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    DISPLAY DEVICE
    2.
    发明公开
    DISPLAY DEVICE 审中-公开

    公开(公告)号：US20230232649A1

    公开(公告)日：2023-07-20

    申请号：US17979551

    申请日：2022-11-02

    Applicant: Samsung Display Co., Ltd.

    Inventor： HYEONGPIL KIM ,  BEOMJOON KIM ,  ILHA SONG ,  DAEWOONG LEE ,  BORA LEE ,  ILLHUN CHO

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

    CPC classification number: H01L51/504 ,  H01L51/5092 ,  H01L27/3246 ,  H01L51/5218 ,  H01L51/5072 ,  H01L51/5056

    Abstract: A display device including a base layer including a first pixel area configured to emit a first light therefrom and a second pixel area configured to emit a second light therefrom, a first electrode on the base layer, a second electrode on the first electrode and facing the first electrode, first light emitting stacks between the first and second electrodes and in the first pixel area, a first charge generation layer between the first light emitting stacks, second light emitting stacks between the first and second electrodes and in the second pixel area, and a second charge generation layer between the second light emitting stacks. The first charge generation layer includes a first metal, the second charge generation layer includes a second metal different from the first metal, and the second metal has a work function equal to or greater than 1.7 eV and equal to or smaller than 3.2 eV.

    LIGHT EMITTING ELEMENT AND DISPLAY DEVICE INCLUDING THE SAME
    3.
    发明申请
    LIGHT EMITTING ELEMENT AND DISPLAY DEVICE INCLUDING THE SAME 有权

    公开(公告)号：US20230129980A1

    公开(公告)日：2023-04-27

    申请号：US17835229

    申请日：2022-06-08

    Applicant: Samsung Display Co., Ltd.

    Inventor： HYOMIN KO ,  ILSOO OH ,  BORA LEE ,  ILLHUN CHO ,  MINJI KIM

    IPC: C07C211/54 ,  C07D307/91 ,  C07D333/76 ,  C07D209/82 ,  C07D405/12 ,  C07D409/12 ,  C07F5/02 ,  H01L51/00

    Abstract: A light emitting element includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region, wherein the hole transport region includes a first hole transport layer disposed adjacent to the first electrode and including a first amine compound having a first refractive index, a second hole transport layer disposed between the first hole transport layer and the emission layer, and including a second amine compound having a second refractive index greater than the first refractive index, and a third hole transport layer disposed between the second hole transport layer and the emission layer, and including a third amine compound having a third refractive index less than the second refractive index, thereby having high luminous efficiency.

    LIGHT EMITTING DIODE AND DISPLAY DEVICE INCLUDING THE SAME
    4.
    发明申请
    LIGHT EMITTING DIODE AND DISPLAY DEVICE INCLUDING THE SAME 有权

    公开(公告)号：US20220407028A1

    公开(公告)日：2022-12-22

    申请号：US17874578

    申请日：2022-07-27

    Applicant: Samsung Display Co., Ltd.

    Inventor： BORA LEE ,  HYOMIN KO ,  ILLHUN CHO ,  EUNJAE JEONG ,  MINJI KIM ,  SOHEE JO ,  DONGJUN KIM ,  HANKYU PAK ,  SANGHYUN HAN

    IPC: H01L51/50 ,  C09K11/06 ,  C07C211/54 ,  C07D307/91 ,  C07C211/61 ,  C07D209/88 ,  C07D333/76

    Abstract: A light emitting diode of an embodiment includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region. The hole transport region includes a first hole transport layer disposed adjacent to the first electrode and having a first refractive index, a second hole transport layer disposed adjacent to the emission layer and having a second refractive index, and a third hole transport layer disposed between the first hole transport layer and the second hole transport layer and having a third refractive index which is greater than each of the first refractive index and the second refractive index, thereby showing high light extraction efficiency and high emission efficiency properties.

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