LED BACKLIGHT MODULE HAVING EXTRUSION HOUSING

• US 20120275182A1
• Filed: 02/01/2012
• Published: 11/01/2012
• Est. Priority Date: 04/29/2011
• Status: Abandoned Application

• Current Assignee: Kocam International Company Limited
• Original Assignee: Kocam International Company Limited
• Inventors: Chen, Tsan-Jung
• Application Number:
  US13/364,317
• Publication Number:
  US 20120275182A1
• Time in Patent Office: Days
• US Class Current: 362/602
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G02F 1/133628 with cooling means
• CPC Class Codes: H05K 2201/0999 Circuit printed on or in housing, e.g. housing as PCB; Circuit printed on the case of a component; PCB affixed to housing
• CPC Class Codes: H05K 2201/10106 Light emitting diode [LED]

Abstract

The present invention relates to an LED backlight module having extrusion housing, comprising: an extrusion housing, a circuit layer, a thermal conductive band, an accommodating body, a plurality of LED chips, a first elastic thermal-conductive member, and second elastic thermal-conductive member, wherein the accommodating body has a plurality of through holes for receiving the LED chips, such that the LED chips disposed on the circuit layer can pass through the through holes, respectively, therefore, the LED chips accommodated in the through holes are protected from suffering the impact caused by an external force; Moreover, through the thermal conductive band, the first elastic thermal-conductive member and the second elastic thermal-conductive member, when the LED chips emit light, the heat produced by the LED chips can be effectively dissipated via “double-direction dissipation”, that is, the heat can be dissipated via the front surface and the rear surface of the circuit layer.

Claims

1. An LED backlight module having extrusion housing, capable of being disposed in a main frame of a liquid crystal display, wherein the main frame has a bottom plate and at least one edge, and the LED backlight module having extrusion housing comprising:

an extrusion housing, being disposed on the edge of the main frame, wherein the extrusion housing is made of metal and the surface thereof is processed a surface treatment process, moreover, the extrusion housing having a disposing portion, two protrusion portions and a bottom portion, in which, the disposing portion being connected to the bottom portion and the two protrusion portions being formed on the bottom portion, moreover, both the disposing portion and the bottom portion having a specific thickness;

a circuit layer, being printed on the surfaces of the disposing portion and one of the two protrusion portions;

a thermal conductive band, being disposed on the protrusion portions and the bottom portion, and extendedly disposed on the bottom plate of the main frame;

an accommodating body, being disposed on the disposing portion, and having an accommodating groove and a plurality of through holes opposite to the accommodating groove, wherein a light guide plate is accommodated in the accommodating groove by a light-receiving surface thereof;

a plurality of LED chips, being disposed on the circuit layer and respectively passing through the through holes for emitting light to the light-receiving surface of the light guide plate;

a first elastic thermal-conductive member, being disposed in a first groove formed on the outer surface of the disposing portion; and

a second elastic thermal-conductive member, being disposed in a second groove formed on the outer surface of the bottom portion;

wherein each of the through holes have a specific depth, therefore, the LED chips being buried in the through holes when the LED chips are disposed on the circuit layer and respectively pass through the through holes;

wherein when the LED chips emit the light, the circuit layer printed on the surfaces of the disposing portion and one of the two protrusion portions conducting the heat produced by the LED chips to the thermal conductive band, and then the thermal conductive band further conducts the heat to the bottom plate for evenly distribute the heat on the bottom plate;

moreover, through the first elastic thermal-conductive member and the second elastic thermal-conductive member, the heat can also be simultaneously conducted to the edge and the bottom plate of the main frame, furthermore, the heat may be dissipated to the air via the main frame.

2. The LED backlight module having extrusion housing of claim 1, wherein a plurality of first threaded holes and second threaded holes are formed on the first groove of the disposing portion and the second groove of the bottom portion, respectively, used for securing the extrusion housing on the edge and the bottom plate of the main frame.

3. The LED backlight module having extrusion housing of claim 1, wherein the first elastic thermal-conductive member is cut in to plural segments, moreover, a thin metal layer with high thermal conductivity being covered with the surface of the first elastic thermal-conductive member.

4. The LED backlight module having extrusion housing of claim 1, wherein the second elastic thermal-conductive member is cut in to plural segments, moreover, a thin metal layer with high thermal conductivity being covered with the surface of the second elastic thermal-conductive member.

5. The LED backlight module having extrusion housing of claim 1, further comprising:

a reflecting layer, being disposed in the accommodating body; and

a plurality of insulating members, being respectively disposed in the inner walls of the through holes, wherein when the LED chips are disposed and welding on the circuit layer, the insulating members may prevent the welding solder from diffusing into the through holes.

6. The LED backlight module having extrusion housing of claim 5, wherein the accommodating body is selected from the group consisting of:

metal body, reflective body, and combined body consisting of the metal body and the reflective body.

7. The LED backlight module having extrusion housing of claim 6, wherein one end of the accommodating body is formed with a tassel portion, used for being tightly attached to the light guide plate when the light guide plate is accommodated by the accommodating body, such that the light emitted by the LED chips would not leak via the gap formed between the accommodating groove and the light guide plate.

8. The LED backlight module having extrusion housing of claim 1, wherein the extrusion housing further comprises an extension portion formed on the disposing portion, wherein the circuit layer can also be printed on the surface of the extension portion for expending the circuit area.

9. An LED backlight module 1 having extrusion housing, capable of being disposed in a main frame of a liquid crystal display, wherein the main frame has a bottom plate and at least one edge, and the LED backlight module having extrusion housing comprising:

an extrusion housing, being disposed on the edge of the main frame and having a disposing portion, two protrusion portions, a bottom portion, and an extension portion, wherein the disposing portion is connected to the bottom portion and has a plurality of first openings, the two protrusion portions being formed on the bottom portion, and the extension portion being formed on one end of the disposing portion opposite to one of the two protrusion portions, moreover, both the disposing portion and the bottom portion having a specific thickness;

a first thermal conductive band, being simultaneously attached to the outer surfaces of the disposing portion and the bottom portion of the housing, and having a plurality of second openings respectively opposite to the first openings;

a circuit layer, being disposed on the first thermal conductive band;

a plurality of LED chips, being disposed on the circuit layer and passing through the first openings and the second openings, respectively;

a light guide plate, being embedded into an accommodating space formed by the extension portion and one of the two protrusion portions, wherein the LED chips can emit light to a light-receiving surface of the light guide plate; and

a second thermal conductive band, being made of metal and attached to the surface of the circuit layer, moreover, the end part of the second thermal conductive band being extended to the bottom plate of the main frame and formed to tassel shape;

wherein each of the first openings have a specific depth, therefore, the LED chips being buried in the first openings when the LED chips are disposed on the circuit layer and respectively pass through the first openings;

wherein when the LED chips emit the light, the circuit layer conducting the heat produced by the LED chips to the first thermal conductive band and the second thermal conductive band, and then the first thermal conductive band further conducts the heat to the disposing portion and the bottom portion of the housing, and the second thermal conductive band conducting the heat to the bottom plate of the main frame, therefore, the disposing portion and the bottom portion conducting the heat to the edge and the bottom plate of the main frame for dissipating to the air, moreover, the end tassel of the second thermal conductive band may evenly distribute the heat on the bottom plate.

10. The LED backlight module having extrusion housing of claim 9, wherein a plurality of threaded holes are formed on the groove between the two protrusion portions.

11. The LED backlight module having extrusion housing of claim 9, further comprising:

a reflecting layer, being disposed in the accommodating space; and

a plurality of insulating members, being respectively disposed in the inner walls of the first openings, wherein when the LED chips are disposed and welding on the circuit layer, the insulating members may prevent the welding solder from diffusing into the first openings.

12. An LED backlight module 1 having extrusion housing, capable of being disposed in a main frame of a liquid crystal display, wherein the main frame has a bottom plate and at least one edge, and the LED backlight module having extrusion housing comprising:

an extrusion housing, being disposed on the edge of the main frame, wherein the extrusion housing is made of metal and the surface thereof is processed a surface treatment process, moreover, the extrusion housing having a disposing portion, two protrusion portions and a bottom portion, in which, the disposing portion being connected to the bottom portion and the two protrusion portions being formed on the bottom portion, moreover, both the disposing portion and the bottom portion having a specific thickness;

a circuit layer, being printed on the surfaces of the disposing portion;

a thermally conductive insulating layer, being attached to the surface of the circuit layer and extendedly attached to the inner surface of the extrusion housing, wherein the thermally conductive insulating layer has a plurality of first holes;

a reflector, being disposed on the disposing portion opposite to the circuit layer and having a plurality of second holes, where a first surface of the reflector is printed with a thermal conductive adhesive;

a spacing member, being disposed on a second surface of the reflector and having a plurality of third holes opposite to the second holes;

a plurality of LED chips, being disposed on the circuit layer and sequentially passing through the third holes, the second holes and the first holes for emitting light to a light-receiving surface of a light guide plate; and

a thermal conductive layer, being made of metal and disposed in the outer surface of the extrusion housing, wherein one end of the thermal conductive layer formed with a thermal conductive tassel, used for being attached to the bottom plate as the extrusion housing is disposed in the main frame;

wherein the spacing member has a specific thickness, therefore, the LED chips being buried in the third holes when the LED chips are disposed on the circuit layer and sequentially passing through the third holes, the second holes and the first holes;

wherein when the LED chips emit the light, the circuit layer conducting the heat produced by the LED chips to the thermally conductive insulating layer and the disposing portion, and then the thermally conductive insulating layer and the disposing portion further conduct the heat to the extrusion housing, so as to conduct the heat to the main frame, moreover, the thermal conductive tassel of the thermal conductive layer may evenly distribute the heat on the bottom plate.

13. The LED backlight module having extrusion housing of claim 12, wherein the reflector further comprises:

at least one cut mark, being used for bending the reflector to an accommodating body; and

a reflector tassel, being used for tightly attached to the light guide plate when the light guide plate is inserted into the accommodating body formed by the reflector.

14. The LED backlight module having extrusion housing of claim 12, wherein the extrusion housing further comprises an extension portion formed on the disposing portion.

15. An LED backlight module having extrusion housing, capable of being disposed in a main frame of a liquid crystal display, wherein the main frame has a bottom plate and at least one edge, and the LED backlight module having extrusion housing comprising:

an extrusion housing, being disposed on the edge of the main frame and having a disposing portion, two protrusion portions and a bottom portion, wherein the disposing portion is connected to the bottom portion and has a plurality of first openings, and the two protrusion portions being formed on the bottom portion, moreover, both the disposing portion and the bottom portion having a specific thickness;

a thermally conductive insulating layer, being attached to the surface of the circuit layer and extendedly attached to the outer surface of the extrusion housing and having a plurality of second openings;

a circuit layer, being disposed on the thermally conductive insulating layer;

a reflector, being disposed on the disposing portion opposite to the circuit layer and having a plurality of third openings, where a first surface of the reflector is printed with a thermal conductive adhesive;

a spacing member, being disposed on a second surface of the reflector and having a plurality of fourth openings opposite to the third holes;

a plurality of LED chips, being disposed on the circuit layer and sequentially passing through the fourth openings, the third openings, the first openings, and the second openings for emitting light to a light-receiving surface of a light guide plate; and

a thermal conductive layer, being made of metal and disposed in the outer surface of the circuit layer, wherein one end of the thermal conductive layer formed with a thermal conductive tassel, used for being attached to the bottom plate as the extrusion housing is disposed in the main frame;

wherein the spacing member has a specific thickness, therefore, the LED chips being buried in the fourth openings when the LED chips are disposed on the circuit layer and sequentially passing through the fourth openings, the third openings, the first openings, and the second openings;

wherein when the LED chips emit the light, the circuit layer conducting the heat produced by the LED chips to the thermally conductive insulating layer and the extrusion housing, so as to conduct the heat to the main frame, moreover, the thermal conductive tassel of the thermal conductive layer may evenly distribute the heat on the bottom plate.

16. The LED backlight module having extrusion housing of claim 15, wherein the reflector further comprises:

at least one cut mark, being used for bending the reflector to an accommodating body; and

a reflector tassel, being used for tightly attached to the light guide plate when the light guide plate is inserted into the accommodating body formed by the reflector.

17. The LED backlight module having extrusion housing of claim 15, wherein the extrusion housing further comprises an extension portion formed on the disposing portion.