DISCHARGE LAMP DRIVING DEVICE, PROJECTOR, AND DISCHARGE LAMP DRIVING METHOD

摘要

A discharge lamp driving device includes a discharge lamp driving unit configured to supply a driving current to a discharge lamp including electrodes, a controller configured to control the discharge lamp driving unit, and a voltage detection unit configured to detect an inter-electrode voltage of the discharge lamp, in which the controller controls the discharge lamp driving unit so that the driving current includes a hybrid period in which a first period for supplying an AC current with a first frequency to the discharge lamp and a second period for supplying a DC current to the discharge lamp are alternately repeated, in which the first frequency includes a plurality of different frequencies, and in which the controller changes the first frequency on the basis of at least one of the detected inter-electrode voltage and driving power supplied to the discharge lamp.

主权项

1. A discharge lamp driving device comprising:
a discharge lamp driving unit configured to supply a driving current to a discharge lamp including electrodes; a controller configured to control the discharge lamp driving unit; and a voltage detection unit configured to detect an inter-electrode voltage of the discharge lamp, wherein the controller controls the discharge lamp driving unit so that the driving current includes a hybrid period in which a first period for supplying an AC current with a first frequency to the discharge lamp and a second period for supplying a DC current to the discharge lamp are alternately repeated, wherein the first frequency includes a plurality of different frequencies, and wherein the controller changes the first frequency on the basis of at least one of the detected inter-electrode voltage and driving power supplied to the discharge lamp.