APPARATUS AND METHOD FOR LIGHTING DIELECTRIC BARRIER DISCHARGE LAMP

摘要

A pair of internal electrodes (2a, 2b) are disposed at both ends of a lamp (1). A first voltage, in which a positive DC voltage (Vb) is superimposed on a substantially rectangular waveform voltage (Va), is applied to one of the internal electrodes. A second voltage, in which a negative DC voltage (-Vb) is superimposed on the substantially rectangular waveform voltage (Va), is applied to the other internal electrode. The dark space occurring substantially at the center in the longitudinal direction of the lamp (1) thereby becomes invisible, so that the brightness distribution is improved.