Folding screen and foldable electronic equipment

Abstract

The invention provides a folding screen and foldable electronic equipment, and relates to the technical field of electronic products. The folding screen comprises a screen body, a supporting piece is arranged on the back face of the screen body, and the supporting piece covers a bendable part of the screen body. The reinforcing piece is additionally arranged on the surface of the side, away from the screen body, of the supporting piece, or the structure of the supporting piece is improved, so that the structural strength of the foldable portion of the folding screen is enhanced. The supporting piece and the reinforcing piece are fixedly connected to the screen body, and the folding screen is of an integral structure. Therefore, the impact resistance of the folding screen can be improved, the failure problems of broken bright spots, black spots and the like of the folding screen are prevented, and the use effect of the folding screen is ensured. And moreover, the movement form of the folding screen is not influenced, and scratching abnormal sound is not generated, so that the use effect of the foldable electronic equipment can be improved. In addition, the folding screen is simple in structural design and convenient to assemble.

Description

Technical Field

[0001] This application relates to the field of electronic product technology, and in particular to a foldable screen and a foldable electronic device. Background Technology

[0002] With the technological advancements in electronic products, users are demanding increasingly thinner and lighter foldable electronic devices (such as foldable phones), leading to a corresponding reduction in the size of components in the hinge mechanism, which challenges the limits of manufacturing processes and overall device rigidity.

[0003] Because the hinge mechanism of foldable electronic devices involves a large number and variety of parts, and these parts have inter-motion coordination, clearances must be allowed between them, inevitably resulting in holes in the hinge mechanism. During reliability tests such as drop ball and tip tests, the screen is prone to failure issues such as bright spots and black spots at the locations of these holes in the hinge mechanism. To address this, the industry typically adds a steel plate to the hinge mechanism. One side of the steel plate is bonded to the corresponding door panel, while the other side is detached from the hinge mechanism and in a free state, thus enhancing the hinge mechanism's support for the screen.

[0004] However, during the switching between unfolded and folded states, the steel sheet may scrape against the door panel, causing abnormal noise and affecting the usability of the electronic device. Summary of the Invention

[0005] This application provides a foldable screen and a foldable electronic device. The foldable screen has better support in the area where the hinge mechanism is located, which can improve the impact resistance of the foldable screen and prevent failure problems such as bright spots and black spots. Furthermore, it can solve the problem of scratching noise caused by the steel sheet, improving the usability of the foldable electronic device.

[0006] The first aspect of this application provides a foldable screen, comprising: a screen body including a first non-bending portion, a bendable portion, and a second non-bending portion arranged sequentially along a first direction; a support sheet attached to the back of the screen body and at least covering the bendable portion; the support sheet including a strong deformation portion, a straight portion, and a weak deformation portion, wherein, in the first direction, the strong deformation portion is located in the middle region of the support sheet, and the straight portion and the weak deformation portion are arranged sequentially on both sides of the strong deformation portion; a reinforcing sheet attached to the side surface of the support sheet facing away from the screen body, and both ends of the reinforcing sheet extending to the straight portion; wherein, the strong deformation portion is provided with a plurality of strip holes, the strip holes extending along a second direction and arranged sequentially at intervals along the first direction, the second direction being perpendicular to the first direction; the weak deformation portion is provided with a plurality of elongated grooves, the elongated grooves being arranged sequentially at intervals along the first direction, and the openings of the elongated grooves facing away from the screen body.

[0007] The first aspect of this application provides a foldable screen in which a support plate is provided on the back of the bendable portion of the screen body. The support plate is provided with a strong deformation portion, a straight portion, and a weak deformation portion, with the straight portion and the weak deformation portion sequentially arranged on both sides of the strong deformation portion in a first direction. By distributing a plurality of strip-shaped holes in the strong deformation portion, extending these holes along a second direction and spaced apart sequentially along the first direction, the strong deformation portion has strong bending performance, and the easy bending direction of the strong deformation portion matches the bending direction of the foldable screen. By opening a plurality of long grooves in the weak deformation portion, extending these grooves along a second direction and spaced apart sequentially along the first direction, the weak deformation portion has moderate bending performance, and the easy bending direction of the weak deformation portion matches the bending direction of the foldable screen. By sequentially providing the strong deformation portion, the straight portion, and the weak deformation portion on the support plate, the bending posture of the support plate matches the bending posture of the bendable portion of the screen body.

[0008] By attaching a reinforcing plate to the side of the support plate facing away from the screen body, the structural strength of the bendable part of the foldable screen can be further increased. The reinforcing plate and the support plate work together to compensate for the insufficient impact resistance of the foldable screen caused by the holes in the hinge mechanism. Furthermore, the reinforcing plate is directly attached to the support plate, which does not affect the movement of the foldable screen and will not produce scratching noises, thus improving the usability of foldable electronic devices.

[0009] In one possible implementation, the reinforcing sheet includes a hollow portion and a solid portion; in a first direction, the solid portion is located on both sides of the hollow portion, the hollow portion covers the strongly deformable portion, and the solid portion covers at least part of the straight portion; wherein, a plurality of hollow holes are distributed in the hollow portion, the hollow holes extend along a second direction and are arranged sequentially at intervals along the first direction; and, along the first direction, the hollow holes and the strip holes are staggered from each other.

[0010] In this way, in the first direction, the hollowed-out portion in the middle region of the reinforcing sheet has better flexibility and stronger bending performance, which can match the deformation posture of the highly deformable portion of the supporting sheet, allowing the bendable portion of the foldable screen to deform stably and smoothly. The solid portions located on both sides of the reinforcing sheet can ensure the structural strength of the reinforcing sheet, enabling it to meet reliability requirements. Furthermore, the solid portions can fit completely into the supporting sheet, facilitating the connection between the reinforcing sheet and the supporting sheet.

[0011] Specifically, by offsetting the perforated holes of the reinforcing plate from the strip-shaped holes of the supporting plate in the first direction, the solid portion of the perforated part of the reinforcing plate provides supplementary support to the location of the strip-shaped holes on the supporting plate. This improves the impact resistance of the bendable part of the foldable screen, prevents failure issues such as bright spots and black spots, and enhances the usability of the foldable screen.

[0012] In one possible implementation, a plurality of perforated holes are sequentially spaced along the second direction on the reinforcing sheet.

[0013] This ensures that the hollowed-out portion of the reinforcing sheet has sufficient deformation capacity, while avoiding excessive extension of the hollowed-out holes, which could affect the reliability and service life of the reinforcing sheet.

[0014] In one possible implementation, adjacent perforations are staggered in the second direction along the first direction.

[0015] In this way, the distribution of perforations within the perforated area is more uniform in the second direction. During deformation, the bending stress is more evenly distributed, resulting in higher reliability and consistency of the reinforcing sheet.

[0016] In one possible implementation, the perforations at both ends of the perforated portion are spaced along a first direction and connected to the end face of the reinforcing sheet at intervals.

[0017] In this way, every other row of perforations breaks the end face of the reinforcing sheet, disrupting its integrity. This gives the end face of the reinforcing sheet good bendability, ensuring the overall bending performance of the perforated portion.

[0018] In one possible implementation, all areas of the reinforcing sheet are bonded to the supporting sheet.

[0019] Because the central area of ​​the reinforcing sheet is hollowed out, the hollowed-out portion has strong bending properties and will not affect the deformation posture of the strongly deformable part of the supporting sheet. Therefore, the reinforcing sheet can be bonded to the supporting sheet as a whole to increase the bonding strength between the reinforcing sheet and the supporting sheet.

[0020] In one possible implementation, the thickness of the reinforcing sheet is 0.05mm-0.10mm.

[0021] In this way, the reinforcing sheet is slightly thicker, and the hollowed-out design meets the bending performance requirements of the reinforcing sheet. At the same time, the thickness of the reinforcing sheet is not too large, so it does not have a significant impact on the overall thickness of the foldable screen, which can meet the ultra-thin requirements of foldable electronic devices.

[0022] In one possible implementation, the reinforcing sheet is a solid sheet.

[0023] In this way, the reinforcing plate has higher structural strength and better support, allowing for arbitrary placement of the strip holes on the support plate. The reinforcing plate can provide supplementary support at the locations of the strip holes on the support plate. This can improve the impact resistance of the bendable part of the foldable screen, prevent failure problems such as bright spots and black spots, and improve the performance of the foldable screen.

[0024] In one possible implementation, the reinforcing sheet is bonded to the flat portion of the supporting sheet.

[0025] In this way, the straight portions of the reinforcing sheet and the supporting sheet are completely fitted together, resulting in a large bonding area and ensuring the bonding strength between them. At the same time, the strong deformation portions of the reinforcing sheet and the supporting sheet are separated from each other with gaps, so the reinforcing sheet does not affect the bending of the strong deformation portion of the supporting sheet, and the reinforcing sheet itself can also be bent flexibly with the supporting sheet.

[0026] In one possible implementation, the thickness of the reinforcing sheet is 0.02mm-0.05mm.

[0027] This reduces the thickness of the reinforcing sheet, lowering its structural strength while enhancing its bending performance to meet the requirement of flexible bending along with the support sheet. Simultaneously, the thickness of the reinforcing sheet is not too small, ensuring its machinability and reliability.

[0028] In one possible implementation, the strongly deformable portion includes a regular region and a gradient region, with the gradient region located on both sides of the regular region and adjacent to the straight portion; wherein, the strip holes distributed in the regular region include regular strip holes that form a closed shape and have a consistent extension length, and each column of strip holes arranged along the second direction in the gradient region includes gradient strip holes that form a closed shape and have a consistent extension length, with the extension length of the gradient strip holes being less than the extension length of the regular strip holes.

[0029] In this way, the regular strip-shaped holes maintain a consistent deformation capacity throughout the regular area, which is more conducive to bending in the regular area and meets the requirements for large-amplitude bending. The gradual strip-shaped holes distributed in each column of the gradual zone ensure that the deformation stress in the second direction of the gradual zone is basically the same. Furthermore, the extension length of the gradual strip-shaped holes is shorter than that of the regular strip-shaped holes, and the solid parts in the gradual zone occupy a larger area. The gradual zone can better buffer and absorb bending stress, improving the reliability and service life of the support plate.

[0030] In one possible implementation, the extension length of the gradient strip hole gradually shortens from the side of the gradient area closer to the regular area to the side of the gradient area farther from the regular area.

[0031] In this way, a gradient change from soft to hard is also achieved within the gradient zone, which can better balance bending requirements and stress absorption.

[0032] In one possible implementation, the distance between the edge of the reinforcing sheet and the edge of the straight portion of the support sheet is less than or equal to 1.5 mm.

[0033] In this way, the reinforcing plate can completely cover the supporting plate as much as possible, and can completely or as much as possible cover the holes in the hinge mechanism to ensure the impact resistance of the foldable screen. Furthermore, it allows for more accurate positioning of the reinforcing plate.

[0034] A second aspect of this application provides a foldable screen, comprising: a screen body including a first non-bending portion, a bendable portion, and a second non-bending portion arranged sequentially along a first direction; a support sheet attached to the back of the screen body and at least covering the bendable portion; the support sheet includes a strong deformation portion, a straight portion, and a weak deformation portion, wherein, in the first direction, the strong deformation portion is located in the middle region of the support sheet, and the straight portion and the weak deformation portion are arranged sequentially on both sides of the strong deformation portion; wherein, the strong deformation portion is provided with a plurality of first blind slots and a plurality of second blind slots, both the first blind slots and the second blind slots extending along a second direction to both ends of the strong deformation portion, the second direction being perpendicular to the first direction; and, the opening of the first blind slot faces the screen body, the opening of the second blind slot faces away from the screen body, and the first blind slots and the second blind slots are arranged alternately along the first direction; the weak deformation portion is provided with a plurality of elongated slots, the elongated slots being arranged at intervals along the first direction, and the openings of the elongated slots facing away from the support sheet.

[0035] The second aspect of this application provides a foldable screen by setting multiple first and second blind slots on the highly deformable portion of the support sheet, with each first and second blind slot extending along a second direction and sequentially arranged along a first direction. This gives the highly deformable portion of the support sheet strong bending performance, and the bendable direction of the highly deformable portion matches the bending direction of the foldable screen. Specifically, the openings of each first blind slot face the screen body, and the openings of each second blind slot face away from the screen body, with the first and second blind slots alternately arranged along the first direction. This results in good thickness uniformity of the highly deformable portion of the support sheet, eliminating weak points and ensuring good consistency and high reliability. Furthermore, during drop ball impact tests or pointed impact tests on the foldable electronic device, when a small ball or pointed object impacts a first blind slot on the support sheet, the solid portion between adjacent second blind slots on the other side of the support sheet provides supplementary support. This enhances the support strength of the highly deformable portion of the support sheet and improves the impact resistance of the bendable portion of the foldable screen.

[0036] In one possible implementation, the orthographic projection of the first blind groove onto the support plate does not overlap with the orthographic projection of the second blind groove onto the support plate.

[0037] This design avoids weak points in the high-deformation sections of the support sheet, ensuring the overall reliability of the support sheet. The area on the other side of the support sheet corresponding to the first blind slot is entirely solid, providing better support and increasing the impact resistance of the bendable portion of the foldable screen.

[0038] In one possible implementation, the width of the first blind slot is smaller than the width of the second blind slot.

[0039] In this way, the first blind slot has a smaller space, while the second blind slot has a larger space. The space inside the first blind slot is easier to compress and shrink, while the space inside the second blind slot is easier to expand and open. The support piece is also easier to bend and protrude away from the screen body, which is more conducive to the application of the support piece in foldable electronic devices with an inward folding structure. Furthermore, the support piece provides better support for the screen body and has a stronger ability to withstand impacts from small balls or sharp points.

[0040] In one possible implementation, the depth of the first blind slot is less than the depth of the second blind slot.

[0041] In this way, the space of the first blind slot is small and the space of the second blind slot is large, making it easier for the support piece to bend and protrude away from the screen body.

[0042] In one possible implementation, the thickness of the strongly deformed portion is 0.10 mm to 0.15 mm.

[0043] In this way, the thickness of the high-strength deformation section is very thin, which meets the bending requirements. At the same time, the thickness of the high-strength deformation section is not too small, which meets the requirements for machinability.

[0044] A third aspect of this application provides a foldable screen, comprising: a screen body including a first non-bending portion, a bendable portion, and a second non-bending portion arranged sequentially along a first direction; a support sheet attached to the back of the screen body and at least covering the bendable portion; the support sheet includes a strong deformation portion, a straight portion, and a weak deformation portion, wherein, in the first direction, the strong deformation portion is located in the middle region of the support sheet, and the straight portion and the weak deformation portion are arranged sequentially on both sides of the strong deformation portion; wherein, the strong deformation portion is provided with a plurality of blind grooves and a plurality of first strip holes, the blind grooves extending along a second direction to both ends of the strong deformation portion, the first strip holes extending along the second direction and spaced apart, the second direction being perpendicular to the first direction; and, along the first direction, the blind grooves and the first strip holes are arranged sequentially spaced apart along the first direction; the weak deformation portion is provided with a plurality of elongated grooves, the elongated grooves being arranged sequentially spaced apart along the first direction, and the openings of the elongated grooves facing away from the support sheet.

[0045] The foldable screen provided in the third aspect of this application, by setting multiple blind slots and multiple first strip holes on the support sheet, such that each blind slot and each first strip hole extends along the second direction and is alternately arranged sequentially along the first direction, gives the highly deformable portion of the support sheet strong bending performance, and the bendable direction of the highly deformable portion matches the bending direction of the foldable screen. Since the blind slots do not penetrate both sides of the thickness direction of the support sheet, the highly deformable portion of the support sheet needs to have a certain thickness to meet the processability requirements of the blind slots, which can increase the structural strength of the highly deformable portion. The setting of the first strip holes further enhances the bending performance of the highly deformable portion, meeting the bending requirements of the foldable screen. Therefore, the highly deformable portion provides better support for the bendable portion of the screen, which can enhance the impact resistance of the bendable portion of the foldable screen.

[0046] In one possible implementation, the first strip-shaped holes located at both ends of the strongly deformed portion are connected to the end face of the support piece.

[0047] In this way, the opening density and uniformity of the openings formed on the end face of the high-deformation section are higher, resulting in better bending performance and enabling greater bending. Furthermore, the overall bending performance of the high-deformation section is more uniform, and the flatness after bending is higher, which is beneficial to improving the display effect of the foldable screen.

[0048] In one possible implementation, the bottom of the blind groove is provided with a second strip-shaped hole, which extends along a second direction and is spaced apart.

[0049] In this way, the second strip-shaped hole increases the opening area of ​​the high-deformation section, which can reduce the structural strength of the high-deformation section and is more conducive to the large-scale bending of the high-deformation section. In particular, by setting multiple second strip-shaped holes at intervals along the second direction, the bending performance of the high-deformation section in the second direction is ensured to be balanced, and the extension length of the second strip-shaped holes is avoided to prevent it from affecting the reliability of the support plate.

[0050] In one possible implementation, each of the second strip holes forms a closed shape.

[0051] In this way, the second strip-shaped holes located at both ends of the high-deformation section in the second direction will not connect with the end face of the support piece, ensuring the structural strength of the edge area of ​​the support piece. At both ends of the support piece, the two side walls of the blind groove are connected by a solid groove bottom, which can improve the support of the high-deformation section and enhance the impact resistance of the bendable part of the foldable screen.

[0052] In one possible implementation, the slot opening of the blind slot faces the screen body.

[0053] In this way, the strong deformation part can bend and protrude away from the screen body more easily, which is more conducive to the application of the support sheet in foldable electronic devices with an inward folding structure.

[0054] In one possible implementation, the thickness of the strongly deformed portion is 0.15mm-0.20mm.

[0055] In this way, the thickness of the high-deformation section is relatively large, which enhances its support and helps improve the impact resistance of the bendable part of the foldable screen. At the same time, the thickness of the high-deformation section is not too large, so it will not affect the bending performance of the high-deformation section.

[0056] In one possible implementation, the thickness of the straight portion is 0.25mm-0.35mm.

[0057] In this way, the thickness of the flat section is relatively large, resulting in higher overall reliability of the support sheet. At the same time, the flat section provides stronger support for the screen body, and the support sheet provides better overall support for the bendable part of the screen body, thus improving the impact resistance of the bendable part of the foldable screen.

[0058] In one possible implementation, the foldable screen further includes a reinforcing sheet attached to the side surface of the support sheet opposite to the screen body, with both ends of the reinforcing sheet extending to the flat portion.

[0059] In this way, the reinforcing sheet and the supporting sheet work together to further enhance the support for the bendable part of the screen body, and significantly improve the impact resistance of the bendable part of the foldable screen.

[0060] A fourth aspect of this application provides a foldable electronic device, including a housing assembly and a foldable screen as described above, the foldable screen being mounted on the housing assembly.

[0061] The foldable electronic device provided in this application includes the aforementioned foldable screen, which has all the technical effects of a foldable screen, and will not be described in detail here. Attached Figure Description

[0062] Figure 1 A schematic diagram of the structure of the foldable electronic device provided in the embodiment of this application when it is in the unfolded state;

[0063] Figure 2 for Figure 1 A schematic diagram of the structure of the foldable electronic device in the folded state;

[0064] Figure 3 for Figure 1 A schematic diagram of the structure of the foldable electronic device in a semi-expanded state;

[0065] Figure 4 An exploded view of the foldable electronic device provided in an embodiment of this application;

[0066] Figure 5 This is a partial structural diagram of a foldable electronic device in related technologies;

[0067] Figure 6 A partial structural diagram of the first type of foldable screen in the unfolded state, provided in an embodiment of this application;

[0068] Figure 7 for Figure 6 A partial structural diagram of the foldable screen when it is in a folded state;

[0069] Figure 8 for Figure 6 A partial exploded view of the foldable screen in the image;

[0070] Figure 9 for Figure 8 A partial structural diagram of the reinforcing sheet in the folding screen shown;

[0071] Figure 10 for Figure 6 A partial cross-sectional view of the foldable screen in its unfolded state;

[0072] Figure 11 This is a partial structural diagram of a second type of foldable screen provided in an embodiment of this application;

[0073] Figure 12 for Figure 11 A schematic diagram of the reinforcing sheet structure of the folding screen shown;

[0074] Figure 13 for Figure 11 A partial exploded view of the foldable screen in the image;

[0075] Figure 14 for Figure 11 A partial cross-sectional view of the foldable screen in the image;

[0076] Figure 15 A structural diagram of a support sheet in an unfolded state, provided in an embodiment of this application;

[0077] Figure 16 for Figure 15 A schematic diagram of the structure when the support piece is in a folded state;

[0078] Figure 17 A partial side view of a third type of foldable screen provided in an embodiment of this application;

[0079] Figure 18 for Figure 17 A partial structural diagram of the support piece in the folding screen shown;

[0080] Figure 19 A partial side view of a fourth type of foldable screen provided in an embodiment of this application;

[0081] Figure 20 for Figure 19 The partial structure of the support sheet in the folding screen shown.

[0082] Explanation of reference numerals in the attached figures:

[0083] 1- Foldable electronic devices;

[0084] 10 - Display screen;

[0085] 10a - Foldable screen; 10b - Flat screen;

[0086] 101 - First non-bending part; 102 - Bending part; 103 - Second non-bending part;

[0087] 100 - Screen body; 200 - Support piece; 300 - Reinforcing piece; 400 - Adhesive layer;

[0088] 210 - Strongly deformed section; 210a - Regular area; 210b - Gradient area; 220 - Straight section; 230 - Weakly deformed section; 310 - Hollowed-out section; 320 - Solid section;

[0089] 211-Strip hole; 211a-Regular strip hole; 211b-Gradual strip hole; 212-First blind groove; 213-Second blind groove; 214-Blind groove; 215-First strip hole; 216-Second strip hole; 234-Long groove; 311-Hollow hole;

[0090] 20 - Housing assembly;

[0091] 21-First housing; 22-Second housing; 23-Rotating shaft mechanism;

[0092] 201-Middle frame; 202-Back cover; 231-Door panel; 232-Steel sheet; 233-Adhesive backing. Detailed Implementation

[0093] The terminology used in the implementation section of this application is for the purpose of explaining specific embodiments of this application only, and is not intended to limit this application.

[0094] This application provides a foldable electronic device, which can be a consumer electronics product. Exemplary examples include, but are not limited to, foldable electronic products such as foldable mobile phones, laptop computers, notebook computers, netbooks, personal digital assistants (PDAs), personal computers, multimedia players, e-book readers, in-vehicle devices, virtual reality (VR) devices, augmented reality (AR) devices, or wearable devices. Wearable devices include, but are not limited to, smart bracelets, smartwatches, smart head-mounted displays, and smart glasses.

[0095] Figure 1 This is a schematic diagram of the structure of the foldable electronic device provided in the embodiment of this application when it is in the unfolded state. Figure 2 for Figure 1 A schematic diagram of the foldable electronic device in the picture when it is in a folded state. Figure 3 for Figure 1 A schematic diagram of the foldable electronic device in its semi-expanded state. (Refer to...) Figures 1 to 3 As shown, this embodiment uses a foldable mobile phone as an example for illustration.

[0096] For the foldable electronic device 1, it can have different usage states in different usage scenarios. Figure 1 The foldable electronic device 1 is shown in its unfolded state. The unfolding angle α of the foldable electronic device 1 is, for example, 180°. At this time, the foldable electronic device 1 can realize a large screen display. Figure 2 The foldable electronic device 1 is shown in a folded state, in which the foldable electronic device 1 is small in size and easy to carry. Figure 3 A foldable electronic device 1 is shown in a semi-expanded state, where it hovers at an angle between the unfolded and folded states. The foldable electronic device 1 can be supported on a support surface (e.g., a desktop). For example, the hovering angle β of the foldable electronic device 1 can be 120°, 130°, 140°, or 150°, etc.

[0097] It should be noted that the angles illustrated in this embodiment are allowed to have slight deviations. For example, Figure 1 The unfolding angle α of the foldable electronic device 1 shown is 180°, meaning that the unfolding angle α can be 180°, or approximately 180°, such as 170°, 175°, 185°, or 190°. The angles illustrated in the following text can be understood in the same way.

[0098] in addition, Figures 1 to 3 The foldable electronic device 1 shown is an electronic device capable of folding once. The foldable electronic device 1 includes two parts that can rotate relative to each other. When the two parts rotate to be coplanar, the foldable electronic device 1 is in an unfolded state (e.g., ...). Figure 1 (As shown). When the two parts are rotated to overlap, the foldable electronic device 1 is in a folded state (as shown). Figure 2 (As shown). When the two parts are rotated to a certain angle between the unfolded and folded states, the foldable electronic device 1 is in a semi-unfolded state (as shown). Figure 3 (As shown).

[0099] In other embodiments, the foldable electronic device 1 may also be an electronic device capable of folding more than twice. In this case, the foldable electronic device 1 may include multiple parts that are rotatably connected in sequence, with adjacent parts being able to move away from each other to unfold into an unfolded state, and adjacent parts being able to move closer together to fold into a folded state.

[0100] Figure 4 This is an exploded structural diagram of a foldable electronic device provided in an embodiment of this application. (Refer to...) Figure 4As shown, the foldable electronic device 1 includes a display screen 10 and a housing assembly 20. One side surface of the display screen 10 is used to display images, text, and other information; this side surface is typically defined as its front surface, and the opposite side surface is its back surface. The housing assembly 20 surrounds the periphery and back surface of the display screen 10, providing support, fixation, and protection for the display screen 10. The front surface of the display screen 10 is exposed outside the housing assembly 20, allowing the user to view the content displayed on the display screen 10 or perform input operations on the foldable electronic device 1.

[0101] The display screen 10 of the foldable electronic device 1 may include a foldable screen 10a. The foldable screen 10a may include a first non-bending portion 101, a bendable portion 102, and a second non-bending portion 103 arranged sequentially along a first direction. That is, in the first direction, the bendable portion 102 is located between the first non-bending portion 101 and the second non-bending portion 103. The folding method of the foldable electronic device 1 can be... Figures 1 to 3 The horizontal fold shown in the diagram allows the first direction to be... Figure 4 The X direction is shown in the figure. Of course, the foldable electronic device 1 can also be folded vertically, and this embodiment does not limit this.

[0102] For example, the foldable screen 10a can be made of a flexible material so that the bendable portion 102 can be bent. The foldable screen 10a can be an organic light-emitting diode (OLED) display screen 10.

[0103] The housing assembly 20 supports and secures the folding screen 10a, and drives the folding screen 10a to switch between a folded state and an unfolded state. (See reference...) Figure 4 As shown, the housing assembly 20 includes a first housing 21, a second housing 22, and a rotating shaft mechanism 23. The rotating shaft mechanism 23 is connected between the first housing 21 and the second housing 22. The first housing 21 and the second housing 22 are rotatably connected through the rotating shaft mechanism 23, thereby realizing relative rotation between the first housing 21 and the second housing 22.

[0104] The first housing 21 supports and fixes the first non-bending portion 101 of the foldable screen 10a, and the second housing 22 supports and fixes the second non-bending portion 103 of the foldable screen 10a. The bendable portion 102 of the foldable screen 10a is provided corresponding to the pivot mechanism 23. The first non-bending portion 101 of the foldable screen 10a can be attached to the surface of the first housing 21, and the second non-bending portion 103 of the foldable screen 10a can be attached to the surface connected to the second housing 22. The bendable portion 102 of the foldable screen 10a is either not connected to the pivot mechanism 23 or partially connected to the pivot mechanism 23.

[0105] During use, the first non-bending portion 101 and the second non-bending portion 103 of the foldable screen 10a remain in a flat state, while the bendable portion 102 of the foldable screen 10a can be bent. When the pivot mechanism 23 drives the first housing 21 and the second housing 22 to rotate relative to each other, the first non-bending portion 101 and the second non-bending portion 103 of the foldable screen 10a change their orientation accordingly, and the bendable portion 102 of the foldable screen 10a bends or flattens as the orientation of the first non-bending portion 101 and the second non-bending portion 103 changes.

[0106] The first housing 21 and the second housing 22 can rotate in a direction away from each other until they are coplanar. At this time, the housing assembly 20 is in the unfolded state, and the folding screen 10a is also in the unfolded state as the housing assembly 20 unfolds (e.g., Figure 1 (As shown). The first housing 21 and the second housing 22 can also rotate towards each other until they are stacked relative to each other. At this time, the housing assembly 20 is in a folded state, and the folding screen 10a is also in a folded state as the housing assembly 20 is folded (as shown). Figure 2 (As shown).

[0107] It should be noted that the foldable electronic device 1 in this embodiment can be an inward-folding structure. When the foldable electronic device 1 is in the folded state, the first non-bending portion 101 and the second non-bending portion 103 of the foldable screen 10a are relatively close together, and the housing assembly 20 surrounds the foldable screen 10a, with the foldable screen 10a located between the first housing 21 and the second housing 22. Thus, when the foldable electronic device 1 is in the folded state, the foldable screen 10a is not visible to the outside, and the housing assembly 20 can provide protection for the foldable screen 10a to prevent it from being scratched by hard objects.

[0108] If the foldable electronic device 1 with an inward-folding architecture needs to perform a display function in the folded state, a flat screen 10b can be added to the back of the housing assembly 20 (the side of the housing assembly 20 facing away from the folding screen 10a). In the folded state, the foldable electronic device 1 relies on this flat screen 10b to perform the display function (see...). Figure 2 or Figure 3 In other words, the display screen 10 of the foldable electronic device 1 with its inward-folding architecture can include a foldable screen 10a and a flat screen 10b. The foldable screen 10a can be attached to the front of the housing assembly 20, and as the housing assembly 20 moves, the foldable screen 10a switches between an unfolded state and a folded state. When the foldable electronic device 1 is in the folded state, the foldable screen 10a is not visible to the outside. The flat screen 10b can be attached to the back of the housing assembly 20, and the flat screen 10b displays information when the foldable electronic device 1 is in the folded state.

[0109] The foldable electronic device 1 in this embodiment can also be an outward-folding structure. When the foldable electronic device 1 is in the folded state, the first non-bending portion 101 and the second non-bending portion 103 of the foldable screen 10a are opposite to each other, and the housing assembly 20 is located between the first non-bending portion 101 and the second non-bending portion 103. In other words, when the outward-folding foldable electronic device 1 is in the folded state, the foldable screen 10a surrounds the housing assembly 20 and is visible to the outside, allowing for display functionality. Therefore, it is not necessary to add a flat screen 10b to the back of the housing assembly 20 to achieve the display function of the foldable electronic device 1 in the folded state.

[0110] The foldable electronic device 1 in this embodiment can also be a double-fold structure, with both an inward-folded and outward-folded state. In this case, the foldable electronic device 1 can be equipped with a hinge mechanism 23 capable of 360° rotation. The hinge mechanism 23 can drive the first housing 21 and the second housing 22 to fold towards the side where the folding screen 10a is located, so that the housing assembly 20 surrounds the folding screen 10a and the folding screen 10a is not visible to the outside, thus realizing the foldable electronic device 1 in an inward-folded state. The hinge mechanism 23 can also drive the first housing 21 and the second housing 22 to fold away from the side where the folding screen 10a is located, so that the folding screen 10a surrounds the housing assembly 20 and the folding screen 10a is visible to the outside, thus realizing the foldable electronic device 1 in an outward-folded state.

[0111] Furthermore, in some embodiments, particularly the foldable electronic device 1 with an inward-folding architecture, it can hover at an angle between the unfolded and folded states. For example, the hovering angle of the foldable electronic device 1 can be 120°, 130°, 140°, or 150°. The housing assembly 20 can be suspended in a semi-unfolded state between the folded and unfolded states by the damping force provided by the housing assembly 20, and the foldable screen 10a remains in the semi-unfolded state along with the housing assembly 20. At this time, the bendable portion 102 of the foldable screen 10a is also in a bent state, and the degree of bending of the bendable portion 102 is less than the degree of bending when in the folded state. The first non-bending portion 101 and the second non-bending portion 103 of the foldable screen 10a are relatively tilted, and the included angle between the first non-bending portion 101 and the second non-bending portion 103 is, for example, 120°, 130°, 140°, or 150°.

[0112] Continue to refer to Figure 4In the housing assembly 20 of the foldable electronic device 1, both the first housing 21 and the second housing 22 may include a mid-frame 201, and the first non-bending portion 101 and the second non-bending portion 103 of the foldable screen 10a may be supported on the front of the corresponding mid-frame 201. When the foldable electronic device 1 has an outward-folding structure or an inward-folding structure without an additional flat screen 10b, both the first housing 21 and the second housing 22 of the housing assembly 20 may also include a back cover 202, which is connected to the side surface of the mid-frame 201 facing away from the foldable screen 10a. When the foldable electronic device 1 has an inward-folding structure with an additional flat screen 10b, one of the first housing 21 and the second housing 22 may not include the back cover 202, and instead, the flat screen 10b may be mounted on the back of the mid-frame 201.

[0113] In the first housing 21 and the second housing 22, the middle frame 201 and the rear cover 202 (or the flat screen 10b) together form a receiving cavity, which is used to install some functional components (not shown in the figure) of the foldable electronic device 1. For example, the receiving cavity is used to install circuit boards, batteries, camera modules, microphones, speakers and other components.

[0114] As described in the background section, due to the large number and variety of parts assembled on the hinge mechanism 23, and the inherent movement gaps between these parts due to their inter-motion coordination, the hinge mechanism 23 contains unavoidable holes. During reliability tests such as drop ball impact and pointed head impact on the foldable electronic device 1, the hinge mechanism 23 provides poor support for the foldable screen 10a at the locations of these holes. This results in insufficient impact resistance, leading to issues such as bright spots and black spots on the foldable screen 10a, thus affecting its usability.

[0115] The ball drop impact test involves using a small ball of a certain diameter (e.g., φ20) to fall freely or under gravitational acceleration onto the foldable screen 10a of the foldable electronic device 1. The pointed impact test involves using a cylinder with a conical pointed tip (e.g., the minimum diameter of the pointed tip is φ2) to fall freely or under gravitational acceleration onto the foldable screen 10a of the foldable electronic device 1. To ensure the reliability of the foldable electronic device 1, testing personnel conduct repeated tests, especially on the area where the hinge mechanism 23 is located (e.g., the location of the holes), before the device leaves the factory.

[0116] Figure 5 This is a partial structural diagram of a foldable electronic device in related technologies. (Refer to...) Figure 5As shown, to address the issue of bright spots and black spots easily appearing at the hole location of the hinge mechanism 23 in the foldable screen 10a, related technologies add a steel sheet 232 to the hinge mechanism 23. The steel sheet 232 supports the bendable portion 102 of the foldable screen 10a to enhance the support of the hinge mechanism 23 for the bendable portion 102 and compensate for the poor impact resistance of the foldable screen 10a caused by the hole location of the hinge mechanism 23. One side of the steel sheet 232 is bonded to the corresponding door panel 231 with adhesive 233, while the other side of the steel sheet 232 is separate from the door panel 231 and in a free state, allowing the steel sheet 232 to move relative to the foldable screen 10a as the door panel 231 moves.

[0117] However, since one side of the steel sheet 232 is separated from the door panel 231, when the foldable electronic device 1 switches between the unfolded and folded states, the steel sheet 232 and the components on the pivot mechanism 23 move relative to each other, causing the steel sheet 232 and the components on the pivot mechanism 23 to rub against each other, producing abnormal noise. Consequently, this affects the usability of the foldable electronic device 1.

[0118] In view of this, the embodiments of this application improve the foldable screen 10a. The foldable screen 10a includes a screen body, and a support plate is provided on the back of the screen body, covering the bendable portion 102 of the screen body. Based on this, by adding a reinforcing plate to the surface of the support plate away from the screen body, or by improving the structure of the support plate itself, the structural strength of the foldable screen 10a in the bendable portion 102 is enhanced. With this configuration, both the support plate and the reinforcing plate are fixedly connected to the screen body, making the foldable screen 10a an integral structure. This improves the impact resistance of the foldable screen 10a in the bendable portion 102, preventing failures such as bright spots and black spots, and ensuring the usability of the foldable screen 10a. Furthermore, it does not affect the movement of the foldable screen 10a, and avoids adding a steel plate to the hinge mechanism 23. There is no relative movement between the steel plate and the components of the hinge mechanism 23, preventing scraping noises and improving the usability of the foldable electronic device 1. In addition, the foldable screen 10a has a simple structural design and is easy to assemble.

[0119] Figure 6 This is a partial structural diagram of the first type of foldable screen in the unfolded state, as provided in the embodiments of this application. Figure 7 for Figure 6 A partial structural diagram of the foldable screen when it is in a folded state. Figure 8 for Figure 6 A partial exploded view of the foldable screen in the image.

[0120] Reference Figure 6 and Figure 7As shown in the figure, a first type of foldable screen 10a according to an embodiment of this application is illustrated. The foldable screen 10a includes a screen body 100 and a support piece 200. The screen body 100 is the core functional structure of the foldable screen 10a. The screen body 100 includes a first non-bending portion 101, a bendable portion 102, and a second non-bending portion 103 as described above. The first non-bending portion 101, the bendable portion 102, and the second non-bending portion 103 are arranged sequentially along a first direction. The front side of the screen body 100 is used to display images, text, and other information, and the support piece 200 is attached to the back side of the screen body 100.

[0121] The support piece 200 is mainly used to support the bendable portion 102 of the screen body 100, thereby enhancing the structural strength of the bendable portion 102 and improving its impact resistance. Therefore, the support piece 200 should be able to completely cover the bendable portion 102 of the screen body 100. Furthermore, the support piece 200 can be a metal sheet with good structural strength to meet its functional requirements. For example, the support piece 200 can be a stainless steel sheet. The support piece 200 can be bonded to the back of the screen body 100 using an adhesive. Alternatively, when the back of the screen body 100 is a metal structural layer, the support piece 200 can also be welded to the screen body 100.

[0122] In some examples, the support piece 200 only covers the bendable portion 102 of the screen body 100 (of course, the edge of the support piece 200 can extend slightly beyond the bendable portion 102). In this case, a shallow groove can be provided on the back of the screen body 100 in the bendable portion 102, and the support piece 200 can be fitted into the shallow groove. Positioning the support piece 200 through the shallow groove can also reduce the overall thickness of the foldable screen 10a. In other examples, the support piece 200 can also extend to the side edges near the screen body 100, and the support piece 200 also covers the first non-bendable portion 101 and the second non-bendable portion 103 of the screen body 100, which is equivalent to the support piece 200 completely covering the screen body 100.

[0123] The following explanation will be based on the example where the support piece 200 only covers the bendable portion 102 of the screen body 100.

[0124] Reference Figure 8 As shown, the support piece 200 includes a strong deformation portion 210, a straight portion 220, and a weak deformation portion 230 arranged sequentially. In the first direction ( Figure 8 (As shown in the X direction), the strongly deformable portion 210 is located in the middle region of the support piece 200, and the straight portion 220 and the weakly deformable portion 230 are sequentially arranged on both sides of the strongly deformable portion 210. Combined with Figure 6 and Figure 7As shown, the strong deformation portion 210 covers the area of ​​the bendable portion 102 of the screen body 100 with the greatest deformation, the flat portion 220 covers the area of ​​the bendable portion 102 with almost no deformation, and the weak deformation portion 230 covers the area of ​​the screen body 100 with less deformation. Specifically, taking the foldable electronic device 1 as an inward folding structure, and the bendable portion 102 as a teardrop shape when the foldable screen 10a is in the folded state as an example, the strong deformation portion 210 of the support piece 200 covers the large arc area at the bottom of the teardrop-shaped bendable portion 102, the flat portion 220 covers the conical extension area in the middle of both sides of the bendable portion 102, and the weak deformation portion 230 covers the tapered area at the top of both sides of the bendable portion 102.

[0125] In this regard, the strong deformation portion 210 of the support plate 200 has a large degree of deformation, the flat portion 220 hardly deforms, and the weak deformation portion 230 has a small degree of deformation. Therefore, the strong deformation portion 210 requires a high degree of deformation capacity, the flat portion 220 requires almost no deformation capacity (or in other words, the flat portion 220 only needs to have a very weak deformation capacity), and the weak deformation portion 230 requires a small degree of deformation capacity. Based on this, the structural shape of each part of the support plate 200 can be designed.

[0126] Continue to refer to Figure 8 In some embodiments, the strongly deformable portion 210 of the support sheet 200 may have a plurality of strip-shaped holes 211 distributed along a second direction perpendicular to the first direction. Figure 8 As shown in the Y direction, the strip holes 211 extend sequentially and spaced apart along the first direction. Thus, the high-deformation section 210 has a hollow structure, exhibiting good bending performance to meet its deformation requirements. Furthermore, the high-deformation section 210 is more easily bent along the extension direction of the strip holes 211, enabling the unfolding and folding of the folding screen 10a.

[0127] In this configuration, each column of strip-shaped holes 211, spaced apart sequentially along the first direction, may include multiple strip-shaped holes 211 spaced apart sequentially along the second direction. This ensures that the highly deformable portion 210 of the support piece 200 has sufficient deformation capacity while preventing excessive extension length of the strip-shaped holes 211, thus preventing breakage of the support piece 200 at excessively long strip-shaped holes 211 and guaranteeing the reliability and service life of the support piece 200.

[0128] Furthermore, along the first direction, the strip holes 211 in each adjacent pair of columns can be staggered. In other words, the positions of each strip hole 211 in each adjacent pair of columns of strip holes 211 can be staggered in the second direction. This results in a more uniform distribution of the strip holes 211 within the high-deformation section 210 in the second direction, preventing uneven density of the strip holes 211, where some areas have excessively large opening areas while others have excessively small opening areas or even no openings. During deformation, the bending stress of the support piece 200 is more evenly distributed, improving the consistency and reliability of the support piece 200.

[0129] For example, in the first direction, at every interval of a row of strip holes 211, the strip holes 211 located at both ends of the strongly deformable portion 210 of the support piece 200 (in the second direction) can communicate with the end face of the support piece 200. In this way, at every interval of a row of strip holes 211, the end face of the support piece 200 is interrupted, disrupting the integrity of the end face of the support piece 200. This gives the end face of the support piece 200 good bendability, ensuring the overall bending performance of the strongly deformable portion 210 of the support piece 200.

[0130] Continue to refer to Figure 8 The flat portion 220 of the support sheet 200 can be a solid structure to enhance the overall structural strength of the support sheet 200 and improve its reliability. Since the thickness of the support sheet 200 is usually very small, generally less than or equal to 0.3mm, the flat portion 220 of the support sheet 200 also has a certain deformation capability. The flat portion 220 can conform to the deformation trend of the corresponding area of ​​the bendable portion 102 in the screen body 100 and fit closely with the corresponding area of ​​the bendable portion 102.

[0131] The weak deformation portion 230 of the support piece 200 may have multiple elongated slots 234. These slots 234 may be arranged sequentially at intervals along a first direction, and each slot 234 may extend along a second direction, reaching the end faces of both ends of the support piece 200 (in the second direction). In this way, these slots 234 can enhance the bending performance of the weak deformation portion 230, allowing it to deform along with the corresponding portion of the bendable portion 102 of the screen body 100. Furthermore, the through-type slots 234 ensure that the deformation capacity of each part of the weak deformation portion 230 in the second direction remains consistent, supporting the smooth deformation of the screen body 100 and preventing the screen body 100 from being pulled.

[0132] In this design, the slot 234 on the weak deformation portion 230 can face away from the screen body 100, and the surface of the weak deformation portion 230 facing the screen body 100 is a complete flat plane. This provides better support for the corresponding area of ​​the screen body 100, eliminating issues such as bulging or denting in that area and improving the impact resistance of that area. Furthermore, both the straight portion 220 and the weak deformation portion 230 of the support piece 200 are fully fitted to the screen body 100, increasing the connection area between the support piece 200 and the screen body 100, improving the connection strength, and enhancing the overall integrity of the foldable screen 10a.

[0133] Reference Figures 6 to 8 As shown in any one of the examples, in addition to the support piece 200, the foldable screen 10a may also include a reinforcing piece 300. The reinforcing piece 300 is attached to the surface of the support piece 200 facing away from the screen body 100, and covers the bendable portion 102 of the screen body 100. Adding the reinforcing piece 300 to the support piece 200 can further increase the structural strength of the bendable portion 102 of the foldable screen 10a. Furthermore, the reinforcing piece 300 covers the area where the hinge mechanism 23 is located, working together with the support piece 200 to compensate for the insufficient impact resistance of the foldable screen 10a caused by the holes in the hinge mechanism 23. This improves the impact resistance of the foldable screen 10a in the bendable portion 102, preventing failures such as bright spots and black spots during reliability testing and use of the foldable device, thus ensuring the performance of the foldable screen 10a.

[0134] In this embodiment, the reinforcing sheet 300 is directly attached to the support sheet 200 to assemble the foldable screen 10a. While improving the impact resistance of the foldable screen 10a, the reinforcing sheet 300 can deform with the bendable portion 102 of the screen body 100 without affecting the movement of the foldable screen 10a. Compared to related technologies where the steel sheet is fixed to the hinge mechanism 23, there is no issue of relative movement between the reinforcing sheet 300 and the components of the hinge mechanism 23. Therefore, no scraping noises are generated, improving the usability of the foldable electronic device 1.

[0135] Furthermore, by sequentially attaching the support piece 200 and the reinforcing piece 300 to the screen body 100, the foldable screen 10a can be assembled. The foldable screen 10a has a simple structural design and is easy to assemble. Modular production of the foldable screen 10a is possible, making it highly practical.

[0136] Similar to the support piece 200, the reinforcing piece 300 can also be a metal sheet with good structural strength to meet the functional requirement of improving the impact resistance of the reinforcing piece 300. For example, the reinforcing piece 300 can be a stainless steel sheet. An adhesive layer can be provided between the reinforcing piece 300 and the support piece 200 (see...). Figure 8 (As shown), the reinforcing sheet 300 is bonded to the support sheet 200. Alternatively, welding can be used to connect the reinforcing sheet 300 and the support sheet 200, which are both metal sheets.

[0137] In the first direction, the two ends of the reinforcing piece 300 can extend to the flat portions 220 on opposite sides of the supporting piece 200. The surface of the flat portion 220 is a flat surface, and the reinforcing piece 300 can fit snugly against the flat portion 220, facilitating the connection and fixation of the reinforcing piece 300 and the supporting piece 200. Furthermore, the flat portion 220 of the supporting piece 200 can also be used to position the reinforcing piece 300, ensuring that the reinforcing piece 300 accurately covers the middle area of ​​the bendable portion 102 in the screen body 100. This allows the reinforcing piece 300 to cover the holes on the pivot mechanism 23, ensuring that the reinforcing piece 300 effectively enhances the impact resistance of the bendable portion 102.

[0138] The outline dimensions of the reinforcing piece 300 can be designed according to the outline dimensions of the supporting piece 200, and the distance between the edge of the reinforcing piece 300 and the edge of the straight portion 220 (adjacent to the weakly deformable portion 230) of the supporting piece 200 can be controlled within a small range. In this way, the reinforcing piece 300 can completely or as much as possible cover the holes of the pivot mechanism 23 to ensure the impact resistance of the folding screen 10a. Furthermore, the position of the reinforcing piece 300 can be positioned more accurately.

[0139] It should be noted that, due to the small thickness of the support piece 200, it is not convenient to make shallow grooves on the support piece 200 to position the reinforcing piece 300. The reinforcing piece 300 can be directly attached to the surface of the support piece 200. Therefore, the smaller the distance between the edge of the reinforcing piece 300 and the edge of the straight portion 220 of the support piece 200, the higher the positioning accuracy of the reinforcing piece 300.

[0140] For example, the distance between the edge of the reinforcing sheet 300 and the edge of the straight portion 220 of the support sheet 200 can be less than or equal to 1.5 mm. For instance, the edge of the reinforcing sheet 300 and the edge of the straight portion 220 can be flush, or the distance between the edge of the reinforcing sheet 300 and the edge of the straight portion 220 can be 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, etc.

[0141] Figure 9 for Figure 8 A partial structural diagram of the reinforcing plate in the folding screen is shown. (Refer to...) Figure 9As shown, in order to enhance the bending performance of the reinforcing sheet 300 and enable the reinforcing sheet 300 to bend flexibly with the supporting sheet 200, in some embodiments, the reinforcing sheet 300 may include a hollow portion 310 and a solid portion 320. Along the first direction, the hollow portion 310 may be located in the middle region of the reinforcing sheet 300, and the solid portion 320 may be located on both sides of the hollow portion 310.

[0142] The hollow portion 310 of the reinforcing sheet 300 can cover the strong deformation portion 210 of the support sheet 200. The hollow portion 310 is hollowed out, which makes the hollow portion 310 more flexible and has good bending properties. It can match the deformation posture of the strong deformation portion 210 of the support sheet 200, so that the bendable portion 102 of the foldable screen 10a can deform more stably and smoothly.

[0143] The solid portions 320 on both sides of the hollow portion 310 mainly correspond to the straight portions 220 of the support piece 200. Similar to the straight portions 220 of the support piece 200, the solid portions 320 of the reinforcing piece 300 can be solid structures. The provision of solid portions 320 ensures that the reinforcing piece 300 has sufficient structural strength to meet the reliability requirements of the reinforcing piece 300. Furthermore, the solid portions 320 can completely fit into the straight portions 220 of the support piece 200, facilitating the connection between the reinforcing piece 300 and the support piece 200.

[0144] For example, in the first direction, the width of the hollow portion 310 of the reinforcing sheet 300 can match the width of the strong deformation portion 210 of the support sheet 200. When the foldable electronic device 1 has an inward folding structure and the foldable screen 10a is in the folded state, the reinforcing sheet 300 wraps around the outside of the support sheet 200, and the width of the hollow portion 310 of the reinforcing sheet 300 can also be slightly larger than the width of the strong deformation portion 210 of the support sheet 200 to meet the bending stroke requirements of the reinforcing sheet 300. The solid portions 320 on both sides of the reinforcing sheet 300 can extend as far as possible toward the edge of the straight portion 220 of the support sheet 200 (the side away from the strong deformation portion 210) to increase the contact area between the reinforcing sheet 300 and the support sheet 200 and enhance the connection strength between the two.

[0145] Because the central area of ​​the reinforcing sheet 300 is a hollow portion 310, which has strong bending properties, it will not affect the deformation posture of the highly deformable portion 210 of the supporting sheet 200. Therefore, when the reinforcing sheet 300 is bonded to the supporting sheet 200, the solid portion 320 of the reinforcing sheet 300 can be bonded to the straight portion 220 of the supporting sheet 200. Furthermore, the hollow portion 310 of the reinforcing sheet 300 can also be bonded to the supporting sheet 200. In other words, all areas of the reinforcing sheet 300 are bonded to the supporting sheet 200, and the entire reinforcing sheet 300 is bonded to the supporting sheet 200, thereby enhancing the bonding strength between the reinforcing sheet 300 and the supporting sheet 200. (See also...) Figure 8As shown, at this time, the adhesive layer 400 provided between the reinforcing sheet 300 and the supporting sheet 200 can be an integral structure. The adhesive layer 400 can cover the entire reinforcing sheet 300, and the overall bonding between the reinforcing sheet 300 and the supporting sheet 200 is achieved through the adhesive layer 400.

[0146] Furthermore, the design of the hollow portion 310 gives the reinforcing sheet 300 strong bending performance, reducing the need for thinning the reinforcing sheet 300. The thickness of the reinforcing sheet 300 can be slightly larger, within the range of 0.05mm-0.10mm. This ensures that the thickness of the reinforcing sheet 300 is not excessive, and will not significantly affect the overall thickness of the foldable screen 10a, contributing to the ultra-thin design of the foldable electronic device 1. For example, the thickness of the reinforcing sheet 300 can be 0.06mm, 0.07mm, 0.08mm, 0.09mm, etc.

[0147] Continue to refer to Figure 9 Similar to the strip-shaped holes 211 arranged on the strong deformation portion 210 of the support piece 200, a plurality of hollow holes 311 may be distributed on the hollow portion 310 of the reinforcing piece 300. The hollow holes 311 may also be arranged along the second direction ( Figure 9 The hole 311 extends along the first direction (as shown in the Y direction) and extends along the first direction (as shown in the Y direction). Figure 9 The perforations 311 are arranged sequentially at intervals (as shown in the X direction). This ensures that the perforations 311 are evenly distributed across the perforated portion 310, giving the perforated portion 310 high bending performance. Furthermore, the perforated portion 310 is more easily bent along the extension direction of the perforations 311 to match the deformation posture of the highly deformable portion 210 of the support piece 200, thus enabling the unfolding and folding of the foldable screen 10a.

[0148] In this design, each column of perforated holes 311 arranged at intervals along the first direction can include multiple perforated holes 311 arranged at intervals along the second direction. This ensures that the perforated portion 310 of the reinforcing sheet 300 has sufficient deformability, while preventing the perforated holes 311 from extending too far, thus avoiding breakage of the reinforcing sheet 300 at excessively long perforated holes 311 and ensuring the reliability and service life of the reinforcing sheet 300.

[0149] Furthermore, along the first direction, the perforated holes 311 in each adjacent row can be staggered. That is, the individual slotted holes 211 in each adjacent row of slotted holes 211 are staggered in position along the second direction. This arrangement results in a more uniform distribution of the perforated holes 311 within the perforated portion 310 along the second direction, preventing situations where some areas have excessively large openings while others have excessively small openings or even no openings. During deformation, the bending stress of the reinforcing sheet 300 is more evenly distributed. This leads to higher reliability and consistency of the reinforcing sheet 300.

[0150] For example, in the first direction, at every interval of a row of perforations 311, the perforations 311 at both ends of the perforated portion 310 of the reinforcing sheet 300 (in the second direction) can communicate with the end face of the reinforcing sheet 300. In this way, at every interval of a row of perforations 311, the end face of the reinforcing sheet 300 is interrupted, disrupting the integrity of the end face of the reinforcing sheet 300. This gives the end face of the reinforcing sheet 300 good bendability, ensuring the overall bending performance of the perforated portion 310 of the reinforcing sheet 300.

[0151] Figure 10 for Figure 6 A partial cross-sectional view of the foldable screen in its unfolded state. (Refer to...) Figure 10 As shown, based on this, along the first direction ( Figure 10 (As shown in the X direction), the perforated hole 311 in the reinforcing plate 300 and the strip hole 211 in the supporting plate 200 can be staggered. Thus, in the overall structure formed by the supporting plate 200 and the reinforcing plate 300, there is no completely through opening. The portion of the strip hole 211 on the supporting plate 200 is supported by the solid portion on the perforated portion 310 of the reinforcing plate 300. This provides better support for the foldable portion 102 of the foldable screen 10a as a whole, improving the impact resistance of the foldable portion 102 of the foldable screen 10a.

[0152] When the foldable electronic device 1 undergoes a drop ball impact test or a pointed impact test, the reinforcing plate 300 provides supplementary support when the ball or pointed object impacts the location of the strip hole 211 on the support plate 200. The reinforcing plate 300 can transfer and disperse the impact energy to various areas of the reinforcing plate 300, preventing stress concentration in the bendable portion 102 of the foldable screen 10a. This prevents failures such as bright spots and black spots in the bendable portion 102 of the foldable screen 10a, improving the reliability of the bendable portion 102 and enhancing the usability of the foldable screen 10a.

[0153] Figure 11 This is a partial structural diagram of a second type of foldable screen provided in an embodiment of this application. Figure 12 for Figure 11 The diagram shows the structure of the reinforcing sheet of the folding screen. Figure 13 for Figure 11 A partial exploded view of the foldable screen in the image. Figure 14 for Figure 11 A partial cross-sectional view of the foldable screen in the image.

[0154] Combination Figure 11 and Figure 12As shown, in some embodiments, the reinforcing sheet 300 can also be a solid sheet. In other words, the reinforcing sheet 300 as a whole is a solid structure. This results in higher structural strength and better support for the reinforcing sheet 300. The slotted holes 211 on the strong deformation portion 210 of the supporting sheet 200 can be flexibly designed at any position, and the reinforcing sheet 300 can provide solid support for the slotted holes 211 in all cases. The bendable portion 102 of the foldable screen 10a has stronger impact resistance.

[0155] When the foldable electronic device 1 is subjected to a drop ball impact test or a pointed impact test, when the ball or pointed object impacts the location of the strip hole 211 on the support plate 200, the reinforcing plate 300 provides supplementary support, transferring and dispersing the impact energy to the entire reinforcing plate 300, so as to avoid stress concentration in the bendable part 102 of the foldable screen 10a. This will not be elaborated further here.

[0156] Furthermore, the reinforcing sheet 300 has a solid structure, making its structure simpler. This facilitates the design and processing of the reinforcing sheet 300, improves its manufacturing efficiency, and reduces its production costs.

[0157] Compared to the reinforcing sheet 300 with a hollowed-out portion 310, the solid reinforcing sheet 300 has higher structural strength but relatively weaker bending performance. Therefore, the reinforcing sheet 300 can be thinned to reduce its structural strength and enhance its bending performance, thus meeting the requirement for flexible bending of the reinforcing sheet 300 along with the support sheet 200.

[0158] For example, the thickness of the reinforcing sheet 300 can be between 0.02mm and 0.05mm. This ensures that the thickness of the reinforcing sheet 300 is not too small, guaranteeing that a uniform thickness can be produced and ensuring its reliability. For instance, the thickness of the reinforcing sheet 300 can be 0.025mm, 0.030mm, 0.035mm, 0.040mm, 0.045mm, etc.

[0159] Since the reinforcing sheet 300 is a solid sheet, even if its overall thickness is reduced, its bending performance can be maintained. However, if the reinforcing sheet 300 is integrally bonded to the support sheet 200, it is equivalent to increasing the overall thickness of the support sheet 200, which may affect its bending performance. Therefore, in combination with... Figure 13 and Figure 14 As shown, only the two sides of the reinforcing sheet 300 can be bonded to the straight portion 220 of the support sheet 200, while the middle area of ​​the reinforcing sheet 300 corresponding to the strongly deformable portion 210 of the support sheet 200 can remain separated from the support sheet 200, and there is a gap between this part of the reinforcing sheet 300 and the support sheet 200.

[0160] At this time, the adhesive layer 400 disposed between the reinforcing sheet 300 and the supporting sheet 200 may include two parts, and the two parts of the adhesive layer 400 correspond to the straight portions 220 on both sides of the supporting sheet 200, respectively. Through these two parts of the adhesive layer 400, the two sides of the reinforcing sheet 300 are respectively bonded to the straight portions 220 on both sides of the supporting sheet 200.

[0161] In this way, the reinforcing sheet 300 can be bonded and fixed by the straight portion 220 of the supporting sheet 200, and the reinforcing sheet 300 and the straight portion 220 of the supporting sheet 200 are completely fitted together. The large bonding area between the reinforcing sheet 300 and the supporting sheet 200 ensures the bonding strength between the reinforcing sheet 300 and the supporting sheet 200, resulting in good overall integrity and high reliability of the folding screen 10a. Furthermore, the reinforcing sheet 300 and the strong deformation portion 210 of the supporting sheet 200 are separated from each other, so the reinforcing sheet 300 will not affect the bending posture of the strong deformation portion 210 of the supporting sheet 200, and can also flexibly bend along with the supporting sheet 200.

[0162] Figure 15 This is a structural diagram of a support sheet in an unfolded state, as provided in an embodiment of this application. Figure 16 for Figure 15 A schematic diagram of the structure when the support piece is in a folded state.

[0163] Reference Figure 15 and Figure 16 As shown, based on the arrangement of several strip holes 211 in the strong deformation portion 210 of the support piece 200, the design of the strong deformation portion 210 can be further refined. The strong deformation portion 210 can be divided into a regular region 210a and a gradient region 210b. Along the first direction, the regular region 210a is located in the middle region of the strong deformation portion 210, and the gradient regions 210b are located on both sides of the regular region 210a. The gradient regions 210b on both sides are adjacent to the straight portion 220 on the corresponding side. The strip holes 211 in the regular region 210a can be arranged regularly, while the strip holes 211 in the gradient region 210b can be distinguished from the strip holes 211 in the regular region 210a.

[0164] Within the regular area 210a, the strip-shaped holes 211 forming a closed shape (excluding the strip-shaped holes 211 located at both ends of the regular area 210a and connected to the end face of the support piece 200) can have a uniform extension length. In this embodiment, these strip-shaped holes 211 are defined as regular strip-shaped holes 211a. Within the gradient area 210b, for each column of strip-shaped holes 211 arranged sequentially along the first direction, each column of strip-shaped holes 211 forming a closed shape includes multiple strip-shaped holes 211 with the same extension length arranged sequentially. In this embodiment, these strip-shaped holes 211 are defined as gradient strip-shaped holes 211b. The extension length of the gradient strip-shaped holes 211b is less than the extension length of the regular strip-shaped holes 211a.

[0165] By arranging regular strip-shaped holes 211a with consistent extension lengths within the regular area 210a, the deformation capacity of the regular area 210a can be maintained consistently, which is more conducive to the bending of the regular area 210a and meets the requirement for the regular area 210a to be bent significantly along with the bendable portion 102 of the screen body 100. By arranging gradient strip-shaped holes 211b with consistent extension lengths in each column of strip-shaped holes 211 within the gradient area 210b, the deformation stress of the gradient area 210b at various points in the second direction is basically the same in each column of gradient strip-shaped holes 211b. Furthermore, by making the extension length of the gradient strip-shaped holes 211b less than the extension length of the regular strip-shaped holes 211a, it is more beneficial for the gradient strip-shaped holes 211b and the regular strip-shaped holes 211a to be staggered, and the solid parts within the gradient area 210b occupy a larger area, thereby enhancing the strength of the gradient area 210b.

[0166] The support piece 200 transitions from a regular area 210a, a gradient area 210b, to a flat section 220, achieving a gradual change from soft and relatively stiff to even stiffer. Bending stress in the regular area 210a is transferred to the gradient area 210b, reducing stress concentration when the support piece 200 switches between unfolded and folded states. The gradient area 210b better buffers and absorbs bending stress, improving the reliability and lifespan of the support piece 200. It also improves the creases in the bendable section 102 of the foldable screen 10a, enhancing its usability.

[0167] Furthermore, within the gradient zone 210b, the extension lengths of the different columns of gradient strip holes 211b arranged sequentially along the first direction can be designed differently. From the side of the gradient zone 210b closest to the regular zone 210a to the side of the gradient zone 210b furthest from the regular zone 210a (the side of the gradient zone 210b closest to the straight portion 220), the extension length of the gradient strip holes 211b gradually shortens. In this way, a gradient change from soft to hard is also achieved within the gradient zone 210b, which can better balance bending requirements and stress absorption.

[0168] The design of gradually varying lengths for the strip-shaped holes 211 on both sides of the highly deformable portion 210 of the support sheet 200 is suitable for both types of foldable screens 10a mentioned above. In other words, when the reinforcing sheet 300 has a hollow portion 310 and a solid portion 320, a support sheet 200 with a gradually varying design can be used. Even when the reinforcing sheet 300 is a solid structure, a support sheet 200 with a gradually varying design can still be used.

[0169] Furthermore, when the reinforcing sheet 300 has a hollow portion 310, similar to the gradient design of the strong deformation portion 210 of the reinforcing sheet 300, the hollow portion 310 of the reinforcing sheet 300 can also be designed with a gradient. The extension length of the hollow holes 311 on both sides of the hollow portion 310 can be shorter, and the extension length of the hollow holes 311 on both sides of the hollow portion 310 can gradually shorten in the direction from the hollow portion 310 to the solid portion 320. The support sheet 200 also achieves a gradient change from soft, relatively hard to harder from the hollow portion 310 in the middle to the solid portions 320 on both sides, which will not be elaborated here.

[0170] In addition to adding a reinforcing piece 300 on the side of the support piece 200 away from the screen body 100, the structure of the support piece 200 itself can be improved by designing and improving the strong deformation part 210 and the straight part 220 of the support piece 200, while the weak deformation part 230 of the support piece 200 can maintain the aforementioned structure.

[0171] By improving the strong deformation portion 210 and the straight portion 220 of the support piece 200, the bending performance of the support piece 200 can be maintained, ensuring that the support piece 200 will not affect the bending shape of the folding screen 10a. Furthermore, the support piece 200 can also provide stronger support for the bendable portion 102 of the screen body 100, improving the impact resistance of the bendable portion 102 of the folding screen 10a. This prevents failures such as bright spots and black spots from appearing on the folding screen 10a, improving its reliability and ensuring its performance.

[0172] Figure 17 A partial side view of a third type of foldable screen provided in an embodiment of this application. Figure 18 for Figure 17 The diagram shows a partial structural diagram of the support sheet in the foldable screen.

[0173] Reference Figure 17 As shown, the screen body 100 may only have a support piece 200 on the back of the bendable portion 102. Combined with... Figure 17 and Figure 18As shown, in one embodiment, the strong deformation portion 210 of the support sheet 200 may be provided with a plurality of first blind grooves 212 and a plurality of second blind grooves 213. Both the first blind grooves 212 and the second blind grooves 213 are recessed inward from the surface of the support sheet 200, and neither the first blind grooves 212 nor the second blind grooves 213 penetrates the two sides of the support sheet 200 in the thickness direction. The first blind grooves 212 and the second blind grooves 213 reduce the thickness of a local area of ​​the support sheet 200, thereby reducing the structural strength of the support sheet 200 and enhancing its bending performance.

[0174] The strong deformation portion 210 is more easily bent along the extension direction of the first blind groove 212 and the second blind groove 213, thus allowing each first blind groove 212 and each second blind groove 213 to extend along the second direction. In this way, the extension directions of the first blind groove 212 and the second blind groove 213 are consistent, and both extension directions match the bending direction of the bendable portion 102 of the screen body 100, so the support piece 200 can meet the basic bending requirements of the bendable portion 102.

[0175] Furthermore, each of the first blind slots 212 and each of the second blind slots 213 can be sequentially spaced along the first direction. In this way, the highly deformable portion 210 of the support piece 200 has good bendability in each region along the first direction. The overall bending performance of the highly deformable portion 210 of the support piece 200 is more balanced, and the highly deformable portion 210 of the support piece 200 can flexibly bend significantly. During the switching between the unfolded and folded states of the foldable screen 10a, the support piece 200 meets the deformation requirements of the bendable portion 102 of the foldable screen 10a.

[0176] Furthermore, in the extending direction of the first blind slot 212 and the second blind slot 213, both the first blind slot 212 and the second blind slot 213 extend to both ends of the support piece 200. That is, in the second direction, the first blind slot 212 and the second blind slot 213 penetrate the strong deformation portion 210 of the support piece 200. Thus, in the second direction, each part of the strong deformation portion 210 has good bending performance. The support piece 200 can support the screen body 100 to bend smoothly without affecting the bending posture of the screen body 100, and there is no phenomenon of lifting up the bendable portion 102 of the screen body 100. During the long-term use of the foldable screen 10a, defects such as bulges and pits can be prevented from appearing on the bendable portion 102 of the screen body 100, so as to avoid adverse phenomena such as halo and reflection on the screen body 100, and ensure the display effect of the screen body 100.

[0177] Reference Figure 18As shown, more specifically, each first blind groove 212 is formed on the surface of the support piece 200 facing the screen body 100, with the groove opening of the first blind groove 212 facing the screen body 100. Each second blind groove 213 is formed on the surface of the support piece 200 away from the screen body 100, with the groove opening of the second blind groove 213 facing away from the screen body 100. With this configuration, the space inside each first blind groove 212 can be compressed and contracted, allowing the support piece 200 to bend and protrude away from the screen body 100. At the same time, the space inside each second blind groove 213 can be expanded and opened outward, enabling the support piece 200 to bend significantly in the protruding direction. Conversely, the space inside each second blind groove 213 can also be compressed and contracted, allowing the support piece 200 to bend and protrude towards the screen body 100. At the same time, the space inside each first blind groove 212 can be expanded and opened outward, enabling the support piece 200 to bend significantly in the protruding direction.

[0178] Therefore, the highly deformable portion 210 of the support piece 200 has strong bending performance and can flexibly achieve large-scale bending. The support piece 200 can be bent significantly along with the bendable portion 102 of the screen body 100, meeting the bending requirements of the foldable screen 10a when switching between the unfolded and folded states.

[0179] Based on this, along the first direction, the first blind groove 212 and the second blind groove 213 can be alternately arranged. That is, in the thickness direction of the support piece 200, the first blind groove 212 and the second blind groove 213 are not directly opposite each other. In this way, in the first direction, the thickness uniformity of the strongly deformable part 210 of the support piece 200 is good, there are no weak points in the support piece 200, and the overall consistency and reliability of the support piece 200 are good.

[0180] When the foldable electronic device 1 undergoes a drop ball impact test or a pointed impact test, if the ball or pointed object impacts the first blind groove 212 on the support plate 200, the solid portion on the other side of the support plate 200 between the adjacent second blind groove 213 can provide supplementary support to transfer and disperse the impact energy, thus preventing stress concentration in the bendable portion 102 of the foldable screen 10a. The strong deformation portion 210 of the support plate 200 provides good support for the bendable portion 102 of the screen body 100, resulting in high impact resistance of the bendable portion 102 of the foldable screen 10a. This prevents failure problems such as bright spots and black spots in the bendable portion 102 of the foldable screen 10a, thereby improving the reliability and service life of the foldable screen 10a.

[0181] Reference Figure 17 or Figure 18As shown, the orthographic projection of the first blind groove 212 onto the plane of the support piece 200 and the orthographic projection of the second blind groove 213 onto the plane of the support piece 200 do not overlap. This avoids weak points in the strong deformation portion 210 of the support piece 200, ensuring the overall reliability of the support piece 200. During drop ball impact tests or pointed impact tests, when a small ball or pointed object impacts the first blind groove 212 on the support piece 200, the area on the other side of the support piece 200 corresponding to the first blind groove 212 is a solid part, resulting in better support of the support piece 200 and higher impact resistance of the bendable portion 102 of the foldable screen 10a.

[0182] For example, the width of the first blind slot 212 can be smaller than the width of the second blind slot 213. In this case, the space of the first blind slot 212 is smaller, while the space of the second blind slot 213 is larger. The space inside the first blind slot 212 is easier to compress and shrink, while the space inside the second blind slot 213 is easier to expand and open. This makes it easier for the support piece 200 to bend and protrude away from the screen body 100, allowing the support piece 200 to more stably wrap around the screen body 100. This is more conducive to the application of the support piece 200 in the foldable electronic device 1 with its inward-folding architecture, and better meets the needs of the application scenarios of the support piece 200. Furthermore, when the foldable screen 10a is in the unfolded state, the space inside the first blind slot 212 is smaller, the support piece 200 provides better support for the screen body 100, and has a stronger ability to withstand impacts from small balls or sharp points.

[0183] Similarly, the depth of the first blind slot 212 can be less than the depth of the second blind slot 213. This results in a smaller space for the first blind slot 212 and a larger space for the second blind slot 213, making it easier for the support piece 200 to bend and protrude away from the screen body 100. This is more beneficial for the application of the support piece 200 in the foldable electronic device 1 with an inward-folding architecture. Furthermore, the structural strength of the portion of the support piece 200 closer to the screen body 100 is higher, providing better support for the screen body 100. Further details will not be elaborated here.

[0184] Because the high-deformation portion 210 of the support sheet 200 has a double-slotted structure, there is no opening extending through its thickness direction on the support sheet 200. Therefore, the structural strength of the support sheet 200 is relatively high. In this case, the thickness of the high-deformation portion 210 of the support sheet 200 can be reduced, which is equivalent to thinning the high-deformation portion 210 of the support sheet 200. This reduces the strength of the high-deformation portion 210 of the support sheet 200, enhances the bendability of the support sheet 200, and meets the bending requirements of the folding screen 10a.

[0185] For example, the thickness of the high-deformation portion 210 of the support sheet 200 can be between 0.10 mm and 0.15 mm. This results in a very thin high-deformation portion 210, meeting the bending performance requirements. Simultaneously, the thickness of the high-deformation portion 210 is not too small, meeting the manufacturability requirements. For example, the thickness of the high-deformation portion 210 can be 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, etc.

[0186] The thickness of the flat portion 220 of the support piece 200 can be increased to meet the overall structural strength requirements of the support piece 200 and ensure its overall stability and reliability. The flat portion 220 of the support piece 200 provides stronger support to the screen body 100, which improves the overall support of the support piece 200 to the bendable portion 102 of the screen body 100. The impact resistance of the bendable portion 102 of the foldable screen 10a is also greatly improved.

[0187] For example, the thickness of the flat portion 220 of the support sheet 200 can be between 0.25mm and 0.35mm. For instance, the thickness of the flat portion 220 of the support sheet 200 can be 0.26mm, 0.27mm, 0.28mm, 0.29mm, 0.30mm, 0.31mm, 0.32mm, 0.33mm, 0.34mm, etc.

[0188] Of course, in addition to the first blind groove 212 and the second blind groove 213 arranged on the support plate 200, a reinforcing plate 300 can also be added to the surface of the support plate 200 facing away from the screen body 100. In this way, the reinforcing plate 300 and the support plate 200 work together to further enhance the support for the bendable portion 102 of the screen body 100, and significantly improve the impact resistance of the bendable portion 102 of the foldable screen 10a. Further details will not be elaborated here.

[0189] Figure 19 A partial side view of a fourth type of foldable screen provided in an embodiment of this application. Figure 20 for Figure 19 The diagram shows a partial structural diagram of the support sheet in the foldable screen.

[0190] Reference Figure 19 As shown, the screen body 100 may only have a support piece 200 on the back of the bendable portion 102. Combined with... Figure 19 and Figure 20 As shown, in another embodiment, the strong deformation portion 210 of the support piece 200 is provided with a plurality of blind grooves 214 and a plurality of first strip holes 215. Each blind groove 214 and each first strip hole 215 extends along the second direction, and the blind grooves 214 and the first strip holes 215 are arranged sequentially at intervals in the first direction.

[0191] This configuration reduces the thickness of a local area of ​​the support piece 200 by the blind slot 214 and provides a local opening for the support piece 200 by the first strip hole 215. Together, these elements reduce the structural strength of the highly deformable portion 210 of the support piece 200 and enhance its bending performance. Furthermore, the highly deformable portion 210 is easier to bend along the extension directions of the blind slot 214 and the first strip hole 215. The blind slot 214 and the first strip hole 215 extending along the second direction match the bending direction of the bendable portion 102 of the screen body 100. In addition, the blind slot 214 and the first strip hole 215, spaced apart sequentially along the first direction, ensure good bendability in all areas of the highly deformable portion 210 in the first direction. This results in a more balanced overall bending performance of the highly deformable portion 210, enabling significant bending and meeting the deformation requirements of the bendable portion 102 of the foldable screen 10a.

[0192] In the extending direction of the blind slot 214, the blind slot 214 extends to both ends of the support piece 200. That is, in the second direction, the blind slot 214 penetrates the highly deformable portion 210 of the support piece 200. In this way, in the second direction, each part of the highly deformable portion 210 has good bending performance, and the highly deformable portion 210 will not affect the bending posture of the screen body 100, ensuring that the bendable portion 102 of the screen body 100 can be bent smoothly. Furthermore, each column of first strip holes 215 arranged sequentially along the first direction includes a plurality of strip holes 211 arranged at intervals along the second direction, which ensures that the highly deformable portion 210 has sufficient deformation capacity while avoiding excessive extension length of the first strip holes 215 that would affect the reliability of the support piece 200.

[0193] Because a blind groove 214 is formed on one side surface of the highly deformable portion 210 of the support piece 200, the blind groove 214 does not penetrate through both sides of the support piece 200 in the thickness direction. Therefore, the support piece 200 needs to have a certain thickness to meet the machinability requirements of the blind groove 214, which increases the structural strength of the highly deformable portion 210 of the support piece 200. The first strip-shaped hole 215 further forms a uniformly distributed hollow structure on the highly deformable portion 210, enhancing its bending performance. The blind groove 214 and the first strip-shaped hole 215 work together to enhance the support of the highly deformable portion 210 of the support piece 200 and ensure that its bending performance meets the requirements.

[0194] Therefore, the strong deformation section 210 provides better support for the bendable section 102 of the screen, which can enhance the impact resistance of the bendable section 102 of the foldable screen 10a. When the foldable electronic device 1 is subjected to a drop ball impact test or a sharp point impact test, the support piece 200 provides support for the screen body 100, transferring and dispersing the impact energy, which can prevent failure problems such as bright spots and black spots from appearing in the bendable section 102 of the foldable screen 10a, thereby improving the reliability and service life of the foldable screen 10a.

[0195] As for the specific method of setting up blind slot 214, combined with Figure 19 and Figure 20 As shown, in some embodiments, the opening of the blind slot 214 can face the screen body 100. During the bending process of the high-deformation portion 210, it is easier to achieve the compression and shrinking of the space within each blind slot 214. At this time, the high-deformation portion 210 needs to overcome less deformation stress, making it easier to bend and resulting in higher stability after bending. By making the opening of the blind slot 214 face the screen body 100, the high-deformation portion 210 can more easily bend and protrude away from the screen body 100, which is more beneficial for the application of the support piece 200 in the foldable electronic device 1 with its inward-folding structure.

[0196] Of course, provided that the bending reliability of the high-deformation part 210 is met, the slot opening of the blind slot 214 can also face away from the screen body 100. This embodiment does not impose specific limitations on this.

[0197] Reference Figure 20 As shown, in each column of first strip-shaped holes 215 arranged along the second direction, the first strip-shaped holes 215 located at both ends of the strongly deformable portion 210 of the support piece 200 are connected to the end face of the support piece 200. In this way, both the blind slot 214 and the first strip-shaped holes 215 are connected to the end face of the strongly deformable portion 210, resulting in a higher density and better uniformity of openings on the end face of the strongly deformable portion 210. The strongly deformable portion 210 of the support piece 200 has better bending performance, enabling a greater degree of bending and meeting the bending requirements of the bendable portion 102 of the foldable screen 10a. Furthermore, the bending performance at both ends of the strongly deformable portion 210 is better matched with the bending performance of the middle region of the strongly deformable portion 210, resulting in higher overall flatness after bending, which is beneficial for improving the display effect of the foldable screen 10a.

[0198] Based on the alternating arrangement of the first strip-shaped hole 215 and the blind groove 214, a second strip-shaped hole 216 can also be provided at the bottom of the blind groove 214, and the second strip-shaped hole 216 extends along the extension direction of the blind groove 214. In this way, the opening area of ​​the strong deformation part 210 of the support piece 200 is increased, the structural strength of the strong deformation part 210 can be reduced, and it is more conducive to the large bending of the strong deformation part 210 to meet the bending requirements of the bendable part 102 of the foldable screen 10a.

[0199] In the second direction, the bottom of the blind groove 214 may be provided with multiple second strip-shaped holes 216 at intervals. This results in a more uniform distribution of the second strip-shaped holes 216 on the high-deformation portion 210, leading to a more balanced bending capacity of the high-deformation portion 210 in the second direction. Furthermore, while ensuring sufficient bending capacity for the high-deformation portion 210, the extension length of the second strip-shaped holes 216 is avoided from becoming excessive, so as not to affect the reliability of the support piece 200.

[0200] Furthermore, each of the second strip-shaped holes 216 forms a closed shape. That is, in the second direction, the second strip-shaped holes 216 located at both ends of the strongly deformable portion 210 of the support piece 200 do not extend to communicate with the end face of the support piece 200. This prevents the formation of excessive openings on the end face of the support piece 200, ensuring the structural strength of the edge area of ​​the support piece 200 and guaranteeing sufficient stability and reliability for the support piece 200 as a whole. The blind slot 214 maintains a groove-like structure. At both ends of the support piece 200, the two side walls of the blind slot 214 are connected by a solid groove bottom, which improves the overall support of the strongly deformable portion 210 and enhances the impact resistance of the bendable portion 102 of the foldable screen 10a.

[0201] Because the strong deformation portion 210 of the support sheet 200 has openings extending through its thickness direction, the structural strength of the strong deformation portion 210 is relatively low. Therefore, the thickness of the strong deformation portion 210 of the support sheet 200 can be set slightly larger to enhance its strength and, while meeting the bending requirements of the folding screen 10a, to improve its support capabilities.

[0202] For example, the thickness of the highly deformable portion 210 of the support sheet 200 can be between 0.15mm and 0.20mm. This increases the thickness of the highly deformable portion 210 of the support sheet 200, enhancing its support and improving the impact resistance of the bendable portion 102 of the foldable screen 10a. At the same time, the thickness of the highly deformable portion 210 is not excessive, so as not to affect its bending performance. For example, the thickness of the highly deformable portion 210 can be 0.16mm, 0.17mm, 0.18mm, 0.19mm, etc.

[0203] Furthermore, similar to the aforementioned double-slotted support sheet 200, the thickness of the flat portion 220 of the support sheet 200 can also be relatively increased to meet the overall structural strength requirements of the support sheet 200, and the flat portion 220 of the support sheet 200 provides higher support strength to the screen body 100. For example, the thickness of the flat portion 220 of the support sheet 200 can be between 0.25mm and 0.35mm. Further details will not be elaborated here.

[0204] Furthermore, in addition to the blind grooves 214 and the first strip-shaped holes 215 alternately arranged along the first direction on the support plate 200, a reinforcing plate 300 can also be added to the surface of the support plate 200 facing away from the screen body 100. The reinforcing plate 300 and the support plate 200 work together to further enhance the support for the bendable portion 102 of the screen body 100, significantly improving the impact resistance of the bendable portion 102 of the foldable screen 10a. Further details are omitted here.

[0205] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0206] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

Claims

1. A foldable screen, characterized in that, include: The screen body includes a first non-bendable portion, a bendable portion, and a second non-bendable portion arranged sequentially along a first direction. A support sheet is attached to the back of the screen body and at least covers the bendable portion; the support sheet includes a strong deformation portion, a straight portion and a weak deformation portion. In the first direction, the strong deformation portion is located in the middle region of the support sheet, and the straight portion and the weak deformation portion are sequentially arranged on both sides of the strong deformation portion. A reinforcing sheet is attached to the side surface of the support sheet opposite to the screen body, and both ends of the reinforcing sheet extend to the flat portion; The strong deformation portion has several strip-shaped holes, which extend along a second direction and are spaced apart sequentially along the first direction, with the second direction being perpendicular to the first direction; the weak deformation portion has multiple long grooves, which are spaced apart sequentially along the first direction, with the openings of the long grooves facing away from the screen body.

2. The foldable screen according to claim 1, characterized in that, The reinforcing sheet includes a hollow portion and a solid portion; in the first direction, the solid portion is located on both sides of the hollow portion, the hollow portion covers the strongly deformable portion, and the solid portion covers at least part of the straight portion; The hollowed-out portion has a plurality of hollow holes distributed therein. The hollow holes extend along the second direction and are arranged at intervals along the first direction. Furthermore, along the first direction, the hollow holes and the strip holes are staggered from each other.

3. The foldable screen according to claim 2, characterized in that, Along the second direction, a plurality of hollow holes are sequentially spaced on the reinforcing sheet.

4. The foldable screen according to claim 3, characterized in that, Along the first direction, adjacent perforated holes are staggered in the second direction.

5. The foldable screen according to claim 4, characterized in that, The perforated holes located at both ends of the perforated portion are connected to the end face of the reinforcing sheet at intervals along the first direction.

6. The foldable screen according to any one of claims 2-5, characterized in that, All areas of the reinforcing sheet are bonded to the supporting sheet.

7. The foldable screen according to any one of claims 2-5, characterized in that, The thickness of the reinforcing sheet is 0.05mm-0.10mm.

8. The foldable screen according to claim 1, characterized in that, The reinforcing sheet is a solid sheet.

9. The foldable screen according to claim 8, characterized in that, The reinforcing sheet is bonded to the straight portion of the supporting sheet.

10. The foldable screen according to claim 7, characterized in that, The thickness of the reinforcing sheet is 0.02mm-0.05mm.

11. The foldable screen according to claim 1, characterized in that, The strongly deformable portion includes a regular region and a gradient region, the gradient region being located on both sides of the regular region and adjacent to the straight portion; The strip holes distributed in the regular area include regular strip holes that form a closed shape and have a consistent extension length. Each column of strip holes arranged along the second direction in the gradient area includes gradient strip holes that form a closed shape and have a consistent extension length. The extension length of the gradient strip holes is less than the extension length of the regular strip holes.

12. The foldable screen according to claim 11, characterized in that, From the side of the gradient region closer to the regular region to the side of the gradient region farther from the regular region, the extension length of the gradient strip hole gradually shortens.

13. The foldable screen according to claim 1, characterized in that, The distance between the edge of the reinforcing sheet and the edge of the straight portion of the supporting sheet is less than or equal to 1.5 mm.

14. A foldable screen, characterized in that, include: The screen body includes a first non-bendable portion, a bendable portion, and a second non-bendable portion arranged sequentially along a first direction. A support sheet is attached to the back of the screen body and at least covers the bendable portion; the support sheet includes a strong deformation portion, a straight portion and a weak deformation portion. In the first direction, the strong deformation portion is located in the middle region of the support sheet, and the straight portion and the weak deformation portion are sequentially arranged on both sides of the strong deformation portion. The strong deformation section is provided with a plurality of first blind slots and a plurality of second blind slots. The first blind slots and the second blind slots extend to both ends of the strong deformation section along a second direction, which is perpendicular to the first direction. The opening of the first blind slot faces the screen body, and the opening of the second blind slot faces away from the screen body. The first blind slots and the second blind slots are alternately arranged along the first direction. The weak deformation section is provided with a plurality of long slots. The long slots are alternately arranged along the first direction, and the opening of the long slots faces away from the support plate.

15. The foldable screen according to claim 14, characterized in that, The orthographic projection of the first blind groove on the support plate does not overlap with the orthographic projection of the second blind groove on the support plate.

16. The foldable screen according to claim 14, characterized in that, The width of the first blind slot is smaller than the width of the second blind slot.

17. The foldable screen according to claim 14, characterized in that, The depth of the first blind groove is less than the depth of the second blind groove.

18. The foldable screen according to any one of claims 14-17, characterized in that, The thickness of the strongly deformed part is 0.10mm-0.15mm.

19. A foldable screen, characterized in that, include: The screen body includes a first non-bendable portion, a bendable portion, and a second non-bendable portion arranged sequentially along a first direction. A support sheet is attached to the back of the screen body and at least covers the bendable portion; the support sheet includes a strong deformation portion, a straight portion and a weak deformation portion. In the first direction, the strong deformation portion is located in the middle region of the support sheet, and the straight portion and the weak deformation portion are sequentially arranged on both sides of the strong deformation portion. The strong deformation section is provided with multiple blind grooves and several first strip holes. The blind grooves extend to both ends of the strong deformation section along a second direction, and the first strip holes extend along the second direction and are spaced apart. The second direction is perpendicular to the first direction. Furthermore, along the first direction, the blind grooves and the first strip holes are spaced apart sequentially. The weak deformation section is provided with multiple long grooves. The long grooves are spaced apart sequentially along the first direction, and the openings of the long grooves face away from the support plate.

20. The foldable screen according to claim 19, characterized in that, The first strip-shaped holes located at both ends of the strongly deformed part are connected to the end face of the support piece.

21. The foldable screen according to claim 19, characterized in that, The bottom of the blind groove is provided with a second strip-shaped hole, which extends along the second direction and is spaced apart.

22. The foldable screen according to claim 21, characterized in that, Each of the second strip holes forms a closed shape.

23. The foldable screen according to any one of claims 19-22, characterized in that, The opening of the blind slot faces the screen body.

24. The foldable screen according to any one of claims 19-22, characterized in that, The thickness of the strongly deformed part is 0.15mm-0.20mm.

25. The folding screen according to claim 14 or 19, characterized in that, The thickness of the straight section is 0.25mm-0.35mm.

26. The foldable screen according to claim 14 or 19, characterized in that, Also includes: A reinforcing sheet is attached to the side surface of the support sheet opposite to the screen body, and both ends of the reinforcing sheet extend to the flat portion.

27. A foldable electronic device, characterized in that, It includes a housing assembly and a foldable screen as described in any one of claims 1-13 or 14-26, wherein the foldable screen is mounted on the housing assembly.

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