BACKLIGHT UNIT AND DISPLAY DEVICE HAVING THE SAME

• US 20080036940A1
• Filed: 08/09/2007
• Published: 02/14/2008
• Est. Priority Date: 08/09/2006
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: SONG, Si Joon, CHANG, Moon Hwan, KIM, Gi Cherl
• Application Number:
  US11/836,284
• Publication Number:
  US 20080036940A1
• Time in Patent Office: Days
• US Class Current: 349/61
• CPC Class Codes: G02F 1/13336 Combining plural substrates to produce large-area displays, e.g. tiled displays
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means
• CPC Class Codes: G02F 1/133612 Electrical details
• CPC Class Codes: G02F 1/133621 providing coloured light G02F1/133617, G02F1/133533 take precedence

Abstract

The present invention discloses a backlight unit and a display device having the same. The backlight unit includes an assembly of a plurality of boards having a plurality of light emitting diodes respectively mounted thereon as a light source of the backlight unit. A first board is fixed using a fixing member, and a second board, which is adjacent to the first board, is fixed by the first board, so that the boards can be prevented from coming loose.

Claims

1. A backlight unit, comprising:

a pair of boards comprising a first board and a second board;

a plurality of light emitting element portions respectively mounted on the first board and the second board;

a first fixing pattern arranged in a side region of the first board;

a second fixing pattern arranged in a side region of the second board, the second fixing pattern overlapping with the first fixing pattern;

a receiving member accommodating the first board and the second board; and

a first fixing member fixing the first board or the second board to the receiving member.

2. The backlight unit of claim 1, wherein the first fixing member is arranged in a region adjacent to the overlapping region of the board positioned in the upper portion of the overlapping region, or in the overlapping region of the board.

3. The backlight unit of claim 1, wherein the second fixing pattern is arranged on the first fixing pattern, and the first fixing member is arranged on the second board.

4. The backlight unit of claim 1, wherein the first fixing member is fixed to the receiving member after penetrating a hole of the first board or the second board from a top of the first board or the second board.

5. The backlight unit of claim 1, wherein the first fixing pattern is a first inclined surface with a downward slope, and the second fixing pattern is a second inclined surface with an upward slope, the second inclined surface corresponding to the first inclined surface.

6. The backlight unit of claim 1, wherein the first fixing pattern comprises a first concavo-convex portion arranged in a side of the first board, and the second fixing pattern comprises a second concavo-convex portion corresponding to the first concavo-convex portion.

7. The backlight unit of claim 1, wherein the first board and the second board each comprise a connector portion connected to an external power source and wherein the light emitting element portions each comprise first, second, and third light emitting diodes (LEDs) to emit red, green, and blue light, respectively, and the first, second, and third LEDs are electrically connected to first, second, and third pairs of positive and negative terminals of the connector portion, respectively.

8. The backlight unit of claim 1, further comprising a second fixing member arranged in a region of the first board or the second board that is adjacent to an edge of the receiving member, the second fixing member fixing the first board or the second board to the receiving member.

9. The backlight unit of claim 8, wherein the second fixing member comprises any one of a screw, a hook, and a projection protruding from a sidewall of the receiving member.

10. The backlight unit of claim 1, wherein the first board and the second board are arranged adjacent to each other in the receiving member.

11. The backlight unit of claim 1, wherein the first fixing member penetrates a hole in the first board and a hole in the second board.

12. The backlight unit of claim 1, wherein a vertical cross section of an overlapping surface of the first fixing pattern and the second fixing pattern is shaped in any one of an oblique line, a bent straight line, and a curved line.

13. A backlight unit, comprising:

a receiving member;

a plurality of boards comprising a plurality of light emitting element portions respectively mounted thereon, the boards being arranged within the receiving member; and

a first fixing member fixing a first board to the receiving member, the first board being arranged in an upper portion of an overlapping region in which the first board and a second board at least partially overlap with each other.

14. The backlight unit of claim 13, wherein the first fixing member is arranged in a region adjacent to the overlapping region of the first board or in the overlapping region of the first board.

15. The backlight unit of claim 13, wherein the boards are arranged in a matrix, and adjacent boards overlap with each other.

16. The backlight unit of claim 13, wherein the first board and a third board at least partially overlap with each other.

17. A liquid crystal display, comprising:

a backlight unit comprising a receiving member, a plurality of boards arranged within the receiving member and comprising a plurality of light emitting element portions respectively mounted thereon, and a first fixing member fixing a first board to the receiving member, the first board being arranged in an upper portion of an overlapping region in which the first board and a second board at least partially overlap with each other; and

a display panel to display an image using light emitted from the backlight unit.

18. The liquid crystal display of claim 17, wherein the backlight unit further comprises a reflection plate arranged on the boards, a diffusion plate arranged over the boards, and an optical sheet arranged over the boards.

19. The liquid crystal display of claim 17, wherein the first fixing member is arranged in a region adjacent to the overlapping region of the first board or in the overlapping region of the first board.

20. The liquid crystal display of claim 17, wherein the boards are arranged in a matrix, and adjacent boards overlap with each other.