WO2020118959A1 - 柔性可折叠oled显示装置 - Google Patents

柔性可折叠oled显示装置 Download PDF

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Publication number
WO2020118959A1
WO2020118959A1 PCT/CN2019/078991 CN2019078991W WO2020118959A1 WO 2020118959 A1 WO2020118959 A1 WO 2020118959A1 CN 2019078991 W CN2019078991 W CN 2019078991W WO 2020118959 A1 WO2020118959 A1 WO 2020118959A1
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WIPO (PCT)
Prior art keywords
area
display device
transparent area
oled display
transparent
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PCT/CN2019/078991
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English (en)
French (fr)
Inventor
王磊
王硕晟
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to US16/603,259 priority Critical patent/US10897020B2/en
Publication of WO2020118959A1 publication Critical patent/WO2020118959A1/zh
Anticipated expiration legal-status Critical
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    • 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
    • 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
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • 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 invention relates to the field of display devices, in particular to a flexible foldable OLED display device.
  • OLEDs Organic light-emitting diodes
  • OLEDs have the advantages of self-emission, light and thin foldability, wide color gamut, and high contrast, and have attracted wide attention in the industry in display and lighting applications.
  • FIG. 1A is a schematic structural diagram of a conventional flexible foldable OLED display device after being folded. Please refer to FIG. 1A, a substrate 10 of a flexible and foldable OLED display device, a driving layer 11 disposed on the substrate 10, and an OLED light emitting layer 12 disposed on the driving layer 11.
  • FIG. 1B is a schematic diagram of the structure of a conventional flexible foldable OLED display device after being folded, please refer to FIG. 1B, when the OLED display device is bent, the OLED light emitting layer 12 is located inside, the driving layer 11 and the The substrate 10 is located outside, which makes the OLED light-emitting layer 12 blocked by the driving layer 11 and the substrate 10, and the display information of the OLED light-emitting layer 12 cannot be observed by the outside world.
  • the technical problem to be solved by the present invention is to provide a flexible foldable OLED display device, which can see the display information of the organic light-emitting layer without unfolding the flexible foldable OLED display device.
  • the present invention provides a flexible foldable OLED display device, which includes a flexible substrate, a driving layer and an organic light emitting layer, the driving layer is disposed on the flexible substrate, the organic A light emitting layer is provided on the driving layer, wherein the flexible substrate has a first transparent region, the driving layer has a second transparent region, and in a direction perpendicular to the organic light emitting layer, the first transparent
  • the orthographic projection of the area and the orthographic projection of the second transparent area have an overlapping area.
  • the overlapping area serves as a display area
  • the driving layer further includes A non-transparent area
  • the ratio of the area of the driving circuit of the second transparent area to the area of the organic light-emitting layer is smaller than the ratio of the area of the driving circuit of the non-transparent area to the area of the organic light-emitting layer
  • the One end of the non-transparent area has a groove recessed toward the center of the non-transparent area, and the second transparent area is disposed in the groove.
  • the flexible substrate is a transparent flexible substrate.
  • the overlapping area corresponds to the bending area of the flexible foldable OLED display device.
  • the first transparent area and the second transparent area all overlap.
  • the first transparent area partially overlaps the second transparent area.
  • the driving layer is a thin film transistor layer with multiple thin film transistors.
  • the present invention also provides a flexible foldable OLED display device, including a flexible substrate, a driving layer and an organic light emitting layer, the driving layer is provided on the flexible substrate, the organic A light emitting layer is provided on the driving layer, the flexible substrate has a first transparent area, the driving layer has a second transparent area, and in a direction perpendicular to the organic light emitting layer, the first transparent area The orthographic projection of and the orthographic projection of the second transparent area have an overlapping area. On the side of the flexible substrate facing away from the organic light-emitting layer, the overlapping area serves as a display area.
  • the flexible substrate is a transparent flexible substrate.
  • the driving layer further includes a non-transparent area, and the second transparent area is disposed at one end of the non-transparent area.
  • one end of the non-transparent area has a groove recessed toward the center of the non-transparent area, and the second transparent area is disposed in the groove.
  • the driving layer further includes a non-transparent area, and the non-transparent area surrounds the second transparent area.
  • the driving layer further includes a non-transparent area, and the ratio of the area of the driving circuit of the second transparent area to the area of the organic light-emitting layer is smaller than the area of the driving circuit of the non-transparent area. The ratio of the areas of the organic light emitting layer.
  • the overlapping area corresponds to the bending area of the flexible foldable OLED display device.
  • the first transparent area and the second transparent area all overlap.
  • the first transparent area partially overlaps the second transparent area.
  • the driving layer is a thin film transistor layer with multiple thin film transistors.
  • the advantage of the present invention is that when it is bent in the flexible foldable OLED display device, the information displayed on the organic light-emitting layer can be directly seen through the substrate and the driving layer, without the need to unfold the flexible foldable OLED display device. Ease of use for flexible foldable OLED display devices. Moreover, by designing display areas with different positions and shapes, the appearance and functions of the flexible and foldable OLED display device can be more diversified.
  • FIG. 1A is a schematic structural diagram of a conventional flexible foldable OLED display device after folding
  • FIG. 1B is a schematic structural diagram of a conventional flexible foldable OLED display device after folding
  • FIG. 2 is a schematic side view of the first embodiment of the flexible foldable OLED display device of the present invention.
  • FIG. 3 is a schematic diagram of the flexible foldable OLED display device shown in FIG. 2 after being folded;
  • FIG. 4 is a schematic structural plan view of the driving layer of the first embodiment of the flexible foldable OLED display device of the present invention.
  • FIG. 5 is a schematic cross-sectional view of a first embodiment of a flexible foldable OLED display device of the present invention.
  • FIG. 6 is a schematic structural plan view of the driving layer of the second embodiment of the flexible foldable OLED display device of the present invention.
  • FIG. 7 is a schematic structural plan view of the driving layer of the third embodiment of the flexible foldable OLED display device of the present invention.
  • FIG. 2 is a schematic diagram of a side view of the first embodiment of the flexible foldable OLED display device of the present invention
  • FIG. 3 is a schematic diagram of the flexible foldable OLED display device shown in FIG. 2 after being folded, please refer to FIGS. 2 and 3 for the present invention
  • the flexible foldable OLED display device includes a flexible substrate 20, a driving layer 30 and an organic light emitting layer 40.
  • the driving layer 30 is provided on the flexible substrate 20, and the organic light-emitting layer 40 is provided on the driving layer 30.
  • the flexible substrate 20 is made of a flexible material, for example, made of polyimide (PI).
  • the flexible substrate 20 has a first transparent area A1. In the first transparent area A1, the structure on the other side of the flexible substrate 20 can be observed through the flexible substrate 20, that is to say, In the first transparent area A1, the light emitted by the structure on the other side of the flexible substrate 20 can pass through the flexible substrate 20 and enter the observer's eyes.
  • the flexible substrate 20 further includes a first non-transparent area A2, and the first transparent area A1 and the first non-transparent area A2 are sequentially disposed.
  • the line of sight cannot see the structure on the other side of the flexible substrate 20 through the flexible substrate 20, that is, in the first non-transparent area A2, it is located in the The light emitted by the structure on the other side of the flexible substrate 20 cannot pass through the flexible substrate 20 and enter the observer's eyes.
  • the driving layer 30 has a second transparent area B1.
  • the line of sight can observe the structure on the other side of the driving layer 30 through the driving layer 30, that is, In the second transparent area B1, the light emitted by the structure on the other side of the driving layer 30 can pass through the driving layer 30 and enter the eyes of the observer.
  • FIG. 4 is a schematic top structural view of the driving layer 30 of the first embodiment of the flexible foldable OLED display device of the present invention. Please refer to FIGS. 2 and 4.
  • the driving layer 30 further includes a second In the transparent area B2, the second transparent area B1 is disposed at one end of the second non-transparent area B2.
  • the structure located on the other side of the driving layer 30 cannot be observed through the driving layer 30, that is, in the second non-transparent area B2, it is located in the driving
  • the light emitted by the structure on the other side of the layer 30 cannot pass through the driving layer 30 and enter the observer's eyes.
  • the orthographic projection of the first transparent area A1 and the orthographic projection of the second transparent area B1 have an overlapping area C.
  • the orthographic projection of the first transparent area A1 coincides with the orthographic projection of the second transparent area B1.
  • the area of the orthographic projection of the first transparent area A1 is larger than the area of the orthographic projection of the second transparent area B1, that is, the orthographic projection of the second transparent area B1 is transparent by the first Area A1 is covered by the orthographic projection.
  • the orthographic projection of the first transparent area A1 and the orthographic projection of the second transparent area B1 all coincide, that is, the first transparent area A1 and the second transparent area B1 are directly opposite Settings.
  • the overlapping area C serves as a display area.
  • the organic light-emitting layer 40 is located inside the flexible foldable OLED display device, and the flexible substrate The bottom 20 is located outside the flexible foldable OLED display device, and on the side of the flexible substrate 20, the display information of the organic light-emitting layer 40 in the overlapping area C can be seen.
  • the overlapping region C is located in the first transparent region A1 of the flexible substrate 20 and the second transparent region B1 of the driving layer 30, then in the overlapping region C, the organic light-emitting layer 40
  • the light can pass through the flexible substrate 20 and the driving layer 30 and enter the eyes of the observer, that is, the display information of the organic light-emitting layer 40 can be captured by the observer.
  • the overlapping area C can be used as a function area for displaying information.
  • the flexible foldable OLED display device can still display information such as time and message, without The user expands the flexible foldable OLED display device to improve the ease of use of the flexible foldable OLED display device.
  • the driving layer 30 is a thin film transistor layer.
  • the thin film transistor layer includes a plurality of thin film transistors 31.
  • 5 is a schematic cross-sectional view of a first embodiment of a flexible foldable OLED display device of the present invention. Please refer to FIGS. 2 and 5.
  • the second transparent region B1 includes a plurality of thin film transistors 31A
  • the second The non-transparent region B2 includes a plurality of thin film transistors 31B, wherein one thin film transistor 31A and four thin film transistors 31B are schematically shown in FIG. 5.
  • the thin film transistor 31 and the organic light emitting layer 40 are conventional structures in the art, and will not be described in detail.
  • the transparency of the driving layer 30 can be designed by changing the area ratio of the driving circuit of the driving layer 30 to the organic light emitting layer 40.
  • the thin film transistors 30 are all made of non-transparent materials, that is, the driving circuit of the driving layer is non-transparent, then reducing the area of the driving circuit can increase the light output area, then, in the production, the The ratio of the area of the driving circuit of the second transparent region B1 to the area of the organic light-emitting layer 40 is smaller than the ratio of the area of the driving circuit of the second non-transparent region B2 to the area of the organic light-emitting layer 40, The driving layer 30 forms the second transparent region B1.
  • the transparency of the driving layer 30 can also be designed by designing different thin film transistor structures. Specifically, different active layer materials are used for the thin film transistor 31A in the second transparent region B1 and the thin film transistor 31B in the second non-transparent region B2, wherein the thin film transistor in the second transparent region B1
  • the active layer of 31A uses transparent materials such as IGZO and AZO
  • the thin film transistor 31B of the second non-transparent region B2 uses non-transparent materials such as a-Si or LTPS.
  • the second transparent region B1 is formed on the driving layer 30.
  • FIG. 6 is a schematic structural plan view of the driving layer of the second embodiment of the flexible foldable OLED display device of the present invention.
  • the difference between the second embodiment and the first embodiment is that one end of the second non-transparent area B2 of the driving layer 30 has a center toward the center of the second non-transparent area B2 In the recessed groove 32, the second transparent region B1 is disposed in the groove 32. That is to say, the end of the second non-transparent area B2 is a special-shaped structure, and the second transparent area B1 is disposed at the gap of the special-shaped structure.
  • FIG. 7 is a schematic structural plan view of the driving layer of the third embodiment of the flexible foldable OLED display device of the present invention.
  • the difference between the third embodiment and the first embodiment is that the second non-transparent region B2 of the driving layer 30 surrounds the second transparent region B1. That is to say, the second transparent area B1 is located in the middle of the second non-transparent area B2, wherein, in this embodiment, the overlapping area C corresponds to the bending area of the flexible foldable OLED display device , You can achieve the purpose of displaying the bending area.

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
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  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种柔性可折叠OLED显示装置。在柔性可折叠OLED显示装置内弯折时，可透过衬底（20）及驱动层（30）直接看到有机发光层（40）上显示的信息，而不需要展开柔性可折叠OLED显示装置，提升了柔性可折叠OLED显示装置的易用性。且通过设计不同位置和形状的显示区，使柔性可折叠OLED显示装置的外观和功能更加多样化。

Description

柔性可折叠OLED显示装置 技术领域
本发明涉及显示装置领域，尤其涉及一种柔性可折叠OLED显示装置。
 背景技术
有机发光二极管（OLED）具有自发光、轻薄可折叠、色域广、对比度高的优点，在显示和照明等应用领域引起了业界广泛的关注。
柔性可折叠是OLED显示装置区别于液晶显示装置（LCD）的重要特点。柔性可折叠的OLED显示装置的外形设计具有极大的自由度，也扩展了显示设备的使用场景，同时还增加了显示设备的便携性。图1A是现有的柔性可折叠的OLED显示装置折叠后的结构示意图。请参阅图1A，柔性可折叠的OLED显示装置一衬底10、置于衬底10上的驱动层11及置于所述驱动层11上OLED发光层12。
 技术问题
图1B是现有的柔性可折叠的OLED显示装置折叠后的结构示意图，请参阅图1B，当OLED显示装置内弯折后，所述OLED发光层12位于内部、所述驱动层11及所述衬底10位于外部，这使得所述OLED发光层12被所述驱动层11及所述衬底10遮挡，所述OLED发光层12的显示信息无法被外界观测。
 技术解决方案
本发明所要解决的技术问题是，提供一种柔性可折叠OLED显示装置，其能够不需要展开柔性可折叠OLED显示装置即可看到有机发光层的显示信息。
为了解决上述问题，本发明提供了一种柔性可折叠OLED显示装置，其包括一柔性衬底、一驱动层及一有机发光层，所述驱动层设置在所述柔性衬底上，所述有机发光层设置在所述驱动层上，其中所述柔性衬底具有一第一透明区，所述驱动层具有一第二透明区，在垂直所述有机发光层的方向上，所述第一透明区的正投影与所述第二透明区的正投影具有一重叠区，在所述柔性衬底背离所述有机发光层的一侧，所述重叠区作为一显示区，所述驱动层还包括一非透明区，所述第二透明区的驱动电路的面积与所述有机发光层的面积的比值小于所述非透明区的驱动电路的面积与所述有机发光层的面积的比值，所述非透明区的一端具有一向所述非透明区的中心凹陷的凹槽，所述第二透明区设置在所述凹槽内。
在一实施例中，所述柔性衬底为一透明柔性衬底。
在一实施例中，所述重叠区对应所述柔性可折叠OLED显示装置的弯折区设置。
在一实施例中，所述第一透明区与所述第二透明区全部重叠。
在一实施例中，所述第一透明区与所述第二透明区部分重叠。
在一实施例中，所述驱动层为一具有多个薄膜晶体管的薄膜晶体管层。
为了解决上述问题，本发明还提供了一种柔性可折叠OLED显示装置，包括一柔性衬底、一驱动层及一有机发光层，所述驱动层设置在所述柔性衬底上，所述有机发光层设置在所述驱动层上，所述柔性衬底具有一第一透明区，所述驱动层具有一第二透明区，在垂直所述有机发光层的方向上，所述第一透明区的正投影与所述第二透明区的正投影具有一重叠区，在所述柔性衬底背离所述有机发光层的一侧，所述重叠区作为一显示区。
在一实施例中，所述柔性衬底为一透明柔性衬底。
在一实施例中，所述驱动层还包括一非透明区，所述第二透明区设置在所述非透明区的一端。
在一实施例中，所述非透明区的一端具有一向所述非透明区的中心凹陷的凹槽，所述第二透明区设置在所述凹槽内。
在一实施例中，所述驱动层还包括一非透明区，所述非透明区包围所述第二透明区。
在一实施例中，所述驱动层还包括一非透明区，所述第二透明区的驱动电路的面积与所述有机发光层的面积的比值小于所述非透明区的驱动电路的面积与所述有机发光层的面积的比值。
在一实施例中，所述重叠区对应所述柔性可折叠OLED显示装置的弯折区设置。
在一实施例中，所述第一透明区与所述第二透明区全部重叠。
在一实施例中，所述第一透明区与所述第二透明区部分重叠。
在一实施例中，所述驱动层为一具有多个薄膜晶体管的薄膜晶体管层。
 有益效果
本发明的优点在于，在柔性可折叠OLED显示装置内弯折时，可以透过衬底及驱动层直接看到有机发光层上显示的信息，而不需要展开柔性可折叠OLED显示装置，提升了柔性可折叠OLED显示装置的易用性。并且，通过设计不同位置和形状的显示区，能够使可柔性可折叠OLED显示装置的外观和功能更加多样化。
 附图说明
图1A是现有的柔性可折叠的OLED显示装置折叠后的结构示意图；
图1B是现有的柔性可折叠的OLED显示装置折叠后的结构示意图；
图2是本发明柔性可折叠OLED显示装置的第一实施例的侧视结构示意图；
图3是图2所示柔性可折叠OLED显示装置折叠后的示意图；
图4是本发明柔性可折叠OLED显示装置的第一实施例的驱动层的俯视结构示意图；
图5是本发明柔性可折叠OLED显示装置的第一实施例的截面示意图；
图6是本发明柔性可折叠OLED显示装置的第二实施例的驱动层的俯视结构示意图；
图7是本发明柔性可折叠OLED显示装置的第三实施例的驱动层的俯视结构示意图。
 本发明的实施方式
下面结合附图对本发明提供的柔性可折叠OLED显示装置的具体实施方式做详细说明。
图2是本发明柔性可折叠OLED显示装置的第一实施例的侧视结构示意图，图3是图2所示柔性可折叠OLED显示装置折叠后的示意图，请参阅图2及图3，本发明柔性可折叠OLED显示装置包括一柔性衬底20、一驱动层30及一有机发光层40。所述驱动层30设置在所述柔性衬底20上，所述有机发光层40设置在所述驱动层30上。
所述柔性衬底20采用柔性材料制成，例如，采用聚酰亚胺（PI）制成。所述柔性衬底20具有一第一透明区A1，在所述第一透明区A1，视线可透过所述柔性衬底20观察到位于所述柔性衬底20另一面的结构，也就是说，在所述第一透明区A1，位于所述柔性衬底20另一面的结构发出的光线能够透过所述柔性衬底20而进入观察者的眼睛。在本实施例中，所述柔性衬底20还包括一第一非透明区A2，所述第一透明区A1与所述第一非透明区A2依次设置。在所述第一非透明区A2，视线透过所述柔性衬底20不能观察到位于所述柔性衬底20另一面的结构，也就是说，在所述第一非透明区A2，位于所述柔性衬底20另一面的结构发出的光线不能够透过所述柔性衬底20进入观察者的眼睛。
所述驱动层30具有一第二透明区B1，在所述第二透明区B1，视线可透过所述驱动层30观察到位于所述驱动层30另一面的结构，也就是说，在所述第二透明区B1，位于所述驱动层30另一面的结构发出的光线能够透过所述驱动层30而进入观察者的眼睛。图4是本发明柔性可折叠OLED显示装置的第一实施例的驱动层30的俯视结构示意图，请参阅图2及图4，在本实施例中，所述驱动层30还包括一第二非透明区B2，所述第二透明区B1设置在所述第二非透明区B2的一端。在所述第二非透明区B2，视线透过所述驱动层30不能观察到位于所述驱动层30另一面的结构，也就是说，在所述第二非透明区B2，位于所述驱动层30另一面的结构发出的光线不能够透过所述驱动层30进入观察者的眼睛。
在垂直所述有机发光层40的方向上，所述第一透明区A1的正投影与所述第二透明区B1的正投影具有一重叠区C。具体地说，请参阅图2，在Y方向上，所述第一透明区A1的正投影与所述第二透明区B1的正投影具有一重叠区C。在本实施例中，所述第一透明区A1的正投影与所述第二透明区B1的正投影部分重合。具体地说，所述第一透明区A1的正投影的面积大于所述第二透明区B1的正投影的面积，也就是说，所述第二透明区B1的正投影被所述第一透明区A1的正投影覆盖。在本发明其他实施例中，所述第一透明区A1的正投影与所述第二透明区B1的正投影全部重合，即所述第一透明区A1与所述第二透明区B1正对设置。
在所述柔性衬底20背离所述有机发光层40的一侧，所述重叠区C作为一显示区。具体地说，当所述柔性可折叠OLED显示装置向内弯折，形成如图3所示的结构时，所述有机发光层40位于所述柔性可折叠OLED显示装置的内部，所述柔性衬底20位于所述柔性可折叠OLED显示装置的外部，则在所述柔性衬底20侧，在所述重叠区C能够看到该区域的有机发光层40的显示信息。其原因在于，所述重叠区C位于所述柔性衬底20的第一透明区A1及所述驱动层30的第二透明区B1，则在所述重叠区C，所述有机发光层40的光线能够穿过所述柔性衬底20及驱动层30而进入观察者眼睛，即有机发光层40的显示信息能够被观察者捕捉。本发明柔性可折叠OLED显示装置在内弯折后，所述重叠区C可作为显示信息的功能区，在内弯折状态时，柔性可折叠OLED显示装置仍然可以显示时间、消息等信息，无需用户将柔性可折叠OLED显示装置展开，提高柔性可折叠OLED显示装置的易用性。
进一步，在本实施例中，所述驱动层30为一薄膜晶体管层。所述薄膜晶体管层包括多个薄膜晶体管31。图5是本发明柔性可折叠OLED显示装置的第一实施例的截面示意图，请参阅图2及图5，具体地说，所述第二透明区B1包括多个薄膜晶体管31A，所述第二非透明区B2包括多个薄膜晶体管31B，其中，图5中示意性绘示一个薄膜晶体管31A及四个薄膜晶体管31B。所述薄膜晶体管31及有机发光层40均为本领域常规结构，不再赘述。
其中，可以通过改变所述驱动层30的驱动电路与有机发光层40的面积比来设计所述驱动层30的透明度。具体地说，如果薄膜晶体管30均采用非透明的材料制备，即所述驱动层的驱动电路是非透明的，则减小驱动电路的面积可以增大出光面积，那么，在制作时，可以使位于所述第二透明区B1的驱动电路的面积与有机发光层40的面积的比值小于位于所述第二非透明区B2的驱动电路的面积与有机发光层40的面积的比值，从而在所述驱动层30形成所述第二透明区B1。
另外，还可以通过设计不同的薄膜晶体管的结构来设计所述驱动层30的透明度。具体地说，在所述第二透明区B1的薄膜晶体管31A及所述第二非透明区B2的薄膜晶体管31B使用不同的有源层材料，其中，在所述第二透明区B1的薄膜晶体管31A的有源层使用IGZO、AZO等透明材料，所述第二非透明区B2的薄膜晶体管31B使用a-Si或者LTPS等非透明材料。从而在所述驱动层30形成所述第二透明区B1。
图6是本发明柔性可折叠OLED显示装置的第二实施例的驱动层的俯视结构示意图。请参阅图6，所述第二实施例与所述第一实施例的区别在于，所述驱动层30的所述第二非透明区B2的一端具有一向所述第二非透明区B2的中心凹陷的凹槽32，所述第二透明区B1设置在所述凹槽32内。也就是说，所述第二非透明区B2的该端为异形结构，所述第二透明区B1设置在该异形结构的空隙处。
图7是本发明柔性可折叠OLED显示装置的第三实施例的驱动层的俯视结构示意图。请参阅图7，所述第三实施例与所述第一实施例的区别在于，所述驱动层30的所述第二非透明区B2包围所述第二透明区B1。也就是说，所述第二透明区B1位于所述第二非透明区B2的中部，其中，在本实施例中，所述重叠区C对应所述柔性可折叠OLED显示装置的弯折区设置，则可达到弯折区显示的目的。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。
 工业实用性
本申请的主题可以在工业中制造和使用，具备工业实用性。

Claims (16)

  1. 一种柔性可折叠OLED显示装置，其包括一柔性衬底、一驱动层及一有机发光层，所述驱动层设置在所述柔性衬底上，所述有机发光层设置在所述驱动层上，其中所述柔性衬底具有一第一透明区，所述驱动层具有一第二透明区，在垂直所述有机发光层的方向上，所述第一透明区的正投影与所述第二透明区的正投影具有一重叠区，在所述柔性衬底背离所述有机发光层的一侧，所述重叠区作为一显示区，所述驱动层还包括一非透明区，所述第二透明区的驱动电路的面积与所述有机发光层的面积的比值小于所述非透明区的驱动电路的面积与所述有机发光层的面积的比值，所述非透明区的一端具有一向所述非透明区的中心凹陷的凹槽，所述第二透明区设置在所述凹槽内。
  2. 根据权利要求1所述的柔性可折叠OLED显示装置，其中所述柔性衬底为一透明柔性衬底。
  3. 根据权利要求1所述的柔性可折叠OLED显示装置，其中所述重叠区对应所述柔性可折叠OLED显示装置的弯折区设置。
  4. 根据权利要求1所述的柔性可折叠OLED显示装置，其中所述第一透明区与所述第二透明区全部重叠。
  5. 根据权利要求1所述的柔性可折叠OLED显示装置，其中所述第一透明区与所述第二透明区部分重叠。
  6. 根据权利要求1所述的柔性可折叠OLED显示装置，其中所述驱动层为一具有多个薄膜晶体管的薄膜晶体管层。
  7. 一种柔性可折叠OLED显示装置，其包括一柔性衬底、一驱动层及一有机发光层，所述驱动层设置在所述柔性衬底上，所述有机发光层设置在所述驱动层上，其中所述柔性衬底具有一第一透明区，所述驱动层具有一第二透明区，在垂直所述有机发光层的方向上，所述第一透明区的正投影与所述第二透明区的正投影具有一重叠区，在所述柔性衬底背离所述有机发光层的一侧，所述重叠区作为一显示区。
  8. 根据权利要求7所述的柔性可折叠OLED显示装置，其中所述柔性衬底为一透明柔性衬底。
  9. 根据权利要求7所述的柔性可折叠OLED显示装置，其中所述驱动层还包括一非透明区，所述第二透明区设置在所述非透明区的一端。
  10. 根据权利要求9所述的柔性可折叠OLED显示装置，其特征在于，所述非透明区的一端具有一向所述非透明区的中心凹陷的凹槽，所述第二透明区设置在所述凹槽内。
  11. 根据权利要求7所述的柔性可折叠OLED显示装置，其中所述驱动层还包括一非透明区，所述非透明区包围所述第二透明区。
  12. 根据权利要求7所述的柔性可折叠OLED显示装置，其中所述驱动层还包括一非透明区，所述第二透明区的驱动电路的面积与所述有机发光层的面积的比值小于所述非透明区的驱动电路的面积与所述有机发光层的面积的比值。
  13. 根据权利要求7所述的柔性可折叠OLED显示装置，其中所述重叠区对应所述柔性可折叠OLED显示装置的弯折区设置。
  14. 根据权利要求7所述的柔性可折叠OLED显示装置，其中所述第一透明区与所述第二透明区全部重叠。
  15. 根据权利要求7所述的柔性可折叠OLED显示装置，其中所述第一透明区与所述第二透明区部分重叠。
  16. 根据权利要求7所述的柔性可折叠OLED显示装置，其中所述驱动层为一具有多个薄膜晶体管的薄膜晶体管层。
PCT/CN2019/078991 2018-12-13 2019-03-21 柔性可折叠oled显示装置 Ceased WO2020118959A1 (zh)

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