Patent ID: 6820958
Filing Date: 2004-11-23
Classification: B41J

Abstract:
A method for controlling the drive energy of an ink jet print apparatus wherein a print element is driven to eject an ink from an ink jet print head to a printing medium for performing printing, the method comprising:a first step for supplying a plurality of various drive energies for carrying out one ejecting operation successively to ink jet print head; a second step for monitoring temperature of the ink jet print head in each supply of the plurality of various drive energies for carrying out one ejecting operation, the temperature reflecting a temperature change caused by each supplied drive energy; a third step for judging a threshold drive energy between a condition where an ink ejection of the ink jet print head was induced and a condition where the ink ejection of the ink jet print head was not induced using a value for each supplied drive energy and a value for each monitored temperature; a fourth step for determining a drive condition for ejecting ink on the basis of the threshold drive energy; and a fifth step for driving the print element on the basis of the determined drive condition.