CN104090431B - A kind of cholesteric liquid crystal polymer orientation layer and preparation method thereof, display panels - Google Patents
A kind of cholesteric liquid crystal polymer orientation layer and preparation method thereof, display panels Download PDFInfo
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Abstract
The invention provides a kind of cholesteric liquid crystal polymer orientation layer and preparation method thereof, display panels, belong to field of liquid crystal display, show realizing multidomain liquid crystal simply.Described method includes: form conventional alignment layers on substrate；Described conventional alignment layers coats the mixture layer mixed by Binaphthol chipal compounds, cholesteric liquid crystal polymerisable monomer, light trigger；Utilize mask plate that described mixture layer is carried out ultraviolet irradiation in cholesteric phase temperature range, through the cholesteric liquid crystal polymerisable monomer generation polyreaction in the irradiation zone of described mask plate, generate cholesteric liquid crystal polymer；Remove unreacted cholesteric liquid crystal polymerisable monomer in described mixture layer, form cholesteric liquid crystal polymer orientation layer；Wherein, described conventional alignment layers is 0 ° of 360 ° of angle circulation change with the differently-oriented directivity of described cholesteric liquid crystal polymer orientation layer.The present invention can be used for realizing in the making of the display panels that multidomain liquid crystal shows.
Description
Technical field
The present invention relates to field of liquid crystal display, particularly relate to a kind of cholesteric liquid crystal polymer orientation layer and preparation side thereof
Method, display panels.
Background technology
Liquid crystal display is in an increasingly wide range of applications in the modern life, as mobile phone display screen, Note Book show
Screen, GPS display screen, LCD TV display screen etc..Along with the progress of science and technology, traditional single domain liquid crystal display is due to contrast
Low, visual angle is asymmetric, different angles viewing display picture there will be the shortcomings such as colour cast, can not meet people to liquid crystal display
The requirement of device.Multidomain Display Technique can be improved the visual angle unsymmetry of liquid crystal display because of it, increase visual angle, raising contrast
Spend, improve GTG reverse, be effectively improved the advantages such as colour cast, apply quite varied at present in display field.
Showing to realize the multidomainization of liquid crystal display, it is studied by many patent documentations.As by liquid crystal
Show that in device pixel is divided into four sub-pixels, in four subpixel area, then carry out friction orientation respectively make liquid crystal
Molecule forms different initial arrangement, then forms multidomain state in applying voltage course, thus realizes multidomain and show；Or at picture
Element base part makes several protrusions, makes to be formed tiltedly between the pixel electrode of special shape and the public electrode of top glass substrate
To electric field, liquid crystal molecule forms multidomain state along direction of an electric field arrangement, thus realizes multidomain liquid crystal and show；It addition, also by
The pixel electrode of structure multidomain realizes multidomain and shows.But the multidomain film liquid crystal device used all has manufacture work
The problem that skill is complicated, process costs is high and difficulty is big.So, how to solve the most simpler, novel realization
The problem that multidomain liquid crystal shows is the major issue needing solution badly that those skilled in the art are faced.
Summary of the invention
Embodiments provide a kind of cholesteric liquid crystal polymer orientation layer and preparation method thereof, LCD
Plate, shows realizing multidomain liquid crystal simply.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
An aspect of of the present present invention provides the preparation method of a kind of cholesteric liquid crystal polymer orientation layer, including:
Substrate is formed conventional alignment layers；
Described conventional alignment layers coats and is drawn by Binaphthol chipal compounds, cholesteric liquid crystal polymerisable monomer, light
Send out the mixture layer that agent mixes；
Utilize mask plate that described mixture layer is carried out ultraviolet irradiation in cholesteric phase temperature range, through described mask plate
Irradiation zone in cholesteric liquid crystal polymerisable monomer generation polyreaction, generate cholesteric liquid crystal polymer；
Remove unreacted cholesteric liquid crystal polymerisable monomer in described mixture layer, form cholesteric liquid crystal polymer and take
To layer；
Wherein, described conventional alignment layers is 0 °-360 ° folders with the differently-oriented directivity of described cholesteric liquid crystal polymer orientation layer
Angle circulation change.
Optionally, the helical twisting power of described Binaphthol chipal compounds reduces with the rising of temperature.
Concrete, described Binaphthol chipal compounds is 1,1 '-(4 '-(2-methyl butyl) biphenyl) Binaphthol ester,
Described cholesteric liquid crystal polymerisable monomer is 2-methyl isophthalic acid, double (4-(the 6 '-propenyloxy group hexyloxy) benzoyloxy) benzene of 4-, institute
Stating light trigger is benzoin dimethylether.
Further, in described mixture, described Binaphthol chipal compounds, cholesteric liquid crystal polymerisable monomer,
The weight/mass percentage composition of light trigger is:
Binaphthol chipal compounds: 0-10%；
Cholesteric liquid crystal polymerisable monomer: 85.7-95.2%；
Light trigger: 4.3-4.8%.
Optionally, certain at the thickness of described cholesteric liquid crystal polymer orientation layer and the polymerization temperature of described mixture
Time, the pitch of described mixture increases with the content of described Binaphthol chipal compounds and reduces.
Optionally, in content and the thickness of described cholesteric liquid crystal polymer orientation layer of described Binaphthol chipal compounds
Degree one timing, the pitch of described mixture increases with the rising of polymerization temperature.
Optionally, described cholesteric liquid crystal polymer orientation layer includes multiple described irradiation zone, when each described
When the width of irradiation zone is 1/n (n is the integer more than zero) of single pixel wide, then in single pixel, it is formed with n kind
The initial arrangement of liquid crystal molecule.
Optionally, solvent method is utilized to remove unreacted cholesteric liquid crystal polymerisable monomer in described mixture.
Another aspect of the present invention provides a kind of cholesteric phase liquid prepared according to the method described in technique scheme
Crystalline polymer oriented layer.
Another aspect of the present invention provides a kind of display panels, prepared by the method described in technique scheme that includes
The cholesteric liquid crystal polymer orientation layer obtained.
The invention provides a kind of cholesteric liquid crystal polymer orientation layer and preparation method thereof, display panels.At this
In the preparation method that provided of invention, conventional alignment layers is formed different from its differently-oriented directivity containing Binaphthol chirality
The cholesteric liquid crystal polymer orientation layer of compound so that the liquid crystal directly contacted with conventional alignment layers in a pixel divides
Son, by its differently-oriented directivity initial arrangement, and and cholesteric liquid crystal polymer orientation layer containing Binaphthol chipal compounds straight
The liquid crystal molecule of contact is then by the orientation initial arrangement of this oriented layer surface molecular, thus is formed many in a pixel
The initial arrangement of individual liquid crystal molecule, it is achieved multidomain liquid crystal shows.The method is simple, easily operates, has production practicality.
Accompanying drawing explanation
The preparation principle figure of the cholesteric liquid crystal polymer orientation layer that Fig. 1 is provided by the embodiment of the present invention；
The helical twisting power variation with temperature curve of the Binaphthol chipal compounds that Fig. 2 provides for the embodiment of the present invention
Figure；
Irradiation zone size in the cholesteric liquid crystal polymer orientation layer that Fig. 3 provides for the embodiment of the present invention is to liquid crystal
Show the design sketch of impact；
Orientation folder between cholesteric liquid crystal polymer orientation layer and conventional alignment layers that Fig. 4 provides for the embodiment of the present invention
Angle is with the change curve of oriented layer thickness；
Orientation folder between cholesteric liquid crystal polymer orientation layer and conventional alignment layers that Fig. 5 provides for the embodiment of the present invention
Angle increases the schematic diagram from 0 ° to 360 ° circulation change with oriented layer thickness；
Fig. 6 is the multidomain liquid crystal display schematic diagram under the cholesteric liquid crystal polymer orientation layer thickness of Fig. 5 (a)；
Fig. 7 is the multidomain liquid crystal display schematic diagram under the cholesteric liquid crystal polymer orientation layer thickness of Fig. 5 (b)；
Fig. 8 is the multidomain liquid crystal display schematic diagram under the cholesteric liquid crystal polymer orientation layer thickness of Fig. 5 (c)；
Fig. 9 is the multidomain liquid crystal display schematic diagram under the cholesteric liquid crystal polymer orientation layer thickness of Fig. 5 (d)；
Figure 10 is the mixture pitch variation with temperature curve chart in the specific embodiment of the invention 1 and 2；
Figure 11 is the mixture pitch variation with temperature curve chart in the specific embodiment of the invention 3.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Below in conjunction with the accompanying drawings to embodiments providing a kind of cholesteric liquid crystal polymer orientation layer and preparation side thereof
Method, display panels are described in detail.
The embodiment provides the preparation method of a kind of cholesteric liquid crystal polymer orientation layer, including:
1) on substrate, conventional alignment layers is formed；
In this step, on substrate, coating is conventionally orientated material, by friction so that formed on substrate and be conventionally orientated
Layer.Wherein, described conventional alignment layers can be friction orientation layer or light redirecting layer.It is understood that those skilled in the art can
Select different types of oriented layer according to producing practical situation, be not especially limited herein.
2) coat on described conventional alignment layers by Binaphthol chipal compounds, cholesteric liquid crystal polymerisable monomer, light
The mixture layer that initiator mixes；
In this step, being also coated with mixture layer on described conventional alignment layers, described mixture layer is by Binaphthol
Chipal compounds, cholesteric liquid crystal polymerisable monomer, light trigger mix.Wherein, Binaphthol chipal compounds itself
And it is not involved in reaction, owing to Binaphthol chipal compounds helical twisting power selected in the present embodiment is relatively big, and with temperature
Change there is stronger dependency, so adding it in the mixture to can help to promote quick to temperature of whole mixture
Perception, is more beneficial for the regulation and control to cholesteric liquid crystal polymer orientation layer differently-oriented directivity.Optionally, described Binaphthol chirality
The helical twisting power of compound reduces with the rising of temperature.As in figure 2 it is shown, in the range of 20-90 DEG C, Binaphthol chirality
The helical twisting power of compound is from 27 μm-1It is reduced to 16.5 μm-1。
In another embodiment of the present invention, concrete, described Binaphthol chipal compounds is 1,1 '-(4 '-(2-first
Base butyl) biphenyl) Binaphthol ester, described cholesteric liquid crystal polymerisable monomer is 2-methyl isophthalic acid, double (4-(the 6 '-propenyloxy group of 4-
Hexyloxy) benzoyloxy) benzene, described light trigger is benzoin dimethylether.Wherein, the chemical structural formula of each component is as follows:
Binaphthol chipal compounds:
Cholesteric liquid crystal polymerisable monomer:
Light trigger:
In another embodiment of the invention, the weight/mass percentage composition formula of each component in described mixture is additionally provided.
Wherein, described Binaphthol chipal compounds, cholesteric liquid crystal polymerisable monomer, the weight/mass percentage composition of light trigger are: connection
Naphthalenediol chipal compounds: 0-10%；Cholesteric liquid crystal polymerisable monomer: 85.7-95.2%；Light trigger: 4.3-4.8%.
Preferably, Binaphthol chipal compounds: 2-5%；Cholesteric liquid crystal polymerisable monomer: 90.5-93.3%；Light trigger:
4.5-4.7%.
3) mask plate is utilized described mixture layer to be carried out ultraviolet irradiation, through described mask in cholesteric phase temperature range
Cholesteric liquid crystal polymerisable monomer generation polyreaction in the irradiation zone of plate, generates cholesteric liquid crystal polymer；
In this step, conventional alignment layers is coated with by Binaphthol chipal compounds, cholesteric liquid crystal polymerizable
The mixture that monomer, light trigger mix, now contacts conventional alignment layers due to mixture, can form certain pitch knot
Structure, when ultraviolet irradiation, the cholesteric liquid crystal polymerisable monomer generation polyreaction formation cholesteric liquid crystal being illuminated region gathers
Compound, this pitch of Simultaneous Stabilization.
In another embodiment of the present invention, optionally, described cholesteric liquid crystal polymer orientation layer includes multiple
Described irradiation zone, when the 1/n that width is single pixel wide (n is the integer more than zero) of each described irradiation zone,
In single pixel, then it is formed with the initial arrangement of n kind liquid crystal molecule.In the present embodiment, it is formed many through described mask plate
Individual irradiation zone, and the size of each irradiation zone have impact on the effect that multidomain liquid crystal shows.Such as, as it is shown on figure 3, (a) when
During the half that width is single pixel wide of each irradiation zone of cholesteric liquid crystal polymer orientation layer, single pixel has
Half molecule directly contacts conventional alignment layers, another semi-direct contact cholesteric liquid crystal polymer orientation layer, thus forms two kinds
The initial arrangement of liquid crystal molecule, i.e. realizes double farmlands liquid crystal display；B () is when each irradiated site of cholesteric liquid crystal polymer orientation layer
When the width in territory is the 1/3 of single pixel wide, the initial arrangement of three kinds of liquid crystal molecules can be formed in single pixel, thus
Realize three farmland liquid crystal displays；C () is single pixel width when the width of each irradiation zone of cholesteric liquid crystal polymer orientation layer
Degree 1/6 time, the initial arrangement of 6 kinds of liquid crystal molecules can be formed in single pixel, thus realize six farmland liquid crystal displays；(d)
As the 1/n that width is single pixel wide of each irradiation zone of cholesteric liquid crystal polymer orientation layer, (n is whole more than zero
Number) time, the initial arrangement of n kind liquid crystal molecule can be formed in single pixel, thus realize multidomain liquid crystal and show.It is appreciated that
, the size of each irradiation zone in described cholesteric liquid crystal polymer orientation layer can be adjusted by regulation mask size
Joint.Those skilled in the art can be actually needed selection mask plate and the size of mask according to producing.
4) remove unreacted cholesteric liquid crystal polymerisable monomer in described mixture layer, form cholesteric liquid crystal polymer
Oriented layer；Wherein, described conventional alignment layers is 0 ° of-360 ° of angle with the differently-oriented directivity of described cholesteric liquid crystal polymer orientation layer
Circulation change.
In this step, available solvent method removes unreacted cholesteric liquid crystal polymerisable monomer in described mixture.
Such as, can be by unreacted cholesteric liquid crystal polymerisable monomer in solvent dissolving mixt layer to be removed, solvent for use
It can be dichloromethane.Certainly, the solvent used is not limited thereto, and those skilled in the art also can be according to practical situation to it
Select.
In this step, the differently-oriented directivity of described cholesteric liquid crystal polymer orientation layer can pass through Binaphthol chirality
The polymerization temperature of compound content, cholesteric liquid crystal polymer orientation layer thickness and mixture regulates.As shown in Figure 4, cholesteric
The differently-oriented directivity of phase liquid crystal polymer oriented layer and the angle of conventional alignment layers differently-oriented directivity, along with oriented layer thickness increase from
0 ° to 360 ° circulation change.As it is shown in figure 5, (a) is when oriented layer thickness d=(n+0.25) P (n is integer), cholesteric liquid crystal
The differently-oriented directivity of polymer orientation layer and conventional alignment layers differently-oriented directivity angle in 90 °；B () is as oriented layer thickness d=(n+0.5)
During P (n is integer), the differently-oriented directivity of cholesteric liquid crystal polymer orientation layer becomes 180 ° of angles with conventional alignment layers differently-oriented directivity；
C (), when oriented layer thickness d=(n+0.75) P (n is integer), the differently-oriented directivity of cholesteric liquid crystal polymer orientation layer is with conventional
Oriented layer differently-oriented directivity becomes 270 ° of degree angles；D (), when oriented layer thickness d=nP (n is integer), cholesteric liquid crystal polymer takes
Becoming 360 ° of angles to the differently-oriented directivity of layer with conventional alignment layers differently-oriented directivity, now two-layer differently-oriented directivity is identical.Fig. 6-9 is corresponding
Multidomain liquid crystal display schematic diagram in the cholesteric liquid crystal polymer orientation layer thickness of Fig. 5 (a)-(d).Wherein, in fig .9, when
When the differently-oriented directivity of cholesteric liquid crystal polymer orientation layer becomes 360 ° of angles with conventional alignment layers differently-oriented directivity, i.e. two-layer orientation side
To identical, multidomain liquid crystal cannot be realized and show.
In polymerization temperature one timing of the thickness of described cholesteric liquid crystal polymer orientation layer and described mixture, described mixed
The pitch of compound increases with the content of described Binaphthol chipal compounds and reduces, the pitch of corresponding described mixture reduce or
Increasing, corresponding oriented layer surface molecular orientation changes, as shown in Fig. 1 (a), (b) and (c).
Certain at the content of described Binaphthol chipal compounds and the thickness of described cholesteric liquid crystal polymer orientation layer
Time, the pitch of described mixture increases with the rising of polymerization temperature, and the pitch of this mixture is gradually increased accordingly, accordingly
Oriented layer surface molecular orientation changes, i.e. its differently-oriented directivity changes.
Embodiments provide the preparation method of a kind of cholesteric liquid crystal polymer orientation layer, in the method,
The cholesteric liquid crystal polymer containing Binaphthol chipal compounds different from its differently-oriented directivity it is formed with on conventional alignment layers
Oriented layer so that the liquid crystal molecule directly contacted with conventional alignment layers in a pixel, by its differently-oriented directivity initial arrangement, and
The liquid crystal molecule directly contacted with the cholesteric liquid crystal polymer orientation layer containing Binaphthol chipal compounds is then orientated by this
The orientation initial arrangement of layer surface molecular, thus in a pixel, form the initial arrangement of multiple liquid crystal molecule, it is achieved
Multidomain liquid crystal shows.The method is simple, easily operates, has production practicality.
The schematic diagram of the preparation method of the cholesteric liquid crystal polymer orientation layer that Fig. 1 is provided by the embodiment of the present invention.Its
Cholesteric liquid crystal polymer orientation layer, 3-that the single pixel of middle 1-, 2-contain Binaphthol chipal compounds contain Binaphthol
The cholesteric liquid crystal polymer orientation layer differently-oriented directivity of chipal compounds, 4-conventional alignment layers, 5-conventional alignment layers differently-oriented directivity,
6-cholesteric liquid crystal polymerisable monomer, 7-Binaphthol chipal compounds, 8-light trigger, 9-contain Binaphthol chiral compound
The cholesteric liquid crystal polymer of thing, 10-substrate.
First on substrate, one layer of conventional alignment layers, " 5 " institute in its differently-oriented directivity such as Fig. 1 are formed by friction etc. method
Show.This conventional alignment layers coats one layer by Binaphthol chipal compounds, cholesteric liquid crystal polymerisable monomer, light trigger
The mixture mixed, owing to this mixture directly contacts with conventional alignment layers, so polymerization monomer molecule herein is by often
The differently-oriented directivity arrangement of rule oriented layer, along with the increase of thickness, mixture molecules align direction gradually distorts, and is formed on its surface
The molecules align direction different from conventional alignment layers differently-oriented directivity, as shown in " 3 " in Fig. 1.Then, heat in a certain temperature, make
This mixture forms certain pitch, utilizes mask ultraviolet irradiation to make to be illuminated the cholesteric liquid crystal polymerisable monomer in region simultaneously
Generation polyreaction generation cholesteric liquid crystal polymer, and stabilize the pitch of the most described mixture, i.e. fix cholesteric phase liquid
Crystalline polymer surface orientation direction；To can not gathered by the cholesteric liquid crystal of ultraviolet light irradiation (i.e. unreacted) by solvent dissolution method
Conjunction monomer removes, thus forms one layer on conventional alignment layers and have different from conventional alignment layers differently-oriented directivity containing dinaphthalene two
The cholesteric liquid crystal polymer orientation layer of phenol chipal compounds.So, directly contacting with conventional alignment layers in a pixel
Liquid crystal molecule can be by its differently-oriented directivity initial arrangement；And the liquid crystal molecule directly contacted with cholesteric liquid crystal polymer orientation layer
Then by the orientation initial arrangement of its oriented layer surface molecular, thus can be formed at the beginning of multiple liquid crystal molecule in a pixel
Begin to arrange, it is achieved multidomain liquid crystal shows.
The embodiment of the present invention provides a kind of cholesteric liquid crystal polymerization prepared according to the method described in above-described embodiment
Thing oriented layer.Embodiments provide a kind of cholesteric liquid crystal polymer orientation layer, owing to being formed on conventional alignment layers
There is the cholesteric liquid crystal polymer orientation layer containing Binaphthol chipal compounds different from its differently-oriented directivity to box
After technique, the liquid crystal molecule directly contacted with conventional alignment layers in a pixel, by its differently-oriented directivity initial arrangement, and and contain
There is the liquid crystal molecule that the cholesteric liquid crystal polymer orientation layer of Binaphthol chipal compounds directly contacts then by this oriented layer table
The orientation initial arrangement of face molecule, thus in a pixel, form the initial arrangement of multiple liquid crystal molecule so that utilize
This cholesteric liquid crystal polymer orientation layer can realize multidomain liquid crystal and show.
Another embodiment of the present invention provides a kind of display panels, prepared by the method described in above-described embodiment that includes
The cholesteric liquid crystal polymer orientation layer obtained.Embodiments provide a kind of display panels, due at this liquid crystal
Display floater includes the cholesteric liquid crystal polymer orientation layer that the embodiment of the present invention prepares, so to box technique
After, the liquid crystal molecule directly contacted with conventional alignment layers in a pixel, by its differently-oriented directivity initial arrangement, and and containing connection
The liquid crystal molecule that the cholesteric liquid crystal polymer orientation layer of naphthalenediol chipal compounds directly contacts then is divided by this oriented layer surface
The orientation initial arrangement of son, thus in a pixel, form the initial arrangement of multiple liquid crystal molecule, make this liquid crystal display
Panel finally can realize multidomain liquid crystal and show.
Below will be according to specific embodiment to cholesteric liquid crystal polymer orientation layer provided by the present invention and preparation side thereof
Method, display panels elaborate.
Embodiment 1
Coating PI oriented layer material, makes it have a certain differently-oriented directivity by methods such as frictions on the glass substrate；Will connection
Naphthalenediol chipal compounds, cholesteric liquid crystal polymerisable monomer, light trigger mix according to 2.0%/93.3%/4.7% mass ratio
Closing uniformly, this mixture pitch variation with temperature curve as shown in Figure 10, wherein, is 1000nm the pitch of 30 DEG C；At PI
Coating the thick said mixture of 125nm in oriented layer, lucifuge operates, and coating is uniformly；Utilize mask and light intensity for 5mw/cm2Purple
Outer light, at this mixture 40 minutes of 30 DEG C of irradiation coating, makes the cholesteric liquid crystal polymerisable monomer being illuminated part occur poly-
Close reaction and generate cholesteric liquid crystal polymer；Utilize the dichloromethane will be not by the cholesteric liquid crystal of ultraviolet light irradiation (i.e. unreacted)
Polymerisable monomer removes, thus the cholesteric liquid crystal forming one layer of angle at 45 ° with its differently-oriented directivity in PI oriented layer is polymerized
Thing oriented layer；So, after vacuum is to box technique, the liquid crystal directly contacted with PI oriented layer in a pixel of liquid crystal panel divides
Son, by its differently-oriented directivity initial arrangement, the liquid crystal molecule directly contacted with cholesteric liquid crystal polymer orientation layer then by with PI
The direction arrangement that molecular orientation direction is at 45 °, thus in a pixel, form the initial arrangement of multiple liquid crystal molecule, it is achieved many
Farmland liquid crystal display.
Embodiment 2
Coat PI oriented layer material, makes it have a certain differently-oriented directivity by methods such as frictions on the glass substrate；Will
Binaphthol chipal compounds, cholesteric liquid crystal polymerisable monomer, light trigger are according to 2.0%/93.3%/4.7% mass ratio
Mix homogeneously, this mixture pitch variation with temperature curve as shown in Figure 10, wherein, is 1200nm the pitch of 65 DEG C；?
Coating the thick said mixture of 300nm in PI oriented layer, lucifuge operates, and coating is uniformly；Utilize mask and light intensity for 5mw/cm2's
Ultraviolet light, at this mixture 40 minutes of 65 DEG C of irradiation coating, makes the cholesteric liquid crystal polymerisable monomer being illuminated part occur
Polyreaction generates cholesteric liquid crystal polymer；Utilize the dichloromethane will be not by the cholesteric phase liquid of ultraviolet light irradiation (i.e. unreacted)
Brilliant polymerisable monomer removes, thus the cholesteric liquid crystal forming one layer of angle in 90 ° with its differently-oriented directivity in PI oriented layer gathers
Compound oriented layer；So, after vacuum is to box technique, the liquid crystal directly contacted with PI oriented layer in a pixel of liquid crystal panel
Molecule, by its differently-oriented directivity initial arrangement, directly contact the liquid crystal molecule of cholesteric liquid crystal polymer orientation layer then by with PI
The direction arrangement that molecular orientation direction is in 90 °, thus in a pixel, form the initial arrangement of multiple liquid crystal molecule, it is achieved many
Farmland liquid crystal display.
Embodiment 3
One layer of PI oriented layer material of coating, makes it have a certain differently-oriented directivity by methods such as frictions on the glass substrate；
By Binaphthol chipal compounds, cholesteric liquid crystal polymerisable monomer, light trigger according to 5.0%/90.5%/4.5% mass
Ratio mix homogeneously, this mixture pitch variation with temperature curve as shown in figure 11, wherein, is 360nm the pitch of 48 DEG C；?
Coating the thick said mixture of 180nm in PI oriented layer, lucifuge operates, and coating is uniformly；Utilize mask and light intensity for 5mw/cm2's
Ultraviolet light, at the mixture 40 minutes of 48 DEG C of irradiation coating, makes the cholesteric liquid crystal polymerisable monomer being illuminated part occur poly-
Close reaction and generate cholesteric liquid crystal polymer；Utilize the dichloromethane will be not by the cholesteric liquid crystal of ultraviolet light irradiation (i.e. unreacted)
Polymerisable monomer removes, thus forms one layer in PI oriented layer and become the cholesteric liquid crystal of 180 ° of angles to be polymerized with its differently-oriented directivity
Thing oriented layer；So, after vacuum is to box technique, the liquid crystal directly contacted with PI oriented layer in a pixel of liquid crystal panel divides
Son, by its differently-oriented directivity initial arrangement, the liquid crystal molecule directly contacting cholesteric liquid crystal polymer orientation layer then divides by with PI
Sub-differently-oriented directivity becomes the direction of 180 ° to arrange, thus forms the initial arrangement of multiple liquid crystal molecule in a pixel, it is achieved many
Farmland liquid crystal display.
Obviously, above-described embodiment is only for clearly demonstrating example, and not restriction to embodiment.Right
For those of ordinary skill in the field, can also make on the basis of the above description other multi-form change or
Variation.Here without also cannot all of embodiment be given exhaustive.And the obvious change thus extended out or
Change the protection domain still in the invention.
Claims (10)
1. the preparation method of a cholesteric liquid crystal polymer orientation layer, it is characterised in that including:
Substrate is formed conventional alignment layers；
Described conventional alignment layers coats by Binaphthol chipal compounds, cholesteric liquid crystal polymerisable monomer, light trigger
The mixture layer mixed；
Utilize mask plate that described mixture layer is carried out ultraviolet irradiation in cholesteric phase temperature range, through the spoke of described mask plate
According to the cholesteric liquid crystal polymerisable monomer generation polyreaction in region, generate cholesteric liquid crystal polymer；
Remove unreacted cholesteric liquid crystal polymerisable monomer in described mixture layer, form cholesteric liquid crystal polymer orientation
Layer；
Wherein, the differently-oriented directivity of described cholesteric liquid crystal polymer orientation layer and the angle of described conventional alignment layers differently-oriented directivity,
Along with the increase of described cholesteric liquid crystal polymer orientation layer thickness is from 0 ° to 360 ° circulation change.
Method the most according to claim 1, it is characterised in that the helical twisting power of described Binaphthol chipal compounds with
The rising of temperature and reduce.
Method the most according to claim 1, it is characterised in that described Binaphthol chipal compounds is 1,1 '-(4 '-(2-
Methyl butyl) biphenyl) Binaphthol ester, the structural formula of described cholesteric liquid crystal polymerisable monomer is:
Described light trigger is benzoin dimethylether.
Method the most according to claim 1, it is characterised in that in described mixture, described Binaphthol chiral compound
Thing, cholesteric liquid crystal polymerisable monomer, the weight/mass percentage composition of light trigger be:
Binaphthol chipal compounds: 0-10%；
Cholesteric liquid crystal polymerisable monomer: 85.7-95.2%；
Light trigger: 4.3-4.8%.
Method the most according to claim 1, it is characterised in that described cholesteric liquid crystal polymer orientation layer thickness and
Polymerization temperature one timing of described mixture, the pitch of described mixture increases with the content of described Binaphthol chipal compounds
And reduce.
Method the most according to claim 1, it is characterised in that at the content of described Binaphthol chipal compounds and described
Thickness one timing of cholesteric liquid crystal polymer orientation layer, the pitch of described mixture increases with the rising of polymerization temperature.
Method the most according to claim 1, it is characterised in that include many in described cholesteric liquid crystal polymer orientation layer
Individual described irradiation zone, as the 1/n that width is single pixel wide (n is the integer more than zero) of each described irradiation zone
Time, then in single pixel, it is formed with the initial arrangement of n kind liquid crystal molecule.
Method the most according to claim 1, it is characterised in that utilize solvent method to remove unreacted gallbladder in described mixture
Steroid phase liquid crystal polymerisable monomer.
9. the cholesteric liquid crystal polymer orientation layer prepared according to the method described in any one of claim 1-8.
10. a display panels, it is characterised in that include and prepare according to the method described in any one of claim 1-8
The cholesteric liquid crystal polymer orientation layer obtained.
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