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Title:
LASER LIGHT EMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/166789
Kind Code:
A1
Abstract:
A laser light emitting device (10) comprising: a plurality of laser light emitting units (40), the plurality of laser light emitting units each having a laser diode (44), a drive circuit (42) that controls the supply of drive current to the laser diode and drives the laser diode, and a drive line (43) in which the drive current flows from the drive circuit toward the laser diode; and a light emission detection unit (60) that has a detection pattern (62) positioned so that electromagnetically induced current corresponding to the drive current flowing in each drive line flows at the time of light emission by each laser light emitting unit, and that, by detecting the current flowing in the detection pattern, detects light emission of the driven laser diode.

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Inventors:
MIZUNO FUMIAKI (JP)
Application Number:
PCT/JP2021/005190
Publication Date:
August 26, 2021
Filing Date:
February 12, 2021
Export Citation:
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Assignee:
DENSO CORP (JP)
International Classes:
H01S5/042
Domestic Patent References:
WO2020031414A12020-02-13
Foreign References:
JP2009094280A2009-04-30
JP2013070514A2013-04-18
US20030016711A12003-01-23
US20170170626A12017-06-15
Attorney, Agent or Firm:
TOKKYO GYOMUHOJIN MEISEI INTERNATIONAL PATENT FIRM (JP)
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