CN114980593A - Optical film, housing, terminal and preparation method of optical film - Google Patents
Optical film, housing, terminal and preparation method of optical film Download PDFInfo
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C5/00—Processes for producing special ornamental bodies
- B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44F—SPECIAL DESIGNS OR PICTURES
- B44F1/00—Designs or pictures characterised by special or unusual light effects
- B44F1/02—Designs or pictures characterised by special or unusual light effects produced by reflected light, e.g. matt surfaces, lustrous surfaces
- B44F1/04—Designs or pictures characterised by special or unusual light effects produced by reflected light, e.g. matt surfaces, lustrous surfaces after passage through surface layers, e.g. pictures with mirrors on the back
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/0086—Casings, cabinets or drawers for electric apparatus portable, e.g. battery operated apparatus
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
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- Laminated Bodies (AREA)
Abstract
The disclosure relates to an optical film, a housing, a terminal and a method for manufacturing the optical film, wherein the optical film comprises a first optical layer with light transmission; and the second optical layer is arranged in a laminated manner with the first optical layer and is used for reflecting the light rays transmitted through the first optical layer towards the first optical layer or transmitting the light rays transmitted through the first optical layer. The present disclosure improves the stereoscopic impression of the texture layer using the first optical layer and the second optical layer.
Description
Technical Field
The disclosure relates to the technical field of terminals, in particular to an optical film, a shell, a terminal and a preparation method of the optical film.
Background
When terminals such as mobile phones and the like are manufactured, the film needs to be installed, so that visual experience obtained by users is enriched. However, the current terminal membrane mostly adopts textures such as a zero-dimensional lattice, a one-dimensional line, or a two-dimensional pattern. The texture visual experience of the film is single, after the terminal product with the film is used for many years, the attraction of the product to users is reduced, the competitiveness of the product is weakened, and the change and the demand of the market cannot be met.
Disclosure of Invention
The present disclosure provides an optical film, a housing, a terminal, and a method of manufacturing the optical film.
According to an embodiment of the first aspect of the present disclosure, there is provided an optical film including:
the first optical layer has light transmission;
and the second optical layer is arranged in a laminated manner with the first optical layer and is used for reflecting the light rays transmitted through the first optical layer towards the first optical layer or transmitting the light rays transmitted through the first optical layer.
In some embodiments, the optical film further comprises:
a textured layer located between the first optical layer and the second optical layer.
In some embodiments, the optical film further comprises;
a transparent substrate positioned between the texture layer and the first optical layer.
In some embodiments, the optical film further comprises:
the light incident surface of the shielding layer faces the second optical layer, and the second optical layer is located between the texture layer and the shielding layer.
In some embodiments, the optical transmittance of the first optical layer is greater than the optical transmittance of the second optical layer; and/or the presence of a gas in the gas,
the second optical layer has a reflectivity greater than a reflectivity of the first optical layer.
In some embodiments, the first optical layer and/or the second optical layer comprises: two sublayers are alternately stacked, and the refractive indices of the different sublayers are different.
In some embodiments, the first optical layer comprises: the multilayer structure comprises a first sublayer and a second sublayer which are distributed in a laminated manner, wherein the refractive indexes of the first sublayer and the second sublayer are different;
and/or the presence of a gas in the gas,
the second optical layer comprises; and the third sublayer and the fourth sublayer are distributed in a stacked mode, and the refractive indexes of the third sublayer and the fourth sublayer are different.
In some embodiments, the first optical layer comprises: a plurality of the first sub-layers and a plurality of the second sub-layers, the first sub-layers and the second sub-layers being alternately distributed; and/or;
the second optical layer includes: a plurality of the third sub-layers and a plurality of the fourth sub-layers, wherein the third sub-layers and the fourth sub-layers are alternately distributed.
In some embodiments, the occlusion layer comprises: and (4) an ink layer.
In some embodiments, the material of the transparent substrate comprises at least one of: polyethylene terephthalate, polyimide, polycarbonate, or flexible glass.
According to an embodiment of a second aspect of the present disclosure, there is provided a housing including:
a transparent housing having an outer surface and an inner surface opposite the outer surface; the outer surface is a light incident surface of the transparent shell;
the optical film of any of the above embodiments, wherein the first optical layer faces an inner surface of the transparent housing.
According to an embodiment of a third aspect of the present disclosure, there is provided a terminal including:
the housing of any of the above embodiments.
According to an embodiment of the third aspect of the present disclosure, there is provided a method of manufacturing an optical film, including:
forming a first optical layer;
forming a second optical layer in a stacked arrangement with the first optical layer;
the second optical layer is used for reflecting the light rays transmitted through the first optical layer towards the first optical layer or transmitting the light rays transmitted through the first optical layer.
In some embodiments, the method further comprises:
forming a texture layer; wherein the texture layer is located between the first optical layer and the first optical layer.
The method further comprises the following steps:
forming the first optical layer on a first surface of a transparent substrate;
forming the texture layer on the second surface of the transparent substrate; wherein the second surface is opposite the first surface.
In some embodiments, the forming the textured layer on the second surface of the transparent substrate comprises:
and printing or transferring the texture layer on the second surface of the transparent substrate.
In some embodiments, the method further comprises:
forming a shielding layer; the light incident surface of the shielding layer faces the second optical layer, and the second optical layer is located between the first optical layer and the shielding layer.
In some embodiments, the forming a masking layer comprises:
and printing to form the shielding layer.
The method further comprises the following steps:
plating forms the first optical layer and/or the second optical layer.
In some embodiments, the forming a first optical layer; the method comprises the following steps:
forming a first sub-layer;
forming a second sublayer laminated with the first sublayer; wherein the refractive indices of the first and second sublayers are different;
and/or, said forming said second optical layer comprises:
forming a third sub-layer;
forming a fourth sub-layer laminated with the third sub-layer; wherein the third sublayer and the fourth sublayer have different refractive indices.
In some embodiments, the first optical layer comprises: a plurality of the first sub-layers and a plurality of the second sub-layers, the first sub-layers and the second sub-layers being alternately distributed; and/or;
the second optical layer includes: a plurality of the third sub-layers and a plurality of the fourth sub-layers, wherein the third sub-layers and the fourth sub-layers are alternately distributed.
In some embodiments, the optical transmittance of the first optical layer is greater than the optical transmittance of the second optical layer; and/or the presence of a gas in the gas,
the second optical layer has a reflectivity greater than a reflectivity of the first optical layer.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
as can be seen from the above embodiments, the stereoscopic impression of the texture can be improved by using the first optical layer and the second optical layer in the present disclosure. Wherein the light transmissive first optical layer and/or second optical layer ensures that more light is transmitted to the texture. The arrangement of the two optical layers further improves the visual sense of the texture, the texture has a stereoscopic impression, the profound sense of the texture is further increased, the three-dimensional effect of the texture is further refined, the use experience of a user is improved, and the product competitiveness is increased.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is one of the schematic structural views of a housing shown in accordance with an exemplary embodiment;
FIG. 2 is a second schematic structural view of the housing shown in accordance with an exemplary embodiment;
FIG. 3 is a schematic flow diagram illustrating a method of making an optical film according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of devices consistent with certain aspects of the present disclosure, as detailed in the appended claims.
In the description of the present disclosure, it is to be understood that the terms "center", "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings.
An embodiment of the present disclosure provides an optical film, including:
the first optical layer 20 has light-transmitting properties;
and a second optical layer 40 stacked on the first optical layer 20 for reflecting the light transmitted through the first optical layer 20 toward the first optical layer 20 or transmitting the light transmitted through the first optical layer 20.
In some embodiments, the first optical layer 20 and the second optical layer 40 may be directly attached together, or there may be other functional layers between the first optical layer 20 and the second optical layer 30 that have light transmissive properties. Functional layers include, but are not limited to: a textured layer 30 having a texture. The texturing layer 30 may also not be distributed between the first optical layer 20 and the second optical layer 40. For example: the first optical layer 20 is positioned between the textured layer 30 and the second optical layer 40, or the second optical layer 40 is positioned between the first optical layer 20 and the textured layer 30.
In some embodiments, the second optical layer 40 has light transmissive properties, and the order in which the first optical layer 20 and the second optical layer 40 are stacked is not limited. For example: the light incident surface of the second optical layer 40 faces the first optical layer 20, that is, the first optical layer 20 is stacked above the second optical layer 40, and light is incident on the second optical layer 40 from the first optical layer 20; alternatively, the light incident surface of the first optical layer 20 faces the second optical layer 40, i.e., the second optical layer 40 is stacked above the first optical layer 20, and the light is incident on the first optical layer 20 from the second optical layer 40. At this time, both the first optical layer 20 and the second optical layer 40 may be an antireflection film. In addition to antireflection films (Lens), the first optical layer 20 and/or the second optical layer 40 may also be: a graded optical film or a color optical film or the like; the gradient optical film can be a gradient of color or a gradient of transparency. The colors of the colored optical film include, but are not limited to: red, blue, black, white, green, or the like.
In some embodiments, the second optical layer 40 has no optical transparency, e.g., the second optical layer 40 is a highly reflective film. At this time, the second optical layer 40 faces away from the light incident surface of the first optical layer 20.
Without limitation, the textured layer 30 may be formed by etching, printing, or transferring, among other ways.
For example: as shown in fig. 1 and 2, the texture layer 30 may be formed by using a raw material such as ink by UV (Ultraviolet) transfer, UV paste printing, ink printing, or the like.
In some embodiments, the texture comprises a textural biomimetic texture, i.e., a texture formed by referencing and simulating the textural texture and tissue structure specific attributes of a natural object surface. For example: the texture may be selected from at least one of: sandstone texture, concha texture, leather texture, snowflake texture, bark texture, etc. Besides the bionic texture, the bionic texture can also be patterns such as geometric patterns, logos, pictures or embossments, and can also be combinations of the bionic texture and the patterns.
In the embodiment of the present disclosure, the stereoscopic impression of the texture layer 30 can be improved by using the first optical layer and the second optical layer. The transparent first optical layer and/or the transparent second optical layer ensure that more light rays are incident on the texture of the texture layer, and the arrangement of the two optical layers further improves the appearance of the texture on the texture layer, so that the texture layer 30 has more stereoscopic impression and deep feeling, and the three-dimensional effect of the texture is further refined. Therefore, the three-dimensional visual experience of the optical film is increased by using the first optical layer 20 and the second optical layer 40, so that the use experience of a user is improved, and the product competitiveness is increased.
For example: when the texture is a biomimetic texture, the first optical layer 20 and the second optical layer 40 may make the texture more realistic, closer to nature of the texture simulation.
The texture layer 30 may be a single layer or multiple layers. When the terminal is applied, the thinner the texture layer 30 is, the better the terminal needs to be. The texture layer 30 thickness may be any one or between any two of 0.1 μm, 0.5 μm, 10 μm, 23 μm, 30 μm, 50 μm, 100 μm, 200 μm. For example: the texture layer 30 has a total thickness of 0.1 to 200 μm. For another example: the texture layer 30 has a total thickness of 23 μm to 33 μm.
Without limitation, the first optical layer 20 may be a coating layer formed by coating. Similarly, the second optical layer 40 may be a plated layer.
Without limitation, the thicknesses of the first and second optical layers 20 and 40, respectively, may be independently selected from one of: 5nm, 10nm, 60nm, 100nm, 500nm, 1000nm or any value in between. For example: the first optical layer 20 has a thickness of 5nm to 1000nm, or 5nm to 10nm, and the second optical layer 40 has a thickness of 60nm to 1000 nm.
In other alternative embodiments, the optical film further comprises:
a textured layer 30 positioned between the first optical layer 20 and the second optical layer 40.
The first optical layer 20 and the second optical layer 40 can respectively generate transmission or reflection effects on light rays at two sides of the texture layer 30, and compared with the way that the first optical layer 20 and the second optical layer 40 are arranged at the same side of the texture layer 30, the stereoscopic impression of the texture layer 30 can be further enhanced.
Without limitation, the first optical layer 20 may be formed directly on the light incident surface of the texture layer 30, and the second optical layer 40 may be formed on the light-exiting surface of the texture layer 30, wherein the light-exiting surface of the texture layer 30 is the opposite of the light incident surface of the texture layer 30. Alternatively, the second optical layer 40 is not formed directly on the backlight side of the texture layer 30, such as: other functional layers having light-transmitting properties are disposed between the first optical layer 20 and the texture layer 30, and/or between the texture layer 30 and the second optical layer 40.
In other alternative embodiments, the optical film further comprises;
a transparent substrate 10, the transparent substrate 10 being positioned between the textured layer 30 and the first optical layer 20.
In some embodiments, the optical film includes a transparent substrate 10, a first optical layer 20, a texturing layer 30, and a second optical layer 40, which are laminated; wherein the transparent substrate 10 is positioned between the first optical layer 20 and the texture layer 30; the textured layer 30 is positioned between the transparent substrate 10 and the second optical layer 40.
As shown in fig. 1 and 2, the first optical layer 20 and the texture layer 30 may be attached to opposite surfaces of the transparent substrate 10, respectively. At this time, the transparent substrate serves at least to support the texture layer and the first optical layer.
In some embodiments, the transparent substrate 10 is a flexible substrate. Compared with a rigid substrate, the flexible substrate can be smaller in volume and density, a thinner size can be obtained, the flexible substrate can be freely bent or folded, the fitting degree of the flexible substrate with a terminal shell can be improved, and the optical film can be more conveniently fitted and fixed with the terminal shell.
In other alternative embodiments, the material of the transparent substrate 10 includes at least one of: polyethylene terephthalate (PET), Polyimide (PI), Polycarbonate (PC), or flexible glass. The material has good flexibility, is beneficial to realizing the lightness and thinness of the optical film, and is convenient for the storage, transportation and use of the optical film.
It is understood that the material of the transparent substrate 10 can also be selected from other transparent materials, such as: for example, acrylic resin including polymethyl methacrylate (PMMA), Polyurethane (PU), polyvinyl chloride (PVC), acrylonitrile-butadiene-styrene copolymer (ABS), polyolefin such as Polyethylene (PE) or polypropylene (PP), and the like.
In embodiments of the present disclosure, "transparent" or "transparency" may be expressed as a transmittance of about 60% of visible light, or higher. For example: the light transmittance is 90%, 95% or more than 99%. It is understood that the better the transparency of the transparent substrate 10, the more beneficial it is to transmit light through the transparent substrate 10, and the more beneficial it is to ensure the optical properties of the texture layer 30 and the second optical layer 40 on the side of the transparent substrate 10, and to improve the stereoscopic impression of the texture layer 30.
In other alternative embodiments, the optical transmittance of the first optical layer 20 is greater than the optical transmittance of the second optical layer 40; and/or the presence of a gas in the atmosphere,
the reflectivity of the second optical layer 40 is greater than the reflectivity of the first optical layer 20.
In contrast, as shown in fig. 1 and fig. 2, the greater light transmittance of the first optical layer 20 is more favorable for more light to pass through the first optical layer 20 to reach the transparent substrate 10 and other layers, so as to ensure the optical performance of the structures of the layers below the first optical layer 20, and make the texture of the texture layer 30 clearer and more stereoscopic.
The reflectivity of the second optical layer 40 is greater than that of the first optical layer 20, which is beneficial for the reflection of the second optical layer 40 to the incident light, and the light reflected by the second optical layer 40 can be observed by a user through the texture layer 30 and the transparent substrate 10, thereby further improving the appearance of the texture and enabling the texture to be more delicate and have more three-dimensional effect.
In some embodiments, first optical layer 20 is an antireflective film and second optical layer 40 is a high reflectivity film. For example, the first optical layer 20 is a transparent layer, the second optical layer 40 is a non-transparent layer, and the second optical layer 40 has a reflectance to visible light much larger than that of the first optical layer 20. The light entering the second optical layer 40 through the first optical layer 20 can be almost totally reflected, the optical film with the structure can further make the boundary of the texture more obvious, further improve the 'suspension feeling' of the texture, and the texture is more delicate and has more stereoscopic impression.
In other alternative embodiments, the first optical layer 20 and/or the second optical layer 40 comprise:
the multilayer structure comprises a first sublayer and a second sublayer which are distributed in a laminated manner, wherein the refractive indexes of the first sublayer and the second sublayer are different;
and/or the presence of a gas in the atmosphere,
the second optical layer 40 includes; and the third sublayer and the fourth sublayer are distributed in a stacked mode, and the refractive indexes of the third sublayer and the fourth sublayer are different.
The two optical layers, namely the first optical layer 20 and the second optical layer 40, respectively include sub-layers with different refractive indexes, and in practical application, the sub-layers with different refractive indexes can be selected according to requirements, so that optical layers with different optical effects can be obtained.
In other alternative embodiments, the first optical layer 20 includes: a plurality of the first sub-layers and a plurality of the second sub-layers, the first sub-layers and the second sub-layers being alternately distributed; and/or;
the second optical layer 40 includes: a plurality of the third sub-layers and a plurality of the fourth sub-layers, wherein the third sub-layers and the fourth sub-layers are alternately distributed.
In the embodiment of the present disclosure, both of the first optical layer 20 and the second optical layer 40 may be a single-layer structure or a multi-layer structure. For example: the number of optical layers may be 1 to 100. In the multilayer structure, the optical layer is formed by two sublayers having different refractive indices alternately. Generally, the larger the number of layers, the better the antireflection effect or reflection increasing effect of the optical layer, and the more refined the effect of the texture layer 30. However, the total number of the optical layers may be 1 to 9 layers, or 1 to 5 layers, in consideration of the process feasibility and cost of industrial production.
Without limitation, in the first optical layer 20, the refractive index of the first sub-layer is smaller than the refractive index of the second sub-layer. For example: the first sub-layers and the second sub-layers are alternately laminated at one time, and the first sub-layers with smaller refractive indexes are close to the texture layer 30, so that the optical layer with the structure can obtain a better antireflection effect. In the second optical layer 40, the refractive index of the third sublayer is greater than the refractive index of the fourth sublayer. For example: the third sub-layer and the fourth sub-layer are alternately laminated at one time, and the third sub-layer with a larger refractive index is close to the texture layer, so that the optical layer with the structure can obtain a better reflection increasing effect.
Without limitation, the material of the second or third sub-layer having the higher refractive index includes at least one of: ZnS, or a mixture of ZnS and a metal oxide comprising at least one of: al (Al) 2 O 3 、ZrO 2 、Ti 2 O 5 、 TiO 2 、Nb 2 O 3 Or SiNx (where x may be 3/4), etc. The material of the first or fourth sub-layer having the lower refractive index comprises at least one of: metal fluoride or SiO 2 Including but not limited to: MgF 2 . The content of the metal fluoride is 0 at% to 100 at%, for example: the content of the metal fluoride is 0 at%, 10 at%, 20 at%, 50 at% or 100 at%.
In some embodiments, the materials of the second optical layer 40 include: SiO 2 2 And metal oxides. For example: the materials of the second optical layer 40 include: al (Al) 2 O 3 In the mixing ofIn which Al is 2 O 3 The weight percentage content of the (B) is between 0 and 10 percent. For example: al (Al) 2 O 3 The content of (b) is 1%, 5%, 9%, 10%, etc.
In other alternative embodiments, the optical film further comprises:
a shielding layer 50, the light incident surface of the shielding layer faces the second optical layer 40, and the second optical layer 40 is located between the texture layer 30 and the shielding layer
Without limitation, as shown in FIG. 1, a blocking layer 50 is attached to the second optical layer 40.
When the terminal shading layer 50 is applied to the terminal, the shading layer has a light shading effect, and isolates the optical film from internal structures in the terminal, so that the internal structures such as functional modules in the terminal can not be observed by a user through the optical film, and the texture impression is not influenced.
It is understood that the optical film may not include the blocking layer 50.
In some embodiments, as shown in FIG. 2, the second optical layer 40 is a non-transparent layer, and since light entering the second optical layer 40 is substantially opaque, light can be substantially reflected, the second optical layer 40 itself has a blocking effect, and the internal structure of the terminal end cannot be observed through the first optical layer 20, in which case the optical film may not include the blocking layer 40.
In some embodiments, as shown in fig. 1, the second optical layer 40 is a transparent layer, such as: the second optical layer 40 and the first optical layer 20 are antireflection films with the same structure. At this time, since the second optical layer 40 does not have a shielding effect, the shielding layer 50 is necessary.
Without limitation, the shielding layer 50 includes: and (4) an ink layer. A black, white or other color ink layer may be formed on the second optical layer 40 by screen printing or the like.
The disclosed embodiment also provides a housing, including:
a transparent housing 70 having an outer surface and an inner surface opposite the outer surface; wherein, the outer surface is a light incident surface of the transparent casing 70;
in the optical film of any of the above embodiments, the first optical layer 20 faces the inner surface of the transparent housing 70.
The optical film is located on the inner side of the transparent shell 70, and the transparent shell 70 has a protection effect on the optical film, so that the service life of the optical film is prolonged.
The transparent casing 70 may be, without limitation, a glass casing, or a plastic casing made of transparent resin.
In some embodiments, as shown in fig. 1 and 2, first optical layer 20 conforms to the inner surface of transparent housing 70. For example: the first optical layer 20 may be attached to the inner surface of the transparent housing 70 by an adhesive 60. The Adhesive 60 is, without limitation, an Optical Clear Adhesive (OCA), and the optical effect of the optical film can be effectively ensured because the optical transmittance of the Adhesive 60 is high.
The adhesive 60 includes, but is not limited to: silica gel, acrylic resin, epoxy resin, or the like.
In addition, another functional layer having light transmittance may be provided between the first optical layer 20 and the transparent housing 70.
An embodiment of the present disclosure further provides a terminal, including: the housing of any of the above embodiments.
In practical application, the terminal further comprises a functional module installed in the shell.
The terminal includes but is not limited to a mobile phone, a notebook, a tablet computer, a television or a wearable device, etc.
The functional module can be a module formed by combining one or more devices capable of executing preset functions. Illustratively, the functional modules include, but are not limited to: battery, speaker, camera or display module assembly etc..
The housing may be, without limitation, a front case, a rear case, a bezel, or the like of the terminal, and may also be, for example, a battery case, or the like of the terminal.
As shown in fig. 3, an embodiment of the present disclosure also provides a method for manufacturing an optical film, including:
step S101, forming a first optical layer 20; transparent substrate 10 first optical layer 20
Step S102, forming a second optical layer 40 which is distributed in a laminated mode with the first optical layer 20; the second optical layer 40 is configured to reflect light transmitted through the first optical layer 20 toward the first optical layer 20 or transmit light transmitted through the first optical layer 20.
Without limitation, the optical film in this embodiment has the same structure as the optical film in any of the embodiments described above.
In step S101, an optical coating may be formed on the transparent substrate by vacuum deposition or the like to form the first optical layer 20. Wherein the optical coating comprises metal fluoride and SiO 2 The transparent substrate includes: PET film, PI film, PC film, PU film, flexible glass, or the like. Or the first optical layer is a coating layer formed after the optical coating is cured.
In step S102, without limitation, the structure of the second optical layer 40 may be the same as that of the first optical layer 20. The second optical layer 40 may also be prepared in the same manner as the first optical layer 20. For example: plating forms the first optical layer 20 and/or the second optical layer 40.
The second optical layer 40 may be directly bonded to the first optical layer 20, or another functional layer having light transmittance may be further provided between the first optical layer 20 and the second optical layer 40.
In practical applications, the sequence of the preparation is not limited by the steps S101 and S102. It is also possible to form the second optical layer 40 first and then the first optical layer 20.
In other optional embodiments, the method further comprises:
forming a textured layer 30; wherein the textured layer 30 is located between the first optical layer 20 and the first optical layer 20.
Without limitation, the texture of the texture layer 30 may be formed by printing, transferring, or etching.
In other optional embodiments, the method further comprises:
forming the first optical layer 20 on a first surface of the transparent substrate 10;
forming the texture layer 30 on the second surface of the transparent substrate 10; wherein the second surface is opposite the first surface.
The first surface is a light incident surface of the transparent substrate 10.
Without limitation, the first optical layer 20 may be formed on the first surface of the transparent substrate 10 by coating or plating, or the texture layer 30 may be formed on the surface of the transparent substrate 1010 by UV (Ultraviolet) transfer, UV paste printing, ink printing, or the like.
In other optional embodiments, the method further comprises:
forming a shielding layer 50; the light incident surface of the blocking layer 50 faces the second optical layer 40, and the second optical layer 40 is located between the first optical layer 20 and the blocking layer.
The shielding layer 50 may be formed by printing, transferring, printing, coating, plating, or the like.
In some embodiments, the masking layer is formed by screen printing.
In other alternative embodiments, the forming of the first optical layer 20; the method comprises the following steps:
forming a first sub-layer;
forming a second sublayer laminated with the first sublayer; wherein the first and second sublayers have different refractive indices;
and/or, the forming the second optical layer 40 includes:
forming a third sub-layer;
forming a fourth sublayer laminated with the third sublayer; wherein the third sublayer and the fourth sublayer have different refractive indices.
In practical applications, the first sub-layer is first plated, and then the second sub-layer is plated on the first sub-layer to form the first optical layer 20. The second optical layer 40 may also be plated to form a third sublayer and a fourth sublayer, respectively, in the same manner.
In other alternative embodiments, the first optical layer 20 includes: a plurality of the first sub-layers and a plurality of the second sub-layers, the first sub-layers and the second sub-layers being alternately distributed; and/or;
the second optical layer 40 includes: a plurality of the third sub-layers and a plurality of the fourth sub-layers, wherein the third sub-layers and the fourth sub-layers are alternately distributed.
In other alternative embodiments, the optical transmittance of the first optical layer 20 is greater than the optical transmittance of the second optical layer 40; and/or the reflectivity of the second optical layer 40 is greater than the reflectivity of the first optical layer 20.
In contrast, as shown in fig. 1 and fig. 2, the greater light transmittance of the first optical layer 20 is more favorable for more light to pass through the first optical layer 20 to reach the transparent substrate 10 and other layers, so as to ensure the optical performance of the structures of the layers below the first optical layer 20, and make the texture of the texture layer 30 clearer and more stereoscopic.
The reflectivity of the second optical layer 40 is greater than that of the first optical layer 20, which is beneficial to the reflection of the second optical layer 40 to the incident light, and the light reflected by the second optical layer 40 can be observed by a user through the texture layer 30 and the transparent substrate 10, so that the appearance of the texture is further improved, and the texture is more delicate and has more three-dimensional effect.
In a specific example, the optical film is applied to a mobile phone including a battery case, a battery, and a frame body having a receiving compartment for receiving the battery, the battery case covering the receiving compartment. The battery case comprises a glass shell and an optical film, wherein the optical film is positioned between the inner surface of the glass shell and the battery, and the first optical layer 20 is attached to the inner surface of the transparent shell 70. The manufacturing process of the battery case is approximately as follows: firstly, cleaning flexible materials such as PET (polyethylene terephthalate), PI (polyimide), PC (polycarbonate), ultrathin glass and the like serving as substrates of a three-dimensional bionic film (namely an optical film), recording three-dimensional bionic textures on one or more surfaces of the flexible substrates by methods such as UV (ultraviolet) transfer printing, UV adhesive printing, ink printing and the like to form texture layers, and considering the extremely-induced requirements of the cellphone ultra-thinning and the three-dimensional bionic textures (namely textures on the texture layer 30) on the stereoscopic impression, wherein the thickness of the texture layer 30 is 23-30 mu m; the texture may be one or more of sandstone texture, concha texture, snowflake texture, bark texture, etc. Next, a second optical layer 40 is coated on the texture layer 30 by a vacuum coating method. Wherein the second optical layer 40 is of low refractive indexAnd 5 layers of thin films in which the thin films and the high refractive index thin films are alternately laminated. The coating parameters are approximately: background vacuum 1X 10 -5 ～5×10 -5 Pa, the substrate temperature is 20-200 ℃, the coating time is 1-60 min, the working atmosphere is an atmosphere containing oxygen, argon and hydrogen (or water vapor), the working pressure is 0.5-5 Pa, and the sputtering power density is 1-300W/cm 2 . The ratio of hydrogen (or water vapor) to oxygen is 10-30% vol. After the first optical layer 20 is deposited, the first optical film is heated in a vacuum chamber to remove water vapor or hydrogen, the vacuum degree is set at 1 × 10 -5 ～5×10 -5 Pa, the heating temperature is set to be 80-150 ℃, and the time is 10-30 min. Subsequently, an ink layer is silk-screened on the second optical layer 40. For the stereoscopic impression of the three-dimensional bionic film, the other side of the flexible substrate is further coated with a first optical layer 20 by a vacuum coating method, and the material of the first optical layer 20 comprises SiO 2 And Al 2 O 3 In which Al is 2 O 3 The content of (B) is between 0 and 10 percent by mass. Then, an adhesive glue (i.e., adhesive 60) is applied to the surface of the second optical layer 40, and the optical film is bonded to the inner surface of the glass housing by the adhesive glue, as shown in fig. 1.
The features disclosed in the several product embodiments provided in this disclosure may be combined in any combination to yield new product embodiments without conflict.
The features disclosed in the several method embodiments provided in this disclosure may be combined in any combination without conflict to arrive at a new product embodiment.
The features disclosed in the several product embodiments and method embodiments provided in this disclosure may be combined in any combination to yield new product embodiments or method embodiments without conflict.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (21)
1. An optical film, comprising:
the first optical layer has light transmission;
and the second optical layer is arranged in a laminated manner with the first optical layer and is used for reflecting the light rays transmitted through the first optical layer towards the first optical layer or transmitting the light rays transmitted through the first optical layer.
2. The optical film of claim 1, further comprising:
a textured layer located between the first optical layer and the second optical layer.
3. The optical film of claim 2, further comprising;
a transparent substrate positioned between the texture layer and the first optical layer.
4. The optical film of claim 3, further comprising:
the light incident surface of the shielding layer faces the second optical layer, and the second optical layer is located between the texture layer and the shielding layer.
5. The optical film of claim 1,
the light transmittance of the first optical layer is greater than that of the second optical layer; and/or the presence of a gas in the gas,
the second optical layer has a reflectivity greater than a reflectivity of the first optical layer.
6. The optical film of claim 1, wherein the first optical layer comprises: a first sublayer and a second sublayer which are distributed in a stacked mode, wherein the refractive indexes of the first sublayer and the second sublayer are different;
and/or the presence of a gas in the gas,
the second optical layer comprises; and the third sublayer and the fourth sublayer are distributed in a stacked mode, and the refractive indexes of the third sublayer and the fourth sublayer are different.
7. The optical film of claim 6, wherein the first optical layer comprises: a plurality of the first sub-layers and a plurality of the second sub-layers, the first sub-layers and the second sub-layers being alternately distributed; and/or;
the second optical layer includes: a plurality of the third sub-layers and a plurality of the fourth sub-layers, the third sub-layers and the fourth sub-layers being alternately distributed.
8. The optical film according to claim 4, wherein the blocking layer comprises: and (4) an ink layer.
9. The optical film of claim 3, wherein the material of the transparent substrate comprises at least one of: polyethylene terephthalate, polyimide, polycarbonate, or flexible glass.
10. A housing, comprising:
a transparent housing having an outer surface and an inner surface opposite the outer surface; the outer surface is a light incident surface of the transparent shell;
the optical film of any one of claims 1-9, the first optical layer facing an inner surface of the transparent housing.
11. A terminal, comprising: the housing of claim 10.
12. A method of making an optical film, comprising:
forming a first optical layer;
forming a second optical layer in a stacked arrangement with the first optical layer;
the second optical layer is used for reflecting the light rays transmitted through the first optical layer towards the first optical layer or transmitting the light rays transmitted through the first optical layer.
13. The method of claim 12, further comprising:
forming a texture layer; wherein the texture layer is located between the first optical layer and the first optical layer.
14. The method of manufacturing an optical film according to claim 13, further comprising:
forming the first optical layer on a first surface of a transparent substrate;
forming the texture layer on the second surface of the transparent substrate; wherein the second surface is opposite the first surface.
15. The method of claim 14, wherein the forming the textured layer on the second surface of the transparent substrate comprises:
and printing or transferring the texture layer on the second surface of the transparent substrate.
16. The method of manufacturing an optical film according to claim 14, further comprising:
forming a shielding layer; the light incident surface of the shielding layer faces the second optical layer, and the second optical layer is located between the first optical layer and the shielding layer.
17. The method for manufacturing an optical film according to claim 16, wherein the forming of the blocking layer includes:
and printing to form the shielding layer.
18. The method of claim 12, further comprising:
plating forms the first optical layer and/or the second optical layer.
19. The method of manufacturing an optical film according to claim 12, wherein the forming a first optical layer; the method comprises the following steps:
forming a first sub-layer;
forming a second sublayer laminated with the first sublayer; wherein the refractive indices of the first and second sublayers are different;
and/or, the forming the second optical layer comprises:
forming a third sub-layer;
forming a fourth sub-layer laminated with the third sub-layer; wherein the third sublayer and the fourth sublayer have different refractive indices.
20. The method of claim 19, wherein the first optical layer comprises: a plurality of the first sub-layers and a plurality of the second sub-layers, the first sub-layers and the second sub-layers being alternately distributed; and/or;
the second optical layer includes: a plurality of the third sub-layers and a plurality of the fourth sub-layers, wherein the third sub-layers and the fourth sub-layers are alternately distributed.
21. The method of claim 12, wherein the first optical layer has a light transmittance greater than that of the second optical layer; and/or the presence of a gas in the gas,
the second optical layer has a reflectivity greater than a reflectivity of the first optical layer.
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| CN202110190392.2A CN114980593A (en) | 2021-02-18 | 2021-02-18 | Optical film, housing, terminal and preparation method of optical film |
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| CN107205328A (en) * | 2017-07-21 | 2017-09-26 | 广东欧珀移动通信有限公司 | Terminal enclosure, electronic equipment and terminal enclosure processing technology |
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