公开(公告)号：US11036088B2

公开(公告)日：2021-06-15

申请号：US16143796

申请日：2018-09-27

Applicant: Japan Display Inc.

Inventor： Hidehiro Sonoda ,  Masahiro Kosuge ,  Yasushi Tomioka ,  Takenori Hirota ,  Noboru Kunimatsu

IPC: G02F1/1337 ,  C09K19/56 ,  G02F1/1343 ,  C09K19/54

Abstract: According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate disposed to oppose the first substrate, a layer of liquid crystal located between the first substrate and the second substrate, and an alignment film disposed on the first substrate so as to be in contact with the layer of the liquid crystal. The liquid crystal has a refractive-index anisotropy Δn of 0.11 or more, the layer of the liquid crystal has a thickness d of 2.5 μm or less, and a product Δnd of the refractive-index anisotropy Δn and the thickness d is 0.20 or more but 0.31 or less. The transmissivity of light having a wavelength of 450 nm in the first substrate and the alignment film is 85% or more but 97% or less.

公开(公告)号：US10031382B2

公开(公告)日：2018-07-24

申请号：US15389941

申请日：2016-12-23

Applicant: Japan Display Inc.

Inventor： Daiichi Suzuki ,  Yoshifumi Saeki ,  Yukio Tanaka ,  Noboru Kunimatsu ,  Hidehiro Sonoda ,  Masahiro Kosuge

IPC: G02F1/1343 ,  G02F1/133 ,  G02F1/1337

Abstract: According to one embodiment, a liquid crystal display device includes a liquid crystal display panel which includes a pixel electrode, a liquid crystal layer and an alignment film, and a driver. The driver drives the pixel electrode at a drive frequency of 1 to 20 Hz. The alignment film has a resistivity of 5×1014 Ω·cm or more.

公开(公告)号：US09690131B2

公开(公告)日：2017-06-27

申请号：US14967868

申请日：2015-12-14

Applicant: Japan Display Inc.

Inventor： Osamu Itou ,  Kenji Nakao ,  Toshimasa Ishigaki ,  Masahiro Kosuge

IPC: G02F1/1335 ,  G02F1/1362

CPC classification number: G02F1/133502 ,  G02F1/136286

Abstract: The elution of a color filter to a liquid crystal layer is reduced. A liquid crystal display device includes an active device substrate, a liquid crystal layer provided on the active device substrate, and a counter substrate provided on the liquid crystal layer. The active device substrate includes an active device, a common electrode, a common interconnection electrically connected to the common electrode, a reflection reduction film provided on the common interconnection, a first insulating layer provided on the reflection reduction film, and a pixel electrode having a flat portion provided on the first insulating layer and a first projecting portion protruding downwardly. The first the projecting portion is electrically connected to the active device.

公开(公告)号：US11169405B2

公开(公告)日：2021-11-09

申请号：US15935353

申请日：2018-03-26

Applicant: Japan Display Inc.

Inventor： Masahiro Kosuge

IPC: G02F1/1333 ,  G02F1/1335 ,  G02F1/1343 ,  G02F1/1337 ,  G02F1/1345

Abstract: A display device includes a substrate having a display region and a peripheral region outside the display region; a liquid crystal layer; an insulating film between the liquid crystal layer and the substrate; an alignment film between the insulating film and the liquid crystal layer and having a front surface in contact with the liquid crystal layer; a pixel electrode having a front surface in contact with the alignment film in the display region; and an electrode having a front surface in contact with the alignment film in the peripheral region. Also, the electrode is supplied with an electric potential in the peripheral region. Each of the alignment film, the pixel electrode, and the electrode is formed on the insulating film. A distance from the substrate to the front surface of the electrode is longer than a distance from the substrate to the front surface of the pixel electrode.

公开(公告)号：US10908460B2

公开(公告)日：2021-02-02

申请号：US15938056

申请日：2018-03-28

Applicant: Japan Display Inc.

Inventor： Masahiro Kosuge

IPC: G02F1/1337

Abstract: According to one embodiment, a method of manufacturing an alignment film, includes forming an organic layer on a substrate, irradiating polarized ultraviolet rays onto the organic layer to impart an alignment controllability of liquid crystal molecules, oxidating the organic layer irradiated with the polarized ultraviolet rays, washing the oxidated organic layer and reducing the washed organic layer.

公开(公告)号：US09880435B2

公开(公告)日：2018-01-30

申请号：US15086740

申请日：2016-03-31

Applicant: Japan Display Inc.

Inventor： Masahiro Kosuge ,  Kenji Nakao ,  Osamu Itou

IPC: G02F1/1362

CPC classification number: G02F1/136209 ,  G02F1/136286 ,  G02F2001/136222

Abstract: A display device includes a first light shielding part provided between a filter film and a first electrode, and a second light shielding part provided on a second substrate. First and second filter films each have long sides that extend in a first direction in which a video signal line extends, and the first and the second filter films are arranged adjacent to each other in a second direction different from the first direction. The first light shielding part overlaps the video signal line in a plan view. The second light shielding part overlaps a metal electrode in the plan view.

公开(公告)号：US20170184929A1

公开(公告)日：2017-06-29

申请号：US15389941

申请日：2016-12-23

Applicant: Japan Display Inc.

Inventor： Daiichi SUZUKI ,  Yoshifumi Saeki ,  Yukio Tanaka ,  Noboru Kunimatsu ,  Hidehiro Sonoda ,  Masahiro Kosuge

IPC: G02F1/1343 ,  G02F1/133 ,  G02F1/1337

CPC classification number: G02F1/134363 ,  G02F1/13306 ,  G02F1/1337 ,  G02F2001/134372 ,  G02F2201/121 ,  G02F2201/123

Abstract: According to one embodiment, a liquid crystal display device includes a liquid crystal display panel which includes a pixel electrode, a liquid crystal layer and an alignment film, and a driver. The driver drives the pixel electrode at a drive frequency of 1 to 20 Hz. The alignment film has a resistivity of 5×1014 Ω·cm or more.

公开(公告)号：US10409124B2

公开(公告)日：2019-09-10

申请号：US15277220

申请日：2016-09-27

Applicant: Japan Display Inc.

Inventor： Osamu Itou ,  Daisuke Sonoda ,  Masahiro Kosuge

IPC: G02F1/1362 ,  G02F1/1335 ,  G02F1/1343 ,  G02F1/1337 ,  G02F1/1333

Abstract: According to one embodiment, a liquid crystal display device, includes a first substrate including a scanning signal line, a video signal line, a first electrode, a color filter, a common line in contact with the first electrode along the video signal line, an antireflection layer located on the common line, a transparent layer located on the antireflection layer, and a second electrode, a liquid crystal layer located on the first substrate, and a second substrate located on the liquid crystal layer, the transparent layer having a thickness of 10 nm or more and 40 nm or less.

公开(公告)号：US10186217B2

公开(公告)日：2019-01-22

申请号：US15620963

申请日：2017-06-13

Applicant: Japan Display Inc.

Inventor： Masahiro Kosuge ,  Yukio Tanaka

IPC: G02F1/1362 ,  G02F1/1337 ,  G02F1/1368 ,  G02F1/1343 ,  G02F7/00 ,  G09G3/36 ,  G09G5/42 ,  G09G3/34

Abstract: According to one embodiment, a display device includes a first substrate, a second substrate, a liquid crystal layer, a first alignment film, a pixel electrode, and a common electrode. The liquid crystal layer is disposed between the first substrate and the second substrate. The first alignment film is provided on the first substrate to be in contact with the liquid crystal layer. The pixel electrode is provided on the first substrate and covered with the first alignment film. The common electrode provided on the first substrate to form a lateral electric field. The liquid crystal layer is driven at a frequency of 40 Hz or less. A time constant of the liquid crystal layer is larger than a time constant of the first alignment film.

公开(公告)号：US10054832B2

公开(公告)日：2018-08-21

申请号：US14923915

申请日：2015-10-27

Applicant: Japan Display Inc.

Inventor： Osamu Itou ,  Kenji Nakao ,  Toshimasa Ishigaki ,  Masahiro Kosuge

IPC: G02F1/1362 ,  G02F1/1343

CPC classification number: G02F1/136227 ,  G02F1/134363 ,  G02F2001/134372 ,  G02F2001/136222

Abstract: Disclosed is a liquid crystal display device including an active element substrate having an active element; a first layer provided on the active element and having a first hole formed therein, the first layer being one of a first insulating layer and a color filter; a second layer provided on the first layer and having a second hole formed therein, the second layer being the other of the first insulating layer and the color filter; a common electrode provided on the second layer; a second insulating layer having a plate-like portion provided on the common electrode and a first contact portion protruded downward; and a pixel electrode having a second contact portion protruded downward. The first contact portion is provided inside the second hole, and the second contact portion is provided inside the first hole and inside the second hole and electrically connected to the active element.