Patent ID: 6505903
Filing Date: 2003-01-14
Classification: B41J

Abstract:
A method for discharging liquid, in which a plurality of discharged liquid droplets are discharged from a same discharge port by using a liquid discharge head, said method comprising the steps of:providing the liquid discharge head comprising a heat-generating body to generate thermal energy for generating a bubble in a liquid, the discharge port through which the liquid is discharged, a liquid flow path communicating with the discharge port and having a bubble generation region to generate the bubble in the liquid, a liquid chamber to supply the liquid flow path with the liquid, a movable member provided in the bubble generation region to be displaced by growth of the bubble, and a controller to control displacement of the movable member within a desired range, with the heat-generating body and the discharge port being in a linear communication arrangement so that the liquid is discharged from the discharge port due to the energy from the bubble generation, the controller being provided facing the bubble generation region of the liquid flow path, and in the liquid flow path the bubble generation region defines a substantially closed space, except the discharge port, by substantial contact between the displaced movable member and the controller; and after commencement of disappearance of the bubble formed by a preceding liquid discharge, and under a state that the bubble remains biased at the discharge port side in the bubble generation region and a portion where the bubble does not exist is given rise at the liquid chamber side of the bubble generation region, generating a bubble in the liquid by supplying the heat-generating body with driving energy for a succeeding liquid discharge.