Backlight assembly comprising a light-sourcing unit fixing frame with a lateral extension portion and a fixing protrusion which interlocks the light-sourcing unit fixing frame to a housing

• US 8,704,974 B2
• Filed: 10/01/2010
• Issued: 04/22/2014
• Est. Priority Date: 10/12/2009
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Noh, Cheol-Yong, Choi, Jae-Chang, Choi, Seong-Sik
• Primary Examiner(s): Lee, Paul
• Application Number:
  US12/896,802
• Publication Number:
  US 20110085107A1
• Time in Patent Office: 1,299 Days
• Field of Search: 349 62- 65, 349/67, 362 971- 974, 362/611, 362/612, 362/613, 362/615, 362632-634
• US Class Current: 349/65
• CPC Class Codes: G02B 6/0081 Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
• 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 6/009 of the light source in the package G02B6/0021 takes precedence
• CPC Class Codes: G02F 1/133314 Back frames

Abstract

A backlight assembly of a Liquid Crystal Display (LCD) is provided with improved heat dissipation capabilities. The improved dissipation capabilities come from one or more light-sourcing unit fixing frames that have extensions which protrude to outside a housing that houses light sourcing units of the LCD. The light-sourcing unit fixing frames mechanically interlock with the housing.

Claims

1. A backlight assembly comprising:

a light sourcing unit which is configured to receive electrical power and produce light;

a light-sourcing unit fixing frame to which the light sourcing unit is fixed and thermally coupled; and

a housing which accommodates the light-sourcing unit fixing frame within an inside portion of the housing and has one or more openings communicating between the inside portion and an outside portion of the housing,

wherein one or more portions of the light-sourcing unit fixing frame extend through the openings from the inside portion to the outside portion of the housing,

wherein the housing comprises a bottom plate portion and sidewall portions extending from the bottom plate portion,

wherein the light-sourcing unit fixing frame comprises a lateral extension portion which is exposed through one of said openings and parallel to the bottom plate portion, a fixing protrusion which mates with a groove or bend or counter-extending portion of the housing to thereby interlock the light-sourcing unit fixing frame in place relative to the housing,

wherein the fixing protrusion of the light-sourcing unit fixing frame extends parallel to the lateral extension portion of the light-sourcing unit fixing frame, and wherein at least part of the bottom plate portion of the housing is inserted between the fixing protrusion and the lateral extension portion;

wherein the light-sourcing unit fixing frame comprises a horizontal portion which extends parallel to the bottom plate portion and the light-sourcing unit fixing frame comprises a vertical portion which extends perpendicular to the horizontal portion,

wherein the lateral extension portion extends from an end of the horizontal portion, and

wherein the fixing protrusion is formed at the end of the horizontal portion.

2. The backlight assembly of claim 1, wherein one of said openings is formed immediately adjacent to one of the sidewall portions of the housing.

3. The backlight assembly of claim 1, wherein the housing further comprises a first bent portion which is inserted between the fixing protrusion and the lateral extension portion of the light-sourcing unit fixing frame.

4. The backlight assembly of claim 1, wherein the light-sourcing unit fixing frame further comprises a first fixing groove into which at least one protrusion of the housing is inserted.

5. The backlight assembly of claim 4, wherein the housing further comprises a second bent portion which is formed as a bent extension of a side of one of the housing openings and the second bent portion defines said at least one protrusion of the housing which is inserted into the first fixing groove.

6. The backlight assembly of claim 1, further comprising an intermediate frame which is disposed over and coupled to the housing.

7. The backlight assembly of claim 6, wherein the light-sourcing unit fixing frame further comprises a second fixing groove into which part of the intermediate frame is inserted.

8. The backlight assembly of claim 1, wherein the vertical portion is exposed outside the housing.

9. The backlight assembly of claim 1, wherein the intermediate frame further comprises an insertion groove into which at least part of the vertical portion is inserted.

10. The backlight assembly of claim 1, wherein the housing and the light-sourcing unit fixing frame are fastened to each other by at least one of welding, screws, and caulking.

11. The backlight assembly of claim 10, wherein the lateral extension portion overlaps at least part of the bottom plate portion, wherein the bottom plate portion and the lateral extension portion are fastened to each other by a screw.

12. The backlight assembly of claim 11, wherein the housing further comprises a protrusion portion formed by protruding a portion of the bottom plate portion, wherein the protrusion portion and the lateral extension portion are coupled to each other by a screw.

13. The backlight assembly of claim 1, wherein the light-sourcing unit fixing frame further comprises a wring insertion groove within which wiring connected to the light sourcing unit passes.

14. The backlight assembly of claim 13, wherein the wiring insertion groove is exposed outside the housing.

15. The backlight assembly of claim 1, wherein the housing further comprises first aperture portions formed at the bottom plate portion and second aperture portions formed at the sidewall portion.

16. The backlight assembly of claim 15, wherein borders of each of the first aperture portions are connected to each other,

wherein all borders of each of the second aperture portions are not connected to each other.

17. The backlight assembly of claim 15, wherein the lateral extension portion is exposed outside of the housing through each of the first aperture portions.

18. The backlight assembly of claim 15, wherein the vertical portion is exposed outside of the housing through at least one of the second aperture portions.