公开(公告)号：US10042201B2

公开(公告)日：2018-08-07

申请号：US15529052

申请日：2015-11-26

Applicant: Sharp Kabushiki Kaisha

Inventor： Akira Sakai ,  Hiroyuki Hakoi ,  Kozo Nakamura ,  Kiyoshi Minoura

IPC: G02F1/1335 ,  G02F1/13363 ,  G02F1/1333 ,  G02F1/1368 ,  G02F1/1343

Abstract: The present invention provides a liquid crystal display device having a high transmittance and excellent visibility in a bright place. The liquid crystal display device of the present invention includes, in the given order, a backlight, a first circular polarizer, a liquid crystal panel, and a second circular polarizer. The first circular polarizer is a reflective circular polarizer including a reflective linear polarizer and a λ/4 plate disposed adjacent to the reflective linear polarizer. The liquid crystal display device satisfies (1) the liquid crystal panel is provided with color filters of two or more colors and has an aperture ratio lower than 43%, or (2) the liquid crystal panel is provided with no color filter and has an aperture ratio of 39% or lower.

公开(公告)号：US12181699B2

公开(公告)日：2024-12-31

申请号：US17889436

申请日：2022-08-17

Applicant: Sharp Kabushiki Kaisha

Inventor： Akira Sakai ,  Masahiro Hasegawa ,  Miho Yamada ,  Kiyoshi Minoura

IPC: G02B5/30 ,  G06F3/041 ,  H10K50/80 ,  H10K59/40

Abstract: An optical stack for a display device includes multiple layers that are incorporated into a display device that further includes a display panel. The optical stack includes a resin layer, an alignment film, an optical compensation layer, a polarizer, and a hard coat layer that are stacked in this order from a panel side. The optical stack is formed by preparing and coating a solution for each layer, and then curing and otherwise treating each layer as warranted for a particular layer, in turn to form the optical stack.

公开(公告)号：US11435509B2

公开(公告)日：2022-09-06

申请号：US16666596

申请日：2019-10-29

Applicant: Sharp Kabushiki Kaisha

Inventor： Akira Sakai ,  Masahiro Hasegawa ,  Miho Yamada ,  Kiyoshi Minoura

IPC: G02B5/30 ,  G06F3/041 ,  H01L27/32 ,  H01L51/52

Abstract: An optical stack for a display device includes multiple layers that are incorporated into a display device that further includes a display panel. The optical stack includes a resin layer, an alignment film, an optical compensation layer, a polarizer, and a hard coat layer that are stacked in this order from a panel side. The optical stack is formed by preparing and coating a solution for each layer, and then curing and otherwise treating each layer as warranted for a particular layer, in turn to form the optical stack.

公开(公告)号：US11347118B2

公开(公告)日：2022-05-31

申请号：US17393439

申请日：2021-08-04

Applicant: Sharp Kabushiki Kaisha

Inventor： Akira Sakai ,  Masahiro Hasegawa ,  Miho Yamada ,  Yuichi Kawahira ,  Koji Murata ,  Kiyoshi Minoura

IPC: G02F1/1343 ,  G02F1/1337 ,  G02F1/1333 ,  G02F1/1335 ,  G02F1/135

Abstract: A liquid crystal display panel includes a first substrate, a second substrate, a liquid crystal layer, a first polarizer plate, and a second polarizer plate. The first substrate includes a first dielectric substrate, a first electrode, a second electrode, and a first alignment film. The second electrode includes a plurality of slits and a conductive portion. The second substrate includes a second dielectric substrate and a second alignment film. The first substrate further includes a resin layer disposed between the second electrode and the first alignment film. The resin layer within the plurality of slits is as thick as or thicker than the second electrode. The plurality of slits are filled with the resin layer. A difference in height between the resin layer over the conductive portion of the second electrode and the resin layer within the plurality of slits of the second electrode is 10 nm or more.

公开(公告)号：US11181770B2

公开(公告)日：2021-11-23

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 ,  G02F1/1343 ,  G02F1/1337

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：US11169419B2

公开(公告)日：2021-11-09

申请号：US16831657

申请日：2020-03-26

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Koji Murata ,  Akira Sakai ,  Yuichi Kawahira ,  Takako Koide ,  Masahiro Hasegawa ,  Kiyoshi Minoura

IPC: G02F1/1337

Abstract: A photo-alignment film of the present invention includes a polymer layer containing a photoreactive polymer and metal nanoparticles dispersed in the polymer layer at a concentration of 109 particles/(cm2×100 nm) or more and 1019 particles/(cm2×100 nm) or less. The metal nanoparticles have an absorption peak in a wavelength region of 420 nm or less. An absorbance A1 at the absorption peak of the metal nanoparticles and an absorbance A2 at an absorption peak of the polymer layer satisfy a relationship represented by the following formula 1: 0.2≤A1/A2≤25  (Formula 1).

公开(公告)号：US10948778B2

公开(公告)日：2021-03-16

申请号：US16321330

申请日：2017-07-28

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Masahiro Hasegawa ,  Koji Murata ,  Yuichi Kawahira ,  Takako Koide ,  Kozo Nakamura ,  Akira Sakai ,  Kiyoshi Minoura

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

Abstract: A liquid crystal display panel of the present invention includes, sequentially from the viewer side: a first linearly polarizing plate; a first λ/4-wavelength layer; a first substrate including a color filter, a black matrix, and a second λ/4-wavelength layer; a liquid crystal layer; a second substrate; and a second linearly polarizing plate, the liquid crystal display panel further including a sealing material disposed so as to surround the liquid crystal layer in a plan view, wherein the second λ/4-wavelength layer is disposed closer to the liquid crystal layer than the color filter and the black matrix are and such that an outer edge of the second λ/4-wavelength layer lies inside an arrangement region of the sealing material, and the first λ/4-wavelength layer and the second λ/4-wavelength layer are disposed such that their slow axes are perpendicular to each other.

公开(公告)号：US10802344B2

公开(公告)日：2020-10-13

申请号：US16334914

申请日：2017-09-20

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Masanobu Mizusaki ,  Kiyoshi Minoura ,  Akira Sakai

IPC: G02F1/13363 ,  G02F1/1337 ,  G02F1/137 ,  G02F1/1335

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：US10782556B2

公开(公告)日：2020-09-22

申请号：US16778108

申请日：2020-01-31

Applicant: Sharp Kabushiki Kaisha

Inventor： Nathan James Smith ,  Kiyoshi Minoura ,  Akira Sakai ,  Yuichi Kawahira

IPC: G02F1/1335 ,  G02F1/1362 ,  G02F1/1337 ,  H01L27/12 ,  G02F1/13357 ,  G02F1/135

Abstract: A display device in which ambient light reflections, for example, from IPS or FFS type displays are reduced by a circular polariser (e.g., linear polariser combined with external quarter waveplate) to make the light circular polarized, as it traverses the multiple reflective layers between the polariser and LC layer, and then an internal quarter waveplate converts the light back to linear polarisation before it enters the LC, so the display can operate as normal, while the circular polariser absorbs unwanted reflections of ambient light from within the display.

公开(公告)号：US20200064671A1

公开(公告)日：2020-02-27

申请号：US16546584

申请日：2019-08-21

Applicant: Sharp Kabushiki Kaisha

Inventor： Yuichi Kawahira ,  Koji Murata ,  Takako Koide ,  Masahiro Hasegawa ,  Akira Sakai

IPC: G02F1/1333 ,  G02F1/1347 ,  G06F3/041

Abstract: The present invention relates to a liquid crystal panel including in the following order from a viewing surface side: an antireflection film; a circularly polarizing plate including a linearly polarizing plate and an out-cell retarder; a touch panel including a support and a detection electrode; a panel substrate; and an in-cell retarder, the support having a retardation slow axis that forms an angle of 40° to 50° with a slow axis of the in-cell retarder and with a slow axis of the out-cell retarder, the support having a retardation of 3 nm or smaller.