An apparatus for supplying chemical liquid may include at least two ink jet heads, a reservoir for receiving a chemical liquid provided onto a substrate from each of the at least two ink jet heads, a chemical liquid for supplying member providing the chemical liquid to each of the at least two ink jet heads, and a chemical liquid collecting member for drawing and collecting a chemical liquid remained in each of the at least two ink jet heads. One path of the chemical liquid from the chemical liquid supplying member to the chemical liquid collecting member via one of the at least two ink jet heads may be substantially the same as a length of another path the of chemical liquid from the chemical liquid supplying member to the chemical liquid collecting member via the other of the at least two ink jet heads.

An apparatus for supplying chemical liquid may include at least two ink jet heads, a reservoir for receiving a chemical liquid provided onto a substrate from each of the at least two ink jet heads, a chemical liquid for supplying member providing the chemical liquid to each of the at least two ink jet heads, and a chemical liquid collecting member for drawing and collecting a chemical liquid remained in each of the at least two ink jet heads. One path of the chemical liquid from the chemical liquid supplying member to the chemical liquid collecting member via one of the at least two ink jet heads may be substantially the same as a length of another path the of chemical liquid from the chemical liquid supplying member to the chemical liquid collecting member via the other of the at least two ink jet heads.

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.

An apparatus for inkjet printing and curing process for performing on more than one side of a workpiece in one continuous sequential process, the workpiece is shaped as a cube configured with a first surface, a second surface opposite to the first surface, and side surfaces connected between the first surface and the second surface. The apparatus for inkjet printing and curing integration process comprises a base, a supporting module, a printing module, a rotary module, and a transporting module, wherein the transporting module moves the workpiece under the printing module for being printed and cured on one side, then the rotary module rotates the workpiece such that a different side is presented for inkjet printing and curing. The printing module thus performs a continuous inkjet printing and curing process on more than one side of a workpiece, and the working efficiency is improved.

An apparatus for inkjet printing and curing process for performing on more than one side of a workpiece in one continuous sequential process, the workpiece is shaped as a cube configured with a first surface, a second surface opposite to the first surface, and side surfaces connected between the first surface and the second surface. The apparatus for inkjet printing and curing integration process comprises a base, a supporting module, a printing module, a rotary module, and a transporting module, wherein the transporting module moves the workpiece under the printing module for being printed and cured on one side, then the rotary module rotates the workpiece such that a different side is presented for inkjet printing and curing. The printing module thus performs a continuous inkjet printing and curing process on more than one side of a workpiece, and the working efficiency is improved.

Provided are an inkjet printing device, a method for printing bipolar elements, and a method for manufacturing a display device. The inkjet printing device includes an inkjet head disposed above a stage and including a plurality of nozzles through which ink including bipolar elements each having areas doped with partially different polarities is discharged; an actuator disposed in the inkjet head and adjusting an amount of droplet of the ink discharged through the plurality of nozzles; and at least one sensing part disposed in the inkjet head and measuring a number of bipolar elements discharged through the plurality of nozzles.

Provided are an inkjet printing device, a method for printing bipolar elements, and a method for manufacturing a display device. The inkjet printing device includes an inkjet head disposed above a stage and including a plurality of nozzles through which ink including bipolar elements each having areas doped with partially different polarities is discharged; an actuator disposed in the inkjet head and adjusting an amount of droplet of the ink discharged through the plurality of nozzles; and at least one sensing part disposed in the inkjet head and measuring a number of bipolar elements discharged through the plurality of nozzles.

An aqueous ink for ink jet including a resin particle. The resin particle has a first layer and a second layer in this order from the inside toward the outside of the resin particle. The first layer is formed of a first resin in which the proportion of a unit derived from a cycloaliphatic-group-containing ethylenically unsaturated monomer is 10% by mass or less. The tetrahydrofuran-insoluble fraction of the second layer is 15% by mass or more. The second layer is formed of a second resin having the unit derived from the cycloaliphatic-group-containing ethylenically unsaturated monomer and a unit derived from an ionic-group-containing ethylenically unsaturated monomer. The proportion of the unit derived from the ionic-group-containing ethylenically unsaturated monomer in the second resin is 3% by mass or more to 70% by mass or less.

A printing device includes a printing head with nozzles, a movement mechanism that moves the printing head, and at least one processor. The processor controls the printing head to eject ink from each of the nozzles and to print on each position in a printing target area while causing the movement mechanism to move the printing head; and upon superposing printings in the printing target area based on pieces of data that are different from each other, controls the printing head to eject ink from at least one of the nozzles in each printing onto a different position from a position in a previous printing based on a different piece of data among the pieces of data for each of the superposing printings. The pieces of data is used in specifying from which of the nozzles ink is ejected onto each position in a printable area of the printing device.

A print head includes a capillary around an axis of symmetry for a liquid to be printed, the capillary adjoining at least one elastic element and having a nozzle opening which opens into a prechamber. The prechamber has an outlet opening aligned with the nozzle opening of the capillary in its axial orientation of the axis of symmetry and at least one inlet opening for a guide gas. The at least one elastic element forms a guide for the capillary in its axial orientation only. A feed for the liquid to be printed is provided in the capillary. A mechanical oscillation system is provided that includes the at least one elastic element and the capillary with the liquid contained therein. An actuator with a mechanical or magnetic force interaction with the oscillation system is further provided.