# US 12,000,582 B2 · Display device having reflecting sheet with plurality of dot areas reducing reflectivity of the reflecting sheet

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- Number: US 12,000,582 B2
- Document ID: US12000582B2
- Status: Granted
- Kind: B2
- Application number: 18/086,935
- Filed: 2022-12-22
- Published: 2023-04-20
- Granted: 2024-06-04
- Earliest claimed: 2014-10-31
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Sewon Oh; Eunseok Kim
- Web page: https://patentgrep.com/patent/US12000582B2

## CPC

- F21V 7/0066: {specially adapted to cooperate with point like light sources; specially adapted to cooperate with light sources the shape of which is unspecified (F21V7/16 - F21V7/30 take precedence)}
- G02F 1/133603: {with LEDs}
- G02F 1/133605: {including specially adapted reflectors}
- G02F 1/133607: {the light controlling member including light directing or refracting elements, e.g. prisms or lenses}
- G02F 1/133611: {including means for improving the brightness uniformity}
- F21Y 2105/10: comprising a two-dimensional [2D] array of point-like light-generating elements
- F21Y 2115/10: Light-emitting diodes [LED]
- G02F 1/133606: {including a specially adapted diffusing, scattering or light controlling members}
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- 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
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

A display device including a display panel; a frame at a rear of the display panel; a light source on a substrate between the display panel and the frame, the light source providing light for the display panel; and a reflecting sheet between the display panel and the frame, the reflecting sheet having a rectangular shape with a first long side, a second long side opposite the first long side, a first short side adjacent to the first long side and the second long side, and a second short side opposite the first short side, wherein the reflecting sheet includes a first sheet part forming a central area of the reflecting sheet; a second sheet part forming a side area of the reflecting sheet around the first sheet part, the second sheet part including dot areas; and a hole next to a border line between the first sheet part and the second sheet part, wherein at least one of the dot areas in the second sheet part is formed along the first short side or the second short side, wherein the at least one of the dot areas including a first dot area next to the hole in a parallel direction of the first long side or the second long side and a second dot area next to the first dot area in a parallel direction of the first short side or the second short side, and wherein a density of dots in the first dot area is different from a density of dots in the second dot area.

## Claims

### Claim 1

A display device comprising:
a display panel;
a frame at a rear of the display panel;
a light source on a substrate between the display panel and the frame, the light source providing light for the display panel; and
a reflecting sheet between the display panel and the frame, the reflecting sheet having a rectangular shape with a first long side, a second long side opposite the first long side, a first short side adjacent to the first long side and the second long side, and a second short side opposite the first short side, wherein the reflecting sheet includes:
a first sheet part forming a central area of the reflecting sheet;
a second sheet part forming a side area of the reflecting sheet around the first sheet part, inclined with respect to the first sheet part, the second sheet part including dot areas; and
a through hole close to a border line between the first sheet part and the second sheet part,
wherein at least one of the dot areas in the second sheet part is formed along the first short side or the second short side,
wherein the at least one of the dot areas including a first dot area close to the through hole in a parallel direction of the first long side or the second long side and a second dot area next to the first dot area in a parallel direction of the first short side or the second short side,
wherein a size of the dots in the first dot area is smaller than a size of the dots in the second dot area, and
wherein the first dot area and the second dot area are defined by all of the same size dots next to each other.

### Claim 2 (depends on 1)

The display device of claim 1, wherein the substrate extends in the first long side or the second long side of the reflecting sheet,
wherein a third dot area is next to the first dot area, the third dot area opposite to the through hole with respect to the first dot area such that the third dot area is arranged in series with a length direction of the substrate, and
wherein a size of dots in the third dot area is greater than the size of the dots in the first dot area.

### Claim 3 (depends on 2)

The display device of claim 2, wherein a density of the dots in the third dot area is greater than a density of the dots in the first dot area.

### Claim 4 (depends on 2)

The display device of claim 2, wherein the size of the dots in the third dot area is smaller than the size of the dots in the second dot area.

### Claim 5 (depends on 2)

The display device of claim 2, wherein a density of the dots in the third dot area is smaller than a density of the dots in the second dot area.

### Claim 6 (depends on 1)

The display device of claim 1, wherein the substrate is aligned with the through hole of the reflecting sheet.

### Claim 7 (depends on 1)

The display device of claim 1, further comprising a fixing pin coupled to the frame, wherein the fixing pin fixes the reflecting sheet to the frame.

### Claim 8 (depends on 1)

The display device of claim 1, wherein the reflecting sheet further comprises a plurality of circled dot areas in the first sheet part, and
wherein each of the plurality of circled dot areas includes a plurality of rows with circled dots.

### Claim 9 (depends on 8)

The display device of claim 8, wherein a color of the plurality of circled dot areas is darker than a color of the reflecting sheet.

### Claim 10 (depends on 1)

The display device of claim 1, wherein the reflecting sheet further comprises a plurality of fan shaped dot areas in the first sheet part, and
wherein each of the plurality of fan shaped dot areas faces the first long side or the second long side of the reflecting sheet part.

### Claim 11 (depends on 10)

The display device of claim 10, wherein the plurality of fan shaped dot areas is disposed between the substrate and the first long side or the substrate and the second long side of the reflecting sheet.

### Claim 12 (depends on 1)

The display device of claim 1, wherein the first dot areas and the second dot areas are aligned parallel along at least one of the first long side, the second long side, the first short side the second short side opposite the first short side of the reflecting sheet.

### Claim 13 (depends on 1)

The display device of claim 1, wherein the first dot areas and the second dot areas are disposed side-by-side along at least one of the first long side, the second long side, the first short side the second short side opposite the first short side of the reflecting sheet.

### Claim 14 (depends on 1)

The display device of claim 1, wherein the second dot area is disposed orthogonally adjacent and between the first dot areas.

### Claim 15 (depends on 1)

The display device of claim 1, wherein the second dot area is a non-diagonally adjacent area to the first dot areas.

### Claim 16 (depends on 1)

The display device of claim 1, wherein a central axis of the first dot area is in parallel with at least one of the first short side and/or the second short side opposite the first short side of the reflecting sheet, and
wherein the central axis passes through the second dot area.

### Claim 17

A display device comprising:
a display panel;
a frame at a rear of the display panel;
a plurality of light sources on a substrate between the display panel and the frame, each light source including a lens; and
a reflecting sheet between the display panel and the frame, the reflecting sheet having a rectangular shape with a first long side, a second long side opposite the first long side, a first short side adjacent to the first long side and the second long side, and a second short side opposite the first short side,
wherein the reflecting sheet includes:
a first sheet part forming a central area of the reflecting sheet; and
a second sheet part forming a side area of the reflecting sheet around the first sheet part, the second sheet part including dot areas,
wherein the dot areas in the second sheet part are formed along the first short side or the second short side and include a plurality of first dot areas respectively aligned with the plurality of light sources, and a plurality of second dot areas respectively between the plurality of first dot areas,
wherein a density of dots in the first dot areas increases towards an outside edge of the reflecting sheet, and
wherein a size of the dots in the first dot areas is smaller than a size of the dots in the second dot areas.

### Claim 18 (depends on 17)

The display device of claim 17, wherein the first dot areas respectively aligned with the plurality of light sources include an inner first dot area and an outer first dot area adjacent to the inner first dot area, and
wherein the inner first dot area is closer to a border line between the first sheet part and the second sheet part than the outer first dot area.

### Claim 19 (depends on 18)

The display device of claim 18, wherein the size of the dots in the inner first dot area are the same.

### Claim 20 (depends on 19)

The display device of claim 19, wherein the size of the dots in the outer first dot area is the same.

### Claim 21 (depends on 20)

The display device of claim 20, wherein the size of the dots in the inner first dot area is different than the size of the dots in the outer first dot area.

### Claim 22 (depends on 21)

The display device of claim 21, wherein the size of dots in the inner first dot area is smaller than the size of dots in the outer first dot area.

### Claim 23 (depends on 18)

The display device of claim 18, wherein a density of dots in the outer first dot area is greater than a density of dots in the inner first dot area.