WO2022041313A1 - 折叠显示装置 - Google Patents

折叠显示装置 Download PDF

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Publication number
WO2022041313A1
WO2022041313A1 PCT/CN2020/113798 CN2020113798W WO2022041313A1 WO 2022041313 A1 WO2022041313 A1 WO 2022041313A1 CN 2020113798 W CN2020113798 W CN 2020113798W WO 2022041313 A1 WO2022041313 A1 WO 2022041313A1
Authority
WO
WIPO (PCT)
Prior art keywords
folding
display device
support plate
frame body
display panel
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2020/113798
Other languages
English (en)
French (fr)
Inventor
汪文强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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 Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to US17/254,266 priority Critical patent/US11886248B2/en
Publication of WO2022041313A1 publication Critical patent/WO2022041313A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F1/1641—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being formed by a plurality of foldable display components
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • 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
    • G09F9/33—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 being semiconductor devices, e.g. diodes

Definitions

  • the present application relates to the field of display technology, and in particular, to a folding display device.
  • foldable display devices are popular among users because of their full sense of technology, fashion and convenience. and widely favored by manufacturers.
  • foldable mobile phones show many advantages compared to traditional mobile phones, such as: realizing the expandability of the screen, having a thinner and lighter volume, reducing power consumption, and improving the battery life of the device.
  • OLED Organic Light Emitting Diode
  • Folding display devices in the prior art generally use a two-layer support structure to support the flexible display panel, wherein a layer close to the flexible display panel is a metal sheet, and a layer below the metal sheet is a two-segment support plate.
  • the support plate itself is not bendable, but the bendability is achieved through the gap between its two sections.
  • the folding display device with this structure has the following problems: the metal sheet attached to the flexible display panel itself has poor ductility, and when it is bent with the flexible display panel, the flexible display panel will be squeezed, thereby increasing the size of the display device.
  • the two-segment support plate has a step difference in the middle bending area, which causes the flatness of the display device and the screen to be poor; at the same time, the support structure of the metal sheet and the support plate will also lead to folding.
  • the overall thickness of the display device is relatively large, which is not conducive to realizing the light and thin design of the display device.
  • the folding display device in the prior art adopts a two-layer support structure to support the flexible display panel, one layer of which is a metal sheet, and the other layer is a two-segment support plate; the support structure has the following problems: poor ductility of the metal sheet causes the flexible display panel to be squeezed. The problem of pressure, and there is a step difference in the middle bending area of the two-segment support plate, resulting in the problem that the flatness of the display device and the flatness of the screen are both poor, and the thickness of the support structure is large, which does not meet the lightness and thinness of the display device. development direction.
  • the present application provides a foldable display device that supports the display panel by arranging a support plate with an extensible hollow structure, which solves the problem of the support structure in the prior art having a large thickness, poor flatness and easy extrusion. The problem of pressing the display panel.
  • the present application provides a folding display device, including:
  • a display panel including at least a flexible display area
  • the support plate is arranged below the display panel and is used for supporting the display panel.
  • the support plate includes a bending area corresponding to the flexible display area, and the bending area has an extensible hollow structure.
  • the support plate further includes a non-bending area
  • the hollow structure includes a solid portion and a hollow portion, and the solid portion is connected to the non-bending area.
  • the solid portion is a network-like structure, and the voids enclosed by the solid portion constitute the hollow portion.
  • the solid portion includes a plurality of interwoven and connected strip-shaped entities, and the strip-shaped entities are curved in shape.
  • the hollow portion includes a plurality of first repeating units, and the first repeating units have arc-shaped edges.
  • the first repeating unit includes a first arc-shaped edge and a second arc-shaped edge connecting two adjacent first arc-shaped edges.
  • the first repeating unit includes three of the first arc-shaped edges and three of the second arc-shaped edges connecting the first arc-shaped edges, the first arc-shaped edges
  • the curved edges form three ends of the first repeating unit, and the second arcuate edges form three sides of the first repeating unit.
  • the first repeating unit when the supporting plate is in a fully unfolded state, is a center-symmetric structure.
  • the symmetry centers of the six adjacent first repeating units surrounding the same first repeating unit are located on the same circle.
  • the flexible display area is located at a middle position in the length direction of the display panel; the bending area is located at the middle position in the length direction of the support plate.
  • the flexible display area is located at a position close to one side edge of the display panel; the bending area is located at a position close to one side edge of the support plate.
  • the display panel includes a plurality of the flexible display regions
  • the support plate includes a plurality of the bending regions corresponding to the flexible display regions
  • a plurality of the bending regions are connected by non-bending regions.
  • the hollow portion penetrates the support plate along the thickness direction of the support plate.
  • the support plate and the display panel are bonded by a flexible glue, and at least at a position corresponding to the flexible display area of the display panel, the flexible glue has a flexible glue bendability.
  • the folding display device further includes:
  • the back frame assembly includes a folding shaft and a back plate connected to both sides of the folding shaft, the folding shaft is disposed corresponding to the bending area;
  • the front frame assembly is arranged above the display panel, the front frame assembly includes a first frame body and a second frame body, the first frame body and the second frame body are rotatably connected, and the first frame body and the second frame body are rotatably connected.
  • the connection between a frame body and the second frame body corresponds to the bending area.
  • the folding shaft is arranged at a middle position in the longitudinal direction of the back frame assembly; or the folding shaft is arranged at a position close to one side edge of the back frame assembly.
  • the back frame assembly includes a plurality of the folding shafts, and the plurality of the folding shafts are connected by the back plate.
  • connection between the first frame body and the second frame body is located in the middle of the length direction of the front frame assembly; or the first frame body and the second frame body
  • the connection point of the frame body is located at a position close to one side edge of the front frame assembly.
  • the present application also provides a folding display device, which includes:
  • a back frame assembly which includes a folding shaft and a back plate connected to both sides of the folding shaft;
  • a support plate which is arranged on the back frame assembly, and includes a bending area corresponding to the folding shaft, and the bending area has an extensible hollow structure
  • a display panel disposed on the support plate, at least including a flexible display area, and the folding shaft and the bending area are both disposed corresponding to the flexible display area;
  • the front frame assembly is arranged above the display panel and includes a first frame body and a second frame body, the first frame body and the second frame body are rotatably connected, and the first frame body and the second frame body are rotatably connected.
  • the connection of the second frame body corresponds to the bending area;
  • the hollow structure includes a solid portion and a hollow portion, the solid portion is connected with the non-bending area of the support plate, the solid portion includes a plurality of interwoven and connected strip-shaped entities, and the solid portion encloses a The void constitutes the hollow portion.
  • the foldable display device provided by the application includes a display panel and a support plate for supporting the display panel, the support plate is provided with a bending area corresponding to the flexible display area of the display panel.
  • the extensible hollow structure is arranged in the area, which improves the deformation ability and extensibility of the bending area. The crushing force to be endured reduces the risk of interlayer peeling or cracking; at the same time, the integrated support plate improves the flatness of the display panel and reduces the overall thickness of the display device.
  • FIG. 1 is an exploded view of the structure of a folding display device provided by an embodiment of the present application
  • FIG. 2 is a schematic structural diagram of a support plate provided by an embodiment of the present application.
  • FIG. 3 is a partial enlarged view of the bending area of the support plate provided by the embodiment of the present application.
  • FIG. 4 is a partial enlarged view of the hollow structure of the support plate provided by the embodiment of the present application.
  • FIG. 5 is a schematic cross-sectional structure diagram of a display panel provided by an embodiment of the present application.
  • FIG. 6 is a comparison diagram of the interlayer stress of the thin film encapsulation layer during the bending process of the folding display device of the prior art and the folding display device of the present application;
  • FIG. 7 is a comparison diagram of the interlayer stress of the light-emitting layer during the bending process of the folding display device of the prior art and the folding display device of the present application.
  • An embodiment of the present application provides a folding display device, the folding display device includes a display panel and a support plate for supporting the display panel, the support plate is provided with a flexible display area corresponding to the display panel In the bending area, by arranging a hollow structure with ductility in the bending area, the deformation ability and the ductility of the bending area are improved, and compared with the prior art, the bending of the folding display device is reduced.
  • the pressing force on the display panel reduces the risk of interlayer peeling; meanwhile, the flatness of the display panel is improved, and the overall thickness of the display device is reduced.
  • FIG. 1 is an exploded view of the structure of a folding display device provided by an embodiment of the present application.
  • the folding display device includes a display panel 30 and a support plate 20 disposed below the display panel 30 .
  • the display panel 30 may be an organic light emitting diode display panel; the display panel 30 includes at least one flexible display area, and during the bending process of the folded display device, the display panel 30 moves along the flexible display area. bending.
  • the flexible display area may be located in the middle of the length direction of the display panel 30 to achieve symmetrical folding of the folding display device; the flexible display area may also be located at a position near the display panel 30 The position of the side edge can realize the asymmetrical folding of the folding display device; the display panel can also include a plurality of the flexible display areas, so as to realize the multiple folding of the folding display device.
  • the support plate 20 is disposed on the lower side of the display panel 30 to support the display panel 30 .
  • the support plate 20 and the display panel 30 may be bonded by a flexible glue, and at least at a position corresponding to the flexible display area of the display panel 30 , the flexible glue has bendability.
  • the support plate 20 includes a bending area 20a and a non-bending area 20b, and the bending area 20a is disposed corresponding to the flexible display area of the display panel 30 .
  • the supporting plate 20 is bent along the bending area 20a.
  • the bending area 20a may be located in the middle of the length direction of the support plate 20, and the non-bending area 20b is connected to opposite ends of the bending area 20a.
  • the bending of the folding area 20a can realize the symmetrical folding of the folding display device; the bending area 20a can also be located at a position close to one side edge of the supporting plate 20, and the non-bending area 20b is connected to the The opposite ends or one end of the bending area 20a is used to realize the asymmetric folding of the folding display device; the support plate 20 may also include a plurality of the bending areas 20a, between the bending areas 20a It can be connected by the non-bending area 20b to realize multiple folding of the folding display device.
  • the folding display device may further include a back frame assembly 10 and a front frame assembly 40 .
  • the back frame assembly 10 is disposed below the support plate 20 for supporting the support plate 20 , the display panel 30 and other components in the foldable display device.
  • a cavity is opened on the side of the back frame assembly 10 facing the support plate 20 , and the support plate 20 , the display panel 30 and other components in the folding display device can be arranged in the back frame assembly 10 inside the chamber.
  • the cavity forms a wrapping and supporting function for the support plate 20 , the display panel 30 and other components in the folding display device, so as to prevent external forces from damaging each component in the folding display device.
  • the back frame assembly 10 includes a folding shaft 101 and a back plate 102 , the back plate 102 is connected to both ends of the folding shaft 101 , and the folding shaft 101 is arranged corresponding to the bending area 20 a of the support plate 20 . , the back plate 102 can be rotated around the folding shaft 101 to achieve the effect of folding or unfolding of the folding display device.
  • the folding shaft 101 can be arranged at the middle position of the back frame assembly 10 in the length direction, so as to realize the symmetrical folding of the folding display device; the folding shaft 101 can also be arranged at the back frame assembly 10 near one side edge, and the back plate 102 is connected to opposite ends of the folding shaft 101 to realize asymmetrical folding of the folding display device; the back frame assembly 10 may also include a plurality of The folding shafts 101 and a plurality of the folding shafts 101 can be connected by the back plate 102 to realize multiple folding of the folding display device.
  • the back frame assembly 10 is provided with a accommodating bin near the folding shaft 101.
  • the accommodating bin provided on the back frame assembly 10 is used for accommodating the arc-shaped protruding structure, so as to prevent the back frame assembly 10 from interfering with the support plate 20 and the display panel 30 . cause a squeeze.
  • the front frame assembly 40 is disposed above the display panel 30 for fixing the display panel 30 , the support plate 20 and the back frame assembly 10 together.
  • the front frame assembly 40 includes a first frame body 401 and a second frame body 402, the first frame body 401 and the second frame body 402 are rotatably connected, and the first frame body 402
  • the connection between 401 and the second frame 402 corresponds to the bending area 20a; optionally, the connection between the first frame 401 and the second frame 402
  • the middle position in the length direction so as to realize the symmetrical folding of the folding display device; position to achieve asymmetrical folding of the folding display device.
  • the front frame assembly 40 may further include a plurality of frame bodies, and every two adjacent frame bodies are rotatably connected, so as to realize multiple folding of the folding display device.
  • FIG. 2 is a schematic structural diagram of a support plate provided by an embodiment of the present application
  • FIG. 3 is a partial enlarged view of a bending area of the support plate provided by an embodiment of the present application
  • the support plate 20 includes the bending area 20a and the non-bending area 20b connected to opposite ends of the bending area 20a.
  • the bending area 20a has an extensible hollow structure, and the hollow structure keeps the bending area 20a extensible and bendable; during the bending process of the folding display device, the The bending area 20a bends together with the flexible display area of the display panel 30 to support the flexible display area of the display panel 30; at the same time, the bending area 20a generates a certain extension during the bending process, reducing the Or eliminate the pressing of the display panel 30 by the support plate 20 and the risk of delamination between the display panel 30 and the support plate 20 caused by the pressing. It should be understood that, compared with the non-bending region 20b, the bending region 20a with the hollow structure has less material content per unit volume, which is favorable for maintaining higher ductility and flexibility.
  • the bending area 20a and the non-bending area 20b are an integrated structure, and the bending area 20a and the non-bending area 20b form a complete plane supporting the display panel 30 .
  • the above-mentioned structural features can avoid the step difference caused by the use of metal thin plates and two-segment support plates in the prior art, which is beneficial to improve the display flatness of the display panel 30 and prevent the occurrence of intermediate creases.
  • the hollow structure of the bending area 20a includes a solid part 201 and a hollow part 202, and the solid part 201 is connected with the non-bending area 20b, so that the The bending area 20a and the non-bending area 20b are connected as a whole.
  • the solid portion 201 includes more strip-shaped entities 201 a, and the strip-shaped entities 201 a are interwoven and connected to form a network structure;
  • the hollow portion 202 penetrates the support plate 20 along the thickness direction of the support plate 20 .
  • the strip-shaped entities 201a of the solid portion 201 may be arranged in a straight line and interwoven and connected to each other, thereby forming a regular grid-like structure.
  • the strip-shaped body 201a of the solid portion 201 is curved. It should be noted that when the strip-shaped body 201a of the solid portion 201 is curved, the solid portion 201 has a relatively large extensibility and deformability, so that the bending region 20a exhibits more excellent ductility .
  • the hollow portion 202 includes a plurality of first repeating units 202a, and the first repeating units 202a have arc-shaped edges.
  • the strip-shaped entities 201a of the solid portion 201 also have arc-shaped edges; the strip-shaped entities 201a of the arc-shaped edge structure also have arc-shaped edges during the bending process. It can effectively disperse stress, prevent excessive stress concentration, and reduce the risk of cracking due to stress concentration.
  • the first repeating unit 202a includes a first arc-shaped edge R1 and a second arc-shaped edge R2, and the second arc-shaped edge R2 is connected to one of the two adjacent first arc-shaped edges R1. and the bending direction of the first arc-shaped edge R1 is away from the solid portion 201 , and the bending direction of the second arc-shaped edge R2 is toward the solid portion 201 .
  • the above-mentioned structural features of the first repeating unit 202a enable the strip-shaped body 201a of the solid portion 201 to form a wavy edge, which further improves the ability of the strip-shaped body 201a to disperse stress during bending.
  • the first repeating unit 202a includes three first arc-shaped edges R1 and three second arc-shaped edges R2 connecting the first arc-shaped edges R1, and the first arc-shaped edges R1
  • the bending direction of the arc-shaped edge R1 is away from the solid part 201
  • the bending direction of the second arc-shaped edge R2 is toward the solid part 201
  • the first arc-shaped edge R1 forms the third part of the first repeating unit 202 a.
  • the second arc-shaped edge R2 forms three sides of the first repeating unit 202a, so that the first repeating unit has a multi-curved triangular hollow structure.
  • the solid portion 201 presents a multi-arc cross-linked structure, which further improves the stress dispersing ability during the bending process, so that the bending
  • the folded region 20a has excellent ductility and flexibility.
  • the radius of the arc of the first arc-shaped edge R1 is 1-2 mm
  • the radius of the arc of the second arc-shaped edge R2 is 2-4 mm.
  • the first repeating unit 202a is a center-symmetric structure, and the center of symmetry of the six adjacent first repeating units 202a distributed around the same first repeating unit 202a on the same central circle D. It should be understood that the above-mentioned structural features of the first repeating unit 202a can ensure that the stress distribution in each region of the bending region 20a is uniform during the bending process, and the extension deformation of each region is balanced, which is conducive to maintaining the support.
  • the plate 20 and the display panel 30 are flatly adhered, when the expansion and contraction of the bending area 20a is greater than 20%, the support plate 20 will not be cracked or the folded display device will not be delaminated.
  • the display panel 30 is an organic light emitting diode display panel.
  • the base substrate 301 may include an insulating material, and at least in the flexible display area is made of a flexible substrate material, such as polyimide, etc.
  • the non-flexible display area can also be made of materials such as glass, quartz, ceramics or plastics;
  • the buffer layer 302 is arranged on the base substrate 301, and the buffer layer 302 can include various organic materials or inorganic materials;
  • the semiconductor layer 303 is arranged On the buffer layer 302, the substrate material of the semiconductor layer 303 can be N-type or P-type polysilicon semiconductor, or metal oxide semiconductor;
  • the first gate insulating layer 304 is arranged on the semiconductor layer 303, and its material It can be an insulating material including silicon nitride or silicon oxide;
  • the first gate 305 is arranged on the first gate insulating layer 304, and the material of the first gate 305 can be a metal material Mo, and the semiconductor layer 303 can be divided into a source electrode, a channel part and a drain electrode, the first gate electrode 305 and the source electrode, channel and drain electrode of the semiconductor layer 303 constitute the gate electrode, source electrode of a low temperature polysilicon transistor or metal oxide transistor.
  • the second gate insulating layer 306 is arranged on the first gate 305, and its material may be an insulating material including silicon nitride or silicon oxide; the second gate 307 is arranged on the second gate On the polar insulating layer 306, the material can be metal Mo, the second gate 307 and the first gate 305 form the upper and lower electrodes of the storage capacitor; the interlayer insulating layer 308 covers the second gate 307, The material can be insulating material including silicon nitride or silicon oxide; the source-drain electrode 309 is arranged on the interlayer insulating layer 308, and its material is gold, silver, copper, lithium, sodium, potassium, magnesium, aluminum, zinc and one or more of the combinations thereof, the source-drain electrode 309 is connected to the via hole on the interlayer insulating layer 308 , the second gate insulating layer 306 and the first gate insulating layer 304 The source and drain electrodes of the semiconductor layer 303 are electrically connected; the passivation layer 310 is arranged on the source-
  • the folding display device provided by the embodiment of the present application supports the display panel by arranging a support plate with an extensible hollow structure, which reduces the interlayer stress of the display device and reduces the occurrence of interlayer peeling or cracking of the display device compared with the prior art. risks of.
  • FIG. 6 and FIG. 7 are respectively a comparison diagram of the interlayer stress state during the bending process of the folding display device of the prior art and the folding display device of the present application.
  • the support structure of the support plate It can be seen from FIG. 6 that the relative value of the interlayer stress in the thin film encapsulation layer of the folding display device of the present application is 0.112, while the relative value of the interlayer stress in the thin film encapsulation layer of the folding display device of the prior art is 0.132.
  • the application reduces the interlayer stress of the thin film encapsulation layer by about 15%. It can be seen from FIG. 7 that the relative value of the interlayer stress in the light-emitting layer of the folding display device of the present application is 125.3, while the relative value of the interlayer stress in the light-emitting layer of the folding display device of the prior art is 156.6. Compared with the prior art, the interlayer stress of the light-emitting layer is reduced by about 20%. It should be understood that the reduction of interlayer stress in a folded display device is beneficial to reduce the risk of interlayer peeling or cracking.
  • the foldable display device provided by the embodiments of the present application includes a display panel and a support plate for supporting the display panel, and the support plate is provided with a bend corresponding to the flexible display area of the display panel A hollow structure with ductility is arranged in the bending area.

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

一种折叠显示装置，包括显示面板（30）和用于支撑显示面板（30）的支撑板（20），显示面板（30）包括柔性显示区，支撑板（20）上设置有与柔性显示区相对应的弯折区（20a），弯折区（20a）中设置有可延展的镂空结构；通过设置镂空结构，提升了弯折区（20a）的变形能力和延展能力，降低了显示装置层间剥离或开裂的风险。

Description

折叠显示装置 技术领域
本申请涉及显示技术领域，尤其涉及一种折叠显示装置。
 背景技术
随着显示装置制造技术的发展，用户对显示装置多样性的追求也越来越强烈，其中可折叠显示装置以其十足的科技感和时尚性，并且兼具便利性的特点，而深受用户和制造厂商的广泛青睐。在手机领域，折叠手机相较于传统手机表现出诸多优势，例如：实现了屏幕的可扩展性，具有更加轻薄的体积，降低了功耗，提升了设备的续航能力等。
有机发光二极管（Organic Light Emitting Diode, OLED）显示面板应用于折叠显示装置已经成为行业共识，这正是利用了OLED显示面板的柔性可弯曲的特点。现有技术的折叠显示装置普遍采用两层支撑结构支持柔性显示面板，其中靠近柔性显示面板的一层为金属薄板，位于金属薄板下面的一层为两段状的支撑板。支撑板本身不可弯折，而是通过其两段之间的空隙实现弯折性。这种结构的折叠显示装置存在以下问题：与柔性显示面板贴合的金属薄板本身的延展性较差，在随柔性显示面板弯折时，会对柔性显示面板造成挤压，进而增大显示装置的层间剥离风险；此外，两段状的支撑板在中间弯折区存在段差，造成显示装置的平整性和屏幕的平整性均较差；同时金属薄板加支撑板的支撑结构也会导致折叠显示装置的整体厚度较大，不利于实现显示装置的轻薄化设计。
 技术问题
现有技术的折叠显示装置采用两层支撑结构支持柔性显示面板，其一层为金属薄板，另一层为两段状的支撑板；该支撑结构存在：金属薄板延展性差造成柔性显示面板受到挤压的问题，以及两段状的支撑板的中间弯折区存在段差，造成显示装置的平整性和屏幕的平整性均较差的问题，且该支撑结构厚度较大，不符合显示装置的轻薄化发展方向。
 技术解决方案
基于上述现有技术中存在的不足，本申请提供一种折叠显示装置，通过设置具有可延展镂空结构的支撑板支持显示面板，解决了现有技术中的支撑结构厚度大、平整性差及容易挤压显示面板的问题。
本申请提供一种折叠显示装置，包括：
显示面板，至少包括一柔性显示区；以及
支撑板，设置于所述显示面板的下方，用于支撑所述显示面板，所述支撑板包括与所述柔性显示区对应设置的弯折区，所述弯折区具有可延展的镂空结构。
在本申请的折叠显示装置中，所述支撑板还包括非弯折区，所述镂空结构包括实体部和镂空部，所述实体部与所述非弯折区连接。
在本申请的折叠显示装置中，所述实体部为网络状结构，所述实体部围成的空隙构成所述镂空部。
在本申请的折叠显示装置中，所述实体部包含多个相互交织并连接的条状实体，所述条状实体的形状为弯曲状。
在本申请的折叠显示装置中，所述镂空部包括多个第一重复单元，所述第一重复单元具有弧形边缘。
在本申请的折叠显示装置中，所述第一重复单元包括第一弧形边缘和连接相邻两个所述第一弧形边缘的第二弧形边缘。
在本申请的折叠显示装置中，所述第一重复单元包括三个所述第一弧形边缘和连接所述第一弧形边缘的三个所述第二弧形边缘，所述第一弧形边缘形成所述第一重复单元的三个端部，所述第二弧形边缘形成所述第一重复单元的三个侧边。
在本申请的折叠显示装置中，所述支撑板在完全展开状态下，所述第一重复单元为中心对称结构。
在本申请的折叠显示装置中，围绕同一个所述第一重复单元的相邻六个所述第一重复单元的对称中心位于同一个圆上。
在本申请的折叠显示装置中，所述柔性显示区位于所述显示面板的长度方向的中间位置；所述弯折区位于所述支撑板的长度方向的中间位置。
在本申请的折叠显示装置中，所述柔性显示区位于所述显示面板的靠近一侧边缘的位置；所述弯折区位于所述支撑板的靠近一侧边缘的位置。
在本申请的折叠显示装置中，所述显示面板包括多个所述柔性显示区，所述支撑板包括多个与所述柔性显示区对应设置的所述弯折区。
在本申请的折叠显示装置中，多个所述弯折区之间通过非弯折区连接。
在本申请的折叠显示装置中，所述镂空部沿所述支撑板的厚度方向贯穿所述支撑板。
在本申请的折叠显示装置中，所述支撑板与所述显示面板之间通过柔性胶体进行粘接，且至少在与所述显示面板的柔性显示区相对应的位置，所述柔性胶体具有可弯折性。
在本申请的折叠显示装置中，所述折叠显示装置还包括：
背框组件，设置于所述支撑板下方，所述背框组件包括折叠轴和连接于所述折叠轴两侧的背板，所述折叠轴对应所述弯折区设置；以及
前框组件，设置于所述显示面板上方，所述前框组件包括第一框体和第二框体，所述第一框体与所述第二框体为可转动连接，且所述第一框体与所述第二框体的连接处对应所述弯折区。
在本申请的折叠显示装置中，所述折叠轴设置于所述背框组件的长度方向的中间位置；或者所述折叠轴设置于所述背框组件的靠近一侧边缘的位置。
在本申请的折叠显示装置中，所述背框组件包括多个所述折叠轴，多个所述折叠轴之间通过所述背板连接。
在本申请的折叠显示装置中，所述第一框体与所述第二框体的连接处位于所述前框组件的长度方向的中间位置；或者所述第一框体与所述第二框体的连接处位于所述前框组件的靠近一侧边缘的位置。
本申请还提供一种折叠显示装置，其包括：
背框组件，其包括折叠轴和连接于所述折叠轴两侧的背板；
支撑板，设置于所述背框组件上，其包括与所述折叠轴对应设置的弯折区，所述弯折区具有可延展的镂空结构；
显示面板，设置于所述支撑板上，其至少包括一柔性显示区，所述折叠轴和所述弯折区均与所述柔性显示区对应设置；以及
前框组件，设置于所述显示面板上方，其包括第一框体和第二框体，所述第一框体与所述第二框体为可转动连接，且所述第一框体与所述第二框体的连接处对应所述弯折区；
所述镂空结构包括实体部和镂空部，所述实体部与所述支撑板的非弯折区连接，所述实体部包含多个相互交织并连接的条状实体，所述实体部围成的空隙构成所述镂空部。
 有益效果
申请提供的折叠显示装置包括显示面板和用于支撑所述显示面板的支撑板，所述支撑板上设置有与所述显示面板的柔性显示区相对应的弯折区，通过在所述弯折区中设置具有可延展性的镂空结构，提升了所述弯折区的变形能力和延展能力，相较于现有技术，减小了折叠显示装置在弯折和展平过程中，显示面板所承受的挤压作用力，降低了层间剥离或开裂的风险；同时一体化的所述支撑板提高了显示面板的平整性，减小了显示装置的整体厚度。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例提供的折叠显示装置的结构爆炸图；
图2是本申请实施例提供的支撑板的结构示意图；
图3是本申请实施例提供的支撑板弯折区的局部放大图；
图4是本申请实施例提供的支撑板的镂空结构的局部放大图；
图5是本申请实施例提供的显示面板的截面结构示意图；
图6是现有技术的折叠显示装置和本申请的折叠显示装置在弯折过程中薄膜封装层的层间应力对比图；
图7是现有技术的折叠显示装置和本申请的折叠显示装置在弯折过程中发光层的层间应力对比图。
 本发明的实施方式
以下各实施例的说明是参考附加的图示，用以例示本申请可用以实施的特定实施例。本申请所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本申请，而非用以限制本申请。在图中，结构相似的单元是用以相同标号表示。
本申请实施例提供一种折叠显示装置，所述折叠显示装置包括显示面板和用于支撑所述显示面板的支撑板，所述支撑板上设置有与所述显示面板的柔性显示区相对应的弯折区，通过在所述弯折区中设置具有可延展性的镂空结构，提升所述弯折区的变形能力和延展能力，相较于现有技术，减小了折叠显示装置在弯折和展平过程中，显示面板所承受的挤压作用力，降低了层间剥离的风险；同时提高了显示面板的平整性，减小了显示装置的整体厚度。
图1是本申请实施例提供的折叠显示装置的结构爆炸图。所述折叠显示装置包括显示面板30，以及设置于所述显示面板30下方的支撑板20。所述显示面板30可以是有机发光二极管显示面板；所述显示面板30上至少包括一个柔性显示区，在所述折叠显示装置的弯折过程中，所述显示面板30沿所述柔性显示区进行弯曲。可选地，所述柔性显示区可以位于所述显示面板30的长度方向的中间位置，以实现所述折叠显示装置的对称折叠；所述柔性显示区也可以位于所述显示面板30的靠近一侧边缘的位置，以实现所述折叠显示装置的非对称折叠；所述显示面板还可以包括多个所述柔性显示区，以实现所述折叠显示装置的多重折叠。
所述支撑板20设置于所述显示面板30的下侧，起到支持所述显示面板30的作用。所述支撑板20与所述显示面板30之间可以通过柔性胶体进行粘接，且至少在与所述显示面板30的柔性显示区相对应的位置，所述柔性胶体具有可弯折性。
所述支撑板20包括弯折区20a和非弯折区20b，所述弯折区20a与所述显示面板30的柔性显示区对应设置。在所述折叠显示装置的弯折过程中，所述支撑板20沿所述弯折区20a进行弯曲。可选地，所述弯折区20a可以位于所述支撑板20的长度方向的中间位置，且所述非弯折区20b连接于所述弯折区20a的相对两端，随着所述弯折区20a的弯曲可以实现所述折叠显示装置的对称折叠；所述弯折区20a也可以位于所述支撑板20的靠近一侧边缘的位置，且所述非弯折区20b连接于所述弯折区20a的相对两端或一端，以实现所述折叠显示装置的非对称折叠；所述支撑板20还可以包括多个所述弯折区20a，多个所述弯折区20a之间可以通过所述非弯折区20b连接，以实现所述折叠显示装置的多重折叠。
可选地，所述折叠显示装置还可以包括背框组件10和前框组件40。所述背框组件10设置于所述支撑板20的下方，用于支撑所述支撑板20、所述显示面板30以及所述折叠显示装置中的其它组件。所述背框组件10的朝向所述支撑板20的一侧开设有腔室，所述支撑板20、所述显示面板30以及所述折叠显示装置中的其它组件可以设置于所述背框组件10的腔室内。所述腔室形成对所述支撑板20、所述显示面板30以及所述折叠显示装置中的其它组件的包裹和支撑作用，防止外力损伤所述折叠显示装置中的各个组件。
所述背框组件10包括折叠轴101和背板102，所述背板102连接于所述折叠轴101的两端，且所述折叠轴101与所述支撑板20的弯折区20a对应设置，所述背板102可绕所述折叠轴101转动，从而实现所述折叠显示装置的折叠或展开的效果。可选地，所述折叠轴101可以设置于所述背框组件10的长度方向的中间位置，从而实现所述折叠显示装置的对称折叠；所述折叠轴101也可以设置于所述背框组件10的靠近一侧边缘的位置，且所述背板102连接于所述折叠轴101的相对两端，以实现所述折叠显示装置的非对称折叠；所述背框组件10还可以包括多个所述折叠轴101，多个所述折叠轴101之间可以通过所述背板102连接，以实现所述折叠显示装置的多重折叠。可选地，所述背框组件10在所述折叠轴101附近设置有容纳仓，应当理解的是，所述显示面板30和所述支撑板20在弯曲状态下，其弯折区会形成一弧形突出结构，而设置于所述背框组件10上的所述容纳仓正是用于容纳该弧形突出结构，从而防止出现背框组件10对所述支撑板20和所述显示面板30造成挤压的状况。
所述前框组件40设置于所述显示面板30的上方，用于将所述显示面板30、所述支撑板20和所述背框组件10固定在一起。可选地，所述前框组件40包括第一框体401和第二框体402，所述第一框体401与所述第二框体402为可转动连接，且所述第一框体401与所述第二框体402的连接处对应所述弯折区20a；可选地，所述第一框体401与所述第二框体402的连接处位于所述前框组件40的长度方向的中间位置，从而实现所述折叠显示装置的对称折叠；所述第一框体401与所述第二框体402的连接处也可以位于所述前框组件40的靠近一侧边缘的位置，以实现所述折叠显示装置的非对称折叠。可选地，所述前框组件40还可以包括多个框体，且每相邻两个所述框体之间均为可转动连接，从而实现所述折叠显示装置的多重折叠。
如图2至图4所示，其中，图2是本申请一实施例提供的支撑板的结构示意图，图3是本申请实施例提供的支撑板弯折区的局部放大图，图4是本申请实施例提供的支撑板的镂空结构的局部放大图。所述支撑板20包括所述弯折区20a和连接于所述弯折区20a相对两端的非弯折区20b。可选地，所述弯折区20a具有可延展的镂空结构，所述镂空结构使所述弯折区20a保持延展性和可弯曲性；在所述折叠显示装置的弯折过程中，所述弯折区20a随所述显示面板30的柔性显示区一起弯曲，起到支持所述显示面板30的柔性显示区的作用；同时所述弯折区20a在弯曲过程中产生一定的延展，减小或消除了所述支撑板20对所述显示面板30的挤压和因挤压而导致的显示面板30和支撑板20层间剥离的风险。应当理解的是，具有镂空结构的所述弯折区20a相较于所述非弯折区20b，其单位体积内的材料含量较少，有利于其保持较高的延展性和柔韧性。
进一步地，所述弯折区20a和所述非弯折区20b为一体化结构，且所述弯折区20a和所述非弯折区20b形成支撑所述显示面板30的完整平面。上述结构特征可避免现有技术中采用金属薄板加两段状支撑板而出现的段差，有利于提升所述显示面板30的显示平整性，防止出现中间折痕。
可选地，如图2和图3所示，所述弯折区20a的镂空结构包括实体部201和镂空部202，所述实体部201与所述非弯折区20b连接，从而使所述弯折区20a和所述非弯折区20b连接成一整体。
可选地，所述实体部201包含较多的条状实体201a，且所述条状实体201a相互交织并连接成网络状结构；所述实体部201围成的空隙构成所述镂空部202。可选地，所述镂空部202沿所述支撑板20的厚度方向贯穿所述支撑板20。在一些实施例中，所述实体部201的条状实体201a可以沿直线布置并相互交织连接，从而形成规整的网格状结构。在另外一些实施例中，所述实体部201的条状实体201a为弯曲状。需要说明的是，当所述实体部201的条状实体201a为弯曲状时，所述实体部201具有较大的可延伸变形能力，从而使所述弯折区20a表现出更加优异的延展性。
可选地，如图3和图4所示，所述镂空部202包括多个第一重复单元202a，且所述第一重复单元202a具有弧形边缘。需要说明的是，当所述第一重复单元202a具有弧形边缘时，所述实体部201的条状实体201a同样具有弧形边缘；弧形边缘结构的所述条状实体201a在弯曲过程中可以有效分散应力，防止出现过度的应力集中，减小了因应力集中而导致开裂的风险。
进一步可选地，所述第一重复单元202a包括第一弧形边缘R1和第二弧形边缘R2，所述第二弧形边缘R2连接于相邻两个所述第一弧形边缘R1之间，且所述第一弧形边缘R1的弯曲方向背离所述实体部201，所述第二弧形边缘R2的弯曲方向朝向所述实体部201。所述第一重复单元202a的上述结构特征使所述实体部201的条状实体201a形成波浪状边缘，进一步提升所述条状实体201a在弯曲过程中分散应力的能力。
进一步可选地，所述第一重复单元202a包括三个所述第一弧形边缘R1和连接所述第一弧形边缘R1的三个所述第二弧形边缘R2，且所述第一弧形边缘R1的弯曲方向背离所述实体部201，所述第二弧形边缘R2的弯曲方向朝向所述实体部201，所述第一弧形边缘R1形成所述第一重复单元202a的三个端部，所述第二弧形边缘R2形成所述第一重复单元202a的三个侧边，从而使所述第一重复单元具有多曲面三角镂空结构。需要说明的是，在所述第一重复单元202a具有上述结构特征的条件下，所述实体部201呈现出多重弧形交联结构，进一步提升其弯曲过程中的应力分散能力，使所述弯折区20a具有优异的延展性和柔韧性。
可选地，所述第一弧形边缘R1的圆弧半径为1-2毫米，所述第二弧形边缘R2的圆弧半径为2-4毫米。所述支撑板20在完全展开状态下，所述第一重复单元202a为中心对称结构，且围绕同一个所述第一重复单元202a分布的相邻六个所述第一重复单元202a的对称中心位于同一个中心圆D上。应当理解的是，所述第一重复单元202a的上述结构特征可以保证所述弯折区20a在弯曲过程中各区域的应力分布均匀，且各区域的延伸变形量均衡，有利于保持所述支撑板20与所述显示面板30的平整贴合，在所述弯折区20a的伸缩量大于20%时不会发生支撑板20开裂失效或所述折叠显示装置的层间剥离失效。
可选地，所述显示面板30为有机发光二极管显示面板。在如图5所示的显示面板30的截面结构示意图中，衬底基板301可包括绝缘材料，且至少在所述柔性显示区由柔性衬底材料制作，例如可以是聚酰亚胺等，在非柔性显示区还可以由玻璃、石英、陶瓷或者塑料等材料制作；缓冲层302设置于所述衬底基板301上，所述缓冲层302可以包括多种有机材料或无机材料；半导体层303布置在所述缓冲层302上，所述半导体层303的衬底材料可以为N型或者P型多晶硅半导体，或金属氧化半导体；第一栅绝缘层304布置在所述半导体层303之上，其材质可以为包括氮化硅或者氧化硅等绝缘材料；第一栅极305布置在所述第一栅极绝缘层304上，所述第一栅极305的材料可以为金属材料Mo，所述半导体层303可以划分为源极、沟道部分和漏极，所述第一栅极305与所述半导体层303的源极、沟道及漏极构成低温多晶硅晶体管或金属氧化物晶体管的栅极、源极、漏极；第二栅极绝缘层306布置在所述第一栅极305上，其材质可以为包括氮化硅或者氧化硅等绝缘材料；第二栅极307布置在所述第二栅极绝缘层306上，材料可以为金属Mo，所述第二栅极307与所述第一栅极305构成存储电容的上下电极；层间绝缘层308覆盖在所述第二栅极307上，其材质可以为包括氮化硅或者氧化硅等绝缘材料；源漏电极309布置在所述层间绝缘层308上，其材料采用金、银、铜、锂、钠、钾、镁、铝、锌及其组合中的一种或多种，所述源漏电极309通过所述层间绝缘层308、所述第二栅极绝缘层306和所述第一栅极绝缘层304上的过孔与所述半导体层303的源极和漏极电性连接；钝化层310布置在所述源漏电极309上，其材质可以为包括氮化硅或者氧化硅等绝缘材料；阳极311布置在所述钝化层310上，其材质为ITO与Ag的组合，所述阳极311通过所述钝化层310的开孔与所述源漏电极309电性连接；像素定义层312布置在所述阳极311上，所述像素定义层311上设置有多个开孔，且所述开孔形状与所述显示面板30的子像素的图案一致；有机发光层313通过所述像素定义层312的开孔与所述阳极311接触；公共阴极314设置于所述像素定义层312上，且通过所述像素定义层312上的开孔与所述有机发光层313接触；薄膜封装层315设置在所述公共阴极314上方，其材质包括有机材料与无机材料的组合；触控功能层316设置在所述薄膜封装层315上方，用于实现所述显示面板30的触控功能；偏光层317设置在所述触控功能层316上方；最外层为盖板层318，起到保护显示面板30的内部元件免受外力损伤的作用。
本申请实施例提供的折叠显示装置通过设置具有可延展镂空结构的支撑板支持显示面板，相较于现有技术，减小了显示装置的层间应力，降低了显示装置出现层间剥离或开裂的风险。图6和图7分别是现有技术的折叠显示装置和本申请的折叠显示装置在弯折过程中的层间应力状态对比图，其中，现有技术的折叠显示装置采用金属薄板加两段状支撑板的支撑结构。从图6可以看出，本申请的折叠显示装置的薄膜封装层中的层间应力相对值为0.112，而现有技术的折叠显示装置的薄膜封装层中的层间应力相对值为0.132，本申请相对于现有技术，其薄膜封装层的层间应力降低了约15%。从图7可以看出，本申请的折叠显示装置的发光层中的层间应力相对值为125.3，而现有技术的折叠显示装置的发光层中的层间应力相对值为156.6，本申请相对于现有技术，其发光层的层间应力降低了约20%。应当理解的是，折叠显示装置中层间应力的降低有利于减小发生层间剥离或开裂的风险。
综上所述，本申请实施例提供的折叠显示装置包括显示面板和用于支撑所述显示面板的支撑板，所述支撑板上设置有与所述显示面板的柔性显示区相对应的弯折区，所述弯折区中设置具有可延展性的镂空结构，通过设置所述镂空结构，提升了所述弯折区的变形能力和延展能力，相较于现有技术，减小了折叠显示装置在弯折和展平过程中，显示面板所承受的挤压作用力，降低了层间剥离或开裂的风险；同时一体化的所述支撑板提高了显示面板的平整性，减小了显示装置的整体厚度。
需要说明的是，虽然本申请以具体实施例揭露如上，但上述实施例并非用以限制本申请，本领域的普通技术人员，在不脱离本申请的精神和范围内，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 (20)

  1. 一种折叠显示装置，其包括：
    显示面板，至少包括一柔性显示区；以及
    支撑板，设置于所述显示面板的下方，用于支撑所述显示面板，所述支撑板包括与所述柔性显示区对应设置的弯折区，所述弯折区具有可延展的镂空结构。
  2. 根据权利要求1所述的折叠显示装置，其中，所述支撑板还包括非弯折区，所述镂空结构包括实体部和镂空部，所述实体部与所述非弯折区连接。
  3. 根据权利要求2所述的折叠显示装置，其中，所述实体部为网络状结构，所述实体部围成的空隙构成所述镂空部。
  4. 根据权利要求3所述的折叠显示装置，其中，所述实体部包含多个相互交织并连接的条状实体，所述条状实体的形状为弯曲状。
  5. 根据权利要求4所述的折叠显示装置，其中，所述镂空部包括多个第一重复单元，所述第一重复单元具有弧形边缘。
  6. 根据权利要求5所述的折叠显示装置，其中，所述第一重复单元包括第一弧形边缘和连接相邻两个所述第一弧形边缘的第二弧形边缘。
  7. 根据权利要求6所述的折叠显示装置，其中，所述第一重复单元包括三个所述第一弧形边缘和连接所述第一弧形边缘的三个所述第二弧形边缘，所述第一弧形边缘形成所述第一重复单元的三个端部，所述第二弧形边缘形成所述第一重复单元的三个侧边。
  8. 根据权利要求5所述的折叠显示装置，其中，所述支撑板在完全展开状态下，所述第一重复单元为中心对称结构。
  9. 根据权利要求8所述的折叠显示装置，其中，围绕同一个所述第一重复单元的相邻六个所述第一重复单元的对称中心位于同一个圆上。
  10. 根据权利要求1所述的折叠显示装置，其中，所述柔性显示区位于所述显示面板的长度方向的中间位置；所述弯折区位于所述支撑板的长度方向的中间位置。
  11. 根据权利要求1所述的折叠显示装置，其中，所述柔性显示区位于所述显示面板的靠近一侧边缘的位置；所述弯折区位于所述支撑板的靠近一侧边缘的位置。
  12. 根据权利要求1所述的折叠显示装置，其中，所述显示面板包括多个所述柔性显示区，所述支撑板包括多个与所述柔性显示区对应设置的所述弯折区。
  13. 根据权利要求12所述的折叠显示装置，其中，多个所述弯折区之间通过非弯折区连接。
  14. 根据权利要求2所述的折叠显示装置，其中，所述镂空部沿所述支撑板的厚度方向贯穿所述支撑板。
  15. 根据权利要求1所述的折叠显示装置，其中，所述支撑板与所述显示面板之间通过柔性胶体进行粘接，且至少在与所述显示面板的柔性显示区相对应的位置，所述柔性胶体具有可弯折性。
  16. 根据权利要求1所述的折叠显示装置，其还包括：
    背框组件，设置于所述支撑板下方，所述背框组件包括折叠轴和连接于所述折叠轴两侧的背板，所述折叠轴对应所述弯折区设置；以及
    前框组件，设置于所述显示面板上方，所述前框组件包括第一框体和第二框体，所述第一框体与所述第二框体为可转动连接，且所述第一框体与所述第二框体的连接处对应所述弯折区。
  17. 根据权利要求16所述的折叠显示装置，其中，所述折叠轴设置于所述背框组件的长度方向的中间位置；或者所述折叠轴设置于所述背框组件的靠近一侧边缘的位置。
  18. 根据权利要求16所述的折叠显示装置，其中，所述背框组件包括多个所述折叠轴，多个所述折叠轴之间通过所述背板连接。
  19. 根据权利要求16所述的折叠显示装置，其中，所述第一框体与所述第二框体的连接处位于所述前框组件的长度方向的中间位置；或者所述第一框体与所述第二框体的连接处位于所述前框组件的靠近一侧边缘的位置。
  20. 一种折叠显示装置，其包括：
    背框组件，其包括折叠轴和连接于所述折叠轴两侧的背板；
    支撑板，设置于所述背框组件上，其包括与所述折叠轴对应设置的弯折区，所述弯折区具有可延展的镂空结构；
    显示面板，设置于所述支撑板上，其至少包括一柔性显示区，所述折叠轴和所述弯折区均与所述柔性显示区对应设置；以及
    前框组件，设置于所述显示面板上方，其包括第一框体和第二框体，所述第一框体与所述第二框体为可转动连接，且所述第一框体与所述第二框体的连接处对应所述弯折区；
    所述镂空结构包括实体部和镂空部，所述实体部与所述支撑板的非弯折区连接，所述实体部包含多个相互交织并连接的条状实体，所述实体部围成的空隙构成所述镂空部。
PCT/CN2020/113798 2020-08-27 2020-09-07 折叠显示装置 Ceased WO2022041313A1 (zh)

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