公开(公告)号：US11976970B2

公开(公告)日：2024-05-07

申请号：US17656281

申请日：2022-03-24

Applicant: Japan Display Inc.

Inventor： Toshiyuki Higano ,  Yasushi Tomioka ,  Kazuhiro Nishiyama

IPC: G01J3/02 ,  G01J3/26 ,  G06V40/13

CPC classification number: G01J3/021 ,  G01J3/0208 ,  G01J3/26 ,  G06V40/1318

Abstract: An optical sensor includes at least one interferometer having a pair of semi-transparent mirrors spaced apart and oppositely arranged, and at least one position of the pair of semi-transparent mirrors can be displaced, at least one collimating element overlapping the at least one interferometer, and at least one photoelectric conversion element having sensitivity in the visible and near infrared light bands and receiving light passing through the interferometer and the collimating element.

公开(公告)号：US11604384B2

公开(公告)日：2023-03-14

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：US11600102B2

公开(公告)日：2023-03-07

申请号：US17517109

申请日：2021-11-02

Applicant: Japan Display Inc.

Inventor： Yasushi Tomioka ,  Kazuki Matsunaga ,  Toshiyuki Higano ,  Kazuhiro Nishiyama

IPC: G06V40/13 ,  H01L27/146

Abstract: According to an aspect, a detection device includes a plurality of light-receiving elements configured to receive light, and a light guide portion one surface of which faces the light-receiving elements. The light guide portion includes a plurality of light guide paths provided throughout from the one surface to the other surface of the light guide portion, and a light-absorbing portion having higher absorbance of the light than that of the light guide paths. When viewed from a direction in which the light-receiving elements and the light guide portion are stacked, more than one of the light guide paths overlap one of the light-receiving elements.

公开(公告)号：US10534225B2

公开(公告)日：2020-01-14

申请号：US15696357

申请日：2017-09-06

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: C09K19/00 ,  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：US10514563B2

公开(公告)日：2019-12-24

申请号：US16374802

申请日：2019-04-04

Applicant: Japan Display Inc.

Inventor： Yasushi Tomioka ,  Hajime Yamaguchi

IPC: G06F3/041 ,  G02F1/1333 ,  G02F1/1362 ,  H01L51/52 ,  G02F1/1345 ,  H01L27/32 ,  H01L51/50

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：US10302980B2

公开(公告)日：2019-05-28

申请号：US15631300

申请日：2017-06-23

Applicant: Japan Display Inc.

Inventor： Yasushi Tomioka ,  Hajime Yamaguchi

IPC: G06F3/041 ,  G02F1/1333 ,  G02F1/1362 ,  H01L51/52 ,  G02F1/1345 ,  H01L27/32 ,  H01L51/50

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：US10241372B2

公开(公告)日：2019-03-26

申请号：US16174438

申请日：2018-10-30

Applicant: Japan Display Inc.

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

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

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：US09841636B2

公开(公告)日：2017-12-12

申请号：US14249454

申请日：2014-04-10

Applicant: Japan Display Inc.

Inventor： Yasushi Tomioka ,  Osamu Itou ,  Toshimasa Ishigaki ,  Hidehiro Sonoda ,  Yosuke Hyodo

IPC: G02F1/1339 ,  G02F1/1337

CPC classification number: G02F1/13394 ,  G02F1/133788 ,  G02F2001/13398

Abstract: A high-definition and high-contrast liquid crystal display device having a high aperture ratio without light leakage around a columnar spacer is provided. The liquid crystal display device of a horizontal electric field type includes a TFT substrate with a pixel electrode and a common electrode, a color filter substrate with a color filter, a columnar spacer interposed between the substrates, and a liquid crystal layer arranged between the substrates. A liquid crystal alignment film formed between the substrates is a photo-alignment film. The columnar spacer, formed on the color filter substrate or the TFT substrate, has a wall-like shape and an inclined surface extending in a direction parallel to or perpendicular to a direction in which the liquid crystal is initially aligned.

公开(公告)号：US09841633B2

公开(公告)日：2017-12-12

申请号：US14922377

申请日：2015-10-26

Applicant: Japan Display Inc.

Inventor： Noboru Kunimatsu ,  Yuko Matsumoto ,  Yasushi Tomioka ,  Masateru Morimoto ,  Atsuhiro Katayama

IPC: G02F1/1337 ,  G02F1/1339 ,  G02F1/13 ,  G02F1/1335 ,  G02F1/1341 ,  G02B5/20 ,  G02F1/1362 ,  G02F1/1368 ,  G02F1/139

CPC classification number: G02F1/133788 ,  G02B5/208 ,  G02F1/1303 ,  G02F1/133509 ,  G02F1/133512 ,  G02F1/133514 ,  G02F1/1337 ,  G02F1/133707 ,  G02F1/1339 ,  G02F1/1341 ,  G02F1/136209 ,  G02F1/1368 ,  G02F1/1393 ,  G02F2001/13398 ,  G02F2201/086 ,  G02F2203/055 ,  Y10T428/1005

Abstract: In the step of curing a resin for bonding a TFT substrate and a counter substrate each having an alignment film that has been optically aligned by using UV-light, damage to the alignment film due to the UV-light can be prevented without using a light shielding mask. A UV-light absorption layer is formed between each black matrix on the counter substrate. The TFT and counter substrates are sealed at their periphery by a resin that is cured by UV-light radiated from the counter substrate side. Since the absorption layer has a high absorbability to UV-light at a wavelength of 300 nm or less that degrades the alignment film, damage to the alignment film due to the UV-light for curing the resin can be prevented. Thus, provision of a light shielding mask for shielding the UV-light for the display region can be saved.

公开(公告)号：US09817288B2

公开(公告)日：2017-11-14

申请号：US15343329

申请日：2016-11-04

Applicant: Japan Display Inc.

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

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

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.