公开(公告)号：US20220209200A1

公开(公告)日：2022-06-30

申请号：US17331406

申请日：2021-05-26

Applicant: LG Display Co., Ltd.

Inventor： Chun Ki Kim ,  Jung Keun Kim ,  Yu Jeong Lee ,  Wook Song

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

Abstract: Disclosed are a light-emitting device and a display device including the same. An emissive layer is formed so as to have a dual-layer structure, the triplet energy level of a dopant of a first emissive layer adjacent to a hole transport layer is greater than the triplet energy level of a first host in the first emissive layer, and the triplet energy level of the first host is greater than the triplet energy level of a second host of a second emissive layer, whereby triplet excitons generated in the first emissive layer are recycled to the second emissive layer so as to be reused for light emission.

公开(公告)号：US12207520B2

公开(公告)日：2025-01-21

申请号：US17562491

申请日：2021-12-27

Applicant: LG DISPLAY CO., LTD.

Inventor： Hong Seok Choi ,  Chun Ki Kim ,  Ahn Ki Kim ,  Kyung Hoon Han

IPC: H01L27/32 ,  H10K59/122 ,  H10K59/38

Abstract: A light-emitting device includes a light-emitting layer between a first electrode and a second electrode, he light emitted from the light-emitting device may display a white color, the light-emitting layer may include a plurality of emission stacks, each of the emission stacks includes at least one emission material layer, one of the emission stacks may include a stacked structure of a red emission material layer and a blue emission material layer, thus improving the white balance and increasing color viewing angle.

公开(公告)号：US11925047B2

公开(公告)日：2024-03-05

申请号：US17331406

申请日：2021-05-26

Applicant: LG Display Co., Ltd.

Inventor： Chun Ki Kim ,  Jung Keun Kim ,  Yu Jeong Lee ,  Wook Song

IPC: H10K50/19 ,  H10K50/11 ,  H10K59/12 ,  H10K59/38 ,  H10K101/10 ,  H10K101/30 ,  H10K101/00 ,  H10K102/00

CPC classification number: H10K50/19 ,  H10K50/11 ,  H10K59/12 ,  H10K59/38 ,  H10K2101/10 ,  H10K2101/30 ,  H10K2101/90 ,  H10K2102/3035

Abstract: Disclosed are a light-emitting device and a display device including the same. An emissive layer is formed so as to have a dual-layer structure, the triplet energy level of a dopant of a first emissive layer adjacent to a hole transport layer is greater than the triplet energy level of a first host in the first emissive layer, and the triplet energy level of the first host is greater than the triplet energy level of a second host of a second emissive layer, whereby triplet excitons generated in the first emissive layer are recycled to the second emissive layer so as to be reused for light emission.

公开(公告)号：US20230255078A1

公开(公告)日：2023-08-10

申请号：US18078886

申请日：2022-12-09

Applicant: LG Display Co., Ltd.

Inventor： Wook Song ,  Yu Jeong Lee ,  Byung Gun Ahn ,  Mi Young Han ,  Chun Ki Kim ,  Sae Mi Park ,  Jung Keun Kim ,  Byung Soo Kim

IPC: H10K59/35 ,  H10K50/13 ,  H10K50/17 ,  H10K50/16 ,  H10K59/38 ,  C07D401/14 ,  C07D209/08

CPC classification number: H01L27/3213 ,  C07D209/08 ,  C07D401/14 ,  H01L27/322 ,  H01L51/504 ,  H01L51/5072 ,  H01L51/5092

Abstract: A light emitting device is capable of improving the efficiency in the visible light wavelength in a structure in which light extraction efficiency is improved through a microlens array. The light emitting display device includes a substrate having a plurality of subpixels, each comprising a light emitting region and a non-light emitting region, an over-coating layer having irregularities on a surface thereof in at least the light emitting region, and a light emitting device disposed on the surface of the over-coating layer, the light emitting device comprising an anode and a cathode facing each other, and at least two blue stacks and a phosphorescent stack between the anode and the cathode, at least one of the blue stacks is the blue light emitting layer and includes an electron transport layer including a first material, the electron transport layer being in contact with the blue light emitting layer.

公开(公告)号：US20230217821A1

公开(公告)日：2023-07-06

申请号：US18078731

申请日：2022-12-09

Applicant: LG Display Co., Ltd.

Inventor： Wook Song ,  Sae Mi Park ,  Myeong Seon Cho ,  Min Hyeong Hwang ,  Chun Ki Kim ,  Jung Keun Kim ,  Byung Soo Kim ,  Young Jun Yu ,  Sang Beom Kim

IPC: H10K85/60 ,  H10K50/13 ,  C07D401/14 ,  C09K11/06 ,  C07D235/18 ,  C07D235/08 ,  C07C211/61

CPC classification number: H01L51/0072 ,  H01L51/504 ,  C07D401/14 ,  C09K11/06 ,  H01L51/0067 ,  C07D235/18 ,  H01L51/0052 ,  H01L51/0058 ,  C07D235/08 ,  C07C211/61 ,  H01L51/006 ,  H01L51/005 ,  H01L51/5072

Abstract: A light emitting device and a light emitting display device that are capable of improving efficiency, driving voltage, and lifespan by varying the configuration of a layer adjacent to a blue light emitting layer in a blue fluorescent stack contacting a cathode are disclosed. The light emitting device includes stacks between an anode and a cathode, wherein an nth stack contacting the cathode is a first blue stack that includes a first hole transport layer, a first electron-blocking layer, a first blue light emitting layer containing a boron-based dopant having an emission peak of 430 nm to 480 nm, a first electron transport layer contacting the first blue light emitting layer, and an electron injection layer having two sides contacting the first electron transport layer and the cathode, respectively, wherein the first electron transport layer contains a mixture of a first material and a second material.