Mains switch event detection for LED assemblies

摘要

Controller (107) for controlling the illumination state of a light source (108), e.g. solid state lighting devices such as LED or OLED assemblies. The controller (107) is configured to control the light source (108) according to a plurality of illumination states subject to determine an event of a plurality of events. The controller (107) is further configured to control a power converter (125) that converts power derived from an input voltage waveform of a mains power supply (106) into a drive signal for the light source. The controller (107) is further configured to determine an event of a plurality of events encoded within the input voltage waveform of the mains power supply. A first state processor is configured to determine a next illumination state of the plurality of illumination states, based on the determined event and based on the current illumination state. Mains switch event detection (104) is performed while no power is available at the mains terminals.