公开(公告)号：US12005706B2

公开(公告)日：2024-06-11

申请号：US17786931

申请日：2020-06-05

Applicant: Samsung Display Co., LTD.

Inventor： An Na Ryu ,  Jin Oh Kwag ,  Heung Cheol Jeong

IPC: B41J2/18 ,  B41J2/045 ,  B41J2/125 ,  B41M5/00

CPC classification number: B41J2/04561 ,  B41J2/125 ,  B41J2/18 ,  B41M5/0023

Abstract: An inkjet printing device includes a stage; an inkjet head disposed above the stage and comprising nozzles through which ink is discharged, the ink including bipolar elements extending in a direction; an ink circulation part which supplies the ink to the inkjet head, and to which the ink remaining after being discharged from the inkjet head is supplied; and at least one sensing part disposed between the inkjet head and the ink circulation part and sensing a number of the bipolar elements that are discharged through the nozzles.

公开(公告)号：US12004412B2

公开(公告)日：2024-06-04

申请号：US17278126

申请日：2019-04-08

Applicant: Samsung Display Co., LTD.

Inventor： Heung Cheol Jeong ,  Byung Chul Lee ,  Myung Soo Huh ,  Jin Oh Kwag ,  Do Hun Lee

IPC: H10K71/13

CPC classification number: H10K71/135

Abstract: An inkjet printing apparatus, a dipole alignment method, and a display device manufacturing method are provided. The inkjet printing apparatus includes a stage, a print head part disposed above the stage, and an electric field generating part that provides an electric field to a space between the stage and the print head part. The dipole alignment method includes providing an electric field at an area above a target substrate, spraying ink including a dipole onto the target substrate through the area, and landing the dipole on the target substrate. The display device manufacturing method includes preparing a base layer on which first and second electrodes are disposed, spraying ink including a light emitting element onto the base layer through the area, landing the light emitting element between the first and second electrodes.

公开(公告)号：US11370218B2

公开(公告)日：2022-06-28

申请号：US17150521

申请日：2021-01-15

Applicant: Samsung Display Co., LTD.

Inventor： Futoshi Yoshida ,  Cheong Wan Min ,  Min A Han ,  Jae Bum Pahk ,  Jeong Ho Yi ,  Heung Cheol Jeong ,  Myung Soo Huh

IPC: B41J2/045 ,  B41J2/175 ,  B41J2/18 ,  B41J2/14

Abstract: An inkjet print apparatus includes a print head discharging ink onto a substrate, the print head including a first heater; a reservoir storing the ink; a first pipe supplying the ink to the reservoir; a second pipe collecting surplus ink; a mixing unit located on the first pipe and mixing the ink; a pump located on the second pipe and pressurizing and supplying the surplus ink to the reservoir; a temperature sensor located between the mixing unit and the print head and sensing a temperature of the ink; and a controller controlling a temperature of at least one of the first heater and the second heater in response to information received from the temperature sensor. The print head includes a heat insulator blocking heat emitted from the first heater between the substrate and the first heater.

公开(公告)号：US12109806B2

公开(公告)日：2024-10-08

申请号：US17904370

申请日：2020-06-02

Applicant: Samsung Display Co., LTD.

Inventor： Byung Chul Lee ,  Heung Cheol Jeong ,  Myung Soo Huh ,  Cheol Lae Roh ,  Do Hun Lee

IPC: B41J2/045 ,  G01N15/1434 ,  G01N15/14

CPC classification number: B41J2/0451 ,  B41J2/04586 ,  G01N15/1434 ,  G01N2015/1486

Abstract: Provided are an inkjet printing apparatus and a method for inspecting an inkjet head using same. The inkjet printing apparatus comprises: an inspection stage unit on which an inspection substrate is seated; an inkjet head unit including at least one inkjet head that ejects ink containing dipoles and a solvent in which the dipoles disperse, on the inspection stage unit; and a particle count inspection unit that is located so as to be spaced apart from the inkjet head unit in one direction. The particle count inspection unit comprises: a first heat treatment unit that is located on the top portion of the inspection stage unit; and a first sensing unit that is located on the bottom portion of the inspection stage unit and measures the number of dipoles sprayed onto the inspection substrate.

公开(公告)号：US11685154B2

公开(公告)日：2023-06-27

申请号：US17420438

申请日：2019-03-13

Applicant: Samsung Display Co., LTD.

Inventor： Byung Chui Lee ,  Heung Cheol Jeong ,  Myung Soo Huh ,  Min Soo Kim ,  Jae Ha Lim

IPC: B41J2/045

CPC classification number: B41J2/04558 ,  B41J2/0456 ,  B41J2/04586

Abstract: An inkjet printing device includes a stage part including a stage, an inkjet head part including at least one inkjet head that disposes an ink on the stage, the ink including dipoles and a solvent having the dipoles, a heat treatment device that removes the solvent, a first sensing part that measures a position of the ink disposed on the stage, a second sensing part that measures a position of the inkjet head, and a third sensing part that measures a position of each of the dipoles disposed on the stage. A dipole aligning method includes disposing an ink on a substrate, the ink including dipoles and a solvent having the dipoles, generating an electric field on the substrate and disposing the dipoles on the substrate by the electric field, removing the solvent, and measuring a position of each of the dipoles disposed on the substrate.