CN113703210A

CN113703210A - Diaphragm and preparation method thereof, shell and electronic equipment

Info

Publication number: CN113703210A
Application number: CN202110910047.1A
Authority: CN
Inventors: 戚泽万
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2021-11-26
Also published as: WO2023016154A1

Abstract

The application discloses a diaphragm and a preparation method thereof, a shell and electronic equipment, and belongs to the technical field of diaphragms. In the diaphragm, a liquid crystal layer is provided with a preset liquid crystal pattern consisting of oriented liquid crystal, and the preset liquid crystal pattern is configured to be formed by photo-crosslinking type high polymer liquid crystal through photo-alignment under the arrangement of a photomask cover provided with the preset pattern; the optical film layer and the liquid crystal layer are arranged in a laminated mode. The method can ensure that the preparation of the liquid crystal layer is not limited by the steps of the preparation method of the diaphragm; in addition, the oriented liquid crystal can reflect the entering light, so that the brightness of the membrane is improved, and the wavelength of the reflected light is changed along with the change of the incident angle of the incident light; moreover, the shell with the diaphragm can present colors by presetting the liquid crystal patterns, so that the presenting effect of the shell is enriched.

Description

Diaphragm and preparation method thereof, shell and electronic equipment

Technical Field

The application belongs to the technical field of diaphragms, and particularly relates to a diaphragm, a preparation method of the diaphragm, a shell and electronic equipment.

Background

Currently, due to the demands of various aspects, tools, equipment and the like used by people in daily production and life are mostly provided with films.

In the prior art, most of the diaphragms for changing the appearance colors and patterns are simply coated with texture layers on diaphragm substrates, and with the continuous development of the industry, the diaphragms prepared by only coating the texture layers on the diaphragm substrates have single effects of displaying colors, patterns and the like, and cannot meet the increasing requirements of users.

Disclosure of Invention

The application provides a diaphragm, includes:

the liquid crystal display device comprises a liquid crystal layer and a liquid crystal layer, wherein the liquid crystal layer is provided with a preset liquid crystal pattern formed by oriented liquid crystal, and the preset liquid crystal pattern is configured to be formed by photo-crosslinking type high polymer liquid crystal through photo-controlled orientation under the arrangement of a photomask cover provided with the preset pattern; and

and the optical film layer is stacked with the liquid crystal layer.

In order to solve the above technical problem, another technical solution adopted by the present application is: a housing, comprising:

a base for transmitting light; and

the diaphragm is fixed on one side of the base body and is arranged in a stacking mode with the base body.

In order to solve the above technical problem, another technical solution adopted by the present application is: an electronic device, comprising:

the above-mentioned housing; and

and the display module is arranged on the shell.

In order to solve the above technical problem, another technical solution adopted by the present application is: a method of making a membrane, comprising:

coating photo-crosslinking type high molecular liquid crystal liquid on the transfer film and performing photo-control orientation to manufacture at least one liquid crystal layer with a preset liquid crystal pattern;

and laminating the at least one liquid crystal layer and the optical film layer according to the preset number of layers and the preset laminating position.

In the scheme, the liquid crystal layer is formed by photo-crosslinking type high polymer liquid crystal through photo-alignment, so that the preparation of the liquid crystal layer is not limited by the steps of the diaphragm preparation method, and a large number of liquid crystal layers with preset liquid crystal patterns can be prepared simultaneously or in advance for direct use in the preparation process of the diaphragm; in addition, the oriented liquid crystal can reflect the entering light, so that the brightness of the membrane is improved, and the wavelength of the reflected light is changed along with the change of the incident angle of the incident light; moreover, the shell with the diaphragm can present colors by presetting the liquid crystal patterns, so that the presenting effect of the shell is enriched.

Drawings

FIG. 1 discloses a front view of an electronic device according to an embodiment of the present application;

FIG. 2 discloses a rear view of an electronic device according to an embodiment of the present application;

FIG. 3 is a schematic view of the housing of the embodiment of FIG. 2;

FIG. 4 discloses a cross-sectional view of the housing taken along line III-III of the embodiment of FIG. 3 of the present application;

FIG. 5 is a schematic diagram of the diaphragm of the embodiment of FIG. 3 of the present application;

FIG. 6 is a schematic diagram of another embodiment of a diaphragm according to the present application shown in FIG. 5;

FIG. 7 is a schematic diagram of another embodiment of a diaphragm according to the present application shown in FIG. 5;

FIG. 8 is a schematic view of another embodiment of a diaphragm according to the present application shown in FIG. 5;

FIG. 9 is a schematic view of another embodiment of a diaphragm according to the present application shown in FIG. 5;

FIG. 10 is a schematic view of another embodiment of a diaphragm according to the present application shown in FIG. 8;

FIG. 11 is a schematic view of another embodiment of a diaphragm according to the present application shown in FIG. 5;

FIG. 12 is a flow chart illustrating a method for manufacturing a membrane according to an embodiment of the present disclosure;

FIG. 13 is a schematic view of a process for fabricating a liquid crystal layer according to an embodiment of the present application;

FIG. 14 discloses a flowchart of step S1202 in the embodiment of FIG. 12;

FIG. 15 is a graph showing the reflectivity of the diaphragm for various wavelengths of visible light according to an embodiment of the present application.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive work are within the scope of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

An electronic device is set forth having a housing. The shell can show any pattern gradient color effect, the color can show different effects when the angle is changed, and the color also has high reflective metal texture.

As used herein, "electronic equipment" (which may also be referred to as a "terminal" or "mobile terminal" or "electronic device") includes, but is not limited to, devices that are configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A cellular phone is an electronic device equipped with a cellular communication module.

Referring to fig. 1, a front view of an electronic device according to an embodiment of the present application is disclosed. The electronic device 100 may be any of a number of electronic devices including, but not limited to, cellular phones, smart phones, other wireless communication devices, personal digital assistants, audio players, other media players, music recorders, video recorders, cameras, other media recorders, radios, medical devices, calculators, programmable remote controllers, pagers, netbook computers, Personal Digital Assistants (PDAs), Portable Multimedia Players (PMPs), moving picture experts group (MPEG-1 or MPEG-2), audio layer 3(MP3) players, portable medical devices, and digital cameras and combinations thereof.

Referring to fig. 1 and fig. 2, fig. 2 discloses a rear view of an electronic device 100 according to an embodiment of the present application. The electronic device 100 may include a housing assembly 200 having an accommodating space, a display module 300 carried on the housing assembly 200, and a front camera 400 and a rear camera 500 disposed in the accommodating space. The accommodating space in the housing assembly 200 can be used for carrying electronic components such as a circuit board, a battery, various sensors, the front camera 400, the rear camera 500, and the like. The display module 300 can be used for displaying messages, image information, and the like. The front camera 400 may be located under the display module 300, and the light is incident to the front camera 400 through the display module 300. So as to realize the functions of shooting and taking pictures. The rear camera 500 can be installed in the through hole 201 (see fig. 3) of the housing assembly 200, and can be used for realizing the camera shooting and photographing functions. In other embodiments, the electronic device 100 may omit at least one of the display module 300, the front camera 400, and the rear camera 500.

The housing assembly 200 may include a middle frame 10 for carrying the display module 300 on one side and a housing 20 mounted on the other side of the middle frame 10. Wherein, the middle frame 10 and the shell 20 enclose to form an accommodating space. The display module 300 is disposed opposite to the housing 20. Referring to fig. 2 and 3 together, fig. 3 discloses a schematic structural diagram of the housing 20 in the embodiment shown in fig. 2 of the present application. The housing 20 is opened with a through hole 201 to mount the rear camera 500 at the through hole 201. In one embodiment, the middle frame 10 and the housing 20 may be a unitary structure, such that the middle frame 10 and the housing 20 form a unitary structure, and may be collectively referred to as a "housing". In one embodiment, the middle frame 10 may be omitted, and the display module 300 is formed on the housing 20.

Referring to fig. 4, fig. 4 discloses a cross-sectional view taken along line iii-iii of the housing 20 according to the embodiment of fig. 3. The housing 20 may include a base 30 and a diaphragm 40 disposed on a side of the base 30 facing the receiving space. Wherein the base 30 is arranged in a stack with the membrane 40. When light passes through the substrate 30 and irradiates the membrane 40, the housing 20 can exhibit a gradient color effect of any pattern, and the color can exhibit different effects by changing angles, and the color also has a high reflective metal texture.

The material of the substrate 30 may be glass, plastic, or a composite material of glass, plastic and metal, ceramic, etc. which can transmit light. In an embodiment, the material of the substrate 30 may be a composite plate of Polycarbonate (PC) and Polymethyl Methacrylate (PMMA), and specifically may be a composite plate made by co-extruding PC and PMMA particles. In one embodiment, the substrate 30 may be transparent in whole or in part. In one embodiment, the surface of substrate 30 on at least the side away from membrane 40 may be frosted. In one embodiment, at least the surface of substrate 30 on the side away from membrane 40 may be matte with a haze of 65-85%. In one embodiment, the substrate 30 may be translucent. Of course, the transparency of the substrate 30 can be adjusted to the actual requirements.

It is understood that the material of the substrate 30 may be other materials, and will not be described in detail.

In one embodiment, substrate 30 may comprise an electrochromic device. For example, electrochromic devices may be made using electrochromic materials. The electrochromic material may be one of an inorganic electrochromic material and an organic electrochromic material. The inorganic electrochromic material may be tungsten trioxide. The organic electrochromic material can be one of polythiophene and derivatives thereof, viologen, tetrathiafulvalene, metal phthalocyanine compounds and the like. Of course, the electrochromic material can be manufactured by the technical solutions existing in the prior art within the scope understood by those skilled in the art, and will not be described in detail.

In one embodiment, the matrix 30 may include a photochromic device. For example, the photochromic device can be made of a photochromic material, so that the photochromic device can change color after being excited by light with a certain wavelength. The photochromic material can be prepared by the technical scheme existing in the prior art within the understanding range of the skilled person, and the detailed description is omitted.

The membrane 40 is laminated with the base 30. In one embodiment, membrane 40 may be bonded to substrate 30. In one embodiment, membrane 40 may be bonded to substrate 30 by glue (e.g., Clear adhesive (OCA)), UV glue (shadowless glue, photosensitive glue, UV curable glue, Ultraviolet glue).

Referring to fig. 4 and 5, fig. 5 is a schematic structural diagram of the diaphragm 40 in the embodiment shown in fig. 4. The film 40 may include a film substrate 41 stacked on the base 30, and a first liquid crystal layer 42, a second liquid crystal layer 43, a texture layer 44, a reflective layer 45, and a primer layer 46 disposed on a side of the film substrate 41 away from the base 30. The film substrate 41, the first liquid crystal layer 42, the second liquid crystal layer 43, the texture layer 44, the reflective layer 45, and the primer layer 46 are stacked.

It is noted that the terms "first", "second", etc. are used herein and hereinafter for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the described features.

It is to be understood that the names "first liquid crystal layer", "second liquid crystal layer", and "liquid crystal layer" may be interchanged in some embodiments. For example, in one embodiment, "the first liquid crystal layer" in other embodiments is referred to as "the second liquid crystal layer", and accordingly, "the second liquid crystal layer" in other embodiments is referred to as "the first liquid crystal layer".

The membrane substrate 41 may be a film made of a polymer material with certain flexibility, the specific material may be Polyethylene terephthalate (PET), and in some application scenarios, the specific material may also be Polyvinyl chloride (PVC), thermoplastic polyurethane elastomer rubber (TPU), and the like, and in some scenarios, the membrane substrate 41 may also be a transparent material such as a PC-PMMA composite board, transparent plastic, transparent leather, glass, and the like, and the specific material is not limited specifically here.

In some embodiments, the membrane substrate 41 may be the same material as the matrix 30. Either one of the membrane substrate 41 and the base 30 may be omitted. Referring to fig. 6, fig. 6 discloses a schematic structural diagram of another embodiment of the diaphragm 40 in the embodiment shown in fig. 5. The membrane substrate 41 is omitted from the membrane 40.

In one embodiment, the diaphragm substrate 41 can have the functions of preventing the housing from bursting and fixing housing debris, so the diaphragm 40 can also be used as a rupture disk, and the diaphragm substrate 41 can be referred to as a rupture disk main body. Of course, in certain embodiments, the membrane substrate may also be referred to as an explosion proof membrane.

In one embodiment, the membrane substrate 41 has a thickness of 30-70 μm. In one embodiment, the membrane substrate 41 has a thickness of one of 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, and 71 μm. The overall thickness of the diaphragm 40 can be controlled by controlling the thickness of the diaphragm substrate 41, so that the diaphragm 41 becomes light and thin, and in addition, the diaphragm substrate 41 has a better elastic deformation performance.

In one embodiment, the membrane substrate 41 has a length of 420mm and a width of 300 mm. The large-scale membrane 40 can be manufactured in batches in the production and manufacturing process, and when the membrane 40 is used, the membrane 40 is cut into preset specifications according to the requirements of specific equipment so as to be used.

The first liquid crystal layer 42 may be disposed on one side of the film substrate 41. For example, the first liquid crystal layer 42 may be disposed on the side of the film substrate 41 away from the substrate 30. In one embodiment, please refer to fig. 7, which discloses a schematic structural diagram of another embodiment of the diaphragm 40 in the embodiment shown in fig. 5. The first liquid crystal layer 42 may be attached to one side of the film substrate 41. For example, the membrane 40 is bonded to the membrane substrate 41 through the first adhesive layer 401. In an embodiment, the first adhesive layer 401 may be a transparent optical adhesive or a UV adhesive. In one embodiment, the UV glue may include a modified acrylic resin. In one embodiment, the thickness of the first lamination layer 401 is 10-15 μm. Under the condition that the bonding strength of the first bonding layer 401 is not affected, the thickness of the first bonding layer 401 is reduced, and the influence of the first bonding layer 401 on the light transmission effect of the diaphragm 40 is reduced. In an embodiment, the thickness of the first lamination layer 401 is one of 10 μm, 11 μm, 12 μm, 13 μm, 14 μm and 15 μm.

In one embodiment, the first liquid crystal layer 42 may comprise aligned liquid crystals. In one embodiment, the first liquid crystal layer 42 is provided with a first predetermined liquid crystal pattern composed of aligned liquid crystals.

In one embodiment, the first liquid crystal layer 42 may include cholesteric liquid crystals.

It should be noted that, on the one hand, the incident light entering the first liquid crystal layer 42 can be reflected by the oriented liquid crystal, thereby improving the brightness and glossiness of the entire film 40; on the other hand, the oriented liquid crystal reflects light to make the reflected light show a certain main color, and the wavelength of the reflected light is different with the change of the incident angle of the incident light, so that when the observation angle of a user is different, the observed color shown by the first liquid crystal layer 42 is red-shifted or blue-shifted with the change of the observation angle, and the whole film 40 has a dazzling effect.

In one embodiment, the first liquid crystal layer 42 is formed by aligning photo-crosslinkable polymer liquid crystal by photo-alignment technique. In one embodiment, the photo-crosslinkable polymer liquid crystal may include a photo-crosslinkable alignment agent, a polymerizable monomer, a nematic liquid crystal, a chiral compound, and a photoinitiator. In one embodiment, the photo-crosslinkable alignment agent may include one or more of photo-crosslinkable materials such as cinnamates, coumarins, styrylpyridines, styrylbenzopyrrolidones, diphenylacetylenes, and the like. In one embodiment, the photo-crosslinking type alignment agent can be a cinnamate-based material. In an embodiment, the polymerizable monomer may be one or more of acrylate, isobornyl acrylate, tetrahydrofuran acrylate, and the like. In one embodiment, the photoinitiator may be one or more of thioxanthone photoinitiators, (2, 4, 6-trimethylbenzoyl) diphenylphosphine oxide, 1-hydroxycyclohexylphenone, 2 methyl-1- [4- (methylthio) phenyl ] -2- (4-morpholinyl) -1-propanone, and the like.

In some embodiments, the photo-crosslinking type polymeric liquid crystal may further include an ultraviolet light absorber, etc.

In one embodiment, the wavelength of the reflected light reflected by the liquid crystals in the first liquid crystal layer 42 satisfies the following equation: λ ═ 2npsin θ, where λ is the wavelength of the reflected light, n is the average refractive index of the aligned liquid crystal, p is the pitch of the aligned liquid crystal, and θ is the angle between the incident light and the surface of the liquid crystal layer, i.e., the complementary angle of the incident light. The aligned liquid crystals can be aligned according to a corresponding pitch p, and the alignment direction of the pitch p is determined by the light curing energy.

In one embodiment, photo-alignment is performed by covering photo-cross-linked polymer liquid crystal with a mask having a predetermined pattern. The photomask is made of quartz glass and can be prepared through the steps of chromium plating, glue homogenizing, developing, etching and the like, the photomask comprises a light resistance area, a semi-light-transmitting area and a full-light-transmitting area which form preset patterns, and the size and the shape of each area can be customized. By utilizing the function of the photomask for selectively transmitting ultraviolet light, due to the existence of the preset pattern of the photomask, the ultraviolet light energy passing through different areas of the photomask is different, so that the liquid crystal in the photo-crosslinking polymer liquid crystal is oriented, the preset pattern on the photomask is transferred to the first liquid crystal layer 42, and the first preset liquid crystal pattern which is formed by the oriented liquid crystal and is the same as the preset pattern is formed.

As the observation angle of the user changes, the incident angle of the incident light reflected by the first liquid crystal layer 42 and entering the eyes of the user changes, and θ changes, so that the wavelength λ of the reflected light reflected by the first liquid crystal layer 42 also changes accordingly, thereby changing the color of the reflected light. Therefore, when the observation angles of the users are different, the observed colors of the liquid crystal can generate the effect of changing with the colors, and the dazzling effect is generated. That is, the first liquid crystal layer 42 may have a pattern customized arbitrarily, may have an effect of exhibiting a difference in angle change, and may have a highly reflective metallic texture in color, thereby producing a dazzling effect.

In one embodiment, the thickness of the first liquid crystal layer 42 is 2-3 μm to enhance the color glare of the reflected light and to improve the display effect of the texture layer 44. In one embodiment, the thickness of the first liquid crystal layer 42 is one of 2 μm, 2.3 μm, 2.5 μm, 2.8 μm, and 3 μm.

In one embodiment, please refer to fig. 8, which discloses a schematic structural diagram of another embodiment of the diaphragm 40 in the embodiment shown in fig. 5. The first liquid crystal layer 42 may be disposed between the base 30 and the film substrate 41. The substrate 30, the first liquid crystal layer 42, and the film substrate 41 are stacked in this order. In one embodiment, the first liquid crystal layer 42 can be bonded to the substrate 30 and the film substrate 41 respectively. For example, they may be bonded together by glue (e.g., clear optical glue, UV glue, etc.).

The second liquid crystal layer 43 may have substantially the same structure, thickness and manufacturing manner as the first liquid crystal layer 42, and refer to the description of the first liquid crystal layer 42. The second predetermined liquid crystal pattern composed of aligned liquid crystals in the second liquid crystal layer 43 may be the same as or different from the first predetermined liquid crystal pattern. Of course, the second liquid crystal layer 43 may also have a different manufacturing method, structure, polymer liquid crystal liquid and thickness from the first liquid crystal layer 42, which is not described herein again. Only the positional relationship and the connection relationship between the second liquid crystal layer 43 and the other stacked structures in the diaphragm 40 will be described here.

It is to be understood that the names of the "first predetermined liquid crystal pattern", the "second predetermined liquid crystal pattern", and the "predetermined liquid crystal pattern" may be mutually switched in some embodiments. For example, in one embodiment, the "first predetermined liquid crystal pattern" in other embodiments is referred to as a "second predetermined liquid crystal pattern", and correspondingly, the "second predetermined liquid crystal pattern" in other embodiments is referred to as a "first predetermined liquid crystal pattern".

Referring to fig. 5 again, the second liquid crystal layer 43 may be disposed on a side of the first liquid crystal layer 42 away from the film substrate 41. In one embodiment, referring to fig. 7, the second liquid crystal layer 43 can be adhered to the first liquid crystal layer 42 on a side away from the film substrate 41. For example, the second liquid crystal layer 43 is bonded to the first liquid crystal layer 42 by the second adhesive layer 402. In an embodiment, the second adhesive layer 402 may be a transparent optical adhesive or a UV adhesive. In one embodiment, the UV glue may be a modified acrylic resin. In one embodiment, the second lamination layer 402 has a thickness of 10-15 μm. Under the condition that the bonding strength of the second bonding layer 402 is not affected, the thickness of the second bonding layer 402 is reduced, and the influence of the first bonding layer 401 on the light transmission effect of the diaphragm 40 is reduced. In an embodiment, the thickness of the second lamination layer 402 is one of 10 μm, 11 μm, 12 μm, 13 μm, 14 μm and 15 μm.

Please refer to fig. 8. The second liquid crystal layer 43 may be disposed on a side of the film substrate 41 away from the first liquid crystal layer 42. In one embodiment, the second liquid crystal layer 43 may be bonded to one side of the film substrate 41. For example, the second liquid crystal layer 43 is bonded to the film substrate 41 via the second adhesive layer 402.

It is to be understood that the number of the liquid crystal layers, for example, the first liquid crystal layer 42 and the second liquid crystal layer 43, may be at least one, and may not be limited to only the first liquid crystal layer 42 and the second liquid crystal layer 43. As for the arrangement position and arrangement manner of the liquid crystal layer, the first liquid crystal layer 42 and the second liquid crystal layer 43 can be referred to. Of course, the number of the liquid crystal layers, for example, the first liquid crystal layer 42 and the second liquid crystal layer 43, may be plural. Referring to fig. 9, fig. 9 discloses a schematic structural diagram of another embodiment of the diaphragm 40 in the embodiment shown in fig. 5. The second liquid crystal layer 43 is omitted from the diaphragm 40.

Referring again to fig. 5, the texture layer 44 may have a texture pattern, so that the membrane 40 can further exhibit a texture effect. The texture layer 44 may be provided on the side of the second liquid crystal layer 43 remote from the first liquid crystal layer 42.

The texture layer 44 material may be UV glue, and the texture layer 44 may be formed by UV transfer or the like. Specifically, the texture layer 44 may be formed by UV texture transfer on the first liquid crystal layer 42 or on the transfer film, depending on the particular application scenario. In some scenarios, the texture layer 44 on the transfer film may be removed and the texture layer 44 bonded to the second liquid crystal layer 43 by a third bonding layer, such as clear optical glue or UV glue.

It is understood that the names of "first adhesion layer", "second adhesion layer", "third adhesion layer", and "adhesion layer" may be interchanged in some embodiments. For example, in one embodiment, the "first conforming layer" in other embodiments is referred to as a "second conforming layer", and correspondingly, the "second conforming layer" in other embodiments is referred to as a "first conforming layer".

In order to ensure the texture effect and the adhesion exhibited by the texture layer 44, the thickness of the texture layer 44 in the present embodiment may be 7 to 9 μm, specifically, 7 μm, 7.5 μm, 8 μm, 8.5 μm, 9 μm, or the like.

In one embodiment, referring to fig. 10, fig. 10 discloses a schematic structural diagram of another embodiment of the diaphragm 40 shown in fig. 8 of the present application. The texture layer 44 may be disposed between the substrate 30 and the film substrate 41 along with the first liquid crystal layer 42. And a texture layer 44 may be disposed between the substrate 30 and the first liquid crystal layer 42.

It will be appreciated that in some embodiments, the texture layer 44 may be omitted. Referring to fig. 11, fig. 11 discloses a schematic structural diagram of another embodiment of the diaphragm 40 in the embodiment shown in fig. 5. The textured layer 44 is omitted from the membrane 40.

Referring to fig. 5 again, the reflective layer 45 may be disposed on a side of the texture layer 44 away from the film substrate 41 for reflecting incident light, so that the reflected light can pass through the first liquid crystal layer 42 and the second liquid crystal layer 43, and the predetermined liquid crystal pattern can exhibit a brighter colorful effect.

The reflective layer 45 may be a layer of optical film or a plurality of layers of optical film sequentially stacked on the texture layer 44 and fixedly connected to each other. The reflective layer 45 may be formed by any one of vapor deposition, continuous line sputtering, or furnace sputtering. The material of the reflective layer 45 may be Nb₂O₅、Al₂O₃、TiO₂And SiO₂One or more of (a).

In one embodiment, the thickness of the reflective layer 45 is 150 nm and 800nm to change the reflective effect of the reflective layer 45, so that the reflective layer 45 reflects better light, and the light passes through the first liquid crystal layer 42 and the second liquid crystal layer 43 to exhibit a dazzling effect.

In one embodiment, the thickness of the reflective layer 45 is 150 nm and 500 nm.

In one embodiment, the thickness of the reflective layer 45 is 200 nm and 800 nm.

In some embodiments, the material of the reflective layer 45 is TiO₂Or SiO₂。

In some embodiments, the thickness of the reflective layer 45 is 150-500nm, and the reflective layer 45 is an optical thin film coating, such as a first optical thin film coating. In one embodiment, the material of the first optical thin film coating is TiO₂And SiO₂One kind of (1).

In some embodiments, the thickness of the reflective layer 45 is 200-800 nm. The reflective layer 45 is two layersThe optical film coating layer is, for example, a first optical film coating layer and a second optical film coating layer. Wherein the thickness of the first optical thin film coating is 150-500nm, and the material is TiO₂And SiO₂One kind of (1). The material of the second optical film coating is Nb₂O₅、Al₂O₃、TiO₂And SiO₂One or more of (a).

In some embodiments, the thickness of the reflective layer 45 is 200-800 nm. The reflective layer 45 includes an intermediate optical film coating and an outer optical film coating. The outer optical film coating layer may be two optical film coating layers such as a first optical film coating layer, and the middle optical film coating layer may be one optical film coating layer such as a second optical film coating layer, wherein the second optical film coating layer is located between the two first optical film coating layers. The thickness of each first optical film coating is 150-500nm, and the material is TiO₂And SiO₂One kind of (1). The second optical film coating is Nb₂O₅、Al₂O₃、TiO₂And SiO₂One or more of (a).

Of course, in some embodiments, the reflective layer 45 may be replaced by an optical film with reflective and anti-reflection effects, so in some embodiments, the optical film with reflective and anti-reflection effects may also be referred to as an anti-reflection film.

The primer layer 46 may be disposed on a side of the reflective layer 45 away from the texture layer 44, and may be formed on the reflective layer 45 by spraying, silk-screen printing, offset printing, and the like, specifically, may be semi-transparent or opaque according to actual requirements. The color of the primer layer 46 can be selected according to actual requirements, and is not limited herein.

In one embodiment, the primer layer 46 is disposed such that the color of the primer layer 46 is superimposed with the color and the effect of the color change with angle of the first liquid crystal layer 42, thereby enabling the color presented by the film 40 to be richer.

It should be noted that external light may be incident from the side of the texture layer 44. The reflective layer 45 may be an antireflection film as described above, so that at least a portion of incident light passes through the antireflection film and enters the primer layer 46, thereby making the color of the film 40 more transparent and vivid.

In one embodiment, primer layer 46 may include three ink layers disposed in a stack. The color of each ink layer may be different. In one embodiment, the thickness of each ink layer may be 6-8 μm. In one embodiment, the thickness of each ink layer may be one of 6 μm, 6.5 μm, 7 μm, 7.5 μm, and 8 μm.

In one embodiment, the three ink layers are all black ink layers.

In an embodiment, the three ink layers include two white ink layers sequentially stacked on the reflective layer and a gray ink layer disposed on a side of the two white ink layers away from the reflective layer. Wherein, the grey printing ink layer can play the effect of shading and drawing of patterns.

In other embodiments, the primer layer 46 can also be a plurality of black ink layers, or a plurality of mixed layers of black ink layers and white ink layer sets, or a plurality of mixed layers of gray ink layers and white ink layer sets, or a plurality of mixed layers of black ink layers and white ink layer sets and gray ink layers.

The ink layer formed in the application is thin, strong in adhesive force and low in brittleness, so that the stability of the membrane 40 can be improved.

It is understood that the reflective layer 45 and the primer layer 46 can be used as optical film layers, and certainly, the optical film layers are not limited to the reflective layer 45 and the primer layer 46 listed in the above embodiments, and may also include other stacked layers, which are not described in detail.

Next, a method for producing a membrane sheet, which can be used for producing the membrane sheet 40 in the above-described embodiment, will be described. Of course, the method can also be used for preparing other types of membranes, and details are not described.

Referring to fig. 12, fig. 12 is a flow chart illustrating a method for manufacturing a film according to an embodiment of the present disclosure. The method comprises the following steps:

step S1201: and coating photo-crosslinking polymer liquid crystal on the transfer film and performing photo-alignment to manufacture at least one liquid crystal layer with a preset liquid crystal pattern.

In some embodiments, the liquid crystal layer can be fabricated separately during the film fabrication process, and the already fabricated liquid crystal layer can be used directly during the film lamination process. The liquid crystal layer is manufactured independently, so that the production efficiency of the liquid crystal layer can be improved, the quality of the liquid crystal layer can also be improved, and the production efficiency and the quality of the diaphragm are improved indirectly in the diaphragm manufacturing process.

The liquid crystal layer is manufactured independently, so that the production efficiency and the quality of the liquid crystal layer are not influenced by the manufacturing process of the diaphragm. In the prior art, the manufacturing process of the liquid crystal layer needs to be performed after the preparation of other laminates in the film is completed, that is, the liquid crystal layer is manufactured on the manufactured other laminates, so that the production of the liquid crystal layer depends on the production process of the other laminates, and the production efficiency and the quality of the liquid crystal layer also seriously affect the production efficiency of the film and the quality of the film.

For the formulation composition, the coating thickness and the liquid crystal layer thickness of the photo-crosslinking polymer liquid crystal, reference may be made to the descriptions of the photo-crosslinking polymer liquid crystal, the first liquid crystal layer 42 and the second liquid crystal layer 43 in the above embodiments, which are not repeated herein.

In some embodiments, the transfer film may be made of the same material as the film substrate 41 in the embodiment shown in fig. 5, so that in the film manufacturing process, the transfer film and the liquid crystal layer are manufactured as a whole, the transfer film is directly used as the film substrate, the liquid crystal layer is used as the first liquid crystal layer 42 and is directly used in the film without separating the transfer film from the liquid crystal layer, and on the basis, another group of transfer film is separated from the liquid crystal layer, and the liquid crystal layer is used as the second liquid crystal layer 42 in the film, so that the material change of the transfer film can reduce the separation between the film substrate 41 and the liquid crystal layer, such as the first liquid crystal layer 42, and directly use the combination of the film substrate 41 and the liquid crystal layer, such as the first liquid crystal layer 42.

In an embodiment, referring to fig. 13, fig. 13 discloses a schematic flow chart of a liquid crystal layer manufacturing method according to an embodiment of the present application, where the liquid crystal layer manufacturing method includes:

step S1301: and coating a release agent on the transfer film.

The release agent is coated on the transfer film, so that the subsequent demolding of the liquid crystal layer is facilitated, the adhesion of the liquid crystal layer and the transfer film is avoided, and the damage of the liquid crystal layer in the demolding process is also avoided. In one embodiment, the release force of the release agent is 10-20g/in when the release agent coating on the transfer film is completed. In one embodiment, the release agent is a film type release agent whose main component is polyethylene.

For example, the formulation of the release agent may include, in mass percent: 4-6% of polyethylene, 0.1-1% of cross-linking agent, 0.5-1% of polymerization inhibitor and 92-95% of toluene. The preparation method of the release agent can comprise the following steps: adding polyethylene into toluene, stirring, adding a cross-linking agent and a polymerization inhibitor, and stirring to form a mold release agent. In some embodiments, the polyethylene may be added to the toluene and stirred for 25-30 minutes before the other components are added. In some embodiments, the adding time of the cross-linking agent and the polymerization inhibitor can be controlled to be 5-10 minutes before the release agent is used in the liquid crystal layer manufacturing process, and the release agent can be used immediately after the cross-linking agent and the polymerization inhibitor are added and stirred for 3-5 minutes.

Step S1302: coating photo-crosslinking polymer liquid crystal on the parting agent.

As for the photo-crosslinking polymer liquid crystal, reference can be made to the description of the liquid crystal layer in the above film, and details are not repeated.

Step S1303: and covering the photo-crosslinking polymer liquid crystal on the transfer film by using a photomask with a preset pattern.

In some embodiments, the mask material is a transparent material such as quartz glass, and can be specifically prepared by steps such as chrome plating, glue leveling, developing, etching and the like. The photomask comprises a photoresist area, a semi-transparent area and a full-transparent area which form a preset pattern, and the size and the shape of each area can be customized. The function of the photomask for selectively transmitting ultraviolet light is utilized, and due to the existence of the preset pattern of the photomask, the ultraviolet light energy passing through different areas of the photomask is different, so that the liquid crystal in the photo-crosslinking polymer liquid crystal is oriented, the preset pattern on the photomask is transferred to the liquid crystal layer, and the preset liquid crystal pattern which is formed by the oriented liquid crystal and is the same as the preset pattern is formed.

Step S1304: and carrying out exposure treatment.

In some embodiments, a mask with a predetermined pattern is disposed between the light source and the photo-crosslinking polymer liquid crystal on the transfer film, and the predetermined liquid crystal pattern in the liquid crystal layer is aligned to display a color after exposure.

In some embodiments, the photo-crosslinking polymer liquid crystal can be oriented into cholesteric liquid crystal under the curing action of light irradiation, so as to reflect and refract light to display color. In some embodiments, the exposure energy during the exposure process is 500-1000mj/cm²。

Step S1305: and demolding to form the liquid crystal layer.

In some embodiments, the transfer film may be released from the liquid crystal layer by the action of a release agent. In addition, when the film is manufactured by laminating the liquid crystal layer, the transfer film can be separated from the liquid crystal layer by the action of the release agent. Of course, the separation of the transfer film from the liquid crystal layer by releasing may be performed when the liquid crystal layer is used, or the transfer film may be separated from the liquid crystal layer in advance by a release agent, the separated liquid crystal layer may be stored, and the liquid crystal layer may be taken out for use when a film is formed by laminating the liquid crystal layer.

It can be understood that the transfer film may be made of the same material as the film substrate 41, and therefore, in the film manufacturing process, the glue used for manufacturing the attaching layers, such as the first attaching layer 401 and the second attaching layer 402, is used to replace the release agent, the transfer film and the liquid crystal layer are manufactured into a whole, the transfer film is directly used as the film substrate, the liquid crystal layer is used as the first liquid crystal layer 42, and the transfer film and the liquid crystal layer are directly used in the film without being separated from each other by demolding. On the basis, another group of transfer films made of release agents are separated from the liquid crystal layer, and the liquid crystal layer is used as the second liquid crystal layer 42 to be utilized in the film, so that the material change of the transfer films can reduce the separation of the film substrate 41 and the liquid crystal layer, such as the first liquid crystal layer 42, and the combination of the film substrate 41 and the liquid crystal layer, such as the first liquid crystal layer 42, can be directly used.

In addition, one side or two opposite sides of the transfer film can be used for preparing the liquid crystal layer, so that the preparation efficiency is improved, and materials are saved. When the transfer film is provided with the laminating layer, the laminating layer can be utilized to arrange two liquid crystal layers on two opposite sides of the transfer film, and the transfer film with the liquid crystal layer can be directly utilized to the lamination of the diaphragm, so that the production efficiency is further improved.

Step S1202: and laminating at least one liquid crystal layer and at least one optical film layer according to the preset number of layers and the preset laminating position.

For the membrane, a specific laminated structure is designed in advance, and the specific laminated structure has a preset number of layers and preset laminated positions. For example, refer to fig. 5, 6, 7, 8, 9, 10, and 11 for the predetermined number of layers and the predetermined stacking position of the liquid crystal layer and the optical film layer. Then, when the liquid crystal layers, such as the first liquid crystal layer and the second liquid crystal layer, are ready, the lamination of the films can be completed as per step S1202.

In an embodiment, please refer to fig. 14, where fig. 14 discloses a flowchart of step S1202 in an embodiment of the present application. Step S1202 may include:

step S1401: and laminating at least one liquid crystal layer and the film substrate to form a second laminated layer.

In some embodiments, a membrane substrate is also present in the membrane to enhance the performance of the membrane. Referring to fig. 5, 7, 8, 9, 10 and 11, details about the lamination position of the film substrate and the design of the film substrate are not repeated.

In one embodiment, the number of liquid crystal layers may be two, for example, the first liquid crystal layer 42 and the second liquid crystal layer 43 in any one of the embodiments shown in fig. 5, 6, 7, 8, 10, and 11. The first and second liquid crystal layers may be sequentially stacked on the same side of the film substrate to form a second stack. Specifically, glue can be respectively coated between the first liquid crystal layer and the film substrate and between the first liquid crystal layer and the second liquid crystal layer to form a bonding layer, and then the bonding layer is bonded and fixed. For example, in the embodiment shown in fig. 7, a first adhesion layer 401 is disposed between the film substrate 41 and the first liquid crystal layer 42 to adhere the film substrate 41 and the first liquid crystal layer 42 together. A second adhesive layer 402 is disposed between the first liquid crystal layer 42 and the second liquid crystal layer 43 to adhere the first liquid crystal layer 42 and the second liquid crystal layer 43 together. In one embodiment, one of the two phase-bonded substrates can be placed on a coating platform, a glue can be applied by a roller, the thickness of the glue can be 10-15 μm, and the other one is laminated on the adhesive layer formed by the glue. Of course, in some embodiments, the first and second liquid crystal layers may be stacked on opposite sides of the film substrate to form the second stack.

Step S1402: UV transfer of the texture layer is performed on the second laminate to form a first laminate.

The texture layer may be directly UV transferred to be disposed on the other laminate layers, and of course, the texture layer may also be disposed by lamination via the lamination layer. In one embodiment, the texture layer can also be pre-formed with reference to the liquid crystal layer, for example, by UV transfer on a transfer film and then de-molding to form the texture layer. In one embodiment, a release agent may be coated on the transfer film, UV transfer printing may be performed on the release agent, and the transfer film may be released to form the texture layer. In one embodiment, a UV transfer machine can be used to uniformly coat a layer of curing glue on the release agent of the transfer film, the curing glue component can mainly comprise urethane acrylate, the thickness of the curing glue can be 7-9 μm, the curing glue is cured after being irradiated by ultraviolet light, and the irradiation energy of the ultraviolet light is 1000-.

Step S1403: an optical film layer is disposed on the first stack.

For the optical film layer, a reflective layer and a primer layer may be included. A reflective layer may be provided on the first layer stack and then a primer layer may be provided on the side of the reflective layer remote from the first layer stack. For the stacked structure and the stacked position of the reflective layer, reference may be made to the structure, the thickness and the stacked position of the reflective layer 45 in the embodiments shown in fig. 5, fig. 7, fig. 8 and fig. 10, which are not described in detail. In one embodiment, the reflective layer may be coated by physical vapor deposition such as evaporation, continuous line sputtering, or furnace sputtering.

In one embodiment, it may be in the first placeForming a multilayer optical film coating on the laminate by physical vapor deposition, wherein the optical film coating is made of Nb₂O₅、Al₂O₃、TiO₂And SiO₂One or more of (a).

For the lamination structure and the lamination position of the primer layer, reference may be made to the structure and the thickness of the primer layer 46 in the embodiments shown in fig. 5, fig. 7, fig. 8 and fig. 10, which are not repeated. In an embodiment, the primer layer is an ink layer, and the ink layer can be silk-screened on the side of the reflective layer far away from the first lamination layer. Specifically, an ink layer can be printed on the reflecting layer in a screen printing mode, the membrane printed with the ink layer is placed into an oven to be baked, the baking temperature can be 75-95 ℃, the baking time can be 25-40min, and the primer layer can be formed after the ink is cured and baked. In one embodiment, the baking temperature may be 80 ℃, and in one embodiment, the baking time may be 30 min.

Referring to fig. 15, fig. 15 is a graph showing the reflectivity of the film for visible light of each wavelength according to an embodiment of the present disclosure. The film was produced by the film production method in the above example, and the reflectance of visible light of each wavelength was measured using the film. Therefore, in the visible light with the wavelength of 400-760nm, the reflectivity fluctuates along with the change of the wavelength, the reflectivity fluctuation in the red light color region of 600-700nm is large, the red light reflectivity can exceed 90% at most, and the metal texture is also strong.

The explosion-proof diaphragm that this application was made can make the arbitrary pattern effect of customization, can also let the regional colour of gradual change have the metallic texture and the angle discoloration effect of high reflection of light, and this is that other technologies can not do at present.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A diaphragm, comprising:

and the optical film layer is stacked with the liquid crystal layer.

2. The diaphragm of claim 1, further comprising:

the texture layer is provided with texture patterns, is arranged in a laminating mode with the optical film layer and the liquid crystal layer and is positioned on one side, facing the liquid crystal layer, of the optical film layer.

3. The diaphragm of claim 2 wherein said liquid crystal layer comprises:

the first liquid crystal layer and the second liquid crystal layer are arranged in a stacked mode, and each of the first liquid crystal layer and the second liquid crystal layer is arranged in a stacked mode with the optical film layer and the texture layer.

4. The diaphragm of claim 3 wherein said textured layer is on the same side of said first and second liquid crystal layers.

5. The diaphragm of claim 3, further comprising:

the diaphragm base material is used for transmitting light rays, the diaphragm base material is arranged with the first liquid crystal layer and the second liquid crystal layer in a stacking mode, and the diaphragm body is located between the first liquid crystal layer and the second liquid crystal layer or on the same side of the first liquid crystal layer and the second liquid crystal layer.

6. A membrane according to any one of claims 2 to 5, wherein the material of the texture layer is an ultraviolet light curable glue having a thickness of 7 to 9 μm.

7. A diaphragm according to any one of claims 2 to 5 wherein the optical film layer comprises:

a reflective layer laminated with the liquid crystal layer; and

and the primer layer is stacked with the reflecting layer and is positioned on one side of the reflecting layer, which is far away from the liquid crystal layer.

8. The film of claim 7, wherein the primer layer comprises:

the printing ink layer, the printing ink layer includes the black printing ink layer that the three-layer stacks gradually the setting, perhaps keeps away from white printing ink layer, white printing ink layer and the grey printing ink layer that the direction of reflector layer stacks gradually the setting.

9. The film as claimed in claim 7, wherein the reflective layer comprises a first optical thin film coating layer laminated with the liquid crystal layer, the first optical thin film coating layer has a thickness of 150-500nm and is made of TiO₂Or SiO₂。

10. The diaphragm of claim 9 wherein said reflective layer further comprises a second optical film coating disposed in a stack with said first optical film coating, said second optical film coating being Nb as a material₂O₅、Al₂O₃、TiO₂And SiO₂One or more of (a).

11. The film of claim 10 wherein the reflective layer comprises two first optical film layers and a second optical film layer, the second optical film layer being disposed between the two first optical film layers and being stacked with the two first optical film layers, respectively.

12. A patch according to any one of claims 2 to 5, wherein each said at least one liquid crystal layer comprises cholesteric liquid crystals having a thickness of from 2 to 3 μm.

13. The membrane according to any one of claims 2 to 5, wherein the maximum reflectance of the membrane for visible light with a wavelength of 400 and 760nm is greater than 90%.

14. A housing, comprising:

a base for transmitting light; and

the membrane of any one of claims 1-13, said membrane being affixed to one side of said substrate and being disposed in a stacked relationship with said substrate.

15. An electronic device, comprising:

the housing of claim 14; and

and the display module is arranged on the shell.

16. A method of making a membrane, comprising:

17. The method of claim 16, wherein the coating a photo-crosslinking polymer liquid crystal on the transfer film and performing photo-alignment to fabricate at least one liquid crystal layer having a predetermined liquid crystal pattern comprises:

coating a release agent on the transfer film;

coating photo-crosslinking polymer liquid crystal on the release agent;

covering the photo-crosslinking polymer liquid crystal on the transfer film by using a photomask with a preset pattern;

carrying out exposure treatment;

and demolding to form the liquid crystal layer.

18. The method of claim 16, wherein prior to said laminating said at least one liquid crystal layer, optical film layer, and said at least one liquid crystal layer in a predetermined number of layers and at a predetermined lamination position, said method further comprises:

carrying out UV transfer printing on the transfer film;

demolding to form a texture layer;

the laminating the at least one liquid crystal layer and the optical film layer according to the preset number of layers and the preset laminating position comprises the following steps:

laminating the at least one liquid crystal layer, the membrane body and the texture layer according to a preset number of layers and a preset laminating position to form a first lamination;

an optical film layer is disposed on the first stack.

19. The method of claim 18, further comprising:

coating photo-crosslinking polymer liquid crystal on one side or two opposite sides of the diaphragm substrate and performing photo-alignment to form a liquid crystal layer with a preset liquid crystal pattern;

the at least one liquid crystal layer, the membrane body and the texture layer are stacked according to the preset number of layers and the preset stacking position to form a first stack, and the method comprises the following steps:

and laminating the film substrate with the liquid crystal layer and the texture layer according to the preset number of layers and the preset lamination position to form the first lamination.

20. The method of claim 19, wherein coating photo-cross-linking polymer liquid crystal on one side or two opposite sides of the film substrate and performing photo-alignment to form a liquid crystal layer with a preset liquid crystal pattern comprises:

arranging a bonding layer formed by glue on one side of the membrane substrate;

coating photo-crosslinking polymer liquid crystal on the laminating layer;

covering the photo-crosslinking polymer liquid crystal on the membrane substrate by using a photomask with a preset pattern;

and carrying out exposure treatment.

21. The method of claim 16, wherein the laminating the at least one liquid crystal layer and the optical film layer according to the predetermined number of layers and the predetermined lamination position comprises:

laminating the at least one liquid crystal layer and the film substrate to form a second laminated layer;

carrying out UV transfer printing of the texture layer on the second lamination layer to form a first lamination layer;

an optical film layer is disposed on the first stack.

22. The method of claim 16, wherein the at least one liquid crystal layer comprises first and second liquid crystal layers;

sequentially laminating the first liquid crystal layer and the second liquid crystal layer on the same side of the diaphragm substrate to form a second laminated layer;

carrying out UV transfer printing of the texture layer on the second liquid crystal layer to form a first laminated layer;

an optical film layer is disposed on the first stack.

23. The method of claim 18 or 21 or 22, wherein the optical film layer comprises a reflective layer and a primer layer, and wherein disposing an optical film layer on the first stack comprises:

disposing a reflective layer on the first stack;

a primer layer is provided on the side of the reflective layer remote from the first stack.

24. The method of claim 23, wherein disposing a reflective layer on the first stack comprises:

forming a multilayer optical film coating film on the first lamination layer by utilizing physical vapor deposition coating, wherein the material of the optical film coating film is Nb₂O₅、Al₂O₃、TiO₂And SiO₂One or more of (a).

25. The method of claim 23, wherein the primer layer is an ink layer, and wherein disposing a primer layer on a side of the reflective layer remote from the first laminate comprises:

and printing an ink layer on one side of the reflecting layer far away from the first laminated layer by screen printing.