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公开(公告)号：US11852923B2
公开(公告)日：2023-12-26
申请号：US17685441
申请日：2022-03-03
申请人： Japan Display Inc.
IPC分类号： G02F1/1339 , G02F1/1333
CPC分类号： G02F1/1339 , G02F1/133345 , G02F1/133388
摘要： 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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公开(公告)号：US20230236463A1
公开(公告)日：2023-07-27
申请号：US18127035
申请日：2023-03-28
申请人： Japan Display Inc.
IPC分类号： G02F1/1362 , G02F1/1337 , G02F1/1333 , G02F1/1335 , G02F1/1368
CPC分类号： G02F1/136227 , G02F1/1337 , G02F1/1368 , G02F1/133345 , G02F1/133512 , G02F1/133707 , 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：US11300835B2
公开(公告)日：2022-04-12
申请号：US16937962
申请日：2020-07-24
申请人： Japan Display Inc.
IPC分类号： G02F1/1339 , G02F1/1333
摘要： 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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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：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：US10761380B2
公开(公告)日：2020-09-01
申请号：US16373832
申请日：2019-04-03
申请人： Japan Display Inc.
IPC分类号： G02F1/1339 , G02F1/1333
摘要： 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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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：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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