According to one embodiment, a control circuit for an inkjet head or the like includes an input circuit configured to receive drive information for driving liquid ejection from a plurality of nozzle arrays. The drive information includes a drive signal value to be supplied to a channel of the plurality of nozzle arrays. A latch circuit array of the control circuit has latch circuits for storing the drive information for each array in the plurality of nozzle arrays. A setting register is configured to receive a setting value to configure the input circuit to correspond to a connection mode for the plurality of latch circuits. The setting value corresponds to the number of arrays in the plurality of nozzle arrays.

A liquid discharge head includes a plurality of discharge holes, a plurality of pressurizing units, a plurality of drive circuits, a switch circuit, and first and second control circuits. The drive signals include a first signal for a pixel of a first size and a second drive signal for a pixel of a second size. The second control circuit controls the switch circuit so that each of the plurality of pressurizing units is connected to the drive circuit outputting the first signal when a droplet forming the pixel of the first size is discharged and is connected to the drive circuit outputting the second signal when a droplet forming the pixel of the second size is discharged. The first control circuit controls the drive circuits so that the drive circuits in charge of outputting the first signal is changed among the plurality of drive circuits.

A liquid discharge head 2 of the present disclosure includes: a flow path member 4 having a plurality of pressurizing chambers 10 connected to respective discharge holes 8, a first common flow path 20 commonly connected to the plurality of pressurizing chambers 10, and a second common flow path 22 commonly connected to the plurality of pressurizing chambers 10; and a plurality of pressurizing units 50 that pressurizes the respective pressurizing chambers 10, in which the first common flow path 20 extends in a first direction and is open to an outside of the flow path member 4 at both end portions, and the second common flow path 22 extends in the first direction and is open to the outside of the flow path member 4 at both end portions.

There are provided a head chip, a liquid jet head, and a liquid jet recording device each capable of ensuring an electrical reliability, and enhancing the durability. The head chip according to an aspect of the present disclosure includes an actuator plate having ejection channels and non-ejection channels extending in a Z direction and arranged alternately in an X direction, and a nozzle plate which has nozzle holes respectively communicated with the ejection channels, and faces the actuator plate. The non-ejection channels are terminated at positions separated from a lower end surface of the actuator plate. The ejection channels open on a lower end surface of the actuator plate.

There are provided a head chip, a liquid jet head, and a liquid jet recording device each capable of ensuring sufficient ejection pressure. The head chip according to an aspect of the present disclosure is provided with an actuator plate provided with first ejection channels and second ejection channels, and a feedback plate disposed on a lower end surface of the actuator plate. The first ejection channels are each surrounded by a pair of upstream drive walls opposed to each other in an X direction. The second ejection channels are each surrounded by a pair of downstream drive walls opposed to each other in the X direction.

A liquid discharge head includes a flow channel member including a first surface and a second surface opposite to the first surface, and a pressing unit on the first surface. The flow channel member includes a first discharge hole and a second discharge hole in the second surface, a first individual flow channel connected to the first discharge hole, a first pressurizing chamber on an upstream side of the first discharge hole in the first individual flow channel, a second individual flow channel connected to the second discharge hole, a second pressurizing chamber on an upstream side of the second discharge hole in the second individual flow channel, and a manifold commonly connected to an upstream side of first individual flow channel and an upstream side of the second individual flow channel. The first individual flow channel and the second individual flow channel have an overlapping portion in plan view.

A liquid discharge head according to an embodiment includes: a flow channel member including a first surface and a second surface located opposite to the first surface, a pressing unit located on the first surface, and a supply member connected to the flow channel member. The flow channel member includes a plurality of discharge holes located in the second surface. The supply member includes, in this order from an upstream side, a first supply flow channel, a first connection flow channel connected to the first supply flow channel, and a reservoir connected to the first connection flow channel, the first connection flow channel being connected to the second surface side of the reservoir.

The head chip includes an actuator plate having ejection channels and non-ejection channels extending in a Y direction and arranged alternately in an X direction, an intermediate plate overlapped with the actuator plate in a Z direction, and provided with communication holes communicated with the ejection channels and through holes communicated with the non-ejection channels, and a nozzle plate overlapped with the intermediate plate in the Z direction in a state of closing the through holes, and provided with nozzle holes which are communicated with the communication holes, jet liquid contained in the ejection channels, and are formed at positions corresponding to the ejection channels. The non-ejection channels are communicated with an outside of the head chip. The through holes are each disposed at an inner side in the X direction of the inner surfaces extending in the Y direction of the non-ejection channel viewed from the Z direction.

A liquid ejection head is provided which comprises a channel member and a housing. The channel member comprises a first surface, which includes one or more ejection ports configured to eject liquid from the first channel member, and a second surface different from the first surface. The housing is disposed on the second surface and comprises one or more electric circuits. The second surface of the channel member comprises a first opening located outside of the housing and is configured to receive the liquid supplied to the one or more ejection ports.

A liquid ejection head having a channel member which includes an ejection hole surface and a pressurization chamber surface opposite thereto. An actuator substrate overlaps the pressurization chamber surface. The channel member includes a plurality of ejection holes opening in the ejection hole surface, a plurality of pressurization chambers individually communicating with the plurality of ejection holes and arranged in plan view of the pressurization chamber surface, and a plurality of dummy pressurization chambers positioned outside of the predetermined region in plan view of the pressurization chamber surface. The actuator substrate includes a plurality of pressurization portions that individually pressurize the pressurization chambers, and a plurality of dummy pressurization portions that individually pressurize the dummy pressurization chambers. The dummy pressurization chambers communicate with each other via a plurality of communication paths. A closed space including the plurality of dummy pressurization chambers and the plurality of communication paths is hermetically closed.