CN102109130A - Backlight module - Google Patents
Backlight module Download PDFInfo
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- CN102109130A CN102109130A CN2010105349720A CN201010534972A CN102109130A CN 102109130 A CN102109130 A CN 102109130A CN 2010105349720 A CN2010105349720 A CN 2010105349720A CN 201010534972 A CN201010534972 A CN 201010534972A CN 102109130 A CN102109130 A CN 102109130A
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- light
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- backlight module
- optical coupling
- lgp
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Abstract
The invention discloses a backlight module which comprises a light guide plate and multiple optical coupling units, wherein the optical coupling units are arranged below the light guide plate; each optical coupling unit comprises an optical coupling material, an optical cement and multiple light emitting components; the upper surface of the optical coupling material faces to the light guide plate; the optical cement is adhered between the upper surface of the optical coupling material and the light guide plate; and the light emitting components are arranged on the side of the optical coupling material. The backlight module disclosed by the invention can lead in the light rays emitted by the light emitting components with high efficiency by utilizing the optical coupling material and can lead the light out of the light guide plate through a scattering structure within a transfer distance so as to be beneficial to the expression of region control brightness.
Description
Technical field
The present invention relates to a kind of backlight technology, and be particularly related to a kind of backlight module.
Background technology
Along with the liquid crystal indicator manufacturing technology is progressive fast, with and possess advantages such as frivolous, power saving and radiationless line arranged, make liquid crystal indicator be applied in large quantities in the various electronic products such as personal digital aid (PDA), notebook computer, digital camera, digital camera shadow machine, mobile phone, computer screen and LCD TV.Add the positive input research and development of industry and adopt the production equipment that maximizes, the quality of liquid crystal indicator is constantly promoted, and price continues to descend.Therefore, make the application of liquid crystal indicator enlarge rapidly.But,, need could produce the function of display frame with the light that backlight module provided because the display panels in the liquid crystal indicator is the display floater of non-self-luminosity.
With reference to Fig. 1, Fig. 1 is a kind of profile of direct type backlight module.As shown in Figure 1, direct type backlight module comprises light source 110 and diffuser plate 120, and when using, light source 110 sends light 112 towards diffuser plate 120.In order to reduce required light mixing distance 114, can change the field shape (as shown in Figure 2) of light source 110 luminous 112 by the lens 130 that add, with further reduction light mixing distance.
Yet, aforementioned two kinds of direct type backlight modules carrying, its light mixing distance still needs 10～15mm.In addition, use extra lens 130 will increase the whole cost and the assembling complexity of backlight module.
Summary of the invention
Therefore, an aspect of the present invention is that a kind of backlight module is being provided, and effectively slimming and have the characteristic of Region control concurrently is put forward the quality of image with lifting, and reduced whole cost and assembling complexity.
According to one embodiment of the invention, a kind of backlight module comprises a LGP and a plurality of optical coupling unit.These optical coupling units are arranged at the LGP below, and wherein each optical coupling unit comprises an optically-coupled material, an optical cement and a plurality of light-emitting component.The upper surface of optically-coupled material is towards LGP, and optical cement is attached between the upper surface and LGP of optically-coupled material, and light-emitting component is arranged at the side of optically-coupled material.
Moreover LGP has a surface towards a plurality of optical coupling units, and this surperficial subregion directly contacts these optical coupling units, and the zone that this surface does not contact these optical coupling units then is provided with diffusing structure (scatter).
In sum, technical scheme of the present invention compared with prior art has tangible advantage and beneficial effect.By technique scheme, can reach suitable technological progress, and have the extensive value on the industry, it has following advantage at least:
1. utilize the optically-coupled material, the light that light-emitting component sent is imported expeditiously; And
2. in transmitting distance, photoconduction is gone out LGP, be beneficial to the performance of Region control brightness by diffusing structure.
Below will do detailed description to above-mentioned explanation and ensuing embodiment, and provide further explanation technical scheme of the present invention with embodiment.
Description of drawings
For above-mentioned and other purposes of the present invention, feature, advantage and embodiment can be become apparent, the description of the drawings is as follows:
Fig. 1 is a kind of profile of direct type backlight module;
Fig. 2 is the profile of another kind of direct type backlight module;
Fig. 3 is according to the profile of a kind of backlight module of one embodiment of the invention and partial enlarged drawing;
Fig. 4 is according to the optically-coupled material of the shown Fig. 3 of one embodiment of the invention and the vertical view of light-emitting component;
Fig. 5 is according to the optically-coupled material of the shown Fig. 3 of another embodiment of the present invention and the vertical view of light-emitting component;
Fig. 6 is according to the optically-coupled material of the shown Fig. 3 of further embodiment of this invention and the vertical view of light-emitting component;
Fig. 7 is that optically-coupled material, light-emitting component according to the shown Fig. 3 of one embodiment of the invention is in conjunction with the schematic perspective view of light shield; And
Fig. 8 is the spread pattern according to the optical coupling unit of the shown Fig. 3 of one embodiment of the invention.
Wherein, description of reference numerals is as follows:
110: 331: the first districts of light source
112: 332: the second districts of light
114: light mixing distance 333: reflecting layer
120: diffuser plate 410: the optically-coupled material
130: lens 412: groove
310: LGP 420: optical cement
312: diffusing structure 430: light-emitting component
320: optical coupling unit 432: light
322: light 440: light shield
330: circuit board A: zone
The specific embodiment
In order to make narration of the present invention more detailed and complete, can be with reference to the appended various embodiment of graphic and the following stated, graphic in identical number represent same or analogous element.On the other hand, well-known element and step are not described among the embodiment, to avoid that the present invention is caused unnecessary restriction.
" pact " used herein, " approximately " or " roughly " but in order to modifying the quantity of any slight variations, but this slight variations can't change its essence.Unless otherwise noted, then representing the error in value scope of being modified with " pact ", " approximately " or " roughly " generally is to allow in 20 percent in embodiment, be preferably in 10, and more preferably then be in percentage five.
With reference to Fig. 3, Fig. 3 is according to the profile of a kind of backlight module of one embodiment of the invention and partial enlarged drawing.As shown in Figure 3, backlight module comprises a LGP 310 and a plurality of optical coupling units 320.These optical coupling units 320 are arranged at LGP 310 belows, and optical coupling unit 320 can emit beam 322 and be coupled in the LGP 310, and LGP 310 can be with outside the photoconduction ejecting plate.
In backlight module, owing to no light mixing distance, can significantly reduce the thickness of backlight module, effectively slimming.In addition, lens need not be adopted, whole cost and assembling complexity can be reduced.On real the work, the thickness of backlight module can be contracted to below about 5mm, for example is about 3～5mm, and wherein the thickness of LGP 310 is about 2mm, and the thickness of optical coupling unit 320 is about 1mm.
In addition, the lower surface of LGP 310 is towards a plurality of optical coupling units 320, and wherein the subregion of the lower surface of LGP 310 directly contacts optical coupling unit 320, and the zone that lower surface does not contact optical coupling unit 320 then is provided with diffusing structure 312.On real the work, can form the light scattering pattern in the zone that does not contact optical coupling unit 320 of the lower surface of LGP 310 with as diffusing structure 312, photoconduction can be gone out LGP 310 by diffusing structure 312, to provide evenly and the higher bright dipping of briliancy.In addition, though scheme not show, except that the lower surface in LGP 310 forms the light scattering pattern, can more in the upper surface formation light scattering pattern of LGP 310.
Structurally, LGP 310 is one-body molded, but not is combined by several less LGPs.Utilize integrated LGP 310, can avoid the phenomenon of light and shade inequality, thereby promote the quality of image so that distribution of light is even.In control experiment, if be spliced into LGP 310 with several less LGPs, the joint between little LGP then has the phenomenon of light and shade inequality, has reduced the quality of image.
About the structure of optical coupling unit 320, shown in the enlarged drawing of regional A among Fig. 3, each optical coupling unit 320 comprises an optically-coupled material 410, an optical cement 420 and a plurality of light-emitting components 430.Structurally, the upper surface of optically-coupled material 410 is towards LGP 310, and optical cement 420 is attached between the upper surface and LGP 310 of optically-coupled material 410, and light-emitting component 430 is arranged at the side of optically-coupled material 410.
By this, utilize optical cement 420 that the air-gap between optically-coupled material 410 and the LGP 310 is filled up, to form light contact (optical contact).Therefore, the light 432 that is sent by light-emitting component 430 will be imported by the side of optically-coupled material 410, can pass this light contact interface subsequently and import in the LGP 310, and LGP 310 in, can spread and come by total reflection (Total Internal Reflection).The micro-structural that the light of conduction can be by the tool scattering properties in LGP 310 (that is, diffusing structure 312), equably photoconduction is gone out outside the LGP 310.
Aspect material, the material of optically-coupled material 410 for example can be polymethyl methacrylate (PMMA), Merlon (PC) or other suitable material or above-mentioned derivative or above-mentioned combination.Optical cement 420 can have water white transparency, light transmittance more than 90%, cementing strength is good, can under room temperature or middle temperature, solidify, and characteristics such as cure shrinkage is little are arranged.For instance, the material of optical cement 420 can be organic silicon rubber, acrylic type resin, unsaturated polyester (UP), polyurethane, epoxy resin or other suitable material or above-mentioned derivative or above-mentioned combination.
In an embodiment, the refractive index of the refractive index of LGP 310, optical cement 420 is all identical with the refractive index of optically-coupled material 410, uses the efficient that promotes the light conduction.Perhaps, in another embodiment, the refractive index of the refractive index of optically-coupled material 410 and LGP 310 can be different, for instance, if the refractive index of optically-coupled material 410 is greater than the refractive index of LGP 310, it is concentrated relatively then can to allow light enter the scope of LGP 310, when the shading value of Region control (Local Dimming) optical coupling unit 320, can make that the contrast of image is comparatively remarkable; If the refractive index of optically-coupled material 410 is less than the refractive index of LGP 310, then the scope that can allow light enter LGP 310 is expanded relatively, makes distribution of light comparatively even.Those skilled in the art can look and design the index of refraction relationship that elasticity of demand is selected LGP 310, optical cement 420 and optically-coupled material 410 at that time.
In addition, if the refractive index of optically-coupled material 410 is different with the refractive index of LGP 310, then the refractive index of the refractive index of optically-coupled material 410 or LGP 310 can equal the refractive index of optical cement 420, to reduce light loss.
As shown in Figure 3, backlight module also can comprise a circuit board 330.Circuit board 330 is arranged at the below of a plurality of optical coupling units 320, to carry these optical coupling units 320.Circuit on the circuit board 330 can electrically connect light-emitting component 430 and outside drive circuit (not shown), and drive circuit can be controlled flickering of each light-emitting component 430 and brightness via the circuit of circuit board 330.
Shown in the enlarged drawing of regional A, circuit board 330 is arranged at the below of optically-coupled material 410, circuit board 330 surfaces can comprise first district 331 and second district 332, first district 331 is provided with light-emitting component 430,332 in second district is provided with a reflecting layer 333, the lower surface contact reflex layer 333 of optically-coupled material 410 is to promote the light reflection efficiency.
On real the work, light-emitting component 430 can be light-emitting diode, EL part or similar light-emitting device.Because light-emitting component 430 encapsulation characteristics, the light that it sent also may be spilt by non-light-emitting area, and then forms bright spot (Hot Spot) above the light contact-making surface.Therefore can add a light shield 440 (Cover) in the outside of optically-coupled material 410, the side of light shield 440 shield light coupling material 410 and the top and the outside of light-emitting component 430 can effectively reduce the problem of light leak.According to this light inlet and shading framework, the coupling efficiency that enters LGP 310 can reach more than 95%, and light leak can be reduced to about 2% simultaneously.
With reference to Fig. 4, Fig. 4 is according to the optically-coupled material 410 of the shown Fig. 3 of one embodiment of the invention and the vertical view of light-emitting component 430.As shown in Figure 4, optically-coupled material 410 be shaped as octagon, four light-emitting components 430 are enclosed in the side of optically-coupled material 410 equally spacedly, to avoid the generation of blanking bar (dark area), guarantee that light enters the angular distribution that can contain 360 degree behind the LGP.
With reference to Fig. 5, Fig. 5 is according to the optically-coupled material 410 of the shown Fig. 3 of another embodiment of the present invention and the vertical view of light-emitting component 430.As shown in Figure 5, optically-coupled material 410 be shaped as hexagon, six light-emitting components 430 are enclosed in the side of optically-coupled material 410 equally spacedly, to avoid the generation of blanking bar, guarantee that light enters the angular distribution that can contain 360 degree behind the optically-coupled material 410.
With reference to Fig. 6, Fig. 6 is according to the optically-coupled material 410 of the shown Fig. 3 of further embodiment of this invention and the vertical view of light-emitting component 430.As shown in Figure 6, the side of optically-coupled material 410 is provided with a plurality of grooves 412 equally spacedly, and a plurality of light-emitting components 430 are arranged at respectively in these grooves 412, to promote the efficient that light is incident to optically-coupled material 410.
In sum, the shape of optically-coupled material 410 can be polygon, and its concrete geometry can adjust according to the number that uses light-emitting component 430, and can form grooving putting for light-emitting component 430 in optically-coupled material 410.On real the work, the mode that the light-emitting component 430 in the optical coupling unit 320 is put can be adopted spacing ground and be arranged, and the quantity of light emitting diode 430, is guaranteed can contain 360 angular distribution of spending after light enters LGP to avoid the generation of blanking bar more than or equal to four.In control experiment, if the quantity of light emitting diode 430 less than four, then easily has the generation of blanking bar.
Fig. 7 is that optically-coupled material 410, light-emitting component 430 according to the shown Fig. 3 of one embodiment of the invention is in conjunction with the schematic perspective view of light shield 440.As shown in Figure 7, the side of light shield 440 shield light couplings material 410 and the top and the outside of light-emitting component 430 can effectively reduce the problem of light leak.Aspect material, the material of light shield 440 for example can be metal, opaque plastic cement or other suitable material or above-mentioned derivative or above-mentioned combination, and the light shield 440 preferable reflecting materials that can be, for example be the reflexive metals of tool such as aluminium, silver, perhaps as Merlon (polycarbonate, PC) etc., but be not limited to above-mentioned, also can the reflection material be set in light shield 440 inboards, for example be the reflexive metals of tool such as aluminium, silver, perhaps as Merlon etc., mat utilizes light shield 440 reflections to reclaim light leaks, more to improve the light utilization efficiency of light-emitting component 430.
With reference to Fig. 8, Fig. 8 is the spread pattern according to the shown a plurality of optical coupling units 320 of one embodiment of the invention.As shown in Figure 8, these optical coupling units 320 are arranged at LGP 310 belows, and are arrayed, but the wherein interior brightness of each optical coupling unit 320 Region control place dashed rectangle, make the effective slimming of backlight module and have the characteristic of Region control concurrently, and then put forward the quality of image.
In addition, except rectangular array illustrated in fig. 8, in other embodiment, a plurality of optical coupling units 320 can be scattered in staggered or other arrays, and those skilled in the art select it when looking at that time elasticity of demand.
Though the present invention with embodiment openly as above; right its is not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking the protection domain that claim defined of enclosing.
Claims (13)
1. backlight module comprises at least:
One LGP; And
A plurality of optical coupling units are arranged at this LGP below, and wherein each described optical coupling unit comprises:
One optically-coupled material, its upper surface is towards this LGP;
One optical cement is attached between this upper surface and this LGP; And
A plurality of light-emitting components are arranged at the side of this optically-coupled material.
2. backlight module as claimed in claim 1, wherein each described optical coupling unit also comprises:
One light shield covers the side of this optically-coupled material and the top and the outside of described a plurality of light-emitting components.
3. backlight module as claimed in claim 1, wherein this LGP has a surface towards described a plurality of optical coupling units, this surperficial subregion directly contacts described a plurality of optical coupling unit, and the zone that should the surface contact described a plurality of optical coupling units then is provided with diffusing structure.
4. backlight module as claimed in claim 3, wherein the described a plurality of light-emitting components in each described optical coupling unit are enclosed in the side of this optically-coupled material equally spacedly.
5. backlight module as claimed in claim 4, wherein the side of this optically-coupled material is provided with a plurality of grooves equally spacedly, and described a plurality of light-emitting components are arranged in described a plurality of groove.
6. backlight module as claimed in claim 4, wherein this light-emitting component is a light emitting diode, the quantity of the described a plurality of light emitting diodes in each described optical coupling unit is more than or equal to four.
7. backlight module as claimed in claim 1, wherein this optically-coupled material is shaped as polygon.
8. backlight module as claimed in claim 1, wherein this LGP is one-body molded.
9. backlight module as claimed in claim 1, wherein the refractive index of this optically-coupled material is different with the refractive index of this LGP.
10. backlight module as claimed in claim 9, wherein the refractive index of the refractive index of this optically-coupled material or this LGP equals the refractive index of this optical cement.
11. backlight module as claimed in claim 1, wherein the refractive index of the refractive index of this LGP, this optical cement is all identical with the refractive index of this optically-coupled material.
12. backlight module as claimed in claim 1, also comprise a circuit board, be arranged at the below of this optically-coupled material, this circuit board surface comprises one first district and one second district, this first district is provided with described a plurality of light-emitting component, this second district then is provided with a reflecting layer, and the lower surface of described optically-coupled material contacts this reflecting layer.
13. backlight module as claimed in claim 1, wherein said a plurality of optical coupling units are arrayed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105349720A CN102109130A (en) | 2010-11-01 | 2010-11-01 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105349720A CN102109130A (en) | 2010-11-01 | 2010-11-01 | Backlight module |
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| Publication Number | Publication Date |
|---|---|
| CN102109130A true CN102109130A (en) | 2011-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105349720A Pending CN102109130A (en) | 2010-11-01 | 2010-11-01 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102109130A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021731A (en) * | 2013-03-01 | 2014-09-03 | 群创光电股份有限公司 | Display device |
| CN105891940A (en) * | 2016-06-21 | 2016-08-24 | 京东方科技集团股份有限公司 | Light guide plate, backlight source module and display device |
| WO2019007079A1 (en) * | 2017-07-03 | 2019-01-10 | 京东方科技集团股份有限公司 | Light guide assembly, backlight module and display device |
| CN113570976A (en) * | 2021-07-16 | 2021-10-29 | 彼博股份有限公司 | Curved surface integrated imaging display device and manufacturing method thereof |
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| CN1558283A (en) * | 2004-01-30 | 2004-12-29 | 友达光电股份有限公司 | Backlight module |
| CN1564069A (en) * | 2004-04-21 | 2005-01-12 | 友达光电股份有限公司 | Backlight assembly |
| CN1687826A (en) * | 2005-05-30 | 2005-10-26 | 友达光电股份有限公司 | Backlight structure |
| US20070091222A1 (en) * | 2005-10-24 | 2007-04-26 | Lg Philips Lcd Co., Ltd. | Backlight unit and liquid crystal display module using the same |
| CN1996122A (en) * | 2006-12-28 | 2007-07-11 | 友达光电股份有限公司 | Back light module |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1439959A (en) * | 2002-02-22 | 2003-09-03 | 友达光电股份有限公司 | Background module set of thin film liquid crystal display device |
| CN1558283A (en) * | 2004-01-30 | 2004-12-29 | 友达光电股份有限公司 | Backlight module |
| CN1564069A (en) * | 2004-04-21 | 2005-01-12 | 友达光电股份有限公司 | Backlight assembly |
| CN1687826A (en) * | 2005-05-30 | 2005-10-26 | 友达光电股份有限公司 | Backlight structure |
| US20070091222A1 (en) * | 2005-10-24 | 2007-04-26 | Lg Philips Lcd Co., Ltd. | Backlight unit and liquid crystal display module using the same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021731A (en) * | 2013-03-01 | 2014-09-03 | 群创光电股份有限公司 | Display device |
| CN105891940A (en) * | 2016-06-21 | 2016-08-24 | 京东方科技集团股份有限公司 | Light guide plate, backlight source module and display device |
| WO2019007079A1 (en) * | 2017-07-03 | 2019-01-10 | 京东方科技集团股份有限公司 | Light guide assembly, backlight module and display device |
| US11280952B2 (en) | 2017-07-03 | 2022-03-22 | Beijing Boe Display Technology Co., Ltd. | Light guide component, backlight module and display device |
| CN113570976A (en) * | 2021-07-16 | 2021-10-29 | 彼博股份有限公司 | Curved surface integrated imaging display device and manufacturing method thereof |
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Application publication date: 20110629 |