CN1658044A - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN1658044A CN1658044A CN 200510059544 CN200510059544A CN1658044A CN 1658044 A CN1658044 A CN 1658044A CN 200510059544 CN200510059544 CN 200510059544 CN 200510059544 A CN200510059544 A CN 200510059544A CN 1658044 A CN1658044 A CN 1658044A
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- CN
- China
- Prior art keywords
- top board
- plate
- backlight module
- heat radiation
- light emitting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 230000005855 radiation Effects 0.000 claims description 38
- 239000003292 glue Substances 0.000 claims description 26
- 238000009792 diffusion process Methods 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract 4
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
This invention discloses a back light module, including the frame, the luminous source, the reflecting sheet, the diffusion board and the convector radiating channel. The frame has the base plate, the decline plate that connects the base plate and extends upwards, and the top plate that links to the decline plate and parallels the base plate. The base plate, the decline plate and the top plate form a notching space, the luminous source is set in the notching space and supply the light. The reflecting board is under the luminous source and sticks to the base and the decline plates. The diffusion board is on part of the top plate and is above the luminous source. In addition, the convector radiating channel is between the diffusion board and the top plate.
Description
Technical field
The present invention relates to a kind of backlight module, relate in particular to a kind of backlight module that between the top board of diffuser plate and framework, forms the heat radiation convection channel.
Background technology
Along with LCD (liquid crystal display, LCD) manufacturing technology is progressive fast, with and have advantages such as light, thin, power saving and radiationless line, make LCD be widely used in personal digital assistant (personal digital assistant, PDA), in each electronic product such as notebook computer, digital camera, digital camera camera, mobile phone, computer screen and LCD TV.But, need could produce Presentation Function by the light source that backlight module provided because the display panels in the LCD is non-light-emitting display panel.Traditional backlight module comprise framework, reflector plate, a plurality of cold-cathode fluorescence lamp (cold cathode fluorescent lamp, CCFL), diffuser plate and optic film set.Framework has base plate, top board and is connected base plate and the oblique side plate of top board.Base plate, top board and oblique side plate surround concave space.Reflector plate is positioned at following concave space, smooth on chassis base and the oblique side plate of part, and cold-cathode fluorescence lamp is positioned at following concave space, is set at the top of reflector plate, in order to light to be provided.Diffuser plate is arranged on the framework and is positioned at the top of cold-cathode fluorescence lamp, and optic film set is arranged on the diffuser plate.In addition, the edge of diffuser plate contacts with the part top board usually, to seal down the opening of concave space.
Yet cold-cathode fluorescence lamp also can produce high temperature when producing light because the edge of diffuser plate contact and seal the opening of concave space down with the part top board, cause heat that cold-cathode fluorescence lamp produces in following concave space can't loss the external world extremely.Especially under the demand that the briliancy of LCD day by day improves, the raising of cold-cathode fluorescence lamp brightness certainly will will produce more heat, and therefore the interior environment temperature of LCD will increase, thus, the residing operating ambient temperature of cold-cathode fluorescence lamp will improve many, the luminescent quality variation that causes cold-cathode fluorescence lamp is very big to the influence of backlight module running quality.(light emitting diode LED) provides the backlight module of light equally also to have described variety of problems with light emitting diode.
Summary of the invention
Given this, order of the present invention provides a kind of backlight module, it forms the heat radiation convection channel between the top board of diffuser plate and framework, the rapid loss of internal heat that makes backlight module is to extraneous, thereby can avoid because of the too high luminous efficacy that influences light emitting source of backlight module internal temperature, and then can improve the running quality of backlight module greatly.
According to one object of the present invention, a kind of backlight module is proposed, it comprises a framework, a light emitting source, a reflector plate, a diffuser plate and a heat radiation convection channel.Framework has a base plate, a connection base plate and the oblique side plate that stretches upwards and and connects oblique side plate and the top board parallel with base plate, forms concave space by means of base plate, oblique side plate and top board, and light emitting source is placed in down in the concave space, in order to light to be provided.Reflector plate is placed under the light emitting source, and smooth on base plate and oblique side plate.Diffuser plate is placed on the part top board, and is positioned at the top of light emitting source.In addition, the heat radiation convection channel is formed between diffuser plate and the top board.
Wherein, the heat radiation convection channel also can be formed at diffuser plate or top board place.
In addition, another purpose according to the present invention also provides a kind of LCD with described backlight module.
Description of drawings
For described purpose of the present invention, feature and advantage are become apparent, a preferred implementation cited below particularly also describes the present invention in conjunction with the accompanying drawings.
Figure 1A is the LCD fragmentary cross-sectional view of embodiment of the present invention one;
Figure 1B is the face upwarding stereogram of the amplification of the part-structure of the diffuser plate with heat radiation convection channel shown in Figure 1A;
Fig. 2 A is the LCD fragmentary cross-sectional view of embodiment of the present invention two;
Fig. 2 B is the top perspective view of the amplification of the part-structure of the framework with heat radiation convection channel shown in Fig. 2 A.
Description of reference numerals
20,40 LCD
21 display panels
22 backlight modules
23 housings
24,34 frameworks
The 24a base plate
The oblique side plate of 24b
24c, 34c top board
The 24d outer panel
Concave space under the 24e
25 reflector plates
26 light emitting sources
27,37 diffuser plates
27a diffuser plate surface
28 optic film set
29 glue frames
29a glue frame top board
29b glue frame side plate
30,50 heat radiation convection channel
30b runs through through hole
30c is to accessibke porosity
34d top board surface
Embodiment
In order to solve the heat dissipation problem of backlight module, the present invention proposes a kind of backlight module especially, and it comprises a framework, a light emitting source, a reflector plate, a diffuser plate and a heat radiation convection channel.Framework has a base plate, and connects base plate and the oblique side plate that stretches upwards and an oblique side plate of connection and the top board parallel with base plate.Form concave space by means of base plate, oblique side plate and top board, light emitting source is arranged at down in the concave space, in order to light to be provided.Reflector plate is arranged under the light emitting source, and smooth on base plate and oblique side plate.Diffuser plate is arranged on the part top board, and is positioned at the top of light emitting source.In addition, the heat radiation convection channel is formed between diffuser plate and the top board.Thus, the internal heat of backlight module can be extremely extraneous via the rapid loss of heat radiation convection channel, thereby can avoid because of the too high luminous efficacy that influences light emitting source of backlight module internal temperature, and then can improve the running quality of backlight module greatly.Generation type and appropriate location as for the heat radiation convection channel will be that example is illustrated with embodiment one and embodiment two.
Embodiment one
Please refer to Figure 1A, it is the fragmentary cross-sectional view of the LCD of embodiment of the present invention one.In Figure 1A, LCD 20 comprises display panels 21, backlight module 22 and housing 23.Backlight module 22 comprises framework 24, reflector plate 25, at least one light emitting source 26, diffuser plate 27, optic film set 28 and glue frame 29.Framework 24 has base plate 24a, connects base plate 24a and the oblique side plate 24b that stretches upwards and connects oblique side plate 24b and the top board 24c parallel with base plate 24a, forms concave space 24e by means of base plate 24a, oblique side plate 24b and top board 24c.Light emitting source 26 is arranged at down in the concave space 24e, in order to light to be provided.Light emitting source 26 be cold-cathode fluorescence lamp (cold cathode fluorescent lamp, CCFL) or light emitting diode (light emitting diode LED), is that example explains with the cold-cathode fluorescence lamp at this.Reflector plate 25 is arranged at light emitting source 26 times, and smooth on base plate 24a and oblique side plate 24b.Diffuser plate 27 is arranged on the part top board 24c, and is positioned at the top of light emitting source 26.In addition, heat radiation convection channel 30 is formed between diffuser plate 27 and the top board 24c.Optic film set 28 is arranged on the diffuser plate 27, and comprises diffusion sheet and prismatic lens.Engage with glue frame 29 by framework 24, reflector plate 25, light emitting source 26, diffuser plate 27 and optic film set 28 can be interposed between framework 24 and the glue frame 29.
In the present embodiment, heat radiation convection channel 30 is formed at diffuser plate 27 places.Please refer to Figure 1B, this figure is the face upwarding stereogram of amplification of the part-structure of the diffuser plate with heat radiation convection channel shown in Figure 1A.In Figure 1B, diffuser plate 27 has towards the diffuser plate of top board 24c surface 27a, and the edge of diffuser plate surface 27a contact in order to the surface with part top board 24c, therefore, can form the heat radiation convection channel 30 such as breach at the edge of the surperficial 27a of diffuser plate.Certainly, the mode that forms heat radiation convection channel 30 at diffuser plate 27 places is not limited thereto, as long as can make diffuser plate surface 27a that projection or recessed structure are arranged, all can be used as the heat radiation convection channel 30 of diffuser plate 27.
In addition,, display panels 21 can be folded between glue frame 29 and the housing 23, make display panels 21 be arranged on the optic film set 28, and backlight module 22 and display panels 21 combine by the combination of glue frame 29 and housing 23.
In order to increase the heat radiation convection effects of backlight module 20, backlight module 20 also can comprise and run through through hole 30b, runs through through hole 30b and is formed at top board 24c place and communicates with heat radiation convection channel 30.In addition, when glue frame 29 with after framework 24 combines, form between glue frame 29 and the framework 24 communicate with heat radiation convection channel 30 to accessibke porosity 30c, make backlight module 20 internal heat can by convection channel 30 and to the rapid loss of accessibke porosity 30c to the external world.
In the present embodiment, framework 24 also has the outer panel 24d that connects top board 24c and stretch downwards, and glue frame 29 has glue frame top board 29a and glue frame side plate 29b, and housing 23 has housing top board 23a and housing side plate 23b.Glue frame top board 29a is between the top of housing top board 23a, top board 24c and housing side plate 23b, and glue frame side plate 29b is flattened on the outer panel 24d, and has one at interval with the bottom of housing side plate 23b.Therefore, can form accessibke porosity 30c between glue frame top board 29a and the top board 24c and between the bottom of glue frame side plate 29b and housing side plate.Certainly, formed form to accessibke porosity 30c is not limited to this between glue frame 29, housing 23 and the framework 24, as long as can be communicated with dispel the heat convection channel 30 and any of the external world accessibke porosity all can.
Glue frame top board 29a in the sectional view of Figure 1A and glue frame side plate 29b see and are discontinuous structure, the structure but in fact glue frame top board 29a and glue frame side plate 29b can be formed in one, just the linking portion of glue frame top board 29a and glue frame side plate 29b can't show in the sectional view of Figure 1A.
The structure that forms the heat radiation convection channel between the top board of diffuser plate and framework of present embodiment can make the rapid loss of internal heat of backlight module to extraneous, thereby can avoid because of the too high luminous efficacy that influences light emitting source of the internal temperature of backlight module, and then can improve the running quality of backlight module greatly.
Embodiment two
Please refer to Fig. 2 A, it is the fragmentary cross-sectional view of the LCD of embodiment of the present invention two.LCD 40 in the present embodiment is backlight module 32 with the difference of the LCD 20 of embodiment one.Backlight module 22 differences in backlight module 32 and the embodiment one are diffuser plate 37, framework 34 and heat radiation convection channel 50.The parts of all the other same structures are represented with identical Reference numeral, are not repeated them here.
In Fig. 2 A, heat radiation convection channel 50 is formed between the top board 34c of diffuser plate 37 and framework.In the present embodiment, heat radiation convection channel 40 is formed at top board 34c place.So diffuser plate 37 also can not need the heat radiation convection channel 30 as breach and so in the embodiment one.
Please refer to Fig. 2 B, it is the top perspective view of the amplification of the part-structure of the framework with heat radiation convection channel shown in Fig. 2 A.In Fig. 2 B, top board 34c has top board surface 34d, top board surface 34d in order to the edge contact on the surface of diffuser plate 37, top board surface 34d has the heat radiation convection channel 50 as breach and so on.Certainly, the mode that forms heat radiation convection channel 40 at top board 34c place is not limited thereto, as long as can make top board surface 34d that projection or recessed structure are arranged, all can be used as the heat radiation convection channel 30 of top board 34c.
Obviously, those skilled in the art also can understand that present embodiment is not limited thereto, for example, diffuser plate can have at least one first recess, the top board of framework has at least one second recess, and first recess and second recess constitute at least one heat radiation convection channel when diffuser plate is set on the part top board.First recess and second recess can constitute a heat radiation convection channel accordingly, and perhaps, first recess reaches and two recesses can be staggered and constitute two heat radiation convection channel.
The backlight module that embodiment of the present invention is disclosed, because of between the top board of diffuser plate and framework, forming the heat radiation convection channel, the rapid loss of heat that can make backlight module inside is to extraneous, thereby can avoid because of the too high luminous efficacy that influences light emitting source of backlight module internal temperature, and then improve the running quality of backlight module greatly.
In sum; though the present invention is disclosed in preferred implementation; but this is not to be limitation of the present invention; the any technician in this area is under the prerequisite that does not exceed design of the present invention and protection domain; all can make various conversion and retouching, so the scope that protection scope of the present invention should define with appended claim is as the criterion.
Claims (7)
1. backlight module comprises:
One framework, it has a base plate, an oblique side plate and that connects this base plate and stretch upwards
Connect described oblique side plate and the top board parallel, reach by means of described base plate, oblique side plate with this base plate
Top board forms concave space;
One light emitting source, it is arranged in the described concave space down, in order to light to be provided;
One reflector plate, it is arranged under the described light emitting source, and smooth on described base plate and oblique side plate;
One diffuser plate, it is arranged on the described top board of part, and is positioned at the top of described light emitting source;
And
One heat radiation convection channel, it is formed between described diffuser plate and the top board.
2. backlight module as claimed in claim 1, wherein, described heat radiation convection channel is formed at described diffuser plate place.
3. backlight module as claimed in claim 1, wherein, described heat radiation convection channel is formed at described top board place.
4. backlight module as claimed in claim 1 wherein, also comprises consistent reach through hole, and this runs through through hole and is formed at described top board place.
5. backlight module as claimed in claim 1 wherein, also comprises
One glue frame, it engages with described top board, form between this glue frame and the described framework one communicate with described heat radiation convection channel to accessibke porosity.
6. backlight module as claimed in claim 1, wherein, described light emitting source is cold-cathode fluorescence lamp or light emitting diode.
7. LCD, it has backlight module as claimed in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100595446A CN100388078C (en) | 2005-03-29 | 2005-03-29 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100595446A CN100388078C (en) | 2005-03-29 | 2005-03-29 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1658044A true CN1658044A (en) | 2005-08-24 |
| CN100388078C CN100388078C (en) | 2008-05-14 |
Family
ID=35007622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100595446A Expired - Fee Related CN100388078C (en) | 2005-03-29 | 2005-03-29 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100388078C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498409B (en) * | 2007-09-29 | 2012-04-04 | 京东方科技集团股份有限公司 | Backlight device |
| CN104534359A (en) * | 2014-12-25 | 2015-04-22 | 武汉天马微电子有限公司 | Backlight device |
| CN105864687A (en) * | 2013-08-02 | 2016-08-17 | 瑞仪(广州)光电子器件有限公司 | Backlight module |
| CN106168723A (en) * | 2016-07-18 | 2016-11-30 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI240117B (en) * | 2003-05-15 | 2005-09-21 | Au Optronics Corp | Back light unit |
| CN100343729C (en) * | 2003-08-21 | 2007-10-17 | 友达光电股份有限公司 | Planar displaying device installing structure for decreasing thickness of side-wall |
| CN1327275C (en) * | 2003-09-11 | 2007-07-18 | 友达光电股份有限公司 | Backlight assembly |
| CN100351680C (en) * | 2003-11-28 | 2007-11-28 | 友达光电股份有限公司 | Directly-down backlight assembly |
| CN100346214C (en) * | 2004-04-07 | 2007-10-31 | 友达光电股份有限公司 | Backlight modular |
-
2005
- 2005-03-29 CN CNB2005100595446A patent/CN100388078C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498409B (en) * | 2007-09-29 | 2012-04-04 | 京东方科技集团股份有限公司 | Backlight device |
| CN105864687A (en) * | 2013-08-02 | 2016-08-17 | 瑞仪(广州)光电子器件有限公司 | Backlight module |
| CN104534359A (en) * | 2014-12-25 | 2015-04-22 | 武汉天马微电子有限公司 | Backlight device |
| CN106168723A (en) * | 2016-07-18 | 2016-11-30 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100388078C (en) | 2008-05-14 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080514 |