Patent ID: 8226211

Claim:
A liquid discharge head which discharges a liquid, comprising: a channel unit including: a first pressure-chamber array in which a plurality of first pressure chambers are aligned in one direction; a second pressure-chamber array which is arranged next to the first pressure-chamber array in an intersection direction intersecting the one direction, and in which a plurality of second pressure chambers are aligned in the one direction; a plurality of nozzles which are formed corresponding to the first and second pressure chambers, respectively, and through which the liquid is discharged; a common liquid chamber storing the liquid which is commonly distributed to the first and second pressure chambers and extending in the one direction; and a plurality of connecting channels through which the liquid is supplied from the common liquid chamber to the first and second pressure chambers, the connecting channels having a plurality of first connecting channels corresponding to the first pressure chambers and a plurality of second connecting channels corresponding to the second pressure chambers; and an actuator unit which selectively applies a discharge pressure to the liquid in the first and second pressure chambers; wherein the first and second pressure chamber arrays are arranged on one side and the other side of the common liquid chamber in the intersection direction, respectively, such that the first and second pressure chambers are arranged in a staggered manner in the one direction; wherein each of the first connecting channels extends in the intersection direction from one of the first pressure chambers in a portion of the channel unit between the second pressure chambers, up to an area, of the channel unit, not overlapped with the common liquid chamber on the other side of the common liquid chamber to make communication with the common liquid chamber; wherein each of second connecting channels extends in the intersection direction from one of the second pressure chambers in a portion of the channel unit between the first pressure chambers, up to an area, of the channel unit, not overlapped with the common liquid chamber on the one side of the common liquid chamber to make communication with the common liquid chamber; and wherein the first connecting channels and the second connecting channels are arranged alternately in relation to the one direction.