WO2021077593A1 - 可折叠的支撑结构及显示装置 - Google Patents

可折叠的支撑结构及显示装置 Download PDF

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Publication number
WO2021077593A1
WO2021077593A1 PCT/CN2019/127302 CN2019127302W WO2021077593A1 WO 2021077593 A1 WO2021077593 A1 WO 2021077593A1 CN 2019127302 W CN2019127302 W CN 2019127302W WO 2021077593 A1 WO2021077593 A1 WO 2021077593A1
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WO
WIPO (PCT)
Prior art keywords
flexible substrate
bending
supporting portion
transition
supporting
Prior art date
Application number
PCT/CN2019/127302
Other languages
English (en)
French (fr)
Inventor
韩文
Original Assignee
武汉华星光电半导体显示技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 武汉华星光电半导体显示技术有限公司 filed Critical 武汉华星光电半导体显示技术有限公司
Priority to US16/772,812 priority Critical patent/US11523523B2/en
Publication of WO2021077593A1 publication Critical patent/WO2021077593A1/zh

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/0017—Casings, cabinets or drawers for electric apparatus with operator interface units
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D1/00—Pinless hinges; Substitutes for hinges
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G06F1/1652—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being flexible, e.g. mimicking a sheet of paper, or rollable
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1656—Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1675—Miscellaneous details related to the relative movement between the different enclosures or enclosure parts
    • G06F1/1681—Details related solely to hinges
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2999/00—Subject-matter not otherwise provided for in this subclass
    • 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

Definitions

  • This application relates to a mechanical structure, in particular to a foldable support structure and a display device.
  • the supporting structure for supporting the flexible display panel is relatively complicated, the process is time-consuming, and the cost is relatively high.
  • the embodiments of the present application provide a foldable support structure and a display device to solve the technical problem of a relatively complicated support structure in the existing foldable flexible display screen.
  • An embodiment of the present application provides a foldable support structure, wherein the support structure includes:
  • the flexible substrate is used to set an external object to be folded, and the side of the flexible substrate facing away from the object to be folded includes a bending zone, two transition zones, and two non-bending zones.
  • Each of the non-bending areas is located on both sides of the bending area, and the bending area and each of the non-bending areas are connected by one of the transition areas;
  • a first supporting portion the first supporting portion being fixedly arranged in each of the non-bending areas;
  • a second supporting portion, the second supporting portion is provided in each of the transition areas, and the second supporting portion is connected to the first supporting portion;
  • the thickness of the second support portion decreases gradually.
  • the second support portion includes a first surface facing the flexible substrate and a second surface facing away from the flexible substrate;
  • the first surface is parallel to the reference plane, so The height of the second side is decreasing.
  • the second supporting portion is fixedly connected to the first supporting portion, and the second supporting portion is suspended.
  • the flexible substrate when the support structure is folded, the flexible substrate forms a water drop-shaped bending structure in the transition zone and the bending zone, and the bending structure includes a bending structure corresponding to The transition section of the second support part and the arc section connected between the transition sections;
  • the length of the second support part is less than or equal to the length of the transition section.
  • the second surface is an inclined surface
  • the thickness of the flexible substrate is smaller than the thickness of the first support portion.
  • the thickness of the flexible substrate is between 20 ⁇ m and 50 ⁇ m, and the thickness of the first support portion is between 8 and 10 times the thickness of the flexible substrate.
  • the first support portion and the flexible substrate are fixedly connected by an adhesive layer.
  • the first supporting portion and the second supporting portion are integrally formed.
  • the material of the flexible substrate is one of metallic stainless steel, amorphous metal or spring steel sheet.
  • the embodiment of the present application also relates to a display device, which includes a flexible display panel and the foldable support structure of the above-mentioned embodiment, the flexible display panel is fixedly arranged on the support structure, and the support structure includes:
  • a second supporting portion, the second supporting portion is arranged on each of the transition areas, and the second supporting portion is connected to the first supporting portion;
  • the thickness of the second support portion decreases gradually.
  • the second supporting portion includes a first surface facing the flexible substrate and a second surface facing away from the flexible substrate;
  • the first surface is parallel to the reference plane, so The height of the second side is decreasing.
  • the second support portion is fixedly connected to the first support portion, and the second support portion is suspended.
  • the flexible substrate when the supporting structure is folded, the flexible substrate forms a water drop-shaped bending structure in the transition zone and the bending zone, and the bending structure includes a bending structure corresponding to The transition section of the second support part and the arc section connected between the transition sections;
  • the length of the second support part is less than or equal to the length of the transition section.
  • the second surface is an inclined surface.
  • the thickness of the flexible substrate is smaller than the thickness of the first support portion.
  • the thickness of the flexible substrate is between 20 ⁇ m and 50 ⁇ m, and the thickness of the first support portion is between 8 and 10 times the thickness of the flexible substrate.
  • the first support portion and the flexible substrate are fixedly connected by an adhesive layer.
  • the first support portion and the second support portion are integrally formed.
  • the material of the flexible substrate is one of metallic stainless steel, amorphous metal, or spring steel sheet.
  • the foldable support structure of the present application is advantageous for the flexible substrate and the external object to be folded arranged on the flexible substrate to be smoothly transitioned in the bending zone and the transition zone when the thickness of the second support part becomes thinner.
  • the standard water drop-like structure avoids the stress concentration and unsynchronized transition of the object to be folded and the flexible substrate at the step difference between the first support part and the flexible substrate during the bending process.
  • FIG. 1 is a schematic cross-sectional structure diagram of a foldable support structure in a flat state according to an embodiment of the application;
  • FIG. 2 is a schematic bottom view of a foldable support structure according to an embodiment of the application.
  • FIG. 3 is a schematic cross-sectional view of the foldable support structure in a folded state according to an embodiment of the application;
  • FIG. 4 is a schematic structural diagram of a display device according to an embodiment of the application.
  • the foldable support structure of the embodiment of the present application can be used in display technology, such as mobile phones, tablet computers, or TVs, and can also be used in other technical fields, such as foldable circuit boards.
  • FIG. 1 is a schematic cross-sectional structure diagram of the foldable support structure in a flat state according to an embodiment of the application
  • FIG. 2 is a bottom structure diagram of the foldable support structure according to an embodiment of the application.
  • the embodiment of the present application provides a foldable support structure 100 which includes a flexible substrate 11, a first support portion 12, a second support portion 13 and an adhesive layer 14.
  • the flexible substrate 11 is used to set an external object to be folded.
  • the side of the flexible substrate 11 facing away from the object to be folded includes a bending area D1, two transition areas D2, and two non-bending areas D3.
  • the two non-bending areas D3 are located on both sides of the bending area D1.
  • the bending area D1 and each non-bending area D3 are connected by a transition area D2.
  • the first supporting portion 12 is fixedly arranged on each non-bending area D3.
  • the second supporting portion 13 is arranged on each transition area D2.
  • the second supporting portion 13 is connected to the first supporting portion 12.
  • the first supporting portion 12 is fixedly connected to the flexible substrate 11 through the adhesive layer 14.
  • the thickness of the second support portion 13 decreases.
  • the foldable support structure 100 of the present application is arranged in decreasing order from the end close to the first support part 12 to the end close to the bending area D1, which is beneficial to the flexible substrate 11 and the arrangement on the flexible substrate 11.
  • the external object to be folded is folded, it can smoothly transition in the bending zone D1 and the transition zone D2 to form a standard drop-shaped structure, avoiding the flexible substrate 11 and the to-be-folded set on the flexible substrate 11 during the bending process
  • the object has stress concentration and unsynchronized transition.
  • the thickness of the second support portion 13 decreases from an end close to the first support portion 12 to an end close to the bending area D1. Since the second support portion 13 is gradually thinned in the transition zone D2, the stiffness and rigidity of the second support portion 13 are weakened to a certain extent, so that the second support portion 13 will undergo adaptive deformation under the action of external force. .
  • the flexible substrate 11 when the flexible substrate 11 is in the folded state, the two sides of the bending structure of the flexible substrate 11 are attached to and squeezed on the second support portion 13 at the transition area D2, and the second support portion 13 is bent The bending stress of the folded structure causes the deformation to open outwards.
  • the flexible substrate 11 can be smoothly supported by the second supporting portion 13, and the flexible substrate 11 corresponds to The parts in the transition zone D2 and the bending zone D1 smoothly transition into a water drop-shaped bending structure during the bending process, thereby protecting the flexible substrate 11.
  • the second supporting portion 13 includes a first surface 131 facing the flexible substrate 11 and a second surface 132 facing away from the flexible substrate 11.
  • the first surface 131 is parallel to the reference surface, and the height of the second surface 132 decreases.
  • the first surface 11 is parallel to the plane where the flexible substrate 11 is located, so that the distance between the second support portion 13 and the flexible substrate 11 is the shortest.
  • the second surface 132 is an inclined surface.
  • the arrangement of the second surface 132 as an inclined surface makes the connection between the first support portion 12 and the second support portion 13 smoother, and the arrangement of the inclined surface makes the second surface 132 flexible when supporting the folded object to be folded or the flexible substrate 11
  • the portion of the base 11 corresponding to the transition zone D2 and the bending zone D1 transitions into a drop-shaped bending structure more smoothly during the bending process.
  • the second surface 132 may also be a concave arc surface or a convex arc surface. The arrangement of the concave arc surface fits more closely to the drop-like structure formed when the flexible substrate is folded, and prevents the flexible substrate 11 from receiving a relatively large reaction force from the second surface 132 when the flexible substrate 11 is folded.
  • the second supporting portion 13 is fixedly connected to the first supporting portion 12, and the second supporting portion 13 is suspended.
  • the suspended arrangement of the second support portion 13 improves the degree of freedom of the second support portion 13, that is, when the second support portion 13 is squeezed by an external force, the second support portion 13 rapidly deforms outward, which is beneficial to it.
  • the rapid opening causes the bending structure of the flexible substrate 11 to naturally form a drop shape.
  • the flexible substrate 11 when the support structure 100 is folded, the flexible substrate 11 forms a water drop-shaped bending structure 20 in the transition zone D2 and the bending zone D1.
  • the bending structure 20 includes a transition section 111 attached to the first surface 131 and a circular arc section 112 connected between the transition sections 111.
  • the transition section 111 and the arc section 112 are also in a flat state, and the two are suspended.
  • the transition section 111 is attached to the second support portion 13 at the transition area D2.
  • the bending structure 20 has an outward stress, so that the bending structure 20 abuts the second support portion 13, and the second support portion 13 is deformed outwardly due to the force. That is to say, the second supporting portion 13 is forced to produce an outward opening effect, which releases part of the stress generated by the bending structure 20, thereby protecting the substrate 11 to be flexible.
  • the length of the second supporting portion 13 is less than or equal to the length of the transition section 111. This setting avoids waste of materials.
  • the length of the second supporting portion 13 is equal to the length of the transition section 111.
  • the thickness of the flexible substrate 11 is smaller than the thickness of the first support portion 12.
  • the thickness of the flexible substrate 11 is designed to be small, so that the flexible substrate 11 has better bending performance.
  • the thickness of the first supporting portion 12 is designed to be relatively large, so that the first supporting portion 12 has better stiffness and supporting performance.
  • the thickness of the flexible substrate 11 is between 20 ⁇ m and 50 ⁇ m.
  • the thickness of the first support portion 12 is between 8 to 10 times the thickness of the flexible substrate 11.
  • the flexible base 11 is 0.03 mm, and the first supporting portion 12 is 0.3 mm.
  • the material of the flexible substrate 11 is one of metallic stainless steel, amorphous metal, or spring steel sheet.
  • the material of the first supporting portion 12 and the second supporting portion 13 is also one of metallic stainless steel, amorphous metal or spring steel sheet.
  • the materials of the first support portion 12 and the second support portion 13 may be the same or different.
  • the first supporting portion 12 and the second supporting portion 13 are integrally formed.
  • the first supporting portion 12 and the second supporting portion 13 may also be fixedly connected together separately.
  • the object to be folded due to the good strength and stiffness of the metal material and the amorphous metal material, the object to be folded can be quickly restored to flatness, the appearance of ripples can be reduced, and the object to be folded has high stiffness.
  • the flexible substrate 11 and the first supporting portion 12 may be pasted by double-sided adhesive or optical adhesive, or they may be integrated by dispensing, or integrated by nano-injection molding, or integrated by etching.
  • the formation process of the supporting structure 100 of this embodiment is as follows: firstly, a flexible substrate 11 and a supporting plate are provided, and the part of the supporting plate close to the transition zone D2 is ground to form a tapered structure.
  • the thin structure is the second supporting part 13, and the unground part is the first supporting part 12; then the adhesive layer 14 is coated on the first supporting part 12.
  • the flexible substrate 11 is attached to the adhesive layer 14. This completes the formation process of the support structure of this embodiment.
  • the supporting structure 100 can also directly etch the part of the supporting plate corresponding to the transition area D2 by etching, so that this part forms the second supporting part 13 of the thinned structure, so as to realize the first supporting part 12 and Integration of the second support part 13.
  • UV curing adhesive in the transition area, and UV curing irradiation can be performed while coating. Because the UV curing adhesive is a liquid, it will automatically flow to the bending area D3, and it will gradually become thinner. During the process, when the amount of UV-curable glue is controlled to reach the bending zone D3, the thickness gradually becomes zero.
  • FIG. 4 is a schematic structural diagram of a display device according to an embodiment of the present application.
  • the embodiment of the present application also relates to a display device 1000, which includes a flexible display panel 200 and the foldable support structure 100 of the above-mentioned embodiment, and the flexible display panel 200 is fixedly disposed on a flexible substrate of the support structure 100.
  • the specific structure of the foldable support structure 100 is the same as or similar to the structure of the foldable support structure 100 of the above-mentioned embodiment.
  • the display device 1000 includes from bottom to top a bottom frame 101, a power supply structure layer 102, a heat dissipation layer 103, a support structure 100, a first adhesive layer 104, a back plate 105, a second adhesive layer 106, a flexible display panel 200, The third adhesive layer 201, the polarizer 202, the fourth adhesive layer 203 and the cover plate 204.
  • the foldable support structure of the present application is advantageous for the flexible substrate and the external object to be folded arranged on the flexible substrate to be smoothly transitioned in the bending zone and the transition zone when the thickness of the second support part becomes thinner.
  • the standard water drop-like structure avoids the stress concentration and unsynchronized transition of the object to be folded and the flexible substrate at the step difference between the first support part and the flexible substrate during the bending process.

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Mechanical Engineering (AREA)

Abstract

一种可折叠的支撑结构（100）及柔性显示装置（1000），支撑结构（100）包括柔性基底（11），柔性基底（11）包括弯折区（D1）、过渡区（D2）和非弯折区（D3），非弯折区（D3）位于弯折区（D1）的两侧且其通过过渡区（D2）与非弯折区（D3）相连；第一支撑部（12）设置在非弯折区（D3）；第二支撑部（13）设置在过渡区（D2）且与第一支撑部（12）相连；自靠近非弯折区（D3）的一端向靠近弯折区（D1）的一端，第二支撑部（13）的厚度递减。

Description

可折叠的支撑结构及显示装置 技术领域
本申请涉及一种机械结构，特别涉及一种可折叠的支撑结构及显示装置。
 背景技术
随着柔性显示装置应用市场越来越受市场青睐，折叠式柔性显示屏的折叠性能也备受关注。
但是现在的折叠式柔性显示屏中，其支撑柔性显示面板的支撑结构较为复杂，工艺耗时较大，成本较高。
 技术问题
本申请实施例提供一种可折叠的支撑结构及显示装置，以解决现有的折叠式柔性显示屏中支撑结构较为复杂的技术问题。
 技术解决方案
本申请实施例提供一种可折叠的支撑结构，其中，所述支撑结构包括：
柔性基底，所述柔性基底用于设置外置的待折叠对象，所述柔性基底背向所述待折叠对象的一侧包括一个弯折区、两个过渡区和两个非弯折区，两个所述非弯折区分别位于所述弯折区的两侧，所述弯折区和每一所述非弯折区通过一个所述过渡区相连；
第一支撑部，所述第一支撑部固定设置在每一所述非弯折区；以及
第二支撑部，所述第二支撑部设置在每一所述过渡区，所述第二支撑部与所述第一支撑部相连；
自靠近所述非弯折区的一端向靠近所述弯折区的一端，所述第二支撑部的厚度递减。
在本申请的可折叠的支撑结构中，所述第二支撑部包括一朝向所述柔性基底的第一面和背向所述柔性基底的第二面；
在平展状态下，以所述柔性基底所在的平面为基准面，自靠近所述非弯折区的一端向靠近所述弯折区的一端，所述第一面平行于所述基准面，所述第二面的高度递减。
在本申请的可折叠的支撑结构中，所述第二支撑部固定连接于所述第一支撑部，且所述第二支撑部悬空设置。
在本申请的可折叠的支撑结构中，当所述支撑结构折叠时，所述柔性基底在所述过渡区和弯折区的部分形成水滴状的弯折结构，所述弯折结构包括对应于所述第二支撑部的过渡段和相连在所述过渡段之间的圆弧段；
其中所述第二支撑部的长度小于或等于所述过渡段的长度。
在本申请的可折叠的支撑结构中，所述第二面为一斜面。
在本申请的可折叠的支撑结构中，所述柔性基底的厚度小于所述第一支撑部的厚度。
在本申请的可折叠的支撑结构中，所述柔性基底的厚度介于20微米至50微米之间，所述第一支撑部的厚度介于所述柔性基底厚度的8至10倍之间。
在本申请的可折叠的支撑结构中，所述第一支撑部和所述柔性基底通过黏胶层固定连接。
在本申请的可折叠的支撑结构中，所述第一支撑部和所述第二支撑部一体成型。
在本申请的可折叠的支撑结构中，所述柔性基底的材料为金属不锈钢、非晶金属或弹簧钢片中的一种。
本申请实施例还涉及一种显示装置，其包括柔性显示面板和上述实施例的可折叠的支撑结构，所述柔性显示面板固定设置所述支撑结构上，所述支撑结构包括:
柔性基底，所述柔性基底上设置有所述柔性显示面板，所述柔性基底背向所述待折叠对象的一侧包括一个弯折区、两个过渡区和两个非弯折区，两个所述非弯折区分别位于所述弯折区的两侧，所述弯折区和每一所述非弯折区通过一个所述过渡区相连；
第一支撑部，所述第一支撑部固定设置在每一所述非弯折区上；以及
第二支撑部，所述第二支撑部设置在每一所述过渡区上，所述第二支撑部与所述第一支撑部相连；
自靠近所述非弯折区的一端向靠近所述弯折区的一端，所述第二支撑部的厚度递减。
在本申请的所述的显示装置中，所述第二支撑部包括一朝向所述柔性基底的第一面和背向所述柔性基底的第二面；
在平展状态下，以所述柔性基底所在的平面为基准面，自靠近所述非弯折区的一端向靠近所述弯折区的一端，所述第一面平行于所述基准面，所述第二面的高度递减。
在本申请的所述的显示装置中，所述第二支撑部固定连接于所述第一支撑部，且所述第二支撑部悬空设置。
在本申请的所述的显示装置中，当所述支撑结构折叠时，所述柔性基底在所述过渡区和弯折区的部分形成水滴状的弯折结构，所述弯折结构包括对应于所述第二支撑部的过渡段和相连在所述过渡段之间的圆弧段；
其中所述第二支撑部的长度小于或等于所述过渡段的长度。
在本申请的所述的显示装置中，所述第二面为一斜面。
在本申请的所述的显示装置中，所述柔性基底的厚度小于所述第一支撑部的厚度。
在本申请的所述的显示装置中，所述柔性基底的厚度介于20微米至50微米之间，所述第一支撑部的厚度介于所述柔性基底厚度的8至10倍之间。
在本申请的所述的显示装置中，所述第一支撑部和所述柔性基底通过黏胶层固定连接。
在本申请的所述的显示装置中，所述第一支撑部和所述第二支撑部一体成型。
在本申请的所述的显示装置中，所述柔性基底的材料为金属不锈钢、非晶金属或弹簧钢片中的一种。
 有益效果
本申请的可折叠的支撑结构通过第二支撑部厚度渐薄的设置有利于柔性基底以及设置在柔性基底上的外置的待折叠对象在折叠时，能平顺过渡在弯折区和过渡区形成标准的水滴状结构，避免了在弯折过程中待折叠对象以及柔性基底在第一支撑部和柔性基底的段差处出现应力集中与过渡不同步的情况。
 附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面对实施例中所需要使用的附图作简单的介绍。下面描述中的附图仅为本申请的部分实施例，对于本领域普通技术人员而言，在不付出创造性劳动的前提下，还可以根据这些附图获取其他的附图。
图1为本申请实施例的可折叠的支撑结构处于平展状态的剖视结构示意图；
图2为本申请实施例的可折叠的支撑结构的仰视结构示意图；
图3为本申请实施例的可折叠的支撑结构处于折叠状态的剖视结构示意图；
图4为本申请实施例的显示装置的结构示意图。
 本发明的实施方式
请参照附图中的图式，其中相同的组件符号代表相同的组件。以下的说明是基于所例示的本申请具体实施例，其不应被视为限制本申请未在此详述的其它具体实施例。
需要说明的是，本申请实施例的可折叠的支撑结构可以用于显示技术，比如手机、平板电脑或电视等，也可以用于其他技术领域，比如可折叠的电路板等等。
请参照图1，图1为本申请实施例的可折叠的支撑结构处于平展状态的剖视结构示意图；图2为本申请实施例的可折叠的支撑结构的仰视结构示意图。
本申请实施例提供一种可折叠的支撑结构100，其包括柔性基底11、第一支撑部12、第二支撑部13和黏胶层14。柔性基底11用于设置外置的待折叠对象。
柔性基底11背向待折叠对象的一侧包括一弯折区D1、两个过渡区D2和两个非弯折区D3。两个非弯折区D3位于弯折区D1的两侧。弯折区D1和每一非弯折区D3通过一个过渡区D2相连。第一支撑部12固定设置在每一非弯折区D3上。第二支撑部13设置在每一过渡区D2上。第二支撑部13与第一支撑部12相连。第一支撑部12通过黏胶层14和柔性基底11固定连接。
自靠近非弯折区D3的一端向靠近弯折区D1的一端，第二支撑部13的厚度递减。
本申请的可折叠的支撑结构100通过第二支撑部13的厚度，自靠近第一支撑部12的一端向靠近弯折区D1的一端递减的设置有利于柔性基底11和设置在柔性基底11上的外置的待折叠对象在折叠时，能平顺过渡在弯折区D1和过渡区D2形成标准的水滴状结构，避免了在弯折过程中柔性基底11和设置在柔性基底11上的待折叠对象在第一支撑部12和柔性基底11的段差处出现应力集中与过渡不同步的情况。
在本申请的可折叠的支撑结构100中，第二支撑部13的厚度自靠近第一支撑部12的一端向靠近弯折区D1的一端递减。由于第二支撑部13在过渡区D2中呈渐薄设置，在一定程度上减弱了第二支撑部13的挺性和刚性，使得第二支撑部13在外力的作用下会发生适应性的形变。比如，请参照图3，柔性基底11在折叠状态时，柔性基底11的弯折结构的两侧在过渡区D2处贴附并挤压在第二支撑部13上，第二支撑部13受到弯折结构的弯折应力，而发生向外打开的形变，其中厚度越薄的部分被挤压打开的距离越大，因此柔性基底11在第二支撑部13能平滑的支撑下，柔性基底11对应于过渡区D2和弯折区D1的部分在弯折过程中更为平滑地过渡为水滴状的弯折结构，进而保护柔性基底11。
具体的，第二支撑部13包括一朝向柔性基底11的第一面131和背向柔性基底11的第二面132。在平展状态时，以柔性基底11所在的平面为基准面，自靠近非弯折区D3的一端向靠近弯折区D1的一端，第一面131平行于基准面，第二面132的高度递减。
其中，第一面11平行于柔性基底11所在的平面，使得第二支撑部13和柔性基底11的距离最短，当有手指等外物按压对应于过渡段D2的柔性基底11或外置待折叠对象时，便于第二支撑部13迅速地支撑柔性基底11，且提高按压体验。
第二面132为一斜面。第二面132为斜面的设置使得第一支撑部12和第二支撑部13的衔接更加的平滑，且斜面的设置使得第二面132在支撑折叠的待折叠对象或柔性基底11时，使得柔性基底11对应于过渡区D2和弯折区D1的部分在弯折过程中更为平滑地过渡为水滴状的弯折结构。在一些实施例中，第二面132也可以是凹弧面或凸弧面。凹弧面的设置更加贴合于柔性基底在折叠时形成的水滴状结构，避免柔性基底11在折叠时受到第二面132较大的反作用力。
进一步的，第二支撑部13固定连接于第一支撑部12，且第二支撑部13悬空设置。第二支撑部13的悬空设置提高了第二支撑部13的自由度，即当第二支撑部13受到外力挤压时，第二支撑部13迅速地发生向外的形变，也即有利于其迅速地被打开，促使柔性基底11的弯折结构自然的形成水滴状。
比如，请参照图3，在本申请的可折叠的支撑结构100中，当支撑结构100折叠时，柔性基底11在过渡区D2和弯折区D1的部分形成水滴状的弯折结构20。弯折结构20包括贴覆于第一面131的过渡段111和相连在过渡段111之间的圆弧段112。当待柔性基底11处于平展状态时，过渡段111和圆弧段112也呈平展状态，且二者呈悬空设置。
柔性基底11在折叠状态时，过渡段111在过渡区D2处贴覆在第二支撑部13上。其中由于柔性基底11在形成弯折结构20时，弯折结构20具有向外的应力，使得弯折结构20抵顶第二支撑部13，第二支撑部13受力产生形变向外偏移，也就是说第二支撑部13受力产生了向外打开的效果，释放了弯折结构20产生的部分应力，进而保护待柔性基底11。
进一步的，第二支撑部13的长度小于或等于过渡段111的长度。该设置避免材料的浪费。可选的，第二支撑部13的长度等于过渡段111的长度。
在本申请的可折叠的支撑结构100中，柔性基底11的厚度小于第一支撑部12的厚度。柔性基底11的厚度设计为较小，以使得柔性基底11具有较好的弯折性能。而第一支撑部12的厚度设计为较大，以使第一支撑部12具有较好的挺性和支撑性能。
具体的，柔性基底11的厚度介于20微米至50微米之间。第一支撑部12的厚度介于柔性基底11厚度的8至10倍之间。可选的，柔性基底11为0.03毫米，第一支撑部12为0.3毫米。
可选的，柔性基底11的材料为金属不锈钢、非晶金属或弹簧钢片中的一种。第一支撑部12和第二支撑部13的材料也为金属不锈钢、非晶金属或弹簧钢片中的一种。第一支撑部12和第二支撑部13的材料可以相同也可以不同。在本实施例中，第一支撑部12和第二支撑部13一体成型。当然第一支撑部12和第二支撑部13也可以是分体固定连接在一起。
其中，由于金属材料和非晶金属材料的强度和挺性较好，能使得待折叠对象迅速恢复平坦，减缓出现波纹，且使待折叠对象具有高挺性。
另外，柔性基底11和第一支撑部12可以通过双面胶或光学胶粘贴，也可以通过点胶的方式结合为一体，或采用纳米注塑一体成型，或采用刻蚀一体成型。
本实施例的支撑结构100的形成过程是：首先，提供一柔性基底11和一支撑板，将支撑板靠近位于过渡区D2的部分进行研磨，以使该部分形成渐薄的结构，其中该渐薄的结构为第二支撑部13，未研磨的部分为第一支撑部12；然后在第一支撑部12上涂布黏胶层14。最后，将柔性基底11贴合在黏胶层14上。这样便完成了本实施例的支撑结构的形成过程。
当然，支撑结构100也可以是直接采用刻蚀的方式将支撑板对应于过渡区D2的部分进行刻蚀，使得该部分形成减薄结构的第二支撑部13，以实现第一支撑部12和第二支撑部13的一体化。
另外，还可以通过在过渡区涂布紫外光固化胶，可以边涂布边进行紫外光固化照射固化，因紫外光固化胶是液体，会自动流动至弯折区D3，且是逐渐变薄的过程，再通过控制紫外光固化胶量达到在弯折区D3时，厚度逐渐变为零。
请参照图4，图4为本申请实施例的显示装置的结构示意图。本申请实施例还涉及一种显示装置1000，其包括柔性显示面板200和上述实施例的可折叠的支撑结构100，柔性显示面板200固定设置支撑结构100的柔性基底上。
可折叠的支撑结构100的具体结构与上述实施例的可折叠的支撑结构100的结构相同或相似，具体阐述请参照上述实施例的内容，此处不再赘述。
其中，显示装置1000自下而上包括底框101、电源结构层102、散热层103、支撑结构100、第一黏胶层104、背板105、第二黏胶层106、柔性显示面板200、第三黏胶层201、偏光片202、第四黏胶层203和盖板204。
本申请的可折叠的支撑结构通过第二支撑部厚度渐薄的设置有利于柔性基底以及设置在柔性基底上的外置的待折叠对象在折叠时，能平顺过渡在弯折区和过渡区形成标准的水滴状结构，避免了在弯折过程中待折叠对象以及柔性基底在第一支撑部和柔性基底的段差处出现应力集中与过渡不同步的情况。以上所述，对于本领域的普通技术人员来说，可以根据本申请的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本申请后附的权利要求的保护范围。

Claims (20)

  1. 一种可折叠的支撑结构，其中，所述支撑结构包括：
    柔性基底，所述柔性基底用于设置外置的待折叠对象，所述柔性基底背向所述待折叠对象的一侧包括一个弯折区、两个过渡区和两个非弯折区，两个所述非弯折区分别位于所述弯折区的两侧，所述弯折区和每一所述非弯折区通过一个所述过渡区相连；
    第一支撑部，所述第一支撑部固定设置在每一所述非弯折区上；以及
    第二支撑部，所述第二支撑部设置在每一所述过渡区上，所述第二支撑部与所述第一支撑部相连；
    自靠近所述非弯折区的一端向靠近所述弯折区的一端，所述第二支撑部的厚度递减。
  2. 根据权利要求1所述的可折叠的支撑结构，其中，所述第二支撑部包括一朝向所述柔性基底的第一面和背向所述柔性基底的第二面；
    在平展状态下，以所述柔性基底所在的平面为基准面，自靠近所述非弯折区的一端向靠近所述弯折区的一端，所述第一面平行于所述基准面，所述第二面的高度递减。
  3. 根据权利要求1所述的可折叠的支撑结构，其中，所述第二支撑部固定连接于所述第一支撑部，且所述第二支撑部悬空设置。
  4. 根据权利要求3所述的可折叠的支撑结构，其中，当所述支撑结构折叠时，所述柔性基底在所述过渡区和弯折区的部分形成水滴状的弯折结构，所述弯折结构包括对应于所述第二支撑部的过渡段和相连在所述过渡段之间的圆弧段；
    所述第二支撑部的长度小于或等于所述过渡段的长度。
  5. 根据权利要求2所述的可折叠的支撑结构，其中，所述第二面为一斜面。
  6. 根据权利要求1所述的可折叠的支撑结构，其中，所述柔性基底的厚度小于所述第一支撑部的厚度。
  7. 根据权利要求6所述的可折叠的支撑结构，其中，所述柔性基底的厚度介于20微米至50微米之间，所述第一支撑部的厚度介于所述柔性基底厚度的8至10倍之间。
  8. 根据权利要求3所述的可折叠的支撑结构，其中，所述第一支撑部和所述柔性基底通过黏胶层固定连接。
  9. 根据权利要求1所述的可折叠的支撑结构，其中，所述第一支撑部和所述第二支撑部一体成型。
  10. 根据权利要求1所述的可折叠的支撑结构，其中，所述柔性基底的材料为金属不锈钢、非晶金属或弹簧钢片中的一种。
  11. 一种显示装置，其中，包括柔性显示面板和支撑结构，所述柔性显示面板固定设置所述支撑结构上；所述支撑结构包括：
    柔性基底，所述柔性基底上设置有所述柔性显示面板，所述柔性基底背向所述待折叠对象的一侧包括一个弯折区、两个过渡区和两个非弯折区，两个所述非弯折区分别位于所述弯折区的两侧，所述弯折区和每一所述非弯折区通过一个所述过渡区相连；
    第一支撑部，所述第一支撑部固定设置在每一所述非弯折区上；以及
    第二支撑部，所述第二支撑部设置在每一所述过渡区上，所述第二支撑部与所述第一支撑部相连；
    自靠近所述非弯折区的一端向靠近所述弯折区的一端，所述第二支撑部的厚度递减。
  12. 根据权利要求11所述的显示装置，其中，所述第二支撑部包括一朝向所述柔性基底的第一面和背向所述柔性基底的第二面；
    在平展状态下，以所述柔性基底所在的平面为基准面，自靠近所述非弯折区的一端向靠近所述弯折区的一端，所述第一面平行于所述基准面，所述第二面的高度递减。
  13. 根据权利要求11所述的显示装置，其中，所述第二支撑部固定连接于所述第一支撑部，且所述第二支撑部悬空设置。
  14. 根据权利要求13所述的显示装置，其中，当所述支撑结构折叠时，所述柔性基底在所述过渡区和弯折区的部分形成水滴状的弯折结构，所述弯折结构包括对应于所述第二支撑部的过渡段和相连在所述过渡段之间的圆弧段；
    所述第二支撑部的长度小于或等于所述过渡段的长度。
  15. 根据权利要求12所述的显示装置，其中，所述第二面为一斜面。
  16. 根据权利要求11所述的显示装置，其中，所述柔性基底的厚度小于所述第一支撑部的厚度。
  17. 根据权利要求16所述的显示装置，其中，所述柔性基底的厚度介于20微米至50微米之间，所述第一支撑部的厚度介于所述柔性基底厚度的8至10倍之间。
  18. 根据权利要求13所述的显示装置，其中，所述第一支撑部和所述柔性基底通过黏胶层固定连接。
  19. 根据权利要求11所述的显示装置，其中，所述第一支撑部和所述第二支撑部一体成型。
  20. 根据权利要求11所述的显示装置，其中，所述柔性基底的材料为金属不锈钢、非晶金属或弹簧钢片中的一种。
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