Patent ID: 8378582

Claim:
A plasma lighting system comprising: a magnetron including a plurality of vanes having accommodating recesses at upper and lower end portions and two pairs of straps accommodated in the accommodating recesses such that they are respectively and alternately brought into contact with the accommodating recesses, said magnetron providing oscillating microwaves that have an oscillation frequency determined by the plurality of vanes and the straps; a waveguide connected to the magnetron and having a waveguide space to deliver the microwave; an electrodeless bulb charged with a luminous material and emitting light according to the microwave; a resonator formed to have a mesh form and having a resonance space accommodating the electrodeless bulb and connected to the waveguide; a power source unit configured to convert commercial power into a driving voltage and a filament current and to apply the same to the magnetron; and a control unit configured to output a control signal for converting the commercial power into the driving voltage and the filament current to the power source unit and to provide control to apply a filament current, that has a lower magnitude than that applied at an initial starting stage, to the magnetron when a pre-set normal state arrives.