Patent ID: 8269426
Filing Date: 2012-09-18
Classification: H05B,Y02B

Abstract:
1. A light source apparatus comprising: an arc tube including a first electrode and a second electrode that carry out an emission of light due to a discharge between them; and a drive unit that operates in at least two operation modes, including: (i) a steady operation mode; and (ii) an initial operation mode before operating in the steady operation mode, the initial operation mode including a fusing drive; during the steady operation mode, the drive unit supplying a steady energy in an alternating current to the first electrode and the second electrode; during the initial operation mode, the drive unit supplying energy in an alternating current to the first electrode and the second electrode such that a cumulative energy in an anode period of at least one of the first electrode and the second electrode is greater than a cumulative energy in an anode period of the corresponding electrode during the steady operation mode; and the drive unit, in a launching operation period including at least a period immediately before switching to the steady operation mode, during the time of the fusing drive of the initial operation mode, increasing a value of a current supplied to the at least one of the first electrode and the second electrode as time elapses.