CN101349397A - Backlight system and microstructure reflector plate - Google Patents
Backlight system and microstructure reflector plate Download PDFInfo
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- CN101349397A CN101349397A CNA2007100752624A CN200710075262A CN101349397A CN 101349397 A CN101349397 A CN 101349397A CN A2007100752624 A CNA2007100752624 A CN A2007100752624A CN 200710075262 A CN200710075262 A CN 200710075262A CN 101349397 A CN101349397 A CN 101349397A
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Abstract
The invention relates to a backlight system and a microstructure reflector plate thereof, the backlight system comprises a light guide plate, a light source and a reflector plate, wherein the light guide plate is provided with a light inlet surface, a light outlet surface and a bottom surface which is opposite to the light outlet surface, the light source is arranged near the light inlet surface, the reflector plate is arranged near the bottom surface, and the reflector plate is equipped with a micro-reflection structure. Simultaneously, the invention also relates to a microstructure reflector plate, which is used in the backlight system for displaying of a passive lighting flat-panel, and is provided with a micro-reflection structure. By means of the above structure, light can be reflected by utilizing the reflection surface of the micro-reflection structure of the reflector plate, a light reflecting field can be modulated by changing the inclination angle of the reflection surface, the brightness value in an ideal vision field of the light guide plate can be further increased, therefore the design has flexibility and commonality, and can reduce or avoid using traditional prism sheets, thereby simplifying the device structure, increasing the optical energy usage, and reducing the cost.
Description
[technical field]
The present invention relates to a kind of back light system and microstructure reflector plate thereof, be specifically related to a kind of back light system and reflector plate thereof that passive active flat panel shows that be used for.
[background technology]
Existing passive active flat panel shows, for example (Light crystal display LCD) has in light weight, thin thickness, low energy consumption, advantage such as radiationless, thereby is widely used in fields such as mobile phone, digital camera, video camera, mp3 LCD.Because liquid crystal material itself does not possess the characteristics of luminescence, so need realize Presentation Function for it provides the additional source of light system.
As shown in Figure 1, Fig. 1 is the structural representation of Minnesota Mining and Manufacturing Company's related a kind of existing back light system in the U.S. Patent No. 6,443,583 of bulletin on September 3rd, 2002.This back light system comprises light source 11, LGP 12, reflector plate 13, diffusion sheet 14 and prismatic lens 15,16, and wherein prismatic lens 15,16 is provided with orthogonal micro-prism structure.The light that light source 11 is sent enters LGP 12 inside through the incidence surface of LGP 12, exports by reflector plate 13 reflections of the below, bottom surface that is arranged on LGP 12 and through the exiting surface of LGP 12.The bottom surface of LGP 12 further is provided with stipple pattern, so that LGP 12 internal transmission light are carried out scattering, and then realizes area source output and reaches equal light effect.Through the light of the exiting surface of LGP 12 output is carried out further all light by diffusion sheet 14 after, assemble at orthogonal both direction by the micro-prism structure of prismatic lens 15,16 again, emergent light is focused near positive and negative 25 scopes of spending of exiting surface normal of LGP 12, to improve display brightness.
As shown in Figure 2, Fig. 2 is the structural representation of another kind of existing back light system.This back light system comprises light source 21, LGP 22, reflector plate 23, diffusion sheet 24 and prismatic lens 25 equally, the difference of itself and back light system shown in Figure 1 is: the exiting surface of LGP 22 is provided with V-arrangement prism structure (V-cut), and prismatic lens 25 is a slice zigzag prismatic lens down.By a slice prismatic lens that adopted this structure decrease, reduced manufacturing cost, simultaneously light utilization efficiency has been improved 30%.
Above-mentioned patent and present known other back light system adopt at least, and a slice individual prisms sheet carries out optically focused, many and the manufacturing cost height of the number of elements of module backlight, can't satisfy the simplification and the integrated trend of module backlight, the light loss at interface also can cause light utilization efficiency to reduce between the independent component simultaneously.In addition, above-mentioned patent and present known other back light system all adopt the plane reflection sheet, and its effect only is the light reflected back LGP inside of will appear from bottom surface of light guide plate.
[summary of the invention]
In order to need the emergent light of LGP to be carried out optically focused in the back light system that solves prior art by at least one individual prisms sheet, the technical problem that the number of elements of back light system is many, manufacturing cost is high and light utilization efficiency is low the invention provides and a kind ofly utilizes the micro-reflection structure on the reflector plate that the emergent light of LGP is modulated and assembled to reduce or to avoid the back light system and the reflector plate of prismatic lens usage quantity.
The present invention solves to be needed in the back light system of prior art by at least one individual prisms sheet the emergent light of LGP to be carried out optically focused, the technical problem that the number of elements of module backlight is many, manufacturing cost is high and light utilization efficiency is low.The technical scheme that is adopted is: a kind of back light system is provided, and described back light system comprises: have incidence surface, exiting surface and with the LGP of described exiting surface opposed bottom surface; Be arranged near the light source of described incidence surface, and be arranged near the reflector plate the described bottom surface, described reflector plate is provided with micro-reflection structure.
According to one preferred embodiment of the present invention, described micro-reflection structure has the reflecting surface that tilts with described exiting surface.
According to one preferred embodiment of the present invention, described micro-reflection structure is prism, pyramid or terrace with edge.
According to one preferred embodiment of the present invention, described micro-reflection structure surface is provided with reflectance coating.
According to one preferred embodiment of the present invention, the physical dimension of described micro-reflection structure evenly increases on distribution or the edge direction away from described incidence surface; The distribution density of described micro-reflection structure evenly increases on distribution or the edge direction away from described incidence surface.
According to one preferred embodiment of the present invention, the bottom width of described micro-reflection structure is 10 μ m-1000 μ m.
The present invention solves the technical scheme that existing technical problem adopts: a kind of microstructure reflector plate that is used for the back light system that passive active flat panel shows is provided, and described reflector plate is provided with micro-reflection structure.
According to one preferred embodiment of the present invention, described micro-reflection structure has the reflecting surface that tilts with described exiting surface.
According to one preferred embodiment of the present invention, described micro-reflection structure is prism, pyramid or terrace with edge.
According to one preferred embodiment of the present invention, the physical dimension of described micro-reflection structure evenly increases on distribution or the edge direction away from described incidence surface; The distribution density of described micro-reflection structure evenly increases on distribution or the edge direction away from described incidence surface.
Pass through said structure, utilize the micro-reflection structure surface of microstructure reflector plate that light is reflected, and modulate the outgoing light field by the inclination angle that changes micro-structural, improve the brightness value in the desirable visual field of LGP, its design has flexibility, versatility, applicable to existing various forms of LGPs, and can reduce or avoid traditional prismatic lens, the simplification device structure, the raising efficiency of light energy utilization also reduces cost.
[description of drawings]
Fig. 1 is a kind of structural representation of existing back light system;
Fig. 2 is the structural representation of another kind of existing back light system;
Fig. 3 is the structural representation of back light system one embodiment of the present invention;
Fig. 4 is structure and the local enlarged diagram of reflector plate one embodiment of the present invention;
Fig. 5 is the structural representation of another embodiment of micro-reflection structure of reflector plate of the present invention;
Fig. 6 is the micro-reflection structure structural representation of an embodiment again of reflector plate of the present invention;
Fig. 7 is the schematic diagram of arrangement mode one embodiment of the micro-reflection structure of reflector plate of the present invention;
Fig. 8 is the schematic diagram of another embodiment of arrangement mode of the micro-reflection structure of reflector plate of the present invention.
[specific embodiment]
As shown in Figure 3, Fig. 3 is the structural representation of back light system one embodiment of the present invention.In the back light system of present embodiment, comprise: light source 31, LGP 32 and reflector plate 33.Wherein, LGP 32 comprise the incidence surface that is used to receive light source 31 and emits beam, the exiting surface that is used for emergent ray and with the exiting surface opposed bottom surface.That the shape of LGP 32 can adopt is plate shaped, wedge shape or other suitable shape, thickness is generally 0.1mm-50mm, material is chosen from translucent material, adopts allyl resin or polycarbonate resin usually, and preferably refractive index is 1.49 polymethyl methacrylate (PMMA).Light source 31 can adopt present known led light source, cathode fluorescent tube or other suitable light source, and is arranged in a suitable manner near the incidence surface of LGP 32.33 belows that are arranged on the bottom surface of LGP 32 of reflector plate are used to reflect the light that appears from this bottom surface.This bottom surface can further include various diffusing structures, and for example printing net-point or the scattering netted dot made with molding mode so that the transmission ray of LGP 32 inside is carried out scattering, and then are realized area source output and kept LGP 32 to go out uniformity of light.
As shown in Figure 4, Fig. 4 is structure and the local enlarged diagram of reflector plate one embodiment of the present invention.In the present embodiment, the micro-reflection structure on the reflector plate 33 is a prismatic shape micro-reflection structure 331, and this prismatic shape micro-reflection structure 331 extends on the direction of the incidence surface that is parallel to LGP 32 and has a reflecting surface that the exiting surface with LGP 32 tilts.After being reflected at a predetermined angle by the reflecting surface of prismatic shape micro-reflection structure 331, the light of the bottom surface of LGP 32 transmission enters LGP 32 once more, and through the exiting surface outgoing of LGP 32.In the present embodiment, the bottom width of prismatic shape micro-reflection structure 331 is preferably 10 μ m-1000 μ m, and regulate the reflection direction of the light that appears through the bottom surface of LGP 32 by base angle (reflecting surface inclination angle), height and the distribution density that changes prismatic shape micro-reflection structure 331, reach thus the outgoing light field is assembled, increase brightness value and the purpose that improves the efficiency of light energy utilization in the desirable visual field.
Micro-reflection structure of the present invention is not limited to prismatic shape, but can design multi-form structure according to actual conditions.For example, disclose two kinds of multi-form micro-reflection structures that are applicable to reflector plate of the present invention among Fig. 5 and Fig. 6 respectively, wherein the micro-reflection structure of Fig. 5 is a terrace with edge shape, and the micro-reflection structure of Fig. 6 then is a pyramid.Micro-reflection structure of the present invention can be made by moulding on the substrate of predetermined material, or make with micro-optics, binary optical processing method, for example methods such as laser direct-writing method, photoetching, etching are made the structure of required form, and apply the reflectance coating realization of suitable material at this body structure surface.
In addition, regulate and high uniformity in order to realize the outgoing brightness peak, can regulate the physical dimension or the distribution density of micro-reflection structure according to different design needs, the physical dimension of this micro-reflection structure, distribution density all can evenly distribute or increase on the direction away from this incidence surface.。As shown in Figure 7 and Figure 8, micro-reflection structure among Fig. 7 adopts evenly and distributes, the physical dimension of the micro-reflection structure of Fig. 8 then is to increase gradually on away from the direction of LGP incidence surface, so that according to the distance adjustment reflected intensity and the angle of distance LGP incidence surface, thereby the brightness peak of realizing the outgoing light field is regulated and high uniformity.Certainly, those of ordinary skills' physical dimension that can expect regulating micro-reflection structure fully increases gradually going into away from LGP on the light direction.
Reflector plate with micro-reflection structure proposed by the invention is applicable in existing common LGP (exiting surface is the plane) and the integrated LGP (exiting surface has the micro-optics concentration structure), and it has very strong versatility.Because reflector plate of the present invention has carried out brightness regulation in the LGP bottom, thereby only need a slice prismatic lens be set and realize twocouese optically focused in that the situation of common LGP is next at the LGP exiting surface, then need not to be provided with prismatic lens at integrated LGP, and then reduced number of elements, avoided the light loss of component interface, improve light utilization efficiency, satisfied the integrated trend of back light system simultaneously.Can find by experiment, when being applied to common LGP, the brightness value of back light system and uniformity can be near the back light systems of traditional double prismatic lens configuration, and when being used for integrated LGP, brightness value can reach 1.5 times of traditional double prismatic lens configuration back light system.In addition, reflector plate of the present invention can solve the conventional planar reflector plate and be applied to the brightness skew problem that occurs in the integrated LGP, well the peak value of outgoing light field is adjusted to our needed visual field, has very strong flexibility.
In the above-described embodiments, only the present invention has been carried out exemplary description, but those skilled in the art can design various embodiments according to different actual needs under the situation of the scope and spirit that do not break away from the present invention and protected.
Claims (10)
1. back light system, described back light system comprises:
Have incidence surface, exiting surface and with the LGP of described exiting surface opposed bottom surface;
Be arranged near the light source of described incidence surface, and
Be arranged near the reflector plate in described bottom surface,
It is characterized in that: described reflector plate is provided with micro-reflection structure.
2. back light system according to claim 1 is characterized in that: described micro-reflection structure has the reflecting surface with described exiting surface inclination.
3. back light system according to claim 2 is characterized in that: described micro-reflection structure is prismatic shape, pyramid or terrace with edge.
4. according to claim 2 or 3 described back light systems, it is characterized in that: described micro-reflection structure surface is provided with reflectance coating.
5. back light system according to claim 1 is characterized in that: the physical dimension of described micro-reflection structure evenly increases on distribution or the edge direction away from described incidence surface; The distribution density of described micro-reflection structure evenly increases on distribution or the edge direction away from described incidence surface.
6. back light system according to claim 1 is characterized in that: the bottom width of described micro-reflection structure is 10 μ m-1000 μ m.
7. microstructure reflector plate that is used for the back light system that passive active flat panel shows, it is characterized in that: described reflector plate is provided with micro-reflection structure.
8. reflector plate according to claim 7 is characterized in that: described micro-reflection structure has the reflecting surface with described exiting surface inclination.
9. back light system according to claim 1 is characterized in that: described micro-reflection structure is prism, pyramid or terrace with edge.
10. back light system according to claim 1 is characterized in that: the physical dimension of described micro-reflection structure evenly increases on distribution or the edge direction away from described incidence surface; The distribution density of described micro-reflection structure evenly increases on distribution or the edge direction away from described incidence surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100752624A CN101349397A (en) | 2007-07-20 | 2007-07-20 | Backlight system and microstructure reflector plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100752624A CN101349397A (en) | 2007-07-20 | 2007-07-20 | Backlight system and microstructure reflector plate |
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| CN101349397A true CN101349397A (en) | 2009-01-21 |
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| CNA2007100752624A Pending CN101349397A (en) | 2007-07-20 | 2007-07-20 | Backlight system and microstructure reflector plate |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192450A (en) * | 2011-05-31 | 2011-09-21 | 中航华东光电有限公司 | Backlight module and liquid crystal display device |
| CN102374390A (en) * | 2010-08-09 | 2012-03-14 | 东莞万士达液晶显示器有限公司 | Columnar luminous module |
| CN102518974A (en) * | 2012-01-13 | 2012-06-27 | 上海向隆电子科技有限公司 | Light-emitting module and manufacturing method thereof |
| CN103162178A (en) * | 2011-12-08 | 2013-06-19 | 奇美实业股份有限公司 | Light emitting device, downward lighting type lamp and light guide plate for downward lighting type lamp |
| CN105158833A (en) * | 2015-10-16 | 2015-12-16 | 京东方科技集团股份有限公司 | Composite reflector plate, backlight source, and display device |
| CN106168691A (en) * | 2016-09-27 | 2016-11-30 | 信利半导体有限公司 | A kind of reflector plate, backlight and liquid crystal display module |
| US10502885B2 (en) | 2016-10-19 | 2019-12-10 | Nano Precision Taiwan Limited | Light source module |
| WO2022111679A1 (en) * | 2020-11-30 | 2022-06-02 | 华为技术有限公司 | Backlight module and display screen |
-
2007
- 2007-07-20 CN CNA2007100752624A patent/CN101349397A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374390A (en) * | 2010-08-09 | 2012-03-14 | 东莞万士达液晶显示器有限公司 | Columnar luminous module |
| CN102192450A (en) * | 2011-05-31 | 2011-09-21 | 中航华东光电有限公司 | Backlight module and liquid crystal display device |
| CN102192450B (en) * | 2011-05-31 | 2014-04-09 | 中航华东光电有限公司 | Backlight module and liquid crystal display device |
| CN103162178A (en) * | 2011-12-08 | 2013-06-19 | 奇美实业股份有限公司 | Light emitting device, downward lighting type lamp and light guide plate for downward lighting type lamp |
| CN103162178B (en) * | 2011-12-08 | 2016-05-11 | 奇美实业股份有限公司 | Light emitting device, downward lighting type lamp and light guide plate for downward lighting type lamp |
| CN102518974A (en) * | 2012-01-13 | 2012-06-27 | 上海向隆电子科技有限公司 | Light-emitting module and manufacturing method thereof |
| CN105158833A (en) * | 2015-10-16 | 2015-12-16 | 京东方科技集团股份有限公司 | Composite reflector plate, backlight source, and display device |
| CN106168691A (en) * | 2016-09-27 | 2016-11-30 | 信利半导体有限公司 | A kind of reflector plate, backlight and liquid crystal display module |
| US10502885B2 (en) | 2016-10-19 | 2019-12-10 | Nano Precision Taiwan Limited | Light source module |
| WO2022111679A1 (en) * | 2020-11-30 | 2022-06-02 | 华为技术有限公司 | Backlight module and display screen |
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Open date: 20090121 |