Supporting structure, flexible display device and electronic equipment

Abstract

The invention discloses a supporting structure, a flexible display device and electronic equipment, the supporting structure comprises a flexible bending piece and a supporting piece, the supporting piece is connected with the flexible bending piece, the supporting piece comprises a transition area and a supporting area which are connected in the first direction, the transition area is connected with the flexible bending piece, the transition area is provided with a weakening part, and the weakening part is provided with a second direction. The weakening part is configured to be used for reducing the anti-bending rigidity of the transition area so that the anti-bending rigidity of the supporting structure can be gradually increased from the flexible bending piece to the transition area and the supporting area in sequence in the first direction. According to the supporting structure, the flexible display device and the electronic equipment, the situation that the bent part of the supporting structure extrudes and damages the light-emitting display layer can be avoided, meanwhile, stiffness mutation of the supporting structure at the bent part is reduced, and the die mark problem of the flexible display device is effectively solved.

Description

Technical Field

[0001] The present application relates to the field of flexible display technology, and in particular to a support structure, a flexible display device and an electronic device. Background Art

[0002] With the development of flexible display technology, flexible screens are increasingly used in electronic devices. In order to maintain the flatness and rigidity of the flexible screen, a metal plate (such as a steel plate) is usually set under the screen as a support under the screen. At the same time, in order to enable the metal plate to bend and fold, a perforation design is usually performed in the bending area of ​​the metal plate to make the bending area of ​​the metal plate soft and bendable.

[0003] However, narrow hard ribs will be formed between two adjacent through holes, resulting in mutual squeezing of the narrow hard ribs and the light-emitting display layer of the flexible screen when the electronic device is subjected to impact by falling or the user presses hard on the bending area of ​​the flexible screen. The light-emitting display layer is very weak and is easily damaged when squeezed by the narrow hard ribs, which causes the flexible screen to easily have bright spots, black spots or bright lines that affect the display. Moreover, when the flexible screen is bent, there is an obvious stiffness mutation at the connection between the position of the metal plate without a through hole and the metal plate with a through hole, which causes local shape mutations at these connections of the metal plate in the bent state, which in turn causes the occurrence of mold imprinting of the flexible screen, affecting the display quality of the flexible screen. Summary of the invention

[0004] Based on this, the embodiments of the present application provide a support structure, a flexible display device and an electronic device, which can reduce the sudden change in stiffness of the support structure at the bent part while avoiding the bent part of the support structure from squeezing and damaging the light-emitting display layer, thereby effectively improving the mold printing problem of the flexible display device.

[0005] In order to achieve the above objectives, in a first aspect, an embodiment of the present application discloses a support structure, the support structure comprising:

[0006] A flexible bending member; and

[0007] A support member, wherein the support member is connected to the flexible bending member, the support member includes a transition zone and a support zone connected along a first direction, the transition zone is connected to the flexible bending member, and the transition zone is provided with a weakening portion, the weakening portion is configured to reduce the bending stiffness of the transition zone, so that the bending stiffness of the support structure gradually increases from the flexible bending member along the first direction to the transition zone and the support zone.

[0008] In a second aspect, an embodiment of the present application discloses a flexible display device, which includes a flexible screen and a supporting structure as described in the first aspect above, wherein the flexible screen includes a bending zone and a non-bending zone connected to the bending zone, the supporting structure is arranged on one side of the flexible screen along its thickness direction, the flexible bending piece is arranged corresponding to the bending zone, and the supporting piece is arranged corresponding to the non-bending zone.

[0009] In a third aspect, an embodiment of the present application discloses an electronic device having the flexible display device as described in the second aspect above.

[0010] Compared with the prior art, the beneficial effects of this application are:

[0011] The support structure, flexible display device and electronic device provided in the embodiments of the present application adopt a support structure made of a composite of flexible and rigid materials, that is, the support structure includes a support member and a flexible bending member with an elastic modulus smaller than that of the support member, and a weakening portion is provided on the transition zone where the support member and the flexible bending member are connected to reduce the bending stiffness of the transition zone. Therefore, when the support structure is applied to the flexible display device, on the one hand, the support structure can maintain the function of bending along with the flexible screen of the flexible display device by virtue of the low modulus and stretchable characteristics of the flexible bending member, without the need to open a hole in the bending portion of the support structure, thereby canceling the design of opening a hole in the bending portion of the support structure. In this way, the formation of thin and narrow hard ribs in the bending portion of the support structure can be avoided, thereby reducing the risk of squeezing and damaging the light-emitting display layer of the flexible screen. On the other hand, the setting of the weakening part can make the bending stiffness of the supporting structure gradually increase from the flexible bending part to the transition zone and the supporting zone in sequence, which can effectively alleviate the sudden change in the bending stiffness between the flexible bending part and the supporting part, so that the bending stiffness of the supporting structure can achieve a smooth transition between the flexible bending part and the supporting part, thereby effectively improving the problem of mold imprinting on the flexible screen caused by deformation caused by the sudden change in the local bending stiffness of the supporting structure.

[0012] In addition, since the flexible bending part has certain elasticity, cushioning and supporting properties, it can further protect the luminous display from the back, and also enable the flexible bending part to more gently cover the flexible screen inside it, avoiding severe squeezing of the flexible screen, so as to prevent all film materials in the flexible screen from being subjected to severe squeezing force, and reduce the risk of adhesive material dislocation and force, which is beneficial to ensure the structural integrity and normal use function of the flexible screen and increase the service life of the flexible screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 is a schematic diagram of a laminated structure of a flexible screen in the related art;

[0015] Figure 2 It is a schematic diagram of a flexible screen in the related art being bent to form a water drop-shaped flexible screen;

[0016] Figure 3 It is a schematic diagram of a support plate in the related art in which through holes are respectively provided at positions corresponding to the inner bending area and the outer bending area;

[0017] Figure 4 yes Figure 3 A local enlarged view of the M in FIG.

[0018] Figure 5 It is a schematic diagram of the light-emitting display layer of the flexible screen in the related art being squeezed and deformed by the hard ribs;

[0019] Figure 6 It is a schematic diagram of a flexible screen producing a mold print in the related art;

[0020] Figure 7 It is a structural schematic diagram of the electronic device disclosed in the embodiment of the present application when it is in an unfolded state;

[0021] Figure 8 A schematic diagram of the structure of the electronic device disclosed in the embodiment of the present application when in a folded state;

[0022] Fig. 9 This is a schematic structural diagram of a flexible screen disclosed in an embodiment of the present application when it is a folding screen and is in an unfolded state;

[0023] Fig.10 This is a schematic diagram of the structure of the flexible screen disclosed in the embodiment of the present application when it is in a folded state;

[0024] Fig.11 is a schematic diagram of the flexible screen disclosed in the embodiment of the present application being bent to form a water drop-shaped flexible screen;

[0025] Fig.12 is a schematic diagram of the flexible screen disclosed in the embodiment of the present application being bent to form a U-shaped flexible screen;

[0026] Fig.13 This is a schematic structural diagram of a flexible screen disclosed in an embodiment of the present application when it is a scroll screen and is in an unfolded state;

[0027] Fig.14 This is a schematic diagram of the structure of the flexible screen disclosed in the embodiment of the present application when it is in a rolled-up state;

[0028] Fig.15 A schematic diagram of the exploded structure of the flexible display device disclosed in the embodiment of the present application;

[0029] Fig.16 A schematic diagram of the structure of the support structure disclosed in the embodiment of the present application;

[0030] Fig.17 The supporting structure disclosed in the embodiment of the present application is along Fig.16 The first cross-sectional view in the AA direction;

[0031] Fig.18 The supporting structure disclosed in the embodiment of the present application is along Fig.16 The second cross-sectional view in the AA direction;

[0032] Fig.19 The supporting structure disclosed in the embodiment of the present application is along Fig.16 The third cross-sectional view in the AA direction;

[0033] Fig. 20 The supporting structure disclosed in the embodiment of the present application is along Fig.16 The fourth cross-sectional view in the AA direction;

[0034] Fig.21 The supporting structure disclosed in the embodiment of the present application is along Fig.16 The fifth cross-sectional view in the AA direction;

[0035] Fig. 22 The supporting structure disclosed in the embodiment of the present application is along Fig.16 The sixth cross-sectional view in the AA direction;

[0036] Fig.23 The supporting structure disclosed in the embodiment of the present application is along Fig.16 The seventh cross-sectional view in the AA direction;

[0037] Fig.24 The supporting structure disclosed in the embodiment of the present application is along Fig.16 The eighth cross-sectional view in the AA direction;

[0038] Fig.25 The supporting structure disclosed in the embodiment of the present application is along Fig.16 The ninth cross-sectional view in the AA direction;

[0039] Fig.26 The supporting structure disclosed in the embodiment of the present application is along Fig.16 The tenth cross-sectional view in the AA direction;

[0040] Fig. 27 yes Fig.16 The first local enlarged view at N in FIG.

[0041] Fig.28 yes Fig.16 The second local enlarged view at N in FIG.

[0042] Fig.29 yes Fig.16 The third local enlarged view at N in FIG.

[0043] Fig.30 yes Fig.16 The fourth local enlarged view at N in FIG.

[0044] Fig.31 yes Fig.16 The fifth local enlarged view at N in FIG.

[0045] Fig.32 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The first cross-sectional view in the BB direction;

[0046] Fig.33 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The second cross-sectional view in the BB direction;

[0047] Fig.34 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The third cross-sectional view in the BB direction;

[0048] Fig.35 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The fourth cross-sectional view in the BB direction;

[0049] Fig.36 yes Fig.35 Schematic diagram of the decomposition of

[0050] Fig.37 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The fifth cross-sectional view in the BB direction;

[0051] Fig.38 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The sixth cross-sectional view in the BB direction;

[0052] Fig.39 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The seventh cross-sectional view in the BB direction;

[0053] Fig.40 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The eighth cross-sectional view in the BB direction;

[0054] Fig.41 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The ninth cross-sectional view in the BB direction;

[0055] Fig.42 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The tenth cross-sectional view in the BB direction;

[0056] Fig.43 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The eleventh cross-sectional view in the BB direction;

[0057] Fig.44 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The twelfth cross-sectional view in the BB direction;

[0058] Fig.45 yes Fig.44 Exploded diagram of

[0059] Fig.46 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The thirteenth cross-sectional view in the BB direction;

[0060] Fig.47 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The fourteenth cross-sectional view in the BB direction;

[0061] Fig.48 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The fifteenth cross-sectional view in the BB direction;

[0062] Fig.49 yes Fig.48 Exploded diagram of

[0063] Fig.50 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The sixteenth cross-sectional view in the BB direction;

[0064] Fig.51 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The seventeenth cross-sectional view in the BB direction;

[0065] Fig.52 The supporting structure disclosed in the embodiment of the present application is along Fig.31 The eighteenth sectional view in the BB direction.

[0066] Description of main reference numerals

[0067] 100- electronic equipment;

[0068] 10-flexible display device; 11-flexible screen; 111-bending area; 112-non-bending area; 12-support structure; 121-flexible bending member; 1211-bending portion; 1212-extending portion; 1212a-first portion; 1212b-first sub-portion; 1212c-second sub-portion; 1212d-second portion; 1212e-second inclined surface; 1213-second step; 1213a-second step surface; 1213b-second side surface; 122-support member; 122a-first sub-support member; 122b-second sub-support member; 12 21-transition zone; 1221a-weakening portion; 1221b-transition portion; 1221c-weakening space; 1221d-opening; 1221e-third side; 1221f-first end surface; 1221g-first inclined surface; 1221h-first side edge; 1221i-second side edge; 1222-supporting area; 1223-first step; 1223a-first step surface; 1223b-sub-step surface; 1223c-first end step surface; 1223d-end step surface; 1223e-first side; 123-avoidance space; 124-flexible layer;

[0069] 20- Equipment housing;

[0070] O-axis; f1-first direction; f2-thickness direction; f3-second direction. DETAILED DESCRIPTION

[0071] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0072] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0073] It is understood that the terms "first", "second", etc. used in this application can be used to describe various elements in this article, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, the first sub-support member can be referred to as the second sub-support member, and similarly, the second sub-support member can be referred to as the first sub-support member. Both the first sub-support member and the second sub-support member are sub-support members, but they are not the same sub-support member.

[0074] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0075] When used herein, the singular forms of "a", "an" and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the existence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the existence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof. At the same time, the term "and / or" used in this specification is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone. That is, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0076] Currently, mobile phones with flexible displays, such as folding phones and roll-up phones, have the advantage that when unfolded, they are larger, similar to the display size of a tablet, and when folded or rolled up, they are the size of an ordinary mobile phone.

[0077] like Figure 1 As shown, Figure 1The laminated structure of the flexible screen in the related art is shown, and the laminated structure includes a protective layer, a first optical glue, an ultra-thin glass, a second optical glue, a polarizer, a third optical glue, a light-emitting display layer, a first double-sided adhesive, a display layer substrate, a second double-sided adhesive, and a support plate, which are stacked in sequence from top to bottom. Among them, the protective layer is mainly used to protect the ultra-thin glass from scratches, and the material of the protective layer may include but is not limited to PET (polyethylene glycolterephthalate), TAC (Triacetyl Cellulose), etc. The ultra-thin glass (Ultra-Thin Glass, referred to as UTG) is mainly used as a protective layer for the light-emitting display layer, and at the same time provides a certain stiffness to the flexible screen and improves the optical flatness of the surface. The polarizer is used to achieve anti-glare for the light-emitting display layer, and the display layer substrate is used to protect the light-emitting display layer. The second double-sided adhesive is used to bond the support plate to the display layer substrate, thereby supporting the light-emitting display layer to give it a certain rigidity, so that the appearance of the flexible screen is smooth.

[0078] In the related art, in order to enable the support plate to bend and fold, a through hole is usually locally provided at the bending position of the support plate corresponding to the flexible screen, so that the bending area of ​​the support plate becomes soft and can bend, so that the support plate can bend along with the flexible screen when it bends.

[0079] For example, the flexible screen can be folded in a teardrop shape. Figure 2 , Figure 3 As shown, Figure 2 The water drop folding screen is shown in Figure 3 FIG. 1 shows a schematic diagram of the support plate in an unfolded state. Figure 2 It can be seen that the water drop folding screen has an inner bending area a, an outer bending area b, and a transitional connection area c connecting the inner bending area a and the outer bending area b. The inner bending area a is the area that bends inward (i.e., the center of the inner bending area a is located between the two folded screens), and the outer bending area b is the area that bends outward (i.e., the center of the outer bending area b is located outside the two folded screens). That is, the bending direction of the inner bending area a is opposite to the bending direction of the outer bending area b (e.g., Figure 2 inward and outward directions as shown in ).

[0080] Furthermore, both the inner bending area a and the outer bending area b need to be bent. In the related art, the support plate is often provided with through holes d and e at positions corresponding to the inner bending area a and the outer bending area b, respectively, so as to reduce the stiffness of the support plate corresponding to the inner bending area a and the outer bending area b, so that the inner bending area a and the outer bending area b are easy to bend.

[0081] Among them, the through hole d can not only greatly reduce the support plate so that it can be folded, such as Figure 2 As shown, after folding, the through hole d will be opened. Generally, the total length of the position of the support plate corresponding to the inner bending area a after bending is L1, and the total length of the position of the support plate corresponding to the inner bending area a in the unfolded state is L2 (as shown in FIG. Figure 3 As shown in the figure, it will be stretched and enlarged by 0.5mm-1.0mm. With the setting of this through hole d, the position of the support plate corresponding to the inner bending area a can effectively reduce the relative displacement of the support plate and the screen stack (luminous display layer, polarizer, protective layer, etc.) on it due to the different bending radii, and reduce the risk of tearing and delamination of the first double-sided adhesive tape and the second double-sided adhesive tape due to displacement and pulling.

[0082] However, the inventors found that Figure 4 As shown in FIG. 1 , a narrow hard rib f is formed between two adjacent through holes d, resulting in the entire device being subjected to a drop impact, or the user pressing the inner curved area a of the flexible screen with force, such as Figure 5 As shown in the figure, the narrow hard ribs will squeeze the light-emitting display layer of the flexible screen, and the light-emitting display layer is very weak and is easily damaged when squeezed by the narrow hard ribs, resulting in bright spots, black spots or bright lines on the flexible screen that affect the display. For example, Figure 6 As shown, Figure 6 The dotted box in the figure shows that the light-emitting display layer is damaged due to squeezing on the flexible screen, which leads to black spots and bright lines on the flexible screen. Moreover, when the flexible screen is bent, there is an obvious stiffness mutation at the connection between the position of the support plate without through holes and the support plate with through holes, which makes it easy for these connections of the support plate to undergo local shape mutations in the bent state, which in turn leads to the occurrence of mold imprinting of the flexible screen, affecting the display quality of the flexible screen.

[0083] Based on this, an embodiment of the present application discloses a support structure, which is intended to avoid the flexible screen being squeezed and damaged by the bent part of the support structure, and to form a gradual transition of stiffness at the junction of the inner bending area and the transition connection area, and the transition connection area and the outer bending area, without a sudden change in local stiffness, thereby reducing the probability of mold printing problems on the flexible screen.

[0084] The technical solution of the present application will be further described in detail below with reference to the accompanying drawings.

[0085] See also Figure 7 and Figure 8 , Figure 7 is a schematic diagram of the structure of an electronic device in the present application from a side perspective in one implementation mode, Figure 8It is a structural schematic diagram of a side perspective of the electronic device of the present application in another implementation method. An embodiment of the present application provides an electronic device, and the electronic device 100 can also be referred to as a mobile device, a terminal device or a terminal. The electronic device 100 can achieve folding and bending effects, and includes a flexible display device 10 and a device housing 20, the flexible display device 10 is fixed on the device housing 20, and the display side of the flexible display device 10 can be set away from the device housing 20. Among them, the flexible display device 10 is used to realize the screen display function of the electronic device 100 of the present application. The device housing 20 is used to support, fix and protect the flexible display device 10, so that the flexible display device 10 fixed on the device housing 20 can normally realize its screen display function, and the device housing 20 can be used to install various electronic devices required for the electronic device 100.

[0086] At the same time, the device housing 20 can also fix and protect the flexible display device 10 and other electronic devices or structures disposed inside the device housing 20 under the action of external forces, such as falling, knocking, and collision. It can also form a sealing effect for the flexible display device 10 and other electronic devices or structures disposed inside the device housing 20 to prevent external impurities such as water vapor and dust from corroding the electronic devices or structures disposed inside the device housing 20.

[0087] It should be noted that, in the implementation of the present application, the electronic device 100 is only introduced as a smart phone as an example, and the electronic device 100 of the present application is not limited to being a smart phone. In other implementations of the present application, the electronic device 100 can also be a laptop, a tablet computer, a car computer, a television, a smart wearable device (such as a smart watch, a smart wristband, smart glasses, ear phones, etc.), a personal digital assistant (PDA), an e-book reader or other electronic products with a display function, and the present application does not make specific limitations on this.

[0088] In the present application, since the device housing is generally directly exposed to the external environment, the material of the device housing can have certain properties such as wear resistance, corrosion resistance and scratch resistance, or a layer of functional material for wear resistance, corrosion resistance and scratch resistance can be coated on the outer surface of the device housing (that is, the outer surface of the electronic device).

[0089] The flexible display device 10 provided in the embodiment of the present application can be bent, so that it can be folded or rolled up, and thus can realize the folding or rolling design of the electronic device 100 while realizing the normal function of the electronic device 100, so as to improve the user experience when using the electronic device 100 of the present application, and improve the convenience of carrying the electronic device 100 of the present application.

[0090] See also Fig. 9 , Fig. 9 An exemplary flexible display device in an unfolded state provided in an embodiment of the present application is shown. The flexible display device 10 provided in an embodiment of the present application includes a flexible screen 11 and a supporting structure 12.

[0091] The flexible screen 11 in the present application is mainly used to realize functions such as screen display of the flexible display device 10; and the flexible screen 11 can be a folding screen or a scroll screen, that is, the flexible screen 11 may include a bending area 111 and a non-bending area 112 connected to the bending area 111, and the bending area 111 can be bent so that it can be folded or rolled up, thereby realizing the folding or winding design of the flexible screen 11.

[0092] Optionally, the flexible screen 11 can be but not limited to a liquid crystal display (LCD) or an organic light-emitting diode display (OLED), or other flexible screens that can be used to realize the screen display function of the flexible display device 10. The implementation method of this application does not make specific limitations on this.

[0093] The support structure 12 in the present application is arranged on one side of the flexible screen 11 along its thickness direction, and is located on the non-display side of the flexible screen 11. The support structure 12 can be folded or rolled up as the flexible screen 11 bends when the flexible screen 11 is folded or rolled up. It is mainly used to support the flexible screen 11 to maintain the flatness of the flexible screen 11 after folding and unfolding, or the flatness after rolling and unfolding, and to prevent the flexible screen 11 from being deformed due to insufficient strength.

[0094] See also Fig. 9 and Fig.10 , Fig.10 FIG. 1 shows an exemplary flexible display device in a folded state provided in an embodiment of the present application. The flexible screen 11 of the flexible display device 10 provided in an embodiment of the present application may be a folding screen, that is, the flexible screen 11 can be folded, so that it can be in an unfolded state (such as Fig. 9 The flexible display device 10 is in the state shown) and the folded state (as shown Fig.10 The flexible display device 10 is switched between the states shown in FIG.

[0095] When the flexible screen 11 is a folding screen, the number of the bending areas 111 is one less than the number of the non-bending areas 112, and the bending areas 111 and the non-bending areas 112 are arranged alternately, and the number of the bending areas 111 can be adjusted. Fig. 9 and Fig.10 The flexible screen 11 is taken as an example in which the number of bending areas 111 is one and the number of non-bending areas 112 is two. In other implementations of the present application, the number of bending areas 111 can also be multiple, such as two, three, etc., that is, the flexible screen 11 can also achieve double-fold, triple-fold, and other effects.

[0096] It can be understood that when the flexible screen 11 is a folding screen, the folding screen can be roughly divided into folding modes such as inward folding and outward folding. For the folding screen in the inward folding mode, after folding, the display surfaces of the flexible screen 11 are close to each other along the folding area. For the folding screen in the outward folding mode, after folding, the display surfaces of the flexible screen 11 are separated from each other along the folding area.

[0097] See also Fig. 9 and Fig.10 The bending area 111 of the flexible screen 11 in the present application has an axis O, and the foldable flexible screen 11 can be folded along the axis O, so that the flexible screen 11 can be switched between the unfolded state and the folded state, and in this case, the axis O can be regarded as the bending center axis of the bending area 111. It should be noted that Fig. 9 The position, structure and area size of the bending zone 111 and the bending center axis of the flexible screen 11 are only exemplified, and do not represent the actual position, structure and area size of the bending zone 111 and the bending center axis when the flexible screen 11 is bent. In other words, during the bending process of the flexible screen 11, the actual position, structure and area size of the bending zone 111 and the bending center axis can be adjusted according to actual needs.

[0098] Optionally, the shape of the flexible screen 11 in the unfolded state may be a rectangle, an oval, a square or a circle, etc. Of course, in other embodiments, the shape of the flexible screen 11 in the unfolded state may also be other shapes, such as a waist shape. Among them, the shape of the flexible screen 11 in the unfolded state can be determined according to actual conditions and is not specifically limited in this application.

[0099] For example, Fig.11As shown, the flexible display device 10 can be in a teardrop shape after being folded. In this case, the bending area 111 of the flexible screen 11 includes an inner bending area a, an outer bending area b, and a transitional connection area c connected between the inner bending area a and the outer bending area b. The inner bending area a is an area that bends inward (i.e., the center of the inner bending area a is located between the two flexible screen parts after folding), and the outer bending area b is an area that bends outward (i.e., the center of the outer bending area b is located outside the two flexible screen parts after folding). That is, the bending direction of the inner bending area a is opposite to the bending direction of the outer bending area b (e.g., the inner bending area a is located between the two flexible screen parts after folding). Fig.11 inward and outward directions as shown in ). or Fig.12 As shown, the flexible display device 10 can be U-shaped after being folded. In this case, the bending area 111 of the flexible screen 11 only has an inner bending area a, and there is no outer bending area b.

[0100] Further, when the flexible display device 10 is in a folded state, the folding angle of the flexible display device 10 can be understood as approximately 0°, and when the flexible display device 10 is in an unfolded state, the folding angle of the flexible display device 10 can be understood as approximately 180°. It should be noted that when the flexible display device 10 is in a folded state, the folding angle of the flexible display device 10 can be 10°, 20°, 30°, 40°, 45°, 50°, 60°, 70°, 75°, 90°, 100°, 105°, 120°, 135°, 140°, 150°, 160°, 170° or 175° in addition to the above-mentioned 0°.

[0101] See also Fig.13 and Fig.14 , Fig.13 Another exemplary flexible display device in an unfolded state provided by an embodiment of the present application is shown. Fig.14 It shows another exemplary flexible display device in a rolled-up state provided in an embodiment of the present application. The flexible screen 11 of the flexible display device 10 can be a scroll screen, that is, a part of the flexible screen 11 of the flexible display device 10 (that is, the bending area 111) can be rolled up, so that it can be in an unfolded state (such as Fig.13 The flexible display device 10 is in the state shown) and the rolled state (as shown Fig.14 The flexible display device 10 is switched between the states shown in FIG.

[0102] From the above description, it can be seen that the flexible display device 10 can have different states, such as an unfolded state and a folded state, or an unfolded state and a rolled state. When the flexible display device 10 is in the unfolded state, the flexible display device 10 can have a larger screen size for easy display and viewing, and when the flexible display device 10 is in the folded state or the rolled state, the overall volume of the flexible display device 10 is relatively small and easy to carry.

[0103] See also Fig.14 , Fig.15 and Fig.16 , Fig.15 An exemplary flexible display device provided by an embodiment of the present application and in which a flexible screen and a supporting structure are separately arranged is shown. Fig.16 An exemplary support structure in an unfolded state provided by an embodiment of the present application is shown, wherein the support structure 12 in the present application includes a flexible bending member 121 and a support member 122, wherein the support member 122 is connected to the flexible bending member 121, wherein the support member 122 and the flexible bending member 121 can be used to adhere to the bottom surface of the flexible screen 11, for example, the support member 122 and the flexible bending member 121 can be adhered to the bottom surface of the flexible screen 11 by an adhesive layer.

[0104] Optionally, the elastic modulus of the flexible bending member 121 in the present application is smaller than that of the supporting member 122, and the flexible bending member 121 is arranged corresponding to the bending area 111 of the flexible screen 11, so that when the bending area 111 of the flexible screen 11 is bent, it can bend along with the bending area 111 of the flexible screen 11, so as to realize the foldable design or the rollable design of the flexible display device 10. The supporting member 122 is arranged corresponding to the non-bending area 112 of the flexible screen 11, so as to support the non-bending area 112 of the flexible screen 11, so as to enhance the structural strength of the non-bending area 112 of the flexible screen 11, and prevent the non-bending area 112 of the flexible screen 11 from being deformed, and then when the flexible screen 11 is in the unfolded state, the flatness and reliability of the flexible screen 11 are ensured by the rigidity of the supporting member 122.

[0105] By adopting the support structure 12 provided in the implementation of the present application, when the support structure 12 is attached to the bottom surface of the flexible screen 11, the support member 122 can support the non-bending area 112 of the flexible screen 11, and the flexible bending member 121 can support the bending area 111 of the flexible screen 11, thereby avoiding the problem of poor flatness of the bending area 111 of the flexible screen 11 in the unfolded state due to lack of support. That is, all areas of the entire flexible screen 11 are supported and flattened in the unfolded state, thereby improving the flatness of the flexible screen 11 in the unfolded state.

[0106] Since the elastic modulus of the flexible bending member 121 is smaller than the elastic modulus of the supporting member 122, the flexible bending member 121 has a low modulus and is stretchable. Therefore, by virtue of the low modulus and stretchable characteristics of the flexible bending member 121, the supporting structure 12 can maintain the function of bending along with the flexible screen 11 of the flexible display device 10, without the need to provide a through hole in the bending portion of the supporting structure 12 (i.e., the flexible bending member 121). The design of providing a through hole in the bending portion of the supporting structure 12 is eliminated, thereby avoiding the formation of thin and narrow hard ribs in the bending portion of the supporting structure 12, thereby avoiding the risk of squeezing and damaging the light-emitting display layer of the flexible screen 11.

[0107] Moreover, compared with the method of directly filling the through-holes of the hard support plate in the related art with flexible materials, that is, directly filling the through-holes of the hard support plate with flexible materials, Figure 4 The method of filling the through-hole of the hard support plate with flexible material shown in the figure still has narrow hard ribs f in this method. Even when the flexible material is filled into the through-hole, a layer of flexible material is formed on the surface of the hard support plate facing the flexible screen 11, covering the narrow hard ribs f. However, there is still a risk of puncturing the flexible material layer. This is because the inventor has found through research that the narrow hard ribs f have a very small width b1 in the first direction f1, generally 0.05mm-0.3mm, which is relatively sharp and easy to puncture the flexible material layer, thereby damaging the flexible screen 11. That is, even in the method of filling the through-hole on the hard support plate with flexible material, there is still a risk of damaging the flexible screen when the hard support plate is bent. Based on this, the support structure 12 provided by the present application is adopted. Since the design of setting the through-hole in the bent part of the support structure 12 is cancelled, narrow hard ribs will not be formed in the bent part of the support structure 12, thereby more effectively avoiding the risk of squeezing and damaging the light-emitting display layer of the flexible screen 11.

[0108] In addition, since the flexible bending piece 121 has certain elasticity, cushioning and supporting properties, it can further protect the flexible screen 11 from the back, and also enable the flexible bending piece 121 to more gently cover the flexible screen 11 inside it, avoiding severe squeezing of the flexible screen 11, so as to prevent all film materials in the flexible screen 11 from being subjected to severe squeezing force, and reduce the risk of adhesive material dislocation and force, which is beneficial to ensuring the structural integrity and normal use function of the flexible screen 11 and improving the service life of the flexible screen 11.

[0109] It can be understood that when the support structure 12 in the present application is applied to a teardrop-shaped folding screen, the flexible screen 11 includes a bending area 111 and two non-bending areas 112, wherein the bending area 111 is connected between the two non-bending areas 112, and the bending area 111 includes an inner bending area, two transition connection areas and two outer bending areas, the inner bending area is connected between the two transition connection areas, one of the outer bending areas is connected to the side of one of the transition connection areas away from the inner bending area, and the other outer bending area is connected to the side of the other transition connection area away from the inner bending area. Moreover, the outer bending area can be provided with through holes and / or blind holes as required, or no through holes and / or blind holes are provided. When through holes and / or blind holes are provided in the outer bending area, the rigidity of the outer bending area can be reduced so that it can be bent.

[0110] Exemplarily, the flexible bending member 121 can be set corresponding to the inner bending area. In this case, the support member 122 includes a first sub-support member 122a and a second sub-support member 122b. The first sub-support member 122a and the second sub-support member 122b respectively correspond to the transition connection areas on both sides of the inner bending area.

[0111] In another exemplary embodiment, the flexible bending member 121 can be set corresponding to the outer bending area. In this case, the support member 122 also includes a first sub-support member 122a and a second sub-support member 122b. The first sub-support member 122a and the second sub-support member 122b correspond to the transition zone and the non-bending zone 112 on both sides of the outer bending area respectively.

[0112] When the support structure 12 in the present application is applied to a U-shaped folding screen, the flexible screen 11 also includes a bending area 111 and two non-bending areas 112, wherein the bending area 111 is connected between the two non-bending areas 112, and the flexible bending member 121 is arranged corresponding to the bending area 111, and the support member 122 includes a first sub-support member 122a and a second sub-support member 122b, and the first sub-support member 122a and the second sub-support member 122b respectively correspond to the non-bending areas 112 on both sides of the bending area 111.

[0113] See also Fig.16 and Fig.17 , Fig.17An exemplary embodiment of the present application is shown in which the thickness of the flexible bending member is smaller than the thickness of the transition zone to form a support structure for avoiding the rotating shaft. The support member 122 provided in the embodiment of the present application includes a transition zone 1221 and a support zone 1222 connected along a first direction f1. The transition zone 1221 is connected to the flexible bending member 121, and a weakening portion 1221a is provided on the transition zone 1221. The weakening portion 1221a is configured to reduce the bending stiffness of the transition zone 1221 so that the bending stiffness of the support structure 12 gradually increases from the flexible bending member 121 to the transition zone 1221 and the support zone 1222. This can effectively alleviate the sudden change in the bending stiffness between the flexible bending part 121 and the support part 122, and form a gradual transition in the bending stiffness at the junction of the flexible bending part 121 and the support part 122, without a local sudden change in the design, so that the bending stiffness of the support structure 12 can achieve a smooth transition between the flexible bending part 121 and the support part 122, thereby effectively improving the problem of mold imprinting on the flexible screen caused by deformation caused by the sudden change in the local bending stiffness of the support structure 12, and reducing the probability of mold imprinting on the flexible screen.

[0114] In the present application, for the sake of convenience of description, the thickness directions of the flexible bending member, transition zone, support zone and support member are all recorded as thickness direction f2, and in the embodiment of the present application, the first direction f1 is configured as the direction from the flexible bending member 121 to the support member 122, and the direction that is perpendicular to both the first direction f1 and the thickness direction f2 is configured as the second direction f3.

[0115] Optionally, the support member 122 may adopt a high-modulus rigid support plate, such as a metal support plate (e.g., a steel plate) or a carbon fiber support plate, to ensure the structural strength of the support member 122, so as to support the non-bending area 112 of the flexible screen 11, so as to enhance the structural strength of the non-bending area 112 of the flexible screen 11, prevent the non-bending area 112 of the flexible screen 11 from deformation, and maintain the flatness and bending stiffness of the flexible screen 11.

[0116] Exemplarily, the elastic modulus of the support member 122 is ≥80 GPa, for example 80 GPa, 85 GPa, 90 GPa, 95 GPa, 95 GPa, 100 GPa, 120 GPa, 150 GPa, etc., to ensure the structural strength of the support member 122, so as to support the non-bending area 112 of the flexible screen 11, so as to enhance the structural strength of the non-bending area 112 of the flexible screen 11, prevent the non-bending area 112 of the flexible screen 11 from deformation, and maintain the flatness and bending stiffness of the flexible screen 11.

[0117] Optionally, the material of the flexible bending member 121 can be a low modulus organic polymer material (i.e., a flexible polymer material), such as thermoplastic polyurethane (TPU), polyethylene glycolterephthalate (PET), thermosetting polyimide (PI), resin, etc., so that the flexible bending member 121 can have good bendability. For example, when the material of the flexible bending member 121 is thermoplastic polyurethane (TPU), it has the characteristics of low modulus and high resilience, so that the flexible bending member 121 can be stretched when folded, reducing the displacement between the laminated structure of the flexible bending member 121 and the flexible screen 11, and reducing the risk of display failure caused by the displacement and pulling of the adhesive layer between the flexible bending member 121 and the flexible screen 11.

[0118] Exemplarily, the elastic modulus of the flexible bending member 121 is 10MPa-10GPa, such as 10MPa, 30MPa, 50MPa, 100MPa, 200MPa, 500MPa, 1GPa, 2GPa, 5GPa, 8GPa or 10GPa, etc., so as to avoid the flexible bending member 121 being too soft while ensuring that the flexible bending member 121 has good bendability, so that the flexible bending member 121 can better support the bending area 111 of the flexible screen 11, and at the same time, when the support member 122 of the present application is used to support the flexible screen 11, the flexible bending member 121 is reduced from being punctured by the protrusion of the rotating shaft of the electronic device and causing damage to the flexible screen 11, thereby better protecting the bending area 111 of the flexible screen 11.

[0119] In the present application, printing, printing or spraying can be used to achieve the connection between the flexible bending member 121 and the transition zone 1221. The material of the flexible bending member 121 is an organic polymer material, which can be compositely connected with the transition zone 1221 in a liquid or viscous state by printing, printing, scraping or injection molding, and then heat-cured, light-cured or moisture-cured to fix the two together.

[0120] Furthermore, during the manufacturing process, the flexible bending piece 121 and the transition zone 1221 may be connected together before the transition zone 1221 is bonded to the non-bending zone 112 of the flexible screen 11, and then the flexible bending piece 121, the transition zone 1221 and the flexible screen 11 may be bonded; or after the transition zone 1221 is bonded to the non-bending zone 112 of the flexible screen 11, a process such as printing or printing of liquid or viscous organic polymer material may be performed from the bottom surface of the flexible screen 11 to form a flexible bending piece 121 connected to the bending zone 111 and the transition zone 1221 of the flexible screen 11.

[0121] When the support structure in the present application is used to support a foldable flexible screen, a rotating shaft is arranged below the support structure 12 away from the flexible screen, so that the foldable design of the flexible screen can be realized through the rotating shaft. Specifically, the flexible screen 11 has two non-bending areas 112 and a bending area 111 connected between the two non-bending areas 112, and the support member 122 includes a first sub-support member 122a and a second sub-support member 122b, the first sub-support member 122a is arranged corresponding to one of the non-bending areas 112, and the second sub-support member 122b is arranged corresponding to the other non-bending area 112, and the flexible bending member 121 is connected between the first sub-support member 122a and the second sub-support member 122b, and is arranged corresponding to the bending area 111, and usually, the flexible bending member 121 is also arranged corresponding to the rotating shaft.

[0122] Based on this, Fig.17 As shown, the thickness h1 of the flexible bending member 121 in the present application is smaller than the thickness h2 of any transition zone 1221, so as to form an avoidance space 123 between the transition zone 1221 of the first sub-support member 122a, the transition zone 1221 of the second sub-support member 122b and the surface of the flexible bending member 121 facing away from the flexible screen, so as to utilize the avoidance space 123 to avoid the rotating shaft, thereby reserving more space for the rotating shaft.

[0123] Optionally, the difference in thickness between the transition zone 1221 and the flexible bending member 121 is 0.05mm-0.1mm, that is, h2-h1=0.05mm-0.1mm, such as 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm or 0.1mm, etc. By limiting the numerical range of the difference in thickness between the transition zone 1221 and the flexible bending member 121, more space can be reserved for the shaft while preventing the thickness h1 of the flexible bending member 121 from being too thin, so as to ensure the support and protection of the flexible bending member 121 on the bending zone 111.

[0124] As a first optional implementation, Fig.17 As shown, the transition zone 1221 and the support zone 1222 are separately provided, and the two are made of different materials, so that the elastic modulus of the transition zone 1221 is smaller than the elastic modulus of the support zone 1222, so that the bending stiffness of the transition zone 1221 can be between the flexible bending member 121 and the support zone 1222, thereby realizing that the bending stiffness of the support structure 12 gradually increases from the flexible bending member 121 along the first direction f1 to the transition zone 1221 and the support zone 1222. In this embodiment, the transition zone 1221 is formed as a weakened portion 1221a.

[0125] As a second optional implementation, Fig.18As shown, the transition zone 1221 is provided with a transition portion 1221b connected to the flexible bending member 121, and the transition portion 1221b is located between the transition zone 1221 and the flexible bending member 121, and the elastic modulus of the transition portion 1221b is between the flexible bending member 121 and the transition zone 1221, so that the bending stiffness of the transition portion 1221b can be between the flexible bending member 121 and the transition zone 1221, thereby realizing that the bending stiffness of the support structure 12 gradually increases from the flexible bending member 121 along the first direction f1 to the transition zone 1221 and the support zone 1222. In this embodiment, the transition portion 1221b is formed as the weakening portion 1221a.

[0126] As a third optional implementation, Fig.19 and Fig. 20 As shown, the weakening portion 1221a may include a weakening space 1221c set in the transition zone 1221, that is, a weakening space 1221c is set on the transition zone 1221 to form the weakening portion 1221a, which can reduce the structural strength of the transition zone 1221 and reduce the bending stiffness of the transition zone 1221, thereby achieving a gradual increase in the bending stiffness of the support structure 12 from the flexible bending part 121 along the first direction f1 to the transition zone 1221 and the support zone 1222.

[0127] According to the above description, it can be known that by adopting the implementation modes, the bending stiffness of the support structure 12 can be gradually increased from the flexible bending part 121 to the support part 122, thereby alleviating the sudden change in the bending stiffness between the flexible bending part 121 and the support part 122, so that the bending stiffness of the support structure 12 can achieve a smooth transition between the flexible bending part 121 and the support part 122, thereby effectively improving the problem of mold imprinting on the flexible screen caused by deformation caused by the sudden change in the local bending stiffness of the support structure 12.

[0128] The inventor has found through research that, by adopting the first optional embodiment and the second optional embodiment, the support structure 12 will form at least two joints. For example, for the first optional embodiment, the flexible bending member 121, the transition zone 1221 and the support zone 1222 are respectively made of materials with different elastic moduli. Generally, there is a joint between the flexible bending member 121 and the transition zone 1221, and another joint is formed between the transition zone 1221 and the support zone 1222. For the second optional embodiment, under the premise that the transition zone 1221 and the support zone 1222 are formed into an integral structure using the same material, the flexible bending member 121, the transition zone 1221 and the support zone 1222 are respectively made of materials with different elastic moduli. Generally, there is a joint between the flexible bending member 121 and the transition zone 1221, and another joint is formed between the transition zone 1221 and the support zone 1222. 1. The transition part 1221b and the transition zone 1221 are respectively made of materials with different elastic moduli. Under normal circumstances, a joint will be formed between the flexible bending part 121 and the transition part 1221b, and another joint will be formed between the transition part 1221b and the transition zone 1221. The more joints there are in the support structure 12, the greater the probability of fracture. Therefore, the present application further considers the design of reducing joints and adopts the third optional implementation. At this time, the transition zone 1221 and the support zone 1222 can be formed into an integral structure, generally forming a joint between the flexible bending part 121 and the transition zone 1221, so as to reduce the formation of joints. That is, by adopting the third optional implementation, the probability of fracture of the support structure 12 can be reduced on the basis of forming a gradual transition of anti-bending stiffness at the junction of the flexible bending part 121 and the support part 122.

[0129] In the third embodiment, an exemplary embodiment, Fig.21 and Fig. 22 As shown, the weakened space 1221a is filled with a flexible material (eg, organic matter).

[0130] Another exemplary example is Fig.23 and Fig.24 As shown, the support structure 12 further includes a flexible layer 124, which is disposed on the surface of the flexible bending member 121 along its thickness direction f2, and extends along the first direction f1 and is disposed on the surface of the support area 1222 along its thickness direction f2.

[0131] Another exemplary example is Fig.25 and Fig.26 As shown, the flexible bending member 121 includes a bending portion 1211 and an extension portion 1212 connected to the bending portion 1211, the bending portion 1211 is connected to the transition zone 1221 along a first direction f1, and the extension portion 1212 extends from the connection between it and the bending portion 1211 along the first direction f1 and is at least partially arranged in the weakening space 1221a.

[0132] By adopting the above three schemes, flexible materials, flexible layer 124 or extended part 1212 can be used to shield and weaken the sharp corners at the connection between the inner wall surface of space 1221a and the surface of transition zone 1221 along its thickness direction f2 to a certain extent, so as to avoid damage to the flexible screen by the sharp corners, thereby greatly reducing the risk of the flexible screen being damaged by the sharp corners.

[0133] Optionally, the flexible material may be an organic polymer material with low modulus (i.e., a flexible polymer material), such as thermoplastic polyurethane (TPU), polyethylene glycol terephthalate (PET), thermosetting polyimide (PI), resin, etc. The material of the flexible layer 124 may also be an organic polymer material with low modulus (i.e., a flexible polymer material), such as thermoplastic polyurethane (TPU), polyethylene glycol terephthalate (PET), thermosetting polyimide (PI), resin, etc.

[0134] See also Fig. 27 , Fig. 27 An exemplary support structure provided by an embodiment of the present application and in which the weakened space is realized by openings is shown. The weakened space 1221c in the embodiment of the present application includes an opening 1221d arranged on the surface of the transition zone 1221 along its thickness direction f2, that is, an opening 1221d is arranged on the surface of the transition zone 1221 along its thickness direction f2 to form the weakened space 1221c, thereby forming the weakened portion. By setting the opening 1221d, the structural strength of the transition zone 1221 is reduced, the bending stiffness of the transition zone 1221 is reduced, and the bending stiffness of the transition zone 1221 is gradually reduced to be close to the bending stiffness of the flexible bending member 121, so that the bending stiffness of the support structure 12 is gradually increased from the flexible bending member 121 to the support member 122, avoiding stress concentration and deformation caused by a sudden change in the bending stiffness, thereby causing the problem of mold printing of the flexible screen 11.

[0135] For example, the opening 1221d may be a circular hole (eg Fig. 27 As shown), long strip holes (such as Fig.28 and Fig.29 as shown), or other special-shaped holes (such as Fig.30 As shown in the figure, etc. Since the opening 1221d is arranged in the transition zone 1221 of the rigid support member 122, the opening 1221d generally does not need to be stretched, so the opening 1221d can be designed as a small round hole to avoid forming a slender rib to avoid damage to the flexible screen.

[0136] The technical solution of the present application is further described in detail below by taking the opening 1221d as a circular hole as an example.

[0137] In this application, if Figure 31 to Figure 34 As shown, the opening 1221d includes a through hole and / or a blind hole. Fig.32 As shown, the openings 1221d may all be through holes, or, as shown in FIG. Fig.33 As shown, the openings 1221d may all be blind holes, or, as shown in FIG. Fig.34 As shown, the opening 1221d may be partially through holes and partially blind holes. As long as the bending stiffness of the support structure can be gradually increased from the flexible bending member to the transition area 1221 and the support area 1222, this embodiment does not make any specific limitation on this.

[0138] In some optional embodiments, such as Fig.31 As shown, there may be a plurality of openings 1221d, and the plurality of openings 1221d may be arranged at intervals along the first direction f1, and the plurality of openings 1221d may also be arranged at intervals along the second direction f3, that is, the plurality of openings 1221d may be arranged at intervals along the first direction f1 and the second direction f3.

[0139] Furthermore, the apertures of the multiple openings 1221d may gradually decrease along the first direction f1, that is, among the multiple openings 1221d arranged along the first direction f1, the openings 1221d closer to the flexible bending member 121 have larger apertures, and the closer the transition zone 1221 is to the flexible bending member 121, the lower the bending stiffness is, and the closer it can be to the bending stiffness of the flexible bending member 121. By designing multiple openings 1221d with radial dimensions decreasing along the first direction f1 on the transition zone 1221 of the support member 122, the bending stiffness of the transition zone 1221 can be gradually reduced from the support zone 1222 to the flexible bending member 121, so that the bending stiffness at the junction of the flexible bending member 121 and the transition zone 1221 can be reduced to a level close to the bending stiffness of the flexible bending member 121, avoiding sudden changes in the bending stiffness, so that the bending stiffness of the support structure 12 can achieve a smooth transition between the flexible bending member 121 and the support member 122, thereby effectively improving the problem of mold imprinting on the flexible screen caused by deformation caused by sudden changes in the local bending stiffness of the support structure 12.

[0140] In addition, compared with the method of setting a transition portion with an elastic modulus between the flexible bending member 121 and the support member 122, since the elastic modulus between the flexible bending member 121 and the support member 122 is still relatively large, if you want to achieve a smooth transition of the anti-bending stiffness between the flexible bending member 121 and the support member 122, you need to set multiple transition portions with gradually decreasing anti-bending stiffness along the first direction f1, which will cause the support structure 12 to have more joints, thereby increasing the probability of the support member 122 breaking. Therefore, a plurality of openings 1221d with radial dimensions decreasing along the first direction f1 are designed on the transition zone 1221, which can achieve a smooth transition of the anti-bending stiffness from the flexible bending member 121 to the support member 122, while reducing the probability of the support structure 12 breaking when bending.

[0141] It can be understood that when the opening 1221d is a circular hole, the aperture of the opening 1221d is the diameter of the opening 1221d; when the opening 1221d is an elongated hole, the aperture of the opening 1221d is the length or width.

[0142] When the opening 1221d includes at least a blind hole, that is, Fig.33 As shown, the openings 1221d may all be blind holes, or, as shown in FIG. Fig.34 As shown, the openings 1221d may be partially through holes and partially blind holes. Moreover, the opening depths of the plurality of openings 1221d in the thickness direction f2 of the support member 122 gradually decrease along the first direction f1, that is, among the plurality of openings 1221d arranged along the first direction f1, the opening depths of the openings 1221d closer to the flexible bending member 121 are greater, and the bending stiffness of the transition zone 1221 closer to the flexible bending member 121 is lower, and the transition zone 1221 is closer to the bending stiffness of the flexible bending member 121. By designing multiple openings 1221d on the transition zone 1221 of the support member 122, whose opening depths decrease along the first direction f1, it is also possible to achieve an effect in which the bending stiffness of the transition zone 1221 gradually decreases from the support zone 1222 to the flexible bending member 121, so that the bending stiffness at the junction of the flexible bending member 121 and the transition zone 1221 can be reduced to a level close to the bending stiffness of the flexible bending member 121, thereby avoiding sudden changes in the bending stiffness. As a result, the bending stiffness of the support structure 12 can achieve a smooth transition between the flexible bending member 121 and the support member 122, thereby effectively improving the problem of mold imprinting on the flexible screen caused by deformation caused by sudden changes in the local bending stiffness of the support structure 12.

[0143] In addition, compared with the method of setting a transition portion with an elastic modulus between the flexible bending member 121 and the support member 122, since the elastic modulus between the flexible bending member 121 and the support member 122 is still relatively large, if you want to achieve a smooth transition of the anti-bending stiffness between the flexible bending member 121 and the support member 122, you need to set multiple transition portions with gradually decreasing anti-bending stiffness along the first direction f1, which will cause the support structure 12 to have more joints, thereby increasing the probability of the support member 122 breaking. Therefore, designing multiple openings 1221d with opening depths that decrease along the first direction f1 on the transition zone 1221 can also achieve a smooth transition of the anti-bending stiffness from the flexible bending member 121 to the support member 122, while reducing the probability of the support structure 12 breaking when bending.

[0144] The technical solution of the present application is further described in detail below by taking the opening 1221d as a through hole as an example.

[0145] See also Fig.35 and Fig.36 The flexible bending member 121 in the embodiment of the present application may include a bending portion 1211 and an extension portion 1212 connected to the bending portion 1211, the bending portion 1211 is connected to the transition zone 1221 along the first direction f1, the extension portion 1212 extends from the connection between it and the bending portion 1211 to the transition zone 1221, and covers the surface of the transition zone 1221 along its thickness direction f2, and at least part of the extension portion 1212 is located in the opening 1221d, that is, the extension portion 1212 may include a first portion 1212a and a second portion 1212d, the first portion 1212a is connected to the bending portion 1211, and extends along the first direction f1 and is arranged on the surface of the transition zone 1221 along its thickness direction f2, and the second portion 1212d is connected to the first portion 1212a and is arranged in the opening 1221d.

[0146] By adopting the above design, the extended portion 1212 of the flexible bending member 121 has not only a part (i.e., the first part 1212a) connected to the surface of the transition zone 1221 in the thickness direction f2, but also another part (i.e., the second part 1212d) embedded in the opening 1221d. This can further increase the connection area between the flexible bending member 121 and the support member 122, and further improve the connection stability between the flexible bending member 121 and the support member 122, which can greatly reduce the probability of the support structure 12 breaking when bending.

[0147] Furthermore, since the aperture of the opening 1221d is generally small, generally 0.1mm-0.2mm, it is usually necessary to etch the opening 1221d in the transition zone by etching. Therefore, it is inevitable that a sharp corner will be formed at the connection between the hole wall of the opening 1221d and the surface of the transition zone 1221 in the thickness direction f2. By filling the opening 1221d with a flexible polymer material, the extension portion 1212 can be used to a certain extent to block the sharp corner of the connection between the hole wall of the opening 1221d and the surface of the transition zone 1221 in the thickness direction f2, so as to avoid damage to the flexible screen caused by the sharp corner, thereby solving the problem of damage to the flexible screen 11 caused by the sharp corner of the connection between the hole wall of the opening 1221d and the surface of the transition zone 1221 in the thickness direction f2, and reducing the risk of the flexible screen being damaged by the support structure 12.

[0148] In the actual preparation process, the liquid or viscous organic polymer material can be printed on the end surface of the transition zone 1221 in the first direction f1 to form the bending portion 1211, and the liquid or viscous organic polymer material can be printed on the surface of the transition zone 1221 along its thickness direction f2 to form the first part 1212a of the extension portion 1212. At the same time, in this process, the liquid or viscous organic polymer material will also flow into the opening 1221d to form the second part 1212d of the extension portion 1212.

[0149] The first case, such as Fig.35 As shown, the first portion 1212a of the extension portion 1212 may be disposed on the surface of the transition region 1221 facing away from the flexible screen. In this case, the first portion 1212a may not extend to the surface of the support region 1222 facing away from the flexible screen (eg, Fig.35 ), and may also extend to the surface of the support area 1222 facing away from the flexible screen (as shown in Fig.37 shown).

[0150] The second case, such as Fig.38 and Fig.39 As shown, the first portion 1212a of the extension portion 1212 can be arranged on the surface of the transition zone 1221 facing the flexible screen. In this case, in order to avoid damage to the flexible screen, it is usually necessary to keep the surface of the support structure 12 facing the flexible screen in a flat manner. In order to keep the surface of the support structure 12 facing the flexible screen in a flat manner, an exemplary embodiment is as follows: Fig.38 As shown, the first portion 1212a can extend from the bent portion 1211 along the first direction to be sequentially arranged on the surface of the transition area 1221 and the support area 1222 facing the flexible screen, so that the surface of the support structure 12 facing the flexible screen remains in a planar arrangement. Fig.39As shown, the surface of the transition zone 1221 facing the flexible screen is lower than the surface of the supporting zone 1222 facing the flexible screen to form a receiving space, so that the first part 1212a can be arranged in the receiving space, so that the surface of the first part 1212a facing the flexible screen can be kept flush with the surface of the supporting zone 1222 facing the flexible screen, so that the surfaces of the flexible bending member 121 and the support member 122 facing the flexible screen are kept flush, and further the surface of the supporting structure 12 facing the flexible screen is kept in a planar arrangement.

[0151] The third case, such as Fig.40 As shown, the first part 1212a of the extension part 1212 can be simultaneously arranged on the surface of the transition zone 1221 facing the flexible screen, and on the surface of the transition zone 1221 facing away from the flexible screen. Specifically, the first part 1212a includes a first sub-part 1212b and a second sub-part 1212c, the first sub-part 1212b is arranged on the surface of the transition zone 1221 facing the flexible screen, and the second sub-part 1212c is arranged on the surface of the transition zone 1221 facing the flexible screen. In this case, the positional relationship between the first sub-part 1212b and the support member 122 can refer to the positional relationship between the first part 1212a and the support member 122 in the first case; and the positional relationship between the second sub-part 1212c and the support member 122 can refer to the positional relationship between the first part 1212a and the support member 122 in the second case, so it will not be repeated in detail here.

[0152] It can be understood that in the present application, as long as the connection stability between the flexible bending member 121 and the supporting member 122 can be enhanced, the embodiments of the present application do not make any specific limitations on this.

[0153] See also Fig.41 , Fig.41Another exemplary support structure provided by an embodiment of the present application is shown, and the weakened space is realized by making the thickness of the transition zone smaller than the thickness of the support zone. The thickness h2 of the transition zone 1221 in the embodiment of the present application is smaller than the thickness h3 of the support zone 1222, so as to form a first step 1223 between the transition zone 1221 and the support zone 1222, and the first step 1223 has a first step surface 1223a formed in the transition zone 1221 and a first side surface 1223e formed in the support zone 1222, and the first step surface 1223a and the first side surface 1223e are connected to form the weakened space 1221c therebetween. By adopting the above design, the thickness h2 of the transition zone 1221 is made smaller than the thickness h3 of the support zone 1222, so as to reduce the structural strength of the junction between the support member 122 and the flexible bending member 121, reduce the bending stiffness at the junction between the support member 122 and the flexible bending member 121, and allow the bending stiffness at the junction between the support member 122 and the flexible bending member 121 to gradually decrease to a level close to the bending stiffness of the flexible bending member 121, so that the bending stiffness of the support structure 12 can gradually increase from the flexible bending member 121 to the support member 122, thereby avoiding stress concentration and deformation caused by a sudden change in the bending stiffness, which may cause mold printing problems on the flexible screen.

[0154] See also Fig.42 and Fig.43 The first step surface 1223a may include sub-step surfaces 1223b arranged continuously along the first direction f1, for example, two sub-step surfaces 1223b, three sub-step surfaces 1223b, four sub-step surfaces 1223b, five step surfaces 1223b, etc., so that the thickness of the transition zone 1221 gradually increases along the first direction f1, that is, the closer the transition zone 1221 is to the flexible bending member 121, the smaller the thickness is, the closer the transition zone 1221 is to the flexible bending member 121, the lower the bending stiffness is, and the closer it is to the flexible bending member 121, the lower the bending stiffness is. Bending stiffness is to achieve the effect that the bending stiffness of the transition zone 1221 gradually decreases from the support zone 1222 to the flexible bending part 121, so that the bending stiffness at the junction of the flexible bending part 121 and the support part 122 can be reduced to be close to the bending stiffness of the flexible bending part 121, avoiding sudden changes in the bending stiffness, so that the bending stiffness of the support structure 12 can achieve a smooth transition between the flexible bending part 121 and the support part 122, thereby effectively improving the problem of mold imprinting on the flexible screen caused by deformation caused by sudden changes in the local bending stiffness of the support structure 12.

[0155] In addition, compared with the method of setting a transition portion with an elastic modulus between the flexible bending member 121 and the support member 122, since the elastic modulus between the flexible bending member 121 and the support member 122 is still relatively large, if it is desired to achieve a smooth transition of the anti-bending stiffness between the flexible bending member 121 and the support member 122, it is necessary to set a plurality of transition portions whose anti-bending stiffness gradually decreases along the first direction f1, which will result in more joints in the support structure 12, thereby increasing the probability of the support member 122 breaking. Therefore, the first step surface 1223a includes a plurality of sub-step surfaces 1223b arranged continuously along the first direction f1, so that the thickness h2 of the transition zone 1221 gradually increases along the first direction f1, which can achieve a smooth transition of the anti-bending stiffness from the flexible bending member 121 to the support member 122, while reducing the probability of the support structure 12 breaking when bending.

[0156] See also Fig.43 In the present application, the spacing t0 between two adjacent sub-step surfaces 1223b in the thickness direction f2 of the transition zone 1221 can be gradually reduced along the first direction f1. In this way, the thickness increase of the transition zone 1221 can be reduced along the first direction f1, so as to avoid the local sudden change in the thickness of the transition zone 1221, which leads to the local sudden change in the bending stiffness of the transition zone 1221, so that the bending stiffness of the transition zone 1221 can be gradually decreased from the support zone 1222 to the flexible bending member 121 more evenly, so that the bending stiffness of the support structure 12 can transition more smoothly between the flexible bending member 121 and the support member 122, and the problem of mold printing of the flexible screen caused by deformation caused by the sudden change in the local bending stiffness of the support structure 12 can be better improved.

[0157] In this application, if Fig.43 As shown, for ease of description, the sub-step surface 1223b farthest from the support area 1222 in the first direction f1 among the multiple sub-step surfaces 1223b is configured as the head step surface 1223c, the thickness of the transition area 1221 where the head step surface 1223c is located is t1, and the sub-step surface adjacent to the head step surface 1223c is configured as the middle step surface. Among them, t1>t0max, t0max is the maximum distance between two adjacent sub-step surfaces 1223b in the thickness direction f2.

[0158] When the range defined by the above relationship is satisfied, it can avoid that the thickness of the transition zone 1221 where the middle step surface is located is too large, which causes local mutations in the thickness of the transition zone 1221 where the middle step surface is located and the transition zone 1221 where the head end step surface 1223c is located, so as to avoid local mutations in the bending stiffness caused by the local mutation in thickness of the transition zone 1221, thereby making the bending stiffness of the transition zone 1221 gradually decrease from the support zone 1222 to the flexible bending part 121 more uniform, thereby making the bending stiffness of the support structure 12 transition more smoothly between the flexible bending part 121 and the support part 122, which can better improve the problem of mold imprinting of the flexible screen caused by deformation caused by the mutation in the local bending stiffness of the support structure 12.

[0159] Further, for the convenience of description, the present application also configures the sub-step surface 1223b closest to the support area 1222 in the first direction f1 among the multiple sub-step surfaces 1223b as the last step surface 1223d, and the spacing between the last step surface 1223d and the surface of the support area 1222 along its thickness direction f2 is t2. t2<t0min, where t0min is the minimum spacing between two adjacent sub-step surfaces 1223b in the thickness direction f2.

[0160] When the range defined by the above relationship is satisfied, the thickness of the support area 1222 can be prevented from being too large, and a local mutation in the thickness of the transition area 1221 where the support area 1222 and the end step surface 1223d are located can be avoided, thereby avoiding a local mutation in the bending stiffness due to a local mutation in thickness between the support area 1222 and the transition area 1221, thereby allowing the bending stiffness of the support structure 12 to transition more smoothly between the flexible bending part 121 and the support part 122, and better improving the problem of mold imprinting on the flexible screen caused by deformation caused by the local mutation in the bending stiffness of the support structure 12.

[0161] The technical solution of the present application is further described in detail below by taking the example that the first step surface 1223a includes two sub-step surfaces 1223b.

[0162] In this application, if Fig.44 and Fig.45As shown, the flexible bending member 121 includes a bending portion 1211 and an extension portion 1212 connected to the bending portion 1211, the bending portion 1211 is connected to the transition zone 1221 along a first direction f1, the thickness h4 of the extension portion 1212 is less than the thickness h5 of the bending portion 1211, so as to form a second step 1213 between the extension portion 1212 and the bending portion 1211, the second step has a second step surface 1213a formed on the extension portion 1212 and a second side surface 1213b formed on the bending portion 1211, the second step surface 1213a is attached to the first step surface 1223a, and the second side surface 1213b is attached to the first side surface 1223e. In this way, while achieving a smooth transition of the bending stiffness of the support structure 12 between the flexible bending member 121 and the support member 122, the connection area between the flexible bending member 121 and the support member 122 can be increased, thereby improving the connection stability between the flexible bending member 121 and the support member 122 and reducing the probability of the support structure 12 breaking when bending.

[0163] An exemplary example is Fig.44 As shown, the extension portion 1212 may be disposed on a side of the transition region 1221 facing away from the flexible screen.

[0164] Another exemplary example is Fig.46 As shown, the extension portion 1212 may be disposed on a side of the transition region 1221 facing the flexible screen.

[0165] Another exemplary example is Fig.47 As shown, the extension portion 1212 can be arranged at the same time on the side of the transition zone 1221 facing away from the flexible screen, and on the side of the transition zone 1221 facing the flexible screen. In this example, there are two extension portions 1212, one of which is arranged on the side of the transition zone 1221 facing away from the flexible screen, and the other extension portion 1212 is arranged on the side of the transition zone 1221 facing the flexible screen.

[0166] In the above three exemplary schemes, since the thickness of the transition zone 1221 is smaller than the thickness of the supporting zone 1222, and the extension portions 1212 are all located on the surface of the transition zone 1221 along its thickness direction f2, the surface of the extension portion 1212 in the thickness direction f2 and the surface of the supporting zone 1222 in the thickness direction f2 can be kept flush, that is, the surfaces of the flexible bending member 121 and the supporting member 122 facing the flexible screen can be kept flush to avoid damage to the flexible screen.

[0167] See also Fig.48 and Fig.49The transition zone 1221 in the present application has two third side surfaces 1221e arranged opposite to each other along its thickness direction f2, and the transition zone 1221 also has a first end surface 1221f facing away from the support zone, the first end surface 1221f is connected to the flexible bending member 121, and a first inclined surface 1221g is arranged between the third side surface 1221e and the first end surface 1221f, and the angle between the first inclined surface 1221g and the first end surface 1221f is greater than 90°, so that the thickness of the transition zone 1221 gradually increases along the first direction f1, so that the transition zone 1221 forms the weakened portion 1221a. Such a design, by gradually increasing the thickness of the transition zone 1221 along its thickness direction f2 along the first direction f1, can allow the structural strength of the support structure 12 to gradually increase from the flexible bending part 121 to the support part 122, and allow the bending stiffness of the support structure 12 to gradually increase from the flexible bending part 121 to the support part 122, thereby alleviating the sudden change in the bending stiffness between the flexible bending part 121 and the support part 122, so that the bending stiffness of the support structure 12 can achieve a smooth transition between the flexible bending part 121 and the support part 122, thereby effectively improving the problem of mold imprinting on the flexible screen caused by deformation caused by the sudden change in the local bending stiffness of the support structure 12.

[0168] In this application, if Fig.49 As shown, the first inclined surface 1221g has a first side 1221h connected to the first end surface 1221f, and also has a second side 1221i connected to the third side 1221e. Along the first direction, the distance b2 between the first side 1221h and the second side 1221i can be 1mm-5mm, for example, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm, and the thickness h3 of the support area 1222 can be 0.1mm-0.15mm, for example, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm or 0.15mm, etc. By limiting the above-mentioned dimensions, it is possible to avoid the first inclined surface 1221g being too steep, that is, it is possible to avoid the inclination angle of the first inclined surface 1221g being too large, thereby alleviating the sudden change in the anti-bending stiffness between the flexible bending part 121 and the support part 122, so that the anti-bending stiffness of the support structure 12 can achieve a smooth transition between the flexible bending part 121 and the support part 122, thereby effectively improving the problem of mold imprinting on the flexible screen caused by deformation caused by the sudden change in the local anti-bending stiffness of the support structure 12.

[0169] See also Fig.50 , Fig.51 and Fig.52The flexible bending member 121 in the embodiment of the present application includes a bending portion 1211 and an extension portion 1212 connected to the bending portion 1211, the bending portion 1211 is connected to the first end surface 1221f, the extension portion 1212 extends along the first direction f1, and the extension portion 1212 has a second inclined surface 1212e that is fitted and connected to the first inclined surface 1221g, so that the connection area between the flexible bending member 121 and the support member 122 can be increased, the connection stability between the flexible bending member 121 and the support member 122 can be improved, and the probability of the support structure 12 breaking during bending can be reduced.

[0170] An exemplary example is Fig.50 As shown, the extension portion 1212 may be disposed on a side of the transition region 1221 facing away from the flexible screen.

[0171] Another exemplary example is Fig.51 As shown, the extension portion 1212 may be disposed on a side of the transition region 1221 facing the flexible screen.

[0172] Another exemplary example is Fig.52 As shown, the extension portion 1212 can be arranged at the same time on the side of the transition zone 1221 facing away from the flexible screen, and on the side of the transition zone 1221 facing the flexible screen. In this example, there are two extension portions 1212, one of which is arranged on the side of the transition zone 1221 facing away from the flexible screen, and the other extension portion 1212 is arranged on the side of the transition zone 1221 facing the flexible screen.

[0173] In the above three exemplary schemes, since the thickness of the transition zone 1221 is smaller than the thickness of the supporting zone 1222, and the extension portions 1212 are all located on the surface of the transition zone 1221 along its thickness direction f2, the surface of the extension portion 1212 in the thickness direction f2 and the surface of the supporting zone 1222 in the thickness direction f2 can be kept flush, that is, the surfaces of the flexible bending member 121 and the supporting member 122 facing the flexible screen can be kept flush to avoid damage to the flexible screen.

[0174] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0175] In addition, the above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the content of this specification should not be understood as limiting the present application, and the protection scope of the present application shall be subject to the attached claims.

Claims

1. A support structure, characterized in that: The support structure comprises: A flexible bending member; and A support member, wherein the support member is connected to the flexible bending member, the support member includes a transition zone and a support zone connected along a first direction, the transition zone is connected to the flexible bending member, and the transition zone is provided with a weakening portion, the weakening portion is configured to reduce the bending stiffness of the transition zone, so that the bending stiffness of the support structure gradually increases from the flexible bending member along the first direction to the transition zone and the support zone.

2. The support structure according to claim 1, characterized in that: The weakening portion includes a weakening space provided in the transition area.

3. The support structure according to claim 2, characterized in that: The weakened space is filled with a flexible material.

4. The support structure according to claim 2, characterized in that: The support structure further includes a flexible layer, which is disposed on a surface of the flexible bending member along a thickness direction thereof and is extended along the first direction and disposed on a surface of the support area along the thickness direction thereof.

5. The support structure according to claim 2, characterized in that: The flexible bending member includes a bending portion and an extension portion connected to the bending portion, the bending portion is connected to the transition zone along the first direction, and the extension portion extends from the connection between the bending portion and the extension portion along the first direction and is at least partially arranged in the weakening space.

6. The support structure according to claim 2, characterized in that: The weakened space includes an opening arranged on the surface of the transition zone along the thickness direction thereof, and the opening includes a through hole and / or a blind hole.

7. The support structure according to claim 6, characterized in that There are a plurality of openings, and the plurality of openings are arranged at intervals along the first direction. The apertures of the plurality of openings gradually decrease along the first direction, so that the bending stiffness of the transition zone gradually increases along the first direction.

8. The support structure according to claim 6, characterized in that: There are multiple openings, and the multiple openings are arranged along the first direction. When the multiple openings include blind holes, the opening depths of the multiple openings gradually decrease along the first direction so that the bending stiffness of the transition zone gradually increases along the first direction.

9. The support structure according to any one of claims 6 to 8, characterized in that: The flexible bending member comprises a bending portion and an extending portion connected to the bending portion; The bent portion is connected to the transition zone along the first direction; The extension portion extends from a connection between the extension portion and the bent portion toward the transition zone and covers a surface of the transition zone along a thickness direction thereof, and at least a portion of the extension portion is located in the opening.

10. The support structure according to claim 2, characterized in that: The thickness of the transition zone is smaller than that of the supporting zone to form a first step between the transition zone and the supporting zone, the first step having a first step surface formed in the transition zone and a first side surface formed in the supporting zone, the first step surface and the first side surface being connected to form the weakened space therebetween.

11. The support structure according to claim 10, characterized in that The first step surface includes a plurality of sub-step surfaces arranged continuously along the first direction, so that the thickness of the transition zone gradually increases along the first direction.

12. The support structure according to claim 11, characterized in that The distance between two adjacent sub-step surfaces in the thickness direction of the transition zone gradually decreases along the first direction.

13. The support structure according to any one of claims 10 to 12, characterized in that: The flexible bending member comprises a bending portion and an extending portion connected to the bending portion; The bent portion is connected to the transition zone along the first direction; The thickness of the extension portion is smaller than the thickness of the bending portion so as to form a second step between the extension portion and the bending portion, the second step having a second step surface formed on the extension portion and a second side surface formed on the bending portion, the second step surface being attached to the first step surface, and the second side surface being attached to the first side surface.

14. The support structure according to claim 1, characterized in that The transition zone has two third side surfaces that are arranged opposite to each other along the thickness direction thereof, and the transition zone also has a first end surface that faces away from the support zone, and the first end surface is connected to the flexible bending member; A first inclined surface is provided between the third side surface and the first end surface, and an angle between the first inclined surface and the first end surface is greater than 90°, so that the thickness of the transition zone gradually increases along the first direction, so that the transition zone forms the weakened portion.

15. The support structure according to claim 14, characterized in that The thickness of the support area is 0.1mm-0.15mm; The first inclined surface has a first side edge connected to the first end surface, and the first inclined surface also has a second side edge connected to the third side surface. Along the first direction, a distance between the first side edge and the second side edge is 1 mm-5 mm.

16. The support structure according to claim 15, characterized in that The flexible bending member includes a bending portion and an extending portion connected to the bending portion, the bending portion is connected to the first end surface, and the extending portion has a second inclined surface that is in close contact with the first inclined surface.

17. The support structure according to claim 1, characterized in that The elastic modulus of the support member is ≥80GPa, and the elastic modulus of the flexible bending member is 10MPa-10GPa.

18. The support structure according to any one of claims 1 to 17, characterized in that: The support member includes a first sub-support member and a second sub-support member, the first sub-support member and the second sub-support member both include the transition zone and the support zone, and the flexible bending member is connected between the transition zone of the first sub-support member and the transition zone of the second sub-support member.

19. The support structure according to claim 18, characterized in that The thickness of the flexible bending member is smaller than the thickness of any of the transition zones, so as to form an escape space between the transition zone of the first sub-support member, the transition zone of the second sub-support member and the flexible bending member, and the escape space is used to escape the rotating shaft.

20. The support structure according to claim 19, characterized in that The difference in thickness between the transition zone and the flexible bending piece is 0.05 mm-0.1 mm.

21. A flexible display device, characterized in that: The flexible display device includes a flexible screen and a supporting structure as described in any one of claims 1 to 20, the flexible screen includes a bending zone and a non-bending zone connected to the bending zone, the supporting structure is arranged on one side of the flexible screen along its thickness direction, the flexible bending piece is arranged corresponding to the bending zone, and the supporting piece is arranged corresponding to the non-bending zone.

22. The flexible display device according to claim 21, characterized in that: The flexible screen is a folding screen or a scroll screen.

23. An electronic device, characterized in that: The electronic device has the flexible display device as claimed in claim 21 or 22.

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