A fluidic die includes fluid chambers, each including an electrode exposed to an interior of the fluid chamber and each having a corresponding fluid actuator operating at a high voltage. The fluidic die further includes monitoring circuitry, operating at a low voltage relative to the fluid actuator, to monitor a condition of each fluid chamber, for each chamber the monitoring circuitry including a connection structure and a select transistor and a pulldown transistor connected to the electrode via the connection structure. The connection structure and select and pulldown transistors together structured to form electrically conductive paths with electrical resistances to protect at least the select transistor from fault damage if the high voltage fluid actuator short-circuits to the electrode.

In accordance with an embodiment, an inkjet head comprises a head section, a clock signal generator, a drive controller and a current measurement section. The head section applies a drive voltage to a wall surface of an ink chamber and ejects ink from the ink chamber. The clock signal generatorsends a clock signal to the head section. The drive controller stops the clock signal sent to the head section, and applies a predetermined drive voltage to the head section. The current measurement section measures a current flowing to the head section while the drive controller stops the clock signal sent to the head section.

A fluid ejection device may include fluid ejectors, fluid pumps to circulate fluid to the fluid ejectors, a first actuation signal line and at least one second actuation signal line. The first actuation signal line is connected to each of the fluid ejectors and each of the fluid pumps along which a first signal is transmittable to actuate a selected one of fluid ejectors and the fluid pumps. The at least one second actuation signal line is connected to the fluid pumps along which a second signal is transmittable to actuate a selected one of the fluid pumps.

A printhead assembly includes ink ejection devices having nozzles and arranged into primitive groups, and processing electronics in communication with the ink ejection devices. The processing electronics including logic to receive data packets for controlling the ink ejection devices. Each data packet includes primitive firing data and fire signal selection data. The processing electronics also include logic to select, for each data packet, a fire signal for application to the primitive groups from among selectable fire signals switchable among the primitive groups based on the fire signal selection data in each respective packet. The processing electronics also include logic to generate the selected fire signals, and to apply the selected fire signals to the ink ejection devices based on the primitive firing data for each data packet.

A nozzle plate for a droplet ejection head, the nozzle plate comprising a first row of nozzles arranged to deposit droplets onto a deposition media; wherein the first row of nozzles extends in a row direction and comprises two or more nozzle clusters, each nozzle cluster being arranged along the row direction for a cluster length c, and extending along a cluster depth direction perpendicular to the row direction by a cluster depth d; wherein each nozzle cluster comprises a plurality of nozzles of which one or more nozzles within each nozzle cluster define the cluster length c and two or more nozzles within each nozzle cluster define the cluster depth d; wherein each nozzle cluster is spaced apart from an adjacent nozzle cluster along the row direction by a cluster spacing a such that an air flow path is created for forced air to pass through the row of nozzles in a controlled manner; and wherein, when the first row is projected in a transverse direction onto the row direction, a transition region between adjacent nozzle clusters comprises two or more nozzles from a first cluster and two or more nozzles from a second cluster, the second cluster being adjacent to the first cluster, and the nozzles in the transition region being equidistantly spaced from one another by a projected nozzle spacing.

According to an embodiment of this invention, the following data transfer between a printhead and a printing apparatus is performed. That is, a priority is set for each of a plurality of data to transfer the plurality of data. Print timings of the printhead are generated in accordance with a relative moving speed between the printhead and a print medium, and the print resolution of the printhead. Data to be transferred to the printhead in an interval between the generated print timing and the next print timing following the print timing are selected from the plurality of data based on the interval, the data length of each of the plurality of data, and the set priorities. The selected data are transferred to the printhead.

A die for a printhead is provided in examples. The die includes a number of fluidic actuator arrays, proximate to a number of fluid feed holes. A number of address lines are disposed proximate to a number of logic circuits on a low-voltage side of the fluid feed holes. An address decoder circuit is coupled to at least a portion of the address lines to select a fluidic actuator in a fluidic actuator array for firing. The address decoder circuit is customized to select a different address for each fluidic actuator in the fluidic actuator array. A logic circuit triggers a driver circuit located in a high-voltage side of the plurality of fluid feed holes opposite the low-voltage side, based, at least in part, on a bit value for the fluidic actuator array, the fluidic actuator selected by the address decoder circuit, and a firing signal.

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.

A recording element substrate for a liquid ejection head is provided with a storage section including an antifuse element and a first resistor connected in parallel with the antifuse element, and a second resistor that is connected in parallel with the storage section and serves as a reference in rating information of the antifuse element, and a second switch connected to the second resistor.

In a printing apparatus including a printhead and a print control unit, wherein the printhead includes two nozzle arrays, each arranged in a first direction and including nozzles arranged along a second direction, the print control unit performs a first operation of expanding print data onto a memory, a second operation of selecting, for each nozzle array, some of the nozzles as non-driving nozzles and the remaining nozzles as driving nozzles, and a third operation of distributing the expanded print data to the two nozzle arrays such that dots corresponding to the non-driving nozzles of one nozzle array are printed by the driving nozzles of the other nozzle array.