BACKLIGHT UNIT AND LIQUID CRYSTAL DISPLAY DEVICE HAVING THE SAME

• US 20080180947A1
• Filed: 12/26/2007
• Published: 07/31/2008
• Est. Priority Date: 01/31/2007
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kim, Seung Hyun, Lee, Chang Ho, Kwon, Oh Sang, Lee, Yong Kon, Lee, Jae Ho, Lee, Sung Keun, Jang, Eun Seok, Lee, Dae Heung, Park, Jin Seo
• Granted Patent: US 8,960,935 B2
• Time in Patent Office: Days
• US Class Current: 362/225
• CPC Class Codes: G02F 1/133604 with lamps

Abstract

Disclosed is a printed circuit board, on which a holder for fixing a lamp is mounted, is disposed on an upper surface of a bottom cover, and an inverter supplying a driving voltage to the lamp is disposed on a lower surface of the bottom cover. The printed circuit board is electrically connected to the holder as a conductive pattern is embedded in the printed circuit board. The connector is directly mounted on the inverter, or it is connected to the inverter via a wire. In this case, the connector is also connected to the printed circuit board. Therefore, the connector of the inverter and the connector of the printed circuit board are electrically connected.

Claims

1. A backlight unit, comprising:

a bottom cover;

a first printed circuit board provided in a first upper surface of the bottom cover and having a first common electrode;

a second printed circuit board provided in a second upper surface of the bottom cover and having a second common electrode;

a plurality of first holders mounted on the first printed circuit board and electrically connected to the first common electrode;

a plurality of second holders mounted on the second printed circuit board and electrically connected to the second common electrode; and

a plurality of lamps of which both ends are fixed in the first and second holders, respectively.

2. The backlight unit according to claim 1, further comprising a first inverter provided in a first lower surface of the bottom cover, and a second inverter provided in a second lower surface of the bottom cover.

3. The backlight unit according to claim 2, further comprising a first wire and a second wire, the first wire being electrically connected to the first printed circuit board, and the second wire being electrically connected to the second printed circuit board.

4. The backlight unit according to claim 3, further comprising a first through hole and a second through hole in the bottom cover, and a first to fourth connectors, the first and second connectors each connected to the first and second common electrode and the third and fourth connectors each connected to the first and second inverters.

5. The backlight unit according to claim 4, wherein the third and fourth connectors each are connected to the first and second connectors via the first and second through holes.

6. The backlight according to claim 2, further comprising a first through hole and a second through hole in the bottom cover, and a first to fourth connectors, the first and second connectors each connected to the first and second common electrode and the third and fourth connectors each connected to the first and second inverters.

7. The backlight unit according to claim 6, wherein the third and fourth connectors each are connected to the first and second connectors via the first and second through holes.

8. The backlight unit according to claim 4 or claim 6, wherein the first and second connectors are protruded from the bottom cover via the first and second through holes, respectively.

9. The backlight unit according to claim 1, wherein each of the first and second printed circuit boards is fastened to the bottom cover.

10. The backlight unit according to claim 1, further comprising a reflective sheet disposed on the bottom cover, wherein the reflective sheet is fixed by a plurality of projection regions of the bottom cover.