Title:
WAVELENGTH CONVERSION ELEMENT AND ILLUMINATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/120409
Kind Code:
A1
Abstract:
This wavelength conversion element for converting irradiated excitation light to light having a different wavelength is provided with a wavelength conversion part having a first surface that is irradiated with the excitation light. The wavelength conversion part includes a plurality of phosphor particles, glass, and a plurality of heat-conductive particles. The glass binds together the plurality of phosphor particles. The plurality of heat-conductive particles each include hexagonal boron nitride and are positioned in the glass at interfaces between the plurality of phosphor particles and the glass and/or between two phosphor particles in the plurality of phosphor particles. Between two phosphor particles arranged in a direction along a first surface from among the plurality of phosphor particles, the plurality of heat-conductive particles include first heat-conductive particles positioned along a direction perpendicular to the first surface.
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Inventors:
NINOMIYA HISAKAZU (JP)
SENOO YUKI (JP)
SENOO YUKI (JP)
Application Number:
PCT/JP2022/046370
Publication Date:
June 29, 2023
Filing Date:
December 16, 2022
Export Citation:
Assignee:
KYOCERA CORP (JP)
International Classes:
G02B5/20; F21V9/30; H01L33/50; F21Y115/10; F21Y115/30
Foreign References:
| JP2021026105A | 2021-02-22 | |||
| JP2008270709A | 2008-11-06 |
Attorney, Agent or Firm:
YOSHITAKE Hidetoshi et al. (JP)
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