WO2023005342A1 - 一种支撑板、显示屏和电子设备 - Google Patents

一种支撑板、显示屏和电子设备 Download PDF

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Publication number
WO2023005342A1
WO2023005342A1 PCT/CN2022/092311 CN2022092311W WO2023005342A1 WO 2023005342 A1 WO2023005342 A1 WO 2023005342A1 CN 2022092311 W CN2022092311 W CN 2022092311W WO 2023005342 A1 WO2023005342 A1 WO 2023005342A1
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WO
WIPO (PCT)
Prior art keywords
strip
support plate
shaped groove
groove
plate surface
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2022/092311
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English (en)
French (fr)
Inventor
熊源
王枝泽
张玉军
郭宁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honor Device Co Ltd
Original Assignee
Honor Device Co Ltd
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 Honor Device Co Ltd filed Critical Honor Device Co Ltd
Priority to US18/272,476 priority Critical patent/US12501567B2/en
Priority to EP22847956.4A priority patent/EP4258250B1/en
Publication of WO2023005342A1 publication Critical patent/WO2023005342A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/03—Covers
    • 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 OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1615—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function
    • G06F1/1624—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with sliding enclosures, e.g. sliding keyboard or display
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; 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 OR CALCULATING; 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

Definitions

  • the present application relates to the technical field of display screens, in particular to a support plate, a display screen and electronic equipment.
  • the display screen of the folding screen device may include a three-layer stack structure, and the three-layer stack structure includes a support plate, a display panel, and a cover plate sequentially from bottom to top.
  • the support plate may include at least one bending area, and the display screen is used to achieve bending and folding in the bending area.
  • Embodiments of the present application provide a support plate, a display screen, and electronic equipment, which can solve the stamping problem of a foldable display screen, avoid crack-like appearance on the display screen, and improve the display performance of the display screen.
  • the embodiment of the present application provides a support board, which includes: a first board surface and a second board surface; the first board surface and the second board surface are arranged back to back, and the first board surface is used for display Panel bonding;
  • the support plate includes a bending area, and the support plate is used to generate bending along the preset axis L in the bending area;
  • the bending area is provided with a hollow structure, and the hollow structure includes multiple through grooves, and multiple through grooves
  • the grooves are distributed in an array along the direction perpendicular to the axis L; each through groove includes 1 first strip-shaped groove and N second strip-shaped grooves, N is a positive integer greater than 1, where: the first strip-shaped groove The second strip-shaped groove is set parallel to the axis L; the first strip-shaped groove is set on the first plate surface, forming a certain depth toward the second plate surface, and the first strip-shaped groove is continuous along the axis L direction And run through the first plate surface; the second strip-shaped groove is
  • a first strip-shaped groove is provided on the first surface of the support plate that is bonded to the display panel.
  • the first strip-shaped groove is continuous along the axis L direction and runs through the first plate surface, forming a unified Edge structure, which makes the stress distribution of the support plate uniform when it is bent, so that the display screen will not be molded due to uneven stress distribution on the bonding surface of the support plate and the display panel, which can improve the display performance of the display screen .
  • the second bar-shaped grooves distributed in an array along the axis L direction enable the support plate to realize structural continuity on the second plate surface and ensure the structural strength of the support plate.
  • the centerlines of the N second strip-shaped grooves coincide with the projection of the centerlines of the first strip-shaped grooves in the thickness direction of the support plate, thereby improving the continuity of the through grooves in the depth direction.
  • the depth of the second strip-shaped groove is greater than the depth of the first strip-shaped groove.
  • the continuous structure between two adjacent second strip-shaped grooves along the direction of the axis L can have a relatively large thickness, which is beneficial to improving the structural strength of the support plate.
  • the first bar-shaped groove is of equal width.
  • the equal-width structure can improve the uniformity of the edge structure, improve the uniformity of the stress distribution of the support plate when it is bent, and avoid stamping of the display screen.
  • the second groove includes a first groove segment and a second groove segment located at both ends of the first groove segment, the width of the second groove segment is greater than the width of the first groove segment, and the width of the second groove segment is greater than that of the first groove segment. Both ends are rounded. Since the width of the second slot section is greater than that of the first slot section, the radius of the rounded corner structure is larger, which can reduce the stress concentration at the intersection of the two ends of the second strip-shaped slot and the first strip-shaped slot.
  • the width of the second slot segment is greater than the width of the first strip-shaped slot, and the width of the first slot segment is the same as that of the first strip-shaped slot.
  • the first strip-shaped slot and the first slot section can form a through slot with the same width as a whole, the structural integrity is better, and the uniformity of stress distribution can be improved, while the two ends of the second strip-shaped slot can form larger radius
  • the rounded corner structure can reduce the stress concentration at the intersection of the two ends of the second strip-shaped groove and the first strip-shaped groove.
  • the through groove is filled with a flexible medium
  • the flexible medium forms a first filling plane in the first strip-shaped groove, and a second filling plane in the second strip-shaped groove, and the first filling plane and the first plate surface Located in the same plane, the second filling plane is located in the same plane as the second plate surface.
  • Flexible media can improve the flatness of the support plate and also improve the impression
  • the flexible medium is liquid silicone.
  • the material of the support plate includes any one of the following: TA4 titanium alloy, stainless steel, polyvinyl alcohol high modulus fiber PVA.
  • the embodiment of the present application provides a display screen, which includes: a cover plate, a display panel, and the support plate provided in the first aspect of the embodiment of the present application and its various implementations; the display panel is bonded by optical glue on the first surface of the support plate; the cover plate is pasted on the side of the display panel facing away from the support plate through optical glue.
  • an embodiment of the present application provides an electronic device, and the electronic device includes one or more display screens, wherein at least one display screen is the display screen provided in the second aspect of the embodiment of the present application.
  • FIG. 1 is a schematic structural diagram of a folding screen device shown in an embodiment of the present application
  • Fig. 2 is a schematic structural diagram of a display screen of a folding screen device provided in an embodiment of the present application
  • Fig. 3 is a schematic diagram of the expanded support plate shown in the embodiment of the present application.
  • Fig. 4 is a schematic structural view of the support plate in the bending area shown in the embodiment of the present application.
  • Fig. 5 is a schematic diagram of the lamination of the display panel and the support plate shown in the embodiment of the present application;
  • Fig. 6 is a schematic structural view of a support plate provided by an embodiment of the present application.
  • Fig. 7 is a schematic structural view of the first panel shown in the embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of the second deck shown in the embodiment of the present application.
  • Fig. 9 is a schematic diagram of the distribution mode of the second bar-shaped groove provided by the embodiment of the present application.
  • Fig. 10A is a cross-sectional view of the first groove section of the first strip-shaped groove and the second strip-shaped groove according to the embodiment of the present application;
  • Fig. 10B is a cross-sectional view of the second groove segment of the first strip-shaped groove and the second strip-shaped groove according to the embodiment of the present application;
  • Fig. 11 is a cross-sectional view of the first bar-shaped groove and the connection structure shown in the embodiment of the present application.
  • FIG. 1 is a schematic structural diagram of a folding screen device shown in an embodiment of the present application.
  • structure a in FIG. 1 is a schematic structural diagram of an inner folding screen device
  • structure b in FIG. 1 is a structural schematic diagram of an outer folding screen device.
  • the inner folding screen device means that the body 10 of the electronic device can be folded toward the side of the display screen 11 , and the display screen 11 is hidden in the body 10 of the electronic device after the body 10 of the electronic device is folded.
  • the inner side thereby forming the effect that the display screen 11 is hidden in the folded state of the fuselage 10 and presented in the unfolded state of the fuselage 10; as shown in structure b in FIG. It can be folded toward the back side of the fuselage 10, and the display screen 11 surrounds the outside of the fuselage 10 of the electronic device after the fuselage 10 of the electronic device is folded, thereby forming the display screen 11 to surround the fuselage 10 in the folded state of the fuselage 10,
  • a surround screen is formed to present the effect of a normal straight screen when the fuselage 10 is unfolded.
  • the display screen of a folding screen device needs to be bent frequently, compared with traditional electronic devices, the display screen of a folding screen device needs to be designed adaptively for its frequent bending usage scenarios, so that The display maintains a good support shape under different opening and closing states of the fuselage.
  • FIG. 2 is a schematic structural diagram of a display screen of a folding screen device provided in an embodiment of the present application.
  • the display screen of the folding screen device may include a three-layer stacked structure, which sequentially includes a support plate 21 , a display panel 22 (panel) and a cover plate 23 (cover) from bottom to top.
  • the support plate 21 is the bottom layer of the display screen, generally made of high-modulus plates, such as stainless steel, TA4 titanium alloy, polyvinyl alcohol high-modulus fiber PVA, etc., or other materials with certain plasticity and rigidity.
  • the board 21 is used to support and maintain the form of the display screen in various opening and closing states of the fuselage.
  • the display panel 22 is the middle layer of the display screen, which can be pasted on the top of the support plate 21 by optical glue (optical clear adhesive, OCA), and the display panel 22 can be a flexible organic light-emitting diode (Organic Light-Emitting Diode, OLED) display panel 22. It can also be other flexible (that is, bendable) display panels 22, such as flexible Micro LED display panels 22, Mini LED display panels 22, etc., which are not limited in this embodiment of the present application.
  • the cover plate 23 is the uppermost layer of the display screen, and can be pasted on the top of the display panel 22 by optical glue OCA.
  • the cover plate 23 is generally made of glass, and in foldable screen devices, consider In terms of bending performance, the cover plate 23 can be made of a transparent film material, such as a transparent polyimide film CPI, or other materials, which is not limited in this embodiment of the present application.
  • a transparent film material such as a transparent polyimide film CPI, or other materials, which is not limited in this embodiment of the present application.
  • Fig. 3 is a schematic diagram of the unfolded support plate shown in the embodiment of the present application.
  • the support plate 21 may include at least one bending area 31 , and the area outside the bending area 31 is a flat area 32 .
  • the bending area 31 refers to the area that will bend when the body of the folding screen device is folded
  • the flat area 32 refers to the area that will not bend when the body of the folding screen device is folded.
  • the number of bending areas 31 is determined by the number of folds of the body of the folding screen device. If the body of the folding screen device is only folded once (that is, a single folding screen device), then the display screen may include a bending area 31.
  • the display screen may include two bending regions 31.
  • the display screen shown in FIG. 3 includes a bending area 31 distributed up and down, and flat areas 32 are located on the left and right sides of the bending area 31 for realizing left and right bending of the body of the folding screen device.
  • the number of bending regions 31 of the display screen is beyond the scope of the discussion of the embodiment of the present application, so the following will not elaborate further.
  • Fig. 4 is a schematic diagram of the structure of the support plate in the bending area shown in the embodiment of the present application.
  • the support plate 21 is grooved according to a specific pattern (also called pattern pattern) in the bending area 31 to form a hollow structure 40 .
  • the pattern is generally an array of strip-shaped grooves 41 extending along the axis L of the bending support plate 21 .
  • the strip-shaped groove 41 is generally discontinuous in the direction of the axis L, so as to ensure that the support plate 21 has structural continuity in the direction perpendicular to the axis L.
  • the structural changes formed at the discontinuities of the bar-shaped grooves 41 will make the stress distribution of the support plate 21 at the discontinuities of the bar-shaped grooves 41 uneven, resulting in imprints.
  • FIG. 5 is a schematic diagram of lamination of a display panel and a support plate shown in an embodiment of the present application.
  • the display panel is generally provided with a polyester film PET on the side facing the support plate 21, and the support plate 21 and the polyester film PET pass through the optical adhesive OCA. fit together.
  • the optical glue OCA between the polyester film PET and the support plate 21 is misaligned due to bending, and overflows or shrinks in the hollow area formed by the strip groove 41 . Due to the uneven stress distribution of the support plate 214 at the discontinuity of the strip groove 41 , the spilled or shrunk optical glue cannot return to its original state after the display screen is unfolded, forming local alternate accumulation, and finally forming a stamp.
  • the embodiment of the present application provides a support plate.
  • Fig. 6 is a schematic structural diagram of a support plate provided by an embodiment of the present application.
  • the support board 100 includes two back-to-back board surfaces.
  • these two board surfaces of the support board 100 are referred to as the first board surface 110 and the second board surface 120 here.
  • the first board surface 110 refers to the board surface of the support plate 100 for bonding to the display panel
  • the second board surface 120 refers to the board surface of the support board 100 facing away from the display panel.
  • the support plate 100 includes at least one bending area 31, and the support plate 100 can be bent along the preset axis L in the bending area 31.
  • the display screen can also be bent along the axis L at the bending area 31 .
  • the bending area can be divided into an inner bending area or an outer bending area, wherein the inner bending area refers to the area where the support plate 100 bends toward the display panel , the outer bending area refers to the area of the support plate 100 that is bent in a direction away from the display panel.
  • the bending area 31 of the support plate 100 is provided with a hollow structure 200, which can be composed of a plurality of through grooves 210 distributed in the bending area 31, and the plurality of through grooves 210 are along the vertical direction
  • the directions of the axis lines L are distributed in an array at certain intervals.
  • the through groove 210 runs through from the first plate surface 110 of the support plate 100 to the second plate surface 120 of the support plate 100 as a whole, which reduces the stress generated when the support plate 100 is bent by removing material, and facilitates the lifting of the support plate. 100% bending performance.
  • each through groove 210 may be composed of one first bar-shaped groove 211 arranged on the first plate surface 110 and N second bar-shaped grooves 212 arranged on the second plate surface 120 ,
  • the first strip-shaped groove 211 and the second strip-shaped groove 212 are arranged parallel to the axis L, and N is a positive integer greater than 1.
  • the structure of the through groove 210 will be specifically described below with reference to more drawings.
  • Fig. 7 is a schematic structural diagram of the first deck shown in the embodiment of the present application.
  • the first plate surface 110 is provided with a plurality of first strip-shaped grooves 211, the first strip-shaped grooves 211 are preferably straight grooves, each first strip-shaped groove 211 belongs to a through groove 210, and the first strip-shaped groove 211 belongs to a through groove 210.
  • Shaped grooves 211 can be obtained by etching a certain depth on the first plate surface 110.
  • each first bar-shaped groove 211 belonging to each through groove 210 is distributed in an array at intervals along a direction perpendicular to the axis L as a whole. .
  • the first strip groove 211 extends continuously from one end side of the support plate to the other end side along the axis L direction, so as to be continuous along the axis L direction and penetrate the first plate surface 110 .
  • the first strip-shaped groove 211 is preferably an equal-width structure, that is, the width of each position of the first strip-shaped groove 211 in its length direction is the same, so that each position of the first strip-shaped groove 211 in its length direction has a uniform edge structure.
  • a first strip-shaped groove 211 is provided on the first surface 110 of the display panel, and the first strip-shaped groove 211 is continuous along the axis L direction and runs through the first plate surface 110 , so that a unified edge structure is formed on the first plate surface 110, and the edge structure makes the stress distribution of the support plate uniform when it is bent. Therefore, if the support plate is used to make a display screen, the optical glue OCA between the support plate and the display panel will not be partially accumulated after bending due to uneven stress distribution, so there will be no mold printing, and the display screen will be improved. display performance.
  • the number of first strip-shaped grooves 211 (that is, the number of through grooves 210) can be determined according to the width of the bending zone in the direction perpendicular to the axis L, the larger the width of the bending zone, the first The more the number of strip-shaped grooves 211 can be, the smaller the width of the bending area can be, and the fewer the number of first strip-shaped grooves 211 can be.
  • Fig. 8 is a schematic structural diagram of a second deck shown in the embodiment of the present application.
  • the second strip-shaped groove 212 is preferably a straight groove, which can be obtained by etching a certain depth on the second plate surface 120, and the length of the second strip-shaped groove 212 Less than the width of the support plate in the direction of the axis L.
  • the N second bar-shaped grooves 212 belonging to the same through groove 210 are all located on the projection of the corresponding first bar-shaped grooves 210 on the second plate surface 120, and the N second bar-shaped grooves 212 are along the axis They are arranged in an array along the direction of the line L, and there is a certain interval F between two second strip-shaped grooves 212 adjacent along the direction of the axis L, forming a connection structure 213 with a width F.
  • the second strip-shaped groove 212 starts from the second plate surface 120 and is formed to the bottom of the first strip-shaped groove 211 in the direction of the first plate surface, and communicates with the corresponding first strip-shaped groove 211, thereby A through groove 210 structure is formed.
  • the centerline C1 of the N second strip-shaped grooves 212 and the centerline C2 of the first strip-shaped groove 211 are within the thickness of the support plate. The projections of the directions coincide.
  • the shape design of the second strip-shaped groove 212 does not need to consider the problem of embossing, so the second strip-shaped groove 212 can be of equal width or non-uniform.
  • the equal-width structure that is, the width of each position of the second strip-shaped groove 212 in its length direction may be equal or unequal.
  • the second strip groove 212 when the second strip groove 212 is an equal width structure, its width can be equal to or not equal to the width of the first strip groove 211; when the second strip groove 212 is a non-equal width structure, its width In some positions it may be equal to the width of the first strip-shaped groove 211, in some positions it may be greater than the width of the first strip-shaped groove 211, and in some positions it may be smaller than the width of the first strip-shaped groove 211.
  • the second bar-shaped groove 212 may specifically include a first groove segment 310 and second groove segments 320 located at both ends of the first groove segment 310 along its length direction.
  • the first slot segment 310 and the second slot segment 3203 have different widths overall, for example: the overall width of the first slot segment 310 is B1, and the overall width of the second slot segment 320 is B2.
  • the width B2 of the second groove segment 320 is preferably greater than the width B1 of the first groove segment 310 , so that the second bar-shaped groove 212 forms a dumbbell-shaped structure with wide ends and a thin center as a whole.
  • the second slot segment 320 with a larger width can form a rounded corner structure 321 with a larger radius at both ends of the second bar-shaped slot 212, which is beneficial to reduce stress concentration when the support plate is bent.
  • Fig. 9 is a schematic diagram of the distribution mode of the second bar-shaped grooves provided by the embodiment of the present application.
  • the second strip-shaped groove 212 has a certain length G along the direction of the axis L where the support plate is bent;
  • the rounded corner structure 321 makes the side of the second strip groove 212 smooth as a whole, and no large stress concentration occurs when bending occurs.
  • the distribution mode of the plurality of second strip-shaped grooves 212 can be regarded as taking the second strip-shaped grooves 212a and the second strip-shaped grooves 212b adjacent along the width direction as the basic array unit 150, and the basic array unit 150 along the second The lengthwise and widthwise rectangular arrays of the strip-shaped grooves 212 are obtained, and the second strip-shaped grooves 212 a and the second strip-shaped grooves 212 b are located on the projections of two adjacent first strip-shaped grooves.
  • the two second strip-shaped grooves 212 in the basic array unit 150 are referred to as the second strip-shaped groove 212a and the second strip-shaped groove 212b.
  • the dimensions can be the same or different.
  • the second strip-shaped groove 212b is located on one side of the second strip-shaped groove 212a along the width direction of the second strip-shaped groove 212a, and is staggered with the second strip-shaped groove 212a along the length direction by the first distance W1, so that the second strip-shaped groove 212a
  • the center of the shaped groove 212a is located at the center of two adjacent second strip shaped grooves 212b.
  • FIG. 10A and 10B are cross-sectional views of the first strip-shaped groove and the second strip-shaped groove shown in the embodiment of the present application.
  • Fig. 10A can be, for example, a cross-sectional view of the first groove segment of the first groove and the second groove
  • Fig. 10B can be, for example, a cross-section of the second groove segment of the first groove and the second groove cutaway view. As shown in FIG. 10A and FIG.
  • the first strip-shaped groove 211 has a certain depth D1 in the thickness direction of the support plate 100
  • the second strip groove 212 has a certain depth D2 in the thickness direction of the support plate 100
  • the sum of the depth D1 of the first strip groove 211 and the depth D2 of the second strip groove 212 is equal to the thickness H of the support plate 100 .
  • the width B2 of the second groove segment 320 of the second strip-shaped groove 212 is preferably greater than the width B1 of the first strip-shaped groove 211 .
  • both ends of the second strip-shaped groove 212 can form a rounded structure with a larger radius, which can reduce the stress concentration at the intersection of the two ends of the second strip-shaped groove 212 and the first strip-shaped groove 211 .
  • the first groove section 310 of the second strip-shaped groove 212 The width B1 is preferably equal to the width B1 of the first strip groove 211 . In this way, the first groove section 310 of the first strip-shaped groove 211 and the second strip-shaped groove 212 can form a through groove with the same width as a whole, the structural integrity is better, and the uniformity of stress distribution can be improved.
  • Fig. 11 is a cross-sectional view of the first bar-shaped groove and the connection structure shown in the embodiment of the present application.
  • the first strip-shaped groove 211 is formed on the support plate 100.
  • the thickness direction has a certain depth D1
  • the remaining part of the support plate 100 except the first strip-shaped groove 211 is the connection structure 213, so the thickness H2 of the connection structure 213 is the same as the depth D2 of the second strip-shaped groove.
  • the thickness H2 of the connection structure 213 (ie the depth D2 of the second strip-shaped groove 212) is preferably greater than the depth D1 of the first strip-shaped groove 211, so that the connection structure 213 can achieve a relatively large thickness, In order to improve the overall strength of the support plate 100 .
  • the thickness H2 of the connection structure 213 may preferably be greater than four-fifths of the thickness H of the support plate 100 , and the depth D1 of the first strip groove 211 is correspondingly less than one-fifth of the thickness H of the support plate 100 .
  • the support plate 100 realizes uniform distribution of stress during bending through the first bar-shaped groove 211 with a small depth in the bending area, and at the same time, the structural continuity of the support plate 100 is ensured through the connection structure 213 with a relatively large thickness.
  • the structural strength of the support plate 100 is improved as much as possible.
  • the first strip-shaped groove 211 and the second strip-shaped groove 212 are also filled with a flexible medium 130 (Figure 10A, Figure 10B, Figure 11 only The flexible medium 130 is shown in part of the first strip-shaped groove 211 and the second strip-shaped groove 212, and the first strip-shaped groove 211 and the second strip-shaped groove 212 of which the flexible medium 130 is not shown are also filled with the flexible medium 130) After being filled, the flexible medium 130 is located in the same plane as the ungrooved area of the support plate 100 , which improves the flatness of the support plate 100 and also has the effect of improving the impression.
  • the flexible medium 130 may be, for example, liquid silicone rubber (LSR).
  • LSR liquid silicone rubber
  • LIMS liquid silicone injection molding system
  • liquid silicone is a two-component glue, including A glue and B glue.
  • a glue and B glue are liquid at room temperature, and can be cured quickly after being mixed and heated to a certain temperature.
  • the mixing process that is, mix A glue and B glue; then, inject the mixed liquid silicone into the first bar-shaped groove 211 and the second bar-shaped groove 212, thereby filling the entire channel Groove; finally, heat and pressurize the injected liquid silica gel to make it solidify, the cured liquid silica gel will be integrated with the main structure of the support plate 100, and the liquid silica gel and the surface of the support plate 100 are located in the same plane.
  • the embodiment of the present application also provides a display screen.
  • the display screen includes the support plate, the display panel and the cover plate provided by various implementations of the embodiments of the present application, so the display screen does not produce imprints and cracks, and has good display performance.
  • the embodiment of the present application also provides an electronic device, for example, the electronic device may be a folding screen device, a scrolling screen device, or any electronic device with a bendable display screen.
  • the electronic device may include one or a display screen, wherein at least one display screen is the display screen provided by the embodiment of the present application, or at least one display screen includes the support plate provided by the embodiment of the present application.
  • the electronic device may be an inner folding screen device, and the inner folding screen device may include an inner screen and an outer screen, wherein the inner screen refers to a display screen that is hidden when the fuselage is folded, and the outer screen refers to The display screen that is exposed in any state of the fuselage, the inner screen is the display screen provided by the embodiment of the present application.

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Abstract

一种支撑板、显示屏和电子设备。其中，支撑板（100）包括：第一板面（110）和第二板面（120）；第一板面（110）和第二板面（120）背对背设置，第一板面（110）用于与显示面板贴合；支撑板（100）包括弯折区（31），支撑板（100）用于在弯折区（31）沿预设的轴心线L产生弯折；第一板面（110）设置第一条形槽（211），第二板面（120）设置有沿轴心线L方向间隔阵列分布的第二条形槽（212）。第一条形槽（211）沿轴心线L方向连续且贯穿第一板面（110），形成统一的边缘结构，边缘结构使支撑板（100）在弯折时的应力分布均匀，使显示屏在支撑板（100）与显示面板的贴合面不会由于应力分布不均匀而产生模印，能够提高显示屏的显示性能。另外，沿轴心线L方向间隔阵列分布的第二条形槽（212）使支撑板（100）在第二板面（120）具有结构连续性，保证了支撑板（100）的结构强度。

Description

一种支撑板、显示屏和电子设备
本申请要求于2021年7月26日提交到国家知识产权局、申请号为202110846487.5、发明名称为“一种支撑板、显示屏和电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示屏技术领域，尤其涉及一种支撑板、显示屏和电子设备。
背景技术
近年来，电子设备的显示屏技术发展迅速，特别是可弯曲的柔性屏的产生使得电子设备得以开发出更多的产品形态，其中，折叠屏设备就是目前新兴的一种产品形态。折叠屏设备的显示屏可以包括三层堆叠结构，该三层堆叠结构自下而上依次包括支撑板、显示面板和盖板。其中，支撑板可以包括至少一个弯折区，显示屏用于在弯折区实现弯曲折叠。
目前，技术人员会对支撑板的弯折区按照一定的图案进行开槽处理，提供给支撑板更多的形变空间，以减小支撑板弯折时产生的内应力，提高弯折区的弯折性能。然而，镂空结构破坏了支撑板的结构连续性和整体性，使其在弯折时在不同位置的应力分布不均匀，这种不均匀应力分布容易使显示屏在支撑板与显示面板的贴合面产生贴合痕迹(也称模印)，模印导致显示屏产生类似裂纹的观感，影响显示屏的显示性能。
发明内容
本申请实施例提供了一种支撑板、显示屏和电子设备，能够解决可折叠显示屏的模印问题，避免显示屏出现类似裂纹的观感，提高显示屏的显示性能。
第一方面，本申请实施例提供了一种支撑板，该支撑板包括：第一板面和第二板面；第一板面和第二板面背对背设置，第一板面用于与显示面板贴合；支撑板包括弯折区，支撑板用于在弯折区沿预设的轴心线L产生弯折；弯折区设置有镂空结构，镂空结构包括多个通槽，多个通槽沿着垂直于轴心线L的方向阵列分布；每个通槽包括1个第一条形槽和N个第二条形槽，N为大于1的正整数，其中：第一条形槽与第二条形槽均与轴心线L平行设置；第一条形槽设置于第一板面，向第二板面方向形成一定深度，第一条形槽沿着轴心线L方向连续且贯穿第一板面；第二条形槽设置于第二板面，向第一板面方向形成至第一条形槽底部，与第一条形槽连通；第二条形槽的长度小于支撑板沿轴心线L方向上的宽度，N个第二条形槽沿着轴心线L方向间隔阵列分布。
本申请实施例提供的支撑板，在其与显示面板贴合的第一板面设置第一条形槽，第一条形槽沿轴心线L方向连续且贯穿第一板面，形成统一的边缘结构，该边缘结构使支撑板在弯折时的应力分布均匀，使显示屏在支撑板与显示面板的贴合面不会由于应力分布不均匀而产生模印，能够提高显示屏的显示性能。另外，沿轴心线L方向间隔阵列分布的第二条形槽使支撑板在第二板面实现了结构的连续性，保证了支撑板的结构强度。
在一种实现方式中，N个第二条形槽的中心线与第一条形槽的中心线在支撑板厚度方向的投影重合，由此提高了通槽在其深度方向上的连续性。
在一种实现方式中，第二条形槽的深度大于第一条形槽的深度。这样，沿轴心线L方向相邻的两个第二条形槽之间的连续结构可以具有较大的厚度，有利于提高支撑板的结构强度。
在一种实现方式中，第一条形槽为等宽结构。等宽结构能够提高边缘结构的统一性，提高支撑板在弯折时的应力分布均匀性，避免显示屏产生模印。
在一种实现方式中，第二条形槽包括第一槽段以及位于第一槽段两端的第二槽段，第二槽段的宽度大于第一槽段的宽度，第二条形槽的两端为圆角结构。由于第二槽段的宽度大于第一槽段的宽度，因此圆角结构的半径更大，能够降低第二条形槽两端与第一条形槽相交处的应力集中。
在一种实现方式中，第二槽段的宽度大于第一条形槽的宽度，第一槽段的宽度与第一条形槽的宽度相同。这样，第一条形槽与第一槽段整体上可以形成等宽的通槽，结构整体性更好，能够提高应力分布的均匀性，而第二条形槽两端可以形成更大半径的圆角结构，能够降低第二条形槽两端与第一条形槽相交处的应力集中。
在一种实现方式中，通槽内填充有柔性介质，柔性介质在第一条形槽形成第一填充平面，在第二条形槽形成第二填充平面，第一填充平面与第一板面位于同一平面内，第二填充平面与第二板面位于同一平面内。柔性介质能够提高支撑板的平整度，同样具有改善模印的作用
在一种实现方式中，柔性介质为液体硅胶。
在一种实现方式中，支撑板的材质包括以下任意一种：TA4钛合金、不锈钢、聚乙烯醇高模纤维PVA。
第二方面，本申请实施例提供了一种显示屏，该显示屏包括：盖板、显示面板和本申请实施例第一方面及其各实现方式提供的支撑板；显示面板通过光学胶贴合于支撑板的第一表面；盖板通过光学胶贴合在显示面板的背对支撑板的一面。
第三方面，本申请实施例提供了一种电子设备，该电子设备包括一个或者多个显示屏，其中，至少一个显示屏为本申请实施例第二方面提供的显示屏。
附图说明
图1是本申请实施例示出的折叠屏设备的结构示意图；
图2是本申请实施例提供的折叠屏设备的显示屏的结构示意图；
图3是本申请实施例示出的支撑板展开后的示意图；
图4是本申请实施例示出的支撑板在弯折区的结构示意图；
图5是本申请实施例示出的显示面板与支撑板的贴合示意图；
图6是本申请实施例提供的一种支撑板的结构示意图；
图7是本申请实施例示出的第一板面的结构示意图；
图8是本申请实施例示出的第二板面的结构示意图；
图9是本申请实施例提供的第二条形槽的分布方式示意图；
图10A是本申请实施例提供第一条形槽与第二条形槽的第一槽段的截面剖视图；
图10B是本申请实施例提供第一条形槽与第二条形槽的第二槽段的截面剖视图；
图11是本申请实施例示出的第一条形槽与连接结构的截面剖视图。
具体实施方式
近年来，电子设备的显示屏技术发展迅速，特别是可弯曲的柔性屏的产生使得电子设备得以开发出更多的产品形态，其中，折叠屏设备就是目前新兴的一种产品形态。
目前，折叠屏设备根据显示屏11折叠方向的不同，可以分为内折叠屏设备和外折叠屏设备。图1是本申请实施例示出的折叠屏设备的结构示意图。其中，图1中的结构a是内折叠屏设备的结构示意图，图1中的结构b是外折叠屏设备的结构示意图。如图1的结构a所示，内折叠屏设备是指电子设备的机身10能够向显示屏11一侧折叠，显示屏11在电子设备的机身10折叠后隐藏于电子设备的机身10内侧，由此形成显示屏11在机身10折叠状态下隐藏，在机身10展开状态下呈现的效果；如图1中的结构b所示，外折叠屏设备是指电子设备的机身10能够向机身10背面一侧折叠，显示屏11在电子设备的机身10折叠后环绕于电子设备的机身10外侧，由此形成显示屏11在机身10折叠状态下环绕机身10，形成环绕屏，在机身10展开状态下呈现正常直屏的效果。
可以理解的是，由于折叠屏设备的显示屏需要经常弯折，因此相比于传统形态的电子设备，折叠屏设备的显示屏需要针对其经常弯折的使用场景进行一些适应性设计，以使得显示屏在机身不同的开合状态下都保持良好的支撑形态。
图2是本申请实施例提供的折叠屏设备的显示屏的结构示意图。如图2所示，折叠屏设备的显示屏可以包括三层堆叠结构，该三层堆叠结构自下而上依次包括支撑板21、显示面板22(panel)和盖板23(cover)。其中：支撑板21是显示屏的最下层，一般采用高模量板材制成，例如不锈钢、TA4钛合金、聚乙烯醇高模纤维PVA等，也可以是其他具有一定塑性和刚性的材质，支撑板21用于在机身的各种开合状态下支撑和保持显示屏形态。显示面板22是显示屏中间层，可以通过光学胶(optically clear adhesive，OC A)贴合在支撑板21上方，显示面板22可以是柔性有机发光二极管(Organic Light-Em itting Diode，OLED)显示面板22，也可以是其他柔性(即可弯曲)的显示面板22，例如柔性的Micro LED显示面板22、Mini LED显示面板22等，本申请实施例对此不做限定。盖板23是显示屏的最上层，可以通过光学胶OCA贴合在显示面板22的上方，通常在非折叠屏的电子设备中，盖板23一般采用玻璃材质，而在折叠屏设备中，考虑到弯曲性能，盖板23可以采用透明的薄膜材料制成，例如透明聚酰亚胺薄膜CPI，或者其他材料，本申请实施例对此不做限定。
图3是本申请实施例示出的支撑板展开后的示意图。如图3所示，支撑板21可以包括至少一个弯折区31，弯折区31以外的区域则为平坦区32。其中，弯折区31是指在折叠屏设备的机身折叠时会发生弯折的区域，平坦区32是指在折叠屏设备的机身折叠时不会发生弯折的区域。显然，弯折区31的数量由折叠屏设备机身的折叠数量决定，如果折叠屏设备的机身只折叠一次(即单折叠屏设备)，那么显示屏可以包括一个弯折区31，如果折叠屏设备的机身折叠两次(即双折叠屏设备)，那么显示屏可以包括两个弯折区31。作为示例地，图3示出的显示屏包括一个弯折区31，呈上下分布，平坦区32位于弯折区31的左右两侧，用于实现折叠屏设备机身的左右弯折。显示屏的弯折区31数量不在本申请实施例的讨论范围内，因此以下不再过多展开说明。
图4是本申请实施例示出的支撑板在弯折区的结构示意图。如图4所示，为提高弯折性能，支撑板21在弯折区31按照特定的图案(也称pattern图案)进行开槽处理，形成镂空结构40。pattern图案一般为沿着支撑板21弯折的轴心线L方向延伸的条形槽41的阵列。条形槽41在轴心线L方向上一般为间断结构，以保证支撑板21在垂直于轴心 线L方向上具有结构的连续性。然而，在显示屏弯折过程中，条形槽41在间断处所形成的结构变化会使得支撑板21在条形槽41的间断处的应力分布不均匀，产生模印。
图5是本申请实施例示出的显示面板与支撑板的贴合示意图。下面结合图5对模印产生的原因进行具体说明，如图5所示，显示面板在面向支撑板21的一侧一般设置有聚脂薄膜PET，支撑板21与聚脂薄膜PET通过光学胶OCA贴合在一起。在显示屏弯折过程中，聚脂薄膜PET和支撑板21之间的光学胶OCA因为弯折而产生错动，在条形槽41形成的镂空区域发生外溢或收缩。由于支撑板214在条形槽41的间断处的应力分布不均匀，外溢或收缩的光学胶在显示屏展开之后无法恢复到初始状态，形成局部的交替累积，最终形成模印。
针对目前折叠屏设备的显示屏存在的问题，本申请实施例提供了一种支撑板。
图6是本申请实施例提供的一种支撑板的结构示意图。如图6所示，支撑板100包括背对背的两个板面，为便于描述，这里将支撑板100的这两个板面称作第一板面110和第二板面120。其中，第一板面110是指支撑板100的用于与显示面板贴合的板面，第二板面120是指支撑板100的背对与显示面板的板面。支撑板100包括至少一个弯折区31，支撑板100可以在弯折区31沿着预设的轴心线L产生弯折，这样，在本申请实施例提供的支撑板100与显示面板、盖板组合成显示屏之后，显示屏也可以在弯折区31沿轴心线L进行弯折。本申请实施例中，根据支撑板100的弯折方向的不同，弯折区可以分为内弯区或者外弯区，其中，内弯区是指支撑板100的向显示面板方向弯折的区域，外弯区是指支撑板100的向背对显示面板方向弯折的区域。
进一步如图6所示，支撑板100的弯折区31设置有镂空结构200，该镂空结构200可以由分布在弯折区31的多个通槽210组成，多个通槽210沿着垂直于轴心线L的方向呈一定间隔阵列分布。该通槽210整体上从支撑板100的第一板面110贯穿至支撑板100的第二板面120，以去除材料的方式降低了支撑板100弯折时产生的应力，有利于提升支撑板100的弯折性能。
进一步如图6所示，每个通槽210可以由一个设置在第一板面110的1个第一条形槽211和设置在第二板面120的N个第二条形槽212组成，且第一条形槽211与第二条形槽212均与轴心线L平行设置，N为大于1的正整数。下面将结合更多附图对通槽210的结构进行具体说明。
图7是本申请实施例示出的第一板面的结构示意图。如图7所示，第一板面110设置有多个第一条形槽211，第一条形槽211优选为直槽，每一个第一条形槽211属于一个通槽210，第一条形槽211可以通过在第一板面110蚀刻一定的深度得到，从整体上看，属于各个通槽210的各个第一条形槽211整体上沿着垂直于轴心线L的方向间隔阵列分布。第一条形槽211沿着轴心线L方向从支撑板的一端侧面不间断地延伸至另一端侧面，从而沿着轴心线L方向连续且贯穿第一板面110。第一条形槽211优选为等宽结构，即第一条形槽211在其长度方向上的各个位置宽度相同，这样，第一条形槽211在其长度方向上的各个位置均具有统一的边缘结构。
本申请实施例提供的支撑板，在其与显示面板贴合的第一板面110设置第一条形槽211，第一条形槽211沿轴心线L方向连续且贯穿第一板面110，从而在第一板面110形成统一的边缘结构，该边缘结构使支撑板在弯折时的应力分布均匀。因此，如果采用该支撑板制作显示屏，则支撑板与显示面板之间的光学胶OCA不会由于应力分布不均匀而 在弯折后产生局部积累，因此不会出现模印，提高了显示屏的显示性能。
本申请实施例中，第一条形槽211的数量(即通槽210的数量)可根据弯折区在垂直于轴心线L方向上的宽度确定，弯折区的宽度越大，第一条形槽211的数量可以越多，弯折区的宽度越小，第一条形槽211的数量可以越少。
图8是本申请实施例示出的第二板面的结构示意图。如图8所示，与第一条形槽211相对应的，第二条形槽212优选为直槽，可以通过在第二板面120蚀刻一定的深度得到，第二条形槽212的长度小于支撑板在轴心线L方向上的宽度。属于同一个通槽210的N个第二条形槽212均位于其对应的第一条形槽210在第二板面120的投影上，并且这N个第二条形槽212沿着轴心线L方向阵列分布，沿轴心线L方向相邻的两个第二条形槽212之间具有一定间隔F，形成宽度为F的连接结构213。
进一步如图8所示，第二条形槽212从第二板面120起始，向第一板面方向形成至第一条形槽211底部，与其对应的第一条形槽211连通，从而形成通槽210结构。为了提高通槽210在其深度方向上的连续性，对于同一个通槽210来说，N个第二条形槽212的中心线C1与第一条形槽211的中心线C2在支撑板厚度方向的投影重合。
可以理解的是，由于第二板面120不与显示面板贴合，因此第二条形槽212的形状设计不需要考虑模印问题，因此第二条形槽212可以是等宽结构也可以是非等宽结构，即第二条形槽212在其长度方向上的各个位置的宽度可以相等，也可以不相等。例如：当第二条形槽212为等宽结构时，其宽度可以与第一条形槽211的宽度相等，也可以不相等；当第二条形槽212为非等宽结构时，其宽度在一些位置可以与第一条形槽211的宽度相等，在一些位置可以大于第一条形槽211的宽度，在一些位置还可以小于第一条形槽211的宽度，本申请实施例对此不做限定。
在一种实现方式中，如图8所示，第二条形槽212沿其长度方向具体可以包括第一槽段310、以及位于第一槽段310两端的第二槽段320。第一槽段310与第二槽段3203整体上具有不同的宽度，例如：第一槽段310的整体宽度为B1，第二槽段320的整体宽度为B2。其中，第二槽段320的宽度B2优选大于第一槽段310的宽度B1，使得第二条形槽212整体上形成两端宽中间细的哑铃型结构。这样，宽度更大的第二槽段320能够在第二条形槽212两端形成更大半径的圆角结构321，有利于降低支撑板弯折时的应力集中。
图9是本申请实施例提供的第二条形槽的分布方式示意图。如图9所示，在一种实现方式中，第二条形槽212沿着支撑板弯折的轴心线L方向具有一定的长度G；第二条形槽212在其长度方向的两端为圆角结构321，以使得第二条形槽212的侧面整体平滑，在发生弯折时不会出现大的应力集中。多个第二条形槽212的分布方式可以看作是以沿宽度方向相邻的第二条形槽212a和第二条形槽212b为基本阵列单元150，将这个基本阵列单元150沿第二条形槽212的长度方向和宽度方向矩形阵列得到，第二条形槽212a和第二条形槽212b位于相邻的两个第一条形槽的投影上。为便于描述，这里将基本阵列单元150中的两个第二条形槽212称作第二条形槽212a和第二条形槽212b，第二条形槽212a和第二条形槽212b的尺寸可以相同也可以不同。其中，第二条形槽212b沿第二条形槽212a的宽度方向位于第二条形槽212a的一侧，并且与第二条形槽212a沿长度方向错开第一距离W1，使得第二条形槽212a的中心位于相邻两个第二条形槽212b的中心。这样，将基本阵列单元150进行矩形阵列之后，在宽度方向相邻的任意两个第二条形槽21 2沿长度方向相互错位分布。
图10A和图10B是本申请实施例示出的第一条形槽与第二条形槽的截面剖视图。其中，图10A例如可以是第一条形槽与第二条形槽的第一槽段的截面剖视图，图10B例如可以是第一条形槽与第二条形槽的第二槽段的截面剖视图。如图10A和图10B所示，在支撑板的设置有第一条形槽211与第二条形槽212的区域，第一条形槽211在支撑板100的厚度方向具有一定的深度D1，第二条形槽212在支撑板100的厚度方向具有一定的深度D2，且第一条形槽211的深度D1与第二条形槽212的深度D2之和等于支撑板100的厚度H。这样，在同时设置有第一条形槽211和第二条形槽212的区域，第一条形槽211与位于其投影上的第二条形槽212将支撑板100贯穿，形成通槽。
进一步如图10B所示，在一种实现方式中，第二条形槽212的第二槽段320的宽度B2优选大于第一条形槽211的宽度B1。这样，第二条形槽212两端可以形成更大半径的圆角结构，能够降低第二条形槽212两端与第一条形槽211相交处的应力集中。
进一步如图10A所示，在一种实现方式中，考虑到第二条形槽212在第一槽段310不涉及应力集中的问题，因此，第二条形槽212的第一槽段310的宽度B1优选等于第一条形槽211宽度B1。这样，第一条形槽211与第二条形槽212的第一槽段310整体上可以形成等宽的通槽，结构整体性更好，能够提高应力分布的均匀性。
图11是本申请实施例示出的第一条形槽与连接结构的截面剖视图。如图11所示，在设置有连接结构213的区域(即沿轴心线L方向相邻的两个第二条形槽212之间的区域)，第一条形槽211在支撑板100的厚度方向具有一定的深度D1，支撑板100除去第一条形槽211的剩余部分即为连接结构213，因此连接结构213的厚度H2与第二条形槽的深度D2相同。在支撑板100被第一条形槽211和第二条形槽212贯穿而形成通槽的情况下，连接结构213保持了支撑板100的结构连续性，提高了支撑板100的结构强度。
在一种实现方式中，连接结构213的厚度H2(即第二条形槽212的深度D2)优选大于第一条形槽211的深度D1，这样，连接结构213能够实现相对较大的厚度，以提高支撑板100的整体强度。
示例性的，连接结构213的厚度H2优选可以大于支撑板100厚度H的五分之四，第一条形槽211的深度D1相应地小于支撑板100厚度H的五分之一。这样，支撑板100在弯折区通过较小深度的第一条形槽211实现弯曲时的应力均匀分布，又同时通过较大厚度的连接结构213保证了支撑板100的结构连续性，既实现了消除显示屏模印的效果，又尽可能地提高了支撑板100的结构强度。
进一步如图10A、图10B、图11所示，在一种实现方式中，第一条形槽211和第二条形槽212内还填充有柔性介质130(图10A、图10B、图11仅在部分第一条形槽211和第二条形槽212内示出了柔性介质130，其余未示出柔性介质130的第一条形槽211和第二条形槽212也填充有柔性介质130)，柔性介质130填充后与支撑板100未开槽的区域位于同一平面内，提高支撑板100的平整度，同样具有改善模印的作用。
在一种实现方式中，柔性介质130例如可以是液体硅胶(liquid silicone rubber，LS R)。液体硅胶可以通过液体硅胶注塑成型工艺(liquid injection molding system，LIMS)注塑到第一条形槽211和第二条形槽212内，使得液体硅胶与支撑板100的主体形成一体结构。
下面对本申请实施例涉及的液体硅胶的注塑成型工艺进行示例性说明。一般来说， 液体硅胶为双组份胶，包括A胶和B胶，A胶和B胶常温下为液体，混合后加热到一定温度能迅速固化。在注塑之前，首先执行混料流程，也就是将A胶和B胶混合；然后，将混合后的液体硅胶注入到第一条形槽211和第二条形槽212内，从而填满整个通槽；最后，对已注入的液体硅胶进行加热加压使其固化，固化后的液体硅胶将与支撑板100的主体结构成为一体，液体硅胶与支撑板100的板面位于同一平面内。
本申请实施例还提供了一种显示屏。该显示屏包括本申请实施例的各实现方式提供的支撑板、显示面板和盖板，因此该显示屏不会产生模印和裂纹观感，具备良好的显示性能。
本申请实施例还提供了一种电子设备，该电子设备例如可以是折叠屏设备、卷轴屏设备、或者任意一种显示屏可弯折的电子设备。该电子设备可以包括一个或者显示屏，其中，至少一个显示屏为本申请实施例提供的显示屏，或者至少一个显示屏包含本申请实施例提供的支撑板。例如，该电子设备可以是内折叠屏设备，该内折叠屏设备可以包括一个内屏和一个外屏，其中，内屏指的是在机身折叠状态下隐藏的显示屏，外屏指的是在机身任何状态下都外露的显示屏，该内屏为本申请实施例提供的显示屏。
容易理解的是，本领域技术人员在本申请提供的几个实施例的基础上，可以对本申请的实施例进行结合、拆分、重组等得到其他实施例，这些实施例均没有超出本申请的保护范围。
以上的具体实施方式，对本申请的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上仅为本申请的具体实施方式而已，并不用于限定本申请的保护范围，凡在本申请的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本申请的保护范围之内。

Claims (12)

  1. 一种支撑板，其特征在于，包括：第一板面和第二板面；
    所述第一板面和所述第二板面背对背设置，所述第一板面用于与显示面板贴合；
    所述支撑板包括弯折区，所述支撑板用于在所述弯折区沿预设的轴心线L产生弯折；
    所述弯折区设置有镂空结构，所述镂空结构包括多个通槽，多个所述通槽沿着垂直于所述轴心线L的方向阵列分布；
    每个所述通槽包括1个第一条形槽和N个第二条形槽，N为大于1的正整数，其中：
    所述第一条形槽和所述第二条形槽均与所述轴心线L平行设置；所述第一条形槽设置于所述第一板面，向所述第二板面方向形成一定深度，所述第一条形槽沿着所述轴心线L方向连续且贯穿所述第一板面；所述第二条形槽设置于所述第二板面，向所述第一板面方向形成至所述第一条形槽底部，与所述第一条形槽连通；所述第二条形槽的长度小于所述支撑板沿所述轴心线L方向上的宽度，N个所述第二条形槽沿着所述轴心线L方向间隔阵列分布。
  2. 根据权利要求1所述的支撑板，其特征在于，
    N个所述第二条形槽的中心线与所述第一条形槽的中心线在所述支撑板厚度方向的投影重合。
  3. 根据权利要求1或2所述的支撑板，其特征在于，所述第二条形槽的深度大于所述第一条形槽的深度。
  4. 根据权利要求1-3任一项所述的支撑板，其特征在于，所述第一条形槽为等宽结构。
  5. 根据权利要求1-4任一项所述的支撑板，其特征在于，所述第二条形槽包括第一槽段以及位于所述第一槽段两端的第二槽段，所述第二槽段的宽度大于所述第一槽段的宽度。
  6. 根据权利要求5所述的支撑板，其特征在于，所述第二槽段的宽度大于所述第一条形槽的宽度，所述第一槽段的宽度与所述第一条形槽的宽度相同。
  7. 根据权利要求1-6任一项所述的支撑板，其特征在于，所述第二条形槽的两端为圆角结构。
  8. 根据权利要求1-7任一项所述的支撑板，其特征在于，所述通槽内填充有柔性介质，所述柔性介质在所述第一条形槽形成第一填充平面，在所述第二条形槽形成第二填充平面，所述第一填充平面与所述第一板面位于同一平面内，所述第二填充平面与所述第二板面位于同一平面内。
  9. 根据权利要求8所述的支撑板，其特征在于，所述柔性介质为液体硅胶。
  10. 根据权利要求1-9任一项所述的支撑板，其特征在于，所述支撑板的材质包括以下任意一种：TA4钛合金、不锈钢、聚乙烯醇高模纤维PVA。
  11. 一种显示屏，其特征在于，包括：
    盖板、显示面板和权利要求1-10任一项所述的支撑板；
    所述显示面板通过光学胶贴合于所述支撑板的所述第一板面；
    所述盖板通过光学胶贴合在所述显示面板的背对所述支撑板的一面。
  12. 一种电子设备，其特征在于，包括一个或者多个显示屏，其中，至少一个显示屏为权利要求11所述的显示屏。
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