The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 2007
Filed:
Jul. 30, 2004
Kazuro Nagashima, Ohnojo, JP;
Masayuki Maekawa, Sasaguri-machi, JP;
Seiyu Teruya, Chikushino, JP;
Fujio Amada, Chikushino, JP;
Junichi Ozawa, Honami-machi, JP;
Kazuro Nagashima, Ohnojo, JP;
Masayuki Maekawa, Sasaguri-machi, JP;
Seiyu Teruya, Chikushino, JP;
Fujio Amada, Chikushino, JP;
Junichi Ozawa, Honami-machi, JP;
Shoei Chemical Inc., Tokyo, JP;
Abstract
A method of manufacturing a highly crystallized phosphor powder, comprising: making a raw material solution containing metal elements and/or semimetal elements that will be constituents of the phosphor into fine liquid droplets, subjecting the liquid droplets to decomposition by heating at a temperature of 500 to 1800° C. to produce hollow precursor particles and/or porous precursor particles, heating the precursor particles to crystallize the precursor particles while maintaining the hollow or porous form, and grinding the crystallized particles down to a predetermined particle size. The obtained phosphor powder is a high luminance inorganic phosphor powder that is extremely fine, and yet has few defects on the surface of or inside the powder, and hence has excellent crystallinity and light emission characteristics, and provides a phosphor composition useful for producing a phosphor layer with high coverage and high luminance of light emission.