WO2022042063A1 - 柔性显示装置 - Google Patents

柔性显示装置 Download PDF

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Publication number
WO2022042063A1
WO2022042063A1 PCT/CN2021/105026 CN2021105026W WO2022042063A1 WO 2022042063 A1 WO2022042063 A1 WO 2022042063A1 CN 2021105026 W CN2021105026 W CN 2021105026W WO 2022042063 A1 WO2022042063 A1 WO 2022042063A1
Authority
WO
WIPO (PCT)
Prior art keywords
flexible display
rack
guide rail
display device
rod
Prior art date
Application number
PCT/CN2021/105026
Other languages
English (en)
French (fr)
Inventor
罗晓飞
祝尚杰
朱红
杨艳艳
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 US17/772,485 priority Critical patent/US12058825B2/en
Publication of WO2022042063A1 publication Critical patent/WO2022042063A1/zh

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    • 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
    • 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
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/0017—Casings, cabinets or drawers for electric apparatus with operator interface units
    • H05K5/0018—Casings, cabinets or drawers for electric apparatus with operator interface units having an electronic display

Definitions

  • the present disclosure relates to the field of display devices, and in particular, to a flexible display device.
  • a scroll-type flexible display device is a display device whose display screen can be rolled.
  • a roll-type flexible display device usually includes a support frame, a casing, a roll and a flexible display screen.
  • the housing includes a detachable first part and a second part, and the support frame is connected between the first part and the second part.
  • the scroll is inside the first part, the flexible display screen is wound on the scroll shaft, one end of the flexible display screen sticks out of the first part and is fixed on the second part, the first part and the second part are split, and the first part and the second part are pulled apart , the flexible display can be pulled out of the first part.
  • the support frame is also unfolded, which can provide support for the flexible display screen.
  • Embodiments of the present disclosure provide a flexible display device, including a support frame, a casing, a scroll, a flexible display screen, and a limiting mechanism;
  • the support frame includes a scissor frame
  • the housing includes a detachable first part and a second part, the first part is located at one end of the scissor frame, and the second part is located at the other end of the scissor frame;
  • the reel is located in the first part, one end of the flexible display screen is connected to the reel, and the other end of the flexible display screen is connected to the second part;
  • the limiting mechanism is connected with the scissors frame, and the limiting mechanism is provided on at least one part of the first part and the second part to limit the part where the limiting mechanism is located from the
  • the relative movement of the symmetry axis of the scissors frame, the symmetry axis of the scissors frame is the symmetry axis extending along the telescopic direction of the scissor frame.
  • the limiting mechanism includes a first rack, a second rack and a synchronizing gear
  • the length direction of the first rack is parallel to the axis of the reel, the first rack and the second rack are parallel, and the first rack is connected to a fork at the end of the scissor frame
  • the arm is hinged, and the second rack is hinged with another fork arm at the end of the scissor frame;
  • the synchronizing gear is located between the first rack and the second rack, and the synchronizing gear meshes with the first rack and the second rack, respectively.
  • the limiting mechanism further includes a guide rail, the first rack and the second rack are slidably installed on the guide rail, and the synchronizing gear is rotatably installed on the guide rail.
  • the first rack includes a connected first plate-shaped portion and a first rod-shaped portion, and one side of the first rod-shaped portion has teeth;
  • the second rack includes a connected second plate-shaped part and a second rod-shaped part, and one side of the second rod-shaped part has teeth;
  • Both the first plate-shaped portion and the second plate-shaped portion are connected to the guide rail and are spaced apart from each other in the length direction of the guide rail, and the first rod-shaped portion and the second rod-shaped portion are both Arranged along the length direction of the guide rail, and both are located between the first plate-shaped part and the second plate-shaped part, in the width direction of the guide rail, the first rod-shaped part and the first The two rod-shaped portions are spaced apart from each other.
  • the limiting mechanism includes one of the synchronizing gears, the synchronizing gears are located between the first rod-shaped portion and the second rod-shaped portion, the first rack and the second The racks are symmetrically arranged with respect to the center of the synchronizing gear; or, the limiting mechanism includes at least two synchronizing gears, and each synchronizing gear is located between the first rod-shaped portion and the second rod-shaped portion. and arranged in sequence along the length direction of the guide rail.
  • the scissors include a plurality of fork units that are hinged in sequence, and the fork units include two fork arms hinged to each other in the middle and a limit portion located at the hinge axis of the two fork arms,
  • the guide rail is provided with a limiting structure, and when the scissors are folded, the limiting structure cooperates with the limiting portion to limit the displacement of the hinge axes of the two fork arms in the axial direction of the reel .
  • the limiting structure includes two baffles, the two baffles are arranged on the side of the guide rail close to the scissor frame, and the two baffles are mutually in the length direction of the guide rail. When the scissors are folded, the limiting portion is located between the two baffles.
  • both the first part and the second part are provided with the limit mechanism, and along the direction of the hinge axis of the two fork arms, two blocks on one guide rail of the two limit mechanisms
  • the baffle is located on one side of the scissor frame, and the two baffles on the other guide rail of the two limiting mechanisms are located on the other side of the scissor frame.
  • elastic spacers are sandwiched between the fork arms that are hinged with each other, and the elastic spacer is located at the hinge of the fork arms.
  • a stepped portion is provided on the outer wall of the reel, and one end of the flexible display screen is located on a lower side of the stepped portion.
  • the cross section of the outer wall of the reel is a spiral.
  • the height difference of the step portion is the same as the thickness of the flexible display screen.
  • the flexible display screen includes a flexible cover plate, a first adhesive layer, a second adhesive layer and a flexible display module, the first adhesive layer, the second adhesive layer and the flexible display module.
  • the display module is located on the same side of the flexible cover plate, and the flexible display module is located between the first adhesive layer and the second adhesive layer, the first adhesive layer and the reel connected, the second adhesive layer is connected with the second part.
  • the flexible display device further includes two coil springs, the two coil springs are respectively located at two ends of the scroll shaft, and both the first part and the scroll shaft are connected to the coil springs.
  • the limit mechanism can limit the symmetry between the part where the limit mechanism is located and the scissors frame
  • the relative movement of the shaft prevents the flexible display screen from being skewed in the plane where the scissors are located, which is beneficial to prevent the flexible display screen from being rolled and dislocated.
  • FIG. 1 is a schematic diagram of a partial structure of a flexible display device in the related art
  • FIG. 2 is a schematic diagram of a partial structure of a flexible display device in the related art
  • FIG. 3 is a schematic diagram of an external structure of a flexible display device provided by an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of the flexible display device shown in FIG. 3;
  • FIG. 5 is a schematic partial structure diagram of a flexible display device provided by an embodiment of the present disclosure.
  • FIG. 6 is a schematic view of the state when the support frame of the flexible display device shown in FIG. 5 is folded;
  • Fig. 7 is the D-D sectional view in Fig. 6;
  • FIG. 8 is a cross-sectional view at D-D of another flexible display device provided by an embodiment of the present disclosure.
  • Fig. 9 is the partial structure schematic diagram in Fig. 6;
  • FIG. 10 is a partial structural schematic diagram of a scissor frame provided by an embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram of the internal structure of the first part of the housing provided by the embodiment of the present disclosure.
  • FIG. 12 is a cross-sectional view of a reel provided by an embodiment of the present disclosure.
  • FIG. 13 is a partial structural schematic diagram of a flexible display device provided by an embodiment of the present disclosure.
  • FIG. 1 is a schematic partial structure diagram of a flexible display device in the related art.
  • the flexible display device includes a support frame 100 , a casing 200 and a flexible display screen 400 .
  • the housing 200 includes a detachable first part 210 and a second part 220 , the flexible display screen is connected between the first part 210 and the second part 220 , and the flexible display screen can be rolled up to a reel in the first part 210 .
  • the support frame 100 includes a scissor frame 110 .
  • the scissors 110 includes a plurality of fork units 111 that are hinged in sequence, and each fork unit 111 includes two fork arms 1111 that are hinged to each other through a pin shaft 1112 .
  • the pin shaft 1112 of one fork frame unit 111 is hinged with the first part 210
  • the pin shaft 1112 of the other fork frame unit 111 is hinged with the second part 220 .
  • the scissor frame 110 is unfolded under the action of pulling force. Since both ends of the scissor frame 110 are connected with the first part 210 and the second part 220 through the pins 1112, both the first part 210 and the second part 220 can rotate relative to the scissor frame 110, as shown by the double-headed arrows in FIG. 1 . . This will cause the flexible display screen to be skewed, and it is easy to cause the flexible display screen to be rolled and dislocated during the process of winding the flexible display screen.
  • FIG. 2 is a schematic partial structure diagram of another flexible display device in the related art.
  • FIG. 2 schematically shows the structure of the connection between the first part 210 and the scissor frame 110 .
  • the first part 210 and the second part 220 are respectively provided with chute 200a, located in the two fork units 111 at both ends of the scissors 110, the two fork arms of one fork unit 111
  • the ends of 1111 are slidably arranged in the chute 200 a of the first part 210
  • the ends of the two fork arms 1111 of the other fork unit 111 are slidably arranged in the chute 200 a of the second part 220 .
  • the first part 210 and the second part 220 can translate relative to the scissors frame 110 along the axis of the reel on which the flexible display screen is wound, as shown by the double-headed arrow in FIG.
  • FIG. 3 is a schematic diagram of an external structure of a flexible display device provided by an embodiment of the present disclosure.
  • the flexible display device includes a casing 200 and a flexible display screen 400 .
  • the housing 200 includes a first portion 210 and a second portion 220 that are detachable.
  • the first part 210 and the second part 220 can move in a specified direction (for example, the direction of the double-headed arrow A in the figure) to achieve closing or separation, wherein the length directions of the first part 210 and the second part 220 are parallel,
  • the specified direction is perpendicular to the length direction.
  • FIG. 4 is a schematic structural diagram of the flexible display device shown in FIG. 3 .
  • a part of the outer wall of the first part 210 of the housing 200 is omitted in FIG. 4 in order to show the inside thereof, and the flexible display screen 400 is omitted.
  • the flexible display device further includes a support frame 100 , a scroll shaft 300 and a limiting mechanism 500 .
  • the reel 300 is located in the first part 210 , one end of the flexible display screen 400 is connected to the reel 300 , and the other end of the flexible display screen 400 is connected to the second part 220 .
  • FIG. 5 is a schematic partial structural diagram of a flexible display device provided by an embodiment of the present disclosure.
  • the figure shows the support frame 100 and the limiting mechanism 500 , and the first part 210 and the second part 220 of the housing 200 are indicated by a dotted frame.
  • the support frame 100 includes a scissor frame 110 .
  • the first part 210 is located at one end of the scissor frame 110
  • the second part 220 is located at the other end of the scissor frame 110 .
  • the limit mechanism 500 is connected with the scissors frame 110 , and the first part 210 and the second part 220 are provided with the limit mechanism 500 to limit the relative movement between the part where the limit mechanism 500 is located and the symmetry axis m of the scissors frame 110 .
  • the symmetry axis m of the scissor frame 110 is an axis of symmetry extending along the telescopic direction of the scissor frame 110 (eg, the telescopic direction is parallel to the aforementioned designated direction).
  • the symmetry axis m of the scissor frame 110 is also the connection line of the pin shafts 1112 in the middle of the two fork arms 1111 in each fork frame unit 111 in the scissor frame 110 .
  • the relative movement here includes rotation and translation.
  • the limit mechanism can limit the part where the limit mechanism is located and the scissors
  • the relative movement of the symmetrical axis of the frame prevents the flexible display screen from skewing in the plane where the scissor frame is located, which is beneficial to prevent the flexible display screen from being rolled and dislocated.
  • the first part 210 of the housing 200 may include a barrel 211 for accommodating the reel 300 and end caps 212 at both ends of the barrel 211 .
  • the end cover 212 is detachably connected to the cylinder body 211 to facilitate disassembly and maintenance of the structure inside the first part 210 of the housing 200 .
  • the PCB (English: Printed Circuit Board, Chinese: Printed Circuit Board) of the flexible display device may be located in the second part 220 of the housing 200 .
  • the scissors 110 includes a plurality of fork units 111 that are hinged in sequence.
  • the fork unit 111 includes two fork arms 1111 hinged to each other in the middle, and the two fork arms 1111 are hinged through a pin shaft 1112 .
  • the connected fork arms 1111 rotate around the pin shaft 1112 .
  • Only one of the first part 210 and the second part 220 of the housing 200 may be provided with the limiting mechanism 500 .
  • a limit mechanism 500 is provided on the first part 210 , and the limit mechanism 500 can limit the relative movement of the first part 210 and the symmetry axis m of the scissors frame 110 .
  • a limiting mechanism 500 is provided on the second part 220 , and the limiting mechanism 500 can limit the relative movement between the second part 220 and the symmetry axis m of the scissor frame 110 .
  • FIG. 6 is a schematic view of the state when the support frame of the flexible display device shown in FIG. 5 is folded.
  • the limiting mechanism 500 includes a first rack 510 , a second rack 520 and a synchronizing gear 530 .
  • the length direction of the first rack 510 (the direction indicated by the arrow B in FIG. 6 ) is parallel to the axis of the reel 300 , the first rack 510 and the second rack 520 are parallel, and the first rack 510 is parallel to the scissor frame 110
  • One fork arm 1111 at the end is hinged, and the second rack 520 is hinged with the other fork arm 1111 at the end of the scissor frame 110 .
  • the synchronizing gear 530 is located between the first rack 510 and the second rack 520, and the synchronizing gear 530 meshes with the first rack 510 and the second rack 520, respectively.
  • the synchronizing gear 530 makes the first rack 510 and the second rack 520 only move synchronously, so the scissor frame 110 is connected to the first gear After the bar 510 and the second rack 520, when the scissors 110 is extended and retracted, the movement amount of the two fork arms 1111 connected to the same limiting mechanism 500 is always kept equal.
  • the displacement of the second part 220 in the axial direction of the reel 300 is always 0, and neither the first part 210 nor the second part 220 can rotate relative to the scissors frame 110 , so the flexible display screen will not be skewed, and the flexible display screen will not be skewed when the flexible display screen is rolled up. The flexible display screen will not be rolled and dislocated during the process of the screen.
  • the limiting mechanism 500 includes two synchronizing gears 530 spaced apart from each other.
  • the first rack 510 and the second rack 520 are meshed with the two synchronizing gears 530 , which can make the movement of the first rack 510 and the second rack 520 more stable.
  • the limiting mechanism 500 may also include only one synchronizing gear 530 , and the first rack 510 and the second rack 520 may be arranged symmetrically with respect to the center of the one synchronizing gear 530 .
  • three or more synchronizing gears 530 may be included, and the first rack 510 and the second rack 520 are both engaged with each synchronizing gear 530 .
  • the limiting mechanism 500 includes two or more synchronizing gears 530, the diameters of the synchronizing gears 530 are the same, so as to ensure that the first rack 510 and the second rack 520 are parallel to each other. and the second rack 520 are capable of meshing with each of the synchronizing gears 530 .
  • the limiting mechanism 500 may further include a guide rail 540 .
  • the first rack 510 and the second rack 520 are slidably mounted on the guide rail 540 , and the synchronizing gear 530 is rotatably mounted on the guide rail 540 .
  • the first rack 510 , the second rack 520 and the synchronizing gear 530 can be mounted on the guide rail 540 and then integrally mounted on the first part 210 or the second part 220 to facilitate the installation of the limiting mechanism 500 .
  • the rotating shaft of the synchronizing gear 530 can be installed on the guide rail 540, so that the position of the synchronizing gear 530 is fixed relative to the guide rail 540, and can rotate around the rotating shaft.
  • the guide rail 540 may be fixed on the housing 200 by screws.
  • the structures of the first rack 510 and the second rack 520 may be the same.
  • the first rack 510 includes a connected first plate-shaped portion 511 and a first rod-shaped portion 512 .
  • the first rod-shaped portion 512 One side has teeth.
  • the second rack 520 includes a connected second plate-shaped part 521 and a second rod-shaped part 522, and one side of the second rod-shaped part 522 has teeth.
  • Both the first plate-shaped portion 511 and the second plate-shaped portion 521 are connected to the guide rail 540 and are spaced apart from each other in the length direction of the guide rail 540 .
  • Both the first rod-shaped part 512 and the second rod-shaped part 522 are arranged along the length direction of the guide rail 540 and are located between the first plate-shaped part 511 and the second plate-shaped part 521 .
  • the first rod-shaped portion 512 and the second rod-shaped portion 522 are spaced apart from each other in the width direction of the guide rail 540 .
  • the length direction of the guide rail 540 is the same as the length direction of the first rack 510, that is, the direction shown by the arrow B in FIG. 6, the width direction of the guide rail 540 is the direction shown by the arrow C in FIG.
  • the longitudinal direction of the guide rail 540 is vertical.
  • the synchronizing gear 530 may be located between the first rod-shaped portion 512 and the second rod-shaped portion 522 , and the first rack 510 and the second rack 520 are about the center of the synchronizing gear 530 Symmetrical arrangement.
  • each synchronizing gear 530 is located between the first rod-shaped portion 512 and the second rod-shaped portion 522 and arranged in sequence along the length direction of the guide rail 540 .
  • the teeth on the first rod-shaped part 512 and the teeth on the second rod-shaped part 522 mesh with each synchronizing gear 530 , so that the first rack 510 and the second rack 520 move more smoothly.
  • FIG. 7 is a D-D cross-sectional view in FIG. 6 .
  • the guide rail 540 may have a slideway 540 a extending along the length direction of the guide rail 540 , and both the first rack 510 and the second rack 520 are located outside the slideway 540 a.
  • One side wall of the slideway 540a has a bar-shaped opening 540c, the bar-shaped opening 540c extends along the slideway 540a, and the fork arm 1111 connected to the second rack 520 can be located in the bar-shaped opening 540c.
  • the end of the fork arm 1111 is connected with a pin shaft 1112 , the pin shaft 1112 is located in the slideway 540 a , and the fork arm 1111 and the second plate portion 521 of the second rack 520 are hinged through the pin shaft 1112 .
  • the fork arm 1111 connected to the second rack 520 can move along the bar opening 540c, and the pin 1112 can move along the slideway 540a, thereby driving the second rack 520 to move.
  • the guide rail 540 has a slideway 540a extending along the length direction of the guideway 540 , and the first rack 510 , the second rack 520 and the synchronizing gear 530 may all be located in the slideway 540a .
  • FIG. 8 is a cross-sectional view at D-D of another flexible display device provided by an embodiment of the present disclosure.
  • the slideway 540a has two opposite side walls, both of which have grooves 540b extending along the slideway 540a, and the second plate-shaped portions 521 of the second rack 520 are located on the two sides in the groove 540b on the wall, so that the second rack 520 can move along the slideway 540a.
  • One side of the second rod-shaped portion 522 may also be located in the groove 540b to improve stability.
  • a side wall of the groove 540b further has a bar-shaped opening 540c, the bar-shaped opening 540c also extends along the groove 540b, and the fork arm 1111 connected to the second rack 520 can be located in the bar-shaped opening 540c , the fork arm 1111 can be hinged with the second plate portion 521 of the second rack 520 through the pin shaft 1112 .
  • the fork arm 1111 connected to the second rack 520 can move along the bar-shaped opening 540c and drive the second rack 520 to move through the pin shaft 1112 .
  • the first rack 510 can also be mounted on the guide rail 540 in the same way.
  • FIG. 9 is a schematic diagram of a partial structure in FIG. 6 .
  • the limiting mechanism 500 may further include a cover plate 550 .
  • the cover plate 550 is detachably connected to the guide rail 540, and the cover plate 550 can be located in the middle of the guide rail 540 to prevent the synchronizing gear 530 from falling off the guide rail 540, and can align the first rod-shaped portion 512 of the first rack 510 and the first rod-shaped portion 512 of the first rack 510.
  • the second rod-shaped portion 522 of the second rack 520 provides a restriction to ensure that the first rack 510 and the second rack 520 and the synchronizing gear 530 are kept in a meshing state.
  • cover plate 550 can also prevent impurities such as dust and sand from entering the synchronizing gear. Between the gear 530 and the first rack 510 and the second rack 520 , the teeth on the synchronizing gear 530 , the first rod-shaped part 512 and the second rod-shaped part 522 are damaged.
  • the cover plate 550 may further have a through hole 550a, and the rotating shaft of the synchronizing gear 530 may be located in the through hole 550a, so that the synchronizing gear 530 is more stable.
  • the guide rail 540 may also have a limiting structure.
  • the fork unit 111 may include two fork arms 1111 hinged to each other in the middle, and a limit portion 1113 located at the hinge axis of the two fork arms 1111 .
  • the limiting structure cooperates with the limiting portion 1113 to limit the displacement of the hinge axes of the two fork arms 1111 in the axial direction of the reel 300 .
  • the scissors frame 110 is in the closed state. Due to the assembly gap and other reasons, the first part 210 and the second part 220 are easily displaced with each other in the axial direction of the reel 300, which may affect the flexibility of the spool 300. damage to the display.
  • the displacement of the hinge axes of the two fork arms 1111 in the axial direction of the reel 300 is restricted, that is, the pin shaft 1112 of the hinged two fork arms 1111 is restricted on the axis of the reel 300 .
  • the upward displacement is equivalent to restricting the first part 210 and the second part 220 to prevent the first part 210 and the second part 220 from shifting each other in the axial direction of the reel 300 .
  • the limiting structure includes two baffles 610 .
  • the two baffles 610 are arranged on the side of the guide rail 540 close to the scissor frame 110 , and the two baffles 610 are spaced from each other in the length direction of the guide rail 540 .
  • the limiting portion 1113 is located between the two baffles 610 . Since the two baffles 610 are spaced apart from each other in the length direction of the guide rail 540 , the space between the two baffles 610 constitutes a limiting slot 600 , and the limiting portion 1113 is clamped by the two baffles 610 to reach the limit. bit purpose.
  • the two baffles 610 on one guide rail 540 of the two limit mechanisms 500 are located on one side of the scissor frame 110 , and the other of the two limit mechanisms 500 .
  • Two baffles 610 on one guide rail 540 are located on the other side of the scissor frame 110 .
  • the two limiting mechanisms 500 limit positions from two sides of the scissor frame 110 respectively, so that the first part 210 and the second part 220 are more stable after being closed.
  • the limiting portion 1113 may include a portion of the pin shaft 1112 located outside the fork arm 1111 . Both ends of the pin shaft 1112 can be located outside the fork arm 1111. When the scissors 110 is folded, the end of the pin shaft 1112 enters the limit slot 600, and the pin shaft 1112 is clamped by the two baffles 610 to restrict the pin shaft 1112. Displacement of the shaft 1112 in the axial direction of the reel 300 .
  • the limiting portion 1113 may further include an end cap 11131 .
  • FIG. 10 is a partial structural schematic diagram of a scissors frame provided by an embodiment of the present disclosure. As shown in FIG. 10 , the end of the pin shaft 1112 is located outside the fork arm 1111 . Both ends of the pin shaft 1112 may be respectively connected with end caps 11131 . The diameter of the end caps 11131 is larger than the diameter of the pin shaft 1112 . The diameter of the pin shaft 1112 is usually small, and it is not easy to fit with the limiting groove 600 .
  • the end cap 11131 at at least one end of the pin shaft 1112 is detachably connected to the pin shaft 1112 , which facilitates the connection of the pin shaft 1112 and the fork arm 1111 .
  • the end cap 11131 is threaded with the pin 1112 .
  • the scissor frame 110 As shown in FIG. 10 , in the scissor frame 110 , elastic spacers 1114 are sandwiched between the fork arms 1111 that are hinged with each other, and the elastic spacers 1114 are located at the hinge joints of the fork arms 1111 .
  • the elastic washer 1114 is squeezed by the fork arm 1111, and maintains a certain amount of friction with the fork arm 1111.
  • the scissors frame 110 can expand and contract with the user's push and pull, and when the user stops applying force, the scissor frame 110 can act on the frictional force.
  • the lower part remains stationary, so that the interval between the first part 210 and the second part 220 remains unchanged.
  • the elastic gasket 1114 can be an annular rubber gasket or a sponge gasket, the elastic gasket 1114 is sleeved on the pin shaft 1112, and the two sides are respectively in contact with the two fork arms 1111 hinged to each other.
  • the friction force can be adjusted by adjusting the end cap 11131 .
  • the end cap 11131 and the pin 1112 are threadedly connected, then the end cap 11131 can be tightened to make the mutually hinged fork arms 1111 squeeze the elastic washer 1114, thereby increasing the frictional force, otherwise, loosening the end cap 11131 can make This frictional force is reduced.
  • FIG. 11 is a schematic diagram of the internal structure of the first part of the housing provided by the embodiment of the present disclosure. Part of the outer wall of the first part 210 is omitted from the figure.
  • the flexible display device further includes a coil spring (also called a torsion spring) 700 , and the first part 210 and the scroll shaft 300 are both connected with the coil spring 700 .
  • the coil spring 700 can provide a winding force, and the coil spring 700 is accommodated inside the first part 210.
  • the scroll shaft 300 rotates under the force of the coil spring 700, and the flexible display screen is rotated. 400 is received in the first part 210 and wound on the reel 300.
  • the coil spring 700 is usually a coiled sheet metal strip. Since the elastic force provided by the sheet metal strip is nearly constant after a certain number of turns, the coil spring 700 is used to provide the coiling force, which is beneficial to improve the retraction force. Stability of the roll process.
  • the flexible display device may include two coil springs 700 , and the two coil springs 700 are located at two ends of the scroll shaft 300 respectively.
  • the force of the scroll shaft 300 is more balanced, so that the flexible display screen 400 can be rolled into the flexible display screen 400 more smoothly.
  • FIG. 12 is a cross-sectional view of a reel provided by an embodiment of the present disclosure.
  • the outer wall of the reel 300 has a stepped portion 310 .
  • Providing the stepped portion 310 is beneficial to reduce the stress received when the flexible display screen 400 is rolled.
  • FIG. 13 is a partial structural schematic diagram of a flexible display device provided by an embodiment of the present disclosure. The figure shows the connection of the flexible display panel 400 to the reel 300 and the second part 220 of the housing 200 . As shown in FIG. 13 , one end of the flexible display screen 400 is located on the lower side of the stepped portion 310 .
  • the reel in the related art is not provided with the stepped portion 310, which causes a gap between the second turn and the first turn when winding the flexible display screen 400, which is the thickness of the flexible display screen 400, which will cause
  • the flexible display screen 400 has local stress concentration.
  • the stepped portion 310 the flexible display screen 400 can be smoothly wound on the reel 300 , avoiding the problem of local stress concentration during the winding process of the flexible display screen 400 , which is beneficial to prolong the service life of the flexible display screen 400 .
  • the cross section of the outer wall of the reel 300 is a spiral, and the cross section is perpendicular to the axis of the reel 300 .
  • the winding radius is gradually increased, and the cross section of the outer wall of the reel 300 is designed as a spiral, so that the flexible display screen 400 can be wound on the reel 300 more smoothly, further avoiding flexible display
  • the screen 400 exhibits localized stress concentrations.
  • the height difference H of the stepped portion 310 is the same as the thickness h of the flexible display screen 400 . In this way, when one end of the flexible display screen 400 is connected to the low side of the stepped portion 310 , the surface of the flexible display screen 400 can be flush with the high side of the stepped portion 310 , thereby further avoiding local stress concentration on the flexible display screen 400 .
  • the flexible display screen 400 includes a flexible cover plate 410 , a first adhesive layer 420 , a second adhesive layer 430 and a flexible display module 440 .
  • the first adhesive layer 420 , the second adhesive layer 430 and the flexible display module 440 are located on the same side of the flexible cover plate 410 , and the flexible display module 440 is located between the first adhesive layer 420 and the second adhesive layer 430 , the first adhesive layer 420 is connected with the reel 300 , and the second adhesive layer 430 is connected with the second part 220 .
  • the flexible cover plate 410 is connected to the reel 300 and the second part 220 , and the flexible cover plate 410 bears the main winding force, which reduces the force of the flexible display module 440 and is beneficial to prolong the service life of the flexible display module 440 .
  • the first adhesive layer 420 and the second adhesive layer 430 may be pressure-sensitive adhesives.
  • the thickness of the first adhesive layer 420 and the thickness of the second adhesive layer 430 are the same as the thicknesses of the flexible display module 440 , that is, when the flexible display screen 400 is unfolded, the first adhesive layer 420 , the second adhesive layer 430 and the flexible The surface of the display module 440 is flush.

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Abstract

一种柔性显示装置，属于显示设备领域。柔性显示装置包括支撑架（100）、壳体（200）、卷轴（300）、柔性显示屏（400）和限位机构（500）；支撑架（100）包括剪叉架（110）；壳体（200）包括第一部分（210）和第二部分（220），第一部分（210）位于剪叉架（110）的一端，第二部分（220）位于剪叉架（110）的另一端；限位机构（500）与剪叉架（110）相连，第一部分（210）和第二部分（220）中的至少一个部分上设有限位机构（500），以限制限位机构（500）所在的部分与剪叉架（110）的轴线的相对运动。在拉开第一部分（210）和第二部分（220）展开柔性显示屏（400），或是合拢第一部分（210）和第二部分（220），收卷柔性显示屏（400）的过程中，限位机构（500）可以限制限位机构（500）所在的部分与剪叉架（110）的轴线的相对运动，避免柔性显示屏（400）在剪叉架（110）所在平面内歪斜，利于防止柔性显示屏（400）收卷错位。

Description

柔性显示装置
本公开要求于2020年8月26日提交的申请号为202021815370.8、实用新型名称为“柔性显示装置”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
本公开涉及显示设备领域，特别涉及一种柔性显示装置。
背景技术
卷轴式的柔性显示装置是一种显示屏可以卷曲的显示装置。卷轴式的柔性显示装置通常包括支撑架、壳体、卷轴和柔性显示屏。壳体包括可以拆分的第一部分和第二部分，支撑架连接在第一部分和第二部分之间。卷轴位于第一部分内部，柔性显示屏卷绕在卷轴上，柔性显示屏的一端伸出第一部分并固定在第二部分上，拆分第一部分和第二部分，将第一部分和第二部分拉开，可以将柔性显示屏从第一部分中拉出。在拉开第一部分和第二部分的过程中，支撑架也展开，可以对柔性显示屏提供支撑。
实用新型内容
本公开实施例提供了一种柔性显示装置，包括支撑架、壳体、卷轴、柔性显示屏和限位机构；
所述支撑架包括剪叉架；
所述壳体包括可拆分的第一部分和第二部分，所述第一部分位于所述剪叉架的一端，所述第二部分位于所述剪叉架的另一端；
所述卷轴位于所述第一部分内，所述柔性显示屏的一端与所述卷轴相连，所述柔性显示屏的另一端与所述第二部分相连；
所述限位机构与所述剪叉架相连，所述第一部分和所述第二部分中的至少一个部分上设有所述限位机构，以限制所述限位机构所在的部分与所述剪叉架 的对称轴的相对运动，所述剪叉架的对称轴为沿所述剪叉架的伸缩方向延伸的对称轴。
可选地，所述限位机构包括第一齿条、第二齿条和同步齿轮；
所述第一齿条的长度方向平行于所述卷轴的轴线，所述第一齿条和所述第二齿条平行，所述第一齿条与所述剪叉架端部的一根叉臂铰接，所述第二齿条与所述剪叉架端部的另一根叉臂铰接；
所述同步齿轮位于所述第一齿条和所述第二齿条之间，且所述同步齿轮分别与所述第一齿条和所述第二齿条啮合。
可选地，所述限位机构还包括导轨，所述第一齿条、所述第二齿条可滑动地安装在所述导轨上，所述同步齿轮可自转地安装在所述导轨上。
可选地，所述第一齿条包括相连的第一板状部和第一杆状部，所述第一杆状部的一侧具有齿；
所述第二齿条包括相连的第二板状部和第二杆状部，所述第二杆状部的一侧具有齿；
所述第一板状部和所述第二板状部均与所述导轨相连，且在所述导轨的长度方向上相互间隔，所述第一杆状部和所述第二杆状部均沿所述导轨的长度方向布置，且均位于所述第一板状部和所述第二板状部之间，在所述导轨的宽度方向上，所述第一杆状部和所述第二杆状部相互间隔。
可选地，所述限位机构包括一个所述同步齿轮，所述同步齿轮位于所述第一杆状部和所述第二杆状部之间，所述第一齿条和所述第二齿条关于所述同步齿轮中心对称布置；或者，所述限位机构包括至少两个所述同步齿轮，各所述同步齿轮均位于所述第一杆状部和所述第二杆状部之间，且沿所述导轨的长度方向依次排列。
可选地，所述剪叉架包括依次铰接的多个叉架单元，所述叉架单元包括中部相互铰接的两根叉臂和位于所述两根叉臂的铰接轴线处的限位部，
所述导轨上具有限位结构，所述剪叉架收拢时，所述限位结构与所述限位部配合以限制所述两根叉臂的铰接轴线在所述卷轴的轴向上的位移。
可选地，所述限位结构包括两块挡板，所述两块挡板设置在所述导轨靠近所述剪叉架一侧，所述两块挡板在所述导轨的长度方向上相互间隔，所述剪叉架收拢时，所述限位部位于所述两块挡板之间。
可选地，所述第一部分和所述第二部分均设有所述限位机构，沿所述两根叉臂的铰接轴线的方向，两个所述限位机构中一个导轨上的两块挡板位于所述剪叉架的一侧，两个所述限位机构中另一个导轨上的两块挡板位于所述剪叉架的另一侧。
可选地，所述剪叉架中，相互铰接的叉臂之间夹有弹性垫片，所述弹性垫片位于所述叉臂的铰接处。
可选地，所述卷轴的外壁上具有台阶部，所述柔性显示屏的一端位于所述台阶部的低侧。
可选地，所述卷轴外壁的横截面为螺旋线。
可选地，所述台阶部的高度差与所述柔性显示屏的厚度相同。
可选地，所述柔性显示屏包括柔性盖板、第一粘接层、第二粘接层和柔性显示模组，所述第一粘接层、所述第二粘接层和所述柔性显示模组位于所述柔性盖板的同一面，且所述柔性显示模组位于所述第一粘接层、所述第二粘接层之间，所述第一粘接层与所述卷轴相连，所述第二粘接层与所述第二部分相连。
可选地，所述柔性显示装置还包括两个卷簧，所述两个卷簧分别位于所述卷轴的两端，所述第一部分和所述卷轴均与所述卷簧相连。
本公开实施例提供的技术方案带来的有益效果至少包括：
在拉开第一部分和第二部分展开柔性显示屏，或是合拢第一部分和第二部分，收卷柔性显示屏的过程中，限位机构可以限制限位机构所在的部分与剪叉架的对称轴的相对运动，避免柔性显示屏在剪叉架所在平面内歪斜，利于防止柔性显示屏收卷错位。
附图说明
为了更清楚地说明本公开实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是相关技术中的一种柔性显示装置的局部结构示意图；
图2是相关技术中的一种柔性显示装置的局部结构示意图；
图3是本公开实施例提供的一种柔性显示装置的外部结构示意图；
图4是图3所示柔性显示装置的结构示意图；
图5是本公开实施例提供的一种柔性显示装置的局部结构示意图；
图6是图5所示柔性显示装置的支撑架收拢时的状态示意图；
图7是图6中的D-D截面图；
图8是本公开实施例提供的另一种柔性显示装置在D-D处的截面图；
图9是图6中的局部结构示意图；
图10是本公开实施例提供的一种剪叉架的局部结构示意图；
图11是本公开实施例提供的壳体的第一部分的内部结构示意图；
图12是本公开实施例提供的一种卷轴的截面图；
图13是本公开实施例提供的柔性显示装置的局部结构示意图。
具体实施方式
为使本公开的目的、技术方案和优点更加清楚，下面将结合附图对本公开实施方式作进一步地详细描述。
图1是相关技术中的一种柔性显示装置的局部结构示意图。如图1所示，该柔性显示装置包括支撑架100、壳体200和柔性显示屏400。壳体200包括可拆分的第一部分210和第二部分220，柔性显示屏连接在第一部分210和第二部分220之间，柔性显示屏可以收卷至第一部分210内的卷轴上。
该支撑架100包括剪叉架110。剪叉架110包括依次铰接的多个叉架单元111，每个叉架单元111包括通过销轴1112相互铰接的两根叉臂1111。
位于剪叉架110两端的两个叉架单元111中，一个叉架单元111的销轴1112与第一部分210铰接，另一个叉架单元111的销轴1112与第二部分220铰接。拆分第一部分210和第二部分220后，将第一部分210和第二部分220拉开时，剪叉架110在拉力作用下展开。由于剪叉架110两端通过销轴1112与第一部分210和第二部分220连接，因此第一部分210和第二部分220均可以相对剪叉架110发生转动，如图1中的双向箭头所示。这会导致柔性显示屏出现歪斜，在收卷柔性显示屏的过程中容易引起柔性显示屏收卷错位。
图2是相关技术中的另一种柔性显示装置的局部结构示意图。图2中示意性地示出了第一部分210与剪叉架110的连接处的结构。在图2所示显示装置 中，第一部分210和第二部分220上分别设置有滑槽200a，位于剪叉架110两端的两个叉架单元111中，一个叉架单元111的两根叉臂1111的端部滑动设置在第一部分210的滑槽200a中，另一个叉架单元111的两根叉臂1111的端部滑动设置在第二部分220的滑槽200a中。第一部分210和第二部分220可以相对剪叉架110沿卷绕柔性显示屏的卷轴的轴向发生平移，如图2中的双向箭头所示，也容易导致柔性显示屏出现歪斜，在收卷柔性显示屏的过程中容易引起柔性显示屏收卷错位，甚至导致柔性显示屏破损。
图3是本公开实施例提供的一种柔性显示装置的外部结构示意图。如图3所示，该柔性显示装置包括壳体200和柔性显示屏400。壳体200包括可拆分的第一部分210和第二部分220。例如图3中，第一部分210和第二部分220可以沿指定方向运动(例如图中双向箭头A的方向)，以实现合拢或分离，其中，第一部分210和第二部分220的长度方向平行，该指定方向垂直于该长度方向。
图4是图3所示柔性显示装置的结构示意图。图4中略去了壳体200的第一部分210的部分外壁，以便于显示其内部，并略去了柔性显示屏400。如图4所示，该柔性显示装置还包括支撑架100、卷轴300和限位机构500。
卷轴300位于第一部分210内，柔性显示屏400的一端与卷轴300相连，柔性显示屏400的另一端与第二部分220相连。
图5是本公开实施例提供的一种柔性显示装置的局部结构示意图。图中示出了支撑架100和限位机构500，并以虚线框示意了壳体200的第一部分210和第二部分220。如图5所示，支撑架100包括剪叉架110。
第一部分210位于剪叉架110的一端，第二部分220位于剪叉架110的另一端。
限位机构500与剪叉架110相连，第一部分210和第二部分220上设有限位机构500，以限制限位机构500所在的部分与剪叉架110的对称轴m的相对运动。
剪叉架110的对称轴m为沿剪叉架110的伸缩方向(例如该伸缩方向与前述指定方向平行)延伸的对称轴。
剪叉架110的对称轴m也是剪叉架110中，各叉架单元111内铰接两根叉臂1111中部的销轴1112的连线。
示例性地，结合图1和图2，这里的相对运动包括转动和平动。
在拉开第一部分和第二部分，以展开柔性显示屏，或是合拢第一部分和第二部分，以收卷柔性显示屏的过程中，限位机构可以限制限位机构所在的部分与剪叉架的对称轴的相对运动，避免柔性显示屏在剪叉架所在平面内歪斜，利于防止柔性显示屏收卷错位。
如图3所示，壳体200的第一部分210可以包括容纳卷轴300的筒体211和位于筒体211两端的端盖212。端盖212与筒体211可拆卸连接，以方便对壳体200的第一部分210内部的结构进行拆解和维修。
柔性显示装置的PCB(英文：Printed Circuit Board，中文：印刷电路板)可以位于壳体200的第二部分220中。
如图5所示，剪叉架110包括依次铰接的多个叉架单元111，叉架单元111包括中部相互铰接的两根叉臂1111，两根叉臂1111通过销轴1112铰接。在剪叉架110伸缩的过程中，相连的叉臂1111绕销轴1112转动。
壳体200的第一部分210和第二部分220中也可以只有一个设置有限位机构500。例如第一部分210上设置有限位机构500，该限位机构500可以限制第一部分210与剪叉架110的对称轴m的相对运动。第二部分220上设置有限位机构500，该限位机构500可以限制第二部分220与剪叉架110的对称轴m的相对运动。
图6是图5所示柔性显示装置的支撑架收拢时的状态示意图。如图6所示，该限位机构500包括第一齿条510、第二齿条520和同步齿轮530。
第一齿条510的长度方向(如图6中的箭头B所示方向)平行于卷轴300的轴线，第一齿条510和第二齿条520平行，第一齿条510与剪叉架110端部的一根叉臂1111铰接，第二齿条520与剪叉架110端部的另一根叉臂1111铰接。
同步齿轮530位于第一齿条510和第二齿条520之间，且同步齿轮530分别与第一齿条510和第二齿条520啮合。
由于第一齿条510和第二齿条520均与同步齿轮530啮合，同步齿轮530使得第一齿条510和第二齿条520只能同步运动，因此将剪叉架110连接到第一齿条510和第二齿条520后，剪叉架110在伸缩时，与同一个限位机构500连接的两根叉臂1111的移动量始终保持相等，剪叉架110整体相对于第一部分210和第二部分220在卷轴300轴向上的位移始终为0，并且第一部分210和第 二部分220也均无法相对剪叉架110转动，因此不会导致柔性显示屏出现歪斜，在收卷柔性显示屏的过程中不会引起柔性显示屏收卷错位。
如图6所示，限位机构500包括相互间隔的两个同步齿轮530。同一限位机构500中，第一齿条510和第二齿条520均与两个同步齿轮530啮合，可以使第一齿条510和第二齿条520的移动更加平稳。
在其他实施例中，限位机构500也可以仅包括一个同步齿轮530，第一齿条510和第二齿条520可以关于这一个同步齿轮530中心对称布置。或者也可以包括相互间隔的三个或三个以上的同步齿轮530，第一齿条510和第二齿条520均与每一个同步齿轮530啮合。
若限位机构500包括两个或两个以上的同步齿轮530，则各同步齿轮530的直径相同，以确保在第一齿条510和第二齿条520平行的情况下，第一齿条510和第二齿条520均能够与每个同步齿轮530啮合。
如图6所示，限位机构500还可以包括导轨540。
第一齿条510、第二齿条520可滑动地安装在导轨540上，同步齿轮530可自转地安装在导轨540上。可以将第一齿条510、第二齿条520和同步齿轮530安装在导轨540上，然后再整体安装到第一部分210或第二部分220上，方便限位机构500的安装。示例性地，同步齿轮530的转轴可以安装在导轨540上，使同步齿轮530的位置相对导轨540固定，并且可以绕转轴自转。
示例性地，导轨540可以通过螺钉固定在壳体200上。
第一齿条510和第二齿条520的结构可以相同，如图6所示，第一齿条510包括相连的第一板状部511和第一杆状部512，第一杆状部512的一侧具有齿。第二齿条520包括相连的第二板状部521和第二杆状部522，第二杆状部522的一侧具有齿。
第一板状部511和第二板状部521均与导轨540相连，且在导轨540的长度方向上相互间隔。第一杆状部512和第二杆状部522均沿导轨540的长度方向布置，且均位于第一板状部511和第二板状部521之间。在导轨540的宽度方向上，第一杆状部512和第二杆状部522相互间隔。导轨540的长度方向与第一齿条510的长度方向相同，即也是图6中箭头B所示的方向，导轨540的宽度方向即图6中箭头C所示的方向，导轨540的宽度方向与导轨540的长度方向垂直。
若限位机构500包括一个同步齿轮530，该同步齿轮530可以位于第一杆状部512和第二杆状部522之间，第一齿条510和第二齿条520关于该同步齿轮530中心对称布置。
若限位机构500包括两个或两个以上的同步齿轮530，各同步齿轮530均位于第一杆状部512和第二杆状部522之间，且沿导轨540的长度方向依次排列。第一杆状部512上的齿和第二杆状部522上的齿均与每个同步齿轮530相啮合，使第一齿条510、第二齿条520移动更加平稳。
第一齿条510和第二齿条520可以采用相同的方式与导轨540连接。在本公开实施例的一种实现方式中，图7是图6中的D-D截面图。如图7所示，导轨540可以具有沿导轨540的长度方向延伸的滑道540a，第一齿条510、第二齿条520均位于滑道540a外。滑道540a的一侧壁上具有条形开口540c，条形开口540c沿滑道540a延伸，与第二齿条520相连的叉臂1111可以位于该条形开口540c中。该叉臂1111的端部连接有销轴1112，该销轴1112位于滑道540a中，叉臂1111和第二齿条520的第二板状部521通过该销轴1112铰接。
在剪叉架110伸缩时，与第二齿条520相连的叉臂1111就可以沿着条形开口540c移动，销轴1112可以沿着滑道540a移动，从而带动第二齿条520移动。
在本公开实施例的另一种实现方式中，导轨540具有沿导轨540的长度方向延伸的滑道540a，第一齿条510、第二齿条520和同步齿轮530均可以位于滑道540a中。图8是本公开实施例提供的另一种柔性显示装置在D-D处的截面图。如图8所示，滑道540a具有相对的两个侧壁，两个侧壁上均具有沿滑道540a延伸的凹槽540b，第二齿条520的第二板状部521位于两个侧壁上的凹槽540b中，这样使得第二齿条520可以沿着滑道540a移动。第二杆状部522的一侧也可以位于凹槽540b中，以提高稳定性。
如图8所示，凹槽540b的一侧壁上还具有条形开口540c，条形开口540c也沿凹槽540b延伸，与第二齿条520相连的叉臂1111可以位于该条形开口540c中，叉臂1111可以与第二齿条520的第二板状部521通过销轴1112铰接。在剪叉架110伸缩时，与第二齿条520相连的叉臂1111就可以沿着条形开口540c移动，并通过销轴1112带动第二齿条520移动。
以上仅以第二齿条520为例，第一齿条510也可以同样的方式安装在导轨540上。
图9是图6中的局部结构示意图。如图9所示，限位机构500还可以包括盖板550。盖板550可拆卸地连接在导轨540上，盖板550可以位于导轨540的中部，以防止同步齿轮530从导轨540上脱落，并且可以对第一齿条510的第一杆状部512和第二齿条520的第二杆状部522提供限制，确保第一齿条510和第二齿条520与同步齿轮530保持啮合状态，此外盖板550还可以避免粉尘、沙粒等杂质进入到同步齿轮530与第一齿条510、第二齿条520之间，引起同步齿轮530、第一杆状部512和第二杆状部522上的齿的损坏。
盖板550上还可以具有通孔550a，同步齿轮530的转轴可以位于该通孔550a中，使同步齿轮530更稳定。
可选地，导轨540上还可以具有限位结构。叉架单元111可以包括中部相互铰接的两根叉臂1111和位于两根叉臂1111的铰接轴线处的限位部1113。剪叉架110收拢时，限位结构与限位部1113配合以限制两根叉臂1111的铰接轴线在卷轴300的轴向上的位移。
第一部分210和第二部分220合拢之后，剪叉架110处于收拢的状态，由于装配间隙等原因，第一部分210和第二部分220在卷轴300的轴向上容易相互错动，有可能对柔性显示屏造成损伤。通过限位结构与限位部1113的配合，限制两根叉臂1111的铰接轴线在卷轴300的轴向上的位移，也即限制了铰接两根叉臂1111的销轴1112在卷轴300的轴向上的位移，相当于对第一部分210和第二部分220进行了限制，避免第一部分210和第二部分220在卷轴300的轴向上相互错动。
如图9所示，限位结构包括两块挡板610，两块挡板610设置在导轨540靠近剪叉架110一侧，两块挡板610在导轨540的长度方向上相互间隔，剪叉架110收拢时，限位部1113位于两块挡板610之间。由于两块挡板610在导轨540的长度方向上相互间隔，因此两块挡板610之间的空间构成了一个限位槽600，通过两块挡板610夹持住限位部1113，达到限位的目的。
可选地，沿两根叉臂1111的铰接轴线的方向，两个限位机构500中一个导轨540上的两块挡板610位于剪叉架110的一侧，两个限位机构500中另一个导轨540上的两块挡板610位于剪叉架110的另一侧。两个限位机构500分别从剪叉架110的两侧进行限位，使第一部分210和第二部分220合拢后更稳定。
可选地，限位部1113可以包括销轴1112位于叉臂1111外的部分。销轴1112的两端均可以位于叉臂1111外，剪叉架110收拢时，销轴1112的端部进入到限位槽600中，由两块挡板610夹持住销轴1112，限制销轴1112在卷轴300的轴向上的位移。
限位部1113还可以包括端帽11131。图10是本公开实施例提供的一种剪叉架的局部结构示意图。如图10所示，销轴1112的端部位于叉臂1111外。销轴1112的两端可以分别连接有端帽11131，端帽11131的直径大于销轴1112的直径，剪叉架110收拢时，端帽11131位于限位槽600中。销轴1112的直径通常较小，不易于与限位槽600配合，通过设置端帽11131，相当于增大了销轴1112的直径，有利于与限位槽600进行配合。
销轴1112至少一端的端帽11131与销轴1112可拆卸连接，方便销轴1112与叉臂1111进行连接。示例性地，端帽11131与销轴1112螺纹连接。
如图10所示，剪叉架110中，相互铰接的叉臂1111之间夹有弹性垫片1114，弹性垫片1114位于叉臂1111的铰接处。弹性垫片1114受到叉臂1111的挤压，与叉臂1111之间保持有一定大小的摩擦力，通过调整这一摩擦力的大小，使得使用者在拉开第一部分210和第二部分220的过程中或是合拢第一部分210和第二部分220的过程中，剪叉架110可以随着使用者的推拉伸缩，在使用者停止施力时，剪叉架110又可以在该摩擦力的作用下保持不动，使第一部分210和第二部分220之间的间隔保持不变。
示例性地，弹性垫片1114可以是环形的橡胶垫或是海绵垫，弹性垫片1114套在销轴1112上，两面分别与相互铰接的两个叉臂1111接触。
可以通过调整端帽11131，以调节该摩擦力的大小。例如端帽11131与销轴1112螺纹连接，则可以通过拧紧端帽11131，使相互铰接的叉臂1111挤压弹性垫片1114，从而使该摩擦力增大，反之拧松端帽11131就可以使该摩擦力减小。
图11是本公开实施例提供的壳体的第一部分的内部结构示意图。图中略去了第一部分210的部分外壁。如图11所示，柔性显示装置还包括卷簧(也称扭簧)700，第一部分210和卷轴300均与卷簧700相连。卷簧700可以提供收卷力，卷簧700容纳于第一部分210内部，在合拢第一部分210和第二部分220的过程中，卷轴300在卷簧700的作用力下发生旋转，将柔性显示屏400收入第一部分210中，并卷绕在卷轴300上。此外，卷簧700通常是卷绕的片状金 属条，由于在片状金属条卷绕一定的圈数后，所提供的弹力接近恒定，因此采用卷簧700提供收卷力，有利于提升收卷过程的稳定性。
可选地，该柔性显示装置可以包括两个卷簧700，两个卷簧700分别位于卷轴300的两端。通过在卷轴300的两端都设置卷簧700，使卷轴300的受力更加平衡，从而能够更平稳的卷入柔性显示屏400。
图12是本公开实施例提供的一种卷轴的截面图。如图12所示，卷轴300的外壁上具有台阶部310。设置台阶部310有利于减小柔性显示屏400卷绕时受到的应力。图13是本公开实施例提供的柔性显示装置的局部结构示意图。图中示出了柔性显示面板400与卷轴300、壳体200的第二部分220的连接。如图13所示，柔性显示屏400的一端位于台阶部310的低侧。相关技术中的卷轴未设置台阶部310，这使得在卷绕柔性显示屏400时，第二圈与第一圈之间存在一个断差，该断差即是柔性显示屏400的厚度，会引起柔性显示屏400局部应力集中。通过设置台阶部310，使得柔性显示屏400能够平滑卷绕于卷轴300上，避免柔性显示屏400卷绕过程中出现局部应力集中的问题，有利于延长柔性显示屏400的使用寿命。
如图13所示，卷轴300外壁的横截面为螺旋线，该横截面垂直于卷轴300的轴线。柔性显示屏400在卷绕时，卷绕半径是逐渐增大的，将卷轴300外壁的横截面设计为螺旋线，能够使柔性显示屏400更平滑的卷绕在卷轴300上，进一步避免柔性显示屏400出现局部应力集中。
如图13所示，台阶部310的高度差H与柔性显示屏400的厚度h相同。这样柔性显示屏400的一端连接至台阶部310的低侧时，柔性显示屏400的表面可以与台阶部310的高侧平齐，以此进一步避免柔性显示屏400出现局部应力集中。
如图13所示，该柔性显示屏400包括柔性盖板410、第一粘接层420、第二粘接层430和柔性显示模组440。第一粘接层420、第二粘接层430和柔性显示模组440位于柔性盖板410的同一面，且柔性显示模组440位于第一粘接层420、第二粘接层430之间，第一粘接层420与卷轴300相连，第二粘接层430与第二部分220相连。通过柔性盖板410与卷轴300和第二部分220进行连接，由柔性盖板410承受主要的收卷力，降低柔性显示模组440的受力，有利于延长柔性显示模组440的使用寿命。
示例性地，第一粘接层420和第二粘接层430可以为压敏胶。第一粘接层420的厚度和第二粘接层430的厚度与柔性显示模组440的厚度相同，即柔性显示屏400展开时，第一粘接层420、第二粘接层430和柔性显示模组440的表面是平齐的。
以上所述仅为本公开的可选实施例，并不用以限制本公开，凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (14)

  1. 一种柔性显示装置，包括支撑架(100)、壳体(200)、卷轴(300)、柔性显示屏(400)和限位机构(500)；
    所述支撑架(100)包括剪叉架(110)；
    所述壳体(200)包括可拆分的第一部分(210)和第二部分(220)，所述第一部分(210)位于所述剪叉架(110)的一端，所述第二部分(220)位于所述剪叉架(110)的另一端；
    所述卷轴(300)位于所述第一部分(210)内，所述柔性显示屏(400)的一端与所述卷轴(300)相连，所述柔性显示屏(400)的另一端与所述第二部分(220)相连；
    所述限位机构(500)与所述剪叉架(110)相连，所述第一部分(210)和所述第二部分(220)中的至少一个部分上设有所述限位机构(500)，以限制所述限位机构(500)所在的部分与所述剪叉架(110)的对称轴(m)的相对运动，所述剪叉架(110)的对称轴(m)为沿所述剪叉架(110)的伸缩方向延伸的对称轴。
  2. 根据权利要求1所述的柔性显示装置，其中，所述限位机构(500)包括第一齿条(510)、第二齿条(520)和同步齿轮(530)；
    所述第一齿条(510)的长度方向平行于所述卷轴(300)的轴线，所述第一齿条(510)和所述第二齿条(520)平行，所述第一齿条(510)与所述剪叉架(110)端部的一根叉臂(1111)铰接，所述第二齿条(520)与所述剪叉架(110)端部的另一根叉臂(1111)铰接；
    所述同步齿轮(530)位于所述第一齿条(510)和所述第二齿条(520)之间，且所述同步齿轮(530)分别与所述第一齿条(510)和所述第二齿条(520)啮合。
  3. 根据权利要求2所述的柔性显示装置，其中，所述限位机构(500)还包括导轨(540)，所述第一齿条(510)、所述第二齿条(520)可滑动地安装在所述导轨(540)上，所述同步齿轮(530)可自转地安装在所述导轨(540)上。
  4. 根据权利要求3所述的柔性显示装置，其中，
    所述第一齿条(510)包括相连的第一板状部(511)和第一杆状部(512)，所述第一杆状部(512)的一侧具有齿；
    所述第二齿条(520)包括相连的第二板状部(521)和第二杆状部(522)，所述第二杆状部(522)的一侧具有齿；
    所述第一板状部(511)和所述第二板状部(521)均与所述导轨(540)相连，且在所述导轨(540)的长度方向上相互间隔，所述第一杆状部(512)和所述第二杆状部(522)均沿所述导轨(540)的长度方向布置，且均位于所述第一板状部(511)和所述第二板状部(521)之间，在所述导轨(540)的宽度方向上，所述第一杆状部(512)和所述第二杆状部(522)相互间隔。
  5. 根据权利要求4所述的柔性显示装置，其中，所述限位机构(500)包括一个所述同步齿轮(530)，所述同步齿轮(530)位于所述第一杆状部(512)和所述第二杆状部(522)之间，所述第一齿条(510)和所述第二齿条(520)关于所述同步齿轮(530)中心对称布置；或者，
    所述限位机构(500)包括至少两个所述同步齿轮(530)，各所述同步齿轮(530)均位于所述第一杆状部(512)和所述第二杆状部(522)之间，且沿所述导轨(540)的长度方向依次排列。
  6. 根据权利要求3～5任一项所述的柔性显示装置，其中，所述剪叉架(110)包括依次铰接的多个叉架单元(111)，所述叉架单元(111)包括中部相互铰接的两根叉臂(1111)和位于所述两根叉臂(1111)的铰接轴线处的限位部(1113)，
    所述导轨(540)上具有限位结构，所述剪叉架(110)收拢时，所述限位结构与所述限位部(1113)配合以限制所述两根叉臂(1111)的铰接轴线在所述卷轴(300)的轴向上的位移。
  7. 根据权利要求6所述的柔性显示装置，其中，所述限位结构包括两块挡板(610)，所述两块挡板(610)设置在所述导轨(540)靠近所述剪叉架(110)一侧，所述两块挡板(610)在所述导轨(540)的长度方向上相互间隔，所述 剪叉架(110)收拢时，所述限位部(1113)位于所述两块挡板(610)之间。
  8. 根据权利要求7所述的柔性显示装置，其中，所述第一部分(210)和所述第二部分(220)均设有所述限位机构(500)，沿所述两根叉臂(1111)的铰接轴线的方向，两个所述限位机构(500)中一个导轨(540)上的两块挡板(610)位于所述剪叉架(110)的一侧，两个所述限位机构(500)中另一个导轨(540)上的两块挡板(610)位于所述剪叉架(110)的另一侧。
  9. 根据权利要求1～5任一项或7～8任一项所述的柔性显示装置，其中，所述剪叉架(110)中，相互铰接的叉臂(1111)之间夹有弹性垫片(1114)，所述弹性垫片(1114)位于所述叉臂(1111)的铰接处。
  10. 根据权利要求1～5任一项或7～8任一项所述的柔性显示装置，其中，所述卷轴(300)的外壁上具有台阶部(310)，所述柔性显示屏(400)的一端位于所述台阶部(310)的低侧。
  11. 根据权利要求10所述的柔性显示装置，其中，所述卷轴(300)外壁的横截面为螺旋线。
  12. 根据权利要求10所述的柔性显示装置，其中，所述台阶部(310)的高度差与所述柔性显示屏(400)的厚度相同。
  13. 根据权利要求12所述的柔性显示装置，其中，所述柔性显示屏(400)包括柔性盖板(410)、第一粘接层(420)、第二粘接层(430)和柔性显示模组(440)，所述第一粘接层(420)、所述第二粘接层(430)和所述柔性显示模组(440)位于所述柔性盖板(410)的同一面，且所述柔性显示模组(440)位于所述第一粘接层(420)、所述第二粘接层(430)之间，所述第一粘接层(420)与所述卷轴(300)相连，所述第二粘接层(430)与所述第二部分(220)相连。
  14. 根据权利要求1～5任一项或7～8任一项或11～13任一项所述的柔性显示装置，其中，所述柔性显示装置还包括两个卷簧(700)，所述两个卷簧(700)分别位于所述卷轴(300)的两端，所述第一部分(210)和所述卷轴(300)均与所述卷簧(700)相连。
PCT/CN2021/105026 2020-08-26 2021-07-07 柔性显示装置 WO2022042063A1 (zh)

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