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Patent Searching and Data


Title:
VEHICLE FRONT LIGHTING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2019/123859
Kind Code:
A1
Abstract:
This vehicle front lighting apparatus is provided with: a lighting device array (10) in which a plurality of lighting devices (LED 1 to LED 12) are serially connected; a plurality of bypass circuits (21); a plurality of switch elements (SW 1 to SW 12); a lighting control unit (22); a current value detection unit (23); a voltage value control unit (24); and a disconnection presence/absence determination unit (25). The voltage value control unit applies a voltage to the lighting device array, and controls a voltage value to be applied so that the value of a current flowing through the lighting device array can be a prescribed target current value. The disconnection presence/absence determination unit determines that disconnection has occurred at one of the plurality of bypass circuits when the number of switch elements controlled so as to light the lighting devices does not match the controlled current value.

Inventors:
FUKATSU YOICHI (JP)
TANAKA TOSHIYA (JP)
ISHIGURO YOSUKE (JP)
TAKENAKA HISANORI (JP)
Application Number:
PCT/JP2018/040930
Publication Date:
June 27, 2019
Filing Date:
November 05, 2018
Export Citation:
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Assignee:
DENSO CORP (JP)
International Classes:
B60Q11/00; B60Q1/04; B60Q1/14; H05B37/02
Foreign References:
JP2017021953A2017-01-26
JP2014170880A2014-09-18
JP2015110357A2015-06-18
Attorney, Agent or Firm:
JIN Shunji (JP)
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