WO2023246300A1 - 盖板及显示模组 - Google Patents

盖板及显示模组 Download PDF

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Publication number
WO2023246300A1
WO2023246300A1 PCT/CN2023/091192 CN2023091192W WO2023246300A1 WO 2023246300 A1 WO2023246300 A1 WO 2023246300A1 CN 2023091192 W CN2023091192 W CN 2023091192W WO 2023246300 A1 WO2023246300 A1 WO 2023246300A1
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WO
WIPO (PCT)
Prior art keywords
flexible flat
flat layer
cover plate
layer
flexible
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PCT/CN2023/091192
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English (en)
French (fr)
Inventor
高彪
李钊
张雄南
蔡鹏�
史世明
张嵩
Original Assignee
京东方科技集团股份有限公司
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Publication of WO2023246300A1 publication Critical patent/WO2023246300A1/zh

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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
    • 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 the technical field of display devices, and in particular to a cover plate and a display module.
  • foldable display devices are a trend in future development.
  • Electronic devices include two flattening areas and a bending area connecting the two flattening areas.
  • the display device can be folded along the middle bending area during use. When folded, it is convenient for users to store. When unfolded, it provides a larger display area and expands the display information.
  • the upper surface of the display device is a flexible display module.
  • the flexible display module 02 provides image display for the user.
  • the user can also use a stylus to perform interactive operations such as writing and drawing on the flexible display module.
  • Flexible display modules are generally a stacked structure composed of multi-layer functional films.
  • the cover is placed on the outermost layer to protect other functional layers in the middle of the flexible display module. It also needs to be anti-fingerprint and scratch-resistant.
  • the cover is made of flexible material, usually polyimide material. This will reduce the mechanical strength of the surface of the flexible display module, and it will also cause damage to the user.
  • a stylus to write on the surface of the flexible display module, it has a poor tactile feel and is prone to scratches.
  • the present disclosure provides a cover plate and a display module.
  • the cover plate can improve the surface strength of the display module while satisfying the bending performance of the bending area.
  • a cover plate which is divided into a flattened area and a bending area connected to the flattened area;
  • the cover plate includes a first flexible flat layer, an intermediate reinforcing layer and a second flexible flat layer that are stacked in sequence.
  • the first flexible flat layer is configured to be disposed adjacent to the display panel.
  • the second flexible flat layer is configured to In order to be disposed away from the display panel, the middle reinforcing layer has a slot covering the bending area, and the Young's modulus of the middle reinforcing layer is respectively greater than the Young's modulus of the first flexible flat layer and the Young's modulus of the second flexible flat layer;
  • the cover plate further includes a flexible filling part filled in the slot, and the Young's modulus of the flexible filling part is smaller than the Young's modulus of the second flexible flat layer.
  • the cover plate provided by the embodiments of the invention adopts a multi-film layer composite design, including a first flexible flat layer, an intermediate reinforcing layer and a second flexible flat layer that are stacked in sequence.
  • the first flexible flat layer can be adjacent to the light emitting surface of the display panel. It is set that the second flexible flat layer may be located on a side away from the display panel.
  • the Young's modulus of the middle reinforcing layer is greater than the Young's modulus of the first flexible flat layer and the Young's modulus of the second flexible flat layer, it can Improve the surface strength of the display module, improve the rigid impact performance and scratch resistance of the display module, and improve the user's writing experience using a stylus on the surface of the display module, reducing the occurrence of scratches, and due to the intermediate reinforcement
  • the layer has a slot covering the bending area, and the slot is filled with a flexible filling part.
  • the Young's modulus of the flexible filling part is smaller than the Young's modulus of the second flexible flat layer, which can make the bending zone more flexible and can While improving the surface strength of the display module, it also meets the bending performance of the bending area.
  • the groove runs through the middle reinforcing layer.
  • the side wall of the groove is an arc transition shape smoothly transitioning to the surface of the middle reinforcing layer toward the first flexible flat layer.
  • a side of the middle reinforcing layer facing the first flexible flat layer has the groove.
  • the thickness of the portion of the intermediate reinforcing layer located in the bending area along the first direction is less than or equal to the thickness of the first flexible flat layer and the second flexible flat layer along the first direction, respectively.
  • One direction is the arrangement direction of the first flexible flat layer and the second flexible flat layer.
  • the distance between two opposite side walls of the slot gradually decreases along the direction in which the notch of the slot points toward the bottom of the slot.
  • the slotted trough body extends to the flattened area.
  • the refractive index of the flexible filling part is the same as the refractive index of the intermediate reinforcing layer.
  • the material of the flexible filling part is the same as the material of the first flexible flat layer.
  • the material of the first flexible flat layer is the same as the material of the second flexible flat layer.
  • an anti-reflective film located on the side of the second flexible flat layer away from the intermediate reinforcing layer is also included.
  • the anti-reflective film is doped with refractive particles, and the refractive index of the refractive particles is greater than the refractive index of the anti-reflective film.
  • a side of the anti-reflection film adjacent to the second flexible flat layer has a concave-convex structure configured as anti-reflection.
  • the present disclosure also provides a display module, including a display panel and any one of the cover plates provided in the above technical solutions.
  • the first flexible flat layer of the cover plate is disposed adjacent to the light exit surface of the display panel.
  • the cover plate The second flexible flat layer is disposed away from the display panel.
  • Figure 1 is a schematic structural diagram of a display device provided by an embodiment of the present disclosure
  • Figures 2 to 13 are respectively schematic structural diagrams of a cover provided by embodiments of the present disclosure.
  • Figure 14 is a schematic structural diagram of an anti-reflective film provided by an embodiment of the present disclosure.
  • FIG. 15 is a schematic structural diagram of a display module provided by an embodiment of the present disclosure.
  • Figure 1 is a schematic diagram of an electronic device 01 in an unfolded state, including two flattened areas 101 and a bending area 102 connecting the two flattened areas.
  • the display device can be folded along the middle bending area 102 during use. When folded, it is convenient for the user to store, and when unfolded, it provides a larger display area and expands display information.
  • the upper surface of the display device is a flexible display module 02.
  • the flexible display module 02 provides image display for the user.
  • the user can also use a stylus to perform interactive operations such as writing and drawing on the flexible display module.
  • Flexible display modules are generally a stacked structure composed of multi-layer functional films.
  • the cover is placed on the outermost layer to protect other functional layers in the middle of the flexible display module. It also needs to be anti-fingerprint and scratch-resistant.
  • the cover is made of flexible material, usually polyimide material. This will reduce the mechanical strength of the surface of the flexible display module, and it will also cause damage to the user.
  • a stylus to write on the surface of the flexible display module, it has a poor tactile feel and is prone to scratches.
  • the present disclosure provides a cover plate and a display module.
  • the cover plate can improve the surface strength of the display module while meeting the bending performance of the bending area.
  • the present disclosure provides a cover plate, which is divided into a flattening area A and a bending area B connected to the flattening area A.
  • the cover plate includes a first flexible flat layer 1, an intermediate reinforcing layer 2 and a second flexible flat layer 3 that are stacked in sequence.
  • the first flexible flat layer 1 is used to be placed adjacent to the display panel, and the second flexible flat layer 3 is used to be placed away from the display.
  • the panel is configured, the middle reinforcing layer 2 has a slot 21 covering the bending area B, and the cover plate also includes a flexible filling part 4 filled in the slot 21.
  • the Young's modulus of the middle reinforcing layer 2 is greater than the Young's modulus of the first flexible flat layer 1 and the second flexible flat layer 3 respectively, and the Young's modulus of the flexible filling part 4 is smaller than the second flexible flat layer Young’s modulus of layer 3.
  • a multi-film layer composite design including a first flexible flat layer 1, an intermediate reinforcing layer 2 and a second flexible flat layer 3 stacked in sequence.
  • the first flexible flat layer 1 can be adjacent to The light-emitting surface of the display panel is arranged, and the second flexible flat layer 3 can be located on the side away from the display panel.
  • the Young's modulus of the middle reinforcing layer 2 is greater than the Young's modulus of the first flexible flat layer 1 and the second flexible flat layer
  • the Young's modulus of layer 3 can improve the surface strength of the display module, improve the rigid impact performance and scratch resistance of the display module, and can improve the user's writing experience when using a stylus on the surface of the display module, reducing scratches. the production of marks.
  • the middle reinforcing layer 2 has the slot 21 covering the bending area B, the slot 21 is filled with the flexible filling part 4, and the Young's modulus of the flexible filling part 4 is smaller than the Young's modulus of the second flexible flat layer 3. , which can make the bending area more flexible and improve the display
  • the surface strength of the module meets the bending performance of bending zone B.
  • the zoning situation of the cover plate can be to have at least two flattening areas A and a bending area B connecting the two flattening areas, as shown in Figures 1 to 13; or it can also be to have more than three flattening areas.
  • the middle reinforcing layer 2 can be made first, and then the flexible filling part 4, the first flexible flat layer 1 and the second flexible flat layer 3 are formed on the middle reinforcing layer 2.
  • the first flexible flat layer 1 and the second flexible flat layer 3 can flatten both sides of the middle reinforcing layer 2 .
  • the slot 21 can penetrate the through groove of the middle reinforcing layer 2, that is, the middle reinforcing layer 2 is in the bending area B
  • the flexible filling part 4 is filled between the broken middle reinforcing layers 2, which can better ensure the bending performance of the bending area B.
  • the side walls of the slot 21 are in a shape that can be aligned with the middle reinforcing layer 2 toward the first flexible
  • the surface of the flat layer 1 is smoothly connected to an arc transition shape.
  • the arc transition shape can reduce the adverse optical effects caused by the splicing state of the intermediate reinforcement layer 2 and improve the optical consistency of the display module.
  • the grooves 21 can also be provided as grooves, as shown in Figures 10, 11, 12 and 13.
  • the grooves 21 are provided on the side of the middle reinforcing layer 2 facing the first flexible flat layer 1.
  • the slot 21 is provided on the side of the middle reinforcing layer 2 facing the second flexible flat layer 3, that is, the middle reinforcing layer 2 has a non-disconnected design, and the part of the middle reinforcing layer 2 in the bending area B can be carved. Erosion and thinning are required to achieve the bending performance of bending zone B. There is no restriction here and it will be determined according to the actual situation.
  • the thickness of the portion of the middle reinforcing layer 2 located in the bending region B along the first direction may be less than or equal to the first flexible flat layer 1 and The thickness of the second flexible flat layer 3 along the first direction can improve the bending performance of the bending area B.
  • the first direction is the arrangement direction of the first flexible flat layer 1 and the second flexible flat layer 3, that is, the vertical direction in the figure.
  • the groove body of the slot 21 can extend to the flattened area A, which can expand
  • the filling range of the large flexible filling part 4 can better ensure the bending performance of the bending area B.
  • the distance between the two opposite side walls of the slot 21 points along the notch of the slot 21 (the notch refers to the side adjacent to the first flexible flat layer 1) toward the bottom of the slot.
  • the groove bottom refers to the side adjacent to the second flexible flat layer 3) gradually decreases in the direction, which can ensure that the inside of the groove 21 is completely filled when the flexible filling part 4 is applied.
  • the refractive index of the material of the flexible filling part 4 and the material refractive index of the intermediate reinforcing layer 2 need to be as close as possible, which can reduce the material in the transition area between the bending area B and the flattening area A.
  • Optical interference problems caused by differences can improve the optical consistency of the display module.
  • the refractive index of the flexible filling part 4 and the refractive index of the intermediate reinforcing layer 2 may be the same, and the specific material refractive index value may be set to 1.5.
  • the material of the flexible filling part 4 may be the same as the material of the first flexible flat layer 1 .
  • the first flexible flat layer 1 and the flexible filling part 4 can be made of rubber (TPU) material with a modulus of about 10MPa to 500MPa or other polymer materials
  • the middle reinforcing layer 2 can be made of glass with a modulus of about 50GPa to 90GPa. material or other high-hardness materials.
  • the second flexible flat layer 3 can be made of polyimide (PI) material or other polymer materials with a modulus of about 2 GPa to 8 GPa.
  • the material of the flexible filling part 4 may also be different from the material of the first flexible flat layer 1, which is not limited here and depends on the actual situation.
  • the material of the first flexible flat layer 1 may be the same as the material of the second flexible flat layer 3 .
  • the first flexible flat layer 1 and the second flexible flat layer 3 can be made of polyimide (PI) material or other polymer materials with a modulus of about 2 GPa to 8 GPa, and a coating process can be used to form the middle reinforcing layer 2
  • PI polyimide
  • the first flexible flat layer 1 and the second flexible flat layer 3 are formed on both side surfaces of the Approximately 10MPa ⁇ 500MPa rubber (TPU) material or other polymer materials.
  • the thickness of the first flexible flat layer 1 may be 30 ⁇ m to 80 ⁇ m, and the thickness of the portion of the middle reinforcing layer 2 located in the flattened area A may be 80 ⁇ m to 300 ⁇ m.
  • the thickness of the portion of the middle reinforcing layer 2 located in the bending area B may be 30 ⁇ m to 80 ⁇ m, and the thickness of the second flexible flat layer 3 may be 30 ⁇ m to 80 ⁇ m.
  • the specific thicknesses of the first flexible flat layer 1, the middle reinforcing layer 2 and the second flexible flat layer 3 are not limited here and are determined according to the actual situation.
  • the first flexible flat layer 1, the middle reinforcing layer 2 and the second flexible flat layer 3 may be arranged flush or unevenly.
  • the first flexible flat layer 1 and the second flexible flat layer 3 can be retracted relative to the middle reinforcing layer 2, or can exceed the edge of the middle reinforcing layer 2 and wrap the edge of the middle reinforcing layer 2. stand up.
  • the cover plate provided by the embodiment of the present disclosure may also include a second flexible flat layer 3 located on the side away from the middle reinforcing layer 2.
  • the anti-reflective film 5, for example, AG film can improve the optical interference problem caused by the different materials in the transition area between the bending area B and the flattening area A, and can improve the optical consistency of the display module.
  • the thickness of the anti-reflective film 5 can be about 30 ⁇ m to 80 ⁇ m, and the specific value can be determined according to the actual situation.
  • the anti-reflective film 5 may be doped with refractive particles, and the refractive index of the refractive particles is greater than the refractive index of the anti-reflective film.
  • the side of the anti-reflection film 5 adjacent to the second flexible flat layer 3 has a concave-convex structure for anti-reflection, as shown in Figure 14.
  • This concave-convex structure can be protrusions 51 distributed in an array, and the shape of the protrusions can be Hemispherical, zigzag or square, etc. are not limited here and will be determined according to the actual situation.
  • the present disclosure also provides a display module, including a display panel and any one of the cover plates provided in the above technical solutions.
  • the first flexible flat layer 1 of the cover plate is arranged adjacent to the display panel, and the second flexible flat layer 3 of the cover plate is far away from the display panel. Display panel settings.
  • the above-mentioned display module is a flexible display module.
  • the display module 002 can include a cover 100 from top to bottom, placed on the outermost layer to protect other functional layers in the middle of the module, and also has Anti-fingerprint, scratch-resistant and other properties; the optical adhesive layer 200 bonds the cover 100 and the polarizer 300 together; the polarizer 300 is used for anti-reflection of the display module, and some display module structures may have no polarizer;
  • the display panel 400 can provide display and touch functions, and is specifically a flexible display panel;
  • the support member 500 is generally a film layer that works together to provide support for the module.
  • the display module can also be of other structures, which is not limited here and depends on the actual situation.

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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)

Abstract

一种盖板（100）及显示模组（002），盖板（100）分为展平区（A）以及与展平区（A）连接的弯折区（B）；盖板（100）包括依次层叠的第一柔性平坦层（1）、中间补强层（2）和第二柔性平坦层（3），第一柔性平坦层（1）用于临近显示面板（400）的出光面设置，第二柔性平坦层（3）用于远离显示面板（400）设置，中间补强层（2）具有覆盖弯折区（B）的开槽（21），盖板（100）还包括填充于开槽（21）内的柔性填充部（4）；中间补强层（2）的杨氏模量大于第一柔性平坦层（1）的杨氏模量和第二柔性平坦层（3）的杨氏模量，柔性填充部（4）的杨氏模量小于第二柔性平坦层（3）的杨氏模量。能够在提升显示模组（002）表面强度的同时满足弯折区（B）的弯折性能。

Description

盖板及显示模组
相关申请的交叉引用
本公开要求在2022年06月20日提交中国专利局、申请号为202210699225.5、申请名称为“一种盖板及显示模组”的中国专利申请的优先权，其全部内容通过引用结合在本公开中。
技术领域
本公开涉及显示设备技术领域，特别涉及一种盖板及显示模组。
背景技术
目前，可折叠的显示设备是未来发展的一种趋势，电子设备包含两个展平区以及连接两个展平区的弯折区。显示设备使用的过程中可沿着中间的弯折区进行折叠，折叠时便于用户收纳，展开时提供更大的显示区域，扩展显示信息。
显示设备的上表面为柔性显示模组，柔性显示模组02为用户提供图像显示，同时用户也可用触控笔在柔性显示模组上进行书写画图等交互操作。柔性显示模组一般为多层功能膜组成的堆叠结构，其中盖板放在最外层保护柔性显示模组中间的其他功能层，同时还需要具有防指纹，耐刮擦等性能。而现有的柔性显示模组中，为了实现可弯折的功能，盖板由柔性材料形成，一般为聚酰亚胺材料，这样会使得柔性显示模组的表面的机械强度降低，并且在用户使用触控笔在柔性显示模组表面书写时触感不佳、容易产生划痕。
发明内容
本公开提供了一种盖板及显示模组，上述盖板能够在提升显示模组表面强度的同时满足弯折区的弯折性能。
为达到上述目的，本公开提供以下技术方案：
一种盖板，分为展平区以及与所述展平区连接的弯折区；
所述盖板包括依次层叠设置的第一柔性平坦层、中间补强层和第二柔性平坦层，所述第一柔性平坦层被配置为临近显示面板设置，所述第二柔性平坦层被配置为远离显示面板设置，所述中间补强层具有覆盖所述弯折区的开槽，所述中间补强层的杨氏模量分别大于所述第一柔性平坦层的杨氏模量和所述第二柔性平坦层的杨氏模量；
所述盖板还包括填充于所述开槽内的柔性填充部，所述柔性填充部的杨氏模量小于所述第二柔性平坦层的杨氏模量。
上述发明实施例提供的盖板中，采用多膜层复合设计，包括依次层叠的第一柔性平坦层、中间补强层和第二柔性平坦层，第一柔性平坦层可以临近显示面板的出光面设置，第二柔性平坦层可以位于远离显示面板的一侧，由于中间补强层的杨氏模量大于第一柔性平坦层的杨氏模量和第二柔性平坦层的杨氏模量，能够提高显示模组的表面强度，提升显示模组的刚性冲击性能以及耐刮擦性能，并且能够提升用户在显示模组表面使用触控笔的书写感受，降低划痕的产生，而由于中间补强层具有覆盖弯折区的开槽，开槽内填充有柔性填充部，柔性填充部的杨氏模量小于第二柔性平坦层的杨氏模量，能够使得弯折区的柔性更大，能够在提升显示模组表面强度的同时满足弯折区的弯折性能。
可选地，所述开槽贯穿所述中间补强层。
可选地，所述开槽的侧壁为与所述中间补强层朝向所述第一柔性平坦层的表面平滑过渡连接的圆弧过渡形。
可选地，所述中间补强层朝向所述第一柔性平坦层的一侧具有所述开槽。
可选地，所述中间补强层位于所述弯折区的部分沿第一方向的厚度分别小于等于所述第一柔性平坦层和第二柔性平坦层沿第一方向的厚度，所述第一方向为所述第一柔性平坦层和所述第二柔性平坦层的排列方向。
可选地，所述开槽相对的两个侧壁之间的距离沿所述开槽的槽口指向槽底的方向逐渐减小。
可选地，所述开槽的槽体延伸到所述展平区。
可选地，所述柔性填充部的折射率与所述中间补强层的折射率相同。
可选地，所述柔性填充部的材料与所述第一柔性平坦层的材料相同。
可选地，所述第一柔性平坦层的材料与所述第二柔性平坦层的材料相同。
可选地，还包括位于所述第二柔性平坦层远离所述中间补强层一侧的防反射膜。
可选地，所述防反射膜内部掺杂有折射粒子，所述折射粒子的折射率大于所述防反射膜的折射率。
可选地，所述防反射膜临近所述第二柔性平坦层的一侧具有被配置为防反射的凹凸结构。
本公开还提供一种显示模组，包括显示面板以及上述技术方案中提供的任意一种盖板，所述盖板的第一柔性平坦层临近所述显示面板的出光面设置，所述盖板的第二柔性平坦层远离所述显示面板设置。
附图说明
图1为本公开实施例提供的一种显示设备的结构示意图；
图2至图13分别为本公开实施例提供的一种盖板的结构示意图；
图14为本公开实施例提供的一种防反射膜的结构示意图；
图15为本公开实施例提供的一种显示模组的结构示意图。
具体实施方式
目前，可折叠的显示设备是未来发展的一种趋势，如图1所述为电子设备01展开状态的示意图，包含两个展平区101以及连接两个展平区的弯折区102。显示设备使用的过程中可沿着中间弯折区102进行折叠，折叠时便于用户收纳，展开时提供更大的显示区域，扩展显示信息。
显示设备的上表面为柔性显示模组02，柔性显示模组02为用户提供图像显示，同时用户也可用触控笔在柔性显示模组上进行书写画图等交互操作。 柔性显示模组一般为多层功能膜组成的堆叠结构，其中盖板放在最外层保护柔性显示模组中间的其他功能层，同时还需要具有防指纹，耐刮擦等性能。而现有的柔性显示模组中，为了实现可弯折的功能，盖板由柔性材料形成，一般为聚酰亚胺材料，这样会使得柔性显示模组的表面的机械强度降低，并且在用户使用触控笔在柔性显示模组表面书写时触感不佳、容易产生划痕。
本公开提供了一种盖板及显示模组，盖板能够在提升显示模组表面强度的同时满足弯折区的弯折性能。
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
请参考图2至图13，本公开提供的一种盖板，分为展平区A以及与展平区A连接的弯折区B。盖板包括依次层叠设置的第一柔性平坦层1、中间补强层2和第二柔性平坦层3，第一柔性平坦层1用于临近显示面板设置，第二柔性平坦层3用于远离显示面板设置，中间补强层2具有覆盖弯折区B的开槽21，盖板还包括填充于开槽21内的柔性填充部4。中间补强层2的杨氏模量分别大于第一柔性平坦层1的杨氏模量和第二柔性平坦层3的杨氏模量，柔性填充部4的杨氏模量小于第二柔性平坦层3的杨氏模量。
在本公开实施例提供的盖板中，采用多膜层复合设计，包括依次层叠的第一柔性平坦层1、中间补强层2和第二柔性平坦层3，第一柔性平坦层1可以临近显示面板的出光面设置，第二柔性平坦层3可以位于远离显示面板的一侧，由于中间补强层2的杨氏模量大于第一柔性平坦层1的杨氏模量和第二柔性平坦层3的杨氏模量，能够提高显示模组的表面强度，提升显示模组的刚性冲击性能以及耐刮擦性能，并且能够提升用户在显示模组表面使用触控笔的书写感受，降低划痕的产生。而由于中间补强层2具有覆盖弯折区B的开槽21，开槽21内填充有柔性填充部4，柔性填充部4的杨氏模量小于第二柔性平坦层3的杨氏模量，能够使得弯折区的柔性更大，能够在提升显示 模组表面强度的同时满足弯折区B的弯折性能。
具体地，盖板的分区情况可以为具有至少两个展平区A以及一个连接两个展平区的弯折区B，如图1至图13所示；或者还可以为具有三个以上展平区A以及连接两个相邻展平区A的弯折区B；或者还可以为能实现其他弯折形态的分区情况，在这里不做显示，根据实际情况而定。
在制作上述盖板时，可以先制作中间补强层2，然后再在中间补强层2上形成柔性填充部4、第一柔性平坦层1和第二柔性平坦层3，第一柔性平坦层1和第二柔性平坦层3能够使得中间补强层2的两侧平坦化。
本公开实施例提供的盖板中，如图2、图3、图4和图5所示，开槽21可以贯穿中间补强层2的通槽，即中间补强层2在弯折区B处断开，柔性填充部4填充到断开的中间补强层2之间，能够更好的保证弯折区B的弯折性能。
在中间补强层2在弯折区B断开的情况下，如图6、图7、图8和图9所示，开槽21的侧壁呈可与中间补强层2朝向第一柔性平坦层1的表面平滑过渡连接的圆弧过渡形，圆弧过渡形能够降低因中间补强层2拼接的状态而产生的不良光学影响，可提高显示模组的光学一致性。
另外，开槽21的设置方式还可以为凹槽，如图10、图11、图12和图13所示，开槽21设置在中间补强层2朝向第一柔性平坦层1的一侧，或者开槽21设置在中间补强层2朝向第二柔性平坦层3的一侧，即中间补强层2为非断开设计，可以对中间补强层2在弯折区B的部分进行刻蚀减薄，实现弯折区B的弯折性能，在这里不做限制，根据实际情况而定。
具体地，中间补强层2在弯折区B的部分刻蚀减薄后，中间补强层2位于弯折区B的部分沿第一方向的厚度可以分别小于等于第一柔性平坦层1和第二柔性平坦层3沿第一方向的厚度，能够提高弯折区B的弯折性能。第一方向为第一柔性平坦层1和第二柔性平坦层3的排列方向，即图中的竖直方向。
本公开实施例提供的盖板中，开槽21的槽体可延伸到展平区A，能够扩 大柔性填充部4的填充范围，可以更好的保证弯折区B的弯折性能。
本公开实施例提供的盖板中，开槽21相对的两个侧壁之间的距离沿开槽21的槽口(槽口指的是邻近第一柔性平坦层1的一侧)指向槽底(槽底指的是邻近第二柔性平坦层3的一侧)的方向逐渐减小，能够在涂布柔性填充部4时，保证开槽21内部完全填充。
本公开实施例提供的盖板中，柔性填充部4的材料折射率与中间补强层2的材料折射率需尽可能接近，可以降低弯折区B与展平区A之间过渡区域的材料不同造成的光学干涉问题，可提高显示模组的光学一致性。例如，柔性填充部4的折射率与中间补强层2的折射率可以相同，具体材料折射率数值可以设置为1.5。
本公开实施例提供的盖板中，柔性填充部4的材料可以与第一柔性平坦层1的材料相同。例如，第一柔性平坦层1和柔性填充部4可以为模量约为10MPa～500MPa的橡胶(TPU)材质或者其他高分子材料，中间补强层2可以为模量约为50GPa～90GPa的玻璃材质或其他高硬度材料，第二柔性平坦层3可以为模量约为2GPa～8Gpa的聚酰亚胺(PI)材质或其他高分子材料。
如图2、图3、图6、图7、图10、图11所示，当开槽21贯穿中间补强层2时或者开槽21位于中间补强层2临近第一柔性平坦层1的一侧时，柔性填充部4和第一柔性平坦层1可以通过一道工序制作，节省制作工艺。
可选地，柔性填充部4的材料也可以与第一柔性平坦层1的材料不相同，在这里不做限制，根据实际情况而定。
可选地，如图4、图5、图8、图9、图12和图13所示，第一柔性平坦层1的材料可以与第二柔性平坦层3的材料相同。例如，第一柔性平坦层1和第二柔性平坦层3可以为模量约为2GPa～8Gpa的聚酰亚胺(PI)材质或其他高分子材料，可以采用涂布工艺在中间补强层2的两侧表面形成第一柔性平坦层1和第二柔性平坦层3；中间补强层2可以为模量约为50GPa～90GPa的玻璃材质或其他高硬度材料，柔性填充部4可以为模量约为10MPa～500MPa的橡胶(TPU)材质或者其他高分子材料。
本公开实施例提供的盖板中，第一柔性平坦层1的厚度可以为30μm～80μm，中间补强层2位于展平区A的部分的厚度可以为80μm～300μm。当中间补强层2在弯折区B未断开时，中间补强层2位于弯折区B的部分的厚度可以为30μm～80μm，第二柔性平坦层3的厚度可以为30μm～80μm。第一柔性平坦层1、中间补强层2和第二柔性平坦层3的具体厚度在这里可以不做限制，根据实际情况而定。
具体地，在盖板边缘处，第一柔性平坦层1、中间补强层2和第二柔性平坦层3三层可以平齐设置，也可以不平齐设置。当不平齐设置时，第一柔性平坦层1和第二柔性平坦层3可以相对于中间补强层2内缩，也可以超出中间补强层2的边缘，将中间补强层2的边缘包裹起来。
本公开实施例提供的盖板中，如图3、图5、图7、图9、图11和图13所示，还可以包括位于第二柔性平坦层3远离中间补强层2一侧的防反射膜5，例如，AG膜，能够改善弯折区B与展平区A过渡区域的材料不同造成的光学干涉问题，可提高显示模组的光学一致性。其中，防反射膜5的厚度可以约为30μm～80μm，具体数值可以根据实际情况而定。
具体地，上述防反射膜5内部可以掺杂有折射粒子，折射粒子的折射率大于防反射膜的折射率。或者，防反射膜5临近第二柔性平坦层3的一侧具有用于防反射的凹凸结构，如图14所示，此凹凸结构可以为呈阵列分布的凸起51，凸起的形状可以为半球形、锯齿状或者方形等，在这里不做限制，根据实际情况而定。
本公开还提供一种显示模组，包括显示面板以及上述技术方案中提供的任意一种盖板，盖板的第一柔性平坦层1临近显示面板设置，盖板的第二柔性平坦层3远离显示面板设置。
具体地，上述显示模组具体为柔性显示模组，如图15所示，显示模组002自上而下可以包括盖板100，放在最外层保护模组中间的其他功能层，同时具有防指纹，耐刮擦等性能；光学胶层200，将盖板100和偏光片300粘结到一起；偏光片300，用于显示模组防反射，部分显示模组结构中可以无偏光片； 显示面板400，可提供显示及触控功能，具体为柔性显示面板；支撑件500，一般为膜层配合一起为模组提供支撑。可选地，显示模组还可以为其他结构，在这里不做限制，根据实际情况而定。
显然，本领域的技术人员可以对本公开实施例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 (14)

  1. 一种盖板，其中，所述盖板分为展平区以及与所述展平区连接的弯折区；
    所述盖板包括依次层叠设置的第一柔性平坦层、中间补强层和第二柔性平坦层；所述第一柔性平坦层被配置为临近显示面板设置，所述第二柔性平坦层被配置为远离所述显示面板设置，所述中间补强层具有覆盖所述弯折区的开槽，所述中间补强层的杨氏模量分别大于所述第一柔性平坦层的杨氏模量和所述第二柔性平坦层的杨氏模量；
    所述盖板还包括填充于所述开槽内的柔性填充部，所述柔性填充部的杨氏模量小于所述第二柔性平坦层的杨氏模量。
  2. 根据权利要求1所述的盖板，其中，所述开槽贯穿所述中间补强层。
  3. 根据权利要求2所述的盖板，其中，所述开槽的侧壁为与所述中间补强层朝向所述第一柔性平坦层的表面平滑过渡连接的圆弧过渡形。
  4. 根据权利要求1所述的盖板，其中，所述中间补强层朝向所述第一柔性平坦层的一侧具有所述开槽。
  5. 根据权利要求4所述的盖板，其中，所述中间补强层位于所述弯折区的部分沿第一方向的厚度分别小于等于所述第一柔性平坦层和第二柔性平坦层沿第一方向的厚度，所述第一方向为所述第一柔性平坦层和所述第二柔性平坦层的排列方向。
  6. 根据权利要求1所述的盖板，其中，所述开槽相对的两个侧壁之间的距离沿所述开槽的槽口指向槽底的方向逐渐减小。
  7. 根据权利要求1所述的盖板，其中，所述开槽的槽体延伸到所述展平区。
  8. 根据权利要求1-7任一项所述的盖板，其中，所述柔性填充部的折射率与所述中间补强层的折射率相同。
  9. 根据权利要求1-7任一项所述的盖板，其中，所述柔性填充部的材料 与所述第一柔性平坦层的材料相同。
  10. 根据权利要求1-7任一项所述的盖板，其中，所述第一柔性平坦层的材料与所述第二柔性平坦层的材料相同。
  11. 根据权利要求1-7任一项所述的盖板，其中，还包括位于所述第二柔性平坦层远离所述中间补强层一侧的防反射膜。
  12. 根据权利要求11所述的盖板，其中，所述防反射膜内部掺杂有折射粒子，所述折射粒子的折射率大于所述防反射膜的折射率。
  13. 根据权利要求11所述的盖板，其中，所述防反射膜临近所述第二柔性平坦层的一侧具有被配置为防反射的凹凸结构。
  14. 一种显示模组，其中，包括显示面板以及如权利要求1-13任一项所述的盖板，所述盖板的第一柔性平坦层临近所述显示面板设置，所述盖板的第二柔性平坦层远离所述显示面板设置。
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