CN219246299U

CN219246299U - Supporting layer and folding terminal equipment

Info

Publication number: CN219246299U
Application number: CN202222394934.0U
Authority: CN
Inventors: 张玉军; 熊源
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2023-06-23
Anticipated expiration: 2032-05-10
Also published as: CN217640542U

Abstract

The embodiment of the application provides a supporting layer and folding terminal equipment, relates to the technical field of folding display, and can improve the volume yield of the supporting layer. The supporting layer comprises at least one bending part; the bending part comprises a plurality of first through hole columns, and each first through hole column comprises N rows of through holes which are mutually spaced; a second through hole column is arranged between at least two adjacent first through hole columns, each second through hole column comprises (N-1) rows of through holes which are mutually spaced, and the through holes in the first through hole columns and the second through hole columns are mutually staggered; in the first through hole column, the through holes in the first row and the N row are first through holes, and the length is H1; in the first through hole column, through holes of other rows except the first row and the last row, and through holes in the second through hole column are all second through holes, and the lengths of H2, H1 and H2 meet the following conditions: (1/2) H2 < H1 < H2; the area between two adjacent first through holes is an edge area; the edge region is provided with an opening in addition to the second through hole.

Description

Supporting layer and folding terminal equipment

The present application is a divisional application, the name of the original application being support layer and folding terminal equipment, the application number of the original application being 202221112270.8, the date of the original application being 2022, month 05, 10, the entire content of the original application being incorporated by reference in the present application.

Technical Field

The application relates to the technical field of folding display, in particular to a supporting layer and folding terminal equipment.

Background

With the continuous development of display technology, a folding terminal gradually becomes a development trend of future mobile electronic products. Under the unfolding state, the folding terminal can obtain a larger display area, and the visual effect is improved. The folding terminal can obtain smaller volume under the folding state, and is convenient for users to carry. As a result, folder terminals are increasingly favored by more and more users.

The display of a folder-type terminal is typically a flexible display. Because flexible display screen is softer, consequently, need support flexible display screen through the supporting layer to prevent that flexible display screen roughness from appearing ripple shape line, influence the quality of display screen.

However, the support layer has a problem of low mass production yield.

Disclosure of Invention

In order to solve the technical problem, the application provides a supporting layer and folding terminal equipment. The mass productivity of the support layer can be improved.

In a first aspect, embodiments of the present application provide a support layer including at least one bend; the bending part comprises a first edge and a second edge which are opposite; the bending part comprises a plurality of first through hole columns, each first through hole column comprises N rows of through holes which are mutually spaced, the arrangement direction of the N rows of through holes included in each first through hole column is a first direction, and the first direction is the direction that the first edge points to the second edge; n is a positive integer greater than or equal to 2; along a second direction, a second through hole column is arranged between at least two adjacent first through hole columns, each second through hole column comprises (N-1) rows of through holes which are mutually spaced, the arrangement direction of the (N-1) rows of through holes included in each second through hole column is the first direction, and the through holes in the first through hole column and the second through hole column are mutually staggered, wherein the second direction is a direction perpendicular to the first direction; in the first through hole column, through holes in the first row and the N row are first through holes, and the length of each first through hole is H1; in the first through hole column, through holes of other rows except the first row and the last row, and the through holes in the second through hole column are second through holes, the lengths of the second through holes are H2, and the lengths of H1 and H2 meet the following conditions: (1/2) H2 < H1 < H2; the area between two adjacent first through holes is an edge area along the second direction; in a first direction, the edge region comprises a continuous first edge sub-region and second edge sub-region; the subarea comprising the second through hole is a first edge subarea; the sub-region excluding the second through hole is a second edge sub-region; at least one opening is provided in the second edge sub-area.

Through set up the opening in the region that the supporting layer that is close to the edge remains, reduce the area in the region that the supporting layer of edge remains for the width in the region that the supporting layer of edge remains and the centre set up the width in through-hole region tend to be unanimous, avoid the supporting layer that is close to the edge to remain the region wider, lead to this region to take place deformation, improve the mass production yield of supporting layer.

In some possible implementations, the openings do not extend through the support layer to form grooves to reduce the gravity of the region and the contact area of the region, avoid heavy weight of the region, shift the center of gravity, and add etch area and intermediate inconsistencies, and the stress relief is different, resulting in deformation of the region.

In some possible implementations, on the basis that the opening is a groove, one end of the groove in the second edge sub-area between two adjacent first through holes in the first row is communicated with the second through hole in the first edge sub-area in the same edge area, and the other end is flush with the first edge; one end of the groove in the second edge sub-area between two adjacent first through holes in the N line is communicated with the second through holes in the first edge sub-area in the same edge area, the other end of the groove is flush with the second edge, the gravity of the area and the contact area of the area are further reduced, the area is prevented from being heavy, the gravity center is prevented from shifting, the etched area is inconsistent with the middle, the stress release degree is different, and the area is deformed.

In some possible implementations, the openings penetrate through the support layer, further reducing the gravity of the region and the contact area of the region, avoiding heavy weight in the region, shifting the center of gravity, adding to the etched area and the intermediate inconsistency, and varying the degree of stress relief, resulting in deformation of the region.

In some possible implementations, on the basis that the opening penetrates through the supporting layer, the opening in the second edge sub-area is communicated with the second through hole in the first edge sub-area in the same edge area, that is, the second through hole in the second through hole row extends to the second edge sub-area, so that the width of the supporting layer in the second edge sub-area is equal to the width of the supporting layer between two adjacent first through hole rows in the middle row, the contact area is equal, the gravity of the whole bending part is uniform, deformation of the area reserved by the supporting layer near the edge is avoided, and the process steps can be simplified.

In some possible implementations, on the basis that the openings penetrate through the supporting layer, the shortest distance between the openings and the first edge between two adjacent first through holes in the first row and the shortest distance between the openings and the second edge between two adjacent first through holes in the nth row are both the first preset distance, that is, the openings do not extend to the edge of the supporting layer, so that the area of the supporting layer in the sub-area of the second edge is reduced, and meanwhile, the capability of the area to bear external force is increased.

In some possible implementations, on the basis that the closest distance between the opening and the first edge between the two adjacent first through holes in the first row and the closest distance between the opening and the second edge between the two adjacent first through holes in the nth row are both a first preset distance, in the first direction, the length of the gap between the two adjacent through holes in the same through hole column is a second preset distance; the first preset distance is equal to the second preset distance, namely the structure of the first preset distance is basically the same as that of the middle section, so that the gravity of the bending part is uniform, the deformation of the reserved area of the support layer close to the edge is avoided, and the process steps can be simplified.

In some possible implementations, on the basis that the opening penetrates through the supporting layer, a connection structure is arranged between the supporting layers in the two adjacent second edge sub-areas, the supporting layers in the two adjacent second edge sub-areas are connected through the connection structure, and the supporting layers in the two adjacent second edge sub-areas interact with each other to improve the capability of the supporting layers in the two adjacent second edge sub-areas to bear external force.

In some possible implementations, on the basis of the connection structure provided between the support layers in the two adjacent second edge sub-areas, the length of the support layer in the second edge sub-area along the first direction is S3; the nearest distance from the connecting structure to the edge of the bending part is S4, and S3 and S4 satisfy: (1/10) S3. Ltoreq.S4. Ltoreq.1/5) S3, i.e. the area of the region where the edges of the support layer 50 remain is not large because the distance from the connection structure 515 to the edges of the support layer 50 is too small, nor is the interaction force between the support layers in the adjacent two second edge sub-regions RR2 reduced because the distance from the connection structure 515 to the edges of the support layer 50 is too large, resulting in an insignificant connection of the connection structure 515.

In some possible implementations, the cross-sectional profile of the opening includes a circle, square, rectangle, oval, racetrack, or the like.

In a second aspect, an embodiment of the present application provides a folder-type terminal device, including: a flexible display screen; the support layer of the first aspect is located at one side of the flexible display screen and is used for supporting the flexible display screen.

In some possible implementations, the folding terminal device further includes a structural assembly including at least one first body portion, at least one second body portion, and a folding mechanism between the first body portion and the second body portion; along a third direction, the flexible display screen comprises a display surface and a back surface, wherein the third direction is perpendicular to the first direction and perpendicular to the second direction; the flexible display screen comprises a first display part, a second display part and a third display part which are continuous; the first display part and the third display part are non-bending parts of the flexible display screen; the second display part is a bent part of the flexible display screen; the first body part is positioned at one side of the back surface of the first display part, which is away from the display surface, the folding mechanism is positioned at one side of the back surface of the second display part, which is away from the display surface, and the second body part is positioned at one side of the back surface of the third display part, which is away from the display surface; the support layer is positioned between the structural component and the flexible display screen; the support layer comprises a first flat part, a bending part and a second flat part which are continuous; the first flat part corresponds to the first display part and is used for supporting the first display part; the bending part corresponds to the second display part and is used for supporting the second display part; the second flat portion corresponds to the third display portion and is used for supporting the third display portion.

In some possible implementations, the openings do not extend through the support layer to form grooves; the support layer comprises a first surface and a second surface along a third direction; wherein the third direction is perpendicular to the first direction and perpendicular to the second direction; the notch of the groove is positioned on the first surface; the first face is located the one side that the second face deviates from flexible display screen, sets up the one side of recess promptly and does not contact with flexible display screen, improves the roughness of gentle thin display screen.

Drawings

FIG. 1 is a schematic view of a support layer;

fig. 2 is a schematic perspective view of a folding terminal device according to an embodiment of the present application;

fig. 3 is a side view of a folder-type terminal according to an embodiment of the present application;

fig. 4 is a side view of yet another folding terminal provided in an embodiment of the present application;

FIG. 5 is a cross-sectional view taken along the direction BB' of FIG. 2;

fig. 6 is a schematic structural diagram of a supporting layer according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a support layer according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural view of a support layer according to an embodiment of the present disclosure;

FIG. 9 is a cross-sectional view taken along the direction CC' of FIG. 8;

FIG. 10 is a schematic structural view of a support layer according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural view of a support layer according to an embodiment of the present disclosure;

FIG. 12 is a schematic view of a structure of a support layer according to an embodiment of the present disclosure;

fig. 13 is a partial enlarged view of the DD region in fig. 12.

Reference numerals illustrate:

10-a flexible display screen; 20-a first fuselage subsection; 30-a second fuselage subsection; 40-folding mechanism; 50-a support layer; 100-folding mobile phone;

11-a first display section; 12-a second display section; 13-a third display section;

51-a bending part; 52-a first flat portion; 53-a second flat portion; 54—a first edge; 55-a second edge; 511-a through hole; 511 a-a first via; 511 b-a second through hole; 512-a first row of vias; 513-a second row of vias; 514-opening; 515-connection structure; 5121-a first row of via holes; 5122-a second row of vias; 5123-third through-hole subcolumn; 5124-fourth through-hole subcolumn; 5125-fifth row of holes.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone.

The terms first and second and the like in the description and in the claims of embodiments of the present application are used for distinguishing between different objects and not necessarily for describing a particular sequential order of objects. For example, the first target object and the second target object, etc., are used to distinguish between different target objects, and are not used to describe a particular order of target objects.

In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In the description of the embodiments of the present application, unless otherwise indicated, the meaning of "a plurality" means two or more. For example, the plurality of processing units refers to two or more processing units; the plurality of systems means two or more systems.

Fig. 1 is a schematic structural view of a supporting layer, and as can be seen from fig. 1, the supporting layer 50 'includes a bending portion 51'. The bent portion 51 'is provided with a plurality of through holes parallel to each other, each of which includes a plurality of through holes 511' arranged at intervals from each other. The plurality of through holes 511' included in the adjacent two rows of through holes are arranged to be offset from each other. This arrangement is advantageous in improving the mechanical strength of the bent portion 51', thereby better supporting the portion of the flexible display screen corresponding to the bent portion 51' of the supporting layer 50', and improving the surface flatness of the folder type terminal device.

After the supporting layer 50 'is etched, it is found that the supporting layer 50' is inevitably touched to the edges of the two ends during the product transferring and taking process. Since the width (W1 in fig. 1) of the region (such as the portion of the QQ region in fig. 1) where the support layer near the edge remains is much larger than the width (sum of W2 and W3 in fig. 1) of the region where the through hole is provided in the middle, for example, W1 is approximately equal to 2.5 times the sum of W2 and W3, the contact area becomes large, and at the same time, this region is heavy, the center of gravity shifts, and various factors such as the etched area and the middle inconsistency, the stress release degree difference, and the like are added, the region where the support layer near the edge remains is liable to be deformed, for example, lifted, and the product is scrapped in the thickness direction of the support layer 50'. The bad loss of the part is up to 10-15% according to the monitoring of the yield of mass production.

Based on this, this application embodiment provides a supporting layer, through set up the opening in the region that the supporting layer that is close to the edge remains, reduces the area in the region that the supporting layer of edge remains for the width in the region that the supporting layer of edge remains and the middle width that sets up the through-hole region tend to agree, and the region that the supporting layer that avoids being close to the edge remains is wider, leads to this region to take place deformation, improves the mass production yield of supporting layer. The supporting layer is applied to folding terminal equipment, and supports the flexible display screen in the folding terminal equipment through the supporting layer. The folding terminal device may be, for example, a mobile phone, a computer, a tablet computer, a personal digital assistant (personal digital assistant, abbreviated as PDA), a vehicle-mounted computer, a television, an intelligent wearable device, an intelligent home device, etc., and the specific form of the folding terminal device is not limited in the embodiments of the present application.

The supporting layer provided in the embodiments of the present application is described in detail below in connection with a folder-type terminal device. As shown in fig. 2, for convenience of explanation, the following description will take an example in which the folder type terminal device is a folder type mobile phone.

For the sake of clarity in describing the following structural features and the positional relationships of the structural features, the positional relationships of the structures in the folding cellular phone are specified in the X-axis direction, the Y-axis direction, and the Z-axis direction. The X-axis direction (also called a second direction) is the width direction of the folded mobile phone after being unfolded, the Y-axis direction (also called a first direction) is the length direction of the folded mobile phone after being unfolded, and the Z-axis direction (also called a third direction) is the thickness direction of the folded mobile phone after being unfolded.

Referring to fig. 2, a folding cellular phone 100 includes a flexible display screen 10.

The flexible display 10 comprises, for example, an organic light emitting diode (Organic Light Emitting Diode, OLED) display. The OLED display screen does not need a backlight module, and a substrate in the OLED display screen can be made of flexible resin materials, such as polyethylene terephthalate (Polyethylene terephthalate, PET), so that the OLED display screen has the characteristic of being bendable. Of course, the types of flexible display 10 include, but are not limited to, OLED displays, as long as a bent display can be achieved, and are within the scope of the present application.

With continued reference to fig. 2, the folding handset further includes structural components. Along the X-axis direction, the structural assembly includes a first body portion 20, a second body portion 30, and a folding mechanism 40 located between the first body portion 20 and the second body portion 30, which folding mechanism 40 may include, for example, a rotating shaft. The rotary shafts are connected to the first body portion 20 and the second body portion 30, respectively. The first body portion 20, the shaft, the second body portion 30 may be used to carry the flexible display 10. The first body portion 20 and the second body portion 30 can rotate around the rotation axis, so as to realize the folding or unfolding state of the flexible display 10, and further realize the folding or unfolding state of the folding mobile phone.

Fig. 2 is a schematic diagram of the folding mobile phone after being unfolded. Fig. 3 and 4 are schematic diagrams of a folding mobile phone when folded. In fig. 3, when the folding cellular phone is folded, it can be folded toward the light emitting direction (indicated by an arrow in fig. 3) of the flexible display 10, that is, the direction in which the first body portion 20 and the second body portion 30 rotate about the rotation axis is the same as the light emitting direction of the flexible display 10. In fig. 4, when the folding cellular phone is folded, it may be folded in a direction (indicated by an arrow in fig. 4) away from the flexible display 10, that is, a direction in which the first body portion 20 and the second body portion 30 rotate about the rotation axis is opposite to the light emitting direction of the flexible display 10.

It should be noted that, the related drawings of the folding mechanism 40 in the embodiment of the present application are simplified schematic structural diagrams, and the folding mechanism 40 is not limited to the structures in the drawings, but may also include other structures, which are not described herein.

It should also be noted that the folding cellular telephone may be folded at a plurality of locations and that the corresponding structural assembly may include a plurality of folding mechanisms 40 and a plurality of fuselage sections. For example, two folding mechanisms 40 and three fuselage sections may be included, with two adjacent fuselage sections being connected by one folding mechanism 40, such that the folding handset has two folded positions. It can be seen that the structural assembly comprises at least one folding mechanism 40 and at least two fuselage sections, adjacent two fuselage sections being connected by one folding mechanism 40. For ease of description, the embodiments of the present application will be described with respect to a structural assembly that includes a folding mechanism 40 and two fuselage sections (i.e., a first fuselage section 20 and a second fuselage section 30).

Referring to fig. 5, the flexible display screen 10 includes a first display portion 11, a second display portion 12, and a third display portion 13 in succession along the X-axis direction. The first display portion 11 and the third display portion 13 may be non-curved portions of the flexible display screen 10. The second display 12 may be a curved portion in the flexible display 10.

Along the Z-axis direction, the flexible display screen 10 includes a display surface (also light-emitting surface) AA and a back surface NAA. The flexible display 10 may display images through the display surface AA. The back NAA may be a non-display surface that does not display an image.

Along the Z-axis direction, the first body 20 is located at a side of the back NAA of the first display 11 facing away from the display surface AA, the folding mechanism 40 is located at a side of the back NAA of the second display 12 facing away from the display surface AA, and the second body 30 is located at a side of the back NAA of the third display 13 facing away from the display surface AA.

With continued reference to fig. 5, the folding cellular telephone further includes a support layer 50 positioned between the structural assembly and the flexible display screen 10 for supporting the flexible display screen 50. The support layer 50 includes, for example, a metal plate, and a material of the metal plate includes, for example, copper, titanium alloy, or the like. Optionally, the folding cellular phone further includes a substrate (not shown) positioned between the support layer 50 and the flexible display screen 10. The material of the base material may include, for example, polyethylene terephthalate (Polyethylene erephthalate, PET), polyimide (PI), foam, and the like. The support layer 50 is fixed to the substrate, for example, by an optical adhesive or a sub-sensitive adhesive, or the like.

The support layer 50 may include a continuous first flat portion 52, a bent portion 51, and a second flat portion 53. The first flat portion 52 corresponds to the first display portion 11, and supports the first display portion 11. The bending portion 51 corresponds to the second display portion 12 and supports the second display portion 12. The second flat portion 53 corresponds to the third display portion 13 and supports the third display portion 13.

The first flat portion 52 corresponds to the first display portion 11: the orthographic projection of the first display portion 11 on the XY plane overlaps with the orthographic projection of the first flat portion 52 on the XY plane, for example, the orthographic projection of the first display portion 11 on the XY plane is located within the orthographic projection of the first flat portion 52 on the XY plane. The bent portion 51 corresponds to the second display portion 12: the orthographic projection of the second display portion 12 on the XY plane overlaps with the orthographic projection of the bending portion 51 on the XY plane, for example, the orthographic projection of the second display portion 12 on the XY plane is located within the orthographic projection of the bending portion 51 on the XY plane. The second flat portion 53 corresponds to the third display portion 13: the orthographic projection of the third display portion 13 on the XY plane overlaps with the orthographic projection of the second flat portion 53 on the XY plane, for example, the orthographic projection of the third display portion 13 on the XY plane is located within the orthographic projection of the second flat portion 53 on the XY plane.

Referring to fig. 6, in the X-axis direction, the bending portion 51 of the supporting layer 50 includes a plurality of first through hole columns 512.

Along the Y-axis direction, the support layer 50 includes opposite first and

second edges

54 and 55, wherein the first and

second edges

54 and 55 are also the first and second edges of the bent portion 51.

Each first via column 512 includes N rows of vias 511 spaced apart from each other, and an arrangement direction of the N rows of vias 511 included in each first via column 512 is a Y-axis direction, that is, N vias 511 in each first via column 512 are arranged from the first edge 54 to the second edge 55, where N is a positive integer greater than or equal to 2. Along the X-axis direction, a second via column 513 is disposed between at least two adjacent first via columns 512, each second via column 513 includes (N-1) rows of vias 511 spaced apart from each other, the arrangement direction of the (N-1) rows of vias 511 included in each second via column 513 is also the Y-axis direction, and vias 511 in the first via columns 512 and the second via columns 513 are disposed in a staggered manner. In addition, the distances between the adjacent two first via columns 512 are equal, the distances between the adjacent two second via columns 513 are equal, and the distances from the second via column 513 to the adjacent two first via columns 512 thereof are equal along the X-axis direction.

Illustratively, with continued reference to FIG. 6, the fold 51 of the support layer includes five first rows 512 of vias along the X-axis. The five first via columns 512 are a first via sub-column 5121, a second via sub-column 5122, a third via sub-column 5123, a fourth via sub-column 5124, and a fifth via sub-column 5125, respectively. Each first via hole column 512 includes three rows of via holes 511 spaced apart from each other, and an arrangement direction of the three rows of via holes 511 included in each first via hole column 512 is a Y-axis direction. A second through hole row 513 is disposed between at least two adjacent first through hole rows 512 along the X-axis direction, that is, a second through hole row 513 is disposed between the first through hole row 5121 and the second through hole row 5122, between the second through hole row 5122 and the third through hole row 5123, between the third through hole row 5123 and the fourth through hole row 5124, and between the fourth through hole row 5124 and the fifth through hole row 5125. Each second via column 513 includes two rows of vias 511 spaced apart from each other, the arrangement direction of the two rows of vias 511 included in each second via column 513 is also the Y-axis direction, and the vias 511 in the first via column 512 and the second via column 513 are staggered from each other.

The arrangement of the through holes 511 in the first through hole row 512 and the second through hole row 513 in a staggered manner is that: a portion of the through holes 511 of the i-th row of the previous column overlaps with the through holes 511 of the i-th row of the column on the orthographic projection of the YZ plane, and another portion of the through holes 511 of the i-th row of the previous column overlaps with the through holes 511 of the (i+1) -th row of the column on the orthographic projection of the YZ plane, wherein i is a positive integer greater than or equal to 1 and less than or equal to (N-1).

Note that, the second through hole columns 513 may be disposed between at least two adjacent first through hole columns 512, and the second through hole columns 513 may be disposed between only two adjacent first through hole columns 512, as shown in fig. 6; it is also possible that, in addition to the second via columns 513 being provided between the adjacent two first via columns 512, one second via column 513 is provided on the left side of the first via sub-column 5121 and/or one second via column 513 is provided on the right side of the fifth via sub-column 5125, as shown in fig. 7.

The cross-sectional profile of the through hole 511 on the XY plane includes, for example, a racetrack shape, an elliptical shape rectangular, diamond-shaped, circular, or a combination of at least two of the foregoing, and the like. The shape formed by combining at least two of them includes, for example, a shape formed by combining three racetrack shapes and one rectangle, or a shape formed by combining two racetrack shapes, one circle and one rectangle, or a shape formed by combining two racetrack shapes, one ellipse and one rectangle, or the like.

It will be appreciated that the racetrack shape may be: the two arcs are opposite to the rectangular shape of the surrounding areas on two opposite sides, wherein the two arcs are opposite to each other and are respectively adjacent to the two opposite sides. The three racetrack shapes and one rectangle are formed along the Y-axis direction, wherein the two racetrack shapes are respectively positioned at two ends of the rectangle, and the other racetrack shape is positioned in the middle of the rectangle, as shown in fig. 6 or 7. The combination of two racetrack shapes, a circle and a rectangle is formed along the Y-axis direction, wherein the two racetrack shapes are respectively positioned at two ends of the rectangle, and the circle is positioned in the middle of the rectangle (not shown in the figure). The combination of two racetrack shapes, an ellipse and a rectangle is formed along the Y-axis direction, wherein the two racetrack shapes are respectively positioned at two ends of the rectangle, and the ellipse is positioned in the middle of the rectangle (not shown in the figure).

Here, the present embodiment will be described by taking, as an example, a configuration in which the cross-sectional profile of the through hole 511 on the XY plane is formed in three racetrack shapes and one rectangle shape.

With continued reference to fig. 6, in the first via column 512, the vias located in the first and nth rows are first vias 511a, and the length of the first via 511a is H1; in the first via column 512, the vias of the other rows except the first row and the last row are the second vias 511b, and the lengths of the second vias 511b are H2, and H1 and H2 satisfy: (1/2) H2 < H1 < H2. In addition, the through holes 511 located in the second through hole column 513 are also second through holes 511b. That is, in fig. 6, all the through holes of the first row and all the through holes of the third row in the first, second, third, fourth, and fifth through hole sub-columns 5121, 5122, 5123, 5124, and 5125 are the first through holes 511a, and all the through holes of the second row in the first, second, third, fourth, and fifth through hole sub-columns 5121, 5122, 5123, 5124, and 5125 are the second through holes 511b. That is, since the length of the region where the through holes 511 located in the first and nth rows are located is shorter than the length of the region where the other through holes 511 are located in the first through hole column 512, the entire through hole 511 cannot be provided, and only a part of the through holes 511 (this part is referred to as a first through hole 511 a) can be provided, the length of a part of the through holes 511 is H1, and the lengths of the entire through holes are H2, H1 and H2 satisfy: (1/2) H2 < H1 < H2.

When H1 and H2 satisfy: (1/2) H2 < H1 < H2, the region between the first through holes 511a of the adjacent two columns is the edge region RR. Illustratively, the area between adjacent two first through holes 511a of the first and third rows in the first and second through hole sub-columns 5121 and 5122, the area between adjacent two first through holes 511a of the first and third rows in the third and second through hole sub-columns 5123 and 5122, the area between adjacent two first through holes 511a of the first and third rows in the third and fourth through hole sub-columns 5123 and 5124, and the area between adjacent two first through holes 511a of the first and third rows in the fifth and fourth through hole sub-columns 5125 and 5124 are all edge areas RR.

Along the Y-axis direction, the edge region RR includes a continuous first edge sub-region RR1 and second edge sub-region RR2; the sub-region of the second via 511b including the second via column 513 is the first edge sub-region RR1; the sub-region of the second via 511b excluding the second via column 513 is the second edge sub-region RR2 (also the QQ region in fig. 1); at least one opening 514 is provided in the second edge sub-region RR 2. The opening 514 is configured to reduce the area of the support layer located in the second edge sub-region RR2, so that the width of the support layer located in the second edge sub-region RR2 is approximately equal to the width of the support layer located between two adjacent columns of the first through hole columns 512 in the middle row, so that the area reserved by the support layer near the edge is prevented from being wider, deformation of the area is caused, and the mass production yield of the support layer is improved.

As for the cross-sectional profile of the opening 514 in the XY axis, the cross-sectional profile of the opening 514 in the XY axis is not limited in the embodiment of the present application, and may be set by those skilled in the art according to actual situations. Illustratively, the cross-sectional profile of the opening 514 in the XY-axis includes, for example, a circle, square, rectangle, oval, racetrack, etc. Fig. 6 illustrates an example in which the cross-sectional profile of the opening 514 along the XY axis is circular.

It should be noted that, along the Z-axis direction, the opening 514 may penetrate through the supporting layer 50, for example, see fig. 6; it is also possible not to penetrate the support layer 50 to form grooves, see for example fig. 8 and 9.

When the opening 514 is a groove, referring to fig. 10, one end of the groove located between two adjacent first through holes 511a of the first row communicates with the second through hole column 513 in the first row, and the other end of the second through hole 511b of the first row is flush with the first edge 54 in the first through hole column 512. One end of the groove located between two adjacent first through holes 511a in the nth row of the first through hole row 512 communicates with the second through hole row 513, and the other end of the second through hole 511b in the (N-1) th row is flush with the second edge 55. By the arrangement, the area of the supporting layer positioned in the second edge subregion RR2 can be further reduced, the area reserved by the supporting layer close to the edge is prevented from being wider, the area is deformed, and meanwhile, the capacity of the area for bearing external force can be increased.

When the opening 514 penetrates the supporting layer 50, referring to fig. 11, one end of the groove in the second edge sub-region RR2 located between two adjacent first through holes 511a in the first row is communicated with the second through hole 511b in the first edge sub-region RR1 in the same edge region RR, and the other end is flush with the first edge 54. That is, in the first via hole column 512, the opening 514 between two adjacent first via holes 511a in the first row communicates with the second via hole 511b in the first row in the second via hole column 513. That is, in the second via column 513, the second via 511b located in the first row extends into the first via column 512, and is located in the region between two adjacent first vias 511a of the first row (i.e., the second edge sub-region RR 2).

One end of the groove in the second edge sub-region RR2 located between two adjacent first through holes 511a of the nth row communicates with the second through hole 511b located in the first edge sub-region RR1 of the same edge region RR, and the other end is flush with the second edge 55. That is, in the first via hole column 512, the opening 514 between two adjacent first via holes 511a in the nth row communicates with the second via hole 511b in the (N-1) th row in the second via hole column 513. That is, in the second via hole column 513, the second via holes 511b located in the (N-1) -th row extend into the first via hole column 512, and the region of the opening (i.e., the second edge sub-region RR 2) located between the adjacent two first via holes 511a of the N-th row.

The arrangement is such that the width of the support layer within the second edge sub-region RR2 is equal to the width of the support layer between two adjacent first via columns 512 in the middle row. I.e. the width (W1 in fig. 1) of the region where the support layer near the edge remains (e.g. the portion of the QQ region in fig. 1) is made to coincide with the width (sum of W2 and W3 in fig. 1) of the region where the through hole is provided in the middle, deformation of the region where the support layer near the edge remains is avoided, and the process steps can also be simplified.

When the opening 514 penetrates the supporting layer 50, referring to fig. 11, the shortest distance between the opening 514 and the first edge 54 between two adjacent first through holes 511a in the first row and the shortest distance between the opening 514 and the second edge 55 between two adjacent first through holes 511a in the nth row are both a first preset distance S1, where specific values of the first preset distance S1 are not limited in this embodiment, and may be set by those skilled in the art according to practical situations. Illustratively, the gaps between two adjacent through holes 511 are located in the same column and have a length of a second preset distance S2. The first preset distance S1 is for example equal to the second preset distance S2. That is, the opening 514 does not extend to the edge of the support layer 50, and thus, the area of the support layer located in the second edge sub-region RR2 is reduced, and the capability of the region to withstand external force is increased.

Here, fig. 11 is a diagram illustrating an example in which the opening 514 communicates with the second through hole 511b. Of course, when the opening 514 is not in communication with the second through hole 511b, the relationship between the opening 514 and the first and

second edges

54 and 55 is also satisfied, and will not be described herein.

In addition, in order to further enhance the ability of the second edge sub-region RR2 to withstand external forces. Referring to fig. 12 and 13, a connection structure 515 is provided between the support layers in the adjacent two second edge sub-regions RR2, and the support layers in the adjacent two second edge sub-regions RR2 are connected through the connection structure 515, and the support layers in the adjacent two second edge sub-regions RR2 interact with each other to improve the ability of the support layers in the adjacent two second edge sub-regions RR2 to withstand external forces. That is, while the area of the support layer of the second edge sub-region RR2 is reduced, the area where the support layer near the edge remains is prevented from being wider, resulting in deformation of the area, and the ability of the area to withstand external forces can be increased.

In this case, the length of the second edge sub-region RR2 is S3, the distance of the connection structure 515 from the edge of the support layer 50 is S4, and S3 and S4 satisfy: (1/10) S3. Ltoreq.S4. Ltoreq.1/5) S3 is set so that the area of the region where the edge of the support layer 50 remains is not large because the distance from the connection structure 515 to the edge of the support layer 50 is too small, and the interaction force between the support layers in the adjacent two second edge sub-regions RR2 is not reduced because the distance from the connection structure 515 to the edge of the support layer 50 is too large, resulting in insignificant connection of the connection structure 515. Therefore, the preferred settings S3 and S4 of this embodiment satisfy: (1/10) S3. Ltoreq.S4. Ltoreq.1/5) S3 to avoid a larger area of the region where the edges of the support layer 50 remain while ensuring the interaction force between the support layers in the adjacent two second edge sub-regions RR 2.

The above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A support layer, comprising: at least one bending part; the bending part comprises a first edge and a second edge which are opposite;

the bending part comprises a plurality of through holes, adjacent through holes are spaced by a reserved area of the supporting layer, and an opening is formed in the reserved area close to the first edge and/or the second edge.

2. The support layer of claim 1, wherein the plurality of through holes are distributed in the bending portion, the plurality of through holes are arranged at intervals along a first direction, and projections of the plurality of through holes do not completely coincide in a second direction;

the first direction is the long side direction of the bending part, and the second direction is perpendicular to the first direction.

3. The support layer of claim 2, wherein the bent portion comprises a plurality of first through-hole columns and a plurality of second through-hole columns, each of the first through-hole columns comprising a plurality of through-holes arranged at intervals in the first direction, each of the second through-hole columns comprising a plurality of through-holes arranged at intervals in the first direction;

in the second direction, the first through hole columns and the second through hole columns are staggered, and the projections of the through holes in the first through hole columns and the through holes in the second through hole columns are not completely overlapped;

the reserved area provided with openings is located between two adjacent first through hole columns or between two adjacent second through hole columns.

4. A support layer according to claim 3, wherein in the first row of through holes, the through holes in the first and nth rows are first through holes; in the first through hole column, the through holes of other rows except the first row and the last row are second through holes;

the area between two adjacent first through holes is an edge area along the second direction;

along the first direction, the edge region includes a continuous first edge sub-region and second edge sub-region;

the subarea comprising the second through hole is the first edge subarea; the sub-region excluding the second through hole is the second edge sub-region;

at least one opening is provided in the second edge sub-area.

5. The support layer of claim 4, wherein the first via has a length H1 and the second via has a length H2, H1 and H2 satisfying: (1/2) H2 < H1 < H2.

6. The support layer of claim 4, wherein the openings do not extend through the support layer to form grooves.

7. The support layer of claim 6, wherein one end of a groove in a second edge sub-area between two adjacent first through holes in a first row communicates with a second through hole in the first edge sub-area of the same edge area, and the other end is flush with the first edge;

one end of the groove in the second edge sub-area between two adjacent first through holes in the N line is communicated with the second through holes in the first edge sub-area in the same edge area, and the other end of the groove is flush with the second edge.

8. The support layer of claim 4, wherein the opening extends through the support layer.

9. The support layer of claim 8, wherein the opening in the second edge sub-area communicates with a second via in the first edge sub-area in the same edge area.

10. The support layer according to claim 8 or 9, wherein the closest distance between the openings between two adjacent first through holes in the first row and the first edge and the closest distance between the openings between two adjacent first through holes in the N-th row and the second edge are both a first predetermined distance.

11. The support layer of claim 10, wherein a length of a gap between two adjacent through holes in the same through hole row along the first direction is a second predetermined distance; the first preset distance is equal to the second preset distance.

12. The support layer of claim 8, wherein a connection structure is provided between the support layers in adjacent two of the second edge sub-regions.

13. The support layer of claim 12, wherein the support layer in the second edge sub-region has a length S3 along the first direction; the nearest distance from the connecting structure to the edge of the bending part is S4, and S3 and S4 satisfy the following conditions: (1/10) S3 is less than or equal to S4 is less than or equal to (1/5) S3.

14. The support layer of claim 1, wherein the cross-sectional profile of the opening comprises a circle, square, rectangle, oval, or racetrack shape.

15. A folding terminal device, comprising:

a flexible display screen;

the support layer of any one of claims 1-14, located on one side of the flexible display screen for supporting the flexible display screen.

16. The folding terminal device of claim 15, further comprising a structural assembly including at least one first body portion, at least one second body portion, and a folding mechanism between the first body portion and the second body portion;

the flexible display screen comprises a display surface and a back surface along a third direction, wherein the third direction is perpendicular to the first direction and perpendicular to the second direction; the first direction is the long side direction of the folding mechanism, and the second direction is perpendicular to the first direction; the flexible display screen comprises a first display part, a second display part and a third display part which are continuous; the first display part and the third display part are non-bending parts of the flexible display screen; the second display part is a bent part of the flexible display screen;

the first body part is positioned at one side of the back surface of the first display part, which is away from the display surface, the folding mechanism is positioned at one side of the back surface of the second display part, which is away from the display surface, and the second body part is positioned at one side of the back surface of the third display part, which is away from the display surface;

the support layer is positioned between the structural component and the flexible display screen;

the support layer comprises a first continuous flat part, a bending part and a second continuous flat part;

the first flat part corresponds to the first display part and is used for supporting the first display part;

the bending part corresponds to the second display part and is used for supporting the second display part;

the second flat portion corresponds to the third display portion and is used for supporting the third display portion.

17. The folding terminal device of claim 15, wherein the opening does not extend through the support layer to form a recess;

in a third direction, the support layer includes a first face and a second face; wherein the third direction is perpendicular to the first direction and perpendicular to the second direction; the first direction is the long side direction of the folding mechanism, and the second direction is perpendicular to the first direction;

the notch of the groove is positioned on the first surface;

the first face is located on one side of the second face away from the flexible display screen.