Title:
DIMMER, LIGHTING DEVICE, AND ILLUMINATING CONTROL SYSTEM
Document Type and Number:
Japanese Patent JP2010192266
Kind Code:
A
Abstract:
To supply power necessary for stable operation of a lighting device while transferring dimming signals through a power source line.
A bidirectional thyristor T54 (a switching element) lies in the way of the power source line 811 supplying alternating-current power to a lighting device 300. A zero-cross detection circuit 120 detects voltage zero-cross of the alternating-current power source AC. A switch control circuit 140 has a dimming-degree directing period consisting of a period of conducting the bidirectional thyristor 54 and a period of insulating the bidirectional thyristor 54 in one half-cycle period, and a power-feeding period for conducting the bidirectional thyristor 54 continuously during one half-cycle period.
Inventors:
IWATSUBO KOKI
MINAGAWA RYOJI
OSHIMA YUICHI
SHIBAHARA SHINICHI
MINAGAWA RYOJI
OSHIMA YUICHI
SHIBAHARA SHINICHI
Application Number:
JP2009035794A
Publication Date:
September 02, 2010
Filing Date:
February 18, 2009
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
MITSUBISHI ELEC LIGHTING CORP
MITSUBISHI ELEC LIGHTING CORP
International Classes:
H05B37/02; H05B41/392
Attorney, Agent or Firm:
Shoji Mizoi
Yoshihisa Yamazaki
Yoshihisa Yamazaki
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