Patent ID: 6474764
Filing Date: 2002-11-05
Classification: B41J

Abstract:
A control circuit for driving a print head of a printing apparatus, the print head comprising a plurality of heating elements and a plurality of corresponding ink chambers, each ink chamber being used for storing ink and having a nozzle, the control circuit comprising:a calculation module for calculating heat-accumulation weightings of the nozzles according to printing data, and generating a total weight based on the heat-accumulation weightings; and a processor for generating a heating signal according to the printing data to drive the heating elements to heat the ink chambers corresponding to the nozzles which will jet ink so as to cause the nozzles to jet ink, and generating a pre-heating signal according to the total weight to drive the heating elements; wherein if the processor is determined to generate the pre-heating signal, the processor will generate the pre-heating signal in addition to generating the heating signal so as to provide additional energy to drive the heating elements corresponding to the nozzles which will jet ink.