Title:
調光装置
Document Type and Number:
Japanese Patent JP4342387
Kind Code:
B2
Abstract:
To provide a dimmer with which a change of brightness of an incandescent lamp is recognized by those who dim a light regardless of the present dimming rate in stepwise dimming.
When stepwise dimming control is performed with the dimmer, if the difference between the present dimming rate PL and the closest 50% dimming rate level of dimming down steps is less than a predetermined value of difference between dimming rates, for example 5%, the dimmer is adjusted to the next rate level of 25%. With this device, those who dim the light can recognize the change of brightness of the incandescent lamp regardless of the present dimming rate level.
COPYRIGHT: (C)2006,JPO&NCIPI
Inventors:
Tomoyuki Ida
Yoshifumi Ogawa
Yoshifumi Ogawa
Application Number:
JP2004188955A
Publication Date:
October 14, 2009
Filing Date:
June 25, 2004
Export Citation:
Assignee:
Inax corporation
International Classes:
H05B39/04; H05B37/02
Domestic Patent References:
JP2002329586A | ||||
JP3236196A | ||||
JP2004165130A | ||||
JP2148599A |
Attorney, Agent or Firm:
Yoshihisa Shimizu