# US 8,542,332 B2 · Liquid crystal display device comprising a protection sheet attached to a reflector and including a protruding part that extends along a first direction from an edge of the protection sheet

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- Number: US 8,542,332 B2
- Document ID: US8542332B2
- Status: Granted
- Kind: B2
- Application number: 12/588,299
- Filed: 2009-10-09
- Published: 2010-11-11
- Granted: 2013-09-24
- Earliest claimed: 2009-05-08
- Assignees: LG Display Co., Ltd.
- Applicants: Jae-Sung Park; Jung-Hun Lee
- Inventors: Jae-Sung Park; Jung-Hun Lee
- Web page: https://patentgrep.com/patent/US8542332B2

## CPC

- G02F 1/133608: {including particular frames or supporting means}
- G02F 1/133308: {Support structures for LCD panels, e.g. frames or bezels}
- G02B 6/0081: {Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging}
- G02F 1/133314: {Back frames}
- G02F 1/13332: {Front frames}
- G02F 2201/50: Protective arrangements
- G02F 2202/28: Adhesive materials or arrangements
- 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
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A liquid crystal display device includes a liquid crystal panel; a main frame surrounding sides of the liquid crystal panel; a backlight unit disposed under the liquid crystal panel and surrounded by the main frame, the backlight unit including a light guide plate, a lamp at a side of the light guide plate, a reflector under the light guide plate and an optical sheet on the light guide plate, wherein a rear surface of the reflector is exposed through an opening of the main frame; and a protection sheet attached to the rear surface of the reflector to protect the rear surface of the reflector and including a protruding part at a side of the protection sheet, the protection sheet has a rectangular shape.

## Claims

### Claim 1

A liquid crystal display device, comprising:
a liquid crystal panel;
a main frame surrounding sides of the liquid crystal panel;
a backlight unit disposed under the liquid crystal panel and surrounded by the main frame, the backlight unit including a light guide plate, a lamp at a side of the light guide plate, a reflector under the light guide plate and an optical sheet on the light guide plate, wherein a rear surface of the reflector is exposed through an opening of the main frame; and
a protection sheet attached to the rear surface of the reflector to protect the rear surface of the reflector and includes a protruding part that extends along a first direction from an edge of the protection sheet, the protection sheet has a rectangular shape,
wherein the edge has a first width along a second direction, which is perpendicular to the first direction, and the protruding part has a second width, which is smaller than the first width, along the second direction,
wherein the reflector has a third width larger than a fourth width of the opening of the main frame and a first length larger than a second length of the opening of the main frame, and wherein the rectangular shape of the protection sheet has the first width being substantially equal to the fourth width and a third length smaller than the second length, and
wherein the first width, the second width, and the third length being along a surface plane of the protection sheet, the first length and the third width being along a surface plane of the reflector, and the fourth width and the second length being along a surface plane of the main frame.

### Claim 2 (depends on 1)

The device according to claim 1, wherein the protruding part is disposed in the opening of the main frame.

### Claim 3 (depends on 1)

The device according to claim 1, wherein the reflector is an enhanced specular reflector.

### Claim 4 (depends on 1)

The device according to claim 1, further comprising adhesive tape covering front edges of the liquid crystal panel and combined with the main frame.