公开(公告)号：US09698353B2

公开(公告)日：2017-07-04

申请号：US14681558

申请日：2015-04-08

Applicant: SEIKO EPSON CORPORATION

Inventor： Tetsuji Fujita ,  Yuiga Hamade

IPC: H01L51/00 ,  H01L51/50

CPC classification number: H01L51/0061 ,  H01L51/0054 ,  H01L51/0055 ,  H01L51/0058 ,  H01L51/0068 ,  H01L51/0071 ,  H01L51/5012 ,  H01L51/5072 ,  H01L2251/558

Abstract: A light-emitting element includes an anode, a cathode, and a light emission layer. The light emission layer is arranged between the anode and the cathode and configured to emit light by energization between the anode and the cathode. The light emission layer includes a compound represented by a general formula NIR-D as a light emission material and a compound represented by a formula IRH-1 as a host material of the light emission material. The general formula NIR-D is in which each R independently indicates group comprising a phenyl group, a thiophenyl group, a furyl group, or at least one species of derivatives thereof. The formula IRH-1 is in which n indicates a natural number 1 to 12, and each R independently indicates a hydrogen atom, an alkyl group, an optionally substituted aryl group, or an arylamino group.

公开(公告)号：US11675205B2

公开(公告)日：2023-06-13

申请号：US17683685

申请日：2022-03-01

Applicant: SEIKO EPSON CORPORATION

Inventor： Hidetoshi Yamamoto ,  Yuiga Hamade

IPC: G02B27/14 ,  G02B27/01 ,  G03B33/12 ,  H10K59/50 ,  H10K59/131 ,  H10K59/35

CPC classification number: G02B27/141 ,  G02B27/0172 ,  G03B33/12 ,  H10K59/131 ,  H10K59/353 ,  H10K59/50 ,  G02B2027/0114 ,  G02B2027/0178

Abstract: An image display device according to the present disclosure includes a first self-luminous display element that self-emits an image of first color light, a second self-luminous display element that self-emits an image of second color light, a third self-luminous display element that self-emits an image of third color light, and a prism including a dichroic mirror that synthesizes images of three colors, the first, the second, and the third self-luminous display element are each configured to extract light from a side of a semireflective semitransmissive electrode included in the first, the second, and the third self-luminous display element, and at least one of sums of a thickness of a transparent electrode and a thickness of an optical adjustment layer differs from other in the first, the second, and the third self-luminous display element.

公开(公告)号：US11644679B2

公开(公告)日：2023-05-09

申请号：US17384813

申请日：2021-07-26

Applicant: SEIKO EPSON CORPORATION

Inventor： Yuiga Hamade ,  Takumi Kodama

IPC: G02B27/12 ,  H10K59/121 ,  H01L27/12

CPC classification number: G02B27/126 ,  H10K59/1213 ,  H01L27/1222 ,  H01L27/1237

Abstract: An image light generation device includes a first panel configured to emit a first image light including a blue wavelength region, a second panel configured to emit a second image light including a wavelength region different from the blue wavelength region, and a color combining prism configured to combine the first image light and the second image light. The first panel includes a plurality of first pixels, each of the plurality of first pixels includes a first light emitting element, and a first transistor provided corresponding to the first light emitting element, the second panel includes a plurality of second pixels, each of the plurality of second pixels includes a second light emitting element, and a second transistor provided corresponding to the second light emitting element, and a size of the first transistor is greater than a size of the second transistor.

公开(公告)号：US10804472B2

公开(公告)日：2020-10-13

申请号：US15913047

申请日：2018-03-06

Applicant: SEIKO EPSON CORPORATION

Inventor： Hidetoshi Yamamoto ,  Yuiga Hamade ,  Tetsuji Fujita

IPC: H01L51/00 ,  G06K9/00 ,  H01L51/50

Abstract: A light-emitting element according to the invention includes an anode, a cathode, and a light-emitting layer which is provided between the anode and the cathode, contains a light-emitting material and a host material that holds the light-emitting material, and emits light having a peak wavelength in a near-infrared region by applying a current between the anode and the cathode, wherein the content of the light-emitting material in the light-emitting layer is 30 wt % or more and 70 wt % or less. Further, it is preferred that the light-emitting layer emits light having the peak wavelength of 700 nm or more and 960 nm or less.

公开(公告)号：US10431761B2

公开(公告)日：2019-10-01

申请号：US15322999

申请日：2015-06-22

Applicant: Seiko Epson Corporation

Inventor： Yuiga Hamade ,  Tetsuji Fujita

IPC: H01L51/50 ,  C07D513/04 ,  C09K11/06 ,  H01L51/00

Abstract: To provide a light-emitting element which emits light in a near-infrared range and has high efficiency and long life, and a light-emitting device, an authentication device, and an electronic apparatus, each of which includes this light-emitting element.A light-emitting element 1 of the invention includes an anode 3, a cathode 8, a light-emitting layer 5 which is provided between the anode 3 and the cathode 8 and emits light in a wavelength range of 700 nm or more by applying a current between the anode 3 and the cathode 8, and an electron transport layer 6 which is provided between the light-emitting layer 5 and the cathode 8, and includes a first electron transport layer 6b located on the cathode 8 side and a second electron transport layer 6a located on the light-emitting layer 5 side, wherein the first electron transport layer 6b contains a first anthracene-based compound, which has an anthracene skeleton and a nitrogen-containing heterocyclic skeleton, and has an average thickness of less than 8 nm, and the second electron transport layer 6a contains a second anthracene-based compound, which has an anthracene skeleton but does not have a heterocyclic skeleton.