Driving device and driving method for discharge lamp, light source device, and projector

摘要

A light source device includes a discharge lamp including a pair of electrodes arranged to be opposed to each other in a hollow section in which a discharge medium is encapsulated and a driving device. The driving device includes a supplying unit configured to supply an alternating current having a frequency higher than 1 kHz to the pair of electrodes in a high-frequency period and a control unit configured to set at least a first frequency higher than 1 kHz and a second frequency higher than 1 kHz and different from the first frequency as the frequency of the alternating current, switch an alternating current having the first frequency and an alternating current having the second frequency in the high-frequency period, and control the supplying unit to repeat the high-frequency period to supply an alternating current to the pair of electrodes.

主权项

1. A driving device that drives a discharge lamp including a first electrode and a second electrode, the driving device comprising:
a current supplying unit configured to supply an alternating current having a frequency higher than 1 kHz to between the first electrode and the second electrode in a high-frequency period in a lighting period of the discharge lamp that is after a warm-up period and during a rated state of operation, wherein the current supplying unit repeats the high-frequency period including a period in which a first high-frequency alternating current having a first frequency between 4 kHz-5 kHz is supplied and a period in which a second high-frequency alternating current having a second frequency between 3 kHz-4 kHz is supplied.