CN111454736A - Circular polarization modulation device and preparation method thereof - Google Patents
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- 230000010287 polarization Effects 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title description 5
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 52
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 150000001875 compounds Chemical class 0.000 claims abstract description 28
- 238000007699 photoisomerization reaction Methods 0.000 claims abstract description 27
- 239000004593 Epoxy Substances 0.000 claims abstract description 22
- 239000000178 monomer Substances 0.000 claims abstract description 22
- 150000003573 thiols Chemical class 0.000 claims abstract description 22
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 15
- 210000002858 crystal cell Anatomy 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 230000005684 electric field Effects 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 239000004971 Cross linker Substances 0.000 claims abstract description 7
- 238000005192 partition Methods 0.000 claims abstract description 5
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 5
- 230000001678 irradiating effect Effects 0.000 claims abstract description 3
- 239000000758 substrate Substances 0.000 claims description 49
- 210000004027 cell Anatomy 0.000 claims description 4
- 150000001988 diarylethenes Chemical class 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 238000007641 inkjet printing Methods 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 3
- LFOIDLOIBZFWDO-UHFFFAOYSA-N 2-methoxy-6-[6-methoxy-4-[(3-phenylmethoxyphenyl)methoxy]-1-benzofuran-2-yl]imidazo[2,1-b][1,3,4]thiadiazole Chemical compound N1=C2SC(OC)=NN2C=C1C(OC1=CC(OC)=C2)=CC1=C2OCC(C=1)=CC=CC=1OCC1=CC=CC=C1 LFOIDLOIBZFWDO-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/66—Mercaptans
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/54—Additives having no specific mesophase characterised by their chemical composition
- C09K19/542—Macromolecular compounds
- C09K19/544—Macromolecular compounds as dispersing or encapsulating medium around the liquid crystal
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2250/00—Compositions for preparing crystalline polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/54—Additives having no specific mesophase characterised by their chemical composition
- C09K19/542—Macromolecular compounds
- C09K2019/546—Macromolecular compounds creating a polymeric network
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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
- G02F1/13345—Network or three-dimensional gels
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Abstract
A method for manufacturing a circular polarization modulation device is characterized by comprising the following steps. Mixing a liquid crystalline epoxy monomer, a liquid crystalline thiol cross-linking agent, negative liquid crystal, an ultraviolet photoisomerization chiral compound and an accelerator, and pouring the mixture into a liquid crystal box; applying an electric field to the liquid crystal cell to induce the mixture to adopt a parallel orientation; irradiating ultraviolet light on the liquid crystal box by utilizing a photomask in a partition mode to induce the chiral inversion of the ultraviolet photoisomerization chiral compound; and heating the liquid crystal cell to initiate a polymerization reaction between the liquid crystalline epoxy monomer and the liquid crystalline thiol crosslinker.
Description
[ technical field ] A method for producing a semiconductor device
The disclosure relates to the technical field of display, and in particular relates to a circular polarization modulation device and a preparation method thereof.
[ background of the invention ]
The 3D display has attracted much research interest in academia and industry due to its depth information, ability to implement many functions and viewing experiences that 2D displays do not have. With the development of science and technology, 3D display technology is gradually developed.
Currently, the polarized glasses type stereoscopic display technology is one of the most widely applied 3D technologies. The principle of the polarized glasses type stereoscopic display technology is as follows: a viewer wears polarized glasses with two lenses with orthogonal or opposite polarization directions, and a polarized light modulation device is added on the display device, so that light emitted by a part of pixels is emitted in a first polarization direction and can pass through the polarized lens of the left eye, but can be blocked by the polarized lens of the right eye; the light of the other part of pixels is emitted in the second polarization direction, can be blocked by the polarized lens of the left eye, but can pass through the polarized lens of the right eye, so that the left eye and the right eye of a viewer can see the left eye image and the right eye image, and the stereoscopic feeling is obtained.
Compared with the linear polarization glasses type 3D, the polarized light screened out by the circular polarization glasses type 3D is only related to the rotation direction of the polarized light, and no specific polarization direction exists, so that a viewer is allowed to have a wider application market without keeping the head level.
The currently common polarization modulation device mainly comprises a phase difference plate and a liquid crystal type active phase retardation device. The phase difference plate is generally prepared by multilayer resin through a plurality of stretching processes, and the processes are relatively complicated; the liquid crystal active phase delay device can be regarded as a simple liquid crystal box, the orientation of liquid crystal molecules is controlled in a subarea mode through an electric field, and the purpose of controlling the polarization direction of light rays in a subarea mode is achieved.
[ summary of the invention ]
In order to solve the technical problem, the invention provides a circular polarization modulation device and a preparation method thereof.
The invention discloses a preparation method of a circular polarization modulation device, which is characterized by comprising the following steps of: mixing a liquid crystalline epoxy monomer, a liquid crystalline thiol cross-linking agent, negative liquid crystal, an ultraviolet photoisomerization chiral compound and an accelerator, and pouring the mixture into a liquid crystal box; applying an electric field to the liquid crystal cell to induce the mixture to assume a planar orientation; irradiating ultraviolet light on the liquid crystal box by utilizing a photomask in a partition mode to induce the chiral inversion of the ultraviolet photoisomerization chiral compound; and heating the liquid crystal cell to initiate a polymerization reaction between the liquid crystalline epoxy monomer and the liquid crystalline thiol crosslinker to form a rigid polymer network.
According to one aspect of the invention, the mass content of the liquid crystalline epoxy monomer is 0.5 wt% to 15 wt%, the mass content of the liquid crystalline thiol crosslinking agent is 0.5 wt% to 15 wt%, the mass content of the negative liquid crystal is 65 wt% to 98.9 wt%, the mass content of the ultraviolet photoisomerization chiral compound is 0.05 wt% to 10 wt%, and the mass content of the accelerator is 0.05 wt% to 2 wt%.
According to one aspect of the invention, the ultraviolet photoisomerization chiral compound comprises a first handedness, and the ultraviolet photoisomerization chiral compound comprises a second handedness after being irradiated by ultraviolet light.
According to one aspect of the invention, the ultraviolet photoisomerization chiral compound is chiral spiroalkene, chiral diarylethene and the like.
According to one aspect of the invention, the liquid crystal cell comprises a first transparent conductive substrate and a second transparent conductive substrate.
According to one aspect of the present invention, the first transparent conductive substrate and the second transparent conductive substrate are flexible substrates or common substrates.
According to one aspect of the invention, the mixture is poured into the cell by ink-jet printing or roll-to-roll bonding.
The invention discloses a circular polarization modulation device which is characterized by comprising a first transparent conductive substrate; a second transparent conductive substrate disposed in a box with respect to the first transparent conductive substrate; the first electrode is adjacently arranged on one side, close to the second transparent conductive substrate, of the first transparent conductive substrate; the second electrode is adjacently arranged on one side, close to the first transparent conductive substrate, of the second transparent conductive substrate; and a mixed liquid crystal layer disposed between the first transparent conductive substrate and the second transparent conductive substrate.
According to one aspect of the present invention, the mixed liquid crystal layer comprises a liquid crystalline epoxy monomer, a liquid crystalline thiol crosslinker, a negative liquid crystal, an ultraviolet photo-isomerisable chiral compound and an accelerator.
According to one aspect of the invention, the mass content of the liquid crystalline epoxy monomer is 0.5 wt% to 15 wt%, the mass content of the liquid crystalline thiol crosslinking agent is 0.5 wt% to 15 wt%, the mass content of the negative liquid crystal is 65 wt% to 98.9 wt%, the mass content of the ultraviolet photoisomerization chiral compound is 0.05 wt% to 10 wt%, and the mass content of the accelerator is 0.05 wt% to 2 wt%.
The invention orients the liquid crystal molecules by applying an external electric field, does not need additional alignment treatment, has simple process and saves cost. The ultraviolet light induces the chiral inversion of the chiral compound to realize the partition of the left-handed and right-handed liquid crystals, so that the electrode does not need to be patterned, and the manufacturing process is simplified. Due to the addition of the high polymer material, the liquid crystal circularly polarized light modulator can be made of a flexible film material, thereby being beneficial to realizing large-area roll-to-roll processing and reducing the transportation cost of devices.
[ description of the drawings ]
Fig. 1 to 4 are schematic flow charts of a method for manufacturing a circular polarization modulation device according to the present invention;
fig. 5 is a schematic structural diagram of a circular polarization modulation device according to the present invention.
[ detailed description ] embodiments
Fig. 1 to fig. 4 are schematic flow charts illustrating a method for manufacturing a circular polarization modulation device according to the present invention. As shown in fig. 1, a liquid crystalline epoxy monomer 51, a liquid crystalline thiol crosslinker 52, a negative liquid crystal 53, an ultraviolet photoisomerization chiral compound 54, and an accelerator 55 are mixed, and the mixture is poured into a liquid crystal cell. The liquid crystal cell includes a first transparent conductive substrate 10, a second transparent conductive substrate 20, a first electrode 30, and a second electrode 40.
As shown in fig. 2, an electric field is applied to the liquid crystal cell to induce alignment of the mixture according to the direction of the electric field. Because the induced cholesteric liquid crystal is in a plane orientation structure by applying an external electric field, additional alignment treatment is not needed, the manufacturing process is simple, and the cost is saved.
As shown in fig. 3, while applying an electric field, a mask 60 is used to irradiate ultraviolet light 70 on the liquid crystal cell in a partitioned manner to induce the chiral reversal of the ultraviolet photoisomerization chiral compound 54, so that the handedness of cholesteric liquid crystals in adjacent regions is reversed. The ultraviolet photoisomerization chiral compound 54 comprises a first handedness 81, and the ultraviolet photoisomerization chiral compound 54 comprises a second handedness 82 after being irradiated by ultraviolet light. Because the ultraviolet light induces the chiral reversal of the chiral compound to realize the partition of the left-handed and right-handed liquid crystals, the electrode does not need to be subjected to patterning treatment, and the whole common electrode can simplify the manufacturing process.
As shown in fig. 4, under the condition of an applied electric field and ultraviolet irradiation, the liquid crystal cell is heated by an electrothermal polymerization method to initiate a polymerization reaction between the liquid crystalline epoxy monomer 51 and the liquid crystalline thiol crosslinking agent 52, so that a rigid polymer network 90 is formed inside the liquid crystal to stabilize the planar structure and the helical structure of the cholesteric liquid crystal.
After the liquid crystalline epoxy monomer 51 and the liquid crystalline thiol crosslinking agent 52 are polymerized, the electric field, the ultraviolet light and the heating device are removed, and the circularly polarized light modulator disclosed by the invention is obtained.
In one embodiment, the mass content of the liquid crystalline epoxy monomer is 0.5 wt% to 15 wt%, the mass content of the liquid crystalline thiol crosslinking agent is 0.5 wt% to 15 wt%, the mass content of the negative liquid crystal is 65 wt% to 98.9 wt%, the mass content of the ultraviolet photoisomerization chiral compound is 0.05 wt% to 10 wt%, and the mass content of the accelerator is 0.05 wt% to 2 wt%.
In one embodiment, the mass content of the liquid crystalline epoxy monomer is 10 wt% to 15 wt%, the mass content of the liquid crystalline thiol crosslinking agent is 0.5 wt% to 15 wt%, the mass content of the negative liquid crystal is 65 wt% to 95 wt%, the mass content of the ultraviolet photoisomerization chiral compound is 1 wt% to 10 wt%, and the mass content of the accelerator is 0.2 wt% to 2 wt%.
In one embodiment, the mass content of the liquid crystalline epoxy monomer is 0.5 wt% to 10 wt%, the mass content of the liquid crystalline thiol crosslinking agent is 0.5 wt% to 15 wt%, the mass content of the negative liquid crystal is 50 wt% to 98.9 wt%, the mass content of the ultraviolet photoisomerization chiral compound is 0.05 wt% to 20 wt%, and the mass content of the accelerator is 0.05 wt% to 2 wt%.
In one embodiment, the ultraviolet photoisomerization chiral compound is chiral spiroalkene, chiral diarylethene, or the like.
In an embodiment, the first transparent conductive substrate and the second transparent conductive substrate are flexible substrates or common substrates.
In one embodiment, the mixture is poured into the cell by ink jet printing or roll-to-roll bonding.
As shown in fig. 5, a circular polarization modulation device includes a first transparent conductive substrate 10, a second transparent conductive substrate 20 disposed in a cell with respect to the first transparent conductive substrate 10. A first electrode 30 disposed adjacent to one side of the first transparent conductive substrate 10 close to the second transparent conductive substrate 20, and a second electrode 40 disposed adjacent to one side of the second transparent conductive substrate 20 close to the first transparent conductive substrate 10. And a mixed liquid crystal layer 50 disposed between the first transparent conductive substrate 10 and the second transparent conductive substrate 20, wherein a rigid polymer network 90 is formed inside the liquid crystal to stabilize a planar structure and a helical structure of the cholesteric liquid crystal.
In one embodiment, the mixed liquid crystal layer 50 includes a liquid crystalline epoxy monomer 51, a liquid crystalline thiol crosslinker 52, a negative liquid crystal 53, an ultraviolet photo-isomerisable chiral compound 54 and an accelerator 55.
In one embodiment, the mass content of the liquid crystalline epoxy monomer is 0.5 wt% to 15 wt%, the mass content of the liquid crystalline thiol crosslinking agent is 0.5 wt% to 15 wt%, the mass content of the negative liquid crystal is 65 wt% to 98.9 wt%, the mass content of the ultraviolet photoisomerization chiral compound is 0.05 wt% to 10 wt%, and the mass content of the accelerator is 0.05 wt% to 2 wt%.
In one embodiment, the mass content of the liquid crystalline epoxy monomer is 10 wt% to 15 wt%, the mass content of the liquid crystalline thiol crosslinking agent is 0.5 wt% to 15 wt%, the mass content of the negative liquid crystal is 65 wt% to 95 wt%, the mass content of the ultraviolet photoisomerization chiral compound is 1 wt% to 10 wt%, and the mass content of the accelerator is 0.2 wt% to 2 wt%.
In one embodiment, the mass content of the liquid crystalline epoxy monomer is 0.5 wt% to 10 wt%, the mass content of the liquid crystalline thiol crosslinking agent is 0.5 wt% to 15 wt%, the mass content of the negative liquid crystal is 50 wt% to 98.9 wt%, the mass content of the ultraviolet photoisomerization chiral compound is 0.05 wt% to 20 wt%, and the mass content of the accelerator is 0.05 wt% to 2 wt%.
In one embodiment, the ultraviolet photoisomerization chiral compound is chiral spiroalkene, chiral diarylethene, or the like.
In an embodiment, the first transparent conductive substrate and the second transparent conductive substrate are flexible substrates or common substrates.
The foregoing is merely a preferred embodiment of the present disclosure, and it should be noted that modifications and refinements may be made by those skilled in the art without departing from the principle of the present disclosure, and these modifications and refinements should also be construed as the protection scope of the present disclosure.
Claims (10)
1. A method for preparing a circular polarization modulation device is characterized by comprising the following steps:
mixing a liquid crystalline epoxy monomer, a liquid crystalline thiol cross-linking agent, negative liquid crystal, an ultraviolet photoisomerization chiral compound and an accelerator, and pouring the mixture into a liquid crystal box;
applying an electric field to the liquid crystal cell to induce the mixture to assume a planar orientation;
irradiating ultraviolet light on the liquid crystal box by utilizing a photomask in a partition mode to induce the chiral inversion of the ultraviolet photoisomerization chiral compound; and
the cell is heated to initiate a polymerization reaction between the liquid crystalline epoxy monomer and the liquid crystalline thiol crosslinker to form a rigid polymer network.
2. The method for manufacturing a circularly polarizing modulator according to claim 1, wherein the liquid crystalline epoxy monomer is contained in an amount of 0.5 to 15 wt%, the liquid crystalline thiol crosslinking agent is contained in an amount of 0.5 to 15 wt%, the negative liquid crystal is contained in an amount of 65 to 98.9 wt%, the ultraviolet photoisomerization chiral compound is contained in an amount of 0.05 to 10 wt%, and the accelerator is contained in an amount of 0.05 to 2 wt%.
3. The method for manufacturing a circular polarization modulation device according to claim 1, wherein the ultraviolet photoisomeric chiral compound comprises a first handedness; and is
The ultraviolet photoisomerization chiral compound comprises a second rotation direction after being irradiated by ultraviolet light.
4. The method for manufacturing a circularly polarizing modulator according to claim 1, wherein the ultraviolet photoisomerization chiral compound is chiral spiroalkene, chiral diarylethene, or the like.
5. The method for manufacturing a circularly polarized light modulating device as claimed in claim 1, wherein the liquid crystal cell comprises a first transparent conductive substrate and a second transparent conductive substrate.
6. The method for manufacturing a circularly polarized light modulating device as claimed in claim 5, wherein the first transparent conductive substrate and the second transparent conductive substrate are flexible substrates or common substrates.
7. The method for manufacturing a circularly polarizing modulator according to claim 1, wherein the mixture is poured into the liquid crystal cell by an ink-jet printing method or roll-to-roll lamination.
8. A circularly polarized light modulating device, comprising:
a first transparent conductive substrate;
a second transparent conductive substrate disposed in a box with respect to the first transparent conductive substrate;
the first electrode is adjacently arranged on one side, close to the second transparent conductive substrate, of the first transparent conductive substrate;
the second electrode is adjacently arranged on one side, close to the first transparent conductive substrate, of the second transparent conductive substrate; and
a hybrid liquid crystal layer disposed between the first transparent conductive substrate and the second transparent conductive substrate.
9. The circular polarization modulation device according to claim 8, wherein the mixed liquid crystal layer comprises a liquid crystalline epoxy monomer, a liquid crystalline thiol crosslinker, a negative liquid crystal, an ultraviolet photo-isomerisable chiral compound and an accelerator.
10. The circularly polarizing modulator according to claim 9, wherein the liquid crystalline epoxy monomer is contained in an amount of 0.5 to 15 wt%, the liquid crystalline thiol crosslinking agent is contained in an amount of 0.5 to 15 wt%, the negative liquid crystal is contained in an amount of 65 to 98.9 wt%, the ultraviolet photoisomerization chiral compound is contained in an amount of 0.05 to 10 wt%, and the accelerator is contained in an amount of 0.05 to 2 wt%.
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