公开(公告)号：US20250027631A1

公开(公告)日：2025-01-23

申请号：US18907964

申请日：2024-10-07

Applicant: Japan Display Inc.

Inventor： Tae KUROKAWA ,  Takeo KOITO ,  Kojiro IKEDA

IPC: F21V9/40 ,  G02F1/1343 ,  G02F1/1347

Abstract: An optical element includes a first liquid crystal cell and a second liquid crystal cell. The first liquid crystal cell and the second liquid crystal cell are stacked. Each of the first liquid crystal cell and the second liquid crystal cell includes a first substrate on which a first transparent electrode and a second transparent electrode are alternately and repeatedly arranged in a first direction, a second substrate on which a third transparent electrode and a fourth transparent electrode are alternately and repeatedly arranged in a second direction intersecting the first direction, and a liquid crystal layer between the first substrate and the second substrate. The second substrate of the first liquid crystal cell and the first substrate of the second liquid crystal cell are adjacent to each other.

公开(公告)号：US20240392934A1

公开(公告)日：2024-11-28

申请号：US18796776

申请日：2024-08-07

Applicant: Japan Display Inc.

Inventor： Kojiro IKEDA ,  Takeo KOITO ,  Keiji TAKIZAWA

IPC: F21K9/65 ,  F21V14/00 ,  F21Y105/18 ,  F21Y113/13 ,  F21Y115/10

Abstract: A lighting device includes a light source including at least two types of light emitting elements with different color temperatures, an optical element including a plurality of liquid crystal cells and configured to control a distribution of light emitted from the light source, and a control unit configured to control the light source. The control unit controls the optical element to change from a first light distribution state to a second light distribution state different from the first light distribution state. The control unit controls the light source so that a color temperature of light emitted in a direction perpendicular to a surface of the optical element is the same in the first light distribution state and the second light distribution state.

公开(公告)号：US20240345441A1

公开(公告)日：2024-10-17

申请号：US18751805

申请日：2024-06-24

Applicant: Japan Display Inc.

Inventor： Kojiro IKEDA ,  Takeo KOITO

IPC: G02F1/1343 ,  G02F1/1347

CPC classification number: G02F1/134309 ,  G02F1/1347

Abstract: An optical element includes first to fourth liquid crystal cells. Each of the first to fourth liquid crystal cells includes a first substrate on which a first pair of comb-shaped transparent electrodes are arranged and a second substrate on which a second pair of comb-shaped transparent electrodes are arranged. An extending direction of the first pair of comb-shaped transparent electrodes is orthogonal to an extending direction of the second pair of comb-shaped transparent electrodes. Between two different liquid crystal cells of the first to fourth liquid crystal cells, one of the first pair of comb-shaped transparent electrodes of one liquid crystal cell and one of the second pair of comb-shaped transparent electrodes of the other liquid crystal cell are electrically connected to each other.

公开(公告)号：US20240344685A1

公开(公告)日：2024-10-17

申请号：US18753362

申请日：2024-06-25

Applicant: Japan Display Inc.

Inventor： Kojiro IKEDA ,  Takeo KOITO

IPC: F21V14/00 ,  G02F1/1337 ,  G02F1/1343 ,  G02F1/1347

CPC classification number: F21V14/003 ,  G02F1/1337 ,  G02F1/134309 ,  G02F1/1347

Abstract: Disclosed is a lighting device including a light source, a first liquid crystal panel over the light source, and a second liquid crystal panel over the first liquid crystal panel. Each of the first liquid crystal panel and the second liquid crystal panel includes: a substrate; a plurality of lower electrodes arranged over the substrate in a stripe shape; a first orientation film over the plurality of lower electrodes; a liquid crystal layer over the first orientation film; a second orientation film arranged over the liquid crystal layer and having an orientation direction orthogonal to that of the first orientation film; a plurality of upper electrodes arranged over the second orientation film, orthogonal to the plurality of lower electrodes, and arranged in a stripe shape; and a counter substrate over the plurality of upper electrodes.

公开(公告)号：US20240337883A1

公开(公告)日：2024-10-10

申请号：US18739440

申请日：2024-06-11

Applicant: Japan Display Inc.

Inventor： Tae KUROKAWA ,  Takeo KOITO ,  Kojiro IKEDA

IPC: G02F1/1343 ,  G02F1/1347

CPC classification number: G02F1/13439 ,  G02F1/1347

Abstract: An optical element includes at least two liquid crystal cells. The at least two liquid crystal cells include a first substrate on which a first transparent electrode and a second transparent electrode are alternately and repeatedly arranged in a first direction, a second substrate on which a third transparent electrode and a fourth transparent electrode are alternately and repeatedly arranged in a second direction intersecting the first direction, and a liquid crystal layer between the first substrate and the second substrate. The second transparent electrode comprises a first bent portion bent in the first direction. The fourth transparent electrode comprises a second bent portion bent in the second direction.

公开(公告)号：US20240184170A1

公开(公告)日：2024-06-06

申请号：US18443634

申请日：2024-02-16

Applicant: Japan Display Inc.

Inventor： Kojiro IKEDA ,  Takeo KOITO ,  Tae KUROKAWA

IPC: G02F1/1347 ,  G02F1/1337 ,  G02F1/1343

CPC classification number: G02F1/1347 ,  G02F1/133773 ,  G02F1/134309

Abstract: A liquid crystal light control device includes a plurality of liquid crystal cells arranged in a stack. Each of the plurality of liquid crystal cells includes a first substrate and a second substrate opposite the first substrate, a first electrode and a second electrode both of which have a strip pattern arranged on at least one of the first substrate and the second substrate, a first alignment film on the first substrate and a second alignment film on the second substrate, and a liquid crystal layer between the first substrate and the second substrate. The strip pattern is arranged alternately with the first electrode and the second electrode, an alignment direction of the first alignment film is aligned with a direction of extension of the strip pattern, and an alignment direction of the second alignment film is arranged intersecting the alignment direction of the first alignment film.

公开(公告)号：US20230375883A1

公开(公告)日：2023-11-23

申请号：US18231306

申请日：2023-08-08

Applicant: Japan Display Inc.

Inventor： Tae KUROKAWA ,  Takeo KOITO ,  Kojiro IKEDA

IPC: G02F1/1343 ,  G02F1/1347 ,  G02F1/1337

CPC classification number: G02F1/134309 ,  G02F1/1347 ,  G02F1/1337

Abstract: A liquid crystal light control device in an embodiment according to the present invention includes a first liquid crystal cell, a second liquid crystal cell overlapping the first liquid crystal cell, a third liquid crystal cell overlapping the second liquid crystal cell, and a fourth liquid crystal cell overlapping the third liquid crystal, each of the first liquid crystal cell, the second liquid crystal cell, the third liquid crystal cell, and the fourth liquid crystal cell includes a first substrate arranged with a first electrode having a strip pattern, a second substrate arranged with a second electrode having a strip pattern, and a liquid crystal layer between the first substrate and the second substrate. The first substrate and the second substrate are arranged with a longitudinal direction of the strip pattern of the first electrode and second electrode intersecting.

公开(公告)号：US20220373831A1

公开(公告)日：2022-11-24

申请号：US17881610

申请日：2022-08-05

Applicant: Japan Display Inc.

Inventor： Takeo KOITO ,  Tae KUROKAWA ,  Masashi MITSUI

IPC: G02F1/1347 ,  G02F1/1343 ,  G02F1/1335 ,  G02F1/137

Abstract: According to one embodiment, a light control device includes a first liquid crystal cell, a second liquid crystal cell, and a polarization conversion element disposed between the first liquid crystal cell and the second liquid crystal cell. One substrate of each of the first liquid crystal cell and the second liquid crystal cell includes an insulating substrate, and first to fourth electrodes arranged on the insulating substrate and formed in a strip shape. The electric potential difference between the first electrode and the second electrode, the electric potential difference between the second electrode and the third electrode, and the electric potential difference between the third electrode and the fourth electrode are different from each other.

公开(公告)号：US20220357614A1

公开(公告)日：2022-11-10

申请号：US17870852

申请日：2022-07-22

Applicant: Japan Display Inc.

Inventor： Takeo KOITO ,  Tae KUROKAWA ,  Masashi MITSUI

IPC: G02F1/1333 ,  G02F1/1343 ,  G02F1/1347 ,  G02F1/1337 ,  G02F1/1335

Abstract: According to one embodiment, a light control device includes a first liquid crystal cell, a second liquid crystal cell and a polarized light conversion element disposed between the first liquid crystal cell and the second liquid crystal cell. One substrate of an pair of substrates of each of the first liquid crystal cell and the second liquid crystal cell includes an insulating substrate, a plurality of first electrodes arranged along one direction on the insulating substrate and formed in a strip shape, a first inorganic insulating film covering the first electrodes and a plurality of second electrodes intersecting the first electrodes on the first inorganic insulating film and formed in a strip shape.

公开(公告)号：US20220317510A1

公开(公告)日：2022-10-06

申请号：US17708524

申请日：2022-03-30

Applicant: Japan Display Inc.

Inventor： Go MIYAZAKI ,  Shuji HAYASHI ,  Takeo KOITO

IPC: G02F1/1335 ,  G02B30/26

Abstract: A display device includes a light source, a liquid crystal panel including a first sub-pixel and a second sub-pixel adjacent to the first sub-pixel in a first direction, and an optical control element including a light shielding layer. Each of the first sub-pixel and the second sub-pixel has a first width in the first direction. The light shielding layer includes an opening portion having a second width in the first direction. The second width is 1.5 times the first width. In all of light rays irradiated from the light source and transmitting through the opening portion, an angle between a first light ray transmitting through the first sub-pixel and emitted to an outside and the second light ray transmitting through the second sub-pixel and emitted to the outside is less than or equal to 2 degrees.