CN101017278A - side lighting back light module - Google Patents
side lighting back light module Download PDFInfo
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- CN101017278A CN101017278A CN 200710085894 CN200710085894A CN101017278A CN 101017278 A CN101017278 A CN 101017278A CN 200710085894 CN200710085894 CN 200710085894 CN 200710085894 A CN200710085894 A CN 200710085894A CN 101017278 A CN101017278 A CN 101017278A
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Abstract
This invention relates to one edge type aphototropism module, which comprises one frame rack, one LED light set and one heat guide structure, wherein, the frame rack has bottom and the side wall from bottom; the LED light source set is inside frame near the end of side wall; the heat structure is set between LED light source set and frame; the heat conductive structure also comprises one body part and one extensive part and the body part is between LED light source set and side wall and extensive part is connected to the body part between LED light source set and bottom part.
Description
Technical field
The present invention relates to a kind of backlight module, particularly a kind of side-light type (EdgeType) backlight module with heat abstractor.
Background technology
Liquid crystal display (LCD) technology is widely used in products such as computer screen, mobile phone, digital camera, Video Camera, PDA.Liquid crystal panel (LCD panel) is crucial display module, yet itself is not luminous, one backlight module (backlight module) need be set just can be shown, backlight module and liquid crystal panel fit together and form a complete LCD MODULE (liquid crystalmodule, LCM).
Please refer to Fig. 1, Fig. 1 is the sectional side view of a known side-light type (Edge type) backlight module.Backlight module 1 comprises a framework 11, at least one led light source group 12 and a light guide plate 13, and wherein led light source group 12 is made up of LED121, circuit board 122 and electric power input media (not shown).Framework 11 is the structures that are made of the upwardly extending sidewall 112 of a base plate 111 and base plate limit, and generally speaking, framework 11 is metal materials.The light inlet side 13a of light guide plate 13 is relative with the light-emitting area of led light source group 12.
Because the heat energy that is produced when the existence of panel driving IC (not shown) and the operation of led light source group is so LED-backlit source one is to the problem that has poor heat radiation.Poor heat radiation not only causes whole backlight module efficient to reduce, and has also reduced average life.Therefore in the slit of circuit board 122 with sidewall 112 adjacents, tend to a Heat Conduction Material (thermal interface material, TIM) 14 fill, wish that heat energy passes to metal framework (heat energy is dispersed direction shown in the arrow among Fig. 1) diffusing to the external world via Heat Conduction Material, and then reach the purpose of heat radiation.
Yet, in the actual conditions, have many structures that other assembly assembling is provided on the metal framework, may be discontinuous constructions such as hole or trip, these discontinuous constructions make thermal energy transfer inhomogeneous, radiating effect is also not as expection.
Shown in Figure 1 is a side light type back light module, if the led light source in the backlight module is that the light time is gone in both sides, the heat energy that led light source when operation produces is the heat energy interference of an end and drive IC therein.Not only the problem of heat radiation can't solve thus, the problem of thermal coupling and mutual heat history also can occur.
Summary of the invention
In view of this, the objective of the invention is to improve the radiating efficiency of side light type back light module, in order to achieve the above object, the design of the present invention by a L type conductive structure makes in the backlight module heat dissipation path change and the heat radiation approach increased.
The objective of the invention is to improve the radiating efficiency of side light type back light module, the design that it can be by a U type conductive structure makes in the backlight module heat dissipation path change and the heat radiation approach is increased.
The present invention discloses a kind of side light type back light module, comprises a framework, a led light source group and a conductive structure.Its middle frame has the bottom and reaches from the upwardly extending sidewall in one side of bottom; The led light source assembly places an end of contiguous aforementioned lateral wall in the framework; Conductive structure is disposed between led light source group and the framework.Conductive structure also comprises a body and an extension, and wherein body is disposed between led light source group and the sidewall; And extension is connected in body, and extends between led light source group and the bottom.
Particularly, the invention provides a kind of side light type back light module, comprising: a framework has: a bottom; And a first side wall, one side extending upward from this bottom; One first led light source group is disposed in this framework, and an end of contiguous this first side wall; One first conductive structure is disposed between this first led light source group and this framework, and this first conductive structure comprises: one first body is disposed between this first led light source group and this first side wall; And one first extension, be connected in this first body, and extend between this first led light source group and this bottom; And a light guide plate, being positioned at this framework, this light guide plate has one first incidence surface, and wherein to be positioned at this first incidence surface other for this first led light source group vicinity.
Preferably, this first body and this first extension are one-body molded.
Preferably, this first body and this first extension constitute L shaped structure.
Preferably, this first body is a upright sheet material, is erected between this led light source group and this first side wall.
Preferably, this first extension is a slab construction, is attached at the upper surface of this bottom, and extend to this first led light source group under.
Preferably, this first led light source group is fixed on this first conductive structure.
Preferably, this framework also has one second sidewall, and this second sidewall extends upward from the another side of this bottom, and this side light type back light module also comprises: one second led light source group is disposed within this framework an end of contiguous this second sidewall; And one second conductive structure, being disposed between this second led light source group and this framework, this second conductive structure comprises: one second body is disposed between this second led light source group and this second sidewall; And one second extension, be connected in this second body, be disposed between this second led light source group and this bottom.
Preferably, the heat-conduction coefficient of this first conductive structure is more than or equal to the heat-conduction coefficient of this second conductive structure.
Preferably, this second body and this second extension are one-body molded.
Preferably, this second body and this second extension constitute L type structure.
Preferably, this first extension at the development length of this base plate greater than this second extension.
Preferably, the thickness of this first conductive structure is greater than the thickness of this second conductive structure.
Preferably, this side light type back light module also comprises one drive circuit, and this driving circuit is positioned on this framework, and the part of this framework is between the part and this driving circuit of this first conductive structure.
Preferably, this first led light source group comprises: a first circuit board; And a plurality of LED, be arranged on this first circuit board.
Preferably, the material of this first circuit board comprises copper clad laminate, epoxy resin, pi, BT resin or benzocyclobutene, strengthening material or combinations thereof.
Preferably, the material of this first conductive structure comprises aluminium, copper or its combination.
Conductive structure in the backlight module disclosed in this invention, its body are a upright sheet material, are erected between led light source group and the sidewall, for the led light source group provides real-time heat radiation approach; Extension is a slab construction, be attached at the bottom upper surface, and extend to the led light source group under, extension is used for providing the internal heat diffusion function for this framed structure.Body and extension constitute a L shaped structure, increase the divergencing path of backlight module internal heat energy effectively, have also improved the efficient of heat radiation further.
Description of drawings
Fig. 1 is the sectional side view of a known side-light type (Edge type) backlight module;
Fig. 2 A is the sectional side view of side-light type disclosed in this invention in the preferred embodiment (Edge type) backlight module;
Fig. 2 B is another form of implementation of assembly extension among the embodiment of Fig. 2 A.
Fig. 3 is in another preferred embodiment, and backlight module disclosed in this invention is applied to the decomposing schematic representation of a flat display apparatus;
Fig. 4 is the side section simplified schematic diagram of display panels 3 and backlight module 5 among Fig. 3;
Fig. 5 A～Fig. 5 B shows the assembling synoptic diagram of backlight module 5 intrawares; And
Fig. 6 is among the embodiment of Fig. 4, and the two ends extension extends to interconnected form of implementation separately.
Wherein, description of reference numerals is as follows:
1 backlight module, 11 frameworks, 12 led light source groups
13 light guide plate, 121 LED, 122 circuit boards
111 base plates, 112 sidewall 13a light inlet sides
14 thermal conducting materials, 2 backlight modules, 21 frameworks
22 led light source groups, 23 light guide plate, 24 conductive structures
211 base plates, 212 sidewall 23a light inlet sides
221 LED, 222 circuit boards, 241 bodies
Frame before 242 extensions, 3 display panels 4
5 backlight modules, 51 blooming pieces, 52 light guide plate
53 first conductive structures, 54 second conductive structures, 55 frameworks
56 first led light source groups, 57 second led light source groups, 531 first bodies
532 first extensions, 541 second bodies, 542 second extensions
551 base plates, 552 the first side walls, 553 second sidewalls
561 the one LED, 562 first circuit boards 571 the 2nd LED
572 second circuit boards, 6 drive IC, 7 Heat Conduction Materials
Embodiment
Please refer to Fig. 2 A, it is side-light type disclosed in this invention in the preferred embodiment (Edge type) backlight module sectional side view.Backlight module 2 comprises a framework 21, at least one led light source group 22, a light guide plate 23 and a conductive structure 24.Its middle frame 21 is structures that are made of the upwardly extending sidewall 212 of base plate 211 and base plate limit, and led light source group 22 is disposed at an end of adjacent sidewall 212 in the framework 21.The light inlet side 23a of light guide plate 23 must fit tightly as far as possible with the light-emitting area position of led light source group 22, so that higher light source utilization ratio to be provided.Conductive structure 24 is disposed between led light source group 22 and the framework 21, is made up of a body 241 and an extension 242, and wherein body 241 is disposed between led light source group 22 and the sidewall 212; And extension 242 connects body 241, and extends between led light source group 22 and the base plate 211.
Led light source group 22 is made up of at least one LED221, a circuit board 222 and electric power input media (not shown), the electric power input media is connected with circuit board 222, wherein circuit board mainly is made up of copper foil material and resin material, and select whether to add strengthening material or highly heat-conductive material according to different demands, in addition can contain other insulation course or welding resisting layer on the circuit board.Wherein copper foil material comprise a copper clad laminate (Copper Clad Laminate, CCL), the material of copper clad laminate comprises a paper substrate plate, a glass cloth substrate or a composite substrate; In preferred embodiment, the paper substrate plate can be a phenol aldehyde type substrate, an epoxy type substrate or a polyester-type substrate, and the material of glass cloth substrate can comprise epoxy resin (fireresist (fire prevention) 4; FR-4, fire resist (fire prevention) 5; FR-5), polyimide resin (PI), BT resin, polyphenylene oxide resin (PPO), poly tetra fluororesin, teflon resin (PTFE), poly-cyanate ester resin, polyolefin resin or combinations thereof; Wherein resin material can be epoxy resin (epoxy), pi (polyimide, PI), BT resin (bismaleimide triazine resin), benzocyclobutene (benzocyclobutene, BCB); And if the adding of strengthening material is arranged, its material can be E level (E-class) or S level (S-class) or the D level (D-class) etc. in the glass fibre.In addition, the material of circuit board 222 can comprise copper clad laminate, epoxy resin, pi, BT resin or benzocyclobutene, strengthening material or combinations thereof.
In addition also can be under with respect to the sheet material of the part other end other metal material of pressing again, to form the metal base circuit board, to reach better radiating effect.
As described in the background art, in the known technology, because the heat energy that is produced when the existence of panel driving IC and the running of led light source group, general LED-backlit source one is to the problem that has poor heat radiation.The present invention wishes the design by conductive structure in the backlight module, effectively solves the problem of poor heat radiation in the known technology.Shown in the embodiment among Fig. 2 A, the conductive structure 24 in the backlight module of the present invention, its body 241 is a upright sheet material, is erected between led light source group 22 and the sidewall 212, for led light source group 22 provides real-time heat radiation approach; Extension 242 is slab constructions, is attached at bottom 211 upper surface, and extend to led light source group 22 under, extension 242 is used for providing the thermal diffusion function for the inside configuration of this framework 21.Body 241 and extension 242 constitutes a L shaped structure, makes in the backlight module heat dissipation path change and makes the heat radiation approach increase (shown in the arrow among Fig. 2 A), also improved the efficient of heat radiation further.
In the backlight module of different size or kind, have radiating requirements in various degree, the length of extension can be adjusted according to actual conditions in the L shaped conductive structure disclosed in this invention.Further with reference to figure 2B, be in the previous embodiment shown in the figure please, extension 242 extends to the form of implementation of other end sidewall 212.Under the bigger situation of radiating requirements, according to inventive concept of the present invention, can further increase heat dissipation path by increasing the expanded range of extension 242, also more improved the efficient of heat radiation.
In the present invention, wish setting by aforementioned L shaped conductive structure, increase the divergencing path of heat energy in the backlight module effectively, wherein the material of conductive structure can comprise the material that aluminium, copper etc. have high good heat-conduction coefficient, and the also visual mould situation of the body of conductive structure and extension is formed in one or make assembling again by separating manufacture process; No matter be material or its manufacture process of conductive structure, be not that the present invention desires the unique point of giving to limit to, so the present invention also no longer add this to discuss.
Fig. 3 is in another preferred embodiment, and backlight module disclosed in this invention is applied to the decomposing schematic representation of a flat display apparatus.Flat display apparatus among Fig. 3 is made up of a display panels 3, one a preceding frame 4 and a backlight module 5.Wherein backlight module 5 comprises a plurality of blooming pieces 51, a light guide plate 52, one first led light source group (not shown), one second led light source group (not shown), one first conductive structure 53, one second conductive structure 54 and a framework 55.Therefore in this embodiment, backlight module 5 is side light type back light modules of two ends light inlet, is provided with two groups of conductive structures and disposes and improve radiating efficiency.
Please further with reference to figure 4, it shown in the figure side section simplified schematic diagram of display panels 3 and backlight module 5 among Fig. 3, mainly be to wish conductive structure is further detailed, therefore the omission of the part assembly of backlight module 5 does not illustrate in the drawings in Fig. 4.As shown in the figure, first conductive structure 53 and second conductive structure 54 are disposed at respectively between the first led light source group 56 and the framework 55 and reach between the second led light source group 57 and the framework 55.Backlight module 5 is by first conductive structure 53 and second conductive structure 54, and the opposite end that can be respectively framework 55 effectively provides the heat radiation approach from the heat energy of led light source group.The structure that framework 55 is made of the upwardly extending sidewall of a base plate 551 and base plate limit, the first led light source group 56 is disposed at an end of a contiguous the first side wall 552 in the framework 55, and the second led light source group 57 is disposed at an end of contiguous one second sidewall 553 in the framework 55.The first led light source group 56 of backlight module 5 is made up of a LED 561, first circuit board 562 and the first electric power input media (not shown), and the second led light source group 57 is made up of the 2nd LED 571, second circuit board 572 and the second electric power input media (not shown).Wherein aforesaid first and second circuit board all mainly comprises a copper clad laminate, and its applicable material can be resilient material and belongs to common practise, described in previous embodiment, repeats no more in this.
First conductive structure 53 is made up of one first body 531 and one first extension 532.Wherein first body 531 is disposed between led light source group 56 and the first side wall 552; And first extension 532 is connected in first body 531, and extends between led light source group 56 and the bottom 551.Second conductive structure 54 is made up of one second body 541 and one second extension 542.Wherein second body 541 is disposed between the led light source group 57 and second sidewall 553; And second extension 542 is connected in second body 541, and extends between led light source group 57 and the bottom 551.It should be noted that in this embodiment the length of second extension 542 of second conductive structure 54 is greater than the length of first extension 532 of first conductive structure 53.
In this embodiment, because light emitting source is the pattern of two ends light inlet, therefore between two groups of led light source groups and light guide plate, all be respectively arranged with the conductive structure of a L type.When the light source of backlight module was the two ends incident type, the problem of thermal coupling and mutual heat history further appearred in the wherein heat energy that produced of the led light source group of the end heat energy interference that can be produced with display panels 3 drive IC 6.In other words, in this embodiment, backlight module 5 is in the heat energy accumulation of the second led light source group, 57 ends, can than first light sources, 56 ends come big, therefore, the length of second extension 542 by increasing by second conductive structure 54 to increase the heat dissipation path in the big zone of this heat energy, has improved the efficient of heat radiation further.In this embodiment, only but the conductive structure with the different length size is used as the form of implementation that elasticity changes, yet the present invention does not desire to limit with this form of implementation of conductive structure, at heat energy accumulation situations different in different types of backlight module, the thickness of its inner conductive structure, material, heat-conduction coefficient, surface treatment or length dimension, all visual actual conditions are adjusted and should be belonged to the included scope of the present invention, get final product the heat-sinking capability that the elasticity adjustment has two ends or do not have equivalence, reach much at one with the temperature of controlling two ends.In preferred embodiment, (thermal interface material, TIM) 7 with the auxiliary radiating efficiency that improves also can to fill thermal conducting material between led light source group and the heat structure according to circumstances.
The conductive structure design of the L type in the backlight module of the present invention, not only can effectively increase the heat energy heat dissipation path of backlight module inside, also further for backlight module providing convenience property when assembling, please refer to Fig. 5 A～Fig. 5 B, shown in the figure is the assembling synoptic diagram of backlight module 5 intrawares.Being different from the known technology with the framework is the form of implementation that bottom is repeatedly put assembly, and the present invention can be earlier with light guide plate 52, led light source group 56﹠amp; 57 and conductive structure 53﹠amp; 54 are fixed together earlier back (shown in Fig. 5 A), are assembled to (shown in Fig. 5 B) in the framework 55 again.As described in the background art, the design size of general framework always can be reserved some surpluses adapting to processing or to assemble needed tolerance fit, so exists the gap to be difficult to avoid in actual conditions between led light source group and the light guide plate.And the benefit of disclosed assembling mode is and can led light source group and light guide plate be assembled earlier by conductive structure among the present invention, and drop to the gap between led light source group and light guide plate minimum even do not have, allow light guide plate 52 try one's best the led light source group 56﹠amp of both sides; 57, higher light source utilization ratio not only can be provided, also can avoid light leakage phenomena simultaneously.
As previously mentioned, the length of extension in the L shaped conductive structure disclosed in this invention is not desired to be limited at this, can in the light of actual conditions and in addition adjust.Please further with reference to figure 6, shown in the figure is among the embodiment of Fig. 4, and first extension 532 and second extension 542 extend to the form of implementation when being connected to each other separately.The length dimension of the extension by adjusting conductive structure, under the prerequisite of being convenient to assemble, the present invention can be effectively at different types of backlight module and different heat energy accumulations, and the enforcement elasticity of the configuration and the adjustment of conductive structure is provided.In addition, also can form first body 531 and second body 541 simultaneously and one-body molded formation one U type conductive structure (not shown).
In sum, backlight module provided by the present invention utilizes the conductive structure of a L type of its inside, has increased the heat dissipation path of internal heat energy and has improved radiating efficiency.In addition, the change of the assembling mode that is caused in backlight module by L type conductive structure has solved the problem of the excesssive gap between the light guide plate and led light source group in the known technology further, has guaranteed the light source utilization ratio, has also avoided light leakage phenomena.
Though the present invention with preferred embodiments openly as above, it is not to be used for limiting design of the present invention and invention entity, only limits to the foregoing description.To those skilled in the art, should understand and utilize other assembly or mode to produce identical effect easily.So under the situation that does not break away from design of the present invention, the modification of being done within the scope of the present invention all should be included in the scope that appending claims defines.
Claims (16)
1. side light type back light module comprises:
One framework has:
One bottom; And
One side one the first side wall is extending upward from this bottom;
One first led light source group is disposed in this framework, and an end of contiguous this first side wall;
One first conductive structure is disposed between this first led light source group and this framework, and this first conductive structure comprises:
One first body is disposed between this first led light source group and this first side wall; And
One first extension is connected in this first body, and extends between this first led light source group and this bottom; And
One light guide plate is positioned at this framework, and this light guide plate has one first incidence surface, and wherein this first led light source group is positioned adjacently at the next door of this first incidence surface.
2. side light type back light module as claimed in claim 1, wherein this first body and this first extension are one-body molded.
3. side light type back light module as claimed in claim 1, wherein this first body and this first extension constitute L shaped structure.
4. side light type back light module as claimed in claim 1, wherein this first body is a upright sheet material, is erected between this led light source group and this first side wall.
5. side light type back light module as claimed in claim 1, wherein this first extension is a slab construction, is attached at the upper surface of this bottom, and extend to this first led light source group under.
6. side light type back light module as claimed in claim 1, wherein this first led light source group is fixed on this first conductive structure.
7. side light type back light module as claimed in claim 1, wherein this framework also has one second sidewall, and this second sidewall extends upward from the another side of this bottom, and this side light type back light module also comprises:
One second led light source group is disposed within this framework, an end of contiguous this second sidewall; And
One second conductive structure is disposed between this second led light source group and this framework, and this second conductive structure comprises:
One second body is disposed between this second led light source group and this second sidewall; And
One second extension is connected in this second body, is disposed between this second led light source group and this bottom.
8. side light type back light module as claimed in claim 7, wherein the heat-conduction coefficient of this first conductive structure is more than or equal to the heat-conduction coefficient of this second conductive structure.
9. side light type back light module as claimed in claim 7, wherein this second body and this second extension are one-body molded.
10. side light type back light module as claimed in claim 7, wherein this second body and this second extension constitute L type structure.
11. side light type back light module as claimed in claim 7, wherein this first extension at the development length of this base plate greater than this second extension.
12. side light type back light module as claimed in claim 7, wherein the thickness of this first conductive structure is greater than the thickness of this second conductive structure.
13. side light type back light module as claimed in claim 1, wherein this side light type back light module also comprises one drive circuit, and this driving circuit is positioned on this framework, and the part of this framework is between the part and this driving circuit of this first conductive structure.
14. side light type back light module as claimed in claim 1, wherein this first led light source group comprises:
One first circuit board; And
A plurality of LED are arranged on this first circuit board.
15. side light type back light module as claimed in claim 14, wherein the material of this first circuit board comprises copper clad laminate, epoxy resin, pi, BT resin or benzocyclobutene, strengthening material or combinations thereof.
16. side light type back light module as claimed in claim 1, wherein the material of this first conductive structure comprises aluminium, copper or its combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710085894 CN101017278A (en) | 2007-03-09 | 2007-03-09 | side lighting back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710085894 CN101017278A (en) | 2007-03-09 | 2007-03-09 | side lighting back light module |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101412703A Division CN101556008B (en) | 2007-03-09 | 2007-03-09 | Assembly method of sidelight-type backlight module |
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| CN101017278A true CN101017278A (en) | 2007-08-15 |
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| CN 200710085894 Pending CN101017278A (en) | 2007-03-09 | 2007-03-09 | side lighting back light module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009076797A1 (en) * | 2007-12-13 | 2009-06-25 | Zhao, Xia | Power led intense light device |
| CN101858533A (en) * | 2009-01-29 | 2010-10-13 | 三星电子株式会社 | Backlight assembly |
| USRE49458E1 (en) | 2009-01-29 | 2023-03-14 | Samsung Display Co., Ltd. | Backlight assembly and display device including the same |
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