Patent ID: 6582045
Filing Date: 2003-06-24
Classification: B41J

Abstract:
A printing apparatus for performing printing by using a printhead on a printing medium, based upon information transmitted from an external device, said printhead comprising:selection means for selecting one driving element to be driven; a first wiring structure in which the driving element and a monitor resistor element are serially connected; a second wiring structure in which the monitor resistor element and a first power-supply wire are serially connected; a third wiring structure in which the driving element and a second power-supply wire are serially connected; and detecting means for detecting at least one voltage among voltages at a node between the first power-supply wire and the monitor resistor element, a node between the monitor resistor and the driving element, and a node between the driving element and the second power-supply wire, wherein at least one resistance is obtained, based upon the detected voltage, from among resistance of the first and second power-supply wires, resistance of the monitor resistor element and resistance of the driving element, and said printhead is controlled based upon the resistance obtained.