초록 ▼

System for controlling operation of a plurality of gaseous discharge lamps for selectively turning on or off one or more of the lamps and producing desired lumen output of the lamps as needed, to provide for conservation of electrical energy. In the system, each of the discharge lamps is connected t

System for controlling operation of a plurality of gaseous discharge lamps for selectively turning on or off one or more of the lamps and producing desired lumen output of the lamps as needed, to provide for conservation of electrical energy. In the system, each of the discharge lamps is connected to a separate variable impedance ballast device, a control circuit for varying the impedance of each ballast device, and a signal processing circuit connected to each control circuit for operating the same, and a signal transmitting device for transmitting information to each of the signal processing circuits, whereby the latter circuits selectively operate the respective control circuits in response to the information received from the signal transmitting device. In a preferred embodiment, the signal transmitting device is a remote transmitter such as a radio frequency signal device for remote control of the lighting system.

대표청구항 ▼

Lighting control system comprising, in combination, a plurality of gaseous discharge lamp loads connected in parallel, voltage supply means for said lamp loads, a plurality of variable impedance ballast means connected between said voltage supply means and each said lamp load, a plurality of control

Lighting control system comprising, in combination, a plurality of gaseous discharge lamp loads connected in parallel, voltage supply means for said lamp loads, a plurality of variable impedance ballast means connected between said voltage supply means and each said lamp load, a plurality of control means respectively connected to said plurality of variable impedance ballast means for controlling the light level of said lamp loads, signal means for transmitting information signals, and a plurality of signal processing means arranged to receive information signals from said signal means and connected respectively to said plurality of control means for operating each said control means in response to the received information signals, said ballast means comprising a pair of inductively coupled coils, one of said coils arranged in series with said lamp load, the other of said coils connected to said control means for control of the current in said one coil.