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Title:
VEHICLE LIGHTING FIXTURE SYSTEM AND LIGHTING CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2020/262447
Kind Code:
A1
Abstract:
A first semiconductor light source 102 and a second semiconductor light source 104 are provided in areas with different temperature environments, and are electrically connected in series. A first temperature-sensitive element 106 is provided so as to be capable of detecting the temperature of the first semiconductor light source 102. A second temperature-sensitive element 108 is provided so as to be capable of detecting the temperature of the second semiconductor light source 104. When at least one of a temperature indicated by the first temperature-sensitive element 106 and a temperature indicated by the second temperature-sensitive element 108 deviates from a normal range, a temperature derating circuit 220 acts on a drive circuit 210 so that a drive current is reduced.

Inventors:
YAMAZAKI ATSUSHI (JP)
SASAKI TATSUYA (JP)
Application Number:
JP2020/024762
Publication Date:
December 30, 2020
Filing Date:
June 24, 2020
Export Citation:
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Assignee:
KOITO MFG CO LTD (JP)
International Classes:
B60Q1/00; F21V23/00; F21W103/00; F21W103/25; F21Y115/10
Attorney, Agent or Firm:
MORISHITA Sakaki (JP)
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