CN103672622A - Backlight module based on double reflectors - Google Patents
Backlight module based on double reflectors Download PDFInfo
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- CN103672622A CN103672622A CN201310704551.1A CN201310704551A CN103672622A CN 103672622 A CN103672622 A CN 103672622A CN 201310704551 A CN201310704551 A CN 201310704551A CN 103672622 A CN103672622 A CN 103672622A
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- backlight module
- reflecting mirror
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Abstract
The invention discloses a backlight module based on double reflectors. The backlight module comprises the first holophote, an LED point light source arranged on the first holophote and the partial reflector, wherein a certain distance exists between the first holophote and the partial reflector, and the partial reflector is arranged on the light emitting face of the backlight module. Emergent light rays of the LED point light source are reflected multiple times by the first holophote and the partial reflector and then are transmitted out from the partial reflector. According to the backlight module based on the double reflectors, the light rays of the LED point light source are reflected multiple times through the holophote and the partial reflector, so that the light rays are made to be evenly distributed on the light emitting face finally, as a result, the point light source is directly converted into an area light source, a brightening sheet and a diffusion sheet are not needed, and therefore the production cost is reduced; in addition, the light utilization efficiency of the backlight module is high, so that energy consumption and cost are reduced; besides, the module thickness of the backlight module can be further reduced, and therefore the backlight module based on the double reflectors fits in with the development tendency that liquid crystal display televisions become lighter and thinner.
Description
Technical field
The present invention relates to LCD Technology field, relate in particular to a kind of backlight module based on double mirror.
Background technology
LED LCD TV, with advantages such as outstanding image quality, appearance and size and low energy consumption, successfully enters field of television, and becomes gradually the main product of TV.LED LCD TV mainly divides two types at present: side entering type (being that light emitting source is arranged on side) and straight-down negative (being under light emitting source is arranged on).Side entering type TV can be done very thinly, but its light utilization ratio is low compared with straight-down negative television set, and production cost is higher; Straight-down negative TV has high briliancy, the advantage that light utilization ratio is high, but it is thicker with respect to side entering type TV.Therefore, it is lightening that the LED LCD TV of two types all can not meet television set simultaneously, low power consumption, cheaply development trend.
Therefore, prior art need development.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of backlight module based on double mirror, be intended to solve current LED LCD TV and can not take into account lightening design and problem cheaply simultaneously.
Technical scheme of the present invention is as follows:
A kind of backlight module based on double mirror, wherein, described backlight module comprises the first completely reflecting mirror, is arranged on LED spot light on described the first completely reflecting mirror, with described the first completely reflecting mirror interval preset distance and be arranged on the partially reflecting mirror on described backlight module exiting surface, the emergent ray of described LED spot light is gone out from described partially reflecting mirror transmission after the multiple reflections of described the first completely reflecting mirror and partially reflecting mirror.
The described backlight module based on double mirror, wherein, described the first completely reflecting mirror and described partially reflecting mirror be arranged in parallel.
The described backlight module based on double mirror, wherein, described preset distance is 18-22mm.
The described backlight module based on double mirror, wherein, described preset distance is 20mm.
The described backlight module based on double mirror, wherein, the reflectance factor of described partially reflecting mirror is more than 97%.
The described backlight module based on double mirror, wherein, the reflectance factor of described partially reflecting mirror is 97%.
The described backlight module based on double mirror, wherein, described LED spot light is set to a plurality of, and described a plurality of LED spot lights are evenly distributed on described the first completely reflecting mirror.
The described backlight module based on double mirror, wherein, the side of described backlight module is provided with for sealing the second completely reflecting mirror of whole backlight module.
The described backlight module based on double mirror, wherein, the spatial placement between described the first completely reflecting mirror and partially reflecting mirror is vacuum environment.
Beneficial effect: a kind of backlight module based on double mirror is provided in the present invention, by completely reflecting mirror and partially reflecting mirror are set, the light of LED light source is carried out to multiple reflections, make its light finally be evenly distributed on exiting surface, directly spot light is changed into area source, without using blast sheet and diffusion sheet, reduced production cost, backlight module light utilization ratio of the present invention is high, reduced LED the number using, energy consumption and cost have been reduced, the further attenuation of backlight module module thickness, has adapted to the lightening development trend of LCD TV simultaneously.
Accompanying drawing explanation
Fig. 1 is the backlight module emission of light schematic diagram based on double mirror in the specific embodiment of the invention.
Fig. 2 is the design principle schematic diagram of the backlight module based on double mirror of the present invention.
Fig. 3 is the structural representation of the backlight module based on double mirror in the specific embodiment of the invention.
Fig. 4 is the structural representation of the backlight module based on double mirror in preferred embodiment of the present invention.
The specific embodiment
The invention provides a kind of backlight module based on double mirror, for making object of the present invention, technical scheme and effect clearer, clear and definite, below the present invention is described in more detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
A kind of backlight module based on double mirror as shown in figures 1 and 3, wherein, described backlight module comprises the first completely reflecting mirror 100, is arranged on LED spot light 300 on described the first completely reflecting mirror, with described the first completely reflecting mirror interval preset distance and be arranged on the partially reflecting mirror 200 on described backlight module exiting surface, concrete, described the first completely reflecting mirror and described partially reflecting mirror be arranged in parallel.The emergent ray of described LED spot light is gone out from described partially reflecting mirror transmission after the multiple reflections of described the first completely reflecting mirror and partially reflecting mirror.
LED liquid crystal module need to obtain at exiting surface place more uniform emergent ray, if light is parallel or connect subparallel light when this just requires light that light source sends to arrive exiting surface, in traditional directly-down liquid crystal TV module, be to realize the parallel of emergent ray or closely parallel by diffuser plate is set.What the present invention utilized is that spot light can become this principle of directional light after the propagation through infinite distance, as shown in Figure 2, if light is after unlimited reflection, formed virtual LED spot light 10 is just at unlimited distance, just being equivalent to light irradiates and comes from unlimited distance, the present invention is by arranging the first completely reflecting mirror and partially reflecting mirror, make to be positioned at the light that LED spot light between the two sends penetrates after enough reflections repeatedly, make light reach approximately parallel effect, so just met the requirement of LEC liquid crystal module emergent ray.
Impact by LightTools software analysis LED point-source light ray transmitting range on receiving plane light effects, analysis result shows, the effect satisfied condition of doing TV backlight of the emergent ray of LED spot light after the propagation arrival receiving plane of 1000mm.In backlight module based on double mirror of the present invention, the distance between described the first completely reflecting mirror and partially reflecting mirror is set as 18-22mm.Preferably 20mm.Based on 20mm distance, emergent ray will reflect altogether and just can reach the distance effect of irradiating 1000mm for approximately 50 times, and light is 25 times (have is for 25 times to be reflected by the first completely reflecting mirror) by the number of times of partially reflecting mirror.In addition, the reflectance factor of partially reflecting mirror of the present invention is more than 97%, and preferably reflectance factor is 97%.97% the reflectance factor of take is example, approximately has 0.97
25=46.7% light at least can reach above effect, and if the reflectance factor of partially reflecting mirror is 98%, approximately have 0.98
25=60.3% light at least can reach above effect.So the present invention is that more than 97% partially reflecting mirror has guaranteed that at least 50% can reach the distance effect of irradiating 1000mm with light by 18-22mm between the first completely reflecting mirror and partially reflecting mirror distance being set and using reflectance factor, 50% the luminous energy of take reaches above effect as critical point, be the light of better effects and if effect more the light of " bad " respectively have 50%, make its separately effect can cancel out each other.Thereby finally make emergent ray can meet the light requirement of LED LCD TV exiting surface.
Certainly, the reflectance factor that increases partially reflecting mirror can make light more even, but can make optical energy loss more, the distance that increases completely reflecting mirror and partially reflecting mirror also can make uniformity higher, but can increase thickness backlight, the reflectance factor of partially reflecting mirror described in the preferred embodiment that the present invention provides is 97%, the distance of described the first completely reflecting mirror and partially reflecting mirror is 20mm, can make each performance reach balanced, guaranteeing to have reduced light loss of energy in the uniform situation of light as far as possible, distance setting also meets the lightening requirement of current liquid crystal module simultaneously, therefore make backlight module of the present invention there is best combination property.
In preferred embodiment as shown in Figure 4, described LED spot light is set to a plurality of, and described a plurality of LED spot lights are evenly distributed on described the first completely reflecting mirror, increases the quantity of LED, by a plurality of LED spot lights, not only can make light uniformity higher, can also increase brightness.
In preferred embodiment, the side of described backlight module is provided with for sealing the second completely reflecting mirror 400 of whole backlight module.By the second completely reflecting mirror, the light of beating at side can be reflected back to re-using, improve light utilization ratio, reduce energy loss.
In preferred embodiment, the spatial placement between described the first completely reflecting mirror and partially reflecting mirror is vacuum environment.The spatial placement soon being impaled by described the first completely reflecting mirror, partially reflecting mirror and the second completely reflecting mirror is vacuum state, can further improve so the inhomogeneity propagation efficiency of light, less energy loss.Improved the luminescent properties of backlight module.
A kind of backlight module based on double mirror is provided in the present invention, by completely reflecting mirror and partially reflecting mirror are set, the light of LED light source is carried out to multiple reflections, make its light finally be evenly distributed on exiting surface, directly spot light is changed into area source, without using blast sheet and diffusion sheet, reduced production cost, backlight module light utilization ratio of the present invention is high, energy consumption and cost have been reduced, the further attenuation of backlight module module thickness, has adapted to the lightening development trend of LCD TV simultaneously.
Should be understood that, application of the present invention is not limited to above-mentioned giving an example, and for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (9)
1. the backlight module based on double mirror, it is characterized in that, described backlight module comprises the first completely reflecting mirror, is arranged on LED spot light on described the first completely reflecting mirror, with described the first completely reflecting mirror interval preset distance and be arranged on the partially reflecting mirror on described backlight module exiting surface, the emergent ray of described LED spot light is gone out from described partially reflecting mirror transmission after the multiple reflections of described the first completely reflecting mirror and partially reflecting mirror.
2. the backlight module based on double mirror according to claim 1, is characterized in that, described the first completely reflecting mirror and described partially reflecting mirror be arranged in parallel.
3. the backlight module based on double mirror according to claim 1, is characterized in that, described preset distance is 18-22mm.
4. the backlight module based on double mirror according to claim 3, is characterized in that, described preset distance is 20mm.
5. the backlight module based on double mirror according to claim 1, is characterized in that, the reflectance factor of described partially reflecting mirror is more than 97%.
6. the backlight module based on double mirror according to claim 5, is characterized in that, the reflectance factor of described partially reflecting mirror is 97%.
7. the backlight module based on double mirror according to claim 1, is characterized in that, described LED spot light is set to a plurality of, and described a plurality of LED spot lights are evenly distributed on described the first completely reflecting mirror.
8. the backlight module based on double mirror according to claim 1, is characterized in that, the side of described backlight module is provided with for sealing the second completely reflecting mirror of whole backlight module.
9. the backlight module based on double mirror according to claim 1, is characterized in that, the spatial placement between described the first completely reflecting mirror and partially reflecting mirror is vacuum environment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310704551.1A CN103672622B (en) | 2013-12-20 | 2013-12-20 | A kind of backlight module based on double mirror |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310704551.1A CN103672622B (en) | 2013-12-20 | 2013-12-20 | A kind of backlight module based on double mirror |
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| CN103672622A true CN103672622A (en) | 2014-03-26 |
| CN103672622B CN103672622B (en) | 2017-12-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334662A (en) * | 2015-11-16 | 2016-02-17 | 合一智能科技（深圳）有限公司 | Side light type backlight module |
| US20200333547A1 (en) * | 2019-04-18 | 2020-10-22 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Reflective device |
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| US20070047261A1 (en) * | 2005-08-27 | 2007-03-01 | Thompson David S | Direct-lit backlight having light recycling cavity with concave transflector |
| WO2007086347A1 (en) * | 2006-01-27 | 2007-08-02 | Opto Design, Inc. | Planar illumination light source device and planar illumination device using the same |
| CN101681054A (en) * | 2007-03-16 | 2010-03-24 | 克里公司 | Has back light unit of vertical inner reflector and forming method thereof |
| CN102644883A (en) * | 2011-03-25 | 2012-08-22 | 京东方科技集团股份有限公司 | Direct type backlight source |
| CN103235352A (en) * | 2013-04-07 | 2013-08-07 | 创维液晶器件(深圳)有限公司 | Optical thin film and direct type backlight module |
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| JP2001351424A (en) * | 2000-06-06 | 2001-12-21 | Fuji Electric Ind Co Ltd | Plane light-emitting device |
| JP2005352426A (en) * | 2004-06-14 | 2005-12-22 | Sony Corp | Back light device and liquid crystal display device |
| US20070047261A1 (en) * | 2005-08-27 | 2007-03-01 | Thompson David S | Direct-lit backlight having light recycling cavity with concave transflector |
| WO2007086347A1 (en) * | 2006-01-27 | 2007-08-02 | Opto Design, Inc. | Planar illumination light source device and planar illumination device using the same |
| CN101681054A (en) * | 2007-03-16 | 2010-03-24 | 克里公司 | Has back light unit of vertical inner reflector and forming method thereof |
| CN102644883A (en) * | 2011-03-25 | 2012-08-22 | 京东方科技集团股份有限公司 | Direct type backlight source |
| CN103235352A (en) * | 2013-04-07 | 2013-08-07 | 创维液晶器件(深圳)有限公司 | Optical thin film and direct type backlight module |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334662A (en) * | 2015-11-16 | 2016-02-17 | 合一智能科技（深圳）有限公司 | Side light type backlight module |
| US20200333547A1 (en) * | 2019-04-18 | 2020-10-22 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Reflective device |
| US11914214B2 (en) * | 2019-04-18 | 2024-02-27 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Reflective device |
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| Publication number | Publication date |
|---|---|
| CN103672622B (en) | 2017-12-22 |
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Effective date of registration: 20191211 Address after: 239000 No. 999, Central Avenue, Chuzhou, Anhui Co-patentee after: Shenzhen Xiaojia Technology Co.,Ltd. Patentee after: ANHUI KONKA ELECTRONICS Co.,Ltd. Co-patentee after: KONKA GROUP Co.,Ltd. Address before: 15-24 / F, Kangjia R & D building, No. 28, Keji South 12th Road, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province Co-patentee before: ANHUI KONKA ELECTRONICS Co.,Ltd. Patentee before: KONKA GROUP Co.,Ltd. Co-patentee before: Shenzhen Xiaojia Technology Co.,Ltd. Effective date of registration: 20191211 Address after: 518000 15-24 / F, Kangjia R & D building, No. 28, Keji South 12th Road, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province Co-patentee after: ANHUI KONKA ELECTRONICS Co.,Ltd. Patentee after: KONKA GROUP Co.,Ltd. Co-patentee after: Shenzhen Xiaojia Technology Co.,Ltd. Address before: 518053 No. 9008 Shennan Avenue, overseas Chinese town, Shenzhen, Guangdong, Nanshan District Patentee before: KONKA GROUP Co.,Ltd. |