Patent ID: 9259921
Filing Date: 2016-02-16
CPC Classification: B41J

Claim Text:
1. An inkjet printing apparatus comprising: a printing head including a substrate including at least a printing element array in which a plurality of printing elements for generating thermal energy used to eject ink from ejection ports are arranged in a predetermined direction and a heating element for heating ink near the printing elements, the heating element being provided near at least one end portion of the printing element array in the predetermined direction; a heating control unit that causes an execution of a first heating that heats ink near the printing elements by causing the heating element to generate a first amount of thermal energy per unit time to drive the printing element and an execution of a second heating that heats ink near the printing elements by causing the printing elements to generate a second amount of thermal energy per unit time larger than the first amount by driving the printing elements to an extent insufficient to cause ink to be ejected from the ejection ports; and a printing control unit that performs control in such a manner that ink ejection from the printing head is started when a temperature of ink near the printing elements reaches a predetermined temperature as a result of the first and second heating caused by the heating control unit, wherein the heating control unit starts driving the heating element at a first time point and starts driving the printing elements at a second time point subsequent to the first time point.