公开(公告)号：US10424500B2

公开(公告)日：2019-09-24

申请号：US14808009

申请日：2015-07-24

Applicant: LG Electronics Inc.

Inventor： Younghak Chang ,  Jina Jeon

IPC: H01L21/683 ,  H01L25/075 ,  H01L33/24 ,  H01L33/38 ,  H01L33/62 ,  H02N13/00 ,  H01L33/00

Abstract: A method of transferring a semiconductor light emitting device, and which includes positioning a transfer head having a head electrode facing a semiconductor light emitting device having an undoped semiconductor layer, the semiconductor light emitting device arranged on a carrier substrate; moving the head electrode of the transfer head close to the undoped semiconductor layer of the semiconductor light emitting device; applying a voltage to the head electrode to provide an attachment force to the undoped semiconductor layer by an electrostatic force; and picking-up the semiconductor light emitting device and transferring the semiconductor light emitting device to base substrate.

公开(公告)号：US11990565B2

公开(公告)日：2024-05-21

申请号：US17266406

申请日：2018-08-29

Applicant: LG ELECTRONICS INC.

Inventor： Jungsub Kim ,  Sunghyun Moon ,  Younghak Chang ,  Jina Jeon

IPC: H01L21/78 ,  H01L25/075 ,  H01L33/38 ,  H01L33/40 ,  H01L33/44

CPC classification number: H01L33/38 ,  H01L21/7806 ,  H01L25/0753 ,  H01L33/40 ,  H01L33/44 ,  H01L2933/0016 ,  H01L2933/0025

Abstract: Discussed is a display device having a plurality of semiconductor light-emitting diodes. At least one of the semiconductor light-emitting diodes has a first conductive electrode and a second conductive electrode; a first conductive semiconductor layer on which the first conductive electrode is disposed; a second conductive semiconductor layer that overlaps with the first conductive semiconductor layer, and the second conductive electrode being disposed on the second conductive semiconductor layer; an active layer disposed between the first conductive semiconductor layer and the second conductive semiconductor layer; an undoped semiconductor layer disposed on the second conductive semiconductor layer; and protrusions formed of a porous material allowing electropolishing, and on the undoped semiconductor layer.

公开(公告)号：US11322488B2

公开(公告)日：2022-05-03

申请号：US16627566

申请日：2017-07-04

Applicant: LG ELECTRONICS INC.

Inventor： Younghak Chang

IPC: H01L33/36 ,  H01L25/075 ,  H01L33/00 ,  H01L27/15 ,  H01L33/38 ,  H01L33/46 ,  H01L33/62 ,  H01L33/50

Abstract: The present invention relates to a display device and, more particularly, to a display device using a semiconductor light emitting element. The display device according to the present invention comprises a light emitting element module, wherein the light emitting element module comprises: a red semiconductor light emitting element that emits red light; a green semiconductor light emitting element that is disposed on the top surface of the red semiconductor light emitting element; a blue semiconductor light emitting element that is disposed on the top surface of the green semiconductor light emitting element; an individual electrode portion for supplying an individual signal to each of the red semiconductor light emitting element, the green semiconductor light emitting element, and the blue semiconductor light emitting element; and a common electrode portion for supplying a common signal to the red semiconductor light emitting element, the green semiconductor light emitting element, and the blue semiconductor light emitting element.

公开(公告)号：US11942457B2

公开(公告)日：2024-03-26

申请号：US17713927

申请日：2022-04-05

Applicant: LG ELECTRONICS INC.

Inventor： Younghak Chang

IPC: H01L33/00 ,  H01L25/075 ,  H01L27/15 ,  H01L33/38 ,  H01L33/46 ,  H01L33/62 ,  H01L33/50

CPC classification number: H01L25/0756 ,  H01L25/0753 ,  H01L27/156 ,  H01L33/0093 ,  H01L33/38 ,  H01L33/46 ,  H01L33/62 ,  H01L33/505

Abstract: Discussed is a display device including a light emitting element module on a substrate, wherein the light emitting element module includes a plurality of semiconductor light emitting elements disposed on the substrate, a plurality of individual electrode portions electrically connected to each of the plurality of semiconductor light emitting elements and a common electrode portion electrically connected to each of the plurality of semiconductor light emitting elements, and wherein each of the individual electrode portions is disposed on different sides of the light emitting element module.

公开(公告)号：US10854692B2

公开(公告)日：2020-12-01

申请号：US15963691

申请日：2018-04-26

Applicant: LG ELECTRONICS INC.

Inventor： Younghak Chang ,  Sukkoo Jung

IPC: H01L27/32 ,  H01L33/24 ,  H01L25/075 ,  H01L33/50 ,  H01L33/46

Abstract: The present invention relates to a display device, and particularly, to a display device using a semiconductor light emitting device. The display device includes a substrate including an electrode, a plurality of light emitting devices assembled on the substrate, and a color conversion part stacked on the plurality of semiconductor light emitting devices and converting a color. Specifically, the color conversion part includes: a porous layer, a wavelength conversion layer, and a reflective layer, wherein the wavelength conversion layer is disposed between the porous layer and the reflective layer, and the porous layer is formed of an electro-polishable porous terminal. A surface of the reflective layer includes a first region and a second region surrounded by the first region, the second region has roughness higher than that of the first region, and a plurality of first protrusions are disposed in the second region.

公开(公告)号：US12237359B2

公开(公告)日：2025-02-25

申请号：US17257190

申请日：2018-07-11

Applicant: LG ELECTRONICS INC.

Inventor： Jungsub Kim ,  Younghak Chang ,  Myoungsoo Kim ,  Yeonhong Jung

IPC: H01L27/15 ,  H01L33/02 ,  H01L33/20 ,  H01L33/38

Abstract: Discussed is a plurality of semiconductor light-emitting devices, wherein at least one of the semiconductor light-emitting devices includes: a first conductive electrode and a second conductive electrode; a first conductive semiconductor layer having the first conductive electrode arranged thereon; a second conductive semiconductor layer overlapping the first conductive semiconductor layer and having the second conductive electrode arranged thereon; an active layer arranged between the first conductive semiconductor layer and the second conductive semiconductor layer; an intermediate layer arranged on the second conductive semiconductor layer; a protrusion, made of an electro-polishable porous material, on the intermediate layer; and an undoped semiconductor layer arranged between the intermediate layer and the protrusion. The intermediate layer includes a first layer including second conductive impurities and a second layer having a higher concentration of the second conductive impurities than the first layer, wherein the first layer and the second layer are sequentially and repetitively stacked.

公开(公告)号：US10950583B2

公开(公告)日：2021-03-16

申请号：US15754900

申请日：2016-08-26

Applicant: LG ELECTRONICS INC.

Inventor： Sunghyun Moon ,  Younghak Chang ,  Jina Jeon ,  Seonhoo Kim ,  Youngjoo Yee ,  Hwankuk Yuh

IPC: H01L25/075 ,  H01L21/677 ,  H01L21/683 ,  H01L33/22 ,  H01L33/00 ,  H01L33/62

Abstract: The present invention relates to a display device and, more particularly, to a transfer head for a semiconductor light-emitting device applied to the display device and a method for transferring a semiconductor light-emitting device. The transfer head for a semiconductor light-emitting device, according to the present invention, comprises: a base substrate; and an electrode unit disposed on the base substrate to generate an electrostatic force by charging an un-doped semiconductor layer of the semiconductor light-emitting device with electric charges, wherein the base substrate and the electrode unit are formed of light-transmitting materials so that at least a part of the semiconductor light-emitting device is viewable through the base substrate and the electrode unit in sequence.

公开(公告)号：US10446529B2

公开(公告)日：2019-10-15

申请号：US15874720

申请日：2018-01-18

Applicant: LG ELECTRONICS INC.

Inventor： Younghak Chang ,  Minwoo Lee ,  Yeonhong Jung ,  Youngje Jo

IPC: H01L25/07 ,  H01L25/075 ,  H01L33/02 ,  H01L33/00 ,  H01L33/20 ,  H01L33/62 ,  H01L33/16 ,  H01L33/22 ,  H01L33/32

Abstract: A semiconductor light emitting device including a first conductive electrode and a second conductive electrode; a first conductive semiconductor layer on which the first conductive electrode is disposed; a second conductive semiconductor layer overlapping the first conductive semiconductor layer, on which the second conductive electrode is disposed; and an active layer disposed between the first conductive semiconductor layer and the second conductive semiconductor layer. Further, the second conductive semiconductor layer includes a first layer including a porous material capable of being electro-polished and disposed on an outer surface of the semiconductor light emitting device; a second layer disposed under the first layer and having a lower impurity concentration than the first layer; and a third layer disposed between the second layer and the active layer and having a higher impurity concentration than the second layer.