公开(公告)号：US20230057758A1

公开(公告)日：2023-02-23

申请号：US17794201

申请日：2020-02-07

Applicant: SHARP KABUSHIKI KAISHA

Inventor： MANABU NIBOSHI ,  TOKIYOSHI UMEDA ,  YUTO TSUKAMOTO

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

Abstract: A display device includes a light-emitting element layer including light-emitting elements in a plurality of kinds each emitting a light in a different color. A first electrode of the light-emitting elements includes a plurality of reflective layers including one RM and one TE stacked on the RM. The plurality of the reflective layers are stacked so that the RM and the TE are alternatively arranged in the stated order.

公开(公告)号：US20210135137A1

公开(公告)日：2021-05-06

申请号：US16644042

申请日：2017-09-05

Applicant: SHARP KABUSHIKI KAISHA

Inventor： YUTO TSUKAMOTO ,  SHINICHI KAWATO ,  TOKIYOSHI UMEDA ,  MANABU NIBOSHI ,  YOUHEI NAKANISHI ,  HISAYUKI UTSUMI ,  MASAYUKI KANEHIRO ,  SHOTA OKAMOTO

IPC: H01L51/50 ,  H01L51/56

Abstract: To provide a light-emitting device that easily generates energy transition to fluorescent materials having a peak of the light emission spectrum in the deep-blue region and has improved efficiency of light emission, provided is a light-emitting device including a light-emitting layer in which quantum dots and light emitters being phosphors or phosphorescent members are dispersed, a first electrode in a lower layer than the light-emitting layer, and a second electrode in an upper layer than the light-emitting layer, wherein a light emission spectrum of the quantum dots and an absorption spectrum of the light emitters at least partially overlap each other.

公开(公告)号：US20210066630A1

公开(公告)日：2021-03-04

申请号：US16644057

申请日：2017-09-05

Applicant: SHARP KABUSHIKI KAISHA

Inventor： YUTO TSUKAMOTO ,  SHINICHI KAWATO ,  TOKIYOSHI UMEDA ,  MANABU NIBOSHI ,  YOUHEI NAKANISHI ,  HISAYUKI UTSUMI ,  MASAYUKI KANEHIRO ,  SHOTA OKAMOTO

IPC: H01L51/50 ,  H01L27/32 ,  H01L51/56

Abstract: To provide a light-emitting device that can obtain fluorescence having a narrow spectrum more efficiently, a light-emitting device includes: a light-emitting layer in which thermally activated delayed fluorescence bodies and quantum dots are dispersed; a first electrode in a lower layer than the light-emitting layer and a second electrode in an upper layer than the light-emitting layer, wherein a light emission spectrum of the thermally activated delayed fluorescence bodies and an absorption spectrum of the quantum dots at least partially overlap each other.

公开(公告)号：US20200381669A1

公开(公告)日：2020-12-03

申请号：US16766506

申请日：2017-11-30

Applicant: SHARP KABUSHIKI KAISHA

Inventor： HIDEFUMI YOSHIDA ,  KIYOSHI MINOURA ,  TOKIYOSHI UMEDA ,  KAORU ABE ,  AKIRA SAKAI

IPC: H01L51/52 ,  H01L27/32 ,  H01L51/56

Abstract: A display device, to provide compensation for change in color level due to different viewing directions of a display surface and compensation for other optical characteristics of the display surface in a compatible manner, includes a light-emitting element layer including a light-emitting layer including a light-emitting element, a first electrode disposed below the light-emitting layer, and a second electrode disposed above the light-emitting layer, wherein an optical compensation layer is disposed above the light-emitting element layer, the optical compensation layer being configured to compensate for prevention of external light reflection on a display surface and compensate for change in color level of the display surface due to different viewing directions of the display surface.

公开(公告)号：US20230309334A1

公开(公告)日：2023-09-28

申请号：US18022128

申请日：2020-08-19

Applicant: SHARP KABUSHIKI KAISHA

Inventor： BAI ZHANG ,  Koji YASUKAWA ,  TOKIYOSHI UMEDA ,  Naoki UETAKE

IPC: H10K50/18 ,  H10K59/12

CPC classification number: H10K50/181 ,  H10K59/1201 ,  H10K50/16

Abstract: A display device includes a hole transport layer common to a plurality of light-emitting elements between a light-emitting layer and an anode electrode below thereof in the light-emitting element in each pixel. The hole transport layer includes a hole transport section that transports positive holes to the light-emitting layer, and an adjacent pixel hole blocking section that is formed in a portion between the light-emitting elements in adjacent pixels and blocks transportation of positive holes between the light-emitting elements in adjacent pixels.

公开(公告)号：US20220158045A1

公开(公告)日：2022-05-19

申请号：US17437810

申请日：2019-03-22

Applicant: SHARP KABUSHIKI KAISHA

Inventor： KOJI MURATA ,  TOKIYOSHI UMEDA ,  YUTO TSUKAMOTO

IPC: H01L33/50

Abstract: A display device includes a light-emitting layer and a red converting layer, the red converting layer includes a binder resin, red luminescent bodies, and In nanoparticles, each of the In nanoparticles includes a core and a silica shell, and the silica shell includes blue luminescent bodies emitting light having a wavelength shorter than that of red luminescent bodies.

公开(公告)号：US20210320151A1

公开(公告)日：2021-10-14

申请号：US17273690

申请日：2018-09-11

Applicant: SHARP KABUSHIKI KAISHA

Inventor： TOKIYOSHI UMEDA ,  YUTO TSUKAMOTO ,  BAI ZHANG ,  SHINICHI KAWATO

IPC: H01L27/32 ,  H01L51/52

Abstract: The light-emitting device includes a light-emitting element in which a first electrode, a light-emitting layer, and a second electrode are sequentially layered toward a side of a light-emitting face. Further, the light-emitting device includes, on a side of the light-emitting face of the second electrode, a complementary color light absorption layer configured to absorb complementary color light of light emitted by the light-emitting element.

公开(公告)号：US20210119160A1

公开(公告)日：2021-04-22

申请号：US17041134

申请日：2018-03-28

Applicant: SHARP KABUSHIKI KAISHA

Inventor： TOKIYOSHI UMEDA ,  YUTO TSUKAMOTO ,  MASAYUKI KANEHIRO ,  YOUHEI NAKANISHI

IPC: H01L51/50 ,  H01L27/32

Abstract: A light-emitting element includes a light-emitting layer, a hole transportation layer, and an electron transportation layer. The light-emitting layer includes a quantum dot dopant, and a host formed of a hole transport host and an electron transport host. The quantum dot dopant emits light as a result of exciton energy generated in the host transitioning to the quantum dot dopant.

公开(公告)号：US20240008357A1

公开(公告)日：2024-01-04

申请号：US18035747

申请日：2020-11-12

Applicant: SHARP KABUSHIKI KAISHA

Inventor： MANABU NIBOSHI ,  YUTO TSUKAMOTO ,  TOKIYOSHI UMEDA

IPC: H10K85/50

CPC classification number: H10K85/50 ,  H10K50/181

Abstract: A light-emitting element includes a first electrode, a second electrode, a light-emitting layer provided between the first electrode and the second electrode and including a material having a perovskite structure, and a blocking layer provided in at least one of a position between the first electrode and the light-emitting layer or a position between the second electrode and the light-emitting layer, and configured to suppress migration of charges from the light-emitting layer.

公开(公告)号：US20210328198A1

公开(公告)日：2021-10-21

申请号：US17273288

申请日：2018-09-11

Applicant: SHARP KABUSHIKI KAISHA

Inventor： TOKIYOSHI UMEDA ,  YUTO TSUKAMOTO ,  BAI ZHANG ,  SHINICHI KAWATO

IPC: H01L51/52 ,  H01L27/32

Abstract: The light-emitting device includes a light-emitting element in which a first electrode, a light-emitting layer, and a second electrode are sequentially layered toward a light-emitting face side. The plurality of light-emitting elements include a first light-emitting element configured to emit light of a first color, a second light-emitting element configured to emit light of a second color different from the first color, and a third light-emitting element configured to emit light of a third color different from the first color and the second color. The light-emitting device includes a light absorption layer on the light-emitting face side of the second electrode, in plane view, in common at positions where the light absorption layer is superimposed on the plurality of light-emitting elements, and the light absorption layer absorbs the light of the first color, the light of the second color, and the light of the third color.