高圧放電灯点灯装置及び高圧放電灯の点灯方法

Japanese Patent JP4605551

B2

When a high-voltage discharge lamp is lit, the lamp voltage is maintained within an appropriate range.  A high-voltage discharge lamp lighting apparatus for AC-lighting a high-voltage discharge lamp having a pair of electrodes comprises a control means for controlling the lighting frequency of the AC lighting, and a determining means for determining a lamp voltage of the high-voltage discharge lamp.  Under the control of the control means: the lamp is lit using a first frequency (f1) as a main lighting frequency; thereafter, when the lamp voltage exceeds a predetermined value, the n-th frequency (fn) (2=n, f(n-1)