发明申请
- 专利标题： LIGHT EMITTING DEVICE
- 专利标题（中）： 发光装置
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申请号： US13214572申请日： 2011-08-22
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公开(公告)号： US20120056225A1公开(公告)日： 2012-03-08
- 发明人: Iwao MITSUISHI , Kunio Ishida , Yumi Fukuda , Aoi Okada , Naotoshi Matsuda , Keiko Albessard , Shinya Nunoue , Masahiro Kato
- 申请人： Iwao MITSUISHI , Kunio Ishida , Yumi Fukuda , Aoi Okada , Naotoshi Matsuda , Keiko Albessard , Shinya Nunoue , Masahiro Kato
- 申请人地址： JP Tokyo
- 专利权人： KABUSHIKI KAISHA TOSHIBA
- 当前专利权人： KABUSHIKI KAISHA TOSHIBA
- 当前专利权人地址： JP Tokyo
- 优先权： JP2010-199983 20100907; JP2011-177808 20110816
- 主分类号： H01L33/50
- IPC分类号： H01L33/50
摘要：
A light emitting device according to one embodiment includes a board; a light emitting element mounted on the board, emitting light having a wavelength of 250 nm to 500 nm; a red fluorescent layer formed on the element, including a red phosphor expressed by equation (1), having a semicircular shape with a diameter r; (M1−x1Eux1)aSibAlOcNd (1) (In the equation (1), M is an element that is selected from IA group elements, IIA group elements, IIIA group elements, IIIB group elements except Al (Aliminum), rare-earth elements, and IVB group elements),an intermediate layer formed on the red fluorescent layer, being made of transparent resin, having a semicircular shape with a diameter D; and a green fluorescent layer formed on the intermediate layer, including a green phosphor, having a semicircular shape. A relationship between the diameter r and the diameter D satisfies equation (2): 2.0r(μm)≦D≦(r+1000)(μm). (2)
公开/授权文献
- US08921878B2 Light emitting device 公开/授权日：2014-12-30
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