WO2020124886A1 - 可折叠oled显示面板 - Google Patents

可折叠oled显示面板 Download PDF

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Publication number
WO2020124886A1
WO2020124886A1 PCT/CN2019/082274 CN2019082274W WO2020124886A1 WO 2020124886 A1 WO2020124886 A1 WO 2020124886A1 CN 2019082274 W CN2019082274 W CN 2019082274W WO 2020124886 A1 WO2020124886 A1 WO 2020124886A1
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Prior art keywords
sub
display panel
spacer
pixel
pixels
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PCT/CN2019/082274
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English (en)
French (fr)
Inventor
赵瑾荣
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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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Application filed by Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to US16/473,179 priority Critical patent/US11222927B2/en
Publication of WO2020124886A1 publication Critical patent/WO2020124886A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • 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
    • 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
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
    • 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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/352—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels the areas of the RGB subpixels being different
    • 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 application relates to a display technology, in particular to a foldable organic light emitting diode (organic light emitting diode, OLED) display panel.
  • OLED organic light emitting diode
  • Flexible display screens have the advantages of being thin, small, small in power consumption, high in portability, etc. with the characteristics of being freely bendable, foldable and stretchable, and have the prospect of wide application.
  • flexible display technology whether it is foldable or stretchable, or any bend, flexible display technology is a technological innovation.
  • the bending axis is fixed. As shown in FIG. 1A, the bending axis A1 of the display product folded in half is the middle area of the display screen. As shown in FIG. 1B, the bending axes B1 and B2 of the three-fold display product are 1/3 and 2/3 of the display screen, respectively.
  • the bending radius is about 5mm or 3mm.
  • FIG. 2 shows a schematic diagram of an existing foldable OLED display panel.
  • the existing foldable OLED display panel includes a red sub-pixel 101, a blue sub-pixel 102, and a green sub-pixel 103.
  • Spacers 110 are distributed between the sub-pixels 101, 102, and 103. The spacers 110 are used to provide support between the film layers, so that gaps are formed between the film layers.
  • the display area or active area active thin film transistors in the bending area and non-bending area in the area, AA
  • the transistor (TFT) structure is basically the same as the film structure.
  • the spacers 110 in the bending area and the non-bending area in the display area are both small squares, and are evenly distributed in the display area at the same density.
  • each film layer of the TFT in the bending area has to withstand the effects of external tension and pressure more than the non-bending area. After multiple foldings, the stress distribution of the sub-pixels in the bending area is not uniform, so that the display device in the bending area is easily deteriorated, which affects the reliability of the display panel.
  • the purpose of the present application is to provide a foldable OLED display panel, so as to solve the problem of uneven stress distribution of sub-pixels in the bending area of the existing foldable display panel.
  • the present application provides a foldable OLED display panel
  • the display panel includes a bending region and a non-bending region, when the display panel is folded, the bending region forms a curved surface, the display When the panel is not folded, the bending area and the non-bending area are flat, and the display panel includes:
  • a plurality of sub-pixels formed in the bent region and the non-bent region, all or part of the sub-pixels of the plurality of sub-pixels have self-luminous characteristics
  • the first spacer is used to provide support and form a gap.
  • the first spacer is disposed in the bending region and is distributed in a mesh shape, surrounding the plurality of sub-pixels.
  • the first spacer surrounds each sub-pixel in the bending region.
  • the plurality of sub-pixels include a red sub-pixel, a blue sub-pixel, and a green sub-pixel, and the first spacer is provided between the red sub-pixel and the blue sub-pixel. Between the red sub-pixel and the green sub-pixel and between the blue sub-pixel and the green sub-pixel.
  • the first spacer is composed of straight line segments distributed in a mesh shape.
  • the first spacer is composed of a curved line segment distributed in a mesh shape.
  • the display panel further includes:
  • a plurality of second spacers for providing support and forming a gap the plurality of second spacers are provided in the non-bending area, and each of the plurality of second spacers corresponds to a predetermined number of The sub-pixel.
  • the materials of the first spacer and the plurality of second spacers are the same.
  • the first spacer includes a photosensitive spacer.
  • the material of the first spacer is an organic photoresist.
  • the display panel includes a bent region and a non-bent region.
  • the bent region forms a curved surface, and when the display panel is not folded ,
  • the bending area and the non-bending area are planar, including:
  • a plurality of sub-pixels formed in the bent region and the non-bent region, all or part of the sub-pixels of the plurality of sub-pixels have self-luminous characteristics
  • a first spacer for providing support and forming a gap, the first spacer is provided in the bending area;
  • a plurality of second spacers for providing support and forming voids, the plurality of second spacers are provided in the non-bending area,
  • Each of the plurality of second spacers corresponds to a predetermined number of the sub-pixels, and the first spacers are distributed in a mesh shape and surround each of the sub-pixels in the bending region.
  • the plurality of sub-pixels include a red sub-pixel, a blue sub-pixel, and a green sub-pixel, and the first spacer is provided between the red sub-pixel and the blue sub-pixel. Between the red sub-pixel and the green sub-pixel and between the blue sub-pixel and the green sub-pixel.
  • the first spacer is composed of straight line segments distributed in a mesh shape.
  • the first spacer is composed of a curved line segment distributed in a mesh shape.
  • the materials of the first spacer and the plurality of second spacers are the same.
  • the first spacer includes a photosensitive spacer.
  • the material of the first spacer is an organic photoresist.
  • the display panel is divided into a non-bending area and a bending area, and the spacers in the bending area are distributed in a mesh shape, surrounding the sub-pixels (such as red, blue, and green sub-pixels) Pixels).
  • the sub-pixels such as red, blue, and green sub-pixels
  • the surrounding sub-pixels can be protected, the problem of uneven stress distribution of each sub-pixel can be effectively avoided, and the overall ability of the sub-pixels in the bending area to withstand stress during the bending process can be enhanced to ensure The reliability of the display panel.
  • FIG. 1A shows a schematic diagram of a conventional folding display product.
  • FIG. 1B shows a schematic diagram of an existing three-fold display product.
  • FIG. 2 shows a schematic diagram of an existing foldable OLED display panel.
  • FIG. 3 shows a schematic diagram of a foldable OLED display panel according to the first embodiment of the present application.
  • FIG. 4 shows a schematic diagram of a foldable OLED display panel according to the second embodiment of the present application.
  • FIG. 3 shows a foldable organic light emitting diode (organic) according to the first embodiment of the present application light emitting diode, OLED) schematic diagram of a display panel.
  • the foldable OLED display panel includes a non-bending area 10 and a non-bending area 20.
  • the display panel can be folded along the non-bending area 20.
  • the bending area 20 forms a curved surface.
  • the bending area 20 and the non-bending area 10 are flat.
  • the display panel may be a double-folding display panel, a three-folding display panel, or other types of foldable OLED display panels.
  • the display panel includes multiple sub-pixels, such as a red sub-pixel 201, a blue sub-pixel 202, and a green sub-pixel 203 as shown in FIG.
  • Adjacent sub-pixels 201, 202, and 203 are separated from each other by a predetermined distance.
  • the sub-pixels of each color are evenly distributed on the display panel.
  • the sub-pixels 201, 202, and 203 are formed in the bent region 20 and the non-bent region 10. All or part of these sub-pixels 201, 202, and 203 have self-luminous characteristics.
  • each sub-pixel 201, 202, and 203 corresponds to an OLED light-emitting device.
  • a sub-pixel of a certain color corresponds to an OLED light-emitting device, and sub-pixels of other colors are excited and formed by the OLED light-emitting device.
  • the display panel includes a first spacer 210 disposed in the bending area 20.
  • the first spacer 210 is used to provide support and form a gap.
  • the first spacer 210 is used to provide support between the film layers, so that gaps are formed between the film layers.
  • the first spacer 210 may be provided on a thin film transistor (thin A film transistor (TFT) array substrate and a color filter (CF) substrate are used to form a gap between the TFT array substrate and the CF substrate.
  • the first spacer 210 may be disposed between the OLED substrate and the thin film encapsulation structure that blocks water and oxygen from entering, for forming a gap between the OLED substrate and the thin film encapsulation structure.
  • the first spacer 210 may include a photosensitive spacer whose material is an organic photoresist.
  • the first spacer 210 may be made of organic photoresist materials such as DL-1000 or DL-1001C, and may be made by a general photolithography process or a half-tone process.
  • the first spacers 210 provided in the bending region 20 are distributed in a mesh shape and surround the plurality of sub-pixels 201, 202, and 203.
  • the first spacer 210 is composed of straight line segments distributed in a mesh shape.
  • the first spacer 210 surrounds each sub-pixel in the bending region 20.
  • the first spacer 210 is provided between the red subpixel 201 and the blue subpixel 202, between the red subpixel 201 and the green subpixel 203, and between the blue subpixel 202 and the green subpixel 203.
  • the first spacer 210 surrounds the sub-pixels in the bending region 20, the first spacer 210 is evenly distributed, and the thickness and the pattern are the same. In the folding process, the external or internal stress can be well dispersed to avoid large stress Concentrating on a certain sub-pixel causes its failure.
  • the display panel may further include a plurality of second spacers 220 provided in the non-bent area 10, and each of the plurality of second spacers 220 corresponds to a predetermined number of sub-pixels, for example, each The second spacer 220 is a small square (12*12um), and a second spacer 220 is distributed in every 8 sub-pixels, with a distribution density of 0.35%.
  • the plurality of second spacers 220 are used to provide support and form gaps, specifically to provide support between the film layers, so as to form gaps between the film layers.
  • the plurality of second spacers 220 may be made of the same material as the first spacers 210 under the same manufacturing process.
  • the plurality of second spacers 220 and the first spacers 210 are all organic photoresists, and are manufactured by a general photolithography process or a half-tone process under the same process.
  • the plurality of second spacers 220 and the first spacers 210 are manufactured at the same time, no additional mask is required, and only the existing masks need to be changed.
  • FIG. 4 shows a schematic diagram of a foldable OLED display panel according to the second embodiment of the present application.
  • the difference between the second embodiment of the present application and the first embodiment is that, in the second embodiment of the present application, the display panel includes a first spacer 310, and the first spacer 310 is a bent type distributed in a mesh shape Line segment composition.
  • the second spacer 310 in the second embodiment of the present application which is composed of bent line segments distributed in a mesh shape, can better buffer and release stress.
  • the display panel is divided into a non-bent area and a bent area, and the spacers in the bent area are distributed in a mesh shape and surround the sub-pixels (Such as red, blue, and green subpixels).
  • the sub-pixels Spo as red, blue, and green subpixels.
  • the surrounding sub-pixels can be protected, the problem of uneven stress distribution of each sub-pixel can be effectively avoided, and the overall ability of the sub-pixels in the bending area to withstand stress during the bending process can be enhanced to ensure The reliability of the display panel.

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

Abstract

一种可折叠OLED显示面板，所述显示面板包括弯折区域及非弯折区域，并包括：多个子像素，形成于弯折区域和非弯折区域中，多个子像素的全部或部分子像素具有自发光特性；以及第一间隔物，用以提供支撑并使得空隙形成，第一间隔物设于弯折区域，且呈网状分布，环绕着多个子像素。所述显示面板可增强弯折区域中的子像素在弯折过程中承受应力的整体能力，确保显示面板的可靠性。

Description

可折叠OLED显示面板 技术领域
本申请涉及一种显示技术，特别涉及一种可折叠有机发光二极管（organic light emitting diode, OLED）显示面板。
 背景技术
柔性显示屏凭借着可随意弯曲、折叠及拉伸等特性，并且具有轻薄、体积小、功耗低及可携性能高等优势，具备广泛应用之前景。对于显示技术领域来说，无论是可折叠还是可拉伸，或者是任意弯曲，柔性显示技术都是一场技术革新。
目前的动态折叠显示产品中，弯折轴线固定。如图1A所示，对折的显示产品的弯折轴线A1为显示屏的中间区域。如图1B所示，三折显示产品的弯折轴线B1、B2分别为显示屏的1/3和2/3处。弯折半径约在5mm或3mm。
图2显示一种现有的可折叠OLED显示面板的示意图。如图2所示，现有的可折叠OLED显示面板中包括红色子像素101、蓝色子像素102及绿色子像素103。在这些子像素101、102及103间分布有间隔物110，间隔物110用以提供膜层间的支撑，使得膜层间形成空隙。
现有的可折叠OLED显示面板中，显示区域或主动区域（active area, AA）中的弯折区域和非弯折区域的薄膜晶体管（thin film transistor, TFT）结构和膜层结构基本上一样。显示区域中弯折区域和非弯折区域的间隔物110均为小方形，按相同的密度均匀地分布在显示区域内。
但是，显示面板在实际折叠过程中，弯折区域中TFT各膜层要承受来自外部拉力和压力的作用比非弯折区域要大得多。经多次折叠后，弯折区域内的子像素应力分配不均匀，使得弯折区域内的显示器件容易劣化，而影响显示面板的可靠性。
 技术问题
本申请的目的在于提供一种可折叠OLED显示面板，以解决现有的可折叠显示面板中弯折区域的子像素应力分配不均匀的问题。
 技术解决方案
为实现上述目的，本申请一方面提供一种可折叠OLED显示面板，所述显示面板包括弯折区域及非弯折区域，所述显示面板折叠时，所述弯折区域形成曲面，所述显示面板不折叠时，所述弯折区域和所述非弯折区域为平面，所述显示面板包括：
多个子像素，形成于所述弯折区域和所述非弯折区域中，所述多个子像素的全部或部分子像素具有自发光特性；以及
第一间隔物，用以提供支撑并使得空隙形成，所述第一间隔物设于所述弯折区域，且呈网状分布，环绕着所述多个子像素。
本申请实施例中，所述第一间隔物环绕所述弯折区域中的每一个子像素。
本申请实施例中，所述多个子像素包括红色子像素、蓝色子像素及绿色子像素，所述第一间隔物设于所述红色子像素和所述蓝色子像素之间、所述红色子像素和所述绿色子像素之间以及所述蓝色子像素和所述绿色子像素之间。
本申请实施例中，所述第一间隔物由呈网状分布的直线线段构成。
本申请实施例中，所述第一间隔物由呈网状分布的折曲型线段构成。
本申请实施例中，所述显示面板还包括：
多个第二间隔物，用以提供支撑并使得空隙形成，所述多个第二间隔物设于所述非弯折区域，所述多个第二间隔物中的每一个对应一预定数目的所述子像素。
本申请实施例中，所述第一间隔物和所述多个第二间隔物的材料相同。
本申请实施例中，所述第一间隔物包括感光型间隔物。
本申请实施例中，所述第一间隔物的材料为有机光阻。
本申请另一方面提供一种可折叠OLED显示面板，所述显示面板包括弯折区域及非弯折区域，所述显示面板折叠时，所述弯折区域形成曲面，所述显示面板不折叠时，所述弯折区域和所述非弯折区域为平面，包括：
多个子像素，形成于所述弯折区域和所述非弯折区域中，所述多个子像素的全部或部分子像素具有自发光特性；
第一间隔物，用以提供支撑并使得空隙形成，所述第一间隔物设于所述弯折区域；以及
多个第二间隔物，用以提供支撑并使得空隙形成，所述多个第二间隔物设于所述非弯折区域，
其中所述多个第二间隔物中的每一个对应一预定数目的所述子像素，所述第一间隔物呈网状分布，并环绕所述弯折区域中的每一个所述子像素。
本申请实施例中，所述多个子像素包括红色子像素、蓝色子像素及绿色子像素，所述第一间隔物设于所述红色子像素和所述蓝色子像素之间、所述红色子像素和所述绿色子像素之间以及所述蓝色子像素和所述绿色子像素之间。
本申请实施例中，所述第一间隔物由呈网状分布的直线线段构成。
本申请实施例中，所述第一间隔物由呈网状分布的折曲型线段构成。
本申请实施例中，所述第一间隔物和所述多个第二间隔物的材料相同。
本申请实施例中，所述第一间隔物包括感光型间隔物。
本申请实施例中，所述第一间隔物的材料为有机光阻。
 有益效果
本申请的可折叠OLED显示面板中，所述显示面板分为非弯折区域和弯折区域，弯折区域中的间隔物为网状分布，环绕着子像素（如红色、蓝色和绿色子像素）。通过这种网状的间隔物，可以保护被围绕起来的子像素，有效避免各子像素应力分配不均匀的问题，增强弯折区域中的子像素在弯折过程中承受应力的整体能力，确保显示面板的可靠性。
 附图说明
图1A显示一种现有的对折式显示产品的示意图。
图1B显示一种现有的三折式显示产品的示意图。
图2显示一种现有的可折叠OLED显示面板的示意图。
图3显示根据本申请第一实施例的一种可折叠OLED显示面板的示意图。
图4显示根据本申请第二实施例的一种可折叠OLED显示面板的示意图。
 本发明的实施方式
为使本申请的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本申请进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，本申请说明书所使用的词语“实施例”意指用作实例、示例或例证，并不用于限定本申请。
图3显示根据本申请第一实施例的一种可折叠有机发光二极管（organic light emitting diode, OLED）显示面板的示意图。如图3所示，所述可折叠OLED显示面板包括非弯折区域10及非弯折区域20。所述显示面板可沿着非弯折区域20进行折叠。所述显示面板折叠时，弯折区域20形成曲面。所述显示面板不折叠时，弯折区域20和非弯折区域10为平面。所述显示面板可为对折式显示面板、三折式显示面板或其他类型的可折叠OLED显示面板。
所述显示面板包括多个子像素，如图3中所示的红色子像素201、蓝色子像素202及绿色子像素203。相邻的子像素201、202及203彼此以预定的距离隔开。每一种颜色的子像素在显示面板上均匀分布。子像素201、202及203均形成于弯折区域20和非弯折区域10。这些子像素201、202及203的全部或部分子像素具有自发光特性。例如，每一个子像素201、202及203都对应一个OLED发光器件。又如，某一种颜色的子像素对应一个OLED发光器件，其他颜色的子像素由所述OLED发光器件激发形成。
所述显示面板包括第一间隔物210，设于弯折区域20。第一间隔物210用以提供支撑并使得空隙形成。具体地，第一间隔物210用以提供膜层间的支撑，使得膜层间形成空隙。例如，所述第一间隔物210可设置在薄膜晶体管（thin film transistor, TFT）阵列基板和彩膜（color filter, CF）基板之间，用于在TFT阵列基板和CF基板间形成空隙。又如，所述第一间隔物210可设置在OLED基板与阻挡水氧侵入的薄膜封装结构之间，用于在OLED基板和薄膜封装结构间形成空隙。
所述第一间隔物210可包括感光型间隔物，其材料为有机光阻。例如，所述第一间隔物210可采用DL-1000或者DL-1001C等有机光阻材料制成，可采用一般光刻工艺或者半色调（half-tone）工艺进行制作。
如图3所示，设于弯折区域20中的所述第一间隔物210呈网状分布，且环绕着所述多个子像素201、202及203。具体地，如图3所示，所述第一间隔物210由呈网状分布的直线线段构成。于一实施例中，所述第一间隔物210环绕所述弯折区域20中的每一个子像素。具体地，所述第一间隔物210设于红色子像素201和蓝色子像素202之间、红色子像素201和绿色子像素203之间以及蓝色子像素202和绿色子像素203之间。
由于弯折区域20中子像素周围有第一间隔物210环绕，第一间隔物210均匀分布，厚度和图形均一致，在折叠过程中能较好地分散来自外部或者内部应力，避免应力较大地集中在某一个子像素上而导致其失效。
所述显示面板还可包括设于所述非弯折区域10的多个第二间隔物220，所述多个第二间隔物220中的每一个对应一预定数目的子像素，例如每个第二间隔物220为小方形（12*12um），每8个子像素中分布一个第二间隔物220，分布密度为0.35%。所述多个第二间隔物220，用以提供支撑并使得空隙形成，具体用以提供膜层间的支撑，使得膜层间形成空隙。所述多个第二间隔物220可与所述第一间隔物210为相同材料，于同一制程下制成。例如，所述多个第二间隔物220与所述第一间隔物210皆为有机光阻，于同一制程下采用一般光刻工艺或者半色调（half-tone）工艺进行制作。所述多个第二间隔物220与所述第一间隔物210同时制作时，不需要额外增加掩模板（mask），只需更改现有的掩模板即可。
图4显示根据本申请第二实施例的一种可折叠OLED显示面板的示意图。本申请第二实施例与第一实施例的差别在于，本申请第二实施例中，所述显示面板包括第一间隔物310，所述第一间隔物310由呈网状分布的折曲型线段构成。与第一实施例相比，本申请第二实施例中由呈网状分布的折曲型线段构成的第一间隔物310，能更好地缓冲、释放应力。
本申请第一实施例和第二实施例的可折叠OLED显示面板中，所述显示面板分为非弯折区域和弯折区域，弯折区域中的间隔物为网状分布，环绕着子像素（如红色、蓝色和绿色子像素）。通过这种网状的间隔物，可以保护被围绕起来的子像素，有效避免各子像素应力分配不均匀的问题，增强弯折区域中的子像素在弯折过程中承受应力的整体能力，确保显示面板的可靠性。
综上所述，虽然本申请已以优选实施例揭露如上，但上述优选实施例并非用以限制本申请，本领域的普通技术人员，在不脱离本申请的范围内，均可作各种更动与润饰，因此本申请的保护范围以权利要求界定的范围为准。

Claims (16)

  1. 一种可折叠OLED显示面板，所述显示面板包括弯折区域及非弯折区域，所述显示面板折叠时，所述弯折区域形成曲面，所述显示面板不折叠时，所述弯折区域和所述非弯折区域为平面，所述显示面板包括：
    多个子像素，形成于所述弯折区域和所述非弯折区域中，所述多个子像素的全部或部分子像素具有自发光特性；以及
    第一间隔物，用以提供支撑并使得空隙形成，所述第一间隔物设于所述弯折区域，且呈网状分布，环绕着所述多个子像素。
  2. 根据权利要求1所述的可折叠OLED显示面板，其中所述第一间隔物环绕所述弯折区域中的每一个子像素。
  3. 根据权利要求1所述的可折叠OLED显示面板，其中所述多个子像素包括红色子像素、蓝色子像素及绿色子像素，所述第一间隔物设于所述红色子像素和所述蓝色子像素之间、所述红色子像素和所述绿色子像素之间以及所述蓝色子像素和所述绿色子像素之间。
  4. 根据权利要求1所述的可折叠OLED显示面板，其中所述第一间隔物由呈网状分布的直线线段构成。
  5. 根据权利要求1所述的可折叠OLED显示面板，其中所述第一间隔物由呈网状分布的折曲型线段构成。
  6. 根据权利要求1所述的可折叠OLED显示面板，其中所述显示面板还包括：
    多个第二间隔物，用以提供支撑并使得空隙形成，所述多个第二间隔物设于所述非弯折区域，所述多个第二间隔物中的每一个对应一预定数目的所述子像素。
  7. 根据权利要求6所述的可折叠OLED显示面板，其中所述第一间隔物和所述多个第二间隔物的材料相同。
  8. 根据权利要求1所述的可折叠OLED显示面板，其中所述第一间隔物包括感光型间隔物。
  9. 根据权利要求8所述的可折叠OLED显示面板，其中所述第一间隔物的材料为有机光阻。
  10. 一种可折叠OLED显示面板，所述显示面板包括弯折区域及非弯折区域，所述显示面板折叠时，所述弯折区域形成曲面，所述显示面板不折叠时，所述弯折区域和所述非弯折区域为平面，所述显示面板包括：
    多个子像素，形成于所述弯折区域和所述非弯折区域中，所述多个子像素的全部或部分子像素具有自发光特性；
    第一间隔物，用以提供支撑并使得空隙形成，所述第一间隔物设于所述弯折区域；以及
    多个第二间隔物，用以提供支撑并使得空隙形成，所述多个第二间隔物设于所述非弯折区域，
    其中所述多个第二间隔物中的每一个对应一预定数目的所述子像素，所述第一间隔物呈网状分布，并环绕所述弯折区域中的每一个所述子像素。
  11. 根据权利要求10所述的可折叠OLED显示面板，其中所述多个子像素包括红色子像素、蓝色子像素及绿色子像素，所述第一间隔物设于所述红色子像素和所述蓝色子像素之间、所述红色子像素和所述绿色子像素之间以及所述蓝色子像素和所述绿色子像素之间。
  12. 根据权利要求10所述的可折叠OLED显示面板，其中所述第一间隔物由呈网状分布的直线线段构成。
  13. 根据权利要求10所述的可折叠OLED显示面板，其中所述第一间隔物由呈网状分布的折曲型线段构成。
  14. 根据权利要求10所述的可折叠OLED显示面板，其中所述第一间隔物和所述多个第二间隔物的材料相同。
  15. 根据权利要求10所述的可折叠OLED显示面板，其中所述第一间隔物包括感光型间隔物。
  16. 根据权利要求15所述的可折叠OLED显示面板，其中所述第一间隔物的材料为有机光阻。
PCT/CN2019/082274 2018-12-20 2019-04-11 可折叠oled显示面板 Ceased WO2020124886A1 (zh)

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