发明授权
- 专利标题： Light emitting device
- 专利标题（中）： 发光装置
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申请号： US13214444申请日： 2011-08-22
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公开(公告)号： US08558251B2公开(公告)日： 2013-10-15
- 发明人: Iwao Mitsuishi , Yumi Fukuda , Aoi Okada , Ryosuke Hiramatsu , Naotoshi Matsuda , Shinya Nunoue , Keiko Albessard , Masahiro Kato
- 申请人： Iwao Mitsuishi , Yumi Fukuda , Aoi Okada , Ryosuke Hiramatsu , Naotoshi Matsuda , Shinya Nunoue , Keiko Albessard , 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
- 代理机构： Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 优先权： JP2010-198630 20100906; JP2011-177806 20110816
- 主分类号： H01L29/88
- IPC分类号： H01L29/88 ; F21V9/00
摘要：
A light emitting device according to one embodiment includes a board; plural first light emitting elements mounted on the board to emit light having a wavelength of 250 nm to 500 nm; plural second light emitting elements mounted on the board to emit light having a wavelength of 250 nm to 500 nm; a first fluorescent layer formed on each of the first light emitting elements, the first fluorescent layer including a first phosphor; and a second fluorescent layer formed on each of the second light emitting elements, the second fluorescent layer including a second phosphor. The second phosphor is higher than the first phosphor in luminous efficiency at 50° C., and is lower than the first phosphor in the luminous efficiency at 150° C.
公开/授权文献
- US20120056209A1 LIGHT EMITTING DEVICE 公开/授权日：2012-03-08
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