公开(公告)号：US11309526B2

公开(公告)日：2022-04-19

申请号：US16593031

申请日：2019-10-04

Applicant: LG Display Co., Ltd.

Inventor： Jung-Shik Lim ,  Sun-Man Kim ,  Min-Gyu Lee

IPC: H01L51/52 ,  H01L27/32

Abstract: A display device having a light-emitting device is provided. The display device can include a buffer insulating layer disposed on a path of light emitted from the light-emitting device. The buffer insulating layer can have a stacked structure of a first buffer insulating layer having the refractive index which decreases in a direction away from the light-emitting device, and a second buffer insulating layer having the refractive index which increases in a direction away from the light-emitting device. Thus, in the display device, the unintended constructive and destructive interference of the light emitted from the light-emitting device can be prevented. Therefore, in the display device, the luminous efficacy can be increased, and the variation of color coordinates can be prevented.

公开(公告)号：US10431765B2

公开(公告)日：2019-10-01

申请号：US15693098

申请日：2017-08-31

Applicant: LG Display Co., Ltd.

Inventor： Ji-Young Kim ,  Youn-Seok Kam ,  Ki-Woog Song ,  Tae-Shick Kim ,  Min-Gyu Lee ,  Tae-Seok Lim

IPC: H01L51/50 ,  H01L51/00 ,  H01L51/52 ,  H01L27/32

Abstract: Disclosed are a tandem white organic light emitting diode with long lifespan and low driving voltage, and a display device including the same. The white organic light emitting diode includes a first light emitting part, a second light emitting part and a third light emitting part disposed between a first electrode and a second electrode. The first and third light emitting parts include a blue light emitting layer and the second light emitting part includes a red light emitting layer and a yellow-green light emitting layer. At least one layer of the red light emitting layer and the yellow-green light emitting layer includes a hole transport host based on a compound shown below: wherein each of R1, R2, and R3 are independently selected from hydrogen, heavy hydrogen, a C5-C7 aromatic cyclic and C1-C6 heterocyclic group.

公开(公告)号：US20220199929A1

公开(公告)日：2022-06-23

申请号：US17537251

申请日：2021-11-29

Applicant: LG Display Co., Ltd.

Inventor： Jin-Hwan Park ,  Min-Gyu Lee ,  Jung-Shik Lim

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

Abstract: An organic light-emitting diode display device includes a first electrode, a first stack emitting blue light, a first charge generation layer on the first stack; a second stack emitting yellow-green light, a second charge generation layer on the second stack, a third stack emitting blue light, and a second electrode on the third stack, wherein at least one of the first stack and the third stack further emits red light, wherein the at least one of the first stack and the third stack includes a first red emitting material layer and a blue emitting material layer, and wherein each of the first red emitting material layer and the blue emitting material layer includes a host and a dopant, and a T1 energy of the host of the blue emitting material layer is greater than a T1 energy of the dopant of the first red emitting material layer.

公开(公告)号：US20180062103A1

公开(公告)日：2018-03-01

申请号：US15693098

申请日：2017-08-31

Applicant: LG Display Co., Ltd.

Inventor： Ji-Young Kim ,  Youn-Seok Kam ,  Ki-Woog Song ,  Tae-Shick Kim ,  Min-Gyu Lee ,  Tae-Seok Lim

IPC: H01L51/50

CPC classification number: H01L51/5044 ,  H01L27/3244 ,  H01L51/0072 ,  H01L51/5004 ,  H01L51/5036 ,  H01L51/5072 ,  H01L51/5278 ,  H01L2251/5384

Abstract: Disclosed are a tandem white organic light emitting diode with long lifespan and low driving voltage, and a display device including the same. The white organic light emitting diode includes a first light emitting part, a second light emitting part and a third light emitting part disposed between a first electrode and a second electrode. The first and third light emitting parts include a blue light emitting layer and the second light emitting part includes a red light emitting layer and a yellow-green light emitting layer. At least one layer of the red light emitting layer and the yellow-green light emitting layer includes a hole transport host based on a compound shown below: wherein each of R1, R2, and R3 are independently selected from hydrogen, heavy hydrogen, a C5-C7 aromatic cyclic and C1-C6 heterocyclic group.