Invention Grant
- Patent Title: Light emitting device and light emitting apparatus
- Patent Title (中): 发光装置和发光装置
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Application No.: US12548772Application Date: 2009-08-27
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Publication No.: US08207659B2Publication Date: 2012-06-26
- Inventor: Takahiro Sato , Shinya Nunoue
- Applicant: Takahiro Sato , Shinya Nunoue
- Applicant Address: JP Tokyo
- Assignee: Kabushiki Kaisha Toshiba
- Current Assignee: Kabushiki Kaisha Toshiba
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2008-221593 20080829
- Main IPC: H01J1/62
- IPC: H01J1/62 ; H01J63/04 ; H01L33/00

Abstract:
A light emitting device, includes: a light source; a first wavelength conversion unit absorbing a light-source light radiated by the light source and radiating a first light, a wavelength of the first light being different from a wavelength of the light-source light; and a second wavelength conversion unit dispersedly provided in the first wavelength conversion unit, the second wavelength conversion unit absorbing the light-source light and radiating a second light. An absorptance of the light-source light in the second wavelength conversion unit is higher than an absorptance of the light-source light in the first wavelength conversion unit. A wavelength of the second light is different from the wavelength of the light-source light and different from the wavelength of the first light.
Public/Granted literature
- US20100052504A1 LIGHT EMITTING DEVICE AND LIGHT EMITTING APPARATUS Public/Granted day:2010-03-04
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