CN102748677A - Backlight module - Google Patents
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- CN102748677A CN102748677A CN2012102316103A CN201210231610A CN102748677A CN 102748677 A CN102748677 A CN 102748677A CN 2012102316103 A CN2012102316103 A CN 2012102316103A CN 201210231610 A CN201210231610 A CN 201210231610A CN 102748677 A CN102748677 A CN 102748677A
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Abstract
The invention relates to a backlight module, which comprises a first light guide plate and a second light guide plate which are overlapped with each other. The first light guide plate comprises a first plate body, a first extension part and a first light source, wherein the first plate body is provided with a first inner surface and a first outer surface which are opposite to each other, and the first inner surface faces to the second light guide plate; the first extension part is arranged on the edge of the first inner surface and extends to one side surface of the second light guide plate along with the direction from the first plate body to the second light guide plate, the first extension part and the first plate body jointly form a first light incidence surface, the first extension part is additionally provided with a first reflection surface and the first reflection surface is at least connected with one of the first incidence surface and the first inner surface; and the first light source is arranged on one side of the first light incidence surface and projects light rays towards the first light incidence surface, and the first reflection surface guides the light rays of the first light source to the first outer surface. The backlight module can effectively receive light emitted by a light-emitting surface with large light-emitting area.
Description
The application is 201110122488.1 for application number, and the applying date is on May 12nd, 2011, and denomination of invention is divided an application for the application of " backlight module ".
Technical field
The present invention relates to a kind of backlight module, relate in particular to the structure of this backlight module.
Background technology
Backlight module is broadly divided into " side-light type " according to light source position and reaches " straight-down negative " design; Wherein the backlight module of " side-light type " design be with light source for example light emitting diode (LED) be arranged on the LGP side; Utilize LGP control light beam direct of travel again, so that even area source to be provided.
Along with the demand and the restriction of modern trend, many luminous product towards short and small frivolous outside type development, make the also slimming gradually of LGP of the backlight module that luminous product is interior, dwindle the thickness of LGP; Even the area of the incidence surface of LGP side causes the incidence surface of LGP can't effectively receive whole bright dippings of light source also less than effective lighting area of light source (like light emitting diode) on the contrary, and then the light extraction efficiency of the LGP of decaying.
So; How to develop a kind of backlight module, can effectively improve above-mentioned disappearance of bringing and inconvenience, and then keep the original light extraction efficiency of LGP; Can avoid the thickness of LGP unlikely excessive again, be one of the very urgent important topic that those skilled in the art need consider at present.
Summary of the invention
The technical issues that need to address of the present invention have provided a kind of backlight module, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention realizes through following technical scheme:
The present invention includes: one first LGP that stacks each other and one second LGP; This first LGP comprises: one first plate body; Described first plate body one of has relatively first inner surface and one first outer surface, and this first inner surface is in the face of this second LGP; One first extension; Described first extending part is in the edge of this first inner surface; And this first plate body extends a side of this second LGP towards the direction of this second LGP certainly; This first extension and this first plate body constitute continuous first incidence surface altogether; This first extension is tool one first reflecting surface also, and this first reflecting surface connects this first incidence surface and this first inner surface; And one the 3rd reflecting surface; Described the 3rd reflecting surface is positioned at this first plate body away from one of this first incidence surface side; This second LGP comprises: one second plate body; Described second plate body one of has relatively second inner surface and one second outer surface, and this second inner surface is in the face of this first inner surface; One second extension; Described second extending part is in the edge of this second inner surface away from this first extension; And this second plate body extends this first LGP away from one of this first incidence surface side towards the direction of this first LGP certainly; This second extension and this second plate body constitute continuous second incidence surface altogether; This second extension is tool one second reflecting surface also; This second reflecting surface is faced the 3rd reflecting surface, and connects this second incidence surface and this second inner surface, the external form of external form coupling the 3rd reflecting surface of this second reflecting surface; And one the 4th reflecting surface; Described the 4th reflecting surface is positioned at this second plate body away from one of this second incidence surface side, and in the face of this first reflecting surface, the external form of this first reflecting surface of the external form of the 4th reflecting surface coupling; One first light source; Described first light source is positioned at a side of this first incidence surface, and towards this first incidence surface throw light; The light of this this first light source of first reflecting surface guiding is to this first outer surface; And a secondary light source, this secondary light source is positioned at one of this second incidence surface side, and towards this second incidence surface throw light.
Compared with prior art, the invention has the beneficial effects as follows: the incidence surface of LGP can receive the light-emitting area of big light-emitting area effectively; The two-way light source of display with double faces is provided; The light source of a plurality of different directions or different colours of also can arranging in pairs or groups is so that evenly mix out the light of expection color.
Description of drawings
Fig. 1 illustrates the side view of one of backlight module of the present invention first embodiment.
Fig. 2 illustrates the side view of one of backlight module of the present invention second embodiment.
Fig. 3 A illustrates the side view of second embodiment of backlight module of the present invention according to a unidirectional bright dipping design.
Fig. 3 B illustrates the side view of one of Fig. 3 A variation.
Fig. 3 C illustrates the side view of the another variation of Fig. 3 B.
Fig. 4 A illustrates the side view of second embodiment of backlight module of the present invention according to a two-way bright dipping design.
Fig. 4 B illustrates the side view of one of Fig. 4 A variation.
Fig. 5 A illustrates the side view of one of backlight module of the present invention the 3rd embodiment.
Fig. 5 B illustrates the vertical view of the 3rd embodiment of backlight module of the present invention.
Fig. 6 A illustrates the side view of the 3rd embodiment of backlight module of the present invention according to a unidirectional bright dipping design.
Fig. 6 B illustrates the side view of one of Fig. 6 A variation.
Fig. 6 C illustrates the side view of the another variation of Fig. 6 B.
Fig. 7 A illustrates the side view of the 3rd embodiment of backlight module of the present invention according to a two-way bright dipping design.
Fig. 7 B illustrates the side view of one of Fig. 7 A variation.
Fig. 8 illustrates the side view of one of backlight module of the present invention the 4th embodiment.
Fig. 9 (a) illustrates the side view of backlight module of the present invention to the change in shape of each reflecting surface to Fig. 9 (f).
Figure 10 illustrates the side view of one of each embodiment of backlight module of the present invention variation.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described in further detail:
The present invention is for disclosing a kind of backlight module; After coinciding at two thin type LGPs; The incidence surface of these a little LGPs strengthens these a little LGPs incidence surface area separately, but need not increase the thickness of these a little LGPs own, so that can receive the light-emitting area of big light-emitting area effectively.
The present invention is for disclosing a kind of backlight module, in order to the light source of different directions to be provided, to provide display with double faces two-way light source.
The present invention is for disclosing a kind of backlight module, in order to the light source of arrange in pairs or groups a plurality of different directions or different colours, so that evenly mix out the light of expection color.
One of the present invention embodiment provides a kind of backlight module.Backlight module comprises and one of stacks first LGP and one second LGP and one first light source mutually.First LGP comprises one first plate body and one first extension.First plate body one of has relatively first inner surface and one first outer surface, and first inner surface is in the face of second LGP.First extending part is in the edge of first inner surface, and the direction towards second LGP extends one of second LGP side from first plate body, and in the face of this side.First extension and first plate body constitute one first incidence surface altogether.First extension has more one first reflecting surface, and first reflecting surface connects first incidence surface and first inner surface.First light source is positioned at one of first incidence surface side, and towards the first incidence surface throw light, makes the reflecting surface of winning guide light to the first outer surface of first light source.
The present invention provides a kind of backlight module.Backlight module comprises two LGPs and two light sources that coincide mutually.This two LGP coincides each other, and to the incidence surface throw light of LGP, the area of each incidence surface of LGP is greater than the sectional area of arbitrary section of its LGP, and the area of each incidence surface of LGP is more than or equal to the light-emitting area of each corresponding light source respectively for these a little light sources.So, the incidence surface of these a little LGPs just can receive the light-emitting area of big light-emitting area effectively.
See also shown in the 1st figure.The 1st figure illustrates the side view of one of backlight module 10 of the present invention first embodiment.
The backlight module 10 that the present invention's first embodiment is provided.Backlight module 10 comprises one first LGP 100 and one second LGP 400, one first light source LS1 and a secondary light source LS2.First LGP 100 roughly is " L " font, comprises one first plate body 110 and one first extension 120.First plate body 110 has relative first inner surface 111 and first outer surface 112; And around the side (as shown in the figure) of its first inner surface 111 and first outer surface 112; Wherein the area of arbitrary side is all less than the area of first inner surface 111 and first outer surface 112, and arbitrary side is all perpendicular with first outer surface 112.First extension 120 extends outwardly from the edge of first inner surface 111.First extension 120 and first plate body 110 constitute continuous first incidence surface 122 altogether.First extension 120 has more one first reflecting surface, 121, the first reflectings surface 121 and connects first incidence surface 122 and first inner surface 111.
Second LGP 400 roughly is " L " font, comprises one second plate body 410 and one second extension 420.Second plate body 410 has relative second inner surface 411 and second outer surface 412; And around the side (as shown in the figure) of its second inner surface 411 and second outer surface 412; Wherein the area of arbitrary side is all less than the area of second inner surface 411 and second outer surface 412, and arbitrary side is all perpendicular with second outer surface 412.Second extension 420 extends outwardly from the edge of second inner surface 411.Second extension 420 and second plate body 410 constitute continuous second incidence surface 422 altogether.Second extension 420 has more one second reflecting surface, 421, the second reflectings surface 421 and connects second incidence surface 422 and second inner surface 411.
First LGP 100 and second LGP 400 coincide each other; Make second inner surface 411 of first inner surface, 111 joints, second plate body 410 of the plate body 110 of winning; And first extension 120 and second extension 420 each other away from; Otherwise and extend towards the two-phase direction respectively, it is other to make the extension 120 of winning be in that one of second plate body 410 is other, second extension 420 is in one of first plate body 110.For instance, through the adhesion layer (not shown), first inner surface 111 of first plate body 110 is incorporated on second inner surface 411 of second plate body 410 regularly.
Specifically; After second inner surface 411 of first LGP 100 through first inner surface 111 and second LGP 400 coincides each other; First extension 120 of first LGP 100 extends towards the direction of second plate body 410 (promptly towards direction D1) from first plate body 110; The extension 120 of winning is extended by second side of LGP 400 away from second incidence surface 422; And first reflecting surface, 121 contiguous second LGPs 400 of first extension 120 are away from the side of second incidence surface 422, and meaning is that first extension 120 and second plate body 410 are in par; Simultaneously; Second extension 420 of second LGP 400 extends towards the direction of first plate body 110 (promptly towards direction D2) from second plate body 410; Make second extension 420 extend by first side of LGP 100, and second reflecting surface, 421 contiguous first LGPs 100 of second extension 420 are away from the side of first incidence surface 122 away from first incidence surface 122.In addition, the concrete external form kind of first reflecting surface 121 and second reflecting surface 421 will be described in back (like the 9th figure).
The first light source LS1 is positioned at one of first incidence surface 122 side, in order to towards first incidence surface, 122 throw light L11, the light L11 of the light source LS1 that wins can be got in first plate body 110 from first incidence surface 122.In addition, the part light L11 of the first light source LS1 can be through the reflection of first reflecting surface 121 in first plate body 110, and makes light towards 112 outputs of first outer surface, to increase the luminosity of first plate body 110.The first light source LS1 for example is LED lamp bar (LED light bar), comprises a plurality of LED assemblies, and each LED assembly all has certain lighting area.
Secondary light source LS2 is positioned at one of second incidence surface 422 side, in order to towards second incidence surface, 422 throw light L21, makes the light L21 of secondary light source LS2 to get in second plate body 410 from second incidence surface 422.In addition, the part light L21 of secondary light source LS2 can be through the reflection of second reflecting surface 421 in second plate body 410, and makes light towards 412 outputs of second outer surface, to increase the luminosity of second plate body 410.Secondary light source LS2 for example is LED lamp bar (LED light bar), comprises a plurality of LED assemblies, and each LED assembly all has certain lighting area.
Because first LGP 100 and second LGP 400 coincide each other, and the direction of first incidence surface 122 and second incidence surface 422 each other back to, make win light source LS1 and secondary light source LS2 have the light emission direction of facing each other.
So, because the area of first incidence surface 122 is more than or equal to total lighting area of the first light source LS1, first incidence surface 122 just can be accepted total amount of light of the first light source LS1 of major part effectively.Because the area of second incidence surface 422 is more than or equal to total lighting area of secondary light source LS2, second incidence surface 422 just can be accepted total amount of light of the secondary light source LS2 of major part effectively.
Add; Though the area of first incidence surface 122 is greater than the sectional area of 110 arbitrary sections of first plate bodys; And the area of second incidence surface 422 is greater than the sectional area of 410 arbitrary sections of second plate bodys; When first LGP 100 with after second LGP 400 coincides mutually; And first extension 120 and second extension 420 oppositely are disposed at one of second LGP 400 and first LGP 100 side each other, and first LGP 100 can not increase with the gross thickness that second LGP 400 coincides mutually, still can realize the slimming development of backlight module 10.
See also shown in the 2nd figure.The 2nd figure illustrates the side view of one of backlight module 11 of the present invention second embodiment.
Under the basis according to first embodiment the 1st figure, first LGP 200 of the backlight module 11 of second embodiment more comprises one the 3rd reflecting surface 213 except having first plate body 210 and one first extension 220.The 3rd reflecting surface 213 is positioned at first plate body 210 away from one of first incidence surface 222 side, and contiguous second reflecting surface 521, even second reflecting surface 521 of fitting.Likewise, second LGP 500 more comprises one the 4th reflecting surface 513 except having second plate body 510 and one second extension 520.The 4th reflecting surface 513 is positioned at second plate body 510 away from one of second incidence surface 522 side, and contiguous first reflecting surface 221, even first reflecting surface 221 of fitting.
So; The light L12 of the first light source LS1 is via the guiding of first plate body 210 after arriving the 3rd reflecting surface 213; Can be reflected and court's first outer surface, 212 outputs by the 3rd reflecting surface 213; Unlikelyly overflow away from one of first incidence surface 222 side, cause the waste of invalid light by first plate body 210; Same; The light L22 of secondary light source LS2 is via the guiding of second plate body 510 after arriving the 4th reflecting surface 513; Can be reflected and court's second outer surface, 512 outputs by the 4th reflecting surface 513; Unlikelyly overflow away from one of second incidence surface 522 side, cause the waste of invalid light by second plate body 510.
In addition, type is not limit and must be mated type outside second reflecting surface 521 outside the 3rd reflecting surface 213, and type is not limit and must be mated type outside first reflecting surface 221 outside the 4th reflecting surface 513.But, after the concrete external form kind of each reflecting surface will be described in.
Yet; When type outside the 3rd reflecting surface 213 matees type outside second reflecting surface 521; And when type matees type outside first reflecting surface 221 (the 2nd figure) outside the 4th reflecting surface 513; The 3rd reflecting surface 213 and second reflecting surface 521 fit, and the 4th reflecting surface 513 and first reflecting surface 221 fit, and then can help second LGP 500 firmly to combine with first LGP 200 is.
First embodiment of backlight module 10,11 of the present invention and second embodiment all can carry out towards unidirectional bright dipping design or two-way bright dipping design; Be about to reflector plate and be located at one of first LGP 100,200 or second LGP 400,500 outer surface (unidirectional bright dipping design), or with reflector plate be located at first LGP 100,200 and second LGP 400, between 500 (two-way bright dipping design).
Below be the embodiment that example proposes unidirectional bright dipping design and two-way bright dipping design with the backlight module 11 of second embodiment; Be not limited only to the implementation of second embodiment, unidirectional bright dipping design also can be practiced on the backlight module 10 of above-mentioned first embodiment with the embodiment of two-way bright dipping design.
See also shown in the 3A figure.3A figure illustrates the side view of second embodiment of backlight module 11 of the present invention according to a unidirectional bright dipping design.Change according to one of second embodiment; Backlight module 11 can be unidirectional (direction D1) bright dipping; Backlight module 11 more comprises second outer surface 512 (figure does not show) of first outer surface 212 that one first reflector plate, 430, the first reflector plates 430 are arranged at first plate body 210 (like 3A figure) or second plate body 510.So; The light L13 of the first light source LS1 can be reflected by first reflector plate 430 and guide to second plate body 510; Wherein light L13 can be reflected and guides to first reflector plate 430 by first reflecting surface 221, is reflected by first reflector plate 430 and guides to second plate body 510.Likewise, the light L23 of secondary light source LS2 can be reflected and gets back in second plate body 510 by first reflector plate 430.
See also shown in the 3B figure.3B figure illustrates the side view of one of 3A figure variation.Under the basis according to second embodiment 3A figure, second LGP 500 more comprises second outer surface 512 that one second fluorescence coating, 431, the second fluorescence coatings 431 are arranged at second plate body 510.The first light source LS1 has the first identical coloured light C1 with secondary light source LS2.So, the first coloured light C1 of the first light source LS1 and secondary light source LS2 can transfer to second fluorescence coating 431 through second LGP 500.Second fluorescence coating 431 receives exciting of the first coloured light C1 and sends the second coloured light C2, and the first coloured light C1 and the second coloured light C2 mixed light are the 3rd coloured light C3.
For example, the first coloured light C1 that is sent as the first light source LS1 and secondary light source LS2 (employing blue-ray LED) is a blue light, and second fluorescence coating 431 adopts the gold-tinted fluorescence coatings, makes that the second coloured light C2 is a gold-tinted so that mixed light and the 3rd coloured light C3 become white light.Lift another example; The first coloured light C1 that is sent as the first light source LS1 and secondary light source LS2 (employing blue-ray LED) is a blue light; Second fluorescence coating 431 mixes the fluorescence coating that gets for red fluorescence powder, green emitting phosphor; Make that the second coloured light C2 is red green mixed light, make mixed light and the 3rd coloured light become white light C3.
See also shown in the 3C figure.3C figure illustrates the side view of the another variation of 3B figure.Under the basis according to first embodiment 3B figure, first LGP 200 more comprises first inner surface 211 that one first fluorescence coating, 441, the first fluorescence coatings 441 are arranged at first plate body 210.The first light source LS1 and secondary light source LS2 have first coloured light C1 inequality and the 4th coloured light C4.So, the first coloured light C1 of the first light source LS1 can send the second coloured light C2 through exciting of first fluorescence coating 441, and the first coloured light C1 and the second coloured light C2 mixed light are the 3rd coloured light C3.The 4th coloured light C4 of secondary light source LS2 can send multicolored light C5 through exciting of second fluorescence coating 431.Getting into the 3rd coloured light C3 of second plate body 510 and the 4th coloured light C4 mixed light of secondary light source LS2 is the 6th coloured light C6.The 6th coloured light C6 and multicolored light C5 mixed light in second fluorescence coating 431 are seven-colour-light C7, so, cooperate the light of the first light source LS1 and secondary light source LS2 finally can export seven-colour-light C7 from second fluorescence coating 431.
So; Carry out the light that mixed light possibly can't effectively be mixed into the expection color compared to the fluorescent material of multiple coloured light in the single LGP of prior art; The 3rd coloured light to the second LGP of expection color can be provided, so that multicolored light and the 6th coloured light effectively are mixed into the seven-colour-light of expection color in the variation of this embodiment in first LGP.
Make a general survey of the variation of above-mentioned 3B figure, 3C figure, the LED assembly of the first light source LS1 and secondary light source LS2 can be the light emitting diode that does not contain fluorescent material, just, only utilizes the characteristic of light-emitting diode chip for backlight unit to send primitive color light.Because the processing procedure of light-emitting diode chip for backlight unit can be by control stably, so the primitive color light that the light-emitting diode chip for backlight unit of the first light source LS1 and secondary light source LS2 is sent each other comes down to uniformly.
See also shown in the 4A figure.4A figure illustrates the side view of second embodiment of backlight module 11 of the present invention according to a two-way bright dipping design.According to the variation again of second embodiment, bright dipping that backlight module 11 can be two-way (direction D1 and D2), backlight module 11 more comprises one second reflector plate 440.Second reflector plate 440 is arranged between first plate body 210 and second plate body 510.So, the light L14 of the first light source LS 1 can be reflected by second reflector plate 440 and guide to first outer surface 212; The light L24 of secondary light source LS2 can be reflected and guides to second outer surface 512 by second reflector plate 440, to provide two-way luminous.
See also shown in the 4B figure.4B figure illustrates the side view of one of 4A figure variation.First outer surface 212 of first plate body 210 of first LGP 200 more comprises one first fluorescence coating 442.Second outer surface 512 of second plate body 510 of second LGP 500 more comprises one second fluorescence coating 432.So, the first coloured light C1 of the first light source LS1 can transfer to first fluorescence coating 442 through first LGP 200.First fluorescence coating 442 receives exciting of the first coloured light C1 and sends the second coloured light C2, and the first coloured light C1 and the second coloured light C2 mixed light are the 3rd coloured light C3.Likewise, the 4th coloured light C4 of secondary light source LS2 can transfer to second fluorescence coating 431 through second LGP 500.Second fluorescence coating 432 receives exciting of the 4th coloured light C4 and sends multicolored light C5, and the 4th coloured light C4 and multicolored light C5 mixed light are the 6th coloured light C6.In addition, the first coloured light C1 of the first light source LS1 does not limit whether have identical color with the second coloured light C2 of secondary light source LS2.
Make a general survey of the variation of above-mentioned 4B figure, the LED assembly of the first light source LS1 and secondary light source LS2 can be the light emitting diode that does not contain fluorescent material, that is, only utilize the characteristic of light-emitting diode chip for backlight unit to send primitive color light.Because the processing procedure of light-emitting diode chip for backlight unit can be by control stably, so the primitive color light that the light-emitting diode chip for backlight unit of the first light source LS1 and secondary light source LS2 is sent each other comes down to uniformly.
According to other variation of above-mentioned first embodiment or second embodiment, one of them all selectively disposes a micro structured pattern (not illustrating) at least for first inner surface 111,211, second inner surface 411,511, first outer surface 112,212 and second outer surface 412,512.Micro structured pattern comprises a plurality of optical microstructures, can according to suitable arrangement mode (like density, position) be distributed in first inner surface 111,211, second inner surface 411,511, first outer surface 112,212 and second outer surface 412,512 at least one of them.For instance, the distribution density of optical microstructures is along with increasing away from light source.Yet the distribution density of optical microstructures, distribution mode can be decided with design demand, also can adopt regular distribution or random distribution, do not limit at this.
Lift another example; Plan with unidirectional (direction D1) bright dipping; First inner surface 111,211 or first outer surface, 112,212 configurable suitable micro structured pattern; Make the LGP 100,200 of winning to export the more bright dipping of high light-emitting efficiency towards second LGP 400,500; Simultaneously, second inner surface 411,511 or second outer surface, 412,512 configurable suitable micro structured pattern make second outer surface 412,512 of second LGP 400,500 that the more evenly bright dipping of (like atomizing effect) is provided.
Configuration mode about micro structured pattern; These a little optical microstructures can in be embedded in first inner surface 111,211, second inner surface 411,511, first outer surface 112,212 and second outer surface 412,512 at least in one of them, perhaps can solid be convexly equipped with first inner surface 111,211, second inner surface 411,511, first outer surface 112,212 and second outer surface 412,512 at least on one of them.
About the section shape of optical microstructures, these a little optical microstructures can for example be circle, square, rectangle, rhombus, smart circle, triangle, waveform or the like.
In addition, among first embodiment or second embodiment, first LGP 100,200 of above-mentioned backlight module 10,11 and second LGP the 400, the 500th, the combination that can have fluorescence coating and micro structured pattern simultaneously.
See also shown in 5A figure, the 5B figure.5A figure illustrates the side view of one of backlight module 12 of the present invention the 3rd embodiment.5B figure illustrates the vertical view of the 3rd embodiment of backlight module 12 of the present invention.
The backlight module 12 that the present invention's the 3rd embodiment is provided comprises one first LGP 300 and one second LGP 600, one first light source LS1, a secondary light source LS2 and one the 3rd light source LS3.First LGP 300 roughly is " U " font, comprises one first plate body 310, one first extension 320 and one the 3rd extension 330.First plate body 310 has relative first inner surface 311 and first outer surface 312; And around the side of its first inner surface 311 and first outer surface 312; Wherein the area of arbitrary side is all less than the area of first inner surface 311 and first outer surface 312, and arbitrary side is all perpendicular with first outer surface 312.
Specifically, after first LGP 300 and second LGP 600 coincided each other, trapezoidal plate body 610 was combined on first inner surface 311 of first plate body 310 by the 3rd inner surface 611, and between first extension 320 and one the 3rd extension 330.First extension 320 of first LGP 300 extends towards the direction of trapezoidal plate body 610 (promptly towards direction D1) from first plate body 310; Wherein one the 6th reflecting surface 613 is other to make the extension 320 of winning be positioned at second LGP 600; And this 6th reflecting surface 613 of first reflecting surface, 321 contiguous second LGPs 600 of first extension 320; And in the face of this 6th reflecting surface 613, meaning i.e. first extension 320 is in par with trapezoidal plate body 610; Simultaneously; The 3rd extension 330 of first LGP 300 extends towards the direction of trapezoidal plate body 610 (promptly towards direction D1) from first plate body 310; It is other to make that the 3rd extension 330 is positioned at second LGP, 600 another the 6th reflectings surface 613; And this another the 6th reflecting surface 613 of contiguous second LGPs 600 of the 5th reflecting surface 331 of the 3rd extension 330 and in the face of this another the 6th reflecting surface 613, meaning i.e. the 3rd extension 330 is in par with trapezoidal plate body 610.
In addition, type is not limit and must be mated type outside the 6th reflecting surface 613 outside first reflecting surface 321, and type is not limit and must be mated type outside the 6th reflecting surface 613 outside the 5th reflecting surface 331.First reflecting surface 321, the 5th reflecting surface 331 will be after the concrete external form kind of 2 the 6th reflectings surface 613 will be described in therewith.
Yet; When type outside first reflecting surface 321 and the 5th reflecting surface 331 matees outside the 6th reflecting surface 613 type; First reflecting surface 321 fits with one of which the 6th reflecting surface 613; And the 5th reflecting surface 331 fits with another the 6th reflecting surface 613, then can help second LGP 600 firmly to combine with first LGP 300 is.
The first light source LS1 is positioned at one of first incidence surface 322 side, in order to towards first incidence surface, 322 throw light L15, the light L15 of the light source LS1 that wins can be got in first plate body 310 from first incidence surface 322.In addition, the part light L15 of the first light source LS1 can be through the reflection of first reflecting surface 321 in first plate body 310, and from 312 outputs of first outer surface, to increase the luminosity of first plate body 310.The first light source LS1 for example is LED lamp bar (LED light bar), comprises a plurality of LED assemblies, and each LED assembly all has certain lighting area.
The 3rd light source LS3 is positioned at one of the 3rd incidence surface 332 side, in order to towards the 3rd incidence surface 332 throw light L31, makes the light L31 of the 3rd light source LS3 to get in first plate body 310 from the 3rd incidence surface 332.In addition, the part light L31 of the 3rd light source LS3 can be through the reflection of the 5th reflecting surface 331 in first plate body 310, and is directed to first plate body 310, and from 312 outputs of first outer surface, to increase the luminosity of first outer surface 312.The 3rd light source LS3 for example is LED lamp bar (LEDlight bar), comprises a plurality of LED assemblies, and each LED assembly all has certain lighting area.
Since the direction of first incidence surface 322 and the 3rd incidence surface 332 each other back to, make win light source LS1 and the 3rd light source LS3 position locate identical plane, and the first light source LS1 and the 3rd light source LS3 have the light emission direction of facing each other.
Secondary light source LS2 is positioned at wherein one of one second incidence surface 622 side of trapezoidal plate body 610 at least; In order to towards this second incidence surface 622 throw light L25; Make the light L25 of secondary light source LS2 can get into second incidence surface 622; And the light L25 of secondary light source LS2 is directed in the trapezoidal plate body 610, and from 612 outputs of the 3rd outer surface.In addition, the part light L25 of secondary light source LS2 can be through the reflection of the 6th reflecting surface 613 in trapezoidal plate body 610, and is directed to trapezoidal plate body 610, and from 612 outputs of the 3rd outer surface, to increase the luminosity of the 3rd outer surface 612.Secondary light source LS2 for example is LED lamp bar (LED light bar), comprises a plurality of LED assemblies, and each LED assembly all has certain lighting area.
When first LGP 300 and second LGP 600 coincide each other; The direction of first incidence surface 322 (or the 3rd incidence surface 332) and second incidence surface 622 not each other back to; Make the light source LS1 that wins (or the 3rd light source LS3) not locate identical plane in the position, and the first light source LS1 (or the 3rd light source LS3) have interlaced light emission direction with secondary light source LS2 with secondary light source LS2.
So, because the area of first incidence surface 322 is more than or equal to total lighting area of the first light source LS1, first incidence surface 322 just can be accepted total amount of light of the first light source LS1 of major part effectively.Because the area of the 3rd incidence surface 332 is more than or equal to total lighting area of the 3rd light source LS3, the 3rd incidence surface 332 just can be accepted total amount of light of the 3rd light source LS3 of major part effectively.
Though the area of first incidence surface 322 and the 3rd incidence surface 332 is greater than the sectional area of 310 arbitrary sections of first plate bodys; When first LGP 300 with after second LGP 600 coincides mutually; Second LGP 600 is at first inner surface 311 and between first extension 320 and one the 3rd extension 330; And first reflecting surface 321 of first LGP 300 and the 3rd reflecting surface 331 fit with the 6th reflecting surface 613 of second LGP 600 respectively; First LGP 300 can not increase with the gross thickness that second LGP 600 coincides mutually, still can realize the slimming development of backlight module 12.
See also shown in the 6A figure.6A figure illustrates the side view of the 3rd embodiment of backlight module 12 of the present invention according to a unidirectional bright dipping design.
Change according to one of the 3rd embodiment, backlight module 12 can be unidirectional (direction D1) bright dipping, and backlight module 12 more comprises first outer surface 312 (like 6A figure) that one the 3rd reflector plate, 450, the three reflector plates 450 are arranged at first plate body 310.So; The light L32 of the light L16 of the first light source LS1, the 3rd light source LS3 can be reflected by the 3rd reflector plate 450 and guide to trapezoidal plate body 610; Wherein the light L16 of the first light source LS1 can be reflected and guides to the 3rd reflector plate 450 by first reflecting surface 321, again by 450 reflections of the 3rd reflector plate and guide in the trapezoidal plate body 610.The light L32 of the 3rd light source LS3 can be reflected and guides to the 3rd reflector plate 450 by the 5th reflecting surface 331, is guided to trapezoidal plate body 610 by 450 reflections of the 3rd reflector plate again.The part light L26 of secondary light source LS2 can be directed back trapezoidal plate body 610 after being reflected by the 3rd reflector plate 450, and towards 612 outputs of the 3rd outer surface.
See also shown in the 6B figure.6B figure illustrates the side view of one of 6A figure variation.Under the basis according to the 3rd embodiment 3B figure, second LGP 600 more comprises the 3rd outer surface 612 that one the 4th fluorescence coating, 443, the four fluorescence coatings 443 are arranged at trapezoidal plate body 610.The first light source LS1, secondary light source LS2 have the first identical coloured light C1 with the 3rd light source LS3.So, the first coloured light C1 of the first light source LS1, secondary light source LS2 and the 3rd light source LS3 can be transferred to the 4th fluorescence coating 443 by trapezoidal plate body 610.The 4th fluorescence coating 443 receives exciting of the first coloured light C1 and sends the second coloured light C2, and the first coloured light C1 and the second coloured light C2 mixed light are the 3rd coloured light C3.
For example; The first coloured light C1 system that is sent as the first light source LS1, secondary light source LS2 and the 3rd light source LS3 (employing blue-ray LED) is blue light; The 4th fluorescence coating 443 adopts the gold-tinted fluorescence coatings, makes that the second coloured light C2 is a gold-tinted so that mixed light and the 3rd coloured light C3 become white light.Lift another example; The first coloured light C1 that is sent as the first light source LS1, secondary light source LS2 and the 3rd light source LS3 (employing blue-ray LED) is a blue light; The 4th fluorescence coating 443 mixes the fluorescence coating that gets for red fluorescence powder, green emitting phosphor; Make that the second coloured light C2 is red green mixed light, make mixed light and the 3rd coloured light C3 become white light.
See also shown in the 6C figure.6C figure illustrates the side view of the another variation of 6B figure.According to the basis of the 3rd embodiment 6B figure down, first LGP 300 more comprises on first reflecting surface 321, first inner surface 311 and the 5th reflecting surface 331 that one the 3rd fluorescence coating, 433, the three fluorescence coatings 433 are arranged at first plate body 310 continuously.The first light source LS1 and secondary light source LS2 have first coloured light C1 inequality and the 4th coloured light C4 respectively.So, the first coloured light C1 of the first light source LS1 can send the second coloured light C2 through exciting of the 3rd fluorescence coating 433, and the first coloured light C1 and the second coloured light C2 again mixed light be the 3rd coloured light C3.The 4th coloured light C4 of secondary light source LS2 can send multicolored light C5 through exciting of the 4th fluorescence coating 443.Getting into the 3rd coloured light C3 of trapezoidal plate body 610 and the 4th coloured light C4 mixed light of secondary light source LS2 is the 6th coloured light C6.The 6th coloured light C6 and multicolored light C5 mixed light in the 4th fluorescence coating 443 are seven-colour-light C7, so, cooperate the light of the first light source LS1 and secondary light source LS2 finally can export seven-colour-light C7 from the 4th fluorescence coating 443.So; Carry out the light that mixed light possibly can't effectively be mixed into the expection color compared to the fluorescent material of multiple coloured light in the single LGP of prior art; The 3rd coloured light to the second LGP of expection color can be provided, so that multicolored light and the 6th coloured light effectively are mixed into the seven-colour-light of expection color in the variation of this 3rd embodiment at first LGP.
Make a general survey of the variation of above-mentioned 6B, 6C figure, the LED assembly of the first light source LS1 and secondary light source LS2 can be the light emitting diode that does not contain fluorescent material, that is, only utilize the characteristic of light-emitting diode chip for backlight unit to send primitive color light.Because the processing procedure of light-emitting diode chip for backlight unit can be by control stably, so the primitive color light that the light-emitting diode chip for backlight unit of the first light source LS1 and secondary light source LS2 is sent each other comes down to uniformly.
See also shown in the 7A figure.7A figure illustrates the side view of the 3rd embodiment of backlight module 12 of the present invention according to a two-way bright dipping design.
According to the variation again of the 3rd embodiment, bright dipping that backlight module 12 can be two-way (direction D1 and D2), backlight module 12 more comprises one the 4th reflector plate 460.The 4th reflector plate 460 is arranged between first plate body 310 and the trapezoidal plate body 610.For example the 4th reflector plate 460 can only be arranged between the 3rd inner surface of first inner surface 311 and trapezoidal plate body 610 of first plate body 310; Preferably; The 4th reflector plate 460 is after repeatedly bending; Or use pliability the 4th reflector plate 460, can be arranged on first reflecting surface 321, first inner surface 311 and the 5th reflecting surface 331 of first plate body 310, so that between first plate body 310 and trapezoidal plate body 610.
So, the light L33 of the light L17 of the first light source LS1, the 3rd light source LS3 can be reflected by the 4th reflector plate 460 and guide to first outer surface 312; The light L27 of secondary light source LS2 can be reflected and guides to the 3rd outer surface 612 by the 4th reflector plate 460, to provide two-way (direction D1, D2) luminous.
See also shown in the 7B figure.7B figure illustrates the side view of one of 7A figure variation.First outer surface 312 of first plate body 310 of first LGP 300 more comprises one the 3rd fluorescence coating 434.The 3rd outer surface 612 of the trapezoidal plate body 610 of second LGP 600 more comprises one the 4th fluorescence coating 444.So, the first coloured light C1 of the first light source LS1 and the 3rd light source LS3 can transfer to the 3rd fluorescence coating 434 through first LGP 300.The 3rd fluorescence coating 434 receives exciting of the first coloured light C 1 and sends the second coloured light C2, and the first coloured light C1 and the second coloured light C2 mixed light are the 3rd coloured light C3.Likewise, the 4th coloured light C4 of secondary light source LS2 can transfer to the 4th fluorescence coating 444 through second LGP 600.The 4th fluorescence coating 444 receives exciting of the 4th coloured light C4 and sends multicolored light C5, and the 4th coloured light C4 and multicolored light C5 mixed light are the 6th coloured light C6.In addition, the first coloured light C1 of the first light source LS1 does not limit whether have identical color with the second coloured light C2 of secondary light source LS2.
Make a general survey of the variation of above-mentioned 7B figure, the LED assembly of the first light source LS1 and secondary light source LS2 can be the light emitting diode that does not contain fluorescent material, that is, only utilize the characteristic of light-emitting diode chip for backlight unit to send primitive color light.Because the processing procedure of light-emitting diode chip for backlight unit can be by control stably, so the first light source LS1 comes down to the primitive color light that the different light-emitting diode chip for backlight unit of secondary light source LS2 are sent each other uniformly.
According to other variation of above-mentioned the 3rd embodiment, one of them all selectively disposes a micro structured pattern (not illustrating) at least for first inner surface 311, the 3rd inner surface 611, first outer surface 312 and the 3rd outer surface 612.Micro structured pattern comprises a plurality of optical microstructures, can according to suitable arrangement mode (like density, position) be distributed in first inner surface 311, the 3rd inner surface 611, first outer surface 312 and the 3rd outer surface 612 at least one of them.For instance, the distribution density of optical microstructures is along with increasing away from light source.Yet the distribution density of optical microstructures, distribution mode can be decided with design demand, also can adopt regular distribution or random distribution, do not limit at this.
Lift another example; Plan with unidirectional (direction D1) bright dipping; First outer surface 312 or first inner surface, 311 configurable suitable micro structured pattern make the LGP 300 of winning export the more bright dipping of high light-emitting efficiency towards second LGP 600, simultaneously; The 3rd outer surface 612 or the 3rd inner surface 611 configurable suitable micro structured pattern make the 3rd outer surface 612 of second LGP 600 that the more evenly bright dipping of (like atomizing effect) is provided.
Configuration mode about micro structured pattern; These a little optical microstructures can in be embedded in first inner surface 311, the 3rd inner surface 611, first outer surface 312 and the 3rd outer surface 612 at least in one of them, perhaps can solid be convexly equipped with first inner surface 311, the 3rd inner surface 611, first outer surface 312 and the 3rd outer surface 612 at least on one of them.
About the section shape of optical microstructures, these a little optical microstructures can for example be circle, square, rectangle, rhombus, smart circle, triangle, waveform or the like.
In addition, among the 3rd embodiment, first LGP 300 of above-mentioned backlight module 12 and second LGP 600 are the combinations that can have fluorescence coating and micro structured pattern simultaneously.
Consult shown in the 8th figure.The 8th figure illustrates the side view of one of backlight module of the present invention the 4th embodiment.
According to the basis of above-mentioned first embodiment or second embodiment down, it is rectangular that first extension 120 and second extension 420 are distinguished, and when win LGP 100 and second LGP 400 are stacked each other, can complementally coincide each other.First reflecting surface 721 of first extension 120 is positioned at first extension 120 away from first plate body 110 simultaneously, is to connect first incidence surface 122.More dispose a plurality of reflection micro-structurals 722 on first reflecting surface 721.Second reflecting surface 821 is positioned at second extension 420 away from second plate body 110 simultaneously, is to connect second incidence surface 422.More dispose a plurality of reflection micro-structurals 822 on second reflecting surface 821.
So, when the light L18 of the first light source LS1 after reflection micro-structural 722 reflections of first reflecting surface 121, can be directed to the zone of first plate body 110, to increase the luminosity of first LGP 100 away from the first light source LS1.When the light L28 of secondary light source LS2 after reflection micro-structural 822 reflections of second reflecting surface 421, can be directed to the zone of second plate body 410, to increase the luminosity of second LGP 400 away from secondary light source LS2.
Likewise, when the backlight module with the 3rd embodiment was example, first extension of first LGP and the 3rd extension were rectangular respectively.First reflecting surface of first extension is positioned at first extension away from first plate body simultaneously, is to connect first incidence surface.More dispose a plurality of reflection micro-structurals on first reflecting surface.The 5th reflecting surface of the 3rd extension is positioned at the 3rd extension away from first plate body simultaneously, is to connect the 3rd incidence surface.More dispose a plurality of reflection micro-structurals on the 5th reflecting surface.Second LGP comprises a rectangle plate body, coincides in first inner surface and between first extension and the 3rd extension.
Consult the 9th (a) figure to shown in the 9th (f) figure.The 9th (a) schemes to illustrate the side view of backlight module of the present invention to the change in shape of each reflecting surface to the 9th (f) figure.
Among above-mentioned each embodiment, each reflecting surface 700a (i.e. first reflecting surface to the, six reflectings surface) can be merely single inclined plane shape (the 9th (a) figure), that is each reflecting surface is continuous inclined-plane; Perhaps, each reflecting surface 700b demonstrates many inclined plane shapes, and for example each reflecting surface 700b is two continuous inclined-planes (the 9th (b) figure); Perhaps, each reflecting surface 700c can be the combination that presents inclined-plane and plane, and for example the plane connects incidence surface and an inclined-plane (the 9th (c) figure); Perhaps, each reflecting surface 700d, 700e present convex globoidal or cancave cambered surface (the 9th (d) figure, the 9th (e) figure); Perhaps, each reflecting surface 700f can be the plane (the 9th (f) figure) of a parallel external surfaces.
Among above-mentioned each embodiment, the plate body of each LGP (like first plate body, second plate body, trapezoidal plate body) is to be provided with in one piece with extension (like first extension, second extension or the 3rd extension), so that form the continuous incidence surface of an increasing.Yet the present invention is not limited to this, and plate body of each LGP and extension also can be respectively independent setting, and is interfixed by an adhesion layer 900 respectively, so also forms the discontinuous incidence surface of an increasing.
Below be that plate body and the extension that example is described LGP is the embodiment of independent setting with the backlight module 10 of first embodiment; Be not limited only to the implementation of first embodiment, this embodiment also can be practiced on the backlight module of above-mentioned second embodiment, the 3rd embodiment, the 4th embodiment.
Consult shown in the 10th figure.The 10th figure illustrates the side view of one of each embodiment of backlight module of the present invention variation.First LGP 100 more comprises an adhesion layer 900.Adhesion layer 900 is arranged between first plate body 110 and first extension 120, with so that first extension 120 be fixed on first plate body 110.
Likewise; When the backlight module 12 with the 3rd embodiment is example; First plate body can be respectively be provided with first extension and the 3rd extension system independently, makes win extension and the 3rd extension first plate body is fixed on first extension and the 3rd extension respectively by an adhesion layer.
The present invention discloses among each embodiment as above; Be not in order to limiting the present invention, anyly have the knack of this skill, in spirit that does not break away from the present invention and scope; When can doing various changes and retouching, so the present invention's protection domain is when looking in the scope that accompanying Claim protects.
Claims (9)
1. a backlight module is characterized in that comprising: one first LGP that stacks each other and one second LGP; This first LGP comprises: one first plate body; Described first plate body one of has relatively first inner surface and one first outer surface, and this first inner surface is in the face of this second LGP; One first extension; Described first extending part is in the edge of this first inner surface; And this first plate body extends a side of this second LGP towards the direction of this second LGP certainly; This first extension and this first plate body constitute continuous first incidence surface altogether; This first extension is tool one first reflecting surface also, and this first reflecting surface connects this first incidence surface and this first inner surface; And one the 3rd reflecting surface; Described the 3rd reflecting surface is positioned at this first plate body away from one of this first incidence surface side; This second LGP comprises: one second plate body; Described second plate body one of has relatively second inner surface and one second outer surface, and this second inner surface is in the face of this first inner surface; One second extension; Described second extending part is in the edge of this second inner surface away from this first extension; And this second plate body extends this first LGP away from one of this first incidence surface side towards the direction of this first LGP certainly; This second extension and this second plate body constitute continuous second incidence surface altogether; This second extension is tool one second reflecting surface also; This second reflecting surface is faced the 3rd reflecting surface, and connects this second incidence surface and this second inner surface, the external form of external form coupling the 3rd reflecting surface of this second reflecting surface; And one the 4th reflecting surface; Described the 4th reflecting surface is positioned at this second plate body away from one of this second incidence surface side, and in the face of this first reflecting surface, the external form of this first reflecting surface of the external form of the 4th reflecting surface coupling; One first light source; Described first light source is positioned at a side of this first incidence surface, and towards this first incidence surface throw light; The light of this this first light source of first reflecting surface guiding is to this first outer surface; And a secondary light source, this secondary light source is positioned at one of this second incidence surface side, and towards this second incidence surface throw light.
2. backlight module according to claim 1 is characterized in that also comprising: one first reflector plate; Described first reflector plate is arranged on this first outer surface of this first plate body; And this second LGP also comprises a fluorescence coating, and this fluorescence coating is arranged on this second outer surface of this second plate body.
3. backlight module according to claim 2 is characterized in that: this first LGP also comprises another fluorescence coating, and this another fluorescence coating is arranged on this first inner surface of this first plate body.
4. backlight module according to claim 1 is characterized in that also comprising: one second reflector plate; Described second reflector plate is arranged between this first plate body and this second plate body; This first LGP also comprises a fluorescence coating, and this fluorescence coating is arranged on this first outer surface of this first plate body; This second LGP also comprises another fluorescence coating, and this another fluorescence coating is arranged on this second outer surface of this second plate body.
5. backlight module according to claim 1 is characterized in that: one of them has combination, convex globoidal or the cancave cambered surface on single inclined-plane, many inclined-planes, plane, inclined-plane and plane at least for this first reflecting surface and this second reflecting surface.
6. backlight module according to claim 1 is characterized in that: one of them disposes a micro structured pattern at least for this first inner surface, this second inner surface, this first outer surface and this second outer surface.
7. backlight module according to claim 1 is characterized in that: first plate body and this first extension are to be provided with in one piece.
8. backlight module according to claim 1 is characterized in that: this first LGP also comprises: an adhesion layer; Described adhesion layer is arranged between this first plate body and this first extension, with so that this first extension be fixed on this first plate body.
9. backlight module according to claim 1 is characterized in that: this first extension is rectangular, and this first reflecting surface is positioned at this first extension away from this first plate body simultaneously, and a plurality of reflection micro-structurals of this first reflection mask.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102316103A CN102748677A (en) | 2011-05-12 | 2011-05-12 | Backlight module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102316103A CN102748677A (en) | 2011-05-12 | 2011-05-12 | Backlight module |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110122488 Division CN102155698B (en) | 2011-05-12 | 2011-05-12 | Backlight module |
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| CN102748677A true CN102748677A (en) | 2012-10-24 |
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| CN104134407A (en) * | 2014-07-28 | 2014-11-05 | 联想(北京)有限公司 | Electronic equipment |
| CN105511008A (en) * | 2012-12-27 | 2016-04-20 | 厦门天马微电子有限公司 | Light guide device used for liquid crystal displayer |
| CN108493027A (en) * | 2018-01-18 | 2018-09-04 | 苏州达方电子有限公司 | Backlight module and illuminated keyboard comprising it |
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