| 摘要 |
[Object] To easily activate a high-pressure discharge lamp even if a high-pressure discharge lamp being lighted out prior to achieve a stable lighting is brought into various kinds of states. [Means for Settlement] When power is supplied to a high pressure discharge lamp lighting device 1, a control circuit 5 alternately performs, at activation of the high-pressure discharge lamp 2, with respect to an activation voltage generating circuit 4 which activates a high-pressure discharge lamp 2 by repeatedly supplying a high-voltage pulse for activation to the high-pressure discharge lamp 2, a control to continuously repeat a high-voltage pulse for activation only for a first period of time and a control to stop repeating a high-voltage pulse for activation only for a second period of time, while controlling a power supply circuit 3 which supplies an AC power to the high-pressure discharge lamp 2. If an abnormality detection part 6 detects an abnormal lighting state of the high-pressure discharge lamp 2 and a cumulative period of time for the abnormal lighting state reaches a predetermined period of time, the control circuit 5 makes a ratio of time occupied by the second period of time relative to the first period of time larger by shortening the first period of time. After shortening the first period of time, the control circuit 5 causes the activation voltage generating circuit 4 to operate again so as to continuously repeat a high-voltage pulse for activation. |
