Title:
LIGHT EMITTING ELEMENT
Document Type and Number:
WIPO Patent Application WO/2019/225405
Kind Code:
A1
Abstract:
Provided is a light emitting element which emits broadband light, and in which there is little tendency for a light emission intensity spectrum to change over time. This light emitting element is provided with: an LED element which emits excitation light having a single peak wavelength in a range of 380-500 nm; a fluorescent body to which at least a portion of the excitation light is incident, and which emits fluorescent light having a wavelength greater than the excitation light; and a light extraction surface, from which the output light, in which the excitation light and the fluorescent light are superimposed on each other, is output. The output light shows emission of light in a range from at least the peak wavelength of the excitation light to 1050 nm, and shows light emission intensities, all of which are not less than the light emission intensity at 1050 nm, in a range from at least the peak wavelength of the excitation light to 1050 nm.
Inventors:
NAKAMURA KAORU (JP)
KATAOKA KEN (JP)
HATA HIROSHIGE (JP)
KATAOKA KEN (JP)
HATA HIROSHIGE (JP)
Application Number:
PCT/JP2019/019120
Publication Date:
November 28, 2019
Filing Date:
May 14, 2019
Export Citation:
Assignee:
USHIO OPTO SEMICONDUCTORS INC (JP)
International Classes:
H01L33/50; G02B5/20
Domestic Patent References:
| WO2016174236A1 | 2016-11-03 |
Foreign References:
| JP2006060238A | 2006-03-02 | |||
| JPH0829303A | 1996-02-02 | |||
| JP3079932B2 | 2000-08-21 |
Other References:
See also references of EP 3799138A4
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (JP)
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