CN113129748B - Foldable protection film, foldable display screen and foldable electronic equipment - Google Patents
Foldable protection film, foldable display screen and foldable electronic equipment Download PDFInfo
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- CN113129748B CN113129748B CN202110368723.7A CN202110368723A CN113129748B CN 113129748 B CN113129748 B CN 113129748B CN 202110368723 A CN202110368723 A CN 202110368723A CN 113129748 B CN113129748 B CN 113129748B
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Classifications
-
- 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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- Physics & Mathematics (AREA)
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The application relates to the technical field of display, and particularly provides a foldable protection film, a foldable display screen and foldable electronic equipment, wherein the foldable protection film comprises the following components: a base film layer; the deposition layer is arranged on one side of the base film layer and is of an integrated structure with the base film layer; 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. By 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 foldable electronic equipment.
Background
The foldable terminal device is popular with users because it can meet the requirement of users on the large size of the screen and avoid the problem of inconvenient carrying caused by the large size of the screen. In the related art, a foldable terminal device generally includes a flexible display screen, but the existing foldable display screen is soft, and the surface of the display screen has poor impact resistance and is easily damaged.
Disclosure of Invention
The embodiment of the application provides a foldable protective film, a foldable display screen and foldable electronic equipment, which can improve the shock resistance of the display screen with the foldable protective film.
An embodiment of the present application provides a foldable protective film, including: a base film layer; the deposition layer is arranged on one side of the base film layer and is of an integrated structure with the base film layer; 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 also provides a manufacturing method of the foldable protective film, which comprises the following steps: preparing a base film layer, wherein the material of the base film layer comprises a polymer material; and carrying out carbon ion implantation on the preset area of the base film layer so as to convert the polymer material with at least part of the thickness of the base film layer in the preset area into a polymer-carbon composite material, thereby forming a deposition layer which is integrated with the base film layer.
The embodiment of the application also provides a foldable display screen, which comprises: a flexible display panel; and the protective film is a foldable protective film or a foldable protective film prepared by the method, and the protective film covers the display surface of the flexible display panel.
The embodiment of the application also provides foldable electronic equipment, which comprises: a housing; the foldable display screen is arranged on the shell and is the foldable display screen.
Compared with the prior art, the embodiment of the application has the advantages that the polymer material of the base film layer is subjected to carbon ion implantation, so that the deposition layer of the polymer-carbon composite material is formed on one side of the base film layer, and the deposition layer with the characteristics of enhanced hardness, enhanced shock resistance, enhanced surface wear resistance and the like is formed, so that the shock resistance and the surface wear resistance of the foldable protective film can be improved on the premise of keeping the foldable characteristic of the base film layer, the brittleness of the foldable protective film is improved, and the Young modulus is reduced.
Additional aspects and advantages of the 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 application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the application and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
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 first schematic view of the foldable display screen of FIG. 1;
FIG. 4 is a first schematic structural view of the foldable protective film of FIG. 3;
FIG. 5 is a second schematic view of the foldable protective film of FIG. 3;
FIG. 6 is a schematic view of a third construction of the foldable protective film of FIG. 3;
FIG. 7 is a second schematic view of the foldable display screen of FIG. 1;
FIG. 8 is a third schematic view of the foldable display screen of FIG. 1;
FIG. 9 is a fourth schematic view of the foldable display screen of FIG. 1;
FIG. 10 is a fifth schematic structural view of the foldable display screen shown in 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 protection film according to an embodiment of the present application;
FIG. 14 is a schematic diagram of the carbon ion implantation process of FIG. 13;
fig. 15 is a schematic flow chart of 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 accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the 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 application. The foldable electronic device 10 of fig. 1 may be, but is not limited to, a foldable cellular phone, a foldable tablet computer, a foldable Personal digital assistant (Personal DIGITAL ASSISTANT, PDA), a foldable electronic book reader, a foldable MP3 player, a foldable MP4 player, a foldable wearable device, a foldable navigator, a foldable palm game, etc. the foldable electronic device 10 of fig. 1 includes a housing 100 and a foldable display screen 200.
Wherein the foldable display screen 200 is used for displaying pictures. The foldable display screen 200 may have a regular shape, such as a rectangular parallelepiped structure, a rounded rectangular structure, and the foldable display screen 200 may have an irregular shape. The foldable display screen 200 may employ a flexible Organic LIGHT EMITTING Diode (OLED), a flexible Liquid crystal display screen (Liquid CRYSTAL DISPLAY, LCD), a flexible Active-matrix Organic light emitting Diode (AMOLED), or other types of foldable display screens 200.
Preferably, the foldable display screen 200 may employ an AMOLED display screen, which is a self-luminous display screen, without a backlight module. Accordingly, when the substrate in the AMOLED display screen is made of a flexible resin material, such as polyethylene terephthalate (polyethylene terephthalate, PET), the AMOLED display screen can have a bendable property.
The case 100 is used to form an outer contour of the electronic device, and the foldable display screen 200 is provided on the case 100. The housing 100 may be formed of 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 housing 100 may be formed using a unitary configuration in which some or all of the housing 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 forming an outer housing surface, etc.).
The casing 100 may be a foldable casing 100, specifically, the foldable casing 100 includes a middle frame and a decorative ring, the foldable display screen 200 is disposed on the middle frame, the decorative ring is disposed on the middle frame, and an inner edge of the decorative ring is disposed around a circumference of 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, and the foldable electronic device 10 includes a bendable portion and a non-bendable portion according to an embodiment of the present application. Such as a bendable portion connected between two non-bendable portions, and the two non-bendable portions can be bent by the bendable portions to effect switching between a bent state and an unfolded state of the foldable electronic device 10. In this way, when the foldable electronic device 10 is in the folded state (as shown in fig. 2), the occupied space of the foldable electronic device 10 can be made smaller, so that the foldable electronic device 10 is convenient to carry and store; 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, so that the user can operate and read the foldable electronic device 10 conveniently. It should be noted that the bendable portion of the foldable electronic device 10 may have one bending direction, that is, may be bent unidirectionally; the foldable electronic device 10 may have two bending directions, i.e., may be bent in both directions.
As shown in fig. 3, fig. 3 is a schematic view of a first structure of the foldable display screen shown in fig. 1. The foldable display screen 200 of embodiments 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 with an organic light emitter encapsulated therebetween; the liquid crystal material may be encapsulated between the display substrate and the encapsulation material, and the motherboard of the foldable electronic device 10 provides voltage for the liquid crystal material, so as to change the arrangement direction of the liquid crystal molecules, and after the light projected by the backlight module is co-acted inside the display panel 300, an image is formed in the display area, so as to display a picture. 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 protective film 220 according to the embodiment of the present application may be a foldable protective film 220, where the protective 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 a non-bending region 211 and a bending region 212, and the bending region 212 is in a bent state when the flexible display panel 210 is in a folded state. It should be noted that, the flexible display panel 210 may include two modes of folding in and folding out, and in the folded state, when the non-folding area 211 of the flexible display panel 210 is opposite, the flexible display panel 210 is in the folded state; when the non-bending regions 211 of the flexible display panel 210 face away from each other, the flexible display panel 210 is in an outwardly-folded state.
The foldable protection film 220 includes a non-bent portion 221 and a bent portion 222. Specifically, the non-bending portion 221 is configured 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 bending portion 222 is configured to cover the bending region 212, and the non-bending portion 221 is connected to both sides of the central axis of the bending portion 222. In the extending direction of the bending portion 222, a straight line passing through the geometric center of the bending portion 222 may be defined as a central axis of the bending portion 222 (as shown in "a-b" of fig. 4, and fig. 4 is a first structural schematic diagram of the foldable protection film shown in fig. 3), the bending portion 222 may be bent around the central axis, and by providing the non-bending portion 221 connected to two sides of the central axis of the bending portion 222, the non-bending portion 221 may be turned around the central axis when the electronic device is folded, so that the non-bending portion 221 and the non-bending region 211 keep a synchronous motion state, and thus the non-bending portion 221 may be always attached to and covered on the non-bending region 211 to protect the non-bending region 211 from being scratched.
Specifically, as shown in fig. 4, the non-bending portion 221 is connected to two sides of a central axis of the bending portion 222, when the user folds the electronic device, the non-bending portion 211 is rotated around the bending portion 212 by the user operation, and accordingly, the non-bending portion 221 covered on the non-bending portion 211 is rotated around the bending portion 222, during this process, the non-bending portion 221 moves synchronously with the non-bending portion 211, the bending portion 222 moves synchronously with the bending portion 212, 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 the user expands the electronic device, the user operates the non-bending region 211 to rotate around the bending region 212, and accordingly, the non-bending portion 221 covered on the non-bending region 211 rotates around the bending portion 222, during this process, the non-bending portion 221 moves synchronously with the non-bending region 211, the bending portion 222 moves synchronously with the bending region 212, and when the electronic device is in the expanded state, the non-bending region 211 and the bending region 212 are in the same plane, and the non-bending portion 221 and the bending portion 222 are smoothly connected to cover the display screen in the expanded state.
As shown in fig. 5, fig. 5 is a second schematic structural view of the foldable protection film shown in fig. 3, and the foldable protection film 220 according to the embodiment of the present application includes: the base film layer 223 and the deposition layer 224, the deposition layer 224 is disposed on one side of the base film layer 223 and is integrally formed with the base film layer 223.
Wherein the material of the base film layer 223 comprises a polymeric material, which may comprise a polyolefin, polyamide, polyester, polyacrylic, polystyrene, copolymers thereof, or combinations thereof. The material of the deposition layer 224 includes a polymer-carbon composite formed from a polymer material by carbon ion implantation.
The carbon ion implantation process can be specifically performed by adopting a low-energy implantation mode. The energy of the carbon ion implantation is based on the actual material and thickness of the base film layer 223, and the dosage of the carbon ion implantation is based on the doped carbon content of the deposited layer 224 to be formed or the hardness of the deposited layer 224.
The element composition of the surface of the base film 223 is changed after the carbon ion implantation, the ionization energy loss of the implanted ions in the polymer material causes the molecular chain of the surface of the base film 223 to simultaneously generate complex processes such as cracking, reconstruction, crosslinking and the like, free hydrogen atoms are combined to generate hydrogen gas and release from the surface, the hydrogen content of the surface of the base film 223 is reduced, active bonds generated after the carbon ion implantation are mutually crosslinked, chain molecules form a macromolecular network structure, simultaneously, carbon aggregation and carbide particle deposition occur on the surface of the base film 223, and finally, a deposition layer 224 of the polymer-carbon composite material is formed on the surface of the base film 223, and the deposition layer 224 presents the characteristics of hardness enhancement, impact resistance enhancement and surface wear resistance enhancement.
In some embodiments, the hardness of the deposited layer 224 is 5-7H (Brinell hardness).
Unlike the prior art, the embodiment of the application forms the deposition layer 224 of the polymer-carbon composite material on one side of the base film layer 223 by performing carbon ion implantation on the polymer material of the base film layer 223, and can improve the impact resistance and the surface wear resistance of the foldable protective film 220 on the premise of keeping the foldable characteristics of the base film layer 223 by forming the deposition layer 224 with the characteristics of enhanced hardness, enhanced impact resistance, enhanced surface wear resistance and the like; 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 of the foldable protective film 220 is improved and the young's modulus is reduced.
In some embodiments, the polymeric 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 polymethyl methacrylate (PMMA, also known as acrylic), 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 polymethyl methacrylate or thermoplastic polyurethane elastomer rubber.
The modified polyester material can be an organosilicon 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 base film layer 223 and improve the stress of the surface of the polyester base film layer 223, improving the surface finish of the polyester base film layer 223. And adding an ultraviolet blue light absorber for modification to obtain the polyester base film layer 223 with the functions of blue light resistance and ultraviolet resistance.
As shown in fig. 6, fig. 6 is a schematic diagram of a third structure of the foldable protection film shown in fig. 3, where the foldable protection film 220 according to the embodiment of the present application further includes a transparent supporting layer 225 disposed on a side of the base film layer 223 away from the deposition layer 224, where the transparent supporting layer 225 has a certain rigidity, and can provide a supporting function for the base film layer 223, so as to improve the flatness of the entire surface of the base film layer 223, and enable the non-bending portion 221 and the bending portion 222 of the foldable protection film 220 to have higher flatness when the foldable display screen 200 is in a fully unfolded state or in a folded state, so as to avoid 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 (Ultra THIN GLASS, UTG) or thin glass. More preferably, the transparent support layer 225 may be made of ultra-thin flexible glass, which may be bent, folded, and curled, and has characteristics of being foldable, flexible, hard, and abrasion-resistant.
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 present application may further include a polarizer 226, and the polarizer 226 is disposed between the flexible display panel 210 and the protective film 220. Polarizer 226 may be made of a polyvinyl alcohol (polyvinyl alcohol, PVA) material, for example, polarizer 226 may be a polyvinyl alcohol film made of a polyvinyl alcohol material. The number of polarizers 226 may be one, and one polarizer 226 may be disposed at the display surface 300 of the flexible display panel 210. Of course, a polarizer 226 may 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 be plural, for example, two polarizers 226, three polarizers 226 or other number of polarizers 226, and the number of the polarizers 226 may be set according to the actual situation, which is not limited in the embodiment of the present application.
As shown in fig. 8, fig. 8 is a schematic view of a third structure of the foldable display screen shown in fig. 1. The flexible display panel 210 of the embodiment of the present application may include a display module 213 and a capacitive fingerprint sensor film 214. The capacitive fingerprint sensor film 214 is located at one side of the display module 213 near the protective 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 protective 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 for reducing the brightness of the incident light from the protective film 220 to the capacitive fingerprint sensor film 214, so as to reduce the abnormal color phenomenon of a certain angle on the appearance of the flexible display panel 210 caused by the reflection of the grid traces (particularly the metal grid traces) on the capacitive fingerprint sensor film 214.
As shown in fig. 9, fig. 9 is a schematic view of a fourth structure 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 film substrate 216, a TFT substrate 217, an induction coil 218 and a lower polarizer 219 that are sequentially stacked, wherein the induction coil 218 is disposed between the TFT substrate 217 and the lower polarizer 219, and the protective film 220 is disposed on a side of the upper polarizer 215 facing away from the color film substrate 216.
As shown in fig. 10, fig. 10 is a schematic view of a fifth structure of the foldable display screen shown in fig. 1. The flexible display panel 210 according to the embodiment of the present application may include an upper polarizer 215, a color film substrate 216, a TFT substrate 217, a lower polarizer 219, an induction coil 218, and a backlight module (not shown) which 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 driving IC on the TFT substrate 217 can be reduced.
As shown in fig. 11, fig. 11 is a schematic view of a sixth structure 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 protective film 220 in the embodiment of the present application.
The transparent filling adhesive layer 230 may be, for example, an OCA optical adhesive, which is a special adhesive for bonding transparent optical elements, and has the characteristics of colorless transparency, light transmittance of more than 90%, good bonding strength, and being curable at room temperature or medium temperature.
As shown in fig. 12, fig. 12 is a schematic view of a seventh structure of the foldable display screen shown in fig. 1. In the embodiment of the application, the polarizer 226 is bonded to the protective film 220 and the flexible display panel 210 simultaneously by using the transparent filling adhesive layer 230, and the transparent filling adhesive layer 230 can be made of an OCA (Optically CLEAR ADHESIVE) optical adhesive material or other adhesive layer materials.
Referring to fig. 13, fig. 13 is a flowchart of a method for manufacturing a foldable protection film according to an embodiment of the present application, where the method is used for manufacturing a foldable protection film 220 according to the above embodiment, and specifically includes the following steps:
s10: the base film layer 223 is prepared, wherein the material of the base film layer 223 comprises a polymeric material.
Specifically, 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 polymethyl methacrylate (PMMA, also known as acrylic), 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 organosilicon modified polyester material or a polyester material modified by adding an ultraviolet blue light absorber.
More preferably, the polyester material may include polymethyl methacrylate or 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 portion of the thickness of the polymer material of the base film layer 223 within the predetermined region into a polymer-carbon composite material, forming a deposition layer 224 integrally formed 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 a polymer-carbon composite material, and at this time, the thickness of the base film layer 223 in the predetermined region is 0; or may convert a portion of the thickness of the polymer material of the base film layer 223 in a predetermined region into a polymer-carbon composite, i.e.: at the time of carbon ion implantation, all the polymer material in the predetermined region is not converted into a polymer-carbon composite material, and thus, a part of the polymer material remains under the deposition layer 224 formed by carbon ion implantation.
In this step, the carbon ion implantation process may be performed with a low energy (for example, with an energy of 0.5 to 5MeV or an energy of 60 to 80 keV). The energy of the carbon ion implantation is based on the actual material and thickness of the base film layer 223, and the dosage of the carbon ion implantation is based on the doping ion concentration of the polymer-carbon composite material to be formed or the hardness of the deposited layer 224.
It should be noted that, the first predetermined area is an area in the base film layer 223 where the polymer-carbon composite material needs to be formed. Second, the depth of the specific carbon ion implantation may be set according to the actual situation.
The element composition of the surface of the base film 223 is changed after the carbon ion implantation, the ionization energy loss of the implanted ions in the polymer material causes the molecular chain of the surface of the base film 223 to simultaneously generate complex processes such as cracking, reconstruction, crosslinking and the like, free hydrogen atoms are combined to generate hydrogen gas and release from the surface, the hydrogen content of the surface of the base film 223 is reduced, active bonds generated after the carbon ion implantation are mutually crosslinked, chain molecules form a macromolecular network structure, simultaneously, carbon aggregation and carbide particle deposition occur on the surface of the base film 223, and finally, a deposition layer 224 of the polymer-carbon composite material is formed on the surface of the base film 223, and the deposition layer 224 presents the characteristics of hardness enhancement, impact resistance enhancement and surface wear resistance enhancement.
In some embodiments, the hardness of the deposited layer 224 is 5-7H (Brinell hardness).
Unlike the prior art, the embodiment of the present application forms the deposition layer 224 of the polymer-carbon composite material on one side of the base film layer 223 by performing carbon ion implantation on the polymer material of the base film layer 223, and improves the impact resistance and the surface abrasion resistance of the foldable protective film 220 on the premise of maintaining the foldable characteristics of the base film layer 223 by forming the deposition layer 224 exhibiting the characteristics of enhanced hardness, enhanced impact resistance, enhanced surface abrasion resistance, and the like.
Referring to fig. 14, fig. 14 is a schematic flow chart of the carbon ion implantation in fig. 13, and the carbon ion implantation in the step S20 specifically includes the following steps:
s21: the carbon ion implanted raw material is ionized under vacuum conditions to produce an ion beam.
S22: the ions are accelerated and the ion beam is implanted into the base film layer 223.
The base film layer 223 is placed on a vacuum chamber sample stage, and after the vacuum chamber is vacuumized, the vacuum chamber sample stage is slowly rotated along the axis of the vacuum chamber sample stage at a constant speed, and simultaneously, the ion implanter is used for carbon ion implantation of the polymer material. Wherein the raw materials for carbon ion implantation comprise C xHy + or C +, and x and y are more than or equal to 1 and are integers.
Referring to fig. 15, fig. 15 is a schematic flow chart of step S10 in fig. 13, where 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 (Ultra THIN GLASS, UTG) or thin glass. More preferably, the transparent support layer 225 may be made of ultra-thin flexible glass, which may be bent, folded, and curled, and has characteristics of being foldable, flexible, hard, and abrasion-resistant.
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 coating a polymer material solution on one side of the transparent support layer 225 and then curing the same, 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, and processed the substrate into a sheet-like sample (wherein the ultra-thin glass has a size of 15cm×8cm×0.5mm, the TPU layer has a size of 15cm×8cm×0.5 mm), and performed CH + implantation on an ion implanter, wherein the ion dose ranges from 1×10 15ions/cm2, and the implantation energy ranges from 0.5 to 5MeV. The abrasion loss (dry abrasion state) of the surface of the sheet sample before and after ion implantation was measured on a dynamic and static frictional abrasion tester, and the test found that: after ion implantation, the abrasion resistance of the surface of the sheet sample facing away from the ultrathin glass is enhanced by 47.5 times, the brittleness of the foldable protective film 220 is improved, and the Young's modulus is reduced to 24×10 3 GPa.
The foldable protection film, the foldable display screen and the foldable electronic device provided by the embodiment of the application are described in detail above. Specific examples are set forth herein to illustrate the principles and embodiments of the present application and are provided to aid in the understanding of the present application. Meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (9)
1. A foldable protective film for use in a foldable display screen, comprising:
A base film layer;
The deposition layer is arranged on one side of the base film layer and is of an integrated structure with the base film layer;
The material of the base film layer comprises a polymer material, the material of the deposition layer comprises a polymer-carbon composite material formed by carbon ion implantation of the polymer material, the raw material of the carbon ion implantation is C xHy +, x and y are more than or equal to 1 and are integers, the energy of the carbon ion implantation is 0.5-5 MeV or 60-80 keV, the hardness of the deposition layer is 5-7H (Brinell hardness), and the deposition layer comprises carbon aggregation and carbide particles;
the polymer material comprises a polyester material and/or a modified polyester material, wherein the modified polyester material is an organosilicon modified polyester material or a polyester material modified by adding an ultraviolet blue light absorber;
the polymer-carbon composite material includes a polyester-carbon composite material and/or a modified polyester-carbon composite material.
2. The foldable protective film of claim 1, wherein the foldable protective film further comprises:
and the transparent supporting layer is arranged on one side of the base film layer far away from the deposition layer.
3. A method for manufacturing a foldable protective film, the foldable protective film being applied to a foldable display screen, the method comprising:
Preparing a base film layer, wherein the material of the base film layer comprises a polymer material, the polymer material comprises a polyester material and/or a modified polyester material, and the modified polyester material is an organosilicon modified polyester material or a polyester material modified by adding an ultraviolet blue light absorber;
And carrying out carbon ion implantation on a preset area of the base film layer to enable polymer materials with at least partial thickness of the base film layer in the preset area to be converted into polymer-carbon composite materials, so as to form a deposition layer which is integrated with the base film layer, wherein the raw materials for carbon ion implantation are C xHy +, x and y are larger than or equal to 1 and are integers, the energy during carbon ion implantation is 0.5-5 MeV or 60-80 keV, the hardness of the deposition layer is 5-7H (Brinell hardness), the deposition layer comprises carbon aggregates and carbide particles, and the polymer-carbon composite materials comprise polyester-carbon composite materials and/or modified polyester-carbon composite materials.
4. The method of claim 3, wherein the carbon ion implantation comprises:
ionizing a carbon ion implanted raw material under vacuum conditions to generate an ion beam;
The ions are accelerated and the ion beam is implanted into the base film layer.
5. A method according to claim 3, wherein the step of preparing a base film layer comprises:
Providing a transparent supporting layer;
And forming the base film layer on one side of the transparent supporting layer.
6. A foldable display screen, comprising:
a flexible display panel;
A protective film which is a foldable protective film according to any one of claims 1 to 2 or a foldable protective film produced by the method of any one of claims 3 to 5, the protective film covering a display surface of the flexible display panel.
7. The foldable display screen of claim 6, wherein the foldable display screen further comprises:
And the polaroid is arranged between the flexible display panel and the protective film.
8. The foldable display screen of claim 6, wherein the foldable display screen is configured to be folded,
And a transparent filling adhesive layer is filled between the flexible display panel and the protective film.
9. A foldable electronic device, comprising:
A housing;
A foldable display screen provided on the housing, the foldable display screen being a foldable display screen according to any one of claims 6 to 8.
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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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