LIQUID CRYSTAL DISPLAY DEVICE

• US 20110084956A1
• Filed: 09/14/2010
• Published: 04/14/2011
• Est. Priority Date: 10/06/2009
• Status: Abandoned Application

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: CHOI, Byung Jin, LEE, Oh Hyun
• Application Number:
  US12/881,795
• Publication Number:
  US 20110084956A1
• Time in Patent Office: Days
• US Class Current: 345/212
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133612 Electrical details
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2330/06 Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

Disclosed is a LCD device that includes a liquid crystal panel; a driving circuit including data and gate drivers, a timing controller to control the data and gate drivers, and a first power supplier to apply a first driving voltage to the data and gate drivers and the timing controller; a backlight unit disposed at the rear of the liquid crystal panel and including an LED array provided with a plurality of LEDs, an LED driver to apply driving signals to the LED array, and a second power supplier to apply a second driving voltage to the LED driver; and a printed circuit board connected to one edge of the liquid crystal panel and defined into first and second domains which are combined with each other.

Claims

1. A liquid crystal display device comprising:

a liquid crystal panel;

a driving circuit configured to include data and gate drivers which are connected to drive the liquid crystal panel, a timing controller which is formed to control the data and gate drivers, and a first power supplier which is formed to apply a first driving voltage to the data and gate drivers and the timing controller;

a backlight unit disposed at the rear of the liquid crystal panel and configured to include an LED array which is provided with a plurality of LEDs, an LED driver which is formed to apply driving signals to the LED array, and a second power supplier which is formed to apply a second driving voltage to the LED driver; and

a printed circuit board connected to one edge of the liquid crystal panel and defined into first and second domains which are combined with each other,

wherein at least one part of the driving circuit is disposed in the first domain of the printed circuit board, and at least one part of the backlight unit is disposed in the second domain of the printed circuit board.

2. The liquid crystal display device claimed as claim 1, wherein the first and second domains of the printed circuit board are electrically insulated from each other.

3. The liquid crystal display device claimed as claim 1, wherein the first and second domains of the printed circuit board are connected to each other by means of balls.

4. The liquid crystal display device claimed as claim 1, wherein the first domain of the printed circuit board is loaded with the timing controller and first power supplier which are included in the driving circuit.

5. The liquid crystal display device claimed as claim 1, wherein the second domain of the printed circuit board is loaded with the LED driver and second power supplier which are included in the backlight unit.

6. The liquid crystal display device claimed as claim 1, wherein the printed circuit board defined into the first and second domains is formed by

preparing a bared printed-circuited-board;

cutting the bared printed-circuit-board into two parts which each have the sizes of the first and second domains; and

combining the two parts.

7. The liquid crystal display device claimed as claim 1, wherein the two parts is connected to each other by means of balls in such a manner as to be in a single plane.

8. The liquid crystal display device claimed as claim 1, wherein the first driving voltage generated from the first power supplier on the first domain has about 5V, and the second driving voltage generated from the second power supplier on the second domain has about 24V.

9. The liquid crystal display device claimed as claim 1, wherein the data driver is mounted on one edge of the liquid crystal panel through a first COF (chip on film), and the gate driver is mounted on another edge of the liquid crystal panel through a second COF.

10. The liquid crystal display device claimed as claim 9, wherein the first COF is connected to the first domain of the printed circuit board.