CN108303761B - Low blue light optical film for liquid crystal display and preparation method thereof - Google Patents
Low blue light optical film for liquid crystal display and preparation method thereof Download PDFInfo
- Publication number
- CN108303761B CN108303761B CN201710949112.5A CN201710949112A CN108303761B CN 108303761 B CN108303761 B CN 108303761B CN 201710949112 A CN201710949112 A CN 201710949112A CN 108303761 B CN108303761 B CN 108303761B
- Authority
- CN
- China
- Prior art keywords
- blue light
- organic
- inorganic
- liquid crystal
- crystal display
- 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.)
- Active
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 60
- 239000012788 optical film Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 239000006096 absorbing agent Substances 0.000 claims abstract description 119
- 239000002346 layers by function Substances 0.000 claims abstract description 74
- 239000011241 protective layer Substances 0.000 claims abstract description 67
- 230000002745 absorbent Effects 0.000 claims abstract description 45
- 239000002250 absorbent Substances 0.000 claims abstract description 45
- 238000009792 diffusion process Methods 0.000 claims description 62
- 239000010408 film Substances 0.000 claims description 42
- 239000011248 coating agent Substances 0.000 claims description 41
- 238000000576 coating method Methods 0.000 claims description 41
- 239000007788 liquid Substances 0.000 claims description 28
- 239000010410 layer Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 12
- 239000004611 light stabiliser Substances 0.000 claims description 9
- 239000011859 microparticle Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 239000004925 Acrylic resin Substances 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 239000010419 fine particle Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- 239000011701 zinc Substances 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 239000012948 isocyanate Substances 0.000 claims description 4
- 150000002513 isocyanates Chemical class 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229920006267 polyester film Polymers 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004800 polyvinyl chloride Substances 0.000 claims description 4
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000002105 nanoparticle Substances 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 229920001490 poly(butyl methacrylate) polymer Polymers 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 229940071182 stannate Drugs 0.000 claims description 3
- SMVPIIDLDQIDKW-UHFFFAOYSA-N 2-(1-hydroxy-2,2,3,3-tetramethylpiperidin-4-yl)ethanol Chemical compound CC1(C)C(CCO)CCN(O)C1(C)C SMVPIIDLDQIDKW-UHFFFAOYSA-N 0.000 claims description 2
- LEVFXWNQQSSNAC-UHFFFAOYSA-N 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-hexoxyphenol Chemical compound OC1=CC(OCCCCCC)=CC=C1C1=NC(C=2C=CC=CC=2)=NC(C=2C=CC=CC=2)=N1 LEVFXWNQQSSNAC-UHFFFAOYSA-N 0.000 claims description 2
- VQMHSKWEJGIXGA-UHFFFAOYSA-N 2-(benzotriazol-2-yl)-6-dodecyl-4-methylphenol Chemical compound CCCCCCCCCCCCC1=CC(C)=CC(N2N=C3C=CC=CC3=N2)=C1O VQMHSKWEJGIXGA-UHFFFAOYSA-N 0.000 claims description 2
- TWISUSVXOIDKJG-UHFFFAOYSA-N 2-[2-hydroxy-5-(2,4,4-trimethylpentan-2-yl)phenyl]sulfanyl-4-(2,4,4-trimethylpentan-2-yl)phenol;nickel Chemical compound [Ni].CC(C)(C)CC(C)(C)C1=CC=C(O)C(SC=2C(=CC=C(C=2)C(C)(C)CC(C)(C)C)O)=C1 TWISUSVXOIDKJG-UHFFFAOYSA-N 0.000 claims description 2
- ZSSVCEUEVMALRD-UHFFFAOYSA-N 2-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl]-5-(octyloxy)phenol Chemical compound OC1=CC(OCCCCCCCC)=CC=C1C1=NC(C=2C(=CC(C)=CC=2)C)=NC(C=2C(=CC(C)=CC=2)C)=N1 ZSSVCEUEVMALRD-UHFFFAOYSA-N 0.000 claims description 2
- 229920000178 Acrylic resin Polymers 0.000 claims description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004642 Polyimide Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims description 2
- RZSDSZALSKNQGP-UHFFFAOYSA-N [4-(5-chlorobenzotriazol-2-yl)-3-hydroxyphenyl]-phenylmethanone Chemical compound OC1=C(C=CC(=C1)C(C1=CC=CC=C1)=O)N1N=C2C(=N1)C=CC(=C2)Cl RZSDSZALSKNQGP-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 2
- 239000012964 benzotriazole Substances 0.000 claims description 2
- OCWYEMOEOGEQAN-UHFFFAOYSA-N bumetrizole Chemical compound CC(C)(C)C1=CC(C)=CC(N2N=C3C=C(Cl)C=CC3=N2)=C1O OCWYEMOEOGEQAN-UHFFFAOYSA-N 0.000 claims description 2
- SMBJTEYJXOVKQA-UHFFFAOYSA-N butan-1-amine;2-[2-hydroxy-5-(2,4,4-trimethylpentan-2-yl)phenyl]sulfanyl-4-(2,4,4-trimethylpentan-2-yl)phenol;nickel Chemical compound [Ni].CCCCN.CC(C)(C)CC(C)(C)C1=CC=C(O)C(SC=2C(=CC=C(C=2)C(C)(C)CC(C)(C)C)O)=C1 SMBJTEYJXOVKQA-UHFFFAOYSA-N 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052733 gallium Inorganic materials 0.000 claims description 2
- GNOIPBMMFNIUFM-UHFFFAOYSA-N hexamethylphosphoric triamide Chemical compound CN(C)P(=O)(N(C)C)N(C)C GNOIPBMMFNIUFM-UHFFFAOYSA-N 0.000 claims description 2
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 2
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 229920006289 polycarbonate film Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 2
- 150000003852 triazoles Chemical class 0.000 claims description 2
- 239000012632 extractable Substances 0.000 claims 1
- 238000001914 filtration Methods 0.000 abstract description 25
- 230000000694 effects Effects 0.000 abstract description 23
- 238000002834 transmittance Methods 0.000 abstract description 16
- 150000002484 inorganic compounds Chemical class 0.000 abstract description 2
- 229910010272 inorganic material Inorganic materials 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 14
- 238000012360 testing method Methods 0.000 description 14
- 238000001723 curing Methods 0.000 description 13
- 239000012528 membrane Substances 0.000 description 13
- 238000003756 stirring Methods 0.000 description 9
- 239000002994 raw material Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000000975 dye Substances 0.000 description 6
- 230000002829 reductive effect Effects 0.000 description 5
- 230000003595 spectral effect Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000011259 mixed solution Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000011358 absorbing material Substances 0.000 description 3
- 239000011324 bead Substances 0.000 description 3
- 150000004696 coordination complex Chemical class 0.000 description 3
- 230000031700 light absorption Effects 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 1
- 206010057430 Retinal injury Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000010921 in-depth analysis Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 210000001525 retina Anatomy 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Optical Filters (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention provides a low blue light optical film for a liquid crystal display and a preparation method thereof, wherein the low blue light optical film comprises the following components: the functional layer and/or the protective layer contain at least one inorganic blue light absorber and at least one organic blue light absorber or organic-inorganic hybrid blue light absorber; inorganic blue light absorbers include meta-aluminates or meta-stannates. The scheme provided by the invention fully plays the synergistic effect of the specific inorganic compound (inorganic blue light absorbent) and the organic blue light absorbent and the organic inorganic hybrid blue light absorbent, can meet the comprehensive requirements of the display field on blue light filtering effect, light transmittance and stability, has strong operability and has great practical application value.
Description
Technical Field
The invention belongs to the technical field of liquid crystal displays, and particularly relates to a low-blue light optical film for a liquid crystal display and a preparation method thereof.
Background
As LED light sources are widely used in the liquid crystal display (tv, commercial display, industrial display, computer display, notebook computer, tablet, mobile phone, vehicle-mounted, etc.) industry, their energy-saving and highlighting properties are widely accepted in the industry; however, in principle, the short-wave blue light remains too much to cause injury to eyes, so the method is also subject to the industry; one of the existing solutions to the problem is to add a low blue light film or plate, but due to the limitations of technology and materials, the existing technology has either insignificant effect or unstable performance (blue light filtering effect can be obviously attenuated in working state), and has influence on the light transmittance of the whole wave band (including the visible light part of the wave band except blue light), so that the brightness is obviously reduced, and the technology is hardly accepted and applied by industry; still another solution is to remove part of the short-wavelength blue light by shifting the peak wavelength of the LED chip up to 460nm or above, but because the wavelength of the chip is long, the efficiency of exciting the fluorescent powder by the blue light is obviously reduced, which results in larger brightness reduction, and the blue light ratio of the wavelength below 460nm is still higher, which cannot be popularized and used.
For blue light removal, there are always two misregions within the industry:
the first error zone, namely understanding the damage to blue light, considers that all blue light is harmful; blue light of one color of the three primary colors RGB is present everywhere, including blue light in sunlight, and white light cannot be formed due to lack of color without blue light; but the blue light energy in the sunlight is distributed higher near blue light with longer wave band, and the blue light energy below 460nm of the short wave band wavelength is lower (see figure 1); however, the design of the LED light source is based on that blue light with a short wavelength of 450nm is used to excite yellow fluorescent powder (or red-green fluorescent powder) to form yellow light or red-green light, and the rest blue light is used as a color and the excited light is mixed into white light, so that the energy efficiency is proved to be very high, which is also the main reason for the rapid development of the LED light source industry in recent years; however, in consideration of excitation efficiency, the peak wavelength of blue light of the excited fluorescent powder is designed to be 440-450nm, so that blue light of the wave band and adjacent wave bands is stronger (see fig. 2); the medical community proves that blue light with the wave band of 435-440nm has the greatest damage to human eyes, and for this reason, the blue light hazard coefficient also forms national standard (GB/T20145-2006), and the content of a spectral weighting function for evaluating the damage of a broadband light source to retina in the national standard is shown in Table 2; that is, the blue light filtering should be mainly aimed at the short-wave-band blue light with relatively large energy occupation, which is harmful to human eyes, in the LED light source, but not all the wave-band blue light is filtered. From "Table 2 in GB/T20145-2006, the spectral weighting function of the broad band light source to retinal damage" and the LED light source energy distribution (see FIG. 2), the more damaging band is 420-460nm, so high energy blue light with wavelengths between 420-460nm should be treated with emphasis.
The second error area is considered to be required to completely filter blue light or to completely filter blue light with a short wave band, the blue light is an indispensable part of white light, the whole color of the blue light is not seriously yellow to be distorted, and the requirement of human eyes on the color cannot be met from the illumination industry or the display industry; moreover, the sunlight harmless to human eyes is understood to exist in blue light of each wave band, and only the energy distribution of each wave band is different, but the blue light of short wave band is less; thus, blue light is filtered to a degree, not necessarily all, with the goal of being as close to sunlight as possible.
The low blue light optical film for the liquid crystal display with good blue light filtering effect and high stability is not available at present due to the fact that the two error areas exist in the field for a long time and the limitation of the performance of the blue light absorbing material.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a low blue optical film for a liquid crystal display. The low-blue light optical film has the characteristics of good blue light filtering effect, good light transmittance and high stability.
Another object of the present invention is to provide a low blue diffusion sheet for a liquid crystal display.
Still another object of the present invention is to provide a method for preparing the low blue light diffusion sheet for liquid crystal display.
It is still another object of the present invention to provide a liquid crystal display including the low blue diffusion sheet for a liquid crystal display.
In order to achieve the above object, the present invention provides a low blue optical film for a liquid crystal display, the low blue optical film comprising: the functional layer and/or the protective layer contain at least one inorganic blue light absorber and at least one organic blue light absorber or organic-inorganic hybrid blue light absorber; the inorganic blue light absorber comprises meta-aluminate or meta-stannate.
In recent years, various organic blue light absorbers have been developed by the skilled person, and these blue light absorbers mainly composed of organic substances exhibit a certain advantage in terms of blue light filtering effect, but in practice, there is a general problem of poor stability, and they cannot be applied to a high-luminance long-time lighting irradiation environment of an LED light source in a display, and therefore, most of them can be applied only to low-blue light lens industries requiring relatively low levels. At present, there are also reports about the application of organic blue light absorbers in the field of displays, but these schemes either do not solve the problem of poor stability, or cannot achieve both blue light filtering effect and brightness assurance. For example, some low blue flat panel display schemes employ blue light absorbers that are metal complex and (organic) dyes, but the scheme actually suffers from the following significant drawbacks: the effect of absorbing blue light is not obvious when the quantity of the organic dye is small, and the brightness can be greatly influenced when the quantity of the organic dye is large; in addition, the metal complex and the dye have the characteristic of poor light resistance, and the metal complex and the dye fade and lose efficacy after being irradiated for a long time (the working state of the display screen is lightened), so that the blue light filtering effect is obviously attenuated; therefore, when it is applied to the display industry where there is a high demand for blue light filtering effect and reliability, the actual effect cannot meet the demand at all.
The applicant of the present invention has found that the blue light filtering effect, light transmittance and stability are core technical problems to be solved by the low blue light optical film for a liquid crystal display, and in order to solve the problems, the applicant of the present invention provides a combination scheme of a specific inorganic compound (hereinafter referred to as an inorganic blue light absorber) and a blue light absorber mainly comprising an organic substance through extensive practical verification work by in-depth analysis of the problems. The combined cooperation is as follows: the meta-aluminate or meta-stannate inorganic blue light absorber has high self stability, and can effectively absorb ultra-short wave band high-energy blue light (380-450 nm), so that the influence of the ultra-short wave band blue light on the stability of the organic blue light absorber and the organic and inorganic hybrid blue light absorber is avoided, the loads of the organic blue light absorber and the organic and inorganic hybrid blue light absorber are greatly reduced, and the organic blue light absorber and the organic and inorganic hybrid blue light absorber can stably and comprehensively absorb blue light affecting vision severe wave bands with high efficiency; in addition, the mode of distinguishing the key absorption areas can fully exert the advantages of different blue light absorbers, so that the dosage can be controlled in a lower range, the cost control is facilitated, and the light transmittance of the film is improved. Therefore, the scheme provided by the invention fully plays the synergistic effect of the specific inorganic matters, the organic blue light absorbent and the organic-inorganic hybrid blue light absorbent, and provides a new scheme with practical application value for the low blue light technology in the field of displays; the low-blue light optical film provided by the scheme has the comprehensive performance of good blue light filtering effect, good light transmittance and high stability, and can completely meet the performance requirements in the field of displays. In addition, under the basic limitation of the scheme on the types of the selected inorganic blue light absorber, the organic blue light absorber and the organic-inorganic hybrid blue light absorber, the absorption characteristics of each specific blue light absorbing material on blue light in different wave bands are still different, the difference can be fully utilized, and the solutions of different blue light filtering levels can be obtained through matching combination and dosage adjustment of the blue light absorbing materials with different absorption characteristics.
In the low blue optical film for a liquid crystal display, the functional layer and the protective layer are preferably a diffusion film functional layer and a diffusion film protective layer. The diffusion film functional layer and the diffusion film protective layer also comprise resin, curing agent and microparticles; the resin and the curing agent form an adhesive.
In the low blue optical film for a liquid crystal display described above, preferably, the meta-aluminate includes zinc meta-aluminate or gallium meta-aluminate; the metastannate comprises zinc metastannate.
In the low blue optical film for a liquid crystal display, the base material layer is preferably one or more of a polyester film, a polycarbonate film, a polyamide film, a polyimide film, a polypropylene film, a polyethylene film, a polyvinyl chloride film, and the like. Further preferably, the substrate layer is a substrate having good light transmittance and good heat resistance, preferably an optical grade polyester film, and preferably has a thickness of 36 to 250 μm.
In the low blue light optical film for a liquid crystal display, blue light having a large influence on the visual power is mainly in a wavelength band of 410 to 480nm, and therefore, an organic blue light absorber or an organic-inorganic hybrid blue light absorber capable of preferably absorbing blue light in the wavelength band is preferably selected. In addition, it is preferable to select an organic blue light absorber or an organic-inorganic hybrid blue light absorber having relatively good stability as much as possible, and to use the organic blue light absorber in combination with the inorganic blue light absorber. Researches show that the triazole organic blue light absorbent, the phenol organic blue light absorbent, the amine organic blue light absorbent and the nickel organic-inorganic hybrid blue light absorbent have better self stability and very good coordination effect with metaaluminate or metastannate inorganic blue light absorbent. In a preferred embodiment provided by the present invention, the organic blue light absorber comprises 2- (2-hydroxy-3, 5 bis (a, a-dimethylbenzyl) phenyl) benzotriazole, 2- (4, 6-bis (2, 4-dimethylphenyl) -1,3, 5-triazin-2-yl) -5-octyloxyphenol, 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -5-chlorobenzotriazole, 2- (2 '-hydroxy-4' -benzoylphenyl) -5 chloro-2H-benzotriazole, 2- (4, 6-diphenyl-1, 3, 5-triazin-2-yl) -5-n-hexyloxyphenol or hexamethylphosphoric triamide. The organic-inorganic hybrid blue light absorber comprises 2,2' -thiobis (4-tert-octylphenol) nickel extract, 2' -thiobis (4-tert-octylphenol oxy) nickel or 2,2' -thiobis (4-tert-octylphenol) n-butylamine nickel.
In the low blue light optical film for the liquid crystal display, the applicant found that the organic blue light absorber has relatively good blue light filtering effect, but relatively poor stability; the organic-inorganic hybrid blue light absorbent has a slightly poorer blue light filtering effect than the organic blue light absorbent, but has better stability; while inorganic blue light absorbers tend to be the most stable, blue light filtering is somewhat less effective than the former two. Therefore, when various blue light absorbers are used in combination, proper blue light absorber combinations and dosage proportions can be selected according to the respective characteristics.
In the low blue light optical film for a liquid crystal display, preferably, the inorganic blue light absorber is spherical nanoparticles; the particle size is preferably 10 to 100nm, more preferably 40 to 60nm. Thus ensuring the specific surface area; on the premise of ensuring that the light transmittance does not influence the brightness of the display, the blue light absorption efficiency is improved as much as possible.
In the low blue light optical film for a liquid crystal display, preferably, the content of the inorganic blue light absorbent is 0.5% -10% of the coating liquid in the corresponding layer in percentage by weight; the content of the organic blue light absorbent is 0.5% -5% of the coating liquid in the corresponding layer; the content of the organic-inorganic hybrid blue light absorbent is 0.5% -5% of the coating liquid in the corresponding layer.
In the low blue light optical film for a liquid crystal display, it is preferable that at least one kind of inorganic blue light absorber, two kinds of organic blue light absorbers or organic-inorganic hybrid blue light absorbers be contained in the functional layer and/or the protective layer. By combining two or more inorganic blue light absorbers, organic blue light absorbers and organic-inorganic hybrid blue light absorbers which can complement the blue light absorption effects of different wave bands, harmful blue light can be comprehensively and effectively absorbed. The mode can fully exert the characteristics of good absorption effect and good stability of certain single blue light absorbent on certain wave band, and the stability, the light transmittance and the blue light filtering effect of the low blue light optical film can be further improved through combined use.
In the low blue light optical film for a liquid crystal display, preferably, the distribution manner of the inorganic blue light absorber, the organic blue light absorber, and the organic-inorganic hybrid blue light absorber in the functional layer and/or the protective layer is as follows:
the protective layer contains an inorganic blue light absorber, and the functional layer contains an organic blue light absorber and an organic-inorganic hybrid blue light absorber; or,
the functional layer contains an inorganic blue light absorber and an organic-inorganic hybrid blue light absorber; or,
the protective layer contains an inorganic blue light absorber, and the functional layer contains an organic-inorganic hybrid blue light absorber; or,
the protective layer contains inorganic blue light absorbent, and the functional layer contains organic blue light absorbent; or,
the functional layer contains an inorganic blue light absorber, an organic-inorganic hybrid blue light absorber and an organic blue light absorber; or,
the protective layer contains an inorganic blue light absorber and an organic-inorganic hybrid blue light absorber, and the functional layer contains an organic blue light absorber.
In a preferred embodiment provided by the invention, the protective layer contains an inorganic blue light absorber, and the functional layer contains an organic blue light absorber and an organic-inorganic hybrid blue light absorber; or,
the functional layer contains an inorganic blue light absorber and two organic-inorganic hybrid blue light absorbers; or,
the protective layer contains an inorganic blue light absorbent, and the functional layer contains an organic-inorganic hybrid blue light absorbent; or,
the protective layer contains an inorganic blue light absorbent, and the functional layer contains two organic blue light absorbents; or,
the functional layer contains one or more organic blue light absorbers, one or more organic and inorganic hybrid blue light absorbers and one inorganic blue light absorber; or,
the protective layer contains one or more inorganic blue light absorbers and one or more organic-inorganic hybrid blue light absorbers, and the functional layer contains one or more organic blue light absorbers.
In particular, the requirements of blue light filtering and the design requirements of the display can be determined.
In the low blue optical film for a liquid crystal display, a light stabilizer is preferably further added to a layer containing the organic blue light absorber or the organic-inorganic hybrid blue light absorber. The light stabilizer can further improve the stability of the organic blue light absorber and the organic-inorganic hybrid blue light absorber after illumination. Preferably, the light stabilizer comprises bis (1, 2,6, -pentamethyl-4-piperidinyl) -sebacylic acid ester, hydroxyethyl tetramethylpiperidinol, 2- (2H-benzotriazol-2-yl) -6- (dodecyl) -4-methylphenol or rutile type nano-titanium dioxide. Further preferably, the content of the light stabilizer is 0.5 to 5% by weight of the coating liquid in the corresponding layer.
In the low blue optical film for a liquid crystal display, the blue light absorber is preferably selected so as not to substantially absorb visible light of 480nm or more. In the specific implementation, the effect of blue light absorption of each wave band can be controlled by adjusting the proportion and the concentration of each blue light absorbent.
In the low blue optical film for a liquid crystal display described above, preferably, the protective layer has a thickness of 5 to 10 μm; the thickness of the functional layer is 10-25 mu m; the thickness of the substrate layer is 36-250 μm. In practical applications, the proportion of absorbed blue light can also be reduced by adjusting the thickness of the coating containing the blue light absorber.
The invention also provides a low blue light diffusion sheet for the liquid crystal display, which is a film when the functional layer and the protective layer in the low blue light optical film for the liquid crystal display are diffusion film functional layers and diffusion film protective layers; in the low blue light diffusion sheet, the diffusion film functional layer and the diffusion film protective layer further comprise resin, curing agent and microparticles. Wherein the resin and the curing agent form an adhesive.
In the low blue light diffusion sheet for a liquid crystal display described above, preferably, the resin includes a polyacrylate resin or a urethane acrylate resin; the curing agent comprises a polyurethane curing agent or an isocyanate curing agent; the microparticles comprise one or a combination of a plurality of acrylic resin, acrylonitrile resin, polyurethane, polyvinyl chloride, polystyrene, polyacrylonitrile and polyimide; the microparticles are preferably polymethyl methacrylate or polybutyl methacrylate; the particle diameter of the fine particles is preferably 3 to 20. Mu.m.
The invention also provides a preparation method of the low blue light diffusion sheet for the liquid crystal display, which comprises the following steps (the detailed flow is shown in fig. 5):
(1) Preparing a protective layer coating liquid and a functional layer coating liquid respectively;
(2) Then coating a functional layer on one surface of the substrate layer, drying and rolling; the other side is coated with a protective layer, and after drying, the protective layer is rolled up (the coating equipment described in fig. 8 can be used);
(3) And curing, cooling, cutting and slicing to obtain the low blue light diffusion sheet.
In the method for preparing a low blue light diffusion sheet for a liquid crystal display, it is preferable that, when preparing the protective layer coating liquid or the functional layer coating liquid, various blue light absorbers and light stabilizers are added one by one to an organic solvent containing fine particles and a resin, and after adding one material, stirring is performed for 5 to 30 minutes, and then the other material is added.
The invention also provides a liquid crystal display comprising the low blue light diffusion sheet for the liquid crystal display. Preferably, the diffusion sheet of the backlight module in the liquid crystal display is made of the low blue optical film.
The scheme provided by the invention can meet the comprehensive requirements of the display field on blue light filtering effect, light transmittance (display brightness) and stability. And the operability is strong, and the method has great practical application value. The specific effects are as follows:
1. a part of short-wave-band blue light harmful to human eyes in the LED light source can be removed, and the requirements of various healthy display devices for blue light filtering are met;
2. the brightness of the display is not obviously reduced, and the energy-saving high brightness advantage of the LED light source is maintained;
3. has long-term stability.
Drawings
FIG. 1 is a graph of solar light relative spectrum;
FIG. 2 is a relative spectral diagram of an LED light source;
FIG. 3 is a schematic diagram of a low blue light diffusion sheet in embodiment 1
FIG. 4 is a partial enlarged view of the low blue diffuser in example 1;
FIG. 5 is a process flow diagram of a low blue diffuser in example 1;
FIG. 6 is a graph of transmittance versus spectral for a prior art film scheme and a generic product (no blue light filtering);
FIG. 7 is a graph showing the transmittance of the low blue light diffusion sheet and the common product (without blue light filtering function) prepared in example 1;
FIG. 8 is a diagram of a coating apparatus used in example 1;
fig. 9 is a schematic diagram of a backlight module structure in embodiment 1.
21 is a base material layer, 22 is a functional layer, 22a is particles in the functional layer, 22b is a blue light absorber in the functional layer, 22c is an adhesive in the functional layer, 23 is a protective layer, 23a is particles in the protective layer, 23b is a blue light absorber in the protective layer, 23c is an adhesive in the protective layer, 30 is a unreeling material, 40 is a reeling material, 50 is a diffusion coating module, 60 is a drying module, 70 is an ultraviolet hardening module, and 41, 42, 51 and 52 are transfer rollers.
Detailed Description
The technical solution of the present invention will be described in detail below for a clearer understanding of technical features, objects and advantageous effects of the present invention, but should not be construed as limiting the scope of the present invention.
Example 1
The present embodiment provides a low blue light diffusion sheet for a liquid crystal display (structure diagram is shown in fig. 3, partial enlarged view is shown in fig. 4), which is composed of a base material layer 21, a functional layer 22 (diffusion film functional layer) and a protective layer 23 (diffusion film protective layer), wherein the functional layer 22 contains fine particles 22a, a blue light absorber 22b (black dots in the figure), an adhesive 22c (formed of a resin and a curing agent), and the like; the protective layer 23 contains fine particles 23a, a blue light absorber 23b (black dots in the figure), an adhesive 23c (formed of a resin and a curing agent), and the like. In this embodiment, the maximum particle diameter of the fine particles 22a in the protective layer 23 (back surface layer, i.e., light incident surface) is 8 μm, and the maximum particle diameter of the fine particles 23a in the functional layer 22 (front surface layer, i.e., light emitting surface) is 25 μm.
The preparation process of the low blue light diffusion sheet is as follows (see the flow chart of figure 5):
(1) Preparing a protective layer coating solution and a functional layer coating solution respectively;
(2) Then, a functional layer is coated on one side of the substrate layer (coating equipment is shown in fig. 8, and comprises a unreeling material 30, a reeling material 40, a plurality of transfer rollers (4 l, 42, 5l and 52), a diffusion coating module 50, a drying module 60 and an ultraviolet hardening module 70), and the reeling material is rolled after drying; the other side is coated with a protective layer (of the same functional layer) and is rolled after being dried;
(3) And curing, cooling, cutting and slicing to obtain the low blue light diffusion sheet.
Wherein, the raw materials for preparing the functional layer coating solution comprise:
the specific preparation process of the functional layer coating liquid comprises the following steps:
(1) Adding an organic solvent into the charging barrel;
(2) Adding PMMA microparticles into the preparation liquid, and stirring for 30 minutes;
(3) Adding polyacrylate resin into the prepared solution, and stirring for 30 minutes;
(4) Adding various blue light absorbers and light stabilizers into the liquid in sequence, stirring each for 10 minutes, and adding the other one;
(5) Adding isocyanate curing agent into the mixed solution, and stirring for 10 minutes;
(6) The liquid is tested for viscosity, solid content and appearance, and various data are recorded.
Wherein, the raw materials for preparing the protective layer coating solution comprise:
the specific preparation process of the protective layer coating liquid comprises the following steps:
(1) Adding an organic solvent into the charging barrel;
(2) Adding PBMA microparticles into the mixed solution, and stirring for 30 minutes;
(3) Adding polyacrylate resin into the prepared solution, and stirring for 30 minutes;
(4) Adding zinc metaaluminate into the mixed solution, and stirring for 10 minutes;
(5) Adding isocyanate curing agent into the mixed solution, and stirring for 10 minutes;
(6) The liquid is tested for viscosity, solid content and appearance, and various data are recorded.
The following tests were performed on the low blue diffuser described above, and the test results are reported in table 1:
(1) The low blue light diffusion sheet (one surface of the protective layer is close to the light emitting surface of the light guide plate or the diffusion plate) is placed into a backlight module and covers the liquid crystal screen, and the brightness and full spectrum data of each scheme are tested by a CS2000 instrument according to an industry standard method:
type of backlight: DLED (with diffuser plate) or ELED (with light guide plate);
diaphragm test architecture (above the light-emitting surface of the diffusion plate or light guide plate, from bottom to top): low blue optical diffuser + prism sheet combination (or prism sheet and diffuser sheet combination). Fig. 9 is a schematic structural diagram of one of the ELED backlight modules, which includes an upper diffusion film, a prism film 90 °, a prism film 0 °, a low blue diffusion film (sheet), a light guide plate, LEDs (light beads), and a reflective film.
Note that: DLED refers to a direct type backlight type, and ELED refers to a side-in type backlight type.
(2) RA test, which comprises lighting up the module for 240 hours, and then comparing the membrane with the membrane which is not lighted up to test the blue light absorptivity, and looking at the data change rate.
Table 1 low blue light diffuser test results
Note that: 1. blue light absorptivity: in the range of 420-460nm, at the central point of 100% full white field picture of the relevant display, the membrane (low blue light diffusion sheet) and the common membrane (no blue light filtering function) of the embodiment are respectively tested in the same display (only the membrane is replaced) by a spectrum analyzer (such as CS 2000) to test the sum of the spectral radiance (absolute power value) of each 1 nm, and the ratio data of the embodiment and the data of the common membrane is calculated; the blue light filtering ratio of the embodiment is as follows: 1-data of examples/data of common membrane;
2. brightness reduction Rate: when the related display is 100% full white field picture, after adding the membrane of the embodiment, the membrane and the common membrane (without blue light filtering function) are in the same membrane structure (only the membrane is replaced) of the same display, and the brightness data are tested respectively, wherein the brightness reduction rate is that: 1-data of examples/data of common membrane; the brightness measuring method comprises the following steps: 5.6.2 in SJ/T11292-2016;
3. the ratio of reduction of the blue light after RA, which is the ratio of reduction of the blue light after RA, is compared in the same display between the embodiment lighting film and the non-lighting film (see item 1 above specifically) for 240 hours at normal temperature: 1-blue light absorptance after lighting/blue light absorptance after lighting;
4. the comparison example scheme is that the main wavelength of a blue light chip in an LED lamp bead is adjusted to 460nm, and then test data is compared with a conventional display provided with a normal LED lamp bead (the main wavelength of the blue light chip is 450 nm), and the method is described in terms 1-3.
In addition, the conventional film scheme (containing organic dye blue light absorber) was subjected to RA test under the condition of item 3 as in table 1 above and then compared with the conventional product (no blue light filtering function) on the market, and the obtained light transmittance curve is shown in fig. 6 (since the scheme cannot be used for a display, the taken sample cannot reach a state that can be tested in the display, and thus can only be compared by testing the light transmittance curve); the low blue light diffusion sheet (product of the present invention) prepared in this example was subjected to RA test under the condition of item 3 as noted in table 1 above and then compared with the light transmittance of a general product (blue light filtering-free function) on the market, and the resulting light transmittance curve was shown in fig. 7. As can be seen from fig. 6 and 7, the low blue light diffusion sheet in the present embodiment has a performance greatly superior to that of the existing diaphragm scheme, and not only can be used for absorbing harmful blue light in a specific wavelength band with high efficiency and overall, but also has high stability.
Example 2
The present embodiment provides a low blue light diffusion sheet for a liquid crystal display, which is composed of a functional layer (diffusion film functional layer), a base material layer, and a protective layer (diffusion film protective layer).
The preparation method of the low blue light diffusion sheet is the same as that of the embodiment 1; the preparation methods of the functional layer coating liquid and the protective layer coating liquid are similar to those of example 1, except that the blue light absorber and the amount used are different, specifically as follows:
the functional layer coating liquid comprises the following raw materials:
the raw materials of the protective layer coating liquid comprise:
the low blue diffuser was tested in the same manner as the product of example 1 and the test results are reported in table 1.
Example 3
The present embodiment provides a low blue light diffusion sheet for a liquid crystal display, which is composed of a functional layer (diffusion film functional layer), a base material layer, and a protective layer (diffusion film protective layer).
The preparation method of the low blue light diffusion sheet is the same as that of the embodiment 1; the preparation methods of the functional layer coating liquid and the protective layer coating liquid are similar to those of example 1, except that the blue light absorber and the amount used are different, specifically as follows:
the raw materials of the functional layer coating solution comprise:
the raw materials of the protective layer coating solution comprise:
the low blue diffuser was tested in the same manner as the product of example 1 and the test results are reported in table 1.
Example 4
The present embodiment provides a low blue light diffusion sheet for a liquid crystal display, which is composed of a functional layer (diffusion film functional layer), a base material layer, and a protective layer (diffusion film protective layer).
The preparation method of the low blue light diffusion sheet is the same as that of the embodiment 1; the preparation methods of the functional layer coating liquid and the protective layer coating liquid are similar to those of example 1, except that the blue light absorber and the amount used are different, specifically as follows:
the raw materials of the functional layer coating solution comprise:
the raw materials of the protective layer coating solution comprise:
the low blue diffuser was tested in the same manner as the product of example 1 and the test results are reported in table 1.
Claims (21)
1. A low blue optical film for a liquid crystal display, the low blue optical film comprising:
the functional layer and/or the protective layer contain at least one inorganic blue light absorber and at least one organic blue light absorber or organic-inorganic hybrid blue light absorber;
the inorganic blue light absorber comprises meta-aluminate or meta-stannate;
wherein the functional layer and the protective layer are a diffusion film functional layer and a diffusion film protective layer;
wherein the meta-aluminate comprises zinc meta-aluminate or gallium meta-aluminate; the metastannate comprises zinc metastannate.
2. The low-blue optical film for a liquid crystal display according to claim 1, wherein the base material layer is one or more of a polyester film, a polycarbonate film, a polyamide film, a polyimide film, a polypropylene film, a polyethylene film, and a polyvinyl chloride film.
3. The low blue optical film for liquid crystal display according to claim 2, wherein said base material layer is an optical grade polyester film having a thickness of 36 to 250 μm.
4. The low blue optical film for liquid crystal display according to claim 1, wherein said organic blue absorbent comprises triazole-based organic blue absorbent, phenol-based organic blue absorbent or amine-based organic blue absorbent; the organic-inorganic hybrid blue light absorber is a nickel organic-inorganic hybrid blue light absorber.
5. The low blue light optical film for liquid crystal display according to claim 4, wherein said organic blue light absorber comprises 2- (2-hydroxy-3, 5 bis (a, a-dimethylbenzyl) phenyl) benzotriazole, 2- (4, 6-bis (2, 4-dimethylphenyl) -1,3, 5-triazin-2-yl) -5-octyloxyphenol, 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -5-chlorobenzotriazole, 2- (2 '-hydroxy-4' -benzoylphenyl) -5 chloro-2H-benzotriazole, 2- (4, 6-diphenyl-1, 3, 5-triazin-2-yl) -5-n-hexyloxyphenol or hexamethylphosphoric triamide.
6. The low blue light optical film for liquid crystal display according to claim 5, wherein said organic-inorganic hybrid blue light absorber comprises 2,2' -thiobis (4-tert-octylphenol) nickel extractables, 2' -thiobis (4-tert-octylphenol oxy) nickel or 2,2' -thiobis (4-tert-octylphenol) n-butylamine nickel.
7. The low blue light optical film for liquid crystal display according to claim 1, wherein said inorganic blue light absorber is spherical nanoparticles; the particle size is 10-100nm.
8. The low blue light optical film for liquid crystal display according to claim 7, wherein said spherical nano particles have a particle size of 40 to 60nm.
9. The low blue optical film for liquid crystal display according to claim 7, wherein the content of the inorganic blue absorbent is 0.5 to 10% by weight of the coating liquid in the corresponding layer; the content of the organic blue light absorbent is 0.5% -5% of the coating liquid in the corresponding layer; the content of the organic-inorganic hybrid blue light absorbent is 0.5% -5% of the coating liquid in the corresponding layer.
10. The low blue optical film according to claim 9, wherein the functional layer and/or the protective layer contains at least one inorganic blue light absorber, two organic blue light absorbers or an organic-inorganic hybrid blue light absorber.
11. The low blue optical film for liquid crystal display according to claim 1, wherein the distribution manner of the inorganic blue absorbent, the organic blue absorbent, and the organic-inorganic hybrid blue absorbent in the functional layer and/or the protective layer is:
the protective layer contains an inorganic blue light absorber, and the functional layer contains an organic blue light absorber and an organic-inorganic hybrid blue light absorber; or,
the functional layer contains an inorganic blue light absorber and an organic-inorganic hybrid blue light absorber; or,
the protective layer contains an inorganic blue light absorber, and the functional layer contains an organic-inorganic hybrid blue light absorber; or,
the protective layer contains inorganic blue light absorbent, and the functional layer contains organic blue light absorbent; or,
the functional layer contains an inorganic blue light absorber, an organic-inorganic hybrid blue light absorber and an organic blue light absorber; or,
the protective layer contains an inorganic blue light absorber and an organic-inorganic hybrid blue light absorber, and the functional layer contains an organic blue light absorber.
12. The low blue optical film for liquid crystal display according to claim 11, wherein said protective layer contains an inorganic blue light absorber, and said functional layer contains an organic blue light absorber and an organic-inorganic hybrid blue light absorber; or,
the functional layer contains an inorganic blue light absorber and two organic-inorganic hybrid blue light absorbers; or,
the protective layer contains an inorganic blue light absorbent, and the functional layer contains an organic-inorganic hybrid blue light absorbent; or,
the protective layer contains an inorganic blue light absorbent, and the functional layer contains two organic blue light absorbents; or,
the functional layer contains more than one organic blue light absorbent, more than one organic-inorganic hybrid blue light absorbent and one inorganic blue light absorbent; or,
the protective layer contains more than one inorganic blue light absorbent and more than one organic-inorganic hybrid blue light absorbent, and the functional layer contains more than one organic blue light absorbent.
13. The low blue optical film for liquid crystal display according to any one of claims 1 to 12, wherein a light stabilizer is further added to a corresponding layer containing said organic blue light absorber or organic-inorganic hybrid blue light absorber.
14. The low blue light optical film for liquid crystal display according to claim 13, wherein said light stabilizer comprises bis (1, 2,6, -pentamethyl-4-piperidinyl) -sebacylic acid ester, hydroxyethyl tetramethyl piperidinol, 2- (2H-benzotriazol-2-yl) -6- (dodecyl) -4-methylphenol, rutile type nano titanium dioxide.
15. The low blue optical film for liquid crystal display according to claim 14, wherein the content of said light stabilizer is 0.5 to 5% by weight of the coating liquid in the corresponding layer.
16. The low blue optical film for liquid crystal display according to claim 1, wherein said protective layer has a thickness of 5 to 10 μm; the thickness of the functional layer is 10-25 mu m; the thickness of the substrate layer is 36-250 μm.
17. A low blue light diffusion sheet for a liquid crystal display, wherein the low blue light diffusion sheet is one of the functional layers and the protective layers of the low blue light optical film for a liquid crystal display according to any one of claims 1 to 16, which are a diffusion film functional layer and a diffusion film protective layer; in the low blue light diffusion sheet, the diffusion film functional layer and the diffusion film protective layer further comprise resin, curing agent and microparticles.
18. The low blue light diffusion sheet for liquid crystal display according to claim 17, wherein said resin comprises a polyacrylate resin or a urethane acrylate resin;
the curing agent comprises a polyurethane curing agent or an isocyanate curing agent;
the microparticles comprise one or a combination of a plurality of acrylic resin, acrylonitrile resin, polyurethane, polyvinyl chloride, polystyrene, polyacrylonitrile or polyimide; the particle size of the microparticles is 3-20 μm.
19. The low blue light diffusion sheet according to claim 18, wherein said fine particles are polymethyl methacrylate or polybutyl methacrylate.
20. A method of producing a low blue light diffusion sheet for a liquid crystal display according to any one of claims 17 to 19, comprising the steps of:
(1) Preparing a protective layer coating liquid and a functional layer coating liquid respectively;
(2) Then coating a functional layer on one surface of the substrate layer, drying and rolling; coating a protective layer on the other side, drying and then rolling;
(3) And curing, cooling, cutting and slicing to obtain the low blue light diffusion sheet.
21. A liquid crystal display comprising the low blue diffusion sheet for a liquid crystal display according to any one of claims 17 to 19.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710922451 | 2017-09-30 | ||
| CN2017109224514 | 2017-09-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108303761A CN108303761A (en) | 2018-07-20 |
| CN108303761B true CN108303761B (en) | 2023-12-08 |
Family
ID=62870065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710949112.5A Active CN108303761B (en) | 2017-09-30 | 2017-10-12 | Low blue light optical film for liquid crystal display and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108303761B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112391048A (en) * | 2020-11-18 | 2021-02-23 | 上海伟星光学有限公司 | Polyurethane lens with infrared and blue light prevention function and manufacturing method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4314178A (en) * | 1978-07-04 | 1982-02-02 | Matsushita Electric Industrial Co., Ltd. | Low-energy-electron-exciting fluorescent display device |
| EP0855602A2 (en) * | 1997-01-28 | 1998-07-29 | Kyowa Hakko Kogyo Co., Ltd. | Molded synthetic resin |
| JP2008145883A (en) * | 2006-12-12 | 2008-06-26 | Keiwa Inc | Light diffusion sheet for liquid crystal display device |
| CN103044892A (en) * | 2013-01-11 | 2013-04-17 | 华南师范大学 | Fluorescent and transparent polycarbonate grating for LED (light-emitting diode) and preparation method for same |
| CN106010348A (en) * | 2014-12-31 | 2016-10-12 | 苏州斯迪克新材料科技股份有限公司 | OCA (optically clear adhesive) optical protecting tape for electronic products |
| CN106243864A (en) * | 2016-06-27 | 2016-12-21 | 宁波东旭成新材料科技有限公司 | A kind of have the reflectance coating filtering gold-tinted function |
| CN106291777A (en) * | 2015-05-19 | 2017-01-04 | 象山激智新材料有限公司 | The light-transmissive film of a kind of anti-blue light or plate and application thereof |
| EP3203271A1 (en) * | 2016-02-08 | 2017-08-09 | ESSILOR INTERNATIONAL (Compagnie Générale d'Optique) | Blue light cutting optical material comprising a benzotriazole uv absorber |
-
2017
- 2017-10-12 CN CN201710949112.5A patent/CN108303761B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4314178A (en) * | 1978-07-04 | 1982-02-02 | Matsushita Electric Industrial Co., Ltd. | Low-energy-electron-exciting fluorescent display device |
| EP0855602A2 (en) * | 1997-01-28 | 1998-07-29 | Kyowa Hakko Kogyo Co., Ltd. | Molded synthetic resin |
| JP2008145883A (en) * | 2006-12-12 | 2008-06-26 | Keiwa Inc | Light diffusion sheet for liquid crystal display device |
| CN103044892A (en) * | 2013-01-11 | 2013-04-17 | 华南师范大学 | Fluorescent and transparent polycarbonate grating for LED (light-emitting diode) and preparation method for same |
| CN106010348A (en) * | 2014-12-31 | 2016-10-12 | 苏州斯迪克新材料科技股份有限公司 | OCA (optically clear adhesive) optical protecting tape for electronic products |
| CN106291777A (en) * | 2015-05-19 | 2017-01-04 | 象山激智新材料有限公司 | The light-transmissive film of a kind of anti-blue light or plate and application thereof |
| EP3203271A1 (en) * | 2016-02-08 | 2017-08-09 | ESSILOR INTERNATIONAL (Compagnie Générale d'Optique) | Blue light cutting optical material comprising a benzotriazole uv absorber |
| CN106243864A (en) * | 2016-06-27 | 2016-12-21 | 宁波东旭成新材料科技有限公司 | A kind of have the reflectance coating filtering gold-tinted function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108303761A (en) | 2018-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107561608B (en) | Low-blue light optical film for LED lighting device and preparation method thereof | |
| CN104849789B (en) | A kind of optical thin film of anti-blue light and its application | |
| CN103715191B (en) | Lighting device | |
| CN106291777B (en) | The light-transmissive film or plate of a kind of anti-blue light and its application | |
| KR20200001265U (en) | Light emission reduction compounds for electronic devices | |
| CN108614376A (en) | A kind of high efficiency quantum dot film and its preparation method and application reflecting blue light | |
| CN103823257A (en) | Blue light-proof optical diffusion film | |
| US10126485B2 (en) | Optical film and lighting and display products including same | |
| CN104476874A (en) | Anti-dazzle and anti-blue-light protection film | |
| CN207780296U (en) | A kind of low blue light optical film of liquid crystal display | |
| AU2005202557B2 (en) | Optical film capable of absorbing ultraviolet light | |
| CN101688936A (en) | Near-infrared-absorbing film and optical filter employing the same for plasma display panel | |
| CN110506225A (en) | Ophthalmically acceptable utensil optical film with shade function, the optical laminate using the optical film, the ophthalmically acceptable utensil with shade function | |
| CN108303761B (en) | Low blue light optical film for liquid crystal display and preparation method thereof | |
| KR20200118555A (en) | Optical member and optical display apparatus comprising the same | |
| CN109652063B (en) | Blue light conversion agent, blue light-proof adhesive tape and preparation method thereof | |
| JP5323190B2 (en) | Transmission type liquid crystal display device and light diffusion plate | |
| CN105974497B (en) | Color enhancement film for color display equipment and preparation method thereof | |
| CN103823258A (en) | Blue light-blocking diffusion film | |
| CN109143711B (en) | Transparent blue-light-proof protective film and preparation method thereof | |
| CN106118442A (en) | A kind of blooming cold coating and application thereof | |
| US20160116718A1 (en) | Methods and System for Manufacturing Infrared (IR) Absorbing Lens | |
| CN209784577U (en) | Novel prevent blue light optical film | |
| EP3379326A1 (en) | Optical film for eyewear, and functional film for eyewear, optical laminate for eyewear, and eyewear which have same | |
| CN108680980B (en) | Blue light prevention optical film and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: No. 196 Hezhan Road, Caojing Town, Jinshan District, Shanghai, 201507 Applicant after: CCS (SHANGHAI) FUNCTIONAL FILMS INDUSTRY CO.,LTD. Address before: No. 188 Hezhan Road, Caojing Town, Jinshan District, Shanghai, 201507 Applicant before: CCS (SHANGHAI) FUNCTIONAL FILMS INDUSTRY CO.,LTD. |
|
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No. 196 Hezhan Road, Caojing Town, Jinshan District, Shanghai, 201507 Applicant after: Kaixinsen (Shanghai) functional film industry Co.,Ltd. Address before: No. 196 Hezhan Road, Caojing Town, Jinshan District, Shanghai, 201507 Applicant before: CCS (SHANGHAI) FUNCTIONAL FILMS INDUSTRY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |