Title:
調光装置およびスタジオ、劇場などにおける調光システムならびに位相制御装置
Document Type and Number:
Japanese Patent JP4095850
Kind Code:
B2
Abstract:
PURPOSE: To provide a light control device without problems of noise and stating delay of a load, and light control system for a studio, theater or the like using the device. CONSTITUTION: The light control device DM is provided with a first phase control circuit PC1 equipped with a self arc-extinguishing control element inserted into an alternate-current power source line 11 and controlling phase of alternate-current voltage, a second phase control circuit PC2 equipped with a thyristor inserted into the alternate-current power source line 11 and controlling phase of the alternate-current voltage, a load current detecting means CD detecting a load current, and a control means directing a power source voltage half-wave to perform a phase control by the first phase control circuit PC1 first, and then, after the load current detected by the load current detecting means CD reaches a given value, making the second phase control circuit PC2 to perform a phase control in place of the first phase control circuit PC1.
More Like This:
| JP2016062763 | LIGHTING CONTROL SYSTEM AND LIGHTING CONTROL METHOD |
| JP5148135 | Liquid crystal display device |
Inventors:
Koji Umeda
Katsuyuki Ide
Keitaro Kosaka
Nobuaki Sekine
Katsuyuki Ide
Keitaro Kosaka
Nobuaki Sekine
Application Number:
JP2002201461A
Publication Date:
June 04, 2008
Filing Date:
July 10, 2002
Export Citation:
Assignee:
Toshiba Lighting & Technology Corporation
Toshiba Lighting Systems Co., Ltd.
Toshiba Lighting Systems Co., Ltd.
International Classes:
H05B37/02; H02M5/257; H05B39/00; H05B39/04
Domestic Patent References:
| JP11185979A | ||||
| JP6325877A |
Attorney, Agent or Firm:
Yoshihiro Onoda