Liquid crystal panel assembly and liquid crystal display apparatus having the same

• US 7,864,258 B2
• Filed: 01/11/2007
• Issued: 01/04/2011
• Est. Priority Date: 03/13/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Cho, Jin-hyun, Kang, Joon
• Primary Examiner(s): Nelms; David
• Assistant Examiner(s): NGUYEN, THANH NHAN P
• Application Number:
  US11/652,009
• Publication Number:
  US 20070211191A1
• Time in Patent Office: 1,454 Days
• Field of Search: 349/58, 349/65
• US Class Current: 349/58
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• 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: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133314 Back frames
• CPC Class Codes: G02F 1/133317 Intermediate frames, e.g. between backlight housing and front frame
• CPC Class Codes: G02F 1/133334 Electromagnetic shields
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G02F 1/133628 with cooling means

Abstract

A liquid crystal panel assembly includes a liquid crystal panel, a backlight module having at least one light emitting diode (LED) light source to irradiate light to the liquid crystal panel, and a housing which surrounds the liquid crystal panel and the backlight module. At least a portion of the housing adjacent to the at least one LED light source is formed of a thermal-conductive material.

Claims

1. A liquid crystal panel assembly comprising:

a liquid crystal panel;

a backlight module having at least one light emitting diode (LED) light source which irradiates light to the liquid crystal panel and a light guide plate which guides light from the at least one LED light source; and

a housing which surrounds the liquid crystal panel and the backlight module, wherein at least a portion of the housing adjacent to the at least one LED light source is formed of a thermal-conductive material, wherein the LED light source is disposed on one side of the light guide plate,

wherein the housing comprises a front housing which exposes a screen of the liquid crystal panel to the outside, and a rear housing arranged at a rear side of the backlight module,

wherein the rear housing is formed of a thermal-conductive material, and

wherein the rear housing is arranged to be in contact with a circuit board of the at least one LED light source so that heat is transmitted from the circuit board of the at least one LED light source to the rear housing.

2. The liquid crystal panel assembly as claimed in claim 1, wherein the rear housing part is arranged to surround the at least one LED light source.

3. The liquid crystal display panel according to claim 1, wherein the one side on which the LED light source is disposed is substantially perpendicular to a side of the liquid crystal panel facing the backlight module.

4. The liquid crystal panel assembly according to claim 1, wherein the housing comprises aluminum.

5. The liquid crystal panel assembly according to claim 1, wherein the rear housing comprises an aluminum based material.

6. The liquid crystal panel assembly according to claim 1, wherein the at least one LED light source comprises at least two LED light sources and one of the at least two LED light sources is disposed adjacent to one side of the liquid crystal panel and another of the at least two LED light sources is disposed adjacent to another side of the liquid crystal panel.

7. The liquid crystal panel assembly according to claim 1, wherein the rear housing comprises a first part and a second part.

8. The liquid crystal panel assembly according to claim 7, wherein the first part does not surround the liquid crystal panel.

9. The liquid crystal panel assembly according to claim 1, further comprising a reflective sheet behind the light guide plate wherein a part of the rear housing is disposed behind the reflective sheet.

10. The liquid crystal panel assembly according to claim 1, wherein the at least one LED light source comprises an LED and the circuit board, and wherein the LED is disposed between the circuit board and the light guide plate.

11. A liquid crystal display apparatus comprising:

a liquid crystal panel assembly comprising a liquid crystal panel, and a backlight module having at least one light emitting diode (LED) light source which irradiates light to the liquid crystal panel and a light guide plate which guides light from the at least one LED light source; and

a frame to which the liquid crystal panel assembly is mounted,

wherein at least a portion of the frame is formed of a thermal-conductive material,

wherein the LED light source is disposed on one side of the light guide plate,

wherein the liquid crystal panel assembly further comprises a housing which surrounds at least a portion of the backlight module,

wherein at least a portion of the housing adjacent to the at least one LED light source is formed of a thermal-conductive material,

wherein the housing is arranged to be in contact with at least a portion of the at least one LED light source.

12. The liquid crystal panel assembly according to claim 11, wherein the housing is arranged to be in contact with a circuit board of the at least one LED light source so that heat is transmitted from the circuit board of the at least one LED light source to the housing.

13. The liquid crystal panel assembly according to claim 12, wherein the at least one LED light source comprises an LED and the circuit board, and wherein the LED is disposed between the circuit board and the light guide plate.

14. A liquid crystal panel assembly comprising:

a liquid crystal panel;

a backlight module having at least one light emitting diode (LED) light source which irradiates light to the liquid crystal panel;

a rear housing part which surrounds the at least one LED light source and the backlight module; and

a rear frame part disposed on a rear side of the liquid crystal panel assembly,

wherein at least a portion of the rear housing part and at least a portion of the rear frame part are formed of a thermal-conductive material,

wherein the at least one LED light source is adjacent to the rear housing part and the rear housing part is adjacent to the rear frame part,

wherein the at least one LED light source comprises a plurality of light emitting devices disposed on a circuit board, and

wherein the rear housing part is in direct contact with the circuit board.

15. The liquid crystal panel assembly according to claim 14, wherein the rear housing part is in direct contact with the circuit board of the at least one LED light source so that heat is transmitted from the circuit board of the at least one LED light source to the rear housing part.

16. The liquid crystal panel assembly according to claim 15, wherein the plurality of light emitting devices are disposed between the circuit board and the light guide plate.