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WO2013085315A1 - Cellule de cristaux liquides - Google Patents

Cellule de cristaux liquides Download PDF

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Publication number
WO2013085315A1
WO2013085315A1 PCT/KR2012/010571 KR2012010571W WO2013085315A1 WO 2013085315 A1 WO2013085315 A1 WO 2013085315A1 KR 2012010571 W KR2012010571 W KR 2012010571W WO 2013085315 A1 WO2013085315 A1 WO 2013085315A1
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WIPO (PCT)
Prior art keywords
liquid crystal
compound
crystal cell
layer
weight
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PCT/KR2012/010571
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English (en)
Korean (ko)
Inventor
민성준
오동현
장준원
김경준
정혜원
박문수
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LG Chem Ltd
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LG Chem Ltd
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Application filed by LG Chem Ltd filed Critical LG Chem Ltd
Priority to JP2014545821A priority Critical patent/JP5839211B2/ja
Priority to CN201280060426.5A priority patent/CN103988121B/zh
Priority claimed from KR1020120141351A external-priority patent/KR101618396B1/ko
Publication of WO2013085315A1 publication Critical patent/WO2013085315A1/fr
Priority to US14/298,596 priority patent/US9588369B2/en
Priority to US14/298,570 priority patent/US9182624B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13731—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a field-induced phase transition
    • G02F1/13737—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a field-induced phase transition in liquid crystals doped with a pleochroic dye

Definitions

  • the present application relates to a liquid crystal cell, a method for manufacturing a liquid crystal cell, and a display device.
  • a display technology capable of protecting privacy is required.
  • a narrow viewing angle film in the technology traditionally used for the protection of privacy.
  • the display may be used at a narrow viewing angle by adding the film to the screen.
  • a technology capable of switching from a wide viewing angle to a narrow viewing angle by switching a cell embedded in a display such as Sharp's ECB cell or Hitachi's HAN cell is also known.
  • LCD etc. to which the so-called viewing angle image control (VIC) technique which has two viewing angles different from each other are applied (for example, patent document 1, 2, etc.) are known.
  • Patent Document 1 Korean Patent Publication No. 2011-0123538
  • Patent Document 2 Republic of Korea Patent Publication No. 2011-0078785
  • the present application provides a liquid crystal cell, a method for manufacturing a liquid crystal cell, and a display device.
  • An exemplary liquid crystal cell may include a polymer network and a region present in the network.
  • the region (hereinafter referred to as "liquid crystal region") may include a liquid crystal compound and an anisotropic dye.
  • the liquid crystal region may be dispersed in the network.
  • the liquid crystal cell may adjust a viewing angle or a light transmittance in a process of displaying a screen with a display element.
  • the display element may include, for example, a display panel and a polarizer. Any kind of display panel may be used, for example, an organic light emitting display (OLED) panel, an IPS (In-Plane Switching) liquid crystal panel, a vertical alignment (VA) liquid crystal panel, a twisted nematic (TN) liquid crystal panel, or the like.
  • OLED organic light emitting display
  • IPS In-Plane Switching liquid crystal panel
  • VA vertical alignment
  • TN twisted nematic
  • Liquid crystal panels and the like can be exemplified, but are not limited thereto.
  • the liquid crystal cell may be disposed on one surface of the display element, for example, at the outermost portion of the display device.
  • the liquid crystal cell in the polarizing plate included in the display element, the liquid crystal cell may be disposed such that at least one polarizing plate exists between the display panel and the liquid crystal cell.
  • the display device may include a liquid crystal cell 101, a polarizer 102, and a display panel 103 that are sequentially stacked.
  • the liquid crystal cell may control the viewing angle or the light transmittance of the display device in the above structure. For example, the viewing angle and / or light transmittance can be adjusted by adjusting the alignment of the liquid crystal compound and / or the anisotropic dye in the liquid crystal region according to the type of display panel.
  • the liquid crystal compound and / or anisotropic dye in the liquid crystal region of the liquid crystal cell may switch between a homogeneous alignment state and a homeotropic alignment state. While switching, the viewing angle or light transmittance can be adjusted.
  • the horizontal alignment and the vertical alignment mean a substantially horizontal or vertical alignment capable of adjusting a desired viewing angle or light transmittance.
  • the thickness direction retardation described below may exist in a predetermined range, and the surface direction retardation may exist in a predetermined range even in the vertical alignment state.
  • the liquid crystal compound and / or the anisotropic dye are in a horizontal alignment state, for example, light of the polarizing plate disposed between the display panel and the liquid crystal cell in the polarizing plate of the display element.
  • the liquid crystal compound and / or the anisotropic dye may be vertically aligned when the liquid crystal is present in a state of being horizontally aligned in a direction substantially parallel to the absorption axis and a voltage is applied.
  • the plane direction phase difference R in of the liquid crystal cell is, for example, 10 nm or more, 20 nm or more, 30 nm or more, 40 nm or more, or 50. at least 60 nm, at least 60 nm, at least 70 nm, at least 80 nm, at least 90 nm, at least 100 nm, at least 110 nm, at least 120 nm, at least 130 nm, or at least 140 nm.
  • the phase difference in the plane direction of the liquid crystal cell in a voltage-free state is 300 nm or less, 290 nm or less, 280 nm or less, 270 nm or less, 260 nm or less, 250 nm or less, 240 nm or less, 230 nm or less, 220 nm Or less, 210 nm or less, 200 nm or less, 190 nm or less, 180 nm or less, 170 nm or less, or 160 nm or less.
  • the thickness direction retardation (R th ) of the liquid crystal cell in the state in which the liquid crystal compound and / or the anisotropic dye are vertically aligned by voltage application is, for example, 10 nm or more, 20 nm or more, 30 nm or more, 40 It may be at least 50 nm, at least 50 nm, at least 60 nm, at least 70 nm, at least 80 nm, at least 90 nm, at least 100 nm, at least 110 nm, at least 120 nm, at least 130 nm, or at least 140 nm.
  • the phase difference in the thickness direction of the liquid crystal cell is 300 nm or less, 290 nm or less, 280 nm or less, 270 nm or less, 260 nm or less, 250 nm or less, 240 nm or less, 230 nm or less, 220 nm Or less, 210 nm or less, 200 nm or less, 190 nm or less, 180 nm or less, 170 nm or less, or about 160 nm or less.
  • plane direction phase difference R in is a numerical value calculated by the following formula 1
  • thickness direction phase difference R th is a numerical value calculated by the following formula (2).
  • n x , n y , n z and d denote refractive indexes in the in-plane slow axis direction of the liquid crystal layer of the liquid crystal cell, refractive indices in the in-plane fastening axis direction, and refractive indices and thicknesses in the thickness direction, respectively.
  • Each of the refractive indices may be, for example, a refractive index measured with respect to light having a wavelength of 550 nm.
  • the device can be implemented in the narrow viewing angle is implemented in the voltage application state.
  • phase difference according to the alignment state and each state of the liquid crystal compound and / or the anisotropic dye in the liquid crystal cell when voltage is applied or not applied may have a proper viewing angle and / or light transmittance control effect depending on the type of display element to which the liquid crystal cell is applied. It can be adjusted freely to be exerted.
  • the liquid crystal cell may include, for example, a polymer network and the liquid crystal region dispersed in the polymer network, and may include a liquid crystal region including a liquid crystal compound and an anisotropic dye.
  • liquid crystal region refers to a region containing a liquid crystal compound and an anisotropic dye, and may mean a region dispersed in the network in a phase-separated state from the orientation network.
  • 2 shows an exemplary liquid crystal cell, which includes a polymer network 1011 and a liquid crystal region 1012. In FIG. 2, the arrow in the liquid crystal region 1012 is a liquid crystal compound, and the ellipsoid is an anisotropic dye.
  • the liquid crystal compound of the polymer network and the liquid crystal region in the liquid crystal cell may satisfy the following Equation 3.
  • n p is the refractive index of the polymer network
  • n o is the ordinary refractive index of the liquid crystal compound
  • n e is the extraordinary refractive index of the liquid crystal compound
  • a is 0 ⁇ a ⁇ 0.5 Is a number that satisfies
  • the refractive index applied to the equation may be, for example, a refractive index measured for light having a wavelength of 550 nm.
  • the refractive index of the polymer network in Equation 3 may be the normal refractive index of the network.
  • a may be, for example, less than 0.4, less than 0.3, less than 0.2, less than 0.1, or 0.
  • the polymer network may also have a dielectric anisotropy of at least 3, at least 3.5 or at least 4. It is possible to maintain excellent driving voltage characteristics of the liquid crystal cell in the dielectric constant range.
  • the upper limit of the dielectric constant is not particularly limited and may be, for example, about 20 or less, about 15 or less, or about 10 or less.
  • the liquid crystal region dispersed in the polymer network contains a liquid crystal compound.
  • a liquid crystal compound any kind of compound may be used as long as it can be present in a phase-separated state in the polymer network and oriented by the polymer network.
  • a smectic liquid crystal compound, a nematic liquid crystal compound, or a cholesteric liquid crystal compound may be used as the liquid crystal compound.
  • the liquid crystal compound is not separated from the polymer network by phase separation, and may have a form in which an orientation may be changed when a voltage is applied from the outside.
  • the liquid crystal compound may be a compound having no polymerizable group or crosslinkable group.
  • a nematic liquid crystal compound may be used as the liquid crystal compound.
  • fills following formula 4 can be used, for example.
  • n o is the normal refractive index of the liquid crystal compound defined in Equation 3, for example, the refractive index in the uniaxial direction of the nematic liquid crystal compound
  • n e is the extraordinary index of the liquid crystal compound defined in Equation 3 refractive index
  • b is a number satisfying 0.1 ⁇ b ⁇ 1.
  • b may be 0.1 to 0.9, 0.1 to 0.7, 0.1 to 0.5, or 0.1 to 0.3 in another example.
  • Liquid crystal compounds also have a difference between an ideal dielectric constant ( ⁇ e , an extraordinary dielectric anisotropy) and a normal dielectric constant ( ⁇ o , an ordinary dielectric anisotropy, a uniaxial dielectric constant) of at least 3, at least 3.5, at least 4, at least 6, 8 or more or 10 or more. Having such a dielectric constant can provide a device having excellent driving voltage characteristics.
  • the difference in the dielectric constant is that the higher the numerical value, the more the device can exhibit appropriate characteristics, and its upper limit is not particularly limited.
  • the liquid crystal compound has an ideal dielectric constant ( ⁇ e , extraordinary dielectric anisotropy) of about 6 to 50, and a normal dielectric constant ( ⁇ o , ordinary dielectric anisotropy, dielectric constant in the uniaxial direction) of about 2.5 to 7 Phosphorus compounds can be used.
  • ⁇ e extraordinary dielectric anisotropy
  • ⁇ o normal dielectric constant
  • the liquid crystal region also includes an anisotropic dye.
  • the term “dye” may refer to a material capable of intensively absorbing and / or modifying light in at least part or the entire range within the visible light region, for example, in the 400 nm to 700 nm wavelength range, and the term “anisotropic Dye ”may mean a material capable of anisotropic absorption of light in at least part or the entire range of the visible light region.
  • the anisotropic dye has a dichroic ratio, that is, a value obtained by dividing the absorption of polarized light parallel to the long axis direction of the anisotropic dye by the absorption of polarized light parallel to the direction perpendicular to the long axis direction.
  • Dyes can be used.
  • the dye may satisfy the dichroic ratio at at least some of the wavelengths or at any one within the wavelength range of the visible region, for example, in the wavelength range of about 380 nm to 700 nm or about 400 nm to 700 nm.
  • the upper limit of the dichroic ratio may be, for example, about 20, 18, 16, or 14.
  • the kind of the anisotropic dye is not particularly limited, and for example, all kinds of dyes known to have properties as described above and can be oriented according to the orientation of the liquid crystal compound may be used.
  • the liquid crystal cell as described above may exhibit excellent transparency even in a state where no voltage is applied.
  • the liquid crystal cell may exhibit a light transmittance of 80% or more, 85% or more, 90% or more, or 95% or more in a voltage-free state.
  • the light transmittance may be a light transmittance for a visible light region, for example, a wavelength in the range of about 400 nm to 700 nm.
  • the polymeric network may be an orienting network of precursors comprising an orienting compound.
  • the term "orientation network of a precursor comprising an oriented compound” may mean, for example, a polymer network comprising a precursor comprising an oriented compound or a polymer network comprising the crosslinked or polymerized precursor.
  • the term "orientation compound” is, for example, aligned in a predetermined direction through irradiation of light or the like, and the adjacent liquid crystal compound is determined through an interaction such as anisotropic interaction in the aligned state. It can mean a compound that can be oriented in the direction.
  • the compound may be a monomolecular compound, a monomeric compound, an oligomeric compound, or a high molecular compound.
  • a photo-alignment compound can be used, for example.
  • the photo-alignment compound may refer to a compound which can be aligned in a predetermined direction by irradiation of light, for example, irradiation of linearly polarized light, to induce alignment of adjacent liquid crystal compounds.
  • the photoalignable compound may be a compound including a photosensitive moiety.
  • Various photo-alignment compounds that can be used for the alignment of the liquid crystal compound are known.
  • Photo-alignment compounds include, for example, compounds aligned by trans-cis photoisomerization; Compounds aligned by photo-destruction, such as chain scission or photo-oxidation; Compounds ordered by photocrosslinking or photopolymerization such as [2 + 2] addition cyclization ([2 + 2] cycloaddition), [4 + 4] addition cyclization or photodimerization; Compounds aligned by photo-Fries rearrangement or compounds aligned by ring opening / closure reaction may be used.
  • azo compounds or stilbenes such as sulfated diazo dyes or azo polymers
  • cyclobutane tetracarboxylic dianhydride cyclobutane-1,2,3,4-tetracarboxylic dianhydride
  • aromatic polysilane or polyester polystyrene or polyimide and the like
  • polystyrene or polyimide and the like can be exemplified.
  • a compound aligned by photocrosslinking or photopolymerization a cinnamate compound, a coumarin compound, a cinnanam compound, a tetrahydrophthalimide compound, a maleimide compound , Benzophenone compounds, diphenylacetylene compounds, compounds having chalconyl residues (hereinafter referred to as chalconyl compounds) or compounds having anthracenyl residues (hereinafter referred to as anthracenyl compounds) as photosensitive residues;
  • chalconyl compounds compounds having chalconyl residues
  • anthracenyl compounds compounds having anthracenyl residues
  • examples of the compounds aligned by the optical freeze rearrangement include aromatic compounds such as benzoate compounds, benzoamide compounds, and methacrylamidoaryl methacrylate compounds.
  • the compound aligned by the ring-opening / ring-closure reaction such as a spiropyran compound A [4 + 2] ⁇ electron system ([4 + 2] ⁇ electronic system), but may be exemplified by compounds such as sorting by a ring opening / ring-closure reaction of, without being limited thereto.
  • the photo-alignment compound may be a monomolecular compound, a monomeric compound, an oligomeric compound, or a high molecular compound, or may be in the form of a blend of the photo-alignment compound and the polymer.
  • the oligomeric or polymeric compound as described above may have a residue derived from the above-described photoalignable compound or a photosensitive residue described above in the main chain or in the side chain.
  • Polymers having residues or photosensitive residues derived from photo-alignment compounds or that can be mixed with the photo-alignment compounds include polynorbornene, polyolefins, polyarylates, polyacrylates, poly (meth) acrylates, poly Examples include mead, poly (amic acid), polymaleimide, polyacrylamide, polymethacrylamide, polyvinyl ether, polyvinyl ester, polystyrene, polysiloxane, polyacrylonitrile or polymethacrylonitrile It may be, but is not limited thereto.
  • Polymers that may be included in the oriented compound are typically polynorbornene cinnamates, polynorbornene alkoxy cinnamates, polynorbornene allylyloxy cinnamates, polynorbornene fluorinated cinnamates, polynorbornene chlorinated cinnamates or Polynorbornene discinnamate and the like can be exemplified, but is not limited thereto.
  • the oriented compound is a polymeric compound
  • the compound may have, for example, a number average molecular weight of about 10,000 g / mol to about 500,000 g / mol, but is not limited thereto.
  • the orientation compound is orientationally ordered, and the liquid crystal compound in the liquid crystal region may be present in the state oriented by the network in the state without voltage application.
  • the alignment compound may simply be included in the alignment network in the alignment state or crosslinked and / or polymerized in the alignment state to form the orientation network.
  • the oriented compound may include one or more crosslinkable or polymerizable functional groups to crosslink or polymerize to form an oriented network.
  • a crosslinkable or polymeric functional group the functional group which reacts by application of heat or irradiation of active energy rays, such as an ultraviolet-ray, can be used, for example.
  • Such functional groups include alkenyl groups such as hydroxy groups, carboxyl groups, vinyl groups or allyl groups, epoxy groups, oxetanyl groups, vinyl ether groups, cyano groups, acryloyl groups, methacryloyl groups, acryloyloxy groups or methacrylo Iloxy group and the like can be exemplified but is not limited thereto.
  • Such functional groups include, for example, functional groups capable of participating in a crosslinking or polymerization reaction by radical reaction or cationic reaction by heat or irradiation of active energy rays or under a basic environment. Such functional groups may be introduced into, for example, the main chain or side chain of the alignment compound.
  • the precursor forming the oriented network may further comprise a crosslinking agent.
  • the crosslinking agent may be added to control the afterimage or strength of the liquid crystal cell.
  • a crosslinking agent the compound which can implement
  • Various crosslinking agents which can implement a crosslinking structure are known according to a high molecular compound.
  • a crosslinking agent it is a polyhydric compound which has two or more functional groups, and isocyanate compound, an epoxy compound, an isothiocyanate compound, a vinyl ether compound, an alcohol, an amine compound, a thiol compound, a carboxylic acid compound, an aziridine compound, or a metal Chelating compounds and the like.
  • crosslinking agent capable of participating in a crosslinking reaction by irradiation of active energy rays such as ultraviolet rays
  • active energy rays such as ultraviolet rays
  • alkenyl groups such as vinyl or allyl groups, epoxy groups, oxetanyl groups, vinyl ether groups, acryloyl groups, methacryloyl groups
  • Compounds containing two or more acryloyloxy groups or methacryloyloxy groups may be used.
  • polyfunctional acrylate etc. can be illustrated typically.
  • trimethylolpropane tri (meth) acrylate pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) ) Acrylate, dipentaerythritol hexa (meth) acrylate, triglycerol di (meth) acrylate, tripropylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, pentaerythritol di (Meth) acrylate, 1,6-hexanediol di (meth) acrylate, glycerol di (meth) acrylate, tris [2- (acryloyloxy) ethyl] isocyanurate, urethane acrylate, glycerol 1 , 3-diglycerol di (meth) acrylate
  • the crosslinking agent may be included in an appropriate ratio in consideration of the degree of control and intensity of the afterimage, the phase separation characteristics of the liquid crystal region and the alignment network, the anchoring characteristics, the photosensitivity, the dielectric constant and the refractive index, and the like.
  • the precursor of the oriented network is 0.1 part by weight to 100 parts by weight, 5 parts by weight to 100 parts by weight, 10 parts by weight to 90 parts by weight, 10 parts by weight to 80 parts by weight, 10 parts by weight of 100 parts by weight of the orientation compound. It may comprise from about 70 parts by weight, about 10 parts by weight to about 60 parts by weight, or about 10 parts by weight to about 50 parts by weight of the crosslinking agent.
  • the proportion of the crosslinking agent may be changed depending on the kind of the crosslinking agent and the alignment compound used.
  • the unit weight part may mean a ratio of weight between components, unless otherwise specified.
  • Precursors of the oriented network may further comprise additives such as solvents, radical or cationic initiators, basic materials, other reactive compounds or surfactants capable of forming the network, if necessary.
  • the liquid crystal compound of the liquid crystal region in the liquid crystal cell is 100 parts by weight to 2,500 parts by weight, 100 parts by weight to 2,000 parts by weight, 100 parts by weight to 1,900 parts by weight, 100 parts by weight with respect to 100 parts by weight of the polymer network.
  • the ratio of the liquid crystal compound can be changed as necessary.
  • the anisotropic dye may be included in a ratio of about 0.01 parts by weight to about 5 parts by weight based on 100 parts by weight of the liquid crystal compound, but the ratio may be changed to an appropriate range as necessary.
  • the polymer network may be a polymer network including a polymerizable liquid crystal compound.
  • the liquid crystal cell may include an alignment layer adjacent to the liquid crystal layer.
  • the liquid crystal layer of the liquid crystal cell may be formed on one surface of the alignment layer.
  • 3 is an example of a liquid crystal cell including an alignment layer 301 and a liquid crystal layer formed on one surface of the alignment layer 301 and including a polymer network 1011 and a liquid crystal region 1012.
  • the liquid crystal compound in the liquid crystal region 1012 is represented by an arrow
  • the anisotropic dye is represented by an ellipsoid.
  • the polymerizable liquid crystal compound and / or the liquid crystal compound in the liquid crystal region forming the polymer network in the liquid crystal layer may exist in an aligned state by the alignment layer.
  • Such a liquid crystal cell may exhibit excellent transparency even in a state where no voltage is applied.
  • the alignment layer containing a photo-alignment compound can be used, for example.
  • the photo-alignment compound for example, an appropriate kind may be selected and used from the compound used for forming the alignment network.
  • the photo-orientation compound in the alignment layer may be present in an aligned state to have orientation.
  • the alignment layer may further include a compound having at least one functional group capable of reacting with a reactive compound, for example, the photoalignable compound.
  • the reactive compound may include, for example, two or more, two to ten, four to ten, or four to eight functional groups.
  • the functional group may also be reactive with a polymer network of the liquid crystal layer or a precursor for forming the network.
  • the reactive compound may be, for example, a reaction performed by the photo-alignment compound in the mixture to exhibit liquid crystal alignment in the process of irradiating light to the mixture to form the alignment layer or irradiating light to form the liquid crystal layer, For example, an additional reaction separate from the photocrosslinking or photopolymerization reaction can be induced.
  • Additional reactions may include crosslinking reactions between photoalignable compounds, crosslinking reactions between photoalignable compounds and reactive compounds or between polymeric networks and reactive compounds. Therefore, the reactive compound may be included in a state of reacting with the photo-alignment compound or the polymer network in the alignment layer.
  • Functional groups capable of reacting with the photo-alignment compound and / or the polymer network include, for example, functional groups including ethylenically unsaturated double bonds, which can be crosslinked with the photo-alignment compound and / or the polymer network by free radical reaction. Can be illustrated.
  • Specific examples of the functional group may include one kind or two or more kinds of alkenyl group, epoxy group, cyano group, carboxyl group, acryloyl group, or methacryloyl group.
  • the reactive compound may be a compound having one or more, two or more, two to ten, four to ten, or four to eight functional groups, and having a molecular weight or weight average molecular weight of 200 to 5,000 or 200 to 1,000. have. In the range of the number and molecular weight or the weight average molecular weight of the functional group, the compound may improve the durability of the liquid crystal cell by appropriately maintaining the additional reaction while maintaining the liquid crystal alignment of the photo-alignment compound.
  • Alkyl (meth) acrylates such as these; Hydroxyalkyl (meth) acrylates such as hydroxyethyl (meth) acrylate or hydroxypropyl (meth) acrylate; Alkoxyalkyl (meth) acrylates such as methoxyethyl (meth) acrylate and the like; Carboxyalkyl (meth) acrylates such as carboxyethyl (meth) acrylate; Trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythr
  • the alignment layer may include, for example, the reactive compound in a ratio of 10 parts by weight to 1,000 parts by weight or 25 parts by weight to 400 parts by weight with respect to 100 parts by weight of the photo-alignment compound. It is possible to maintain excellent adhesion and orientation with the base layer or the polymer network at this ratio.
  • the precursor forming the alignment layer may comprise a photoinitiator in addition to the photoalignable compound.
  • a photoinitiator for example, any one capable of inducing a free radical reaction by irradiation of light can be used without particular limitation.
  • a photoinitiator an alpha-hydroxy ketone compound, an alpha-amino ketone compound, a phenyl glyoxylate compound, an oxime ester compound, etc. can be illustrated,
  • an oxime ester compound can be used.
  • the proportion of photoinitiator in the precursor is not particularly limited and may be included to such an extent that an appropriate reaction can be induced.
  • the polymer network may be, for example, a network of precursors including the polymerizable liquid crystal compound.
  • the term "network of precursors comprising a polymerizable liquid crystal compound” may mean, for example, a polymer network comprising a crosslinked or polymerized polymerizable liquid crystal compound.
  • the term "polymerizable liquid crystal compound” may mean a compound containing a site capable of exhibiting liquid crystallinity, for example, a mesogen skeleton, and the like, and further including at least one polymerizable functional group.
  • the polymerizable liquid crystal compound may be polymerized to form a skeleton such as a main chain or side chain of the liquid crystal polymer in the polymer network.
  • the polymerizable liquid crystal compound may be a polyfunctional polymerizable liquid crystal compound, a monofunctional polymerizable liquid crystal compound or a mixture of the above.
  • polyfunctional polymerizable liquid crystal compound means two or more, 2 to 10, 2 to 8, 2 to 6, 2 to 5, 2 to 2 polymerizable functional groups in the liquid crystal compound.
  • the compound containing four, two to three, or two can be mentioned, and the term “monofunctional polymerizable liquid crystal compound” can mean the compound containing one polymerizable functional group among the said liquid crystal compounds.
  • the polymerizable liquid crystal compound may be, for example, a compound represented by the following Formula (1).
  • A is a single bond, -COO- or -OCO-
  • R 1 to R 10 are each independently hydrogen, halogen, alkyl group, alkoxy group, alkoxycarbonyl group, cyano group, nitro group, -OQP or A substituent of Formula 2 or a pair of two adjacent substituents of R 1 to R 5 or a pair of two adjacent substituents of R 6 to R 10 are connected to each other to form a benzene substituted with -OQP, wherein R 1 to At least one of R 10 is -OQP or a substituent of Formula 2 below, or at least one pair of two adjacent substituents of R 1 to R 5 or two adjacent substituents of R 6 to R 10 are connected to each other to form -OQP Form benzene substituted with Q, wherein Q is an alkylene group or an alkylidene group, and P is an alkenyl group, epoxy group, cyano group, carboxyl group, acryloyl group
  • B is a single bond, -COO- or -OCO-
  • R 11 to R 15 are each independently hydrogen, halogen, alkyl group, alkoxy group, alkoxycarbonyl group, cyano group, nitro group or -OQP, or A pair of adjacent two substituents of R 11 to R 15 are connected to each other to form a benzene substituted with -OQP, wherein at least one of R 11 to R 15 is -OQP or two adjacent ones of R 11 to R 15 The pair of substituents are connected to each other to form benzene substituted with -OQP, wherein Q is an alkylene group or an alkylidene group, and P is an alkenyl group, epoxy group, cyano group, carboxyl group, acryloyl group, methacrylo It is a polymerizable functional group, such as a diary, acryloyloxy group, or methacryloyloxy group.
  • adjacent two substituents may be linked to each other to form a benzene substituted with -OQP, which may mean that two adjacent substituents are connected to each other to form a naphthalene skeleton substituted with -OQP as a whole. .
  • single bond means a case where no separate atom is present in the moiety represented by A or B.
  • A is a single bond in Formula 1
  • benzene on both sides of A may be directly connected to form a biphenyl structure.
  • halogen in the formula (1) and (2) for example, chlorine, bromine or iodine and the like can be exemplified.
  • alkyl group means, for example, a straight or branched chain alkyl group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms or 1 to 4 carbon atoms, unless otherwise specified. Or a cycloalkyl group having, for example, 3 to 20 carbon atoms, 3 to 16 carbon atoms, or 4 to 12 carbon atoms.
  • the alkyl group may be optionally substituted by one or more substituents.
  • alkoxy group may refer to an alkoxy group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms or 1 to 4 carbon atoms, unless otherwise specified.
  • the alkoxy group may be linear, branched or cyclic.
  • the alkoxy group may be optionally substituted with one or more substituents.
  • alkylene group or “alkylidene group” may mean, for example, an alkylene group or an alkylidene group having 1 to 12 carbon atoms, 4 to 10 carbon atoms or 6 to 9 carbon atoms, unless otherwise specified.
  • the alkylene group or alkylidene group may be, for example, linear, branched or cyclic.
  • the alkylene group or alkylidene group may be optionally substituted by one or more substituents.
  • alkenyl group may mean, for example, an alkenyl group having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms, unless otherwise specified. .
  • the alkenyl group may be, for example, linear, branched or cyclic.
  • the alkenyl group may be optionally substituted by one or more substituents.
  • P is, for example, acryloyl group, methacryloyl group, acryloyloxy group or methacryloyloxy group; Acryloyloxy group or methacryloyloxy group; Or acryloyloxy group.
  • an alkyl group, an alkoxy group, an alkenyl group, an epoxy group, an oxo group, an oxetanyl group, a thiol group, a cyano group, a carboxyl group, acryloyl group, a methacryloyl group, Acryloyloxy group, methacryloyloxy group or an aryl group may be exemplified, but is not limited thereto.
  • At least one of -OQP or a residue of formula (2), which may be present in Formulas (1) and (2), may, for example, be present at a position of R 3 , R 8, or R 13 .
  • the substituents connected to each other to constitute benzene substituted with -OQP may be, for example, R 3 and R 4 or R 12 and R 13 .
  • substituents other than -OQP or residues of the formula (2) or substituents other than the substituents connected to each other to form benzene in the compound of the formula (1) or the formula (2) for example, hydrogen, halogen, straight chain of 1 to 4 carbon atoms Or an alkoxycarbonyl group including a branched alkyl group, a straight or branched alkoxy group having 1 to 4 carbon atoms, a cycloalkyl group having 4 to 12 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a cyano group or a nitro group, and in another example Alkoxycarbonyl group or cyano group including chlorine, a straight or branched chain alkyl group having 1 to 4 carbon atoms, a cycloalkyl group having 4 to 12 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a straight or branched chain alkoxy group having 1 to 4 carbon atoms Can be.
  • Precursors of the polymer network may, if necessary, add additives such as solvents, radical or cationic initiators capable of inducing polymerization of the polymerizable liquid crystal compound, basic substances, other reactive compounds or surfactants capable of forming a network, and the like. It can be included as.
  • the ratio of the polymer network in the liquid crystal layer of the liquid crystal cell is 0.5 to 200 parts by weight, 0.5 to 150 parts by weight, 0.5 to 100 parts by weight of the liquid crystal compound in the liquid crystal region. It may be about 1 to 100 parts by weight, 1 to 100 parts by weight, 5 to 100 parts by weight, 5 to 80 parts by weight, 5 to 60 parts by weight or 5 to 40 parts by weight.
  • the ratio can be changed as necessary.
  • the anisotropic dye may be included in a ratio of about 0.01 parts by weight to about 5 parts by weight based on 100 parts by weight of the liquid crystal compound, but the ratio may be changed to an appropriate range as necessary.
  • the liquid crystal cell may further include one or two or more base layers.
  • the liquid crystal layer may be formed on the surface of the substrate layer or between two or more substrate layers.
  • the liquid crystal cell further includes a base layer facing each other, and the liquid crystal layer may be present between the opposite base layer.
  • FIG. 4 shows an exemplary liquid crystal cell including a liquid crystal layer, which is present between the substrate layers 401A and 401B, which are spaced apart from each other at predetermined intervals, and which includes a polymer network 1011 and a liquid crystal region 1012. Indicates.
  • the liquid crystal compound is represented by an arrow in the liquid crystal region 1012
  • the anisotropic dye is represented by an ellipsoid.
  • a base material layer a well-known material can be used without a restriction
  • inorganic films, plastic films, etc. such as a glass film, a crystalline or amorphous silicon film, a quartz, or an Indium Tin Oxide (ITO) film, can be used.
  • the optically isotropic base material layer the optically anisotropic base material layer like a retardation layer, a polarizing plate, a color filter substrate, etc. can be used.
  • plastic substrate layer examples include triacetyl cellulose (TAC); COP (cyclo olefin copolymer) such as norbornene derivatives; Poly (methyl methacrylate); PC (polycarbonate); PE (polyethylene); PP (polypropylene); PVA (polyvinyl alcohol); DAC (diacetyl cellulose); Pac (Polyacrylate); PES (poly ether sulfone); PEEK (polyetheretherketon PPS (polyphenylsulfone), PEI (polyetherimide); PEN (polyethylenemaphthatlate); PET (polyethyleneterephtalate); PI (polyimide); PSF (polysulfone); PAR (polyarylate) or amorphous fluorine resin
  • the substrate layer may include a coating layer of a silicon compound such as gold, silver, silicon dioxide or silicon monoxide, or a coating layer such as an antireflection layer, if necessary.
  • An electrode layer may be included on the surface of the substrate layer, for example, the surface of the substrate layer on the liquid crystal layer side (for example, the substrate layer 401A or 401B in contact with the liquid crystal layer in FIG. 4).
  • a conductive polymer, a conductive metal, a conductive nanowire, or a metal oxide such as indium tin oxide (ITO), or the like, may be formed by depositing an electrode layer, which may be formed to have transparency.
  • ITO indium tin oxide
  • the liquid crystal cell may further include a polarizer disposed on one surface of the liquid crystal layer.
  • 5 shows an exemplary liquid crystal cell in which a polarizer 501 is disposed on one surface.
  • the liquid crystal compound is indicated by an arrow in the liquid crystal region 1012, and the anisotropic dye is indicated by an ellipsoid.
  • the polarizer 501 is disposed in contact with the liquid crystal layer, but for example, the substrate layer and / or the electrode layer described above may be present between the polarizer 501 and the liquid crystal layer as necessary. It may be.
  • the polarizing plate without particular limitation, for example, an absorption type polarizing plate such as a known polyvinyl alcohol polarizing plate may be used.
  • the alignment direction of the liquid crystal compound and / or the anisotropic dye which are horizontally aligned in the voltage-free state may be substantially parallel to the light absorption axis of the polarizing plate.
  • the present application also relates to a display device including the liquid crystal cell.
  • the display device may include a display element and a liquid crystal cell.
  • the liquid crystal cell may be disposed on one surface of the display element, for example, the outermost portion of the display device.
  • the display device may include at least one polarizer and a display panel, and at least one polarizer of the polarizer may be disposed between the display device and the liquid crystal cell. Details of the display device are as described above.
  • the display device may be manufactured by, for example, arranging the liquid crystal cell on one surface of the display element.
  • the present application also relates to a method of manufacturing the liquid crystal cell.
  • the manufacturing method of the liquid crystal cell may include irradiating light to the layer of the precursor of the liquid crystal layer containing the alignment network.
  • the layer of the precursor By irradiating the layer of the precursor with light, it is possible to induce the formation of a network by orientation, crosslinking and / or polymerization of the alignment compound and phase separation of the liquid crystal compound.
  • the precursor may comprise a precursor of the polymer network, a liquid crystal compound and an anisotropic dye.
  • the precursor of the polymer network may comprise an oriented compound, for example the photoalignable compound.
  • the precursor may form a polymer network, and the liquid crystal compound and the anisotropic dye may be phase-separated from the network to form the liquid crystal region in the process of forming the network.
  • a compound described above for example, a photo-alignment compound or a precursor compound capable of forming the compound can be used, and the same compounds as those described above can also be used as the liquid crystal compound and the anisotropic dye.
  • the precursor is a compound capable of forming a polymer network together with an orientation compound if necessary, and may suitably include the crosslinking agent described above.
  • the types and ratios of the alignment compound, the crosslinking agent, the liquid crystal compound, and the anisotropic dye may be equally applied.
  • polymer network and the liquid crystal compound formed by the precursor may satisfy Equations 3 and 4 described above.
  • the liquid crystal compound in the precursor 100 parts by weight to 2,500 parts by weight, 100 parts by weight to 2,000 parts by weight, 100 parts by weight to 1,900 parts by weight, 100 parts by weight to 1,800 parts by weight, 100 parts by weight to 1,700 with respect to 100 parts by weight of the precursor Parts by weight, 100 parts by weight to 1,600 parts by weight, 100 parts by weight to 1,500 parts by weight, 100 parts by weight to 1,400 parts by weight, 100 parts by weight to 1,300 parts by weight, 100 parts by weight to 1,200 parts by weight, 100 parts by weight to 1,100 parts by weight , 100 parts by weight to 1,000 parts by weight, 100 parts by weight to 900 parts by weight, 100 parts by weight to 800 parts by weight, 100 parts by weight to 700 parts by weight, 100 parts by weight to 600 parts by weight, 100 parts by weight to 500 parts by weight, 100 parts by weight It may be included in the ratio of about 400 parts by weight, 100 parts by weight to 300 parts by weight, or about 150 parts by weight to 250 parts by weight, but this may be appropriately changed as necessary. In addition, the
  • the precursor may further comprise a solvent if necessary.
  • the solvent is not particularly limited, and an appropriate kind may be selected from known solvents such as toluene, xylene, cyclopentanone or cyclohexanone, for example.
  • Precursors may further contain, for example, appropriate radicals or catalysts such as cationic initiators and amines, or other reactive compounds or surfactants capable of forming a network, in order to promote network formation reactions such as an oriented compound and / or a crosslinking agent. It may further include an additive.
  • appropriate radicals or catalysts such as cationic initiators and amines, or other reactive compounds or surfactants capable of forming a network, in order to promote network formation reactions such as an oriented compound and / or a crosslinking agent. It may further include an additive.
  • the layer of precursor may be formed by coating the precursor on a suitable substrate, for example the substrate layer.
  • the layer of precursor may be formed by conventional coating methods such as bar coating, comma coating, inkjet coating or spin coating, for example when the precursor is liquid.
  • the above-mentioned transparent electrode layer may be formed in the surface of the base material layer in which the precursor layer is formed, for example.
  • the layer can be irradiated with light. Irradiation of light can be performed, for example, when a precursor contains a solvent etc., after drying the formed layer under suitable conditions and making the solvent volatilize. Such drying may be performed, for example, at a temperature of about 80 ° C. to 130 ° C. for about 1 minute to 10 minutes, but is not limited thereto.
  • Irradiation of light may be performed so that the alignment compound included in the layer of the precursor can be aligned.
  • the alignment of the orienting compound can be performed using linearly polarized light.
  • the wavelength or intensity of the irradiated light can be selected to provide for proper alignment of the oriented compound.
  • oriented compounds for example photoalignable compounds, are aligned by visible or near ultraviolet light, although far ultraviolet or near infrared light may be used if necessary. have.
  • FIG. 6 is a diagram schematically illustrating a process of irradiating light to a layer 6011 of a precursor including a liquid crystal compound (arrow) and anisotropic dye which are formed on the substrate layer 6012 and isotropic.
  • irradiation of light may be performed at an isotropic transition temperature (T NI ) or higher temperature range of the liquid crystal compound.
  • the alignment compound is aligned in a state of orientation, and the liquid crystal compound and / or anisotropic dye dispersed therein are aligned in accordance with the alignment direction of the alignment compound, for example, to form a liquid crystal layer as shown in FIG. 2.
  • an appropriate heat application or exposure process may be performed before or after the light irradiation step or at the same time to further promote the formation of the polymer network.
  • the liquid crystal cell when the polymer network of the liquid crystal layer contains a polymerizable liquid crystal compound, the liquid crystal cell may be manufactured in a manner including, for example, irradiating light to a layer of a precursor of the liquid crystal layer formed on the alignment layer. have. By irradiating the layer of the precursor with light, for example, the polymerizable liquid crystal compound is polymerized to form a polymer network, and phase-separated from the polymer network of the liquid crystal compound to form a liquid crystal region.
  • the alignment layer may be formed by coating an alignment layer precursor including the photoalignment compound on a suitable substrate, for example, the substrate layer, and exposing the alignment layer to the photoalignment compound.
  • FIG. 7 schematically shows a process of forming the alignment layer 7071 by irradiating light to the precursor of the alignment layer formed on the base layer 7022.
  • the precursor of the alignment layer may include, for example, an appropriate amount of the reactive compound or initiator described above in addition to the photo-alignment compound, and may also include other additives such as a surfactant if necessary.
  • the layer of the precursor of the alignment layer can be formed, for example, by coating the precursor in a conventional coating manner such as bar coating, comma coating, inkjet coating or spin coating.
  • the above-mentioned transparent electrode layer may be formed in the surface of the base material layer in which the precursor layer is formed, for example.
  • the layer can be irradiated with light. Irradiation of light can be performed, for example, when a precursor contains a solvent etc., after drying the formed layer under suitable conditions and making the solvent volatilize. Such drying may be performed, for example, at a temperature of about 60 ° C. to 130 ° C. for about 1 minute to 5 minutes, but is not limited thereto.
  • Irradiation of light may be performed so that the alignment compound included in the layer of the precursor can be aligned.
  • the alignment of the orienting compound can be performed using linearly polarized light.
  • the wavelength or intensity of the irradiated light can be selected to provide for proper alignment of the oriented compound.
  • photoalignable compounds are aligned by visible or near ultraviolet light, but far ultraviolet or near infrared light may be used if necessary.
  • FIG. 8 schematically illustrates a process of forming a liquid crystal layer including a polymer network 1011 and a liquid crystal region 1012 by irradiating light to a precursor of a liquid crystal layer present on the surface of the alignment layer 7011 formed in FIG. 7. Shows.
  • the precursor of the liquid crystal layer can be produced by, for example, dissolving the polymerizable liquid crystal compound, the liquid crystal compound in which the liquid crystal region is formed, anisotropic dye and other necessary additives (for example, an initiator) in an appropriate solvent.
  • a known solvent such as toluene, xylene, cyclopentanone or cyclohexanone can be used.
  • the precursor of the liquid crystal layer may be, for example, 1 part by weight to 60 parts by weight of the polymerizable liquid crystal compound and 40 parts by weight to 100 parts by weight of the liquid crystal compound or 5 parts by weight to 50 parts by weight of the polymerizable liquid crystal compound and 5 parts by weight of the liquid crystal compound.
  • the anisotropic dye may be included in the precursor in a ratio of about 0.01 parts by weight to about 5 parts by weight based on 100 parts by weight of the liquid crystal compound, but the ratio may also be changed to an appropriate range as necessary.
  • the layer can be irradiated with light.
  • the polymer network and the liquid crystal region may be formed through irradiation of light.
  • light irradiation may be performed after the formed layer is dried under appropriate conditions to volatilize the solvent. Irradiation of light can also be performed in the state where the said liquid crystal compound is orientated by the adjacent alignment layer.
  • the drying and / or alignment of the liquid crystal compound may be performed by maintaining the precursor layer at a temperature of about 80 ° C. to 130 ° C. for about 1 minute to 10 minutes, but is not limited thereto.
  • the conditions for irradiation of light are not particularly limited as long as the polymerizable liquid crystal compound is polymerized to form a polymer network and the liquid crystal compound is phase separated to form a liquid crystal region.
  • the polymerizable liquid crystal compound may be polymerized in the state oriented by the alignment layer through irradiation of light to form a polymer network, and a liquid crystal region including the liquid crystal compound may be formed therein. If necessary, an appropriate heat application or exposure process may be performed before or after the light irradiation step or at the same time to further promote the formation of the polymer network.
  • an additional substrate layer for example, a substrate layer having a transparent electrode layer formed on the surface, may be attached to the liquid crystal layer formed if necessary.
  • the manufacturing process of the liquid crystal cell as described above may be continuously performed by, for example, a roll to roll method.
  • the liquid crystal cell formed in this manner may be disposed on one surface of the display device to manufacture the display device.
  • the method for arranging the liquid crystal cell on one surface of the display element is not particularly limited.
  • the prepared liquid crystal cell may be attached to a display panel, a polarizing plate, or the like using an appropriate adhesive or an adhesive.
  • the manufacturing method of the display device may further include a process of attaching a polarizing plate or a process of arranging a light source, and the method of performing such a process is not particularly limited, and a known method may be applied.
  • the exemplary liquid crystal cell may be applied to various types of display devices to adjust the viewing angle or light transmittance of the display device.
  • FIG. 1 shows an exemplary display device.
  • 6 to 8 show an exemplary method of manufacturing a liquid crystal cell.
  • FIG. 9 is a view illustrating luminance variation of each inclination angle measured at an azimuth angle of 45 degrees with respect to the display device to which the liquid crystal cell according to the embodiment is applied.
  • liquid crystal cell will be described in detail with reference to Examples, but the range of the liquid crystal cell is not limited by the following examples.
  • PNBCi Polynorbornene
  • the precursor was coated on the electrode layer of the polycarbonate film having one surface of the ITO electrode layer, and an alignment layer was formed by irradiating linearly polarized ultraviolet (1,200 mJ / cm 2 ) through a WGP (Wire Grid Polarizer).
  • a polymerizable liquid crystal compound of Formula 4 (RM257, manufactured by Merck) and a liquid crystal compound (ZGS-8017, JNC, normal refractive index: 1.487, abnormal refractive index: 1.597) to form a liquid crystal region were mixed at a weight ratio of 1: 5.
  • the trade names were AB3 (Germany, manufactured by Nematel, Ltd., dichroic ratio for light at a wavelength of 643 nm: 12.8), AG1 (Germany, manufactured by Nematel Corporation, 463 nm, respectively).
  • the photoinitiator (Igacure 907) was blended based on the polymerizable liquid crystal compound, and 0.4% by weight of the ball spacer (ball spacer, manufactured by hypersil, about 2.5 ⁇ m in diameter) was then mixed at about 90 ° C.
  • Heat treatment was performed for about 5 minutes to prepare a uniform solvent-free solution (precursor). Thereafter, the precursor was coated on the alignment layer. Thereafter, a sealant was formed on the edge of the substrate layer, and the ITO electrode layer of another polycarbonate film on which the ITO electrode layer was formed was covered with the precursor layer and passed through the laminator.
  • ultraviolet rays (30 mW / cm 2 ) linearly polarized in a direction parallel to the alignment axis of the polymerizable liquid crystal compound and the liquid crystal compound were irradiated to the laminate for about 20 seconds to form a polymer network and a liquid crystal region.
  • the refractive index of the polymer network measured using the prism coupler was about 1.563.
  • the viewing angle control efficiency using the liquid crystal cell prepared in Example was measured. Specifically, the liquid crystal cell is attached to an outer polarizing plate of a liquid crystal panel of a conventional transverse electric field type including a polarizing plate disposed on both sides, and the alignment direction in the voltage-free state of the liquid crystal compound and anisotropic dye in the liquid crystal region of the liquid crystal cell It adhere

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Abstract

La présente invention concerne une cellule de cristaux liquides, un procédé de fabrication et un dispositif d'affichage d'une cellule de cristaux liquides. Un mode de réalisation de la cellule de cristaux liquides est appliqué au dispositif d'affichage et peut commander l'angle de vue ou l'émission lumineuse du dispositif d'affichage.
PCT/KR2012/010571 2011-12-06 2012-12-06 Cellule de cristaux liquides Ceased WO2013085315A1 (fr)

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CN201280060426.5A CN103988121B (zh) 2011-12-06 2012-12-06 液晶单元
US14/298,596 US9588369B2 (en) 2011-12-06 2014-06-06 Liquid crystal cell
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WO2017034338A1 (fr) * 2015-08-25 2017-03-02 주식회사 엘지화학 Cellule à cristaux liquides
KR20170090236A (ko) * 2016-01-28 2017-08-07 주식회사 엘지화학 액정셀
KR101883333B1 (ko) 2015-01-22 2018-07-30 주식회사 엘지화학 액정 조성물

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US9840668B2 (en) * 2012-12-14 2017-12-12 Lg Chem, Ltd. Liquid crystal device
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KR102039976B1 (ko) * 2016-01-28 2019-11-05 주식회사 엘지화학 액정셀

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