DIELECTRIC BARRIER DISCHARGE LAMP LIGHTING APPARATUS
A dielectric barrier discharge lamp lighting apparatus includes a plurality of dielectric barrier discharge lamps each of which includes an internal electrode sealed at one end, an external electrode arranged outside of a discharge space of the dielectric barrier discharge lamps, and a ballast circuit for applying a high voltage at high frequency between the internal electrode and the external electrode to operate the plurality of dielectric barrier discharge lamps. The plurality of lamps are arranged in parallel, and arranged so that the position of the internal electrode of each dielectric barrier discharge lamp is at different side in the adjacent dielectric barrier discharge lamps, and at the same sides in every other dielectric barrier discharge lamp. The ballast circuit applies voltages at high frequency with difference in phase to adjacent dielectric barrier discharge lamps.
1 . A dielectric barrier discharge lamp lighting apparatus comprising:
a plurality of dielectric barrier discharge lamps each including a discharge tube and an internal electrode, the plurality of dielectric barrier discharge lamps being oriented such that the internal electrodes are alternately located at opposite ends of adjacent discharge tubes;
an external electrode arranged outside a discharge space of each of the dielectric barrier discharge lamps; and
a ballast circuit for lighting the plurality of dielectric barrier discharge lamps and configured to apply a high frequency voltage between the internal electrode and the external electrode of each dielectric barrier discharge lamp with a phase difference of 90 to 270 degrees between adjacent dielectric barrier discharge lamps.
2 . The dielectric barrier discharge lamp lighting apparatus of claim 1 , wherein the phase difference is set to 180 degrees.
3 . The dielectric barrier discharge lamp lighting apparatus of claim 1 , wherein the interval between adjacent dielectric barrier discharge lamps is 50 mm or less.
4 . The dielectric barrier discharge lamp lighting apparatus of claim 2 , wherein the interval between adjacent dielectric barrier discharge lamps is 50 mm or less.
5 . The dielectric barrier discharge lamp lighting apparatus of claim 1 , wherein the phase difference is set to 90 degrees.