Ink jet printing apparatus and print head temperature control method

摘要

An ink jet printing apparatus performs printing on a print medium, and includes a print head having a plurality of ejection openings, a head temperature acquisition unit that acquires a temperature of the print head, and a heating unit configured to heat the print head. In addition, a control unit is configured to control the heating unit so as to cause a temperature of the print head to be a target temperature, at start of a print scan by the print head, and a setting unit is configured to set the target temperature. If a completion temperature acquired by the acquisition unit at a time when a previous print scan is completed is lower than a threshold temperature, the setting unit sets a temperature higher than the completion temperature as the target temperature, and if the completion temperature is equal to or higher than the threshold temperature, the setting unit sets a temperature lower than the completion temperature as the target temperature.

主权项

1. An ink jet printing apparatus that performs printing on a print medium, said apparatus comprising:
a print head having a plurality of ejection openings; a head temperature acquisition unit configured to acquire the temperature of said print head, including a completion temperature at a time when a print scan is completed and a before-subsequent scan temperature at a time before a subsequent print scan; a heating unit configured to heat said print head; a setting unit configured to set a target temperature, wherein
(i) if the completion temperature is lower than a threshold temperature, said setting unit sets the target temperature higher than the completion temperature; and(ii) if the completion temperature is greater than or equal to the threshold temperature, said setting unit sets the target temperature lower than the completion temperature; and a control unit configured to (i) start a subsequent print scan by said print head after said heating unit heats said print head to the target temperature, if the before-subsequent scan temperature is lower than the target temperature, and (ii) start the subsequent print scan by said print head without waiting for the temperature of said print head to be the target temperature, if the before-subsequent scan temperature is greater than or equal to the target temperature.