| 摘要 |
In at least one embodiment of the disclosure, a discharge lamp lighting device includes a discharge lamp driving section that drives a discharge lamp and a control unit that controls the discharge lamp driving section. The control unit alternately performs a first-interval DC driving process and a first-interval AC driving process in a first interval, alternately performs a second-interval DC driving process and a second-interval AC driving process in a second interval other than the first interval, and changes a length of at least one of a period during which the first-interval DC driving process is performed and a period during which the second-interval DC driving process is performed so as to be shortened in a stepped manner within a predetermined sub-interval. |
