Title:
灯火制御装置
Document Type and Number:
Japanese Patent JP3999963
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a lamp control device ensuring the turn-off of a lamp when the lamp is controlled to turn off. SOLUTION: The lamp control device includes a pair of current input terminals consisting of a first terminal to which currents are inputted and a second terminal from which the inputted currents are fed back; a switching element connected between the pair of current input terminals for making or breaking a connection between the pair of current input terminals by switching; a voltage drop element connected to one end of the switching terminal; a pair of current output terminals consisting of a third terminal connected to the other end of the voltage drop element and a fourth element connected to the other end of the switching element; and a switching control circuit for controlling the switching element. When the switching element is turned on, voltages across the switching element are shared by the voltage drop element and the lamp connected to the current output terminals, thus ensuring the turn-off of the lamp.
Inventors:
Toshio Tanaka
Kosugi Mitsugu
Kosugi Mitsugu
Application Number:
JP2001344972A
Publication Date:
October 31, 2007
Filing Date:
November 09, 2001
Export Citation:
Assignee:
Toshiba Corporation
Toshiba System Technology Co., Ltd.
Toshiba System Technology Co., Ltd.
International Classes:
B64F1/18; H05B39/04; H05B37/02
Domestic Patent References:
| JP2001211107A | ||||
| JP7065961A | ||||
| JP7094287A |
Attorney, Agent or Firm:
Saichi Suyama