公开(公告)号：US09250491B2

公开(公告)日：2016-02-02

申请号：US14527841

申请日：2014-10-30

Applicant: Japan Display Inc.

Inventor： Yasushi Tomioka ,  Yosuke Hyodo ,  Hidehiro Sonoda ,  Noboru Kunimatsu

IPC: G02F1/1362

CPC classification number: G02F1/134363 ,  G02F1/133345 ,  G02F1/133512 ,  G02F1/133514 ,  G02F1/133788 ,  G02F1/136227 ,  G02F1/1368 ,  G02F2202/02 ,  H01L27/1218

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：US09250479B2

公开(公告)日：2016-02-02

申请号：US13719285

申请日：2012-12-19

Applicant: Japan Display Inc.

Inventor： Yasushi Tomioka ,  Noboru Kunimatsu ,  Yosuke Hyodo ,  Toshiki Kaneko ,  Yuko Matsumoto

IPC: G02F1/1339

CPC classification number: G02F1/13394 ,  G02F1/1339 ,  G02F1/136286 ,  G02F1/1368 ,  G02F2001/13396 ,  G02F2001/13398

Abstract: A liquid crystal display device includes: a TFT substrate having gate lines and data lines arranged thereon, the gate lines extending in a first direction and arranged in a second direction, the data lines extending in the second direction and arranged in the first direction; a counter substrate having a black matrix and a color filter; and liquid crystals put between the TFT substrate and the counter substrate. Columnar spacers are formed on the counter substrate. Pedestals are formed on portions of the TFT substrate, the portions corresponding to the columnar spacers. A convex portion and a concave portion are present at the top end of the columnar spacer. The pedestal is formed corresponding to the concave portion. The concave portion is opened at the ends thereof and connected to the lateral side of the columnar spacer.

Abstract translation: 液晶显示装置包括：TFT基板，其上配置有栅线和数据线，栅极线沿第一方向延伸并沿第二方向布置，数据线沿第二方向延伸并沿第一方向布置; 具有黑矩阵和滤色器的对置基板; 并将液晶放置在TFT基板和对置基板之间。 在对置基板上形成柱状间隔物。 基台形成在TFT基板的部分上，对应于柱状间隔件。 在柱状间隔物的顶端存在凸部和凹部。 基座与凹部对应地形成。 凹部在其端部开口并与柱状间隔件的横向侧连接。

公开(公告)号：US09028926B2

公开(公告)日：2015-05-12

申请号：US14061284

申请日：2013-10-23

Applicant: Japan Display, Inc. ,  Panasonic Liquid Crystal Display Co., Ltd.

Inventor： Masaki Matsumori ,  Yasushi Tomioka ,  Noboru Kunimatsu

IPC: G02F1/1337 ,  G02F1/1343

CPC classification number: C09K19/56 ,  B32B2457/202 ,  C08L33/24 ,  C08L77/06 ,  G02F1/133723 ,  G02F1/133788 ,  G02F1/134363 ,  G02F1/137 ,  G02F2001/133749 ,  G02F2001/13706 ,  Y10T428/1005 ,  Y10T428/1018 ,  Y10T428/1023

Abstract: An IPS type liquid crystal display device superior in mass productivity and improved in image quality with a higher contrast ratio by decreasing the occurrence of defective display due to the disorder of the initial liquid crystal alignment by the liquid orientation control film and realizing stable alignment of liquid crystals comprises: a pair of substrates, at least one which is transparent; a liquid crystal layer disposed between the pair of substrates; a group of electrodes formed on at least one of the pair of substrates to apply an electric field to the liquid crystal layer; plural active elements connected to the group of electrodes; and an orientation control film disposed on at least one of the pair of substrates, wherein said orientation control film is made of a photosensitive polyimide and a polyamide acid ester and is given orientation control ability by being irradiated with substantially linearly polarized light.

Abstract translation: 一种IPS型液晶显示装置，其通过减少由于液体取向控制膜的初始液晶取向无序而导致的不良显示的发生，并且实现液体的稳定取向 晶体包括：一对基板，至少一个基板是透明的; 设置在所述一对基板之间的液晶层; 形成在所述一对基板中的至少一个基板上的一组电极，以向所述液晶层施加电场; 连接到该组电极的多个有源元件; 以及设置在所述一对基板中的至少一个基板上的取向控制膜，其中所述取向控制膜由感光性聚酰亚胺和聚酰胺酸酯构成，并且通过用基本上线偏振光照射而获得取向控制能力。

公开(公告)号：US11914254B2

公开(公告)日：2024-02-27

申请号：US18127035

申请日：2023-03-28

Applicant: Japan Display Inc.

Inventor： Yasushi Tomioka ,  Toshimasa Ishigaki ,  Hidehiro Sonoda ,  Sumito Ueta

IPC: G02F1/1362 ,  G02F1/1333 ,  G02F1/1335 ,  G02F1/1337 ,  G02F1/1368

CPC classification number: G02F1/136227 ,  G02F1/133345 ,  G02F1/133512 ,  G02F1/1337 ,  G02F1/133707 ,  G02F1/1368 ,  G02F1/133357 ,  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.

公开(公告)号：US11474403B2

公开(公告)日：2022-10-18

申请号：US17499952

申请日：2021-10-13

Applicant: Japan Display Inc.

Inventor： Yasushi Tomioka ,  Toshimasa Ishigaki ,  Hidehiro Sonoda ,  Sumito Ueta

IPC: G02F1/13 ,  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：US20220315703A1

公开(公告)日：2022-10-06

申请号：US17842922

申请日：2022-06-17

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.

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.

公开(公告)号：US11156875B2

公开(公告)日：2021-10-26

申请号：US16704538

申请日：2019-12-05

Applicant: Japan Display Inc. ,  Panasonic Liquid Crystal Display Co., Ltd.

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.

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.

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.