Abstract: A surface emitting-type electroluminescent device capable of being driven by a DC power source and excellent in durability is provided. A surface emitting-type electroluminescent device containing a stacked structure in which a transparent electrical conductor layer, a transparent semiconductor layer and/or a transparent insulator layer, a light-emitting layer and a back electrode layer are arrayed in this order, the transparent electrical conductor layer, the transparent semiconductor layer and the transparent insulator layer each containing a metal oxide.

Abstract: In an electroluminescent device which is applied to a backlight and a display device and characterized in that a flexible material construction using a plastic substrate is enabled and the device can be produced at a low cost through a relatively simple step without using a vacuum unit and also in that the emission color of the device can be easily controlled by mixing a plurality of fluorescent material particles differing in the emission color or by using a fluorescent dye for the color conversion, the present invention provides a surface emitting-type electro-luminescent device capable of using a low voltage AC power source, realizing uniform brightness and having a large-area emission surface.

Abstract: To provide a low-resistance transparent conductive film with high light transmittance, which is a transparent conductive film including a transparent polymer film having on one surface thereof a transparent thin film layer with conductivity and a blocking layer containing at least one material selected from the group consisting of a thermoplastic resin, a thermosetting resin and a UV-curable resin on the thin film, which is characterized in: that a surface resistivity of the transparent thin film layer with conductivity is 0.1?/? or more and not more than 100?/?; and that a refractive index of the material constituting the blocking layer is 1.6 or more and less than 1.9, and a dispersion-type EL device with high luminance and long life using the same.

Abstract: The present invention provides a method for producing metallic nanoparticles, which includes reacting a copper compound with a hydrazine reducing agent in an organic solvent in the presence of a precious metal compound, wherein the precious metal compound is a compound containing at least one precious metal selected from the group consisting of platinum, gold, silver, and palladium, and the total number of precious metal atoms in the precious metal compound is in the range of 1 to 10 at. % of the total copper atoms in the copper compound.

Abstract: An image-taking system includes an image-taking device which takes an image of a subject; a flashing device which emits a flash to the subject; an illumination device which has a surface positioned opposite the image-taking device and which illuminates the subject interposed between the image-taking device and the surface with light emitted from the surface. The system further includes a background replacement device which acquires a plurality of images of the subject taken by the image-taking device under a respective plurality of image-taking-light conditions created by the flashing device and the illumination device, discriminates between the subject and a background in a taken image based on the acquired images, and replaces the background with another background.

Abstract: A method of producing an electroluminescence phosphor, which contains the steps of: mixing a phosphor matrix, a flux, an activator, and a particle diameter-controlling additive that does not enter into a crystal lattice of the phosphor matrix, to give a mixture; and baking the mixture, to produce the electroluminescence phosphor, the method containing the step of: adding an acidic or alkaline solution, to remove the particle diameter-controlling additive from the phosphor; an electroluminescence phosphor, which is produced by the method; and an electroluminescence device, which contains the electroluminescence phosphor.

Abstract: A silver halide emulsion is disclosed, comprising silver halide grains which each have a host tabular grain part and a part grown on the outside thereof, wherein in said host tabular grains parts, at least 50% of total projected area of the silver halide grains are accounted for by silver halide tabular grains having {111} main surfaces, and said silver halide grains comprises the main surface of the host tabular grain part subjected to junction with high-iodide epitaxial phases comprising silver halide containing at least 97 mole % of silver iodide and the lateral face of the host tabular grain part comprises silver halide having an iodide content of substantially 5 mole % or below; and a method of preparing a silver halide photographic emulsion is disclosed, comprising silver halide grains which each have a host tabular grain part and a part grown on the outside thereof.

Abstract: A silver halide emulsion is disclosed, comprising silver halide grains which each have a host tabular grain part and a part grown on the outside thereof, wherein in said host tabular grains parts, at least 50% of total projected area of the silver halide grains are accounted for by silver halide tabular grains having {111} main surfaces, and said silver halide grains comprises the main surface of the host tabular grain part subjected to junction with high-iodide epitaxial phases comprising silver halide containing at least 97 mole % of silver iodide and the lateral face of the host tabular grain part comprises silver halide having an iodide content of substantially 5 mole % or below; and a method of preparing a silver halide photographic emulsion is disclosed, comprising silver halide grains which each have a host tabular grain part and a part grown on the outside thereof.

Abstract: A silver halide emulsion is disclosed, comprising silver halide grains of which 70% or more of the total projected area is occupied by tabular grains, said tabular grain having main surfaces of {111} face and a thickness of 0.04 &mgr;m or less and being joined with an epitaxial phase comprising silver halide containing 97 mol % or more of silver iodide.