# US 2019/0317367 A1 · Backlight unit and display device having the same

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- Number: US 2019/0317367 A1
- Document ID: US20190317367A1
- Status: Published application
- Kind: A1
- Application number: 16/380,807
- Filed: 2019-04-10
- Published: 2019-10-17
- Earliest claimed: 2018-04-16
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Seung Pyo HONG; Kyu Tae PARK; Jun Hee BAE; Byung Seo YOON
- Web page: https://patentgrep.com/patent/US20190317367A1

## CPC

- G02F 1/133611: {including means for improving the brightness uniformity}
- G02F 1/133308: {Support structures for LCD panels, e.g. frames or bezels}
- G02F 1/133606: {including a specially adapted diffusing, scattering or light controlling members}
- G02F 1/133608: {including particular frames or supporting means}
- G02F 1/133314: {Back frames}
- G02F 1/133603: {with LEDs}
- G02F 1/133607: {the light controlling member including light directing or refracting elements, e.g. prisms or lenses}
- 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 backlight unit and a display device including the same are provided. The backlight unit includes a light source; a mold frame configured to accommodate the light source and having a window frame shape with an opening therein; and a supporting member disposed on the mold frame and comprising an optical pattern, wherein the mold frame comprises a first sidewall, and an inclined surface protruding obliquely downward and inward from an inner side surface of the first sidewall, and wherein the supporting member is disposed on the inclined surface of the mold frame.

## Claims

### Claim 1

A backlight unit comprising:
a light source;
a mold frame configured to accommodate the light source and having a window frame shape with an opening therein; and
a support on the mold frame and comprising an optical pattern,
wherein the mold frame comprises a first sidewall, and an inclined surface protruding obliquely downward and inward from an inner side surface of the first sidewall, and
wherein the support is on the inclined surface of the mold frame.

### Claim 2 (depends on 1)

The backlight unit of claim 1, wherein the support comprises an upper surface oriented vertically to the first sidewall of the mold frame, and an inclined surface extended obliquely downward and inward at a same inclination angle as the inclined surface of the mold frame.

### Claim 3 (depends on 2)

The backlight unit of claim 2, wherein the optical pattern is formed in the upper surface and/or the inclined surface of the support.

### Claim 4 (depends on 3)

The backlight unit of claim 3, wherein the optical pattern is formed by patterning at least one of the surfaces of the support.

### Claim 5 (depends on 3)

The backlight unit of claim 3, wherein the optical pattern has a prism or a lenticular shape.

### Claim 6 (depends on 5)

The backlight unit of claim 5, wherein the optical pattern is extended in a same direction as a direction in which the support is extended.

### Claim 7 (depends on 3)

The backlight unit of claim 3, wherein a thickness of the support increases in a direction away from the first sidewall of the mold frame.

### Claim 8 (depends on 3)

The backlight unit of claim 3, further comprising: a coupling member between the support and the inclined surface of the mold frame.

### Claim 9 (depends on 3)

The backlight unit of claim 3, further comprising: an optical plate on the upper surface of the support.

### Claim 10 (depends on 9)

The backlight unit of claim 9, wherein the optical pattern is formed in the upper surface of the support and is in direct contact with the optical plate.

### Claim 11 (depends on 10)

The backlight unit of claim 10, wherein a portion of the optical pattern in contact with the optical plate is parallel to the optical plate.

### Claim 12 (depends on 1)

The backlight unit of claim 1, wherein the support is made of a transparent material.

### Claim 13 (depends on 12)

The backlight unit of claim 12, wherein the support contains scattering particles.

### Claim 14

A display device comprising:
a display panel; and
a backlight unit below the display panel,
wherein the backlight unit comprises:
a light source;
a mold frame configured to accommodate the light source and having a window frame shape with an opening therein;
a support on the mold frame and comprising an optical pattern; and
an optical plate on the support,
wherein the mold frame comprises a first sidewall, and an inclined surface protruding obliquely downward and inward from an inner side surface of the first sidewall, and
wherein the support is on the inclined surface of the mold frame.

### Claim 15 (depends on 14)

The display device of claim 14, further comprising:
a bottom cover below the light source,
wherein the support comprises an upper surface oriented parallel to a bottom of the bottom cover, and an inclined surface extended obliquely downward and inward at a same inclination angle as the inclined surface of the mold frame.

### Claim 16 (depends on 15)

The display device of claim 15, wherein the optical pattern is formed in the upper surface and/or the inclined surface of the support.

### Claim 17 (depends on 16)

The display device of claim 16, wherein the optical pattern is formed by patterning at least one of the surfaces of the support.

### Claim 18 (depends on 17)

The display device of claim 17, wherein the optical pattern has a prism or a lenticular shape.

### Claim 19 (depends on 18)

The display device of claim 18, wherein the optical pattern is formed in the upper surface and is in direct contact with the optical plate.

### Claim 20 (depends on 14)

The display device of claim 14, wherein the support is formed integrally with the mold frame.