公开(公告)号：US12265307B2

公开(公告)日：2025-04-01

申请号：US18239090

申请日：2023-08-28

Applicant: Sharp Display Technology Corporation

Inventor： Koji Murata ,  Akira Hirai ,  Hiroshi Tsuchiya ,  Takashi Satoh ,  Akira Sakai ,  Shinji Shimada

IPC: G02F1/1362 ,  G02F1/13

Abstract: Provided is a liquid crystal display device including a liquid crystal panel including in the following order an active matrix substrate, a liquid crystal layer, and a counter substrate. The active matrix substrate includes in the following order a first electrode and a second electrode including a first linear electrode portion extending in a first direction. The counter substrate includes a third electrode including second linear electrode portions extending in a second direction crossing the first direction, and a fourth electrode including an island-shaped electrode portion as a floating electrode. The island-shaped electrode portion is disposed between the second linear electrode portions in a plan view, overlaps an optical aperture of one of two pixels adjacent to each other along the second direction, and does not overlap an optical aperture of the other of the two pixels.

公开(公告)号：US11988910B1

公开(公告)日：2024-05-21

申请号：US18379427

申请日：2023-10-12

Applicant: Sharp Display Technology Corporation

Inventor： Koji Murata ,  Junichi Masuda ,  Shugo Yagi ,  Akira Hirai ,  Hiroshi Tsuchiya ,  Takashi Satoh ,  Akira Sakai ,  Kiyoshi Minoura

IPC: G02F1/13 ,  G02F1/1335 ,  G02F1/1347

CPC classification number: G02F1/1323 ,  G02F1/133528 ,  G02F1/1347

Abstract: A viewing angle-controlling liquid crystal panel sequentially includes a first polarizing plate; a first liquid crystal panel; a second polarizing plate; a second liquid crystal panel; and a third polarizing plate, wherein an azimuthal angle φP1 of the absorption axis of the first polarizing plate, an azimuthal angle φ1 of a director of liquid crystal molecules near the first substrate and an azimuthal angle φ2 of a director of liquid crystal molecules near the second substrate in the first liquid crystal panel, an azimuthal angle φP2 of the absorption axis of the second polarizing plate, an azimuthal angle φ3 of a director of liquid crystal molecules near the third substrate and an azimuthal angle φ4 of a director of liquid crystal molecules near the fourth substrate in the second liquid crystal panel, and an azimuthal angle φP3 of the absorption axis of the third polarizing plate satisfy specific formulas.

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：US11841575B2

公开(公告)日：2023-12-12

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 ,  G02F1/1343

CPC classification number: G02F1/133531 ,  G02F1/1368 ,  G02F1/1343 ,  G02F1/133512 ,  G02F1/133514 ,  G02F1/133528

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 substate, a second polarizing plate, and a backlight. The first polarizing plate, the first substate, 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：US11774813B2

公开(公告)日：2023-10-03

申请号：US18078404

申请日：2022-12-09

Applicant: Sharp Display Technology Corporation

Inventor： Yuichi Kawahira ,  Akira Hirai ,  Akira Sakai

IPC: G02F1/1335 ,  G02F1/1362 ,  G02F1/1368 ,  G02F1/1333 ,  G02F1/135 ,  G03F7/039

CPC classification number: G02F1/1351 ,  G02F1/1368 ,  G02F1/133345 ,  G02F1/133519 ,  G02F1/133553 ,  G03F7/039 ,  G02F1/136286

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.