Invention Grant
- Patent Title: Light-emitting device
- Patent Title (中): 发光装置
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Application No.: US12515372Application Date: 2008-08-01
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Publication No.: US08008673B2Publication Date: 2011-08-30
- Inventor: Hideo Nagai
- Applicant: Hideo Nagai
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Hamre, Schumann, Mueller & Larson, P.C.
- Priority: JP2007-203478 20070803; JP2007-208216 20070809
- International Application: PCT/JP2008/002071 WO 20080801
- International Announcement: WO2009/019836 WO 20090212
- Main IPC: H01L33/00
- IPC: H01L33/00

Abstract:
A light-emitting device 1 includes a base 2 and a light-emitting element 3 that is disposed on the base 2. The light-emitting element 3 is made up of a plurality of semiconductor layers including a light-emitting layer, and at the same time, is covered with a wavelength converting portion 4 that includes a wavelength converting material. The light-emitting layer emits primary light, and the wavelength converting material absorbs part of the primary light and emits secondary light. The luminance of the primary light emitted from the edge portion of the light extraction surface of the light-emitting device 3 is higher than the luminance of the primary light emitted from the inner region located inside the edge portion, and the ratio of the primary light and the secondary light that are emitted from a light extraction surface 6 of the wavelength converting portion 4 is substantially uniform across the light extraction surface 6 of the wavelength converting portion 4. Thereby, a light color difference across the light extraction surface of the wavelength converting portion that covers the light-emitting element can be reduced further, and it is possible to irradiate an irradiation surface with light of uniform color.
Public/Granted literature
- US20100065861A1 LIGHT-EMITTING DEVICE Public/Granted day:2010-03-18
Information query
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