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：US20200319503A1

公开(公告)日：2020-10-08

申请号：US16303640

申请日：2017-05-16

Applicant: SHARP KABUSHIKI KAISHA

Inventor： TAKUYA OOTANI ,  KIYOSHI MINOURA ,  TAKASHI SATOH

IPC: G02F1/1335 ,  G02F1/1337 ,  G02F1/13363 ,  G02F1/1362

Abstract: A reflective liquid crystal display device has a first substrate having a first electrode that reflects light; a second substrate having a second electrode that transmits light; a liquid crystal layer provided between the first electrode and the second electrode, including a nematic liquid crystal material having negative dielectric anisotropy Δε and a chiral agent, having nearly vertical alignment when no voltage is applied, and having twist alignment or hybrid alignment when white voltage is applied; and a polarizing layer provided on the observer side of the second substrate and at least one retarder layer disposed between the polarizing layer and the second substrate, wherein the reflective liquid crystal display device has a drive circuit that applies black voltage or white voltage across the liquid crystal layer at a frame rate of 1 fps or less, and when applying white voltage across the liquid crystal layer over a plurality of frames, the drive circuit applies the white display voltage whose polarity is inverted for each frame with respect to the potential of the second electrode, and assuming that a natural pitch of the nematic liquid crystal material including the chiral agent is p, that a thickness of the liquid crystal layer is d, and that a birefringence of the nematic liquid crystal material is Δn, 60°

公开(公告)号：US20200309420A1

公开(公告)日：2020-10-01

申请号：US16831662

申请日：2020-03-26

Applicant: SHARP KABUSHIKI KAISHA

Inventor： YASUHIRO HASEBA ,  KIYOSHI MINOURA

IPC: F25B21/00 ,  H01H71/14

Abstract: The cooling device includes an electrocaloric portion including an electrocaloric effect material, a first thermal switch including a first actuator, and a second thermal switch including a second actuator, in which a thickness and a length of the first actuator and the second actuator are changed depending on an electric field to be applied.

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：US20200050077A1

公开(公告)日：2020-02-13

申请号：US16515841

申请日：2019-07-18

Applicant: SHARP KABUSHIKI KAISHA

Inventor： MASANOBU MIZUSAKI ,  KIYOSHI MINOURA

IPC: G03B9/08 ,  G02F1/1333 ,  G02F1/1343

Abstract: The present invention provides a highly reliable optical shutter for camera modules capable of preventing the occurrence of a streaky transparent portion in a polymer network liquid crystal layer in a scattering state, and a method for producing the optical shutter for camera modules. The optical shutter for camera modules includes: a pair of substrates bonded together with a seal; and a polymer network liquid crystal layer sealed between the substrates, wherein at least one of the substrates includes a transparent electrode made of an oxide conductive film and a coating film that covers the transparent electrode and contains a polymer with a polyamic acid structure in a main chain.

公开(公告)号：US20190302540A1

公开(公告)日：2019-10-03

申请号：US16359091

申请日：2019-03-20

Applicant: SHARP KABUSHIKI KAISHA

Inventor： MASANOBU MIZUSAKI ,  KIYOSHI MINOURA

IPC: G02F1/1337 ,  G02F1/1335 ,  G02F1/137 ,  C09K19/56

Abstract: A liquid crystal cell includes a color filter substrate, an array substrate, a liquid crystal layer, and two alignment control layers. The color filter substrate includes a color conversion layer for converting color of light but not include an alignment film containing polyamic acid or polyamide. The array substrate is opposed to the color filter substrate. The alignment control layers are formed on an inner surface of the color filter substrate and an inner surface of the array substrate, respectively. The alignment control layers contact the liquid crystal layer. The alignment control layers are made of reactants of radical polymerizable monomers added to a liquid crystal material for forming the liquid crystal layer. The alignment control layers control orientations of liquid crystal molecules in the liquid crystal layer. The radical polymerizable monomers include radical polymerizable monomers having ultraviolet-ray absorbing functional groups.

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.