CN113835144A - Blue-light-proof high-brightness microlens composite film and preparation method thereof - Google Patents

Blue-light-proof high-brightness microlens composite film and preparation method thereof Download PDF

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CN113835144A
CN113835144A CN202111222389.0A CN202111222389A CN113835144A CN 113835144 A CN113835144 A CN 113835144A CN 202111222389 A CN202111222389 A CN 202111222389A CN 113835144 A CN113835144 A CN 113835144A
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layer
blue
light
octagonal
micro
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丁利明
季文静
路健
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Changzhou Huawei Advanced Material Co Ltd
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Changzhou Huawei Advanced Material Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0012—Arrays characterised by the manufacturing method
    • G02B3/0031—Replication or moulding, e.g. hot embossing, UV-casting, injection moulding
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

The invention discloses a blue light prevention high-brightness micro-lens composite film which comprises a back glue layer, a first substrate layer, a blue light prevention prism structure layer, an adhesive layer, a second substrate layer and a micro-lens structure layer stacked on the second substrate layer from bottom to top, wherein the back glue layer, the first substrate layer, the blue light prevention prism structure layer, the adhesive layer, the second substrate layer and the micro-lens structure layer stacked on the second substrate layer are sequentially stacked, a rectangular pyramid structure and an octagonal protruding structure are arranged on the micro-lens structure layer in an array mode, 4 adjacent octagonal protruding structures surround to form a diamond area, the rectangular pyramid structure is filled in the diamond area, the octagonal protruding structure comprises an octagonal base and micro-lenses which are coaxially stacked, prisms are arranged on the blue light prevention prism structure layer in an array mode, the heights of the prisms are circularly arranged in a horizontal direction and a longitudinal direction in a mode with the height N as a period, the height of the prisms is not less than 0, and blue light absorption particles with the particle size of 10-50 nm are uniformly distributed in the prisms. According to the invention, by controlling the particle size of the blue light absorbing particles, the composite film has excellent blue light prevention effect and light transmittance, and further realizes accurate blocking of high-energy short-wave blue light with a wave band below 450 nm.

Description

Blue-light-proof high-brightness microlens composite film and preparation method thereof
Technical Field
The invention relates to the technical field of optical films, in particular to a blue-light-proof high-brightness micro-lens composite film and a preparation method thereof.
Background
The medical research report shows that visible light with the wavelength of 500-800 nm basically has no destructive effect on the retina, while blue light with the wavelength of 380-480 nm increases the photon energy along with the shortening of the wavelength, so that the damage degree of the blue light on the retina rapidly increases, and the destructive effect of the blue light on the retina is the greatest.
At present, red, green and blue primary colors are adopted for excitation in LED display as a backlight light source, and the wavelength range of blue light is 420-460 nm, so that selective protection needs to be carried out on the blue light prevention film for developing the blue light prevention film.
The existing blue light prevention scheme: firstly, sticking a blue-proof film on an LCD external screen; secondly, the backlight module uses a blue-resistant film; third, the software filters the blue light, but the three schemes have the following defects:
firstly, the operation of attaching the anti-blue-light film to the outer screen of the LCD is simple in the small-size LCD (mobile phone, computer monitor, PAD), but the attaching of the large-size LCD (large-size liquid crystal television) is difficult.
Second, backlight unit use anti blue light membrane, have two kinds at present to resist blue light optical film, one kind is to do the individual layer and prevent blue light prism membrane, one kind is single prism complex film, prevents that blue light layer establishes between PET lower floor or 2 layers of PET. Although the 2 types solve the problem of blue light and reduce chromatic aberration, the light transmittance and the luminance of the backlight module are sacrificed.
And thirdly, the eye protection effect of the software blue filtering is really obvious, but the color cast is yellow and severe.
Aiming at the defects of low transmissivity, serious color cast, no targeted protection and the like in the prior art, the invention provides the blue-light-resistant high-brightness microlens composite film which has high light transmission and good blue-light-resistant effect, is more targeted for protecting blue light, is free, convenient and simple for matching products with different requirements, and the preparation method thereof, in particular to the targeted effective protection on the blue spectrum area with the greatest damage to human bodies by exciting the strongest part of 380 nm-450 nm fluorescent powder such as LED, OLED and the like.
Disclosure of Invention
Aiming at the defects of poor effect, low transmissivity and the like of a blue light prevention film in the prior art, the invention provides a novel blue light prevention high-brightness micro-lens composite film and a preparation method thereof.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a blue light-proof high-brightness microlens composite film comprises a back glue layer, a first substrate layer, a blue light-proof prism structure layer, an adhesive layer, a second substrate layer which are sequentially laminated from bottom to top, and a microlens structure layer laminated on the second substrate layer, the microlens structure layer is provided with a rectangular pyramid structure and an octagonal raised structure in an array manner, 4 adjacent octagonal raised structures surround to form a diamond area, the rectangular pyramid structure is filled in the diamond-shaped area, the octagonal protruding structure comprises an octagonal base and microlenses which are coaxially stacked, prisms are arrayed on the blue light prevention prism structure layer, the heights of the prisms are circularly arrayed in a cycle of one period of high N and low N in the transverse direction and the longitudinal direction, n is more than or equal to 0, the distance between adjacent prisms is 50-60 mu m, and blue light absorbing particles with the particle size of 10-50 nm are uniformly distributed in the prisms.
The first substrate layer and the second substrate layer play a supporting role, the adhesive layer plays a role in connection and compounding, the back adhesive layer is used for being bonded with other materials, the blue-light-proof prism structure layer has the functions of optical brightening and optical visual angle widening, and the blue-light-proof prism structure layer plays important anti-reflection and blue-light-proof roles.
Different from the traditional micro-lens structure, the edge areas of the adjacent micro-lenses are reused, the octagonal base is firstly laminated at the bottom of the micro-lenses, the edges of the regular octagonal base can form regular diamond areas, and the rectangular pyramid structures are arranged in the diamond areas, so that the area of the micro-lens structure layer is ensured to be used by 100%, the light transmittance of the micro-lens structure layer is increased, and the brightness of the micro-lens structure is improved.
In order to prevent the blue light absorbing particles from being exposed on the surface of the film layer to cause poor service life and environmental stability, the blue light absorbing particles are added into the blue light preventing prism structure layer, so that the blue light preventing service life and the environmental stability of the composite film can be effectively improved.
According to the invention, by controlling the particle size of the blue light absorbing particles, most of short-wave blue light is absorbed to reduce the damage to human eyes while the brightness of a screen is not influenced, so that the composite film has excellent blue light prevention effect and light transmittance, the accurate blocking of high-energy short-wave blue light with a wave band below 450nm is further realized, the phenomenon of color cast and yellow is reduced, the color difference of the composite film after filtering is controlled, and the defects in the prior art are completely overcome.
Preferably, in the blue-light-proof high-luminance microlens composite film, the bottom surface outline of the microlens coincides with an inscribed circle of an octagonal base, the diameter of the inscribed circle of the octagonal base is 100-120 μ M, the height of the microlens is circularly arranged in the horizontal direction and the longitudinal direction by taking the height M as a period, M is larger than or equal to 0, and the height of the octagonal protruding structure is 6-12 μ M.
The bottom surface outline of the micro lens is coincided with the inscribed circle of the octagonal base, so that the coverage area of the micro lens can be ensured to the maximum extent, high brightness is kept, and a higher integral optical effect is met.
The micro-lenses are circularly arranged with a high M and a low M, and can play a role in resisting pressure and scraping. By adopting the structure, the risk of scratching other parts can be reduced, and the poor appearance defects such as moire interference and the like can be reduced.
Preferably, in the blue-light-proof high-luminance microlens composite film, the side lengths of the rectangular pyramid structure and the octagonal base are equal, and the height of the rectangular pyramid structure is 6-10 μm.
The side length of the rectangular pyramid structure is equal to that of the octagonal bases, so that gaps between all adjacent octagonal bases can be filled, the coverage rate of the micro-lens structure layer is further guaranteed, and the effect of improving the brightness of a product is achieved.
In addition, the rectangular pyramid structure is not higher than the octagonal protruding structure, and other parts can be effectively prevented from being scratched.
Preferably, when M is greater than or equal to 1, the microlenses are circularly arranged in a period of high M and low M, the octagonal base and the microlenses with two heights are stacked to form a high octagonal protruding structure and a low octagonal protruding structure, and the heights of the low octagonal protruding structure and the rectangular pyramid structure are equal.
The microlens structure layer is provided with the octagonal protruding structures with different heights, so that the problem of light interference can be reduced, and the luminance gain effect is improved.
Preferably, when N is larger than or equal to 1, the prisms are circularly arranged in a period of high N and low N, the vertex angle of the prisms is not less than 90 degrees, and the distance between the high prisms and the low prisms is 50-60 μm.
High prisms can penetrate into the adhesive layer, resulting in loss of some luminance, but low prisms can still maintain luminance. Therefore, the prisms of the invention are circularly arranged in a period with high N and low N, so that the luminance can be effectively improved, and the stripping force is also ensured.
The apex angle of prism is not less than 90 to incident light's refraction and reflection number of times are few, can reduce light loss, thereby promote luminance.
Preferably, in the above microlens composite film with blue light prevention and high luminance, the vertex of the high prism corresponds to the center of the octagonal base.
The vertex of the prism corresponds to the center of the octagonal base, so that the refraction and reflection times of incident light can be reduced, the light loss is reduced, and the brightness is improved.
Preferably, the preparation method of the blue-light-proof high-brightness microlens composite film comprises the following steps:
s1: laser engraving: taking a roller blank A made of copper or nickel, engraving a rectangular pyramid structure and an octagonal convex structure on the roller blank A by adopting an ultra-precise engraving machine to prepare a micro-lens structure mould, taking a roller blank B made of copper or nickel, engraving a prism structure on the roller blank B by adopting a diamond knife engraving process to prepare a prism structure mould;
in step S1, the ultra-precision engraving machine is used to engrave the microlens structure mold, so that the engraving precision can be fully ensured, even the micron precision can be achieved, the mold has a very low deviation of only ± 0.1 μm, and the mold has an auxiliary function for subsequent alignment bonding. The prism structure carved by the diamond knife carving process has a complete structure and a smooth surface, is smooth in demoulding during coating, and has a longer service life.
S2: preparing blue light prevention coating liquid: taking nano cerium oxide A, nano zinc oxide A and a solvent A according to the ratio of 1:1: 100-1: 2: uniformly mixing and fully dispersing 150 parts by weight, stirring for 20-30 min at the stirring speed of 1500rpm/min, continuously adding the acrylic resin A, and continuously stirring for 40min, wherein the weight part ratio of the acrylic resin A to the solvent A is 1.2: 1-1.5: 1, finally adding a photoinitiator A and continuously stirring for 10min, wherein the weight ratio of the photoinitiator A to the acrylic resin A is 0.07: 1-0.1: 1, and stirring to obtain a blue light prevention coating liquid, wherein the nano cerium oxide A and the nano zinc oxide A are used as blue light absorption particles;
in step S2, the raw materials are added in the above order and stirred at high speed, so that the materials are sufficiently dissolved, the volatilization of the solvent is reduced, and the dispersion is uniform.
S3: coating the blue-light-proof coating liquid on a first substrate layer by using an ultra-precise coating machine, transferring a prism structure onto the first substrate layer by using a prism structure mold, volatilizing a solvent A at the temperature of 60-120 ℃, and carrying out photocuring to obtain a blue-light-proof prism structure layer;
in step S3, the coating speed can reach 15-20 m/min by ultra-precise coating and rolling, the productivity is effectively improved, the transfer efficiency is high, the number of bad defects is small, and the yield is high. In addition, the invention adopts the processes of thermal volatilization and photocuring, can fully remove the solvent, and obtains a film layer with very uniform thickness after photocuring.
S4: preparing UV type acrylic resin: mixing and stirring an acrylate monomer and a polyurethane acrylate oligomer until the acrylate monomer is completely dissolved, adding a photoinitiator B, continuously stirring for 10min, finally adding a dispersing aid and a slipping agent, and continuously stirring for 5min to obtain uniform and stable UV type acrylic resin, wherein the weight ratio of the acrylate monomer to the polyurethane acrylate oligomer to the dispersing aid to the photoinitiator B to the slipping agent is 40:55:2:5: 0.5-35: 60:2:6: 0.5;
in step S4, the raw materials are added in the above-described order and dispersed by stirring, whereby the respective components are effectively and sufficiently dispersed and dissolved. The dispersing auxiliary agent has the effect of dispersing all the components, and the problems of agglomeration, solidification and the like can not occur during use.
S5: taking a second substrate layer, coating UV type acrylic resin on the second substrate layer by using an ultra-precise coating machine, transferring a rectangular pyramid structure and an octagonal convex structure onto the second substrate layer by using a micro-lens structure die, and then carrying out UV photocuring in a hundred-level dust-free room environment, wherein the wavelength of a UV lamp is 365nm, and the photocuring time is 1-2 s, so as to prepare a micro-lens structure layer;
in step S5, the UV light curing can achieve the purpose of instant curing, and no harmful gas is volatilized, and the curing speed can reach 15-20 m/min. The coating is applied in a hundred-grade dust-free room environment, so that the defects caused by foreign matters can be effectively reduced, and the yield is improved.
S6: preparing an adhesive: mixing and stirring UV type adhesive, butanone A and a leveling aid according to the weight part ratio of 2:8: 0.01-3: 7:0.02, continuously adding butanone B or ethyl acetate A for dilution until the solid content reaches 10-20%, continuously stirring at a high speed for 30min, and setting the rotating speed to be 1500rpm/min to prepare a uniform and stable adhesive;
in step S6, the adhesive does not adopt conventional resin, and only uses a combination of a solvent and a UV-type adhesive, so that the solid content is relatively low, which is only 10-20%, and no solid remains, thereby allowing more sufficient blue light absorption.
S7: coating the adhesive on the other side of the second substrate layer by adopting a slit or slightly concave coating mode, wherein the wet thickness after coating is 30-50 mu m, then placing the second substrate layer in an oven at the temperature of 40-70 ℃ for drying for 2-3 min, the air inlet and exhaust flow of the oven is set to be 30000-35000 cubic meters per hour, and the dry thickness of the adhesive obtained after drying is 2-5 mu m;
in step S7, by applying a slit or a dimple and drying the adhesive, an adhesive having a uniform and stable thickness can be obtained, and the problem of streaks due to uneven thickness can be reduced.
S8: coating a back glue layer: mixing and stirring acrylic resin B, a polyurethane monomer, a photoinitiator C, PBMA diffusion particle, ethyl acetate B, butyl acetate and a composite auxiliary agent according to a weight part ratio of 4:5:0.1:0.01:1: 0.01-4: 5:0.1:0.01:2:2:0.01 to prepare a back adhesive coating, coating the back adhesive coating on one side of a first substrate layer, and carrying out photocuring or thermocuring to prepare a back adhesive layer;
in step S8, the back adhesive coating prepared by the above formula has a good dispersion effect, and the finally prepared back adhesive layer has the advantages of high compressive strength, high wear resistance and good antistatic effect.
S9: and (3) laminating: aligning and laminating the blue-light-proof prism structure layer and the second substrate layer, piercing the peak of the prism into the adhesive layer, curing the prism through a high-pressure mercury lamp or an LED lamp in a rolling and laminating mode, wherein the curing energy is 2000-3000 mj/cm3And finally, rolling to obtain the blue-light-proof high-brightness micro-lens composite film.
In step S9, the above pressing mode is adopted, and the peak of the prism is inserted into the height of 2-3 um, so that the brightness of the micro-lens composite film can be ensured, the peeling force of the product is ensured, and the defects of layering and the like are reduced.
Preferably, in the preparation method of the blue-light-resistant high-luminance microlens composite film, in step S6, the adhesive further includes nano cerium oxide B and nano zinc oxide B, and the ratio of the UV type adhesive to the nano cerium oxide B to the nano zinc oxide B is 2:1: 1-3: 2:2 by weight.
The solid content of the adhesive only reaches 10-20%, and the nano cerium oxide B and the nano zinc oxide B can be fully dissolved and dispersed after the adhesive is introduced.
Preferably, in step S8, the back adhesive coating further includes nano cerium oxide C and nano zinc oxide C, and the weight ratio of the acrylic resin B, the nano cerium oxide C, and the nano zinc oxide C is 4:3: 3-4: 4: 4.
The nanometer cerium oxide C and the nanometer zinc oxide C are added into the back glue coating, the effect of absorbing blue light is exerted, the concealer is facilitated, and the preparation and production process is simple.
Preferably, in the above method for preparing a blue-light-resistant high-luminance microlens composite film, in step S9, a laser alignment device is used to perform alignment and lamination, and the prism and the octagonal base are coaxially arranged.
The laser alignment device is adopted to carry out accurate alignment and lamination, and an excellent alignment effect is obtained. The vertex angle of lower prism is coaxial with octagon base center, helps improving the product brilliance.
Compared with the prior art, the high-brightness blue light prevention microlens composite film prepared finally has the advantages of high brightness, low light interference, obvious blue light prevention effect, simple and convenient manufacturing process, great increase in product brightness and higher product competitiveness.
Drawings
FIG. 1 is a first schematic structural diagram of the present invention;
FIG. 2 is a second schematic structural view of the present invention;
FIG. 3 is a third schematic structural view of the present invention;
FIG. 4 is a schematic structural diagram of a microlens structure layer according to the present invention.
Detailed Description
The invention will be described in further detail below with reference to the accompanying figures 1-4 and the detailed description, but they are not intended to limit the invention:
example 1
A blue light-proof high-brightness micro-lens composite film comprises a back glue layer 1, a first substrate layer 2, a blue light-proof prism structure layer 3, an adhesive layer 6, a second substrate layer 4 which are sequentially laminated from bottom to top, and a micro-lens structure layer 5 laminated on the second substrate layer 4, the microlens structure layer 5 is provided with four pyramid structures 51 and octagonal convex structures in an array manner, 4 adjacent octagonal convex structures surround to form a diamond region, the rectangular pyramid structures 51 are filled in the diamond-shaped regions, the octagonal protruding structures comprise coaxially stacked octagonal bases 53 and microlenses 52, prisms 31 are arrayed on the blue-light-proof prism structure layer 3, the heights of the prisms 31 are circularly arrayed in a cycle of one period of high N and low N in the transverse direction and the longitudinal direction, n is more than or equal to 0, the distance between adjacent prisms 31 is 50 mu m, and blue light absorbing particles with the particle size of 10nm are uniformly distributed in the prisms 31.
Preferably, the outline of the bottom surface of the microlens 52 coincides with an inscribed circle of the octagonal base 53, the diameter of the inscribed circle of the octagonal base 53 is 100 μ M, the height of the microlens 52 is cyclically arranged in a cycle of height M in the horizontal direction and the vertical direction, M is greater than or equal to 0, and the height of the octagonal projection structure is 6 μ M.
Preferably, the side lengths of the rectangular pyramid structures 51 and the octagonal base 53 are equal, and the height of the rectangular pyramid structures 51 is 6 μm.
Preferably, when M is greater than or equal to 1, the microlenses 52 are cyclically arranged in a period of high M and low M, the octagonal base 53 is stacked with the microlenses 52 of two heights to form a high octagonal protruding structure 531 and a low octagonal protruding structure 532, and the low octagonal protruding structure 532 is equal to the height of the rectangular pyramid structure 51.
Preferably, when N ≧ 1, the prisms 31 are cyclically arranged at a period of high N low, the apex angle of the prisms 31 is not less than 90 °, and the interval between the high prisms 31 and the low prisms 31 is 50 μm.
Preferably, the apex of the tall prism 31 corresponds to the center of the octagonal base 53.
Preferably, the method comprises the following steps:
s1: laser engraving: taking a roller blank A made of copper or nickel, engraving a rectangular pyramid structure 51 and an octagonal convex structure on the roller blank A by adopting an ultra-precise engraving machine to prepare a micro-lens structure mould, then taking a roller blank B made of copper or nickel, engraving a prism 31 structure on the roller blank B by adopting a diamond knife engraving process to prepare a prism structure mould;
s2: preparing blue light prevention coating liquid: taking nano cerium oxide A, nano zinc oxide A and a solvent A according to the ratio of 1:1: uniformly mixing 100 parts by weight, fully dispersing, stirring for 20min at the stirring speed of 1500rpm/min, continuously adding the acrylic resin A, and continuously stirring for 40min, wherein the weight part ratio of the acrylic resin A to the solvent A is 1.2: 1, finally adding a photoinitiator A and continuously stirring for 10min, wherein the weight part ratio of the photoinitiator A to the acrylic resin A is 0.07:1, and preparing a blue light prevention coating liquid after stirring, wherein the nano cerium oxide A and the nano zinc oxide A are used as blue light absorption particles;
s3: taking a first substrate layer 2, coating the blue-light-proof coating liquid on the first substrate layer 2 by adopting an ultra-precise coating machine, transferring a prism 31 structure onto the first substrate layer 2 by using a prism structure mold, volatilizing a solvent A at the temperature of 60-120 ℃, and carrying out photocuring to obtain a blue-light-proof prism structure layer 3;
s4: preparing UV type acrylic resin: mixing and stirring an acrylate monomer and a polyurethane acrylate oligomer until the acrylate monomer is completely dissolved, adding a photoinitiator B, continuously stirring for 10min, finally adding a dispersing aid and a slipping agent, and continuously stirring for 5min to obtain uniform and stable UV type acrylic resin, wherein the weight ratio of the acrylate monomer to the polyurethane acrylate oligomer to the dispersing aid to the photoinitiator B to the slipping agent is 40:55:2:5: 0.5;
s5: taking a second substrate layer 4, coating UV type acrylic resin on the second substrate layer 4 by using an ultra-precise coating machine, transferring a rectangular pyramid structure 51 and an octagonal convex structure onto the second substrate layer 4 by using a micro-lens structure mould, and then carrying out UV light curing in a hundred-grade dustless room environment, wherein the wavelength of a UV lamp is 365nm, and the light curing time is 1s, so as to prepare a micro-lens structure layer 5;
s6: preparing an adhesive: mixing and stirring UV type adhesive, butanone A and leveling auxiliary agent according to the weight portion ratio of 2:8:0.01, continuously adding butanone B or ethyl acetate A for dilution until the solid content reaches 10%, continuously stirring at high speed for 30min, and setting the rotating speed to be 1500rpm/min to prepare uniform and stable adhesive;
s7: coating the adhesive on the other surface of the second substrate layer 4 by adopting a slit or slightly concave coating mode, wherein the wet thickness after coating is 30 micrometers, then placing the coated substrate in a drying oven at 40 ℃ for drying for 2min, the air intake and exhaust flow of the drying oven is set to be 30000 cubic meters per hour, and the dry thickness of the dried substrate is 2 micrometers;
s8: coating the back glue layer 1: mixing and stirring acrylic resin B, a polyurethane monomer, a photoinitiator C, PBMA diffusion particle, ethyl acetate B, butyl acetate and a composite auxiliary agent according to the weight part ratio of 4:5:0.1:0.01:1:1:0.01 to prepare a back adhesive coating, coating the back adhesive coating on one side of the first substrate layer 2, and carrying out photocuring or thermocuring to prepare a back adhesive layer 1;
s9: and (3) laminating: the blue-light-proof prism structure layer 3 and the second substrate layer 4 are pressed in an aligned mode, the peak of the prism 31 penetrates into the adhesive layer 6, the curing is carried out through a high-pressure mercury lamp or an LED lamp in a rolling and laminating mode, and the curing energy is 2000mj/cm3And finally, rolling to obtain the blue-light-proof high-brightness micro-lens composite film.
Preferably, in step S6, the adhesive further includes nano cerium oxide B and nano zinc oxide B, and the ratio of the UV type adhesive to the nano cerium oxide B to the nano zinc oxide B is 2:1:1 by weight.
Preferably, in step S8, the back adhesive coating further includes nano cerium oxide C and nano zinc oxide C, and the weight ratio of the acrylic resin B, the nano cerium oxide C, and the nano zinc oxide C is 4:3: 3.
Preferably, in step S9, a laser alignment device is used to perform alignment and pressing, and the prism 31 and the octagonal base 53 are coaxially disposed.
Example 2
A blue light-proof high-brightness micro-lens composite film comprises a back glue layer 1, a first substrate layer 2, a blue light-proof prism structure layer 3, an adhesive layer 6, a second substrate layer 4 which are sequentially laminated from bottom to top, and a micro-lens structure layer 5 laminated on the second substrate layer 4, the microlens structure layer 5 is provided with four pyramid structures 51 and octagonal convex structures in an array manner, 4 adjacent octagonal convex structures surround to form a diamond region, the rectangular pyramid structures 51 are filled in the diamond-shaped regions, the octagonal protruding structures comprise coaxially stacked octagonal bases 53 and microlenses 52, prisms 31 are arrayed on the blue-light-proof prism structure layer 3, the heights of the prisms 31 are circularly arrayed in a cycle of one period of high N and low N in the transverse direction and the longitudinal direction, n is more than or equal to 0, the distance between adjacent prisms 31 is 55 mu m, and blue light absorbing particles with the particle size of 30nm are uniformly distributed in the prisms 31.
Preferably, the outline of the bottom surface of the microlens 52 coincides with an inscribed circle of the octagonal base 53, the diameter of the inscribed circle of the octagonal base 53 is 110 μ M, the height of the microlens 52 is cyclically arranged in a cycle of height M in the horizontal direction and the vertical direction, M is greater than or equal to 0, and the height of the octagonal projection structure is 9 μ M.
Preferably, the side lengths of the rectangular pyramid structures 51 and the octagonal base 53 are equal, and the height of the rectangular pyramid structures 51 is 8 μm.
Preferably, when M is greater than or equal to 1, the microlenses 52 are cyclically arranged in a period of high M and low M, the octagonal base 53 is stacked with the microlenses 52 of two heights to form a high octagonal protruding structure 531 and a low octagonal protruding structure 532, and the low octagonal protruding structure 532 is equal to the height of the rectangular pyramid structure 51.
Preferably, when N ≧ 1, the prisms 31 are cyclically arranged at a period of high N low, the apex angle of the prisms 31 is not less than 90 °, and the interval between the high prisms 31 and the low prisms 31 is 55 μm.
Preferably, the apex of the tall prism 31 corresponds to the center of the octagonal base 53.
Preferably, the method comprises the following steps:
s1: laser engraving: taking a roller blank A made of copper or nickel, engraving a rectangular pyramid structure 51 and an octagonal convex structure on the roller blank A by adopting an ultra-precise engraving machine to prepare a micro-lens structure mould, then taking a roller blank B made of copper or nickel, engraving a prism 31 structure on the roller blank B by adopting a diamond knife engraving process to prepare a prism structure mould;
s2: preparing blue light prevention coating liquid: taking nano cerium oxide A, nano zinc oxide A and a solvent A according to the ratio of 1:1.5: uniformly mixing and fully dispersing 125 parts by weight, stirring for 25min at the stirring speed of 1500rpm/min, continuously adding the acrylic resin A, and continuously stirring for 40min, wherein the weight part ratio of the acrylic resin A to the solvent A is 1.4: 1, finally adding a photoinitiator A and continuously stirring for 10min, wherein the weight ratio of the photoinitiator A to the acrylic resin A is 0.08:1, and stirring to obtain a blue light prevention coating liquid, wherein the nano cerium oxide A and the nano zinc oxide A are used as blue light absorption particles;
s3: taking a first substrate layer 2, coating the blue-light-proof coating liquid on the first substrate layer 2 by adopting an ultra-precise coating machine, transferring a prism 31 structure onto the first substrate layer 2 by using a prism structure mold, volatilizing a solvent A at the temperature of 60-120 ℃, and carrying out photocuring to obtain a blue-light-proof prism structure layer 3;
s4: preparing UV type acrylic resin: mixing and stirring an acrylate monomer and a polyurethane acrylate oligomer until the acrylate monomer is completely dissolved, adding a photoinitiator B, continuously stirring for 10min, finally adding a dispersing aid and a slipping agent, and continuously stirring for 5min to obtain uniform and stable UV type acrylic resin, wherein the weight ratio of the acrylate monomer to the polyurethane acrylate oligomer to the dispersing aid to the photoinitiator B to the slipping agent is 38:58:2:5.5: 0.5;
s5: taking a second substrate layer 4, coating UV type acrylic resin on the second substrate layer 4 by using an ultra-precise coating machine, transferring a rectangular pyramid structure 51 and an octagonal convex structure onto the second substrate layer 4 by using a micro-lens structure mould, and then carrying out UV light curing in a hundred-grade dustless room environment, wherein the wavelength of a UV lamp is 365nm, and the light curing time is 1.5s, so as to prepare a micro-lens structure layer 5;
s6: preparing an adhesive: mixing and stirring UV type adhesive, butanone A and leveling aid according to the weight portion ratio of 2.5:7.5:0.01, continuously adding butanone B or ethyl acetate A for dilution until the solid content reaches 15%, continuously stirring at high speed for 30min, and setting the rotating speed to be 1500rpm/min to prepare uniform and stable adhesive;
s7: coating the adhesive on the other side of the second substrate layer 4 by adopting a slit or slightly concave coating mode, wherein the wet thickness after coating is 40 micrometers, then placing the coated substrate in an oven at the temperature of 40-70 ℃ for drying for 2.5min, the air inlet and exhaust flow of the oven is set to be 32000 cubic meters per hour, and the dry thickness of the dried substrate is 3.5 micrometers;
s8: coating the back glue layer 1: mixing and stirring acrylic resin B, a polyurethane monomer, a photoinitiator C, PBMA diffusion particle, ethyl acetate B, butyl acetate and a composite auxiliary agent according to the weight part ratio of 4:5:0.1:0.01:1:1.5:0.01 to prepare a back adhesive coating, coating the back adhesive coating on one side of the first substrate layer 2, and carrying out photocuring or thermocuring to prepare a back adhesive layer 1;
s9: and (3) laminating: the blue-light-proof prism structure layer 3 and the second substrate layer 4 are pressed in an aligned mode, the peak of the prism 31 penetrates into the adhesive layer 6, curing is carried out through a high-pressure mercury lamp or an LED lamp in a rolling and laminating mode, and the curing energy is 2500mj/cm3And finally, rolling to obtain the blue-light-proof high-brightness micro-lens composite film.
Preferably, in step S6, the adhesive further includes nano cerium oxide B and nano zinc oxide B, and the ratio of parts by weight of the UV type adhesive, the nano cerium oxide B and the nano zinc oxide B is 2.5:1.5: 1.5.
Preferably, in step S8, the back adhesive coating further includes nano cerium oxide C and nano zinc oxide C, and the weight ratio of the acrylic resin B, the nano cerium oxide C, and the nano zinc oxide C is 4:3.5: 3.5.
Preferably, in step S9, a laser alignment device is used to perform alignment and pressing, and the prism 31 and the octagonal base 53 are coaxially disposed.
Example 3
A blue light-proof high-brightness micro-lens composite film comprises a back glue layer 1, a first substrate layer 2, a blue light-proof prism structure layer 3, an adhesive layer 6, a second substrate layer 4 which are sequentially laminated from bottom to top, and a micro-lens structure layer 5 laminated on the second substrate layer 4, the microlens structure layer 5 is provided with four pyramid structures 51 and octagonal convex structures in an array manner, 4 adjacent octagonal convex structures surround to form a diamond region, the rectangular pyramid structures 51 are filled in the diamond-shaped regions, the octagonal protruding structures comprise coaxially stacked octagonal bases 53 and microlenses 52, prisms 31 are arrayed on the blue-light-proof prism structure layer 3, the heights of the prisms 31 are circularly arrayed in a cycle of one period of high N and low N in the transverse direction and the longitudinal direction, n is more than or equal to 0, the distance between adjacent prisms 31 is 60 mu m, and blue light absorbing particles with the particle size of 50nm are uniformly distributed in the prisms 31.
Preferably, the bottom contour of the microlens 52 coincides with an inscribed circle of the octagonal base 53, the diameter of the inscribed circle of the octagonal base 53 is 120 μ M, the height of the microlens 52 is cyclically arranged in a cycle of height M in the horizontal direction and height M in the longitudinal direction, M is greater than or equal to 0, and the height of the octagonal projection structure is 12 μ M.
Preferably, the side lengths of the rectangular pyramid structures 51 and the octagonal base 53 are equal, and the height of the rectangular pyramid structures 51 is 10 μm.
Preferably, when M is greater than or equal to 1, the microlenses 52 are cyclically arranged in a period of high M and low M, the octagonal base 53 is stacked with the microlenses 52 of two heights to form a high octagonal protruding structure 531 and a low octagonal protruding structure 532, and the low octagonal protruding structure 532 is equal to the height of the rectangular pyramid structure 51.
Preferably, when N ≧ 1, the prisms 31 are cyclically arranged at a period of high N low, the apex angle of the prisms 31 is not less than 90 °, and the interval between the high prisms 31 and the low prisms 31 is 60 μm.
Preferably, the apex of the tall prism 31 corresponds to the center of the octagonal base 53.
Preferably, the method comprises the following steps:
s1: laser engraving: taking a roller blank A made of copper or nickel, engraving a rectangular pyramid structure 51 and an octagonal convex structure on the roller blank A by adopting an ultra-precise engraving machine to prepare a micro-lens structure mould, then taking a roller blank B made of copper or nickel, engraving a prism 31 structure on the roller blank B by adopting a diamond knife engraving process to prepare a prism structure mould;
s2: preparing blue light prevention coating liquid: taking nano cerium oxide A, nano zinc oxide A and a solvent A according to the ratio of 1:2: uniformly mixing and fully dispersing 150 parts by weight, stirring for 30min at the stirring speed of 1500rpm/min, continuously adding the acrylic resin A, and continuously stirring for 40min, wherein the weight part ratio of the acrylic resin A to the solvent A is 1.5:1, finally adding a photoinitiator A and continuously stirring for 10min, wherein the weight ratio of the photoinitiator A to the acrylic resin A is 0.1:1, and stirring to obtain a blue light prevention coating liquid, wherein the nano cerium oxide A and the nano zinc oxide A are used as blue light absorption particles;
s3: taking a first substrate layer 2, coating the blue-light-proof coating liquid on the first substrate layer 2 by adopting an ultra-precise coating machine, transferring a prism 31 structure onto the first substrate layer 2 by using a prism structure mold, volatilizing a solvent A at the temperature of 60-120 ℃, and carrying out photocuring to obtain a blue-light-proof prism structure layer 3;
s4: preparing UV type acrylic resin: mixing and stirring an acrylate monomer and a polyurethane acrylate oligomer until the acrylate monomer is completely dissolved, adding a photoinitiator B, continuously stirring for 10min, finally adding a dispersing aid and a slipping agent, and continuously stirring for 5min to obtain uniform and stable UV type acrylic resin, wherein the weight ratio of the acrylate monomer to the polyurethane acrylate oligomer to the dispersing aid to the photoinitiator B to the slipping agent is 35:60:2:6: 0.5;
s5: taking a second substrate layer 4, coating UV type acrylic resin on the second substrate layer 4 by using an ultra-precise coating machine, transferring a rectangular pyramid structure 51 and an octagonal convex structure onto the second substrate layer 4 by using a micro-lens structure mould, and then carrying out UV light curing in a hundred-grade dustless room environment, wherein the wavelength of a UV lamp is 365nm, and the light curing time is 2s, so as to prepare a micro-lens structure layer 5;
s6: preparing an adhesive: mixing and stirring UV type adhesive, butanone A and leveling aid according to the weight part ratio of 3:7:0.02, continuously adding butanone B or ethyl acetate A for dilution until the solid content reaches 20%, continuously stirring at high speed for 30min, and setting the rotating speed to be 1500rpm/min to prepare uniform and stable adhesive;
s7: coating the adhesive on the other surface of the second substrate layer 4 by adopting a slit or slightly concave coating mode, wherein the wet thickness after coating is 50 micrometers, then placing the coated substrate in an oven at the temperature of 40-70 ℃ for drying for 3min, the air intake and exhaust flow of the oven is set to be 35000 cubic meters per hour, and the dry thickness of the dried substrate is 5 micrometers;
s8: coating the back glue layer 1: mixing and stirring acrylic resin B, a polyurethane monomer, a photoinitiator C, PBMA diffusion particle, ethyl acetate B, butyl acetate and a composite auxiliary agent according to the weight part ratio of 4:5:0.1:0.01:2:2:0.01 to prepare a back adhesive coating, coating the back adhesive coating on one side of a first substrate layer 2, and carrying out photocuring or thermocuring to prepare a back adhesive layer 1;
s9: and (3) laminating: the blue-light-proof prism structure layer 3 and the second substrate layer 4 are pressed in an aligned mode, the peak of the prism 31 penetrates into the adhesive layer 6, the curing is carried out through a high-pressure mercury lamp or an LED lamp in a rolling and laminating mode, and the curing energy is 3000mj/cm3And finally, rolling to obtain the blue-light-proof high-brightness micro-lens composite film.
Preferably, in step S6, the adhesive further includes nano cerium oxide B and nano zinc oxide B, and the ratio of the UV type adhesive to the nano cerium oxide B to the nano zinc oxide B in parts by weight is 3:2: 2.
Preferably, in step S8, the back coating further includes nano cerium oxide C and nano zinc oxide C, and the weight ratio of the acrylic resin B, the nano cerium oxide C, and the nano zinc oxide C is 4:4: 4.
Preferably, in step S9, a laser alignment device is used to perform alignment and pressing, and the prism 31 and the octagonal base 53 are coaxially disposed.
Example 4
The blue-light-resistant high-brightness microlens composite film obtained in each example is used as a comparative example, a KMOP-2HH type microlens prism composite film produced by the existing Kangde New company is used for testing the brightness performance, and the testing method is as follows:
(1) testing the brightness performance: the microlens composite film is made into a universal backlight module, the universal backlight module is horizontally or vertically placed, a light source of the backlight module is stabilized after being electrified and lightened for 15min, a test optical instrument is placed at 50 +/-3 cm right above or in front of the backlight module, luminance data of the backlight module are tested, and the luminance ratio of examples 1-3 relative to a comparative example is obtained by taking the luminance of the comparative example as a reference.
The performance parameters of the blue-light-resistant high-brightness microlens composition and the comparative example obtained in each embodiment of the invention are shown in the table 1:
TABLE 1
Sample (I) Percentage of brightness
Example 1 103％
Example 2 104％
Example 3 105％
Comparative example 100％
In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.

Claims (10)

1. The utility model provides a prevent microlens complex film of blue light high brilliance, from up including gum layer (1), first substrate layer (2) that stack gradually down, prevent blue light prism structural layer (3), gluing agent layer (6), second substrate layer (4), its characterized in that: the blue-light-proof prism structure layer comprises a second substrate layer (4) and is characterized by further comprising a micro lens structure layer (5) stacked on the second substrate layer (4), wherein a rectangular pyramid structure (51) and an octagonal protruding structure are arranged on the micro lens structure layer (5) in an array mode, 4 adjacent octagonal protruding structures surround to form a diamond region, the rectangular pyramid structure (51) is filled in the diamond region, the octagonal protruding structure comprises an octagonal base (53) and micro lenses (52) which are stacked coaxially, prisms (31) are arranged on the blue-light-proof prism structure layer (3) in an array mode, the height of each prism (31) is cyclically arranged in a horizontal direction and a longitudinal direction by taking the height N as a period, the N is larger than or equal to 0, the distance between every two adjacent prisms (31) is 50-60 mu m, and blue-light-absorbing particles with the particle size of 10-50 nm are uniformly distributed in each prism (31).
2. The blue-light-proof high-luminance microlens composite film according to claim 1, wherein: the bottom surface outline of the micro lens (52) is superposed with an inscribed circle of the octagonal base (53), the diameter of the inscribed circle of the octagonal base (53) is 100-120 mu M, the height of the micro lens (52) is circularly arranged in the transverse direction and the longitudinal direction by taking the height M as a period, M is more than or equal to 0, and the height of the octagonal protruding structure is 6-12 mu M.
3. The blue-light-proof high-brightness microlens composite film according to claim 2, wherein: the side lengths of the rectangular pyramid structure (51) and the octagonal base (53) are equal, and the height of the rectangular pyramid structure (51) is 6-10 mu m.
4. The blue-light-proof high-luminance microlens composite film according to claim 3, wherein: when M is larger than or equal to 1, the micro lenses (52) are circularly arranged in a period of high M and low M, the octagonal base (53) and the micro lenses (52) with two heights are laminated to correspondingly form a high octagonal protruding structure (531) and a low octagonal protruding structure (532), and the heights of the low octagonal protruding structure (532) and the rectangular pyramid structure (51) are equal.
5. The blue-light-proof high-brightness microlens composite film according to claim 4, wherein: when N is larger than or equal to 1, the prisms (31) are circularly arranged in a period with high N and low N, the vertex angle of the prisms (31) is not less than 90 degrees, and the distance between the high prisms (31) and the low prisms (31) is 50-60 mu m.
6. The blue-light-proof high-brightness microlens composite film according to claim 5, wherein: the apex of the tall prism (31) corresponds to the center of the octagonal base (53).
7. The method for preparing a blue-light-proof high-brightness micro-lens composite film according to claim 6, wherein the method comprises the following steps: the method comprises the following steps:
s1: laser engraving: taking a roller blank A made of copper or nickel materials, engraving a rectangular pyramid structure (51) and an octagonal protruding structure on the roller blank A by adopting an ultra-precise engraving machine to prepare a micro-lens structure mould, then taking a roller blank B made of copper or nickel materials, engraving a prism (31) structure on the roller blank B by adopting a diamond knife engraving process to prepare a prism structure mould;
s2: preparing blue light prevention coating liquid: taking nano cerium oxide A, nano zinc oxide A and a solvent A according to the ratio of 1:1: 100-1: 2: uniformly mixing and fully dispersing 150 parts by weight, stirring for 20-30 min at the stirring speed of 1500rpm/min, continuously adding the acrylic resin A, and continuously stirring for 40min, wherein the weight part ratio of the acrylic resin A to the solvent A is 1.2: 1-1.5: 1, finally adding a photoinitiator A and continuously stirring for 10min, wherein the weight ratio of the photoinitiator A to the acrylic resin A is 0.07: 1-0.1: 1, and stirring to obtain a blue light prevention coating liquid, wherein the nano cerium oxide A and the nano zinc oxide A are used as blue light absorption particles;
s3: taking a first substrate layer (2), coating the blue-light-proof coating liquid on the first substrate layer (2) by adopting an ultra-precise coating machine, transferring a prism (31) structure onto the first substrate layer (2) by using a prism structure mould, volatilizing a solvent A at the temperature of 60-120 ℃, and carrying out photocuring to obtain a blue-light-proof prism structure layer (3);
s4: preparing UV type acrylic resin: mixing and stirring an acrylate monomer and a polyurethane acrylate oligomer until the acrylate monomer is completely dissolved, adding a photoinitiator B, continuously stirring for 10min, finally adding a dispersing aid and a slipping agent, and continuously stirring for 5min to obtain uniform and stable UV type acrylic resin, wherein the weight ratio of the acrylate monomer to the polyurethane acrylate oligomer to the dispersing aid to the photoinitiator B to the slipping agent is 40:55:2:5: 0.5-35: 60:2:6: 0.5;
s5: taking a second substrate layer (4), coating UV type acrylic resin on the second substrate layer (4) by adopting an ultra-precise coating machine, transferring a rectangular pyramid structure (51) and an octagonal protruding structure onto the second substrate layer (4) by using a micro-lens structure mould, and then carrying out UV photocuring in a hundred-level dust-free room environment, wherein the wavelength of a UV lamp is 365nm, and the photocuring time is 1-2 s, so as to obtain a micro-lens structure layer (5);
s6: preparing an adhesive: mixing and stirring UV type adhesive, butanone A and a leveling aid according to the weight part ratio of 2:8: 0.01-3: 7:0.02, continuously adding butanone B or ethyl acetate A for dilution until the solid content reaches 10-20%, continuously stirring at a high speed for 30min, and setting the rotating speed to be 1500rpm/min to prepare a uniform and stable adhesive;
s7: coating the adhesive on the other side of the second substrate layer (4) by adopting a slit or slightly concave coating mode, wherein the wet thickness after coating is 30-50 mu m, then placing the substrate in an oven at 40-70 ℃ for drying for 2-3 min, the air intake and exhaust flow of the oven is set to be 30000-35000 cubic meters per hour, and the dry thickness of the adhesive obtained after drying is 2-5 mu m;
s8: coating the back glue layer (1): mixing and stirring acrylic resin B, a polyurethane monomer, a photoinitiator C, PBMA diffusion particle, ethyl acetate B, butyl acetate and a composite auxiliary agent according to a weight part ratio of 4:5:0.1:0.01:1: 0.01-4: 5:0.1:0.01:2:2:0.01 to prepare a back adhesive coating, coating the back adhesive coating on one side of a first substrate layer (2), and carrying out photocuring or thermocuring to prepare a back adhesive layer (1);
s9: and (3) laminating: the anti-blue-light prism structure layer (3) and the second substrate layer (4) are aligned and laminated, the peak of the prism (31) pierces the adhesive layer (6), and is cured through a high-pressure mercury lamp or an LED lamp in a rolling and laminating mode, wherein the curing energy is 2000-3000 mj/cm3And finally, rolling to obtain the blue-light-proof high-brightness micro-lens composite film.
8. The method for preparing a blue-light-proof high-brightness micro-lens composite film according to claim 7, wherein the method comprises the following steps: in the step S6, the adhesive further comprises nano cerium oxide B and nano zinc oxide B, and the weight ratio of the UV type adhesive to the nano cerium oxide B to the nano zinc oxide B is 2:1: 1-3: 2: 2.
9. The method for preparing a blue-light-proof high-brightness micro-lens composite film according to claim 8, wherein the method comprises the following steps: in step S8, the back glue coating further comprises nano cerium oxide C and nano zinc oxide C, and the acrylic resin B, the nano cerium oxide C and the nano zinc oxide C are mixed in a weight ratio of 4:3: 3-4: 4: 4.
10. The method for preparing a blue-light-proof high-brightness micro-lens composite film according to claim 7, wherein the method comprises the following steps: in the step S9, a laser alignment device is adopted to perform alignment and lamination, and the prism (31) and the octagonal base (53) are coaxially arranged.
CN202111222389.0A 2021-10-20 2021-10-20 Blue-light-proof high-brightness microlens composite film and preparation method thereof Pending CN113835144A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115291429A (en) * 2022-08-05 2022-11-04 武汉华星光电技术有限公司 Liquid crystal display panel
WO2023124993A1 (en) * 2021-12-29 2023-07-06 宁波激智科技股份有限公司 Optical functional thin film

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023124993A1 (en) * 2021-12-29 2023-07-06 宁波激智科技股份有限公司 Optical functional thin film
CN115291429A (en) * 2022-08-05 2022-11-04 武汉华星光电技术有限公司 Liquid crystal display panel

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