WO2007148508A1 - 光線反射用多層シート、これを用いた反射器、照明装置及び液晶表示装置 - Google Patents
光線反射用多層シート、これを用いた反射器、照明装置及び液晶表示装置 Download PDFInfo
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- WO2007148508A1 WO2007148508A1 PCT/JP2007/060622 JP2007060622W WO2007148508A1 WO 2007148508 A1 WO2007148508 A1 WO 2007148508A1 JP 2007060622 W JP2007060622 W JP 2007060622W WO 2007148508 A1 WO2007148508 A1 WO 2007148508A1
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- light
- reflector
- layer
- multilayer sheet
- resin
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/0816—Multilayer mirrors, i.e. having two or more reflecting layers
- G02B5/0825—Multilayer mirrors, i.e. having two or more reflecting layers the reflecting layers comprising dielectric materials only
- G02B5/0841—Multilayer mirrors, i.e. having two or more reflecting layers the reflecting layers comprising dielectric materials only comprising organic materials, e.g. polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00605—Production of reflex reflectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—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
- G02B6/0011—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
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/106—Carbon fibres, e.g. graphite fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/102—Oxide or hydroxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/104—Oxysalt, e.g. carbonate, sulfate, phosphate or nitrate particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2264/107—Ceramic
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/0264—Polyester
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/416—Reflective
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- B32—LAYERED PRODUCTS
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- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/514—Oriented
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/71—Resistive to light or to UV
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
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- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/202—LCD, i.e. liquid crystal displays
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
Definitions
- the present invention relates to a multilayer sheet for reflecting light used for manufacturing a reflector constituting an illuminating device used in a liquid crystal display device, a reflector using the same, an illuminating device, and a liquid crystal display device.
- a liquid crystal display device is composed of a lighting device and a liquid crystal panel, and the lighting device includes a sheet metal back chassis and a front chassis, a light source support, a light source, a light diffusion plate and a Z or light guide plate, an inverter, and the like. It is composed of a backlight that also has a driving circuit power.
- each of these conventional liquid crystal display devices and lighting devices has a problem in that it has a large number of parts and therefore many assembly processes.
- the above backlights are roughly classified into three types: a direct type, a light guide type, and a tandem type that is a hybrid of both.
- a direct type a direct type
- a light guide type a tandem type that is a hybrid of both.
- knocklights used in large-screen LCD television sets are required to have high brightness, so the development of direct type and tandem type has become active in recent years!
- a conventional direct type backlight has a flat or corrugated reflector formed by bonding and laminating a resin foam to an aluminum sheet metal base, a plurality of light sources, a light source support, a light diffusion plate, It is composed of an optical film and a sheet metal casing (back chassis, front chassis) (see, for example, Patent Documents 1 to 5).
- a conventional tandem (hybrid) type backlight has a reflecting plate or a plurality of reflecting sheets in which a resin foam is bonded and laminated to an aluminum sheet metal base, a plurality of light sources, a light source support, a light diffusion plate, a plurality of light guide plates, a plurality
- the optical film and sheet metal casing (back chassis, front chassis) force are also configured (see, for example, Patent Documents 6 to 8).
- the liquid crystal display device is configured by laminating a liquid crystal panel on the backlight.
- the above-mentioned reflector constituting the backlight is a reflector obtained by adhering and laminating a resin foam to an aluminum sheet metal base for the purpose of warping, deformation and maintaining the structure of the reflector. Plate-like press work and bending work for side surface formation are applied.
- the thickness of the chassis is also made of aluminum sheet metal with a 22-inch screen, a thickness of lmm, a 30-inch screen, a thickness of 1.5 mm, a 40-inch screen, and a thickness of 2 mm. Thickness has been used and the thickness has been increased, and an increase in weight cannot be avoided (see, for example, Patent Documents 9 to 15).
- Patent Document 1 Japanese Patent Application Laid-Open No. 2004-22352,
- Patent Document 2 Japanese Unexamined Patent Application Publication No. 2004-127643
- Patent Document 3 Japanese Patent Laid-Open No. 2001-215497
- Patent Document 4 Japanese Patent Laid-Open No. 2001-13880
- Patent Document 5 Japanese Patent Laid-Open No. 2001-22285
- Patent Document 6 Japanese Unexamined Patent Application Publication No. 2003-346537
- Patent Document 7 Japanese Patent Laid-Open No. 2002-72204
- Patent Document 8 Japanese Unexamined Patent Application Publication No. 2002-7503
- Patent Document 9 Japanese Unexamined Patent Application Publication No. 2004-55182
- Patent Document 12 JP 2004-47151 A
- Patent Document 13 JP 2004-55524 JP
- Patent Document 19 JP 2001-216807 A
- Patent Document 20 Japanese Unexamined Patent Application Publication No. 2003-234012
- the present invention has been made to solve the above-described problems, and can reduce the number of parts of the lighting device and the assembly process, thereby forming a reflector that is lightweight and thin. It is an object of the present invention to provide a multilayer sheet for reflecting light, a reflector using the same, an illumination device including the reflector, and a liquid crystal display device including the illumination device.
- the inventors of the present invention have made extensive studies to solve the above problems.
- the light-reflective resin layer (A) and a resin base layer (B) containing an inorganic filler of 30% by mass or more and having a flexural modulus of 5 GPa or more are used. It was found that the above-mentioned problems can be solved by using a multilayer sheet and a multilayer sheet for light reflection in which a flexible resin layer (C) is laminated on the resin base material layer (B) side.
- the present invention has been completed based on the above.
- the present invention provides: (1) For light reflection composed of a light-reflective resin layer (A) and a resin base material layer (B) containing 30% by mass or more of an inorganic filler and having a flexural modulus of 5 GPa or more Multi-layer sheet.
- the light-reflective resin layer (A) is made of a polycarbonate-based resin composition containing 20 to 60% by mass of titanium oxide titanium, or is a thermoplastic resin porous reflective film or sheet.
- the multilayer sheet for light reflection according to any one of (1) to (5) above,
- the inorganic filler contained in the resin base layer (B) contains talc, my strength, wollastonite, kaolin, calcium carbonate, acid aluminum, graphite, boron nitride, titanium oxide, glass
- the light-reflective resin layer (A) has a thickness of 0.1 to 2 mm
- the resin base layer (B) has a thickness of 0.3 to 1 mm
- the flexible resin layer (C) has a thickness of The multilayer sheet for light reflection according to any one of the above (1) to (7), which is in the range of 0.1 to 0.5 mm,
- a reflector comprising the multilayer sheet for reflecting light according to any one of (1) to (8) above,
- At least the reflector, the boss for mounting the circuit, the reinforcing rib, the light diffusing plate support frame, and if necessary, the lamp holder, the lamp supporter, and the light diffusing plate supporting column are integrally formed ( 9) the reflector according to
- a lighting device comprising the reflector according to (9) or (10) above,
- a liquid crystal display device comprising the illumination device according to (12) above, It is.
- a multilayer sheet for reflecting light for forming a reflector that can reduce the number of parts of an illuminating device and reduce the assembly process, and is lightweight and thin, and reflection using the same ,
- a lighting device including the reflector, and a liquid crystal display device including the lighting device can be provided.
- FIG. 1 is a cross-sectional view showing an example of a light guide type backlight using a reflector made of a multilayer sheet for reflecting light according to the present invention.
- FIG. 2 is a cross-sectional view showing an example of a linear light source direct type backlight using a reflector for a linear light source direct type backlight having a corrugated reflector made of a multilayer sheet for reflecting light according to the present invention. It is.
- FIG. 3 shows an example of a backlight directly under a point light source using a reflector for a backlight directly below the point light source having a plurality of parabolic cross-section arrays on the bottom surface of the reflecting surface made of the multilayer sheet for reflecting light according to the present invention. It is sectional drawing.
- FIG. 4 is a diagram showing an example of a point light source direct-type backlight reflector used in FIG. 3, which has a plurality of parabolic cross-section arrays on the bottom surface of the reflecting surface made of the multilayer sheet for reflecting light of the present invention. .
- FIG. 5 is a cross-sectional view of a reflector for a backlight directly below a point light source having a plurality of parabolic cross-section arrays on the bottom surface of the reflecting surface shown in FIG.
- the present invention relates to a multilayer sheet for reflecting light used for manufacturing a reflector constituting a lighting device (backlight) used in a liquid crystal display device, a reflector using the same, a lighting device equipped with the reflector, and the lighting A liquid crystal display device including the device.
- the multilayer sheet for light reflection of the present invention comprises at least a light-reflective resin layer (A) and a resin base material layer containing at least 30% by mass of an inorganic filler and having a flexural modulus of 5 GPa or more ( B).
- the rigidity of the reflector and reflector obtained by molding the multilayer sheet is improved, and the twisting of the reflector, which is a problem in a backlight for a large screen size, is suppressed.
- thin wall and light weight can be achieved.
- the light-reflective resin layer (A) includes (i) a porous stretched reflective sheet, (ii) a supercritical foam reflective sheet, and (iii) 1/4 ⁇ -thickness of different types of resin having different refractive indexes.
- a multilayer sheet in which several hundred layers are laminated and (iv) a reflective sheet made of a titanium oxide-containing thermoplastic resin composition can be suitably used.
- (i) includes, for example, white polyethylene terephthalate (PET) films such as E6SV and E60L manufactured by Toray Industries, Inc., and porous stretched films made of polypropylene (PP) such as white reflex stars manufactured by Mitsui Chemicals, Inc.
- PET white polyethylene terephthalate
- PP porous stretched films made of polypropylene
- an ultrafine foamed light reflecting plate MCPET registered trademark obtained by foaming a polyester film manufactured by Furukawa Electric Co., Ltd. with a supercritical gas to an average particle size of 20 ⁇ m or less can be used.
- (Iii) includes an ESR reflective sheet manufactured by Sumitomo 3M Limited.
- Examples of (iv) include a polycarbonate resin composition in which 30-60% by mass of acid titanium is blended with polycarbonate resin.
- the thickness of the light-reflective resin layer (A) is preferably from 0.1 to 2 mm.
- the Y value of the reflected light of the light-reflective resin layer (A) constituting the light-reflective multilayer sheet of the present invention is preferably 95 or more, more preferably 98 or more, and even more preferably 99 or more.
- the total light transmittance is preferably 0.5% or less, more preferably 0.2% or less, and even more preferably 0.1% or less. There is no particular restriction on setting a large Y value. Setting the Y value as large as possible improves the practical luminance characteristics of a light reflector.
- the resin composition for the light-reflective resin layer used for forming the light-reflective resin layer (A) is not particularly limited.
- a polycarbonate resin can be used as a polymer blend.
- a matrix resin component 0.1 to 5 parts by mass of organopolysiloxane per 100 parts by mass of a polycarbonate resin composition containing 8 to 50% by mass of titanium oxide.
- a flame retardant A polycarbonate resin composition containing a total of 0.1 to 5 parts by mass of a flame retardant aid is preferred.
- a light-reflective resin sheet excellent in reflectance, light-shielding property, and light resistance can be obtained.
- the titanium oxide content is less than 8% by mass, the light shielding properties and reflectivity are insufficient. If it exceeds 50% by mass, it will be difficult to add it to the polycarbonate resin.
- the organopolysiloxane for example, a silicone compound in which an alkoxy group such as methoxy group or ethoxy group is introduced into the silicone compound (organosiloxane, etc.) is preferable.
- Known flame retardants such as phosphate ester compounds and organopolysiloxane compounds can be used.
- Teflon (registered trademark) rosin can be used as an anti-dripping agent.
- the total amount of the flame retardant and the flame retardant auxiliary is 0.1 to 5 parts by mass per 100 parts by mass of the polycarbonate resin composition containing 8 to 50% by mass of titanium oxide. When the amount is less than 1 part by mass, flame retardancy is not exhibited. When the amount exceeds 5 parts by mass, the glass transition temperature is excessively lowered due to the plasticity effect, and heat resistance is impaired. Preferably, it is 1 to 4 parts by mass.
- the resin base layer (B) having a flexural modulus of 5 GPa or more is a high-rigidity layer or a high-rigidity high heat transfer. It has a function as a conductive layer.
- the resin base layer (B) is not particularly limited as long as the torsion of the obtained reflector can be suppressed. From the thermoplastic resin composition having moldability, heat resistance, flame retardancy, and high elastic modulus.
- the rosin base material layer is preferred! / ⁇ .
- thermoplastic resin composition a polycarbonate-based resin composition containing at least 5 parts by mass of powdered inorganic filler or reinforcing fiber and, if necessary, a flame retardant, per 100 parts by mass of thermoplastic resin.
- thermoplastic resin PBT resin, PET resin, polyethersulfone resin, etc.
- Thermoplastic resin with a heat distortion temperature of 120 ° C or higher, or a polymer blend containing two or more of these resins, and a matrix resin Compositions are preferred.
- the thickness of the resin base material layer (B) is preferably about 0.3 to 1 mm, although it depends on the flexural modulus of the layer to be formed.
- the flexural modulus of the resin base layer (B) (high rigidity resin layer) is 5 GPa or more.
- the flexural modulus is preferably 7 GPa or more, more preferably lOGPa or more, and further preferably 15 GPa or more.
- Glass fiber, carbon fiber and other reinforcing fibers are preferred. When used in combination, it is preferable to limit the amount of reinforcing fiber to 10% by mass in the composition.
- the total blending amount of these is preferably about 80 to 40% by volume of the resin matrix. Power depending on the specific gravity of the blend
- the blending amount of the powdered inorganic filler is preferably 20 to 60% by mass. If it is less than 20% by mass, a sufficient flexural modulus cannot be obtained, and the reflector tends to stagnate. If it exceeds 60% by mass, the extrudability is extremely reduced, and sheet molding becomes impossible. It becomes difficult.
- the flexural modulus of a polycarbonate resin composition containing 40% by mass of talc and 20% by mass of My strength can ensure lOGPa or more.
- the thermal conductivity of the resin base material layer (B) can be improved as a secondary matter.
- inorganic filler refers to inorganic fillers such as talc, my strength, wollastonite, kaolin and calcium carbonate, and reinforcing fibers such as glass fiber and carbon fiber, and includes two or more of these. Characterize
- the thermal conductivity of the resin base material layer (B) of the present invention is preferably 1WZm '° C or more.
- the thickness of the light-reflective multilayer sheet of the present invention composed of the light-reflective resin layer (A) and the resin substrate layer (B) is preferably 0.5 to 3 mm.
- the thickness is less than 5 mm, even if the resin base layer (B) is provided, the reflector is insufficient in rigidity and it is difficult to maintain the light shielding property. If it exceeds 3 mm, the rigidity and optical properties (reflection, light shielding) are sufficient, but if the weight increases, difficulties arise.
- the multilayer sheet for light reflection of the present invention further comprises a flexible resin layer (C) having a tensile elongation of at least 30% on the resin substrate layer (B) side. Install so that I (B) I (C) And are preferred.
- a flexible resin layer (C) with a tensile elongation of 30% or more, folding workability and hinge characteristics can be imparted.
- Sarakuko can reinforce the corners of the reflector and the ribs and other parts that tend to cause stress concentration.
- the tensile elongation is preferably 50% or more, more preferably 100% or more.
- the three-layer structure including at least the light-reflective resin layer (A), the resin base layer (B), and the flexible resin layer (C) is required for the multilayer sheet for light reflection.
- the strength can be improved.
- the flexible resin layer (C) suppresses brittleness derived from the resin base material layer (B) at the edge portion, ribs and bent portions of the reflector when the reflector is molded. It is possible to expand the flexibility of moldability and shape.
- the flexible resin layer (C) is not particularly limited as long as it is a resin that exhibits ductility at room temperature, which is a measure of flexibility.
- a polycarbonate resin composition containing an additive such as an inorganic filler of less than part by mass, or a dye, pigment, and optionally a flame retardant is preferred.
- an additive such as an inorganic filler of less than part by mass, or a dye, pigment, and optionally a flame retardant
- a resin composition in which less than 5 parts by mass of carbon black is mixed with polycarbonate resin is preferable because not only flexibility but also light-shielding properties can be imparted simultaneously.
- the light-reflective resin layer (A), the resin base layer (B), and the flexible resin layer (C) each of the three-layered multilayer sheet is made of a light-reflective resin layer (A) Is preferably 0.1 to 2 mm, the resin base layer (B) is 0.3 to Lmm, and the flexible resin layer (C) is preferably 0.1 to 0.5 mm.
- the reflector of the present invention is a reflector formed by using the multilayer sheet for reflecting light according to any one of the above (1) to (8).
- a layer structure for the multilayer sheet used for the formation of the reflector it is possible to obtain a large reflector with high brightness and light weight with reduced stagnation.
- Such a reflector is obtained by forming by a conventional thermoforming method (vacuum pressure air forming method), compression molding method and Z or bending process using a multilayer sheet for reflecting light. be able to.
- the present invention also provides at least a reflector, a boss part for circuit attachment, a reinforcing rib part, a light diffusion plate support frame, and, if necessary, a lamp holder, a lamp supporter, and a light diffusion plate support according to the present invention.
- an illuminating device provided with a light guide plate and a light source to which a reflector with an integrated column is attached.
- a light source is arranged on the thick part of the light guide plate to constitute an illumination device composed of an edge-type surface light source body such as a liquid crystal television, a personal computer, or a display.
- a backlight method or a front light method can be employed.
- the light source a plurality of light sources are used according to the display screen size of the liquid crystal display device and the required luminance of the illumination device.
- a linear or U-shaped cold cathode fluorescent lamp (CCFL), a point light source such as an optical semiconductor element (LED), or a linear or planar arrangement of these is used.
- the light source support an injection molded body of a thermoplastic resin composition that is not made of sheet metal is often used.
- the polycarbonate resin composition containing titanium oxide has a light reflecting function, and a structure in which a rib structure is formed in addition to the light source supporting function is adopted in order to improve the torsional rigidity of the reflecting plate.
- the light diffusing plate is usually made of polyacrylic acid, polymethyl methacrylate (PMMA), polyacrylo-tolyl, ethyl acrylate-acrylic acid 2-chloroethyl acrylate copolymer, acrylic acid n-butyl acrylonitrile copolymer Polymers, acrylonitrile styrene copolymers, acrylonitrile-butadiene copolymers, acrylonitrile-butadiene-styrene copolymers and other transparent resins such as acrylate resins, polycarbonate resins, and more recently cyclic olefin fin resins have light diffusing agents.
- the blended rosin composition is used, the thickness is about 1 to 3 mm, and it is selected according to the liquid crystal display screen size and the lighting system.
- Optical films having a plurality of functions are laminated. Usually, it is a light diffusion film used to make the surface brightness of the lighting device uniform, a prism sheet having a brightness enhancement function, or the like. A plurality of these are used by being laminated in accordance with adjustment of luminance and luminance uniformity.
- the light guide plate is usually polyacrylic acid, polymethyl methacrylate (PMMA), polyacrylo-tolyl, ethyl acrylate-acrylic acid 2-chloroethyl acrylate copolymer, n-butyl acrylate —Acrylic resin such as acrylonitrile copolymer, acrylonitrile styrene copolymer, acrylonitrile butadiene copolymer, acrylonitrile butadiene styrene copolymer, etc. has high light-guiding properties such as polycarbonate resin, and recently, cyclic olefin fin resin. Transparent resin is used, and it is selected according to the usage environment and screen size.
- PMMA polymethyl methacrylate
- Polyacrylo-tolyl ethyl acrylate-acrylic acid 2-chloroethyl acrylate copolymer
- n-butyl acrylate —Acrylic resin such as acrylonitrile
- the back surface of the light guide plate is subjected to a light diffusing white ink scattering pattern and fine unevenness processing.
- the scattering pattern and fine unevenness make the light incident from the light source or point light source uniform and efficient in the light exit direction. It is an optical conversion element for the purpose of causing surface emission.
- spectral reflectance was measured using a standard white plate certified by NP ⁇ (UK National Physical Laboratory) under the conditions of a D65 light source and a viewing angle of 10 degrees, and the Y value was obtained. .
- thermophysical property measuring apparatus TPA-501 manufactured by Kyoto Electronics Industry Co., Ltd.
- Example 2 As described in Example, it was prepared 32-inch backlight using the reflector was measured using a luminance and color unevenness Ltd. ⁇ I 'scale Inc. analyzer Eye SCa LE3.
- Production Example 1 Production of resin composition for light-reflective resin layer (A-1))
- Polycarbonate-based resin (FC1700 manufactured by Idemitsu Kosan Co., Ltd.) that has a copolymer power of polycarbonate and polydimethylsiloxane 40 parts by weight, talc 40 parts by weight, My strength 20 parts by weight (Product name BY16-161, manufactured by Toray Dow Co., Ltd.) 1 part by mass, acid-detergent (Triph-Lufphosphine (manufactured by Johoku Chemical Co., Ltd., product name JC263)) 0. 05 parts by mass, Teflon (registered (Trademark) Powder (Polytetrafluoroethylene (PTFE, manufactured by Asahi Glass Co., Ltd., trade name CD076)) 0. After blending 3 parts by mass, knead at 280 ° C using a twin screw extruder, pelletize, A resin composition (B-1) for the material layer was obtained.
- Polycarbonate-based resin (FC1700 manufactured by Idemitsu Kosan Co., Ltd.) that has a copolymer power of polycarbonate and polydimethylsiloxane 40 parts by weight, talc 40 parts by weight, graphite 20 parts by weight, organopolysiloxane (Product name BY16—161, manufactured by Toray Dow Co., Ltd., 1 part by mass, acid-fouling inhibitor (trif-luphosphine (Johoku Chemical Co., Ltd., trade name JC263)) 0.05 parts by mass, Teflon (registered trademark) powder (Polytetrafluoroethylene (PTFE, Asahi Glass Co., Ltd., trade name CD076)) 0. After 3 parts by mass Then, the mixture was kneaded at 280 ° C. using a twin-screw extruder and pelletized to obtain a resin composition (B-2) for the resin base material layer (B).
- organopolysiloxane Pro
- Polycarbonate-based rosin (FC1700, manufactured by Idemitsu Kosan Co., Ltd.), which has a copolymer power of polycarbonate and polydimethylsiloxane, per 100 parts by mass, an organic alkali metal salt (Dainippon Ink Co., Ltd. MegaFuck F114) 0.3 mass Part, Teflon (registered trademark) powder-reactive silicone compound (KR511 manufactured by Shin-Etsu Chemical Co., Ltd.) 0.3 parts by weight, black colored masterbatch 1 part by weight, antioxidant 0.03 parts by weight Then, the mixture was kneaded at 280 ° C. using a twin-screw extruder and pelletized to obtain a resin composition (C 1) for a flexible resin layer.
- FC1700 organic alkali metal salt
- Teflon (registered trademark) powder-reactive silicone compound KR511 manufactured by Shin-Etsu Chemical Co., Ltd.
- the resin composition for the resin base layer (B-1) and the resin composition for the flexible resin layer (C-1) two types and two layers of multilayer extrusion molding were performed at an extrusion temperature of 260 ° C. .
- the light-reflective resin layer (A) use E6SV manufactured by Toray Industries, Inc., insert the E6SV into the roll immediately after the multilayer extrusion (roll temperature 100 ° C), and laminate it to form a three-kind three-layer structure A multilayer sheet for light reflection was obtained.
- the Y value of the reflected light from the E6SV single layer of the light-reflective resin layer (A) used was 99.5.
- the thickness of the obtained resin base material layer was 0.5 mm, and the flexural modulus of the single layer was lOGPa.
- the thickness of the flexible resin layer was 0.1 mm, and the tensile elongation of the single layer was 101%.
- the resulting light-reflective resin layer has a thickness of 0.4 mm and the resin substrate layer has a thickness of 0.5 mm.
- the flexural modulus of the single layer was 1 OGPa.
- the thickness of the single layer of the light-reflective resin layer was 0.4 mm, the thickness of the resin base material layer was 0.5 mm, and the flexural modulus of the single layer was 1 OGPa.
- the thickness of the flexible resin layer was 0.1 mm, and the tensile elongation of the single layer was 101%.
- the Y value of the reflected light in the single layer of the light-reflective resin layer of the obtained light-reflective multilayer sheet was 98.5.
- the thickness of the light-reflective resin layer was 0, 4 mm, the thickness of the resin substrate layer was 0.5 mm, the thermal conductivity of the single layer was 3 WZ ° C, and the flexural modulus was 9.5 GPa.
- the thickness of the flexible resin layer was 0.1 mm, and the tensile elongation of the single layer was 101%.
- Lm m total thickness 1.
- Omm three-layer multilayer sheet for light reflection (4-1).
- Example 1 2 Manufacture of reflector for light guide type backlight
- Example 1 Using the three-layer light reflecting multilayer sheet (1 1) obtained in 1 above, a reflector (lamp housing) for installing the light guide plate was thermoformed at 180 ° C and punched (trimming) ), A light entrance window for placing the light source in contact with the light guide plate and a reflector for covering the light source are provided, and then a folding margin for forming a frame around the reflector opening is provided. A 17-inch reflector that can form the frame of the light exit surface of the light plate was molded.
- Example 2-2 Manufacture of reflector for direct type backlight for linear light source
- a holder, diffuser plate support pillar, diffuser plate support frame, reinforcing rib structure around the reflector, and a screwed boss on the back of the bottom surface of the reflector plate were molded into a 32 inch reflector.
- Example 3-2 Manufacture of reflector for direct type backlight for linear light source
- Example 3-1 vacuum and pressure forming was performed at 180 ° C., and a reflector having a corrugated reflective surface and The lamp holder, diffuser plate support pillar, diffuser plate support frame, reinforcing rib structure around the reflector, and screwed boss on the back of the reflector plate were formed to form an integrated 32-inch reflector. .
- the amount of stagnation of this reflector was 30 mm.
- Example 4 2 Manufacture of reflector for direct type backlight for linear light source
- Example 4 Using the three-layer light-reflective multilayer sheet (4-1) obtained in 1, vacuum forming at 180 ° C and pressure forming, a reflecting plate having a corrugated reflecting surface, a lamp holder, Diffusion plate support pillar, diffusion plate support frame, reinforcing rib structure around the reflector, and screwed boss part on the back of the bottom of the reflector plate to form a 32 inch reflector.
- the sag of this reflector was 30 mm.
- Example 5-2 Manufacture of reflector for direct type backlight for point light source
- a reflector having a plurality of parabolic cross-section arrays on the bottom surface of the reflecting surface was molded by compression molding using the three-layered light reflecting multilayer sheet (41) obtained in Example 41.
- a through hole for exposing the LED light source was provided on the bottom of the parabolic minimum. Comparative Example 1 2 (Manufacture of reflector for direct type backlight for linear light source)
- Comparative Example 11 Using the single-layer sheet for light reflection obtained in 1, vacuum-pressure forming at 180 ° C, reflecting plate having corrugated reflecting surface, lamp holder, diffusion plate support column, diffusion A 32-inch reflector was integrally formed by providing a reinforcing rib structure around the plate support frame, reflector, and a boss for screwing on the back of the bottom of the reflector. The amount of stagnation of this reflector was 80 mm.
- Example 1 3 Manufacture of light guide type backlight shown in FIG. 1
- FIG. 1 is a cross-sectional view of a light guide type backlight obtained in this example.
- Example 1 After placing the light guide plate 5 on the reflector obtained in 2 above, the folding margin (frame portion) provided around the opening of the reflector is folded so as to cover the light guide plate, and then the ultrasonic wave The light guide plate 5 and the reflector were fixed by welding with a welder. Insert the light source 1 (cold cathode tube) from the opening at the side edge of the reflector containing the obtained light guide plate 5, fix the light source with the electrode terminal cover made of silicone rubber, connect to the inverter, The knocklight shown in Fig. 1 was completed. When the brightness of the obtained backlight was measured, the brightness was about 10% higher than that of the conventional system with the E6SV reflector sheet and sheet metal case strength.
- Example 2-3 Manufacture of direct type backlight shown in FIG. 2
- FIG. 2 is a sectional view of the backlight directly under the linear light source obtained in this example.
- the light source 1 (16 cold cathode tubes, total power consumption 140 W) and an inverter are mounted, connected to the light source 1, and the light diffusing plate 8 is mounted on the reflector opening. Furthermore, a light diffusing film 6 was loaded on the light diffusing plate 8 to produce a knocklight shown in FIG. 2 having a reflector power without using a metal chassis by processing a 32-inch sheet metal.
- the brightness of the obtained backlight was measured, it was about 6% higher than the Toray Industries Inc. reflection sheet E6SV and the backlight of the conventional system with sheet metal chassis strength.
- a thermocouple was inserted into the backlight after lighting for 1 hour, and the temperature was measured. As a result, the internal atmosphere temperature was 80 ° C.
- Example 3-3 Manufacture of direct type backlight shown in FIG. 2
- Example 3-2 Mount the light source 1 (16 cold cathode tubes, total power consumption 140W) and inverter on the reflector obtained in Example 3-2, connect to the light source, and stack the light diffusing plate 8 on the reflector opening, Furthermore, a light diffusion film 6 is mounted on the light diffusion plate 8, and a metal chassis is formed by processing a 32-inch sheet metal.
- the knocklight shown in Fig. 2 was also manufactured with a reflector force that does not use the. When the brightness of the obtained backlight was measured, it was about 6% higher than the Toray Industries Inc. reflection sheet E6SV and the backlight of the conventional system with sheet metal chassis strength. A thermocouple was inserted into the backlight after lighting for 1 hour, and the temperature was measured. As a result, the internal atmosphere temperature was 80 ° C.
- Example 4 3 Manufacture of direct type backlight shown in FIG. 2
- Example 4 The reflector obtained in 2 is equipped with a light source 1 (16 cold cathode tubes, total power consumption 140 W) and an inverter, connected to the light source, and a light diffusing plate 8 mounted on the reflector opening.
- the light diffusing film 6 was loaded on the light diffusing plate 8, and the knocklight shown in Fig. 2 with a reflector power without using a metal chassis by processing a 32-inch sheet metal was manufactured.
- the brightness of the obtained backlight was measured, it was about 6% higher than the Toray Industries Inc. reflection sheet E6SV and the backlight of the conventional system with sheet metal chassis strength.
- a thermocouple was inserted into the backlight after lighting for 1 hour, and the temperature was measured. The temperature of the internal atmosphere was 70 ° C.
- Example 5-3 Manufacture of direct type backlight shown in FIG. 3
- FIG. 3 is a cross-sectional view of the backlight directly under the point light source obtained in this example.
- the reflector obtained in Example 5-2 is equipped with a point light source 11 (210 LED light sources, total power consumption 200 W) and a control circuit, connected to the light source, and a light diffusing plate 8 is mounted on the reflector opening, Furthermore, a light diffusing film 6 was loaded on the light diffusing plate 8, and the backlight shown in FIG. 3 having a reflector force without using a metal chassis by processing a 32-inch sheet metal was manufactured.
- a light diffusing film 6 was loaded on the light diffusing plate 8
- the backlight shown in FIG. 3 having a reflector force without using a metal chassis by processing a 32-inch sheet metal was manufactured.
- both showed a brightness about 10% higher than the knock light of the conventional system that also has the reflection sheet E60L manufactured by Toray Industries, Inc. and the sheet metal laminate (Alset manufactured by Mitsubishi Sewa Co., Ltd.). It was.
- Comparative Example 1 A reflector (16 cold cathode tubes, total power consumption 140 W) and an inverter are mounted on the reflector obtained in 2 above, connected to the light source, a diffuser is mounted on the reflector opening, and a diffuser A diffusion film was placed on top of it, and a backlight with a reflector power that does not use a metal chassis made of a 32-inch sheet metal cabinet was manufactured.
- the present invention makes it possible to reduce the number of parts of the lighting device and the assembly process, and to reduce the weight and thickness.
- a multilayer sheet for reflecting light for forming a reflector having a mold, a reflector using the multilayer sheet, a lighting device including the reflector, and a liquid crystal display device including the lighting device.
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Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200711001482 DE112007001482T5 (de) | 2006-06-21 | 2007-05-24 | Mehrschichtige Folie für die Lichtreflexion, Reflektor, Beleuchtungsanordnung und Flüssigkristall-Display-Anordnung unter dessen Verwendung |
| US12/305,978 US20090303411A1 (en) | 2006-06-21 | 2007-05-24 | Multilayered sheet for light reflection, reflector, lighting unit and liquid crystal display device using the same |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006171758A JP2008003254A (ja) | 2006-06-21 | 2006-06-21 | 光線反射用多層シート、これを用いた反射器、照明装置及び液晶表示装置 |
| JP2006-171758 | 2006-06-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007148508A1 true WO2007148508A1 (ja) | 2007-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/060622 Ceased WO2007148508A1 (ja) | 2006-06-21 | 2007-05-24 | 光線反射用多層シート、これを用いた反射器、照明装置及び液晶表示装置 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20090303411A1 (ja) |
| JP (1) | JP2008003254A (ja) |
| KR (1) | KR20090023395A (ja) |
| CN (1) | CN101467077A (ja) |
| DE (1) | DE112007001482T5 (ja) |
| TW (1) | TW200813567A (ja) |
| WO (1) | WO2007148508A1 (ja) |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20090023395A (ko) | 2009-03-04 |
| US20090303411A1 (en) | 2009-12-10 |
| TW200813567A (en) | 2008-03-16 |
| JP2008003254A (ja) | 2008-01-10 |
| CN101467077A (zh) | 2009-06-24 |
| DE112007001482T5 (de) | 2009-04-30 |
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