| 摘要 |
PROBLEM TO BE SOLVED: To provide a discharge lamp lighting system and a projector incorporating the same enabled to restrain abrupt rise of a lamp power, and alleviate dissolution of a tip of an electrode and degradation of illuminance. SOLUTION: A control device 15, after starting a high-pressure discharge lamp by an igniter 13, finds a power to be supplied to a high-pressure discharge lamp from a voltage equivalent to a lamp voltage detected by a voltage detecting circuit, and a drive current detected by a current detecting circuit, and, if the power is less than a given power value, a down chopper 11 is made to control the drive current so as an increment value of the power per unit of time to be a given value or less. COPYRIGHT: (C)2008,JPO&INPIT |
