# US 2010/0165240 A1 · Liquid crystal display device

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- Number: US 2010/0165240 A1
- Document ID: US20100165240A1
- Status: Published application
- Kind: A1
- Application number: 12/536,836
- Filed: 2009-08-06
- Published: 2010-07-01
- Earliest claimed: 2008-12-31
- Assignees: LG Display Co., Ltd.
- Inventors: Min-Su CHO; Jae-Ho LEE; Sang-Dae LEE
- Web page: https://patentgrep.com/patent/US20100165240A1

## CPC

- G02F 1/133603: {with LEDs}
- G02F 1/133608: {including particular frames or supporting means}
- G02F 1/133612: {Electrical details}
- H05K 1/142: {Arrangements of planar printed circuit boards in the same plane, e.g. auxiliary printed circuit insert mounted in a main printed circuit}
- 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
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

Disclosed is a liquid crystal display (LCD) device capable of improving a use efficiency of light emitting diode (LED) printed circuit boards (PCBs) by configuring the existing plate type LED PCBs in a bar type so as to reduce an area used, the LCD device including, an LCD panel configured to display images, a backlight unit disposed at a lower portion of the LCD panel for providing light to the LCD panel, and provided with a plurality of light emitting diode (LED) printed circuit boards (PCBs) formed in a bar type, and a plurality of LEDs disposed on each of the LED PCBs to be spaced apart from each other, and casing components including a mold frame for receiving and fixing the LCD panel and the backlight unit, an upper cover and a bottom cover.

## Claims

### Claim 1

A liquid crystal display (LCD) device comprising:
an LCD panel configured to display images;
a backlight unit disposed at a lower portion of the LCD panel that provides light to the LCD panel, and having a plurality of light emitting diode (LED) printed circuit boards (PCBs) formed in a bar type, and a plurality of LEDs disposed on each of the LED PCBs to be spaced apart from each other; and
casing components including a mold frame for receiving and fixing the LCD panel and the backlight unit, an upper cover and a bottom cover.

### Claim 2 (depends on 1)

The device of claim 1, further comprising a diffusion plate and a plurality of optical sheets both disposed above the plurality of LEDs and configured to diffuse and condense light emitted from the LEDs.

### Claim 3 (depends on 1)

The device of claim 1, wherein the plurality of bar type LED PCBs are divided into several groups so as to be electrically connected to corresponding connection PCBs via connection members.

### Claim 4 (depends on 3)

The device of claim 3, wherein the connection PCBs are connected to a driving unit PCB via cables connected to connectors, the driving unit PCB having driving components for driving the LEDS mounted thereon.

### Claim 5 (depends on 1)

The device of claim 1, wherein the bar type LED PCBs are connected at one ends thereof to be configured in a form of two to eight pronged spears.

### Claim 6 (depends on 1)

The device of claim 1, wherein the bar type LED PCBs are arranged in a horizontal direction or a longitudinal direction to be widely distributed as the LEDs are periodically arranged.

### Claim 7 (depends on 5)

The device of claim 5, wherein the two to eight bar type LED PCBs comprise first LED PCBs and second LED PCBs engaged with each other.

### Claim 8 (depends on 1)

The device of claim 1, wherein the bar type LED PCBs are coupled to the bottom cover by screws.

### Claim 9 (depends on 5)

The device of claim 5, wherein the bar type LED PCBs in the form of two to eight pronged spears are inserted in the bottom cover at once.

### Claim 10 (depends on 5)

The device of claim 5, wherein the bar type LED PCBs in the form of two to eight pronged spears are provided with holes or protrusions to be slid into the bottom cover.