IP Library › Granted Patent US 10,656,464
Granted Patent B2
US 10,656,464 · App. 16/289,930 · Granted May 19, 2020

Lighting device and display device

Inventors: Hisashi Watanabe (Sakai, JP); Hirotoshi Yasunaga (Sakai, JP); Youzou Kyoukane (Sakai, JP)
Assignee: SHARP KABUSHIKI KAISHA
G02F1/133611G02F1/133603G02F1/133605G02F1/133606
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 10,656,464
App. No.
16/289,930
Granted
May 19, 2020
Kind
B2
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.

Claims (23)

1. A lighting device comprising a substrate, a light source provided on a surface of the substrate, and a light diffusing member configured to diffuse light emitted from the light source,

wherein the light diffusing member comprises a sheet base or a film base having a light-diffusing resin layer, and at least one projection that protrudes in a direction of the substrate and that is integrated with the sheet base or the film base,

further comprising a plate-like reflective member provided between the light source and the light diffusing member,

wherein the reflective member comprises a reflection part configured to reflect the light emitted from the light source, and a transmission part configured to transmit the light emitted from the light source, and

wherein the reflection part occupies a greater proportion of the reflective member than the transmission part, in an area closer to a spot above the light source.

2. The lighting device according to claim 1 ,

wherein the light diffusing member is provided such that the projection is positioned above either of the reflection part or the transmission part.

3. The lighting device according to claim 1 ,

wherein a strut member is provided upright on the substrate, and

wherein the reflective member is supported by the strut member.

4. The lighting device according to claim 3 ,

wherein the light diffusing member is provided such that the projection is positioned above the strut member.

5. The lighting device according to claim 1 ,

wherein the light diffusing member comprises a plurality of projections.

6. The lighting device according to claim 1 ,

wherein the projection is a rib-like projection extending in a predetermined direction of the light diffusing member.

7. The lighting device according to claim 6 ,

wherein the projection comprises a plurality of projections that extend in different directions and that intersect with each other at an intersection, and

wherein a strut member is provided upright on the substrate, and

wherein the light diffusing member is provided such that the intersection is positioned above the strut member.

8. The lighting device according to claim 1 ,

wherein the projection protrudes by 1 to 5 mm.

9. A display device comprising a display panel and a lighting device according to claim 1 configured to emit light from behind the display panel.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 1, 2019
From: WATANABE, HISASHI; YASUNAGA, HIROTOSHI; KYOUKANE, YOUZOU
To: SHARP KABUSHIKI KAISHA
Reel/Frame 048478/0915 →
Priority Claims (1)
JP 2018-036916 · Mar 1, 2018 · national
Continuity (1)
Related Publication 20190271884A1 · Sep 5, 2019