CN201599649U - LED side backlight device of liquid crystal display television - Google Patents
LED side backlight device of liquid crystal display television Download PDFInfo
- Publication number
- CN201599649U CN201599649U CN2009202617091U CN200920261709U CN201599649U CN 201599649 U CN201599649 U CN 201599649U CN 2009202617091 U CN2009202617091 U CN 2009202617091U CN 200920261709 U CN200920261709 U CN 200920261709U CN 201599649 U CN201599649 U CN 201599649U
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- China
- Prior art keywords
- base plate
- metal base
- led array
- led
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000004973 liquid crystal related substance Substances 0.000 title abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 36
- 239000004519 grease Substances 0.000 claims abstract description 14
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 14
- 239000004411 aluminium Substances 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 230000017525 heat dissipation Effects 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
Images
Abstract
The utility model discloses an LED side backlight device of a liquid crystal display television. The device comprises an outer frame and a metal base plate for fixing a light guide plate on the outer frame, the upper edge of the metal base plate is provided with an upper LED array strip while the lower edge of the metal base plate is provided with a lower LED array strip, the upper LED array strip and the lower LED array strip respectively correspond to an upper lateral surface and a lower lateral surface of the light guide plate, heat conduction silicone grease for radiating is filled between the lower LED array strip and the metal base plate, and the heat conduction silicone grease is also disposed between the lower LED array strip and the metal base plate, thereby increasing contact areas between the metal base plate and the heat conduction silicone grease, and between the heat conduction silicone grease and the lower LED array strip, reducing thermal contact resistance, improving conduction and heat dissipation of a side backlight, lowering LED junction temperature, alleviating LED light declination and prolonging service life of the liquid crystal display television.
Description
Technical field
The utility model relates to the LED-backlit source apparatus field of LCD TV, and in particular, what improvement related to is a kind of LED side backlight arrangement of LCD TV.
Background technology
At present, adopt LED (Light Emitting Diode, light emitting diode) as the sidelight LCD TV module of backlight, because a large amount of intensive use LED of side backlight, the big power consumption height of caloric value, generally will account for the overwhelming majority of sidelight LCD TV module total power consumption, make the whole sidelight LCD TV module life-span shorten, security performance is low; Therefore, side backlight heat dissipation problem just becomes one of sidelight LCD TV module problem demanding prompt solution; What existing radiating mode adopted is the settling mode that aluminium base adds the heat conduction film, promptly all presss from both sides between led array bar backlight as side and aluminium base and establishes the heat conduction adhesive tape, by screw is fastening it is fitted tightly to reduce loose contact.
But, the temperature of sidelight LCD TV module when work is still quite high, although existing radiating mode can play the effect of certain heat radiation, but the thermal resistance of heat conduction film itself is just big, in case with the aluminium base loose contact, it is untimely to cause heat on the led array bar to distribute, and causes a large amount of accumulation of heat, thereby make the LED junction temperature constantly raise, accelerated the LED light decay; May initiation fire when serious etc. accident, also limited the application of LED side backlight on LCD TV thus.
Therefore, prior art still haves much room for improvement and develops.
The utility model content
The purpose of this utility model is, is to provide a kind of LED side backlight arrangement of LCD TV, can improve the heat loss through conduction of side backlight, reduces the LED junction temperature, slows down the LED light decay, prolongs the service life of LCD TV.
The technical solution of the utility model is as follows:
A kind of LED side backlight arrangement of LCD TV, comprise that a housing and is used for LGP is fixed on metal base plate on the described housing, led array bar on one is set in the top of described metal base plate, bottom at described metal base plate is provided with led array bar, respectively the upper and lower two sides of corresponding described LGP; Wherein, the heat-conducting silicone grease that is provided for dispelling the heat between described led array bar down and the described metal base plate.
Described LED side backlight arrangement, wherein, the described heat-conducting silicone grease that is provided for dispelling the heat between led array bar and the described metal base plate of going up.
Described LED side backlight arrangement, wherein, the light emitting diode quantity of described led array bar down is more than the described light emitting diode quantity that goes up the led array bar.
Described LED side backlight arrangement, wherein, the site diameter of described LGP mid portion is greater than the upper and lower two-part site of described LGP diameter; The dot density of described LGP the first half is greater than the dot density of described LGP the latter half.
Described LED side backlight arrangement, wherein, described metal base plate is an aluminium sheet.
The LED side backlight arrangement of a kind of LCD TV provided by the utility model, owing between following led array bar and metal base plate, be provided with heat-conducting silicone grease, increased between metal base plate and the heat-conducting silicone grease and heat-conducting silicone grease and following led array bar between contact area, reduced thermal contact resistance, improved the heat loss through conduction of side backlight, thereby, the LED junction temperature reduced, slow down the LED light decay, prolonged the service life of LCD TV.
Description of drawings
Fig. 1 is the whole cutaway view of the utility model LED side backlight arrangement;
Fig. 2 is local A among the utility model Fig. 1 (going up a led array bar part) enlarged drawing;
Fig. 3 is local B among the utility model Fig. 1 (following led array bar part) enlarged drawing;
Fig. 4 is a LED distribution schematic diagram up and down in the utility model LED side backlight arrangement;
Fig. 5 is the network point distribution schematic diagram on the LGP in the utility model LED side backlight arrangement.
The specific embodiment
Below with reference to accompanying drawing, the specific embodiment of the present utility model is described in detail.
The LED side backlight arrangement of a kind of LCD TV of the present utility model, one of its specific embodiment, as shown in Figure 1, comprise that a housing 210 and is used for LGP 220 is fixed on metal base plate 230 on the described housing 210, shown in accompanying drawing 2 and 3, the medial surface of the described metal base plate 230 described LGP 220 of fitting etches the one side of site, the another side of described LGP 220 is to the medial surface of described housing 210, fit successively diffusion barrier and brightness enhancement film 270, glass 290 are provided with pad 281 and 282 respectively in the two sides of glass 290; Led array bar 240 on one is set in the top of described metal base plate 230, led array bar 340 once is set, respectively the upper and lower two sides of corresponding described LGP 220 in the bottom of described metal base plate 230; As shown in Figure 2, describedly go up a plurality of light emitting diodes 241 of going up that led array bar 240 comprises metal substrate 242 and array arrangement on, be fastened on the described metal base plate 230 by screw 250; As shown in Figure 3, described down led array bar 340 comprises a plurality of light emitting diodes 341 down of metal substrate 342 and array arrangement, also is fastened on the described metal base plate 230 by screw 250; Wherein, the heat-conducting silicone grease 360 that is provided for dispelling the heat between described led array bar 340 down and the described metal base plate 230; Described going up between led array bar 240 and the described metal base plate 230 still adopts heat conduction film 260 to dispel the heat.
In the existing side back lighting device, what adopt between described led array bar 340 down and the described metal base plate 230 is 260 heat radiations of heat conduction film, but owing to have thermal contact resistance between the contact-making surface, and bigger etc. the factor of heat conduction film 260 self thermal resistance, the heat of following led array bar 340 is difficult to be transmitted to metal base plate 230 and dissipates, the heat that gathers rises and causes the LED junction temperature to raise, and has accelerated the LED light decay, has shortened the service life of LCD TV.
Compare with side back lighting device of the prior art, in the side back lighting device of the present utility model, utilize the flowability of heat-conducting silicone grease 360 to increase contact area greatly, thereby significantly reduced thermal contact resistance, add the good thermal conduction characteristic of heat-conducting silicone grease 360 self, make that the heat overwhelming majority of led array bar 340 all is transmitted to metal base plate 230 down to dissipate, reduced the heat that gathers, reduce the LED junction temperature, prolonged the service life of LCD TV greatly.
As preferred embodiment of the present utility model, as shown in Figure 4, light emitting diode 341 quantity of described led array bar 340 down are more than described light emitting diode 241 quantity that go up led array bar 240.Thereby can reduce the rising that causes sidelight liquid crystal module temperature because of the heat accumulation rising of following led array bar 340; And the heat of going up led array bar 240 can directly dissipate by the louvre on the housing 210.
Match therewith, as shown in Figure 5, the site diameter of described LGP 220 mid portions 522 is greater than the site diameter of the upper and lower two parts 521 of described LGP and 523; The dot density of described LGP 220 the first half 525 is greater than the dot density of described LGP 220 the latter halfs 524.Can make the more all even unanimity of side backlight Luminance Distribution on the whole thus.
Be preferably, described metal base plate 230 is an aluminium sheet, compares with ferrous metal, and the heat conductivility of non-ferrous metal is better, is more conducive to the heat radiation of side backlight.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all belong to the protection domain of the utility model claims.
Claims (5)
1. the LED side backlight arrangement of a LCD TV, comprise that a housing and is used for LGP is fixed on metal base plate on the described housing, led array bar on one is set in the top of described metal base plate, bottom at described metal base plate is provided with led array bar, respectively the upper and lower two sides of corresponding described LGP; It is characterized in that the heat-conducting silicone grease that is provided for dispelling the heat between described led array bar down and the described metal base plate.
2. LED side backlight arrangement according to claim 1 is characterized in that, the described heat-conducting silicone grease that is provided for dispelling the heat between led array bar and the described metal base plate of going up.
3. LED side backlight arrangement according to claim 1 is characterized in that, the light emitting diode quantity of described led array bar down is more than the described light emitting diode quantity that goes up the led array bar.
4. LED side backlight arrangement according to claim 3 is characterized in that, the site diameter of described LGP mid portion is greater than the upper and lower two-part site of described LGP diameter; The dot density of described LGP the first half is greater than the dot density of described LGP the latter half.
5. according to arbitrary described LED side backlight arrangement in the claim 1 to 4, it is characterized in that described metal base plate is an aluminium sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202617091U CN201599649U (en) | 2009-12-16 | 2009-12-16 | LED side backlight device of liquid crystal display television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202617091U CN201599649U (en) | 2009-12-16 | 2009-12-16 | LED side backlight device of liquid crystal display television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201599649U true CN201599649U (en) | 2010-10-06 |
Family
ID=42810704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202617091U Expired - Fee Related CN201599649U (en) | 2009-12-16 | 2009-12-16 | LED side backlight device of liquid crystal display television |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201599649U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135269A (en) * | 2010-12-22 | 2011-07-27 | 友达光电股份有限公司 | Heat dissipation sheet metal part and application thereof |
| CN102537760A (en) * | 2010-12-22 | 2012-07-04 | 联胜（中国）科技有限公司 | Backlight module and display device using same |
| CN102705724A (en) * | 2011-03-28 | 2012-10-03 | 台湾积体电路制造股份有限公司 | Light cavity that improves light output uniformity |
| CN108267889A (en) * | 2016-12-30 | 2018-07-10 | 乐金显示有限公司 | Liquid crystal display |
-
2009
- 2009-12-16 CN CN2009202617091U patent/CN201599649U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135269A (en) * | 2010-12-22 | 2011-07-27 | 友达光电股份有限公司 | Heat dissipation sheet metal part and application thereof |
| CN102537760A (en) * | 2010-12-22 | 2012-07-04 | 联胜（中国）科技有限公司 | Backlight module and display device using same |
| CN102135269B (en) * | 2010-12-22 | 2012-11-28 | 友达光电股份有限公司 | Heat dissipation sheet metal part and application thereof |
| CN102705724A (en) * | 2011-03-28 | 2012-10-03 | 台湾积体电路制造股份有限公司 | Light cavity that improves light output uniformity |
| CN108267889A (en) * | 2016-12-30 | 2018-07-10 | 乐金显示有限公司 | Liquid crystal display |
| CN108267889B (en) * | 2016-12-30 | 2020-12-11 | 乐金显示有限公司 | Liquid crystal display device with a light guide plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101006 Termination date: 20121216 |