WO2005001872A2 - Systeme eclairant a haute performance mecanique et optique - Google Patents
Systeme eclairant a haute performance mecanique et optique Download PDFInfo
- Publication number
- WO2005001872A2 WO2005001872A2 PCT/FR2004/001575 FR2004001575W WO2005001872A2 WO 2005001872 A2 WO2005001872 A2 WO 2005001872A2 FR 2004001575 W FR2004001575 W FR 2004001575W WO 2005001872 A2 WO2005001872 A2 WO 2005001872A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- illuminating system
- particles
- phosphor particles
- matrix
- substrate
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/54—Screens on or from which an image or pattern is formed, picked-up, converted, or stored; Luminescent coatings on vessels
- H01J1/62—Luminescent screens; Selection of materials for luminescent coatings on vessels
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7777—Phosphates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/7794—Vanadates; Chromates; Molybdates; Tungstates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/38—Devices for influencing the colour or wavelength of the light
- H01J61/40—Devices for influencing the colour or wavelength of the light by light filters; by coloured coatings in or on the envelope
Definitions
- the present invention relates to particular shapings of phosphor particles known elsewhere, capable of guaranteeing high mechanical and optical properties, such as mechanical resistance under the most demanding handling conditions, resistance to impact, to abrasion, crushing, cracking, possibly delamination in the event of deposition on a substrate, shearing, bending ... on the one hand, transparency, almost no haze, controlled light transmission between values that can approach 100% and low values in the case of very diffusing materials, optical homogeneity, absence of degradation, yellowing, in particular under the effect of excitation, ... on the other hand.
- phosphor particles refers to particles capable of emitting light, in particular in the visible wavelength range, under the effect of an excitation by uv radiation, electron beam, x-rays, radiation gamma, electric field; these particles are of dimensions for example between a few nanometers and a few microns, and used in particular in lamps in the form of powdery clusters.
- application FR-A1-2 829 481 mentions separately the coating of phosphor particles with a stabilizing film of sodium silicate, on the one hand, and the deposition of the dispersions with other phosphors possibly, in the form of transparent films. on a glass substrate, on the other hand.
- the document does not specify how to obtain a film, let alone a transparent film.
- the invention now provides composites of phosphor particles capable of retaining state and shape integrity for long periods, under usual conditions of use (assembly, installation, cleaning, etc.). This object is achieved by the invention which relates to an illuminating system consisting of phosphor particles dispersed in a solid and durable matrix by allowing manipulation by a user.
- Luminophoric particles falling within the scope of the invention are, for example:
- LaPO 4 Ce (Mg, Ba) AlnOi 9 : Ce
- phosphor particles or mixtures of phosphor particles are characterized by the emission of radiation of wavelengths in the visible range, corresponding to different colors, of white light, or in the ir or the uv.
- the last three cited in the above list are remarkable for the intensity, persistence and duration of their activity, after all sources of excitement have been removed, especially at night.
- the invention therefore makes it possible to have solid, manipulative, honest and resistant lighting objects which can take a multitude of forms such as coating on a substrate, capable of lighting in different colors, opening the way to the most original aesthetic or artistic creations. and varied.
- the particles are luminophores in the visible range, in which most of the applications envisaged below are of the greatest interest.
- the particles are excitable by electromagnetic radiation in the field of UV, visible, ir, either by X-rays or gamma rays, or by a beam of particles (electrons, ions), or by a field. electric.
- Excitation by UV can come from the de-excitation of a plasma or an ionized gas.
- the matrix is inorganic and comprises, in a particularly preferred manner, lithium silicate.
- sodium silicates and, to a lesser extent, potassium are suitable for an opaque lighting system, lithium silicate being particularly recommended for a transparent lighting system.
- sodium silicate the migration to the surface of a very hygroscopic and diffusing crust based on soda is observed, which is constantly regenerating.
- Lithium silicate has proven to be remarkable for the possibility of uniformly distributing therein high concentrations of phosphor particles in the most individualized state possible, as well as for its compatibility with numerous substrates, including glass.
- the matrix comprises lithium silicate
- the matrix is a product of partial or total transformation of lithium silicate, in particular silica, in which the lithium silicate and / or the lithium remains perfectly detectable.
- the matrix comprises a polymerization / polycondensation product of silicon alkoxide such as tetraethoxysilane (TEOS), tetramethoxysilane (TMOS), methyltriethoxysilane (MTEOS) and the like.
- TEOS tetraethoxysilane
- TMOS tetramethoxysilane
- MTEOS methyltriethoxysilane
- the matrix is in the form of a thin layer in adhesion with a substrate consisting in particular of glass for example in the form of a sheet, but also of a slab intended to constitute a screen of a tube, especially for lighting, of fiber or fabric, or of plastic.
- a transparent plastic material such as polycarbonate, polyvinyl butyral, polyolefin such as polyethylene, polypropylene, poly (ethylene terephthalate), polyurethane, acrylic polymer such as poly (methyl methacrylate), ionomer resin, various copolymers ...
- the phosphor particles are in aqueous suspensions and their dimensions are at most equal to 100 nm, preferably to 30 nm, preferably to 10 nm, and the assembly which they form with the matrix is transparent.
- the dimensions of the phosphor particles are between 0.5 and 10 ⁇ m, particles diffusing visible light which can then advantageously be integrated into the matrix (these may be particles other than the phosphor particles, dimensions in particular between 100 nm and 1 ⁇ m, in particular between 300 and 700 nm, such as alumina, or phosphor particles themselves; these particles diffusing visible light are dielectric, semiconductor or conductive).
- phosphor particles with dimensions between 30 and 500 nm are not excluded from the invention, those in particular with dimensions at least equal to 400 nm being capable of diffusing visible light, which can make the addition of other particles unnecessary. diffusing.
- the matrix in the form of a thin layer in adhesion with a substrate, the latter is able to excite the phosphor particles, it is in particular electroconductive, in particular of the electroluminescent type in the UV.
- the substrate is capable of emitting a wavelength of the visible domain wavelength under an appropriate excitation; it is then, for example, made of glass with a cerium content, capable of emitting blue light under ultraviolet radiation.
- the main methods for preparing the lighting system of the invention consist of - cold deposition methods by liquid, such as spray coating, flow coating, dip coating, spin coating, screen printing, followed by treatment thermal at 100-650 ° C for example (annealing, quenching, etc.), depending on the nature of the matrix; or
- the subject of the invention is also: - the application of the lighting system described above to a transparent device;
- the association of the lighting system with the glazing is compatible with all known functionalizations thereof, either on the same face as that supporting the lighting system, above or below, or on other sides of the glazing; hydrophobic / oleophobic, hydrophilic / oleophilic layer, antifouling photocatalytic, stack reflecting heat radiation (antisun) or ir (low-emissivity), antireflection ...
- a glazing separating for example a building enclosure from the exterior atmosphere, the interior face of which is illuminating according to the invention, and the electrochromic exterior face, that is to say capable of darkening by energizing the layer.
- the glazing guarantees maximum transparency and optical quality in the absence of excitation, and constitutes an illuminating surface in the presence of excitation.
- the screen application of the display system can be generalized to all applications requiring a light source and means for processing it, in the form of a light box. These include wallpapers (backlight in English).
- the invention is illustrated by the exemplary embodiments below.
- the YVO: Eu nanoparticles are synthesized colloidally.
- the entire synthesis of colloidal solutions is carried out in water, at a temperature of 60 ° C.
- the insoluble citrate complex is formed by mixing 0.75 equivalent of sodium citrate (0.1 mol.l “1 , 15ml) and 1 equivalent of (Y, Eu) (NO 3 ) 3 (0.1 mol .l “1 , 20 ml).
- 0.75 equivalent of a Na 3 VO 4 solution of pH 12.5 (0.1 mol.l " 1.15 ml) causes the dissolution of the precipitate and the start of the reaction.
- the clear solution obtained is 7.6.
- the colloidal solution obtained is then dialyzed in water at neutral pH in order to eliminate the various counter-ions (Na + , NO 3 " ) or any unreacted species.
- the concentration of the colloidal solution is of the order of 10 "2 mol .. " 1 .
- the colloidal solutions are then concentrated by dry evaporation of the water under mild conditions (40 ° C. and under vacuum). The powder obtained is easily redispersed in a very small volume of water, which makes it possible to obtain very concentrated colloidal solutions (up to 2 mol.1 "1 , or 400 gl " 1 ).
- the size measured in light scattering after redispersion (10 +/- 3 nm) is identical to that of the colloid obtained after dialysis: the colloids undergo no aggregation during the concentration step.
- concentrated colloidal solutions are optically transparent.
- the transparent luminescent films were produced in the following manner. To 4 ml of colloidal solution of YVO 4 : Eu nanoparticles is added 0.2 to 1 ml of lithium silicate (30% by mass in water, pH 12). The soil obtained is filtered (glass fiber prefilter and 0.45 ⁇ m filter) and then deposited by centrifugation (speed of rotation of 1000 rpm for 60 seconds) on float glass substrate (5 x 5 cm 2 ).
- the thin films obtained are finally annealed at 450 ° C for 12 hours.
- the role of this heat treatment is to mechanically consolidate the film and increase luminescence (elimination of hydroxyl groups which inhibit the luminescence of europium ions).
- the thin films after annealing are perfectly transparent and with a thickness of between 0.2 and 0.7 ⁇ m.
- the thin films were placed under a UV lamp emitting at 254 nm. A red luminescence characteristic of europium ions within the YVO 4 matrix is observed. Luminance measurements were carried out and confirmed what is visually observed: the light emission is more intense on the edge of the film than in the center. Indeed, the luminance is 5 Cd / m 2 in the center, while it is 20 Cd / m 2 on the edge.
- This example describes the preparation of diffusing luminescent layers.
- To 176 g of deionized water are added 12.8 g of alumina particles with an average diameter of 500 nm and 0.24 g of polyacrylic acid (50% by weight solution in water). Soda is then added until a pH of 10 is reached. 5 g of LaP ⁇ 4 particles are then added. "Ce, Tb with an average diameter of 2 ⁇ m sold by the company Nichia.
- the mixture is then homogenized in a turbine for 5 11 g of lithium silicate (solution at 30% by weight in water) are then added. After 5 minutes of homogenization in a turbine, the mixture is deposited on a 10 ⁇ 10 cm 2 glass substrate by flow coating.
- the coating obtained has a TL of 60% and a haze close to 100%. Under photoexcitation at 257 nm, a green luminescence is observed produced in the coating.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006516314A JP2007527440A (ja) | 2003-06-23 | 2004-06-23 | 高い機械的及び光学的性能の照明系 |
US10/561,798 US7329983B2 (en) | 2003-06-23 | 2004-06-23 | High mechanical and optical performance illumination system |
EP04767431A EP1644660A2 (fr) | 2003-06-23 | 2004-06-23 | Systeme eclairant a haute performance mecanique et optique |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR03/07573 | 2003-06-23 | ||
FR0307573A FR2856512A1 (fr) | 2003-06-23 | 2003-06-23 | Systeme eclairant a haute performance mecanique et optique |
FR0402931A FR2867897A1 (fr) | 2004-03-22 | 2004-03-22 | Systeme eclairant a haute performance mecanique et optique |
FR04/02931 | 2004-03-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005001872A2 true WO2005001872A2 (fr) | 2005-01-06 |
WO2005001872A3 WO2005001872A3 (fr) | 2005-02-17 |
Family
ID=33554075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2004/001575 WO2005001872A2 (fr) | 2003-06-23 | 2004-06-23 | Systeme eclairant a haute performance mecanique et optique |
Country Status (5)
Country | Link |
---|---|
US (1) | US7329983B2 (fr) |
EP (1) | EP1644660A2 (fr) |
JP (1) | JP2007527440A (fr) |
KR (1) | KR20060017882A (fr) |
WO (1) | WO2005001872A2 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007044711A1 (fr) * | 2005-10-07 | 2007-04-19 | University Of Florida Research Foundation, Inc. | Nanoparticules a composants multiples pour signalisation multiplexee et codage optique |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070069624A1 (en) * | 2005-09-29 | 2007-03-29 | Arunava Dutta | UV-emitting phosphors, phosphor blend and lamp containing same |
JP2008115332A (ja) * | 2006-11-07 | 2008-05-22 | Mitsubishi Chemicals Corp | 蛍光体含有組成物、発光装置、照明装置および画像表示装置 |
KR100827598B1 (ko) * | 2006-11-16 | 2008-05-07 | 매스브라이트 테크날러지 캄퍼니 리미티드 | 평판형 형광램프 |
JP2009143192A (ja) * | 2007-12-18 | 2009-07-02 | Dainippon Printing Co Ltd | 記録媒体 |
WO2010110204A1 (fr) * | 2009-03-27 | 2010-09-30 | コニカミノルタオプト株式会社 | Elément à base de phosphore, procédé de production dudit élément à base de phosphore, et dispositif d'éclairage |
JP5839648B2 (ja) | 2010-04-27 | 2016-01-06 | 株式会社日立製作所 | 太陽電池を用いた発電方法及び太陽電池発電システム |
JP5229748B2 (ja) * | 2010-07-06 | 2013-07-03 | Necライティング株式会社 | 蛍光体および該蛍光体を備える発光装置 |
US11014118B2 (en) | 2015-12-11 | 2021-05-25 | Vitro Flat Glass Llc | Float bath coating system |
CA3107484A1 (fr) * | 2018-08-03 | 2020-02-06 | Boards Of Regents Of The University Of Texas System | Procedes et compositions de dispersion amelioree de luminophore dans une matrice polymere |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3392039A (en) * | 1964-12-17 | 1968-07-09 | Philadelphia Quartz Company Of | Lithium silicate composition |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6348723A (ja) * | 1986-08-18 | 1988-03-01 | Nec Kansai Ltd | 蛍光膜の形成方法 |
JP3267523B2 (ja) * | 1996-11-29 | 2002-03-18 | ウシオ電機株式会社 | 蓄光蛍光体組成物塗布液並びにランプおよびランプ装置 |
JPH10298546A (ja) * | 1997-04-24 | 1998-11-10 | Toshiba Corp | 蛍光体およびその製造方法 |
JP3677538B2 (ja) * | 2001-01-16 | 2005-08-03 | 独立行政法人産業技術総合研究所 | 超微粒子分散ガラス及びこれを用いた表示素子 |
JP2004071908A (ja) * | 2002-08-07 | 2004-03-04 | Matsushita Electric Works Ltd | 発光装置 |
JP2005105244A (ja) * | 2003-01-24 | 2005-04-21 | National Institute Of Advanced Industrial & Technology | 半導体超微粒子及び蛍光体 |
-
2004
- 2004-06-23 WO PCT/FR2004/001575 patent/WO2005001872A2/fr active Application Filing
- 2004-06-23 JP JP2006516314A patent/JP2007527440A/ja active Pending
- 2004-06-23 US US10/561,798 patent/US7329983B2/en not_active Expired - Fee Related
- 2004-06-23 EP EP04767431A patent/EP1644660A2/fr not_active Withdrawn
- 2004-06-23 KR KR1020057024517A patent/KR20060017882A/ko active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3392039A (en) * | 1964-12-17 | 1968-07-09 | Philadelphia Quartz Company Of | Lithium silicate composition |
Non-Patent Citations (4)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 0122, no. 65 (E-637), 23 juillet 1988 (1988-07-23) & JP 63 048723 A (NEC KANSAI LTD), 1 mars 1988 (1988-03-01) * |
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 11, 30 septembre 1998 (1998-09-30) & JP 10 158644 A (USHIO INC; MATERIAL DESIGN:KK), 16 juin 1998 (1998-06-16) * |
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 02, 26 février 1999 (1999-02-26) & JP 10 298546 A (TOSHIBA CORP; TOSHIBA ELECTRON ENG CORP), 10 novembre 1998 (1998-11-10) * |
VILLALOBOS G R ET AL: "Protective silica coatings on zinc-sulfide-based phosphor particles" JOURNAL OF THE AMERICAN CERAMIC SOCIETY AMERICAN CERAMIC SOC USA, vol. 85, no. 8, août 2002 (2002-08), pages 2128-2130, XP002310882 ISSN: 0002-7820 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007044711A1 (fr) * | 2005-10-07 | 2007-04-19 | University Of Florida Research Foundation, Inc. | Nanoparticules a composants multiples pour signalisation multiplexee et codage optique |
US8168447B2 (en) | 2005-10-07 | 2012-05-01 | University Of Florida Research Foundation, Inc. | Multiple component nanoparticles for multiplexed signaling and optical encoding |
Also Published As
Publication number | Publication date |
---|---|
US20060289832A1 (en) | 2006-12-28 |
JP2007527440A (ja) | 2007-09-27 |
WO2005001872A3 (fr) | 2005-02-17 |
EP1644660A2 (fr) | 2006-04-12 |
KR20060017882A (ko) | 2006-02-27 |
US7329983B2 (en) | 2008-02-12 |
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