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公开(公告)号：US20210041748A1
公开(公告)日：2021-02-11
申请号：US17077412
申请日：2020-10-22
Applicant: Japan Display Inc.
Inventor： Noboru KUNIMATSU , Masaki MATSUMORI , Hidehiro SONODA , Yasushi TOMIOKA , Toshiki KANEKO
IPC: G02F1/1337 , G02F1/1339 , G02F1/1333 , G02F1/1362 , G02F1/1368 , G02F1/1343
Abstract: The present invention prevents the shaving of an alignment film caused by a columnar spacer in a liquid crystal display device of an IPS method using photo-alignment. A plinth higher than a pixel electrode is formed at a part where a columnar spacer formed over a counter substrate touches a TFT substrate. When an alignment film of a double-layered structure is applied over the pixel electrode and the plinth, the thickness of the alignment film over the plinth reduces by a leveling effect. When photo-alignment is applied in the state, a photodegraded upper alignment film over the plinth disappears and a lower alignment film having a high mechanical strength remains. As a result, it is possible to prevent the shaving of the alignment film.
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公开(公告)号：US20190121203A1
公开(公告)日：2019-04-25
申请号：US16226836
申请日：2018-12-20
Inventor： Hidehiro SONODA , Chikae MATSUI , Noboru KUNIMATSU
IPC: G02F1/1337 , G02F1/1339 , G02F1/1362 , G02F1/1335 , G02F1/1343 , G02F1/1368 , G02F1/1333
CPC classification number: G02F1/133711 , G02F1/133345 , G02F1/133514 , G02F1/1337 , G02F1/133719 , G02F1/133723 , G02F1/133788 , G02F1/1339 , G02F1/13394 , G02F1/134309 , G02F1/13439 , G02F1/136286 , G02F1/1368 , G02F2001/133519 , G02F2201/121 , G02F2201/123
Abstract: A liquid crystal display device includes a first substrate, a first alignment film formed over the first substrate, a second substrate, a second alignment film formed over the second substrate, a liquid crystal layer sandwiched between the first alignment film and the second alignment film, and a projecting portion formed over the second substrate. The first alignment film is a photo alignment film, and a thickness “d2” of the second alignment film over the projecting portion and a film thickness “d1” of a portion of the first alignment film facing the projecting portion satisfy formula (2), d2
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公开(公告)号：US20190094627A1
公开(公告)日：2019-03-28
申请号：US16143796
申请日：2018-09-27
Applicant: Japan Display Inc.
Inventor： Hidehiro SONODA , Masahiro KOSUGE , Yasushi TOMOKA , Takenori HIROTA , Noboru KUNIMATSU
IPC: G02F1/1337 , C09K19/56 , C09K19/54 , G02F1/1343
Abstract: According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate disposed to oppose the first substrate, a layer of liquid crystal located between the first substrate and the second substrate, and an alignment film disposed on the first substrate so as to be in contact with the layer of the liquid crystal. The liquid crystal has a refractive-index anisotropy Δn of 0.11 or more, the layer of the liquid crystal has a thickness d of 2.5 μm or less, and a product Δnd of the refractive-index anisotropy Δn and the thickness d is 0.20 or more but 0.31 or less. The transmissivity of light having a wavelength of 450 nm in the first substrate and the alignment film is 85% or more but 97% or less.
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公开(公告)号：US20190064619A1
公开(公告)日：2019-02-28
申请号：US16174438
申请日：2018-10-30
Applicant: Japan Display Inc.
Inventor： Yasushi TOMIOKA , Toshimasa ISHIGAKI , Hidehiro SONODA , Sumito UETA
IPC: G02F1/1362 , G02F1/1368 , G02F1/1337 , G02F1/1333 , G02F1/1335
Abstract: A liquid crystal display device comprising a TFT substrate having pixels each including a common electrode formed on an organic passivation film, an interlayer insulating film formed so as to cover the common electrode, a pixel electrode having a slit and formed on the interlayer insulating film, a through-hole formed in the organic passivation film and the interlayer insulating film, and a source electrode electrically conducted to the pixel electrode via the through-hole. A taper angle at a depth of D/2 of the through-hole is equal to or more than 50 degrees. The pixel electrode covers part of a side wall of the through-hole but does not cover the remaining part of the side wall of the through-hole. This configuration facilitates the alignment film material to flow into the through-hole, thereby solving a thickness unevenness of the alignment film in vicinity of the through-hole.
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公开(公告)号：US20180067350A1
公开(公告)日：2018-03-08
申请号：US15806478
申请日：2017-11-08
Applicant: Japan Display Inc.
Inventor： Takenori HIROTA , Yasuhiro KANAYA , Hidehiro SONODA , Toshiki KANEKO
IPC: G02F1/1339 , G02F1/1333
CPC classification number: G02F1/1339 , G02F1/133345 , G02F2001/133388
Abstract: A reliability of seal portion of a liquid crystal display device can be improved by the following structure. A liquid crystal display device includes: a TFT substrate which includes a display region and a terminal part, and has an inorganic insulating film formed on an organic passivation film and an alignment film formed over the inorganic insulating film; a counter substrate, the TFT substrate and the counter substrate bonded together by a sealing material formed at a seal part surrounding the display region; and a liquid crystal sealed inside. At the seal part, a transparent conductive oxide film is formed between the inorganic insulating film and the alignment film. The transparent conductive oxide film exists inside an edge of the TFT substrate and hence, the edge of the TFT substrate is free of the transparent conductive oxide film.
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Patent Agency Ranking
公开(公告)号：US20170363914A1
公开(公告)日：2017-12-21
申请号：US15696357
申请日：2017-09-06
Inventor： Noboru KUNIMATSU , Chikae MATSUI , Hidehiro SONODA , Yuko MATSUMOTO , Shoichi UCHINO , Masaki MATSUMORI , Yasushi TOMIOKA
IPC: G02F1/1337 , C09K19/56 , G02F1/1343 , H01L27/12 , G02F1/1368
CPC classification number: G02F1/133723 , C09K19/56 , G02F1/133711 , G02F1/133788 , G02F1/134363 , G02F1/1368 , H01L27/1262 , H01L27/1296 , Y10T428/10 , Y10T428/1005
Abstract: A liquid crystal display device includes a TFT substrate having a first alignment film and an opposing substrate having a second alignment film with liquid crystals sandwiched therebetween. One of the first and second alignment films, comprises a first polyimide produced via polyamide acid ester containing cyclobutane as a precursor and a second polyimide produced via polyamide acid as a precursor. The polyamide acid has a higher polarity than that of the polyamide acid ester. The one of the first and second alignment films is responsive to photo-alignment. A first side of the one of the first and second alignment films is adjacent to the liquid crystals, and a second side thereof is closer to one of the TFT substrate and the counter substrate than the first side. The first side contains more of the first polyimide and less of the second polyimide than the second side.
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公开(公告)号：US20170075179A1
公开(公告)日：2017-03-16
申请号：US15343329
申请日：2016-11-04
Applicant: Japan Display Inc.
Inventor： Yasushi TOMIOKA , Toshimasa ISHIGAKI , Hidehiro SONODA , Sumito UETA
IPC: G02F1/1362 , G02F1/1335 , G02F1/1337 , G02F1/1333 , G02F1/1368
CPC classification number: G02F1/136227 , G02F1/133345 , G02F1/133512 , G02F1/1337 , G02F1/133707 , G02F1/1368 , G02F2001/133357 , G02F2201/121 , G02F2201/123
Abstract: A liquid crystal display device comprising a TFT substrate having pixels each including a common electrode formed on an organic passivation film, an interlayer insulating film formed so as to cover the common electrode, a pixel electrode having a slit and formed on the interlayer insulating film, a through-hole formed in the organic passivation film and the interlayer insulating film, and a source electrode electrically conducted to the pixel electrode via the through-hole. A taper angle at a depth of D/2 of the through-hole is equal to or more than 50 degrees. The pixel electrode covers part of a side wall of the through-hole but does not cover the remaining part of the side wall of the through-hole. This configuration facilitates the alignment film material to flow into the through-hole, thereby solving a thickness unevenness of the alignment film in vicinity of the through-hole.
Abstract translation: 一种液晶显示装置，包括具有各自包括形成在有机钝化膜上的公共电极的像素的TFT基板，形成为覆盖公共电极的层间绝缘膜，形成在层间绝缘膜上的狭缝的像素电极， 在有机钝化膜和层间绝缘膜中形成的通孔以及通过该通孔向像素电极导电的源电极。 通孔深度D / 2处的锥角等于或大于50度。 像素电极覆盖通孔的侧壁的一部分，但不覆盖通孔的侧壁的剩余部分。 该结构使得取向膜材料流入通孔，从而解决了通孔附近的取向膜的厚度不均匀性。
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公开(公告)号：US20160085119A1
公开(公告)日：2016-03-24
申请号：US14858821
申请日：2015-09-18
Applicant: Japan Display Inc.
Inventor： Takenori HIROTA , Yosuke HYODO , Noboru KUNIMATSU , Yasushi TOMIOKA , Hidehiro SONODA
IPC: G02F1/1337
CPC classification number: G02F1/133788 , G02F1/133719 , G02F1/133723 , G02F2001/13712
Abstract: A liquid crystal display device including an alignment film which has been optically aligned is configured that the liquid crystal has negative dielectric anisotropy, an absolute value of which is equal to or smaller than 5. The alignment film is subjected to an optical alignment process to exhibit the optical alignment property, and includes a first film located at a side in contact with the liquid crystal, and a second film below the first film, which is not optically aligned to have no alignment property. The alignment film is formed by applying a mixture of a first material for forming the first film and a second material for forming the second film to the substrate. The first material for the alignment film accounts for 10 wt. % or more and less than 40 wt. % of a total weight of the first and the second materials.
Abstract translation: 具有光学取向的取向膜的液晶显示装置构成为，液晶具有负的介电各向异性，其绝对值在5以下。对取向膜进行光取向处理， 光学取向性，并且包括位于与液晶接触的一侧的第一膜和在第一膜下面的第二膜，其不被光学对准以不具有取向性。 通过将用于形成第一膜的第一材料和用于形成第二膜的第二材料的混合物施加到基板上来形成取向膜。 用于取向膜的第一种材料占10wt。 ％以上且小于40重量％ 第一和第二材料的总重量的百分比。
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公开(公告)号：US20160033825A1
公开(公告)日：2016-02-04
申请号：US14879345
申请日：2015-10-09
Inventor： Chikae MATSUI , Noboru Kunimatsu , Hidehiro SONODA
IPC: G02F1/1337 , C09K19/56 , G02F1/1343
CPC classification number: G02F1/133723 , B32B2457/202 , C09K19/56 , G02F1/133788 , G02F1/134363 , G02F1/13439 , G02F2001/133397 , Y10T428/10 , Y10T428/1018 , Y10T428/1023 , Y10T428/105
Abstract: An alignment film is given a 2-layer structure comprising a photoalignment film that is photoalignable and a low-resistivity alignment film whose resistivity is smaller than that of the photoalignment film. The photoalignment film is formed by a polyimide whose precursor is polyamide acid alkyl ester, the number molecular weight of the photoalignment film is large, and the stability of alignment of the photoalignment film by photoalignment is excellent. The low-resistivity alignment film is formed by a polyimide whose precursor is polyamide acid, the number molecular weight of the low-resistivity alignment film is small, and the resistivity of the low-resistivity alignment film is small. The 2-layer structure alignment film can be maintaining an excellent photoalignment characteristic, so DC afterimages can be controlled.
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公开(公告)号：US20150370102A1
公开(公告)日：2015-12-24
申请号：US14840604
申请日：2015-08-31
Applicant: Japan Display Inc.
Inventor： Noboru KUNIMATSU , Masaki MATSUMORI , Hidehiro SONODA , Yasushi TOMIOKA , Toshiki KANEKO
IPC: G02F1/1337 , G02F1/1339 , G02F1/1333 , G02F1/1368 , G02F1/1362
CPC classification number: G02F1/1337 , G02F1/1333 , G02F1/133345 , G02F1/133723 , G02F1/13378 , G02F1/133788 , G02F1/1339 , G02F1/13394 , G02F1/136286 , G02F1/1368
Abstract: The present invention prevents the shaving of an alignment film caused by a columnar spacer in a liquid crystal display device of an IPS method using photo-alignment. A plinth higher than a pixel electrode is formed at a part where a columnar spacer formed over a counter substrate touches a TFT substrate. When an alignment film of a double-layered structure is applied over the pixel electrode and the plinth, the thickness of the alignment film over the plinth reduces by a leveling effect. When photo-alignment is applied in the state, a photodegraded upper alignment film over the plinth disappears and a lower alignment film having a high mechanical strength remains. As a result, it is possible to prevent the shaving of the alignment film.
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