CN107085327B - A kind of electric-controlled light-regulating film and preparation method thereof based on liquid crystal and two tropism dyestuffs - Google Patents
A kind of electric-controlled light-regulating film and preparation method thereof based on liquid crystal and two tropism dyestuffs Download PDFInfo
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- CN107085327B CN107085327B CN201710456245.9A CN201710456245A CN107085327B CN 107085327 B CN107085327 B CN 107085327B CN 201710456245 A CN201710456245 A CN 201710456245A CN 107085327 B CN107085327 B CN 107085327B
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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
- G02F1/137—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
- G02F1/13718—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 based on a change of the texture state of a cholesteric liquid crystal
-
- 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
- G02F1/13731—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 based on a field-induced phase transition
- G02F1/13737—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 based on a field-induced phase transition in liquid crystals doped with a pleochroic dye
-
- 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
- G02F1/13345—Network or three-dimensional gels
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Dispersion Chemistry (AREA)
- Mathematical Physics (AREA)
Abstract
The present invention relates to a kind of electric-controlled light-regulating film based on liquid crystal and two tropism dyestuffs, comprising: the first transparent indium tin oxide Plastic conductive film layer, composite material film layer, the second transparent indium tin oxide Plastic conductive film layer；Wherein, the composite material film layer includes liquid crystal molecule, two tropism dye molecules, macromolecule network, wherein, the first composite regions are collectively formed in liquid crystal molecule and two tropism dye molecules, liquid crystal molecule, two tropism dye molecules and macromolecule network form the second composite regions, and first composite regions are periodically alternately arranged in composite material film layer along incident light vertical direction with the second composite regions.Electric-controlled light-regulating film of the invention has the characteristics that transmitted light angular range is regulatable.The electric-controlled light-regulating film is expected to switch over display between peep-proof and non-peep-proof state by the opening and closing of electric field applied to display.
Description
Technical field
The present invention relates to optics polarization light technology field, in particular to a kind of electric-controlled light-regulating based on liquid crystal and two tropism dyestuffs
Film and preparation method thereof.
Background technique
Nowadays, electronic product has incorporated in people's lives and work, and provides many conveniences for people, but by
It is larger in the visible angle of liquid crystal display, when the information of electronic product by user when being browsed, also easily by side
People peep, for the information such as some business and military secrecy and individual privacy, people are more undesirable, and by side, other people are peeped.
Minnesota Mining and Manufacturing Company takes the lead in developing the peep-proof film with ultra tiny shutter (MICROLOUVER) structure.Fig. 1 is this
The schematic illustration of peep-proof film, as shown, the peep-proof film successively include: in accordance with the order from top to bottom pet layer, adhesive layer,
Ultra micro shutter film layer, adhesive layer, pet layer, adhesive layer, protective layer.Due to the ultra micro shutter film layer in the peep-proof membrane structure,
So that the data that screen can be made to show specializes in the reading of user front, visible area when the peep-proof film is used for display
It is 60 degree (± 30 degree), anyone can only see pitch-dark picture outside visible area, to reach protection individual privacy and enterprise
The purpose of trade secret.But the peep-proof film does not have the characteristic switched between peep-proof and non-peep-proof state.
Summary of the invention
The defect that it is an object of the invention to overcome existing peep-proof film that can not switch between peep-proof and non-peep-proof state,
To provide a kind of peep-proof state can automatically controlled adjusting light modulation film.
To achieve the goals above, the present invention provides a kind of electric-controlled light-regulating film based on liquid crystal and two tropism dyestuffs, packet
It includes: the first transparent indium tin oxide Plastic conductive film layer, composite material film layer, the second transparent indium tin oxide Plastic conductive film layer；Its
In, the composite material film layer includes liquid crystal molecule, two tropism dye molecules, macromolecule network, wherein liquid crystal molecule and two to
The first composite regions, liquid crystal molecule, two tropism dye molecules and the common shape of macromolecule network is collectively formed in property dye molecule
At the second composite regions, first composite regions and the second composite regions in composite material film layer along
Incident light vertical direction is periodically alternately arranged.
In above-mentioned technical proposal, for the width range of any first composite regions between 10-80 μm, any second is multiple
The width range of material area is between 10-80 μm.
In above-mentioned technical proposal, the macromolecule network is occurred under ultraviolet light by causing photopolymerizable monomer
Polymerization reaction and formed；Wherein, the photopolymerizable monomer are as follows: simple function group perhaps multi-functional liquid crystal liquid crystal property monomer or
The mixture of the mixture or liquid crystal liquid crystal property monomer of plurality of liquid crystals monomer and non-liquid crystal property monomer；The photopolymerizable monomer
Content is the 10-70wt% of mixed liquor total content.
In above-mentioned technical proposal, the two tropisms dyestuff is red using two tropism black dyes of positivity or two tropism of positivity
The mixture of two tropism weld of color dyestuff, two tropism blue dyes of positivity and positivity.
In above-mentioned technical proposal, the liquid crystal selects nematic liquid crystal or cholesteric liquid crystal.
In above-mentioned technical proposal, the thickness of the composite material film layer between 5-50 μm, the composite material film layer
Thickness is determined by the size of spacer particle；The spacer particle selects the glass microballoon of certain size, and content is two tropisms dye
Expect molecule, photopolymerizable monomer, liquid crystal molecule, photoinitiator, spacer particle mixed liquor total content 0.1-1.0wt%.
In above-mentioned technical proposal, the electric-controlled light-regulating film, when light incidence, transmits light distribution in when electricity condition is not added
In a wider angular range；When the electric-controlled light-regulating film is in powering state, when light incidence, light distribution is transmitted
In a relatively narrow angular range.
The present invention also provides a kind of display, which, as display screen, passes through electricity using the electric-controlled light-regulating film
The opening and closing of field, display switch between peep-proof and non-peep-proof state.
The present invention also provides the preparation methods of electric-controlled light-regulating film, comprising:
The transparent indium tin oxide Plastic conductive film layer that step 1), preparation have been orientated；
Step 2) mixes photopolymerizable monomer, liquid crystal molecule, two tropism dye molecules, photoinitiator, spacer particle
After even, mixed liquor is clipped among two layers of transparent indium tin oxide Plastic conductive film layer, film is then made；
Step 3) irradiates the film by using UV light permeability exposure mask, can gather through the ultraviolet light-initiated light of exposure mask
Reaction, which is crosslinked, between conjunction monomer molecule forms macromolecule network, liquid crystal molecule, two tropism dye molecule composite regions, and
Shielded part forms liquid crystal molecule, two tropism dye molecule composite regions, to be formed along incident light vertical direction
Periodically alternately arranged structure.
The present invention has the advantages that
Electric-controlled light-regulating film peep-proof of the invention has excellent performance and automatically controlled can adjust, and preparation method is simple, and personal in protection
While privacy Considerable effect, light transmittance will not be affected.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the peep-proof film with ultra tiny shutter of Minnesota Mining and Manufacturing Company's exploitation；
Fig. 2 is the light absorption schematic diagram of two tropism dyestuff of positivity；
Fig. 3 (a) is the schematic diagram of obtained film when preparing electric-controlled light-regulating film in embodiment 1；
Fig. 3 (b) is the schematic diagram for irradiating film shown in Fig. 3 (a) in embodiment 1 using UV light permeability exposure mask；
Fig. 3 (c) is electric-controlled light-regulating film prepared in embodiment 1 in the state diagram for being not powered on pressure；
Fig. 3 (d) is state diagram of the electric-controlled light-regulating film prepared in embodiment 1 under making alive；
Fig. 4 (a) is the schematic diagram of obtained film when preparing electric-controlled light-regulating film in embodiment 2；
Fig. 4 (b) is the schematic diagram for irradiating film shown in Fig. 4 (a) in embodiment 2 using UV light permeability exposure mask；
Fig. 4 (c) is electric-controlled light-regulating film prepared in embodiment 2 in the state diagram for being not powered on pressure；
Fig. 4 (d) is state diagram of the electric-controlled light-regulating film prepared in embodiment 2 under making alive；
Fig. 5 (a) is electric-controlled light-regulating film prepared in embodiment 2 in the petrographic microscope figure being not added under electricity condition；
Fig. 5 (b) is the petrographic microscope figure in the power-on state of electric-controlled light-regulating film prepared in embodiment 1；
Fig. 6 (a) is electric-controlled light-regulating film prepared in embodiment 2 in the petrographic microscope figure being not added under electricity condition；
Fig. 6 (b) is the petrographic microscope figure in the power-on state of electric-controlled light-regulating film prepared in embodiment 2；
Fig. 7 is that electricity condition (in figure shown in lines 1) and powering state is not added in electric-controlled light-regulating film prepared in embodiment 1
Angle-the surface of intensity distribution of (in figure shown in lines 2)；
Fig. 8 is that electricity condition (in figure shown in lines 1) and powering state is not added in electric-controlled light-regulating film prepared in embodiment 2
Angle-the surface of intensity distribution of (in figure shown in lines 2).
Specific embodiment
Now in conjunction with attached drawing, the invention will be further described.
Electric-controlled light-regulating film of the invention successively include: from top to bottom the first transparent indium tin oxide (ITO) Plastic conductive film layer,
Composite material film layer, the second transparent indium tin oxide Plastic conductive film layer；Wherein, the composite material film layer includes liquid crystal point
Son, two tropism dye molecules, macromolecule network, wherein the first composite wood is collectively formed in liquid crystal molecule and two tropism dye molecules
Expect region, the second composite regions are collectively formed in liquid crystal molecule, two tropism dye molecules and macromolecule network, and described first is multiple
Material area is periodically alternately arranged in composite material film layer along incident light vertical direction with the second composite regions.
Between 10-80 μm, the width range of any second composite regions exists the width range of any first composite regions
Between 10-80 μm.
Under conditions of UV irradiates, by causing photopolymerizable monomer polymerization reaction shape occurs for the macromolecule network
At.The photopolymerizable monomer can choose simple function group perhaps multi-functional liquid crystal liquid crystal property monomer or plurality of liquid crystals list
The mixture of the mixture or liquid crystal liquid crystal property monomer of body and non-liquid crystal property monomer.Photopolymerizable content of monomer is generally mixed liquor
The 10-70wt% of total content.Photoinitiator generally select Irgacure651, Irgacure184, Irgacure1173,
One of Irgacure127, Irgacure2959, Irgacure784, Irgacure2022.Photoinitiator levels are poly- for light
Close the 0.5-10wt% of content of monomer.
The two tropisms dyestuff should use two tropism orchil of two tropism black dyes of positivity or positivity, positivity
The mixture of two tropism weld of two tropism blue dyes and positivity, specifically can be selected azo, Anthraquinones or other be applicable in
Two tropism dyestuffs.Fig. 2 is the light absorption schematic diagram of two tropism dyestuff of positivity, and the lines 1 in figure indicate two tropism dyestuff of positivity
With absorptivity of light vector when parallel, lines 2 indicate absorptivity of the two tropism dyestuff of positivity with light vector when vertical, 3 table of lines
Show absorptivity of the two tropism dyestuff of positivity under non-polarized light.It can be seen from the figure that two tropism dyestuff of positivity and light vector are flat
Absorptivity when row and two tropism dyestuff of positivity and light vector have apparent difference compared with absorptivity when vertical.
Nematic liquid crystal (NLC) or cholesteric liquid crystal (N*LC) can be selected in the liquid crystal.The quotient of positivity may be selected in NLC liquid crystal
It with product or voluntarily synthesizes, such as the mixing of one or more of E7, E8,5CB, SLC1717, SLC09535, SLC7011-100
Object.N*LC may be selected commercial product or voluntarily synthesis or chipal compounds incorporation NLC be prepared.Chipal compounds are optional
With commercial product or voluntarily synthesize.Common chipal compounds commercial product has: S811, CB15, R1011, R5011 etc..
The thickness of the composite material film layer can be controlled multiple between 5-50 μm by controlling the size of spacer particle
The thickness of condensation material film layer.Spacer particle selects the glass microballoon of certain size, and content is two tropism dye molecules, photopolymerizable
Monomer, liquid crystal molecule, photoinitiator, spacer particle mixed liquor total content 0.1-1.0wt%.
NLC and N*LC will be selected as liquid crystal molecule material respectively in the following embodiments, with regard to how to prepare the present invention
The process of electric-controlled light-regulating film be illustrated.
Embodiment 1
Firstly, after the pet substrate for being coated with ito film detergent and warm water are cleaned one time, by the particle dust of pet substrate
It removes, is then cleaned with acetone soln, one layer of PVA alignment agent of spin coating, high temperature on the pet substrate for be coated with ito film with impurity
(110 DEG C) solidification 2h, and carry out friction orientation.Then, by photo-polymerizable liquid crystal monomer, DD molecule, NLC molecule, photoinitiator,
Spacer particle after mixing, mixed liquor is clipped among two layers of transparent ITO Plastic conductive film, is then pressed into pressure roller method thin
Film, at this time as shown in Fig. 3 (a).Then, as shown in Fig. 3 (b), film is irradiated through exposure mask by using ultraviolet (UV) light, is penetrated
Reaction is crosslinked between the ultraviolet light-initiated photopolymerizable monomer molecule of exposure mask, and to form photo-polymerizable liquid crystal network, NLC, DD compound
Material area, and shielded part forms the composite regions NLC, DD, material is thus formed along incident light vertical direction week
The alternately arranged structure of phase property.
When the electric-controlled light-regulating film being prepared by the above method is not powered on pressure, as shown in Fig. 3 (c), NLC molecule is in flat
Face state, according to guest-host effect, DD molecule is also planar orientation.The light absorption direction of DD molecule is vertical with incident light direction at this time,
Therefore weaker to absorbing incident light, transmitted light is distributed in-α1~+α1Wider angular range in.When electric-controlled light-regulating film is plus electricity
After, as shown in Fig. 3 (d), plane state is anchored at by the DD molecule in a part of region of photo-polymerizable liquid crystal network anchor, not
Another region DD molecule being anchored is vertically oriented along the direction of electric field with NLC molecule, and transmitted light can only be distributed in-α2~
+α2Relative narrow-angle within the scope of.
Embodiment 2
Firstly, after the pet substrate for being coated with ito film detergent and warm water are cleaned one time, by the particle dust of pet substrate
It removes, is then cleaned with acetone soln, one layer of PVA alignment agent of spin coating, high temperature on the pet substrate for be coated with ito film with impurity
(110 DEG C) solidification 2h, then carry out friction orientation.Then, by photo-polymerizable liquid crystal monomer, DD molecule, N*LC molecule, light-initiated
Agent, spacer particle after mixing, mixed liquor are clipped among two layers of transparent ITO Plastic conductive film, is then pressed into pressure roller method
Film, at this time as shown in Fig. 4 (a).Then, as shown in Fig. 4 (b), film is irradiated through exposure mask by using ultraviolet (UV) light, thoroughly
It crosses between the ultraviolet light-initiated photo-polymerizable liquid crystal monomer molecule of exposure mask and crosslinks reaction and form photo-polymerizable liquid crystal network, N*
The composite regions LC, DD, and shielded part forms the composite regions N*LC, DD, material is thus formed along incident light
The periodically alternately arranged structure of vertical direction.
When the electric-controlled light-regulating film being prepared by the above method is not powered on pressure, as shown in Fig. 4 (c), N*LC molecule is in
Plane state, according to guest-host effect, DD molecule is also planar orientation.The light absorption direction of DD molecule and incident light direction hang down at this time
Directly, presentation is weaker to absorbing incident light, and transmitted ray is distributed in-α3~+α3Wider angular range in.When electric-controlled light-regulating film
In addition as shown in Fig. 4 (d), being anchored at by the DD molecule in a part of region of photo-polymerizable liquid crystal network anchor flat after electric field
Face state, the DD molecule that another part region is not anchored are orientated with N*LC along the direction of electric field, form Focal conic state, at this time DD
The orientation of molecule is random.In the power-on state, the composite material film layer in light modulation film, which is formed, has similar ultra micro shutter
Structure, transmitted light can only be distributed in-α4~+α4Relatively narrow angular range in.
Fig. 5 (a) is electric-controlled light-regulating film prepared in embodiment 1 in the petrographic microscope figure being not added under electricity condition, Fig. 5
(b) be electric-controlled light-regulating film prepared in embodiment 1 petrographic microscope figure in the power-on state.Fig. 6 (a) is embodiment 2
In prepared electric-controlled light-regulating film in the petrographic microscope figure being not added under electricity condition, Fig. 6 (b) is prepared in embodiment 2
The petrographic microscope figure in the power-on state of electric-controlled light-regulating film.As can be seen that electric-controlled light-regulating from these petrographic microscope figures
Film has periodic striated structure.
Fig. 7 is that electricity condition (in figure shown in lines 1) and powering state is not added in electric-controlled light-regulating film prepared in embodiment 1
Angle-the surface of intensity distribution of (in figure shown in lines 2).Fig. 8 is that electricity condition is not added in electric-controlled light-regulating film prepared in embodiment 2
Angle-surface of intensity distribution of (in figure shown in lines 1) and powering state (in figure shown in lines 2).It can be seen that from the two figures
For electric-controlled light-regulating film prepared by embodiment 1 and embodiment 2 under powered or non-powered state, visual angle has significant change, reaches
The purpose that switches between peep-proof and non-peep-proof state.
The guest-host effect property of electric-controlled light-regulating film application liquid crystal proposed by the present invention and two tropism dyestuffs is applying electric field
In the case of, the user of liquid crystal display can be made to read from the 60 degree visual angles in front, i.e., 30 degree of left and right in addition in any direction on see
The data of unclear screen protects trade secret and individual privacy, so that the use of computer is more leisurely and carefree.
Based on above-mentioned electric-controlled light-regulating film, the present invention also provides a kind of display, which can using aforementioned visual angle
The electric-controlled light-regulating film of regulation is as display screen, and by the opening and closing of electric field, display is between peep-proof and non-peep-proof state
It switches over.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng
It is described the invention in detail according to embodiment, those skilled in the art should understand that, to technical side of the invention
Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention
Scope of the claims in.
Claims (9)
1. a kind of electric-controlled light-regulating film based on liquid crystal and two tropism dyestuffs characterized by comprising the modeling of the first transparent indium tin oxide
Expect conductive film layer, composite material film layer, the second transparent indium tin oxide Plastic conductive film layer；Wherein, the composite material film layer packet
Include liquid crystal molecule, two tropism dye molecules, macromolecule network, wherein liquid crystal molecule and two tropism dye molecules are collectively formed
The second composite regions, institute is collectively formed in one composite regions, liquid crystal molecule, two tropism dye molecules and macromolecule network
It is periodical along incident light vertical direction in composite material film layer to state the first composite regions and the second composite regions
It is alternately arranged.
2. the electric-controlled light-regulating film according to claim 1 based on liquid crystal and two tropism dyestuffs, which is characterized in that any first
The width range of composite regions between 10-80 μm, the width ranges of any second composite regions 10-80 μm it
Between.
3. the electric-controlled light-regulating film according to claim 1 based on liquid crystal and two tropism dyestuffs, which is characterized in that in ultraviolet light
Under irradiation, the macromolecule network is formed by causing photopolymerizable monomer generation polymerization reaction；Wherein, the photopolymerizable
Monomer are as follows: the mixture or liquid crystal liquid crystal property of simple function group perhaps multi-functional liquid crystal liquid crystal property monomer perhaps plurality of liquid crystals monomer
The mixture of monomer and non-liquid crystal property monomer；The photopolymerizable content of monomer is the 10-70wt% of mixed liquor total content；It is described
Mixed liquor includes: two tropism dye molecules, photopolymerizable monomer, liquid crystal molecule, photoinitiator and spacer particle.
4. the electric-controlled light-regulating film according to claim 1 based on liquid crystal and two tropism dyestuffs, which is characterized in that described two to
Property dyestuff use two tropism orchil of two tropism black dyes of positivity or positivity, two tropism blue dyes of positivity and positivity
The mixture of two tropism welds.
5. the electric-controlled light-regulating film according to claim 1 based on liquid crystal and two tropism dyestuffs, which is characterized in that the liquid crystal
Select nematic liquid crystal or cholesteric liquid crystal.
6. the electric-controlled light-regulating film according to claim 1 based on liquid crystal and two tropism dyestuffs, which is characterized in that described compound
Between 5-50 μm, the thickness of the composite material film layer is determined the thickness of film layer by the size of spacer particle；It is described
Spacer particle selects the glass microballoon of certain size, and content is two tropism dye molecules, photopolymerizable monomer, liquid crystal molecule, light
Initiator, spacer particle mixed liquor total content 0.1-1.0wt%.
7. the electric-controlled light-regulating film according to claim 1 based on liquid crystal and two tropism dyestuffs, which is characterized in that described automatically controlled
Light modulation film is in when being not added electricity condition, and when light incidence, transmitted light is distributed in a wider angular range；When the electricity
When controlled dimming film is in powering state, when light incidence, transmitted light is distributed in a relatively narrow angular range.
8. a kind of display, which is characterized in that the display is using electric-controlled light-regulating film described in one of claim 1-7 as aobvious
Display screen, by the opening and closing of electric field, display switches between peep-proof and non-peep-proof state.
9. the preparation method of electric-controlled light-regulating film described in a kind of one of claim 1-7, comprising:
The transparent indium tin oxide Plastic conductive film layer that step 1), preparation have been orientated；
Photopolymerizable monomer, liquid crystal molecule, two tropism dye molecules, photoinitiator, spacer particle are uniformly mixed by step 2)
Afterwards, mixed liquor is clipped among two layers of transparent indium tin oxide Plastic conductive film layer, film is then made；
Step 3) irradiates the film by using UV light permeability exposure mask, through the ultraviolet light-initiated photopolymerizable list of exposure mask
Body is intermolecular to be crosslinked reaction and forms macromolecule network, liquid crystal molecule, two tropism dye molecule composite regions, and is hidden
It covers part and forms liquid crystal molecule, two tropism dye molecule composite regions, to be formed along the incident light vertical direction period
The alternately arranged structure of property.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710456245.9A CN107085327B (en) | 2017-06-16 | 2017-06-16 | A kind of electric-controlled light-regulating film and preparation method thereof based on liquid crystal and two tropism dyestuffs |
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| CN108107639B (en) * | 2017-12-29 | 2020-05-19 | 南京优写智能科技有限公司 | Preparation method of high-conductivity liquid crystal dimming film |
| CN108169953B (en) * | 2018-01-03 | 2024-03-01 | 京东方科技集团股份有限公司 | Peep-proof display device and switching method thereof |
| CN108845462B (en) * | 2018-06-29 | 2022-05-24 | 南方科技大学 | All-solid-state reflection/absorption film and preparation method and application thereof |
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| CN111103736B (en) * | 2018-10-26 | 2022-10-28 | 江苏和成显示科技有限公司 | Guest-host liquid crystal medium and guest-host liquid crystal light modulation device |
| CN110865496A (en) * | 2019-11-07 | 2020-03-06 | 深圳市华星光电半导体显示技术有限公司 | Display panel, preparation method thereof and display device |
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| CN111880326B (en) * | 2020-08-17 | 2023-06-27 | 京东方科技集团股份有限公司 | Peep-proof display device, preparation method thereof and display device |
| CN111856805A (en) * | 2020-08-28 | 2020-10-30 | 京东方科技集团股份有限公司 | Dimming glass and glass assembly |
| CN112034640B (en) * | 2020-09-11 | 2023-03-17 | 京东方科技集团股份有限公司 | Peep-proof panel, preparation method, driving method and display device |
| CN112433403A (en) * | 2020-11-13 | 2021-03-02 | 武汉大学 | Light modulation device |
| CN112631001A (en) * | 2020-12-21 | 2021-04-09 | 武汉华星光电技术有限公司 | Display module and display device |
| US11762226B2 (en) | 2021-07-27 | 2023-09-19 | Innolux Corporation | Display device and display device control method |
| CN117567875B (en) * | 2024-01-15 | 2024-04-16 | 北京大学 | Dichroic black dye, PDLC dimming film containing dye and preparation method of PDLC dimming film |
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