Title:
DIMMING DEVICE
Document Type and Number:
Japanese Patent JP3195803
Kind Code:
B2
Abstract:
PURPOSE: To provide a dimmer with a simple circuit configuration, with which phase control can be made with signals representing the dimming level.
CONSTITUTION: A bidirectional three-terminal thyristor 13 is triggered with inter-end voltage of a capacitor 17 and is phase controlled. The incremental rate of the inter-end voltage of the capacitor 17 varies with the resistance value of a photo-conductive cell 15. This resistance value is controlled by a drive current flowing in an LED 16 in compliance with the input voltage V1.
Inventors:
Hideki Nishikura
Application Number:
JP7977691A
Publication Date:
August 06, 2001
Filing Date:
April 12, 1991
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS,LTD.
International Classes:
H05B37/02; H05B39/08; (IPC1-7): H05B37/02; H05B39/08
Domestic Patent References:
| JP55137695A | ||||
| JP27899U | ||||
| JP6170397U | ||||
| JP58152741U |
Attorney, Agent or Firm:
Keiichiro Saikyo