Title:
ONBOARD LIGHTING DEVICE, AUTOMOBILE, AND DIFFRACTION ELEMENT
Document Type and Number:
WIPO Patent Application WO/2023/149211
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing: an onboard lighting device that uses excitation light from a solid light source such as a semiconductor light-emitting element to excite a phosphor region and can efficiently guide the excitation light and fluorescence from the phosphor region to an optical system for use; an automobile that comprises the onboard lighting device; and a diffraction element. According to the present invention, an onboard lighting device that distributes light into the space outside an automobile comprises a light source, a member that diffuses light emitted by the light source, and a diffraction element at which the pitch of a periodic structure gradually changes from the center toward the outside.
Inventors:
ANZAI AKIHIRO (JP)
SAITOH YUKITO (JP)
SAITOH YUKITO (JP)
Application Number:
PCT/JP2023/001370
Publication Date:
August 10, 2023
Filing Date:
January 18, 2023
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
F21V9/40; F21S41/20; F21S41/36; F21S43/20; F21V7/00; F21V9/14; F21V14/04; G02B5/18; G02B5/30; G02B26/10; H01S5/02255; F21W102/13; F21W103/60; F21Y115/30
Domestic Patent References:
| WO2021131709A1 | 2021-07-01 |
Foreign References:
| JP2021107871A | 2021-07-29 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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