CN202253487U - LED strip radiating structure of LCD backlight module and LCD - Google Patents
LED strip radiating structure of LCD backlight module and LCD Download PDFInfo
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- CN202253487U CN202253487U CN2011203212371U CN201120321237U CN202253487U CN 202253487 U CN202253487 U CN 202253487U CN 2011203212371 U CN2011203212371 U CN 2011203212371U CN 201120321237 U CN201120321237 U CN 201120321237U CN 202253487 U CN202253487 U CN 202253487U
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- led lamp
- lamp bar
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Abstract
The utility model discloses an LED strip radiating structure of an LCD backlight module and an LCD, wherein the radiating structure includes an LED strip and a fixed strip, wherein the LED strip is arranged on the fixed strip; the LED strip includes a metal base printed circuit board and a plurality of LED chips arranged thereon; a heat conducting rubber belt is arranged between the metal base printed circuit board and the fixed strip; and radiating ribs higher than the surface of the fixed strip are arranged on the fixed strip. As the radiating ribs higher than the surface of the fixed strip are arranged on the fixed strip, the contact area of the fixed strip and the air is enlarged, the effective contact area of heat convection is further enlarged, and the heat carried away by the heat convection is increased, so as to improve the radiating efficiency, improve the service lives, the lighting efficiency and the stability of related parts of the LED, and further ensure the service life and the reliability of the LCD.
Description
Technical field
The utility model relates to the field of liquid crystal of LED-backlit, and in particular, what improvement related to is the radiator structure of LED lamp bar in a kind of LCD and the module backlight thereof.
Background technology
Nowadays; LCD TV has become the main product of tv market; In LCD TV,, there is 15%～25% electric energy to can be exchanged into luminous energy in its course of work because LED belongs to photoelectric cell with LED-backlit; All the other most electric energy nearly all convert heat energy to, make the temperature of LED element raise thus; And when the temperature of LED element rose to above its maximum allowable temperature, the LED element will be damaged because of overheated.
As shown in Figure 1, the radiator structure of LED lamp bar comprises LED lamp bar 110 and fixed strip 120 in the available liquid crystal TV module backlight; LED lamp bar 110 is arranged on the fixed strip 120; LED lamp bar 110 comprise metal base printed circuit board (Metal Core PCB, MCPCB) 111, connector 113 and a plurality of led chip 112; A plurality of led chips 112 are arranged on the metal base printed circuit board 111; Connector 113 is arranged on the end of metal base printed circuit board 111; Be connected through heat conduction adhesive tape 130 between metal base printed circuit board 111 and the fixed strip 120.
As shown in Figure 2; The heat transfer process of LED lamp bar heat radiation is in the LCD TV backlight module: the heat that is produced during led chip 112 work is transmitted to earlier on the MCPCB substrate 111 with its welding; Be transmitted to again on the heat conduction adhesive tape 130 that is connected with MCPCB substrate 111; Be transmitted to then on the fixed strip 120 that the heat conduction adhesive tape connects (being aluminium extruded among Fig. 2), be by convection in the ambient air through fixed strip 120 at last.
As shown in Figure 3; With regard to fixed strip 120 positions at heat conduction adhesive tape 130 bonding places; With cross-ventilated effective contact area be a face and b face, a face is limited by the height of fixed strip 120, the b face is limited by the thickness of fixed strip 120; And the convection action of fixed strip 120 its laps is very little; So just caused fixed strip 120 less, be unfavorable for the heat radiation of LED lamp bar 110, reduced life-span, luminous efficiency and the stability of metal base printed circuit board 111, connector 113 and a plurality of led chip 112 with the heat transfer area of air reality.
Therefore, prior art still haves much room for improvement and develops.
The utility model content
The purpose of the utility model is; The radiator structure of LED lamp bar in a kind of LCD and the module backlight thereof is provided; Can improve radiating efficiency, promote life-span, luminous efficiency and the stability of LED associated components, guarantee the service life and the reliability of LCD.
The technical scheme of the utility model is following: LED lamp bar radiator structure in a kind of LCD backlight module comprises LED lamp bar and fixed strip; LED lamp bar is arranged on the fixed strip; Said LED lamp bar comprises metal base printed circuit board and a plurality of led chips of arranging on it; Be provided with the heat conduction adhesive tape between metal base printed circuit board and the fixed strip; Wherein: fixed strip is provided with and exceeds its surperficial radiating ribs.
LED lamp bar radiator structure in the described LCD backlight module, wherein: said radiating ribs is arranged in fin structure along the length direction of fixed strip.
LED lamp bar radiator structure in the described LCD backlight module, wherein: said fixed strip is set to L type aluminium extruded; LED lamp bar is arranged on the inboard of L type aluminium extruded; Radiating ribs is arranged on the outside of L type aluminium extruded; Said LED lamp bar and radiating ribs are positioned on same one side of L type aluminium extruded.
LED lamp bar radiator structure in the described LCD backlight module, wherein: the height of said radiating ribs surpasses the thickness on L type aluminium extruded limit, place.
A kind of LCD comprises liquid crystal panel and the module backlight that is arranged on the liquid crystal panel back; Wherein: said module backlight be provided with above-mentioned in LED lamp bar radiator structure in each described LCD backlight module.
Described LCD, wherein: said liquid crystal panel is the TFT panel.
Described LCD, wherein: said LCD is a LCD TV.
The radiator structure of LED lamp bar in a kind of LCD that the utility model provided and the module backlight thereof; Owing on fixed strip, adopted to exceed its surperficial radiating ribs, increased the contact area of fixed strip and air, and then increased effective contact area of thermal convection current; The heat that makes thermal convection current take away is also just more; Improve radiating efficiency thus, also promoted life-span, luminous efficiency and the stability of LED associated components, thereby guaranteed the service life and the reliability of LCD.
Description of drawings
Fig. 1 is the stereogram of LED lamp bar radiator structure in the LCD backlight module in the prior art.
Fig. 2 is the heat transfer process sketch map of LED lamp bar heat radiation in the prior art LCD TV backlight module.
Fig. 3 is the side view of LED lamp bar radiator structure in the LCD backlight module in the prior art.
Fig. 4 is the stereogram of LED lamp bar radiator structure in the utility model LCD backlight module.
Fig. 5 is the side view of LED lamp bar radiator structure in the utility model LCD backlight module.
The specific embodiment
Below will combine accompanying drawing, the specific embodiment and the embodiment of the utility model specified, described specific embodiment in order to explain the utility model, is not the specific embodiment that is used to limit the utility model only.
The radiator structure of LED lamp bar is as shown in Figure 4 in a kind of LCD backlight module of the utility model, comprises LED lamp bar 110 and fixed strip 220; Said LED lamp bar 110 is arranged on the fixed strip 220; Said LED lamp bar 110 specifically comprises metal base printed circuit board 111, connector 113 and plurality of LEDs chip 112; Said led chip 112 is spaced on metal base printed circuit board 111 surfaces; Said connector 113 is arranged on the end of metal base printed circuit board 111; Be provided with heat conduction adhesive tape 130 between said metal base printed circuit board 111 and the fixed strip 220; On said fixed strip 220, be wholely set the radiating ribs 221 that exceeds the fixed strip surface.
According to three kinds of thermaltransmission modes of conduction, convection current and radiation, said fixed strip 220 transmits heat in air mode is main with convection current mainly, and the formula of its thermal convection current is: Q=H * A * Δ T; Wherein, Q represents heat, the heat that thermal convection current is just taken away; H is a coefficient of heat convection value, and A represents effective contact area of thermal convection current; Δ T represents the temperature difference between the surface of solids and the regional fluid; And said radiating ribs has increased the surface area of fixed strip, has increased the contact area with air, has been equivalent to increase effective contact area of thermal convection current, and the heat that makes thermal convection current take away thus is also just more, thereby has improved the radiating efficiency of fixed strip.
In the preferred implementation of LED lamp bar radiator structure, said radiating ribs 221 can be arranged in fin structure along the length direction of fixed strip 220 in the utility model LCD backlight module; For example, said radiating ribs 221 can be set to many along the length direction of secured in parallel bar 220; The formation fin structure is set between the adjacent heat sink strip 221 at interval.
Concrete, said fixed strip 220 can adopt aluminium extruded to make; Be example with L type aluminium extruded, as shown in Figure 5, LED lamp bar 110 is arranged on the inboard of L type aluminium extruded; Radiating ribs 221 is arranged on the outside of L type aluminium extruded; Said LED lamp bar 110 and radiating ribs 221 are positioned at same one side of L type aluminium extruded.For L type aluminium extruded, the effective contact area of the thermal convection current of its heat radiation is mainly a face and b face, and remaining face thermolysis is very little; The a face is by the height decision of L type aluminium extruded, and the b face is by the thickness decision of L type aluminium extruded, and the thickness that increases L type aluminium extruded is unfavorable for the control of cost, and the radiating ribs 221 that on a face, is provided with has significantly increased effective contact area of thermal convection current.
Be preferably; Be arranged on the thickness that radiating ribs 221 on a face highly surpasses L type aluminium extruded b face; Under the prerequisite that coefficient of heat convection value H in aforementioned hot convection current formula and temperature difference Δ T almost do not have to change; The effective area A of thermal convection current has increased more than 2 times; The heat Q that makes thermal convection current take away has also just increased more than 2 times, thus the relative radiator structure of LED lamp bar in the LCD backlight module in the prior art, and the radiator structure of LED lamp bar is improving on the radiating efficiency more than 2 times in the LCD backlight module of the utility model improvement back.
Based on the radiator structure of LED lamp bar in the above-mentioned LCD backlight module, the utility model has also proposed a kind of LCD, and for example LCD TV comprises liquid crystal panel and module backlight; Said module backlight is arranged on the back of liquid crystal panel; Wherein, said module backlight is provided with in the foregoing description the radiator structure of LED lamp bar in each described LCD backlight module.
Concrete, said liquid crystal panel can be TFT (Thin Film Transistor) TFT panel; Said LCD can be the TFT-LCD flat-panel monitor.
Compare with the radiator structure of LED lamp bar in LCD of the prior art and the module backlight thereof; The radiator structure of LED lamp bar in a kind of LCD that the utility model provided and the module backlight thereof; Owing on fixed strip, adopted to exceed its surperficial radiating ribs, increased the contact area of fixed strip and air, and then increased effective contact area of thermal convection current; The heat that makes thermal convection current take away is also just more; Improve radiating efficiency thus, also promoted life-span, luminous efficiency and the stability of LED associated components, thereby guaranteed the service life and the reliability of LCD.
Should be understood that; The preferred embodiment that the above is merely the utility model is not sufficient to limit the technical scheme of the utility model, concerning those of ordinary skills; Within the spirit and principle of the utility model; Can increase and decrease according to above-mentioned explanation, replacement, conversion or improvement, and all these increases and decreases, replacement, conversion or improve after technical scheme, all should belong to the protection domain of the utility model accompanying claims.
Claims (7)
1. LED lamp bar radiator structure in the LCD backlight module comprises LED lamp bar and fixed strip; LED lamp bar is arranged on the fixed strip; Said LED lamp bar comprises metal base printed circuit board and a plurality of led chips of arranging on it; Be provided with the heat conduction adhesive tape between metal base printed circuit board and the fixed strip; It is characterized in that: fixed strip is provided with and exceeds its surperficial radiating ribs.
2. LED lamp bar radiator structure in the LCD backlight module according to claim 1, it is characterized in that: said radiating ribs is arranged in fin structure along the length direction of fixed strip.
3. LED lamp bar radiator structure in the LCD backlight module according to claim 1, it is characterized in that: said fixed strip is set to L type aluminium extruded; LED lamp bar is arranged on the inboard of L type aluminium extruded; Radiating ribs is arranged on the outside of L type aluminium extruded; Said LED lamp bar and radiating ribs are positioned on same one side of L type aluminium extruded.
4. LED lamp bar radiator structure in the LCD backlight module according to claim 3 is characterized in that: the height of said radiating ribs surpasses the thickness on L type aluminium extruded limit, place.
5. a LCD comprises liquid crystal panel and the module backlight that is arranged on the liquid crystal panel back; It is characterized in that: said module backlight is provided with like LED lamp bar radiator structure in each described LCD backlight module in the claim 1 to 4.
6. LCD according to claim 5 is characterized in that: said liquid crystal panel is the TFT panel.
7. LCD according to claim 5 is characterized in that: said LCD is a LCD TV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203212371U CN202253487U (en) | 2011-08-30 | 2011-08-30 | LED strip radiating structure of LCD backlight module and LCD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203212371U CN202253487U (en) | 2011-08-30 | 2011-08-30 | LED strip radiating structure of LCD backlight module and LCD |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202253487U true CN202253487U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203212371U Expired - Fee Related CN202253487U (en) | 2011-08-30 | 2011-08-30 | LED strip radiating structure of LCD backlight module and LCD |
Country Status (1)
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| CN (1) | CN202253487U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913826A (en) * | 2012-11-13 | 2013-02-06 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN104566023A (en) * | 2014-12-24 | 2015-04-29 | 深圳市华星光电技术有限公司 | Backlight module and display |
| US9041878B2 (en) | 2012-11-13 | 2015-05-26 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Backlight module and LCD device |
| TWI720931B (en) * | 2020-08-28 | 2021-03-01 | 香港商冠捷投資有限公司 | Manufacturing method of light-emitting heat dissipation module |
-
2011
- 2011-08-30 CN CN2011203212371U patent/CN202253487U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913826A (en) * | 2012-11-13 | 2013-02-06 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| US9041878B2 (en) | 2012-11-13 | 2015-05-26 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Backlight module and LCD device |
| CN102913826B (en) * | 2012-11-13 | 2016-01-27 | 深圳市华星光电技术有限公司 | A kind of backlight module and liquid crystal indicator |
| CN104566023A (en) * | 2014-12-24 | 2015-04-29 | 深圳市华星光电技术有限公司 | Backlight module and display |
| TWI720931B (en) * | 2020-08-28 | 2021-03-01 | 香港商冠捷投資有限公司 | Manufacturing method of light-emitting heat dissipation module |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20150830 |
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| EXPY | Termination of patent right or utility model |