公开(公告)号：US20230217770A1

公开(公告)日：2023-07-06

申请号：US18071697

申请日：2022-11-30

Applicant: LG Display Co., Ltd.

Inventor： Sae Mi Park ,  Myeong Seon Cho ,  Wook Song

IPC: H01L51/00

CPC classification number: H01L27/322 ,  H01L27/3244

Abstract: Disclosed is a light emitting display device configured to have a structure in which an auxiliary conversion portion including color conversion layers having different transmission characteristics and overlapping each other is applied to a non-emission portion of a subpixel, whereby luminous efficacy is improved and current-density-specific color purity is equalized, and therefore image quality is improved.

公开(公告)号：US20230217822A1

公开(公告)日：2023-07-06

申请号：US18088430

申请日：2022-12-23

Applicant: LG Display Co., Ltd.

Inventor： Wook Song ,  Ji Cheol Shin ,  Sae Mi Park ,  Myeong Seon Cho ,  Hui Kun Yun ,  Jung Keun Kim ,  Byung Soo Kim

IPC: H10K85/60 ,  H10K50/19 ,  H10K85/30

CPC classification number: H10K85/6572 ,  H10K50/19 ,  H10K85/631 ,  H10K85/636 ,  H10K85/626 ,  H10K85/658 ,  H10K85/342 ,  H10K59/12

Abstract: Disclosed is a light emitting device that is capable of reducing lateral leakage current and a driving voltage by improving a structure for connecting a plurality of stacks to one another in a structure using the plurality of stacks, and a light emitting display device including the same. The light emitting device includes a first electrode and a second electrode facing each other, a plurality of stacks provided between the first electrode and the second electrode, and a charge generation layer including an electron generation layer and a hole generation layer stacked between the stacks, wherein the electron generation layer contains a first host of Formula 1 and a metal dopant, and the hole generation layer contains a second host and an organic dopant.

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.