| 摘要 |
PROBLEM TO BE SOLVED: To provide a light control circuit in which an entire is operated by supplying power to the light control circuit by utilizing an AC power supply such as a commercial power source, being capable of controlling light with a load by utilizing a light controller.SOLUTION: When controlling light, a power controller is controlled with a stable operation voltage for outputting a drive voltage to a load by making selection between cases: if operation voltage of a drive controller is equal to or larger than a threshold value, a rectifier or a power controller provides a first power source to the drive controller with an AC voltage having been adjusted by a light controller, and then based on changes in DC voltage, adjusts a drive voltage through the power controller to drive a load; and if the operation voltage of the drive controller is smaller than the threshold value, a second power source is provided to the drive controller from a battery. Thus, the problem that flickering occurs when a conduction angle is small is solved, to be able to adaptive to a light controller of any type. |
