CN101307894B - Side light type luminous diode backlight - Google Patents
Side light type luminous diode backlight Download PDFInfo
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- CN101307894B CN101307894B CN2008101136766A CN200810113676A CN101307894B CN 101307894 B CN101307894 B CN 101307894B CN 2008101136766 A CN2008101136766 A CN 2008101136766A CN 200810113676 A CN200810113676 A CN 200810113676A CN 101307894 B CN101307894 B CN 101307894B
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Abstract
The invention relates to an side light type LED backlight, which comprises a LED lamp set, a light guide plate, an optical film group, wherein the light leaving surface of the LED lamp set, the incident plane of the optical film group are in a closed space; the space, in which the LED lamp set except the light leaving surface is arranged, is communicated with the exterior space of the side light type LED backlight. In the proposal, the closed space of the side light type LED backlight can avoid light-leakage, and because the space, in which the LED lamp set except the light leaving surface is arranged, is communicated with the exterior space of the side light type LED backlight, energy emitted by a Led lamp set base can be quickly transmitted to the exterior space, thereby improving heat dissipation performance of the side light type LED backlight and avoiding light- leakage furthest.
Description
Technical field
The present invention relates to a kind of side-light type back light, relate in particular to a kind of side-lighting type light-emitting diode backlight source heat dissipation improved structure.
Background technology
At present, backlight is because the light source position difference is divided into direct-light-type backlight and side-light type back light usually.Direct-light-type backlight does not have light guide plate, directly light source is placed under the blooming group; Side-light type back light is provided with light guide plate, and light source is placed on the light guide plate side, and pointolite or line source are converted to area source.
In recent years, side-light type back light receives much concern because of it is frivolous, and, with the LED light lamp group be that the side-light type back light of light source is that side-lighting type light-emitting diode backlight source relies on that color reducibility is good, color management convenient, brightness uniformity is good, the life-span is long, advantage such as safety, environmental protection, anti-seismic performance are good, be widely used in the small-medium size panel display spare, just progressively expanded to large size panel displays such as notebook computer, desktop computer, televisors.
In the prior art, the structural representation of side-lighting type light-emitting diode backlight source comprises LED light lamp group 11, circuit board 12, backboard 13, reflecting plate 14, light guide plate 15 and blooming group 16 as shown in Figure 1a; LED light lamp group 11 is selected the luminous light emitting diode in top and two kinds of light emitting diodes of the luminous light emitting diode of side for use, as Fig. 1 b, Fig. 1 c; LED light lamp group 11 is welded on circuit board 12 1 sides, and circuit board 12 opposite sides closely are mounted on backboard 13 inside surfaces; A reflecting plate 14 is placed in backboard 13 bottoms, and reflecting plate 14 tops are close to light guide plate 15, blooming group 16 successively, relies on framework 17 that above-mentioned each parts are fixed together.
During side-lighting type light-emitting diode backlight source work, after the light that LED light lamp group 11 is sent is injected light guide plate 15, penetrate light guide plate 15 upper surfaces, see through blooming group 16 and form uniform surface light source via the reflection back takes place between light guide plate 15 and the reflecting plate 14 repeatedly.
The defective that prior art exists is, LED light lamp group in the side-lighting type light-emitting diode backlight source is in the environment of a complete closed, therefore, the heat heat dissipation path that is produced after the LED light lamp group is lighted mainly is to backboard via circuit board heat conduction, and then be dissipated in the air, along with brightness of LED light lamp group and size backlight increase, LED light lamp group power can progressively increase, and heat dissipation problem is more outstanding.
Summary of the invention
The objective of the invention is to propose a kind of side-lighting type light-emitting diode backlight source, to improve the heat dispersion of backlight.
For achieving the above object, the invention provides a kind of side-lighting type light-emitting diode backlight source, comprise LED light lamp group, light guide plate and blooming group, also comprise reflecting plate, described reflecting plate is L shaped, and the top of described reflecting plate and described blooming group are joined; And the light entrance face by the reflecting surface of described reflecting plate, the exiting surface of described LED light lamp group, described light guide plate constitutes an enclosure space with a part that is used to form the described blooming group of enclosure space; The space at the remainder place of described LED light lamp group except that exiting surface is communicated with the space outerpace of described side-lighting type light-emitting diode backlight source.
The space at the remainder place of described LED light lamp group except that exiting surface is communicated with and can be specially with the space outerpace of described side-lighting type light-emitting diode backlight source: the backboard bottom of described LED light lamp group below is provided with the hole that is communicated with described space outerpace; Maybe can be specially: the overlapping part of the framework of described side-lighting type light-emitting diode backlight source and described backboard is provided with the hole that is communicated with described space outerpace; Maybe can be specially: the back plate edges of described side-lighting type light-emitting diode backlight source is n shape, described LED light lamp group is the luminous LED light lamp group in top, be positioned on the circuit board for described LED light lamp group power supply, described circuit board is fixed on the side surface of the wall portion of described back plate edges; Maybe can be specially: the back plate edges of described side-lighting type light-emitting diode backlight source is η shape, described LED light lamp group is the luminous LED light lamp group of side, is fixed on the lower surface at the top of described back plate edges for the circuit board of described LED light lamp group power supply; Maybe can be specially: the back plate edges of described side-lighting type light-emitting diode backlight source is I-shaped right half of, described LED light lamp group is two side-lighting type light-emitting diodes, two circuit boards for described two side-lighting type light-emitting diodes power supply lay respectively at the top lower surface of described back plate edges, the upper surface of bottom.
The invention provides a kind of side-lighting type light-emitting diode backlight source, comprise LED light lamp group, light guide plate and blooming group, also comprise lampshade; Described lampshade is a square shape; The right wall of described lampshade has the hole, and described LED light lamp group is by the hole bright dipping on the right wall of described lampshade; And the light entrance face by the right wall outer surface of described lampshade, the exiting surface of described LED light lamp group, described light guide plate constitutes an enclosure space with a part that is used to form the described blooming group of enclosure space; Described LED light lamp group is two groups of side-lighting type light-emitting diodes, and two circuit boards for described two groups of side-lighting type light-emitting diodes power supply lay respectively at the top lower surface of described lampshade, the upper surface of bottom; The backboard of the left wall of described lampshade, described side-lighting type light-emitting diode backlight source, the overlapping part of framework are provided with the hole that is communicated with described space outerpace.
In the such scheme, the side-lighting type light-emitting diode backlight source enclosure space has prevented the light leakage, be communicated with the space outerpace of described side-lighting type light-emitting diode backlight source by space again the remainder place of described LED light lamp group, the heat that makes LED light lamp group matrix send can propagate into space outerpace fast, improve the side-lighting type light-emitting diode backlight source heat dispersion, avoided the generation of light leakage phenomena again to greatest extent.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 a is existing side-lighting type light-emitting diode backlight source synoptic diagram;
Fig. 1 b is the illuminated side-lighting type light-emitting diode backlight source diagrammatic cross-section in top for existing LED light lamp group;
Fig. 1 c is the illuminated side-lighting type light-emitting diode backlight source diagrammatic cross-section of side for existing LED light lamp group;
Fig. 2 is the diagrammatic cross-section of side-lighting type light-emitting diode backlight source embodiment one of the present invention;
Fig. 3 is the diagrammatic cross-section of side-lighting type light-emitting diode backlight source embodiment two of the present invention;
Fig. 4 is the diagrammatic cross-section of side-lighting type light-emitting diode backlight source embodiment three of the present invention;
Fig. 5 is the diagrammatic cross-section of side-lighting type light-emitting diode backlight source embodiment four of the present invention;
Fig. 6 is the diagrammatic cross-section of side-lighting type light-emitting diode backlight source embodiment five of the present invention;
Fig. 7 is the diagrammatic cross-section of side-lighting type light-emitting diode backlight source embodiment six of the present invention.
Embodiment
The side-lighting type light-emitting diode backlight source of the embodiment of the invention is mainly by being provided with an enclosure space, guarantee that the light that the LED light lamp group is sent does not leak outside, and, the space at the part place of LED light lamp group except that light-emitting area is communicated with the space outerpace of backlight, thereby guarantee that the heat that the LED light lamp group is sent can propagate into the outside fast, to improve the heat dispersion of side-lighting type light-emitting diode backlight source.The space at enclosure space and the LED light lamp group part place except that light-emitting area is communicated with the space outerpace of backlight, and is different and change to some extent according to the structure of side-lighting type light-emitting diode backlight source, is specifically described respectively below.
Figure 2 shows that the diagrammatic cross-section of side-lighting type light-emitting diode backlight source embodiment one of the present invention, as shown in Figure 2, side-lighting type light-emitting diode backlight source comprises LED light lamp group 21, circuit board 22, backboard 23, reflecting plate 24, light guide plate 25, blooming group 26 and framework 27; LED light lamp group 21 is made up of LED light lamp, and light emitting diode is illuminated for the top, and LED light lamp group 21 directly is welded on the circuit board 22, and circuit board 22 is mounted on backboard 23 medial surfaces; Light guide plate 25 is close to the upper surface of reflecting plate 24 downsides; Blooming group 26 covers light guide plate 25 upper surfaces, and by framework 27 with above-mentioned component-assembled together; Reflecting plate 24 is L shaped, and the top of reflecting plate 24 and blooming group 26 are joined, thereby the light entrance face of the exiting surface of the reflecting surface of reflecting plate 24, LED light lamp group 21, light guide plate 25 and blooming group 26 constitute an enclosure space; The light entrance face of the exiting surface of LED light lamp group 21, light guide plate 25 and blooming group 26 are positioned at this enclosure space, have avoided light leak, have guaranteed that the light that LED light lamp group 21 is sent enters light guide plate 25 fully.Being arranged on the light that the through hole 241 on the reflecting plate 24 sends LED light lamp group 21 separates with LED light lamp group matrix, and offer some air holes 231 at respective leds lamp group 21 places, backboard 23 bottom surface, like this, the space at the remainder place of LED light lamp group except that light-emitting area is communicated with the space outerpace of side-lighting type light-emitting diode backlight source, guaranteed that the heat that LED light lamp group 21 is sent directly is dissipated in the air by air hole 231, has improved the heat dispersion of side-lighting type light-emitting diode backlight source.
Embodiment 2
Figure 3 shows that the diagrammatic cross-section of side-lighting type light-emitting diode backlight source embodiment two of the present invention, as shown in Figure 3, side-lighting type light-emitting diode backlight source comprises LED light lamp group 31, circuit board 32, backboard 33, reflecting plate 34, light guide plate 35, blooming group 36 and framework 37; In the present embodiment, the structural relation of LED light lamp group 31, framework 37, backboard 33, reflecting plate 34, light guide plate 35 and blooming group 36 is with embodiment one, and light guide plate 35 is close to the upper surface of reflecting plate 34 downsides; Blooming group 36 covers light guide plate 35 upper surfaces, and therefore, enclosure space is also identical with embodiment one; Difference is that LED light lamp group 31 is made up of the illuminated LED light lamp of side, therefore, and for the circuit board 32 of LED light lamp group power supply is mounted on the upper base surface of backboard 33, and by framework 37 with above-mentioned component-assembled together; The through hole 341 that is arranged on the reflecting plate 34 is separated LED light lamp group exiting surface and LED light lamp group matrix, and be provided with endoporus 331, the outer hole 371 that is communicated with space outerpace in framework 37 and backboard 33 overlapping parts, promptly offer some endoporus 331, outer hole 371 at backboard 33 and respective leds lamp group 31 places, framework 37 side, the heat that LED light lamp group 31 is sent directly is dissipated in the air by endoporus 331, outer hole 371.
Fig. 4 is the diagrammatic cross-section of side-lighting type light-emitting diode backlight source embodiment three of the present invention, as shown in Figure 4, side-lighting type light-emitting diode backlight source comprises LED light lamp group 41, circuit board 42, backboard 43, reflecting plate 44, light guide plate 45, blooming group 46 and framework 47; In the present embodiment, the structural relation of LED light lamp group 41, framework 47, reflecting plate 44, light guide plate 45 and blooming group 46 is with embodiment one, and light guide plate 45 is close to the upper surface of reflecting plate 44 downsides; Blooming group 46 covers light guide plate 45 upper surfaces, and therefore, enclosure space is also identical with embodiment one; Difference is that the edge of backboard 43 is n shape, and LED light lamp group 41 is made up of top type light emitting diode lamp, and the circuit board 42 of LED light lamp group 41 power supplies is fixed on the inside surface of the wall portion at backboard 43 edges; The heat sent of LED light lamp group 41 is in meeting constrains in narrow and small cavity like this, but directly is communicated with space outerpace, and heat directly is dissipated in the air, further promoted radiating effect.
Embodiment 4
Fig. 5 is the diagrammatic cross-section of side-lighting type light-emitting diode backlight source embodiment four of the present invention, as shown in Figure 5, side-lighting type light-emitting diode backlight source comprises LED light lamp group 51, circuit board 52, backboard 53, reflecting plate 54, light guide plate 55, blooming group 56 and framework 57; In the present embodiment, the structural relation of LED light lamp group 51, framework 57, reflecting plate 54, light guide plate 55 and blooming group 56 is with embodiment one, and light guide plate 55 is close to reflecting plate 54 downside upper surfaces; Blooming group 56 covers light guide plate 55 upper surfaces, and therefore, enclosure space is also identical with embodiment one; Difference is that LED light lamp group 51 is made up of the illuminated LED light lamp of side; The edge of backboard 53 is η shape, is fixed on the lower surface at the top at backboard 53 edges for the circuit board 52 of LED light lamp group 51 power supplies.Like this, LED light lamp group 51 matrixes are exposed in the air fully, the heat that LED light lamp group 51 is sent and can directly be dissipated in the air not in meeting constrains in narrow and small cavity, has further promoted the radiating effect of side-lighting type light-emitting diode backlight source.
Fig. 6 is the diagrammatic cross-section of side view type light emitting diode backlight embodiment five of the present invention, as shown in Figure 6, side-lighting type light-emitting diode backlight source comprises LED light lamp group 61, circuit board 62, backboard 63, reflecting plate 64, light guide plate 65, blooming group 66 and framework 67; Present embodiment is similar to embodiment three, enclosure space is made of the light reflection surface of reflecting plate 64, the basal surface of blooming group 66 and the light entrance face of light guide plate 65, with the mode of communicating of space outerpace also for to offer the hole that is communicated with space outerpace at the backboard 63 and the lap of framework 67, in the present embodiment endoporus 631, outer hole 671; Difference is that the LED light lamp group has two groups, so has more the entrance port 641 of one group of light on the sidewall of reflecting plate 64; And it is I-shaped right half of that the edge of backboard 63 is, and another group LED light lamp group is positioned over the top lower surface at backboard 63 edges.
Fig. 7 is the diagrammatic cross-section of side view type light emitting diode backlight embodiment six of the present invention, as shown in Figure 7, side-lighting type light-emitting diode backlight source comprises LED light lamp group 71, circuit board 72, backboard 73, reflecting plate 74 and lampshade 75, light guide plate 76, blooming group 77 and framework 78; LED light lamp group 71 is made up of the illuminated LED light lamp of side, and LED light lamp group 71 directly is welded on the circuit board 72; Lampshade 75 is a square shape, is fixed in the cavity of backboard 73 and framework 78 formation, and two circuit boards 72 are fixed on lampshade 75 inside surfaces face-to-face, promptly lay respectively at the top lower surface of lampshade 75, the upper surface of bottom; The right wall of lampshade 75 has right hole 751, and institute's LED light lamp group is by 751 bright dippings of right hole; Like this, the enclosure space that the light entrance face of the right wall outer surface of lampshade 75, the exiting surface of LED light lamp group 71, light guide plate 76 and blooming group 77 constitute has been avoided the light leakage; And, the part that the left wall of lampshade 75, backboard 73, framework 78 are overlapping, be provided with the hole that is communicated with space outerpace, promptly, be arranged on the left hole 752 on the lampshade 75, mesopore 731 on the backboard 73 and the outer hole 781 on the framework 78, the heat that the LED light lamp group is sent directly is dissipated in the air by the left hole 752 on the lampshade 75, mesopore 731, outer hole 781.
It should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not limit it, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and these modifications or be equal to replacement and also can not make amended technical scheme break away from the spirit and scope of technical solution of the present invention.
Claims (7)
1. a side-lighting type light-emitting diode backlight source comprises LED light lamp group, light guide plate and blooming group, it is characterized in that,
Also comprise reflecting plate, described reflecting plate is L shaped, and the top of described reflecting plate and described blooming group are joined; And the light entrance face by the reflecting surface of described reflecting plate, the exiting surface of described LED light lamp group, described light guide plate constitutes an enclosure space with a part that is used to form the described blooming group of enclosure space;
The space at the remainder place of described LED light lamp group except that exiting surface is communicated with the space outerpace of described side-lighting type light-emitting diode backlight source.
2. side-lighting type light-emitting diode backlight source according to claim 1, it is characterized in that the space at the remainder place of described LED light lamp group except that exiting surface is communicated with the space outerpace of described side-lighting type light-emitting diode backlight source and is specially: the backboard bottom of described LED light lamp group below is provided with the hole that is communicated with described space outerpace.
3. side-lighting type light-emitting diode backlight source according to claim 1, it is characterized in that the space at the remainder place of described LED light lamp group except that exiting surface is communicated with the space outerpace of described side-lighting type light-emitting diode backlight source and is specially: the overlapping part of the framework of described side-lighting type light-emitting diode backlight source and the backboard of described side-lighting type light-emitting diode backlight source is provided with the hole that is communicated with described space outerpace.
4. side-lighting type light-emitting diode backlight source according to claim 1, it is characterized in that, the space at the remainder place of described LED light lamp group except that exiting surface is communicated with the space outerpace of described side-lighting type light-emitting diode backlight source and is specially: the edge of the backboard of the luminous back light source in LED of described side is n shape, described LED light lamp group is the luminous LED light lamp group in top, be positioned on the circuit board for the power supply of described LED light lamp group, described circuit board is fixed on the inside surface of wall portion at the edge of described backboard.
5. side-lighting type light-emitting diode backlight source according to claim 1, it is characterized in that, the space at the remainder place of described LED light lamp group except that exiting surface is communicated with the space outerpace of described side-lighting type light-emitting diode backlight source and is specially: the edge of the backboard of described side-lighting type light-emitting diode backlight source is η shape, described LED light lamp group is the luminous LED light lamp group of side, is fixed on the lower surface at top at the edge of described backboard for the circuit board of described LED light lamp group power supply.
6. side-lighting type light-emitting diode backlight source according to claim 1, it is characterized in that, the space at the remainder place of described LED light lamp group except that exiting surface is communicated with the space outerpace of described side-lighting type light-emitting diode backlight source and is specially: the edge of the backboard of the luminous back light source in LED of described side is I-shaped right half of, described LED light lamp group is two side-lighting type light-emitting diode lamp groups, two circuit boards for described two side-lighting type light-emitting diode lamp groups power supply, lay respectively at the top lower surface at the edge of described backboard, the upper surface of bottom, the overlapping part of described backboard and backboard is provided with the hole that is communicated with described space outerpace.
7. a side-lighting type light-emitting diode backlight source comprises LED light lamp group, light guide plate and blooming group, it is characterized in that, also comprise lampshade, described lampshade is a square shape, and the right wall of described lampshade has the hole, and described LED light lamp group is by the hole bright dipping on the right wall of described lampshade;
And the light entrance face by the right wall outer surface of described lampshade, the exiting surface of described LED light lamp group, described light guide plate constitutes an enclosure space with a part that is used to form the described blooming group of enclosure space;
Described LED light lamp group is two groups of luminous LED light lamp groups of side, and two circuit boards for the luminous light emitting diode power supply of described two groups of sides lay respectively at the top lower surface of described lampshade, the upper surface of bottom;
The overlapping part of the backboard of the left wall of described lampshade, described side-lighting type light-emitting diode backlight source and framework is provided with the hole that is communicated with described space outerpace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101136766A CN101307894B (en) | 2008-05-29 | 2008-05-29 | Side light type luminous diode backlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101136766A CN101307894B (en) | 2008-05-29 | 2008-05-29 | Side light type luminous diode backlight |
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| CN101307894A CN101307894A (en) | 2008-11-19 |
| CN101307894B true CN101307894B (en) | 2010-09-08 |
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| CN2008101136766A Active CN101307894B (en) | 2008-05-29 | 2008-05-29 | Side light type luminous diode backlight |
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Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102374449A (en) * | 2010-08-09 | 2012-03-14 | 荣晋精密科技股份有限公司 | Light-emitting unit and backlight module comprising same |
| TWI451168B (en) | 2010-09-09 | 2014-09-01 | Au Optronics Corp | Backlight structure and manufacturing method thereof |
| CN101936509A (en) * | 2010-09-20 | 2011-01-05 | 友达光电股份有限公司 | Backlight structure and production method thereof |
| CN102506350B (en) * | 2011-11-01 | 2013-12-25 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN102518984A (en) * | 2011-11-23 | 2012-06-27 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN102494276B (en) * | 2011-12-02 | 2013-11-27 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN102620204B (en) * | 2012-03-27 | 2015-05-20 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device comprising same |
| CN102620203B (en) * | 2012-03-27 | 2014-07-30 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| US9104068B2 (en) | 2012-03-27 | 2015-08-11 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Backlight module and LCD device comprising backlight module |
| CN102661533A (en) * | 2012-04-11 | 2012-09-12 | 深圳市华星光电技术有限公司 | Backlight module and LCD (liquid crystal display) device |
| US20130271691A1 (en) * | 2012-04-11 | 2013-10-17 | Yajun Yu | Backlight Module and LCD Device |
| CN103527979B (en) * | 2013-10-12 | 2016-03-30 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| US9389354B2 (en) | 2013-12-16 | 2016-07-12 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Backlight module |
| CN103672620B (en) * | 2013-12-16 | 2015-09-09 | 深圳市华星光电技术有限公司 | Backlight module |
| TWI557479B (en) | 2014-02-27 | 2016-11-11 | 群創光電股份有限公司 | Backlight module |
| CN105204107B (en) * | 2015-09-11 | 2018-08-24 | 深圳市华星光电技术有限公司 | Liquid crystal display device and its backlight module |
| CN106842695A (en) * | 2016-12-19 | 2017-06-13 | 武汉华星光电技术有限公司 | A kind of glue frame, backlight module and liquid crystal display |
| CN109270737A (en) * | 2018-10-26 | 2019-01-25 | 蚌埠国显科技有限公司 | A kind of novel liquid crystal display module containing radiating block |
| CN111025753A (en) * | 2019-12-13 | 2020-04-17 | 武汉华星光电技术有限公司 | Backlight module and display device |
| CN112684637B (en) * | 2021-01-25 | 2021-08-20 | 深圳市云湖电子科技有限公司 | Backlight that spotlight nature is good |
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2008
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