WO2019228024A1 - 柔性显示面板 - Google Patents

柔性显示面板 Download PDF

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Publication number
WO2019228024A1
WO2019228024A1 PCT/CN2019/078009 CN2019078009W WO2019228024A1 WO 2019228024 A1 WO2019228024 A1 WO 2019228024A1 CN 2019078009 W CN2019078009 W CN 2019078009W WO 2019228024 A1 WO2019228024 A1 WO 2019228024A1
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WIPO (PCT)
Prior art keywords
protective film
flexible substrate
present disclosure
grooves
display panel
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Ceased
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PCT/CN2019/078009
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English (en)
French (fr)
Inventor
闫灏
张瑜
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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Priority to US16/491,775 priority Critical patent/US11826997B2/en
Publication of WO2019228024A1 publication Critical patent/WO2019228024A1/zh
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W74/00—Encapsulations, e.g. protective coatings
    • H10W74/10—Encapsulations, e.g. protective coatings characterised by their shape or disposition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B32B2038/047—Perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/02—2 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays

Definitions

  • Embodiments of the present disclosure relate to the field of display technology, and in particular, to a flexible display panel.
  • An embodiment of the present disclosure provides a flexible display panel.
  • a flexible display panel includes a flexible substrate and a protective film on the flexible substrate.
  • the protective film includes a plurality of grooves disposed at intervals. The position of the groove corresponds to a region of the flexible substrate on which the display unit is not formed.
  • the plurality of grooves include at least one row of grooves.
  • the plurality of grooves further include at least one row of grooves intersecting the at least one row of grooves.
  • At least one dimension of the groove is gradually increased along the attaching direction.
  • the display unit is provided in an array form.
  • the position of the groove corresponds to a region between the display units.
  • the shape of the groove includes a rectangle, a circle, or a diamond.
  • a material of the protective film includes polyethylene terephthalate.
  • the protective film is located on a side of the flexible substrate on which the display unit is not formed.
  • FIG. 1 is a schematic cross-sectional view of a flexible display panel
  • FIG. 2 is a schematic cross-sectional view of a flexible display panel according to an embodiment of the present disclosure
  • FIG. 3 is a schematic plan view of a protective film according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic plan view of a protective film according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic plan view of a protective film according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic plan view of a protective film according to an embodiment of the present disclosure.
  • FIG. 7 illustrates a schematic cross-sectional view of a flexible display panel according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic plan view showing a positional relationship between a groove of a protective film and a display unit according to an embodiment of the present disclosure in the configuration shown in FIG. 7.
  • a protective film is required to protect the flexible substrate.
  • the protective film 102 generates a stress F during the attaching process to the surface of the flexible substrate 101, and as the attaching process proceeds, the stress F will increase along the attaching direction.
  • the flexible substrate 101 and the display unit (not shown) formed on the flexible substrate 101 will be warped.
  • a flexible display panel in an embodiment of the present disclosure, includes a flexible substrate and a protective film on the flexible substrate.
  • the protective film includes a plurality of grooves disposed at intervals.
  • FIG. 2 is a schematic cross-sectional view of a flexible display panel according to an embodiment of the present disclosure.
  • the flexible display panel 100 includes a flexible substrate 101 and a protective film 102 ′ on the flexible substrate 101.
  • the protective film 102 ' includes a plurality of grooves 1 disposed at intervals, so that the stress F' generated in the attaching direction during the attaching process of the protective film 102 'can be partially released, and the stress F' is always maintained during the attaching Keep it low.
  • 3 to 6 are schematic plan views of a protective film according to an embodiment of the present disclosure.
  • the protective film 102 in an exemplary embodiment of the present disclosure, as shown in FIG. 3, the protective film 102 'includes a plurality of grooves 1 disposed at intervals.
  • the plurality of grooves 1 includes at least one row of grooves 1.
  • the protective film 102 'further includes at least one row of grooves 1 intersecting the at least one row of grooves 1, thereby being able to more effectively release the stress of the protective film.
  • At least one size of the groove 1 in the protective film 102 ′ is gradually increased in the attaching direction.
  • the stress will increase in the attaching direction. Therefore, setting at least one dimension of the groove of the protective film to gradually increase in the attaching direction further contributes to the full release of the stress.
  • FIG. 7 is a schematic cross-sectional view of a flexible display panel according to an embodiment of the present disclosure.
  • the position of the groove 1 corresponds to an area of the flexible substrate 101 where the display unit 103 is not formed. That is, the orthographic projection of the groove 1 on the flexible substrate 101 and the orthographic projection of the display unit 103 on the flexible substrate 101 do not overlap. Therefore, the groove 1 does not affect the protection of the portion of the flexible substrate 101 where the display unit 103 is formed by the protective film 102 '.
  • FIG. 8 is a schematic plan view showing a positional relationship between a groove of a protective film and a display unit according to an embodiment of the present disclosure in the configuration shown in FIG. 7.
  • the display unit 103 (shown as a dotted frame in the figure) is provided in an array form.
  • the position of the groove 1 may correspond to a region between adjacent display units 103. That is, the groove 1 is located in a cutting area for separating the display unit 103.
  • the groove 1 does not deteriorate the protective effect of the protective film 102 'on the flexible substrate 101 thus separated.
  • the groove 1 can release stress generated during the attaching process of the protective film 102 ', thereby preventing the display unit 103 formed on the flexible substrate 101 from warping due to stress accumulation.
  • the shape of the groove 1 includes a rectangle, a circle, or a diamond. It should be noted that the drawings only show a specific embodiment of the shape of the groove 1, which cannot be considered as a limitation to the present disclosure.
  • a material of the protective film may include polyethylene terephthalate.
  • a method of forming a groove in a protective film may include punching or laser cutting.
  • an adhesive layer (not shown) may be further provided between the protective film and the flexible substrate for attaching the protective film to the flexible substrate, thereby realizing Protection of flexible substrate.
  • the material of the adhesive layer may include acrylic glue.
  • the thickness of the protective film may range from 30 ⁇ m to 200 ⁇ m. As an example, the thickness of the protective film is 100 ⁇ m.
  • the protective film according to an embodiment of the present disclosure may be attached after a display unit is formed on a flexible substrate.
  • the protective film is located on a side of the flexible substrate on which the display unit is not formed. As shown in FIG. 7, a protective film 102 'is formed on the side of the flexible substrate 101 on which the display unit 103 is not formed.
  • the protective film can release the stress generated during the attaching process of the protective film, thereby preventing the display unit in the display panel from warping.

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Abstract

本公开涉及一种柔性显示面板。所述柔性显示面板包括柔性衬底和位于所述柔性衬底上的保护膜。所述保护膜包括间隔设置的多个凹槽。所述多个凹槽包括至少一行凹槽。所述凹槽的位置对应于所述柔性衬底的未形成有显示单元的区域。

Description

柔性显示面板
相关申请的交叉引用
本申请要求于2018年5月31日递交的中国专利申请第201810550311.3号优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开的实施例涉及显示技术领域，尤其涉及一种柔性显示面板。
背景技术
在显示技术领域，柔性显示器以其低功耗、体积小、结构轻薄以及可变形等优点应用到更广泛的领域中。
发明内容
本公开的实施例提供了一种柔性显示面板。
根据本公开的第一方面，提供了一种柔性显示面板。所述柔性显示面板包括柔性衬底和位于所述柔性衬底上的保护膜。所述保护膜包括间隔设置的多个凹槽。所述凹槽的位置对应于所述柔性衬底的未形成有显示单元的区域。
在本公开的实施例中，所述多个凹槽包括至少一行凹槽。
在本公开的实施例中，所述多个凹槽还包括与所述至少一行凹槽相交的至少一列凹槽。
在本公开的实施例中，所述凹槽的至少一个尺寸沿贴附方向逐渐增大。
在本公开的实施例中，所述显示单元被设置为阵列形式。所述凹槽的位置对应于所述显示单元之间的区域。
在本公开的实施例中，所述凹槽的形状包括矩形、圆形或菱形。
在本公开的实施例中，所述保护膜的材料包括聚对苯二甲酸乙二醇酯。
在本公开的实施例中，所述保护膜位于所述柔性衬底的未形成有显示单元的一侧。
适应性的进一步的方面和范围从本文中提供的描述变得明显。应当理解，本申请的各个方面可以单独或者与一个或多个其他方面组合实施。还应当理解，本文中的描述和特定实施例旨在仅说明的目的并不旨在限制本申请的范围。
附图说明
本文中描述的附图用于仅对所选择的实施例的说明的目的，并不是所有可能的实施方式，并且不旨在限制本申请的范围，其中：
图1示出了一种柔性显示面板的截面示意图；
图2示出了根据本公开的实施例的柔性显示面板的截面示意图；
图3示出了根据本公开的实施例的保护膜的平面示意图；
图4示出了根据本公开的实施例的保护膜的平面示意图；
图5示出了根据本公开的实施例的保护膜的平面示意图；
图6示出了根据本公开的实施例的保护膜的平面示意图；
图7示出了根据本公开的实施例的柔性显示面板的截面示意图；以及
图8示出了图7所示配置中的根据本公开的实施例的保护膜的凹槽与显示单元的位置关系的平面示意图。
贯穿这些附图的各个视图，相应的参考编号指示相应的部件或特征。
具体实施方式
首先，需要说明的是，除非上下文中另外明确地指出，否则在本文和所附权利要求中所使用的词语的单数形式包括复数，反之亦然。因而，当提及单数时，通常包括相应术语的复数。相似地，措辞“包含”和“包括”将解释为包含在内而不是独占性地。同样地，术语“包括”和“或”应当解释为包括在内的，除非本文中另有说明。在本文中使用术语“实例”之处，特 别是当其位于一组术语之后时，所述“实例”仅仅是示例性的和阐述性的，且不应当被认为是独占性的或广泛性的。
此外，还需要说明的是，当介绍本申请的元素及其实施例时，冠词“一”、“一个”、“该”和“所述”旨在表示存在一个或者多个要素；除非另有说明，“多个”的含义是两个或两个以上；用语“包含”、“包括”、“含有”和“具有”旨在包括性的并且表示可以存在除所列要素之外的另外的要素；术语“第一”、“第二”、“第三”等仅用于描述的目的，而不能理解为指示或暗示相对重要性及形成顺序。
现将参照附图更全面地描述示例性的实施例。
目前，在柔性显示面板中，需要采用保护膜对柔性衬底进行保护。然而，如图1所示，保护膜102在被贴附到柔性衬底101的表面的贴附过程中会产生应力F，并且随着贴附过程的进行，沿贴附方向，应力F将越来越大，由此会使柔性衬底101以及形成在柔性衬底101上的显示单元(未示出)发生翘曲。
在本公开的实施例中，提供了一种柔性显示面板。该柔性显示面板包括柔性衬底和位于柔性衬底上的保护膜。该保护膜包括间隔设置的多个凹槽。图2示出了根据本公开的实施例的柔性显示面板的截面示意图。如图2所示，柔性显示面板100包括柔性衬底101和位于柔性衬底101上的保护膜102’。保护膜102’包括间隔设置的多个凹槽1，从而能够部分地释放在保护膜102’的贴附过程中沿贴附方向产生的应力F’，并且使应力F’在贴附过程中始终保持处于较低水平。
图3至6示出了根据本公开的实施例的保护膜的平面示意图。
在本公开的示例性实施例中，如图3所示，保护膜102’包括间隔设置的多个凹槽1。在图3中，该多个凹槽1包括至少一行凹槽1。
在本公开的示例性实施例中，如图4所示，保护膜102’还包括与该至少一行凹槽1相交的至少一列凹槽1，由此能够更有效地释放保护膜的应力。
在本公开的示例性实施例中，如图5所示，保护膜102’中的凹槽1的 至少一个尺寸(例如，沿垂于贴附方向的方向的尺寸)沿贴附方向逐渐增大。应理解，如上所述，随着保护膜的贴附过程的进行，应力将沿贴附方向越来越大。因此，将保护膜的凹槽的至少一个尺寸设置为沿贴附方向逐渐增大更有助于应力的充分释放。
在本公开的示例性实施例中，如图6所示，保护膜102’中的凹槽1的数量沿贴附方向逐渐增多。应理解，如上所述，随着保护膜的贴附过程的进行，应力将沿贴附方向越来越大。因此，将保护膜的凹槽的数量设置为沿贴附方向逐渐增多同样有助于应力的充分释放。
在本公开的实施例中，凹槽的位置对应于柔性衬底的未形成有显示单元的区域。图7示出了根据本公开的实施例的柔性显示面板的截面示意图。
如图7所示，凹槽1的位置对应于柔性衬底101的未形成有显示单元103的区域。也就是，凹槽1在柔性衬底101上的正投影与显示单元103在柔性衬底101上的正投影不重叠。因此，凹槽1不会影响保护膜102’对柔性衬底101的形成有显示单元103的部分的保护。
图8示出了图7所示配置中的根据本公开的实施例的保护膜的凹槽与显示单元的位置关系的平面示意图。在本公开的示例性实施例中，如图8所示，显示单元103(在图中被示出为虚线框)被设置为阵列形式。作为示例，凹槽1的位置可以对应于相邻的显示单元103之间的区域。也就是，凹槽1位于用于分离显示单元103的切割区域内。通过这样的配置，凹槽1不会劣化保护膜102’对由此分离的柔性衬底101的保护作用。这里，凹槽1能够释放在保护膜102’的贴附过程中产生的应力，从而防止形成在柔性衬底101上的显示单元103发生由应力积累导致的翘曲。
在本公开的示例性实施例中，凹槽1的形状包括矩形、圆形或菱形。需要注意，附图仅示出了凹槽1的形状的一个具体的实施例，其不能被视为是对本公开的限定。
在本公开的示例性实施例中，保护膜的材料可以包括聚对苯二甲酸乙二醇酯。
在本公开的示例性实施例中，在保护膜中形成凹槽的方法可以包括冲压或激光切割。
此外，在本公开的实施例中，在保护膜与柔性衬底之间还可以设置有粘结层(未示出)，以用于将保护膜贴附至柔性衬底上，由此实现对柔性衬底的保护。作为示例，粘结层的材料可以包括亚克力胶。
在本公开的示例性实施例中，保护膜的厚度的范围可以为30μm至200μm。作为示例，保护膜的厚度为100μm。
应注意，根据本公开的实施例的保护膜可以在柔性衬底上形成显示单元之后进行贴附。
在本公开的实施例中，保护膜位于柔性衬底的未形成有显示单元的一侧。如图7所示，保护膜102’形成在柔性衬底101的未形成有显示单元103的一侧。该保护膜能够释放在保护膜的贴附过程中产生的应力，从而防止显示面板中的显示单元发生翘曲。
以上为了说明和描述的目的提供了实施例的前述描述。其并不旨在是穷举的或者限制本申请。特定实施例的各个元件或特征通常不限于特定的实施例，但是，在合适的情况下，这些元件和特征是可互换的并且可用在所选择的实施例中，即使没有具体示出或描述。同样也可以以许多方式来改变。这种改变不能被认为脱离了本申请，并且所有这些修改都包含在本申请的范围内。

Claims (8)

  1. 一种柔性显示面板，包括柔性衬底和位于所述柔性衬底上的保护膜，所述保护膜包括间隔设置的多个凹槽，
    其中，所述凹槽的位置对应于所述柔性衬底的未形成有显示单元的区域。
  2. 根据权利要求1所述的保护膜，其中，所述多个凹槽包括至少一行凹槽。
  3. 根据权利要求2所述的保护膜，其中，所述多个凹槽还包括与所述至少一行凹槽相交的至少一列凹槽。
  4. 根据权利要求1所述的保护膜，其中，所述凹槽的至少一个尺寸沿贴附方向逐渐增大。
  5. 根据权利要求1所述的保护膜，其中，所述显示单元被设置为阵列形式，
    其中，所述凹槽的位置对应于所述显示单元之间的区域。
  6. 根据权利要求1所述的保护膜，其中，所述凹槽的形状包括矩形、圆形或菱形。
  7. 根据权利要求1所述的保护膜，其中，所述保护膜的材料包括聚对苯二甲酸乙二醇酯。
  8. 根据权利要求1所述的显示面板，其中，所述保护膜位于所述柔性衬底的未形成有显示单元的一侧。
PCT/CN2019/078009 2018-05-31 2019-03-13 柔性显示面板 Ceased WO2019228024A1 (zh)

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