CN109307967A - A kind of liquid crystal film and preparation method thereof - Google Patents
A kind of liquid crystal film and preparation method thereof Download PDFInfo
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- CN109307967A CN109307967A CN201811457685.7A CN201811457685A CN109307967A CN 109307967 A CN109307967 A CN 109307967A CN 201811457685 A CN201811457685 A CN 201811457685A CN 109307967 A CN109307967 A CN 109307967A
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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
- G02F1/137—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
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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
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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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
- G02F1/133788—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by light irradiation, e.g. linearly polarised light photo-polymerisation
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- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Liquid Crystal (AREA)
- Spectroscopy & Molecular Physics (AREA)
Abstract
The invention discloses a kind of liquid crystal films and preparation method thereof.The liquid crystal film includes substrate, alignment films and liquid crystal layer；Alignment films are set to the side of substrate, and liquid crystal layer is set to side of the alignment films far from substrate；Alignment films have molecule director in the control figure of setting distribution, so that the molecule director of the liquid crystal molecule of neighbouring alignment films and the molecule director of alignment films are in same distribution in liquid crystal layer；Wherein, control figure includes multiple sub- control figures of period arrangement, and the molecule director of the alignment films in sub- control figure is in 0 ° of -180 ° of gradual change, and liquid crystal layer includes nematic liquid crystal and chiral agent.The manipulation in particle two-dimensional space may be implemented in technical solution provided in an embodiment of the present invention, and required optical drive power is smaller and will not cause light injury to particle.
Description
Technical field
The present embodiments relate to the micro- manipulation technical field of particle more particularly to a kind of liquid crystal films and preparation method thereof.
Background technique
With flourishing for MEMS micro-processing technology, the mankind recognize for molecular science technology also from original big ruler
Degree level is promptly drive on boldly to the accurate level such as micron, nanometer.Wherein, increasingly heavier for single or multiple particles manipulations
It wants.
Traditional particle manipulation technology, such as the manipulation of the optical tweezer based on luminous power, although can be realized in micron to nano grade
Manipulation on scale, but due to needing higher driving optical power, this may cause serious light injury to particle.
Therefore, in the particle manipulation of micro/nano-scale, the manipulation to particle in two-dimensional space how is realized, and
Where damage will not be caused to become the hot spot of recent research field to particle in manipulation process.
Summary of the invention
The present invention provides a kind of liquid crystal film and preparation method thereof, right to the manipulation in particle two-dimensional space, and not to realize
Particle causes to damage.
In a first aspect, the embodiment of the invention provides a kind of liquid crystal films, comprising: substrate, alignment films and liquid crystal layer；
Alignment films are set to the side of substrate, and liquid crystal layer is set to side of the alignment films far from substrate；
Alignment films have molecule director in the control figure of setting distribution, so that adjacent to the liquid crystal of alignment films in liquid crystal layer
The molecule director of molecule and the molecule director of alignment films are in same distribution；
Wherein, control figure includes multiple sub- control figures of period arrangement, the molecule of the alignment films in sub- control figure
Director is in 0 ° of -180 ° of gradual change；Liquid crystal layer includes nematic liquid crystal and chiral agent.
Optionally, control figure includes multiple son control figures in rectangle, and multiple sub- control figures prolong along first direction
It stretches and arranges in a second direction；First direction intersects with second direction；Point of the alignment films of son control Graph Control region
Sub- director is in a second direction from 0 ° of -180 ° of gradual change.
Optionally, control figure includes multiple son control figures in concentric ring-shaped, and every sub- control figure shape controls institute
Region alignment films molecule director along son control figure radial direction from 0 ° of -180 ° of gradual change.
Optionally, control figure includes multiple fan-shaped son control figures；Multiple fan-shaped son control figure constitution circles
The control figure of shape；Circular arc of the molecule director of the alignment films of every sub- control figure shape control region along son control figure
Extending direction is from 0 ° of -180 ° of gradual change.
Optionally, the range of nematic liquid crystal and the mass ratio of chiral agent is 99.1:0.9-99.0:1.0
Second aspect, the embodiment of the invention also provides a kind of preparation methods of liquid crystal film, this method comprises:
Substrate is provided；
Alignment films are formed in the side of substrate；
Orientation process is carried out to alignment films, to form molecule director in the control figure of setting distribution；
Liquid crystal layer, neighbouring alignment films in the control Graph Control liquid crystal layer of alignment films are formed far from substrate side in alignment films
Liquid crystal molecule molecule director and alignment films molecule director be in same distribution；
Wherein, control figure includes multiple sub- control figures of period arrangement, the molecule of the alignment films in sub- control figure
Director is in 0 ° of -180 ° of gradual change；The liquid crystal layer includes nematic liquid crystal and chiral agent.
Optionally, photo orientated film is formed in the side of substrate, comprising: oriented material is spin-coated on to the side of substrate, and
There is the substrate of oriented material to make annealing treatment spin coating.
Optionally, corresponding exposure figure is selected according to exposure order using the photo orientated system of dynamic, and corresponding
Induction light polarization direction, to photo orientated film carry out continuous several times exposure.
Optionally, corresponding exposure figure and corresponding induction light polarization direction are selected, photo orientated film is connected
Continuous multiple exposure includes:
The exposure area that adjacent step exposure figure is arranged partly overlaps, and induction light polarization direction is with exposure order monotone increasing
Add or dullness reduces, so that control figure includes multiple sub- control figures in rectangle, multiple sub- control figures are along first direction
Extend and arranges in a second direction；First direction intersects with second direction；The alignment films of son control Graph Control region
Molecule director is in a second direction from 0 ° of -180 ° of gradual change；
Wherein, each exposure figure includes multiple strip transparent areas and multiple strip shading regions, strip transparent area and item
The setting of shape shading region interval, and the strip transparent area in two neighboring exposure figure partly overlaps.
Optionally, corresponding exposure figure and corresponding induction light polarization direction are selected, photo orientated film is connected
Continuous multiple exposure includes: that the exposure area of adjacent step exposure figure is arranged to partly overlap, and induction light polarization direction is with exposure time
Sequence is increased monotonically or dull reduction, so that control figure includes that multiple sons in concentric ring-shaped control figures, every height control
The molecule director of the alignment films of Graph Control region along son control figure radial direction from 0 ° of -180 ° of gradual change；
Wherein, each exposure figure includes multiple concentric ring patterns, includes multiple rings in each concentric ring pattern
Shape transparent area and multiple cyclic annular shading regions, cyclic annular transparent area and cyclic annular shading region interval setting, and in two neighboring exposure figure
Cyclic annular transparent area partly overlap.
Optionally, corresponding exposure figure and corresponding induction light polarization direction are selected, photo orientated film is connected
Continuous multiple exposure includes: that the exposure area of adjacent step exposure figure is arranged to partly overlap, and induction light polarization direction is with exposure time
Sequence is increased monotonically or dull reduction, so that control figure includes multiple fan-shaped son control figures；Multiple fan-shaped son controls
The circular control figure of figure constitution；The molecule director of the alignment films of every sub- control figure shape control region is along son control
The circular arc extending direction of figure is from 0 ° of -180 ° of gradual change；
Wherein, each exposure figure includes multiple fan-shaped transparent areas and multiple fan-shaped shading regions, fan-shaped transparent area and fan
The setting of shape shading region interval, and the fan-shaped transparent area in two neighboring exposure figure partly overlaps.
Liquid crystal film provided in an embodiment of the present invention, by the way that nematic liquid crystal and chiral agent to be sufficiently mixed so that nematic phase liquid
Crystal system is changed into Cholesteric Texture Liquid Crystal system, meanwhile, the anchoring of the liquid crystal molecule of neighbouring alignment films is acted in alignment films
And under the air far from alignment films side acts on the anchoring of the liquid crystal molecule far from alignment films side, finally, liquid crystal layer edge
The normal direction of layer is in the helicoidal structure of setting, and when carrying out illumination to the liquid crystal layer, chiral agent molecule can occur photic different
Structure process, in this process along with the release of helical structure in cholesteric liquid crystal system, this process generates torque band
The movement of particle is moved, to realize the manipulation to Particles Moving.Wherein, liquid crystal molecule rotation so that particle substantially along taking
It is moved to the direction of 0 ° of -180 ° of gradual change of molecule director of film, required optical power is smaller when due to liquid crystal layer progress illumination, institute
Light injury will not be caused to particle.It solves in the prior art since the larger bring of required optical power may cause particle
The problem of damage, is realized to the manipulation in particle two-dimensional surface, and required optical drive power is smaller to cause light loss to particle
The beneficial effect of wound.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of liquid crystal film provided in an embodiment of the present invention；
Fig. 2 is a kind of top view for controlling figure provided in an embodiment of the present invention；
Fig. 3 is a kind of Particles Moving schematic diagram under control figure shown in Fig. 2；
Fig. 4 is another Particles Moving schematic diagram under control figure shown in Fig. 2；
Fig. 5 is the top view of another control figure provided in an embodiment of the present invention；
Fig. 6 is the schematic diagram of the son control figure 220 of the concentric ring-shaped of Fig. 5；
Fig. 7 is a kind of Particles Moving schematic diagram under control figure shown in Fig. 5；
Fig. 8 is another Particles Moving schematic diagram under control figure shown in Fig. 5；
Fig. 9 is the top view of another control figure provided in an embodiment of the present invention；
Figure 10 is a kind of flow chart of the preparation method of liquid crystal film provided in an embodiment of the present invention；
Figure 11 is a kind of pattern of exposure figure provided in an embodiment of the present invention；
Figure 12 is the pattern of another exposure figure provided in an embodiment of the present invention；
Figure 13 is the pattern of another exposure figure provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Fig. 1 is a kind of structural schematic diagram of liquid crystal film provided in an embodiment of the present invention.The liquid crystal film includes: substrate 30, takes
To film 20 and liquid crystal layer 30.Alignment films 20 are set to the side of substrate 30, and liquid crystal layer 30 is set to alignment films 20 far from substrate
30 side, alignment films 20 have molecule director in the control figure of setting distribution, so that neighbouring alignment films in liquid crystal layer 30
The molecule director of 20 liquid crystal molecule and the molecule director of alignment films 20 are in same distribution.Wherein, control figure includes week
Multiple sub- control figures of phase arrangement, the molecule director of the alignment films 20 in sub- control figure are in 0 ° of -180 ° of gradual change, liquid crystal layer
30 include nematic liquid crystal and chiral agent.
Wherein, after nematic liquid crystal and chiral agent mix, nematic liquid crystal system transition is Cholesteric Texture Liquid Crystal body
System, cholesteric liquid crystal have layered structure, and every layer parallel with substrate 10, and molecule is parallel to each other in layer and molecule director is parallel
Change in the molecule director orientation spiral of substrate 30, different layers.Under the anchoring effect of alignment films 20, neighbouring alignment films 20
The molecule director of liquid crystal molecule and the molecule director of alignment films 20 are identical and be parallel to substrate 30, simultaneously as air pair
The strong anchoring of liquid crystal molecule acts on, and the molecule director of the multilayer liquid crystal molecule far from 20 side of alignment films is from being parallel to substrate 30
Gradual change is to perpendicular to substrate 30；Multilayer cholesteric liquid crystal molecule positioned at the middle part of liquid crystal layer 10, molecule director is parallel in layer
Substrate 30, the molecule director orientation spiral variation of different layers, on the whole, liquid crystal layer 10 is arranged in spiral shell along the normal direction of layer
Revolve structure.When carrying out illumination to liquid crystal layer 10, photo-isomerisation process, liquid crystal layer occur for the chiral agent molecule in liquid crystal layer 10
10 helical structure period, which becomes larger and finally disappears, is changed into nematic liquid crystal system, and liquid crystal layer 10 is during untwisting
Particles Moving is driven, to realize the control to Particles Moving.
Liquid crystal film provided in an embodiment of the present invention, by the way that nematic liquid crystal and chiral agent to be sufficiently mixed so that nematic phase liquid
Crystalline substance is changed into Cholesteric Texture Liquid Crystal system, meanwhile, alignment films to the anchoring effect of the liquid crystal molecule of neighbouring alignment films and
Air far from alignment films side is under the anchoring effect of the liquid crystal molecule far from alignment films side, and finally, liquid crystal layer is along layer
Normal direction is in the helicoidal structure of setting, and when carrying out illumination to the liquid crystal layer, the chiral agent molecule in cholesteric liquid crystal is sent out
Raw photo-isomerisation process, the helical structure period, which becomes larger and finally disappears, becomes nematic liquid crystal, in the process untwisted
Middle drive Particles Moving, to realize the manipulation to particle.Wherein, liquid crystal molecule rotation so that particle substantially along alignment films
0 ° of -180 ° of gradual change of molecule director direction movement, due to liquid crystal layer carry out illumination when required optical power it is smaller, so not
Light injury can be caused to particle.It solves in the prior art since the larger bring of required optical power may cause to damage to particle
The problem of, it realizes to the manipulation in particle two-dimensional surface, and required optical drive power is smaller to cause light injury to particle
Beneficial effect.
Based on the above technical solution, optionally, the range of nematic liquid crystal and the mass ratio of chiral agent is 99.1:
0.9-99.0:1.0.Setting is so that the helically twisted of liquid crystal layer 10 can be sufficiently high, so as to drive Particles Moving, together in this way
When, so that the helically twisted of liquid crystal layer 10 can be not too high, and then the photo-isomerisation process for avoiding the occurrence of chiral agent is too long, and
The halfway problem of de-rotation process.
There are many specific setting methods of above-mentioned technical proposal, is described in detail below with regard to typical case, but do not constitute
Limitation to the application.
Fig. 2 is a kind of top view for controlling figure provided in an embodiment of the present invention.Referring to fig. 2, control figure includes multiple
In the son control figure 210 of rectangle, multiple rectangle control figures 210 extend along first direction 410 and 420 row in a second direction
Column；First direction 410 intersects with second direction 420；Rectangular-shaped son control figure 210 controls the alignment films 20 of region
Molecule director is in a second direction 420 from 0 ° of -180 ° of gradual change.First direction is illustratively set in Fig. 2 and second direction is vertical.
Fig. 3 is a kind of Particles Moving schematic diagram under control figure shown in Fig. 2.When the alignment films of liquid crystal film refer to molecule
It is in control figure shown in Fig. 2 to arrow, and liquid crystal layer includes nematic liquid crystal and the chiral azo dyes of model Chad-3c-S
When, uniformly spraying partial size far from alignment films side in liquid crystal layer is 3 μm of particle, then using wavelength be 450-490nm and
Optical power is 0.83 μ w/cm2The blue light source continuous vertical incidence liquid crystal film, with the continuous vertical incidence of blue light, particle
Basic holding level is moved to the left.
Fig. 4 is another Particles Moving schematic diagram under control figure shown in Fig. 2.Divide it when the alignment films of liquid crystal film have
Director is in control figure shown in Fig. 2, and liquid crystal layer includes the nematic liquid crystal and model Chad-3c-R of model E7
When chiral azo dyes, the particle that partial size is 3 μm is uniformly sprayed far from alignment films side in liquid crystal layer, is then using wavelength
450-490nm and optical power are 0.83 μ w/cm2The blue light source continuous vertical incidence liquid crystal film, it is continuous with blue light
Vertical incidence, particle keep moving horizontally to the right substantially.
It is obtained by Fig. 3 and Fig. 4, is in control figure shown in Fig. 2 when the alignment films in liquid crystal film have molecule director
When, which can control the movement that particle carries out horizontal direction in two-dimensional space.
Fig. 5 is the top view of another control figure provided in an embodiment of the present invention.Fig. 6 is the concentric ring-shaped of Fig. 5
The schematic diagram of son control figure 220.Referring to figs. 5 and 6, control figure includes multiple son control figures in concentric ring-shaped
220, the son control figure 220 of each concentric ring-shaped controls the molecule director of the alignment films of region along concentric ring-shaped
Son control figure 220 radial direction from 0 ° of -180 ° of gradual change (being indicated with by white to black gradual change by 0 ° of -180 ° of gradual change in Fig. 5).
Fig. 7 is a kind of Particles Moving schematic diagram under control figure shown in Fig. 5.When the alignment films of liquid crystal film refer to molecule
It is in control figure shown in fig. 5 to arrow, and liquid crystal layer includes the nematic liquid crystal of model E7 and the hand of model Chad-3c-S
Property azo dyes when, uniformly spraying partial size far from alignment films side in liquid crystal layer is 3 μm of particle, the use of wavelength is then 450-
490nm and optical power are 0.83 μ w/cm2The blue light source continuous vertical incidence liquid crystal film, it is continuous vertical with blue light
Incidence, radial direction of the population substantially along the son control figure of concentric ring-shaped are converged towards the center of circle.
Fig. 8 is another Particles Moving schematic diagram under control figure shown in Fig. 5.Divide it when the alignment films of liquid crystal film have
Director is in control figure shown in fig. 5, and liquid crystal layer includes the nematic liquid crystal and model Chad-3c-R of model E7
When chiral azo dyes, the particle that partial size is 3 μm is uniformly sprayed far from alignment films side in liquid crystal layer, is then using wavelength
450-490nm and optical power are 0.83 μ w/cm2The blue light source continuous vertical incidence liquid crystal film, it is continuous with blue light
Vertical incidence, radial direction of the population substantially along the son control figure of concentric ring-shaped are diffused away from the center of circle.
It is obtained by Fig. 7 and Fig. 8, is in control figure shown in fig. 5 when the alignment films in liquid crystal film have molecule director
When, which can control particle and is converged and dissipated in two-dimensional space.
Fig. 9 is the top view of another control figure provided in an embodiment of the present invention.Referring to Fig. 9, it includes more for controlling figure
A fan-shaped son control figure 230；Multiple fan-shaped son control figures 230 constitute circular control figure；Each sector
The molecule director that son control figure 230 controls the alignment films of region prolongs along the circular arc of the son control figure of concentric ring-shaped
Direction is stretched from 0 ° of -180 ° of gradual change.
With continued reference to Fig. 9, when the director that the alignment films of liquid crystal film have point is in control figure shown in Fig. 9, and liquid crystal
When the chiral azo dyes of nematic liquid crystal and model Chad-3c-S of the layer including model E7, in liquid crystal layer far from orientation
It is 3 μm of particle that partial size is uniformly sprayed in film side, the use of wavelength is then 450-490nm and optical power is 0.83 μ w/cm2's
The blue light source continuous vertical incidence liquid crystal film, with the continuous vertical incidence of blue light, population can surround in angular orientation
The center for controlling figure carries out clockwise rotation.It is understood that when other conditions are constant, only by chiral azo dyes
Model when being changed to Chad-3c-R by Chad-3c-S, population can the center in angular orientation around control figure carry out
Counter-clockwise rotary motion.I.e. when there is the alignment films in liquid crystal film molecule director to be in control figure shown in Fig. 9, the liquid crystal
Film can control particle and be rotated in two-dimensional space.
Pass through Fig. 2-Fig. 9, it can be seen that the chirality by changing chiral agent can change the direction of motion of particle, pass through
Change the shape for controlling figure that the molecule director of alignment films is in, thus it is possible to vary the motion mode of particle.
It should be noted that Fig. 2 and Fig. 5 is exemplarily only shown under sub- control figure institute control area for mapping is convenient
Alignment films include that 7 column are orientated membrane molecules, the molecule director of 7 column orientation membrane molecules is from 0 ° of -180 ° of gradual change, adjacent column molecule
The angle of molecule director be 30 °.In a practical situation, in the alignment films under every sub- control figure shape institute control area, point
The identical molecules align of sub- director is multiple row molecule；The molecule director of membrane molecule is orientated from 0 ° of -180 ° of gradual change, progressive formation
In, the range for being spaced degree is 5-10 °.
Based on inventive concept ibid, the embodiment of the invention also provides a kind of preparation method of liquid crystal film, Figure 10 is this
A kind of flow chart of the preparation method for liquid crystal film that inventive embodiments provide.This method specifically includes:
S110, substrate is provided.
Wherein, substrate light transmission rate can be used illustratively can more than or equal to 85% flexible base board or rigid substrates
Think quartz glass or simple glass.
S120, alignment films are formed in the side of substrate.
Optionally, alignment films are photo orientated film.Before forming photo orientated film, to increase photo orientated film and substrate
Wellability and adhesiveness, with washing lotion (mix reagents such as acetone, alcohol) carry out ultrasonic cleaning 30 minutes, then use ultrapure water again
It is cleaned by ultrasonic twice, each 10 minutes.It is dried in 120 DEG C of baking ovens after forty minutes, carries out UVO (UV ozone) and clean 30 minutes.
Optionally, the material of photo orientated film includes in photo-crosslinking material, light degradation material and photic cis-trans isomerism material
At least one.
Optionally, photo orientated film is formed in the side of substrate, comprising: oriented material is spin-coated on to the side of substrate, and
There is the substrate of oriented material to make annealing treatment spin coating.
Optionally, photo orientated film is formed in the side of substrate, following manner can be used: by light control orientation material spin coating
The side of substrate, spin coating parameters are as follows: low speed spin coating 5 seconds, 800 revs/min of revolving speed, high speed spin coating 40 seconds, 3000 revs/min of revolving speed
Clock；Spin coating is had annealing of substrates 10 minutes of light control orientation material, annealing temperature is 105 DEG C, forms photo orientated film, thickness can
For 30nm-50nm.
S130, orientation process is carried out to alignment films, to form molecule director in the control figure of setting distribution.
Optionally, corresponding exposure figure is selected according to exposure order using the photo orientated system of dynamic, and corresponding
Induction light polarization direction, to photo orientated film carry out continuous several times exposure.
Wherein, control figure includes multiple sub- control figures of period arrangement, the molecule of the alignment films in sub- control figure
Director is in 0 ° of -180 ° of gradual change.
S140, liquid crystal layer is formed far from substrate side in alignment films, it is neighbouring in the control Graph Control liquid crystal layer of alignment films
The molecule director of the liquid crystal molecule of alignment films and the molecule director of alignment films are in same distribution.
Optionally, liquid crystal layer is formed according to preset quality than mixture by nematic liquid crystal and chiral agent；Optional nematic phase
The range of liquid crystal and the mass ratio of chiral agent is 99.1:0.9-99.0:1.0.Illustratively, the nematic liquid crystal of model E7
Quality is 0.64852g, and the quality of the chiral azo dyes of model Chad-3c-S is 0.0065g；The nematic phase of model E7
The quality of liquid crystal is 0.29585g, the quality 0.00299g of the chiral azo dyes of model Chad-3c-R.
Optionally, liquid crystal layer is formed far from substrate side in alignment films, following manner can be used: liquid crystal layer material is revolved
Alignment films are coated in far from substrate side, spin coating parameters are as follows: 65 DEG C of temperature controls, low speed spin coating 5 seconds, 800 revs/min of revolving speed, high speed was revolved
Painting 30 seconds, 2400 revs/min of revolving speed, cooled to room temperature.
Any liquid crystal film of above embodiment offer, therefore, the liquid can be provided using the preparation method of the liquid crystal film
The preparation method of epitaxial has the liquid crystal film in above embodiment identical or corresponding beneficial effect, in place of non-explained in details,
It can refer to understanding above, details are not described herein.
Based on the above technical solution, optionally, corresponding exposure figure and corresponding induction light polarization are selected
Direction, carrying out continuous several times exposure to photo orientated film includes:
The exposure area that adjacent step exposure figure is arranged partly overlaps, and induction light polarization direction is with exposure order monotone increasing
Add or dullness reduces, so that control figure includes multiple sub- control figures in rectangle, multiple sub- control figures are along first direction
Extend and arranges in a second direction；First direction intersects with second direction；The alignment films of son control Graph Control region
Molecule director is in a second direction from 0 ° of -180 ° of gradual change.
Wherein, each exposure figure includes multiple strip transparent areas and multiple strip shading regions, strip transparent area and item
The setting of shape shading region interval, and the strip transparent area in two neighboring exposure figure partly overlaps.
Figure 11 is a kind of pattern of exposure figure provided in an embodiment of the present invention.Below with reference to Figure 11, it is illustratively described
Orientation process is carried out to alignment films, so that the control figure that the molecule director distribution of alignment films is in includes multiple in rectangle
Son control figure.It as shown in figure 11, altogether include 18 exposure figures, black bar region is strip shading in each exposure figure
Area, without exposure, white strip region is strip transparent area, and black bar region and white area interval are arranged, each
Black bar region and a white area are considered as a cycle, each period in a second direction 420 length be 108um, often
The length in a exposure figure 420 directions in a second direction is 4.15mm and is 2.33mm along the length of first direction 410.18
In exposure figure, the strip white area in adjacent exposure figure partly overlaps.First exposure figure is selected, setting induction light
Polarization direction is 90 °, and polarization direction mentioned here refers to for 90 ° and rotates clockwise first direction 410 corresponding to 90 °
Direction, carry out first time exposure；Second exposure figure is selected, the polarization direction of setting induction light is 100 °, carries out second
Secondary exposure；Then, exposure figure is successively selected according to direction shown in arrow, induction light is then arranged in every replacement single exposure figure
Polarization direction increases by 10 °, until selecting the 18th exposure figure, the polarization direction of setting induction light is 270 °, carries out the tenth
Eight exposures.After carrying out above-mentioned orientation process to alignment films, the molecule director distribution of alignment films is as shown in Fig. 2, when orientation
Film have molecule director distribution be in control figure shown in Fig. 2 when, the liquid crystal film can manipulate particle in two-dimensional space into
The movement of row horizontal direction.
Optionally, corresponding exposure figure and corresponding induction light polarization direction are selected, photo orientated film is connected
Continuous multiple exposure includes: that the exposure area of adjacent step exposure figure is arranged to partly overlap, and induction light polarization direction is with exposure time
Sequence is increased monotonically or dull reduction, so that control figure includes that multiple sons in concentric ring-shaped control figures, every height control
The molecule director of the alignment films of Graph Control region along son control figure radial direction from 0 ° of -180 ° of gradual change；
Wherein, each exposure figure includes multiple concentric ring patterns, includes multiple rings in each concentric ring pattern
Shape transparent area and multiple cyclic annular shading regions, cyclic annular transparent area and cyclic annular shading region interval setting, and in two neighboring exposure figure
Cyclic annular transparent area partly overlap.
Figure 12 is the pattern of another exposure figure provided in an embodiment of the present invention.Below with reference to Figure 12, illustratively retouch
It states and orientation process is carried out to alignment films, so that the control figure that the molecule director distribution of alignment films is in includes multiple in concentric
Circular son control figure.It as shown in figure 12, altogether include 18 exposure figures, black area in each exposure figure
For circular shading region, without exposure, white area is circular transparent area, black area and white circular
The setting of annular section interval, each black area and a white area are considered as a cycle, Mei Gezhou
The length of phase radially is 108um, and the length in each exposure figure 420 directions in a second direction is 4.15mm and along first party
Length to 410 is 2.33mm.In 18 exposure figures, the white area in adjacent exposure figure partly overlaps.Choosing
With first exposure figure, the polarization direction of setting induction light is 90 °, and polarization direction mentioned here is 90 ° and refers to the
One direction 410 rotate clockwise 90 ° corresponding to direction, carry out first time exposure；Select second exposure figure, setting induction
The polarization direction of light is 100 °, carries out second and exposes；Then, exposure figure is successively selected according to direction shown in arrow, per more
10 ° of the polarization direction increase that induction light is then arranged in single exposure figure is changed, until the 18th exposure figure is selected, setting induction
The polarization direction of light is 270 °, carries out the 18th exposure.After carrying out above-mentioned orientation process to alignment films, the molecule of alignment films
Director distribution as shown in figure 5, when alignment films have molecule director distribution be in control figure shown in fig. 5 when, the liquid crystal film
Particle be can control in the convergence and diverging of two-dimensional space.
Optionally, corresponding exposure figure and corresponding induction light polarization direction are selected, photo orientated film is connected
Continuous multiple exposure includes: that the exposure area of adjacent step exposure figure is arranged to partly overlap, and induction light polarization direction is with exposure time
Sequence is increased monotonically or dull reduction, so that control figure includes multiple fan-shaped son control figures；Multiple fan-shaped son controls
The circular control figure of figure constitution；The molecule director of the alignment films of the son control Graph Control region of each fan shape
Circular arc extending direction along son control figure is from 0 ° of -180 ° of gradual change；
Wherein, each exposure figure includes multiple fan-shaped transparent areas and multiple fan-shaped shading regions, fan-shaped transparent area and fan
The setting of shape shading region interval, and the fan-shaped transparent area in two neighboring exposure figure partly overlaps.
Figure 13 is the pattern of another exposure figure provided in an embodiment of the present invention.Below with reference to Figure 12, illustratively retouch
It states and orientation process is carried out to alignment films, so that the control figure that the molecule director distribution of alignment films is in includes multiple fan-shaped
Son control figure.It as shown in figure 13, altogether include 18 exposure figures, black fan region is fan-shaped hides in each exposure figure
Light area, without exposure, the central angle in black fan region is 13 °, and white fan-shaped region is fan-shaped transparent area, is exposed,
The central angle of white fan-shaped region is 5 °, and the center bisector of white fan-shaped region and the center of adjacent black fan-shaped region are divided equally
The angle of line is 9 °.In 18 exposure figures, the fan-shaped white area in adjacent exposure figure partly overlaps.Select first exposure
The polarization direction of figure, setting induction light is 90 °, and polarization direction mentioned here refers to first direction 410 is suitable for 90 °
Hour hands are rotated by 90 ° corresponding direction, carry out first time exposure；Select second exposure figure, the polarization side of setting induction light
To being 100 °, carries out second and expose；Then, exposure figure, every replacement single exposure are successively selected according to direction shown in arrow
The polarization direction that induction light is then arranged in figure increases by 10 °, until the 18th exposure figure is selected, the polarization side of setting induction light
To being 270 °, the 18th exposure is carried out.After carrying out above-mentioned orientation process to alignment films, the molecule director distribution of alignment films
As shown in figure 9, the liquid crystal film can manipulate grain when there is alignment films molecule director distribution to be in control figure shown in Fig. 9
Son is rotated in two-dimensional space.
It should be noted that in the above-described embodiment, after the completion of every exposure figure exposure, can also expose again primary complete
Black figure, the completely black exposure map time is 5 seconds, in this 5 seconds, the polarization direction of adjustable induction light, and will not be to alignment films
Molecule director distribution has an impact.
It should be noted that Figure 11-Figure 13 merely exemplary the orientation position shown through 18 exposure completion alignment films
Reason, but the restriction not to the application, those skilled in the art can select pattern and the exposure of exposure figure according to the actual situation
Light number, as long as the molecule director of alignment films can be made in the control figure of setting distribution.
After liquid crystal film completes, uniform particle can be sprayed to liquid crystal layer far from alignment films side, so as to grain
Son is manipulated.Concrete operations mode using blowing process by uniform particle blowing to liquid crystal layer far from alignment films side is as follows:
Particle is placed in jet hole right angle, is that 0.21MPa high pressure draught sprays from nozzle in a short time by pressure, so that particle
It equably falls from above, and equably trickles down on liquid crystal layer.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (11)
1. a kind of liquid crystal film characterized by comprising substrate, alignment films and liquid crystal layer；
The alignment films are set to the side of the substrate, and the liquid crystal layer is set to one of the alignment films far from the substrate
Side；
The alignment films have molecule director in the control figure of setting distribution, so that the neighbouring orientation in the liquid crystal layer
The molecule director of the liquid crystal molecule of film and the molecule director of the alignment films are in same distribution；
Wherein, the control figure includes multiple sub- control figures of period arrangement, the alignment films in the sub- control figure
Molecule director is in 0 ° of -180 ° of gradual change；The liquid crystal layer includes nematic liquid crystal and chiral agent.
2. liquid crystal film according to claim 1, which is characterized in that the control figure includes multiple son controls in rectangle
Figure, multiple sub- control figures are extended in a first direction and are arranged in a second direction；The first direction and described second
Direction intersects；The molecule director of the alignment films of each sub- control Graph Control region is along the second direction
From 0 ° of -180 ° of gradual change.
3. liquid crystal film according to claim 1, which is characterized in that the control figure includes multiple in concentric ring-shaped
Son control figure, the molecule director of the alignment films of each sub- control Graph Control region is along the sub- control
The radial direction of figure is from 0 ° of -180 ° of gradual change.
4. liquid crystal film according to claim 1, which is characterized in that the control figure includes multiple fan-shaped son controls
Figure；Multiple fan-shaped son control circular control figures of figure constitution；Each sub- control Graph Control location
The molecule director of the alignment films in domain along the sub- control figure circular arc extending direction from 0 ° of -180 ° of gradual change.
5. liquid crystal film according to claim 1, which is characterized in that the mass ratio of the nematic liquid crystal and the chiral agent
Range be 99.1:0.9-99.0:1.0.
6. a kind of preparation method of liquid crystal film characterized by comprising
Substrate is provided；
Alignment films are formed in the side of the substrate；
Orientation process is carried out to the alignment films, to form molecule director in the control figure of setting distribution；
Liquid crystal layer, neighbour in liquid crystal layer described in the control Graph Control of the alignment films are formed far from substrate side in the alignment films
The molecule director of the liquid crystal molecule of the nearly alignment films and the molecule director of the alignment films are in same distribution；
Wherein, the control figure includes multiple sub- control figures of period arrangement, the alignment films in the sub- control figure
Molecule director is in 0 ° of -180 ° of gradual change；The liquid crystal layer includes nematic liquid crystal and chiral agent.
7. according to the method described in claim 6, it is characterized in that, the side in the substrate forms photo orientated film,
It include: oriented material to be spin-coated on to the side of the substrate, and there is the substrate of oriented material to make annealing treatment spin coating.
8. according to the method described in claim 6, it is characterized in that, using the photo orientated system of dynamic, according to exposure order, choosing
Corresponding exposure figure and corresponding induction light polarization direction are selected, continuous several times exposure is carried out to the photo orientated film.
9. according to the method described in claim 8, it is characterized in that, the corresponding exposure figure of the selection and corresponding luring
Guide-lighting polarization direction, carrying out continuous several times exposure to the photo orientated film includes:
The exposure area that adjacent step exposure figure is arranged partly overlaps, and the induction light polarization direction is with exposure order monotone increasing
Add or dullness reduces, so that the control figure includes multiple sub- control figures in rectangle, multiple sub- control figures are along first
Direction extends and arranges in a second direction；The first direction intersects with the second direction；The sub- control Graph Control institute
Region the alignment films molecule director along the second direction from 0 ° of -180 ° of gradual change；
Wherein, each exposure figure includes multiple strip transparent areas and multiple strip shading regions, the strip transparent area
It is arranged with strip shading region interval, and the strip transparent area in the two neighboring exposure figure partly overlaps.
10. according to the method described in claim 8, it is characterized in that, the corresponding exposure figure of the selection and corresponding luring
Guide-lighting polarization direction, carrying out continuous several times exposure to the photo orientated film includes: the exposure that adjacent step exposure figure is arranged
Region partly overlaps, and the induction light polarization direction is increased monotonically with exposure order or dull reduction, so that the control figure
Figures are controlled in the son of concentric ring-shaped comprising multiple, the alignment films of each sub- control Graph Control region
Molecule director along the sub- control figure radial direction from 0 ° of -180 ° of gradual change；
Wherein, each exposure figure includes multiple concentric ring patterns, includes multiple rings in each concentric ring pattern
Shape transparent area and multiple cyclic annular shading regions, the ring-type transparent area and the cyclic annular shading region interval setting, and two neighboring institute
The cyclic annular transparent area stated in exposure figure partly overlaps.
11. according to the method described in claim 8, it is characterized in that, the corresponding exposure figure of the selection and corresponding luring
Guide-lighting polarization direction, carrying out multiple continuous exposure to the photo orientated film includes: the exposure that adjacent step exposure figure is arranged
Region partly overlaps, and the induction light polarization direction is increased monotonically with exposure order or dull reduction, so that the control figure
Include multiple fan-shaped son control figures；Multiple fan-shaped son control circular control figures of figure constitution；Each institute
The molecule director of the alignment films of sub- control Graph Control region is stated along the circular arc extension side of the sub- control figure
To from 0 ° of -180 ° of gradual change；
Wherein, each exposure figure includes multiple fan-shaped transparent areas and multiple fan-shaped shading regions, the sector transparent area
It is arranged with the fan-shaped shading region interval, and the fan-shaped transparent area in the two neighboring exposure figure partly overlaps.
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