# US 10,871,610 B2 · Lighting device and display device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,871,610 B2
- Document ID: US10871610B2
- Status: Granted
- Kind: B2
- Application number: 16/802,955
- Filed: 2020-02-27
- Published: 2020-09-03
- Granted: 2020-12-22
- Earliest claimed: 2019-03-01
- Assignees: Sharp Kabushiki Kaisha
- Applicants: Sharp Kabushiki Kaisha
- Inventors: Tsuyoshi Miyata
- Web page: https://patentgrep.com/patent/US10871610B2

## CPC

- G02B 6/0088: {of the light guide or other optical sheets in the package}
- G02F 1/133603: {with LEDs}
- G02F 1/133605: {including specially adapted reflectors}
- G02F 1/133606: {including a specially adapted diffusing, scattering or light controlling members}
- G02F 1/133615: {Edge-illuminating devices, i.e. illuminating from the side}
- G02B 6/0033: {Means for improving the coupling-out of light from the light guide}
- G02B 6/0055: {Reflecting element, sheet or layer}
- G02B 6/0068: {Arrangements of plural sources, e.g. multi-colour light sources}
- G02B 6/009: {of the light source in the package (G02B6/0021 takes precedence)}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

A lighting device includes: a light source; a plate-like optical member on which light from the light source falls; an optical sheet that imparts an optical effect to light emitted from the optical member; and an accommodating member that surrounds outer peripheral edges of the optical member and outer peripheral edges of the optical sheet. The optical sheet has a body part having a polygonal shape, extension portions provided on side portions of the body part and placed between the outer peripheral edges of the optical member and the chassis, and curtain portions, provided in corner portions of the body part, each of which connects the extension portions provided on adjacent ones of the side portions, and the extension portions and the curtain portions are provided with folds, respectively.

## Claims

### Claim 1

A lighting device comprising:
a light source;
a plate-like optical member on which light from the light source emits to;
an optical sheet that imparts an optical effect to light emitted from the optical member; and
an accommodating member that surrounds outer peripheral edges of the optical member and outer peripheral edges of the optical sheet,
wherein the optical sheet has a body part having a polygonal shape, extension portions provided on side portions of the body part and placed between the outer peripheral edges of the optical member and the accommodating member, and curtain portions, provided in corner portions of the body part, each of which connects the extension portions provided on adjacent ones of the side portions, and
the extension portions and the curtain portions are provided with folds, respectively.

### Claim 2 (depends on 1)

The lighting device according to claim 1, wherein the body part, the extension portions, and the curtain portions are formed by a single sheet member.

### Claim 3 (depends on 1)

The lighting device according to claim 1, wherein each of the extension portions is provided so as to extend in a predetermined direction from a corresponding one of the side portions and provided with a fold that crosses the direction of extension.

### Claim 4 (depends on 1)

The lighting device according to claim 1, wherein the optical member is a light-guiding plate having an entrance end face which is a portion of the outer peripheral edges of the optical member and on which the light from the light source emits to and a light exit plate surface which is either of a pair of plate surfaces and through which the light is emitted, and
the extension portions are provided for each separate one of the side portions excluding the side portion facing the entrance end face of the light-guiding plate.

### Claim 5 (depends on 1)

The lighting device according to claim 1, wherein the optical member is a diffusion plate having a light entrance face which is a first one of a pair of plate surfaces on which the light from the light source emits to and a light exit surface which is a second one of the pair of plate surfaces and through which the light is emitted, and
the extension portions are provided for each separate one of all of the side portions.

### Claim 6 (depends on 1)

A display device comprising:
the lighting device according to claim 1; and
a display panel that displays an image with light emitted from the lighting device.