Abstract: An intermediate layer (11) comprises a basic material such as a conductive polymer that taken alone still absorbs some light. Combined with colloidal particles (12) the intermediate layer (11) becomes almost fully transparent. An electroluminescent arrangement with an intermediate layer (11) that is almost fully transparent because of colloidal particle (12) comprised therein has an increased efficiency and thus requires less energy for the same luminescent properties.

Abstract: The invention relates to an electroluminescent device comprising a substrate (1) and a laminated body composed of a first electrode (3), an electroluminescent layer (4) and a second electrode (5). The light output out of the electroluminescent device is increased by arranging a colloidal layer (2) between the substrate (1) and the laminated body. By using pigments in the colloidal layer (2), the emmission color of the electroluminescent device can be changed and the daylight contrast improved.

Abstract: A luminaire comprising at least one light source arranged in a housing for emitting a light beam through a light-transmitting plate of the housing, with the special feature that said housing is provided with a diffuse reflective coating having a water-based solvent and a binder. The binder is on the basis of either a polymer selected from the group formed by compounds of the following structural formula (I): wherein R1 comprises an element chosen from the group Br, Cl, I, F, H, wherein R2 comprises an element chosen from the group Br, Cl, I, F. H, or an alkyl group, wherein R3 comprises an element chosen from the group Br, Cl, I, F, H, or COOCH3, and wherein R4 comprises an element chosen from the group Br, Cl, I, F, H, OH, or vinylether, or an organically modified silane of the sol-gel type, wherein said diffuse reflective coating is applied as a diffuser on the light-transmitting plate.

Abstract: Light-emitting devices are disclosed that comprise a light source emitting first light, a first material substantially transparent to and located to receive at least a portion of the first light, and particles of a second material dispersed in the first material. The second material has an index of refraction greater than an index of refraction of the first material at a wavelength of the first light. The particles of the second material have diameters less than about this wavelength. Particles of a third material may also be dispersed in the first material.

Abstract: A color cathode ray tube, that is fitted with a color screen that comprises a glass face panel, a phosphor coating UV-reflective layer that is arranged between the glass face panel and the phosphor coating, the UV-reflective layer containing colloid particles of an oxygen-containing material, having a grain size d<400 nm.

Abstract: Light-emitting devices are disclosed that comprise a light source emitting first light, a first material substantially transparent to and located to receive at least a portion of the first light, and particles of a second material dispersed in the first material. The second material has an index of refraction greater than an index of refraction of the first material at a wavelength of the first light. The particles of the second material have diameters less than about this wavelength. Particles of a third material may also be dispersed in the first material.

Abstract: The invention relates to an electroluminescent device comprising a substrate (1) and a laminated body composed of a first electrode (3), an electroluminescent layer (4) and a second electrode (5). The light output out of the electroluminescent device is increased by arranging a colloidal layer (2) between the substrate (1) and the laminated body. By using pigments in the colloidal layer (2), the emmission color of the electroluminescent device can be changed and the daylight contrast improved.

Abstract: A color cathode ray tube provided with a front shell having an inner and an outer surface and a display screen coating on the front shell comprising a structured phosphor coating with phosphor grids for the colors red, green and blue and a filter system comprised of a first structured optical filter of the transmission type for the color blue and of a second unstructured optical filter.

Abstract: The invention relates to a plasma picture screen with a powder layer (8) in the plasma cells, which layer has a low dielectric constant K and thus reduces the discharge capacitance in the plasma cell. Such a plasma picture screen has an enhanced efficiency and an enhanced luminance.

Abstract: An organic electroluminescent display device comprising a front electrode member, a counterelectrode member, an organic electroluminescent member arranged between the front electrode member and the counterelectrode member, and an optical filter member with a cut-off filter to absorb electromagnetic radiation whose wavelength is below a cut-off wavelength ?k, and to transmit electromagnetic radiation whose wavelength is above a cut-off wavelength ?k, has an improved contrast under bright ambient light conditions.

Abstract: Light-emitting devices are disclosed that comprise a light source emitting first light, a first material substantially transparent to and located to receive at least a portion of the first light, and particles of a second material dispersed in the first material. The second material has an index of refraction greater than an index of refraction of the first material at a wavelength of the first light. The particles of the second material have diameters less than about this wavelength. Particles of a third material may also be dispersed in the first material.

Abstract: An electric lamp which is provided with an electric light source in a light-transmitting bulb provided with a coating comprising an inorganic colored pigment selected from the group formed by oxide nitride pigments of the general formula A1?xA?xBO2?xN1+x, wherein A=Mg, Ca, Sr, Ba, Zn, A?=Ln, Bi, Al, Fe, B=V, Nb, Ta, Mo, W and B?=Ti, Zr, Hf, Sn, Ge, Si, Nb, Ta and 0<x<1 or an oxide-nitride pigment of the general formula AB1?xB?xBO1+xN2?x, wherein A=Mg, Ca, Sr, Ba, Zn, A?=Ln, Bi, Al, Fe, B=V, Nb, Ta, Mo W and B?=Ti, Zr, Hf, Sn, Ge, Si, Nb, Ta and 0<x<1 or an oxide-nitride pigment of the general formula AyA?2?yB2O5+yN2?y, wherein A=Mg, Ca, Sr, Ba, Zn, A?=Ln, Bi, Al, Fe, B=V, Nb, Ta, Mo, W and B?=Ti, Zr, Hf, Sn, Ge, Si, Nb, Ta and 0<y<2 or an oxide-nitride pigment of the general formula A?2B2?yB?yO5+yN2?y, wherein A=Mg, Ca, Sr, Ba, Zn, A?=Ln, Bi, Al, Fe, B=V, Nb, Ta, Mo, W and B?=Ti, Zr, Hf, Sn, Ge, Si, Nb, Ta and 0<y<2 or an oxide-nitride pigment of the general formula CD2?mD?mO4

Abstract: A plasma color display screen comprising a carrier plate, a transparent front plate, separating ribs which divide the space between the carrier plate and the front plate into discharge cells which are filled with a gas, one or more electrode arrays on the front plate and on the carrier plate to generate corona discharges in the discharge cells, a structured phosphor layer on the front plate composed of segments with red, green and blue-emitting phosphors and a structured filter layer of segments with color filters selected from the group of red, green and blue color filters, which filter layer is arranged between the inner surface of the front plate and the structured phosphor layer.

Abstract: The invention describes a color picture screen with an enhanced contrast. The color picture screen comprises a color filter layer between the picture screen glass and the phosphor layer, which filter layer comprises a red pigment in the areas of the red phosphors, a blue pigment in the areas of the blue phosphors, and a blue or a red pigment in the areas of the green phosphors.

Abstract: A plasma picture screen is disclosed. In one embodiment, an AC plasma picture screen with a coplanar arrangement which has an enhanced luminance is provided. A layer, which has a high reflection in the wavelength range of the plasma emission (145 to 200 nm) and a high transmission in the visible wavelength range, is provided on the front plate. The front plate includes a glass plate on which a dielectric layer, a protective layer, a reflective layer are provided. The reflective layer reflects UV light emitted in the direction of the front plate back towards phosphors. The optical properties of the UV light reflecting layer are realized with inorganic particles with a particle diameter of between 200 nm and 500 nm and a layer thickness from 0.5 &mgr;m to 5 &mgr;m, or with agglomerates of inorganic particles with a particle diameter of between 10 nm and 200 nm and a layer thickness of 0.2 &mgr;m to 10 &mgr;m.

Abstract: A plasma display panel having a structured black matrix (8) which is coated with a reflecting layer (9) on the side turned away from the viewer. Visible light incident from outside is absorbed by the black matrix (8) and light incident from inside is reflected by the reflecting layer (9). This enhances the LCP value of the whole plasma screen. A protective layer (5) such as MgO is deposited on the black matrix and reflecting layer and so formed over the black matrix and said reflecting layer so as to reduce undesired reactions of the black matrix and the reflecting layer with the dielectric layer, such as during high temperature conditions during manufacture.

Abstract: The invention relates to a plasma picture screen with a improved white color point. The front plate (1) of the plasma picture screen has a blue layer on the side facing the plasma discharge. This may be the dielectric layer (4), the protective layer (5), or an additional layer.

Abstract: Light-emitting devices are disclosed that comprise a light source emitting first light, a first material substantially transparent to and located to receive at least a portion of the first light, and particles of a second material dispersed in the first material. The second material has an index of refraction greater than an index of refraction of the first material at a wavelength of the first light. The particles of the second material have diameters less than about this wavelength. Particles of a third material may also be dispersed in the first material.

Abstract: A plasma picture screen comprises a front plate including a glass plate on which a dielectric layer and a protective layer are provided; a carrier plate provided with a phosphor layer including a red and a blue phosphor as well as a green Tb3+-activated phosphor, with a ribbed structure which subdivides the space between the front plate and the carrier plate into gas-filled plasma cells; and a green color filter layer. One or several electrode arrays are provided on the front plate and the carrier plate for generating corona discharges in the plasma cells.

Abstract: The invention relates to a plasma picture screen with a improved white color point. The front plate (1) of the plasma picture screen has a blue layer on the side facing the plasma discharge. This may be the dielectric layer (4), the protective layer (5), or an additional layer.