Title:
ILLUMINATION DEVICE
Document Type and Number:
Japanese Patent JP2019153484
Kind Code:
A
Abstract:
To provide an illumination device capable of changing a light distribution without the need for a plurality of drive circuits with a simple configuration.SOLUTION: An illumination device includes: a constant-current source, a plurality of LED series circuits and a switch circuit. The plurality of LED series circuits are connected in parallel to the constant-current source, and forward added voltages are equal to each other and light distribution characteristics are different from each other. The switch circuit is configured to select at least one connected with the constant-current source, out of the plurality of LED series circuits.SELECTED DRAWING: Figure 1
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Inventors:
FURUKAWA KENJI
Application Number:
JP2018038270A
Publication Date:
September 12, 2019
Filing Date:
March 05, 2018
Export Citation:
Assignee:
KOITO ELECTRIC IND LTD
International Classes:
H05B37/02; B60Q1/04; B60Q1/12; F21S2/00; F21S41/141; F21S41/663
Attorney, Agent or Firm:
Junichi Omori
Mitsuru Takahashi
Teppei Nakamura
Ori Akira
Masayoshi Sekine
Ayako Kaneko
Shintaro Kanayama
Chiba Ayako
Shiraka Tomohisa
Mitsuru Takahashi
Teppei Nakamura
Ori Akira
Masayoshi Sekine
Ayako Kaneko
Shintaro Kanayama
Chiba Ayako
Shiraka Tomohisa