Patent ID: 6851782
Filing Date: 2005-02-08
Classification: B41J,G03G,G06F,G06K,H04N

Abstract:
1. In a printer having a printhead with nozzles which discharge a dot of ink by means of a firing pulse generated by an actuator and a printhead interface which transfers data to the print head and controls the nozzle firing sequence during printing the method of controlling the image printed by said printhead comprising the steps of: loading viscosity/time data for the ink into a programmable pulse duration table in the printhead interface; loading said nozzles with ink; sensing the temperature of the printhead; generating a temperature signal corresponding to the temperature of the printhead; feeding the temperature signal into said pulse duration table; sensing the voltage available to the actuator generating an available voltage signal corresponding to the voltage available to the actuator; feeding the available voltage signal into said pulse duration table; generating an output signal from said pulse duration table; feeding the output signal to a pulse width generator; and pulsing each nozzle for the appropriate pulse duration, in response to output signal of the pulse width generator.