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 driving current to a discharge lamp provided with a first electrode and a second electrode, and a controller configured to control the discharge lamp driving unit. The driving current includes a first AC period and a second AC period in which an AC current is supplied. The first AC period includes a plurality of consecutive first unit driving periods each of which is formed of a first polarity period and a second polarity period, a length of the first polarity period being larger than a length of the second polarity period. The second AC period includes a plurality of consecutive second unit driving periods each of which is formed of the first polarity period and the second polarity period, the length of the second polarity period being larger than the length of the first polarity period.

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 provided with a first electrode and a second electrode; and a controller configured to control the discharge lamp driving unit, wherein the driving current includes a first AC period and a second AC period in which an AC current is supplied to the discharge lamp, wherein the first AC period includes a plurality of consecutive first unit driving periods each of which is formed of a first polarity period in which the first electrode serves as an anode and a second polarity period in which the second electrode serves as an anode, a length of the first polarity period being larger than a length of the second polarity period, and wherein the second AC period includes a plurality of consecutive second unit driving periods each of which is formed of the first polarity period and the second polarity period, the length of the second polarity period being larger than the length of the first polarity period.