Title:
WAVELENGTH CONVERTER; AND LIGHT EMITTING DEVICE, MEDICAL SYSTEM, ELECTRONIC APPARATUS, AND INSPECTION METHOD USING SAME
Document Type and Number:
WIPO Patent Application WO/2020/217671
Kind Code:
A1
Abstract:
A wavelength converter (1) includes a first phosphor (2) activated by Cr3+ and a second phosphor (3) activated by Ce3+ and/or Eu2+ ions. The fluorescence spectrum of fluorescent light released by the second phosphor (3) has a peak where fluorescence intensity shows a maximum value in the wavelength range 500 nm and above and below 580 nm. The wavelength converter (1) releases fluorescent light having light components across the entire wavelength range from 500 nm and above to less than 580 nm. The wavelength converter (1) releases light with a spectrum in which, in the wavelength range from 550 nm to 700 nm, the ratio of the minimum light emission intensity to the maximum light emission intensity is 40% or less.
Inventors:
ABE TAKESHI
OSHIO SHOZO
NITTA MITSURU
OSHIO SHOZO
NITTA MITSURU
Application Number:
PCT/JP2020/006524
Publication Date:
October 29, 2020
Filing Date:
February 19, 2020
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H01S5/022; A61B1/00; A61B1/07; G02B21/06; G02B23/26; H01L33/50
Domestic Patent References:
| WO2018207703A1 | 2018-11-15 | |||
| WO2018143198A1 | 2018-08-09 | |||
| WO2012069542A1 | 2012-05-31 |
Foreign References:
| JP2006114911A | 2006-04-27 | |||
| JP2018515913A | 2018-06-14 | |||
| JP2018518046A | 2018-07-05 | |||
| JP6461411B1 | 2019-01-30 | |||
| US20160287081A1 | 2016-10-06 | |||
| JP2007017986A | 2007-01-25 | |||
| JP2019082925A | 2019-05-30 |
Other References:
See also references of EP 3961827A4
Attorney, Agent or Firm:
ITO Masakazu et al. (JP)
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