Title:
LIGHTING DEVICE AND PROJECTION-TYPE IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/064879
Kind Code:
A1
Abstract:
A lighting device has: a first light source unit that includes a plurality of laser elements arrayed so that the light axes thereof are parallel to each other and in a matrix shape, the first light source unit emitting a first light beam in a first direction; a second light source unit including a plurality of laser elements arrayed so that the light axes thereof are parallel to each other and in a matrix shape, the second light source unit being positioned so as to emit a second light beam in the first direction, with a gap from the first light source unit in a second direction orthogonal to the first direction; and a light path shift optical system provided with a first reflection surface that reflects the second light beam emitted from the second light source unit toward the first light beam, and a second reflection surface that is parallel to the first reflection surface, and reflects the second light beam reflected by the first reflection surface so as to be parallel to the first light beam with a second gap therebetween that is smaller than the first gap.
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Inventors:
YAMAGISHI SHIGEKAZU
Application Number:
PCT/JP2021/029329
Publication Date:
March 31, 2022
Filing Date:
August 06, 2021
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G03B21/00; F21S2/00; F21V29/56; G03B21/14; H04N5/74; F21Y115/30
Domestic Patent References:
| WO2020054397A1 | 2020-03-19 |
Foreign References:
| JP2010541001A | 2010-12-24 | |||
| JP2016095486A | 2016-05-26 | |||
| JP2010256494A | 2010-11-11 | |||
| JP2009294639A | 2009-12-17 | |||
| JP2009128689A | 2009-06-11 | |||
| EP1298939A2 | 2003-04-02 | |||
| EP1308767A2 | 2003-05-07 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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