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Patent Searching and Data


Title:
LIGHT EMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/212300
Kind Code:
A1
Abstract:
Provided is a light emitting device in which an increase in manufacturing cost and a decrease in luminous flux are reduced, and short-wavelength light included in white light that is output is attenuated. The light emitting device comprises: a mounting board; a plurality of LED elements which are mounted on the mounting board and output first light having a wavelength not more than the wavelength of blue light; phosphor particles which are excited by the first light to emit second light; and a sealing resin which contains titanium dioxide particles and is filled over the mounting board to integrally seal the plurality of LED elements. The first and the second light are mixed to output white light as output light, wherein the first light is attenuated more than the second light by the titanium dioxide particles as the white light is transmitted through the sealing resin.

Inventors:
WATANABE MASAHIRO (JP)
WATANABE MASAHIDE (JP)
Application Number:
PCT/JP2018/019170
Publication Date:
November 22, 2018
Filing Date:
May 17, 2018
Export Citation:
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Assignee:
CITIZEN ELECTRONICS (JP)
CITIZEN WATCH CO LTD (JP)
International Classes:
H01L33/50; H01L23/28; H01L23/29; H01L23/31; H01L33/58; F21Y115/10
Domestic Patent References:
WO2007018039A12007-02-15
Foreign References:
JP2016066742A2016-04-28
JP2010283244A2010-12-16
JP2016054176A2016-04-14
JP2017059754A2017-03-23
JP2015188075A2015-10-29
JP2018032692A2018-03-01
US20170045201A12017-02-16
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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