
  • each of the first tensile portions 222 can be a unitary structure, for example, as shown in FIG. In other embodiments, each of the first tensile portions 222 may also be a discrete structure composed of a plurality of spaced apart first tensile portions. For example, as shown in FIG.
  • each of the first tensile portions 222 is provided with a corresponding first partition portion 223 in a region overlapping each of the first electrodes 221, wherein each of the first partition portions 223 is along the first
  • the width of one direction AB is equal to the width of the first tensile portion 222 in the first direction AB, and the width of each first partition portion 223 in the second direction CD is smaller than the width of the corresponding first electrode 221 in the second direction CD.
  • Each of the first stretching portions 222 is provided with a corresponding first partition portion 223 in a region overlapping the first electrode, which can improve the stretching effect of the entire first stretch portion due to the presence of a large internal stress. The problem.
  • FIG. 5 shows that a corresponding first partition portion 223 is provided for each of the first stretching portions 222 and each of the overlapping regions of each of the first electrodes 221, those skilled in the art can understand that various modifications are in the present invention.
  • each overlap region of each of the first tensile portions 222 and the selected first electrode 221 may be The first partition portion 223 is provided.
  • FIG. 6 is a schematic cross-sectional view of a flexible display device according to some embodiments of the present disclosure.
  • the electroformed layer 2 may further include: a second sub-stretch layer 23 disposed on one side of the first sub-stretch layer 22 facing the display layer 3, and a second sub-stretch layer 23 disposed on A first insulating protective layer (not shown) between the first sub-stretch layers 22.
  • FIG. 7 is a top plan view of a flexible display device provided in accordance with some embodiments of the present disclosure.
  • the second sub-stretch layer 23 includes a plurality of strip-shaped second electrodes 231 extending in the second direction CD, and a plurality of strip-shaped second stretching portions 232 extending in the first direction AB.
  • the second tensile portion 232 and the second electrode 231 are electrically connected in an overlapping region.
  • the second tensile portion 232 of the second sub-stretch layer 23 is stretched in the first direction AB, so that the electro-deformation layer 2 can Stretching in the first direction AB and driving the integral flexible display device to stretch in the first direction AB.
  • each of the second tensile portions 232 can be a unitary structure, for example, as shown in FIG. In other embodiments, each of the second tensile portions 232 may also be a discrete structure comprised of a plurality of spaced apart second tensile portions. For example, as shown in FIG. 8, each of the second tensile portions 232 is provided with a corresponding second partition portion 233 in a region overlapping each of the second electrodes 231. The width of the second partition portion 233 in the second direction CD is equal to the width of the corresponding second tensile portion 232 in the second direction CD, and the width of the second partition portion 233 in the first direction AB is smaller than the corresponding second electrode.
  • Each of the second tensile portions 232 is provided with a corresponding second partition portion 233 in a region overlapping the second electrode 231 to improve the stretching effect of the second stretched portion of the entire strip due to the presence of a large internal stress. Poor question.
  • FIG. 8 shows that a corresponding second partition portion 233 is provided for each of the second stretching portions 232 and each of the overlapping regions of each of the second electrodes 231, those skilled in the art can understand that various modifications are in the present invention.
  • each of the second tensile portions 232 and the selected second electrode 231 eg, the second, fourth, sixth, second electrode 231, or every second plurality of second electrodes 231 may be
  • the second partition portion 233 is provided in the stack region.
  • the material of the first tensile portion 222 and the second tensile portion 232 may be an electrostrictive material.
  • the first electrodes 221 are evenly spaced, and the first tensile portions 222 are evenly spaced.
  • the second electrodes 231 are evenly spaced, and the second tensile portions 232 are evenly spaced.
  • the first direction can be a lateral direction and the second direction can be a longitudinal direction. In other embodiments, the first direction can be lateral and the second direction can be longitudinal.
  • the electroformed layer 2 may further include a sub-bend layer 21 disposed on the base substrate 1 and in contact with the base substrate 1.
  • FIG. 10 is a schematic top plan view of a flexible display device according to some embodiments of the present disclosure.
  • the sub-bending layer 21 includes: two strip-shaped third electrodes 211 extending in the third direction, and at least one strip-shaped bent strip attached to the base substrate 1 and extending in the fourth direction 212.
  • the fourth direction intersects the third direction.
  • the fourth direction is substantially perpendicular or perpendicular to the third direction.
  • the curved strip 212 and the third electrode 211 are electrically connected in an overlapping region. When a third voltage of opposite polarity is applied to the two third electrodes 211, the curved strip 212 is bent with a predetermined curvature.
  • the sub-bend layer 21 can be a different layer than the first sub-stretch layer 22.
  • the first sub-stretch layer 22 may be located above the sub-bend layer 21, and a second insulating protective layer may be disposed between the sub-bend layer 21 and the first sub-stretch layer 22. show).
  • the sub-bend layer 21 and the first sub-stretch layer 22 may be located in the same layer.
  • the first sub-stretch layer 22 is disposed in the same layer as the sub-bend layer 21.
  • the third direction is the same as the first direction
  • the fourth direction is the same as the second direction.
  • the flexible display device includes a display area 41 and a non-display area 42 surrounding the display area 41.
  • the first electrode 221 and the first tensile portion 222 are both located in the display area 41, and the third electrode 211 and the curved strip 212 are located in the non-display area. 42.
  • the two third electrodes 211 are respectively disposed on opposite sides of the non-display 41 area.
  • the structure of the display device can be thinned, and the first electrode 221 and the third electrode 211 can be simultaneously formed using a one-time process.
  • the first electrode 221 and the first tensile portion 222 are disposed in the display region 41, and the third electrode 211 and the curved strip 212 are disposed in the non-display region 42.
  • the bending strip 212 can be prevented from affecting the stretching effect of the display area 41.
  • Shape Memory Alloys may be used, which is a kind of SMA which can completely eliminate the temperature at a lower temperature after heating and heating. Deformation, the restoration of the original shape of the alloy material before deformation, that is, the alloy with the "memory" effect.
  • the memory alloy is selected from a material having a double-layer memory effect, and the original state has a certain curvature shape. At a lower temperature (for example, below 40 ° C), the material is straight, and after heating and heating (for example, 60 ° C) The material will become a curved surface. When the electricity is cooled down, the material becomes straight again, and the principle can realize the control of the curved surface of the display panel.
  • the material of the curved strip is TiNi memory alloy, which has excellent memory effect and stable performance.
  • the flexible display device of some embodiments of the present disclosure may further include a first electrode lead connected in one-to-one correspondence with each of the first electrodes, a second electrode lead connected in one-to-one correspondence with the second electrode, and each third The electrodes are connected to the third electrode lead one by one, and a control member that drives the electroformed layer may also be provided.
  • the control component may be coupled to the first electrode lead, the second electrode lead, and/or the third electrode lead, and may send different control signals to the electro-deformation layer to the adjacent two first electrodes, adjacent two The second electrode and/or the two adjacent third electrodes are applied with a preset voltage of opposite polarity, so that an electric field can be formed between the adjacent electrodes, so that the first tensile portion, the second tensile portion, and/or Or the curved strip is stretched and/or bent under the action of an electric field to deform the electroformed layer.
  • the flexible display device further includes a first electrode lead connected in one-to-one correspondence with each of the first electrodes and a control portion connected to the first electrode lead.
  • the control portion is configured to apply the first voltage of opposite polarity to the adjacent two first electrodes via the first electrode lead.
  • the flexible display device further includes a first electrode lead connected in one-to-one correspondence with each of the first electrodes, a second electrode lead connected in one-to-one correspondence with each of the second electrodes, and the first electrode A control portion to which the lead and the second electrode lead are connected.
  • the control portion is configured to apply the first voltage of opposite polarity to the adjacent two first electrodes via the first electrode lead and to apply the opposite polarity to the adjacent two second electrodes via the second electrode lead Said second voltage.
  • the flexible display device further includes a first electrode lead connected in one-to-one correspondence with each of the first electrodes, a second electrode lead connected in a one-to-one correspondence with each of the second electrodes, and each of the third electrodes
  • the electrodes are connected to the third electrode lead and the control unit connected to the first electrode lead, the second electrode lead and the third electrode lead.
  • the control portion is configured to apply the first voltage of opposite polarity to the adjacent two first electrodes via the first electrode lead, and to apply the opposite polarity to the adjacent two second electrodes via the second electrode lead The second voltage is applied, and a third voltage of opposite polarity is applied to the adjacent two third electrodes via the third electrode lead.
  • Some embodiments of the present disclosure provide a flexible display device in which an electro-deformation layer is disposed between a flexible substrate and a display layer, and the electro-deformation layer can be deformed when energized, thereby driving the flexible substrate and the display layer to occur.
  • the flexible display device can realize automatic flexible display, no external force is required to be externally applied to realize flexible display, and the flexible display device can improve the flexible display device of the related art by automatically setting the electro-deformation layer by itself.
  • the flexible display is realized by a force applied from the outside, the flexible display effect due to the uneven force application is poor, and the problem of inconvenience in use which is easily restored to the original state is caused.

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Abstract

本公开提供柔性显示装置。该柔性显示装置包括：柔性衬底基板、设置在所述柔性衬底基板之上的电致形变层、以及设置在所述电致形变层之上的显示层；其中，所述电致形变层配置为在通电时产生形变，进而带动所述柔性衬底基板和所述显示层产生相应形变，使所述柔性显示装置实现柔性显示，并在断电时，恢复原状。

Description

柔性显示装置
相关申请的交叉引用
本申请要求于2017年6月26日提交的发明名称为“一种柔性显示装置”的中国专利申请第201710492705.3号的优先权，该申请的公开通过引用被全部结合于此。
技术领域
本公开涉及柔性显示装置。
背景技术
随着显示技术的高速发展，人们对于显示方式、显示效果等有了更高的追求，透明、曲面、柔性和可拉伸等概念逐渐成为了研究的热点。同时有机发光二极管(Organic Light Emitted Diode，OLED)显示器的技术发展逐步成熟，使上述概念慢慢变成了现实，由于OLED技术中屏幕像素点可以自己发光，不需要背光，因此只要找到合适的基材，就可以实现柔性可拉伸显示。早在2013年就有研究团队开发出这种柔性屏幕，不仅可以弯曲，还可以折叠、扭曲、拉伸而不会损坏，甚至可以拉伸至正常水平的两倍大小，屏幕也仍然是亮着的，放开后又会回到原来的大小。
发明内容
根据本公开一些实施例，提供一种柔性显示装置，包括：柔性衬底基板，设置在所述柔性衬底基板之上的电致形变层，以及设置在所述电致形变层之上的显示层。所述电致形变层被配置为：在通电时产生形变，进而带动所述柔性衬底基板和所述显示层产生相应形变，使所述柔性显示装置实现柔性显示，以及在断电时，恢复原状。
根据本公开一些实施例，所述电致形变层包括第一子拉伸层。所述第一子拉伸层包括：多个沿第一方向延伸的条状第一电极，以及多个沿第二方向延伸的条状第一拉伸部，其中，所述第二方向与所述第一方向交叉，所述第一拉伸部与所述第一电极在交叠区域电性连接。当在相邻两条所述第一电极施加极性相反的第一电压时，所述第一子拉伸层的所述第一拉伸部沿所述第二方向拉伸。
根据本公开一些实施例，每一所述第一拉伸部在与至少一个所述第一电极交叠的区域设置有第一隔断部，其中，所述第一隔断部在沿所述第一方向的宽度等于相应的第一拉伸部在沿所述第一方向的宽度，所述第一隔断部在沿所述第二方向的宽度小于相应的第一电极在沿所述第二方向的宽度。
根据本公开一些实施例，所述电致形变层还包括：设置在所述第一子拉伸层的面向所述显示层一面的第二子拉伸层、以及设置在所述第二子拉伸层与所述第一子拉伸层之间的第一绝缘保护层。所述第二子拉伸层包括：多个沿所述第二方向延伸的条状第二电极，以及多个沿所述第一方向延伸的条状第二拉伸部，其中，所述第二拉伸部与所述第二电极在交叠区域电性连接。当在相邻两条所述第二电极施加极性相反的第二电压时，所述第二子拉伸层的所述第二拉伸部沿所述第一方向拉伸。
根据本公开一些实施例，每一所述第二拉伸部在与至少一个所述第二电极交叠的区域设置有第二隔断部，其中，所述第二隔断部在沿所述第二方向的宽度等于相应的第二拉伸部在沿所述第二方向的宽度，所述第二隔断部在沿所述第一方向的宽度小于相应的第二电极在沿所述第一方向的宽度。
根据本公开一些实施例，所述第一拉伸部和所述第二拉伸部的材质为电致伸缩材料。
根据本公开一些实施例，所述电致形变层还包括：设置在所述衬底基板之上且与所述衬底基板接触的子弯曲层。所述子弯曲层包括：两条沿第三方向延伸的条状第三电极、以及至少一条贴附在所述衬底基板之上且沿第四方向延伸的条状弯曲条，所述第四方向与所述第三方向交叉，所述弯曲条与所述第三电极在交叠区域电性连接。当在两条所述第三电极施加极性相反的第三电压时，所述子弯曲层的所述弯曲条以预设曲率进行弯曲。
根据本公开一些实施例，所述第一子拉伸层位于所述子弯曲层之上，所述子弯曲层与所述第一子拉伸层之间还设置有第二绝缘保护层。
根据本公开一些实施例，所述第一子拉伸层与所述子弯曲层同层设置，所述第三方向与所述第一方向相同，所述第四方向与所述第二方向相同。所述柔性显示装置包括显示区以及包围所述显示区的非显示区，所述第一电极、所述第一拉伸部均位于所述显示区内，所述第三电极以及所述弯曲条均位于所述非显示区，且两条所述第三电极分别位于所述非显示区的相对的两侧。
根据本公开一些实施例，所述弯曲条为TiNi记忆合金条。
根据本公开一些实施例，所述柔性显示装置还包括与每一第一电极一一对应连接的 第一电极引线和与第一电极引线连接的控制部。控制部被配置为经由第一电极引线向相邻的两条第一电极施加极性相反的所述第一电压。
根据本公开一些实施例，所述柔性显示装置还包括与每一第一电极一一对应连接的第一电极引线，与每一第二电极一一对应连接的第二电极引线，和与第一电极引线和第二电极引线连接的控制部。控制部被配置为经由第一电极引线向相邻的两条第一电极施加极性相反的所述第一电压和经由第二电极引线向相邻的两条第二电极施加极性相反的所述第二电压。
根据本公开一些实施例，所述柔性显示装置还包括与每一第一电极一一对应连接的第一电极引线，与每一第二电极一一对应连接的第二电极引线，与每一第三电极一一对应连接的第三电极引线和与第一电极引线、第二电极引线和第三电极引线连接的控制部。控制部被配置为经由第一电极引线向相邻的两条第一电极施加极性相反的所述第一电压，经由第二电极引线向相邻的两条第二电极施加极性相反的所述第二电压，和经由第三电极引线向相邻的两条第三电极施加极性相反的第三电压。
附图说明
图1为根据本公开一些实施例提供的柔性显示装置的结构示意图；
图2为根据本公开一些实施例提供的其中显示层为多层复合层的柔性显示装置的结构示意图；
图3为根据本公开一些实施例提供的柔性显示装置的剖面结构示意图；
图4为根据本公开一些实施例提供的柔性显示装置的俯视结构示意图；
图5为根据本公开另一些实施例提供的柔性显示装置的俯视结构示意图；
图6为根据本公开一些实施例提供的柔性显示装置的剖面结构示意图；
图7为根据本公开一些实施例提供的柔性显示装置的俯视结构示意图；
图8为根据本公开另一些实施例提供的柔性显示装置的俯视结构示意图；
图9为根据本公开一些实施例提供的柔性显示装置的剖面结构示意图；
图10根据为本公开一些实施例提供的柔性显示装置的俯视结构示意图；
图11根据为本公开另一些实施例提供的柔性显示装置的俯视结构示意图。
具体实施方式
下面结合说明书附图对本公开一些实施例的实现过程进行详细说明。需要注意的是，自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本公开，而不能理解为对本公开的限制。
相关技术中柔性显示装置在进行柔性显示时，需要依靠外界施力进行拉伸或弯曲，不能实现自动柔性显示的功能，且该种方式的柔性显示，存在由于施力不均匀而导致的显示效果不佳，以及显示装置在拉伸后由于应力存在而要恢复到原状导致的使用不方便的问题。
本公开提供的柔性显示装置能实现以下至少一个技术效果：柔性显示装置的自动柔性显示，优化柔性显示装置的显示效果，或改善柔性显示装置使用不方便的问题。
图1为根据本公开一些实施例提供的柔性显示装置的结构示意图。参见图1，该柔性显示装置包括：柔性衬底基板1、设置在柔性衬底基板1之上的电致形变层2、以及设置在电致形变层2之上的显示层3。
电致形变层2配置为在通电时产生形变，进而带动柔性衬底基板1和显示层3产生相应形变，使柔性显示装置实现柔性显示，并在断电时，恢复原状。
图2为根据本公开一些实施例提供的其中显示层为多层复合层的柔性显示装置的结构示意图。在本公开一些实施例中，显示层3可以是包括多层膜层的复合层，例如，参见图2所示，显示层3可以是依次包括有阳极层31、空穴传输层32、发光层33、电子传输层34、阴极层35等的复合层。
在本公开一些实施例中，电致形变层2也可以是包括多个膜层的复合层。
图3为根据本公开一些实施例提供的柔性显示装置的剖面结构示意图。如图3所示，电致形变层2包括第一子拉伸层22。
图4为根据本公开一些实施例提供的柔性显示装置的俯视结构示意图。如图4所示，第一子拉伸层22包括：多个沿第一方向AB延伸的条状第一电极221，以及多个沿第二方向CD延伸的条状第一拉伸部222。第二方向CD与第一方向AB交叉。在一些实施例中，第二方向CD与第一方向AB基本垂直或垂直。第一拉伸部222与第一电极221在交叠区域电性连接。当在相邻两条第一电极221施加极性相反的第一电压时，第一子拉伸层22的第一拉伸部222沿第二方向CD拉伸，进而使电致形变层2可以沿第二方向CD进行拉伸，并带动整体柔性显示装置沿第二方向CD拉伸。
在一些实施例中，每一第一拉伸部222可以为一整体结构，例如，参见图4所示。在另一些实施例中，每一第一拉伸部222也可以为由多个相隔的子第一拉伸部构成的分立结构。例如，如图5所示，每一第一拉伸部222在与每一第一电极221交叠的区域设置有相应的第一隔断部223，其中，每个第一隔断部223在沿第一方向AB的宽度等于第一拉伸部222在沿第一方向AB的宽度，每个第一隔断部223在沿第二方向CD的宽度小于相应第一电极221在沿第二方向CD的宽度。每一第一拉伸部222在与第一电极交叠的区域设置有相应的第一隔断部223可以改善整条的第一拉伸部由于存在内应力较大而导致的拉伸效果不佳的问题。
尽管图5示出针对每一第一拉伸部222与每一第一电极221的每一交叠区域设置相应的第一隔断部223，但是本领域技术人员可以理解，各种变形均在本公开的范围内。例如，可以针对每一第一拉伸部222与选定的第一电极221(例如第2、4、6……个第一电极，或每隔若干个第一电极)的每一交叠区域设置第一隔断部223。
图6为根据本公开一些实施例提供的柔性显示装置的剖面结构示意图。如图6所示，电致形变层2还可以包括：设置在第一子拉伸层22的面向显示层3一面的第二子拉伸层23、以及设置在第二子拉伸层23与第一子拉伸层22之间的第一绝缘保护层(图中未示出)。
图7为根据本公开一些实施例提供的柔性显示装置的俯视结构示意图。如图7所示，第二子拉伸层23包括：多个沿第二方向CD延伸的条状第二电极231，以及多个沿第一方向AB延伸的条状第二拉伸部232。第二拉伸部232与第二电极231在交叠区域电性连接。当在相邻两条第二电极231施加极性相反的第二电压时，第二子拉伸层23的第二拉伸部232沿第一方向AB拉伸，进而使电致形变层2可以沿第一方向AB进行拉伸，并带动整体柔性显示装置沿第一方向AB拉伸。
在一些实施例中，每一第二拉伸部232可以为一整体结构，例如，参见图7所示。在另一些实施例中，每一第二拉伸部232也可以为由多个相隔的子第二拉伸部构成的分立结构。例如如图8所示，每一第二拉伸部232在与每一个第二电极231交叠的区域设置有相应的第二隔断部233。第二隔断部233在沿第二方向CD的宽度等于相应的第二拉伸部232在沿第二方向CD的宽度，第二隔断部233在沿第一方向AB的宽度小于相应的第二电极231在沿第一方向AB的宽度。每一第二拉伸部232在与第二电极231交叠的区域设置有相应的第二隔断部233可以改善整条的第二拉伸部由于存在内应力较大，而导致的拉伸效果不佳的问题。
尽管图8示出针对每一第二拉伸部232与每一第二电极231的每一交叠区域设置相应的第二隔断部233，但是本领域技术人员可以理解，各种变形均在本公开的范围内。例如，可以针对每一第二拉伸部232与选定的第二电极231(例如第2、4、6……个第二电极231，或每隔若干个第二电极231)的每一交叠区域设置第二隔断部233。
需要说明的是，第一拉伸部222和第二拉伸部232的材质可以为电致伸缩材料。在至少一个实施例中，第一电极221等间距均匀排列，第一拉伸部222等间距均匀排列。在至少一个实施例中，第二电极231等间距均匀排列，第二拉伸部232等间距均匀排列。在一些实施例中，第一方向可以为横向，第二方向可以为纵向。在另一些实施例中，第一方向可以为横向，第二方向可以为纵向。
图9为根据本公开一些实施例提供的柔性显示装置的剖面结构示意图。如图9所示，电致形变层2还可以包括：设置在衬底基板1之上且与衬底基板1接触的子弯曲层21。
图10根据为本公开一些实施例提供的柔性显示装置的俯视结构示意图。如图10所示，子弯曲层21包括：两条沿第三方向延伸的条状第三电极211、以及至少一条贴附在衬底基板1之上且沿第四方向延伸的条状弯曲条212。第四方向与第三方向交叉。在一些实施例中，第四方向与第三方向基本垂直或垂直。弯曲条212与第三电极211在交叠区域电性连接。当在两条第三电极211施加极性相反的第三电压时，弯曲条212以预设曲率进行弯曲。
在一些实施例中，子弯曲层21可以是和第一子拉伸层22位于不同的层。例如参见图9所示，第一子拉伸层22可以位于子弯曲层21之上，子弯曲层21与第一子拉伸层22之间还可以设置有第二绝缘保护层(图中未示出)。
在另一些实施例中，子弯曲层21和第一子拉伸层22可以位于相同的层。例如参见图11所示，第一子拉伸层22与子弯曲层21同层设置。第三方向与第一方向相同，第四方向与第二方向相同。柔性显示装置包括显示区41以及包围显示区41的非显示区42，其中第一电极221、第一拉伸部222均位于显示区41内，第三电极211以及弯曲条212均位于非显示区42，且两条第三电极211分别设置于非显示41区的相对的两侧。子弯曲层21和第一子拉伸层22同层设置时，可以薄化显示装置的结构，且使用一次性工艺可同时形成第一电极221和第三电极211。而且，考虑到相关技术的记忆合金一般拉伸性能不好，进而将第一电极221、第一拉伸部222设置在显示区41，将第三电极211和弯曲条212设置在非显示区42，可以防止弯曲条212影响显示区41的拉伸效果。
需要说明的是，对于本公开一些实施例中的弯曲条，其可以采用形状记忆合金(Shape Memory Alloys，SMA)，SMA是一种在加热升温后能完全消除其在较低的温度下发生的变形，恢复其变形前原始形状的合金材料，即拥有“记忆”效应的合金。在本公开一些实施例中，记忆合金选用的是具有双层记忆效应的材料，原始状态具有一定曲率形状，在较低温下(比如：40℃以下)材料是直的，通电加热后(如达到60℃)材料会变成曲面，当断电冷却后，材料又变成直的，由此原理就可以实现显示面板的曲面的控制。在至少一个实施例中，弯曲条的材质为TiNi记忆合金，其记忆效应优良，性能稳定。
另外，本公开一些实施例的柔性显示装置还可以包括与每一第一电极一一对应连接的第一电极引线，与第二电极一一对应连接的第二电极引线，以及与每一第三电极一一对应连接的第三电极引线，以及还可以设置驱动电致形变层的控制部件。该控制部件可以与第一电极引线、第二电极引线和/或第三电极引线连接，并可以向电致形变层发送不同的控制信号来向相邻的两条第一电极、相邻的两条第二电极和/或相邻的两条第三电极加极性相反的预设电压，进而使相邻的电极之间可以形成电场，使第一拉伸部、第二拉伸部和/或弯曲条在电场的作用下进行拉伸和/或弯曲，从而使得电致形变层发生变形。
例如，在一些实施例中，该柔性显示装置还包括与每一第一电极一一对应连接的第一电极引线和与第一电极引线连接的控制部。控制部被配置为经由第一电极引线向相邻的两条第一电极施加极性相反的所述第一电压。
在另一些实施例中，该柔性显示装置还包括与每一第一电极一一对应连接的第一电极引线，与每一第二电极一一对应连接的第二电极引线，和与第一电极引线和第二电极引线连接的控制部。控制部被配置为经由第一电极引线向相邻的两条第一电极施加极性相反的所述第一电压和经由第二电极引线向相邻的两条第二电极施加极性相反的所述第二电压。
在又一些实施例中，该柔性显示装置还包括与每一第一电极一一对应连接的第一电极引线，与每一第二电极一一对应连接的第二电极引线，与每一第三电极一一对应连接的第三电极引线和与第一电极引线、第二电极引线和第三电极引线连接的控制部。控制部被配置为经由第一电极引线向相邻的两条第一电极施加极性相反的所述第一电压，经由第二电极引线向相邻的两条第二电极施加极性相反的所述第二电压，和经由第三电极引线向相邻的两条第三电极施加极性相反的第三电压。
本公开一些实施例提供的柔性显示装置，在柔性衬底基板和显示层之间设置有电致 形变层，该电致形变层可在通电时产生形变，进而带动柔性衬底基板和显示层发生相应形变，使柔性显示装置可实现自动柔性显示，不需要通过外界施加外力以实现柔性显示，而且，柔性显示装置通过自身设置电致形变层实现的自动柔性显示，可改善相关技术的柔性显示装置在通过外界施加的力实现柔性显示时，由于施力不均匀导致的柔性显示效果不佳，以及容易恢复到原状态而产生的使用不方便的问题。
显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (13)

  1. 一种柔性显示装置，包括：
    柔性衬底基板，
    设置在所述柔性衬底基板之上的电致形变层，以及
    设置在所述电致形变层之上的显示层；
    其中，所述电致形变层被配置为：
    在通电时产生形变，进而带动所述柔性衬底基板和所述显示层产生相应形变，使所述柔性显示装置实现柔性显示，以及
    在断电时，恢复原状。
  2. 如权利要求1所述的柔性显示装置，其中，所述电致形变层包括第一子拉伸层；
    所述第一子拉伸层包括：多个沿第一方向延伸的条状第一电极，以及多个沿第二方向延伸的条状第一拉伸部，其中，所述第二方向与所述第一方向交叉，所述第一拉伸部与所述第一电极在交叠区域电性连接；
    当在相邻两条所述第一电极施加极性相反的第一电压时，所述第一子拉伸层的所述第一拉伸部沿所述第二方向拉伸。
  3. 如权利要求2所述的柔性显示装置，其中，在每一所述第一拉伸部与至少一个所述第一电极的所述交叠区域设置有第一隔断部，其中，所述第一隔断部在沿所述第一方向的宽度等于相应的第一拉伸部在沿所述第一方向的宽度，所述第一隔断部在沿所述第二方向的宽度小于相应的第一电极在沿所述第二方向的宽度。
  4. 如权利要求2所述的柔性显示装置，其中，所述电致形变层还包括：设置在所述第一子拉伸层的面向所述显示层一面的第二子拉伸层、以及设置在所述第二子拉伸层与所述第一子拉伸层之间的第一绝缘保护层；
    所述第二子拉伸层包括：多个沿所述第二方向延伸的条状第二电极，以及多个沿所述第一方向延伸的条状第二拉伸部，其中，所述第二拉伸部与所述第二电极在交叠区域电性连接；
    当在相邻两条所述第二电极施加极性相反的第二电压时，所述第二子拉伸层的所述第二拉伸部沿所述第一方向拉伸。
  5. 如权利要求4所述的柔性显示装置，其中，每一所述第二拉伸部在与至少一个所述第二电极交叠的区域设置有第二隔断部，其中，所述第二隔断部在沿所述第二方向的宽度等于相应的第二拉伸部在沿所述第二方向的宽度，所述第二隔断部在沿所述第一方向的宽度小于相应的第二电极在沿所述第一方向的宽度。
  6. 如权利要求4所述的柔性显示装置，其中，所述第一拉伸部和所述第二拉伸部的材质为电致伸缩材料。
  7. 如权利要求2-6中任一项所述的柔性显示装置，其中，所述电致形变层还包括：设置在所述衬底基板之上且与所述衬底基板接触的子弯曲层；
    所述子弯曲层包括：两条沿第三方向延伸的条状第三电极、以及至少一条贴附在所述衬底基板之上且沿第四方向延伸的条状弯曲条，所述第四方向与所述第三方向交叉，所述弯曲条与所述第三电极在交叠区域电性连接；
    当在两条所述第三电极施加极性相反的第三电压时，所述子弯曲层的所述弯曲条以预设曲率进行弯曲。
  8. 如权利要求7所述的柔性显示装置，其中，所述第一子拉伸层位于所述子弯曲层之上，所述子弯曲层与所述第一子拉伸层之间还设置有第二绝缘保护层。
  9. 如权利要求7所述的柔性显示装置，其中，所述第一子拉伸层与所述子弯曲层同层设置，所述第三方向与所述第一方向相同，所述第四方向与所述第二方向相同；
    所述柔性显示装置包括显示区以及包围所述显示区的非显示区，所述第一电极、所述第一拉伸部均位于所述显示区内，所述第三电极以及所述弯曲条均位于所述非显示区，且两条所述第三电极分别位于所述非显示区的相对的两侧。
  10. 如权利要求7所述的柔性显示装置，其中，所述弯曲条为TiNi记忆合金条。
  11. 如权利要求2或3所述的柔性显示装置，还包括：
    与每一第一电极一一对应连接的第一电极引线，和
    与第一电极引线连接的控制部，被配置为经由第一电极引线向相邻的两条第一电极施加极性相反的所述第一电压。
  12. 如权利要求4-6中任一项所述的柔性显示装置，还包括：
    与每一第一电极一一对应连接的第一电极引线，
    与每一第二电极一一对应连接的第二电极引线，和
    与第一电极引线和第二电极引线连接的控制部，被配置为经由第一电极引线向相邻的两条第一电极施加极性相反的所述第一电压和经由第二电极引线向相邻的两条第二电极施加极性相反的所述第二电压。
  13. 如权利要求7-10中任一项所述的柔性显示装置，还包括：
    与每一第一电极一一对应连接的第一电极引线，
    与每一第二电极一一对应连接的第二电极引线，
    与每一第三电极一一对应连接的第三电极引线，和
    与第一电极引线、第二电极引线和第三电极引线连接的控制部，被配置为经由第一电极引线向相邻的两条第一电极施加极性相反的所述第一电压，经由第二电极引线向相邻的两条第二电极施加极性相反的所述第二电压，和经由第三电极引线向相邻的两条第三电极施加极性相反的第三电压。
PCT/CN2018/091936 2017-06-26 2018-06-20 柔性显示装置 WO2019001313A1 (zh)

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