WO2023016154A1 - Film and preparation method therefor, housing, and electronic device - Google Patents

Abstract

Disclosed are a film (40) and a preparation method therefor, a housing (20), and an electronic device (100), belonging to the technical field of films. In the film (40), liquid crystal layers (42, 43) are provided with a predetermined liquid crystal pattern composed of aligned liquid crystal, the predetermined liquid crystal pattern being configured to be formed by means of photo-controlled alignment of a photo-crosslinked polymer liquid crystal liquid under a mask provided with a predetermined pattern. An optical film layer and the liquid crystal layers (42, 43) are overlappingly disposed. The present application can cause the preparation of the liquid crystal layers (42, 43) to not be limited by steps of the preparation method for the film (40). Furthermore, the aligned liquid crystal is capable of reflecting incoming light, thereby improving brightness of the film (40). The wavelength of reflected light changes with the incident angle of incident light. Furthermore, the liquid crystal pattern is predetermined so that the housing (20) having the film (40) can display a color, thereby enriching the display effects of the housing (20).

Description

Diaphragm and its preparation method, housing and electronic equipment 【Technical field】

The present application belongs to the technical field of diaphragms, and in particular relates to a diaphragm, a preparation method thereof, a housing and electronic equipment.

【Background technique】

At present, due to the needs of various aspects, most of the tools and equipment used by people in daily production and life are equipped with diaphragms.

In the prior art, most of the diaphragms that change the appearance color and pattern are simply coated with a texture layer on the diaphragm substrate. With the continuous development of the industry, only the texture layer is applied to the diaphragm substrate. Diaphragms display single effects such as color and pattern, which can no longer meet the growing needs of users.

【Content of invention】

The application provides a diaphragm, comprising:

The liquid crystal layer is provided with a preset liquid crystal pattern composed of oriented liquid crystals, and the preset liquid crystal pattern is configured to be photo-controlled by a photo-crosslinked polymer liquid crystal under a photomask provided with a preset pattern. formed; and

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

In order to solve the above technical problems, another technical solution adopted by this application is: a casing, comprising:

a substrate for transmitting light; and

A diaphragm, the diaphragm is fixed on one side of the base body and stacked with the base body, the diaphragm includes:

The liquid crystal layer is provided with a preset liquid crystal pattern composed of oriented liquid crystals, and the preset liquid crystal pattern is configured to be photo-controlled by a photo-crosslinked polymer liquid crystal under a photomask provided with a preset pattern. formed; and

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

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

housing, including:

a substrate for transmitting light; and

A diaphragm, the diaphragm is fixed on one side of the base body and stacked with the base body, the diaphragm includes:

The liquid crystal layer is provided with a preset liquid crystal pattern composed of oriented liquid crystals, and the preset liquid crystal pattern is configured to be photo-controlled by a photo-crosslinked polymer liquid crystal under a photomask provided with a preset pattern. formed; and

an optical film layer stacked with the liquid crystal layer; and

The display module is arranged on the casing.

In order to solve the problems of the technologies described above, another technical solution adopted by the application is: a method for preparing a diaphragm, comprising:

Coating photo-crosslinkable polymer liquid crystal liquid on the transfer film and carrying out photo-controlled alignment to produce at least one liquid crystal layer with a preset liquid crystal pattern;

The at least one liquid crystal layer and the optical film layer are stacked according to a preset number of layers and a preset stacking position.

In the above scheme, the liquid crystal layer is formed by light-crosslinked polymer liquid crystal liquid through photo-controlled orientation, which can make the preparation of the liquid crystal layer not restricted by the steps of the membrane preparation method, and can prepare a large number of liquid crystals with preset liquid crystal patterns at the same time or in advance. The liquid crystal layer can be directly used in the preparation process of the film; in addition, the oriented liquid crystal can reflect the incoming light, thereby improving the brightness of the film, and because the wavelength of the reflected light changes with the incident angle of the incident light Furthermore, the preset liquid crystal pattern enables the housing with the diaphragm to display colors, thereby enriching the presentation effect of the housing.

【Description of drawings】

Figure 1 discloses a front view of an electronic device in an embodiment of the present application;

Figure 2 discloses a rear view of the electronic device in an embodiment of the present application;

Figure 3 discloses a schematic structural view of the housing in the embodiment shown in Figure 2 of the present application;

Fig. 4 discloses the sectional view of line III-III of the housing in the embodiment shown in Fig. 3 of the present application;

Figure 5 discloses a schematic structural view of the diaphragm in the embodiment shown in Figure 3 of the present application;

Figure 6 discloses a schematic structural view of another embodiment of the diaphragm in the embodiment shown in Figure 5 of the present application;

Figure 7 discloses a schematic structural view of another embodiment of the diaphragm in the embodiment shown in Figure 5 of the present application;

Figure 8 discloses a schematic structural view of another embodiment of the diaphragm in the embodiment shown in Figure 5 of the present application;

Figure 9 discloses a schematic structural view of another embodiment of the diaphragm in the embodiment shown in Figure 5 of the present application;

FIG. 10 discloses a schematic structural view of another embodiment of the diaphragm in the embodiment shown in FIG. 8 of the present application;

Figure 11 discloses a schematic structural view of another embodiment of the diaphragm in the embodiment shown in Figure 5 of the present application;

Figure 12 discloses a flow chart of a method for preparing a membrane in an embodiment of the present application;

Figure 13 discloses a schematic diagram of the preparation process of the liquid crystal layer in an embodiment of the present application;

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

FIG. 15 discloses a graph of the reflectance of the film to visible light of various wavelengths in an embodiment of the present application.

【Detailed ways】

The application will be described in further detail below in conjunction with the accompanying drawings and embodiments. In particular, the following examples are only used to illustrate the present application, but not to limit the scope of the present application. Likewise, the following embodiments are only some of the embodiments of the present application but not all of them, and all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection 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 present application. The occurrences of this 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 understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

The application sets forth a diaphragm comprising:

The liquid crystal layer is provided with a preset liquid crystal pattern composed of oriented liquid crystals, and the preset liquid crystal pattern is configured to be photo-controlled by a photo-crosslinked polymer liquid crystal under a photomask provided with a preset pattern. formed; and

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

In some embodiments, also include:

The texture layer has a texture pattern, is stacked with the optical film layer and the liquid crystal layer, and is located on a side of the optical film layer facing the liquid crystal layer.

In some embodiments, the liquid crystal layer includes:

The first and second liquid crystal layers are stacked, and each of the first and second liquid crystal layers is stacked with the optical film layer and the texture layer.

In some embodiments, the texture layer is located on the same side of the first and second liquid crystal layers.

In some embodiments, also include:

The diaphragm substrate is used to transmit light, the diaphragm substrate is stacked with the first and second liquid crystal layers, the diaphragm body is located between the first and second liquid crystal layers or the first liquid crystal layer One and the same side of the second liquid crystal layer.

In some embodiments, the material of the texture layer is UV-curable glue with a thickness of 7-9 μm.

In some embodiments, the optical film layer includes:

a reflective layer stacked with the liquid crystal layer; and

The primer layer is stacked with the reflective layer and is located on the side of the reflective layer away from the liquid crystal layer.

In some embodiments, the primer layer includes:

An ink layer, the ink layer includes three layers of black ink layers stacked in sequence, or a white ink layer, a white ink layer and a gray ink layer stacked in sequence in a direction away from the reflective layer.

In some embodiments, the reflective layer includes a first optical thin film coating layered with the liquid crystal layer, the thickness of the first optical thin film coating layer is 150-500 nm, and the material is TiO ₂ or SiO ₂ .

In some embodiments, the reflective layer further includes a second optical thin film coating laminated with the first optical thin film coating, and the material of the second optical thin film coating is Nb ₂ O ₅ , Al ₂ O ₃ , TiO ₂ and one or more of SiO ₂ .

In some embodiments, the reflective layer includes two first optical thin film coatings and one second optical thin film coating, the second optical thin film coating is located between the two first optical thin film coatings, and is respectively Two layers of the first optical thin film coating are stacked.

In some embodiments, each of the at least one liquid crystal layer comprises cholesteric liquid crystals and has a thickness of 2-3 μm.

In some embodiments, the highest reflectance of the film reflecting visible light with a wavelength of 400-760 nm is greater than 90%.

Next, a casing is described, which includes:

a substrate for transmitting light; and

As for the membrane described in the above embodiment, the membrane is fixed on one side of the base and stacked with the base.

Next, an electronic device is described, which includes:

the housing described in the above embodiments; and

The display module is arranged on the casing.

Next, a method for preparing a diaphragm is set forth, including:

Coating photo-crosslinkable polymer liquid crystal liquid on the transfer film and carrying out photo-controlled alignment to produce at least one liquid crystal layer with a preset liquid crystal pattern;

The at least one liquid crystal layer and the optical film layer are stacked according to a preset number of layers and a preset stacking position.

In some embodiments, the coating of the photo-crosslinked polymer liquid crystal liquid on the transfer film and performing photo-alignment to produce at least one liquid crystal layer with a preset liquid crystal pattern includes:

Coating a release agent on the transfer film;

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

Covering the photo-crosslinked polymer liquid crystal on the transfer film with a photomask having a preset pattern;

perform exposure processing;

Release the mold to form a liquid crystal layer.

In some embodiments, before the at least one liquid crystal layer and the optical film layer are stacked according to the preset number of layers and the preset stacking position, the method further includes:

UV transfer printing on the transfer film;

Release the mold to form a texture layer;

The lamination of the at least one liquid crystal layer and optical film layer according to the preset number of layers and the preset stacking position includes:

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

An optical film layer is disposed on the first stack.

In some embodiments, the method also includes:

Coating a photo-crosslinkable polymer liquid crystal liquid on one side or opposite sides of the film base material and performing photo-alignment to form a liquid crystal layer with a preset liquid crystal pattern;

The lamination of the at least one liquid crystal layer, the diaphragm body, and the texture layer according to the preset number of layers and preset lamination positions to form a first lamination includes:

The first laminate is formed by laminating the film base material with the liquid crystal layer and the texture layer according to a predetermined number of layers and a predetermined lamination position.

In some embodiments, the coating of photo-crosslinkable polymer liquid crystal liquid on one side or opposite sides of the film base material and performing photo-controlled alignment to form a liquid crystal layer with a preset liquid crystal pattern includes:

A bonding layer formed by glue is arranged on one side of the film substrate;

Coating photo-crosslinked polymer liquid crystal liquid on the bonding layer;

Covering the photo-crosslinked polymer liquid crystal on the film substrate with a photomask having a preset pattern;

Perform exposure processing.

In some embodiments, the stacking of the at least one liquid crystal layer and the optical film layer according to the preset number of layers and the preset stacking position includes:

Laminating the at least one liquid crystal layer and the film substrate to form a second lamination;

Carrying out UV transfer printing of the texture layer on the second laminate to form a first laminate;

An optical film layer is disposed on the first stack.

In some embodiments, the at least one liquid crystal layer includes first and second liquid crystal layers;

The lamination of the at least one liquid crystal layer and optical film layer according to the preset number of layers and the preset stacking position includes:

Laminating the first and second liquid crystal layers sequentially on the same side of the film substrate to form a second lamination;

performing UV transfer printing of the texture layer on the second liquid crystal layer to form a first stack;

An optical film layer is disposed on the first stack.

In some embodiments, the optical film layer includes a reflective layer and a primer layer, and the optical film layer disposed on the first stack includes:

disposing a reflective layer on the first stack;

A primer layer is provided on the side of the reflective layer away from the first lamination layer.

In some embodiments, the disposing a reflective layer on the first stack includes:

A multilayer optical thin film coating is formed on the first stack layer by physical vapor deposition coating, and the material of the optical thin film coating is one or more of Nb ₂ O ₅ , Al2O ₃ , TiO ₂ and SiO ₂ .

In some embodiments, the primer layer is an ink layer, and the primer layer is provided on the side of the reflective layer away from the first lamination layer, comprising:

A layer of ink is screen printed on the side of the reflective layer away from the first stack.

The present application describes an electronic device which has a housing. The shell can present any pattern gradient color effect and the color can show different effects at different angles. In addition, the color also has a highly reflective metal texture.

As used herein, an "electronic device" (which may also be referred to as a "terminal" or "mobile terminal" or "electronic device") includes, but is not limited to, configured to ), digital subscriber line (DSL), digital cable, direct cable connection, and/or another data connection/network) and/or via (for example, for cellular networks, wireless local area networks (WLAN), digital A TV network, a satellite network, an AM-FM broadcast transmitter, and/or a device for receiving/transmitting communication signals via a wireless interface of 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; Personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data communication capabilities; may include radiotelephones, pagers, Internet/Intranet access , a PDA with a web browser, organizer, calendar, and/or Global Positioning System (GPS) receiver; and a conventional laptop and/or palm-type receiver or other electronic device including a radiotelephone transceiver. A mobile phone is an electronic device equipped with a cellular communication module.

Please refer to FIG. 1 , which discloses a front view of an electronic device in an embodiment of the present application. 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 equipment, calculators, programmable remote controls, 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 equipment, and digital cameras and combinations thereof.

Please refer to FIG. 1 and FIG. 2 . FIG. 2 discloses a rear view of an electronic device 100 in 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. Wherein, the accommodation space in the housing assembly 200 can be used to carry electronic components such as a circuit board, a battery, various types of sensors, a front camera 400 and a rear camera 500 . The display module 300 can be used to display messages, image information and the like. The front camera 400 can be located under the display module 300 , and light is incident on the front camera 400 through the display module 300 to realize the function of 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 to realize the function of taking pictures. 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 casing assembly 200 may include a middle frame 10 for carrying the display module 300 on one side and a casing 20 mounted on the other side of the middle frame 10 . Wherein, the middle frame 10 and the casing 20 are surrounded to form an accommodating space. The display module 300 is disposed opposite to the casing 20 . Please refer to FIG. 2 and FIG. 3 together. FIG. 3 discloses a schematic structural diagram of the housing 20 in the embodiment shown in FIG. 2 of the present application. A through hole 201 is defined on the casing 20 to install the rear camera 500 at the through hole 201 . In one embodiment, the middle frame 10 and the housing 20 may be integrated, so that the middle frame 10 and the housing 20 form an integrated structure, and may be collectively referred to as a "housing". In an embodiment, the middle frame 10 may be omitted, and the display module 300 is formed on the casing 20 .

Please refer to FIG. 4 , which discloses a cross-sectional view of the casing 20 along line III-III in the embodiment shown in FIG. 3 of the present application. The casing 20 may include a base body 30 and a diaphragm 40 disposed on a side of the base body 30 facing the accommodation space. Wherein the substrate 30 and the diaphragm 40 are stacked. When the light passes through the substrate 30 and irradiates on the diaphragm 40 , the housing 20 can show a gradient color effect of any pattern and the color can change at different angles to present different effects. In addition, the color also has a highly reflective metallic texture.

The material of the base body 30 may be glass or plastic that can transmit light, or a composite material of glass, plastic and metal, ceramics, or the like. In one embodiment, the material of the matrix 30 can be a composite sheet of polycarbonate (polycarbonate, PC) and polymethyl methacrylate (Polymethyl Methacrylate, PMMA), specifically, it can be made of PC and PMMA particles by co-extrusion Composite panels. In one embodiment, the base body 30 may be transparent in whole or in part. In one embodiment, at least the surface of the substrate 30 on the side away from the diaphragm 40 may be a frosted surface. In one embodiment, at least the surface of the substrate 30 away from the diaphragm 40 may be a matte surface, and the haze of the matte surface is 65-85%. In one embodiment, the substrate 30 may be translucent. Of course, the transparency of the substrate 30 can be adjusted according to actual needs.

Understandably, the material of the base body 30 may also be other materials, which will not be repeated here.

In one embodiment, the substrate 30 may include an electrochromic device. For example, electrochromic devices can be made using electrochromic materials. The electrochromic material can be one of inorganic electrochromic materials and organic electrochromic materials. The inorganic electrochromic material can be tungsten trioxide. The organic electrochromic material can be one of polythiophenes and their derivatives, viologens, tetrathiafulvalenes, metal phthalocyanines and the like. Certainly, the electrochromic material can be produced by adopting existing technical solutions in the prior art within the scope understood by those skilled in the art, so no further description is given here.

In one embodiment, the substrate 30 may include a photochromic device. For example, photochromic devices can be made of photochromic materials, so that the photochromic devices can undergo color changes after being excited by light of a certain wavelength. The photochromic material can be produced by adopting existing technical solutions in the prior art within the scope understood by those skilled in the art, and details are not repeated here.

The diaphragm 40 is stacked with the base body 30 . In one embodiment, the membrane 40 can be glued on the base 30 . In one embodiment, the film 40 can be bonded by glue (such as OCA (Optically Clear Adhesive) optical glue), UV glue (shadowless glue, photosensitive glue, ultraviolet curing glue, Ultraviolet glue)) on the substrate 30 .

Please refer to FIG. 4 and FIG. 5 . FIG. 5 discloses a schematic structural diagram of the diaphragm 40 in the embodiment shown in FIG. 4 of the present application. The diaphragm 40 may include a diaphragm substrate 41 laminated with the substrate 30 and a first liquid crystal layer 42, a second liquid crystal layer 43, a texture layer 44, a reflective layer 45 and Primer layer 46. Wherein, 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 should be pointed out that the terms "first", "second"... and so on here and below are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implicitly indicating the indicated technical features quantity. Thus, a feature defined as "first", "second"... etc. may expressly or implicitly include one or more of said features.

It can be understood that names such as "first liquid crystal layer", "second liquid crystal layer" and "liquid crystal layer" can be interchanged in some embodiments. For example, in one embodiment, the "first liquid crystal layer" in other embodiments is called "second liquid crystal layer", and correspondingly, the "second liquid crystal layer" in other embodiments is called "first liquid crystal layer". ".

The diaphragm substrate 41 can be a film made of a polymer material with certain flexibility. The specific material can be polyethylene terephthalate (PET), and in some application scenarios, it can also be polychloride. Ethylene (Polyvinyl chloride, PVC), thermoplastic polyurethane elastomer rubber (Thermo plastic polyurethanes, TPU), etc., in some scenarios, the diaphragm substrate 41 can also be PC-PMMA composite board, transparent plastic, transparent leather and glass, etc. The material is not specifically limited here.

In some embodiments, the diaphragm substrate 41 may be made of the same material as the base body 30 . Either one of the diaphragm substrate 41 and the base body 30 can be omitted. Please refer to FIG. 6 . FIG. 6 discloses a structural diagram of another embodiment of the membrane 40 in the embodiment shown in FIG. 5 of the present application. The diaphragm base material 41 is omitted in the diaphragm 40 .

In one embodiment, the diaphragm substrate 41 can have the function of preventing the casing from bursting and fixing the casing debris, so the diaphragm 40 can also be called an explosion-proof membrane, and the diaphragm substrate 41 can be called an explosion-proof membrane. Membrane body. Certainly, in some embodiments, the diaphragm substrate 41 may also be called an explosion-proof film.

In one embodiment, the thickness of the membrane substrate 41 is 30-70 μm. In one embodiment, the thickness of the diaphragm substrate 41 is 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 regulated by controlling the thickness of the diaphragm base material 41 , so that the diaphragm 41 becomes lighter and thinner. In addition, the diaphragm base material 41 also has better elastic deformation properties.

In one embodiment, the diaphragm substrate 41 has a length of 420mm and a width of 300mm, which enables large-scale diaphragms 40 to be produced in batches during production. When in use, the diaphragms 40 are cut into pre-set Set the specification for use.

The first liquid crystal layer 42 can 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 base 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 of the present application. The first liquid crystal layer 42 can be bonded to one side of the film substrate 41 . For example, the membrane 40 is adhered to the membrane substrate 41 through the first bonding layer 401 . In one embodiment, the first bonding layer 401 can be transparent optical glue or UV glue. In one embodiment, the UV glue may include modified acrylic resin. In one embodiment, the thickness of the first bonding layer 401 is 10-15 μm. Without affecting the bonding strength of the first bonding layer 401 , the thickness of the first bonding layer 401 is reduced to reduce the influence of the first bonding layer 401 on the light transmission effect of the membrane 40 . In one embodiment, the thickness of the first bonding 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 include 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 crystal.

It should be pointed out 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 diaphragm 40 as a whole; After reflection, the reflected light can 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 when the viewing angle of the user is different, the observed color of the first liquid crystal layer 42 is different. The color will be red-shifted or blue-shifted as the viewing angle changes, so that the diaphragm 40 as a whole has a colorful effect.

In one embodiment, the first liquid crystal layer 42 is formed by aligning photo-crosslinkable polymer liquid crystals using photo-alignment technology. In one embodiment, the photo-crosslinkable polymer liquid crystal liquid may include a photocrosslinkable alignment agent, a polymerizable monomer, a nematic liquid crystal, a chiral compound, and a photoinitiator. In one embodiment, the photocrosslinkable alignment agent may include photocrosslinkable materials such as laurates, coumarins, styrylpyridines, styrylbenzopyrrolidones, and diphenylacetylenes. one or more of. In one embodiment, the photo-crosslinking alignment agent may be a cinnamate-based substance. In one embodiment, the polymerizable monomer may be one or more of acrylate, isobornyl acrylate, tetrahydrofuran acrylate, and the like. In one embodiment, the photoinitiator can be a thioxanthone photoinitiator, (2,4,6-trimethylbenzoyl) diphenylphosphine oxide, 1-hydroxycyclohexylbenzophenone, 2-methylbenzoyl One or more of 1-[4-(methylthio)phenyl]-2-(4-morpholinyl)-1-propanone, etc.

In some embodiments, the photo-crosslinked polymer liquid crystal liquid may further include an ultraviolet absorber and the like.

In one embodiment, the wavelength of the reflected light reflected by the liquid crystals in the first liquid crystal layer 42 satisfies the following formula: λ=2npsinθ, where λ is the wavelength of the reflected light, n is the average refractive index of the liquid crystals after orientation, and p is the The helical pitch of the aligned liquid crystal, θ is the angle between the incident light and the surface of the liquid crystal layer, that is, the complementary angle of the incident angle of the incident light. Wherein, the oriented liquid crystals can be arranged according to the corresponding pitch p, and the arrangement direction of the pitch p is determined by the photocuring energy.

In one embodiment, a photomask with a predetermined pattern can be used to cover the photo-crosslinked polymer liquid crystal liquid for photo-controlled alignment. The material of the photomask is quartz glass, which can be made through steps such as chrome plating, coating, development, and etching. The photomask includes a photoresist area forming a preset pattern, a semi-transparent area, and a fully transparent area. The size of each area is and shape can be customized. Utilizing the selective transmission function of the photomask to ultraviolet light, due to the existence of the preset pattern of the photomask, the energy of ultraviolet light passing through different regions of the photomask is different, thereby affecting the liquid crystal in the photocrosslinked polymer liquid crystal liquid. Orientation, so that the preset pattern on the photomask is transferred to the first liquid crystal layer 42, so that the first preset liquid crystal pattern made of aligned liquid crystals is the same as the preset pattern.

As the viewing angle of the user changes, the incident angle of the incident light reflected by the first liquid crystal layer 42 and entering the user's eyes changes, and θ changes, causing the wavelength λ of the reflected light reflected by the first liquid crystal layer 42 to change accordingly, thereby Change the color of reflected light. Therefore, when the viewing angle of the user is different, the observed color of the liquid crystal will change with the role, thereby producing a colorful effect. That is, the first liquid crystal layer 42 can not only customize the pattern arbitrarily, but also have different effects when the angle changes. In addition, the color also has a highly reflective metallic texture, thereby producing a colorful effect.

In one embodiment, the thickness of the first liquid crystal layer 42 is 2-3 μm, so as to enhance the colorful effect of the reflected light and make the display effect of the texture layer 44 better. 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 an embodiment, please refer to FIG. 8 , which discloses a schematic structural view of another embodiment of the diaphragm 40 in the embodiment shown in FIG. 5 of the present application. The first liquid crystal layer 42 can be disposed between the base body 30 and the diaphragm substrate 41 . Wherein the matrix 30 , the first liquid crystal layer 42 and the diaphragm base material 41 are stacked in sequence. In one embodiment, the first liquid crystal layer 42 can be bonded to the base body 30 and the film substrate 41 respectively. For example, they can be bonded together by glue (such as transparent optical glue, UV glue, etc.).

The structure, thickness and manufacturing method of the second liquid crystal layer 43 may be substantially the same as those of the first liquid crystal layer 42 . For details, please refer to the description of the above first liquid crystal layer 42 . The second preset 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 preset liquid crystal pattern. Of course, the second liquid crystal layer 43 may also be different from the first liquid crystal layer 42 in the manufacturing method, structure, polymer liquid crystal liquid, and thickness, which will not be repeated here. Here, only the positional relationship and connection relationship between the second liquid crystal layer 43 and other stacked structures in the diaphragm 40 are introduced.

Understandably, names such as "first preset liquid crystal pattern", "second preset liquid crystal pattern" and "preset liquid crystal pattern" can be interchanged in some embodiments. For example, in one embodiment, the "first preset liquid crystal pattern" in other embodiments is called "second preset liquid crystal pattern", and accordingly, the "second preset liquid crystal pattern" in other embodiments is called It is "the first preset liquid crystal pattern".

Please refer 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, please refer to FIG. 7 , the second liquid crystal layer 43 can be bonded on the side of the first liquid crystal layer 42 away from the film substrate 41 . For example, the second liquid crystal layer 43 is adhered to the first liquid crystal layer 42 through the second bonding layer 402 . In one embodiment, the second bonding layer 402 can be transparent optical glue or UV glue. In one embodiment, the UV glue can be modified acrylic resin. In one embodiment, the thickness of the second bonding layer 402 is 10-15 μm. Without affecting the bonding strength of the second bonding layer 402 , the thickness of the second bonding layer 402 is reduced to reduce the influence of the first bonding layer 401 on the light transmission effect of the membrane 40 . In one embodiment, the thickness of the second bonding layer 402 is one of 10 μm, 11 μm, 12 μm, 13 μm, 14 μm and 15 μm.

See Figure 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 can be bonded to one side of the film substrate 41 . For example, the second liquid crystal layer 43 is adhered to the film substrate 41 through the second bonding layer 402 .

It can be understood that the number of liquid crystal layers such as the first liquid crystal layer 42 and the second liquid crystal layer 43 may be at least one, and may not be limited to the first liquid crystal layer 42 and the second liquid crystal layer 43 . As for the arrangement position and arrangement method of the liquid crystal layer, please refer to the first liquid crystal layer 42 and the second liquid crystal layer 43 . Of course, the number of liquid crystal layers such as the first liquid crystal layer 42 and the second liquid crystal layer 43 may also be multiple. Please refer to FIG. 9 . FIG. 9 discloses a structural diagram of another embodiment of the membrane 40 in the embodiment shown in FIG. 5 of the present application. The second liquid crystal layer 43 is omitted from the diaphragm 40 .

Please refer to FIG. 5 again, the texture layer 44 may have a texture pattern, so that the diaphragm 40 can further present a texture effect. The texture layer 44 may be disposed on a side of the second liquid crystal layer 43 away from the first liquid crystal layer 42 .

The material of the texture layer 44 can be UV glue, and the texture layer 44 can be formed by UV transfer printing or the like. Specifically, according to specific application scenarios, UV texture transfer can be performed on the first liquid crystal layer 42 or on the transfer film, so as to form the texture layer 44 . In some scenarios, the texture layer 44 on the transfer film can be removed, and the texture layer 44 can be bonded to the second liquid crystal layer 43 through a third bonding layer such as transparent optical glue or UV glue.

It can be understood that the terms "first adhesive layer", "second adhesive layer", "third adhesive layer" and "adherent layer" can be interchanged in some embodiments. For example, in one embodiment, the "first bonding layer" in other embodiments is called "second bonding layer", and accordingly, the "second bonding layer" in other embodiments is called "second bonding layer". A bonding layer".

It should be noted that, in order to ensure the texture effect and adhesion presented by the texture layer 44, in this embodiment, the thickness of the texture layer 44 can be 7-9 μm, specifically 7 μm, 7.5 μm, 8 μm, 8.5 μm, 9 μm wait.

In one embodiment, please refer to FIG. 10 . FIG. 10 discloses a schematic structural view of another embodiment of the diaphragm 40 in the embodiment shown in FIG. 8 of the present application. The texture layer 44 can be disposed together with the first liquid crystal layer 42 between the base body 30 and the film substrate 41 . The texture layer 44 can be disposed between the base body 30 and the first liquid crystal layer 42 .

It is understood that in some embodiments, the texture layer 44 may be omitted. Please refer to FIG. 11 . FIG. 11 discloses a structural diagram of another embodiment of the membrane 40 in the embodiment shown in FIG. 5 of the present application. The texture layer 44 is omitted from the diaphragm 40 .

Please refer to FIG. 5 again, the reflective layer 45 can be stacked on the side of the texture layer 44 away from the film substrate 41, and is used to reflect the incident light, so that the reflected light can pass through the first liquid crystal layer 42 and the second liquid crystal layer. The second liquid crystal layer 43 makes the preset liquid crystal pattern present a brighter colorful effect.

The reflective layer 45 may be one layer of optical thin film coating or a plurality of optical thin film coatings sequentially stacked on the texture layer 44 and fixedly connected to each other. The reflective layer 45 can be formed by any method of evaporation, continuous line sputtering or furnace sputtering. The material of the reflective layer 45 may be one or more of Nb ₂ O ₅ , Al ₂ O ₃ , TiO ₂ and SiO ₂ .

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

In one embodiment, the reflective layer 45 has a thickness of 150-500 nm.

In one embodiment, the reflective layer 45 has a thickness of 200-800 nm.

In some embodiments, the reflective layer 45 is made of TiO ₂ or SiO ₂ .

In some embodiments, the reflective layer 45 has a thickness of 150-500 nm, and the reflective layer 45 is an optical thin film coating such as the first optical thin film coating. In one embodiment, the material of the first optical thin film coating is one of TiO ₂ and SiO ₂ .

In some embodiments, the reflective layer 45 has a thickness of 200-800 nm. The reflective layer 45 is two layers of optical thin film coatings such as a first optical thin film coating and a second optical thin film coating. Wherein, the thickness of the first optical thin film coating is 150-500nm, and the material is one of TiO ₂ and SiO ₂ . The material of the second optical thin film coating is one or more of Nb ₂ O ₅ , Al ₂ O ₃ , TiO ₂ and SiO ₂ .

In some embodiments, the reflective layer 45 has a thickness of 200-800 nm. The reflective layer 45 includes a middle optical thin film coating and an outer optical thin film coating. Wherein, the outer optical thin film coating is two layers of optical thin film coating such as the first optical thin film coating, and the middle layer of optical thin film coating can be one layer of optical thin film coating such as the second optical thin film coating, wherein the second optical thin film coating is located between the two layers of the first between optical thin film coatings. The thickness of each layer of the first optical thin film coating is 150-500nm, and the material is one of TiO ₂ and SiO ₂ . The second optical thin film coating is one or more of Nb ₂ O ₅ , Al ₂ O ₃ , TiO ₂ and SiO ₂ .

Certainly, in some embodiments, the above-mentioned reflective layer 45 can be replaced by an optical film with reflection and anti-reflection film effects, so, in some embodiments, the optical film with reflection and anti-reflection film effects can also be called AR coating.

The primer layer 46 can be arranged on the side of the reflective layer 45 away from the texture layer 44. Specifically, it can be formed on the reflective layer 45 by using color ink, pigment, dye, etc. by spraying, silk screen printing, printing, offset printing, etc. The requirement is set to semi-transparent or opaque. Wherein, the color presented by the primer layer 46 can be selected according to actual needs, and is not limited here.

In one embodiment, the primer layer 46 is set so that the color of the primer layer 46 is superimposed on the color of the first liquid crystal layer 42 and the effect of changing color with angle, so that the color presented by the diaphragm 40 can be more abundant. .

It should be pointed out that external light can enter from one side of the texture layer 44 . The reflective layer 45 can be the above-mentioned anti-reflection film, so that at least part of the incident light passes through the anti-reflection film and enters the primer layer 46, so that the color of the diaphragm 40 is more transparent and bright.

In one embodiment, the primer layer 46 may include three ink layers stacked together. The color of each ink layer can 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 one embodiment, the three ink layers include two white ink layers sequentially stacked on the reflective layer and one gray ink layer disposed on the side of the two white ink layers away from the reflective layer. Among them, the gray ink layer can play the role of shading and demoulding.

In other embodiments, the primer layer 46 can also be a multi-layer black ink layer, or a multi-layer mixed layer of a black ink layer and a white ink layer, or a multi-layer mixed layer of a gray ink layer and a white ink layer , or a multi-layer mixed layer of black ink layer and white ink layer group layer, gray ink layer.

The ink layer formed in the present application is thin, has strong adhesion and low brittleness, thereby improving the stability of the membrane 40 .

It can be understood that the reflective layer 45 and the primer layer 46 can be used as an optical film layer. Of course, the optical film layer is not limited to the reflective layer 45 and the primer layer 46 listed in the above embodiment, and it can also include other laminated layers. Do repeat.

Next, a method for preparing a membrane is described, which can be used to prepare the membrane 40 in the above embodiment. Of course, this method can also be used to prepare other types of membranes, and details will not be described here.

Please refer to FIG. 12 . FIG. 12 discloses a flowchart of a method for preparing a membrane in an embodiment of the present application. The method includes:

Step S1201: Coating a photo-crosslinkable polymer liquid crystal on the transfer film and performing photo-alignment to produce at least one liquid crystal layer with a predetermined liquid crystal pattern.

In some embodiments, the liquid crystal layer can be fabricated separately during the film preparation process, and then the prepared liquid crystal layer can be used directly in the film lamination process. Making the liquid crystal layer alone can improve the production efficiency of the liquid crystal layer, and can also improve the quality of the liquid crystal layer, which indirectly improves the production efficiency and quality of the diaphragm during the diaphragm manufacturing process.

Making the liquid crystal layer separately can make the production efficiency and quality of the liquid crystal layer not be affected by the film making process. In the prior art, the production process of the liquid crystal layer needs to be carried out after the preparation of other laminated layers in the diaphragm, that is, the liquid crystal layer is fabricated on other laminated layers that have been prepared, so that the production of the liquid crystal layer depends on the production of other laminated layers process, so that the production efficiency and quality of the liquid crystal layer also seriously affect the production efficiency of the diaphragm and the quality of the diaphragm.

For the formula composition and coating thickness of the photocrosslinkable polymer liquid crystal liquid and the thickness of the liquid crystal layer, please refer to the description about the photocrosslinkable polymer liquid crystal liquid, the first liquid crystal layer 42 and the second liquid crystal layer 43 in the above-mentioned embodiments. , without repeating the details.

In some embodiments, the transfer film can be made of the same material as the film substrate 41 in the embodiment shown in FIG. The film is used as the base material of the film, and the liquid crystal layer is used as the first liquid crystal layer 42, which is directly used in the film without separating the transfer film from the liquid crystal layer. In addition, on this basis, another set of transfer films and the liquid crystal layer Separation is carried out, and the liquid crystal layer is utilized in the diaphragm as the second liquid crystal layer 43, so the material change of the transfer film can reduce the separation of the diaphragm base material 41 and the liquid crystal layer such as the first liquid crystal layer 42, and directly the diaphragm base material 41 and a liquid crystal layer such as the first liquid crystal layer 42 are used in combination.

In an embodiment, please refer to FIG. 13, which discloses a schematic flow chart of the preparation process of the liquid crystal layer in an embodiment of the present application. The method for the liquid crystal layer may include:

Step S1301: Coating a release agent on the transfer film.

Coating the release agent on the transfer film can facilitate the subsequent release of the liquid crystal layer, avoiding the adhesion of the liquid crystal layer and the transfer film, and also avoiding the damage of the liquid crystal layer during the release process. In one embodiment, when the release agent is coated on the transfer film, the release force of the release agent is 10-20 g/in. 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: 4-6% polyethylene, 0.1-1% crosslinking agent, 0.5-1% polymerization inhibitor and 92-95% toluene in terms of mass percentage. The preparation method of the release agent may include: adding polyethylene into toluene for stirring, and then adding a crosslinking agent and a polymerization inhibitor for stirring to form the release agent. Wherein, in some embodiments, polyethylene can be added into toluene and stirred for 25-30 minutes before adding other components. In some embodiments, the timing of adding the crosslinking agent and polymerization inhibitor can be controlled 5-10 minutes before using the release agent in the process of making the liquid crystal layer. In addition, it can be stirred for 3-5 minutes after the addition of the crosslinking agent and polymerization inhibitor. Use the release agent immediately after 10 minutes.

Step S1302: Coating photo-crosslinkable polymer liquid crystal liquid on the release agent.

As for the photo-crosslinked polymer liquid crystal liquid, please refer to the introduction about the liquid crystal layer in the above-mentioned film, and will not repeat them here.

Step S1303: Cover the photo-crosslinkable polymer liquid crystal on the transfer film with a photomask having a predetermined pattern.

In some embodiments, the photomask material is a transparent material such as quartz glass, which can be specifically manufactured through steps such as chrome plating, coating, developing, and etching. The photomask includes a photoresist area forming a preset pattern, a semi-transmissive area, and a fully transparent area. The size and shape of each area can be customized. The photomask has the function of selectively transmitting ultraviolet light, and due to the existence of the preset pattern of the photomask, the energy of ultraviolet light passing through different regions of the photomask is different, so that the photocrosslinkable polymer liquid crystal liquid The liquid crystal is aligned so that the preset pattern on the photomask is transferred into the liquid crystal layer, so that the preset liquid crystal pattern composed of the aligned liquid crystal is the same as the preset pattern.

Step S1304: Perform exposure processing.

In some embodiments, a photomask with a preset pattern is placed between the light source and the photo-crosslinked polymer liquid crystal liquid on the transfer film, and after exposure treatment, the preset liquid crystal pattern in the liquid crystal layer has an orientation and presents a color .

In some embodiments, the photo-crosslinked polymer liquid crystal liquid will have a certain orientation to become a cholesteric liquid crystal under the action of light irradiation and curing, so as to reflect and refract light and present colors. In some embodiments, the exposure energy during the exposure process is 500-1000 mj/cm ² .

Step S1305: demoulding to form a liquid crystal layer.

In some embodiments, the transfer film and the liquid crystal layer can be released and separated by the action of the release agent. In addition, the transfer film can be separated from the liquid crystal layer through the action of a release agent when the liquid crystal layer is laminated to make a film. Of course, the separation of the transfer film and the liquid crystal layer can be separated when the liquid crystal layer is used, or the transfer film can be separated from the liquid crystal layer by the action of the release agent in advance, and the separated liquid crystal layer can be stored and used in the liquid crystal layer. The liquid crystal layer is taken out for use when laminating layers to make a film.

It can be understood that the transfer film can be made of the same material as the film substrate 41, so that in the process of making the film, the glue used to make the bonding layer, such as the first bonding layer 401 and the second bonding layer 402, can be used instead Release agent, making the transfer film and the liquid crystal layer as one, directly using the transfer film as the film base material, and using the liquid crystal layer as the first liquid crystal layer 42, directly in the film, without the need to separate the transfer film and the liquid crystal layer Release and separate. In addition, on this basis, another group of transfer films made of a release agent is separated from the liquid crystal layer, and the liquid crystal layer is used as the second liquid crystal layer 43 in the diaphragm, so the change of the material of the transfer film can reduce the number of diaphragms. The substrate 41 is separated from 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 is used directly.

Furthermore, one side or two opposite sides of the transfer film can be used to prepare the liquid crystal layer, thereby improving the preparation efficiency and saving materials. When there is an adhesive layer, two liquid crystal layers can be arranged on opposite sides of the transfer film by using the adhesive layer, and the transfer film with the liquid crystal layer can be directly used in the lamination of the diaphragm, Further improve production efficiency.

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

For the diaphragm, its specific lamination structure will be pre-designed, and the specific lamination structure will have a preset number of layers and a preset lamination position. For example, you can refer to the preset number of layers and the preset stacking position of the liquid crystal layer and the optical film layer in any of the embodiments shown in Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10 and Fig. 11 . Then, when the liquid crystal layers such as the first liquid crystal layer and the second liquid crystal layer are ready, step S1202 can be followed to complete the lamination of the diaphragms.

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

Step S1401: Laminating at least one liquid crystal layer and a film substrate to form a second stack.

In some embodiments, a membrane substrate is also present in the membrane to enhance the performance of the membrane. Please refer to FIG. 5 , FIG. 7 , FIG. 8 , FIG. 9 , FIG. 10 and FIG. 11 for the lamination position of the diaphragm base material and the design of the diaphragm base material in any of the embodiments, and no further description is given.

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

Step S1402: performing UV transfer printing of the texture layer on the second stack to form the first stack.

The texture layer can be directly UV-transferred to be placed on other laminated layers. Of course, the texture layer can also be pasted and set through the pasting layer. In one embodiment, the texture layer can also be manufactured in advance in the same manner as the liquid crystal layer, for example, UV transfer is performed on the transfer film, and then the texture layer is formed by demoulding. In one embodiment, a release agent can be coated on the transfer film, UV transfer can be performed on the release agent, and the texture layer can be formed by releasing the mold. In one embodiment, a UV transfer machine can be used to evenly coat a layer of cured glue on the release agent of the transfer film. The cured glue composition can mainly include polyurethane acrylate, and the thickness of the cured glue can be 7-9 μm. After irradiation, the curing glue is cured, and the energy of ultraviolet light is 1000-1200MJ to form a texture layer.

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

For optical film layers, reflective and primer layers may be included. A reflective layer may be provided on the first laminate, and then a primer layer may be provided on the side of the reflective layer away from the first laminate. For the lamination structure and lamination position of the reflective layer, please refer to the structure, thickness and lamination position of the reflective layer 45 in the embodiment shown in FIG. 5 , FIG. 7 , FIG. 8 and FIG. In one embodiment, the coating method of the reflective layer may be any one of physical vapor deposition coating methods such as vapor deposition, continuous line sputtering, and furnace sputtering.

In one embodiment, physical vapor deposition can be used to form a multilayer optical thin film coating on the first stack, and the material of the optical thin film coating can be one of Nb ₂ O ₅ , Al ₂ O ₃ , TiO ₂ and SiO ₂ one or more species.

For the lamination structure and lamination position of the primer layer, refer to the structure and thickness of the primer layer 46 in the embodiment shown in FIG. 5 , FIG. 7 , FIG. 8 and FIG. 10 . In one embodiment, the primer layer is an ink layer, and the ink layer can be screen-printed on the side of the reflective layer away from the first laminate. Specifically, the ink layer can be printed on the reflective layer by screen printing, and the film of the printed ink layer can be baked in an oven. The baking temperature can be 75-95° C., and the baking time can be 25-40 minutes. After the ink is cured, a primer layer can be formed. In one embodiment, the baking temperature may be 80° C., and in one embodiment, the baking time may be 30 minutes.

Please refer to FIG. 15 . FIG. 15 discloses a graph of the reflectance of the film for various wavelengths of visible light in an embodiment of the present application. The membrane was fabricated by the membrane preparation method in the above embodiment, and the reflectance of the membrane to visible light of each wavelength was measured. It can be seen that in the visible light with a wavelength of 400-760nm, as the wavelength changes, the reflectance fluctuates, and the reflectance fluctuates greatly in the red light color region of 600-700nm, and the red light reflectance can exceed 90%. Among them, the metal texture is also strong.

The explosion-proof diaphragm produced by this application can not only produce customized arbitrary pattern effects, but also make the color of the gradient area have a highly reflective metallic texture and angle-changing effect, which is currently impossible for other processes. The above is only the implementation of the application, and does not limit the patent scope of the application. Any equivalent structure or equivalent process conversion made by using the specification and drawings of the application, or directly or indirectly used in other related All technical fields are equally included in the patent protection scope of the present application.

Claims (20)

1. A diaphragm, characterized in that it comprises:

   The liquid crystal layer is provided with a preset liquid crystal pattern composed of oriented liquid crystals, and the preset liquid crystal pattern is configured to be photo-controlled by a photo-crosslinked polymer liquid crystal under a photomask provided with a preset pattern. formed; and

   The optical film layer is stacked with the liquid crystal layer.
2. The diaphragm according to claim 1, further comprising:

   The texture layer has a texture pattern, is stacked with the optical film layer and the liquid crystal layer, and is located on a side of the optical film layer facing the liquid crystal layer.
3. The diaphragm according to claim 2, wherein the liquid crystal layer comprises:

   The first and second liquid crystal layers are stacked, and each of the first and second liquid crystal layers is stacked with the optical film layer and the texture layer.
4. The diaphragm according to claim 3, wherein the texture layer is located on the same side of the first and second liquid crystal layers.
5. The diaphragm according to claim 3, further comprising:

   a film substrate, used to transmit light, the film substrate is stacked with the first and second liquid crystal layers, the film substrate is located between the first and second liquid crystal layers or the The same side of the first and second liquid crystal layers.
6. The diaphragm according to any one of claims 3-5, characterized in that each of the first and second liquid crystal layers comprises cholesteric liquid crystals with a thickness of 2-3 μm.
7. The diaphragm according to any one of claims 2-5, wherein the optical film layer comprises:

   a reflective layer stacked with the liquid crystal layer; and

   The primer layer is stacked with the reflective layer and is located on the side of the reflective layer away from the liquid crystal layer.
8. The diaphragm according to claim 7, wherein the reflective layer comprises a first optical thin-film coating layered with the liquid crystal layer, the thickness of the first optical thin-film coating is 150-500 nm, and the material is TiO ₂ or SiO ₂ .
9. The diaphragm according to claim 8, wherein the reflective layer further comprises a second optical thin-film coating layered with the first optical thin-film coating, and the material of the second optical thin-film coating is _{Nb2O 5.} One or more of Al ₂ O ₃ , TiO ₂ and SiO ₂ .
10. The diaphragm according to any one of claims 2-5, characterized in that the highest reflectance of the diaphragm reflecting visible light with a wavelength of 400-760 nm is greater than 90%.
11. A casing, characterized in that it comprises:

    a substrate for transmitting light; and

    A diaphragm, the diaphragm is fixed on one side of the base body and stacked with the base body, the diaphragm includes:

    The liquid crystal layer is provided with a preset liquid crystal pattern composed of oriented liquid crystals, and the preset liquid crystal pattern is configured to be photo-controlled by a photo-crosslinked polymer liquid crystal under a photomask provided with a preset pattern. formed; and

    The optical film layer is stacked with the liquid crystal layer.
12. An electronic device, characterized in that it comprises:

    housing, including:

    a substrate for transmitting light; and

    A diaphragm, the diaphragm is fixed on one side of the base body and stacked with the base body, the diaphragm includes:

    The liquid crystal layer is provided with a preset liquid crystal pattern composed of oriented liquid crystals, and the preset liquid crystal pattern is configured to be photo-controlled by a photo-crosslinked polymer liquid crystal under a photomask provided with a preset pattern. formed; and

    an optical film layer stacked with the liquid crystal layer; and

    The display module is arranged on the casing.
13. The electronic device according to claim 12, further comprising:

    The texture layer has a texture pattern, is stacked with the optical film layer and the liquid crystal layer, and is located on a side of the optical film layer facing the liquid crystal layer.
14. The electronic device according to claim 13, wherein the liquid crystal layer comprises:

    The first and second liquid crystal layers are stacked, and each of the first and second liquid crystal layers is stacked with the optical film layer and the texture layer.
15. The electronic device according to claim 14, wherein each of the first and second liquid crystal layers comprises cholesteric liquid crystals with a thickness of 2-3 μm.
16. The electronic device according to any one of claims 13-14, characterized in that the highest reflectance of the diaphragm reflecting visible light with a wavelength of 400-760 nm is greater than 90%.
17. A method for preparing a membrane, characterized in that it comprises:

    Coating photo-crosslinkable polymer liquid crystal liquid on the transfer film and carrying out photo-controlled alignment to produce at least one liquid crystal layer with a preset liquid crystal pattern;

    The at least one liquid crystal layer and the optical film layer are stacked according to a preset number of layers and a preset stacking position.
18. The method according to claim 17, characterized in that, coating the photo-crosslinked polymer liquid crystal on the transfer film and carrying out photo-controlled alignment to produce at least one liquid crystal layer with a preset liquid crystal pattern, comprising:

    Coating a release agent on the transfer film;

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

    Covering the photo-crosslinked polymer liquid crystal on the transfer film with a photomask having a preset pattern;

    perform exposure processing;

    Release the mold to form a liquid crystal layer.
19. The method according to claim 17, wherein before the at least one liquid crystal layer and the optical film layer are stacked according to a preset number of layers and a preset stacking position, the method further comprises:

    UV transfer printing on the transfer film;

    Release the mold to form a texture layer;

    The lamination of the at least one liquid crystal layer and optical film layer according to the preset number of layers and the preset stacking position includes:

    Laminating the at least one liquid crystal layer, the film substrate, and the texture layer according to a preset number of layers and a preset stacking position to form a first stack;

    An optical film layer is disposed on the first stack.
20. The method according to claim 17, wherein the lamination of the at least one liquid crystal layer and the optical film layer according to a preset number of layers and a preset stacking position includes:

    Laminating the at least one liquid crystal layer and the film substrate to form a second laminate;

    Carrying out UV transfer printing of the texture layer on the second stack to form a first stack;

    An optical film layer is disposed on the first stack.

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