Ink-jet printhead, printing apparatus having said printhead, and method of driving said printhead

A printing apparatus for printing on a printing medium by a printhead, said printhead comprising:

• a substrate;
• a plurality of scanning signal lines provided on said substrate;
• a plurality of information signal lines provided on said substrate so as to cross said scanning signal lines;
• a heating element provided at each point of intersection between said scanning signal lines and said information signal lines;
• a first driving circuit for supplying said scanning signal lines sequentially with scanning signals having a first potential within a predetermined driving period;
• and
• a second driving circuit for supplying said information signal lines with select signals, which have a second potential, in accordance with print data, selectively within the predetermined driving period,
• wherein ink droplets are discharged utilizing thermal energy produced by said heating elements owing to a potential difference between the first and second potentials, and
• said first and second driving circuits provide the scanning signals and the select signals respectively with intervals, within the predetermined driving period, in which the potentials of both the scanning signals and the select signals are zero.