Title:
白色発光装置および照明装置
Document Type and Number:
Japanese Patent JP6763071
Kind Code:
B2
Abstract:
Provided is a white light emitting device capable of preventing that a specific wavelength region protrudes at a light emission spectrum, and enabling an appearance with a color tone similar to sunlight. A white light emitting device includes a light-emitting diode emitting light having a light emission intensity peak at a wavelength region of from 350 to 490 nm and a phosphor layer emitting white light in response to excitation by the light of the light-emitting diode. The phosphor layer includes a plurality of phosphors each having a light emission intensity peak different from one another at a wavelength region of from 420 to 700 nm.
Inventors:
Masahiko Yamakawa
Nakagawa victory
Yasuhiro Shirakawa
Kyomasa Oya
Masami Okamura
Nakagawa victory
Yasuhiro Shirakawa
Kyomasa Oya
Masami Okamura
Application Number:
JP2019160569A
Publication Date:
September 30, 2020
Filing Date:
September 03, 2019
Export Citation:
Assignee:
Toshiba Corporation
Toshiba Materials Co., Ltd.
Toshiba Materials Co., Ltd.
International Classes:
H01L33/50; A61C19/00; F21V9/08; F21V9/32; F21V9/38
Domestic Patent References:
| JP2003203504A | ||||
| JP2005502083A |
Foreign References:
| WO2012108065A1 | ||||
| US20110220920 |
Attorney, Agent or Firm:
Patent Business Corporation Sakura International Patent Office