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.

A display apparatus includes a substrate, a first electrode on the substrate, the first electrode including a first portion that has a flat upper surface and a second portion that protrudes from the first portion and has an inclined surface, a second electrode facing the first electrode in parallel on the substrate, the second electrode including a first portion that has a flat upper surface and a second portion that protrudes from the first portion and has an inclined surface, and a plurality of light-emitting devices separate from each other on the first electrode and the second electrode, the light-emitting devices each having a first end contacting the upper surface of the first portion of the first electrode and a second end contacting the upper surface of the first portion of the second electrode.

A light emitting device including first and second electrodes spaced apart from each other on a substrate, at least one bar-type LED having a first end on the first electrode and a second end on the second electrode, and an insulative support body between the substrate and the bar-type LED. The at least one bar-type LED has a length greater than a width.

A droplet ejecting apparatus includes a workpiece table configured to place a workpiece thereon, a droplet ejecting head configured to eject droplets onto the workpiece placed on the workpiece table, a Y-axis linear motor configured to move the workpiece table in a main scanning direction (Y-axis direction), a position detector configured to detect a position of a carriage mark, and a control unit configured to calculate the positional deviation amount in the main scanning direction between a detection position detected by the position detector and a reference position of the carriage mark and correct a droplet ejecting timing of the droplet ejecting head based on the positional deviation amount.

Disclosed is a workpiece processing apparatus that performs a predetermined processing on a workpiece. The workpiece processing apparatus includes: a workpiece table configured to place the workpiece thereon; a processor configured to process the workpiece placed on the workpiece table; a movement mechanism configured to relatively move the workpiece table and the processor; a position measuring device configured to measure a position of the movement mechanism; a detector configured to detect a position of the workpiece placed on the workpiece table; and a corrector configured to calculate a positional correction amount of the workpiece table based on a measurement result of the position measuring device and a detection result of the detector.

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.

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 color filter includes: a substrate that transmits light; and a colored layer being formed by an ink jet ink, the colored layer being arranged on a lattice point which is a virtual point in a plurality of virtual lattice patterns arranged on the substrate with a first pitch in a first direction and a second pitch in a second direction, the colored layer being separated in the first direction and the second direction.

A light emitting device includes: a base substrate; a plurality of unit regions provided on the base substrate; a barrier disposed at a boundary of the unit regions to surround each of the unit regions; a dam disposed in each of the unit regions to be spaced apart from the barrier; a first electrode provided in each of unit light emitting regions surrounded by the dam; a second electrode disposed in each of the unit light emitting regions, the second electrode of which at least one region is provided opposite to the first electrode; and one or more LEDs provided in each of the unit light emitting regions, the one or more LEDs being electrically connected between the first electrode and the second electrode.

An inkjet printing apparatus includes: a stage, which reciprocates in forward and reverse directions opposite to each other and has a target substrate disposed thereon; an inspection device including a film disposed outside the stage and a measurement unit which measures an inspection pattern provided on the film; and a head assembly, which moves along one direction crossing the forward direction and has a plurality of heads which supplies a liquid composition to the target substrate. The head assembly moves in the one direction to overlap the film and sprays the composition onto the film to form an inspection pattern.