LIGHT EMITTER, WRISTWATCH, AND METHOD FOR MANUFACTURING LIGHT EMITTER

Title:

LIGHT EMITTER, WRISTWATCH, AND METHOD FOR MANUFACTURING LIGHT EMITTER

Document Type and Number:

WIPO Patent Application WO/2022/163604

Kind Code:

A1

Abstract:

[Problem] To provide: a light emitter which enables a color change, in particular, when ultraviolet light is incident; a method for manufacturing the same; and a wristwatch including said light emitter. [Solution] This light emitter is composed of at least a ceramic composite and a fluorescent body. The ceramic composite has two oxide phases, which are a Y3Al5O12 phase an Al2O3 phase, in the form of a lamellar structure. When ultraviolet light having a wavelength of 315-380 nm (exclusive of 380) is incident on the ceramic composite, the ultraviolet light is reflected by the ceramic composite and emitted. Moreover, the ultraviolet light, which is not reflected by the ceramic composite, is transmitted through the ceramic composite and incident on the fluorescent body, and light having the apparent color of the fluorescent body is emitted from the fluorescent body. Furthermore, the color of the light, which is reflected by the ceramic composite and emitted, and the color of the light emitted from the fluorescent body are mixed.

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Inventors:

KOTAKI TOSHIRO (JP)
TANAKA SHOTA (JP)
SASAKI HIROTO (JP)
UCHIUMI HIDEHIRO (JP)

Application Number:

PCT/JP2022/002516

Publication Date:

August 04, 2022

Filing Date:

January 25, 2022

Export Citation:

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Assignee:

ADAMANT NAMIKI PREC JEWEL CO LTD (JP)

International Classes:

C09K11/00; C09K11/08; C09K11/80

Foreign References:

JP2006169422A	2006-06-29
JP2011216543A	2011-10-27
JP2018203909A	2018-12-27
JP2001156336A	2001-06-08
JP2017520917A	2017-07-27
CN102173825A	2011-09-07
JP2004168996A	2004-06-17
JPH08253389A	1996-10-01
JP2019056038A	2019-04-11
JP2005298284A	2005-10-27

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