公开(公告)号：US11934069B2

公开(公告)日：2024-03-19

申请号：US17893313

申请日：2022-08-23

Applicant: Sharp Display Technology Corporation

Inventor： Akira Sakai ,  Yuichi Kawahira ,  Masahiro Hasegawa ,  Ryosuke Saigusa

IPC: G02F1/13363 ,  G02F1/1335

CPC classification number: G02F1/13363 ,  G02F1/133531 ,  G02F1/133536

Abstract: An optical element includes, sequentially from a viewing surface side toward a back surface side: a viewing-surface-side polarizer; a retarder; and a back-surface-side polarizer, a transmission axis of the viewing-surface-side polarizer and a transmission axis of the back-surface-side polarizer being parallel to each other, the optical element having an average angle θ between an angle θ1 and an angle θ2 of greater than 0° and smaller than 90°, wherein the angle θ1 represents an angle formed by an optical axis of the retarder on a surface close to the back surface with the surface close to the back surface; and the angle θ2 represents an angle formed by an optical axis of the retarder on a surface close to the viewing surface with the surface close to the viewing surface.

公开(公告)号：US11822181B1

公开(公告)日：2023-11-21

申请号：US18195848

申请日：2023-05-10

Applicant: Sharp Display Technology Corporation

Inventor： Yuichi Kawahira ,  Masahiro Hasegawa ,  Ryosuke Saigusa ,  Akira Sakai

IPC: G02F1/1335 ,  G02F1/13363

CPC classification number: G02F1/133531 ,  G02F1/13363 ,  G02F1/133607

Abstract: Provided is a liquid crystal display device sequentially including: a first polarizer; a liquid crystal panel; a second polarizer; a biaxial retarder; a third polarizer; and a backlight including a light source and a prism sheet disposed closer to the viewing surface side than the light source is. The prism sheet includes prisms arranged in multiple columns on a surface close to the viewing surface side. The liquid crystal display has a light diffusion property curve having no side lobe or having a side lobe satisfying a ratio of a local maximum luminance to a local minimum luminance of 1.35 or less, the light diffusion property curve being obtained by plotting a luminance in a white display state in a direction perpendicular to ridge lines of the prisms against a polar angle.

公开(公告)号：US12174482B2

公开(公告)日：2024-12-24

申请号：US18239318

申请日：2023-08-29

Applicant: Sharp Display Technology Corporation

Inventor： Ryosuke Saigusa ,  Akira Sakai ,  Yuichi Kawahira ,  Masahiro Hasegawa

IPC: G02F1/1335 ,  G02F1/13 ,  G02F1/1333

Abstract: Provided is a display device in which warping of a display panel is sufficiently reduced or prevented. The display device includes: a display panel; and a polarizer, the polarizer being provided with at least one notch that extends inward from an outer edge of the polarizer.

公开(公告)号：US12204197B2

公开(公告)日：2025-01-21

申请号：US18595844

申请日：2024-03-05

Applicant: Sharp Display Technology Corporation

Inventor： Yuichi Kawahira ,  Masahiro Hasegawa ,  Ryosuke Saigusa ,  Jianeng Xu ,  Akira Sakai

IPC: G02F1/1335 ,  G02F1/1333

Abstract: A color filter includes a frame portion in which the reflectance of light incident from the transparent substrate side is less than the reflectance of light incident from the overcoat layer side and an opening portion in which the reflectance of light incident from the transparent substrate side is greater than the reflectance of light incident from the overcoat layer side. The color filter satisfies nbc×dbc

公开(公告)号：US20240345434A1

公开(公告)日：2024-10-17

申请号：US18595844

申请日：2024-03-05

Applicant: Sharp Display Technology Corporation

Inventor： Yuichi KAWAHIRA ,  Masahiro Hasegawa ,  Ryosuke Saigusa ,  Jianeng Xu ,  Akira Sakai

IPC: G02F1/1335

CPC classification number: G02F1/133519 ,  G02F1/133512

Abstract: A color filter includes a frame portion in which the reflectance of light incident from the transparent substrate side is less than the reflectance of light incident from the overcoat layer side and an opening portion in which the reflectance of light incident from the transparent substrate side is greater than the reflectance of light incident from the overcoat layer side. The color filter satisfies nbc×dbc

公开(公告)号：US11927775B2

公开(公告)日：2024-03-12

申请号：US18134504

申请日：2023-04-13

Applicant: Sharp Display Technology Corporation

Inventor： Masahiro Hasegawa ,  Akira Sakai ,  Kiyoshi Minoura

IPC: G02B30/24 ,  G02B30/25 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/1347 ,  G02C11/00

CPC classification number: G02B30/24 ,  G02B30/25 ,  G02F1/133528 ,  G02F1/133634 ,  G02F1/133638 ,  G02F1/1347 ,  G02C11/10 ,  G02F2413/04 ,  G02F2413/13 ,  G02F2413/14

Abstract: Provided are 3D glasses capable of reducing crosstalk when disposed on the viewer side of a liquid crystal panel that is time-divisionally driven; an optical device including the 3D glasses; and a three-dimensional image display device including the optical device. The 3D glasses include a right-eye polarizer and a left-eye polarizer, the right-eye polarizer and the left-eye polarizer each including a polarizing plate and a first λ/4 plate, at least one of the right-eye polarizer or the left-eye polarizer including a phase difference layer on or behind a back surface side of the polarizing plate, wherein a phase difference introduced by the right-eye polarizer in a thickness direction at a wavelength of 550 nm is different from a phase difference introduced by the left-eye polarizer in the thickness direction at a wavelength of 550 nm.

公开(公告)号：US11550187B2

公开(公告)日：2023-01-10

申请号：US17671913

申请日：2022-02-15

Applicant: Sharp Display Technology Corporation

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

IPC: G02F1/13363 ,  G02F1/1335

Abstract: The liquid crystal display device includes: a first polarizer having a first transmission axis; a liquid crystal panel; a second polarizer having a second transmission axis; a biaxial retarder having a slow axis parallel to the second transmission axis; a third polarizer having a third transmission axis parallel to the second transmission axis; and a backlight, a back side polarizer portion that includes the second polarizer, the biaxial retarder, and the third polarizer satisfying the following formula (1): ΔYI2=YI2′− YI2

公开(公告)号：US11988918B1

公开(公告)日：2024-05-21

申请号：US18382267

申请日：2023-10-20

Applicant: Sharp Display Technology Corporation

Inventor： Yuichi Kawahira ,  Masahiro Hasegawa ,  Ryosuke Saigusa ,  Jianeng Xu ,  Akira Sakai

IPC: G02F1/1335 ,  G02F1/13357

CPC classification number: G02F1/133531 ,  G02F1/133605 ,  G02F1/133607 ,  G02F2202/40

Abstract: Provided is an optical element including a phase difference layer. The phase difference layer is a laminate of n first phase difference layers and m second phase difference layers. The n first phase difference layers each contain first anisotropic molecules with tilt angles different between a viewing surface side and a back surface side. The m second phase difference layers each contain second anisotropic molecules with tilt angles different between a viewing surface side and a back surface side. Slow axes of the n first phase difference layers are in a same orientation. Slow axes of the m second phase difference layers are in a same orientation. The slow axes of the n first phase difference layers and the slow axes of the m second phase difference layers are anti-parallel to each other and are parallel to or perpendicular to the transmission axis of the first polarizer.

公开(公告)号：US11927850B2

公开(公告)日：2024-03-12

申请号：US18195917

申请日：2023-05-10

Applicant: Sharp Display Technology Corporation

Inventor： Yuichi Kawahira ,  Masahiro Hasegawa ,  Ryosuke Saigusa ,  Akira Sakai

IPC: G02F1/13363 ,  G02B27/01 ,  G02F1/1335 ,  G06F1/16

CPC classification number: G02F1/133634 ,  G02B27/0172 ,  G02F1/133531 ,  G02F1/133536 ,  G02F1/133567 ,  G06F1/163 ,  G02F2413/01 ,  G02F2413/02 ,  G02F2413/06 ,  G02F2413/08 ,  G02F2413/12

Abstract: Provided is a liquid crystal display device having high luminance and high CR in a front direction and especially useful as a head-mounted liquid crystal display device, for example. The liquid crystal display device includes: a liquid crystal panel; an optical element; and a backlight, arranged in this order from a viewing surface side. The optical element includes a first polarizer, a retardation layer, and a second polarizer. The first polarizer, the retardation layer, and the second polarizer are arranged in this order from the viewing surface side. The first polarizer and the second polarizer are reflection polarizers. A reflection axis of the first polarizer and a reflection axis of the second polarizer are parallel to each other. In oblique directions at azimuths of 0°, 45°, and 90° at a polar angle of 60°, a polarization state of light incident on the first polarizer is elliptical polarization.

公开(公告)号：US12174483B2

公开(公告)日：2024-12-24

申请号：US18380870

申请日：2023-10-17

Applicant: Sharp Display Technology Corporation

Inventor： Yuichi Kawahira ,  Masahiro Hasegawa ,  Ryosuke Saigusa ,  Jianeng Xu ,  Akira Sakai

IPC: G02F1/1335 ,  G02B5/30 ,  G02F1/13363 ,  G02F1/1337

Abstract: Provided is an optical element including, sequentially from a viewing surface side toward a back surface side: a first polarizer; a negative C plate; a phase difference layer; and a second polarizer. A transmission axis of the first polarizer is parallel to a transmission axis of the second polarizer. The phase difference layer contains anisotropic molecules. In the phase difference layer, a tilt angle of the anisotropic molecules on a viewing surface side in the phase difference layer and a tilt angle of the anisotropic molecules on a back surface side in the phase difference layer are the same as each other and greater than 0°. A slow axis of the phase difference layer, in a case of lying in a tilt direction of the anisotropic molecules, is parallel to or perpendicular to the transmission axis of the first polarizer.