公开(公告)号：US10707448B2

公开(公告)日：2020-07-07

申请号：US16525461

申请日：2019-07-29

Applicant: LG Display Co., Ltd.

Inventor： JiYoung Kim ,  SeUng Kim ,  JungSoo Park

IPC: H01L51/52 ,  H01L51/50 ,  H01L27/32

Abstract: An organic light-emitting diode includes a first electrode, a first light-emitting unit (EL unit) disposed on the first electrode and including a first organic light-emitting layer, a first charge generating layer on the first EL unit, a second EL unit disposed on the first charge generating layer and including a second organic light-emitting layer, a third organic light-emitting layer and a fourth organic light-emitting layer, a second charge generating layer on the second EL unit, a third EL unit disposed on the second charge generating layer and including a fifth organic light-emitting layer, and a second electrode on the third EL unit. A dopant concentration of the third organic light-emitting layer is greater than a dopant concentration of the fourth organic light-emitting layer. An organic light emitting display device can include the organic light-emitting diode.

公开(公告)号：US10950812B2

公开(公告)日：2021-03-16

申请号：US15192487

申请日：2016-06-24

Applicant: LG DISPLAY CO., LTD.

Inventor： Yoondeok Han ,  JaeMan Lee ,  SoYeon Ahn ,  Heedong Choi ,  JungSoo Park

IPC: H01L51/50 ,  H01L27/32 ,  H01L51/52

Abstract: Discussed is an organic light emitting display device. The organic light emitting display device can include a first emission part, a second emission part on the first emission part, and a first P-type charge generation layer between the first emission part and the second emission part. The first emission part includes a first hole transport layer, a first emission layer, and a first electron transport layer. The second emission part includes a second hole transport layer, a second emission layer, and a second electron transport layer. The second hole transport layer and the first P-type charge generation layer are disposed adjacent to each other. The second hole transport layer includes a first material and a second material. The first material has an absolute value of a HOMO energy level which can be greater than an absolute value of a LUMO energy level of the first P-type charge generation layer.

公开(公告)号：US10043856B2

公开(公告)日：2018-08-07

申请号：US15808027

申请日：2017-11-09

Applicant: LG DISPLAY CO., LTD.

Inventor： Taesun Yoo ,  Hongseok Choi ,  Mi-Young Han ,  JungSoo Park

IPC: H01L51/50 ,  H01L27/32

Abstract: Disclosed is an organic light emitting display device. The organic light emitting display device includes an emission part which is disposed between an anode and a cathode and includes an emission layer. The emission part includes at least two emission layers emitting lights of different colors and a recombination zone movement prevention layer. The at least two emission layers each includes at least one host and at least one dopant, and the recombination zone movement prevention layer is disposed on a specific emission layer among the at least two emission layers.

公开(公告)号：US10003038B2

公开(公告)日：2018-06-19

申请号：US15220117

申请日：2016-07-26

Applicant: LG DISPLAY CO., LTD.

Inventor： Mi-Young Han ,  Hongseok Choi ,  Taesun Yoo ,  JungSoo Park

IPC: H01L51/50

CPC classification number: H01L51/504 ,  H01L51/5004 ,  H01L51/5012 ,  H01L51/5044 ,  H01L51/5056 ,  H01L51/5072 ,  H01L51/508 ,  H01L2251/5384 ,  H01L2251/552 ,  H01L2251/558

Abstract: Discussed herein is an organic light-emitting device capable of increasing luminous efficiency and panel efficiency while improving color gamut. The organic light-emitting device includes a red organic light emitting layer including a single host material of hole transport type and a yellow-green organic light emitting layer including a plurality of host materials in a light-emitting stack. Instead of using an additional host material for the organic light emitting layers, the material of the electron transport layer and the material of the hole transport layer is used as the host material of the yellow-green organic light emitting layer, and the material of the hole transport layer is used as the host material of the red organic light emitting layer. Accordingly, the number of materials of the organic light emitting layers is reduced, such that the fabricating process becomes simpler.

公开(公告)号：US09978970B2

公开(公告)日：2018-05-22

申请号：US15195024

申请日：2016-06-28

Applicant: LG Display Co., Ltd.

Inventor： JaeMan Lee ,  Taesun Yoo ,  Mi-Young Han ,  SoYeon Ahn ,  Heedong Choi ,  JungSoo Park ,  Yoondeok Han

IPC: H01L27/32 ,  H01L51/54 ,  H01L51/50 ,  H01L51/52

CPC classification number: H01L51/5004 ,  H01L27/3209 ,  H01L27/3211 ,  H01L51/5056 ,  H01L51/5072 ,  H01L51/5088 ,  H01L51/5271 ,  H01L51/5278 ,  H01L2251/552

Abstract: An organic light emitting device including an organic light emitting element having a low driving voltage and a high luminous efficiency is provided. The organic light emitting device includes two or more stack emission units, and a charge generating layer including an N-type charge generating layer and a P-type charge generating layer is disposed between the stack emission units. Herein, the P-type charge generating layer is formed of a material having an LUMO energy level similar to an HOMO energy level of a hole transporting layer injected with holes from the P-type charge generating layer. Accordingly, even if the P-type charge generating layer is not additionally doped with a P-type dopant, it is possible to readily inject holes into a stack emission unit adjacent to the P-type charge generating layer.

公开(公告)号：US10056571B2

公开(公告)日：2018-08-21

申请号：US15163462

申请日：2016-05-24

Applicant: LG DISPLAY CO., LTD.

Inventor： Yoondeok Han ,  Hongseok Choi ,  SoYeon Ahn ,  JungSoo Park ,  Yosub Lee

IPC: H01L51/50 ,  H01L51/52 ,  H01L27/32 ,  H01L27/12

CPC classification number: H01L51/504 ,  H01L27/124 ,  H01L27/1248 ,  H01L27/3209 ,  H01L27/3246 ,  H01L27/3248 ,  H01L27/3258 ,  H01L27/3262 ,  H01L27/3276 ,  H01L51/5004 ,  H01L51/5056 ,  H01L51/5072 ,  H01L51/5278 ,  H01L2251/5384 ,  H01L2251/552

Abstract: An organic light emitting display device includes: a first light emitting unit including a first light emitting layer; and a second light emitting unit on the first light emitting unit including a second light emitting layer. The first light emitting layer includes at least one dopant and at least two hosts. The at least two hosts are different from each other in electron mobility and hole mobility.

公开(公告)号：US09842885B2

公开(公告)日：2017-12-12

申请号：US15181793

申请日：2016-06-14

Applicant: LG DISPLAY CO., LTD.

Inventor： Taesun Yoo ,  Hongseok Choi ,  Mi-Young Han ,  JungSoo Park

IPC: H01L27/32 ,  H01L51/50

CPC classification number: H01L27/3206 ,  H01L27/3209 ,  H01L27/3244 ,  H01L51/5024 ,  H01L51/504 ,  H01L51/5096

Abstract: Disclosed is an organic light emitting display device. The organic light emitting display device includes an emission part which is disposed between an anode and a cathode and includes an emission layer. The emission part includes at least two emission layers emitting lights of different colors and a recombination zone movement prevention layer. The at least two emission layers each includes at least one host and at least one dopant, and the recombination zone movement prevention layer is disposed on a specific emission layer among the at least two emission layers.

公开(公告)号：US10418593B2

公开(公告)日：2019-09-17

申请号：US16022081

申请日：2018-06-28

Applicant: LG Display Co., Ltd.

Inventor： JiYoung Kim ,  SeUng Kim ,  JungSoo Park

IPC: H01L51/52 ,  H01L51/50 ,  H01L27/32

Abstract: An organic light-emitting diode includes a first electrode, a first light-emitting unit (EL unit) disposed on the first electrode and including a first organic light-emitting layer, a first charge generating layer on the first EL unit, a second EL unit disposed on the first charge generating layer and including a second organic light-emitting layer, a third organic light-emitting layer and a fourth organic light-emitting layer, a second charge generating layer on the second EL unit, a third EL unit disposed on the second charge generating layer and including a fifth organic light-emitting layer, and a second electrode on the third EL unit. A dopant concentration of the third organic light-emitting layer is greater than a dopant concentration of the fourth organic light-emitting layer. An organic light emitting display device can include the organic light-emitting diode.

公开(公告)号：US09893298B2

公开(公告)日：2018-02-13

申请号：US14955259

申请日：2015-12-01

Applicant: LG Display Co., Ltd.

Inventor： Jeongdae Seo ,  ChangWook Han ,  SungHoon Joo ,  Hyoseok Kim ,  Hyeseung Kang ,  Seonkeun Yoo ,  JungSoo Park

IPC: C09K11/02 ,  H01L51/00 ,  H01L27/32 ,  H01L51/50 ,  C07D401/10 ,  H01L51/52

CPC classification number: H01L51/0072 ,  C07D401/10 ,  C09K11/025 ,  H01L27/3244 ,  H01L51/0058 ,  H01L51/0067 ,  H01L51/5044 ,  H01L51/5056 ,  H01L51/5072 ,  H01L51/5278 ,  H01L2251/5315 ,  H01L2251/5384

Abstract: An organic light emitting display device is disclosed. The organic light emitting display device comprises an emitting layer over an anode, the light emitting part having an emitting layer and an electron transporting layer, and a cathode on the light emitting part, wherein each of the emitting layer and the electron transporting layer includes a compound with the same core to facilitate electron transport from the electron transporting layer to the emitting layer.