公开(公告)号：US12282224B2

公开(公告)日：2025-04-22

申请号：US18796391

申请日：2024-08-07

Applicant: Japan Display Inc.

Inventor： Takashi Ota ,  Michihide Shibata ,  Nobuyuki Suzuki ,  Masafumi Okada

IPC: G02F1/1335 ,  G02F1/13357

Abstract: A backlight includes: a light source capable of emitting light spreading in first and second directions perpendicular to each other, from an optical axis; a first cylindrical lens that refracts and brings the light closer along the first direction to the optical axis, the first cylindrical lens overlapping with the light source in a third direction perpendicular to the first and second directions; a second cylindrical lens that refracts and brings the light even closer along the first direction to the optical axis, the second cylindrical lens overlapping with the light source and the first cylindrical lens in the third direction; and a reflector that reflects and brings the light closer along the second direction to the optical axis, the reflector being positioned between the first cylindrical lens and the second cylindrical lens in the third direction, the reflector avoiding overlap with the light source.

公开(公告)号：US12248167B2

公开(公告)日：2025-03-11

申请号：US18631044

申请日：2024-04-10

Applicant: Japan Display Inc.

Inventor： Makoto Hasegawa ,  Nobuyuki Suzuki ,  Masafumi Okada

IPC: F21V8/00

Abstract: According to one embodiment, in an illumination device, a second light guide includes a plurality of fourth projecting portions provided in a first area of a fifth main surface opposing a prism sheet, a plurality of fifth projecting portions provided in a second area of a fifth main surface, and a plurality of sixth projecting portions on a sixth main surface opposing the fifth main surface, cross-sectional shapes of the fourth projecting portions and the fifth projecting portions are scalene triangles, and the fourth projecting portions and the fifth projecting portions are arranged in respective positions line-symmetrical position with respect to each other in plan view.

公开(公告)号：US12164188B2

公开(公告)日：2024-12-10

申请号：US17873310

申请日：2022-07-26

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.

公开(公告)号：US12013610B2

公开(公告)日：2024-06-18

申请号：US18307059

申请日：2023-04-26

Applicant: Japan Display Inc.

Inventor： Masafumi Okada ,  Nobuyuki Suzuki ,  Makoto Hasegawa

IPC: G02F1/13357 ,  G02F1/1335

CPC classification number: G02F1/133603 ,  G02F1/133526 ,  G02F1/133607

Abstract: According to one embodiment, a light emitting device includes a light guide plate with a plurality of first protrusion parts arranged along a first direction and extending along a second direction which crosses the first direction, and a prism sheet, wherein a cross-sectional shape of each of the first protrusion parts along the first direction has an apex angle between 55 degrees and 65 degrees, inclusive, the light guide plate includes a plurality of second protrusion parts which extend along the first direction and are arranged along the second direction, and a cross-sectional shape of each of the second protrusion parts along the second direction has a base angle between 1 degree and 3 degrees, inclusive.

公开(公告)号：US11747670B2

公开(公告)日：2023-09-05

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

CPC classification number: G02F1/133526 ,  G02F1/0316 ,  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：US11703710B2

公开(公告)日：2023-07-18

申请号：US17954331

申请日：2022-09-28

Applicant: Japan Display Inc.

Inventor： Makoto Hasegawa ,  Nobuyuki Suzuki ,  Masafumi Okada

IPC: G02F1/13357 ,  G02F1/1337 ,  G02F1/1343 ,  F21S2/00 ,  F21Y115/10

CPC classification number: G02F1/1336 ,  F21S2/00 ,  G02F1/1337 ,  G02F1/134309 ,  F21Y2115/10

Abstract: The purpose of the present invention is to realize a lighting device of thin, low power consumption and high emitting efficiency. A concrete structure of the inventions is as follows. A lighting device including a first light guide and a second light guide stacked on the first light guide, a reflecting sheet disposed under the first light guide, and a prism sheet disposed on the first light guide, in which a concentric first prism array is formed on the prism sheet, a plurality of first LEDs are disposed along a circumferential direction of a side wall of a first hole of the first light guide, a plurality of second LEDs are disposed along a circumferential direction of a side wall of a second hole of the second light guide, and the plurality of the first LEDs and the plurality of the second LEDs are displaced in azimuth direction.

公开(公告)号：US11466840B2

公开(公告)日：2022-10-11

申请号：US17226144

申请日：2021-04-09

Applicant: Japan Display Inc.

Inventor： Makoto Hasegawa ,  Nobuyuki Suzuki ,  Ken Kagabu

IPC: F21V14/00 ,  F21V7/06 ,  G02F1/1337 ,  G02F1/1343 ,  F21V31/04 ,  G02F1/137 ,  F21V7/00 ,  F21V29/76 ,  F21Y115/10

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 having an emitting surface and a bottom opposing to the emitting surface including: a resin, set between the emitting surface and the bottom, having a hole at a center, a reflection block set in the hole at a side of the emitting surface, an LED, which is a light source, set in the hole at a side of the bottom, a space between the LED and the reflection block, in which the resin is contained in a container whose inner surface is a reflecting surface.

公开(公告)号：US10067282B2

公开(公告)日：2018-09-04

申请号：US15725602

申请日：2017-10-05

Applicant: Japan Display Inc.

Inventor： Munenori Motooka ,  Nobuyuki Suzuki

IPC: F21V7/04 ,  F21V8/00

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：US20150016145A1

公开(公告)日：2015-01-15

申请号：US14499509

申请日：2014-09-29

Applicant: Japan Display Inc.

Inventor： Munenori Motooka ,  Nobuyuki Suzuki

IPC: F21V8/00

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.

Abstract translation: 背光单元包括具有发射区域的光源，安装有光源的布线板，具有来自光源的光入射的侧表面的光导板和光从该表面射出的前表面， 粘接在布线板上的遮光胶带以及与导光板前表面重叠的光学片。 导光板的前表面包括用作平面光源的有效区域和从侧面到有效区域的光进入区域。 布线板和遮光胶带各自具有位于光入射区域中的部分，并且光学片从有效区域布置到光入射区域。 光学片的端部与遮光带重叠。