CN215910761U

CN215910761U - Liquid crystal membrane and device for preparing same

Info

Publication number: CN215910761U
Application number: CN202120572672.5U
Authority: CN
Inventors: 周洪喜
Original assignee: Individual
Current assignee: Shenzhen Goethe Innovation Technology Co ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2022-02-25
Anticipated expiration: 2031-03-19

Abstract

The utility model discloses a liquid crystal membrane and a device for preparing the same. The liquid crystal diaphragm comprises a first conducting layer and a second conducting layer arranged opposite to the first conducting layer, a liquid crystal flow limiting layer used for limiting liquid crystal flow is further clamped between the first conducting layer and the second conducting layer, the liquid crystal flow limiting layer divides a gap between the first conducting layer and the second conducting layer into a plurality of cavity units, and liquid crystal is filled in the cavity units. The liquid crystal flow limiting layer contained in the liquid crystal membrane can limit the liquidity of the liquid crystal in each cavity unit, so that the distribution uniformity of the liquid crystal in the transportation and standing state of the liquid crystal membrane is effectively ensured, the display stability of the liquid crystal membrane is ensured, and the display definition is high. The device for preparing the liquid crystal membrane can prepare the liquid crystal membrane with the liquid crystal flow limiting layer.

Description

Liquid crystal membrane and device for preparing same

Technical Field

The utility model belongs to the technical field of liquid crystal diaphragms, and particularly relates to a liquid crystal diaphragm and a device for preparing the same.

Background

The liquid crystal film is a novel electric control optical product, the electric control liquid crystal film device is characterized in that liquid crystal or a mixed material of liquid crystal and high molecular polymer is injected between two transparent conductive films, liquid crystal molecules between the two transparent conductive films are in disorderly alignment under the condition that voltage is not applied to the transparent conductive films, the electric control liquid crystal film is in an opaque state (OFF state), when voltage is applied to the transparent conductive films, the liquid crystal molecules between the two transparent conductive films are in orderly alignment, and the electric control liquid crystal film is converted into a transparent state (ON state). The liquid crystal film is driven by an electric field, and can realize rapid switching from an on state to an off state, and between the off state and the on state. The dimming glass adhered with the liquid crystal film has a decoration function, and a unique decoration effect is formed by changing the transparency and the opacity of the interior of the glass, so that a simple glass curtain wall is changed into artistic glass. Also has functional effects, such as sunscreen, privacy protection, etc.

The structure of a conventional liquid crystal film such as a liquid crystal writing pad and a liquid crystal dimming film (hereinafter, referred to as a liquid crystal film) is shown in fig. 1, in which a mixture formed by fully mixing a liquid crystal material and a high molecular polymer or a polymer monomer is uniformly sandwiched between two transparent conductive films 1, and then polymerized and cured by UV or heating to form a liquid crystal layer 2. However, the adding ratio of the liquid crystal material and the high polymer material has a great influence on the quality of the handwriting board and the light modulation film, the ratio directly influences the writing contrast and the edge definition of the handwriting board, and the light modulation film mainly influences the haze of the light modulation film, so that the adding amount of the high polymer added in the existing liquid crystal film cannot be too high, liquid crystal (although a certain amount of high polymer) in the liquid crystal film has certain fluidity, and when the liquid crystal film with a large area is transported and installed vertically, the liquid crystal film sinks due to gravity to cause unevenness, even cause the failure of the liquid crystal film.

As shown in fig. 2, the conventional apparatus for manufacturing a liquid crystal film directly encapsulates liquid crystal and a small amount of high molecular polymer or monomer thereof between conductive films which are oppositely arranged, so that the manufactured liquid crystal film cannot completely restrict the flow of the liquid crystal.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a liquid crystal film, and aims to solve the technical problem that the liquid crystal film is uneven in liquid crystal distribution and even fails when the existing liquid crystal film is transported and erected due to the liquidity of liquid crystals.

Another object of the present invention is to provide an apparatus for preparing the liquid crystal film of the present invention, so as to overcome the technical problem that the liquid crystal film prepared by the existing apparatus for preparing the liquid crystal film can not limit the fluidity of the liquid crystal.

In order to achieve the above object, according to an aspect of the present invention, a liquid crystal film is provided. The liquid crystal membrane comprises a first conducting layer and a second conducting layer arranged opposite to the first conducting layer, wherein a liquid crystal flow limiting layer used for limiting liquid crystal flow is clamped between the first conducting layer and the second conducting layer, a gap between the first conducting layer and the second conducting layer is divided into a plurality of cavity units by the liquid crystal flow limiting layer, and liquid crystal is filled in the cavity units.

Preferably, the liquid crystal flow restriction layer is any one of a grid layer, a plurality of non-intersecting spacer array layers, or a layer structure including a grid region and a plurality of non-intersecting spacer array regions.

Preferably, the thickness of the liquid crystal flow restriction layer is 1 to 30 μm.

Preferably, the liquid crystal flow restriction layer between adjacent cavity units has a skeleton width of 0.1 μm to 10 cm.

Preferably, when the liquid crystal flow limiting layer is a grating layer or comprises a grating area, the cavity unit is a grating cavity unit, and the area of a single cavity unit is 0.01 square micrometer to 100 square centimeters. Or

When the liquid crystal flow limiting layer is a plurality of non-crossed parting bead array layers or comprises a plurality of non-crossed parting bead array areas, the distance between two adjacent parting beads in the plurality of non-crossed parting bead array layers or the plurality of non-crossed parting bead array areas is not more than 10 mm.

Preferably, the material of the liquid crystal flow restriction layer is a transparent high molecular polymer or a transparent inorganic material.

Preferably, the difference between the optical refractive index of the liquid crystal flow restriction layer and the ordinary optical refractive index of the crystal grains of the liquid crystal material is not more than 0.8.

Preferably, the first conductive layer and/or the second conductive layer are/is a transparent conductive film.

Preferably, a transparent substrate layer is further laminated on the surface of the first conductive layer and/or the second conductive layer, which surface faces away from the grid layer.

In another aspect of the present invention, an apparatus for preparing the liquid crystal film of the present invention is provided. The device comprises a pair of supporting rollers and a film pressing roller, wherein the supporting rollers and the film pressing roller are used for supporting a first conducting layer and a second conducting layer, and the supporting rollers and the film pressing roller are sequentially arranged along the conveying direction of the first conducting layer or the second conducting layer;

the transfer printing roller is arranged opposite to the support roller and rotates relatively under the conveying state of the first conductive layer and/or the second conductive layer; the pad printing roller and the concave roller are oppositely arranged and rotate relatively.

Preferably, above the lamination roller, a liquid crystal injection member for injecting liquid crystal between the first conductive layer and the second conductive layer is further included; and/or

And an ultraviolet curing part is also arranged on the conveying path of the first conducting layer or the second conducting layer and used for performing ultraviolet curing on the diaphragm subjected to the film pressing by the film pressing roller.

Compared with the prior art, the utility model has the technical effects that:

the liquid crystal diaphragm of the utility model seals liquid crystal in each space unit of the liquid crystal flow limiting layer, namely the cavity, by arranging the liquid crystal flow limiting layer between the oppositely arranged conducting layers, thus the liquid crystal flow limiting layer can limit the liquidity of the liquid crystal in each cavity, and the liquid crystal is prevented from flowing in a large range, thereby effectively ensuring the distribution uniformity of the liquid crystal when the liquid crystal diaphragm is in a transportation and vertical state, and ensuring the display stability of the liquid crystal diaphragm. And can effectively avoid or reduce the mixing of high molecular polymers in the liquid crystal, thereby effectively improving the display definition of the liquid crystal. In addition, the liquid crystal flow limiting layer also has the function of bonding the first conductive layer and the second conductive layer, so that the mechanical property of the liquid crystal membrane is improved, and the first conductive layer and the second conductive layer are prevented from being mutually stripped.

According to the device for preparing the liquid crystal diaphragm, the concave roller for forming the pattern layer and the transfer printing roller are arranged, the pattern layer of the liquid crystal flow limiting layer for limiting liquid crystal flow can be formed on the surface of the conductive layer, then the double-layer conductive lamination is realized through the film pressing roller, and the liquid crystal can be packaged in the space unit, so that the liquid crystal diaphragm with the liquid crystal flow limiting layer structure is prepared, the efficiency is high, and the quality is stable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other structural drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view (a schematic structural view of a cross section perpendicular to a liquid crystal film) of a conventional liquid crystal film;

FIG. 2 is a schematic structural view of a conventional apparatus for manufacturing a liquid crystal film;

FIG. 3 is a schematic structural diagram of a liquid crystal film (a schematic structural diagram of a cross section perpendicular to the liquid crystal film) according to an embodiment of the present invention;

FIGS. 4(a) to 4(g) are schematic diagrams of the cross-section parallel to the first conductive layer of the liquid crystal flow-limiting layer included in the liquid crystal film according to the embodiment of the utility model;

FIG. 5 is a schematic diagram showing the ordinary refractive index and the extraordinary refractive index of liquid crystal molecules;

FIG. 6 is an apparatus for preparing a liquid crystal film according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

The embodiment of the utility model provides a liquid crystal membrane. As shown in fig. 3 and fig. 4(a) to 4(g), the liquid crystal film according to the embodiment of the present invention includes a first conductive layer 20 and a second conductive layer 50 disposed opposite to the first conductive layer 20, a liquid crystal flow limiting layer 30 is further interposed between the first conductive layer 20 and the second conductive layer 50, the liquid crystal flow limiting layer 30 divides a gap between the first conductive layer 20 and the second conductive layer 50 into a plurality of cavity units 40, and the liquid crystal film seals the cavity units 40 and is filled with liquid crystal. In this way, in the liquid crystal membrane according to the embodiment of the present invention, the liquid crystal flow limiting layer 30 is disposed between the conductive layers which are disposed opposite to each other, that is, the first conductive layer 20 and the second conductive layer 50, and the liquid crystal is encapsulated in each grid unit of the liquid crystal flow limiting layer 30, so that the liquid crystal flow limiting layer 30 can limit the fluidity of the liquid crystal in the sealed cavity unit 40 of each grid unit, thereby avoiding the wide-range flow of the liquid crystal, and effectively ensuring the distribution uniformity of the liquid crystal when the liquid crystal membrane is in a transportation and standing state, so as to ensure the display stability of the liquid crystal membrane. In addition, the liquid crystal flow limiting layer 30 has the function of effectively bonding the first conductive layer 20 and the second conductive layer 50 after bonding treatment, so that the mutual peel strength of the first conductive layer 20 and the second conductive layer 50 is ensured, and the mechanical property of the liquid crystal membrane is improved. Meanwhile, the content of the high molecular polymer mixed in the liquid crystal can be effectively avoided or reduced, so that the display definition of the liquid crystal is effectively improved. In addition, due to the existence of the liquid crystal flow restriction layer 30, compared with the liquid crystal contained in the existing liquid crystal film, the liquid crystal may contain no high molecular polymer or a relatively small amount of high molecular polymer, that is, in the liquid crystal film, the content of the high molecular polymer in the liquid crystal may be present and adjusted not for considering the adjustment of the viscosity of the liquid crystal and the adhesion of the first conductive layer and the second conductive layer, but for having other requirements in the application, for example, in the embodiment, the mass content of the high molecular polymer contained in the liquid crystal may be 0-80% according to the mass requirement of the liquid crystal film.

The first conductive layer 20 and the second conductive layer 50 included in the liquid crystal film perform a conductive function, and in an embodiment, the first conductive layer 20 and the second conductive layer 50 may be transparent conductive films. As in the specific embodiment, first conductive layer 20 and second conductive layer 50 are not just ITO films, silver nanowire films, or other transparent conductive films. But may of course also be a conductive layer of other materials conventionally contained in liquid crystal films. In further embodiments, the first conductive layer 20 and the second conductive layer 50 may also be printed or etched in a desired pattern. In addition, the thicknesses of the first conductive layer 20 and the second conductive layer 50 may be adjusted as needed.

The liquid crystal flow restriction layer 30 included in the liquid crystal film for restricting the flow of liquid crystal is disposed between the first conductive layer 20 and the second conductive layer 50, and the liquid crystal flow restriction layer 30 and the first conductive layer 20 and the second conductive layer 50 as described above partition the gap between the first conductive layer 20 and the second conductive layer 50 into the plurality of cavity units 40. Therefore, the liquid crystal flow limiting layer 30 can effectively limit the fluidity of the liquid crystal in each cavity unit 40 as described above, and avoid the liquid crystal from flowing in a large range, thereby effectively ensuring the distribution uniformity of the liquid crystal when the liquid crystal membrane is in a transportation and standing state, and ensuring the display stability of the liquid crystal membrane.

Based on the above-described effect of the liquid crystal flow restriction layer 30, in the embodiment, the liquid crystal flow restriction layer 30 is any one of a grid layer, a plurality of non-intersecting spacer array layers, or a layer structure including a grid region and a plurality of non-intersecting spacer array regions. The grating layer or grating area may be, but not limited to, the grating layer shown in fig. 4(a), fig. 4(b), fig. 4(c) and fig. 4(d), and may be other shapes of grating layers. In the embodiment, when the liquid crystal flow restriction layer 30 is a grating layer or includes a grating region, the cavity unit 40 is a grating cavity unit, and the area of the single cavity unit 40 is 0.01 square micrometer to 100 square centimeters. The area of the single cavity unit 40 should be understood as a cross-sectional area parallel to the first conductive layer 20 or the second conductive layer 50. The area of a specific single grid cavity unit 40 can be adjusted according to specific application, so that the aim of effectively limiting the large-range flowing of the liquid crystal is achieved to the maximum, the limit limitation of a preparation process can be achieved to the minimum, and along with the reduction of the area of the single grid cavity unit 40, the area of the single grid cavity unit not only can limit the flowing of the liquid crystal, but also can adjust the haze of the liquid crystal membrane in the ON state and the OFF state.

When the liquid crystal flow restriction layer 30 is a plurality of non-intersecting spacer array layers or includes a plurality of non-intersecting spacer array regions, it may be, but is not limited to, a pattern layer as shown in fig. 4(e), 4(f), and 4(g), and may be a spacer array layer of other shapes. The maximum distance between two adjacent division bars in the array layer or the array area of the plurality of non-crossed division bars can reach the limit of the preparation process, and the minimum distance can reach the limit of the preparation process, for example, in the embodiment, the distance between two adjacent division bars is not more than-10 mm. With the reduction of the distance between two adjacent division bars, the liquid crystal film can not only limit the flowing of liquid crystal, but also adjust the haze when the liquid crystal film is in a dot quantity.

Regardless of whether the crystal flow restriction layer 30 is the grid layer or the plurality of non-crossed spacer array layers, when the crystal flow restriction layer 30 can simultaneously adjust the haze of the liquid crystal film, the liquid crystal molecules are randomly oriented and distributed under the condition of no voltage driving, as shown in fig. 5, when light is emitted to the display surface of the liquid crystal film, the refractive index (about n) of the liquid crystal (liquid crystal molecules) is about₀And n_eAverage refractive index of) and the refractive index (denoted as n) of the wall material of the crystal flow restriction layer 30_m) When the liquid crystal film is not matched, the liquid crystal film is in an opaque state (the liquid crystal film is in an OFF state); when the liquid crystal film changes the orientation of the liquid crystal therein by applying a voltage or the like so that the liquid crystal molecular orientation is uniform, if the refractive index n of the liquid crystal is equal₀Refractive index n of wall material of crystal flow limiting layer 30_mWhen equal or close to each other, the liquid crystal film becomes a fully transparent state (n)₀And n_mThe closer the refractive index value, the higher the transparency), and the presence of the crystal flow regulating layer 30 is not seen (the liquid crystal film is in the ON state). Changing the ON and OFF states of the liquid crystal diaphragm in this way can achieve the function of an electrically controlled light valve of the liquid crystal diaphragm. In the embodiment, the refractive index n of the wall material of the liquid crystal flow limiting layer 30_mRefractive index n with liquid crystal₀The difference is not more than 0.8. Thus, the transparency of the liquid crystal film in the ON state can be ensured. Wherein the refractive index n in FIG. 5₀The refractive index of the ordinary light of the liquid crystal is specifically the refractive index when the light is injected along the length axis direction of the liquid crystal; refractive index n_eThe refractive index of the extraordinary ray of the liquid crystal is specifically the refractive index of the ray when the ray is incident perpendicular to the longitudinal axis of the liquid crystal. For negative liquid crystalMatch n_eAnd n_mWhen the negative liquid crystal is electrified, the long axis direction of the liquid crystal molecules is vertical to the direction of the electric field.

Of course, the liquid crystal film is a non-trans liquid crystal film, and when the liquid crystal film is a trans liquid crystal film, the refractive index n of the wall material of the liquid crystal flow restriction layer 30 is set to be larger than the refractive index n of the wall material_mRefractive index n with liquid crystal₀And refractive index n_eThe opposite is true.

In addition to the liquid crystal flow restriction layer 30 of each of the above embodiments, the thickness of the liquid crystal flow restriction layer 30 may be 1 to 30 μm in the embodiments. The thickness of the liquid crystal flow-restricting layer 30 is understood to be the vertical distance between the first conductive layer 20 and the second conductive layer 50. In other embodiments, the width of the ribs 31 of the liquid crystal flow restriction layer 30 between adjacent cavity units 40 is 0.01 μm to 10 cm. The liquid crystal flow limiting layer 30 can be adjusted according to actual needs, the width of the framework 31 can be adjusted, the mechanical property of the liquid crystal flow limiting layer 30 can be adjusted, the bonding strength of the first conductive layer and the second conductive layer can be enhanced, the liquid crystal flow limiting effect of the liquid crystal flow limiting layer can be improved, and the haze effect of the liquid crystal flow limiting layer 30 can be adjusted.

The material of the liquid crystal flow restriction layer 30 in each of the above embodiments may be a high molecular polymer commonly used in the field of liquid crystal films, such as an adhesive. Specifically, the polymer may be an ultraviolet-curable polymer or a thermosetting polymer. Or transparent inorganic substance (such as transparent SiO)₂Etc.) or a gel or the like

In addition to the above embodiments, the liquid crystal film further includes a transparent substrate layer, such as the transparent substrate layer 10 and the transparent substrate layer 60 in fig. 3. The transparent base layer 10 is laminated on the surface of the first conductive layer 20 facing away from the liquid crystal flow regulating layer 30, and the transparent base layer 60 is laminated on the surface of the second conductive layer 50 facing away from the liquid crystal flow regulating layer 30. Of course, the transparent substrate layer may include one layer, such as either of the transparent substrate layer 10 or the transparent substrate layer 60. The arrangement of the transparent substrate layer improves the mechanical property and the display stability of the liquid crystal membrane.

Correspondingly, the embodiment of the utility model also provides a preparation method of the liquid crystal membrane. With reference to fig. 3 and fig. 4(a) to 4(g), the method for preparing the liquid crystal film of the embodiment of the present invention includes the following steps:

s01: forming a pattern layer of a liquid crystal flow restriction layer for restricting a flow of liquid crystal on a surface of the first conductive layer 20 and/or the second conductive layer 50 such that the grid pattern layer divides the surface of the first conductive layer 20 and/or the second conductive layer 50 into a plurality of space units;

s02: filling liquid crystal into each space unit of the pattern layer;

s03: and (3) oppositely bonding the first conductive layer 20 and the second conductive layer 50, forming a liquid crystal flow limiting layer 30 between the first conductive layer 20 and the second conductive layer 50 by the pattern layer, and packaging liquid crystal in a cavity unit 40 formed by each space unit and the first conductive layer 20 and the second conductive layer 50 to form the liquid crystal membrane.

Thus, according to the preparation method of the liquid crystal membrane in the embodiment of the utility model, the liquid crystal flow limiting layer 30 is formed between the first conductive layer 20 and the second conductive layer 50, and the liquid crystal is packaged in the cavity units 40, so that the distribution uniformity of the liquid crystal in the transportation and standing state of the liquid crystal membrane is effectively ensured, the display stability of the liquid crystal membrane is ensured, and the mixing of high molecular polymers in the liquid crystal can be effectively avoided or reduced, thereby effectively improving the display definition of the liquid crystal. In addition, the preparation method of the liquid crystal membrane provided by the embodiment of the utility model has the advantages that the process conditions are easy to control, the stable quality of the prepared liquid crystal membrane can be effectively ensured, and the efficiency is high.

The specifications, such as thickness and material, of the first conductive layer 20 and the second conductive layer 50 in step S01 are the same as those of the first conductive layer 20 and the second conductive layer 50 described in the liquid crystal film according to the embodiment of the present invention, and are not repeated herein for the sake of saving the description of the present invention.

In an embodiment, the method of forming the lattice body pattern on the surface of the first conductive layer 20 and/or the second conductive layer 50 in step S01 may use a stencil copy method, a pad printing method, a screen printing method, a photolithography method, a dispensing method, a paste printing method (like an inkjet printer and a 3D printer), or the like to form a pattern layer, wherein when the pattern layer is formed by the pad printing method, the pattern layer may be formed on the surface of the first conductive layer 20 and/or the second conductive layer 50 according to a gravure roll transfer apparatus shown in fig. 6. The pattern layer may be formed on the surface of either the first conductive layer 20 or the second conductive layer 50, or may be formed on both the surfaces of the first conductive layer 20 and the second conductive layer 50.

When the pattern layer is formed by the pad printing method, a material paste for forming the pattern layer should be formed on the first conductive layer 20 and/or the second conductive layer 50 to form the pattern layer. The material paste for forming the pattern layer is a paste formed by a material or a material precursor of the liquid crystal flow limiting layer 30 in the liquid crystal film according to the embodiment of the present invention.

In an embodiment, SPACERs (SPACERs) may be further disposed on the surface of the first conductive layer 20 and/or the second conductive layer 50 forming the pattern layer, such as spray SPACERs (SPACERs), or SPACERs distributed in the pattern layer (SPACERs), or SPACERs disposed on each of the first conductive layer 20, the second conductive layer 50 and the pattern layer (SPACERs), so as to precisely adjust and control the distance between the first conductive layer 20 and the second conductive layer 50.

The liquid crystal in step S02 may be a liquid crystal material commonly used in the field of liquid crystal films. Since the patterned layer is formed in step S01, the liquid crystal in step S02 may contain no high molecular polymer or a relatively small amount of high molecular polymer compared to the liquid crystal contained in the existing liquid crystal film, and the mass content of the high molecular polymer contained in the liquid crystal in step S02 may be 0-80% according to the mass requirement of the liquid crystal film sheet, as in the examples.

In an embodiment, the liquid crystal in step S02 may also be mixed with a SPACER (SPACER) to adjust and control the spacing between the first conductive layer 20 and the second conductive layer 50.

The method of the relative adhesion processing of the first conductive layer 20 and the second conductive layer 50 in step S03 may be processed according to a two-conductive film adhesion method of an existing liquid crystal film, such as a roll bonding process in fig. 6 (so that the patterned layers of the first conductive layer 20 and/or the second conductive layer 50 are adhered to each other to form a cavity unit 40 with a plurality of cavity units, and the liquid crystal is encapsulated in the cavity unit 40). When the pattern layers are formed on both the first conductive layer 20 and/or the second conductive layer 50, the surfaces of the first conductive layer 20 and/or the second conductive layer 50 on which the pattern layers are provided are disposed opposite to each other during the relative adhesion treatment. The polymer material of the liquid crystal flow restriction layer 30 itself may be used as an adhesive, or an adhesive may be additionally coated on the surface of the conductive film without the patterned layer, so that the patterned layer forms the liquid crystal flow restriction layer 30 between the first conductive layer and the second conductive layer after the adhesion process. The liquid crystal flow restriction layer 30 formed is the liquid crystal flow restriction layer 30 contained in the above liquid crystal film.

In the embodiment, when the liquid crystal film manufacturing method is manufactured by using the apparatus shown in fig. 6, the liquid crystal film is manufactured by the following process steps:

a: adding the material paste forming the liquid crystal flow restriction layer 30 onto the concave roller 04 having the pattern layer formed thereon; then, the product is processed

b: transferring the paste on the concave roller 04 onto the surface of the first conductive layer 20 and/or the second conductive layer 50 by the transfer roller 03 to form a pattern layer on the surface of the first conductive layer 20 and/or the second conductive layer 50; then the

c: the first conductive layer 20 and the second conductive layer 50 are oppositely arranged and are led between film pressing rollers 02, and after liquid crystal is added between the first conductive layer 20 and the second conductive layer 50, film pressing treatment and curing treatment are carried out, so that the liquid crystal diaphragm is formed.

The device shown in FIG. 6 is adopted to prepare the liquid crystal diaphragm, so that the production efficiency of the liquid crystal diaphragm can be effectively improved, and the quality and performance stability of the prepared liquid crystal diaphragm can be ensured.

On the other hand, the embodiment of the utility model also provides a device for the liquid crystal membrane. The structure of the device for the liquid crystal film of the utility model is shown in fig. 6, and comprises a support roller 01, a film pressing roller 02, a pad printing roller 03 and a concave roller 04. Among them, the supporting roller 01 serves to support the first conductive layer 20 and the second conductive layer 50, and when the first conductive layer 20 and the second conductive layer 50 are formed on the substrate, the supporting roller 01 serves to support the first conductive layer 20 and the second conductive layer 50 containing the substrate. The substrate may be a plastic film, such as a PET film plated with ITO, the lamination roller 02 is used for laminating the first conductive layer 20 and the second conductive layer 50, and the support roller 01 and the lamination roller 02 are disposed back and forth along the conveying path direction of the first conductive layer 20 or the second conductive layer 50. The transfer roller 03 is disposed opposite to the support roller 01, and rotates relatively in a state where the first conductive layer 20 and/or the second conductive layer 50 are conveyed; the concave roller 04 has a pattern layer formed thereon, and is disposed opposite the transfer roller 03 so as to be in close contact therewith and to rotate relatively, thereby transferring the pattern layer contained in the concave roller 04 to the surface of the transfer roller 03. Among them, the pattern layer on the gravure roll 04 should be a gravure pattern forming the above liquid crystal flow restriction layer 30. In addition, the transfer roller 03 and the concave roller 04 may be only one, and if the transfer roller 03 and the concave roller 04 on the left side in the figure of fig. 6 or the transfer roller 03 and the concave roller 04 on the right side in the figure, it is needless to say that the transfer roller 03 and the concave roller 04 are provided on both the left side and the right side in the figure. In addition, the polymer glue in fig. 6 may be a polymer or a monomer of a polymer.

In this way, the device for manufacturing a liquid crystal membrane according to the embodiment of the present invention can form the pattern layer of the liquid crystal flow restriction layer 30 on the surface of the conductive layer (the first conductive layer 20 and/or the second conductive layer 50) by the arrangement of the gravure roll 04 having the pattern layer and the pad printing roll 03, and then realize the double-layer conductive lamination by the lamination roll 02 and can encapsulate the liquid crystal in the grid unit, thereby manufacturing the liquid crystal membrane having the grid structure, with high efficiency and stable quality.

In an embodiment, above the squeeze film roller 02, a liquid crystal injector 06 for injecting liquid crystal between the first conductive layer 20 and the second conductive layer 50 is further included. In addition, the liquid crystal injector 06 can control the release of the liquid crystal through an automatic system, so that the synchronization with the lamination of the film pressing roller 02 is realized. The liquid crystal injection piece 06 is additionally arranged, so that the convenience and uniformity of liquid crystal injection can be improved, and the quality and efficiency of preparing a liquid crystal diaphragm are improved.

In an embodiment, an ultraviolet curing member 07 is further disposed on the conveying path of the first conductive layer 20 or the second conductive layer 50, and is used for performing ultraviolet curing on the film after lamination by the lamination roller 02.

In an embodiment, a film releasing roller 08 is further disposed on the conveying path of the first conductive layer 20 and/or the second conductive layer 50, and is used for controlling the first conductive layer 20 and/or the second conductive layer 50 to be conveyed to the supporting roller 01 in a straightening manner.

The above technical solution is illustrated by a plurality of examples below.

Example 1:

the embodiment provides a multistable liquid crystal light adjusting film and a preparation method thereof. As shown in fig. 3 and fig. 4(a) to 4(g), the multistable liquid crystal dimming film structure includes a first conductive layer 20 and a second conductive layer 50 disposed opposite to the first conductive layer 20, a liquid crystal flow limiting layer 30 is further interposed between the first conductive layer 20 and the second conductive layer 50, the liquid crystal flow limiting layer 30 of the multistable liquid crystal dimming film divides a gap between the first conductive layer 20 and the second conductive layer 50 into a plurality of sealed cavity units 40, the sealed cavity units 40 of the multistable liquid crystal dimming film are filled with liquid crystal, an addition amount of a high molecular polymer (binder) in the liquid crystal filled in the sealed cavity units 40 is 0, and a thickness of the liquid crystal flow limiting layer 30, that is, a distance between the first conductive layer 20 and the second conductive layer 50 is set to be 9 μm. The cavity unit area of the liquid crystal flow limiting layer is a square grid of 3 multiplied by 3 mm, the width of the cavity wall is 0.5 mm, and the total area of the light adjusting film is 40 cm multiplied by 40 cm.

This example of a method for producing a multistable liquid crystal light-adjusting film was prepared as described above using the apparatus shown in FIG. 6

Through detection, the haze of the multistable liquid crystal light-adjusting film in the embodiment reaches below 0.44 (wherein the contribution of the film to the haze is 0.42, and the contribution of liquid crystal to the haze is less than 0.02), the tensile strength reaches above 2.5N/square centimeter, the flow of liquid crystal is blocked due to the existence of the liquid crystal flow limiting layer 30, and the liquid crystal film normally works after standing at a constant temperature of 50 ℃ for 1 month.

Example 2:

the embodiment provides a liquid crystal handwriting board and a preparation method thereof. The structure of the film was similar to that of the multistable liquid crystal light adjusting film in example 1, and a liquid crystal flow regulating layer 30 was additionally provided in the opposite conductive layer.

The liquid crystal special for the writing board is filled in the sealed cavity unit 40 in the liquid crystal flow limiting layer 30, the addition amount of a high molecular polymer (binder) in the liquid crystal filled in the sealed cavity unit 40 is 30 wt%, the thickness of the liquid crystal flow limiting layer 30, namely the distance between the first conducting layer 20 and the second conducting layer 50, can be 15 micrometers, the area of the cavity unit of the liquid crystal flow limiting layer is a square grid of 2 x 2 millimeters, the width of the cavity wall is 0.2 millimeter, the size of the liquid crystal writing board is 20 x 20cm, and after the writing board is erected at a constant temperature of 30 ℃ for 30 days, the liquid crystal distribution is kept uniform, the writing board works completely and normally, and the quality is not changed.

Example 3:

the embodiment provides a multistable liquid crystal light adjusting film and a preparation method thereof.

The embodiment provides a multistable liquid crystal light adjusting film and a preparation method thereof. This example provides a multistable liquid crystal light adjusting film structure substantially the same as that of example 1, except that the liquid crystal flow regulating layer 30 contained therein has a shape of a non-intersecting spacer array pattern as shown in fig. 4(e), and the pitch between adjacent spacers in the liquid crystal flow regulating layer 30 is 10 mm. The width of the parting strip is 0.5 mm, and the total area of the light adjusting film is 30 cm multiplied by 30 cm.

Through detection, the haze of the multistable liquid crystal light-adjusting film in the embodiment reaches below 1.9 (wherein the contribution of the film to the haze is 1.75, and the contribution of liquid crystal to the haze is less than 0.15), the tensile strength reaches above 1.7N/square centimeter, the flow of liquid crystal is blocked due to the existence of the liquid crystal flow limiting layer, and the liquid crystal film can normally work after standing at a constant temperature of 50 ℃ for 3 months.

Comparative example 1

A multistable liquid crystal light-adjusting film as shown in fig. 1 (not containing a grid layer compared with the multistable liquid crystal light-adjusting film in example 1) was prepared according to the prior art, wherein the addition amount of a high molecular polymer (binder) contained in the liquid crystal was 20%.

The multistable liquid crystal dimming film of the comparative example is tested to have a haze of greater than 8 and tensile strength of less than 0.5 newtons per square centimeter (too low). Meanwhile, the liquid crystal has fluidity and cannot be used for a long time (after the liquid crystal is erected for 12 hours, the upper part of the light adjusting film is obviously thinned, and the lower part of the light adjusting film is obviously thickened due to excessive liquid crystal, so that the light adjusting film cannot work normally).

Comparative example 2

A liquid crystal writing board as shown in FIG. 1 (different from example 2 in that the grid layer in example 2 is not included) was prepared according to the prior art, wherein the liquid crystal contains a high molecular polymer (binder) in an amount of 20%, the film pitch was 15 μm, and the film size was 20X 20 cm.

The detection shows that the liquid crystal is stood at the constant temperature of 30 ℃ for 30 days, and as a result, the liquid crystal is settled on the lower part of the liquid crystal film, the lower part of the liquid crystal film is obviously thickened, the upper part of the liquid crystal film has almost no writing effect, and when the lower part of the liquid crystal film is written, the product quality is invalid because too many lines of the liquid crystal are too thick.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid crystal film, characterized in that: the liquid crystal display device comprises a first conducting layer and a second conducting layer arranged opposite to the first conducting layer, wherein a liquid crystal flow limiting layer used for limiting liquid crystal to flow is further clamped between the first conducting layer and the second conducting layer, the liquid crystal flow limiting layer divides a gap between the first conducting layer and the second conducting layer into a plurality of cavity units, and liquid crystal is filled in the cavity units.

2. The liquid crystal film of claim 1, wherein: the liquid crystal flow limiting layer is any one of a grid layer and a plurality of non-crossed parting stop array layers or comprises a grid area and a layer structure formed by a plurality of non-crossed parting stop array areas; and/or

The thickness of the liquid crystal flow limiting layer is 1-30 μm; and/or

The framework width of the liquid crystal flow limiting layer between the adjacent cavity units is 0.1-10 cm.

3. The liquid crystal film of claim 2, wherein: when the liquid crystal flow limiting layer is a grating layer or comprises a grating area, the cavity unit is a grating cavity unit, and the area of a single cavity unit is 0.01 square micrometer to 100 square centimeters.

4. The liquid crystal film of claim 2, wherein: when the liquid crystal flow limiting layer is a plurality of non-crossed parting bead array layers or comprises a plurality of non-crossed parting bead array areas, the distance between two adjacent parting beads in the plurality of non-crossed parting bead array layers or the plurality of non-crossed parting bead array areas is not more than 10 mm.

5. The liquid crystal film of any of claims 1-4, wherein: the material of the liquid crystal flow limiting layer is transparent high molecular polymer or transparent inorganic material.

6. The liquid crystal film of any of claims 1-4, wherein: the difference between the optical refractive index of the liquid crystal flow limiting layer and the ordinary refractive index of the liquid crystal material is not more than 0.8.

7. The liquid crystal film of any of claims 1-4, wherein: the first conductive layer and/or the second conductive layer are/is a transparent conductive film.

8. The liquid crystal film of any of claims 2-4, wherein: and a transparent base layer is further laminated on the surface of the first conducting layer and/or the second conducting layer, which faces away from the grid layer.

9. An apparatus for producing a liquid crystal film of any one of claims 1 to 8, comprising a pair of a supporting roller and a lamination roller for supporting a first conductive layer and a second conductive layer, and the supporting roller and the lamination roller are disposed one after another in a conveying direction of the first conductive layer or the second conductive layer;

10. The apparatus of claim 9, wherein: the film pressing roller is arranged above the film pressing roller and further comprises a liquid crystal injection piece used for injecting liquid crystal between the first conductive layer and the second conductive layer; and/or

And an ultraviolet curing part is further arranged on the conveying path of the first conducting layer or the second conducting layer and used for carrying out ultraviolet curing treatment on the diaphragm subjected to film pressing by the film pressing roller.