CN101140057A - Back light source of planar display heat radiating device - Google Patents
Back light source of planar display heat radiating device Download PDFInfo
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- CN101140057A CN101140057A CNA2006101268319A CN200610126831A CN101140057A CN 101140057 A CN101140057 A CN 101140057A CN A2006101268319 A CNA2006101268319 A CN A2006101268319A CN 200610126831 A CN200610126831 A CN 200610126831A CN 101140057 A CN101140057 A CN 101140057A
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Abstract
The invention relates to a back light source radiating device for a flat plane display, which comprises at least a back light unit, a circuit board and a radiating base plate. The back light unit and the circuit board commonly form a back light source module. The back light unit is provided with a luminous element and a heat conducting part, and the heat conducting part is arranged on one end of the luminous element in order to absorb the heat energy produced by the luminous element. The circuit board is arranged on the back of the radiating base plate, and the heat conducting part of the back light unit is directly stuck on the back of the radiating base plate through at least one assembly hole of the circuit board, thereby rendering the radiating base plate directly absorbing and dissipating the heat energy produced by the back light source module.
Description
Technical field
The present invention is a kind of backlight heat abstractor of flat-panel screens, particularly about on circuit board, offering at least one assembly hole, and a heat-conducting part of at least one back light unit directly amplexiforms the back side in heat-radiating substrate via this assembly hole, reaches the backlight heat abstractor of the flat-panel screens that promotes radiating efficiency.
Background technology
The backlight heat abstractor of existing flat-panel screens please refer to shown in Figure 1ly, and it comprises several back light units 6, circuit board 7, support frame 8 and heat-radiating substrate 9.This back light unit 6 is arranged at a side of circuit board 7, and electrically connects with this circuit board 7, so that provide backlight by these circuit board 7 these back light units 6 of control.This back light unit 6 has pedestal 61, light-emitting component 62 and at least two pole pieces 63.This pedestal 61 is provided with the accommodation space (not shown), this light-emitting component 62 of ccontaining location and pole piece 63.This light-emitting component 62 can be selected light emitting diode (LED) for use, so that enough light sources to be provided.This pole piece 63 is made by the conducting metal material, and this pole piece 63 is arranged in the side of this pedestal 61, and this pole piece 63 electrically connects with this light-emitting component 62.
Referring again to shown in Figure 1, this circuit board 7 is selected flexible printed wiring board for use, and this back light unit 6 utilizes this pole piece 63 to be electrically connected at a side of this circuit board 7.This support frame 8 is provided with accommodation space 80, ccontaining this back light unit 6 and circuit board 7.This heat-radiating substrate 9 is made by the metal material of the aluminium or the contour capacity of heat transmission of copper, and it is incorporated into a side of this support frame 8, and this circuit board 7 amplexiforms with this heat-radiating substrate 9 mutually via this accommodation space 80.
Light-emitting component 62 generation backlights confession flat-panel screens (flat paneldisplay) (not shown) when this back light unit 6, during show image, the heat energy that this light-emitting component 62 produces is passed to this circuit board 7 via heat exchange pattern, then absorbs heat energy on this circuit board 7 indirectly by the metal material of this heat-radiating substrate 9 again.Because a side of the heat-radiating substrate 9 of this high capacity of heat transmission is provided with several fin structure (not shown), and then increase the heat exchange area of this heat-radiating substrate 9 and air, so that fast the heat energy that absorbs is released in the atmosphere, further reaches the effect that cools fast.
Generally speaking, the backlight heat abstractor of above-mentioned existing flat-panel screens has following shortcoming, because being this heat-radiating substrate 9 of direct contact, this back light unit 6 do not carry out the heat exchange action, but by this circuit board 7 thermal energy conduction to this heat-radiating substrate 9 that this back light unit 6 produces is dispelled the heat indirectly, so that significantly reduced the radiating efficiency of this back light unit 6.Moreover these circuit board 7 major parts are selected flexible printed wiring board for use, and the material of its structure (for example: glass fibre etc.), cause reducing the heat transfer efficiency of this circuit board 7, and then reduce the radiating efficiency of this back light unit 6 must contain the lower material of the capacity of heat transmission.For these reasons, be necessary further to improve the backlight heat abstractor of above-mentioned existing flat-panel screens really.
Summary of the invention
Main purpose of the present invention provides a kind of backlight heat abstractor with the flat-panel screens that promotes the backlight heat radiation function.
Secondary objective of the present invention provides a kind of backlight heat abstractor that promotes the backlight heat radiation function and assemble more firm flat-panel screens that has.
The present invention is achieved in that
A kind of backlight heat abstractor of flat-panel screens, it includes at least one back light unit, and it is provided with a light-emitting component and a heat-conducting part that absorbs heat energy that this light-emitting component produces; A circuit board, it is provided with at least one assembly hole, and this circuit board and the electric connection of this back light unit, constitutes backlight module; At least one heat-radiating substrate, wherein, this circuit board is arranged at the back side of this heat-radiating substrate, and the heat-conducting part of this back light unit directly is attached at the back side of this heat-radiating substrate by the assembly hole of this circuit board, and this heat-radiating substrate directly absorbs by this heat-conducting part and disperses the heat energy that this backlight module produces.
According to the backlight heat abstractor of flat-panel screens of the present invention, it comprises at least one back light unit, at least one circuit board and at least one heat-radiating substrate.This back light unit and circuit board constitute backlight module jointly.This back light unit is provided with light-emitting component and heat-conducting part, and this heat-conducting part is arranged at an end of this light-emitting component, to absorb the heat energy that this light-emitting component produces.This circuit board is arranged at the back side of this heat-radiating substrate, and the heat-conducting part of this back light unit directly is attached at the back side of this heat-radiating substrate by at least one assembly hole of this circuit board, so that this heat-radiating substrate directly absorbs and disperses the heat energy that this backlight module produces.
The invention has the beneficial effects as follows:
1, by offering at least one assembly hole, and respectively a heat-conducting part of at least one back light unit directly is attached at the back side of at least one heat-radiating substrate via this assembly hole, is convenient to promote radiating efficiency at least one circuit board.
2, this heat-conducting part has predetermined height difference in the bottom of this back light unit pedestal relatively, this predetermined height difference is not less than the thickness in this assembly hole, so that this heat-conducting part is attached at the back side of this heat-radiating substrate closely via this assembly hole, further promote the assembling reliability.Thus, the present invention can effectively promote the backlight radiating efficiency really, and then prolongs the service life of flat-panel screens.
Description of drawings
Fig. 1: the three-dimensional exploded view of the backlight heat abstractor of existing flat-panel screens.
Fig. 2: the solid of the backlight heat abstractor of first embodiment of the invention midplane display is decomposed and partial enlarged drawing.
Fig. 3: the assembled sectional view of the backlight heat abstractor of first embodiment of the invention midplane display.
Fig. 4: the three-dimensional exploded view of the backlight heat abstractor of first embodiment of the invention midplane display.
Fig. 5: the backlight heat abstractor of first embodiment of the invention midplane display and the three-dimensional exploded view of radiator fan.
Fig. 6: the backlight heat abstractor of first embodiment of the invention midplane display and the assembled sectional view of radiator fan.
Fig. 7: the three-dimensional exploded view of the backlight heat abstractor of second embodiment of the invention midplane display.
Fig. 8: the assembled sectional view of the backlight heat abstractor of second embodiment of the invention midplane display.
The specific embodiment
For above-mentioned and other purpose, technical characterictic and advantage of the present invention can be become apparent, preferred embodiment of the present invention cited below particularly, and conjunction with figs. are described in detail below:
Please refer to shown in Fig. 2,4, in the first embodiment of the invention, preferable flat-panel screens a (the flat panel display that is incorporated into of the backlight heat abstractor of flat-panel screens, FPD) the back side, this flat-panel screens a is preferable select for use LCD (liquid crystal display, LCD) or plasma display panel (plasma display panel, PDP) etc., so that light backlight is provided, the action of dispelling the heat simultaneously.
Please refer to shown in Fig. 2-3, in the first embodiment of the invention, the backlight heat abstractor of flat-panel screens comprises at least one backlight module 1, support frame 2 and at least one heat-radiating substrate 3, this backlight module 1 and this support frame 2 closely are attached at the back side of this heat-radiating substrate 3, so that to this flat-panel screens a action of dispelling the heat.This backlight module 1 has at least one back light unit 11 and a circuit board 12, and this back light unit 11 electrically connects with this circuit board 12, and the luminous action by these circuit board 12 these back light units 11 of control provides backlight.These circuit board 12 preferable flexible printed wiring boards of selecting for use, but also can select rigid printed circuit board for use.This circuit board 12 is offered at least one assembly hole 121, amplexiforms mutually with this heat-radiating substrate 3 by this assembly hole 121 for this back light unit 11.
Shown in Fig. 2-3, in the first embodiment of the invention, support frame 2 has at least one accommodation space 20, and a side of this support frame 2 is in order in conjunction with this heat-radiating substrate 3, and opposite side is in order in conjunction with this flat-panel screens a.More in detail, this support frame 2 is preferable to be made by the high-termal conductivity metal or alloy, for example: and aluminium, copper, gold, silver or its alloy etc., but also can select to make by nonmetallic materials, for example: plastics or foam etc.The shape of these accommodation space 20 relative these backlight modules 1 is opened on this support frame 2, and this accommodation space 20 is in order to assemble ccontaining this backlight module 1, so that outside this this support frame 2 of backlight module 1 unlikely protrusion.
Shown in Fig. 2-3, in the first embodiment of the invention, heat-radiating substrate 3 is made by high-termal conductivity metal or alloy material, for example: aluminium, copper, gold, silver or its alloy etc.The front of this heat-radiating substrate 3 is provided with several heat radiation conduit 31 and several radiating fins 32.This radiating fin 32 vertically is convexly equipped with the front that is arranged in this heat-radiating substrate 3 with respect to this heat-radiating substrate 3, and is formed with this heat radiation conduit 31 between each two adjacent these radiating fin 32, and this heat radiation conduit 31 is vertically arranged with respect to this heat-radiating substrate 3.Can increase the heat exchange area of this heat-radiating substrate 3 and air by this heat radiation conduit 31 and radiating fin 32, to disperse the heat energy that this heat-radiating substrate 3 absorbs.
Shown in Fig. 2-3, in the first embodiment of the invention, back light unit 11 respectively is provided with pedestal 111, light-emitting component 112, at least two lead pieces 113 and heat-conducting parts 114.The center of this pedestal 111 has the accommodation space (not shown), and it can be for being installed with this light-emitting component 112 of location and this heat-conducting part 114.This light-emitting component 112 preferable light emitting diode (LED), particularly white light emitting diode of selecting for use.This lead piece 113 is made by the metal material of the high conductive capability of tool, for example: copper, silver or its alloy etc., this lead piece 113 is arranged in the side of this pedestal 111, and the one end electrically connects with the light-emitting component 112 that is positioned at this pedestal 111, and the other end is in order to electrically connect this circuit board 12.This heat-conducting part 114 selects for use the metal or alloy material of the high capacity of heat transmission of tool to make, for example: aluminium, copper, gold, silver or its alloy etc.This heat-conducting part 114 selects to be arranged at the bottom of this pedestal 111, the one end contacts with this light-emitting component 112, the other end relatively bottom of this pedestal 111 protrudes and is exposed to the outside, this heat-conducting part 114 forms the predetermined height difference (not shown) with the bottom of this pedestal 111, this predetermined height difference is not less than the thickness of the assembly hole 121 of this circuit board 12, and the diameter of this assembly hole 121 is greater than the diameter of this heat-conducting part 114, so that this heat-conducting part 114 just can amplexiform in the back side of this heat-radiating substrate 3 by this assembly hole 121.
Shown in 2-4 figure, during the backlight heat abstractor of the flat-panel screens in using first embodiment of the invention, a side of this support frame 2 is incorporated into the back side of this flat-panel screens a.The light-emitting component 112 emission backlights of this back light unit 11 are for this flat-panel screens a show image, and simultaneously, this light-emitting component 112 also produces heat energy.Because heat-conducting part 114 correspondences of this back light unit 11 are passed the back side that the assembly hole 121 of this circuit board 12 directly is attached at this heat-radiating substrate 3, make the heat-conducting part 114 of this back light unit 11 absorb the heat energy that this light-emitting component 112 is produced by heat exchange pattern, and via the high capacity of heat transmission of this heat-conducting part 114 itself, directly with thermal energy conduction to this heat-radiating substrate 3.Thus, the present invention can effectively promote the radiating efficiency of this backlight module 1 really.
Moreover, please refer to shown in Fig. 5-6, in the first embodiment of the invention, other is provided with several radiator fans b, arranges because this heat radiation conduit 31 and radiating fin 32 relative these heat-radiating substrates 3 form vertically, therefore, help producing thermal convection current, to promote radiating efficiency by the convective principles that hot-air rises.By this, the preferable selection of this radiator fan b is arranged at the below of this heat-radiating substrate 3, and the air outlet (not shown) of this radiator fan b also is somebody's turn to do the channel direction setting of heat radiation conduit 31 relatively, so that quicken cross-ventilation in this heat radiation conduit 31, and then promote the radiating efficiency of this heat-radiating substrate 3 by this fan Hot-air fan b.
Please refer to shown in Fig. 7-8, it discloses the backlight heat abstractor of the flat-panel screens in the second embodiment of the invention.Compared to first embodiment, among second embodiment, circuit board 12 further selects to be directly molded on the back side of this heat-radiating substrate 3, and this circuit board 12 is reserved at least one assembly hole 121, the back side of this heat-radiating substrate 3 supplies the heat-conducting part 114 of this back light unit 11 directly to be sticked via the assembly hole 121 of this circuit board 12, effectively promotes the radiating efficiency of this backlight module 1 thus.
In addition, when the back light unit 11 among the first embodiment of the invention or second embodiment is attached at the back side of this heat-radiating substrate 3 via this assembly hole 121, these back light unit 11 heat-conducting parts 114 in conjunction with the predeterminable solder layer (not shown) of side, by surface mount technology (Surface MountTechnology, SMT) this solder layer of heating processing procedures fusion, thus with this back light unit 11 can be firm the back side that is incorporated into this heat-radiating substrate 3, promote the reliability that combines of this backlight module 1 and 3 of this heat-radiating substrates.In addition, the scolder that the material of this solder layer is preferable selects the high capacity of heat transmission of tool for use (for example: tin cream etc.), and then the heat conduction efficiency of promoting 3 of this backlight module 1 and this heat-radiating substrates.
As mentioned above, thermal energy conduction to the heat-radiating substrate 9 that the backlight heat abstractor of existing flat-panel screens must be produced back light unit 6 by circuit board 7 indirectly in Fig. 1 carries out heat exchange and moves, so that significantly reduce the shortcomings such as radiating efficiency of this back light unit 6, the present invention is by offering this assembly hole 121 at this circuit board 12 among Fig. 2, and the heat-conducting part 114 with this back light unit 11 directly amplexiforms in the back side of this heat-radiating substrate 3 via this assembly hole 121 respectively, promotes the radiating efficiency of this back light unit 11.Moreover, the bottom of the pedestal 111 of these heat-conducting part 114 relative these back light units 11 has predetermined height difference, this predetermined height difference is not less than in the thickness of this assembly hole 121, is convenient to this heat-conducting part 114 and amplexiforms closely in the back side of this heat-radiating substrate 3 via this assembly hole 121, increases the reliability of assembling.Thus, the present invention can effectively promote the radiating efficiency of backlight really, and then prolongs the service life of flat-panel screens.
Claims (15)
1. the backlight heat abstractor of a flat-panel screens, it is characterized in that: this device includes at least one back light unit, the heat-conducting part that it is provided with light-emitting component and absorbs heat energy that this light-emitting component produces;
A circuit board, it is provided with at least one assembly hole, and this circuit board and the electric connection of this back light unit, constitutes backlight module;
At least one heat-radiating substrate, wherein, this circuit board is arranged at the back side of this heat-radiating substrate, and the heat-conducting part of this back light unit directly is attached at the back side of this heat-radiating substrate by the assembly hole of this circuit board, and this heat-radiating substrate directly absorbs by this heat-conducting part and disperses the heat energy that this backlight module produces.
2. the backlight heat abstractor of flat-panel screens according to claim 1, it is characterized in that: this back light unit is provided with pedestal, in order to this light-emitting component of ccontaining location and heat-conducting part.
3. the backlight heat abstractor of flat-panel screens according to claim 1, it is characterized in that: this back light unit is provided with at least two lead pieces, this lead piece one end and this light-emitting component electrically connect, the other end and this circuit board electrically connect, and this circuit board is controlled this light-emitting component backlight is provided.
4. the backlight heat abstractor of flat-panel screens according to claim 2, it is characterized in that: an end of this heat-conducting part relatively bottom of this pedestal protrudes and is exposed to the outside, and predetermined height difference is formed on the bottom of this heat-conducting part and this pedestal, and this predetermined height difference is not less than the thickness in this circuit board assembling hole.
5. the backlight heat abstractor of flat-panel screens according to claim 1, it is characterized in that: the diameter of this assembly hole is greater than the diameter of this heat-conducting part, and this heat-conducting part just can be attached at the back side of this heat-radiating substrate by this assembly hole.
6. the backlight heat abstractor of flat-panel screens according to claim 1, it is characterized in that: this device includes support frame in addition, and it offers at least one accommodation space to shape that should backlight module, so that assemble ccontaining this backlight module.
7. the backlight heat abstractor of flat-panel screens according to claim 1, it is characterized in that: this circuit board is directly molded on the back side of this heat-radiating substrate.
8. the backlight heat abstractor of flat-panel screens according to claim 1, it is characterized in that: this heat-conducting part is provided with solder layer with the side that combines of this heat-radiating substrate.
9. the backlight heat abstractor of flat-panel screens according to claim 8, it is characterized in that: this solder layer is selected tin cream for use.
10. the backlight heat abstractor of flat-panel screens according to claim 1, it is characterized in that: the front of this heat-radiating substrate is provided with several radiating fins and several direct air from bottom to top vertically flow, disperse the heat radiation conduit of this radiating fin surface heat energy, this radiating fin and heat radiation conduit this heat-radiating substrate longitudinal extension relatively form.
11. the backlight heat abstractor of flat-panel screens according to claim 1 is characterized in that: this circuit board is selected flexible printed wiring board or rigid printed circuit board for use.
12. the backlight heat abstractor of flat-panel screens according to claim 1 is characterized in that: this light-emitting component is selected light emitting diode (LED) for use.
13. the backlight heat abstractor of flat-panel screens according to claim 6 is characterized in that: this device is provided with several radiator fans, this radiator fan is arranged at the below of this heat-radiating substrate.
14. the backlight heat abstractor of flat-panel screens according to claim 1 is characterized in that: this heat-conducting part is arranged at an end of this light-emitting component.
15. the backlight heat abstractor of flat-panel screens according to claim 1 is characterized in that: the material aluminium of this heat-conducting part, copper, gold or silver-colored a kind of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101268319A CN101140057A (en) | 2006-09-06 | 2006-09-06 | Back light source of planar display heat radiating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101268319A CN101140057A (en) | 2006-09-06 | 2006-09-06 | Back light source of planar display heat radiating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101140057A true CN101140057A (en) | 2008-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101268319A Pending CN101140057A (en) | 2006-09-06 | 2006-09-06 | Back light source of planar display heat radiating device |
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| CN (1) | CN101140057A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846299A (en) * | 2010-04-16 | 2010-09-29 | 江苏尚恩光电科技有限公司 | Heat radiator of LED lamp fitting, heat radiation method thereof and LED lamp fitting |
| CN102052626A (en) * | 2010-11-08 | 2011-05-11 | 昆山上艺电子有限公司 | LED lamp shade |
| CN102537792A (en) * | 2012-02-09 | 2012-07-04 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN101603672B (en) * | 2008-06-13 | 2012-07-18 | 上海宝康电子控制工程有限公司 | Heat dissipation type light emitting diode (LED) street lamp |
| CN101561107B (en) * | 2008-04-16 | 2012-10-10 | 鸿富锦精密工业（深圳）有限公司 | LED illuminating apparatus |
| CN101776248B (en) * | 2009-01-09 | 2014-06-25 | 台达电子工业股份有限公司 | Lamp and illumination device thereof |
| CN107577085A (en) * | 2017-10-12 | 2018-01-12 | 惠州市华星光电技术有限公司 | A kind of lamp bar, backlight module and liquid crystal display |
| CN108037614A (en) * | 2017-12-27 | 2018-05-15 | 惠州市华星光电技术有限公司 | Radiator, backlight module and the display device of backlight module |
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2006
- 2006-09-06 CN CNA2006101268319A patent/CN101140057A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101561107B (en) * | 2008-04-16 | 2012-10-10 | 鸿富锦精密工业（深圳）有限公司 | LED illuminating apparatus |
| CN101603672B (en) * | 2008-06-13 | 2012-07-18 | 上海宝康电子控制工程有限公司 | Heat dissipation type light emitting diode (LED) street lamp |
| CN101776248B (en) * | 2009-01-09 | 2014-06-25 | 台达电子工业股份有限公司 | Lamp and illumination device thereof |
| CN101846299A (en) * | 2010-04-16 | 2010-09-29 | 江苏尚恩光电科技有限公司 | Heat radiator of LED lamp fitting, heat radiation method thereof and LED lamp fitting |
| CN102052626A (en) * | 2010-11-08 | 2011-05-11 | 昆山上艺电子有限公司 | LED lamp shade |
| CN102052626B (en) * | 2010-11-08 | 2012-02-22 | 昆山上艺电子有限公司 | LED lamp shade |
| CN102537792A (en) * | 2012-02-09 | 2012-07-04 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN102537792B (en) * | 2012-02-09 | 2013-11-06 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN107577085A (en) * | 2017-10-12 | 2018-01-12 | 惠州市华星光电技术有限公司 | A kind of lamp bar, backlight module and liquid crystal display |
| WO2019071732A1 (en) * | 2017-10-12 | 2019-04-18 | 惠州市华星光电技术有限公司 | Strip light, backlight module and liquid crystal display |
| US10824007B2 (en) | 2017-10-12 | 2020-11-03 | Huizhou China Star Optoelectronics Technology Co., Ltd. | Light bar, backlight module and liquid crystal display |
| CN108037614A (en) * | 2017-12-27 | 2018-05-15 | 惠州市华星光电技术有限公司 | Radiator, backlight module and the display device of backlight module |
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