公开(公告)号：US20240206331A1

公开(公告)日：2024-06-20

申请号：US18242196

申请日：2023-09-05

Applicant: LG Display Co., Ltd.

Inventor： Yu-Jeong LEE ,  Jun-Su HA ,  Chun-Ki KIM

IPC: H10K85/60

CPC classification number: H10K85/6572 ,  H10K85/615 ,  H10K85/624 ,  H10K85/6574 ,  H10K50/166

Abstract: An organic light emitting diode (OLED) is described, as well as a display device, e.g., a display device or a lighting device that includes the OLED. The OLED includes a first electron transport layer having a first electron transporting material of a benzimidazole-based compound substituted with at least one anthracenyl group, and a second electron transport layer having a second electron transporting material of a benzimidazole-based compound substituted with at least one fluorenyl group having a spiro structure. An electron injection layer and/or a charge generation layer includes a phenanthroline-based compound. The second electron transport has an electron transport material with excellent thermal stability, disposed adjacently to the electron injection layer and/or the charge generation layer, so that the OLED can maintain good luminescent intensity in an environment of high temperature and implement beneficial luminous properties.

公开(公告)号：US20240276762A1

公开(公告)日：2024-08-15

申请号：US18399302

申请日：2023-12-28

Applicant: LG Display Co., Ltd.

Inventor： Ju-Hyuk KWON ,  Eun-Jung PARK ,  Jang-Dae YOUN ,  Yu-Jeong LEE ,  Hyun-Jin CHO ,  Jun-Su HA

IPC: H10K50/858 ,  H10K50/19

CPC classification number: H10K50/858 ,  H10K50/19 ,  H10K50/15 ,  H10K85/624 ,  H10K85/626 ,  H10K85/633 ,  H10K85/636 ,  H10K85/6574 ,  H10K85/6576

Abstract: An organic light emitting diode (OLED) and an organic light emitting device (e.g., a display device or a lighting device) thereof are described. The OLED comprises a first electrode, a second electrode, a first emitting part (including a first hole transporting layer (HTL) and a first emitting material layer (EML), positioned between the first and second electrodes); and a second emitting part (including a second EML and positioned between the first emitting part and the second electrode). The first EML is a blue EML, and the second EML includes at least one of a red EML and a blue EML. The first hole HTL includes a high refractive layer having a first refractive index, and a low refractive layer having a second refractive index, positioned between the high refractive layer and the first EML, where the second refractive index is smaller than the first refractive index.

公开(公告)号：US20240276747A1

公开(公告)日：2024-08-15

申请号：US18239882

申请日：2023-08-30

Applicant: LG Display Co., Ltd.

Inventor： Jun-Su HA ,  Shin-Young JEONG ,  Yu-Jeong LEE ,  Hyun-Jin CHO ,  Eun-Jung PARK ,  Ju-Hyuk KWON ,  Jang-Dae YOUN

IPC: H10K50/11 ,  C09K11/02 ,  C09K11/06 ,  H10K50/13 ,  H10K85/60

CPC classification number: H10K50/11 ,  C09K11/02 ,  C09K11/06 ,  H10K50/131 ,  H10K85/622 ,  H10K85/626 ,  H10K85/6574 ,  H10K2101/30 ,  H10K2101/40

Abstract: An organic light emitting diode (OLED) and an organic light emitting device comprising the OLED (e.g., a display device or a lighting device) are described. The OLED can include a first blue emitting material layer including a first host, and a second blue emitting material layer including a second host, disposed between two electrodes. The OLED includes two blue emitting material layers so that an exciton recombination zone is distributed within the blue emitting material layers irrespective of current density or gradation. As the amount of non-emitting excitons accumulated outside of the emitting material layers is minimized, the driving voltage of the OLED can be lowered, and the luminous efficiency and the luminous lifespan of the OLED can be improved.

公开(公告)号：US20240260293A1

公开(公告)日：2024-08-01

申请号：US18220709

申请日：2023-07-11

Applicant: LG Display Co., Ltd.

Inventor： Yu-Jeong LEE ,  Hyun-Jin CHO ,  Eun-Jung PARK ,  Ju-Hyuk KWON ,  Jang-Dae YOUN ,  Shin-Young JEONG ,  Jun-Su HA

IPC: H10K50/12 ,  H10K50/13 ,  H10K50/15 ,  H10K50/18 ,  H10K85/60

CPC classification number: H10K50/12 ,  H10K50/13 ,  H10K50/15 ,  H10K50/181 ,  H10K85/626 ,  H10K85/6574 ,  H10K2101/30

Abstract: An organic light emitting diode (OLED) and an organic light emitting device comprising the OLED (e.g., a display device or a lighting device) are described. The OLED can include a blue emitting material layer including plural hosts with adjusted energy levels. A HOMO energy barrier between the at least one blue emitting material layer and at least one hole transport layer and/or electron blocking layer can be minimized. Holes generated at an anode or a P-type charge generation layer can be injected rapidly into the at least one blue emitting material layer without accumulating at an interface between the hole transport layer and/or the electron blocking layer, and the at least one blue emitting material layer. As the amount of non-emitting holes is minimized, the driving voltage of the OLED can be lowered, and the luminous efficiency and the luminous lifespan of the OLED can be improved.

公开(公告)号：US20240244969A1

公开(公告)日：2024-07-18

申请号：US18231450

申请日：2023-08-08

Applicant: LG Display Co., Ltd.

Inventor： Ju-Hyuk KWON ,  Chun-Ki KIM ,  Yu-Jeong LEE ,  Eun-Jung PARK ,  Jang-Dae YOUN ,  Hyun-Jin CHO ,  Jun-Su HA

IPC: H10K85/60 ,  C09K11/06

CPC classification number: H10K85/658 ,  C09K11/06 ,  H10K85/622 ,  H10K85/626 ,  H10K85/6574 ,  H10K50/12

Abstract: An organic light emitting diode (OLED) and an organic light emitting device comprising the OLED are described. The OLED can comprise a first electrode; a second electrode facing the first electrode; and a first emitting part (including a first blue emitting layer and a second blue emitting layer), which is positioned between the first and second electrode. The second blue emitting layer is positioned between the first blue emitting layer and the second electrode and contacting the first blue emitting layer. The first blue emitting layer includes a first host and a first dopant, and the second blue emitting layer includes a second host and a second dopant, wherein the first host is a pyrene derivative, and the second host is an anthracene derivative. An organic light emitting device can include the OLED, and can be a display device or a lighting device.

公开(公告)号：US20240237517A1

公开(公告)日：2024-07-11

申请号：US18242851

申请日：2023-09-06

Applicant: LG Display Co., Ltd.

Inventor： Yu-Jeong LEE ,  Sang-Beom KIM ,  Eun-Jung PARK ,  Ju-Hyuk KWON ,  Jang-Dae YOUN ,  Shin-Young JEONG ,  Hyun-Jin CHO ,  Jun-Su HA

IPC: H10K85/60 ,  H10K50/13

CPC classification number: H10K85/654 ,  H10K50/13 ,  H10K85/615 ,  H10K85/626 ,  H10K85/6572 ,  H10K50/166

Abstract: An organic light emitting diode (OLED) is described, having an emissive layer with an emitting part including at least one emitting material layer, a first electron transport layer, and a second electron transport layer disposed sequentially between two facing electrodes. The first electron transport layer includes a first electron transporting material of an azine-containing compound and the second electron transport layer includes a second electron transporting material of a benzimidazole-containing compound. The first electron transport layer, with controlled electron transporting property and energy level, is disposed adjacently to the at least one emitting material layer and the second electron transporting layer is disposed adjacently to the second electrode or an electron injection layer so that the OLED can lower driving voltage and can maximize luminous efficiency and luminous lifespan. An organic light emitting device including the OLED can be a display device or a lighting device.