WO2024045334A1 - 显示模组及显示装置 - Google Patents

显示模组及显示装置 Download PDF

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Publication number
WO2024045334A1
WO2024045334A1 PCT/CN2022/130726 CN2022130726W WO2024045334A1 WO 2024045334 A1 WO2024045334 A1 WO 2024045334A1 CN 2022130726 W CN2022130726 W CN 2022130726W WO 2024045334 A1 WO2024045334 A1 WO 2024045334A1
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WO
WIPO (PCT)
Prior art keywords
stiffness
display module
bending
along
supporting member
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/CN2022/130726
Other languages
English (en)
French (fr)
Inventor
张雷超
张方
王煜
朱修剑
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.)
Kunshan Govisionox Optoelectronics Co Ltd
Hefei Visionox Technology Co Ltd
Original Assignee
Kunshan Govisionox Optoelectronics Co Ltd
Hefei Visionox 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 Kunshan Govisionox Optoelectronics Co Ltd, Hefei Visionox Technology Co Ltd filed Critical Kunshan Govisionox Optoelectronics Co Ltd
Priority to KR1020247018544A priority Critical patent/KR20240091331A/ko
Publication of WO2024045334A1 publication Critical patent/WO2024045334A1/zh
Priority to US18/820,281 priority patent/US20240422927A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • 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
    • H05K5/02—Details
    • H05K5/0217—Mechanical details of casings
    • 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
    • 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
    • G09F9/335—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 being organic light emitting diodes [OLED]
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates

Definitions

  • the present application relates to the field of display technology, and in particular, to a display module and a display device.
  • Flexible display panels have special product shapes such as folding, large-angle bending, and curling, and are increasingly used.
  • a foldable display panel can obtain a larger display area when the display panel is flattened; when the display panel is folded, it can have a smaller storage volume and is easy to carry, thus attracting widespread attention.
  • a display module may include a display panel and a supporting member. The supporting member is located on the backlight side of the display panel to support the display panel.
  • embodiments of the present application provide a display module and a display device, which can improve the creases of the display module, thereby extending the overall life of the display module and the display device.
  • the first aspect of the embodiments of the present application provides a display module, including a stacked flexible screen and a supporting member, the supporting member being located on the backlight side of the flexible screen; the supporting member including a fixing portion arranged along a first direction, A first bending part and a second bending part.
  • the first bending part is located between the fixed part and the second bending part.
  • the second bending part includes a central part and main main parts located on opposite sides of the central part along the first direction. The stiffness of the bending part and the central part is greater than the stiffness of the main bending part.
  • the display module may include a stacked flexible screen and a supporting member.
  • the supporting member is located on the backlight side of the flexible screen, and the supporting member can form a certain support for the flexible screen.
  • the supporting member may include a fixing part, a first bending part and a second bending part arranged along the first direction, and the first bending part is located between the fixing part and the second bending part.
  • the second bending part may include a central part and main bending parts located on opposite sides of the central part along the first direction, and the stiffness of the central part is greater than the stiffness of the main bending part.
  • the deformation of the central portion during bending is smaller, and the bending radius of the central portion is larger, which can alleviate the creases in the central portion and extend the overall life of the display module and display device.
  • the stiffness of the main bending part is small, and the main bending part is prone to bending.
  • the stress in the second bending part will be mainly distributed on the main bending parts on both sides of the central part instead of the central part, so that it can Change the bending shape of the support in the bending area to avoid stress concentration in the center and causing serious creases.
  • the stiffness of the first bending part is greater than the stiffness of the central part
  • the stiffness of the fixed part is greater than the stiffness of the first bending part
  • the stiffness of the main bending part gradually decreases along the direction from the center part to the main bending part; or, the stiffness of the main bending part first decreases and then increases along the direction from the center part to the main bending part;
  • the average stiffness within two adjacent unit areas of the second bending part is the first stiffness and the second stiffness respectively, and the absolute value of the difference between the first stiffness and the second stiffness is divided by the first stiffness.
  • the range is 0.05-0.2;
  • the extension length of the central part is 1mm-2mm;
  • the supporting member has an integral structure.
  • the deformation of the first bending part during bending is smaller, and the bending radius of the first bending part is larger, thereby alleviating the crease of the first bending part.
  • the supporting member further includes a connecting portion, the connecting portion is located between the second bending portion and the first bending portion, and the stiffness of the connecting portion is greater than the stiffness of the first bending portion;
  • the stiffness of the connecting part is equal to the stiffness of the fixed part.
  • the fixing part and the connecting part are not easily bent and remain flat.
  • the fixed part and the connecting part have a better supporting effect on the flexible screen.
  • a plurality of through holes are provided at intervals on the supporting member, the through holes penetrate the supporting member along the thickness direction of the supporting member, and the sum of the areas of all the through holes in the central part within the unit area is less than The sum of the areas of all through holes in the main bending part within the unit area;
  • the cross-section of the through hole is strip-shaped, the through hole extends along the second direction, and the second direction is perpendicular to the first direction;
  • the through hole in the same through hole, includes a first end and a second end and a middle section between the first end and the second end, and the first end, the second end and the middle section
  • the extension length along the first direction is greater than the extension length along the first direction of the remaining portion of the through hole;
  • a plurality of through holes arranged at intervals along the second direction constitute a through hole group.
  • the plurality of through hole groups are arranged at intervals along the first direction.
  • the through holes are staggered along the second direction.
  • the stiffness of the central part can be greater than that of the main bending part.
  • the area of each through hole is the same, and the distance between two adjacent through holes in the central part is greater than the distance between two adjacent through holes in the main bending part;
  • the spacing between two adjacent through holes of the main bending part gradually decreases along the direction from the central part to the main bending part; or the spacing between two adjacent through holes of the main bending part decreases along the central part.
  • the direction to the main bend first decreases and then increases.
  • the distance between the centers of any two adjacent through holes is the same, and the area of the through hole in the central part is smaller than the area of the through hole in the main bending part;
  • the area of the through hole of the main bending part gradually increases along the direction from the center part to the main bending part; or, the area of the through hole of the main bending part first increases along the direction from the center part to the main bending part. Increase and then decrease.
  • the supporting member is provided with a groove, and the notch of the groove is located on at least one of two opposite surfaces along the thickness direction of the supporting member.
  • the minimum thickness of the central part is greater than the minimum thickness of the main bending part
  • the minimum thickness of the central part first increases and then decreases along the first direction
  • the minimum thickness of the main bending part gradually decreases along the direction from the center part to the main bending part, or the minimum thickness of the main bending part first decreases and then increases along the direction from the center part to the main bending part. big.
  • the stiffness of the support can be adjusted through the minimum thickness.
  • the supporting member includes a first supporting layer, a connecting layer and a second supporting layer that are stacked in sequence.
  • the second supporting layer has an opening, and the opening runs through the supporting member in the thickness direction.
  • the second supporting layer has an opening located at the main bending part;
  • the supporting member further includes a connecting portion, the connecting portion is located between the second bending portion and the first bending portion, the second supporting layer of the connecting portion, the second supporting layer of the central portion and the main bending portion.
  • the connecting layer of the folded portion is surrounded by a groove.
  • the thickness of the second supporting layer is greater than the thickness of the first supporting layer
  • the thickness of the second supporting layer of the central part is smaller than the thickness of the second supporting layer of the fixing part.
  • a first aspect of the embodiments of the present application provides a display device, including a first support member, a second support member and the display module in the first aspect.
  • the first support member and the second support member are both located on the display module.
  • the first supporting member is provided correspondingly to the fixing part of the supporting member, and the second supporting member is provided correspondingly to the connecting part of the supporting member.
  • the display device includes a display module.
  • the display module may include a stacked flexible screen and a supporting member.
  • the supporting member is located on the backlight side of the flexible screen.
  • the supporting member can form a shape on the flexible screen.
  • the supporting member may include a fixing part, a first bending part and a second bending part arranged along the first direction, and the first bending part is located between the fixing part and the second bending part.
  • the second bending part may include a central part and main bending parts located on opposite sides of the central part along the first direction, and the stiffness of the central part is greater than the stiffness of the main bending part.
  • the deformation of the central portion during bending is smaller, and the bending radius of the central portion is larger, which can alleviate the creases in the central portion and extend the overall life of the display module and display device.
  • the stiffness of the main bending part is small, and the main bending part is prone to bending.
  • the stress in the second bending part will be mainly distributed on the main bending parts on both sides of the central part instead of the central part, so that it can Change the bending shape of the support in the bending area to avoid stress concentration in the center and causing serious creases.
  • Figure 1 is a schematic structural diagram of a supporting member in a folded state
  • Figure 2a is a schematic structural diagram of a display module in a flattened state according to an embodiment of the present application
  • Figure 2b is another structural schematic diagram of a display module in a flattened state according to an embodiment of the present application
  • Figure 3 is a schematic structural diagram of the folded state of the display module provided by the embodiment of the present application.
  • Figure 4 is a schematic structural diagram of the supporting member provided by the embodiment of the present application.
  • Figure 5 is a top view of the supporting member provided by the embodiment of the present application.
  • Figure 6 is a schematic structural diagram of a supporting member provided with through holes according to an embodiment of the present application.
  • Figure 7 is a schematic structural diagram of the distribution of through holes in the second bending part provided by the embodiment of the present application.
  • Figure 8 is another structural schematic diagram of the through hole distribution of the second bending part provided by the embodiment of the present application.
  • Figure 9 is a schematic structural diagram of the through-hole distribution of the main bending portion provided by the embodiment of the present application.
  • Figure 10 is another structural schematic diagram of the through hole distribution of the main bending portion provided by the embodiment of the present application.
  • Figure 11 is another structural schematic diagram of the through hole distribution of the second bending portion provided by the embodiment of the present application.
  • Figure 12 is a schematic structural diagram of the groove provided by the embodiment of the present application, with the notch located on the first surface;
  • Figure 13 is a schematic structural diagram of the groove provided by the embodiment of the present application, with the notch located on the second surface;
  • Figure 14 is a schematic structural diagram of the groove provided by the embodiment of the present application, with the notch located on the first surface and the second surface;
  • Figure 15 is a schematic structural diagram of a multi-layer stacked structure of the supporting member provided by the embodiment of the present application.
  • Figure 16 is a graph showing the crease depth of the display module in Examples 1 and 2;
  • Figure 17 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • Figure 18 is a schematic structural diagram of a display device in a flat state according to an embodiment of the present application.
  • FIG. 19 is a schematic structural diagram of a display device in a folded state according to an embodiment of the present application.
  • 200 display module; 200a: bending area;
  • Second non-bending area 202b: Second non-bending area
  • 210 Protective layer
  • 220 Flexible screen
  • 221 Buffer layer
  • 222 Luminous layer
  • 223 Filter layer
  • 2254 The fourth connection layer; 300/300’: Supporting parts;
  • 300a first surface
  • 300b second surface
  • 321 The first sub-bending part
  • 322 The second sub-bending part
  • 332 Main bending part; 3321: First main bending part;
  • 341 The first connecting part
  • 342 The second connecting part
  • 351 The first supporting layer
  • 352 The second supporting layer
  • 355 The fifth connection layer; 360: Through hole group;
  • a display module can include a flexible screen and a supporting member.
  • the supporting member is located on the backlight side of the flexible screen, and the supporting member can form a certain support for the flexible screen.
  • the supporting member can drive the flexible screen to bend and flatten under the action of external force.
  • each film layer in the display module located in the bending area is deformed by external force, and the material deformation recovery ability of each film layer is limited.
  • the deformation exceeds the elastic limit of the material, the deformation produced by the material becomes irreversible plastic deformation; after the external force is removed, the deformation cannot be completely eliminated and the material cannot completely restore its original shape.
  • creases are produced in the display module in the bending area, thereby affecting the overall lifespan of the display module and the display device.
  • the supporting member 300' located in the bending area forms a bending portion A.
  • the bending portion A includes a central bending portion T close to the center of the bending portion A.
  • the bending radius of the supporting member 300' is smaller closer to the central bend T.
  • the bending radius of the central curved part T is smaller than the bending radius of the remaining parts of the curved part A, so that the creases of the central curved part T are more serious, resulting in more serious creases of the display module (for example, the creases of the central curved part T are serious).
  • the crease appears in a "V" shape).
  • the display module may include a stacked flexible screen and a supporting member.
  • the supporting member is located on the backlight side of the flexible screen.
  • the supporting member It can form a certain support for the flexible screen.
  • the supporting member may include a fixing part, a first bending part and a second bending part arranged along the first direction, and the first bending part is located between the fixing part and the second bending part.
  • the second bending part may include a central part and main bending parts located on opposite sides of the central part along the first direction, and the stiffness of the central part is greater than the stiffness of the main bending part.
  • the deformation of the central portion during bending is smaller, and the bending radius of the central portion is larger, which can alleviate the creases in the central portion and extend the overall life of the display module and display device.
  • the stiffness of the main bending part is small, and the main bending part is prone to bending.
  • the stress in the second bending part will be mainly distributed on the main bending parts on both sides of the central part instead of the central part, so that it can Change the bending shape of the support in the bending area to avoid stress concentration in the center and causing serious creases.
  • the display module 200 provided by the embodiment of the present application will be described below with reference to Figures 2a-19.
  • the display module 200 may include a flexible screen 220.
  • the flexible screen 220 may be an organic light-emitting diode (OLED for short) display screen, or a Micro Light Emitting Diode (Micro Light Emitting Diode for short) display. For Micro LED or ⁇ LED) display.
  • the flexible screen 220 may include a light emitting side and a backlight side that are arranged oppositely.
  • the light emitting side may be used to display a picture
  • the backlight side is the other side of the flexible screen 220 that is opposite to the light emitting side.
  • the upper side of the flexible screen 220 shown in FIG. 2a is the light emitting side
  • the lower side of the flexible screen 220 shown in FIG. 2a is the backlight side.
  • the display module 200 may include a supporting member 300 , which is located on the backlight side of the flexible screen 220 .
  • the supporting member 300 is used to form a certain support for the flexible screen 220 .
  • the supporting member 300 can improve the flatness of the flexible screen 220, thereby effectively improving the display effect of the flexible screen 220.
  • the supporting member 300 can control the folding form of the flexible screen 220 through its own structural design, thereby improving the user experience.
  • the display module 200 may include a first direction X, which may be the width direction of the display module 200; the display module 200 may include a second direction Y, which may be the width direction of the display module.
  • the length direction of the group 200; the display module 200 may include a third direction, and the third direction may be the thickness direction of the display module 200.
  • the length, width, thickness, etc. in the embodiments of the present application are only for convenience of description and do not imply any limitation on the size.
  • the width can be greater than, equal to, or less than the length.
  • the first direction X can be understood as corresponding to a straight line when the product is unfolded and a curved direction when the product is folded.
  • the display module 200 may include a bending area 200a and a non-bending area 200b, and the bending area 200a and the non-bending area 200b are adjacently arranged.
  • the bending area 200a and the non-bending area 200b may be arranged adjacently along the first direction X (FIG. 5), and the first direction X is the arrangement direction of the bending area 200a and the non-bending area 200b.
  • the number of the bending area 200a and the non-bending area 200b is at least one, and one bending area 200a and one non-bending area 200b are arranged alternately.
  • the number of bending areas 200a may be 1, 2, 3, or any number greater than 3.
  • the number of non-bending areas 200b may be 1, 2, 3, or any number greater than 3.
  • the number of the bending area 200a is one
  • the number of the non-bending areas 200b is two
  • the two non-bending areas 200b are connected by the bending area 200a.
  • the two non-bending areas 200b may include a first non-bending area 201b and a second non-bending area 202b, and the bending area 200a is located in the first non-bending area 201b and the second non-bending area. between 202b.
  • the display module 200 located in the bending area 200a can be bent and flattened, thereby realizing the folding and flattening of the display module 200.
  • the display module 200 can include a flattened state, a folded state, and an intermediate state between the two.
  • the state in which the display module 200 is located is also the state between the flexible screen 220, the supporting member 300 and the display device 100 (Fig. 17) The state in which it is located.
  • the user applies force to the flexible screen 220 through the supporting member 300, and the supporting member 300 can drive the flexible screen 220 to switch between the flattened state and the folded state.
  • the flattened state refers to a state in which each part of the display module 200 is approximately on the same plane.
  • the first non-bending area 201b, the second non-bending area 202b and the bending area 200a are substantially on the same plane, and the included angle between the first non-bending area 201b and the second non-bending area 202b is Roughly 180 degrees.
  • the display area of the display module 200 is larger to ensure a better user experience.
  • the folded state means that the bending area 200a of the display module 200 is bent, and the display module 200 in the first non-bending area 201b and the second non-bending area 202b is in the display module. 200 at least partially overlap in the thickness direction, and the angle between the first non-bending area 201b and the second non-bending area 202b is approximately 0 degrees.
  • the display module 200 and the display device 100 having the display module 200 are smaller in size, which facilitates storage and portability of the display device 100 .
  • the display device 100 may be an inward-folding display device, that is, when the display device 100 is in a folded state, the folded flexible screen 220 is located inside the supporting member 300 , and the supporting member 300 may protect the flexible screen 220 .
  • the flexible screens 220 in the first non-bending area 201b and the second non-bending area 202b are arranged facing each other.
  • the display device 100 may be an outward-folding display device, that is, when the display device 100 is in a folded state, the folded flexible screen 220 is located outside the supporting member 300 , and the flexible screen 220 can implement the display function in the folded state. , to meet the needs of different display scenarios.
  • the flexible screens 220 in the first non-bending area 201b and the second non-bending area 202b are arranged opposite to each other.
  • the flexible screen 220 provided in the embodiment of the present application is described below.
  • a protective layer 210 may be provided between the supporting member 300 and the flexible screen 220, and the protective layer 210 may be used to protect the flexible screen 220.
  • a first connection layer (not shown in the figure) may be provided between the protective layer 210 and the supporting member 300, and a second connection layer may be provided between the protective layer 210 and the flexible screen 220, so that the protective layer 210 can be respectively Stably connected to the supporting member 300 and the flexible screen 220 .
  • the connecting layer (the first connecting layer and/or the second connecting layer) may be formed of an optically transparent adhesive, an optically transparent resin, a pressure-sensitive adhesive, or the like.
  • the flexible screen 220 may include a substrate and a light emitting layer 222 located on the substrate.
  • the substrate provides support for the remaining structural layers that are subsequently placed.
  • the substrate may be a flexible substrate.
  • a buffer layer 221 is provided between the substrate and the light-emitting layer 222. The buffer layer 221 can prevent water and oxygen from penetrating through the substrate and entering the structural layer on the buffer layer 221 to avoid corrosion.
  • the light-emitting layer 222 may include an anode layer, a pixel layer and a cathode layer that are stacked in sequence, and the anode layer is located on a side of the cathode layer facing the substrate.
  • the anode layer may be a pixel electrode, and the cathode layer may be a common electrode.
  • the flexible screen 220 may include a filter layer 223 located on a side of the light-emitting layer 222 facing away from the substrate.
  • the filter layer 223 may be used to reduce reflection of ambient light, thereby improving the display effect of the flexible screen 220 .
  • the filter layer 223 may be a polarizer.
  • the flexible screen 220 may include a cover plate 224 located on a side of the filter layer 223 facing away from the substrate.
  • the cover plate 224 is used to protect the flexible screen 220 to prevent the user from scratching the flexible screen 220 when using the flexible screen 220 .
  • a third connection layer 2253 can be disposed between the cover plate 224 and the filter layer 223.
  • the third connection layer 2253 is used to connect the cover plate 224 and the filter layer 223; in addition, the third connection layer 2253 can also be used to provide Flat surface.
  • a fourth connection layer 2254 may also be provided between the filter layer 223 and the light-emitting layer 222.
  • the supporting member 300 provided in the embodiment of the present application will be described below.
  • the supporting member 300 may include a first surface 300a and a second surface 300b that are oppositely arranged along the thickness direction.
  • the first surface 300a is the surface of the supporting member 300 close to the flexible screen 220
  • the second surface 300b is the surface of the supporting member 300 facing away from the flexible screen 220 .
  • the material of the supporting member 300 may include stainless steel, titanium alloy, magnesium-aluminum alloy and other metal materials.
  • the material of the supporting member 300 may also include non-metallic materials such as glass and plastic.
  • the supporting member 300 may be an integral structure, and all parts of the supporting member 300 may be integral structures, so that the overall structural stability of the supporting member 300 is higher.
  • the supporting member 300 may be a multi-layer stacked structure.
  • the supporting member 300 may include a first supporting layer 351 and a second supporting layer 352 arranged in a stack.
  • the layer 351 and the second supporting layer 352 are connected through a fifth connection layer 355 . That is, the supporting member 300 may include a first supporting layer 351, a fifth connecting layer 355, and a second supporting layer 352 that are stacked in sequence.
  • the first supporting layer 351 may be located on a side of the second supporting layer 352 facing the flexible screen 220 , or the first supporting layer 351 may be located on a side of the second supporting layer 352 facing away from the flexible screen 220 .
  • the embodiment of this application is described by taking the first supporting layer 351 located on the side of the second supporting layer 352 facing the flexible screen 220 as an example.
  • each connection layer in the display module 200 that is, any two connection layers among the first connection layer, the second connection layer, the third connection layer 2253, the fourth connection layer 2254 and the fifth connection layer 355, Any one of the parameters such as thickness can be the same or different.
  • the supporting member 300 may include a fixing part 310 , and the fixing part 310 may be located in the non-bending area 200b (FIG. 5 only shows part of the non-bending area 200b) and is located in the first non-bending area 200b.
  • the fixing part 310 in the folding area 201b may be the first fixing part 311, and the fixing part 310 located in the second non-bending area 202b may be the second fixing part 312.
  • the supporting member 300 further includes a second bending portion 330 located in the bending area 200a.
  • the fixing part 310 and the second bending part 330 are arranged along the first direction X.
  • the second bending part 330 may include a central part 331 and main bending parts 332 located on opposite sides of the central part 331 along the first direction X.
  • a central portion 331 is provided between the two main bending portions 332 , and the main bending portion 332 is located between the fixing portion 310 and the central portion 331 .
  • the main bending part 332 between the first fixing part 311 and the central part 331 is the first main bending part 3321
  • the main bending part 332 between the second fixing part 312 and the central part 331 is the second main bending part. 3322.
  • the extension length of the central portion 331 may range from 1 mm to 2 mm. It is possible to prevent the extension length of the central portion 331 from being too small, thereby avoiding the bending radius of the central portion 331 being too small. It can also prevent the central portion 331 from extending too long, thereby avoiding the central portion 331 from having a great impact on the size of the display device 100 .
  • the extension length of the central portion 331 may be 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm or any value between 1 mm and 2 mm.
  • the supporting member 300 may further include a first bending part 320 , and the first bending part 320 is located between the second bending part 330 and the fixing part 310 .
  • First bending portions 320 are provided on opposite sides of the second bending portion 330 along the first direction X (FIG. 5).
  • the supporting member 300 may further include a connecting portion 340 located between the second bending portion 330 and the first bending portion 320 .
  • the first bending part 320 and the connecting part 340 located between the first fixing part 311 and the second bending part 330 are respectively the first sub-bending part 321 and the first connecting part 341 .
  • the first bending part 320 and the connecting part 340 between the two fixed parts 312 and the second bending part 330 are respectively the second sub-bending part 322 and the second connecting part 342. That is, the supporting member 300 is sequentially arranged along the first direction The folding part 3322, the second connecting part 342, the second sub-bending part 322 and the second fixing part 312.
  • the display module 200 can be bent in a teardrop shape, so that the distance between the two flexible screens 220 in the two non-bent areas 200b is closer, which can reduce external dust from entering between the two flexible screens 220, thereby protecting the flexibility.
  • Screen 220 When the display device 100 is an inward-folding display device, the second bending portion 330 is bent inward and is subjected to compressive stress; the first bending portion 320 is bent outward and is subjected to tensile stress. When the display device 100 is an outward-folding display device, the second bending portion 330 is bent outward and is subjected to tensile stress; the first bending portion 320 is bent inward and is subjected to compressive stress.
  • the following describes the stiffness of the supporting member 300 provided by the embodiment of the present application.
  • the stiffness of the central portion 331 may be greater than the stiffness of the main bending portion 332 .
  • the stiffness of the central portion 331 is relatively large, the deformation of the central portion 331 when bent is small, the bending radius of the central portion 331 is large, and the central portion 331 is relatively flat when bent, thereby alleviating the creases of the central portion 331 , so that the creases of the central portion 331 are relatively flat, which can alleviate the creases of the display module 200 and thereby extend the overall life of the display module 200 and the display device 100 .
  • the stiffness of the main bending part 332 is small, and the main bending part 332 is easier to bend.
  • the bending radius of the main bending part 332 will be smaller than the bending radius of the central part 331, and the stress in the second bending part 330 will be It is mainly distributed on the main bending parts 332 on both sides of the central part 331 instead of the central part 331, so that the bending shape of the supporting member 300 in the bending area 200a can be changed to avoid stress concentration on the central part 331 and serious consequences. creases to alleviate the creases of the display module 200.
  • the stiffness of the central portion 331 may be less than the stiffness of the first bending portion 320 , the first bending portion 320 has a greater stiffness than the central portion 331 , and the first bending portion 320 produces less deformation during bending.
  • the bending radius of the first bending part 320 is larger, so as to alleviate the crease of the first bending part 320, making the crease of the first bending part 320 relatively flat, so as to alleviate the crease of the display module 200, The overall lifespan of the display module 200 and the display device 100 is extended.
  • the rigidity of the fixing part 310 may be greater than the rigidity of the first bending part 320 .
  • the stiffness of the connecting part 340 may be greater than the stiffness of the first bending part 320 .
  • stiffness refers to the ability of a structure to resist elastic deformation when subjected to force, and is a representation of the ease of elastic deformation of the structure. The greater the stiffness, the greater the stress that causes it to deform. The smaller the stiffness, the smaller the stress causing deformation, and the better the bending performance.
  • the stiffness of the central portion 331 may first increase and then decrease, that is, the stiffness of the central portion 331 may gradually decrease from the middle to both sides. In this way, the stiffness of the central part 331 is distributed in a distribution pattern of greater stiffness in the middle and smaller on both sides.
  • the stiffness of the opposite sides of the central part 331 along the first direction Between 331 and the main bending portion 332, local stress concentration occurs due to sudden changes in stiffness. In addition, local stress concentration due to sudden changes in stiffness in the central portion 331 can be avoided, thereby alleviating the creases of the supporting member 300 and avoiding stress concentration. causing the supporting member 300 to break.
  • the stiffness of the main bending portion 332 may gradually decrease along the direction from the central portion 331 to the main bending portion 332, the stiffness of the main bending portion 332 may gradually decrease. In this way, the stiffness of the side of the main bending portion 332 close to the central portion 331 is relatively large, and the stiffness of the side of the main bending portion 332 is relatively close to the stiffness of the central portion 331 . This can avoid local stress concentration caused by sudden changes in stiffness between the central portion 331 and the main bending portion 332 . , In addition, local stress concentration due to sudden changes in stiffness in the main bending portion 332 can be avoided, thereby alleviating the creases of the supporting member 300 and preventing stress concentration from causing the supporting member 300 to break.
  • the stiffness of the main bending part 332 may first decrease and then increase, that is, the stiffness of the main bending part 332 may gradually increase from the middle to both sides. . In this way, the stiffness of the main bending portion 332 is distributed in a distribution pattern of smaller in the middle and larger on both sides. The stiffness of the opposite sides of the main bending portion 332 along the first direction The stiffness is relatively close to the stiffness between the central part 331, which can avoid the local stress concentration caused by sudden changes in stiffness between the central part 331 and the main bending part 332.
  • the stiffness of the side of the main bending portion 332 close to the connecting portion 340 is relatively close to the stiffness of the connecting portion 340 , which can avoid local stress concentration caused by sudden changes in stiffness between the connecting portion 340 and the main bending portion 332 .
  • local stress concentration due to sudden changes in stiffness in the main bending portion 332 can be avoided, thereby alleviating the creases of the supporting member 300 and preventing stress concentration from causing the supporting member 300 to break.
  • the average stiffness within two adjacent unit areas of the second bending portion 330 may be the first stiffness and the second stiffness respectively, and the absolute value of the difference between the first stiffness and the second stiffness is divided by the first
  • the resulting value for stiffness can range from 0.05-0.2. It can be avoided that the stiffness difference between two adjacent second bending portions 330 within the unit area is too small, thereby avoiding that the stiffness difference between the central portion 331 and the main bending portion 332 is too small to alleviate the crease. It can also avoid that the stiffness difference between the second bending portions 330 in two adjacent unit areas is too large, thereby avoiding stress concentration due to a sudden change in stiffness of the second bending portions 330 in two adjacent unit areas.
  • the value obtained by dividing the absolute value by the first stiffness may be 0.05, 0.1, 0.15, 0.2, or any value between 0.05-0.2.
  • the stiffness of the supporting member 300 can be adjusted by providing notches on the supporting member 300 .
  • the support 300 with a notch needs to remove part of the support 300 to form a notch, so that the rigidity of the support 300 can be reduced by providing a notch.
  • Notches may be formed by through holes 361 (Fig. 6) and/or grooves 370 (Fig. 4).
  • the shape of the orthographic projection of the inner wall of the gap on the flexible screen 220 may include, but is not limited to, a circle, an ellipse, a strip, a polygon (eg, a rhombus, a ladder), etc.
  • the supporting member 300 may be provided with a plurality of through holes 361 at intervals, and the through holes 361 penetrate the supporting member 300 along the thickness direction of the supporting member 300 .
  • the stiffness of the supporting member 300 can be adjusted by adjusting the number of through holes 361, the cross-sectional area of a single through hole 361, the spacing between two adjacent through holes 361, etc. The greater the sum of the areas of all the through holes 361 of the supporting member 300 within the unit area, the smaller the stiffness of the supporting member 300 within the unit area.
  • the sum of the areas (cross-sectional areas) of all the through holes 361 of the central portion 331 per unit area may be set smaller than the sum of the areas of all the through holes 361 of the main bending portion 332 per unit area. In this way, the stiffness of the central portion 331 can be made greater than the stiffness of the main bending portion 332 , thereby alleviating the creases of the display module 200 .
  • the principle has been explained and will not be described again.
  • Each through hole group 360 includes a plurality of through holes 361 spaced apart along the second direction Y.
  • the through holes 361 in two adjacent through hole groups 360 are staggered along the second direction Y.
  • at least part of the through-holes 361 in one of the through-hole groups 360 is arranged opposite to the gap in the other through-hole group 360 , so that the two adjacent through-hole groups 360 This gap in can be staggered. Since the gap is a portion where no through hole 361 is provided, its rigidity is relatively high.
  • the cross section of the through hole 361 is a strip shape, that is, the shape of the orthographic projection of the inner wall of the through hole 361 on the flexible screen 220 is a strip shape.
  • the cross section of the through hole 361 refers to the shape of the through hole 361 parallel to The cross section of the plane where the supporting member 300 is located.
  • the through hole 361 may extend along the second direction Y, that is, the length direction of the through hole 361 is consistent with the second direction Y. In this way, the bending performance of the supporting member 300 provided with the through hole 361 can be improved.
  • the through hole 361 may include a first end 3611 and a second end 3612.
  • the first end 3611 and the second end 3612 may be opposite ends of the through hole 361 along the second direction Y.
  • a portion between the first end 3611 and the second end 3612 forms a middle section 3613.
  • the extension lengths of the first end 3611 , the second end 3612 and the middle section 3613 along the first direction X may each be greater than the extension lengths along the first direction X of the remaining portions of the through holes 361 .
  • the middle section 3613 of one through-hole group 360 can be arranged opposite to the gap between the two adjacent through-holes 361 of the other through-hole group 360, so that one of the through-hole groups 360 can
  • the middle section 3613 of the hole group 360 is adjacent to the gap of another through hole group 360.
  • the middle section 3613 can reduce the stiffness of the supporting member 300 at the gap, thereby preventing the supporting member 300 from being too stiff and affecting the supporting member. 300 bending performance.
  • the sum of the cross-sectional areas of all through holes 361 the number of through holes 361 * the cross-sectional area of a single through hole 361 (can be simply referred to as the area).
  • the cross-sectional area of a single through hole 361 may be the same.
  • the distance between two adjacent through holes 361 in the central part 331 W in FIG. 7
  • the number of through holes 361 in the central portion 331 per unit area is smaller than the number of through holes 361 in the main bending portion 332 per unit area, that is, the sum of the cross-sectional areas of all the through holes 361 in the central portion 331 per unit area. It is smaller than the sum of the cross-sectional areas of all the through holes 361 of the main bending portion 332 within the unit area. In this way, the stiffness of the central portion 331 can be made greater than the stiffness of the main bending portion 332 , thereby alleviating the creases of the display module 200 . The principle has been explained and will not be described again.
  • the distance W between two adjacent through holes 361 in the central portion 331 may first increase and then decrease.
  • the stiffness of the central portion 331 may gradually decrease from the middle to both sides. It is possible to avoid local stress concentration between the central portion 331 and the main bending portion 332 and in the central portion 331 due to sudden changes in stiffness, thereby alleviating the creases of the supporting member 300 and preventing the supporting member 300 from breaking. The principle has been explained and will not be repeated.
  • the distance W between two adjacent through holes 361 of the main bending part 332 may gradually decrease. Small.
  • the rigidity of the main bending portion 332 gradually decreases. Local stress concentration due to sudden changes in stiffness between the central portion 331 and the main bending portion 332 and in the main bending portion 332 can be avoided, thereby alleviating the creases of the supporting member 300 and preventing the supporting member 300 from breaking. The principle has been explained and will not be repeated.
  • the distance W between two adjacent through holes 361 of the main bending part 332 can be reduced first. Increase in size later.
  • the stiffness of the main bending portion 332 can gradually increase from the middle to both sides. Local stress concentration due to sudden changes in stiffness between the central portion 331 and the main bending portion 332, between the connecting portion 340 and the main bending portion 332, and in the main bending portion 332 can be avoided, thereby alleviating the creases of the supporting member 300. , to prevent the supporting member 300 from breaking. The principle has been explained and will not be repeated.
  • the distance F between the centers O of any two adjacent through holes 361 can be the same, so that the number of through holes 361 that can be provided in the supporting member 300 per unit area is the same.
  • the cross-sectional area of the single through hole 361 of the central part 331 is smaller than the cross-sectional area of the single through hole 361 of the main bending part 332, so that the sum of the cross-sectional areas of all the through holes 361 of the central part 331 within the unit area is less than unit.
  • the sum of the cross-sectional areas of all the through holes 361 of the main bending portion 332 within the area In this way, the stiffness of the central portion 331 can be made greater than the stiffness of the main bending portion 332 , thereby alleviating the creases of the display module 200 .
  • the principle has been explained and will not be described again.
  • the cross-sectional area of the through hole 361 of the central portion 331 first decreases and then increases along the first direction X.
  • the stiffness of the central portion 331 may gradually decrease from the middle to both sides.
  • the crease of the supporting member 300 can be alleviated and the supporting member 300 can be prevented from breaking. The principle has been explained and will not be repeated.
  • the cross-sectional area of the through hole 361 of the main bending portion 332 gradually increases along the direction from the central portion 331 to the main bending portion 332 .
  • the rigidity of the main bending portion 332 gradually decreases.
  • the crease of the supporting member 300 can be alleviated and the supporting member 300 can be prevented from breaking. The principle has been explained and will not be repeated.
  • the cross-sectional area of the through hole 361 of the main bending portion 332 first increases and then decreases along the direction from the central portion 331 to the main bending portion 332 .
  • the stiffness of the main bending portion 332 can gradually increase from the middle to both sides.
  • the crease of the supporting member 300 can be alleviated and the supporting member 300 can be prevented from breaking. The principle has been explained and will not be repeated.
  • the supporting member 300 may be provided with a groove 370 , and the notch of the groove 370 is located on at least one of two opposite surfaces of the supporting member 300 along the thickness direction.
  • the stiffness of the supporting member 300 can be adjusted by adjusting the groove depth of the groove 370, the cross-sectional area of a single groove 370, the number of grooves 370, the spacing between two adjacent grooves 370, etc.
  • the notch of the groove 370 can be located on the first surface 300a; or, as shown in Figure 13, the notch of the groove 370 can be located on the second surface 300b, which can avoid the impact of the groove 370 on the flexible screen 220.
  • the openings of groove 370 may be located on both the first surface 300a and the second surface 300b.
  • the minimum thickness D (FIG. 12) of the supporting member 300 When the minimum thickness D (FIG. 12) of the supporting member 300 is different at different positions, the part of the supporting part 300 with a larger minimum thickness D has a greater stiffness, and the part with a smaller minimum thickness D has a smaller stiffness. .
  • the minimum thickness D of the central part 331 may be greater than the minimum thickness D of the main bending part 332 , so that the stiffness of the central part 331 is greater than the stiffness of the main bending part 332 , thereby easing the display problem.
  • the principle of the crease of the module 200 has been explained and will not be described again.
  • the minimum thickness D of the central part 331 may be the bottom of the groove 370 The minimum distance between the wall and the second surface 300b.
  • the minimum thickness D of the central portion 331 may be the minimum distance between the bottom wall of the groove 370 and the first surface 300a.
  • both the first surface 300a and the second surface 300b are provided with the notch of the groove 370, as shown in FIG.
  • the notch is located at the orthographic projection of the groove 370 of the first surface 300a on the flexible screen 220 and The orthographic projection of the groove 370 with the notch located on the second surface 300b on the flexible screen 220 at least partially overlaps.
  • the minimum thickness D of the central portion 331 may be the groove bottom wall and the notch of the groove 370 with the notch located on the first surface 300a. The minimum distance between the bottom walls of the groove 370 located on the second surface 300b.
  • the minimum thickness D of the central portion 331 may first increase and then decrease.
  • the stiffness of the central portion 331 may gradually decrease from the middle to both sides. It is possible to avoid local stress concentration between the central portion 331 and the main bending portion 332 and in the central portion 331 due to sudden changes in stiffness, thereby alleviating the creases of the supporting member 300 and preventing the supporting member 300 from breaking. The principle has been explained and will not be repeated.
  • the minimum thickness D of the main bending portion 332 may gradually decrease.
  • the rigidity of the main bending portion 332 gradually decreases. Local stress concentration due to sudden changes in stiffness between the central portion 331 and the main bending portion 332 and in the main bending portion 332 can be avoided, thereby alleviating the creases of the supporting member 300 and preventing the supporting member 300 from breaking. The principle has been explained and will not be repeated.
  • the minimum thickness D of the main bending portion 332 may first decrease and then increase.
  • the stiffness of the main bending portion 332 can gradually increase from the middle to both sides. Local stress concentration due to sudden changes in stiffness between the central portion 331 and the main bending portion 332, between the connecting portion 340 and the main bending portion 332, and in the main bending portion 332 can be avoided, thereby alleviating the creases of the supporting member 300. , to prevent the supporting member 300 from breaking. The principle has been explained and will not be repeated.
  • the first supporting layer 351 can be a complete entire layer structure. 351 can completely cover the flexible screen 220 in the non-bending area 200b and the bending area 200a, and the first supporting layer 351 provides a complete plane.
  • the second supporting layer 352 may include a plurality of sub-supporting layers 3521, and the plurality of sub-supporting layers 3521 are spaced apart along the first direction X (FIG. 5). The area between two adjacent sub-supporting layers 3521 is not provided with a sub-supporting layer 3521 and an opening 354 is formed on the second supporting layer 352.
  • the opening 354 of the second supporting layer 352 forms a groove on the supporting member 300. 370.
  • the stiffness of the supporting member 300 corresponding to the opening 354 is relatively low, and the stiffness of the supporting member 300 at different positions can be adjusted by adjusting the position of each sub-supporting layer 3521.
  • the central part 331 , the connecting part 340 , the first bending part 320 and the fixing part 310 may each be provided with a sub-supporting layer 3521 , and the main bending part 332 may not be provided with a sub-supporting layer 3521 . That is, the opening 354 in the second supporting layer 352 may be located in the main bending part 332.
  • the orthographic projection of the opening 354 on the first supporting layer 351 coincides with the first supporting layer 351 of the main bending part 332.
  • the surface of the second supporting layer 352 of the connecting part 340 facing the central part 331 and the surface of the second supporting layer 352 of the central part 331 facing the connecting part 340 form the groove side walls of the groove 370
  • the main The surface of the fifth connecting layer 355 of the bent portion 332 facing away from the first supporting layer 351 forms the bottom wall of the groove 370 .
  • the stiffness of the main bending portion 332 is made smaller than the stiffness of the central portion 331 , so that the crease of the supporting member 300 can be alleviated. The principle has been explained and will not be repeated.
  • a plurality of sub-supporting layers 3521 are connected to the first supporting layer 351 to form the groove 370 on the supporting member 300.
  • the process is relatively simple. , which is easier to implement and correspondingly lower cost.
  • the thickness of the second supporting layer 352 may be greater than the thickness of the first supporting layer 351 . Since the thickness of the first supporting layer 351 is smaller, the overall bending performance of the first supporting layer 351 is better. The thickness of the second supporting layer 352 is relatively large, and the supporting effect of the second supporting layer 352 is better. When the opening 354 is provided on the second supporting layer 352, the supporting performance and bending performance of the supporting member 300 can be ensured at the same time.
  • the thickness of the second supporting layer 352 of the central part 331 can be smaller than the thickness of the second supporting layer 352 of the fixing part 310, which can ensure the bending performance of the central part 331 and the supporting performance of the fixing part 310.
  • the connecting portion 340 , the first bending portion 320 , and the second supporting layer 352 of the fixing portion 310 can be integrated into one piece, so that the connecting portion 340 , the first bending portion 320 , and the second supporting member 300 of the fixing portion 310 can be lowered. difficulty of preparation.
  • Example 1 the stiffness of the supporting member 300 in the bending area 200a is smaller than the stiffness in the non-bending area 200b.
  • the central portion 331 and the main bending portion 332 , the connecting part 340 and the first bending part 320 have the same stiffness.
  • Example 2 the stiffnesses of the main bending part 332 , the central part 331 , the first bending part 320 and the connecting part 340 increase in sequence, and the stiffness of the connecting part 340 is equal to the stiffness of the fixed part 310 .
  • S1 in FIG. 16 shows a graph of the crease depth in Example 1.
  • the crease of the display module 200 in the bending area 200a of Example 1 is "V" shaped, and the crease depth is about 0.13 mm.
  • S2 in Figure 16 shows a graph of the crease depth in Example 2.
  • the crease of the display module 200 in the bending area 200a of Example 2 is “W” shaped, and the crease is relatively gentle, and the depth of the crease is approximately 0.05mm. Therefore, by rationally designing the stiffness at different positions of the supporting member 300 in the bending area 200a and increasing the stiffness of the central portion 331 and the first bending portion 320, the creases of the display module 200 can be alleviated.
  • the display device 100 provided in the embodiment of the present application is described below.
  • This embodiment provides a display device 100, which may include a display module 200.
  • the display device 100 can be an electronic paper, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a super personal computer, a navigator, or any other mobile or fixed terminal with a display module 200 .
  • the display device 100 may include a housing.
  • the housing may include a first housing 111 and a second housing 112 .
  • the first housing 111 and the second housing 112 are rotationally connected to each other.
  • the folding function of the display device 100 is implemented.
  • the display device 100 may further include a first support member 121 and a second support member 122.
  • the first supporting member 121 and the second supporting member 122 are both located on the side of the supporting member 300 facing away from the flexible screen 220 .
  • the first support member 121 may be provided corresponding to the fixing part 310, and a fixing part 310 is connected to a first support member 121.
  • the second supporting member 122 may be provided corresponding to the connecting part 340, and one connecting part 340 is connected to one second supporting member 122.
  • the two first supporting members 121 are fixed on the first housing 111 and the second housing 112 respectively, and the adjacent first supporting members 121 and the second supporting members 122 are rotationally connected.
  • the first supporting member 121 and the second supporting member 122 may support the display module 200 .
  • the first support member 121 and the second support member 122 always provide planar support for the fixing part 310 and the connecting part 340 , so that the fixing part 310 and the connecting part 340 can be in a planar state.
  • the two first supports 121 can be rotationally connected through a hinge assembly (not shown in the figure).
  • a shaft cover 113 is provided on the side of the hinge assembly away from the flexible screen 220. The shaft cover 113 protects the hinge assembly.

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Abstract

一种显示模组及显示装置，显示模组包括层叠设置的柔性屏（220）和承托件（300），承托件（300）位于柔性屏（220）的背光侧；承托件（300）包括沿第一方向（X）排布的固定部（310）、第一弯折部（320）和第二弯折部（330），第一弯折部（320）位于固定部（310）和第二弯折部（330）之间，第二弯折部（330）包括中心部（331）和位于中心部（331）沿第一方向（X）相对两侧的主弯折部（332），中心部（331）的刚度大于主弯折部（332）的刚度。由于中心部（331）的刚度较大，中心部（331）在弯折时产生的形变较小，中心部（331）的弯折半径较大，从而可以缓解中心部（331）的折痕，延长显示模组和显示装置的整体寿命。

Description

显示模组及显示装置
本申请要求于2022年08月31日提交中国专利局、申请号为202211055975.5、申请名称为“显示模组及显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示技术领域，尤其涉及一种显示模组及显示装置。
背景技术
柔性显示面板具有折叠、大角度弯曲、卷曲等特殊产品形态，从而得到越来越多的应用。
例如，折叠式显示面板，在显示面板展平状态下，可以获得较大的显示面积；在显示面板折叠状态下，可以具有较小的收纳体积，便于携带，从而得到广泛的关注。相关技术中，显示模组可以包括显示面板和承托件，承托件位于显示面板的背光侧，以对显示面板形成支撑。
然而，上述显示模组的折痕较为严重。
发明内容
鉴于上述至少一个技术问题，本申请实施例提供一种显示模组及显示装置，能够改善显示模组的折痕，从而延长显示模组和显示装置的整体寿命。
为了实现上述目的，本申请实施例提供如下技术方案：
本申请实施例的第一方面提供一种显示模组，包括层叠设置的柔性屏和承托件，承托件位于柔性屏的背光侧；承托件包括沿第一方向排布的固定部、第一弯折部和第二弯折部，第一弯折部位于固定部和第二弯折部之间，第二弯折部包括中心部和位于中心部沿第一方向相对两侧的主弯折部，中心部的刚度大于主弯折部的刚度。
本申请实施例的提供的显示模组，显示模组可以包括层叠设置的柔性屏和承托件，承托件位于柔性屏的背光侧，承托件可对柔性屏形成一定支撑。承托件可以包括沿第一方向排布的固定部、第一弯折部和第二弯折部，第一弯折部位于固定部和第二弯折部之间。其中，第二弯折部可以包括中心部和位于中心部沿第一方向相对两侧的主弯折部，中心部的刚度大于主弯折部的刚度。由于中心部的刚度较大，中心部在弯折时产生的形变较小，中心部的弯折半径较大，从而可以缓解中心部的折痕，延长显示模组和显示装置的整体寿命。主弯折部的刚度较小，主弯折部较易发生弯折，第二弯折部中的应力将主要分摊在中心部两侧的主弯折部上，而非中心部上，从而可以改变弯折区的承托件的弯折形状，避免应力集中在中心部而产生严重折痕。
在一种可能的实施方式中，第一弯折部的刚度大于中心部的刚度；
可以实现的是，固定部的刚度大于第一弯折部的刚度；
可以实现的是，中心部的刚度沿第一方向先增大后减小；
可以实现的是，主弯折部的刚度沿中心部至主弯折部的方向逐渐减小；或者，主弯折部的刚度沿中心部至主弯折部的方向先减小后增大；
可以实现的是，第二弯折部的相邻两个单位面积内的刚度平均值分别为第一刚度和第二刚度，第一刚度与第二刚度的差值的绝对值除以第一刚度的范围为0.05-0.2；
可以实现的是，沿第一方向，中心部的延伸长度为1mm-2mm；
可以实现的是，承托件为整体式结构。
这样，第一弯折部在弯折时产生的形变较小，第一弯折部的弯折半径较大，从而可以缓解第一弯折部的折痕。
在一种可能的实施方式中，承托件还包括连接部，连接部位于第二弯折部与第一弯折部之间，连接部的刚度大于第一弯折部的刚度；
可以实现的是，连接部的刚度等于固定部的刚度。
这样，由于固定部和连接部刚度均较大，固定部和连接部不易被弯折而保持平面状态。在显示模组处于展平状态时，固定部和连接部对柔性屏的支撑效果较好。
在一种可能的实施方式中，承托件上间隔设置有多个通孔，通孔沿承托件的厚度方向贯穿承托件，单位面积内的中心部的所有通孔的面积之和小于单位面积内的主弯折部的所有通孔的面积之和；
可以实现的是，通孔的横截面为条形，通孔沿第二方向延伸，第二方向与第一方向垂直；
可以实现的是，沿第二方向，在同一通孔中，通孔包括第一端和第二端以及位于第一端和第二端之间的中段，第一端、第二端以及中段的沿第一方向的延伸长度均大于通孔的其余部分的沿第一方向的延伸长度；
可以实现的是，沿第二方向间隔排布的多个通孔构成通孔组，通孔组有多个，多个通孔组沿第一方向间隔排布，相邻两个通孔组中的通孔沿第二方向错位排布。
这样，可以实现中心部的刚度大于主弯折部的刚度。
在一种可能的实施方式中，各通孔的面积均相同，中心部的相邻两个通孔的间距大于主弯折部的相邻两个通孔的间距；
可以实现的是，中心部的相邻两个通孔的间距沿第一方向先增大后减小；
可以实现的是，主弯折部的相邻两个通孔的间距沿中心部至主弯折部的方向逐渐减小；或，主弯折部的相邻两个通孔的间距沿中心部至主弯折部的方向先减小后增大。
在一种可能的实施方式中，任意相邻两个通孔的中心的间距均相同，中心部的通孔的面积小于主弯折部的通孔的面积；
可以实现的是，中心部的通孔的面积沿第一方向先减小后增大；
可以实现的是，主弯折部的通孔的面积沿中心部至主弯折部的方向逐渐增大；或者，主弯折部的通孔的面积沿中心部至主弯折部的方向先增大后减小。
这样，通孔的设置方式较为简单。
在一种可能的实施方式中，承托件上设置有凹槽，凹槽的槽口位于承托件的沿厚度方向的相对两个表面的至少一者上。
这样，凹槽的设置方式较多，能够适用较多场景。
在一种可能的实施方式中，中心部的最小厚度大于主弯折部的最小厚度；
可以实现的是，中心部的最小厚度沿第一方向先增大后减小；
可以实现的是，主弯折部的最小厚度沿中心部至主弯折部的方向逐渐减小，或者， 主弯折部的最小厚度沿中心部至主弯折部的方向先减小后增大。
这样，可以通过最小厚度来调整承托件的刚度。
在一种可能的实施方式中，承托件包括依次层叠设置的第一承托层、连接层和第二承托层，第二承托层中具有开口，开口沿承托件的厚度方向贯穿第二承托层，开口位于主弯折部；
可以实现的是，承托件还包括连接部，连接部位于第二弯折部与第一弯折部之间，连接部的第二承托层、中心部的第二承托层以及主弯折部的连接层围设形成凹槽。
这样，凹槽的形成工艺较为简单。
在一种可能的实施方式中，第二承托层的厚度大于第一承托层的厚度；
可以实现的是，中心部的第二承托层的厚度小于固定部的第二承托层的厚度。
这样，可以保证承托件的支撑性能以及弯折性能。
本申请实施例的第一方面提供一种显示装置，包括第一支撑件、第二支撑件和上述第一方面中的显示模组，第一支撑件和第二支撑件均位于显示模组的承托件背离显示模组的柔性屏的一侧，第一支撑件与承托件的固定部对应设置，第二支撑件与承托件的连接部对应设置。
本申请实施例的提供的显示装置，显示装置包括显示模组，显示模组可以包括层叠设置的柔性屏和承托件，承托件位于柔性屏的背光侧，承托件可对柔性屏形成一定支撑。承托件可以包括沿第一方向排布的固定部、第一弯折部和第二弯折部，第一弯折部位于固定部和第二弯折部之间。其中，第二弯折部可以包括中心部和位于中心部沿第一方向相对两侧的主弯折部，中心部的刚度大于主弯折部的刚度。由于中心部的刚度较大，中心部在弯折时产生的形变较小，中心部的弯折半径较大，从而可以缓解中心部的折痕，延长显示模组和显示装置的整体寿命。主弯折部的刚度较小，主弯折部较易发生弯折，第二弯折部中的应力将主要分摊在中心部两侧的主弯折部上，而非中心部上，从而可以改变弯折区的承托件的弯折形状，避免应力集中在中心部而产生严重折痕。
本申请的构造以及它的其他发明目的及有益效果将会通过结合附图而对优选实施例的描述而更加明显易懂。
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，下面将对实施例或现有技术描述中所需要使用的附图作以简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，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为一种承托件处于折叠状态的结构示意图；
图2a为本申请实施例提供的显示模组的展平状态结构示意图；
图2b为本申请实施例提供的显示模组的展平状态另一结构示意图；
图3为本申请实施例提供的显示模组的折叠状态的结构示意图；
图4为本申请实施例提供的承托件的结构示意图；
图5为本申请实施例提供的承托件的俯视图；
图6为本申请实施例提供的承托件上设置有通孔的结构示意图；
图7为本申请实施例提供的第二弯折部的通孔分布的结构示意图；
图8为本申请实施例提供的第二弯折部的通孔分布的另一结构示意图；
图9为本申请实施例提供的主弯折部的通孔分布的结构示意图；
图10为本申请实施例提供的主弯折部的通孔分布的另一结构示意图；
图11为本申请实施例提供的第二弯折部的通孔分布的另一结构示意图；
图12为本申请实施例提供的凹槽的槽口位于第一表面的结构示意图；
图13为本申请实施例提供的凹槽的槽口位于第二表面的结构示意图；
图14为本申请实施例提供的凹槽的槽口位于第一表面和第二表面的结构示意图；
图15为本申请实施例提供的承托件为多层堆叠结构的结构示意图；
图16为示例一和示例二的显示模组的折痕深度的曲线图；
图17为本申请实施例提供的显示装置的结构示意图；
图18为本申请实施例提供的显示装置的展平状态结构示意图；
图19为本申请实施例提供的显示装置的折叠状态结构示意图。
附图标记说明：
100：显示装置；             111：第一壳体；
112：第二壳体；             113：轴盖；
121：第一支撑件；           122：第二支撑件；
200：显示模组；             200a：弯折区；
200b：非弯折区；            201b：第一非弯折区；
202b：第二非弯折区；        210：保护层；
220：柔性屏；               221：缓冲层；
222：发光层；               223：滤光层；
224：盖板；                 2253：第三连接层；
2254：第四连接层；          300/300’：承托件；
300a：第一表面；            300b：第二表面；
310：固定部；               311：第一固定部；
312：第二固定部；           320：第一弯折部；
321：第一子弯折部；         322：第二子弯折部；
330：第二弯折部；           331：中心部；
332：主弯折部；             3321：第一主弯折部；
3322：第二主弯折部；        340：连接部；
341：第一连接部；           342：第二连接部；
351：第一承托层；           352：第二承托层；
3521：子承托层；            354：开口；
355：第五连接层；           360：通孔组；
361：通孔；                 3611：第一端；
3612：第二端；              3613：中段；
370：凹槽。
具体实施方式
经发明人研究发现，相关技术中，显示模组可以包括柔性屏和承托件，承托件位于柔性屏的背光侧，承托件可对柔性屏形成一定支撑。另外，承托件在外力作用下，可带动柔性屏弯折和展平。
然而，显示模组在弯折过程中，位于弯折区的显示模组中的各个膜层受外力作用产生形变，而各个膜层的材料形变恢复能力有限。当形变超过材料的弹性极限时，材料产生的形变为不可逆的塑性形变；在外力撤去后，形变无法完全消除，材料不能完全恢复原始形状。从而在弯折区的显示模组产生折痕，进而影响显示模组和显示装置的整体寿命。
其中，如图1所示，以承托件300’为例，位于弯折区的承托件300’形成弯曲部A，弯曲部A包括靠近弯曲部A中心位置处的中心弯曲部T，越靠近中心弯曲部T，承托件300’的弯折半径越小。中心弯曲部T的弯折半径比弯曲部A的其余部分的弯折半径小，使得中心弯曲部T的折痕较为严重，从而导致显示模组的折痕较为严重(例如，中心弯曲部T的折痕呈现“V”字形)。
基于上述的至少一个技术问题，本申请实施例提供一种显示模组及显示装置，显示模组可以包括层叠设置的柔性屏和承托件，承托件位于柔性屏的背光侧，承托件可对柔性屏形成一定支撑。承托件可以包括沿第一方向排布的固定部、第一弯折部和第二弯折部，第一弯折部位于固定部和第二弯折部之间。其中，第二弯折部可以包括中心部和位于中心部沿第一方向相对两侧的主弯折部，中心部的刚度大于主弯折部的刚度。由于中心部的刚度较大，中心部在弯折时产生的形变较小，中心部的弯折半径较大，从而可以缓解中心部的折痕，延长显示模组和显示装置的整体寿命。主弯折部的刚度较小，主弯折部较易发生弯折，第二弯折部中的应力将主要分摊在中心部两侧的主弯折部上，而非中心部上，从而可以改变弯折区的承托件的弯折形状，避免应力集中在中心部而产生严重折痕。
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
以下将结合图2a-图19对本申请实施例提供的显示模组200进行说明。
如图2a所示，显示模组200可以包括柔性屏220，柔性屏220可以为有机发光二极管(Organic Light-Emitting Diode，简称为OLED)显示屏，或，微发光二极管(Micro Light Emitting Diode，简称为Micro LED或μLED)显示屏。
柔性屏220可以包括相对设置的出光侧和背光侧，出光侧可以用于显示画面，背光侧为柔性屏220的与出光侧相背设置的另一侧。图2a中所示的柔性屏220的上侧即为出光侧，图2a中所示的柔性屏220的下侧即为背光侧。
显示模组200可以包括承托件300，承托件300位于柔性屏220的背光侧，承托件300用于对柔性屏220形成一定支撑。当柔性屏220处展平状态时，承托件300可以提升柔性屏220的平面度，从而有效提升柔性屏220的显示效果。当柔性屏220处于折叠状态时，承托件300可以通过自身的结构设计来控制柔性屏220的折叠形态，从而可以提升用户的使用体验。
如图5所示，显示模组200可以包括第一方向X，第一方向X可以为显示模组200的宽度方向；显示模组200可以包括第二方向Y，第二方向Y可以为显示模组200的长度方 向；显示模组200可以包括第三方向，第三方向可以为显示模组200的厚度方向。本申请实施例中的长度、宽度和厚度等，仅仅是为了描述方便，并不意味着对尺寸的任何限制。例如，宽度可以大于、等于或小于长度。本案中第一方向X可以理解为，在产品展开时对应的是直线走向，在产品折叠时对应的为弯曲走向的方向。
如图2a所示，显示模组200可以包括弯折区200a和非弯折区200b，弯折区200a和非弯折区200b相邻排布。例如，弯折区200a和非弯折区200b可以沿第一方向X(图5)相邻设置，第一方向X为弯折区200a和非弯折区200b的排布方向。弯折区200a和非弯折区200b的数量均为至少一个，一个弯折区200a和一个非弯折区200b交替设置。例如，弯折区200a的数量可以为1个、2个、3个或大于3个的任意数量。非弯折区200b的数量可以为1个、2个、3个或大于3个的任意数量。
本申请实施例以弯折区200a的数量为一个，非弯折区200b的数量为两个，两个非弯折区200b通过弯折区200a连接为例进行说明。
如图2b所示，两个非弯折区200b可以包括第一非弯折区201b和第二非弯折区202b，弯折区200a位于第一非弯折区201b和第二非弯折区202b之间。位于弯折区200a的显示模组200可以被弯折和展平，从而实现显示模组200的折叠和展平。
需要说明的是，显示模组200可以包括展平状态、折叠状态以及两者之间的中间状态，显示模组200所处的状态，也是柔性屏220、承托件300和显示装置100(图17)所处的状态。承托件300与柔性屏220连接后，用户通过承托件300向柔性屏220施力，承托件300可以带动柔性屏220在展平状态和折叠状态之间切换。
如图2b所示，展平状态是指显示模组200的各个部分分别大致处于同一平面的状态。此时，第一非弯折区201b、第二非弯折区202b和弯折区200a大致处于同一平面上，第一非弯折区201b和第二非弯折区202b之间的夹角为大致呈180度。在展平状态下，显示模组200的显示面积较大，以保证较好用户体验。
如图2b和图3所示，折叠状态是指显示模组200的弯折区200a被弯折，第一非弯折区201b和第二非弯折区202b的显示模组200在显示模组200的厚度方向上至少部分重叠，第一非弯折区201b和第二非弯折区202b之间的夹角大致为0度。在折叠状态下，显示模组200以及具有该显示模组200的显示装置100的体积较小，方便显示装置100的收纳和携带。
一些实施例中，显示装置100可以为内折叠显示装置，即，当显示装置100处于折叠状态时，被折叠的柔性屏220位于承托件300的内侧，承托件300可以保护柔性屏220。此时，第一非弯折区201b和第二非弯折区202b的柔性屏220之间相向设置。
一些实施例中，显示装置100可以为外折叠显示装置，即，当显示装置100处于折叠状态时，被折叠的柔性屏220位于承托件300的外侧，柔性屏220能够在折叠状态实现显示功能，以满足不同的显示场景需求。此时，第一非弯折区201b和第二非弯折区202b的柔性屏220之间相背设置。
以下对本申请实施例提供的柔性屏220进行说明。
如图2b所示，承托件300与柔性屏220之间可以设置有保护层210，保护层210可以用于保护柔性屏220。其中，保护层210与承托件300之间可以设置有第一连接层(图中未示出)，保护层210与柔性屏220之间可以设置有第二连接层，以使保护层210分别与承托件300和柔性屏220稳定连接。例如，连接层(第一连接层和/或第二连接层)可以由光学透明粘合剂、光学透明树脂或压敏粘合剂等形成。
柔性屏220可以包括衬底以及位于衬底上的发光层222。衬底可为后续设置的其余结构层提供支撑。衬底可以为柔性衬底。衬底与发光层222之间设置有缓冲层221，缓冲层221可以阻挡水、氧渗透穿过衬底而进入缓冲层221上的结构层，以免造成腐蚀。
发光层222可以包括依次层叠设置的阳极层、像素层和阴极层，阳极层位于阴极层的朝向衬底的一侧。阳极层可以为像素电极，阴极层可以为公共电极。
柔性屏220可以包括滤光层223，滤光层223位于发光层222背离衬底的一侧，滤光层223可以用于降低环境光的反射，从而改善柔性屏220的显示效果。例如，滤光层223可以是偏光片。
柔性屏220可以包括盖板224，盖板224位于滤光层223的背离衬底的一侧，盖板224用于保护柔性屏220，以避免用户使用柔性屏220时刮伤柔性屏220。例如，盖板224与滤光层223之间可以设置有第三连接层2253，第三连接层2253用于连接盖板224与滤光层223；另外，第三连接层2253还可以用于提供平坦的表面。滤光层223与发光层222之间也可以设置有第四连接层2254。
以下对本申请实施例提供的承托件300进行说明。
如图2a所示，承托件300可以包括沿厚度方向相对设置的第一表面300a和第二表面300b，第一表面300a为承托件300的靠近柔性屏220一侧的面，第二表面300b为承托件300的背离柔性屏220一侧的面。例如，承托件300的材料可以包括不锈钢、钛合金、镁铝合金等金属材料。或者，承托件300的材料还可以包括玻璃、塑料等非金属材料。
一些示例中，承托件300可以为一体结构，承托件300的所有部分为整体结构，从而使得承托件300的整体结构稳定性较高。另一些示例中，如图4所示，承托件300可以为多层的堆叠结构，承托件300可以包括层叠设置的第一承托层351和第二承托层352，第一承托层351和第二承托层352之间通过第五连接层355连接。即承托件300可以包括依次层叠设置的第一承托层351、第五连接层355和第二承托层352。其中，第一承托层351可以位于第二承托层352朝向柔性屏220的一侧，或者，第一承托层351可以位于第二承托层352背离柔性屏220的一侧。本申请实施例以第一承托层351位于第二承托层352朝向柔性屏220的一侧为例进行说明。
其中，显示模组200中的各个连接层，即第一连接层、第二连接层、第三连接层2253、第四连接层2254以及第五连接层355中的任意两个连接层的材料、厚度等参数中的任意一项可以相同，也可以不同。
如图3和图5所示，承托件300可以包括固定部310，固定部310可以位于非弯折区200b中(图5仅示出了部分非弯折区200b)，位于第一非弯折区201b中的固定部310可以为第一固定部311，位于第二非弯折区202b中的固定部310可以为第二固定部312。承托件300还包括第二弯折部330，第二弯折部330位于弯折区200a中。固定部310和第二弯折部330沿第一方向X排布。第二弯折部330可以包括中心部331和位于中心部331沿第一方向X相对两侧的主弯折部332。两个主弯折部332之间设置有中心部331，主弯折部332位于固定部310和中心部331之间。第一固定部311和中心部331之间的主弯折部332为第一主弯折部3321，第二固定部312和中心部331之间的主弯折部332为第二主弯折部3322。
示例性的，沿第一方向X，中心部331的延伸长度的范围可以为1mm-2mm。可以避免中心部331的延伸长度过小，从而可以避免中心部331的弯折半径过小。还可以避免中心部331的延伸长度过大，从而可以避免中心部331对显示装置100的尺寸造成较大影响。例 如，中心部331的延伸长度可以为1mm、1.2mm、1.4mm、1.6mm、1.8mm、2mm或位于1mm-2mm之间的任意数值。
如图3所示，承托件300还可以包括第一弯折部320，第一弯折部320位于第二弯折部330与固定部310之间。第二弯折部330沿第一方向X(图5)的相对两侧均设置有第一弯折部320。另外，承托件300还可以包括连接部340，连接部340位于第二弯折部330与第一弯折部320之间。如图5所示，位于第一固定部311和第二弯折部330之间的第一弯折部320、连接部340分别为第一子弯折部321、第一连接部341，位于第二固定部312和第二弯折部330之间的第一弯折部320、连接部340分别为第二子弯折部322、第二连接部342。即承托件300沿第一方向X依次排布有第一固定部311、第一子弯折部321、第一连接部341、第一主弯折部3321、中心部331、第二主弯折部3322、第二连接部342、第二子弯折部322和第二固定部312。
例如，显示模组200可以呈水滴形弯折，使得两个非弯折区200b的柔性屏220之间的距离较近，可以减少外部灰尘进入到该两个柔性屏220之间，从而保护柔性屏220。在显示装置100为内折叠显示装置时，第二弯折部330朝内弯曲，受到挤压应力；第一弯折部320朝外弯曲，受到拉伸应力。在显示装置100为外折叠显示装置时，第二弯折部330朝外弯曲，受到拉伸应力；第一弯折部320朝内弯曲，受到挤压应力。
以下对本申请实施例提供的承托件300的刚度进行说明。
一些实施例中，中心部331的刚度可以大于主弯折部332的刚度。中心部331的刚度较大，中心部331在弯折时产生的形变较小，中心部331的弯折半径较大，中心部331在弯折时较为平坦，从而可以缓解中心部331的折痕，使得中心部331的折痕较为平坦，可以缓解显示模组200的折痕，从而延长显示模组200和显示装置100的整体寿命。主弯折部332的刚度较小，主弯折部332较易发生弯折，主弯折部332的弯折半径将小于中心部331的弯折半径，第二弯折部330中的应力将主要分摊在中心部331两侧的主弯折部332上，而非中心部331上，从而可以改变弯折区200a的承托件300的弯折形状，避免应力集中在中心部331而产生严重折痕,以缓解显示模组200的折痕。
一些实施例中，中心部331的刚度可以小于第一弯折部320的刚度，第一弯折部320的刚度较中心部331大，第一弯折部320在弯折时产生的形变较小，第一弯折部320的弯折半径较大，从而可以缓解第一弯折部320的折痕，使得第一弯折部320的折痕较为平坦，以缓解显示模组200的折痕，延长显示模组200和显示装置100的整体寿命。
一些实施例中，固定部310的刚度可以大于第一弯折部320的刚度。另外，连接部340的刚度可以大于第一弯折部320的刚度。当显示模组200处于折叠状态时，由于固定部310和连接部340的刚度均较大，固定部310和连接部340不易被弯折而保持平面状态。在显示模组200处于展平状态时，固定部310和连接部340对柔性屏220的支撑效果较好。例如，连接部340的刚度可以等于固定部310的刚度，从而可以简化固定部310和连接部340的制备难度。
其中，刚度是指结构在受力时抵抗弹性变形的能力，是结构弹性变形难易程度的表征。刚度越大，使其发生形变的应力越大。刚度越小，使其发生形变的应力越小，其弯折性能越好。
以下对本申请实施例提供的第二弯折部330的刚度的变化趋势进行说明。
一些实施例中，沿第一方向X，中心部331的刚度可以先增大后减小，即中心部331 的刚度可以从中部向两侧逐渐减小。这样，中心部331的刚度呈中间大两侧小的分布形式，中心部331沿第一方向X的相对两侧的刚度较小，其与主弯折部332的刚度较为接近，可以避免中心部331与主弯折部332之间，因为刚度突变产生局部应力集中，另外，还可以避免在中心部331中因为刚度突变产生局部应力集中，从而可以缓解承托件300的折痕，避免应力集中导致承托件300断裂。
一些实施例中，沿中心部331至主弯折部332的方向，主弯折部332的刚度可以逐渐减小。这样，主弯折部332的靠近中心部331一侧的刚度较大，其与中心部331的刚度较为接近，可以避免中心部331与主弯折部332之间，因为刚度突变产生局部应力集中，另外，还可以避免在主弯折部332中因为刚度突变产生局部应力集中，从而可以缓解承托件300的折痕，避免应力集中导致承托件300断裂。
一些实施例中，沿中心部331至主弯折部332的方向，主弯折部332的刚度可以先减小后增大，即主弯折部332的刚度可以从中部向两侧逐渐增大。这样，主弯折部332的刚度呈中间小两侧大的分布形式，主弯折部332沿第一方向X的相对两侧的刚度较大，主弯折部332靠近中心部331的一侧的刚度与中心部331之间的刚度较为接近，可以避免中心部331与主弯折部332之间，因为刚度突变产生局部应力集中。主弯折部332靠近连接部340一侧的刚度与连接部340的刚度较为接近，可以避免连接部340与主弯折部332之间，因为刚度突变产生局部应力集中。另外，还可以避免在主弯折部332中因为刚度突变产生局部应力集中，从而可以缓解承托件300的折痕，避免应力集中导致承托件300断裂。
示例性的，第二弯折部330的相邻两个单位面积内的刚度平均值可以分别为第一刚度和第二刚度，第一刚度与第二刚度的差值的绝对值除以第一刚度所得的值的范围可以为0.05-0.2。可以避免相邻两个单位面积内的第二弯折部330的刚度差距过小，从而可以避免中心部331和主弯折部332的刚度差距过小而无法缓解折痕。还可以避免相邻两个单位面积内的第二弯折部330的刚度差距过大，从而可以避免相邻两个单位面积内的第二弯折部330因为刚度突变产生应力集中。例如，该绝对值除以第一刚度所得的值的大小可以为0.05、0.1、0.15、0.2或0.05-0.2之间的任意数值。
可以通过在承托件300上设置缺口来调整承托件300的刚度。与未设置缺口的承托件300相比，设置有缺口的承托件300需要去除部分承托件300以形成缺口，从而可以通过设置缺口来降低承托件300的刚度。缺口可以由通孔361(图6)和/或凹槽370(图4)形成。例如，缺口内壁在柔性屏220上的正投影的形状可以包括但不限于为圆形、椭圆形、条形、多边形(例如，菱形、梯行)等。
以下对本申请实施例提供的承托件300上设置有通孔361进行说明。
如图6所示，承托件300上可以间隔设置有多个通孔361，通孔361沿承托件300的厚度方向贯穿承托件300。可以通过调整通孔361的数量、单个通孔361的横截面面积、相邻两个通孔361之间的间距等方式来调整承托件300的刚度。单位面积内的承托件300的所有通孔361的面积之和越大，单位面积内的承托件300的刚度越小。可以将单位面积内的中心部331的所有通孔361的面积(横截面面积)之和设置得小于单位面积内的主弯折部332的所有通孔361的面积之和。这样，可以使得中心部331的刚度大于主弯折部332的刚度，从而可以缓解显示模组200的折痕，其原理已经阐述，不再赘述。
如图5所示，多个通孔361沿第一方向X间隔排布成多个通孔组360(即图5中的同一列的多个通孔361形成一个通孔组360)，且每个通孔组360中包括沿第二方向Y间隔排布的多个通孔361。相邻两个通孔组360中的通孔361沿第二方向Y错位排布。在同一 通孔组360中，相邻两个通孔361之间具有间隙。在相邻两个通孔组360中，其中一个通孔组360中的通孔361的至少部分与另一个通孔组360中的间隙相对设置，从而可以使得相邻的两个通孔组360中的该间隙可以错开分布。由于该间隙处为未设置通孔361的部分，其刚度较高。间隙错开分布时，可以避免间隙集中而影响设置有该多个通孔组360的承托件300的弯折性能。另外，可以避免在承托件300中产生应力集中，从而可以减轻多次弯折导致的疲劳损伤，以延长产品寿命。
如图7所示，通孔361的横截面为条形，即通孔361的内壁在柔性屏220上的正投影的形状为条形，通孔361的横截面是指通孔361的平行于承托件300所在平面的截面。通孔361可以沿第二方向Y延伸，即通孔361的长度方向与第二方向Y一致。这样，可以提高设置有通孔361的承托件300的弯折性能。
沿第二方向Y，通孔361可以包括第一端3611和第二端3612，第一端3611和第二端3612可以为通孔361沿第二方向Y的相对两端。第一端3611和第二端3612之间的一部分形成中段3613。第一端3611、第二端3612以及中段3613的沿第一方向X的延伸长度可以均大于其余部分的通孔361的沿第一方向X的延伸长度。沿第二方向Y，相邻的两个通孔361之间具有间隙，第一端3611和第二端3612与间隙邻接设置。将第一端3611和第二端3612的沿第一方向X的延伸长度设置的较大，可以降低间隙处的承托件300的刚度，从而避免间隙处的承托件300的刚度过大而影响承托件300的弯折性能。
其中，在相邻两个通孔组360中，其中一个通孔组360的中段3613可以与另一个通孔组360的相邻两个通孔361之间的间隙相对设置，从而使得其中一个通孔组360的中段3613邻接另一个通孔组360的间隙，该中段3613可以降低该间隙处的承托件300的刚度，从而避免间隙处的承托件300的刚度过大而影响承托件300的弯折性能。
可以理解的是，在单位面积的承托件300内，所有通孔361的横截面面积之和＝通孔361的数量*单个通孔361的横截面面积(可简称为面积)。
第一种实施方式中，单个通孔361的横截面面积可以相同，通孔361的数量越少，所有通孔361的横截面面积之和越小，承托件300的刚度越大。当每个通孔361的横截面面积均相同时，中心部331的相邻两个通孔361的间距(图7中的W)可以大于主弯折部332的相邻两个通孔361的间距。从而使得单位面积的中心部331中的通孔361数量小于单位面积内的主弯折部332的通孔361数量，即单位面积内的中心部331中的所有通孔361的横截面面积之和小于单位面积内的主弯折部332的所有通孔361的横截面面积之和。这样，可以使得中心部331的刚度大于主弯折部332的刚度，从而可以缓解显示模组200的折痕，其原理已经阐述，不再赘述。
示例性的，如图7和图8所示，沿第一方向X，中心部331的相邻两个通孔361的间距W可以先增大后减小。这样，沿第一方向X，中心部331的刚度可以从中部向两侧逐渐减小。可以避免中心部331与主弯折部332之间，以及中心部331中因为刚度突变产生局部应力集中，从而可以缓解承托件300的折痕，避免承托件300断裂。其原理已经阐述，不再赘述。
示例性的，如图9所示，沿中心部331至主弯折部332的方向(图9中的方向C)，主弯折部332的相邻两个通孔361的间距W可以逐渐减小。这样，沿中心部331至主弯折部332方向，主弯折部332的刚度逐渐减小。可以避免中心部331与主弯折部332之间以及主弯折部332中因为刚度突变产生局部应力集中，从而可以缓解承托件300的折痕，避免承托件300断裂。其原理已经阐述，不再赘述。
示例性的，如图10所示，沿中心部331至主弯折部332的方向(图10中的方向C)，主弯折部332的相邻两个通孔361的间距W可以先减小后增大。这样，沿第一方向X，主弯折部332的刚度可以从中部向两侧逐渐增大。可以避免中心部331与主弯折部332之间、连接部340与主弯折部332之间以及主弯折部332中因为刚度突变产生局部应力集中，从而可以缓解承托件300的折痕，避免承托件300断裂。其原理已经阐述，不再赘述。
第二种实施方式中，如图11所示，任意相邻两个通孔361的中心O的间距F均可以相同，使得单位面积内的承托件300中可以设置的通孔361数量相同，使得多个通孔361的排布较为规律。中心部331的单个通孔361的横截面面积小于主弯折部332的单个通孔361的横截面面积，从而使得单位面积内的中心部331的所有通孔361的横截面面积之和小于单位面积内的主弯折部332的所有通孔361的横截面面积之和。这样，可以使得中心部331的刚度大于主弯折部332的刚度，从而可以缓解显示模组200的折痕，其原理已经阐述，不再赘述。
示例性的，中心部331的通孔361的横截面面积沿第一方向X先减小后增大。这样，沿第一方向X，中心部331的刚度可以从中部向两侧逐渐减小。可以缓解承托件300的折痕，避免承托件300断裂。其原理已经阐述，不再赘述。
示例性的，主弯折部332的通孔361的横截面面积沿中心部331至主弯折部332的方向逐渐增大。这样，沿中心部331至主弯折部332方向，主弯折部332的刚度逐渐减小。可以缓解承托件300的折痕，避免承托件300断裂。其原理已经阐述，不再赘述。
示例性的，主弯折部332的通孔361的横截面面积沿中心部331至主弯折部332的方向先增大后减小。这样，沿第一方向X，主弯折部332的刚度可以从中部向两侧逐渐增大。可以缓解承托件300的折痕，避免承托件300断裂。其原理已经阐述，不再赘述。
以下对本申请实施例提供的承托件300上设置有凹槽370进行说明。
如图12-图14所示，承托件300上可以设置有凹槽370，凹槽370的槽口位于承托件300的沿厚度方向的相对两个表面的至少一者上。可以通过调整凹槽370的槽深、单个凹槽370的横截面面积、凹槽370的数量、相邻两个凹槽370之间的间距等方式来调整承托件300的刚度。例如，图12所示，凹槽370的槽口可以位于第一表面300a；或者，如图13所示，凹槽370的槽口可以位于第二表面300b，可以避免凹槽370对柔性屏220的平整度的影响。或者，如图14所示，凹槽370的槽口可以同时位于第一表面300a和第二表面300b。
当承托件300的不同位置的最小厚度D(图12)不同时，最小厚度D越大的部分承托件300的刚度越大，最小厚度D越小的部分承托件300的刚度越小。一些实施例中，如图14所示，中心部331的最小厚度D可以大于主弯折部332的最小厚度D，从而使得中心部331的刚度大于主弯折部332的刚度，从而可以缓解显示模组200的折痕，其原理已经阐述，不再赘述。
以中心部331设置有凹槽370为例，在凹槽370的槽口位于第一表面300a的实施方式中，如图12所示，中心部331的最小厚度D可以为凹槽370的槽底壁与第二表面300b之间的最小的距离。在凹槽370的槽口位于第二表面300b的实施方式中，如图13所示，中心部331的最小厚度D可以为凹槽370的槽底壁与第一表面300a之间的最小的距离。在第一表面300a和第二表面300b均设置有凹槽370的槽口的实施方式中，如图14所示，槽口位于第一表面300a的凹槽370在柔性屏220上的正投影和槽口位于第二表面300b的凹槽 370在柔性屏220上的正投影至少部分重叠，中心部331的最小厚度D可以为槽口位于第一表面300a的凹槽370的槽底壁和槽口位于第二表面300b的凹槽370的槽底壁之间的最小距离。
示例性的，沿第一方向X，中心部331的最小厚度D可以先增大后减小。这样，沿第一方向X，中心部331的刚度可以从中部向两侧逐渐减小。可以避免中心部331与主弯折部332之间，以及中心部331中因为刚度突变产生局部应力集中，从而可以缓解承托件300的折痕，避免承托件300断裂。其原理已经阐述，不再赘述。
示例性的，沿中心部331至主弯折部332的方向，主弯折部332的最小厚度D可以逐渐减小。这样，沿中心部331至主弯折部332方向，主弯折部332的刚度逐渐减小。可以避免中心部331与主弯折部332之间以及主弯折部332中因为刚度突变产生局部应力集中，从而可以缓解承托件300的折痕，避免承托件300断裂。其原理已经阐述，不再赘述。
示例性的，沿中心部331至主弯折部332的方向，主弯折部332的最小厚度D可以先减小后增大。这样，沿第一方向X，主弯折部332的刚度可以从中部向两侧逐渐增大。可以避免中心部331与主弯折部332之间、连接部340与主弯折部332之间以及主弯折部332中因为刚度突变产生局部应力集中，从而可以缓解承托件300的折痕，避免承托件300断裂。其原理已经阐述，不再赘述。
在承托件300为多层的堆叠结构且设置有凹槽370的实施方式中，如图4和图15所示，第一承托层351可以为完整的整层结构，第一承托层351可以完全覆盖非弯折区200b和弯折区200a的柔性屏220，第一承托层351提供完整的平面。第二承托层352可以包括多个子承托层3521，多个子承托层3521沿第一方向X(图5)间隔设置。相邻两个子承托层3521之间的区域未设置子承托层3521而在第二承托层352上形成开口354，第二承托层352的开口354形成承托件300上的凹槽370。开口354处对应的承托件300的刚度较低，可以通过调整各个子承托层3521的位置，以调整承托件300不同位置的刚度。例如，中心部331、连接部340、第一弯折部320以及固定部310中均可以设置有子承托层3521，主弯折部332中可以未设置子承托层3521。即第二承托层352中的开口354可以位于主弯折部332中，例如，开口354在第一承托层351上的正投影与主弯折部332的第一承托层351重合。此时，连接部340的第二承托层352朝向中心部331一侧的面、中心部331的第二承托层352朝向连接部340一侧的面形成凹槽370的槽侧壁，主弯折部332的第五连接层355背离第一承托层351一侧的面形成凹槽370的槽底壁。使得主弯折部332的刚度小于中心部331的刚度，从而可以缓解承托件300的折痕。其原理已经阐述，不再赘述。通过多个子承托层3521连接在第一承托层351上以在承托件300上形成凹槽370，相比于采用刻蚀方式在承托件300上形成凹槽370，其工艺较为简单，实现较为容易，相应地成本更低。
其中，第二承托层352的厚度可以大于第一承托层351的厚度。由于第一承托层351的厚度较小，第一承托层351的整体弯折性能较好。第二承托层352的厚度较大，第二承托层352的支撑效果较好。在第二承托层352上设置有开口354时，能够同时保证承托件300的支撑性能和弯折性能。
另外，中心部331的第二承托层352的厚度可以小于固定部310的第二承托层352的厚度，可以保证中心部331的弯折性能，以及固定部310的支撑性能。连接部340、第一弯折部320、固定部310的第二承托层352可以为一体件，从而可以降低连接部340、第一弯折部320、固定部310的第二承托件300的制备难度。
以下对示例一和示例二进行说明，示例一中的弯折区200a的承托件300的刚度小于非 弯折区200b的刚度，在弯折区200a中，中心部331、主弯折部332、连接部340以及第一弯折部320的刚度均相同。示例二中，主弯折部332、中心部331、第一弯折部320以及连接部340的刚度依次增加，且连接部340的刚度等于固定部310的刚度。图16中S1示出了示例一的折痕深度的曲线图，示例一的弯折区200a的显示模组200的折痕呈“V”形，且折痕深度约为0.13mm。图16中S2示出了示例二的折痕深度的曲线图，示例二的弯折区200a的显示模组200的折痕呈“W”形，且折痕较为平缓，折痕的深度约为0.05mm。因此，通过合理设计弯折区200a的承托件300的不同位置的刚度，增大中心部331和第一弯折部320的刚度，可以缓解显示模组200的折痕。
以下对本申请实施例提供的显示装置100进行说明。
本实施例提供一种显示装置100，该显示装置100可以包括显示模组200。显示装置100可以为电子纸、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、超级个人计算机、导航仪等具有显示模组200的移动或固定终端。
如图17-图19所示，显示装置100可以包括壳体，壳体可以包括第一壳体111和第二壳体112，第一壳体111和第二壳体112之间转动连接，以实现显示装置100的折叠功能。
显示装置100还可以包括第一支撑件121和第二支撑件122。第一支撑件121和第二支撑件122均位于承托件300背离柔性屏220的一侧。第一支撑件121可以与固定部310对应设置，一个固定部310与一个第一支撑件121连接。第二支撑件122可以与连接部340对应设置，一个连接部340与一个第二支撑件122连接。两个第一支撑件121分别固定在第一壳体111和第二壳体112上，相邻的第一支撑件121和第二支撑件122之间转动连接。第一支撑件121和第二支撑件122可以对显示模组200形成支撑。在显示装置100的折叠过程中，第一支撑件121和第二支撑件122始终为固定部310和连接部340提供平面支撑，可以使得固定部310和连接部340呈平面状态。其中，两个第一支撑件121可以通过铰链组件(图中未示出)转动连接，铰链组件背离柔性屏220的一侧设置有轴盖113，轴盖113对铰链组件形成保护。
这里需要说明的是，本申请实施例涉及的数值和数值范围为近似值，受制造工艺的影响，可能会存在一定范围的误差，这部分误差本领域技术人员可以认为忽略不计。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (20)

  1. 一种显示模组，
    包括层叠设置的柔性屏和承托件，所述承托件位于所述柔性屏的背光侧；
    所述承托件包括沿第一方向排布的固定部、第一弯折部和第二弯折部，所述第一弯折部位于所述固定部和所述第二弯折部之间，所述第二弯折部包括中心部和位于所述中心部沿所述第一方向相对两侧的主弯折部，所述中心部的刚度大于所述主弯折部的刚度。
  2. 根据权利要求1所述的显示模组，其中，所述第一弯折部的刚度大于所述中心部的刚度，
    所述固定部的刚度大于所述第一弯折部的刚度，
    所述中心部的刚度沿所述第一方向先增大后减小。
  3. 根据权利要求1所述的显示模组，其中，所述主弯折部的刚度沿所述中心部至所述主弯折部的方向逐渐减小；或者，所述主弯折部的刚度沿所述中心部至所述主弯折部的方向先减小后增大。
  4. 根据权利要求1所述的显示模组，其中，所述第二弯折部的相邻两个单位面积内的刚度平均值分别为第一刚度和第二刚度，所述第一刚度与所述第二刚度的差值的绝对值除以所述第一刚度的范围为0.05-0.2，
    沿所述第一方向，所述中心部的延伸长度为1mm-2mm。
  5. 根据权利要求1所述的显示模组，其中，所述承托件还包括连接部，所述连接部位于所述第二弯折部与所述第一弯折部之间，所述连接部的刚度大于所述第一弯折部的刚度。
  6. 根据权利要求1-5任一所述的显示模组，其中，所述承托件上间隔设置有多个通孔，所述通孔沿所述承托件的厚度方向贯穿所述承托件，单位面积内的所述中心部的所有所述通孔的面积之和小于单位面积内的所述主弯折部的所有所述通孔的面积之和。
  7. 根据权利要求6所述的显示模组，其中，所述通孔的横截面为条形，所述通孔沿第二方向延伸，所述第二方向与所述第一方向垂直，
    沿所述第二方向，在同一所述通孔中，所述通孔包括第一端和第二端以及位于第一端和第二端之间的中段，所述第一端、所述第二端以及所述中段的沿所述第一方向的延伸长度均大于所述通孔的其余部分的沿所述第一方向的延伸长度。
  8. 根据权利要求7所述的显示模组，其中，沿所述第二方向间隔排布的多个所述通孔构成通孔组，所述通孔组有多个，多个所述通孔组沿所述第一方向间隔排布，相邻两个所述通孔组中的所述通孔沿所述第二方向错位排布。
  9. 根据权利要求6所述的显示模组，其中，各所述通孔的面积均相同，所述中心部的相邻两个所述通孔的间距大于所述主弯折部的相邻两个所述通孔的间距。
  10. 根据权利要求9所述的显示模组，其中，所述中心部的相邻两个所述通孔的间距沿所述第一方向先增大后减小。
  11. 根据权利要求9所述的显示模组，其中，所述主弯折部的相邻两个所述通孔的间距沿所述中心部至所述主弯折部的方向逐渐减小；或，所述主弯折部的相邻两个所述通孔的间距沿所述中心部至所述主弯折部的方向先减小后增大。
  12. 根据权利要求6所述的显示模组，其中，任意相邻两个所述通孔的中心的间距均相同，所述中心部的所述通孔的面积小于所述主弯折部的所述通孔的面积。
  13. 根据权利要求12所述的显示模组，其中，所述中心部的所述通孔的面积沿所述第一方向先减小后增大。
  14. 根据权利要求12所述的显示模组，其中，所述主弯折部的所述通孔的面积沿所述中心部至所述主弯折部的方向逐渐增大；或者，所述主弯折部的所述通孔的面积沿所述中心部至所述主弯折部的方向先增大后减小。
  15. 根据权利要求1-5任一所述的显示模组，其中，所述承托件上设置有凹槽，所述凹槽的槽口位于所述承托件的沿厚度方向的相对两个表面的至少一者上，所述中心部的最小厚度大于所述主弯折部的最小厚度。
  16. 根据权利要求15所述的显示模组，其中，所述中心部的最小厚度沿所述第一方向先增大后减小。
  17. 根据权利要求15所述的显示模组，其中，所述主弯折部的最小厚度沿所述中心部至所述主弯折部的方向逐渐减小，或者，所述主弯折部的最小厚度沿所述中心部至所述主弯折部的方向先减小后增大。
  18. 根据权利要求15所述的显示模组，其中，所述承托件包括依次层叠设置的第一承托层、连接层和第二承托层，所述第二承托层中具有开口，所述开口沿所述承托件的厚度方向贯穿所述第二承托层，所述开口位于所述主弯折部。
  19. 根据权利要求18所述的显示模组，其中，所述第二承托层的厚度大于所述第一承托层的厚度，
    所述中心部的所述第二承托层的厚度小于所述固定部的所述第二承托层的厚度。
  20. 一种显示装置，包括第一支撑件、第二支撑件和上述权利要求1-19任一所述的显示模组，所述第一支撑件和所述第二支撑件均位于所述显示模组的承托件背离所述显示模组的柔性屏的一侧，所述第一支撑件与所述承托件的固定部对应设置，所述第二支撑件与所述承托件的连接部对应设置。
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