Patent ID: 9061490
Filing Date: 2015-06-23
Classification: B41J

Abstract:
1. A method of driving a liquid ejection head which includes a channel member including a plurality of ejection holes and a plurality of pressurizing chambers respectively connected to the plurality of the ejection holes; and a piezoelectric actuator substrate that is laminated on the channel member so as to cover the plurality of the pressurizing chambers and includes a plurality of pressurizing units respectively pressurizing a liquid in the plurality of pressurizing chambers, in which the channel member includes a plurality of columns of the pressurizing chambers in which the plurality of pressurizing chambers are linearly arranged, and the plurality of columns of the pressurizing chambers are arranged such that the columns of the pressurizing chambers are adjacent to one another in a row direction, wherein driving signals transmitted to the pressurizing units include a main pulse that allows the volume of the pressurizing chambers corresponding to the pressurizing units to be increased, and allows the volume of the pressurizing chambers to be decreased and the liquid to be ejected; a prepulse that is transmitted before one or a plurality of the main pulses are transmitted, allows the volume of the pressurizing chambers to be increased in a period of time shorter than that of the main pulse, and allows the volume of the pressurizing chambers to be decreased and the liquid not to be ejected; and a cancel pulse that is transmitted after one or a plurality of the main pulses are transmitted, allows the volume of the pressurizing chambers to be increased in a period of time shorter than that of the main pulse, and allows the volume of the pressurizing chambers to be decreased and the liquid not to be ejected, the driving signals concurrently begin to be transmitted to the pressurizing units corresponding to the respective columns of the pressurizing chambers and the driving signals are transmitted with delays between the adjacent columns of the pressurizing chambers, and the driving signal transmitted to each of the pressurizing units, is at least one of the cases in which signals that allow the volume of the pressurizing chambers of the prepulse to be decreased are transmitted while the main pulse or the cancel pulse transmitted to the pressurizing units corresponding to the pressurizing chambers adjacent to one another in the row direction with respect to the pressurizing chambers is transmitted, or signals that allow the volume of the pressurizing chambers of the cancel pulse to be increased are transmitted while the main pulse or the prepulse transmitted to the pressurizing units corresponding to the pressurizing chambers adjacent to one another in the row direction with respect to the pressurizing chambers is transmitted.