Temperature control of ink-jet recording head using heat energy

A recording apparatus comprising:

• a recording head for performing a recording operation by ejecting an ink from an ejection port using heat energy from a driving signal;
• drive means for supplying the driving signal to said recording head;
• ejection quantity control means for controlling an ink ejection quantity ejected from the ejection port by changing the driving signal to be supplied to said recording head;
• temperature measurement means for measuring a surrounding temperature;
• temperature variation calculation means for calculating a variation in temperature of said recording head on the basis of a thermal time constant of said recording head and energy of the driving signal supplied to said recording head by said drive means during a reference period;
• prediction means for performing prediction of a future temperature of said recording head on the basis of the variation in temperature calculated by said temperature variation calculation means and the surrounding temperature measured by said temperature measurement means, said ejection quantity control means controlling the ink ejection quantity by changing the driving signal on the basis of the future temperature predicted by said prediction means;
• and
• ejection stabilization control means for performing ejection stabilization control according to the future temperature predicted by said prediction means, wherein said prediction means performs a following prediction taking into consideration a variation in temperature caused by the ejection stabilization control performed by said ejection stabilization control means.

A recording apparatus comprising:

• a recording head for performing a recording operation by ejecting an ink from an ejection port using heat energy from a driving signal;
• drive means for supplying the driving signal to said recording head;
• temperature measurement means for measuring a surrounding temperature;
• temperature variation calculation means for calculating a variation in temperature of said recording head based on a thermal time constant of said recording head and energy of the driving signal supplied to said recording head by said drive means during a unit time;
• presumption means for performing presumption of the temperature of said recording head based on the variation in temperature calculated by said temperature calculation means, and the surrounding temperature measured by said temperature measurement means;
• and
• ejection stabilization control means for performing ejection stabilization control according to the presumed temperature presumed by said presumption means, wherein said presumption means performs a following presumption taking into consideration a variation in temperature caused by the ejection stabilization control performed by said ejection stabilization control means.

A recording apparatus comprising:

• a recording head for performing a recording operation by ejecting an ink from an ejection port using heat energy from a driving signal;
• drive means for supplying the driving signal to said recording head;
• temperature measurement means for measuring a surrounding temperature;
• temperature variation calculation means for calculating a variation in temperature of said recording head based on a thermal time constant of said recording head and energy of the driving signal supplied to said recording head by said drive means during a reference period;
• prediction means for performing prediction of a future temperature of said recording head based on the variation in temperature calculated by said temperature variation calculation means and the surrounding temperature measured by said temperature measurement means;
• and
• ejection stabilization control means for performing ejection stabilization control according to the future temperature predicted by said prediction means, wherein said prediction means performs a following prediction taking into consideration a variation in temperature caused by the ejection stabilization control performed by said ejection stabilization control means.