公开(公告)号：US10396302B2

公开(公告)日：2019-08-27

申请号：US15810209

申请日：2017-11-13

Applicant: Japan Display Inc.

Inventor： Jun Takagi

IPC: H01L29/08 ,  H01L51/50 ,  H01L27/32

Abstract: An electroluminescence display device includes a first pixel electrode; a second pixel electrode provided in the same layer as the first pixel electrode; a counter electrode provided on the first pixel electrode and the second pixel electrode; a first organic light emitting layer provided between the first pixel electrode and the counter electrode, the first organic light emitting layer emitting light having a first wavelength; and a second organic light emitting layer provided between the second pixel electrode and the counter electrode, the second organic light emitting layer emitting light having a second wavelength. The first light emitting layer contains a host material, a first dopant material and a first assist dopant material; and the second light emitting layer contains the host material, a second dopant material and a second assist dopant material.

公开(公告)号：US10103344B2

公开(公告)日：2018-10-16

申请号：US15810197

申请日：2017-11-13

Applicant: Japan Display Inc.

Inventor： Jun Takagi

IPC: H01L51/50 ,  H01L27/32

Abstract: An electroluminescence display device includes a pixel electrode; a first organic layer provided on the pixel electrode; a light emitting layer provided on the first organic layer; a second organic layer provided on the light emitting layer; and a counter electrode provided on the second organic layer. The light emitting layer includes a host material, a light emitting dopant material and an assist dopant material. The light emitting dopant material has a first concentration distribution in a thickness direction of the light emitting layer; the assist dopant material has a second concentration distribution in the thickness direction of the light emitting layer; and the first concentration distribution has a concentration peak in a range of the second concentration distribution.

公开(公告)号：US09478742B2

公开(公告)日：2016-10-25

申请号：US14471025

申请日：2014-08-28

Applicant: Japan Display Inc.

Inventor： Jun Takagi ,  Toshihiro Sato

IPC: H01L51/50 ,  H01L21/31 ,  H01L51/56 ,  H01L51/00 ,  H01L51/52 ,  H01L27/32

CPC classification number: H01L51/0021 ,  H01L27/3246 ,  H01L51/5209 ,  H01L51/5218

Abstract: Light emitted within an organic EL device is effectively utilized, and a pixel is provided for improving the extraction efficiency of the light. Light extraction is efficiency is improved without increasing a current by effectively utilizing guided wave light which is a cause of the loss of light emitted by an organic EL device. In order to achieve this, a stepped portion is arrange in an insulating layer provided over a lower layer of a first electrode including a light reflecting surface, and a peripheral area of the first electrode is formed so as to contact the stepped portion. The reflecting surface is formed curved towards a second electrode side in the peripheral area of the first electrode from the stepped portion, light guided through the organic EL layer is reflected by the reflecting surface and emitted from the second electrode side.

Abstract translation: 有效地利用在有机EL器件内发射的光，并且提供用于提高光的提取效率的像素。 通过有效地利用作为有机EL元件发出的光的损失的原因的导波光而不增加电流，提高光提取效率。 为了实现这一点，在设置在包括光反射表面的第一电极的下层上的绝缘层中布置有阶梯部分，并且形成第一电极的周边区域以与台阶部分接触。 反射面从阶梯部向第一电极的周边区域朝向第二电极侧弯曲，由有机EL层引导的光被反射面反射并从第二电极侧发射。

公开(公告)号：US20160104860A1

公开(公告)日：2016-04-14

申请号：US14877716

申请日：2015-10-07

Applicant: Japan Display Inc.

Inventor： Koji Yasukawa ,  Jun Takagi

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

CPC classification number: H01L51/5234 ,  H01L27/3244 ,  H01L51/5044 ,  H01L51/5218 ,  H01L51/5253 ,  H01L51/5278 ,  H01L2251/308

Abstract: An organic electroluminescent element is formed to have a transparent electrode as a cathode. An ultraviolet-absorbing layer having a higher ultraviolet absorptivity than the transparent electrode is formed on the transparent electrode. A sealing film is formed on the ultraviolet-absorbing layer by a plasma CVD process.

Abstract translation: 有机电致发光元件形成为具有作为阴极的透明电极。 在透明电极上形成具有比透明电极高的紫外线吸收性的紫外线吸收层。 通过等离子体CVD法在紫外线吸收层上形成密封膜。

公开(公告)号：US11233108B2

公开(公告)日：2022-01-25

申请号：US16844007

申请日：2020-04-09

Applicant: Japan Display Inc.

Inventor： Jun Takagi

IPC: H01L27/32 ,  H01L51/50

Abstract: A display device according to an embodiment of the present invention includes: a substrate; a first organic light-emitting diode including a first lower electrode provided above the substrate and for each pixel, a first organic layer provided above the first lower electrode, a first light-emitting layer provided within the first organic layer and for each pixel and including a thermally activated material, and an upper electrode provided above the first organic layer; and a first drive TFT provided between the substrate and the first organic light-emitting diode, connected to the first lower electrode, and arranged overlapping the first light-emitting layer as viewed in a plan view.

公开(公告)号：US10658625B2

公开(公告)日：2020-05-19

申请号：US16122370

申请日：2018-09-05

Applicant: Japan Display Inc.

Inventor： Jun Takagi

IPC: H01L51/52 ,  H01L27/32 ,  H01L51/00 ,  H01L51/50 ,  G09G3/3266 ,  G09G3/3275 ,  G09G3/3225

Abstract: A display device includes: a substrate; a first organic light-emitting diode including a first electrode provided above the substrate for each of pixels, a second electrode, and a first light-emitting layer provided between the first electrode and the second electrode; and a heat-generating member supplying heat to the first light-emitting layer.

公开(公告)号：US20190074470A1

公开(公告)日：2019-03-07

申请号：US16122370

申请日：2018-09-05

Applicant: Japan Display Inc.

Inventor： Jun Takagi

IPC: H01L51/52 ,  H01L27/32 ,  H01L51/00 ,  H01L51/50

Abstract: A display device includes: a substrate; a first organic light-emitting diode including a first electrode provided above the substrate for each of pixels, a second electrode, and a first light-emitting layer provided between the first electrode and the second electrode; and a heat-generating member supplying heat to the first light-emitting layer.