SYSTEM FOR ESTIMATING THE REMAINING LIFE OF A PRINT CARTRIDGE

摘要

A printing system is described. The printing system includes a printer capable of utilizing print material contained by a cartridge. The printer is capable of detecting when the level of the print material is at a different one of a plurality of pre-determined levels. The printer is also capable of counting pixels. The printer can periodically estimate the remaining life of the cartridge using a reference print material level and the change in pixel count since the print material was at the reference material level.