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WO2022120711A1 - 显示装置 - Google Patents

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Publication number
WO2022120711A1
WO2022120711A1 PCT/CN2020/135247 CN2020135247W WO2022120711A1 WO 2022120711 A1 WO2022120711 A1 WO 2022120711A1 CN 2020135247 W CN2020135247 W CN 2020135247W WO 2022120711 A1 WO2022120711 A1 WO 2022120711A1
Authority
WO
WIPO (PCT)
Prior art keywords
equal
less
elastic modulus
adhesive layer
display device
Prior art date
Application number
PCT/CN2020/135247
Other languages
English (en)
French (fr)
Inventor
崔越
时博阳
Original Assignee
京东方科技集团股份有限公司
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 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to PCT/CN2020/135247 priority Critical patent/WO2022120711A1/zh
Priority to CN202080003274.XA priority patent/CN115843352A/zh
Priority to US17/615,185 priority patent/US11868182B2/en
Publication of WO2022120711A1 publication Critical patent/WO2022120711A1/zh
Priority to US18/515,373 priority patent/US20240085957A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1675—Miscellaneous details related to the relative movement between the different enclosures or enclosure parts
    • G06F1/1681—Details related solely to hinges
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1615—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function
    • G06F1/1616—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • G06F1/1618—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position the display being foldable up to the back of the other housing with a single degree of freedom, e.g. by 360° rotation over the axis defined by the rear edge of the base enclosure
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G06F1/1652—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being flexible, e.g. mimicking a sheet of paper, or rollable
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1656—Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • 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

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a display device.
  • Outward folding means that the display side of the display device faces outwards in the folded state, and outward folding can provide users with more convenient services, but the display side is located on the outer side, which puts forward high requirements on the scratch resistance and impact resistance of the flexible module;
  • Folding means that the main display panel is located on the inside when it is folded, which can well avoid the occurrence of defects such as scratches on the flexible display module, but it is necessary to add a secondary screen on the outside for quick use.
  • foldable flexible display devices can only achieve outward or inward folding, and there is no display device that can satisfy both inward and outward folding.
  • An object of the present invention is to provide a display device that overcomes, at least to a certain extent, one or more problems due to limitations and disadvantages of the related art.
  • a display device comprising:
  • a first support with a first surface and a second surface arranged oppositely;
  • a second supporting member is provided with a gap between the first supporting member and the second supporting member, and the second supporting member has a third surface and a fourth surface arranged opposite to each other;
  • a flexible display module arranged on the first surface of the first support member and the third surface of the second support member;
  • the region of the first surface close to the second support member is the first matching surface
  • the region of the third surface close to the first support member is the third matching surface
  • the first matching surface Symmetrically arranged with the third mating surface
  • the distance between at least part of the first mating surface and the flexible display module increases as the distance from the second support member decreases
  • at least part of the distance between the first mating surface and the flexible display module increases
  • the distance between the third mating surface and the flexible display module increases as the distance from the first support member decreases, so that when the display device is folded inward, the flexible display module and the first support At least part of a mating surface and at least part of the third mating surface are in contact to form a water drop shape.
  • both the first matching surface and the third matching surface include:
  • the inclined surface is inclined from the bonding plane to the limiting plane to the side away from the flexible display module, and between the inclined surface and the limiting plane, at least one protruding toward the flexible display module is passed between the inclined plane and the limiting plane.
  • the arc surface transitions, and the inclined surface and the cut surface of the arc surface are coplanar, so that when the display device is folded inward, the flexible display module contacts the arc surface and the limiting plane to form a water drop shape.
  • the inclination angle of the inclined surface is greater than or equal to 10 degrees and less than or equal to 20 degrees
  • the width of the limiting plane is greater than or equal to 5 mm and less than or equal to 7 mm
  • the limiting plane is equal to or greater than 7 mm.
  • the sum of the widths of the inclined surfaces is greater than or equal to 13 mm and less than or equal to 15 mm.
  • the flexible display module includes:
  • a protective layer disposed on the side of the flexible support plate away from the first support and the second support;
  • a backsheet layer disposed on the side of the protective layer away from the flexible support plate
  • a first adhesive layer located on the side of the backsheet layer away from the flexible support plate
  • a flexible display panel disposed on the side of the first adhesive layer away from the flexible support plate;
  • a second adhesive layer disposed on the side of the flexible display panel away from the flexible support plate
  • a polarizer arranged on the side of the second adhesive layer away from the flexible support plate
  • a third adhesive layer disposed on the side of the polarizer away from the flexible support plate
  • the first cover plate is arranged on the side of the third adhesive layer away from the flexible support plate.
  • the thickness of the flexible support plate is greater than or equal to 140 ⁇ m and less than or equal to 160 ⁇ m, and the equivalent elastic modulus is greater than or equal to 8 Kpa and less than or equal to 12 Kpa.
  • the material of the first adhesive layer is OCA optical adhesive
  • the thickness is greater than or equal to 12 ⁇ m and less than or equal to 18 ⁇ m
  • its elastic modulus is greater than or equal to 35 KPa and less than or equal to 35 KPa at a temperature of 25° C. Equal to 55Kpa; when the temperature is -20°C, its elastic modulus is greater than or equal to 120KPa and less than or equal to 140Kpa; when the temperature is 60°C, its elastic modulus is greater than or equal to 35KPa and less than or equal to 45KPa.
  • the material of the second adhesive layer is OCA optical adhesive
  • the thickness is greater than or equal to 10 ⁇ m and less than or equal to 20 ⁇ m
  • its elastic modulus is greater than or equal to 70 KPa and less than or equal to 70 KPa. It is equal to 90KPa
  • when the temperature is -20°C its elastic modulus is greater than or equal to 120KPa and less than or equal to 140KPa
  • when the temperature is 65°C its elastic modulus is greater than or equal to 60KPa and less than or equal to 80KPa.
  • the thickness of the first cover plate is greater than or equal to 80 ⁇ m and less than or equal to 90 ⁇ m.
  • the thickness of the polarizer is greater than or equal to 40 ⁇ m and less than or equal to 50 ⁇ m, and the elastic modulus is greater than or equal to 2.7 GPa and less than or equal to 3.7 GPa.
  • the thickness of the backsheet layer is greater than or equal to 20 ⁇ m and less than or equal to 26 ⁇ m, and the elastic modulus is greater than or equal to 2.7 GPa and less than or equal to 3.7 GPa.
  • the material of the third adhesive layer is OCA optical adhesive
  • the curing rate is greater than or equal to 65% and less than or equal to 71%
  • the thickness is greater than or equal to 45 ⁇ m and less than or equal to 55 ⁇ m
  • the temperature is 25 At °C, its elastic modulus is greater than or equal to 45KPa and less than or equal to 65KPa; when the temperature is -20°C, its elastic modulus is greater than or equal to 110KPa and less than or equal to 130Kpa; when the temperature is 60°C, its elastic modulus is greater than or equal to 30KPa and less than or equal to 40Kpa; or
  • the material of the third adhesive layer is OCA optical adhesive, the curing rate is greater than or equal to 65% and less than or equal to 71%, the thickness is greater than or equal to 90 ⁇ m and less than or equal to 110 ⁇ m, and when the temperature is 25°C, its elastic modulus is greater than or equal to 45KPa and Less than or equal to 65KPa; when the temperature is -20°C, its elastic modulus is greater than or equal to 110KPa and less than or equal to 130KPa; when the temperature is 60°C, its elastic modulus is greater than or equal to 30KPa and less than or equal to 40KPa; or
  • the material of the third adhesive layer is OCA optical adhesive, the curing rate is greater than or equal to 65% and less than or equal to 71%, the thickness is greater than or equal to 45 ⁇ m and less than or equal to 55 ⁇ m, and at a temperature of 25°C, its elastic modulus is less than or equal to 130KPa and Less than or equal to 150KPa.
  • the thickness of the backsheet layer is greater than or equal to 20 ⁇ m and less than or equal to 26 ⁇ m, and the elastic modulus is greater than or equal to 8 GPa and less than or equal to 10 Gpa; and the material of the third adhesive layer is OCA optical adhesive , the curing rate is greater than or equal to 65% and less than or equal to 71%, the thickness is greater than or equal to 45 ⁇ m and less than or equal to 55 ⁇ m, when the temperature is 25°C, its elastic modulus is greater than or equal to 45KPa and less than or equal to 65KPa; when the temperature is -20°C, its The elastic modulus is greater than or equal to 110KPa and less than or equal to 130Kpa; when the temperature is 60°C, the elastic modulus is greater than or equal to 30KPa and less than or equal to 40Kpa.
  • the thickness of the polarizer is greater than or equal to 80 ⁇ m and less than or equal to 100 ⁇ m, and the elastic modulus is greater than or equal to 2.7 GPa and less than or equal to 3.7 Gpa; and the thickness of the backsheet layer is greater than or equal to 20 ⁇ m and Less than or equal to 26 ⁇ m, the elastic modulus is greater than or equal to 2.7GPa and less than or equal to 3.7Gpa; and the material of the third adhesive layer is OCA optical adhesive, the curing rate is greater than or equal to 65% and less than or equal to 71%, and the thickness is greater than or equal to 45 ⁇ m and less than or equal to 55 ⁇ m, when the temperature is 25°C, its elastic modulus is greater than or equal to 45KPa and less than or equal to 65KPa; when the temperature is -20°C, its elastic modulus is greater than or equal to 110KPa and less than or equal to 130Kpa; when the temperature is 60°C, its
  • the flexible display module further includes:
  • a fourth adhesive layer located on the side of the first cover plate away from the flexible support plate;
  • the second cover plate is arranged on the side of the fourth adhesive layer away from the flexible support plate.
  • the thickness of the second cover plate is greater than or equal to 80 ⁇ m and less than or equal to 90 ⁇ m.
  • FIG. 1 is a schematic structural diagram of an exemplary embodiment of a display device of the present invention
  • FIG. 2 is a schematic structural diagram of the display device in FIG. 1 in an inwardly folded state
  • FIG. 3 is a schematic structural diagram of the display device in FIG. 1 in an outwardly folded state
  • FIG. 4 is a schematic diagram of the overall structure of the first support member and the second support member in FIG. 1 after being connected;
  • Fig. 5 is the structural schematic diagram of the joint after the first support member and the second support member are connected in Fig. 4;
  • FIG. 6 is a schematic structural diagram of an exemplary embodiment of the flexible display module in FIG. 1;
  • Fig. 7 is the strain finite element simulation schematic diagram of the second adhesive layer and the third adhesive layer in Fig. 6;
  • FIG. 8 is a schematic diagram of strain finite element simulation of the flexible display panel in FIG. 6;
  • FIG. 9 is a schematic structural diagram of another exemplary embodiment of the flexible display module in FIG. 1 .
  • the first support 11. The first surface; 111. The first mating surface; 12. The second surface; 13. The first gear;
  • a bonding plane
  • b inclined plane
  • c arc surface (arc surface);
  • d limit plane
  • the first frame 62.
  • the second frame 62.
  • Example embodiments will now be described more fully with reference to the accompanying drawings.
  • Example embodiments can be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
  • the same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.
  • the force of each film layer is different.
  • the film layer that is under pressure when folded inward may receive tension when it is folded outward, and the film layer that is under tension when folded inward is outside. It may receive pressure when folded; if the foldable flexible display device can satisfy both inward and outward folding, the strain of each film layer is relatively large, especially in the inward folding state, the maximum strain of each film layer generally occurs in inner folding. In this state, the adhesive material is easy to fail, and the functional layer of the flexible display panel also fails due to large strain, so that the foldable flexible display device cannot display normally.
  • the water drop shape formed when the foldable flexible display device is folded inward is not smooth, which will form a folded angle, which will also lead to a large strain of each film layer, which is easy to cause the glue material to fail, and the functional layer of the flexible display panel 35 is also The foldable flexible display device cannot display normally due to failure due to large strain.
  • the display device may include a first support member 1 , a second support member 2 and a flexible Display module 3; the first support 1 has a first surface 11 and a second surface 12 arranged oppositely; a gap 8 is provided between the second support 2 and the first support 1, and the second support 2 has an opposite arrangement The third surface 21 and the fourth surface 22 of the first support member 1; the flexible display module 3 is arranged on the first surface 11 of the first support member 1 and the third surface 21 of the second support member 2; wherein, the first surface 11 is close to the second surface
  • the region of the support member 2 is the first matching surface 111
  • the region of the third surface 21 close to the first support member 1 is the third matching surface 211
  • the first matching surface 111 and the third matching surface 211 are symmetrically arranged, at least part of the first matching surface 211
  • the distance between at least part of the first mating surface 111 and the flexible display module 3 increases as the distance from the second supporting member 2 decreases, and the first mating surface 111 is mated with the third
  • the surfaces 211 are symmetrically arranged, that is, the distance between at least part of the third mating surface 211 and the flexible display module 3 increases as the distance from the first support 1 decreases; when the display device is folded inward, the flexible display module 3.
  • the water drop shape formed by the flexible display module 3 is relatively It is smooth and does not form a folded angle, which avoids the stress of each film layer being large, thereby avoiding the failure of the adhesive material and the functional layer, and is suitable for display devices that meet the conditions of inward folding and outward folding at the same time.
  • the so-called “far away” and “closer” refer to when the display device is in a flattened state.
  • the length direction is a direction perpendicular to the bending direction of the display device
  • the width direction is a direction perpendicular to the length direction and parallel to the flexible display module 3 .
  • the first support 1 has a first surface 11 and a second surface 12 , and the first surface 11 and the second surface 12 are disposed opposite to each other.
  • the second surface 12 can be set as a plane, and the flexible display module 3 can be set on the first surface 11 .
  • the second support 2 has a third surface 21 and a fourth surface 22 , and the third surface 21 and the fourth surface 22 are disposed opposite to each other.
  • the fourth surface 22 can be set as a plane, and the flexible display module 3 can be set on the third surface 21 .
  • the structures of the first support 1 and the second support 2 can be completely the same; a gap 8 is provided between the second support 2 and the first support 1, and the first support 1 and the second support 2 are symmetrically arranged, That is, the first surface 11 and the third surface 21 are symmetrical.
  • a region of the first surface 11 close to the second support member 2 is a first mating surface 111
  • the first mating surface 111 may include a bonding plane a, an inclined plane b, and a limiting plane d.
  • the bonding plane a is located at one end of the first mating surface 111 away from the bend
  • the limiting plane d is located at one end of the first support 1 close to the bend.
  • the limit plane d is arranged in parallel with the bonding plane a, and both are parallel to the flexible display module 3; the flexible display module 3 is bonded on the bonding plane a through the bonding layer 5; in the flattened state, the limit plane There is an interval between d and the flexible display module 3 .
  • the area of the third surface 21 close to the first support member 1 is the third matching surface 211 , and the third matching surface 211 may also include a bonding plane a, an inclined plane b, and a limiting plane d.
  • the bonding plane a is located at an end of the third mating surface 211 away from the bend
  • the limiting plane d is located at an end of the second support 2 close to the bend.
  • the limit plane d is arranged in parallel with the bonding plane a, and both are parallel to the flexible display module 3; the flexible display module 3 is bonded on the bonding plane a through the bonding layer 5; in the flattened state, the limit plane There is an interval between d and the flexible display module 3 .
  • the inclined surface b is connected between the bonding plane a and the limiting plane d. There is a smooth transition between the inclined plane b and the bonding plane a, and the inclined plane b is inclined from the bonding plane a to the limit plane d to the side away from the flexible display module 3, and the inclination angle ⁇ of the inclined plane b is about 15 degrees. That is, the angle ⁇ between the inclined surface b and the second surface 12 is about 15 degrees, and the angle ⁇ between the inclined surface b and the fourth surface 22 is also about 15 degrees.
  • the inclination angle ⁇ of the inclined surface b may be greater than or equal to 10 degrees and less than or equal to 20 degrees.
  • the transition between the inclined surface b and the limit plane d is through the arc surface c protruding to the flexible display module 3, and the tangent plane of the inclined plane b and the arc surface c is coplanar, that is, the connection between the inclined plane b and the limit plane d
  • There is an arc surface c the arc surface c protrudes toward the flexible display module 3, and the arc surface c is tangent to the inclined surface b, so that the arc surface c and the inclined surface b smoothly transition.
  • the first support 1 at the arc surface c forms a partial cylinder
  • the tangential plane of the cylinder is a plane passing through a generatrix of the cylinder and perpendicular to the axial section passing through the generatrix.
  • the arc surface c connected between the inclined surface b and the limiting plane d may also be an elliptical arc surface c, a parabolic arc surface c, etc., as long as it can be folded in the display device When contacting with the flexible display module 3, the flexible display module 3 can form a relatively smooth drop shape.
  • the width L1 of the limit plane d is about 6mm ⁇ 1mm. It should be noted that the width L1 of the limit plane d is about 6mm ⁇ 1mm, which means that the limit plane d has a width L1 of about 6mm ⁇ 1mm.
  • the width L1 is greater than or equal to 5mm (6mm-1mm) and less than or equal to 7mm (6mm+1mm). Each data mentioned later represents an interval value rather than a point value; it corresponds to the numerical range in the claims.
  • the sum L2 of the widths of the inclined surface b and the limiting plane d is about 14mm ⁇ 1mm.
  • the minimum distance H1 between the first support member 1 and the second support member 2 is about 2 mm, and the shape of the inward folding is a smooth droplet shape, and the radius R1 is about 3 mm; as shown in FIG. 3 , the display device
  • the maximum distance H2 between the first support member 1 and the second support member 2 after the outward folding is about 10 mm, and the outward folding shape is a smooth "U" shape, and the radius R2 is about 5 mm.
  • the width of the limiting plane d and the width of the inclined plane b can also be set as required.
  • the bonding plane a extends to the side away from the bend to support the flexible display module 3. Since the structures of the first support 1 and the second support 2 can be completely the same, the first support The extension length of the bonding plane a of the support 1 is the same as the extension length of the bonding plane a of the second support 2 .
  • the first mating surface 111 and the third mating surface 211 can be formed into a shape that completely matches the smooth water drop shape to be formed, so that when the display device is folded inwardly, the flexible display module 3 is completely attached to the first matching surface 111 and the third matching surface 211 to support the flexible display module 3 .
  • the structures of the first support member 1 and the second support member 2 may also be different, for example, the width of the first support member 1 and the width of the second support member 2 may be different, that is, the bonding plane a of the first support member 1
  • the extension length is not the same as the extension length of the bonding plane a of the second support member 2, so that the bending part of the display device is not located in the middle position; as long as the first mating surface 111 and the third mating surface 211 are arranged symmetrically, the formation can be guaranteed.
  • the smooth and symmetrical drop shape avoids the display failure caused by the uneven force of the flexible display module 3 and each functional layer when it is folded inward.
  • a first frame 61 is also provided on the outer periphery of the first support member 1 , and the first frame 61 surrounds the other three edges of the first support member 1 except for the first mating surface 111 , And the two ends of the first frame 61 also protrude from the first matching surface 111 , and two first fixing shafts are provided at the two ends of the first frame 61 protruding from the first matching surface 111 in a one-to-one correspondence.
  • a first gear 13 is provided thereon.
  • a second frame 62 is also disposed on the outer periphery of the second support member 2 .
  • the second frame 62 surrounds the other three edges of the second support member 2 except for the third mating surface 211 , and both ends of the second frame 62 are also Protruding from the third mating surface 211 , two ends of the second frame 62 protruding from the third mating surface 211 are provided with two second fixed shafts in a one-to-one correspondence, and the second fixed shafts are provided with a second gear 23 .
  • the display device further includes two connecting parts 7 , the structures of the two connecting parts 7 are the same, and the connecting part 7 includes at least one matching gear 71 , and the matching gear 71 is arranged on the first gear 13 and the second gear 71 . between the gears 23 and externally meshed with the first gear 13 and the second gear 23, so that both the first support 1 and the second support 2 can be rotated relative to the connecting part 7 to realize the inward or outward folding of the display device .
  • the flexible display module 3 may include: a flexible support plate 31 , a protective layer 32 , a backsheet layer 33 , a first adhesive layer 34 , and a flexible display panel 35 , the second adhesive layer 36 , the polarizer 37 , the third adhesive layer 38 , the first cover 39 , the fourth adhesive layer 40 and the second cover 41 .
  • the flexible support plate 31 is bonded to part of the first surface 11 and part of the third surface 21 .
  • the protective layer 32 is disposed on the side of the flexible support plate 31 away from the first support member 1 and the second support member 2; the backsheet layer 33 is disposed on the side of the protective layer 32 away from the flexible support plate 31; the first adhesive layer 34 is disposed on the side on the side of the backsheet layer 33 away from the flexible support plate 31 ; the flexible display panel 35 is disposed on the side of the first adhesive layer 34 away from the flexible support plate 31 ; the second adhesive layer 36 is disposed on the side of the flexible display panel 35 away from the flexible support plate 31 one side of the polarizer 31; the polarizer 37 is arranged on the side of the second adhesive layer 36 away from the flexible support plate 31; the third adhesive layer 38 is arranged on the side of the polarizer 37 away from the flexible supporting plate 31; the first cover plate 39 is arranged on the side of the third glue layer 38 away from the flexible support plate 31; the fourth glue layer 40 is arranged on the side of the first cover plate 39 away from the flexible support plate 31; the second cover plate 41 is arranged on the fourth glue
  • each film layer of the flexible display module 3 is described above, and the thickness and performance requirements of each film layer are described below.
  • the flexible support plate 31 can be a metal support plate, the thickness of the flexible support plate 31 can be 150 ⁇ m ⁇ 10 ⁇ m, and the equivalent elastic modulus can be 10Kpa ⁇ 2Kpa.
  • the flexible support plate 31 provides support for the entire flexible display module 3 .
  • the material of the protective layer 32 can be foam, the protective layer 32 can protect the backsheet layer 33 and avoid the damage of the flexible support plate 31 to the backsheet layer 33, and there are adhesive layers on both sides of the protective layer 32 for bonding the flexible support plate 31 and the backsheet Layer 33.
  • the material of the backsheet layer 33 may be polyimide, the thickness of the backsheet layer 33 may be 23 ⁇ m ⁇ 3 ⁇ m, and the elastic modulus may be 3.2 GPa ⁇ 0.5 Gpa.
  • the function of the backsheet layer 33 is to support and protect the flexible display panel 35 .
  • the material of the first adhesive layer 34 may be OCA optical adhesive (Optically Clear Adhesive), and the thickness of the first adhesive layer 34 may be 15 ⁇ m ⁇ 3 ⁇ m.
  • OCA optical adhesive Optically Clear Adhesive
  • the thickness of the first adhesive layer 34 may be 15 ⁇ m ⁇ 3 ⁇ m.
  • the first adhesive layer 34 is used for bonding the flexible display panel 35 and the backsheet layer 33 .
  • OCA Optical Adhesive is a special adhesive for bonding transparent optical components (such as lenses, etc.). It is required to be colorless and transparent, light transmittance of more than 90%, good bonding strength, can be cured at room temperature or medium temperature, and has the characteristics of small curing shrinkage; OCA optical adhesive is a layer of optically transparent special substrate-free adhesive. Double-sided tape.
  • the flexible display panel 35 can be an OLED (Organic Electroluminesence Display, organic light-emitting semiconductor) display panel or a QLED (Quantum Dots Light Emitting Diode Display, quantum dot light-emitting diode) display panel, etc.
  • the flexible display panel 35 can be any kind of flexible The specific structure of the display panel is not repeated here.
  • the material of the second adhesive layer 36 can also be OCA optical adhesive, the thickness of the second adhesive layer 36 can be 15 ⁇ m ⁇ 5 ⁇ m, and its elastic modulus is 80KPa ⁇ 10KPa when the temperature is 25°C; When the temperature is °C, its elastic modulus is 130KPa ⁇ 10Kpa; when the temperature is 65°C, its elastic modulus is 70KPa ⁇ 10KPa.
  • the second adhesive layer 36 is used for bonding the flexible display panel 35 and the polarizer 37 .
  • the thickness of the polarizer 37 may be 45 ⁇ m ⁇ 5 ⁇ m, and its elastic modulus is 3.2 GPa ⁇ 0.5 GPa.
  • the basic structure of the polarizer 37 includes: the middlemost PVA (polyvinyl alcohol), two layers of TAC (triacetate cellulose), PSA film (pressure sensitive adhesive), Release film (release film) and Protective film (protective film) .
  • the PVA layer plays a polarizing role, but PVA is very easy to hydrolyze.
  • TAC composite layer of high light transmittance, good water resistance and certain mechanical strength is placed on both sides of the PVA.
  • the material of the third adhesive layer 38 can also be OCA optical adhesive, the thickness of the third adhesive layer 38 can be 50 ⁇ m ⁇ 5 ⁇ m, and its elastic modulus is 55KPa ⁇ 10KPa when the temperature is 25°C; When the temperature is °C, its elastic modulus is 120KPa ⁇ 10Kpa; when the temperature is 60°C, its elastic modulus is 35KPa ⁇ 5KPa.
  • the curing rate of the third adhesive layer 38 is 68% ⁇ 3%.
  • the third adhesive layer 38 is used for bonding the polarizer 37 and the first cover plate 39 .
  • the thicknesses of the first cover plate 39 and the second cover plate 41 may both be 85 ⁇ m ⁇ 5 ⁇ m.
  • the materials of the first cover plate 39 and the second cover plate 41 may be polyimide or polyimide and PET (Polyethylene terephthalate, polyethylene terephthalate plastic).
  • the fourth adhesive layer 40 is used for bonding the first cover plate 39 and the second cover plate 41 . Providing two layers of cover plates (the first cover plate 39 and the second cover plate 41 ) can increase the scratch resistance and impact resistance of the display device, and avoid damage to each functional layer caused by scratches and impacts when the display device is folded out.
  • the thickness of the third adhesive layer 38 can be adjusted, specifically: the material of the third adhesive layer 38 can also be OCA optical adhesive,
  • the thickness of the second adhesive layer 36 can be 100 ⁇ m ⁇ 10 ⁇ m, and its elastic modulus is 55KPa ⁇ 10KPa when the temperature is 25°C; and its elastic modulus is 120KPa ⁇ 10Kpa when the temperature is -20°C; When the temperature is 60°C, its elastic modulus is 35KPa ⁇ 5KPa.
  • the curing rate of the third adhesive layer 38 is 68% ⁇ 3%.
  • the elastic modulus of the third adhesive layer 38 can be adjusted, specifically: the material of the third adhesive layer 38 can also be OCA optical Adhesive, the thickness of the second adhesive layer 36 can be 50 ⁇ m ⁇ 5 ⁇ m, and its elastic modulus is 140KPa ⁇ 10KPa when the temperature is 25°C.
  • the curing rate of the third adhesive layer 38 is 68% ⁇ 3%.
  • the thickness of the polarizer 37 can be adjusted. Specifically, the thickness of the polarizer 37 can be 90 ⁇ m ⁇ 10 ⁇ m, and its elastic modulus is 3.2GPa ⁇ 0.5GPa.
  • the elastic modulus of the backsheet layer 33 can be adjusted.
  • the thickness of 33 may be 23 ⁇ m ⁇ 3 ⁇ m, and the elastic modulus is 9 GPa ⁇ 1 Gpa.
  • the ordinate in the figure is the amount of strain; referring to the schematic diagram of the strain finite element simulation of the flexible display panel 35 shown in FIG. 8, FIG.
  • the middle ordinate is the dependent variable.
  • the strains in the figure are all the maximum strains during the process of the display device changing from an inwardly folded state to an outwardly folded state. The comparison of each data below is to compare each example implementation with the first example implementation.
  • the strain of the second adhesive layer 36 is about 124%, the strain of the third adhesive layer 38 is about 136%, and the strain of the flexible display panel 35 is about 0.225%;
  • the strains of the display panel 35 , the second adhesive layer 36 and the third adhesive layer 38 are all relatively small.
  • the strain of the second adhesive layer 36 is slightly reduced to about 122%; however, the strain of the third adhesive layer 38 is increased more, to about 180%; the flexible display panel 35 The strain increased slightly to about 0.23%.
  • the strain of the second adhesive layer 36 is increased by a large amount, up to about 162%; the strain of the third adhesive layer 38 is increased by a large amount, up to about 160%; the flexible display panel 35 The strain also increased more, to about 0.42%.
  • the strain of the second adhesive layer 36 is slightly increased to about 148%; the strain of the third adhesive layer 38 is slightly increased to about 142%; the flexible display panel 35 The strain is slightly reduced to about 0.21%.
  • the strain of the second adhesive layer 36 remains basically unchanged; the strain of the third adhesive layer 38 is slightly reduced to about 134%; the strain of the flexible display panel 35 increases more, increased to about 0.46%.
  • the first exemplary embodiment is superior, the second and fourth exemplary embodiments are second, and the third and fifth exemplary embodiments are the worst.
  • the strain of each film layer in the above five example embodiments is smaller than the strain of the corresponding film layer in the prior art, and it is obtained through experiments that the strains of the second adhesive layer 36 and the third adhesive layer 38 in the prior art are equal to each other. greater than 200%, while the strains of the flexible display panels are all greater than 0.5%.
  • the fourth adhesive layer 40 and the second cover plate 41 may not be provided.
  • the terms “a”, “an”, “the”, “the” and “at least one” are used to indicate the presence of one or more elements/components/etc.; the terms “comprising”, “including” and “Having” is used to indicate an open-ended inclusive meaning and to mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms “first”, “secondary” “ and “Third” etc. are used only as markers, not as restrictions on the number of their objects.

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Abstract

一种显示装置，显示装置包括第一支撑件（1）、第二支撑件（2）和柔性显示模组（3）；第二支撑件（2）与第一支撑件（1）之间设置有间隙（8）；柔性显示模组（3）设于第一支撑件（1）的第一面（11）和第二支撑件（2）的第三面（21）；第一面（11）的靠近第二支撑件（2）的区域为第一配合面（111），第三面（21）的靠近第一支撑件（1）的区域为第三配合面（211），第一配合面（111）与第三配合面（211）对称设置；至少部分第一配合面（111）与柔性显示模组（3）之间距离随着与第二支撑件（2）的距离的减小而增大，至少部分第三配合面（211）与柔性显示模组（2）之间距离随着与第一支撑件（1）的距离的减小而增大，使显示装置内折时，柔性显示模组（3）与第一配合面（111）的至少部分和第三配合面（211）的至少部分接触形成水滴形。显示装置能够同时满足内折和外折的条件。

Description

显示装置 技术领域
本公开涉及显示技术领域，尤其涉及一种显示装置。
背景技术
随着科技的发展，可折叠柔性显示装置已经走入了普通消费者的视野。外折是指显示装置在折叠状态时显示侧朝外，外折可为用户提供更便利的服务，但是显示侧位于外侧对柔性模组耐刮擦和耐冲击性能提出了很高的要求；内折是指主显示面板在折叠状态时位于内侧，可很好的避免柔性显示模组刮伤等不良的发生，但需要在外侧增加一块副屏以便快捷使用。
目前，可折叠柔性显示装置只能实现外折或内折，没有可同时满足内折和外折的显示装置。
需要说明的是，在上述背景技术部分发明的信息仅用于加强对本公开的背景的理解，因此可以包括不构成对本领域普通技术人员已知的现有技术的信息。
发明内容
本发明的目的在于提供一种显示装置，进而至少在一定程度上克服由于相关技术的限制和缺陷而导致的一个或者多个问题。
根据本公开的一个方面，提供一种显示装置，包括：
第一支撑件，具有相对设置的第一面和第二面；
第二支撑件，与所述第一支撑件之间设置有间隙，所述第二支撑件具有相对设置的第三面和第四面；
柔性显示模组，设于所述第一支撑件的第一面和所述第二支撑件的第三面；
其中，所述第一面的靠近所述第二支撑件的区域为第一配合面，所述第三面的靠近所述第一支撑件的区域为第三配合面，所述第一配合面与所述第三配合面对称设置；至少部分所述第一配合面与所述柔性显示模组之间距离随着与所述第二支撑件的距离的减小而增大，至少部分所述第三配合面与所述柔性显示模组之间距离随着与所述第一支撑件的距离的减小而增大，使显示装置内折时，所述柔性显示模组与所述第一配合面的至少部分和所述第三配合面的至少部分接触形成水滴形。
在本公开的一种示例性实施例中，所述第一配合面和所述第三配合面均包括：
粘接平面，其上粘接所述柔性显示模组；
倾斜面，与所述粘接平面连接，所述倾斜面与所述粘接平面之间圆滑过渡；
限位平面，与所述倾斜面连接，所述限位平面与所述粘接平面平行设置；
其中，所述倾斜面从粘接平面到限位平面向远离所述柔性显示模组一侧倾斜，所述倾斜面与所述限位平面之间通过向所述柔性显示模组突出的至少一个弧面过渡，且所述倾斜面与所述弧面的切面共面，使显示装置内折时，所述柔性显示模组与所述弧面以及限位平面接触形成水滴形。
在本公开的一种示例性实施例中，所述倾斜面的倾斜角度大于等于10度且小于等于20度，所述限位平面的宽度大于等于5mm且小于等于7mm，所述限位平面与所述倾斜面的宽度之和大于等于13mm且小于等于15mm。
在本公开的一种示例性实施例中，所述柔性显示模组包括：
柔性支撑板，粘接于部分所述第一面和部分所述第三面；
保护层，设于所述柔性支撑板的远离所述第一支撑件和所述第二支撑的一侧；
底片层，设于所述保护层的远离所述柔性支撑板的一侧；
第一胶层，设于所述底片层的远离所述柔性支撑板的一侧；
柔性显示面板，设于所述第一胶层的远离所述柔性支撑板的一侧；
第二胶层，设于所述柔性显示面板的远离所述柔性支撑板的一侧；
偏光片，设于所述第二胶层的远离所述柔性支撑板的一侧；
第三胶层，设于所述偏光片的远离所述柔性支撑板的一侧；
第一盖板，设于所述第三胶层的远离所述柔性支撑板的一侧。
在本公开的一种示例性实施例中，所述柔性支撑板的厚度大于等于140μm且小于等于160μm，等效弹性模量大于等于8Kpa且小于等于12Kpa。
在本公开的一种示例性实施例中，所述第一胶层的材质为OCA光学胶，厚度大于等于12μm且小于等于18μm，在温度为25℃时，其弹性模量大于等于35KPa且小于等于55Kpa；在温度为-20℃时，其弹性模量大于等于120KPa且小于等于140Kpa；在温度为60℃时，其弹性模量大于等于35KPa且小于等于45KPa。
在本公开的一种示例性实施例中，所述第二胶层的材质为OCA光学胶，厚度大于等于10μm且小于等于20μm，在温度为25℃时，其弹性模量大于等于70KPa且小于等于90KPa；在温度为-20℃时，其弹性模量大于等于120KPa且小于等于140Kpa；在温度为65℃时，其弹性模量大于等于60KPa且小于等于80KPa。
在本公开的一种示例性实施例中，所述第一盖板的厚度大于等于80μm且小于等于90μm。
在本公开的一种示例性实施例中，所述偏光片的厚度大于等于40μm且小于等于50μm，弹性模量大于等于2.7GPa且小于等于3.7GPa。
在本公开的一种示例性实施例中，所述底片层的厚度大于等于20μm且小于等于26μm，弹性模量大于等于2.7GPa且小于等于3.7Gpa。
在本公开的一种示例性实施例中，所述第三胶层的材质为OCA光学胶，固化率大于等于65％且小于等于71％，厚度大于等于45μm且小于等于55μm，在温度为25℃时，其弹性模量大于等于45KPa且小于等于65KPa；在温度为-20℃时，其弹性模量大于等于110KPa且小于等于130Kpa；在温度为60℃时，其弹性模量大于等于30KPa且小于等于40Kpa；或
所述第三胶层的材质为OCA光学胶，固化率为大于等于65％且小于等于71％，厚度大于等于90μm且小于等于110μm，在温度为25℃时，其弹性模量大于等于45KPa且小于等于65KPa；在温度为-20℃时，其弹性模量大于等于110KPa且小于等于130Kpa；在温度为60℃时，其弹性模量大于等于30KPa且小于等于40KPa；或
所述第三胶层的材质为OCA光学胶，固化率大于等于65％且小于等于71％，厚度大于等于45μm且小于等于55μm，在温度为25℃时，其弹性模量且小于等于130KPa且小于等于150KPa。
在本公开的一种示例性实施例中，所述底片层的厚度大于等于20μm且小于等于26μm，弹性模量大于等于8GPa且小于等于10Gpa；且所述第三胶层的材质为OCA光学胶，固化率大于等于65％且小于等于71％，厚度大于等于45μm且小于等于55μm，在温度为25℃时，其弹性模量大于等于45KPa且小于等于65KPa；在温度为-20℃时，其弹性模量大于等于110KPa且小于等于130Kpa；在温度为60℃时，其弹性模量大于等于30KPa且小于等于40Kpa。
在本公开的一种示例性实施例中，所述偏光片的厚度大于等于80μm且小于等于100μm，弹性模量大于等于2.7GPa且小于等于3.7Gpa；且所述底片层的厚度大于等于20μm且小于等于26μm，弹性模量大于等于2.7GPa且小于等于3.7Gpa；且所述第三胶层的材质为OCA光学胶，固化率大于等于65％且小于等于71％，厚度大于等于45μm且小于等于55μm，在温度为25℃时，其弹性模量大于等于45KPa且小于等于65KPa；在温度为-20℃时，其弹性模量大于等于110KPa且小于等于130Kpa；在温度为60℃时，其弹性模量大于等于30KPa且小于等于40Kpa。
在本公开的一种示例性实施例中，所述柔性显示模组还包括：
第四胶层，设于所述第一盖板的远离所述柔性支撑板的一侧；
第二盖板，设于所述第四胶层的远离所述柔性支撑板的一侧。
在本公开的一种示例性实施例中，所述第二盖板的厚度大于等于80μm且小于等于90μm。
本公开的其他特性和优点将通过下面的详细描述变得显然，或部分地通过本公开的实践而习得。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
通过参照附图详细描述其示例实施方式，本发明的上述和其它特征及优点将变得更加明显。
图1是本发明显示装置一示例实施方式的结构示意图；
图2是图1中的显示装置处于内折状态的结构示意图；
图3是图1中的显示装置处于外折状态的结构示意图；
图4是图1中的第一支撑件和第二支撑件连接后的整体结构示意图；
图5是图4中第一支撑件和第二支撑件连接后连接处的结构示意图；
图6是图1中的柔性显示模组一示例实施方式的结构示意图；
图7是图6中的第二胶层和第三胶层的应变有限元仿真示意图；
图8是图6中的柔性显示面板的应变有限元仿真示意图；
图9是图1中的柔性显示模组另一示例实施方式的结构示意图。
图中主要元件附图标记说明如下：
1、第一支撑件；11、第一面；111、第一配合面；12、第二面；13、第一齿轮；
2、第二支撑件；21、第三面；211、第三配合面；22、第四面；23、第二齿轮；
a、粘接平面；b、倾斜面；c、弧面(圆弧面)；d、限位平面；
3、柔性显示模组；31、柔性支撑板；32、保护层；33、底片层；34、第一胶层；35、柔性显示面板；36、第二胶层；37、偏光片；38、第三胶层；39、第一盖板；40、第四胶层；41、第二盖板；
5、粘接层；
61、第一边框；62、第二边框；
7、连接部；71、配合齿轮；
8、间隙。
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的实施方式；相反，提供这些实施方式使得本发明将全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。图中相同的附图标记表示相同或类似的结构，因而将省略它们的详细描述。
可折叠柔性显示装置处于内折和外折状态时，各膜层的受力不同，例如，内折时受到压力的膜层在外折时可能会收到拉力，内折时受到拉力的膜层在外折时可能会收到压力；如果可折叠柔性显示装置能够同时满足内折和外折，各个膜层的应变较大，特别是内折状态时，各个膜层的最大应变量一般产生在内折状态时，容易使胶材失效，且柔性显示面板的功能层也由于应变较大而失效，从而导致可折叠柔性显示装置无法正常显示。
而且，相关技术中可折叠柔性显示装置内折时形成的水滴形不圆滑，会形成折角，也会导致各个膜层的应变较大，容易使胶材失效，且柔性显示面板35的功能层也由于应变较大而失效，从而导致可折叠柔性显示装置无法正常显示。
本示例实施方式提供了一种显示装置，参照图1-图3所示的本发明显示装置一示例实施方式的结构示意图，该显示装置可以包括第一支撑件1、第二支撑件2以及柔性显示模组3；第一支撑件1具有相对设置的第一面11和第二面12；第二支撑件2与第一支撑件1之间设置有间隙8，第二支撑件2具有相对设置的第三面21和第四面22；柔性显示模组3设于第一支撑件1的第一面11和第二支撑件2的第三面21；其中，第一面11的靠近第二支撑件2的区域为第一配合面111，第三面21的靠近第一支撑件1的区域为第三配合面211，第一配合面111与第三配合面211对称设置，至少部分第一配合面111与柔性显示模组3之间距离随着与第二支撑件2的距离的减小而增大，至少部分第三配合面211与柔性显示模组3之间距离随着与第一支撑件1的距离的减小而增大，使显示装置内折时，柔性显示模组3与第一配合面111的至少部分和第三配合面211至少部分接触形成水滴形。
本示例实施方式的显示装置，至少部分第一配合面111与柔性显示模组3之间距离随着与第二支撑件2的距离的减小而增大，第一配合面111与第三配合面211对称设置，即至少部分第三配合面211与柔性显示模组3之间距离随着与第一支撑件1的距离的减小而增大；使显示装置内折时，柔性显示模组3与第一配合面111的至少部分和第三配合面211的至少部分接触形成水滴形；由于有第一配合面111和第三配合面211的支撑使柔性显示模组3形成的水滴形较为圆滑，不会形成折角，避免各个膜层的应力较大，从而避免胶材和功能层的失效，以适用于同时满足内折和外折条件的显示装置。
在本示例实施方式中，所谓“远离”、“靠近”指的是在显示装置处于展平状态时。长度方向为与显示装置的折弯方向垂直的方向，宽度方向为与长度方向垂直且与柔性显示模组3平行的方向。
在本示例实施方式中，第一支撑件1具有第一面11和第二面12，第一面11与第二面12相对设置。第二面12可以设置为平面，第一面11之上可以设置柔性显示模组3。第二支撑件2具有第三面21和第四面22，第三面21与第四面22相对设置。第四面22 可以设置为平面，第三面21之上可以设置柔性显示模组3。
第一支撑件1和第二支撑件2的结构可以完全相同；第二支撑件2与第一支撑件1之间设置有间隙8，且第一支撑件1和第二支撑件2对称设置，即第一面11与第三面21是对称的。
具体而言，第一面11的靠近所述第二支撑件2的区域为第一配合面111，第一配合面111可以包括粘接平面a、倾斜面b以及限位平面d。粘接平面a位于第一配合面111的远离折弯处的一端，限位平面d位于第一支撑件1的靠近折弯处的一端。限位平面d与粘接平面a平行设置，均平行于柔性显示模组3；粘接平面a之上通过粘接层5粘接有柔性显示模组3；在展平状态时，限位平面d与柔性显示模组3之间有间隔空间。
第三面21的靠近所述第一支撑件1的区域为第三配合面211，第三配合面211也可以包括粘接平面a、倾斜面b以及限位平面d。粘接平面a位于第三配合面211的远离折弯处的一端，限位平面d位于第二支撑件2的靠近折弯处的一端。限位平面d与粘接平面a平行设置，均平行于柔性显示模组3；粘接平面a之上通过粘接层5粘接有柔性显示模组3；在展平状态时，限位平面d与柔性显示模组3之间有间隔空间。
倾斜面b连接于粘接平面a和限位平面d之间。倾斜面b与粘接平面a之间圆滑过渡，且倾斜面b从粘接平面a到限位平面d向远离柔性显示模组3一侧倾斜，倾斜面b的倾斜角度α大约为15度，即倾斜面b与第二面12之间的夹角α大约为15度，也是倾斜面b与第四面22之间的夹角α大约为15度。当然，倾斜面b的倾斜角度α大于等于10度且小于等于20度都是可以的。
倾斜面b与限位平面d之间通过向柔性显示模组3突出的圆弧面c过渡，倾斜面b与圆弧面c的切面共面，即倾斜面b与限位平面d之间连接有圆弧面c，圆弧面c向柔性显示模组3突出，圆弧面c与倾斜面b相切，使弧面c与倾斜面b圆滑过渡。即圆弧面c处的第一支撑件1形成部分圆柱体，圆柱体的切面是通过圆柱的一条母线，且与过这条母线的轴截面互相垂直的平面。另外，在本发明的其他示例实施方式中，连接于倾斜面b与限位平面d之间的弧面c还可以是椭圆弧面c、抛物线弧面c等等，只要能够在显示装置内折时与柔性显示模组3接触使柔性显示模组3形成较为圆滑的水滴形即可。
在本示例实施方式中，参照图2所示，限位平面d的宽度L1大约为6mm±1mm，需要说明的是限位平面d的宽度L1大约为6mm±1mm表示的是限位平面d的宽度L1大于等于5mm(6mm-1mm)且小于等于7mm(6mm+1mm)，后续提及的各个数据都是表示一个区间值，而非点值；与权利要求中的数值范围是对应的。倾斜面b与限位平面d的宽度之和L2大约为14mm±1mm。显示装置内折后第一支撑件1和第二支撑件2之间的最小距离H1大约为2mm，实现内折形状为圆滑的水滴形，半径R1大约为3mm；参 照图3所示，显示装置外折后第一支撑件1和第二支撑件2之间的最大距离H2大约为10mm，实现外折形状为圆滑的“U”字形，半径R2大约为5mm。当然，还可以根据需要设置限位平面d的宽度以及倾斜面b的宽度。
在本示例实施方式中，粘接平面a向远离折弯处一侧延伸以支撑柔性显示模组3，由于，第一支撑件1和第二支撑件2的结构可以完全相同，因此，第一支撑件1的粘接平面a的延伸长度与第二支撑件2的粘接平面a的延伸长度相同。
当然，在本发明的其他示例实施方式中，可以将第一配合面111与第三配合面211形成与需要形成的圆滑的水滴形完全配合的形状，使得显示装置内折时，柔性显示模组3与第一配合面111和第三配合面211完全贴合以支撑柔性显示模组3。第一支撑件1和第二支撑件2的结构还可以不相同，例如，第一支撑件1的宽度和第二支撑件2的宽度可以不一致，即第一支撑件1的粘接平面a的延伸长度与第二支撑件2的粘接平面a的延伸长度不相同，使显示装置的折弯处不是位于中间位置；只要保证第一配合面111与第三配合面211对称设置即可保证形成圆滑对称的水滴形，避免内折时柔性显示模组3以及各功能层的受力不均导致的显示失效。
参照图4和图5所示，在第一支撑件1的外周还设置有第一边框61，第一边框61围绕第一支撑件1的除设置第一配合面111以外的其他三个边缘，且第一边框61的两端还突出于第一配合面111，第一边框61的突出于第一配合面111的两端一一对应的设置有两个第一固定轴，在第一固定轴上设置有第一齿轮13。
在第二支撑件2的外周还设置有第二边框62，第二边框62围绕第二支撑件2的除设置第三配合面211以外的其他三个边缘，且第二边框62的两端还突出于第三配合面211，第二边框62的突出于第三配合面211的两端一一对应的设置有两个第二固定轴，在第二固定轴上设置有第二齿轮23。
参照图4和图5所示，显示装置还包括两个连接部7，两个连接部7的结构相同，连接部7包括至少一个配合齿轮71，配合齿轮71设于第一齿轮13和第二齿轮23之间，并与第一齿轮13和第二齿轮23外啮合，使第一支撑件1和第二支撑件2都可以相对于连接部7进行转动以实现显示装置的内折或外折。
下面对柔性显示模组3的具体结构进行详细说明。
参照图6所示的柔性显示模组3一示例实施方式的结构示意图，柔性显示模组3可以包括：柔性支撑板31、保护层32、底片层33、第一胶层34、柔性显示面板35、第二胶层36、偏光片37、第三胶层38、第一盖板39、第四胶层40以及第二盖板41。柔性支撑板31粘接于部分第一面11和部分第三面21。保护层32设于柔性支撑板31的远离第一支撑件1和第二支撑件2的一侧；底片层33设于保护层32的远离柔性支撑板31的 一侧；第一胶层34设于底片层33的远离柔性支撑板31的一侧；柔性显示面板35设于第一胶层34的远离柔性支撑板31的一侧；第二胶层36设于柔性显示面板35的远离柔性支撑板31的一侧；偏光片37设于第二胶层36的远离柔性支撑板31的一侧；第三胶层38设于偏光片37的远离柔性支撑板31的一侧；第一盖板39设于第三胶层38的远离柔性支撑板31的一侧；第四胶层40设于第一盖板39的远离柔性支撑板31的一侧；第二盖板41设于第四胶层40的远离柔性支撑板31的一侧。
上面对柔性显示模组3的各膜层的位置关系进行了说明，下面对各膜层的厚度以及性能要求进行说明。
柔性支撑板31可以为金属支撑板，柔性支撑板31的厚度可以为150μm±10μm，等效弹性模量为10Kpa±2Kpa。柔性支撑板31为整个柔性显示模组3提供支撑力。
保护层32的材质可以是泡棉，保护层32能够保护底片层33，避免柔性支撑板31对底片层33的损伤，保护层32两侧均有胶层用于粘接柔性支撑板31和底片层33。
底片层33的材质可以为聚酰亚胺，底片层33的厚度可以是23μm±3μm，弹性模量可以为3.2GPa±0.5Gpa。底片层33的作用是对柔性显示面板35的支撑和保护。
第一胶层34的材质可以是OCA光学胶(Optically Clear Adhesive)，第一胶层34的厚度可以是15μm±3μm。在温度为25℃的情况下，其弹性模量为45KPa±10Kpa；在温度为-20℃的情况下，其弹性模量为130KPa±10Kpa；在温度为60℃的情况下，其弹性模量为40KPa±5KPa。第一胶层34用于粘接柔性显示面板35和底片层33。
OCA光学胶用于胶结透明光学元件(如镜头等)的特种粘胶剂。要求具有无色透明、光透过率在90％以上、胶结强度良好，可在室温或中温下固化，且有固化收缩小等特点；OCA光学胶就是具有光学透明的一层特种无基材的双面胶。
柔性显示面板35可以是OLED(OrganicElectroluminesence Display，有机发光半导体)显示面板或QLED(Quantum Dots Light Emitting Diode Display，量子点发光二极管)显示面板等等，柔性显示面板35可以是任何一种能够制作成柔性的显示面板，显示面板的具体结构在此处不再赘述。
第二胶层36的材质也可以是OCA光学胶，第二胶层36的厚度可以是15μm±5μm，在温度为25℃的情况下，其弹性模量为80KPa±10KPa；在温度为-20℃的情况下，其弹性模量为130KPa±10Kpa；在温度为65℃的情况下，其弹性模量为70KPa±10KPa。第二胶层36用于粘接柔性显示面板35和偏光片37。
偏光片37的厚度可以是45μm±5μm，其弹性模量为3.2GPa±0.5GPa。偏光片37的基本结构包括：最中间的PVA(聚乙烯醇)，两层TAC(三醋酸纤维素)，PSA film(压敏胶)，Release film(离型膜)和Protective film(保护膜)。其中，起到偏振作用的是 PVA层，但是PVA极易水解，为了保护偏光膜的物理特性，因此在PVA的两侧各复合一层具有高光透过率、耐水性好又有一定机械强度的(TAC)薄膜进行防护，这就形成了偏光片37原板。
第三胶层38的材质也可以是OCA光学胶，第三胶层38的厚度可以是50μm±5μm，在温度为25℃的情况下，其弹性模量为55KPa±10KPa；在温度为-20℃的情况下，其弹性模量为120KPa±10Kpa；在温度为60℃的情况下，其弹性模量为35KPa±5KPa。第三胶层38的固化率为68％±3％。第三胶层38用于粘接偏光片37和第一盖板39。
第一盖板39和第二盖板41的厚度可以均为85μm±5μm。第一盖板39和第二盖板41的材质可以为聚酰亚胺或聚酰亚胺和PET(Polyethylene terephthalate，聚对苯二甲酸类塑料)。第四胶层40用于粘接第一盖板39和第二盖板41。设置两层盖板(第一盖板39和第二盖板41)可以增加显示装置的耐刮擦和耐冲击性能，在显示装置外折时避免刮擦和冲击对各个功能层的损伤。
在本发明的第二示例实施方式中，在保持其他条件不变的基础上，可以对第三胶层38的厚度进行调整，具体地：第三胶层38的材质也可以是OCA光学胶，第二胶层36的厚度可以是100μm±10μm，在温度为25℃的情况下，其弹性模量为55KPa±10KPa；在温度为-20℃的情况下，其弹性模量为120KPa±10Kpa；在温度为60℃的情况下，其弹性模量为35KPa±5KPa。第三胶层38的固化率为68％±3％。
在本发明的第三示例实施方式中，在保持其他条件不变的基础上，可以对第三胶层38的弹性模量进行调整，具体地：第三胶层38的材质也可以是OCA光学胶，第二胶层36的厚度可以是50μm±5μm，在温度为25℃的情况下，其弹性模量为140KPa±10KPa。第三胶层38的固化率为68％±3％。
在本发明的第四示例实施方式中，在保持其他条件不变的基础上，可以对偏光片37的厚度进行调整，具体地：偏光片37的厚度可以是90μm±10μm，其弹性模量为3.2GPa±0.5GPa。
在本发明的第五示例实施方式中，在保持其他条件不变的基础上，可以对底片层33的弹性模量进行调整，具体地：底片层33的材质可以为聚酰亚胺，底片层33的厚度可以是23μm±3μm，弹性模量为9GPa±1Gpa。
上述示例实施方式中各个膜层是相互匹配的，是经过无数次的试验得到的。
参照图7所示的第二胶层36和第三胶层38的应变有限元仿真示意图，图中纵坐标为应变量；参照图8所示的柔性显示面板35的应变有限元仿真示意图，图中纵坐标为应变量。图中应变量都是在显示装置由内折状态变化为外折状态过程中的最大应变量。下面各数据的对比均是将各示例实施方式与第一示例实施方式进行对比。
从图中可以得到：在第一示例实施方式中，第二胶层36的应变大约为124％，第三胶层38的应变大约为136％，柔性显示面板35的应变大约为0.225％；柔性显示面板35、第二胶层36和第三胶层38的应变均较小。在第二示例实施方式中，第二胶层36的应变稍有降低，降低至大约122％；但是，第三胶层38的应变增大较多，增大至大约180％；柔性显示面板35的应变稍有增大，增大至大约0.23％。在第三示例实施方式中，第二胶层36的应变增大较多，增大至大约162％；第三胶层38的应变增大较多，增大至大约160％；柔性显示面板35的应变也增大较多，增大至大约0.42％。在第四示例实施方式中，第二胶层36的应变稍有增大，增大至大约148％；第三胶层38的应变稍有增大，增大至大约142％；柔性显示面板35的应变则稍有减小，减小至大约0.21％。在第五示例实施方式中，第二胶层36的应变基本保持不变；第三胶层38的应变稍有减小，减小至大约134％；柔性显示面板35的应变增大较多，增大至大约0.46％。
因此，从上述对比可以得到第一示例实施方式较优，第二和第四示例实施方式次之，第三和第五示例实施方式最次。但是，上述五个示例实施方式中各膜层的应变均比现有技术中对应膜层的应变要小，经过试验得到现有技术中的第二胶层36和第三胶层38的应变均大于200％，而柔性显示面板的应变均大于0.5％。
参照图9所示，在本发明的另一示例实施方式中，可以不设置第四胶层40和第二盖板41。
上述所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施方式中，如有可能，各实施例中所讨论的特征是可互换的。在上面的描述中，提供许多具体细节从而给出对本发明的实施方式的充分理解。然而，本领域技术人员将意识到，可以实践本发明的技术方案而没有所述特定细节中的一个或更多，或者可以采用其它的方法、组件、材料等。在其它情况下，不详细示出或描述公知结构、材料或者操作以避免模糊本发明的各方面。
本说明书中使用“约”“大约”的用语通常表示在一给定值或范围的20％之内，较佳是10％之内，且更佳是5％之内。在此给定的数量为大约的数量，意即在没有特定说明的情况下，仍可隐含“约”“大约”“大致”“大概”的含义。
虽然本说明书中使用相对性的用语，例如“上”“下”来描述图标的一个组件对于另一组件的相对关系，但是这些术语用于本说明书中仅出于方便，例如根据附图中所述的示例的方向。能理解的是，如果将图标的装置翻转使其上下颠倒，则所叙述在“上”的组件将会成为在“下”的组件。其他相对性的用语，例如“高”“低”“顶”“底”等也作具有类似含义。当某结构在其它结构“上”时，有可能是指某结构一体形成于其它结构上，或指某结构“直接”设置在其它结构上，或指某结构通过另一结构“间接”设置在其它结构上。
本说明书中，用语“一个”、“一”、“该”、“所述”和“至少一个”用以表示存在一个或多个要素/组成部分/等；用语“包含”、“包括”和“具有”用以表示开放式的包括在内的意思并且是指除了列出的要素/组成部分/等之外还可存在另外的要素/组成部分/等；用语“第一”、“第二”和“第三”等仅作为标记使用，不是对其对象的数量限制。
应可理解的是，本发明不将其应用限制到本说明书提出的部件的详细结构和布置方式。本发明能够具有其他实施方式，并且能够以多种方式实现并且执行。前述变形形式和修改形式落在本发明的范围内。应可理解的是，本说明书公开和限定的本发明延伸到文中和/或附图中提到或明显的两个或两个以上单独特征的所有可替代组合。所有这些不同的组合构成本发明的多个可替代方面。本说明书所述的实施方式说明了已知用于实现本发明的最佳方式，并且将使本领域技术人员能够利用本发明。

Claims (15)

  1. 一种显示装置，其中，包括：
    第一支撑件，具有相对设置的第一面和第二面；
    第二支撑件，与所述第一支撑件之间设置有间隙，所述第二支撑件具有相对设置的第三面和第四面；
    柔性显示模组，设于所述第一支撑件的第一面和所述第二支撑件的第三面；
    其中，所述第一面的靠近所述第二支撑件的区域为第一配合面，所述第三面的靠近所述第一支撑件的区域为第三配合面，所述第一配合面与所述第三配合面对称设置；至少部分所述第一配合面与所述柔性显示模组之间距离随着与所述第二支撑件的距离的减小而增大，至少部分所述第三配合面与所述柔性显示模组之间距离随着与所述第一支撑件的距离的减小而增大，使显示装置内折时，所述柔性显示模组与所述第一配合面的至少部分和所述第三配合面的至少部分接触形成水滴形。
  2. 根据权利要求1所述的显示装置，其中，所述第一配合面和所述第三配合面均包括：
    粘接平面，其上粘接所述柔性显示模组；
    倾斜面，与所述粘接平面连接，所述倾斜面与所述粘接平面之间圆滑过渡；
    限位平面，与所述倾斜面连接，所述限位平面与所述粘接平面平行设置；
    其中，所述倾斜面从粘接平面到限位平面向远离所述柔性显示模组一侧倾斜，所述倾斜面与所述限位平面之间通过向所述柔性显示模组突出的至少一个弧面过渡，且所述倾斜面与所述弧面的切面共面，使显示装置内折时，所述柔性显示模组与所述弧面以及限位平面接触形成水滴形。
  3. 根据权利要求2所述的显示装置，其中，所述倾斜面的倾斜角度大于等于10度且小于等于20度，所述限位平面的宽度大于等于5mm且小于等于7mm，所述限位平面与所述倾斜面的宽度之和大于等于13mm且小于等于15mm。
  4. 根据权利要求1所述的显示装置，其中，所述柔性显示模组包括：
    柔性支撑板，粘接于部分所述第一面和部分所述第三面；
    保护层，设于所述柔性支撑板的远离所述第一支撑件和所述第二支撑的一侧；
    底片层，设于所述保护层的远离所述柔性支撑板的一侧；
    第一胶层，设于所述底片层的远离所述柔性支撑板的一侧；
    柔性显示面板，设于所述第一胶层的远离所述柔性支撑板的一侧；
    第二胶层，设于所述柔性显示面板的远离所述柔性支撑板的一侧；
    偏光片，设于所述第二胶层的远离所述柔性支撑板的一侧；
    第三胶层，设于所述偏光片的远离所述柔性支撑板的一侧；
    第一盖板，设于所述第三胶层的远离所述柔性支撑板的一侧。
  5. 根据权利要求4所述的显示装置，其中，所述柔性支撑板的厚度大于等于140μm且小于等于160μm，等效弹性模量大于等于8Kpa且小于等于12Kpa。
  6. 根据权利要求5所述的显示装置，其中，所述第一胶层的材质为OCA光学胶，厚度大于等于12μm且小于等于18μm，在温度为25℃时，其弹性模量大于等于35KPa且小于等于55Kpa；在温度为-20℃时，其弹性模量大于等于120KPa且小于等于140Kpa；在温度为60℃时，其弹性模量大于等于35KPa且小于等于45KPa。
  7. 根据权利要求6所述的显示装置，其中，所述第二胶层的材质为OCA光学胶，厚度大于等于10μm且小于等于20μm，在温度为25℃时，其弹性模量大于等于70KPa且小于等于90KPa；在温度为-20℃时，其弹性模量大于等于120KPa且小于等于140Kpa；在温度为65℃时，其弹性模量大于等于60KPa且小于等于80KPa。
  8. 根据权利要求7所述的显示装置，其中，所述第一盖板的厚度大于等于80μm且小于等于90μm。
  9. 根据权利要求8所述的显示装置，其中，所述偏光片的厚度大于等于40μm且小于等于50μm，弹性模量大于等于2.7GPa且小于等于3.7GPa。
  10. 根据权利要求9所述的显示装置，其中，所述底片层的厚度大于等于20μm且小于等于26μm，弹性模量大于等于2.7GPa且小于等于3.7Gpa。
  11. 根据权利要求10所述的显示装置，其中，所述第三胶层的材质为OCA光学胶，固化率大于等于65％且小于等于71％，厚度大于等于45μm且小于等于55μm，在温度为25℃时，其弹性模量大于等于45KPa且小于等于65KPa；在温度为-20℃时，其弹性模量大于等于110KPa且小于等于130Kpa；在温度为60℃时，其弹性模量大于等于30KPa且小于等于40Kpa；或
    所述第三胶层的材质为OCA光学胶，固化率为大于等于65％且小于等于71％，厚度大于等于90μm且小于等于110μm，在温度为25℃时，其弹性模量大于等于45KPa且小于等于65KPa；在温度为-20℃时，其弹性模量大于等于110KPa且小于等于130Kpa；在温度为60℃时，其弹性模量大于等于30KPa且小于等于40KPa；或
    所述第三胶层的材质为OCA光学胶，固化率大于等于65％且小于等于71％， 厚度大于等于45μm且小于等于55μm，在温度为25℃时，其弹性模量且小于等于130KPa且小于等于150KPa。
  12. 根据权利要求9所述的显示装置，其中，所述底片层的厚度大于等于20μm且小于等于26μm，弹性模量大于等于8GPa且小于等于10Gpa；且所述第三胶层的材质为OCA光学胶，固化率大于等于65％且小于等于71％，厚度大于等于45μm且小于等于55μm，在温度为25℃时，其弹性模量大于等于45KPa且小于等于65KPa；在温度为-20℃时，其弹性模量大于等于110KPa且小于等于130Kpa；在温度为60℃时，其弹性模量大于等于30KPa且小于等于40Kpa。
  13. 根据权利要求8所述的显示装置，其中，所述偏光片的厚度大于等于80μm且小于等于100μm，弹性模量大于等于2.7GPa且小于等于3.7Gpa；且所述底片层的厚度大于等于20μm且小于等于26μm，弹性模量大于等于2.7GPa且小于等于3.7Gpa；且所述第三胶层的材质为OCA光学胶，固化率大于等于65％且小于等于71％，厚度大于等于45μm且小于等于55μm，在温度为25℃时，其弹性模量大于等于45KPa且小于等于65KPa；在温度为-20℃时，其弹性模量大于等于110KPa且小于等于130Kpa；在温度为60℃时，其弹性模量大于等于30KPa且小于等于40Kpa。
  14. 根据权利要求4～13任意一项所述的显示装置，其中，所述柔性显示模组还包括：
    第四胶层，设于所述第一盖板的远离所述柔性支撑板的一侧；
    第二盖板，设于所述第四胶层的远离所述柔性支撑板的一侧。
  15. 根据权利要求14所述的显示装置，其中，所述第二盖板的厚度大于等于80μm且小于等于90μm。
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