Liquid crystal display device with heat dissipation on the printed circuit board

• US 7,852,423 B2
• Filed: 12/28/2004
• Issued: 12/14/2010
• Est. Priority Date: 03/30/2004
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Park, Won Yong
• Primary Examiner(s): Nguyen; Hoan C
• Application Number:
  US11/022,763
• Publication Number:
  US 20050219438A1
• Time in Patent Office: 2,177 Days
• Field of Search: 349/58, 349 61- 63, 349/65, 349149-151, 361/681
• US Class Current: 349/58
• CPC Class Codes: G02F 1/133385 with cooling means, e.g. fans
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels

Abstract

A liquid crystal display device includes a main support supporting a liquid crystal panel and a back light unit, a printed circuit board attached to the liquid crystal panel to provide driving signals to the liquid crystal panel, a separation part between the printed circuit board and the main support creating a gap therebetween, and a holder holding the printed circuit board and the main support together.

Claims

1. A liquid crystal display (LCD) device, comprising:

a liquid crystal panel;

a backlight unit;

a main support supporting the liquid crystal panel and the back light unit;

a data printed circuit board attached to the liquid crystal panel to provide driving signals to the liquid crystal panel using power received by a connector formed on the edge of the printed circuit board, wherein the connector is connected to a external power source;

a gate printed circuit board for driving gate lines in the liquid crystal panel;

a separation part arranged between the data printed circuit board and a main support and creating a space therebetween to dissipate heat from the data printed circuit board, wherein the one part of the separation part is in direct contact with the main support and the other part of the separation part is in direct contact with the data printed circuit board, and wherein the contact surface between the main support and the one part of the separation part faces the contact surface between the data printed circuit board and the other part of the separation part, and wherein the separation part is formed as a single unit on an entire edge of the data printed circuit board; and

at least a tape carrier package to electrically connect the liquid crystal panel to the data printed circuit board, wherein an edge of the separation part protrudes toward the tape carrier package further than the edge of the data printed circuit board, and wherein the edge of the separation part is not in contact with the space.

2. The LCD device as claimed in claim 1, wherein the separation part is formed of plastic.

3. The LCD device as claimed in claim 1, wherein the separation part is arranged on a rear surface of the main support.

4. The LCD device as claimed in claim 1, wherein at least an integrated circuit is provided to an outside surface of the data printed circuit board.

5. A process for fabricating a liquid crystal display (LCD) device, comprising:

arranging a liquid crystal panel and a back light unit in a main support, wherein the liquid crystal panel and the back light unit are supported by the main support;

forming a separation part on one of a data printed circuit board and the main support and creating a space therebetween to dissipate heat generated from the data printed circuit board which has a connector formed on the edge of the data printed circuit board, wherein the connector is connected to an external power source;

foaming a gate printed circuit board for driving gate lines in the liquid crystal panel;

attaching the data printed circuit board to the main support such that a gap between the data printed circuit and the main support is created by the separation part, wherein the one part of the separation part is in direct contact with the main support and the other part of the separation part is in direct contact with the data printed circuit board, and wherein the contact surface between the main support and the one part of the separation part faces the contact surface between the data printed circuit board and the other part of the separation part, and wherein the separation part is formed as a single unit on an entire edge of the data printed circuit board; and

forming at least a tape carrier package to electrically connect the liquid crystal panel to the data printed circuit board, wherein an edge of the separation part protrudes toward the tape carrier package further than the edge of the data printed circuit board, and wherein the edge of the separation part is not in contact with the gap.

6. The process as claimed in claim 5, wherein the separation part is formed of plastic.

7. The process as claimed in claim 5, further comprising forming at least an integrated circuit on an outside surface of the data printed circuit board.

8. The process as claimed in claim 5, wherein the separation part is formed on a rear surface of the main support.