Printing apparatus and printing control method

A method of controlling printing of a printing apparatus for performing printing by using a printhead on a printing medium, based upon information transmitted from an external device, said method comprising:

• a selection step of selecting one driving element to be driven;
• a detection step of detecting, in 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, and a third wiring structure in which the driving element and a second power-supply wire are serially connected, 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 element and the driving element, and a node between the driving element and the second power-supply wire;
• and
• a control step of obtaining at least one resistance, 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.

A printing apparatus for performing printing by using a printhead on a printing medium, based upon information transmitted from an external device, wherein said printhead comprises:

• any one of voltage detecting means for detecting at least one voltage among voltages at a node between a first power-supply wire and a monitor resistor element, a node between the monitor resistor element and a driving element, and a node between the driving element and a second power-supply wire;
• and
• any one of current application means for applying current to at least one of said nodes,
• wherein at least one resistance is obtained, based upon applied current or 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.