Abstract: A backlight device is provided that realizes high luminance while widening the color range. The backlight device illuminates a transmissive color liquid crystal display panel with white light from a back side of the transmissive color liquid crystal display panel having a color filter made of a three-primary-color filter which selectively transmits light having wavelengths of red light, green light, and blue light. The backlight device includes a plurality of cold cathode fluorescent lamp tubes having tube walls coated with a wide-color-range fluorescent material. The backlight device also includes a diffusion plate which diffuses white light emitted from the cold cathode fluorescent lamp tubes, illuminates the color liquid crystal display panel with the diffused white light, and is positioned at a predetermined distance from the cold cathode fluorescent lamp tubes.

Abstract: The present invention aims at compatibility between the improvement in luminance or suppression of deterioration in luminance and the improvement in contrast with respect to a display apparatus and a color cathode-ray tube. Each of the display apparatus and the color cathode-ray tube according to the present invention includes: a fluorescent screen having a color-filter layer and a phosphor layer, which is formed inside a panel glass having light transmissivity of 55% to 20% when a wavelength is 546 nm and a plate thickness is 20 mm and in which at least the phosphor layer is formed by the transfer method.

Abstract: There is provided a fluorescent lamp having construction where no difference is surely caused between a composition of the fluorescent particle mixture at one end portion of the glass tube and a composition of the fluorescent particle mixture at another end portion of the glass tube. The fluorescent lamp includes the glass tube and a fluorescent particle layer, formed on the inner surface of the glass tube, including a fluorescent particle mixture of blue light emitting fluorescent particles having an average specific gravity of 4.0±0.4, red light emitting fluorescent particles having an average specific gravity of 4.0±0.4, and green light emitting fluorescent particles having an average specific gravity of 4.0±0.4, wherein the fluorescent particle mixture forming the fluorescent particle layer has a specific gravity of 4.0±0.4.

Abstract: This invention relates to coated particles used as phosphor particles for a phosphor screen of a display and a coating method for such particles. In the coating method of the present invention, first particles having a mean particle diameter of 3 to 10 ?m are fluidized, and slurry drops obtained by suspending second particles having a mean particle diameter of 5 to 500 nm are generated from a spray nozzle or the like. Then, the fluidized first particles and the slurry drops are collided with each other, and thereby the second particles are coated on the surfaces of the first particles. Thereby, this invention is able to present coated particles wherein each surface of the first particles is uniformly coated with the second particles that are more microscopic than the first particles.

Abstract: This invention relates to coated particles used as phosphor particles for a phosphor screen of a display and a coating method for such particles. In the coating method of the present invention, first particles having a mean particle diameter of 3 to 10 ?m are fluidized, and slurry drops obtained by suspending second particles having a mean particle diameter of 5 to 500 nm are generated from a spray nozzle or the like. Then, the fluidized first particles and the slurry drops are collided with each other, and thereby the second particles are coated on the surfaces of the first particles. Thereby, this invention is able to present coated particles wherein each surface of the first particles is uniformly coated with the second particles that are more microscopic than the first particles.

Abstract: The present invention proposes a Braun Tube for projectors having an illuminant layer provided on a phosphor screen, the illuminant layer including Zinc Silver Aluminum Oxide (ZnS:Ag, Al) as a blue color illuminant, Yttrium Terbium Silicate (Y2SiO5:Tb) as a green color illuminant, and Yttrium Europium Oxide (Y2O3:Eu) as a red color illuminant, all illuminants having particle size of 5 to 7 ?m. As a result, it is possible to realize a Braun Tube for projectors, in which an extended life cycle is achieved by constraining the degradation of the illuminant, constraining the browning phenomenon, as well as improving the spot size of the electron beam thereof.

Abstract: A display panel comprising a substrate, a fluorescence layer which is to be caused to emit light by electrons from a vacuum space, and an anode electrode which is to direct the electrons toward the fluorescence layer, wherein the anode electrode comprises a lower electrode and an upper electrode.

Abstract: This invention relates to coated particles to be used as phosphor particles for a phosphor screen of a display and a coating method for such particles. In the coating method of the present invention, first particles having a mean particle diameter of 3 to 10 &mgr;m are fluidized, and slurry drops obtained by suspending second particles having a mean particle diameter of 5 to 500 nm are generated from a spray nozzle 40 or the like. Then, the fluidized first particles and the slurry drops are collided to each other, and thereby the second particles are coated on surfaces of the first particles. Thereby, this invention is able to present such coated particles wherein each surface of the first particles is uniformly coated with the second particles that are more microscopic than the first particles.

Abstract: The present invention provides a method for manufacturing a luminescent material whereby the surfaces of phosphor particles are uniformly coated with glass, and a luminescent material made up of such particles is easily obtainable, a luminescent material manufactured by the manufacturing method, and a display substrate and a display apparatus having the luminescent material. The luminescent material is manufactured through the steps of adding a phosphor in the form of a solid solution comprising a sulfide or an oxysulfide, and a luminescent center substance incorporated in the sulfide or the oxysulfide in an aqueous solution containing water glass with stirring; adding the resulting aqueous solution to an aqueous solution of a metallic salt with stirring; forcedly extracting particles of the phosphor from the resulting aqueous solution; and drying the particles of the phosphor extracted.

Abstract: The present invention proposes a Braun Tube for projectors having an illuminant layer provided on a phosphor screen, the illuminant layer including Zinc Silver Aluminum Oxide (ZnS:Ag, Al) as a blue color illuminant; Yttrium Terbium Silicate (Y2SiO5:Tb) as a green color illuminant; and Yttrium Europium Oxide (Y2O3:Eu) as a red color illuminant, all illuminants having particle size of 5 to 7 &mgr;m. As a result, it is possible to realize a Braun Tube for projectors, in which an extended life cycle is achieved by constraining the degradation of the illuminant, constraining the browning phenomenon as well as improving the spot size of the electron beam thereof.

Abstract: The present invention provides a method for manufacturing a luminescent material whereby the surfaces of phosphor particles are uniformly coated with glass, and a luminescent material made up of such particles is easily obtainable, a luminescent material manufactured by the manufacturing method, and a display substrate and a display apparatus having the luminescent material. The luminescent material is manufactured through the steps of adding a phosphor in the form of a solid solution comprising a sulfide or an oxysulfide, and a luminescent center substance incorporated in the sulfide or the oxysulfide in an aqueous solution containing water glass with stirring; adding the resulting aqueous solution to an aqueous solution of a metallic salt with stirring; forcedly extracting particles of the phosphor from the resulting aqueous solution; and drying the particles of the phosphor extracted.

Abstract: A fluorescent material is disclosed which is excellent in the intensity of color and brightness and suitable for a FED and a precise CRT. The fluorescent material is prepared by co-activating yttrium oxide fluorescent material activated with europium. The means particle size is 10 nm to 100 nm. To prepare the fluorescent material, basic carbonate activated with europium and zinc is used as a precursor which is then baked. The precursor is prepared by a liquid-phase reaction. Specifically, yttrium nitrate, europium nitrate and zinc acetate are allowed to react in a solution together with sodium carbonate. The prepared precursor is baked by a quick heating and cooling As an alternative to this, the precursor is baked together with flux (phosphate of alkali metal).

Abstract: There is provided a novel method for manufacturing a light-emitting material composed of II-VI group semiconductors having a nano structure crystal and which is optimally doped with an activator. In a manufacturing method for the light-emitting material, a II-VI group semiconductor doped with an activator by a liquid phase reaction having a co-precipitation product is formed and an organic acid is added to the liquid phase reaction system. In another manufacturing method for the light-emitting material, a II-VI group semiconductor doped with an activator by a liquid phase reaction having a product co-precipitation is formed and a high molecular organic acid or polystyrene is added after the end of the liquid phase reaction.