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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
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.
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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.
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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.
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公开(公告)号：US20230217674A1
公开(公告)日：2023-07-06
申请号：US18086368
申请日：2022-12-21
Applicant: LG Display Co., Ltd.
Inventor： Yu Jeong Lee , Wook Song
CPC classification number: H10K50/15 , H10K50/16 , H10K50/181 , H10K50/12 , H10K50/13
Abstract: Disclosed are a light emitting element and a display device including the same, wherein a hole generation layer is further provided between a hole transport layer and an emission layer, in addition to an electron blocking layer, in order to control the speed of electrons and holes introduced into the emission layer, whereby it is possible to prevent accumulation of carriers at the electron blocking layer or the hole transport layer, and therefore it is possible to reduce turn-on voltage, to maintain uniform efficiency irrespective of change in current density, to prevent defects at specific gradation, and to increase lifetime.
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