公开(公告)号：US11852911B2

公开(公告)日：2023-12-26

申请号：US17852411

申请日：2022-06-29

Applicant: Sharp Display Technology Corporation

Inventor： Koji Murata ,  Yasuhiro Haseba ,  Kazutaka Hanaoka ,  Kimiaki Nakamura ,  Mariko Honda ,  Atsuko Kanashima ,  Tadashi Hasegawa ,  Shinji Shimada

IPC: G02F1/1334 ,  G02F1/137 ,  G02F1/1337 ,  G02F1/13357

CPC classification number: G02F1/1334 ,  G02F1/1337 ,  G02F1/13706 ,  G02F1/133603

Abstract: Provided is a liquid crystal display device capable of switching between a transparent state and a scattering state, reducing or preventing a decrease in transmittance in the transparent state, and reducing or preventing a decrease in luminance in the panel central portion in the scattering state. The liquid crystal display device includes, sequentially from its viewing surface side toward its back surface side: a first liquid crystal panel; a light source; and a second liquid crystal panel, the first liquid crystal panel including a polymer dispersed liquid crystal containing a polymer network and liquid crystal components, the light source being configured to irradiate a back surface side main surface of the first liquid crystal panel with light from an oblique direction.

公开(公告)号：US12174469B2

公开(公告)日：2024-12-24

申请号：US18122725

申请日：2023-03-17

Applicant: Sharp Display Technology Corporation

Inventor： Koji Murata ,  Hiroshi Tsuchiya ,  Atsuko Kanashima ,  Takashi Satoh ,  Shinji Shimada

IPC: G02F1/13 ,  G02F1/1335 ,  G02F1/1343

Abstract: Provided is a display device including a backlight; a first liquid crystal panel; a display panel; and a second liquid crystal panel. The first liquid crystal panel includes a first substrate, a first liquid crystal layer containing first liquid crystal molecules, and a second substrate. The second liquid crystal panel includes a third substrate, a second liquid crystal layer containing second liquid crystal molecules, and a fourth substrate. The display device satisfies the following formula: |φ3−φ1|≥50°, wherein φ1 represents an azimuthal angle of a director of the first liquid crystal molecules near the first substrate with no voltage applied to the first liquid crystal layer, and 43 represents an azimuthal angle of a director of the second liquid crystal molecules near the third substrate with no voltage applied to the second liquid crystal layer.

公开(公告)号：US12007640B2

公开(公告)日：2024-06-11

申请号：US18383548

申请日：2023-10-25

Applicant: Sharp Display Technology Corporation

Inventor： Koji Murata ,  Yasuhiro Haseba ,  Kazutaka Hanaoka ,  Kimiaki Nakamura ,  Mariko Honda ,  Atsuko Kanashima ,  Tadashi Hasegawa ,  Shinji Shimada

IPC: G02F1/1334 ,  G02F1/13357 ,  G02F1/1337 ,  G02F1/137

CPC classification number: G02F1/1334 ,  G02F1/133603 ,  G02F1/1337 ,  G02F1/13706

Abstract: Provided is a liquid crystal display device capable of switching between a transparent state and a scattering state, reducing or preventing a decrease in transmittance in the transparent state, and reducing or preventing a decrease in luminance in the panel central portion in the scattering state. The liquid crystal display device includes, sequentially from its viewing surface side toward its back surface side: a first liquid crystal panel; a light source; and a second liquid crystal panel, the first liquid crystal panel including a polymer dispersed liquid crystal containing a polymer network and liquid crystal components, the light source being configured to irradiate a back surface side main surface of the first liquid crystal panel with light from an oblique direction.

公开(公告)号：US11829021B2

公开(公告)日：2023-11-28

申请号：US17579388

申请日：2022-01-19

Applicant: Sharp Display Technology Corporation

Inventor： Koji Murata ,  Kimiaki Nakamura ,  Mariko Honda ,  Tadashi Hasegawa ,  Kazutaka Hanaoka ,  Yasuhiro Haseba ,  Shinji Shimada ,  Atsuko Kanashima

IPC: G02F1/1334 ,  G02F1/1341 ,  G02F1/1337

CPC classification number: G02F1/13347 ,  G02F1/1341 ,  G02F1/13345 ,  G02F1/133738 ,  G02F1/133788

Abstract: Provided is a polymer dispersed liquid crystal display device including: a pair of substrates including an electrode on at least one substrate; and a composite layer disposed between the pair of substrates. The composite layer includes a liquid crystal component and a polymer network constituted by a cured product of a photopolymerizable liquid crystal compound, and is in a transparent state when no voltage is applied and in a scattering state when a voltage is applied, and the polymer network has a helical structure with a number of turns of from one to less than eight in the composite layer.