Patent ID: 8016433

Claim:
A projector that can be loaded with lamps of a plurality of kinds, each of a plurality of said lamps loadable into said projector being given a lamp serial code formed by arranging lamp information including at least a minimum wattage and a maximum wattage of the lamp and a check sum in predetermined order, said projector comprising: a lamp power supply for driving a lamp loaded in said projector, said lamp power supply being provided in advance with a plurality of mode ranges each as a range from a minimum wattage to a maximum wattage of output of said lamp power supply, and one predetermined mode range of said plurality of mode ranges being freely set in said lamp power supply; and a control circuit for controlling said lamp power supply and checking an accuracy of said lamp serial code using said check sum; wherein said control circuit identifies a range from the minimum wattage to the maximum wattage included in said lamp serial code given to said lamp loaded in said projector as a code range, and compares the code range with said predetermined mode range set in said lamp power supply, said control circuit determines another range that is not below said minimum wattage nor exceeding said maximum wattage included in said lamp serial code as a lamp driving controlling range within which the driving of said lamp power supply is controlled on a basis of a result of comparison of said code range with said mode range, and said control circuit controls the driving of said lamp power supply within the determined lamp driving controlling range.