CN209514106U - A kind of lenticule brightness enhancement film - Google Patents
A kind of lenticule brightness enhancement film Download PDFInfo
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- CN209514106U CN209514106U CN201822195267.7U CN201822195267U CN209514106U CN 209514106 U CN209514106 U CN 209514106U CN 201822195267 U CN201822195267 U CN 201822195267U CN 209514106 U CN209514106 U CN 209514106U
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- brightness enhancement
- enhancement film
- lenticule
- pyramid
- hemispherical lens
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Abstract
The utility model relates to backlight module optical film field, in particular to a kind of lenticule brightness enhancement film.In order to solve the problems, such as that existing brightness enhancement film cannot take into account brightness and covering, the utility model provides a kind of lenticule brightness enhancement film.The brightness enhancement film successively includes microlens structure layer, transparent substrate layer and back coating.Lenticule brightness enhancement film provided by the utility model, the covering effect that luminance gain effect can be promoted, while having been had.
Description
Technical field
The utility model relates to backlight module optical film field, in particular to a kind of lenticule brightness enhancement film.
Background technique
Brightness enhancement film is common a kind of optical film material in liquid crystal display, can be obviously improved the bright of liquid crystal display
Degree plays the role of promoting light efficiency, reduces energy consumption.Lenticule brightness enhancement film not only has high optical gain, while having scattering
The atomizing effect of light has the double effects for promoting brightness and improving covering.
The production method of microlens film uses the micro-structure metal processed usually on UV photocuring coating apparatus
The molding of die coating photocuring glue is made, and wherein the technology of most critical is the preparation of metal die.Conventional way is at present
Using the technique of laser engraving, the microlens structure of different patterns is carved out on metal roller, but for highlighted high covering
There are still Railway Projects for microlens structure: 1) highlighting the lenticule that the high lenticule covered is usually directly smaller (< 30 μm), carving
It is low to carve yield, long period.2) engraving cost is high, and the preparation of single roller may be up to hundreds of thousands processing charges, serious super
Have the monovalent cost of optical film.3) microlens structure may carry out hydridization design, structure with other prisms or pyramidal shape
The service life of roller is low, also will increase dramatically the production cost of product.
Summary of the invention
In order to solve the problems, such as that existing brightness enhancement film cannot take into account brightness and covering, the utility model provides a kind of lenticule
Brightness enhancement film.Lenticule brightness enhancement film provided by the utility model, can promote luminance gain effect, while the covering effect having had
Fruit can take into account brightness and covering.Also, preparation method provided by the utility model can lower the manufacture of microlens structure
Cost is relatively beneficial to the batch volume production production of optical film；This method solve existing microlens structure engraving difficulty it is big, engraving and
The high problem of use cost.
To achieve the above objectives, the utility model provides the following technical solutions.
The utility model provides a kind of lenticule brightness enhancement film, the brightness enhancement film include microlens structure layer, transparent substrate layer,
And back coating.
The utility model provides a kind of lenticule brightness enhancement film, and the brightness enhancement film includes transparent substrate layer, transparent substrate layer packet
Containing the first optical surface and the second optical surface, first optical surface is provided with microlens structure layer (abbreviation microstructured layers), described
Second optical surface is provided with back coating.
Further, the brightness enhancement film successively includes microlens structure layer, transparent substrate layer and back coating.
Further, the microlens structure layer includes hemispherical lens and pyramid.
Further, the microlens structure layer includes that hemispherical lens that bottom edge is regular hexagon and bottom edge are positive six sides
The pyramid of shape.Light enters by the second optical surface, then projects through the first optical surface and enter microlens structure layer.
Further, the hemispherical lens, a length of 10-70 μm of bottom edge, hemispherical height are 5-35 μm.The pyramid
Bottom side length be also 10-70 μm, pyramid heights be 5-33 μm.
Further, the hemispherical lens, a length of 20-50 μm of bottom edge, hemispherical height are 10-25 μm.The rib
The bottom side length of cone is also 20-50 μm, and pyramid heights are 10-23 μm.Preceding solution includes embodiment 5-10.
Further, the hemispherical lens, a length of 25-35 μm of bottom edge, hemispherical height are 12-17 μm.The rib
The bottom side length of cone is also 25-35 μm, and pyramid heights are 11-17 μm.Preceding solution includes embodiment 8-10.
Further, the longitudinal cross-section of the pyramid is in isosceles triangle, and the apex angle of triangle is 60-100 degree.
The hemispherical lens is alternatively arranged with pyramid.Further, hemispherical lens and pyramid be between the column and the column or
It is capable to be alternatively arranged between row.Between be divided into 1 row's hemispherical lens, multiple rows of pyramid is composed.
Further, the unit that is alternatively arranged of hemispherical lens and pyramid is 1 row's hemispherical lens and 1 to 10 row's pyramid.
That is, permutation and combination is 1 row's hemispherical lens, 1 to 10 row's pyramid is composed.
Further, permutation and combination is 1 row's hemispherical lens, and 1 to 4 row's pyramid is composed.
The height of the hemispherical lens will be at or above the height of pyramid.Further, the height of pyramid is about
The 80-100% of hemispherical lens height.Further, the height of pyramid is about the 85-100% of hemispherical lens height.Into one
Step, the height of pyramid is about the 92-100% of hemispherical lens height.
Further, the transparent substrate may be selected from polyethylene terephthalate (PET), polycarbonate (PC),
Polyvinyl chloride (PVC) or polymethyl methacrylate (PMMA), thickness may be selected from 50-300 μm.The micro-structure layer choosing
Select the cured acrylic resin of UV.Further, the material methyl acrylate of the microlens structure layer, bisphenol-A dipropyl
Olefin(e) acid ester, aliphatic urethane acrylate, ethoxylated bisphenol A dimethylacrylate, biphenylmethanol acrylate, adjacent phenyl
One of phenoxyethyl acrylate or 2- phenoxyethyl methacrylate or a variety of combinations.
The liquid refractivity of the microstructured layers UV resin is selected from 1.44-1.60.Further, the microstructured layers UV
The liquid refractivity of resin is selected from 1.46-1.56.Further, the refractive index of UV resin is selected from 1.48-1.52.
The utility model also provides the preparation method of the lenticule brightness enhancement film, and the method includes the following steps:
(1) engraving of microlens structure: the microlens structure combination of shaping, this structure are concavity on metal roller
Structural style (former)；
(2) overmolded replicates mantle mother matrix: the micro-structure roller obtained to step (1) passes through hot padding or UV solidified imprinting
Mode, substrate surface formed convex microlens structure layer (formpiston)；
(3) first generation metal mother electroforming: the mantle mother matrix that step (2) is obtained first plates master surfaces micro-structure
One layer of thin conductive layer；Then the micro-structure mother matrix of conductive layer is coated with as cathode using above-mentioned surface, carried out in electroforming tank electroforming with
Obtain first generation metal mother；
(4) first generation metal mother is as original version, can be by above-mentioned steps 3 after carrying out cleaning activation) electroforming side
Method obtains second generation metal mother (anode membrane) using second of electroforming；Second generation metal mother is passed through into third time electroforming,
Third generation metal mother is obtained, the sub- version that also referred to as works (former)；After the cleaned drying of the sub- version that works, for suppressing micro-structure
Layer.
The utility model also provides the preparation method of lenticule brightness enhancement film, and the method includes the following steps:
(1) engraving of microlens structure: the microlens structure combination of shaping, this knot on columned metal roller
Structure is concave structural style (former)；
(2) overmolded replicates mantle mother matrix: the micro-structure roller obtained to step (1), by carrying out UV on the surface of substrate
Glue application, micro-structure coining, the solidification of UV light source form the microlens structure layer (formpiston) of convex on the surface of substrate；
(3) first generation metal mother electroforming: the mantle mother matrix that step (2) is obtained, first passing through magnetron sputtering mode will be female
Version surface micro-structure plates one layer of thin conductive layer；Then the micro-structure mother matrix of conductive layer is coated with as cathode, with nickel using above-mentioned surface
Piece carries out electroforming in electroforming tank as anode to obtain first generation nickel matter metal mother；
(4) first generation metal mother, can be by above-mentioned steps 3 after carrying out ultrasonic cleaning activation as original version) electricity
Casting method obtains second generation metal mother (anode membrane) using second of electroforming；By second generation metal mother by third time electricity
Casting, obtains third generation metal mother, the sub- version that also referred to as works (former)；Sub- version work after deionized water is clearly dried, uses
In the microlens structure layer of compacting lenticule brightness enhancement film.
Further, the preparation method includes the following steps:
(1) engraving of microlens structure: by way of laser engraving, the shaping on columned metal roller
Microlens structure combination, this structure are concave structural style (former).The roller surface material of engraving can select copper, nickel,
The metal materials such as chromium.Further, the diameter of metal roller can choose 200-300mm.
(2) overmolded replicates mantle mother matrix: to aforementioned micro-structure roller, passing through UV glue application, micro-structure coining, UV light source
Solidification forms the microlens structure layer (formpiston) of convex on the surface of transparent substrate.Further, substrate can select two-way drawing
PET is stretched, surface need to may be selected by chemical treatment, thickness from 250-300 μm.
(3) first generation metal mother electroforming: by above-mentioned mantle mother matrix, magnetron sputtering mode is first passed through by the micro- knot of master surfaces
Structure plates one layer of thin conductive layer.Conductive layer can select copper, nickel or silver metal material.The thickness control of conductive layer is in 100-
1000nm.Then the micro-structure mother matrix of conductive layer is coated with as cathode using above-mentioned surface, using nickel sheet as anode, in electroforming tank into
Row electroforming is to obtain first generation nickel matter metal mother.Further, the thickness control of metal mother is between 100-300 μm.Into
One step, mantle mother matrix be it is planar, according to different liquid crystal module sizes, cut into corresponding size, length is in 800mm-
Between 2200mm, width is between 600mm-1400mm.
(4) first generation metal mother, can be by above-mentioned steps 3 after carrying out ultrasonic cleaning activation as original version) electricity
Casting method obtains second generation metal mother (anode membrane) using second of electroforming.By second generation metal mother by third time electricity
Casting, obtains third generation version, the sub- version that also referred to as works (former).Sub- version work after deionized water is clearly dried, can put into
It uses.Further, the thickness control for the sub- version that works is at 50-150 μm.Further, the length and wide cut for the sub- version that works according to
Client uses size, can cut into corresponding size.Further, length is between 1000mm-2000mm, and width is in 680mm-
Between 1200mm.
Further, electroforming use can be repeated several times in the first generation and second generation metal mother, recycle preparation work version.
(5) the sub- version that works is coated on metal roller production structure roller: the sub- version of above-mentioned plane work is glued by double faced adhesive tape
The mode of patch is coated on the outer wall of roller, or the sub- version of above-mentioned plane work first can be fabricated to hollow cylinder-shaped sleeve, then
Sleeve is sleeved on roller, required structure roller can be fabricated to.Further, the seam crossing that coated roller cylinder is formed, or system
Make joint treatment when hollow cylinder-shaped sleeve, carried out by the way of laser welding, then diameter polishes smoothing processing.
(6) by cladding or the roller and roller direct engraving structure indifference of suit processing, UV can directly be used
Adhesive curing molding, in the first optical surface profile of substrate at final microlens structure layer.
The utility model has the beneficial effects that: being designed by structure, takes a kind of hemispherical microlenses and pyramid is handed over
For the design method of arrangement, so that microlens structure has higher brightness, and good covering effect is maintained.This reality
With novel while providing a kind of technical solution, it is only necessary to which the primary original roll mould of engraving can significantly reduce original mould
Carve cost.Conventional method produces every time is required to engraved die again, at high cost and can not be effectively reduced.The utility model
In technical solution, the mode of electroforming is taken, can be replicated by an original mould by electroforming, repetition obtains countless Zhang Gongs
Make sub- version, sub- version is coated on roller by that will work, and effect structure identical as direct engraving roller and production may be implemented
Effect.And electroforming is low in cost, greatly reduces the structure fabrication and production cost of conventional method, has continuous production.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of conventional microlens brightness enhancement film；
Fig. 2 is the structural schematic diagram of lenticule brightness enhancement film provided by the utility model；
Fig. 3 is the planar alignment schematic diagram of microlens structure provided by the utility model；
Fig. 4 is microlens structure electroforming flow diagram provided by the utility model.
Specific embodiment
The utility model is described in further detail below in conjunction with specific embodiments and drawings, it is necessary to be pointed out that this
Embodiment is served only for that the utility model is further detailed, and should not be understood as the limit to scope of protection of the utility model
System.
As shown in Figure 1, conventional microlens brightness enhancement film includes substrate layer 10, microstructured layers 11 and back coating 12.
As shown in Figures 2 and 3, the utility model provides a kind of lenticule brightness enhancement film, and the brightness enhancement film includes transparent substrate
Layer 20, transparent substrate layer 20 have the first optical surface and the second optical surface, and first optical surface is provided with microlens structure layer
21, second optical surface is provided with back coating 22.The microlens structure layer 21 includes microlens structure 31 and pyramidal structure
32。
Fig. 4 is microlens structure electroforming flow diagram provided by the utility model.Wherein, 40 be the initial of laser engraving
Metallic roll concave architecture.50 be the mantle mother matrix of first time overmolded, convex architecture layer.51 be the sputter on convex mantle mother matrix
Conductive layer.60 be first generation nickel matter metal mother, concave architecture.70 be second generation metal mother, convex architecture.80 be the third generation
Metal mother, also referred to as work sub- version, is concave architecture.X1, x2, x3 be by 70 mother matrixs repeatedly electroforming obtain mostly for sub- version
Simply.
The main performance for the lenticule brightness enhancement film that the utility model embodiment and comparative example provide is tested in the following manner
And reduced parameter.
1, luminance gain is tested: using specific backlight, the brightness for testing a conventional microlens brightness enhancement film is L0, then survey
The brightness for trying the lenticule brightness enhancement film of the utility model is L1, then the luminance gain of the lenticule brightness enhancement film of the invention is L1/L0。
2, micro-structure processing cost/square metre: conventional method be 1 roller of every engraving once produced, then be processed into
This is the processing cost of this roller and the ratio of production rice number.The utility model method is that engraving 1 female roller can be with electroforming
Multiple work versions, each work version can Continuous maching production, then processing cost is that the engraving cost of 1 female roller adds
The cost summation for powering on casting working version, the ratio with the summation for the sub- version continuous production rice number that works.With the production cost of comparative example 1
It is 100%, the ratio of the production cost for the brightness enhancement film that the production cost and comparative example 1 of brightness enhancement film provided by the embodiments of the present application provide
Value is denoted as the production cost of brightness enhancement film provided by the embodiments of the present application.
3, covering: the diaphragm cut out is assembled into down straight aphototropism mode set, and after lighting backlight module, vertical angle is seen
Examine the covering degree and diffusion effect of lamp bead on display screen.Opinion rating: excellent > good > preferably > poor.
Micro-structure brightness enhancement film provided by the utility model is further illustrated below in conjunction with embodiment.
The technical parameter of embodiment 1-10 is as shown in following table 1.
The technical parameter for the micro-structure brightness enhancement film that 1 embodiment 1-10 of table is provided
Note: the transparent substrate for the lenticule brightness enhancement film that embodiment 1-10 is provided is the PET with a thickness of 250 μm.
Comparative example 1
Microlens structure, and the method for suppressing microstructured layers using the structure are carved out on metal roller according to existing
A kind of brightness enhancement film is prepared, the microstructured layers of the brightness enhancement film are made of hemispherical lens, and microstructured layers do not have pyramidal structure.Technology
Parameter is as shown in Table 2 below.
The technical parameter for the brightness enhancement layer in brightness enhancement film that 2 comparative example 1 of table provides
The main performance testing result for the brightness enhancement film that 3 the utility model embodiment of table and comparative example provide
| Luminance gain | Covering | Angle of visibility | Production cost | |
| Embodiment 1 | 1.65 | It is excellent | 102° | 20% |
| Embodiment 2 | 1.93 | Well | 82° | 20% |
| Embodiment 3 | 1.78 | Well | 88° | 25% |
| Embodiment 4 | 1.95 | Preferably | 78° | 30% |
| Embodiment 5 | 1.7 | It is excellent | 98° | 26% |
| Embodiment 6 | 1.9 | It is excellent | 82° | 22% |
| Embodiment 7 | 1.74 | It is excellent | 92° | 20% |
| Embodiment 8 | 1.78 | It is excellent | 89° | 22% |
| Embodiment 9 | 1.85 | It is excellent | 94° | 20% |
| Embodiment 10 | 1.75 | It is excellent | 86° | 20% |
| Comparative example 1 | 1.70 | It is excellent | 98° | 100% |
By the test result of above-described embodiment and comparative example, it can be concluded that, preparation method provided by the utility model can subtract
The manufacturing cost of humble lens arrangement is relatively beneficial to the batch volume production production of optical film；This method solve existing lenticule knots
It is big that structure carves difficulty, engraving and the high problem of use cost.Also, lenticule brightness enhancement film provided by the utility model, Ke Yiti
Rise luminance gain effect, while the covering effect having had.Wherein, what the lenticule brightness enhancement film that embodiment 5-10 is provided had had
Luminance gain effect (at least 1.7), the covering of " excellent " and biggish angle of visibility (at least 82 °), and production cost is 20%-
26%, good combination property.Wherein, the lenticule brightness enhancement film that embodiment 8-10 is provided has better luminance gain effect (at least
1.75), biggish angle of visibility (at least 86 °) and production cost are 20%-22%, and comprehensive performance is more preferable.
The above, the only preferred embodiment of the utility model, are not intended to limit the protection of the utility model
Range.All equivalent changes and modifications done according to the content of the present invention, are encompassed by the scope of the patents of the utility model
It is interior.
Claims (7)
1. a kind of lenticule brightness enhancement film, which is characterized in that the brightness enhancement film includes microlens structure layer, transparent substrate layer and back
Coating；
The microlens structure layer includes hemispherical lens and pyramid, and the hemispherical lens and pyramid are between the column and the column or to go
It is alternatively arranged between row, the height of the hemispherical lens is at or above the height of pyramid.
2. lenticule brightness enhancement film according to claim 1, which is characterized in that the microlens structure layer is positive including bottom edge
The hemispherical lens of hexagon and bottom edge are the pyramid of regular hexagon.
3. lenticule brightness enhancement film according to claim 2, which is characterized in that the hemispherical lens, a length of 10- in bottom edge
70 μm, hemispherical height is 5-35 μm；The bottom side length of the pyramid is also 10-70 μm, and pyramid heights are 5-33 μm.
4. lenticule brightness enhancement film according to claim 2, which is characterized in that the hemispherical lens, a length of 20- in bottom edge
50 μm, hemispherical height is 10-25 μm；The bottom side length of the pyramid is also 20-50 μm, and pyramid heights are 10-23 μm.
5. lenticule brightness enhancement film according to claim 2, which is characterized in that the hemispherical lens, a length of 25- in bottom edge
35 μm, hemispherical height is 12-17 μm；The bottom side length of the pyramid is also 25-35 μm, and pyramid heights are 11-17 μm.
6. lenticule brightness enhancement film according to claim 1, which is characterized in that hemispherical lens and pyramid are alternatively arranged list
Member is 1 row's hemispherical lens and 1 to 10 row's pyramid.
7. lenticule brightness enhancement film according to claim 1, which is characterized in that the height of the pyramid is about hemispherical lens
The 80-100% of height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822195267.7U CN209514106U (en) | 2018-12-26 | 2018-12-26 | A kind of lenticule brightness enhancement film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822195267.7U CN209514106U (en) | 2018-12-26 | 2018-12-26 | A kind of lenticule brightness enhancement film |
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| Publication Number | Publication Date |
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| CN209514106U true CN209514106U (en) | 2019-10-18 |
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| CN201822195267.7U Active CN209514106U (en) | 2018-12-26 | 2018-12-26 | A kind of lenticule brightness enhancement film |
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