Provided is a drive method of a liquid discharging head including a first step of acquiring physical property information indicating a physical property of liquid in the liquid discharging head, a second step of determining a waveform of a drive signal based on the physical property information, a third step of forming a first liquid column by supplying a first waveform, which is included in a first drive signal among the drive signals having the waveforms determined in the second step, to a drive element, and a fourth step of, when the first liquid column is formed, forming a second liquid column by supplying a second waveform, which is included in a second drive signal among the drive signals having the waveforms determined in the second step, to the drive element, and thereafter discharging a part or all of liquid constituting the second liquid column as a droplet.

In a printing apparatus, a carriage is reciprocally movable in first and second directions. A control device is configured to perform executing one of first and second printing operations in accordance with an operation mode. The first printing operation prints a first image over a first range in a third direction crossing the first and second directions by ejecting ink from both first and second heads during one movement of the carriage in the first and second directions. The second printing operation prints a second image over a second range narrower than the first range in the third direction by ejecting ink from both the first and second heads during the one movement of the carriage. Ink ejection contribution during the one movement of the carriage is shared by the first and second heads at a prescribed contribution ratio in the second printing operation.

There is provided a liquid discharge apparatus including: a first shift register; a plurality of discharge sections configured to discharge droplets based on head control data; and a first wiring for transmitting the head control data to the first shift register, in which the apparatus is configured to be operated in a first print mode in which printing is performed with a first gradation number, and in a second print mode in which printing is performed with a second gradation number smaller than the first gradation number, based on the head control data, in the first print mode, a data size of the head control data is a sum of a first data size, a second data size, and a third data size, and in the second print mode, a data size of the head control data is a sum of the first data size and the second data size.

There is provided a liquid discharge apparatus including: a discharge section; a first wiring for transmitting a setting information signal group that has a first setting information signal and a second setting information signal and a discharge control signal group; and a second wiring for transmitting a driving signal, in which the apparatus is configured to be operated in a first print mode in which printing is performed with a first gradation number according to the setting information signal group, and in a second print mode in which printing is performed with a second gradation number smaller than the first gradation number, and in the second print mode, the droplets are discharged from the discharge section according to the first setting information signal and the second setting information signal in which bit data of the first setting information signal is inverted.

A liquid ejecting apparatus includes a plurality of ejecting unit groups each including nozzles configured to eject liquid. The ejecting unit group configured to eject a liquid to be used in the printing is referred to as a to-be-used ejecting unit group. The ejecting unit group configured to eject a liquid not to be used in the printing is referred to as the non-use ejecting unit group. In a print mode with a non-use nozzle group in which any of the plurality of kinds of liquids is not used, the driving elements of the to-be-used ejecting unit group is supplied with the in-printing micro-vibration pulse in a period without ejection of the ink, and the driving elements of the non-use ejecting unit group is not supplied with the micro-vibration pulse even in the period without ejection of the ink.

A memory circuit for a print component including a plurality of I/O pads, including an analog pad, to connect to a plurality of signals paths which communicate operating signals to the print component, and a memory component to store memory values associated with the print component. A control circuit to, in response to identifying a sequence of operating signals representing a memory read, provide a first analog signal on the analog pad in parallel with a second analog signal from the print component to provide an analog electrical value on the analog pad representing stored memory values selected by the memory read.

In some examples, a method includes, in response to a fluid firing unit being operated according to a normal printing mode, applying a first voltage to the fluid firing unit to fire the fluid firing unit during a printing operation. The method further includes determining, using a sensor, whether a predetermined condition is met, and in response to determining that the predetermined condition is met, operating the fluid firing unit according to a recovery mode in which a second voltage higher than the first voltage is applied to the fluid firing unit to clean the fluid firing unit.

A liquid discharging apparatus includes a liquid discharging head that discharges a liquid from a nozzle, a control circuit that controls a discharge operation of the liquid discharging head, a nozzle omission detection mechanism that detects a discharge fault of the nozzle, a maintenance mechanism that performs a maintenance operation, which ejects the liquid from the nozzle of the liquid discharging head, and a display device that displays a setting screen relating to the discharge operation of the liquid discharging head. The control circuit executes the discharge operation of the liquid discharging head on the basis of the operation mode selected by a user using the operation mode selection screen for selecting a plurality of operation modes in which a situation in which a transition to the maintenance operation is performed in a case in which the discharge fault is detected, differs, on the display device.

A liquid discharge apparatus uses a drive signal including a micro-vibration waveform which causes the piezoelectric element to micro-vibrate such that an ink is not discharged from the nozzle in a case of being applied to the piezoelectric element as the drive signal and a drive waveform which deforms piezoelectric element such that the ink is discharged from the nozzle in a case of being applied to the piezoelectric element as the drive signal. The presentation unit selectably presents the indirect information from which the ink discharge status can be estimated such as the types of ink and the usage status of the ink or the like. The control unit changes the strength of the micro-vibration caused by the micro-vibration waveform based on the indirect information selected on the presentation unit.

A controller may transition an inkjet printing device, starting from the printing operation, at least predominantly into a continuation mode where the printing is interrupted in which, however, the active tempering of the ink in the one or more print heads of the printing device is continued in order to enable an accelerated restart of the printing operation.