An inkjet printing device includes an ink reservoir that stores ink containing particles, an inkjet head part that receives the ink from the ink reservoir and ejects the ink onto a target substrate and a driver for rotating the ink reservoir.

An inkjet printing device includes an ink reservoir that stores ink containing particles, an inkjet head part that receives the ink from the ink reservoir and ejects the ink onto a target substrate and a driver for rotating the ink reservoir.

A liquid ejection device includes: an ejecting unit configured to eject a liquid from a nozzle in a first direction; and a light source unit configured to emit light in a first optical path and a second optical path which are arranged such that the first optical path and the second optical path intersect on an extension line in the first direction from the nozzle. With the liquid ejection device having such a configuration, it becomes easy to eject the liquid at a position having a preferable interval with respect to an object.

An inkjet recording apparatus includes a conveyance belt, a recording head, a control portion, an interval detection sensor, a thickness detection reference member, and a storage portion. The control portion is capable of executing an interval detection mode, a thickness calculation mode, and a landing timing correction mode. In the landing timing correction mode, the control portion sets the landing timing to be equal to a reference landing timing when the thickness of the conveyance belt stored in the storage portion is equal to a predetermined reference thickness, sets the landing timing to be earlier than the reference landing timing when the thickness of the conveyance belt stored in the storage portion is larger than the reference thickness, and sets the landing timing to be later than the reference landing timing when the thickness of the conveyance belt stored in the storage portion is smaller than the reference thickness.

An inkjet recording apparatus includes a conveyance belt, a recording head, a control portion, an interval detection sensor, a thickness detection reference member, and a storage portion. The control portion is capable of executing an interval detection mode, a thickness calculation mode, and a landing timing correction mode. In the landing timing correction mode, the control portion sets the landing timing to be equal to a reference landing timing when the thickness of the conveyance belt stored in the storage portion is equal to a predetermined reference thickness, sets the landing timing to be earlier than the reference landing timing when the thickness of the conveyance belt stored in the storage portion is larger than the reference thickness, and sets the landing timing to be later than the reference landing timing when the thickness of the conveyance belt stored in the storage portion is smaller than the reference thickness.

A liquid droplet ejecting apparatus, includes: an ejecting head which ejects liquid droplets; a light source which causes light to be radiated toward a flight space of the liquid droplets with a first output power or a second output power; a detecting element which detects received amount of the light radiated from the light source and passed through the liquid droplets flying in the flight space; and a controller. The controller causes the light to be radiated from the light source with the first or second output power at a timing of the ejecting head being driven to eject the liquid droplets; in a first detecting mode, executes a detection about an ejection failure of the nozzles based on the received amount of the light; and in a second detecting mode, executes a detection about a phenomenon causing the ejection failure based on the received amount of the light.

A liquid droplet ejecting apparatus, includes: an ejecting head which ejects liquid droplets; a light source which causes light to be radiated toward a flight space of the liquid droplets with a first output power or a second output power; a detecting element which detects received amount of the light radiated from the light source and passed through the liquid droplets flying in the flight space; and a controller. The controller causes the light to be radiated from the light source with the first or second output power at a timing of the ejecting head being driven to eject the liquid droplets; in a first detecting mode, executes a detection about an ejection failure of the nozzles based on the received amount of the light; and in a second detecting mode, executes a detection about a phenomenon causing the ejection failure based on the received amount of the light.

A system is disclosed. The system includes at least one physical memory device to store drop size logic and one or more processors coupled with the at least one physical memory device to execute the drop size logic to receive first ink drop size data for each of a plurality of color planes associated with a first halftone design, generate first ink drop count data for each of the plurality of color planes based on the first halftone design and print job data, generate second ink drop count data for each of the plurality of color planes based on a second halftone design and the print job data and generate second ink drop size data for each of the plurality of color planes associated with the second halftone design based on the first ink drop count data, the first ink drop size data and the second ink drop count data.

A system is disclosed. The system includes at least one physical memory device to store drop size logic and one or more processors coupled with the at least one physical memory device to execute the drop size logic to receive first ink drop size data for each of a plurality of color planes associated with a first halftone design, generate first ink drop count data for each of the plurality of color planes based on the first halftone design and print job data, generate second ink drop count data for each of the plurality of color planes based on a second halftone design and the print job data and generate second ink drop size data for each of the plurality of color planes associated with the second halftone design based on the first ink drop count data, the first ink drop size data and the second ink drop count data.

An ejection apparatus includes an ejection head having an ejection port, a droplet detection unit, an acquisition unit, a control unit, and a decision unit. The droplet detection unit detects that a droplet ejected from the ejection port has reached a predetermined position. The acquisition unit acquires information regarding a velocity of movement of the detected droplet. The control unit controls the ejection head to eject the droplet from the ejection port. The decision unit decides a number of consecutive ejections of a plurality of droplets from the ejection head based on the acquired information regarding the velocities of each of the plurality of droplets ejected consecutively and detected by the droplet detection unit. If the acquisition unit acquires the information regarding velocities of detected droplets, the control unit controls the ejection head to consecutively eject the droplets from the ejection head based on the decided number of consecutive ejections.