Title:
WAVELENGTH CONVERSION ELEMENT
Document Type and Number:
WIPO Patent Application WO/2019/098057
Kind Code:
A1
Abstract:
A wavelength conversion element 1 is provided with a substrate section 10, and an optical conversion layer 30 containing optical conversion inorganic particles 40 and an inorganic binder section 50. The inorganic binder section 50 contains particulate binder microparticles 51 having a smaller average particle size than that of the optical conversion inorganic particles 40, and an amorphous binder 52. Where the ratio of a mean volume concentration of the binder microparticles 51 to a mean volume concentration of the optical conversion inorganic particles 40 in a substrate-side portion 31 is defined as a substrate-side binder microparticle concentration ratio RFS, and the ratio of a mean volume concentration of the binder microparticles 51 to a mean volume concentration of the optical conversion inorganic particles 40 in an anti-substrate-side portion 32 is defined as an anti-substrate-side binder microparticle concentration ratio RFO, the substrate-side binder microparticle concentration ratio RFS is greater than the anti-substrate-side binder microparticle concentration ratio RFO.
Inventors:
NAKAMURA MASAHIRO
OKUNO TATSUYA
OKUNO TATSUYA
Application Number:
PCT/JP2018/040818
Publication Date:
May 23, 2019
Filing Date:
November 02, 2018
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G02B5/20; C09K11/08
Domestic Patent References:
| WO2014023617A1 | 2014-02-13 |
Foreign References:
| JP2017215507A | 2017-12-07 | |||
| JP2017215568A | 2017-12-07 | |||
| JP2016034891A | 2016-03-17 | |||
| JP2015089898A | 2015-05-11 | |||
| JP2016034891A | 2016-03-17 | |||
| JP2017221095A | 2017-12-14 |
Other References:
See also references of EP 3712663A4
Attorney, Agent or Firm:
ITO Masakazu et al. (JP)
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