Liquid crystal display device

• US 8,810,747 B2
• Filed: 12/07/2010
• Issued: 08/19/2014
• Est. Priority Date: 12/11/2009
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Ryu, Jae Yong, Park, Sang Ryeon, Kim, Jong Tae
• Primary Examiner(s): CHEN, WEN YING PATTY
• Application Number:
  US12/961,723
• Publication Number:
  US 20110141387A1
• Time in Patent Office: 1,351 Days
• Field of Search: 349/58, 349/65
• US Class Current: 349/58
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133382 Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
• CPC Class Codes: G02F 2201/46 Fixing elements

Abstract

An LCD device adapted to simplify a configuration and to secure a ground continuity for driving components is disclosed. The LCD device includes a liquid crystal display panel; a front cover encompassing edges of the liquid crystal display panel; a backlight unit applying light to the liquid crystal display panel and having a front surface supporting the liquid crystal display panel and a rear surface; a back cover receiving the backlight unit; a metal plate fastened and electrically connected to the front cover; and a driver on the metal plate, the driver electrically connected to the metal plate.

Claims

1. A liquid crystal display device comprising:

a liquid crystal display panel;

a front cover encompassing edges of the liquid crystal display panel;

a backlight unit applying light to the liquid crystal display panel and having a front surface supporting the liquid crystal display panel and a rear surface;

a back cover receiving the backlight unit;

a metal plate fastened and electrically connected to the front cover;

a driver on and in contact with the metal plate, the driver electrically connected to the metal plate;

a heat radiation plate fastened and electrically connected to an inner surface of the front cover;

a support plate fastened and electrically connected to the inner surface of the front cover opposite to the heat radiation plate; and

a panel driving printed-circuit-board at an edge of the liquid crystal display panel, wherein the panel driving printed-circuit-board is disposed on a rear surface of the support plate,

wherein the panel driving printed-circuit-board is disposed between the support plate and the metal plate.

2. The liquid crystal display device claimed as claim 1, wherein the front cover functions as a top case and an upper case of the liquid crystal display device, and wherein the back cover functions as a bottom cover and a lower case of the liquid crystal display device.

3. The liquid crystal display device claimed as claim 1, wherein the metal plate is fastened to at least two opposite sides of the front cover.

4. The liquid crystal display device claimed as claim 1, wherein the metal plate straddles at least two opposite sides of a rear surface of the backlight unit.

5. The liquid crystal display device claimed as claim 1, wherein the backlight unit includes a printed-circuit-board loaded with a plurality of light emission diodes.

6. The liquid crystal display device claimed as claim 5, wherein the driver includes a backlight driving circuit that drives the plurality of light emission diodes, along with a panel driving circuit and a system driving circuit.

7. The liquid crystal display device claimed as claim 6, wherein the heat radiation plate is configured to come in a surface contact with the printed-circuit-board.

8. The liquid crystal display device claimed as claim 1, wherein the heat radiation plate is configured to support and electrically connected to the panel driving printed-circuit-board.

9. A liquid crystal display device comprising:

a liquid crystal display panel;

a front cover configured to encompass edges of the liquid crystal display panel and to function as a top case and an upper case of the liquid crystal display device;

a backlight unit configured to apply light to the liquid crystal display panel and having a front surface supporting the liquid crystal display panel and a rear surface;

a back cover receiving the backlight unit and to function as a bottom cover and a lower case of liquid crystal display device;

a heat radiation plate disposed under a first side of the backlight unit and configured to discharge heat generated from a plurality of light emission diodes;

a support plate disposed under a second side of the backlight unit and configured to support a panel driving printed-circuit-board, wherein the first side is opposite the second side; and

a driver disposed on a rear surface of the back light unit and fastened to the support plate and the heat radiation plate.

10. The liquid crystal display device claimed as claim 9, wherein the front cover is made of metal material, the heat radiation plate is fastened to an inner side of the front cover and electrically connected to the front cover.

11. The liquid crystal display device claimed as claim 9, wherein the backlight unit includes a printed-circuit-board loaded with the plurality of light emission diodes.

12. The liquid crystal display device claimed as claim 11, wherein the printed-circuit-board loaded with the light emission diode is supported and electrically connected to the heat radiation plate.

13. The liquid crystal display device claimed as claim 9, wherein the front cover is made of metal material, the support plate is fastened to an inner surface of the front cover and electrically connected to the front cover and the support plate is supported and electrically connected to the panel driving printed-circuit-board.

14. The liquid crystal display device claimed as claim 9, wherein the front cover is made of metal material, the support plate and the heat radiation plate are fastened to inner sides of the front cover and electrically connected to the front cover and the driver is electrically connected to at least one of the support plate and the heat radiation plate.

15. The liquid crystal display device claimed as claim 9, wherein the support plate includes;

a first support portion supporting the panel driving printed-circuit-board; and

a second support portion extending from the first support portion and fastened to the driver.

16. The liquid crystal display device claimed as claim 15, wherein the driver is fastened to the heat radiation plate.

17. The liquid crystal display device claimed as claim 9, wherein the support plate and the heat radiation plate are fastened to side surfaces of the front cover.

18. The liquid crystal display device claimed as claim 9, wherein the heat radiation plate and the support plate are formed of a metal material.

19. The liquid crystal display device claimed as claim 9, wherein the driver includes a backlight driving circuit that drives the plurality of light emission diodes.