Abstract: A stamp cleaning device and method using a stretching device are provided. a stamp cleaning device includes: a roll-to-roll unit including a first rolling portion and a second rolling portion, where the second rolling portion is disposed to be spaced apart from the first rolling portion, and configured to move an adhesive film from the first rolling portion to the second rolling portion; and a cleaning unit disposed between the first rolling portion and the second rolling portion, configured to stretch the adhesive film, and clean contaminants of a stamp by adhering the stretched adhesive film to the contaminants adhered to the stamp, where the roll-to-roll unit is configured to wind the adhesive film to which the contaminants are attached to the second rolling portion.

Abstract: A method of fabricating a display device includes preparing a target substrate and light-emitting elements, applying ink on the target substrate, supplying the light-emitting elements to the ink, and aligning the light-emitting elements to aligned positions on the target substrate. Accordingly, the alignment of the light-emitting elements is improved and the utilization efficiency of the light-emitting elements is increased.

Abstract: There are provided a method of manufacturing a display device and a display device. The method includes manufacturing light emitting elements; disposing the light emitting elements on a moving member; bonding the light emitting elements and a stamp member to each other; and transferring the light emitting elements on a pixel circuit layer. The moving member includes a moving base and a moving polymer layer on the moving base. The disposing of the light emitting elements includes attaching the light emitting elements on the moving polymer layer. The bonding of the light emitting elements includes separating the light emitting elements and the moving polymer layer from each other, by a laser.

Abstract: A method of manufacturing a film assembly for transferring a light emitting element is provided. The film assembly includes: a base portion; a stamp layer on the base portion; and a protective film on the stamp layer. The method includes: forming a first cutting area in the film assembly comprising exposing at least a portion of the stamp layer; and forming a second cutting area in the film assembly comprising entirely penetrating the film assembly. The forming of the second cutting area is performed after the forming of the first cutting area.

Abstract: An inkjet printing apparatus includes a surface acoustic wave module including an inner passage and a surface acoustic wave generator around the inner passage; and an outflow passage connected to the surface acoustic wave module to discharge ink, where the outflow passage includes a first outflow passage connected to the inner passage to discharge first ink particles and a second outflow passage connected to the inner passage to discharge second ink particles having an average diameter smaller than that of the first ink particles, and the surface acoustic wave generator is closer to the second outflow passage than the first outflow passage.

Abstract: A method of transferring a plurality of light emitting elements using a stretching device includes stretching a transfer film disposed on a support portion of the stretching device by a stretching portion, and arranging the plurality of light emitting elements at a first gap on the transfer film. The method further includes reducing an elongation of the transfer film so that the stretching portion disposes the plurality of light emitting elements at a second gap narrower than the first gap, and transferring the plurality of light emitting elements disposed at the second gap on the transfer film to a substrate.

Abstract: An inkjet printing apparatus may form a material layer on a substrate. The inkjet printing apparatus includes a stage, an ink-receiving member, and an inkjet head. The stage may support the substrate. The inkjet head overlaps at least one of the stage and the ink-receiving member, may provide a first set of ink to the substrate, and may provide a second set of ink to the ink-receiving member when the substrate is supported by the stage.

Abstract: An inkjet printing apparatus according to an embodiment includes a stage where a target substrate is disposed, and an inkjet head that discharges ink on the target substrate. The inkjet head includes a tank that stores the ink, nozzles that are provided on the tank and discharge the ink, and a damper that is disposed in the tank, and the damper comprises a protruding portion that protrudes toward the nozzles from the damper.

Abstract: A transfer substrate according to an embodiment includes a base substrate, a magnetic plate disposed on a surface of the base substrate, a mold disposed on another surface of the base substrate and including a plurality of grooves, and a magnetic body disposed in the plurality of grooves of the mold.

Abstract: A transfer device of a light-emitting element, the transfer device including: a transferer including a transferring portion, a folding portion at an edge, a stamp layer having a tacky or adhesive surface, and a base layer above one surface of the stamp layer; a protective film above an other surface of the stamp layer, and defining an incision groove with the transferring portion at a center thereof on a plane; an inverter for inverting up, down, left, and right sides of the transferer, and including a support chuck configured to adsorb the protective film overlapping the transferring portion, and a side chuck configured to adsorb the protective film overlapping the folding portion; a transfer head having a head chuck configured to be adsorbed to the base layer, and movable up, down, left, and right; and a folder including a detachable first clamp.

Abstract: An inkjet device includes a stage, a first suction member, a second suction member, a spray member, and a substrate. The first suction member is at a first side surface of the stage. The second suction member is at a second side surface of the stage. The spray member is configured to store ink and to move above top surfaces of the stage, the first suction member, and the second suction member, the spray member including a body and a nozzle at a side of the body to discharge the ink. The substrate is on the stage in which the ink discharged from the spray member is printed on the substrate.

Abstract: A transfer film stretching device includes: a transfer film support unit having a top surface configured to receive a transfer film, the transfer film having light emitting elements arranged at a first distance mounted thereon; a first stretching unit outside the transfer film support unit and configured to move in one direction or another direction of a third direction while fixing an outer edge of the transfer film to stretch a width of the transfer film in an outer circumferential direction; and a second stretching unit between the first stretching unit and the transfer film support unit and movable in the one direction or the other direction of the third direction independently of the first stretching unit.

Abstract: A light-emitting element transfer system includes raw film cutting device for forming a transfer member by cutting a raw film, a stretching device for stretching a transfer film with a plurality of light-emitting elements disposed thereon, a circuit board support member for supporting a circuit board and transport head for adsorbing the transfer member and transferring the light-emitting elements on the transfer film onto the circuit board by using the adsorbed transfer member.

Abstract: A light-emitting element transfer system includes raw film cutting device for forming a transfer member by cutting a raw film, a stretching device for stretching a transfer film with a plurality of light-emitting elements disposed thereon, a circuit board support member for supporting a circuit board and transport head for adsorbing the transfer member and transferring the light-emitting elements on the transfer film onto the circuit board by using the adsorbed transfer member.

Abstract: An apparatus for transferring light emitting elements includes: a transfer member including a stamp layer having an adhesive property and a base layer on a first surface of the stamp layer, the transfer member having a transfer portion, a folding portion, and an incision groove at a boundary between the transfer portion and the folding portion; a protective film on a second surface of the stamp layer, the protective film having an incision groove defining a transfer area and a folding area; an inversion member supporting the transfer member; and a transfer head including a chuck configured to adsorb to the base layer and to move the transfer member vertically and horizontally. The transfer portion is at a center with respect to the incision groove, and the folding portion is at an outer side of the incision groove with respect to the transfer portion.

Abstract: The disclosure provides an apparatus for fabricating a display panel. The display device includes a transfer member having adhesiveness or stickiness and thereby capable of being bonded to light-emitting elements and a transport member transferring and bonding the light-emitting elements which are aligned on a donor substrate onto a circuit substrate by the transfer member, the transport member includes a laser transmitter formed of a material capable of transmitting laser light, a transport head capable of moving vertically and horizontally and surrounding side surfaces of the laser transmitter, and a head chuck disposed on a surface of the transport head to surround the side surfaces of the laser transmitter, having an adsorption function, and capable of being attached to, or detached from, the transfer member.

Abstract: The present disclosure may provide a method of fabricating a display panel, the method includes picking up, by a transfer head, a transfer member located on a support member, detaching a light-emitting element from a donor substrate by attaching the transfer member picked up by the transfer head to the light-emitting element on the donor substrate to lift the light-emitting element, aligning, by the transfer head, the light-emitting element attached to the transfer member on a circuit board, and detaching the transfer member from the transfer head, bonding the light-emitting element attached to the transfer member onto the circuit board and separating, by the transfer head, the transfer member from the light-emitting element bonded to the circuit board to remove the transfer member.

Abstract: An apparatus for manufacturing a display device includes a stage on which a substrate of the display device is disposed, a mold including a surface including recessed portions, an injector that applies an ink including light emitting elements on the surface of the mold, a doctor blade that removes the ink from the surface of the mold and remains the ink disposed in the recessed portions of the mold, and a compressor that compresses the surface of the mold to the substrate.

Abstract: An inkjet printing apparatus includes a surface acoustic wave module including an inner passage and a surface acoustic wave generator around the inner passage; and an outflow passage connected to the surface acoustic wave module to discharge ink, where the outflow passage includes a first outflow passage connected to the inner passage to discharge first ink particles and a second outflow passage connected to the inner passage to discharge second ink particles having an average diameter smaller than that of the first ink particles, and the surface acoustic wave generator is closer to the second outflow passage than the first outflow passage.

Abstract: An inkjet printing apparatus includes a print head including an inkjet head having a nozzle surface; nozzles disposed on the nozzle surface, that spray an ink from the nozzles; and a heater that heats a temperature of the inkjet head to a reference temperature. The nozzles include a first nozzle having a first diameter; and a second nozzle having a second diameter different from the first diameter of the first nozzle, the nozzle surface includes a first area in which the first nozzle is disposed and a second area in which the second nozzle is disposed, the first area has a first temperature in case that the heater heats the inkjet head to the reference temperature, and the second area has a second temperature different from the first temperature in case that the heater heats the inkjet head to the reference temperature.