WO2023000399A1 - 支撑组件及柔性显示模组 - Google Patents

支撑组件及柔性显示模组 Download PDF

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Publication number
WO2023000399A1
WO2023000399A1 PCT/CN2021/111401 CN2021111401W WO2023000399A1 WO 2023000399 A1 WO2023000399 A1 WO 2023000399A1 CN 2021111401 W CN2021111401 W CN 2021111401W WO 2023000399 A1 WO2023000399 A1 WO 2023000399A1
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WO
WIPO (PCT)
Prior art keywords
hollow
support
support assembly
width
bending
Prior art date
Application number
PCT/CN2021/111401
Other languages
English (en)
French (fr)
Inventor
汪文强
Original Assignee
武汉华星光电半导体显示技术有限公司
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Filing date
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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 US17/598,309 priority Critical patent/US12207420B2/en
Publication of WO2023000399A1 publication Critical patent/WO2023000399A1/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
    • 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
    • G09F9/33—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 being semiconductor devices, e.g. diodes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

Definitions

  • the present application relates to the field of display technology, in particular to a support component and a flexible display module.
  • Organic Light Emitting Diodes Organic Light Emitted Diode (OLED) module stacking structure is formed by stacking and laminating multi-layer film layers and adhesive layers.
  • OLED Organic Light Emitted Diode
  • a thin stainless steel plate SUS: a stainless steel code name
  • SUS stainless steel code name
  • the modulus of the support layer is significantly different from that of the film layer and the adhesive layer, usually 100 to 1000 times apart, the peeling between the film layers often occurs during the bending process due to uncoordinated force deformation. Phenomenon.
  • the bending area of the entire support layer is usually made into a grid shape, that is, a patterned structure. Compared with the entire support layer, this solution effectively solves the Peeling phenomenon and reduces the The bending stiffness of the support layer in the bending area of the module improves the overall bending performance of the module.
  • the embodiment of the present application provides a support assembly and a flexible display module to solve the technical problem that water vapor easily invades the film layer and the adhesive layer from the side hole position of the edge substructure of the existing support layer and affects the service life of the module.
  • the present application provides a support assembly for supporting a flexible display panel, the support assembly includes a support layer, and the support layer includes at least one bending area and non-bending areas located on both sides of the bending area;
  • the support layer has a patterned structure in the bending area, the patterned structure includes two first edges perpendicular to the bending axis of the bending area, and the patterned structure includes two The first hollow pattern at the first edge, the first hollow pattern includes a plurality of support blocks and a plurality of first hollow parts, and the plurality of support blocks are arranged in a direction perpendicular to the bending axis , each of the first hollow parts is located between two adjacent support blocks, and each of the first hollow parts forms a gap near the corresponding first edge, when the support layer is bent In the folded state, the gap shrinks to the closed state.
  • the width of the first hollow portion in a direction perpendicular to the bending axis gradually decreases.
  • the width of the first hollow portion in a direction perpendicular to the bending axis decreases linearly.
  • the first hollow part includes a first sub-hollowout part and a second sub-hollowout part arranged in a direction parallel to the bending axis and communicating with each other, and the first sub-hollowout part is away from Corresponding to the first edge, the second sub-hollowout is close to the corresponding first edge;
  • the width of the first sub-hollowout in the direction perpendicular to the bending axis is the first width
  • the second sub-hollowout is at the bend
  • the width in the direction on the folding axis is the second width; wherein, the first width is greater than or equal to the second width, and the first width decreases gradually, while the second width remains unchanged.
  • the first hollow part is a symmetrical pattern, and the axis of symmetry of the first hollow part is parallel to the bending axis.
  • the width of the first hollow part at the corresponding first edge and in a direction perpendicular to the bending axis is less than or equal to 60 microns.
  • the width of the first hollow part at the corresponding first edge and in a direction perpendicular to the bending axis is between 20 microns and 60 microns.
  • the non-bending area includes two second edges perpendicular to the bending axis, and a gap.
  • the width of the gap in a direction parallel to the bending axis is less than or equal to 0.75 mm.
  • the gap is filled with an adhesive layer with low moisture permeability and low modulus.
  • the patterned structure further includes a second hollow pattern, and two ends of the second hollow pattern are respectively connected to one of the first hollow patterns.
  • the second hollow pattern includes a plurality of sub-hollow patterns repeatedly arranged along the bending axis.
  • each of the sub-hollowout patterns includes a main body and a plurality of second hollowouts, and the second hollowouts in the sub-hollowout patterns connected to the first hollowout patterns are corresponding to The first hollow parts in the first hollow pattern are connected in one-to-one correspondence, and the second hollow parts in two adjacent sub-hollow patterns are connected in one-to-one correspondence.
  • the length of the second hollow part in a direction parallel to the bending axis, is greater than or equal to the length of the first hollow part, and the length of the second hollow part is less than Or equal to 1.2 times the length of the first hollow part; in a direction perpendicular to the bending axis, the maximum width of the first hollow part is not greater than the width of the second hollow part.
  • the width of the second hollow portion in a direction perpendicular to the bending axis is between 180 microns and 220 microns.
  • each sub-hollowout pattern further includes a plurality of third hollowouts
  • the third hollow parts and the second hollow parts in each of the sub-hollowout patterns are arranged alternately, and each of the third hollow parts corresponds to two intervals The second hollow part.
  • the hollow parts of the first hollow pattern and the second hollow pattern are filled with an adhesive layer with low moisture permeability and low modulus.
  • the support assembly further includes a protective film, the protective film is arranged on the side of the support layer away from the flexible display panel, and the protective film at least covers the support layer corresponding to the part of the bending zone.
  • the support assembly further includes a reinforcement layer, and the reinforcement layer is disposed on a side of the protective film away from the support layer.
  • the application provides a flexible display module, which includes:
  • the support assembly is located on one side of the flexible display panel, and is used to support the flexible display panel, the support assembly includes a support layer, the support layer includes at least one bending area and is located at the bending area non-bend zone on both sides of the zone;
  • the support layer has a patterned structure in the bending area, the patterned structure includes two first edges perpendicular to the bending axis of the bending area, and the patterned structure includes two The first hollow pattern at the first edge, the first hollow pattern includes a plurality of support blocks and a plurality of first hollow parts, and the plurality of support blocks are arranged in a direction perpendicular to the bending axis , each of the first hollow parts is located between two adjacent support blocks, and each of the first hollow parts forms a gap near the corresponding first edge, when the support layer is bent In the folded state, the gap shrinks to the closed state.
  • the support assembly and the flexible display module provided by the application includes a support layer, and the support layer has a patterned structure in the bending area, and the patterned structure includes two bends perpendicular to the bending area.
  • the first edge of the folding axis, the patterned structure includes two first hollow patterns respectively arranged at the first edge, the first hollow pattern includes a plurality of support blocks and a plurality of first hollow parts, and the plurality of support blocks are along the Arranged in a direction perpendicular to the bending axis, each first hollow part is located between two adjacent support blocks, and each first hollow part forms a gap near the adjacent first edge, when supporting When the layer is in the bent state, the gap shrinks to the closed state, which is beneficial to reduce the probability of water vapor and dust intruding into the flexible display module when the flexible display module is in the bent state, and improves the display life of the flexible display module.
  • Fig. 1 is a schematic plan view of a support layer provided by an embodiment of the present application
  • Fig. 2 is a schematic diagram of the first partial enlarged structure of the support layer in Fig. 1;
  • Fig. 3 is a schematic structural view of a support assembly provided in an embodiment of the present application in a bent state
  • Fig. 4 is a schematic structural diagram of a first hollow part and a second hollow part provided by an embodiment of the present application;
  • Fig. 5 is a schematic structural diagram of a support assembly provided by an embodiment of the present application.
  • Fig. 6 is a partial enlarged structural schematic diagram of the support assembly in Fig. 5;
  • Fig. 7 is the corresponding relationship diagram of W value, Z value and edge stress value provided by the embodiment of the present application.
  • Fig. 8 is a schematic diagram of a second partially enlarged structure of the support layer in Fig. 1;
  • Fig. 9 is a schematic structural diagram of a third hollow part provided by an embodiment of the present application.
  • Fig. 10 is a schematic cross-sectional structure diagram of a flexible display module provided by an embodiment of the present application.
  • Support component 1. Support layer; 1a, bending area; 1b, non-bending area; 2. Adhesive layer; 3. Protective film; 4. Reinforcing layer;
  • the second hollow pattern; 20a the sub-hollow pattern; 201, the main body; 202, the second hollow; 2021, the first arc hollow; 2022, the first strip hollow; 203, the third hollow; 2031, the second arc-shaped hollow part, 2032, the third arc-shaped hollow part; 2033, the second bar-shaped hollow part;
  • a flexible display panel 200.
  • a flexible display panel 200.
  • FIG. 1 is a schematic plan view of a support layer provided in an embodiment of the present application
  • FIG. 5 is a schematic view of a structure of a support assembly provided in an embodiment of the present application.
  • the embodiment of the present application provides a support assembly 100 for supporting a flexible display panel.
  • the support assembly 100 includes a support layer 1, and the support layer 1 includes at least one bending area 1a and two sides of the bending area 1a.
  • the support layer 1 has a patterned structure in the bending area 1a, that is, the support layer 1 adopts a design combining solid parts and hollow parts to disperse the impact on the support layer 1 during the bending process. stress and improve ductility.
  • the embodiment of the present application takes the support layer 1 having one bending area 1a and two non-bending areas 1b as an example for illustration, but it should be understood that the number of bending areas 1a also There may be 2 or more, and correspondingly, the number of the non-bending regions 1b is 3 or more.
  • the two non-bending regions 1b are symmetrically connected to opposite sides of the bending region 1a, and the two non-bending regions 1b have the same shape and size.
  • FIG. 2 is a schematic diagram of a first partially enlarged structure of the supporting layer in FIG. 1 .
  • the patterned structure includes two first edges 12 perpendicular to the bending axis 11 of the bending region 1a, and the patterned structure includes two first edges 12 respectively arranged at the corresponding first edges 12.
  • Hollow pattern10 The first hollow pattern 10 includes a plurality of support blocks 101 and a plurality of first hollow parts 102, the plurality of support blocks 101 are arranged along a direction perpendicular to the bending axis 11, each of the first hollows
  • the portion 102 is located between two adjacent support blocks 101 , and each first hollow portion 102 forms a notch 1021 near the adjacent first edge 12 .
  • FIG. 3 is a schematic structural diagram of a support assembly provided in an embodiment of the present application in a bent state.
  • the gap 1021 shrinks to a closed state.
  • the gap 1021 shrinks to a closed state means that when the supporting layer 1 is in a bent state, the gap 1021 just closes or tend to close. Specifically, in one case, when the notch 1021 is just closed, the opposite surfaces of two adjacent support blocks 101 just touch; in another case, when the notch 1021 tends to close, The opposite surfaces of two adjacent support blocks 101 are infinitely close to but not abutted against. At this time, the first hollow part 102 is at the corresponding first edge 12 and perpendicular to the bending axis 11. The width of the direction is small enough, but not 0.
  • the present application adopts the above-mentioned design to achieve the purpose of reducing the probability of water vapor and dust in the external environment invading into the flexible display module under the premise of ensuring that the supporting layer 1 maintains good ductility.
  • the flexible display module using the support layer 1 provided by the embodiment of the present application is more likely to be dust-proof.
  • the width of the first hollow portion 102 in a direction perpendicular to the bending axis 11 gradually decreases. It can be understood that the smaller the width of the first hollow portion 102 near the adjacent first edge 12 is, the lower the probability of water vapor intrusion.
  • the width of the first hollow portion 102 gradually decreases in the direction perpendicular to the bending axis 11, on the one hand, the probability of water vapor and dust intruding into the flexible display module can be reduced, thereby To achieve the purpose of protecting the display module; on the other hand, the first hollow part 102 has a transitional scaling design, which can balance the force on the flexible display module when it is bent, thereby avoiding the situation of stress concentration and fracture failure occur.
  • the width of the first hollow portion 102 decreases linearly in a direction perpendicular to the bending axis 11 . It can be understood that the width of the first hollow part 102 in the direction perpendicular to the bending axis 11 has a uniform decreasing trend, which is beneficial to further balance the force of the flexible display module when it is bent, so that it can Avoid the occurrence of fracture failure due to stress concentration.
  • FIG. 4 is a schematic structural diagram of a first hollow part and a second hollow part provided by an embodiment of the present application.
  • the first hollow part 102 includes a first sub-hollowout part 1022 and a second sub-hollowout part 1023 arranged in a direction parallel to the bending axis 11 and communicating with each other.
  • the first sub-hollowout part 1022 is far away from the corresponding the first edge 12, the second sub-hollowout portion 1023 is close to the corresponding first edge 12.
  • the width of the first sub-hollowout 1022 in the direction perpendicular to the bending axis 11 gradually decreases, and the second sub-hollowout
  • the width of 1023 in the direction perpendicular to the bending axis 11 is constant.
  • the first sub-hollowout 1022 is a retracted structure
  • the second sub-hollowout 1023 is a horizontal structure. Due to the setting of the second sub-hollowout 1023, water vapor and dust need to pass through a long and narrow section. Only the channel can enter the first sub-hollow part 1022, which increases the difficulty for external water vapor and dust to enter the flexible display module, thereby helping to further reduce the probability of water vapor and dust intruding into the flexible display module.
  • the width of the first sub-hollowout 1022 in the direction perpendicular to the bending axis 11 is the first width
  • the width of the second sub-hollowout portion 1023 in the direction of the bending axis 11 is the second width; wherein, the first width is greater than or equal to the second width, and the first width gradually decreases , the second width remains unchanged.
  • the first hollow part 102 is a symmetrical pattern, and the axis of symmetry of the first hollow part 102 is parallel to the bending axis 11. That is to say, in any embodiment of the present application, any position, the decreasing trend of the width of the first hollow part 102 in the direction perpendicular to the bending axis 11 remains the same, which is beneficial to further make the first hollow part 102 be subjected to pressure when the support layer 1 is bent The force is kept symmetrical, so as to further balance the force on the flexible display module when it is bent, and avoid the occurrence of fracture and failure due to stress concentration.
  • the width Z of the first hollow part 102 at the corresponding first edge 12 and in the direction perpendicular to the bending axis 11 is less than or equal to 60 microns, which can avoid the If the value is too large, the opposing surfaces of two adjacent support blocks 101 will press against and interfere with each other, thereby avoiding defects such as extrusion and arching.
  • the width Z of the first hollow portion 102 at the corresponding first edge 12 and in a direction perpendicular to the bending axis 11 is between 20 micrometers and 60 micrometers. On the one hand, it can avoid the possibility of water vapor and dust intruding into the flexible display module under high temperature and high humidity conditions due to too small Z value; on the other hand, because the edge stress of the flexible display module increases with the Z value It shows a trend of decreasing first and then increasing. Designing the Z value within this range can reduce the edge stress of the flexible display module.
  • the first hollow part 102 can be formed by dry etching process, or can be formed by laser process.
  • the width Z of the first hollow part 102 at the corresponding first edge 12 and in the direction perpendicular to the bending axis 11 is 20 microns, which is actually achievable in the current etching process. It is determined under the limit precision and can meet the processing precision of the current stage of the process.
  • the non-bending region 1b includes two second edges 13 perpendicular to the bending axis 11, the first edge 12 and the A gap 14 is provided between the second edges 13 .
  • the gap 14 between the bending area 1a and the non-bending area 1b of the support layer 1 fingers or installation tools are not easy to touch the first edge during subsequent installation. 12, thereby reducing the probability of warping of the first edge 12 of the support layer 1, which is conducive to improving the yield rate and meeting the drop requirements of the whole machine.
  • the width B of the gap 14 in the direction parallel to the bending axis 11 is less than or equal to 0.75 mm, without changing
  • enough space can be reserved for filling the adhesive layer, so as to protect the first edge 12 from being damaged by external force.
  • FIG. 5 is a schematic structural diagram of a support assembly provided in an embodiment of the present application
  • FIG. 6 is a partially enlarged structural schematic diagram of the support assembly in FIG. 5 .
  • the gap 14 is filled with an adhesive layer 2 with low moisture permeability and low modulus.
  • the adhesive layer 2 acts as a buffer and can protect the first edge 12 from damage; 12. It is packaged and sealed to achieve reliable water vapor barrier and good protection.
  • the adhesive layer 2 is made of a material with low moisture permeability and oxygen permeability and low elastic modulus.
  • the elastic modulus E of the adhesive layer 2 is between 0.05 MPa (megapascal) and 0.2 MPa.
  • the adhesive layer 2 may be a silicon-based grease viscous oil film or a lithium-based grease oil film.
  • the length L2 of the second hollow part 202 is greater than or equal to the length L1 of the first hollow part 102 , And the length L2 of the second hollow portion 202 is less than or equal to 1.2 times the length L1 of the first hollow portion 102 .
  • the length of the first hollow part 102 should not be too long, so as to reduce the processing difficulty of the narrow first sub-hollow part 1022;
  • the first edge 12 has good ductility, the probability of water vapor and dust in the external environment intruding into the flexible display module is reduced; in the direction perpendicular to the bending axis 11, the first edge
  • the maximum width of a hollow part 102 is not greater than the width of the second hollow part 202 , so that the first hollow part 102 is in a retracted state as a whole compared with the second hollow part 202 .
  • the length L1 of the first hollow portion 102 is 2 micrometers.
  • the maximum width of the first hollow portion 102 is not greater than the width of the second hollow portion 202 .
  • the width W of the second hollow portion 202 in a direction perpendicular to the bending axis 11 is between 180 ⁇ m and 220 ⁇ m.
  • the edge stress tends to increase with the increase of the W value, and designing the W value to this range can reduce the edge stress of the flexible display module.
  • the second hollow part 202 includes a first arc-shaped hollow part 2021 and a first bar-shaped hollow part 2022 arranged in sequence along a direction parallel to the bending axis 11 and communicating with each other.
  • the first strip-shaped hollow portion 2022 is arranged between the first arc-shaped hollow portion 2021 and the first hollow portion 102, the shape of the first arc-shaped hollow portion 2021 is semi-elliptical, and the first strip
  • the shape of the hollow part 2022 is a rectangle.
  • the second hollow portion 202 may also be in other shapes, which is not limited in this embodiment of the present application.
  • the geometric dimension relationship between the first hollow part 102 and the second hollow part 202 includes that the first hollow part 102 is at the corresponding first edge 12 and perpendicular to the bend.
  • the width Z in the direction of the bending axis 11, the width B of the gap 14 in the direction parallel to the bending axis 11, and the width B of the second hollow part 202 in the direction perpendicular to the bending axis 11 The width W, to a certain extent, will affect the force on the edge of the support layer 1 and the shape change, therefore, the appropriate range for determining the geometric dimensions of the first hollow part 102 and the second hollow part 202 is very necessary.
  • the determination of the Z value range is also related to the value of the width W of the second hollow part 202 in the direction perpendicular to the bending axis 11. If the Z value does not match the W value, the support layer 1 The force in the flattened state is completely different from that in the bent state.
  • the determination of the Z value range is also limited by the accuracy of the actual process. For example, it is limited by the processing accuracy of the etching process at the current stage. The smaller the Z value, the lower the process yield, or even unprocessable.
  • the applicant analyzed through simulation to optimize the combined size, taking the force on the edge of the flexible display module as a reference, and simulated the flexible display module by changing the W value and the Z value. When the force on the edge of the flexible display module is the smallest, determine the optimal W value and Z value.
  • FIG. 7 is a graph showing the correspondence relationship between the W value, the Z value and the edge stress value provided by the embodiment of the present application.
  • the simulation results show that the larger the value of W, the corresponding edge stress of the flexible display module gradually increases correspondingly, that is, the smaller W is, the more beneficial it is to alleviate the edge stress of the flexible display module.
  • the edge stress of the flexible display module decreases first and then increases with the Z value. When the Z value is 40 microns, the edge stress of the flexible display module can reach an optimal value.
  • the support layer 1 in order to more evenly disperse the stress on the support layer 1 during the bending process, the support layer 1 has better
  • the bending area 1a of the support layer 1 is also provided with a second hollow pattern 20, and the second hollow pattern 20 is provided in the middle area of the bending area 1a , so as to improve the ductility of the flexible display module using the support assembly 100 as a whole, so as to ensure the deformation adaptability and coordination between the support layer 1 and the functional film layer of the flexible display module, thereby improving
  • the bending performance of the flexible display module is improved, the risk of debonding and fracture between the film layers is reduced, the bending service life of the flexible display module is improved, and the production yield of the product is improved.
  • FIG. 8 is a schematic diagram of a second partial enlarged structure of the supporting layer in FIG. 1 .
  • Both ends of the second hollow pattern 20 are respectively connected to one of the first hollow patterns 10, the second hollow pattern 20 includes a plurality of sub-hollow patterns 20a arranged repeatedly, each of the sub-hollow patterns 20a includes a main body part 201 and a plurality of second hollowed out parts 202, wherein the second hollowed out part 202 in the sub-hollowed out pattern 20a connected with the first hollowed out pattern 10 is the same as all the corresponding ones in the first hollowed out pattern 10
  • the first hollow parts 102 are connected in one-to-one correspondence.
  • the second hollowed-out parts 202 in two adjacent sub-hollowed-out patterns 20a are connected in one-to-one correspondence.
  • the second hollow part is 202a
  • the second hollow part in the sub-hollow pattern 20a on the right side is 202b as an example for explanation.
  • the second hollow part 202a is not closed toward the side of the second hollow part 202b
  • the second hollow part 202b is not closed toward the side of the second hollow part 202a.
  • the side of the second hollow part 202a facing the second hollow part 202b communicates with the side of the second hollow part 202b facing the second hollow part 202a.
  • each of the sub-hollowout patterns 20a further includes a plurality of third hollowouts 203 .
  • the third hollowed out parts 203 and the second hollowed out parts 202 in each of the sub-hollowed out patterns 20a are arranged alternately, and each of the third hollowed out parts 203 corresponds to the second hollow part 202 at two intervals.
  • FIG. 9 is a schematic structural diagram of a third hollow part provided in an embodiment of the present application.
  • the third hollow part 203 includes a second arc-shaped hollow part 2031 and a third arc-shaped hollow part 2032 respectively arranged at both ends, and a second arc-shaped hollow part 2031 and a third arc-shaped hollow part
  • the second bar-shaped hollow part 2033 between 2032, the shape and size of the second arc-shaped hollow part 2031 and the third arc-shaped hollow part 2032 are the same as that of the first arc-shaped hollow part 2021.
  • the width of the second strip-shaped hollow portion 2033 is equal to the width of the first strip-shaped hollow portion 2022 .
  • the hollow parts of the first hollow pattern 10 and the second hollow pattern 20 are filled with an adhesive layer 2 with low moisture permeability and low modulus.
  • first hollow part 102, the second hollow part 202 and the third hollow part 203 are also filled with the adhesive layer 2 with low moisture permeability and low modulus performance.
  • the adhesive layer 2 is smoothed.
  • the glue layer 2 can be filled in the second hollow part 202 and the third hollow part 203 by coating.
  • the material of the adhesive layer 2 filled in the second hollow portion 202 and the third hollow portion 203 may be the same as the material of the adhesive layer 2 filled in the gap 14 .
  • the support assembly 100 further includes a protective film 3, the protective film 3 is disposed on the side of the support layer 1 away from the flexible display panel, so The protective film 3 at least covers the part of the support layer 1 corresponding to the bending area 1a.
  • the material of the protective film 3 can be selected from materials with good wear resistance, oil resistance and corrosion resistance. Under the condition of high temperature of 120°C, the protective film 3 does not shrink and has good elasticity.
  • the material of the protective film 3 may be thermoplastic polyurethane elastic colloidal material, but it is not limited thereto.
  • the support assembly 100 further includes a reinforcement layer 4 , and the reinforcement layer 4 is disposed on a side of the protection film 3 away from the support layer 1 .
  • the reinforcement layer 4 can be coated with a low moisture permeability and low modulus adhesive layer on the side of the protective film 3 away from the support layer 1 to perform secondary sealing treatment on the support layer 1 to reduce the The way for water vapor to intrude into the flexible display module is eliminated, thereby further reducing the probability of water vapor intruding into the flexible display module.
  • the material of the reinforcing layer 4 can be mixed with the glue layer 2 filled in the first hollow part 102 , the second hollow part 202 , the third hollow part 203 and the gap 14 of the same material.
  • the relevant data provided in the embodiments of the present application have been applied in actual production, and have been subjected to finite element simulation analysis technology and the simulation cloud diagram of the bending force of the support layer 1 .
  • the support layer 1 adopts a patterned structure design, and it is known through simulation verification that the support layer 1
  • the maximum stress received is 526.9MPa
  • the stress value is within the range of its fatigue strength, and is far below the strength limit value of its material selection strength of 1600MPa, which shows that this design method will not affect the stress of the flexible display module state.
  • simulation results can prove that it can effectively reduce the probability of water vapor and dust entering the interior of the flexible display module through the gap 1021 under high temperature and high humidity conditions, which is beneficial to improve the life of the flexible display module.
  • FIG. 10 is a schematic cross-sectional structure diagram of a flexible display module provided by an embodiment of the present application.
  • the flexible display module provided by the embodiment of the present application includes a flexible display panel 200 and the support assembly 100 in the above-mentioned embodiments, wherein the support assembly 100 is located on one side of the flexible display panel 200 for supporting the A flexible display panel 200.
  • the support assembly and the flexible display module provided by the present application
  • the support assembly includes a support layer
  • the support layer has a patterned structure in the bending area
  • the patterned structure includes two bending axes perpendicular to the bending area.
  • the first edge, the patterned structure includes two first hollow patterns respectively arranged at the first edge, the first hollow pattern includes a plurality of support blocks and a plurality of first hollow parts, and the plurality of support blocks are perpendicular to the bend Arranged in the direction of the folding axis, each first hollow portion is located between two adjacent support blocks, and each first hollow portion forms a gap near the adjacent first edge, when the support layer is in a bent state,
  • the shrinkage of the notch to the closed state is beneficial to reduce the probability of water vapor and dust intruding into the interior of the flexible display module when the flexible display module is in the bent state, and improves the display life of the flexible display module.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
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  • Microelectronics & Electronic Packaging (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种支撑组件（100）及柔性显示模组，支撑组件（100）包括支撑层（1），支撑层（1）在弯折区（1a）内呈图案化结构，图案化结构包括两个第一镂空图案（10），第一镂空图案（10）包括多个支撑块（101）和多个第一镂空部（102），每一第一镂空部（102）靠近邻近的第一边缘（12）处形成一缺口（1021），当处于弯折状态时，缺口（1021）收缩至闭合状态，有利于降低水汽和灰尘入侵到柔性显示模组内部的机率。

Description

支撑组件及柔性显示模组 技术领域
本申请涉及显示技术领域，尤其涉及一种支撑组件及柔性显示模组。
 背景技术
有机发光二极管（Organic Light Emitted Diode，OLED）模组叠构是由多层膜层和胶层层叠贴合而成。一般而言，为保证模组的整体平整性，与OLED模组叠构相邻的最底下一层材料通常采用较薄的不锈钢板(SUS：一种不锈钢代号)作为支撑层。然而，由于支撑层的模量与膜层、胶层差异性明显，通常相隔100～1000倍，故在弯折过程中因受力变形不协调，常常出现膜层之间的脱粘(Peeling)现象。为改善这一失效现象，通常将整面支撑层的弯折区制作成网格形，即带图案(Pattern)的结构形式，这一方案相比整面支撑层有效解决了Peeling现象，降低了模组弯折区内的支撑层的弯折刚度，提高了模组的整体弯折性能。
然而，在此种设计下，水汽容易从支撑层边缘子结构的侧面孔洞位置入侵到膜层和胶层，易导致膜层和胶层失效，极端环境条件下极易入侵到封装层内部，进而影响模组的使用寿命。
综上，亟需提供一种支撑组件及柔性显示模组，来解决上述技术问题。
 技术问题
本申请实施例提供一种支撑组件及柔性显示模组，以解决水汽容易从现有的支撑层边缘子结构的侧面孔洞位置入侵到膜层和胶层，影响模组的使用寿命的技术问题。
 技术解决方案
为解决上述问题，本申请提供的技术方案如下：
本申请提供一种支撑组件，用于支撑柔性显示面板，所述支撑组件包括支撑层，所述支撑层包括至少一弯折区和位于所述弯折区两侧的非弯折区；
所述支撑层在所述弯折区内呈图案化结构，所述图案化结构包括两个垂直于所述弯折区的弯折轴线的第一边缘，所述图案化结构包括两个分别设于所述第一边缘处的第一镂空图案，所述第一镂空图案包括多个支撑块和多个第一镂空部，多个所述支撑块沿垂直于所述弯折轴线的方向上排列，每一所述第一镂空部位于相邻两个所述支撑块之间，且每一所述第一镂空部靠近对应的所述第一边缘处形成一缺口，当所述支撑层处于弯折状态时，所述缺口收缩至闭合状态。
根据本申请提供的支撑组件，在沿靠近对应的所述第一边缘的方向上，所述第一镂空部在垂直于所述弯折轴线的方向上的宽度逐渐减小。
根据本申请提供的支撑组件，在沿靠近对应的所述第一边缘的方向上，所述第一镂空部在垂直于所述弯折轴线的方向上的宽度呈线性减小。
根据本申请提供的支撑组件，所述第一镂空部包括沿平行于所述弯折轴线的方向排列且相互连通的第一子镂空部和第二子镂空部，所述第一子镂空部远离对应的所述第一边缘，所述第二子镂空部靠近对应的所述第一边缘；
在沿靠近对应的所述第一边缘的方向上，所述第一子镂空部在垂直于所述弯折轴线的方向上的宽度为第一宽度，所述第二子镂空部在所述弯折轴线上的方向上的宽度为第二宽度；其中，所述第一宽度大于或等于所述第二宽度，且所述第一宽度逐渐减小，所述第二宽度不变。
根据本申请提供的支撑组件，所述第一镂空部为对称图案，所述第一镂空部的对称轴平行于所述弯折轴线。
根据本申请提供的支撑组件，所述第一镂空部在对应的所述第一边缘处且在垂直于所述弯折轴线的方向上的宽度小于或等于60微米。
根据本申请提供的支撑组件，所述第一镂空部在对应的所述第一边缘处且在垂直于所述弯折轴线的方向上的宽度介于20微米至60微米之间。
根据本申请提供的支撑组件，所述非弯折区包括两个垂直于所述弯折轴线的第二边缘，所述第一边缘和与之同侧设置的所述第二边缘之间设有间隙。
根据本申请提供的支撑组件，所述间隙在平行于所述弯折轴线的方向上的宽度小于或等于0.75毫米。
根据本申请提供的支撑组件，所述间隙内填充有具有低透湿低模量性能的胶层。
根据本申请提供的支撑组件，所述图案化结构还包括第二镂空图案，所述第二镂空图案的两端分别连接一个所述第一镂空图案。
根据本申请提供的支撑组件，所述第二镂空图案包括多个沿所述弯折轴线重复排列的子镂空图案。
根据本申请提供的支撑组件，每一所述子镂空图案包括主体部和多个第二镂空部，与所述第一镂空图案连接的所述子镂空图案中的所述第二镂空部与对应所述第一镂空图案中的所述第一镂空部一一对应连通，相邻两个所述子镂空图案中的所述第二镂空部一一对应连通。
根据本申请提供的支撑组件，在平行于所述弯折轴线的方向上，所述第二镂空部的长度大于或等于所述第一镂空部的长度，且所述第二镂空部的长度小于或等于所述第一镂空部的长度的1.2倍；在垂直于所述弯折轴线的方向上，所述第一镂空部的最大宽度不大于所述第二镂空部的宽度。
根据本申请提供的支撑组件，所述第二镂空部在垂直于所述弯折轴线的方向上的宽度介于180微米至220微米之间。
根据本申请提供的支撑组件，每一所述子镂空图案还包括多个第三镂空部；
在垂直于所述弯折轴线的方向上，每一所述子镂空图案中的所述第三镂空部和所述第二镂空部交替设置，且每一所述第三镂空部对应两个间隔的所述第二镂空部。
根据本申请提供的支撑组件，所述第一镂空图案和所述第二镂空图案的镂空部内填充有具有低透湿低模量性能的胶层。
根据本申请提供的支撑组件，所述支撑组件还包括保护膜，所述保护膜设置于所述支撑层远离所述柔性显示面板的一侧，所述保护膜至少覆盖所述支撑层对应所述弯折区的部分。
根据本申请提供的支撑组件，所述支撑组件还包括补强层，所述补强层设置于所述保护膜远离所述支撑层的一侧。
本申请提供一种柔性显示模组，所述柔性显示模组包括：
柔性显示面板；和
支撑组件，所述支撑组件位于所述柔性显示面板的一侧，用于支撑所述柔性显示面板，所述支撑组件包括支撑层，所述支撑层包括至少一弯折区和位于所述弯折区两侧的非弯折区；
所述支撑层在所述弯折区内呈图案化结构，所述图案化结构包括两个垂直于所述弯折区的弯折轴线的第一边缘，所述图案化结构包括两个分别设于所述第一边缘处的第一镂空图案，所述第一镂空图案包括多个支撑块和多个第一镂空部，多个所述支撑块沿垂直于所述弯折轴线的方向上排列，每一所述第一镂空部位于相邻两个所述支撑块之间，且每一所述第一镂空部靠近对应的所述第一边缘处形成一缺口，当所述支撑层处于弯折状态时，所述缺口收缩至闭合状态。
 有益效果
本申请的有益效果为：本申请提供的支撑组件及柔性显示模组，支撑组件包括支撑层，支撑层在弯折区内呈图案化结构，图案化结构包括两个垂直于弯折区的弯折轴线的第一边缘，图案化结构包括两个分别设于所述第一边缘处的第一镂空图案，第一镂空图案包括多个支撑块和多个第一镂空部，多个支撑块沿垂直于弯折轴线的方向上排列，每一第一镂空部位于相邻两个支撑块之间，且每一所述第一镂空部靠近邻近的所述第一边缘处形成一缺口，当支撑层处于弯折状态时，缺口收缩至闭合状态，有利于降低柔性显示模组在弯折状态下，水汽和灰尘入侵到柔性显示模组内部的机率，提高了柔性显示模组的显示寿命。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例提供的一种支撑层的平面结构示意图；
图2是图1中的支撑层的第一种局部放大结构示意图；
图3是本申请实施例提供的一种支撑组件在弯折状态时的结构示意图；
图4是本申请实施例提供的一种第一镂空部和第二镂空部的结构示意图；
图5是本申请实施例提供的一种支撑组件的结构示意图；
图6是图5中的支撑组件的局部放大结构示意图；
图7是本申请实施例提供的W值、Z值与边缘应力值的对应关系图；
图8是图1中的支撑层的第二种局部放大结构示意图；
图9是本申请实施例提供的一种第三镂空部的结构示意图；
图10是本申请实施例提供的一种柔性显示模组的截面结构示意图。
附图标记说明：
100、支撑组件；1、支撑层；1a、弯折区；1b、非弯折区；2、胶层；3、保护膜；4、补强层；
10、第一镂空图案；11、弯折轴线；12、第一边缘；13、第二边缘；14、间隙；101、支撑块；102、第一镂空部；1021、缺口；1022、第一子镂空部；1023、第二子镂空部；
20、第二镂空图案；20a、子镂空图案；201、主体部；202、第二镂空部；2021、第一弧形镂空部；2022、第一条形镂空部；203、第三镂空部；2031、第二弧形镂空部、2032、第三弧形镂空部；2033、第二条形镂空部；
200、柔性显示面板。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。此外，应当理解的是，此处所描述的具体实施方式仅用于说明和解释本申请，并不用于限制本申请。在本申请中，在未作相反说明的情况下，使用的方位词如“上”和“下”通常是指装置实际使用或工作状态下的上和下，具体为附图中的图面方向；而“内”和“外”则是针对装置的轮廓而言的。
请参阅图1和图5，图1是本申请实施例提供的一种支撑层的平面结构示意图；图5是本申请实施例提供的一种支撑组件的结构示意图。
本申请实施例提供一种支撑组件100，用于支撑柔性显示面板，所述支撑组件100包括支撑层1，所述支撑层1包括至少一弯折区1a和位于所述弯折区1a两侧的非弯折区1b。所述支撑层1在所述弯折区1a内呈图案化结构，即，所述支撑层1采用实体部分和镂空部分结合的设计，用以分散所述支撑层1在弯折过程中所受到的应力，提高延展性。
需要说明的是，本申请实施例以所述支撑层1具有一个弯折区1a和两个非弯折区1b为例进行阐述说明，但应理解的是，所述弯折区1a的数目也可以是2个或多个，对应地，所述非弯折区1b的数目为3个或多个。
具体地，两个所述非弯折区1b对称地连接于所述弯折区1a的相对两侧，两个所述非弯折区1b的形状和尺寸均相同。
请参阅图2，图2是图1中的支撑层的第一种局部放大结构示意图。所述图案化结构包括两个垂直于所述弯折区1a的弯折轴线11的第一边缘12，所述图案化结构包括两个分别设于对应的所述第一边缘12处的第一镂空图案10。所述第一镂空图案10包括多个支撑块101和多个第一镂空部102，多个所述支撑块101沿垂直于所述弯折轴线11的方向上排列，每一所述第一镂空部102位于相邻两个所述支撑块101之间，且每一所述第一镂空部102靠近邻近的所述第一边缘12处形成一缺口1021。
请结合图3，图3是本申请实施例提供的一种支撑组件在弯折状态时的结构示意图。当所述支撑层1处于弯折状态时，所述缺口1021收缩至闭合状态。
需要说明的是，“当所述支撑层1处于弯折状态时，所述缺口1021收缩至闭合状态”的意思是指，当所述支撑层1处于弯折状态时，所述缺口1021刚好闭合或趋于闭合。具体来说，一种情况下，当所述缺口1021刚好闭合时，相邻两个所述支撑块101的相对表面刚好触碰；另一种情况下，当所述缺口1021趋于闭合时，相邻两个所述支撑块101的相对表面无限靠近但未抵接，此时，所述第一镂空部102在对应的所述第一边缘12处且在垂直于所述弯折轴线11的方向的宽度足够小，但却不为0。
本申请通过采用上述设计，在保证所述支撑层1保持良好的延展性的前提下，来达到降低外界环境中的水汽和灰尘入侵到柔性显示模组内部的概率的目的。此外，对于内折式整机产品，由于柔性显示模组长期处于折叠状态，应用本申请实施例提供的所述支撑层1的柔性显示模组更易于防尘。
在一种实施例中，沿靠近对应的所述第一边缘12的方向上，所述第一镂空部102在垂直于所述弯折轴线11的方向上的宽度逐渐减小。可以理解的是，所述第一镂空部102在靠近邻近的所述第一边缘12处的宽度越小，水汽入侵的机率则越低。通过采用所述第一镂空部102在垂直于所述弯折轴线11的方向上的宽度逐渐减小的设计，一方面，能够使得水汽和灰尘入侵到柔性显示模组内部的概率降低，以此达到保护显示模组的目的；另一方面，所述第一镂空部102呈过渡缩放式设计，能够使得柔性显示模组在弯折时受力均衡，从而能够避免应力集中而发生断裂失效的情况发生。
在一种实施例中，在沿靠近对应的所述第一边缘12的方向上，所述第一镂空部102在垂直于所述弯折轴线11的方向上的宽度呈线性减小。可以理解的是，所述第一镂空部102在垂直于所述弯折轴线11的方向上的宽度呈均匀减小趋势，有利于进一步使得柔性显示模组在弯折时受力均衡，从而能够避免应力集中而发生断裂失效的情况发生。
在一种实施例中，请参阅图4，图4是本申请实施例提供的一种第一镂空部和第二镂空部的结构示意图。所述第一镂空部102包括沿平行于所述弯折轴线11的方向排列且相互连通的第一子镂空部1022和第二子镂空部1023，所述第一子镂空部1022远离对应的所述第一边缘12，所述第二子镂空部1023靠近对应的所述第一边缘12。其中，在沿靠近对应的所述第一边缘12的方向上，所述第一子镂空部1022在垂直于所述弯折轴线11的方向上的宽度逐渐减小，所述第二子镂空部1023在垂直于所述弯折轴线11的方向上的宽度不变。
可以理解的是，所述第一子镂空部1022为内缩式结构，所述第二子镂空部1023为水平结构，由于所述第二子镂空部1023的设置，水汽和灰尘需要经过一段狭长通道才能够进入所述第一子镂空部1022，提升了外界水汽和灰尘进入柔性显示模组的难度，从而有利于进一步降低水汽和灰尘入侵到柔性显示模组内部的概率。
在一种实施例中，在沿靠近对应的所述第一边缘12的方向上，所述第一子镂空部1022在垂直于所述弯折轴线11的方向上的宽度为第一宽度，所述第二子镂空部1023在所述弯折轴线11上的方向上的宽度为第二宽度；其中，所述第一宽度大于或等于所述第二宽度，且所述第一宽度逐渐减小，所述第二宽度不变。
在一种实施例中，所述第一镂空部102为对称图案，所述第一镂空部102的对称轴平行于所述弯折轴线11，也就是说，在本申请实施例中，在任意位置，所述第一镂空部102在垂直于所述弯折轴线11的方向上的宽度减小趋势保持相同，有利于进一步使得所述第一镂空部102在所述支撑层1弯折时受力保持对称，从而进一步使得柔性显示模组在弯折时受力均衡，能够避免应力集中而发生断裂失效的情况发生。
在一种实施例中，所述第一镂空部102在对应的所述第一边缘12处且在垂直于所述弯折轴线11的方向上的宽度Z小于或等于60微米，可避免由于Z值过大而导致相邻两个所述支撑块101的相对表面相互抵压发生干涉，从而避免产生挤压拱起等不良。
在一种实施例中，所述第一镂空部102在对应的所述第一边缘12处且在垂直于所述弯折轴线11的方向上的宽度Z介于20微米至60微米之间。一方面，可避免由于Z值过小而增大水汽和灰尘在高温高湿条件下入侵至柔性显示模组内部的概率；另一方面，由于柔性显示模组边缘应力随着Z值的增大呈先减小后增大的趋势，将Z值设计为此范围，可降低柔性显示模组边缘应力。
在一种实施例中，所述第一镂空部102可采用干蚀刻工艺加工成型，也可采用激光加工成型的方式制备而成。所述第一镂空部102在对应的所述第一边缘12处且在垂直于所述弯折轴线11的方向上的宽度Z为20微米，是在现阶段蚀刻加工成型的实际所能达到的极限精度下确定的，能够满足当前阶段工艺制程的加工精度。
在一种实施例中，请继续参阅图2，所述非弯折区1b包括两个垂直于所述弯折轴线11的第二边缘13，所述第一边缘12和与之同侧设置的所述第二边缘13之间设有间隙14。可以理解的是，在不影响柔性显示模组受力状态的前提下，相较于所述支撑层1的所述弯折区1a和所述非弯折区1b之间采用齐平设计，本申请通过在所述支撑层1的所述弯折区1a和所述非弯折区1b之间设有所述间隙14，在后续装机时，手指或者装机工具不容易碰到所述第一边缘12，从而降低了所述支撑层1的所述第一边缘12产生翘曲的概率，有利于提升良率，满足整机落摔要求。
在一种实施例中，为不改变柔性显示模组宽度方向边缘位置受力状态，所述间隙14在平行于所述弯折轴线11的方向上的宽度B小于或等于0.75毫米，在不改变柔性显示模组在边缘位置受力状态的同时，能够留出足够空间来填充胶层，以保护所述第一边缘12不受外力破坏。
在一种实施例中，请结合图5和图6，图5是本申请实施例提供的一种支撑组件的结构示意图；图6是图5中的支撑组件的局部放大结构示意图。所述间隙14内填充有具有低透湿低模量性能的胶层2。一方面，所述胶层2起到缓冲作用，能够保护所述第一边缘12不受损坏；另一方面，所述胶层2采用防水凝胶，具有防水性能，可对所述第一边缘12进行封装密封，达到可靠的水汽阻绝作用，实现良好的保护作用。
在一种实施例中，所述胶层2采用具有较低的透湿、透氧性能且具备较低的弹性模量的材料。
在一种实施例中，所述胶层2的弹性模量E介于0.05MPa（兆帕）至0.2MPa之间。
在一种实施例中，所述胶层2可选为硅基脂黏性油膜或锂基脂油膜。
在一种实施例中，请继续参阅图4，在平行于所述弯折轴线11的方向上，所述第二镂空部202的长度L2大于或等于所述第一镂空部102的长度L1，且所述第二镂空部202的长度L2小于或等于所述第一镂空部102的长度L1的1.2倍。一方面，从加工精度方面考量，所述第一镂空部102的长度不能过长，以降低狭窄的第一子镂空部1022的加工难度；另一方面，能够在保证所述支撑层1在所述第一边缘12处具有良好的延展性的前提下，来降低外界环境中的水汽和灰尘入侵到柔性显示模组内部的概率；在垂直于所述弯折轴线11的方向上，所述第一镂空部102的最大宽度不大于所述第二镂空部202的宽度，以使所述第一镂空部102相较于所述第二镂空部202整体上处于内缩状态。
在一种实施例中，在平行于所述弯折轴线11的方向上，所述第一镂空部102的长度L1为2微米。
在一种实施例中，在垂直于所述弯折轴线11的方向上，所述第一镂空部102的最大宽度不大于所述第二镂空部202的宽度。
在一种实施例中，所述第二镂空部202在垂直于所述弯折轴线11的方向上的宽度W介于180微米至220微米之间。一方面，能够避免W值设计过小而使得所述第一镂空部102的在垂直于所述弯折轴线11的方向上的宽度具有足够的减小空间；另一方面，由于柔性显示模组边缘应力随着W值的增大呈不断增大的趋势，将W值设计为此范围，可降低柔性显示模组边缘应力。
在一种实施例中，所述第二镂空部202包括沿平行于所述弯折轴线11的方向依次排列且相互连通的第一弧形镂空部2021和第一条形镂空部2022，所述第一条形镂空部2022设于所述第一弧形镂空部2021和所述第一镂空部102之间，所述第一弧形镂空部2021的形状为半椭圆状，所述第一条形镂空部2022的形状为矩形。当然，所述第二镂空部202也可为其它形状，本申请实施例不以此为限。
需要说明的是，所述第一镂空部102和所述第二镂空部202的几何尺寸关系，包括所述第一镂空部102在对应的所述第一边缘12处且在垂直于所述弯折轴线11的方向上的宽度Z、所述间隙14在平行于所述弯折轴线11的方向上的宽度B和所述第二镂空部202在垂直于所述弯折轴线11的方向上的宽度W，在一定程度上会影响所述支撑层1的边缘受力和形貌的改变，因此，对于所述第一镂空部102和所述第二镂空部202的几何尺寸确定合适的范围是十分必要的。
具体地，所述第一镂空部102在对应的所述第一边缘12处且在垂直于所述弯折轴线11的方向上的宽度Z的值越小，则所述缺口1021越窄，故而水汽和灰尘在高温高湿条件下入侵至柔性显示模组内部的概率则越小。然而，Z值范围的确定还与所述第二镂空部202在垂直于所述弯折轴线11的方向上的宽度W的值相关，若Z值与W值不匹配，所述支撑层1在展平状态与弯折状态受力则完全不相同。例如，所述支撑层1在弯折状态下，相邻两个所述支撑块101的相对表面相互抵压，则容易出现干涉现象，发生挤压拱起，这对柔性显示模组的边缘受力影响较大，极端条件下甚至直接导致柔性显示模组从边缘段失效。此外，Z值范围的确定还受到实际工艺制程精度限制，例如受到现阶段蚀刻工艺制程的加工精度限制，Z值越小，则工艺良率则越低，甚至无法加工。
考虑到柔性显示模组边缘实际受力情况，申请人通过仿真进行分析以进行组合式尺寸优化，以柔性显示模组边缘的受力大小为参考，通过改变W值与Z值来模拟柔性显示模组边缘受力情况，当柔性显示模组边缘受力最小时，确定最优的W值与Z值。
请参阅图7，图7是本申请实施例提供的W值、Z值与边缘应力值的对应关系图。仿真结果表明，W值越大，对应的柔性显示模组边缘应力相应地逐渐增大，即W越小，对缓解柔性显示模组边缘应力越有利。且柔性显示模组边缘应力随着Z值呈先减小后增大的趋势，当Z值为40微米时，柔性显示模组边缘应力可达到较优值。
在一种实施例中，结合图1和图2，为了更均匀地分散所述支撑层1在弯折过程中所受到的应力，使得所述支撑层1在所述弯折区1a具有较好的延展性，在本申请实施例中，所述支撑层1的所述弯折区1a还设置有第二镂空图案20，所述第二镂空图案20设于所述弯折区1a的中部区域，从而可以从整体上改善应用所述支撑组件100的柔性显示模组的延展性，以保证所述支撑层1与柔性显示模组的功能膜层之间的形变适应性与协调性，进而提高了柔性显示模组弯折性能，降低了膜层间的脱粘与断裂风险，改善了柔性显示模组的弯折使用寿命，提升了产品的生产良率。
具体地，请结合图8，图8是图1中的支撑层的第二种局部放大结构示意图。所述第二镂空图案20的两端分别连接一个所述第一镂空图案10连接，所述第二镂空图案20包括多个重复排列的子镂空图案20a，每一所述子镂空图案20a包括主体部201和多个第二镂空部202，其中，与所述第一镂空图案10连接的所述子镂空图案20a中的所述第二镂空部202与对应所述第一镂空图案10中的所述第一镂空部102一一对应连通。
具体地，相邻两个所述子镂空图案20a中的所述第二镂空部202一一对应连通，为了清楚描述，以图8中位于左侧的所述子镂空图案20a中的所述第二镂空部为202a、位于右侧的所述子镂空图案20a中的所述第二镂空部为202b为例进行解释说明。所述第二镂空部202a朝向所述第二镂空部为202b的一侧为非闭合的，所述第二镂空部202b朝向所述第二镂空部为202a的一侧为非闭合的，所述第二镂空部202a朝向所述第二镂空部202b的一侧，与第二镂空部为202b朝向所述第二镂空部为202a的一侧相互连通。
在一种实施例中，为了进一步提升所述支撑层1的延展性，每一所述子镂空图案20a还包括多个第三镂空部203。在垂直于所述弯折轴线11的方向上，每一所述子镂空图案20a中的所述第三镂空部203和所述第二镂空部202交替设置，且每一所述第三镂空部203对应两个间隔的所述第二镂空部202。
在一种实施例中，请结合图9，图9是本申请实施例提供的一种第三镂空部的结构示意图。所述第三镂空部203包括分别设于两端的第二弧形镂空部2031和第三弧形镂空部2032，和设于所述第二弧形镂空部2031和所述第三弧形镂空部2032之间的第二条形镂空部2033，所述第二弧形镂空部2031和所述第三弧形镂空部2032与所述第一弧形镂空部2021的形状和尺寸均相同，在垂直于所述弯折轴线11的方向上，所述第二条形镂空部2033的宽度等于所述第一条形镂空部2022的宽度。
在一种实施例中，所述第一镂空图案10和所述第二镂空图案20的镂空部内填充有具有低透湿低模量性能的胶层2。
具体地，所述第一镂空部102、所述第二镂空部202和所述第三镂空部203内也填充有具有低透湿低模量性能的所述胶层2，填充完成之后还需要对所述胶层2进行平整处理。
在一种实施例中，所述胶层2可以通过涂敷的方式填充于所述第二镂空部202和所述第三镂空部203内。
在一种实施例中，所述第二镂空部202和所述第三镂空部203内填充的所述胶层2的材料可以与所述间隙14内填充的所述胶层2的材料相同。
在一种实施例中，请继续参考图5和图6，所述支撑组件100还包括保护膜3，所述保护膜3设置于所述支撑层1远离所述柔性显示面板的一侧，所述保护膜3至少覆盖所述支撑层1对应所述弯折区1a的部分。
在一种实施例中，所述保护膜3的材料可选用具备良好的耐磨性、耐油耐腐蚀特性的材料。在高温120℃条件下，所述保护膜3不发生收缩行为且具有良好的弹性。
在一种实施例中，所述保护膜3的材料可选为热塑性聚氨酯弹性胶体材料，但并限于此。
在一种实施例中，所述支撑组件100还包括补强层4，所述补强层4设置于所述保护膜3远离所述支撑层1的一侧。所述补强层4可通过在所述保护膜3远离所述支撑层1的一侧涂敷低透湿、低模量的胶层，以对所述支撑层1进行二次密封处理，减少了水汽入侵柔性显示模组的途径，从而进一步减少了水汽入侵柔性显示模组的概率。具体地，所述补强层4的材料可以和填充于所述第一镂空部102、所述第二镂空部202、所述第三镂空部203和所述间隙14中的所述胶层2的材料相同。
可以理解的是，本申请实施例中提供的相关数据已经应用于实际生产中，并且经过有限元仿真分析技术以及对所述支撑层1弯折受力仿真云图。具体地，本申请实施例通过改变所述支撑层1的所述弯折区1a边缘位置的结构形貌，所述支撑层1采用图案化结构的设计，通过仿真验证得知，所述支撑层1受到的最大应力为526.9MPa，应力值处在其疲劳强度范围内，且远低于其选材强度1600MPa强度极限值，这表明采取此种设计方式，并不会影响柔性显示模组的受力状态。此外，仿真结果能够证实其能够有效降低水汽和灰尘在高温高湿条件下通过所述缺口1021进入柔性显示模组内部的概率，有利于提高柔性显示模组寿命。
请参阅图10，图10是本申请实施例提供的一种柔性显示模组的截面结构示意图。本申请实施例提供的柔性显示模组包括柔性显示面板200和上述实施例中的所述支撑组件100，其中，所述支撑组件100位于所述柔性显示面板200的一侧，用于支撑所述柔性显示面板200。
有益效果为：本申请提供的支撑组件及柔性显示模组，支撑组件包括支撑层，支撑层在弯折区内呈图案化结构，图案化结构包括两个垂直于弯折区的弯折轴线的第一边缘，图案化结构包括两个分别设于所述第一边缘处的第一镂空图案，第一镂空图案包括多个支撑块和多个第一镂空部，多个支撑块沿垂直于弯折轴线的方向上排列，每一第一镂空部位于相邻两个支撑块之间，且每一第一镂空部靠近邻近的第一边缘处形成一缺口，当支撑层处于弯折状态时，缺口收缩至闭合状态，有利于降低柔性显示模组在弯折状态下，水汽和灰尘入侵到模组内部的机率，提高了柔性显示模组的显示寿命。
综上所述，虽然本申请已以优选实施例揭露如上，但上述优选实施例并非用以限制本申请，本领域的普通技术人员，在不脱离本申请的精神和范围内，均可作各种更动与润饰，因此本申请的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种支撑组件，用于支撑柔性显示面板，所述支撑组件包括支撑层，所述支撑层包括至少一弯折区和位于所述弯折区两侧的非弯折区；
    所述支撑层在所述弯折区内呈图案化结构，所述图案化结构包括两个垂直于所述弯折区的弯折轴线的第一边缘，所述图案化结构包括两个分别设于所述第一边缘处的第一镂空图案，所述第一镂空图案包括多个支撑块和多个第一镂空部，多个所述支撑块沿垂直于所述弯折轴线的方向上排列，每一所述第一镂空部位于相邻两个所述支撑块之间，且每一所述第一镂空部靠近对应的所述第一边缘处形成一缺口，当所述支撑层处于弯折状态时，所述缺口收缩至闭合状态。
  2. 根据权利要求1所述的支撑组件，其中，在沿靠近对应的所述第一边缘的方向上，所述第一镂空部在垂直于所述弯折轴线的方向上的宽度逐渐减小。
  3. 根据权利要求2所述的支撑组件，其中，在沿靠近对应的所述第一边缘的方向上，所述第一镂空部在垂直于所述弯折轴线的方向上的宽度呈线性减小。
  4. 根据权利要求1所述的支撑组件，其中，所述第一镂空部包括沿平行于所述弯折轴线的方向排列且相互连通的第一子镂空部和第二子镂空部，所述第一子镂空部远离对应的所述第一边缘，所述第二子镂空部靠近对应的所述第一边缘；
    在沿靠近对应的所述第一边缘的方向上，所述第一子镂空部在垂直于所述弯折轴线的方向上的宽度为第一宽度，所述第二子镂空部在所述弯折轴线上的方向上的宽度为第二宽度；其中，所述第一宽度大于或等于所述第二宽度，且所述第一宽度逐渐减小，所述第二宽度不变。
  5. 根据权利要求1所述的支撑组件，其中，所述第一镂空部为对称图案，所述第一镂空部的对称轴平行于所述弯折轴线。
  6. 根据权利要求1所述的支撑组件，其中，所述第一镂空部在对应的所述第一边缘处且在垂直于所述弯折轴线的方向上的宽度小于或等于60微米。
  7. 根据权利要求6所述的支撑组件，其中，所述第一镂空部在对应的所述第一边缘处且在垂直于所述弯折轴线的方向上的宽度介于20微米至60微米之间。
  8. 根据权利要求1所述的支撑组件，其中，所述非弯折区包括两个垂直于所述弯折轴线的第二边缘，所述第一边缘和与之同侧设置的所述第二边缘之间设有间隙。
  9. 根据权利要求8所述的支撑组件，其中，所述间隙在平行于所述弯折轴线的方向上的宽度小于或等于0.75毫米。
  10. 根据权利要求8所述的支撑组件，其中，所述间隙内填充有具有低透湿低模量性能的胶层。
  11. 根据权利要求1所述的支撑组件，其中，所述图案化结构还包括第二镂空图案，所述第二镂空图案的两端分别连接一个所述第一镂空图案。
  12. 根据权利要求11所述的支撑组件，其中，所述第二镂空图案包括多个沿所述弯折轴线重复排列的子镂空图案。
  13. 根据权利要求12所述的支撑组件，其中，每一所述子镂空图案包括主体部和多个第二镂空部，与所述第一镂空图案连接的所述子镂空图案中的所述第二镂空部与对应所述第一镂空图案中的所述第一镂空部一一对应连通，相邻两个所述子镂空图案中的所述第二镂空部一一对应连通。
  14. 根据权利要求13所述的支撑组件，其中，在平行于所述弯折轴线的方向上，所述第二镂空部的长度大于或等于所述第一镂空部的长度，且所述第二镂空部的长度小于或等于所述第一镂空部的长度的1.2倍；在垂直于所述弯折轴线的方向上，所述第一镂空部的最大宽度不大于所述第二镂空部的宽度。
  15. 根据权利要求13所述的支撑组件，其中，所述第二镂空部在垂直于所述弯折轴线的方向上的宽度介于180微米至220微米之间。
  16. 根据权利要求13所述的支撑组件，其中，每一所述子镂空图案还包括多个第三镂空部；
    在垂直于所述弯折轴线的方向上，每一所述子镂空图案中的所述第三镂空部和所述第二镂空部交替设置，且每一所述第三镂空部对应两个间隔的所述第二镂空部。
  17. 根据权利要求11所述的支撑组件，其中，所述第一镂空图案和所述第二镂空图案的镂空部内填充有具有低透湿低模量性能的胶层。
  18. 根据权利要求1所述的支撑组件，其中，所述支撑组件还包括保护膜，所述保护膜设置于所述支撑层远离所述柔性显示面板的一侧，所述保护膜至少覆盖所述支撑层对应所述弯折区的部分。
  19. 根据权利要求18所述的支撑组件，其中，所述支撑组件还包括补强层，所述补强层设置于所述保护膜远离所述支撑层的一侧。
  20. 一种柔性显示模组，所述柔性显示模组包括：
    柔性显示面板；和
    支撑组件，所述支撑组件位于所述柔性显示面板的一侧，用于支撑所述柔性显示面板，所述支撑组件包括支撑层，所述支撑层包括至少一弯折区和位于所述弯折区两侧的非弯折区；
    所述支撑层在所述弯折区内呈图案化结构，所述图案化结构包括两个垂直于所述弯折区的弯折轴线的第一边缘，所述图案化结构包括两个分别设于所述第一边缘处的第一镂空图案，所述第一镂空图案包括多个支撑块和多个第一镂空部，多个所述支撑块沿垂直于所述弯折轴线的方向上排列，每一所述第一镂空部位于相邻两个所述支撑块之间，且每一所述第一镂空部靠近对应的所述第一边缘处形成一缺口，当所述支撑层处于弯折状态时，所述缺口收缩至闭合状态。
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