公开(公告)号：US20230314868A1

公开(公告)日：2023-10-05

申请号：US18127549

申请日：2023-03-28

Applicant: Sharp Display Technology Corporation

Inventor： Akira SAKAI ,  Ryosuke SAIGUSA ,  Yuichi KAWAHIRA ,  Masahiro HASEGAWA ,  Kiyoshi MINOURA

IPC: G02F1/1335

CPC classification number: G02F1/133528

Abstract: Provided is a liquid crystal display device in which reflection and light leakage from oblique directions are reduced or prevented. The liquid crystal display device includes, sequentially in the following order from a back surface side: a first polarizer; a liquid crystal panel; a second polarizer; a first retardation layer; and a third polarizer, wherein light transmitted in an oblique direction between the second polarizer and the third polarizer is elliptically polarized light.

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：US20240103314A1

公开(公告)日：2024-03-28

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

CPC classification number: G02F1/133531 ,  G02F1/1309 ,  G02F1/133308

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：US20230333427A1

公开(公告)日：2023-10-19

申请号：US18134517

申请日：2023-04-13

Applicant: Sharp Display Technology Corporation

Inventor： Akira HIRAI ,  Yuichi KAWAHIRA ,  Akira SAKAI

IPC: G02F1/1335 ,  G02F1/1368

CPC classification number: G02F1/133531 ,  G02F1/1368

Abstract: A liquid crystal display device includes a first polarizing plate, a first substrate including a thin-film transistor, a liquid crystal layer containing liquid crystal molecules, a second substrate, a second polarizing plate, and a backlight. The first polarizing plate, the first substrate, the liquid crystal layer, the second substrate, the second polarizing plate, and the backlight are arranged in this order. The first substrate has a display area and a frame area placed on an outer edge of the display region. The liquid crystal display device has an ink layer between the frame area of the first substrate and the first polarizing plate. The liquid crystal display device has an internal reflectance ratio y of 0.2 to 0.3. The internal reflectance ratio y is expressed by Formula (1-1).

公开(公告)号：US20220276537A1

公开(公告)日：2022-09-01

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：US20230375873A1

公开(公告)日：2023-11-23

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：US20230185139A1

公开(公告)日：2023-06-15

申请号：US18078404

申请日：2022-12-09

Applicant: Sharp Display Technology Corporation

Inventor： Yuichi KAWAHIRA ,  Akira HIRAI ,  Akira SAKAI

IPC: G02F1/135 ,  G02F1/1335 ,  G03F7/039 ,  G02F1/1368

CPC classification number: G02F1/1351 ,  G02F1/133519 ,  G03F7/039 ,  G02F1/1368

Abstract: Provided are a liquid crystal display device that can increase light use efficiency and reduce external light reflection, and a method of producing the liquid crystal display device. The liquid crystal display device sequentially includes, from a back surface side toward a viewing surface side: a first substrate; a liquid crystal layer; and a second substrate, the liquid crystal display device including sub-pixels each including an optical opening allowing light to pass through, the first substrate sequentially including, from the back surface side toward the viewing surface side: a supporting substrate; a metal layer surrounding the optical openings; and a resist layer being superimposed with the metal layer and being in contact with the metal layer, an end of the resist layer being superimposed with an end of the metal layer and having a taper angle θ of 40° or more.

公开(公告)号：US20230095922A1

公开(公告)日：2023-03-30

申请号：US17940103

申请日：2022-09-08

Applicant: Sharp Display Technology Corporation

Inventor： Miho YAMADA ,  Akira SAKAI ,  Masahiro HASEGAWA ,  Yuichi KAWAHIRA ,  Hiroaki ASAGI

IPC: G02B5/30 ,  C09K19/56

Abstract: Provided are a polarizing plate including a polarizing layer containing a lyotropic liquid crystal compound and capable of achieving uniform polarization properties over a large area, and a display device equipped with the polarizing plate. The polarizing plate includes: an alignment film; and a polarizing layer on the alignment film. The alignment film contains an alignment film polymer, has a static contact angle with water of 60° or smaller, and has a slow axis. The polarizing layer contains a lyotropic liquid crystal compound and has an absorption axis parallel to the above slow axis. The lyotropic liquid crystal compound is preferably dichroic.

公开(公告)号：US20240411073A1

公开(公告)日：2024-12-12

申请号：US18732729

申请日：2024-06-04

Applicant: Sharp Display Technology Corporation

Inventor： Ryosuke SAIGUSA ,  Yuichi KAWAHIRA ,  Akira SAKAI

IPC: G02B5/30

Abstract: Provided are a Pancharatnam-Berry phase optical element with less or no occurrence of disclinations and with excellent optical characteristics, and a method of producing a Pancharatnam-Berry phase optical element which is suitable for production of the Pancharatnam-Berry phase optical element above. The Pancharatnam-Berry phase optical element includes: a photoalignment film; and a liquid crystal layer in contact with the photoalignment film. The liquid crystal layer includes alignment domains with reference alignment azimuths of liquid crystal molecules defined by the photoalignment film, the reference alignment azimuths being different from one another. The alignment domains include first alignment domains and second alignment domains, with each of the second alignment domains being positioned between two of the first alignment domains and in contact with each of the two first alignment domains. A difference in reference alignment azimuth between the first alignment domains is not 90°.

公开(公告)号：US20240184163A1

公开(公告)日：2024-06-06

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.