CN1629693A - Diffuser plate structure capable of increasing penetration rate - Google Patents
Diffuser plate structure capable of increasing penetration rate Download PDFInfo
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- CN1629693A CN1629693A CN 200310120616 CN200310120616A CN1629693A CN 1629693 A CN1629693 A CN 1629693A CN 200310120616 CN200310120616 CN 200310120616 CN 200310120616 A CN200310120616 A CN 200310120616A CN 1629693 A CN1629693 A CN 1629693A
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- penetrance
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Abstract
This invention provides a diffusion plate structure forming an anti-reflection layer with low reflection rate on the surface under it, which is a resinoid containing multiple nm particles mixed freely in the resinoid with alcohol as the solvent. When incident light passes through the film, it can increase its permeability since this anti-reflection layer has low reflection rate.
Description
Technical field
The present invention relates to a kind of diffusion board structure, particularly about a kind of structure that in liquid crystal indicator, can increase the diffuser plate of penetrance.
Background technology
(Liquid Crystal Display LCD) is non-self light-emitting display device to LCD, need just can reach the function of demonstration by means of backlight.Under fixing back light source system, the height of diffusion barrier transmittance can directly have influence on the effect of utilizing of light source, and then has influence on the LCD image display quality, and it is to be considerable parts in the module of LCD.High-quality, large-sized LCD, must there be high performance backlight technology to cooperate, therefore the high performance of backlight technology, for example high brightnessization, cost degradation, low consumption electrification, lightening or the like, it is playing the part of very important role in the performance of the overall performance of LCD.
Backlight module in the LCD generally comprises light source (being cold-cathode tube), reflecting plate, leaded light version and diffuser plate or the like, and wherein, the function of diffuser plate can effectively be disperseed incident light, and provides LCD a uniform surface light source.A traditional diffuser plate comprises a transparency carrier and a diffusion layer (diffusing layer), this diffusion layer is formed on the surface of transparency carrier, and this diffusion layer contains the ball-type material particle of scattering (scatters), and the diffusion effect of diffuser plate mainly is because the refractive index difference between scattering of bonding agent (binder) in the diffusion layer and filling causes.Scattering is dispersed between the diffusion layer, when light process diffusion layer, can constantly pass in the different medium of two refractive indexes, and this moment, light produced the phenomenon of refraction, reflection and scattering simultaneously, promptly caused the effect of optics diffusion.
Along with the fast development of flat-panel screens, high-quality demonstration image quality is occupied indispensable role, wherein, and the ring that the brightness of flat-panel screens performance is attached most importance to and wanted, and anti-reflective film is one of important use in promoting the brightness performance.The effect of anti-reflective film is to reduce reflection and the light penetration of increase display element, its principle mainly is to utilize when incident wavelength to have the characteristic that penetrates and reflect during by antireflecting coating, and the part incident wavelength is passed through, the reflection of part incident wavelength, by the refractive index of control reflectance coating and the product of thickness is the odd-multiple effect of incident wavelength 1/4 λ, interferes and the acquisition reflecting effect and produce.
For panel of LCD, every increase by 1% reflectivity is promptly represented loss 1% penetrance, that is loses 1% brightness, so panel of LCD must improve penetrance as much as possible, reduces its reflectivity simultaneously.
Traditional diffusion board structure is summarized as follows with Fig. 1.Consult Fig. 1, one transparency carrier 101 is provided, the material of this transparency carrier 101 can be acrylic acid (acrylic) resin sheet, the polymethylmethacrylate of uniform polymeric (homopolymer) (polymethyl methacrylate) for example, deposition one diffusion layer (diffusing layer) on this transparency carrier 101, this diffusion layer comprises one and has bonding agent (binder) 103 of polymerism (polymerizable) and scattering 105 of a plurality of spherical forms.The bonding agent 103 that forms polymerism uses to comprise with an alkyl polyacrylate (polyalkyl methacrylate) and is main functional group's high molecular polymer, for example polymethylmethacrylate (polyethyl methacrylate) or polypropylmethacryla,es (polypropylmethacrylate) or the like.Scattering 105 can comprise any material with refractive index (refractive index), and its refractive index is different from transparency carrier 101, bonding agent 103 and acryl resin film 107, the material of its scattering 105 can be monox, magnesium oxide (magnesium oxide), titanium dioxide (titanium oxide) or the like, and the size of its particle can be between 1 to 100 micron.Polyvinyl resin film 107 is formed on the diffusion layer, and it has identical composition with transparency carrier 101.
When incident light when including the diffusion layer of scattering 105, bonding agent 103, because the refractive index difference of scattering son 105 and bonding agent 103, therefore incident ray by the time can reflect, the phenomenon of reflection and scattering, that is incident ray reaches the effect that is spread, but the penetrance of this known its light of diffuser plate is not high, and its penetrance arrives 85% approximately only, therefore, make that the utilization rate of light is not high, and then influence a display element, for example overall brightness of LCD performance.
In sum, can't promote the penetrance of incident ray owing to use traditional diffusion board structure, therefore demand providing an improved diffusion board structure urgently, make the penetrance of light improve, and increase the brightness of display.
Summary of the invention
One of the present invention purpose provides a diffusion board structure, and the below that wherein is contained in diffuser plate forms an anti-reflecting layer with antiradar reflectivity, and this anti-reflecting layer can make the penetrance of incident ray improve, and and then increases the brightness performance of display.
Another object of the present invention provides a diffusion board structure, wherein comprising provides one how to have the thermoset resin of meter level particle, it can utilize nanoparticle and thermoset resin to have the characteristic of different refractivity, and then provides display one uniform surface light source, and improves the performance of backlight module.
According to above-described purpose, the invention provides an improved diffuser plate.At first, provide a transparency carrier, a resinous plastic substrate for example, its material can be polycarbonate, polystyrene, polyene, polyethers, polyester, polyamide, polyphenylene sulfide, polyether ester, Polyvinylchloride or polymethacrylate resin or the like.The surface forms a diffusion layer on this transparency carrier, this diffusion layer comprises a plurality of spherical particles and a main material, and wherein the material of a plurality of spherical particles is an organic polymer, for example polymethylmethacrylate, one inorganic material, for example titania (TiO
2), silicon dioxide (SiO
2) or beaded glass etc., and main material also is an organic polymer, for example amido ethyl formate resin, vinyl acetate resin, vestolit, styrene resin or polyvinyl resin or the like, and simultaneously, this diffusion layer can be a wedge shape or irregular.Formation one has the anti-reflecting layer of antiradar reflectivity below transparency carrier, this anti-reflecting layer comprises the particle of a thermoset resin and a plurality of how meter levels, it is that a solvent disperses that the particle of this thermoset resin and a plurality of how meter levels utilizes ethanol, and the mode with single technological process can at random be mixed both, for example a wet process process or a dry process process.At last, this had the anti-reflecting layer coating of antiradar reflectivity or evaporation on the surface below of transparency carrier.
Description of drawings
Fig. 1 is the schematic cross-section of the diffusion board structure of prior art;
Fig. 2 is the structural section signal of a preferred embodiment of the diffusion board structure that improves penetrance of the present invention;
Fig. 3 is the diffusion board structure of penetrance and the structural section synoptic diagram of a backlight module of improving of the present invention.
Symbol description among the figure:
101 transparency carriers
103 bonding agents
105 scattering
107 acryl resin films
201 transparency carriers
203 primary layers of material
205 spherical particles
207 thermoset resins
209 meter level particles how
211 light guide plate
213 diffusion points
215 reflecting plates
217 incident lights
219 light sources
Embodiment
Next be detailed description of the present invention, in the following explanation description of technological process and structure do not comprised the entire flow of making.The existing skill that the present invention continued to use is only done quoting of emphasis formula at this, to help elaboration of the present invention.
Content of the present invention can disclose via the elaboration of a following preferred embodiment and its relevant drawings 2 to Fig. 3.Consult Fig. 2, at first, one transparency carrier 201 with the high grade of transparency and high mechanical properties is provided, a resinous plastic substrate for example, the thickness range of this transparency carrier 201 is at 25-150 micron (micrometer, μ m) between, in addition, the material of the transparency carrier 201 of this plastic resin film can be polycarbonate (polycarbonate), polystyrene (polystyrene), polyester (polyester), polyene (polyolefin), polyethers (polyether), polystyrene (polystyrene), polyamide (polyamide), polyphenylene sulfide (polyphenylenesulfide), polyether ester (polyether-ester), polyester (polyester) or polymethacrylate (polymethacrylate) or the like.
Then, on this transparency carrier 201, form a diffusion layer, this diffusion layer comprises a plurality of spherical particles 205 and is entrained in a main material (host material) layer 203, the material of a plurality of spherical particles 205 is a high-molecular organic material or an inorganic material, for example polymethylmethacrylate (polymethyl methacrylate, PMMA), titania (TiO
2), silicon dioxide (SiO
2) or beaded glass etc., the material of this primary layers of material 203 also is a high-molecular organic material, for example amido ethyl formate (urethane) resin, vinyl acetate (vinyl acetate) resin, vinyl chloride (vinyl chloride) resin, styrene (styrene) resin or tygon (polyethylene) resin or the like.On the other hand, the shape that comprises a plurality of spherical particles 205 and primary layers of material 203 formed diffusion layers can be wedge shape or irregular, and wherein, primary layers of material 203 is a fluid (fluid).In addition, the size of each spherical particle 205 1 between the dozens of micron (micron meter).Be noted that, the refraction number of each spherical particle 205 (refractive index) is also inequality with the refraction number of primary layers of material 203, therefore when incident light passes through interface between primary layers of material 203 and a plurality of spherical particle 205, just can reach the effect that light is spread.
The manufacture of above-mentioned diffuser plate, spherical particle 205 is sneaked into to primary layers of material 203, and the mode of utilization coating, this diffusion layer that comprises primary layers of material 203 and a plurality of spherical particle 203 is coated on the surface of transparency carrier 201, afterwards, carry out one and solidify (curing) technological process, to evaporate the organic solvent in this diffusion layer.In this diffusion layer, a plurality of spherical particles 205 are sneaked into purpose in the primary layers of material 203 in order to obtain highdensity a plurality of spherical particle 205, by these highdensity a plurality of spherical particles 205, and make and to be spread equably when incident light passes through diffusion layer, but the weight of spherical particle 205 can not surpass 300% of primary layers of material 203 weight, otherwise incident light not only can't obtain suitable penetrance, and can influence the adherence of resin.On the other hand, the weight of spherical particle 205 also can not be lower than 10% of primary layers of material 203 weight, otherwise, can influence the effect that its incident light is spread.Therefore, the density of spherical particle 205 Be Controlled suitably.
Because spherical particle 205 and main material 203 formed diffuser plates can make incident light reach the effect that penetrates, but its accessible penetrance is limited, 85% light transmittance for example, therefore, the present invention forms an anti-reflecting layer (Anti-Refection layer) with antiradar reflectivity (lowreflectivity) on the surface below of transparency carrier 201, this anti-reflecting layer comprises a plurality of how the to have particle 209 and thermoset resins (thermosetting resin) 207 of meter level, the particle 209 of these a plurality of how meter levels optionally is blended in the thermoset resin 207, and both are blended in the alcohol solvent, and the thickness range of this anti-reflecting layer is at the 1-30 micron, and the size scope of its a plurality of nanoparticles is at 0.001 micron to 0.1 micron.Because when incident light included a plurality of nanoparticles 209 and thermoset resin 207 formed anti-reflecting layers by this, incident light can produce the characteristic that penetrates and reflect simultaneously.Because the present invention comprises the anti-reflecting layer of a plurality of nanoparticles 209 and thermoset resin 207 by formation, and its anti-reflecting layer has the characteristic of antiradar reflectivity again, therefore, can reduce the reflection of incident light rate, and the penetrance of raising incident light, for example 5% light transmittance.In addition, this anti-reflecting layer has a plurality of nanoparticles 209, therefore, when incident ray passes through this thin layer, can increase the effect that incident ray is spread, and then a display is provided, and for example a LCD provides an even and high area source of brightness.
Moreover, this anti-reflecting layer that comprises a plurality of nanoparticles 209 and thermoset resin 207 utilizes a technological process, a wet process process for example, this anti-reflecting layer is formed on the surface below of transparency carrier 201, wherein, the wet process process is utilized the mode of a coating, or the mode of a ultra-thin coating, for example the printing of nick version is coated with the method for (micro-gravure coating), the method of substrate tension squash type (web tension coating), anti-reflecting layer is coated on the surface below of transparency carrier 201, afterwards, carry out a curing process, the alcohol solvent in the anti-reflecting layer is removed.In addition, in carrying out the dry process process, with thermoset resin 207 with after a plurality of nanoparticles 209 mix with an alcohol solvent, utilize the mode of an evaporation, vacuum deposition method for example, with the anti-reflecting layer evaporation of this antiradar reflectivity on the surface below of transparency carrier 201, because the evaporation mode can accurately be controlled the thickness of this anti-reflecting layer, therefore, in all visible-ranges (400-700nm), its reflectivity can be controlled in below 0.5%.At last, finish the structure of diffuser plate of the present invention.
The anti-reflecting layer of antiradar reflectivity of the present invention, after through actual test, can make the penetrance of incident light promote about 5%, therefore, utilize this formation of anti-reflecting layer with antiradar reflectivity one to have the diffusion board structure of high penetration, and add in the application of a backlight module light intensity that is lost in the time of can compensating because of incident light by backlight module with this structure.As shown in Figure 3, wherein, provide a backlight module, this backlight module comprises a light source 219, and light source 219 can provide a parallel incident light 217.In addition, this backlight module also provides a light guide plate 211 on the surface below of the anti-reflecting layer with antiradar reflectivity, the material of this light guide plate 211 can be acryl resin, simultaneously, this light guide plate 211 comprises and a plurality ofly has equally spaced diffusion point 213 on the surface of light guide plate 211 bottom surfaces, wherein, the material of diffusion point 213 can be titania (titanium dioxide, TiO
2).In addition, this backlight module more provides a reflecting plate 215 on the surface below of light guide plate 211, to increase the service efficiency of incident light 217.When utilizing diffusion board structure of the present invention to add in this backlight module, have the characteristic of high penetration by this diffusion board structure, therefore, can offer a display, liquid crystal display-display for example provides the backlight technology of a high performance.
By above elaboration to the relevant preferred embodiment of the present invention, can understand one of advantage of the present invention for a kind of diffusion board structure is provided, it forms an anti-reflecting layer with antiradar reflectivity on the surface below of this diffusion board structure, this anti-reflecting layer is a thermoset resin and the particle that comprises a plurality of how meter levels, the particle of these a plurality of how meter levels is a solvent with ethanol and at random is blended in the thermoset resin, because this anti-reflecting layer has the characteristic of antiradar reflectivity, therefore when incident light passes through this thin layer, can improve its penetrance, person more, because this anti-reflecting layer has a plurality of nanoparticles, therefore, incident light has the effect that is spread by the anti-reflecting layer time, therefore can provide display the one even and high area source of brightness.
The above only is a preferred embodiment of the present invention, be not in order to limit the right of applying for a patent of the present invention, above simultaneously description should be understood and be implemented for the special personage who knows the present technique field, therefore other does not break away from the equivalence change of being finished under the disclosed spirit or modifies, and all should be included in the described claim.
Claims (10)
1. diffusion board structure that can improve penetrance comprises:
One transparency carrier;
One diffusion layer is positioned at surface on this transparency carrier; And
The anti-reflecting layer of one antiradar reflectivity is on the surface below of this transparency carrier.
2. the diffusion board structure that improves penetrance as claimed in claim 1, wherein above-mentioned diffusion layer comprises the particle of a plurality of ball-types.
3. the diffusion board structure that improves penetrance as claimed in claim 1, the anti-reflecting layer of wherein above-mentioned antiradar reflectivity comprise a plurality of how meter level particles.
4. the diffusion board structure that improves penetrance as claimed in claim 1, the material of the anti-reflecting layer of wherein above-mentioned antiradar reflectivity are a thermoset resin.
5. the diffusion board structure that improves penetrance as claimed in claim 4, the anti-reflecting layer of wherein above-mentioned antiradar reflectivity comprise a plurality of how meter level particles.
6. the diffusion board structure that improves penetrance as claimed in claim 3, the anti-reflecting layer of wherein above-mentioned antiradar reflectivity more comprises an alcohol solvent.
7. can improve the diffusion board structure of penetrance in the backlight module, comprise:
One resinous plastic substrate;
One resin is positioned on this resinous plastic substrate on the surface, and wherein this resin comprises the particle of a plurality of ball-types; And
One thermoset resin is on the surface below of this resinous plastic substrate, and wherein this thermoset resin comprises a plurality of nanoparticles.
8. can improve the diffusion board structure of penetrance in the backlight module as claimed in claim 7, the resin of the wherein above-mentioned particle that comprises a plurality of ball-types, its material can be selected from following person: vinyl acetate resin and vestolit and styrene resin.
9. can improve the diffusion board structure of penetrance in the backlight module as claimed in claim 7, the wherein above-mentioned thermoset resin that comprises a plurality of nanoparticles comprises a thermoset resin with antiradar reflectivity.
10. can improve the diffusion board structure of penetrance in the backlight module as claimed in claim 9, the thermoset resin of wherein above-mentioned antiradar reflectivity more comprises an alcohol solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310120616 CN1629693A (en) | 2003-12-15 | 2003-12-15 | Diffuser plate structure capable of increasing penetration rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310120616 CN1629693A (en) | 2003-12-15 | 2003-12-15 | Diffuser plate structure capable of increasing penetration rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1629693A true CN1629693A (en) | 2005-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310120616 Pending CN1629693A (en) | 2003-12-15 | 2003-12-15 | Diffuser plate structure capable of increasing penetration rate |
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| Country | Link |
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| CN (1) | CN1629693A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408692B (en) * | 2007-10-11 | 2010-07-14 | 宣茂科技股份有限公司 | Stereo LCD device |
| CN101649991B (en) * | 2008-08-14 | 2011-03-30 | 富士迈半导体精密工业（上海）有限公司 | Illumination device |
| CN101625477B (en) * | 2008-07-07 | 2011-08-31 | 东丽尖端素材株式会社 | Optical sheet for tft-lcd back light unit and liquid crystal display having the optical sheet |
-
2003
- 2003-12-15 CN CN 200310120616 patent/CN1629693A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408692B (en) * | 2007-10-11 | 2010-07-14 | 宣茂科技股份有限公司 | Stereo LCD device |
| CN101625477B (en) * | 2008-07-07 | 2011-08-31 | 东丽尖端素材株式会社 | Optical sheet for tft-lcd back light unit and liquid crystal display having the optical sheet |
| CN101649991B (en) * | 2008-08-14 | 2011-03-30 | 富士迈半导体精密工业（上海）有限公司 | Illumination device |
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