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:
Nov. 25, 2014
Filed:
Apr. 25, 2006
Ryo Sakai, Yokohama, JP;
Yasuhiro Shirakawa, Yokohama, JP;
Hajime Takeuchi, Yokohama, JP;
Tsutomu Ishii, Yokohama, JP;
Yasumasa Ooya, Yokohama, JP;
Ryo Sakai, Yokohama, JP;
Yasuhiro Shirakawa, Yokohama, JP;
Hajime Takeuchi, Yokohama, JP;
Tsutomu Ishii, Yokohama, JP;
Yasumasa Ooya, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
Disclosed are a white LED, which has color reproducibility comparable with that of a cold-cathode tube and improved brightness, and a backlight and a liquid crystal display device comprising the white LED. The white LED comprises at least one light emitting element selected from ultraviolet light emitting diodes, purple light emitting diodes, ultraviolet light emitting lasers, and purple light emitting lasers, and a phosphor layer. The phosphor layer comprises a green phosphor satisfying formula 1, a blue phosphor satisfying formula 2 or 3, and a red phosphor satisfying formula 4 or 5: