A light-source lamp unit includes a light-source lamp unit detachably
mounted, and a CPU constituting a drive and controller for the
light-source lamp unit. The CPU senses lamp information obtained by a
lamp-information storing block in the light-source lamp unit, pertaining
to a lamp power rating, lamp life and whether a lamp is new or not, and
starts counting operation time when the lamp is lit. The CPU compares the
lamp life sensed and the operation time count, and forces the lamp to
extinguish when the life of the light-source lamp expires. Prior to this
action, the CPU gives a warning display before the life expiration of the
lamp by a fixed duration of time, to warn that lamp replacement is needed.
Because the lamp-information storing block in the light-source lamp unit
stores the information about the lamp type and characteristics of the
lamp, the light-source device can properly drive the lamp to light it and
determine the lamp life even when a light-source lamp unit of a different
type is used.
