A liquid ejection apparatus includes a transmission-side control device and a reception-side control device. The transmission-side control device is configure to: divide image data into a plurality of division data; add check data for error detection to each of the plurality of division data; and transmit, to a reception-side control device, each of the plurality of division data to which respective check data are added. The reception-side control device is configured to: receive each of the plurality of division data to which the respective check data are added; perform error detection on each of the plurality of division data, using check data added to the division data; and transmit, to a drive device configured to control a drive element, division data on which a process of error detection is performed, in parallel with a process of transmitting division data by the transmission-side control device.

A digital printing system includes a print head and a processor. The print head is configured to jet droplets of ink. The a processor is further configured to translate a required shade of a color, to be printed at a given location on a substrate by the print head, into a sequence of pulses, the sequence including: (a) up to a predefined maximum number of driving pulses that cause the print head to jet respective droplets, and (b) a tickling pulse, which has a smaller amplitude than the driving pulses and which causes the print head to jet a droplet smaller than the droplets jetted in response to the driving pulses. The processor is additionally configured to apply the sequence of pulses to the print head.

In a printing method, at least one image of a substrate supported in a printing system is acquired. An actual position of a first alignment feature on the substrate in a frame of reference of the printing system is determined based on the at least one image. Expected positions of second alignment features on the substrate are determined based on the actual position of the first alignment feature. Actual positions of the second alignment features in the frame of reference of the printing system are determined based on the at least one image and the expected positions of the second alignment features. Target positions of print regions on the substrate are determined based on the actual positions of the second alignment features. Ejection of print material onto the substrate in the print regions is controlled based on the target positions of the print regions.

A method for compensating for failed printing nozzles in an inkjet printing machine uses a computer to provide an increased ink drop volume of adjacent nozzles. All existing printing nozzles are measured regarding print failure and deviation of a printed dot beyond a specific threshold, so that the printing nozzles are marked either as functioning, failed, or printing a dot deviating in a direction transverse to the printing direction, and the results are saved on the computer. The computer hides all functioning printing nozzles and marks all remaining isolated printing nozzles as failed nozzles. The computer groups adjacent remaining printing nozzles by marking nozzles printing a dot deviating in a direction transverse to the printing direction as functioning printing nozzles contributing to the compensation or as failed printing nozzles in accordance with a rule, and the computer compensates for all printing nozzles having been marked as failed.

A device for printing to a recording medium with an inkjet printing unit that has at least one nozzle arrangement and is designed to generate a print image on the recording medium. The print image includes at least one test pattern that exhibits at least two different spatial frequencies. The device also has an image acquisition unit that is designed to acquire an image of an acquisition region on the recording medium, which acquisition region includes at least a portion of the test pattern; and a processor that is designed to generate image data corresponding to the image and determine a functional state of the nozzle arrangement, by means of the image data, using a neural network.

Provided are a nozzle inspection unit configured to generate a large amount of defect data to improve detection accuracy of a defective nozzle, and a substrate treatment apparatus including the same. The nozzle inspection unit includes: a data collection module configured to collect a plurality of image data related to nozzles; a data classification module configured to classify the plurality of image data according to predefined classes; a data merging module configured to merge good image data related to a normal nozzle and defect image data related to a defective nozzle from among the plurality of image data; a data training module configured to train a plurality of merged image data obtained through the data merging module; and a defect data generation module configured to generate a plurality of final image data from the plurality of merged image data based on the training result.

There is provided an image processing apparatus for a print executor, including a controller configured to execute direction determining processing. The direction determining processing including: determining whether a specified condition including a first condition is satisfied, the first condition indicating color difference pixels are present in a first partial image and an intermediate image, as well as the color difference pixels are present in a second partial image and the intermediate image; determining direction of head movement in the first partial printing and direction of head movement in the second partial printing to be same as each other in a case that the specified condition is satisfied, and determining the direction of the head movement in the second partial printing to be opposite to the direction of the head movement in the first partial printing in a case that the specified condition is not satisfied.

A liquid ejecting device includes a liquid ejecting unit and a control unit configured to control ejection of liquid. A plurality of types of liquid include a first ink group that is capable of expressing a different color by mixing a plurality of color inks each other and a second ink capable of singly expressing a color of the same system as that of the different color. The control unit is capable of forming a first color mixture pattern and a second color mixture pattern that uses a greater amount of the first ink group than that of the first color mixture pattern to eject the first ink group, is capable of forming a monochrome pattern to eject the second ink, and forms a patch the second color mixture pattern that is adjacent to the first color mixture pattern and the monochrome pattern.

A printer comprising a printhead comprising a number of non-staggered nozzles and a processor communicatively coupled to the printhead, in which the processor executes computer usable program code to adjust the firing time of a number of nozzles within a group of nozzles by a portion of a full dot row. A method comprising, with a processor, adjusting the firing time of a number of nozzles within a group of nozzles of a printhead by a portion of a full dot row by delaying the firing of a subset of those nozzles by a full dot row, in which the nozzles of the printhead are not staggered.

An inkjet printing device includes a stage part including a stage, an inkjet head part including at least one inkjet head that disposes an ink on the stage, the ink including dipoles and a solvent having the dipoles, a heat treatment device that removes the solvent, a first sensing part that measures a position of the ink disposed on the stage, a second sensing part that measures a position of the inkjet head, and a third sensing part that measures a position of each of the dipoles disposed on the stage. A dipole aligning method includes disposing an ink on a substrate, the ink including dipoles and a solvent having the dipoles, generating an electric field on the substrate and disposing the dipoles on the substrate by the electric field, removing the solvent, and measuring a position of each of the dipoles disposed on the substrate.