WO2022012270A1 - 柔性显示面板及其制备方法、显示装置、显示模组 - Google Patents

柔性显示面板及其制备方法、显示装置、显示模组 Download PDF

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Publication number
WO2022012270A1
WO2022012270A1 PCT/CN2021/101016 CN2021101016W WO2022012270A1 WO 2022012270 A1 WO2022012270 A1 WO 2022012270A1 CN 2021101016 W CN2021101016 W CN 2021101016W WO 2022012270 A1 WO2022012270 A1 WO 2022012270A1
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WIPO (PCT)
Prior art keywords
area
hole group
display panel
flexible display
hole
Prior art date
Application number
PCT/CN2021/101016
Other languages
English (en)
French (fr)
Inventor
王亚明
陈立强
赵东东
王作家
刘雪燕
李旭
Original Assignee
京东方科技集团股份有限公司
成都京东方光电科技有限公司
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.)
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Application filed by 京东方科技集团股份有限公司, 成都京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US17/801,805 priority Critical patent/US11922843B2/en
Publication of WO2022012270A1 publication Critical patent/WO2022012270A1/zh
Priority to US18/414,470 priority patent/US20240153419A1/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/03—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes specially adapted for displays having non-planar surfaces, e.g. curved displays
    • G09G3/035—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes specially adapted for displays having non-planar surfaces, e.g. curved displays for flexible display surfaces
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • G—PHYSICS
    • G06—COMPUTING; 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
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a flexible display panel and a method for preparing the flexible display panel, a display device including the flexible display panel, and a display module including the flexible display panel.
  • OLED Organic Light-Emitting Diode, organic light-emitting diode
  • the profiling of the flexible display is often insufficient when the four sides of the OLED flexible display are curved, and the four corners of the flexible display will be lifted, resulting in the flexible display and the cover.
  • Pre-contact occurs, that is, the edge of the flexible display screen contacts the cover first, and then contacts internally, forming air bubbles. In this way, after lamination and defoaming, cracks are also likely to occur, resulting in poor lamination.
  • the purpose of the present disclosure is to provide a flexible display panel and a manufacturing method of the flexible display panel, a display device including the flexible display panel, and a display module including the flexible display panel, thereby at least to a certain extent overcome the above-mentioned problems of the prior art. Cracks and wrinkles are prone to deficiencies.
  • a flexible display panel comprising:
  • a first bending area connected to the first edge of the plane area along a first direction;
  • the second bending area is connected to the second edge of the plane area along a second direction, and the second direction and the first direction form a set angle;
  • the corner bending area is connected to the corner of the plane area, and is connected between the first bending area and the second bending area, and the corner bending area is provided with a plurality of groups of first bending areas.
  • a hole group, the width of the first hole group located in the middle of the corner bending area increases after the corner bending area is bent, and the width of the first hole group located in the corner bending area is one area away from the plane area.
  • the width of the first hole group of the side edge regions is reduced.
  • multiple groups of the first hole groups are arranged to form multiple rows, and the arrangement direction of each row of the first hole groups is related to the area away from the plane of the corner bending area The extension direction of the edge on one side is the same.
  • the corner bending area is set in a fan shape or a partial annular shape
  • the first hole group is set in a strip shape
  • the length direction of the first hole group is the same as the The radial directions of the corner bending regions are consistent
  • at least one pixel is arranged on both sides of the first hole group in the width direction.
  • the first centerlines of the two radially adjacent first hole groups are located in the same radial direction or are arranged at a different position, and the extension direction of the first centerlines is the same as that of all the first hole groups.
  • the length direction of the first hole group is the same.
  • a plurality of groups of second hole groups are further arranged in the corner bending region, the second hole groups are arranged in a strip shape, and the first hole group of the second hole group is arranged in a strip shape.
  • the two center lines are consistent with the radial direction, the extension direction of the second center line is consistent with the width direction of the second hole group, and the corner bending area is located in the corner of the corner bending area after bending.
  • the width of the second hole group in the middle part increases, and the width of the second hole group in the edge region of the corner bending region increases.
  • multiple groups of the second hole groups are arranged to form multiple rows, and the arrangement direction of each row of the second hole groups is related to the area away from the plane of the corner bending area The extension direction of the edge on one side is the same.
  • the second centerlines of the two second hole groups that are adjacent in the radial direction are located in the same radial direction or are arranged in a staggered position.
  • the width of the first hole group in the middle and edge regions of the corner bending region is greater than the width of the first hole group in the remaining part;
  • the width of the second hole group in the middle and edge regions of the corner bending region is larger than the width of the second hole group in the remaining part.
  • the density of the first hole group in the middle and edge regions of the corner bending region is greater than the density of the first hole group in the remaining part;
  • the density of the second hole group in the middle and edge regions of the corner bending region is greater than the density of the second hole group in the remaining portion.
  • the two tangentially adjacent first hole groups and the radially adjacent two second hole groups surround to form a trapezoid.
  • the first hole group includes a first hole, and the cross-sectional shape of the first hole is a rectangle, an ellipse or a trapezoid;
  • the second hole group includes a second hole A hole, the cross-sectional shape of the second hole is a rectangle, an ellipse or a trapezoid.
  • the first hole group includes a plurality of first holes, the plurality of first holes are arranged along a length direction of the first hole group, and the first holes are
  • the cross-sectional shape is a circle, a rectangle or an ellipse
  • the second hole group includes a plurality of second holes, the plurality of second holes are arranged along the length direction of the second hole group, and the cross section of the second hole
  • the shape is circle, rectangle or oval.
  • the first hole group includes a plurality of first holes, the plurality of first holes are arranged along a width direction of the first hole group, and the first holes are The cross-sectional shape is a rectangle or an ellipse;
  • the second hole group includes a plurality of second holes, the plurality of second holes are arranged along the width direction of the second hole group, and the cross-sectional shape of the second holes is a rectangle or oval.
  • the width of the second hole group is greater than or equal to 5 ⁇ m and less than or equal to 20 ⁇ m
  • the length is greater than or equal to 100 ⁇ m and less than or equal to 1000 ⁇ m
  • the depth is greater than or equal to 20 ⁇ m and less than or equal to 60 ⁇ m
  • radially adjacent The distance between the two second hole groups is greater than or equal to 150 ⁇ m and less than or equal to 1200 ⁇ m
  • the distance between the two tangentially adjacent second hole groups is greater than or equal to 150 ⁇ m and less than or equal to 1200 ⁇ m.
  • the first group of holes is located on a side of the anti-crack dam away from the display area
  • the second group of holes is located on a side of the anti-crack dam away from the display area.
  • the width of the first hole group is greater than or equal to 5 ⁇ m and less than or equal to 20 ⁇ m
  • the length is greater than or equal to 100 ⁇ m and less than or equal to 1000 ⁇ m
  • the depth is greater than or equal to 20 ⁇ m and less than or equal to 60 ⁇ m
  • radially adjacent The distance between the two first hole groups is greater than or equal to 150 ⁇ m and less than or equal to 1200 ⁇ m
  • the distance between the two tangentially adjacent first hole groups is greater than or equal to 150 ⁇ m and less than or equal to 1200 ⁇ m.
  • the first hole group close to the edge of the flexible display panel communicates with the edge of the flexible display panel, so that the edge of the flexible display panel forms a plurality of notches.
  • a display device comprising: the flexible display panel according to any one of the above.
  • a manufacturing method of a flexible display panel which is used for manufacturing the flexible display panel described in any one of the above, and the manufacturing method includes:
  • a plurality of groups of first hole groups are formed in the corner bending area through two etching processes, and the corner bending area is located in the corner bending area after being bent
  • the width of the first hole group in the middle of the folded region increases, and the width of the first hole group in the edge region of the corner folded region decreases.
  • a display module comprising:
  • a plane carrying area which is used to carry the plane area of the flexible display panel
  • the first bending bearing area is connected to the first edge of the plane bearing area along the first direction, and is used for bearing the first bending area of the flexible display panel;
  • the second bending bearing area is connected to the second edge of the plane bearing area along the second direction, and is used for supporting the second bending area of the flexible display panel, and the second direction and the first direction are at a set angle;
  • the corner bending bearing area is connected to the corner of the plane bearing area, and an interval space is set between the first bending bearing area and the second bending bearing area for carrying the corner of the flexible display panel Bend area.
  • FIG. 1 is a schematic diagram of the stress distribution simulation of the corner bending area after the flexible display panel lamination is completed in the related art
  • FIG. 2 is a schematic diagram of the force analysis in the middle of the corner bending area after the flexible display panel is laminated in the related art
  • FIG. 3 is a schematic diagram of the force analysis in the middle of the corner bending area after the flexible display panel is laminated in the related art
  • FIG. 4 is a schematic structural diagram of a first exemplary embodiment of the flexible display panel of the present invention.
  • Fig. 5 is the partial enlarged structural schematic diagram of the corner bending area in Fig. 4;
  • FIG. 6 is a schematic structural diagram of a second exemplary embodiment of the corner bending region of the flexible display panel of the present invention.
  • FIG. 7 is a schematic structural diagram of a third exemplary embodiment of the corner bending region of the flexible display panel of the present invention.
  • FIG. 8 is a schematic structural diagram of a fourth exemplary embodiment of the corner bending region of the flexible display panel of the present invention.
  • FIG. 9 is a schematic structural diagram of a fifth exemplary embodiment of the corner bending region of the flexible display panel of the present invention.
  • FIG. 10 is a schematic structural diagram of a sixth exemplary embodiment of the corner bending region of the flexible display panel of the present invention.
  • FIG. 11 is a schematic diagram of the stress state of the middle and edge area hole groups in the corner bending area of the flexible display panel according to the present invention.
  • 12-16 are schematic structural diagrams of various exemplary embodiments in which the first hole group and the second hole group of the flexible display panel of the present invention include one hole;
  • FIG. 17 is a schematic structural diagram of an exemplary embodiment in which the first hole group and the second hole group include a plurality of holes;
  • FIG. 18 is a schematic structural diagram of another exemplary embodiment in which the first hole group and the second hole group include a plurality of holes;
  • FIG. 19 is a schematic diagram of strain distribution simulation after the corner bending area of an unpunched flexible display panel is laminated
  • 20 is a schematic diagram of strain distribution simulation after the flexible display panel of the present invention is provided with the corner bending area of the first hole group after lamination is completed;
  • 21 is a schematic diagram of strain distribution simulation after the flexible display panel of the present invention is provided with the first hole group and the second hole group in the corner bending area after the bonding is completed;
  • 22 is a schematic cross-sectional view of the flexible display panel of the present invention.
  • FIG. 23 is a schematic structural diagram of an exemplary embodiment of the carrier film in the display module of the present invention.
  • FIG. 24 is a schematic diagram of the comparative structure of the edge position of the flexible display panel with or without the tension of the bearing film;
  • FIG. 25 is a schematic cutaway view of FIG. 24 .
  • Example embodiments will now be described more fully with reference to the accompanying drawings.
  • Example embodiments can be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
  • the same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.
  • the figure shows that the maximum tensile stress is concentrated in the middle area of the corner bending area 3 of the flexible display panel.
  • the figure shows that the force is divided into a radial force F1 and a tangential force F2.
  • the figure shows that the maximum compressive stress is concentrated in the edge area of the corner bending area 3 of the flexible display panel.
  • the radial force F1 received by the edge region of the corner bending region 3 is a tensile force
  • the tangential force F2 received is a pressure force.
  • the flexible display panel may include a flat area 1 , a first bending area 21 , a Two bending areas 22 and corner bending areas 3; the first bending area 21 is connected to the first edge of the plane area 1 along the first direction; the second bending area 22 is connected to the plane along the second direction The second edge of the area 1, the second direction and the first direction are at a set angle; the corner bending area 3 is connected to the corner of the plane area 1, and is connected to the first bending area 21 and the second bending area 22, the corner bending area 3 is provided with a plurality of groups of first hole groups 5, and the corner bending area is located in the middle of the corner bending area 3 after being bent The width of the first hole group 5 increases, and the width of the first hole group 5 located at the edge region of the corner bending region 3 away from the plane region 1 decreases.
  • the edge region of the corner bending region 3 refers to the region of the corner bending region 3 that is remote from the circular arc-shaped edge of the plane region 1 .
  • Tangential is the direction perpendicular to the radial direction.
  • the flexible display panel may be set as a rectangle with rounded corners, and four sides and four corners of the flexible display panel are all bent to form a curved surface.
  • the flexible display panel may include a flat area 1 in the middle, and the flat area 1 is also set as a rectangle with rounded corners.
  • Flat area 1 has four straight edges and four arcuate edges. The four straight edges can be two long edges and two wide edges.
  • the first bending area 21 may be a long-side bending area, the first edge may be the long edge of the planar area 1 , and the first direction may be the length direction of the planar area 1 .
  • the two first bending regions 21 are connected to the two first edges of the planar region 1 along the first direction, that is, the two first bending regions 21 are connected to the two long edges of the planar region 1 along the length direction.
  • the second bending area 22 may be a broad-side bending area, the second edge may be the broad edge of the planar area 1 , and the second direction may be the width direction of the planar area 1 .
  • the two second bending regions 22 are connected to the two second edges of the planar region 1 along the second direction, that is, the two second bending regions 22 are connected to the two broad edges of the planar region 1 along the width direction.
  • the width of the first bending area 21 and the second bending area 22 are the same, the length of the first bending area 21 is the same as that of the first edge, and the length of the second bending area 22 is the same as the length of the second edge.
  • the flexible display panel may be configured in a right-angled rectangle, a rounded square, a right-angled square, etc., and may also be configured in a trapezoidal shape, a parallelogram, and the like as required.
  • the corner bending area 3 is connected to the corner of the plane area 1, that is, the corner bending area 3 is connected to the arc edge of the plane area 1, and the corner bending area 3 is connected to the first Between the bending area 21 and the second bending area 22 .
  • the corner bending area 3 is set as a quarter circle, the inner ring of the corner bending area 3 is connected to the arc edge of the plane area 1, and the two straight edges of the corner bending area 3 are connected The edges are respectively connected to the first bending area 21 and the second bending area 22 .
  • the length of the straight side of the corner bending area 3 is the same as the width of the first bending area 21 and the second bending area 22, so that the outer ring of the corner bending area 3 is the same as the first bending area 21 and the second bending area.
  • the tangential and smooth transitions between the bending regions 22 are formed.
  • the corner bending region 3 may also be set to be a square with no corners.
  • the flexible display panel can be set in a right-angled rectangle, a right-angled square, a trapezoid, a parallelogram, etc.
  • the corner bending area 3 can be set in a fan shape, a parallelogram or a square shape.
  • a plurality of groups of first hole groups 5 are provided in the corner bending region 3 , and the first hole groups 5 may be through holes or blind holes.
  • Multiple groups of the first hole groups 5 can be arranged to form three rows, and the arrangement direction of each row of the first hole groups 5 can be consistent with the extension direction of the edge of the corner bending area 3 away from the plane area 1 side, that is, each row of the first hole group 5.
  • the hole groups 5 can be arranged to form a circular arc.
  • multiple groups of first hole groups 5 are arranged to form two, four, five or more rows; the arrangement direction of each row of first hole groups 5 can also be aligned with the edge of the connecting plane region 1 of the corner bending region 3 extension direction is the same.
  • the first hole group 5 is arranged in a strip shape, so that the first hole group 5 has a length direction and a width direction, and the width direction is perpendicular to the length direction, that is, no matter whether the first hole group 5 includes one hole or multiple holes, the first hole group 5 has a length direction and a width direction.
  • the overall shape formed by a hole group 5 is a long strip; the length direction of the first hole group 5 is consistent with the radial direction of the corner bending area 3, that is, the length direction of the first hole group 5 is along the corner bending area 3. Radial settings.
  • One pixel 4 is arranged on both sides of the first hole group 5 in the width direction, that is, at least one pixel 4 is disposed between two adjacent first hole groups 5 in the direction perpendicular to the radial direction.
  • the first hole group 5 ie, the first hole 51
  • the first hole group 5 located in the middle of the corner bending area 3 is tangentially stretched and expanded to make the first hole group 5 .
  • the width increases, and the first hole group 5 (ie, the first holes 51 ) located in the edge region of the corner bending region 3 is tangentially compressed and shrunk, so that the width of the first hole group 5 decreases.
  • the first hole group close to the edge of the flexible display panel is communicated with the edge of the flexible display panel, so that a plurality of notches are formed on the edge of the flexible display panel. That is, the first hole group close to the edge of the flexible display panel is an opening hole, and the side wall of the hole has an opening. Avoid wrinkles on the edges of the flexible display panel.
  • the first hole group close to the edge of the flexible display panel may not be connected to the edge of the flexible display panel.
  • two or more pixels 4 can be arranged on both sides of the first hole group 5 in the width direction, and also can be arranged between two tangentially adjacent first hole groups 5 No pixel 4 is provided, that is, two first hole groups 5 are provided between two adjacent pixels 4 .
  • the longitudinal direction of the first hole group 5 may also be inconsistent with the radial direction of the corner bending region 3, and may be slightly inclined relative to the radial direction, and the inclination angle may be less than or equal to 30 degrees.
  • the width of the first hole group 5 located in the middle of the corner bending area 3 and the first hole group located in the edge area of the corner bending area 3 The width of 5 is greater than the width of the rest of the first hole group 5 . Since the middle part of the corner bending region 3 is subjected to a large tensile force after being bent, the width of the first hole group 5 is set to be large, and the width of the first hole group 5 may be 10-20 ⁇ m. Since the edge region of the corner bending region 3 is subjected to a higher pressure after being bent, the width of the first hole group 5 in this region is set larger, and the width of the first hole group 5 may be 10-20 micrometers.
  • the density of the first hole group 5 in the middle and edge regions of the corner bending region 3 is greater than that of the rest of the first hole group 5 . Since the tensile stress in the middle of the corner bending region 3 is large, and the compressive stress in the edge region of the corner bending region 3 is large, the density of the first hole group 5 in the middle and the edge region of the corner bending region 3 is set to If it is larger, the density of the first hole group 5 can be 40 pieces/mm2-100 pieces/mm2. The denser first hole group 5 can reduce the compressive stress in the edge region and the tensile stress in the middle.
  • the first centerlines of the two first hole groups 5 adjacent in the radial direction may be staggered, that is, staggered; the extension of the first centerlines The direction is consistent with the length direction of the first hole group 5 .
  • the first centerlines of the two first hole groups 5 adjacent in the radial direction may also be located on the same radial direction, so that the first hole groups 5 are arranged in a neat radial direction. A space is left between the two first hole groups 5 adjacent in the radial direction.
  • a plurality of second hole groups 9 are further arranged in the corner bending area, and the plurality of second hole groups 9 are arranged to form five rows, and each row has a second hole group 9 .
  • the arrangement direction of the hole groups 9 is consistent with the extension direction of the edge of the corner bending area 3 away from the plane area 1 , that is, the arrangement of each row of the second hole groups 9 forms a circular arc.
  • multiple groups of second hole groups 9 are arranged to form two, three, four, six or more rows; the arrangement direction of each row of second hole groups 9 can also be connected to the connection plane area of the corner bending area 3
  • the extension directions of the edges of 1 are the same.
  • the second hole group 9 is arranged in a strip shape, so that the second hole group 9 has a length direction and a width direction, and the width direction is perpendicular to the length direction, that is, whether the second hole group 9 includes one hole or multiple holes, the first
  • the overall shape formed by the two hole groups 9 is elongated;
  • the second hole groups 9 are arranged in the tangential direction; the two first hole groups adjacent to the tangential direction and the two second hole groups 9 adjacent in the radial direction are surrounded to form a trapezoid, and one pixel is arranged in the trapezoid. pixels.
  • the second hole group 9 located in the middle of the corner bending region 3 is radially stretched and expanded, so that the width of the second hole group 9 increases, and the second hole group 9 is located in the corner bending region 3.
  • the tangential compression of the second hole group 9 in the edge region increases the width of the second hole group 9 .
  • two or more pixels 4 can be arranged on both sides of the second hole group 9 in the width direction, and also can be arranged between two tangentially adjacent second hole groups 9 No pixel 4 is provided, that is, two second hole groups 9 are provided between two adjacent pixels 4 .
  • the width of the second hole group 9 located in the middle of the corner bending area 3 and the width of the second hole group 9 located in the edge area of the corner bending area 3 are larger than the rest of the second hole group. 9 width. Since the middle part of the corner bending region 3 is subjected to a large tensile force after being bent, the width of the second hole group 9 is set to be large, and the width of the second hole group 9 may be 10-20 microns. Since the edge region of the corner bending region 3 is subjected to higher pressure after being bent, the width of the second hole group 9 in this region is set larger, and the width of the second hole group 9 may be 10-20 micrometers.
  • the density of the second hole group 9 in the middle and edge regions of the corner bending region 3 is greater than that of the rest of the second hole group 9 . Because the tensile stress in the middle of the corner bending region 3 is large, and the compressive stress in the edge region of the corner bending region 3 is large, the density of the second hole group 9 in the middle and the edge region of the corner bending region 3 is set to a certain density. If it is larger, the density of the second hole group 9 can be 40 pieces/mm2-100 pieces/mm2. The denser second hole group 9 can reduce the compressive stress in the edge region and the tensile stress in the middle.
  • the second centerlines of the two second hole groups 9 adjacent in the radial direction may be arranged in a staggered arrangement, that is, staggered; the extension direction of the second centerlines is consistent with the width direction of the second hole group 9 .
  • the second centerlines of the two second hole groups 9 adjacent in the radial direction may also be located in the same radial direction, so that the second hole groups 9 are arranged in a neat radial direction.
  • the wires located between two adjacent first hole groups 5 and arranged along the radial direction are arranged in a curve.
  • the wire can be a metal wire or a non-metal wire, which is used to transmit signals for each pixel 4; setting the wire as a curve enhances the stretchability of the wire and reduces the stress after stretching.
  • the metal wire should be designed to be curved when passing through the mesh perforated area to increase the stretchability.
  • the length of the first hole group 5 refers to the maximum dimension of the first hole group 5 in the length direction
  • the width of the first hole group 5 refers to the maximum dimension of the first hole group 5 in the width direction
  • the length of the second hole group 9 refers to the maximum size of the second hole group 9 in the length direction
  • the width of the second hole group 9 refers to the second hole group 9 The maximum size in the width direction.
  • the first hole group and the second hole group include structural schematic diagrams of each example embodiment in which one first hole is included.
  • the first hole group 5 may include a first hole 51, and the cross-sectional shape of the first hole 51 may be a rectangle.
  • the cross-sectional shape of the first hole 51 may be an ellipse, a trapezoid, or the like.
  • the cross-sectional shape of the first hole 51 can also be two symmetrically connected trapezoids, the long bottom sides of the two trapezoids are oppositely arranged, and the short bottom sides are connected; the cross-sectional shape of the first hole 51 can also be two opposite straight lines and two opposite sides.
  • the width of the first hole group 5 may be greater than or equal to 5 ⁇ m and less than or equal to 20 ⁇ m, the length may be greater than or equal to 100 ⁇ m and less than or equal to 1000 ⁇ m, and the depth may be greater than or equal to 20 ⁇ m and less than or equal to 60 ⁇ m, two radially adjacent first hole groups 5 The distance between them may be greater than or equal to 150 ⁇ m and less than or equal to 1200 ⁇ m, and the distance between two tangentially adjacent first hole groups 5 may be greater than or equal to 150 ⁇ m and less than or equal to 1200 ⁇ m.
  • the punching density of the first hole group 5 may be greater than or equal to 4 holes/mm ⁇ 2 and less than or equal to 100 holes/mm ⁇ 2.
  • the second hole group 9 may include a second hole 91, and the cross-sectional shape of the second hole 91 may be a rectangle.
  • the cross-sectional shape of the second hole 91 may be an ellipse, a trapezoid, or the like.
  • the cross-sectional shape of the second hole 91 can also be two symmetrically connected trapezoids, the long bases of the two trapezoids are oppositely arranged, and the short bases are connected; the cross-sectional shape of the second hole 91 can also be two opposite straight lines and two opposite The shape enclosed by the curve, and the two opposite curves are concave to the inside of the hole.
  • the width of the second hole group 9 may be greater than or equal to 5 ⁇ m and less than or equal to 20 ⁇ m, the length may be greater than or equal to 100 ⁇ m and less than or equal to 1000 ⁇ m, the depth may be greater than or equal to 20 ⁇ m and less than or equal to 60 ⁇ m, and two radially adjacent second hole groups 9 The distance between them may be greater than or equal to 150 ⁇ m and less than or equal to 1200 ⁇ m, and the distance between two tangentially adjacent second hole groups 9 may be greater than or equal to 150 ⁇ m and less than or equal to 1200 ⁇ m.
  • the punching density of the second hole group 9 may be greater than or equal to 4 holes/mm ⁇ 2 and less than or equal to 100 holes/mm ⁇ 2.
  • the first hole group 5 may include four first holes 51 , the four first holes 51 are arranged along the length direction of the first hole group 5 , and the cross-sectional shape of the first holes 51 is circular.
  • the first hole group 5 may also include two, three, five or more first holes 51 , and the cross-sectional shape of the first holes 51 may also be a rectangle, an ellipse, or the like.
  • the second hole group 9 may include four second holes 91 , the four second holes 91 are arranged along the length direction of the second hole group 9 , and the cross-sectional shape of the second holes 91 is circular.
  • the second hole group 9 may also include two, three, five or more second holes 91, and the cross-sectional shape of the second holes 91 may also be a rectangle, an ellipse, or the like.
  • the first hole group 5 may include two first holes 51, and the two first holes 51 may be arranged along the width direction of the first hole group 5.
  • the cross-sectional shape of the first hole 51 may also be a rectangle, and the lengths of the two rectangles are the same. , the width can be the same or different.
  • the first hole group 5 may also include three, five or more first holes 51, and the cross-sectional shape of the first holes 51 may also be an ellipse, a parallelogram, or the like.
  • the second hole group 9 may include two second holes 91, and the two second holes 91 may be arranged along the width direction of the second hole group 9.
  • the cross-sectional shape of the second hole 91 may also be a rectangle, and the lengths of the two rectangles are the same. , the width can be the same or different.
  • the second hole group 9 may also include three, five or more second holes 91, and the cross-sectional shape of the second holes 91 may also be an ellipse, a parallelogram, or the like.
  • first hole group 5 and the second hole group 9 may be the same or different; the first hole 51 and the second hole 91 may also be the same or different.
  • the first hole group 5 may be located on the side of the crack prevention dam away from the display area
  • the second hole group 9 may be located on the side of the crack prevention dam away from the display area.
  • the flexible display panel may include a display area and a non-display area arranged around the display area, an anti-crack dam is arranged in the non-display area, and the first hole group 5 and the second hole group 5 are arranged in the non-display area of the corner bending area.
  • the hole group 9, the first hole group 5 and the second hole group 9 are all located on the side of the anti-crack dam away from the display area.
  • the flexible display panel of the present invention is provided with a schematic diagram of strain distribution simulation after the corner bending area 3 of the first hole group is fitted, and the figure shows that the corner bending area 3 is composed of many radial direction. It is composed of small sectors.
  • the wider small sector has a larger elastic modulus and simulates the non-perforated area.
  • the narrower small sector has a smaller elastic modulus and simulates the perforated area.
  • the flexible display panel of the present invention is provided with the first hole group and the second hole group, which is a schematic diagram of the strain distribution simulation after the corner bending area is attached, and the corner bending area 3 has many radial directions.
  • the network structure composed of narrow and long strips intersecting with the tangential direction, the elastic modulus of the network structure is small, and the elastic modulus of the small trapezoid surrounded by the network structure is large. , simulating a non-punch area.
  • the areas of the first hole group 5 and the second hole group 9 bear the large deformation of the flexible display panel, and the deformation of the non-perforated area is small, so as to be protected.
  • the flexible display panel of the present invention absorbs large tensile and compressive strains through the stretchable and compressive deformation characteristics of the first hole group 5, reduces the bonding stress and strain in the non-perforated area of the flexible display panel, and further reduces the flexible display Fitting cracks and folds in the edge area of the panel; and, even if the edge of the flexible display panel contacts the cover first and then the inside, the air will leak out through the first hole group 5 without generating air bubbles.
  • the present exemplary embodiment further provides a display device, and the display device may include the flexible display panel described in any one of the above.
  • the display device may include the flexible display panel described in any one of the above. The specific structure of the flexible display panel has been described in detail above, so it will not be repeated here.
  • the specific type of the display device is not particularly limited, and any type of display device commonly used in the art can be used, such as OLED displays, mobile devices such as mobile phones, wearable devices such as watches, VR devices, etc.
  • the specific purpose of the display device is selected accordingly, and details are not repeated here.
  • the display device also includes other necessary components and components. Taking a display as an example, such as a casing, a circuit board, a power cord, etc., those skilled in the art can use the display device according to the The specific use requirements of the system should be supplemented accordingly, and will not be repeated here.
  • the beneficial effects of the display device provided by the embodiments of the present invention are the same as those of the flexible display panel provided by the above-mentioned embodiments, which are not repeated here.
  • the present exemplary embodiment also provides a method for preparing a flexible display panel, and the method for preparing a flexible display panel may include the following steps:
  • a plurality of groups of first hole groups are formed in the corner bending area through two etching processes, and the first hole group is located in the middle of the corner bending area after the corner bending area is bent
  • the width of the group increases, and the width of the first hole group in the edge region of the corner bend region decreases.
  • the figure only shows the depths of the first hole group 5 and the second hole group 9 , that is, the first hole group 5 and the second hole group 9 pass through those membrane layers, and the plane
  • the area indicated by A in the figure is the punching area
  • the depth of the area A represents the depth of the first hole group 5 and the second hole group 9 .
  • a plurality of first via holes are formed on the layer; then the source and drain electrodes 17 are formed in the display area; the planarization layer 18 is then formed, and then the planarization layer 18 and the flexible substrate 20 in the corner bending area 3 are punched to form a plurality of second via holes or second blind holes; the plurality of second via holes or second blind holes are correspondingly communicated with the plurality of first via holes to form a first hole group 5 and a second hole group 9 .
  • the first hole group 5 and the second hole group 9 may penetrate through all the insulating layers, passivation layers, planarization layers, buffer layers, protective layers, layers located in the corner bending region 3 inter-dielectric layer, etc. After the corner bending area 3 is bent, the width of the first hole group 5 located in the middle of the corner bending area 5 increases, and the width of the first hole group 5 located at the edge area of the corner bending area 3 decreases.
  • the flexible display panel is formed by sequentially forming the anode 19, the pixel intervening layer, the light-emitting layer, the cathode, and the encapsulation layer.
  • this exemplary embodiment also provides a display module, the display module may include a cover plate, a carrier film and the flexible display panel described in any one of the above, and the carrier film is used for the flexible display panel and the cover plate.
  • the flexible display panel is carried during lamination.
  • the carrier film may include a plane bearing area 6 , a first bending bearing area 71 , a second bending bearing area 72 and a corner bending bearing area 8 .
  • the plane bearing area 6 can be used to carry the plane area 1 of the flexible display panel;
  • the first bending bearing area 71 is connected to the edge of the plane bearing area 6 along the first direction, and can be used to carry the first bending area 21 of the flexible display panel
  • the second bending bearing area 72 is connected to the edge of the plane bearing area 6 along the second direction, and is used to carry the second bending area 22 of the flexible display panel, and the second direction is at a set angle with the first direction; the corners are bent
  • the folded bearing area 8 is connected to the corner of the plane bearing area 6, and is provided with a space between the first folded bearing area 71 and the second folded bearing area 72 for carrying the corners of the flexible display panel.
  • the plane bearing area 6 may be set as a rectangle with rounded corners, and the plane bearing area 6 bears the plane area 1 of the flexible display panel without bending.
  • the flat bearing area 6 has four straight edges and four arcuate edges. The four straight edges can be two long edges and two wide edges.
  • the four straight edges of the plane bearing area 6 are connected with two first bending bearing areas 71 and two second bending bearing areas 72 .
  • the first bending bearing area 71 may be a long-side bending bearing area
  • the first edge of the plane bearing area 6 may be the long edge of the plane bearing area 6
  • the first direction may be the length direction of the plane bearing area 6 .
  • the two first bending bearing areas 71 are connected to the two first edges of the plane bearing area 6 along the first direction, that is, the two first bending bearing areas 71 are connected to the two long edges of the plane bearing area 6 along the length direction .
  • the second bending bearing area 72 may be a broad-side bending bearing area, the second edge may be the broad edge of the flat bearing area 6 , and the second direction may be the width direction of the flat bearing area 6 .
  • the two second bending bearing regions 72 are connected to the two second edges of the plane bearing region 6 along the second direction, that is, the two second bending bearing regions 72 are connected to the two broad edges of the plane bearing region 6 along the width direction .
  • the width of the first bending bearing area 71 and the second bending bearing area 72 are the same, the length of the first bending bearing area 71 is the same as that of the first edge, and the length of the second bending bearing area 72 is the same as that of the second edge. same length.
  • the length of the flat carrying area 6 may be equal to the length of the flat carrying area 1
  • the width of the flat carrying area 6 may be equal to the width of the flat carrying area 1 .
  • the length of the first bending bearing area 71 may be equal to or greater than the length of the first bending area 21, and the width of the first bending bearing area 71 may be greater than the width of the first bending area 21, which is convenient for clamping the first bending area with a clip.
  • Fold the carrying area 71 The length of the second bending bearing area 72 may be equal to or greater than the length of the second bending area 22, and the width of the second bending bearing area 72 may be greater than the width of the second bending area 22, which is convenient for clamping the second bending area with a clip. Fold the edge of the carrying area 72 .
  • the plane bearing area 6 can be set to be a right-angled rectangle, a rounded square, a right-angled square, etc. consistent with the flexible display panel, and can also be set to a trapezoidal shape, a parallelogram, etc. as required.
  • the corner bending bearing area 8 is connected to the corner of the plane bearing area 6 , that is, the corner bending bearing area 8 is connected to the arc edge of the plane bearing area 6 .
  • the corner bending bearing area 8 can be set as a rectangle with one side of a curve, the curve is connected to the arc edge of the plane bearing area 6, and the straight edges on both sides of the curve are connected to the first bending area 21 and the second bending area. Region 22 forms an included angle.
  • the length of the corner bending bearing area 8 is greater than the length of the corner bending area 3 , which facilitates clamping the edge of the corner bending bearing area 8 with a clip.
  • the corner bending bearing area 8 can be set as a fan shape, a parallelogram or a square shape.
  • point B is the corner bending area of the flexible display panel when there is no tension of the bearing film, the corner bending area is pasted on the edge of the flexible display panel.
  • the edge position on the spherical surface of the four corners of the cover plate, DA DB, at this time, the edge curve length of the corner bending area is less than the curve length of the corner bending area before fitting, which is compressed and prone to wrinkles; point C is the corner When the bending area has the tensile force of the bearing film, the edge position of the corner bending area when it is attached to the four-corner spherical surface of the cover plate.
  • R1 is the edge radius when the corner bending area is attached to the sphere without the tension of the bearing film
  • R2 It is the circumference radius of the edge when it is attached to the ball when the corner bending area has the tension of the carrier film.
  • the corner bend area is not easily wrinkled after being stretched.
  • the terms “a”, “an”, “the”, “the” and “at least one” are used to indicate the presence of one or more elements/components/etc.; the terms “comprising”, “including” and “Having” is used to indicate an open-ended inclusive meaning and to mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms “first”, “secondary” “ and “Third” etc. are used only as markers, not as restrictions on the number of their objects.

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Abstract

一种柔性显示面板及其制备方法、显示装置、显示模组。柔性显示面板包括平面区域（1）、第一弯折区域（21）、第二弯折区域（22）和角部弯折区域（3）；第一弯折区域（21）沿第一方向连接于平面区域（1）的第一边沿；第二弯折区域（22）沿第二方向连接于平面区域（1）的第二边沿，第二方向与第一方向呈设定角度；角部弯折区域（3）连接于平面区域（1）的拐角处，且连接于第一弯折区域（21）和第二弯折区域（22）之间，角部弯折区域（3）设置有多组第一孔洞组（5），角部弯折区域（3）弯折后位于角部弯折区域（3）的中部的第一孔洞组（5）的宽度增大，位于角部弯折区域（3）的边缘区的第一孔洞组（5）的宽度减小。通过第一孔洞组（5）吸收拉应变和压应变，降低柔性显示面板的贴合裂纹和边缘区褶皱；不会产生气泡。

Description

柔性显示面板及其制备方法、显示装置、显示模组
交叉引用
本公开要求于2020年7月17日提交的申请号为202010690435.9名称为“柔性显示面板及其制备方法、显示装置、显示模组”的中国专利申请的优先权，该中国专利申请的全部内容通过引用全部并入本文。
技术领域
本公开涉及显示技术领域，尤其涉及一种柔性显示面板及柔性显示面板的制备方法、包括该柔性显示面板的显示装置、包括该柔性显示面板的显示模组。
背景技术
随着显示技术的快速发展，电子产品美观化、轻薄化趋势逐渐显现，OLED(OrganicLight-Emitting Diode，有机发光二极管)柔性显示屏曲面贴合也随之快速发展起来。随着OLED柔性显示屏两边曲贴合工艺的日渐成熟，OLED柔性显示屏四边曲贴合日渐受到面板厂商和手机厂商的青睐。
但是，OLED柔性显示屏四边曲贴合有一个技术难点就是角落贴合。随着OLED柔性显示屏进入盖板角落弧区深度的增加，OLED柔性显示屏的受力愈加复杂。OLED柔性显示屏角落贴合后，屏幕四角的中间区域受到较大径向和切向的拉应力，致使最大拉应力比长边、短边最大拉应力更大，更容易产生裂纹。屏幕四角的边缘区域受到较大的切向的压应力，容易产生褶皱。而且由于机构设备及柔性显示面板的设计原因，OLED柔性显示屏四边曲贴合时柔性显示屏仿形往往不充分，柔性显示屏四角会翘起，致使柔性显示屏与盖板贴合时往往会发生提前接触，即柔性显示屏边沿与盖板先接触，然后再内部接触，形成气泡。这样经过贴合、脱泡，也容易产生裂纹，导致贴合不良。
需要说明的是，在上述背景技术部分公开的信息仅用于加强对本公开的背景的理解，因此可以包括不构成对本领域普通技术人员已知的现有技术的信息。
发明内容
本公开的目的在于提供一种柔性显示面板及柔性显示面板的制备方法、包括该柔性显示面板的显示装置、包括该柔性显示面板的显示模组，进而至少在一定程度上克服上述现有技术的容易产生裂纹和褶皱的不足。
根据本公开的一个方面，提供一种柔性显示面板，包括：
平面区域；
第一弯折区域，沿第一方向连接于所述平面区域的第一边沿；
第二弯折区域，沿第二方向连接于所述平面区域的第二边沿，所述第二方向与所述第一方向呈设定角度；
角部弯折区域，连接于所述平面区域的拐角处，且连接于所述第一弯折区域和所述第二弯折区域之间，所述角部弯折区域设置有多组第一孔洞组，所述角部弯折区域弯折后位于所述角部弯折区域的中部的所述第一孔洞组的宽度增大，位于所述角部弯折区域的远离所述平面区域一侧的边缘区的所述第一孔洞组的宽度减小。
在本公开的一种示例性实施例中，多组所述第一孔洞组排列形成多排，各排所述第一孔洞组的排列方向与所述角部弯折区域的远离所述平面区域一侧的边沿的延伸方向一致。
在本公开的一种示例性实施例中，所述角部弯折区域设置为扇形或部分圆环形，所述第一孔洞组设置为长条状，所述第一孔洞组的长度方向与所述角部弯折区域的径向一致，且所述第一孔洞组的宽度方向的两侧至少排布有一个像素。
在本公开的一种示例性实施例中，在径向上相邻的两个所述第一孔洞组的第一中心线位于同一径向上或错位设置，所述第一中心线的延伸方向与所述第一孔洞组的长度方向一致。
在本公开的一种示例性实施例中，在所述角部弯折区域还设置有多组第二孔洞组，所述第二孔洞组设置为长条状，所述第二孔洞组的第二中心线与所述径向一致，所述第二中心线的延伸方向与所述第二孔洞组的宽度方向一致，所述角部弯折区域弯折后位于所述角部弯折区域的中部的所述第二孔洞组的宽度增大，位于所述角部弯折区域的边缘区的所述第二孔洞组的宽度增大。
在本公开的一种示例性实施例中，多组所述第二孔洞组排列形成多排，各排所述第二孔洞组的排列方向与所述角部弯折区域的远离所述平面区域一侧的边沿的延伸方向一致。
在本公开的一种示例性实施例中，在径向上相邻的两个所述第二孔洞组的所述第二中心线位于同一径向上或错位设置。
在本公开的一种示例性实施例中，所述角部弯折区域的中部和边缘区的所述第一孔洞组的宽度大于其余部分的所述第一孔洞组的宽度；和/或
所述角部弯折区域的中部和边缘区的所述第二孔洞组的宽度大于其余部分的所述第二孔洞组的宽度。
在本公开的一种示例性实施例中，所述角部弯折区域的中部和边缘区的所述第一孔洞组的密度大于其余部分的所述第一孔洞组的密度；和/或
所述角部弯折区域的中部和边缘区的所述第二孔洞组的密度大于其余部分的所述第 二孔洞组的密度。
在本公开的一种示例性实施例中，切向相邻的两个所述第一孔洞组与径向相邻的两个所述第二孔洞组围绕形成梯形。
在本公开的一种示例性实施例中，所述第一孔洞组包括一个第一孔洞，所述第一孔洞的截面形状为矩形、椭圆形或梯形；所述第二孔洞组包括一个第二孔洞，所述第二孔洞的截面形状为矩形、椭圆形或梯形。
在本公开的一种示例性实施例中，所述第一孔洞组包括多个第一孔洞，多个所述第一孔洞沿所述第一孔洞组的长度方向排列，所述第一孔洞的截面形状为圆形、矩形或椭圆形；所述第二孔洞组包括多个第二孔洞，多个所述第二孔洞沿所述第二孔洞组的长度方向排列，所述第二孔洞的截面形状为圆形、矩形或椭圆形。
在本公开的一种示例性实施例中，所述第一孔洞组包括多个第一孔洞，多个所述第一孔洞沿所述第一孔洞组的宽度方向排列，所述第一孔洞的截面形状为矩形或椭圆形；所述第二孔洞组包括多个第二孔洞，多个所述第二孔洞沿所述第二孔洞组的宽度方向排列，所述第二孔洞的截面形状为矩形或椭圆形。
在本公开的一种示例性实施例中，所述第二孔洞组的宽度大于等于5μm且小于等于20μm、长度大于等于100μm且小于等于1000μm、深度大于等于20μm且小于等于60μm，径向相邻的两个所述第二孔洞组之间的间距大于等于150μm且小于等于1200μm，切向相邻的两个所述第二孔洞组之间的间距大于等于150μm且小于等于1200μm。
在本公开的一种示例性实施例中，所述第一孔洞组位于防裂缝坝的远离显示区域的一侧，所述第二孔洞组位于防裂缝坝的远离显示区域的一侧。
在本公开的一种示例性实施例中，所述第一孔洞组的宽度大于等于5μm且小于等于20μm、长度大于等于100μm且小于等于1000μm、深度大于等于20μm且小于等于60μm，径向相邻的两个所述第一孔洞组之间的间距大于等于150μm且小于等于1200μm，切向相邻的两个所述第一孔洞组之间的间距大于等于150μm且小于等于1200μm。
在本公开的一种示例性实施例中，靠近所述柔性显示面板的边沿的第一孔洞组连通至所述柔性显示面板的边沿，以使所述柔性显示面板的边沿形成多个缺口。
根据本公开的一个方面，提供一种显示装置，包括：上述任意一项所述的柔性显示面板。
根据本公开的一个方面，提供一种柔性显示面板的制备方法，用于制备上述任意一项所述的柔性显示面板，所述制备方法包括：
在形成所述柔性显示面板的工艺之中，通过两次刻蚀工艺在所述角部弯折区域形成多组第一孔洞组，所述角部弯折区域弯折后位于所述角部弯折区域的中部的所述第一孔 洞组的宽度增大，位于所述角部弯折区域的边缘区的所述第一孔洞组的宽度减小。
根据本公开的一个方面，提供一种显示模组，包括：
盖板；
上述任意一项所述的柔性显示面板；
承载膜，用于在所述柔性显示面板与所述盖板贴合时承载所述柔性显示面板，所述承载膜包括：
平面承载区域，用于承载所述柔性显示面板的平面区域；
第一弯折承载区域，沿第一方向连接于平面承载区域的第一边沿，用于承载所述柔性显示面板的第一弯折区域；
第二弯折承载区域，沿第二方向连接于平面承载区域的第二边沿，用于承载所述柔性显示面板的第二弯折区域，第二方向与第一方向呈设定角度；
角部弯折承载区域，连接于平面承载区域的拐角处，且与第一弯折承载区域和第二弯折承载区域之间均设置有间隔空间，用于承载所述柔性显示面板的角部弯折区域。
本公开的其他特性和优点将通过下面的详细描述变得显然，或部分地通过本公开的实践而习得。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。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是相关技术中柔性显示面板贴合完成后角部弯折区域的应力分布仿真示意图；
图2是相关技术中柔性显示面板贴合完成后角部弯折区域的中部受力分析示意图；
图3是相关技术中柔性显示面板贴合完成后角部弯折区域的中部受力分析示意图；
图4是本发明柔性显示面板第一示例实施方式的结构示意图；
图5是图4中角部弯折区域的局部放大结构示意图；
图6是本发明柔性显示面板的角部弯折区域第二示例实施方式的结构示意图；
图7是本发明柔性显示面板的角部弯折区域第三示例实施方式的结构示意图；
图8是本发明柔性显示面板的角部弯折区域第四示例实施方式的结构示意图；
图9是本发明柔性显示面板的角部弯折区域第五示例实施方式的结构示意图；
图10是本发明柔性显示面板的角部弯折区域第六示例实施方式的结构示意图；
图11是本发明柔性显示面板贴合后角部弯折区域的中部和边缘区孔洞组受力状态示意图；
图12-图16是本发明柔性显示面板的第一孔洞组和第二孔洞组包括一个孔洞的各个示例实施方式的结构示意图；
图17是第一孔洞组和第二孔洞组包括多个孔洞的一示例实施方式的结构示意图；
图18是第一孔洞组和第二孔洞组包括多个孔洞的另一示例实施方式的结构示意图；
图19是未打孔的柔性显示面板的角部弯折区域贴合完成后应变分布仿真示意图；
图20是本发明的柔性显示面板设置有第一孔洞组的角部弯折区域贴合完成后应变分布仿真示意图；
图21是本发明的柔性显示面板设置有第一孔洞组和第二孔洞组的角部弯折区域贴合完成后应变分布仿真示意图；
图22是本发明的柔性显示面板的剖视示意图；
图23是本发明显示模组中承载膜一示例实施方式的结构示意图；
图24是有无承载膜拉力时柔性显示面板边沿位置的对比结构示意图；
图25是图24的剖切示意图。
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的实施方式；相反，提供这些实施方式使得本发明将全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。图中相同的附图标记表示相同或类似的结构，因而将省略它们的详细描述。
参照图1所示的相关技术中柔性显示面板贴合完成后角部弯折区域3的应力分布仿真示意图，图中显示最大拉应力集中在柔性显示面板的角部弯折区域3的中部区域。参照图2所示的相关技术中柔性显示面板贴合完成后角部弯折区域3的中部受力分析示意图，图中显示受力分为径向力F1和切向力F2。参照图3所示的相关技术中柔性显示面板贴合完成后角部弯折区域3的中部受力分析示意图，图中显示最大压应力集中在柔性显示面板的角部弯折区域3的边缘区域，角部弯折区域3的边缘区域受到的径向力F1为拉力，受到的切向力F2为压力。
本示例实施方式首先提供了一种柔性显示面板，参照图4所示的本发明柔性显示面板一示例实施方式的结构示意图；该柔性显示面板可以包括平面区域1、第一弯折区域21、第二弯折区域22和角部弯折区域3；第一弯折区域21沿第一方向连接于所述平面 区域1的第一边沿；第二弯折区域22沿第二方向连接于所述平面区域1的第二边沿，所述第二方向与所述第一方向呈设定角度；角部弯折区域3连接于所述平面区域1的拐角处，且连接于所述第一弯折区域21和所述第二弯折区域22之间，所述角部弯折区域3设置有多组第一孔洞组5，角部弯折区域弯折后位于所述角部弯折区域3的中部的所述第一孔洞组5的宽度增大，且位于所述角部弯折区域3的远离所述平面区域1一侧的边缘区的所述第一孔洞组5的宽度减小。
在本示例实施方式中，角部弯折区域3的边缘区指的是角部弯折区域3的远离平面区域1的圆弧形边缘的区域。切向就是与径向垂直的方向。
在本示例实施方式中，柔性显示面板可以设置为圆角长方形，柔性显示面板的四个边和四个拐角都要进行弯折形成曲面。
柔性显示面板可以包括位于中间的平面区域1，平面区域1也设置为圆角长方形。平面区域1具有四个直边沿和四个圆弧边沿。四个直边沿可以是两个长边沿和两个宽边沿。
在平面区域1的四个直边沿对应连接有两个第一弯折区域21和两个第二弯折区域22。第一弯折区域21可以是长边弯折区域，第一边沿可以为平面区域1的长边沿，第一方向可以为平面区域1的长度方向。两个第一弯折区域21沿第一方向连接于平面区域1的两个第一边沿，即两个第一弯折区域21沿长度方向连接于平面区域1的两个长边沿。第二弯折区域22可以是宽边弯折区域，第二边沿可以为平面区域1的宽边沿，第二方向可以为平面区域1的宽度方向。两个第二弯折区域22沿第二方向连接于平面区域1的两个第二边沿，即两个第二弯折区域22沿宽度方向连接于平面区域1的两个宽边沿。
第一弯折区域21和第二弯折区域22的宽度相同，第一弯折区域21的长度与第一边沿的长度相同，第二弯折区域22的长度与第二边沿的长度相同。
当然，可以理解的是，柔性显示面板可以设置为直角长方形、圆角正方形、直角正方形等等，还可以根据需要设置成梯形、平行四边形等等。
在本示例实施方式中，角部弯折区域3连接于平面区域1的拐角处，即角部弯折区域3连接于平面区域1的圆弧边沿，且角部弯折区域3连接于第一弯折区域21和第二弯折区域22之间。具体来说：角部弯折区域3设置为四分之一圆环形，角部弯折区域3的内圆环与平面区域1的圆弧边沿连接，角部弯折区域3的两个直边分别于第一弯折区域21和第二弯折区域22连接。角部弯折区域3的直边的长度与第一弯折区域21和第二弯折区域22的宽度相同，使角部弯折区域3的外圆环与第一弯折区域21和第二弯折区域22之间相切而圆滑过渡。
另外，需要说明的是，角部弯折区域3还可以设置为缺角方形。在柔性显示面板可 以设置为直角长方形、直角正方形、梯形、平行四边形等等的情况下，角部弯折区域3可以设置为扇形、平行四边形或方形。
在本示例实施方式中，参照图5所示，在角部弯折区域3设置有多组第一孔洞组5，第一孔洞组5可以是通孔，也可以是盲孔。多组第一孔洞组5可以排列形成三排，各排第一孔洞组5的排列方向可以与角部弯折区域3的远离平面区域1一侧的边沿的延伸方向一致，即各排第一孔洞组5可以排列形成圆弧形。当然，多组第一孔洞组5排列形成两排、四排、五排或更多排；各排第一孔洞组5的排列方向也可以与角部弯折区域3的连接平面区域1的边沿的延伸方向一致。
第一孔洞组5设置为长条状，使第一孔洞组5具有一个长度方向和一个宽度方向，宽度方向与长度方向垂直，即无论第一孔洞组5包括一个孔洞还是包括多个孔洞，第一孔洞组5形成的整体形状为长条形；第一孔洞组5的长度方向与角部弯折区域3的径向一致，即第一孔洞组5的长度方向沿角部弯折区域3的径向设置。在第一孔洞组5宽度方向的两侧排布一个像素4，即在与径向垂直的方向上相邻两个第一孔洞组5之间至少设置有一个像素4。参照图11所示，在角部弯折区域3弯折后位于角部弯折区域3的中部的第一孔洞组5(即第一孔洞51)切向受拉扩张使第一孔洞组5的宽度增大，且位于角部弯折区域3的边缘区的第一孔洞组5(即第一孔洞51)切向受压收缩使第一孔洞组5的宽度减小。
在本示例实施方式中，靠近柔性显示面板的边沿的第一孔洞组连通至柔性显示面板的边沿，以使柔性显示面板的边沿形成多个缺口。即靠近柔性显示面板的边沿的第一孔洞组是开口孔，孔的侧壁具有开口。避免柔性显示面板的边沿形成褶皱。当然，靠近柔性显示面板的边沿的第一孔洞组也可以不连通至柔性显示面板的边沿。
另外，需要说明的是，在第一孔洞组5宽度方向的两侧排布可以排布两个或更多个像素4，而且在切向相邻的两个第一孔洞组5之间也可以不设置像素4，即相邻两个像素4之间设置有两个第一孔洞组5。
还有，第一孔洞组5的长度方向也可以与角部弯折区域3的径向不一致，可以相对于径向稍微倾斜设置，倾斜角度可以小于等于30度。
参照图6所示，在本发明的第二示例实施方式中，位于角部弯折区域3的中部的第一孔洞组5的宽度和位于角部弯折区域3的边缘区的第一孔洞组5的宽度大于其余部分的第一孔洞组5的宽度。由于角部弯折区域3的中部折弯后受到的拉力较大，第一孔洞组5的宽度设置较大，第一孔洞组5的宽度可以是10微米-20微米。由于角部弯折区域3的边缘区折弯后受到的压力较大，该区内第一孔洞组5的宽度设置较大，第一孔洞组5的宽度可以是10微米-20微米。
参照图7所示，在本发明的第三示例实施方式中，角部弯折区域3的中部和边缘区的第一孔洞组5的密度大于其余部分的第一孔洞组5的密度。由于角部弯折区域3的中部拉应力大，角部弯折区域3的边缘区压应力大，因此，将角部弯折区域3的中部和边缘区的第一孔洞组5的密度设置的较大，第一孔洞组5的密度可以为40个/mm2-100个/mm2。设置较密的第一孔洞组5可以减小边缘区的压应力和中部的拉应力。
参照图8所示，在本发明的第四示例实施方式中，在径向上相邻的两个第一孔洞组5的第一中心线可以交错排布，即错位设置；第一中心线的延伸方向与第一孔洞组5的长度方向一致。当然，在径向上相邻的两个第一孔洞组5的第一中心线也可以位于同一径向上，使第一孔洞组5在径向上整齐排布。在径向上相邻的两第一孔洞组5之间留有间距。
参照图9所示，在本发明的第五示例实施方式中，在角部弯折区域还设置有多组第二孔洞组9，多组第二孔洞组9排列形成五排，各排第二孔洞组9的排列方向与角部弯折区域3的远离平面区域1一侧的边沿的延伸方向一致，即各排第二孔洞组9的排列形成圆弧形。当然，多组第二孔洞组9排列形成两排、三排、四排、六排或更多排；各排第二孔洞组9的排列方向也可以与角部弯折区域3的连接平面区域1的边沿的延伸方向一致。
第二孔洞组9设置为长条状，使第二孔洞组9具有一个长度方向和一个宽度方向，宽度方向与长度方向垂直，即无论第二孔洞组9包括一个孔洞还是包括多个孔洞，第二孔洞组9形成的整体形状为长条形；第二孔洞组9的第二中心线与径向一致，第二中心线的延伸方向与第二孔洞组9的宽度方向一致。第二孔洞组9沿切向设置；切向相邻的两个第一孔洞组与径向相邻的两个第二孔洞组9围绕形成梯形，在梯形内设置一个像素，当然，可以设置多个像素。在角部弯折区域3弯折后位于角部弯折区域3的中部的第二孔洞组9径向受拉扩张使第二孔洞组9的宽度增大，且位于角部弯折区域3的边缘区的第二孔洞组9切向受压使第二孔洞组9的宽度增大。
另外，需要说明的是，在第二孔洞组9宽度方向的两侧排布可以排布两个或更多个像素4，而且在切向相邻的两个第二孔洞组9之间也可以不设置像素4，即相邻两个像素4之间设置有两个第二孔洞组9。
参照图9所示，位于角部弯折区域3的中部的第二孔洞组9的宽度和位于角部弯折区域3的边缘区的第二孔洞组9的宽度大于其余部分的第二孔洞组9的宽度。由于角部弯折区域3的中部折弯后受到的拉力较大，第二孔洞组9的宽度设置较大，第二孔洞组9的宽度可以是10微米-20微米。由于角部弯折区域3的边缘区折弯后受到的压力较大，该区内第二孔洞组9的宽度设置较大，第二孔洞组9的宽度可以是10微米-20微米。
参照图10所示，在本发明的第六示例实施方式中，角部弯折区域3的中部和边缘区的第二孔洞组9的密度大于其余部分的第二孔洞组9的密度。由于角部弯折区域3的中部拉应力大，角部弯折区域3的边缘区压应力大，因此，将角部弯折区域3的中部和边缘区的第二孔洞组9的密度设置的较大，第二孔洞组9的密度可以为40个/mm2-100个/mm2。设置较密的第二孔洞组9可以减小边缘区的压应力和中部的拉应力。
在径向上相邻的两个第二孔洞组9的第二中心线可以交错排布，即错位设置；第二中心线的延伸方向与第二孔洞组9的宽度方向一致。当然，在径向上相邻的两个第二孔洞组9的第二中心线也可以位于同一径向上，使第二孔洞组9在径向上整齐排布。
在本示例实施方式中，位于相邻两个第一孔洞组5之间且沿所述径向设置的导线设置为曲线。导线可以为金属导线，也可以为非金属导线，用于为各个像素4传输信号；将导线设置为曲线增强导线的可拉伸性，减小拉伸后的应力。也可以是，金属导线经过网状打孔区域时要设计成曲线，增加可拉伸性。
在本示例实施方式中，第一孔洞组5的长度指的是第一孔洞组5在长度方向的最大尺寸，第一孔洞组5的宽度指的是第一孔洞组5在宽度方向的最大尺寸；第二孔洞组9的长度指的是第二孔洞组9在长度方向的最大尺寸，第二孔洞组9的宽度指的是第二孔洞组9在宽度方向的最大尺寸。
在本示例实施方式中，参照图12-图16所示的第一孔洞组和第二孔洞组包括一个第一孔洞的各个示例实施方式的结构示意图。第一孔洞组5可以包括一个第一孔洞51，第一孔洞51的截面形状可以为矩形。当然，在本发明的其他示例实施方式中，第一孔洞51的截面形状可以为椭圆形、梯形等等。第一孔洞51的截面形状还可以是两个对称连接的梯形，两个梯形的长底边相对设置，短底边连接；第一孔洞51的截面形状还可以是两条相对直线和两条相对的曲线围成的形状，且两条相对的曲线向孔内侧凹陷。第一孔洞组5的宽度可以是大于等于5μm且小于等于20μm，长度可以是大于等于100μm且小于等于1000μm，深度可以是大于等于20μm且小于等于60μm，径向相邻两个第一孔洞组5之间的间距可以是大于等于150μm且小于等于1200μm，切向相邻两个第一孔洞组5之间的间距可以是大于等于150μm且小于等于1200μm。第一孔洞组5的打孔密度可以是大于等于4个/mm^2且小于等于100个/mm^2。第二孔洞组9可以包括一个第二孔洞91，第二孔洞91的截面形状可以为矩形。当然，在本发明的其他示例实施方式中，第二孔洞91的截面形状可以为椭圆形、梯形等等。第二孔洞91的截面形状还可以是两个对称连接的梯形，两个梯形的长底边相对设置，短底边连接；第二孔洞91的截面形状还可以是两条相对直线和两条相对的曲线围成的形状，且两条相对的曲线向孔内侧凹陷。第二孔洞组9的宽度可以是大于等于5μm且小于等于20μm，长度可以是 大于等于100μm且小于等于1000μm，深度可以是大于等于20μm且小于等于60μm，径向相邻两个第二孔洞组9之间的间距可以是大于等于150μm且小于等于1200μm，切向相邻两个第二孔洞组9之间的间距可以是大于等于150μm且小于等于1200μm。第二孔洞组9的打孔密度可以是大于等于4个/mm^2且小于等于100个/mm^2。
另外，参照图17所示的第一孔洞组和第二孔洞组包括多个第一孔洞的一示例实施方式的结构示意图。第一孔洞组5可以包括四个第一孔洞51，四个第一孔洞51沿第一孔洞组5的长度方向排列，第一孔洞51的截面形状为圆形。当然，第一孔洞组5还可以包括两个、三个、五个或更多个第一孔洞51，第一孔洞51的截面形状还可以是矩形、椭圆形等等。第二孔洞组9可以包括四个第二孔洞91，四个第二孔洞91沿第二孔洞组9的长度方向排列，第二孔洞91的截面形状为圆形。当然，第二孔洞组9还可以包括两个、三个、五个或更多个第二孔洞91，第二孔洞91的截面形状还可以是矩形、椭圆形等等。
还有，参照图18所示的第一孔洞组和第二孔洞组包括多个第一孔洞的另一示例实施方式的结构示意图。第一孔洞组5可以包括两个第一孔洞51，两个第一孔洞51可以沿第一孔洞组5的宽度方向排列，第一孔洞51的截面形状还可以是矩形，两个矩形的长度相同，宽度可以相同，也可以不相同。当然，第一孔洞组5还可以包括三个、五个或更多个第一孔洞51，第一孔洞51的截面形状还可以是椭圆形、平行四边形等等。第二孔洞组9可以包括两个第二孔洞91，两个第二孔洞91可以沿第二孔洞组9的宽度方向排列，第二孔洞91的截面形状还可以是矩形，两个矩形的长度相同，宽度可以相同，也可以不相同。当然，第二孔洞组9还可以包括三个、五个或更多个第二孔洞91，第二孔洞91的截面形状还可以是椭圆形、平行四边形等等。
另外，可以理解的是，第一孔洞组5和第二孔洞组9可以相同，也可以不同；第一孔洞51和第二孔洞91也是可以相同，也可以不同。
在本示例实施方式中，第一孔洞组5可以位于防裂缝坝的远离显示区域的一侧，第二孔洞组9可以位于防裂缝坝的远离显示区域的一侧。即，柔性显示面板可以包括显示区和设置在显示区周边的非显示区，在非显示区设置有防裂缝坝，在角部弯折区域的非显示区设置有第一孔洞组5和第二孔洞组9，第一孔洞组5和第二孔洞组9均位于防裂缝坝的远离显示区域的一侧。
参照图19所示的未打孔的柔性显示面板的角部弯折区域3贴合完成后应变分布仿真示意图，图中显示应变集中在角部弯折区域3的中间区域。参照图20所示的本发明的柔性显示面板设置有第一孔洞组的角部弯折区域3贴合完成后应变分布仿真示意图，图中显示角部弯折区域3由许多沿径向方向的小扇形构成，较宽的小扇形弹性模量较大，模拟非打孔区域，较窄的小扇形弹性模量较小，模拟打孔区域。贴合完成后，打孔区域承 受了屏幕的大变形，非打孔区域变形较小，从而得到保护。参照图21所示的本发明的柔性显示面板设置有第一孔洞组和第二孔洞组的角部弯折区域贴合完成后应变分布仿真示意图，角部弯折区域3有许多沿径向方向和切向方向相交的窄长条构成的网状结构，网状结构弹性模量较小模拟第一孔洞组5和第二孔洞组9区域，由网状结构包围的小梯形弹性模量较大，模拟非打孔区域。贴合完成后，第一孔洞组5和第二孔洞组9区域承受了柔性显示面板的大变形，非打孔区域变形较小，从而得到保护。
本发明的柔性显示面板通过第一孔洞组5的可拉伸压缩变形的特性来吸收较大的拉应变和压应变，降低柔性显示面板非打孔区的贴合应力和应变，进而降低柔性显示面板的贴合裂纹和边缘区褶皱；而且，即使柔性显示面板的边沿与盖板先接触，然后再是内部接触，空气也会通过第一孔洞组5泄出，不会产生气泡。
进一步的，本示例实施方式还提供了一种显示装置，该显示装置可以包括上述任意一项所述的柔性显示面板。柔性显示面板的具体结构上述已经进行了详细说明，因此，此处不再赘述。
而该显示装置的具体类型不受特别的限制，本领域常用的显示装置类型均可，具体例如OLED显示器、手机等移动装置、手表等可穿戴设备、VR装置等等，本领域技术人员可根据该显示设备的具体用途进行相应地选择，在此不再赘述。
需要说明的是，该显示装置除了柔性显示面板以外，还包括其他必要的部件和组成，以显示器为例，具体例如外壳、电路板、电源线，等等，本领域技术人员可根据该显示装置的具体使用要求进行相应地补充，在此不再赘述。
与现有技术相比，本发明实施例提供的显示装置的有益效果与上述实施例提供的柔性显示面板的有益效果相同，在此不做赘述。
进一步的，本示例实施方式还提供了一种柔性显示面板的制备方法，该制备方法可以包括以下步骤：
在形成柔性显示面板的工艺之中，通过两次刻蚀工艺在角部弯折区域形成多组第一孔洞组，角部弯折区域弯折后位于角部弯折区域的中部的第一孔洞组的宽度增大，位于角部弯折区域的边缘区的第一孔洞组的宽度减小。
具体地，参照图22所示，图中只是表示第一孔洞组5和第二孔洞组9的深度，即表示第一孔洞组5和第二孔洞组9贯穿那些膜层，其在平面上的位置上述已经进行了详细说明此处不再赘述；图中A所指的区域就是打孔区，A区域的深度即表示第一孔洞组5和第二孔洞组9的深度。可以先在玻璃载板10上形成柔性衬底20、阻挡层组11(第一阻挡层、第二阻挡层、缓冲层)、有源层12、第一栅绝缘层13、栅极14、第二栅绝缘层15以及层间介电层16，然后通过第一次掩膜(Etch Bending A MASK，简称EBA MASK) 在角部弯折区域(也就是打孔区A)去除第一栅绝缘层13、第二绝缘层15以及层间介电层16，通过第二次掩膜(Etch Bending B MASK，简称EBB MASK)在角部弯折区域3的第一阻挡层、第二阻挡层和缓冲层上形成多个第一过孔；然后在显示区形成源漏极17；再形成平坦化层18，然后再对在角部弯折区域3的平坦化层18和柔性衬底20进行打孔以形成多个第二过孔或第二盲孔；该多个第二过孔或第二盲孔与多个第一过孔对应连通形成第一孔洞组5和第二孔洞组9。在本发明的其他示例实施方式中，第一孔洞组5和第二孔洞组9可以贯穿所有位于角部弯折区域3的绝缘层、钝化层、平坦化层、缓冲层、保护层、层间介电层等等。角部弯折区域3弯折后位于角部弯折区域5的中部的第一孔洞组5的宽度增大，位于角部弯折区域3的边缘区的第一孔洞组5的宽度减小。
最后，依次形成阳极19、像素介定层、发光层、阴极以及封装层等等就形成了柔性显示面板。
进一步的，本示例实施方式还提供了一种显示模组，该显示模组可以包括盖板、承载膜和上述任意一项所述的柔性显示面板，承载膜用于在柔性显示面板与盖板贴合时承载柔性显示面板。
参照图23所示，该承载膜可以包括平面承载区域6、第一弯折承载区域71、第二弯折承载区域72以及角部弯折承载区域8。平面承载区域6可以用于承载柔性显示面板的平面区域1；第一弯折承载区域71沿第一方向连接于平面承载区域6的边沿，可以用于承载柔性显示面板的第一弯折区域21；第二弯折承载区域72沿第二方向连接于平面承载区域6的边沿，用于承载柔性显示面板的第二弯折区域22，第二方向与第一方向呈设定角度；角部弯折承载区域8连接于平面承载区域6的拐角处，且与第一弯折承载区域71和第二弯折承载区域72之间均设置有间隔空间，用于承载柔性显示面板的角部弯折区域3。
在本示例实施方式中，平面承载区域6可以设置为圆角长方形，平面承载区域6承载柔性显示面板的平面区域1，不进行弯折。平面承载区域6具有四个直边沿和四个圆弧边沿。四个直边沿可以是两个长边沿和两个宽边沿。
平面承载区域6的四个直边沿连接有两个第一弯折承载区域71和两个第二弯折承载区域72。第一弯折承载区域71可以是长边弯折承载区域，平面承载区域6的第一边沿可以为平面承载区域6的长边沿，第一方向可以为平面承载区域6的长度方向。两个第一弯折承载区域71沿第一方向连接于平面承载区域6的两个第一边沿，即两个第一弯折承载区域71沿长度方向连接于平面承载区域6的两个长边沿。第二弯折承载区域72可以是宽边弯折承载区域，第二边沿可以为平面承载区域6的宽边沿，第二方向可以为平面承载区域6的宽度方向。两个第二弯折承载区域72沿第二方向连接于平面承载区域6 的两个第二边沿，即两个第二弯折承载区域72沿宽度方向连接于平面承载区域6的两个宽边沿。
第一弯折承载区域71和第二弯折承载区域72的宽度相同，第一弯折承载区域71的长度与第一边沿的长度相同，第二弯折承载区域72的长度与第二边沿的长度相同。
平面承载区域6的长度可以等于平面区域1的长度，平面承载区域6的宽度可以等于平面区域1的宽度。
第一弯折承载区域71的长度可以等于或大于第一弯折区域21的长度，第一弯折承载区域71的宽度可以大于第一弯折区域21的宽度，方便用夹子夹持第一弯折承载区域71。第二弯折承载区域72的长度可以等于或大于第二弯折区域22的长度，第二弯折承载区域72的宽度可以大于第二弯折区域22的宽度，方便用夹子夹持第二弯折承载区域72的边缘。
当然，可以理解的是，平面承载区域6可以设置为与柔性显示面板一致的直角长方形、圆角正方形、直角正方形等等，还可以根据需要设置成梯形、平行四边形等等。
在本示例实施方式中，角部弯折承载区域8连接于平面承载区域6的拐角处，即角部弯折承载区域8连接于平面承载区域6的圆弧边沿。具体来说：角部弯折承载区域8可以设置为一边为曲线的矩形，曲线与平面承载区域6的圆弧边沿连接，曲线两侧的直线边沿与第一弯折区域21和第二弯折区域22形成一个夹角。角部弯折承载区域8的长度大于角部弯折区域3的长度，方便用夹子夹持角部弯折承载区域8的边缘。
另外，需要说明的是，在平面承载区域6可以设置为直角长方形、直角正方形、梯形、平行四边形等等的情况下，角部弯折承载区域8可以设置为扇形、平行四边形或方形。
参照图24和图25所示的有无承载膜拉力时柔性显示面板边缘位置的对比结构示意图，B点为柔性显示面板的角部弯折区域无承载膜拉力时，角部弯折区域贴在盖板四角球面上时的边缘位置，DA＝DB，此时角部弯折区域边缘曲线长度小于贴合前角部弯折区域曲线长度，表现为受压，容易产生褶皱；C点为角部弯折区域有承载膜拉力时，角部弯折区域贴在盖板四角球面上时的边缘位置，图中R1为角部弯折区域无承载膜拉力时贴在圆球上时边缘半径，R2为角部弯折区域有承载膜拉力时贴在圆球上时边缘圆周半径。角部弯折区域被拉伸后不容易产生褶皱。
上述所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施方式中，如有可能，各实施例中所讨论的特征是可互换的。在上面的描述中，提供许多具体细节从而给出对本发明的实施方式的充分理解。然而，本领域技术人员将意识到，可以实践本发明的技术方案而没有所述特定细节中的一个或更多，或者可以采用其它的方法、 组件、材料等。在其它情况下，不详细示出或描述公知结构、材料或者操作以避免模糊本发明的各方面。
虽然本说明书中使用相对性的用语，例如“上”“下”来描述图标的一个组件对于另一组件的相对关系，但是这些术语用于本说明书中仅出于方便，例如根据附图中所述的示例的方向。能理解的是，如果将图标的装置翻转使其上下颠倒，则所叙述在“上”的组件将会成为在“下”的组件。当某结构在其它结构“上”时，有可能是指某结构一体形成于其它结构上，或指某结构“直接”设置在其它结构上，或指某结构通过另一结构“间接”设置在其它结构上。
本说明书中，用语“一个”、“一”、“该”、“所述”和“至少一个”用以表示存在一个或多个要素/组成部分/等；用语“包含”、“包括”和“具有”用以表示开放式的包括在内的意思并且是指除了列出的要素/组成部分/等之外还可存在另外的要素/组成部分/等；用语“第一”、“第二”和“第三”等仅作为标记使用，不是对其对象的数量限制。
应可理解的是，本发明不将其应用限制到本说明书提出的部件的详细结构和布置方式。本发明能够具有其他实施方式，并且能够以多种方式实现并且执行。前述变形形式和修改形式落在本发明的范围内。应可理解的是，本说明书公开和限定的本发明延伸到文中和/或附图中提到或明显的两个或两个以上单独特征的所有可替代组合。所有这些不同的组合构成本发明的多个可替代方面。本说明书所述的实施方式说明了已知用于实现本发明的最佳方式，并且将使本领域技术人员能够利用本发明。

Claims (20)

  1. 一种柔性显示面板，其中，包括：
    平面区域；
    第一弯折区域，沿第一方向连接于所述平面区域的第一边沿；
    第二弯折区域，沿第二方向连接于所述平面区域的第二边沿，所述第二方向与所述第一方向呈设定角度；
    角部弯折区域，连接于所述平面区域的拐角处，且连接于所述第一弯折区域和所述第二弯折区域之间，所述角部弯折区域设置有多组第一孔洞组，所述角部弯折区域弯折后位于所述角部弯折区域的中部的所述第一孔洞组的宽度增大，位于所述角部弯折区域的远离所述平面区域一侧的边缘区的所述第一孔洞组的宽度减小。
  2. 根据权利要求1所述的柔性显示面板，其中，多组所述第一孔洞组排列形成多排，各排所述第一孔洞组的排列方向与所述角部弯折区域的远离所述平面区域一侧的边沿的延伸方向一致。
  3. 根据权利要求2所述的柔性显示面板，其中，所述角部弯折区域设置为扇形或部分圆环形，所述第一孔洞组设置为长条状，所述第一孔洞组的长度方向与所述角部弯折区域的径向一致，且所述第一孔洞组的宽度方向的两侧至少排布有一个像素。
  4. 根据权利要求3所述的柔性显示面板，其中，在径向上相邻的两个所述第一孔洞组的第一中心线位于同一径向上或错位设置，所述第一中心线的延伸方向与所述第一孔洞组的长度方向一致。
  5. 根据权利要求3所述的柔性显示面板，其中，在所述角部弯折区域还设置有多组第二孔洞组，所述第二孔洞组设置为长条状，所述第二孔洞组的第二中心线与所述径向一致，所述第二中心线的延伸方向与所述第二孔洞组的宽度方向一致，所述角部弯折区域弯折后位于所述角部弯折区域的中部的所述第二孔洞组的宽度增大，位于所述角部弯折区域的边缘区的所述第二孔洞组的宽度增大。
  6. 根据权利要求5所述的柔性显示面板，其中，多组所述第二孔洞组排列形成多排，各排所述第二孔洞组的排列方向与所述角部弯折区域的远离所述平面区域一侧的边沿的延伸方向一致。
  7. 根据权利要求5所述的柔性显示面板，其中，在径向上相邻的两个所述第二孔洞组的所述第二中心线位于同一径向上或错位设置。
  8. 根据权利要求5所述的柔性显示面板，其中，所述角部弯折区域的中部和 边缘区的所述第一孔洞组的宽度大于其余部分的所述第一孔洞组的宽度；和/或
    所述角部弯折区域的中部和边缘区的所述第二孔洞组的宽度大于其余部分的所述第二孔洞组的宽度。
  9. 根据权利要求5所述的柔性显示面板，其中，所述角部弯折区域的中部和边缘区的所述第一孔洞组的密度大于其余部分的所述第一孔洞组的密度；和/或
    所述角部弯折区域的中部和边缘区的所述第二孔洞组的密度大于其余部分的所述第二孔洞组的密度。
  10. 根据权利要求5所述的柔性显示面板，其中，切向相邻的两个所述第一孔洞组与径向相邻的两个所述第二孔洞组围绕形成梯形。
  11. 根据权利要求5所述的柔性显示面板，其中，所述第一孔洞组包括一个第一孔洞，所述第一孔洞的截面形状为矩形、椭圆形或梯形；所述第二孔洞组包括一个第二孔洞，所述第二孔洞的截面形状为矩形、椭圆形或梯形。
  12. 根据权利要求5所述的柔性显示面板，其中，所述第一孔洞组包括多个第一孔洞，多个所述第一孔洞沿所述第一孔洞组的长度方向排列，所述第一孔洞的截面形状为圆形、矩形或椭圆形；所述第二孔洞组包括多个第二孔洞，多个所述第二孔洞沿所述第二孔洞组的长度方向排列，所述第二孔洞的截面形状为圆形、矩形或椭圆形。
  13. 根据权利要求5所述的柔性显示面板，其中，所述第一孔洞组包括多个第一孔洞，多个所述第一孔洞沿所述第一孔洞组的宽度方向排列，所述第一孔洞的截面形状为矩形或椭圆形；所述第二孔洞组包括多个第二孔洞，多个所述第二孔洞沿所述第二孔洞组的宽度方向排列，所述第二孔洞的截面形状为矩形或椭圆形。
  14. 根据权利要求5所述的柔性显示面板，其中，所述第二孔洞组的宽度大于等于5μm且小于等于20μm、长度大于等于100μm且小于等于1000μm、深度大于等于20μm且小于等于60μm，径向相邻的两个所述第二孔洞组之间的间距大于等于150μm且小于等于1200μm，切向相邻的两个所述第二孔洞组之间的间距大于等于150μm且小于等于1200μm。
  15. 根据权利要求5所述的柔性显示面板，其中，所述第一孔洞组位于防裂缝坝的远离显示区域的一侧，所述第二孔洞组位于防裂缝坝的远离显示区域的一侧。
  16. 根据权利要求3所述的柔性显示面板，其中，所述第一孔洞组的宽度大于等于5μm且小于等于20μm、长度大于等于100μm且小于等于1000μm、深 度大于等于20μm且小于等于60μm，径向相邻的两个所述第一孔洞组之间的间距大于等于150μm且小于等于1200μm，切向相邻的两个所述第一孔洞组之间的间距大于等于150μm且小于等于1200μm。
  17. 根据权利要求1所述的柔性显示面板，其中，靠近所述柔性显示面板的边沿的第一孔洞组连通至所述柔性显示面板的边沿，以使所述柔性显示面板的边沿形成多个缺口。
  18. 一种显示装置，其中，包括：权利要求1～17任意一项所述的柔性显示面板。
  19. 一种柔性显示面板的制备方法，其中，用于制备权利要求1～16任意一项所述的柔性显示面板，所述制备方法包括：
    在形成所述柔性显示面板的工艺之中，通过两次刻蚀工艺在所述角部弯折区域形成多组第一孔洞组，所述角部弯折区域弯折后位于所述角部弯折区域的中部的所述第一孔洞组的宽度增大，位于所述角部弯折区域的边缘区的所述第一孔洞组的宽度减小。
  20. 一种显示模组，其中，包括：
    盖板；
    权利要求1～17任意一项所述的柔性显示面板；
    承载膜，用于在所述柔性显示面板与所述盖板贴合时承载所述柔性显示面板，所述承载膜包括：
    平面承载区域，用于承载所述柔性显示面板的平面区域；
    第一弯折承载区域，沿第一方向连接于平面承载区域的第一边沿，用于承载所述柔性显示面板的第一弯折区域；
    第二弯折承载区域，沿第二方向连接于平面承载区域的第二边沿，用于承载所述柔性显示面板的第二弯折区域，第二方向与第一方向呈设定角度；
    角部弯折承载区域，连接于平面承载区域的拐角处，且与第一弯折承载区域和第二弯折承载区域之间均设置有间隔空间，用于承载所述柔性显示面板的角部弯折区域。
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CN114882794B (zh) * 2022-05-23 2023-09-26 武汉华星光电半导体显示技术有限公司 显示模组

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