公开(公告)号：US20230217815A1

公开(公告)日：2023-07-06

申请号：US18079709

申请日：2022-12-12

Applicant: LG Display Co., Ltd.

Inventor： Wook SONG ,  Min Hyeong HWANG ,  Myeong Seon CHO ,  Chun Ki KIM ,  Sae Mi PARK ,  Young Jun YU ,  Jung Keun KIM ,  Byung Soo KIM ,  Sang Beom KIM

IPC: H10K85/60 ,  H10K59/35

CPC classification number: H01L51/0067 ,  H01L27/3211 ,  H01L51/0072 ,  H01L51/006 ,  H01L51/0061 ,  H01L51/5072

Abstract: A light emitting device and a light emitting display including the same. The light emitting device includes an anode and a cathode facing each other, a first stack and a second stack disposed between the anode and the cathode, the first stack including a first electron transport layer comprising a first material represented by Formula 1, a first blue light emitting layer containing a boron-based compound emitting light having a wavelength of 430 nm to 480 nm, and a first electron-blocking layer including a second material including a spirofluorene group, and at least one hydrogen atom on at least one side of the spirofluorene group is substituted by deuterium, and the second stack including at least two phosphorescent light emitting layers emitting light having a longer wavelength than that of the light emitted by the first blue light emitting layer, and a charge generation layer.

公开(公告)号：US20250143065A1

公开(公告)日：2025-05-01

申请号：US18882158

申请日：2024-09-11

Applicant: LG Display Co., Ltd.

Inventor： Yu Jeong LEE ,  Chun Ki KIM

IPC: H10K50/12 ,  H10K50/19 ,  H10K101/40 ,  H10K102/00

Abstract: A display apparatus including a light-emitting device is discussed. The light-emitting device can include a light-emitting unit between an anode electrode and a cathode electrode. The light-emitting unit can include at least one blue emission stack. The blue emission stack can include a first light-emitting layer and a second light-emitting layer contacting a surface of the first light-emitting layer toward the cathode electrode. A host of the second light-emitting layer can have a higher triplet energy level than a host of the first light-emitting layer. Thus, in the display apparatus, deterioration in the efficiency and life-span of the light-emitting device due to the accumulation of triplet excitons can be prevented or minimized. As a result, low power driving is possible, and power consumption is reduced.

公开(公告)号：US20230217824A1

公开(公告)日：2023-07-06

申请号：US18148271

申请日：2022-12-29

Applicant: LG Display Co., Ltd.

Inventor： Chun Ki KIM ,  Yu Jeong LEE ,  Jung Keun KIM

IPC: H10K85/60 ,  C09K11/06 ,  H10K85/30

CPC classification number: H10K85/6572 ,  C09K11/06 ,  H10K85/654 ,  H10K85/624 ,  H10K85/6574 ,  H10K85/322 ,  H10K50/11

Abstract: Disclosed are a light emitting device that includes an additional layer adjacent to a light emitting layer and thus is capable of utilizing, in light emission, holes not used in the light emitting layer, to improve efficiency and lifespan, and a light emitting display device including the same. The light emitting device includes a first electrode and a second electrode facing each other, and an unit comprising a hole transport layer, a light emitting layer, an efficiency-improving layer, and an electron transport layer sequentially stacked between the first electrode and the second electrode, wherein the light emitting layer includes a first host comprising an anthracene derivative and a first blue light emitting dopant, and the efficiency-improving layer includes a second host having bipolarity and a second blue light emitting dopant.

公开(公告)号：US20220208860A1

公开(公告)日：2022-06-30

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

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.