Driving method for discharge lamp, driving device for discharge lamp, light source device, and image display apparatus

摘要

A driving device for a discharge lamp includes: an alternating current supply section adapted to supply two electrodes of the discharge lamp with an alternating current; and a frequency switching section adapted to periodically switch a frequency of the alternating current supplied by the alternating current supply section, wherein the frequency switching section switches the frequency by differentiating values of the frequency in a plurality of terms in a modulation period, and varies the frequency non-monotonically between a highest frequency term having a highest value of the frequency in the modulation period and a lowest frequency term having a lowest value of the frequency in the modulation period in response to a predetermined condition being satisfied.