Toner cartridge and control method of displaying the residual toner quantity in the same toner cartridge

A toner cartridge that is configured to be removably attached to an image forming apparatus, comprising:

• a toner container holding toner;
• a toner feed port for supplying the toner from the toner container to the image forming apparatus;
• a toner feeding member that is rotationally driven to supply the toner from the toner container to the image forming apparatus;
• and,
• a recording module for recording history information on the toner container, characterized in that
• the toner container includes a toner feed motor for rotationally driving the toner feeding member;
• the recording module includes a recording portion for recording the history information, a supplied toner quantity totalizer for summing the amounts of toner supplied from the toner feed port, and a residual toner quantity display controller for displaying the residual toner quantity in the toner container on a display portion of the image forming apparatus;
• the recording portion records the initial amount of toner stored in the toner container and a coefficient for the speed of a particular process relative to the predetermined speed of the standard process of the image forming apparatus;
• the supplied toner quantity totalizer has a function of adding up the product of the coefficient multiplied by the drive time of the toner feed motor in supplying toner;
• and,
• the residual toner quantity display controller has a function of calculating the amount of toner remaining in the toner container based on the summation of the products between the coefficient and the drive time, and a function of displaying the residual toner quantity on the display portion of the image forming apparatus.