Image display apparatus and method for operating the same and lamp unit for image display apparatus

A method for operating an image display apparatus comprising a lamp unit including a discharge lamp and a reflecting mirror for reflecting light emitted from the discharge lamp;

• a ballast circuit for starting and operating the discharge lamp;
• an optical system having the discharge lamp as a light source;
• and a system for controlling the optical system to display an image, wherein
• the ballast circuit includes a start circuit portion electrically connected to the discharge lamp,
• the start circuit portion of the ballast circuit is activated when a power switch included in the image display apparatus is turned on, and
• the system is activated within an operation time during which the start circuit portion is in operation and a re-activation processing operation is not performed as an activation operation of the system after the operation time is over.

An image display apparatus comprising;

• a lamp unit including a discharge lamp and a reflecting mirror for reflecting light emitted from the discharge lamp;
• a ballast circuit for starting and operating the discharge lamp;
• an optical system having the discharge lamp as a light source;
• and
• a system for controlling the optical system to display an image,
• wherein the ballast circuit includes a power circuit portion, an inverter portion, and a start circuit portion,
• the start circuit portion of the ballast circuit is electrically connected to the discharge lamp and is separated from the power circuit portion and the inverter portion,
• the start circuit portion of the ballast circuit is activated when a power switch included in the image display apparatus is turned on, and
• the system is activated within an operation time during which the start circuit portion is in operation and a re-activation processing operation of the system is not performed as an activation operation of the system after the operation time is over.

A lamp unit used for an image display apparatus including an optical system and a system for controlling the optical system to display an image, comprising;

• a discharge lamp;
• a reflecting mirror for reflecting light emitted from the discharge lamp;
• and
• a lamp housing for housing the discharge lamp and the reflecting mirror,
• wherein a start circuit portion included in a ballast circuit for starting and operating the discharge lamp is separated from a power circuit portion and an inverter portion included in the ballast circuit and is provided in the lamp housing.