Foldable display screen and foldable electronic device

Abstract

A foldable display screen (100) and a foldable electronic device (000). The foldable display screen (100) comprises a display layer (110) and a support layer (120). The display layer (110) comprises a first bending portion (114), a second bending portion (115), and a first display portion (111) connected between the first bending portion (114) and the second bending portion (115). The foldable display screen (100) can be folded or unfolded by means of the first bending portion (114) and the second bending portion (115); and when the foldable display screen (100) is in a folded state, the first display portion (111) is unfolded. When the foldable display screen (100) is in an unfolded state, a display surface of the first bending portion (114), a display surface of the first display portion (111), and a display surface of the second bending portion (115) are sequentially arranged in the same plane in a first direction. The support layer (120) is disposed on a non-display side of the display layer (110). The support layer (120) comprises a first support portion (121) corresponding to the first display portion (111). The first support portion (121) is provided with an opening area (121a), and the opening area (121a) is provided with through-holes (121c). The foldable display screen (100) can reduce the reverse camber height of a second bending portion (115) during the folding process, thereby reducing the risk of screen cracking and optical adhesive delamination.

Description

Foldable display screen and foldable electronic device TECHNICAL FIELD

[0001] The application belongs to the technical field of foldable screens, and particularly relates to a foldable display screen and an electronic device. BACKGROUND

[0002] With the pursuit of large screens, more and more manufacturers have launched foldable electronic devices supporting three folds and more than three folds. Such electronic devices are referred to as multi-fold electronic devices in the application. The multi-fold electronic devices can provide a larger display widening ratio and have a wide application prospect.

[0003] In the folding process of the multi-fold electronic device, a large arching is prone to occur in the bending area of the display screen, thereby causing screen cracking and optical adhesive peeling.

[0004] SUMMARY

[0005] The application provides a foldable display screen and a foldable electronic device, which can reduce the arching height of the bending area of the display screen in the folding process of the multi-fold electronic device, thereby reducing the risk of screen cracking and optical adhesive peeling and improving the reliability of the foldable display screen.

[0006] To achieve the above-mentioned purpose, the embodiments of the application adopt the following technical solutions:

[0007] In a first aspect, the application provides a foldable display screen. The foldable display screen comprises a display layer and a support layer. The display layer comprises a first bending part, a second bending part and a first display part connected between the first bending part and the second bending part. The foldable display screen can be folded or unfolded through the first bending part and the second bending part. When the foldable display screen is in a folded state, the first display part is flattened. When the foldable display screen is in a flattened state, the display surface of the first bending part, the display surface of the first display part and the display surface of the second bending part are arranged in sequence in the same plane along a first direction. The support layer is arranged on the non-display side of the display layer. The support layer comprises a first support part corresponding to the first display part, i.e. the region of the support layer facing the first display part in the thickness direction of the foldable display screen. The first support part is provided with an opening area having a through hole.

[0008] It should be noted that the arching is protruded towards the display side of the foldable display screen, i.e. protruded away from the hinge of the foldable electronic device when the foldable display screen is applied to the foldable electronic device. Therefore, the arching is also referred to as reverse arching in the embodiments of the application, and the arching height is also referred to as reverse arching height.

[0009] In the foldable display screen, the bending equivalent modulus of the opening area can be reduced by providing the opening area with the through hole on the first support part.

[0010] The bending equivalent modulus is a parameter used in structural engineering to describe the ability of a material to resist deformation under bending loads. The lower the bending equivalent modulus, the more likely it is to deform under bending forces, which means that such structures can absorb more energy during bending and exhibit better flexibility.

[0011] In the folding process of the foldable display screen (such as in a half-folded state), taking the first bending area of the foldable display screen as an example, when the redundant amount caused by the first bending area is transmitted to the opening area, the opening area deforms due to the decrease in the bending equivalent modulus of the opening area, and the upper display layer is deformed together, thereby absorbing part of the redundant amount that would otherwise move to the second bending area of the foldable display screen and cause the second bending area to arch, thereby reducing the arch height of the second bending area. As the arch height of the second bending area decreases, the risk of screen cracking and optical adhesive peeling is reduced, and the reliability of the foldable display screen is improved.

[0012] It should be noted that in some other embodiments, the second bending area can also be bent first during the folding process of the foldable display screen, and the embodiments of the present application do not limit this.

[0013] In some embodiments of the present application, the opening area and the first support portion each have a width in the first direction. The width of the opening area is 10% to 50% of the width of the first support portion. For example, the width of the opening area is 10%, 15%, 20%, 31%, 45%, or 49% of the width of the first support portion.

[0014] It should be noted that if the width of the opening area is too low, the reduction effect of the bending equivalent modulus of the opening area is not significant, and the arch height of the second bending portion cannot be reduced to a relatively safe value. Conversely, if the width of the opening area is too high, the strength of the opening area will be greatly reduced, thereby weakening the supporting effect of the first support portion on the first display portion.

[0015] Therefore, in the present embodiment, the width of the opening area is set to be 10% to 50% of the width of the first support portion, which can effectively absorb the redundant amount to reduce the arch height of the second bending area to a relatively safe value, and also ensure the strength of the opening area.

[0016] In some embodiments of the present application, in the first direction, the opening area is centrally arranged on the first support portion.

[0017] It should be noted that, in the first direction, the closer the layers of the foldable display are to the second bending area, the greater the misalignment; the farther away from the second bending area, the smaller the misalignment. Based on this, the closer the opening area is to the second bending area in the first direction, the more redundant data it absorbs, resulting in a higher anti-arching height at the corresponding location of the foldable display, and a higher risk of screen breakage and optical adhesive peeling at that location. Conversely, the farther the opening area is from the second bending area in the first direction, the less redundant data it absorbs, resulting in a smaller reduction in the anti-arching height of the second bending area, and a higher risk of screen breakage and optical adhesive peeling at that location.

[0018] In this embodiment, in the first direction, the opening area is centrally located on the first support, absorbing a moderate amount of redundancy. While reducing the anti-arch height of the second bending area, the anti-arch height of the foldable display screen at the corresponding opening area will not be too high. This makes it less likely for the foldable display screen to crack or for the optical adhesive to peel off at the second bending area and at the corresponding opening area.

[0019] In some embodiments of this application, the flexural equivalent modulus of the opening region is less than 50 MPa. Exemplarily, the flexural equivalent modulus of the opening region is 25 MPa, 30 MPa, 35 MPa, or 45 MPa.

[0020] In this embodiment, the bending equivalent modulus of the opening area is less than 50MPa, which allows the redundant amount absorbed by the opening area to reduce the anti-arching height of the second bending area to a relatively safe value, that is, a value that is not enough to cause screen cracking and optical adhesive peeling, for example, the anti-arching height is reduced to 0.02mm.

[0021] In some embodiments of this application, the opening area is provided with multiple rows of through holes spaced apart in a first direction, each row of through holes including one or more through holes spaced apart in a second direction. The second direction is a direction perpendicular to the first direction within the aforementioned plane.

[0022] In this embodiment, when multiple rows of through holes are spaced apart in the opening area in the first direction, the absorbed redundancy can be distributed to multiple positions in the opening area in the first direction. When the opening area deforms, the stress distribution in the first direction is more dispersed and uniform, which can reduce the phenomenon of foldable display screen breakage caused by excessive local deformation due to stress concentration.

[0023] When each column of through-holes includes multiple through-holes spaced apart in the second direction, the absorbed redundancy can be distributed to multiple locations in the opening area along the Y-axis. When the opening area deforms, the stress distribution in the second direction is more dispersed and uniform, reducing the phenomenon of foldable display screen breakage caused by excessive local deformation due to stress concentration. Based on this, this embodiment can reduce the risk of screen cracking and optical adhesive peeling at the corresponding opening area of ​​the foldable display screen.

[0024] In some embodiments of this application, the through holes in adjacent rows are staggered. This staggered arrangement allows for a more dispersed connection area between the through holes in the opening region. Consequently, when the opening region deforms, the stress distribution is more dispersed and uniform, reducing the likelihood of stress concentration causing excessive local deformation and resulting in breakage of the foldable display screen. Therefore, this embodiment can reduce the risk of screen cracking and optical adhesive peeling at the corresponding opening area of ​​the foldable display screen.

[0025] In some embodiments of this application, when the foldable display screen switches from a flattened state to a folded state, the first bending portion is in a bent state before the second bending portion. In the direction from the first bending portion to the second bending portion, the width of the through holes between different columns decreases sequentially.

[0026] In this embodiment, in the direction from the first bend to the second bend, the width of the through holes in each column decreases sequentially, and the bending equivalent modulus of the opening area also gradually decreases in this direction. This allows the opening area to gradually transition from smaller deformation to larger deformation along this direction, thereby pushing the redundancy towards the side where the first bend area is located, thus reducing the redundancy transmitted to the second bend area. Based on this, this embodiment can reduce the risk of screen breakage and optical adhesive peeling in the second bend area of ​​the foldable display.

[0027] In some embodiments of this application, the length of the through holes between different columns decreases sequentially in the direction from the first bend to the second bend.

[0028] In this embodiment, in the direction from the first bend to the second bend, the length of the through holes in each column decreases sequentially, and the bending equivalent modulus of the opening area also gradually decreases in this direction. This allows the opening area to gradually transition from smaller deformation to larger deformation along this direction, thereby pushing the redundancy towards the side where the first bend area is located, thus reducing the redundancy transmitted to the second bend area. Based on this, this embodiment can reduce the risk of screen breakage and optical adhesive peeling in the second bend area of ​​the foldable display.

[0029] In some embodiments of this application, when the foldable display screen switches from a flattened state to a folded state, either the first bending portion or the second bending portion is in the bending state before the other bending portion. That is to say, the folding order of the foldable display screen is not important.

[0030] In this case, the multi-row through-holes include a first row of through-holes to a Nth row of through-holes arranged sequentially along the direction from the first bend to the second bend. Among the first row of through-holes to the jth row of through-holes, the first dimension of the through-holes between different rows decreases sequentially along the direction from the first bend to the second bend; among the jth row of through-holes to the Nth row of through-holes, the second dimension of the through-holes between different rows increases sequentially along the direction from the first bend to the second bend. Here, j is an integer less than N and greater than 1, and N is an integer greater than 2. The first dimension and the second dimension are length and / or width.

[0031] For example, the first dimension is length and width, and the second dimension is length and width.

[0032] For example, the first dimension is the length, and the second dimension is the length and width.

[0033] For example, the first dimension is the length and width, and the second dimension is the length.

[0034] For example, the first dimension is the width, and the second dimension is the length and width.

[0035] For example, the first dimension is the length and width, and the second dimension is the width.

[0036] For example, the first dimension is the length and the second dimension is the width.

[0037] For example, the first dimension is the width and the second dimension is the length.

[0038] In this embodiment, when the first bending area bends first (i.e., the first bending portion bends first), the opening area pushes the redundant amount towards the side where the first bending area is located through the first column of through holes to the j-th column of through holes, thereby reducing the redundant amount transmitted to the second bending area and thus reducing the risk of screen breakage and optical adhesive peeling of the foldable display in the second bending area; when the second bending area bends first (i.e., the second bending portion bends first), the opening area pushes the redundant amount towards the side where the second bending area is located through the j-th column of through holes to the N-th column of through holes, thereby reducing the redundant amount transmitted to the second bending area and thus reducing the risk of screen breakage and optical adhesive peeling of the foldable display in the first bending area.

[0039] In some embodiments of this application, the first column of through holes to the j-th column of through holes are axially symmetrical with the j-th column of through holes to the N-th column of through holes.

[0040] In some embodiments of this application, the through-hole is an elongated hole, and the length of the through-hole extends in a second direction, which is a direction perpendicular to the first direction in a plane. In this embodiment, the length direction of the through-hole is in the second direction, making the opening area less resistant to deformation in the first direction. The first direction is the bending direction of the foldable display screen. When the foldable display screen is bent in the first direction, the opening area is more likely to deform in the first direction, thereby more easily absorbing the redundancy generated when bending the first bending area, and thus reducing the risk of screen breakage and optical adhesive peeling in the second bending area of ​​the foldable display screen.

[0041] In some embodiments of this application, the ratio of the length of the through hole in the second direction to its width in the first direction is 10 to 100. Exemplarily, the ratio of the length to the width of the through hole is 10, 20, 30, 50, 60, 75, 80, 98, etc.

[0042] If the length-to-width ratio of the through-hole is too large, on the one hand, the strength of the opening area is too low, resulting in poor support for the first display unit; on the other hand, the opening area has too strong a resistance to deformation in the first direction, leading to excessive deformation and an excessively high anti-arching height of the foldable display at the corresponding opening area. If the length-to-width ratio of the through-hole is too small, the opening area has too weak a resistance to deformation in the first direction, making it difficult to deform. This results in insufficient redundancy when bending the first bending area, failing to effectively reduce the risk of screen breakage and optical adhesive peeling in the second bending area. Therefore, in this embodiment, the length-to-width ratio of the through-hole is set to 10 to 100.

[0043] In some embodiments of this application, the first support portion further includes two non-perforated areas; one non-perforated area is located on one side of the perforated area in the second direction, and the other non-perforated area is located on the other side of the perforated area in the second direction. In short, the two non-perforated areas are each distributed on opposite sides of the perforated area in the second direction. In this embodiment, compared to a solution where the first support portion is fixed to the second housing via a perforated area with through holes, the fixation of the first support portion to the second housing via non-perforated areas and adhesives or the like provides a waterproof and dustproof effect.

[0044] In some embodiments of this application, the size of the non-aperture area in the second direction is 2mm to 10mm. Exemplarily, the size of the non-aperture area in the second direction can be 2mm, 4mm, 6mm, 8mm, 10mm, etc.

[0045] It should be noted that if the size of the non-perforated area in the second direction is too small, the waterproof and dustproof performance will be poor; if the size of the non-perforated area in the second direction is too large, it will hinder the deformation of the perforated area. Based on this, in this embodiment, the size of the non-perforated area in the second direction is set to 2mm to 10mm.

[0046] Secondly, embodiments of this application provide a foldable electronic device. The foldable electronic device includes a support assembly and a foldable display screen as described in any of the first aspects. The foldable display screen is connected to the support assembly via a support layer and switches between a folded state and a flattened state based on the support assembly.

[0047] In some embodiments of this application, the display layer further includes a second display portion and a third display portion, with a first bending portion connected between the first display portion and the second display portion, and a second bending portion connected between the first display portion and the third display portion. The support assembly includes a first housing, a second housing, a third housing, a first hinge, and a second hinge; the first housing is located between the second housing and the third housing, rotatably connected to the second housing via the first hinge, and rotatably connected to the third housing via the second hinge. The first display portion is fixed to the first housing via a first support portion, the second display portion is fixed to the second housing via a second support portion corresponding to the support layer, and the third display portion is fixed to the third housing via a third support portion corresponding to the support layer; the first bending portion is movably disposed on the first hinge via a first bending fitting portion corresponding to the support layer, and bends based on the first hinge; the second bending portion is movably disposed on the second hinge via a second bending fitting portion corresponding to the support layer, and bends based on the second hinge.

[0048] This embodiment provides an application scenario for a three-fold foldable electronic device with two bends, a first bend and a second bend.

[0049] In some embodiments of this application, the opening area and the first housing are movably disposed together, meaning the opening area is simply placed on the first housing and is not fixed to each other. In this case, since the opening area of ​​the first support is not fixed to the first housing, the first housing will not interfere with the deformation of the opening area, thereby allowing the opening area to absorb some of the redundant amount through deformation. Attached Figure Description

[0050] Figure 1 is a three-dimensional structural diagram of a foldable electronic device in a flattened state according to an embodiment of this application;

[0051] Figure 2 is an exploded view of the structure of the foldable electronic device shown in Figure 1;

[0052] Figure 3 is a three-dimensional structural diagram of the foldable electronic device shown in Figure 1 in a semi-folded state;

[0053] Figure 4 is a three-dimensional structural diagram of the foldable electronic device shown in Figure 1 in the folded state;

[0054] Figure 5 is a schematic diagram of three folding forms of the foldable electronic device provided in other embodiments of this application in the folded state;

[0055] Figure 6 is a partial cross-sectional view of the foldable display screen shown in Figure 2, obtained by cutting along the cutting line P1-P1.

[0056] Figure 7 is a schematic diagram of the misalignment of the layers of the foldable display screen shown in Figure 6;

[0057] Figure 8 is a cross-sectional view of a three-fold foldable electronic device provided in the related technology in a flattened state;

[0058] Figure 9 is a plan view of the support layer in Figure 8;

[0059] Figure 10 is a schematic diagram of the structure of the foldable electronic device provided in the related technology shown in Figure 8 in a semi-folded state;

[0060] Figure 11 is a schematic diagram of the planar structure of the support layer of the foldable display screen provided in the embodiment of this application in a flattened state;

[0061] Figure 12 is a schematic diagram of the cross-sectional structure of the foldable electronic device shown in Figure 3, obtained by cutting along the cutting line P2-P2.

[0062] Figure 13 is a schematic diagram of the planar structure of the support layer of the foldable display screen provided in some other embodiments of this application in a flattened state;

[0063] Figure 14 is an enlarged view of a portion of the opening area selected by the dashed box shown in Figure 11;

[0064] Figure 15 is a schematic diagram of the shape of the through hole provided in an embodiment of this application;

[0065] Figure 16 is a comparison diagram of the misalignment of each layer of the foldable display screen in the semi-folded state in Figures 6 and 7.

[0066] Figure 17 is a plan view of the opening area provided in some other embodiments of this application;

[0067] Figure 18 is a plan view of the opening area provided in some embodiments of this application.

[0068] The following are the labeling elements in the figure:

[0069] 000 - Foldable electronic devices;

[0070] 100 - Foldable display screen; 101 - First display area; 102 - Second display area; 103 - Third display area; 104 - First bending area; 105 - Second bending area; 110 - Display layer; 111 - First display part; 111a - Opening area; 111b - Non-opening area; 111c - Through hole; 112 - Second display part; 113 - Third display part; 114 - First bending part; 115 - Second bending part; 120 - Support layer; 121 - First support part; 121a - Opening area; 121b - Non-opening area; 121c - Through hole; 122 - Second support part; 123 - Third support part; 124 - First bending mating part; 125 - Second bending mating part;

[0071] 200 - Support assembly; 210 - First housing; 220 - Second housing; 230 - Third housing; 240 - First hinge; 250 - Second hinge. Detailed Implementation

[0072] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0073] In the description of this application, it should be understood that the terms "length", "width", "top", "bottom", "inner", "outer", "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0074] The terms "first," "second," "third," and "fourth," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance or specifying the number of technical features indicated. Furthermore, the terms "first," "second," "third," and "fourth," etc., do not imply that the indicated features must be different.

[0075] In this application, unless otherwise expressly specified and limited, the terms "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part. The relationship between two components defined by the terms "connected," "linked," "fixed," etc., can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0076] In this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0077] In this application, a certain value is x to y, which means that the value can take any value in the interval from x to y.

[0078] It should be noted that in this application, the words "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the words "in some embodiments," "exemplarily," and "for example" is intended to present the relevant concepts in a specific manner.

[0079] First, the technical terms involved in the embodiments of this application will be explained.

[0080] I. OCA (Optically Clear Adhesive, also known as optical adhesive) shear deformation

[0081] The shear deformation of OCA refers to the deformation of a material under shear force, which is usually manifested as interlaminar slip or deformation of the material.

[0082] II. Stacking Misalignment of Foldable Displays Caused by OCA Shear Deformation

[0083] OCA shear deformation causing stack misalignment in foldable displays refers to the relative displacement between the various stacks of the foldable display caused by the shear deformation of the OCA adhesive during the folding process.

[0084] III. Bending Equivalent Modulus

[0085] The bending equivalent modulus, also known as the section modulus or moment of inertia section modulus, is a parameter used in structural engineering to describe a material's ability to resist deformation under bending loads.

[0086] It should be noted that the lower the bending equivalent modulus, the easier it is to deform when subjected to bending force. This means that such structures can absorb more energy during bending and exhibit better flexibility.

[0087] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments.

[0088] This application provides a foldable electronic device. This foldable electronic device supports folding to three times or more.

[0089] It should be noted that the electronic device can be a mobile phone, tablet computer, laptop, notebook PC, personal digital assistant (PDA), handheld computer, in-vehicle device, etc., but is not limited to these. The following explanation uses a tri-fold foldable mobile phone as an example of a foldable electronic device; other products can be adapted accordingly.

[0090] For example, please refer to Figures 1 and 2. Figure 1 is a three-dimensional structural diagram of a foldable electronic device 000 in a flattened state according to an embodiment of this application, and Figure 2 is an exploded structural diagram of the foldable electronic device 000 shown in Figure 1.

[0091] The foldable electronic device 000 is a mobile phone, which is approximately rectangular and flat when unfolded. For ease of description of the embodiments below, an O-XYZ coordinate system is established for the foldable electronic device 000. In the unfolded state shown in Figure 1, the X-axis direction is the length direction of the foldable electronic device 000; the Y-axis direction is the width direction of the foldable electronic device 000; and the Z-axis direction is the thickness direction of the foldable electronic device 000.

[0092] It is understood that the coordinate system of the foldable electronic device 000 can be flexibly set according to actual needs, and no specific limitation is made here. In addition, in some other embodiments, the shape of the foldable electronic device 000 may also be a square plate, etc.

[0093] The foldable electronic device 000 includes a foldable display screen 100 and a support assembly 200.

[0094] First, the foldable display screen 100 will be described by way of example.

[0095] The foldable display screen 100 is used to display images, videos, and other information. The foldable display screen 100 is a display screen with bendable characteristics.

[0096] The foldable display screen 100 includes a first display area 101, a second display area 102, a third display area 103, a first bending area 104, and a second bending area 105. The first display area 101 is located between the second display area 102 and the third display area 103, connected to the second display area 102 via the first bending area 104, and connected to the third display area 103 via the second bending area 105. In practice, the three display areas and two bending areas of the foldable display screen 100 are integrated into one unit.

[0097] Of the three display areas and two bending areas, at least the first bending area 104 and the second bending area 105 are flexible structures. Thus, the first bending area 104 and the second bending area 105 can be bent under external force, giving the foldable display screen 100 a bendable characteristic to support the foldable electronic device 000 to switch between the flattened state shown in Figure 1, the semi-folded state shown in Figure 3, and the folded state shown in Figure 4.

[0098] For example, the foldable display screen 100 is entirely a flexible structure, meaning that the first display area 101, the second display area 102, the third display area 103, the first bending area 104, and the second bending area 105 are all flexible structures. For instance, when the foldable display screen 100 is an active matrix organic light emitting diode (AMOLED) display screen, since AMOLED displays are self-emissive displays and do not require a back light module (BLM), when the substrate in the AMOLED display screen is made of a flexible resin material, such as polyethylene terephthalate (PET), the AMOLED display screen can have bendable characteristics, thus being entirely a flexible structure.

[0099] For example, only the first bending area 104 and the second bending area 105 are flexible structures, while the first display area 101, the second display area 102, and the third display area 103 are rigid structures.

[0100] In the flattened state shown in Figure 1, the foldable display screen 100 is also in the flattened state shown in Figure 1, that is, the second display area 102, the first bending area 104, the first display area 101, the second bending area 105, and the third display area 103 are arranged sequentially along the positive X-axis. The display surfaces of each of the second display area 102, the first bending area 104, the first display area 101, the second bending area 105, and the third display area 103 are in the same plane (parallel to the O-XY plane). Thus, the foldable electronic device 000 is an electronic device that folds laterally. Of course, in some other embodiments, in the flattened state of the foldable display screen 100 shown in Figure 1, the second display area 102, the first bending area 104, the first display area 101, the second bending area 105, and the third display area 103 can also be arranged sequentially along the X-axis, thus the foldable electronic device 000 is an electronic device that folds longitudinally.

[0101] It should be understood that when the foldable display 100 is in the flattened state shown in Figure 1, it can achieve large-screen display to provide users with richer information and a better user experience.

[0102] Next, the support component 200 will be described by way of example.

[0103] A support component 200 is disposed on the non-display side of the foldable display screen 100 and is used to support the foldable display screen 100. It should be noted that the side facing the display surface of the foldable display screen 100 is the display side of the foldable display screen 100. The foldable display screen 100 also includes a non-display surface disposed opposite to the display surface in the Z-axis direction; the non-display side of the foldable display screen 100 is the side facing the non-display surface of the foldable display screen 100.

[0104] Specifically, the support assembly 200 includes a first housing 210, a second housing 220, a third housing 230, a first hinge 240, and a second hinge 250.

[0105] The first housing 210 is located between the second housing 220 and the third housing 230, and is rotatably connected to the second housing 220 via a first hinge 240, and to the third housing 230 via a second hinge 250. A rotatable connection refers to a connection method where the two connected components can rotate relative to each other. Here, the first housing 210 is rotatably connected to the second housing 220 via the first hinge 240, meaning that the first housing 210 and the second housing 220 are connected relative to each other via the first hinge 240.

[0106] In the flattened state shown in Figure 1, the first housing 210, the first hinge 240, the second housing 220, the second hinge 250, and the third housing 230 are arranged sequentially in the X-axis direction and their upper surfaces (the surfaces facing the foldable display screen 100) are roughly flush, so as to flatten the foldable display screen 100.

[0107] In this embodiment, the first housing 210 corresponds to the first display area 101, the second housing 220 corresponds to the second display area 102, and the third housing 230 corresponds to the third display area 103; the first bending area 104 is located on the first hinge 240, and the second bending area 105 is located on the second hinge 250. It should be noted that the description of two corresponding structures in this embodiment refers to the two structures being directly opposite each other in the Z-axis direction, i.e., their orthographic projections in the Z-axis direction coincide. Subsequent embodiments involving similar terms can refer to the definitions here for understanding.

[0108] In this configuration, the first display area 101 is fixed to and supported by the first housing 210, the second display area 102 is fixed to and supported by the second housing 220, and the third display area 103 is fixed to and supported by the third housing 230. The first bending area 104 is movably mounted on and supported by the first hinge 240, and the second bending area 105 is movably mounted on and supported by the first hinge 240. The first bending area 104 and the second bending area 105 can be bent or unfolded based on the first hinge 240 and the second hinge 250, respectively. It should be noted that "movably mounted" refers to a configuration where the first bending area 104 and the first hinge 240 can move relative to each other in the Z-axis direction; that is, the first bending area 104 is simply placed on the first hinge 240 and is not fixed to each other.

[0109] In specific implementation, the first housing 210, the second housing 220, and the third housing 230 are the mid-frame of the foldable electronic device 000, or the mid-frame and the rear housing are mounted together. This application embodiment does not limit this.

[0110] It should be noted that, since the first housing 210 is rotatably connected to the second housing 220 via the first hinge 240 and to the third housing 230 via the second hinge 250, in Figure 1, the second housing 220 can rotate towards or away from the first housing 210 based on the first hinge 240; the third housing 230 can also rotate towards or away from the first housing 210 based on the second hinge 250.

[0111] When the second housing 220 is subjected to a force that drives it to move toward the first housing 210, the first hinge 240 folds to realize the rotation of the second housing 220 toward the first housing 210 (rotation direction W1 in the figure), thereby driving the first bending area 104 to bend to realize the rotation of the second display area 102 toward the first display area 101, so that the foldable electronic device 000 can switch from the flattened state shown in Figure 1 to the semi-folded state shown in Figure 3.

[0112] For example, please refer to Figure 3, which is a three-dimensional structural diagram of the foldable electronic device 000 shown in Figure 1 in a semi-folded state.

[0113] In the semi-folded state shown in Figure 3, the second housing 220 rotates towards the first housing 210 until the second housing 220 and the first housing 210 are stacked in the Z-axis direction. In this case, the first bending area 104 is in a bent state, and the second display area 102 and the first display area 101 are stacked in the Z-axis direction. The first housing 210, the second hinge 250, and the third housing 230 are still arranged sequentially in the X-axis direction, and their upper surfaces (the surfaces facing the foldable display screen 100) are roughly flush, so as to flatten the area of ​​the foldable display screen 100 from the third display area 103 to the first display area 101. That is, the third display area 103, the second bending area 105, and the first display area 101 are arranged sequentially along the X-axis direction, and the display surfaces of the third display area 103, the second bending area 105, and the first display area 101 are in the same plane. In this case, the foldable electronic device 000 is in a semi-folded state.

[0114] Optionally, in Figure 3, the first bending area 104 is bent into a teardrop shape, specifically by inward bending. Specifically, the first bending area 104 includes a first sub-bending area 1041, a second sub-bending area 1042, a third sub-bending area 1043, a first non-bending area 1044, and a second non-bending area 1045.

[0115] The first end of the first sub-bending area 1041 is connected to the first display area 101. The second end of the first sub-bending area 1041 is connected to the first end of the second sub-bending area 1042 via the first non-bending area 1044. The second end of the second sub-bending area 1042 is connected to the first end of the third sub-bending area 1043 via the second non-bending area 1045. The second end of the third sub-bending area 1043 is connected to the second display area 102. The distance between the first end of the first sub-bending area 1041 and the second end of the third sub-bending area 1043 is less than the distance between the first end and the second end of the second sub-bending area 1042, thereby folding the first bending area 104 into a teardrop shape to extend the lifespan of the foldable display screen 100.

[0116] In other embodiments, the first bending area 104 can also be bent into other shapes, such as a "U" shape, a baseball bat shape, etc. The first display area 101 and the second display area 102 are generally parallel and opposite to each other. Here, "generally parallel" means that the angle between the first display area 101 and the second display area 102 is not necessarily 0°, but rather close to 0°, for example, it can be less than a certain angle (such as 15°). "Opposite to each other" means that the display surface of the first display area 101 is opposite to the display surface of the second display area 102. In other embodiments, the display surface of the first display area 101 can also be opposite to the non-display surface of the second display area 102 facing away from the display surface, or vice versa.

[0117] It should be understood that when the foldable electronic device 000 is in the semi-folded state shown in Figure 3, it can provide a display area for the user to meet the user's single-screen needs.

[0118] It should be noted that when the third housing 230 is subjected to a force that drives it to move closer to the first housing 210, the second chain folds to make the third housing 230 rotate in the direction of moving closer to the first housing 210 (rotation direction W2 in the figure), so as to drive the second bending area 105 to bend to make the third display area 103 rotate in the direction of moving closer to the first display area 101, thereby allowing the foldable electronic device 000 to switch from the half-folded state shown in Figure 2 to the folded state shown in Figure 4.

[0119] Please refer to Figure 4, which is a three-dimensional structural diagram of the foldable electronic device 000 shown in Figure 1 in the folded state.

[0120] In the folded state shown in Figure 4, the third housing 230 rotates towards the first housing 210 until the third housing 230 and the first housing 210 are stacked in the Z-axis direction, the second bending area 105 is in a bent state, and the third display area 103 and the first display area 101 are stacked in the Z-axis direction. In this case, the foldable electronic device 000 is in a folded state.

[0121] Optionally, in Figure 4, the second bending area 105 is bent into a "U" shape, specifically by an inward fold. In other embodiments, the first bending area 104 can also be bent into other shapes, such as teardrop, baseball bat, etc. Optionally, the third display area 103 is substantially parallel to the first display area 101, and the display surface of the third display area 103 is opposite to the non-display surface of the first display area 101 that faces away from the display surface. The definition of the third display area 103 being substantially parallel to the first display area 101 can be referred to the aforementioned description of the second display area 102 being substantially parallel to the first display area 101.

[0122] It should be noted that since the foldable electronic device 000 is folded into a state with three sequentially stacked display areas as shown in Figure 4, it is a three-fold electronic device. Based on this, if the foldable electronic device 000 can be folded into a state with four sequentially stacked display areas along the Z-axis, it is a four-fold electronic device; if it can be folded into a state with five sequentially stacked display areas along the Z-axis, it is a five-fold electronic device, and so on.

[0123] It should be understood that when the foldable electronic device 000 is in the folded state shown in Figure 4, the size of the foldable electronic device 000 can be reduced, making it easier for users to hold and carry, and providing users with a better user experience.

[0124] As shown in Figure 4, in its folded state, the foldable electronic device 000 adopts a teardrop-shaped inward fold combined with a "U"-shaped inward fold, making the overall foldable electronic device 000 form a "G" shape. This allows the foldable display screen 100 to be located inside the support component 200. In this way, the foldable display screen 100 is invisible to the user, preventing it from being scratched.

[0125] It should be noted that, using the folding form shown in Figure 4, when the foldable electronic device 000 switches from the flattened state shown in Figure 1 through the semi-folded state shown in Figure 3 to the folded state shown in Figure 4, the first bending area 104 of the foldable display screen bends before the second bending area 105.

[0126] In some other embodiments, when the foldable electronic device adopts other folding forms, when the foldable electronic device 000 switches from the flattened state shown in FIG1 through the semi-folded state shown in FIG3 to the folded state shown in FIG4, the first bending area 104 of the foldable display screen 100 may be bent later than the second bending area 105. Alternatively, the bending order of the first bending area 104 and the second bending area 105 is not sequential, that is, the first bending area 104 may be bent before the second bending area 105 or later than the second bending area 105. This application embodiment does not limit this.

[0127] Furthermore, in some other embodiments, the foldable electronic device 000 may also employ other folding forms to present other shapes in the folded state.

[0128] The following description, in conjunction with Figure 5, provides examples of other folding configurations.

[0129] For example, please refer to Figure 5, which is a structural schematic diagram of three folding forms of the foldable electronic device 000 provided in other embodiments of this application in the folded state.

[0130] In Figure 5(a), the foldable electronic device 000 adopts a folding form where the first bending area 104 is folded outward into a "U" shape, and the second bending area 105 is folded outward into a "U" shape. When the foldable electronic device 000 with this folding form switches from a flattened state to a half-folded state and then to a folded state, the first bending area 104 is folded first, followed by the second bending area 105, so that the foldable electronic device 000 forms a "G" shape in the folded state. This allows the first display area 101 and the third display area 103 of the foldable display screen 100 to be located outside the support component 200 in the folded state. Thus, even in the folded state, the foldable electronic device 000 can still provide a display area to the user to meet the user's screen usage needs. Furthermore, the foldable electronic device 000 can also provide two display areas to the user in the half-folded state to meet the user's dual-screen needs.

[0131] In Figure 5(b), the foldable electronic device 000 adopts a folding form where the first bending area 104 is folded inward into a ball-and-stick shape, and the second bending area 105 is folded inward into a "U" shape. When the foldable electronic device 000 using this folding form switches from a flattened state to a half-folded state and then to a folded state, the first bending area 104 is folded first, followed by the second bending area 105, so that the foldable electronic device 000 forms an overall "G" shape in the folded state, thereby placing the foldable display screen 100 inside the support component 200 in the folded state. In this way, the foldable display screen 100 is not visible to the user, which can prevent the foldable display screen 100 from being scratched.

[0132] In Figure 5(c), the foldable electronic device 000 adopts a folding form where the first bending area 104 is folded inward into a teardrop shape and the second bending area 105 is folded outward into a "U" shape. When the foldable electronic device 000 using this folding form switches from a flattened state to a folded state through a half-folded state, the first bending area 104 can be bent first, followed by the second bending area 105; or the second bending area 105 can be bent first, followed by the first bending area 104. This results in the foldable electronic device 000 forming a "Z" shape in the folded state, so that the third display area 103 of the foldable display screen 100 is located outside the support component 200 in the folded state. Thus, even in the folded state, the foldable electronic device 000 can provide the user with a third display area 103 to meet the user's single-screen needs.

[0133] It is understood that in the various examples in Figure 5, the first bending area 104 and the second bending area 105 can be folded into other shapes, and the embodiments of this application do not limit this.

[0134] For example, please refer to Figure 6, which is a partial cross-sectional view of the foldable display screen 100 shown in Figure 2 obtained by cutting along the cutting line P1-P1.

[0135] The foldable display 100 includes a display layer 110 and a support layer 120 stacked sequentially in the Z-axis direction.

[0136] The display layer 110 is used to implement the display function of the foldable display screen 100.

[0137] Optionally, the display layer 110 may include a back film layer, a first optical adhesive layer, a display panel (also known as a panel), a second optical adhesive layer, an ultra-thin flexible glass (UTG), a third optical adhesive layer, and a cover plate layer, which are stacked sequentially along the positive Z-axis.

[0138] The back film layer supports the display panel; the display panel outputs display content; the UTG and cover plate layers protect the foldable display screen 100 from damage; the first optical adhesive layer, the second optical adhesive layer, and the third optical adhesive layer are used to bond the structural layers on both sides. In other embodiments, the display layer 110 may include more or fewer structural layers, such as an antireflection (AR) film for suppressing reflected light, a hydrophobic and oleophobic layer, etc., which are not specifically limited in this application. In this application, the location of the first display area 101 on the display layer 110 is referred to as the first display portion 111, the location of the second display area 102 on the display layer 110 is referred to as the second display portion 112, the location of the third display area 103 on the display layer 110 is referred to as the third display portion 113, the location of the first bending area 104 on the display layer 110 is referred to as the first bending portion 114, and the location of the second bending area 105 on the display layer 110 is referred to as the second bending portion 115. The first display unit 111 is connected between the first bent portion 114 and the second bent portion 115; the first bent portion 114 is connected between the first display unit 111 and the second display unit 112; and the second bent portion 115 is connected between the first display unit 111 and the third display unit 113.

[0139] The display surface of the display layer 110 can be the display surface of the folded display screen 100. In Figure 6, the display surface of the display layer 110 is the side of the cover layer of the display layer 110 that faces away from the UTG. In this case, the display surface of the second display part 112 is the display surface of the second display area 102, the display surface of the first bending part 114 is the display surface of the first bending area 104, the display surface of the first display part 111 is the display surface of the first display area 101, the display surface of the second bending part 115 is the display surface of the second bending area 105, and the display surface of the third display part 113 is the display surface of the third display area 103.

[0140] Based on this, when the foldable display screen 100 is in the flattened state shown in Figure 1, each part of the display layer 110 is flattened, that is, the display surfaces of the second display part 112, the first bending part 114, the first display part 111, the second bending part 115, and the third display part 113 of the display layer 110 are arranged sequentially in the same plane (parallel to the O-XY plane) along the X-axis direction (i.e., the first direction). In addition, in this embodiment, the direction perpendicular to the first direction in this plane is also referred to as the second direction, which, as can be seen from the figure, is the Y-axis direction.

[0141] When the foldable display screen 100 is in the semi-folded state shown in Figure 3, the first bending portion 114 of the display layer 110 is in a bent state, while other parts are in a non-bent state or flattened (i.e., the display surfaces of other parts are in the same plane); when the foldable display screen 100 is in the folded state shown in Figure 4, the first bending portion 114 and the second bending portion 115 of the display layer 110 are both in a bent state, while other parts are in a non-bent state.

[0142] The support layer 120, also commonly referred to as a bamboo book, is disposed on the non-display side of the display layer 110 to support the display layer 110. For example, the support layer 120 is bonded to the non-display side of the display layer 110 in the Z-axis direction away from the display surface by a fourth optical adhesive layer, thereby being disposed on the non-display side of the display layer 110.

[0143] It should be noted that the non-display side of the display layer 110 facing away from the display surface is the non-display side of the display layer 110. In Figure 6, the non-display side of the display layer 110 facing away from the display surface in the Z-axis direction is the side of the back film layer of the display layer 110 facing away from the display panel.

[0144] The support layer 120 can be made of materials with toughness and strength, such as stainless steel (SUS), titanium alloy, or carbon fiber, so that it can bend along with the display layer 110 while supporting the display layer 110, thereby realizing the folding function of the foldable display screen 100.

[0145] In this embodiment, the portion of the first display area 101 on the support layer 120 is referred to as the first support portion 121, the portion of the second display area 102 on the support layer 120 is referred to as the second support portion 122, the portion of the third display area 103 on the support layer 120 is referred to as the third support portion 123, the portion of the first bending area 104 on the support layer 120 is referred to as the first bending mating portion 124, and the portion of the second bending area 105 on the support layer 120 is referred to as the second bending mating portion 125.

[0146] It is understood that the first support portion 121 faces the first display portion 111 and the first housing 210, the second support portion 122 faces the second display portion 112 and the second housing 220, and the third support portion 123 faces the third display portion 113 and the third housing 230. In this case, the first display area 101 is specifically fixed to the first housing 210 by the first support portion 121, the second display area 102 is specifically fixed to the second housing 220 by the second support portion 122, and the third display area 103 is specifically fixed to the third housing 230 by the third support portion 123. For example, it can be fixed by means of adhesive bonding.

[0147] It can also be understood that the first bending fitting part 124 is directly opposite the first bending part 114, and the second bending fitting part 125 is directly opposite the second bending part 115. In order to facilitate bending, both the first bending fitting part 124 and the second bending fitting part 125 are provided with through holes that penetrate the upper and lower surfaces of the first bending fitting part 124 and the second bending fitting part 125, which are arranged opposite to each other in the Z-axis direction.

[0148] The side of the support layer 120 facing away from the display layer 110 is the non-display side of the foldable display screen 100 that faces away from the display surface. When the foldable display screen 100 is in the flattened state shown in Figure 1, the various parts of the support layer 120 are flattened, that is, the second support part 122, the first bending fitting part 124, the first support part 121, the second bending fitting part 125, and the third support part 123 of the support layer 120 are arranged sequentially along the X-axis direction.

[0149] When the foldable display screen 100 is in the semi-folded state shown in Figure 3, the first bending mating part 124 of the support layer 120 is in a bent state, while other parts are in a non-bent state; when the foldable display screen 100 is in the folded state shown in Figure 4, the first bending mating part 124 and the second bending mating part 125 of the support layer 120 are both in a bent state, while other parts are in a non-bent state.

[0150] It should be noted that each structural layer included in the support layer 120 and the display layer 110 can be considered as a stack of the foldable display screen 100. During the folding process of the foldable display screen 100, the optical adhesive layers between the stacks of the foldable display screen 100 undergo shear deformation, resulting in misalignment. Misalignment can refer to the distance that each stack of the foldable display screen 100 moves relative to the stack in its current state (here, the semi-folded state) along the X-axis, compared to its flattened state. For ease of understanding, Figure 7 illustrates the situation where the optical adhesive layers between the stacks of the foldable display screen 100 undergo shear deformation, resulting in misalignment of the stacks. It should be noted that the misalignment results in a certain amount of redundancy in each stack.

[0151] In related technologies, please refer to Figure 8, which is a cross-sectional view of the three-fold foldable electronic device 000 provided in the related technology in its flattened state. The cutting position corresponding to the cross-section shown in Figure 8 can be adapted to the cutting position corresponding to the cross-section shown in Figure 6. The first support portion 121 of the support layer 120 in the foldable display screen 100 has a complete, unperforated structure.

[0152] Please refer to Figure 9, which is a planar schematic diagram of the support layer 120 in Figure 8. The first support portion 121, located between the first bending mating portion 124 and the second bending mating portion 125, does not have through holes. This causes a large bulge in the bending area of ​​the foldable display screen 100 due to the redundancy, leading to screen cracking and optical adhesive peeling. The following analysis and explanation are based on Figures 3 and 10.

[0153] First, please refer to Figure 3. The double-foldable electronic device 000 does not include the third display area 103, the second bending area 105, the third housing 230, and the second hinge 250 shown in Figure 2. Since the first display area 101 and the second display area 102 on both sides of the first bending area 104 are fixed (specifically, the first housing 210 and the second housing 220 are fixed), the redundancy will move to the edge of the foldable display screen 100 in the X-axis direction and shift (which can be simply understood as the phenomenon that after bending a stack of papers, the papers gradually shift at the edge from the inside to the outside), thereby absorbing the redundancy and preventing it from causing a large anti-arching of the foldable display screen 100.

[0154] Please refer to Figure 10, which is a structural schematic diagram of the foldable electronic device 000 provided in the related art shown in Figure 8 in a semi-folded state. The first hinge and the second hinge below the first bending area 104 and the second bending area 105 are not shown in the figure.

[0155] In the three-fold foldable electronic device 000, the first bending area 104 and the second bending area 105 bend sequentially. Due to the presence of an unfixed second bending area 105, the redundancy caused by the misalignment of the layers after the first bending area 104 bends accumulates in the second bending area 105, making this area prone to large bulges, which can lead to screen cracking and optical adhesive peeling. Because this bulge protrudes away from the second hinge 250, this embodiment of the application also refers to this bulge as a reverse bulge. To illustrate the reverse bulge, the area selected by the dashed rectangular frame in the figure is enlarged.

[0156] Based on this, in order to solve the above problems, unlike related technologies, in the foldable display screen 100 shown in FIG6 of the embodiment of this application, an opening area 121a is provided on the first support portion 121 of the support layer 120, and a through hole 121c is provided in the opening area 121a. This can reduce the anti-arch height of the second bending area 105 after the first bending area 104 is bent, thereby reducing the problems of screen cracking and optical adhesive peeling. The following description is in conjunction with FIG11 to FIG18.

[0157] For example, please refer to FIG11. FIG11 is a schematic diagram of the planar structure of the support layer 120 of the foldable display screen 100 provided in the embodiment of this application in the flattened state, that is, a schematic diagram of the planar structure of the support layer 120 of the foldable display screen 100 shown in FIG6.

[0158] To facilitate bending, through holes may be provided in the first bending area 104 and the second bending area 105. Optionally, when the first bending area 104 is bent into a teardrop shape, the first bending mating portion 124 of the support layer 120 corresponding to the first bending area 104 is also bent into a teardrop shape. Based on this, the first bending mating portion 124 has a first sub-bending portion 1241 corresponding to the first sub-bending area 1041, a first non-bending portion 1244 corresponding to the first non-bending area 1044, a second sub-bending portion 1242 corresponding to the second sub-bending area 1042, a second non-bending portion 1245 corresponding to the second non-bending area 1045, and a third sub-bending portion 1243 corresponding to the third sub-bending area 1043.

[0159] Through holes are provided on the first sub-bending portion 1241, the second sub-bending portion 1242, and the third sub-bending portion 1243 to reduce the risk of breakage when the first sub-bending portion 1241, the second sub-bending portion 1242, and the third sub-bending portion 1243 are bent in conjunction with the upper first sub-bending area 1041, the second sub-bending area 1042, and the third sub-bending area 1043. No through holes are provided on the first non-bending portion 1244 and the second non-bending portion 1245.

[0160] Furthermore, the portion located between the first bending fitting portion 124 and the second bending fitting portion 125 is the first support portion 121. The first support portion 121 is provided with an opening area 121a, and the opening area 121a has a through hole that penetrates the upper and lower surfaces of the opening area 121a that are facing away from each other in the Z-axis direction.

[0161] It should be noted that the first side of the opening area 121a in the X-axis direction is defined by the position of the through hole on the first support portion 121 closest to the first bent fitting portion 124 in the X-axis direction (that is, the position closest to the left edge of the first support portion 121), extending along the Y-axis direction to the first side and the second side of the opening area 121a in the Y-axis direction; the second side of the opening area 121a in the X-axis direction is defined by the position of the through hole on the first support portion 121 closest to the second bent fitting portion 125 in the X-axis direction (that is, the position closest to the right edge of the first support portion 121), extending along the Y-axis direction to the first side and the second side of the opening area 121a in the Y-axis direction.

[0162] The first side of the opening region 121a in the Y-axis direction is defined by the position of the through hole on the first support portion 121 closest to the upper edge of the first support portion 121 in the Y-axis direction, extending along the X-axis to the first and second sides of the opening region 121a in the X-axis direction; the second side of the opening region 121a in the Y-axis direction is defined by the position of the through hole on the first support portion 121 closest to the lower edge of the first support portion 121 in the Y-axis direction, extending along the X-axis to the first and second sides of the opening region 121a in the X-axis direction. In this foldable display screen 100, by providing an opening region 121a with a through hole on the first support portion 121, the bending equivalent modulus of the opening region 121a can be reduced.

[0163] Please refer to Figure 12, which is a cross-sectional view of the foldable electronic device 000 shown in Figure 3 obtained by cutting along the section line P2-P2. That is, a cross-sectional view of the foldable electronic device 000 in a semi-folded state. The first hinge 240 and the second hinge 250 in Figure 3 are not shown in the figure.

[0164] When the foldable display screen 100 is in a semi-folded state, when the redundant amount caused by the bending of the first bending area 104 is transferred to the opening area 121a, the opening area 121a deforms due to the reduction of the bending equivalent modulus of the opening area 121a, and causes the stacked layers of the upper display layer to deform as well. This absorbs part of the redundant amount that would have moved to the second bending area 105 and caused the second bending area 105 to arch, thereby reducing the arch height of the second bending area 105. The original arch height of the second bending area 105 is shown by the dashed line in the figure.

[0165] Understandably, as the height of the second folding zone 105 decreases, the risk of screen breakage and optical adhesive peeling also decreases, and the reliability of the foldable display 100 is improved.

[0166] Furthermore, the presence of the opening region 121a helps to push the redundant amount towards the side where the first bending region 104 is located. Specifically, normally, if the bending equivalent modulus of the first support portion 121 and the second support portion 122 are the same, then the teardrop shape formed by the bending of the first bending region 104 is symmetrical. However, since the second support portion 122 in Figure 12 has an opening region 121a with a through hole 121c, the bending equivalent modulus of the second support portion 122 is lower than that of the first support portion 121, causing the misalignment to be biased towards the side where the second support portion 122 is located. In this case, the third sub-bending region 1043 of the first bending region 104, being unfixed, will also deform, thereby absorbing a portion of the redundant amount.

[0167] For example, the flexural equivalent modulus of the opening region 121a is reduced to a value of less than 50 MPa. For instance, the flexural equivalent modulus of the opening region 121a is 25 MPa, 30 MPa, 35 MPa, 45 MPa, etc.

[0168] In this embodiment, the bending equivalent modulus of the opening area 121a is less than 50MPa, which allows the redundant amount absorbed by the opening area 121a to reduce the anti-arching height of the second bending area 105 to a relatively safe value, that is, a value that is not enough to cause screen cracking and optical adhesive peeling, for example, the anti-arching height is reduced to 0.02mm.

[0169] In some embodiments of this application, referring to FIG11, both the opening area 121a and the first support portion 121 have widths in the X-axis direction, namely width W1 and width W2, respectively. The width W1 of the opening area 121a is 10% to 50% of the width W2 of the first support portion 121. For example, the width W1 is 10%, 15%, 20%, 31%, 45%, or 49% of the width W2. It should be noted that the width of the opening area 121a in the X-axis direction is the distance between the first side and the second side of the opening area 121a in the X-axis direction.

[0170] For example, referring to Figure 11, the width W1 of the opening area 121a is 10 to 20 mm. For instance, the width W1 of the opening area 121a is 10 mm, 12 mm, 14 mm, 18 mm, or 20 mm.

[0171] Referring to Figure 12, if the width W1 of the opening area 121a is too low, the reduction effect on the bending equivalent modulus of the opening area 121a is not significant, and the anti-arching height of the second bending area 105 cannot be reduced to a safe value. Conversely, if the width of the opening area 121a is too high, the strength of the opening area 121a will be greatly reduced, resulting in a weak support effect of the first support part 121 on the first display part 111. Based on this, in this embodiment, the width of the opening area 121a is set to 10% to 50% of the width of the first support part 121. This can effectively absorb the redundancy to reduce the anti-arching height of the second bending area 105 to a safe value, while also ensuring the strength of the opening area 121a.

[0172] In some embodiments of this application, please continue to refer to FIG11. In the X-axis direction, the opening area 121a is centrally disposed on the first support portion 121. The term "centrally disposed" means that the center line O1 of the opening area 121a in the Y-axis direction and the center line O2 of the first support portion 121 in the Y-axis direction are on the same straight line.

[0173] It should be noted that, referring to Figure 12, in the X-axis direction, the closer each layer of the foldable display screen 100 is to the second bending area 105 (i.e., the further away from the first bending area 104), the greater the misalignment; the further away from the second bending area 105 (i.e., the closer to the first bending area 104), the smaller the misalignment.

[0174] The closer the center line O1 of the opening area 121a is to the second bending area 105 in the X-axis direction, the more redundant data is absorbed, and the higher the anti-arching height of the foldable display 100 at the corresponding opening area 121a position, the higher the risk of screen breakage and optical adhesive peeling at this position. Conversely, the further the center line O1 of the opening area 121a is from the second bending area 105 in the X-axis direction, the less redundant data is absorbed, and the less the reduction in anti-arching height of the foldable display 100 at the second bending area 105 position, the higher the risk of screen breakage and optical adhesive peeling at this position.

[0175] Based on this, in this embodiment, the opening area 121a is centrally located on the first support 121 in the X-axis direction, absorbing a moderate amount of redundancy. When the anti-arch height of the second bending area 105 is reduced, the anti-arch height of the foldable display screen 100 at the position corresponding to the opening area 121a will not be too high. This makes it less likely for the foldable display screen 100 to crack or peel off the optical adhesive at the positions of the second bending area 105 and the opening area 121a.

[0176] Furthermore, when the opening region 121a is centrally located on the first support portion 121 in the X-axis direction, the first support portion 121 is distributed on the non-opening regions 121d on opposite sides of the opening region 121a along the X-axis direction, and they have the same size in the X-axis direction. Since the non-opening regions 121d are used to fix the aforementioned first housing 210, the opening region 121a will experience stress due to tension from the non-opening regions 121d during deformation. When the non-opening regions 121d on opposite sides of the opening region 121a along the X-axis direction have the same size, the stress on the opening region 121a from the non-opening regions 121d on opposite sides of the opening region 121a along the X-axis direction is more evenly distributed during deformation.

[0177] Of course, in some other embodiments, the opening area 121a may not be centrally located on the first support portion 121 in the X-axis direction, and this application embodiment does not specifically limit this.

[0178] In order not to hinder the deformation of the opening area 121a, in some embodiments of this application, the first support portion 121 and the aforementioned first housing 210 are movably arranged in FIG11. The so-called movable arrangement means that the first support portion 121 and the opening area 121a can move relative to each other in the Z-axis direction, that is, the opening area 121a is simply placed on the first housing 210 and is not fixed to each other.

[0179] In this embodiment, since the opening area 121a of the first support 121 is not fixed to the first housing 210, the first housing 210 will not interfere with the deformation of the opening area 121a in the Z-axis direction. Thus, the opening area 121a can absorb a portion of the redundant amount by deforming in the Z-axis direction, thereby achieving the above-mentioned technical effect.

[0180] In this case, the first support portion 121 specifically fixes the aforementioned housing 210 through the non-opening areas distributed around the opening area 121a. Specifically, referring to FIG11, the first support portion 121 has two non-opening areas 121b located on opposite sides of the opening area 121a in the Y-axis direction, and two non-opening areas 121d located on opposite sides of the opening area 121a in the X-axis direction.

[0181] The two non-perforated areas 121b located on opposite sides of the perforated area 121a in the Y-axis direction refer to the fact that one non-perforated area 121b is distributed on one side of the perforated area 121a in the Y-axis direction, and the other non-perforated area 121b is distributed on the other side of the perforated area 121a in the Y-axis direction. A non-perforated area refers to a region that does not have a through hole.

[0182] The two non-opening regions 121d located on opposite sides of the open area 121a in the X-axis direction refer to one non-opening region 121d being distributed on one side of the open area 121a in the X-axis direction, and the other non-opening region 121d being distributed on the other side of the open area 121a in the X-axis direction.

[0183] In this case, the non-perforated areas distributed around the perforated area 121a of the first support portion 121 include two non-perforated areas 121b and two non-perforated areas 121d. Based on this, the first support portion 121 is fixed to the aforementioned first housing 210 through the two non-perforated areas 121b and the two non-perforated areas 121d.

[0184] In this embodiment, compared to the solution of fixing the first support 121 to the second housing 220 through the open area 121a with through holes, the first support 121 is fixed to the second housing 220 through the non-open area 121b and the second housing 220 by adhesive or the like, which can achieve the effect of waterproofing and dustproofing.

[0185] In some embodiments of this application, the dimension of the non-perforated area 121b in the Y-axis direction is 2mm to 10mm, for example, it can be 2mm, 4mm, 6mm, 8mm, 10mm, etc. It should be noted that if the dimension of the non-perforated area 121b in the Y-axis direction is too small, the waterproof and dustproof performance will be poor; if the dimension of the non-perforated area 121b in the Y-axis direction is too large, it will be detrimental to the deformation of the perforated area 121a. Therefore, in this embodiment, the dimension of the non-perforated area 121b in the Y-axis direction is set to 2mm to 10mm.

[0186] It should be noted that the dimensions of the two non-hole regions 121b in the Y-axis direction can be the same or different. This application does not limit this.

[0187] In addition, in some other embodiments, as shown in FIG13, FIG13 is a schematic diagram of the planar structure of the support layer 120 of the foldable display screen 100 provided in other embodiments of this application in a flattened state. Unlike FIG11, the first support portion 121 may not have a non-perforated area 121b. Thus, the perforated area 121a extends directly to the edge of the first support portion 121 in the Y-axis direction.

[0188] In some embodiments of this application, please refer to FIG14, which is an enlarged view of a portion of the opening area 121a selected by the dashed box shown in FIG11.

[0189] The through hole 121c on the opening area 121a is an elongated hole. For example, as shown in Figure 15, the shape of the through hole 121c can be a racetrack shape as shown in Figure 15(a), a dumbbell shape as shown in Figure 15(b), or a baseball bat shape as shown in Figure 15(c), etc. It can be understood that the length direction of the through hole 121c in the three shapes in Figure 15 extends along the Y-axis direction. Furthermore, the length direction of the through hole 121c is in the Y-axis direction. In this case, the length of the through hole 121c is its dimension in the Y-axis direction (i.e., the second direction), and the width of the through hole 121c is its dimension in the X-axis direction (i.e., the first direction).

[0190] It should be noted that when the edge of the through hole 121c is uneven in the X-axis direction, the width of the through hole 121c is the maximum dimension of the through hole 121c in the X-axis direction; when the edge of the through hole 121c is uneven in the Y-axis direction, the length of the through hole 121c is the maximum dimension of the through hole 121c in the Y-axis direction.

[0191] In this embodiment, the length direction of the through hole 121c is in the Y-axis direction, which makes the stiffness (i.e., resistance to deformation, i.e., bending equivalent modulus) of the opening area 121a in the X-axis direction smaller.

[0192] Referring to Figure 12, the X-axis direction is the bending direction of the foldable display. When the opening area 121a has lower stiffness in the X-axis direction, it is easier for the opening area 121a to deform in the X-axis direction when the foldable display is bent. This makes it easier to absorb the redundancy generated when the first bending area 104 is bent, thereby reducing the risk of screen breakage and optical adhesive peeling at the second bending area 105.

[0193] It should be noted that the three elongated through-hole shapes 121c shown in Figure 15 are merely illustrative. In actual implementation, the through-hole 121c can also be other shapes, and this application embodiment does not impose any special limitations on this.

[0194] In some embodiments of this application, the length-to-width ratio of the through hole 121c is 10 to 100. For example, the length-to-width ratio of the through hole 121c is 10, 20, 30, 50, 60, 75, 80, 98, etc.

[0195] It should be noted that the length-to-width ratio of the through hole 121c is too large. On the one hand, this results in the opening area 121a having too low strength and providing poor support for the first display unit. On the other hand, referring to Figure 12, the opening area 121a has too strong resistance to deformation in the X-axis direction, causing excessive deformation. This results in an excessively high anti-arching height of the foldable display 100 at the position corresponding to the opening area 121a. Conversely, if the length-to-width ratio of the through hole 121c is too small, the opening area 121a has too weak resistance to deformation in the X-axis direction and is not easily deformed. This results in insufficient redundancy when bending the first bending area 104, causing the anti-arching height of the second bending area 105 to remain high. This fails to effectively reduce the risk of screen breakage and optical adhesive peeling of the foldable display 100 in the second bending area 105.

[0196] Based on this, in this embodiment, the length-to-width ratio of the through hole 121c is set to 10 to 100. This setting can avoid excessively high anti-arching height of the foldable display screen 100 at the corresponding opening area 121a, and can also reduce the anti-arching height of the second bending area 105 to a safer value, thereby reducing the risk of screen breakage and optical adhesive peeling of the foldable display screen 100 at the corresponding opening area 121a and the second bending area 105.

[0197] In some embodiments of this application, referring to FIG14, the opening area 121a is provided with multiple rows of through holes 121c spaced apart in the X-axis direction. Each row of through holes 121c includes one or more through holes 121c spaced apart in the Y-axis direction (i.e., the second direction). In this embodiment, when the opening area 121a is provided with multiple rows of through holes 121c spaced apart in the X-axis direction, the absorbed redundancy can be distributed to multiple positions of the opening area 121a in the X-axis direction. When the opening area 121a deforms, the stress distribution in the X-axis direction is more dispersed and uniform, which can reduce the phenomenon of breakage of the foldable display screen caused by excessive local deformation due to stress concentration.

[0198] When each column of through-holes 121c includes multiple through-holes 121c spaced apart in the Y-axis direction, the absorbed redundancy can be distributed to multiple locations in the opening area 121a in the Y-axis direction. When the opening area 121a deforms, the stress distribution in the Y-axis direction is more dispersed and uniform, which can reduce the phenomenon of breakage of the foldable display screen caused by excessive local deformation due to stress concentration. Based on this, this embodiment can reduce the risk of screen cracking and optical adhesive peeling of the foldable display screen 100 at the corresponding opening area 121a.

[0199] In some embodiments of this application, please continue to refer to FIG14. The through holes 121c between two adjacent columns of through holes 121c are staggered, that is, they are not directly aligned in the X-axis direction.

[0200] In this embodiment, the through holes 121c in adjacent rows are staggered, which makes the connection area of ​​the opening area 121a between the through holes 121c more dispersed. Thus, when the opening area 121a deforms, the stress distribution is more dispersed and uniform, reducing the possibility of breakage of the foldable display screen due to excessive local deformation caused by stress concentration. Based on this, this embodiment can reduce the risk of screen cracking and optical adhesive peeling at the corresponding opening area 121a location in the foldable display screen.

[0201] The following analysis, with reference to Figure 16, examines the misalignment of the foldable display screen 100 shown in Figures 6 and 7.

[0202] Please refer to Figure 16, which is a comparison diagram of the displacement of each layer of the foldable display screen 100 in the semi-folded state in Figures 6 and 7.

[0203] Figure 16(a) is a schematic diagram of the misalignment of the foldable display screen 100 in Figure 7 in a semi-folded state. Figure 16(b) is a schematic diagram of the misalignment of the foldable display screen 100 in Figure 6 in a semi-folded state. By comparison, the misalignment of each layer corresponding to the middle position of the second housing 220 can be obtained as shown in Table 1 below.

[0204] Table 1 Displacement / μm

[0205] As can be seen from Table 1, due to the absorption of redundancy by the opening area 121a provided on the first support part 121 in Figure 6, the redundancy transmitted to the second bending area 105 is reduced, thereby making the misalignment at the position corresponding to the center line of the second bending area of ​​the foldable display screen 100 along the Y-axis direction (i.e., the position of the dotted line in the figure) significantly lower, and the misalignment of each layer is reduced by a total of 20um at this position.

[0206] In this case, the height of the arch in the second bending zone 105 decreased from 0.39 mm in Figure 16(a) to 0.02 mm in Figure 16(b), failing to meet the generally accepted standard for arching.

[0207] In the above embodiments, the width and length of the through holes in each column are consistent. This application also provides embodiments in which the width and length of the through holes in each column gradually change in the X-axis direction. These are illustrated below with reference to Figures 17 and 18.

[0208] In some embodiments of this application, please refer to FIG17, which is a planar schematic diagram of the opening area 121a provided in other embodiments of this application.

[0209] As can be seen from Figure 17, in the negative X-axis direction, the width and length of the through holes 121c between different columns of through holes decrease sequentially.

[0210] Referring to Figure 12, when the foldable display screen 100 is in a semi-folded state, the first bending area 104 is in a bent state while the second bending area 105 is in a non-bent state. That is, when the foldable electronic device 000 switches from a flattened state to a folded state, the first bending area 104 bends before the second bending area 105. Referring to Figure 6, when the first bending area 104 bends before the second bending area 105, the first bending portion 114 bends before the second bending portion 115.

[0211] Based on this, the negative direction of the X-axis is the direction from the first bending portion 114 that bends first and the second bending portion 115 that bends later. Based on this, in the embodiment shown in FIG17, the width and length of the through hole 121c between different columns of through holes decrease sequentially along the direction from the first bending portion 114 that bends first and the second bending portion 115 that bends later.

[0212] It should be noted that, in the negative X-axis direction, the width and length of the through holes 121c between different columns decrease sequentially, and the bending equivalent modulus of the opening area 121a also gradually decreases in this negative X-axis direction.

[0213] Referring to Figure 12, the bending equivalent modulus of the opening region 121a gradually decreases in the negative X-axis direction. This causes the opening region 121a to gradually transition from smaller deformations to larger deformations along the negative X-axis direction, thereby pushing the redundancy towards the side where the first bending region 104 is located, thus reducing the redundancy transmitted to the second bending region 105. Based on this, this embodiment can reduce the risk of screen breakage and optical adhesive peeling in the second bending region of the foldable display.

[0214] In Figure 17, in the negative X-axis direction, the length and width of the through holes 121c between different columns of through holes decrease sequentially. It should be noted that in some other embodiments, the technical solutions of sequentially decreasing length and width of the through holes 121c between different columns of through holes in the negative X-axis direction can be implemented independently, and the embodiments of this application do not limit this.

[0215] Furthermore, it should be noted that the embodiment shown in FIG17 is only effective in foldable displays 100 where the first bending portion 114 and the second bending portion 115 have a unique bending sequence. Referring to FIG5, in FIG5(a) and FIG5(b), the first bending portion 114 and the second bending portion 115 have a unique bending sequence; in FIG5(c), the first bending portion 114 and the second bending portion 115 have a variable bending sequence, that is, the first bending portion 114 can be folded before the second bending portion 115, and the second bending portion 115 can be folded before the first bending portion 114. Based on this, the embodiment shown in FIG17 can be applied to FIG5(a) and FIG5(b), but is not suitable for FIG5(c). For foldable displays 100 without a unique bending sequence, the embodiments of this application provide an opening area 121a as shown in FIG18.

[0216] For example, please refer to Figure 18, which is a plan view of the opening area 121a provided in some embodiments of this application.

[0217] Referring to Figure 5(c), for the case where, when the foldable display screen switches from a flattened state to a folded state, either the first bending area 104 or the second bending area 105 is in a bending state before the other bending area, that is, the folding order of the foldable display screen is not important, the opening area 121a shown in Figure 18 includes N columns of through holes arranged sequentially at intervals along the negative X-axis direction, namely the first column of through holes to the Nth column of through holes, where N is an integer greater than 2. Figure 18 shows a total of 9 columns of through holes, that is, the case where N is 9. Here, the negative X-axis direction is the direction from the first bending area 104 to the second bending area 105, that is, the direction from the aforementioned first bending portion 114 to the second bending portion 115.

[0218] In the embodiment shown in Figure 18, the first dimension of the through holes 121c between different columns of through holes decreases sequentially along the negative X-axis. The second dimension of the through holes between different columns of through holes increases sequentially along the negative X-axis; where j is an integer less than N and greater than 1; the first and second dimensions are length and / or width. In the embodiment shown in Figure 18, the j-th column of through holes is the fifth column of through holes from right to left.

[0219] In this embodiment, referring to Figure 5(c), when the first bending area 104 bends first (i.e., the first bending portion bends first), the opening area 121a in Figure 18 pushes the redundant amount towards the side where the first bending area 104 is located through the first column of through holes to the j-th column of through holes, thereby reducing the redundant amount transmitted to the second bending area 105, and thus reducing the risk of screen breakage and optical adhesive peeling of the foldable display screen 100 in the second bending area 105; when the second bending area 105 bends first (i.e., the second bending portion bends first), the opening area 121a in Figure 18 pushes the redundant amount towards the side where the second bending area 105 is located through the j-th column of through holes to the N-th column of through holes, thereby reducing the redundant amount transmitted to the second bending area 105, and thus reducing the risk of screen breakage and optical adhesive peeling of the foldable display screen in the first bending area 104.

[0220] It should be noted that although Figure 18 illustrates the example of the first dimension being the length and width and the second dimension being the length and width, in some other embodiments, the first dimension can also be either the length or the width, and the second dimension can also be either the length or the width. Furthermore, when the first dimension is the length, the second dimension can also be the width, and when the first dimension is the width, the second dimension can also be the length.

[0221] For example, the first dimension is length, and the second dimension is length and width; or the first dimension is length and width, and the second dimension is length; or the first dimension is width, and the second dimension is length and width; or the first dimension is length and width, and the second dimension is width; or the first dimension is length, and the second dimension is width; or the first dimension is width, and the second dimension is length.

[0222] Optionally, the through holes from the first column to the j-th column are symmetrical to the through holes from the j-th column to the N-th column. In this case, N is required to be a base number, and j is the median of 1 to N. For example, in Figure 18, N is 9 and j is 5, then the through holes from the first column to the fifth column are symmetrical to the through holes from the fifth column to the ninth column.

[0223] It should be noted that although Figures 1 to 18 use a three-fold foldable electronic device as an example for illustration, in other embodiments, the technical solution of providing an opening area 121a with a through hole 121c on the first support part 121 in the aforementioned embodiment can also be applied to foldable electronic devices with more than three folds, such as four-fold foldable electronic devices, five-fold foldable electronic devices, etc.

[0224] Taking a four-fold foldable electronic device as an example, the four-fold foldable electronic device includes three bending areas, so that the four-fold foldable electronic device is folded into four display areas stacked sequentially along the Z-axis in the folded state. In this case, the aforementioned first support portion can be a part of the support layer 120 corresponding to any of the two middle display areas (the two remaining display areas excluding the two outermost display areas in the Z-axis direction among the four display areas stacked sequentially along the Z-axis). In this case, the arbitrary display area is the aforementioned first display area 101, the bending areas on both sides of the first display area 101 are the aforementioned first bending area 104 and second bending area 105, and the display portion corresponding to the first display area 101 is the aforementioned first display portion 111. Of course, in this embodiment, an opening area 121a with a through hole 121c can be provided on the support portion of the support layer 120 corresponding to the remaining display area (the remaining display area excluding the first display area among the two middle display areas), so that the support layer 120 has more opening areas 121a.

[0225] Taking a five-fold foldable electronic device as an example, the five-fold foldable electronic device includes four bending areas, so that the five-fold foldable electronic device is folded into five display areas stacked sequentially along the Z-axis in the folded state. In this case, the aforementioned first support portion can be a part of the support layer 120 corresponding to any one of the three middle display areas (the three remaining display areas excluding the two outermost display areas in the Z-axis direction among the five display areas stacked sequentially along the Z-axis). In this case, the arbitrary display area is the aforementioned first display area, the bending areas on both sides of the first display area are the aforementioned first bending area and second bending area, and the display portion corresponding to the first display area is the aforementioned first display portion. Of course, in this embodiment, an opening area 121a with a through hole 121c can be provided on at least one of the two support portions of the support layer 120 corresponding to the remaining two display areas (the two remaining display areas excluding the first display area among the two middle display areas), so that the support layer 120 has more opening areas 121a. This embodiment does not limit this.

[0226] Finally, it should be noted that specific features, structures, etc., described in this specification can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A foldable display screen, characterized in that, The foldable display screen includes: The display layer includes a first bending portion, a second bending portion, and a first display portion connected between the first bending portion and the second bending portion. The foldable display screen can be folded or unfolded through the first bending portion and the second bending portion. When the foldable display screen is in a folded state, the first display portion is flattened. When the foldable display screen is in a flattened state, the display surfaces of the first bending portion, the first display portion, and the second bending portion are arranged sequentially in the same plane along a first direction. A support layer; the support layer is disposed on the non-display side of the display layer; the support layer includes a first support portion corresponding to the first display portion; wherein, the first support portion includes an opening area, and the opening area has a through hole.

2. The foldable display screen according to claim 1, characterized in that, Both the opening area and the first support portion have a width in the first direction; The width of the opening area is 10% to 50% of the width of the first support portion.

3. The foldable display screen according to claim 1 or 2, characterized in that, In the first direction, the opening area is centrally located on the first support portion.

4. The foldable display screen according to any one of claims 1 to 3, characterized in that, The bending equivalent modulus of the opening area is less than 50 MPa.

5. The foldable display screen according to any one of claims 1 to 4, characterized in that, The opening area is provided with multiple rows of through holes spaced apart in the first direction, and each row of through holes includes one or more through holes spaced apart in the second direction; The second direction is the direction within the plane that is perpendicular to the first direction.

6. The foldable display screen according to claim 5, characterized in that, The through holes in two adjacent columns are staggered.

7. The foldable display screen according to claim 5 or 6, characterized in that, When the foldable display screen switches from the flat state to the folded state, the first bending portion is in the bending state before the second bending portion; in the direction from the first bending portion to the second bending portion, the width of the through holes between different columns decreases sequentially; the width of the through hole is the size of the through hole in the first direction.

8. The foldable display screen according to any one of claims 5 to 7, characterized in that, In the direction from the first bend to the second bend, the length of the through holes between different columns decreases sequentially; the length of the through hole is the size of the through hole in the second direction.

9. The foldable display screen according to claim 5 or 6, characterized in that, When the foldable display screen switches from the flattened state to the folded state, either the first bending part or the second bending part is in the bending state before the other bending part. The multi-row through holes include a first row of through holes to the Nth row of through holes arranged sequentially along the direction from the first bend to the second bend; In the first column of through holes to the jth column of through holes, the first size of the through holes between different columns decreases sequentially along the direction from the first bend to the second bend. From the j-th column to the N-th column of through holes, the second dimension of the through holes in different columns increases sequentially along the direction from the first bend to the second bend; where j is an integer less than N and greater than 1, and N... It is an integer greater than 2; the first dimension and the second dimension are length and / or width.

10. The foldable display screen according to any one of claims 1 to 9, characterized in that, The through hole is an elongated hole, and the length of the through hole extends in the second direction; The second direction is the direction within the plane that is perpendicular to the first direction.

11. The foldable display screen according to claim 10, characterized in that, The ratio of the length of the through hole in the second direction to its width in the first direction is 10 to 100.

12. The foldable display screen according to any one of claims 1 to 11, characterized in that, The first support portion also includes two non-perforated areas; One of the non-perforated areas is located on one side of the perforated area in the second direction, and the other non-perforated area is located on the other side of the perforated area in the second direction.

13. The foldable display screen according to claim 12, characterized in that, The non-perforated area has a size of 2 mm to 10 mm in the second direction.

14. A foldable electronic device, characterized in that, include: Support components; The foldable display screen as described in any one of claims 1 to 13; The foldable display screen is connected to the support assembly via the support layer and switches between the folded state and the flattened state based on the support assembly.

15. The foldable electronic device according to claim 14, characterized in that, The display layer further includes a second display portion and a third display portion, wherein the first bent portion is connected between the first display portion and the second display portion, and the second bent portion is connected between the first display portion and the third display portion; The support assembly includes a first housing, a second housing, a third housing, a first hinge, and a second hinge; the first housing is located between the second housing and the third housing, and is rotatably connected to the second housing via the first hinge, and rotatably connected to the third housing via the second hinge; The first display unit is fixed to the first housing via the first support unit, the second display unit is fixed to the second housing via the second support unit corresponding to the support layer, and the third display unit is fixed to the third housing via the third support unit corresponding to the support layer; the first bending part is movably disposed on the first hinge via the first bending fitting part corresponding to the support layer, and bends based on the first hinge; the second bending part is movably disposed on the second hinge via the second bending fitting part corresponding to the support layer, and bends based on the second hinge.

16. The foldable electronic device according to claim 15, characterized in that, The opening area and the first housing are movably disposed between them.

Images