Support plate and folding display

Abstract

A support plate includes a support plate body and a plurality of through holes, the support plate body having at least one patterning region, the plurality of through holes being provided in the at least one patterning region and penetrating the support plate body along a thickness direction of the support plate body, and each through hole has a strip-like shape when projected on a first plane perpendicular to the thickness direction of the support plate body.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and more particularly to a support plate and a foldable display.

Background Art

[0002] With the rapid development of display technology, various types of displays are emerging in the market to meet the needs of different users. Flexible display technology has opened up a new application form direction for the design of future mobile terminals. Since the flexible display itself has characteristics such as relatively light weight, thinness, and high flexibility, various application forms such as folding and rolling can be realized.

[0003] Among them, the foldable display among flexible displays has advantages such as being convenient to carry and having a small size, and thus has become the focus of current display research and development.

Summary of the Invention

Means for Solving the Problems

[0004] In one aspect, a support plate is provided that includes a support plate body and a plurality of through holes. The support plate body has at least one patterning region, and the plurality of through holes are provided in the at least one patterning region and penetrate the support plate body along the thickness direction of the support plate body. The projection shape of each through hole in a first plane perpendicular to the thickness direction of the support plate body is strip-shaped.

[0005] In some embodiments, each of the plurality of through holes extends along a first direction in the first plane.

[0006] In some embodiments, the projection shape of at least one of the plurality of through holes in the first plane is rectangular.

[0007] In some embodiments, the projected shape of at least one of the plurality of through-holes on the first plane is a chamfered rectangle.

[0008] In some embodiments, the projected shape of at least one of the plurality of through-holes on the first plane is a closed shape composed of two straight portions and two curved portions. Both of the two straight portions extend along the first direction, and each end of one straight portion is aligned with one end of the other straight portion in the second direction. The second direction is perpendicular to the first direction in the first plane, and each curved portion is connected to the aligned ends of the two straight portions respectively.

[0009] In some embodiments, each curved portion is a semi-circle.

[0010] In some embodiments, the plurality of through-holes are arranged in a plurality of rows of through-holes along the second direction. Any two adjacent rows of through-holes are provided with a gap. Each row of through-holes has at least one through-hole arranged along the first direction. The second direction is perpendicular to the first direction in the first plane.

[0011] In some embodiments, each row of through-holes has a plurality of through-holes arranged along the first direction. Among any two adjacent rows of through-holes in the plurality of rows of through-holes, any through-hole other than the two outermost through-holes in one row overlaps with the projection of two adjacent through-holes in the other row in a second plane perpendicular to the second direction. Each of the two outermost through-holes overlaps with the projection of one through-hole or two adjacent through-holes in the other row in a second plane perpendicular to the second direction.

[0012] In some embodiments, the projection on the second plane of the portion between any two through-holes among the through-holes in the one column is located at the center of the projection on the second plane of one of the through-holes in the other column.

[0013] In some embodiments, the maximum value A of the lengths of the plurality of through-holes along the first direction max and the minimum value C of the first intervals along the second direction between any one of the through-holes in one column and any one of the through-holes in the adjacent column of the through-holes min and the bending radius R at which the support plate body is bent along the bending line parallel to the first direction within at least one patterning region satisfy the following relational expression.

Number

[0014] Here, the length of each through-hole along the first direction is the maximum length of the through-hole along the first direction, and the maximum value A max is the maximum value among the plurality of maximum lengths, and the first interval along the second direction between any one of the through-holes in one column and any one of the through-holes in the adjacent column of the through-holes is the minimum first interval of the two through-holes along the second direction, and the minimum value C min is the minimum value among the plurality of minimum first intervals, and the maximum value A max , the minimum value C min , and the unit of the bending radius R are the same.

[0015] In some embodiments, the minimum value C min and the thickness t of the support plate body satisfy the following relational expression. t:C min =1~4

[0016] In some embodiments, the maximum value D of the widths of the plurality of through-holes along the second direction maxand the minimum value C min satisfies the following relational expression. D max :C min = 1 to 5

[0017] Here, the width of each through hole along the second direction is the maximum width of the through hole along the second direction, and the maximum value D max is the maximum value among the plurality of maximum widths. In some embodiments, the minimum value B of the second intervals along the first direction of each two adjacent through holes among the through holes in the same column min and the minimum value C min satisfies the following relational expression. B min :C min = 0.5 to 4

[0018] Here, the second interval along the first direction of each two adjacent through holes is the minimum second interval of the two through holes along the first direction, and the minimum value B min is the minimum value among the plurality of minimum second intervals. In some embodiments, The maximum value A max and the minimum value B min satisfies the following relational expression. A max : B min = 10 to 100

[0019] In some embodiments, the first intervals along the second direction of any one of the through holes in a column and any one of the through holes in an adjacent column are equal. In some embodiments, each of the plurality of through holes has the same projected shape and equal area in the first plane.

[0020] In some embodiments, the maximum length of each through hole along the first direction is in the range of 1 to 50 mm, and the thickness t of the support plate body is in the range of 0.01 to 0.5 mm.

[0021] In another aspect, a foldable display is provided that includes a flexible display panel and a support plate in any one of the above-described embodiments. The flexible display panel has a bending display portion, and the support plate is provided on the side opposite to the light-emitting side of the flexible display panel. The orthographic projection of the bending display portion of the flexible display panel on the first plane overlaps with the orthographic projection of each of the at least one patterning region on the first plane.

[0022] In some embodiments, the at least one patterning region is one including the and the orthographic projection of the bending display portion of the flexible display panel on the first plane is within this patterning region orthographic projection on the first plane of and is located within it.

[0023] In some embodiments, each of the plurality of through holes extends along the first direction in the first plane, and the bending display portion of the flexible display panel is bent along a bending line parallel to the first direction.

Brief Description of the Drawings

[0024] Hereinafter, in order to more clearly explain the technical solutions in the present disclosure, the drawings used in some embodiments of the present disclosure will be briefly described below. It is obvious that the drawings described below are only the drawings of some embodiments of the present disclosure, and those skilled in the art can further obtain other drawings based on these drawings. Also, these drawings may be regarded as schematic diagrams and do not limit the actual dimensions of the products according to the embodiments of the present disclosure, the actual processes of the methods, the actual timings of the signals, etc.

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6A

Figure 6B

Figure 6C

Figure 7A

Figure 7B

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Modes for Carrying Out the Invention

[0026] Hereinafter, with reference to the drawings, the technical solutions in some embodiments of the present disclosure will be clearly and completely described. Of course, the embodiments described here are only a part of the embodiments of the present disclosure, not all embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art shall fall within the scope of the claims of the present disclosure.

[0027] As used herein, the singular form "one" includes the plural unless otherwise specified. In this specification, unless otherwise explained, the term "comprise" or other forms thereof, such as the third-person singular form "comprises" and the present participle form "comprising", should be construed in an open, inclusive sense, i.e., "including but not limited to". Also, in the description of the specification, terms such as "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example", or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic related to this embodiment or example is included in at least one embodiment or exemplification of the present disclosure. The schematic expressions of the above terms do not necessarily indicate the same embodiment or the same example. Also, the above-mentioned particular features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any suitable manner.

[0028] Hereinafter, terms such as "first", "second", etc. are used for the purpose of explanation and should not be understood as indicating relative importance, explicitly or implicitly, or indicating the number of technical features shown. Therefore, features limited by "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the embodiments of the present disclosure, unless otherwise specified, "a plurality" means two or more.

[0029] The term "same layer" refers to a layer structure formed by the same film-forming process for forming a specific pattern and further formed by a patterning process using the same mask plate. The patterning process may include an exposure, development, and etching process, and the specific pattern of the formed layer structure may be continuous or discontinuous, and these specific patterns may be located at different heights or may have different thicknesses.

[0030] When describing some embodiments, the term "connected" and its derivative expressions may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. However, terms such as "connected" may further mean that two or more components are not in direct contact with each other but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content of this specification.

[0031] It should be understood that when a layer or element is said to be on another layer or substrate, the layer or element may be directly on the other layer or substrate, or an intermediate layer may exist.

[0032] As used herein, "apply" or "configured to" means open and inclusive and does not exclude applying to a device that performs additional tasks or steps or being configured to a device that performs additional tasks or steps.

[0033] Furthermore, the use of "based on" means open and inclusive because a process, step, calculation, or other operation performed "based on" one or more recited conditions or values may actually be based on additional conditions or may exceed the recited values.

[0034] As used herein, "about" or "approximate" includes the recited value and the average value within an acceptable deviation range of a particular value, and the acceptable deviation range is determined, for example, in consideration of the errors associated with the measurements and the measurements of specific quantities being considered by those skilled in the art (i.e., the limitations of the measurement system).

[0035] In this specification, exemplary embodiments are described with reference to cross-sectional views and / or plan views as idealized exemplary drawings. In the drawings, the thicknesses of layers and regions are exaggerated for clarity. Exemplary embodiments of the present disclosure should not be construed as being limited to the shapes of the regions illustrated herein, but include shape deviations resulting from manufacturing and the like. For example, an etching region shown as a rectangle typically has curved features. Thus, the regions shown in the drawings are essentially exemplary, and their shapes are not intended to represent the actual shapes of the regions of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0036] Some embodiments of the present disclosure provide a foldable display. The foldable display is used as a product or component having a display function such as a television, a mobile phone, a tablet computer, a notebook computer, a digital photo frame, a car navigation system, etc., and the embodiments of the present disclosure are not particularly limited to the uses of the foldable display.

[0037] In some embodiments, the foldable display is a liquid crystal display (abbreviated as LCD).

[0038] In some other embodiments, the foldable display is an electroluminescence display or another type of display.

[0039] In some examples, the electroluminescence display is an organic light-emitting diode display, a quantum dot light-emitting diode display, or a micro-LED display.

[0040] In some embodiments, as shown in FIG. 1, the foldable display includes a flexible display panel 2 and a support plate 1 provided on the side opposite to the light-emitting side of the flexible display panel 2.

[0041] In some examples, the flexible display panel 2 and the support plate 1 are fixed by an adhesive, that is, as shown in FIG. 1, an adhesive layer 201 is further provided between the flexible display panel 2 and the support plate 1.

[0042] Exemplarily, the material of the adhesive layer 201 is a thermosetting resin or a photocurable resin.

[0043] As another example, the flexible display panel 2 and the support plate 1 are fixed by a fixing member such as a snap fit.

[0044] Of course, the flexible display panel 2 and the support plate 1 may be fixed by other structures, and the embodiments of the present disclosure are not particularly limited to the fixing method of the flexible display panel 2 and the support plate 1.

[0045] In some embodiments, other structures such as a backlight assembly are further provided between the flexible display panel 2 and the support plate 1, and the embodiments of the present disclosure are not limited thereto.

[0046] In some other embodiments, as shown in FIG. 2, the foldable display further includes a frame 3, a cover plate 4, and other electronic accessories, etc. Of course, the foldable display may further include more or fewer components, and the relative positions between these components may be changed.

[0047] Exemplarily, the frame 3 has a U-shaped longitudinal section, the flexible display panel 2, the support plate 1, and other electronic accessories are all provided within the frame 3, and the cover plate 4 is provided on the side away from the support plate 1 of the flexible display panel 2.

[0048] In some further alternative embodiments, the foldable display is a liquid crystal display, and the foldable display further includes a backlight assembly configured to supply light to the flexible display panel 2. The backlight assembly is provided between the flexible display panel 2 and the support plate 1.

[0049] Also, in the embodiments of the present disclosure, the structure of the flexible display panel 2 is not particularly limited. For example, when the foldable display is an electroluminescence display, the flexible display panel 2 is an electroluminescence display panel, and when the foldable display is a liquid crystal display, the flexible display panel 2 is a liquid crystal display panel. To facilitate the understanding of each embodiment in the present disclosure, hereinafter, taking the case where the flexible display panel 2 is a liquid crystal display panel and the case where it is an electroluminescence display panel as examples, the structure of the flexible display panel 2 will be exemplarily described. However, the following exemplary description does not limit the structure of the flexible display panel 2 provided by the embodiments of the present disclosure, and the structure of the flexible display panel 2 according to the embodiments of the present invention may be changed to other forms.

[0050] In some embodiments, the foldable display is an electroluminescence display, and the flexible display panel 2 is an electroluminescence display panel. As shown in FIG. 3, the electroluminescence display panel includes a display substrate 21 and a sealing layer 22 for sealing the display substrate 21.

[0051]

[0051] In some examples, the sealing layer 22 is a sealing thin film.

[0052]

[0052] In some other examples, the sealing layer 22 is a sealing substrate.

[0053] In some examples , e , e The electroluminescence display panel has a plurality of sub-pixel regions.As shown in Figure 3, It is shown that the substrate 21 includes a first base 210, a plurality of light-emitting elements provided on the first base 210, and a plurality of pixel driving circuits. Usually, each pixel driving circuit corresponds to one light-emitting element, and both are provided in one sub-pixel region. Each pixel driving circuit includes a plurality of thin-film transistors 211. Each thin-film transistor 211 includes an active layer, a source electrode, a drain electrode, a gate electrode, and a gate insulating layer, and the source electrode and the drain electrode are in contact with the active layer respectively. Each light-emitting element includes an anode 212, a light-emitting functional layer 213, and a cathode 214. The anode 212 of each light-emitting element is electrically connected to the drain electrode of the thin-film transistor 211 as a driving transistor among the plurality of thin-film transistors 211 of the corresponding pixel driving circuit.

[0054] Exemplarily, the light-emitting functional layer 213 includes only a light-emitting layer. Also, exemplarily, in addition to the light-emitting layer, the light-emitting functional layer 213 further includes one or more layers among an electron transporting layer (abbreviated as ETL), an electron injection layer (abbreviated as EIL), a hole transporting layer (abbreviated as HTL), and a hole injection layer (abbreviated as HIL).

[0055] In some other examples, the display substrate 21 further includes a pixel defining layer 215, the pixel defining layer 215 includes a plurality of opening regions, and one light-emitting element is provided in one opening region.

[0056] In some still other examples, as shown in FIG. 3, the display substrate 21 further includes a planarization layer 216 provided between the pixel driving circuit and the anode 212 of the light-emitting element corresponding to the pixel driving circuit.

[0057] In some examples, the electroluminescence display panel is a top emission type display panel. In this case, for the light-emitting element, the anode 212 close to the first base 210 is opaque, and the cathode 214 away from the first base 210 is transparent or semi-transparent.

[0058] In some other examples, the electroluminescence display panel is a bottom emission type display panel. In this case, for the light emitting element, the anode 212 close to the first base 210 is transparent or translucent, and the cathode 214 away from the first base 210 is opaque.

[0059] In some still other examples, the electroluminescence display panel is a double-sided emission type display panel. In this case, for the light emitting element, both the anode 212 close to the first base 210 and the cathode 214 away from the first base 210 are transparent or translucent.

[0060] In some other embodiments, the foldable display is a liquid crystal display, and the flexible display panel 2 is a liquid crystal display panel. As shown in FIG. 4, the liquid crystal display panel includes an array substrate 23 and a counter substrate 24 provided opposite to each other, and a liquid crystal layer 25 provided between the array substrate 23 and the counter substrate 24.

[0061] In some examples, the array substrate 23 includes a second base 230, a thin film transistor 211 provided on the second base 230, and a pixel electrode 231. The pixel electrode 231 is electrically connected to the drain electrode of the thin film transistor 211. The array substrate 23 has a plurality of sub-pixel regions. Usually, the thin film transistor 211 and the corresponding pixel electrode 231 are provided within one sub-pixel region.

[0062] In some other examples, the array substrate 23 further includes a common electrode 232 provided on the second base 230.

[0063] Exemplarily, the pixel electrode 231 and the common electrode 232 are provided in the same layer. In this case, both the pixel electrode 231 and the common electrode 232 have a comb-like structure including a plurality of strip-shaped electrodes.

[0064] Also, by way of example, the pixel electrode 231 and the common electrode 232 are provided in different layers. In this case, as shown in FIG. 4, a first insulating layer 233 is provided between the pixel electrode 231 and the common electrode 232. When the common electrode 232 is provided between the thin film transistor 211 and the pixel electrode 231, as shown in FIG. 4, a second insulating layer 234 is further provided between the common electrode 232 and the thin film transistor 211.

[0065] In some examples, as shown in FIG. 4, the counter substrate 24 has a color filter layer 241 provided on the third base 240. In this case, the counter substrate 24 is also referred to as a color filter (abbreviated as Color filter, CF). The color filter layer 241 includes at least a red photoresist portion, a green photoresist portion, and a blue photoresist portion, and the red photoresist portion, the green photoresist portion, and the blue photoresist portion face the sub-pixel regions on the array substrate 23 one-to-one. The counter substrate 24 further includes a black matrix pattern 242 provided on the third base 240. The black matrix pattern 242 is configured to separate the red, green, and blue photoresist portions.

[0066] In some examples, as shown in FIG. 4, the liquid crystal display panel further includes an upper polarizing plate 26 provided on the side of the counter substrate 24 away from the liquid crystal layer 25, and a lower polarizing plate 27 provided on the side of the array substrate 23 away from the liquid crystal layer 25.

[0067] In some embodiments of the present disclosure, a support plate 1 applied to the above-described foldable display is provided. As shown in FIG. 5 , Figures 6A and 6B the support plate 1 has a support plate body 11 and a plurality of through holes 10. The support plate body 11 has at least one patterning region 03, and the plurality of through holes 10 are provided in at least one patterning region 03 and penetrate the support plate body 11 along the thickness direction of the support plate body 11.

[0068] In some examples, as shown in FIG. 5, the support plate body 11 has one patterning region 03, and a plurality of through holes 10 are provided within the patterning region 03.

[0069] In some other examples, as shown in FIGS. 6A and 6B, the support plate body 11 has a plurality of patterning regions 03, and a plurality of through holes 10 are provided in the plurality of patterning regions 03, and different the number of through holes within the patterning regions 03 is not exactly equal. Here, "not exactly equal" means that the number of through holes in some patterning regions is equal, the number of through holes in some patterning regions is not equal, or the number of through holes in each patterning region is not equal at all.

[0070] In the embodiments of the present disclosure, the number of patterning regions 03 of the support plate body 11 is not particularly limited, and the number of through holes within each patterning region 03 is also not particularly limited, and both can be set according to the bending requirements of the support plate. For example, a patterning region is provided at a position where the bending degree of the support plate is large, and the number of through holes is set according to the magnitude of the bending stress that needs to be released during bending within the patterning region.

[0071] Exemplarily, as shown in FIG. 6A, the support plate body 11 has two patterning regions 03, a plurality of through holes 10 are provided in the two patterning regions 03, and the number of through holes within each patterning region 03 is equal.

[0072] Also, exemplarily, as shown in FIG. 6B, the support plate body 11 has three patterning regions 03, and a plurality of through holes 10 are provided in the three patterning regions 03. The support plate shown in FIG. 6B is bent into a water droplet shape as shown in FIG. 6C, and the three patterning regions 03 are respectively located at three positions with a large bending degree. Here, the number of through holes within the patterning region at the position with the largest bending degree is relatively large.

[0073] As shown in FIGS. 5, 6A, and 6B, the projected shape of each through-hole 10 in the first plane orthogonal to the thickness direction of the support plate body 11 is strip-shaped. Thus, when the support plate 1 is bent within the patterning region 03, the plurality of strip-shaped through-holes 10 deform along with the bending of the support plate 1, thereby releasing the bending stress, effectively alleviating the problem of stress concentration generated when the support plate 1 is bent, significantly improving the bending ability of the support plate 1. When the support plate is expanded again after being bent, the plurality of strip-shaped through-holes return to their original state, thereby improving the resilience of the support plate 1 after bending, and enabling the support plate 1 to obtain good bending and expanding effects. When the support plate 1 is applied to a foldable display, the bendability of the foldable display, the flatness when the foldable display is folded and expanded again, and the resilience after bending can be further improved. Of course, the projected shape of the plurality of through-holes 10 in the first plane orthogonal to the thickness direction of the support plate body 11 may be other shapes such as circular, elliptical, or other regular or irregular shapes. As long as the through-holes can release the bending stress when the support plate 1 is bent, they are not particularly limited in the embodiments of the present disclosure.

[0074] In some embodiments, the material of the support plate 1 is a material having a certain degree of toughness and rigidity, such as metal, glass, ceramic, or organic matter. The toughness of the material ensures the resilience of the support plate 1 after bending and the flatness of the support plate 1 after deployment, and the rigidity of the material ensures the supporting performance of the support plate 1.

[0075] In some examples, the material of the support plate 1 is metal. Metal has a relatively high Young's modulus, excellent workability, high rigidity and toughness, and can meet various requirements of the foldable display.

[0076] In some embodiments, as shown in FIGS. 5, 6A, and 6B, each through hole 10 extends along a first direction X on a first plane. That is, the extending directions of the plurality of through holes 10 are parallel, and the dimension of each through hole 10 along the first direction X is larger than the dimension along a second direction Y. Here, as shown in FIGS. 5, 6A, and 6B, for example, the support plate body 11 is rectangular, and the extending directions of two opposite sides of the support plate body 11 are parallel to the first direction X. The second direction Y is perpendicular to the first direction X on the first plane. Thus, when the support plate 1 is bent along a bending line 12 parallel to the first direction X, each through hole 10 deforms along the second direction Y and deforms to the maximum extent, so that the bending stress can be released to the maximum extent, improving the bendability and the resilience after bending of the support plate 1.

[0077] Note that the bending line 12 is a dummy line.

[0078] In some embodiments, as shown in FIG. 7A, the projected shape of each of the plurality of through holes 10 on the first plane is rectangular.

[0079] In some other embodiments, as shown in FIG. 7B, the projected shape of each of the plurality of through holes 10 on the first plane is a chamfered rectangle. Here, the chamfered rectangle means that all four inner angles of the rectangle are chamfered angles. Of course, the chamfered rectangle may also be a rectangle with some of its inner angles chamfered. 。

[0080] When the support plate 1 is bent, as shown in FIG. 7A, at least one the projected shape of the through hole 10 on the first plane is rectangular, and the bending stress concentrates at the intersection of the two sides at right angles. As shown in FIG. 7B, when the projected shape of each through hole 10 on the first plane is a chamfered rectangle, the bending stress concentrates at the intersection of the arc of the chamfered rectangle and the two adjacent sides. Comparing the two, the bending stress release ability of the through hole 10 whose projected shape on the first plane is a chamfered rectangle is greater than that of the through hole 10 whose projected shape on the first plane is rectangular. Thereby, the support plate 1 is less likely to crack when bent.

[0081] In some further alternative embodiments, the projected shape of each of the plurality of through-holes 10 in the first plane is a closed shape composed of two straight portions and two curved portions. Here, both of the two straight portions extend along the first direction X, and each end of one straight portion is aligned with one end of the other straight portion in the second direction Y. Each curved portion is connected to the aligned end of each of the two straight portions.

[0082] In some examples, each curved portion is a semi-circle. That is, as shown in FIG. 5 , Figures 6A and 6B as shown, at least one the projected shape of the through-hole 10 in the first plane is a closed shape composed of two straight portions and two semi-circles. Thus, when the support plate 1 is bent, the bending stress is dispersed for each semi-circle. Thereby, the bending stress can be more greatly dispersed, the bendability of the support plate 1 can be improved, and cracks generated when the support plate 1 is bent can be prevented.

[0083] Also, in some further alternative embodiments, the plurality of through-holes 10 are completely identical. Here, "completely identical" means that the projected shapes of each of the through-holes 10 in the first plane are completely identical, and the areas of the projected shapes are equal, that is, the sizes of the projected shapes of each of the through-holes 10 in the first plane are equal.

[0084] Exemplarily , each the projected shape of the through-hole 10 in the first plane is a closed shape composed of two straight portions and two semi-circles, and the areas of the closed shapes are completely equal. That is, in the projected shape of each of the through-holes 10 in the first plane, the lengths and intervals of the two straight portions are both equal, and the radii of the two semi-circles are both equal.

[0085] Also, by way of example, as shown in FIG. 7B, the projected shapes of each through hole 10 on the first plane are all chamfered rectangles, and the projected areas of the chamfered rectangles are equal, that is, the lengths and widths of the sides of each right angle in the projected shape of each through hole 10 on the first plane are all equal. Thus, when the support plate 1 is bent, the bending stress is evenly distributed, thereby avoiding cracking of the support plate 1 due to uneven distribution of the bending stress.

[0086] Also, in some further alternative embodiments, the plurality of through holes 10 are not completely identical. Here, "not completely identical" means that some are identical and some are not, or all are different.

[0087] In some examples, the projected shapes of the plurality of through holes 10 on the first plane are not completely identical. By way of example, the projected shape of some through holes 10 on the first plane is rectangular, the projected shape of some through holes 10 on the first plane is a chamfered rectangle, and the projected shape of some through holes 10 on the first plane is a closed shape composed of two straight portions and two semi - circles. Also, by way of example, the projected shapes of each of the plurality of through holes 10 on the first plane are all different.

[0088] In some other examples, as shown in FIG. 8, the projected shapes of each through hole 10 on the first plane are completely identical, but the areas of the projected shapes are not completely equal, that is, the dimensions of the projected shapes of each through hole 10 on the first plane are not completely identical.

[0089] In some embodiments, as shown in FIGS. 5 - 8, the plurality of through holes 10 are arranged in a plurality of rows of through holes 10 along the second direction Y, and any two adjacent rows of through holes 10 are provided with a gap. FIGS. 5 - 8 show examples including a plurality of through holes 10 in which each row of through holes 10 is arranged along the first direction X. Of course, each row of through holes 10 or some rows of through holes 10 among the plurality of rows of through holes 10 each column of may include only one through-hole 10. In an embodiment of the present disclosure, the number of through-holes 10 arranged along the first direction X in each column of through-holes 10 is not particularly limited.

[0090] In some examples, among any two adjacent columns of through-holes 10 in a plurality of columns of through-holes 10, any through-hole 10 other than the two outermost through-holes 10 in one column of through-holes 10 overlaps with the projection in a second plane orthogonal to the second direction Y of two adjacent through-holes 10 in the other column of through-holes 10. Exemplarily, FIG. 6 A As shown in, the first through-hole 101 overlaps with the projection in a second plane orthogonal to the second direction Y of the second through-hole 102 and the third through-hole 103 among the through-holes 10 in the adjacent column.

[0091] In some other examples, among any two adjacent columns of through-holes 10 in a plurality of columns of through-holes 10, each through-hole 10 among the two outermost through-holes 10 in one column of through-holes 10 overlaps with the projection in a second plane orthogonal to the second direction of one through-hole 10 or two adjacent through-holes 10 in the other column of through-holes 10. Exemplarily, as shown in FIG. 6, the fourth through-hole 104 among the through-holes 10 in the middle column overlaps with the projection in a second plane orthogonal to the second direction Y of the second through-hole 102 among the through-holes 10 in the adjacent column. Also, exemplarily, FIG. 6 A As shown in, the second through-hole 102 overlaps with the projection in a second plane orthogonal to the second direction Y of the first through-hole 101 and the fourth through-hole 104 among the through-holes 10 in the adjacent column.

[0092] As shown in FIG. 9, among any two adjacent columns of through-holes 10 in a plurality of columns of through-holes 10, any through-hole 10 in one column of through-holes 10 one corresponding overlaps with the projection in a second plane orthogonal to the second direction Y of the through-holes 10 in the other column of through-holes 10 completely overlapping Based on this, among the through holes 10 in each column, the solid parts between any two adjacent through holes 10 are continuous in the second direction Y with the solid parts between two adjacent through holes 10 among the through holes 10 in adjacent columns, as shown by the dotted elliptical part 13 in FIG. 9 for example. Thus, when the support plate 1 is bent along the bending line 12, since the direction of the bending stress is parallel to the second direction Y, the stress applied to the solid part between two adjacent columns of through holes 10 increases, and the support plate 1 is likely to crack.

[0093] Compared with the arrangement method of the multiple columns of through holes 10 shown in FIG. 9, the arrangement method of the multiple columns of through holes 10 shown in FIGS. 5 to 8, that is, the solid parts between any two adjacent columns of through holes 10 among the through holes 10 in each column are arranged to intersect in the second direction Y such that the solid part between any two adjacent columns of through holes 10 faces one of the through holes 10 among the through holes 10 in the adjacent column in the second direction Y, can avoid the above problems and effectively improve the bendability of the support plate 1.

[0094] In some embodiments, as shown in FIGS. 5 to 7B, among any two adjacent columns of through holes 10 among the multiple columns of through holes 10, the projection of the part between any two through holes 10 in one column on the second plane is located in the middle of the projection of one of the through holes 10 in the other column on the second plane. Referring to FIG. 12, the support plate 1 is modeled, and the cloud diagram of the stress distribution after the support plate 1 is bent is analyzed by software. According to the cloud diagram of the stress distribution, the maximum value A among the lengths of the multiple through holes 10 along the first direction X max and the minimum value B among the second intervals along the first direction X between every two adjacent through holes 10 in the same column of through holes 10 min and the minimum value C among the first intervals along the second direction Y between any one of the through holes 10 in one column of through holes 10 and any one of the through holes 10 in the adjacent column of through holes 10 minand the maximum value D among the widths of the plurality of through-holes 10 along the second direction max and the support bent along the bending line 12 parallel to the first direction X in the patterning region 03 plate The relationship between the bending radius R (shown in FIG. 10) of the support plate body 11 and the thickness t of the support plate body 11 can be obtained

[0095] Here, the length of each through-hole 10 along the first direction X is the maximum length along the first direction X of the through-hole 10, and the maximum value A max is the maximum value among the plurality of maximum lengths. Among the through-holes 10 in the same column, the second interval along the first direction X between every two adjacent through-holes 10 is the minimum second interval along the first direction X of the two through-holes 10, and the minimum value B min is the minimum value among the plurality of minimum second intervals. The first interval along the second direction Y between any one through-hole 10 among the through-holes 10 in one column and any one through-hole 10 among the through-holes 10 in the adjacent column is the minimum first interval along the second direction of the two through-holes 10, and the minimum value C min is the minimum value among the plurality of minimum first intervals. The width of each through-hole 10 along the second direction Y is the maximum width along the second direction Y of the through-hole 10, and the maximum value D max is the maximum value among the plurality of maximum widths

[0096] Exemplarily, as shown in FIG 5 and and FIG. 11 Regarding the through hole whose orthographic projection on the first plane is a closed shape, The projected shape of each through-hole 10 in the first plane is completely the same, the areas are equal, and they are evenly arranged within the patterning region 03. Therefore, the maximum length A of each through-hole 10 along the first direction X is equal, that is, A max is equal to A adjacent The minimum second interval B between every two through-holes 10 along the first direction X is equal, that is B minis equal to B, where any one of the through-holes 10 in one column is equal to the minimum first interval C along the second direction Y with any one of the through-holes 10 in the adjacent column, that is C min is equal to C, and the maximum width D along the second direction Y of each through-hole 10 is equal, that is D max is equal to D.

[0097] Also, exemplarily, as shown in FIG. 13 (FIG. 13 is a partially enlarged view of P' in FIG. 8), Regarding the through hole whose orthographic projection on the first plane is a closed shape, The projected shape of each through-hole 10 in the first plane is exactly the same, but its area is not exactly the same, that is, the dimensions are not exactly the same. The maximum length along the first direction X of each through-hole 10 among the plurality of through-holes 10 is not exactly the same, that is, there are a plurality of maximum lengths. In this case, the maximum value A max is the maximum value A' among the plurality of maximum lengths. Among the through-holes 10 in the same column of the plurality of through-holes 10, the minimum second interval along the first direction X between any two adjacent through-holes 10 is not exactly the same, that is, there are a plurality of minimum second intervals. In this case, the minimum value B min is the minimum value B' among the plurality of minimum second intervals. Among any two adjacent columns of through-holes 10 among the plurality of through-holes 10, the minimum first interval along the second direction Y between any one of the through-holes 10 in one column and any one of the through-holes 10 in the adjacent column is not exactly the same, that is, there are a plurality of minimum first intervals. In this case, the minimum value C min is the minimum value C' among the plurality of minimum first intervals. The maximum width along the second direction Y of each of the plurality of through-holes 10 is equal, that is, D max is equal to D'.

[0098] In some embodiments, the maximum value A max , the minimum value C min , and the bending radius R satisfy the following relational expressions.

Equation

[0099] In this way, by designing the maximum value A max and the minimum value C min of the plurality of through holes 10, that is, by designing the shape of the plurality of through holes 10 and the arrangement in the patterning region 03 of the plurality of through holes 10, the support plate body 11 can be adapted to a smaller bending radius, improving the bendability of the support plate 1, and thereby improving the folding effect of the folding display when applied to the folding display.

[0100] In some other embodiments, the maximum value A max , the minimum value C min , and the bending radius R satisfy the following relational expression

Equation

[0101] In this way, when the minimum bending radius is satisfied, the thickness of the support plate body can be minimized, and thereby the thickness of the folding display can be reduced when applied to the folding display.

[0102] In some still other embodiments, the maximum value A max , the minimum value C min , and the bending radius R satisfy the following relational expression

Equation

[0103] In some further alternative embodiments, the maximum value A max , the minimum value C min , and the bending radius R satisfy the following relational expressions,

Number

[0104] In some further alternative embodiments, the maximum value A max , the minimum value C min , and the bending radius R satisfy the following relational expressions,

Number

[0105] In some further alternative embodiments, the maximum value A max , the minimum value C min , and the bending radius R satisfy the following relational expressions,

Number

[0106] In some further different embodiments, the maximum value A max , the minimum value C min , and the bending radius R satisfy the following relational expressions,

Number

[0107] In some further different embodiments, the maximum value A max , the minimum value C min , and the bending radius R satisfy the following relational expressions,

Number

[0108] In this way, based on different bending radii R, by designing parameters such as the size of each through hole 10 in the patterning region 03, the interval between each through hole 10, and the thickness of the support plate 1, it is ensured that when the support plate 1 is bent at the bending radius R, the maximum stress received by the support plate 1 is smaller than the stress of the material of the support plate 1. That is, when the support plate 1 is bent at the bending radius R along the bending line 12, the support plate 1 can be bent at different bending degrees and then expanded again without breaking, and it is ensured that the support plate 1 has a strong ability to recover the flatness after bending.

[0109] In some embodiments, referring to FIGS. 5 to 9, the actual length along the first direction X of the two through holes 10 at both ends or one through hole 10 at one end among at least one column of through holes 10 is A max If it is smaller, the end on one end side of the column where the through hole 10 is located is not closed. That is, the through hole 10 forms a notch at the end along the first direction X of the support plate body 11.

[0110] Exemplarily, as shown in FIG. 5, a plurality of through holes 10 are arranged as five columns of through holes 10 along the second direction Y in the patterning region 03. In the first column of through holes 10, the third column of through holes 10, and the fifth column of through holes 10, the ends on one end side of the two through holes 10 at both ends of each column of through holes 10 are not closed.

[0111] Also, by way of example, as shown in FIG. 8, a plurality of through-holes 10 are arranged as five columns of through-holes 10 along the second direction Y within the patterning region 03. One end of one through-hole 10 at one end of the first column of through-holes 10 is not closed. The ends on one end side of the through-holes 10 of the two outermost through-holes 10 in the third column and the fifth column of through-holes 10 are not closed.

[0112] In some other embodiments, as shown in FIGS. 16 to 18, the two outermost through-holes 10 in each column of through-holes 10 are both closed through-holes.

[0113] By way of example, as shown in FIG. 16, a plurality of through-holes 10 are arranged as five columns of through-holes 10 along the second direction Y within the patterning region 03. Among the through-holes 10 in each column, the two outermost through-holes 10 are both closed through-holes, and the projected shapes of each through-hole 10 on the first plane are completely identical, and the areas of the projected shapes are completely equal.

[0114] Also, by way of example, as shown in FIG. 17, a plurality of through-holes 10 are arranged as five columns of through-holes 10 along the second direction Y within the patterning region 03. Among the through-holes 10 in each column, the two outermost through-holes 10 are both closed through-holes. Among the through-holes 10 in each column, except for the two outermost through-holes 10, the projected shapes of the other through-holes 10 on the first plane are completely identical, and the areas of the projected shapes are completely equal. The projected shapes of the two outermost through-holes 10 in each column of through-holes 10 on the first plane are completely identical, and the areas of the projected shapes are completely equal.

[0115] Also, by way of example, as shown in FIG. 18, a plurality of through-holes 10 are arranged as five columns of through-holes 10 along the second direction Y within the patterning region 03. Of the through-holes 10 in each column, the two outermost through-holes 10 are both closed through-holes. Note that the projected shapes of each of the plurality of through-holes 10 in the first plane are not completely identical, and the areas of the projected shapes are not completely equal.

[0116] In some embodiments, the maximum length of each through-hole 10 along the first direction X is in the range of 1 mm to 50 mm, and the thickness t of the support plate body 1 1 is in the range of 0.01 mm to 0.5 mm.

[0117] For example, the maximum length of each through-hole 10 along the first direction X may be 1 mm, 2 mm, 5 mm, 8 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, or 50 mm, etc. The thickness t of the support plate body 1 1 may be 0.01 mm, 0.05 mm, 0.1 mm, 0.2 mm, or 0.5 mm, etc.

[0118] Hereinafter, several specific embodiments are provided to specifically illustrate the values of the above parameters. Each embodiment takes, as an example, the projected shape of the plurality of through-holes 10 in the first plane shown in FIG. 5 and the arrangement method in the patterning region 03, Regarding the through hole whose orthographic projection on the first plane is a closed shape , the projected shapes of each through-hole 10 in the first plane are identical, and the areas are equal, and moreover adjacent the second interval between each two through-holes 10 in the first direction X and the first interval along the second direction Y are equal.

[0119] For example, the maximum length A along the first direction X of each through hole 10 is 4 mm, the minimum second interval B along the first direction X between every two adjacent through holes 10 in the same row of through holes 10 is 0.2 mm, the minimum first interval C along the second direction Y between any one through hole 10 in a row of through holes 10 and any one through hole 10 in the adjacent row of through holes 10 is 0.2 mm, the maximum width D along the second direction Y of each through hole 10 is 0.2 mm, and the thickness t of the support plate body 1 1 is 0.2 mm. Also, for example, the maximum length A along the first direction X of each through hole 10 is 6 mm, and the minimum the second of interval B along the first direction X between every two adjacent through holes 10 in the same row of through holes 10 is 0.1 mm, the minimum first interval C along the second direction Y between any one through hole 10 in a row of through holes 10 and any one through hole 10 in the adjacent row of through holes 10 is 0.1 mm, the maximum width D along the second direction Y of each through hole 10 is 0.3 mm, and the support plate body 1 1 has a thickness t of 0.15 mm.

[0120] Also, for example, the maximum length A along the first direction X of each through hole 10 is 9 mm, and the minimum the second of interval B along the first direction X between every two adjacent through holes 10 in the same row of through holes 10 is 0.1 mm, the minimum first interval C along the second direction Y between any one through hole 10 in a row of through holes 10 and any one through hole 10 in the adjacent row of through holes 10 is 0.1 mm, the maximum width D along the second direction Y of each through hole 10 is 0.1 mm, and the support plate body 1 1 has a thickness t of 0.1 mm.

[0121] For example, the maximum length A along the first direction X of each through hole 10 is 4 mm, and the minimum the second of Set the interval B to 0.2 mm, the minimum first interval C along the second direction Y between any one through-hole 10 in a row of through-holes 10 and any one through-hole 10 in the row of through-holes 10 adjacent to it to 0.2 mm, the maximum width D of each through-hole 10 along the second direction Y to 0.2 mm, and the thickness t of the support plate body 1 1 to 0.2 mm and and set the bending radius R to 5 mm The formula

Number

[0122] Also, for example, set the maximum length A of each through-hole 10 along the first direction X to 6 mm, and the minimum the second of interval B between any two adjacent through-holes 10 in the same row of through-holes 10 along the first direction X to 0.2 mm, the minimum first interval C along the second direction Y between any one through-hole 10 in a row of through-holes 10 and any one through-hole 10 in the row of through-holes 10 adjacent to it to 0.2 mm, the maximum width D of each through-hole 10 along the second direction Y to 0.2 mm, and the thickness t of the support plate body 1 1 to 0.2 mm and and set the bending radius R to 3 mm. α is 12.3457 and α is less than 30. When a bending test of 200,000 times was performed on this support plate 1 with a bending radius R of 3 mm, the test was passed, there was no crack, and the recoverability to flatness was also good.

[0123] Also, for example, set the maximum length A of each through-hole 10 along the first direction X to 6 mm, and the minimum the second of Set the interval B to 0.1 mm, the minimum first interval C along the second direction Y between any one through hole 10 in a row of through holes 10 and any one through hole 10 in the adjacent row of through holes 10 to 0.1 mm, the maximum width D along the second direction Y of each through hole 10 to 0.1 mm, and the thickness t of the support plate body 1 1 to 0.1 mm and and set the bending radius R to 1.5 mm. α is 3.08642, and it is calculated that α is less than 30. When a bending test of 200,000 times was performed on this support plate 1 with a bending radius R of 1.5 mm, the test was passed, there was no crack, and the recoverability to flatness was also good.

[0124] Also, for example, set the maximum length A along the first direction X of each through hole 10 to 4 mm, and the minimum the second of interval B between any two adjacent through holes 10 in the same row of through holes 10 along the first direction X to 0.1 mm, the minimum first interval C along the second direction Y between any one through hole 10 in a row of through holes 10 and any one through hole 10 in the adjacent row of through holes 10 to 0.1 mm, the maximum width D along the second direction Y of each through hole 10 to 0.2 mm, and the thickness t of the support plate body 1 1 to 0.15 mm and and set the bending radius R to 1.5 mm. α is 10.4167, and it is calculated that α is less than 30. When a bending test of 200,000 times was performed on this support plate 1 with a bending radius R of 1.5 mm, the test was passed, there was no crack, and the recoverability to flatness was also good.

[0125] Also, for example, set the maximum length A along the first direction X of each through hole 10 to 4.5 mm, and the minimum the second of interval B between any two adjacent through holes 10 in the same row of through holes 10 along the first direction X to 0.2 mm, the minimum first interval C along the second direction Y between any one through hole 10 in a row of through holes 10 and any one through hole 10 in the adjacent row of through holes 10 to 0.15 mm, the maximum width D along the second direction Y of each through hole 10 to 0.2 mm, and the thickness t of the support plate body 1 The thickness t of 1 is 0.15 mm and and set the bending radius R to 3 mm. α is 12.3457, and it is calculated that α is less than 30. When a bending test of 200,000 times was performed on this support plate 1 with a bending radius R of 3 mm, the test was passed, there was no crack, and the recoverability to flatness was also good.

[0126] Also, exemplarily, the maximum length A along the first direction X of each through hole 10 is 2 mm, and the minimum along the first direction X of each two adjacent through holes 10 among the through holes 10 in the same row the second of interval B is 0.2 mm, the minimum first interval C along the second direction Y between any one through hole 10 in one row of through holes 10 and any one through hole 10 in the through holes 10 in the adjacent row is 0.1 mm, and the maximum width D along the second direction Y of each through hole 10 is 0.2 mm, and the support plate body 1 The thickness t of 1 is 0.15 mm and and set the bending radius R to 5 mm. α is 25, and it is calculated that α is less than 30. When a bending test of 200,000 times was performed on this support plate 1 with a bending radius R of 5 mm, the test was passed, there was no crack, and the recoverability to flatness was also good.

[0127] Also, exemplarily, the maximum length A along the first direction X of each through hole 10 is 10 mm, and the minimum along the first direction X of each two adjacent through holes 10 among the through holes 10 in the same row the second of interval B is 0.1 mm, the minimum first interval C along the second direction Y between any one through hole 10 in one row of through holes 10 and any one through hole 10 in the through holes 10 in the adjacent row is 0.1 mm, and the maximum width D along the second direction Y of each through hole 10 is 0.2 mm, and the support plate body 1 The thickness t of 1 is 0.15 mm and and set the bending radius R to 5 mm. α is 0.2, and it is calculated that α is less than 30. When a bending test of 200,000 times was performed on this support plate 1 with a bending radius R of 5 mm, the test was passed, there was no crack, and the recoverability to flatness was also good.

[0128] Also, by way of example, the maximum length A along the first direction X of each through-hole 10 is set to 5 mm, and the minimum the second of spacing B along the first direction X between every two adjacent through-holes 10 among the through-holes 10 in the same row is set to 0.4 mm, the minimum first spacing C along the second direction Y between any one through-hole 10 among the through-holes 10 in one row and any one through-hole 10 among the through-holes 10 in the adjacent row is set to 0.1 mm, the maximum width D along the second direction Y of each through-hole 10 is set to 0.2 mm, and the thickness t of the support plate body 1 1 is set to 0.2 mm and set the bending radius R to 1.5 mm. α is 5.33, and it is calculated that α is less than 30. When a bending test of 200,000 times is performed on this support plate 1 with a bending radius R of 1.5 mm, the test is passed, there is no crack, and the recoverability to flatness is also good.

[0129] Also, by way of example, the maximum length A along the first direction X of each through-hole 10 is set to 10 mm, and the minimum the second of spacing B along the first direction X between every two adjacent through-holes 10 among the through-holes 10 in the same row is set to 0.1 mm, the minimum first spacing C along the second direction Y between any one through-hole 10 among the through-holes 10 in one row and any one through-hole 10 among the through-holes 10 in the adjacent row is set to 0.2 mm, the maximum width D along the second direction Y of each through-hole 10 is set to 0.4 mm, and the thickness t of the support plate body 1 1 is set to 0.2 mm and set the bending radius R to 3 mm. α is 2.67, and it is calculated that α is less than 30. When a bending test of 200,000 times is performed on this support plate 1 with a bending radius R of 3 mm, the test is passed, there is no crack, and the recoverability to flatness is also good.

[0130] Also, by way of example, the maximum length A along the first direction X of each through-hole 10 is set to 6 mm, and the minimum the second of The interval B is set to 0.1 mm, the minimum first interval C along the second direction Y between any one through hole 10 in a row of through holes 10 and any one through hole 10 in the row of through holes 10 adjacent to it is set to 0.1 mm, the maximum width D of each through hole 10 along the second direction Y is set to 0.1 mm, and the thickness t of the support plate body 1 1 is set to 0.1 mm and and set the bending radius R to 1.5 mm. α is 3.09, and it is calculated that α is less than 30. When a bending test of 200,000 times was performed on this support plate 1 with a bending radius R of 1.5 mm, the test was passed, there were no cracks, and the recoverability to flatness was also good.

[0131] Also, exemplarily, the maximum length A of each through hole 10 along the first direction X is set to 6 mm, and the minimum the second of interval B between each two adjacent through holes 10 in a row of through holes 10 along the first direction X is set to 0.2 mm, the minimum first interval C along the second direction Y between any one through hole 10 in a row of through holes 10 and any one through hole 10 in the row of through holes 10 adjacent to it is set to 0.2 mm, the maximum width D of each through hole 10 along the second direction Y is set to 0.5 mm, and the thickness t of the support plate body 1 1 is set to 0.2 mm and and set the bending radius R to 2 mm. α is 18.52, and it is calculated that α is less than 30. When a bending test of 200,000 times was performed on this support plate 1 with a bending radius R of 2 mm, the test was passed, there were no cracks, and the recoverability to flatness was also good.

[0132] Also, exemplarily, the maximum length A of each through hole 10 along the first direction X is set to 8 mm, and the minimum the second of interval B between each two adjacent through holes 10 in a row of through holes 10 along the first direction X is set to 0.1 mm, the minimum first interval C along the second direction Y between any one through hole 10 in a row of through holes 10 and any one through hole 10 in the row of through holes 10 adjacent to it is set to 0.1 mm, the maximum width D of each through hole 10 along the second direction Y is set to 0.1 mm, and the thickness t of the support plate body 1 The thickness t of 1 is 0.4 mm and and set the bending radius R to 5 mm. α is 0.39, and it is calculated that α is less than 30. When a bending test of 200,000 times was performed on this support plate 1 with a bending radius R of 5 mm, the test was passed, there was no crack, and the recoverability to flatness was also good.

[0133] Hereinafter, several specific examples are provided to specifically explain the values of the above parameters. Each example takes, as an example, the projection shape of a plurality of through holes 10 on the first plane shown in FIG. 8 and the arrangement method in the patterning region 03. Regarding the through hole whose orthographic projection on the first plane is a closed shape , the projection shape of each through hole 10 on the first plane is the same, but the areas are not exactly the same.

[0134] For example, the maximum length A along the first direction X of a plurality of through holes 10 max is 5 mm, and the minimum value B of the second interval along the first direction X of each two adjacent through holes 10 among the through holes 10 in the same row min is 0.2 mm, and the minimum value C of the first interval along the second direction Y between any one through hole 10 in one row of through holes 10 and any one through hole 10 in the through holes 10 in the adjacent row min is 0.2 mm, and the maximum value D of the widths along the second direction Y of a plurality of through holes max is 0.2 mm, and the support plate body 1 1 has a thickness t of 0.2 mm and and set the bending radius R to 6 mm . According to the formula

Number

[0135] Also, for example, the maximum value A of the lengths along the first direction X of a plurality of through holes 10 maxis set to 5 mm, and the minimum value B of the second intervals along the first direction X of every two adjacent through-holes 10 among the through-holes 10 in the same column min is set to 0.2 mm, and the minimum value C of the first intervals along the second direction Y between any one through-hole 10 among the through-holes 10 in one column and any one through-hole 10 among the through-holes 10 in the adjacent column min is set to 0.2 mm, and the maximum value D of the widths along the second direction Y of the plurality of through-holes max is set to 0.2 mm, and the support plate body 1 1 has a thickness t of 0.2 mm and set the bending radius R to 3 mm . α is 21.333333, and it is calculated that α is less than 30. For this support plate 1, a bending test was carried out 200,000 times with a bending radius R of 3 mm, and the test was passed, there was no crack, and the recoverability to flatness was also good.

[0136] Also, for example, the maximum value A of the lengths along the first direction X of the plurality of through-holes 10 max is set to 5 mm, and the minimum value B of the second intervals along the first direction X of every two adjacent through-holes 10 among the through-holes 10 in the same column min is set to 0.1 mm, and the minimum value C of the first intervals along the second direction Y between any one through-hole 10 among the through-holes 10 in one column and any one through-hole 10 among the through-holes 10 in the adjacent column min is set to 0.1 mm, and the maximum value D of the widths along the second direction Y of the plurality of through-holes max is set to 0.1 mm, and the support plate body 1 1 has a thickness t of 0.1 mm and set the bending radius R to 1.5 mm . α is 5.333333, and it is calculated that α is less than 30. For this support plate 1, a bending test was carried out 200,000 times with a bending radius R of 1.5 mm, and the test was passed, there was no crack, and the recoverability to flatness was also good.

[0137] Also, for example, the maximum value A of the lengths along the first direction X of the plurality of through-holes 10 maxis set to 5 mm, and the minimum value B among the second intervals along the first direction X of every two adjacent through-holes 10 in the same column of through-holes 10 min is set to 0.1 mm, and the minimum value C among the first intervals along the second direction Y between any one through-hole 10 in a column of through-holes 10 and any one through-hole 10 in the column of through-holes 10 adjacent to it min is set to 0.1 mm, and the maximum value D among the widths along the second direction Y of a plurality of through-holes max is set to 0.2 mm, and the support plate body 1 1 has a thickness t of 0.15 mm and set the bending radius R to 2 mm . α is 4, and it is calculated that α is less than 30. For this support plate 1, when a bending test is carried out 200,000 times with a bending radius R of 2 mm, the test is passed, there is no crack, and the recoverability to flatness is also good.

[0138] Also, for example, the maximum value A among the lengths along the first direction X of a plurality of through-holes 10 max is set to 4.5 mm, and the minimum value B among the second intervals along the first direction X of every two adjacent through-holes 10 in the same column of through-holes 10 min is set to 0.2 mm, and the minimum value C among the first intervals along the second direction Y between any one through-hole 10 in a column of through-holes 10 and any one through-hole 10 in the column of through-holes 10 adjacent to it min is set to 0.15 mm, and the maximum value D of the widths along the second direction Y of the plurality of through-holes max is set to 0.2 mm, and the support plate body 1 1 has a thickness t of 0.15 mm and set the bending radius R to 3 mm. α is 12.3457, and it is calculated that α is less than 30. For this support plate 1, when a bending test is carried out 200,000 times with a bending radius R of 3 mm, the test is passed, there is no crack, and the recoverability to flatness is also good.

[0139] In some embodiments of the present disclosure, a foldable display is provided. As shown in FIG. 14, the foldable display includes the flexible display panel 2 in any one of the above embodiments and the support plate 1 described in any one of the above embodiments. The support plate 1 is provided on the side opposite to the light-emitting side of the flexible display panel 2.

[0140] As shown in FIG. 14, the flexible display panel 2 has a bending display portion 01. By bending the bending display portion 01, the folded state of the foldable display is achieved. Exemplarily, the flexible display panel 2 has one bending display portion 01. Also, exemplarily, the flexible display panel 2 has two or more bending display portions 01. The embodiments of the present disclosure are not limited to the number of bending display portions 01 that the flexible display panel 2 has and can be set as required. FIG. 14 shows an example in which the flexible display panel 2 has one bending display portion 01.

[0141] In the embodiments of the present disclosure, the support plate 1 is provided on the side opposite to the light-emitting side of the flexible display panel 2. On the one hand, the support plate 1 is configured to support the flexible display panel 2. On the other hand, after the foldable display is folded and unfolded again, unevenness occurs in the bending display portion 01, and the support plate 1 can improve the flatness of the foldable display after unfolding and the ability to recover to flatness after bending.

[0142] As shown in FIGS. 14 and 15, the orthographic projection of the bending display portion 01 of the flexible display panel 2 on the first plane overlaps with the orthographic projection of the patterning region 03 of the support plate 1 on the first plane. That is, the bending display portion 01 of the flexible display panel 2, when the flexible display panel 2 is unfolded, faces at least a part of the through holes 10 of one of the patterning regions 03 of the support plate 1. direction In the thickness direction of the support plate 1.

[0143] In this way, when the bent display portion 01 of the flexible display panel 2 is bent, the support plate 1 is bent along with the bent display portion 01, and the partial through hole 10 is deformed along with the bending of the support plate 1, thereby releasing the bending stress, improving the recovery ability of the support plate 1 to flatness after bending, and thus, in addition to the support plate 1 having the function of supporting the flexible display panel 2, the flatness after the foldable display is folded and unfolded again and the recovery ability to flatness after bending can be improved. Furthermore, the bending ability of the support plate 1 can improve the bending ability of the flexible display panel 2, and thus improve the folding effect of the foldable display.

[0144] In some examples, as shown in FIG. 14, the flexible display panel 2 further has non-bent display portions 02 located on both sides of the bent display portion 01 along the second direction Y. The support plate 1 has one patterning region 03, and the orthographic projection of the patterning region 03 on the first plane covers the orthographic projection of the bent display portion 01 of the flexible display panel 2 on the first plane. That is, in the state where the flexible display panel 2 is unfolded, the width of the patterning region 03 along the second direction Y is larger than the width of the bent display portion 01 along the second direction Y. In this way, when the bent display portion 01 of the flexible display panel 2 is bent, the plurality of through holes in the support plate 1 release the bending stress on any part of the bent display portion 01, and when the flexible display panel 2 is unfolded again, it enables the restoration of any part of the bent display portion 01 to flatness, thereby improving the display effect after the foldable display is folded and unfolded again. Also, when the width of the patterning region 03 along the second direction Y is larger than the width of the bent display portion 01 along the second direction Y, that is, some of the through holes 10 in the patterning region 03 release the bending stress at the boundary between the bent display portion 01 and the non-bent display portion 02, and when the flexible display panel 2 is bent, it improves the flatness and the recovery ability to flatness at the boundary between the bent display portion 01 and the non-bent display portion 02.

[0145] In some other examples, the support plate 1 has two patterning regions 03, and the orthographic projection of the bending display portion 01 of the flexible display panel 2 on the first plane has an overlapping portion with the orthographic projection of each patterning region 03 on the first plane. As shown in FIG. 15, this overlapping portion is located on both sides close to the non-bending display portion 02 side of the bending display portion 01. Thus, when the flexible display panel 2 is bent with a large bending radius, the middle portion of the bending display portion 01 hardly bends, that is, almost no stress concentration occurs in this middle portion, so there is no need to release the bending stress through the through holes 10.

[0146] In some examples, as shown in FIGS. 14 and 15, each through hole 10 extends in the first direction X (i.e., the direction perpendicular to the paper surface) in the first plane, and the flexible display portion 01 of the flexible display panel 2 is bent along a bending line parallel to the first direction X. Thereby, when the flexible display panel 2 is bent, each through hole 10 deforms along the second direction Y and deforms to the maximum extent to release the bending stress to the maximum extent, improve the restoration ability to flatness after the flexible display panel 2 is bent, and improve the display effect after the folding display is folded and unfolded again. The above is only a specific embodiment of the present disclosure, but the claims of the present disclosure are not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure are all included within the claims of the present disclosure. Therefore, the claims of the present disclosure shall be in accordance with the scope of the claims.

[0147] This application claims priority based on Chinese Patent Application No. 202020141702.2 filed on January 21, 2020 and Chinese Patent Application No. 202020486804.8 filed on April 4, 2020, and the entire disclosure content thereof is incorporated herein by reference.

Claims

1. A support plate body having at least one patterning region, A plurality of through holes provided in the at least one patterning region and penetrating the support plate body along the thickness direction of the support plate body, wherein a projection shape of each through hole in a first plane orthogonal to the thickness direction of the support plate body is strip-shaped, and the plurality of through holes, Each of the plurality of through holes extends along a first direction in the first plane, The plurality of through holes are arranged in a plurality of rows of through holes along a second direction, any two adjacent rows of through holes are provided at intervals, each row of through holes has at least one through hole arranged along the first direction, and the second direction is orthogonal to the first direction in the first plane, A maximum value A of lengths of the plurality of through holes along the first direction ｍａｘ And a minimum value C of a first interval along the second direction between any one through hole in one row of through holes and any one through hole in an adjacent row of through holes ｍｉｎ And a bending radius R at which the support plate body is bent along a bending line parallel to the first direction within at least one patterning region satisfy the following relational expression (1), A support plate in which a thickness t of the support plate body and the minimum value Cmin satisfy the following relational expression (2). 【Equation 1】 【Equation 2】 Here, the length of each through hole along the first direction is the maximum length of the through hole along the first direction, and the maximum value A ｍａｘ Is the maximum value among the plurality of maximum lengths, and the first interval along the second direction between any one through hole in one row of through holes and any one through hole in an adjacent row of through holes is the minimum first interval of the two through holes along the second direction, and the minimum value C ｍｉｎis the minimum value among a plurality of minimum first intervals, and the maximum value A ｍａｘ , the minimum value C ｍｉｎ , and the unit of the bending radius R is the same.

2. The projected shape of at least one of the plurality of through holes in the first plane is rectangular, and the support plate according to claim 1.

3. The projected shape of at least one of the plurality of through holes in the first plane is a chamfered rectangle, and the support plate according to claim 1.

4. The projected shape of at least one of the plurality of through holes in the first plane is a closed shape composed of two straight portions and two curved portions. The two straight portions both extend along a first direction, and each end of one straight portion is aligned with one end of the other straight portion in a second direction. The second direction is orthogonal to the first direction in the first plane. Each curved portion is connected to the end of each of the two straight portions that are aligned with each other. The support plate according to claim 1.

5. Each curved portion is a semi-circle, and the support plate according to claim 4.

6. Each column of through holes has a plurality of through holes arranged along the first direction, Among any two adjacent columns of through holes in the plurality of columns of through holes, any through hole other than the two outermost through holes in one column overlaps with the projection of two adjacent through holes in the other column in a second plane orthogonal to the second direction, Each of the two outermost through holes overlaps with the projection of one through hole or two adjacent through holes in the other column in a second plane orthogonal to the second direction. The support plate according to claim 1.

7. For the support plate according to claim 6, the projection on the second plane of the portion between any two through holes among the through holes in the one column is located at the center of the projection on the second plane of one of the through holes among the through holes in the other column.

8. The maximum value D among the widths along the second direction of the plurality of through holes ｍａｘ and the minimum value C ｍｉｎ satisfy the following relational expression for the support plate according to claim 1. 【Equation 3】 Here, the width along the second direction of each through hole is the maximum width along the second direction of the through hole, and the maximum value D is the maximum value among the plurality of maximum widths. ｍａｘ

9. The minimum value B among the second intervals along the first direction of each two adjacent through holes among the through holes in the same column ｍｉｎ and the minimum value C ｍｉｎ satisfy the following relational expression for the support plate according to claim 1 or 8. 【Equation 4】 Here, the second interval along the first direction of each two adjacent through holes is the minimum second interval along the first direction of the two through holes, and the minimum value B ｍｉｎ is the minimum value among the plurality of minimum second intervals.

10. The maximum value A ｍａｘ and the minimum value B ｍｉｎ satisfy the following relational expression for the support plate according to claim 9. 【Equation 5】

11. For the support plate according to any one of claims 1, 6 to 10, the first intervals along the second direction between any one of the through holes in one column and any one of the through holes in the adjacent column are equal.

12. The support plate according to any one of claims 1 to 11, wherein each of the plurality of through holes has the same projected shape in the first plane and the same area.

13. The support plate according to any one of claims 1, 8 to 12, wherein the maximum length of each through hole along the first direction is in the range of 1 to 50 mm, and the thickness t of the support plate body is in the range of 0.01 to 0.5 mm.

14. A flexible display panel having a bending display portion, The folding display includes the support plate according to any one of claims 1 to 13 provided on the side opposite to the light emitting side of the flexible display panel, and an orthographic projection of the bending display portion of the flexible display panel in the first plane overlaps an orthographic projection of each of the at least one patterning region in the first plane.

15. The folding display according to claim 14, wherein the at least one patterning region includes one patterning region, and an orthographic projection of the bending display portion of the flexible display panel in the first plane is located within the orthographic projection of this patterning region in the first plane.

16. The folding display according to claim 15, wherein each of the plurality of through holes extends along the first direction in the first plane, and the bending display portion of the flexible display panel is bent along a bending line parallel to the first direction.

Images