Patent ID: 8534805

Claim:
A liquid discharge head comprising: plural nozzles configured to discharge liquid droplets; plural liquid chambers in communication with the respective nozzles; a vibration plate member having a deformable vibration area configured to form a part of a wall surface of the liquid chambers, a first projection part provided in the deformable vibration area, and a second projection part provided in a part corresponding to a partition wall between the liquid chambers; and a piezoelectric member having a drive pillar and a non-drive pillar, the drive pillar being bonded to the first projection part, and the non-drive pillar being bonded to the second projection part, wherein a width in a direction in which the nozzles are aligned of a base part of the first projection part is greater than a width in the direction in which the nozzles are aligned of a base part of the second projection part, and a width in the direction in which the nozzles are aligned of the drive pillar is less than a width in the direction in which the nozzles are aligned of the non-drive pillar, and wherein the width in the direction in which the nozzles are aligned of the base part of the first projection part is greater than the width in the direction in which the nozzles are aligned of the drive pillar, and the width in the direction in which the nozzles are aligned of the base part of the second projection part is less than the width in the direction in which the nozzles are aligned of the non-drive pillar.