CN101738655A - Diffusion sheet and manufacture method thereof - Google Patents
Diffusion sheet and manufacture method thereof Download PDFInfo
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- CN101738655A CN101738655A CN200810305609A CN200810305609A CN101738655A CN 101738655 A CN101738655 A CN 101738655A CN 200810305609 A CN200810305609 A CN 200810305609A CN 200810305609 A CN200810305609 A CN 200810305609A CN 101738655 A CN101738655 A CN 101738655A
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- diffusion sheet
- diffusion
- manufacture method
- printing opacity
- diffusion layer
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Abstract
The invention provides a diffusion sheet comprising a transparent substrate and a diffusion layer formed on the light penetration substrate, and the diffusion layer is a titanium oxide film layer with a porous structure. The invention further provides a manufacture method of the diffusion sheet, comprising the following steps of: providing the transparent substrate and titanium n-butoxide solution; and coating the titanium n-butoxide solution on the transparent substrate by utilizing a sol-gel method and forming the diffusion layer of a porous titanium oxide film. The titanium oxide film layer prepared by utilizing the sol-gel method is used as the diffusion layer, large-sized roasting equipment is not needed, and the volume production cost is lower.
Description
Technical field
The present invention relates to module backlight field, relate in particular to a kind of diffusion sheet and manufacture method thereof.
Background technology
Module backlight (back light module) is one of critical component of LCD panel.Because liquid crystal itself can't be luminous voluntarily, so the major function of module backlight is for liquid crystal panel provides the light source that brightness is sufficient and be evenly distributed, its ultimate principle be will be commonly used pointolite or the linear light sources area source product that is converted into high brightness, briliancy homogeneous by optical facilities.
Module backlight can be divided into two kinds of straight-down negative and side-light types by its structure.For these two kinds of modules backlight, in order effectively to eliminate the staggered or site phenomenon of light and shade, must diffusion barrier be set above light guide plate, with equalizing light rays, thereby provide uniform surface light source for the LCD panel.
Traditional diffusion barrier be on transparent substrate the coating resin cement and as the chemical particle of granule proliferation to form diffusion layer, when this diffusion layer of optical fiber process, produce refraction, reflection and scattering because of refractive index is different, can effectively spread light, and then reach the effect of equalizing light rays.But the optics diffusion particle is difficult for evenly diffusion in solvent type resin, and needs the equipment of large-scale baking of resin during volume production, and cost is higher.
Summary of the invention
In view of this, be necessary to provide lower-cost diffusion sheet of a kind of volume production and manufacture method thereof.
A kind of diffusion sheet, it comprises a printing opacity substrate, and one is formed at the on-chip diffusion layer of this printing opacity, it is characterized in that, and this diffusion layer is one to have the titanium oxide film layer of porous structure.
A kind of manufacture method of diffusion sheet, it may further comprise the steps: a printing opacity substrate and a normal butyl alcohol titanium solution are provided; Utilize sol-gal process to apply this normal butyl alcohol titanium solution, form the diffusion layer of a poriferous titanium dioxide film at this printing opacity substrate.
Compared to prior art, the titanium oxide film layer of using Prepared by Sol Gel Method does not need large-scale roasting plant as diffusion layer, and the volume production cost is lower.
Description of drawings
Fig. 1 is the cross-sectional schematic of the diffusion sheet that provides of the embodiment of the invention.
Fig. 2 is the schematic flow sheet of the manufacture method of the diffusion sheet that provides of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the invention is described in further detail.
See also Fig. 1, the embodiment of the invention provides a kind of diffusion sheet 100, and it comprises that a printing opacity substrate 20, is formed at the diffusion layer 40 on this printing opacity substrate 20, and this diffusion layer 40 is one to have the titanium oxide film layer of porous structure.
The material of this printing opacity substrate 20 is polymethylmethacrylate (Polymethyl Methacrylate, PMMA), polycarbonate (Polycarbonate, PC) or polyethylene terephthalate (Polythylene Terephthalate, PET), in the present embodiment, the material selection PET of this printing opacity substrate 20.The thickness of this printing opacity substrate 20 is 10 microns to 250 microns.
In the porous structure of this titanium oxide film layer, this hole (figure do not show) is shaped as spherical shape, and the diameter in this hole is 50 to 200 nanometers.The thickness of this diffusion layer 40 is 50 to 250 nanometers.
See also Fig. 2, the embodiment of the invention provides the method for making of this diffusion sheet 100, and it may further comprise the steps:
The first step provides a printing opacity substrate and a normal butyl alcohol titanium solution.
Second step, utilize sol-gal process on this printing opacity substrate, to apply this normal butyl alcohol titanium solution, form the diffusion layer of a poriferous titanium dioxide film.
The solvent of this normal butyl alcohol titanium solution is a n-propanol, and the concentration ratio of this normal butyl alcohol titanium and n-propanol is 1: 10.The collosol and gel ratio juris is that the normal butyl alcohol titanium solution is applied this printing opacity substrate 20 surfaces, and at the printing opacity substrate 20 surface glues film that congeals into, drying again can obtain the diffusion layer 40 of poriferous titanium dioxide film through hydrolysis and polycondensation reaction etc.This painting method can be centrifugal rotary process, dip-coating method or metallikon.In the present embodiment, painting method is a dip-coating method; Chemical reaction such as hydrolysis, polycondensation carries out in humidity is 30% to 50% steam atmosphere; Baking temperature is 25 to 80 degrees centigrade.
This diffusion layer 40 is one to have even and fine and close poriferous titanium dioxide rete, and when making light through this rete, light reflects in fenestra, presents the uniform bright dipping of diffusion.
Compared to prior art, use the titanium oxide film layer of sol-gal process preparation as diffusion layer 40, do not need large-scale roasting plant, the volume production cost is lower.
In addition, those skilled in the art can also do other variation in spirit of the present invention, are understandable that the variation that these are done according to spirit of the present invention all should be included in the present invention's range required for protection.
Claims (10)
1. diffusion sheet, it comprises a printing opacity substrate, and one is formed at the on-chip diffusion layer of this printing opacity, it is characterized in that, and this diffusion layer is one to have the titanium oxide film layer of porous structure.
2. diffusion sheet as claimed in claim 1 is characterized in that, this hole be shaped as spherical shape.
3. diffusion sheet as claimed in claim 1 is characterized in that, the diameter in this hole is 50 to 200 nanometers.
4. diffusion sheet as claimed in claim 1 is characterized in that, the thickness of this diffusion layer is 50 to 250 nanometers.
5. diffusion sheet as claimed in claim 1 is characterized in that, the material of this printing opacity substrate is polymethylmethacrylate, polycarbonate or polyethylene terephthalate.
6. the manufacture method of a diffusion sheet as claimed in claim 1, it may further comprise the steps:
An one printing opacity substrate and a normal butyl alcohol titanium solution are provided;
Utilize sol-gal process on this printing opacity substrate, to apply this normal butyl alcohol titanium solution, form the diffusion layer of a poriferous titanium dioxide film.
7. the manufacture method of diffusion sheet as claimed in claim 6 is characterized in that, the solvent of this normal butyl alcohol titanium solution is a n-propanol.
8. the manufacture method of diffusion sheet as claimed in claim 6 is characterized in that, the concentration ratio of this normal butyl alcohol titanium and n-propanol is 1: 10.
9. the manufacture method of diffusion sheet as claimed in claim 6 is characterized in that, this painting method is centrifugal rotary process, dip-coating method or metallikon.
10. the manufacture method of diffusion sheet as claimed in claim 6 is characterized in that, baking temperature is 25 to 80 degrees centigrade in the sol-gal process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810305609A CN101738655A (en) | 2008-11-18 | 2008-11-18 | Diffusion sheet and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810305609A CN101738655A (en) | 2008-11-18 | 2008-11-18 | Diffusion sheet and manufacture method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101738655A true CN101738655A (en) | 2010-06-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810305609A Pending CN101738655A (en) | 2008-11-18 | 2008-11-18 | Diffusion sheet and manufacture method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101738655A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115545A (en) * | 2011-01-30 | 2011-07-06 | 宁波东旭成化学有限公司 | Preparation method of optical diffusion film with middle hole |
| CN103197369A (en) * | 2010-11-23 | 2013-07-10 | 吴明番 | Special-shaped light conductor coating with optical film layers |
| CN109934157A (en) * | 2019-03-11 | 2019-06-25 | 深圳阜时科技有限公司 | A kind of backlight module, display device and electronic equipment |
-
2008
- 2008-11-18 CN CN200810305609A patent/CN101738655A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197369A (en) * | 2010-11-23 | 2013-07-10 | 吴明番 | Special-shaped light conductor coating with optical film layers |
| CN102115545A (en) * | 2011-01-30 | 2011-07-06 | 宁波东旭成化学有限公司 | Preparation method of optical diffusion film with middle hole |
| CN102115545B (en) * | 2011-01-30 | 2012-10-17 | 宁波东旭成化学有限公司 | Preparation method of optical diffusion film with middle hole |
| CN109934157A (en) * | 2019-03-11 | 2019-06-25 | 深圳阜时科技有限公司 | A kind of backlight module, display device and electronic equipment |
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Application publication date: 20100616 |