公开(公告)号：US11327214B2

公开(公告)日：2022-05-10

申请号：US17183959

申请日：2021-02-24

Applicant: Japan Display Inc.

Inventor： Munenori Motooka ,  Nobuyuki Suzuki

IPC: G02F1/13357 ,  F21V8/00 ,  G02F1/1335

Abstract: A liquid crystal panel includes first substrate, a second substrate overlapping the first substrate, and a liquid crystal arranged between the substrates, the first including an extended portion which does not overlaps the second substrate. A backlight unit includes a light source mounted on a wiring board, a light guide plate having a light-receiving side surface and a front light-output surface, a light shielding adhesive tape disposed between the liquid crystal panel and the wiring board, and an optical sheet overlaping the front surface of the light guide plate. The light-shielding adhesive tape overlaps the wiring board and the optical sheet.

公开(公告)号：US20200012033A1

公开(公告)日：2020-01-09

申请号：US16573264

申请日：2019-09-17

Applicant: Japan Display Inc.

Inventor： Munenori MOTOOKA ,  Nobuyuki Suzuki

IPC: F21V8/00 ,  G02F1/1335

Abstract: A backlight unit includes a light source having an emission region, a wiring board having the light source mounted thereon, a light guide plate having a side surface into which light from the light source enters, and a front surface from which the light exits, a light shielding adhesive tape adhering to the wiring board, and an optical sheet which overlaps with the front surface of the light guide plate. The front surface of the light guide plate includes an effective region serving as a planar light source and a light entering region ranging from the side surface to the effective region. The wiring board and the light-shielding adhesive tape each have a part positioned in the light entering region, and the optical sheet is arranged from the effective region to the light entering region. An end portion of the optical sheet overlaps with the light-shielding tape.

公开(公告)号：US10459143B2

公开(公告)日：2019-10-29

申请号：US16360068

申请日：2019-03-21

Applicant: Japan Display Inc.

Inventor： Munenori Motooka ,  Nobuyuki Suzuki

IPC: F21V7/04 ,  F21V8/00 ,  G02F1/1335

Abstract: A backlight unit includes a light source having an emission region, a wiring board having the light source mounted thereon, a light guide plate having a side surface into which light from the light source enters, and a front surface from which the light exits, a light shielding adhesive tape adhering to the wiring board, and an optical sheet which overlaps with the front surface of the light guide plate. The front surface of the light guide plate includes an effective region serving as a planar light source and a light entering region ranging from the side surface to the effective region. The wiring board and the light-shielding adhesive tape each have a part positioned in the light entering region, and the optical sheet is arranged from the effective region to the light entering region. An end portion of the optical sheet overlaps with the light-shielding tape.

公开(公告)号：US11934001B2

公开(公告)日：2024-03-19

申请号：US17954371

申请日：2022-09-28

Applicant: Japan Display Inc.

Inventor： Makoto Hasegawa ,  Nobuyuki Suzuki

IPC: F21V8/00 ,  G02F1/139

CPC classification number: G02B6/0053 ,  G02B6/0045 ,  G02B6/0055 ,  G02B6/0073 ,  G02F1/139

Abstract: A lighting device including: a light guide, a reflecting sheet and a first prism sheet, in which a first white LED, a second white LED and a third white LED are disposed in a same interval on a first side surface and on a second side surface, which opposes to the first side surface, a first prism array extending in a first direction and arranged in a second direction is formed on the major surface, a second prism array extending in a second direction and arranged in a first direction is formed on the back surface, the reflecting sheet is disposed under the back surface of the light guide, the first prism sheet is disposed on the major surface of the light guide, and a third prism array, extending in the second direction and arranged in the first direction is formed on the back surface of the first prism sheet.

公开(公告)号：US11815259B2

公开(公告)日：2023-11-14

申请号：US17897331

申请日：2022-08-29

Applicant: Japan Display Inc.

Inventor： Masafumi Okada ,  Nobuyuki Suzuki

IPC: F21V7/06 ,  G02F1/29 ,  F21Y115/10

CPC classification number: F21V7/06 ,  G02F1/29 ,  F21Y2115/10

Abstract: The purpose is to provide a rectangle light spot with a simple structure. The invention is: A lighting device having a funnel shaped reflector which includes a neck portion and an opening portion, in which an LED as a light source is disposed at the neck, the opening portion of the funnel shaped reflector is a circle in a plan view, provided a distance from the neck portion to the opening portion along an optical axis is h, and a diameter of the circle is d, h/d is two or larger, and a liquid crystal lens is disposed at the opening.

公开(公告)号：US11726251B2

公开(公告)日：2023-08-15

申请号：US17719476

申请日：2022-04-13

Applicant: Japan Display Inc.

Inventor： Munenori Motooka ,  Nobuyuki Suzuki

IPC: G02F1/13357 ,  F21V8/00 ,  G02F1/1335

CPC classification number: G02B6/0023 ,  G02B6/0013 ,  G02B6/0051 ,  G02B6/0053 ,  G02B6/0055 ,  G02B6/0083 ,  G02B6/0088 ,  G02F1/133615 ,  G02F1/133612

Abstract: A liquid crystal panel includes first substrate, a second substrate overlapping the first substrate, a liquid crystal arranged between the substrates, and first and second polarizing plates arranged outside from a corresponding one of the first and second substrates. A backlight unit includes a light source mounted on a wiring board, a light guide plate having a light-receiving side surface and a front light-output surface, an optical sheet arranged between the liquid crystal panel and the light guide plate, and a light shielding tape disposed between the liquid crystal panel and the optical sheet the light-shielding tape adheres to the second polarizing plate and the optical sheet.

公开(公告)号：US11442215B2

公开(公告)日：2022-09-13

申请号：US17305345

申请日：2021-07-06

Applicant: Japan Display Inc.

Inventor： Makoto Hasegawa ,  Nobuyuki Suzuki ,  Masafumi Okada

IPC: F21V8/00

Abstract: According to one embodiment, a light emitting device includes a light guide plate, a prism sheet, and a lenticular lens, wherein, a plurality of first protrusions of the light guide plate are arranged along a first direction and extend along a second direction intersecting the first direction, a plurality of second protrusions of the light guide plate extend along the first direction and are arranged along the second direction, the prism sheet includes a plurality of third protrusions extending along the first direction and arranged in the second direction, and the lenticular lens includes a plurality of fourth protrusions arranged along the first direction and extending along the second direction.

公开(公告)号：US11294223B2

公开(公告)日：2022-04-05

申请号：US17218613

申请日：2021-03-31

Applicant: Japan Display Inc.

Inventor： Makoto Hasegawa ,  Nobuyuki Suzuki ,  Masafumi Okada

IPC: G02F1/1335 ,  G02F1/03 ,  G02F1/137

Abstract: The purpose of the present invention is to realize a lighting device of thin, low power consumption and small light distribution angle. The present invention takes the following structure to realize the above task: A lighting device comprising: a disc shaped light guide, having a main surface and a rear surface, including a first hole at a center, a disc shaped reflection sheet, disposed at the rear surface side of the light guide, including a second hole at a center, a prism sheet, disposed at the main surface side of the light guide, including a concentric first prism array, wherein a reflection mirror is set in the first hole of the light guide at the side near to the prism sheet, an LED is set opposing to the reflection mirror.

公开(公告)号：US11256024B2

公开(公告)日：2022-02-22

申请号：US17219881

申请日：2021-04-01

Applicant: Japan Display Inc.

Inventor： Makoto Hasegawa ,  Nobuyuki Suzuki ,  Michihide Shibata

IPC: F21V8/00 ,  G02F1/1335

Abstract: According to one embodiment, an electronic equipment includes a liquid crystal panel, an illumination device, and a light receiving element. The illumination device includes a first light guide which includes a first opening, a first light source, a second light guide including a first area, a second area, a first main surface, a second main surface, a first side surface, a second side surface, and a continuous surface, a second light source opposed to each of the continuous surface and the second side surface, and a light reflective layer covering each of the continuous surface and the first side surface.

公开(公告)号：US10281636B2

公开(公告)日：2019-05-07

申请号：US16053041

申请日：2018-08-02

Applicant: Japan Display Inc.

Inventor： Munenori Motooka ,  Nobuyuki Suzuki

IPC: F21V7/04 ,  F21V8/00 ,  G02F1/1335

Abstract: A backlight unit includes a light source having an emission region, a wiring board having the light source mounted thereon, a light guide plate having a side surface into which light from the light source enters, and a front surface from which the light exits, a light shielding adhesive tape adhering to the wiring board, and an optical sheet which overlaps with the front surface of the light guide plate. The front surface of the light guide plate includes an effective region serving as a planar light source and a light entering region ranging from the side surface to the effective region. The wiring board and the light-shielding adhesive tape each have a part positioned in the light entering region, and the optical sheet is arranged from the effective region to the light entering region. An end portion of the optical sheet overlaps with the light-shielding tape.