WO2002061471A1 - Plaque guide optique et unite d'eclairage - Google Patents
Plaque guide optique et unite d'eclairage Download PDFInfo
- Publication number
- WO2002061471A1 WO2002061471A1 PCT/JP2002/000752 JP0200752W WO02061471A1 WO 2002061471 A1 WO2002061471 A1 WO 2002061471A1 JP 0200752 W JP0200752 W JP 0200752W WO 02061471 A1 WO02061471 A1 WO 02061471A1
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- WIPO (PCT)
- Prior art keywords
- layer
- light guide
- guide plate
- light
- oxide
- Prior art date
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Classifications
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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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
- G02B6/001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted along at least a portion of the lateral surface of the fibre
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
Definitions
- the present invention relates to a light guide plate used for a front light type lighting unit of a liquid crystal display device, and a front light type lighting unit for a liquid crystal display device using the light guide plate.
- a liquid crystal display device is composed of a transmissive liquid crystal display element and a back light type lighting unit (hereinafter abbreviated as BL unit) for illuminating the same, and a display screen of a personal computer and a liquid crystal display. It has become widespread as a display device for televisions and power systems.
- BL unit back light type lighting unit
- a light guide plate is used for the knock light type lighting unit.
- the back light unit irradiates the liquid crystal display panel with light from the back of the liquid crystal, and there has been a problem how to uniformly irradiate the liquid crystal with the light from the light source.
- transparent materials such as poly (methyl methacrylate) (PMMA), polycarbonate (PC), and polyester have been used as the material of the light guide plate.
- PMMA poly (methyl methacrylate)
- PC polycarbonate
- polyester polyester
- Japanese Patent Application Laid-Open No. 8-94852 discloses that a light-reflection treatment is applied to one side of a molded article made of a norbornene-based polymer for use in a knock light type unit. Light guide plates have been reported.
- the display screens described above have been designed to reduce the power consumption by using reflective liquid crystal display elements and front-light type lighting.
- Units (hereinafter abbreviated as FL units) are being installed as display devices.
- FL units a light guide plate for front light (for FL) is used.
- This FL light guide plate uniformly irradiates the liquid crystal surface with light from the light source on the side, and scatters the light reflected by the reflective surface of the liquid crystal display element. Two functions, that is, transmission without transmission, must be satisfied.
- the present invention has been made in view of the above situation, and has a light transmittance, heat resistance, transferability of fine irregularities, excellent adhesion and durability of a light reflection preventing layer, and a front light of a liquid crystal display device. It is an object of the present invention to provide a light guide plate for a lighting unit and a lighting unit using the light guide plate.
- the present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, as a material of the light guide plate, an alicyclic structure-containing polymer resin such as a norbornene-based polymer or a vinyl alicyclic hydrocarbon polymer was used.
- an alicyclic structure-containing polymer resin such as a norbornene-based polymer or a vinyl alicyclic hydrocarbon polymer was used.
- a front plate of a liquid crystal display device which is made of an alicyclic structure-containing polymer resin and has a fine uneven shape having a light reflecting function on at least one of its main surfaces.
- a light guide plate for a mold lighting unit will be provided.
- the light guide plate of the present invention is used for a front-light type lighting unit of a liquid crystal display device, and is installed on a liquid crystal display element and on the viewer side to transmit light from a light source. It has a function of taking in light from at least one side and emitting the light to the liquid crystal display element side, transmitting the light reflected by the liquid crystal display element and emitting the light to the viewer side. For this reason, the liquid crystal display element is of the reflection type (reflection type LCD).
- the light guide plate of the present invention is formed by molding an alicyclic structure-containing polymer resin.
- the alicyclic structure-containing polymer resin has an alicyclic structure in a repeating unit of the polymer, and has an alicyclic structure in any of the main chain and / or the side chain. You may.
- Examples of the alicyclic structure include a cycloalkane structure and a cycloalkene structure, and a cycloalkane structure is preferred from the viewpoint of transparency.
- the number of carbon atoms constituting the alicyclic structure is not particularly limited, but is usually in a range of 4 to 30, preferably 5 to 20, and more preferably 5 to 15. If there is, it is excellent in transparency.
- the proportion of the repeating unit having an alicyclic structure in the alicyclic structure-containing polymer may be appropriately selected according to the purpose of use, but is usually 50% by weight or more, preferably 70% by weight or more. And more preferably 90% by weight or more. If the proportion of the repeating unit having an alicyclic structure in the alicyclic structure-containing polymer is too small, transparency is undesirably reduced.
- the remainder other than the repeating unit having an alicyclic structure in the alicyclic structure-containing polymer is not particularly limited, and is appropriately selected depending on the purpose of use.
- Such a polymer resin having an alicyclic structure include (1) a norbornene-based polymer, (2) a monocyclic cyclic olefin polymer, and (3) a cyclic conjugated polymer. And (4) vinyl alicyclic hydrocarbon polymers, and hydrogenated products thereof.
- a norbornene-based polymer a monocyclic cyclic olefin polymer
- a cyclic conjugated polymer a cyclic conjugated polymer.
- vinyl alicyclic hydrocarbon polymers and hydrogenated products thereof.
- hydrogenated norbornene-based polymers vinyl alicyclic hydrocarbon polymers or hydrides thereof are preferable, and hydrogenated norbornene-based polymers are more preferable.
- the norbornene-based polymer used in the present invention is, for example, a known polymer disclosed in JP-A-3-14882 or JP-A-3-122137. Specifically, ring-opening polymers of norbornene-based monomers, ring-opening copolymers of norbornene-based monomers with other monomers capable of ring-opening copolymerization, and the like. And addition polymers of norbornene-based monomers and addition-type copolymers with other monomers copolymerizable with norbornene-based monomers. Of these, from the viewpoint of transparency, a hydrogenated ring-opened polymer of a norbornene-based monomer is most preferred.
- ring-opening polymer of these nonorebornane-based monomers or a ring-opening copolymer of a nonorebornane-based monomer with another monomer capable of ring-opening copolymerization opens the monomer component. It can be obtained by polymerization in the presence of a ring polymer catalyst.
- ring-opening polymerization catalysts include, for example, halides of metals such as norenium, rhodium, palladium, osmium, iridium, platinum, and the like.
- Consisting of a nitrate or acetylacetonate compound and a reducing agent A catalyst system or a catalyst system composed of a halogenated or acetylethylacetonate compound of a metal such as titanium, vanadium, zirconium, tandastane, or molybdenum, and an organic aluminum compound. Used.
- the polymerization reaction is carried out in a solvent or without a solvent, usually at a polymerization temperature of ⁇ 50 ° C. to 100 and a polymerization pressure of 0 to 50 kg Z cm 2 .
- Examples of other monomers capable of ring-opening copolymerization with norbornane-based monomers include, for example, cyclohexene and cyclohepte disclosed in JP-A-64-62616. And monocyclic cyclic olefin monomers such as cyclopentane and cyclooctane.
- a hydrogenated ring-opening polymer of a norbornane-based monomer can be usually obtained by adding a hydrogenation catalyst to a polymerization solution of the above-mentioned ring-opening polymer and hydrogenating it.
- the hydrogenation catalyst is not particularly limited, but usually, a heterogeneous catalyst or a homogeneous catalyst is used.
- Addition (co) polymers of nonolevonolene-based monomers or other monomers that can be copolymerized with norenobornene-based monomers include, for example, titration of a monomer component in a solvent or without solvent in the presence of titanium.
- the polymerization temperature is usually from 50 ° C to 100 ° C, from 0 to 50 kgZ It can be obtained by a method of (co) polymerization at a polymerization pressure of cm 2 .
- copolymerizable monomers include, for example, ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 3-methylen-1-butene, 3-methyl One-one-pentent, three—Echinore one-one-pentent,
- Non-conjugated gen; etc. are used.
- copolymerizable monomers can be used alone or in combination of two or more.
- copolymerization with the binding units derived from norbornene-based monomers in the addition copolymers is possible.
- the ratio with the other monomer-derived binding unit is usually 30:70 to 99: 1, preferably 50:50 to 97: 3, more preferably by weight. Or 70: 30 to 95: 5 as appropriate.
- Examples of the monocyclic cyclic olefin-based polymer include cyclohexene, cycloheptene, and cyclohexol disclosed in JP-A-64-62616.
- An addition polymer of a monocyclic cyclic olefin-based monomer such as ten can be used.
- Examples of the cyclic conjugated gen-based polymer include cyclopentagen disclosed in Japanese Patent Application Laid-Open No. 6-136570 and Japanese Patent Application Laid-Open No. 7-25831
- a polymer obtained by subjecting 1,2- or 1,4-addition polymerization of a cyclic conjugated monomer such as cyclohexadiene and its hydrogenated product can be used.
- the molecular weight of the norbornane-based polymer, monocyclic cyclic olefin-based polymer, or cyclic conjugated gen-based polymer used in the present invention is appropriately selected depending on the purpose of use.
- the gel permeation of a cyclohexane solution (toluene solution if the polymer resin does not dissolve) or polysoprene measured by the chromatographic method Polystyrene equivalent weight average molecule Amount, usually 5, 0 0 0-5 0 0, 0 0 0, preferably 8, 0 0 0 to 2 0 0, 0 0 0, more preferably 1 0, 0 0 0 to 1 0 0
- the ratio is in the range of 0.000 to 1000, the mechanical strength of the molded body and the moldability are preferably highly balanced.
- Examples of the alicyclic hydrocarbon polymer include vinyl alicyclic hydrocarbons such as vinylcyclohexene and vinylcyclohexane disclosed in JP-A-51-9989. Polymers of hydrogen monomers and hydrogenated products thereof, styrene disclosed in JP-A-63-43910, JP-A-64-17606 and the like, It is possible to use a hydrogenated product of the aromatic ring portion of a polymer of a vinyl aromatic monomer such as ⁇ -methylstyrene. In this case, a random copolymer or block copolymer of a vinyl alicyclic hydrocarbon polymer or a vinyl aromatic monomer and another monomer copolymerizable with these monomers.
- the block copolymer may be a copolymer such as a polymer or a hydrogenated product thereof.
- the block copolymer is not particularly limited, such as a diblock, a triblock, or a multiblock / gradient block copolymer of a higher degree.
- the molecular weight of the vinyl alicyclic hydrocarbon polymer used in the present invention is appropriately selected according to the purpose of use, but it may be a gel of a hexahedral hexane solution (a toluene solution if the polymer resin is not dissolved).
- Permeation The weight average molecular weight in terms of polyisoprene or polystyrene measured by the chromatographic method, usually 100,000 to 300,000, preferably 1,
- the mechanical strength of the molded body, when the value is in the range of 5, 000 to 2,500, 0000, and more preferably, in the range of 20, 000 to 200, 000. Workability is highly balanced.
- T g may be appropriately selected according to the purpose of use, but is usually at least 80 ° C, preferably from 100 ° C to 250 ° C, and more preferably 120 ° C. ° C to 200 ° C. Within this range, heat resistance and moldability are high. It is well balanced each time.
- stabilizers such as antioxidants, ultraviolet absorbers, weather stabilizers, light stabilizers, and heat stabilizers; organic fillers and the like may be used as necessary for the alicyclic structure-containing polymer resin.
- Fillers such as inorganic fillers; coloring agents such as dyes and pigments; additives such as near-infrared absorbing agents, plasticizers, lubricants, antistatic agents, flame retardants, resins and soft polymers can be blended. These additives can be used alone or in combination of two or more, and the amount of addition is appropriately selected within a range not to impair the object of the present invention.
- the light guide plate of the present invention can be obtained by molding the alicyclic structure-containing polymer resin.
- the light guide plate can be molded by any of a heat-melt molding method such as an injection molding method, an extrusion molding method, a press molding method, and a molding method using a solution such as a cast molding method.
- a heat-melt molding method such as an injection molding method, an extrusion molding method, a press molding method, and a molding method using a solution such as a cast molding method.
- the alicyclic structure-containing polymer resin used in the present invention is excellent in fluidity during heating and melting, particularly when the injection molding method and the press molding method are used, the fine particles are used. The transferability of the uneven shape is excellent and suitable.
- the amount of gas generated from the light guide plate per unit surface area of the light guide plate preferably 200 ⁇ g / m 2 or less, is properly preferred Ri good 1 5 0 ⁇ gm 2 or less, and most virtuous or municipal district is 1 0 0 ⁇ g Z ra 2 or less is the Son, and of the desired arbitrary.
- the gas generation amount of the light guide plate is within the above range, when an anti-reflection layer described later is formed on the light guide plate, the thickness unevenness of the entire layer becomes smaller and uniform. Further, such an effect is particularly remarkable when the antireflection layer is a sputtering film.
- the amount of gas generated from the light guide plate is determined by the dynamic, headspace, gas chromatograph, mass spectrometry (DHS-GC) method.
- the gas generated from the light guide plate is collected by a solid adsorbent, concentrated, and injected into the sample inlet of the DHS-GC-MS device.
- the light guide plate as described above can be obtained by combining the methods described below.
- reaction solution after the synthesis of the alicyclic structure-containing polymer resin is heated to a specific temperature or higher under reduced pressure (pressure lower than normal pressure), and the solvent and the volatilization contained in the alicyclic structure-containing polymer resin Use the method of evaporating and removing components (direct drying method).
- additive used for the purpose use an additive whose molecular weight is more than a specified value, and the amount of addition is not more than a specified amount.
- a molding material for example, a pellet-like material made of an alicyclic structure-containing polymer resin is heated and heated or depressurized.
- the heating temperature of the reaction solution in the direct drying method is in the range of 270 to 340 ° C, preferably 275 to 330 ° C. If the heating temperature is too low, the efficiency of removing low molecular weight components and residual solvent in the alicyclic structure-containing polymer resin will decrease, and if the heating temperature is too high, the resin may be decomposed by heat. Further, the pressure at the time of decompression is 26.7 kPa or less, preferably 13.4 kPa or less, more preferably 6.7 kPa or less.
- the content of the component having a molecular weight of 1,000 or less contained in the alicyclic structure-containing polymer resin it is preferable to reduce the content of the component having a molecular weight of 1,000 or less contained in the alicyclic structure-containing polymer resin, and it is preferable that the content is 2 weight%. % Or less, more preferably 1 weight. /.
- the content is more preferably 0.5% by weight or less.
- the component having a molecular weight of 1,000 or less is a component having a molecular weight of 1,000 or less remaining in the resin in the process of synthesizing the alicyclic structure-containing polymer resin. Specifically, 1) unreacted monomer components remaining when polymerizing resin, 2) oligomeric components (for example, those with a degree of polymerization of 10 or less), 3) low molecular weight polymer components, 4Moisture and organic solvents are mentioned. Of these components, the molecular weight of polymers and oligomers is usually calculated as polyisoprene by gel permeation chromatograph 1 and graphite 1 (GPC) using hexahexane as a solvent.
- GPC graphite 1
- Mw weight average molecular weight
- the light guide plate of the present invention needs to have a fine uneven shape having a light reflecting function on at least one surface, preferably one surface other than the side surface, and further, at least one surface, preferably other than the side surface.
- an anti-reflection layer is formed on one plane.
- the shape of the light guide plate is plate-like, and its size may be selected according to the screen size of the liquid crystal display element to be used, but usually, the width is 10 to 300 111 111, preferably 2 0 to 200 mm, more preferably 30 to: 150 mm, length 10 to 350 mm, preferably 30 to 250 mm, more preferably 40 2200 mm, thickness force SO.2 ⁇ : L 0 mm, preferably 0.5-5 mm, more preferably 0.8-3 mm.
- the light guide plate has a fine uneven shape having a light reflection function for emitting light from a light source taken in from one side toward a reflection type LCD (hereinafter abbreviated as LCD) on at least one main plane.
- LCD reflection type LCD
- the at least one main plane is preferably a plane other than a side surface, and more preferably a surface opposite to the surface facing LCD.
- the shape of the fine unevenness is not limited as long as it has a light reflecting function.
- a shape having a plurality of surfaces that reflect light from the one side surface (light incident surface) toward the LCD is preferable.
- a shape composed of a plurality of parallel V-shaped grooves and a continuous prism shape are preferable.
- the pitch of the V-grooves and prisms is 10 to 500 ⁇ , preferably 20 to 300 ⁇ , more preferably 50 to 200 ⁇ m, and the width is: ! ⁇ 2 5 0 ⁇ ⁇ , preferably 2: The 1 0 0 ⁇ ⁇ , more preferably 5 ⁇ 5 0 i m, depth:!
- the pitch is too narrow, the light reflected by the LCD will be less likely to pass through the light guide plate; The firing effect is reduced. If the width is too small or the depth is too shallow, the effect of reflecting the light from the light source is reduced.If the width is too large or the depth is too deep, the reflected light from the LCD is difficult to transmit. It becomes.
- the light guide plate of the present invention preferably has a light reflection preventing layer on at least one surface.
- the anti-reflection layer By having the anti-reflection layer, the light reflected in the minute concave and convex shape can be completely emitted to the LCD side, and the light reflected by the LCD can be transmitted through the light guide plate without any leakage. It is.
- the one surface is a plane other than the side surface and is a plane facing LCD, that is, a surface opposite to the surface having a fine shape.
- the light reflection preventing layer is not particularly limited as long as it has a function of preventing reflection of light such as visible light on a light incident surface, like the light reflection preventing layer of an optical component.
- the anti-reflection layer use a thin film of an inorganic compound used as an anti-reflection layer for optical components such as solar cells, optical sensors, lenses, and mirrors, or a film made of a transparent resin. Can be done.
- the antireflection layer made of the above-mentioned inorganic thin film has a property that the reflectance is low in a visible region of 400 to 700 nm.
- the antireflection layer may be used as a single layer, or may be used by laminating about two to six layers. The antireflection layer is appropriately selected depending on the application.
- Examples of the inorganic thin film include metal oxides, inorganic oxides, metal sulfides, and metal fluorides.
- the inorganic thin film has excellent adhesion to the light guide surface and is stable in air and water. This is preferred.
- metal oxides include aluminum oxide, bismuth oxide, cerium oxide, chromium oxide, europium oxide, iron oxide, ruthenium oxide, indium oxide, and lanthanum oxide. , Molybdenum oxide, magnesium oxide, neodymium oxide, lead oxide, praseodymium oxide, summer oxide, antimony oxide, scandium oxide, tin oxide, titanium oxide, titanium monoxide, Dititanium trioxide, tantalum oxide, tantalum oxide, yttrium oxide, zirconium oxide, zinc oxide, etc. It is. These oxides may be a mixture (for example, a mixture of indium oxide and tin oxide: ITO).
- oxides include silicon oxide and silicon monoxide.
- metal sulfide examples include zinc sulfide.
- metal fluorides include aluminum fluoride, barium fluoride, cerium fluoride, calcium fluoride, lanthanum fluoride, lithium fluoride, magnesium fluoride, and cryolia. , Thiolite, neodymium fluoride, sodium fluoride, lead fluoride, samarium fluoride, strontium fluoride, and the like.
- the inorganic thin film can be formed on the light incident surface by (1) a method such as vacuum evaporation, ion plating, or sputtering, and (2) a solution in which the above-mentioned inorganic compound is dispersed. A method of removing the solvent after coating, and (3) a method of bonding a finolem made of the above inorganic compound (either a single-layer finolem or a laminated finolem).
- the first layer (high-refractive-index layer), the second layer (low-refractive-index layer), the third layer (high-refractive-index layer), and the fourth layer (low-refractive-index layer) are alternately arranged in this order from the light guide plate surface side.
- Forming by vapor deposition, ion plating, or sputtering see Fig. 1
- low-refractive-index layer and “high-refractive-index layer” are defined as “layers composed of these layers” only if they have an antireflection function.
- Refractive index between "low refractive index layer” and “high refractive index layer” preferably has a refractive index of 1.6 among the above inorganic compounds.
- high refractive index layer an inorganic compound having a refractive index of 1.6 to 2.5, preferably 1.8 to 2.2 among the above inorganic compounds is used.
- each layer is 5 to 500 nm, preferably 10 to 300 nm in the case of the above (1), and by varying the thickness of each layer within this range.
- the reflectance and transmittance can be controlled.
- the alicyclic structure-containing polymer resin used is excellent in heat resistance, particularly when the method (1) is used, the fine concave shape is deformed by heat during film formation.
- the adhesiveness of the antireflection layer can be improved, which is preferable.
- the metal oxide having a high refractive index tantalum oxide, zirconium oxide, cerium oxide, diobium oxide, or a mixture thereof is used.
- the anti-reflection layer is excellent in (1) initial adhesion and (2) durability in high-temperature, low-temperature, high-humidity environments, and among others, tantalum oxide is most preferable. .
- a silicon monoxide oxidation degree changing layer S
- X is varied in the range of 1 to 2) or a layer of silicon dioxide is more preferably interposed between the first layer and the light guide plate surface (see FIG. 1). Since the antireflection effect (reflectance) of the antireflection layer is substantially determined by the multilayers sequentially stacked from the high refractive index layer closest to the light guide plate, the underlayer is a silicon monoxide oxidation degree changing layer. In some cases, the layer may be a layer of silicon dioxide, and may be a layer having a low refractive index, but substantially functions as a layer for improving the durability and adhesion of the multilayer.
- an underlayer (A) composed mainly of SiO x (1 ⁇ X ⁇ 2) is formed on at least one principal plane of the light guide plate, and then tantalum pentoxide is formed on the underlayer.
- the layer (B) the initial adhesion and durability of the antireflection layer are improved, which is preferable.
- the layer (A) has S i O x (1 ⁇ X ⁇ 2) as a main component. Specifically, the layer (A) has S i O 2 as a main component and S i O as a main component.
- the main component of the layer (A) is Siox (1 ⁇ x ⁇ 2), among which the main component is Siox (1 ⁇ x ⁇ 2). in this case, S i 0 2 as compared to the well for mainly improving Ri is good adhesion to, in the antireflection film is improved even reflection characteristics Ri by those based on S i O I like it.
- a vacuum evaporation method for forming the layer, a vacuum evaporation method, an ion plating method, a sputtering method, an ion beam assisted method, or the like is used. In general, a vacuum evaporation method is used.
- SiO and SiO x When forming SiO and SiO x, resistance heating or an electron gun is used as a heating source, and SiO is used as a deposition material. Perform 3 T orr about to introduce Shinano husk S i degree of oxidation of adjusting the (X) by the reactive deposition - 5 ⁇ 5 XI 0 - oxygen 8 XI 0 Cha down the bars at the time of evaporation.
- a general magnetron sputtering apparatus can be used, and either a DC power supply or an RF power supply can be used.
- the target can use S i O 2 or S i (Shi Li co down) when using the S i is, A r (argon) O 2 (oxygen) Cha the gas Nba one other gas Introduce within.
- the degree of oxidation of Si can be adjusted by controlling the amount of oxygen gas introduced, and the range of X of S i OX can be controlled to 1-2.
- the thickness of the layer (A) is usually from 10 to 500 nm, preferably from 30 to 300 nm, more preferably from 50 to 200 nm. Layer (A) is too thin If it is too thick, the adhesiveness of the multilayer film will be reduced, and if it is too thick, the optical properties of the multilayer film will be reduced.
- Layer (B) is composed mainly of pentoxide tantalum, favored properly is T a 2 ⁇ 5 5 0 wt% or more, good Ri favored properly 7 0 wt% or more, and most preferred properly 9 0% by weight or more is contained.
- T a 2 0 5 as main components layers must be transparent, because the content of T a 2 0 5 other components are favored small and this is arbitrary.
- Z r ⁇ 2, C e ⁇ 2, Y 2 ⁇ 3, T i 0 2, T i 3 0 5, S i O, N b 2 O 5 or the like I like it.
- a vacuum deposition method for forming the layer, a vacuum deposition method, an ion plating method, a sputtering method, an ion beam assisted method, or the like is used, and a vacuum deposition method is generally used.
- the evaporation source containing T a 2 0 5 Evaporation by electron gun or resistance heating or the like is deposited on the substrate surface.
- the conditions for vapor deposition are not particularly limited, and may be conditions used for general vacuum vapor deposition.
- Ri when evaporated as a T a 2 O 5 only evaporation source with an electron gun or resistance heating or the like, Ri if there where those having an oxygen atom deficient in T a 2 0 5 which evaporated occurs, The layer formed by evaporation may be colored and absorb light.
- evaporation time Cha Nba one in 2 XI by introducing oxygen into 0 - 5 ⁇ 5 X 1 0 - 3 Ri by the and this depositing at a pressure of about T orr, Ru can trigger reduce coloration.
- the thickness of the layer (B) is usually 5 to 500 nm, preferably 10 to 300 nm, more preferably 15 to 200 nm. If the layer (B) is too thin, the adhesion of the multilayer film is reduced, and if it is too thick, it becomes difficult to adjust the optical properties.
- the vapor deposition composition containing tantalum oxide as a main component is kept in a molten state for at least 10 minutes, then solidified, and then solidified.
- a vapor deposition method characterized by forming a layer (A) containing tantalum oxide as a main component on an adherend by a vacuum vapor deposition method using the composition thus formed is most preferable.
- the melting temperature is usually 1470 ° C or more, preferably 1500 ° C or more, and the upper limit is 20000 ° C.
- the holding time is 10 minutes or more, preferably 15 minutes or more, and the preferred upper limit varies depending on the temperature. If the melting temperature is too low or the holding time is too short, volatile components and the like in the composition cannot be completely removed, and if the melting temperature is too high or the holding time is too long, the components in the composition will decompose. In either case, the adhesion, durability, and optical performance of the deposited film are reduced. Therefore, when the melting temperature and the holding time are in the above ranges, the initial adhesion strength of the deposited film, the adhesion strength after the durability test, and the optical properties are improved.
- the holding in the molten state is preferably carried out in an atmosphere having a low oxygen concentration in order to suppress the decomposition of the composition, preferably at an oxygen concentration of 10% or less, more preferably at 8% or less. Is performed in an atmosphere of 5% or less.
- the pressure is preferably reduced to normal pressure or lower, more preferably 400 hPa or lower, more preferably 200 hpa or lower, and further preferably l Perform under OO h Pa.
- Heating and melting is preferably performed using a melting device having an electric heater and capable of reducing pressure.
- a melting device having an electric heater and capable of reducing pressure.
- Specific examples include an electric melting furnace and an electric heating crucible.
- the composition for vapor deposition may be heated and melted by an electron beam in a general device capable of reducing pressure, such as an autoclave.
- the content of tantalum oxide is preferably 90% by weight or more.
- the tantalum oxide is preferably tantalum pentoxide (Ta 2 O 5 ).
- the adhesion and durability of the deposited film are improved.
- the above composition is solidified and then pulverized for use.
- the average particle size of the crushed particles is preferably in the range of 0.5 to 1.7 ram.
- the range of the average particle diameter is in the above range, when the continuous vapor deposition reactor described later is used, there is no fluctuation in the supply speed of the automatic supply device that supplies the vapor deposition material composed of the composition to the heating crucible.
- the film thickness and optical characteristics of the deposited film are stabilized.
- the layer (A) mainly composed of SiO x (1 ⁇ x ⁇ 2) is formed on the surface of the light guide plate formed by molding the alicyclic structure-containing polymer resin by the above method.
- the method of forming the layer (B) containing tantalum pentoxide as a main component is effective not only for the light guide plate but also for the entire molded article formed by molding the alicyclic structure-containing polymer resin. That is, a layer (A) containing Sio x (1 ⁇ x ⁇ 2) as a main component is formed on the surface of a molded article obtained by molding an alicyclic structure-containing polymer resin by the above method.
- a laminate (laminate 1) having thereon a layer (B) containing tantalum pentoxide as a main component has an initial adhesiveness, durability, reflectance and transmittance of each layer.
- a laminate (laminate 1) having thereon a layer (B) containing tantalum pentoxide as a main component has an initial adhesiveness, durability, reflectance and transmittance of each layer.
- the layers (A) and (A) have excellent initial adhesion, durability, and optical performance such as reflectance and transmittance.
- the present invention is not limited to the light guide plate for a front light of the present invention, but includes a lens, a prism, and a light source. Office click, optical Filters, beam splitters, mirrors, light guide plates for back light, liquid crystal substrates, polarizing films, phase difference films, anti-reflection films (AR films), transparent conductive films It can be used as optical components such as films and transparent conductive sheets.
- the above laminated body is not limited to optical components, but is used for packaging films such as wrap-in holorem, stretch fin olem, shrink fin olem, gas-no-life considerable, etc .: press-through package sheet, Li scan Tano ⁇ 0 Tsu Kejishi door of any package sheet for; Shirubedenfu Lee Noremu, insulation, off Lee Noremu, Ru can also be used, such as in full gravel reluctant circuit for electrical and electronic components off i Lum, such as a substrate.
- a layer (A) mainly composed of SiO x (1 ⁇ x ⁇ 2) was provided on the metal reflection film of the alicyclic structure-containing polymer resin molded article having a metal reflection film.
- a laminate characterized by having a layer (B) containing tantalum pentoxide as a main component thereon can also be suitably used for some of the above-mentioned various uses.
- the gas generation amount per unit surface area when it is made of an alicyclic structure-containing polymer resin and held at 90 ° C. for 1 hour is 200 ⁇ g / m 2 or less.
- each layer is excellent in initial adhesion, durability, and optical performance such as reflectance and transmittance.
- one or more layers of an inorganic compound layer and / or an organic compound layer on the layer (B) these layers including the layer (A) and the layer (B) are formed. It is also excellent in initial adhesion, durability and optical performance such as reflectance and transmittance of the multilayer.
- This technique is also effective not only for the light guide plate but also for all molded articles formed by molding the alicyclic structure-containing polymer resin.
- it is made of an alicyclic structure-containing polymer resin, and the amount of gas generated per unit surface area when held at 90 ° C. for 1 hour is 200 ⁇ g / m 2 or less.
- the optical laminate (laminate 2), in which a sputtering ring film is formed on the surface of the molded product, is excellent in initial adhesion, durability, and optical performance such as reflectance and transmittance of each layer.
- these layers including the layer (A) and the layer (B) may be formed.
- Many It also excels in initial adhesion of the layer, durability, and optical performance such as reflectance and transmittance.
- the above-mentioned sputtering film is also suitable as an antireflection film, a wavelength selective transmission film, a polarizing film, a reflection film, a conductive film, and the like.
- the present invention can be suitably used not only for the light guide plate for light but also for the same use as the use of the laminate 1 described above.
- the above-mentioned notching film has an average film thickness of preferably 50 to 1,000 nm, more preferably 75 to 75 nm, and the average film thickness has a flatness.
- the width is less than ⁇ 5%, more preferably less than ⁇ 4% of the average film thickness.
- Such a snorting film is also suitable as the antireflection layer of the light guide plate of the present invention.
- the kind of the inorganic compound serving as a component of the sputtering film is the same as the component of the antireflection layer of the light guide plate of the present invention.
- a commonly used sputtering method can be used as a method for the spotting. Specifically, a plasma method such as two-pole sputter, three-pole or four-pole sputter, or a magnetron notter, and ion beam snow.
- the power source may be any one of a DC power source, an RF power source, and a microwave power source, such as a beam source such as a radiator or an ECR sputter. '
- the target material to be used can be appropriately selected according to the type of the film, the purpose of use, and the like.
- a high-frequency sputtering apparatus of an RF power source is used using a target of metal oxide or silicon oxide (for example, SiO 2 ).
- Reactive spotting is characterized by the formation of a film while the target material is denatured by a reaction during sputtering, and the denaturation reaction is generally an oxidation reaction or a nitridation reaction. It is a target.
- the target Using metal such as tantalum (T a) and titanium (T i) or silicon (S i) for the nozzle, oxygen gas and nitrogen gas are introduced into the chamber during the sputtering reaction. It is characterized in that a film is formed while changing the material to an oxide or a nitride. Oxygen and nitrogen can be introduced into the chamber by adding a certain amount to an inert gas such as argon gas.
- a magnetron sputtering method using a DC power supply is preferably used.
- a single-layer film may be formed by the above method, but in order to obtain a film having better optical performance, two or more films having different components and compositions are laminated. It is more preferable to alternately laminate films having different refractive indexes.
- the film can be laminated in about 10 to 20 layers.
- the average thickness of the sputtered film obtained by the above method is 50 to: I, 000 nm, preferably 75 to 750 nm in total. It is also suitable as an antireflection layer for a light plate.
- the front light type lighting unit of the present invention has a light source and a light guide plate, and the light source is a linear light source, and is located near at least one side surface of the light guide plate. Is preferred.
- the distance between the light source and the light incident surface is usually 0.01 to 5 mm, preferably 0.05 to 2 mm, and more preferably 0.1 to 1 mm. If the distance between the light source and the light incident surface is too long, light incident on the light guide plate will be lost, and the light emission luminance of the lighting unit will be reduced. Conversely, if the distance between the light source and the light incident surface is too short, the light incident surface of the light guide plate will be deformed or colored by the heat of the light source.
- the linear light source may not be linear, may be L-shaped, or may have a U-shape.
- the light incident surfaces are two and three, respectively.
- the light source used in the lighting device of the present invention may be any light source that can emit visible light, and includes an incandescent lamp, a fluorescent discharge tube, a light emitting diode (LED), and the like.
- a fluorescent light emitting element (EL element) can be used, but a fluorescent discharge tube and an LED are preferred from the viewpoints of luminance, color temperature, low heat generation, and low ultraviolet irradiation. Further, among the fluorescent discharge tubes, a cold cathode fluorescent discharge tube is more preferable.
- the fluorescent material absorbs and excites ultraviolet light emitted inside the tube, and emits visible light.
- This ultraviolet light has a strong absorption at specific wavelengths (254 nm and 313 nm).
- T g was measured by a differential scanning calorimeter (DSC method).
- the molecular weight was measured as a polyisoprene conversion value measured by gel permeation chromatography (GPC) using cyclohexane as a solvent.
- a substrate (light guide plate) with an anti-reflection layer deposited thereon was left at room temperature for at least 1 hour to obtain a test piece.
- the durability of the anti-reflection layer is the same as that of the test piece for which the initial adhesion was evaluated in (3) above. After each standing, evaluation was made by measuring the adhesion of the anti-reflection layer by a cross-cut peeling test in the same manner as in (3) above.
- the light transmittance of the light guide plate was measured at an incident angle of 0 ° using a spectrophotometer U400 manufactured by Hitachi, Ltd. At the same time, the reflectance of the anti-reflection layer was set to an incident angle of 1 2. Was measured. The above measurement was carried out using a light beam having a wavelength of 450 to 650 nm, and evaluated according to the following criteria.
- the transferability of the fine 0P convex shape was evaluated by the following method.
- the transferability of the V-groove for light reflection formed on the light guide plate was measured using Formari Surf (manufactured by Teller Hobson).
- H V-groove height of the mold as the reference
- D V-groove depth of the light guide plate at the same location, and evaluate it according to the following criteria based on the value of (D / H) XI00. did.
- reaction solution containing the ring-opening polymer 270 parts of a hexahedral hexane was applied, and nickel aluminum was further used as a hydrogenation catalyst.
- Na catalyst Nikki chemical Co., Ltd.
- 5 parts were added, after pressurizing to while stirring was warmed to al temperature 2 0 0 ° C by Ri to 5 0 kg / cm 2 hydrogen, then 4 hours reaction
- a reaction solution containing 20% of a hydrogenated ETDZDCP ring-opening polymer was obtained.
- ETDZDCP 15/85 when the copolymerization ratio of each norbornene in the polymer was calculated from the composition of residual norbornenes in the solution after polymerization (by gas chromatography).
- the composition was almost equal to the charge composition.
- the weight of the hydrogenated ETD / DCP ring-opening polymer The weight average molecular weight (M w) was 31.000, the degree of hydrogenation was 99.9%, and the T g was 100 ° C.
- the reaction solution was filtered to remove the hydrogenation catalyst, and 800 parts of cyclohexane was added to dilute the reaction solution, and the reaction solution was diluted with 350 parts of isopropanol (cl Into a clean room with a filter of pore size ⁇ ) to precipitate the block copolymer, which was separated and recovered by filtration. It was dried under reduced pressure at 48 ° C. for 48 hours.
- the obtained block copolymer is composed of a block containing a repeating unit derived from styrene (hereinafter abbreviated as St) and a block containing a repeating unit derived from styrene and isoprene.
- the block copolymer had Mw of 85100, Mw / Mn of 1.17, a hydrogenation ratio of the main chain and aromatic ring of 99.9%, and a Tg of 1266.5. ° C.
- the above pellets were preheated and dried at 80 ° C for 4 hours, and then subjected to injection molding using an injection molding machine (product number: ⁇ -100B manufactured by FANUC CORPORATION). As a result, a light guide plate having a thickness of l mm and a thickness of 2 inches was formed. Molding conditions are 70 mold temperature. C, the temperature of the cylinder was set at 270 ° C. The light guide On one plane of the plate, V-shaped short-side grooves with a width of 10 ⁇ and a depth of 10 / zm were formed at intervals of 160 ⁇ m in parallel with the long side.
- a light reflection preventing layer having a four-layer structure was formed by vacuum evaporation.
- the film configuration is as follows.
- oxide Kei element (S i ⁇ 2) layer (. 0 0 7 ⁇ 0)
- ⁇ . Is the wavelength at which the reflectance is desired to be minimized in the operating wavelength range.
- the deposition conditions for each layer were as follows.
- fourth layer 5 X 1 0 - 5 torr , 5 Ongusu preparative ROHM Z sec first
- third layer 0 8 ⁇ :.. 1 X 1 0 - 4 torr, 0 5 ⁇ 2 on-Gus DOO Mouth ' ⁇ mu / sec
- the deposition temperature was about 40 ° C.
- Example 1 was repeated except that the polymer obtained in Production Example 23 was used in place of the polymer obtained in Production Example 1 and the cylinder temperature during injection molding was changed to 280 ° C. A pellet was manufactured in the same manner as described above, and then a light guide plate was formed, and a light reflection preventing layer was formed. The results are shown in Table 1.
- Example 1 An acrylic resin (Delpet 80 NH, manufactured by Asahi Kasei) was used in place of the polymer pellets produced in Example 1, and the cylinder temperature during injection molding was reduced to 2%.
- a light guide plate was formed in the same manner as in Example 1 except that the temperature was changed to 70 ° C., and a light reflection preventing layer was formed. The results are shown in Table 1.
- Example 2 a polycarbonate resin (Panlite ML-110, manufactured by Tijin) was used, and the cylinder temperature during injection molding was set at 280 ° C. A light guide plate was formed in the same manner as in Example 1 except that the temperature was changed to ° C, and an antireflection layer was formed. The results are shown in Table 1. Industrial applicability
- the initial adhesiveness of an anti-reflection layer and the adhesiveness after endurance tests, such as high temperature, low temperature, and high humidity, are excellent in the transferability of a fine uneven
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Liquid Crystal (AREA)
- Surface Treatment Of Optical Elements (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2003-7008436A KR20030075153A (ko) | 2001-01-31 | 2002-01-31 | 도광판 및 조명유닛 |
US10/466,554 US20040114067A1 (en) | 2001-01-31 | 2002-01-31 | Lightguide plate and lighting unit |
EP02711249A EP1357405A4 (en) | 2001-01-31 | 2002-01-31 | LIGHTING PLATE AND LIGHTING UNIT |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001-024225 | 2001-01-31 | ||
JP2001024225A JP2002228845A (ja) | 2001-01-31 | 2001-01-31 | 導光板 |
JP2001-129426 | 2001-04-26 | ||
JP2001129426A JP2002321302A (ja) | 2001-04-26 | 2001-04-26 | 脂環式構造含有重合体樹脂積層体 |
JP2001138015A JP2002331613A (ja) | 2001-05-08 | 2001-05-08 | 脂環式構造含有重合体樹脂積層体 |
JP2001-138015 | 2001-05-08 | ||
JP2001199739A JP4328937B2 (ja) | 2001-06-29 | 2001-06-29 | 蒸着方法 |
JP2001-199739 | 2001-06-29 |
Publications (1)
Publication Number | Publication Date |
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WO2002061471A1 true WO2002061471A1 (fr) | 2002-08-08 |
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ID=27482015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/000752 WO2002061471A1 (fr) | 2001-01-31 | 2002-01-31 | Plaque guide optique et unite d'eclairage |
Country Status (5)
Country | Link |
---|---|
US (1) | US20040114067A1 (ja) |
EP (1) | EP1357405A4 (ja) |
KR (1) | KR20030075153A (ja) |
CN (1) | CN1220076C (ja) |
WO (1) | WO2002061471A1 (ja) |
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CN114845861B (zh) * | 2019-12-18 | 2024-03-15 | Agc株式会社 | 带有多层膜的透明基体 |
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Also Published As
Publication number | Publication date |
---|---|
CN1489711A (zh) | 2004-04-14 |
CN1220076C (zh) | 2005-09-21 |
EP1357405A1 (en) | 2003-10-29 |
US20040114067A1 (en) | 2004-06-17 |
KR20030075153A (ko) | 2003-09-22 |
EP1357405A4 (en) | 2007-08-22 |
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