CN113129748A - Foldable protective film, foldable display screen and foldable electronic equipment - Google Patents
Foldable protective film, foldable display screen and foldable electronic equipment Download PDFInfo
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- CN113129748A CN113129748A CN202110368723.7A CN202110368723A CN113129748A CN 113129748 A CN113129748 A CN 113129748A CN 202110368723 A CN202110368723 A CN 202110368723A CN 113129748 A CN113129748 A CN 113129748A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The application relates to the technical field of display, specifically provides a collapsible protection film, collapsible display screen and collapsible electronic equipment, and this collapsible protection film includes: a base film layer; the deposition layer is arranged on one side of the base film layer and is integrated with the base film layer into a whole; wherein, the material of the base film layer comprises a polymer material, and the material of the deposition layer comprises a polymer-carbon composite material formed by carbon ion implantation of the polymer material. Through the mode, the impact resistance of the display screen with the foldable protective film can be improved.
Description
Technical Field
The application relates to the technical field of display, in particular to a foldable protective film, a foldable display screen and a foldable electronic device.
Background
The foldable terminal equipment can meet the requirement of a user on the large size of the screen, and can avoid the problem of inconvenience in carrying caused by the large size of the screen, so that the foldable terminal equipment is widely favored by the user. In the related art, the foldable terminal device generally includes a flexible display, but the existing foldable display is relatively flexible, and the surface of the foldable display has poor impact resistance and is easily damaged.
Disclosure of Invention
The embodiment of the application provides a foldable protection film, a foldable display screen and a foldable electronic device, and can improve the shock resistance of the display screen with the foldable protection film.
The embodiment of the application provides a collapsible protection film, includes: a base film layer; the deposition layer is arranged on one side of the base film layer and is integrated with the base film layer into a whole; wherein, the material of the base film layer comprises a polymer material, and the material of the deposition layer comprises a polymer-carbon composite material formed by carbon ion implantation of the polymer material.
The embodiment of the application further provides a manufacturing method of the foldable protective film, and the method comprises the following steps: preparing a base film layer, wherein the material of the base film layer comprises a polymer material; and performing carbon ion implantation on the predetermined area of the base film layer to convert the polymer material with at least partial thickness of the base film layer in the predetermined area into a polymer-carbon composite material to form a deposition layer integrated with the base film layer.
The embodiment of the present application further provides a foldable display screen, including: a flexible display panel; and the protective film is a foldable protective film or a foldable protective film prepared by the method, and covers the display surface of the flexible display panel.
An embodiment of the present application further provides a foldable electronic device, including: a housing; the foldable display screen is arranged on the shell and is the foldable display screen.
Be different from prior art, this application embodiment carries out carbon ion implantation through the polymer material to the basement rete, makes basement rete one side form polymer-carbon composite's sedimentary deposit, strengthens and surface wear resistance strengthens the sedimentary deposit of characteristics such as through forming to demonstrate hardness, shock resistance strengthens and surface wear resistance strengthens, can realize improving the shock resistance and the surface wear resistance of collapsible protection film under the prerequisite that keeps the collapsible characteristic of basement rete, and the brittleness of collapsible protection film has also been improved, and young's modulus reduces.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural diagram of an electronic device in an unfolded state according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of an electronic device in a folded state according to an embodiment of the present application.
FIG. 3 is a schematic view of a first configuration of the foldable display screen of FIG. 1;
FIG. 4 is a schematic view of a first configuration of the foldable protective film shown in FIG. 3;
FIG. 5 is a second schematic view of the foldable protective film shown in FIG. 3;
FIG. 6 is a schematic view of a third structure of the foldable protection film shown in FIG. 3;
FIG. 7 is a second schematic view of the foldable display screen of FIG. 1;
FIG. 8 is a schematic diagram of a third configuration of the foldable display screen of FIG. 1;
FIG. 9 is a fourth schematic diagram of the foldable display screen of FIG. 1;
FIG. 10 is a fifth structural schematic view of the foldable display screen of FIG. 1;
FIG. 11 is a sixth schematic view of the foldable display screen of FIG. 1;
FIG. 12 is a seventh schematic view of the foldable display screen of FIG. 1;
fig. 13 is a schematic flow chart of a method for manufacturing a foldable protective film according to an embodiment of the present disclosure;
FIG. 14 is a schematic flow chart of carbon ion implantation of FIG. 13;
fig. 15 is a flowchart illustrating step S10 in fig. 13.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a foldable electronic device in an unfolded state according to an embodiment of the present disclosure. The foldable electronic device 10 of fig. 1 may be, but is not limited to, a foldable cell phone, a foldable tablet computer, a foldable Personal Digital Assistant (PDA), a foldable e-book reader, a foldable MP3 player, a foldable MP4 player, a foldable wearable device, a foldable navigator, a foldable handheld game console, etc. the foldable electronic device 10 of fig. 1 includes a housing 100 and a foldable display screen 200.
The foldable display 200 is used for displaying pictures. The foldable display screen 200 may have a regular shape, such as a rectangular parallelepiped structure or a rounded rectangular structure, and the foldable display screen 200 may also have an irregular shape. The foldable Display 200 may be implemented by a flexible Organic Light Emitting Diode (OLED), a flexible Liquid Crystal Display (LCD), a flexible Active Matrix Organic Light Emitting Diode (AMOLED), or other types of foldable Display 200.
Preferably, the foldable display screen 200 can adopt an AMOLED display screen, and the AMOLED display screen is a self-luminous display screen without a backlight module. Therefore, when the substrate in the AMOLED display screen is made of a flexible resin material, such as polyethylene terephthalate (PET), the AMOLED display screen can have a bendable characteristic.
The housing 100 is used to form an outer contour of the electronic device, and the foldable display screen 200 is disposed on the housing 100. The housing 100 may be formed from plastic, glass, ceramic, fiber composite, metal (e.g., stainless steel, aluminum, etc.), other suitable materials, or a combination of any two or more of these materials. The shell 100 may be formed using a one-piece configuration in which some or all of the shell 100 is machined or molded as a single structure, or may be formed using multiple structures (e.g., an inner frame structure, one or more structures that form an outer shell surface, etc.).
The housing 100 may be a foldable housing 100, and specifically, the foldable housing 100 includes a middle frame and a decoration ring, the foldable display screen 200 is disposed on the middle frame, the decoration ring is disposed on the middle frame, and an inner edge of the decoration ring is disposed around the foldable display screen 200 and is overlapped on the foldable display screen 200.
Referring to fig. 1 and fig. 2, fig. 2 is a schematic structural diagram of a foldable electronic device in a folded state according to an embodiment of the present application, and the foldable electronic device 10 includes a bendable portion and a non-bendable portion. Such as a bendable portion, connected between two non-bendable portions, and the two non-bendable portions can be bent by the bendable portion to switch between the bent state and the unfolded state of the foldable electronic device 10. Thus, when the foldable electronic device 10 is in a folded state (as shown in fig. 2), the occupied space of the foldable electronic device 10 can be made smaller, thereby facilitating the carrying and storage of the foldable electronic device 10; when the foldable electronic device 10 is in the unfolded state (as shown in fig. 1), the foldable electronic device 10 can have a larger display area 300, thereby facilitating the operation and reading of the foldable electronic device 10 by the user. It should be noted that the bendable portion of the foldable electronic device 10 may have one bending direction, i.e. may be bent in one direction; the bendable portion of the foldable electronic device 10 may have two bending directions, i.e., may be bent in two directions.
As shown in fig. 3, fig. 3 is a first structural schematic diagram of the foldable display screen shown in fig. 1. The foldable display screen 200 of the embodiment of the present application may include a flexible display panel 210.
The flexible display panel 210 may include a display substrate and an encapsulation material, between which an organic light emitter is encapsulated; the liquid crystal material can be packaged between the display substrate and the packaging material, the main board of the foldable electronic device 10 provides voltage for the liquid crystal material, so that the arrangement direction of liquid crystal molecules is changed, and light projected by the backlight module forms images in the display area after the light is jointly acted by the interior of the display panel 300, so as to display pictures. The flexible display panel 210 may include a display surface 300 and a non-display surface, and the display surface 300 of the flexible display panel 210 and the non-display surface of the flexible display panel 210 may be disposed opposite to each other.
With continued reference to fig. 3, the foldable display screen 200 may further include a protective film 220. The protection film 220 in the embodiment of the present application may be a foldable protection film 220, and the protection film 220 is used to cover the display surface 300 of the flexible display panel 210, so as to protect the surface of the flexible display panel 210 from being scratched.
As shown in fig. 3, the flexible display panel 210 includes an un-bending region 211 and a bending region 212, and the bending region 212 is in a bending state when the flexible display panel 210 is in a folding state. It should be noted that, the flexible display panel 210 may include a folding mode and a folding mode, and in the folding state, when the non-bending region 211 of the flexible display panel 210 is opposite, the flexible display panel 210 is in the folding state; when the non-bending regions 211 of the flexible display panel 210 are away from each other, the flexible display panel 210 is in a folded-out state.
The foldable protective film 220 includes a non-bent portion 221 and a bent portion 222. Specifically, the non-bending portion 221 is used to cover the non-bending region 211, so as to protect the non-bending region 211 of the flexible display panel 210 and prevent the display surface 300 of the non-bending region 211 of the flexible display panel 210 from being scratched.
As shown in fig. 3, the bent portion 222 is used to cover the bent region 212, and the non-bent portion 221 is connected to both sides of the central axis of the bent portion 222. In the extending direction of the bent portion 222, a straight line passing through the geometric center of the bent portion 222 may be defined as a central axis of the bent portion 222 (for example, "a-b" shown in fig. 4, fig. 4 is a first structural schematic diagram of the foldable protection film shown in fig. 3), the bent portion 222 may be bent around the central axis, and the non-bent portion 221 is connected to two sides of the central axis of the bent portion 222, so that when the electronic device is folded, the non-bent portion 221 may be turned around the central axis, so that the non-bent portion 221 and the non-bent region 211 keep a synchronous motion state, and the non-bent portion 221 may be always attached to and cover the non-bent region 211, so as to protect the non-bent region 211 from being scratched.
Specifically, as shown in fig. 4, the non-bending portion 221 is connected to two sides of the central axis of the bending portion 222, when the user folds the electronic device, the user operates the non-bending region 211 to rotate around the bending region 212, accordingly, the non-bending portion 221 covering the non-bending region 211 rotates around the bending portion 222, in the process, the non-bending portion 221 and the non-bending region 211 move synchronously, the bending portion 222 and the bending region 212 move synchronously, and when the electronic device is in a folded state, the non-bending portions 221 located at two sides of the bending portion 222 are separated from each other.
When a user unfolds the electronic device, the user operates the non-bending region 211 to rotate around the bending region 212, accordingly, the non-bending part 221 covering the non-bending region 211 rotates around the bending part 222, in the process, the non-bending part 221 and the non-bending region 211 move synchronously, the bending part 222 and the bending region 212 move synchronously, and when the electronic device is in an unfolded state, the non-bending region 211 and the bending region 212 are in the same plane, and the non-bending part 221 and the bending part 222 are connected smoothly to cover a display screen in the unfolded state.
As shown in fig. 5, fig. 5 is a second structural schematic diagram of the foldable protection film shown in fig. 3, and the foldable protection film 220 of the embodiment of the present application includes: a base film layer 223 and a deposition layer 224, the deposition layer 224 being disposed on one side of the base film layer 223 and having an integral structure with the base film layer 223.
The material of the base film layer 223 includes a polymer material, and the polymer material may include polyolefin, polyamide, polyester, polyacrylic, polystyrene, a copolymer thereof, or a combination thereof. The material of the deposition layer 224 includes a polymer-carbon composite formed by carbon ion implantation of a polymer material.
The carbon ion implantation process may be performed by low energy implantation. The energy of the carbon ion implantation should be based on the actual material and thickness of the base film layer 223, and the dosage of the carbon ion implantation should be based on the doped carbon content of the deposition layer 224 to be formed or the hardness of the deposition layer 224.
The elemental composition on the surface of the base film layer 223 is changed after the carbon ion implantation, the ionization energy loss of the implanted ions in the polymer material enables the molecular chains on the surface of the base film layer 223 to simultaneously generate complex processes such as cracking, reconstruction and crosslinking, free hydrogen atoms are combined to generate hydrogen and released from the surface, the hydrogen content on the surface of the base film layer 223 is reduced, active bonds generated after the carbon ion implantation are crosslinked with each other, chain-shaped molecules form a macromolecular net structure, meanwhile, carbon aggregation and carbide particle deposition occur on the surface of the base film layer 223, and finally, a deposition layer 224 of a polymer-carbon composite material is formed on the surface of the base film layer 223, and the deposition layer 224 has the characteristics of enhanced hardness, enhanced impact resistance and enhanced surface wear resistance.
In some embodiments, the hardness of the deposited layer 224 is 5-7H (Brinell hardness).
Different from the prior art, in the embodiment of the present application, carbon ion implantation is performed on the polymer material of the base film layer 223, so that a deposition layer 224 of a polymer-carbon composite material is formed on one side of the base film layer 223, and the deposition layer 224 exhibiting characteristics of hardness enhancement, impact resistance enhancement, surface wear resistance enhancement and the like is formed, so that the impact resistance and the surface wear resistance of the foldable protection film 220 can be improved on the premise of maintaining the foldable characteristic of the base film layer 223; further, the impact resistance and surface abrasion resistance of the foldable display screen 200 using the foldable protective film 220 can be improved, and the brittleness and Young's modulus of the foldable protective film 220 are also improved and reduced.
In some embodiments, the polymer material comprises a polyester material and/or a modified polyester material, and the polymer-carbon composite comprises a polyester-carbon composite and/or a modified polyester-carbon composite.
The polyester material may include polymethylmethacrylate (PMMA, also known as acryl), thermoplastic polyurethane elastomer rubber (TPU), thermoplastic polyester elastomer (TPEE), polyethylene terephthalate (PET), Polycarbonate (PC), Polyurethane (PU), copolymers thereof, or combinations thereof.
Preferably, the polyester material may comprise polymethylmethacrylate or a thermoplastic polyurethane elastomer rubber.
The modified polyester material can be an organic silicon modified polyester material or a polyester material modified by adding an ultraviolet blue light absorber. It is understood that the silicone modification can reduce the coefficient of friction of the surface of the polyester-based film layer 223 and improve the stress of the surface of the polyester-based film layer 223, increasing the surface finish of the polyester-based film layer 223. And adding an ultraviolet blue light absorbent for modification to obtain the polyester-based film 223 with blue light resistance and ultraviolet resistance.
As shown in fig. 6, fig. 6 is a third schematic structural diagram of the foldable protection film shown in fig. 3, the foldable protection film 220 of the embodiment of the present application further includes a transparent support layer 225 disposed on a side of the base film layer 223 far from the deposition layer 224, the transparent support layer 225 has a certain rigidity, and can provide a support function for the base film layer 223, so as to improve the flatness of the entire surface of the base film layer 223, and when the foldable display screen 200 is in a fully unfolded state or a folded state, both the non-bending portion 221 and the bending portion 222 of the foldable protection film 220 have a higher flatness, thereby avoiding affecting the image display of the foldable display screen 200 and the operation of the foldable display screen 200 by a user.
Specifically, the material of the transparent support layer 225 may be Ultra Thin Glass (UTG) or Thin Glass. More preferably, the material of the transparent support layer 225 may be ultra-thin flexible glass, which can be bent, folded and curled, and has the characteristics of foldability, good flexibility, high hardness and wear resistance.
In some embodiments, the light transmittance of the base film layer 223, the deposition layer 224, and the transparent support layer 225 is above 90%.
As shown in fig. 7, fig. 7 is a second structural schematic diagram of the foldable display screen shown in fig. 1. The foldable display screen 200 of the embodiment of the application may further include a polarizer 226, and the polarizer 226 is disposed between the flexible display panel 210 and the protection film 220. The polarizer 226 may be made of polyvinyl alcohol (PVA) material, for example, the polarizer 226 may be a polyvinyl alcohol film made of PVA material. The number of the polarizers 226 may be one, and one polarizer 226 may be disposed on the display surface 300 of the flexible display panel 210. Of course, a polarizer 226 may also be disposed on the non-display surface of the flexible display panel 210. It should be noted that the number of the polarizers 226 may also be multiple, for example, two polarizers 226, three polarizers 226, or other numbers of polarizers 226, and the number of the polarizers 226 may be set according to practical situations, which is not limited in this embodiment of the application.
Fig. 8 is a schematic diagram of a third structure of the foldable display screen shown in fig. 1, as shown in fig. 8. The flexible display panel 210 of the embodiment of the present application may include a display module 213 and a capacitive fingerprint sensor membrane 214. The capacitive fingerprint sensor film 214 is located on one side of the display module 213 close to the protection film 220, and the capacitive fingerprint sensor film 214 covers the display surface 300 of the display module 213 to sense the fingerprint of the user touching the protection film 220. The polarizer 226 is disposed between the capacitive fingerprint sensor film 214 and the protective film 220, and the polarizer 226 is used to reduce the brightness of the incident light from the protective film 220 to the capacitive fingerprint sensor film 214, so as to reduce the appearance of the flexible display panel 210, which is caused by the reflection of grid wires (especially metal grid wires) on the capacitive fingerprint sensor film 214, from having a certain angle of color difference.
As shown in fig. 9, fig. 9 is a fourth structural schematic diagram of the foldable display screen shown in fig. 1. The flexible display panel 210 according to the embodiment of the application may include an upper polarizer 215, a color filter substrate 216, a TFT substrate 217, an induction coil 218, and a lower polarizer 219, which are sequentially stacked, where the induction coil 218 is disposed between the TFT substrate 217 and the lower polarizer 219, and the protection film 220 is disposed on one side of the upper polarizer 215 away from the color filter substrate 216.
As shown in fig. 10, fig. 10 is a fifth structural schematic diagram of the foldable display screen shown in fig. 1. The flexible display panel 210 of the embodiment of the application may include an upper polarizer 215, a color filter substrate 216, a TFT substrate 217, a lower polarizer 219, an induction coil 218, and a backlight module (not shown) that are sequentially stacked. That is, the induction coil 218 is disposed between the lower polarizer 219 and the backlight module, so that electromagnetic interference of the induction coil 218 to the base film layer 223 and the driver IC on the TFT substrate 217 can be reduced.
As shown in fig. 11, fig. 11 is a sixth structural schematic diagram of the foldable display screen shown in fig. 1. A transparent filling glue layer 230 is filled between the flexible display panel 210 and the protection film 220 in the embodiment of the application.
The transparent adhesive layer 230 may be, for example, OCA optical adhesive, which is a special adhesive for bonding transparent optical elements, and has the characteristics of being colorless and transparent, having a light transmittance of 90% or more, having good bonding strength, being curable at room temperature or at intermediate temperature, and the like.
As shown in fig. 12, fig. 12 is a seventh structural schematic view of the foldable display screen shown in fig. 1. In the embodiment of the application, the polarizer 226 may be bonded to the protective film 220 and the flexible display panel 210 by using the transparent filling adhesive layer 230, and the transparent filling adhesive layer 230 may be made of an oca (optical Clear adhesive) optical adhesive material or other adhesive layer materials.
Referring to fig. 13, fig. 13 is a schematic flow chart of a method for manufacturing a foldable protection film according to an embodiment of the present application, where the method is used to manufacture the foldable protection film 220 in the foregoing embodiment, and specifically includes the following steps:
s10: the base film layer 223 is prepared, wherein the material of the base film layer 223 includes a polymer material.
In particular, the polymeric material may include a polyolefin, a polyamide, a polyester, a polyacrylic, a polystyrene, copolymers thereof, or combinations thereof.
Preferably, the polymeric material comprises a polyester material and/or a modified polyester material. The polyester material may include polymethylmethacrylate (PMMA, also known as acryl), thermoplastic polyurethane elastomer rubber (TPU), thermoplastic polyester elastomer (TPEE), polyethylene terephthalate (PET), Polycarbonate (PC), Polyurethane (PU), copolymers thereof, or combinations thereof. The modified polyester material can be an organic silicon modified polyester material or a polyester material modified by adding an ultraviolet blue light absorber.
More preferably, the polyester material may comprise polymethylmethacrylate or a thermoplastic polyurethane elastomer rubber.
S20: carbon ion implantation is performed on a predetermined region of the base film layer 223 to convert at least a partial thickness of the polymer material of the base film layer 223 within the predetermined region into a polymer-carbon composite material, forming the deposition layer 224 as an integral structure with the base film layer 223.
Specifically, the polymer material of the base film layer 223 of the entire thickness in the predetermined region may be converted into the polymer-carbon composite, in which case the thickness of the base film layer 223 in the predetermined region is 0; alternatively, the polymer material of the base film layer 223 of a partial thickness within the predetermined region may be converted into a polymer-carbon composite, that is: at the time of the carbon ion implantation, the entire polymer material in the predetermined region is not converted into the polymer-carbon composite material, and thus, a portion of the polymer material remains under the deposition layer 224 formed by the carbon ion implantation.
In this step, the carbon ion implantation process may be performed by low energy (for example, by using 0.5 to 5MeV energy or 60 to 80keV energy). The energy of the carbon ion implantation should be based on the actual material and thickness of the base film layer 223, and the dosage of the carbon ion implantation should be based on the doping ion concentration of the polymer-carbon composite material to be formed or the hardness of the deposition layer 224.
First, the predetermined region is a region of the base film layer 223 where the polymer-carbon composite material is to be formed. Secondly, the depth of the carbon ion implantation can be set according to actual conditions.
The elemental composition on the surface of the base film layer 223 is changed after the carbon ion implantation, the ionization energy loss of the implanted ions in the polymer material enables the molecular chains on the surface of the base film layer 223 to simultaneously generate complex processes such as cracking, reconstruction and crosslinking, free hydrogen atoms are combined to generate hydrogen and released from the surface, the hydrogen content on the surface of the base film layer 223 is reduced, active bonds generated after the carbon ion implantation are crosslinked with each other, chain-shaped molecules form a macromolecular net structure, meanwhile, carbon aggregation and carbide particle deposition occur on the surface of the base film layer 223, and finally, a deposition layer 224 of a polymer-carbon composite material is formed on the surface of the base film layer 223, and the deposition layer 224 has the characteristics of enhanced hardness, enhanced impact resistance and enhanced surface wear resistance.
In some embodiments, the hardness of the deposited layer 224 is 5-7H (Brinell hardness).
Different from the prior art, the embodiment of the present application performs carbon ion implantation on the polymer material of the base film layer 223, so that a deposition layer 224 of a polymer-carbon composite material is formed on one side of the base film layer 223, and the deposition layer 224 presenting characteristics of hardness enhancement, impact resistance enhancement, surface wear resistance enhancement and the like is formed, so that the impact resistance and the surface wear resistance of the foldable protection film 220 can be improved on the premise of maintaining the foldable characteristic of the base film layer 223.
Referring to fig. 14, fig. 14 is a schematic flow chart of carbon ion implantation in fig. 13, wherein the carbon ion implantation in step S20 specifically includes the following steps:
s21: under vacuum conditions, a carbon ion-implanted raw material is ionized to generate an ion beam.
S22: ions are accelerated and implanted into the base film layer 223.
The base film layer 223 is placed on a sample table of a vacuum chamber, after the vacuum chamber is vacuumized, the sample table of the vacuum chamber slowly rotates along the axis of the sample table at a constant speed, and simultaneously, an ion implanter is used for implanting carbon ions into the polymer material. Wherein the raw material for carbon ion implantation comprises CxHy +Or C+And x and y are integers not less than 1.
Referring to fig. 15, fig. 15 is a schematic flowchart illustrating the step S10 in fig. 13, where the step S10 specifically includes the following steps:
s11: a transparent support layer 225 is provided.
Specifically, the material of the transparent support layer 225 may be Ultra Thin Glass (UTG) or Thin Glass. More preferably, the material of the transparent support layer 225 may be ultra-thin flexible glass, which can be bent, folded and curled, and has the characteristics of foldability, good flexibility, high hardness and wear resistance.
S12: a base film layer 223 is formed on one side of the transparent support layer 225.
Specifically, the base film layer 223 may be formed by applying a polymer material solution on one side of the transparent support layer 225 and then curing the solution to form a film, or the base film layer 223 may be formed on one side of the transparent support layer 225 by a plasma CVD method, a sputtering method, or the like.
The present inventors formed a TPU layer on one side of an ultra-thin glass to obtain a substrate, processed the substrate into a sheet-like sample (wherein the ultra-thin glass has a size of 15cm × 8cm × 0.5mm, and the TPU layer has a size of 15cm × 8cm × 0.5mm), and carried out on an ion implanterRow CH+Wherein the ion dose range is 1 × 1015ions/cm2The implantation energy range is 0.5-5 MeV. The abrasion loss (dry grinding state) of the surface of the flaky sample before and after ion implantation is measured on a dynamic and static friction abrasion tester, and the test shows that: after ion implantation, the surface wear resistance of the side of the sheet sample, which is far away from the ultrathin glass, is enhanced by 47.5 times, the brittleness of the foldable protective film 220 is improved, and the Young modulus is reduced to 24 multiplied by 103GPa。
The foldable protective film, the foldable display screen and the foldable electronic device provided by the embodiment of the application are described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (11)
1. A foldable protective film, comprising:
a base film layer;
the deposition layer is arranged on one side of the base film layer and is integrated with the base film layer into a whole;
wherein the material of the base film layer comprises a polymer material, and the material of the deposition layer comprises a polymer-carbon composite material formed by carbon ion implantation of the polymer material.
2. The foldable protective film of claim 1,
the polymer material comprises a polyester material and/or a modified polyester material;
the polymer-carbon composite includes a polyester-carbon composite and/or a modified polyester-carbon composite.
3. The foldable protective film of claim 1, further comprising:
and the transparent supporting layer is arranged on one side of the base film layer, which is far away from the deposition layer.
4. The foldable protective film according to claim 1, wherein the hardness of the deposited layer is 5-7H (brinell hardness).
5. A method of making a foldable protective film, the method comprising:
preparing a base film layer, wherein the material of the base film layer comprises a polymer material;
and performing carbon ion implantation on a preset area of the base film layer so as to convert the polymer material with at least partial thickness of the base film layer in the preset area into a polymer-carbon composite material and form a deposition layer integrated with the base film layer.
6. The method of claim 5, wherein the carbon ion implantation comprises:
ionizing a carbon ion-implanted raw material under a vacuum condition to generate an ion beam;
the ions are accelerated and the ion beam is implanted into the base film layer.
Wherein the raw material for carbon ion implantation comprises CxHy +And/or C+And x and y are integers not less than 1.
7. The method of claim 5, wherein the step of preparing the base film layer comprises:
providing a transparent supporting layer;
and forming the base film layer on one side of the transparent support layer.
8. A foldable display screen, comprising:
a flexible display panel;
a protective film being a foldable protective film according to any one of claims 1 to 4 or a foldable protective film made by the method of any one of claims 5 to 7, covering a display surface of the flexible display panel.
9. The foldable display of claim 8, further comprising:
and the polaroid is arranged between the flexible display panel and the protective film.
10. The foldable display screen of claim 8,
and a transparent filling adhesive layer is filled between the flexible display panel and the protective film.
11. A foldable electronic device, comprising:
a housing;
a foldable display screen disposed on the housing, the foldable display screen being as in any one of claims 8-10.
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| CN202110368723.7A CN113129748B (en) | 2021-04-06 | 2021-04-06 | Foldable protection film, foldable display screen and foldable electronic equipment |
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