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公开(公告)号：US11914254B2
公开(公告)日：2024-02-27
申请号：US18127035
申请日：2023-03-28
申请人： Japan Display Inc.
IPC分类号： G02F1/1362 , G02F1/1333 , G02F1/1335 , G02F1/1337 , G02F1/1368
CPC分类号： G02F1/136227 , G02F1/133345 , G02F1/133512 , G02F1/1337 , G02F1/133707 , G02F1/1368 , G02F1/133357 , G02F2201/121 , G02F2201/123
摘要： 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：US11474403B2
公开(公告)日：2022-10-18
申请号：US17499952
申请日：2021-10-13
申请人： Japan Display Inc.
IPC分类号： G02F1/13 , G02F1/1362 , G02F1/1337 , G02F1/1333 , G02F1/1335 , G02F1/1368
摘要： 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：US20220315703A1
公开(公告)日：2022-10-06
申请号：US17842922
申请日：2022-06-17
申请人： Japan Display Inc.
IPC分类号： C08G73/10 , G02F1/1337 , C09D179/08
摘要： According to one embodiment, a varnish for a photo alignment film includes an imidization promotor and a first polyamic acid-based compound in an organic solvent. The first polyamic acid-based compound is a polyamic acid or a polyamic acid ester. The imidization promotor has skeleton containing no primary amino group and no secondary amino group. The first polyamic acid-based compound has terminal skeletons containing no primary amino group.
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公开(公告)号：US11275274B2
公开(公告)日：2022-03-15
申请号：US17077412
申请日：2020-10-22
申请人： Japan Display Inc.
IPC分类号： G02F1/1337 , G02F1/1339 , G02F1/1333 , G02F1/1362 , G02F1/1368 , G02F1/1343
摘要： 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：US11156875B2
公开(公告)日：2021-10-26
申请号：US16704538
申请日：2019-12-05
发明人： Noboru Kunimatsu , Chikae Matsui , Hidehiro Sonoda , Yuko Matsumoto , Shoichi Uchino , Masaki Matsumori , Yasushi Tomioka
IPC分类号： G02F1/1337 , G02F1/1343 , G02F1/1368 , H01L27/12 , C09K19/56
摘要： 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：US11150523B2
公开(公告)日：2021-10-19
申请号：US16953997
申请日：2020-11-20
申请人： Japan Display Inc.
IPC分类号： G02F1/136 , G02F1/1343 , G02F1/1362 , G02F1/1333 , G02F1/1335 , G02F1/1368 , H01L27/12 , G02F1/1337
摘要： In a liquid crystal display device, a common electrode is formed on an organic passivation film, an interlayer insulating film is formed on the common electrode, a pixel electrode with a slit is formed on the interlayer insulating film, and a through hole is formed in the organic passivation film and the interlayer insulating film, so that the pixel electrode is connected to a source electrode of a TFT through the through hole. Further, the taper angle around the upper base of the through hole is smaller than the taper angle around the lower base. Thus, the alignment film material can easily flow into the through hole when the diameter of the through hole is reduced to connect the pixel and source electrodes, preventing display defects such as uneven brightness due to the absence of the alignment film or due to the alignment film irregularity around the through hole.
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公开(公告)号：US20210155755A1
公开(公告)日：2021-05-27
申请号：US17164973
申请日：2021-02-02
申请人： Japan Display Inc.
IPC分类号： C08G73/10 , G02F1/1337 , C09D179/08
摘要： According to one embodiment, a varnish for a photo alignment film includes an imidization promotor and a first polyamic acid-based compound in an organic solvent. The first polyamic acid-based compound is a polyamic acid or a polyamic acid ester. The imidization promotor has skeleton containing no primary amino group and no secondary amino group. The first polyamic acid-based compound has terminal skeletons containing no primary amino group.
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公开(公告)号：US10539833B2
公开(公告)日：2020-01-21
申请号：US16239932
申请日：2019-01-04
申请人： Japan Display Inc.
IPC分类号： G02F1/1337 , G02F1/1339 , G02F1/1333 , G02F1/1362 , G02F1/1368 , G02F1/1343
摘要： 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：US10247988B2
公开(公告)日：2019-04-02
申请号：US15636781
申请日：2017-06-29
申请人： Japan Display Inc.
发明人： Tatsuya Ide , Daisuke Sonoda , Yasushi Tomioka
IPC分类号： G02F1/13 , G02F1/1343 , G02F1/1335 , G02F1/136 , G02F1/1333 , G02F1/1345 , H01L51/00 , G02F1/1362
摘要： According to one embodiment, a display device includes an insulating substrate including a first surface, and a second surface opposite to the first surface, a circuit board mounted on the first surface, a supporting member adhered to the insulating substrate on the second surface, and an antistatic layer located between the insulating substrate and the supporting member.
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公开(公告)号：US10197857B2
公开(公告)日：2019-02-05
申请号：US15826366
申请日：2017-11-29
申请人： Japan Display Inc.
IPC分类号： G02F1/1337 , G02F1/1339 , G02F1/1333 , G02F1/1362 , G02F1/1368
摘要： 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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