Backlight assembly and display device having the same

• US 7,819,574 B2
• Filed: 10/21/2008
• Issued: 10/26/2010
• Est. Priority Date: 12/28/2007
• Status: Expired due to Fees

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Hwang, Yong-Hyun, Yoo, Byung-Cheon
• Primary Examiner(s): Ton; Anabel M
• Application Number:
  US12/255,261
• Publication Number:
  US 20090168405A1
• Time in Patent Office: 735 Days
• Field of Search: 362632-634, 362/217, 362/1, 362/217.11, 362/217.15, 362/609, 362/97.1, 362/97.2
• US Class Current: 362/633
• CPC Class Codes: G02F 1/133604 with lamps
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means

Abstract

A backlight assembly and a liquid crystal device having the same are provided. The backlight assembly includes a lamp unit configured to generate light, a reflection sheet configured to reflect the light from the lamp unit and a receiving frame having at least one recess portion configured to fix the reflection sheet so that the reflection sheet can be fixed to the backlight assembly without using an adhesive.

Claims

1. A backlight assembly, comprising:

a light source configured to generate light;

a reflection sheet spaced apart from the light source to reflect the light from the light source; and

a receiving frame having at least one wall and at least one recess portion recessed in a part of the wall, wherein the reflection sheet is inserted into the recess portion,

wherein a supporting portion configured to support the reflection sheet is extended from the wall of the receiving frame adjacent the recess portion, the supporting portion comprising a protrusion section extending from the recess portion.

2. The backlight assembly of claim 1, wherein the recess portion includes a sheet receiving space configured to receive a portion of the reflection sheet and an opening to the sheet receiving space is provided in the wall of the receiving frame.

3. The backlight assembly of claim 2, wherein the receiving frame includes a plurality of recess portions, and the reflection sheet comprises an uneven pattern including a plurality of protrusions, each protrusion being inserted into a corresponding one of the recess portions.

4. The backlight assembly of claim 2, wherein the supporting portion extends from the wall of the receiving frame adjacent the opening to the sheet receiving space,

the protrusion section extends from the opening, and the supporting portion further comprises an inclined section extending from an end of the protrusion section.

5. The backlight assembly of claim 2, wherein the supporting portion extends from the wall of the receiving frame adjacent the opening to the sheet receiving space, and

the protrusion section extends from the opening, and the supporting portion further comprises an inclined section extending from an end of the protrusion section,

the backlight assembly further comprising an optical plate disposed above the protrusion section.

6. The backlight assembly of claim 2, wherein the supporting portion extends from the wall of the receiving frame adjacent the opening to the sheet receiving space,

the supporting portion comprising at least one projection, and the reflection sheet comprising at least one hole corresponding to the projection.

7. The backlight assembly of claim 2, further comprising at least one sheet fixing member, the sheet fixing member being inserted into the sheet receiving space to contact the reflection sheet.

8. The backlight assembly of claim 2, wherein the recess portion comprises a fixing portion protruding from an inside surface of the sheet receiving space.

9. The backlight assembly of claim 2, wherein a cross section of the sheet receiving space has at least one of a straight shape, a curved shape, an oblique shape, and a combination thereof.

10. The backlight assembly of claim 2, wherein a width of the sheet receiving space decreases in a direction toward an inner portion of the sheet receiving space.

11. The backlight assembly of claim 1, wherein the recess portion includes a sheet receiving space having a plurality of openings and the reflection sheet comprises an uneven pattern configured to be inserted into the sheet receiving space through the openings.

12. The backlight assembly of claim 1, further comprising:

a lamp fixing frame coupled to the receiving frame; and

an optical film unit supported by the lamp fixing frame and the receiving frame.

13. The backlight assembly of claim 12, further comprising a bottom plate contacting bottom surfaces of the receiving frame and lamp fixing frame.

14. A liquid crystal display device, comprising:

a backlight assembly comprising;

a light source configured to generate light;

a reflection sheet spaced apart from the light source to reflect the light from the light source; and

a receiving frame having at least one wall and at least one recess portion recessed in a part of the wall; and

a liquid crystal display panel, wherein the reflection sheet is inserted into the recess portion,

wherein a supporting portion configured to support the reflection sheet is extended from the wall of the receiving frame adjacent the recess portion, the supporting portion comprising a protrusion section extending from the recess portion.

15. The liquid crystal display device of claim 14, wherein the recess portion includes a sheet receiving space configured to receive a portion of the reflection sheet and an opening to the sheet receiving space is provided in the wall of the receiving frame.

16. The liquid crystal display device of claim 15, wherein the receiving frame includes a plurality of recess portions, and

the reflection sheet comprises a plurality of protrusions, each protrusion being inserted into a corresponding one of the recess portions.

17. The liquid crystal display device of claim 15, wherein the supporting portion extends from the wall of the receiving frame adjacent the opening to the sheet receiving space,

the supporting portion comprising at least one projection, and the reflection sheet comprising at least one hole corresponding to the projection.

18. The liquid crystal display device of claim 15, further comprising at least one sheet fixing member, the sheet fixing member being inserted into the sheet receiving space to contact the reflection sheet.

19. The liquid crystal display device of claim 15, wherein a cross section of the sheet receiving space has at least one of a straight shape, a curved shape, an oblique shape, and a combination thereof.

20. The liquid crystal display device of claim 15, wherein a width of the sheet receiving space gradually decreases in a direction toward an inner portion of the sheet receiving space.