Title:
White luminescent device
Document Type and Number:
Japanese Patent JP5990911
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a white light-emitting device in which variation of chromaticity of emitted light is suppressed by a combination of phosphor.SOLUTION: The white light-emitting device includes a light-emitting element which emits blue light having a wavelength in a range of 420-490 nm, and a phosphor layer including a first phosphor activated with Ce, having a maximal value of absorption spectral characteristics in a wavelength range of 420-490 nm and excited with light emitted from the light-emitting element to radiate fluorescent light of first wavelength, and a second phosphor activated with Eu, and excited with light emitted from the light-emitting element to radiate fluorescent light of second wavelength.
Inventors:
Murofushi Hitoshi
Takashi Yoshida
Hideyuki Watanabe
Takashi Yoshida
Hideyuki Watanabe
Application Number:
JP2012005757A
Publication Date:
September 14, 2016
Filing Date:
January 16, 2012
Export Citation:
Assignee:
Sanken Electric Co., Ltd.
International Classes:
H01L33/50; C09K11/08; C09K11/59; C09K11/64; C09K11/78; C09K11/79
Domestic Patent References:
| JP2007123946A | ||||
| JP2010100743A | ||||
| JP2006253336A |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Iwa Saki Kokuni
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu
Iwa Saki Kokuni
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu