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公开(公告)号：US12196410B2
公开(公告)日：2025-01-14
申请号：US18244545
申请日：2023-09-11
Applicant: Japan Display Inc.
Inventor： Masafumi Okada , Makoto Hasegawa , Nobuyuki Suzuki
IPC: F21V5/02 , F21V7/00 , F21V8/00 , F21Y115/10
Abstract: Disclosed is a lighting device including a light guide plate, a plurality of LEDs, a prism sheet disposed on a side toward the upper surface of the light guide plate, and a reflective sheet disposed on a side toward the lower surface of the light guide plate. The plurality of LEDs are arrayed on a side surface corresponding to a first side of the light guide plate in a first direction along the first side. The prism sheet includes a first prism array that is formed on a surface facing the light guide plate. The first prism array includes prisms that are extended in the first direction and arrayed in a second direction perpendicular to the first direction. The upper surface of the light guide plate and the prism sheet sandwich a diffusion sheet therebetween. The diffusion sheet has a haze value between 30% and 65% when measured in compliance with JIS K7361. The prisms on the first prism array have an apex angle between 55 degrees and 66 degrees.
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公开(公告)号：US11885478B2
公开(公告)日：2024-01-30
申请号：US17939408
申请日：2022-09-07
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
CPC classification number: F21V14/003 , F21V7/0033 , F21V7/06 , F21V29/763 , F21V31/04 , G02F1/137 , G02F1/133738 , G02F1/133742 , G02F1/134309 , F21Y2115/10 , G02F2201/122
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：US11668976B2
公开(公告)日：2023-06-06
申请号：US17829425
申请日：2022-06-01
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.
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公开(公告)号：US11378841B2
公开(公告)日：2022-07-05
申请号：US17220503
申请日：2021-04-01
Applicant: Japan Display Inc.
Inventor： Masafumi Okada , Nobuyuki Suzuki , Makoto Hasegawa
IPC: G09F13/04 , G02F1/13357 , G02F1/1335
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.
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公开(公告)号：US11353647B2
公开(公告)日：2022-06-07
申请号：US17493035
申请日：2021-10-04
Applicant: Japan Display Inc.
Inventor： Hiroyuki Shimokawa , Nobuyuki Suzuki
IPC: F21V8/00 , G02F1/13357
Abstract: According to one embodiment, an electronic device includes a liquid crystal panel and an illumination device. The illumination device includes a first light guide having a first opening and facing the liquid crystal panel, a first light source facing the first light guide, a second light guide provided in the first opening and having a first main surface facing the liquid crystal panel, a second main surface, and a side surface, a second light source having a light emitting surface facing the side surface, and a wavelength conversion element located between the side surface and the light emitting surface, and configured to convert a wavelength of light from the second light source.
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Patent Agency Ranking
公开(公告)号：US10962699B2
公开(公告)日：2021-03-30
申请号：US16892392
申请日：2020-06-04
Applicant: Japan Display Inc.
Inventor： Munenori Motooka , Nobuyuki Suzuki
IPC: F21V7/04 , 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.
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公开(公告)号：US10705277B2
公开(公告)日：2020-07-07
申请号：US16573264
申请日：2019-09-17
Applicant: Japan Display Inc.
Inventor： Munenori Motooka , Nobuyuki Suzuki
IPC: F21V7/04 , 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.
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公开(公告)号：US09568667B2
公开(公告)日：2017-02-14
申请号：US14499509
申请日：2014-09-29
Applicant: Japan Display Inc.
Inventor： Munenori Motooka , Nobuyuki Suzuki
IPC: F21V7/04 , 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.
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。
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公开(公告)号：US12099273B2
公开(公告)日：2024-09-24
申请号：US18331963
申请日：2023-06-09
Applicant: Japan Display Inc.
Inventor： Makoto Hasegawa , Nobuyuki Suzuki , Masafumi Okada
IPC: G02F1/13357 , F21S2/00 , G02F1/1337 , G02F1/1343 , 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.
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公开(公告)号：US12018831B2
公开(公告)日：2024-06-25
申请号：US18116878
申请日：2023-03-03
Applicant: Japan Display Inc.
Inventor： Masafumi Okada , Nobuyuki Suzuki , Makoto Hasegawa
Abstract: The purpose is to realize a lighting device of thin, small light distribution angle, and less leak light. Further, the purpose is to realize a lighting device which can control light beam accurately with liquid crystal lenses. The structure of the invention is as follows. A lighting device including: a reflector cylinder including a mirror thereinside; and a liquid crystal lens assembly that is disposed at a light emitting surface of the reflector cylinder and includes a plurality of liquid crystal lenses being stacked, in which the liquid crystal lens assembly includes a light shading film which defines a light emitting area of the liquid crystal lens assembly and which is formed in parallel with the light emitting surface of the reflector cylinder.
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