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Kojiro Okuyama, Nara JP

Kojiro Okuyama, Nara JP

Patent application numberDescriptionPublished
20080203893Light-Emitting Device - The present invention is a light-emitting device which is provided with a phosphor layer containing a blue phosphor, wherein the phosphor layer includes an aluminate phosphor, as the blue phosphor, that contains Ba, Sr, Eu, Mg, Al and O as constituting elements at an atom-number ratio Ba:Sr:Eu:Mg:Al:O=p:q:r:1:w:17 wherein 0.70≦p≦0.95, 0≦q≦0.15, 0.05≦r≦0.20, p+q+r≧1, and 9.8≦w≦10.5 are satisfied, and a value of a linear coupling function s represented by a formula:08-28-2008
20090021145PHOSPHOR, LIGHT-EMITTING DEVICE, AND PLASMA DISPLAY PANEL - The present invention is a blue phosphor that is represented by a general formula xSrO.yEuO.MgO.zSiO01-22-2009
20090058254PHOSPHOR AND LIGHT-EMITTING DEVICE - The present invention provides a phosphor that has high luminance, a property of low luminance degradation during PDP driving, and chromaticity y comparable to that of BAM:Eu. The present invention is the phosphor that is represented by the general formula xAO.y03-05-2009
20090072704PHOSPHOR AND LIGHT-EMITTING DEVICE - The present invention provides a phosphor that has high luminance, a property of low luminance degradation during PDP driving, and chromaticity y comparable to that of BAM:Eu. The present invention is the phosphor that is represented by the general formula xAO.y03-19-2009
20090200945PHOSPHOR AND LIGHT-EMITTING DEVICE - The present invention provides a phosphor having high luminance, a property of low luminance degradation during driving of a light-emitting device, and chromaticity y comparable to that of BAM:Eu. The present invention is a phosphor represented by the general formula aAO.bEuO.DO.cSiO08-13-2009
20090218926METHOD OF MANUFACTURING BLUE SILICATE PHOSPHOR, AND BLUE SILICATE PHOSPHOR AND LIGHT-EMITTING DEVICE - The present invention provides a method of manufacturing a blue silicate phosphor having high luminance and a chromaticity y comparable to or lower than that of BAM:Eu. The present invention is a method of manufacturing a blue silicate phosphor represented by the general formula aAO.bEuO.(Mg09-03-2009
20100052506BLUE PHOSPHOR, LIGHT-EMITTING DEVICE, AND PLASMA DISPLAY PANEL - The present invention provides a blue phosphor having high luminance and showing less luminance degradation during driving of a light-emitting device. The present invention is a blue phosphor that includes: an alkaline earth metal aluminate represented by a general formula aBaO.bSrO.(1−a−b)EuO.cMgO.dAlO03-04-2010
20100141113BLUE PHOSPHOR, LIGHT-EMITTING DEVICE, AND PLASMA DISPLAY PANEL - The present invention provides a blue phosphor that exhibits high luminance and shows less luminance degradation during driving of a light-emitting device. The present invention is a blue phosphor represented by the general formula aBaO.bSrO.(1−a−b)EuO.cMgO.dAlO06-10-2010
20100156266GAS DISCHARGE LIGHT EMITTING PANEL - A gas discharge light emitting panel is provided that prevents deterioration in display properties of the panel, which accompanies changes in light-emitting properties of phosphors. It includes a front panel and a rear panel that are disposed to oppose each other, with a discharge space being interposed therebetween, and a phosphor layer that is disposed above a principal surface located on the discharge space side of the rear panel and that emits light by being irradiated with ultraviolet rays generated in the discharge space. The phosphor layer contains first and second phosphors in which the changes in at least one property selected from luminance and chromaticity, which accompany driving of the panel, occur in the opposite directions to each other.06-24-2010
20100164360BLUE PHOSPHOR, LIGHT-EMITTING DEVICE, AND PLASMA DISPLAY PANEL - The present invention provides a phosphor having high luminance, a property of low luminance degradation during driving of a light-emitting device and manufacturing processes, and chromaticity y in PDP comparable to that of BAM:Eu. The present invention is the phosphor represented by the general formula xSrO.yEuO.MgO.zSiO07-01-2010
20100237764BLUE PHOSPHOR, AND LIGHT-EMITTING DEVICE USING THE SAME - The blue phosphor of the present invention includes ZrO09-23-2010
20100237765BLUE PHOSPHOR, AND LIGHT-EMITTING DEVICE USING THE SAME - The blue phosphor of the present invention is represented by the general formula aBaO.bSrO.(1−a−b)EuO.cMgO.dAlO09-23-2010
20100259158PLASMA DISPLAY PANEL - A plasma display panel (10-14-2010
20100259466PLASMA DISPLAY PANEL - The present invention aims to improve efficiency of a PDP by providing a material suitable for improving a secondary electron emission coefficient of the PDP. In order to achieve the aim, in a PDP 10-14-2010
20110068680PHOSPHOR, LIGHT EMITTING DEVICE, AND PLASMA DISPLAY PANEL - The present invention provides a phosphor with high luminance and color purity. The phosphor of the present invention is represented by the general formula: aYO03-24-2011
20110163657PHOSPHOR, METHOD FOR PRODUCING THE SAME, AND LIGHT-EMITTING DEVICE - The present invention provides a phosphor with less luminance degradation that includes an oxide that is excellent in chemical stability and allows the electrostatic charge of the phosphor surface to shift toward positive direction. The present invention is a phosphor including a phosphor body and a composite oxide on at least a part of the surface of the phosphor body. The composite oxide contains M, Sn, and O, and M is at least one element selected from the group consisting of Ca, Sr, and Ba.07-07-2011

Patent applications by Kojiro Okuyama, Nara JP