Abstract: In a case where the temperature difference between first and second time points detected by a first temperature sensor provided in a print head is lower than a threshold temperature, a temperature correction for the first temperature sensor is performed based on a temperature detected by a second temperature sensor provided within a printing apparatus thereof. In a case where the temperature difference is higher than the threshold temperature, a temperature correction for the first temperature sensor is performed without using the temperature detected by the second temperature sensor.

Abstract: According to an aspect of the present invention, temperatures at a plurality of different positions in an array direction in an ejection opening array are detected, and heating by a heating element is executed in a case where a temperature difference between the temperatures is higher than a predetermined threshold.

Abstract: First heating is started at a first time point, and a second heating having higher heating energy than the first heating is started at a second time point subsequent to the first time point.

Abstract: First heating is started at a first time point, and a second heating having higher heating energy than the first heating is started at a second time point subsequent to the first time point.

Abstract: According to an aspect of the present invention, temperatures at a plurality of different positions in an array direction in an ejection opening array are detected, and heating by a heating element is executed in a case where a temperature difference between the temperatures is higher than a predetermined threshold.

Abstract: The present invention relates to an ink jet recording apparatus including a recording head including a plurality of energy generation elements configured to generate thermal energy. The ink jet recording apparatus includes a specification unit and a control unit. The specification unit specifies a pulse width upper limit value of a prepulse during a recording operation based on a minimum pulse width by which ink is discharged by applying a drive pulse to the energy generation elements and a temperature of the recording head during the recording operation. The control unit controls the energy generation elements to be driven using a drive pulse of a prepulse with a pulse width equal to or less than the pulse width upper limit value.

Abstract: Provided are an inkjet printing apparatus, whereby pulse drive periods and a pause period can be adjusted so as to fall within predetermined periods, while the volume of ink to be ejected is ensured, and a heat generating element driving method therefor. For the inkjet printing apparatus, a pulse signal drive period for a pulse driven previously, a pulse signal drive period for a pulse driven subsequently and a pause period are set to perform ejection of ink droplets one time. When the ejection period exceeds the threshold value, the pulse signal drive period for the pulse driven subsequently and the pause period are reduced to adjust the ejection period to be equal to or lower than a threshold value.

Abstract: An inkjet printing apparatus which performs printing by performing scanning using a print head has a problem in that quality of an image of a ruled line is degraded when ink is not ejected for a certain period of time. To address this problem, control is performed such that power for driving the print head for unit regions including pixels having a ruled-line attribute becomes higher than power for driving the print head for unit regions which do not include the pixels having the ruled-line attribute. By this, a high-quality ruled-line image may be printed.

Abstract: An ink jet printing apparatus inhibits the temperature of a print head from increasing excessively while preventing significant density or hue unevenness from occurring in images, without the need for a complicated structure or complicated control. Thus, the temperature of the print head is detected, and the number of scans in which the print head is to stand by until start of scanning and a standby time for each of the set number of scans by the print head are set, on the basis of the detected temperature.

Abstract: An inkjet printing apparatus and an inkjet printing method are realized which can improve a print quality while minimizing the volume of waste ink, running cost and throughput degradations. For this purpose, the scan width is set according to the size and position of the print medium and then, based on that scan width, a location where the preliminary ejections are to be executed and the number of times that the preliminary ejection is to be executed in a single preliminary ejection session are determined.

Abstract: There is an object of providing a printing apparatus which can restrict a variation in ejection characteristic of an ink droplet due to a temperature change of a printing head to restrict degradation in an image. The printing apparatus adjusts temperatures of the print head to first and second temperature so as to measure ejection characteristics of the print head at the first and second temperature. Then, a driving condition is generated based on the measured ejection characteristics and a printing is performed based on the measured ejection characteristics.

Abstract: An inkjet printing apparatus which performs printing by performing scanning using a print head has a problem in that quality of an image of a ruled line is degraded when ink is not ejected for a certain period of time. To address this problem, control is performed such that power for driving the print head for unit regions including pixels having a ruled-line attribute becomes higher than power for driving the print head for unit regions which do not include the pixels having the ruled-line attribute. By this, a high-quality ruled-line image may be printed.

Abstract: An inkjet recording apparatus predicts the volume of air bubbles generated in a storage section of a recording head based on an input recording job. When the volume of the amount of ink in the storage section of the recording head is less than the predicted volume of air bubbles, a recovery operation is performed.

Abstract: A printing apparatus includes a print unit, an acquisition unit, and a setting unit. The print unit performs printing on a sheet by repeating reciprocating scans of a print head. The acquisition unit acquires information on a temperature of the print head. The setting unit sets a wait time to start a next scan after one scan. The setting unit increases the wait time by a predetermined additional time for each subsequent scan once a value acquired by the acquisition unit exceeds a first threshold, unless the value falls below a second threshold.

Abstract: A printing apparatus, which includes a heating unit for heating a recording medium during printing, determines a pass number for multi-pass printing based on acquired information relating to the duty in each of a plurality of regions in one band of print region. The printing apparatus sets an amount of heat of the heating unit based on the acquired information.

Abstract: An object of the present invention is to provide a printing apparatus and a printing method even with a variation in the temperature of a print head, thus keeping the quality of images resulting from printing high. Adjustment patterns used to adjust the difference in ink ejection timing between ink ejected in a forward direction and ink ejected in a backward direction during scanning are printed at a plurality of different temperatures. Adjustment values for the ink ejection timing at the respective temperatures are selected from the adjustment patterns. Then, the correction value for the ink ejection timing is calculated from the adjustment values based on the temperature detected by the detection device. Printing is then performed with the difference in ink ejection timing between the ink ejected in the forward direction and the ink ejected in the backward direction during scanning, adjusted based on the correction value.

Abstract: A recording apparatus includes a first acquisition unit configured to acquire a speed of ink discharged from a recording head, a second acquisition unit configured to acquire information relating to a speed change based on the speed acquired by the first acquisition unit and a reference speed; a setting unit configured to set driving information relating to the recording head based on the information relating to the speed change acquired by the second acquisition unit, and a drive unit configured to drive the recording head based on the driving information set by the setting unit.

Abstract: An inkjet recording apparatus predicts the volume of air bubbles generated in a storage section of a recording head based on an input recording job. When the volume of the amount of ink in the storage section of the recording head is less than the predicted volume of air bubbles, a recovery operation is performed.

Abstract: Provided are an inkjet printing apparatus, whereby pulse drive periods and a pause period can be adjusted so as to fall within predetermined periods, while the volume of ink to be ejected is ensured, and a heat generating element driving method therefor. For the inkjet printing apparatus, a pulse signal drive period for a pulse driven previously, a pulse signal drive period for a pulse driven subsequently and a pause period are set to perform ejection of ink droplets one time. When the ejection period exceeds the threshold value, the pulse signal drive period for the pulse driven subsequently and the pause period are reduced to adjust the ejection period to be equal to or lower than a threshold value.

Abstract: A printing apparatus, which includes a heating unit for heating a recording medium during printing, determines a pass number for multi-pass printing based on acquired information relating to the duty in each of a plurality of regions in one band of print region. The printing apparatus sets an amount of heat of the heating unit based on the acquired information.