Bamboo book assembly and preparation method thereof, display module and electronic equipment

Abstract

The invention provides a bamboo book assembly and a preparation method thereof, a display module and electronic equipment, and relates to the technical field of display, and the bamboo book assembly can be used for supporting a display screen so as to be bent according to an assumed moving track. The bamboo book assembly comprises a bent part, multiple sets of holes are formed in the bent part of the bamboo book assembly, filler is arranged in the multiple sets of holes, the filler can be made of a non-Newtonian fluid material, the bending modulus of the non-Newtonian fluid material is high during falling impact and bump of the boss, the bending modulus of the filler is high, and the bending modulus of the filler is high. The bending modulus of the bending part of the bamboo book assembly can be improved, the structural strength of the bending part is improved, and therefore the impact resistance of equipment carrying the bamboo book assembly in the bending area is improved. In the scene of low strain rate such as bending, the bending modulus of the non-Newtonian fluid material is low, so that the bending modulus of the filler is low, the bending modulus of the bending part of the bamboo book assembly is low, and the bending performance of the equipment in the bending area is guaranteed.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a bracket assembly, a preparation method thereof, a display module, and an electronic device. Background Art

[0002] In a folding screen device, in force-applied scenarios such as dropping impacts and bumping against bosses, the back of the screen will directly receive impacts from hard objects such as the rotating shaft, resulting in failure problems such as black spots and broken bright spots on the screen.

[0003] Since the folding screen device needs to be bent, the bracket (BKT) of the screen needs to be perforated at the bent part corresponding to the rotating shaft to support the screen to be bent along the intended running trajectory. After bending, the screen has a "water droplet" morphology. However, this also reduces the structural strength of the bracket at the bent part, and further reduces the impact resistance of the overall structure in the bent area.

[0004] Based on this, how to improve the impact resistance of a folding screen device while ensuring its bending performance has become an urgent problem in the field. Summary of the Invention

[0005] Embodiments of this application provide a bracket assembly, a preparation method thereof, a display module, and an electronic device, which can improve the impact resistance of the device while ensuring its bending performance.

[0006] To achieve the above object, embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, a bracket assembly is provided. The bracket assembly can be used to support a display screen so that the display screen can be bent along the intended running trajectory. The bracket assembly includes a bent part. Multiple groups of holes are formed in the bent part of the bracket assembly, and fillers are arranged in the multiple groups of holes. The material of the fillers may include non-Newtonian fluid materials. The molecular structure of the non-Newtonian fluid materials includes multiple coordination bonds. In scenarios of high-speed impacts such as dropping impacts and bumping against bosses, the strain rate of the non-Newtonian fluid materials is relatively high and the response time is relatively short. The coordination bonds have not had time to break, resulting in a relatively high bending modulus of the non-Newtonian fluid materials, and thus a relatively high bending modulus of the fillers.

[0008] By arranging the fillers in the multiple groups of holes of the bracket assembly, in the case of high-speed impacts, the bending modulus of the fillers is relatively high, which can increase the bending modulus of the bent part of the bracket assembly, improve the structural strength of the bent part, and thus enhance the impact resistance of the device equipped with the bracket assembly in the bent area.

[0009] Moreover, in scenarios with low strain rates such as bending, the coordination bonds in the non-Newtonian fluid material break, resulting in a low bending modulus of the non-Newtonian fluid material. Consequently, the bending modulus of the filler is low, and the bending modulus of the bent part of the bamboo book component is low, ensuring the bendability of the device in the bending region.

[0010] In some embodiments, the non-Newtonian fluid material includes polyborodimethylsiloxane.

[0011] In some embodiments, the non-Newtonian fluid material includes modified polyborodimethylsiloxane. The molecular structure of the modified polyborodimethylsiloxane includes a photosensitive group, which endows the modified polyborodimethylsiloxane with the ability of photocuring, and thus the non-Newtonian fluid material acquires the photocuring ability.

[0012] In some embodiments, the material of the filler further includes a photoinitiator, and the photoinitiator includes at least one of a cationic initiator or a radical initiator. The cationic initiator includes at least one of arene-iron salts, diaryliodonium salts, triarylsulfonium salts, iodonium salts or platinum-based catalysts, and the radical initiator includes ketones.

[0013] In some embodiments, after the filler is subjected to light treatment, the photoinitiator can initiate the polymerization reaction of the photosensitive groups in the non-Newtonian fluid material, causing the non-Newtonian fluid material to photocure and increasing the bending modulus of the filler.

[0014] Moreover, at different light intensities, the rates of the polymerization reaction initiated by the photoinitiator are different, and after the non-Newtonian fluid material photocures, the bending moduli of the fillers are different. Generally, the greater the light intensity, the faster the rate of the polymerization reaction initiated by the photoinitiator, the greater the crosslinking density after the non-Newtonian fluid material photocures, and the greater the bending modulus of the filler.

[0015] As a photoinitiator, the cationic initiator performs light treatment on the filler in air. The cationic initiator can enable the photocuring of the non-Newtonian fluid material to be unaffected by oxygen inhibition of polymerization, avoiding the phenomenon of internal curing and uncured surface of the non-Newtonian fluid material. Moreover, the cationic initiator can cause the non-Newtonian fluid material to "post-cure" or "dark polymerization", that is, after the filler leaves the light source, the cationic initiator can continue to initiate the polymerization reaction of the photosensitive groups in the non-Newtonian fluid material, causing the non-Newtonian fluid material to photocure. In addition, as a photoinitiator, the cationic initiator results in a low volume shrinkage rate after the non-Newtonian fluid material photocures, which is beneficial for the filler to fill multiple groups of holes in the bamboo book component.

[0016] In some embodiments, the multiple sets of holes include a first set of holes and a second set of holes. The flexural modulus of the filler in the first set of holes is greater than that of the filler in the second set of holes. By setting different flexural moduli of the fillers in the multiple sets of holes, the pattern design of the bamboo book component can be adapted, realizing a real-time "variable" bamboo book solution and meeting the bending requirements of the device.

[0017] In some embodiments, the flexural modulus of the filler in the first set of holes becomes larger after being treated with light, and the filler in the second set of holes is not treated with light, making the flexural modulus of the filler in the first set of holes greater than that of the filler in the second set of holes.

[0018] In some embodiments, both the filler in the first set of holes and the filler in the second set of holes are treated with light, and the light intensity of the light treatment for the filler in the first set of holes is greater than that of the light treatment for the filler in the second set of holes, making the flexural modulus of the filler in the first set of holes greater than that of the filler in the second set of holes.

[0019] In some embodiments, the bent portion of the bamboo book component has a bending axis, and the second set of holes is closer to the bending axis than the first set of holes.

[0020] It can be understood that the flexural modulus of the filler in the first set of holes is greater than that of the filler in the second set of holes. By setting the second set of holes closer to the bending axis than the first set of holes, the flexural modulus of the filler in the holes closer to the bending axis is smaller, which is beneficial to the bending of the bent portion of the bamboo book component.

[0021] In a second aspect, a method for preparing a bamboo book component is provided. The preparation method includes: forming multiple sets of holes on the bent portion of the bamboo book component and filling non-Newtonian fluid materials into the multiple sets of holes.

[0022] In the preparation method provided by the above embodiments of the present application, by filling non-Newtonian fluid materials into multiple sets of holes of the bamboo book component, in scenarios of high-speed impacts such as drop impacts and bumping against bosses, the flexural modulus of the non-Newtonian fluid material is relatively high, which can increase the flexural modulus of the bent portion of the bamboo book component and improve the structural strength of the bent portion, thereby enhancing the anti-impact ability of the device equipped with the bamboo book component in the bent area. In scenarios of low strain rates such as bending, the flexural modulus of the non-Newtonian fluid material is relatively low, and the flexural modulus of the bent portion of the bamboo book component is relatively low, ensuring the bendability of the device in the bent area.

[0023] In some embodiments, after filling non-Newtonian fluid materials into multiple sets of holes, a mask plate with through holes is provided on the bamboo book component. The through holes of the mask plate expose the first set of holes and cover the second set of holes. Then, light with a first light intensity is used to irradiate the non-Newtonian fluid material in the first set of holes through the through holes of the mask plate.

[0024] In some embodiments, the mask is removed, and the non-Newtonian fluid material in the second set of holes is irradiated with light having a second light intensity, where the first light intensity is greater than the second light intensity.

[0025] By using the shielding effect of the mask and irradiating different sets of holes with light of different light intensities, the flexural modulus of the non-Newtonian fluid material cured by light in different sets of holes is made different to adapt to the pattern design of the bamboo book component, realizing a real-time "variable" bamboo book solution and meeting the bending requirements of the device.

[0026] In some embodiments, after filling the non-Newtonian fluid material into multiple sets of holes, a mask is set on the bamboo book component, and a coating is set on the mask. The thickness of the part of the coating above the first set of holes is less than the thickness of the part of the coating above the second set of holes. Light passes through the coating and the mask to irradiate the non-Newtonian fluid material in the multiple sets of holes.

[0027] By using the coating on the mask to absorb light, by setting the different thicknesses of the parts of the coating above different sets of holes, the absorption amounts of ultraviolet light by different parts of the coating can be made different, and the transmittance of light through different parts of the coating is different, so as to achieve different light intensities for the light treatment of the filling materials in different sets of holes, and the flexural modulus of the non-Newtonian fluid material cured in different sets of holes is different to adapt to the pattern design of the bamboo book component, realizing a real-time "variable" bamboo book solution and meeting the bending requirements of the device.

[0028] In some embodiments, before filling the non-Newtonian fluid material into multiple sets of holes, the bamboo book component is set on the light-emitting surface side away from the display screen, and the multiple sets of holes are located on the surface of the bamboo book component away from the display screen. Alternatively, the bamboo book component is set on a substrate, and the multiple sets of holes are located on the surface of the bamboo book component away from the substrate to expose the multiple sets of holes of the bamboo book component, facilitating the filling of the non-Newtonian fluid material into the multiple sets of holes.

[0029] In some embodiments, the non-Newtonian fluid material is sprayed into the multiple sets of holes, or the non-Newtonian fluid material is scrape-coated into the multiple sets of holes.

[0030] In a third aspect, a display module is provided. The display module includes a display screen and the bamboo book component in any of the above embodiments. The bamboo book component is set on the light-emitting surface side away from the display screen, and the bamboo book component can be used to support the display screen so that the display screen can be bent along the envisioned operating trajectory.

[0031] In a fourth aspect, an electronic device is provided. The electronic device includes a housing and the display module in the above embodiments. The display module is set on the housing, and the housing can be bent to drive the display module to bend, and the housing is also used to protect the display module.

[0032] Understandably, for the display module and the electronic device provided in the above embodiments of the present application, the beneficial effects that can be achieved can refer to the beneficial effects of the bamboo book component in the above text, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Structural diagram of the foldable screen device provided by an embodiment of the present application;

[0034] Figure 2 Structural diagram of a display module provided by an embodiment of the present application;

[0035] Figure 3 Another structural diagram of the display module provided by an embodiment of the present application;

[0036] Figure 4 For Figure 3 Partial enlarged view of the display module at M in

[0037] Figure 5 Molecular structure diagram of the non-Newtonian fluid material provided by an embodiment of the present application;

[0038] Figure 6 Structural diagram of a bamboo book component provided by an embodiment of the present application;

[0039] Figures 7 to 10 Diagrams of each step for preparing the bamboo book component provided by an embodiment of the present application;

[0040] Figure 11 Another structural diagram of the bamboo book component provided by an embodiment of the present application;

[0041] Figures 12 to 15 Another diagrams of each step for preparing the bamboo book component provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] Next, the technical solutions in some embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments provided by the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0043] An embodiment of the present application provides an electronic device with a foldable screen, which electronic device may be, for example, a mobile phone, a tablet computer, a personal digital assistant (PDA), a television, a smart wearable product (e.g., a smart watch, a smart bracelet), a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a rechargeable small household appliance (e.g., a soymilk maker, a sweeping robot, a vacuum cleaner), a drone, a radar, aerospace equipment, and a vehicle-mounted equipment, etc., and the embodiment of the present application does not impose any special restrictions on the specific form of the electronic device.

[0044] Figure 1 A structural diagram of the folding screen device provided in an embodiment of the present application.

[0045] See also Figure 1 The folding screen device 1 includes a display module 2 and a housing 3. The display module 2 is arranged on the housing 3, and the display module 2 is located on the inner side of the housing 3. The housing 3 can be bent to drive the display module 2 to bend, and the housing 3 is also used to protect the display module 2.

[0046] Exemplarily, the shell 3 includes a shell 31 and a shaft 32. The two shells 31 are connected by the shaft 32. The two shells 31 can be rotated by rotating the shaft 32, thereby realizing the bending of the shell 3 and driving the bending of the display module 2. For example, the display module 2 has a "water drop" morphology after being bent.

[0047] Figure 2 A structural diagram of a display module provided in an embodiment of the present application.

[0048] See also Figure 2 The display module 2 includes a display screen 20 and a bracket (BKT) assembly 21. The bracket assembly 21 is arranged on the side of the light emitting surface P away from the display screen 20. The light emitting surface P is the front side of the display screen 20. The light emitting surface P can emit light to display images. The bracket assembly 21 is arranged on the side of the light emitting surface P away from the display screen 20, that is, the bracket assembly 21 is arranged on the back of the display screen 20. The bracket assembly 21 is bonded to the display screen 20 through the bonding layer 22 to achieve the connection between the bracket assembly 21 and the display screen 20.

[0049] For example, the material of the bamboo book assembly 21 may include stainless steel (SUS), titanium alloy, carbon fiber or graphite fiber, etc.

[0050] For example, the material of the adhesive layer 22 may include pressure sensitive adhesive (PSA).

[0051] Combined with Figure 1 and Figure 2 , the display module 2 can be bent together with the housing 3. The bamboo book component 21 in the display module 2 includes a bent portion 210, and the bent portion 210 of the bamboo book component 21 is close to the rotating shaft 32 of the housing 3. By forming multiple groups of holes 211 in the bent portion 210 of the bamboo book component 21, each group of holes 211 includes at least one hole 211, and the multiple groups of holes 211 can be blind holes or through holes, which can reduce the bending modulus of the bent portion 210 of the bamboo book component 21 and improve the bending performance of the bent portion 210.

[0052] The arrangement pattern of the multiple groups of holes 211 in the plane X - Y is also called the pattern of the bamboo book component 21. By designing the pattern of the bamboo book component 21, the bending modulus of different regions of the bent portion 210 can be selectively set to be different, so that the bamboo book component 21 supports the display screen 20 to be bent according to the designed operation trajectory, thereby realizing the design of the morphology of the display module 2 after bending. For example, the "water droplet" morphology design described above.

[0053] Please continue to refer to Figure 2 , the display module 2 further includes an optically clear adhesive (OCA) layer 23 and a cover plate 24 disposed on the light - emitting surface P of the display screen 20, and the cover plate 24 is bonded to the display screen 20 through the optically clear adhesive layer 23. The material of the cover plate 24 can be selected as a flexible material to ensure the bending performance of the display module 2.

[0054] Exemplarily, the material of the cover plate 24 may include polyethylene terephthalate (PET), colorless polyimide (CPI), or ultra - thin glass (UTG).

[0055] Figure 3 Another structural diagram of the display module provided by the embodiment of the present application.

[0056] Refer to Figure 3 , taking the display screen 20 in the display module 2 as an organic light - emitting diode (OLED) display screen as an example, the display screen 20 includes a substrate 200. The substrate 200 can be a single film layer or a composite laminate, and the material of the substrate 200 can be selected as a flexible material, such as polyimide, to ensure the bending performance of the display screen 20.

[0057] The display screen 20 further includes a driving circuit D and a light-emitting device L disposed on a substrate 200. The driving circuit D includes a plurality of thin film transistors (TFTs) 201. The light-emitting device L includes an anode 202, a light-emitting layer 203, and a cathode 204. The anode 202 is electrically connected to the thin film transistor 201 (the source or drain of the thin film transistor 201) among the plurality of thin film transistors 201 serving as a driving transistor. The anode 202 and the cathode 204 respectively receive electrical signals, and an electric field is generated therebetween. Under the action of the electric field, the light-emitting layer 203 can emit light to display an image.

[0058] The display screen 20 further includes a first inorganic encapsulation layer 205, an organic encapsulation layer 206, and a second inorganic encapsulation layer 207 sequentially disposed on a side of the cathode 204 away from the substrate 200. The first inorganic encapsulation layer 205 and the second inorganic encapsulation layer 207 are used to block moisture and oxygen. The organic encapsulation layer 206 has a certain flexibility and functions to absorb moisture. The structure of the display screen 20 in the present application is not limited thereto.

[0059] In the display module 2, the bamboo book component 21 is bonded to the substrate 200 of the display screen 20 through an adhesive layer 22, and the cover plate 24 is bonded to the second inorganic encapsulation layer 207 of the display screen 20 through an optical adhesive layer 23.

[0060] Figure 4 For Figure 3 a partial enlarged view of the display module at M in

[0061] See Figure 4 , fillers 212 are disposed in multiple groups of holes 211 of the bamboo book component 21. The material of the fillers 212 includes a non-Newtonian fluid material, and the non-Newtonian fluid material belongs to a shear thickening material.

[0062] Exemplarily, the non-Newtonian fluid material may include polyborodimethylsiloxane. Referring to the following chemical reaction formula (1), polyborodimethylsiloxane is formed by a polycondensation reaction between boric acid and polydimethylsiloxane.

[0063]

[0064] Figure 5 is a molecular structure diagram of the non-Newtonian fluid material provided by an embodiment of the present application.

[0065] See Figure 5 (a) in

[0066] See Figure 5In (b) of [reference], in scenarios of high-speed impacts such as drop impacts and boss knocks, the strain rate of the non-Newtonian fluid material is relatively high, and the response time is relatively short. The coordination bonds do not have time to break, resulting in a relatively high flexural modulus of the non-Newtonian fluid material (higher than the current adhesive material), thereby making the flexural modulus of the filler 212 relatively high.

[0067] By arranging the filler 212 in multiple groups of holes 211 of the bamboo book component 21, in the case of high-speed impacts, the filler 212 has a relatively high flexural modulus, which can increase the flexural modulus of the bent portion 210 of the bamboo book component 21, improve the structural strength of the bent portion 210, reduce the impact force of hard objects such as the rotating shaft 32 on the back of the display screen 20, and thus enhance the impact resistance of the device equipped with the bamboo book component 21 in the bent area.

[0068] See Figure 5 In (c) of [reference], in scenarios of low strain rates such as bending, the coordination bonds in the non-Newtonian fluid material break, resulting in a relatively low flexural modulus of the non-Newtonian fluid material (comparable to the adhesive material), thereby making the flexural modulus of the filler 212 relatively low and the flexural modulus of the bent portion 210 of the bamboo book component 21 relatively low, ensuring the bendability of the device in the bent area.

[0069] See Figure 5 In (c) and (a) of [reference], when the bending force is removed, the broken coordination bonds in the non-Newtonian fluid material reversibly recover and bond, the flexural modulus of the non-Newtonian fluid material increases, the flexural modulus of the filler 212 increases, the flexural modulus of the bent portion 210 of the bamboo book component 21 increases, and the structural strength of the bent portion 210 increases.

[0070] In some embodiments, when the material of the filler 212 includes a non-Newtonian fluid material, the non-Newtonian fluid material may include a modified polyborodimethylsiloxane. The molecular structure of the modified polyborodimethylsiloxane includes a photosensitive group, and the photosensitive group enables the modified polyborodimethylsiloxane to obtain photocuring ability, thereby enabling the non-Newtonian fluid material to obtain photocuring ability.

[0071] Exemplarily, referring to the following chemical reaction formula (2), by reacting polyborodimethylsiloxane with acrylic acid, the end groups of the polyborodimethylsiloxane are modified to obtain a modified polyborodimethylsiloxane. The end groups of the modified polyborodimethylsiloxane contain acrylate groups, and the acrylate group is a type of photosensitive group, and the acrylate group enables the modified polyborodimethylsiloxane to obtain photocuring ability. For example, after being irradiated with ultraviolet (UV) light, the modified polyborodimethylsiloxane can be induced to undergo a polymerization reaction (the acrylate groups undergo a polymerization reaction), realizing the photocuring of the modified polyborodimethylsiloxane.

[0072]

[0073] Exemplarily, the side groups of polyborodimethylsiloxane can also be modified. The side groups of the modified polyborodimethylsiloxane contain a photosensitive group R, and the photosensitive group R can include vinyl, acrylate group, or alicyclic epoxy group, etc. The photosensitive group R endows the modified polyborodimethylsiloxane with photocuring ability. For example, after being irradiated with ultraviolet light, the modified polyborodimethylsiloxane can be induced to undergo a polymerization reaction (the photosensitive group undergoes a polymerization reaction), realizing the photocuring of the modified polyborodimethylsiloxane.

[0074] For example, the molecular structure (3) of the side-group modified polyborodimethylsiloxane is as follows, where R is a photosensitive group:

[0075]

[0076] In some embodiments, when the non-Newtonian fluid material in the filler 212 has photocuring ability, the material of the filler 212 may further include a photosensitizer, and the photosensitizer includes at least one of a cationic initiator or a radical initiator.

[0077] It can be understood that after the filler 212 is irradiated with ultraviolet light, the photosensitizer can induce the photosensitive groups in the non-Newtonian fluid material to undergo a polymerization reaction, photocuring the non-Newtonian fluid material, and increasing the flexural modulus of the filler 212.

[0078] Moreover, at different light intensities, the rates of the polymerization reaction induced by the photosensitizer are different, and after the non-Newtonian fluid material is photocured, the flexural moduli of the filler 212 are different. Generally, the greater the light intensity, the faster the rate of the polymerization reaction induced by the photosensitizer, the greater the crosslinking density after the non-Newtonian fluid material is photocured, and the greater the flexural modulus of the filler 212.

[0079] Exemplarily, when the cationic initiator is used as the photosensitizer and the filler 212 is irradiated in the air, the cationic initiator can make the photocuring of the non-Newtonian fluid material not affected by oxygen inhibition of polymerization, avoiding the phenomenon that the non-Newtonian fluid material is internally cured and the surface is not cured. Moreover, the cationic initiator can make the non-Newtonian fluid material "post-cure" or "dark polymerization", that is, after the filler 212 leaves the light irradiation, the cationic initiator can continue to induce the polymerization reaction of the photosensitive groups in the non-Newtonian fluid material, photocuring the non-Newtonian fluid material. In addition, when the cationic initiator is used as the photosensitizer, the volume shrinkage rate after the non-Newtonian fluid material is photocured is relatively low, which is beneficial for the filler 212 to fill multiple groups of holes 211 of the bamboo book assembly 21.

[0080] For example, the cationic initiator may include at least one of arene iron salts, diaryliodonium salts, triarylsulfonium salts, iodonium salts, or platinum-based catalysts.

[0081] Exemplarily, the radical initiator may include ketones, and the molecular structure (4) of the ketones is as follows:

[0082]

[0083] Figure 6 This is a structural diagram of a bamboo book component provided by an embodiment of the present application.

[0084] See Figure 6 , multiple sets of holes 211 of the bamboo book component 21 are arranged along the direction X. The multiple sets of holes 211 of the bamboo book component 21 include a first set of holes 211a and a second set of holes 211b. Each set of holes 211 includes multiple holes. The multiple holes of the first set of holes 211a are divided into two parts, and in the direction X, these two parts of holes are respectively arranged on both sides of the second set of holes 211b.

[0085] Please continue to see Figure 6 , the flexural modulus of the filler 212 in the first set of holes 211a is greater than the flexural modulus of the filler 212 in the second set of holes 211b. By setting different flexural moduli of the filler 212 in multiple sets of holes 211, the pattern design of the bamboo book component 21 can be adapted to achieve a real-time "variable" bamboo book solution and meet the bending requirements of the folding screen device 1 equipped with the bamboo book component 21.

[0086] Exemplarily, after the filler 212 in the first set of holes 211a is treated by light, its flexural modulus becomes larger, and the filler 212 in the second set of holes 211b is not treated by light, so that the flexural modulus of the filler 212 in the first set of holes 211a is greater than the flexural modulus of the filler 212 in the second set of holes 211b.

[0087] Exemplarily, both the filler 212 in the first set of holes 211a and the filler 212 in the second set of holes 211b are treated by light, and moreover, the light intensity of the light treatment received by the filler 212 in the first set of holes 211a is greater than the light intensity of the light treatment received by the filler 212 in the second set of holes 211b, so that the flexural modulus of the filler 212 in the first set of holes 211a is greater than the flexural modulus of the filler 212 in the second set of holes 211b.

[0088] In some embodiments, see Figure 6 , the bent portion 210 of the bamboo book component 21 has a bending axis E. For example, the bending axis E extends along the direction Y. The bamboo book component 21 can be bent around the bending axis E, and the second set of holes 211b is closer to the bending axis E than the first set of holes 211a.

[0089] It is understandable that the flexural modulus of the filler 212 in the first group of holes 211a is greater than that of the filler 212 in the second group of holes 211b. By setting the second group of holes 211b closer to the bending axis E than the first group of holes 211a, the flexural modulus of the filler 212 in the holes closer to the bending axis E is smaller, which is beneficial to the bending of the bending part 210 of the bamboo book assembly 21.

[0090] The embodiments of the present application also provide Figure 6 a method for preparing the bamboo book assembly in Figures 7 to 10 which is a step diagram of each step for preparing a bamboo book assembly provided by the embodiments of the present application.

[0091] The method for preparing the bamboo book assembly 21 includes the following steps:

[0092] Refer to Figure 7 , the bamboo book assembly 21 includes a bending part 210, and multiple groups of holes 211 are formed on the bending part 210 of the bamboo book assembly 21. Each group of holes 211 includes at least one hole 211, and the hole 211 can be a blind hole or a through hole.

[0093] Exemplarily, the multiple groups of holes 211 are arranged along the direction X, and the multiple groups of holes 211 of the bamboo book assembly 21 include a first group of holes 211a and a second group of holes 211b.

[0094] Refer to Figure 8A and Figure 8B , place the bamboo book assembly 21 on the carrier 4.

[0095] Exemplarily, the carrier 4 can be a display screen 20. Place the bamboo book assembly 21 on the side of the light-emitting surface P away from the display screen 20, and the multiple groups of holes 211 are located on the surface of the bamboo book assembly 21 away from the display screen 20 to expose the multiple groups of holes 211 of the bamboo book assembly 21.

[0096] For example, the bamboo book assembly 21 can be bonded to the display screen 20 through a pressure-sensitive adhesive to fix the bamboo book assembly 21.

[0097] Exemplarily, the carrier 4 can also be a substrate. Place the bamboo book assembly 21 on the substrate, and the multiple groups of holes 211 are located on the surface of the bamboo book assembly 21 away from the substrate to expose the multiple groups of holes 211 of the bamboo book assembly 21.

[0098] Please continue to refer to Figure 8A and Figure 8B , and fill non-Newtonian fluid materials into the multiple groups of holes 211 of the bamboo book assembly 21.

[0099] Exemplarily, refer to Figure 8A , use a nozzle 5 to spray non-Newtonian fluid materials into the multiple groups of holes 211 of the bamboo book assembly 21.

[0100] Exemplarily, refer to Figure 8B , a mesh plate 6 is provided on the side of the bamboo book component 21 away from the carrier 4. Using a scraper 7, a non-Newtonian fluid material is scraped and coated on the mesh plate 6, and the non-Newtonian fluid material is filled into multiple groups of holes 211 of the bamboo book component 21 through the holes of the mesh plate 6.

[0101] When the non-Newtonian fluid material has the ability of photocuring, a photoinitiator is also filled into multiple groups of holes 211 of the bamboo book component 21. For example, the non-Newtonian fluid material and the photoinitiator can be mixed as the filling material, and the mixed filling material is filled into multiple groups of holes 211 of the bamboo book component 21.

[0102] Refer to Figure 9 , a mask plate 8 with a via hole 80 is provided on the bamboo book component 21. The via hole 80 of the mask plate 8 exposes the first group of holes 211a, and the mask plate 8 covers the second group of holes 211b.

[0103] Then, continue to refer to Figure 9 , using light with a first light intensity, irradiate the filling material in the first group of holes 211a through the via hole 80 of the mask plate 8 to cure the filling material in the first group of holes 211a.

[0104] Refer to Figure 10 , remove the mask plate 8, and use light with a second light intensity to irradiate the filling material in the second group of holes 211b to cure the filling material in the second group of holes 211b.

[0105] It can be understood that the second light intensity is not equal to the first light intensity. For example, the first light intensity is greater than the second light intensity. Since the greater the light intensity, the greater the flexural modulus of the cured filling material, therefore, after light treatment, the flexural modulus of the filling material cured in the first group of holes 211a is larger, and the flexural modulus of the filling material cured in the second group of holes 211b is smaller. The flexural moduli of the filling materials cured in different groups of holes 211 are different, and the adjustable range of the flexural modulus is between 0.1 MPa and 1 GPa, so as to adapt to the pattern design of the bamboo book component 21, realize the real-time "variable" bamboo book solution, and meet the bending requirements of the folding screen device 1 equipped with the bamboo book component 21.

[0106] And, refer to Figure 10 , after removing the mask plate 8, the first group of holes 211a will be exposed. During the process of using light with a second light intensity to irradiate the filling material in the second group of holes 211b, the light with a second light intensity will also irradiate the filling material in the first group of holes 211a. However, since the filling material in the first group of holes 211a has been cured and the second light intensity is less than the first light intensity, therefore, the light with a second light intensity irradiating the filling material in the first group of holes 211a will not affect the flexural modulus of the filling material in the first group of holes 211a.

[0107] In addition, in the case where each set of holes 211 includes multiple holes 211, the light intensity of the multiple holes 211 in the same set that are subjected to light treatment is the same, and the flexural modulus of the filling material in the multiple holes 211 in the same set is the same after curing.

[0108] Figure 11 This is a structural diagram of another bamboo book component provided by an embodiment of the present application.

[0109] See Figure 11 , the bamboo book component 21 includes a first set of holes 211a, a second set of holes 211b, a third set of holes 211c, and a fourth set of holes 211d. Along the direction X, the first set of holes 211a, the second set of holes 211b, the third set of holes 211c, and the fourth set of holes 211d are arranged in sequence.

[0110] Please continue to see Figure 11 , the flexural modulus of the filling material 212 in the first set of holes 211a, the second set of holes 211b, the third set of holes 211c, and the fourth set of holes 211d decreases in sequence. By setting different flexural moduli of the filling material 212 in more sets of holes, the pattern design of the bamboo book component 21 can be better adapted, and a real-time "variable" bamboo book solution can be realized to meet the bending requirements of the folding screen device 1 equipped with the bamboo book component 21.

[0111] Exemplarily, the filling material 212 in the first set of holes 211a, the second set of holes 211b, and the third set of holes 211c has all been subjected to light treatment, and the filling material 212 in the fourth set of holes 211d has not been subjected to light treatment.

[0112] Moreover, the light intensity of the light treatment received by the filling material 212 in the first set of holes 211a, the second set of holes 211b, and the third set of holes 211c decreases in sequence, so that the flexural modulus of the filling material 212 in the first set of holes 211a, the second set of holes 211b, and the third set of holes 211c decreases in sequence, and the flexural modulus of the filling material 212 in the third set of holes 211c is greater than the flexural modulus of the filling material 212 in the fourth set of holes 211d. Therefore, the flexural modulus of the filling material 212 in the first set of holes 211a, the second set of holes 211b, the third set of holes 211c, and the fourth set of holes 211d decreases in sequence.

[0113] Exemplarily, the first set of holes 211a, the second set of holes 211b, the third set of holes 211c, and the fourth set of holes 211d have all been subjected to light treatment, and the light intensity of the light treatment received by the filling material 212 in the first set of holes 211a, the second set of holes 211b, the third set of holes 211c, and the fourth set of holes 211d decreases in sequence, so that the flexural modulus of the filling material 212 in the first set of holes 211a, the second set of holes 211b, the third set of holes 211c, and the fourth set of holes 211d decreases in sequence.

[0114] In some embodiments, seeFigure 11 The bent portion 210 of the bamboo book component 21 also has a bending axis E. For example, the bending axis E extends along the direction Y. Figure 11 different from Figure 6 the designed position of the bending axis E in [reference], it can be understood that the designed position of the bending axis E is related to the morphology of the bamboo book component 21 after bending, and different designed positions can meet different bending requirements.

[0115] Please continue to refer to Figure 11 the distances between the first group of holes 211a, the second group of holes 211b, the third group of holes 211c, and the fourth group of holes 211d and the bending axis E decrease in sequence, and the first group of holes 211a, the second group of holes 211b, the third group of holes 211c, and the fourth group of holes 211d gradually approach the bending axis E.

[0116] It can be understood that the flexural moduli of the fillers 212 in the first group of holes 211a, the second group of holes 211b, the third group of holes 211c, and the fourth group of holes 211d decrease in sequence. By setting the first group of holes 211a, the second group of holes 211b, the third group of holes 211c, and the fourth group of holes 211d to gradually approach the bending axis E, the flexural modulus of the filler 212 in the hole closer to the bending axis E is smaller, which is beneficial to the bending of the bent portion 210 of the bamboo book component 21.

[0117] The embodiment of the present application also provides Figure 11 the preparation method of the bamboo book component in [reference], Figures 12 to 15 which is another step diagram for preparing the bamboo book component provided by the embodiment of the present application.

[0118] The preparation method of the bamboo book component 21 includes the following steps:

[0119] Refer to Figure 12 On the bent portion 210 of the bamboo book component 21, form the first group of holes 211a, the second group of holes 211b, the third group of holes 211c, and the fourth group of holes 211d. Along the direction X, the first group of holes 211a, the second group of holes 211b, the third group of holes 211c, and the fourth group of holes 211d are arranged in sequence.

[0120] Refer to Figure 13 Place the bamboo book component 21 on the carrier 4. For example, the bamboo book component 21 can be adhered to the carrier 4 to fix the bamboo book component 21. Then, the non-Newtonian fluid material can be filled into the first group of holes 211a, the second group of holes 211b, the third group of holes 211c, and the fourth group of holes 211d by the spraying or scraping method described above.

[0121] Refer to Figure 14 On the bamboo book component 21, set a mask plate 9. The mask plate 9 does not have through holes and can transmit light.

[0122] Then, a coating 10 is provided on the surface of the mask 9 on the side away from the bamboo book assembly 21. The coating 10 is above the multiple groups of holes, and the thickness of the part of the coating 10 above different groups of holes is different.

[0123] Exemplarily, the coating 10 is not provided above the first group of holes 211a, and the coating 10 is provided above the second group of holes 211b, the third group of holes 211c, and the fourth group of holes 211d, and the thickness of the coating 10 above the second group of holes 211b, the third group of holes 211c, and the fourth group of holes 211d increases in sequence.

[0124] Exemplarily, the coating 10 is provided above the first group of holes 211a, the second group of holes 211b, the third group of holes 211c, and the fourth group of holes 211d, and the thickness of the coating 10 above the first group of holes 211a, the second group of holes 211b, the third group of holes 211c, and the fourth group of holes 211d increases in sequence.

[0125] The coating 10 can be an acrylate coating, an epoxy coating, a polyurethane coating, etc., and an ultraviolet absorber or a phosphor is further added to the coating 10. The ultraviolet absorber can include inorganic nano-oxides (for example, nano-titanium dioxide) or benzotriazoles, etc. The ultraviolet absorber and the phosphor can absorb ultraviolet rays and reduce the transmittance of ultraviolet rays through the coating 10.

[0126] See Figure 15 , ultraviolet rays are used, and the ultraviolet rays irradiate the filling materials in the first group of holes 211a, the second group of holes 211b, the third group of holes 211c, and the fourth group of holes 211d through the coating 10 and the mask 9.

[0127] It can be understood that the thickness of the part of the coating 10 above the first group of holes 211a, the second group of holes 211b, the third group of holes 211c, and the fourth group of holes 211d increases in sequence. The thicker the part of the coating 10, the more ultraviolet rays it absorbs, and the lower the transmittance of ultraviolet rays through this part of the coating 10, so that the light intensity of the filling materials in the first group of holes 211a, the second group of holes 211b, the third group of holes 211c, and the fourth group of holes 211d irradiated by light decreases in sequence.

[0128] Since the greater the light intensity, the greater the flexural modulus of the filling material after curing, therefore, after the filling material is irradiated by light and cured, the flexural modulus of the filling materials in the first group of holes 211a, the second group of holes 211b, the third group of holes 211c, and the fourth group of holes 211d decreases in sequence. The flexural moduli of the filling materials in different groups of holes after curing are different to adapt to the pattern design of the bamboo book assembly 21, realizing a real-time "variable" bamboo book solution and meeting the bending requirements of the folding screen device 1 equipped with the bamboo book assembly 21.

[0129] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims described above.

Claims

1. A bamboo book component, characterized in that, The bamboo book component is used to support the display screen; The bamboo book component includes a bent portion, and a plurality of groups of holes are provided in the bent portion; Fillers are arranged in the plurality of groups of holes, and the material of the fillers includes non-Newtonian fluid materials.

2. The bamboo book component according to claim 1, characterized in that The non-Newtonian fluid material includes polyborodimethylsiloxane.

3. The bamboo book component according to claim 1 or 2, characterized in that The non-Newtonian fluid material includes modified polyborodimethylsiloxane; The molecular structure of the modified polyborodimethylsiloxane includes a photosensitive group.

4. The bamboo book component according to any one of claims 1 to 3, characterized in that, The material of the filler further includes a photosensitive initiator, and the photosensitive initiator includes at least one of a cationic initiator or a radical initiator; The cationic initiator includes at least one of arene iron salts, diaryliodonium salts, triarylsulfonium salts, iodonium salts or platinum-based catalysts; the radical initiator includes ketones.

5. The bamboo book component according to claim 4, characterized in that, After the filler is subjected to light treatment, the flexural modulus of the filler becomes larger.

6. The bamboo book component according to claim 4 or 5, characterized in that The plurality of groups of holes include a first group of holes and a second group of holes, and the flexural modulus of the filler in the first group of holes is greater than the flexural modulus of the filler in the second group of holes.

7. The bamboo book component according to claim 6, wherein The flexural modulus of the filler in the first group of holes is greater than the flexural modulus of the filler in the second group of holes, wherein the filler in the first group of holes is subjected to light treatment, and the filler in the second group of holes is not subjected to light treatment.

8. The bamboo book component according to claim 6, wherein, The flexural modulus of the filler in the first group of holes is greater than the flexural modulus of the filler in the second group of holes, and the light intensity of the light treatment received by the filler in the first group of holes is greater than the light intensity of the light treatment received by the filler in the second group of holes.

9. The bamboo book component according to any one of claims 6 to 8, characterized in that, The bent portion of the bamboo book component has a bending axis, and the second group of holes is closer to the bending axis than the first group of holes.

10. A display module, characterized in that, Comprising: A display screen, and The bamboo book component according to any one of claims 1 to 9, wherein the bamboo book component is arranged on the light-emitting surface side away from the display screen.

11. An electronic device, characterized in that, Comprising: A housing and the display module according to claim 10, wherein the display module is arranged on the housing.

12. A preparation method of a bamboo book component, characterized in that, The bamboo book component is used to support the display screen; The preparation method includes: Forming a plurality of groups of holes on the bent portion of the bamboo book component; Filling non-Newtonian fluid materials into the plurality of groups of holes.

13. The preparation method according to claim 12, characterized in that, The plurality of groups of holes include a first group of holes and a second group of holes; After filling non-Newtonian fluid materials into the plurality of groups of holes, the preparation method further includes: Providing a mask plate with vias on the bamboo book component, the vias of the mask plate expose the first group of holes, and the mask plate covers the second group of holes; Using light with a first light intensity to irradiate the non-Newtonian fluid material in the first group of holes through the vias of the mask plate.

14. The preparation method according to claim 13, characterized in that, After using light with a first light intensity to irradiate the non-Newtonian fluid material in the first group of holes, The preparation method further includes: Removing the mask plate; Using light with a second light intensity to irradiate the non-Newtonian fluid material in the second group of holes, and the first light intensity is greater than the second light intensity.

15. The preparation method according to claim 12, characterized in that, The plurality of groups of holes include a first group of holes and a second group of holes; After filling non-Newtonian fluid materials into the plurality of groups of holes, the preparation method further includes: Providing a mask plate on the bamboo book component; A coating is provided on the mask plate, and the thickness of the part of the coating above the first set of holes is less than the thickness of the part of the coating above the second set of holes; Light is used to irradiate the non-Newtonian fluid material in the multiple sets of holes through the coating and the mask plate.

16. The preparation method according to any one of claims 12 to 15, characterized in that, Before filling the non-Newtonian fluid material into the multiple sets of holes, the preparation method further includes: Placing the bamboo book assembly on the light-emitting surface side away from the display screen, and the multiple sets of holes are located on the surface of the bamboo book assembly away from the display screen; or, Placing the bamboo book assembly on a substrate, and the multiple sets of holes are located on the surface of the bamboo book assembly away from the substrate.

17. The preparation method according to any one of claims 12 to 16, characterized in that, Filling the non-Newtonian fluid material into the multiple sets of holes includes: Spraying the non-Newtonian fluid material into the multiple sets of holes, or scraping the non-Newtonian fluid material into the multiple sets of holes.

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