WO2016076322A1 - 光学フィルム、それを用いた光学バリアフィルム、色変換フィルム、及びバックライトユニット - Google Patents
光学フィルム、それを用いた光学バリアフィルム、色変換フィルム、及びバックライトユニット Download PDFInfo
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- WO2016076322A1 WO2016076322A1 PCT/JP2015/081637 JP2015081637W WO2016076322A1 WO 2016076322 A1 WO2016076322 A1 WO 2016076322A1 JP 2015081637 W JP2015081637 W JP 2015081637W WO 2016076322 A1 WO2016076322 A1 WO 2016076322A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/16—Optical coatings produced by application to, or surface treatment of, optical elements having an anti-static effect, e.g. electrically conducting coatings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
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- 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
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
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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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2551/00—Optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0226—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures having particles on the surface
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0294—Diffusing elements; Afocal elements characterized by the use adapted to provide an additional optical effect, e.g. anti-reflection or filter
-
- 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
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
Definitions
- the present invention relates to an optical film, an optical barrier film using the same, a color conversion film, and a backlight unit.
- a liquid crystal display is a device that displays an image by transmitting or blocking light based on application of a voltage. Since the liquid crystal display requires an external light source, for example, a backlight using a light emitting diode is used as a light source for the liquid crystal display.
- the core-shell luminescent nanocrystal can be incorporated into a backlight unit as a color conversion film after being mixed with a binder resin, for example.
- the surface of the mat layer and other members facing the mat layer may be damaged.
- the mat layer or the like may be similarly damaged.
- the manufacturing process of the backlight unit if foreign matter such as dust is present on the mat layer or the like, the surface of the mat layer or the like may be damaged. If the surface of the mat layer and other members facing the mat layer is damaged, the display performance of the display is degraded.
- the present invention is an optical film including a mat layer, and prevents the surface of the mat layer and other members facing the mat layer from being scratched after preventing blocking with other members facing the mat layer.
- the purpose is to provide.
- Another object of the present invention is to provide an optical barrier film, a color conversion film, and a backlight unit that include this optical film and are excellent in barrier properties.
- An optical film according to an embodiment of the present invention includes a transparent film base material and a mat layer having an uneven shape disposed on the transparent film base material, and the mat layer has a static friction coefficient of 0.3 or less.
- the mat layer has a maximum height roughness Rz of 0.05 ⁇ m or more and 8 ⁇ m or less. According to this optical film, since the mat layer having an appropriate uneven shape is provided, in addition to the anti-blocking property, scratch resistance can be obtained. In other words, an optical film is obtained in which the blocking of the mat member and other members facing the mat layer is prevented, and the mat layer and the surfaces of the other members facing the mat layer are hardly damaged.
- the matte layer includes at least one selected from the group consisting of a quaternary ammonium salt material, a conductive polymer, and metal oxide particles.
- a quaternary ammonium salt material e.g., a quaternary ammonium salt material, a conductive polymer, and metal oxide particles.
- the surface resistance value of the mat layer is preferably 1.0 ⁇ 10 13 ⁇ / ⁇ or less. According to this optical film, since the surface resistance value of the mat layer is 1.0 ⁇ 10 13 ⁇ / ⁇ or less, suitable antistatic performance is exhibited.
- An optical barrier film includes a barrier layer and the above optical film, and the barrier layer is disposed on a surface of the optical film opposite to the matte layer side of the transparent film substrate. . According to this optical barrier film, the anti-blocking property and the scratch-proofing property are exhibited by the mat layer, and the penetration of air and water vapor is appropriately reduced by the barrier layer.
- An optical barrier film includes a barrier composite layer having a transparent film substrate and a barrier layer, and the optical film, and the barrier composite layer is a matte layer side of the transparent film substrate in the optical film. It is arrange
- the barrier composite layer has fewer scratches and defects generated in the process than the barrier layer, and further reduces the intrusion of air and water vapor.
- the barrier layer preferably contains a silicon oxide represented by SiOx (1.0 ⁇ x ⁇ 2.0). According to this optical barrier film, since the barrier layer contains silicon oxide having a suitable atomic ratio, the barrier property is maintained over a long period of time.
- a backlight unit includes a light source, a light guide plate, and a color conversion film disposed on the light guide plate, and the color conversion film is disposed so that the mat layer is in contact with the light guide plate. Has been. According to this backlight unit, it is possible to prevent the light guide plate in contact with the color conversion film from being damaged. In addition, since the barrier layer itself is also prevented from being damaged, the penetration of air and water vapor into the color conversion layer is appropriately reduced, and good white light can be obtained from the backlight unit over a long period of time. .
- an optical film including a mat layer, which is prevented from being scratched on the surface of the mat layer and other members facing the mat layer after preventing blocking with the other members facing the mat layer.
- An optical film is provided.
- an optical barrier film, a color conversion film, and a backlight unit that include this optical film and that are excellent in barrier properties.
- optical film which concerns on embodiment of this invention. It is a schematic cross section of the optical barrier film which concerns on embodiment of this invention. It is a schematic cross section of another optical barrier film which concerns on embodiment of this invention. It is a schematic cross section of the color conversion film which concerns on embodiment of this invention. It is a schematic cross section of the backlight unit according to the embodiment of the present invention.
- FIG. 1 is a schematic cross-sectional view of an optical film according to an embodiment of the present invention.
- the optical film 1 includes a first transparent film substrate 10 and a mat layer 11.
- the first transparent film substrate 10 has a first surface 10A and a second surface 10B facing the first surface 10A.
- the mat layer 11 has an uneven surface 11A and a lower surface 11B having an uneven shape.
- the lower surface 11B of the mat layer 11 and the second surface 10B of the first transparent film substrate 10 are bonded together, and the mat layer 11 is provided on the first transparent film substrate 10.
- the thickness of the first transparent film substrate 10 is preferably in the range of 5 ⁇ m to 300 ⁇ m, for example.
- the thickness of the first transparent film base material 10 is smaller than 5 ⁇ m, the strength of the first transparent film base material 10 is lowered, and in the backlight unit manufacturing process using the first transparent film base material 10 and the like, Handling of the film substrate 10 becomes difficult.
- the thickness of the first transparent film substrate 10 is larger than 300 ⁇ m, it becomes difficult to handle the first transparent film substrate 10 during the film-forming process using the roll-to-roll method.
- the mat layer composition for producing the mat layer 11 includes, for example, a binder resin and fine particles.
- the uneven shape of the uneven surface 11A of the mat layer 11 is formed by, for example, fine particles.
- Adhesion blocking with other members facing the optical film 1 ( Adhesion) is preferably prevented.
- the thickness of the mat layer 11 is preferably 0.5 ⁇ m or more and 30 ⁇ m or less, for example.
- the thickness of the mat layer 11 is measured by a mass method according to JIS K5600.
- the concavo-convex shape of the concavo-convex surface 11A of the mat layer 11 is formed not only by the method using fine particles but also by embossing, for example.
- corrugated shape is formed, for example by making phase separation of resin, such as a binder resin, and making the mat layer 11 the sea island structure.
- the mat layer 11 may or may not contain fine particles.
- the mat layer 11 used in the present invention has a static friction coefficient of 0.3 or less.
- the static friction coefficient of the mat layer 11 is more preferably 0.25 or less.
- the static friction coefficient of the mat layer 11 is adjusted, for example, by changing the kind of the binder resin, the material of the fine particles, the particle size, the blending amount, and the like.
- the maximum height roughness Rz is 0.05 ⁇ m or more and 8 ⁇ m or less.
- the maximum height roughness Rz of the mat layer 11 is more preferably 5 ⁇ m or less.
- the maximum height roughness Rz of the mat layer 11 is smaller than 0.05 ⁇ m, blocking with other members facing the optical film 1 easily occurs.
- the maximum height roughness Rz is greater than 8 ⁇ m, the effect of preventing damage to other members facing the optical film 1 and the uneven surface 11A of the mat layer 11 is reduced.
- the maximum height roughness Rz of the mat layer 11 is adjusted by, for example, the particle size and blending amount of the fine particles.
- the binder resin can be, for example, a resin excellent in optical transparency. More specifically, the binder resin is, for example, a polyester resin, an acrylic resin, an acrylic urethane resin, a polyester acrylate resin, a polyurethane acrylate resin, an epoxy acrylate resin, a urethane resin, an epoxy resin, or a polycarbonate resin.
- Thermosetting Resins It can be made of a radiation curable resin or the like.
- the binder resin is preferably an acrylic resin.
- the acrylic resin is excellent in light resistance and optical characteristics.
- the fine particles include, for example, silica, clay, talc, calcium carbonate, calcium sulfate, barium sulfate, aluminum silicate, titanium oxide, synthetic zeolite, alumina, smectite and other inorganic fine particles, polypropylene and other polyolefin resins, and nylon and other polyamide resins.
- the fine particles are preferably organic fine particles, and more preferably organic fine particles made of polyolefin resin, polyamide resin, or silicone resin. With organic fine particles, spherical particles are easily obtained, and shape control to a desired uneven shape is easy.
- the fine particles can be used in combination of not only the above-mentioned one type but also a plurality of types.
- the average particle diameter of the fine particles is preferably 0.5 ⁇ m or more and 10 ⁇ m or less. If the average particle size is smaller than 0.5 ⁇ m, blocking between the mat layer 11 and other backlight unit members tends to occur. On the other hand, when the average particle diameter exceeds 10 ⁇ m, the surface unevenness of the fine particles becomes large, so that the scratch resistance of other members tends to be reduced.
- the blending amount of the fine particles is preferably 2% by mass or more and 80% by mass or less, more preferably 5% by mass or more and 50% by mass or less based on the total solid content of the mat layer 11. If the blending amount is less than 2% by mass, blocking between the mat layer 11 and other backlight unit members tends to occur. On the other hand, if the blending amount exceeds 80% by mass, the scratch resistance of other members tends to decrease.
- the haze of the optical film 1 is controlled by the material, amount, particle size, etc. of the fine particles.
- An isocyanate curing agent may be added to the mat layer 11.
- the mat layer 11 can be thermally cured when a resin having a hydroxyl group is selected as the binder resin.
- the curing agent is not particularly limited as long as it is an isocyanate, but is based on an aliphatic isocyanate such as hexamethylene diisocyanate or xylylene diisocyanate that can be cross-linked with a hydroxyl group of an acrylic polyol resin. Toluene diisocyanate And those based on aromatic isocyanates such as diphenylmethane diisocyanate are preferably used.
- a conductive material may be added to the mat layer 11.
- the surface resistance value of the mat layer 11 decreases.
- the antistatic performance is favorably exhibited, so that the contamination of dust and the like into the mat layer 11 is reduced, and the backlight unit manufacturing process In such a case, scratches generated on the surface of the mat layer 11 and the like are reduced.
- the conductive material can include, for example, a quaternary ammonium salt, metal oxide particles, a conductive polymer, and the like.
- Quaternary ammonium salt, -N + X - has the structure.
- the quaternary ammonium salt causes the mat layer 11 to exhibit conductivity by including a quaternary ammonium cation (N + ) and an anion (X ⁇ ).
- Anions (X ⁇ ) of quaternary ammonium salts are, for example, Cl ⁇ , Br ⁇ , I ⁇ , F ⁇ , HSO 4 ⁇ , SO 4 2 ⁇ , NO 3 ⁇ , PO 4 3 ⁇ , HPO 4 2 ⁇ , HPO 2 PO 4 ⁇ , SO 3 ⁇ , OH ⁇ and the like.
- an acrylic material containing a quaternary ammonium salt as a functional group in the molecule is preferably used.
- This acrylic material is, for example, a monofunctional or polyfunctional (meth) acrylate such as an acrylic acid or methacrylic acid ester of a polyhydric alcohol containing a quaternary ammonium salt (—N + X ⁇ ) as a functional group in the molecule.
- a polyfunctional urethane (meth) acrylate compound synthesized from a diisocyanate and a polyhydric alcohol and a hydroxyester of acrylic acid or methacrylic acid is a monofunctional or polyfunctional (meth) acrylate such as an acrylic acid or methacrylic acid ester of a polyhydric alcohol containing a quaternary ammonium salt (—N + X ⁇ ) as a functional group in the molecule.
- the metal oxide particles include, for example, zirconium oxide, antimony-containing tin oxide (ATO), phosphorus-containing tin oxide (PTO), tin-containing indium oxide, aluminum oxide, cerium oxide, zinc oxide, aluminum-containing zinc oxide, tin oxide, and lithium. It can consist of the material which has as a main component 1 type, or 2 or more types of metal oxide selected from a salt, an antimony containing zinc oxide, and an indium containing zinc oxide.
- Conductive polymers include polyacetylene, polyaniline, polythiophene, polypyrrole, polyphenylene sulfide, poly (1,6-heptadiyne), polybiphenylene (polyparaphenylene), polyparaphenylene sulfide, polyphenylacetylene, poly (2,5-thienylene) ), And a derivative thereof, or a mixture of two or more thereof.
- the mat layer composition having the binder resin and fine particles may further contain, for example, a curing agent, a photopolymerization initiator, a leveling agent, a lubricant, a solvent, and the like in addition to the conductive material. .
- the mat layer composition is applied onto the first transparent film substrate 10.
- a roll coater for example, a reverse roll coater, a gravure coater, a micro gravure coater, a knife coater, a bar coater, a wire bar coater, a die coater, and a dip coater are used.
- a drying process is performed to remove the solvent remaining in the coating film of the mat layer composition.
- the drying process for example, heating and blowing of hot air are performed.
- the mat layer composition coating film that has been subjected to the drying treatment is subjected to a curing treatment by heating again or a curing treatment by ionizing radiation irradiation, whereby the mat layer 11 is formed.
- the ionizing radiation can be, for example, ultraviolet rays and electron beams.
- Ultraviolet rays are generated from a light source such as a high pressure mercury lamp, a low pressure mercury lamp, an ultrahigh pressure mercury lamp, a metal halide lamp, a carbon arc, and a xenon arc.
- the electron beam is generated from various electron beam accelerators such as a cockloftwald type, a bandegraph type, a resonant transformation type, an insulating core transformer type, a linear type, a dynamitron type, and a high frequency type.
- various electron beam accelerators such as a cockloftwald type, a bandegraph type, a resonant transformation type, an insulating core transformer type, a linear type, a dynamitron type, and a high frequency type.
- FIG. 2 is a schematic cross-sectional view of an optical barrier film according to an embodiment of the present invention.
- the optical barrier film can have, for example, three forms as shown in (a) to (c) of FIG.
- the secondA includes a barrier layer 12 and an optical film 1.
- the first optical barrier film 2 a has a configuration in which the optical film 1 is provided on the barrier layer 12, and the first surface 10 ⁇ / b> A of the first transparent film substrate 10 is bonded to the barrier layer 12.
- the barrier composite layer 13 includes a second transparent film substrate 15 and a barrier layer 12.
- the barrier composite layer 13, the adhesive layer 14, and the optical film 1 are provided in this order.
- the barrier layer 12 of the barrier composite layer 13 and the first transparent film substrate 10 of the optical film 1 Are bonded together by the adhesive layer 14.
- the third optical barrier film 2c in FIG. 2 (c) includes a barrier composite layer 13, an adhesive layer 14, and the optical film 1.
- the barrier composite layer 13, the adhesive layer 14, and the optical film 1 are provided in this order, and the second transparent film substrate 15 of the barrier composite layer 13 and the first transparent film of the optical film 1 are provided.
- the base material 10 is bonded by the adhesive layer 14.
- FIG. 3 is a schematic cross-sectional view of another optical barrier film according to an embodiment of the present invention.
- the optical barrier film can further include, for example, two forms as shown in FIGS. 3A and 3B, respectively.
- the fourth optical barrier film 3 a in FIG. 3A includes two barrier composite layers 13, two adhesive layers 14, and the optical film 1.
- the barrier composite layer 13, the adhesive layer 14, another barrier composite layer 13, another adhesive layer 14, and the optical film 1 are provided in this order.
- the second transparent film substrate 15 of the barrier composite layer 13 and the second transparent film substrate 15 of another barrier composite layer 13 are bonded together by the adhesive layer 14, and the barrier layer 12 of the other barrier composite layer 13 is bonded.
- the first transparent film substrate 10 of the optical film 1 are bonded together by another adhesive layer 14.
- the fifth optical barrier film 3b of FIG. 3B includes two barrier composite layers 13, two adhesive layers 14, and the optical film 1.
- the barrier composite layer 13, the adhesive layer 14, another barrier composite layer 13, another adhesive layer 14, and the optical film 1 are provided in this order.
- the barrier layer 12 of the barrier composite layer 13 and the barrier layer 12 of another barrier composite layer 13 are bonded together by the adhesive layer 14, and the second transparent film substrate 15 of the other barrier composite layer 13 and the optical film 1 are combined.
- the first transparent film substrate 10 is bonded to another adhesive layer 14.
- the barrier layer 12 is made of, for example, a deposited thin film layer.
- the material constituting the barrier layer 12 can be, for example, a metal and a metal oxide.
- the metal for the barrier layer 12 can be, for example, aluminum, copper, and silver.
- the metal oxide for the barrier layer 12 may be at least one selected from, for example, yttrium tantalum oxide, aluminum oxide, silicon oxide, and magnesium oxide.
- the metal oxide is preferably silicon oxide. Silicon oxide is inexpensive and has excellent barrier performance that blocks intrusion of water vapor and the like.
- the O / Si ratio of oxygen and silicon constituting the silicon oxide is preferably 1.0 or more and 2.0 or less in terms of atomic ratio.
- the barrier layer 12 made of silicon oxide is produced by a method such as vapor deposition or sputtering.
- the barrier layer 12 or the barrier composite layer 13 appropriately reduces the intrusion of air and water vapor.
- the barrier composite layer 13 has fewer scratches and defects generated in the process, and further reduces the intrusion of air and water vapor.
- FIG. 4 is a schematic cross-sectional view of a color conversion film according to an embodiment of the present invention.
- the color conversion film 4 includes a color conversion layer 16 and two second optical barrier films 2b.
- the color conversion film 4 has a configuration in which the color conversion layer 16 is sandwiched between two second optical barrier films 2b.
- the color conversion layer 16 has a third surface 16A and a fourth surface 16B opposite to the third surface 16A, and the second optical barrier is formed on the third surface 16A and the fourth surface 16B of the color conversion layer 16.
- the film 2b is bonded.
- the embodiment shown in FIG. 4 is an example of the color conversion film 4.
- the third optical surface 16 ⁇ / b> A and the fourth surface 16 ⁇ / b> B of the color conversion layer 16 have the same first optical.
- the barrier film 2a may be bonded, or the same third optical barrier film 2c may be bonded to the third surface 16A and the fourth surface 16B. Further, for example, the same fourth optical barrier film 3a or the same fifth optical barrier film 3b may be bonded to the third surface 16A and the fourth surface 16B of the color conversion layer 16.
- Semiconductor materials include, for example, II-VI, III-V, IV-VI, and IV semiconductors. More specifically, the semiconductor material is, for example, Si, Ge, Sn, Se, Te, B, C (including diamond), P, BN, BP, BAs, AlN, AlP, AlAs, AlSb, GaN, GaP.
- the mat layer 11 exhibits anti-blocking properties and scratch resistance, and the barrier composite layer 13 appropriately reduces the intrusion of air and water vapor. Is maintained over a long period of time.
- the backlight unit 5 can suppress the light guide plate 22 in contact with the color conversion film 4 from being damaged.
- the barrier layer itself is also prevented from being damaged, the penetration of air and water vapor into the color conversion layer is appropriately reduced, and good white light can be obtained from the backlight unit over a long period of time. .
- the light emitted from the light source 21 enters the light guide plate 22 (D1 direction), and then enters the color conversion layer 16 (D2 direction) with reflection and refraction.
- the light that has passed through the color conversion layer 16 becomes white light by mixing yellow light or red light and green light generated in the color conversion layer 16 with light before passing through the color conversion layer 16.
- Example 1 The 1st transparent film base material was produced using the 25-micrometer-thick polyethylene terephthalate film. Next, the mat layer composition was applied onto the first transparent film substrate, and a coating film was formed by a wire bar coater. Then, the heat processing which put this coating film for 30 second under the temperature of 80 degreeC were performed, and the coating film was dried. The dried coating film was aged at a temperature of 60 ° C. for 2 days to produce an optical film. The thickness of the mat layer was 3 ⁇ m.
- the mat layer composition was prepared by mixing 100 parts by weight of a binder resin, 10 parts by weight of fine particles, 8.5 parts by weight of an isocyanate curing agent, 2 parts by weight of a quaternary ammonium salt material, and 70 parts by weight of a solvent. .
- DIC's ACRICID A-814 (trade name) is used as the binder resin
- polypropylene having an average particle diameter of 3 ⁇ m is used as the fine particles
- Bernock DN-980 manufactured by DIC
- the quaternary ammonium salt material Kyoeisha Chemical's light ester DQ100 (trade name) was used.
- the solvent was ethyl acetate.
- Example 2 An optical film was produced in the same manner as in Example 1.
- a mat layer composition was prepared in the same manner as in Example 1.
- DIC's ACRICID A-814 (trade name) is used for the binder resin, urethane fine particles having an average particle diameter of 2 ⁇ m are used for the fine particles, and Bernock DN-980 made by DIC is used for the isocyanate curing agent.
- Kyoeisha Chemicals light ester DQ100 (trade name) was used as the quaternary ammonium salt material.
- the solvent was ethyl acetate.
- Example 3 An optical film was produced in the same manner as in Example 1.
- a mat layer composition was prepared in the same manner as in Example 1.
- the binder resin is ACRICID A-814 (trade name) manufactured by DIC
- the microparticles are urethane microparticles having an average particle size of 6 ⁇ m
- the isocyanate curing agent is Bernock DN-980 manufactured by DIC.
- Kyoeisha Chemicals light ester DQ100 (trade name) was used as the quaternary ammonium salt material.
- the solvent was ethyl acetate.
- Example 4 An optical film was produced in the same manner as in Example 1.
- a mat layer composition was prepared in the same manner as in Example 1.
- DIC's ACRICID A-814 (trade name) is used for the binder resin, nylon fine particles having an average particle diameter of 6 ⁇ m are used for the fine particles, and Bernock DN-980 made by DIC is used for the isocyanate curing agent.
- Kyoeisha Chemicals light ester DQ100 (trade name) was used as the quaternary ammonium salt material.
- the solvent was ethyl acetate.
- Example 5 An optical film was produced in the same manner as in Example 1.
- a mat layer composition was prepared in the same manner as in Example 1.
- DIC's ACRICID A-814 (trade name) is used for the binder resin, silicone fine particles having an average particle diameter of 8 ⁇ m are used for the fine particles, and Bernock DN-980 made by DIC is used for the isocyanate curing agent.
- Kyoeisha Chemicals light ester DQ100 (trade name) was used as the quaternary ammonium salt material.
- the solvent was ethyl acetate.
- Example 6 An optical film was produced in the same manner as in Example 1.
- a mat layer composition was prepared in the same manner as in Example 1.
- DIC's ACRICID A-814 (trade name) is used for the binder resin, acrylic fine particles having an average particle size of 0.8 ⁇ m are used for the fine particles, and Bernock DN made by DIC is used for the isocyanate curing agent. -980 was used, and Kyoeisha Chemical's light ester DQ100 (trade name) was used as the quaternary ammonium salt material.
- the solvent was ethyl acetate.
- Example 7 An optical film was produced in the same manner as in Example 1.
- a mat layer composition was prepared in the same manner as in Example 1.
- the binder resin is ACRICID A-814 (trade name) manufactured by DIC
- the fine particles are acrylic urethane-based fine particles having an average particle size of 10 ⁇ m
- the isocyanate curing agent is Bernock DN-DN-made by DIC. 980 was used
- Kyoeisha Chemical's light ester DQ100 (trade name) was used as the quaternary ammonium salt material.
- the solvent was ethyl acetate.
- Example 8 An optical film was produced in the same manner as in Example 1.
- the mat layer composition was prepared by mixing 100 parts by weight of a binder resin, 10 parts by weight of fine particles, 8.5 parts by weight of an isocyanate curing agent, 4 parts by weight of a lithium salt material, and 70 parts by weight of a solvent.
- the binder resin is ACRICID A-814 (trade name) manufactured by DIC
- the fine particles are urethane fine particles having an average particle diameter of 2 ⁇ m
- the quaternary lithium salt material is PEL-made by Nippon Carlit. 25 (trade name) was used.
- the solvent was ethyl acetate.
- Example 1 An optical film was produced in the same manner as in Example 1.
- a mat layer composition was prepared in the same manner as in Example 1.
- DIC's ACRICID A-814 (trade name) is used as the binder resin
- acrylic urethane-based fine particles having an average particle size of 15 ⁇ m are used as the fine particles
- Bernock DN-manufactured by DIC is used as the isocyanate curing agent.
- 980 was used, and Kyoeisha Chemical's light ester DQ100 (trade name) was used as the quaternary ammonium salt material.
- the solvent was ethyl acetate.
- Example 2 An optical film was produced in the same manner as in Example 1.
- a mat layer composition was prepared in the same manner as in Example 1.
- DIC's ACRICID A-814 (trade name) is used for the binder resin, acrylic fine particles having an average particle diameter of 20 ⁇ m are used for the fine particles, and Bernock DN-980 made by DIC is used for the isocyanate curing agent.
- Kyoeisha Chemicals light ester DQ100 (trade name) was used as the quaternary ammonium salt material.
- the solvent was ethyl acetate.
- Example 3 An optical film was produced in the same manner as in Example 1.
- a mat layer composition was prepared in the same manner as in Example 1.
- DIC's ACRICID A-814 (trade name) is used as the binder resin, urethane fine particles having an average particle diameter of 10 ⁇ m are used as the fine particles, and Bernock DN-980 made by DIC is used as the isocyanate curing agent.
- Kyoeisha Chemicals light ester DQ100 (trade name) was used as the quaternary ammonium salt material.
- the solvent was ethyl acetate.
- Example 4 An optical film was produced in the same manner as in Example 1.
- a mat layer composition was prepared in the same manner as in Example 1.
- DIC's ACRICID A-814 (trade name) is used for the binder resin, urethane fine particles having an average particle size of 15 ⁇ m are used for the fine particles, and Bernock DN-980 made by DIC is used for the isocyanate curing agent.
- Kyoeisha Chemicals light ester DQ100 (trade name) was used as the quaternary ammonium salt material.
- the solvent was ethyl acetate.
- Example 6 An optical film was produced in the same manner as in Example 1.
- the mat layer composition was prepared by mixing 100 parts by weight of a binder resin, 8.5 parts by weight of an isocyanate curing agent, 10 parts by weight of fine particles, and 70 parts by weight of a solvent.
- DIC's ACRICID A-814 (trade name) is used as the binder resin
- acrylic urethane-based fine particles having an average particle size of 15 ⁇ m are used as the fine particles
- Bernock DN-manufactured by DIC is used as the isocyanate curing agent. 980 was used.
- the solvent was ethyl acetate.
- Table 1 shows the static friction coefficient, the maximum height roughness Rz, the scratch resistance, the anti-blocking property, and the surface resistance value of the optical films obtained in Examples and Comparative Examples.
- the tribometer is Muse TYPE: 94i-II (trade name) manufactured by Shinto Kagaku. This tribometer has a brass slider that has been hard chrome treated.
- ⁇ Maximum height roughness Rz> About the optical film obtained by the Example and the comparative example, the maximum height roughness Rz prescribed
- R3300H Lite (trade name) manufactured by Ryoka System Co., Ltd. was used, and the surface shape in the range of 1 mm ⁇ 1 mm of the mat layer of the optical film was measured.
- the optical film mat layer and polycarbonate film obtained in the examples and comparative examples were left to stand for 30 seconds under a load of 25 kgf / cm 2 in a state where they were stacked so as to contact each other. Thereafter, the optical film and the polycarbonate film were observed visually and with a microscope to evaluate scratch resistance.
- the polycarbonate film was prepared by imitating the light guide plate of the backlight unit. The thickness of the polycarbonate film was 188 ⁇ m.
- the observation result in which no scratches were observed on the optical film mat layer and the polycarbonate film was evaluated as “A”, the observation result in which scratches were observed was evaluated as “B”, and the observation result in which scratches were remarkably recognized was “C”. It was evaluated.
- Anti-blocking property shows the difficulty of sticking of a film.
- the polycarbonate film was prepared by imitating the light guide plate of the backlight unit. The thickness of the polycarbonate film was 188 ⁇ m. The observation result in which blocking was not observed was evaluated as “A”, the observation result in which blocking was recognized was evaluated as “B”, and the observation result in which blocking was significantly recognized was evaluated as “C”.
- the high resistivity meter As the high resistivity meter, Hirester MCP-HT260 (trade name) manufactured by Dia Instruments was used.
- Examples 1 to 8 indicate that the static friction coefficient of the mat layer is 0.3 or less, and the maximum height roughness Rz defined in JIS B0601: 2013 is 0.00.
- the thickness is from 05 ⁇ m to 8 ⁇ m, it indicates that an optical film having scratch resistance in addition to anti-blocking properties can be obtained.
- This optical film can be suitably used for an optical barrier film and a color conversion film.
- an optical film including a mat layer, which is prevented from being scratched on the surface of the mat layer and other members facing the mat layer after preventing blocking with the other members facing the mat layer.
- An optical film is provided.
- the optical barrier film, color conversion film, and backlight unit which are excellent in barrier property further including this optical film are provided.
- SYMBOLS 1 Optical film, 2a ... 1st optical barrier film, 2b ... 2nd optical barrier film, 2c ... 3rd optical barrier film, 3a ... 4th optical barrier film, 3b ... 5th optical barrier film, 4 ... Color conversion film DESCRIPTION OF SYMBOLS 5 ... Backlight unit, 10 ... 1st transparent film base material, 10A ... 1st surface, 10B ... 2nd surface, 11 ... Matte layer, 11A ... Uneven surface, 11B ... Lower surface, 12 ... Barrier layer, 13 ... Barrier Composite layer, 14 ... adhesive layer, 15 ... second transparent film substrate, 16 ... color conversion layer, 16A ... third surface, 16B ... fourth surface, 21 ... light source, 22 ... light guide plate.
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Abstract
Description
図1は、本発明の実施形態に係る光学フィルムの模式断面図である。光学フィルム1は、第1透明フィルム基材10とマット層11とを備える。第1透明フィルム基材10は、第1面10Aと、第1面10Aに対向する第2面10Bを有する。マット層11は、凹凸形状を有する凹凸面11Aと下面11Bとを有する。マット層11の下面11Bと第1透明フィルム基材10の第2面10Bとが貼り合わされて、マット層11が、第1透明フィルム基材10上に設けられる。
本発明で用いられる第1透明フィルム基材10は、例えば、有機高分子フィルムからなることができる。具体的には、第1透明フィルム基材10は、例えば、ポリエチレン、ポリプロピレン等のポリオレフィン系、ポリエチレンテレフタレート、ポリエチレンナフタレート等のポリエステル系、トリアセチルセルロース、ジアセチルセルロース、セロファン等のセルロース系、6-ナイロン、6,6-ナイロン等のポリアミド系、ポリメチルメタクリレート等のアクリル系、ポリスチレン、ポリ塩化ビニル、ポリイミド、ポリビニルアルコール、ポリカーボネート、及びエチレンビニルアルコールなどの有機高分子からなることができる。
マット層11を作製するためのマット層組成物は、例えば、バインダー樹脂と微粒子とを含む。マット層11の凹凸面11Aの凹凸形状は、例えば、微粒子によって形成される。第1透明フィルム基材10上にマット層11が設けられると、光学フィルム1が、例えば、バックライトユニット用の部材として用いられたときに、光学フィルム1に対向する他の部材とのブロッキング(貼り付き)が好適に防止される。また、光学フィルム1において、第1透明フィルム基材10上にマット層11が設けられると、光学フィルム1に対向する他の部材、及びマット層11の凹凸面11Aに対する傷付け防止効果が増大する。マット層11の厚みは、例えば、0.5μm以上30μm以下であることが好ましい。マット層11の厚みは、JIS K5600に則り、質量法により測定される。マット層11が、この範囲の厚みを有すると、マット層11の凹凸面11Aにおいて凹凸形状が形成し易くなる。マット層11の凹凸面11Aの凹凸形状は、微粒子による方法以外にも、例えば、エンボス加工を施すことによっても形成される。また、この凹凸形状は、例えば、バインダー樹脂などの樹脂を相分離させて、マット層11に海島構造を作ることによっても形成される。このようなエンボス加工や相分離等の方法により凹凸形状を形成する場合、マット層11は微粒子を含んでいてもよいし、含んでいなくてもよい。
バインダー樹脂は、例えば、光学的透明性に優れた樹脂であることができる。バインダー樹脂は、より具体的には、例えば、ポリエステル系樹脂、アクリル系樹脂、アクリルウレタン系樹脂、ポリエステルアクリレート系樹脂、ポリウレタンアクリレート系樹脂、エポキシアクリレート系樹脂、ウレタン系樹脂、エポキシ系樹脂、ポリカーボネート系樹脂、セルロース系樹脂、アセタール系樹脂、ポリエチレン系樹脂、ポリスチレン系樹脂、ポリアミド系樹脂、ポリイミド系樹脂、メラミン系樹脂、フェノール系樹脂、シリコーン系樹脂などの熱可塑性樹脂、熱硬化性樹脂、及び電離放射線硬化性樹脂などからなることができる。バインダー樹脂は、アクリル系樹脂であることが好ましい。アクリル系樹脂は、耐光性及び光学特性などに優れる。
微粒子は、例えば、シリカ、クレー、タルク、炭酸カルシウム、硫酸カルシウム、硫酸バリウム、珪酸アルミニウム、酸化チタン、合成ゼオライト、アルミナ、スメクタイトなどの無機微粒子、及び、ポリプロピレンなどのポリオレフィン樹脂、ナイロンなどのポリアミド樹脂、アクリルウレタン樹脂、スチレン樹脂、ウレタン樹脂、ベンゾグアナミン樹脂、シリコーン樹脂、アクリル樹脂などからなる有機微粒子であることができる。微粒子は、有機微粒子であることが好ましく、ポリオレフィン樹脂、ポリアミド樹脂、又はシリコーン樹脂からなる有機微粒子であることがより好ましい。有機微粒子では、球状粒子が得られやすく、また、所望の凹凸形状への形状制御が容易である。微粒子は、上記の1種だけでなく、複数種を組み合わせて使用されることができる。
マット層11には、イソシアネート硬化剤が添加されてもよい。イソシアネート硬化剤が添加されると、バインダー樹脂に水酸基を有する樹脂を選んだ場合に、マット層11を熱硬化させることが出来る。硬化剤は、イソシアネート系であれば特に限定されないが、アクリル系ポリオール樹脂の水酸基と架橋することが可能な、ヘキサメチレンジイソシアネート系、キシリレンジイソシアネート系などの脂肪族イソシアネートをベースにしたもの、トルエンジイソシアネート系、ジフェニルメタンジイソシアネート系などの芳香族イソシアネートをベースにしたものが好適に使用される。
マット層11には、導電性材料が添加されてもよい。導電性材料が添加されると、マット層11の表面抵抗値が低下する。マット層11の表面抵抗値が1.0×1013Ω/□以下になると、帯電防止性能が好適に発現するので、マット層11への塵埃等の混入が減少し、バックライトユニットの製造工程などにおいて、マット層11などの表面に生じる傷付きが減少する。導電性材料は、例えば、四級アンモニウム塩、金属酸化物粒子、及び導電性高分子などを含むことができる。
マット層11の作製工程では、初めに、マット層組成物が、第1透明フィルム基材10上に塗工される。この塗工には、例えば、ロールコーター、リバースロールコーター、グラビアコーター、マイクログラビアコーター、ナイフコーター、バーコーター、ワイヤーバーコーター、ダイコーター、及びディップコーターなどが用いられる。
図2は、本発明の実施形態に係る光学バリアフィルムの模式断面図である。光学バリアフィルムは、例えば、図2の(a)~(c)にそれぞれ示されるような3形態を備えることができる。
図4は、本発明の実施形態に係る色変換フィルムの模式断面図である。図4では、色変換フィルム4は、色変換層16と、二つの第2光学バリアフィルム2bとを備える。色変換フィルム4は、二つの第2光学バリアフィルム2bによって、色変換層16が挟まれる構成を有している。色変換層16は、第3面16Aと、第3面16Aとは反対側の第4面16Bとを有し、色変換層16の第3面16A及び第4面16Bに、第2光学バリアフィルム2bが貼り合わされている。
図5は、本発明の実施形態に係るバックライトユニットの模式断面図である。図5において、バックライトユニット5は、光源21と、導光板22と、該導光板上に配置された色変換フィルム4と、反射板23とを備える。色変換フィルム4は、凹凸面4A(又は、凹凸面4B)(すなわち、マット層11)が導光板22と接するように配置されている。詳細には、色変換フィルム4の凹凸面4A上に導光板22及び反射板23がこの順で配置され、光源21は導光板22の側方(導光板22の面方向)に配置される。バックライトユニット5は、色変換フィルム4が接する導光板22が傷付くことを抑制することができる。また、バリア層自身が傷付くことも抑制されることから、色変換層に空気及び水蒸気の侵入が適切に低減されて、バックライトユニットから長期間に亘って良好な白色光を得ることができる。
厚み25μmのポリエチレンテレフタレートフィルムを用いて、第1透明フィルム基材を作製した。次いで、マット層組成物を第1透明フィルム基材上に塗布し、ワイヤーバーコーターによって塗膜を形成した。続いて、この塗膜を80℃の温度下に30秒間置く加熱処理を施して、塗膜を乾燥させた。この乾燥した塗膜に対して、60℃の温度下に2日間置くというエージングを行って、光学フィルムを作製した。マット層の厚みは、3μmであった。
実施例1と同様の手法により、光学フィルムを作製した。また、実施例1と同様の手法により、マット層組成物を作製した。バインダー樹脂には、DIC社製のアクリディックA-814(商品名)を用い、微粒子には、平均粒径2μmのウレタン系微粒子を用い、イソシアネート硬化剤には、DIC社製のバーノックDN-980を用い、四級アンモニウム塩材料には、共栄社化学製のライトエステルDQ100(商品名)を用いた。溶剤は、酢酸エチルとした。
実施例1と同様の手法により、光学フィルムを作製した。また、実施例1と同様の手法により、マット層組成物を作製した。バインダー樹脂には、DIC社製のアクリディックA-814(商品名)を用い、微粒子には、平均粒径6μmのウレタン系微粒子を用い、イソシアネート硬化剤には、DIC社製のバーノックDN-980を用い、四級アンモニウム塩材料には、共栄社化学製のライトエステルDQ100(商品名)を用いた。溶剤は、酢酸エチルとした。
実施例1と同様の手法により、光学フィルムを作製した。また、実施例1と同様の手法により、マット層組成物を作製した。バインダー樹脂には、DIC社製のアクリディックA-814(商品名)を用い、微粒子には、平均粒径6μmのナイロン系微粒子を用い、イソシアネート硬化剤には、DIC社製のバーノックDN-980を用い、四級アンモニウム塩材料には、共栄社化学製のライトエステルDQ100(商品名)を用いた。溶剤は、酢酸エチルとした。
実施例1と同様の手法により、光学フィルムを作製した。また、実施例1と同様の手法により、マット層組成物を作製した。バインダー樹脂には、DIC社製のアクリディックA-814(商品名)を用い、微粒子には、平均粒径8μmのシリコーン系微粒子を用い、イソシアネート硬化剤には、DIC社製のバーノックDN-980を用い、四級アンモニウム塩材料には、共栄社化学製のライトエステルDQ100(商品名)を用いた。溶剤は、酢酸エチルとした。
実施例1と同様の手法により、光学フィルムを作製した。また、実施例1と同様の手法により、マット層組成物を作製した。バインダー樹脂には、DIC社製のアクリディックA-814(商品名)を用い、微粒子には、平均粒径0.8μmのアクリル系微粒子を用い、イソシアネート硬化剤には、DIC社製のバーノックDN-980を用い、四級アンモニウム塩材料には、共栄社化学製のライトエステルDQ100(商品名)を用いた。溶剤は、酢酸エチルとした。
実施例1と同様の手法により、光学フィルムを作製した。また、実施例1と同様の手法により、マット層組成物を作製した。バインダー樹脂には、DIC社製のアクリディックA-814(商品名)を用い、微粒子には、平均粒径10μmのアクリルウレタン系微粒子を用い、イソシアネート硬化剤には、DIC社製のバーノックDN-980を用い、四級アンモニウム塩材料には、共栄社化学製のライトエステルDQ100(商品名)を用いた。溶剤は、酢酸エチルとした。
実施例1と同様の手法により、光学フィルムを作製した。マット層組成物は、バインダー樹脂の100質量部、微粒子の10質量部、イソシアネート硬化剤の8.5質量部、リチウム塩材料の4質量部、及び溶剤の70質量部の混合によって作製した。バインダー樹脂には、DIC社製のアクリディックA-814(商品名)を用い、微粒子には、平均粒径2μmのウレタン系微粒子を用い、四級リチウム塩材料には、日本カーリット製のPEL-25(商品名)を用いた。溶剤は、酢酸エチルとした。
実施例1と同様の手法により、光学フィルムを作製した。また、実施例1と同様の手法により、マット層組成物を作製した。バインダー樹脂には、DIC社製のアクリディックA-814(商品名)を用い、微粒子には、平均粒径15μmのアクリルウレタン系微粒子を用い、イソシアネート硬化剤には、DIC社製のバーノックDN-980を用い、四級アンモニウム塩材料には、共栄社化学製のライトエステルDQ100(商品名)を用いた。溶剤は、酢酸エチルとした。
実施例1と同様の手法により、光学フィルムを作製した。また、実施例1と同様の手法により、マット層組成物を作製した。バインダー樹脂には、DIC社製のアクリディックA-814(商品名)を用い、微粒子には、平均粒径20μmのアクリル系微粒子を用い、イソシアネート硬化剤には、DIC社製のバーノックDN-980を用い、四級アンモニウム塩材料には、共栄社化学製のライトエステルDQ100(商品名)を用いた。溶剤は、酢酸エチルとした。
実施例1と同様の手法により、光学フィルムを作製した。また、実施例1と同様の手法により、マット層組成物を作製した。バインダー樹脂には、DIC社製のアクリディックA-814(商品名)を用い、微粒子には、平均粒径10μmのウレタン系微粒子を用い、イソシアネート硬化剤には、DIC社製のバーノックDN-980を用い、四級アンモニウム塩材料には、共栄社化学製のライトエステルDQ100(商品名)を用いた。溶剤は、酢酸エチルとした。
実施例1と同様の手法により、光学フィルムを作製した。また、実施例1と同様の手法により、マット層組成物を作製した。バインダー樹脂には、DIC社製のアクリディックA-814(商品名)を用い、微粒子には、平均粒径15μmのウレタン系微粒子を用い、イソシアネート硬化剤には、DIC社製のバーノックDN-980を用い、四級アンモニウム塩材料には、共栄社化学製のライトエステルDQ100(商品名)を用いた。溶剤は、酢酸エチルとした。
実施例1と同様の手法により、光学フィルムを作製した。マット層組成物は、バインダー樹脂の100質量部、イソシアネート硬化剤の8.5質量部、四級アンモニウム塩材料の2質量部、及び溶剤の70質量部の混合によって作製した。バインダー樹脂には、DIC社製のアクリディックA-814(商品名)を用い、イソシアネート硬化剤には、DIC社製のバーノックDN-980を用い、四級アンモニウム塩材料には、共栄社化学製のライトエステルDQ100(商品名)を用いた。溶剤は、酢酸エチルとした。
実施例1と同様の手法により、光学フィルムを作製した。マット層組成物は、バインダー樹脂の100質量部、イソシアネート硬化剤の8.5質量部、微粒子の10質量部、及び溶剤の70質量部の混合によって作製した。バインダー樹脂には、DIC社製のアクリディックA-814(商品名)を用い、微粒子には、平均粒径15μmのアクリルウレタン系微粒子を用い、イソシアネート硬化剤には、DIC社製のバーノックDN-980を用いた。溶剤は、酢酸エチルとした。
本発明の実施形態に係る光学フィルムの評価結果を表1に示す。表1は、実施例及び比較例で得られた光学フィルムの静摩擦係数、最大高さ粗さRz、傷付け防止性、アンチブロッキング性、及び表面抵抗値を示す。
実施例及び比較例で得られた光学フィルムのマット層について、摩擦計を用いてマット層の静摩擦係数を測定した。摩擦計は、新東科学社製のミューズTYPE:94i-II(商品名)である。この摩擦計は、ハードクロム処理がなされた黄銅スライダを有する。
実施例及び比較例で得られた光学フィルムについて、非接触表面・層断面形状計測システムを用いて、JIS B0601:2013に規定される最大高さ粗さRzを求めた。非接触表面・層断面形状計測システムには、菱化システム社製のR3300H Lite(商品名)を用い、光学フィルムのマット層の1mm×1mmの範囲における表面形状を計測した。
実施例及び比較例で得られた光学フィルムのマット層とポリカーボネートフィルムとを、互いに接するように重ねた状態で、25kgf/cm2の荷重下に30秒間放置した。その後、光学フィルムとポリカーボネートフィルムとを目視および顕微鏡によって観察して、傷付け防止性を評価した。ポリカーボネートフィルムは、バックライトユニットの導光板を模して用意した。ポリカーボネートフィルムの厚みは188μmであった。光学フィルムのマット層及びポリカーボネートフィルムに傷が認められない観察結果を「A」と評価し、傷が認められる観察結果を「B」と評価し、傷が顕著に認められる観察結果を「C」と評価した。
実施例及び比較例で得られた光学フィルムのマット層とポリカーボネートフィルムとを、互いに接するように重ねた状態で、50kgf/cm2の荷重下、且つ60℃の環境下に2時間放置した。その後、光学フィルムとポリカーボネートフィルムとを目視によって観察して、アンチブロッキング性を評価した。アンチブロッキング性は、フィルムの貼り付き難さを示す。ポリカーボネートフィルムは、バックライトユニットの導光板を模して用意した。ポリカーボネートフィルムの厚みは188μmであった。ブロッキングが認められない観察結果を「A」と評価し、ブロッキングが認められる観察結果を「B」と評価し、ブロッキングが顕著に認められる観察結果を「C」と評価した。
実施例及び比較例で得られた光学フィルムのマット層の表面について、高抵抗抵抗率計を用い、JIS K6911に準拠して表面抵抗値を測定した。高抵抗抵抗率計には、ダイアインスツルメンツ社製のハイレスターMCP-HT260(商品名)を用いた。
Claims (9)
- 透明フィルム基材と、
該透明フィルム基材の上に配置され、凹凸形状を有するマット層と、
を備え、
前記マット層の静摩擦係数が0.3以下であり、
前記マット層の最大高さ粗さRzが0.05μm以上8μm以下である、光学フィルム。 - 前記マット層が、バインダー樹脂と微粒子とを含み、
前記微粒子の平均粒子径が0.5μm以上10μm以下である、請求項1に記載の光学フィルム。 - 前記マット層が、四級アンモニウム塩材料、導電性高分子、及び金属酸化物粒子からなる群より選択される少なくとも1種を含む、請求項1又は2に記載の光学フィルム。
- 前記マット層の表面抵抗値が1.0×1013Ω/□以下である、請求項1~3のいずれか一項に記載の光学フィルム。
- バリア層と、請求項1~4のいずれか一項に記載の光学フィルムとを備え、
前記バリア層は、前記光学フィルムにおける前記透明フィルム基材の前記マット層側とは反対側の面上に配置される、光学バリアフィルム。 - 透明フィルム基材及びバリア層を有するバリア複合層と、請求項1~4のいずれか一項に記載の光学フィルムとを備え、
前記バリア複合層は、前記光学フィルムにおける前記透明フィルム基材の前記マット層側とは反対側の面上に配置される、光学バリアフィルム。 - 前記バリア層が、SiOx(1.0≦x≦2.0)で表されるシリコン酸化物を含む、請求項5又は6に記載の光学バリアフィルム。
- 色変換層と、該色変換層を挟むように配置される二つの光学バリアフィルムとを備え、
前記二つの光学バリアフィルムの少なくとも一方が、請求項5~7のいずれか一項に記載の光学バリアフィルムである、色変換フィルム。 - 光源と、導光板と、該導光板上に配置された請求項8に記載の色変換フィルムと、を備え、
前記色変換フィルムは、前記マット層が前記導光板と接するように配置されている、バックライトユニット。
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- 2015-11-10 KR KR1020177013249A patent/KR102545627B1/ko active Active
- 2015-11-10 CN CN201580061835.0A patent/CN107148340A/zh active Pending
- 2015-11-10 EP EP15858840.0A patent/EP3219482B1/en active Active
- 2015-11-10 WO PCT/JP2015/081637 patent/WO2016076322A1/ja not_active Ceased
- 2015-11-12 TW TW104137270A patent/TWI661235B/zh active
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| JP2018022092A (ja) * | 2016-08-05 | 2018-02-08 | 大日本印刷株式会社 | 波長変換シート用バリアフィルム、波長変換シート用バリアフィルムを用いた波長変換シート、及びを備えたバックライト光源を用いた表示装置 |
| US11397287B2 (en) | 2016-12-06 | 2022-07-26 | Toppan Printing Co., Ltd. | Optical film, and optical barrier film, color conversion film and backlight unit using the optical film |
| JP2018111809A (ja) * | 2017-01-06 | 2018-07-19 | 積水化学工業株式会社 | アンチブロッキング剤及びアンチブロッキングフィルム |
| JP7063611B2 (ja) | 2017-01-06 | 2022-05-09 | 積水化学工業株式会社 | アンチブロッキング剤及びアンチブロッキングフィルム |
| WO2019172384A1 (ja) * | 2018-03-07 | 2019-09-12 | 凸版印刷株式会社 | 光学フィルム、光学バリアフィルム、及びバックライトユニット |
| JPWO2019172384A1 (ja) * | 2018-03-07 | 2021-03-25 | 凸版印刷株式会社 | 光学フィルム、光学バリアフィルム、及びバックライトユニット |
| JP7331830B2 (ja) | 2018-03-07 | 2023-08-23 | 凸版印刷株式会社 | 光学フィルム、光学バリアフィルム、及びバックライトユニット |
| JP2020187357A (ja) * | 2019-05-13 | 2020-11-19 | 大日本印刷株式会社 | バリアフィルム、それを用いた波長変換シート、及びそれを用いた表示装置 |
| JP7310700B2 (ja) | 2019-05-13 | 2023-07-19 | 大日本印刷株式会社 | バリアフィルム、それを用いた波長変換シート、及びそれを用いた表示装置 |
| JP6798655B1 (ja) * | 2019-06-14 | 2020-12-09 | 昭和電工マテリアルズ株式会社 | 波長変換部材及びその使用、バックライトユニット、並びに画像表示装置 |
| WO2020250414A1 (ja) * | 2019-06-14 | 2020-12-17 | 昭和電工マテリアルズ株式会社 | 波長変換部材及びその使用、バックライトユニット、並びに画像表示装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3219482A4 (en) | 2018-07-11 |
| KR20170086506A (ko) | 2017-07-26 |
| TW201621353A (zh) | 2016-06-16 |
| JPWO2016076322A1 (ja) | 2017-08-24 |
| US11243335B2 (en) | 2022-02-08 |
| TWI661235B (zh) | 2019-06-01 |
| US20170235025A1 (en) | 2017-08-17 |
| CN107148340A (zh) | 2017-09-08 |
| EP3219482B1 (en) | 2024-02-07 |
| EP3219482A1 (en) | 2017-09-20 |
| KR102545627B1 (ko) | 2023-06-21 |
| JP6572906B2 (ja) | 2019-09-11 |
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