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：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.