Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
VEHICULAR LIGHTING DEVICE AND VEHICULAR LIGHTING FIXTURE
Document Type and Number:
Japanese Patent JP2018016191
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a vehicular lighting device capable of securing required total luminous flux and suppressing fluctuation of the total luminous flux even when a voltage applied to the vehicular lighting device is lowered, and a vehicular lighting fixture.SOLUTION: A vehicular lighting device related to one embodiment comprises: a plurality of circuit parts having at least one light-emitting device; and a control part electrically connected to the plurality of circuit parts. The control part detects an input voltage, subjects the plurality of circuit parts to series connection when the input voltage detected exceeds a predetermined value, and subjects at least a part of the plurality of circuit parts to parallel connection when the input voltage detected is equal to the predetermined value or less.SELECTED DRAWING: Figure 5

Inventors:
KOSUGI HIROSHI
HEIKE ATSUSHI
Application Number:
JP2016147673A
Publication Date:
February 01, 2018
Filing Date:
July 27, 2016
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TOSHIBA LIGHTING & TECHNOLOGY
International Classes:
B60Q1/00; H05B44/00; F21V25/04
Domestic Patent References:
JP2014019171A2014-02-03
JP2011526056A2011-09-29
Foreign References:
DE102006024607A12007-11-29
US20140062314A12014-03-06
Attorney, Agent or Firm:
Masahiko Hinataji
Junichi Kozaki
Hiroshi Ichikawa