CN1501135A - Backlight module - Google Patents
Backlight module Download PDFInfo
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- CN1501135A CN1501135A CNA02150444XA CN02150444A CN1501135A CN 1501135 A CN1501135 A CN 1501135A CN A02150444X A CNA02150444X A CN A02150444XA CN 02150444 A CN02150444 A CN 02150444A CN 1501135 A CN1501135 A CN 1501135A
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- light source
- module backlight
- source generator
- reflecting plate
- plate
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Abstract
The back light assembly set below the display screen includes at least one light source generator, one diffusion board, one light guiding board and one reflecting board. The diffusion board is used to diffuse light from the light source generator to the display screen, the light guiding board is used to diffuse the light to the diffusion board, and the reflecting board is used to reflect the light to the light guiding board and has at least one opening for exhausting heat the light source generator in the back light assembly produces.
Description
Technical field
The invention provides a kind of module backlight (back light module), refer to a kind of module backlight especially with high radiating effect (heat transfer rate).
Background technology
Module backlight is one of key part and component of lcd products, has been widely used at present on digital camera, digital personal assistant (PDA), satellite navigation system, computer monitor and the flat-surface television.Generally speaking, module backlight all is arranged at the below of a display screen (display panel), and have a light source and a diffuser plate (diffusing plate), to provide a light of evenly dispersing, form suitable image by the pixel electrode on the control display screen again to this display screen.Wherein, module backlight can be according to the position of light source, is divided into light source and produces from (direct illuminance) module backlight of the straight-down negative under the display screen or light source near the side-light type the display screen side (edge light) module backlight.And because down straight aphototropism mode set is arranged at light source generator under the display screen, therefore can be applicable to the display screen of higher brightness demand or large-size, for example computer monitor and flat television etc.
Please refer to Fig. 1, Fig. 1 is a kind of diagrammatic cross-section of known module 10 backlight.As shown in Figure 1, module 10 backlight is positioned at the below of a display screen 12, and comprise that 14, one of at least one light source generators (lightsource generator) are arranged at 16, one of diffuser plates (diffusing plate) between light source generator 14 and the display screen 12 and are arranged at light guide plate (lightguide plate between light source generator 14 and the diffuser plate 16, LGP) 18, and be arranged at light source generator 14 belows and be fixed in a reflecting plate (reflecting sheet) 20 on the shell (housing) 22.Wherein, light source generator 14 is to be used to provide a light source to display screen 12, reflecting plate 20 is that the light that is used for light source generator 14 is produced upwards reflects, to increase the utilization rate of light, and then provide a preferable brightness to export, light guide plate 18 be this light source scattering (scatter) of being used for light source generator 14 is produced to diffuser plate 16, diffuser plate 16 can be with the further scattering of light by diffuser plate 16, so that the light of display screen 12 than uniformly dispersing to be provided.And be arranged at reflecting plate 20 belows and coat reflecting plate 20 shell 22 on every side, then be to be used for fixing diffuser plate 16, light guide plate 18, reflecting plate 20 and light source generator 14.In addition, general at least one prism (prism) 24 that above diffuser plate 16, is provided with in addition usually, with the difference of further correction intensity of illumination, the light that display screen 12 is received can have an intensity of illumination distribution uniformly, and prism 24 set quantity and the visual demands of order are changed.
Generally speaking, the light source generator 14 in the module backlight is that (coldcathode fluorescent lamp CCFL) constitute, and each fluorescent tube is arranged with parallel mode by the cold cathode fluorescent lamp pipe mostly.In order to satisfy high brightness and light-weighted requirement, the light source generator 14 in the above-mentioned module 10 backlight often all is installed in the narrow confined space, and therefore the heat that is produced when work often can't distribute and constantly accumulation smoothly.In case the working time is long slightly, be easy to cause near the temperature of fluorescent tube too high, not only can influence the normal operation of display screen 12, and can cause the reduction (for example: the picture of subregion is easy to generate and rocks or phenomenon such as flicker) of display quality, the serviceable life of element around the easier significantly reduction.Therefore the heat radiation that will how to improve module 10 backlight is measured one's own ability, and to increase display quality and to prolong component life, is current important topic really.
Summary of the invention
Therefore fundamental purpose of the present invention is to provide a kind of module backlight (backlight module) with high radiating effect, to solve in the above-mentioned known backlit module the not good problem of radiating effect (heat transfer rate).
In most preferred embodiment of the present invention, this module backlight is the below that is arranged at display screen (display panel).This module backlight comprises at least one light source generator (light source generator), a diffuser plate (diffusing plate), a prism (prism), (light guide plate is LGP) with a reflecting plate (reflecting sheet) for a light guide plate.This light source generator is to be used to provide a light source, and this diffuser plate is arranged between light source generator and the display screen, is used for light source scattering (scatter) to display screen.This prism is arranged at the diffuser plate surface, and this light guide plate is arranged between light source generator and the diffuser plate, is used for the light source that light source generator produces is scattered to diffuser plate.This reflecting plate is arranged at the below of light source generator, in order to source reflection to light guide plate, and this reflecting plate has at least one opening (opening), in order to the heat that light source generator produced of discharging (evolve) this module backlight.
Because the reflecting plate surface of module backlight of the present invention is provided with opening and a plurality of louvre, and said reflection plate has one at least can increase the reflectivity of this reflecting plate and the globoidal structure of area of dissipation, therefore the heat that produced in the course of the work of the light source generator of this module backlight, drained into fast outside this module backlight, effectively improved the radiating effect of this module backlight, therefore can avoid near this light source generator temperature too high and influence the normal operation of display screen, and then guarantee the display quality of element, prolong product serviceable life.
Description of drawings
Fig. 1 is the diagrammatic cross-section of known backlit module.
Fig. 2 is the diagrammatic cross-section of the module backlight of first embodiment of the invention.
Fig. 3 is the amplification profile of the reflecting plate among Fig. 2.
Fig. 4 is the vertical view of the reflecting plate among Fig. 2.
Fig. 5 is the diagrammatic cross-section of the module backlight of second embodiment of the invention.
Fig. 6 is the enlarged diagram of the cylinder among Fig. 5.
Embodiment
Please refer to Fig. 2, Fig. 2 is the diagrammatic cross-section of the module backlight 40 of first embodiment of the invention.As shown in Figure 2, module 40 backlight is arranged at display screen 42 belows, and module 40 backlight comprises that at least one light source generator 44, one are arranged at diffuser plate 46 between light source generator 44 and the display screen 42, one and are arranged at the light guide plate 48 between light source generator 44 and the diffuser plate 46, a reflecting plate 50 that is arranged at light source generator 44 belows, and one be arranged at reflecting plate 50 belows, in order to coat around the reflecting plate 50 and to have the shell 52 of a plurality of first louvres 58.
Generally speaking, light source generator 44 is made of a fluorescent tube, is used to provide the light source (not shown).In the most preferred embodiment of the first embodiment of the present invention, each light source generator 44 is made of a cold cathode fluorescent lamp pipe, and each cold cathode fluorescent lamp pipe is arranged with parallel mode.Reflecting plate 50 is made of aluminum metal or other metal alloys, in order to this source reflection that light source generator 44 is produced to light guide plate 48.In addition, in the first embodiment of the present invention, reflecting plate 50 also can be that the bottom is made up of materials such as foaming PET film or PC resins and surperficial is formed with layer of metal or other have the reflective film that material constituted of highly reflective.As shown in Figure 2, reflecting plate 50 has the globoidal structure 50a of at least one reflectivity that can increase reflecting plate 50 and area of dissipation, and its surface has the below that at least one opening 56 is arranged at each light source generator 44.Light guide plate 48 is to be used for this light source is scattered to diffuser plate 46, and diffuser plate 46 then is to be used for this light source is further scattered to display screen 42.In addition, generally be provided with at least one prism 54 usually in addition above diffuser plate 46, with the difference of further correction intensity of illumination, the light that display screen 42 is received can have an intensity of illumination distribution uniformly, and set quantity and the order of prism 54, visual demand and being changed.
Please refer to Fig. 3 and Fig. 4, Fig. 3 is the amplification profile of reflecting plate 50, and Fig. 4 then is the vertical view of reflecting plate 50.As shown in Figure 3 and Figure 4, the opening 56 on reflecting plate 50 surfaces is a groove (slot), the heat that is produced when the work in order to the light source generator 44 that discharges module 40 backlight, and its shape is corresponding with the shape of each light source generator 44.In addition, reflecting plate 50 includes a plurality of second louvres 60 in addition, therefore the heat that produced of the light source generator 44 of module 40 backlight, be able to mode by convection current, through the opening 56 and second louvre 60 of reflecting plate 50, first louvre 58 through shell 52 drains into outside the module 40 backlight more earlier.
Please refer to Fig. 5, Fig. 5 is the diagrammatic cross-section of the module backlight 70 of second embodiment of the invention.As shown in Figure 5, similar in appearance to the first embodiment of the present invention, module 70 backlight also is to be arranged at display screen 72 belows, and module 70 backlight includes at least one light source generator 74, a diffuser plate 76 that is arranged between light source generator 74 and the display screen 72, at least one is arranged at the prism 84 of the top of diffuser plate 76, a light guide plate 78 that is arranged between light source generator 74 and the diffuser plate 76, a reflecting plate 80 that is arranged at light source generator 74 belows, and one be arranged at reflecting plate 80 belows, in order to coating around the reflecting plate 80 and to have the shell 82 of a plurality of first louvres 88, and the surface of reflecting plate 80 also has the globoidal structure 80a of at least one reflectivity that can increase reflecting plate 80 and area of dissipation, and at least one is arranged at the second louvre (not shown) of the opening 86 and the heat that a plurality of light source generator 74 that discharges module 70 backlight in order to reinforcement is produced of each light source generator 74 below when work.Unique first embodiment of the present invention part that is different from is that then the module backlight 70 in the second embodiment of the present invention includes at least one cylinder 81 in addition, and this cylinder is arranged between light source generator 74 and the reflecting plate 80.Because composition material, structure and functional equivalent light source generator 44, diffuser plate 46, light guide plate 48, reflecting plate 50, shell 52, prism 54, opening 56, first louvre 58 and second louvre 60 in first embodiment of light source generator 74, diffuser plate 76, light guide plate 78, reflecting plate 80, shell 82, prism 84, opening 86, first louvre 88 and this second louvre be not so give unnecessary details separately at this.
Please refer to Fig. 6, Fig. 6 is the enlarged diagram of cylinder 81.As shown in Figure 6, cylinder 81 includes one first end (first end) 81a and one second end (second end) 81b, contacts with reflecting plate 80 with each light source generator 74 respectively.Wherein, the first end 81a includes a rubber blanket 90, the second end 81b and then comprises a metal surface 92.In the most preferred embodiment of the second embodiment of the present invention, metal surface 92 is a silver-plated surface, has excellent thermal conduction capability, and rubber blanket 90 has the function of protection light source generator 74, avoids light source generator 74 impaired because of rocking vibrations.Therefore in the second embodiment of the present invention, the heat that the light source generator 74 of module 70 backlight is produced in work, be the mode of elder generation by convection current and conduction, drain into reflecting plate 80 belows via opening 86, this second louvre and cylinder 81 respectively, by the mode of convection current, discharge module 70 backlight again through first louvre 88.
Compare with known module 10 backlight, because the reflecting plate 50 of module 40 backlight of the present invention and 70 and 80 surfaces are provided with opening 56 and 86 and second louvre 60 (not showing) in the figure of the second embodiment of the present invention, and reflecting plate 50 and 80 has the reflectivity that can increase reflecting plate 50 and 80 and the globoidal structure 50a and the 80a of area of dissipation respectively, so the light source generator 44 and 74 heats that produced at work of module 40 backlight and 70, drained into fast outside module 40 backlight and 70, improved the radiating effect of module 40 backlight and 70 effectively.In addition, the cylinder 81 that module backlight 70 in the second embodiment of the invention is comprised, its the first end 81a and the second end 81b include respectively and can avoid light source generator 74 because of rocking the impaired rubber blanket 90 of vibrations, and metal surface 92 with excellent heat conduction power, therefore can utilize the mode of convection current and conduction simultaneously with working along both lines, the heat that the light source generator 74 of module 70 backlight is produced in work is discharged more efficiently, avoid near the light source generator 74 temperature too high and influence the normal operation of display screen 72, and then guarantee the display quality of element, prolong product serviceable life.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (20)
1. module backlight (back light module) with high radiating effect, this module backlight are arranged at a display screen (displaypanel) below, and this module backlight includes:
At least one light source generator (light source generator) is used to provide a light source;
A diffuser plate (diffusing plate) is arranged between this light source generator and this display screen, and this light source scattering (scatter) that is used for this light source generator is produced is to this display screen;
A prism (prism) is arranged at this diffuser plate surface;
(light guide plate LGP), is arranged between this light source generator and this diffuser plate light guide plate, is used for this light source that this light source generator produces is scattered to this diffuser plate; And
A reflecting plate (reflecting sheet), be arranged at this light source generator below, in order to this source reflection to this light guide plate, and this reflecting plate has at least one opening (opening), in order to the heat that this light source generator produced of discharging (evolve) this module backlight.
2. module backlight as claimed in claim 1, wherein this module backlight includes a shell (housing) in addition, be arranged at this reflecting plate below and coat around this reflecting plate, and this shell has a plurality of first louvres, in order to strengthen the heat that this light source generator produced of this module backlight of discharging.
3. module backlight as claimed in claim 2, wherein the heat that this light source generator produced of this module backlight is the mode by convection current (convection), discharges this module backlight through this opening and this first louvre.
4. module backlight as claimed in claim 1, wherein this opening is arranged under each light source generator.
5. module backlight as claimed in claim 1, wherein this opening on this reflecting plate is a groove (slot), and the shape of each groove is corresponding to the shape of each light source generator.
6. module backlight as claimed in claim 1, wherein this light source generator be a cold cathode fluorescent lamp pipe (cold cathode fluorescent lamp, CCFL).
7. module backlight as claimed in claim 6, wherein each cold cathode fluorescent lamp pipe is to arrange with parallel mode.
8. module backlight as claimed in claim 1, wherein this reflecting plate has at least one globoidal structure, with reflectivity and the area of dissipation that increases this reflecting plate.
9. module backlight as claimed in claim 8, wherein this reflecting plate includes a plurality of second louvres, in order to strengthen the heat that this light source generator produced of this module backlight of discharging.
10. module backlight with high radiating effect, this module backlight are arranged at display screen below, and this module backlight includes:
At least one light source generator is used to provide a light source;
A diffuser plate is arranged between this light source generator and this display screen, is used for this light source that this light source generator produces is scattered to this display screen;
A prism is arranged at this diffuser plate surface;
A light guide plate is arranged between this light source generator and this diffuser plate, is used for this light source that this light source generator produces is scattered to this diffuser plate;
A reflecting plate is arranged at this light source generator below, in order to this source reflection to this light guide plate, and this reflecting plate has at least one opening, in order to discharge the heat that this light source generator produced of this module backlight;
At least one cylinder is arranged between this light source generator and this reflecting plate, and this cylinder includes one first end (first end) and one second end (second end), and this first end contacts with each light source generator, and this second end contacts with this reflecting plate; And
A shell is arranged at this reflecting plate below and coats around this reflecting plate.
11. module backlight as claimed in claim 10, wherein this shell has a plurality of first louvres, in order to strengthen the heat that this light source generator produced of this module backlight of discharging.
12. module backlight as claimed in claim 10, wherein this opening be arranged at each light source generator under.
13. module backlight as claimed in claim 11, wherein this first end includes a rubber blanket (rubber pad), and the surface of this second end is coated with first metal.
14. module backlight as claimed in claim 13, wherein this first metal be silver (silver, Ag).
15. module backlight as claimed in claim 13, wherein the heat that this light source generator produced of this module backlight is the mode by convection current and conduction (conduction), respectively through this opening and this cylinder, discharge this module backlight through this first louvre more earlier.
16. module backlight as claimed in claim 10, wherein this opening on this reflecting plate is a groove, and the shape of each groove is corresponding to the shape of each light source generator.
17. module backlight as claimed in claim 10, wherein this light source generator is a cold cathode fluorescent lamp pipe.
18. module backlight as claimed in claim 17, wherein each cold cathode fluorescent lamp pipe is to arrange with parallel mode.
19. module backlight as claimed in claim 10, wherein this reflecting plate has at least one globoidal structure, with reflectivity and the area of dissipation that increases this reflecting plate.
20. module backlight as claimed in claim 19, wherein this reflecting plate includes a plurality of second louvres, in order to strengthen the heat that this light source generator produced of this module backlight of discharging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02150444 CN1244838C (en) | 2002-11-12 | 2002-11-12 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02150444 CN1244838C (en) | 2002-11-12 | 2002-11-12 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1501135A true CN1501135A (en) | 2004-06-02 |
| CN1244838C CN1244838C (en) | 2006-03-08 |
Family
ID=34233974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02150444 Expired - Lifetime CN1244838C (en) | 2002-11-12 | 2002-11-12 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1244838C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334491C (en) * | 2004-01-15 | 2007-08-29 | 友达光电股份有限公司 | Liquid crystal display and backlight module thereof |
| CN100353230C (en) * | 2005-01-18 | 2007-12-05 | 友达光电股份有限公司 | Backlight assembly |
| CN100374930C (en) * | 2005-03-25 | 2008-03-12 | 友达光电股份有限公司 | Direct type back light unit assembly |
| CN103038703A (en) * | 2010-06-30 | 2013-04-10 | 松下液晶显示器株式会社 | Liquid crystal display device |
| WO2014187074A1 (en) * | 2013-05-22 | 2014-11-27 | 宁波长阳科技有限公司 | Silverplated reflecting film and manufacturing method thereof |
| CN107407749A (en) * | 2015-03-20 | 2017-11-28 | 沙特基础工业全球技术公司 | Including microcellular structure and with the retroreflective articles of improved reflectivity |
-
2002
- 2002-11-12 CN CN 02150444 patent/CN1244838C/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334491C (en) * | 2004-01-15 | 2007-08-29 | 友达光电股份有限公司 | Liquid crystal display and backlight module thereof |
| CN100353230C (en) * | 2005-01-18 | 2007-12-05 | 友达光电股份有限公司 | Backlight assembly |
| CN100374930C (en) * | 2005-03-25 | 2008-03-12 | 友达光电股份有限公司 | Direct type back light unit assembly |
| CN103038703A (en) * | 2010-06-30 | 2013-04-10 | 松下液晶显示器株式会社 | Liquid crystal display device |
| CN103038703B (en) * | 2010-06-30 | 2016-01-20 | 松下液晶显示器株式会社 | Liquid crystal indicator |
| WO2014187074A1 (en) * | 2013-05-22 | 2014-11-27 | 宁波长阳科技有限公司 | Silverplated reflecting film and manufacturing method thereof |
| CN107407749A (en) * | 2015-03-20 | 2017-11-28 | 沙特基础工业全球技术公司 | Including microcellular structure and with the retroreflective articles of improved reflectivity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1244838C (en) | 2006-03-08 |
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Granted publication date: 20060308 |