CN100443996C

CN100443996C - Backlight module

Info

Publication number: CN100443996C
Application number: CNB2006100842734A
Authority: CN
Inventors: 周信宏; 彭中; 刘仁绮
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2006-05-30
Filing date: 2006-05-30
Publication date: 2008-12-17
Anticipated expiration: 2026-05-30
Also published as: CN1851543A

Abstract

The present invention relates to a backlight module. In order to solve the problem of a traditional technology, the backlight module is provided. The present invention comprises a reflecting plate and a plurality of light sources, wherein the reflecting plate comprises at least a bending part which comprises a first side surface and a second side surface; the light sources are arranged on the first side surface and the second side surface.

Description

Backlight module

Technical field

The present invention is about a kind of backlight module, particularly about a kind of backlight module that is provided with conductive structure.

Background technology

With reference to Fig. 1, it shows that tradition is the backlight module 10 of light source with light emitting diode (IED), comprises a reflector 11, a plurality of light source 12 and a sheet material 13.In conventional art, have constant spacing P1 between the light source 12, have a level altitude H1 between sheet material 13 and reflector 11 bottom surfaces.Because single light source 12 is responsible for specific field of illumination A1, so spacing P1 and height H 1 need a fixed ratio, and under this fixed ratio, backlight module 10 can provide uniform light, avoids the generation of bright blanking bar.

In conventional art, the usage quantity of light source (light emitting diode) 12 is too much, thereby causes the raising of cost.Yet, if in traditional design, directly increase the usage quantity of the width of spacing P1, have some field of illumination and do not obtain enough illuminations, and produce defective such as bright blanking bar with minimizing light source (light emitting diode) 12.

Summary of the invention

The present invention promptly solves the problem of conventional art for desire, and a kind of backlight module that provides comprises a reflector and a plurality of light source.Reflector comprises at least one kink, and this kink comprises one first side and one second side.Light source is located on this first side and this second side.

In an embodiment of the present invention, because the illumination of each field of illumination is to be provided simultaneously by a plurality of light sources, therefore, can not obtain the problem of enough illuminations just like some field of illumination of conventional art.And because light source is the form setting to tilt, effectively the field of illumination is quite broad, therefore can reduce the use amount of light source.At this moment, can use the higher light source of power that enough briliancy are provided, can avoid the generation of bright blanking bar, and the more illumination of homogeneous and bright is provided.Simultaneously, the heat that power light source produced can be eliminated through the transmission of reflector.

Description of drawings

Fig. 1 shows traditional backlight module;

Fig. 2 a shows the backlight module top view of first embodiment of the invention;

Fig. 2 b shows the sectional view of the backlight module of first embodiment of the invention;

Fig. 3 a shows the detail structure of conductive structure;

Fig. 3 b shows that the cross section is leg-of-mutton conductive structure;

Fig. 3 c shows that the cross section is the conductive structure of rectangle;

Fig. 4 a shows the conductive structure with heat pipe;

Fig. 4 b shows the conductive structure with fluid passage;

Fig. 4 c shows the situation that working fluid flows in the fluid passage;

Fig. 4 d shows the conductive structure with semicircle fluid passage;

Fig. 5 shows a variation of the present invention;

Fig. 6 a shows the backlight module top view of second embodiment of the invention;

Fig. 6 b shows the sectional view of the backlight module of second embodiment of the invention;

Fig. 7 a shows a variation of second embodiment of the invention;

The sectional view of A-A direction among Fig. 7 b displayed map 7a.

The primary clustering symbol description

10～backlight module; 11～reflector;

12～light source; 13～sheet material;

100～backlight module; 110～reflector;

111～reflective surface; 120～light source;

130～sheet material; 140,140 ', 140 "～conductive structure;

141～the first sides; 142～the second sides;

143～heat pipe; 144～fluid passage;

145～fluid passage; 150～working fluid;

160～diffuser plate; 200～backlight module;

210～reflector; 211～reflective surface;

240～kink; 241～the first sides;

242～the second sides; 250～backboard;

260～runner; 270～working fluid.

Embodiment

With reference to Fig. 2 a and Fig. 2 b, the backlight module 100 that it shows first embodiment of the invention comprises a reflector 110, a plurality of light source 120, a sheet material 130 and a plurality of conductive structure 140.Reflector 110 has a reflective surface 111.Described conductive structure 140 is located on this reflective surface 111, comprises one first side 141 and one second side 142.Described light source 120 promptly is located on this first side 141 and this second side 142.

The material of conductive structure 140 can be metal or pottery.Described light source 120 is light emitting diode (LED).Sheet material 130 can or be a blast sheet for a diffuser plate.

In an embodiment of the present invention, (for example, field of illumination A2) illumination is to be provided simultaneously by a plurality of light sources 120, therefore, can not obtain the problem of enough illuminations just like some field of illumination of conventional art owing to each field of illumination.And because light source 120 is the form settings to tilt, so its effective field of illumination is quite broad, can increase the spacing between the light source 120 through the spacing P2 that increases conductive structure 140, reduces the use amount of light source 120 whereby.At this moment, can use the higher light source of power 120 that enough briliancy are provided, can avoid the generation of bright blanking bar, and the more illumination of homogeneous and bright is provided.Simultaneously, the heat that power light source 120 is produced can be eliminated through the transmission of conductive structure 140.

With reference to Fig. 3 a, conductive structure 140 is that a cross section is trapezoidal cylinder, wherein, has an angle theta between first side 141 and second side 142, between 45 degree are spent to 135.

With reference to Fig. 3 b, it shows a variation of the present invention, wherein, conductive structure 140 ' is that a cross section is leg-of-mutton cylinder, has an angle theta between first side 141 and second side 142, and angle theta is less than 180 degree, in a preferred embodiment, to between 150 degree, in another preferred embodiment, angle theta is between spend to 135 by 45 degree between 30 degree for angle theta.

With reference to Fig. 3 c, it shows another variation of the present invention, wherein, conductive structure 140 " be that a cross section is the cylinder of rectangle, first side 141 and second side 142 are parallel to each other.

With reference to Fig. 4 a, it shows another variation of the present invention, and wherein, conductive structure 140 also comprises a heat pipe (heat pipe) 143, is located in this conductive structure 140, in order to the guiding heat.

With reference to Fig. 4 b, it shows another variation of the present invention, and wherein, conductive structure 140 also comprises a fluid passage 144, flows wherein for a working fluid, with the guiding heat.In this embodiment, the cross section of this fluid passage 144 is circular.Collocation is with reference to Fig. 4 c, and it shows the situation that working fluid 150 flows in fluid passage 144.

With reference to Fig. 4 d, it shows another variation of the present invention, and wherein, conductive structure 140 also comprises a fluid passage 145, flows wherein for working fluid, with the guiding heat.In this embodiment, the cross section of this fluid passage 145 is semicircle.In the present invention, the cross section of fluid passage can also be other shape.In the present invention, working fluid can be gas or liquid.

With reference to Fig. 5, it shows another variation of the present invention, and it also comprises a diffuser plate 160, is located between light source 120 and the sheet material 130, so that more uniform backlight to be provided.

With reference to Fig. 6 a and Fig. 6 b, the backlight module 200 that it shows second embodiment of the invention comprises a reflector 210 and a plurality of light source 120.Reflector 210 has a reflective surface 211 and a plurality of kink 240.Described kink 240 is outstanding towards a light direction x of this backlight module 200.Each kink 240 comprises one first side 241 and one second side 242.Described light source 120 promptly is located on this first side 241 and this second side 242.First side 241 and second side 242 have an angle theta, and angle theta is less than 180 degree, and in a preferred embodiment, between 150 degree, in another preferred embodiment, angle theta is between spend to 135 by 45 degree between 30 degree for angle theta.

In the second embodiment of the present invention, because light source 120 directly is arranged on the kink 240 of reflector 210, therefore, the heat that light source 120 produced can directly see through reflector 210 and transmit and remove, and avoids the phenomenon of heat history to take place.

With reference to Fig. 7 a and Fig. 7 b, it shows a variation of second embodiment of the invention, and wherein, Fig. 7 b is the A-A direction sectional view among Fig. 7 a.In the shown embodiment of Fig. 7 a and Fig. 7 b, it also comprises a backboard 250 and a working fluid 270.Backboard 250 connects reflector 210, simultaneously, is formed with runner 260 between kink 240 and the backboard 250, flows wherein for working fluid 270, whereby further to remove the heat that light source 120 is produced.

Though the present invention with concrete preferred embodiment openly as above; right its is not in order to qualification the present invention, and any insider is in the spirit and scope that do not break away from the present invention's work; still can do a little change and retouching, so protection scope of the present invention is as the criterion when looking claims person of defining.

Claims

1. backlight module comprises:

One reflector comprises a reflective surface;

At least one conductive structure is located on this reflective surface, comprises one first side and one second side; And

A plurality of light sources are located on this first side and this second side.

2. backlight module according to claim 1, wherein, this conductive structure is strip.

3. backlight module according to claim 1, wherein, this conductive structure is that the cross section is leg-of-mutton cylinder.

4. backlight module according to claim 3 wherein, has an angle between this first side and this second side, between 30 degree are spent to 150.

5. backlight module according to claim 3 wherein, has an angle between this first side and this second side, and it is between 45 degree are spent to 135.

6. backlight module according to claim 1, wherein, this conductive structure is that the cross section is the cylinder of rectangle.

7. backlight module according to claim 6, wherein, this first side and this second side are parallel to each other.

8. backlight module according to claim 1, wherein, this conductive structure is that the cross section is trapezoidal cylinder.

9. backlight module according to claim 8 wherein, has an angle between this first side and this second side, and it is between 30 degree are spent to 150.

10. backlight module according to claim 8 wherein, has an angle between this first side and this second side, and it is between 45 degree are spent to 135.

11. backlight module according to claim 1, wherein, this conductive structure comprises a heat pipe, is located in this conductive structure, in order to the guiding heat.

12. backlight module according to claim 1 also comprises a working fluid, wherein, this conductive structure comprises a fluid passage, and this working fluid flows in this fluid passage, in order to the guiding heat.

13. backlight module according to claim 1 also comprises the diffuser plate that is arranged at described light source top.

14. backlight module according to claim 13 also comprises another diffuser plate that is arranged at described light source top.