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

摘要

According to an aspect of the invention, a discharge lamp driving device includes a discharge lamp driving section, a control section, and a voltage detecting section. The control section is configured to execute a first discharge lamp driving for executing a first control and a second control for supplying a driving current including a direct current and an alternating current to a discharge lamp. In the first discharge lamp driving, the control section executes the first control when the interelectrode voltage is equal to or smaller than a first threshold voltage at predetermined setting timing and executes the second control when the interelectrode voltage is larger than the first threshold voltage at the predetermined setting timing. A rate of the direct current in the second control is larger than a rate of the direct current in the first control.

主权项

1. A discharge lamp driving device comprising:
a discharge lamp driving section configured to supply a driving current to a discharge lamp; a control section configured to control the discharge lamp driving section; and a voltage detecting section configured to detect an interelectrode voltage of the discharge lamp, wherein the control section configured to execute a first discharge lamp driving for executing a first control and a second control for supplying the driving current including a direct current and an alternating current to the discharge lamp, in the first discharge lamp driving, the control section executes the first control when the interelectrode voltage is equal to or smaller than a first threshold voltage at predetermined setting timing and executes the second control when the interelectrode voltage is larger than the first threshold voltage at the predetermined setting timing, and a rate of the direct current in the second control is larger than a rate of the direct current in the first control.