公开(公告)号：US12287548B2

公开(公告)日：2025-04-29

申请号：US18691293

申请日：2021-11-16

Applicant: Sharp Display Technology Corporation

Inventor： Kimiaki Nakamura ,  Masakazu Shibasaki ,  Yasuhiro Haseba ,  Koji Murata

IPC: G02F1/1343 ,  G02F1/133 ,  G02F1/1334 ,  G02F1/1335 ,  G02F1/1339

Abstract: A display device includes: a plurality of first colored particles contained in a space between a first substrate and a second substrate; a light-emitting portion having a first light-emitting element provided on the first substrate, and a first-light-emitting-element driving circuit provided on the first substrate and configured to drive the first light-emitting element; a first transparent portion disposed in a direction along a main surface of the first substrate with respect to the light-emitting portion; a first electrode provided in the light-emitting portion; and a second electrode provided in the first transparent portion and being nckudestransparent. The display device is capable of switching between a light-transmitting state of the first transparent portion in which the first electrode attracts the plurality of first colored particles, and a light-blocking state of the first transparent portion in which the second electrode attracts the plurality of first colored particles.

公开(公告)号：US12135478B2

公开(公告)日：2024-11-05

申请号：US18102883

申请日：2023-01-30

Applicant: Sharp Display Technology Corporation

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

IPC: G02F1/1335 ,  G02F1/13357 ,  G02F1/1343 ,  G02F1/137

Abstract: Provided is a liquid crystal panel sequentially including: a first polarizing plate with a first absorption axis; a first substrate including a first electrode; a liquid crystal layer containing liquid crystal molecules; and a second substrate including a second electrode. The liquid crystal panel satisfies the following Formula (1) as well as the following Formula (2-1) or Formula (2-2): 5°≤|φ1−φ2|≤20°  (Formula 1) 5°≤|φP1−φ2|≤20°  (Formula 2-1) 65°≤|φP1−φ2|≤80°  (Formula 2-2) wherein φ1 represents an azimuthal angle of a director of liquid crystal molecules near the first substrate, φ2 represents an azimuthal angle of a director of liquid crystal molecules near the second substrate, and φP1 represents an azimuthal angle of the first absorption axis of the first polarizing plate, each with no voltage applied.

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：US12117679B2

公开(公告)日：2024-10-15

申请号：US18097171

申请日：2023-01-13

Applicant: Sharp Display Technology Corporation

Inventor： Koji Murata ,  Hiroshi Tsuchiya ,  Shinpei Higashida ,  Takahiro Sasaki ,  Takashi Satoh ,  Shinji Shimada

IPC: G02F1/13 ,  F21V8/00 ,  G02F1/1335 ,  G02F1/1343 ,  G02F1/1362 ,  G02F1/137

CPC classification number: G02F1/1323 ,  G02B6/0038 ,  G02F1/133512 ,  G02F1/133514 ,  G02F1/134336 ,  G02F1/134345 ,  G02F1/13439 ,  G02F1/136286 ,  G02F1/137 ,  G02B2207/123

Abstract: Provided is a liquid crystal display device that can switch between the privacy mode and the public mode and achieve a high contrast ratio even during display in the privacy mode. The liquid crystal display panel includes: a liquid crystal panel; and a control circuit. The active matrix substrate sequentially includes a first substrate, a first electrode, a first insulating layer, and second electrodes each including a first linear electrode. The color filter substrate includes a second substrate, a black matrix, a color filter layer, a third electrode, and a fourth electrode which is disposed between the black matrix and the third electrode and to which constant voltage is applied. The third electrode includes second linear electrodes and overlaps a portion of the black matrix in a plan view. The control circuit switches between application of driving voltage and application of constant voltage to the third electrode.

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：US12078878B1

公开(公告)日：2024-09-03

申请号：US18416697

申请日：2024-01-18

Applicant: Sharp Display Technology Corporation

Inventor： Koji Murata ,  Akira Hirai ,  Takashi Satoh ,  Akira Sakai ,  Kiyoshi Minoura

IPC: G02F1/13 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/1343

CPC classification number: G02F1/1323 ,  G02F1/133512 ,  G02F1/133514 ,  G02F1/133528 ,  G02F1/133638 ,  G02F1/134381

Abstract: A viewing angle control liquid crystal panel includes: a first polarizer having a first absorption axis; a first liquid crystal panel including a first substrate, a first liquid crystal layer, and a second substrate; a second liquid crystal panel including a third substrate, a second liquid crystal layer, and a fourth substrate; and a third liquid crystal panel including a fifth substrate, a third liquid crystal layer, and a sixth substrate. The following equations are satisfied, where φP1 is an azimuth angle of the first absorption axis and φ1, φ2, φ3, φ4, φ5, and φ6 are azimuth angles of directors of liquid crystal molecules on first, second, third, fourth, fifth, and sixth substrate sides:

0°≤|φ1−φ2|≤5°

0°≤|φP1−φ1|≤5°

0°≤|φ3−φ4|≤5°

0°≤|φ5−φ6|≤5°.

公开(公告)号：US20240272463A1

公开(公告)日：2024-08-15

申请号：US18416697

申请日：2024-01-18

Applicant: Sharp Display Technology Corporation

Inventor： Koji Murata ,  Akira Hirai ,  Takashi Satoh ,  Akira Sakai ,  Kiyoshi Minoura

IPC: G02F1/13 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/1343

CPC classification number: G02F1/1323 ,  G02F1/133512 ,  G02F1/133514 ,  G02F1/133528 ,  G02F1/133638 ,  G02F1/134381

Abstract: A viewing angle control liquid crystal panel includes: a first polarizer having a first absorption axis; a first liquid crystal panel including a first substrate, a first liquid crystal layer, and a second substrate; a second liquid crystal panel including a third substrate, a second liquid crystal layer, and a fourth substrate; and a third liquid crystal panel including a fifth substrate, a third liquid crystal layer, and a sixth substrate. The following equations are satisfied, where φP1 is an azimuth angle of the first absorption axis and φ1, φ2, φ3, φ4, φ5, and φ6 are azimuth angles of directors of liquid crystal molecules on first, second, third, fourth, fifth, and sixth substrate sides:


0°≤|φ1−φ2|≤5°



0°≤|φP1−φ1|≤5°



0°≤|φ3−φ4|≤5°



0°≤|φ5−φ6|≤5°.

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：US11982917B2

公开(公告)日：2024-05-14

申请号：US17882249

申请日：2022-08-05

Applicant: Sharp Display Technology Corporation

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

IPC: G02F1/139 ,  G02F1/13 ,  G02F1/1335 ,  G02F1/1337 ,  G02F1/1343 ,  G02F1/1347 ,  G02F1/137

CPC classification number: G02F1/1393 ,  G02F1/1323 ,  G02F1/133531 ,  G02F1/133719 ,  G02F1/133738 ,  G02F1/134363 ,  G02F1/134372 ,  G02F1/1347 ,  G02F1/13706

Abstract: The liquid crystal panel of the present invention sequentially includes: a first substrate including a first electrode; a first alignment film; a liquid crystal layer containing liquid crystal molecules having a positive anisotropy of dielectric constant; a second alignment film; and a second substrate including a second electrode, the liquid crystal molecules being homogeneously aligned with no voltage applied between the first electrode and the second electrode, a polar anchoring energy 2EA and an azimuthal anchoring energy 2EB of the second alignment film being smaller than a polar anchoring energy 1EA and an azimuthal anchoring energy 1EB of the first alignment film, respectively, the polar anchoring energy 2EA of the second alignment film being not greater than the azimuthal anchoring energy 2EB of the second alignment film.

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.