Title:
SEMICONDUCTOR LIGHT-EMITTING DEVICE AND VEHICLE LAMP PROVIDED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2023/176528
Kind Code:
A1
Abstract:
Provided is a light-emitting device in which a change in chromaticity due to a change in the output angle of a light-emitting element combining an LED element and a wavelength converter is suppressed, and the uniformity of chromaticity is improved. An optical multilayer film disposed on the light-emitting element has a transmission spectrum such that, if the angle of a direction perpendicular to the light output surface is 0 degrees and the angle of a direction parallel to the light output surface is 90 degrees, the chromaticity increases monotonically in an angular range of at least 60 degrees from 0 degrees at a peak wavelength of the LED element, increases monotonically in a range of at least 60 degrees from 0 degrees in a longer-wavelength region (650 nm to 700 nm), and the transmittance at 550 nm is more than or equal to 90%.
Inventors:
NIHEI NORIKO (JP)
YAMAJI TOMOAKI (JP)
YAMAJI TOMOAKI (JP)
Application Number:
PCT/JP2023/008165
Publication Date:
September 21, 2023
Filing Date:
March 03, 2023
Export Citation:
Assignee:
STANLEY ELECTRIC CO LTD (JP)
International Classes:
H01L33/58; F21S41/148; F21V9/20; F21V9/30; G02B5/20; H01L33/00; H01L33/50
Foreign References:
| JP2021020634A | 2021-02-18 | |||
| JP2014504030A | 2014-02-13 | |||
| JP2010114218A | 2010-05-20 | |||
| JP2018010958A | 2018-01-18 | |||
| JP2013243306A | 2013-12-05 | |||
| KR101726079B1 | 2017-04-11 |
Attorney, Agent or Firm:
SANNOZAKA PATENT LAW FIRM (JP)
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