公开(公告)号：US20250035991A1

公开(公告)日：2025-01-30

申请号：US18914897

申请日：2024-10-14

Applicant: Japan Display Inc.

Inventor： Kojiro IKEDA ,  Takeo KOITO

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

Abstract: An optical element includes a first liquid crystal cell, a second liquid crystal cell, a third liquid crystal cell, and a fourth liquid crystal cell arranged in this order to overlap one another. 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 plurality of first electrodes arranged in a stripe form and extending in a first extending direction, a first orientation film over the plurality of first electrodes, a liquid crystal layer over the first orientation film, a second orientation film over the liquid crystal layer, and a plurality of second electrodes located over the second orientation film, arranged in a stripe form, and extending in a second extending direction intersecting the first extending direction. More detailed structures will be explained in the specification.

公开(公告)号：US20240192570A1

公开(公告)日：2024-06-13

申请号：US18439314

申请日：2024-02-12

Applicant: Japan Display Inc.

Inventor： Takayuki IMAI ,  Kojiro IKEDA ,  Takeo KOITO

IPC: G02F1/29

CPC classification number: G02F1/29 ,  G02F2203/07

Abstract: In a method for driving an optical element including a first liquid crystal cell, the first liquid crystal cell includes a first substrate on which first and second transparent electrodes are arranged in a first direction, a second substrate on which third and fourth transparent electrodes are arranged in a second direction, and a first liquid crystal layer between the first substrate and the second substrate, and the method includes the steps of inputting a first signal to the first transparent electrode, inputting a second signal having a phase difference of π with respect to the first signal to the second transparent electrode, inputting a third signal having a phase difference of α with respect to the first signal to the third transparent electrode, and inputting a fourth signal having a phase difference of π with respect to the third signal to the fourth transparent electrode.

公开(公告)号：US20240117955A1

公开(公告)日：2024-04-11

申请号：US18517560

申请日：2023-11-22

Applicant: Japan Display Inc.

Inventor： Kojiro IKEDA ,  Takeo KOITO ,  Tae KUROKAWA ,  Keiji TAKIZAWA

IPC: F21V14/00 ,  F21V8/00 ,  G02F1/29

CPC classification number: F21V14/003 ,  G02B6/005 ,  G02F1/29

Abstract: A lighting device includes a light emitting module and an optical element including first and second liquid crystal cells. Each of the first and second liquid crystal cells includes first and second transparent electrodes extending in a first direction and third and fourth transparent electrodes extending in a second direction. The light emitting module includes a light source, a light guide plate including an end surface into which light emitted from the light source is incident and a first surface from which the light incident into the end surface is emitted, and a prism sheet disposed opposite to the first surface. The second substrate of the first liquid crystal cell and the first substrate of the second liquid crystal cell are adjacent to each other. The first surface includes a plurality of first grooves extending in a third direction intersecting the first direction and the second direction.

公开(公告)号：US20240077769A1

公开(公告)日：2024-03-07

申请号：US18506842

申请日：2023-11-10

Applicant: Japan Display Inc.

Inventor： Takeo KOITO ,  Kojiro IKEDA

IPC: G02F1/1343 ,  F21V5/02 ,  F21V5/04 ,  G02F1/13357 ,  G02F1/1347

CPC classification number: G02F1/13439 ,  F21V5/02 ,  F21V5/045 ,  G02F1/1336 ,  G02F1/1347

Abstract: A liquid crystal optical element includes a first liquid crystal cell, a second liquid crystal cell and an optical element refracting light. Each of the first liquid crystal cell and the second liquid crystal cell includes a first and a second substrate and a liquid crystal layer arranged between the first and the second substrate. The first substrate includes a first electrode group arranged alternately in parallel to a first direction with a first and a second transparent electrode, and a second electrode group arranged alternately in parallel to the first direction with a fifth and a sixth transparent. The second substrate includes a third electrode group arranged alternately in parallel to a second direction with a third and a fourth transparent electrode, and a fourth electrode group arranged alternately in parallel to a second direction with a seventh and an eighth transparent.

公开(公告)号：US20240045282A1

公开(公告)日：2024-02-08

申请号：US18367123

申请日：2023-09-12

Applicant: JAPAN DISPLAY INC.

Inventor： Kojiro IKEDA ,  Takeo KOITO ,  Koichi NAGAO ,  Shinichiro TANAKA

IPC: G02F1/1343 ,  G02F1/1337

CPC classification number: G02F1/134309 ,  G02F1/133788 ,  G02F1/133757

Abstract: According to one embodiment, a liquid crystal device includes a first liquid crystal cell and a second liquid crystal cell. The first liquid crystal cell and the second liquid crystal cell each include a first strip electrode, a second strip electrode, a third strip electrode and a fourth strip electrode. The extension direction of the first strip electrode and the second strip electrode in the first liquid crystal cell is different from the extension direction of the first strip electrode and the second strip electrode in the second liquid crystal cell. The extension direction of the first strip electrode and the second strip electrode intersects with the extension direction of the third strip electrode and the fourth strip electrode at an angle other than 90°.

公开(公告)号：US20240045237A1

公开(公告)日：2024-02-08

申请号：US18492067

申请日：2023-10-23

Applicant: Japan Display Inc.

Inventor： Takeo KOITO ,  Kojiro IKEDA ,  Tae KUROKAWA

IPC: G02F1/00 ,  G02F1/01 ,  G02F1/03

CPC classification number: G02F1/0045 ,  G02F1/0105 ,  G02F1/0316 ,  G02F1/0327

Abstract: Disclosed is a lighting device including a light source, a first liquid crystal cell over the light source, and a second liquid crystal cell over the first liquid crystal cell. The light source includes light-emitting elements arranged in a matrix shape with m rows and n columns. The first and second liquid crystal cells each include: a first substrate; first electrode groups located over the first substrate and arranged in a matrix shape with m rows and n columns; a liquid crystal layer over the first electrode groups; and a second substrate over the liquid crystal layer. In each of the first and the second liquid crystal cells, the first electrode groups each have first electrodes extending in a row direction, and the light-emitting elements in a jth row and a kth column overlaps the first electrode group located in the jth row and the kth column.

公开(公告)号：US20230418108A1

公开(公告)日：2023-12-28

申请号：US18367116

申请日：2023-09-12

Applicant: JAPAN DISPLAY INC.

Inventor： Kojiro IKEDA ,  Takeo KOITO ,  Koichi NAGAO ,  Shinichiro TANAKA

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

CPC classification number: G02F1/1337 ,  G02F2201/124 ,  G02F1/1347 ,  G02F1/134309

Abstract: According to one embodiment, a liquid crystal device includes a first liquid crystal cell and a second liquid crystal cell. The first liquid crystal cell and the second liquid crystal cell each include a first strip electrode, a second strip electrode, a third strip electrode and a fourth strip electrode. The extension direction of each of the first strip electrode and the second strip electrode in the first liquid crystal cell is different from the extension direction of each of the first strip electrode and the second strip electrode in the second liquid crystal cell. The extension direction of each of the first strip electrode and the second strip electrode is orthogonal to the extension direction of each of the third strip electrode and the fourth strip electrode.

公开(公告)号：US20230359091A1

公开(公告)日：2023-11-09

申请号：US18222154

申请日：2023-07-14

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：US20230306921A1

公开(公告)日：2023-09-28

申请号：US18198531

申请日：2023-05-17

Applicant: Japan Display Inc.

Inventor： Kojiro IKEDA ,  Kentaro OKUYAMA ,  Masaaki KABE

IPC: G09G3/36 ,  G02F1/1334

CPC classification number: G09G3/3607 ,  G02F1/1334

Abstract: A display device is provided and includes first light-transmitting substrate; second light-transmitting substrate opposed to the first light-transmitting substrate; liquid crystal layer between the first light-transmitting substrate and the second light-transmitting substrate; first electrode and a second electrode disposed so as to sandwich the liquid crystal layer; and light emitter comprising a first light emitter configured to emit light in a first color, a second light emitter configured to emit light in a second color, and a third light emitter configured to emit light in a third color, wherein first light emitter has a temperature characteristic in which a relative light intensity decreases more with increase in a heating temperature than in the case of the second light emitter and the third light emitter.

公开(公告)号：US20230133222A1

公开(公告)日：2023-05-04

申请号：US18148027

申请日：2022-12-29

Applicant: Japan Display Inc.

Inventor： Kojiro IKEDA ,  Tenfu NAKAMURA ,  Kentaro OKUYAMA

IPC: G02F1/1343 ,  G02F1/1334

Abstract: According to one embodiment, a display device includes a first substrate having a first transparent substrate and a pixel electrode, a second substrate having a second transparent substrate, a first common electrode, a second common electrode, and an insulating film disposed between the first common electrode and the second common electrode, and a liquid crystal layer. The first common electrode is disposed between the liquid crystal layer and the insulating film, and includes a first opening and a first electrode portion. The second common electrode is disposed between the insulating film and the second transparent substrate, and includes a second electrode portion overlapping the first opening.