WO2006025403A1 - Element electroluminescent de type dispersif - Google Patents

Element electroluminescent de type dispersif Download PDF

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Publication number
WO2006025403A1
WO2006025403A1 PCT/JP2005/015790 JP2005015790W WO2006025403A1 WO 2006025403 A1 WO2006025403 A1 WO 2006025403A1 JP 2005015790 W JP2005015790 W JP 2005015790W WO 2006025403 A1 WO2006025403 A1 WO 2006025403A1
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Prior art keywords
layer
light
dielectric
particles
wavelength conversion
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PCT/JP2005/015790
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English (en)
Japanese (ja)
Inventor
Tadanobu Sato
Takafumi Noguchi
Koji Kawato
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Fujifilm Corporation
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Publication of WO2006025403A1 publication Critical patent/WO2006025403A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
    • H05B33/145—Arrangements of the electroluminescent material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/22—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers

Definitions

  • the present invention relates to a dispersive electoluminescent device having a light emitting particle layer in which an electroluminescent phosphor powder is dispersedly applied.
  • Electric mouth luminescence (hereinafter also referred to as "EL") phosphors are voltage-excited phosphors, and are used as distributed EL devices in which phosphor powder is sandwiched between electrodes to form a light-emitting device. It is known.
  • the general shape of a dispersion-type EL device is a structure in which phosphor powder is dispersed in a high-dielectric-constant inductor and is sandwiched between two electrodes, at least one of which is transparent. Light is emitted by applying an alternating electric field between the electrodes.
  • An EL device which is a light emitting device made using phosphor powder, can be made to a thickness of 1 mm or less, and since it does not use a high-temperature process in the manufacturing process, it is a flexible and lightweight device using a plastic substrate. Since it has many advantages such as being capable of being formed, being able to be manufactured at a low cost with a relatively simple process without using a vacuum device, and being a surface light emitter, a backlight such as an LCD, It can be applied to display elements, and can be used as road signs, lighting for various interiors and exteriors, light sources for flat panel displays such as liquid crystal displays, and illumination light sources for large areas.
  • Dispersion type EL elements that have been proposed to emit white light have a light emission waveform in which light emission intensity is concentrated mainly in two wavelength regions of blue-green and orange to red.
  • a rhodamine-based compound was placed in a light emitting particle layer to form a white light emitting EL.
  • Patent Document 1 Japanese Patent Laid-Open No. 60-25195
  • Patent Document 2 JP-A-60-170194
  • Patent Document 3 Japanese Patent Laid-Open No. 2-78188
  • an object of the present invention is to obtain a dispersive EL element that emits white light and has excellent color rendering (particularly red).
  • the present invention can be realized by the following means.
  • a luminescent particle layer and a dielectric layer are provided between the two electrodes.
  • the content ratio of the wavelength conversion material is 1% by mass or more and 20% by mass or less with respect to the dielectric particles, and the thickness of the dielectric layer is 1 m or more and 25 ⁇ m or less.
  • Toss The electroluminescent device according to (10) above.
  • the maximum wavelength of light emission of the wavelength conversion material is 550 nm or more and 650 nm or less, and the content ratio of the wavelength conversion material is 1% by mass or more and 20% by mass or less with respect to the dielectric particles,
  • the electret luminescence device according to any one of (10) to (13), wherein the dielectric layer has a thickness of 1 ⁇ m to 25 m.
  • the EL element of the present invention is particularly excellent in red color rendering than the conventional EL element.
  • the color rendering property of skin color is greatly improved in the EL device of the present invention.
  • the ideal white light-emitting light source emits uniform light intensity at any wavelength in the visible range. In this case, the color rendering properties are the best.
  • dispersive inorganic EL for example, two large emission bands, namely, electroluminescence (blue-green) of phosphor particles and long-wave emission (orange to red) by a wavelength conversion material that absorbs the light emitted from the phosphor particles. Therefore, how much light is emitted in the vicinity of the wavelength that can best recognize blue, green, and red colors for human vision is a problem.
  • the shape is a shape included in a certain range.
  • the emission spectrum can generally be approximated by a Lorentz type, Gaussian type, or a linear combination type or a point type distribution function thereof.
  • Gaussian distribution function S ( ⁇ ) is expressed by the following equation.
  • ⁇ represents a measurement wavelength
  • ⁇ represents a peak height (intensity)
  • u represents a peak wavelength
  • w represents a value of 1Z 2 having a half width.
  • the EL emission spectrum ⁇ ( ⁇ ) of the dispersive EL element is S (
  • ⁇ ) can be expressed as a sum of S ( ⁇ ), and I ( ⁇ ) is a linear combination of S ( ⁇ ).
  • the dispersive EL has two types of luminous power, ie, electroluminescence of phosphor particles and long-wave emission by a wavelength conversion material that absorbs light emitted from the phosphor particles. These emissions give blue-green light and red light.
  • blue-green light emission it is ideal to have a light emission band that stimulates human blue and green sights evenly, with a peak at 490 nm and a single Gaussian distribution. It is ideal that the light emission band be expressed by (having an equal energy distribution centered on 490 nm). Even if it emits red light,
  • the red light emission is preferably expressed as a function of the sum of a Gaussian distribution having a peak at a short wave slightly shorter than 6 lOnm and a Gaussian distribution having a peak at a longer wave and a large half-value width.
  • the intensity ratio of the blue-green and red light-emitting bands or the blue-green, green and red light-emitting bands can be determined within a certain range.
  • the upper limit function f ( ⁇ ) of the spectrum is
  • I ( ⁇ ) obtained by normalizing the spectrum actually measured is in the range of 400 nm to 700 nm which is effective as a spectrum.
  • This invention is referred to as the first invention in this specification.
  • ⁇ ( ⁇ ) is always 1 (e) or more and g () or more and ⁇ ( ⁇ ) or less in a section of 400 nm or more and 700 nm or less.
  • g ( ⁇ ) ⁇ ( ⁇ ) ⁇ ( ⁇ ) may not be satisfied in the wavelength range where the color rendering properties and whiteness are hardly affected, such as the end of the spectrum. For example, even if the shape is cut by absorption of the sealing film covering the outside of the L element, the color rendering property may not be greatly affected.
  • g ( ⁇ ) ⁇ ⁇ ( ⁇ ) ⁇ ⁇ ( ⁇ ) is preferably in the range of 400 nm to 700 nm, but it should be at least 410 nm to 650 nm. This latter invention is referred to as the second invention in this specification.
  • the maximum value on the long wave side from the minimum value is 600 nm or more, which is derived from the fact that the red emission wavelength of the EL element approaches the human red visibility.
  • ⁇ ( ⁇ ) the maximum value on the longer wave side than the minimum value is It is preferable that ⁇ ( ⁇ ) ⁇ 0.95.
  • the color temperature at the time of light emission of the EL element obtained by the spectrum represented by ⁇ ( ⁇ ) is preferably 3500 ° C or more and 85OOK or less, more preferably 5000K or more and 8000K or less.
  • the preferable values of X and y on the chromaticity coordinates are forces that are each in the range of 0.25 force to 0.45, more preferably both are included in the range of 0.28 to 0.40. It is to be.
  • Dispersion EL has the advantage that the spectrum shape can be easily adjusted by mixing a plurality of phosphor particles having different emission colors or using a plurality of wavelength conversion materials.
  • Phosphor particles preferably used in the present invention are particles prepared by various preparation methods such as firing by mixing a base material, an activator, and, if necessary, a coactivator.
  • the matrix material used in this case is specifically composed of one or more elements selected from group II elements and group VI elements, and group III elements and group V elements. It is a semiconductor fine particle composed of one or more elements selected from the group consisting of, and is arbitrarily selected according to a necessary emission wavelength region. Examples thereof include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, CaS, MgS, SrS, GaP, GaAs, and mixed crystals thereof. ZnS, CdS, CaS, and the like can be preferably used. Furthermore, the base material of the particles includes BaAlS, CaGaS, GaO, ZnSiO, ZnGaO, ZnGaO, ZnGeO, ZnGeO, ZnGeO, ZnGeO, Zn
  • metal ions such as Mn and Cu and rare earth elements can be preferably used.
  • halogen elements such as CI, Br, and I, A1 and the like can be preferably used. Furthermore, in the present invention, it is more preferable to use the following phosphor particles.
  • Phosphor particles having an average particle size of 0.1 ⁇ m or more and 20 m or less and having multiple twin structures inside the particles and having 10 or more layers at intervals of 5 nm or less in one particle .
  • the phosphor particles usable in the present invention can be formed by a firing method (solid phase method) widely used in the industry.
  • a firing method solid phase method
  • a fine particle powder usually called raw powder
  • a crystallite size in the range of 10 nm to 50 nm
  • an activator in the case of zinc sulfate, a fine particle powder (usually called raw powder) with a crystallite size in the range of 10 nm to 50 nm is prepared by the liquid phase method, and this is used as a primary particle, which is called an activator.
  • Impurities are mixed, and particles are obtained by first firing in a crucible with a flux at a high temperature in the range of 900 ° C to 1300 ° C for 30 minutes to 10 hours.
  • the intermediate phosphor powder obtained by the first firing is repeatedly washed with ion exchange water to remove alkali metal, alkaline earth metal, excess activator, and coactivator.
  • second baking is performed on the obtained intermediate phosphor powder.
  • heating annealing
  • heating is performed at a temperature lower than that of the first baking in the range of 500 ° C. to 800 ° C. and in a short time of 30 minutes to 3 hours.
  • the density of stacking faults without breaking the particles can be greatly increased.
  • a method of applying impact force a method of contacting and mixing particles of the intermediate phosphor powder, a sphere such as alumina, etc.
  • a method of mixing and mixing (ball mill), a method of accelerating and colliding particles, a method of irradiating ultrasonic waves, and the like can be preferably used.
  • etching is performed with an acid such as HC1 to remove metal oxides adhering to the surface, and copper sulfide adhering to the surface is removed by washing with KCN and dried to obtain phosphor particles.
  • a method for forming phosphor particles usable in the present invention it is preferable to use a hydrothermal synthesis method, a urea melting method, or a spray pyrolysis method. Further, a laser 'ablation method, a CVD method is used. Gas phase methods such as methods combining plasma, chemical vapor deposition, sputtering, resistance heating, electron beam method, fluid oil surface deposition, metathesis method, precursor thermal decomposition method, reverse micelle method It can also be formed by using a method combining calcination with high temperature and a liquid phase method such as freeze-drying.
  • the luminescent particle layer can be formed by applying a coating solution containing EL phosphor particles.
  • the EL phosphor particle-containing coating solution is a coating solution containing at least EL phosphor particles, a binder, and a solvent that dissolves the binder.
  • binders include polymers having a relatively high dielectric constant such as cyanoethyl cellulose resin, polyethylene, polypropylene, polystyrene resin, silicone resin, epoxy resin, and vinylidene fluoride. It is preferable to use fat. To these binders, fine particles with high dielectric constant such as BaTiO and SrTiO
  • the dielectric constant can be adjusted by mixing 5 to 50 parts by mass with respect to 100 parts by mass of the binder.
  • a dispersion method a homogenizer, a planetary kneader, a roll kneader, an ultrasonic disperser, or the like can be used.
  • the solvent any solvent having a high polarity can be used without limitation, and alcohols, ketones, esters, polyhydric alcohols and derivatives thereof, plasticizers, and the like can be preferably used.
  • the viscosity of the coating solution containing EL phosphor particles at room temperature is preferably in the range of 0.1 lPa's or more and 10. OPa's or less. 0.3 or more Pa's or more 8. The range of OPa's or less More preferable 1. OPa-s or more 6. OPa's or less is particularly preferable. If the viscosity of the coating solution containing EL phosphor particles is within the above-mentioned range, coating film thickness unevenness hardly occurs, and phosphor particles do not separate and settle with the passage of time after dispersion. It is also possible to apply with the above method.
  • the viscosity is a value measured at 20 ° C. which is the same as the coating temperature.
  • the luminescent particle layer is made of a transparent material such as a slide coater or an etrusion coater. It is preferable to apply continuously on a plastic support or the like provided with a bright electrode so that the dry film thickness of the coating film is in the range of 0.5 m or more and 6 O / zm or less. At this time, the film thickness variation of the luminescent particle layer is preferably 12.5% or less, particularly preferably 5% or less.
  • the filling rate of the phosphor particles in the luminescent particle layer is not limited !, but is preferably in the range of 60% by mass to 95% by mass, more preferably in the range of 75% by mass to 85% by mass. It is.
  • the uniformity of the coating film thickness of the luminescent particle layer is improved, and the smoothness of the coating film surface is simultaneously achieved. improves. Furthermore, when the number of particles per unit area is greatly increased, fine light emission unevenness can be remarkably improved.
  • the decrease in the particle size leads to an increase in the applied voltage of the phosphor particles, and in addition to an increase in the electric field strength to the luminescent particle layer due to the thinner luminescent particle layer, it is favorable for improving the luminance of the EL element. It is also preferable for suppressing vibrations that cause noise.
  • Examples of the wavelength conversion material preferably used in the present invention include fluorescent pigments and fluorescent dyes.
  • these compounds that form these luminescent centers compounds having rhodamine, latathone, xanthene, quinoline, benzothiazole, triethylindoline, perylene, triphennin, and dicyanomethylene as skeletons are preferred, as well as cyanine dyes. It is also preferable to use an azo dye, a poly-ethylene bi-ylene polymer, a disilane oligo-chelen polymer, a ruthenium complex, a europium complex, or an erbium complex. These compounds may be used alone or in combination.
  • these compounds may be used as a wavelength conversion material after further being dispersed in a polymer or the like.
  • those having the maximum value of the emission spectrum in the range of 550 ⁇ m to 650 nm are preferred, more preferably those having the emission maximum in the range of 600 nm to 650 nm, particularly preferably 61 Onm force and 630 nm. It has a light emission maximum in the range.
  • the EL device of the present invention preferably has a layer containing these wavelength conversion materials. These wavelength conversion materials can be contained in the luminescent particle layer and the Z or dielectric layer, and are preferably contained in the dielectric layer.
  • the EL element of the present invention may have a wavelength conversion material-containing layer containing a plurality of dielectric layers and containing a wavelength conversion material at a position sandwiched between the two dielectric layers. Furthermore, these wavelength conversion material-containing layers are not provided between the transparent electrode and the back electrode, and as a wavelength conversion film layer on the outside of the transparent electrode and the back electrode. It is also preferable to have it.
  • the wavelength conversion material-containing layer may be provided around the luminescent particle layer, between the luminescent particle layer and the transparent electrode, or between the luminescent particle layer and the dielectric layer. It is also possible to install in the position.
  • the wavelength conversion material is contained in the dielectric layer, or that the wavelength conversion material layer is disposed at a position sandwiched between the two dielectric layers.
  • the wavelength converting material is a material that absorbs light emitted from the phosphor particles contained in the light emitting particle layer and emits light having a longer wavelength than the light emitted from the phosphor particles
  • the wavelength converting material is used at these positions. It is preferable. That is, when the material performs wavelength conversion, if there is an overlap in wavelength between the emission band of the wavelength conversion material and the absorption band of the material, the light itself will be absorbed, Apparently, the shape on the short wave side of the emission band changes, and it is observed that no light is emitted.
  • the position of the light emission maximum of the material can be changed by changing the way light is applied to the material without changing the wavelength conversion material, and by changing the amount of light absorption of the material.
  • the emission maximum wavelength (red emission maximum wavelength) of the wavelength conversion material can be adjusted to a desired wavelength.
  • an EL device having a light emitting particle layer, a light scattering layer, a wavelength conversion material layer, and a dielectric layer in this order between a transparent electrode and a back electrode is more preferable. More preferably, an EL element having a luminescent particle layer, a light scattering layer, a wavelength conversion material layer, and a dielectric layer in this order from the transparent electrode side between the transparent electrode and the back electrode is used.
  • the light scattering layer can be formed of the same material as the dielectric layer, and is preferably provided as a thin dielectric layer under the light emitting particle layer.
  • the light scattering function by the light scattering layer located on the light emitting particle layer side from the wavelength conversion material layer, and the lower side of the wavelength conversion material layer that is, the back electrode side, the wavelength conversion material.
  • the light scattering state around the wavelength conversion material layer can be controlled by the light reflecting function of the dielectric layer located on the opposite side of the light scattering layer across the layer.
  • the light incident from the light emitting particle layer is subjected to multiple reflection Z multiple scattering, and this light is absorbed by a wavelength conversion material such as a pigment in the wavelength conversion material layer, thereby
  • the emission wavelength can be controlled by increasing the self-absorption of the material, controlling the degree of the increase, and adjusting the red emission maximum wavelength to a desired wavelength.
  • the light scattering layer The light incident from the light emitting particle layer is subjected to multiple reflection Z multiple scattering between the light emitting layer and the dielectric layer, and the light emitted from the light emitting particle layer is emitted from the light emitting particle layer by the light. Can be kept to a minimum by absorption of
  • the thickness of the light scattering layer is thinner than the thickness of the dielectric layer.
  • the thickness of the light scattering layer is preferably 1 ⁇ m or more and 10 ⁇ m or less.
  • the light scattering layer contains particles capable of obtaining white reflection with a high visible light reflectance.
  • Such materials are selected from sulfates, metal oxides, nitrides, for example MgS
  • the particles used in the light scattering layer are preferably dielectrics.
  • Examples of the dielectric particles used in the light scattering layer include dielectric particles used in the dielectric layer described later.
  • the light scattering layer is a dielectric
  • the light scattering layer can be formed in the same manner as the dielectric layer.
  • the average size of the particles used in the light-scattering layer is an average particle size, preferably not more than 0. m, more preferably not less than 0.01 ⁇ m but not more than 0.5 ⁇ m, most preferably not more than 0 ⁇ m. .05 ⁇ m or more and 0.5 m or less. From the viewpoint of reducing the thickness of the light scattering layer, it is also preferable to use a mixture of dielectric particles having different particle sizes. For example, the average particle size is an average particle size of 0 .: m or more and 0.5 m or less.
  • particles also referred to as large size particles
  • particles having an average particle size of 0.01 ⁇ m or more and less than 0.1 ⁇ m may be mixed. preferable.
  • the average particle size is measured with HORIBALA-920, and is measured when the light transmittance of the measurement sample is 94.5% to 95.4%.
  • the wavelength at which incident light is received from the light emitting particle layer By setting the thickness of the light scattering layer in the above range, and setting the average size of the dielectric particles used in the light scattering layer in the above range, the wavelength at which incident light is received from the light emitting particle layer. Light emitted from the pigment or the like in the conversion material layer passes through the light scattering layer and is suitably emitted outside the EL element.
  • the thickness of the wavelength conversion material layer is preferably 3 m or more and 20 m or less. More preferably, it is 3 ⁇ m or more and 15 m or less.
  • the concentration of the material in the wavelength conversion material layer is possible As high as possible is preferable. In other words, it is particularly preferable that the wavelength conversion material layer also has a force only for the wavelength conversion material. “Substantially” means that the concentration of the wavelength converting material in the wavelength converting material layer is 50 mass% to 100 mass%.
  • the wavelength conversion material layer it is preferable to form the material layer without using a binder. It is preferable that the wavelength converting material is contained in the coating solution and applied. As a dispersion solvent for the wavelength conversion material contained in the coating solution, when a pigment is used for the wavelength conversion material, the pigment used does not dissolve, or the solvent penetrates into the pigment and the fluorescence in the pigment penetrates. It is preferable to use a solvent so that the substance does not elute.
  • hydrocarbons such as hexane and toluene
  • alcohols having 3 or more carbon atoms in the main chain such as cyclohexanol and 2-ethylhexanol
  • glycerin glycerin
  • ethylene glycol ethylene glycol
  • plasticizers such as polyhydric alcohols, halogenated hydrocarbons such as carbon tetrachloride, dioctyl adipate, and dioctyl sebacate.
  • plasticizers such as polyhydric alcohols, halogenated hydrocarbons such as carbon tetrachloride, dioctyl adipate, and dioctyl sebacate.
  • a wavelength conversion material in the dielectric layer. More preferably, an EL element having a light emitting particle layer and a dielectric layer containing a wavelength conversion material in this order between a transparent electrode and a back electrode is used. More preferably, the EL element has a light emitting particle layer and a dielectric layer containing a wavelength conversion material in this order from the transparent electrode side between the transparent electrode and the back electrode. As in the case of providing the light scattering layer described above, a wavelength conversion material is placed in a portion where the light scattering is large, and the apparent maximum wavelength of the wavelength conversion material is lengthened by the effect of multiple reflection Z multiple scattering. Is intended.
  • the dielectric particles may be formed using any material as long as the dielectric material has a high dielectric constant and a high reflectance. I can do it.
  • Such materials are selected from metal oxides and nitrides, for example TiO, BaTiO
  • binders include polymers having a relatively high dielectric constant such as cyanoethyl cellulose resin, polyethylene, polypropylene, polystyrene resin, silicone resin, epoxy resin, vinylidene fluoride, and the like. Fat is preferred.
  • a dispersion method of the dielectric material it is preferable to disperse using a homogenizer, a planetary kneader, a roll kneader, an ultrasonic disperser, or the like.
  • the dielectric layer that also serves as the wavelength conversion material layer is preferably 1 m force to 25 ⁇ m, more preferably 5 ⁇ m force to 20 ⁇ m.
  • the preferred concentration of the wavelength conversion material when the dielectric particles are mixed with the wavelength conversion material is 1% by mass to 20% by mass, more preferably 2% by mass to 10% by mass with respect to the dielectric particles. .
  • the EL element More preferably, there are two dielectric layers contained in the EL element, one layer being a dielectric layer containing a wavelength converting material and the other layer being a dielectric layer not containing a wavelength converting material.
  • either layer may be placed on the back electrode side.
  • the dielectric layer containing the wavelength conversion material is on the luminescent particle layer side, and the dielectric layer not containing the wavelength conversion material is on the back electrode side. It is to install in each.
  • the layer thickness of the layer containing the wavelength conversion material is made as thin as possible, and the wavelength in the layer is reduced. Increasing the concentration of the conversion material is also a preferable means.
  • the thickness of the conversion film layer is 0.5 ⁇ m or more and 20 ⁇ m or less, and the concentration of the wavelength conversion material in the layer is preferably 30% by mass to 100% by mass. ⁇ m or more and 15 ⁇ m or less, and material concentration is 40% or more and 100% or less by mass.
  • This layer can be formed using a binder.
  • the noinder any binder having a high light transmittance can be used. It is also preferable to use a binder used in the luminescent particle layer or dielectric layer in the present invention. High dielectric constant, no need to use polymer, It is also preferable to use olefin resin, such as acrylic resin.
  • phosphor particles that emit red light that is not as strong as the wavelength conversion material can be used as the red light-emitting material.
  • the phosphor that emits red light calcium sulfide, strontium sulfide, or a phosphor in which europium or the like is activated using a mixed crystal thereof as a base is preferably used.
  • These red light emitting materials are preferably contained in a light emitting particle layer that emits blue-green light, placed between the light emitting particle layer and the transparent electrode, or between the light emitting particle layer and the dielectric layer. When formed as a layer different from the light emitting particle layer, it can be formed in the same manner as the light emitting particle layer.
  • the dielectric layer preferably includes dielectric particles.
  • the dielectric particles suitably used for the dielectric layer and the light scattering layer are dielectric materials having a high dielectric breakdown voltage and a high dielectric breakdown voltage with high dielectric constant and insulation properties.
  • Any dielectric material can be used as long as it has a constant rate.
  • Such materials are selected from metal oxides and nitrides, such as TiO, BaTiO, SrTiO, Pb
  • the average size of the particles used in these dielectric layers is preferably an average particle size of ⁇ to 2.0 ⁇ m or less, more preferably ⁇ to 0.01 ⁇ m to 1.0 ⁇ m, most preferably 0. .05 111 or more and 0.5 / zm or less.
  • These dielectric materials are preferably dispersed in the binder.
  • binders include polymers with relatively high dielectric constants such as cyanoethyl cellulose resin, polyethylene, polypropylene, polystyrene resin, silicone resin, epoxy resin, and vinylidene fluoride. A cocoa is preferred.
  • As a dispersion method of the dielectric material it is preferable to disperse using a homogenizer, a planetary kneader, a roll kneader, an ultrasonic disperser, or the like.
  • the dielectric layer is preferably set as a uniform film or a film having a particle structure. A combination thereof may also be used. “The film is uniform” means that the dielectric layer itself is an amorphous layer or a layer having a crystal structure, and examples of the uniform film include a thin film crystal layer.
  • a vapor phase method such as sputtering or vacuum deposition is preferably exemplified.
  • the thickness of the dielectric layer is preferably in the range of 0.1 ⁇ m to 10 ⁇ m.
  • the EL device of the present invention may have one or more dielectric layers.
  • the dielectric layer may be provided on one side of the luminescent particle layer or on both sides of the luminescent particle layer.
  • the dielectric layer on the transparent electrode side may be a film having a particle structure or a dielectric layer consisting only of a high dielectric constant binder.
  • the dielectric layer is formed by coating, it is preferable to use a slide coater or an etatrusion coater as in the case of the luminescent particle layer.
  • a thin film crystal layer it may be a thin film formed on a substrate by a vapor phase method such as sputtering, or a sol-gel film using an alkoxide such as Ba or Sr.
  • the dielectric layer is preferably formed by applying a coating solution containing dielectric particles.
  • the dielectric particle-containing coating solution is a coating solution containing at least dielectric particles, a binder, and a solvent that dissolves the binder.
  • the binder and the solvent are the same as those used for the light emitting particle layer.
  • the viscosity of the coating solution containing dielectric particles at normal temperature is preferably in the range of 0. OlPa's to lOPa's, more preferably in the range of 0.08 Pa's to 8. OPa's. Particularly preferably, it is in the range of 1. OPa's to 6. OPa's. If the viscosity of the coating solution containing dielectric particles is within the above range, the coating film thickness unevenness is difficult to occur, and the dielectric particles do not separate and settle with the passage of time after dispersion. Application is also possible and preferable.
  • the viscosity is a value measured at 20 ° C. which is the same as the coating temperature.
  • the transparent electrode used in the EL device of the present invention an electrode formed using any commonly used transparent electrode material is used.
  • transparent electrode materials include tin oxides such as tin-doped oxide tin, antimony-doped tin oxide, and zinc-doped oxide oxide tin, a multilayer structure in which a silver thin film is sandwiched between high refractive index layers, and poly-phosphorus. And ⁇ -conjugated polymers such as polypyrrole.
  • a metal wire such as a comb or grid to improve the conductivity.
  • the specific resistivity of the transparent electrode is preferably in the range of 0.01 ⁇ to 30 ⁇ .
  • the back electrode is the side from which light is not extracted, and any conductive material can be used.
  • it can be selected from metal such as gold, silver, platinum, copper, iron, and aluminum, graphite, etc. according to the form of the element to be created, the temperature of the creation process, etc. Conductivity If possible, you can use transparent electrodes such as ITO.
  • a conductive material-containing coating solution in which the conductive fine particle material is dispersed together with a binder is prepared and applied using a slide coater or an etatrusion coater. You can also
  • a transparent electrode on a support.
  • a support any support that is flexible and highly transparent can be used without limitation.
  • Each functional layer coated on the support is preferably formed as a continuous process including at least a coating step and a drying step.
  • the drying process is divided into a constant rate drying process until the coating film is dried and solidified, and a decreasing rate drying process for reducing the residual solvent of the coating film.
  • Benard cell is likely to occur, and pre-expansion due to rapid solvent expansion. Star failure is likely to occur, and the uniformity of the coating is significantly impaired.
  • the drying process is performed slowly at a constant rate, and is performed at a temperature sufficient for the solvent to dry.
  • a method for carrying out the constant rate drying process gently it is preferable to divide the drying chamber where the support travels into several zones and gradually increase the drying temperature after completion of the coating process.
  • the light emitting particle layer may be subjected to a force render process using a calendar processor.
  • the smoothness of both main surfaces of the luminescent particle layer formed by calendering is preferably in the range of 0.5 m or less, more preferably 0.2 m or less.
  • the calendar processor to be used is not particularly limited, and can be appropriately selected from among the known devices. A pair of rolls, at least one of which is heated to, for example, 50 ° C to 200 ° C In the meantime, a smoothing process is performed by passing a luminescent particle layer in which phosphor particles are dispersed in a binder while applying pressure as an object.
  • the heating temperature of the calender roll is preferably higher than the softening temperature of the binder contained in the light emitting particle layer.
  • the calendar pressure and the conveying speed are not necessary to destroy the phosphor particles or extend the luminescent particle layer more than necessary. It is preferable to select appropriately so that the degree can be obtained.
  • the conductive material described above can also be used when providing a compensation electrode to suppress vibration of the EL element.
  • a compensation electrode when a compensation electrode is provided outside the transparent electrode from which light is extracted, an oxide such as tin-doped tin oxide, antimony-doped tin oxide, or zinc-doped ichtin tin, or a silver thin film is formed with a high refractive index layer.
  • transparent electrode materials such as sandwiched multilayer structures, ⁇ -conjugated polymers such as polyaline and polypyrrole.
  • any conductive material such as metal such as gold, silver, platinum, copper, iron, and aluminum, or graphite is used.
  • a transparent electrode such as a bag may be used as long as it has conductivity.
  • the compensation electrode is attached to the transparent electrode and the back electrode through an insulating layer.
  • the insulating layer material is an insulating inorganic material or polymer material, a dispersion liquid in which inorganic material powder is dispersed in a polymer material, or the like. Can be formed by vapor deposition or coating.
  • a conductive material-containing coating solution in which the conductive fine particle material is dispersed together with a binder can be prepared and applied using a slide coater or an etatrusion coater.
  • an insulating material-containing coating solution in which the insulating material is dispersed together with a binder can be prepared and applied simultaneously with the conductive material-containing coating solution.
  • a voltage is applied to the compensation electrode provided from the driving power source, and at this time, the vibration generated in the luminescent particle layer can be canceled by setting the phase opposite to that of the voltage applied to the luminescent particle layer.
  • the compensation electrode has the same effect even if it is attached to either the outer side of the transparent electrode or the outer side of the back electrode with an insulating layer sandwiched between them.
  • the dielectric constant of the light emitting particle layer (the light emitting particle layer and the dielectric layer, if a dielectric layer is provided) and the dielectric constant of the insulating layer inside the compensation electrode are substantially equal. This is preferable for effective suppression.
  • a buffer layer used for the EL element As another method for suppressing vibration of the EL element, a buffer layer used for the EL element is provided.
  • a polymer material having a high impact absorbing ability or a polymer material foamed by adding a foaming agent as the buffer material layer.
  • the polymer material having high impact absorbing ability include natural rubber, styrene butadiene rubber, polyisoprene rubber, polybutadiene rubber, nitrile rubber, chloroprene rubber, butyl rubber, hibaron, silicon rubber, urethane rubber, ethylene propylene rubber, and fluorine rubber. Etc. can be used.
  • the hardness of these polymer materials is preferably 50 or less, more preferably 30 or less, from the viewpoint of vibration absorption ability.
  • butyl rubber, silicon rubber, fluororubber, and the like are more preferable because they have a low water absorption and function as a protective film for protecting the EL element from moisture.
  • the buffer material layer using these buffer materials can be attached by adhering the buffer material layer to the EL element with an adhesive, but the buffer material is dissolved in a solvent to prepare a buffer material-containing coating solution, It can also be applied using a slide coater or an etrusion coater.
  • the thickness of the buffer layer depends on the hardness of the polymer material, it needs to be 20 ⁇ m or more and preferably 50 ⁇ m or more in order to sufficiently absorb vibration. If it exceeds 200 ⁇ m, the thickness of the element increases greatly, which is not preferable in terms of mass and flexibility. Further, the combined use of the compensation electrode and the buffer layer is preferable because it can further suppress vibration.
  • the dispersion-type EL element of the present invention is preferably processed so as to eliminate the influence of humidity and oxygen from the external environment using a sealing film.
  • Sealing the fill arm for sealing the EL element, and more preferably not more than 40 ° C-water vapor permeability at 90% RH is preferably is 0. 05gZm 2 Zday following instrument 0. 01gZm 2 Zday. Further oxygen permeability at 40 ° C- 90% RH 0. Lcm 3 Zm 2 ZdayZatm is preferably less instrument 0. 01cm 3 Zm 2 ZdayZatm less and more favorable preferable.
  • a sealing film a laminated film of an organic film and an inorganic film is preferably used.
  • polyethylene-based resin, polypropylene-based resin, polycarbonate-based resin, polyvinyl alcohol-based resin, and the like are preferably used, and particularly, polyvinyl alcohol-based resin is more preferably used. be able to. Since polyvinyl alcohol resins and the like have water absorption properties, it is more preferable to use those that have been completely dried by intensive treatment such as vacuum heating. A sheet form by applying such resin. An inorganic film is deposited on the processed material by vapor deposition, sputtering, CVD method or the like.
  • the inorganic film to be deposited silicon oxide, silicon nitride, silicon oxynitride, acid silicate, zinc oxyaluminum, aluminum nitride or the like is preferably used.
  • the formation of the organic film and the inorganic film is repeated, or the organic film deposited with the inorganic film is used as the adhesive layer. It is preferable to laminate a plurality of films through a multi-layer film.
  • the thickness of the organic material film is preferably in the range of 5 m to 300 m, more preferably in the range of 10 m to 200 m.
  • the thickness of the inorganic film is preferably in the range of lOnm or more and 300 nm or less, and more preferably in the range of 20 nm or more and 200 nm or less.
  • the film thickness of the laminated sealing film is preferably in the range of 30 m to 1000 m, more preferably in the range of 50 ⁇ m to 300 ⁇ m.
  • two layers of the above organic film and inorganic film are laminated. With the construction as described above, a force of 50 ⁇ : L00 ⁇ m is sufficient.
  • Polyethylene trifluoride chilled titanium used as a sealing film conventionally requires a film thickness of 200 m or more. The thinner the sealing film, the better in terms of light transmission and device flexibility.
  • the sealing film is folded in half and sealed.
  • the part where the films overlap may be adhesively sealed.
  • the EL cell sealed with the sealing film only the EL cell may be prepared separately, or the EL cell may be directly formed on the sealing film. In this case, the support can be used instead.
  • the sealing step is preferably performed in a dry atmosphere with vacuum or dew point control.
  • a desiccant layer around the EL cell.
  • the desiccant used in the desiccant layer alkaline earth metal oxides such as CaO, SrO, BaO, acid aluminum, zeolite, activated carbon, silica gel, paper and highly hygroscopic resin are preferably used.
  • alkaline earth metal oxides are more preferable in terms of moisture absorption performance.
  • These hygroscopic agents can be used even in powder form.
  • the hygroscopic agent can be used by mixing it with a resin material and processing it into a sheet by coating or molding.
  • a desiccant layer by applying a coating liquid mixed with a fat material around the EL element using a dispenser or the like. Furthermore, it is more preferable to cover not only the periphery of the EL cell but also the lower and upper surfaces of the EL cell with a desiccant. In this case, it is preferable to select a highly transparent desiccant layer for the light extraction surface.
  • a highly transparent desiccant layer polyamide-based resin can be used as the highly transparent desiccant layer.
  • FIG. 1 is a schematic view of one embodiment of an EL device of the present invention.
  • FIG. 2 A diagram showing the relationship between the emission spectrum (A. U. stands for normalized intensity) of each EL element of the normalized comparative example and f (e) and g ( ⁇ ).
  • FIG. 3 is a diagram showing the relationship between the emission spectrum (A. U. stands for normalized intensity) of each EL element of the present invention normalized, and f (e) and g ( ⁇ ).
  • the aluminum sheet coated with a dielectric layer is coated on a 75 ⁇ m thick aluminum sheet so that the layer thickness is 30 ⁇ m and dried at 110 ° C. for 5 hours. Obtained.
  • This coated product is thermocompression-bonded with a film of 100 ⁇ m thick polyethylene terephthalate with a spider sprinkled uniformly to a thickness of 40 nm using a sputter, and a lead piece is placed and sealed with a moisture-proof film.
  • the EL element of Example 1 was used.
  • a red pigment (Sinloihi FA-007) manufactured by Sinloihi to 8% of the BaTiO mass
  • an EL device (2) according to the present invention was obtained in the same manner as the method for producing an EL device (1) according to the present invention.
  • This coated material was thermocompression bonded with a film in which ITO was uniformly deposited to a thickness of 40 nm on a 100 m thick polyethylene terephthalate by sputtering. Finally, a lead piece was placed and sealed with a moisture-proof film between them to make an EL element (3) according to the present invention.
  • the Xia Bruno ethylcellulose solution ⁇ I ⁇ lead particles and 30 mass 0/0 having an emission maximum at 498nm with an average particle size was activated with copper and chlorine 15 m 1.
  • ITO was applied onto polyethylene terephthalate having a thickness of 100 ⁇ m by sputtering so that the luminous particle layer had a thickness of 45 m on a film having a uniform thickness of 40 nm.
  • the coated material was dried at 110 ° C. for 5 hours using a hot air dryer, and then a solution in which BaTiO fine particles having an average particle size of 0.2 ⁇ m were dispersed in a 30 mass% cyanoethyl cellulose solution was prepared.
  • This layer was applied to a thickness of 3 m and dried at 110 ° C. for 5 hours to form a light scattering layer.
  • a layer was formed.
  • the coated product thus obtained has an average particle size of 0.2. dispersed ⁇ particles 30 mass 0/0 Xia Bruno ethylcellulose solution of BaTiO 3 m, the induction
  • An EL element (4) according to the present invention was obtained by mounting a lead piece on the EL sheet obtained as described above and sealing it with a moisture-proof film sandwiched between them.
  • the aluminum sheet coated with a dielectric layer is coated on a 75 ⁇ m thick aluminum sheet so that the layer thickness is 30 ⁇ m and dried at 110 ° C. for 5 hours. Obtained. Subsequently, the average particle size Xia Bruno ethylcellulose solution ⁇ I ⁇ zinc particles and 30 mass 0/0 with an emission maximum copper and chlorine 15 m to 498nm was activated 1.2: mixed • 1 ratio After the dispersion, it was coated on the aluminum sheet coated with the dielectric layer so that the thickness of the luminescent particle layer was 45 m. This coating was dried at 110 ° C. for 5 hours using a hot air dryer.
  • a film in which ⁇ is evenly deposited to a thickness of 40 nm on polyethylene terephthalate with a thickness of 100 ⁇ m by sputtering is placed on the surface opposite to the one on which ITO is sputtered.
  • the red luminescent pigment used in 3 3) was dispersed and applied to a solution of Zeonex made by Nippon Zeon Co., Ltd., and dried at 110 ° C for 3 hours to form a pigment film layer with a thickness of 10 / zm. .
  • the EL device (5) of the present invention was obtained by thermocompression bonding these two coatings so that the luminescent particle layer and ITO were adjacent to each other, mounting a lead piece, and sealing with a moisture-proof film interposed therebetween.
  • "Production of EL device according to the present invention (6)" (Example 6)
  • the aluminum sheet coated with a dielectric layer is coated on a 75 ⁇ m thick aluminum sheet so that the layer thickness is 30 ⁇ m and dried at 110 ° C. for 5 hours. Obtained. Subsequently, the average particle size Xia Bruno ethylcellulose solution ⁇ I ⁇ zinc particles and 30 mass 0/0 with an emission maximum copper and chlorine 15 m to 498nm was activated 1.2: mixed • 1 ratio After the dispersion, it was coated on the aluminum sheet coated with the dielectric layer so that the thickness of the luminescent particle layer was 45 m. This coating was dried at 110 ° C. for 5 hours using a hot air dryer.
  • a film in which ITO is uniformly deposited to a thickness of 40 nm by sputtering on polyethylene terephthalate having a thickness of 100 ⁇ m is made of poly (2-methoxy-5- ⁇ 2′-ethylhexyloxy).
  • Xy) 1,4-Ferene biylene (molecular weight 70000-100,000) was dispersed in cyanoethyl cellulose solution, coated and dried at 110 ° C. for 3 hours to form a 10 m thick layer.
  • the EL device (6) of the present invention was obtained by thermocompression bonding these two coatings, placing a lead piece, and sealing with a moisture-proof film sandwiched between them.
  • FIGS. 2 and 3 show the spatter when the EL element of the present invention prepared as described above and the EL element of the comparative example emit light, and Table 1 shows a comparison of the color rendering properties at that time.
  • the average color rendering index of the EL device of the present invention is superior to the conventional EL device of the comparative example, and in particular, it is excellent in red color rendering.
  • the color rendering property of skin color which is important when observing a transparent medium such as a transparent positive image on the EL element, is greatly improved in the EL element of the present invention.
  • the solution was obtained by applying the solution on an aluminum sheet having a thickness of 75 ⁇ m so that the dielectric layer had a thickness of 25 ⁇ m and drying it at 110 ° C. for 5 hours.
  • the EL device of Comparative Example 1 was obtained by thermocompression bonding these two coated and dried products, mounting lead pieces, and sealing with a moisture-proof film sandwiched between them.
  • a solution obtained by dispersing 30% by mass of a red pigment (Sinleuhi FA-007) made by Sinlohi Co., in cyclohexanol was applied onto the dried product and dried at 1 10 ° C for 2 hours to form a wavelength conversion material layer. Formed. The amount of red pigment applied was adjusted so that the coordinates on the chromaticity diagram of the finished device were between 0.32 and 0.34 for both x and y.
  • the sheet thus obtained was mixed with 30% by mass of BaTiO fine particles having an average particle size of 0.2 ⁇ m.
  • EL elements (1) to (6) of the present invention were prepared by placing lead pieces on the EL sheet obtained by these methods and sealing them with a moisture-proof film.
  • BaTiO coated between the luminescent particle layer and the wavelength converting material layer has an average particle size of 0.2 ⁇ m.
  • the EL elements obtained in the same manner as the EL element preparation (1) except for the above were used as EL elements (7) to (12) of the present invention.
  • the spectrum of the EL device of the present invention satisfies the curve ⁇ ( ⁇ ) described in claim 1, and the EL device prepared by the conventional technique (the spectrum does not satisfy the curve I ( ⁇ )).
  • the emission maximum wavelength of red light emission was longer than that of,), and the red color was vividly expressed, and the color rendering was excellent.
  • the EL device of the present invention was higher in luminance than the EL device of the comparative example.
  • an EL element which is particularly excellent in red color rendering and greatly improved in skin color rendering than conventional EL elements.

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  • Manufacturing & Machinery (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

L’invention concerne un élément électroluminescent de type dispersif émetteur de lumière blanche offrant un excellent rendu des couleurs (notamment du rouge). L’élément électroluminescent de type dispersif comprend une électrode transparente, une électrode de surface arrière et une couche de particules émettrices de lumière maintenue entre les deux électrodes, l’élément étant caractérisé en ce qu’une courbe I(λ) obtenue par normalisation du spectre lorsque l’élément émet de la lumière obéit à la relation g(λ)≤ I(λ)≤ f(λ), dans une plage de longueurs d’onde de 410 nm à 650 nm, où g(λ)=0,9exp(-ln(2)((λ-490)/25))2)+0,25exp(-ln(2)((λ-550)/25))2 )+0,4exp(-ln(2)((λ-610)/20))2 )+0,15exp(-ln(2)(( λ-625)/40))2) et f(λ)=1,1exp(-ln(2)((λ-490)/55))2)+0,8exp(-ln(2)((λ-605)/25))2 )+0,5exp(-ln(2)(( λ-640)/40))2) [Expression 1]
PCT/JP2005/015790 2004-08-31 2005-08-30 Element electroluminescent de type dispersif WO2006025403A1 (fr)

Applications Claiming Priority (6)

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JP2004-252245 2004-08-31
JP2004252245 2004-08-31
JP2004-316405 2004-10-29
JP2004315982 2004-10-29
JP2004-315982 2004-10-29
JP2004316405 2004-10-29

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2175695A1 (fr) * 2008-10-13 2010-04-14 Michel Tramontana Configuration de couche électroluminescente et son procédé de production
WO2010106934A1 (fr) * 2009-03-17 2010-09-23 Fujifilm Corporation Dispositif électroluminescent de type à dispersion
WO2010114157A1 (fr) * 2009-03-31 2010-10-07 Fujifilm Corporation Dispositif à électroluminescence du type à dispersion

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JPH06337647A (ja) * 1993-05-28 1994-12-06 Nec Kansai Ltd 電界発光灯表示板及びその製造方法
JPH08138424A (ja) * 1994-11-11 1996-05-31 Matsushita Electric Ind Co Ltd 照明ランプおよび照明器具
JPH11260561A (ja) * 1998-03-10 1999-09-24 Nec Kansai Ltd 電界発光灯
JP2000150155A (ja) * 1998-11-16 2000-05-30 Alps Electric Co Ltd 多層エレクトロルミネッセンス素子
JP2000236112A (ja) * 1996-09-20 2000-08-29 Siemens Ag 波長変換する注型材料の使用方法
JP2000252073A (ja) * 1999-02-24 2000-09-14 Seiko Precision Inc Ｅｌランプ
JP2000277259A (ja) * 1999-03-23 2000-10-06 Matsushita Electric Ind Co Ltd Ｅｌランプおよびこれを用いたｅｌランプユニット
JP2002062530A (ja) * 2000-06-05 2002-02-28 Toshiba Corp カラー液晶用バックライト、カラー液晶表示装置、およびカラー液晶バックライト用ｅｌ発光素子
JP2004182781A (ja) * 2002-11-29 2004-07-02 Nichia Chem Ind Ltd 窒化物蛍光体及びそれを用いた発光装置
JP2004210921A (ja) * 2002-12-27 2004-07-29 Nichia Chem Ind Ltd オキシ窒化物蛍光体及びその製造方法並びにそれを用いた発光装置

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Publication number Priority date Publication date Assignee Title
JPH06337647A (ja) * 1993-05-28 1994-12-06 Nec Kansai Ltd 電界発光灯表示板及びその製造方法
JPH08138424A (ja) * 1994-11-11 1996-05-31 Matsushita Electric Ind Co Ltd 照明ランプおよび照明器具
JP2000236112A (ja) * 1996-09-20 2000-08-29 Siemens Ag 波長変換する注型材料の使用方法
JPH11260561A (ja) * 1998-03-10 1999-09-24 Nec Kansai Ltd 電界発光灯
JP2000150155A (ja) * 1998-11-16 2000-05-30 Alps Electric Co Ltd 多層エレクトロルミネッセンス素子
JP2000252073A (ja) * 1999-02-24 2000-09-14 Seiko Precision Inc Ｅｌランプ
JP2000277259A (ja) * 1999-03-23 2000-10-06 Matsushita Electric Ind Co Ltd Ｅｌランプおよびこれを用いたｅｌランプユニット
JP2002062530A (ja) * 2000-06-05 2002-02-28 Toshiba Corp カラー液晶用バックライト、カラー液晶表示装置、およびカラー液晶バックライト用ｅｌ発光素子
JP2004182781A (ja) * 2002-11-29 2004-07-02 Nichia Chem Ind Ltd 窒化物蛍光体及びそれを用いた発光装置
JP2004210921A (ja) * 2002-12-27 2004-07-29 Nichia Chem Ind Ltd オキシ窒化物蛍光体及びその製造方法並びにそれを用いた発光装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2175695A1 (fr) * 2008-10-13 2010-04-14 Michel Tramontana Configuration de couche électroluminescente et son procédé de production
WO2010043608A1 (fr) * 2008-10-13 2010-04-22 Calluori, Luigi Egidio Configuration de couche électroluminescente et son procédé de production
WO2010106934A1 (fr) * 2009-03-17 2010-09-23 Fujifilm Corporation Dispositif électroluminescent de type à dispersion
WO2010114157A1 (fr) * 2009-03-31 2010-10-07 Fujifilm Corporation Dispositif à électroluminescence du type à dispersion

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