CN100403128C - Backlight module and light diffusion assembly - Google Patents
Backlight module and light diffusion assembly Download PDFInfo
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- CN100403128C CN100403128C CNB2006100067702A CN200610006770A CN100403128C CN 100403128 C CN100403128 C CN 100403128C CN B2006100067702 A CNB2006100067702 A CN B2006100067702A CN 200610006770 A CN200610006770 A CN 200610006770A CN 100403128 C CN100403128 C CN 100403128C
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- incidence surface
- light
- backlight module
- photodiffusion component
- photodiffusion
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- 238000009792 diffusion process Methods 0.000 title claims abstract description 41
- 230000001154 acute effect Effects 0.000 claims description 18
- 230000000994 depressogenic effect Effects 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 229920000515 polycarbonate Polymers 0.000 claims description 5
- 239000004417 polycarbonate Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 230000000712 assembly Effects 0.000 abstract description 4
- 238000000429 assembly Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 7
- 230000004907 flux Effects 0.000 description 2
- 240000003380 Passiflora rubra Species 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The present invention relates to a backlight module and light diffusion assemblies. The backlight module comprises a light guide plate, a plurality of point-shaped light sources and a plurality of light diffusion assemblies, wherein the light guide plate is provided with a light incident surface; the point-shaped light sources are adjacent to the light incident surface; the light diffusion assemblies are arranged among the light guide plate and the point-shaped light sources in the way of respectively corresponding to the point-shaped light sources.
Description
Technical field
The present invention relates to a kind of backlight module and Photodiffusion component, particularly relate to a kind of backlight module and Photodiffusion component that reduces the unevenness of bright blanking bar.
Background technology
In known backlight module, when utilizing point source of light as light emitting diode (LED) etc. to cooperate with light guide plate, because the characteristic of the distribution curve flux (directivity) of LED itself causes two mixed lights between the adjacent light source not good, form the bright blanking bar that light and shade replaces.More obvious when particularly point source of light being used to have the light guide plate of V-type light entrance structures thereof (V-cut).
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of backlight module and Photodiffusion component, particularly about a kind of backlight module and Photodiffusion component that reduces the unevenness of bright blanking bar.
According to the present invention, a kind of backlight module is provided, comprise a light guide plate, a plurality of point source of light and a plurality of Photodiffusion component, wherein light guide plate has one first incidence surface, a plurality of point source of lights are adjacent to first incidence surface, and a plurality of Photodiffusion components then are arranged between light guide plate and the point source of light in corresponding with point source of light respectively mode.
In a preferred embodiment, Photodiffusion component comprises two diffusion parts respectively, and with respect to the normal direction of first incidence surface for being mutually symmetrical.Wherein diffusion part comprises an exiting surface and one second incidence surface respectively, exiting surface is in the face of first incidence surface, and and folded acute angle is less than 35 degree between first incidence surface, and second incidence surface is in the face of point source of light, and and the parallel line of first incidence surface between folded acute angle greater than 70 degree.
In another preferred embodiment, Photodiffusion component comprises two diffusion parts respectively, and wherein diffusion part is essentially triangle, and with respect to the normal direction of first incidence surface for being mutually symmetrical, triangle is that the mode with the diagonal angle, angle connects.In addition, diffusion part comprises an exiting surface and one second incidence surface respectively, and exiting surface is in the face of first incidence surface, and and first incidence surface between folded acute angle less than 35 degree.Second incidence surface is in the face of point source of light, and and the parallel line of first incidence surface between folded acute angle greater than 70 degree.
It should be noted that Photodiffusion component can be made by silicon, polycarbonate or resin respectively, can make by pressing mold or injection.In addition, Photodiffusion component can be separately positioned on the point source of light, or is attached to respectively on first incidence surface.In addition, point source of light can be respectively light emitting diode.
In another preferred embodiment, have a plurality of depressed parts on first incidence surface, Photodiffusion component is separately positioned in the depressed part.
In addition in the present invention, a kind of Photodiffusion component is provided, comprise two diffusion parts, wherein diffusion part is mutually symmetrical with respect to a center line, and comprise an exiting surface and an incidence surface respectively, acute angle folded between the perpendicular line of exiting surface and center line is less than 35 degree, and acute angle folded between the perpendicular line of incidence surface and center line is greater than 70 degree.
In addition in the present invention, provide another kind of Photodiffusion component, comprise two diffusion parts, wherein diffusion part is essentially triangle, and is mutually symmetrical with respect to a center line, and triangle is that the mode with the diagonal angle, angle connects.
For making above-mentioned and other purpose of the present invention, feature and advantage can more obvious easy to understand, below especially exemplified by a concrete preferred embodiment, and conjunction with figs. elaborates.
Description of drawings
Fig. 1 is the synoptic diagram of an embodiment of backlight module of the present invention;
Fig. 2 is the synoptic diagram of the Photodiffusion component among Fig. 1;
Fig. 3 a is the synoptic diagram of the variation of Photodiffusion component of the present invention;
Fig. 3 b is the synoptic diagram of another variation of Photodiffusion component of the present invention;
Fig. 3 c is the synoptic diagram of another variation of Photodiffusion component of the present invention;
Fig. 4 a is the synoptic diagram of another embodiment of backlight module of the present invention; And
Fig. 4 b is the synoptic diagram of another embodiment of backlight module of the present invention.
Embodiment
With reference to figure 1, backlight module 1 of the present invention comprises a light guide plate 10, a plurality of point source of light 20 and a plurality of Photodiffusion component 30.In the accompanying drawings, the quantity of point source of light 20 and Photodiffusion component 30 is respectively two, but is not limited to this, can according to circumstances adjust quantity is set.In addition, in backlight module 1, also be provided with other assemblies such as blooming piece, but since with the known backlit module class like and more uncorrelated with the present invention, omit its explanation at this.
Each Photodiffusion component 30 is corresponding with in the point source of light 20 any respectively, and is set on the corresponding point source of light 20, and between light guide plate 10 and point source of light 20.With reference to figure 2, each Photodiffusion component 30 comprises two diffusion parts 31 respectively, and with respect to a center line P for being mutually symmetrical.Wherein each diffusion part 31 comprises an exiting surface 32 and one second incidence surface 33 respectively, and the exiting surface of diffusion part 31 32 is in the face of first incidence surface 11 of light guide plate 10, and and a separator bar (being the perpendicular line of center line P) H between folded acute angle spend less than 35.Relatively, second incidence surface 33 of diffusion part 31 is in the face of point source of light 20, and and separator bar H between folded acute angle greater than 70 degree.
Will be appreciated that center line P is positioned on the normal direction of first incidence surface 11 of light guide plate 10, that is, two diffusion parts 31 with respect to the normal direction of first incidence surface 11 of light guide plate 10 for being mutually symmetrical.In addition, separator bar H is parallel with first incidence surface 11 of light guide plate 10, that is, folded acute angle also is less than 35 degree between first incidence surface 11 of the exiting surface 32 of diffusion part 31 and light guide plate 10.In addition, separator bar H also can be described as the parallel line of first incidence surface 11 of light guide plate 10, that is, folded acute angle also is greater than 70 degree between the parallel line of second incidence surface 33 of diffusion part 31 and first incidence surface 11 of light guide plate 10.
In addition, it should be noted, though in Fig. 2, the shape of two diffusion parts 31 of Photodiffusion component 30 is essentially triangle, and triangle is that the mode with the diagonal angle, angle connects, and between two triangles, have a connecting portion 34 therebetween, but be not limited to this, as long as the angular relationship in the diffusion part is according to the previous description.For example, shown in the Photodiffusion component 30a of Fig. 3 a, two diffusion parts are directly to link to each other.Perhaps, shown in the Photodiffusion component 30b of Fig. 3 b, the surface that two diffusion parts do not link to each other is a cambered surface.Perhaps, shown in the Photodiffusion component 30c of Fig. 3 c, two diffusion parts come down to a quadrilateral.In addition, in the accompanying drawings, the exiting surface 32 of Photodiffusion component 30 and second incidence surface 33 are a plane, but are not limited to this, also can be convex-concave surfaces, as long as the angular relationship in the diffusion part is according to the previous description.
In addition, Photodiffusion component can be made by silicon, polycarbonate or resin respectively, and can be made by modes such as pressing mold or injections.
In addition, in Fig. 2,, be not limited to this though the set-up mode of each Photodiffusion component 30 is set on the corresponding point source of light 20.For example, shown in the backlight module 1a of Fig. 4 a, Photodiffusion component 30 is attached at respectively on first incidence surface 11 of light guide plate 10.Perhaps, shown in the backlight module 1b of Fig. 4 b, have a plurality of depressed parts 12 on first incidence surface 11 ' of light guide plate 10 ', and Photodiffusion component 30 is separately positioned in the depressed part 12.
The present inventor shows that with the optics simulation result Photodiffusion component of the present invention can effectively improve the staggered bright blanking bar problem of light and shade really, can improve the homogeneity of light-emitting area.
As mentioned above, Photodiffusion component of the present invention can change point source of light and enter distribution curve flux before the light guide plate, makes light enter after the light guide plate effectively mixed light, with the unevenness of the staggered bright blanking bar of effective reduction light and shade.
Though the present invention discloses with preferred embodiment; but it is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; can make a little change and retouching, so protection scope of the present invention is defined with the accompanying Claim scope.
Claims (18)
1. backlight module comprises:
One light guide plate has one first incidence surface;
A plurality of point source of lights are adjacent to described first incidence surface; And
A plurality of Photodiffusion components, be arranged between described light guide plate and the described point source of light in corresponding with described point source of light respectively mode, wherein said Photodiffusion component comprises two diffusion parts respectively, diffusion part is essentially triangle, and the normal with respect to first incidence surface is mutually symmetrical, triangle connects in the mode at diagonal angle, angle, and described diffusion part comprises one second incidence surface respectively, second incidence surface is in the face of point source of light, and and the parallel line of first incidence surface between folded acute angle greater than 70 degree.
2. backlight module as claimed in claim 1, wherein said diffusion part comprises an exiting surface respectively, exiting surface is in the face of first incidence surface, and and first incidence surface between folded acute angle less than 35 degree.
3. backlight module as claimed in claim 1, wherein said Photodiffusion component is made by silicon, polycarbonate or resin.
4. backlight module as claimed in claim 1, wherein said Photodiffusion component is made by pressing mold or injection.
5. backlight module as claimed in claim 1, wherein said Photodiffusion component is separately positioned on the point source of light.
6. backlight module as claimed in claim 1, wherein said Photodiffusion component is attached to respectively on first incidence surface.
7. backlight module as claimed in claim 1 has a plurality of depressed parts on wherein said first incidence surface, and Photodiffusion component is separately positioned in the depressed part.
8. backlight module as claimed in claim 1, wherein said point source of light is respectively light emitting diode.
9. Photodiffusion component, comprise two diffusion parts, wherein said diffusion part is mutually symmetrical with respect to a center line, and comprise an exiting surface and an incidence surface respectively, acute angle folded between the perpendicular line of described exiting surface and described center line is less than 35 degree, and folded acute angle is spent greater than 70 between the perpendicular line of described incidence surface and described center line.
10. Photodiffusion component as claimed in claim 9, wherein said Photodiffusion component is made by silicon, polycarbonate or resin.
11. Photodiffusion component as claimed in claim 9, wherein said Photodiffusion component is made by pressing mold or injection.
12. Photodiffusion component, comprise two diffusion parts, wherein said diffusion part is essentially triangle, and be mutually symmetrical with respect to a center line, described triangle connects in the mode at diagonal angle, angle, wherein said diffusion part comprises an incidence surface respectively, and and the perpendicular line of center line between folded acute angle greater than 70 degree.
13. Photodiffusion component as claimed in claim 12, wherein said diffusion part comprises an exiting surface respectively, and and the perpendicular line of center line between folded acute angle less than 35 degree.
14. Photodiffusion component as claimed in claim 12, wherein said Photodiffusion component is made by silicon, polycarbonate or resin.
15. Photodiffusion component as claimed in claim 12, wherein said Photodiffusion component is made by pressing mold or injection.
16. a backlight module comprises:
One light guide plate has one first incidence surface;
A plurality of point source of lights are adjacent to described first incidence surface; And
A plurality of Photodiffusion components, be arranged between described light guide plate and the described point source of light in corresponding with described point source of light respectively mode, wherein said Photodiffusion component comprises two diffusion parts respectively, and described two diffusion parts are mutually symmetrical with respect to the normal of first incidence surface, diffusion part comprises one second incidence surface respectively, second incidence surface is in the face of point source of light, and and the parallel line of first incidence surface between folded acute angle greater than 70 degree.
17. backlight module as claimed in claim 16, wherein said diffusion part comprises an exiting surface respectively, and exiting surface is in the face of first incidence surface, and and first incidence surface between folded acute angle less than 35 degree.
18. backlight module as claimed in claim 16, wherein said diffusion part is essentially triangle, and is mutually symmetrical with respect to the normal of first incidence surface, and triangle connects in the mode at diagonal angle, angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100067702A CN100403128C (en) | 2006-02-08 | 2006-02-08 | Backlight module and light diffusion assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100067702A CN100403128C (en) | 2006-02-08 | 2006-02-08 | Backlight module and light diffusion assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1808245A CN1808245A (en) | 2006-07-26 |
| CN100403128C true CN100403128C (en) | 2008-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100067702A Expired - Fee Related CN100403128C (en) | 2006-02-08 | 2006-02-08 | Backlight module and light diffusion assembly |
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| Country | Link |
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| CN (1) | CN100403128C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922680B (en) * | 2009-03-02 | 2012-10-03 | 友达光电股份有限公司 | Light guide plate with V-shaped structures and backlight module comprising same |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6445518B1 (en) * | 2000-11-28 | 2002-09-03 | Semiconductor Technologies & Instruments, Inc. | Three dimensional lead inspection system |
| US6679621B2 (en) * | 2002-06-24 | 2004-01-20 | Lumileds Lighting U.S., Llc | Side emitting LED and lens |
| US20040130515A1 (en) * | 2003-01-06 | 2004-07-08 | Toppoly Optoelectronics Corp. | Planar display structure with LED light source |
| JP2004302067A (en) * | 2003-03-31 | 2004-10-28 | Toyota Industries Corp | Light guide plate, lighting device, and liquid crystal display device |
| CN1658045A (en) * | 2005-04-01 | 2005-08-24 | 友达光电股份有限公司 | Down backlight unit structure |
| CN1670585A (en) * | 2004-03-15 | 2005-09-21 | 统宝光电股份有限公司 | Backlight module |
| CN1687831A (en) * | 2005-05-27 | 2005-10-26 | 友达光电股份有限公司 | Backlight module and lighting device thereof |
| US6974229B2 (en) * | 2003-05-21 | 2005-12-13 | Lumileds Lighting U.S., Llc | Devices for creating brightness profiles |
-
2006
- 2006-02-08 CN CNB2006100067702A patent/CN100403128C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6445518B1 (en) * | 2000-11-28 | 2002-09-03 | Semiconductor Technologies & Instruments, Inc. | Three dimensional lead inspection system |
| US6679621B2 (en) * | 2002-06-24 | 2004-01-20 | Lumileds Lighting U.S., Llc | Side emitting LED and lens |
| US20040130515A1 (en) * | 2003-01-06 | 2004-07-08 | Toppoly Optoelectronics Corp. | Planar display structure with LED light source |
| JP2004302067A (en) * | 2003-03-31 | 2004-10-28 | Toyota Industries Corp | Light guide plate, lighting device, and liquid crystal display device |
| US6974229B2 (en) * | 2003-05-21 | 2005-12-13 | Lumileds Lighting U.S., Llc | Devices for creating brightness profiles |
| CN1670585A (en) * | 2004-03-15 | 2005-09-21 | 统宝光电股份有限公司 | Backlight module |
| CN1658045A (en) * | 2005-04-01 | 2005-08-24 | 友达光电股份有限公司 | Down backlight unit structure |
| CN1687831A (en) * | 2005-05-27 | 2005-10-26 | 友达光电股份有限公司 | Backlight module and lighting device thereof |
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| Publication number | Publication date |
|---|---|
| CN1808245A (en) | 2006-07-26 |
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Granted publication date: 20080716 |