WO2017164475A1 - Filtre coloré, son procédé de fabrication, et dispositif d'affichage le comprenant - Google Patents

Filtre coloré, son procédé de fabrication, et dispositif d'affichage le comprenant Download PDF

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Publication number
WO2017164475A1
WO2017164475A1 PCT/KR2016/011240 KR2016011240W WO2017164475A1 WO 2017164475 A1 WO2017164475 A1 WO 2017164475A1 KR 2016011240 W KR2016011240 W KR 2016011240W WO 2017164475 A1 WO2017164475 A1 WO 2017164475A1
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WIPO (PCT)
Prior art keywords
light
layer
color filter
region
quantum dot
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PCT/KR2016/011240
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English (en)
Inventor
Jiyun KWON
Obum KWON
Jonggi Kim
Jinseong PARK
Hojeong Paek
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Samsung Sdi Co., Ltd.
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Priority to CN201680069396.2A priority Critical patent/CN108292060A/zh
Publication of WO2017164475A1 publication Critical patent/WO2017164475A1/fr

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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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133617—Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/201—Filters in the form of arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G02B5/223—Absorbing filters containing organic substances, e.g. dyes, inks or pigments
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G02B5/281—Interference filters designed for the infrared light
    • G02B5/282—Interference filters designed for the infrared light reflecting for infrared and transparent for visible light, e.g. heat reflectors, laser protection
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
    • G02B6/29389—Bandpass filtering, e.g. 1x1 device rejecting or passing certain wavelengths
    • 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 
    • G02F1/015—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 semiconductor elements having potential barriers, e.g. having a PN or PIN junction
    • G02F1/017—Structures with periodic or quasi periodic potential variation, e.g. superlattices, quantum wells
    • G02F1/01791—Quantum boxes or quantum dots
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters

Definitions

  • a color filter, a making method using the same, and a display device including color filter are disclosed.
  • Quantum dots which are dispersed in a polymer host matrix to have a form of a composite, are applicable for the various display devices.
  • Quantum dots may be used as a light conversion layer in a light emitting diode (LED) or the like by dispersing in a host matrix of an inorganic material or a polymer.
  • LED light emitting diode
  • the particle size may be relatively freely controlled and also uniformly controlled.
  • quantum dot has a size of less than or equal to 10 nm, the quantum confinement effects in which the bandgap is more increased according to decreasing a size become significant, thus the energy density is enhanced.
  • quantum dot has a theoretical quantum efficiency (QY) of 100 % and may emit light having a high color purity (e.g., full width at half maximum (FWHM) of less than or equal to 40 nm), it may enhance a luminous efficiency and improve a color reproducibility. Therefore, if the quantum dots are patternable, they may be applied to various devices and when the quantum dots are used for a color filter for an LCD, high quality photoluminescent type LCD may be developed.
  • QY quantum efficiency
  • FWHM full width at half maximum
  • Another embodiment provides a method of making the color filter.
  • Yet another embodiment provides a display device having improved color reproducibility, color purity, and viewing angle characteristics by including the color filter.
  • a color filter is compartmentalized into a first region configured to emit first light, a second region configured to emit second light having longer wavelength than the first light, and a third region configured to emit third light having longer wavelength than the second light, and includes a substrate, and a first layer integrally provided with and on the second region and the third region and a second layer on the first layer in the substrate, wherein the first layer has a absorption rate of greater than or equal to 80 % for the first light and the second layer includes a quantum dot as a light-conversion material.
  • the first layer may fully absorb light in 420 nm to 460 nm wavelength region.
  • the first layer may have a transmittance of greater than or equal to 80 % for light in a wavelength region of greater than or equal to 540 nm.
  • a thickness of the first layer may be 0.1 ⁇ m to 5 ⁇ m and a width of the first layer may be 1 ⁇ m to 200 ⁇ m.
  • the first light of the first layer may be blue light; the second light may be green light; and the third light may be red light.
  • a transparent medium may be provided on the first region.
  • the quantum dot may include a Group II-VI compound, a Group III-V compound, a Group IV-VI compound, a Group IV compound, a Group II-III-VI compound, a Group I-II-IV-VI compound, or a combination thereof.
  • another embodiment provides a display device including the color filter, which includes a light source supplying a first light in a first direction; a first substrate disposed in a front side of the light source with reference to the first direction; a color filter disposed in a front side of the first substrate with reference to the first direction; and a second substrate disposed in a front side of the color filter with reference to the first direction, wherein the second layer is disposed in the front side of the first layer with reference to the first direction in the color filter.
  • the display device may further include a liquid crystal layer disposed between the first substrate and the color filter or between the color filter and the second substrate.
  • FIG. 3 is a view further specifically showing a path of first light radiated into the color filter of FIG. 2.
  • FIG. 6 is a graph showing a light transmittance of first light of the color filter according to an embodiment, depending upon a visible light wavelength region.
  • FIG. 7 is a graph showing a transmission spectrum of color filter according to an embodiment, for the visible wavelength region emitted from a green filter in the visible light wavelength region of.
  • FIG. 1 is a schematic view showing cross-talk preventing effects by a second layer in a color filter according to an embodiment.
  • a color filter 100 is a stacked structure including a first layer 10 and a second layer 20 formed on the first layer 10.
  • the second layer 20 includes quantum dots 11, and the quantum dots 11 are dispersed in the second layer 20.
  • the quantum dot 11 may emit radiation light in a radiation direction while quantum dot is returning to the ground state after having been excited by receiving incident light come from the light source.
  • the second layer 20 including quantum dots 11 may be used as an emission layer.
  • the propagation path of incident light is represented by a double lined arrow; and the propagation path of radiation light is represented by a bold lined arrow.
  • the quantum dot 11 because the quantum dot 11 has a discontinuous energy bandgap due to a quantum confinement effect, the quantum dot 11 receives incident light and emits radiation light having a certain wavelength region.
  • the second layer according to an embodiment includes quantum dots 11, it may express an image having a high color purity compared to the case of including other light emitter, and it may provide a display device having excellent viewing angle by the isotropic optical radiation characteristics of quantum dot 11.
  • the second layer 20 may further include a light scatterer 12.
  • the light scatterer 12 may be dispersed in the second layer 20 together with quantum dots 11.
  • the light scatterer 12 may induce the incident light to be entered into quantum dot 11 or may induce the radiation direction of the radiation light emitted from the quantum dot 11 to be escaped to the outside of second layer 20. Thereby, the photo efficiency deterioration of the second layer 20 may be minimized.
  • the first layer 10 may be formed on one surface of the second layer 20, for example, in the rear side of the second layer 20, as shown in FIG. 1.
  • the first layer 10 may be made of an optically transparent material.
  • the first layer 10 may be made of, for example, a material having a high absorption rate for a predetermined wavelength region.
  • the first layer 10 may be made of a material having an excellent light absorption rate for a visible light wavelength region of less than 500 nm.
  • the first layer 10 may have a light transmittance of greater than or equal to 80 %, for example, greater than or equal to 85 %, for example, greater than or equal to 90 %, for example, greater than or equal to 95 % in a wavelength region of greater than 540 nm.
  • the first layer 10 may have a light absorption rate of 100% in a wavelength region of, for example, 400 nm to 470 nm, for example, 420 nm to 470 nm, for example, 420 nm to 460 nm.
  • the first layer 10 may have a transmittance of greater than or equal to 60 %, for example, greater than or equal to 70 %, for example, greater than or equal to 80 %, for example, greater than or equal to 90 %, for example, greater than or equal to 95 % in the other visible light wavelength regions besides a predetermined wavelength region.
  • the first layer 10 may act a kind of a blue cut filter for blocking light in a blue wavelength region band.
  • an embodiment may provide a color filter 100 having excellent color purity and color reproducibility through the first layer 10.
  • the first layer 10 may have similar refractive index to the second layer 20. Thereby, it may minimize the event that the incident light entered into the first layer 10 is reflected or scattered from the first layer 10. That is, the optical loss of interface between the first layer 10 and the second layer 20 is minimized, so that it may provide a color filter 100 having enhanced optical efficiency.
  • the first layer 10 and the second layer 20 may be each formed in a single layer as shown in FIG. 1, but is not limited thereto, and may be formed in a multilayer of 2 or more layers.
  • the first layer 10 and the second layer 20 may be each a photosensitive material formed by using a photosensitive resin. Thereby, a predetermined pattern may be easily obtained using a photolithography.
  • photosensitive resin compositions for forming the first layer 10 and the second layer 20 may include a photopolymerizable monomer, a photoinitiator, an alkali soluble resin, a solvent and a dispersing agent.
  • the photopolymerizable monomer may be a material having photosensitive characteristics due to a carbon-carbon double bond, and may be a diacrylate compound, a triacrylate compound, tetraacrylate compound, a pentaacrylate compound, a hexaacrylate compound, or a combination thereof.
  • the photoinitiator may initiate a photopolymerization reaction of the photopolymerizable monomers.
  • the photoinitiator may include, for example, a triazine-based compound, an acetophenone-based compound, a benzophenone-based compound, a thioxanthone-based compound, a benzoin-based compound, an oxime-based compound, or a combination thereof, but is not limited thereto.
  • triazine-based compound may be 2,4,6-trichloro-s-triazine, 2-phenyl-4,6-bis(trichloro methyl)-s-triazine, 2-(3', 4'-dimethoxy styryl)-4,6-bis(trichloro methyl)-s-triazine, 2- (4'-methoxy naphthyl)-4,6-bis(trichloro methyl)-s-triazine, 2-(p-methoxy phenyl)-4,6-bis(trichloro methyl)-s-triazine, 2-(p-tolyl)-4,6-bis(trichloro methyl)-s-triazine, 2-biphenyl-4,6-bis(trichloro methyl)-s-triazine, bis(trichloro methyl)-6-styryl-s-triazine, 2-(naphtho1-yl)-4,6--bis
  • acetophenone-based compound may be 2,2'-diethoxy acetophenone, 2,2'-dibutoxy acetophenone, 2-hydroxy-2-methyl propinophenone, p-t-butyl trichloro acetophenone, p-t-butyl dichloro acetophenone, 4-chloro acetophenone, 2,2'-dichloro-4-phenoxy acetophenone, 2-methyl-1-(4-(methylthio)phenyl)-2-morpholino propan-1-one, or 2-benzyl-2-dimethyl amino-1-(4-morpholino phenyl)-butan-1-one, but are not limited thereto.
  • benzophenone-based compound may be benzophenone, benzoyl benzoate, benzoyl methyl benzoate, 4-phenyl benzophenone, hydroxy benzophenone, acrylated benzophenone, 4,4'-bis(dimethyl amino)benzophenone, 4,4'-dichloro benzophenone, or 3,3'-dimethyl-2-methoxy benzophenone, but are not limited thereto.
  • Examples of the thioxanthone-based compound may be thioxanthone, 2-methyl thioxanthone, isopropyl thioxanthone, 2,4-diethyl thioxanthone, 2,4-diisopropyl thioxanthone, or 2-chloro thioxanthone, but are not limited thereto.
  • benzoin-based compound examples may be benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, or benzyl dimethyl ketal, but are not limited thereto.
  • Examples of the oxime-based compound may be 2-(o-benzoyloxime)-1-[4-(phenylthio)phenyl]-1,2-octandione and 1-(o-acetyloxime)-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]ethanone, but are not limited thereto.
  • the alkali soluble resin may be an acryl-based resin having a carboxyl group (-COOH), and may be, for example a copolymer of a monomer mixture of a first monomer including a carboxyl group and a carbon-carbon double bond and a second monomer including a carbon-carbon double bond and a hydrophobic residual group and not including a carboxyl group.
  • the quantum dot may be dispersed (e.g., separated) in the second layer 20 by the alkali soluble resin to form a quantum dot-polymer composite structure.
  • the first monomer may be, for example acrylic acid, methacrylic acid, maleic acid, itaconic acid, fumaric acid, 3-butanoic acid, vinyl acetate, vinyl carbonic acid vinyl ester compounds such as vinyl acetate, and vinyl benzoate, but are not limited thereto.
  • the first monomer may be one or more compounds.
  • the second monomer may be, for example alkenyl aromatic compounds such as styrene, ⁇ -methyl styrene, vinyl toluene, or vinyl benzyl methyl ether; unsaturated carbonic acid ester compounds such as methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, butyl methacrylate, benzyl acrylate, benzyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, phenyl acrylate, or phenyl methacrylate; unsaturated carbonic acid amino alkyl ester compounds such as 2-amino ethyl acrylate, 2-amino ethyl methacrylate, 2-dimethyl amino ethyl acrylate, N-phenylmaleimide, N-benzylmaleimide, N-alkylmaleimide, or 2-
  • the photosensitive composition may further include various additives such as a leveling agent or a coupling agent.
  • the additive content is not particularly limited but may be appropriately controlled within the range which does not make unfavorable influences on the photosensitive composition and the pattern obtained therefrom.
  • the leveling agent prevents stains or spots and improves leveling characteristics, and specific examples may be follows without limitation.
  • a fluorine-based leveling agent may include commercial products, for example BM-1000 ® , and BM-1100 ® (BM Chemie Inc.); MEGAFACE F 142D ® , F 172 ® , F 173 ® , and F 183 ® of Dainippon Ink Kagaku Kogyo Co., Ltd.; FC-135 ® , FC-170C ® , FC-430 ® , and FC-431 ® of Sumitomo 3M Co., Ltd.; SURFLON S-112 ® , SURFLON S-113 ® , SURFLON S-131 ® , SURFLON S-141 ® , and SURFLON S-145 ® of Asahi Glass Co., Ltd.); and SH-28PA ® , SH-190 ® , SH-193 ® , SZ-6032 ® , and SF-8428 ® , and the like of Toray Silicone Co., Ltd.).
  • the leveling agent may be controlled according to desirable properties.
  • the coupling agent may be used to increase adherence with a substrate and may be a silane-based coupling agent.
  • the silane-based coupling agent may be vinyl trimethoxysilane, vinyl tris(2-methoxyethoxysilane), 3-glycidoxypropyl trimethoxysilane, 2-(3,4-epoxy cyclohexyl)ethyl trimethoxysilane, 3-chloropropyl methyldimethoxysilane, 3-chloropropyl trimethoxysilane, 3-methacryloxylpropyl trimethoxysilane, 3-mercaptopropyl trimethoxysilane, and the like.
  • the solvent may be determined considering the amounts of the components (i.e., a photopolymerizable monomer, a photoinitiator, an alkali soluble resin, and an additive) and and/or the quantum dot 11 and the light scatterer 12 which may be described later.
  • the components i.e., a photopolymerizable monomer, a photoinitiator, an alkali soluble resin, and an additive
  • the photosensitive resin composition may include a balance amount of the solvent except amounts of desirable solids (non-volatiles), and the solvent may be appropriately selected considering affinity for other components in the composition (e.g., an alkali soluble resin, a photopolymerizable monomer, a photoinitiator, an additive and/or a quantum dot and a light scatterer which may be described later), affinity for alkali developing solution, and boiling points, and the like.
  • desirable solids e.g., an alkali soluble resin, a photopolymerizable monomer, a photoinitiator, an additive and/or a quantum dot and a light scatterer which may be described later
  • the solvent may be ethylene glycols such as ethyl 3-ethoxy propionate, ethylene glycol, diethylene glycol, or polyethylene glycol; glycolethers such as ethylene glycolmonomethylether, ethylene glycolmonoethylether, diethylene glycolmonomethylether, ethylene glycoldiethylether, or diethylene glycoldimethylether; glycoletheracetates such as ethylene glycolacetate, ethylene glycolmonoethyletheracetate, diethylene glycolmonoethyletheracetate, or diethylene glycolmonobutyletheracetate; propylene glycols such as propylene glycol; propylene glycolethers such as propylene glycolmonomethylether, propylene glycolmonoethylether, propylene glycolmonopropylether, propylenemonobutylether, propylene glycoldimethylether, dipropylene glycoldimethylether, propylene glycoldiethylether, or
  • the first solvent included in the first photosensitive resin composition may be a solvent having the different polarity from the second solvent included in the second photosensitive resin composition. That is, either the first solvent or the second solvent may be non-polar, and the other may have polarity.
  • the solvent having non-polarity may include alkanes such as pentane, hexane, heptanes; aromatic hydrocarbons such as toluene, xylene; diethyl ether, dipropyl ether, dibutyl ether, diisoamyl ethers; alkyl halides such as chloroform, trichloromethane; cycloalkanes such as cyclopropane, cyclobutane, cyclopentane, cyclohexane; and a mixture thereof, but is not necessarily limited thereto, and may include all nonpolar solvents having relative polarity index (PI) of less than or equal to 5.0 when water (H 2 O) is assumed to have a PI of 9.0.
  • alkanes such as pentane, hexane, heptanes
  • aromatic hydrocarbons such as toluene, xylene
  • the first, second photosensitive resin compositions may include a thiol-based hardener.
  • the thiol-based hardener refers to a composition reactive to a carbon-carbon double bond of photopolymerizable monomer and having at least one thiol group being capable of primarily thermally curing the photopolymerizable monomer in a molecule.
  • the thiol-based hardener may be any hardener having at least one thiol group, preferably at least two thiol groups in a molecule structure without particular limit.
  • a dispersing agent may be added in order to increase dispersibility of the quantum dot 11 and the light scatterer 12.
  • the dispersing agent may include a non-ionic a dispersing agent, a cationic dispersing agent, an anionic dispersing agent, and a combination thereof.
  • dispersing agent may be polyalkylene glycol, or esters thereof, polyoxyalkylene, polyalcoholester-alkyleneoxide addition products, alcohol-alkyleneoxide addition products, sulfonate esters, sulfonate salts, carboxylate esters, carboxylate salts, alkyl amide alkylene oxide addition products, alkyl amine, or a combination thereof, but is not limited thereto.
  • the first photosensitive resin composition for the first layer 10 may include a material absorbing blue light in addition to the components, for example, an organic material or an inorganic material including pigment or dye or a combination thereof.
  • the blue light absorption material may be 5 wt% to 60 wt%, for example 5 wt% to 50 wt%, for example 5 wt% to 40 wt%, for example 5 wt% to 30 wt%, for example 10 wt% to 30 wt%, for example 20 wt% to 30 wt% based on the total weight of the first photosensitive resin composition.
  • the first layer 10 having a blue light absorption rate of greater than or equal to 80 % may be made.
  • the quantum dot 11 is not particularly limited and may be a commercially available quantum dot.
  • the quantum dot may be a Group II-VI compound, a Group III-V compound, a Group IV-VI compound, a Group IV compound, a Group II-III-IV compound, a Group I-II-IV-VI compound or a combination thereof.
  • the Group II-VI compound may be selected from a binary element compound selected from CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, and a mixture thereof; a ternary element compound selected from CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS, and a mixture thereof; and a quaternary element compound selected from HgZnTeS, CdZnSeS, CdZnSeTe, Cd
  • the Group III-V compound may be selected from a binary element compound selected from GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, and a mixture thereof; a ternary element compound selected from GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb, InPAs, InPSb, and a mixture thereof; and a quaternary element compound selected from GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, and a mixture thereof.
  • the Group IV-VI compound may be selected from a binary element compound selected from SnS, SnSe, SnTe, PbS, PbSe, PbTe, and a mixture thereof; a ternary element compound selected from SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, and a mixture thereof; and a quaternary element compound selected from SnPbSSe, SnPbSeTe, SnPbSTe, and a mixture thereof.
  • the Group I-III-VI compound may include CuInSe 2 , CuInS 2 , CuInGaSe, and CuInGaS but is not limited thereto.
  • the Group I-II-IV-IV compound may include CuZnSnSe, and CuZnSnS but is not limited thereto.
  • the Group IV compound may include a single-element compound selected from Si, Ge, and a mixture thereof; and a binary element compound selected from SiC, SiGe, and a mixture thereof.
  • the binary element compound, the ternary element compound or the quaternary element compound respectively exist in a uniform concentration in the quantum dot particle or partially different concentrations in the same particle.
  • the quantum dot may have a core-shell structure wherein a quantum dot surrounds another quantum dot.
  • the core and shell may have an interface, and an element of at least one of the core or the shell in the interface may have a concentration gradient wherein the concentration of the element(s) of the shell decreases toward the core.
  • the quantum dot may have one core of a quantum dot and multi-shells surrounding the core.
  • the multi-shell structure has at least two shells wherein each shell may be a single composition, an alloy, or the one having a concentration gradient.
  • the materials of the shell may have a larger energy bandgap than that of the core, and thereby the quantum dot may exhibit a quantum confinement effect more effectively.
  • the bandgap of the material of an outer shell may be higher energy than that of the material of an inner shell (a shell that is closer to the core).
  • the quantum dot may emit light of a wavelength ranging from UV to infrared light.
  • an organic material may be further substituted on the shell surface to stabilize a quantum dot in order to improve stability and dispersibility of a quantum dot.
  • the organic material may be a thiol-based, an amine-based, a phosphine oxide-based, an acryl-based, or a silicon-based organic material, but is not limited thereto.
  • the quantum dot may have quantum efficiency of greater than or equal to 10 %, for example, greater than or equal to 30 %, greater than or equal to 50 %, greater than or equal to 60 %, greater than or equal to 70 %, or greater than or equal to 90 %.
  • the quantum dot may have a narrow spectrum in order to improve color purity or color reproducibility.
  • the quantum dot may have a full width at half maximum (FWHM) of less than or equal to 100 nm, for example less than or equal to 80 nm, less than or equal to 60 nm, less than or equal to 50 nm, or 20 nm to 50 nm in a light emitting wavelength spectrum.
  • FWHM full width at half maximum
  • the quantum dot 11 may be included in an amount of 1 wt% to 50 wt%, for example 5 wt% to 40 wt%, for example 10 wt% to 30 wt% based on the total weight of the second photosensitive resin composition. By adjusting the amount of quantum dot 11 within the range, a color filter 100 may have excellent color reproducibility and color purity.
  • the shape of quantum dot is shown in a sphere in FIG. 1 but is not necessarily limited thereto, and the shape of quantum dot is not particularly limited as long as being generally used in this field.
  • the quantum dot may have other shapes of a pyramidal shape or a multi-arm shape, or may be a cubic nanoparticle, a nanotube, a nanowire, a nanofiber, or a nanosheet-shaped particle.
  • FIG. 2 is a view showing the color filter of FIG. 1 in more detail;
  • FIG. 3 is a view further specifically showing the path of the first light entered into the color filter of FIG. 2; and
  • FIG. 4 is a view showing inner dimensions of the color filter of FIG. 2.
  • the color filter 100 may be compartmented into a first region PX1 indicating a first light, a second region PX2 indicating a second light, and a third region PX3 indicating a third light. Each region may be partitioned by a light blocking member 403.
  • first region PX1 to third region PX3 form a predetermined regular arrangement.
  • the array in which the first region PX1, the second region PX2, and the third region PX3 are sequentially disposed in a direction from the right side to the left side in FIG. 2 is one unit region, two or more unit regions are regularly repeated to provide an arrangement.
  • the unit region is two-dimensionally repeated to provide an arrangement, for example, in a matrix.
  • the arrangement order or the arrangement direction of the first region PX1 to the third region PX3 may be variously designed.
  • the first region PX1 of color filter expresses blue light as a first light; the second region PX2 expresses green light as a second light; and the third region PX3 may express red light as a third light.
  • the operating method and the composition of the color filter are not necessarily limited thereto, but the color filter may be supplied with white light or ultraviolet (UV) to express each blue light, green light, red light.
  • the first layer 10 may be formed only in the second region PX2 and the third region PX3; the second layer 20 may be formed in all of the first region PX1 to the third region PX3.
  • the transparent medium may be formed to fully fill the first region PX1 and may have a variety of heights, sizes or the like according to exemplary embodiments.
  • the transparent medium may include the light scatterer 12 which changes only the propagation direction of blue light without changing the wavelength of blue light. Meanwhile, the transparent medium may be omitted according to an exemplary embodiment.
  • hollow may be provided in the first region PX1, and the hollow may play a role of a blue filter 21.
  • the color filter 100 may express blue light through the first region PX1.
  • the second region PX2 includes a first layer 10 and a green filter 20g disposed on the first layer 10.
  • the green filter 20g includes a first quantum dot 11g emitting green light while being stabilized to the ground state after it was excited by receiving blue light.
  • the light radiated by the first quantum dot 11g passes through the first layer 10 to be emitted to the outside of color filter, but the blue light passed through the green filter 20g is absorbed by the first layer 10 so not to be emitted to the outside of color filter.
  • first quantum dot 11g and second quantum dot 11r may be made of the same materials but may have different size from each other so as to emit each green light and red light having different wavelengths from each other.
  • the first quantum dot 11g may have a smaller size than the second quantum dot 11r, thereby, it may emit green light having higher energy, which has a center wavelength of 545 ⁇ 10 nm and a full width at half maximum (FWHM) of 20 nm to 60 nm, than red light.
  • the second quantum dot 11r may have a larger size than the first quantum dot 11g, thereby, it may emit red light having lower energy, which has a center wavelength of 650 ⁇ 15 nm and a full width at half maximum (FWHM) of 20 nm to 60 nm, than green light.
  • the blue light is converted to green light or red light by the first quantum dot 11g or the second quantum dot 11r, and the provided lights are scattered and emitted by a light scatterer 12 and other scatter-inducing particles, so the propagation direction of the emitted light is wide, and the light grayscale is not changed depending upon a position. That is, the color filter 100 may have a wide viewing angle.
  • the first layer 10 may be integrally formed to fully cover the second region PX2 and third region PX3 in the substrate 401. That is, the first layer 10 blocks visible light in a blue light wavelength region but has a high transmittance in other visible light wavelength regions, so may be integrally formed in a connection under the green filter 20g and the red filter 20r.
  • the first layer is not needed to be formed in each the green filter and the red filter by the additional process, so unnecessary processes may be omitted during making the color filter according to one embodiment.
  • the first layer 10 may have a width L1 of 1 ⁇ m to 200 ⁇ m.
  • the first layer 10 may effectively and fully absorb blue light emitted from the light source within the width L1 range, so the cross-talk of quantum dot may be prevented.
  • the first layer 10 may have a thickness H1 of 0.1 ⁇ m to 5 ⁇ m, for example, 1 ⁇ m to 3 ⁇ m.
  • the first layer 10 may show excellent surface planarity within the thickness H1 range.
  • the thickness H2 of red filter 20r and the thickness H3 of green filter 20g may be same or different from each other.
  • the thickness H2 of red filter 20r and the thickness H3 of green filter 20g may be each 0.1 ⁇ m to 20 ⁇ m, for example, 1 ⁇ m to 5 ⁇ m.
  • the color filter 100 may emit light amount of red light or green light by each filter in an appropriate level. That is, the color filter may have excellent color reproducibility and luminance.
  • the blue filter 21 may be provided to dispose the upper surface on the same plane surface as in the red filter 20r and the green filter 20g, but is not limited thereto.
  • the thickness of blue filter 21 may be variously adjusted considering a gap with the adjacent red filter 20r or the adjacent green filter 20g, a width of first region PX1, thicknesses H2 and H3 of red filter 20r or green filter 20g, or a thickness of first layer 10.
  • the thickness H4 of blue filter 21 may be thinner than the thickness of the first layer 10, for example, the thickness H4 of blue filter 21 may be same or thicker than the thickness of first layer 10 and also may be same as or thinner than the sum H1+H2 of the thickness H1 of first layer 10 and the thickness H2 of red filter 20r or the sum H1+H3 of the thickness H1 of first layer 10 and the thickness H3 of green filter 20g.
  • the first photosensitive resin composition may be obtained by mixing the photopolymerizable monomer, the photoinitiator, the carboxyl group-contained alkali soluble resin, the hardener, the dispersing agent and the first solvent, as a material for the first layer 10.
  • a light scatterer and quantum dots may be further mixed to the photopolymerizable monomer, the photoinitiator, the carboxyl group-contained alkali soluble resin, the hardener, the dispersing agent, and the second solvent, as a material for the second layer 20.
  • a light blocking member is formed to leave a space in a predetermined interval on the substrate.
  • the intervals between light blocking members become first to third regions, respectively.
  • first photosensitive resin composition is coated on the substrate formed with light blocking member according to spin coating, or slit coating and the like
  • second photosensitive resin composition is coated on first photosensitive resin composition by spin coating, or slit coating and the like.
  • the first photosensitive resin composition and the second photosensitive resin composition are sequentially coated on the substrate. That is, as the first solvent and second solvent have different polarity from each other, the first photosensitive resin composition and the second photosensitive resin composition are immiscible to provide layers.
  • the stacked structure is prebaked to remove moisture existed in the first photosensitive resin composition and the second photosensitive resin composition.
  • the specific conditions such as a temperature, a time, atmosphere of pre-baking are known and may be appropriately adjusted, and may be omitted if desirable.
  • the stacked structure is exposed to light having a predetermined wavelength under a mask having a predetermined pattern.
  • the wavelength and the intensity of the exposing light may be selected considering the kind and the content of photoinitiator, the kind and the content of quantum dots or the like.
  • the method of manufacturing a color filter 100 may provide a first layer 10 through one process without separately forming the first layer 10 for each the second region PX2 and the third region PX3, so as to provide a color filter having excellent display characteristics such as color reproducibility, color purity, viewing angle with no significantly increasing the number of processes.
  • the color filter according to one embodiment is not necessarily manufactured by the making method, but may be manufactured in the different methods according to the conditions such as a kind and a size of the product to be applied with the color filter, or according to the various process conditions of the material of the first photosensitive resin composition and the second photosensitive resin composition, a coating speed, a processing temperature or the like.
  • the first photosensitive resin composition may be primarily prebaked before coating the second photosensitive resin composition; and the prebaked first photosensitive resin composition may be cured using light or heat, and then the second photosensitive resin composition may be coated.
  • a structure of display device including the color filter of FIGS. 2 to 4 is described with reference to FIG. 5.
  • a liquid crystal display LCD
  • the scope of one embodiment is not necessarily limited thereto and may be applicable to a color filter for the various display devices such as an organic light emitting diode (OLED) display or a light emitting diode.
  • OLED organic light emitting diode
  • FIG. 5 is a view showing a display device including the color filter of FIG. 2.
  • the display device 1000 includes a light source 200 and a lower panel 300 and an upper panel 400.
  • the light source 200 may supply first light toward the lower panel 300 and the upper panel 400 in the front side of the first direction D1 of FIG. 5.
  • the light source 200 may include a light emitter capable of emitting a first light.
  • the first light emitted from the light source 200 may be, for example, light in a visible light region, for example, blue light, which is light having a high energy in the visible light region.
  • the first light of blue light may be supplied to a lower panel 300 and a upper panel 400.
  • the first light is not necessarily limited thereto, but may be other light besides blue light in the visible light wavelength region or ultraviolet (UV) in the ultraviolet (UV) wavelength region.
  • the gate line and the sustain voltage line are electrically separated from each other, and herein, the data line is insulated from and crosses the gate line and the sustain voltage line.
  • the gate electrode, the source electrode, and the drain electrode respectively include a control terminal, an input terminal, and an output terminal of the thin film transistor.
  • the drain electrode is electrically connected with the pixel electrode.
  • the pixel electrode may be made of a transparent conductive material of indium tin oxide (ITO) or indium zinc oxide (IZO), and generates an electric field to control arrangement directions of liquid crystal molecules.
  • ITO indium tin oxide
  • IZO indium zinc oxide
  • the alignment layer 501 is disposed on the TFT array 303.
  • the alignment layer 501 may include at least one of polyamic acid, polysiloxane, polyimide, and the like that are generally-used materials in a liquid crystal alignment layer.
  • the alignment layer 501 may initially arrange liquid crystal molecules in the liquid crystal layer 500. Positions of the alignment layer 501 may be different according to embodiments.
  • the alignment layer 501 may be over or under the liquid crystal layer 500, or as shown in FIG. 5, the alignment layer 501 may be disposed over and under the liquid crystal layer 500, and may be omitted as needed.
  • the liquid crystal layer 500 is disposed between the lower panel 300 and the upper panel 400.
  • the liquid crystal layer 500 may have a thickness, for example, of 5 ⁇ m to 6 ⁇ m.
  • Kinds of liquid crystal molecules in the liquid crystal layer 500, or a driving manner of the liquid crystal layer 500, may be diversified according to embodiments. That is, the liquid crystal layer 500 may be disposed between the first substrate 301 and the color filter 100, as shown in FIG. 5, or may be changed to be disposed between the second substrate 401 and the color filter 100 according to the driving manner.
  • a first polarizer 302 is adhered to a rear side of the first substrate 301.
  • the first polarizer 302 may include a polarizing element and a protective layer, and the protective layer may include TAC (tri-acetyl-cellulose).
  • the first polarizer 302 may be disposed between the first substrate 301 and the TFT array 303, or at other positions in the lower panel 300.
  • a common electrode 404 is disposed on the liquid crystal layer 500.
  • the common electrode 404 may be made of a transparent conductive material of indium tin oxide (ITO) or indium zinc oxide (IZO), and generates an electric field to control arrangement directions of liquid crystal molecules.
  • a position of the common electrode 404 may be diverse according to embodiments, and may be on the lower panel 300.
  • the upper panel 400 is formed with a second polarizer 402 on the second substrate 401 made of a transparent glass or plastic or the like.
  • the second polarizer 402 may include a polarizing element and a protective layer, and the protective layer may include TAC (tri-acetyl-cellulose).
  • the second polarizer 402 is disposed on the second substrate 401, but may be disposed on other positions in the upper panel 400, for example, on the common electrode 404 or beneath the second substrate 401, or may be omitted.
  • the color filter 100 is disposed under the second substrate 401, and the color filter 100 is compartmentalized into the first region PX1 to the third region PX3 by a light blocking member 403 as described in above.
  • the light blocking member 403 may be formed of a material passing no light, for example, of metal particles such as chromium (Cr), silver (Ag), molybdenum (Mo), nickel (Ni), titanium (Ti), tantalum (Ta), and the like, an oxide of the metal particles, or a combination thereof.
  • the light blocking member 403 prevents light leakage of the display device 1000 and improves its contrast.
  • the light blocking members 403 are formed under the second substrate 401 and are disposed apart from each other by a predetermined distance, as shown in FIG. 5.
  • the color filter 100 is partitioned into each region by a light blocking member (black matrix), and thus may block incident light in one region from intrusion into the other regions and may prevent a color mixture of red, green, and blue from being displayed by the display device 100.
  • a light blocking member black matrix
  • the color filter 100 is disposed in a front side of the first substrate 301. That is, with reference to the first direction D1, which is a direction of supplying the first light, the first substrate 301, the color filter 100, the second substrate 401 are sequentially disposed in the front side of light source along with the first direction D1.
  • the color filter 100 may be disposed in the upper panel 400, but is not necessarily limited thereto, and the color filter 100 may be disposed in the lower panel 300 according to the driving manner of the display device 1000.
  • the second layer 20 of the color filter 100 is disposed in the front side of the first layer 10. That is, as shown in FIG. 5, the color filter 100 has a structure that the first light is entered into each the blue filter 21, the green filter 20g or the red filter 20r, then the light emitted from the green filter 20g or the red filter 20r is passed through the first layer 10 and emitted to the outside of color filter 100.
  • a composition for a first layer was prepared in accordance with the same procedure as in Preparation Example 1, except that yellow dye (Y150, manufactured by TOYO) was used as a colorant instead of Y138.
  • FIG. 6 is a graph showing a transmission spectrum of the first layer of color filter according to an embodiment, depending upon the visible light wavelength region.
  • a photoinitiator After dissolving a photoinitiator into a solvent, it was sufficiently agitated at a room temperature for 2 hours, and then a photopolymerizable monomer and an alkali soluble resin were added together with a light-conversion material (quantum dot) and agitated again at a room temperature for 2 hours. Subsequently, a light scatterer (TiO 2 ), a fluorine-based surfactant and a thiol-based compound were added thereto and then agitated at a room temperature for 1 hour, and the mixture was filtered for 3 times to remove impurities, thereby a composition for a second layer was prepared.
  • a light scatterer TiO 2
  • TiO 2 dispersion liquid TiO 2 solid: 20 %, TiO 2 average particle diameter: 200 nm to 250 nm, manufactured by Ditto Technology
  • (G)-1 fluorine-based surfactant (F-554, manufactured by DIC Co., Ltd.,)
  • the photosensitive resin composition obtained from Preparation Example 1 was coated on a 10 cm 2 ⁇ 10 cm 2 glass substrate according to a spin coating and pre-baked at 100 °C for 2 minutes. Then it was cooled under the air atmosphere to provide a first layer of organic membrane.
  • the stacked structure which the first layer of organic membrane and the second layer of organic membrane sequentially coated on the glass substrate was developed by a 0.2 wt% potassium hydroxide (KOH) aqueous solution using a developer (SSP-200 made by SVS). Then, it was hard-baked at a temperature of 180 °C for 30 minutes in a convection oven to provide a photosensitive organic film having a patterned 2-layered structure.
  • KOH potassium hydroxide
  • a photosensitive organic film having a patterned 2-layered structure was manufactured in accordance with the same procedure as in Example 1, except that the composition for a second layer obtained from Preparation Example 4 was used instead of the composition for a second layer obtained from Preparation Example 3.
  • a photosensitive organic film having a patterned 2-layered structure was manufactured in accordance with the same procedure as in Example 1, except that the composition for a second layer obtained from Preparation Example 6 was used instead of the composition for a second layer obtained from Preparation Example 3.
  • a photosensitive organic film having a patterned 2-layered structure was manufactured in accordance with the same procedure as in Example 1, except that the composition for a second layer obtained from Preparation Example 7 was used instead of the composition for a second layer obtained from Preparation Example 3.
  • a photosensitive organic film having a patterned 2-layered structure was manufactured in accordance with the same procedure as in Example 1, except that the composition for a second layer obtained from Preparation Example 8 was used instead of the composition for a second layer obtained from Preparation Example 3.
  • the photosensitive organic films having a 2-layered structure obtained from Examples 1 to 6 were each measured for a photo-conversion spectrum using a spectroradiometer (CAS140CT, made by Instrument System), and the results are shown in FIG. 7 and FIG. 8.
  • FIG. 7 is a graph showing a transmission spectrum of color filter according to an embodiment, for a visible light wavelength region emitted from the green filter in the visible light wavelength region.
  • the green colors filter according to Examples 1 to 3 did not emit blue light in a blue light wavelength region, which is estimated because the blue light was fully absorbed by the first layer.
  • Example 2 In addition, in the cases of Examples 2 and 3 gradually increasing the content of quantum dots, comparing to Example 1, the transmission spectrum intensity in the green light emitting region was gradually increased. This is estimated because the generated light amount of internal green light was increased according to increasing the number of quantum dots in the second layer.
  • FIG. 8 is a graph showing a transmission spectrum of color filter according to an embodiment, for the visible light wavelength region emitted from the red filter in the visible light wavelength region.
  • red color filters according to Examples 4 to 6 did not emit blue light in the blue light wavelength region under the same reasons as in the green color filters of Examples 1 to 3.
  • the color filter according to an embodiment had excellent color reproducibility of green light and red light, color purity and viewing angle, by providing a first layer playing a role of a blue cut filter under the second region and the third region of the second layer which is a light emitting layer.
  • it may secure the light amount of green light and red light in an acceptable level as a color filter by adjusting the amount of quantum dots in the green filter or the red filter.
  • the color filter having excellent color reproducibility, color purity and viewing angle, a method of making the same, and a display device including the same may be provided.

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Abstract

L'invention concerne un filtre coloré qui est compartimenté en une première région conçue pour émettre une première lumière, une deuxième région configurée pour émettre une deuxième lumière ayant une longueur d'onde plus longue que la première lumière, et une troisième région conçue pour émettre une troisième lumière ayant une longueur d'onde plus longue que la deuxième lumière, et qui comprend un substrat, et une première couche comprenant d'un seul tenant, et formée sur, la deuxième région et la troisième région, et une seconde couche sur la première couche dans le substrat, la première couche ayant un taux d'absorption supérieur ou égal à 80 % pour la première lumière et la seconde couche comprenant un point quantique en tant que matériau de conversion de lumière, un procédé de fabrication de ce dernier, et un dispositif d'affichage comprenant le filtre coloré.
PCT/KR2016/011240 2016-03-24 2016-10-07 Filtre coloré, son procédé de fabrication, et dispositif d'affichage le comprenant WO2017164475A1 (fr)

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KR102573161B1 (ko) 2018-01-18 2023-08-31 삼성디스플레이 주식회사 표시 장치
KR102582649B1 (ko) 2018-02-12 2023-09-25 삼성디스플레이 주식회사 표시 장치
KR102412879B1 (ko) 2018-03-29 2022-06-27 삼성디스플레이 주식회사 색 변환 패널 및 이를 포함하는 표시 장치
KR102561114B1 (ko) 2018-06-04 2023-07-28 삼성디스플레이 주식회사 색변환 표시판의 제조 방법 및 색변환 표시판을 포함하는 표시 장치의 제조 방법
KR102285669B1 (ko) * 2018-08-27 2021-08-04 동우 화인켐 주식회사 컬러 필터, 그 제조 방법, 및 컬러 필터를 포함하는 화상표시장치
KR102550520B1 (ko) 2018-10-08 2023-07-04 삼성디스플레이 주식회사 표시 장치

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