CN100399156C - Liquid crystal display possessing heat radiating device and backlight module thereof - Google Patents
Liquid crystal display possessing heat radiating device and backlight module thereof Download PDFInfo
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- CN100399156C CN100399156C CNB2004100053541A CN200410005354A CN100399156C CN 100399156 C CN100399156 C CN 100399156C CN B2004100053541 A CNB2004100053541 A CN B2004100053541A CN 200410005354 A CN200410005354 A CN 200410005354A CN 100399156 C CN100399156 C CN 100399156C
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- backlight module
- louvre
- actuating device
- heat abstractor
- temperature
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Abstract
The present invention relates to a liquid crystal display with a heat dissipation device and a backlight module thereof. The backlight module comprises a heat dissipation hole and a heat actuated device, wherein the heat actuated device is arranged in the heat dissipation hole; when the temperature in the backlight module is higher than a set temperature, the heat dissipation hole is opened by the heat actuated device; when the temperature in the backlight module is lower than the set temperature, the heat dissipation hole is closed by the heat actuated device.
Description
Technical field
The present invention relates to a kind of LCD and backlight module thereof with heat abstractor, particularly relate to a kind of direct type backlight module, it makes module keep best briliancy under the varying environment temperature.
Background technology
In the liquid crystal display of general LCD, use backlight module as light source, and backlight module is according to the difference of structure, usually can be divided into ora terminalis formula and straight-down negative two big classes, because The present invention be directed to direct type backlight module improves, the formation of direct type backlight module below only is described, and omits the explanation of ora terminalis formula backlight module.
As shown in Figure 1, direct type backlight module 10 comprises a reflecting plate 11, a light diffusing sheet 12, a plurality of fluorescent tube 13, fluorescent tube support platform 14 and two light-collecting pieces 15; Wherein reflecting plate 11 is positioned at the bottom of backlight module 10, reflect backlight module 10 in order to light, and it is box, and has a base plate 111 and biside plate 112 fluorescent tube 13, side plate 112 lays respectively at the two ends of base plate 111, and vertically extends from base plate 111; Light diffusing sheet 12 is arranged on the reflecting plate 11 in the mode that covers fluorescent tube 13, backlight to form, fluorescent tube 13 is as the light source of backlight module 10, be arranged on and support on the platform 14, and and 111 of the base plates of reflecting plate 11 have one at interval, light-collecting piece 15 is positioned on the exiting surface of light diffusing sheet 12, to produce the effect that improves briliancy.
Because the required briliancy of backlight module improves constantly, the quantity and the supply capability of fluorescent tube also improve constantly in it, yet, this will make the temperature in the backlight module also improve thereupon, even thereby caused increasing the quantity and the supply capability of fluorescent tube, but can't increase the situation of briliancy, detailed says, because the temperature in the backlight module is too high, makes its briliancy can reduce along with the rising of temperature on the contrary.
In order to improve above-mentioned situation, open in 2001-297623 number the Jap.P. spy, a kind of back lighting device 20,20a are proposed, shown in Fig. 2 a, 2b, it can form a plurality of louvres 22,23, mode with convection current prevents that the environment temperature of fluorescent tube from rising, and can prevent because the temperature in the backlight module is too high, and makes its briliancy reduce.
Yet, because louvre always is in the state of unlatching, this will make fluorescent tube before arriving best working temperature, the heat that is soon produced sheds, cause fluorescent tube can't reach best working temperature, thereby the briliancy optimization that backlight module is produced, and dust also from then on louvre enter in the backlight module.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of backlight module with heat abstractor, it can improve briliancy effectively.
Another object of the present invention is to provide a kind of LCD with heat abstractor, it can make the backlight module in it operate under the working temperature of the best.
According to the present invention, a kind of backlight module with heat abstractor is provided, it comprises a reflecting plate and a hot actuating device, reflecting plate has a plurality of louvres, hot actuating device is arranged in the louvre, wherein is higher than one both during fixed temperature when the temperature in the above-mentioned backlight module, and hot actuating device is opened louvre, and being lower than one both during fixed temperature when the temperature in the above-mentioned backlight module, hot actuating device is closed louvre.Described hot actuating device has and forms one first two-layer material and one second material, and first material is different with the second material coefficient of thermal expansion coefficient.
In a preferred embodiment, first material and second material are selected from any in titanium, aluminium, iron, copper or the rubber respectively.
In another preferred embodiment, backlight module is a box, and it has a base plate and biside plate, and louvre is formed on base plate or the side plate.
In addition, backlight module also comprises a light diffusing sheet and a light collecting plate, and light diffusing sheet is arranged at the opposite side of reflecting plate with respect to fluorescent tube, and with a reflecting plate both set a distance at interval, and light collecting plate is arranged between the side plate of reflecting plate, and light diffusing sheet is between the base plate of light collecting plate and reflecting plate.
In another preferred embodiment, backlight module comprises that also one supports a platform and a fluorescent tube, supports that platform is arranged on the reflecting plate, and fluorescent tube is arranged in the mode that does not contact with reflecting plate and supports that fluorescent tube can be a fluorescent tube on the platform.
In addition in the present invention, a kind of LCD with heat abstractor is provided, it comprises a framework, a backlight module and a hot actuating device, its middle frame has a louvre, and backlight module is arranged in the framework, and hot actuating device is arranged in the louvre, when the temperature of backlight module is higher than one both during fixed temperature, hot actuating device is opened louvre, and is lower than one both during fixed temperature when the temperature of backlight module, and hot actuating device is closed louvre.Described hot actuating device has and forms one first two-layer material and one second material, and first material is different with the second material coefficient of thermal expansion coefficient.Because of the temperature in the backlight module than environment temperature height, when louvre is opened, gas flow direction be high temperature to low temperature (by flowing to outside the module in the module), so can reduce dust and enter backlight module inside, also the effective temperature in the adjustment module.
Again in the present invention, a kind of LCD with heat abstractor is provided, it comprises a framework, a backlight module and a hot actuating device, wherein backlight module is arranged in the framework, and has a louvre, and hot actuating device is arranged in the louvre, when the temperature of backlight module is higher than one both during fixed temperature, hot actuating device is opened louvre, and when the temperature of backlight module low both fixed temperature, hot actuating device is closed louvre.Described hot actuating device has and forms one first two-layer material and one second material, and first material is different with the second material coefficient of thermal expansion coefficient.
Description of drawings
In order to make above and other objects of the present invention, feature and the advantage can more obvious easy to understand, below especially exemplified by a preferred embodiment, and conjunction with figs. elaborates.In the accompanying drawing:
Fig. 1 is the synoptic diagram of known direct type backlight module;
Fig. 2 a, 2b open the synoptic diagram of the backlight module in 2001-297623 number for the Jap.P. spy;
Fig. 3 is the synoptic diagram with backlight module of heat abstractor of the present invention;
Fig. 4 a is the framework among Fig. 3 and the partial enlarged drawing of hot actuating device, and wherein hot actuating device is positioned at off-position;
Fig. 4 b is the framework among Fig. 3 and the partial enlarged drawing of hot actuating device, and wherein hot actuating device is positioned at the open site; And
Fig. 5 is the synoptic diagram with LCD of heat abstractor of the present invention.
Embodiment
Fig. 3 shows the backlight module 30 with heat abstractor of the present invention, it comprises a reflecting plate 31, a plurality of hot actuating devices 32, one light diffusing sheet 33, two light collecting plates 34, one supports platform 35, and a plurality of fluorescent tubes 36, wherein reflecting plate 31 is positioned at the below of backlight module 30, and be box, be that reflecting plate 31 has a base plate 312 and biside plate 313, on base plate 312 and side plate 313, be formed with a plurality of louvres 311 respectively, will be appreciated that, in Fig. 3, on base plate 312 and side plate 313, all be formed with louvre 311, but be not limited to this, also can on base plate 312 or side plate 313, form according to circumstances and only.
Each hot actuating device 32 is arranged at respectively in the louvre 311 of reflecting plate 31, in the present embodiment, hot actuating device 32 is formed by two-layer material with different heat expansion coefficient, with reference to Fig. 4 a, 4b, each hot actuating device 32 has one first material 321 and one second material 322, and the thermal expansivity of first material 321 is greater than the thermal expansivity of second material 322, rise above one both during fixed temperature because of fluorescent tube 36 heating when the temperature in the backlight module 30 thus, hot actuating device 32 is heated and to the direction bending of second material 322 (thermal expansivity is lower), and then louvre 311 opened, shown in Fig. 4 b, drop to when both being lower than fixed temperature and open because of louvre 311 when the temperature in the backlight module 30, hot actuating device 32 restores to the original state and louvre 311 is closed, shown in Fig. 4 a.
It should be noted that above-mentioned both fixed temperatures can be the optimum working temperature of fluorescent tube 36, can make fluorescent tube 36 (40-50 degree) operation under the working temperature of the best thus, the briliancy optimization that backlight module 30 is produced.
In addition, first material 321 and second material 322 can be selected from any in titanium, aluminium, iron, copper, SUS 304 (stainless steel), SS41 (stainless steel) or the rubber respectively.
In addition, light diffusing sheet 33 is arranged between the side plate 313 of reflecting plate 31, and and the base plate 312 of reflecting plate 31 between a both set a distance at interval, light collecting plate 34 is arranged between the side plate 313 of reflecting plate 31, and makes light diffusing sheet 33 between the base plate 312 of light collecting plate 34 and reflecting plate 31; Support platform 35 to be arranged on the reflecting plate 31, in order to a lamp carrier 36, each fluorescent tube 36 is arranged on the support platform 35 in the mode that contact with reflecting plate 31 respectively, so that as the light source of backlight module 30, fluorescent tube 36 can be a fluorescent tube.
As mentioned above, install hot actuating device additional by louvre place at reflecting plate, when the arrival of the temperature in the backlight module one both fixed temperature, just starting hot actuating device opens louvre and dispels the heat, and the temperature in backlight module drops under a certain temperature, hot actuating device is just closed louvre to keep the temperature in the backlight module, just can effectively utilize the heat that fluorescent tube produces thus and impel fluorescent tube comparatively fast to reach working temperature, and can after this unnecessary heat be dissipated.
In addition, because the temperature in the backlight module is than environment temperature height, when louvre was opened, gas flow direction was to low temperature (by flowing to outside the module in the module) by high temperature, so can reduce dust and enter backlight module inside, also the temperature in the adjustment module effectively.
Will be appreciated that in the above description, hot actuating device is arranged on the reflecting plate, but be not limited to this that it can be installed in any position of backlight module except panel; In addition, hot actuating device also is not limited to be set on the backlight module, as shown in Figure 5, Fig. 5 shows that one has the part synoptic diagram of the LCD 100 of heat abstractor, LCD 100 comprises a framework 110 and a backlight module 120, is formed with a plurality of louvres 111 on the framework 110, and can be provided with hot actuating device 32 in each louvre 111, to reach above-mentioned effect, backlight module 120 can be operated under the working temperature of the best.
Though the present invention discloses with preferred embodiment; but it is not that any those skilled in the art is not breaking away from the spirit and scope of the invention in order to qualification the present invention; can make many changes and retouching, so protection scope of the present invention is defined with accompanying Claim.
Claims (16)
1. backlight module with heat abstractor comprises:
One reflecting plate has a louvre; And
One hot actuating device, be arranged in the described louvre, wherein be higher than one both during fixed temperature when the temperature in the described backlight module, described hot actuating device is opened louvre, and when the temperature in the described backlight module both is lower than fixed temperature, hot actuating device is closed louvre, and described hot actuating device has and forms one first two-layer material and one second material, and first material is different with the second material coefficient of thermal expansion coefficient.
2. the backlight module with heat abstractor as claimed in claim 1, wherein said first material is selected from any in titanium, aluminium, iron, copper or the rubber.
3. the backlight module with heat abstractor as claimed in claim 1, wherein said second material is selected from any in titanium, aluminium, iron, copper or the rubber.
4. the backlight module with heat abstractor as claimed in claim 1, wherein said reflecting plate is a box, has a base plate and biside plate.
5. the backlight module with heat abstractor as claimed in claim 4, wherein said louvre is formed on the base plate.
6. the backlight module with heat abstractor as claimed in claim 4, wherein said louvre is formed on the side plate.
7. the backlight module with heat abstractor as claimed in claim 4 wherein also comprises: a light diffusing sheet, be arranged between the side plate of reflecting plate, and and the base plate of reflecting plate between a both set a distance at interval.
8. the backlight module with heat abstractor as claimed in claim 7 wherein also comprises: a light collecting plate, be arranged between the side plate of this reflecting plate, and wherein light diffusing sheet is between the base plate of light collecting plate and reflecting plate.
9. the backlight module with heat abstractor as claimed in claim 1 wherein also comprises: one supports platform, is arranged on the reflecting plate; And a fluorescent tube, be arranged in the mode that does not contact and support on the platform with reflecting plate.
10. the backlight module with heat abstractor as claimed in claim 9, wherein said fluorescent tube are a fluorescent tube.
11. the LCD with heat abstractor comprises:
One framework has a louvre;
One backlight module is arranged in the described framework; And
One hot actuating device, be arranged in the described louvre, wherein be higher than one both during fixed temperature when the temperature of described backlight module, described hot actuating device is opened louvre, and when the temperature of described backlight module both is lower than fixed temperature, hot actuating device is closed louvre, and described hot actuating device has and forms one first two-layer material and one second material, and first material is different with the second material coefficient of thermal expansion coefficient.
12. the LCD with heat abstractor as claimed in claim 11, wherein said first material is selected from any in titanium, aluminium, iron, copper or the rubber.
13. the LCD with heat abstractor as claimed in claim 11, wherein said second material is selected from any in titanium, aluminium, iron, copper or the rubber.
14. the LCD with heat abstractor comprises:
One framework;
One backlight module is arranged in the described framework, and has a louvre; And
One hot actuating device, be arranged in the described louvre, wherein be higher than one both during fixed temperature when the temperature in the described backlight module, described hot actuating device is opened louvre, and when the temperature in the described backlight module both is lower than fixed temperature, hot actuating device is closed louvre, and described hot actuating device has and forms one first two-layer material and one second material, and first material is different with the second material coefficient of thermal expansion coefficient.
15. the LCD with heat abstractor as claimed in claim 14, wherein said first material is selected from any in titanium, aluminium, iron, copper or the rubber.
16. the LCD with heat abstractor as claimed in claim 14, wherein said second material is selected from any in titanium, aluminium, iron, copper or the rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100053541A CN100399156C (en) | 2004-02-11 | 2004-02-11 | Liquid crystal display possessing heat radiating device and backlight module thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100053541A CN100399156C (en) | 2004-02-11 | 2004-02-11 | Liquid crystal display possessing heat radiating device and backlight module thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1558281A CN1558281A (en) | 2004-12-29 |
| CN100399156C true CN100399156C (en) | 2008-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100053541A Expired - Fee Related CN100399156C (en) | 2004-02-11 | 2004-02-11 | Liquid crystal display possessing heat radiating device and backlight module thereof |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357805C (en) * | 2005-01-31 | 2007-12-26 | 广辉电子股份有限公司 | Direct down backlight module |
| CN101498409B (en) * | 2007-09-29 | 2012-04-04 | 京东方科技集团股份有限公司 | Backlight device |
| CN109027821A (en) * | 2018-08-23 | 2018-12-18 | 重庆秉为科技有限公司 | A kind of lamp housing of LED light |
| CN110252977B (en) * | 2019-07-16 | 2021-03-23 | 华北理工大学 | Circulating cooling system for continuous casting process |
| CN111179772A (en) * | 2020-01-16 | 2020-05-19 | 抚州市祥邦科技传媒有限公司 | Energy-saving LED display screen with curved air deflector and use method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6089739A (en) * | 1997-09-30 | 2000-07-18 | Sony Corporation | Surface light source device |
| JP2002006759A (en) * | 2000-06-20 | 2002-01-11 | Casio Comput Co Ltd | Surface light source device |
| JP2002279819A (en) * | 2001-03-19 | 2002-09-27 | Matsushita Electric Ind Co Ltd | Lighting unit, and liquid crystal display device using the same |
| JP2003045220A (en) * | 2001-07-30 | 2003-02-14 | Kitagawa Ind Co Ltd | Back light support unit |
| CN2546911Y (en) * | 2002-04-10 | 2003-04-23 | 廖骏吉 | Negative phototropic cover radiating structure |
-
2004
- 2004-02-11 CN CNB2004100053541A patent/CN100399156C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6089739A (en) * | 1997-09-30 | 2000-07-18 | Sony Corporation | Surface light source device |
| JP2002006759A (en) * | 2000-06-20 | 2002-01-11 | Casio Comput Co Ltd | Surface light source device |
| JP2002279819A (en) * | 2001-03-19 | 2002-09-27 | Matsushita Electric Ind Co Ltd | Lighting unit, and liquid crystal display device using the same |
| JP2003045220A (en) * | 2001-07-30 | 2003-02-14 | Kitagawa Ind Co Ltd | Back light support unit |
| CN2546911Y (en) * | 2002-04-10 | 2003-04-23 | 廖骏吉 | Negative phototropic cover radiating structure |
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| CN1558281A (en) | 2004-12-29 |
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