WO2023035405A1 - 显示装置 - Google Patents

显示装置 Download PDF

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Publication number
WO2023035405A1
WO2023035405A1 PCT/CN2021/130717 CN2021130717W WO2023035405A1 WO 2023035405 A1 WO2023035405 A1 WO 2023035405A1 CN 2021130717 W CN2021130717 W CN 2021130717W WO 2023035405 A1 WO2023035405 A1 WO 2023035405A1
Authority
WO
WIPO (PCT)
Prior art keywords
display device
folding frame
support plate
pretensioning
hole
Prior art date
Application number
PCT/CN2021/130717
Other languages
English (en)
French (fr)
Inventor
汪文强
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 US17/615,158 priority Critical patent/US12058280B2/en
Publication of WO2023035405A1 publication Critical patent/WO2023035405A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
    • H04M1/0268—Details of the structure or mounting of specific components for a display module assembly including a flexible display panel
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
    • H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
    • H04M1/0214—Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • H04M1/0216—Foldable in one direction, i.e. using a one degree of freedom hinge

Definitions

  • the present application relates to the field of display technology, in particular to a display device with a pretension assembly.
  • Organic Light Emitting Diode organic Light emitting diode (OLED) display technology is becoming more and more mature, which has greatly promoted the commercial market of folding mobile phones and folding notebook computers. Folding display products are favored by consumers. However, the crease problem has always been one of the main reasons affecting the further expansion of the folding mobile phone market. At present, no reasonable solution has been found for how to effectively reduce the crease of OLED screens on mobile phones.
  • the factors causing creases on OLED display screens are complex, mainly including the following reasons. Due to the unreasonable design of the folding display device, such as the hinge of the folding mobile phone, the screen cannot naturally complete the folding and unfolding actions during the use of the mobile phone. In addition, there are pulling and squeezing behaviors on the motion track between the middle frame structure and the screen of the folding mobile phone. When the number of bending times reaches a certain number, the microscopic damage between the stacked materials of the OLED module will accumulate to a certain extent, so Evolves into creases visible to the naked eye.
  • the technical problem of the existing folding display device is that, when the bending area of the existing folding display device is bent many times, non-recoverable plastic deformation will occur, thus forming creases.
  • an object of the present application is to provide a display device, which reduces the chance of forming creases after the flexible display screen is bent multiple times, improves the flatness of the bending area of the screen, and thereby improves the flexibility of the flexible display screen. Overall experience.
  • the present application provides a display device, which includes a first folding frame, a second folding frame, a first support plate, at least one second support plate, at least one pretensioning assembly and a flexible display screen.
  • the second folding frame rotates relative to the first folding frame.
  • the first supporting plate is arranged on the first folding frame and the second folding frame, and includes a bending structure.
  • the bending structure connects the first folding frame and the second folding frame.
  • At least one second support board is disposed at least on one side of the first support board.
  • At least one pretensioning assembly is connected with the second support plate.
  • the flexible display screen is arranged on the first support plate and at least one second support plate, and is connected with the second support plate.
  • At least one pre-tightening component is used for providing pre-tightening force to the flexible display screen.
  • At least one pretensioning assembly is arranged between the first folding frame and at least one second support plate and/or the second folding frame and at least one second support plate between.
  • At least one pretensioning component includes at least one elastic element, and at least one elastic element generates a pretensioning force.
  • At least one elastic element is connected to at least one second support plate through at least one connecting element, and at least one connecting element passes through at least one first through hole.
  • the flexible display screen includes an outer cover window and a plurality of functional layers, and the outer cover window covers the top surface and one side surface of the plurality of functional layers and the bottom of at least one second support plate On the surface, the window of the outer cover is connected with at least one pretensioning component.
  • At least one second through hole is defined on the outer cover window, at least one second through hole communicates with at least one first through hole, and at least one connecting element passes through at least one first through hole. hole and at least one second through hole.
  • At least one connecting element is a pin
  • at least one elastic element is a spring
  • at least one first through hole has a first part and a second part, and the width of the first part is smaller than that of the at least one connecting element.
  • the width of the second portion is greater than the top of the at least one connecting element.
  • the shape of at least one first through hole is two overlapping circles or triangles.
  • the second support plate includes a side wall higher than the first part.
  • the position of at least one groove corresponding to at least one first through hole is defined on at least one first folding frame or the second folding frame, and at least one pretensioning component is embedded in at least one groove.
  • the window of the outer cover includes transparent polyimide or polyethylene terephthalate.
  • the display device of the present invention further includes a pivot assembly connected to the first folding frame and the second folding frame.
  • the display device further includes a pivot assembly, the pivot assembly includes at least one hinge and a protective cover, the pivot assembly includes at least one hinge and a protective cover, and the at least one hinge is connected to the first folder
  • the frame is connected with the second folding frame, and the protective cover covers at least one hinge and part of the first folding frame and the second folding frame.
  • the display device further includes a driving module, the driving module is electrically connected to the flexible display screen, and controls the flexible display screen of the display device to display images.
  • a plurality of holes are defined on the first support plate to form a bent structure, and the first support plate and at least one second support plate include metal, elastic material, flexible material , one or more of composite materials.
  • the present application further provides a display device, including: a first folding frame; a second folding frame, which rotates relative to the first folding frame; a first support plate, which is arranged on the first folding frame and the second folding frame on the frame, and includes a bending structure, wherein, the bending structure connects the first folding frame and the second folding frame; a plurality of second supporting boards are arranged at least on both sides of the first supporting board; a plurality of preloading The component is connected with the second support board; and the flexible display screen is arranged on the first support board and a plurality of second support boards, and is connected with the second support board, wherein the plurality of pretensioning components Used to provide a preload to the flexible display.
  • the plurality of pretensioning components include elastic elements, and the elastic elements generate pretensioning force.
  • the elastic element is connected to the plurality of second supporting boards through a plurality of connecting elements, and the plurality of connecting elements penetrate through the plurality of first supporting boards defined on the plurality of second supporting boards. through hole.
  • the flexible display screen includes an outer cover window and multiple functional layers, the outer cover window covers the top surfaces of the multiple functional layers, and the outer cover window is connected with multiple pretensioning components.
  • a plurality of second through holes are defined on the window of the outer cover, the plurality of second through holes communicate with the plurality of first through holes, and the plurality of connecting elements pass through the plurality of first through holes. hole and a plurality of second through holes.
  • the plurality of connecting elements are pins
  • the elastic element is a spring
  • the plurality of first through holes have a first part and a second part
  • the width of the first part is smaller than the top of at least one connecting element
  • the width of the second part is larger than the top of at least one connecting element.
  • the display device further includes a pivot assembly, the pivot assembly includes at least one hinge and a protective cover, at least one hinge is connected to the first folding frame and the second folding frame, and the protection cover The cover covers at least one hinge and part of the first folding frame and the second folding frame.
  • the beneficial effect of the present application is to provide pre-tightening force to the flexible display screen, reduce the chance of forming creases after multiple bendings of the flexible display screen, and improve the flatness of the bending area of the screen.
  • FIG. 1 is a block diagram of a folding display device according to an embodiment of the present application.
  • FIG. 2 is a first expanded schematic diagram of a display device according to an embodiment of the present application.
  • FIG. 3 is a first folded schematic diagram of the display device according to the embodiment of the present application.
  • FIG. 4 is a schematic diagram of a first assembly of a display device according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a pretension assembly of a display device according to an embodiment of the present application.
  • FIG. 6 is a first schematic diagram of a second support plate of the display device according to the embodiment of the present application.
  • FIG. 7 is a second schematic diagram of a second support plate of the display device according to the embodiment of the present application.
  • FIG. 8 is a second assembly diagram of the display device according to the embodiment of the present application.
  • FIG. 9 is a schematic diagram of a third assembly of the display device according to the embodiment of the present application.
  • FIG. 10 is a schematic diagram of a fourth assembly of the display device according to the embodiment of the present application.
  • FIG. 11 is a schematic diagram of a fifth assembly of the display device according to the embodiment of the present application.
  • FIG. 12 is a schematic diagram of a second folding of the display device according to the embodiment of the present application.
  • FIG. 13 is a second expanded schematic view of the display device according to the embodiment of the present application.
  • FIG. 14 is a schematic diagram of a display device according to an embodiment of the present application.
  • Fig. 15 is a simulation diagram of the flexible display screen of the embodiment of the present application.
  • the display device 100 of the present application includes a first folding frame 101, a second folding frame 102, a first support plate 103, a second support plate 104, a pretensioning assembly 105, a flexible display 106 and Pivot assembly 107.
  • the second folding frame 102 rotates relative to the first folding frame 101 .
  • the second folding frame 102 and the first folding frame 101 are pivoted or hinged to each other.
  • the display device 100 of the present application further includes a pivot component 107 .
  • the pivot assembly 107 can be connected with the first folding frame 101 and the second folding frame 102, so by the setting of the first folding frame 101, the second folding frame 102 and the pivot assembly 107, as shown in Fig. 2 and As shown in FIG. 3 , the display device 100 can be folded or unfolded.
  • the pivot assembly 107 includes at least one hinge 1071 and a protective cover 1072 .
  • At least one hinge 1071 is connected with the first folding frame 101 and the second folding frame 102 .
  • the protective cover 1072 covers at least one hinge 1071 and part of the first folding frame 101 and the second folding frame 102 to protect at least one hinge 1071 and part of the first folding frame 101 and the second folding frame 102 .
  • the pivot assembly 107 may also include gears, rotating shafts, damping mechanisms, etc., which may be configured according to actual needs.
  • the first support plate 103 is disposed on the first folding frame 101 and the second folding frame 102 , and includes a bending structure 1031 .
  • the position of the bending structure 1031 corresponds to the pivotal position of the first folding frame 101 and the second folding frame 102 .
  • a plurality of holes are defined on the first support plate 103 to form a bent structure 1031 with a patterned mesh structure.
  • the first support plate 103 is mainly used to ensure the bendability, support and flatness of the flexible display 106 .
  • the first support plate 103 includes one or more of metal, elastic material, flexible material, and composite material.
  • the first support plate 103 may include stainless steel, and patterning and other processes are performed on the first support plate 103 to form the bent structure 1031 , but not limited thereto.
  • the bending structure 1031 of the first support plate 103 can be made of one or more of elastic materials, flexible materials, and composite materials, while other parts of the first support plate 103 can be made of Made of metal, such as stainless steel, to ensure the rigidity and flatness of the display device 100 .
  • At least one second support plate 104 is disposed on at least one side of the first support plate 103 , and at least one first through hole 1041 is defined on the at least one second support plate 104 .
  • the second support plate 104 is slidably disposed on one side of the first support plate 103, but not limited thereto, the second support plate 104 and the first support plate 103 can be The structures of the first folding frame 101 and the second folding frame 102 are set.
  • the second support plate 104 includes one or more of metal, elastic material, flexible material, and composite material.
  • the second support plate 104 may include stainless steel.
  • only one second support plate 104 may be disposed on one side of the first support plate 103 .
  • two second supporting boards 104 are respectively disposed on both sides of the first supporting board 103 .
  • the number and location of the second support boards 104 can be determined according to the area to be displayed, the structures of the first folding frame 101 and the second folding frame 102 and other factors.
  • the length of the flexible display screen 106 is relatively short, only one second support plate 104 may be disposed on one side of the first support plate 103 . However, if the length of the flexible display screen 106 is longer, another second support plate 104 can be added on the other side of the first support plate 103 without changing the area of the first support plate 103 .
  • At least one pretensioning component 105 is used for providing pretensioning force to the flexible display screen 106 .
  • the pretensioning assembly 105 can be disposed between the first folding frame 101 and at least one second supporting plate 104 and/or between the second folding frame 102 and at least one second supporting plate 104 .
  • at least one pretensioning component 105 can correspond to at least one first through hole 1041, and is arranged on the first folding frame 101 or the second folding frame 102 and Between at least one second supporting plate 104 .
  • FIG. 9 shows four pretensioning components 105 corresponding to four first through holes 1041
  • FIG. 11 shows two pretensioning components 105 corresponding to two first through holes 1041
  • the pretensioning assembly 105 is disposed between the first folding frame 101 and the second support plate 104 . But not limited to this.
  • the pretensioning assembly 105 can also be arranged on the second folding frame 102.
  • the second support plate 104 is arranged on the second folding frame 102, so the pretensioning assembly 105 is arranged on the second folding frame 102.
  • the pretensioning assembly 105 is arranged on the second folding frame 102.
  • the pretensioning component 105 may include at least one elastic element 1052 , and the elastic element 1052 may generate a pretensioning force.
  • at least one elastic element 1052 is connected to at least one second support plate 104 through at least one connecting element 1051 .
  • At least one connecting element 1051 passes through at least one first through hole 1041 defined on at least one second support plate 104 .
  • multiple connecting elements 1051 can be matched with one elastic element 1052; multiple connecting elements 1051 can be matched with multiple elastic elements 1052, which can be configured according to actual needs.
  • the flexible display screen 106 can be arranged on the first support plate 103 and at least one second support plate 104, and the flexible display screen 106 It is connected with at least one connection element 1051 .
  • At least one connecting element 1051 passes through at least one first through hole 1041, at least one elastic element 1052 is connected with at least one connecting element 1051, and provides at least one connecting element 1051 The pretension force toward the side of the first folding frame 101 or the second folding frame 102, for example, as shown in Fig. 13 and Fig. 14, the elastic element 1052 provides a The pretightening force on the side of the frame 101, but not limited thereto.
  • the flexible display screen 106 includes an outer cover window 1061 and a plurality of functional layers 1062, and the outer cover window 1061 covers the top surface and one side of the plurality of functional layers 1062 and at least one second The bottom surface of the supporting plate 104 .
  • the plurality of functional layers 1062 may include a cathode layer, a light emitting layer, an anode layer, and the like.
  • the flexible display screen 106 can be a flexible organic light-emitting transistor screen, and the cover window 1061 can include transparent polyimide, polyethylene terephthalate (polyethylene terephthalate) terephthalate, PET) plastics, etc.
  • the cover window 1061 is connected with at least one pretensioning component 105 .
  • at least one second through hole 1063 is defined on the outer cover window 1061 , and the at least one second through hole 1063 communicates with at least one first through hole 1041 .
  • At least one connecting element 1051 passes through at least one first through hole 1041 and at least one second through hole 1063 , and the outer cover window 1061 is connected to the elastic element 1052 through the connecting element 1051 .
  • the first through hole 1041 and the second through hole 1063 can be provided according to the number of the connection elements 1051 , which is not limited.
  • the cover window 1061 of the flexible display 106 is bent by 180°.
  • the outer cover window 1061 is applied with a pre-tightening force, and is glued and connected after being straightened. In this way, the outer cover window 1061 of the flexible display screen 106 is always subjected to a pre-tightening force relative to its multiple functional layers 1062 without affecting the stressed state of the display device layer, so that the outer surface of the flexible display screen 106 has Good flatness.
  • At least one connecting element 1051 can be a pin, and at least one elastic element 1052 can be a spring.
  • the at least one first through hole 1041 has a first portion 1042 and a second portion 1043 . As shown in Figure 6 and Figure 10, the width of the first part 1042 is smaller than the top of at least one connection element 1051, the width of the second part 1043 is greater than the top of at least one connection element 1051, because the first part 1042 is smaller than the top of the connection element 1051, When the connecting element 1051 is moved to the first part 1042, it can be fixed.
  • the connecting element 1051 When the connecting element 1051 is moved from the first part 1042 to the second part 1043, since the width of the second part 1043 is greater than the top of the connecting element 1051, it is beneficial for the connecting element 1051 to connect with the second part 1043. Disassembly of the two support plates 104.
  • the shape of the first through hole 1041 is two overlapping circles, but it is not limited thereto, as long as the shape that can facilitate the fixing of the connecting element 1051 to the first through hole 1041 should be included in this application , for example, the first through hole 1041 may also be triangular.
  • the second support plate 104 also has a side wall 1044 higher than the first portion 1042 for at least one connecting element 1051 to abut against, so as to increase the connection between the connecting element 1051 and the second
  • the contact area of the supporting plate 104 enables the connecting element 1051 to exert a more even force on the second supporting plate 104, which facilitates disassembly and maintenance, and enhances connection reliability.
  • FIG. 4 In one embodiment, as shown in FIG. 4, FIG. 6 to FIG. 8 and FIG. 10 to FIG. On the second folding frame 102. At least one pretensioning component 105 is embedded in at least one groove 1011 .
  • the number and positions of the grooves 1011 and the first through holes 1041 can be set according to the number and positions of the pretensioning components 105 or the number and positions of the connecting elements 1051 .
  • two connecting elements 1051 are respectively arranged on the first folding frame 101 and the second folding frame 102
  • four first through holes 1041 as shown in FIG. 9 are required, and four recesses are also required.
  • the slot 1011 is defined on the first folding frame 101 and the second folding frame 102 .
  • the elastic stiffness range of the elastic element 1052 can be adjusted.
  • the material of the spring can be selected, or the length of the spring can be adjusted to adjust the range of elastic stiffness, so that the flexible display 106 can maintain a good pre-tightening force during bending and unfolding. , and does not affect the stress state of the display device layer of the flexible display 106, avoiding the failure of the module due to excessive external pulling force, thereby reducing the chance of forming creases after the flexible display 106 is bent multiple times, and improving the bending of the screen
  • the flatness of the area can be improved to improve the overall user experience of the flexible display screen 106.
  • the maximum paradigm equivalent stress (Von Mises Stress) is 2.694e+02N/m2 and 1.284+e01N/m2 when expanded.
  • the flexible display screen 106 using the pre-tensioning assembly 105 is flatter than the flexible display screen 106 without using the pre-tensioning assembly 105 in part (a) of Figure 15 , so the The flatness of the flexible display screen 106 in part (b) of FIG. 15 is higher than that of the flexible display screen 106 in part (a) of FIG. 15 .
  • the driving module of the foldable display device can be electrically connected to the flexible display 106 to control the flexible display 106 of the display device 100 to display images.
  • the foldable display device can be a foldable display device such as a mobile phone or a foldable screen.
  • the bendable first support plate 103 and the second support plate 104 are attached to the flexible display screen 106 respectively to achieve good support and bendability. function; in addition, the outer cover window 1061 of the outermost layer of the flexible display screen 106 is attached to the second support plate 104; through the setting of the first folding frame 101, the hinge 1071, and the second folding frame 102, the display device 100 can It is folded into a wedge shape, and the thickness after folding can be reduced, so that the folded display device is easy to carry and store; and through the setting of the pretensioning component 105, the chance of forming creases after the flexible display 106 is bent multiple times is reduced, and the stability of the screen is improved.
  • the flatness of the bending area improves the overall user experience of the flexible display screen 106 .

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

Abstract

一种显示装置（100），包括第一折叠机架（101）、第二折叠机架（102）、第一支撑板件（103）、第二支撑板件（104）、预紧组件（105）以及柔性显示屏（106）。第二折叠机架（102）与第一折叠机架（101）相对转动。第一支撑板件（103）设置于第一折叠机架（101）及第二折叠机架（102）上，且包括弯折结构（1031）。弯折结构（1031）连接第一折叠机架（101）与第二折叠机架（102）。第二支撑板件（104）至少设置于第一支撑板件（103）一侧。预紧组件（105）与第二支撑板件（104）相连接。柔性显示屏（106）设置于第一支撑板件（103）及第二支撑板件（104）上，且与第二支撑板件（104）相连接。预紧组件（105）用于向柔性显示屏（106）提供预紧力。

Description

显示装置 技术领域
本申请涉及显示技术领域，特别是一种具有预紧组件的显示装置。
 背景技术
有机发光二极管(organic light emitting diode,OLED)显示技术日趋成熟极大地推动了折叠手机、折叠笔记本电脑的商用市场。折叠显示产品深受广大消费者的亲睐。然而，折痕问题一直是影响折叠手机市场进一步扩大的主要原因之一。目前，针对手机如何有效降低OLED屏幕折痕问题，尚未找到合理解决方案。
引起OLED显示屏折痕问题的因素较为复杂，主要包括以下原因。由于折叠显示装置，例如折叠手机的铰链设计不合理，导致手机在使用过程中，屏幕不能自然地完成折叠与展开动作。再者折叠手机中框结构和屏幕之间存在运动轨迹上的拉扯、挤压等行为，弯折次数达到一定数量时，OLED模组叠构材料之间的微观损伤将会累积到一定程度，因而演变成肉眼可见的折痕。另外，目前折叠手机因追求轻薄化设计，对OLED屏幕的弯折半径提出更苛刻的要求，即弯折半径越小则越利于整机的轻薄化设计。因此OLED模组在较小的弯折半径条件下，在弯折区局部变形往往最为严重，当局部应变超过模组材料层的极限塑性应变值时，就会形成不可恢复的塑性变形，随着弯折次数的增加，膜层本身的塑性应变逐渐演变成宏观的折痕。
因此，需要一种显示装置，以解决现有技术存在的问题。
 技术问题
现有的折叠显示装置的技术问题在于，当现有的折叠显示装置的弯折区被多次弯折后，会产生不可恢复的塑性变形，因而形成折痕。
 技术解决方案
为解决上述技术问题，本申请的一目的在于提供一种显示装置，使得柔性显示屏多次弯折后形成折痕的机会降低，提高屏幕的弯折区的平整度，以此提升柔性显示屏整体使用体验。
基于上述目的，本申请提供一种显示装置，其包括第一折叠机架、第二折叠机架、第一支撑板件、至少一第二支撑板件、至少一预紧组件以及柔性显示屏。第二折叠机架与第一折叠机架相对转动。第一支撑板件设置于第一折叠机架及第二折叠机架上，且包括弯折结构。所述弯折结构连接所述第一折叠机架与所述第二折叠机架。至少一第二支撑板件至少设置于第一支撑板件一侧。至少一预紧组件，与所述第二支撑板件相连接。柔性显示屏设置于第一支撑板件及至少一第二支撑板件上，且与所述第二支撑板件相连接。至少一预紧组件用于向柔性显示屏提供预紧力。
在本申请的显示装置的一实施例中，至少一预紧组件设置于第一折叠机架与至少一第二支撑板件之间和/或第二折叠机架与至少一第二支撑板件之间。
在本申请的显示装置的一实施例中，至少一预紧组件包括至少一弹性元件，至少一弹性元件产生预紧力。
在本申请的显示装置的一实施例中，至少一弹性元件通过至少一连接元件与至少一第二支撑板件相连接，至少一连接元件贯穿至少一第一通孔。
在本申请的显示装置的一实施例中，柔性显示屏包括外盖视窗及多个功能层，外盖视窗覆盖于多个功能层之顶表面及一侧面及至少一第二支撑板件之底表面，外盖视窗与至少一预紧组件相连接。
在本申请的显示装置的一实施例中，至少一第二通孔定义于外盖视窗上，至少一第二通孔与至少一第一通孔连通，至少一连接元件贯穿至少一第一通孔及至少一第二通孔。
在本申请的显示装置的一实施例中，至少一连接元件为销钉，至少一弹性元件为弹簧，至少一第一通孔具有第一部分及第二部分，第一部分之宽度小于至少一连接元件之顶部，第二部分之宽度大于至少一连接元件之顶部。
在本申请的显示装置的一实施例中，至少一第一通孔的形状为重叠的两个圆形或三角形。
在本申请的显示装置的一实施例中，第二支撑板件包括高于第一部分之侧壁。
在本申请的显示装置的一实施例中，至少一凹槽对应至少一第一通孔之位置定义于至少一第一折叠机架或第二折叠机架上，至少一预紧组件嵌设于至少一凹槽中。
在本申请的显示装置的一实施例中，外盖视窗包括透明聚酰亚胺或聚对苯二甲酸乙二酯。
在本申请的显示装置的一实施例中，本发明之显示装置更包括枢接组件，枢接组件与第一折叠机架及第二折叠机架相连接。
在本申请的显示装置的一实施例中，显示装置更包括枢接组件，枢接组件包括至少一铰链及保护盖，枢接组件包括至少一铰链及保护盖，至少一铰链与第一折叠机架及第二折叠机架相连接，保护盖覆盖至少一铰链以及部分第一折叠机架及第二折叠机架。
在本申请的显示装置的一实施例中，显示装置更包括驱动模组，驱动模组与柔性显示屏电性连接，控制显示装置的柔性显示屏显示影像。
在本申请的显示装置的一实施例中，多个孔洞定义于第一支撑板件上，形成弯折结构，第一支撑板件及至少一第二支撑板件包括金属、弹性材料、柔性材料、复合材料中的一种或多种。
本申请再提供一种显示装置，包括：第一折叠机架；第二折叠机架，与第一折叠机架相对转动；第一支撑板件，设置于第一折叠机架及第二折叠机架上，且包括弯折结构，其中，弯折结构连接第一折叠机架与第二折叠机架；多个第二支撑板件，至少设置于第一支撑板件两侧；多个预紧组件，与第二支撑板件相连接；及柔性显示屏，设置于第一支撑板件及多个第二支撑板件上，且与第二支撑板件相连接，其中，多个预紧组件用于向柔性显示屏提供一预紧力。
在本申请的显示装置的一实施例中，多个预紧组件包括弹性元件，弹性元件产生预紧力。
在本申请的显示装置的一实施例中，弹性元件通过多个连接元件与多个第二支撑板件相连接，多个连接元件贯穿定义于多个第二支撑板件上的多个第一通孔。
在本申请的显示装置的一实施例中，柔性显示屏包括外盖视窗及多个功能层，外盖视窗覆盖于多个功能层之顶表面，外盖视窗与多个预紧组件相连接。
在本申请的显示装置的一实施例中，多个第二通孔定义于外盖视窗上，多个第二通孔与多个第一通孔连通，多个连接元件贯穿多个第一通孔及多个第二通孔。
在本申请的显示装置的一实施例中，多个连接元件为销钉，弹性元件为弹簧，多个第一通孔具有第一部分及第二部分，第一部分之宽度小于至少一连接元件之顶部，第二部分之宽度大于至少一连接元件之顶部。
在本申请的显示装置的一实施例中，显示装置更包括枢接组件，枢接组件包括至少一铰链及保护盖，至少一铰链与第一折叠机架及第二折叠机架相连接，保护盖覆盖至少一铰链以及部分第一折叠机架及第二折叠机架。
 有益效果
本申请的有益效果在于向柔性显示屏提供预紧力，使柔性显示屏在多次弯折后形成折痕的机会降低，并可提高屏幕的弯折区的平整度。
 附图说明
图1为本申请实施例的折叠显示装置的方框图。
图2为本申请实施例的显示装置的第一展开示意图。
图3为本申请实施例的显示装置的第一折叠示意图。
图4为本申请实施例的显示装置的第一组装示意图。
图5为本申请实施例的显示装置的预紧组件的示意图。
图6为本申请实施例的显示装置的第二支撑板件的第一示意图。
图7为本申请实施例的显示装置的第二支撑板件的第二示意图。
图8为本申请实施例的显示装置的第二组装示意图。
图9为本申请实施例的显示装置的第三组装示意图。
图10为本申请实施例的显示装置的第四组装示意图。
图11为本申请实施例的显示装置的第五组装示意图。
图12为本申请实施例的显示装置的第二折叠示意图。
图13为本申请实施例的显示装置的第二展开示意图。
图14为本申请实施例的显示装置的示意图。
图15为本申请实施例的柔性显示屏的仿真图。
 本发明的最佳实施方式
为了让本申请的上述及其他目的、特征、优点能更明显易懂，下文将特举本申请优选实施例，并配合所附图式，作详细说明如下。再者，本申请所提到的方向用语，例如上、下、顶、底、前、后、左、右、内、外、侧层、周围、中央、水平、横向、垂直、纵向、轴向、径向、最上层或最下层等，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，结构相似的单元是以相同标号表示。
请参阅图1，本申请的显示装置100包括第一折叠机架101、第二折叠机架102、第一支撑板件103、第二支撑板件104、预紧组件105、柔性显示屏106以及枢接组件107。
进一步说明，如图2至图14所示，第二折叠机架102与第一折叠机架101相对转动。具体地，第二折叠机架102与第一折叠机架101相互枢接或铰接。且在一实施例中，本申请的显示装置100更包含枢接组件107。枢接组件107可与第一折叠机架101及第二折叠机架102相连接，因此藉由第一折叠机架101、第二折叠机架102及枢接组件107的设置，如图2及图3所示，显示装置100可被折叠或展开。
在一实施例中，如图4、图11至图13所示，枢接组件107包括至少一铰链1071及保护盖1072。至少一铰链1071与第一折叠机架101及第二折叠机架102相连接。保护盖1072覆盖至少一铰链1071以及部分第一折叠机架101及第二折叠机架102，以保护至少一铰链1071以及部分第一折叠机架101及第二折叠机架102。但并不以此为限，枢接组件107亦可包括齿轮、转轴、阻尼机构等，可依实际需求进行配置。
如图8至图11所示，第一支撑板件103设置于第一折叠机架101及第二折叠机架102上，且包括弯折结构1031。弯折结构1031之位置对应第一折叠机架101与第二折叠机架102之枢接位置。且在一实施例中，多个孔洞定义于第一支撑板件103上，形成具有图案化网孔结构的弯折结构1031。第一支撑板件103主要用于保证柔性显示屏106的可弯折性、支撑性及平整性。
进一步说明，在一实施例中，第一支撑板件103包括金属、弹性材料、柔性材料、复合材料中的一种或多种。具体的，第一支撑板件103可包括不锈钢，且在第一支撑板件103进行图案化处理及其它制程，可形成弯折结构1031，但不以此为限。
在另一实施例中，第一支撑板件103的弯折结构1031可为弹性材料、柔性材料、复合材料中的一种或多种所制成，而第一支撑板件103的其它部分可由金属，例如不锈钢所制成，以确保显示装置100的刚性及平整性。
如图6至图10所示至少一第二支撑板件104至少设置于第一支撑板件103一侧，至少一第一通孔1041定义于至少一第二支撑板件104上。在一实施例中，第二支撑板件104为可滑移的设置于第一支撑板件103一侧，但不以此为限，第二支撑板件104及第一支撑板件103可依第一折叠机架101及第二折叠机架102的结构进行设置。
进一步说明，在一实施例中，第二支撑板件104包括金属、弹性材料、柔性材料、复合材料中的一种或多种。具体的，第二支撑板件104可包括不锈钢。
如图8及图10所示，可仅有一个第二支撑板件104设置于第一支撑板件103一侧。也可如图9所示，两个第二支撑板件104分别设置于第一支撑板件103两侧。但不以此为限，第二支撑板件104的数目及设置位置可依据需要显示的面积、第一折叠机架101及第二折叠机架102的结构等因素进行决定。
进一步说明，若是柔性显示屏106的长度较短，可仅以一个第二支撑板件104设置于第一支撑板件103一侧。然而，若是柔性显示屏106的长度较长，在不变更第一支撑板件103面积的情况下，可再增设另一第二支撑板件104于第一支撑板件103的另一侧。
至少一预紧组件105用于向柔性显示屏106提供预紧力。预紧组件105可设置于第一折叠机架101与至少一第二支撑板件104之间和/或第二折叠机架102与至少一第二支撑板件104之间。具体地，如图4至图11及图13至图14所示，至少一预紧组件105可对应至少一第一通孔1041，设置于第一折叠机架101或第二折叠机架102及至少一第二支撑板件104之间。
在一实施例中，图9为四个预紧组件105对应四个第一通孔1041，而图11为两个预紧组件105对应两个第一通孔1041。参照图13及图14，可以看出预紧组件105设置于第一折叠机架101及第二支撑板件104之间。但不以此为限。
在一实施例中，预紧组件105设置亦可设置于第二折叠机架102上，此时第二支撑板件104设置在第二折叠机架102上，因此预紧组件105设置于第二折叠机架102及第二支撑板件104之间。
具体的，如图5、图10及图14所示，预紧组件105可包括至少一弹性元件1052，弹性元件1052可产生预紧力。在一实施例中，至少一弹性元件1052通过至少一连接元件1051与至少一第二支撑板件104相连接。至少一连接元件1051贯穿定义于至少一第二支撑板件104上的至少一第一通孔1041。换言之，可为多个连接元件1051搭配一个弹性元件1052；亦可为多个连接元件1051搭配多个弹性元件1052，可依实际需求进行配置。
当第一折叠机架101、第二折叠机架102等元件已设置完毕后，柔性显示屏106可设置于第一支撑板件103及至少一第二支撑板件104上，且柔性显示屏106与至少一连接元件1051相连接。
另外，如图10、图13、图14所示，至少一连接元件1051贯穿至少一第一通孔1041，至少一弹性元件1052与至少一连接元件1051相连接，并向至少一连接元件1051提供朝向第一折叠机架101或第二折叠机架102之侧边之预紧力，举例来说，如图13、图14所示，弹性元件1052提供朝向第二折叠机架102远离第一折叠机架101侧边之预紧力，但并不以此为限。
在一实施例中，如图14所示，柔性显示屏106包括外盖视窗1061及多个功能层1062，外盖视窗1061覆盖于多个功能层1062之顶表面及一侧面及至少一第二支撑板件104之底表面。多个功能层1062可包括阴极层、发光层、阳极层等。另外，柔性显示屏106可为柔性有机发光晶体管屏幕，外盖视窗1061可包括透明聚酰亚胺、聚对苯二甲酸乙二酯(polyethylene terephthalate,PET)塑料等。
在一实施例中，如图14所示，外盖视窗1061与至少一预紧组件105相连接。具体地，至少一第二通孔1063定义于外盖视窗1061上，至少一第二通孔1063与至少一第一通孔1041连通。至少一连接元件1051贯穿至少一第一通孔1041及至少一第二通孔1063，外盖视窗1061通过连接元件1051与弹性元件1052连接。进一步说明，第一通孔1041及第二通孔1063可依据连接元件1051的数目进行设置，并无限定。
在一实施例中，如图14所示，第二支撑板件104可与柔性显示屏106的外盖视窗1061贴合后，将柔性显示屏106的外盖视窗1061弯折180°。贴合时，外盖视窗1061被施加预紧力，拉直后进行胶粘连接。通过此种方式，使得柔性显示屏106的外盖视窗1061相对与其多个功能层1062始终被施加预紧力，而不影响显示器件层的受力状态，从而使得柔性显示屏106的外表面具有良好的平整性。
在一实施例中，至少一连接元件1051可为销钉，至少一弹性元件1052可为弹簧。至少一第一通孔1041具有第一部分1042及第二部分1043。如图6及图10所示，第一部分1042之宽度小于至少一连接元件1051之顶部，第二部分1043之宽度大于至少一连接元件1051之顶部，由于第一部分1042之小于连接元件1051之顶部，连接元件1051被移动到第一部分1042时可被固定，当连接元件1051由第一部分1042移动至第二部分1043时，由于二部分1043的宽度大于连接元件1051的顶部，有利于连接元件1051与第二支撑板件104的拆卸。在此实施例中，第一通孔1041的形状为重叠的两个圆形，但不以此为限，只要可利于连接元件1051固定于第一通孔1041的形状皆应包含于本申请中，例如第一通孔1041亦可为三角形。
另外，在一实施例中，如图6所示，第二支撑板件104还具有高于第一部分1042之侧壁1044，以供至少一连接元件1051抵靠，以增加连接元件1051与第二支撑板件104的接触面积，使得连接元件1051可对第二支撑板件104施加更平均的力量，便于拆装与维修，并增强连接可靠性。
在一实施例中，如图4、图6至图8及图10至图11所示，至少一凹槽1011对应至少一第一通孔1041之位置定义于至少一第一折叠机架101或第二折叠机架102上。至少一预紧组件105嵌设于至少一凹槽1011中。具体而言，凹槽1011及第一通孔1041的数目及位置可依据预紧组件105的数目或是连接元件1051的数目及位置进行设置。举例来说，若是第一折叠机架101及第二折叠机架102上分别设置有两个连接元件1051，则需要有如图9所示的四个第一通孔1041，且亦需要四个凹槽1011定义于第一折叠机架101及第二折叠机架102上。
在组装过程中，可调整弹性元件1052的弹性刚度范围。举例而言，若是弹性元件1052为弹簧，可选用弹簧的材质，或是调整弹簧的长度，以调整弹性刚度范围，使得柔性显示屏106在弯折和展开过程中均能保持良好的预紧力，且不影响柔性显示屏106的显示器件层的受力状态，避免模组因过大的外拉力失效，从而降低柔性显示屏106多次弯折后形成折痕的机会，提高屏幕的弯折区的平整度，以此提升柔性显示屏106整体使用体验。
举例来说，如图11所示，在具有两个预紧组件105的情况下，柔性显示屏106于折叠时最大的范式等效应力（Von Mises Stress）为2.694e+02N/m2，展开时为1.284+e01N/m2。另外，如图15的(b)部分所示，使用预紧组件105的柔性显示屏106展开后相较于图15的(a)部分未使用预紧组件105的柔性显示屏106平缓，因此图15的(b)部分的柔性显示屏106的平整度较图15的(a)部分的柔性显示屏106高。
折叠显示装置的驱动模组可与柔性显示屏106电性连接，以控制显示装置100的柔性显示屏106显示影像。折叠显示装置可为行动电话、折叠屏幕等可折叠的显示装置。
综上所述，本申请的显示装置100中，可弯折的第一支撑板件103和第二支撑板件104与柔性显示屏106分别贴合，实现良好的支撑性且可弯折性的功能；另外，柔性显示屏106最外层的外盖视窗1061与第二支撑板件104贴合；通过第一折叠机架101、铰链1071、第二折叠机架102的设置，显示装置100可折叠成楔形，并且可减少折叠后的厚度，使得折叠显示装置便于携带、收纳；并且透过预紧组件105的设置，柔性显示屏106多次弯折后形成折痕的机会降低，提高屏幕的弯折区的平整度，以此提升柔性显示屏106整体使用体验。
尽管已经相对于一个或多个实现方式示出并描述了本申请，但是本领域技术人员基于对本说明书和附图的阅读和理解将会想到等价变型和修改。本申请包括所有这样的修改和变型，并且仅由所附权利要求的范围限制。特别地关于由上述组件执行的各种功能，用于描述这样的组件的术语旨在对应于执行所述组件的指定功能（例如其在功能上是等价的）的任意组件（除非另外指示），即使在结构上与执行本文所示的本说明书的示范性实现方式中的功能的公开结构不等同。此外，尽管本说明书的特定特征已经相对于若干实现方式中的仅一个被公开，但是这种特征可以与如可以对给定或特定应用而言是期望和有利的其他实现方式的一个或多个其他特征组合。而且，就术语“包括”、“具有”、“含有”或其变形被用在具体实施方式或权利要求中而言，这样的术语旨在以与术语“包含”相似的方式包括。
以上仅是本申请的优选实施方式，应当指出，对于本领域普通技术人员，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。

Claims (19)

  1. 如权利要求1所述的显示装置，其中，所述至少一预紧组件设置于所述第一折叠机架与所述至少一第二支撑板件之间或所述第二折叠机架与所述至少一第二支撑板件之间。
  2. 如权利要求2所述的显示装置，其中，所述至少一预紧组件包括至少一弹性元件，所述至少一弹性元件产生所述预紧力。
  3. 如权利要求3所述的显示装置，其中，所述至少一弹性元件通过至少一连接元件与所述至少一第二支撑板件相连接，所述至少一连接元件贯穿定义于所述至少一第二支撑板件上的至少一第一通孔。
  4. 如权利要求2所述的显示装置，其中，所述柔性显示屏包括外盖视窗及多个功能层，所述外盖视窗覆盖于所述多个功能层之顶表面及一侧面及所述至少一第二支撑板件之底表面，所述外盖视窗与所述至少一预紧组件相连接。
  5. 如权利要求5所述的显示装置，其中，至少一第二通孔定义于所述外盖视窗上，所述至少一第二通孔与所述至少一第一通孔连通，所述至少一连接元件贯穿所述至少一第一通孔及所述至少一第二通孔。
  6. 如权利要求4所述的显示装置，其中，所述至少一连接元件为销钉，所述至少一弹性元件为弹簧，所述至少一第一通孔具有第一部分及第二部分，所述第一部分之宽度小于所述至少一连接元件之顶部，所述第二部分之宽度大于所述至少一连接元件之所述顶部。
  7. 如权利要求7所述的显示装置，其中，所述至少一第一通孔的形状为重叠的两个圆形或三角形。
  8. 如权利要求7所述的显示装置，其中，所述第二支撑板件包括高于所述第一部分之侧壁。
  9. 如权利要求4所述的显示装置，其中，至少一凹槽对应所述至少一第一通孔之位置定义于至少一所述第一折叠机架或所述第二折叠机架上，所述至少一预紧组件嵌设于所述至少一凹槽中。
  10. 如权利要求5所述的显示装置，其中，所述外盖视窗包括透明聚酰亚胺或聚对苯二甲酸乙二酯。
  11. 如权利要求1所述的显示装置，其中，所述显示装置更包括枢接组件，所述枢接组件包括至少一铰链及保护盖，所述至少一铰链与所述第一折叠机架及所述第二折叠机架相连接，所述保护盖覆盖所述至少一铰链以及部分所述第一折叠机架及所述第二折叠机架。
  12. 如权利要求1所述的显示装置，其中所述显示装置更包括驱动模组，所述驱动模组与所述柔性显示屏电性连接，控制所述显示装置的所述柔性显示屏显示影像。
  13. 如权利要求1所述的显示装置，其中，多个孔洞定义于所述第一支撑板件上，形成所述弯折结构，所述第一支撑板件及所述至少一第二支撑板件包括金属、弹性材料、柔性材料、复合材料中的一种或多种。
  14. 一种显示装置，包括：
    第一折叠机架，及
    第二折叠机架，与所述第一折叠机架相对转动；
    第一支撑板件，设置于所述第一折叠机架及所述第二折叠机架上，且包括弯折结构，其中，所述弯折结构连接所述第一折叠机架与所述第二折叠机架；
    多个第二支撑板件，至少设置于所述第一支撑板件两侧；
    多个预紧组件，与所述第二支撑板件相连接；及
    柔性显示屏，设置于所述第一支撑板件及所述多个第二支撑板件上，且与所述第二支撑板件相连接，
    其中，所述多个预紧组件用于向所述柔性显示屏提供一预紧力。
  15. 如权利要求15所述的显示装置，其中，所述多个预紧组件包括弹性元件，所述弹性元件产生所述预紧力。
  16. 如权利要求16所述的显示装置，其中，所述弹性元件通过多个连接元件与所述多个第二支撑板件相连接，所述多个连接元件贯穿定义于所述多个第二支撑板件上的多个第一通孔。
  17. 如权利要求15所述的显示装置，其中，所述柔性显示屏包括外盖视窗及多个功能层，所述外盖视窗覆盖于所述多个功能层之顶表面，所述外盖视窗与所述多个预紧组件相连接。
  18. 如权利要求17所述的显示装置，其中，所述多个连接元件为销钉，所述弹性元件为弹簧，所述多个第一通孔具有第一部分及第二部分，所述第一部分之宽度小于所述至少一连接元件之顶部，所述第二部分之宽度大于所述至少一连接元件之所述顶部。
  19. 如权利要求15所述的显示装置，其中，所述显示装置更包括枢接组件，所述枢接组件包括至少一铰链及保护盖，所述至少一铰链与所述第一折叠机架及所述第二折叠机架相连接，所述保护盖覆盖所述至少一铰链以及部分所述第一折叠机架及所述第二折叠机架。
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