Title:
LIGHTING DEVICE AND THREE-DIMENSIONAL VIDEO DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/281804
Kind Code:
A1
Abstract:
This lighting device comprises: a light source; a lens on which light output from the light source is incident; and a reflector having multiple first reflection regions and reflecting output light from the lens at the respective first reflection regions in a first direction intersecting with an optical axis of the incident light on the lens. The multiple first reflection regions are arranged in steps such that first reflection regions positioned closer to a light-output side of the reflector in the first direction are distanced farther from the lens in a second direction in which the optical axis extends. Light output from a first part of the lens positioned on the light-output side in the first direction with respect to the optical axis has a light distribution angle smaller than the light distribution angle of light output from a second part of the lens positioned on the opposite side from the light-output side in the first direction with respect to the optical axis.
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Inventors:
KATO MASARU (JP)
MIYAIRI HIROSHI (JP)
MIYAIRI HIROSHI (JP)
Application Number:
PCT/JP2022/007347
Publication Date:
January 12, 2023
Filing Date:
February 22, 2022
Export Citation:
Assignee:
NICHIA CORP (JP)
International Classes:
F21S2/00; F21V5/04; F21V5/08; F21V7/09; F21V9/00; F21V13/04; F21V13/12; G02B5/08; G02B5/09; G02B30/33
Foreign References:
| JP2017147025A | 2017-08-24 |
Attorney, Agent or Firm:
HYUGAJI, Masahiko et al. (JP)
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