CN110673239A - Naked eye 3D mobile phone backboard film, preparation method thereof and mobile phone - Google Patents
Naked eye 3D mobile phone backboard film, preparation method thereof and mobile phone Download PDFInfo
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- CN110673239A CN110673239A CN201911005113.XA CN201911005113A CN110673239A CN 110673239 A CN110673239 A CN 110673239A CN 201911005113 A CN201911005113 A CN 201911005113A CN 110673239 A CN110673239 A CN 110673239A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/0056—Arrays characterized by the distribution or form of lenses arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0012—Arrays characterised by the manufacturing method
- G02B3/0031—Replication or moulding, e.g. hot embossing, UV-casting, injection moulding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
Abstract
The invention relates to a naked eye 3D mobile phone back panel film, a preparation method thereof and a mobile phone. The naked eye 3D mobile phone back plate film comprises a transparent thin film layer; the front surface of the transparent film layer is provided with a micro-lens array layer; the back surface of the transparent film layer is sequentially provided with a microstructure pattern layer and a local printing layer; a supporting layer is arranged on the back of the local printing layer; the micro-lens array layer comprises a plurality of micro-lenses which are arranged in an array. The naked eye 3D mobile phone back plate film is remarkable in stereoscopic impression, rich in appearance display effect, capable of presenting a naked eye 3D display effect within a 360-degree full-angle range, strong in visual impact force and sensory experience, and excellent in wear resistance.
Description
Technical Field
The invention relates to the field of mobile phone backboard films and printing, in particular to a naked eye 3D mobile phone backboard film, a preparation method thereof and a mobile phone.
Background
In recent years, the smart phone industry is rapidly developed, but the homogenization phenomenon is increasingly serious, and the appearance design innovation becomes a breakthrough point for attracting consumers and improving brand influence in intense competition for various mobile phone manufacturers. With the arrival of the 5G era, the mobile phone backboard market faces to shuffle again, and a glass mobile phone backboard capable of carrying NFC, WiFi and wireless charging technologies without obstacles will be a development trend of the future mobile phone industry.
The popular visual innovation of the appearance of the glass mobile phone back panel film in the current market mainly has two modes: one is to process texture patterns on glass by etching, the process has great pollution to the environment, and the realized texture patterns are relatively coarse, only the processing of the texture patterns with the line width of the texture lines being more than or equal to 0.01mm can be realized, and the processing of the refined micro texture patterns with the line width being less than 0.01mm cannot be realized; the other is a mobile phone back panel film with gradient color and refraction effects manufactured by magnetron sputtering coating and UV transfer printing processes, and the process is difficult to control and relatively high in cost.
In conclusion, most of the glass mobile phone back panel films on the market are designed and developed aiming at textures and colors, and are poor in environmental protection, rough in precision and simple or homogeneous in visual effect.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The first purpose of the invention is to provide a naked eye 3D mobile phone back plate film, which has the advantages of obvious three-dimensional effect, rich appearance display effect, strong visual impact force and sensory experience and excellent wear resistance, and can present a naked eye 3D display effect within a 360-degree full-angle range.
The second purpose of the invention is to provide the preparation method of the naked eye 3D mobile phone back panel film, which is simple, efficient, controllable in cost, green and environment-friendly, high in processing precision, high in processing efficiency, short in period, convenient, rapid and outstanding in personalized design, and can be customized according to the requirements.
The third purpose of the invention is to provide a mobile phone comprising any one of the naked eye 3D mobile phone backboard films.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the naked eye 3D mobile phone back panel film comprises a transparent thin film layer;
the front surface of the transparent film layer is provided with a micro-lens array layer; the back surface of the transparent film layer is sequentially provided with a microstructure pattern layer and a local printing layer; a supporting layer is arranged on the back of the local printing layer;
the micro-lens array layer comprises a plurality of micro-lenses which are arranged in an array.
In the present invention, the back surface of the partial printing layer refers to the other surface of the partial printing layer opposite to the surface provided with the microstructure pattern layer. That is, the partial printing layer is disposed between the microstructure pattern layer and the support layer.
Optionally, the array arrangement is selected from an orthogonal arrangement and/or a regular hexagonal arrangement.
Optionally, the aperture of the microlens in the microlens array layer is selected from at least one of a circle, a regular hexagon, a square, or a regular triangle.
Optionally, the geometric size of the microlenses in the microlens array layer and the selection of the spacing between two adjacent microlenses are determined by the naked-eye 3D display effect finally presented.
Optionally, the material of the transparent film layer is at least one selected from polyethylene terephthalate, polypropylene, toluene diisocyanate, polyvinyl chloride, and polyurethane.
Optionally, the transparent film layer is made of polyethylene terephthalate.
Optionally, the visible light band transmittance of the transparent thin film layer is 90% to 92%.
Optionally, the transparent thin film layer is an optical-grade transparent thin film, and the surface flatness of the transparent thin film layer is high.
Optionally, the thickness of the transparent thin film layer is 40 μm to 90 μm.
Optionally, the thickness of the microlens array layer is 1mm to 1.5 mm.
Optionally, the thickness of the microstructure pattern layer is 2 μm to 20 μm.
Optionally, the thickness of the local printing layer is 1 μm to 8 μm.
Optionally, the local printing layer may be selected according to actual needs to have patterns and colors required by printing.
Optionally, the color of the partial printing layer is colorful.
As an embodiment of the present invention, as shown in fig. 3, a 3D optical film provided with the microlens array layer: the optical film substrate thickness Tc is 50 μm, the microlens height h is 10 μm, the microlens element pitch D is 11 μm, the microlens element center distance D is 46 μm, and the microlens element diameter R is 35 μm.
As an embodiment of the present invention, as shown in fig. 4, a 3D optical film provided with the microlens array layer: the optical film substrate thickness Tc is 75 μm, the microlens height h is 15 μm, the microlens element pitch D is 13 μm, the microlens element center distance D is 68 μm, and the microlens element diameter R is 55 μm.
According to the invention, a complex micro-lens array and a microstructure pattern are manufactured on a transparent film substrate product, and color pattern printing is added, so that the mobile phone back panel film with the personalized naked-eye 3D display effect is obtained, and the mobile phone back panel film can be manufactured into the glass mobile phone back panel with the naked-eye 3D display effect after being attached to glass.
Optionally, the support layer is an aluminum layer.
Optionally, the thickness of the support layer is 0.1 μm to 0.8 μm.
Optionally, the back surface of the support layer is further provided with a primer layer.
Optionally, the thickness of the base color layer is 1 μm to 20 μm.
Optionally, the base color layer may be a base color according to actual conditions.
Optionally, the color of the base color layer is white or black.
As an embodiment of the invention, the naked eye 3D mobile phone back panel film is sequentially provided with a microlens array layer, a transparent thin film layer, a microstructure pattern layer, a local printing layer, an evaporated aluminum layer, and a full-plate base color layer from top to bottom.
As an embodiment of the invention, a microlens array layer is imprinted on the outer surface of a transparent film substrate of the naked eye 3D mobile phone back panel film, and a microstructure pattern layer is imprinted on the inner surface; the lower surface of the microstructure pattern layer is provided with a local printing layer; the lower surface of the local printing layer is provided with an evaporated aluminum layer; the lower surface of the evaporation aluminum layer is provided with a full-plate bottom color layer.
According to another object of the invention, a method for preparing any one of the naked eye 3D mobile phone backboard films comprises the following steps:
A) imprinting the UV resin composition to the front surface of the transparent film in a micro-nano imprinting mode to form a micro-lens array layer;
B) printing a microstructure pattern on the back of the transparent film in a UV transfer printing mode to form a microstructure pattern layer;
C) locally printing a pattern on the surface of the microstructure pattern layer to form a local printing layer;
D) and forming a supporting layer on one side of the local printing layer by evaporation.
Optionally, before the micro-nano imprinting and/or the UV transfer printing is performed, a double-sided surface chemical treatment is performed on the transparent film.
Optionally, the surface chemical treatment method comprises anodizing, surface super-hardening, salt bath compounding, chemical oxidation, and chemical vapor deposition.
According to the invention, the surface free energy and the surface tension of the transparent film can be increased by performing the surface chemical treatment on the double surfaces of the transparent film, so that the adhesion fastness and the adhesion stability of the micro-lens array layer or the microstructure pattern layer and the transparent film layer in the subsequent micro-nano imprinting or UV transfer printing process can be improved.
Optionally, the support layer is flood printed with an undercolor layer.
Optionally, in step a), the UV resin composition comprises a UV resin, a monomer and a photoinitiator.
Optionally, the UV resin is selected from at least one of an acrylate resin oligomer, a polyester acrylate oligomer, an epoxy resin oligomer, a silicone oligomer, or an unsaturated polyester resin oligomer.
Optionally, the UV resin is an acrylate resin oligomer.
Optionally, the monomer is selected from at least one of acrylate resin monomer, vinyl ether monomer, vinyl acetate monomer, and isooctyl acrylate monomer.
Optionally, the monomer is an acrylate resin monomer.
Optionally, the photoinitiator is selected from at least one of 2-hydroxy-2-methyl propiophenone, 1-hydroxycyclohexyl phenyl methanone, or 2-hydroxy-2-methyl-1-phenyl methanone.
Optionally, the photoinitiator is 2-hydroxy-2-methyl propiophenone and/or 1-hydroxycyclohexyl phenyl methanone.
As an embodiment of the present invention, in the step a), the UV resin composition includes a mixture of acrylate resin monomer, acrylate resin oligomer, 2-hydroxy-2-methylpropiophenone, and 1-hydroxycyclohexyl phenyl ketone.
As an embodiment of the present invention, the UV resin composition includes 40 wt.% to 50 wt.% of acrylate resin monomers, 40 wt.% to 43 wt.% of acrylate resin oligomers, 3 wt.% to 5 wt.% of 2-hydroxy-2-methylpropiophenone, 1 wt.% to 2 wt.% of 1-hydroxycyclohexyl phenyl ketone, and 0.01 wt.% to 1 wt.% of other components.
Optionally, in step a), the micro-nano imprinting method includes:
the nano-scale optical mold is prepared by a laser engraving method, and the transparent film and the UV resin composition are adopted to carry out micro-nano imprinting through a roll-to-roll microstructure optical film forming device.
Optionally, the optical mold is a cylindrical seamless optical roller of nickel alloy.
As an implementation mode of the invention, the micro-nano imprinting process comprises the following steps: feeding → tension control → dust removal and static electricity removal → UV resin composition → impression forming → UV curing → demoulding → static electricity removal → rolling → cutting and trimming of flash → quality inspection → finished product packaging.
Optionally, in the micro-nano imprinting process, the curing and forming temperature of the UV resin composition is 30-70 ℃, the curing and forming time is 2-4 s, the ultraviolet exposure curing energy is 1000-3000 mJ, and the imprinting speed is 10-20 m/min.
Optionally, in the step B), the material for printing the microstructure pattern by means of UV transfer printing includes a light-curable resin, a surfactant and a photosensitizer.
Optionally, the light-curable resin is selected from at least one of polyurethane acrylic resin, epoxy acrylate, polyether acrylate or polyester acrylate.
Optionally, the light-curable resin is a urethane acrylic resin.
Optionally, the surfactant is selected from at least one of polyoxyethylene ether, cyclic hydrocarbon fatty acid sodium salt and polyoxyethylene alkyl ether.
Optionally, the photosensitizer is selected from at least one of benzophenone, michaelis-ler's ketone, thioxanthone, or benzil.
In one embodiment of the present invention, the material used for printing the microstructure pattern by UV transfer printing includes a mixture of a light-curable polyurethane acrylic resin, a surfactant, and a photosensitizer.
Optionally, in step B), the method of UV transfer comprises:
a) designing a 3D micro-image-text publication document;
b) performing CTP plate making according to the 3D micro-image-text publication file to obtain a 3D micro-image-text PS plate;
c) and carrying out UV transfer printing by taking the 3D micro-image-text PS plate as a printing plate, or carrying out UV transfer printing after transferring the 3D micro-image-text PS plate into a sub-mold.
As an embodiment of the present invention, step a) is specifically: and simulating a 3D imaging effect through software to meet the imaging requirement matched with the microlens film, and then designing a 3D microimage-text publication document.
As an embodiment of the present invention, step b) is specifically: and preparing a PS plate with a corresponding pattern by a CTP platemaking machine.
Optionally, the publishing precision of the CTP plate is 12800dpi or more;
optionally, the CTP plate material for CTP plate making is a heat-sensitive positive CTP plate with the thickness of 0.27 mm.
As an embodiment of the present invention, step c) is specifically: the method has the advantages that the PS plate, the UV photoresist and the micro-lens film material (the transparent film with the micro-lens array layer printed in a pressed mode) are used for preparing the micro-structure pattern on the back face of the transparent film, the micro-structure pattern is directly transferred to the micro-lens film material through the PS plate, the service life of the PS plate is limited, the cost is high, and the method is suitable for being applied to large-size products.
As another embodiment of the present invention, step c) is specifically: the method is characterized in that a PS plate is transferred into a sub-die, the sub-die, UV photoresist and a micro-lens film material (a transparent film with a micro-lens array layer printed in a pressing mode) are used for preparing a microstructure pattern on the back surface of the transparent film, the PS plate indirectly transfers the microstructure pattern onto the micro-lens film material in a mode of the rotor die, the service life of the PS plate is prolonged, and the method is suitable for being applied to small-size products.
Optionally, the UV exposure curing energy of the UV transfer printing is 1500 mJ-3000 mJ, and the time is 1 s-3 s.
Optionally, before the PS plate is transferred, a release agent is sprayed for proper surface treatment.
Optionally, the substrate material of the daughter mold in the UV transfer is polycarbonate.
According to the invention, a UV transfer printing process is used for replacing a micro-nano mold photoetching plate making technology and a laser etching technology, the high-precision and high-efficiency publishing capability of a CTP plate making machine is utilized to quickly prepare the PS plate with the microstructure pattern, and then the personalized microstructure pattern can be conveniently and completely transferred to the back of the transparent film substrate, so that compared with the traditional mold development, the cost and the period of the method have obvious advantages.
Alternatively, in step C), the C, M, K, Y four-color printing process is performed to form the partial print layer.
Optionally, when the partial printing layer or the base color layer is printed, the printing speed is 20m/h to 30m/h, and the pressure is 0.05Pa to 0.15 Pa.
Optionally, when the partial printing layer or the base color layer is printed, the printing speed is 23m/h, and the pressure is 0.1 Pa.
Optionally, the evaporation in the step D) is performed by using a winding type vacuum thermal evaporation coater.
In one embodiment of the present invention, the evaporation in step D) is performed by evaporating a full aluminum layer using a winding vacuum thermal evaporation coater.
As an embodiment of the present invention, the evaporation process in step D) includes: unreeling the substrate → vacuumizing → heating the evaporation boat → sending aluminum wire → evaporating and coating → cooling → measuring thickness → flattening → reeling.
As an embodiment of the invention, a full-plate base color layer is printed after the aluminum layer is evaporated, and the base color layer can be selected according to actual conditions, and optionally, the color is black.
As an implementation mode of the invention, the prepared naked eye 3D mobile phone back panel film is subjected to subsequent die cutting, gum coating, laminating and film separating, quality inspection and packaging to obtain a final finished product or a sold product.
According to another object of the invention, a mobile phone comprising any one of the naked-eye 3D mobile phone backboard films is provided.
Compared with the prior art, the invention has the beneficial effects that:
(1) the naked eye 3D mobile phone back plate film provided by the invention is remarkable in stereoscopic impression, rich in appearance display effect, capable of presenting a naked eye 3D display effect in a 360-degree full-angle range, strong in visual impact force and sensory experience, and excellent in wear resistance.
(2) The preparation method of the naked eye 3D mobile phone back panel film provided by the invention is simple and efficient, controllable in cost, green and environment-friendly, high in processing precision, high in processing efficiency, short in period, convenient and outstanding in personalized design, and can be customized according to the requirements in a personalized manner.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic cross-sectional view of a naked eye 3D mobile phone back panel film according to an embodiment of the present invention;
wherein the reference numbers are as follows:
10-a microlens array layer; 20-a transparent film layer; 30-a microstructured pattern layer; 40-partial printing layer; 50-evaporating and plating an aluminum layer; 60-full plate bottom color layer;
FIG. 2 is a flow chart of an overall preparation process of a naked eye 3D mobile phone back plate film according to an embodiment of the invention;
FIG. 3 is a schematic view of a partial microscopic view of a 3D optical film with a microlens array layer disposed thereon, in accordance with one embodiment of the present invention;
FIG. 4 is a schematic view of a partial microscopic view of a 3D optical film provided with a microlens array layer according to another embodiment of the present disclosure;
FIG. 5 is a schematic view illustrating a visual effect of a naked eye 3D mobile phone back panel film according to an embodiment of the present invention;
FIG. 6 is a schematic view of a naked eye 3D mobile phone back panel film according to another embodiment of the present invention;
fig. 7 is a schematic view illustrating a visual effect of a naked eye 3D mobile phone back panel film according to still another embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
Example 1
The overall preparation process flow chart of the naked eye 3D mobile phone back plate film is shown in FIG. 2, and the specific preparation method is as follows:
the transparent film with high surface flatness, strong adhesion with the UV resin composition, and visible light wave band transmittance of 90-92% is selected, the transparent film is made of polyethylene terephthalate and has a thickness of 80 μm, and the transparent film is subjected to double-sided surface chemical treatment, wherein the treatment method can be surface chemical treatment methods commonly used in the field, such as anodic oxidation, surface super-hardening, salt bath compounding, chemical oxidation and chemical vapor deposition.
Micro-nano imprinting
And (3) stamping the UV resin composition to the front surface of the transparent film by taking the transparent film subjected to the surface chemical treatment on the two surfaces as a base material in a micro-nano stamping mode to form a micro-lens array layer. The optical mold of the microlens array is a cylindrical seamless optical roller of nickel alloy prepared by a laser engraving method. The micro-nano imprinting process comprises the following steps:
feeding → tension control → dust removal and static electricity removal → UV resin composition → impression forming → UV curing → demoulding → static electricity removal → rolling → cutting and trimming → quality inspection.
Wherein the UV resin composition is a mixture of acrylate resin monomer, acrylate resin oligomer, 2-hydroxy-2-methyl propiophenone and 1-hydroxycyclohexyl phenyl ketone;
the curing and forming temperature of the UV resin is 50 ℃, the curing and forming time is 3s, the ultraviolet exposure curing energy is 2500mJ, and the imprinting speed is 15 m/min; the thickness of the formed microlens array layer was 1.0 mm.
3D micro-image-text publication document
And simulating a 3D imaging effect through software to meet the imaging requirement matched with the transparent film embossed with the micro-lens array layer, and then designing a 3D micro-image-text publication document.
UV transfer printing
And (3) outputting a PS version: the PS plate with the corresponding pattern is prepared by a CTP platemaking machine, and the publishing precision of the CTP platemaking machine is required to be more than 12800 dpi. The CTP plate is a heat-sensitive positive CTP plate, and the thickness of the CTP plate is 0.27 mm.
UV transfer printing: preparing a microstructure pattern on the back of a transparent film by using a PS plate, UV (ultraviolet) photoresist and a micro-lens film material (the transparent film with a micro-lens array layer is printed by pressing); the UV optical cement comprises a mixture of light-cured polyurethane acrylic resin, a surfactant and a photosensitizer, the curing and forming time is 2s, and the ultraviolet exposure curing energy is 2500 mJ; the microstructure pattern layer was formed to a thickness of 15 μm.
Partial printing
And (3) locally printing a corresponding color pattern layer on the pattern surface of the UV transfer printing microstructure, and respectively carrying out C, M, K, Y four-color printing procedures, wherein the printing speed is 23m/h, and the pressure is 0.1 Pa. The thickness of the partial print layer formed was 8 μm.
Evaporation coating
And evaporating a full-plate aluminum layer by adopting a winding type vacuum thermal evaporation coating machine. The aluminum evaporation plating process comprises the following steps: unreeling the substrate → vacuumizing → heating the evaporation boat → sending aluminum wire → evaporating and coating → cooling → measuring thickness → flattening → reeling. The thickness of the aluminum deposition layer formed was 0.8. mu.m.
Full-page printing
And after the aluminum layer is evaporated, printing a full-plate bottom color layer, wherein the color is black, the printing speed is 23m/h, and the pressure is 0.1 Pa. The thickness of the formed base layer was 15 μm.
And then, preparing a final finished product through die cutting → gum → composite release film → quality inspection → packaging. The schematic cross-sectional view of the prepared naked eye 3D mobile phone back plate film is shown in FIG. 1.
Example 2
The embodiment of this example is substantially the same as that of example 1, except that the UV transfer method specifically includes:
the method comprises the following steps that a PS plate is transferred to form a sub-die, the sub-die, UV photoresist and a micro-lens film material (a transparent film with a micro-lens array layer printed in a pressing mode) are used, a micro-structure pattern is prepared on the back of the transparent film, and the micro-structure pattern is indirectly transferred to the micro-lens film material by the PS plate in a rotor die mode; the substrate material of the sub-mold is polycarbonate.
Experimental example 1 visual effect and wear resistance of naked eye 3D mobile phone back plate film
Visual effects
As shown in fig. 5, by adjusting the parameters such as size, spacing and the like of the 3D micro-image and text basic elements, a multi-channel and multi-color 3D display effect can be presented.
As shown in fig. 6, by adjusting the parameters such as the size, the distance and the like of the 3D micro-image-text basic elements, 3D display effects such as floating, sinking, enlarging, reducing, gradually changing, regular, irregular, different depth of field and the like can be presented.
As shown in fig. 7, by performing deformation processing such as sphericization, shrinkage, diffusion, polarization, and the like on different regions of the same design document, the arrangement pitch, position, and the like between the 3D micro-image-text basic elements are minutely changed, and a more personalized 3D display effect can be achieved.
Wear resistance
The naked eye 3D mobile phone back panel film prepared by the method in example 1 is typical, and the wear resistance of the film is tested, and the results are shown in table 1.
TABLE 1 abrasion resistance test results
The method provided by the invention can be customized according to the needs of customers, is simple and efficient, has controllable cost, is green and environment-friendly, and has high processing precision, high processing efficiency and short period. The naked eye 3D mobile phone back panel film prepared by the method provided by the invention has a naked eye 3D display effect within a 360-degree full-angle range, can remarkably increase the visual impact force and the sensory experience of a mobile phone back panel product, and has better wear resistance.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The naked eye 3D mobile phone back plate film is characterized in that the naked eye 3D mobile phone back plate film comprises a transparent thin film layer;
the front surface of the transparent film layer is provided with a micro-lens array layer; the back surface of the transparent film layer is sequentially provided with a microstructure pattern layer and a local printing layer; a supporting layer is arranged on the back of the local printing layer;
the micro-lens array layer comprises a plurality of micro-lenses which are arranged in an array.
2. The naked eye 3D mobile phone backplane film of claim 1, wherein the array arrangement is selected from an orthogonal arrangement and/or a regular hexagonal arrangement;
preferably, the aperture of the microlens in the microlens array layer is selected from at least one of a circle, a regular hexagon, a square, or a regular triangle.
3. The naked eye 3D mobile phone backboard film according to claim 1, wherein the transparent film layer is made of at least one selected from polyethylene terephthalate, polypropylene, toluene diisocyanate, polyvinyl chloride or polyurethane, preferably polyethylene terephthalate;
preferably, the visible light wave band transmittance of the transparent film layer is between 90 and 92 percent;
preferably, the thickness of the transparent film layer is 40-90 μm;
preferably, the thickness of the microlens array layer is 1mm to 1.5 mm;
preferably, the thickness of the microstructure pattern layer is 2 to 20 μm;
preferably, the thickness of the local printing layer is 1-8 μm; more preferably, the color of the local printing layer is colorful;
preferably, the support layer is an aluminum layer; the thickness of the supporting layer is 0.1-0.8 μm;
preferably, the back surface of the support layer is also provided with a bottom color layer; the thickness of the bottom color layer is 1-20 μm; more preferably, the color of the base color layer is white or black.
4. A method of preparing the naked eye 3D mobile phone backplate film of any one of claims 1 to 3, comprising the steps of:
A) imprinting the UV resin composition to the front surface of the transparent film in a micro-nano imprinting mode to form a micro-lens array layer;
B) printing a microstructure pattern on the back of the transparent film in a UV transfer printing mode to form a microstructure pattern layer;
C) locally printing a pattern on the surface of the microstructure pattern layer to form a local printing layer;
D) forming a supporting layer on one side of the local printing layer by evaporation;
preferably, before the micro-nano imprinting and/or the UV transfer printing is carried out, double-sided surface chemical treatment is carried out on the transparent film;
preferably, a base color layer is printed on the surface of the support layer in a full-page mode.
5. The method according to claim 4, wherein in step A), the UV resin composition comprises a UV resin, a monomer and a photoinitiator;
preferably, the UV resin is selected from at least one of an acrylate resin oligomer, a polyester acrylate oligomer, an epoxy resin oligomer, a silicone oligomer, or an unsaturated polyester resin oligomer, more preferably an acrylate resin oligomer;
preferably, the monomer is selected from at least one of acrylate resin monomer, vinyl ether monomer, vinyl acetate monomer and isooctyl acrylate monomer, more preferably acrylate resin monomer;
preferably, the photoinitiator is selected from at least one of 2-hydroxy-2-methyl propiophenone, 1-hydroxycyclohexyl phenyl methanone or 2-hydroxy-2-methyl-1-phenyl methanone, more preferably 2-hydroxy-2-methyl propiophenone and/or 1-hydroxycyclohexyl phenyl methanone.
6. The method according to claim 4 or 5, wherein in the step A), the micro-nano imprinting method comprises the following steps:
preparing a nanoscale optical mold by a laser engraving method, and carrying out micro-nano imprinting by using a transparent film and a UV resin composition through a roll-to-roll microstructure optical film forming device;
preferably, in the micro-nano imprinting process, the curing and forming temperature of the UV resin composition is 30-70 ℃, the curing and forming time is 2-4 s, the ultraviolet exposure curing energy is 1000-3000 mJ, and the imprinting speed is 10-20 m/min.
7. The method as claimed in claim 4, wherein in step B), the materials for printing the microstructure pattern by UV transfer printing comprise a light-curable resin, a surfactant and a photosensitizer;
preferably, the light-curable resin is selected from at least one of polyurethane acrylic resin, epoxy acrylate, polyether acrylate or polyester acrylate, and more preferably is polyurethane acrylic resin;
preferably, the surfactant is selected from at least one of polyoxyethylene ether, cyclic hydrocarbon fatty acid sodium salt and polyoxyethylene alkyl ether;
preferably, the photosensitizer is selected from at least one of benzophenone, michaelis-ler's ketone, thioxanthone or benzil.
8. The method according to claim 4 or 7, wherein in step B), the UV transfer method comprises:
a) designing a 3D micro-image-text publication document;
b) performing CTP plate making according to the 3D micro-image-text publication file to obtain a 3D micro-image-text PS plate;
c) carrying out UV transfer printing by taking the 3D micro-image-text PS plate as a printing plate, or carrying out UV transfer printing after transferring the 3D micro-image-text PS plate into a sub-mold;
preferably, the publishing precision of the CTP plate is more than 12800 dpi;
preferably, the CTP plate material for CTP plate making is a heat-sensitive positive CTP plate, and the thickness is 0.27 mm;
preferably, the UV exposure curing energy of the UV transfer printing is 1500 mJ-3000 mJ, and the time is 1 s-3 s.
9. The method as claimed in claim 4, wherein, in the step C), C, M, K, Y four-color printing processes are respectively performed to form partial printing layers;
preferably, when the local printing layer or the bottom color layer is printed, the printing speed is 20-30 m/h, and the pressure is 0.05-0.15 Pa; more preferably, the printing speed is 23m/h and the pressure is 0.1 Pa;
preferably, the evaporation in the step D) is performed by using a winding type vacuum thermal evaporation coater.
10. A mobile phone, characterized in that the mobile phone comprises the naked eye 3D mobile phone back panel film of any one of claims 1 to 3.
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