Ink-jet printing apparatus and ink-jet printing method

An ink-jet printing apparatus to which a print head is mountable for printing an image by driving the print head, the print head having at least a plurality of printing elements configured to generate power for discharging ink and a first detecting element configured to detect a temperature, the ink-jet printing apparatus comprising:

• a second detecting element provided within the ink-jet printing apparatus and configured to detect a temperature;
• a first acquiring unit configured to acquire first information regarding a temperature detected by the first detecting element at a first time point after the print head is mounted to the ink-jet printing apparatus and acquire second information regarding a temperature detected by the first detecting element at a second time point after the first time point and before image printing is started, and acquire third information regarding a temperature detected by the first detecting element at a third time point before the image printing is started;
• a second acquiring unit configured to acquire fourth information regarding a temperature detected by the second detecting element before the image printing is started;
• a third acquiring unit configured to acquire fifth information regarding a correction value for correcting the temperature detected by the first detecting element after the third time point;
• a correcting unit configured to correct the temperature detected by the first detecting element based on the correction value described in the fifth information acquired by the third acquiring unit after the third time point;
• and
• a control unit configured to control driving of the print head based on the temperature corrected by the correcting unit,
• wherein the third acquiring unit (i) acquires the fifth information regarding the correction value based on the temperature described in the third information acquired by the first acquiring unit and the temperature described in the fourth information acquired by the second acquiring unit in a case where a temperature difference between the temperature described in the first information and the temperature described in the second information acquired by the first acquiring unit is lower than a predetermined threshold, and (ii) acquires the fifth information regarding the correction value without using the fourth information acquired by the second acquiring unit in a case where the temperature difference between the temperature described in the first information acquired by the first acquiring unit and the temperature described in the second information is higher than the predetermined threshold.

An ink-jet printing method using an ink-jet printing to which a print head is mountable and having a second detecting element configured to detect a temperature;

• for printing an image by driving the print head, the print head having at least a plurality of printing elements configured to generate power for discharging ink and a first detecting element configured to detect a temperature, the ink-jet printing method comprising:
• first acquiring first information regarding a temperature detected by the first detecting element at a first time point after the print head is mounted to the ink-jet printing apparatus and acquire second information regarding a temperature detected by the first detecting element at a second time point after the first time point and before image printing is started;
• secondly acquiring third information regarding a temperature detected by the second detecting element before the image printing is started;
• thirdly acquiring fourth information regarding a correction value for correcting the temperature detected by the first detecting element after the second time point;
• correcting the temperature detected by the first detecting element based on the correction value described in the fourth information acquired by the third acquiring after the second time point;
• and
• controlling driving of the print head based on the temperature corrected by the correcting,
• wherein the third acquiring (i) acquires the fourth information regarding the correction value based on the temperature described in the second information acquired by the first acquiring and the temperature described in the third information acquired by the second acquiring in a case where a temperature difference between the temperature described in the first information and the temperature described in the second information acquired by the first acquiring is lower than a predetermined threshold, and (ii) acquires the fourth information regarding the correction value without using the third information acquired by the second acquiring in a case where the temperature difference between the temperature described in the first information acquired by the first acquiring and the temperature described in the second information is higher than the predetermined threshold.