Liquid crystal display device

• US 8,154,702 B2
• Filed: 07/06/2009
• Issued: 04/10/2012
• Est. Priority Date: 07/08/2008
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kim, Sung Woo
• Primary Examiner(s): DUONG, THOI V
• Application Number:
  US12/498,146
• Publication Number:
  US 20100007817A1
• Time in Patent Office: 1,009 Days
• Field of Search: 349/150, 349/65, 349/58, 349/60, 362/612, 362/97.2, 362/631, 362/633, 362/634
• US Class Current: 349/150
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0083 Details of electrical connections of light sources to drivers, circuit boards, or the like
• CPC Class Codes: G02B 6/0085 Means for removing heat created by the light source from the package heat extraction or cooling elements for semiconductor light sources in general H01L33/64
• CPC Class Codes: G02B 6/0091 of the light source relative to the light guide G02B6/0021 takes precedence
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H05K 1/189 characterised by the use of a flexible or folded printed circuit H05K3/326 takes precedence

Abstract

The present invention relates to a liquid crystal display device having an LED flexible substrate which requires no bonding by making a simple structural change. The liquid crystal display device includes a liquid crystal display panel, an LED for providing a light to the liquid crystal display panel, and an LED flexible substrate having a seating portion for mounting the LED thereto, and first and second flat portions bent from the seating portion perpendicular thereto respectively, to form a flexible printed circuit (FPC).

Claims

1. A liquid crystal display device comprising:

a liquid crystal display panel;

an LED for providing a light to the liquid crystal display panel;

an LED flexible substrate having a seating portion for mounting the LED thereto, and first and second flat portions bent from the seating portion perpendicular thereto respectively, to form a flexible printed circuit (FPC);

a bottom chassis configured to have a C shape for surrounding the LED; and

a mold frame for surrounding the LED and the LED flexible substrate;

wherein the mold frame has a space for leading the first flat portion to an outside for connection to an inverter,

wherein the second flat portion is bent to have a length the same with the seating portion.

2. The liquid crystal display device as claimed in claim 1, wherein the first flat portion is bent from the seating portion perpendicular thereto, and connected to the inverter for connection to a driving power for driving the LED.

3. The liquid crystal display device as claimed in claim 1, wherein the second flat portion is bent from the seating portion perpendicular thereto, and includes a line for a driving signal for driving the LED and dissipating heat from the LED.

4. The liquid crystal display device as claimed in claim 1, wherein a contact line between the seating portion and the first and second flat portions perpendicular to the seating portion is half cut.

5. The liquid crystal display device as claimed in claim 1, wherein the LED flexible substrate is coated with a reflective material having high reflectivity.

6. The liquid crystal display device as claimed in claim 1, further comprising an LED cover of a material of high reflectivity having a hole for placing the LED mounted to the LED flexible substrate therethrough.

7. The liquid crystal display device as claimed in claim 6, wherein the LED cover includes;

a side having the hole formed therein for holding the LED mounted to the LED flexible substrate passed therethrough, and

first and second covers formed perpendicular to the seating portion to surround an upper side and a lower side of the LED.

8. The liquid crystal display device as claimed in claim 6,

wherein the bottom chassis surrounds the LED, the LED flexible substrate, and the LED cover, and supporting the same from undersides thereof.

9. The liquid crystal display device as claimed in claim 8, further comprising a heat dissipation tape attached between the bottom chassis and the seating portion of the LED flexible substrate for quick dissipation of heat from the LED.