There is provided droplet discharging apparatus including: nozzle configured to discharge liquid by energy generating element; first signal generator configured to generate, based on first and second data representing first and second driving waveforms, first time division multiplex signal; first separator configured to separate first or second driving waveform signal representing the first or second driving waveform from the first time division multiplex signal; second signal generator configured to generate, based on third and fourth data representing third and fourth driving waveforms, second time division multiplex signal; and second separator configured to separate third or fourth driving waveform signal representing the third or fourth driving waveform from the second time division multiplex signal. The energy generating element is driven by the first or second driving waveform signal separated by the first separator, or by the third or fourth driving waveform signal separated by the second separator.

An element substrate comprises a plurality of stages of shift registers that inputs and holds a serial data signal; a latch circuit that latches the serial data held by the shift registers; a decoder circuit that inputs an output of the latch circuit and outputs a selection signal for selecting a block of the print elements or the memory elements; and a mask circuit that masks the output of the selection signal for selecting the block of the memory elements from the decoder circuit in accordance with an input bit data signal. The block of the print elements or the memory elements includes a plurality of print elements or memory elements in which one element is selected in each of the plurality of groups.

A multi-directional single pass printing apparatus may include a print head comprising a collection of slots. The collection of slots may include a central slot for delivering a central slot fluid type, a first serial arrangement of first slots on a first side of the central slot to deliver a first series of respective fluid types and a second serial arrangement of second slots on a second side of the central slot opposite the first side. The second series of slots are to deliver a second series of respective fluid types, wherein the second series of respective fluid types mirror the first series of respective fluid types with respect to the central slot fluid type.

There is disclosed a controller for controlling two or more groups of nozzles in an array, the controller configured to: encode data blocks into a data stream, wherein each data block denotes how a respective group of nozzles is to be controlled for a droplet period; encode fire codes into the data stream, wherein each fire code is a reserved code that denotes when a respective group of nozzles is to be controlled in accordance with the data block for the droplet period; and wherein the data block precedes the fire code for the respective group of nozzles in the data stream and wherein the fire codes are generated independently of the data blocks.

There is provided a printing apparatus including: a nozzle; a head; a signal generating circuit configured to generate, based on at least a first data representing a first driving waveform and a second data representing a second driving waveform different from the first driving waveform, a time division multiplex signal; a separating circuit to which the time division multiplex signal is inputted and which includes a switch configured to separate, from the time division multiplex signal, a first driving waveform signal representing the first driving waveform or a second driving waveform signal representing the second driving waveform, based on a synchronization signal; and a synchronization signal generating circuit configured to generate the synchronization signal indicating an opening and closing timing of the switch. The synchronization signal generating circuit is a circuit different from the signal generating circuit.

An integrated circuit to drive a plurality of fluid actuation devices includes an interface, a digital circuit, an analog circuit, and control logic. The digital circuit outputs a digital signal to the interface. The analog circuit outputs an analog signal to the interface. The control logic activates the digital circuit or the analog circuit.

There is provided a head including: a nozzle plate having a nozzle; a signal generator configured to generate, based on first and second data representing first and second driving waveforms, time division multiplex signal including first and second portions of the first driving waveform, third and fourth portions of the second driving waveform; and separator configured to separate first or second driving waveform signal representing the first or second driving waveform from the time division multiplex signal by performing a sampling. The separator is configured to perform the sampling with a sampling frequency less than a resonance frequency at the nozzle. The energy generating element is configured to be driven by the first or second driving waveform signal separated by the separator.

A multi-directional single pass printing apparatus may include a print head comprising a collection of slots. The collection of slots may include a central slot for delivering a central slot fluid type, a first serial arrangement of first slots on a first side of the central slot to deliver a first series of respective fluid types and a second serial arrangement of second slots on a second side of the central slot opposite the first side. The second series of slots are to deliver a second series of respective fluid types, wherein the second series of respective fluid types mirror the first series of respective fluid types with respect to the central slot fluid type.

According to an example, multi-directional single pass printing may include utilizing a print head that includes slots that include a first slot for a first ink color, and two or more additional slots. A slot of the additional slots may be disposed on a first side of the first slot, and another slot of the additional slots may be disposed on a second side of the first slot. The additional slots may include a further ink color. Data may be forwarded to a set of slots when a direction bit related to the print head is set to a first value, and to another set of slots when the direction bit is set to a second value. A number of channels for forwarding the data to the slots may be less than the number of slots.

Priority order is updated so that an ejection port that is selected as an ejection port subjected to ejection failure determination in a pixel row in which a previous ejection operation is to be performed has the lowest priority order, which is used for selecting an ejection port subjected to ejection failure determination, in a pixel row in which a subsequent ejection operation is to be performed.