公开(公告)号：US20220299825A1

公开(公告)日：2022-09-22

申请号：US17655085

申请日：2022-03-16

Applicant: Japan Display Inc.

Inventor： Junji KOBASHI ,  Shinichiro OKA ,  Yasushi TOMIOKA ,  Koichi IGETA

IPC: G02F1/1337

Abstract: According to one embodiment, a liquid crystal element includes a transparent substrate including a first main surface, a plurality of structures disposed on the first main surface and arranged along one direction, an alignment film disposed on a surface of each of the structures and a liquid crystal layer containing a cholesteric liquid crystal and in contact with the alignment film, and the helical axis of the cholesteric liquid crystal is inclined with respect to the first main surface, each of the plurality of structures includes a first surface inclined with respect to the first main surface, in the plurality of structures, the first surfaces are parallel to each other, and the alignment film is interposed between the first surface and the liquid crystal layer.

公开(公告)号：US20220146889A1

公开(公告)日：2022-05-12

申请号：US17515903

申请日：2021-11-01

Applicant: Japan Display Inc.

Inventor： Junji KOBASHI ,  Shinichiro OKA ,  Yasushi TOMIOKA ,  Koichi IGETA

IPC: G02F1/1337 ,  G02F1/137

Abstract: According to one embodiment, a liquid crystal optical element includes a substrate having a first surface, a plurality of structures disposed on the first surface and arranged at a predetermined pitch, and a liquid crystal layer surrounding each of the structures and interposed between the structures adjacent to each other. The liquid crystal layer has a larger thickness than the structure. The liquid crystal layer has liquid crystal molecules arranged along the structure, and is cured in a state in which an alignment direction of the liquid crystal molecules is fixed.

公开(公告)号：US20190171073A1

公开(公告)日：2019-06-06

申请号：US16273586

申请日：2019-02-12

Applicant: Japan Display Inc.

Inventor： Yasushi TOMIOKA ,  Yosuke HYODO ,  Hidehiro SONODA ,  Noboru KUNIMATSU

IPC: G02F1/1343 ,  H01L27/12 ,  G02F1/1337 ,  G02F1/1335 ,  G02F1/1362 ,  G02F1/1368 ,  G02F1/1333

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：US20180079962A1

公开(公告)日：2018-03-22

申请号：US15826904

申请日：2017-11-30

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

Inventor： Masaki MATSUMORI ,  Yasushi TOMIOKA ,  Noboru KUNIMATSU

IPC: C09K19/56 ,  G02F1/1337 ,  C08L33/24 ,  C08L77/06 ,  G02F1/137 ,  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.

公开(公告)号：US20180046047A1

公开(公告)日：2018-02-15

申请号：US15784405

申请日：2017-10-16

Applicant: Japan Display Inc.

Inventor： Yasushi TOMIOKA ,  Toshimasa ISHIGAKI ,  Hidehiro Sonoda ,  Sumito UETA

IPC: G02F1/1362

CPC classification number: G02F1/136227 ,  G02F1/133345 ,  G02F1/133512 ,  G02F1/1337 ,  G02F1/133707 ,  G02F1/1368 ,  G02F2001/133357 ,  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：US20180022874A1

公开(公告)日：2018-01-25

申请号：US15647322

申请日：2017-07-12

Applicant: Japan Display Inc.

Inventor： Hidehiro SONODA ,  Takenori HIROTA ,  Yasushi TOMIOKA ,  Noboru KUNIMATSU

IPC: C08G73/10 ,  G02F1/1337

CPC classification number: C08G73/1067 ,  C08G73/1014 ,  C08G73/1071 ,  C08G73/1078 ,  C09D179/08 ,  G02F1/133711 ,  G02F1/133723 ,  G02F1/133788 ,  G02F2001/133354 ,  G02F2001/133397 ,  C08L79/08

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：US20170371195A1

公开(公告)日：2017-12-28

申请号：US15631300

申请日：2017-06-23

Applicant: Japan Display Inc.

Inventor： Yasushi TOMIOKA ,  Hajime YAMAGUCHI

IPC: G02F1/1333 ,  H01L51/52 ,  G02F1/1362 ,  H01L51/50

CPC classification number: G02F1/133305 ,  G02F1/13452 ,  G02F1/136227 ,  G02F1/136286 ,  H01L27/3276 ,  H01L51/5012 ,  H01L51/5234 ,  H01L2251/5338

Abstract: According to one embodiment, a display device includes a first substrate and an external circuit, the first substrate including a first area, a second area, and wirings, the first area including a display area in which pixels are arranged the external circuit being mounted on the second area. The wirings are electrically connected to the external circuit, provided in the first area and the second area, and arranged in the first direction. At least one of the wirings is inclined with respect to a second direction orthogonal to the first direction in a first portion of the second area. The first substrate is bent in the first portion.

公开(公告)号：US20170023814A1

公开(公告)日：2017-01-26

申请号：US15284864

申请日：2016-10-04

Applicant: Japan Display Inc.

Inventor： Noboru KUNIMATSU ,  Masaki MATSUMORI ,  Hidehiro SONODA ,  Yasushi TOMIOKA ,  Toshiki KANEKO

IPC: G02F1/1337 ,  G02F1/1339 ,  G02F1/1368

CPC classification number: G02F1/1337 ,  G02F1/1333 ,  G02F1/133345 ,  G02F1/133723 ,  G02F1/13378 ,  G02F1/133788 ,  G02F1/1339 ,  G02F1/13394 ,  G02F1/136286 ,  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.

Abstract translation: 本发明防止了使用光取向的IPS方法的液晶显示装置中的柱状间隔物引起的取向膜的刮削。 在对置基板上形成的柱状间隔件与TFT基板接触的部分，形成比像素电极高的底座。 当在像素电极和底座上施加双层结构的取向膜时，底座上的取向膜的厚度减小了平整效应。 当在该状态下进行光对准时，在底座上的光降解的上取向膜消失，并且残留有机械强度较高的下取向膜。 结果，可以防止取向膜的刮削。

公开(公告)号：US20150109569A1

公开(公告)日：2015-04-23

申请号：US14519515

申请日：2014-10-21

Applicant: Japan Display Inc.

Inventor： Noboru KUNIMATSU ,  Yasushi TOMIOKA ,  Toshiyuki HIGANO ,  Emi HIGANO ,  Midori TSUKANE ,  Hirofumi WAKEMOTO ,  Kazuhiro NISHIYAMA

IPC: G02F1/1339 ,  G02F1/1337

CPC classification number: G02F1/1339 ,  G02F1/133788

Abstract: An object of the present invention is to realize a liquid crystal display device having a photo-aligned alignment film in which the alignment film is overlapped with a seal material to downsize a frame area, and the reliability of a seal portion can be secured. A first alignment film and a second alignment film are overlapped with a seal material, the first alignment film and the second alignment film are made of material containing 0.5 wt % or larger and 2 wt % or smaller of an amine-system silane coupling agent, and the shrinkage ratio and the storage elastic modulus of the seal material evaluated using the modulus of volume change by a specific gravity cup method are 5.1% or smaller and 9.2 Pa or smaller, respectively. Accordingly, a frame area can be downsized, and the reliability of a seal portion can be maintained.

Abstract translation: 本发明的目的是实现一种具有光取向膜的液晶显示装置，其中取向膜与密封材料重叠以减小框架区域的尺寸，并且可以确保密封部分的可靠性。 第一取向膜和第二取向膜与密封材料重叠，第一取向膜和第二取向膜由含有0.5重量％以上且2体积％以下的胺系硅烷偶联剂的材料构成， 并且使用体积变化率通过比重杯法评价的密封材料的收缩率和储能弹性模量分别为5.1％以下且9.2Pa以下。 因此，可以缩小框架面积，并且可以保持密封部的可靠性。

公开(公告)号：US20250072243A1

公开(公告)日：2025-02-27

申请号：US18944458

申请日：2024-11-12

Applicant: Japan Display Inc.

Inventor： Yasushi TOMIOKA

IPC: H10K59/131 ,  H10K59/122 ,  H10K59/124

Abstract: According to one embodiment, a display device including, a substrate including a first area including a display area, a second area including a mount area, and a third area located between the first area and the second area, a first inorganic insulating layer provided on the substrate in the first area and the second area, a line provided on the first inorganic insulating layer and extending across the first area, the second area, and the third area, and, a second inorganic insulating layer provided on the line, the second inorganic insulating layer extending to an area overlaid on at least the first inorganic insulating layer.