WO2017057287A1 - 色変換フィルムならびにそれを含む光源ユニット、ディスプレイおよび照明装置 - Google Patents
色変換フィルムならびにそれを含む光源ユニット、ディスプレイおよび照明装置 Download PDFInfo
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- WO2017057287A1 WO2017057287A1 PCT/JP2016/078296 JP2016078296W WO2017057287A1 WO 2017057287 A1 WO2017057287 A1 WO 2017057287A1 JP 2016078296 W JP2016078296 W JP 2016078296W WO 2017057287 A1 WO2017057287 A1 WO 2017057287A1
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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
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/844—Encapsulations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/873—Encapsulations
Definitions
- the present invention relates to a color conversion film, a light source unit including the color conversion film, a display, and a lighting device.
- Color conversion refers to conversion of light emitted from a light emitter into light having a longer wavelength, and represents, for example, conversion of blue light emission into green or red light emission.
- this film having a color conversion function By combining this film having a color conversion function with, for example, a blue light source, it is possible to extract the three primary colors of blue, green, and red from the blue light source, that is, to extract white light.
- a white light source combining such a blue light source and a film having a color conversion function is used as a light source unit, and a combination of the light source unit, a liquid crystal driving portion, and a color filter makes it possible to produce a full color display.
- a white light source if there is no liquid crystal drive part, it can be used as a white light source as it is, for example, it can be applied as a white light source such as LED lighting.
- An improvement in color reproducibility is an issue for liquid crystal displays that use color conversion methods.
- it is effective to narrow the half-value width of each emission spectrum of blue, green, and red of the light source unit and increase the color purity of each color of blue, green, and red.
- a technique using an organic light-emitting material as a component of a color conversion film instead of quantum dots has been proposed.
- techniques using an organic light emitting material as a component of a color conversion film include those using a pyridine-phthalimide condensate (for example, see Patent Document 2), those using a coumarin derivative (for example, see Patent Document 3), As for red light emitting materials, those using a perylene derivative so far (for example, see Patent Document 4), those using a rhodamine derivative (for example, see Patent Document 5), those using a pyromethene derivative (for example, Patent Documents 6 to 6) 7).
- the problem to be solved by the present invention is to achieve both improvement in color reproducibility and durability in a color conversion film used for a display, a lighting device, and the like. It is to achieve both durability.
- the color conversion film according to the present invention is a color conversion film that converts incident light into light having a longer wavelength than the incident light, and is at least the following ( It is a laminated film including the A) layer and the (B) layer.
- the (A) layer and the (B) layer are laminated in the order of the (B) layer, the (A) layer, and the (B) layer. It is characterized by being made.
- the color conversion film according to the present invention is characterized in that, in the above-mentioned invention, the transparent resin constituting the layer (B) contains polyvinyl alcohol or an ethylene-vinyl alcohol copolymer.
- the color conversion film according to the present invention is characterized in that, in the above invention, the transparent resin constituting the layer (B) is a polyol resin.
- the transparent resin constituting the layer (B) is a polyol resin, and the polyol resin has a hydroxyl group weight ratio of 20% in the resin. It is the resin which is the above.
- the transparent resin constituting the layer (B) is a polyol resin
- the polyol resin is polyvinyl alcohol or an ethylene-vinyl alcohol copolymer. It is characterized by that.
- the (B) layer includes a polyol resin, a resin composition containing a silicon compound represented by the general formula (6) and a hydrolyzate thereof, and It is the hardened
- R 12 may be the same or different, and is selected from the group consisting of hydrogen, an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, and a silyl group.
- L 1 may be the same or different, Selected from a single bond, an alkylene group, and a phenylene group, each Y may be the same or different, and hydrogen, alkyl group, cycloalkyl group, heterocyclic group, alkenyl group, cycloalkenyl group, alkynyl group, hydroxyl group, thiol group Glycidyl group, alkoxy group, alkylthio group, glycidyl ether group, aryl ether group, aryl thioether group, aryl group, heteroaryl group, halogen, cyano group, aldehyde group, carbonyl group, carboxyl group, oxycarbonyl group, carbamoyl group,
- the color conversion film according to the present invention is characterized in that, in the above invention, the silicon atom content in the layer (B) is 1 wt% or more and 20 wt% or less.
- the color conversion film according to the present invention is characterized in that, in the above invention, the thickness of the layer (B) is 100 ⁇ m or less.
- the color conversion film according to the present invention is characterized in that, in the above invention, the organic light emitting material contains a compound represented by the general formula (1).
- R 1 to R 9 may be the same or different and each represents hydrogen, an alkyl group, a cycloalkyl group, a heterocyclic group, an alkenyl group, a cycloalkenyl group, or an alkynyl group.
- X is C—R 7 and R 7 is a group represented by the general formula (2).
- R is hydrogen, alkyl group, cycloalkyl group, heterocyclic group, alkenyl group, cycloalkenyl group, alkynyl group, hydroxyl group, thiol group, alkoxy group, alkylthio group, aryl ether group, aryl thioether group, aryl group, hetero It is selected from the group consisting of an aryl group, halogen, cyano group, aldehyde group, carbonyl group, carboxyl group, oxycarbonyl group, carbamoyl group, amino group, nitro group, silyl group, siloxanyl group, boryl group, and phosphine oxide group. Is an integer of 1 to 3. When k is 2 or more, r may be the same or different.
- R 1 , R 3 , R 4, and R 6 in the general formula (1) may be the same or different, and may be substituted or unsubstituted. It is a phenyl group.
- R 1 , R 3 , R 4, and R 6 in the general formula (1) may be the same or different, and may be substituted or unsubstituted. It is an alkyl group.
- the light source unit according to the present invention includes a light source and the color conversion film according to any one of the above inventions.
- the light source unit according to the present invention is characterized in that, in the above invention, the light source is a light emitting diode having a maximum light emission in a range of 430 nm to 500 nm.
- a display according to the present invention includes the light source unit according to any one of the above-described inventions.
- an illumination device includes the light source unit according to any one of the above inventions.
- the color conversion film according to the present invention achieves both high color reproducibility and high durability since it has both high color purity light emission and durability. Since the light source unit, the display, and the illumination device according to the present invention use such a color conversion film, there is an effect that both high color reproducibility and high durability can be achieved.
- FIG. 1 is a schematic cross-sectional view showing an example of a color conversion film according to an embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view showing another example of the color conversion film according to the embodiment of the present invention.
- FIG. 3 is a schematic cross-sectional view showing still another example of the color conversion film according to the embodiment of the present invention.
- FIG. 4 is a diagram illustrating an absorption spectrum of the compound of Synthesis Example 1 in the example of the present invention.
- FIG. 5 is a diagram illustrating an emission spectrum of the compound of Synthesis Example 1 in the example of the present invention.
- FIG. 6 is a diagram illustrating an absorption spectrum of the compound of Synthesis Example 2 in the example of the present invention.
- FIG. 7 is a diagram illustrating an emission spectrum of the compound of Synthesis Example 2 in the example of the present invention.
- the color conversion film according to the embodiment of the present invention converts incident light from a light emitter such as a light source into light having a longer wavelength than the incident light, and is at least a color conversion layer (A). It is a laminated film including a layer and a layer (B) which is a transparent resin layer having oxygen barrier properties.
- the color conversion film may include a plurality of layers (A) and (B). When a plurality of layers are included, the composition, function, and film thickness may be the same or different. Good.
- a color conversion layer (first (A) layer) that converts blue light from a light emitter into green light
- A) layer a plurality of types of (A) layers having different functions from each other may be included in the color conversion film.
- a plurality of types of (B) layers having different compositions such as a first (B) layer and a second (B) layer made of different resins, may be included in the color conversion film. .
- FIG. 1 is a schematic cross-sectional view showing an example of a color conversion film according to an embodiment of the present invention.
- a color conversion film 1 illustrated in FIG. 1 is a laminate of a base layer 10, a color conversion layer 11, and an oxygen barrier transparent resin layer 12.
- a laminate of the color conversion layer 11 and the oxygen barrier transparent resin layer 12 is formed on the base layer 10 in the order of the color conversion layer 11 and the oxygen barrier transparent resin layer 12. It is laminated. That is, the laminate of the color conversion layer 11 and the oxygen barrier transparent resin layer 12 illustrated in FIG. 1 is a laminate in which the (B) layer / (A) layer are laminated in this order.
- FIG. 2 is a schematic cross-sectional view showing another example of the color conversion film according to the embodiment of the present invention.
- a color conversion film 1 illustrated in FIG. 2 is a laminate of a base layer 10, a color conversion layer 11, and a plurality of oxygen barrier transparent resin layers 12.
- a laminate of the color conversion layer 11 and the plurality of oxygen barrier transparent resin layers 12 is formed on the base material layer 10, the oxygen barrier transparent resin layer 12, the color conversion layer 11, The oxygen barrier transparent resin layer 12 is laminated in this order. That is, the laminate of the color conversion layer 11 and the plurality of oxygen-barrier transparent resin layers 12 illustrated in FIG. 2 is a laminate in which (B) layer / (A) layer / (B) layer are laminated in this order.
- FIG. 3 is a schematic cross-sectional view showing still another example of the color conversion film according to the embodiment of the present invention.
- the color conversion film 1 illustrated in FIG. 3 is a laminate of a plurality of base material layers 10, a color conversion layer 11 and a plurality of oxygen barrier transparent resin layers 12.
- a laminate of the color conversion layer 11 and the plurality of oxygen barrier transparent resin layers 12 is formed on the base material layer 10, the oxygen barrier transparent resin layer 12, the color conversion layer 11, The oxygen barrier transparent resin layer 12 is laminated in this order. That is, the laminate of the color conversion layer 11 and the plurality of oxygen-barrier transparent resin layers 12 illustrated in FIG.
- the color conversion film 1 illustrated in FIG. 3 is a laminate in which a laminate of the color conversion layer 11 and the plurality of oxygen barrier transparent resin layers 12 is sandwiched between the plurality of base material layers 10.
- the color conversion layer 11 corresponds to the (A) layer in the present invention.
- the oxygen barrier transparent resin layer 12 is a transparent resin layer having an oxygen barrier property that suppresses oxygen permeation, and corresponds to the layer (B) in the present invention.
- the layer (A) included in the color conversion film according to the embodiment of the present invention contains at least one organic light emitting material and a binder resin, and converts incident light into light having a longer wavelength than the incident light. Functions as a color conversion layer.
- the layer (A) included in the color conversion film according to the embodiment of the present invention is a continuous layer.
- the continuous layer refers to a layer that is not divided.
- a layer containing an organic light emitting material and a binder resin is patterned and present in the same plane, it is a divided layer and therefore does not correspond to the continuous layer referred to in the present invention.
- a cut or a dent partially, but it is a structure that is integrated as a whole, it corresponds to a continuous layer.
- the thickness of the (A) layer is not particularly limited, but is preferably 10 to 1000 ⁇ m from the viewpoint of film toughness and ease of forming. On the other hand, from the viewpoint of improving heat resistance, the thickness of the layer (A) is preferably 200 ⁇ m or less, more preferably 100 ⁇ m or less, and even more preferably 50 ⁇ m or less.
- the film thickness of each layer in the present invention is the film thickness (average film thickness) measured based on the method A of measuring thickness by mechanical scanning in JIS K7130 (1999) plastic-film and sheet-thickness measuring method. That means. The same applies to the following description.
- the layer (A) includes at least one organic light emitting material.
- the light emitting material in the present invention refers to a material that emits light having a wavelength different from the wavelength of the light when irradiated with some light. In order to achieve high-efficiency color conversion, it is preferable that the light-emitting material exhibits light emission characteristics with a high quantum yield.
- the luminescent material include known luminescent materials such as inorganic phosphors, fluorescent pigments, fluorescent dyes, and quantum dots. From the viewpoint of uniformity of dispersion, reduction of usage, and reduction of environmental load, the present invention. In this case, an organic light emitting material is used.
- organic light emitting material examples include those shown below.
- a compound having a condensed aryl ring such as naphthalene, anthracene, phenanthrene, pyrene, chrysene, naphthacene, triphenylene, perylene, fluoranthene, fluorene, and indene, and derivatives thereof can be cited as suitable organic light emitting materials.
- a compound having a heteroaryl ring such as pyrrolopyridine, a derivative thereof, and a borane derivative can be cited as a suitable organic light emitting material.
- Suitable organic light emitting materials include stilbene derivatives such as amino) stilbene, aromatic acetylene derivatives, tetraphenylbutadiene derivatives, aldazine derivatives, pyromethene derivatives, and diketopyrrolo [3,4-c] pyrrole derivatives.
- coumarin derivatives such as coumarin 6, coumarin 7 and coumarin 153
- azole derivatives such as imidazole, thiazole, thiadiazole, carbazole, oxazole, oxadiazole and triazole and metal complexes thereof
- cyanine compounds such as indocyanine green
- fluorescein Xanthene compounds such as eosin and rhodamine and thioxanthene compounds are suitable organic light emitting materials.
- organic light emitting materials such as organometallic complex compounds such as iridium (Ir), ruthenium (Ru), rhodium (Rh), palladium (Pd), platinum (Pt), osmium (Os), and rhenium (Re) are suitable.
- organometallic complex compounds such as iridium (Ir), ruthenium (Ru), rhodium (Rh), palladium (Pd), platinum (Pt), osmium (Os), and rhenium (Re) are suitable.
- the organic light emitting material in the present invention is not limited to these.
- the organic light emitting material may be a fluorescent light emitting material or a phosphorescent light emitting material, but a fluorescent light emitting material is preferable in order to achieve high color purity.
- a compound having a condensed aryl ring and a derivative thereof are preferable because of high thermal stability and light stability.
- a compound having a coordination bond is preferable from the viewpoint of solubility and diversity of molecular structure.
- a compound containing boron such as a boron fluoride complex is also preferable in that the half width is small and highly efficient light emission is possible.
- a pyromethene derivative is preferable because it gives a high fluorescence quantum yield and has good durability. More preferably, it is a compound represented by General formula (1).
- R 1 to R 9 may be the same or different from each other, and may be hydrogen, an alkyl group, a cycloalkyl group, a heterocyclic group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a thiol group, an alkoxy group, an alkylthio group, Aryl ether group, aryl thioether group, aryl group, heteroaryl group, halogen, cyano group, aldehyde group, carbonyl group, carboxyl group, oxycarbonyl group, carbamoyl group, amino group, nitro group, silyl group, siloxanyl group, boryl group , A phosphine oxide group, and a condensed ring and an aliphatic ring formed between adjacent substituents.
- hydrogen may be deuterium.
- a substituted or unsubstituted aryl group having 6 to 40 carbon atoms is an aryl having 6 to 40 carbon atoms in total including the number of carbon atoms contained in the substituent substituted on the aryl group. It is a group. The same applies to other substituents that define the number of carbon atoms.
- the substituents in the case of substitution include alkyl groups, cycloalkyl groups, heterocyclic groups, alkenyl groups, cycloalkenyl groups, alkynyl groups, hydroxyl groups, thiol groups, alkoxy groups, alkylthio groups.
- Aryl ether group, aryl thioether group, aryl group, heteroaryl group, halogen, cyano group, aldehyde group, carbonyl group, carboxyl group, oxycarbonyl group, carbamoyl group, amino group, nitro group, silyl group, siloxanyl group, boryl Group and a phosphine oxide group are preferable, and specific substituents that are preferable in the description of each substituent are preferable. Moreover, these substituents may be further substituted with the above-mentioned substituents.
- substituted means that a hydrogen atom or a deuterium atom is substituted.
- substituted or unsubstituted means that a hydrogen atom or a deuterium atom is substituted.
- substituted or unsubstituted is the same as described above.
- the alkyl group is, for example, a saturated aliphatic hydrocarbon such as methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, tert-butyl group, etc.
- substituents There are no particular limitations on the additional substituent when it is substituted, and examples thereof include an alkyl group, a halogen, an aryl group, a heteroaryl group, and the like, and this point is common to the following description.
- the number of carbon atoms of the alkyl group is not particularly limited, but is preferably 1 or more and 20 or less, more preferably 1 or more and 8 or less, from the viewpoint of availability and cost.
- the cycloalkyl group refers to, for example, a saturated alicyclic hydrocarbon group such as a cyclopropyl group, a cyclohexyl group, a norbornyl group, an adamantyl group, which may or may not have a substituent.
- carbon number of an alkyl group part is not specifically limited, Preferably it is the range of 3 or more and 20 or less.
- the heterocyclic group refers to, for example, an aliphatic ring having an atom other than carbon, such as a pyran ring, piperidine ring, or cyclic amide, in the ring, which may or may not have a substituent. Good. Although carbon number of a heterocyclic group is not specifically limited, Preferably it is the range of 2-20.
- alkenyl group refers to an unsaturated aliphatic hydrocarbon group containing a double bond such as a vinyl group, an allyl group, or a butadienyl group, which may or may not have a substituent.
- carbon number of an alkenyl group is not specifically limited, Preferably it is the range of 2-20.
- the cycloalkenyl group refers to an unsaturated alicyclic hydrocarbon group containing a double bond such as a cyclopentenyl group, a cyclopentadienyl group, a cyclohexenyl group, and the like, which may have a substituent. It may not have.
- the alkynyl group refers to, for example, an unsaturated aliphatic hydrocarbon group containing a triple bond such as an ethynyl group, which may or may not have a substituent.
- carbon number of an alkynyl group is not specifically limited, Preferably it is the range of 2-20.
- An alkoxy group refers to a functional group to which an aliphatic hydrocarbon group is bonded through an ether bond such as a methoxy group, an ethoxy group, or a propoxy group, and the aliphatic hydrocarbon group has a substituent. May not be included.
- the number of carbon atoms of the alkoxy group is not particularly limited, but is preferably in the range of 1 or more and 20 or less.
- the alkylthio group is a group in which an oxygen atom of an ether bond of an alkoxy group is substituted with a sulfur atom.
- the hydrocarbon group of the alkylthio group may or may not have a substituent.
- carbon number of an alkylthio group is not specifically limited, Preferably it is the range of 1 or more and 20 or less.
- An aryl ether group refers to a functional group to which an aromatic hydrocarbon group is bonded via an ether bond, such as a phenoxy group, and the aromatic hydrocarbon group may or may not have a substituent. Also good.
- the number of carbon atoms of the aryl ether group is not particularly limited, but is preferably in the range of 6 or more and 40 or less.
- the aryl thioether group is a group in which an oxygen atom of an ether bond of an aryl ether group is substituted with a sulfur atom.
- the aromatic hydrocarbon group in the aryl thioether group may or may not have a substituent.
- the number of carbon atoms of the aryl thioether group is not particularly limited, but is preferably in the range of 6 or more and 40 or less.
- the aryl group is, for example, phenyl group, biphenyl group, terphenyl group, naphthyl group, fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenanthryl group, anthracenyl group, benzophenanthryl group, benzoanthracene group.
- An aromatic hydrocarbon group such as a nyl group, a chrycenyl group, a pyrenyl group, a fluoranthenyl group, a triphenylenyl group, a benzofluoranthenyl group, a dibenzoanthracenyl group, a perylenyl group, or a helicenyl group.
- a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a phenanthryl group, an anthracenyl group, a pyrenyl group, a fluoranthenyl group, and a triphenylenyl group are preferable.
- the aryl group may or may not have a substituent. Although carbon number of an aryl group is not specifically limited, Preferably it is 6 or more and 40 or less, More preferably, it is the range of 6 or more and 30 or less.
- the aryl group is preferably a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a phenanthryl group, or an anthracenyl group.
- Group, terphenyl group, and naphthyl group are more preferable. More preferred are a phenyl group, a biphenyl group, and a terphenyl group, and a phenyl group is particularly preferred.
- the aryl group is preferably a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a phenanthryl group, or an anthracenyl group.
- a phenyl group and a naphthyl group are more preferable. Particularly preferred is a phenyl group.
- the heteroaryl group is, for example, pyridyl group, furanyl group, thiophenyl group, quinolinyl group, isoquinolinyl group, pyrazinyl group, pyrimidyl group, pyridazinyl group, triazinyl group, naphthyridinyl group, cinnolinyl group, phthalazinyl group, quinoxalinyl group, quinazolinyl group, Benzofuranyl group, benzothiophenyl group, indolyl group, dibenzofuranyl group, dibenzothiophenyl group, carbazolyl group, benzocarbazolyl group, carbolinyl group, indolocarbazolyl group, benzofurocarbazolyl group, benzothienocarba Zolyl group, dihydroindenocarbazolyl group, benzoquinolinyl group, acridinyl group, dibenzoacridin
- the naphthyridinyl group is any of 1,5-naphthyridinyl group, 1,6-naphthyridinyl group, 1,7-naphthyridinyl group, 1,8-naphthyridinyl group, 2,6-naphthyridinyl group, and 2,7-naphthyridinyl group.
- the heteroaryl group may or may not have a substituent. Although carbon number of a heteroaryl group is not specifically limited, Preferably it is 2 or more and 40 or less, More preferably, it is the range of 2 or more and 30 or less.
- heteroaryl group examples include pyridyl group, furanyl group, thiophenyl group, quinolinyl group, pyrimidyl group, triazinyl group, benzofuranyl group, benzothiophenyl group, Indolyl group, dibenzofuranyl group, dibenzothiophenyl group, carbazolyl group, benzimidazolyl group, imidazopyridyl group, benzoxazolyl group, benzothiazolyl group, phenanthrolinyl group are preferred, pyridyl group, furanyl group, thiophenyl group, quinolinyl Groups are more preferred. Particularly preferred is a pyridyl group.
- the heteroaryl group includes a pyridyl group, furanyl group, thiophenyl group, quinolinyl group, pyrimidyl group, triazinyl group, benzofuranyl group, benzothiophenyl group, indolyl group, Dibenzofuranyl group, dibenzothiophenyl group, carbazolyl group, benzoimidazolyl group, imidazopyridyl group, benzoxazolyl group, benzothiazolyl group, phenanthrolinyl group are preferable, pyridyl group, furanyl group, thiophenyl group, quinolinyl group are more preferable. Particularly preferred is a pyridyl group.
- Halogen refers to an atom selected from fluorine, chlorine, bromine and iodine.
- the carbonyl group, carboxyl group, oxycarbonyl group, and carbamoyl group may or may not have a substituent.
- substituents include an alkyl group, a cycloalkyl group, an aryl group, and a heteroaryl group, and these substituents may be further substituted.
- An amino group is a substituted or unsubstituted amino group.
- the amino group may or may not have a substituent.
- substituents in the case of substitution include an aryl group, a heteroaryl group, a linear alkyl group, and a branched alkyl group. .
- aryl group and heteroaryl group a phenyl group, a naphthyl group, a pyridyl group, and a quinolinyl group are preferable. These substituents may be further substituted.
- carbon number is not specifically limited, Preferably it is 2 or more and 50 or less, More preferably, it is 6 or more and 40 or less, Especially preferably, it is the range of 6 or more and 30 or less.
- silyl groups include trimethylsilyl groups, triethylsilyl groups, tert-butyldimethylsilyl groups, propyldimethylsilyl groups, vinyldimethylsilyl groups, and other alkylsilyl groups, phenyldimethylsilyl groups, tert-butyldiphenylsilyl groups, An arylsilyl group such as a phenylsilyl group or a trinaphthylsilyl group is shown. Substituents on silicon may be further substituted. Although carbon number of a silyl group is not specifically limited, Preferably it is the range of 1 or more and 30 or less.
- the siloxanyl group refers to a silicon compound group via an ether bond such as a trimethylsiloxanyl group. Substituents on silicon may be further substituted.
- the boryl group is a substituted or unsubstituted boryl group.
- the boryl group may or may not have a substituent. Examples of the substituent in the case of substitution include an aryl group, a heteroaryl group, a linear alkyl group, a branched alkyl group, and an aryl ether group. , An alkoxy group and a hydroxyl group, among which an aryl group and an aryl ether group are preferable.
- the phosphine oxide group is a group represented by —P ( ⁇ O) R 10 R 11 .
- R 10 R 11 is selected from the same group as R 1 to R 9 .
- the condensed ring formed between adjacent substituents means that any adjacent two substituents (for example, R 1 and R 2 in the general formula (1)) are bonded to each other to form a conjugated or non-conjugated cyclic skeleton. It means forming.
- a constituent element of such a condensed ring in addition to carbon, an element selected from nitrogen, oxygen, sulfur, phosphorus and silicon may be included. Further, the condensed ring may be further condensed with another ring.
- the compound represented by the general formula (1) exhibits a high fluorescence quantum yield and has a small peak half-value width of the emission spectrum, it is possible to achieve both efficient color conversion and high color purity. Furthermore, the compound represented by the general formula (1) introduces an appropriate substituent at an appropriate position, so that various properties such as light emission efficiency, color purity, thermal stability, light stability and dispersibility can be obtained. And physical properties can be adjusted. For example, as compared to the case where R 1 , R 3 , R 4 and R 6 are all hydrogen, at least one of R 1 , R 3 , R 4 and R 6 is a substituted or unsubstituted alkyl group or substituted or unsubstituted aryl. The group, a substituted or unsubstituted heteroaryl group, shows better thermal stability and light stability.
- the alkyl group includes a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, Alkyl groups having 1 to 6 carbon atoms such as sec-butyl group, tert-butyl group, pentyl group and hexyl group are preferred.
- the alkyl group is preferably a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, or a tert-butyl group from the viewpoint of excellent thermal stability. Further, from the viewpoint of preventing concentration quenching and improving the emission quantum yield, this alkyl group is more preferably a sterically bulky tert-butyl group. Further, from the viewpoint of ease of synthesis and availability of raw materials, a methyl group is also preferably used as this alkyl group.
- the aryl group is preferably a phenyl group, a biphenyl group, a terphenyl group, or a naphthyl group, more preferably A phenyl group and a biphenyl group. Particularly preferred is a phenyl group.
- the heteroaryl group is preferably a pyridyl group, a quinolinyl group, or a thiophenyl group, and more preferably a pyridyl group , A quinolinyl group. Particularly preferred is a pyridyl group.
- R 1 , R 3 , R 4 and R 6 may all be the same or different, and a substituted or unsubstituted alkyl group is preferable because of good solubility in a binder resin and a solvent.
- the alkyl group is preferably a methyl group from the viewpoints of ease of synthesis and availability of raw materials.
- R 1 , R 3 , R 4 and R 6 can all be the same or different, and when they are substituted or unsubstituted aryl groups or substituted or unsubstituted heteroaryl groups, better thermal stability and This is preferable because it shows light stability.
- R 1 , R 3 , R 4 and R 6 may all be the same or different, and are more preferably substituted or unsubstituted aryl groups.
- R 1 , R 3 , R 4 and R 6 may all be the same or different, and in the case of a substituted or unsubstituted aryl group, for example, R 1 ⁇ R 4 , R 3 ⁇ R 6 , R It is preferable to introduce a plurality of types of substituents such as 1 ⁇ R 3 or R 4 ⁇ R 6 .
- “ ⁇ ” indicates a group having a different structure.
- R 1 ⁇ R 4 indicates that R 1 and R 4 are groups having different structures.
- R 1 ⁇ R 3 or R 4 ⁇ R 6 is preferable from the viewpoint of improving the luminous efficiency and color purity in a balanced manner.
- one or more aryl groups that affect the color purity are introduced into the pyrrole rings on both sides, and the aryl that affects the luminous efficiency at other positions. Since groups can be introduced, both of these properties can be maximized.
- an aryl group substituted with an electron donating group is preferable.
- the electron donating group include an alkyl group and an alkoxy group.
- an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms is preferable, and a methyl group, an ethyl group, a tert-butyl group, or a methoxy group is more preferable.
- a tert-butyl group and a methoxy group are particularly preferable.
- substitution position of the substituent is not particularly limited, it is necessary to suppress the twisting of the bond in order to increase the light stability of the compound represented by the general formula (1). It is preferable to bond to the meta position or the para position.
- the aryl group mainly affecting the luminous efficiency an aryl group having a bulky substituent such as a tert-butyl group, an adamantyl group, or a methoxy group is preferable.
- R 1 , R 3 , R 4 and R 6 may be the same or different, and when they are substituted or unsubstituted aryl groups, R 1 , R 3 , R 4 and R 6 are the same or different. It may be a substituted or unsubstituted phenyl group. At this time, it is more preferable that R 1 , R 3 , R 4 and R 6 are each selected from the following Ar-1 to Ar-6. In this case, preferred combinations of R 1 , R 3 , R 4 and R 6 include combinations shown in Table 1-1 to Table 1-11, but are not limited thereto.
- R 2 and R 5 are preferably hydrogen, an alkyl group, a carbonyl group, an oxycarbonyl group, or an aryl group, but are preferably hydrogen or an alkyl group from the viewpoint of thermal stability.
- R 2 and R 5 are more preferably hydrogen from the viewpoint of easily obtaining a narrow half-value width in the emission spectrum.
- R 8 and R 9 are preferably an alkyl group, an aryl group, a heteroaryl group, fluorine, a fluorine-containing alkyl group, a fluorine-containing heteroaryl group or a fluorine-containing aryl group.
- R 8 and R 9 are more preferably fluorine or a fluorine-containing aryl group because they are stable against excitation light and a higher fluorescence quantum yield is obtained.
- R 8 and R 9 are more preferably fluorine in view of ease of synthesis.
- the fluorine-containing aryl group is an aryl group containing fluorine, and examples thereof include a fluorophenyl group, a trifluoromethylphenyl group, and a pentafluorophenyl group.
- the fluorine-containing heteroaryl group is a heteroaryl group containing fluorine, and examples thereof include a fluoropyridyl group, a trifluoromethylpyridyl group, and a trifluoropyridyl group.
- the fluorine-containing alkyl group is an alkyl group containing fluorine, and examples thereof include a trifluoromethyl group and a pentafluoroethyl group.
- X is preferably C—R 7 from the viewpoint of light stability.
- the substituent R 7 greatly affects the durability of the compound represented by the general formula (1), that is, the decrease in the emission intensity of this compound over time.
- R 7 is hydrogen
- the reactivity of this part is high, so that this part easily reacts with moisture or oxygen in the air. This causes decomposition of the compound represented by the general formula (1).
- R 7 is, for example, a substituent freedom is large motion of the molecular chain such as an alkyl group is certainly reactive to decreases but the compound with each other over time aggregate in the composition, results In particular, the emission intensity is reduced due to concentration quenching.
- R 7 is preferably a group that is rigid and has a low degree of freedom of movement and is unlikely to cause aggregation.
- R 7 is a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group. It is preferable that it is either.
- X is C—R 7 and R 7 is preferably a substituted or unsubstituted aryl group from the viewpoint of giving a higher fluorescence quantum yield, being harder to thermally decompose, and from the viewpoint of light stability.
- R 7 is preferably a substituted or unsubstituted aryl group from the viewpoint of giving a higher fluorescence quantum yield, being harder to thermally decompose, and from the viewpoint of light stability.
- the aryl group a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a phenanthryl group, and an anthracenyl group are preferable from the viewpoint of not impairing the emission wavelength.
- R 7 is preferably a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, or a substituted or unsubstituted naphthyl group.
- a phenyl group, a substituted or unsubstituted biphenyl group, and a substituted or unsubstituted terphenyl group are more preferable. Particularly preferred is a substituted or unsubstituted phenyl group.
- R 7 is preferably a moderately bulky substituent.
- R 7 has a certain amount of bulkiness, aggregation of molecules can be prevented. As a result, the luminous efficiency and durability of the compound are further improved.
- a more preferred example of such a bulky substituent includes the structure of R 7 represented by the following general formula (2).
- r is hydrogen, alkyl group, cycloalkyl group, heterocyclic group, alkenyl group, cycloalkenyl group, alkynyl group, hydroxyl group, thiol group, alkoxy group, alkylthio group, aryl ether group, aryl thioether Group, aryl group, heteroaryl group, halogen, cyano group, aldehyde group, carbonyl group, carboxyl group, oxycarbonyl group, carbamoyl group, amino group, nitro group, silyl group, siloxanyl group, boryl group, phosphine oxide group Selected from the group.
- k is an integer of 1 to 3. When k is 2 or more, r may be the same or different.
- r is preferably a substituted or unsubstituted aryl group.
- aryl groups a phenyl group and a naphthyl group are particularly preferable examples.
- k in the general formula (2) is preferably 1 or 2, and k is more preferably 2 from the viewpoint of further preventing aggregation of molecules.
- k is 2 or more, it is preferable that at least one of r is substituted with an alkyl group.
- the alkyl group in this case, a methyl group, an ethyl group, and a tert-butyl group are particularly preferable from the viewpoint of thermal stability.
- r is preferably a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group or a halogen.
- a methyl group, an ethyl group, a tert-butyl group, and a methoxy group are more preferable.
- a tert-butyl group and a methoxy group are particularly preferable.
- R 1 to R 7 is an electron withdrawing group.
- R 1 to R 6 is an electron withdrawing group
- R 7 is an electron withdrawing group
- at least one of R 1 to R 6 is an electron. It is preferably an attracting group and R 7 is an electron withdrawing group.
- the electron-withdrawing group is also called an electron-accepting group, and is an atomic group that attracts electrons from a substituted atomic group by an induced effect or a resonance effect in organic electron theory.
- Examples of the electron-withdrawing group include those that take a positive value as the Hammett's rule substituent constant ( ⁇ p (para)).
- the Hammett's rule substituent constant ( ⁇ p (para)) can be cited from the Chemical Handbook, Basic Revision 5 (II-380).
- a phenyl group also has the example which takes the above positive values, in this invention, a phenyl group is not contained in an electron withdrawing group.
- electron withdrawing groups include, for example, -F ( ⁇ p: +0.20), -Cl ( ⁇ p: +0.28), -Br ( ⁇ p: +0.30), -I ( ⁇ p: +0.30),- CO 2 R 12 ( ⁇ p: when R 12 is an ethyl group +0.45), —CONH 2 ( ⁇ p: +0.38), —COR 12 ( ⁇ p: when R 12 is a methyl group +0.49), —CF 3 ( ⁇ p: +0.51), —SO 2 R 12 (+0.69 when ⁇ p: R 12 is a methyl group), —NO 2 ( ⁇ p: +0.81), and the like.
- R 12 each independently represents a hydrogen atom, a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms, substituted or unsubstituted
- a substituted alkyl group having 1 to 30 carbon atoms and a substituted or unsubstituted cycloalkyl group having 1 to 30 carbon atoms are represented. Specific examples of these groups include the same examples as described above.
- Preferred electron withdrawing groups include fluorine, fluorine-containing aryl groups, fluorine-containing heteroaryl groups, fluorine-containing alkyl groups, substituted or unsubstituted acyl groups, substituted or unsubstituted ester groups, substituted or unsubstituted amide groups, and substituted groups. Or an unsubstituted sulfonyl group or a cyano group is mentioned. This is because they are difficult to decompose chemically.
- More preferred electron withdrawing groups include fluorine-containing alkyl groups, substituted or unsubstituted acyl groups, substituted or unsubstituted ester groups, and cyano groups. This is because these lead to effects of preventing concentration quenching and improving the emission quantum yield. Particularly preferred electron withdrawing groups are substituted or unsubstituted ester groups.
- R 1 , R 3 , R 4 and R 6 may all be the same or different and each may be a substituted or unsubstituted alkyl group.
- X is C—R 7 and R 7 is a group represented by the general formula (2).
- R 7 is particularly preferably a group represented by the general formula (2) in which r is included as a substituted or unsubstituted phenyl group.
- R 1 , R 3 , R 4 and R 6 may all be the same or different, and the above-mentioned Ar— And a case where X is C—R 7 and R 7 is a group represented by the general formula (2).
- R 7 is more preferably a group represented by the general formula (2) in which r is a tert-butyl group or methoxy group, and represented by the general formula (2) in which r is a methoxy group. It is particularly preferred that
- the compound represented by the general formula (1) can be produced, for example, by the method described in JP-T-8-509471 and JP-A-2000-208262. That is, the target pyromethene metal complex is obtained by reacting the pyromethene compound and the metal salt in the presence of a base.
- a method of generating a carbon-carbon bond by using a coupling reaction between a halogenated derivative and a boronic acid or a boronic acid esterified derivative can be mentioned.
- the present invention is not limited to this.
- introducing an amino group or a carbazolyl group for example, there is a method of generating a carbon-nitrogen bond by using a coupling reaction between a halogenated derivative and an amine or a carbazole derivative under a metal catalyst such as palladium.
- the present invention is not limited to this.
- the layer can contain other compounds as required in addition to the compound represented by the general formula (1).
- an assist dopant such as rubrene may be contained in order to further increase the energy transfer efficiency from the excitation light to the compound represented by the general formula (1).
- a desired organic light emitting material such as a coumarin dye, a perylene dye, a phthalocyanine dye, a stilbene dye, a cyanine is used.
- dyes such as dyes, polyphenylene dyes, rhodamine dyes, pyridine dyes, pyromethene dyes, porphyrin dyes, oxazine dyes, and pyrazine dyes.
- dyes such as dyes, polyphenylene dyes, rhodamine dyes, pyridine dyes, pyromethene dyes, porphyrin dyes, oxazine dyes, and pyrazine dyes.
- known light-emitting materials such as inorganic phosphors, fluorescent pigments, fluorescent dyes, and quantum dots can be added in combination.
- the layer (A) is a light emitting material that emits light observed in a region having a peak wavelength of 500 nm or more and 580 nm or less by using excitation light having a wavelength of 430 nm or more and 500 nm or less (hereinafter referred to as “light emitting material (a)”. ").
- light emitting material (a) light emitting material
- green light emission light emission observed in a region where the peak wavelength is 500 nm or more and 580 nm or less.
- the higher the excitation light energy the easier the material is decomposed.
- the excitation light having a wavelength in the range of 430 nm or more and 500 nm or less is a relatively small excitation energy, and therefore the (A) luminescent material (a ), Green light emission with good color purity can be obtained.
- the layer (A) has a light emitting material (a) that emits light having a peak wavelength of 500 nm or more and 580 nm or less by using excitation light having a wavelength in the range of 430 nm or more and 500 nm or less, and a wavelength of 430 nm or more and 500 nm or less.
- a light emitting material exhibiting light emission observed in a region having a peak wavelength of not less than 580 nm and not more than 750 nm by being excited by either or both of excitation light in the range and light emission from the light emitting material (a) (hereinafter referred to as “light emitting material”). b) ").
- light emission observed in a region having a peak wavelength of 580 nm or more and 750 nm or less is referred to as “red light emission”.
- a part of the excitation light having a wavelength in the range of 430 nm or more and 500 nm or less is partially transmitted through the color conversion film according to the embodiment of the present invention. Therefore, when a blue LED having a sharp emission peak is used, Each red color has a sharp emission spectrum, and white light with good color purity can be obtained. As a result, particularly in displays, a larger color gamut with more vivid colors can be created efficiently. Also, in lighting applications, the light emission characteristics of the green and red regions are improved, compared with white LEDs that are currently combined with blue LEDs and yellow phosphors. It becomes.
- Examples of the luminescent material (a) include coumarin derivatives such as coumarin 6, coumarin 7, coumarin 153, cyanine derivatives such as indocyanine green, fluorescein derivatives such as fluorescein, fluorescein isothiocyanate, carboxyfluorescein diacetate, and phthalocyanine derivatives such as phthalocyanine green.
- coumarin derivatives such as coumarin 6, coumarin 7, coumarin 153
- cyanine derivatives such as indocyanine green
- fluorescein derivatives such as fluorescein, fluorescein isothiocyanate, carboxyfluorescein diacetate
- phthalocyanine derivatives such as phthalocyanine green.
- Perylene derivatives such as diisobutyl-4,10-dicyanoperylene-3,9-dicarboxylate, pyromethene derivatives, stilbene derivatives, oxazine derivatives, naphthalimide derivatives, pyrazine derivatives, benzimidazole derivatives, benzoxazole derivatives, benzothiazoles Derivatives, imidazopyridine derivatives, azole derivatives, compounds having condensed aryl rings such as anthracene, derivatives thereof, aromatic amine derivatives, Metal complex compounds, and the like as preferred.
- the light emitting material (a) is not particularly limited thereto.
- pyromethene derivatives are particularly suitable compounds because they give high fluorescence quantum yield and good durability.
- the compound represented by the general formula (1) emits light with high color purity. It is preferable from showing.
- Examples of the luminescent material (b) include cyanine derivatives such as 4-dicyanomethylene-2-methyl-6- (p-dimethylaminostyryl) -4H-pyran, and rhodamines such as rhodamine B, rhodamine 6G, rhodamine 101, and sulforhodamine 101.
- cyanine derivatives such as 4-dicyanomethylene-2-methyl-6- (p-dimethylaminostyryl) -4H-pyran
- rhodamines such as rhodamine B, rhodamine 6G, rhodamine 101, and sulforhodamine 101.
- pyridine derivatives such as 1-ethyl-2- (4- (p-dimethylaminophenyl) -1,3-butadienyl) -pyridinium-perchlorate, N, N′-bis (2,6-diisopropylphenyl)- Perylene derivatives such as 1,6,7,12-tetraphenoxyperylene-3,4: 9,10-bisdicarbimide, porphyrin derivatives, pyromethene derivatives, oxazine derivatives, pyrazine derivatives, naphthacene and dibenzodiindenoperylene Compounds having a condensed aryl ring, derivatives thereof, organometallic complexes Compounds and the like as preferred.
- the light emitting material (b) is not particularly limited thereto.
- pyromethene derivatives are particularly suitable compounds because they give high fluorescence quantum yield and good durability.
- the compound represented by the general formula (1) emits light with high color purity. It is preferable from showing.
- the half-value widths of the emission spectra of blue, green and red are small. In particular, it is effective to improve the color reproducibility that the half-value widths of the emission spectra of green light and red light are small.
- the half value width of light emission of the organic light emitting material in the layer (A) is preferably 120 nm or less, and more preferably 100 nm or less. More preferably, it is 80 nm or less, and it is especially preferable that it is 60 nm or less.
- a half value width of a luminescent material (a) it is more preferable that it is 40 nm or less, and it is especially preferable that it is 30 nm or less.
- the shape of the emission spectrum of each color light-emitting material is not particularly limited, but it is preferably a single peak because excitation energy can be used efficiently and color purity is increased.
- the single peak indicates a state where there is no peak having an intensity of 5% or more of the intensity with respect to the strongest peak in the emission spectrum.
- the content of the organic light-emitting material in the layer (A) depends on the molar absorption coefficient of the compound, the fluorescence quantum yield and the absorption intensity at the excitation wavelength, and the thickness and transmittance of the film, but is usually 100 parts by weight of the binder resin. 1.0 ⁇ 10 ⁇ 4 to 30 parts by weight, more preferably 1.0 ⁇ 10 ⁇ 3 to 10 parts by weight, and more preferably 1.0 ⁇ 10 ⁇ 2 to The amount is particularly preferably 5 parts by weight.
- the layer (A) contains both the light emitting material (a) that emits green light and the light emitting material (b) that emits red light
- w a and w b are weight percent with respect to the weight of the binder resin.
- the binder resin in the (A) layer of the present invention is a material that is mixed with an organic light emitting material or the like to form a continuous phase, and may be any material that is excellent in molding processability, transparency, heat resistance, and the like.
- binder resin examples include, for example, a photocurable resist material having a reactive vinyl group such as acrylic acid, methacrylic acid, polyvinyl cinnamate, and ring rubber, epoxy resin, silicone resin (silicone rubber, silicone Organopolysiloxane cured products (cross-linked products) such as gel), urea resin, fluororesin, polycarbonate resin, acrylic resin, urethane resin, melamine resin, polyvinyl resin, polyamide resin, phenol resin, polyvinyl alcohol resin, polyvinyl butyral resin , Known resins such as cellulose resins, aliphatic ester resins, aromatic ester resins, aliphatic polyolefin resins, and aromatic polyolefin resins. Moreover, you may use such copolymer resin as binder resin. By appropriately designing these resins, a binder resin useful for the color conversion film according to the embodiment of the present invention can be obtained.
- a photocurable resist material having a reactive vinyl group such as
- an epoxy resin, a silicone resin, an acrylic resin, a polyester resin, or a mixture thereof can be suitably used from the viewpoints of transparency and heat resistance.
- a thermosetting resin or a photocurable resin is also preferably used.
- a silicone resin is particularly preferable.
- addition reaction curable silicone compositions are preferred as binder resins. The addition reaction curable silicone composition is heated and cured at room temperature or a temperature of 50 ° C. to 200 ° C., and is excellent in transparency, heat resistance, and adhesiveness.
- the addition reaction curable silicone composition is formed, for example, by a hydrosilylation reaction between a compound containing an alkenyl group bonded to a silicon atom and a compound having a hydrogen atom bonded to a silicon atom.
- Such materials contain alkenyl groups bonded to silicon atoms such as vinyltrimethoxysilane, vinyltriethoxysilane, allyltrimethoxysilane, propenyltrimethoxysilane, norbornenyltrimethoxysilane, octenyltrimethoxysilane, etc.
- methylhydrogenpolysiloxane dimethylpolysiloxane-CO-methylhydrogenpolysiloxane, ethylhydrogenpolysiloxane, methylhydrogenpolysiloxane-CO-methylphenylpolysiloxane, etc.
- examples thereof include those formed by hydrosilylation reaction with a compound having the same.
- other publicly known ones such as those described in JP 2010-159411 A can be used.
- silicone sealing material for general LED applications as a commercially available product.
- Specific examples include OE-6630A / B and OE-6336A / B manufactured by Toray Dow Corning, and SCR-1012A / B and SCR-1016A / B manufactured by Shin-Etsu Chemical Co., Ltd.
- a hydrosilylation reaction retarder such as acetylene alcohol is blended in order to suppress curing at room temperature and lengthen the pot life. It is preferable.
- fine particles such as fumed silica, glass powder, quartz powder, etc., inorganic fillers and pigments such as titanium oxide, zirconia oxide, barium titanate, zinc oxide, You may mix
- blend adhesiveness imparting agents such as a flame retardant, a heat resistant agent, antioxidant, a dispersing agent, a solvent, a silane coupling agent, and a titanium coupling agent.
- a low molecular weight polydimethylsiloxane component silicone oil, or the like to the composition for preparing the layer (A).
- Such components are preferably added in an amount of 100 to 2,000 ppm, more preferably 500 to 1,000 ppm, based on the entire composition.
- the layer (A) includes an organic light emitting material and a binder resin, an antioxidant, a processing and heat stabilizer, a light resistance stabilizer such as an ultraviolet absorber, a dispersant and a leveling agent for stabilizing the coating film, Cross-linking agents such as plasticizers and epoxy compounds, curing agents such as amines, acid anhydrides and imidazoles, adhesion aids such as silane coupling agents as sheet surface modifiers, silica particles and silicone as color conversion material sedimentation inhibitors You may contain inorganic particles, such as microparticles
- these additives preferably have a small extinction coefficient in the visible range so as not to hinder light from the light source and light emission of the light emitting material.
- the molar extinction coefficient ⁇ is preferably 1000 or less, and more preferably 500 or less over the entire wavelength range of wavelengths from 400 nm to 800 nm. More preferably, it is 200 or less, and it is especially preferable that it is 100 or less.
- antioxidants examples include phenolic antioxidants such as 2,6-di-tert-butyl-p-cresol and 2,6-di-tert-butyl-4-ethylphenol. Is not to be done. These antioxidants may be used alone or in combination.
- processing and heat stabilizer examples include phosphorus stabilizers such as tributyl phosphite, tricyclohexyl phosphite, triethylphosphine, and diphenylbutylphosphine, but are not particularly limited. These stabilizers may be used alone or in combination.
- Examples of the light resistance stabilizer include 2- (5-methyl-2-hydroxyphenyl) benzotriazole, 2- [2-hydroxy-3,5-bis ( ⁇ , ⁇ -dimethylbenzyl) phenyl] -2H- Although benzotriazoles, such as benzotriazole, can be mentioned, it is not specifically limited. These light resistance stabilizers may be used alone or in combination.
- a compound having a role as a singlet oxygen quencher can be suitably used as the light resistance stabilizer.
- a singlet oxygen quencher is a material that traps and inactivates singlet oxygen formed by activation of oxygen molecules by the energy of light. The presence of the singlet oxygen quencher in the composition can prevent the light emitting material from being deteriorated by singlet oxygen.
- the compound represented by the general formula (1) is single-layered compared to a compound having a condensed aryl ring such as perylene or a derivative thereof.
- the reactivity with singlet oxygen is high, and the influence on durability by singlet oxygen is large. Therefore, the durability of the compound represented by the general formula (1) excellent in quantum yield and color purity is improved by quickly inactivating the generated singlet oxygen with a singlet oxygen quencher. Can do.
- Examples of the compound having a role as a singlet oxygen quencher include specific tertiary amines, catechol derivatives and nickel compounds, but are not particularly limited. These light resistance stabilizers may be used alone or in combination.
- the tertiary amine refers to a compound having a structure in which all NH bonds of ammonia are replaced with NC bonds.
- substituent on the nitrogen atom include alkyl group, cycloalkyl group, heterocyclic group, alkenyl group, cycloalkenyl group, alkynyl group, aryl group, heteroaryl group, aldehyde group, carbonyl group, carboxyl group, oxycarbonyl group, It is selected from a condensed ring and an aliphatic ring formed between a carbamoyl group and an adjacent substituent. Moreover, these substituents may be further substituted with the above-mentioned substituents.
- Examples of the substituent on the nitrogen atom of the tertiary amine include a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, and a substituted or unsubstituted heteroaryl group. From the viewpoint of stability, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, or a substituted or unsubstituted aryl group is more preferable.
- the aryl group is preferably a phenyl group or a naphthyl group, more preferably a phenyl group, since it does not inhibit light from the light source or light emission of the light emitting material.
- the number of aryl groups is preferably two or less, and one or less. It is more preferable. It is preferable that at least one of the three substituents on the nitrogen atom is a substituted or unsubstituted alkyl group, since singlet oxygen can be trapped more efficiently. Among these, it is preferable that two or more of the three substituents are substituted or unsubstituted alkyl groups.
- Preferred tertiary amines include triethylamine, 1,4-diazabicyclo [2.2.2] octane, tri-n-butylamine, N, N-diethylaniline, 2,2,6,6-tetramethylpiperidine, sebacic acid Examples thereof include bis (1,2,2,6,6-pentamethyl-4-piperidyl), 1,2,2,6,6-pentamethyl-4-piperidyl methacrylate, and the like. Absent.
- the catechol derivative refers to a compound having two or more hydroxyl groups on the benzene ring, including isomers such as resorcinol and hydroquinone. These compounds can trap singlet oxygen more efficiently than phenol derivatives having one hydroxyl group on the benzene ring.
- substituents on the benzene ring in addition to hydroxyl groups, hydrogen, alkyl groups, cycloalkyl groups, heterocyclic groups, alkenyl groups, cycloalkenyl groups, alkynyl groups, thiol groups, alkoxy groups, alkylthio groups, aryl ether groups, Arylthioether group, aryl group, heteroaryl group, halogen, cyano group, aldehyde group, carbonyl group, carboxyl group, oxycarbonyl group, carbamoyl group, amino group, nitro group, silyl group, siloxanyl group, boryl group, phosphine oxide group And a condensed ring formed between adjacent substituents and an aliphatic ring. Moreover, these substituents may be further substituted with the above-mentioned substituents.
- a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, and a halogen are preferable from the viewpoint of light stability, and substituted or unsubstituted.
- a substituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, and a halogen are more preferable.
- a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, and a halogen are more preferable because the discoloration after reaction with the singlet oxygen quencher is small.
- Particularly preferred is a substituted or unsubstituted alkyl group.
- the position of the hydroxyl group on the benzene ring it is preferable that at least two hydroxyl groups are adjacent to each other. This is because photooxidation is less likely than resorcinol (1,3-substituted) and hydroquinone (1,4-substituted). Moreover, since the light absorption in the visible region is small even after being oxidized, discoloration of the composition can be prevented.
- Preferred catechol derivatives include 4-tert-butylbenzene-1,2-diol, 3,5-di-tert-butylbenzene-1,2-diol, but are not particularly limited thereto. .
- Nickel compounds are compounds containing nickel, and include inorganic salts such as nickel chloride, complexes such as bisacetylacetonato nickel, and organic acid salts such as nickel carbamate, but are not limited to these. is not.
- the organic acid refers to an organic compound having a carboxyl group, a sulfonyl group, a phenolic hydroxyl group, and a thiol group. Of these, complexes and organic acid salts are preferred from the viewpoint of being uniformly dispersed in the composition.
- nickel salts of organic acids at least one of nickel salts of organic acids, acetylacetonate nickel complexes, and thiobisphenolate nickel complexes is preferable.
- nickel salts of organic acids are preferred.
- a sulfonic acid nickel salt is preferable.
- a nickel salt of arylsulfonic acid is more preferable, and from the viewpoint of solubility in a wide variety of solvents, a nickel salt of alkylsulfonic acid is preferable.
- aryl group of the aryl sulfonic acid a substituted or unsubstituted phenyl group is preferable, and a phenyl group substituted with an alkyl group is more preferable from the viewpoint of solubility in a solvent and dispersibility.
- acetylacetonate nickel complexes and thiobisphenolate nickel complexes are preferred.
- the ligands on nickel in these complexes are alkyl groups, cycloalkyl groups, heterocyclic groups, alkenyl groups, cycloalkenyl groups, alkynyl groups, thiol groups, alkoxy groups, alkylthio groups, aryl ether groups, aryl thioether groups, Substituents such as aryl group, heteroaryl group, halogen, cyano group, aldehyde group, carbonyl group, carboxyl group, oxycarbonyl group, carbamoyl group, amino group, nitro group, silyl group, siloxanyl group, boryl group, phosphine oxide group These substituents may be further substituted with the above-mentioned substituents.
- a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, and a halogen are preferable from the viewpoint of light stability, and substituted or unsubstituted.
- a substituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, and a halogen are more preferable.
- a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, and a halogen are more preferable because the discoloration after reaction with the singlet oxygen quencher is small.
- Particularly preferred is a substituted or unsubstituted alkyl group.
- Nickel compounds having a molar extinction coefficient ⁇ of 100 or less over the entire wavelength range of wavelengths from 400 nm to 800 nm include p-toluylsulfonic acid nickel salts, acetylacetone nickel (II) complexes, hexafluoroacetylacetone nickel (II) complexes, 2,2′-thiobisphenolate-n-butylamine nickel (II) complex, [2,2′-thiobis (4-tert-octylphenolate)]-2-ethylhexylamine nickel (II) complex, etc.
- the present invention is not limited to this, and any nickel compound having a molar extinction coefficient ⁇ of 100 or less in the entire wavelength region of wavelengths of 400 nm or more and 800 nm or less among the above-described nickel compounds can be suitably used. These compounds may be used independently and may use multiple types together.
- the content of these additives in the layer (A) depends on the molar absorption coefficient ⁇ of the compound, the fluorescence quantum yield and the absorption intensity at the excitation wavelength, and the thickness and transmittance of the film to be produced. It is preferably 1.0 ⁇ 10 ⁇ 3 parts by weight or more and 30 parts by weight or less, more preferably 1.0 ⁇ 10 ⁇ 2 parts by weight or more and 15 parts by weight or less with respect to 100 parts by weight of the resin. More preferably, it is 0.0 ⁇ 10 ⁇ 2 part by weight or more and 10 parts by weight or less, and particularly preferably 1.0 ⁇ 10 ⁇ 1 part by weight or more and 10 parts by weight or less.
- the layer (B) included in the color conversion film according to the embodiment of the present invention is a transparent resin layer having an oxygen barrier property.
- the oxygen barrier property indicates a characteristic of low oxygen permeability.
- the oxygen permeability of layer (B) is not more than 1.0cc / m 2 ⁇ day ⁇ atm , preferably not more than 0.7cc / m 2 ⁇ day ⁇ atm , 0.5cc / More preferably, it is not more than m 2 ⁇ day ⁇ atm.
- the oxygen permeability is a flat test piece having a uniform film thickness. Unless otherwise specified, the oxygen permeability of MOCON (USA) manufactured at a temperature of 20 ° C. and a humidity of 0% RH. It is a value when measured based on the electrolytic sensor method described in JIS K7126-2 (2006) using a measuring device (model name, “Oxytran” (registered trademark) (“OXTRAN” 2/20)). .
- the cause of deterioration of the organic light emitting material in the color conversion film is oxidative deterioration due to oxygen under light irradiation. Therefore, by forming an oxygen barrier layer between the layer (A) and the outside world, the oxidative deterioration of the organic light emitting material can be suppressed, and the durability of the color conversion film can be greatly improved.
- the color conversion film in the present invention does not necessarily require an inorganic compound layer excellent in water vapor barrier properties, and preferably uses an oxygen barrier transparent resin layer that is excellent in terms of oxygen barrier properties, flexibility, and cost.
- the (B) layer may be provided at any position of the color conversion film as long as the oxygen transmission to the (A) layer can be suppressed.
- the (B) layer is preferably provided on at least one surface of the (A) layer, for example, as illustrated in FIGS.
- the layers are laminated in the order of (B) layer / (A) layer / (B) layer.
- These (A) layer and (B) layer may be in direct contact or may have other layers between them, but from the viewpoint of suppressing oxygen permeation, they are in direct contact or only the adhesive layer described later. It is preferable to laminate via.
- the layer is transparent so as not to disturb the light emission characteristics of the color conversion film.
- transparent means that the absorption and scattering of light in the visible range is small, and specifically, the total light transmittance is 80% or more. More preferably, it is 85% or more, and particularly preferably 90% or more.
- the haze is 7% or less. More preferably, it is 5% or less, and further preferably 2% or less. Particularly preferably, it is 1% or less.
- the total light transmittance and haze were measured by using a flat test piece having a uniform film thickness and at a temperature of 23 ° C. and a humidity of 50% RH in accordance with JIS K7361 (1997). It is a value when measured by a meter NDH2000.
- the transparent resin preferably used for the layer (B) includes resins such as polyvinyl chloride, nylon, polyvinyl fluoride, polyvinylidene chloride, polyacrylonitrile, polyvinyl alcohol, ethylene-vinyl alcohol copolymer, and mixtures of these resins. Can be mentioned. Among these, polyvinylidene chloride, polyacrylonitrile, ethylene-vinyl alcohol copolymer, and polyvinyl alcohol have a very small oxygen permeability coefficient, and therefore the layer (B) preferably contains these resins. Further, the layer (B) further preferably contains polyvinylidene chloride, polyvinyl alcohol, and an ethylene-vinyl alcohol copolymer from the viewpoint of being hardly discolored.
- the polyvinyl alcohol or the ethylene-vinyl alcohol copolymer is preferably included. It is particularly preferred to include a polymer. These resins may be used singly or mixed with different resins, but from the viewpoint of film uniformity and cost, a film made of a single resin is more preferable.
- a polyol resin can also be suitably used for the (B) layer.
- the polyol-based resin is a resin having many hydroxyl groups in the molecular chain, and the weight ratio of the hydroxyl groups in the resin is preferably 15% or more.
- the average number of hydroxyl groups in one molecular chain of the resin can be obtained from the hydroxyl equivalent weight or hydroxyl value of the resin.
- the number average molecular weight of the resin is a value determined by a known method according to JIS K7252 (2016).
- Polyol resins exhibit high gas barrier properties by partially forming hydrogen bonds between molecular chains via hydroxyl groups and reducing the free volume of the resin.
- the polyol resin has a higher gas barrier property as the proportion of hydroxyl groups is larger. Therefore, the weight proportion of hydroxyl groups in the resin is preferably 20% or more, more preferably 25% or more. Preferably, it is 30% or more, more preferably 35% or more.
- the weight ratio of the hydroxyl group in the resin is preferably 60% or less, and more preferably 50% or less.
- polyol resins saponified products of vinyl acetate such as polyvinyl alcohol, ethylene-vinyl alcohol copolymers, and mixtures containing these resins are preferred because of their particularly excellent oxygen barrier properties.
- Table 2 shows the ratio of the weight of the hydroxyl group when the saponification degree is 100 mol% in these resins.
- a single resin may be used, or a mixture of two or more kinds of resins may be used. From the viewpoint of uniformity of the resin layer and cost, it is more preferable to use a single resin. .
- polyvinyl alcohol for example, a saponified product of polyvinyl acetate in which 98 mol% or more of acetyl group is saponified can be used.
- ethylene-vinyl alcohol copolymer for example, a saponified ethylene-vinyl acetate copolymer having an ethylene content of 20 to 70% having 98% by mole or more of acetyl group saponified can be used.
- polyvinyl alcohol or ethylene-vinyl alcohol copolymer commercially available resins and films can be used. Specific examples include polyvinyl alcohol resin PVA117 manufactured by Kuraray Co., Ltd., ethylene-vinyl alcohol copolymer (“EVAL” (registered trademark)) resins L171B, F171B, and film EF-XL manufactured by Kuraray Co., Ltd.
- EVAL ethylene-vinyl alcohol copolymer
- the layer (B) is also preferably a cured product layer of a polyol resin and a resin composition containing a silicon compound represented by the following general formula (6) and a hydrolyzate thereof. .
- R 12 may be the same or different and is selected from the group consisting of hydrogen, an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, and a silyl group.
- L 1 may be the same or different and is selected from a single bond, an alkylene group, and a phenylene group.
- Y may be the same or different, and hydrogen, alkyl group, cycloalkyl group, heterocyclic group, alkenyl group, cycloalkenyl group, alkynyl group, hydroxyl group, thiol group, glycidyl group, alkoxy group, alkylthio group, glycidyl Ether group, aryl ether group, aryl thioether group, aryl group, heteroaryl group, halogen, cyano group, aldehyde group, carbonyl group, carboxyl group, oxycarbonyl group, carbamoyl group, amino group, nitro group, boryl group, phosphine oxide Selected from the group consisting of groups.
- n is an integer of 0 or more and 4 or less.
- the silicon compound represented by the general formula (6) may be a single component or a mixture of two or more.
- R 12 is preferably an alkyl group or a cycloalkyl group.
- R 12 is more preferably an alkyl group, particularly an alkyl group having 6 or less carbon atoms, and more preferably a methyl group, an ethyl group, a propyl group, or a butyl group. Particularly preferred is a methyl group or an ethyl group.
- L 1 is preferably a single bond or an alkylene group.
- L 1 is an alkylene group
- the number of carbon atoms is preferably 6 or less because the strength of the crosslinked structure described later is increased.
- n is 2 or less and -OR 12 is 2 or more, the strength of the crosslinked structure described later is increased, which is preferable. More preferably, n is 1 or less.
- An example of the silicon compound represented by the general formula (6) is shown below, but the silicon compound is not limited to these.
- Polyol-based resins have many hydroxyl groups in their molecular chains, and therefore easily swell under high temperature and high humidity conditions. Since swelling will increase the free volume of the polyol resin, the oxygen barrier properties of the polyol resin will be reduced.
- the silicon compound represented by the general formula (6) and the hydrolyzate thereof are linked to the hydroxyl group of the polyol resin by dehydration condensation, thereby forming a crosslinked structure and exhibiting an effect of suppressing the swelling of the polyol resin. . Therefore, the layer (B) can maintain a high oxygen barrier property even under high temperature and high humidity conditions.
- the content rate of the silicon atom in (B) layer is 1 wt% or more and 20 wt% or less. More preferably, it is 3 wt% or more and 15 wt% or less, and further preferably 5 wt% or more and 12 wt% or less.
- an inorganic compound layer having an excellent water vapor barrier property may be formed on the surface of the layer (B).
- the inorganic compound layer for example, silicon oxide, aluminum oxide, titanium oxide, tantalum oxide, zinc oxide, tin oxide, indium oxide, yttrium oxide, magnesium oxide, and other inorganic oxides, silicon nitride, aluminum nitride, titanium nitride, Examples thereof include inorganic nitrides such as silicon carbonitride, mixtures thereof, metal oxide thin films and metal nitride thin films obtained by adding other elements to these.
- silicon oxide and aluminum oxide are preferable, and aluminum oxide can be particularly preferably used.
- the (B) layer has an antioxidant, a curing agent, a cross-linking agent, a processing and heat stabilizer, and an ultraviolet absorber as necessary, as long as it does not excessively affect the light emission and durability of the (A) layer. You may add light-resistant stabilizers, such as an agent.
- the thickness of the (B) layer is not particularly limited, but is preferably 100 ⁇ m or less from the viewpoint of flexibility and cost of the entire color conversion film. More preferably, it is 50 micrometers or less, More preferably, it is 20 micrometers or less. Particularly preferably, it is 10 ⁇ m or less, and may be 1 ⁇ m or less. However, from the viewpoint of ease of layer formation, it is preferably 0.01 ⁇ m or more.
- the layer (B) by using a resin having a high oxygen barrier property for the layer (B), the layer (B) can exhibit a sufficient oxygen barrier property even with a thickness of 100 ⁇ m or less, and the organic light emitting material is deteriorated. Can be suppressed.
- a resin having a high oxygen barrier property for the layer (B) when polyvinyl alcohol or an ethylene-vinyl alcohol copolymer is used for the (B) layer, even if the (B) layer has a thickness of 20 ⁇ m or less, an excellent oxygen barrier property can be exhibited. Since the (B) layer is thin, the thickness of the entire color conversion film can be reduced, and a color conversion film having high flexibility and low cost can be realized.
- Such a color conversion film is thin and excellent in flexibility, it can be used in a complicated shape other than a flat surface such as a curved surface, and has a high degree of freedom when incorporated in a light source unit described later. Is possible.
- the color conversion film according to the embodiment of the present invention may have, for example, the following layers in addition to the (A) layer and the (B) layer.
- Base material layer As the base material layer (for example, the base material layer 10 shown in FIGS. 1 to 3), a known metal, film, glass, ceramic, paper, or the like can be used without particular limitation.
- a base material layer aluminum (including aluminum alloy), zinc, copper, iron and other metal plates and foils, cellulose acetate, polyethylene terephthalate, polyethylene, polyester, polyamide, polyimide, polyphenylene sulfide, polystyrene, polypropylene Polycarbonate, polyvinyl acetal, aramid, silicone, polyolefin, thermoplastic fluororesin, plastic film such as tetrafluoroethylene and ethylene copolymer (ETFE), ⁇ -polyolefin resin, polycaprolactone resin, acrylic resin, silicone resin and Plastic film made of a copolymer resin of these and ethylene, paper laminated with the plastic, or paper coated with the plastic Paper said metal is laminated or deposited, the metals and plastic film laminated or
- glass and resin films are preferably used because of the ease of producing the color conversion film and the ease of forming the color conversion film. Further, a film having high strength is preferable so that there is no fear of breakage when the film-like base material layer is handled. Resin films are preferred in terms of their required characteristics and economy, and among these, plastic films selected from the group consisting of polyethylene terephthalate, polyphenylene sulfide, polycarbonate, and polypropylene are preferred in terms of economy and handleability. In addition, when the color conversion film is dried or when the color conversion film is press-molded at a high temperature of 200 ° C. or higher by an extruder, a polyimide film is preferable in terms of heat resistance.
- the surface of the base material layer may be subjected to a release treatment in advance.
- the base material layer may be subjected to an easy adhesion treatment on the surface in advance.
- an inorganic compound layer having excellent water vapor barrier properties may be formed on the surface of the base material layer. This is because if the substrate layer itself is provided with a water vapor barrier property, the amount of water vapor reaching the layer (B) is reduced.
- the inorganic compound layer the same layer as described above can be suitably used.
- the thickness of the base material layer is not particularly limited, but the lower limit is preferably 10 ⁇ m or more, and more preferably 25 ⁇ m or more. From the viewpoint of heat resistance, 38 nm or more is more preferable. Moreover, as an upper limit, 5000 micrometers or less are preferable and 3000 micrometers or less are more preferable.
- an adhesive layer may be provided between the respective layers as necessary.
- any known material can be used without particular limitation as long as it does not excessively affect the light emission and durability of the color conversion film.
- a photo-curing material a thermosetting material, an anaerobic curing material, or a thermoplastic material can be preferably used.
- a thermosetting material is more preferable, and in particular, a temperature of 0 ° C. to 150 ° C. Materials that can be cured are preferred.
- the thickness of the adhesive layer is not particularly limited, but is preferably 0.01 to 100 ⁇ m, and more preferably 0.01 to 25 ⁇ m. More preferably, the thickness is 0.05 to 5 ⁇ m, and particularly preferably 0.05 to 1 ⁇ m.
- the color conversion film according to the embodiment of the present invention has a light diffusing layer, an antireflection function, an antiglare function, an antireflection antiglare function, a hard coat function (friction resistance function), charging, depending on the required function.
- An auxiliary layer having a prevention function, an antifouling function, an electromagnetic wave shielding function, an infrared cut function, an ultraviolet cut function, a water vapor barrier function, a polarization function, and a toning function may be further provided.
- the layer having a water vapor barrier function examples include inorganic oxides such as silicon oxide, aluminum oxide, titanium oxide, tantalum oxide, zinc oxide, tin oxide, indium oxide, yttrium oxide, and magnesium oxide, silicon nitride, aluminum nitride, Inorganic nitrides such as titanium nitride and silicon carbonitride, or mixtures thereof, metal oxide thin films and metal nitride thin films obtained by adding other elements to these, polyethylene, polypropylene, nylon, polyvinylidene chloride, vinylidene chloride Examples thereof include films made of various resins such as vinyl chloride, a copolymer of vinylidene chloride and acrylonitrile, a fluorine resin, a polyvinyl alcohol resin such as a saponified vinyl acetate.
- inorganic oxides such as silicon oxide, aluminum oxide, titanium oxide, tantalum oxide, zinc oxide, tin oxide, indium oxide, yttrium oxide, and magnesium oxide
- the composition for producing the layer (A) is produced as follows. Specifically, a predetermined amount of the above-described organic light emitting material, binder resin, additive and the like are mixed. At this time, a solvent may be mixed as necessary.
- the solvent is not particularly limited as long as it can adjust the viscosity of the resin in a fluid state and does not excessively affect the light emission and durability of the luminescent material.
- solvents include water, 2-propanol, ethanol, toluene, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, hexane, acetone, terpineol, texanol, methyl cellosolve, butyl carbitol, butyl carbitol acetate, and propylene glycol monomethyl.
- Examples include ether acetate. It is also possible to use a mixture of two or more of these solvents.
- toluene is particularly preferably used because it does not affect the deterioration of the organic light emitting material and has a small residual amount after drying.
- the mixture is uniformly mixed and dispersed with a homogenizer, a self-revolving stirrer, a three-roller, a ball mill, a planetary ball mill, a bead mill or the like.
- a composition for layer preparation is obtained.
- Defoaming is preferably carried out under vacuum or reduced pressure conditions after mixing or dispersing. Further, a specific component may be mixed in advance or a process such as aging may be performed. It is also possible to remove the solvent with an evaporator to obtain a desired solid content concentration.
- the (A) layer is prepared by applying the composition for preparing the (A) layer onto the substrate layer, the (B) layer or the like and drying it.
- Application is reverse roll coater, blade coater, slit die coater, direct gravure coater, offset gravure coater, kiss coater, natural roll coater, air knife coater, roll blade coater, varibar roll blade coater, two stream coater, rod coater, wire A bar coater, an applicator, a dip coater, a curtain coater, a spin coater, a knife coater or the like can be used.
- Drying can be performed using a general heating device such as a hot air dryer or an infrared dryer.
- a general heating device such as a hot air dryer or an infrared dryer is used.
- the heating conditions are usually 40 ° C. to 250 ° C. for 1 minute to 5 hours, preferably 60 ° C. to 200 ° C. for 2 minutes to 4 hours. It is also possible to perform heat curing stepwise such as step cure.
- the base material layer can be changed as necessary.
- examples of a simple method include a method of performing replacement using a hot plate, a method of using a vacuum laminator and a dry film laminator, and the like, but are not limited thereto.
- the formation method of the (B) layer on the base material layer or the (A) layer is not particularly limited, but a method of applying a resin composition for (B) layer preparation, drying and curing, extrusion, or two The method of laminating
- a solvent may be mixed in the coating resin composition as necessary.
- the solvent is not particularly limited as long as it can adjust the viscosity of the resin in a fluid state and does not excessively affect the light emission and durability of the color conversion film.
- solvents include water, 2-propanol, ethanol, toluene, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, hexane, acetone, terpineol, texanol, methyl cellosolve, butyl carbitol, butyl carbitol acetate, and propylene glycol monomethyl.
- Examples include ether acetate. It is also possible to use a mixture of two or more of these solvents.
- the method of laminating each layer of the color conversion film is not particularly limited.
- a method of forming the (A) layer on the (B) layer by coating and drying, or the (B) layer on the (A) layer A method of forming by coating and drying, (A) A method of bonding a self-supporting film for layer separately formed on the layer (A), A method of bonding a self-supporting film for layer (A) separately formed on the layer (B)
- any excitation light can be used as long as it emits light in a wavelength region that can be absorbed by the organic light emitting material.
- any excitation light such as a fluorescent light source such as a hot cathode tube, a cold cathode tube, an inorganic EL, an organic electroluminescence element light source, an LED light source, an incandescent light source, or sunlight can be used in principle.
- light from an LED light source is a suitable excitation light.
- light from blue LED light sources with excitation light in the wavelength range of 430 to 500 nm is more suitable excitation in that the color purity of blue light can be increased and the light degradation of organic light-emitting materials can be suppressed.
- Light When the wavelength range of the excitation light is on the longer wavelength side, white light cannot be formed due to the lack of blue light, and when the wavelength range of the excitation light is on the shorter wavelength side, the general formula (1 ) Or a light-emitting substance such as a compound or an organic compound such as a binder resin is not preferable because it easily deteriorates by light.
- the excitation light may have one type of emission peak or two or more types of emission peaks, but in order to improve color purity, one having one type of emission peak is preferable. It is also possible to use a combination of a plurality of excitation light sources having different types of emission peaks.
- the light source unit includes at least a light source and the above-described color conversion film.
- the arrangement method of the light source and the color conversion film is not particularly limited, and the light source and the color conversion film may be in close contact with each other, or a remote phosphor type in which the light source and the color conversion film are separated from each other may be used. May be.
- the light source unit may further include a color filter for the purpose of increasing color purity.
- the excitation light in the wavelength range of 430 to 500 nm has a relatively low excitation energy, and can prevent decomposition of the light emitting substance such as the compound represented by the general formula (1).
- the light source of the light source unit is preferably a light emitting diode having a maximum light emission in a wavelength range of 430 to 500 nm.
- the light source unit in the present invention can be used for applications such as displays, lighting, interiors, signs, signboards, and the like, but is particularly preferably used for displays and lighting applications.
- a display according to an embodiment of the present invention includes at least a light source unit including the above-described color conversion film.
- the above-described light source unit is used as a backlight unit for a display such as a liquid crystal display.
- the illuminating device which concerns on embodiment of this invention is provided with the light source unit containing the above-mentioned color conversion film at least.
- this illuminating device emits white light by combining a blue LED light source as a light source unit and a color conversion film that converts blue light from the blue LED light source into light having a longer wavelength. Composed.
- the fluorescence spectrum of the compound was obtained when the compound was dissolved in toluene at a concentration of 1 ⁇ 10 ⁇ 6 mol / L using a F-2500 type spectrofluorometer (manufactured by Hitachi, Ltd.) and excited at a wavelength of 460 nm. The fluorescence spectrum of was measured.
- ⁇ Measurement of oxygen permeability> Unless otherwise specified, a flat test piece having a uniform film thickness is used, and an oxygen transmission rate measuring device (model name, “MOLCON” (USA) manufactured under the conditions of a temperature of 20 ° C. and a humidity of 0% RH. Oxytrans ”(registered trademark) (“ OXTRAN ”2/20)) was used to measure oxygen permeability based on the electrolytic sensor method described in JIS K7126-2 (2006).
- ⁇ Measurement of water vapor transmission rate> Using a flat test piece with a uniform film thickness, under the conditions of a temperature of 40 ° C. and a humidity of 90% RH, a water vapor transmission rate measuring device (model name “Permatran” (registered), manufactured by MOCON (USA) (Trademark) W3 / 31) was used to measure the water vapor transmission rate based on the method B (infrared sensor method) described in JIS K7129 (2008).
- a light emitting device equipped with each color conversion film and a blue LED element (manufactured by ProLight; model number PM2B-3LBE-SD, emission peak wavelength: 460 nm) is supplied with a current of 10 mA to light the LED chip, and a spectral radiance meter (CS -1000, manufactured by Konica Minolta) was used to measure the emission spectrum.
- the distance between each color conversion film and the blue LED element was 3 cm.
- a light emitting device equipped with each color conversion film and a blue LED element (manufactured by ProLight; model number PM2B-3LBE-SD, emission peak wavelength: 460 nm) is supplied with a current of 10 mA to light the LED chip, and a spectral radiance meter (CS -1000, manufactured by Konica Minolta) was used to measure the initial luminance.
- the distance between each color conversion film and the blue LED element was 3 cm. Thereafter, the light durability was evaluated by continuously irradiating light from the blue LED element at room temperature and observing the time until the luminance decreased by a certain amount.
- reaction solution was cooled to room temperature, and the organic layer was separated and washed with saturated brine. The organic layer was dried over magnesium sulfate and filtered, and then the solvent was distilled off. The obtained reaction product was purified by silica gel chromatography to obtain 3,5-bis (4-tert-butylphenyl) benzaldehyde (3.5 g) as a white solid.
- the absorption spectrum of Compound G-1 was as shown in FIG. 4, and showed light absorption characteristics with a blue excitation light source (460 nm). Further, the fluorescence spectrum of the compound G-1 was as shown in FIG. 5, and showed a sharp emission peak in the green region. The fluorescence quantum yield was 83%, and this compound G-1 was a compound capable of efficient color conversion.
- diisopropylethylamine (305 mg) and boron trifluoride diethyl ether complex (670 mg) were added to the mixed solution of the obtained pyromethene and toluene (10 ml) under a nitrogen stream, and the mixture was stirred at room temperature for 3 hours. Then, water (20 ml) was poured and extracted with dichloromethane (30 ml). The organic layer was washed twice with water (20 ml), dried over magnesium sulfate and evaporated. After purification by silica gel column chromatography and vacuum drying, a reddish purple powder (0.27 g) was obtained.
- the absorption spectrum of Compound R-1 was as shown in FIG. 6, and showed light absorption characteristics for blue and green excitation light sources. Further, the fluorescence spectrum of the compound R-1 was as shown in FIG. 7, and showed a sharp emission peak in the red region. The fluorescence quantum yield was 90%, and this compound R-1 was a compound capable of efficient color conversion.
- Example 1 In Example 1 of the present invention, with respect to 100 parts by weight of the silicone resin “OE-6630A / B” (manufactured by Dow Corning Toray), 0.20 parts by weight of compound G-1 as an organic light emitting material and a curing agent After mixing 0.50 parts by weight, using a planetary stirring and defoaming device “Mazerustar KK-400” (manufactured by Kurabo Industries), stirring and defoaming at 1000 rpm for 20 minutes, color conversion as a resin liquid for film production A composition was obtained.
- thermosetting adhesive layer was applied on a polyethylene terephthalate film (thickness 50 ⁇ m), and an ethylene-vinyl alcohol copolymer film (ethylene content 32 mol%, thickness 12 ⁇ m, total light transmittance 90%) was applied.
- an oxygen barrier laminate film F1 was produced.
- the oxygen barrier laminate film F1 using this ethylene-vinyl alcohol copolymer had an oxygen permeability of about 0.6 cc / m 2 ⁇ day ⁇ atm, and a water vapor permeability of about 11 g / m 2 ⁇ day. .
- Two oxygen barrier laminate films F1 were prepared.
- thermosetting adhesive layer is formed by coating on the ethylene-vinyl alcohol copolymer film (layer (B)) of one oxygen barrier laminate film F1, and the above color conversion layer ( After the (A) layer) was laminated, the “therapy” BLK was peeled off.
- thermosetting adhesive layer is formed by coating on the ethylene-vinyl alcohol copolymer film (layer (B)) of another oxygen barrier laminate film F1, and the adhesive layer is formed into a color conversion layer (( A color conversion film having the same configuration as that of the color conversion film 1 shown in FIG. In the obtained color conversion film, the average film thickness of the adhesive layer was all 0.50 ⁇ m. In FIG. 3, the thermosetting adhesive layer is not shown.
- Example 2 to 5 In Examples 2 to 5 of the present invention, as the organic light emitting material (the light emitting material of the layer (A)), the compounds described in Table 3 (compounds G-2, G-3, G) are used instead of the compound G-1. -4, G-5) A color conversion film was prepared and evaluated in the same manner as in Example 1, except that G-4) was used. The evaluation results of Examples 2 to 5 are shown in Table 3.
- Comparative Example 1 for the present invention, a film-forming resin solution was prepared in the same manner as in Example 1, and then a polyethylene terephthalate film (thickness 50 ⁇ m, oxygen permeability of about 40 cc / m 2 ⁇ day ⁇ atm) as a base layer. , Water vapor permeability of about 12 g / m 2 ⁇ day, total light transmittance of 89%) using a slit die coater, a film-forming resin solution is applied, heated at 130 ° C. for 2 hours, and dried to obtain a film thickness. A color conversion layer ((A) layer) having an average film thickness of 200 ⁇ m was formed. In Comparative Example 1, the same evaluation as in Example 1 was performed using this laminated film. The evaluation results of Comparative Example 1 are shown in Table 3.
- Comparative Examples 2 to 5 Comparative Examples 2 to 5 for the present invention, the compounds described in Table 3 (compounds G-2, G-3, G-4, and G-5) described later were used in place of the compound G-1 as the organic light-emitting material. Except for this, a color conversion film was prepared and evaluated in the same manner as in Comparative Example 1. The evaluation results of Comparative Examples 2 to 5 are shown in Table 3.
- Comparative Example 6 (Comparative Example 6)
- a polyethylene terephthalate film (thickness 50 ⁇ m, oxygen permeability of about 1.5 cc / m 2 ⁇ day ⁇ atm, with an alumina thin film layer formed on the surface as the base material layer was formed as a base material layer.
- a color conversion film was prepared and evaluated in the same manner as in Comparative Example 1 except that the water vapor transmission rate was about 0.9 g / m 2 ⁇ day, and the total light transmittance was 89%.
- the evaluation results of Comparative Example 6 are shown in Table 3.
- Example 6 In Example 6 of the present invention, 0.08 parts by weight of compound R-1 and 0.5 parts by weight of a curing agent were mixed as an organic light emitting material with respect to 100 parts by weight of a two-part thermosetting epoxy acrylic resin. Then, it was stirred at 300 rpm for 1 hour and defoamed to obtain a color conversion composition as a resin liquid for film production. The obtained color conversion composition was applied on “Therapy” BLK (manufactured by Toray Film Processing Co., Ltd.) using a bar coating method, and then dried at 120 ° C. for 5 minutes to form a color conversion layer having an average film thickness of 10 ⁇ m. Formed.
- “Therapy” BLK manufactured by Toray Film Processing Co., Ltd.
- thermosetting adhesive layer was applied on a polyethylene terephthalate film (thickness 50 ⁇ m), and an ethylene-vinyl alcohol copolymer film (ethylene content 32 mol%, thickness 15 ⁇ m, total light transmittance 90%) was applied.
- an oxygen barrier laminate film F2 was produced.
- the oxygen barrier laminate film F2 using this ethylene-vinyl alcohol copolymer had an oxygen permeability of about 0.5 cc / m 2 ⁇ day ⁇ atm, and a water vapor permeability of about 10 g / m 2 ⁇ day. .
- Two oxygen barrier laminate films F2 were prepared.
- thermosetting adhesive layer is formed by coating on the ethylene-vinyl alcohol copolymer film (layer (B)) of one oxygen barrier laminate film F2, and the above color conversion layer ( After the (A) layer) was laminated, the “therapy” BLK was peeled off.
- thermosetting adhesive layer is formed on the ethylene-vinyl alcohol copolymer film (layer (B)) of another oxygen barrier laminate film F2 by coating, and the adhesive layer is formed into a color conversion layer (( A color conversion film having the same configuration as that of the color conversion film 1 shown in FIG. In the obtained color conversion film, the average film thickness of the adhesive layer was all 0.50 ⁇ m. In FIG. 3, the thermosetting adhesive layer is not shown.
- Example 7 to 9 In Examples 7 to 9 of the present invention, the compounds described in Table 4 (compounds R-2, R-3, R) described below were used instead of the compound R-1 as the organic light emitting material (the light emitting material of the layer (A)). A color conversion film was prepared and evaluated in the same manner as in Example 6 except that -4) was used. The evaluation results of Examples 7 to 9 are shown in Table 4.
- Comparative Example 7 for the present invention, a film-forming resin solution was prepared in the same manner as in Example 6, and then a polyethylene terephthalate film (thickness 50 ⁇ m, oxygen permeability of about 40 cc / m 2 ⁇ day ⁇ atm) as a base material layer. , Water vapor permeability of about 12 g / m 2 ⁇ day, total light transmittance of 89%) using a bar coating method, a resin solution for film production was applied and then dried at 120 ° C. for 5 minutes to obtain an average film thickness A 10 ⁇ m color conversion layer (layer (A)) was formed.
- Comparative Example 7 the same evaluation as in Example 6 was performed using this laminated film. The evaluation results of Comparative Example 7 are shown in Table 4.
- Comparative Examples 8 to 10 In Comparative Examples 8 to 10 for the present invention, except that the compounds described in Table 4 (compounds R-2, R-3, R-4) described later were used instead of the compound R-1 as the organic light emitting material, In the same manner as in Comparative Example 7, a color conversion film was prepared and evaluated. The evaluation results of Comparative Examples 8 to 10 are shown in Table 4.
- Comparative Example 11 In Comparative Example 11 for the present invention, a polyethylene terephthalate film (thickness 50 ⁇ m, oxygen permeability of about 1.5 cc / m 2 ⁇ day ⁇ atm, with an alumina thin film layer formed on the surface as a base material layer was formed as a base material layer. water vapor permeability of about 0.9g / m 2 ⁇ day, except for using the total light transmittance of 89%), in the same manner as in Comparative example 7, were fabricated and evaluated the color conversion film. The evaluation results of Comparative Example 11 are shown in Table 4.
- Example 10 In Example 10 of the present invention, with respect to 100 parts by weight of the two-component thermosetting epoxy acrylic resin, 0.20 parts by weight of compound G-1 (light emitting material (a)) as an organic light emitting material, and compound R— After mixing 0.08 parts by weight of 1 (light emitting material (b)) and 0.5 parts by weight of the curing agent, the mixture is stirred at 300 rpm for 1 hour and defoamed to change the color as a resin liquid for film production. A composition was obtained. The obtained color conversion composition was applied on “Therapy” BLK (manufactured by Toray Film Processing Co., Ltd.) using a bar coating method, and then dried at 120 ° C. for 5 minutes to form a color conversion layer having an average film thickness of 10 ⁇ m. Formed.
- “Therapy” BLK manufactured by Toray Film Processing Co., Ltd.
- an oxygen barrier laminate film F3 was produced.
- the total light transmittance of the polyvinyl alcohol resin layer was 91%.
- the oxygen barrier laminate film F3 using this polyvinyl alcohol resin layer had an oxygen permeability of about 0.5 cc / m 2 ⁇ day ⁇ atm, and a water vapor permeability of about 12 g / m 2 ⁇ day. Two oxygen barrier laminate films F3 were prepared.
- thermosetting adhesive layer is formed by coating on the polyvinyl alcohol resin layer ((B) layer) of one oxygen barrier laminate film F3, and the color conversion layer ((A) layer) is formed thereon. ) was then peeled off.
- thermosetting adhesive layer is formed on the polyvinyl alcohol resin layer ((B) layer) of another oxygen barrier laminate film F3 by coating, and the adhesive layer is used as a color conversion layer ((A) layer).
- a color conversion film having the same configuration as that of the color conversion film 1 shown in FIG. 3 was produced.
- the average film thickness of the adhesive layer was all 0.50 ⁇ m.
- the thermosetting adhesive layer is not shown.
- Example 11 to 15 In Examples 11 to 15 of the present invention, the organic light-emitting materials (the light-emitting materials (a) and (b) of the layer (A)) (the compounds G-1, G-2, G-3, A color conversion film was prepared and evaluated in the same manner as in Example 10 except that G-5 and compounds R-1, R-2, and R-3) were used. Table 5 shows the evaluation results of Examples 11 to 15.
- Comparative Example 12 In Comparative Example 12 for the present invention, a film-forming resin solution was prepared in the same manner as in Example 10, and then a polyethylene terephthalate film (thickness 50 ⁇ m, oxygen permeability of about 40 cc / m 2 ⁇ day ⁇ atm) as a base material layer. water vapor transmission rate of about 12g / m 2 ⁇ day, using a bar coating method on a total light transmittance of 89%), after applying the film prepared resin solution, and dried 5 minutes at 120 ° C., an average thickness A 10 ⁇ m color conversion layer was formed. In Comparative Example 12, the same evaluation as in Example 10 was performed using this laminated film. The evaluation results of Comparative Example 12 are shown in Table 5.
- Comparative Examples 13 to 17 In Comparative Examples 13 to 17 for the present invention, the organic light-emitting materials (the light-emitting materials (a) and (b) of the layer (A)) (the compounds G-1, G-2, G-3, A color conversion film was prepared and evaluated in the same manner as in Comparative Example 12 except that G-5 and compounds R-1, R-2, and R-3) were used. The evaluation results of Comparative Examples 13 to 17 are shown in Table 5.
- Comparative Example 18 In Comparative Example 18 for the present invention, a polyethylene terephthalate film (thickness of 50 ⁇ m, oxygen permeability of about 1.5 cc / m 2 ⁇ day ⁇ atm, with an alumina thin film layer formed on the surface as the base material layer was formed. A color conversion film was prepared and evaluated in the same manner as in Comparative Example 12 except that the water vapor transmission rate was about 0.9 g / m 2 ⁇ day, and the total light transmittance was 89%. The evaluation results of Comparative Example 18 are shown in Table 5.
- Example 16 In Example 16 of the present invention, with respect to 100 parts by weight of a two-component thermosetting epoxy acrylic resin, 0.20 parts by weight of compound G-1 and 0.50 parts by weight of a curing agent were mixed as an organic light emitting material. Then, using a planetary stirring and defoaming device “Mazerustar KK-400” (made by Kurabo Industries), stirring and defoaming at 1000 rpm for 20 minutes, (A) as a layer liquid resin (film forming resin liquid) A color conversion composition was obtained. The obtained color conversion composition was applied onto “Therapy” BLK (manufactured by Toray Film Processing Co., Ltd.) using a bar coating method, and then dried at 100 ° C. for 5 minutes, and the (A) layer having an average film thickness of 10 ⁇ m That is, a color conversion layer was formed.
- “Mazerustar KK-400” made by Kurabo Industries
- oxygen barrier property laminated film F4 was produced.
- the silicon atom content in the layer (B) is 10.1 wt% when calculated from the blending ratio, and the oxygen permeability of this oxygen barrier laminate film F4 is under the environment of temperature 20 ° C. and humidity 0%. It was about 0.8 cc / m 2 ⁇ day ⁇ atm, and about 1.0 cc / m 2 ⁇ day ⁇ atm under an environment of a temperature of 50 ° C. and a humidity of 85%.
- Two oxygen barrier laminate films F4 were prepared.
- thermosetting adhesive layer is formed by coating on the polyol-based resin layer ((B) layer) of one oxygen barrier laminate film F4, and the (A) layer is laminated thereon. , "Therapy" BLK was peeled off.
- thermosetting adhesive layer is formed by coating on the polyol-based resin layer ((B) layer) of another oxygen barrier laminate film F4, and the adhesive layer is laminated on the (A) layer.
- a color conversion film having the same configuration as the color conversion film 1 shown in FIG. 3 was produced.
- the average film thickness of the adhesive layer was all 0.5 ⁇ m.
- the thermosetting adhesive layer is not shown.
- Example 17 In Example 17 of the present invention, as the organic light emitting material (the light emitting material of the layer (A)), a compound described in Table 6 (compound G-2) described later was used instead of the compound G-1. In the same manner as in Example 16, a color conversion film was prepared and evaluated. The evaluation results of Example 17 are shown in Table 6.
- Example 18 and 19 In Examples 18 and 19 of the present invention, the compounds described in Table 6 (compounds G-1 and G-2) were used as the organic light emitting material (the light emitting material of the layer (A)), and instead of the oxygen barrier laminate film F4. In addition, a color conversion film was produced and evaluated in the same manner as in Example 16 except that the oxygen barrier laminate film F3 produced in the same manner as in Example 10 was used. Table 6 shows the evaluation results of Examples 18 and 19.
- Comparative Examples 19 and 20 In Comparative Examples 19 and 20 for the present invention, the compounds described in Table 6 (compounds G-1 and G-2) were used as the organic light emitting material (the light emitting material of the layer (A)), and instead of the oxygen barrier laminate film F4.
- Example 16 except that a polyethylene terephthalate film (thickness 50 ⁇ m, oxygen permeability of about 40 cc / m 2 ⁇ day ⁇ atm, water vapor permeability of about 12 g / m 2 ⁇ day, total light transmittance 89%) was used. In the same manner, a color conversion film was prepared and evaluated. The evaluation results of Comparative Examples 19 and 20 are shown in Table 6.
- the color conversion film according to the present invention and the light source unit, display, and illumination device including the color conversion film satisfy both high color reproducibility and high durability, and the light source unit, display, and illumination device including the color conversion film. Suitable for
- Color conversion film 10 Base layer 11 Color conversion layer 12 Oxygen barrier transparent resin layer
Abstract
Description
(A)層:少なくとも1種の有機発光材料、およびバインダー樹脂を含有する、連続層である色変換層
(B)層:酸素透過度が1.0cc/m2・day・atm以下である透明樹脂層
本発明の実施の形態に係る色変換フィルムは、光源などの発光体からの入射光をこの入射光よりも長波長の光に変換するものであって、少なくとも、色変換層である(A)層と、酸素バリア性をもつ透明樹脂層である(B)層と、を含む積層フィルムである。本発明において、色変換フィルム内に、(A)層および(B)層は、それぞれ複数層含まれてもよく、複数層含まれる場合、それぞれ組成や機能、膜厚は同じでも異なっていてもよい。例えば、発光体からの青色光を緑色光に変換する色変換層(第1の(A)層)、および、発光体からの青色光または緑色光を赤色光に変換する色変換層(第2の(A)層)のように、互いに機能が異なる複数種類の(A)層が、色変換フィルム内に含まれていてもよい。同様に、互いに異なる樹脂からなる第1の(B)層および第2の(B)層のように、組成が異なる複数種類の(B)層が、色変換フィルム内に含まれていてもよい。
本発明の実施の形態に係る色変換フィルムに含まれる(A)層は、少なくとも1種の有機発光材料およびバインダー樹脂を含有し、入射光を、その入射光よりも長波長の光に変換する色変換層として機能する。
(A)層は、少なくとも1種の有機発光材料を含む。ここで、本発明における発光材料とは、何らかの光が照射されたときに、その光の波長とは異なる波長の光を発する材料のことをいう。高効率な色変換を達成するためには、発光材料が量子収率の高い発光特性を示すことが好ましい。一般に、発光材料としては、無機蛍光体、蛍光顔料、蛍光染料、量子ドット等の公知の発光材料が挙げられるが、分散の均一性、使用量の低減、環境負荷の低減の観点から、本発明においては有機発光材料が用いられる。
本発明の(A)層におけるバインダー樹脂は、有機発光材料等と混合して連続相を形成するものであり、成型加工性、透明性、耐熱性等に優れる材料であればよい。バインダー樹脂の例としては、例えば、アクリル酸系、メタクリル酸系、ポリケイ皮酸ビニル系、環ゴム系等の反応性ビニル基を有する光硬化型レジスト材料、エポキシ樹脂、シリコーン樹脂(シリコーンゴム、シリコーンゲル等のオルガノポリシロキサン硬化物(架橋物)を含む)、ウレア樹脂、フッ素樹脂、ポリカーボネート樹脂、アクリル樹脂、ウレタン樹脂、メラミン樹脂、ポリビニル樹脂、ポリアミド樹脂、フェノール樹脂、ポリビニルアルコール樹脂、ポリビニルブチラール樹脂、セルロース樹脂、脂肪族エステル樹脂、芳香族エステル樹脂、脂肪族ポリオレフィン樹脂、芳香族ポリオレフィン樹脂などの公知のものが挙げられる。また、バインダー樹脂として、これらの共重合樹脂を用いても構わない。これらの樹脂を適宜設計することで、本発明の実施の形態に係る色変換フィルムに有用なバインダー樹脂が得られる。
(A)層は、有機発光材料とバインダー樹脂以外に、酸化防止剤、加工および熱安定化剤、紫外線吸収剤等の耐光性安定化剤、塗布膜安定化のための分散剤やレベリング剤、可塑剤、エポキシ化合物などの架橋剤、アミン・酸無水物・イミダゾールなどの硬化剤、シート表面の改質剤としてシランカップリング剤等の接着補助剤、色変換材沈降抑制剤としてシリカ粒子やシリコーン微粒子等の無機粒子およびシランカップリング剤などを含有してもよい。
本発明の実施の形態に係る色変換フィルムに含まれる(B)層は、酸素バリア性の透明樹脂層である。酸素バリア性とは、酸素透過度が低い特性を示す。本発明においては、(B)層の酸素透過度は、1.0cc/m2・day・atm以下であり、0.7cc/m2・day・atm以下であることが好ましく、0.5cc/m2・day・atm以下であることがさらに好ましい。
本発明の実施の形態に係る色変換フィルムは、(A)層および(B)層以外にも、例えば、以下のような層を有していてもよい。
基材層(例えば図1~3に示す基材層10等)としては、特に制限無く公知の金属、フィルム、ガラス、セラミック、紙等を使用することができる。具体的には、基材層として、アルミニウム(アルミニウム合金も含む)、亜鉛、銅、鉄などの金属板や箔、セルロースアセテート、ポリエチレンテレフタレート、ポリエチレン、ポリエステル、ポリアミド、ポリイミド、ポリフェニレンサルファイド、ポリスチレン、ポリプロピレン、ポリカーボネート、ポリビニルアセタール、アラミド、シリコーン、ポリオレフィン、熱可塑性フッ素樹脂、テトラフルオロエチレンとエチレンの共重合体(ETFE)などのプラスチックのフィルム、α-ポリオレフィン樹脂、ポリカプロラクトン樹脂、アクリル樹脂、シリコーン樹脂およびこれらとエチレンの共重合樹脂からなるプラスチックのフィルム、前記プラスチックがラミネートされた紙、または前記プラスチックによりコーティングされた紙、前記金属がラミネートまたは蒸着された紙、前記金属がラミネートまたは蒸着されたプラスチックフィルムなどが挙げられる。また、基材層が金属板である場合、その表面にクロム系やニッケル系などのメッキ処理やセラミック処理が施されていてもよい。
本発明の実施の形態に係る色変換フィルムにおいて、それぞれの層の間には、必要に応じて接着層を設けてもよい。接着層としては、色変換フィルムの発光および耐久性に過度な影響を与えないものであれば、特に制限無く公知の材料を用いることができる。強固な接着が必要な場合、光硬化材料や熱硬化材料、嫌気性硬化材料、熱可塑性材料を好ましく用いることができるが、中でも、熱硬化材料がより好ましく、特に、0℃~150℃での硬化が可能である材料が好ましい。
本発明の実施の形態に係る色変換フィルムには、要求される機能に応じて、光拡散層、反射防止機能、防眩機能、反射防止防眩機能、ハードコート機能(耐摩擦機能)、帯電防止機能、防汚機能、電磁波シールド機能、赤外線カット機能、紫外線カット機能、水蒸気バリア機能、偏光機能、調色機能を有した補助層をさらに設けてもよい。
以下に、本発明の実施の形態に係る色変換フィルムの製造方法の一例を説明する。この製造方法では、まず、(A)層作製用の組成物を以下のように製造する。具体的には、前述した有機発光材料、バインダー樹脂、添加物等を所定量混合する。この際、必要に応じて溶媒を混合してもよい。
励起光の種類は、有機発光材料が吸収可能な波長領域に発光を示すものであれば、いずれの励起光でも用いることができる。例えば、熱陰極管や冷陰極管、無機ELなどの蛍光性光源、有機エレクトロルミネッセンス素子光源、LED光源、白熱光源、あるいは太陽光など、いずれの励起光でも原理的には利用可能である。
本発明の実施の形態に係る光源ユニットは、少なくとも光源および上述の色変換フィルムを含む。光源と色変換フィルムとの配置方法については、特に限定されず、光源と色変換フィルムとを密着させた構成を取ってもよいし、光源と色変換フィルムとを離したリモートフォスファー形式を取ってもよい。また、光源ユニットは、色純度を高める目的で、さらにカラーフィルターを含む構成を取ってもよい。
本発明の実施の形態に係るディスプレイは、少なくとも、上述の色変換フィルムを含む光源ユニットを備える。例えば、液晶ディスプレイ等のディスプレイには、バックライトユニットとして、上述の光源ユニットが用いられる。また、本発明の実施の形態に係る照明装置は、少なくとも、上述の色変換フィルムを含む光源ユニットを備える。例えば、この照明装置は、光源ユニットとしての青色LED光源と、この青色LED光源からの青色光をこれよりも長波長の光に変換する色変換フィルムとを組み合わせて、白色光を発光するように構成される。
化合物の1H-NMRは、超伝導FTNMR EX-270(日本電子(株)製)を用い、重クロロホルム溶液にて測定を行った。
化合物の吸収スペクトルは、U-3200形分光光度計(日立製作所(株)製)を用い、化合物をトルエンに1×10-6mol/Lの濃度で溶解させて測定を行った。
化合物の蛍光スペクトルは、F-2500形分光蛍光光度計(日立製作所(株)製)を用い、化合物をトルエンに1×10-6mol/Lの濃度で溶解させ、波長460nmで励起させた際の蛍光スペクトルを測定した。
膜厚が均一な平面状試験片を用い、特に記載がない場合、温度20℃、湿度0%RHの条件で、モコン(MOCON)社(米国)製の酸素透過率測定装置(機種名、“オキシトラン”(登録商標)(“OXTRAN ”2/20))を使用して、JIS K7126-2(2006)に記載の電解センサ法に基づいて、酸素透過度を測定した。
膜厚が均一な平面状試験片を用い、温度40℃、湿度90%RHの条件で、モコン(MOCON)社(米国)製の水蒸気透過率測定装置(機種名、“パ-マトラン”(登録商標)W3/31)を使用して、JIS K7129(2008)に記載のB法(赤外センサー法)に基づいて、水蒸気透過度を測定した。
膜厚が均一な平面状試験片を用い、温度23℃、湿度50%RHの条件で、JIS K7361(1997)に従って、日本電色工業(株)製ヘイズメーターNDH2000により、全光線透過率を測定した。
各色変換フィルムおよび青色LED素子(ProLight社製;型番PM2B-3LBE-SD、発光ピーク波長:460nm)を搭載した発光装置に、10mAの電流を流してLEDチップを点灯させ、分光放射輝度計(CS-1000、コニカミノルタ社製)を用いて、発光スペクトルを測定した。なお、各色変換フィルムと青色LED素子との距離を3cmとした。
各色変換フィルムおよび青色LED素子(ProLight社製;型番PM2B-3LBE-SD、発光ピーク波長:460nm)を搭載した発光装置に、10mAの電流を流してLEDチップを点灯させ、分光放射輝度計(CS-1000、コニカミノルタ社製)を用いて初期輝度を測定した。なお、各色変換フィルムと青色LED素子との距離を3cmとした。その後、室温下で青色LED素子からの光を連続照射し、輝度が一定量低下するまでの時間を観測することで、光耐久性を評価した。
以下に、本発明における合成例1の化合物G-1の合成方法について説明する。化合物G-1の合成方法では、3,5-ジブロモベンズアルデヒド(3.0g)、4-t-ブチルフェニルボロン酸(5.3g)、テトラキス(トリフェニルホスフィン)パラジウム(0)(0.4g)、炭酸カリウム(2.0g)をフラスコに入れ、窒素置換した。ついで、脱気したトルエン(30mL)および脱気した水(10mL)を加え、4時間還流した。この反応溶液を室温まで冷却し、有機層を、分液した後に飽和食塩水で洗浄した。この有機層を硫酸マグネシウムで乾燥し、ろ過後、溶媒を留去した。得られた反応生成物をシリカゲルクロマトグラフィーにより精製し、3,5-ビス(4-t-ブチルフェニル)ベンズアルデヒド(3.5g)を白色固体として得た。
1H-NMR(CDCl3(d=ppm)):7.95(s,1H)、7.63-7.48(m,10H)、6.00(s,2H)、2.58(s,6H)、1.50(s,6H)、1.37(s,18H)。
以下に、本発明における合成例2の化合物R-1の合成方法について説明する。化合物R-1の合成方法では、4-(4-t-ブチルフェニル)-2-(4-メトキシフェニル)ピロール(300mg)、2-メトキシベンゾイルクロリド(201mg)とトルエン(10ml)の混合溶液を窒素気流下、120℃で6時間加熱した。この加熱溶液を室温に冷却後、エバポレートした。ついで、エタノール(20ml)で洗浄し、真空乾燥した後、2-(2-メトキシベンゾイル)-3-(4-t-ブチルフェニル)-5-(4-メトキシフェニル)ピロール(260mg)を得た。
1H-NMR(CDCl3,ppm):1.19(s,18H)、3.42(s,3H)、3.85(s,6H)、5.72(d,1H)、6.20(t,1H)、6.42-6.97(m,16H),7.89(d,4H)。
本発明の実施例1では、シリコーン樹脂“OE-6630A/B”(東レ・ダウコーニング社製)100重量部に対して、有機発光材料として化合物G-1を0.20重量部、硬化剤を0.50重量部、混合した後、遊星式撹拌・脱泡装置“マゼルスターKK-400”(クラボウ製)を用い、1000rpmで20分間撹拌・脱泡して、フィルム作製用樹脂液としての色変換組成物を得た。ついで、スリットダイコーターを用いてフィルム作製用樹脂液を“セラピール”BLK(東レフィルム加工株式会社製)上に塗布し、130℃で2時間加熱、乾燥して平均膜厚200μmの色変換層を形成した。
本発明の実施例2~5では、有機発光材料((A)層の発光材料)として、化合物G-1の代わりに後述の表3に記載した化合物(化合物G-2、G-3、G-4、G-5)を用いたこと以外は、実施例1と同様にして、色変換フィルムを作製して評価した。実施例2~5の評価結果を表3に示す。
本発明に対する比較例1では、実施例1と同様にしてフィルム作製用樹脂液を作製した後、基材層としてのポリエチレンテレフタレートフィルム(厚さ50μm、酸素透過度約40cc/m2・day・atm、水蒸気透過度約12g/m2・day、全光線透過率89%)の上にスリットダイコーターを用いてフィルム作製用樹脂液を塗布し、130℃で2時間加熱、乾燥して、膜厚平均膜厚200μmの色変換層((A)層)を形成した。比較例1では、この積層フィルムを用いて、実施例1と同様の評価を行った。比較例1の評価結果を表3に示す。
本発明に対する比較例2~5では、有機発光材料として化合物G-1の代わりに後述の表3に記載した化合物(化合物G-2、G-3、G-4、G-5)を用いたこと以外は、比較例1と同様にして、色変換フィルムを作製して評価した。比較例2~5の評価結果を表3に示す。
本発明に対する比較例6では、基材層として、表面にアルミナ蒸着処理を行い、アルミナ薄膜層を形成したポリエチレンテレフタレートフィルム(厚さ50μm、酸素透過度約1.5cc/m2・day・atm、水蒸気透過度約0.9g/m2・day、全光線透過率89%)を用いたこと以外は、比較例1と同様にして、色変換フィルムを作製して評価した。比較例6の評価結果を表3に示す。
本発明の実施例6では、二液型熱硬化性エポキシ系アクリル樹脂100重量部に対して、有機発光材料として化合物R-1を0.08重量部、硬化剤を0.5重量部、混合した後、300rpmで1時間攪拌し、脱泡することで、フィルム作製用樹脂液としての色変換組成物を得た。得られた色変換組成物を“セラピール”BLK(東レフィルム加工株式会社製)上にバーコーティング方式を用いて、塗布した後、120℃で5分間乾燥し、平均膜厚10μmの色変換層を形成した。
本発明の実施例7~9では、有機発光材料((A)層の発光材料)として、化合物R-1の代わりに後述の表4に記載した化合物(化合物R-2、R-3、R-4)を用いたこと以外は、実施例6と同様にして、色変換フィルムを作製して評価した。実施例7~9の評価結果を表4に示す。
本発明に対する比較例7では、実施例6と同様にしてフィルム作製用樹脂液を作製した後、基材層としてのポリエチレンテレフタレートフィルム(厚さ50μm、酸素透過度約40cc/m2・day・atm、水蒸気透過度約12g/m2・day、全光線透過率89%)の上にバーコーティング方式を用いて、フィルム作製用樹脂液を塗布した後、120℃で5分間乾燥し、平均膜厚10μmの色変換層((A)層)を形成した。比較例7では、この積層フィルムを用いて、実施例6と同様の評価を行った。比較例7の評価結果を表4に示す。
本発明に対する比較例8~10では、有機発光材料として化合物R-1の代わりに後述の表4に記載した化合物(化合物R-2、R-3、R-4)を用いたこと以外は、比較例7と同様にして、色変換フィルムを作製して評価した。比較例8~10の評価結果を表4に示す。
本発明に対する比較例11では、基材層として、表面にアルミナ蒸着処理を行い、アルミナ薄膜層を形成したポリエチレンテレフタレートフィルム(厚さ50μm、酸素透過度約1.5cc/m2・day・atm、水蒸気透過度約0.9g/m2・day、全光線透過率89%)を用いたこと以外は、比較例7と同様にして、色変換フィルムを作製して評価した。比較例11の評価結果を表4に示す。
本発明の実施例10では、二液型熱硬化性エポキシ系アクリル樹脂100重量部に対して、有機発光材料として化合物G-1(発光材料(a))を0.20重量部、化合物R-1(発光材料(b))を0.08重量部、硬化剤を0.5重量部、混合した後、300rpmで1時間攪拌し、脱泡することで、フィルム作製用樹脂液としての色変換組成物を得た。得られた色変換組成物を“セラピール”BLK(東レフィルム加工株式会社製)上にバーコーティング方式を用いて、塗布した後、120℃で5分間乾燥し、平均膜厚10μmの色変換層を形成した。
本発明の実施例11~15では、有機発光材料((A)層の発光材料(a)、(b))として表5に記載した化合物(化合物G-1、G-2、G-3、G-5、化合物R-1、R-2、R-3)を用いたこと以外は、実施例10と同様にして、色変換フィルムを作製して評価した。実施例11~15の評価結果を表5に示す。
本発明に対する比較例12では、実施例10と同様にしてフィルム作製用樹脂液を作製した後、基材層としてのポリエチレンテレフタレートフィルム(厚さ50μm、酸素透過度約40cc/m2・day・atm、水蒸気透過度約12g/m2・day、全光線透過率89%)の上にバーコーティング方式を用いて、フィルム作製用樹脂液を塗布した後、120℃で5分間乾燥し、平均膜厚10μmの色変換層を形成した。比較例12では、この積層フィルムを用いて、実施例10と同様の評価を行った。比較例12の評価結果を表5に示す。
本発明に対する比較例13~17では、有機発光材料((A)層の発光材料(a)、(b))として表5に記載した化合物(化合物G-1、G-2、G-3、G-5、化合物R-1、R-2、R-3)を用いたこと以外は、比較例12と同様にして、色変換フィルムを作製して評価した。比較例13~17の評価結果を表5に示す。
本発明に対する比較例18では、基材層として、表面にアルミナ蒸着処理を行い、アルミナ薄膜層を形成したポリエチレンテレフタレートフィルム(厚さ50μm、酸素透過度約1.5cc/m2・day・atm、水蒸気透過度約0.9g/m2・day、全光線透過率89%)を用いたこと以外は、比較例12と同様にして、色変換フィルムを作製して評価した。比較例18の評価結果を表5に示す。
本発明の実施例16では、二液型熱硬化性エポキシ系アクリル樹脂100重量部に対して、有機発光材料として化合物G-1を0.20重量部、硬化剤を0.50重量部、混合した後、遊星式撹拌・脱泡装置“マゼルスターKK-400”(クラボウ製)を用い、1000rpmで20分間撹拌・脱泡して、(A)層用樹脂液(フィルム作成用樹脂液)としての色変換組成物を得た。得られた色変換組成物を“セラピール”BLK(東レフィルム加工株式会社製)上にバーコーティング方式を用いて、塗布した後、100℃で5分間乾燥し、平均膜厚10μmの(A)層すなわち色変換層を形成した。
本発明の実施例17では、有機発光材料((A)層の発光材料)として、化合物G-1の代わりに後述の表6に記載した化合物(化合物G-2)を用いたこと以外は、実施例16と同様にして、色変換フィルムを作製して評価した。実施例17の評価結果を表6に示す。
本発明の実施例18、19では、有機発光材料((A)層の発光材料)として表6に記載した化合物(化合物G-1、G-2)を用い、酸素バリア性積層フィルムF4の代わりに、実施例10と同様にして作製した酸素バリア性積層フィルムF3を用いたこと以外は、実施例16と同様にして、色変換フィルムを作製して評価した。実施例18、19の評価結果を表6に示す。
本発明に対する比較例19、20では、有機発光材料((A)層の発光材料)として表6に記載した化合物(化合物G-1、G-2)を用い、酸素バリア性積層フィルムF4の代わりにポリエチレンテレフタレートフィルム(厚さ50μm、酸素透過度約40cc/m2・day・atm、水蒸気透過度約12g/m2・day、全光線透過率89%)を用いたこと以外は、実施例16と同様にして、色変換フィルムを作製して評価した。比較例19、20の評価結果を表6に示す。
10 基材層
11 色変換層
12 酸素バリア性透明樹脂層
Claims (17)
- 入射光を、その入射光よりも長波長の光に変換する色変換フィルムであって、
少なくとも以下の(A)層および(B)層を含む積層フィルムである、
ことを特徴とする色変換フィルム。
(A)層:少なくとも1種の有機発光材料、およびバインダー樹脂を含有する、連続層である色変換層
(B)層:酸素透過度が1.0cc/m2・day・atm以下である透明樹脂層 - 前記(A)層および前記(B)層が、前記(B)層、前記(A)層、前記(B)層の順で積層されてなる、
ことを特徴とする請求項1に記載の色変換フィルム。 - 前記(B)層を構成する透明樹脂が、ポリビニルアルコールまたはエチレン-ビニルアルコール共重合体を含む、
ことを特徴とする請求項1または2に記載の色変換フィルム。 - 前記(B)層を構成する透明樹脂が、ポリオール系樹脂である、
ことを特徴とする請求項1~3のいずれか一つに記載の色変換フィルム。 - 前記(B)層を構成する透明樹脂がポリオール系樹脂であり、該ポリオール系樹脂は、樹脂中のヒドロキシル基の重量割合が20%以上である樹脂である、
ことを特徴とする請求項1~4のいずれか一つに記載の色変換フィルム。 - 前記(B)層を構成する透明樹脂がポリオール系樹脂であり、該ポリオール系樹脂がポリビニルアルコールまたはエチレン-ビニルアルコール共重合体である、
ことを特徴とする請求項1~5のいずれか一つに記載の色変換フィルム。 - 前記(B)層が、ポリオール系樹脂と、一般式(6)で表されるケイ素化合物およびその加水分解物を含む樹脂組成物との硬化物層である、
ことを特徴とする請求項1~6のいずれか一つに記載の色変換フィルム。
- 前記(B)層におけるケイ素原子の含有率が1wt%以上、20wt%以下である、
ことを特徴とする請求項7に記載の色変換フィルム。 - 前記(B)層の厚さが100μm以下である、
ことを特徴とする請求項1~8のいずれか一つに記載の色変換フィルム。 - 前記有機発光材料が、一般式(1)で表される化合物を含有する、
ことを特徴とする請求項1~9のいずれか一つに記載の色変換フィルム。
- 一般式(1)において、XがC-R7であり、R7が一般式(2)で表される基である、
ことを特徴とする請求項10に記載の色変換フィルム。
- 一般式(1)において、R1、R3、R4およびR6が、それぞれ同じでも異なっていてもよく、置換もしくは無置換のフェニル基である、
ことを特徴とする請求項10または11に記載の色変換フィルム。 - 一般式(1)において、R1、R3、R4およびR6が、それぞれ同じでも異なっていてもよく、置換もしくは無置換のアルキル基である、
ことを特徴とする請求項10~12のいずれか一つに記載の色変換フィルム。 - 光源と、
請求項1~13のいずれか一つに記載の色変換フィルムと、
を含むことを特徴とする光源ユニット。 - 前記光源が、430nm以上、500nm以下の範囲に極大発光を有する発光ダイオードである、
ことを特徴とする請求項14に記載の光源ユニット。 - 請求項14または15に記載の光源ユニットを含むことを特徴とするディスプレイ。
- 請求項14または15に記載の光源ユニットを含むことを特徴とする照明装置。
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Also Published As
Publication number | Publication date |
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JPWO2017057287A1 (ja) | 2018-07-19 |
US10894375B2 (en) | 2021-01-19 |
KR102336862B1 (ko) | 2021-12-08 |
KR20180061165A (ko) | 2018-06-07 |
JP6760076B2 (ja) | 2020-09-23 |
TW201716233A (zh) | 2017-05-16 |
TWI761314B (zh) | 2022-04-21 |
CN108141939B (zh) | 2020-11-17 |
US20180274753A1 (en) | 2018-09-27 |
CN108141939A (zh) | 2018-06-08 |
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