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:
Jul. 14, 2020
Filed:
Jul. 26, 2017
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Toshiba Materials Co., Ltd., Yokohama-shi, JP;
Ryosuke Hiramatsu, Yokohama, JP;
Keiko Albessard, Yokohama, JP;
Kunio Ishida, Fuchu, JP;
Yasushi Hattori, Kawasaki, JP;
Masahiro Kato, Naka, JP;
Kabushiki Kaisha Toshiba, Minato-ku, JP;
TOSHIBA MATERIALS CO., LTD., Yokohama-shi, JP;
Abstract
Embodiments of the present invention provide a phosphor improved in the emission intensity maintenance ratio without impairing the emission intensity and further a light-emitting device employing that phosphor. The phosphor is activated by manganese and has a basic structure comprising at least one element selected from the group consisting of potassium, sodium and calcium; at least one element selected from the group consisting of silicon and titanium; and fluorine. In an IR absorption spectrum of the phosphor, the intensity ratio of the peak in 3570 to 3610 cmto that in 1200 to 1240 cmis 0.1 or less.