KR20140024643A - Pdlc film with pattern and method for continuously manufacturing the same - Google Patents

Pdlc film with pattern and method for continuously manufacturing the same Download PDF

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Publication number
KR20140024643A
KR20140024643A KR1020120090888A KR20120090888A KR20140024643A KR 20140024643 A KR20140024643 A KR 20140024643A KR 1020120090888 A KR1020120090888 A KR 1020120090888A KR 20120090888 A KR20120090888 A KR 20120090888A KR 20140024643 A KR20140024643 A KR 20140024643A
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South Korea
Prior art keywords
liquid crystal
film
polymer dispersed
dispersed liquid
transparent conductive
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KR1020120090888A
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Korean (ko)
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김배인
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도레이첨단소재 주식회사
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Priority to KR1020120090888A priority Critical patent/KR20140024643A/en
Publication of KR20140024643A publication Critical patent/KR20140024643A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13471—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells

Abstract

The present invention relates to a patterned polymer dispersed liquid crystal film and a method for continuously manufacturing the same. More specifically, the present invention relates to a method for continuously manufacturing a patterned polymer dispersed liquid crystal film, and the liquid crystal film capable of: allowing a desired pattern to be glittered without a certain display so that the liquid crystal film can be used as a display for advertisement or for displaying; being manufactured in a roll to roll manner so that the liquid crystal film can be used as a large display device that cannot be realized by a general display; and substituting for a display device with a high price. The patterned polymer dispersed liquid crystal film according to an embodiment of the present invention comprises: a polymer dispersed liquid crystal complex film which has a plurality of liquid crystal drops (40) dispersed in a polymer dispersed liquid (30); substrates (11, 21) which are installed in the upper and lower surfaces of the polymer dispersed liquid crystal complex film; and a transparent conductive film which has conductive materials (12, 22) deposited on the substrates, wherein one conductive material (22) of the transparent conductive film has an etching part (22b). [Reference numerals] (70) Control part

Description

Patterned polymer dispersed liquid crystal film and its continuous manufacturing method {PDLC FILM WITH PATTERN AND METHOD FOR CONTINUOUSLY MANUFACTURING THE SAME}

The present invention relates to a patterned polymer dispersed liquid crystal film and a continuous manufacturing method thereof, and more specifically, it is possible to make a desired pattern shiny without a specific display, and thus it can be applied as an advertisement or a display for display, and roll to roll (ROLL TO The present invention relates to a patterned polymer dispersed liquid crystal film and a continuous manufacturing method thereof, which can be manufactured by a ROLL) method, which can be used as a large display device that cannot be implemented in a general display, and which can replace an expensive display device.

In general, a polymer dispersed liquid crystal composite film, which is a polymer dispersed liquid crystal display, is a display device that displays information in the form of scattering or transmission in response to a voltage applied from the outside of fine liquid crystal droplets dispersed in a matrix of a polymer material.

The polymer dispersed liquid crystal composite film is a novel light switching mode based on light scattering, which can exhibit a liquid crystal function in a flexible film as compared with a conventional liquid crystal display device, and does not require a polarizing plate. Therefore, it is attracting attention as a new display material because it is possible to develop a function that could not be realized by liquid crystal alone, such as dramatically improving light utilization efficiency and enabling large area.

As a related art of the PDLC film, a polyurethane precursor is prepared by appropriately adjusting a specific hydroxy compound and an isocyanate compound in the "holographic polymer dispersed liquid crystal composite film using a polyurethane precursor" of Korean Patent Laid-Open Publication No. 2004-0043230. And, when used in the holographic polymer dispersed liquid crystal composite film, high functional holographic polymer dispersed liquid crystal composite film with high efficiency, low driving voltage and low shrinkage is controlled by controlling phase separation and interaction with the liquid crystal by controlling the structure of the polymer matrix. It is disclosed that it can be produced.

The liquid crystal molecules and the polymer in the polymer dispersed liquid crystal composite device generate phase separation to form small liquid crystal droplets between the polymer matrices. As shown in FIG. 1A, the liquid crystal molecules in the liquid crystal droplets do not have a voltage applied thereto. Arranged in an arbitrary direction, a difference is generated between the effective refractive index of the liquid crystal droplet and the refractive index of the polymer, and as a result, the incident light is opaquely scattered, and when a voltage is applied, as shown in FIG. The molecules are aligned in one direction and become the same as the refractive index of the polymer. As a result, the incident light is transparently transmitted through the specimen. In the polymer dispersed liquid crystal composite film, the light is transmitted and scattered according to the presence or absence of voltage. The display is driven.

2A and 2B are cross-sectional views illustrating the structure of a polymer dispersed liquid crystal (PDLC) film, respectively, in which FIG. 2A is a case in which a driving voltage Vd is not applied to a PDLC film and FIG. 2B is a driving voltage in a PDLC film. (Vd) is applied. 2A and 2B, the principle of PDLC utilizes anisotropy of liquid crystal. Liquid crystals show anisotropy of phase and abnormal refractive indices, while general polymers show isotropy. In the case of an electroless field, the dispersed liquid crystal has a non-uniform orientation of molecules, resulting in a difference between the refractive index of the polymer and the refractive index of the liquid crystal droplet. For this reason, scattering occurs between the polymer and the liquid crystal, which causes the PDLC film to appear opaque. However, in the case of an electric field, the liquid crystal molecules are oriented in a direction parallel to the electric field, and the refractive index of the polymer and the phase refractive index of the liquid crystal are coincident so that the PDLC film becomes transparent.

The PDLC film uses the difference in refractive index between the liquid crystal and the general polymer material to visually recognize the transparency and opacity by applying the electric field. In order to maintain the electric field on the liquid crystal, the liquid crystal is coated with the polymer inside the double-sided conductive material. And harden so that the electric field can be maintained. In general, the polymer dispersed liquid crystal film is applied by applying a positive charge to one surface of a conductive material and applying a negative charge to one surface of another conductive material to maintain an electric field in the liquid crystal so that the liquid crystal is aligned in a predetermined direction. The liquid crystal film appears transparent and then appears opaque. In this case, the entire surface of the film is repeated the same transparent or opaque.

However, many studies are still required to use the PDLC film for various purposes.

Korean Laid-Open Patent Publication No. 2004-0043230

The present invention has been made to solve the above problems and to meet the required situation, the object of the present invention is that the patterned polymer dispersed liquid crystal film can make the desired pattern shiny without a specific display for advertising or display display It can be applied as a roll-to-roll method, and can be used as a large display device that cannot be realized in a general display, and has a patterned polymer dispersed liquid crystal film that can replace an expensive display device. It is to provide.

In addition, another object of the present invention is to be able to continuously produce a patterned polymer dispersed liquid crystal film can be mass-produced in large quantities, and to simplify the process and excellent coating quality and environmental pollution problem of the patterned polymer dispersed liquid crystal film It is to provide a continuous manufacturing method.

These and other objects and advantages of the present invention will become more apparent from the following description of a preferred embodiment thereof.

The patterned polymer dispersed liquid crystal film according to the embodiment of the present invention for solving the above problems has a polymer dispersed liquid crystal composite film in which a plurality of liquid crystal droplets are dispersed in a polymer dispersion and an upper and lower surfaces of the polymer dispersed liquid crystal composite film, respectively. It includes a transparent conductive film having a substrate and a conductive material deposited on the substrate, one of the transparent conductive film is characterized in that it comprises an etching portion.

According to an aspect of the embodiment, the etching portion is made of letters, pictures or other patterns.

According to one aspect of the embodiment, the polymer dispersion is 0.1% to 20% by weight of polyfunctional oligomer, 0.1% to 99% by weight of diluent, 0.1% to 99% by weight of crosslinking agent and 0.1% to 99% by weight of photoinitiator. It is to include.

According to one aspect of the embodiment, the diluent and the crosslinking agent have a composition ratio of 30: 1 to 99: 1.

According to one aspect of the embodiment, the multifunctional oligomer is a urethane-based methacrylate derivative compound induced by hydroxypropyl methacrylate, the diluent is 2- (2-ethoxyethoxy) ethyl acrylate, The crosslinking agent is at least one selected from 1,6-hexanediol diacrylate and polyethylene glycol dimethacrylate, and the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-propan-1-one.

According to one aspect of the embodiment, the polymer dispersed liquid crystal composite film has a thickness of 5-30 micrometers (μm).

The continuous manufacturing method of the patterned polymer dispersed liquid crystal film according to another embodiment of the present invention for solving the above problems is an upper winder (unwinder) and a winder (winder) and lower winder (unwinder) and Loading a transparent conductive film on which a roll-shaped conductive material is deposited on a winder, driving the loaded transparent conductive film, and the transparent conductive film from the lower plate unwinder. Etching the desired portion on the running surface of the scanner and the laser for etching and coating the PDLC crude liquid on the etched transparent conductive film and the transparent conductive film coated with the PDLC liquid and the top plate unwine Laminating the transparent conductive film from the film, curing the laminated PDLC film, and winding up the cured PDLC film. Characterized in that.

According to an aspect of the embodiment, the loaded transparent conductive film is a transparent conductive film on which a conductive material such as ITO or IZO is deposited and is loaded facing each other.

According to an aspect of the embodiment, the PDLC crude liquid is a polymer dispersed liquid crystal composite membrane crude liquid in which a plurality of liquid crystal droplets 40 are dispersed in the polymer dispersion liquid 30.

According to one aspect of the embodiment, the polymer dispersion 30 is 0.1% to 20% by weight of polyfunctional oligomer, 0.1% to 99% by weight of diluent, 0.1% to 99% by weight of crosslinking agent and 0.1% to 99% of photoinitiator. Wt%, wherein the multifunctional oligomer is a urethane-based methacrylate derivative compound derived from hydroxypropylmethacrylate, the diluent is 2- (2-ethoxyethoxy) ethyl acrylate, and the crosslinking agent At least one selected from 1,6-hexanediol diacrylate and polyethylene glycol dimethacrylate, wherein the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-propan-1-one.

According to one aspect of the embodiment, the steps are all in one continuous process.

According to the present invention, it is possible to make the desired pattern shiny without a specific display can be applied as an advertisement or display display, and can be manufactured in a roll-to-roll (roll to roll) method as a large display device that can not be implemented in a general display It can be utilized, and it is possible to replace an expensive display device.

In addition, according to the present invention, it is possible to continuously produce a patterned polymer dispersed liquid crystal film can be mass-produced in a large amount, there is an effect such as simplifying the process and excellent coating quality and environmental pollution problems can be solved.

1 is a view for explaining the present invention showing the state of light transmission and scattering according to the presence or absence of the voltage of the polymer dispersed liquid crystal composite film, Figure 1a shows a state in which no voltage is applied, Figure 1b is a state in which voltage is applied Respectively.
2A and 2B are cross-sectional views illustrating the structure of a polymer dispersed liquid crystal (PDLC) film, respectively, in which FIG. 2A is a case in which a driving voltage Vd is not applied to a PDLC film and FIG. 2B is a driving voltage Vd in a PDLC film. ) Is approved.
3 is a cross-sectional view of a patterned polymer dispersed liquid crystal film according to an embodiment of the present invention.
4 is a plan view illustrating an etching portion in which the conductive material is etched in FIG. 3.
Figure 5 is a schematic diagram of a process equipment for continuously producing a patterned polymer dispersed liquid crystal film according to an embodiment of the present invention.
6 is a view showing a process equipment for continuously producing a patterned polymer dispersed liquid crystal film according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The terms used are terms selected in consideration of functions in the embodiments, and the meaning of the terms may vary depending on the intention or custom of the user or operator. Therefore, the meaning of the terms used in the following embodiments is defined according to the definition when specifically defined in this specification, and unless otherwise defined, it should be interpreted in a sense generally recognized by those skilled in the art.

The patterned polymer dispersed liquid crystal film according to the present invention imparts a specific patterning function to the polymer dispersed liquid crystal film (PDLC film), so that a specific pattern patterned according to the presence or absence of voltage applied to the PDLC film can be turned on / off PDLC film It is about.

3 is a cross-sectional view of a patterned polymer dispersed liquid crystal film according to an exemplary embodiment of the present invention, and illustrates a case in which a driving voltage Vd is not applied. Referring to FIG. 3, the patterned polymer dispersed liquid crystal film according to the present invention has a polymer dispersed liquid crystal composite film in which a plurality of liquid crystal drops 40 are dispersed in a polymer dispersion 30 and an upper and lower surfaces of the polymer dispersed liquid crystal composite film. And a transparent conductive film having substrates 11 and 21 installed on the substrate and conductive materials 12 and 22 deposited on the substrate, wherein one conductive material 22 of the transparent conductive film is an etching portion 22b. It is characterized by comprising:

A transparent conductive film having substrates 11 and 21 and upper and lower surfaces of the polymer dispersed liquid crystal composite film and conductive materials 12 and 22 deposited on the substrate, respectively, includes a plurality of liquid crystal droplets 40 in the polymer dispersion 30. ) Is for applying an electric field to a polymer dispersed liquid crystal composite film in which?) Is dispersed. To this end, the transparent conductive film is connected to a power supply unit 60 for applying a predetermined driving voltage (Vd), the on / off operation of the power supply unit 60 is controlled by the controller 70 Can be. For example, the controller 70 may control the operation of the power supply unit 60 by receiving a signal from the user.

As described above, when the driving voltage Vd is not applied to the transparent conductive film by the power supply unit 60, the dispersed liquid crystal 40 does not have a constant orientation of molecules, and thus the refractive index of the polymer dispersion 30 and the liquid crystal ( The difference in the refractive index of 40) is obtained (see FIG. 2A). On the other hand, when the driving voltage Vd is applied by the power supply unit 60, the liquid crystal 40 aligns molecules in a direction parallel to the electric field, and the refractive index of the polymer dispersion 30 and the refractive index of the liquid crystal 40 coincide. (See FIG. 2B).

The patterned polymer dispersed liquid crystal film according to the present invention having such a structure engraves a specific pattern and repeats the transparency and opacity according to whether the pattern is applied to an electric field. That is, the etching part 22b illustrated in FIG. 4 is composed of letters, pictures, or other patterns, and one transparent conductive film has a conductive material 22 deposited thereon in a desired pattern using laser equipment or chemical etching equipment. Etching portion 22b and non-etching portion 22a, which are etched portions, are provided, and conductive material 12 deposited on another transparent conductive film is not etched.

In this configuration, when an electric field is applied to the polymer dispersed liquid crystal film by applying positive charge to the transparent conductive film having the etching portion 22b and applying negative charge to the transparent conductive film having no etching portion. Since the conductive material does not exist in the etching part 22b having the pattern where the conductive material is etched, it is recognized as opaque because no electric field is applied, and the non-etching part 22a is not etched so that the conductive material exists. As the electric field is applied and recognized transparently, the specific pattern forming the etching part is repeated transparent and opaque so that the desired pattern can be displayed in a shiny manner without the specific display desired, and thus it can be applied as an advertisement or a display for display.

In addition, the polymer dispersion 30 according to the present invention is 0.1 wt% to 20 wt% of the multifunctional oligomer, 0.1 wt% to 99 wt% of the diluent, 0.1 wt% to 99 wt% of the crosslinking agent, and 0.1 wt% to 99 wt% of the photoinitiator. It is characterized by including. Preferably, the diluent and the crosslinking agent of the polymer dispersion 30 have a composition ratio of 30: 1 to 99: 1.

This means that in the composition of the polymer dispersion 30 according to the present invention, if the content of each component is not blended at a predetermined ratio as described above, the driving voltage is increased due to the deterioration of the characteristics of the support of the liquid crystal composite film and the contrast ratio is lowered to the display. It is not desirable because it becomes difficult to implement. In particular, when the ratio of the diluent and the crosslinking agent is less than 30: 1, since the content of the diluent is too low as compared with the crosslinking agent, the driving voltage increases, which is not preferable.

In addition, the polyfunctional oligomer of the polymer dispersion 30 is a urethane-based methacrylate derivative compound induced by hydroxypropyl methacrylate, the diluent is 2- (2-ethoxyethoxy) ethyl acrylate, The crosslinking agent is at least one selected from 1,6-hexanediol diacrylate and polyethylene glycol dimethacrylate, and the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-propan-1-one. It was confirmed through various experiments that the present invention is the most desirable to achieve the object.

In addition, in order to satisfy the constant transmittance of the patterned polymer dispersed liquid crystal film according to the present invention, it is important to control the thickness of the liquid crystal layers 30 and 40 which are polymer dispersed liquid crystal composite films to a predetermined thickness or less. It is preferable that the thickness of the said polymer dispersed liquid crystal composite film is 5-30 micrometers (micrometer).

Next, a continuous method of manufacturing a patterned polymer dispersed liquid crystal film according to the present invention will be described in detail with reference to FIGS. 5 and 6.

5 is a schematic diagram of a process equipment for continuously manufacturing a patterned polymer dispersed liquid crystal film according to an embodiment of the present invention, Figure 6 is a continuous patterned polymer dispersed liquid crystal film according to an embodiment of the present invention It is a figure which shows the process equipment to manufacture. As can be seen in Figures 5 and 6, the process equipment used in the present invention is a transparent conductive film 300, the conductive material loaded on the winder 200 and two unwinders 100, 160, respectively, are deposited. The etching laser 400 and PDLC crude liquid coater 500 are positioned thereon. In addition, a scanner (not shown) is provided to instruct the etching laser 400 to be etched, and the directed etching laser performs etching while moving a laser path, that is, moving back, front, left, and right. Therefore, the transparent conductive film 300 having the conductive material deposited thereon may be etched in a desired shape or in a desired direction while the etching laser 400 is moved while the conductive conductive film 300 is being wound or unwinded.

By using the above-described apparatus, the continuous method for producing a patterned polymer dispersed liquid crystal film according to the present invention is performed by patterning with a laser while continuously moving a film in a roll state, and then applying a polymer dispersed liquid crystal layer to form a patterned polymer. A dispersion liquid crystal film is prepared. Here, a pattern is formed on the conductive material by using the laser 400 for etching on the moved or stationary transparent conductive film 300, and the crude liquid coater 500 is used on the transparent conductive film on which the pattern is formed by the etching. After applying the polymer dispersed liquid crystal solution is subjected to the step of lamination, curing and winding continuously.

Hereinafter, a method of continuously manufacturing a patterned polymer dispersed liquid crystal film according to an exemplary embodiment of the present invention will be described in detail.

Continuous manufacturing method of the patterned polymer dispersed liquid crystal film according to the present invention is the upper plate unwinder 160 and the winder 200 and the lower plate unwinder 100 and the winder 200 in the form of a roll (roll) Loading the transparent conductive films 300 and 310 on which the conductive material is deposited; driving the loaded transparent conductive films 300 and 310; and the transparent conductive film from the lower plate unwinder. Etching the desired portion on the running surface of the 300 through the scanner and the laser 400 for etching and coating the PDLC crude solution on the etched transparent conductive film and the transparent conductive coating coated with PDDL crude liquid Laminating the film and the transparent conductive film from the upper unwinder, curing the laminated PDLC film, and winding the cured PDLC film.

In the present invention, the above steps are all characterized in that it consists of one continuous process.

First, a continuous method of manufacturing a patterned polymer dispersed liquid crystal film according to the present invention is a roll on the upper plate unwinder 160 and the winder 200 and the lower plate unwinder 100 and the winder 200. Loading the transparent conductive films 300 and 310 (also referred to as " fabric films ") on which the conductive material of the present invention is deposited. Go through. Through this, the present invention can be processed by a continuous roll-to-roll (ROLL-TO-ROLL) method. In addition, the loaded transparent conductive films 300 and 310 may be loaded facing each other as a transparent conductive film on which conductive materials such as ITO or IZO are deposited.

Preferably, the transparent conductive films 300 and 310 may be transferred in one direction by the upper plate unwinder 160, the lower plate unwinder 100, and the winder 200.

Next, the desired portion on the running surface of the transparent conductive film 300 from the lower plate unwinder 100 is etched through a scanner and an etching laser 400. Through the scanner, the etching laser is instructed and the portion to be etched is directed along the laser path, i.e., the etching laser is longitudinally and laterally on the running surface of the transparent conductive film desired through the scanner. It is possible to etch the conductive material layer of the transparent conductive film while moving or stopping. In addition, the etching laser 400 may instruct a job by inputting a desired pattern as a CAD file. On the other hand, when the same pattern is required for each section, it can be produced by repeating the traveling and stopping of the disc at regular intervals by using a server motor mounted on the winder 200.

Next, the PDLC crude liquid is coated on the etched transparent conductive film 300, and may be coated through the PDLC crude liquid coater 500. Preferably, the coating thickness of PDLC crude liquid of the PDLC crude liquid is coated is 5 ~ 100㎛. The PDLC crude liquid is a polymer dispersed liquid crystal composite membrane crude liquid in which a plurality of liquid crystal droplets 40 are dispersed in the polymer dispersion liquid 30.

Next, the transparent conductive film (that is, the transparent conductive film from the lower plate unwinder) 300 and the transparent conductive film 310 from the upper plate unwinder 160 are coated with the ladle 600. By going through the step of laminating through can be obtained PD C film 110 is laminated. By using the laminator 600, the thickness can be adjusted to a predetermined thickness layer.

Next, the laminated PD film 110 undergoes a curing step in an ultraviolet curing zone including an ultraviolet lamp 700, and finally a patterned polymer dispersed liquid crystal film according to the present invention is manufactured and winder ( By winding through 200), a patterned polymer dispersed liquid crystal film in a roll state is obtained. That is, the above-mentioned steps are all made of a continuous process, and through this, it is possible to continuously obtain a patterned polymer dispersed liquid crystal film in a roll state in which only an arbitrarily applied pattern portion is switched.

By carrying out the continuous manufacturing method of the patterned polymer dispersed liquid crystal film according to the present invention, since the large-area flexible substrate is continuously supplied and the pattern etching process is performed continuously, the patterned polymer dispersed liquid crystal film is continuously fed at high speed. It can produce mass effect.

In addition, the present invention can selectively switch only a special part of the PDL film (switching) can be infinitely extended to the existing display, smart window, such as the application of the pattern decoration, luxury interior. In addition, the process of pattern PD C film can be drastically reduced, and the process quality is greatly improved by simplifying the process and relatively damaging the fabric film compared to wet etching through conventional chemicals, and solving the environmental pollution problem. Can be.

In addition, the continuous manufacturing method of the patterned polymer dispersed liquid crystal film according to the present invention can improve the precision of the produced product by enabling the etching of letters, pictures, special patterns in the roll state, and also continuous roll-to-roll It can be manufactured by (ROLL-TO-ROLL) method and can be manufactured in large size up to 1200 mm X 3000 mm. It can be used as a large display device that can not be realized in general display and its processing productivity is improved. It is very high, and it can be seen that the method can be applied in a variety of applications, especially in many fields that require patterned wet and dry coatings.

In addition, it is possible to display non-operation screens or operation screens with special forms of letters or pictures that anyone wants to display, which can replace expensive display devices, and can be utilized as large-sized display devices that cannot be represented by current technology. It may be possible.

11, 21: substrate 12, 22: conductive material
22a: non-etching portion 22b: etching portion
30: polymer dispersion 40: liquid crystal droplets
50: adhesive layer 60: power supply
70 control unit 100 lower plate unwinder
110: laminated PD CD film 160: the upper wind (unwinder)
200: winder 300, 310: transparent conductive film
400: laser for etching 410: laser support shaft for etching
500: PDLC crude liquid coater 600: laminator
700: UV Lamp

Claims (11)

The polymer dispersed liquid crystal composite film in which the plurality of liquid crystal droplets 40 are dispersed in the polymer dispersion liquid 30, and the substrates 11 and 21 respectively provided on the upper and lower surfaces of the polymer dispersed liquid crystal composite film and the conductivity deposited on the substrate. Including a transparent conductive film having a material (12, 22),
One conductive material (22) of the transparent conductive film is characterized in that it comprises an etching portion (22b), patterned polymer dispersed liquid crystal film. The method of claim 1,
The etching portion (22b) is characterized in that consisting of letters, pictures or other patterns, patterned polymer dispersed liquid crystal film. The method of claim 1,
The polymer dispersion 30 is characterized in that it comprises 0.1% to 20% by weight of polyfunctional oligomer, 0.1% to 99% by weight of diluent, 0.1% to 99% by weight of crosslinking agent and 0.1% to 99% by weight of photoinitiator. A polymer dispersed liquid crystal film having a pattern formed thereon. The method of claim 3,
The diluent and the crosslinking agent have a composition ratio of 30: 1 to 99: 1, wherein the patterned polymer dispersed liquid crystal film. The method of claim 3,
The polyfunctional oligomer is a urethane-based methacrylate derivative compound derived from hydroxypropyl methacrylate, the diluent is 2- (2-ethoxyethoxy) ethyl acrylate, and the crosslinking agent is 1,6-hexanediol At least one selected from diacrylate and polyethylene glycol dimethacrylate, and the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-propane-1-one. film. The method according to any one of claims 1 to 5,
The thickness of the polymer dispersed liquid crystal composite film is a patterned polymer dispersed liquid crystal film, characterized in that 5-30 micrometers (㎛). In the continuous method for producing a patterned polymer dispersed liquid crystal film,
Loading a transparent conductive film having a roll-shaped conductive material deposited on an upper winder and a winder and a lower winder and a winder; ;
Driving the loaded transparent conductive film;
Etching through a scanner and an etching laser to a desired portion on the running surface of the transparent conductive film from the bottom unwinder;
Coating PDLC crude liquid on the etched transparent conductive film;
Laminating the transparent conductive film coated with the PDLC crude liquid and the transparent conductive film from the upper plate unwinder;
Curing the laminated PDLC film;
And winding up the cured PDC film. 8. The method of claim 7,
The loaded transparent conductive film is a transparent conductive film on which conductive materials such as ITO or IZO are deposited, and are loaded facing each other, characterized in that the continuous manufacturing method of the patterned polymer dispersed liquid crystal film. 8. The method of claim 7,
Said PDLC crude liquid is a polymer dispersed liquid crystal composite membrane crude liquid in which a plurality of liquid crystal droplets 40 are dispersed in a polymer dispersion 30, characterized in that the continuous manufacturing method of the patterned polymer dispersed liquid crystal film. 10. The method of claim 9,
The polymer dispersion 30 includes 0.1 wt% to 20 wt% of the multifunctional oligomer, 0.1 wt% to 99 wt% of the diluent, 0.1 wt% to 99 wt% of the crosslinking agent, and 0.1 wt% to 99 wt% of the photoinitiator. The functional oligomer is a urethane-based methacrylate derivative compound derived from hydroxypropyl methacrylate, the diluent is 2- (2-ethoxyethoxy) ethyl acrylate, and the crosslinking agent is 1,6-hexanediol diacryl. At least one selected from the group consisting of acrylate and polyethylene glycol dimethacrylate, and the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-propane-1-one. Continuous manufacturing process. 10. The method according to any one of claims 7 to 9,
The above steps are all made in one continuous process, a continuous method for producing a patterned polymer dispersed liquid crystal film.
KR1020120090888A 2012-08-20 2012-08-20 Pdlc film with pattern and method for continuously manufacturing the same KR20140024643A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105717734A (en) * 2014-08-13 2016-06-29 南京晶多新材料科技有限公司 Structure and application of scattering polarized glass transparent projection screen
CN106154616A (en) * 2015-04-01 2016-11-23 正达国际光电股份有限公司 Liquid crystal film splicing construction and apply its dimming glass, device
WO2017140827A1 (en) 2016-02-19 2017-08-24 Intercomet, S.L. Pdlc film device with patterned electrodes
KR20180080849A (en) * 2017-01-05 2018-07-13 재단법인 구미전자정보기술원 Apparatus and method for manufacturing smart window film
CN108415183A (en) * 2018-02-12 2018-08-17 郴州市晶讯光电有限公司 The production method and electronics curtain of electronics curtain
WO2021107196A1 (en) * 2019-11-28 2021-06-03 (주)성일이노텍 Uv curing method and apparatus for pdlc glass

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105717734A (en) * 2014-08-13 2016-06-29 南京晶多新材料科技有限公司 Structure and application of scattering polarized glass transparent projection screen
CN106154616A (en) * 2015-04-01 2016-11-23 正达国际光电股份有限公司 Liquid crystal film splicing construction and apply its dimming glass, device
CN106154616B (en) * 2015-04-01 2019-03-26 正达国际光电股份有限公司 Liquid crystal film splicing construction and dimming glass, the device for applying it
WO2017140827A1 (en) 2016-02-19 2017-08-24 Intercomet, S.L. Pdlc film device with patterned electrodes
KR20180080849A (en) * 2017-01-05 2018-07-13 재단법인 구미전자정보기술원 Apparatus and method for manufacturing smart window film
CN108415183A (en) * 2018-02-12 2018-08-17 郴州市晶讯光电有限公司 The production method and electronics curtain of electronics curtain
WO2021107196A1 (en) * 2019-11-28 2021-06-03 (주)성일이노텍 Uv curing method and apparatus for pdlc glass

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