Backlight assembly with optical member coupling means and display appartus having the same

• US 8,550,688 B2
• Filed: 01/28/2011
• Issued: 10/08/2013
• Est. Priority Date: 02/24/2010
• Status: Expired due to Fees

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Seo, Jeong-Min, Lee, Youngho, Chun, Jaehwan, Chung, Sungwon, Kim, Tae-Sung
• Primary Examiner(s): Negron, Ismael
• Application Number:
  US13/016,289
• Publication Number:
  US 20110205728A1
• Time in Patent Office: 984 Days
• Field of Search: 362/606, 362/607, 362/618, 362/627, 362/632, 362/633, 362/634, 362/97.1, 362/97.2, 362/97.3, 362/217.01, 362/225, 362/217.1, 362/217.11, 362/217.15, 349/58, 349/64, 403/263, 403/361
• 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 includes a light generating unit, a receiving member, an optical member, and a frame member. The receiving member includes a receiving part receiving the light generating unit, a supporting part extending from the receiving part, and a protrusion portion protruded from the supporting part. The optical member is guided to a predetermined position on the supporting part by the protrusion portion, and diffuses the light provided from the light generating unit. The frame member includes a fixing part coupled with the supporting part and protruded from a surface of the frame member facing the supporting part. The fixing part prevents the optical member from moving in a direction substantially parallel to an upper surface of the supporting part.

Claims

1. A backlight assembly comprising:

a light generating unit;

a receiving member comprising a receiving part receiving the light generating unit, a supporting part extending from the receiving part, and a protrusion portion protruded from the supporting part;

an optical member located at a predetermined position on the supporting part and including a portion coupled to the protrusion portion; and

a frame member including a fixing part and a recess spaced apart from the fixing part, wherein the fixing part and recess protrude downward from a surface of the top of the frame member, the fixing part includes a first barrier wall, a second barrier wall and a third barrier wall that extend from opposite ends of the first barrier wall in a direction perpendicular to the first barrier wall to form a cavity therebetween, the fixing part faces the supporting part and is coupled with the supporting part,

wherein the fixing part is configured to prevent the optical member from moving in a direction substantially parallel to an upper surface of the supporting part, and wherein the recess is configured to receive the protrusion portion therein.

2. The backlight assembly of claim 1, wherein the light generating unit comprises a plurality of lamps extended in a first direction, arranged in a second direction substantially perpendicular to the first direction, and disposed between the optical member and the receiving member.

3. The backlight assembly of claim 1, wherein the light generating unit comprises:

a circuit board received in the receiving part and positioned to face the optical member; and

a plurality of light emitting diodes mounted on the circuit board.

4. The backlight assembly of claim 1, wherein the optical member comprises:

a diffusion plate; and

an optical sheet disposed on the diffusion plate.

5. The backlight assembly of claim 4, wherein the protrusion portion includes a multi-tiered protruding structure.

6. The backlight assembly of claim 5, wherein the protrusion portion comprises

a guide portion protruded from the supporting part to position the diffusion plate on the supporting portion and

a coupling protrusion protruded from an upper surface of the guide portion and coupled with the optical sheet.

7. The backlight assembly of claim 6, wherein the optical sheet comprises:

light transmitting portion corresponding to the diffusion plate; and

a sheet fixing portion extended from the light transmitting portion and disposed on the upper surface of the guide portion, the sheet fixing portion including a fixing hole formed therethrough.

8. The backlight assembly of claim 6, wherein the first barrier wall is positioned along a same line as a side surface of the guide portion neighboring the diffusion plate.

9. The backlight assembly of claim 8, wherein the first barrier wall faces a side surface of the diffusion plate.

10. A display apparatus comprising:

a backlight assembly; and

a display panel, wherein the backlight assembly comprises;

a light generating unit;

a receiving member comprising a receiving part receiving the light generating unit, a supporting part extending from the receiving part, and a protrusion portion protruded from the supporting part;

an optical member located at a predetermined position on the supporting part and including a portion coupled to the protrusion portion; and

a frame member including a fixing part and a recess spaced apart from the fixing part, wherein the fixing part and recess protrude downward from a surface of the top of the frame member, the fixing part includes a first barrier wall, a second barrier wall and a third barrier wall that extend from opposite ends of the first barrier wall in a direction perpendicular to the first barrier wall to form a cavity therebetween, the fixing part faces the supporting part and is coupled with the supporting part,

wherein the fixing part is configured to prevent the optical member from moving in a direction substantially parallel to an upper surface of the supporting part, and wherein the recess is configured to receive the protrusion portion therein.

11. The display apparatus of claim 10, wherein the light generating unit comprises a plurality of lamps extended in a first direction, arranged in a second direction substantially perpendicular to the first direction, and disposed between the optical member and the receiving member.

12. The display apparatus of claim 10, wherein the frame member comprises a panel guide portion on which the display panel is disposed.

13. The display apparatus of claim 12, further comprising a top chassis coupled with the frame member to fix the display panel on the frame member.

14. The display apparatus of claim 10, wherein the optical member comprises:

a diffusion plate; and

an optical sheet disposed on the diffusion plate.

15. The display apparatus of claim 14, wherein the protrusion portion includes a multi-tiered protruding structure.

16. The display apparatus of claim 15, wherein the protrusion portion comprises

a guide portion protruded from the supporting part to position the diffusion plate on the supporting portion and

a coupling protrusion protruded from an upper surface of the guide portion and coupled with the optical sheet.

17. The display apparatus of claim 16, wherein the first barrier wall is positioned along the same line as a side surface of the guide portion neighboring the diffusion plate and faces a side surface of the diffusion plate.

18. The display apparatus of claim 16, wherein the optical sheet comprises:

a light transmitting portion corresponding to the diffusion plate; and

a sheet fixing portion extended from the light transmitting portion and disposed on the upper surface of the guide portion, the sheet fixing portion including a fixing hole formed therethrough.