A head alignment apparatus for determining a reference position using position synchronization and aligning a plurality of head modules according to the reference position, and a substrate treating system including the same are provided. The head alignment apparatus may include, a reference position determining unit for determining a first reference position of a head transfer, in which a plurality of inkjet head modules are installed; and a mounting position determining unit for determining a second reference position of the inkjet head module based on the first reference position so that the inkjet head module can be moved from a current position to a second reference position, wherein the reference position determining unit determines a first reference position using a first image sensor installed on the same plane as the inkjet head module and a second image sensor installed facing the inkjet head module.

According to one embodiment, an inkjet head includes a pressure chamber for ink, a nozzle plate including a nozzle connected to the pressure chamber, an actuator to change a volume of the pressure chamber, and a drive circuit that drives the actuator. The drive circuit drives the actuator according to a drive waveform including an expansion waveform, a first weak contraction waveform, a contraction waveform, and a second weak contraction waveform.

According to one embodiment, an inkjet head includes a pressure chamber for ink, a nozzle plate including a nozzle connected to the pressure chamber, an actuator to change a volume of the pressure chamber, and a drive circuit that drives the actuator. The drive circuit drives the actuator according to a drive waveform including an expansion waveform, a first weak contraction waveform, a contraction waveform, and a second weak contraction waveform.

An inkjet printing device according to the present embodiment includes an alignment plate, a substrate positioned on one surface in a third direction of the alignment plate, and an inkjet head combined with the substrate, wherein the alignment plate includes a first position adjustor positioned on a first side surface in a first direction of the alignment plate, and a second position adjustor, a third position adjustor, a fourth position adjustor, a fifth position adjustor, and a sixth position adjustor positioned at a second side surface in a second direction of the alignment plate, and each of the position adjustors adjusts the position of the substrate.

An inkjet printing device according to the present embodiment includes an alignment plate, a substrate positioned on one surface in a third direction of the alignment plate, and an inkjet head combined with the substrate, wherein the alignment plate includes a first position adjustor positioned on a first side surface in a first direction of the alignment plate, and a second position adjustor, a third position adjustor, a fourth position adjustor, a fifth position adjustor, and a sixth position adjustor positioned at a second side surface in a second direction of the alignment plate, and each of the position adjustors adjusts the position of the substrate.

A device includes a plurality of fluid ejection dies, wherein each of the fluid ejection dies includes a contact pad and a plurality of fluid actuation devices. The device includes an electrical interconnect element in contact with the contact pad of each of the fluid ejection dies to electrically interconnect the plurality of fluid ejection dies.

A device includes a plurality of fluid ejection dies, wherein each of the fluid ejection dies includes a contact pad and a plurality of fluid actuation devices. The device includes an electrical interconnect element in contact with the contact pad of each of the fluid ejection dies to electrically interconnect the plurality of fluid ejection dies.

A liquid ejecting head of a side shooter type includes a plate including a plurality of nozzles arranged along a first direction and an actuator with a plurality of pressure chambers arranged along the first direction. Each pressure chamber communicates with a corresponding one of the nozzles. The actuator further includes dummy chambers, each of which is between two otherwise adjacent pressure chambers. Common chambers are provided in the actuator. The pressure and dummy chambers are arranged between the common chambers. The end portions of the pressure chambers are connected to a common chamber. The width of the end portions of each of the pressure chambers is less than the width of a portion of the pressure chamber between the end portions.

A liquid ejecting head of a side shooter type includes a plate including a plurality of nozzles arranged along a first direction and an actuator with a plurality of pressure chambers arranged along the first direction. Each pressure chamber communicates with a corresponding one of the nozzles. The actuator further includes dummy chambers, each of which is between two otherwise adjacent pressure chambers. Common chambers are provided in the actuator. The pressure and dummy chambers are arranged between the common chambers. The end portions of the pressure chambers are connected to a common chamber. The width of the end portions of each of the pressure chambers is less than the width of a portion of the pressure chamber between the end portions.

A liquid discharge apparatus includes a discharge device, a driving device, processing circuitry, and a reading device. The discharge device discharges liquid to a recording medium to form a test pattern. The driving device causes the discharge device to discharge the liquid according to a driving waveform. The processing circuitry inputs a plurality of driving waveforms and acquires first data indicating a standard pattern that corresponds to the driving waveform and is formed with the driving waveform or indicating a parameter of the standard pattern. The reading device reads the test pattern to generate second data. The processing circuitry compares the second data with the first data and selects a driving waveform generating a smallest difference between the second data and the first data, based on a result of comparison of the second data with the first data.