The present disclosure relates to a printing apparatus, and the printing apparatus according to the present disclosure includes an optical unit for expanding and displaying a hitting point of ink, from above a substrate; and a nozzle unit for ejecting the ink, wherein the nozzle unit includes a nozzle body that is obliquely disposed with respect to the substrate; and a nozzle that is coupled to the nozzle body, and has a flow path from which the ink is ejected, and has a tip that is bended towards the substrate.

Examples associated with drop velocity aberrancy detection are disclosed. One example includes firing ink through nozzles of a print-head past sensors to identify drop velocities of the nozzles. A target drop velocity is selected based on the drop velocities of the nozzles. An aberrant nozzles is detected when a nozzle has a drop velocity that deviates from the target drop velocity by a selected threshold. The aberrant nozzle is deactivated, and a good nozzle that will travel over locations traversed by the aberrant nozzle is configured to print portions of a job that would have been printed by the aberrant nozzle.

Examples associated with drop velocity aberrancy detection are disclosed. One example includes firing ink through nozzles of a print-head past sensors to identify drop velocities of the nozzles. A target drop velocity is selected based on the drop velocities of the nozzles. An aberrant nozzles is detected when a nozzle has a drop velocity that deviates from the target drop velocity by a selected threshold. The aberrant nozzle is deactivated, and a good nozzle that will travel over locations traversed by the aberrant nozzle is configured to print portions of a job that would have been printed by the aberrant nozzle.

A liquid discharge apparatus includes a stage on which a recording medium is placed, a head configured to discharge a liquid onto the recording medium on the stage, an inclined wall adjacent to the recording medium, the inclined wall configured to cover a part of the stage, and a height adjuster configured to adjust a height of one end of the inclined wall to be equal to or lower than a thickness of the recording medium.

A liquid discharge apparatus includes a stage on which a recording medium is placed, a head configured to discharge a liquid onto the recording medium on the stage, an inclined wall adjacent to the recording medium, the inclined wall configured to cover a part of the stage, and a height adjuster configured to adjust a height of one end of the inclined wall to be equal to or lower than a thickness of the recording medium.

A printing system is provided comprising a print head including a plurality of ink nozzles; an actuator configured to move the print head relative to a substrate; a print head position sensing system configured to detect an actual position of the print head relative to the substrate; and a controller. The controller is configured to: receive the actual position of the print head detected by the print head position sensing system corresponding to a target print head position; determine a positional offset between the actual position and the target print head position; generate a nozzle firing pattern based on the positional offset; and control the print head to print the nozzle firing pattern at the target print head position using the plurality of ink nozzles.

There is provided a liquid discharging apparatus including: a liquid discharging head; an electrode; a voltage supplier configured to generate an electric potential difference between the liquid discharging head and the electrode; a first output part; and a voltage comparer connected to the voltage supplier. The voltage comparer includes a comparing signal output part configured to output a comparing signal. The voltage supplier is configured to: execute boosting to increase the magnitude of the voltage to be outputted from the voltage supplier in a case that the comparing signal indicates that a magnitude of the voltage outputted from the voltage supplier is not more than a magnitude of a predetermined voltage; and stop the boosting in a case that the comparing signal indicates that the magnitude of the voltage outputted from the voltage supplier is larger than the magnitude of the predetermined voltage.

There is provided a liquid discharging apparatus including: a liquid discharging head; an electrode; a voltage supplier configured to generate an electric potential difference between the liquid discharging head and the electrode; a first output part; and a voltage comparer connected to the voltage supplier. The voltage comparer includes a comparing signal output part configured to output a comparing signal. The voltage supplier is configured to: execute boosting to increase the magnitude of the voltage to be outputted from the voltage supplier in a case that the comparing signal indicates that a magnitude of the voltage outputted from the voltage supplier is not more than a magnitude of a predetermined voltage; and stop the boosting in a case that the comparing signal indicates that the magnitude of the voltage outputted from the voltage supplier is larger than the magnitude of the predetermined voltage.

Provided is a liquid ejection device capable of improving the sealing property of a gap between a main housing and a liquid ejection head while maintaining a position adjustment allowance of the liquid ejection head with respect to the main housing. A main housing has one or more ejection unit protrusion opening into which the liquid ejection unit is inserted downward and protrudes through a gap in a horizontal direction, and covers and internally houses a portion of the liquid ejection head other than the liquid ejection unit. The size of the ejection unit insertion opening is smaller than the size of the ejection unit protrusion opening. The sealing member comes in contact with the outer peripheral portion of the liquid ejection unit in a state where the edge portion of the ejection unit insertion opening is bent.

Provided is a liquid ejection device capable of improving the sealing property of a gap between a main housing and a liquid ejection head while maintaining a position adjustment allowance of the liquid ejection head with respect to the main housing. A main housing has one or more ejection unit protrusion opening into which the liquid ejection unit is inserted downward and protrudes through a gap in a horizontal direction, and covers and internally houses a portion of the liquid ejection head other than the liquid ejection unit. The size of the ejection unit insertion opening is smaller than the size of the ejection unit protrusion opening. The sealing member comes in contact with the outer peripheral portion of the liquid ejection unit in a state where the edge portion of the ejection unit insertion opening is bent.