WO2014206049A1 - 聚合物分散液晶膜及其制备方法和包含其的显示装置 - Google Patents
聚合物分散液晶膜及其制备方法和包含其的显示装置 Download PDFInfo
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- WO2014206049A1 WO2014206049A1 PCT/CN2013/090546 CN2013090546W WO2014206049A1 WO 2014206049 A1 WO2014206049 A1 WO 2014206049A1 CN 2013090546 W CN2013090546 W CN 2013090546W WO 2014206049 A1 WO2014206049 A1 WO 2014206049A1
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- Prior art keywords
- liquid crystal
- transparent conductive
- conductive film
- substrate
- polymer
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- 239000004983 Polymer Dispersed Liquid Crystal Substances 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 118
- 239000000758 substrate Substances 0.000 claims abstract description 85
- 229920000642 polymer Polymers 0.000 claims abstract description 40
- 239000000178 monomer Substances 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 3
- 239000005264 High molar mass liquid crystal Substances 0.000 claims 1
- 239000010409 thin film Substances 0.000 abstract 6
- 239000004975 biaxial nematic Substances 0.000 abstract 3
- 239000010408 film Substances 0.000 abstract 3
- 239000004985 Discotic Liquid Crystal Substance Substances 0.000 description 17
- 230000005684 electric field Effects 0.000 description 15
- 239000005268 rod-like liquid crystal Substances 0.000 description 10
- 239000008240 homogeneous mixture Substances 0.000 description 9
- 238000002834 transmittance Methods 0.000 description 6
- 238000000151 deposition Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- CYLQSAOHCROMNO-UHFFFAOYSA-N CCCCCCCCCCC(CCOC(=O)C=C)CC(C)(CCCCCCCCCC)CCCCCCCCCC Chemical compound CCCCCCCCCCC(CCOC(=O)C=C)CC(C)(CCCCCCCCCC)CCCCCCCCCC CYLQSAOHCROMNO-UHFFFAOYSA-N 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- OKKQVRHLNHSUOR-UHFFFAOYSA-N OC1(CCCCC1)C1=C(C(C2=CC3=CC=CC=C3C2=C1)=O)C1=CC=CC=C1 Chemical compound OC1(CCCCC1)C1=C(C(C2=CC3=CC=CC=C3C2=C1)=O)C1=CC=CC=C1 OKKQVRHLNHSUOR-UHFFFAOYSA-N 0.000 description 2
- 239000004815 dispersion polymer Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- -1 1-hydroxycyclohexylphenyl group Chemical group 0.000 description 1
- 229920002799 BoPET Polymers 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- RJGDLRCDCYRQOQ-UHFFFAOYSA-N anthrone Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3CC2=C1 RJGDLRCDCYRQOQ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920000891 common polymer Polymers 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
-
- 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
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
-
- 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
-
- 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
-
- 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
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
- C09K2019/121—Compounds containing phenylene-1,4-diyl (-Ph-)
- C09K2019/123—Ph-Ph-Ph
-
- 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
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/20—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
- C09K19/2007—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers the chain containing -COO- or -OCO- groups
- C09K2019/2042—Ph-Ph-COO-Ph
Definitions
- Embodiments of the present invention relate to a polymer dispersed liquid crystal film, a method of preparing the same, and a display device including the same. Background technique
- Polymer Dispersed Liquid Crystal is a method in which a low molecular liquid crystal is mixed with a low molecular prepolymer to polymerize a low molecular prepolymer under certain conditions to form a high molecular polymer. It is dispersed in a high molecular polymer, and a material having electrooptic response characteristics is obtained by using dielectric anisotropy of liquid crystal, and a polarizing plate is not required.
- the optical properties of the PDLC film largely depend on the matching of the effective refractive index of the liquid crystal with the high molecular polymer.
- the PDLC film in the prior art only includes the uniaxial column phase liquid crystal, the degree of scattering of the PDLC film is not ideal when the power is not energized, thereby reducing the contrast of the PDLC film and reducing the user experience.
- embodiments of the present invention provide a polymer dispersed liquid crystal film having an improved PDLC film contrast ratio.
- a polymer dispersed liquid crystal film comprising: a first substrate and a second substrate disposed opposite to each other, respectively disposed on opposite sides of the first substrate and the second substrate a first transparent conductive film and a second transparent conductive film, and a polymer dispersed liquid crystal layer between the first transparent conductive film and the second transparent conductive film, wherein the polymer dispersed liquid crystal layer comprises a uniform distribution Biaxial liquid crystal and high molecular polymer.
- the biaxial liquid crystals are disorderly arranged, and the biaxial liquid crystal has a refractive index in a short axis direction and a refraction in a long axis direction Rate, the refractive index in the short-axis direction and the refractive index in the long-axis direction are not equal and do not match The refractive index of the high molecular polymer.
- the biaxial liquid crystal is composed of a rod-like liquid crystal and a discotic liquid crystal, and the mass ratio of the rod-like liquid crystal to the discotic liquid crystal is between 1:1 and 5:3.
- the mass ratio of the rod-like liquid crystal to the discotic liquid crystal may be 5:4.
- the polymer dispersed liquid crystal film further includes a first alignment layer disposed on a side of the first transparent conductive film facing the biaxial liquid crystal layer, and/or disposed on the second transparent conductive layer The film faces the second alignment layer on one side of the biaxial liquid crystal layer.
- a method of preparing a polymer dispersed liquid crystal film comprising:
- first transparent conductive film and a second transparent conductive film Forming a first transparent conductive film and a second transparent conductive film on one side of the first substrate and one side of the second substrate;
- the polymer dispersed liquid crystal layer includes a uniformly distributed biaxial liquid crystal and a high molecular polymer.
- the polymer dispersed liquid crystal layer is formed between the first substrate and the second substrate such that the polymer dispersed liquid crystal layer is directly located on the first transparent conductive film and the second transparent Between the conductive films, wherein the polymer dispersed liquid crystal layer comprises a uniformly distributed biaxial liquid crystal and a high molecular polymer comprising:
- a uniform mixture of a biaxial liquid crystal, a polymerizable monomer and a photoinitiator is dropped onto the first transparent conductive film or the second transparent conductive film;
- first substrate and the second substrate into a box such that the uniform mixture is directly between the first transparent conductive film and the second transparent conductive film; and forming a high molecular polymer to form The polymer disperses a liquid crystal layer.
- the polymer dispersed liquid crystal layer is formed between the first substrate and the second substrate such that the polymer dispersed liquid crystal layer is directly located on the first transparent conductive film and the second Between the transparent conductive films, wherein the polymer dispersed liquid crystal layer comprises a uniformly distributed biaxial liquid crystal and a high molecular polymer comprising: The first substrate and the second substrate are paired with the first transparent conductive film and the second transparent conductive film directly opposite each other;
- a uniform mixture of a biaxial liquid crystal, a polymerizable monomer, and a photoinitiator is poured on the first substrate or the second substrate; and a high molecular polymer is formed to form the polymer dispersed liquid crystal layer.
- the method before the forming a polymer dispersed liquid crystal layer between the first substrate and the second substrate, the method further comprises:
- the method before the forming a polymer dispersed liquid crystal layer between the first substrate and the second substrate, the method further includes:
- the rod-shaped liquid crystal is mixed with the discotic liquid crystal at a mass ratio of 1 : 1 to 5:3 to form a biaxial liquid ⁇
- a display device comprising the polymer dispersed liquid crystal film as described above or produced according to the above method.
- FIG. 1 is a schematic structural view of a polymer dispersed liquid crystal film according to an embodiment of the present invention
- FIG. 2 is a schematic structural view of a polymer dispersed liquid crystal film according to an embodiment of the present invention
- FIG. 3 is a polymer dispersion in an embodiment of the present invention
- 3 is a schematic structural view of a polymer dispersed liquid crystal film according to an embodiment of the present invention
- FIG. 5 is a flow chart 1 of a method for preparing a polymer dispersed liquid crystal film according to an embodiment of the present invention
- FIG. 7 is a third flowchart of a method for preparing a polymer dispersed liquid crystal film according to an embodiment of the present invention. Description of the reference signs:
- 1 a first substrate; 2 - a second substrate; 3 - a first transparent conductive film;
- a polymer dispersed liquid crystal film including a first substrate 1 and a second substrate 2 disposed opposite to each other is disposed on the first substrate 1 a first transparent conductive film 3 and a second transparent conductive film 4 on a surface opposite to the second substrate 2 and a polymer dispersion between the first transparent conductive film 3 and the second transparent conductive film 4 Liquid crystal layer 5.
- the polymer dispersed liquid crystal layer 5 includes a uniformly distributed biaxial liquid crystal 51 and a high molecular polymer 52. When no voltage is applied between the first transparent conductive film 3 and the second transparent conductive film 4, the biaxial liquid crystals 51 are arranged in disorder.
- the biaxial liquid crystal 51 has a refractive index in a short axis direction and a refractive index in a long axis direction, and the refractive index in the short axis direction and the refractive index in the long axis direction are not equal and do not match the refractive index of the polymer. .
- the biaxial liquid crystal 51 contained in the polymer dispersed liquid crystal layer is referred to as a biaxial column liquid crystal.
- the biaxial liquid crystal 51 includes two mutually perpendicular pointing axes, which are referred to as a short axis 511 and a long axis 512, respectively.
- the short axis 511 and the long axis 512 have a refractive index in the short axis direction and a refractive index n 2 in the long axis direction, respectively, and ⁇ .
- the short-axis direction refractive index 1 ⁇ and the long-axis direction refractive index n 2 do not match the refractive index n p of the high molecular polymer, that is, ⁇ ⁇ n 2 ⁇ n p .
- the biaxial liquid crystals 51 are arranged in an disorderly manner. Moreover, due to the short axis direction refractive index! And the refractive index n 2 in the long axis direction are not equal and do not match the refractive index n p of the high molecular polymer, compared with the polymer dispersed liquid crystal layer in the prior art, in the embodiment of the present invention
- the polymer dispersed liquid crystal layer has a stronger ability to scatter light, has a lower light transmittance, improves the contrast of the polymer dispersed liquid crystal film, and improves the user experience.
- the short axis 511 of the biaxial liquid crystal 51 Parallel to the direction of the electric field lines in the polymer dispersed liquid crystal layer 5, the long axis 512 of the biaxial liquid crystal 51 is randomly arranged perpendicular to the short axis, that is, perpendicular to the direction of the electric field lines.
- the refractive index ⁇ of the biaxial liquid crystal 51 in the short-axis direction matches the refractive index n p of the high molecular polymer, that is, the refractive index n 2 ⁇ n p in the long-axis direction, that is, the polymer dispersed liquid crystal layer 5 remains
- the incident light is scattered, and its transmittance is still low, translucent or opaque.
- the minor axis 511 of the biaxial liquid crystal 51 is still parallel to the direction of the electric field lines in the polymer dispersed liquid crystal layer 5, the biaxial The long axis 512 of the liquid crystal 51 is perpendicular to the short axis 511 and both point in the same direction. As shown in FIG. 3, the long axis 512 of the biaxial liquid crystal 51 is directed to the left.
- the refractive index ⁇ in the short axis direction is matched to the refractive index n p of the high molecular polymer, and the refractive index n 2 in the long axis direction is also matched to the refractive index n p of the high molecular polymer.
- Polymer ⁇ The refractive index in the liquid crystal layer 5 is uniform, there is no obvious interface inside, the incident light does not scatter, and the polymer dispersed liquid crystal film can be penetrated, and the polymer dispersed liquid crystal film is transparent at this time.
- the biaxial liquid crystal 51 is composed of a rod-shaped liquid crystal 513 and a discotic liquid crystal 514, and the mass ratio of the rod-shaped liquid crystal 513 and the discotic liquid crystal 514 is between 1:1 and 5:3, wherein the biaxial liquid crystal
- the short axis 511 of 51 is the pointing axis of the rod-shaped liquid crystal 513
- the long axis 512 of the biaxial liquid crystal 51 is the pointing axis of the disk-shaped liquid crystal 514.
- a biaxial liquid crystal 51 having a short-axis direction refractive index ⁇ and a long-axis direction refractive index n 2 is obtained .
- the rod-like liquid crystal 513 has a molecular form of a rod
- the discotic liquid crystal 514 has a molecular form of a disk.
- the mass ratio of the rod-shaped liquid crystal 513 to the discotic liquid crystal 514 is 1:1 to 5:3, for example, 5:4.
- the effect of the electric field may also be within the biaxial liquid crystal 51.
- the force between the rod-like liquid crystal 513 and the discotic liquid crystal 514 is broken, so that the rod-like liquid crystal 513 and the disc-shaped liquid crystal 514 cannot be continuously combined into a biaxial liquid crystal.
- the pointing axis of the rod-like liquid crystal 513 is parallel to the direction of the electric field in the polymer dispersed liquid crystal layer 5, and the pointing axis 512 of the discotic liquid crystal is also parallel to the polymerization.
- the liquid crystal layer 5 does not scatter inside, and the polymer dispersed liquid crystal film is transparent at this time.
- the polymer dispersed liquid crystal film further includes a first alignment layer 6 disposed on a side of the first transparent conductive film 3 facing the polymer dispersed liquid crystal layer 5, wherein
- the orientation direction of the first alignment layer 6 can be oriented according to the molecular characteristics of the biaxial liquid crystal 51 and the refractive index of the short axis direction and the refractive index n 2 of the long axis direction of the biaxial liquid crystal 51 to be obtained. Not limited.
- a second alignment layer 7 is provided on one side of the layer.
- first alignment layer 6 and the second alignment layer 7 may retain only one of them, as long as the short-axis direction refractive index ⁇ and the long-axis direction refractive index n 2 of the biaxial liquid crystal 51 can satisfy the requirements. Just fine.
- the first alignment layer 6 and/or the second alignment layer 7 By providing the first alignment layer 6 and/or the second alignment layer 7, and by controlling the mass ratio of the rod-shaped liquid crystal 513 and the disc-shaped liquid crystal 514 of the biaxial liquid crystal 51, it is more advantageous to obtain the required double under the mutual cooperation of the two.
- the short-axis refractive index ⁇ and the long-axis refractive index n 2 of the axial liquid crystal 51 are provided.
- the second transparent conductive film 4 can be grounded, and the first transparent conductive film 3 can be made only by supplying a suitable potential to the first transparent conductive film 3 without controlling the potential of the second transparent conductive film 4. Having a suitable voltage between the second transparent conductive film 4 and an electric field suitable for the electric field strength is obtained, so that the arrangement form of the biaxial liquid crystal 51 is appropriately changed.
- the high molecular polymer 52 may be a common polymer such as an epoxy resin or an acrylic resin.
- the polymer-dispersed liquid crystal film of the embodiment of the present invention comprises a uniformly distributed biaxial liquid crystal and a high molecular polymer in its polymer dispersed liquid crystal layer.
- the refractive index in the short-axis direction and the direction in the long-axis direction of the biaxial liquid crystal are not equal and do not match the refractive index of the polymer, and the ability to scatter light is stronger.
- the lower light transmittance improves the contrast of the polymer dispersed liquid crystal film and improves the user experience.
- the polymer dispersed liquid crystal film provided by the embodiments of the present invention can be used for liquid crystal display panels, optical modulators, heat sensitive and pressure sensitive devices, electronically controlled glass, light valves, projection displays, electronic books and the like.
- a method for preparing a polymer dispersed liquid crystal film comprising:
- Step S101 forming a first transparent conductive film and a second transparent conductive film on one side of the first substrate and one side of the second substrate;
- Step S102 forming a polymer dispersed liquid crystal layer between the first substrate and the second substrate, so that the polymer dispersed liquid crystal layer is directly located on the first transparent conductive film and the second transparent conductive film.
- the polymer dispersed liquid crystal layer comprises a uniformly distributed biaxial liquid crystal and a high molecular polymer
- the first transparent conductive film and the second transparent conductive film may be formed by, for example, coating, deposition or sputtering.
- step S102 can include:
- Step S201 injecting a uniform mixture of a biaxial liquid crystal, a polymerizable monomer and a photoinitiator onto the first transparent conductive film or the second transparent conductive film;
- Step S202 performing the pairing of the first substrate and the second substrate such that the first transparent conductive film and the second transparent conductive film are directly opposed, so that the uniform mixture is located Between the first and second transparent conductive films;
- Step S203 performing ultraviolet light irradiation to polymerize the polymerizable monomer in the presence of the photoinitiator to form a high molecular polymer to form the polymer dispersed liquid crystal layer.
- the mass fraction of the biaxial liquid crystal is preferably 80%, and the mass fraction of the polymerizable monomer is preferably 19% to 19.4. %, the mass fraction of the photoinitiator is preferably 0.6% to 1%, and wherein the polymerizable monomer may include a monomer such as an epoxy resin or an acrylic resin, and the photoinitiator may be selected from 1-hydroxycyclohexylphenyl group.
- Anthrone (referred to as HCPK);
- step S202 the first substrate and the second substrate are oppositely disposed such that the first transparent conductive film and the second transparent conductive film are directly opposed such that the first substrate and the first substrate Forming a polymer dispersed liquid crystal layer between the second substrates;
- step S203 the opposing first transparent conductive film and the second transparent conductive film are advantageous for forming an electric field parallel to the electric field lines in the polymer dispersed liquid crystal film.
- step S102 may include:
- Step S301 the first substrate and the second substrate are paired, such that the first transparent conductive film and the second transparent conductive film are directly opposite each other;
- Step S302 pouring a uniform mixture of the biaxial liquid crystal, the polymerizable monomer and the photoinitiator between the first substrate and the second substrate;
- Step S303 performing ultraviolet light irradiation to polymerize the polymerizable monomer in the presence of the photoinitiator to form a high molecular polymer to form the polymer dispersed liquid crystal layer.
- step S301 the first substrate and the second substrate are disposed opposite to each other such that the first transparent conductive film and the second transparent conductive film are directly opposed to each other, thereby facilitating formation of an electric field in the polymer dispersed liquid crystal film. a parallel electric field;
- the mass fraction of the biaxial liquid crystal is preferably 80%, and the mass fraction of the polymerizable monomer is preferably 19% to 19.4. %, the mass fraction of the photoinitiator is preferably 0.6% to 1%, and wherein the polymerizable monomer is A monomer including an epoxy resin or an acrylic resin, and a photoinitiator may be selected from 1-hydroxycyclohexylphenyl fluorenone (abbreviated as HCPK).
- HCPK 1-hydroxycyclohexylphenyl fluorenone
- the biaxial liquid crystal in the biaxial liquid crystal layer may include a rod-shaped liquid crystal and a discotic liquid crystal.
- the preparation method of the biaxial liquid crystal may specifically be: mixing a rod-like liquid crystal and a discotic liquid crystal at any ratio between a mass ratio of 1:1 to 5:3, for example, a rod shape at a mass ratio of 5:4.
- the liquid crystal and the discotic liquid crystal are mixed and stirred to form a biaxial liquid crystal, and the biaxial liquid crystal is defoamed.
- the method may further include:
- the rod-shaped liquid crystal is mixed with the discotic liquid crystal at a mass ratio of 1 : 1 to 5:3 to form a biaxial liquid ⁇
- the method may further include:
- the orientation direction of the first alignment layer 6 can be oriented according to the molecular characteristics of the biaxial liquid crystal 51 and the short-axis direction refractive index ⁇ and the long-axis direction refractive index n 2 of the biaxial liquid crystal 51 to be obtained. There is no limit here.
- the refractive index ⁇ in the short-axis direction and the refractive index n 2 in the long-axis direction of the biaxial liquid crystal 51 are not satisfactory, and the second transparent conductive film 4 may face the biaxial liquid crystal layer.
- the second alignment layer 7 is provided on one side.
- the preparation method of the polymer dispersed liquid crystal film provided by the embodiment of the invention has the advantages of simple operation and high yield. In the absence of an applied voltage, the polymer dispersed liquid crystal film produced has a high contrast ratio and improves the user experience.
- a display device comprising a polymer dispersed liquid crystal film prepared according to the method of the present invention or according to the method of the present invention, the display device may For: LCD panel, electronic paper, OLED panel, mobile phone, tablet, TV, monitor, laptop, digital photo frame, navigator, etc. Any product or component with display function.
- Example 1 is provided to further illustrate the invention. Those skilled in the art should understand that these examples are for illustrative purposes only and are not intended to limit the scope of the invention.
- Example 1 is provided to further illustrate the invention. Those skilled in the art should understand that these examples are for illustrative purposes only and are not intended to limit the scope of the invention.
- Example 1 is provided to further illustrate the invention. Those skilled in the art should understand that these examples are for illustrative purposes only and are not intended to limit the scope of the invention.
- the size of the glass in the substrate was 180 mm X 140 mm X 0.5 mm, and the thickness of the ITO film (i.e., transparent conductive film) thereon was 400 ⁇ .
- the first and second substrates of the cell and a homogeneous mixture therebetween were irradiated with ultraviolet light having a wavelength of 365 nm for 5 minutes at room temperature with a strength of 1.45 mW/cm 2 to cure the mixture to form a polymer dispersed liquid crystal layer.
- ultraviolet light having a wavelength of 365 nm for 5 minutes at room temperature with a strength of 1.45 mW/cm 2 to cure the mixture to form a polymer dispersed liquid crystal layer.
- a desired polymer dispersed liquid crystal film was obtained.
- a PET film having a size of 500 mm x 300 mm x 0.1 mm was used as the first and second substrates.
- An IZO film having a thickness of 500 ⁇ was coated thereon as the first and second transparent conductive films.
- the biaxial liquid crystal was uniformly mixed with 3,5,5-tridecylhexyl acrylate and HCPK in a mass ratio of 80:19.5:0.5.
- the first and second substrates are paired such that the first and second transparent conductive films are directly opposed to each other with a cell pitch of 10 ⁇ m.
- 10 g of the homogeneous mixture was poured between the first and second transparent conductive films such that the homogeneous mixture was directly located between and filled with the first and second transparent conductive films.
- the first and second substrates of the cell and a homogeneous mixture therebetween were irradiated with ultraviolet light having a wavelength of 365 nm for 5 minutes at room temperature with a strength of 1.45 mW/cm 2 to cure the mixture to form a polymer dispersed liquid crystal layer.
- ultraviolet light having a wavelength of 365 nm for 5 minutes at room temperature with a strength of 1.45 mW/cm 2 to cure the mixture to form a polymer dispersed liquid crystal layer.
- a desired polymer dispersed liquid crystal film was obtained.
- Example 3 Commercially available ITO glass was used as the first and second substrates each having the first and second transparent conductive films.
- the size of the glass in the substrate was 180 mm X 140 mm X 0.5 mm, and the thickness of the ITO film thereon was 400 angstroms.
- a polyimide layer having a thickness of 600 nm was printed on the first transparent conductive film of the first substrate. This layer was polymerized at 230 ° C for 20 minutes to form an alignment layer.
- the biaxial liquid crystal was uniformly mixed with 3,5,5-tridecylhexyl acrylate and HCPK in a mass ratio of 80: 19.5:0.5. 2 g of the homogeneous mixture was dropped on the second transparent conductive film of the second substrate. Subsequently, the first and second substrates are paired to a cell with a cell pitch of 10 ⁇ m. The homogeneous mixture is placed directly between and filled with the first and second transparent conductive films.
- the first and second substrates of the cell and a homogeneous mixture therebetween were irradiated with ultraviolet light at a wavelength of 365 nm for 5 minutes at room temperature with a strength of 1.45 mW/cm 2 to cure the mixture to form a polymer dispersed liquid crystal layer.
- a desired polymer dispersed liquid crystal film was obtained.
- a conventional polymer-dispersed liquid crystal film of Comparative Example 1 was prepared in the same manner as in Example 1, except that only 4-cyano-4,-pentyl-terphenyl was used as a liquid crystal component.
- a liquid crystal panel was produced using the polymer-dispersed liquid crystal films of Examples 1 to 3 and Comparative Example 1, respectively, and the transmittances in the scattering state and the transparent state were tested. The ratio of the scattering state transmittance to the transparent state transmittance is calculated and recorded as the contrast. The results are listed in Table 1 below. Contrast test results of liquid crystal panels comprising polymer dispersed liquid crystal films of the examples and comparative examples of the present invention
- the contrast of the display made using the polymer-dispersed liquid crystal film of the embodiment of the present invention is >100; and the contrast of the display made using the conventional polymer-dispersed liquid crystal film is only about 70. Therefore, when the consumer uses the display device including the polymer-dispersed liquid crystal film of the embodiment of the present invention, a better use experience can be obtained.
- the above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Accordingly, the scope of the invention should be determined by the scope of the appended claims.
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Abstract
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US14/378,223 US9239486B2 (en) | 2013-06-26 | 2013-12-26 | Polymer dispersed liquid crystal film, method of preparing the same, and display apparatus comprising the same |
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CN201310257881.0A CN103323973B (zh) | 2013-06-26 | 2013-06-26 | 聚合物分散液晶膜及其制备方法、显示装置 |
CN201310257881.0 | 2013-06-26 |
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CN103323973B (zh) * | 2013-06-26 | 2015-12-02 | 京东方科技集团股份有限公司 | 聚合物分散液晶膜及其制备方法、显示装置 |
CN107300726A (zh) * | 2017-07-17 | 2017-10-27 | 南方科技大学 | 一种全固态反射膜及其制备方法 |
Citations (6)
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US20030137624A1 (en) * | 2002-01-21 | 2003-07-24 | Seung-Gon Kang | Reflective liquid crystal display and projection system including the same |
CN101121887A (zh) * | 2007-08-15 | 2008-02-13 | 江苏森然化工有限公司 | 一种聚合物分散液晶薄膜的制备方法 |
CN102464983A (zh) * | 2010-11-12 | 2012-05-23 | 京东方科技集团股份有限公司 | 显示器、聚合物分散液晶膜及其制造方法和驱动方法 |
JP2012128001A (ja) * | 2010-12-13 | 2012-07-05 | Japan Display Central Co Ltd | 液晶表示装置 |
CN103033985A (zh) * | 2012-12-10 | 2013-04-10 | 京东方科技集团股份有限公司 | 一种液晶显示装置及其制备方法 |
CN103323973A (zh) * | 2013-06-26 | 2013-09-25 | 京东方科技集团股份有限公司 | 聚合物分散液晶膜及其制备方法、显示装置 |
-
2013
- 2013-06-26 CN CN201310257881.0A patent/CN103323973B/zh not_active Expired - Fee Related
- 2013-12-26 WO PCT/CN2013/090546 patent/WO2014206049A1/zh active Application Filing
- 2013-12-26 US US14/378,223 patent/US9239486B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030137624A1 (en) * | 2002-01-21 | 2003-07-24 | Seung-Gon Kang | Reflective liquid crystal display and projection system including the same |
CN101121887A (zh) * | 2007-08-15 | 2008-02-13 | 江苏森然化工有限公司 | 一种聚合物分散液晶薄膜的制备方法 |
CN102464983A (zh) * | 2010-11-12 | 2012-05-23 | 京东方科技集团股份有限公司 | 显示器、聚合物分散液晶膜及其制造方法和驱动方法 |
JP2012128001A (ja) * | 2010-12-13 | 2012-07-05 | Japan Display Central Co Ltd | 液晶表示装置 |
CN103033985A (zh) * | 2012-12-10 | 2013-04-10 | 京东方科技集团股份有限公司 | 一种液晶显示装置及其制备方法 |
CN103323973A (zh) * | 2013-06-26 | 2013-09-25 | 京东方科技集团股份有限公司 | 聚合物分散液晶膜及其制备方法、显示装置 |
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US9239486B2 (en) | 2016-01-19 |
CN103323973B (zh) | 2015-12-02 |
US20150338688A1 (en) | 2015-11-26 |
CN103323973A (zh) | 2013-09-25 |
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