CN202870337U - Multi-layer optical conductor, backlight module and display device - Google Patents
Multi-layer optical conductor, backlight module and display device Download PDFInfo
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- CN202870337U CN202870337U CN 201220572557 CN201220572557U CN202870337U CN 202870337 U CN202870337 U CN 202870337U CN 201220572557 CN201220572557 CN 201220572557 CN 201220572557 U CN201220572557 U CN 201220572557U CN 202870337 U CN202870337 U CN 202870337U
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Abstract
The utility model provides a multi-layer optical conductor, a backlight module and a display device. The multi-layer optical conductor comprises a main layer, a prism layer and a hollow interlayer arranged between the main layer and the prism layer. The hollow interlayer can be an air layer or a vacuum layer. According to the technical scheme of the utility model, the hollow interlayer, instead of an intermediate base layer adopted in the prior art, is arranged between the main layer and the prism layer. Compared with the prior art, the difference between the refractive indexes of the layers of the multi-layer optical conductor is increased. The larger the difference between the refractive indexes of layers, the better the total reflection effect. Therefore, due to the adoption of the multi-layer optical conductor, the total reflection effect is improved, while both the light utilization rate and the light uniformity are improved. The rays of light on the surface of a product are also improved, so that the picture quality of the entire display device is facilitated to be improved. Meanwhile, the material cost is saved and the structure is simplified. Thus, the mass production is facilitated.
Description
Technical field
The utility model relates to the back light source technique field of liquid crystal display, relates in particular to a kind of multilayer light conductor, backlight source module and display device.
Background technology
In the demonstration of liquid crystal display, backlight source module is extremely important, and it is to be positioned at LCD a kind of light source behind, and its illumination effect directly has influence on the visual effect of LCD MODULE.At present, the backlight source module of liquid crystal display is divided into side-light type back light and direct-light-type backlight according to the difference of distribution of light sources position.Side-light type back light meets the slim requirement of current liquid crystal display, and can obtain highlighted, uniform planar light source, and nearly all notebook computer and various large-scale liquid crystal display are all at the backlight that uses this structure.As shown in Figure 1, traditional side-edge type backlight module is comprised of light source and many blooming pieces, these blooming pieces mainly comprise prismatic lens 200, diffusion sheet 100, light guide plate (Light Guide Panel, LGP) 300, reflector plate 400 etc., wherein, LGP300 is arranged at the side that LCD receives incident light, light source 500 is arranged at the side of LGP300, reflector plate 400 plays the effect of the utilization factor that improves light, prismatic lens 200 plays the effect that improves brightness, and diffusion sheet 100 and LGP300 play the effect of the optical homogeneity that improves backlight source module.
Along with the development of the ultrathin of liquid crystal display electron product, Secretary has been proposed also for the backlight thickness of liquid crystal display.Traditional backlight source module will reach high-performance, owing to used a large amount of blooming piece etc., diffusion sheet and prismatic lens must be set in addition on the light guide plate, so that backlight source module thickness is difficult to reduce.In order to address this problem the multilayer light conductor (MLL) that used newly developed in the present backlight source module.The structural representation that is present employed multilayer light conductor (MLL) shown in Figure 2.As shown in Figure 2, present multilayer light conductor comprises body layer 10, basic unit 90 and the layers of prisms 30 that sets gradually, wherein, body layer 10 away from the first surface 10a of layers of prisms and the equal indentation of second surface 30b away from body layer of layers of prisms 30, purpose is to convert original line source to area source, identical with the diffusion sheet role in the traditional backlight source module, play the equally distributed effect of light; First surface at body layer 10 also is coated with transparent minitype particle, to improve the refraction number of times of light, improves utilization factor and the uniformity of light of light.The multilayer light conductor of this structure is that the refractive index by between layers is different, utilizing emitted light is transferred to the surface of backlight by refraction.This multilayer light conductor can be used for backlight source module, does not need the blooming pieces such as diffusion sheet, reduce to a certain extent the thickness of backlight, but its illumination effect is further improved, to satisfy the visual effect requirement to LCD MODULE.
The utility model content
The display device that the purpose of this utility model has been to provide a kind of multilayer light conductor, has had the backlight source module of this multilayer light conductor and have this multilayer light conductor, simple in structure, improve utilization factor and the uniformity of light of light, in the purpose that reaches the product thickness attenuate, satisfy the requirement to the visual effect of LCD MODULE.
Technical scheme provided by the utility model is:
A kind of multilayer light conductor comprises body layer and layers of prisms; Be formed with refractive index between described body layer and the described layers of prisms less than the empty interlayer of the refractive index of described body layer and described layers of prisms.
Further, described empty interlayer is air layer or vacuum layer.
Further, the first surface indentation away from described layers of prisms of described body layer.
Further, the second surface indentation away from described body layer of described layers of prisms.
Further, the second surface of the close described layers of prisms of described body layer is provided with at least one cavity, forms described empty interlayer between the first surface of the close described body layer of described at least one cavity and described layers of prisms;
Perhaps, the first surface of the close described body layer of described layers of prisms is provided with at least one cavity, forms described empty interlayer between the second surface of the close described layers of prisms of described at least one cavity and described body layer.
Further, the inside of described cavity is provided with the supporter between described body layer and described layers of prisms.
Further, described supporter and described body layer or described layers of prisms are structure as a whole.
Further, be provided with transparent minitype particle in the described empty interlayer.
Further, described transparent minitype particle is coated the first surface of the close described body layer of the second surface of close described layers of prisms of described body layer and/or described layers of prisms.
Another purpose of the present utility model is to provide a kind of backlight source module, and it comprises light source and multilayer light conductor of the present utility model, and wherein, described multilayer light conductor is arranged at a side of described light source.
Also purpose of the present utility model is to provide a kind of display device, and it comprises backlight source module of the present utility model.
The beneficial effects of the utility model are:
Multilayer light conductor of the present utility model is by arranging the sky interlayer between body layer and layers of prisms, compare with the basic unit that between body layer and layers of prisms, arranges in the prior art, specific refractivity between layers strengthens, because refractive index between layers differs larger, it is better that the total reflection effect occurs, therefore, multilayer light conductor of the present utility model can improve light generation total reflection effect, improve utilization factor and the optical uniformity of light, improve the light of product surface, in attenuate, be conducive to improve the performance of whole display device product picture; And, save material cost, simple in structure, be conducive to a large amount of productions.
Obviously, the backlight source module that has a multilayer light conductor of the present utility model also has above-mentioned beneficial effect; Same, the display device with backlight source module of the present utility model also has above-mentioned beneficial effect.
Description of drawings
Fig. 1 represents the composition structural representation of the blooming piece in the backlight source module of the prior art;
Fig. 2 represents the structural representation of multilayer light conductor of the prior art;
Fig. 3 represents the structural representation of multilayer light conductor of the present utility model;
Fig. 4 represents the structural representation of backlight source module of the present utility model;
Fig. 5 represents one of light path synoptic diagram of backlight source module of the present utility model;
Fig. 6 represent backlight source module of the present utility model the light path synoptic diagram two;
Fig. 7 represent backlight source module of the present utility model the light path synoptic diagram three;
Fig. 8 represent backlight source module of the present utility model the light path synoptic diagram four.
Embodiment
Below in conjunction with accompanying drawing principle of the present utility model and feature are described, institute gives an actual example and only is used for explaining the utility model, is not be used to limiting scope of the present utility model.
The multilayer light conductor that the utility model provides comprises body layer 10 and layers of prisms 20, be provided with refractive index between body layer 10 and the layers of prisms 30 less than the empty interlayer 20 of the refractive index of body layer and layers of prisms, that is to say, the basic unit of multilayer light conductor of the prior art removed or basic unit is made empty, with between body layer 10 and layers of prisms 30, arrange in the prior art in the middle of basic unit compare, specific refractivity between layers strengthens, because refractive index between layers differs larger, it is better that the total reflection effect occurs, therefore, multilayer light conductor of the present utility model can improve light generation total reflection effect, improve utilization factor and the optical uniformity of light, improve the light of product surface, in attenuate, be conducive to improve the performance of whole display device product picture, and, also save material cost, simple in structure, be conducive to a large amount of productions.
Particularly, the empty interlayer 20 in the multilayer light conductor that provides in the present embodiment can be air layer or vacuum layer.Certainly, also can be to fill other gas mediums in this sky interlayer 20.
In the multilayer light conductor that provides in the present embodiment, the first surface 10a indentation away from layers of prisms 30 of body layer 10 can improve uniformity of light; The second surface 30b indentation away from body layer 10 of layers of prisms 30 can improve uniformity of light.Certainly, the first surface 10a of body layer 10 and the second surface 30b of layers of prisms 30 can also be designed to the concaveconvex structure of other versions, such as: by a plurality of hemispherical concaveconvex structures that consist of etc.
Wherein, cavity can be in using die main body layer 10 manufacture process, directly adopts mould to form, and also can be, forms first whole body layer 10 base materials, cuts out needed cavity on base material again.
What certainly can understand is, empty interlayer 20 also can be formed between body layer 10 and the layers of prisms 30 in the following manner: the first surface in layers of prisms 30 is established cavity, when body layer 10 was combined with each other with layers of prisms 30, the cavity on the first surface of layers of prisms 30 namely with between the second surface of body layer 10 cooperated the empty interlayer 20 of formation.
In addition, empty interlayer 20 can also be formed between body layer 10 and the layers of prisms 30 by following frame mode: between body layer 10 and layers of prisms 30 middle layer that a middle part has the frame-type of cavity is set, the cavity at middle part, middle layer namely forms empty interlayer 20.
Should be understood that, in actual applications, empty interlayer 20 can also adopt other modes to be formed between body layer 10 and the layers of prisms 30, such as: body layer 10 is fixing across a certain distance mutually with layers of prisms 30, has namely formed empty interlayer 20 between body layer 10 and layers of prisms 30; Enumerate no longer one by one at this.
Need to prove that the region area of cavity is preferably more than or equal to the viewing area area of backlight.
In addition, in the multilayer light conductor that provides in the present embodiment, be provided with the supporter 101 that is supported between body layer 10 and the layers of prisms 30 in the inside of the cavity on the second surface of body layer 10, to improve the supporting capacity of multilayer light conductor, so that the multilayer light conductor can not destroy because of the pressure in the external world.
In the multilayer light conductor that provides in the present embodiment, supporter 101 and the integrative-structure of body layer 10 for adopting same material to make.That is to say direct mould molding or directly cut formation at body layer 10 base materials when supporter 101 forms cavity at body layer 10.
Certainly, be understandable that in the present embodiment, when cavity is when being formed on the first surface of layers of prisms 30, supporter 101 also can be to adopt the material identical with layers of prisms 30 to make, and is structure as a whole with layers of prisms 30.
In the multilayer light conductor that provides in the present embodiment, as shown in Figure 3, empty interlayer 20 is interior can also to be provided with transparent minitype particle 40, after being conducive to the light reflection many times of sky interlayer 20 upper surfaces (being the cavity bottom surface of body layer 10) and lower surface (being the first surface of layers of prisms 30), transfer to again body layer 10, finally transfer to the surface of backlight, can further improve like this utilization factor of light, more can improve uniformity of light, be conducive to improve the performance of whole product drawing.
In the multilayer light conductor that provides in the present embodiment, as shown in Figure 3, transparent minitype particle 40 is coated on the upper surface and/or lower surface of sky interlayer 20, that is to say, transparent minitype particle 40 is coated the second surface of body layer 10 and/or the first surface of layers of prisms 30.
In addition, in the multilayer light conductor that provides in the present embodiment, also transparent minitype particle can be set at the first surface 10a of body layer 10, with further raising illumination effect.
Be illustrated in figure 4 as backlight source module provided by the utility model (part only is shown), it comprises multilayer light conductor of the present utility model, also comprise the light source 50 that is arranged at this multilayer light conductor one side, can also comprise the catoptron 60 that is arranged at this multilayer light conductor below.Light path principle in the backlight source module that below provides in the explanation present embodiment:
If the optical index of body layer 10 is n1, the optical index of empty interlayer 20 is n2, and the optical index of layers of prisms 30 is n3.As shown in Figure 4 and Figure 5, being arranged at the light that distributes according to different angles that the light source 50 of multilayer light conductor one side sends mainly is to enter into body layer 10, because the restriction that is reflected, refraction angle is α=arcsin (1/n1), establishes the incidence angle θ that body layer 10 is transferred to air layer or vacuum layer (empty interlayer 20) to be: pi/2-arcsin (1/n1) ≦ θ＜=pi/2; Light in body layer 10 and the incident angle that the best of total reflection can occur between air layer or the vacuum layer be θ 1, θ 1=arcsin (n1/n2).
As shown in Figure 5, when light is transferred to air layer or vacuum layer with incident angle θ＞θ 1, light is that total reflection occurs, that is to say that the light of incident angle θ＞θ 1 is reflected in body layer 10 fully, opposite, as angle of incidence of light degree θ＜θ 1, then light reflects simultaneously and reflects, and wherein reflection ray reflexes to body layer 10, and refracted ray enters in air layer or the vacuum layer.Thus, differ larger between n1 and the n2, the angle θ 1 that total reflection occurs is less, and the easier generation total reflection of light and transfer to the first surface of body layer 10 finally transfers to the surface of backlight.As shown in Figure 6 and Figure 7, reflection ray reflexes in the body layer 10, and can transmit from the side direction opposite side of body layer 10 near light source 50 in the mode that incident angle θ reduces gradually, in case the incident angle θ＜θ 1 of light, light also can reflect and enter into air layer or vacuum layer.
As shown in Figure 7 and Figure 8, after light transfers to layers of prisms 30 by air layer or vacuum layer, because the specific refractivity of layers of prisms 30 and air layer or vacuum layer, be reflected back body layer 10 by the most of light that enters layers of prisms 30 after body layer 10, air layer or the vacuum layer by the second surface 30b of the indentation of layers of prisms 30, directly be transferred to the surface of backlight, one small part light can not be reflected by the second surface 30b of layers of prisms 30, and hit reflector plate 60 after passing layers of prisms 30, reflex to again the surface of body layer 10 by reflector plate 60, reduce the loss of light.
As shown in Figure 8, the transparent minitype particle 40 of air layer or vacuum layer can improve the reflection of light number of times, thereby improves utilization factor and the homogeneity of light.
Thus, backlight source module of the present utility model adopts multilayer light conductor of the present utility model obviously to improve utilization factor and the uniformity of light of light, improve brightness, thereby good multilayer light conductor can replace the light diaphragms such as diffusion sheet to realize only adopting an optical uniformity, realize the purpose of attenuate, guarantee picture effect.
The above is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (11)
1. a multilayer light conductor comprises body layer and layers of prisms; It is characterized in that,
Be formed with refractive index between described body layer and the described layers of prisms less than the empty interlayer of the refractive index of described body layer and described layers of prisms.
2. multilayer light conductor according to claim 1 is characterized in that, described empty interlayer is air layer or vacuum layer.
3. multilayer according to claim 2 road light body is characterized in that the first surface indentation away from described layers of prisms of described body layer.
4. multilayer light conductor according to claim 2 is characterized in that, the second surface indentation away from described body layer of described layers of prisms.
5. multilayer light conductor according to claim 2, it is characterized in that, the second surface of the close described layers of prisms of described body layer is provided with at least one cavity, and described at least one cavity and described layers of prisms are near forming described empty interlayer between the first surface of described body layer;
Perhaps, the first surface of the close described body layer of described layers of prisms is provided with at least one cavity, forms described empty interlayer between the second surface of the close described layers of prisms of described at least one cavity and described body layer.
6. multilayer light conductor according to claim 5 is characterized in that, the inside of described cavity is provided with the supporter between described body layer and described layers of prisms.
7. multilayer light conductor according to claim 6 is characterized in that, described supporter and described body layer or described layers of prisms are structure as a whole.
8. multilayer light conductor according to claim 1 is characterized in that, is provided with transparent minitype particle in the described empty interlayer.
9. multilayer light conductor according to claim 8 is characterized in that, described transparent minitype particle is coated the first surface of the close described body layer of the second surface of close described layers of prisms of described body layer and/or described layers of prisms.
10. a backlight source module comprises light source, it is characterized in that, also comprise be arranged at described light source one side such as each described multilayer light conductor of claim 1 to 9.
11. a display device is characterized in that, comprises backlight source module as claimed in claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201220572557 CN202870337U (en) | 2012-11-01 | 2012-11-01 | Multi-layer optical conductor, backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220572557 CN202870337U (en) | 2012-11-01 | 2012-11-01 | Multi-layer optical conductor, backlight module and display device |
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| CN202870337U true CN202870337U (en) | 2013-04-10 |
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| CN 201220572557 Expired - Lifetime CN202870337U (en) | 2012-11-01 | 2012-11-01 | Multi-layer optical conductor, backlight module and display device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472523A (en) * | 2013-04-30 | 2013-12-25 | 瑞仪光电股份有限公司 | Light guide device and backlight module with same |
| CN103499899A (en) * | 2013-10-08 | 2014-01-08 | 潘磊 | Liquid crystal display device with multiple layers of backlight |
| CN104566041A (en) * | 2015-01-20 | 2015-04-29 | 深圳市德仓科技有限公司 | Backlight module, liquid crystal module and terminal |
| CN105137524A (en) * | 2015-06-10 | 2015-12-09 | 深圳市华星光电技术有限公司 | Liquid crystal display device and light guide plate thereof |
| CN105511164A (en) * | 2016-02-03 | 2016-04-20 | 京东方科技集团股份有限公司 | Backlight module and fabrication method thereof and display device |
| CN106773210A (en) * | 2016-12-28 | 2017-05-31 | 深圳市华星光电技术有限公司 | Display module |
| CN108459439A (en) * | 2018-05-16 | 2018-08-28 | 京东方科技集团股份有限公司 | Backlight module and liquid crystal display device |
-
2012
- 2012-11-01 CN CN 201220572557 patent/CN202870337U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472523A (en) * | 2013-04-30 | 2013-12-25 | 瑞仪光电股份有限公司 | Light guide device and backlight module with same |
| CN103472523B (en) * | 2013-04-30 | 2016-06-08 | 瑞仪光电股份有限公司 | Light guide device and backlight module with same |
| CN103499899A (en) * | 2013-10-08 | 2014-01-08 | 潘磊 | Liquid crystal display device with multiple layers of backlight |
| CN103499899B (en) * | 2013-10-08 | 2016-01-13 | 潘磊 | A kind of liquid crystal indicator with multilayer backlight |
| CN104566041A (en) * | 2015-01-20 | 2015-04-29 | 深圳市德仓科技有限公司 | Backlight module, liquid crystal module and terminal |
| CN105137524A (en) * | 2015-06-10 | 2015-12-09 | 深圳市华星光电技术有限公司 | Liquid crystal display device and light guide plate thereof |
| WO2016197407A1 (en) * | 2015-06-10 | 2016-12-15 | 深圳市华星光电技术有限公司 | Backlight module and light guide plate thereof |
| CN105137524B (en) * | 2015-06-10 | 2017-12-29 | 深圳市华星光电技术有限公司 | Liquid crystal display device and its light guide plate |
| CN105511164A (en) * | 2016-02-03 | 2016-04-20 | 京东方科技集团股份有限公司 | Backlight module and fabrication method thereof and display device |
| CN106773210A (en) * | 2016-12-28 | 2017-05-31 | 深圳市华星光电技术有限公司 | Display module |
| CN108459439A (en) * | 2018-05-16 | 2018-08-28 | 京东方科技集团股份有限公司 | Backlight module and liquid crystal display device |
| CN108459439B (en) * | 2018-05-16 | 2023-11-17 | 京东方科技集团股份有限公司 | Backlight module and liquid crystal display device |
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| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20130410 |