Title:
ILLUMINATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/044711
Kind Code:
A1
Abstract:
Provided is an illumination device formed of semiconductor laser elements that can be safely used even in a cold region etc. The present invention includes: a plurality of semiconductor laser elements; a temperature sensor that measures the ambient temperature of the plurality of semiconductor laser elements; and an electric-current control unit that controls electric-current supply to the semiconductor laser elements, wherein, when a measured value from the temperature sensor is equal to or less than a predetermined first threshold temperature, the electric-current control unit does not supply an electric current equal to or greater than a threshold electric current, which is required to emit laser light, to the semiconductor laser elements until the measured value exceeds the first threshold temperature, and, when the measured value exceeds the first threshold temperature, the electric-current control unit supplies an electric current equal to or greater than the threshold electric current to the semiconductor laser elements.
Inventors:
MOTOIKE TATSUYA (JP)
Application Number:
PCT/JP2020/024618
Publication Date:
March 11, 2021
Filing Date:
June 23, 2020
Export Citation:
Assignee:
USHIO LIGHTING INC (JP)
International Classes:
F21V23/00; F21S2/00; H01S5/042; H01S5/323; H05B47/105; F21Y115/30
Foreign References:
| JP2013168585A | 2013-08-29 | |||
| JP2007201285A | 2007-08-09 | |||
| JP2016131219A | 2016-07-21 |
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (JP)
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