公开(公告)号：US20250138312A1

公开(公告)日：2025-05-01

申请号：US18925431

申请日：2024-10-24

Applicant: Japan Display Inc.

Inventor： Kazunari TOMIZAWA ,  Chikyu NAKAOKA ,  Takeo KOITO ,  Yuta HAGA

IPC: G02B27/01

Abstract: According to an aspect, a display device includes: a backlight, first and second image display panels. The first image display panel includes: a first polarizing plate configured to transmit light polarized in a first direction and block light polarized in a direction different from the first direction; and a first color filter provided between the first polarizing plate and the second image display panel. The second image display panel includes: a second polarizing plate configured to transmit light polarized in a second direction and block light polarized in a direction different from the second direction; and a second color filter provided between at least the second polarizing plate and the first image display panel. The thickness of the first color filter is different from the thickness of the second color filter. Another polarizing plate is not provided between the first image display panel and the second image display panel.

公开(公告)号：US20250116900A1

公开(公告)日：2025-04-10

申请号：US18988096

申请日：2024-12-19

Applicant: Japan Display Inc.

Inventor： Tae KUROKAWA ,  Takeo KOITO ,  Kojiro IKEDA

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

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：US20250110335A1

公开(公告)日：2025-04-03

申请号：US18899315

申请日：2024-09-27

Applicant: Japan Display Inc.

Inventor： Kazunari TOMIZAWA ,  Chikyu NAKAOKA ,  Takeo KOITO

IPC: G02B27/01

Abstract: According to an aspect, a head-up display causes an image reflected by a light transmitting member to be superimposed on a real image transmitted by the light transmitting member and causes the superimposed image to be visually recognized as a virtual image by an viewer. The head-up display includes a display device and a magnification optical system. The display device includes a backlight, a first image display panel that receives direct light from the backlight, and a second image display panel that is disposed with a gap between the second image display panel and the first image display panel and receives light transmitted by the first image display panel. The first image display panel includes a first polarizer provided between the first image display panel and the backlight. The second image display panel includes a second polarizer provided between the second image display panel and the magnification optical system.

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：US20240255806A1

公开(公告)日：2024-08-01

申请号：US18632869

申请日：2024-04-11

Applicant: Japan Display Inc.

Inventor： Yoshihiro SAKURAI ,  Hironao TANAKA ,  Harumi OKUNO ,  Takeo KOITO

IPC: G02F1/1337 ,  G02F1/1343

CPC classification number: G02F1/1337 ,  G02F1/133707 ,  G02F1/134363 ,  G02F1/134372 ,  G02F1/133749

Abstract: A liquid crystal panel is provided and includes first and second substrates with liquid crystal layer therebetween; and first electrode in display region; second electrode disposed between first electrode and first substrate; and alignment film having alignment direction, wherein first electrode has: pair of electrode branches; slit between pair of electrode branches; first and second connections connecting pair of electrode branches; wherein first electrode has areas including first and second bent portions, main portion disposed between first and second bent portions, wherein first bent portion is adjacent to contact hole of first electrode, wherein first and second bent portions are bent relative to main portion, and wherein direction of first bent portion is substantially parallel to direction of second bent portion.

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.