Abstract: A printer controller for supplying data to a printhead module including at least one row of printhead nozzles, at least one row including at least one displaced row portion, the displacement of the row portion including a component in a direction normal to that of a pagewidth to be printed, the printer controller being configured to control order and timing of the data supplied to the printhead such that the dropped row is compensated for during printing by the printhead module.

Abstract: A printhead IC for an inkjet printer that mounts the printhead IC together with at least one other like printhead IC to provide a pagewidth printhead for printing onto a media substrate fed past the printhead in a feed direction, the printhead IC comprising: an elongate array of nozzles, the nozzles arranged into rows, at least one of the rows having a first section positioned on a line extending perpendicular to the feed direction, a second section positioned along a parallel line displaced from the first section, and an intermediate section of nozzles extending between the first section and the second section; and a supply conduit for providing printing fluid to the first section, the second section and the intermediate section, the supply conduit having a first portion extending perpendicular to the feed direction for supplying the first section of nozzles, a second portion extending perpendicular to the feed direction for supplying the second section of nozzles and an inclined portion for supplying the in

Abstract: A printer controller is provided for supplying dot data to at least one printhead module and at least partially compensating for errors in ink dot placement by at least one of a plurality of nozzles on the printhead module due to erroneous rotational displacement of the printhead module relative to a carrier. The printer controller is configured to determine the rotational displacement, determine at least one correction factor that at least partially compensates for an error in ink dot displacement caused by the determined rotational displacement, and alter the output of the ink dots based on the correction factor to at least partially compensate for the rotational displacement. The correction factor is at least partially based on a thickness of media being printed on.

Abstract: An inkjet printhead is provided having inkjet printhead modules arranged to successively abut one another and controllers for controlling the printhead modules. A first controller is configured to receive and process print data to generate first ink dot data and a second controller is configured to receive and process print data and at least some of the first dot data to generate second ink dot data. The first controller is arranged to output the first dot data to at least a first printhead module and the second controller. The second controller is arranged to output the second dot data to at least a second printhead module.

Abstract: An inkjet printer is provided which has a printhead module and printer controller. The printhead module has a plurality of inkjet nozzles, with at least one of the nozzles being rotationally displaced relative to a carrier of the printhead module. The printer controller determines and communicates ink dot data to the inkjet nozzles, and is configured to determine the rotational displacement, determine at least one correction factor that at least partially compensates for an error in ink dot displacement caused by the determined rotational displacement, and alter the output of the ink dots based on the correction factor to at least partially compensate for the rotational displacement. The correction factor is at least partially based on a thickness of media being printed on.

Abstract: A printer controller for supplying dot data to at least one printhead module and at least partially compensating for errors in ink dot placement by at least one of a plurality of nozzles on the printhead module due to erroneous rotational displacement of the printhead module relative to a carrier, the printer being configured to access a correction factor associated with the at least one printhead module; determine an order in which at least some of the dot data is supplied to at least one of the at least one printhead modules, the order being determined at least partly on the basis of the correction factor, thereby to at least partially compensate for the rotational displacement; and supply the dot data to the printhead module.

Abstract: A method of at least partially compensating for errors in ink dot placement by at least one of a plurality of nozzles due to erroneous rotational displacement of a printhead module relative to a carrier, the nozzles being disposed on the printhead module, the method comprising the steps of determining the rotational displacement; determining at least one correction factor that at least partially compensates for the ink dot displacement; and using the correction factor to alter the output of the ink dots to at least partially compensate for the rotational displacement.

Abstract: A printer controller is provided for supplying one or more control signals to a printhead module. The printhead module includes at least one row that has a plurality of adjacent sets of n?1 adjacent nozzles. Each of the nozzles is configured to expel ink in response to a fire signal. The printer controller is configured to supply, for each set of nozzles, a fire signal in accordance with the sequence: [nozzle position 1, nozzle position n, nozzle position 2, nozzle position (n+1), . . . , nozzle position (n?1), nozzle position (2n?1)].

Abstract: A printhead IC for an inkjet printer that mounts the printhead IC together with at least one other like printhead IC to provide a pagewidth printhead for printing onto a media substrate fed past the printhead in a feed direction, the printhead IC comprising: an elongate array of nozzles, the nozzles arranged into rows, at least one of the rows having a first section positioned on a line extending perpendicular to the feed direction, a second section positioned along a parallel line displaced from the first section, and an intermediate section of nozzles extending between the first section and the second section; and a supply conduit for providing printing fluid to the first section, the second section and the intermediate section, the supply conduit having a first portion extending perpendicular to the feed direction for supplying the first section of nozzles, a second portion extending perpendicular to the feed direction for supplying the second section of nozzles and an inclined portion for supplying the in

Abstract: A printhead IC for an inkjet printer, the inkjet printer having a PEC for sending print data to the printhead IC in accordance with a predetermined data transmission protocol, the printhead IC comprising: an array of nozzles for ejecting drops of printing fluid onto a media substrate; and, drive circuitry for driving the array of nozzles; wherein, the circuitry is configured to receive print data in any one of a plurality of different data transmission protocols.

Abstract: A printhead IC comprising: an array of nozzles; drive circuitry for receiving print data and sending drive pulses of electrical energy to the array of nozzles in accordance with the print data; and, a temperature sensor connected to the drive circuitry to adjust the drive pulse profile in response to the temperature sensor output; wherein during use, the temperature sensor can be de-activated after a period of use.

Abstract: A printhead IC comprising: an array of nozzles; and, drive circuitry for receiving print data and sending drive pulses to the nozzles in accordance with the print data; wherein, the drive pulses consist of ejection pulses with sufficient energy to eject printing fluid from the nozzles designated to fire at that time, and sub-ejection pulses with insufficient energy to eject printing fluid from the nozzles not designated to fire at that time.

Abstract: A printhead IC for an inkjet printer, the inkjet printer having a print engine controller (PEC) for sending print data to the printhead IC, the printhead IC comprising:an array of nozzles for ejecting drops of printing fluid onto a media substrate; and,drive circuitry for driving the array of nozzles, the drive circuitry being configured for connection to a power source in the printer; wherein,the drive circuitry being configured to reset itself to a known initial state in response to receiving power from the power source after a period of not receiving power from the power source.

Abstract: A printhead IC comprising: an array of nozzles; an ejection actuator corresponding to each of the nozzles respectively, the ejection actuator having a resistive heater that is activated when the actuator ejects ink through the corresponding nozzle;drive circuitry for receiving print data and activating the actuators with drive signals in accordance with the print data; and,open actuator test circuitry for selectively disabling the actuators when they receive a drive signal while comparing the resistance of the resistive heater to a predetermined threshold to assess whether the actuator is defective.

Abstract: An inkjet printer comprising: an array of nozzles arranged into rows, each row consisting of a plurality of nozzle groups, the nozzles in each group being interspersed with nozzles from the other groups; and, associated drive circuitry for actuating the nozzles in the row in accordance with a firing sequence, the firing sequence enabling the nozzles in each group to eject printing fluid simultaneously, and enabling each of the groups to eject printing fluid in succession; wherein, the nozzles in each group are spaced from each other by at least a predetermined minimum number of nozzles and, each of the nozzles in a group is spaced from the nozzles in the subsequently enabled group by at least the predetermined minimum number of nozzles.

Abstract: A printhead IC comprising: an array of nozzles; and, drive circuitry for sending an drive pulse to each of the nozzles individually such that they eject a drop of printing fluid; wherein, the drive circuitry adjusts the drive pulses sent to the nozzles in accordance with the temperature of the printing fluid within the nozzles.

Abstract: A printhead IC comprising: an array of nozzles; drive circuitry for receiving print data and fire commands from a print engine controller; wherein during use, the drive circuitry receives the print data for the array in a plurality of sequential portions with a fire command at the end of each portion.

Abstract: An inkjet printer comprising: a printhead with a plurality of printhead IC's, each having an array of nozzles for ejecting drops of printing fluid, and drive circuitry for driving the array of nozzles;a print engine controller for sending print data to the printhead IC's; an interface for electrical communication between the print engine controller and the printhead IC's; wherein, all the printhead IC's have a common initial address except one printhead IC at the end of the printhead, the exception having a different address such that the print engine controller sends a first broadcast instruction to any printhead IC's having the different address, the first broadcast instruction instructing the printhead IC having the different address to change its address to a first unique address, the printhead IC's being interconnected such that when the exception has undated its address, the address of the adjacent printhead IC changes to the different address so that a second broadcast command changes the write address

Abstract: An inkjet printer comprising: an array of nozzles arranged into rows, each row of nozzles is divided into a series of groups; and, drive circuitry for sending a drive pulse to each of the nozzles individually such that they eject a drop of printing fluid; wherein, the drive circuitry delays sending the drive pulses to one of the groups relative to at least one of the other groups.

Abstract: A printhead IC comprising: an array of nozzles, each with a corresponding heater to form a vapor bubble in printing fluid that causes a drop of the printing fluid to eject through the nozzle; and, drive circuitry for generating drive pulses that energize the heaters, the drive circuitry being configured to operate in two modes, a printing mode in which the drive pulses it generates are printing pulses, and a maintenance mode in which the drive pulses are de-clog pulses; wherein, the de-clog pulse has lower power and a longer duration than the printing pulse.