WO2006057347A1 - 発光体及び発光システム - Google Patents
発光体及び発光システム Download PDFInfo
- Publication number
- WO2006057347A1 WO2006057347A1 PCT/JP2005/021706 JP2005021706W WO2006057347A1 WO 2006057347 A1 WO2006057347 A1 WO 2006057347A1 JP 2005021706 W JP2005021706 W JP 2005021706W WO 2006057347 A1 WO2006057347 A1 WO 2006057347A1
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- WIPO (PCT)
- Prior art keywords
- light
- scattering agent
- resin
- light scattering
- coating layer
- Prior art date
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Classifications
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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
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—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
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0041—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided in the bulk of the light guide
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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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
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
Definitions
- the present invention relates to a light emitter that emits light by light from a light source, and a light emitting system that includes the light emitter and the light source.
- a light emitter that emits light with light of a light source power
- light emitted from the light source and guided to the inside of the light emitter is repeatedly reflected inside the light emitter before being emitted to the outside of the light emitter.
- the light travel within the light emitter is lengthened and attenuates until the light exits the light emitter. For this reason, a light emitting body with high transparency is required, and a light source with high directivity is also required.
- the light emitter emits light in a direction perpendicular to or close to the surface of the light emitter.
- the amount of such light is small. Goes in a direction along the surface of the light emitter.
- the conventional illuminant has a problem that it does not feel so bright to the human eye.
- a linear groove is formed on the surface of a plate-shaped light transmission member formed of a transparent acrylic plate, and the plate-shaped light transmission member
- the light from the LED lamp can be emitted not only on the side surface of the plate-shaped light transmission member but also in a more uniform state.
- the possible surface emitters are listed.
- Patent Document 2 a number of straight grooves are provided in parallel on the entire rear surface of the transparent light guide plate, and the light guide plate is formed on the side of the light guide plate from a direction perpendicular to the grooves.
- a planar light emitter with a spot-like light emitter that emits light inside is described.
- Patent Document 3 a transparent member made of a transparent synthetic resin layer not containing a light scattering agent and a translucent member made of a translucent synthetic resin layer containing a light scattering agent are joined.
- Patent Document 4 an LED lamp is inserted into a mounting hole provided on one end surface of a light-transmitting plate-like acrylic member, and a reflective tape is pasted on a portion other than the light emitting surface of the acrylic member. The attached illuminant is described!
- Patent Document 5 a side light emitting portion of a rod-shaped first light guide having a point light source disposed at the tip is coupled to one side end of a plate-shaped second light guide.
- a surface light-emitting device that obtains radiated light from the main surface of the second light guide is described.
- Patent Document 6 describes a laminate light emitting body composed of a coating layer containing a light scattering agent and a base material layer not containing the light scattering agent.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2000-348518
- Patent Document 2 JP 2002-100226 A
- Patent Document 3 Japanese Patent Laid-Open No. 11-329044
- Patent Document 4 JP-A-8-076703
- Patent Document 5 Japanese Patent Laid-Open No. 11 191307
- Patent Document 6 Japanese Unexamined Patent Application Publication No. 2004-327204
- Patent Documents 1 and 2 cannot obtain a planar light emitter without forming a linear groove. If the semi-transparent material is not joined, a planar light emitter cannot be formed, and the technique disclosed in Patent Document 4 has a problem that only one light emitting surface is required and a reflective tape needs to be pasted on other than the light emitting surface.
- Patent Document 5 a surface light emitter cannot be obtained without the first light emitter that converts a point light source into a linear light source, and the technique of Patent Document 6 has a problem of poor light emission performance.
- the present invention solves the above-mentioned problems, and an object of the present invention is to provide a light emitting body that can sufficiently obtain light emitted from the surface (main surface) or the end surface, and a light emitting device including the light emitting body and a light source. It is intended to provide a system.
- the present inventors have a light-transmitting screen.
- a light source that does not form grooves, pictures, characters, etc. by adding a light scattering agent to the fat and forming a substrate layer and a coating layer of the phosphor using the resin containing the light scattering agent
- the present inventors have found that it is possible to obtain a light-emitting body that can sufficiently emit light of all surface forces including the surface other than the light incident surface and the end surface (side surface).
- the object of the present invention has been achieved by the following light emitters and light emitting systems.
- the present invention is a light emitting body that emits light by light from a light source, and the light emitting body includes a coating layer containing a first light scattering agent and a base material layer containing a second light scattering agent.
- the ratio of the thickness of the coating layer to the thickness of the base material layer is 1Z300 to 1Z7, and the ratio of the light scattering agent concentration of the coating layer to the light scattering agent concentration of the base material layer is 100Zl to 2000Zl. It is a illuminant.
- the coating layer includes a first light-transmitting resin and the first light scattering agent
- the base material layer is a second light. It contains a transparent resin and the second light scattering agent.
- the first light transmissive resin is a methacrylic resin.
- the second light transmissive resin is a methacrylic resin.
- a light emitting system is a light emitting system including the light emitter and a light source, and the light source is an LED light source.
- the present invention it is possible to improve the luminance ratio L ZL and to emit light with excellent emission luminance.
- the luminance ratio L / L is set at a position 10 mm away from the light source.
- a luminous body having a luminance ratio close to 1 is
- the manufacture is facilitated, the light emitters can be mass-produced, and the cost can be reduced.
- the best light emission performance can be obtained.
- the light emitting system of the present invention it is possible to realize a light emitting system having a high brightness even at a position apart from the light source power.
- FIG. 1 (a) is a perspective view showing the structure of a light emitter according to the present invention.
- FIG. 1 (b) is a plan view showing a structure of a light emitter according to the present invention.
- FIG. 2 is a schematic diagram showing the state of light emission from the surface of the illuminant and the end face force according to the present invention.
- FIG. 3 is a view showing a photograph showing how an actual light emitter emits light.
- FIG. 4 is a schematic diagram for explaining a method for measuring the luminance of the light emitter according to the present invention.
- FIG. 5 is a diagram showing the distance and luminance distribution of the light source power on the surface of the light emitter.
- FIG. 1 (a) and 1 (b) are a perspective view and a plan view showing the structure of the light emitter according to the present invention
- FIG. 2 shows the state of light emission from the surface and end face of the light emitter according to the present invention
- Fig. 3 is a diagram showing a photograph showing how an actual light emitter emits light
- Fig. 4 is a schematic diagram illustrating a method for measuring the luminance of the light emitter according to the present invention
- Fig. 5 is a light emitter. It is a figure which shows the distance from the light source of a surface, and luminance distribution.
- FIGS. 1 to 3 show a light emitter 1 that emits light by light emitted from an LED (Light Emitting Diode) light source 2 as an example of a light source.
- Fig. 4 shows a schematic diagram of the luminance measurement method. A cold cathode tube is used as the light source in Fig. 4.
- the light emitter of the present invention has a coating layer containing a first light scattering agent and a base material layer containing a second light scattering agent.
- the coating layer is a first resin having light permeability (hereinafter referred to as “the first resin”). (Referred to below as a light transmissive resin) and a first light scattering agent.
- the base layer is preferably composed of a second light transmissive resin and a second light scattering agent. Preferably, it is configured.
- the first light scattering agent and the second light scattering agent may be the same or different. Further, the first light transmissive resin and the second light transmissive resin may be the same or different.
- the light emitter 1 of the embodiment shown in Figs. 1 to 3 includes a base material layer and a coating layer obtained by forming a thermoplastic resin in which a light scattering agent is dispersed into a sheet shape.
- a thermoplastic resin sheet any of an extruded sheet produced by extrusion molding and a cast sheet produced by a casting method can be applied.
- thermoplastic resins As the light-transmitting resin constituting the substrate layer and the coating layer of the phosphor of the present invention, various thermoplastic resins can be applied, but methacrylic resin, polycarbonate resin, styrene are preferable.
- An optical material such as a system resin, a cyclic olefin resin, or an amorphous polyester resin, and more preferably a methacrylic resin.
- the methacrylic resin can be obtained by copolymerizing 70% by weight or more of methyl methacrylate or ethyl methacrylate and these and a copolymerizable monomer.
- Monomers that are copolymerizable with methyl methacrylate or ethyl methacrylate include butyl methacrylate, ethyl methacrylate, methyl methacrylate, propyl methacrylate, cyclohexyl methacrylate, methacrylic acid file, methacrylic acid 2 — Methacrylic acid esters such as ethyl hexyl, methyl acrylate, ethyl acrylate, butyl acrylate, cyclohexyl acrylate, acrylic acid phenyl, acrylic acid esters such as 2-ethylhexyl acrylate, methacrylic acid Unsaturated acids such as acid and acrylic acid are applicable
- the base material layer and the coating layer of the light-emitting body heat-resistant metatalyl resin, low-hygroscopic metatalyl resin, impact-resistant methacrylic resin, and the like are also applicable.
- the impact-resistant metataryl resin is, for example, a blend of a rubber elastic body with a methacrylic resin.
- a rubber elastic body As an example of the rubber elastic body, an elastic layer and an inelastic layer are alternately formed around an acrylic polymer core material. And a multistage polymer produced by a multistage sequential polymerization method. By blending this rubber elastic body with a methacryl resin, the above-mentioned impact-resistant methacrylic resin can be obtained.
- polycarbonate resin is used as the resin constituting the base material layer and the coating layer of the luminescent material, V
- a divalent phenolic compound represented by bisphenol A is used as the polycarbonate resin.
- a polymer derived from is used.
- the production method of the polycarbonate resin is not particularly limited, and a well-known conventional method such as a phosgene method, a transesterification method or a solid phase polymerization method can be applied.
- the cyclic olefin-based resin is a polymer containing a cyclic olefin skeleton in a polymer chain such as norbornene cyclohexane, or a copolymer containing these, and belongs to an amorphous thermoplastic resin.
- the manufacturing method is not particularly limited.
- a cyclic olefin fin resin mainly composed of norbornene “Topas” (trade name) manufactured by Ticona Co., Ltd., which is an ethylene′norbornene copolymer, can be applied.
- “Zeonex” (trade name) manufactured by Nippon Zeon Co., Ltd. is applicable.
- the styrene-based resin is a homopolymer, a copolymer, or a polymer blend that can obtain strength with other polymers, such as homopolymers and copolymers having styrene as an essential component.
- polystyrene resin AB resin which is a copolymer resin of acrylonitrile and styrene
- MS resin which is a copolymer resin of methacrylic acid ester and styrene.
- transparent reinforced polystyrene in which rubber is distributed in the styrene-based resin phase can be preferably used.
- the production method of the styrene-based resin is not particularly limited, and can be produced by a well-known conventional method.
- Examples of amorphous polyester include aliphatic glycols such as ethylene glycol, propylene glycol, 1,4-butanediol, neopentyl glycol, and hexamethylene glycol, and alicyclic glycols such as cyclohexanedimethanol.
- Aromatic dihydroxy compounds such as bisphenol, 1,3 bis (2 hydroxyethoxy) benzene, 1,4 bis (hydroxyethoxy) benzene, or two or more of these selected dihydroxy compounds
- Compound units and aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, 2, 6 naphthalene dicarboxylic acid, oxalic acid, adipic acid, sebacic acid, succinic acid, undecadicarboxylic acid, etc.
- the method for producing the amorphous polyester is not particularly limited, and can be produced by a well-known conventional method.
- KODAR PTEC and PCTA which are products of Eastman Kodak, are examples of commercial brands that can be easily obtained as amorphous polyester.
- a soft polymer may be added to the resin constituting the base layer and the coating layer of the light emitter of the present invention.
- the soft polymer an olefin-based soft polymer composed of OC 1-year-old refin, an isobutylene-based soft polymer composed of isobutylene, a gen-based soft polymer composed of conjugated gen such as butadiene and isoprene, and a cyclic such as norbornene and cyclopentene.
- a polymer, a polymer of an epoxy compound, a fluorine-based rubber, or the like can be applied.
- Materials that can be used as a light scattering agent contained in the base material layer and the coating layer of the phosphor include inorganic fine particles such as calcium carbonate, barium sulfate, alumina, titanium dioxide, silicon dioxide, glass beads, and styrene crosslinked beads. And organic fine particles such as MS cross-linked beads and siloxane-based cross-linked beads.
- hollow cross-linked fine particles such as methacrylic resin, polycarbonate resin, MS resin, cyclic olefin resin, and other highly transparent resin materials, and glass particles are also used as light scattering agents.
- the light scattering agent is preferably dispersed in the resin constituting the base material layer and the coating layer.
- the shape of the light scattering agent dispersed in the base material layer and the coating layer of the illuminant is not particularly limited.
- a light scattering agent having a tetragonal shape or an indefinite shape can be applied.
- the light emitter of the present invention has a specific layer structure. That is, the light emitter of the present invention has a base layer having a low light scattering agent concentration and a coating layer having a high light scattering agent concentration at a specific thickness ratio. Specifically, in the present invention, the ratio of the thickness of the coating layer to the thickness of the base material layer is 1Z. The ratio of the light scattering agent concentration of the coating layer to the light scattering agent concentration of the base material layer is 100/1 to 2000/1.
- the ratio of the thickness of the coating layer to the thickness of the base material layer is referred to as “coating layer Z thickness ratio of the base material layer”, and the light scattering agent of the coating layer with respect to the light scattering agent concentration of the base material layer.
- the concentration ratio is referred to as “light scattering agent concentration ratio of coating layer Z substrate layer”.
- the light scattering agent concentration is a value in which the weight fraction of the light scattering agent contained in the light-transmitting resin is defined in ppm.
- the thickness ratio of the coating layer Z base material layer is 1Z200 to 1Z15, and the light scattering agent concentration ratio of the coating layer Z base material layer is in the range of 200 Zl to 1500 Zl. More preferably, the thickness ratio of the coating layer to the base material layer is 1 to 100 to 1 to 25, and the light scattering agent concentration ratio of the coating layer to the base material layer is in the range of 300Z1 to: LOOOZ1 or less.
- the present invention it is preferable to disperse a light scattering agent in a light-transmitting resin and use the composition as a base material layer and a coating layer. As described above, in the present invention, it is preferable to use a thermoplastic resin as the light-transmitting resin.
- the method for producing the permeable rosin composition is not particularly limited. However, it is preferable to prepare a light-transmitting resin composition by previously dispersing the light scattering agent fine particles uniformly in an organic liquid and using the obtained dispersion.
- the light-scattering agent fine particles are dispersed in an organic liquid in advance, so that the light-scattering agent fine particles are contained in the light-transmitting resin. It is preferable to disperse uniformly. In order to uniformly disperse the light scattering agent particles in the organic liquid, it is preferable to use an ultrasonic generator.
- the organic liquid includes, in addition to a general organic liquid, a polymerizable monomer that constitutes a light-transmitting resin, and the fine particles of the light scattering agent dissolve and swell.
- a general organic liquid a polymerizable monomer that constitutes a light-transmitting resin
- the fine particles of the light scattering agent dissolve and swell.
- organic liquids may be mixed and used in an arbitrary ratio depending on the dispersion state of the light scattering agent fine particles.
- ketones such as acetone and methyl ethyl ketone
- aromatics such as xylene and toluene
- alcohols such as methanol and ethanol
- the polymerizable monomer for example, when the light transmitting resin is methallyl resin, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, methacrylic acid phenol , Methacrylic acid esters such as 2-ethylhexyl methacrylate, methyl acrylate, ethyl acrylate, butyl acrylate, cyclohexyl acrylate, acrylic acid acrylate, 2-ethyl hexyl acrylate, etc. Acrylic acid esters, unsaturated acids such as methacrylic acid and acrylic acid can be used.
- the light-scattering resin particles are used as the light-transmitting resin.
- the following method (1) or (2) can be applied as a method of uniformly dispersing in the inside.
- thermoplastic resin melt-kneading a transparent thermoplastic resin to be a base material layer and a film layer and fine particles of a light scattering agent in an extruder:
- the light scattering agent dispersion is prepared by dispersing the light scattering agent fine particles in an organic liquid, preferably using an ultrasonic generator.
- the prepared light scattering agent dispersion and light-transmitting resin are mixed, and the mixture is melt-kneaded with an extruder.
- the organic liquid to be used is not limited as long as the fine particles of the light scattering agent do not cause dissolution or swelling and are uniformly dispersed as described above.
- several kinds of organic liquids can be mixed and used at an arbitrary ratio.
- the mixing ratio of the light scattering agent fine particles to the organic liquid can be arbitrarily determined in consideration of the dispersibility of the light scattering agent fine particles. It is preferable to mix the fine particles of the scattering agent in the range of 0.001 to 80 parts by weight.
- the mixing ratio of the light scattering agent dispersion composed of the light scattering agent fine particles and the organic liquid and the light-transmitting resin used as the base material of the light emitter is also considered in handling in the mixing extrusion process.
- the method of mixing the light scattering agent dispersion into the light-transmitting rosin is not particularly limited.
- mixing can be performed by a well-known and conventional mixing method such as mixing with a Henschel mixer, mixing with a super floater, or mixing with a tumbler.
- the extruder used for melt kneading the above mixture may be an ordinary single-screw or twin-screw extruder that does not necessarily require the use of a unique one.
- an extruder capable of devolatilization under a pressure of preferably 300 Torr or less at the vent port is preferable.
- a multilayer die capable of controlling the film thickness is used as the die.
- the temperature of the extruder can be arbitrarily set according to the type of light transmissive resin used. For example, when methacrylic resin is used as the light-transmitting resin, it is around 180 ° C to 260 ° C.
- the light scattering agent fine particles are preferably generated in the raw material monomer of the light-transmitting resin used as the base material or in a monomer copolymerizable with this monomer.
- a method of dispersing using an apparatus can be applied.
- the light scattering agent fine particles are dispersed in advance in a part of the raw material monomer and then mixed with a partially polymerized polymer solution or the like.
- the quantity ratio between the light scattering agent fine particles and the raw material monomer to disperse the light scattering agent can be arbitrarily determined in terms of dispersibility, viscosity at the time of charging, handling properties and the like.
- the polymerization conditions such as the polymerization temperature, polymerization time, and amount of polymerization initiator in the casting method, and the method for forming the sheet (cast plate) to be the light emitter.
- a method for forming the sheet for example, a glass cell casting method, a continuous casting method, or the like can be applied.
- the ultrasonic generator used for dispersing the particles is not particularly limited, and a commercially available ultrasonic cleaner, ultrasonic stirrer, or the like can be used.
- a commercially available ultrasonic cleaner, ultrasonic stirrer, or the like can be used.
- an ultrasonic cleaner with an ultrasonic frequency of 28 kHz to 1 OO kHz is generally used.
- the irradiation time by the ultrasonic generator can be arbitrarily set according to the dispersion state of the light scattering agent fine particles, but it is generally preferable to irradiate for about 1 to 60 minutes.
- a light emitting system can be formed by using the light emitter and the LED light source of the present invention.
- an LED light source a light source having a printed circuit board and an LED chip array composed of a plurality of pairs of red LED chips, green LED chips, and blue LED chips arranged in a row repeatedly mounted on the printed circuit board.
- a 3inl type light source in which the chips of the three primary colors are combined into one can be used.
- the light transmittance is measured using the "COLOR AND COLO R DEFFERENCE METER MODEL TC-" manufactured by Tokyo DENSHOKU CO., LTD. 1500MC ", using standard light as the light source, and measuring the tristimulus values XYZ of the luminous flux that passed through a 220mm long test piece (8mm wide x 30mm high x 220mm long) at a viewing angle of 10 degrees.
- the Y value was used as the light transmittance.
- the light scattering agent fine particles are dispersed in an organic liquid by ultrasonic waves, and the obtained dispersion is measured using a microtrack method.
- the 50% cumulative particle size was taken as the average particle size.
- a test piece having a size of 220 mm in length, 30 mm in width, and 8 mm in thickness was cut out from the laminated sheet, and the cut surface was polished. Then, as shown in FIG. It was 42% when measured using the measurement method described above.
- a cold-cathode tube having a light incident width of 5 mm at the center of one end face of the test piece.
- BM-7 manufactured by Topcon Co., Ltd.
- the luminance of the upper surface of the test piece was measured at a viewing angle of 1 degree and a separation distance of 50 cm between the luminance meter and the test piece.
- the luminance (L) at a distance of 10 mm from the light source is 75 cdZm 2 , and the distance from the light source is 210 mm.
- the luminance (L) at the position was 42 cdZm 2 and the luminance ratio L ZL was 1.8.
- a test piece was obtained by extruding a multilayer sheet in the same manner as in Example 1 except that the amount of the light scattering agent in the base material layer was 1.5 ppm.
- the light transmittance of the test piece was 60%, L was 62 cdZm 2 , L was 36 cdZm 2 , and the luminance ratio L / L was 1.7.
- a test piece was obtained by extruding a laminated sheet in the same manner as in Example 1 except that the amount of the light scattering agent in the base material layer was changed to 5 ppm.
- the test piece had a light transmittance of 25%, L was 98 cd / m 2 , L was 43 cd / m 2 , and the luminance ratio L / L was 2.3.
- the laminated sheet was extruded in the same manner as in Example 1 except that the thickness of the coating layer of the sheet was 100 ⁇ m and the alumina concentration serving as a light scattering agent in the coating layer was 2000 ppm. A specimen was obtained. The light transmittance of the test piece is 41%, L is 78 cdZm 2 , L is 46 cdZm
- the light scattering agent for the coating layer was calcium carbonate having an average particle size of 7.5 ⁇ m, and the amount of the light scattering agent for the coating layer was 3500 ppm. Then, the laminated sheet was extruded to obtain a test piece. The specimen has a light transmittance of 40% and L is 65 cdZm.
- L 36 cdZm 2 and the luminance ratio L / L was 1.8.
- Comparative Example 1 a test piece was obtained by extruding a single layer sheet not containing a light scattering agent.
- the specimen has a light transmittance of 87%, L is 3. lcdZm 2 , L is 0.13 cdZm 2 and the luminance ratio L
- a test piece was obtained by extruding a monolayer sheet in the same manner as in Comparative Example 1 except that the amount of the light scattering agent was 2 ppm.
- the specimen has a light transmittance of 45% and L is 20 cd.
- test piece was obtained by extruding a laminated sheet in the same manner as in Example 1 except that the base material layer did not contain a light scattering agent.
- the specimen has a light transmittance of 82% and L is 38 cdZm 2
- L was 17 cdZm 2 and the luminance ratio L ZL was 2.4.
- a test piece was cut out from the sheets obtained in Examples 1 to 4 and Comparative Examples 1 to 4 to a size of 300 mm in length, 200 mm in width, and 8 mm in thickness, and the cut surface was polished.
- a light source was arranged on the end face of the direction, and a visual test was conducted by a total of 10 lighting designers and interior designers (A to J). The results are shown in Table 1.
- the evaluation criteria in Table 1 are as follows.
- Comparative Example 1 has 10 people who do not feel light emission from the surface and end face at all. Although all were low rated, each of Examples 1 to 4 generally felt that the light emission from the surface and end face was excellent as V, and was highly evaluated as being extremely clear, excellent in light output balance and design. Got. Comparative Examples 2 and 4 were evaluated to be inferior to each of the examples because the luminance ratio was good and the luminance was low.
- FIG. 5 shows the relationship between the distance and the luminance (L 1, L 2) of the light source power of each example and comparative example.
- the substrate of the luminescent material, the light scattering agent, the production method, the method for measuring the brightness, etc. are the same as in the above examples.
- the addition of a light scattering agent to the substrate and the coating is effective in improving the luminance and luminance ratio.
- a light scattering agent it is not limited to the amount added in each of the above examples or the average particle size of the light scattering agent. I can do it.
- Examples of utilization of the present invention include display devices such as shelves, showcases, partitions, signs, etc., indicators such as emergency exits and toilets, surface-emitting illuminators, surface-emitting and edge-emitting illuminators, and other lighting fixtures and panels. It is widely applicable to building materials such as partitions, walls, kitchens, bathrooms, toilets, stairs, closets, billboards, underfloor lighting, and other large-scale game machines such as arcade game machines and hoods.
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05809188A EP1816394A4 (en) | 2004-11-26 | 2005-11-25 | LIGHT-EMITTING BODY AND LIGHT-EMITTING SYSTEM |
US11/791,737 US20080165540A1 (en) | 2004-11-26 | 2005-11-25 | Light Emitting Body and Light Emitting System |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004341899 | 2004-11-26 | ||
JP2004-341901 | 2004-11-26 | ||
JP2004-341899 | 2004-11-26 | ||
JP2004-341900 | 2004-11-26 | ||
JP2004341901 | 2004-11-26 | ||
JP2004341900 | 2004-11-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006057347A1 true WO2006057347A1 (ja) | 2006-06-01 |
Family
ID=36498080
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/021706 WO2006057347A1 (ja) | 2004-11-26 | 2005-11-25 | 発光体及び発光システム |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080165540A1 (ja) |
EP (1) | EP1816394A4 (ja) |
KR (1) | KR20070074634A (ja) |
TW (1) | TWI275734B (ja) |
WO (1) | WO2006057347A1 (ja) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11329044A (ja) * | 1998-05-11 | 1999-11-30 | Toyoda Gosei Co Ltd | 面状発光装置 |
JP2000214313A (ja) * | 1999-01-22 | 2000-08-04 | Elf Atochem Sa | 光拡散複合パネル |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2980776B2 (ja) * | 1992-06-04 | 1999-11-22 | 東ソー株式会社 | バックライト |
JP3187280B2 (ja) * | 1995-05-23 | 2001-07-11 | シャープ株式会社 | 面照明装置 |
-
2005
- 2005-11-25 TW TW094141588A patent/TWI275734B/zh not_active IP Right Cessation
- 2005-11-25 US US11/791,737 patent/US20080165540A1/en not_active Abandoned
- 2005-11-25 KR KR1020077011600A patent/KR20070074634A/ko not_active Application Discontinuation
- 2005-11-25 WO PCT/JP2005/021706 patent/WO2006057347A1/ja not_active Application Discontinuation
- 2005-11-25 EP EP05809188A patent/EP1816394A4/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11329044A (ja) * | 1998-05-11 | 1999-11-30 | Toyoda Gosei Co Ltd | 面状発光装置 |
JP2000214313A (ja) * | 1999-01-22 | 2000-08-04 | Elf Atochem Sa | 光拡散複合パネル |
Non-Patent Citations (1)
Title |
---|
See also references of EP1816394A4 * |
Also Published As
Publication number | Publication date |
---|---|
US20080165540A1 (en) | 2008-07-10 |
TW200624717A (en) | 2006-07-16 |
EP1816394A4 (en) | 2008-02-13 |
TWI275734B (en) | 2007-03-11 |
EP1816394A1 (en) | 2007-08-08 |
KR20070074634A (ko) | 2007-07-12 |
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