公开(公告)号：US20220003916A1

公开(公告)日：2022-01-06

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：US20210318575A1

公开(公告)日：2021-10-14

申请号：US17218613

申请日：2021-03-31

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Nobuyuki SUZUKI ,  Masafumi OKADA

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

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：US20250020311A1

公开(公告)日：2025-01-16

申请号：US18765444

申请日：2024-07-08

Applicant: Japan Display Inc.

Inventor： Masafumi OKADA ,  Nobuyuki SUZUKI ,  Makoto HASEGAWA

IPC: F21V7/00 ,  G02B27/30

Abstract: A lighting device includes a light source capable of emitting light and a collimator lens. The collimator lens has a recess facing the light source. The recess includes an interior surface. The interior surface includes a bottom surface smaller than an opening. The interior surface includes an inner side surface tapering toward the bottom surface. The inner side surface is generated by rotating a straight line around an optical axis of the light. The straight line is inclined at an angle of at least 10 degrees and at most 20 degrees with respect to the optical axis. The light enters the bottom surface at a light distribution angle of only three degrees or less with respect to the optical axis, and enters the inner side surface at a light distribution angle of more than three degrees with respect to the optical axis.

公开(公告)号：US20240337787A1

公开(公告)日：2024-10-10

申请号：US18732671

申请日：2024-06-04

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Nobuyuki SUZUKI ,  Masafumi OKADA

IPC: F21V8/00

CPC classification number: G02B6/0076 ,  G02B6/0036 ,  G02B6/0091

Abstract: According to one embodiment, in an illumination device, a plurality of first projection portions and a plurality of second projection portions are provided in a second area of a first light guide, a thickness of the first light guide becomes less as a location thereof which is further away from a first side surface and closer to a first central portion, a plurality of third projection portions and a plurality of fourth projection portions are provided in a third area of a second light guide, and the third area has a constant thickness and a fourth area of the second light guide is a recess portion.

公开(公告)号：US20240117954A1

公开(公告)日：2024-04-11

申请号：US18378807

申请日：2023-10-11

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Nobuyuki SUZUKI ,  Takeo KOITO

IPC: F21V14/00 ,  F21V7/00 ,  F21V7/06 ,  G02F1/1335 ,  G02F1/1343 ,  G02F1/1347 ,  G02F1/29

CPC classification number: F21V14/003 ,  F21V7/0016 ,  F21V7/06 ,  G02F1/133528 ,  G02F1/134309 ,  G02F1/1347 ,  G02F1/294

Abstract: A lighting device, comprises: a first reflector that includes a first hole where a light source is disposed, a second hole that emits light, and a reflection curved surface that connects the first hole and the second hole to each other, and the first reflector emits light to a first direction; a liquid crystal lens disposed to cover the second hole of the first reflector; and a polygonal pyramid including a bottom surface and a plurality of inclined surfaces, and being disposed so that the plurality of inclined surfaces oppose the liquid crystal lens. The plurality of inclined surfaces are reflection surfaces, and on the reflection surfaces, a traveling path of the light traveling to the first direction changes to a second direction. The liquid crystal lens can configure lenses corresponding to the plurality of inclined surfaces.

公开(公告)号：US20230258304A1

公开(公告)日：2023-08-17

申请号：US18136881

申请日：2023-04-20

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Takeo KOITO ,  Nobuyuki SUZUKI ,  Masafumi OKADA

IPC: F21K9/233 ,  F21K9/61 ,  F21V8/00 ,  F21V11/06 ,  F21V14/00 ,  F21V5/00

CPC classification number: F21K9/233 ,  F21K9/61 ,  G02B6/0053 ,  G02B6/003 ,  F21V11/06 ,  F21V14/003 ,  F21V5/005 ,  F21Y2115/10

Abstract: The purpose of the present invention is to realize a lighting device of small light distribution angle and less leakage light and further to realize a lighting device in which the light beam is easy to control. The following is an example of the structure to meet the above purpose. A lighting device including: a light guide; LEDs set at a side surface of the light guide; a prism sheet set on a major surface of the light guide, in which a first louver which extends in a first direction and, a second louver which extends in an orthogonal direction to the first direction are superposed on the prism sheet.

公开(公告)号：US20230087920A1

公开(公告)日：2023-03-23

申请号：US18070820

申请日：2022-11-29

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：US20220236471A1

公开(公告)日：2022-07-28

申请号：US17719476

申请日：2022-04-13

Applicant: Japan Display Inc.

Inventor： Munenori MOTOOKA ,  Nobuyuki SUZUKI

IPC: F21V8/00 ,  G02F1/13357

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：US20190219755A1

公开(公告)日：2019-07-18

申请号：US16360068

申请日：2019-03-21

Applicant: Japan Display Inc.

Inventor： Munenori MOTOOKA ,  Nobuyuki SUZUKI

IPC: F21V8/00 ,  G02F1/1335

CPC classification number: G02B6/0023 ,  G02B6/0013 ,  G02B6/0051 ,  G02B6/0053 ,  G02B6/0055 ,  G02B6/0083 ,  G02B6/0088 ,  G02F1/133615 ,  G02F2001/133612

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：US20250060626A1

公开(公告)日：2025-02-20

申请号：US18935897

申请日：2024-11-04

Applicant: Japan Display Inc.

Inventor： Yoshiro AOKI ,  Akio TAKIMOTO ,  Nobuyuki SUZUKI ,  Yoshiomi YOSHII ,  Hirondo NAKATOGAWA

IPC: G02F1/1335 ,  F21V8/00 ,  G02F1/1343 ,  H04M1/02 ,  H04N23/57

Abstract: According to one embodiment, an electronic device includes a liquid crystal panel and a camera. The liquid crystal panel includes a display area, an incident light control area, and an emitted light control area. The camera includes a light-entering surface and a light source. The liquid crystal panel is configured to selectively transmit visible light emitted from the light source in the emitted light control area and to selectively transmit visible light from outside in order to cause visible light to enter the camera from the outside in the incident light control area.