Patent ID: 7993015
Filing Date: 2011-08-09
Classification: G03B,H04N

Abstract:
1. 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 on the lamp and a check sum in predetermined order, said projector comprising: a control circuit to perform a clocking operation of a lamp timer to manage a use time of said lamp loaded in said projector; and a memory to store information, wherein when said lamp loaded in said projector is replaced with a predetermined lamp, said control circuit receives input of said lamp serial code attached to the predetermined lamp, by checking a part corresponding to said check sum in information input as said lamp serial code, said control circuit determines whether the input information is a valid said lamp serial code, when said control circuit determines that the input information is a valid said lamp serial code, said control circuit resets said lamp timer, and resumes the clocking operation of said lamp timer, and said control circuit stores, in said memory, contents of said lamp serial code and a clocked time of said lamp timer as log history data for said predetermined lamp with which replacement has been made.