Flexible support plate and display device

Abstract

The present disclosure relates to a flexible support plate and a display device, and belongs to the field of display technology. The flexible support plate includes a first support plate. The first support plate has a first plane area and a sliding area that are connected. The first support plate includes a whole plate-like structure located in the first plane area and a plate-like structure located in the sliding area and having a plurality of hollows. In the sliding area, the proportion of the total area of ​​the hollows per unit area decreases monotonically along the first direction, so that the ability of the flexible support plate to absorb stress and strain decreases monotonically along the first direction, and the first direction is the direction from the first plane area to the sliding area. In the process of sliding or bending of the flexible support plate, the more easily the flexible support plate is damaged, the stronger the ability of the flexible support plate to absorb stress and strain is, thereby reducing the possibility of damage to the flexible support plate.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a flexible support plate and a display device. Background Art

[0002] The scrolling screen is a new type of display screen. Users can adjust the screen size of the scrolling screen steplessly according to actual needs.

[0003] In the related art, the scrolling screen includes a flexible support plate and a display module, and the flexible support plate supports the display module to ensure the appearance of the scrolling screen. The scrolling screen has a flat display area and a scrolling display area, and the scrolling screen can be bent at different positions of the scrolling display area. When the display screen of the scrolling screen needs to be enlarged, the scrolling display area is switched from a bent state to a flat state, so that the surface of the scrolling display area is in the same plane as the surface of the flat display area, so as to increase the screen size of the scrolling screen and meet the viewing needs. When the display screen of the scrolling screen needs to be reduced, the scrolling screen is bent in the scrolling display area, so that the scrolling display area slides to the back of the flat display area, reducing the screen size of the scrolling screen, and making the scrolling screen more portable. Summary of the invention

[0004] The embodiments of the present disclosure provide a flexible support plate and a display device, which reduce the stress and strain of the flexible support plate during the rolling process. The technical solution is as follows:

[0005] On the one hand, the present disclosure provides a flexible support plate, which includes a first support plate, wherein the first support plate has a connected first plane area and a sliding area; the first support plate includes a whole plate-like structure located in the first plane area and a plate-like structure located in the sliding area and having multiple hollows; in the sliding area, the proportion of the total area of ​​the hollows per unit area decreases monotonically along a first direction, so that the ability of the flexible support plate to absorb stress and strain in the sliding area decreases monotonically along the first direction, and the first direction is the direction from the first plane area to the sliding area.

[0006] In one implementation of the embodiment of the present disclosure, the first support plate includes a first boundary support bar, a second boundary support bar, and a plurality of support bars located in the sliding area, one end of the first boundary support bar and the second boundary support bar are connected to the first side edge of the entire panel-like structure, and the first boundary support bar and the second boundary support bar both extend along the first direction, the other end of the first boundary support bar and the other end of the second boundary support bar are connected through the second side edge of the connecting plate, and the plurality of support bars are connected between the first boundary support bar and the second boundary support bar, thereby defining the plurality of hollows.

[0007] In an implementation of the embodiment of the present disclosure, the multiple support bars include multiple first support bars and multiple second support bars; the multiple first support bars are parallel to each other, and the two ends of the first support bars are respectively connected to the first boundary support bar and the second boundary support bar, and along the first direction, the distance between two adjacent first support bars decreases monotonically; any two adjacent first support bars are connected with some of the multiple second support bars, thereby defining the multiple hollows.

[0008] In an implementation of the embodiment of the present disclosure, a plurality of second support bars connected between any two adjacent first support bars are divided into a plurality of first unit structures arranged along a second direction, and any first unit structure includes a first section, a second section, a third section, a fourth section and a fifth section, wherein the first section is located between two adjacent first support bars and extends along the second direction, one end of the first section is connected to two adjacent first support bars through the second section and the third section respectively, and the second end of the first section is connected to two adjacent first support bars through the fourth section and the fifth section respectively; in the second direction, in two adjacent first unit structures, the fourth section of one first unit structure and the second section of another first unit structure are connected to the same point of the same first support bar, and the fifth section of one first unit structure and the third section of another first unit structure are connected to the same point of the same first support bar; wherein the second direction is the extension direction of the sliding shaft when the sliding area slides, the second direction is perpendicular to the first direction, and the first section to the fifth section are each a second support bar.

[0009] In an implementation of the embodiment of the present disclosure, in any of the first unit structures, the first section, the second section, the fourth section, and the first support bar connected between the second section and the fourth section form an isosceles trapezoidal hollow; in any of the first unit structures, the first section, the third section, the fifth section, and the first support bar connected between the third section and the fifth section form another isosceles trapezoidal hollow;

[0010] The hollowed-out isosceles trapezoids of two adjacent first unit structures in the second direction share a common bottom edge, and the two isosceles trapezoids with a common bottom edge are axially symmetrically distributed with the first supporting bar to which the bottom edge belongs as an axis.

[0011] In an implementation of the embodiment of the present disclosure, the angle between the first segment and the second segment is between 120 degrees and 175 degrees.

[0012] In an implementation of the embodiment of the present disclosure, a plurality of second support bars connected between any two adjacent first support bars are divided into a plurality of second unit structures arranged along a second direction, and any second unit structure includes a sixth segment, a seventh segment, an eighth segment, and a ninth segment, one end of the sixth segment, one end of the seventh segment, one end of the eighth segment, and one end of the ninth segment are connected at the same point, the other end of the sixth segment and the other end of the seventh segment are connected to one of the two adjacent first support bars, and the other end of the eighth segment and the other end of the ninth segment are connected to the other of the two adjacent first support bars; in the second direction, in two adjacent second unit structures, the other end of the seventh segment of one second unit structure and the other end of the sixth segment of the other second unit structure are connected to the same point of the same first support bar, and the other end of the ninth segment of one second unit structure and the other end of the eighth segment of the other second unit structure are connected to the same point of the same first support bar; wherein the second direction is the extension direction of the sliding shaft when the sliding area slides, the second direction is perpendicular to the first direction, and the sixth to ninth segments are respectively a second support bar.

[0013] In an implementation of the embodiment of the present disclosure, in any of the second unit structures, the sixth segment, the seventh segment and the first support bar connected between the sixth segment and the seventh segment form a hollow in the shape of an isosceles triangle; in any of the second unit structures, the eighth segment, the ninth segment and the first support bar connected between the eighth segment and the ninth segment form another hollow in the shape of an isosceles triangle; the hollows of two adjacent isosceles triangles in two adjacent second unit structures in the second direction share a common base, and the two isosceles triangles with the common base are axially symmetrically distributed with the first support bar to which the base belongs as the axis.

[0014] In one implementation of the embodiment of the present disclosure, the angle between the sixth segment and the seventh segment is between 10 degrees and 170 degrees.

[0015] In one implementation of the embodiment of the present disclosure, the multiple support bars are parallel to each other, the two ends of the support bar are respectively connected to the first boundary support bar and the second boundary support bar, and along the first direction, the distance between two adjacent support bars decreases monotonically; the area between two adjacent support bars is a hollow.

[0016] In an implementation of the embodiment of the present disclosure, the width of the support bar is between 50 micrometers and 350 micrometers.

[0017] In an implementation of the embodiment of the present disclosure, along a second direction, the total area of ​​the hollowing out within a unit area accounts for an equal proportion, the second direction is the extension direction of the sliding axis when the sliding area slides, and the second direction is perpendicular to the first direction.

[0018] In an implementation of the embodiment of the present disclosure, the first support plate is a titanium plate or an alloy plate.

[0019] In an implementation of the embodiment of the present disclosure, the thickness of the first support plate is between 100 micrometers and 500 micrometers.

[0020] In an implementation of the embodiment of the present disclosure, the flexible support plate further includes: a second support plate, the second support plate being a whole flat plate structure; and an adhesive layer bonded between the first support plate and the second support plate.

[0021] In an implementation of the embodiment of the present disclosure, the thickness of the second support plate is between 20 micrometers and 100 micrometers; the thickness of the adhesive layer is between 10 micrometers and 300 micrometers.

[0022] In an implementation of the embodiment of the present disclosure, part of the adhesive layer is located in the hollows, and the ratio of the volume of the hollows in any hollow to the total volume of the hollows is between 10% and 20%.

[0023] On the other hand, the present disclosure provides a display device, comprising the flexible support plate described in any one of the above aspects and a display module located on the flexible support plate.

[0024] The technical solution provided by the embodiments of the present disclosure has the following beneficial effects:

[0025] During the sliding or bending process of the sliding area of ​​the flexible support plate, since the stress at the sliding axis is the largest, and the number of sliding times of the flexible support plate close to the first plane area in the sliding area is relatively large, the closer to the first plane area in the sliding area, the easier it is to damage the first support plate. By setting the hollow area per unit area to be monotonically decreasing, that is, along the first direction, the porosity of the first support plate is monotonically decreasing, so that along the first direction, the ability of the flexible support plate in the sliding area to absorb stress and strain gradually decreases, then in the sliding area, the closer to the first plane area, the stronger the ability of the first support plate to absorb stress and strain. During the sliding or bending process of the flexible support plate, the more easily damaged the flexible support plate is, the stronger the ability of the flexible support plate to absorb stress and strain is, thereby reducing the possibility of damage to the flexible support plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 is a top view of a sliding roll-up screen in a fully unfolded state provided by an embodiment of the present disclosure;

[0028] Figure 2 is a cross-sectional view of a sliding roll screen in a fully unfolded state provided by an embodiment of the present disclosure;

[0029] Figure 3 is a top view of a rolling screen in a rolling state provided by an embodiment of the present disclosure;

[0030] Figure 4 is a cross-sectional view of a rolling screen in a rolling state provided by an embodiment of the present disclosure;

[0031] Figure 5 is a structural schematic diagram of a rolling screen in a rolling state provided by an embodiment of the present disclosure;

[0032] Figure 6 is a top view of a rolling screen in a rolling state provided by an embodiment of the present disclosure;

[0033] Figure 7 is a cross-sectional view of a rolling screen in a rolling state provided by an embodiment of the present disclosure;

[0034] Figure 8 is a top view of a flexible support plate provided by an embodiment of the present disclosure;

[0035] Fig. 9 is a top view of a flexible support plate provided by an embodiment of the present disclosure;

[0036] Fig.10 is a top view of another flexible support plate provided by an embodiment of the present disclosure;

[0037] Fig.11 is a top view of a flexible support plate provided by an embodiment of the present disclosure;

[0038] Fig.12 is a top view of another flexible support plate provided by an embodiment of the present disclosure;

[0039] Fig.13 is a cross-sectional schematic diagram of a flexible support plate provided by an embodiment of the present disclosure;

[0040] Fig.14is a manufacturing flow chart of a flexible support plate provided by an embodiment of the present disclosure;

[0041] Fig.15 It is a cross-sectional schematic diagram of a display device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0043] Figure 1 FIG. 1 is a top view of a fully unfolded sliding screen provided by an embodiment of the present disclosure. Figure 1 The scrolling screen has a connected plane display area 1 and a scrolling display area 2. When the scrolling screen is unfolded, the plane display area 1 and the scrolling display area 2 are in the same plane and display the picture together. At this time, the display area of ​​the scrolling screen is the largest.

[0044] Figure 2 is a cross-sectional view of a sliding roll screen in a fully unfolded state provided by an embodiment of the present disclosure. Figure 2 The rolling screen includes a flexible support plate 300 and a display module 400 located on the flexible support plate 300 , and the flexible support plate 300 is used to support the display module 400 of the rolling screen.

[0045] When the scrolling screen is fully unfolded, the display surfaces of the display modules 400 in the plane display area 1 and the scrolling display area 2 are both in the display plane. During the scrolling process of the scrolling screen, the bending states of the flexible support plate 300 and the display module 400 are synchronized, and accordingly, the flexible support plate 300 also has a plane area and a scrolling area. The plane area of ​​the flexible support plate 300 is opposite to the plane display area 1 of the scrolling screen, and the scrolling area of ​​the flexible support plate 300 is opposite to the scrolling display area 2 of the scrolling screen.

[0046] Figure 3 1 is a top view of a rolling screen in a rolling state provided by an embodiment of the present disclosure. Figure 3 In the process of sliding the scroll screen, the scroll display area 2 slides to the back side of the flat display area 1. At this time, the scroll display area 2 and the flat display area 1 are on different surfaces. Figure 3 Only the border of scroll display area 2 can be seen. Figure 1 Compared with the scrolling screen shown in FIG. 1 , the width of the display screen of the scrolling screen is narrower, and the size of the scrolling screen surface is reduced. When the scrolling screen is scrolled to the junction of the scrolling axis at the scrolling display area 2 and the flat display area 1, the size of the scrolling screen surface is the smallest.

[0047] In the embodiment of the present disclosure, the scroll axis is a central axis around which the curved portion of the scrolling display area 2 rotates when the scrolling display area 2 is scrolled.

[0048] In one implementation, the central axis may be a virtual axis and does not actually exist in the scrolling screen.

[0049] Figure 4 2 is a cross-sectional view of a rolling screen provided by an embodiment of the present disclosure when it is bent. Figure 4 When the roll-up screen is rolled up, due to the different curvatures of different film layers and the different lengths of the curved portions C, the boundaries of different film layers in the roll-up screen are uneven at the end away from the flat display area 1 and present a step shape.

[0050] Figure 5 is a structural schematic diagram of a scroll screen in a scrolling state provided by an embodiment of the present disclosure. Figure 5 In the sliding state, the sliding display area 2 slides to the back side of the flat display area 1.

[0051] Figure 6 1 is a top view of a rolling screen in a rolling state provided by an embodiment of the present disclosure. Figure 6 , a part of the scrolling display area 2 is still on the same plane as the plane display area 1. Figure 6 Part of the scroll display area 2 can be seen in Figure 3 Compared with the scroll screen shown, Figure 6 The width of the display screen of the scrolling screen shown in the figure becomes wider, and the size of the scrolling screen surface increases. Figure 1 Compared with the scroll screen shown, Figure 6 The width of the display screen of the scrolling screen is shown to be narrowed, and the size of the scrolling screen surface is reduced.

[0052] Figure 7 is a cross-sectional view of a rolling screen in a rolling state provided by an embodiment of the present disclosure. Figure 7 , the sliding display area 2 is not completely slid to the back side of the flat display area 1. Figure 4 and Figure 7 When the scrolling screen is scrolled to the side away from the plane display area 1, the scroll axis of the scrolling screen also moves to the side away from the plane display area 1. The wider the width of the display screen of the scrolling screen is, the farther the scroll axis is from the plane display area 1.

[0053] Combination Figures 1 to 7 The display module 400 and the flexible support plate 300 in the flat display area 1 are always in a flat state, while the display module 400 and the flexible support plate 300 in the sliding display area 2 can change the bending state by sliding.

[0054] In order to reduce the stress and strain of the rolling screen when rolling, the embodiment of the present disclosure provides a flexible support plate. Optionally, in the embodiment of the present disclosure, the flexible support plate is a single-layer structure or a multi-layer structure.

[0055] Figure 8 FIG. 1 is a top view of a flexible support plate provided by an embodiment of the present disclosure. Figure 8 In the embodiment, the flexible support plate is a single-layer structure. Figure 8 As shown, the flexible support plate 300 includes a first support plate 10. The first support plate 10 has a first plane area 11 and a sliding area 12 connected to each other. The first support plate 10 includes a whole plate-like structure 13 located in the first plane area 11 and a plate-like structure located in the sliding area 12 and having a plurality of hollows 14. In the sliding area 12, the proportion of the total area of ​​the hollows 14 per unit area decreases monotonically along the first direction a, so that the ability of the flexible support plate to absorb stress and strain in the sliding area 12 decreases monotonically along the first direction a. The first direction a is the direction from the first plane area 11 to the sliding area 12, that is, the first direction a is the direction away from the first plane area 11 in the arrangement direction of the first plane area 11 and the sliding area 12.

[0056] In the embodiment of the present disclosure, the proportion of the total area of ​​the hollows 14 in the unit area decreases monotonically along the first direction a, which means that the sliding area 12 is divided into a plurality of first sub-areas arranged side by side along the first direction a, and the areas of the plurality of first sub-areas are equal, and the unit area is the area of ​​each first sub-area. Along the first direction a, the proportion of the total area of ​​the hollows 14 in the first first sub-area is the largest, the proportion of the total area of ​​the hollows 14 in the second first sub-area is less than the proportion of the total area of ​​the hollows 14 in the first first sub-area, the proportion of the total area of ​​the hollows 14 in the third first sub-area is less than the proportion of the total area of ​​the hollows 14 in the second first sub-area, and so on.

[0057] During the sliding or bending process of the sliding area of ​​the flexible support plate, since the stress at the sliding axis is the largest, and the number of sliding times of the flexible support plate close to the first plane area in the sliding area is relatively large, the closer to the first plane area in the sliding area, the easier it is to damage the first support plate. By setting the hollow area per unit area to be monotonically decreasing, that is, along the first direction, the porosity of the first support plate is monotonically decreasing, so that along the first direction, the ability of the flexible support plate in the sliding area to absorb stress and strain gradually decreases, then in the sliding area, the closer to the first plane area, the stronger the ability of the first support plate to absorb stress and strain. During the sliding or bending process of the flexible support plate, the more easily damaged the flexible support plate is, the stronger the ability of the flexible support plate to absorb stress and strain is, thereby reducing the possibility of damage to the flexible support plate.

[0058] The first plane area 11 is opposite to the plane display area 1 of the scrolling screen, and the scrolling area 12 is opposite to the scrolling display area 2 of the scrolling screen.

[0059] It can be seen from the experimental verification that, in the process of the scrolling screen rolling up, the stress and strain at the scrolling axis in the scrolling display area is the largest, and the stress and strain at the scrolling axis gradually decreases during the movement of the scrolling axis along the first direction a. In addition, when the scrolling axis slides to any position, the stress and strain of the scrolling screen along the first direction a starting from the scrolling axis is monotonically decreasing.

[0060] During the use of the rolling screen, the closer the sliding area 12 is to the first plane area 11 , the more times it slides and the greater the accumulated stress and strain are, so that the closer the first support plate is to the first plane area 11 , the easier it is to be damaged.

[0061] Therefore, when the first support plate closer to the first plane area 11 in the sliding area 12 has a stronger ability to absorb stress and strain, the damage of the first support plate can be well improved.

[0062] In an implementation of the embodiment of the present disclosure, along the second direction b, the proportion of the total area of ​​the hollows 14 within a unit area is equal, and the second direction b is the extension direction of the sliding shaft when the sliding area 12 slides.

[0063] In the disclosed embodiment, during the rolling of the flexible support plate, the stress and strain of the first support plate 10 are constant in the second direction b. In the second direction b, the total area of ​​the hollows 14 per unit area is equal, which facilitates the manufacture of the first support plate 10.

[0064] In the embodiment of the present disclosure, the equal proportion of the total area of ​​the hollows 14 within the unit area along the second direction b means that the sliding area 12 is divided into a plurality of second sub-areas arranged side by side along the second direction b, and the areas of the plurality of second sub-areas are equal, and the unit area is the area of ​​each second sub-area. Along the second direction b, the total area of ​​the hollows 14 in each second sub-area has an equal proportion.

[0065] In the disclosed embodiment, the first support plate 10 has support and flexibility in both the first planar region 11 and the sliding region 12. Since the first planar region 11 is a whole panel-like structure 13 without hollowing, the first planar region 11 has better strength and support than the sliding region 12. The sliding region 12 has hollowing 14, and the sliding region 12 has better ability to absorb stress and strain and better flexibility than the first planar region 11.

[0066] See again Figure 8The first support plate 10 includes a first boundary support bar 101, a second boundary support bar 102 and a plurality of support bars 103 located in the sliding area 12, one end of the first boundary support bar 101 and the second boundary support bar 102 are connected to the first side 15 of the entire panel-like structure 13, and the first boundary support bar 101 and the second boundary support bar 102 both extend along the first direction a, the other end of the first boundary support bar 101 and the other end of the second boundary support bar 102 are connected through the second side 17 of the connecting plate 16, and the plurality of support bars 103 are connected between the first boundary support bar 101 and the second boundary support bar 102, thereby defining a plurality of hollows 14.

[0067] The first support plate 10 in the sliding area 12 is edge-sealed by the first boundary support bar 101 and the second boundary support bar 103, thereby reducing the possibility of cracking of the first support plate 10 in the sliding area 12. At the same time, the first boundary support bar 101 and the second boundary support bar 102 support the plurality of support bars 103, thereby improving the support performance of the support bars 103.

[0068] See again Figure 8 The first support plate 10 also has a second plane area 18, and the second plane area 18 is connected to the sliding area 12. Along the first direction a, the sliding area 12 is located between the first plane area 11 and the second plane area 18. The connecting plate 16 is a whole panel-like structure of the second plane area 18, that is, both sides of the sliding area 12 are whole panel-like structures. On the one hand, during the sliding process of the flexible support plate, the flexible support plate can be slid with the connecting plate 16 and the whole panel-like structure 13 as support. On the other hand, the whole panel-like structure 13 and the connecting plate 16 can connect the multiple support bars 103 located in the sliding area 12 to the first side 15 of the whole panel-like structure 13 and the second side 17 of the connecting plate 16. The first side 15 and the second side 17 are opposite to each other, and the support bar 103 is supported, which can improve the support of the support bar 103.

[0069] In the disclosed embodiment, the scrolling screen further includes a support area 3, which is opposite to the second plane area 18. The support area 3 is mainly used to support the other side of the scrolling display area 2 during the scrolling process and slide along with the other side of the scrolling display area 2.

[0070] In some examples, the support area 3 is located at the back side of the planar display area 1 and does not display any image.

[0071] exist Figure 8 In order to clearly show the structure of the first support plate 10 , in the top view, the second plane area 18 , the first plane area 11 and the sliding area 12 are all in the same plane.

[0072] See again Figure 8 The first boundary support strip 101 , the second boundary support strip 102 , the first side edge 15 and the second side edge 17 form four boundaries of the sliding area 12 .

[0073] In the embodiment of the present disclosure, the orthographic projection of the first planar area 11 on the first plane, the orthographic projection of the sliding and rolling area 12 on the first plane, and the orthographic projection of the second planar area 18 on the first plane are all rectangular, wherein the first plane is parallel to the surface of the entire panel structure 13. That is, the boundary of the first planar area 11, the boundary of the sliding and rolling area 12, and the boundary of the second planar area 18 are all straight lines.

[0074] In other implementations, the boundaries of the first planar region 11, the sliding region 12, and the second planar region 18 may also be curves. In this case, the length of the support bar 103 in the sliding region 12 may be adaptively modified, and the structure of the support bar 103 may remain unchanged.

[0075] See again Figure 8 The entire panel-like structure 13 also has a third side 19, a fourth side 110 and a fifth side 111. The third side 19 is opposite to the first side 15, one end of the third side 19 is connected to one end of the first side 15 through the fourth side 110, and the other end of the third side 19 is connected to the other end of the first side 15 through the fifth side 111. The fourth side 110 is collinear with the first boundary support bar 101, and the fifth side 111 is collinear with the second boundary support bar 102. The first side 15 is the boundary between the first plane area 11 and the sliding area 12.

[0076] See again Figure 8 , the connecting plate 16 further has a sixth side 112, a seventh side 113 and an eighth side 114. The sixth side 112 is opposite to the second side 17, one end of the sixth side 112 is connected to one end of the second side 17 through the seventh side 113, and the other end of the sixth side 112 is connected to the other end of the second side 17 through the eighth side 114. The seventh side 113 is collinear with the first boundary support bar 101, and the eighth side 114 is collinear with the second boundary support bar 102. The second side 17 is the boundary between the second plane area 18 and the sliding area 12.

[0077] See again Figure 8 The plurality of support bars 103 include a plurality of first support bars 131 and a plurality of second support bars 132. The plurality of first support bars 131 are parallel to each other, and both ends of the first support bars 131 are connected to the first boundary support bar 101 and the second boundary support bar 102 respectively.

[0078] Along the first direction a, the distance between two adjacent first support bars 131 decreases monotonically, and the decreasing percentages of the distance between two adjacent first support bars 131 are equal. Figure 8 In the first direction a, the distance between the Nth first support bar 131 and the N+1th first support bar 131 is L1, the distance between the N+1th first support bar 131 and the N+2th first support bar 131 is L2, and the distance between the third first support bar 131 and the fourth first support bar 131 is L3, where N is a positive integer. Then:

[0079]

[0080] According to formula (1), the above is inferred.

[0081] It can be seen from formula (1) that along the first direction a, the difference in the spacing between two adjacent first support bars 131 decreases successively. In other implementations, it can also be set that the difference in the spacing between two adjacent first support bars 131 is equal, that is, the spacing between two adjacent first support bars 131 decreases arithmetic difference.

[0082] Some of the second support bars 132 are connected between any two adjacent first support bars 131, thereby defining a plurality of hollows 14. Exemplarily, the plurality of second support bars 132 are cross-connected between two adjacent first support bars 131 to form a mesh structure.

[0083] In the embodiment of the present disclosure, the hollows 14 are defined by a plurality of first support bars 131 and a plurality of second support bars 132, which ensures that there are a plurality of hollows 14 in the sliding area 12 of the first support plate 10, thereby increasing the ability of the first support plate 10 to absorb stress and strain in the sliding area 12, and at the same time ensures that the first support plate 10 has a certain supporting force in the sliding area 12. Since the spacing between two adjacent first support bars 131 decreases monotonically, the total area of ​​the hollows 14 per unit area along the first direction a decreases monotonically, so that the ability of the flexible support plate to absorb stress and strain along the first direction a gradually decreases.

[0084] See again Figure 8, the multiple second support bars 132 connected between any two adjacent first support bars 131 are divided into a plurality of first unit structures A arranged along the second direction b, and any first unit structure A includes a first section 1321, a second section 1322, a third section 1323, a fourth section 1324 and a fifth section 1325, the first section 1321 is located between two adjacent first support bars 131 and extends along the second direction b, one end of the first section 1321 is connected to the two adjacent first support bars 131 through the second section 1322 and the third section 1323, respectively, and the second end of the first section 1321 is connected to the two adjacent first support bars 131 through the fourth section 1324 and the fifth section 1325, respectively.

[0085] In the second direction b, in any two adjacent first unit structures A, the fourth section 1324 of one first unit structure A and the second section 1322 of the other first unit structure A are connected to the same point of the same first support bar 131, and the fifth section 1325 of one first unit structure A and the third section 1323 of the other first unit structure A are connected to the same point of the same first support bar 131. The second direction is the extension direction of the sliding axis when the sliding area 12 slides, the second direction b is perpendicular to the first direction a, and the first section 1321 to the fifth section 1325 are each a second support bar 132.

[0086] In the embodiment of the present disclosure, the first section 1321 between two adjacent first support bars 131 is located between the two adjacent first support bars 131 and extends along the second direction b, and one end of the first section 1321 is connected to the two adjacent first support bars 131 through the second section 1322 and the third section 1323, respectively, then the extension directions of the second section 1322 and the third section 1323 both intersect with the second direction b. Similarly, the extension directions of the fourth section 1324 and the fifth section 1325 both intersect with the second direction b. Compared with directly arranging the second section 1322, the third section 1323, the fourth section 1324 and the fifth section 1325 along the second direction b, the total length of the second section 1322, the third section 1323, the fourth section 1324 and the fifth section 1325 can be increased, and the area of ​​the hollowing out 14 between two adjacent first support bars 131 can be reduced, thereby increasing the support of the first support plate 10 in the sliding area 12, while ensuring that there is a hollowing out 14 in the sliding area 12, and the ability of the first support plate 10 to absorb stress and strain will not be reduced.

[0087] See again Figure 8In any first unit structure A, the first section 1321, the second section 1322, the fourth section 1324 and the first support bar 131 connected between the second section 1322 and the fourth section 1324 form an isosceles trapezoidal hollow. In any first unit structure A, the first section 1321, the third section 1323, the fifth section 1325 and the first support bar 131 connected between the third section 1323 and the fifth section 1325 form another isosceles trapezoidal hollow. The two adjacent isosceles trapezoidal hollows in two adjacent first unit structures A in the second direction b share a bottom edge, and the two isosceles trapezoids with the bottom edge are axially symmetrically distributed with the first support bar 131 to which the bottom edge belongs as the axis.

[0088] In the embodiment of the present disclosure, along the first direction a, two sides of a first support bar 131 are two isosceles trapezoidal hollows arranged opposite to each other.

[0089] In the embodiment of the present disclosure, the first support bar 131 may not be arranged, that is, only the second support bar 132 is provided in the sliding area 12 , and the hollow 14 is defined by a plurality of second support bars 132 .

[0090] In one implementation of the embodiment of the present disclosure, the angle between the first segment 1321 and the second segment 1322 is between 120 degrees and 175 degrees. Similarly, the angle between the first segment 1321 and the third segment 1323 is between 120 degrees and 175 degrees; the angle between the first segment 1321 and the fourth segment 1324 is between 120 degrees and 175 degrees; the angle between the first segment 1321 and the fifth segment 1325 is between 120 degrees and 175 degrees.

[0091] In the embodiment of the present disclosure, the sum of the angle between the first segment 1321 and the second segment 1322, the angle between the first segment 1321 and the third segment 1323, and the angle between the second segment 1322 and the third segment 1323 is 360 degrees. The sum of the angle between the first segment 1321 and the fourth segment 1324, the angle between the first segment 1321 and the fifth segment 1325, and the angle between the fourth segment 1324 and the fifth segment 1325 is also 360 degrees.

[0092] If there is a support strip perpendicular to the scroll axis in the scroll area 12, the bendability of the flexible support plate in the scroll area 12 will be reduced. That is, the support strip extending along the first direction a will reduce the bendability of the flexible support plate. Since the first section 1321 extends along the second direction b, the first direction a is perpendicular to the second direction b, and the angle between the first section 1321 and the second section 1322 is between 120 degrees and 175 degrees, that is, the second section 1322 will not extend along the first direction a, then the second section 1322 will not reduce the bendability of the flexible support plate. However, the support strip extending along the first direction a can increase the supportability of the flexible support plate. Since the second section 1322 does not extend along the second direction b, that is, the second section 1322 has a component along the first direction a, the supportability of the flexible support plate can be increased.

[0093] In the embodiment of the present disclosure, along the first direction a, the angle between the first segment 1321 and the second segment 1322 in each first unit structure A is monotonically increasing. Along the second direction b, the angle between the first segment 1321 and the second segment 1322 in the first unit structure A is the same.

[0094] In the embodiment of the present disclosure, the first section 1321 provides support along the second direction b, and the second section 1322, the third section 1323, the fourth section 1324 and the fifth section 1325 can provide support along both the first direction a and the second direction b.

[0095] In the embodiment of the present disclosure, along the first direction a, the monotonically decreasing distance between two adjacent first support bars 131 complies with the rule:

[0096] c=d×(1-e) n (2)

[0097] In formula (2):

[0098] c——minimum design spacing;

[0099] d——maximum design spacing;

[0100] e——Percentage of spacing reduction;

[0101] n——the number of first support bars 131 .

[0102] In the process of manufacturing the first support plate 10, the size of the sliding area 12 can be determined first, and then the minimum design spacing c and the maximum design spacing d can be determined through simulation. Then, the number n of the first support bars 131 can be determined according to the required support of the first support plate 10. Then, the decreasing percentage e each time and the number of the first unit structures A along the second direction b can be calculated according to formula (2), and finally the angle between each section of the first unit structure A can be determined.

[0103] for Figure 8 In the first support plate 10 shown in the figure, along the first direction a, the distance between the Nth first support bar 131 and the N+1th first support bar 131 is equal to d×(1-e) N , N is a natural number and N<n. A plurality of second support bars are connected between the first first support bar 131 and the first side 15, and the plurality of second support bars 132 form an isosceles trapezoidal hollowing with the first support bar 131 as the bottom, the first side 15 as the top, and the two second support bars 132 as the waists, and the isosceles trapezoidal hollowing is symmetrical with the isosceles trapezoidal hollowing between the first first support bar 131 and the second first support bar 131 near the first plane area 11. Similarly, a plurality of second support bars are also connected between the nth first support bar 131 and the second side 17, and the plurality of second support bars 132 form an isosceles trapezoidal hollowing with the first support bar 131 as the bottom, the second side 17 as the top, and the two second support bars 132 as the waists, and the isosceles trapezoidal hollowing is symmetrical with the isosceles trapezoidal hollowing between the nth first support bar 131 and the n-1th first support bar 131 near the second plane area 16.

[0104] In the embodiment of the present disclosure, along the second direction b, the length of the first plane area 11 is between 120 mm and 200 mm. Along the first direction a, the width of the first plane area 11 is between 50 mm and 100 mm.

[0105] In the embodiment of the present disclosure, along the second direction b, the lengths of the sliding area 12 and the first plane area 11 are both between 120 mm and 200 mm. Along the first direction a, the width of the sliding area 12 is between 50 mm and 100 mm.

[0106] In the disclosed embodiment, the maximum design spacing d is between 200 microns and 500 microns. The minimum design spacing is between 50 microns and 350 microns. The spacing decreasing percentage e is between 0 and 5%, for example, the spacing decreasing percentage e in a disclosed embodiment may be 1%. The number n of the first support bars 131 is between 120 and 1200.

[0107] In the embodiment of the present disclosure, the number of the first unit structures A is between 240 and 600 along the second direction b.

[0108] Along the second direction b, each first unit structure A has the same structure and size. Since each first unit structure A is located between two adjacent first support bars 131, and each first unit structure A is connected to two adjacent first support bars 131, the width of the first unit structure A is monotonically decreasing along the first direction a. The width of the first unit structure A is the distance between the two first support bars 131 connected to the first unit structure A.

[0109] Fig. 9 It is a top view of a flexible support plate provided in an embodiment of the present disclosure. Fig. 9 and Figure 8 The difference is that in Figure 8 In the embodiment, the hollow arrangement between the first side 15 and the first first support bar 131 is different from the hollow arrangement between two adjacent first support bars 131. The trapezoidal hollow arrangement between the first side 15 and the first first support bar 131 is symmetrically distributed with the trapezoidal hollow arrangement between the first first support bar 131 and the second first support bar 131 on the side close to the first plane area 11. Fig. 9 In the embodiment, the hollow arrangement between the first side 15 and the first first support bar 131 is the same as the hollow arrangement between two adjacent first support bars 131, except that the size of the hollow between the first side 15 and the first first support bar 131 is larger.

[0110] for Fig. 9 In the first support plate 10 shown, along the first direction a, the spacing between the Nth first support bar 131 and the N+1th first support bar 131 is equal to d×(1-e)N, where N is a natural number and N<n. The spacing between the first first support bar 131 and the first side 15 is equal to d. The spacing between the nth first support bar 131 and the second side 17 is equal to d×(1-e)n.

[0111] Fig.10 It is a top view of another flexible support plate provided in an embodiment of the present disclosure. Fig.10 The flexible support plate and Figure 8 The difference between the flexible support plates is that the second unit structure B formed by the plurality of second support bars 132 between two adjacent first support bars 131 is different, and the other structures are the same.

[0112] See also Fig.10 , the multiple second support bars 132 connected between any two adjacent first support bars 131 are divided into a plurality of second unit structures B arranged along the second direction b, and any second unit structure B includes a sixth segment 1326, a seventh segment 1327, an eighth segment 1328 and a ninth segment 1329, one end of the sixth segment 1326, one end of the seventh segment 1327, one end of the eighth segment 1328 and one end of the ninth segment 1329 are connected to the same point, the other end of the sixth segment 1326 and the other end of the seventh segment 1327 are connected to one of the two adjacent first support bars 131, and the other end of the eighth segment 1328 and the other end of the ninth segment 1329 are connected to the other of the two adjacent first support bars 131.

[0113] In the second direction b, in two adjacent second unit structures B, the other end of the seventh segment 1327 of one second unit structure B and the other end of the sixth segment 1326 of the other second unit structure B are connected to the same point of the same first support bar 131, and the other end of the ninth segment 1329 of one second unit structure B and the other end of the eighth segment 1328 of the other second unit structure B are connected to the same point of the same first support bar 131. The second direction b is the extension direction of the sliding axis when the sliding area 12 slides, and the second direction b is perpendicular to the first direction a. The sixth segment 1326 to the ninth segment 1329 are each a second support bar 132.

[0114] Along the second direction b, the structure and size of each second unit structure B are the same. Similarly, the extension directions of the sixth section 1326, the seventh section 1327, the eighth section 1328 and the ninth section 1329 all intersect with the second direction b. The total length of the sixth section 1326, the seventh section 1327, the eighth section 1328 and the ninth section 1329 is increased, and the area of ​​the hollow 14 is reduced, thereby increasing the support of the first support plate 10 in the sliding area 12, and at the same time, it is ensured that there is a hollow 14 in the sliding area 12, and the ability of the first support plate 10 to absorb stress and strain will not be reduced.

[0115] See again Fig.10 In any second unit structure B, the sixth section 1326, the seventh section 1327 and the first support bar 131 connected between the sixth section 1326 and the seventh section 1327 form an isosceles triangle hollow, and the eighth section 1328, the ninth section 1329 and the first support bar 131 connected between the eighth section 1328 and the ninth section 1329 form another isosceles triangle hollow. The two adjacent isosceles triangle hollows in two adjacent second unit structures B in the second direction b share a common base, and the two isosceles triangles with a common base are axially symmetrically distributed with the first support bar 131 to which the base belongs as the axis.

[0116] In the embodiment of the present disclosure, along the first direction a, two sides of a first support bar 131 are hollowed out isosceles triangles that are arranged opposite to each other.

[0117] In one implementation of the embodiment of the present disclosure, the angle between the sixth segment 1326 and the seventh segment 1327 is between 10 degrees and 170 degrees. Similarly, the angle between the seventh segment 1327 and the eighth segment 1328 is between 10 degrees and 170 degrees; the angle between the eighth segment 1328 and the ninth segment 1329 is between 10 degrees and 170 degrees; and the angle between the ninth segment 1329 and the sixth segment 1326 is between 10 degrees and 170 degrees.

[0118] In the embodiment of the present disclosure, the sum of the angle between the sixth segment 1326 and the seventh segment 1327, the angle between the seventh segment 1327 and the eighth segment 1328, the angle between the eighth segment 1328 and the ninth segment 1329, and the angle between the ninth segment 1329 and the sixth segment 1326 is 360 degrees.

[0119] Since the sixth section 1326, the seventh section 1327, and the first support bar 131 connected between the sixth section 1326 and the seventh section 1327 form a hollow isosceles triangle, that is, the sixth section 1326 and the seventh section 1327 will not extend along the first direction a, then the sixth section 1326 and the seventh section 1327 will not reduce the bendability of the flexible support plate. At the same time, the sixth section 1326 and the seventh section 1327 will not extend along the second direction b, that is, the sixth section 1326 and the seventh section 1327 have a component along the first direction a, which can increase the support of the flexible support plate.

[0120] In the embodiment of the present disclosure, along the first direction a, the angle between the sixth segment 1326 and the seventh segment 1327 in each second unit structure B is monotonically increasing. Along the second direction b, the angle between the sixth segment 1326 and the seventh segment 1327 in the second unit structure B is the same.

[0121] In the embodiment of the present disclosure, the number of the second unit structures B is between 240 and 1000 along the second direction b.

[0122] Fig.11 It is a top view of a flexible support plate provided in an embodiment of the present disclosure. Fig.11 and Fig.10 The difference is that in Fig.10 In the embodiment, the hollow arrangement between the first side 15 and the first first support bar 131 is different from the hollow arrangement between two adjacent first support bars 131. The triangular hollow between the first side 15 and the first first support bar 131 is symmetrically distributed with the triangular hollow on the left side of the first first support bar 131 and the second first support bar 131. Fig.11 In the embodiment, the hollow arrangement between the first side 15 and the first first support bar 131 is the same as the hollow arrangement between two adjacent first support bars 131, except that the size of the hollow between the first side 15 and the first first support bar 131 is larger.

[0123] Fig.12 FIG. 1 is a top view of another flexible support plate provided by an embodiment of the present disclosure. Fig.12The plurality of support bars 103 are parallel to each other, and the two ends of the support bars 103 are respectively connected to the first boundary support bar 101 and the second boundary support bar 102, and along the first direction a, the spacing between two adjacent support bars 103 decreases monotonically. The area between two adjacent support bars 103 is a hollow 14.

[0124] For example, in Fig.12 In the illustrated embodiment, there is also a hollow between the first side 15 and the first support bar 103 in the first direction a, and there is also a hollow between the second side 17 and the last support bar in the first direction a.

[0125] Fig.12 and Figure 8 and Fig.10 The difference is that Fig.12 There is no other structure arranged between the two adjacent support bars 103, that is, Fig.12 There is only the aforementioned first support bar 131 but no second support bar 132.

[0126] Compared to Figure 8 and Fig.10 The structure, Fig.12 The first support plate is easier to manufacture and has better bendability. Fig.12 The structure, Figure 8 and Fig.10 The first support plate has better support performance, wherein, Figure 8 The number of the second support bars 132 is greater, and the area of ​​the hollow 14 in the sliding area 12 is smaller. Figure 8 The support performance of the first support plate is Fig.10 The first support plate has better supporting performance.

[0127] exist Fig.12 In the embodiment, the ratio of the maximum width of all the hollows 14 to the width of a support bar 103 is between 0.5:1 and 3:1. The area of ​​the hollows 14 in the rolling area 12 is ensured to be large enough so that the rolling area 12 has a certain degree of bending, and the number of the support bars 103 in the rolling area 12 is ensured to be sufficient so that the rolling area 12 has a certain degree of support. In the actual manufacturing process, the ratio of the width of the hollows 14 to the width of the support bars 103 can be adjusted as needed to ensure that the film layer in the rolling screen will not collapse in the rolling area 12.

[0128] In one implementation of the embodiment of the present disclosure, the width of the support bar 103 is between 50 micrometers and 350 micrometers.

[0129] For example, in Figures 8 to 11 In the example, the width of the support strip 103 is 200 microns. Fig.12In the example, the width of the support bar 103 is 300 microns. Fig.12 The width of the middle support bar 103 ensures that the sliding area 12 has a certain degree of support.

[0130] In the embodiment of the present disclosure, the first support plate 10 needs to have not only bendability but also certain supportability. The supportability of the first support plate 10 in the sliding area 12 is provided by the support bar 103, and the supportability of the first support plate 10 is controlled by controlling the width of the support bar 103. The width of the support bar 103 is limited to between 50 microns and 350 microns, which can ensure that the first support plate 10 has certain supportability and avoid the width of the support bar 103 being too large to weaken the bendability of the first support plate 10 in the sliding area 12.

[0131] In the embodiment of the present disclosure, when the area of ​​the sliding region 12 is constant, the total area of ​​the hollow 14 can be adjusted by adjusting the width of the support bar 103. The larger the width of the support bar 103, the smaller the total area of ​​the hollow 14. Conversely, the smaller the width of the support bar 103, the larger the total area of ​​the hollow 14. That is, the total area of ​​the hollow 14 is negatively correlated with the width of the support bar 103.

[0132] In the embodiment of the present disclosure, the width of the first boundary support strip 101 and the width of the second boundary support strip 102 are between 200 micrometers and 1000 micrometers.

[0133] The first boundary support bar 101 and the second boundary support bar 102 are located on both sides of the sliding area 12, supporting the support bar 103, increasing the width of the first boundary support bar 101 and the width of the second boundary support bar 102, thereby ensuring the support of the first boundary support bar 101 and the second boundary support bar 102.

[0134] In one implementation of the embodiment of the present disclosure, the first support plate 10 is a titanium plate or an alloy plate.

[0135] The titanium plate and the alloy plate not only have a certain strength to ensure the support of the first support plate 10 , but also have a certain flexibility to ensure the flexibility of the first support plate 10 .

[0136] Exemplarily, the alloy plate is a stainless steel plate.

[0137] In an implementation of the embodiment of the present disclosure, the thickness of the first support plate 10 is between 100 micrometers and 500 micrometers.

[0138] In the embodiment of the present disclosure, since the first support plate 10 has a hollow 14 in the sliding area 12, the strength and support of the first support plate 10 in the sliding area 12 are relatively weak, and the thickness of the first support plate 10 is limited to between 100 microns and 500 microns to prevent the first support plate 10 from being too thin and weakening the strength and support of the first support plate 10 in the sliding area 12, thereby causing damage to the first support plate 10.

[0139] Fig.13 is a cross-sectional schematic diagram of a flexible support plate provided by an embodiment of the present disclosure. Fig.13 The flexible support plate further includes: a second support plate 20 and an adhesive layer 30. The second support plate 20 overlaps with the first support plate 10, and the second support plate 20 is a whole flat plate structure. The adhesive layer 30 is bonded between the first support plate 10 and the second support plate 20.

[0140] In the disclosed embodiment, the flexible support plate can be used as a support for a flexible display device. Since the sliding area 12 in the first support plate 10 has a hollow 14, when other film layers in the display module of the flexible display device are superimposed on the first support plate 10, the film layer of the display module is relatively thin, and the shape of the hollow 14 will be displayed in the film layer of the display module, forming a mold imprint, which affects the viewing experience. A second support plate 20 is arranged between the first support plate 10 and the display module, and the second support plate 20 does not have a hollow. The second support plate 20 blocks the hollow 14 in the first support plate 10. After the display module is superimposed, the mold imprint generated by the hollow 14 can be eliminated. At the same time, an adhesive layer 30 is arranged to bond the first support plate 10 and the second support plate 20 to ensure the firmness of the connection between the first support plate 10 and the second support plate 20.

[0141] Moreover, the flexible support plate has two layers of support plates, namely the first support plate 10 and the second support plate 20. Compared with only one layer of support plate, the flexible support plate has a higher strength and is not easily damaged even if it falls accidentally, thereby improving the anti-falling capability of the flexible support plate.

[0142] In one implementation of the embodiment of the present disclosure, the second support plate 20 is a titanium plate or an alloy plate (such as a stainless steel plate) to ensure the support and bendability of the second support plate 20.

[0143] In the embodiment of the present disclosure, the second support plate 20 also has a plane area corresponding to the first plane area 11 of the first support plate 10, and a sliding area corresponding to the sliding area 12 of the first support plate 10. However, both the plane area and the sliding area in the second support plate 20 are whole panel structures without hollowing. During the sliding process of the flexible support plate, the sliding area of ​​the second support plate 20 also needs to be bent.

[0144] In an implementation of the embodiment of the present disclosure, the thickness of the second support plate 20 is between 20 micrometers and 100 micrometers.

[0145] In the disclosed embodiment, the thickness of the second support plate 20 is relatively thinner than that of the first support plate 10. There is no need to make hollows in the second support plate 20. At the same thickness, the strength of the second support plate 20 is greater than the thickness of the first support plate 10. The thickness of the second support plate 20 is less than that of the first support plate 10, which will not affect the second support plate 20 and can also reduce the thickness of the entire flexible support plate.

[0146] Since the bendability of the second support plate 20 is negatively correlated with the thickness of the second support plate 20 , reducing the thickness of the second support plate 20 can also ensure the bendability of the second support plate 20 .

[0147] In one implementation of the embodiment of the present disclosure, the adhesive layer is an optically clear adhesive (OCA) layer. The optical adhesive has good adhesion and ensures the firmness of the connection between the first support plate 10 and the second support plate 20.

[0148] Alternatively, in other implementations, the adhesive layer is a pressure sensitive adhesive (PSA) layer.

[0149] In the embodiment of the present disclosure, the material of the adhesive layer 30 in the first planar region 11 of the first support plate 10 and the material of the adhesive layer 30 in the sliding region 12 of the first support plate 10 may be the same or different, and the present disclosure does not limit this.

[0150] In one implementation of the embodiment of the present disclosure, the thickness of the adhesive layer 30 is between 10 micrometers and 300 micrometers.

[0151] In the embodiment of the present disclosure, the thicker the adhesive layer 30 is, the better the connection between the first support plate 10 and the second support plate 20 is, but the thickness of the flexible support plate will be increased. When the thickness of the flexible support plate is increased, the bendability of the flexible support plate will be reduced. The thickness of the adhesive layer 30 is limited to between 10 microns and 300 microns, which can ensure the connection between the first support plate 10 and the second support plate 20 and prevent the adhesive layer 30 from being too thick and affecting the bendability of the flexible support plate.

[0152] Since the first support plate 10 has a hollow, and the adhesive has a certain fluidity, in the process of making the flexible support plate, the liquid adhesive will enter the hollow 14, and after the adhesive solidifies, there will be a part of the solidified adhesive in the hollow 14, that is, the hollow 14 has an adhesive layer 30. However, the adhesive will not fill the entire hollow 14, but only a part of the hollow 14. Therefore, in the embodiment of the present disclosure, part of the adhesive layer 30 is located in the hollow 14, and the ratio of the volume of the adhesive layer 30 in any hollow 14 to the total volume of the hollow 14 is between 10% and 20%.

[0153] The disclosed embodiment also provides a method for manufacturing a flexible support plate. Fig.14 FIG. 1 is a flow chart of manufacturing a flexible support plate provided by an embodiment of the present disclosure. Referring to FIG. 1 , the method includes:

[0154] In step S1 , a first support plate is provided, wherein the first support plate has a first plane area and a sliding area connected to each other.

[0155] In the disclosed embodiment, the first support plate is a titanium plate or an alloy plate. The titanium plate and the alloy plate not only have a certain strength to ensure the support of the first support plate, but also have a certain flexibility to ensure the flexibility of the first support plate.

[0156] In step S2, a plurality of hollows arranged at intervals are made on the sliding area of ​​the first support plate, so that the first support plate includes a whole plate-like structure located in the first plane area and a plate-like structure located in the sliding area and having a plurality of hollows. In the sliding area, the proportion of the total area of ​​the hollows per unit area decreases monotonically along a first direction, so that the ability of the flexible support plate to absorb stress and strain in the sliding area decreases monotonically along the first direction, and the first direction is the direction from the first plane area to the sliding area.

[0157] In the disclosed embodiment, the sliding area of ​​the first support plate can be patterned by processes such as gluing, masking, exposing, developing, and etching through a mask plate, so that the sliding area of ​​the first support plate is hollowed out.

[0158] See again Fig.14 , the method further comprises:

[0159] In step S3, an adhesive layer is applied on the second support plate.

[0160] In the disclosed embodiment, liquid adhesive is applied on the second supporting plate.

[0161] In the disclosed embodiment, the second support plate is a titanium plate or an alloy plate. The bonding layer is an optical adhesive layer or a photosensitive adhesive layer.

[0162] In step S4, the second support plate and the first support plate are bonded together by an adhesive layer.

[0163] In the disclosed embodiment, the first support plate that has been manufactured is attached to the liquid adhesive, and after the liquid adhesive solidifies, an adhesive layer is formed to bond the second support plate and the first support plate together.

[0164] The present disclosure also provides a display device, which includes Figures 8 to 13 A flexible support plate and a display module located on the support plate as shown in any of the accompanying drawings.

[0165] Fig.15 is a cross-sectional schematic diagram of a display device provided by an embodiment of the present disclosure. Fig.15 The display device includes a display module 400 and a cover plate 500 sequentially stacked on a flexible support plate 300. The display module 400 includes a functional layer 4001 and a key layer 4002.

[0166] The functional layer 4001 has structures that provide optical and touch functions, such as polarizers and touch units. The key layer 4002 has a light-emitting layer and a circuit layer for light-emitting display of the display device. The cover plate 500 protects the display module 400.

[0167] Exemplarily, the cover plate 500 is a flexible cover plate to ensure the bendability of the display device.

[0168] The display device provided in the embodiment of the present disclosure can be a liquid crystal display (LCD) device or an organic light-emitting diode (OLED) display device. In specific implementation, the display device provided in the embodiment of the present disclosure can be any product or component with display function and scrolling function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc.

[0169] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A flexible support plate, characterized in that: The flexible support plate comprises a first support plate (10), the first support plate (10) having a first plane area (11), a sliding area (12) and a second plane area (18) which are connected, and the sliding area (12) is located between the first plane area (11) and the second plane area (18); The first support plate (10) comprises a whole plate-like structure (13) located in the first plane area (11), a plate-like structure located in the sliding area (12) and having a plurality of hollows (14), and a connecting plate (16) located in the second plane area (18); in the sliding area (12), the proportion of the total area of ​​the hollows (14) per unit area decreases monotonically along a first direction, so that the ability of the flexible support plate to absorb stress and strain in the sliding area (12) decreases monotonically along the first direction, and the first direction is the direction from the first plane area (11) to the sliding area (12); The first support plate (10) comprises a first boundary support bar (101), a second boundary support bar (102) and a plurality of support bars (103) located in the sliding area (12); one end of the first boundary support bar (101) and the second boundary support bar (102) are connected to a first side edge (15) of the entire panel-like structure (13); and the first boundary support bar (101) and the second boundary support bar (102) both extend along the first direction; the other end of the first boundary support bar (101) and the other end of the second boundary support bar (102) are connected via a second side edge (17) of the connecting plate (16); The plurality of support bars (103) include a plurality of first support bars (131) and a plurality of second support bars (132); the plurality of first support bars (131) are parallel to each other; two ends of the first support bar (131) are respectively connected to the first boundary support bar (101) and the second boundary support bar (102); along the first direction, the spacing between two adjacent first support bars (131) decreases monotonically; any two adjacent first support bars (131) are connected to a portion of the second support bars (132) in the plurality of second support bars (132), thereby defining the plurality of hollows (14); or, The plurality of support bars (103) are parallel to each other, and two ends of the support bar (103) are respectively connected to the first boundary support bar (101) and the second boundary support bar (102), and along the first direction, the spacing between two adjacent support bars (103) decreases monotonically, and the area between two adjacent support bars (103) is a hollow (14).

2. The flexible support plate according to claim 1, characterized in that: A plurality of second support bars (132) connected between any two adjacent first support bars (131) are divided into a plurality of first unit structures arranged along a second direction, and any first unit structure comprises a first section (1321), a second section (1322), a third section (1323), a fourth section (1324) and a fifth section (1325), wherein the first section (1321) is located between two adjacent first support bars (131) and extends along the second direction, one end of the first section (1321) is connected to the two adjacent first support bars (131) through the second section (1322) and the third section (1323), and the second end of the first section (1321) is connected to the two adjacent first support bars (131) through the fourth section (1324) and the fifth section (1325); In the second direction, in any two adjacent first unit structures, the fourth segment (1324) of one first unit structure and the second segment (1322) of the other first unit structure are connected to the same point of the same first support bar (131), and the fifth segment (1325) of one first unit structure and the third segment (1323) of the other first unit structure are connected to the same point of the same first support bar (131); The second direction is the extension direction of the sliding axis when the sliding area (12) slides, the second direction is perpendicular to the first direction, and the first section (1321) to the fifth section (1325) are respectively a second support bar (132).

3. The flexible support plate according to claim 2, characterized in that: In any of the first unit structures, the first section (1321), the second section (1322), the fourth section (1324), and the first support bar (131) connected between the second section (1322) and the fourth section (1324) form an isosceles trapezoidal hollow; In any of the first unit structures, the first section (1321), the third section (1323), the fifth section (1325), and the first support bar (131) connected between the third section (1323) and the fifth section (1325) form another hollow isosceles trapezoid; The hollowed-out isosceles trapezoids of two adjacent first unit structures in the second direction share a common bottom edge, and the two isosceles trapezoids sharing a common bottom edge are axially symmetrically distributed with the first support bar (131) to which the bottom edge belongs as an axis.

4. The flexible support plate according to claim 2, characterized in that: The angle between the first section (1321) and the second section (1322) is between 120 degrees and 175 degrees.

5. The flexible support plate according to claim 1, characterized in that: A plurality of second support bars (132) connected between any two adjacent first support bars (131) are divided into a plurality of second unit structures arranged along a second direction, and any second unit structure comprises a sixth segment (1326), a seventh segment (1327), an eighth segment (1328) and a ninth segment (1329), one end of the sixth segment (1326), one end of the seventh segment (1327), one end of the eighth segment (1328) and one end of the ninth segment (1329) are connected at the same point, the other end of the sixth segment (1326) and the other end of the seventh segment (1327) are connected to one of the two adjacent first support bars (131), and the other end of the eighth segment (1328) and the other end of the ninth segment (1329) are connected to the other of the two adjacent first support bars (131); In the second direction, in any two adjacent second unit structures, the other end of the seventh segment (1327) of one second unit structure and the other end of the sixth segment (1326) of the other second unit structure are connected to the same point of the same first support bar (131), and the other end of the ninth segment (1329) of one second unit structure and the other end of the eighth segment (1328) of the other second unit structure are connected to the same point of the same first support bar (131); The second direction is the extension direction of the sliding axis when the sliding area (12) slides, the second direction is perpendicular to the first direction, and the sixth section (1326) to the ninth section (1329) are respectively a second support bar (132).

6. The flexible support plate according to claim 5, characterized in that: In any of the second unit structures, the sixth section (1326), the seventh section (1327) and the first support bar (131) connected between the sixth section (1326) and the seventh section (1327) form a hollow isosceles triangle; In any of the second unit structures, the eighth section (1328), the ninth section (1329) and the first support bar (131) connected between the eighth section (1328) and the ninth section (1329) form another hollow isosceles triangle; The hollowed-out isosceles triangles of two adjacent second unit structures in the second direction share a common bottom edge, and the two isosceles triangles with a common bottom edge are axially symmetrically distributed with the first support bar (131) to which the bottom edge belongs as an axis.

7. The flexible support plate according to claim 5, characterized in that: The angle between the sixth section (1326) and the seventh section (1327) is between 10 degrees and 170 degrees.

8. The flexible support plate according to claim 1, characterized in that: The width of the support bar (103) is between 50 microns and 350 microns.

9. The flexible support plate according to any one of claims 1 to 8, characterized in that: Along a second direction, the total area of ​​the hollowing (14) within a unit area accounts for an equal proportion, the second direction is the extension direction of the sliding axis when the sliding area (12) slides, and the second direction is perpendicular to the first direction.

10. The flexible support plate according to any one of claims 1 to 8, characterized in that: The first support plate (10) is a titanium plate or an alloy plate.

11. The flexible support plate according to claim 10, characterized in that: The thickness of the first support plate (10) is between 100 micrometers and 500 micrometers.

12. The flexible support plate according to any one of claims 1 to 8, characterized in that: The flexible support plate also includes: A second support plate (20), wherein the second support plate (20) is a whole flat plate structure; An adhesive layer (30) is bonded between the first support plate (10) and the second support plate (20).

13. The flexible support plate according to claim 12, characterized in that: The thickness of the second support plate (20) is between 20 micrometers and 100 micrometers; The thickness of the adhesive layer (30) is between 10 micrometers and 300 micrometers.

14. The flexible support plate according to claim 12, characterized in that: Part of the adhesive layer (30) is located in the hollow (14), and the ratio of the volume of the adhesive layer (30) in any hollow (14) to the total volume of the hollow (14) is between 10% and 20%.

15. A display device, characterized in that: The display device comprises the flexible support plate according to any one of claims 1 to 14 and a display module located on the flexible support plate.

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