# US 8,465,192 B2 · Backlight unit and display apparatus including the same

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- Number: US 8,465,192 B2
- Document ID: US8465192B2
- Status: Granted
- Kind: B2
- Application number: 13/434,052
- Filed: 2012-03-29
- Published: 2012-07-19
- Granted: 2013-06-18
- Earliest claimed: 2008-11-27
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Dae-hyoun Byoun; Myeong-kuk Jin; Jun-seok An; Seung-bum Kim
- Inventors: Dae-hyoun Byoun; Myeong-kuk Jin; Jun-seok An; Seung-bum Kim
- Web page: https://patentgrep.com/patent/US8465192B2

## CPC

- G02B 6/0068: {Arrangements of plural sources, e.g. multi-colour light sources}
- G02B 6/0091: {of the light source relative to the light guide (G02B6/0021 takes precedence)}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A backlight unit and a display apparatus including the backlight unit are provided. The backlight unit includes: a light source unit which includes at least one light source which emits light, and a gap maintaining unit; a light guiding plate which guides the light emitted from the light source; and an elastic member which elastically biases the light source unit toward the light guiding plate so that the gap maintaining unit maintains a gap between the light source and the light guiding plate.

## Claims

### Claim 1

A display apparatus comprises:
a display panel;
a video receiver which receives a video signal;
a signal processor which processes the received video signal so that the display panel displays an image based on the video signal processed by the signal processor; and
a backlight unit which provides light to the display panel,
the backlight unit comprising:
a light source unit which comprises a light source substrate and a plurality of light emit diodes which emit light and are disposed on the light source substrate;
a light guiding plate which guides the light emitted from the light source; and
a gap providing member which forms a gap between the plurality of light emit diodes and the light guiding plate,
wherein the light source unit is disposed at a lateral side of the light guide plate and the gap providing member is expanded from the light source substrate toward the lateral side of the light guide plate to form the gap between the plurality of light emit diodes and the lateral side of the light guide plate.

### Claim 2 (depends on 1)

The display apparatus according to claim 1, wherein the gap providing member comprises a gap maintaining unit which supports the light source so that the gap has the predetermined distance.

### Claim 3 (depends on 2)

The display apparatus according to claim 2, wherein the gap providing member further comprises an elastic member which elastically biases the light source unit toward the light guiding plate so that the gap maintaining unit maintains a gap between the light source and the light guiding plate.

### Claim 4 (depends on 2)

The display apparatus according to claim 2, wherein the gap maintaining unit is integrally formed with the light source substrate.

### Claim 5 (depends on 4)

The display apparatus according to claim 4, further comprising an accommodation member which accommodates the light source unit and the light guiding plate,
wherein the elastic member is coupled to and disposed between the accommodation member and the light source unit.

### Claim 6 (depends on 2)

The display apparatus according to claim 2, wherein the elastic member comprises at least one of a coil spring, a rubber, a graphite tape, a graphite sheet and a sponge.

### Claim 7 (depends on 1)

The display apparatus according to claim 1, wherein the light source is arranged along a lateral side of the light guiding plate.

### Claim 8 (depends on 1)

The display apparatus according to claim 1, wherein the light source comprises a light emitting diode.