Title:
A lighting device and a beacon light
Document Type and Number:
Japanese Patent JP6238010
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a lighting device capable of lightening a light-emitting element at a dimming ratio before change to an output current even in a case where an output current of a constant current AC power supply is set to a reduced output current, and to provide a marker lamp comprising the lighting device.SOLUTION: A lighting device 1 comprises: a switching unit 7 that, when a current detection circuit 6 detects an output current of a first predetermined value from an output current smaller than the first predetermined value depending on first table data within a predetermined time period, or when the current detection circuit 6 detects an output current of a second predetermined value from an output current smaller than the second predetermined value depending on second table data, sets any one of the first and second table data depending on the output current of the first predetermined value or the second predetermined value after a lapse of the predetermined time period; and a control circuit 8 that controls a lightning circuit 5 depending on the output current detected by the current detection circuit 6.
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Inventors:
Shingo Shinno
Koshino Seishi
Koshino Seishi
Application Number:
JP2014075111A
Publication Date:
November 29, 2017
Filing Date:
April 01, 2014
Export Citation:
Assignee:
Toshiba Lighting & Technology Corporation
International Classes:
H05B37/02; F21S2/00
Domestic Patent References:
| JP2004178162A | ||||
| JP2009199857A | ||||
| JP2012155861A |
Attorney, Agent or Firm:
樺澤 襄
Satoshi Kabazawa
Tetsuya Yamada
Kumagai Masatoshi
Satoshi Kabazawa
Tetsuya Yamada
Kumagai Masatoshi