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:
Jan. 21, 2014
Filed:
Sep. 09, 2011
Hajime Takeuchi, Yokohama, JP;
Ryo Sakai, Yokohama, JP;
Tsutomu Ishii, Yokohama, JP;
Yasumasa Ooya, Chigasaki, JP;
Yasuhiro Shirakawa, Yokohama, JP;
Hajime Takeuchi, Yokohama, JP;
Ryo Sakai, Yokohama, JP;
Tsutomu Ishii, Yokohama, JP;
Yasumasa Ooya, Chigasaki, JP;
Yasuhiro Shirakawa, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Materials Co., Ltd., Yokohama-shi, JP;
Abstract
In a embodiment, a white LED for a backlight of a liquid crystal display device conforming to the EBU standard includes an ultraviolet (purple) light-emitting element, and a phosphor layer which contains 1 to 10 wt % of a green phosphor including a divalent europium-activated silicate phosphor, 40 to 80 wt % of a blue phosphor including at least one selected from a divalent europium-activated halo-phosphate phosphor and a divalent europium-activated aluminate phosphor, and 10 to 50 wt % of a red phosphor including at least one selected from a europium-activated lanthanum oxysulfide phosphor and a europium-activated yttrium oxysulfide phosphor.