WO2022217655A1 - 支撑板及折叠显示屏 - Google Patents

支撑板及折叠显示屏 Download PDF

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Publication number
WO2022217655A1
WO2022217655A1 PCT/CN2021/090493 CN2021090493W WO2022217655A1 WO 2022217655 A1 WO2022217655 A1 WO 2022217655A1 CN 2021090493 W CN2021090493 W CN 2021090493W WO 2022217655 A1 WO2022217655 A1 WO 2022217655A1
Authority
WO
WIPO (PCT)
Prior art keywords
support plate
sub
bending
sliding
openings
Prior art date
Application number
PCT/CN2021/090493
Other languages
English (en)
French (fr)
Inventor
黄雨田
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 JP2021548166A priority Critical patent/JP7399178B2/ja
Priority to EP21899303.8A priority patent/EP4325468A1/en
Priority to US17/297,656 priority patent/US20240015902A1/en
Priority to KR1020217022209A priority patent/KR102637347B1/ko
Publication of WO2022217655A1 publication Critical patent/WO2022217655A1/zh

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Classifications

    • 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
    • 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
    • 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
    • G06F1/1641—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being formed by a plurality of foldable display components
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
    • H04M1/0268—Details of the structure or mounting of specific components for a display module assembly including a flexible display panel
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
    • H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
    • H04M1/0214—Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • 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

  • the invention relates to the field of display technology, in particular to a support plate and a folding display screen.
  • the existing stack structure of the foldable display screen generally includes a support plate for supporting the flexible display panel.
  • a support plate for supporting the flexible display panel.
  • the part of the support plate located in the bending area is removed.
  • such a design may result in a lack of effective support for a part of the bending area of the foldable display screen, and the waviness and crease caused by repeated folding or unfolding of the bending area are serious.
  • Embodiments of the present invention provide a support plate and a folding display screen to solve the problem that the existing folding display screen lacks effective support in the bending area, resulting in serious ripples and creases after repeated folding or unfolding of the bending area. technical problem.
  • An embodiment of the present invention provides a support plate for supporting a flexible display panel, the support plate includes at least one bending area, at least one sliding area and a non-bending area, the bending area is used for bending, so The sliding and rolling regions are used for sliding and rolling, and the non-bending regions are disposed on two opposite sides of each of the bending regions, and between the bending regions and the sliding rolling regions; wherein any of the Both the bending area and any of the sliding-rolling areas include a plurality of first openings arranged in an array.
  • any one of the first openings includes two first sub-openings extending along a first direction and arranged perpendicular to the first direction, and two first sub-holes located in the two A second sub-aperture extending between the first sub-apertures and along a second direction, the second direction being different from the first direction.
  • a plurality of the first openings in any two adjacent columns or two adjacent rows are arranged in a staggered arrangement.
  • the first direction and the second direction are perpendicular, and the two first sub-holes of any one of the first openings are arranged flush.
  • the maximum length of the first opening along the first direction is L
  • the second sub-holes of the first openings in two adjacent rows are along the second direction
  • the distance between the center lines of , is S, L/2 ⁇ S ⁇ L.
  • the maximum length of the first opening along the second direction is W
  • the maximum width of the first sub-hole along the second direction is W1.
  • the distance between the centerlines of the second sub-holes of the two rows of the first holes along the first direction is D, where W1 ⁇ D ⁇ (W-2W1).
  • the support plate further includes a plurality of second openings, the second openings extend along the second direction, and the second openings are along the second direction Alternately arranged with the first openings.
  • the centerline of any of the second openings along the second direction and the second sub-holes of the first openings in the same column along the second direction Centerlines coincide.
  • the first sub-openings in any two adjacent rows are staggered and distributed, the first sub-openings in odd-numbered rows are aligned and distributed, and the first sub-openings in even-numbered rows are aligned and distributed.
  • any two columns of the second sub-openings in any continuous arrangement of the four columns of the second sub-openings are staggered and distributed.
  • the second sub-aperture in the same first opening, communicates with the two first sub-apertures.
  • the length of the first sub-aperture is greater than the length of the second sub-aperture.
  • both the bending region and the sliding rolling region include a middle region and an edge region located on both sides of the middle region and adjacent to the free edge, and the edge region is provided with a plurality of A third opening extending along the free edge toward the intermediate region.
  • the third openings extend along the first direction, and a plurality of the third openings are arranged along a direction perpendicular to the first direction, and any one of the third openings is arranged along a direction perpendicular to the first direction.
  • the third opening is arranged in parallel with at least one of the first sub-openings.
  • the third opening includes a third sub-aperture and a fourth sub-aperture with different lengths, and the third sub-aperture and the fourth sub-aperture are staggered in sequence set up.
  • the shape of the third opening is a "U" shape.
  • the bending region is bent along a bending axis, and the sliding direction of the sliding rolling region is perpendicular to the bending axis.
  • the extending direction of the first sub-aperture is the same as the direction in which the bending axis is located, and the extending direction of the second sub-aperture is the same as the sliding direction of the sliding rolling area. same direction.
  • the support plate includes a first non-bending area, a bending area, a second non-bending area and a sliding area that are arranged in sequence, and the bending area of the bending area is The direction is opposite to the direction of curling of the slip-rolled region.
  • An embodiment of the present invention further provides a foldable display screen, comprising the support plate described in any of the above embodiments and a flexible display panel disposed on one side of the support plate, the flexible display panel including a curved display panel connected to the support plate.
  • the folding display screen further includes a backplane, a polarizer, and a touch layer
  • the backplane is disposed between the flexible display panel and the support plate
  • the backplane The polarizer is arranged on the side of the flexible display panel away from the support plate
  • the touch layer is arranged on the side of the polarizer away from the flexible display panel.
  • the supporting plate is designed to have a structure with a bending area and a sliding rolling area, and the first openings of the array are designed in both the bending area and the sliding rolling area, so that the flexible display panel can be supported and improved.
  • the flatness of the flexible display panel can also enable the support plate in the bending area to have good extension performance and recovery deformation ability, and can improve the corrugation and crease phenomenon generated by the bending part of the flexible display panel in the prior art.
  • FIG. 1 is a schematic plan view of a support plate provided by an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a bending region of a support plate according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a bending region of a support plate according to another embodiment of the present invention.
  • FIG. 4 is an enlarged schematic view of the first opening in FIG. 2 .
  • FIG. 5 is an enlarged schematic view of the first opening in FIG. 3 .
  • FIG. 6 is a schematic structural diagram of a bending region of a support plate according to another embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a bending region of a support plate according to still another embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a bending region of a support plate according to another embodiment of the present invention.
  • FIG. 9 is a film stacking composition diagram of a folding display screen provided by an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a flattened state of a folding display screen provided by an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a sliding roll portion of a folding display screen provided by an embodiment of the present invention after sliding outwards.
  • FIG. 12 is a schematic structural diagram of an inward folding of a bending portion of a folding display screen according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a bending portion of a folding screen provided by an embodiment of the present invention after being folded inward.
  • the present invention is aimed at the existing folding display screen, because the part of the support plate located in the bending area is removed, resulting in the lack of effective support in the bending area of the folding display screen, and the bending area is caused by repeated folding or unfolding. In view of the serious technical problem of marks, this embodiment is proposed to overcome this defect.
  • an embodiment of the present invention provides a support plate 10 for supporting a flexible display panel, and the support plate 10 includes at least one bending area 101 and at least one sliding area 103 , and a non-bending area 102, the bending area 101 is used for bending, the sliding rolling area 103 is close to the edge of the support plate, the sliding rolling area 103 is used for sliding and curling, the non-bending area
  • the regions 102 are located on two opposite sides of each of the bending regions 101 and between the bending regions 101 and the sliding rolling regions 103 , wherein the bending regions 101 and the sliding rolling regions both include arrays of A plurality of first openings 11 .
  • the folding display product in the prior art is a double-folding design of outer folding + inner folding, and the parts of the outer folding area and the inner folding area of the supporting plate are hollowed out to become three independent supporting plates
  • the display product has good display effect and bending life, but due to the lack of support in the outer and inner fold areas, under the long-term repeated folding of the screen, the ripples and creases in the inner and outer fold areas are more serious.
  • the support plate of the embodiment of the present invention adopts a new type of bending + sliding and curling design, and retains the support plate in the bending area and the sliding rolling area.
  • the digging design of the roll area can improve the corrugation phenomenon in the bending area, and at the same time, it can also realize the new folding display design of sliding and rolling type.
  • any one of the first openings 11 includes two first sub-openings 111 extending along the first direction X and arranged perpendicular to the first direction X, and two first sub-holes 111 located in the two first sub-holes 111 .
  • the second sub-holes 112 between the openings 111 and extending along the second direction Y, the second direction X is different from the first direction Y.
  • the first opening 11 of the support plate 10 in the embodiment of the present invention includes a first sub-aperture and a second sub-aperture extending in different directions, which can simultaneously release different stresses in the bending area and the sliding area.
  • the material of the support plate 10 includes but is not limited to stainless steel (SUS).
  • the support plate 10 of the embodiment of the present invention can support and protect the bending area of the flexible display panel.
  • the design with the first sub-hole 111 and the second sub-hole 112 on the bending area 101 and the sliding area 103 of the support plate 10 On the one hand, the proportion of the opening area in the bending area 101 and the sliding area 103 is increased, which is beneficial to reduce the Young's modulus of the bending area 101 and the sliding area 103 of the support plate 10 and improve the elasticity of the support plate 10
  • the amount of deformation, while reducing the appearance of ripples and creases in the bending area 101, is also conducive to realizing the design of the sliding folding screen, and the bending life of the support plate 10 under the condition of extremely small bending radius has a relatively obvious Boost effect.
  • a plurality of the first openings 11 in any two adjacent columns or two adjacent rows are arranged in a staggered arrangement. Since the first openings 11 arranged in dislocation are affected by the material strength of the adjacent non-opening parts, after the bending force disappears, the stretched and extended part of the first openings 11 can quickly return to its original state, so that the support plate 10 has a good ability to restore deformation, improve the phenomenon of ripples and creases caused by repeated folding and unfolding of the flexible display panel, and ensure the flatness of the flexible display panel after restoring the flat state.
  • the staggered arrangement of the first openings 11 can make the stress distribution of the support plate 10 more uniform during bending, and avoid stress concentration in a certain place.
  • the bending region 101 is bent along a bending axis L1, and the sliding direction of the sliding rolling region 103 is perpendicular to the bending axis L1. Further, the rolling axis of the sliding rolling area 103 is parallel to the bending axis L1.
  • the extension direction of the first sub-hole 111 is the same as the direction of the bending axis L1, which is conducive to the release of bending stress when the bending area 101 is bent and the sliding area 103 is curled; the The extending direction of the second sub-holes 112 is the same as the sliding direction of the sliding rolling area 103 , which is beneficial to release the tensile stress received by the sliding rolling area 103 during sliding.
  • the first sub-openings 111 in any two adjacent rows are staggered and distributed, the first sub-openings 111 in odd-numbered rows are aligned and distributed, and the first sub-openings 111 in even-numbered rows are aligned and distributed.
  • any two rows of the first apertures 11 in any continuous arrangement of the four rows of the first apertures 11 are staggered and distributed, so that the stress distribution is more uniform.
  • any two rows of the second sub-holes 112 in any of the four consecutive rows of the second sub-holes 112 are dislocated and distributed.
  • the first direction X and the second direction Y are perpendicular, and the two first sub-holes 111 of any one of the first openings 11 are arranged flush.
  • the connection line between the outer end points of the two first sub-holes 111 on the same side is the same as the first direction X.
  • center line of the second sub-hole 112 of any first hole 11 along the second direction coincides with the center line of the first sub-hole 111 of the first hole 11 along the second direction Y.
  • the maximum length of the first opening 11 along the first direction X is L
  • the second sub-openings of the first openings 11 in two adjacent rows are L.
  • the distance between the centerlines L3 and L4 of the holes 112 along the second direction is S, L/2 ⁇ S ⁇ L, so that two adjacent rows of the first openings 11 have intersections in the first direction X.
  • the arrangement density of the first sub-holes 111 on the support plate 10 can be increased, and the area of the first holes 11 can be increased by the design of overlapping the first openings 11 in the two rows in the first direction X. ratio, thereby increasing the amount of elastic deformation of the support plate 10 .
  • the maximum length of the first opening 11 along the second direction Y is W
  • the first sub-opening 111 along the second The maximum width in the direction Y is W1
  • the distance between the centerlines L5 and L6 of the second sub-holes 112 of the first openings 11 in two adjacent rows along the first direction X is D, where W1 ⁇ D ⁇ (W-2W1). Therefore, two adjacent rows of the first openings 11 overlap in the second direction Y, that is, there is at least one straight line L7 with the same extension direction as the second direction Y passing through the adjacent two rows of the first openings 11 .
  • the arrangement density of the second sub-holes 112 on the support plate 10 can be increased by the overlapping design of the two adjacent rows of the first openings 11 in the second direction Y, compared with the one shown in FIG. 2 .
  • the embodiment can further increase the area ratio of the first opening 11 , further increase the amount of elastic deformation of the support plate 10 , and ensure the reliability of the bending performance of the support plate 10 .
  • the distance D between the center lines L5 and L6 is (W-W1)/2, so that the stress distribution of the support plate 10 is more uniform during bending.
  • the distance between two adjacent first sub-holes 111 in the same row is smaller than the maximum length of the first sub-holes 111 along the first direction X.
  • the distance between two adjacent first sub-holes 111 in the same row is smaller than the maximum width of the first sub-holes 111 along the second direction Y.
  • the value range of the maximum length W of the first opening 11 along the second direction Y may be 0.8-0.9 mm.
  • the maximum length L of the first opening 11 along the first direction X may be 4.00 ⁇ 4.20 mm. In this embodiment, the maximum length L is the maximum length of the first sub-hole 111 in the first direction X. As shown in FIG.
  • the maximum width W1 of the first sub-hole 111 along the second direction Y may be 0.18 mm ⁇ 0.22 mm.
  • the width of the second sub-hole 112 along the first direction X may be 0.16-0.22 mm.
  • the distance between two adjacent first sub-holes 111 in the same row may be 0.45-0.55 mm.
  • the distance between two adjacent first sub-holes 111 in the same row may be 0.10-0.15 mm.
  • the distance along the first direction X between the first sub-holes 111 of any row of the first apertures 11 and the second sub-holes 112 of the first apertures 11 of the adjacent row may be 0.14-0.18 mm.
  • the shapes of the first sub-opening 111 and the second sub-opening 112 include a long strip, an ellipse, a plum blossom, a parallelogram, and the like.
  • the shapes of the first sub-holes 111 and the second sub-holes 112 are both elongated.
  • the corners of the first sub-hole 111 and the corners of the second sub-hole 112 can be designed to be inverted Rounded corner design to avoid stress concentration.
  • the four corners of the first sub-hole 111 are all rounded corners, and the radius of the arc of the rounded corners along the first direction X may be 0.16-0.22 mm.
  • both ends of the first sub-hole 111 are semi-circular, and the radius of the semi-circle may be 0.16-0.22 mm.
  • the length of the first sub-hole 111 is greater than the length of the second sub-hole 112, which is beneficial to improve the extension performance of the support plate 10 when it is bent along the bending axis L1.
  • the bending area 101 and the sliding area 103 both include a middle area and an edge area located on both sides of the middle area and adjacent to the free edge 1013.
  • the edge region is provided with a plurality of third openings 12 extending along the free edge 1013 to the middle region.
  • the bending region 101 includes a middle region 1011 and edge regions 1012 on both sides of the middle region 1011
  • the rolling region 103 includes a middle region 1031 and edge regions 1032 on both sides of the middle region 1031 .
  • the free edge 1013 is the edge of the support plate 10 that is perpendicular to the bending axis L1.
  • the extension performance of the support plate 10 can be further improved, and the bending area 101 and the sliding area can be reduced.
  • the two ends of the area 103 generate a compressive stress on the display panel during the bending or sliding process.
  • the third openings 12 extend along the first direction X, and a plurality of the third openings 12 are arranged along a direction perpendicular to the first direction X, and any one of the third openings 12 is arranged along a direction perpendicular to the first direction X.
  • the hole 12 is arranged in parallel with at least one of the first sub-holes 111 .
  • the lengths of the third openings 12 in the same row in the first direction X are kept the same, so that when the support plate is bent, the stress distribution in the regions near the free edge 1013 on both sides is more uniform.
  • the shape of the third opening 12 may be a "U" shape.
  • the third opening 12 includes a third sub-aperture 121 and a fourth sub-aperture 122 with different lengths.
  • the length of the third sub-hole 121 is greater than the length of the fourth sub-hole 122 .
  • the length of the fourth sub-hole 122 along the first direction X may be 1.45 ⁇ 1.55 mm.
  • the third sub-holes 121 and the fourth sub-holes 122 are alternately distributed in sequence.
  • any of the third openings 12 can be formed by intersecting the first sub-opening 111 and the free edge 1013 .
  • the second sub-aperture 112 communicates with the two first sub-apertures 111 , that is, the first opening 11 is formed into an "I" or "H" shape.
  • the support plate 10 further includes a plurality of second openings 13 , the second openings 13 extend along the second direction Y, and the second openings 13 extend along the second direction Y.
  • the second direction Y and the first openings 11 are alternately arranged.
  • the area ratio of the openings of the support plate 10 can be increased, and the amount of elastic deformation of the support plate 10 can be increased.
  • the centerline of any second opening 13 along the second direction Y is along the second sub-hole 112 of the first opening 11 in the same column along the second The centerlines of the direction Y coincide.
  • the second opening 13 extends along the second direction Y, and there is a gap between the second opening 13 and the two adjacent first openings 11 to increase the longitudinal direction of the support plate 10 stability.
  • the second openings 13 are also provided between two adjacent third sub-openings 121 arranged along the second direction Y to further increase the support.
  • the area ratio of the openings of the plate 10 There is a gap between the second opening 13 and the adjacent two third sub openings 121 to increase the longitudinal stability of the support plate 10 .
  • Any second opening 13 in the middle regions 1011 and 1031 is located in the gap between two adjacent first sub openings 111 in the same row, and any second opening 13 in the edge region 1012 The openings 13 are all located between the fourth sub-aperture 122 in the same row and the first sub-aperture 111 adjacent thereto.
  • the support plate 10 includes a first non-bending area 102A, a bending area 101, In the second non-bending region 102B and the sliding-rolling region 103 , the bending direction of the bending region 101 is opposite to the curling direction of the sliding-rolling region 103 .
  • the bending region 101 can be folded inward into a wedge shape, which can satisfy the design of the bending radius ⁇ 1.5mm.
  • the sliding roll area 103 can be slidably folded outward into a "U" shape, which can meet the design of a bending radius of 2.5-3 mm.
  • an embodiment of the present invention further provides a foldable display screen 100.
  • the foldable display screen 100 includes the support plate 10 in any of the above-mentioned embodiments and a foldable display screen 100 disposed on the support plate. 10 side of the flexible display panel 30.
  • the flexible display panel 30 includes a bending portion 301 corresponding to the bending region 101 of the supporting plate 10 , a sliding portion 303 corresponding to the sliding region 103 of the supporting plate 10 , and a sliding portion 303 corresponding to the supporting plate 10
  • the non-bending region 102 corresponds to the plane portion 302 .
  • the folding display screen 100 further includes a backplane 20 , a polarizer 40 and a touch layer 50 , the backplane 20 is disposed between the flexible display panel 30 and the support plate 10 , the polarizer 40 is disposed on the side of the flexible display panel 30 away from the support plate 10 , and the touch layer 50 is disposed on the side of the polarizer 40 away from the flexible display panel 30 .
  • a cover plate is further provided on the side of the touch layer 50 away from the flexible display panel 30 , and the cover plate and the touch layer 50 are attached through a first adhesive layer.
  • the back plate 20 and the support plate 10 are attached through a second adhesive layer.
  • first adhesive layer and the second adhesive layer include but are not limited to pressure sensitive adhesive (PSA).
  • PSA pressure sensitive adhesive
  • thermoplastic polyurethane resin film is further disposed between the back plate 20 and the support plate 10 , and the thermoplastic polyurethane resin has the characteristics of high tension, high tensile force, toughness and aging resistance.
  • thermoplastic polyurethane resin film and the back plate 20 and between the thermoplastic polyurethane resin film and the support plate 10 can be attached through an adhesive layer.
  • the position of the neutral layer of the folding display screen 100 can be adjusted by adjusting the thickness of each adhesive layer, so that the film layer where the flexible display panel 30 is located is closer to the position of the neutral layer, thereby enhancing the folding display screen. 100 bending performance.
  • the supporting plate 10 including one bending area and one sliding area 103 as an example, but it is not limited to this.
  • the supporting plate may include more bending areas. area and two sliding areas.
  • the support plate 10 includes a first non-bending area 102A, a first non-bending area 102A, a bending area 101 , a second non-bending area 102B, and a sliding area 103 arranged in sequence.
  • the flexible display panel 30 includes a first flat portion 302A, a bending portion 301 , a second flat portion 302B, and a sliding portion 303 distributed in sequence.
  • a in FIG. 10 is a schematic front view of the folding display screen 100
  • B in FIG. 10 is a schematic diagram of the reverse side of the folding display screen 100 .
  • the folding display screen 100 includes opposite front and back sides.
  • the display surfaces of all parts of the flexible display panel 30 are located on the front side, and the display area of the foldable display screen 100 is the largest, which can be applied to computer scenarios.
  • C in FIG. 11 is a schematic diagram of the front view after the sliding portion 303 of the folding display screen 100 is slid and rolled to the back
  • D in FIG. 11 is the sliding portion 303 of the folding display 100 being slid and rolled Schematic diagram of the back after reaching the back.
  • the sliding rolling portion 303 is rolled while sliding. side
  • the display surface of the folding display screen 100 corresponding to the sliding part 303 is located at the back
  • the display area of the folding display screen 100 is reduced
  • the first flat part 302A and the second flat part 302B together form a display face, which can be applied to pad scenes.
  • the display surface of the folding display screen 100 in the embodiment of the present invention is mainly composed of three parts, namely, the sliding portion 303, The second plane portion 302B and the first plane portion 302A are formed.
  • the folding display screen 100 of the embodiment of the present invention may include two different forms of folding. In order to make the above three parts overlap without occupying too much space after the two folding, preferably, the sliding part 303 and the second plane part The length and width of the first plane portion 302B and the first plane portion 302A may be approximately equal.
  • E in FIG. 12 is a schematic front view of the bending portion 301 of the folding display screen 100 when folded inward
  • F in FIG. 12 is the bending portion 301 of the folding display screen 100
  • G and H in FIG. 13 are schematic diagrams of the back after the bending portion 301 of the folding display screen 100 is completely bent.
  • the bending portion 301 drives the first flat portion 302A to bend to the front of the second flat portion 302B (the side away from the second non-bending area 102B), and the folding display screen 100
  • the part corresponding to the first flat portion 302A is folded inward to the front of the folding display screen 100 to further reduce the display area of the folding display screen 100.
  • the display surface corresponding to the first flat portion 302A and the display surface corresponding to the second flat portion 302B are The display surface is opposite and cannot be displayed, so only the part corresponding to the sliding scroll part 303 on the back is the display surface, which can be applied to the mobile phone scene.
  • the support plate 10 is designed to have a structure with a bending area and a sliding area at the same time, and an array of first openings 11 are designed in the bending area and the sliding area, so as to support the flexible display panel. It can improve the flatness of the flexible display panel, and make the support plate in the bending area have good extension performance and recovery deformation ability, which can improve the corrugation and crease phenomenon caused by the bending part of the flexible display panel in the prior art.
  • the first opening 11 includes a first sub-aperture 111 and a second sub-aperture 112 extending in different directions, which can simultaneously release the bending stress of the bending region 101 and the bending stress of the sliding rolling region 103 As well as the release of tensile stress, the support plate 10 has good elongation performance and recovery deformation ability in both regions.

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Abstract

支撑板(10)及折叠显示屏，支撑板(10)包括至少一弯折区域(101)、至少一滑卷区域(103)及非弯折区域(102)，滑卷区域(103)靠近支撑板边缘，滑卷区域(103)用于滑动和卷曲，非弯折区域(102)位于每一弯折区域(101)的两相对侧、以及位于弯折区域(101)和滑卷区域(103)之间；弯折区域(101)和滑卷区域(103)均包括阵列设置的多个第一开孔(11)，能够改善柔性显示面板的弯折部产生的波纹和折痕现象。折叠显示屏(100)包括支撑板(10) 和设置于支撑板(10)一侧的柔性显示面板(30)。

Description

支撑板及折叠显示屏 技术领域
本发明涉及显示技术领域，尤其涉及一种支撑板及折叠显示屏。
 背景技术
现有的折叠显示屏的堆叠结构一般包括用于支撑柔性显示面板的支撑板，为了使得折叠显示屏具有较好的显示效果和弯折寿命，将支撑板的位于弯折区的部分去除。但该种设计会导致折叠显示屏的弯折区的部分缺乏有效支撑，弯折区因重复折叠或展开所产生的波纹(waviness)和折痕较为严重。
因此，现有的折叠显示屏的结构亟需改进。
 技术问题
本发明实施例提供一种支撑板及折叠显示屏，以解决现有的折叠显示屏在弯折区缺乏有效支撑，导致弯折区在重复折叠或展开后，产生的波纹和折痕较为严重的技术问题。
 技术解决方案
为解决上述问题，本发明提供的技术方案如下：
本发明实施例提供一种支撑板，用于支撑柔性显示面板，所述支撑板包括至少一弯折区域、至少一滑卷区域以及非弯折区域，所述弯折区域用于弯折，所述滑卷区域用于滑动和卷曲，所述非弯折区域设置于每一所述弯折区域两相对侧、以及所述弯折区域与所述滑卷区域之间；其中，任一所述弯折区域和任一所述滑卷区域均包括阵列设置的多个第一开孔。
在本发明的至少一种实施例中，任一所述第一开孔包括两个沿第一方向延伸、并沿垂直于所述第一方向排布的第一子开孔，以及位于两所述第一子开孔之间并沿第二方向延伸的第二子开孔，所述第二方向与所述第一方向不同。
在本发明的至少一种实施例中，任意相邻两列或者相邻两行的多个所述第一开孔错位排列。
在本发明的至少一种实施例中，所述第一方向和所述第二方向垂直，任一所述第一开孔的两所述第一子开孔平齐设置。
在本发明至少一种实施例中，所述第一开孔沿所述第一方向的最大长度为L，相邻两列所述第一开孔的第二子开孔沿所述第二方向的中心线之间的间距为S，L/2＜S＜L。
在本发明的至少一种实施例中，所述第一开孔沿所述第二方向的最大长度为W，所述第一子开孔沿所述第二方向的最大宽度为W1，相邻两行所述第一开孔的第二子开孔沿所述第一方向的中心线之间的间距为D，其中，W1＜D＜（W-2W1）。
在本发明的至少一种实施例中，所述支撑板还包括多个第二开孔，所述第二开孔沿所述第二方向延伸，所述第二开孔沿所述第二方向与所述第一开孔交替排布。
在本发明的至少一种实施例中，任一所述第二开孔沿所述第二方向的中心线与其同列的所述第一开孔的第二子开孔沿所述第二方向的中心线重合。
在本发明的至少一种实施例中，任意相邻两行的第一子开孔错位分布，奇数行的第一子开孔对齐分布，偶数行的第一子开孔对齐分布。
在本发明的至少一种实施例中，任意连续排列的四列第二子开孔中的任意两列第二子开孔错位分布。
在本发明的至少一种实施例中，同一所述第一开孔中，所述第二子开孔连通两所述第一子开孔。
在本发明的至少一种实施例中，同一所述第一开孔中，所述第二子开孔与两所述第一子开孔之间均具有间隙。
在本发明的至少一种实施例中，所述第一子开孔的长度大于所述第二子开孔的长度。
在本发明的至少一种实施例中，所述弯折区域和所述滑卷区域均包括中间区域及位于所述中间区域两侧且临近自由边的边缘区域，所述边缘区域设置有多个沿所述自由边向所述中间区域延伸的第三开孔。
在本发明的至少一种实施例中，所述第三开孔沿所述第一方向延伸，且多个所述第三开孔沿与所述第一方向垂直的方向排布，任一所述第三开孔与至少一个所述第一子开孔同行设置。
在本发明的至少一种实施例中，所述第三开孔包括长度不同的第三子开孔和第四子开孔，所述第三子开孔和所述第四子开孔依次交错设置。
在本发明的至少一种实施例中，所述第三开孔的形状为“U”型。
在本发明的至少一种实施例中，所述弯折区域沿一弯折轴线弯折，所述滑卷区域的滑动方向与所述弯折轴线相互垂直。
在本发明的至少一种实施例中，所述第一子开孔的延伸方向与所述弯折轴线所在的方向相同，所述第二子开孔的延伸方向与所述滑卷区域的滑动方向相同。
在本发明的至少一种实施例中，所述支撑板包括依次排布的第一非弯折区域、弯折区域、第二非弯折区域以及滑卷区域，所述弯折区域的弯折方向与所述滑卷区域的卷曲方向相反。
本发明实施例还提供一种折叠显示屏，包括上述任一实施例所述的支撑板以及设置于所述支撑板一侧的柔性显示面板，所述柔性显示面板包括与所述支撑板的弯折区域对应的弯折部、与所述支撑板的滑卷区域对应的滑卷部、以及与所述支撑板的非弯折区域对应的平面部。
在本发明的至少一种实施例中，所述折叠显示屏还包括背板、偏光片、以及触控层，所述背板设置于所述柔性显示面板与所述支撑板之间，所述偏光片设置于所述柔性显示面板背离所述支撑板的一侧，所述触控层设置于所述偏光片背离所述柔性显示面板的一侧。
 有益效果
本发明通过将支撑板设计为具有弯折区和滑卷区的结构，并在弯折区和滑卷区均设计有阵列的第一开孔，既能起到支撑柔性显示面板的作用，提高柔性显示面板的平整度，又能使得弯折区的支撑板具有良好的延伸性能和恢复形变能力，能够改善现有技术中柔性显示面板的弯折部产生的波纹和折痕现象。
 附图说明
图1为本发明实施例提供的支撑板的平面示意图.
图2为本发明实施例提供的支撑板的弯折区域的结构示意图。
图3为本发明另一实施例提供的支撑板的弯折区域的结构示意图。
图4为图2中的第一开孔的放大示意图。
图5为图3中的第一开孔的放大示意图。
图6为本发明又一实施例提供的支撑板的弯折区域的结构示意图。
图7为本发明再一实施例提供的支撑板的弯折区域的结构示意图。
图8为本发明其他实施例提供的支撑板的弯折区域的结构示意图。
图9为本发明实施例提供的折叠显示屏的膜层叠构图。
图10为本发明实施例提供的折叠显示屏的展平状态示意图。
图11为本发明实施例提供的折叠显示屏的滑卷部滑动外折后的结构示意图。
图12为本发明实施例提供的折叠显示屏的弯折部的内折的结构示意图。
图13为本发明实施例提供的折叠屏的弯折部内折后的结构示意图。
 本发明的实施方式
本申请提供一种支撑板及折叠显示屏，为使本申请的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本申请进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
本发明针对现有的折叠显示屏，由于将支撑板位于弯折区的部分去除，导致折叠显示屏的弯折区的部分缺乏有效支撑，弯折区因重复折叠或展开后产生的波纹和折痕较为严重的技术问题，提出本实施例以克服该缺陷。
请参阅图1和图2，本发明实施例提供一种支撑板10，所述支撑板10用于支撑柔性显示面板，所述支撑板10包括至少一弯折区域101、至少一滑卷区域103、以及非弯折区域102，所述弯折区域101用于弯折，所述滑卷区域103靠近所述支撑板的边缘，所述滑卷区域103用于滑动和卷曲，所述非弯折区域102位于每一所述弯折区域101两相对侧、以及位于所述弯折区域101和所述滑卷区域103之间，其中，所述弯折区域101和滑卷区域均包括阵列设置的多个第一开孔11。
现有技术中的折叠显示产品为外折+内折的双折叠设计，支撑板的外折区和内折区的部分均被挖空，成为三块独立的支撑板，虽然此种结构的折叠显示产品具有较好的显示效果和弯折寿命，但由于外折区和内折区缺乏支撑，屏幕在长期反复折叠下，内折区和外折区内产生的波纹和折痕较为严重。相比于现有技术三段式的支撑板设计，本发明实施例的支撑板采用新型的弯折+滑动卷曲设计，且保留弯折区和滑卷区的支撑板，对弯折区和滑卷区进行挖孔设计，能够改善弯折区的波纹现象，同时也能够实现滑动卷曲式的新型折叠显示设计。
具体地，任一所述第一开孔11包括两个沿第一方向延伸X、并沿垂直于所述第一方向X排布的第一子开孔111，以及位于两所述第一子开孔111之间并沿第二方向Y延伸的第二子开孔112，所述第二方向X与所述第一方向Y不同。本发明实施例的支撑板10的第一开孔11包括沿不同方向延伸的第一子开孔和第二子开孔，能够同时兼顾弯折区域和滑卷区域的不同应力的释放。
所述支撑板10的材料包括但不限于不锈钢（SUS）材料。
本发明实施例的支撑板10可对柔性显示面板的弯折区域进行支撑和保护。相比于现有技术中的仅具有第一子开孔的设计，支撑板10的弯折区域101和滑卷区域103上的具有第一子开孔111和第二子开孔112的设计，一方面增大了弯折区域101和滑卷区域103内开孔面积的占比，有利于降低支撑板10的弯折区域101和滑卷区域103的杨氏模量，提高支撑板10的弹性形变量，在减少弯折区域101的波纹和折痕的出现的同时，也有利于实现滑动式折叠屏的设计，在极小弯折半径条件下的支撑板10的弯折寿命具有较明显的提升效果。
参阅图2和图3，一种实施例中，任意相邻两列或者相邻两行的多个所述第一开孔11错位排列。由于错位排列的第一开孔11受其相邻未开孔部分的材料强度的影响，在弯折作用力消失后，第一开孔11中间拉伸延展的部分可迅速恢复原状，使得支撑板10具有良好的恢复形变能力，改善柔性显示面板因重复折叠和展开所产生的波纹和折痕现象，保证柔性显示面板恢复展平状态后的平整性。错位排列的第一开孔11可使得支撑板10在弯折时受到的应力分布的更加均匀，避免应力在某一处集中。
所述弯折区域101沿一弯折轴线L1弯折，所述滑卷区域103的滑动方向与所述弯折轴线L1相互垂直。更进一步地，所述滑卷区域103的卷曲轴与该弯折轴线L1平行。
所述第一子开孔111的延伸方向与所述弯折轴线L1所在的方向相同，在弯折区域101发生弯折和滑卷区域103发生卷曲时，有利于弯折应力的释放；所述第二子开孔112的延伸方向与所述滑卷区域103的滑动方向相同，有利于所述滑卷区域103在滑动时受到的拉伸应力的释放。
在本发明的一些实施例中，任意相邻两行的第一子开孔111错位分布，奇数行的第一子开孔111对齐分布，偶数行的第一子开孔111对齐分布。
更进一步地，一种实施例中，请参阅图3，任意连续排列的四列第一开孔11中的任意两列第一开孔11均错位分布，使得应力分散更均匀。
具体地，任意连续排列的四列第二子开孔112中的任意两列第二子开孔112均错位分布。
在本实施例中，所述第一方向X和所述第二方向Y垂直，任一所述第一开孔11的两所述第一子开孔111平齐设置。如图2所示，即任一所述第一开孔11中，两第一子开孔111的同侧的外端点的连线与所述第一方向X相同。
更进一步地，任一第一开孔11的第二子开孔112沿第二方向的中心线与所述第一开孔11的第一子开孔111沿第二方向Y的中心线重合。
请参阅图2和图4，一种实施例中，所述第一开孔11沿所述第一方向X的最大长度为L，相邻两列所述第一开孔11的第二子开孔112沿所述第二方向的中心线L3、L4之间的间距为S，L/2＜S＜L，使得相邻的两列第一开孔11在所述第一方向X上具有交叠，即存在至少一条延伸方向与所述第二方向Y相同的直线L2穿过相邻的两列第一开孔11。通过两列第一开孔11在所述第一方向X上具有交叠的设计，可增大支撑板10上的第一子开孔111的排布密度，增大第一开孔11的面积占比，从而增大支撑板10的弹性形变量。
进一步地，请参阅图3和图5，一种实施例中，所述第一开孔11沿所述第二方向Y的最大长度为W，所述第一子开孔111沿所述第二方向Y的最大宽度为W1，相邻两行所述第一开孔11的第二子开孔112沿所述第一方向X的中心线L5、L6之间的间距为D，其中，W1＜D＜（W-2W1）。从而使得相邻的两行第一开孔11在所述第二方向Y上具有交叠，即存在至少一条延伸方向与所述第二方向Y相同的一条直线L7穿过相邻的两行第一开孔11。通过相邻的两行第一开孔11在所述第二方向Y上具有交叠的设计，可增大支撑板10上的第二子开孔112的排布密度，相比于图2的实施例，能够进一步增大第一开孔11的面积占比，进一步增大支撑板10的弹性形变量，保证支撑板10弯折性能的可靠性。
优选地，中心线L5、L6之间的间距D取值为（W-W1）/2，使得支撑板10在弯折时应力分散更均匀。
同一行中的相邻两第一子开孔111之间的间距小于第一子开孔111沿所述第一方向X的最大长度。
同一列中的相邻两第一子开孔111之间的间距小于第一子开孔111沿所述第二方向Y的最大宽度。
所述第一开孔11沿所述第二方向Y的最大长度W的取值范围可为0.8~0.9mm。
所述第一开孔11沿所述第一方向X的最大长度L可为4.00~4.20mm。在本实施例中，所述最大长度L即所述第一子开孔111在所述第一方向X上的最大长度。
所述第一子开孔111沿所述第二方向Y的最大宽度W1可为0.18mm~0.22mm。
所述第二子开孔112沿所述第一方向X的宽度可为0.16~0.22mm。
同一行的两相邻所述第一子开孔111之间的间距可为0.45~0.55mm。
同一列的两相邻所述第一子开孔111之间的间距可为0.10~0.15mm。
任一列第一开孔11的第一子开孔111和与相邻列的第一开孔11的第二子开孔112之间的沿第一方向X的间距可为0.14~0.18mm。
一种实施例中，所述第一子开孔111和第二子开孔112的形状包括长条形、椭圆形、梅花形、平行四边形等。
请参阅图4和图5，在本实施例中，所述第一子开孔111和第二子开孔112的形状均为长条形。
具体地，由于长条形具有拐角，在弯折时拐角附近的应力较为集中，因此可将所述第一子开孔111的拐角处和所述第二子开孔112的拐角处设计为倒圆角设计，从而避免应力集中。
即所述第一子开孔111的四个角均为倒圆角，所述倒圆角的弧线沿第一方向X的半径可为0.16~0.22mm。
进一步地，在本实施例中，所述第一子开孔111的两端为半圆形，所述半圆形的半径可为0.16~0.22mm。
进一步地，所述第一子开孔111的长度大于所述第二子开孔112的长度，有利于提高支撑板10沿弯折轴线L1弯折时的延伸性能。
一种实施例中，请参阅图1和图2，所述弯折区域101和所述滑卷区域103均包括中间区域和位于所述中间区域两侧且邻近自由边1013的边缘区域，所述边缘区域设置有多个沿所述自由边1013向所述中间区域延伸的第三开孔12。例如，所述弯折区域101包括中间区域1011和位于所述中间区域1011两侧的边缘区域1012，所述滑卷区域103包括中间区域1031和位于所述中间区域1031两侧的边缘区域1032。其中，所述自由边1013为所述支撑板10的与弯折轴线L1垂直的边。
通过在弯折区域101和滑卷区域103的靠近所述自由边1013的区域设置断口的第三开孔12，既能进一步提高支撑板10的延伸性能，也能减少弯折区域101和滑卷区域103的两端在弯折或滑动过程中对显示面板产生的挤压应力。
具体地，所述第三开孔12沿所述第一方向X延伸，且多个所述第三开孔12沿与所述第一方向X垂直的方向排布，任一所述第三开孔12与至少一个所述第一子开孔111同行设置。
较优地，位于同一行的所述第三开孔12在第一方向X上的长度保持相同，从而使得支撑板在弯折时，两侧的靠近自由边1013的区域的应力分散更均匀。
一种实施例中，所述第三开孔12的形状可为“U”型。
进一步地，所述第三开孔12包括长度不同的第三子开孔121和第四子开孔122。
在本实施例中，所述第三子开孔121的长度大于所述第四子开孔122的长度。
所述第四子开孔122沿所述第一方向X的长度可为1.45~1.55mm。
更进一步地，请参阅图3，所述第三子开孔121和所述第四子开孔122依次交替分布。在对所述支撑板10进行图案化设计时，任一所述第三开孔12可由所述第一子开孔111与所述自由边1013相交而成。
一种实施例中，请参阅图2~图5，同一所述第一开孔11中，所述第二子开孔112连通两所述第一子开孔111，即所述第一开孔11形成“工”型或“H”型的形状。
在其他实施例中，请参阅图6，同一所述第一开孔11中，所述第二子开孔112与两所述第一子开孔111之间均具有间隙。
进一步地，请参阅图7和图8，所述支撑板10还包括多个第二开孔13，所述第二开孔13沿所述第二方向Y延伸，所述第二开孔13沿所述第二方向Y与所述第一开孔11交替排布。
通过设置所述第二开孔13可增加所述支撑板10的开孔的面积占比，提高支撑板10的弹性形变量。
具体地，一种实施例中，任一所述第二开孔13沿所述第二方向Y的中心线与其同列的所述第一开孔11的第二子开孔112沿所述第二方向Y的中心线重合。
所述第二开孔13沿所述第二方向Y延伸，所述第二开孔13与其相邻的两所述第一开孔11之间均具有间隙，以增加所述支撑板10在纵向的稳定性。
更进一步地，一种实施例中，沿所述第二方向Y排布的相邻两所述第三子开孔121之间也设置有所述第二开孔13，以进一步增加所述支撑板10的开孔的面积占比。所述第二开孔13与相邻两所述第三子开孔121之间均具有间隙，以增加所述支撑板10在纵向的稳定性。
所述中间区域1011、1031内的任一第二开孔13均位于同一行中相邻的两所述第一子开孔111之间的间隙内，所述边缘区域1012内的任一第二开孔13均位于同行中的第四子开孔122和与其相邻的第一子开孔111之间。
请参阅图1，在本发明的一些实施例中，以一个弯折区域和一个滑卷区域为例，所述支撑板10包括依次排布的第一非弯折区域102A、弯折区域101、第二非弯折区域102B、滑卷区域103，所述弯折区域101的弯折方向与所述滑卷区域103的卷曲方向相反。
具体地，所述弯折区域101可内折成楔形，可满足弯折半径≤1.5mm的设计。
所述滑卷区域103可滑动外折成“U”型状，可满足弯折半径为2.5~3mm的设计。
请参阅图9，基于上述支撑板10的应用，本发明实施例还提供一种折叠显示屏100，所述折叠显示屏100包括上述任一实施例中的支撑板10和设置于所述支撑板10一侧的柔性显示面板30。
所述柔性显示面板30包括与所述支撑板10的弯折区域101对应的弯折部301、与所述支撑板10的滑卷区域103对应的滑卷部303、以及与所述支撑板10的非弯折区域102对应的平面部302。进一步地，所述折叠显示屏100还包括背板20、偏光片40以及触控层50，所述背板20设置于所述柔性显示面板30与所述支撑板10之间，所述偏光片40设置于所述柔性显示面板30背离所述支撑板10的一侧，所述触控层50设置于所述偏光片40背离所述柔性显示面板30的一侧。
一种实施例中，所述触控层50背离所述柔性显示面板30的一侧还设置有盖板，所述盖板与所述触控层50之间通过第一粘结层贴附。
所述背板20与所述支撑板10之间通过第二粘结层贴附。
其中，所述第一粘结层和第二粘结层包括但不限于压敏胶（PSA）。
进一步地，一种实施例中所述背板20与所述支撑板10之间还设置有热塑性聚氨酯树脂薄膜，热塑性聚氨酯树脂具有高张力、高拉力、强韧和耐老化的特性。
热塑性聚氨酯树脂薄膜与所述背板20之间、所述热塑性聚氨酯树脂薄膜与所述支撑板10之间均可通过粘结层来贴附。
可通过调节各个粘结层的厚度，来调节所述折叠显示屏100的中性层的位置，使得所述柔性显示面板30所在的膜层更接近于中性层的位置，从而增强折叠显示屏100的弯折性能。
进一步地，本实施例以所述支撑板10包括一个弯折区域和一个滑卷区域103为例进行说明，但不限于此，在其他实施例中，所述支撑板可包括更多个弯折区域和两个滑动区域。
具体地，所述支撑板10包括依次分布的第一非弯折区域102A、依次排布的第一非弯折区域102A、弯折区域101、第二非弯折区域102B、滑卷区域103。
对应地，所述柔性显示面板30包括依次分布的第一平面部302A、弯折部301、第二平面部302B、滑卷部303。
请参阅图10中的A和B，图10中的A为所述折叠显示屏100的正面示意图，图10中的B为所述折叠显示屏100的反面示意图。在展平状态时，所述折叠显示屏100包括相对的正面和反面。
在展平状态时，所述柔性显示面板30的所有部分的显示面均位于正面，所述折叠显示屏100的显示面积最大，可应用于电脑场景。
请参阅图11，图11中的C为所述折叠显示屏100的滑卷部303滑动卷曲至背面后的正面示意图，图11中的D为所述折叠显示屏100的滑卷部303滑动卷曲至背面后的背面示意图。所述滑卷部303从展平到折叠过程中，在发生滑动的同时发生卷曲，所述滑卷部303滑动外折到所述第二平面部302B的背面（面向第二非弯折区域102B的一侧），折叠显示屏100对应滑卷部303的显示面位于背面，折叠显示屏100的显示面积减小，此时所述第一平面部302A和所述第二平面部302B一起形成显示面，可应用于pad场景。
一般弯折部301的弯折半径不宜过大，其所占据的显示面很小，因此，本发明实施例的所述折叠显示屏100的显示面主要由三部分组成，即滑卷部303、第二平面部302B、第一平面部302A组成。本发明实施例的折叠显示屏100可包括两次不同形式的折叠，为了使得两次折叠后，上述三部分能重叠不占据过多的空间，较佳地，滑卷部303、第二平面部302B以及第一平面部302A的长度、宽度可大致相等。
请参阅图12和图13，图12中的E为所述折叠显示屏100的弯折部301在内折时的正面示意图，图12中的F为所述折叠显示屏100的弯折部301在内折时的背面示意图，图13中的G和H均为所述折叠显示屏100的弯折部301完全弯折后的背面示意图。所述弯折部301在内折过程中，带动第一平面部302A弯折至所述第二平面部302B的正面（背离第二非弯折区域102B的一侧），所述折叠显示屏100对应第一平面部302A的部分内折至所述折叠显示屏100的正面，进一步减小折叠显示屏100的显示面积，此时第一平面部302A对应的显示面和第二平面部302B对应的显示面相对，无法进行显示，因此只有位于背面的滑卷部303对应的部分为显示面，可应用于手机场景。
本发明实施例通过将支撑板10设计为同时具有弯折区和滑卷区的结构，并在弯折区和滑卷区设计有阵列的第一开孔11，既能起到支撑柔性显示面板的作用，提高柔性显示面板的平整度，又能使得弯折区的支撑板具有良好的延伸性能和恢复形变能力，能够改善现有技术中柔性显示面板的弯折部产生的波纹和折痕现象；此外，第一开孔11包括沿不同方向延伸的第一子开孔111、第二子开孔112，能够同时兼顾弯折区域101的弯折应力的释放和滑卷区域103的弯折应力及拉伸应力的释放，使得支撑板10在两个区域均具有良好的延伸性能和恢复形变能力。
可以理解的是，对本领域普通技术人员来说，可以根据本申请的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本申请所附的权利要求的保护范围。

Claims (22)

  1. 一种支撑板，用于支撑柔性显示面板，其中，包括：
    至少一弯折区域，所述弯折区域用于弯折；
    至少一滑卷区域，靠近所述支撑板的边缘，所述滑卷区域用于滑动和卷曲；
    非弯折区域，设置于每一所述弯折区域的两相对侧、以及所述弯折区域与所述滑卷区域之间；其中，
    任一所述弯折区域和任一所述滑卷区域均包括阵列设置的多个第一开孔。
  2. 根据权利要求1所述的支撑板，其中，任一所述第一开孔包括两个沿第一方向延伸、并沿垂直于所述第一方向排布的第一子开孔，以及位于两所述第一子开孔之间并沿第二方向延伸的第二子开孔，所述第二方向与所述第一方向不同。
  3. 根据权利要求2所述的支撑板，其中，任意相邻两列或者相邻两行的多个所述第一开孔错位排列。
  4. 根据权利要求3所述的支撑板，其中，所述第一方向和所述第二方向垂直，任一所述第一开孔的两所述第一子开孔平齐设置。
  5. 根据权利要求4所述的支撑板，其中，所述第一开孔沿所述第一方向的最大长度为L，相邻两列所述第一开孔的第二子开孔沿所述第二方向的中心线之间的间距为S，L/2＜S＜L。
  6. 根据权利要求5所述的支撑板，其中，所述第一开孔沿所述第二方向的最大长度为W，所述第一子开孔沿所述第二方向的最大宽度为W1，相邻两行所述第一开孔的第二子开孔沿所述第一方向的中心线之间的间距为D，W1＜D＜（W-2W1）。
  7. 根据权利要求6所述的支撑板，其中，所述支撑板还包括多个第二开孔，所述第二开孔沿所述第二方向延伸，所述第二开孔沿所述第二方向与所述第一开孔交替排布。
  8. 根据权利要求7所述的支撑板，其中，任一所述第二开孔沿所述第二方向的中心线与其同列的所述第一开孔的第二子开孔沿所述第二方向的中心线重合。
  9. 根据权利要求2所述的支撑板，其中，任意相邻两行的第一子开孔错位分布，奇数行的第一子开孔对齐分布，偶数行的第一子开孔对齐分布。
  10. 根据权利要求2所述的支撑板，其中，任意连续排列的四列第二子开孔中的任意两列第二子开孔错位分布。
  11. 根据权利要求2所述的支撑板，其中，同一所述第一开孔中，所述第二子开孔连通两所述第一子开孔。
  12. 根据权利要求2所述的支撑板，其中，同一所述第一开孔中，所述第二子开孔与两所述第一子开孔之间均具有间隙。
  13. 根据权利要求2所述的支撑板，其中，所述第一子开孔的长度大于所述第二子开孔的长度。
  14. 根据权利要求2所述的支撑板，其中，所述弯折区域和所述滑卷区域均包括中间区域及位于所述中间区域两侧且临近自由边的边缘区域，所述边缘区域设置有多个沿所述自由边向所述中间区域延伸的第三开孔。
  15. 根据权利要求14所述的支撑板，其中，所述第三开孔沿所述第一方向延伸，且多个所述第三开孔沿与所述第一方向垂直的方向排布，任一所述第三开孔与至少一个所述第一子开孔同行设置。
  16. 根据权利要求15所述的支撑板，其中，所述第三开孔包括长度不同的第三子开孔和第四子开孔，所述第三子开孔和所述第四子开孔依次交错设置。
  17. 根据权利要求16所述的支撑板，其中，所述第三开孔的形状为“U”型。
  18. 根据权利要求2所述的支撑板，其中，所述弯折区域沿一弯折轴线弯折，所述滑卷区域的滑动方向与所述弯折轴线相互垂直。
  19. 根据权利要求18所述的支撑板，其中，所述第一子开孔的延伸方向与所述弯折轴线所在的方向相同，所述第二子开孔的延伸方向与所述滑卷区域的滑动方向相同。
  20. 根据权利要求1所述的支撑板，其中，所述支撑板包括依次排布的第一非弯折区域、弯折区域、第二非弯折区域以及滑卷区域，所述弯折区域的弯折方向与所述滑卷区域的卷曲方向相反。
  21. 一种折叠显示屏，其中，包括支撑板以及设置于所述支撑板一侧的柔性显示面板，其中，
    所述支撑板包括：至少一弯折区域，所述弯折区域用于弯折；至少一滑卷区域，靠近所述支撑板的边缘，所述滑卷区域用于滑动和卷曲；非弯折区域，设置于每一所述弯折区域的两相对侧、以及所述弯折区域与所述滑卷区域之间；任一所述弯折区域和任一所述滑卷区域均包括阵列设置的多个第一开孔；
    所述柔性显示面板包括与所述支撑板的弯折区域对应的弯折部、与所述支撑板的滑卷区域对应的滑卷部、以及与所述支撑板的非弯折区域对应的平面部。
  22. 根据权利要求21所述的折叠显示屏，其中，所述折叠显示屏还包括：
    背板，设置于所述柔性显示面板与所述支撑板之间；
    偏光片，设置于所述柔性显示面板背离所述支撑板的一侧；以及
    触控层，设置于所述偏光片背离所述柔性显示面板的一侧。
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