WO2021237822A1 - 可折叠显示装置 - Google Patents

可折叠显示装置 Download PDF

Info

Publication number
WO2021237822A1
WO2021237822A1 PCT/CN2020/096350 CN2020096350W WO2021237822A1 WO 2021237822 A1 WO2021237822 A1 WO 2021237822A1 CN 2020096350 W CN2020096350 W CN 2020096350W WO 2021237822 A1 WO2021237822 A1 WO 2021237822A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
display device
arc
foldable display
rotation center
Prior art date
Application number
PCT/CN2020/096350
Other languages
English (en)
French (fr)
Inventor
冯子康
Original Assignee
武汉华星光电半导体显示技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 武汉华星光电半导体显示技术有限公司 filed Critical 武汉华星光电半导体显示技术有限公司
Priority to US16/966,023 priority Critical patent/US11917778B2/en
Publication of WO2021237822A1 publication Critical patent/WO2021237822A1/zh

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • 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
    • H05K5/0226—Hinges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • 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
    • 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
    • G06F1/1675—Miscellaneous details related to the relative movement between the different enclosures or enclosure parts
    • G06F1/1681—Details related solely to hinges
    • 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
    • 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
    • H05K5/0021—Side-by-side or stacked arrangements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/311—Flexible OLED

Definitions

  • This application relates to the field of foldable display technology, and in particular to a foldable display device.
  • foldable display devices have become a major development direction of the display industry, and the screen of the foldable display device is subjected to stress during the bending process, which may cause the risk of failure of the screen during the bending process.
  • the purpose of the present application is to provide a foldable display device to reduce the problem of screen failure caused by stress during the bending process of the foldable display device.
  • the present application provides a foldable display device, wherein the foldable display device includes a first housing, a second housing, and a flexible display panel,
  • the first housing and the second housing are used to support the flexible display panel, the first housing is opposed to the second housing, and the first housing rotates around a first rotation center , The second housing rotates around the second center of rotation;
  • the foldable display device when the foldable display device is in a flat state, it is located at an intermediate position between the first housing and the second housing and is perpendicular to where the first housing and the second housing are located.
  • the straight line of the plane is the y-coordinate axis, and when the foldable display device is in the flat state, the surface of the first housing and the second housing close to the flexible display panel is located on the same horizontal plane and intersects with each other.
  • the intersection point of the x-coordinate axis and the y-coordinate axis is the coordinate origin o
  • the x-coordinate axis, the y-coordinate axis The axis and the coordinate origin o constitute an xoy coordinate plane
  • the coordinates of the orthographic projection of the first rotation center on the xoy coordinate plane are (x1, y1)
  • the second rotation center is on the positive side of the xoy coordinate plane.
  • the coordinates of the projection are (-x1, y1);
  • the sum of the x1 and the y1 is a predetermined value, the x1 is greater than 0, the y1 is greater than -0.3 mm and less than or equal to 1 mm, and the predetermined value is greater than 0 mm and less than or equal to 2.5 mm.
  • the y1 is greater than or equal to -0.1 mm.
  • the y1 is less than or equal to 0.5 mm.
  • the y1 is greater than or equal to -0.1 mm and less than or equal to 0.3 mm.
  • the x1 is 1.9 mm, and the y1 is 0.1 mm.
  • the flexible display panel includes an organic light-emitting diode array layer, and the organic light-emitting diode array layer reaches the first housing and the second housing when the foldable display device is in a flat state.
  • the distance between the second housing and the surface of the flexible display panel is greater than or equal to 0.1 mm and less than or equal to 0.3 mm.
  • the first rotation center and the second rotation center are located on a side of the lower surface of the organic light emitting diode array layer close to the first housing and the second housing, and the first rotation center and the The distance from the second rotation center to the lower surface of the organic light emitting diode array layer is greater than or equal to 0 mm and less than or equal to 0.243 mm, or,
  • the first rotation center and the second rotation center are located on a side of the lower surface of the organic light emitting diode array layer away from the first housing and the second housing, and the first rotation
  • the distance from the center and the second rotation center to the lower surface of the organic light emitting diode array layer is greater than 0 mm and less than or equal to 0.157 mm, and the lower surface of the organic light emitting diode array layer is the organic light emitting diode array
  • the layer is close to the surfaces of the first housing and the second housing.
  • the radius of the rotation of the first housing around the first rotation center is 1 mm-10 mm
  • the radius of the rotation of the second housing around the second rotation center is 1 mm-10 mm
  • the foldable display device includes a dual-axis rotation mechanism
  • the dual-axis rotation mechanism includes a A first moving arm in the center, a second moving arm with a second center of rotation, a first fixed chute block with a first arc-shaped groove, and a second fixed chute block with a second arc-shaped groove
  • the first moving arm includes a first connecting piece and a first arc-shaped piece connected to one end of the first connecting piece, and one end of the first connecting piece of the first moving arm away from the first arc-shaped piece is fixed
  • the first arc-shaped piece of the first moving arm is clamped into the first arc-shaped groove of the first fixed sliding groove block, and the first arc is The shaped piece is matched with the first arc-shaped groove;
  • the second moving arm includes a second connecting piece and a second arc-shaped piece connected to one end of the second connecting piece, and one end of the second connecting piece of the second moving arm away from the second arc-shaped piece is fixed
  • the second arc-shaped piece of the second moving arm is clamped into the second arc-shaped groove of the second fixed sliding groove block, and the second The arc-shaped piece is matched with the second arc-shaped groove.
  • a foldable display device includes a first housing, a second housing, and a flexible display panel
  • the first housing and the second housing are used to support the flexible display panel, the first housing is opposed to the second housing, and the first housing rotates around a first rotation center , The second housing rotates around the second center of rotation;
  • the foldable display device when the foldable display device is in a flat state, it is located at an intermediate position between the first housing and the second housing and is perpendicular to where the first housing and the second housing are located.
  • the straight line of the plane is the y-coordinate axis, and when the foldable display device is in the flat state, the surface of the first housing and the second housing close to the flexible display panel is located on the same horizontal plane and intersects with each other.
  • the intersection point of the x-coordinate axis and the y-coordinate axis is the coordinate origin o
  • the x-coordinate axis, the y-coordinate axis The axis and the coordinate origin o constitute an xoy coordinate plane
  • the coordinates of the orthographic projection of the first rotation center on the xoy coordinate plane are (x1, y1)
  • the second rotation center is on the positive side of the xoy coordinate plane.
  • the coordinates of the projection are (-x1, y1);
  • the sum of the x1 and the y1 is a predetermined value, the x1 is greater than 0, the y1 is greater than -0.3 millimeters and less than or equal to 1 millimeter, and the predetermined value is greater than zero.
  • the y1 is greater than or equal to -0.1 mm.
  • the y1 is less than or equal to 0.5 mm.
  • the y1 is greater than or equal to -0.1 mm and less than or equal to 0.3 mm.
  • the predetermined value is 0.5 mm-3 mm.
  • the x1 is 1.9 mm, and the y1 is 0.1 mm.
  • the flexible display panel includes an organic light-emitting diode array layer, and the organic light-emitting diode array layer reaches the first housing and the second housing when the foldable display device is in a flat state.
  • the distance between the second housing and the surface of the flexible display panel is greater than or equal to 0.1 mm and less than or equal to 0.3 mm.
  • the first rotation center and the second rotation center are located on a side of the lower surface of the organic light emitting diode array layer close to the first housing and the second housing, and the first rotation center and the The distance from the second rotation center to the lower surface of the organic light emitting diode array layer is greater than or equal to 0 mm and less than or equal to 0.243 mm, or,
  • the first rotation center and the second rotation center are located on a side of the lower surface of the organic light emitting diode array layer away from the first housing and the second housing, and the first rotation
  • the distance from the center and the second rotation center to the lower surface of the organic light emitting diode array layer is greater than 0 mm and less than or equal to 0.157 mm, and the lower surface of the organic light emitting diode array layer is the organic light emitting diode array
  • the layer is close to the surfaces of the first housing and the second housing.
  • the radius of the rotation of the first housing around the first rotation center is 1 mm-10 mm
  • the radius of the rotation of the second housing around the second rotation center is 1 mm-10 mm
  • the foldable display device includes a dual-axis rotation mechanism, and the dual-axis rotation mechanism includes a first rotation center The first motion arm, the second motion arm with the second center of rotation, the first fixed chute block with the first arc-shaped groove, and the second fixed chute block with the second arc-shaped groove,
  • the first moving arm includes a first connecting piece and a first arc-shaped piece connected to one end of the first connecting piece, and one end of the first connecting piece of the first moving arm away from the first arc-shaped piece is fixed
  • the first arc-shaped piece of the first moving arm is clamped into the first arc-shaped groove of the first fixed sliding groove block, and the first arc is The shaped piece is matched with the first arc-shaped groove;
  • the second moving arm includes a second connecting piece and a second arc-shaped piece connected to one end of the second connecting piece, and one end of the second connecting piece of the second moving arm away from the second arc-shaped piece is fixed
  • the second arc-shaped piece of the second moving arm is clamped into the second arc-shaped groove of the second fixed sliding groove block, and the second The arc-shaped piece is matched with the second arc-shaped groove.
  • the foldable display device further includes a linkage mechanism and a third casing, the third casing being disposed between the first casing and the second casing, the The first fixed chute block and the second fixed chute block are fixed in the third housing, and the linkage mechanism includes a first transmission assembly, a second transmission assembly and a gear,
  • the first transmission assembly includes a first rack and a first sliding block arranged on a first arc-shaped member, the first rack having a first end surface and a second end surface perpendicular to the first end surface, The first end surface has flat teeth arranged along the transmission direction, the second end surface is provided with a first sliding groove, and the first sliding block on the first arc-shaped member is clamped to the first A sliding groove, the first rack is arranged on the first guide surface of the first fixed sliding groove block;
  • the second transmission assembly includes a second rack and a second sliding block arranged on the second arc-shaped member, the second rack having a third end surface and a fourth end surface perpendicular to the third end surface, The third end surface is provided with flat teeth arranged along the transmission direction, the fourth end surface is provided with a second sliding groove, and the second sliding block on the second arc-shaped member is clamped to the The second sliding groove, the second rack is arranged on the second guide surface of the second fixed sliding groove block;
  • the gear is rotatably connected to the third housing, the flat teeth arranged along the transmission direction of the first rack mesh with the gear, and the flat teeth arranged along the transmission direction of the second rack Engage with the gear.
  • the present application provides a foldable display device.
  • the foldable display device includes a first housing, a second housing, and a flexible display panel.
  • the first housing and the second housing are used to support the flexible display panel.
  • the casing is opposed to the second casing.
  • the first casing rotates around the first rotation center, and the second casing rotates around the second rotation center.
  • the coordinates of the orthographic projection of the first rotation center on the xoy coordinate plane are (x1, y1 ), the coordinates of the orthographic projection of the second rotation center on the xoy coordinate plane are (-x1, y1), the sum of x1 and y1 is a predetermined value, x1 is greater than 0, y1 is greater than -0.3 mm and less than or equal to 1 mm, to
  • the normal stress of the interface between the organic light emitting diode array layer and the encapsulation layer in the flexible display panel is less than 0.6281MPa, and the shear stress inside the encapsulation layer is less than 582.6MPa, which prevents the thin film encapsulation layer from cracking and organic Peeling occurs between the light-emitting diode array layer and the thin film packaging layer to avoid peeling or breaking of the film layer of the flexible display panel during the bending process of the foldable display device.
  • FIG. 1 is a schematic cross-sectional view of a foldable display device in an unfolded state according to an embodiment of the application
  • FIG. 2 is a schematic cross-sectional view of the foldable display device of the embodiment of the application when it is bent at 90 degrees;
  • FIG. 3 is a schematic cross-sectional view of the foldable display device in a fully bent state according to an embodiment of the application;
  • FIG. 4 is an exploded schematic diagram of a foldable display device according to an embodiment of the application.
  • Fig. 5 is a schematic diagram of the dual-axis rotation mechanism and the linkage mechanism in Fig. 4;
  • FIG. 6 is a schematic diagram of the rotation process of the first movement arm and the second movement arm of the dual-axis rotation mechanism shown in FIG. 5 during the bending process of the foldable display device;
  • FIG. 7 is a schematic cross-sectional view of the flexible display module shown in FIG. 4;
  • FIG. 8 is a schematic cross-sectional view of the flexible display panel shown in FIG. 7;
  • FIG. 10 is a schematic diagram of the normal stress between the organic light emitting diode array layer and the thin film encapsulation layer changing with time during the bending process of the flexible display device when the predetermined value R is 2 mm and x1 and y1 have different values;
  • FIG. 11 is a schematic diagram showing the change of the shear stress in the thin film packaging layer with time during the bending process of the flexible display device when the predetermined value R is 2 mm and x1 and y1 are different values;
  • FIG. 12 is a schematic diagram of the folded shape of the flexible display module when the predetermined value R is 2 mm and the same time is different (x1, y1).
  • 100 foldable display device 301 first housing; 301a first support plane; 301b first housing cavity; 302 second housing; 302a second support plane; 302b second housing cavity; 303 third housing; 303a accommodating cavity; 20 flexible display module; 201 rear cover; 202 flexible display panel; 2021 flexible substrate; 2022 organic light emitting diode array layer; 2023 thin film packaging layer; 203 polarizer; 204 protective cover; 40 biaxial O1 first rotation center; O2 second rotation center; 401 first movement arm; 4011 first connection piece; 4012 first arc-shaped piece; 402 second movement arm; 4021 second connection piece; Two arc-shaped pieces; 403 first fixed chute block; 403a first arc-shaped groove; 403b first guide surface; 404 second fixed chute block; 404a second arc-shaped groove; 404b second guide surface; 50 linkage mechanism; 501 first transmission assembly; 5011 first rack; 5011a first end surface; 5011b second end surface; 5012 first sliding block; 502 second transmission assembly; 5021 second rack
  • Figure 1 is a schematic cross-sectional view of the foldable display device according to the embodiment of the application when it is in a flat state
  • Figure 2 is a schematic cross-sectional view of the foldable display device according to the embodiment of the application when it is bent at 90 degrees
  • 3 is a schematic cross-sectional view of the foldable display device in a fully bent state according to an embodiment of the application
  • FIG. 4 is an exploded schematic diagram of the foldable display device according to an embodiment of the application
  • FIG. 5 is a dual-axis rotation mechanism and linkage in FIG. The schematic diagram of the mechanism.
  • FIG. 6 is a schematic diagram of the process of the first moving arm and the second moving arm of the dual-axis rotation mechanism shown in FIG. 5 during the bending process of the foldable display device.
  • the foldable display device 100 includes a first housing 301, a second housing 302, a third housing 303, a flexible display module 20, a dual-axis rotation mechanism 40, and a linkage mechanism 50.
  • the first housing 301 and the second housing 302 are used to support the flexible display module 20.
  • the first housing 301 has a first supporting plane 301a.
  • the second housing 302 has a second supporting plane 302a.
  • the second housing 302 is opposite to the first housing 301.
  • the first housing 301 rotates around the first rotation center O1, and the second housing 302 rotates around the second rotation center O2.
  • the first housing 301 and the second housing 302 rotate synchronously and symmetrically.
  • An end of the first housing 301 close to the second housing 302 has a first accommodating cavity 301b.
  • An end of the second housing 302 close to the first housing 301 has a second accommodating cavity 302b.
  • the third casing 303 is used for accommodating and fixing the biaxial rotation mechanism 40 and for accommodating the linkage mechanism 50.
  • the third housing 303 is a housing having a accommodating cavity 303a.
  • the third housing 303 is disposed between the first housing 301 and the second housing 302.
  • the dual-axis rotation mechanism 40 includes a first movement arm 401 with a first rotation center O1, a second movement arm 402 with a second rotation center O2, a first fixed slide block 403 with a first arc-shaped groove 403a, and A second fixed chute block 404 having a second arc-shaped groove 404a.
  • the first moving arm 401 and the second moving arm 402 rotate synchronously and symmetrically.
  • the first moving arm 401 is connected with the first housing 301 to rotate the first housing 301 around the first rotation center O1.
  • the first moving arm 401 includes a first connecting piece 4011 and a first arc-shaped piece 4012 connected to one end of the first connecting piece 4011.
  • the end of the first connecting piece 4011 of the first moving arm 401 away from the first arc-shaped piece 4012 is fixed in the first housing 301, and the first arc-shaped piece 4012 of the first moving arm 401 is clamped to the first fixed slide.
  • the first arc-shaped member 4012 is matched with the first arc-shaped groove 403a.
  • the first connecting member 4011 of the first moving arm 401 is fixed on the inner wall surrounding the first accommodating cavity 301b.
  • the second moving arm 402 is connected to the second housing 302 to make the second housing 302 rotate around the second rotation center O2.
  • the second moving arm 402 includes a second connecting member 4021 and a second arc-shaped member 4022 connected to one end of the second connecting member 4021.
  • the end of the second connecting member 4021 of the second moving arm 402 away from the second arc-shaped member 4022 is fixed in the second casing 302, and the second arc-shaped member 4022 of the second moving arm 402 is snapped into the second fixed slide.
  • the second arc-shaped member 4022 is matched with the second arc-shaped groove 404a.
  • the second connecting member 4021 of the second moving arm 402 is fixed on the inner wall surrounding the second accommodating cavity 302b.
  • the second connecting member 4021 is the same as the first connecting member 4011, and both are plate-shaped.
  • the second arc-shaped member 4022 is the same as the first arc-shaped member 4012.
  • the first arc-shaped groove 403 a of the first fixed chute block 403 is the same as the second arc-shaped groove 404 a of the second fixed chute block 404.
  • the first fixed chute block 403 and the second fixed chute block 404 are both fixed in the third housing 303.
  • the linkage mechanism 50 is used for synchronously and symmetrically rotating the first moving arm 401 and the second moving arm 402.
  • the linkage mechanism 50 includes a first transmission component 501, a second transmission component 502 and a gear 503.
  • the gear 503 is pin-connected to the third housing 303 so that the gear 503 can rotate freely.
  • the first transmission assembly 501 includes a first rack 5011 and a first sliding block 5012 disposed on the first arc-shaped member 4012.
  • the first rack 5011 has a first end surface 5011a and a second end surface perpendicular to the first end surface 5011a 5011b, the first end surface 5011a is provided with flat teeth arranged along the transmission direction, and the second end surface 5011b is provided with a first sliding groove.
  • the first sliding block 5012 on the first arc-shaped member 4012 is locked in the first sliding groove of the first rack 5011.
  • the flat teeth of the first rack 5011 arranged along the transmission direction mesh with the gear 503.
  • the first sliding block 5012 is matched with the first sliding groove of the first rack 5011.
  • the first slider 5012 is cylindrical.
  • the first rack 5011 is disposed on the first guide surface 403b of the first fixed sliding groove block 403.
  • the second transmission assembly 502 includes a second rack 5021 and a second slider 5022 disposed on the second arc-shaped member 4022.
  • the second rack 5021 has a third end surface 5021a and a fourth end surface perpendicular to the third end surface 5021a 5021b, the third end surface 5021a is provided with flat teeth arranged along the transmission direction, and the fourth end surface 5021b is provided with a second sliding groove.
  • the second sliding block 5022 on the second arc-shaped member 4022 is locked in the second sliding groove of the second rack 5021.
  • the flat teeth of the second rack 5021 arranged along the transmission direction mesh with the gear 503.
  • the second sliding block 5022 is matched with the second sliding groove of the second rack 5021, and the second sliding block 5022 is cylindrical.
  • the gear 503 drivingly connects the first rack 5011 and the second rack 5021.
  • the second rack 5021 is disposed on the second guide surface 404 b of the second fixed sliding groove block 404.
  • the first moving arm 401 drives the first housing 301 to rotate 45 degrees counterclockwise, and the second moving arm 402 drives the second housing 302 to rotate 45 degrees clockwise.
  • the foldable display device forms a symmetrical relationship as a whole, which prevents the flexible display module from bending into an asymmetrical shape when the foldable display device rotates on one side of the casing while the other side of the casing does not rotate at the same angle, resulting in greater stress .
  • the first moving arm 401 continues to rotate along the first rotation center O1, and the second moving arm 402 will rotate at the same angle accordingly.
  • the flexible display module 20 includes a rear cover 201, a flexible display panel 202, a polarizer 203 and a protective cover 204.
  • the rear cover 201, the flexible display panel 202, the polarizer 203, and the protective cover 204 are sequentially stacked.
  • the rear cover 201 is disposed close to the first casing 301 and the second casing 302.
  • the rear cover 201 is used to protect the back surface of the light-emitting surface of the flexible display panel 202.
  • the back cover 201 and the flexible display panel 202 are connected by a transparent adhesive layer.
  • the polarizer 203 is used to improve the contrast of the flexible display panel 202 during display.
  • the polarizer 203 and the flexible display panel 202 are connected by a transparent adhesive layer.
  • the protective cover 204 is used to protect the polarizer 203 and the flexible display panel 202.
  • the flexible display panel 202 includes a flexible substrate 2021, an organic light emitting diode array layer 2022, a thin film encapsulation layer 2023.
  • the thin film encapsulation layer 2023 includes an organic insulating layer and an inorganic insulating layer.
  • the preparation material of the inorganic insulating layer is selected from silicon nitride or silicon oxide.
  • the preparation material of the organic insulating layer is selected from polyacrylate and the like.
  • the flexible substrate 2021 is a polyimide layer.
  • the organic light emitting diode array layer 2022 includes a plurality of organic light emitting diodes arranged in an array.
  • the types of failure of the flexible display panel during the folding process include peeling between the thin film packaging layer 2023 and the organic light emitting diode array layer 2022 and the thin film packaging layer 2023 breaking.
  • the peeling between the thin film packaging layer 2023 and the organic light emitting diode array layer 2022 is due to the normal stress F1 at the interface between the thin film packaging layer 2023 and the organic light emitting diode array layer 2022.
  • the fracture of the thin film encapsulation layer 2023 is due to the shear stress F2 in the thin film encapsulation layer 2023.
  • FIG. 9 it is a schematic diagram of the orthographic projection of the first rotation center and the second rotation center on the xoy coordinate plane.
  • the foldable display device 100 When the foldable display device 100 is in the flat state, it is located in the middle position between the first housing 301 and the second housing 302 and perpendicular to the plane of the first housing 301 and the second housing 302 as the y-coordinate axis , And when the foldable display device 100 is in the flat state, the surfaces of the first housing 301 and the second housing 302 close to the flexible display panel 202 are located on the same horizontal plane and intersecting the straight line as the x-coordinate axis, and the x-coordinate axis and the y-coordinate The axes are coplanar and intersect perpendicularly, and the x-coordinate axis is parallel to the line connecting two symmetrical points on the first housing 301 and the second housing 302.
  • the intersection of the x-coordinate axis and the y-coordinate axis is the coordinate origin o.
  • the x coordinate axis, the y coordinate axis and the coordinate origin o constitute the xoy coordinate plane.
  • the coordinates of the orthographic projection of the first rotation center O1 on the xoy coordinate plane are (x1, y1), and the coordinates of the orthographic projection of the second rotation center O2 on the xoy coordinate plane are (-x1, y1).
  • the predetermined value R is 0.5 mm-3 mm.
  • the predetermined value R is too small. After the foldable display device is completely folded, the gap between the first casing 301 and the second casing 302 is too small, which is not conducive to the folding of the flexible display module in the first casing 301 and the second casing 301 and the second casing. In the gap between the casings 302; the predetermined value R is too large, the gap between the first casing 301 and the second casing 302 is too large, and the folded appearance of the foldable display device 100 does not meet the requirements.
  • the predetermined value R is 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2.0 mm, 2.5 mm, or 3.0 mm.
  • x1 is greater than 0, and y1 is greater than -0.3 mm and less than or equal to 1 mm, so as to avoid peeling or breaking of the flexible display panel 202, especially to avoid occurrence between the organic light emitting diode array layer 2022 and the thin film encapsulation layer 2023. Peel off, and prevent the film encapsulation layer 2023 from being broken.
  • y1 is less than or equal to 1 mm
  • the normal stress between the organic light emitting diode array layer 2022 and the thin film encapsulation layer 2023 is less than 0.6 MPa
  • the shear stress inside the thin film encapsulation layer 2023 is less than 500 MPa, which can avoid the organic light emitting diode array layer 2022 and the thin film encapsulation layer 2023.
  • the thin film encapsulation layer 2023 is peeled off, and the thin film encapsulation layer 2023 is prevented from being broken.
  • y1 is greater than or equal to -0.1 mm to further reduce the normal stress of the interface between the organic light emitting diode array layer 2022 and the thin film packaging layer 2023 and the shear stress inside the thin film packaging layer 2023.
  • y1 is less than or equal to 0.5 mm to further reduce the normal stress of the interface between the organic light emitting diode array layer 2022 and the thin film packaging layer 2023.
  • y1 is greater than or equal to -0.1 mm and less than or equal to 0.3 mm, so that the normal stress of the interface between the organic light emitting diode array layer and the thin film encapsulation layer during the bending process of the foldable display device is less than 0.1 MPa, Avoid peeling between the organic light emitting diode array layer 2022 and the thin film encapsulation layer 2023, and make the shear stress inside the thin film encapsulation layer 2023 less than 245 MPa during the bending process of the foldable display device 100, and avoid the thin film encapsulation layer 2023 from breaking.
  • the flexible display panel includes an organic light emitting diode array layer 2022.
  • the first housing 301 and the second housing 302 are close to the flexible display panel 202.
  • the distance of the surface is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. For example, they are 0.12 mm, 0.15 mm, 0.18 mm, 0.2 mm, 0.25 mm, and 0.28 mm.
  • the first rotation center O1 and the second rotation center O2 are located on the lower surface of the organic light emitting diode array layer 2022 on the side close to the first casing 301 and the second casing 302, and the first rotation center O1 and the second rotation center O2 are between
  • the distance from the bottom surface of the organic light emitting diode array layer 2022 is greater than or equal to 0 mm and less than or equal to 0.243 mm, or,
  • the first rotation center O1 and the second rotation center O2 are located on a side of the lower surface of the organic light emitting diode array layer 2022 away from the first casing 301 and the second casing 302, and the first rotation center O1 and the second rotation center O2 are to
  • the distance between the bottom surface of the organic light emitting diode array layer 2022 is greater than 0 mm and less than or equal to 0.157 mm. surface.
  • the radius of the rotation of the first casing 301 around the first rotation center O1 is 1 mm-10 mm
  • the radius of the rotation of the second casing 302 around the second rotation center O2 is 1 mm-10 mm.
  • the radius of the first movable arm 401 and the second movable arm 402 is 1 mm-10 mm
  • the radius of the first movable arm 401 and the second movable arm 402 is less than 1 mm, which will increase the difficulty of manufacturing the foldable display device.
  • the first movable arm 401 And the radius of the second moving arm 402 greater than 10 mm is not conducive to the thinning of the foldable display device.
  • the radius can be 2 mm, 3 mm, 4 mm, 5.5 mm, or 8 mm.
  • FIG. 10 shows the change of the normal stress between the organic light emitting diode array layer and the thin film encapsulation layer with time during the bending process of the flexible display device when the predetermined value R is 2 mm and the values of x1 and y1 are different.
  • FIG. 11 is a schematic diagram of the shear stress in the film packaging layer changing with time during the bending process of the flexible display device when the predetermined value R is 2 mm and x1 and y1 are different values, wherein the foldable display device 100 changes from flattening
  • the bending time from state folding to full folding (wedge folding) is 1s, and the organic light emitting diode array layer 2022 to the first housing 301 and the second housing 302 of the foldable device 100 in the flat state are close to the flexible display panel 202.
  • the distance between the surfaces is 0.143 mm, and the thickness of the film encapsulation layer 2023 is 0.01 mm.
  • the maximum normal stress of the interface between the organic light emitting diode array layer 2022 and the thin film encapsulation layer 2023 is 0.2648MPa, and when y1 is greater than or equal to -0.1 mm and less than or equal to 0.3 mm, the organic light emitting diode array layer
  • the maximum value of the normal stress of the interface between 2022 and the thin film encapsulation layer 2023 is less than 0.1 MPa, which can completely avoid peeling between the organic light emitting diode array layer 2022 and the thin film encapsulation layer 2023.
  • the change of the y1 value has a greater impact on the maximum normal stress of the interface between the organic light emitting diode array layer 2022 and the thin film packaging layer 2023.
  • FIG. 12 is a schematic diagram of the folded shape of the flexible display module when the predetermined value R is 2 mm and the same time is different (x1, y1).
  • A is a schematic diagram of the folded shape of the flexible display module when x1 is 1mm and y1 is 1mm
  • B is a schematic diagram of the folded shape of the flexible display module when x1 is 1.7mm and y1 is 0.3mm
  • C is that x1 is 1.9mm
  • y1 is a schematic diagram of the folded shape of the flexible display module when y1 is 0.1 mm
  • D is a schematic diagram of the folded shape of the flexible display module when x1 is 2.0 mm and y1 is -0.1 mm
  • E is that x1 is 2.3 mm and y1 is -0.3 Schematic diagram of the folded shape of the flexible display module in millimeters.
  • the value of y1 is relatively large, for example, when x1 is 1 mm and y1 is 1 mm, when the distance between the first casing 301 and the second casing 302 is large, the flexible display module 20 is easy to
  • the y1 value is small, for example, x1 is 2.3 mm and y1 is -0.3 mm, the distance between the first housing 301 and the second housing 302 is relatively small at the beginning of rotation, and the flexible display module 20 is easily squeezed.
  • a smaller or larger value of y1 will cause the stress in the bending process of the flexible display module 20 to increase.
  • the flexible display panel 202 is the most critical functional layer, and the control of the stress during the bending process is the key point.
  • the distance from the organic light emitting diode array layer 2022 to the first housing 301 and the second housing 302 is 0.1 mm-0.35 mm, and the first rotation center O1 and the second rotation center are controlled by controlling the first rotation center O1 and the second rotation center.
  • the predetermined value R is limited to 0.5 mm-3 mm and the distance between the organic light-emitting diode array layer 2022 of the flexible display module 20 in the embodiment of the present application
  • the best first rotation center O1 and the second The ordinate y1 of the orthographic projection of the second rotation center O2 varies in the range of -0.1 mm to 0.3 mm, and the best first rotation center O1 and the second rotation center O2 are arranged at a distance from the bottom surface of the organic light emitting diode array layer 2022 (organic light emitting diode).
  • the surface of the diode array layer 2022 near the first housing and the second housing is in the range of 0 mm to 0.243 mm on the side close to the first housing and the second housing, or the best first rotation center O1 and the first
  • the second rotation center O2 is arranged in a range of 0 mm to 0.157 mm from the bottom surface of the organic light emitting diode array layer 2022 away from the first housing and the second housing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Mechanical Engineering (AREA)
  • Mathematical Physics (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

本申请提供一种可折叠显示装置，可折叠显示装置包括第一机壳、第二机壳，第一机壳围绕第一旋转中心转动，第二机壳围绕第二旋转中心转动，第一旋转中心在xoy坐标平面的正投影的坐标为(x1，y1)，第二旋转中心在xoy坐标平面的正投影的坐标为(-x1，y1)，x1和y1的加和为预定值，x1大于0，y1大于-0.3毫米且小于或等于1毫米。

Description

可折叠显示装置 技术领域
本申请涉及可折叠显示技术领域，尤其涉及一种可折叠显示装置。
背景技术
目前，可折叠显示设备已成为显示行业的一大发展方向，可折叠显示装置的屏幕在弯折过程受到应力的作用会导致屏幕在弯折过程中存在失效的风险。
因此，有必要提出一种技术方案以降低可折叠显示装置在弯折过程中受应力作用而导致屏幕失效的问题。
技术问题
本申请的目的在于提供一种可折叠显示装置，以降低可折叠显示装置在弯折过程中受应力作用而导致屏幕失效的问题。
技术解决方案
为实现上述目的，本申请提供一种可折叠显示装置，其中，所述可折叠显示装置包括第一机壳、第二机壳以及柔性显示面板，
所述第一机壳和所述第二机壳用于支撑所述柔性显示面板，所述第一机壳与所述第二机壳对置，所述第一机壳围绕第一旋转中心转动，所述第二机壳围绕第二旋转中心转动；
其中，以所述可折叠显示装置处于展平状态时位于所述第一机壳和所述第二机壳之间的中间位置且垂直于所述第一机壳和所述第二机壳所在平面的直线为y坐标轴，且以所述可折叠显示装置处于展平状态时与所述第一机壳和所述第二机壳靠近所述柔性显示面板的表面位于同一水平面且相交的直线为x坐标轴，所述x坐标轴与所述y坐标轴共平面且垂直相交，所述x坐标轴和所述y坐标轴的交点为坐标原点o，所述x坐标轴、所述y坐标轴以及所述坐标原点o构成xoy坐标平面，所述第一旋转中心在所述xoy坐标平面的正投影的坐标为(x1，y1)，所述第二旋转中心在所述xoy坐标平面的正投影的坐标为(-x1，y1)；
所述x1和所述y1之和为预定值，所述x1大于0，所述y1大于-0.3毫米且小于或等于1毫米，所述预定值大于0毫米且小于或等于2.5毫米。
在上述可折叠显示装置中，所述y1大于或等于-0.1毫米。
在上述可折叠显示装置中，所述y1小于或等于0.5毫米。
在上述可折叠显示装置中，所述y1大于或等于-0.1毫米且小于或等于0.3毫米。
在上述可折叠显示装置中，所述x1为1.9毫米，所述y1为0.1毫米。
在上述可折叠显示装置中，所述柔性显示面板包括有机发光二极管阵列层，所述有机发光二极管阵列层在所述可折叠显示装置处于展平状态时至所述第一机壳和所述第二机壳靠近所述柔性显示面板的表面的距离大于或等于0.1毫米且小于或等于0.3毫米。
在上述可折叠显示装置中，在所述可折叠显示装置处于展平状态时，在所述y坐标轴的方向上，
所述第一旋转中心和所述第二旋转中心位于所述有机发光二极管阵列层的下表面靠近所述第一机壳和所述第二机壳的一侧，且所述第一旋转中心和所述第二旋转中心至所述有机发光二极管阵列层的所述下表面的距离大于或等于0毫米且小于或等于0.243毫米，或，
所述第一旋转中心和所述第二旋转中心位于所述有机发光二极管阵列层的所述下表面远离所述第一机壳和所述第二机壳的一侧，且所述第一旋转中心和所述第二旋转中心至所述有机发光二极管阵列层的所述下表面的距离大于0毫米且小于或等于0.157毫米，所述有机发光二极管阵列层的下表面为所述有机发光二极管阵列层靠近所述第一机壳和所述第二机壳的表面。
在上述可折叠显示装置中，所述第一机壳围绕第一旋转中心转动的半径为1毫米-10毫米，所述第二机壳围绕第二旋转中心转动的半径为1毫米-10毫米。
在上述可折叠显示装置中，所述第一机壳和所述第二机壳同步对称旋转，所述可折叠显示装置包括双轴心旋转机构，所述双轴心旋转机构包括具有第一旋转中心的第一运动臂、具有第二旋转中心的第二运动臂、具有第一圆弧形槽的第一固定滑槽块以及具有第二圆弧形槽的第二固定滑槽块，
所述第一运动臂包括第一连接件以及连接于所述第一连接件一端的第一圆弧形件，所述第一运动臂的第一连接件远离第一圆弧形件的一端固定于第一机壳内，所述第一运动臂的所述第一圆弧形件卡入至所述第一固定滑槽块的所述第一圆弧形槽中，所述第一圆弧形件与所述第一圆弧形槽相配合；
所述第二运动臂包括第二连接件以及连接于所述第二连接件一端的第二圆弧形件，所述第二运动臂的第二连接件远离第二圆弧形件的一端固定于所述第二机壳内，所述第二运动臂的所述第二圆弧形件卡入至所述第二固定滑槽块的所述第二圆弧形槽中，所述第二圆弧形件与所述第二圆弧形槽相配合。
一种可折叠显示装置，所述可折叠显示装置包括第一机壳、第二机壳 以及柔性显示面板，
所述第一机壳和所述第二机壳用于支撑所述柔性显示面板，所述第一机壳与所述第二机壳对置，所述第一机壳围绕第一旋转中心转动，所述第二机壳围绕第二旋转中心转动；
其中，以所述可折叠显示装置处于展平状态时位于所述第一机壳和所述第二机壳之间的中间位置且垂直于所述第一机壳和所述第二机壳所在平面的直线为y坐标轴，且以所述可折叠显示装置处于展平状态时与所述第一机壳和所述第二机壳靠近所述柔性显示面板的表面位于同一水平面且相交的直线为x坐标轴，所述x坐标轴与所述y坐标轴共平面且垂直相交，所述x坐标轴和所述y坐标轴的交点为坐标原点o，所述x坐标轴、所述y坐标轴以及所述坐标原点o构成xoy坐标平面，所述第一旋转中心在所述xoy坐标平面的正投影的坐标为(x1，y1)，所述第二旋转中心在所述xoy坐标平面的正投影的坐标为(-x1，y1)；
所述x1和所述y1之和为预定值，所述x1大于0，所述y1大于-0.3毫米且小于或等于1毫米，所述预定值大于0。
在上述可折叠显示装置中，所述y1大于或等于-0.1毫米。
在上述可折叠显示装置中，所述y1小于或等于0.5毫米。
在上述可折叠显示装置中，所述y1大于或等于-0.1毫米且小于或等于0.3毫米。
在上述可折叠显示装置中，所述预定值为0.5毫米-3毫米。
在上述可折叠显示装置中，所述x1为1.9毫米，所述y1为0.1毫米。
在上述可折叠显示装置中，所述柔性显示面板包括有机发光二极管阵列层，所述有机发光二极管阵列层在所述可折叠显示装置处于展平状态时至所述第一机壳和所述第二机壳靠近所述柔性显示面板的表面的距离大于或等于0.1毫米且小于或等于0.3毫米。
在上述可折叠显示装置中，在所述可折叠显示装置处于展平状态时，在所述y坐标轴的方向上，
所述第一旋转中心和所述第二旋转中心位于所述有机发光二极管阵列层的下表面靠近所述第一机壳和所述第二机壳的一侧，且所述第一旋转中心和所述第二旋转中心至所述有机发光二极管阵列层的所述下表面的距离大于或等于0毫米且小于或等于0.243毫米，或，
所述第一旋转中心和所述第二旋转中心位于所述有机发光二极管阵列层的所述下表面远离所述第一机壳和所述第二机壳的一侧，且所述第一旋转中心和所述第二旋转中心至所述有机发光二极管阵列层的所述下表面的距离大于0毫米且小于或等于0.157毫米，所述有机发光二极管阵列层的下表面为所述有机发光二极管阵列层靠近所述第一机壳和所述第二机壳的表面。
在上述可折叠显示装置中，所述第一机壳围绕第一旋转中心转动的半径为1毫米-10毫米，所述第二机壳围绕第二旋转中心转动的半径为1毫米-10毫米。
在上述可折叠显示装置中，所述第一机壳和所述第二机壳同步对称旋转所述可折叠显示装置包括双轴心旋转机构，所述双轴心旋转机构包括具有第一旋转中心的第一运动臂、具有第二旋转中心的第二运动臂、具有第一圆弧形槽的第一固定滑槽块以及具有第二圆弧形槽的第二固定滑槽块，
所述第一运动臂包括第一连接件以及连接于所述第一连接件一端的第一圆弧形件，所述第一运动臂的第一连接件远离第一圆弧形件的一端固定于第一机壳内，所述第一运动臂的所述第一圆弧形件卡入至所述第一固定滑槽块的所述第一圆弧形槽中，所述第一圆弧形件与所述第一圆弧形槽相配合；
所述第二运动臂包括第二连接件以及连接于所述第二连接件一端的第二圆弧形件，所述第二运动臂的第二连接件远离第二圆弧形件的一端固定于所述第二机壳内，所述第二运动臂的所述第二圆弧形件卡入至所述第二固定滑槽块的所述第二圆弧形槽中，所述第二圆弧形件与所述第二圆弧形槽相配合。
在上述可折叠显示装置中，所述可折叠显示装置还包括联动机构以及第三机壳，所述第三机壳设置于所述第一机壳和所述第二机壳之间，所述第一固定滑槽块和所述第二固定滑槽块固定于所述第三机壳内，所述联动机构包括第一传动组件、第二传动组件以及齿轮，
所述第一传动组件包括第一齿条以及设置于第一圆弧形件上的第一滑块，所述第一齿条具有第一端面以及与所述第一端面垂直的第二端面，所述第一端面具有沿传动方向排布的平条齿，所述第二端面设置有第一滑槽，所述第一圆弧形件上的所述第一滑块卡接于所述第一滑槽，所述第一齿条设置于所述第一固定滑槽块的第一导向面上；
所述第二传动组件包括第二齿条以及设置于第二圆弧形件上的第二滑块，所述第二齿条具有第三端面以及与所述第三端面垂直的第四端面，所述第三端面设置有沿传动方向排布的平条齿，所述第四端面设置有第二滑槽，所述第二圆弧形件上的所述第二滑块卡接于所述第二滑槽，所述第二齿条设置于所述第二固定滑槽块的第二导向面上；
所述齿轮转动连接于所述第三机壳上，所述第一齿条沿传动方向排布的平条齿与所述齿轮咬合，所述第二齿条沿传动方向排布的平条齿与所述齿轮咬合。
有益效果
有益效果：本申请提供一种可折叠显示装置，可折叠显示装置包括第 一机壳、第二机壳以及柔性显示面板，第一机壳和第二机壳用于支撑柔性显示面板，第一机壳与第二机壳对置，第一机壳围绕第一旋转中心转动，第二机壳围绕第二旋转中心转动，第一旋转中心在xoy坐标平面的正投影的坐标为(x1，y1)，第二旋转中心在xoy坐标平面的正投影的坐标为(-x1，y1)，x1和y1的加和为预定值，x1大于0，y1大于-0.3毫米且小于或等于1毫米，以使得在可折叠显示装置弯折过程中柔性显示面板中有机发光二极管阵列层和封装层之间界面的法向应力小于0.6281MPa，封装层内部的切应力小于582.6MPa，避免薄膜封装层断裂以及有机发光二极管阵列层和薄膜封装层之间发生剥离，避免柔性显示面板在可折叠显示装置弯折过程中出现膜层剥离或断裂。
附图说明
图1为本申请实施例可折叠显示装置处于展平状态时的截面示意图；
图2为本申请实施例可折叠显示装置处于90度弯折时的截面示意图；
图3为本申请实施例可折叠显示装置处于完全弯折状态时的截面示意图；
图4为本申请实施例可折叠显示装置的分解示意图；
图5为图4中双轴心旋转机构以及联动机构的示意图；
图6为图5所示双轴心旋转机构的第一运动臂和第二运动臂在可折叠显示装置弯折过程中的旋转过程示意图；
图7为图4所示柔性显示模组的截面示意图；
图8为图7所示柔性显示面板的截面示意图；
图9为第一旋转中心和第二旋转中心的正投影在xoy坐标平面的示意图；
图10为预定值R为2毫米且x1和y1不同取值时柔性显示装置弯折过程中有机发光二极管阵列层和薄膜封装层之间的法向应力随时间变化的示意图；
图11为预定值R为2毫米且x1和y1不同取值时柔性显示装置弯折过程中薄膜封装层内的切应力随时间变化的示意图；
图12为预定值R为2毫米时相同时刻不同(x1，y1)时柔性显示模组折叠形状的示意图。
附图标注如下：
100可折叠显示装置；301第一机壳；301a第一支撑平面；301b第一容置腔；302第二机壳；302a第二支撑平面；302b第二容置腔；303第三机壳；303a容纳空腔；20柔性显示模组；201后盖板；202柔性显示面板；2021柔性衬底；2022有机发光二极管阵列层；2023薄膜封装层；203偏光片；204保护盖板；40双轴心旋转机构；O1 第一旋转中心；O2第二旋转中心；401第一运动臂；4011第一连接件；4012第一圆弧形件；402第二运动臂；4021第二连接件；4022第二圆弧形件；403第一固定滑槽块；403a第一圆弧形槽；403b第一导向面；404第二固定滑槽块；404a第二圆弧形槽；404b第二导向面；50联动机构；501第一传动组件；5011第一齿条；5011a第一端面；5011b第二端面；5012第一滑块；502第二传动组件；5021第二齿条；5021a第三端面；5021b第四端面；5022第二滑块；503齿轮。
本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
请参阅图1-图6，其中，图1为本申请实施例可折叠显示装置处于展平状态时的截面示意图，图2为本申请实施例可折叠显示装置处于90度弯折时的截面示意图，图3为本申请实施例可折叠显示装置处于完全弯折状态时的截面示意图，图4为本申请实施例可折叠显示装置的分解示意图，图5为图4中双轴心旋转机构以及联动机构的示意图，图6为图5所示双轴心旋转机构的第一运动臂和第二运动臂在可折叠显示装置弯折过程中的过程示意图。
可折叠显示装置100包括第一机壳301、第二机壳302、第三机壳303、柔性显示模组20、双轴心旋转机构40以及联动机构50。
第一机壳301和第二机壳302用于支撑柔性显示模组20。第一机壳301具有第一支撑平面301a。第二机壳302具有第二支撑平面302a。第二机壳302与第一机壳301对置。第一机壳301围绕第一旋转中心O1转动，第二机壳302围绕第二旋转中心O2转动。第一机壳301和第二机壳302同步对称旋转。第一机壳301靠近第二机壳302的一端具有第一容置腔301b。第二机壳302靠近第一机壳301的一端具有第二容置腔302b。
第三机壳303用于容置并固定双轴心旋转机构40，且用于容置联动机构50。第三机壳303为具有容纳空腔303a的机壳。第三机壳303设置于第一机壳301和第二机壳302之间。
双轴心旋转机构40包括具有第一旋转中心O1的第一运动臂401、具有第二旋转中心O2的第二运动臂402、具有第一圆弧形槽403a的第一固定滑槽块403以及具有第二圆弧形槽404a的第二固定滑槽块404。第一运动臂401和第二运动臂402同步对称旋转。
第一运动臂401与第一机壳301连接以使第一机壳301围绕第一旋转中心O1转动。第一运动臂401包括第一连接件4011以及连接于第一连接件4011一端的第一圆弧形件4012。第一运动臂401的第一连接件4011远离第一圆弧形件4012的一端固定于第一机壳301内，第一运动臂401的第一圆弧形件4012卡入至第一固定滑槽块403的第一圆弧形槽403a中，第一圆弧形件4012与第一圆弧形槽403a相配合。第一运动臂401的第一连接件4011固定于围合成第一容置腔301b的内壁上。
第二运动臂402与第二机壳302连接以使第二机壳302围绕第二旋转中心O2转动。第二运动臂402包括第二连接件4021以及连接于第二连接件4021一端的第二圆弧形件4022。第二运动臂402的第二连接件4021远离第二圆弧形件4022的一端固定于第二机壳302内，第二运动臂402的第二圆弧形件4022卡入至第二固定滑槽块404的第二圆弧形槽404a中，第二圆弧形件4022与第二圆弧形槽404a相配合。第二运动臂402的第二连接件4021固定于围合成第二容置腔302b的内壁上。第二连接件4021与第一连接件4011相同，两者均为板状。第二圆弧形件4022与第一圆弧形件4012相同。第一固定滑槽块403的第一圆弧形槽403a与第二固定滑槽块404的第二圆弧形槽404a相同。
第一固定滑槽块403以及第二固定滑槽块404均固定于第三机壳303中。
联动机构50用于使第一运动臂401和第二运动臂402同步对称旋转。联动机构50包括第一传动组件501、第二传动组件502以及齿轮503。齿轮503与第三机壳303销接，以使齿轮503能自由旋转。
第一传动组件501包括第一齿条5011以及设置于第一圆弧形件4012上的第一滑块5012，第一齿条5011具有第一端面5011a以及与第一端面5011a垂直的第二端面5011b，第一端面5011a设置有沿传动方向排布的平条齿，第二端面5011b设置有第一滑槽。第一圆弧形件4012上的第一滑块5012卡入于第一齿条5011的第一滑槽中。第一齿条5011沿传动方向排布的平条齿与齿轮503咬合。第一滑块5012与第一齿条5011的第一滑槽相配合。第一滑块5012为圆柱形。第一齿条5011设置于第一固定滑槽块403的第一导向面403b上。
第二传动组件502包括第二齿条5021以及设置于第二圆弧形件4022上的第二滑块5022，第二齿条5021具有第三端面5021a以及与第三端面5021a垂直的第四端面5021b，第三端面5021a设置有沿传动方向排布的平条齿，第四端面5021b设置有第二滑槽。第二圆弧形件4022上的第二滑块5022卡入于第二齿条5021的第二滑槽中。第二齿条5021沿传动方向排布的平条齿与齿轮503咬合。第二滑块5022 与第二齿条5021的第二滑槽相配合，第二滑块5022为圆柱形。齿轮503传动连接第一齿条5011和第二齿条5021。第二齿条5021设置于第二固定滑槽块404的第二导向面404b上。
结合图5和图4所示，第一运动臂401通过沿第一圆弧形槽403逆时针旋转45度时，第一运动臂401上的第一滑块5012通过第一齿条5011上的第一滑槽配合推动第一齿条5011向右滑移，第一齿条5011带动齿轮503开始旋转。而齿轮503的旋转将带动第二齿条5021相对第三机壳303向左滑移，第二齿条5021向左滑移又将通过第二齿条5021上的第二滑槽和第二滑块5022配合带动运第二运动臂402相对向左移动，从而使第二运动臂402亦相对第三机壳303顺时针旋转45度。第一运动臂401带动第一机壳301逆时针旋转45度，第二运动臂402带动第二机壳302顺时针旋转45度。可折叠显示装置整体形成对称的关系，防止可折叠显示装置在一侧机壳转动而另一侧机壳不旋转相同角度时，柔性显示模组弯折成不对称的形状而产生较大的应力。第一运动臂401继续沿着第一旋转中心O1旋转，第二运动臂402将随之旋转相同角度。将第一运动臂401与第二运动臂402分别固定在第一机壳301与第二机壳302上，则第一运动臂401和第二运动臂402的运动轨迹完全反映在第一机壳301和第二机壳302上，当第一机壳301、第二机壳302联动旋转至尾部相靠时，第一机壳301和第二机壳302之间的弯折区让出楔形空间使柔性显示模组形成类光滑的弧形，补偿了机构弯折后与柔性显示模组之间的尺寸差。如图7所示，其为图4所示柔性显示模组的截面示意图。柔性显示模组20包括后盖板201、柔性显示面板202、偏光片203以及保护盖板204。后盖板201、柔性显示面板202、偏光片203以及保护盖板204依次叠置。后盖板201靠近第一机壳301和第二机壳302设置。后盖板201用于保护柔性显示面板202的出光面的背面。后盖板201与柔性显示面板202通过透明胶粘层连接。偏光片203用于提高柔性显示面板202显示时的对比度。偏光片203与柔性显示面板202之间通过透明胶粘层连接。保护盖板204用于保护偏光片203以及柔性显示面板202。
如图8所示，其为图7所示柔性显示面板的示意图。柔性显示面板202包括柔性衬底2021、有机发光二极管阵列层2022、薄膜封装层2023。薄膜封装层2023包括有机绝缘层以及无机绝缘层。无机绝缘层的制备材料选自氮化硅或氧化硅。有机绝缘层的制备材料选自聚丙烯酸酯等。柔性衬底2021为聚酰亚胺层。有机发光二极管阵列层2022包括多个阵列排布的有机发光二极管。
在可折叠显示装置折叠过程中，柔性显示面板在折叠过程中发生失效的类型有薄膜封装层2023与有机发光二极管阵列层2022之间发生剥 离以及薄膜封装层2023的断裂。薄膜封装层2023与有机发光二极管阵列层2022之间发生剥离是由于位于薄膜封装层2023与有机发光二极管阵列层2022之间界面的法向应力F1作用。薄膜封装层2023的断裂是由于薄膜封装层2023内的切应力F2作用。
如图9所示，其为第一旋转中心和第二旋转中心的正投影在xoy坐标平面的示意图。以可折叠显示装置100处于展平状态时位于第一机壳301和第二机壳302之间的中间位置且垂直于第一机壳301和第二机壳302所在平面的直线为y坐标轴，且以可折叠显示装置100处于展平状态时与第一机壳301和第二机壳302靠近柔性显示面板202的表面位于同一水平面且相交的直线为x坐标轴，x坐标轴与y坐标轴共平面且垂直相交，x坐标轴与第一机壳301和第二机壳302上对称两点的连线平行。x坐标轴和y坐标轴的交点为坐标原点o。x坐标轴、y坐标轴以及坐标原点o构成xoy坐标平面。第一旋转中心O1在xoy坐标平面的正投影的坐标为(x1，y1)，第二旋转中心O2在xoy坐标平面的正投影的坐标为(-x1，y1)。
可折叠显示装置处于展平状态时，第一机壳301和第二机壳302之间的夹角为180度。第一机壳301和第二机壳302均转动90度后，第一机壳301和第二机壳302之间的夹角为0度。第一机壳301和第二机壳302之间的夹角为0度时，第一机壳301和第二机壳302之间的距离的二分之一等于预定值R。由于第一机壳301围绕第一旋转中心O1旋转，通过几何关系可知，x1+y1＝R，即x1与y1之和等于预定值R。
在本实施例中，预定值R为0.5毫米-3毫米。预定值R太小，可折叠显示装置完全折叠后，第一机壳301和第二机壳302之间的间隙太小，不利于柔性显示模组折叠后收容于第一机壳301和第二机壳302之间的间隙中；预定值R太大，第一机壳301和第二机壳302之间的间隙太大，可折叠显示装置100折叠后的外观不符合要求。例如预定值R为1毫米、1.2毫米、1.5毫米、1.8毫米、2.0毫米、2.5毫米或者3.0毫米。
在本实施例中，x1大于0，y1大于-0.3毫米且小于或等于1毫米，以避免柔性显示面板202出现剥离或者断裂，特别是避免有机发光二极管阵列层2022和薄膜封装层2023之间出现剥离，且避免薄膜封装层2023出现断裂。y1小于或等于1毫米时，有机发光二极管阵列层2022和薄膜封装层2023之间的法向应力小于0.6MPa，且薄膜封装层2023内部的切应力小于500MPa，能避免有机发光二极管阵列层2022和薄膜封装层2023之间发生剥离，且避免薄膜封装层2023出现断裂。y1大于或等于-0.1毫米，以进一步地减小有机发光二极管阵列层2022和薄膜封装层2023之间界面的法向应力以及薄膜封装层2023内部的 切应力。或，y1小于或等于0.5毫米，以进一步地减小有机发光二极管阵列层2022和薄膜封装层2023之间界面的法向应力。
在本实施例中，y1大于或等于-0.1毫米且小于或等于0.3毫米，以使得可折叠显示装置弯折过程中有机发光二极管阵列层和薄膜封装层之间界面的法向应力小于0.1MPa，避免有机发光二极管阵列层2022和薄膜封装层2023之间出现剥离，且使得可折叠显示装置100弯折过程中薄膜封装层2023内部的切应力小于245MPa，避免薄膜封装层2023断裂。
在本实施例中，柔性显示面板包括有机发光二极管阵列层2022，有机发光二极管阵列层2022在可折叠显示装置处于展平状态时至第一机壳301和第二机壳302靠近柔性显示面板202的表面的距离大于或等于0.1毫米且小于或等于0.3毫米。例如为0.12毫米、0.15毫米、0.18毫米、0.2毫米、0.25毫米以及0.28毫米。
在本实施例中，在可折叠显示装置处于展平状态时，在y坐标轴的方向上，
第一旋转中心O1和第二旋转中心O2位于有机发光二极管阵列层2022的下表面靠近第一机壳301和第二机壳302的一侧，且第一旋转中心O1和第二旋转中心O2至有机发光二极管阵列层2022的下表面的距离大于或等于0毫米且小于或等于0.243毫米，或，
第一旋转中心O1和第二旋转中心O2位于有机发光二极管阵列层2022的下表面远离第一机壳301和第二机壳302的一侧，且第一旋转中心O1和第二旋转中心O2至有机发光二极管阵列层2022的下表面的距离大于0毫米且小于或等于0.157毫米，有机发光二极管阵列层2022的下表面为有机发光二极管阵列层2022靠近第一机壳301和第二机壳302的表面。
在本实施例中，第一机壳301围绕第一旋转中心O1转动的半径为1毫米-10毫米，第二机壳302围绕第二旋转中心O2转动的半径为1毫米-10毫米，即第一运动臂401和第二运动臂402的半径为1毫米-10毫米，第一运动臂401和第二运动臂402的半径小于1毫米会增加可折叠显示装置的制造难度，第一运动臂401和第二运动臂402的半径大于10毫米不利于可折叠显示装置的薄化。半径可以为2毫米、3毫米、4毫米、5.5毫米或8毫米。
请参阅图10以及图11，图10为预定值R为2毫米且x1和y1不同取值时柔性显示装置弯折过程中有机发光二极管阵列层和薄膜封装层之间的法向应力随时间变化的示意图，图11为预定值R为2毫米且x1和y1不同取值时柔性显示装置弯折过程中薄膜封装层内的切应力随时间变化的示意图，其中，可折叠显示装置100从展平状态折叠至完全折叠(楔形折叠)的弯折时间为1s，有机发光二极管阵列层 2022至处于展平状态的可折叠装置100的第一机壳301和第二机壳302靠近柔性显示面板202的表面的距离为0.143毫米，薄膜封装层2023的厚度为0.01毫米。
由图10可知，可折叠显示装置从展平状态弯折至完全折叠状态的过程中，有机发光二极管阵列层2022和薄膜封装层2023之间界面的法向应力在不断变化。在可折叠显示装置100弯折过程中，预定值R为2毫米时不同(x1，y1)对应的有机发光二极管阵列层2022和薄膜封装层2023之间界面的法向应力最大值如下表1。
表1预定值R为2毫米时不同(x1，y1)对应的有机发光二极管阵列层和薄膜封装层之间界面的法向应力最大值
Figure PCTCN2020096350-appb-000001
由表1可知，x1和y1之和为2毫米时，y1小于-0.3毫米会导致有机发光二极管阵列层2022和薄膜封装层2023之间界面的法向应力最大值大于0.6281MPa，会导致有机发光二极管阵列层2022和薄膜封装层2023之间出现剥离的风险。y1为0.5毫米时，有机发光二极管阵列层2022和薄膜封装层2023之间界面的法向应力最大值为0.2648MPa，y1大于或等于-0.1毫米且小于或等于0.3毫米时，有机发光二极管阵列层2022和薄膜封装层2023之间界面的法向应力最大值均小于0.1MPa，完全可以避免有机发光二极管阵列层2022和薄膜封装层2023之间出现剥离。y1值的变化对有机发光二极管阵列层2022和薄膜封装层2023之间界面的法向应力最大值的影响较大。由图11可知，可折叠显示装置从展平状态弯折至完全折叠状态的过程中，薄膜封装层2023内部的切应力在不断变化。在可折叠显示装置弯折过程中，预定值R为2毫米时不同(x1，y1)对应的薄膜封装层内部的切应力最大值如下表2。
表2预定值R为2毫米时不同(x1，y1)对应的薄膜封装层内部的应力最大值
Figure PCTCN2020096350-appb-000002
Figure PCTCN2020096350-appb-000003
由表2可知，x1和y1之和为预定值2毫米时，y1小于-0.3毫米会导致薄膜封装层2023的内部的切应力大于582.6MPa，切应力大于582.6MPa会导致薄膜封装层出现断裂的风险。y1从0.5毫米减小至-0.1毫米过程中，薄膜封装层2023内部的切应力在240MPa左右变化，未发生明显变化。
由图10和图11可知，预定值R为2毫米时，y1在-0.1毫米至0.3毫米的范围内变化，有机发光二极管阵列层2022和薄膜封装层2023之间界面的法向应力的最大值、薄膜封装层2023内部切应力的最大值均较低，故可折叠显示装置弯折过程中有机发光二极管阵列层2022和薄膜封装层2023剥离的风险以及薄膜封装层2023断裂的风险较低。
请参阅图12，其为预定值R为2毫米时相同时刻不同(x1，y1)时柔性显示模组折叠形状的示意图。A为x1为1毫米且y1为1毫米时柔性显示模组的折叠形状的示意图，B为x1为1.7毫米且y1为0.3毫米时柔性显示模组的折叠形状的示意图，C为x1为1.9毫米且y1为0.1毫米时柔性显示模组的折叠形状的示意图，D为x1为2.0毫米且y1为-0.1毫米时柔性显示模组的折叠形状的示意图，E为x1为2.3毫米且y1为-0.3毫米时柔性显示模组的折叠形状的示意图。在相同时刻，在旋转初期，y1值较大，例如x1为1毫米且y1为1毫米时，第一机壳301和第二机壳302之间的间距较大时，柔性显示模组20容易受到拉扯；y1值较小时，例如x1为2.3毫米且y1为-0.3毫米，旋转初期第一机壳301和第二机壳302之间的间距较小，柔性显示模组20容易受挤压。y1值较小或较大均会导致柔性显示模组20弯折过程中的应力增加。
在可折叠显示装置100折叠过程中，柔性显示面板202作为最关键的功能层，其在弯折过程中所受应力的控制是关键点。特别是有机发光二极管阵列层2022与薄膜封装层2023之间界面的法向应力以及薄膜封装层2023内部的切应力。在可折叠显示装置100处于展平状态时有机发光二极管阵列层2022至第一机壳301和第二机壳302的距离为0.1毫米-0.35毫米，通过控制第一旋转中心O1和第二旋转中心O2至处于展平状态的可折叠显示装置100的第一机壳301和第二机壳302靠近柔性显示面板202的表面的距离，以控制柔性显示模组20在完全折叠过程中的形状，从而使得柔性显示面板202在弯折过程中的应力减小，避免柔性显示面板202出现失效的风险。
由于柔性显示模组20内在有机发光二极管阵列层2022以下的膜层变 化较多，预定值R限制在0.5毫米-3毫米且本申请实施例中柔性显示模组20的有机发光二极管阵列层2022距离可折叠显示装置20处于展平状态时的第一机壳301和第二机壳302的上表面(靠近柔性显示模组的表面)的距离为0.143毫米时，最佳第一旋转中心O1和第二旋转中心O2的正投影的纵坐标y1在-0.1毫米至0.3毫米的范围内变化，最佳第一旋转中心O1和第二旋转中心O2设置在距离有机发光二极管阵列层2022下表面(有机发光二极管阵列层2022靠近第一机壳和第二机壳的表面)靠近第一机壳和第二机壳一侧的0毫米至0.243毫米的范围内，或，最佳第一旋转中心O1和第二旋转中心O2设置在距离有机发光二极管阵列层2022下表面远离第一机壳和第二机壳一侧的0毫米至0.157毫米范围内。
以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。

Claims (20)

  1. 一种可折叠显示装置，其中，所述可折叠显示装置包括第一机壳、第二机壳以及柔性显示面板，
    所述第一机壳和所述第二机壳用于支撑所述柔性显示面板，所述第一机壳与所述第二机壳对置，所述第一机壳围绕第一旋转中心转动，所述第二机壳围绕第二旋转中心转动；
    其中，以所述可折叠显示装置处于展平状态时位于所述第一机壳和所述第二机壳之间的中间位置且垂直于所述第一机壳和所述第二机壳所在平面的直线为y坐标轴，且以所述可折叠显示装置处于展平状态时与所述第一机壳和所述第二机壳靠近所述柔性显示面板的表面位于同一水平面且相交的直线为x坐标轴，所述x坐标轴与所述y坐标轴共平面且垂直相交，所述x坐标轴和所述y坐标轴的交点为坐标原点o，所述x坐标轴、所述y坐标轴以及所述坐标原点o构成xoy坐标平面，所述第一旋转中心在所述xoy坐标平面的正投影的坐标为(x1，y1)，所述第二旋转中心在所述xoy坐标平面的正投影的坐标为(-x1，y1)；
    所述x1和所述y1之和为预定值，所述x1大于0，所述y1大于-0.3毫米且小于或等于1毫米，所述预定值大于0毫米且小于或等于2.5毫米。
  2. 根据权利要求1所述的可折叠显示装置，其中，所述y1大于或等于-0.1毫米。
  3. 根据权利要求1所述的可折叠显示装置，其中，所述y1小于或等于0.5毫米。
  4. 根据权利要求1所述的可折叠显示装置，其中，所述y1大于或等于-0.1毫米且小于或等于0.3毫米。
  5. 根据权利要求1所述的可折叠显示装置，其中，所述x1为1.9毫米，所述y1为0.1毫米。
  6. 根据权利要求1所述的可折叠显示装置，其中，所述柔性显示面板包括有机发光二极管阵列层，所述有机发光二极管阵列层在所述可折叠显示装置处于展平状态时至所述第一机壳和所述第二机壳靠近所述柔性显示面板的表面的距离大于或等于0.1毫米且小于或等于0.3毫米。
  7. 根据权利要求6所述的可折叠显示装置，其中，在所述可折叠显示装置处于展平状态时，在所述y坐标轴的方向上，
    所述第一旋转中心和所述第二旋转中心位于所述有机发光二极管阵列层的下表面靠近所述第一机壳和所述第二机壳的一侧，且所述第一 旋转中心和所述第二旋转中心至所述有机发光二极管阵列层的所述下表面的距离大于或等于0毫米且小于或等于0.243毫米，或，
    所述第一旋转中心和所述第二旋转中心位于所述有机发光二极管阵列层的所述下表面远离所述第一机壳和所述第二机壳的一侧，且所述第一旋转中心和所述第二旋转中心至所述有机发光二极管阵列层的所述下表面的距离大于0毫米且小于或等于0.157毫米，所述有机发光二极管阵列层的下表面为所述有机发光二极管阵列层靠近所述第一机壳和所述第二机壳的表面。
  8. 根据权利要求1所述的可折叠显示装置，其中，所述第一机壳围绕第一旋转中心转动的半径为1毫米-10毫米，所述第二机壳围绕第二旋转中心转动的半径为1毫米-10毫米。
  9. 根据权利要求1所述的可折叠显示装置，其中，所述第一机壳和所述第二机壳同步对称旋转，所述可折叠显示装置包括双轴心旋转机构，所述双轴心旋转机构包括具有第一旋转中心的第一运动臂、具有第二旋转中心的第二运动臂、具有第一圆弧形槽的第一固定滑槽块以及具有第二圆弧形槽的第二固定滑槽块，
    所述第一运动臂包括第一连接件以及连接于所述第一连接件一端的第一圆弧形件，所述第一运动臂的第一连接件远离第一圆弧形件的一端固定于第一机壳内，所述第一运动臂的所述第一圆弧形件卡入至所述第一固定滑槽块的所述第一圆弧形槽中，所述第一圆弧形件与所述第一圆弧形槽相配合；
    所述第二运动臂包括第二连接件以及连接于所述第二连接件一端的第二圆弧形件，所述第二运动臂的第二连接件远离第二圆弧形件的一端固定于所述第二机壳内，所述第二运动臂的所述第二圆弧形件卡入至所述第二固定滑槽块的所述第二圆弧形槽中，所述第二圆弧形件与所述第二圆弧形槽相配合。
  10. 一种可折叠显示装置，其中，所述可折叠显示装置包括第一机壳、第二机壳以及柔性显示面板，
    所述第一机壳和所述第二机壳用于支撑所述柔性显示面板，所述第一机壳与所述第二机壳对置，所述第一机壳围绕第一旋转中心转动，所述第二机壳围绕第二旋转中心转动；
    其中，以所述可折叠显示装置处于展平状态时位于所述第一机壳和所述第二机壳之间的中间位置且垂直于所述第一机壳和所述第二机壳所在平面的直线为y坐标轴，且以所述可折叠显示装置处于展平状态时与所述第一机壳和所述第二机壳靠近所述柔性显示面板的表面位于同一水平面且相交的直线为x坐标轴，所述x坐标轴与所述y坐标轴共平面且垂直相交，所述x坐标轴和所述y坐标轴的交点为坐标原点o，所述x坐标轴、所述y坐标轴以及所述坐标原点o构成xoy坐 标平面，所述第一旋转中心在所述xoy坐标平面的正投影的坐标为(x1，y1)，所述第二旋转中心在所述xoy坐标平面的正投影的坐标为(-x1，y1)；
    所述x1和所述y1之和为预定值，所述x1大于0，所述y1大于-0.3毫米且小于或等于1毫米，所述预定值大于0。
  11. 根据权利要求10所述的可折叠显示装置，其中，所述y1大于或等于-0.1毫米。
  12. 根据权利要求10所述的可折叠显示装置，其中，所述y1小于或等于0.5毫米。
  13. 根据权利要求10所述的可折叠显示装置，其中，所述y1大于或等于-0.1毫米且小于或等于0.3毫米。
  14. 根据权利要求10所述的可折叠显示装置，其中，所述预定值为0.5毫米-3毫米。
  15. 根据权利要求10所述的可折叠显示装置，其中，所述x1为1.9毫米，所述y1为0.1毫米。
  16. 根据权利要求10所述的可折叠显示装置，其中，所述柔性显示面板包括有机发光二极管阵列层，所述有机发光二极管阵列层在所述可折叠显示装置处于展平状态时至所述第一机壳和所述第二机壳靠近所述柔性显示面板的表面的距离大于或等于0.1毫米且小于或等于0.3毫米。
  17. 根据权利要求16所述的可折叠显示装置，其中，在所述可折叠显示装置处于展平状态时，在所述y坐标轴的方向上，
    所述第一旋转中心和所述第二旋转中心位于所述有机发光二极管阵列层的下表面靠近所述第一机壳和所述第二机壳的一侧，且所述第一旋转中心和所述第二旋转中心至所述有机发光二极管阵列层的所述下表面的距离大于或等于0毫米且小于或等于0.243毫米，或，
    所述第一旋转中心和所述第二旋转中心位于所述有机发光二极管阵列层的所述下表面远离所述第一机壳和所述第二机壳的一侧，且所述第一旋转中心和所述第二旋转中心至所述有机发光二极管阵列层的所述下表面的距离大于0毫米且小于或等于0.157毫米，所述有机发光二极管阵列层的下表面为所述有机发光二极管阵列层靠近所述第一机壳和所述第二机壳的表面。
  18. 根据权利要求10所述的可折叠显示装置，其中，所述第一机壳围绕第一旋转中心转动的半径为1毫米-10毫米，所述第二机壳围绕第二旋转中心转动的半径为1毫米-10毫米。
  19. 根据权利要求10所述的可折叠显示装置，其中，所述第一机壳和所述第二机壳同步对称旋转，所述可折叠显示装置包括双轴心旋转机构，所述双轴心旋转机构包括具有第一旋转中心的第一运动臂、具有 第二旋转中心的第二运动臂、具有第一圆弧形槽的第一固定滑槽块以及具有第二圆弧形槽的第二固定滑槽块，
    所述第一运动臂包括第一连接件以及连接于所述第一连接件一端的第一圆弧形件，所述第一运动臂的第一连接件远离第一圆弧形件的一端固定于第一机壳内，所述第一运动臂的所述第一圆弧形件卡入至所述第一固定滑槽块的所述第一圆弧形槽中，所述第一圆弧形件与所述第一圆弧形槽相配合；
    所述第二运动臂包括第二连接件以及连接于所述第二连接件一端的第二圆弧形件，所述第二运动臂的第二连接件远离第二圆弧形件的一端固定于所述第二机壳内，所述第二运动臂的所述第二圆弧形件卡入至所述第二固定滑槽块的所述第二圆弧形槽中，所述第二圆弧形件与所述第二圆弧形槽相配合。
  20. 根据权利要求19所述的可折叠显示装置，其中，所述可折叠显示装置还包括联动机构以及第三机壳，所述第三机壳设置于所述第一机壳和所述第二机壳之间，所述第一固定滑槽块和所述第二固定滑槽块固定于所述第三机壳内，所述联动机构包括第一传动组件、第二传动组件以及齿轮，
    所述第一传动组件包括第一齿条以及设置于第一圆弧形件上的第一滑块，所述第一齿条具有第一端面以及与所述第一端面垂直的第二端面，所述第一端面具有沿传动方向排布的平条齿，所述第二端面设置有第一滑槽，所述第一圆弧形件上的所述第一滑块卡接于所述第一滑槽，所述第一齿条设置于所述第一固定滑槽块的第一导向面上；
    所述第二传动组件包括第二齿条以及设置于第二圆弧形件上的第二滑块，所述第二齿条具有第三端面以及与所述第三端面垂直的第四端面，所述第三端面设置有沿传动方向排布的平条齿，所述第四端面设置有第二滑槽，所述第二圆弧形件上的所述第二滑块卡接于所述第二滑槽，所述第二齿条设置于所述第二固定滑槽块的第二导向面上；所述齿轮转动连接于所述第三机壳上，所述第一齿条沿传动方向排布的平条齿与所述齿轮咬合，所述第二齿条沿传动方向排布的平条齿与所述齿轮咬合。
PCT/CN2020/096350 2020-05-28 2020-06-16 可折叠显示装置 WO2021237822A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/966,023 US11917778B2 (en) 2020-05-28 2020-06-16 Foldable display device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010467288.9 2020-05-28
CN202010467288.9A CN111508375A (zh) 2020-05-28 2020-05-28 可折叠显示装置

Publications (1)

Publication Number Publication Date
WO2021237822A1 true WO2021237822A1 (zh) 2021-12-02

Family

ID=71875186

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/096350 WO2021237822A1 (zh) 2020-05-28 2020-06-16 可折叠显示装置

Country Status (3)

Country Link
US (1) US11917778B2 (zh)
CN (1) CN111508375A (zh)
WO (1) WO2021237822A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113314036B (zh) * 2021-07-30 2022-01-04 武汉华星光电半导体显示技术有限公司 柔性显示面板、电子装置以及铰链
US12019482B2 (en) 2021-07-30 2024-06-25 Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. Flexible display panel, electronic device, and hinge
CN113593416B (zh) * 2021-08-04 2023-02-24 武汉华星光电半导体显示技术有限公司 折叠显示装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017051788A1 (ja) * 2015-09-24 2017-03-30 シャープ株式会社 フレキシブルデバイス
CN209164358U (zh) * 2018-07-13 2019-07-26 Oppo广东移动通信有限公司 折叠装置及电子设备
CN110442196A (zh) * 2019-07-30 2019-11-12 华为技术有限公司 转动机构、折叠显示终端
CN110473468A (zh) * 2018-05-09 2019-11-19 仁宝电脑工业股份有限公司 弯折模块及折叠式显示装置
CN110718155A (zh) * 2019-10-24 2020-01-21 武汉华星光电半导体显示技术有限公司 一种折叠式显示装置
CN210041901U (zh) * 2019-08-30 2020-02-07 Oppo广东移动通信有限公司 电子设备
CN111049954A (zh) * 2019-12-18 2020-04-21 Oppo广东移动通信有限公司 折叠装置及电子设备

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3941933B2 (ja) * 2002-08-26 2007-07-11 松下電器産業株式会社 開閉式の通信端末およびヒンジ装置
TWI533787B (zh) * 2014-04-29 2016-05-11 洪進興 穩定轉動之雙軸轉軸
KR102235171B1 (ko) * 2014-09-01 2021-04-02 엘지디스플레이 주식회사 접이식 디스플레이 장치
WO2016163852A1 (ko) * 2015-04-09 2016-10-13 삼성전자 주식회사 접철식 기기
CN107102692B (zh) * 2017-04-26 2019-08-23 京东方科技集团股份有限公司 折叠式显示装置
KR102533904B1 (ko) * 2017-11-28 2023-05-19 삼성전자주식회사 접이식 플렉서블 디스플레이 장치
KR102233336B1 (ko) * 2018-08-14 2021-03-29 에이피시스템 주식회사 벤딩 장치 및 벤딩 방법
CN110992838B (zh) * 2020-01-03 2022-01-04 武汉华星光电半导体显示技术有限公司 可折叠显示装置及其制造方法
CN212365385U (zh) * 2020-05-28 2021-01-15 武汉华星光电半导体显示技术有限公司 可折叠显示装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017051788A1 (ja) * 2015-09-24 2017-03-30 シャープ株式会社 フレキシブルデバイス
CN110473468A (zh) * 2018-05-09 2019-11-19 仁宝电脑工业股份有限公司 弯折模块及折叠式显示装置
CN209164358U (zh) * 2018-07-13 2019-07-26 Oppo广东移动通信有限公司 折叠装置及电子设备
CN110442196A (zh) * 2019-07-30 2019-11-12 华为技术有限公司 转动机构、折叠显示终端
CN210041901U (zh) * 2019-08-30 2020-02-07 Oppo广东移动通信有限公司 电子设备
CN110718155A (zh) * 2019-10-24 2020-01-21 武汉华星光电半导体显示技术有限公司 一种折叠式显示装置
CN111049954A (zh) * 2019-12-18 2020-04-21 Oppo广东移动通信有限公司 折叠装置及电子设备

Also Published As

Publication number Publication date
CN111508375A (zh) 2020-08-07
US11917778B2 (en) 2024-02-27
US20230180408A1 (en) 2023-06-08

Similar Documents

Publication Publication Date Title
WO2021237822A1 (zh) 可折叠显示装置
CN212365385U (zh) 可折叠显示装置
TWI722575B (zh) 包括具有齒輪連桿及滑動件之樞紐機構的顯示裝置
US11259419B2 (en) Display device and method of fabricating the same
KR101400284B1 (ko) 폴딩형 멀티 디스플레이 장치
JP2022003557A (ja) 情報処理装置
EP3961348A1 (en) Display device
US11636785B2 (en) Display device and method of providing the same
US20210144871A1 (en) Display device
CN109545826A (zh) 一种显示面板、其制造方法及包含其的显示装置
WO2023273574A1 (zh) 一种转动机构、支撑装置以及折叠屏终端
US11266030B2 (en) Foldable display device
US20230240029A1 (en) Foldable display device and supporting assembly thereof
CN107994050A (zh) 显示装置
WO2022056783A1 (zh) 触控面板、触控显示面板和电子装置
US7024729B2 (en) Rotation apparatus
US11797046B2 (en) Electronic device
US20210326005A1 (en) Display device
WO2020228506A1 (zh) 终端设备
CN109633806B (zh) 背光模组及显示装置
US20240032226A1 (en) Hinge, flexible display panel and electronic device
CN112927622A (zh) 可折叠显示屏和显示装置
US10825837B2 (en) Substrate processing apparatus and display device using the same
US9952374B2 (en) Display device
US12033545B2 (en) Display device and method of providing the same

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20937381

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20937381

Country of ref document: EP

Kind code of ref document: A1