A control unit controls a print head to print a print image by ejecting ink through a nozzle to form dots on a print medium and a movement unit to impart relative movement between the print head and the print medium to print a print image on the print medium. The control unit obtains a dot adjustment value in the predetermined print operation based on the measurement result of a measurement unit measuring a first pattern composed of a print image printed by the predetermined print operation including the relative movement, and a second adjustment value for adjusting dot printing positions in the predetermined print operation in a unit of length shorter than in the adjustment using the first adjustment value based on a second pattern printed by the predetermined print operation in a density according to density information on the first pattern, measured by the measurement unit.

A liquid ejecting device includes: a head having a plurality of nozzles for ejecting droplets onto a printing medium; a movement unit configured to move the head relative to the printing medium in a relative movement direction; and a control unit configured to record a test pattern on the printing medium by controlling the head and the movement unit, and to perform recording by correcting control of the head and/or the movement unit based on a correction value obtained from the test pattern, wherein the test pattern includes a plurality of patches from which a plurality of candidates for the correction value for correcting a landing position at which the droplet lands on the printing medium in the relative movement direction are obtained.

A printing device may include two printers for printing to the front side and the back side of a recording medium. The physical page length of at least one print image applied onto the front side of the recording medium is determined. The required page length of at least one print image to be applied onto the back side of the recording medium is adapted to the determined page length. At least one print line of the print image for the back side is printed repeatedly if the required page length for application of the rear print page onto the back side of the recording medium is smaller than the determined page length.

A recording control device. A first portion control section forms a first portion as a portion that is continuous from a first region and is not continuous to a second region in a recording region in an output image that is formed on a medium in an overlapping region in a recording region, in such a manner that a use rate of a first nozzle row of an overlapping portion of a nozzle row is set to a first nozzle use rate. A second portion control section forms a second portion as a portion that is continuous with the first region and the second region in the output image in the overlapping region, in such a manner that the use rate of the first nozzle row of the overlapping portion is set to the second nozzle use rate.

Improved manufacturing using a printer that deposits a liquid to fabricate a layer having specified thickness includes automated adjustment or print parameters based on ink or substrate characteristics which have been specifically measured or estimated. In one embodiment, ink spreading characteristics are used to select droplet size used to produce a particular layer, and/or to select a specific baseline volume/area or droplet density that is then scaled and/or adjusted to provide for layer homogeneity. In a second embodiment, expected per-droplet particulars are used to interleave droplets in order to carefully control melding of deposited droplets, and so assist with layer homogeneity. The liquid layer is then cured or baked to provide for a permanent structure.

A method of printing an image from a printhead module having a plurality of horizontal ink planes M supplied with a same ink. Each ink plane has a nozzle row and the nozzles rows of all ink planes have vertically aligned nozzles. The method includes the steps of: defining contiguous span groups along each nozzle row, each span group containing N nozzles; allocating dot data for each image line of the image to a predetermined number of nozzles P in each span group of each nozzle row; sending the dot data to the printhead module and firing nozzles sequentially from the ink planes to print the image line. Only one nozzle from each span group in a same nozzle row is fired simultaneously, N is an integer multiple of M, and P is N divided by M.

A print chip includes: an elongate silicon substrate defining nominal leading and trailing longitudinal sides of the print chip; circuitry layers positioned on the silicon substrate; and a MEMS layer positioned on the circuitry layers. The MEMS layer includes a plurality of parallel nozzle rows, each nozzle row having a plurality of inkjet nozzle devices arranged in a main row portion and a dropped row portion offset from the main row portion. The circuitry layers include data latches configured to provide dot data for the inkjet nozzle devices. A first row of data latches is positioned adjacent a leading row of the main row portion, and a second row of data latches is positioned adjacent a trailing row of the dropped row portion.

A method of printing an image from a printhead module having a plurality of horizontal nozzle rows. Each nozzle row has a main row portion and a corresponding dropped row portion vertically offset from the main row portion. The method includes the steps of: determining a predetermined delay for the dropped row portions based on the offset, a print speed and a print resolution; allocating dot data for image lines to respective nozzle rows based on the print speed and print resolution, sending first dot data for each main row portion and second dot data for each dropped row portion to the printhead module; and firing nozzles from the main row portions and dropped row portion in a predetermined sequence. Each dropped row portion is fired independently of its corresponding main row portion and delayed relative to its corresponding main row portion by the predetermined delay.

A method of printing an image from a printhead module having a plurality of horizontal nozzle rows. The method includes the steps of: allocating first dot data for an image line of the image to nozzles in a main row portion of a first nozzle row; allocating second dot data for the image line to nozzles in a dropped row portion of the first nozzle row; sending the first and second dot data to the printhead module and firing respective droplets. Some bits of the first dot data correspond to pixels of the image line aligned with the dropped row portion, and some bits of the second dot data correspond to pixels of the image line aligned with the main row portion.

A method of printing an image from a printhead module having a plurality of horizontal nozzle rows, the method including the steps of: allocating first dot data for an image line of the image to nozzles of a main row portion of a first nozzle row; allocating second dot data for the image line to nozzles of a dropped row portion of a second nozzle row; and sending the first and second dot data to the printhead module and firing respective droplets. Each nozzle row of the printhead module has a same number of nozzles N; and the first nozzle row and the second nozzle row are non-corresponding nozzle rows, such that a number of nozzles contained in the main portion of the first nozzle row and a number of nozzles contained in the dropped row portion of the second nozzle row is greater or fewer than N nozzles.