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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
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：US11156875B2
公开(公告)日：2021-10-26
申请号：US16704538
申请日：2019-12-05
Inventor： Noboru Kunimatsu , Chikae Matsui , Hidehiro Sonoda , Yuko Matsumoto , Shoichi Uchino , Masaki Matsumori , Yasushi Tomioka
IPC: G02F1/1337 , G02F1/1343 , G02F1/1368 , H01L27/12 , C09K19/56
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：US11150523B2
公开(公告)日：2021-10-19
申请号：US16953997
申请日：2020-11-20
Applicant: Japan Display Inc.
Inventor： Yasushi Tomioka , Yosuke Hyodo , Hidehiro Sonoda , Noboru Kunimatsu
IPC: G02F1/136 , G02F1/1343 , G02F1/1362 , G02F1/1333 , G02F1/1335 , G02F1/1368 , H01L27/12 , G02F1/1337
Abstract: 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
Applicant: Japan Display Inc.
Inventor： Hidehiro Sonoda , Takenori Hirota , Yasushi Tomioka , Noboru Kunimatsu
IPC: C08G73/10 , G02F1/1337 , C09D179/08
Abstract: 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：US10690971B2
公开(公告)日：2020-06-23
申请号：US16655653
申请日：2019-10-17
Inventor： Hidehiro Sonoda , Chikae Matsui , Noboru Kunimatsu
IPC: G02F1/1339 , G02F1/1362 , G02F1/1333 , G02F1/1337 , G02F1/1343 , G02F1/1368
Abstract: A liquid crystal display device includes a TFT substrate and a counter substrate and a liquid crystal layer sandwiched therebetween. A scanning line, a video signal line, a thin film transistor connected to the scanning line and the video signal line, a pixel electrode connected to the thin film transistor, and a counter electrode are formed on the TFT substrate, and a columnar spacer formed on the counter substrate. The pixel and counter electrodes are transparent, and the liquid crystal layer is controlled by an electric field generated between the pixel and counter electrodes. The counter electrode contacts with a metal line having a first part which is extended in parallel with the scanning line and a second part which is extended in parallel with the video signal line, a width of the first part of the metal line being narrower than a width of the scanning line.
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Patent Agency Ranking
公开(公告)号：US10539833B2
公开(公告)日：2020-01-21
申请号：US16239932
申请日：2019-01-04
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：US10481437B1
公开(公告)日：2019-11-19
申请号：US16511105
申请日：2019-07-15
Inventor： Hidehiro Sonoda , Chikae Matsui , Noboru Kunimatsu
IPC: G02F1/1337 , G02F1/1339 , G02F1/1362 , G02F1/1335 , G02F1/1343 , G02F1/1368 , G02F1/1333
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 aver 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：US10268081B2
公开(公告)日：2019-04-23
申请号：US14246787
申请日：2014-04-07
Inventor： Shoichi Uchino , Noboru Kunimatsu , Hidehiro Sonoda , Chikae Matsui , Yuko Matsumoto , Tomio Yaguchi , Toshiki Kaneko , Jun Tanaka
IPC: G02F1/1337 , G02F1/13 , G02F1/1333
Abstract: Disclosed is a manufacturing method of a liquid crystal display device which is a manufacturing method of a liquid crystal display device including a liquid crystal alignment film to which an alignment regulating force is imparted by a photo-alignment treatment, including: a film forming step of forming a film containing a polymer whose main chain is cleaved by irradiation with light; a photo-alignment step of imparting an alignment regulating force to the film formed in the film forming step by irradiation of the film with light in an atmosphere of a temperature lower than 100° C.; and a removing step of removing a low-molecular weight component generated by cleaving the main chain of the polymer through the light irradiation after the light irradiation. Also disclosed is a liquid crystal display device manufactured by the manufacturing method.
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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
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
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：US20180180947A1
公开(公告)日：2018-06-28
申请号：US15893803
申请日：2018-02-12
Applicant: Japan Display Inc.
Inventor： Yasuo IMANISHI , Yosuke Hyodo , Chikae Matsui , Hidehiro Sonoda , Noboru Kunimatsu
IPC: G02F1/1337 , G02F1/1343 , C08G73/10
CPC classification number: G02F1/133788 , B32B2457/202 , C08G73/10 , C08G73/1046 , C08G73/105 , C08G73/1078 , G02F1/133723 , G02F1/13378 , G02F1/134363 , Y10T428/1005 , Y10T428/1018 , Y10T428/1023
Abstract: The present invention provides a liquid crystal display device in which even in the case of using a photo-alignment technique, excellent afterimage characteristics can be stably obtained. Provided is a liquid crystal display device including a TFT substrate having an alignment film, an opposed substrate which is arranged to face the TFT substrate and on which an alignment film is formed, and a liquid crystal layer sandwiched between the alignment films, wherein the alignment films are materials that can provide a liquid crystal alignment restraining force by irradiating polarized light, and the ratio of oxygen atoms on the surface of the alignment film is higher than that in the alignment film.
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