CN103900030A - Optical coupling device and backlight module - Google Patents
Optical coupling device and backlight module Download PDFInfo
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- CN103900030A CN103900030A CN201210578513.1A CN201210578513A CN103900030A CN 103900030 A CN103900030 A CN 103900030A CN 201210578513 A CN201210578513 A CN 201210578513A CN 103900030 A CN103900030 A CN 103900030A
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- light
- light guide
- face
- guide section
- exiting surface
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Abstract
The invention relates to an optical coupling device used for enabling light rays emitted out from a plurality of light sources to be coupled into a light guide plate. The optical coupling device comprises a plurality of light guide parts. All the light guide parts are made of light transmitting materials and used for being arranged corresponding to the light sources respectively. Each light guide part comprises a light-in face, a light-out face, a top face and a bottom face. Each light-in face and the corresponding light-out face are oppositely arranged, each top face and the corresponding bottom face are oppositely arranged, and the top faces and the bottom faces are both connected with the light-in faces and the light-out faces. Each top face is perpendicular to the corresponding light-in face and the light-out face. The thickness of the light-in faces is larger than the thickness of the light-out faces in the direction perpendicular to the top faces. The light-in faces of the light guide parts are used for conducting optical coupling with the corresponding light sources, the light-out faces of the light guide parts are used for conducting optical coupling with the light guide plate, and thus the optical coupling efficiency of the light guide plate and the light sources can be improved while the thickness of the light sources is not decreased. The invention further relates to a backlight module using the optical coupling device.
Description
Technical field
The present invention relates to a kind of optically coupled device and a kind of backlight module.
Background technology
The thickness of the LGP of present side-mounted backlight module is more and more thinner, in order to guarantee there is higher coupling efficiency between light source and LGP, just needs the thickness of light source also more and more thinner.But the thickness of light source is made the same with LGP thin, more difficult like this, caused optocoupler and efficiency between light source and LGP lower.
Summary of the invention
In view of this, be necessary to provide a kind of optically coupled device and a kind of backlight module, in not reducing light source thickness, can improve the coupling efficiency between LGP and light source.
A kind of optically coupled device, is coupled in a LGP for the light that multiple light sources are launched.This optically coupled device comprises multiple light guide sections.The plurality of light guide section makes and is respectively used to setting corresponding to the plurality of light source by light transmissive material.Each light guide section comprises incidence surface, exiting surface, end face and bottom surface.This incidence surface and the opposing setting of this exiting surface.The opposing setting of this end face and this bottom surface.This end face and this bottom surface all connect this incidence surface and this exiting surface.This end face is perpendicular to this incidence surface and this exiting surface.Along the direction perpendicular to this end face, the thickness of this incidence surface is greater than the thickness of this exiting surface.This incidence surface of this light guide section is for carrying out optically-coupled with corresponding light source, and this exiting surface of this light guide section is for carrying out optically-coupled with this LGP.
A kind of backlight module, it comprises optically coupled device, multiple light source and LGP.This optically coupled device, between this LGP and the plurality of light source, is coupled in this LGP for the light that multiple light sources are launched.This optically coupled device comprises multiple light guide sections.The plurality of light guide section makes and is respectively used to setting corresponding to the plurality of light source by light transmissive material.Each light guide section comprises incidence surface, exiting surface, end face and bottom surface.This incidence surface and the opposing setting of this exiting surface.The opposing setting of this end face and this bottom surface.This end face and this bottom surface all connect this incidence surface and this exiting surface.This end face is perpendicular to this incidence surface and this exiting surface.Along the direction perpendicular to this end face, the thickness of this incidence surface is greater than the thickness of this exiting surface.This incidence surface of this light guide section is for carrying out optically-coupled with corresponding light source.This exiting surface of this light guide section is for carrying out optically-coupled with this LGP.
Compared with prior art, optically coupled device of the present invention and backlight module, because the thickness of the plurality of light source is greater than the thickness of this LGP, the thickness of this incidence surface of optically coupled device of the present invention is greater than the thickness of this exiting surface, the light that the plurality of light source is launched is from this incidence surface incident, and penetrate and enter this LGP from this exiting surface, the coupling efficiency of the plurality of light source and this incidence surface is increased, the coupling efficiency of this exiting surface and this LGP increases, thereby realize in not reducing light source thickness, can improve the coupling efficiency between LGP and light source.
Accompanying drawing explanation
Fig. 1 is the structural representation of the backlight module of preferred embodiments of the present invention.
Fig. 2 is the structural representation of the light guide section of the backlight module of Fig. 1.
Fig. 3 is that the light guide section of backlight module of Fig. 1 is along the cutaway view of III-III direction.
Main element symbol description
| |
400 |
| Optically coupled |
100 |
| |
200 |
| Illuminating |
210 |
| |
220 |
| LGP | 300 |
| |
10 |
| |
11 |
| Exiting |
12 |
| |
13 |
| |
14 |
| The first reflectance coating | 15 |
| |
110 |
| |
111 |
| |
112 |
| Connecting |
20 |
| |
21 |
| |
22 |
| The |
23 |
| The |
24 |
| The second reflectance coating | 25 |
The following specific embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
The specific embodiment
Refer to Fig. 1, a kind of backlight module 400 that embodiment of the present invention provides, it comprises a LGP 300, multiple light source 200 and optically coupled device 100.This optically coupled device 100, between this LGP 300 and the plurality of light source 200, is coupled in this LGP 300 for the light that the plurality of light source 200 is launched.In the present embodiment, the plurality of light source 200 is light emitting diode (Light emitting module, LED), and each light source 200 includes an illuminating part 210 and a substrate 220.This illuminating part 210 is fixed on this substrate 220, and is electrically connected with this substrate 220.This substrate 220 is electrically connected with an external circuits plate (not shown), makes this substrate 220 receive the signal of telecommunication from this external circuits plate, launches light to control this illuminating part 210.
This optically coupled device 100 comprises multiple light guide sections 10 and a connecting portion 20.The plurality of light guide section 10 and this connecting portion 20 are made by light transmissive material.
Shown in Fig. 2 and Fig. 3, the structure of the plurality of light guide section 10 is identical, and setting corresponding to the plurality of light source 200.Each light guide section 10 is wedge shape platy structure, and it comprises incidence surface 11, exiting surface 12, end face 13 and bottom surface 14.This incidence surface 11 and the opposing setting of this exiting surface 12.This end face 13 and this opposing setting in bottom surface 14, and all connect this incidence surface 11 and this exiting surface 12.This end face 13 is perpendicular to this incidence surface 11 and this exiting surface 12, and relative this end face 13 in this bottom surface 14 is obliquely installed.In the direction perpendicular to this end face 13, the thickness of this incidence surface 11 is greater than the thickness of this exiting surface 12.The plurality of light source 200 carries out optically-coupled with this incidence surface 11 of corresponding light guide section 10 respectively.On this end face 13 and this bottom surface 14, be all coated with the first reflectance coating 15, thereby the light of injecting this light guide section 10 is reflected, prevent that this light from penetrating from this end face 13 and this bottom surface 14, also make this light be passed to this exiting surface 12 simultaneously, and penetrate from this exiting surface 12.
On this incidence surface 11, offer a storage tank 110, this storage tank 110 runs through this end face 13 simultaneously.This storage tank 110 comprise one with the sidewall 111 of these exiting surface 12 opposing settings.This sidewall 111 is offered a light divergence hole 112.This light divergence hole 112 is roughly column structure, and is cambered surface on the surface near this exiting surface 12.This substrate 220 of this light source 200 is contained in this storage tank 110, and this illuminating part 210 stretches in this light divergence hole 112, makes the plurality of light source 200 and these LGP 300 exactitude positions.This light divergence hole 112 is dispersed effectively for the light that corresponding illuminating part 210 is launched, with the emergent ray that solves corresponding light source 200 in the part of the zero degree angle of emergence because light energy is too strong, and the too weak and inhomogeneous phenomenon of ray density that causes of the part light of other angles of emergence makes from the ray density of this exiting surface 12 outgoing of this light guide section 10 even.
This connecting portion 20 is rod-like structure, for connecting the plurality of light guide section 10, and by the light conduction of the plurality of exiting surface 12 outgoing to this LGP 300.This connecting portion 20 comprises upper surface 21, lower surface 22, the first side 23 and the second side 24.This upper surface 21 and the opposing setting of this lower surface 22, and be all coated with the second reflectance coating 25.This first side 23 and this opposing setting in the second side 24.This first side 23 contacts with this exiting surface 12 of the plurality of light guide section 10, and carries out optically-coupled, to receive the light of the plurality of light guide section 10 outgoing.Optically-coupled is carried out with this LGP 300 in this second side 24, so that the light of injecting this connecting portion 20 is passed in this LGP 300.In the direction perpendicular to this end face 13, the thickness of this second side 24 equals the thickness of this LGP 300.In the present embodiment, between the edge of the exiting surface 12 of the edge of this connecting portion 20 and each this light guide section 10, carrying out a glue fixes.Certainly, this connecting portion 20 is not limited to present embodiment with the connected mode of the plurality of light guide section 10, and this connecting portion 20 also can be integrated formed structure with the plurality of light guide section 10.In other embodiments, this connecting portion 20 also can save.
Compared with prior art, because the thickness of the plurality of light source 200 is greater than the thickness of this LGP 300, optically coupled device 100 of the present invention, the thickness of this incidence surface 11 is greater than the thickness of this exiting surface 12, the light that the plurality of light source 200 is launched is from these incidence surface 11 incidents, and penetrate and enter this LGP 300 from this exiting surface 12, the plurality of light source 200 and the coupling efficiency of this incidence surface 11 are increased, this exiting surface 12 increases with the coupling efficiency of this LGP 300, thereby realize in not reducing the plurality of light source 200 thickness, can improve the coupling efficiency between this LGP 300 and the plurality of light source 200.
Be understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion by technical conceive according to the present invention, and all these change the protection domain that all should belong to the claims in the present invention with distortion.
Claims (10)
1. an optically coupled device, be coupled in a LGP for the light that multiple light sources are launched, this optically coupled device comprises multiple light guide sections, the plurality of light guide section makes and is respectively used to setting corresponding to the plurality of light source by light transmissive material, each light guide section comprises incidence surface, exiting surface, end face and bottom surface, this incidence surface and the opposing setting of this exiting surface, the opposing setting of this end face and this bottom surface, this end face and this bottom surface all connect this incidence surface and this exiting surface, this end face is perpendicular to this incidence surface and this exiting surface, along the direction perpendicular to this end face, the thickness of this incidence surface is greater than the thickness of this exiting surface, this incidence surface of this light guide section is for carrying out optically-coupled with corresponding light source, this exiting surface of this light guide section is for carrying out optically-coupled with this LGP.
2. optically coupled device as claimed in claim 1, is characterized in that, this end face and this bottom surface are for reflecting the light of injecting this light guide section, so that this light is passed to this exiting surface from this incidence surface.
3. optically coupled device as claimed in claim 1, is characterized in that, this incidence surface offers a storage tank, and the plurality of light source is contained in respectively in this storage tank of corresponding light guide section, makes the plurality of light source and this light guide section exactitude position.
4. optically coupled device as claimed in claim 3, it is characterized in that, this storage tank comprise one with the opposing sidewall of this exiting surface, this sidewall is offered a light divergence hole, the surface near this exiting surface of this light divergence hole is cambered surface, this light source comprises an illuminating part and a substrate, this illuminating part is arranged on this substrate, this substrate is contained in this storage tank, this illuminating part stretches in this light divergence hole, this light divergence hole is dispersed effectively for light that corresponding illuminating part is launched, makes from the ray density of this exiting surface outgoing of this light guide section even.
5. optically coupled device as claimed in claim 1, is characterized in that, this optically coupled device also comprises a shaft-like connecting portion, this connecting portion is made up of light transmissive material, this connecting portion contacts with the plurality of exiting surface, for connecting the plurality of light guide section, and carries out optically-coupled with the plurality of exiting surface.
6. optically coupled device as claimed in claim 5, is characterized in that, this connecting portion comprises upper surface, lower surface, the first side and the second side; This upper surface and the opposing setting of this lower surface; This first side and this opposing setting in the second side; This exiting surface of this first side and the plurality of light guide section carries out optically-coupled, to receive the light of the plurality of light guide section outgoing; This second side and this LGP carry out optically-coupled, so that the light of injecting this connecting portion is passed in this LGP; In the direction perpendicular to this end face, the thickness of this second side equals the thickness of this LGP.
7. a backlight module, it comprises LGP, multiple light sources and optically coupled device, this optically coupled device is between this LGP and the plurality of light source, be coupled in this LGP for the light that the plurality of light source is launched, this optically coupled device comprises multiple light guide sections, the plurality of light guide section is made by light transmissive material and setting corresponding to the plurality of light source respectively, each light guide section comprises incidence surface, exiting surface, end face and bottom surface, this incidence surface and the opposing setting of this exiting surface, the opposing setting of this end face and this bottom surface, this end face and this bottom surface all connect this incidence surface and this exiting surface, this end face is perpendicular to this incidence surface and this exiting surface, along the direction perpendicular to this end face, the thickness of this incidence surface is greater than the thickness of this exiting surface, this incidence surface of this light guide section carries out optically-coupled with corresponding light source, this exiting surface and this LGP of this light guide section carry out optically-coupled.
8. backlight module as claimed in claim 7, it is characterized in that, this incidence surface offers a storage tank, this storage tank comprise one with the opposing sidewall of this exiting surface, this sidewall is offered a light divergence hole, the surface near this exiting surface of this light divergence hole is cambered surface, this light source comprises an illuminating part and a substrate, this illuminating part is arranged on this substrate, this substrate is contained in this storage tank, this illuminating part stretches in this light divergence hole, this light divergence hole is dispersed effectively for the light that corresponding illuminating part is launched, make from the ray density of this exiting surface outgoing of this light guide section even.
9. backlight module as claimed in claim 7, it is characterized in that, this optically coupled device also comprises a shaft-like connecting portion, and this connecting portion is made up of light transmissive material, this connecting portion contacts to be connected the plurality of light guide section with the plurality of exiting surface, and carries out optically-coupled with the plurality of exiting surface.
10. backlight module as claimed in claim 9, is characterized in that, this connecting portion comprises upper surface, lower surface, the first side and the second side; This upper surface and the opposing setting of this lower surface; This first side and this opposing setting in the second side; This exiting surface of this first side and the plurality of light guide section carries out optically-coupled, to receive the light of the plurality of light guide section outgoing; This second side and this LGP carry out optically-coupled, so that the light of injecting this connecting portion is passed in this LGP; In the direction perpendicular to this end face, the thickness of this second side equals the thickness of this LGP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210578513.1A CN103900030A (en) | 2012-12-28 | 2012-12-28 | Optical coupling device and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210578513.1A CN103900030A (en) | 2012-12-28 | 2012-12-28 | Optical coupling device and backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103900030A true CN103900030A (en) | 2014-07-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210578513.1A Pending CN103900030A (en) | 2012-12-28 | 2012-12-28 | Optical coupling device and backlight module |
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| Country | Link |
|---|---|
| CN (1) | CN103900030A (en) |
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| US20090027920A1 (en) * | 1995-06-27 | 2009-01-29 | Parker Jeffery R | Light emitting panel assemblies |
| CN101377586A (en) * | 2007-08-29 | 2009-03-04 | 奇力光电科技股份有限公司 | Backlight module unit and LCD device having the same |
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| CN102374449A (en) * | 2010-08-09 | 2012-03-14 | 荣晋精密科技股份有限公司 | Light-emitting unit and backlight module comprising same |
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Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040012946A1 (en) * | 1995-06-27 | 2004-01-22 | Parker Jeffery R. | Light emitting panel assemblies |
| US20090027920A1 (en) * | 1995-06-27 | 2009-01-29 | Parker Jeffery R | Light emitting panel assemblies |
| CN1892361A (en) * | 2005-07-06 | 2007-01-10 | 三星电机株式会社 | Light source-guide structure of backlight apparatus and backlight apparatus having the same |
| US20080106914A1 (en) * | 2006-11-03 | 2008-05-08 | Innocom Technology (Shenzhen) Co., Ltd.; Innolux Display Corp. | Point light source having light guide portion and backlight module using same |
| CN101377586A (en) * | 2007-08-29 | 2009-03-04 | 奇力光电科技股份有限公司 | Backlight module unit and LCD device having the same |
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| CN201527525U (en) * | 2009-09-18 | 2010-07-14 | 厦门敏讯信息技术股份有限公司 | Backlight source structure of liquid crystal module |
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Application publication date: 20140702 |