CN114609819A

CN114609819A - Light modulation module, preparation method thereof and light modulation structure

Info

Publication number: CN114609819A
Application number: CN202210295386.8A
Authority: CN
Inventors: 梁鹏; 王昌银; 陈娟; 王春雷; 王瑛; 翟德深; 巨小倩; 张思凯; 吴小龙; 李展
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Sensor Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Sensor Technology Co Ltd
Priority date: 2022-03-23
Filing date: 2022-03-23
Publication date: 2022-06-10

Abstract

The embodiment of the application provides a dimming module, a preparation method thereof and a dimming structure. This module of adjusting luminance includes: a first liquid crystal dimming film; the first liquid crystal dimming film includes: the first flexible substrate comprises a first base material layer and a first light-transmitting conducting layer which are laminated; the second flexible substrate comprises a second light-transmitting conductive layer and a second base material layer which are laminated; the first liquid crystal layer is positioned between the first light-transmitting conductive layer and the second light-transmitting conductive layer; the first substrate layer comprises a polycarbonate material or a polymethyl methacrylate material; and/or the second substrate layer comprises a polycarbonate material or a polymethyl methacrylate material. In the dimming module provided by the embodiment of the application, the liquid crystal dimming film is made of the flexible base material, is easy to deform, has light self weight, is not easy to break and is easy to popularize; the flexible substrate is made of polycarbonate material or polymethyl methacrylate material, has a phase delay amount close to 0, and can effectively reduce the probability or degree of rainbow interference fringes which may be generated.

Description

Light modulation module, preparation method thereof and light modulation structure

Technical Field

The application relates to the technical field of liquid crystal dimming, in particular to a dimming module, a preparation method thereof and a dimming structure.

Background

The liquid crystal dimming module utilizes the change deflection of liquid crystal molecules under the action of an electric field to drive dye molecules to deflect, thereby realizing the function of light brightness adjustment. Compared with other dimming technologies, the liquid crystal dimming module has the advantages of second-order response and stepless dimming, and can be widely applied as a dimming function layer, for example, to scenes such as side windows and skylights of passenger cars.

The existing liquid crystal dimming module is usually made of glass base materials, and belongs to the technical field of rigid materials which are not easy to deform, have large self weight and are fragile, so that certain application limitation exists.

Disclosure of Invention

Aiming at the defects of the existing mode, the application provides the dimming module, the preparation method thereof and the dimming structure, and the dimming module is used for solving the technical problem that the liquid crystal dimming module made of glass substrates in the prior art is limited in certain application.

In a first aspect, an embodiment of the present application provides a dimming module, including: a first liquid crystal dimming film;

the first liquid crystal dimming film includes:

the first flexible substrate comprises a first base material layer and a first light-transmitting conducting layer which are laminated;

the second flexible substrate comprises a second light-transmitting conductive layer and a second base material layer which are laminated;

the first liquid crystal layer is positioned between the first light-transmitting conductive layer and the second light-transmitting conductive layer;

the first substrate layer comprises a polycarbonate material or a polymethyl methacrylate material; and/or the second substrate layer comprises a polycarbonate material or a polymethyl methacrylate material.

Optionally, the thickness ratio between the first substrate layer and the first light-transmitting conductive layer is not less than 1000:1 and not more than 4000: 1;

and/or the thickness ratio between the second substrate layer and the second light-transmitting conductive layer is not less than 1000:1 and not more than 4000: 1;

and/or the first liquid crystal layer comprises dye liquid crystals or polymer dispersed liquid crystals.

Optionally, the thickness of the first substrate layer is not less than 100 micrometers and not more than 200 micrometers, and the thickness of the first light-transmitting conductive layer is not less than 50 nanometers and not more than 100 nanometers;

and/or the thickness of the second substrate layer is not less than 100 microns and not more than 200 microns, and the thickness of the second light-transmitting conductive layer is not less than 50 nanometers and not more than 100 nanometers.

Optionally, the first flexible substrate further comprises: a first scratch resistant layer; the first scratch-resistant layer is positioned between the first base material layer and the first light-transmitting conductive layer;

and/or the second flexible substrate further comprises: a second scratch resistant layer; the second scratch-resistant layer is positioned between the second base material layer and the second light-transmitting conductive layer.

Optionally, if the first substrate layer comprises a polycarbonate material, the first scratch-resistant layer comprises an acrylic resin material;

if the first base material layer comprises a polymethyl methacrylate material, the first scratch-resistant layer comprises an acrylic resin material added with zirconia particles;

if the second substrate layer comprises a polycarbonate material, the second scratch-resistant layer comprises an acrylic resin material;

if the second substrate layer comprises a polymethyl methacrylate material, the second scratch-resistant layer comprises an acrylic resin material to which zirconia particles are added.

Optionally, the first flexible substrate further comprises: a first hardened layer; the first hardening layer is positioned on one side of the first base material layer far away from the first light-transmitting conductive layer;

and/or the second flexible substrate further comprises: a second hardened layer; the second hardened layer is located on one side, far away from the second light-transmitting conductive layer, of the second base material layer.

Optionally, at least one of the first hardened layer and the second hardened layer includes an acrylic resin material;

and/or the connecting layer comprises an optical glue material.

Optionally, the dimming module further comprises: a second liquid crystal dimming film and a connection layer;

the connecting layer is positioned between the first liquid crystal dimming film and the second liquid crystal dimming film;

the second liquid crystal dimming film includes at least one of a polycarbonate material and a polymethyl methacrylate material.

Optionally, a ratio of a sum of thicknesses of the first liquid crystal dimming film and the second liquid crystal dimming film to a thickness of the connection layer is not less than 1:7 and not more than 3: 1.

Optionally, the sum of the thicknesses of the first liquid crystal dimming film and the second liquid crystal dimming film is not less than 0.1 mm and not more than 0.9 mm;

and or, the thickness of the tie layer is not less than 0.3 mm and not more than 0.7 mm.

In a second aspect, an embodiment of the present application provides a dimming structure, including: a light-transmitting base, and a light-dimming module as provided in the first aspect above on at least one side of the light-transmitting base.

In a third aspect, an embodiment of the present application provides a method for manufacturing a dimming module, including:

manufacturing a first substrate layer by adopting a polycarbonate material or a polymethyl methacrylate material;

manufacturing a first light-transmitting conducting layer on one side of the first base material layer to obtain a first flexible substrate;

manufacturing a second substrate layer by adopting a polycarbonate material or a polymethyl methacrylate material;

manufacturing a second light-transmitting conductive layer on one side of the second base material layer to obtain a second flexible substrate;

and aligning the side of the first flexible substrate with the first light-transmitting conducting layer with the side of the second flexible substrate with the second light-transmitting conducting layer, and filling a first liquid crystal layer between the first flexible substrate and the second flexible substrate to obtain the first liquid crystal dimming film.

Optionally, the first substrate layer is made of a polycarbonate material or a polymethyl methacrylate material, and includes:

manufacturing a first substrate layer by adopting a polycarbonate material, and manufacturing a first anti-scraping layer on one side of the first substrate layer by adopting an acrylic resin material;

alternatively, the first base material layer is made of a polymethyl methacrylate material, and the first scratch-resistant layer is made on one side of the first base material layer with an acrylic resin material to which zirconia fine particles are added.

Optionally, the preparation method further comprises:

preparing a second liquid crystal dimming film; the second liquid crystal dimming film comprises a polycarbonate material or a polymethyl methacrylate material;

and (3) attaching the first liquid crystal dimming film and the second liquid crystal dimming film through the connecting layer to obtain the dimming module.

Optionally, attaching the first liquid crystal dimming film to the second liquid crystal dimming film through a connection layer includes:

coating liquid optical glue on one side of at least one of the first liquid crystal light adjusting film and the second liquid crystal light adjusting film;

the first liquid crystal dimming film and the second liquid crystal dimming film are attached through a liquid optical adhesive;

and applying light to the liquid optical cement to enable the liquid optical cement to be cured to form the connecting layer.

The technical scheme provided by the embodiment of the application brings beneficial technical effects that:

1. the liquid crystal dimming film is made of a flexible base material, is easy to deform, light in self weight and not easy to break, and is easy to popularize;

2. the flexible substrate is made of polycarbonate material or polymethyl methacrylate material, has a phase delay amount close to 0, and can effectively reduce the probability or degree of rainbow interference fringes which may be generated.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a first liquid crystal dimming film in a first dimming module according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of an embodiment of a first flexible substrate in a first liquid crystal dimming film according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a second implementation manner of a first flexible substrate in a first liquid crystal dimming film provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a third implementation manner of a first flexible substrate in a first liquid crystal light modulation film provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a second dimming module according to an embodiment of the present disclosure;

fig. 6 is a schematic flowchart illustrating a manufacturing method of a dimming module according to an embodiment of the present disclosure;

fig. 7 is a schematic flowchart illustrating a manufacturing method of another dimming module according to an embodiment of the present disclosure;

fig. 8 is a schematic flow chart illustrating a process of attaching a first liquid crystal dimming film and a second liquid crystal dimming film through a connection layer in another method for manufacturing a dimming module according to the embodiment of the present application.

In the figure:

10-a dimming module; 11-a first liquid crystal dimming film; 12-a tie layer; 13-a second liquid crystal dimming film;

110-a first flexible substrate; 111-a first substrate layer; 112-a first light transmissive electrically conductive layer; 113-a first scratch resistant layer; 114 — a first hardened layer;

120-a second flexible substrate; 130-first liquid crystal layer.

Detailed Description

Embodiments of the present application are described below in conjunction with the drawings in the present application. It should be understood that the embodiments set forth below in connection with the drawings are exemplary descriptions for explaining technical solutions of the embodiments of the present application, and do not limit the technical solutions of the embodiments of the present application.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of other features, information, data, steps, operations, elements, components, and/or groups thereof, that may be implemented as required by the art. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein means at least one of the items defined by the term, e.g., "a and/or B" may be implemented as "a", or as "B", or as "a and B".

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The research and development idea of the application comprises: if the glass substrate of the liquid crystal dimming module is replaced by the flexible substrate, the problem that the existing liquid crystal dimming module is not easy to deform, has heavy self weight, is fragile and causes application limitation because the existing liquid crystal dimming module is made of rigid materials such as glass substrates can be effectively solved.

Alternatively, the flexible substrate may be a PET (polyethylene terephthalate) material.

The continuous research shows that the controllable range of the transmittance of the liquid crystal dimming module is between 13% and 50% and the maximum contrast ratio of the bright state/dark state is only 3.85, which is limited by the characteristics of the liquid crystal material, and the requirements of sunshade or privacy of the passenger car are difficult to meet when the liquid crystal dimming module is used in an outdoor environment. In order to improve the controllable range of the transmittance, two layers of liquid crystal dimming modules can be overlapped to form a dual-cell liquid crystal dimming module, so that the transmittance of the dark state of the liquid crystal dimming module can be obviously reduced, and the contrast of the whole bright state/dark state of the liquid crystal dimming module is improved.

However, different from the glass substrate, because the phase retardation of the PET material is large (the phase retardation is hundreds of), the polarization state of light changes after the light passes through the PET material, and the transmittances of different wavelengths have large differences, so that the single-cell liquid crystal dimming module has a very serious rainbow interference fringe problem at a specific viewing angle after being doubly curved, and after the double-cell liquid crystal dimming module is superimposed. In terms of mechanism, the liquid crystal dimming module using the PET substrate with more than a single layer cannot avoid the occurrence of interference fringes.

The application provides a dimming module, a preparation method thereof and a dimming structure, and aims to solve the technical problems in the prior art.

The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. It should be noted that the following embodiments may be referred to, referred to or combined with each other, and the description of the same terms, similar features, similar implementation steps and the like in different embodiments is not repeated.

The embodiment of the application provides a dimming module 10, and a schematic structural diagram of the dimming module 10 is shown in fig. 1, and includes: the first liquid crystal dimming film 11.

The first liquid crystal dimming film 11 includes: a first flexible substrate 110, a second flexible substrate 120, and a first liquid crystal layer 130.

As shown in fig. 2, the first flexible substrate 110 includes a first base material layer 111 and a first light-transmitting conductive layer 112, which are laminated.

The second flexible substrate 120 includes a second light-transmitting conductive layer and a second base material layer, which are stacked, and reference may be made to the film structure of the first flexible substrate 110 shown in fig. 2.

The first liquid crystal layer 130 is located between the first light-transmitting conductive layer 112 and the second light-transmitting conductive layer.

The first substrate layer 111 includes a polycarbonate material or a polymethyl methacrylate material; and/or the second substrate layer comprises a polycarbonate material or a polymethyl methacrylate material.

In this embodiment, the first liquid crystal dimming film 11 in the dimming module 10 is made of a flexible substrate, and is easy to deform, light in self weight, not fragile, and easy to popularize. And the flexible substrate is made of polycarbonate material or polymethyl methacrylate material, has a phase delay amount close to 0, and can effectively reduce the probability or degree of rainbow interference fringes which may be generated.

The first substrate layer 111 and the second substrate layer are advantageous to help form the structure of the liquid crystal cell, and the first liquid crystal layer 130 is defined in the middle of the liquid crystal dimming film.

The first transparent conductive layer 112 and the second transparent conductive layer can form a voltage to drive the liquid crystal molecules in the first liquid crystal layer 130 to generate a desired deflection, thereby controlling the transmittance of the liquid crystal dimming film.

Alternatively, any one of the first light-transmitting conductive layer 112 and the second light-transmitting conductive layer may employ an ITO (indium tin oxide) material.

Optionally, the thickness ratio between the first substrate layer 111 and the first light-transmitting conductive layer 112 is not less than 1000:1 and not more than 4000: 1.

Optionally, the thickness of the first substrate layer 111 is not less than 100 micrometers and not more than 200 micrometers, and the thickness of the first light-transmitting conductive layer 112 is not less than 50 nanometers and not more than 100 nanometers.

Optionally, a thickness ratio between the second substrate layer and the second light-transmitting conductive layer is not less than 1000:1 and not more than 4000: 1.

Optionally, the thickness of the second substrate layer is not less than 100 micrometers and not more than 200 micrometers, and the thickness of the second light-transmitting conductive layer is not less than 50 nanometers and not more than 100 nanometers.

Alternatively, the first liquid crystal layer 130 includes a dye liquid crystal or a polymer dispersed liquid crystal.

The dye liquid crystal can be obtained by adding dye into liquid crystal, and can make the liquid crystal produce color display. The dye has enough solubility to the liquid crystal and does not have negative influence on the liquid crystal performance, the dye can keep the parallel arrangement with the orientation of liquid crystal molecules after being added into the liquid crystal, and the dye molecules can rotate in the same phase with the liquid crystal molecules under the action of an electric field. The required dye liquid crystal can be prepared by selecting dyes with different colors according to the product requirements.

Polymer Dispersed Liquid crystals, also known as pdlc (polymer Dispersed Liquid crystal) are Liquid crystals Dispersed in an organic solid polymer matrix in small droplets of micron order, which, because the optical axes of the small droplets, which are composed of Liquid crystal molecules, are in free orientation, have a refractive index that does not match the refractive index of the matrix, and are strongly scattered by the droplets as light passes through the matrix to assume an opaque milky or translucent state. Application of an electric field can adjust the optical axis orientation of the liquid crystal droplets, which when index matched, appear transparent. The electric field is removed and the liquid crystal droplets restore the original state of astigmatism, thereby performing the display.

In some possible embodiments, as shown in fig. 3, the first flexible substrate 110 further includes: a first scratch-resistant layer 113. The first scratch-resistant layer 113 is located between the first substrate layer 111 and the first light-transmitting conductive layer 112.

In this embodiment, a first scratch-resistant layer 113 is further disposed between the first base material layer 111 and the first light-transmitting conductive layer 112 in the first flexible substrate 110, so that a side of the first base material layer 111 close to the first light-transmitting conductive layer 112 can be protected to a certain extent, and the overall service life of the first flexible substrate 110 is prolonged.

The material of the first scratch-resistant layer 113 needs to be adaptively optically matched according to the material of the first substrate layer 111 to reduce optical defects such as rainbow interference fringes, and specific material matching is as follows:

in one example, if the first substrate layer 111 includes a polycarbonate material, the first scratch resistant layer 113 includes an acrylic resin material.

In another example, if the first base material layer 111 includes a polymethyl methacrylate material, the first scratch-resistant layer 113 includes an acrylic resin material to which zirconia fine particles are added. The refractive index of the first scratch-resistant layer 113 is increased with the content of the zirconia particles, so that the refractive index of the first scratch-resistant layer 113 can be adjusted by adjusting the content of the zirconia particles to match the optical characteristics of the first substrate layer 111 comprising the polymethyl methacrylate material.

Likewise, in some possible embodiments, the second flexible substrate 120 further includes: and a second scratch-resistant layer. The second scratch-resistant layer is located between the second base material layer and the second light-transmitting conductive layer, and reference may be made to the film structure of the first flexible substrate 110 shown in fig. 3.

In this embodiment, a first scratch-resistant layer 113 is further disposed between the second substrate layer and the second transparent conductive layer in the second flexible substrate 120, so that a certain protection can be formed on the side of the second substrate layer close to the second transparent conductive layer, and the overall service life of the second flexible substrate 120 is prolonged.

The material of the second scratch-resistant layer also needs to be adaptively optically matched according to the material of the second substrate layer so as to reduce optical defects such as rainbow interference fringes, and the specific material matching is as follows:

in one example, if the second substrate layer comprises a polycarbonate material, the second scratch resistant layer comprises an acrylic resin material.

In another example, if the second substrate layer comprises a polymethylmethacrylate material, the second scratch-resistant layer comprises an acrylic resin material to which zirconia particles are added.

In some possible embodiments, as shown in fig. 4, the first flexible substrate 110 further includes: a first hardened layer 114. The first hardened layer 114 is located on a side of the first substrate layer 111 away from the first light-transmitting conductive layer 112.

In this embodiment, the first scratch-resistant layer 113 is further disposed on a side of the first base material layer 111 of the first flexible substrate 110 away from the first light-transmitting conductive layer 112, so that damage to the first base material layer 111 caused by mechanical force from the outside of the liquid crystal dimming film can be reduced, and the overall service life of the first flexible substrate 110 can be prolonged.

In some possible embodiments, the second flexible substrate 120 further includes: a second hardened layer. The second hardened layer is located on a side of the second substrate layer away from the second light-transmitting conductive layer, which can refer to the film structure of the first flexible substrate 110 shown in fig. 4.

In this embodiment, a second scratch-resistant layer is further disposed on a side of the second substrate layer of the second flexible substrate 120 away from the second transparent conductive layer, so that damage to the second substrate layer from mechanical force outside the liquid crystal dimming film can be reduced, and the overall service life of the first flexible substrate 110 is prolonged.

Alternatively, at least one of the first hardened layer 114 and the second hardened layer includes an acrylic resin material.

In some possible embodiments, as shown in fig. 5, the dimming module further includes: a second liquid crystal dimming film 13 and a connection layer 12.

The connection layer 12 is located between the first liquid crystal dimming film 11 and the second liquid crystal dimming film 13.

The second liquid crystal dimming film 13 includes at least one of a polycarbonate material and a polymethyl methacrylate material.

In this embodiment, the dimming module 10 includes two layers of superimposed liquid crystal dimming films, and the superposition is realized through the connecting layer 12 between the first liquid crystal dimming film 11 and the second liquid crystal dimming film 13, so that the transmittance of the dark state of the liquid crystal dimming module 10 can be remarkably reduced, and the contrast of the whole bright state/dark state of the liquid crystal dimming module 10 is improved.

Alternatively, the connecting layer 12 may comprise an optical glue material. Special adhesive for cementing transparent optical elements (such as lenses, etc.). The optical adhesive material is colorless and transparent, has the light transmittance of more than 90 percent, has good bonding strength, can be cured at room temperature or middle temperature, has the characteristics of small curing shrinkage and the like, and is favorable for realizing the superposition between the first liquid crystal dimming film 11 and the second liquid crystal dimming film 13.

Alternatively, the second liquid crystal dimming film 13 includes: the third flexible substrate, the fourth flexible substrate and the second liquid crystal layer may refer to the film layer structure of the first flexible substrate 110 shown in fig. 1-2.

The third flexible substrate comprises a third base material layer and a third light-transmitting conducting layer which are laminated;

a fourth flexible substrate including a fourth light-transmitting conductive layer and a fourth base material layer which are laminated;

the second liquid crystal layer is positioned between the third light-transmitting conductive layer and the fourth light-transmitting conductive layer;

the third substrate layer comprises a polycarbonate material or a polymethyl methacrylate material; and/or the fourth substrate layer comprises a polycarbonate material or a polymethyl methacrylate material.

In this embodiment, the second liquid crystal dimming film 13 is also made of a flexible substrate, and is easy to deform, light in self weight, not fragile, and easy to popularize. And the flexible substrate is made of polycarbonate material or polymethyl methacrylate material, has a phase delay amount close to 0, and can effectively reduce the probability or degree of rainbow interference fringes which may be generated.

Alternatively, the liquid crystal alignment direction of the second liquid crystal layer in the second liquid crystal dimming film 13 is perpendicular to the liquid crystal alignment direction of the first liquid crystal layer 130 in the first liquid crystal dimming film 11.

Alternatively, the second liquid crystal dimming film 13 may also include at least one of a scratch-resistant layer and a hardened layer, see in particular an alternative film layer structure of the first liquid crystal dimming film 11 shown in fig. 3 and 4.

Alternatively, the ratio of the sum of the thicknesses of the first liquid crystal dimming film 11 and the second liquid crystal dimming film 13 to the thickness of the connection layer 12 is not less than 1:7 and not more than 3: 1.

Alternatively, the sum of the thicknesses of the first liquid crystal dimming film 11 and the second liquid crystal dimming film 13 is not less than 0.1 mm and not more than 0.9 mm.

Optionally, the thickness of the connection layer 12 is not less than 0.3 mm and not more than 0.7 mm.

Alternatively, the sum of the thicknesses of the laminated first liquid crystal dimming film 11, the connection layer 12, and the second liquid crystal dimming film 13 is not less than 0.8 mm and not more than 1.2 mm.

Alternatively, the thickness of any one base material layer (including at least one of the first base material layer, the second base material layer, the third base material layer, and the fourth base material layer) of the first liquid crystal dimming film 11 and the second liquid crystal dimming film 13 is not less than 100 nm and not more than 200 nm.

Adopt the rete thickness parameter that any kind of above-mentioned embodiment provided, can be favorable to adjusting luminance the module and guaranteeing under the prerequisite of light modulation performance, realize single bent or hyperbolic waiting and buckle, also be favorable to adjusting luminance the attenuate of module.

Based on the same inventive concept, the embodiment of the present application provides a light modulation structure, which includes: a light-transmitting base, and a light-adjusting module 10 disposed on at least one side of the light-transmitting base as provided in any of the above embodiments.

In this embodiment, since the dimming structure includes any one of the dimming modules 10 provided in the foregoing embodiments, the implementation principle and the beneficial effects are similar, and are not described herein again.

Wherein, the light-transmitting base can be an attached base structure of the light-adjusting module 10.

Alternatively, the light transmissive base may be a single or double curved toughened glass. Wherein, single-curved means that it can be bent in one direction; doubly curved means that it can be curved in both the x and y directions.

Alternatively, the light transmitting base may be a side window, a sunroof, a rear windshield, or the like of a passenger car.

Alternatively, the light-transmitting foundation may be a window glass of a house.

Alternatively, the light-transmitting base may also be an ophthalmic lens or the like.

Based on the same inventive concept, the embodiment of the present application provides a method for manufacturing a dimming module, a schematic flow chart of the manufacturing method is shown in fig. 6, and the method includes steps S101 to S105:

s101: the first substrate layer is made of polycarbonate material or polymethyl methacrylate material. Step S102 is then performed.

In an example, step S101 may specifically include: the first substrate layer is made of polycarbonate materials, and the first scratch-resistant layer is made of acrylic resin materials on one side of the first substrate layer.

In another example, step S101 may specifically include: the first base material layer is made of polymethyl methacrylate material, and the first scratch-resistant layer is made of acrylic resin material added with zirconia particles on one side of the first base material layer.

S102: and manufacturing a first light-transmitting conductive layer on one side of the first base material layer to obtain a first flexible substrate.

Step S105 is then performed.

Optionally, step S102 may specifically include: and depositing a first light-transmitting metal layer on one side of the first flexible substrate, and patterning the first light-transmitting metal layer to obtain a first light-transmitting conductive layer. The first light-transmitting conductive layer may be made of ITO (indium tin oxide) material.

S103: and the second substrate layer is made of polycarbonate material or polymethyl methacrylate material.

After that, step S104 is executed.

In an example, the step S103 may specifically include: and manufacturing a second flexible substrate by adopting a polycarbonate material, and manufacturing a second scratch-resistant layer on one side of the second flexible substrate by adopting an acrylic resin material.

In another example, the step S103 may specifically include: a second flexible substrate is made of polymethyl methacrylate material, and a second scratch-resistant layer is made on one side of the second flexible substrate by using acrylic resin material added with zirconia particles.

S104: and manufacturing a second light-transmitting conductive layer on one side of the second base material layer to obtain a second flexible substrate. Step S105 is then performed.

Optionally, this step S104 may specifically include: and depositing a second light-transmitting metal layer on one side of the second flexible substrate, and patterning the second light-transmitting metal layer to obtain a second light-transmitting conductive layer. The second light-transmitting conductive layer can also adopt ITO (indium tin oxide) material.

S105: and aligning the side of the first flexible substrate with the first light-transmitting conducting layer with the side of the second flexible substrate with the second light-transmitting conducting layer, and filling a first liquid crystal layer between the first flexible substrate and the second flexible substrate to obtain the first liquid crystal dimming film.

In an example, the step S105 may specifically include: the first flexible substrate and the second flexible substrate are respectively fixed by the two hard support sheets, so that the first flexible substrate and the second flexible substrate which are made of flexible materials can be unfolded and fixed, and then the first flexible substrate and the second flexible substrate are oppositely arranged and then are respectively stripped from the respective hard support sheets. Wherein, the hard supporting sheet can be stripped, organic glass, steel plate or plastic plate, etc.

In another example, the step S105 may specifically include: utilize two vacuum adsorption platforms to adsorb fixed first flexible substrate and second flexible substrate respectively, be favorable to like this to expand the first flexible substrate and the flexible substrate of second with flexible material, fixed, then with first flexible substrate and second flexible substrate after closing, remove the negative pressure of vacuum adsorption platform respectively, can take out fashioned liquid crystal membrane of adjusting luminance.

In addition, any one of the first liquid crystal light adjusting film and the second liquid crystal light adjusting film can be prepared by the method steps of steps S101 to S105.

The embodiment of the application provides another preparation method of a dimming module, and a flow chart of the preparation method is shown in fig. 7, and the preparation method comprises steps S201 to S207:

s201: the first substrate layer is made of polycarbonate material or polymethyl methacrylate material. Step S202 is then performed.

S202: and manufacturing a first light-transmitting conductive layer on one side of the first base material layer to obtain a first flexible substrate. Step S205 is then performed.

S203: and the second substrate layer is made of polycarbonate material or polymethyl methacrylate material. Step S204 is then performed.

S204: and manufacturing a second light-transmitting conductive layer on one side of the second base material layer to obtain a second flexible substrate. Step S205 is then performed.

S205: and aligning the side of the first flexible substrate with the first light-transmitting conducting layer with the side of the second flexible substrate with the second light-transmitting conducting layer, and filling a first liquid crystal layer between the first flexible substrate and the second flexible substrate to obtain the first liquid crystal dimming film. Step S207 is then performed.

S206: preparing a second liquid crystal dimming film; the second liquid crystal dimming film comprises a polycarbonate material or a polymethyl methacrylate material. Step S207 is then performed.

Optionally, this step S206 may specifically include: a third substrate layer is made of a polycarbonate material or a polymethyl methacrylate material; manufacturing a third light-transmitting conductive layer on one side of the third base material layer to obtain a third flexible substrate; manufacturing a fourth base material layer by adopting a polycarbonate material or a polymethyl methacrylate material; manufacturing a fourth light-transmitting conductive layer on one side of the fourth base material layer to obtain a fourth flexible substrate; and matching one side of the third flexible substrate, which is provided with the third light-transmitting conducting layer, with one side of the fourth flexible substrate, which is provided with the fourth light-transmitting conducting layer, and filling a second liquid crystal layer between the third flexible substrate and the fourth flexible substrate to obtain a second liquid crystal dimming film.

S207: and (3) attaching the first liquid crystal dimming film and the second liquid crystal dimming film through the connecting layer to obtain the dimming module.

In this embodiment, the dimming module prepared in steps S201 to S207 includes two stacked liquid crystal dimming films, and the first liquid crystal dimming film and the second liquid crystal dimming film are stacked via the connection layer, so that the transmittance of the dark state of the liquid crystal dimming module can be significantly reduced, and the contrast of the whole bright state/dark state of the liquid crystal dimming module can be improved.

Wherein, the liquid crystal membrane of adjusting luminance adopts flexible substrate preparation, yielding, the dead weight is lighter and not fragile, promotes more easily. And the flexible substrate is made of polycarbonate material or polymethyl methacrylate material, has a phase delay amount close to 0, and can effectively reduce the probability or degree of rainbow interference fringes possibly generated after two layers of flexible liquid crystal dimming films are superposed.

In some possible embodiments, as shown in fig. 8, the step S207 of attaching the first liquid crystal dimming film and the second liquid crystal dimming film via the connection layer includes steps S301 to S303:

s301: and coating a liquid optical adhesive on one side of at least one of the first liquid crystal light adjusting film and the second liquid crystal light adjusting film.

Optionally, this step S301 can adopt slit coating process, coats one side of at least one of first liquid crystal membrane and second liquid crystal membrane with liquid optical cement, is favorable to the homogeneity of accurate control liquid optical cement coating thickness through slit coating process, can effectively discharge the air between first liquid crystal membrane and the second liquid crystal membrane when doing benefit to follow-up laminating solidification, optimizes the optical properties of fashioned module of adjusting luminance.

S302: and the first liquid crystal light adjusting film and the second liquid crystal light adjusting film are jointed through the liquid optical glue.

Optionally, in this step S301, a rolling lamination process may be adopted to laminate the first liquid crystal dimming film and the second liquid crystal dimming film, and air between the first liquid crystal dimming film and the second liquid crystal dimming film may be effectively discharged through the rolling lamination process, so as to reduce the haze of the formed dimming module, i.e., improve the optical performance.

S303: and applying light to the liquid optical cement to enable the liquid optical cement to be cured to form the connecting layer.

By applying the embodiment of the application, at least the following beneficial effects can be realized:

1. the liquid crystal dimming film is made of flexible base materials, is easy to deform, light in self weight and not easy to break, and is easy to popularize.

3. The dimming module comprises two layers of superposed liquid crystal dimming films, superposition is realized between the first liquid crystal dimming film and the second liquid crystal dimming film through the connecting layer, the transmittance of a dark state of the liquid crystal dimming module can be obviously reduced, and the contrast of the whole bright state/dark state of the liquid crystal dimming module is improved.

Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, other steps, measures, or schemes in various operations, methods, or flows that have been discussed in this application can be alternated, altered, rearranged, broken down, combined, or deleted. Further, the steps, measures, and schemes in the various operations, methods, and flows disclosed in the present application in the prior art can also be alternated, modified, rearranged, decomposed, combined, or deleted.

In the description of the present application, the directions or positional relationships indicated by the words "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like are for convenience of description or simplicity of describing the embodiments of the present application based on the exemplary directions or positional relationships shown in the drawings, and do not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present application.

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 application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

It should be understood that, although the steps in the flowcharts of the figures are shown in sequence as indicated by the arrows, the order in which the steps are performed is not limited to the sequence indicated by the arrows. In some implementations of the embodiments of the present application, the steps in the various flows may be performed in other sequences as desired, unless explicitly stated otherwise herein. Moreover, some or all of the steps in each flowchart may include multiple sub-steps or multiple stages, depending on the actual implementation scenario. Some or all of the sub-steps or phases may be executed at the same time, or may be executed at different times in a scenario where the execution time is different, and the execution order of the sub-steps or phases may be flexibly configured according to requirements, which is not limited in the embodiment of the present application.

The foregoing is only a part of the embodiments of the present application, and it should be noted that it is within the scope of the embodiments of the present application that other similar implementation means based on the technical idea of the present application can be adopted by those skilled in the art without departing from the technical idea of the present application.

Claims

1. A light modulation module, comprising: a first liquid crystal dimming film;

the first liquid crystal dimming film includes:

2. The dimming module of claim 1, wherein the thickness ratio between the first substrate layer and the first light-transmissive conductive layer is not less than 1000:1 and not more than 4000: 1;

and/or, the first liquid crystal layer comprises dye liquid crystal or polymer dispersed liquid crystal.

3. The dimming module of claim 2, wherein the thickness of the first substrate layer is not less than 100 microns and not more than 200 microns, and the thickness of the first light-transmissive conductive layer is not less than 50 nanometers and not more than 100 nanometers;

and/or the thickness of the second substrate layer is not less than 100 micrometers and not more than 200 micrometers, and the thickness of the second light-transmitting conductive layer is not less than 50 nanometers and not more than 100 nanometers.

4. The dimming module of claim 1, wherein the first flexible substrate further comprises: a first scratch resistant layer; the first scratch-resistant layer is positioned between the first base material layer and the first light-transmitting conductive layer;

and/or the second flexible substrate further comprises: a second scratch resistant layer; the second scratch-resistant layer is positioned between the second base material layer and the second light-transmitting conducting layer.

5. The dimming module of claim 4, wherein if the first substrate layer comprises a polycarbonate material, the first scratch resistant layer comprises an acrylic resin material;

if the first substrate layer comprises a polymethyl methacrylate material, the first scratch-resistant layer comprises an acrylic resin material added with zirconia particles;

6. The dimming module of claim 1, wherein the first flexible substrate further comprises: a first hardened layer; the first hardened layer is positioned on one side, far away from the first light-transmitting conductive layer, of the first base material layer;

and/or the second flexible substrate further comprises: a second hardened layer; the second sclerosis layer is located the second substrate layer is kept away from one side of second printing opacity conducting layer.

7. The dimming module of claim 6, wherein at least one of the first hardened layer and the second hardened layer comprises an acrylic resin material.

8. The dimming module according to any one of claims 1-7, further comprising: a second liquid crystal dimming film and a connection layer;

9. The dimming module of claim 8, wherein a ratio of a sum of thicknesses of the first and second liquid crystal dimming films to a thickness of the connection layer is not less than 1:7 and not more than 3: 1;

and/or the connecting layer comprises an optical glue material.

10. The dimming module of claim 9, wherein the sum of the thicknesses of the first and second liquid crystal dimming films is not less than 0.1 mm and not more than 0.9 mm;

and/or the thickness of the connecting layer is not less than 0.3 mm and not more than 0.7 mm.

11. A dimming structure, comprising: a light-transmitting base, and a dimming module as claimed in any one of claims 1 to 8 located on at least one side of the light-transmitting base.

12. A method for manufacturing a dimming module is characterized by comprising the following steps:

manufacturing a first light-transmitting conductive layer on one side of the first base material layer to obtain a first flexible substrate;

and matching one side of the first flexible substrate with the first light-transmitting conducting layer with one side of the second flexible substrate with the second light-transmitting conducting layer, and filling a first liquid crystal layer between the first flexible substrate and the second flexible substrate to obtain the first liquid crystal dimming film.

13. The preparation method of claim 12, wherein the manufacturing the first substrate layer by using a polycarbonate material or a polymethyl methacrylate material comprises:

manufacturing a first base material layer by adopting a polycarbonate material, and manufacturing a first anti-scraping layer on one side of the first base material layer by adopting an acrylic resin material;

or, a first substrate layer is made of polymethyl methacrylate material, and a first scratch-resistant layer is made on one side of the first substrate layer by using acrylic resin material added with zirconia particles.

14. The method of any one of claims 12-13, further comprising:

and attaching the first liquid crystal dimming film and the second liquid crystal dimming film through a connecting layer to obtain the dimming module.

15. The method according to claim 14, wherein said attaching the first liquid crystal light adjusting film to the second liquid crystal light adjusting film via a connection layer comprises:

the first liquid crystal light adjusting film and the second liquid crystal light adjusting film are attached through the liquid optical adhesive;