公开(公告)号：US11105972B2

公开(公告)日：2021-08-31

申请号：US16305418

申请日：2017-08-07

Applicant: Sharp Kabushiki Kaisha

Inventor： Youzou Kyoukane ,  Hisashi Watanabe ,  Hirotoshi Yasunaga ,  Ryuzo Yuki

IPC: F21V8/00 ,  H05K1/02

Abstract: The light input efficiency of a light-emitting device into a circular disc-shaped or elliptical disc-shaped light guide plate is increased. A light-emitting device includes a first light-emitting unit (12a) that includes a plurality of light-emitting elements (L1 to L5) arranged curvilinearly, a second light-emitting unit (12b) that includes a plurality of light-emitting elements (L6 to L10) arranged curvilinearly, and a coupling portion (12c) that is disposed so as to coincide with a region (SA) sandwiched by the first and second light-emitting units and couples the first and second light-emitting units.

公开(公告)号：US10976619B2

公开(公告)日：2021-04-13

申请号：US16666229

申请日：2019-10-28

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Hisashi Watanabe ,  Hirotoshi Yasunaga ,  Youzou Kyoukane ,  Takeshi Masuda

IPC: G02F1/1362 ,  G02F1/13357

Abstract: A backlight device (illumination device) is provided with LEDs (light sources) and a light-controlling sheet (light-controlling member) that is arranged at the exit side of the outgoing-light path of the LEDs. The light-controlling sheet has a light-transmitting layer that transmits light, first light-shielding sections that are arranged at the LED side of the light-transmitting layer, and a second light-shielding section that is arranged at the opposite side to the first light-shielding section side of the light-transmitting layer. The first light-shielding sections and the second light-shielding section are repeatedly arranged side-by-side in an alternating manner.

公开(公告)号：US10852583B2

公开(公告)日：2020-12-01

申请号：US16567305

申请日：2019-09-11

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Hisashi Watanabe ,  Hirotoshi Yasunaga ,  Youzou Kyoukane ,  Takeshi Masuda

IPC: G02F1/13357 ,  F21V8/00

Abstract: A lighting device includes light sources, a light source substrate, and a reflection sheet. The light source substrate includes a plate-shaped base including a mounting surface on which mounting portions are formed. The light sources are mounted on the mounting portions with solders. The reflection sheet includes an insulating sheet, a reflection layer, and holes. The reflection layer includes a metal thin film stacked on the insulating sheet. The holes are drilled through the reflection layer and the insulating sheet at positions corresponding to the light sources so that the light sources are exposed through the holes. The light source substrate and the reflection sheet are bonded together with an adhesive layer. The insulating sheet is made of a material having a heat resistance higher than a melting temperature of the solders and an elastic modulus lower than that of the base of the light source substrate.

公开(公告)号：US10670917B2

公开(公告)日：2020-06-02

申请号：US15765495

申请日：2016-09-28

Applicant: Sharp Kabushiki Kaisha

Inventor： Hirotoshi Yasunaga ,  Mitsuhiro Murata ,  Hisashi Watanabe ,  Ryuzo Yuki

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

Abstract: A lighting device includes LEDs, a light guide plate, and a frame. The light guide plate includes a light guide plate hole portion passing through in a thickness direction, a light entering surface, and a light exiting surface. The frame surrounds the light guide plate. The frame includes an outer peripheral wall portion and an inner peripheral wall portion. The outer peripheral wall portion opposes an outer peripheral end face of the light guide plate. The inner peripheral wall portion inserted to the light guide plate hole portion opposes an inner peripheral end face of the light guide plate on an inner side of the light guide plate hole portion. The inner peripheral wall portion has a configuration in which the opposing surface has a lower light reflectivity than that of an opposing surface of the outer peripheral wall portion.

公开(公告)号：US11994767B2

公开(公告)日：2024-05-28

申请号：US18127520

申请日：2023-03-28

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Hirotoshi Yasunaga ,  Takeshi Masuda ,  Hisashi Watanabe ,  Youzou Kyoukane

IPC: G02F1/13357 ,  G02F1/1335 ,  H01L33/50

CPC classification number: G02F1/133603 ,  G02F1/133607 ,  H01L33/504 ,  H01L33/505

Abstract: A lighting device includes a plurality of light sources arranged side by side in a plane and a wavelength conversion sheet arranged to face a light emitting surface of each of the light sources and converting a wavelength of light from the light sources, in which the wavelength conversion sheet includes a base material having transparency, and a wavelength conversion layer in which a plurality of protrusions containing a wavelength conversion material and having a spherical surface are arranged side by side without gaps on a principal surface of the base material opposite to the light sources.

公开(公告)号：US11502234B2

公开(公告)日：2022-11-15

申请号：US17193444

申请日：2021-03-05

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Hisashi Watanabe ,  Hirotoshi Yasunaga ,  Youzou Kyoukane ,  Takeshi Masuda

IPC: H01L33/62 ,  G02F1/13357 ,  H01L33/56 ,  H01L33/54

Abstract: A light-emitting-element-equipped substrate includes: a circuit substrate including a main surface; a light-emitting element mounted on the main surface and electrically connected to the circuit substrate; a silicone-based white resist layer covering the main surface and including: a first opening surrounding the light-emitting element; and a second opening different from the first opening; and a transparent protective layer covering the light-emitting element, the silicone-based white resist layer, and the second opening.

公开(公告)号：US10754196B2

公开(公告)日：2020-08-25

申请号：US16255637

申请日：2019-01-23

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Hisashi Watanabe ,  Hirotoshi Yasunaga ,  Youzou Kyoukane

IPC: G02F1/13357

Abstract: A lighting device includes a reflector including a unit light source region, a light reflecting portion, and a light transmissive portion. The unit light source region includes a light source overlapping region and a light source peripheral region. The light reflecting portion is included in the unit light source region and has a higher area ratio in the light source overlapping region than in the light source peripheral region. The light transmissive portion is included in the unit light source region and has a higher area ratio in the light source peripheral region than in the light source overlapping region. The unit light source region includes unit regions arranged to cover a plane surface of the unit light source region and the light reflecting portion and the light transmissive portion are allocated to the unit regions to have a non-point-symmetric distribution in the unit light source region.

公开(公告)号：US10754195B2

公开(公告)日：2020-08-25

申请号：US16240627

申请日：2019-01-04

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Hirotoshi Yasunaga ,  Hisashi Watanabe ,  Youzou Kyoukane

IPC: G02F1/13357

Abstract: The lighting device includes a light source, a light transmissive plate opposed to the light source, a light reflecting portion disposed on the light transmissive plate and providing at least transmitted light with a specific tint, and a coloring portion disposed on the light source and/or the light transmissive plate. The light transmissive plate includes a light source overlapping region and a light source peripheral region. The light reflecting portion is disposed with a higher distribution density in the light source overlapping region than in the light source peripheral region. The coloring portion colors light travelling from the light source toward the light source overlapping region with a tint having a complementary relationship with the specific tint, or colors light travelling from the light source toward the light source peripheral region with a tint having a corresponding or similar color relationship with the specific tint.

公开(公告)号：US10705375B2

公开(公告)日：2020-07-07

申请号：US15770740

申请日：2016-10-21

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Hisashi Watanabe ,  Hirotoshi Yasunaga ,  Ryuzo Yuki ,  Mitsuhiro Murata

IPC: G02F1/13357 ,  F21V8/00

Abstract: A backlight unit includes side emitting-type LEDs, a light guide plate, and an LED board. The light guide plate includes a light entering end surface, a light exiting plate surface, and an opposite plate surface. The LED board includes a plate surface attached to an edge of the opposite plate surface of the light guide plate. A gap is present between light emitting surfaces of the LEDs and the light entering end surface of the light guide plate. Each LED includes a light emitting surface having a dimension in the thickness direction of the light guide plate smaller than a dimension of the light entering end surface in the thickness direction. Each LED is disposed such that the center of the light emitting surface is opposed to the center of the light entering end surface.

公开(公告)号：US10656464B2

公开(公告)日：2020-05-19

申请号：US16289930

申请日：2019-03-01

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Hisashi Watanabe ,  Hirotoshi Yasunaga ,  Youzou Kyoukane

IPC: G02F1/133 ,  G02F1/13357

Abstract: A lighting device (1) includes a substrate (2), a light source arranged on a surface of the substrate (2), and a light diffusing member (4) configured to diffuse light emitted from the light source. The light diffusing member (4) is composed of a sheet base or a film base having a light-diffusing resin layer, and a projection (41) that protrudes in a direction of the substrate (2) and that is integrated with the sheet base or the film base.