CN109358445A - A kind of reversed light modulation film and preparation method - Google Patents
A kind of reversed light modulation film and preparation method Download PDFInfo
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- CN109358445A CN109358445A CN201811506441.3A CN201811506441A CN109358445A CN 109358445 A CN109358445 A CN 109358445A CN 201811506441 A CN201811506441 A CN 201811506441A CN 109358445 A CN109358445 A CN 109358445A
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- 239000010408 film Substances 0.000 claims description 85
- 239000004973 liquid crystal related substance Substances 0.000 claims description 32
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- 229920001940 conductive polymer Polymers 0.000 claims description 4
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Classifications
-
- 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
-
- 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
- G02F1/133305—Flexible substrates, e.g. plastics, organic film
-
- 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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
-
- 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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
-
- 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
- G02F1/13347—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals working in reverse mode, i.e. clear in the off-state and scattering in the on-state
-
- 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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13712—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering the liquid crystal having negative dielectric anisotropy
Abstract
The present invention relates to a kind of reversed light modulation film and preparation methods, there is the flexible transparent conducting film of conductive layer including surface, adhere to both alignment layers on the conductive layer of flexible transparent conducting film, and both alignment layers are homeotropic alignment layer, transparent interlayer is collectively formed in flexible transparent conducting film and both alignment layers, further include the polymer dispersed liquid crystal layer formed by polymer dispersed liquid crystals, is bonded with the both alignment layers of interlayer on upper and lower two surface of polymer dispersed liquid crystal layer.The invention utilizes the orientation power of both alignment layers by the way that polymer dispersed liquid crystal layer to be bonded between two both alignment layers, it can be ensured that its energization frosted powers off transparent；The invention simultaneously is flexible structure, transport easy to produce；It is also equipped with the strong feature of cohesive force simultaneously.
Description
Technical field
The present invention relates to light modulation technical field of membrane, in particular to a kind of reversed light modulation films.
Background technique
Light modulation film also known as polymer dispersed liquid-crystal film are a kind of new type functional optoelectronic films, by applying voltage,
It can change between transparent with non-transparent state (visual effect close to ground glass), transparency is adjusted by voltage.
Currently, existing overwhelming majority light modulation film is all " be powered transparent, power-off frosted ", need to be adjusted to pellucidity
When, it is necessary to it is powered, and usual in use, the most of the time is to need its transparent state, only in some circumstances
Frosted state can be switched to, progress shading is also desirable to so many people worry that large area is too big using possible power consumption for a long time
There is a kind of light modulation film of not power consumption in the clear state.
Relatively positive light modulation film, reversed light modulation film are not required to power consumption when transparent, power off transparent, energization frosted, using more closing
Reason, can be widely applied to building doors and windows, building curtain wall and the vehicles, and existing reversed light modulation film be guarantee transparent effect and
Wide viewing angle, polymer content is very low in polymer dispersed liquid crystals, or even close to 5%, this makes the viscous of flexible inverted light modulation film
It is poor to tie power, and powers off frosted state shielding deficiency, in addition existing reversed dimming glass mostly uses polymer network liquid crystal mode,
This mode is difficult for product to be made into flexible, and the production efficiency of reversed dimming glass product is relatively low, application flexibility
It is relatively poor.Against the above deficiency, the present invention provides a kind of reversed light modulation film, by matching both alignment layers, negative liquid crystal and polymerize
The performance of object, and the ratio of polymer is properly increased, the thickness of polymer dispersed liquid crystal layer (PDLC layer) is reduced, its cohesive force is made
By force, power-off transparency is high, and energization frosted state shielding is good, while entire product is flexible, and is able to achieve roll-to-roll volume production, just
In production and transportation.
Summary of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of reversed light modulation film, cohesive force is strong, and is powered
Frosted state shielding is good, while entire product is flexible, and is able to achieve roll-to-roll volume production.
The technical scheme adopted by the invention is as follows:
A kind of reversed light modulation film has the flexible transparent conducting film of conductive layer including surface, in flexible transparent conducting film
Adhere to both alignment layers on conductive layer, and the both alignment layers are homeotropic alignment layer, flexible transparent conducting film and both alignment layers are collectively formed transparent
Interlayer, reversed light modulation film further includes the polymer dispersed liquid crystal layer formed by polymer dispersed liquid crystals, in polymer dispersion liquid
Upper and lower two surface of crystal layer is bonded with the both alignment layers of interlayer, so that entire reversed light modulation film forms sandwich structure, and is ensured
When being not powered on, under the action of two homeotropic alignment layers, the perpendicular arranged distribution of liquid crystal, so that entire reversed light modulation film is transparent
Shape, and transparency is high, and when being powered, due to the effect of electric field, liquid crystal is arranged in nearly horizontal line, so that reversed light modulation film is in mill
Sand shape, and mist degree is big, screening effect is good；Both alignment layers can obstruct external substance and be mixed into polymer dispersed liquid crystal layer simultaneously, be very
Good barrier layer, and insulating properties is also fine.
More preferably, flexible transparent conducting film includes PET basement membrane, and conductive layer is equipped on PET basement membrane, and conductive layer is that ITO is thin
Film, ZTO film, conductive polymer layer, nano-silver conductive layer, any one in graphene conductive layer.
More preferably, the surface of both alignment layers includes liquid crystal orientation film, it is ensured that is distributed in the liquid crystal between two both alignment layers disconnected
Perpendicular arranged distribution when electric；The material of both alignment layers is organic polymer film or is inorganic insulation film, and organic polymer is thin
Film is polyimides, nylon, polyvinyl alcohol, polyureas, polyamide, and inorganic insulation film is silica, silicon nitride, titanium dioxide
In any one, select a kind of material of any of the above to form homeotropic alignment layer, can make the negative liquid crystal to be in when power is off
Plumbness, to realize that power-off is transparent.In addition the low temperature alignment liquid that the both alignment layers use overcomes traditional both alignment layers and needs height
Temperature may not apply to the defect of flexible PET film.
More preferably, polymer dispersed liquid crystals, pair of polymer dispersed liquid crystals are obtained using negative liquid crystal, UV glue and microballon
Refraction value is 0.12-0.25, no 1.5-1.53, preferably ensures energization frosted, is powered off transparent.
More preferably, polymer dispersed liquid crystal layer with a thickness of 3-15 μm, and in order to increase the cohesive force of reversed light modulation film,
Suitably increase the content of polymer in polymer dispersed liquid crystals in the invention, the ratio control of negative liquid crystal and UV glue is 90:
Within 10-70:30, so that the cohesive force of polymer dispersed liquid crystal layer and both alignment layers is bigger, structure is more stable, while anti-in order to make
When power is off to light modulation film, transparent state is still good, then by the thickness control of polymer dispersed liquid crystal layer at 3-15 μm,
More optimizedly make its control at 6 μm or less.
More preferably, when being not powered on, under the action of two homeotropic alignment layers, the liquid crystal in polymer dispersed liquid crystal layer is in vertical
In line column distribution, negative liquid crystal is consistent with the refractive index of UV glue, is transparent；When energization, under the action of electric field, polymer
Liquid crystal in dispersing liquid crystal layer is in nearly horizontally arranged distribution, and the refractive index of negative liquid crystal and UV glue is inconsistent, is in frosted shape.
More preferably, both alignment layers with a thickness of 5-300nm, can guarantee that both alignment layers have enough orientation power to liquid crystal, it is ensured that disconnected
When electric, the perpendicular arrangement of liquid crystal, while the electric conductivity of conductive layer will not be influenced.
More preferably, both alignment layers with a thickness of 10-100nm, preferably guarantee both alignment layers to liquid crystal have enough orientation power and
The electric conductivity of conductive layer.
The preparation method of above-mentioned reversed light modulation film, specifically comprises the following steps:
A: the preparation of flexible transparent conducting film: colorless and transparent PET basement membrane is selected, passes through magnetron sputtering on PET basement membrane
Or the mode of coating adheres to conductive layer, and flexible transparent conducting film is made.
B: the preparation of interlayer: using coating, vacuum coating, tiltedly steaming, exposure mask or letterpress mode are adhered on the electrically conductive
Both alignment layers carry out heat treatment for solidification to both alignment layers at 50-80 DEG C, form interlayer.
C: the preparation of polymer dispersed liquid crystals: ratio is used to adjust for the negative liquid crystal of 90:10-70:30 and the stirring of UV glue
With, and microballon is added, the polymer dispersed liquid crystals for being powered and becoming frosted shape, being not powered on bleach shape is made.
D: the preparation of reversed light modulation film: curing apparatus is bonded using roll-to-roll continous way, utilizes and matches between two interlayers
To the alignment capability cohesive polymers dispersed LCD of layer, polymer dispersed liquid crystal layer is formed, directly carries out ultraviolet light curing, is made
Reversed light modulation film.
E: it prepares electrode: connecting circuit on reversed light modulation film.
The beneficial effects of the present invention are:
The present invention relates to a kind of reversed light modulation film, entire product selects flexible parent metal to replace traditional polymer network liquid crystal
Mode is to keep this product flexible, transport easy to produce；Simultaneously by the way that polymer dispersed liquid crystal layer is bonded in two orientations
Between layer, the orientation power of both alignment layers is utilized, it can be ensured that the negative liquid crystal in polymer dispersed liquid crystal layer is perpendicular when power is off
Arrangement, and then ensure that negative liquid crystal is consistent with the refractive index of UV glue, it is born when ensure that it has higher transparency, and being powered
Property liquid crystal be then in horizontal arrangement, then cause the refractive index of negative liquid crystal and UV glue inconsistent in frosted shape, and mist degree is big, masking
Effect is good；By increasing the ratio of UV glue, while the thickness of polymer dispersed liquid crystal layer is reduced, and then guarantees the bonding of product
Transparency when power and power-off；And the low temperature alignment liquid that both alignment layers in the present invention use overcomes traditional both alignment layers and needs height
Temperature may not apply to the defect of film.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Drawing reference numeral explanation: flexible transparent conducting film 1；Both alignment layers 2；Polymer dispersed liquid crystal layer 3.
Specific embodiment
To keep above-mentioned technical problem, technical solution and the advantage of the invention solved clearer, below in conjunction with attached drawing
And specific embodiment is described in detail.
Embodiment 1
As shown in Figure 1, colorless and transparent PET basement membrane is selected, on PET basement membrane the present invention relates to a kind of reversed light modulation film
Adhere to conductive layer by way of magnetron sputtering or spraying, forms flexible transparent conducting film 1；Conductive layer is ito thin film, ZTO is thin
Film, conductive polymer layer, nano-silver conductive layer, any one in graphene conductive layer.
Specifically, using the colorless and transparent PET base material with a thickness of 125 μ m-thicks, with the mode of magnetron sputtering colorless and transparent
PET base material plates ito thin film, so that the sheet resistance of the flexible transparent conducting film 1 of preparation is 100 Ω/, it is seen that light transmittance is
82%, mist degree 0.7%.
Using coating, vacuum coating, tiltedly steaming, exposure mask or letterpress mode adhere to both alignment layers on the electrically conductive, obtain
Bright interlayer, both alignment layers 2 are homeotropic alignment layer, and it is polyimides, nylon, polyethylene that both alignment layers 2, which are organic polymer film,
Any one of alcohol, polyureas, polyamide, and the both alignment layers use low temperature alignment liquid, and then can be attached on film；In 50-
80 DEG C to both alignment layers carry out heat treatment for solidification, both alignment layers with a thickness of 5-300nm, can also further decrease the thickness of both alignment layers,
When both alignment layers are with a thickness of 10-100nm, preferably guarantee both alignment layers have the electric conductivity of enough orientation power and conductive layer to liquid crystal
Energy.
Specifically, the both alignment layers 2 being coated in ito film are polyimide material, heat curing temperature is 120 DEG C, when solidification
Between be 5min, since the both alignment layers are used for vertically oriented purposes, can also be formed without carrying out orientation process has vertical orientation
The liquid crystal orientation film of ability, the thickness for both alignment layers that treated are 50nm.
It uses ratio to reconcile for the negative liquid crystal of 90:10-70:30 and the stirring of UV glue, energization frosted is made, is not powered on
Bright polymer dispersed liquid crystals, the birefringence value of polymer dispersed liquid crystals are 0.12-0.25, no 1.5-1.53；It selects above-mentioned
Two interlayers obtained are bonded curing apparatus with roll-to-roll continous way, both alignment layers, a certain proportion of are utilized between two interlayers
Polymer dispersed liquid crystals is bonded between two both alignment layers by UV glue, forms polymer dispersed liquid crystal layer, polymer dispersion liquid
Crystal layer 3 with a thickness of 3-15 μm, then can be by further decreasing polymer dispersed liquid crystal layer if the large percentage of UV glue
Thickness, at 6 μm hereinafter, when ensuring to power off in turn, entire reversed light modulation film has the thickness of controllable polymer dispersed liquid crystal layer
The transparency well；It directly carries out again ultraviolet light curing, reversed light modulation film is made, connects circuit on reversed light modulation film.
Specifically, it is 0.16 that the n0 of polymer dispersed liquid crystals, which is 1.50, △ n, polymer dispersed liquid crystal layer is with a thickness of 10 μm.
The reversed light modulation film prepared is subjected to electric performance test, visible light transmittance is 82% under off-position, mist degree
It is 76% for visible light transmittance under 4%, 36V energized state, mist degree 90%.
Embodiment 2
As shown in Figure 1, colorless and transparent PET basement membrane is selected, on PET basement membrane the present invention relates to a kind of reversed light modulation film
Adhere to conductive layer by way of magnetron sputtering or spraying, flexible transparent conducting film 1 is made；Conductive layer is ito thin film, ZTO is thin
Film, conductive polymer layer, nano-silver conductive layer, any one in graphene conductive layer.
Specifically, using the colorless and transparent PET base material with a thickness of 188 μ m-thicks, with the mode of magnetron sputtering colorless and transparent
PET base material plates ito thin film, so that the sheet resistance of the flexible transparent conducting film 1 of preparation is 120 Ω/, it is seen that light transmittance is
85%, mist degree 0.7%.
Using coating, vacuum coating, tiltedly steaming, exposure mask or letterpress mode adhere to both alignment layers, both alignment layers 2 on the electrically conductive
For homeotropic alignment layer, both alignment layers 2 are inorganic insulation film, and inorganic insulation film is silica, in silicon nitride, titanium dioxide
Any one, and the both alignment layers use low temperature alignment liquid, and then can be attached on film；Both alignment layers are carried out at 50-80 DEG C
Heat treatment for solidification, both alignment layers with a thickness of 5-300nm.
Specifically, being coated with both alignment layers 2 in ito film, which is silica, and silicon dioxide layer is inclination after solidification
Columnar thin-film structure, have vertically oriented ability, silicon dioxide layer thickness 50nm.
It uses ratio to reconcile for the negative liquid crystal of 90:10-70:30 and the stirring of UV glue, energization is made and becomes frosted shape, lead to
The polymer dispersed liquid crystals of electric bleach shape selects two interlayers of above-mentioned preparation, is set using the fitting solidification of roll-to-roll continous way
It is standby, polymer dispersed liquid crystals is bonded in two both alignment layers using both alignment layers, a certain proportion of UV glue between two interlayers
Between, formed polymer dispersed liquid crystal layer, polymer dispersed liquid crystal layer 3 with a thickness of 3-15 μm, when the large percentage of UV glue
If, then the thickness of polymer dispersed liquid crystal layer can be can control 6 by further decreasing the thickness of polymer dispersed liquid crystal layer
μm hereinafter, entire reversed light modulation film has the good transparency when ensuring to power off in turn；Directly carry out again it is ultraviolet light curing, be made
Reversed light modulation film connects circuit on reversed light modulation film.
Specifically, it is 0.18 that the n0 of polymer dispersed liquid crystals, which is 1.52, △ n, polymer dispersed liquid crystal layer is with a thickness of 6 μm.
The reversed light modulation film prepared is subjected to electric performance test, visible light transmittance is 84.8% under off-position, mist
Degree is that visible light transmittance is 79% under 4.5%, 36V energized state, mist degree 91%, has good covering.
Described roll-to-roll production method and roll-to-roll continous way fitting curing apparatus in the inventive embodiments are to draw
With the content in the application for a patent for invention file of the Patent No. CN201810579965.9 of the patentee's earlier application.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art can easily think of the change or the replacement in technical scope disclosed by the invention, should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
1. a kind of reversed light modulation film, it is characterised in that: there is the flexible transparent conducting film (1) of conductive layer including surface, in flexibility
Adhere to both alignment layers (2) on the conductive layer of transparent conductive film (1), and both alignment layers (2) are homeotropic alignment layer, flexible transparent conducting film
(1) and transparent interlayer is collectively formed in both alignment layers (2), further includes the polymer dispersed liquid crystal layer formed by polymer dispersed liquid crystals
(3), it is bonded with the both alignment layers of interlayer (2) on upper and lower two surface of polymer dispersed liquid crystal layer (3).
2. a kind of reversed light modulation film according to claim 1, it is characterised in that: flexible transparent conducting film (3) includes PET base
Film, is equipped with conductive layer on PET basement membrane, and conductive layer is ito thin film, ZTO film, conductive polymer layer, nano-silver conductive layer, stone
Any one in black alkene conductive layer.
3. a kind of reversed light modulation film according to claim 1, it is characterised in that: the surface of both alignment layers (2) includes that liquid crystal takes
To film, both alignment layers (2) are organic polymer film or are inorganic insulation film, organic polymer film be polyimides, nylon,
Polyvinyl alcohol, polyureas, any one in polyamide；Inorganic insulation film is silica, silicon nitride, appointing in titanium dioxide
It anticipates one kind.
4. a kind of reversed light modulation film according to claim 1, it is characterised in that: use negative liquid crystal, UV glue and microballon
Obtained polymer dispersed liquid crystals, the birefringence value of polymer dispersed liquid crystals are 0.12-0.25, no 1.5-1.53.
5. a kind of reversed light modulation film according to claim 1, it is characterised in that: the thickness of polymer dispersed liquid crystal layer (3)
It is 3-15 μm.
6. a kind of reversed light modulation film according to claim 4, it is characterised in that: when polymer dispersed liquid crystal layer (3) is powered,
Negative liquid crystal is in nearly horizontally arranged distribution；When being not powered on, the perpendicular arranged distribution of negative liquid crystal.
7. a kind of reversed light modulation film according to claim 3, it is characterised in that: both alignment layers with a thickness of 5-300nm.
8. a kind of reversed light modulation film according to claim 7, it is characterised in that: both alignment layers with a thickness of 10-100nm.
9. a kind of preparation method of reversed light modulation film, it is characterised in that: the following steps are included:
A: the preparation of flexible transparent conducting film: selecting colorless and transparent PET basement membrane, passes through magnetron sputtering or painting on PET basement membrane
The mode of cloth adheres to conductive layer, and flexible transparent conducting film is made；
B: the preparation of interlayer: using coating, vacuum coating, tiltedly steaming, exposure mask or letterpress mode adhere to orientation on the electrically conductive
Layer carries out heat treatment for solidification to both alignment layers at 50-80 DEG C, forms interlayer；
C: the preparation of polymer dispersed liquid crystals: using ratio to reconcile for the negative liquid crystal of 90:10-70:30 and the stirring of UV glue, and
Microballon is added, the polymer dispersed liquid crystals for being powered and becoming frosted shape, being not powered on bleach shape is made；
D: the preparation of reversed light modulation film: being bonded curing apparatus using roll-to-roll continous way, between two interlayers using both alignment layers,
UV glue cohesive polymers dispersed LCD forms polymer dispersed liquid crystal layer, directly carries out ultraviolet light curing, obtained reversed light modulation
Film；
E: it prepares electrode: connecting circuit on reversed light modulation film.
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