Abstract: A multiplexed lamp assembly is adapted to be coupled to a source of an alternating current signal, and includes a control unit, and first, second, third and fourth lamp units. The control unit has an input side adapted to be coupled to the source, and an output side with a control line unit. The control unit receives the alternating current signal, and is operable so as to generate first, second, third and fourth control signals at the control line unit. Each of the first, second, third and fourth control signals is generated during a respective one of first, second, third and fourth quadrants of a cycle of the alternating current signal. The first, second, third and fourth lamp units are coupled to the control line unit and are adapted to be coupled to the source.

Abstract: A multiplexed lamp assembly is adapted to be coupled to a source of an alternating current signal, and includes a control unit, and first, second, third and fourth lamp units. The control unit has an input side adapted to be coupled to the source, and an output side with a control line unit. The control unit receives the alternating current signal, and is operable so as to generate first, second, third and fourth control signals at the control line unit. Each of the first, second, third and fourth control signals is generated during a respective one of first, second, third and fourth quadrants of a cycle of the alternating current signal. The first, second, third and fourth lamp units are coupled to the control line unit and are adapted to be coupled to the source.

Abstract: A control device for varying the current flow through a load includes a power supply, a function generator connected to the power source and producing at least one output signal of triangular waveform, and power switching units for modulating the current flow through the load in dependence on the triangular output signal of the function generator so as to attain a smooth fading-in and fading-out effect.