-
公开(公告)号：US11906857B2
公开(公告)日：2024-02-20
申请号：US18140006
申请日：2023-04-27
Applicant: Japan Display Inc.
Inventor： Yasushi Tomioka , Yosuke Hyodo , Hidehiro Sonoda , Noboru Kunimatsu
IPC: G02F1/1343 , G02F1/1368 , G02F1/1362 , G02F1/1333 , G02F1/1335 , H01L27/12 , G02F1/1337
CPC classification number: G02F1/134363 , G02F1/1368 , G02F1/133345 , G02F1/133512 , G02F1/133514 , G02F1/133788 , G02F1/136227 , H01L27/1218 , G02F2202/02
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.
-
公开(公告)号：US11650467B2
公开(公告)日：2023-05-16
申请号：US17945789
申请日：2022-09-15
Applicant: Japan Display Inc.
Inventor： Yasushi Tomioka , Toshimasa Ishigaki , Hidehiro Sonoda , Sumito Ueta
IPC: G02F1/136 , G02F1/1362 , G02F1/1337 , G02F1/1333 , G02F1/1335 , G02F1/1368
CPC classification number: G02F1/136227 , G02F1/1337 , G02F1/1368 , G02F1/133345 , G02F1/133512 , G02F1/133707 , G02F1/133357 , G02F2201/121 , G02F2201/123
Abstract: To prevent a phenomenon that an alignment film material is difficult to flow into the through-hole where a diameter of a through-hole for connecting between a pixel electrode and a source electrode is reduced.
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.-
公开(公告)号：US11513396B2
公开(公告)日：2022-11-29
申请号：US17078628
申请日：2020-10-23
Inventor： Chikae Matsui , Noboru Kunimatsu , Hidehiro Sonoda
IPC: G02F1/1333 , G02F1/1337 , C09K19/56 , G02F1/1343
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.
-
公开(公告)号：US11480833B2
公开(公告)日：2022-10-25
申请号：US17475403
申请日：2021-09-15
Applicant: Japan Display Inc.
Inventor： Yasushi Tomioka , Yosuke Hyodo , Hidehiro Sonoda , Noboru Kunimatsu
IPC: G02F1/13 , 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.
-
公开(公告)号：US11384204B2
公开(公告)日：2022-07-12
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 , G02F1/1333
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.
-
Patent Agency Ranking
公开(公告)号：US11175546B2
公开(公告)日：2021-11-16
申请号：US17101031
申请日：2020-11-23
Applicant: Japan Display Inc.
Inventor： Yasushi Tomioka , Toshimasa Ishigaki , Hidehiro Sonoda , Sumito Ueta
IPC: G02F1/136 , G02F1/1362 , G02F1/1337 , G02F1/1333 , G02F1/1335 , G02F1/1368
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.
-
公开(公告)号：US20210208442A1
公开(公告)日：2021-07-08
申请号：US17208554
申请日：2021-03-22
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.
-
公开(公告)号：US10852589B2
公开(公告)日：2020-12-01
申请号：US16714083
申请日：2019-12-13
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.
-
公开(公告)号：US20190179203A1
公开(公告)日：2019-06-13
申请号：US16276796
申请日：2019-02-15
Inventor： Shoichi Uchino , Noboru Kunimatsu , Hidehiro Sonoda , Chikae Matsui , Yuko Matsumoto , Tomio Yaguchi , Toshiki Kaneko , Jun Tanaka
IPC: G02F1/1337
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.
-
公开(公告)号：US10185183B2
公开(公告)日：2019-01-22
申请号：US15625060
申请日：2017-06-16
Inventor： Hidehiro Sonoda , Chikae Matsui , Noboru Kunimatsu
IPC: G02F1/1339 , G02F1/1362 , G02F1/1333 , G02F1/1337 , G02F1/1368 , G02F1/1343
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.
-
-
-
-
-
-
-
-
-
Search Results
119
records
(took 0.022 seconds)
