An apparatus for manufacturing a display device, the apparatus comprising: a droplet discharger comprising a nozzle configured to discharge a droplet; a first detector on a falling path of the droplet that falls from the droplet discharger and configured to detect a shape of the droplet; a second detector spaced apart from the first detector and configured to detect the shape of the droplet that falls from the droplet discharger; and a controller configured to calculate at least one of a volume of the droplet, a falling speed of the droplet, the falling path of the droplet, or a discharge angle, at which the droplet is discharged from the nozzle, based on results detected by the first detector and the second detector.

A printing apparatus for printing using a printhead including a plurality of nozzles each configured to discharge ink and a plurality of sensors, corresponding to the plurality of nozzles, for detecting a discharge state of ink from the plurality of nozzles, judges a discharge state. More specifically, the apparatus prints, based on print data, an image by driving the printhead under a first drive condition to discharge the ink from the printhead to a first area, discharges ink to a second area different from the first area by driving the printhead, based on inspection data, under a second drive condition different from the first drive condition, and judges a discharge state of each nozzle by monitoring an output from each sensor at a timing of driving the printhead under the second drive condition.

A liquid discharge method of discharging a liquid from a nozzle of a liquid discharge head by applying a drive pulse to a drive element of the liquid discharge head includes an acquisition step of acquiring a recording condition, and a driving step of applying the drive pulse to the drive element. The drive pulse includes a first potential, a second potential different from the first potential, and a third potential different from the first potential and the second potential. The second potential is to be applied after the first potential, and the third potential is to be applied after the second potential. In the liquid discharge method, in the driving step, the drive pulse in which a time of the third potential varies depending on the recording condition acquired in the acquisition step is applied to the drive element.

In a state where a distance from an ejection port surface of an ejection head to a predetermined position corresponds to a first distance, a period detection unit detects a first period from when ejection of a droplet from an ejection port is started until when a droplet detection unit detects the droplet, and in a state where the distance from the ejection port surface of the ejection head to the predetermined position is changed to a second distance by a change unit, the period detection unit detects a second period from when ejection of a droplet from the ejection port is started until when the droplet detection unit detects the droplet, the second distance being different from the first distance. A calculation unit calculates an ejection speed of the droplet, based on the first distance, the second distance, the first period, and the second period.

A liquid discharge apparatus includes a head to discharge a liquid containing a solvent from a discharge port toward an object, a concentration detector to detect a vapor concentration of the solvent, and circuitry to causes the head to discharge the liquid from the discharge port while moving the discharge port of the head in a movement direction perpendicular to a discharge direction to discharge the liquid. When the vaper concentration is equal to or higher than a first threshold, the circuitry stops moving the head in the movement direction and causes the head to stop discharging the liquid from the discharge port. When the vaper concentration is less than a second threshold, the circuitry resumes moving the head in the movement direction from a stop position where the head stops moving in the movement direction and causes the head to resume discharging the liquid from the discharge port.

Provided are an apparatus for manufacturing a display device and a method of manufacturing the display device. The apparatus for manufacturing a display device includes a droplet discharge unit including a nozzle that discharges a droplet, at least one sensor that senses a partial shape of an outer surface of the droplet projected onto a plane and a cross-sectional shape of the droplet discharge unit projected onto the plane, the plane being on a falling path of the droplet discharged from the droplet discharge unit, and a controller that calculates, based on a result sensed by the at least one sensor, at least one of a volume of the droplet, a falling speed of the droplet, a discharge angle at which the droplet is discharged from the nozzle, and a falling path of the droplet moving from the nozzle to a substrate.

There is provided a liquid discharge apparatus, including: a conveyer; a head having a nozzle surface formed having a nozzle from which a liquid is discharged on a recording medium conveyed by the conveyer; a carriage carrying the head and configured to be movable in a scanning direction parallel to the nozzle surface in a movement range including a facing range that faces a passing area where the recording medium conveyed by the conveyer passes; a first conductor for detection arranged at a first side in the scanning direction relative to the passing area; and a second conductor for detection arranged at a second side, which is opposite to the first side, in the scanning direction relative to the passing area.

A printing apparatus for printing using a printhead including a plurality of nozzles, each configured to discharge ink, and a plurality of sensors, corresponding to the plurality of nozzles, for detecting a discharge state of ink from the plurality of nozzles, judges a discharge state. The apparatus prints, based on print data, an image by driving the printhead under a first drive condition to discharge the ink from the printhead to a first area, discharges ink to a second area different from the first area by driving the printhead, based on inspection data, under a second drive condition different from the first drive condition, and judges a discharge state of each nozzle by monitoring an output from each sensor at a timing of driving the printhead under the second drive condition.

The droplet velocities of the nozzles of different groups of nozzles of a print head of an inkjet printing device are determined for different line clock rates. An optimized operating line clock rate is then determined for the operation of the printing device, where the deviation between the droplet velocities of the nozzles of the different groups is reduced (e.g. minimized). The droplet positioning along the transport direction of a recording medium may be advantageously homogenized via the convergence of the droplet velocities.

A method of depositing single particles onto a target includes loading a particle suspension to a droplet dispenser having a suspension reservoir and a nozzle section, detecting particles in the nozzle section, testing a single particle condition of the droplet dispenser, and determining whether an ejection region of the nozzle section includes one single particle. The method further includes operating the droplet dispenser for dispensing a droplet such that the droplet is dispensed onto the target if the single particle condition is fulfilled, or the droplet is dispensed into a collection reservoir if the single particle condition is not fulfilled. The step of testing the single particle condition further includes determining whether a sedimentation region adjacent to the ejection region is free of particles. A dispenser for performing the method is also provided.