Patent ID: 9131581
Filing Date: 2015-09-08
Classification: H05B

Abstract:
1. A dimming and correlated color temperature (CCT) tuning controller, comprising: power input terminals connected to AC mains; an AC current return controller; a dimming input; a CCT tuning input; a voltage sensing circuit connected to the power input terminals and configured to determine a voltage peak of the AC mains; a modulator configured to convert an AC power from the AC mains into a dimming and CCT tuning output power having a dimming and CCT tuning signal portion embedded therein; and a dimming and CCT tuning signal generator configured to receive a signal from the voltage sensing circuit and signals from the dimming input and the CCT tuning input, wherein in response to the dimming and CCT tuning signal generator sensing a change in either a dimming or a CCT tuning signal from either the dimming input or the CCT tuning input, the dimming and CCT tuning signal generator sends a first set of control signals to the AC current return controller and the modulator to control and modulate the dimming and CCT tuning signal portion to form the dimming and CCT tuning output power; and wherein in response to the dimming and CCT tuning signal generator sensing no change in the dimming signal and CCT tuning signal from either the dimming input or the CCT tuning input, the dimming and CCT tuning signal generator sends a second set of control signals to the AC current return controller and the modulator to turn off the modulator.