An image formation device includes a plurality of nozzles arranged in a sub scan direction and configured to eject ink, a processor, and a memory configured to store computer-readable instructions that, when executed by the processor, perform processes including, performing a determination control configured to determine whether an unstable ejection condition, under which the ejection of the ink from the nozzles becomes unstable, is satisfied, and performing a first print control configured to cause printing to be performed by a multi-pass method when it is determined that the unstable ejection condition is satisfied.

A liquid droplet measurement method and a liquid droplet measurement device with which the luminance contrast can be improved without making changes in, for example, the numerical aperture of a lens when the quantity of reflected light from the surface of the measurement target liquid droplet alone cannot provide a sufficient luminance contrast. A method and an apparatus for manufacturing a device are also provided. The liquid droplet measurement device includes: a measurement table having a surface with a recess and for holding a translucent sample substrate; an imaging section that applies light onto the sample substrate having formed thereon a liquid droplet, and measures quantities of reflected light from the sample substrate and the liquid droplet; and a measurement control unit that determines a volume or a surface shape of the liquid droplet using luminance information of the reflected light quantities measured by the imaging section.

An inkjet printing system with a droplet measurement apparatus is described herein. The droplet measurement apparatus has a light source with a collimating optical system, an imaging device disposed along an optical path of the collimating optical system, and a droplet illumination zone in the optical path of the collimating optical system, the droplet illumination zone having a varying droplet illumination location, wherein the light source, the imaging device, or both are adjustable to place a focal plane of the imaging device at the droplet illumination location. The droplet measurement apparatus is structured to accommodate at least a portion of a dispenser of the printing system within the droplet illumination zone.

Apparatus, methods, and systems for dynamically modulating radiation energy in a printing system are disclosed. A system receives data comprising an image pattern for depositing ink on a substrate. The system determines one or more ink properties for the ink configured to be deposited onto the substrate. The ink properties and/or a color of the substrate are used to determine a corresponding energy level value for a radiation lamp. The ink is deposited in the image pattern on the substrate. One or more radiation lamps heat the substrate and the ink, wherein the radiation lamps are configured with the corresponding energy level values.

Disclosed is an ejection volume compensation method of an inkjet printer for manufacturing an organic electroluminescent device pixel. The inkjet printer includes a plurality of nozzles and is configured to perform a plurality of print processes for the same pixel location. A target ejection volume for the next print process is selected so that an average of the target ejection volume and an actual ejection volume for the previous print process is equal to an ideal ejection volume. Also disclosed are an ejection volume compensation device for use with the inkjet printer, an inkjet printing device, and a non-transitory machine readable medium.

Herein is described a method involving a drop detector. The method may comprise: ejecting ink drops from the nozzles on a printhead toward a drop detector. A drop characteristic may then be determined from the drop detector for each ink-jet nozzle. Drop characteristics for the nozzles across the printhead may be collated into a data set, and compared with a predetermined data set for a printhead having predetermined print behaviour to determine if and how the data sets differ in terms of the pattern of drop characteristics across the printheads. If the data sets differ, a recovery strategy may be selected based how the data sets differ in terms of the pattern of drop characteristics across the printheads. A system and computer readable medium are also described herein.

Disclosed is a coating device which draws a pattern of a functional liquid on a substrate. The coating device includes: a substrate holding unit which holds the substrate; a droplet discharging unit which discharges a droplet of the functional liquid on the substrate held by the substrate holding unit; a moving unit which relatively moves the substrate holding unit and the droplet discharging unit in a main scanning direction and a sub scanning direction on a base; a mass measuring unit including a cup which receives the droplet discharged by the droplet discharging unit and a mass measuring device which measures a mass of the functional liquid accumulated in the cup; and a liquid drain unit which drains the functional liquid accumulated in the cup.

A liquid ejection apparatus to eject liquid droplets includes an inkjet head that is an ejection head including a plurality of nozzles and a plurality of driving elements, a driving signal outputter, an ejection nozzle setter, and a timing setter to set timing at which the driving elements receive a driving signal. The driving signal outputter outputs, in common, a voltage change signal being a signal whose voltage changes with passage of time, as at least a part of the driving signal, to the plurality of nozzles. The timing setter individually sets, for each of the driving elements, a time period during which the driving elements receive the voltage change signal. The nozzles respectively eject liquid droplets by inkjet technology according to the driving signal in which the time period to receive the voltage change signal is individually set.

A printing apparatus includes an ink application unit, a reactant application unit, a control unit configured to control an application amount of the reactant to be applied by the reactant application unit, and an identification unit configured to identify a pixel included in a line portion based on image data indicating an image to be formed on the print medium. The control unit controls the application amount of the reactant so that an amount per unit area of the reactant to be applied to a region in which the line portion to be formed on the print medium with the pixel identified by the identification unit is to be printed is less than the amount per unit area of the reactant to be applied to a region in which an image including a pixel not identified by the identification unit is formed.

In a printing method using an ink jet head unit including a plurality of ink jet heads disposed in a horizontal direction over an object in which each of adjacent end portions of the plurality of ink jet heads has more than one overlapped nozzle, a supply of droplets from each of the nozzles of the plurality of ink jet heads may be identified. A combination of supplies of the droplets from the nozzles of the plurality of ink jet heads may be determined to form a desired pattern on the object. The desired pattern may be formed on the object using the plurality of ink jet heads including the nozzles arranged in accordance with the determined combination of the supplies of the droplets.