| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a dimming device of low cost, in which construction is made easy while preventing construction mistakes. <P>SOLUTION: The dimming device A is provided with: power feeding parts 2<SB>1</SB>-2<SB>5</SB>which have a phase control function to control conduction phase angle of an AC voltage to be supplied to light sources La1-La5 and supply power respectively to the light sources La1-La5; dimming signal output parts 3<SB>1</SB>-3<SB>5</SB>respectively installed corresponding to power feeding parts 21-25 and output a dimming signal to a dimming lighting circuit which dimming-lights the light sources La1-La5; a detection part 8 which detects whether or not the signal line from the dimming lighting circuit is connected to each dimming signal output part 3<SB>1</SB>-3<SB>5</SB>; and a CPU 1 which establishes operation of each power feeding parts 2<SB>1</SB>-2<SB>5</SB>to either an operation to phase control or an operation to turn on or off the output based on the detection result of the detection part 8. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
