Patent ID: 9333744
Filing Date: 2016-05-10
CPC Classification: B41J

Claim Text:
1. A liquid ejection head, comprising: a plurality of ejection ports from which a liquid is ejected; a plurality of pressure chambers which communicate with the plurality of ejection ports and are constituted by piezoelectric portions that eject a liquid from the ejection ports by shrink-deforming; a control unit configured to drive the piezoelectric portions so that the pressure chambers shrink-deform; and a first switch for switching, in accordance with the control of the control unit, from an ON state in which a driving state of the piezoelectric portions are maintained to an OFF state in which the driving state is released, and a second switch for switching, when the first switch is switched from the ON state to the OFF state, a connection destination of the piezoelectric portion from the first switch to an abnormality detection unit, wherein the control unit controls driving timing of the piezoelectric portions such that, after any of the plurality of pressure chambers is made to shrink-deform, a pressure chamber disposed not to adjoin the shrink-deformed pressure chamber is made to shrink-deform.