WO2021239003A1 - 支撑背板及显示装置 - Google Patents

支撑背板及显示装置 Download PDF

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Publication number
WO2021239003A1
WO2021239003A1 PCT/CN2021/096154 CN2021096154W WO2021239003A1 WO 2021239003 A1 WO2021239003 A1 WO 2021239003A1 CN 2021096154 W CN2021096154 W CN 2021096154W WO 2021239003 A1 WO2021239003 A1 WO 2021239003A1
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WO
WIPO (PCT)
Prior art keywords
area
hollow
hole
hole area
arc
Prior art date
Application number
PCT/CN2021/096154
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English (en)
French (fr)
Inventor
陈祖权
青威
刘兴国
刘少奎
王志会
曾伟
沈丹平
汤强
王策
Original Assignee
京东方科技集团股份有限公司
成都京东方光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 成都京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US17/763,398 priority Critical patent/US20220343809A1/en
Publication of WO2021239003A1 publication Critical patent/WO2021239003A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G06F1/1652—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being flexible, e.g. mimicking a sheet of paper, or rollable
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1601—Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1656—Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1675—Miscellaneous details related to the relative movement between the different enclosures or enclosure parts
    • G06F1/1681—Details related solely to hinges
    • 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

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a supporting backplane and a display device.
  • the purpose of the present disclosure is to provide a supporting backplane and a display device, the supporting backplane has good bending performance and resilience performance, and has high fatigue resistance.
  • the first aspect of the present disclosure provides a supporting backplane, which is arranged on one side of a flexible display panel, wherein the supporting backplane includes at least a main bending area, and the bending axis corresponding to the main bending area is in the first And the main bending area is provided with a plurality of first hollow holes, and the plurality of first hollow holes are arrayed in the first direction and a second direction orthogonal to the first direction And each of the first hollow holes has a first middle hole area and a first arc-shaped hole area located on both sides of the first middle hole area in the first direction; wherein,
  • the size of the first intermediate hole area in the second direction Decrease gradually, and the second direction is orthogonal to the first direction.
  • the two opposite contour lines of the first intermediate hole area in the second direction are both arc-shaped; and the first arc-shaped hole area is a semicircular hole Area;
  • the first hollow hole is symmetrically arranged with respect to its center line in the first direction.
  • the first hollow holes adjacent in the second direction are arranged in a staggered manner.
  • the diameter of the first arc-shaped hole area is 0.1 mm to 0.4 mm;
  • the size of the first intermediate hole area in the first direction is 2 mm to 7 mm, and the maximum size of the first intermediate hole area in the second direction is the same as the diameter of the first arc-shaped hole area ,
  • the minimum size of the first middle hole area in the second direction is 0.05 mm to 0.35 mm, and the radius of curvature of the arc contour line of the first middle hole area is 10 mm to 50 mm.
  • the distance between adjacent first hollow holes in the first direction is 0.05 mm to 0.3 mm;
  • the size of the misalignment between adjacent first hollow holes in the second direction is 1 mm to 4 mm;
  • the distance between the center lines of adjacent first hollow holes in the second direction is 0.2 mm to 0.5 mm.
  • the supporting backboard further includes transitional bending areas located on opposite sides of the main bending area in the second direction, and the transitional bending area is opened There are multiple hollow holes;
  • the ratio between the total area of the plurality of hollow holes in the transition bending zone and the total area of the transition bending zone is smaller than the total area of the plurality of first hollow holes in the main bending zone and the total area of the The ratio between the total area of the main bending zone.
  • the plurality of hollow holes in the transitional bending zone includes at least a second hollow hole, and the second hollow hole is provided with a plurality of hollow holes and is arranged in the first direction.
  • the second hollow holes are arranged in an array in the second direction, and the second hollow holes that are adjacent in the second direction are arranged in a staggered manner;
  • the second hollow hole has a second intermediate hole area and a second arc-shaped hole area located on both sides of the second intermediate hole area in the first direction; the shape and size of the second arc-shaped hole area The shape and size of the first arc-shaped hole area are the same; the shape of the second middle hole area is rectangular, or the two opposite contour lines of the second middle hole area in the second direction are both arcs And the size of the second middle hole area in the first direction is smaller than the size of the first middle hole area in the first direction.
  • the plurality of hollow holes in the transition bending zone further includes a third hollow hole, and the third hollow hole is located adjacent to the second hollow hole in the first direction. Between; where,
  • the third hollow hole is a round hole, and the diameter of the third hollow hole is the same as the diameter of the first arc-shaped hole area.
  • a second aspect of the present disclosure provides a display device, which includes: a flexible display panel and the support backplane described in any one of the above, and the support backplane is arranged on one side of the flexible display panel.
  • a foam adhesive layer is further included, and the foam adhesive layer is bonded between the support backplane and the flexible display panel.
  • the design of this design can be compared with the solution of a rectangular elongated hole in the middle area mentioned in the related art.
  • the stress received during the bending process is decomposed in multiple directions, therefore, the maximum stress during bending can be reduced, and the fatigue resistance of the supporting back plate can be improved.
  • the middle area of the first hollowed-out hole is gradually shrinking, in the design process, the first hollowed-out holes arranged in the second direction can be made closer, thereby increasing the first hollowed-out hole per unit area. In this way, the maximum bending stress is reduced while ensuring the resilience of the supporting backplane.
  • FIG. 1 is a schematic diagram of the structure of a supporting backplane shown in the related art
  • FIG. 2 is a stress cloud diagram of the supporting backplane shown in the related art when it is bent;
  • FIG. 3 is a side view structure diagram of a display device with a supporting backplane, a flexible display panel and a foam glue layer according to an embodiment of the disclosure
  • FIG. 4 is a schematic diagram of a three-dimensional structure of a supporting backplane according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of a planar structure of a supporting backplane according to an embodiment of the disclosure
  • FIG. 6 is a schematic diagram of the structure of the first hollow hole in the supporting back plate according to an embodiment of the present disclosure
  • Fig. 7 is a stress cloud diagram of the supporting back plate shown in Fig. 4 when it is bent;
  • Figure 8 shows a schematic diagram of the product bent into a drop shape
  • FIG. 9 is a schematic diagram of a planar structure of a supporting backplane according to another embodiment of the present disclosure.
  • FIG. 10 is a schematic plan view of a supporting backplane according to another embodiment of the present disclosure.
  • Flexible display products are a new generation of display technology that is developing rapidly and can adapt to a variety of application scenarios. While lightweight and flexible (such as large-angle bending and curling) bring a better experience to consumers, they also face a series of problems.
  • FIG. 1 shows a stress cloud diagram of the supporting back plate 10 shown in the related art when it is bent, and the maximum stress in FIG. 2 is 430.2 MPa.
  • the maximum stress in FIG. 2 is 430.2 MPa.
  • an embodiment of the present disclosure discloses a supporting backplane 20, as shown in FIG.
  • the supporting backboard 20 includes at least a main bending zone 20a, and the bending axis corresponding to the main bending zone 20a extends in the first direction X; the main bending zone 20a is provided with a plurality of The first hollow holes 201 are arranged in an array in the first direction X and the second direction Y; in the embodiments of the present disclosure, according to the negative correlation between fatigue and maximum stress, The pattern of the first hollow holes 201 on the main bending area 20a of the supporting back plate 20 is optimized, which can reduce the maximum stress during bending while not reducing the resilience, and improve the fatigue resistance of the supporting back plate 20.
  • the main bending area 20a is provided with a plurality of first hollow holes 201, and the plurality of first hollow holes 201 are arranged in an array in a first direction X and a second direction Y orthogonal to the first direction X; for example, As shown in FIG. 6, each first hollow hole 201 has a first middle hole area 201a and first arc-shaped hole areas 201b located on both sides of the first middle hole area 201a in the first direction X; From the position where the hole region 201a and the first arc-shaped hole region 201b meet to the center position of the first middle hole region 201a, the size of the first middle hole region 201a in the second direction Y gradually decreases. In this way, the first hollow hole 201 may have a dumbbell shape or a dumbbell-like shape as a whole. It should be noted that the second direction Y mentioned in the embodiment of the present disclosure is orthogonal to the first direction X.
  • the first hollow holes 201 adjacent to each other in the second direction Y are arranged in a staggered manner.
  • the middle area of the first hollow hole 201 is gradually shrinking inward, so that the design is compared with the solution of a rectangular elongated hole in the middle area mentioned in the related art (as shown in FIG. 1) , It can decompose the stress in the bending process in multiple directions. Therefore, in this way, the maximum stress during bending can be reduced, and the fatigue resistance of the supporting back plate 20 can be improved.
  • the stress cloud diagram of the supporting back plate 10 of the embodiment of the present disclosure during bending is shown in FIG. 7, and the maximum stress is about 406 MPa.
  • the middle area of the first hollowed-out holes 201 is gradually retracted and arranged in a staggered manner, during the design process, the first hollowed-out holes 201 arranged in the second direction Y can be made closer. In other words, this design can make the phase
  • the distance between adjacent first hollow holes 201 in the second direction Y is smaller, for example, can be reduced by 0.15 mm. Therefore, the number of first hollow holes 201 per unit area can be increased. Comparing FIG. 1 and FIG. 5, it can be seen that while reducing the maximum bending stress, it can also ensure the resilience of the supporting back plate 20.
  • the number of the first hollow holes 201 of the supporting back plate 20 of the present disclosure per unit area can be increased by 1/8.
  • the supporting back plate 20 can be made of a material with a certain thickness and rigidity.
  • the thickness of the supporting back plate 20 can be about 100 ⁇ m to 200 ⁇ m, such as: 100 ⁇ m, 150 ⁇ m, 200 ⁇ m, etc.; the material can be a metal material or an alloy material, such as: SUS301 (301 stainless steel), SUS304 (304 stainless steel), titanium alloy, etc., but not limited thereto.
  • the supporting back plate 20 may also undergo a strengthening treatment, for example, a surface strengthening treatment is performed after the patterning operation is completed, so that the surface hardness thereof is greatly higher than HR60. In this way, the wear resistance of the support back plate 20 can be improved, and the life of the support back plate 20 can be improved.
  • the two opposite contour lines of the first middle hole region 201a in the second direction Y in the first hollow hole 201 are both arc-shaped; and the first arc-shaped hole region 201b It is a semi-circular hole area; this design relieves the stress concentration at the first hollow hole 201, thereby improving the fatigue resistance of the supporting back plate 20.
  • the first hollow hole 201 is symmetrically arranged with respect to its center line in the first direction X. It should be understood that the center of the first middle hole region 201a and the center of the first arc-shaped hole region 201b are located on the same straight line.
  • the diameter D of the first arc-shaped hole area 201b is about 0.1mm to 0.4mm, such as: 0.1mm, 0.2mm, 0.3mm, 0.4mm, etc.; the first middle hole area 201a
  • the size L in the first direction X is about 2mm to 7mm, such as: 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, etc.; the maximum size of the first middle hole area 201a in the second direction Y is the same as the first arc
  • the diameter D of the shaped hole area 201b is the same, and the minimum dimension W of the first middle hole area 201a in the second direction Y is about 0.05mm to 0.35mm, such as: 0.05mm, 0.15mm, 0.25mm, 0.3mm, 0.35mm, etc.
  • the radius of curvature R of the arc contour line of the first middle hole region 201a is about 10 mm to 50 mm, such as 10 mm, 20 mm, 30 mm, 40 mm, 50 mm
  • the distance h1 between adjacent first hollow holes 201 in the first direction X is 0.05 mm to 0.3 mm, such as: 0.05 mm, 0.15 mm, 0.25 mm, 0.3 mm, etc.; in the second direction Y
  • the misalignment size h2 between adjacent first hollow holes 201 is 1mm to 4mm, such as: 1mm, 2mm, 3mm, 4mm, etc.;
  • the distance between the center lines of adjacent first hollow holes 201 in the second direction Y h3 is 0.2mm to 0.5mm; for example: 0.2mm, 0.3mm, 0.4mm, 0.5mm and so on.
  • the misalignment dimension h2 mentioned in the implementation of the present disclosure can be understood as the distance between the same end points of adjacent first hollow holes 201 in the second direction Y, and this end point refers to the first hollow holes The end point of 201 in the first direction X, where the end point is located on the center line of the first hollow hole 201 in the first direction X.
  • the supporting back plate 20 includes not only the main bending area 20 a, but also the fixing area 20 b.
  • the fixing areas 20 b are located on opposite sides of the main bending area 20 a in the second direction Y. Wherein, the main bending area 20a can be bent in the second direction Y. When the main bending area 20a is bent in the second direction Y, the fixing area 20b will not affect the bending of the main bending area 20a. Fold effect.
  • the fixed area 20b of the supporting backplane 20 needs to be opposite to the fixed area of the flexible display panel 30, and the flexible display panel 30 on which the supporting backplane 20 is installed is bent in the second direction Y.
  • the fixing area 20b needs to be fixed to facilitate the bending of the main bending area 20a, or to maintain the bending state of the main bending area 20a.
  • the fixing area 20b of the supporting back plate 20 needs to have sufficient rigidity.
  • the rigidity of the fixed area 20b is greater than the rigidity of the main bending area 20a. Therefore, in order to make the rigidity of the fixed area 20b sufficiently large, the embodiment of the present disclosure may not perform patterning processing on the fixed area 20b, but it is not limited to this.
  • the fixed area 20b may also be patterned, as long as the rigidity of the fixed area 20b can be satisfied. Support performance is enough.
  • the strain at different positions of the supporting back plate 20 is different.
  • the A zone in the drop shape product is a high strain zone and the B zone is a low strain zone.
  • the object marked 50 in FIG. 8 may be a fixed block, and the fixed block 50 can clamp the end of the product to keep the product in a drop-shaped folded state.
  • the opening patterns of different strain areas can be designed.
  • the bending area of the supporting backplate 20 implemented in the present disclosure not only includes the aforementioned main bending area 20a, but also includes transition bending areas located on opposite sides of the main bending area 20a in the second direction Y. 20c, the transition bending zone 20c is provided with a plurality of hollow holes; wherein, the ratio between the total area of the plurality of hollow holes in the transition bending zone 20c and the total area of the transition bending zone 20c is smaller than that in the main bending zone 20a The ratio between the total area of the plurality of first hollow holes 201 and the total area of the main bending area 20a. That is, the proportion of openings in the transition bending zone 20c is smaller than that of the main bending zone 20a, and the rigidity of the transition bending zone 20c is greater than that of the main bending zone 20a.
  • the main bending area 20a of the backing plate 20 may be a high strain area, and the transition bending area 20c may be a low strain area. Therefore, in order to ensure that the main bending area 20a has better bending performance , The openings on the main bending area 20a can be made larger, so that the rigidity of the main bending area 20a is relatively small; and in order to ensure that the entire supporting back plate 20 has a good resilience, it is necessary to make the transition bending area 20c The opening occupancy is relatively small, so that the rigidity of the transition bending area 20c is relatively large, and the bending performance and resilience performance of the entire supporting backplate 20 are balanced by the design of the transition bending area 20c and the main bending area 20a. That is, while ensuring that the entire supporting back plate 20 has good bending performance, it can also have good resilience performance, thereby improving the overall fatigue resistance of the supporting back plate 20.
  • the plurality of hollow holes in the transition bending zone 20c include at least a second hollow hole 202, and the second hollow holes 202 are provided with a plurality of holes and are arranged in an array in the first direction X and the second direction Y , And adjacent second hollow holes 202 in the second direction Y are arranged in a staggered arrangement; wherein, the second hollow holes 202 have a second middle hole area and second middle hole areas located on both sides of the second middle hole area in the first direction X Curved hole area.
  • the shape and size of the second arc-shaped hole region of the second hollow hole 202 can be the same as the shape and size of the first arc-shaped hole region 201b of the first hollow hole 201 mentioned above, and will not be omitted here. Repeat, but not limited to this.
  • the shape and size of the second arc-shaped hole region in the second hollow hole 202 may also be different from the shape and size of the first arc-shaped hole region 201b of the first hollow hole 201 mentioned above, depending on the specific situation.
  • the shape of the second middle hole area in the second hollow hole 202 may be rectangular, as shown in FIG. 9, when the second arc-shaped hole area in the second hollow hole 202 is a semicircular hole area ,
  • the size of the second middle hole area in the second hollow hole 202 in the second direction Y may be the same as the diameter of the second arc-shaped hole area. It should be understood that the center of the second middle hole area in the second hollow hole 202 The center of the second arc-shaped hole area is located on the same straight line.
  • the two opposite contour lines of the second middle hole region in the second direction Y are both arc-shaped.
  • the shape of the second hollow hole 202 is the same as that of the first hollow hole 201.
  • the arc-shaped contour line can be arc-shaped to further alleviate the problem of stress concentration, thereby ensuring the overall fatigue resistance of the supporting back plate 20.
  • the minimum size of the second middle hole area in the second direction Y can refer to the minimum size of the first middle hole area 201a in the first hollow hole 201 described above.
  • the size of the second middle hole region in the second hollow hole 202 in the first direction X may be smaller than that of the first middle hole region 201a in the first hollow hole 201.
  • the size in the direction X but not limited to this, the size of the second middle hole area in the first direction X can also be greater than or equal to the size of the first middle hole area 201a in the first direction X, and it is only necessary to ensure The proportion of the openings in the transition bending zone 20c is smaller than the proportion of the openings in the main bending zone 20a.
  • the plurality of hollow holes in the transition bending zone 20c may further include a third hollow hole 203, and the third hollow hole 203 is located adjacent to the second hole in the first direction X. Between the hollow holes 202.
  • the third hollow hole 203 is a round hole, and the diameter of the third hollow hole 203 can be the same as the diameter of the first arc-shaped hole area 201b of the first hollow hole 201, but it is not limited to this, and can also be different. It is sufficient to ensure that the proportion of the openings in the transition bending zone 20c is smaller than the proportion of the openings in the main bending zone 20a.
  • the distance between the second hollowed-out hole 202 and the third hollowed-out hole 203 in the first direction X in the transition bending zone 20c can refer to the distance between adjacent first hollowed holes 201 in the first direction X in the main bending zone 20a The distance between the two is not repeated here.
  • the distance between the adjacent second hollowed holes 202 or the adjacent third hollowed holes 203 in the second direction Y in the transition bending zone 20c can refer to the adjacent first hollows in the second direction Y in the main bending zone 20a The spacing between the holes 201 will not be repeated here.
  • the types of hollow holes in the transitional bending area 20c are not limited to these two types, and more types can be provided, and the shapes of the second hollow holes 202 and the third hollow holes 203 are not limited to those mentioned in the foregoing embodiment.
  • the shape can also be other shapes. In short, it is only necessary to ensure that the proportion of the openings in the transition bending zone 20c is smaller than the proportion of the openings in the main bending zone 20a.
  • the size of the main bending area 20a in the second direction Y and the size of the transition bending area 20c in the second direction Y may be determined according to the bending shape and the bending radius. Specifically, when the supporting back plate 20 is bent into a drop shape, the size of the main bending area 20a in the second direction Y and the size of the transition bending area 20c in the second direction Y may be specifically determined according to the bending radius.
  • the size of the corresponding main bending area 20a in the second direction Y is 9.3mm to 9.6mm, such as: 9.3mm, 9.4mm, 9.5 mm, 9.6mm, etc.
  • the size of the transition bending zone 20c in the second direction Y is 11.4mm to 11.8mm, for example: 11.4mm, 11.5mm, 11.6mm, 11.7mm, 11.8mm, etc.; in the drop-shaped support
  • the size of the corresponding main bending area 20a in the second direction Y is 12.4mm to 12.7mm, for example: 12.4mm, 12.5mm, 12.6mm, 12.7mm, etc.
  • the size of the folding area 20c in the second direction Y is 15.2 mm to 15.6 mm, such as 15.2 mm, 15.3 mm, 15.4 mm, 15.5 mm, 15.6 mm, and so on.
  • An embodiment of the present disclosure also provides a display device, as shown in FIG. 3, which may include: a flexible display panel 30 and the support backplane 20 described in any of the foregoing embodiments, and the support backplane 20 is disposed on the flexible display panel.
  • a display device as shown in FIG. 3, which may include: a flexible display panel 30 and the support backplane 20 described in any of the foregoing embodiments, and the support backplane 20 is disposed on the flexible display panel.
  • the flexible display panel 30 may be an OLED (Organic Light-Emitting Diode) display.
  • the display device may further include a buffer adhesive layer 40, which is bonded between the supporting backplane 20 and the flexible display panel 30; in the embodiments of the present disclosure, the buffer adhesive layer 40 is provided to support The adhesion between the back plate 20 and the flexible display panel 30 can also serve as a function of absorbing misalignment and buffering.
  • the cushion rubber layer 40 may be a foam rubber layer, that is, the cushion rubber layer 40 is made of foam rubber, which can improve the cushioning performance and deformation recovery performance of the cushion rubber layer 40. In addition, it can also solve the problem.
  • the printing problem during the bonding process of the supporting backplane 20 and the flexible display panel 30 can also enhance the resilience of the display device and the flatness of the whole machine.
  • the thickness of the buffer layer 40 may be 100 ⁇ m to 200 ⁇ m, such as: 100 ⁇ m, 120 ⁇ m, 140 ⁇ m, 160 ⁇ m, 180 ⁇ m, 200 ⁇ m, and so on.
  • the specific types of display devices are not particularly limited.
  • the types of display devices commonly used in the field can be used, such as OLED displays, mobile devices such as mobile phones, wearable devices such as watches, and VR (Virtual Reality, Those skilled in the art can select virtual reality (virtual reality) devices and so on according to the specific purpose of the display device, which will not be repeated here.
  • the display device in addition to the flexible display panel 30 and the supporting backplane 20, the display device also includes other necessary components and components. Taking the display as an example, specifically such as a housing, a circuit board, a power cord, etc., the art is good at The understanding can be supplemented according to the specific usage requirements of the display device, which will not be repeated here.

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  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种支撑背板(20)及显示装置。支撑背板(20)设置在柔性显示面板(30)的一侧，且支撑背板(20)至少包括主弯折区(20a)，主弯折区(20a)对应的弯折轴线在第一方向(X)上延伸；且主弯折区(20a)开设有多个第一镂空孔(201)，多个第一镂空孔(201)在第一方向(X)上和与第一方向(X)正交的第二方向(Y)上阵列排布；且各第一镂空孔(201)具有第一中间孔区(201a)和位于第一中间孔区(201a)在第一方向(X)上两侧的第一弧形孔区(201b)；其中，沿着第一中间孔区(201a)与第一弧形孔区(201b)相接的位置至第一中间孔区(201a)的中心位置的方向上，第一中间孔区(201a)在第二方向(Y)上的尺寸逐渐减小，第二方向(Y)与第一方向(X)正交。支撑背板(20)具有良好的弯折性能和回弹性能，以及具有较高的抗疲劳性能。

Description

支撑背板及显示装置
交叉引用
本公开要求于2020年5月29日提交的申请号为202020952904.5名称为“支撑背板及显示装置”的中国专利申请的优先权，该中国专利申请的全部内容通过引用全部并入本文。
技术领域
本公开涉及显示技术领域，具体而言，涉及一种支撑背板及显示装置。
背景技术
随着显示技术发展，可折叠、可拉伸及可卷曲等柔性显示面板逐渐进入消费者的视线。为了便于柔性显示面板弯曲或恢复，需要使得柔性显示面板更加轻薄化。
然而，随着柔性显示面板变得更加轻薄，整体的耐弯折、抗冲击性能较差；降低了产品的可靠性和稳定性。
需要说明的是，在上述背景技术部分公开的信息仅用于加强对本公开的背景的理解，因此可以包括不构成对本领域普通技术人员已知的现有技术的信息。
需要说明的是，在上述背景技术部分公开的信息仅用于加强对本公开的背景的理解，因此可以包括不构成对本领域普通技术人员已知的现有技术的信息。
公开内容
本公开的目的在于提供一种支撑背板及显示装置，该支撑背板具有良好的弯折性能和回弹性能，以及具有较高的抗疲劳性能。
本公开第一方面提供了一种支撑背板，设置在柔性显示面板的一侧，其中，所述支撑背板至少包括主弯折区，所述主弯折区对应的弯折轴线在第一方向上延伸；且所述主弯折区开设有多个第一镂空孔，多个所述第一镂空孔在所述第一方向上和与所述第一方向正交的第二方向上阵列 排布；且各所述第一镂空孔具有第一中间孔区和位于所述第一中间孔区在所述第一方向上两侧的第一弧形孔区；其中，
沿着所述第一中间孔区与所述第一弧形孔区相接的位置所述第一中间孔区的中心位置的方向上，所述第一中间孔区在第二方向上的尺寸逐渐减小，所述第二方向与所述第一方向正交。
在本公开的一种示例性实施例中，所述第一中间孔区在所述第二方向上相对的两轮廓线均呈弧形；且所述第一弧形孔区为半圆形孔区；
其中，所述第一镂空孔关于自身在所述第一方向上的中心线呈对称设置。
在本公开的一种示例性实施例中，在所述第二方向上相邻的所述第一镂空孔错位设置。
在本公开的一种示例性实施例中，所述第一弧形孔区的直径为0.1mm至0.4mm；
所述第一中间孔区在所述第一方向上的尺寸为2mm至7mm，所述第一中间孔区在所述第二方向上的最大尺寸与所述第一弧形孔区的直径相同，所述第一中间孔区在所述第二方向上的最小尺寸为0.05mm至0.35mm，且所述第一中间孔区的弧形轮廓线的曲率半径为10mm至50mm。
在本公开的一种示例性实施例中，在所述第一方向上相邻第一镂空孔之间的间距为0.05mm至0.3mm；
在所述第二方向上相邻第一镂空孔之间的错位尺寸为1mm至4mm；
在所述第二方向上相邻第一镂空孔的所述中心线之间的间距为0.2mm至0.5mm。
在本公开的一种示例性实施例中，所述支撑背板还包括位于所述主弯折区在所述第二方向上相对两侧的过渡弯折区，所述过渡弯折区上开设有多个镂空孔；
其中，所述过渡弯折区中多个镂空孔的总面积与所述过渡弯折区的总面积之间的比值小于所述主弯折区中多个第一镂空孔的总面积与所述主弯折区的总面积之间的比值。
在本公开的一种示例性实施例中，所述过渡弯折区的多个镂空孔至 少包括第二镂空孔，所述第二镂空孔设置有多个，并在所述第一方向上和所述第二方向上阵列排布，且在所述第二方向上相邻的所述第二镂空孔错位设置；其中，
所述第二镂空孔具有第二中间孔区和位于所述第二中间孔区在所述第一方向上两侧的第二弧形孔区；所述第二弧形孔区的形状、大小与所述第一弧形孔区的形状、大小相同；所述第二中间孔区的形状呈矩形，或所述第二中间孔区在所述第二方向上相对的两轮廓线均呈弧形；且所述第二中间孔区在所述第一方向上的尺寸小于所述第一中间孔区在所述第一方向上的尺寸。
在本公开的一种示例性实施例中，所述过渡弯折区的多个镂空孔还包括第三镂空孔，所述第三镂空孔位于在所述第一方向上相邻第二镂空孔之间；其中，
所述第三镂空孔为圆孔，且所述第三镂空孔的直径与所述第一弧形孔区的直径相同。
本公开第二方面提供了一种显示装置，其包括：柔性显示面板及上述任一项所述的支撑背板，所述支撑背板设置在所述柔性显示面板的一侧。
在本公开的一种示例性实施例中，还包括泡棉胶层，所述泡棉胶层粘合在所述支撑背板与所述柔性显示面板之间。
本公开提供的技术方案可以达到以下有益效果：
本公开所提供的支撑背板及显示装置，由于第一镂空孔的中间区域呈逐渐内缩，这样设计相比于相关技术中提到的中间区域为矩形的长条形孔的方案，能够对弯折过程中所受到的应力进行多方向分解，因此，可降低弯折时的最大应力，提高支撑背板的抗疲劳性。
此外，由于第一镂空孔的中间区域呈逐渐内缩，因此，在设计过程中，可使得在第二方向上排布的第一镂空孔更加紧密，从而可提高单位面积内第一镂空孔的数量，这样使得弯折最大应力降低的同时还可保证支撑背板的回弹力。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为相关技术中示出的支撑背板的结构示意图；
图2为相关技术中示出的支撑背板在弯折时的应力云图；
图3为本公开一实施例所述的具有支撑背板、柔性显示面板和泡棉胶层的显示装置的侧视结构图；
图4为本公开一实施例所述的支撑背板的立体结构示意图；
图5为本公开一实施例所述的支撑背板的平面结构示意图；
图6为本公开一实施例所述的支撑背板中第一镂空孔的结构示意图；
图7为图4中所示出的支撑背板在弯折时的应力云图；
图8示出了产品弯折呈水滴状的示意图；
图9为本公开另一实施例所述的支撑背板的平面结构示意图；
图10为本公开又一实施例所述的支撑背板的平面结构示意图。
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的实施方式；相反，提供这些实施方式使得本实用新型将全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。图中相同的附图标记表示相同或类似的结构，因而将省略它们的详细描述。
虽然本说明书中使用相对性的用语，例如“上”、“下”来描述图标的一个组件对于另一组件的相对关系，但是这些术语用于本说明书中仅出于方便，例如根据附图中所述的示例的方向。能理解的是，如果将图标的装置翻转使其上下颠倒，则所叙述在“上”的组件将会成为在“下”的组件。当某结构在其它结构“上”时，有可能是指某结构一体形成于其它结构上，或指某结构“直接”设置在其它结构上，或指某结构通过另一结构 “间接”设置在其它结构上。
用语“一个”、“一”、“该”、“所述”和“至少一个”用以表示存在一个或多个要素/组成部分/等；用语“包括”和“具有”用以表示开放式的包括在内的意思并且是指除了列出的要素/组成部分/等之外还可存在另外的要素/组成部分/等。
柔性显示产品是目前发展较快，可以适应多种应用场景的新一代显示技术。轻量化，柔性化(如大角度弯曲，卷曲)带给消费者更好体验的同时，也面临着一系列问题。
柔性显示产品需要承受大量的弯折工况，特别是高频(10万次)弯折中，其支撑背板往往由于受到较大的交变应力，而发生疲劳损坏。相关技术中的设计思路是，如图1所示，对支撑背板10的弯折区进行蚀刻，形成两端为圆弧形、中间为矩形的长条形孔11，以便降低其抗弯性，并降低弯折时的最大应力，从而使得支撑背板10的抗疲劳性满足要求。图2示出了相关技术中示出的支撑背板10在弯折时的应力云图，图2中最大应力为430.2MPa。但目前针对更高的疲劳要求，支撑背板的弯折次数仍然有提升空间。
为改善上述问题，本公开一实施例公开了一种支撑背板20，如图3所示，该支撑背板20可设置在柔性显示面板30的一侧，用于支撑柔性显示面板30。如图4和图5所示，此支撑背板20至少包括主弯折区20a，该主弯折区20a对应的弯折轴线在第一方向X上延伸；主弯折区20a开设有多个第一镂空孔201，多个第一镂空孔201在第一方向X上和第二方向Y上阵列排布；在本公开的实施例中，依据疲劳性与最大应力的负相关性，通过对支撑背板20中主弯折区20a上的第一镂空孔201的图案进行优化设计，在不降低回弹力的同时，可降低弯折时的最大应力，提高支撑背板20的抗疲劳性。
具体地，主弯折区20a开设有多个第一镂空孔201，多个第一镂空孔201在第一方向X上和与第一方向X正交的第二方向Y上阵列排布；如图6所示，各第一镂空孔201具有第一中间孔区201a和位于第一中间孔区201a在第一方向X上两侧的第一弧形孔区201b；其中，沿着第一中间孔区201a与第一弧形孔区201b相接的位置至第一中间孔区201a的 中心位置的方向上，第一中间孔区201a在第二方向Y上的尺寸逐渐减小。如此，该第一镂空孔201整体上可以呈哑铃形或者类似哑铃的形状。需要说明的是，本公开实施例中提到的第二方向Y与第一方向X正交。
在本公开的实施例中，如图5所示，在第二方向Y上相邻的第一镂空孔201错位设置。
在本公开的实施例中，第一镂空孔201的中间区域呈逐渐内缩，这样设计相比于相关技术中提到的中间区域为矩形的长条形孔的方案(如图1所示)，能够对弯折过程中所受到的应力进行多方向分解。因此，这样可降低弯折时的最大应力，提高支撑背板20的抗疲劳性。本公开实施例的支撑背板10在弯折时的应力云图如图7所示，最大应力约为406MPa。
此外，由于第一镂空孔201的中间区域呈逐渐内缩且错位设置，在设计过程中，可使得沿第二方向Y上排布的第一镂空孔201更加紧密，换言之，如此设计可使得相邻第一镂空孔201在第二方向Y上的间距更小，例如可以减小0.15mm。从而可提高单位面积内第一镂空孔201的数。对比图1和图5可知，这样使得弯折最大应力降低的同时还可保证支撑背板20的回弹力。在本公开的一种实施方式中，相较于相关技术中采用矩形的镂空孔，本公开的支撑背板20的第一镂空孔201在单位面积内的数量可以提高1/8。
应当理解的是，为了提高支撑背板20的支撑性能，此支撑背板20可采用具有一定厚度和刚性的材料制作而成，例如：支撑背板20的厚度可约为100μm至200μm，比如：100μm、150μm、200μm等等；材料可为金属材料或合金材料，比如：SUS301(301不锈钢)、SUS304(304不锈钢)和钛合金等，但不限于此。可选地，支撑背板20还可以经过强化处理，例如在图案化操作完成以后进行表面强化处理，使得其表面硬度大大HR60以上。如此，可以提高支撑背板20的抗磨损能力，并提高支撑背板20的寿命。
在一些实施例中，如图5和图6可知，第一镂空孔201中第一中间孔区201a在第二方向Y上相对的两轮廓线均呈弧形；且第一弧形孔区201b为半圆形孔区；这样设计缓解第一镂空孔201处出现应力集中的情况，从而提高支撑背板20的抗疲劳性。其中，第一镂空孔201关于自身 在第一方向X上的中心线呈对称设置。应当理解的是，第一中间孔区201a的中心与第一弧形孔区201b的中心位于同一条直线上。
可选地，如图6所示，第一弧形孔区201b的直径D约为0.1mm至0.4mm，比如：0.1mm、0.2mm、0.3mm、0.4mm等等；第一中间孔区201a在第一方向X上的尺寸L约为2mm至7mm，比如：2mm、3mm、4mm、5mm、6mm、7mm等等；第一中间孔区201a在第二方向Y上的最大尺寸与第一弧形孔区201b的直径D相同，第一中间孔区201a在第二方向Y上的最小尺寸W约为0.05mm至0.35mm，比如：0.05mm、0.15mm、0.25mm、0.3mm、0.35mm等等，且第一中间孔区201a的弧形轮廓线的曲率半径R约为10mm至50mm，比如：10mm、20mm、30mm、40mm、50mm等等。
进一步地，在第一方向X上相邻第一镂空孔201之间的间距h1为0.05mm至0.3mm，比如：0.05mm、0.15mm、0.25mm、0.3mm等等；在第二方向Y上相邻第一镂空孔201之间的错位尺寸h2为1mm至4mm，比如：1mm、2mm、3mm、4mm等等；在第二方向Y上相邻第一镂空孔201的中心线之间的间距h3为0.2mm至0.5mm；比如：0.2mm、0.3mm、0.4mm、0.5mm等等。
如图5所示，在本公开实施中提到的错位尺寸h2可理解为在第二方向Y上相邻第一镂空孔201中同一端点之间的间距，此端点指的是第一镂空孔201在第一方向X上的端点，此端点位于第一镂空孔201在第一方向X上的中心线上。
需要说明的是，如图1所示，支撑背板20不仅包括主弯折区20a，还可包括固定区20b，固定区20b位于主弯折区20a在第二方向Y上的相对两侧。其中，该主弯折区20a能够在第二方向Y上进行弯折，当主弯折区20a在第二方向Y上进行弯折时，固定区20b并不会影响到主弯折区20a的弯折效果。应当理解的是，此支撑背板20的固定区20b需与柔性显示面板30的固定区相对，在安装有此支撑背板20的柔性显示面板30在第二方向Y上进行弯折的过程中，需要对固定区20b进行固定，以便于主弯折区20a进行弯折，或保持主弯折区20a的弯折状态。
此外，还应当理解的是，为了保证支撑背板20的支撑稳定性，该支 撑背板20的固定区20b需要具有足够大的刚性。其中，固定区20b的刚性大于主弯折区20a的刚性。因此为了使得固定区20b的刚性足够大，本公开实施例可不对固定区20b进行图案化处理，但不限于此，也可对固定区20b进行图案化处理，只要保证固定区20b的刚性能够满足支撑性能即可。
在弯折过程中，支撑背板20不同位置的应变不同。例如，如图8所示，在将产品弯折呈水滴状时，该水滴状产品中A区为高应变区，B区为低应变区。需要说明的是，图8中标号为50的物体可为固定块，该固定块50能够夹持产品的端部，以用于保持产品处于水滴形折叠状态。其中，为了保证产品的可弯折性和回弹能力，可对不同应变区的开孔图案进行设计。具体地，本公开实施的支撑背板20的弯折区不仅包括前述提到的主弯折区20a，还可包括位于主弯折区20a在第二方向Y上相对两侧的过渡弯折区20c，过渡弯折区20c上开设有多个镂空孔；其中，过渡弯折区20c中多个镂空孔的总面积与过渡弯折区20c的总面积之间的比值小于主弯折区20a中多个第一镂空孔201的总面积与主弯折区20a的总面积之间的比值。即：过渡弯折区20c的开孔占比小于主弯折区20a的开孔占比，过渡弯折区20c的刚性大于主弯折区20a的刚性。
其中，本公开实施例中支撑背板20的主弯折区20a可为高应变区，过渡弯折区20c可为低应变区，因此，为了保证主弯折区20a具有更好的弯折性能，可使得主弯折区20a上开孔占比较大，从而使得主弯折区20a的刚性较小；而为了保证整个支撑背板20具有良好的回弹能力，需使过渡弯折区20c上开孔占比较小，从而使得过渡弯折区20c的刚性较大，通过过渡弯折区20c和主弯折区20a的设计对整个支撑背板20的弯折性能和回弹性能进行平衡。即：在保证整个支撑背板20具有良好弯折性能的同时，还可具有良好的回弹性能，从而提高支撑背板20整体的抗疲劳性。
在一些实施例中，过渡弯折区20c的多个镂空孔至少包括第二镂空孔202，第二镂空孔202设置有多个，并在第一方向X上和第二方向Y上阵列排布，且在第二方向Y上相邻的第二镂空孔202错位设置；其中，第二镂空孔202具有第二中间孔区和位于第二中间孔区在第一方向X上 两侧的第二弧形孔区。通过将第二镂空孔202在第一方向上的边缘区域设置为圆弧形，可缓解应力集中的问题，从而保证支撑背板20整体的抗疲劳性。
举例而言，此第二镂空孔202的第二弧形孔区的形状、大小可与前述提到的第一镂空孔201的第一弧形孔区201b的形状、大小相同，在此不再重复赘述，但不限于此。第二镂空孔202中第二弧形孔区的形状、大小也可与前述提到的第一镂空孔201的第一弧形孔区201b的形状、大小不同，视具体情况而定。
在一些实施例中，第二镂空孔202中第二中间孔区的形状可呈矩形，如图9所示，在第二镂空孔202中的第二弧形孔区为半圆形孔区时，第二镂空孔202中第二中间孔区在第二方向Y上的尺寸可与第二弧形孔区的直径相同，应当理解的是，第二镂空孔202中第二中间孔区的中心与其第二弧形孔区的中心位于同一条直线上。
在另一些实施例中，第二中间孔区在第二方向Y上相对的两轮廓线均呈弧形，如图10所示，该第二镂空孔202的形状与第一镂空孔201的形状类似；进一步地，此弧形轮廓线可呈圆弧形，以进一步可缓解应力集中的问题，从而保证支撑背板20整体的抗疲劳性。其中，第二中间孔区在第二方向Y上的最小尺寸可参考前述第一镂空孔201中第一中间孔区201a的最小尺寸。
需要说明的是，如图9和图10所示，第二镂空孔202中第二中间孔区在第一方向X上的尺寸可小于第一镂空孔201中第一中间孔区201a在第一方向X上的尺寸，但不限与此，也可第二中间孔区在第一方向X上的尺寸也可大于或等于第一中间孔区201a在第一方向X上的尺寸，只需保证过渡弯折区20c中的开孔占比小于主弯折区20a中的开孔占比即可。
在一些实施例中，如图9和图10所示，过渡弯折区20c的多个镂空孔还可包括第三镂空孔203，第三镂空孔203位于在第一方向X上相邻第二镂空孔202之间。其中，第三镂空孔203为圆孔，且第三镂空孔203的直径可与前述第一镂空孔201的第一弧形孔区201b的直径相同，但不限于此，也可不同，只需保证过渡弯折区20c中的开孔占比小于主弯折 区20a中的开孔占比即可。
其中，过渡弯折区20c中第二镂空孔202与第三镂空孔203在第一方向X上的间距可参考主弯折区20a中在第一方向X上相邻第一镂空孔201之间的间距，在此不再重复赘述。过渡弯折区20c中在第二方向Y上相邻第二镂空孔202或相邻第三镂空孔203之间的间距可参考主弯折区20a中在第二方向Y上相邻第一镂空孔201之间的间距，在此不再重复赘述。
需要说明的是，过渡弯折区20c中镂空孔的种类不限于此两种，也可设置更多种，且第二镂空孔202和第三镂空孔203的形状不限于前述实施例中提到的形状，也可为其他形状。总而言之，只需保证过渡弯折区20c中的开孔占比小于主弯折区20a中的开孔占比即可。
在一些实施例中，主弯折区20a在第二方向Y上的尺寸与过渡弯折区20c在第二方向Y上的尺寸可根据弯折的形状和弯折半径而定。具体地，在支撑背板20弯折呈水滴形时，主弯折区20a在第二方向Y上的尺寸与过渡弯折区20c在第二方向Y上的尺寸具体可根据弯折半径而定；举例而言，在水滴形支撑背板20的弯折半径为3mm时，对应主弯折区20a在第二方向Y上的尺寸为9.3mm至9.6mm，比如：9.3mm、9.4mm、9.5mm、9.6mm等等，过渡弯折区20c在第二方向Y上的尺寸为11.4mm至11.8mm，比如：11.4mm、11.5mm、11.6mm、11.7mm、11.8mm等等；在水滴形支撑背板20的弯折半径为4mm时，对应主弯折区20a在第二方向Y上的尺寸为12.4mm至12.7mm，比如：12.4mm、12.5mm、12.6mm、12.7mm等等，过渡弯折区20c在第二方向Y上的尺寸为15.2mm至15.6mm，比如：15.2mm、15.3mm、15.4mm、15.5mm、15.6mm等等。
本公开一实施例还提供了一种显示装置，如图3所示，其可包括：柔性显示面板30及前述任一实施例所描述的支撑背板20，该支撑背板20设置在柔性显示面板30的一侧。举例而言，此柔性显示面板30可为OLED(Organic Light-Emitting Diode，有机发光二极管)显示。
在一些实施例中，该显示装置还可包括缓冲胶层40，其粘合在支撑背板20与柔性显示面板30之间；在本公开的实施例中，通过设置缓冲胶层40在实现支撑背板20与柔性显示面板30之间的粘合的同时，还可 起到吸收错动以及缓冲作用。
可选地，该缓冲胶层40可为泡棉胶层，即：缓冲胶层40采用泡棉胶制作而成，这样可提高缓冲胶层40的缓冲性能和恢复形变性能，此外，还可解决支撑背板20与柔性显示面板30贴合过程中的模印问题，以及还可增强显示装置的回弹能力和整机平整度。
可选地，缓冲胶层40的厚度可为100μm至200μm，比如：100μm、120μm、140μm、160μm、180μm、200μm等等。
在本公开的实施例总，显示装置的具体类型不受特别的限制，本领域常用的显示装置类型均可，具体例如OLED显示器、手机等移动装置、手表等可穿戴设备、VR(Virtual Reality，虚拟现实)装置等等，本领域技术人员可根据该显示设备的具体用途进行相应地选择，在此不再赘述。
需要说明的是，该显示装置除了柔性显示面板30和支撑背板20以外，还包括其他必要的部件和组成，以显示器为例，具体例如外壳、电路板、电源线，等等，本领域善解人意可根据该显示装置的具体使用要求进行相应地补充，在此不再赘述。
本领域技术人员在考虑说明书及实践这里公开的实用新型后，将容易想到本公开的其它实施方案。本公开旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由所附的权利要求指出。

Claims (10)

  1. 一种支撑背板，设置在柔性显示面板的一侧，所述支撑背板至少包括主弯折区，所述主弯折区对应的弯折轴线在第一方向上延伸；且所述主弯折区开设有多个第一镂空孔，多个所述第一镂空孔在所述第一方向上和与所述第一方向正交的第二方向上阵列排布；且各所述第一镂空孔具有第一中间孔区和位于所述第一中间孔区在所述第一方向上两侧的第一弧形孔区；其中，
    沿着所述第一中间孔区与所述第一弧形孔区相接的位置所述第一中间孔区的中心位置的方向上，所述第一中间孔区在所述第二方向上的尺寸逐渐减小，所述第二方向与所述第一方向正交。
  2. 根据权利要求1所述的支撑背板，其中，所述第一中间孔区在所述第二方向上相对的两轮廓线均呈弧形；且所述第一弧形孔区为半圆形孔区；
    其中，所述第一镂空孔关于自身在所述第一方向上的中心线呈对称设置。
  3. 根据权利要求2所述的支撑背板，其中，在所述第二方向上相邻的所述第一镂空孔错位设置。
  4. 根据权利要求3所述的支撑背板，其中，
    所述第一弧形孔区的直径为0.1mm至0.4mm；
    所述第一中间孔区在所述第一方向上的尺寸为2mm至7mm，所述第一中间孔区在所述第二方向上的最大尺寸与所述第一弧形孔区的直径相同，所述第一中间孔区在所述第二方向上的最小尺寸为0.05mm至0.35mm，且所述第一中间孔区的弧形轮廓线的曲率半径为10mm至50mm。
  5. 根据权利要求4所述的支撑背板，其中，
    在所述第一方向上相邻第一镂空孔之间的间距为0.05mm至0.3mm；
    在所述第二方向上相邻第一镂空孔之间的错位尺寸为1mm至4mm；
    在所述第二方向上相邻第一镂空孔的所述中心线之间的间距为0.2mm至0.5mm。
  6. 根据权利要求2所述的支撑背板，其中，所述支撑背板还包括位 于所述主弯折区在所述第二方向上相对两侧的过渡弯折区，所述过渡弯折区上开设有多个镂空孔；
    其中，所述过渡弯折区中多个镂空孔的总面积与所述过渡弯折区的总面积之间的比值小于所述主弯折区中多个第一镂空孔的总面积与所述主弯折区的总面积之间的比值。
  7. 根据权利要求6所述的支撑背板，其中，所述过渡弯折区的多个镂空孔至少包括第二镂空孔，所述第二镂空孔设置有多个，并在所述第一方向上和所述第二方向上阵列排布，且在所述第二方向上相邻的所述第二镂空孔错位设置；其中，
    所述第二镂空孔具有第二中间孔区和位于所述第二中间孔区在所述第一方向上两侧的第二弧形孔区；所述第二弧形孔区的形状、大小与所述第一弧形孔区的形状、大小相同；所述第二中间孔区的形状呈矩形，或所述第二中间孔区在所述第二方向上相对的两轮廓线均呈弧形；且所述第二中间孔区在所述第一方向上的尺寸小于所述第一中间孔区在所述第一方向上的尺寸。
  8. 根据权利要求7所述的支撑背板，其中，所述过渡弯折区的多个镂空孔还包括第三镂空孔，所述第三镂空孔位于在所述第一方向上相邻第二镂空孔之间；其中，
    所述第三镂空孔为圆孔，且所述第三镂空孔的直径与所述第一弧形孔区的直径相同。
  9. 一种显示装置包括：柔性显示面板及权利要求1至8中任一项所述的支撑背板，所述支撑背板设置在所述柔性显示面板的一侧。
  10. 根据权利要求9所述的显示装置，其中，还包括泡棉胶层，所述泡棉胶层粘合在所述支撑背板与所述柔性显示面板之间。
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