CN100373234C - Backlight module - Google Patents
Backlight module Download PDFInfo
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- CN100373234C CN100373234C CNB2004100974043A CN200410097404A CN100373234C CN 100373234 C CN100373234 C CN 100373234C CN B2004100974043 A CNB2004100974043 A CN B2004100974043A CN 200410097404 A CN200410097404 A CN 200410097404A CN 100373234 C CN100373234 C CN 100373234C
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- control circuit
- circuit plate
- backlight module
- module
- light source
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Abstract
The present invention relates to a back light module. The present invention comprises a back plate, a control circuit plate module and a light source assembly, wherein the back plate is provided with a first and a second surfaces, and the second surface is provided with a heat radiating structure; the control circuit plate module is partially covered on the first surface of the back plate; the light source assembly comprises a light source body, a plurality of electrodes and a base, the electrodes are electrically connected with the control circuit plate module, and the base contacts the first surface of the back plate.
Description
Technical field
The present invention is relevant for a kind of backlight module, and is particularly to the preferred backlight module of a kind of radiating efficiency.
Background technology
Liquid crystal indicator mainly is to show with a liquid crystal panel (LCD panel), because liquid crystal panel itself can't be luminous, therefore must provide the light source that brightness is abundant and be evenly distributed, and makes normally show image of liquid crystal panel.This one provides the function of light source promptly to be undertaken by (backlight) backlight module.
The pattern of backlight module can be divided into two kinds of side light type back light module and straight-down negative (or claim flat or claim plane formula) backlight modules.The backlight module of two kinds of different types adopts different blooming pieces respectively, and for example, generally with the combination guiding light source of light guide plate and reflector plate, direct type backlight module then evenly spreads light via light diffusing sheet side light type back light module usually.Yet no matter the side-light type or the backlight module of straight-down negative, its structure according to the required blooming piece of pattern, also includes light source that light is provided, control circuit board that the control image shows and as the backboard of supporting construction except above-mentioned.
The light source that is adopted in the backlight module is generally made the pattern of lamp, and it can be light emitting diode (LED) or cold-cathode lamp (Cold Cathode Fluorescent Lamp, CCFL) lamp of different types such as grade.Yet, no matter adopt which kind of lamp as light source, these lamps all can become thermal source in use, produce heat.In addition, control circuit board can adopt for example printed circuit board (PCB) structures such as (PCB), also can produce heat when operation, becomes one of thermal source.Therefore, how improveing the heat dissipation problem of backlight module, produce damage because of thermal source is overheated when avoiding operating, is one of its important topic.
The present structure of general backlight module, its partial structure as shown in Figure 1, light source (lamp) 110 connects with electrode 112 and is arranged on the control circuit board 120,120 of control circuit boards are arranged in the medial surface of backboard 130.For radiating effect is improved, can on control circuit board 120 and backboard 130, get out the louvre 122 and 132 of suitable size respectively, to increase radiating effect.In addition, also can between control circuit board 120 and backboard 130, coat the good coating of thermal conduction effect, or the structures such as radiating gasket of thermal conduction effect preferred material are set, to increase its radiating effect.Yet so radiating effect is still limited.
Summary of the invention
In view of this, a purpose of the present invention promptly is to propose a kind of backlight modular structure, the simple structure that adopts light source contact with backboard, and radiator structure is set at backboard, with the enhancement radiating effect, and the assembly cost of reduction backlight module.
The present invention discloses a kind of backlight module, comprises a backboard, a control circuit plate module and a light source assembly.Backboard has a first surface and a second surface, and second surface is provided with a radiator structure; The control circuit plate module partly is covered in the first surface of backboard; Light source assembly comprises a light source body, a plurality of electrode and a pedestal, and electrode is electrically connected to the control circuit plate module, and pedestal is contacted with the first surface of backboard.
In the above-mentioned backlight module, the control circuit plate module can be arranged to comprise a control circuit board, and this control circuit board has an opening, and light source assembly is striden and is located on the control circuit board, and pedestal passes the first surface that opening is contacted with backboard.In addition, the control circuit plate module also can be arranged to comprise a first control circuit plate and a second control circuit plate, light source assembly is striden and is located on first control circuit plate and the second control circuit plate, electrode is electrically connected to first control circuit plate and second control circuit plate respectively, and pedestal is contacted with the first surface of this backboard between first control circuit plate and the second control circuit plate.
In addition, in the above-mentioned backlight module, the radiator structure of backboard can comprise a plurality of radiating fins that are parallel to each other and are arranged at this second surface, also can comprise a plurality of louvres.In addition, light source can be light emitting diode (LED).
Backlight module of the present invention can be applicable to straight-down negative or side light type back light module.In addition, the first surface of backboard can be arranged to have the structure of protruding position or recessed position, in order to contacting with this pedestal of this light source assembly, and can be provided with a cushion between the first surface of control circuit plate module and backboard.
For above-mentioned and other purpose of the present invention, feature and advantage can be become apparent, several concrete preferred embodiments cited below particularly, and conjunction with figs. describes in detail.
Description of drawings
Fig. 1 is the synoptic diagram of the partial structure of known backlit module.
Fig. 2 is the synoptic diagram of the backlight module of one embodiment of the invention.
Fig. 3 A is the synoptic diagram of control circuit plate module of the backlight module of another embodiment of the present invention.
Fig. 3 B is the front elevation of control circuit plate module among Fig. 3 A.
Fig. 4 A is the synoptic diagram of control circuit plate module of the backlight module of another embodiment of the present invention.
Fig. 4 B is the front elevation of control circuit plate module among Fig. 4 A.
Fig. 4 C is the synoptic diagram of control circuit plate module of the backlight module of another embodiment of the present invention.
Fig. 5 A is the synoptic diagram of control circuit plate module of the backlight module of another embodiment of the present invention.
Fig. 5 B is the synoptic diagram of control circuit plate module of the backlight module of another embodiment of the present invention.
Symbol description
10～light source assembly;
12～electrode;
14～light source body;
16～pedestal;
20～control circuit plate module;
20a～control circuit board;
20b～opening;
22～first control circuit plate;
24～second control circuit plate;
30～backboard;
32～louvre;
35～radiating fin;
50～reflecting plate;
60～cushion;
110～light source assembly;
112～electrode;
120～control circuit board;
122～louvre;
130～backboard;
132～louvre.
Embodiment
Below see also Fig. 2, the structure of backlight module of the present invention is described with an embodiment.The backlight module of present embodiment has at least one light source assembly 10, a control circuit plate module 20 and a backboard 30.The structure of each assembly below is described respectively.
The light emitting diode (LED) that the lamp of light source assembly 10 can adopt general backlight module to adopt, it comprises two electrodes 12, a light source body 14 and a pedestal 16.The electrode 12 of light source assembly 10 is electrically connected to control circuit plate module 20, in order to the power supply of light source assembly 10 to be provided; The lamp socket portion of 16 carryings of pedestal light source body 14.Backboard 30 has a first surface (be among Fig. 2 up side) and a second surface (be among Fig. 2 down side), and is provided with a radiator structure at the second surface of backboard 30, for example a plurality of radiating fins 35 shown in Fig. 2.Radiating fin 35 is parallel to each other and is arranged at the second surface of backboard 30, to promote the radiating effect of backboard 30.Control circuit plate module 20 is by a slice control circuit board at least, and for example printed circuit board (PCB) (PCB) constitutes, and it is arranged at the first surface of backboard 30, but and not exclusively cover backboard 30, only partly be covered in the first surface of backboard 30.As shown in Figure 2, the position of each light source assembly 10 is arranged at the locating of first surface that control circuit plate module 20 does not cover backboard 30, makes the pedestal 16 of light source assembly 10 be contacted with the first surface of backboard 30.
In addition, in the backlight module of present embodiment, have more other the necessary assembly that is provided with according to different backlight module patterns, reflecting plate 50 for example shown in Figure 2, and other blooming piece of icon not, for example light guide plate, light diffusing sheet, prismatic lens or other assembly etc. do not describe in detail one by one at this.
The backlight module of present embodiment, because the pedestal 16 of light source assembly 10 is contacted with the first surface of backboard 30, therefore, the heat that can make light source assembly 10 be produced is directly conducted by backboard 30, cooperate set radiating fin 35 radiator structures such as grade of backboard 30 second surfaces, can obviously promote the radiating efficiency of backlight module.
Particularly, the structure of control circuit plate module 20 can be made of single control circuit board or multi-disc control circuit board.Fig. 3 A and Fig. 3 B display control circuit plate module 20 are by the embodiment that single control circuit board constituted, and the embodiment that Fig. 4 A and Fig. 4 B display control circuit plate module 20 are made of the multi-disc control circuit board.
When control circuit plate module 20 comprises single control circuit board 20a, it can be provided with an opening 20b on control circuit board 20a, the circular open shown in Fig. 3 B for example, certainly this opening 20b is not limited to circle, as long as can hold this pedestal, not influence the degree of stability of whole control circuit board and the easiness of formation opening, all use be can bring, for example polygon, square, rhombus, ellipse or other special shape opening 20b can be arranged to.So, light source assembly 10 can be striden and is located on the control circuit board 20a, and its pedestal 16 passes opening 20b, as shown in Figure 3A, is contacted with the first surface of backboard 30.
In addition, when control circuit plate module 20 comprises the multi-disc control circuit board, for example when first control circuit plate 22 among Fig. 4 A and Fig. 4 B and second control circuit plate 24, shown in Fig. 4 A, the first surface that has a part of backboard 30 between first control circuit plate 22 and the second control circuit plate 24 not Be Controlled circuit board covers.So, light source assembly 10 can be striden and is located on first control circuit plate 22 and the second control circuit plate 24, its electrode 12 is shown in Fig. 4 B, be electrically connected to first control circuit plate 22 and second control circuit plate 24 respectively, and its pedestal 16 is contacted with the first surface of unlapped backboard 30 between first control circuit plate 22 and the second control circuit plate 24 shown in Fig. 4 A.Certainly, the electrode 12 of light source assembly 10 also can be electrically connected on first control circuit plate or the second control circuit plate, according to the arrangement of light source assembly 10 and the circuit design on the control circuit module and different electrode connection mode exists.
In the foregoing description, the configuration of electrode 12 can be according to the design of control circuit board, and adopts the configuration with noble potential, or adopts high and low current potential ways of connecting to carry out.
In this mandatory declaration, among Fig. 2, backboard 30 with a plurality of radiating fins 35 of being parallel to each other and being arranged at second surface as radiator structure.Yet the present invention can be according to the different structure and the pattern of backlight module, and the parameters such as different capacity of light source assembly 10 are as reference value, and adopts other radiator structure, is not limited to the pattern of radiating fin 35.For example, among Fig. 3 A, backboard 30 contacts with the pedestal 16 of light source assembly 10 locates to be provided with a plurality of louvres 32.
In addition, for the pedestal 16 that makes light source assembly 10 contacts with the first surface of backboard 30, the first surface of backboard 30 can be arranged to have the structure of protruding position or recessed position according to the lamp size of Different Light 10 or base height.For example, among Fig. 4 A, the first surface of unlapped backboard 30 promptly has the structure or a plurality of the structures of protruding positions at a protrusion position between first control circuit plate 22 and the second control circuit plate 24, so that the pedestal 16 of light source assembly 10 can contact fully with the first surface of backboard 30.Fig. 5 A then shows another embodiment that adopts single control circuit board 20a, the first surface of its dorsulum 30 is arranged to have the structure at a recessed position or the structure at a plurality of recessed positions, so that the pedestal 16 of light source assembly 10 can contact fully with the first surface of backboard 30.
In addition, in the backlight module of the present invention, further promote, also can set up a cushion 60 at the first surface and the control circuit board intermodule of backboard for making radiating efficiency.For example, the embodiment shown in Fig. 4 C, similar to the embodiment of Fig. 3 A, the control circuit plate module 20 that all adopts single control circuit board 20a to constitute, the embodiment shown in Fig. 5 B, then similar to the embodiment of Fig. 5 A.The difference of the foregoing description is that among Fig. 4 C and Fig. 5 B, 20 of the first surface of backboard 30 and control circuit plate module are provided with a cushion 60.Whether this cushion 60 can be that conduction decides the cushion 60 that uses which kind of material according to the base 16 of this light source assembly 10, when the base 16 of light source assembly 10 was constituted by conductive material, then cushion 60 can be the material (for example: a refrigerating sheet or be the co-polymer of matrix or similar material (PPS) with polyphenylene sulfide (polyphenylene sulphide)) of insulativity and high thermoconductivity; If when the base 16 of light source assembly 10 was constituted by non-conducting material, then this cushion 60 can be a heat sink material (for example: metal or metal alloy or materials similar).
In the backlight module of the present invention,, therefore can obviously promote radiating effect because the pedestal 16 of light source contacts with backboard.In addition, the present invention only need see through and dig out opening on control circuit board, or adopt pattern such as multi-disc control circuit board, the pedestal of light source is contacted with backboard, therefore do not need to make great change for the arrangement of components or the size of backlight module, promptly in the arbitrary pattern applicable to direct type backlight module or side light type back light module, and its assembly and disassembly are all very easy, can reduce the assembly cost of backlight module.In addition, backlight module of the present invention can adopt general light emitting diode (LED) commonly used as light source according to the pattern of backlight module, therefore can not increase extra manufacturing cost.
Though though the present invention with preferred embodiment openly as above; right its is not in order to limit the present invention; any those skilled in the art; under the situation that does not break away from the spirit and scope of the present invention; can change and modification, so protection scope of the present invention is as the criterion with the claim institute restricted portion that is proposed.
Claims (16)
1. backlight module comprises:
One backboard has a first surface and a second surface;
One radiator structure is arranged on this second surface;
One control circuit plate module partly is covered on this first surface; And
One light source assembly comprises a light source body, a plurality of electrode and a pedestal,
Wherein these a plurality of electrodes are electrically connected to this control circuit plate module, and this pedestal is contacted with on this first surface, and
Wherein this light source body is a light emitting diode.
2. backlight module as claimed in claim 1, wherein this control circuit plate module comprises a control circuit board, and this control circuit board has an opening, and this light source assembly is striden and is located on this control circuit board, and this pedestal passes this opening and is contacted with this first surface.
3. backlight module as claimed in claim 2, wherein the shape of this opening comprises circle, quadrilateral or polygon.
4. backlight module as claimed in claim 1, wherein this control circuit plate module comprises a first control circuit plate and a second control circuit plate, this light source assembly is striden and is located on this first control circuit plate and this second control circuit plate, these a plurality of electrodes are electrically connected to this first control circuit plate and this second control circuit plate respectively, and this pedestal is contacted with this first surface between this first control circuit plate and this second control circuit plate.
5. backlight module as claimed in claim 1, wherein this control circuit plate module comprises a first control circuit plate and a second control circuit plate, this light source assembly is striden and is located on this first control circuit plate and this second control circuit plate, these a plurality of electrodes are electrically connected to this first control circuit plate or this second control circuit plate, and this pedestal is contacted with this first surface between this first control circuit plate and this second control circuit plate.
6. backlight module as claimed in claim 1, wherein this radiator structure comprises a plurality of radiating fins, is parallel to each other and is arranged at this second surface.
7. backlight module as claimed in claim 1, wherein this radiator structure comprises a plurality of louvres.
8. backlight module as claimed in claim 1, wherein this backlight module is a bottom-lighting type back light module.
9. backlight module as claimed in claim 1, wherein this backlight module is a side light type back light module.
10. backlight module as claimed in claim 1, wherein this first surface is arranged to have the structure of protruding the position, and contacts with this pedestal.
11. backlight module as claimed in claim 1, wherein this first surface is arranged to have the structure at recessed position, and contacts with this pedestal.
12. backlight module as claimed in claim 1, wherein this first surface and this control circuit board intermodule are provided with a cushion.
13. backlight module as claimed in claim 12, wherein this cushion is a heat sink material.
14. backlight module as claimed in claim 13, wherein this heat sink material comprises metal or metal alloy.
15. backlight module as claimed in claim 12, wherein this cushion is the material of insulativity and high thermoconductivity.
16. backlight module as claimed in claim 15, wherein the material of this insulativity and high thermoconductivity comprises a refrigerating sheet or a polyphenylene sulfide is the co-polymer of matrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100974043A CN100373234C (en) | 2004-11-29 | 2004-11-29 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100974043A CN100373234C (en) | 2004-11-29 | 2004-11-29 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1614477A CN1614477A (en) | 2005-05-11 |
| CN100373234C true CN100373234C (en) | 2008-03-05 |
Family
ID=34766598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100974043A Active CN100373234C (en) | 2004-11-29 | 2004-11-29 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100373234C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060120373A (en) * | 2005-05-19 | 2006-11-27 | 삼성전자주식회사 | Back light unit and liquid crystal display apparatus employing the same |
| CN100342275C (en) * | 2005-06-21 | 2007-10-10 | 友达光电股份有限公司 | Backlight module and light source module |
| CN100405150C (en) * | 2005-09-02 | 2008-07-23 | 鸿富锦精密工业（深圳）有限公司 | Heat radiation module set and straight down type backlight system using same |
| CN100365486C (en) * | 2005-09-23 | 2008-01-30 | 友达光电股份有限公司 | Backlight module |
| CN104359047A (en) * | 2014-10-21 | 2015-02-18 | 上海大京光电科技有限公司 | LED backlight source system |
| CN105652514A (en) * | 2015-11-13 | 2016-06-08 | 乐视致新电子科技（天津）有限公司 | Backlight module set and liquid crystal display equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS635321A (en) * | 1986-06-25 | 1988-01-11 | Mitsubishi Electric Corp | Liquid-crystal display |
| JPH02157789A (en) * | 1988-12-09 | 1990-06-18 | Toshiba Corp | Back-light device |
| US5070431A (en) * | 1989-08-03 | 1991-12-03 | Pioneer Electronic Corporation | Display board illuminating device for passive displays |
| US5283674A (en) * | 1991-09-30 | 1994-02-01 | Sony Corporation | Backlight apparatus having ventilating holes for liquid crystal display |
| CN1542514A (en) * | 2003-04-30 | 2004-11-03 | 友达光电股份有限公司 | Back light module |
| CN1549030A (en) * | 2003-05-22 | 2004-11-24 | 友达光电股份有限公司 | Backlight module |
-
2004
- 2004-11-29 CN CNB2004100974043A patent/CN100373234C/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS635321A (en) * | 1986-06-25 | 1988-01-11 | Mitsubishi Electric Corp | Liquid-crystal display |
| JPH02157789A (en) * | 1988-12-09 | 1990-06-18 | Toshiba Corp | Back-light device |
| US5070431A (en) * | 1989-08-03 | 1991-12-03 | Pioneer Electronic Corporation | Display board illuminating device for passive displays |
| US5283674A (en) * | 1991-09-30 | 1994-02-01 | Sony Corporation | Backlight apparatus having ventilating holes for liquid crystal display |
| CN1542514A (en) * | 2003-04-30 | 2004-11-03 | 友达光电股份有限公司 | Back light module |
| CN1549030A (en) * | 2003-05-22 | 2004-11-24 | 友达光电股份有限公司 | Backlight module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1614477A (en) | 2005-05-11 |
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