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Patent Searching and Data


Title:
LIGHTING CIRCUIT AND VEHICLE LAMP
Document Type and Number:
WIPO Patent Application WO/2019/188217
Kind Code:
A1
Abstract:
A drive circuit 210 turns a light source 102 on or off by allowing or stopping the flow of a drive current ILED through the light source 102. A determination circuit 224 compares a voltage VLED between both ends of the light source 102 with a threshold Vth and determines in accordance with the comparison results whether the light source 102 is on or off. A first resistance R1 is provided in parallel to the light source 102.

Inventors:
OHTA Shinji (Shizuoka Plant, 500, Kitawaki, Shimizu-k, Shizuoka-shi Shizuoka 64, 〒4248764, JP)
Application Number:
JP2019/009782
Publication Date:
October 03, 2019
Filing Date:
March 11, 2019
Export Citation:
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Assignee:
KOITO MANUFACTURING CO.,LTD. (4-8-3, Takanawa Minato-ku Tokyo, 11, 〒1088711, JP)
International Classes:
H05B37/02
Foreign References:
JP2013219963A2013-10-24
JP2012134549A2012-07-12
JP2018037237A2018-03-08
Attorney, Agent or Firm:
MORISHITA Sakaki (2-11-12, Ebisu-Nishi Shibuya-ku Tokyo, 21, 〒1500021, JP)
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