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Title:
VEHICULAR LED LIGHTING CONTROL CIRCUIT, VEHICULAR LED LIGHTING CONTROL DEVICE, AND METHOD FOR CONTROLLING VEHICULAR LED LIGHTING CONTROL CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/163074
Kind Code:
A1
Abstract:
This vehicular LED lighting control circuit is provided with a switch circuit for switching between a first state, in which electrical continuity is established between a switching node and a first contact connected to an intermediate node, and a second state, in which electrical continuity is established between the switching node and a second contact connected to the other end of an auxiliary adjustment resistor. According to a vehicular LED lighting control device, when voltage controlled to be a constant voltage is supplied, it is possible to stabilize an LED current even if the number of stages of LED elements that are turned on among LED elements connected in series is changed.

Inventors:
TAKASHIMA Toyotaka (10-13, Minami-cho, Hanno-sh, Saitama 85, 〒3578585, JP)
KAMIMURA Tomoyuki (10-13, Minami-cho, Hanno-sh, Saitama 85, 〒3578585, JP)
Application Number:
JP2018/006624
Publication Date:
August 29, 2019
Filing Date:
February 23, 2018
Export Citation:
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Assignee:
SHINDENGEN ELECTRIC MANUFACTURING CO., LTD. (2-1 Ohtemachi 2-chome, Chiyoda-ku Tokyo, 04, 〒1000004, JP)
International Classes:
B60Q1/04; B60Q1/26; B60Q11/00; B62J6/00; H01L33/00; H05B37/02
Attorney, Agent or Firm:
NAGAI Hiroshi et al. (Kyowa Patent & Law Office, Nippon Life Marunouchi Building 1-6-6, Marunouchi, Chiyoda-k, Tokyo 05, 〒1000005, JP)
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