公开(公告)号：US20190094593A1

公开(公告)日：2019-03-28

申请号：US16147386

申请日：2018-09-28

Applicant: SHARP KABUSHIKI KAISHA

Inventor： MASAHIRO HASEGAWA ,  KOJI MURATA ,  YUICHI KAWAHIRA ,  TAKAKO KOIDE ,  AKIRA SAKAI ,  KIYOSHI MINOURA

IPC: G02F1/13363 ,  F21V8/00 ,  G02F1/1335

Abstract: Provided is a liquid crystal module being excellent in durability and manufacturing cost and exhibiting reduced variations in peak luminance that are caused depending on an azimuth angle during black display when the polar angle is large. The liquid crystal module includes: a liquid crystal panel including a first polarizer, a first substrate, a liquid crystal layer, an in-cell retardation layer (λ/4 plate of nx>ny=nz), a second substrate, an out-cell retardation layer (λ/4 plate of nx>ny≥nz), and a second polarizer, from a back side toward an observation side; and a backlight. The backlight includes a first prism sheet including a first ridge line, and a second prism sheet provided on a back side from the first prism sheet and including a second ridge line orthogonal to the first ridge line. The first ridge line is parallel to an azimuth at which the liquid crystal panel has a maximized transmittance in an oblique direction during black display.

公开(公告)号：US20180348553A1

公开(公告)日：2018-12-06

申请号：US15780541

申请日：2016-11-30

Applicant: SHARP KABUSHIKI KAISHA

Inventor： TAKAKO KOIDE ,  KIYOSHI MINOURA ,  KOZO NAKAMURA ,  AKIRA SAKAI ,  MASAHIRO HASEGAWA

IPC: G02F1/1337 ,  G02F1/1335 ,  G02F1/139 ,  G02F1/13363 ,  G02F1/1343 ,  G02F1/1333

CPC classification number: G02F1/1333 ,  G02F1/1335 ,  G02F1/1337 ,  G02F1/1343 ,  G02F1/139

Abstract: A liquid crystal display device includes a transmissive region and a reflective region, and includes a backlight unit and a liquid crystal display panel including a first substrate, a first alignment film, a liquid crystal layer containing liquid crystal molecules having positive anisotropy of dielectric constant, a second alignment film, and a second substrate in the given order from closest to farthest from the backlight unit, the first substrate including a first electrode disposed in the transmissive region and the reflective region and a second electrode disposed in the transmissive region, the first substrate or the second substrate including a third electrode disposed in the reflective region, the first electrode including one or more first linear electrode portions in the transmissive region, with no voltage applied to the liquid crystal layer, the liquid crystal molecules in the transmissive region forming a given twist angle θ1, the liquid crystal molecules in the reflective region forming a given twist angle θ2, and an alignment azimuth of liquid crystal molecules adjacent to the first alignment film or the second alignment film in the reflective region being parallel to the alignment azimuth of liquid crystal molecules adjacent to the first alignment film in the transmissive region.

公开(公告)号：US20210349346A1

公开(公告)日：2021-11-11

申请号：US16870219

申请日：2020-05-08

Applicant: SHARP KABUSHIKI KAISHA

Inventor： NATHAN JAMES SMITH ,  ANDREW ACREMAN ,  ENRICO ANGIONI ,  MIHO YAMADA ,  AKIRA SAKAI

IPC: G02F1/1335 ,  G02B5/30

Abstract: A method of fabricating a reactive mesogen (RM) guest-host polarizer is disclosed. The method includes forming an RM guest-host polarizer material on a substrate that promotes a substantially uniform planar alignment configuration of the RM guest-host molecules, forming a temporary layer on the RM guest-host polarizer material to align RM guest-host molecules of the RM guest-host polarizer material in the substantially uniform planar alignment configuration, performing polymerization of the RM guest-host polarizer material, and removing the temporary layer from the RM guest-host polarizer. The temporary layer includes at least one of a temporary fluid layer, a temporary particulate layer, a temporary gaseous layer, a temporary vacuum layer, and a temporary alignment substrate layer.

公开(公告)号：US20210286213A1

公开(公告)日：2021-09-16

申请号：US17197631

申请日：2021-03-10

Applicant: SHARP KABUSHIKI KAISHA

Inventor： AKIRA SAKAI ,  MASAHIRO HASEGAWA ,  MIHO YAMADA ,  KOJI MURATA ,  KIYOSHI MINOURA

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

Abstract: A liquid crystal display panel includes a first substrate, a second substrate, a liquid crystal layer, a first polarizing plate, and a second polarizing plate. The first substrate includes a first dielectric substrate, first and second electrodes, provided over the first dielectric substrate and configured to generate a transverse electric field in the liquid crystal layer, at least either of which has a plurality of slits, and a first alignment film placed in contact with the liquid crystal layer. The first substrate further includes an inorganic insulating layer provided between the second electrode and the first alignment film. The difference between the refractive index of the inorganic insulating layer and the refractive index of the second electrode is smaller than or equal to 0.20. The thickness of the inorganic insulating layer is greater than or equal to 50% of the thickness of the second electrode and greater than or equal to 40 nm.

公开(公告)号：US20210132450A1

公开(公告)日：2021-05-06

申请号：US16630115

申请日：2018-07-06

Applicant: SHARP KABUSHIKI KAISHA

Inventor： AKIRA SAKAI ,  YUICHI KAWAHIRA ,  KOJI MURATA ,  MASAHIRO HASEGAWA ,  TAKAKO KOIDE ,  KOZO NAKAMURA ,  KIYOSHI MINOURA

IPC: G02F1/1343 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/1337

Abstract: The present invention provides a liquid crystal display device of a transverse electric field mode that may inhibit internal reflection and realize proper black display to which coloring does not occur. The present invention provides a liquid crystal display device including a first linear polarizer, a first λ/4 retardation layer, a first substrate, a second λ/4 retardation layer configured with a different material from the first λ/4 retardation layer, a liquid crystal layer that contains liquid crystals which are horizontally aligned in a case where no voltage is applied, plural electrode pairs that generate a transverse electric field in the liquid crystal layer by a voltage being applied, a second substrate, a second linear polarizer, and a backlight. In a case where a color of light emitted from the backlight is expressed by using chromaticity coordinates (x, y) of an XYZ color system, both of x and y are 0.32 or greater. The plural electrode pairs include a red electrode pair arranged in a red sub-pixel, a green electrode pair arranged in a green sub-pixel, and a blue electrode pair arranged in a blue sub-pixel. A white display applied voltage of the blue electrode pair is different from the white display applied voltage of the red electrode pair and the white display applied voltage of the green electrode pair.

公开(公告)号：US20210103083A1

公开(公告)日：2021-04-08

申请号：US16319461

申请日：2017-07-18

Applicant: SHARP KABUSHIKI KAISHA

Inventor： KOJI MURATA ,  AKIRA SAKAI ,  YUICHI KAWAHIRA ,  MASAHIRO HASEGAWA ,  TAKAKO KOIDE ,  KOZO NAKAMURA ,  KIYOSHI MINOURA

IPC: G02B5/30 ,  C09K19/56

Abstract: The present invention provides a method for producing a retardation film excellent in retardation controllability against heat and the retardation film. The method for producing a retardation film includes, in the following order: fixing an alignment of liquid crystal compounds to form a retardation giving layer, and heating the retardation giving layer. Preferably, the heating is first heating and the method further includes second heating for heating the retardation giving layer after the first heating.

公开(公告)号：US20200159066A1

公开(公告)日：2020-05-21

申请号：US16684158

申请日：2019-11-14

Applicant: SHARP KABUSHIKI KAISHA

Inventor： YUICHI KAWAHIRA ,  TAKAKO KOIDE ,  AKIRA SAKAI ,  KIYOSHI MINOURA

IPC: G02F1/1335 ,  G02F1/1337

Abstract: A liquid crystal display device includes a liquid crystal panel and a circularly polarizing plate disposed on a viewing side of the liquid crystal panel. The circularly polarizing plate sequentially includes, from a viewing side, a linearly polarizing plate and an out-cell retarder. The liquid crystal panel includes a thin-film transistor substrate, a color filter substrate facing the thin-film transistor substrate and including black matrix, a horizontal alignment liquid crystal layer disposed between the thin-film transistor substrate and the color filter substrate, and an in-cell retarder disposed in one substrate disposed on the viewing side selected from the thin-film transistor substrate and the color filter substrate. The in-cell retarder is disposed outside a region between the black matrix and the horizontal alignment liquid crystal layer.

公开(公告)号：US20190285925A1

公开(公告)日：2019-09-19

申请号：US16334914

申请日：2017-09-20

Applicant: SHARP KABUSHIKI KAISHA

Inventor： MASANOBU MIZUSAKI ,  KIYOSHI MINOURA ,  AKIRA SAKAI

IPC: G02F1/13363 ,  G02F1/137 ,  G02F1/1337

Abstract: Provided is a liquid crystal display device including a first substrate; a second substrate; a liquid crystal layer sandwiched between the first substrate and the second substrate and containing a negative liquid crystal material; a first alignment film provided on the surface of the first substrate on the liquid crystal layer side; a first phase difference layer having birefringence provided between the first substrate and the first alignment film; and a second alignment film disposed on the surface of the second substrate on the liquid crystal layer side, wherein at least one of the first alignment film and the second alignment film is a photo-alignment film being in contact with the liquid crystal layer and imparting a pretilt angle of 75° or more and less than 90° to the liquid crystal material; the first phase difference layer is formed of a first polymer material having a first photofunctional group; the photo-alignment film is formed of a second polymer material having a second photofunctional group; and the first photofunctional group and the second photofunctional group are each a group causing at least one reaction selected from the group consisting of isomerization reaction, dimerization reaction, Fries rearrangement reaction, and cleavage reaction.

公开(公告)号：US20190285924A1

公开(公告)日：2019-09-19

申请号：US16297368

申请日：2019-03-08

Applicant: SHARP KABUSHIKI KAISHA

Inventor： TAKAKO KOIDE ,  AKIRA SAKAI ,  MASAHIRO HASEGAWA ,  YUICHI KAWAHIRA ,  KOJI MURATA ,  KIYOSHI MINOURA

IPC: G02F1/13363 ,  G02F1/1335 ,  G02F1/1337 ,  G02F1/1368 ,  G02F1/1339

Abstract: The present invention provides a liquid crystal display device configured to prevent impurities in a retardation layer in a liquid crystal cell from dissolving into a liquid crystal layer, achieving excellent reliability. The liquid crystal display device including, in the following order from a viewing surface side toward a back surface side: a first polarizing plate; a first λ/4 retardation layer; a supporting substrate; a second λ/4 retardation layer; a first overcoat layer; an alignment film; a liquid crystal layer containing liquid crystal molecules horizontally aligned with no voltage applied; a TFT substrate including a pair of electrodes configured to generate a transverse electric field in the liquid crystal layer upon voltage application; and a second polarizing plate.

公开(公告)号：US20190219871A1

公开(公告)日：2019-07-18

申请号：US16302632

申请日：2017-05-16

Applicant: SHARP KABUSHIKI KAISHA

Inventor： YUICHI KAWAHIRA ,  AKIRA SAKAI ,  KOZO NAKAMURA ,  MASAHIRO HASEGAWA ,  TAKAKO KOIDE ,  KOJI MURATA ,  KIYOSHI MINOURA

IPC: G02F1/1335 ,  G02F1/13363 ,  G02F1/1337 ,  G02F1/1339 ,  G02F1/1343

Abstract: The liquid crystal display panel includes: a first polarizing plate; a first λ/4 plate; a first substrate; a second λ/4 plate; a liquid crystal layer; a second substrate; and a second polarizing plate, wherein the first substrate includes a black matrix but no photo spacer, the second substrate includes a photo spacer overlapping with the black matrix, liquid crystal molecules in the liquid crystal layer homogeneously align with no voltage application, the second λ/4 plate covers no side surface of the photo spacer, and the in-plane slow axis of the first λ/4 plate forms an angle of 45° with the transmission axis of the first polarizing plate and is orthogonal to the in-plane slow axis of the second λ/4 plate.