CN101806428B - Light guide plate - Google Patents
Light guide plate Download PDFInfo
- Publication number
- CN101806428B CN101806428B CN2009100072600A CN200910007260A CN101806428B CN 101806428 B CN101806428 B CN 101806428B CN 2009100072600 A CN2009100072600 A CN 2009100072600A CN 200910007260 A CN200910007260 A CN 200910007260A CN 101806428 B CN101806428 B CN 101806428B
- Authority
- CN
- China
- Prior art keywords
- lgp
- reflective particle
- light
- shell
- base material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Optical Elements Other Than Lenses (AREA)
Abstract
The invention relates to a light guide plate which is characterized by comprising a base material and a plurality of reflection particles, wherein the base material is made from thermoplastic plastics; the reflection particles are spread in the base material, and the average particle diameter is 0.1 mum to 100 mum; each reflection particle is respectively provided with a core and a shell made from metallic oxides including Al2O3,ZnO or ZrO2 and the like; the core is made from SiO2 or TiO2 or materials the same as that of the shell. Therefore, the light guide plate has high light transmittance, can also uniformly spread light rays sent from a light source, and can be used for replacing combination of the conventional light guide plates and diffusion plates.
Description
Technical field
The present invention is relevant with LGP, is meant the LGP that a kind of transmittance is high and can the light that light source sent evenly be spread especially.
Background technology
The general employed backlight module of LCD consists predominantly of light source, LGP, reflecting plate, diffuser plate, brightness enhancement film and polarisation conversion film; Wherein, The major function of LGP is the directing light direction, and is even to improve the panel light briliancy and to control brightness, and reflecting plate is used for preventing that LGP bottom light from leaking outside; To increase the service efficiency of light, the function of diffuser plate is that the light that LGP is penetrated diffuses into a uniform surface light source.
Traditional LGP is that method with ejection formation is with polymethylmethacrylate (polymethylmethacrylate; PMMA) process ganoid plate; Apparatus high reflectance and the not material of extinction then stamp circular or square diffusion point at bottom surface of light guide plate with screen painting, when light source places the LGP side; These diffusion points can be with upwards reflection of light; Light is penetrated by the LGP end face, but even inadequately by the light of LGP end face ejaculation, need could form uniform area light source through the effect of diffuser plate.
Because LGP and diffuser plate are the significant components that influences the backlight module optical efficiency, have become industry and have demanded researching and developing improved target for a long time urgently.
Summary of the invention
To the problems referred to above, fundamental purpose of the present invention is to provide a kind of LGP, and its transmittance is high, can the light that light source sent evenly be spread simultaneously.
For achieving the above object, a kind of LGP provided by the present invention is characterized in that comprising: a base material, and made by thermoplastics; A most reflective particle intersperse among in the said base material, and mean grain size is 0.1 μ m～100 μ m, and each said reflective particle has a core and a shell respectively, and said shell is by Al
2O
3, B
2O
3, BaCO
3, Bi
2O
3, CaCO
3, CeO
2, Cr
2O
3, CoO, Co
3O
4, CuO, Dy
2O
3, Er
2O
3, Eu
2O
3, Fe
2O
3, Ga
2O
3, Ge
2O
3, Gd
2O
3, HfO
2, Ho
2O
3, In
2O
3, K
2O
3, La
2O
3, Li
2CO
3, MgO, MgCO
3, Mn
2O
3, Mn
3O
4, MoO
3, Nb
2O
5, Nd
2O
3, NiO, PbO, Pb
3O
4, Pr
6O
11, Sb
2O
3, SiO
2, Sm
2O
3, SnO
2, SrCO
3, Ta
2O
5, Tb
4O
7, TeO
2, WO
3, V
2O
5, Y
2O
3, Yb
2O
3, ZnO or ZrO
2Made.
In the technical scheme of the invention described above, said core is by SiO
2Or TiO
2Made.
The average thickness of said shell is 0.05 μ m～50 μ m.
Said core is made by identical material with said shell.
The mean grain size of each said reflective particle is 1 μ m～10 μ m.
The mean grain size of each said reflective particle is 3 μ m～5 μ m.
The weight of each said reflective particle is 0.1～20% of said LGP weight.
Each said reflective particle is spherical in shape approximately.
Adopt technique scheme; The present invention is owing to be provided with most reflective particle in LGP inside; When light is got into by LGP side or bottom surface; Light is reflected towards all directions by these reflective particle, and forms a uniform surface light source at the LGP end face, makes LGP have the function of diffusion light concurrently.Moreover, because the particle diameter of these reflective particle is minimum, influence the transmittance of LGP hardly, do not see the difference with pure PMMA plate fully by naked eyes.Thus, the combination of LGP instead tradition LGP of the present invention and diffuser plate reduces the light loss between traditional LGP and diffuser plate, and improves briliancy and uniformity coefficient.
Description of drawings
Fig. 1 is the synoptic diagram of the present invention's one preferred embodiment.
Embodiment
Lift following examples at present and combine accompanying drawing that structure of the present invention and effect are elaborated.
As shown in Figure 1, the LGP 10 that the present invention's one preferred embodiment is provided includes a base material 12 and most reflective particle 14.
Each reflective particle 14 is spherical in shape and intersperse among equably in the base material 12; Analysis result according to HORIBA LB-500 high concentration ultra micro particle diameter distributional analysis appearance (dynamic light scattering submicron particle size distributionanalyzer); The mean grain size of each reflective particle 14 is about 3 μ m～5 μ m; Each reflective particle 14 has a core 16 and a shell 18 respectively, and core 16 is by SiO
2Made, 18 of shells are by Al
2O
3Made, the average thickness of shell 18 is about 1.5 μ m～2.5 μ m, and the weight of each reflective particle 14 is about 1% of LGP 10 weight.
During actual the manufacturing; To grind the reflective particle of accomplishing 14 earlier evenly is dispersed in the methyl methacrylate oligomer; Utilize the pouring type moulding again; Under suitable temperature, make simultaneously the further polymerization of methyl methacrylate form polymethylmethacrylate (PMMA), can form the LGP 10 that inside has most reflective particle 14.
Because LGP of the present invention 10 inside have most reflective particle 14; When light was got into by LGP side or bottom surface, light was reflected towards all directions by these reflective particle 14, and forms a uniform surface light source at LGP 10 end faces; Make LGP 10 have the function of diffusion light concurrently; If light source 20 is located at LGP 10 sides, then a reflecting plate 22 can be established in LGP 10 bottom sides, is used to avoid light to spill (as shown in Figure 1) by LGP 10 bottoms.Moreover, because the particle diameter of these reflective particle 14 is minimum, influence the transmittance of LGP 10 hardly, do not see the difference with pure PMMA plate fully by naked eyes.Thus, the combination of LGP 10 instead tradition LGP of the present invention and diffuser plate reduces the light loss between traditional LGP and diffuser plate, and improves briliancy and uniformity coefficient.
Based on spirit of the present invention; The composition of LGP, the composition of reflective particle or size all can change; Further experiment shows: the mean grain size of reflective particle all can at 0.1 μ m～100 μ m; Preferable with 1 μ m～10 μ m, the average thickness of shell 18 0.05 μ m～50 μ m also can, shell 18 can be by other metal oxide such as B
2O
3, BaCO
3, Bi
2O
3, CaCO
3, CeO
2, Cr
2O
3, CoO, Co
3O
4, CuO, Dy
2O
3, Er
2O
3, Eu
2O
3, Fe
2O
3, Ga
2O
3, Ge
2O
3, Gd
2O
3, HfO
2, Ho
2O
3, In
2O
3, K
2O
3, La
2O
3, Li
2CO
3, MgO, MgCO
3, Mn
2O
3, Mn
3O
4, MoO
3, Nb
2O
5, Nd
2O
3, NiO, PbO, Pb
3O
4, Pr
6O
11, Sb
2O
3, SiO
2, Sm
2O
3, SnO
2, SrCO
3, Ta
2O
5, Tb
4O
7, TeO
2, WO
3, V
2O
5, Y
2O
3, Yb
2O
3, ZnO or ZrO
2Made.16 of cores can be by SiO
2, TiO
2Or made with shell 18 identical materials, the weight of each reflective particle 14 can be 0.1～20% of LGP 10 weight.Such as these easy full of beard and variation, all should be claim of the present invention and contain.
Claims (8)
1. LGP is characterized in that comprising:
One base material, made by thermoplastics;
A most reflective particle intersperse among in the said base material, and mean grain size is 0.1 μ m～100 μ m, and each said reflective particle has a core and a shell respectively, and said shell is by Al
2O
3, B
2O
3, BaCO
3, CaCO
3, CeO
2, Cr
2O
3, MgO, MgCO
3, SiO
2, SnO
2Or ZrO
2Made.
2. LGP as claimed in claim 1 is characterized in that: said core is by SiO
2Or TiO
2Made.
3. LGP as claimed in claim 2 is characterized in that: the average thickness of said shell is 0.05 μ m～50 μ m.
4. LGP as claimed in claim 1 is characterized in that: said core is made by identical material with said shell.
5. LGP as claimed in claim 1 is characterized in that: the mean grain size of each said reflective particle is 1 μ m～10 μ m.
6. LGP as claimed in claim 1 is characterized in that: the mean grain size of each said reflective particle is 3 μ m～5 μ m.
7. LGP as claimed in claim 1 is characterized in that: the weight of each said reflective particle is 0.1～20% of said LGP weight.
8. LGP as claimed in claim 1 is characterized in that: each said reflective particle is spherical in shape approximately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100072600A CN101806428B (en) | 2009-02-17 | 2009-02-17 | Light guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100072600A CN101806428B (en) | 2009-02-17 | 2009-02-17 | Light guide plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101806428A CN101806428A (en) | 2010-08-18 |
| CN101806428B true CN101806428B (en) | 2012-01-18 |
Family
ID=42608326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100072600A Expired - Fee Related CN101806428B (en) | 2009-02-17 | 2009-02-17 | Light guide plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101806428B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182964A (en) * | 2011-04-29 | 2011-09-14 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN103322440B (en) * | 2012-03-23 | 2015-06-03 | 潘文莘 | Luminous module changing light advancing path through interior reflection |
| KR20140020493A (en) * | 2012-08-08 | 2014-02-19 | 삼성디스플레이 주식회사 | Light guide plate and manufacturing method of the same |
| CN103923418B (en) * | 2014-05-06 | 2016-02-03 | 南京信息工程大学 | A kind of high ultraviolet absorption ability material and preparation method thereof |
| CN113979747A (en) * | 2021-11-18 | 2022-01-28 | 厦门乃尔电子有限公司 | Modified lead zirconate titanate piezoelectric ceramic with additional bismuth antimonate and preparation method thereof |
| CN115903121A (en) * | 2022-11-22 | 2023-04-04 | 喜洋阳(南京)科技发展有限公司 | Rayleigh scattering light guide plate and manufacturing method thereof |
| CN116482894A (en) * | 2023-04-20 | 2023-07-25 | 苏州桐力光电股份有限公司 | Display module |
-
2009
- 2009-02-17 CN CN2009100072600A patent/CN101806428B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101806428A (en) | 2010-08-18 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20160217 |