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公开(公告)号：US10777614B2
公开(公告)日：2020-09-15
申请号：US16283907
申请日：2019-02-25
Applicant: Japan Display Inc.
Inventor： Koji Yasukawa
Abstract: Provided is a display device having first to third light-emitting elements. The first to third light-emitting elements each include: a first electrode; a hole-transporting layer over the first electrode; an emission layer over the hole-transporting layer; a hole-blocking layer over and in contact with the emission layer; an electron-transporting layer over and in contact with the hole-blocking layer; and a second electrode over the electron-transporting layer. An emission wavelength of the second light-emitting element is longer than that of the first light-emitting element and shorter than that of the third light-emitting element. A total thickness of the hole-blocking layer and the electron-transporting layer in the second light-emitting element is larger than that in the first light-emitting element and smaller than that in the third light-emitting element. A thickness of the hole-blocking layer is larger than that of the electron-transporting layer in each of the first to third light-emitting elements.
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公开(公告)号：US10121829B2
公开(公告)日：2018-11-06
申请号：US15816246
申请日：2017-11-17
Applicant: Japan Display Inc.
Inventor： Masato Ito , Shigeru Sakamoto , Koji Yasukawa
Abstract: Provided is a display device including first to third pixels and first to fourth cap layers. The first cap layer is located over and overlaps with the first to third light-emitting elements and extends from the first pixel to the third pixel through the second pixel. The second and third cap layers are located over the first cap layer and respectively overlap with the second and third light-emitting elements. The fourth cap layer is located over the first to fourth cap layers. The first to third pixels are arranged in this order. The first to third light-emitting elements are configured so that an emission wavelength of the second light-emitting element is shorter than an emission wavelength of the third light-emitting element and longer than an emission wavelength of the first light-emitting element. A thickness of the third cap layer is larger than a thickness of the second cap layer.
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公开(公告)号：US09666651B2
公开(公告)日：2017-05-30
申请号：US14858789
申请日：2015-09-18
Applicant: Japan Display Inc.
Inventor： Toshihiro Sato , Koji Yasukawa , Masakazu Gunji
CPC classification number: H01L27/3246 , H01L51/5056 , H01L51/5088
Abstract: A display device includes a plurality of pixel electrodes which are provided separately from each other on an insulative surface; a first layer which is provided separately from each other on the respective plurality of pixel electrodes, and includes a plurality of first carrier transport layers or a plurality of first carrier injection layers; a pixel separation film which is provided on the first layer, and includes a plurality of opening portions in each region which overlaps with the respective plurality of pixel electrodes in a planar view; a light emitting layer which is provided so as to cover at least one of the plurality of opening portions; a second layer which is provided on the light emitting layer, and includes a second carrier transport layer or a second carrier injection layer; and a counter electrode which is provided on the second layer.
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4.发明申请ORGANIC ELECTROLUMINESCENT DISPLAY DEVICE AND METHOD FOR MANUFACTURING THE SAME 审中-公开有机电致发光显示装置及其制造方法公开(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
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。
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公开(公告)号：US10672845B2
公开(公告)日：2020-06-02
申请号：US16025122
申请日：2018-07-02
Applicant: Japan Display Inc.
Inventor： Koji Yasukawa , Hajime Akimoto
Abstract: A display device according to an embodiment of the present invention includes: an underlying structure layer; a first lower electrode that is arranged on the underlying structure layer; multiple lower electrodes including a second lower electrode adjacent to the first lower electrode; an organic layer that is arranged on the multiple lower electrodes; an upper electrode that is arranged on the organic layer; a first through hole that is arranged between the first lower electrode and the second lower electrode and includes a first inorganic layer at least in a part of an inner face; and a second inorganic layer that is arranged on the upper electrode and is in contact with the first inorganic layer in the inner face of the first through hole.
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Patent Agency Ranking
公开(公告)号：US10128454B2
公开(公告)日：2018-11-13
申请号：US15791532
申请日：2017-10-24
Applicant: Japan Display Inc.
Inventor： Koji Yasukawa
Abstract: A display device includes an anode, a hole injection layer, a hole transport layer, a blue light emitting layer, a hole blocking layer, an electron transport layer and/or an electron injection layer, and a cathode, which are stacked in this order, and has the following characteristics (i), (ii), and (iii): (i) the hole mobility of the blue light emitting layer≥the electron mobility of the blue light emitting layer, (ii) the hole mobility of the hole transport layer≥the electron mobility of the blue light emitting layer, and (iii) |the HOMO value of the blue light emitting layer−the HOMO value of the hole blocking layer|≥0.4 eV.
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公开(公告)号：US20180182823A1
公开(公告)日：2018-06-28
申请号：US15816246
申请日：2017-11-17
Applicant: Japan Display Inc.
Inventor： Masato Ito , Shigeru Sakamoto , Koji Yasukawa
CPC classification number: H01L27/3206 , H01L27/3244 , H01L33/08 , H01L51/5012 , H01L51/5036 , H01L51/5056 , H01L51/5237 , H01L51/5253 , H01L51/5256 , H01L51/5265 , H01L2227/323 , H01L2251/558
Abstract: Provided is a display device including first to third pixels and first to fourth cap layers. The first cap layer is located over and overlaps with the first to third light-emitting elements and extends from the first pixel to the third pixel through the second pixel. The second and third cap layers are located over the first cap layer and respectively overlap with the second and third light-emitting elements. The fourth cap layer is located over the first to fourth cap layers. The first to third pixels are arranged in this order. The first to third light-emitting elements are configured so that an emission wavelength of the second light-emitting element is shorter than an emission wavelength of the third light-emitting element and longer than an emission wavelength of the first light-emitting element. A thickness of the third cap layer is larger than a thickness of the second cap layer.
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公开(公告)号：US10483480B2
公开(公告)日：2019-11-19
申请号：US16047076
申请日：2018-07-27
Applicant: Japan Display Inc.
Inventor： Koji Yasukawa
Abstract: A display device including a pixel electrode, a counter electrode, and an organic layer arranged between the pixel electrode and the counter electrode, wherein the organic layer includes a hole injection layer in contact with the pixel electrode, a hole transport layer above the hole injection layer, a light emitting layer and an electron transport layer, the hole injection layer includes an inorganic material, and the inorganic material has a work function of 4.4 eV or less and includes one element or a plurality of elements selected from Na, Mg, K, Rb, Sr, Cs, Ba, Fr, Ca, Yb, Li, Al, Sm, Er and Ho, or a fluoride or an oxide of the elements.
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公开(公告)号：US20190280056A1
公开(公告)日：2019-09-12
申请号：US16283907
申请日：2019-02-25
Applicant: Japan Display Inc.
Inventor： Koji Yasukawa
Abstract: Provided is a display device having first to third light-emitting elements. The first to third light-emitting elements each include: a first electrode; a hole-transporting layer over the first electrode; an emission layer over the hole-transporting layer; a hole-blocking layer over and in contact with the emission layer; an electron-transporting layer over and in contact with the hole-blocking layer; and a second electrode over the electron-transporting layer. An emission wavelength of the second light-emitting element is longer than that of the first light-emitting element and shorter than that of the third light-emitting element. A total thickness of the hole-blocking layer and the electron-transporting layer in the second light-emitting element is larger than that in the first light-emitting element and smaller than that in the third light-emitting element. A thickness of the hole-blocking layer is larger than that of the electron-transporting layer in each of the first to third light-emitting elements.
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公开(公告)号：US10050232B2
公开(公告)日：2018-08-14
申请号：US15712317
申请日：2017-09-22
Applicant: Japan Display Inc.
Inventor： Koji Yasukawa
Abstract: A light emitting device includes a pixel electrode, an organic layer, and a counter electrode, wherein the organic layer includes a first organic layer having a hole injecting property, a second organic layer having a hole transporting property, a third organic layer having an electron blocking property, a light emitting layer containing a host material and a dopant material, a fourth organic layer having a hole blocking property, and a fifth organic layer having an electron transporting property, wherein the fifth organic layer includes an alkali metal such as calcium or lithium and the like or an alkaline earth metal, and a total layer thickness of the first organic layer, the second organic layer, and the third organic layer is smaller than a total layer thickness of the fourth organic layer and the fifth organic layer.
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