CN106468842A - Birefringent lens film and its manufacture method - Google Patents
Birefringent lens film and its manufacture method Download PDFInfo
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- CN106468842A CN106468842A CN201611222793.7A CN201611222793A CN106468842A CN 106468842 A CN106468842 A CN 106468842A CN 201611222793 A CN201611222793 A CN 201611222793A CN 106468842 A CN106468842 A CN 106468842A
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- birefringent
- protective layer
- layers
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- 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
- G02F1/29—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 position or the direction of light beams, i.e. deflection
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- 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
Abstract
The invention provides a kind of birefringent lens film and its manufacture method, belong to display technology field.The birefringent lens film that the present invention provides includes first substrate, both alignment layers, birefringent layers and the protective layer being cascading.The surface relative with protective layer of birefringent layers has the first micro structure, and the surface relative with birefringent layers of protective layer has second micro structure corresponding with the first micro structure.In the ordinary refraction index of birefringent layers and extraordinary ray refractive index, the absolute value of any one difference and the refractive index of protective layer between is less than preset value.Additionally, present invention also offers a kind of birefringent lens film manufacturing method, for manufacturing above-mentioned birefringent lens film.The birefringent lens film that the present invention provides and its manufacture method can not only repair hole that may be present at the first micro structure of birefringent layers effectively, and the production yield improving product is scratched additionally it is possible to be effectively prevented from birefringent layers.
Description
Technical field
The present invention relates to display technology field, in particular to a kind of birefringent lens film and its manufacture method.
Background technology
For the technology application of bore hole 3D 3 d display device, typically in all kinds of large scale advertisement machine fields.Consider
The factors such as cost, manufacture difficulty, application scenarios, it is common to use be post lens type 3 d display device, this class stereo display
Device generally only shows to 3D and is distinctly claimed, substantially without the application of 2D scene.And it is applied to individual consumer's goods field
3 d display device such as 3D mobile phone, 3D flat board, 3D display or all-in-one etc., while realizing required 3D function,
Need to take into account 2D display effect, such as the Specifeca tion speeification such as resolution, brightness can not have obvious reduction.Therefore, it is possible to carry out
The stereo display technique of the 2D/3D free switching such as electrooptical device such as liquid crystal slit, liquid crystal lens, birefringence liquid crystal lens has
More application.2D/3D can in the stereo display technique of free switching, can sacrifice under liquid crystal slit 3D pattern display brightness,
Liquid crystal lens rest on small size screen such as field of mobile phones because of technical reason, by contrast birefringence liquid crystal lens have more excellent
Gesture, carries out 3D/2D as can be locally opened a window and shows, substantially can not be subject to shadow in small size and the application of middle size field, 3D brightness
Ring.Birefringent lens film, as the most important device of birefringence liquid crystal lens 3 d display device, is provided with and is mature on the whole
Batch production technique.
However, in existing birefringent lens film processing procedure, birefringent layers and the interface of Grating Film easily form vacuum gas
Bubble, leads to birefringent layers to form the hole that cannot repair, the using effect of impact birefringent lens film in this interface.Additionally,
In existing birefringent lens film, birefringent layers are located at the surface of birefringent lens film, easily cause birefringent layers scuffing etc. no
Good.
Content of the invention
In view of this, it is an object of the invention to provide a kind of birefringent lens film and its manufacture method, effectively to change
Kind the problems referred to above.
To achieve these goals, the technical solution used in the present invention is as follows：
On the one hand, embodiments provide a kind of birefringent lens film, including the first substrate being cascading,
Both alignment layers, birefringent layers and protective layer, the surface relative with described protective layer of described birefringent layers has the first micro structure, institute
The surface relative with described birefringent layers stating protective layer has second micro structure corresponding with described first micro structure, described double
Refracting layer has ordinary refraction index and extraordinary ray refractive index, in described ordinary refraction index and described extraordinary ray refractive index
The absolute value of any one difference and the refractive index of described protective layer between is less than preset value.
In preferred embodiments of the present invention, above-mentioned ordinary refraction index or extraordinary ray refractive index and described protective layer
Refractive index is equal.
In preferred embodiments of the present invention, above-mentioned first micro structure includes multiple repetitives, the plurality of repetition list
Unit is in array distribution.
In preferred embodiments of the present invention, the surface opposite with described birefringent layers of above-mentioned protective layer is parallel to described
First substrate.
On the other hand, the embodiment of the present invention additionally provides a kind of birefringent lens film manufacturing method, and methods described includes：?
Alignment layer surface on first substrate is coated with the liquid crystal material of liquid, to form birefringent layers；By described birefringent layers and grating
Mould is fitted, and wherein, the surface fitted with described birefringent layers of described grating mold has default micro structure；To fit
Described first substrate after described grating mold is placed so that described liquid crystal material is pressed close under gravity according to preset rules
Described both alignment layers carry out orientation；Described birefringent layers are solidified to be fitted with described grating mold in described birefringent layers
First surface formed corresponding to described default micro structure the first micro structure；By described grating mold from described birefringent layers
First surface is peeled off, and forms protective layer in described first surface, to form described birefringent lens film.
In preferred embodiments of the present invention, the surface relative with described first surface of above-mentioned protective layer have with described
Corresponding second micro structure of first micro structure, the surface opposite with described first surface of described protective layer is parallel to described first
Substrate.
In preferred embodiments of the present invention, the above-mentioned step forming protective layer in described first surface, including：Institute
State the protective layer material formation coating layer that first surface is coated with liquid；Described coating layer is carried out solidifying to form described protective layer.
In preferred embodiments of the present invention, the above-mentioned step forming protective layer in described first surface, including：?
The protective layer material of two substrate surface coating fluid states forms coating layer；By the first surface of described birefringent layers and described coating layer
Laminating；Described coating layer is carried out solidifying to form described protective layer.
In preferred embodiments of the present invention, the above-mentioned step described coating layer being carried out solidify to form described protective layer
Afterwards, also include：By described second substrate from the described protective layer sur-face peeling opposite with described first surface.
In preferred embodiments of the present invention, above-mentioned by the described first substrate after described grating mold of fitting according to pre-
If rule is placed so that described liquid crystal material presses close to the step that described both alignment layers carry out orientation under gravity, including：To paste
Close the described first substrate after described grating mold to be toasted, wherein, described first substrate is located under described grating mold
Side, described liquid crystal material press close to described both alignment layers under gravity so that liquid crystal molecule in the presence of described both alignment layers according to
Preset direction arranges.
Different from the structure of existing birefringent lens film, birefringent lens film provided in an embodiment of the present invention and its manufacture
Method is passed through setting protective layer and the surface hole that may be present with the first micro structure of birefringent layers is repaired, it is to avoid
These holes impact to the using effect of birefringent lens film, improve the production yield of product.Additionally, birefringent layers are located at
Between both alignment layers on first substrate and protective layer, efficiently avoid birefringent layers, directly to expose the birefringent layers leading to easy
The bad problem such as it is scratched.
Brief description
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be attached to use required in embodiment
Figure is briefly described it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, and it is right to be therefore not construed as
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 shows the structural representation of existing birefringent lens film；
Fig. 2 shows the fabrication processing figure of existing birefringent lens film；
Fig. 3 shows a kind of structural representation of birefringent lens film that first embodiment of the invention provides；
Fig. 4 shows a kind of method flow diagram of birefringent lens film manufacturing method that second embodiment of the invention provides；
Fig. 5 shows a kind of process chart of the birefringent lens film manufacturing method that second embodiment of the invention provides；
Fig. 6 shows another kind of technological process of the birefringent lens film manufacturing method that second embodiment of the invention provides
Figure.
Specific embodiment
Fig. 1 shows the structural representation of existing birefringent lens film 10.This birefringent lens film 10 includes flexible base
Plate 1, be arranged on flexible base board 1 surface micro structure 2 and with the birefringent layers 4 being arranged on this micro structure 2 surface.Birefringent layers
The surface of 4 close flexible base board 1 is curved surface 3, together with that is, micro structure 2 is fitted tightly with birefringent layers 4, birefringent layers 4
Surface away from flexible base board 1 is plane.
Fig. 2 shows the fabrication processing figure of existing birefringent lens film 10.As shown in (I) figure in Fig. 2, using rubbing
Wipe roller 7 and carry out the groove that mechanical friction forms specific direction, (II) figure in such as Fig. 2 in PI (Polyimide) glass surface
Shown.Wherein, PI glass includes matrix material such as glass substrate 5 and the alignment film 6 being printed on glass substrate 5 surface.Friction
After the completion of, form light refraction layer, (III) in such as Fig. 2 in the birefringent material of the alignment film 6 surface coating liquid crystalline state of PI glass
Shown in figure.Further, as shown in (IV) figure in Fig. 2, Grating Film (is included flexible base board 1 and is arranged on flexible base board 1 table
The micro structure 2 in face) cover on the surface of birefringent layers 4, and pressed using roller, rolling (is placed in PI by platform of fitting
The lower section of glass, in figure is not drawn into) complete with the relative motion of roller.Wherein, Grating Film include flexible base board 1 be arranged on soft
The micro structure 2 on property substrate 1 surface.After pressing finishes, as shown in (V) figure in Fig. 2, by PI glass, birefringent layers 4, Grating Film
The sandwich structure being formed carries out high-temperature baking and is easy to orientation, and during baking, PI glass side is placed down.After the completion of orientation, two-fold
The liquid crystal molecule penetrated in layer 4 is arranged along above-mentioned specific direction, as shown in (VI) figure in Fig. 2.Hereafter, as in Fig. 2
(VII) shown in figure, using ultraviolet (UV) light, birefringent layers 4 are irradiated, so that birefringent layers 4 is solidified.Finally, as in Fig. 2
(VIII) shown in figure, Grating Film and birefringent layers 4 are stripped down from PI glass surface, obtain the birefringent lens film 10 of needs.
During above-mentioned high-temperature baking, birefringent layers 4 are in mesomorphic birefringent material and make in self gravitation
With the lower alignment film 6 that can move closer on PI glass, Grating Film also has a certain degree of expansion, frequently results in birefringence after baking
Layer 4 is bubbles of vacuum at curved surface 3 with the interface of Grating Film.Because this bubbles of vacuum is in Grating Film and birefringent layers 4
Interface on, this bad cannot repair so that the birefringent layers 4 after solidifying have hole at curved surface 3, reduce two-fold
Penetrate the production yield of lens coating 10.Additionally, in existing birefringent lens film 10, birefringent layers 4 directly expose, due to birefringent layers
4 hardness are relatively low, easily cause scuffing etc. various bad, the using effect of impact birefringent lens film 10.
In view of the above problems, a kind of birefringent lens film and its manufacture method are embodiments provided.Below will be right
Birefringent lens film provided in an embodiment of the present invention and its manufacture method are described in detail.Obviously, described embodiment is
The a part of embodiment of the present invention, rather than whole embodiments.The present invention generally described and illustrated in accompanying drawing herein is implemented
The assembly of example can be arranged with various different configurations and design.Therefore, the reality to the present invention providing in the accompanying drawings below
The detailed description applying example is not intended to limit the scope of claimed invention, but is merely representative of the selected enforcement of the present invention
Example.Based on the embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of not making creative work
Every other embodiment, broadly falls into the scope of protection of the invention.
It should be noted that：Similar label and letter represent similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then do not need it to be defined further and explains in subsequent accompanying drawing.
In describing the invention, it should be noted that term " on ", the orientation of instruction such as D score or position relationship be base
In orientation shown in the drawings or position relationship, or the orientation usually put when this invention product uses or position relationship, only
It is for the ease of the description present invention and to simplify description, rather than the device of instruction or hint indication or element must have specifically
Orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.Additionally, term " first ", " the
Two " etc. it is only used for distinguishing description, and it is not intended that instruction or hint relative importance.
In describing the invention in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " setting ",
" connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；Can be
It is mechanically connected or electrically connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal.For the ordinary skill in the art, above-mentioned term can be understood in the present invention with concrete condition
In concrete meaning.
First embodiment
First embodiment of the invention provides a kind of birefringent lens film.As shown in figure 3, this birefringent lens film 100 wraps
Include the first substrate 50 being cascading, both alignment layers 60, birefringent layers 40 and protective layer 20.
In the present embodiment, first substrate 50 is the flexible base board with light transmission features, and for example, this flexible base board can be poly-
Terephthaldehyde's ethyl glycol fat (PET) substrate, flexible glass etc..
Both alignment layers 60 are arranged at the surface of first substrate 50, and alignment layer material can be polyimides.Both alignment layers 60 are permissible
It is the polyimide material of liquid to be coated the surface of first substrate 50 and is formed after being dried or directly that polyamides is sub-
The surface that amine film is transferred to first substrate 50 is formed.The first surface of both alignment layers 60 is fitted with the second surface of birefringent layers 40,
The second surface of both alignment layers 60 is fitted with first substrate 50.It is understood that the first surface of both alignment layers 60 to have orientation micro-
Structure, for example, described alignment microstructure can be pre- in advance the first surface of both alignment layers 60 is carried out with the edge of friction matching formation
The orientation groove of set direction arrangement.
In the present embodiment, birefringent layers 40 are formed by liquid crystal material, and in birefringent layers 40 liquid crystal molecule arragement direction
Determined by the alignment microstructure of the first surface of both alignment layers 60.When this alignment microstructure is the orientation groove along preset direction arrangement
When, the major axis of liquid crystal molecule 43 arranges also along above-mentioned preset direction.
As shown in figure 3, the first surface 41 of birefringent layers 40 has the first micro structure.First micro structure includes multiple repetitions
Unit is it is preferred that multiple repetitives are in array distribution.In the present embodiment, the section 42 of repetitives can for arc surface (such as
Shown in Fig. 3), parabola, trapezoidal faces, triangular facet etc..It should be noted that repetitives can be convex surface or concave surface,
Specifically can according to user need design.
Accordingly, i.e. relative with birefringent layers 40 surface of the second surface of protective layer 20 have corresponding with the first micro structure
The second micro structure.The protuberance that first micro structure and the second micro structure are in concaveconvex structure, and the first micro structure is micro- with second
Recess laminating in structure, as shown in Figure 3.Protective layer 20 can be by having high permeability and the preferable resin of mobility such as third
The materials such as olefin(e) acid ester, polyurethane are constituted.Specifically generation type can be：By modes such as scraper for coating or spin coatings by liquid
The resin-coated first surface 41 to birefringent layers 40 and formed after solidifying.Preferably, the minimum thickness of coating is protective layer
First micro structure of the first surface 41 of birefringent layers 40 can be filled into even curface that is to say, that protective layer 20 by 20
I.e. opposite with birefringent layers 40 surface of second surface is parallel to first substrate 50.Can effectively be repaiied by arranging protective layer 20
The hole existing at multiple birefringent layers 40 first surface being led to due to technological reason is it is also possible to be effectively prevented from birefringent layers 40
Directly expose the bad problems such as the scuffing leading to.
Due to the anisotropic of liquid crystal material, birefringent layers 40 have birefringence effect, that is, have ordinary refraction index and
Extraordinary ray refractive index.In ordinary refraction index and described extraordinary ray refractive index, any one is and the refractive index of protective layer 20 between
Difference absolute value be less than preset value.This preset value can according to user need arrange, for example, it is possible to be set to
0.03.Preferably, the refractive index of protective layer 20 is equal with ordinary refraction index, or, the refractive index of protective layer 20 and extraordinary
Optical index is equal.When the birefringent lens film that the present embodiment provides is applied to bore hole 3D 3 d display device it is assumed that ordinary
Optical index is no, and extraordinary ray refractive index is ne, in order to obtain optimal viewing distance it is preferred that | ne-no |>0.1.
For example, refractive index n of protective layer 20 is equal with ordinary refraction index no.When a branch of line polarized light is from first substrate 50
Birefringent lens film 100 is incided in side, and its direction of propagation is perpendicular to first substrate 50 and direction of vibration and birefringent layers 40
When liquid crystal molecular orientation direction is consistent, for birefringent layers 40, because direction of vibration and the liquid crystal molecule of this line polarized light are long
Axle arrangement is consistent, and its refractive index is ne, and the refractive index of protective layer 20 is n, and ne>N, therefore incident illumination is in birefringent layers 40 and guarantor
The interface of sheath 20 occurs refraction to converge because of the difference of refractive index, it is possible to achieve the separation of incident illumination difference information.Therefore, originally
When the birefringent lens film 100 that embodiment provides is applied to 3 d display device, right and left eyes information can be separated, produce stereopsis
Feel.
Anaclasis lens coating provided in an embodiment of the present invention passes through to arrange protective layer 20 and has first to birefringent layers 40
The surface hole that may be present of micro structure is repaired, and improves the production yield of product.Additionally, it is provided in an embodiment of the present invention
In birefringent lens film, birefringent layers 40 be located at first substrate 50 on both alignment layers 60 and protective layer 20 between, be effectively prevented from
Birefringent layers 40 directly expose the birefringent layers 40 leading to and the bad problem such as scratch.
Second embodiment
Second embodiment of the invention provides a kind of birefringent lens film 100 for manufacturing above-mentioned first embodiment offer
Manufacture method.As shown in figure 4, the birefringent lens film manufacturing method that the present embodiment provides includes：
Step S110, the liquid crystal material of alignment layer surface coating liquid on the first substrate, to form birefringent layers；
First substrate 50 is the flexible base board with light transmission features, and for example, this flexible base board can be pet substrate, flexibility
Glass etc..Both alignment layers 60 are arranged at the surface of first substrate 50, and this both alignment layers 60 can be polyimide film.
It is understood that in addition it is also necessary in advance to the first surface of both alignment layers 60 i.e. away from first before step S110
The surface of substrate 50 carries out orientation process and forms alignment microstructure.For example, described orientation processes and can process for friction matching.As
Shown in (I) figure in Fig. 5, the first surface of both alignment layers 60 can be rubbed according to preset direction using friction roller 70,
The outer surface of friction roller 70 is enclosed with Villus cloth, thus the first surface in both alignment layers 60 was formed along joining that preset direction extends
To groove, as shown in (II) figure in Fig. 5.
Complete both alignment layers 60 orientation process after in addition it is also necessary to be carried out to both alignment layers 60.Produce in prevention water-washing process
Raw both alignment layers 60 come off etc. bad, it is preferred to use dry clean, such as ultrasound wave cleaning.
Hereafter, the first surface coating of liquid crystalline material in both alignment layers 60 forms birefringent layers 40, as (III) figure institute in Fig. 5
Show.Liquid crystal material includes room temperature liquid liquid crystal and room temperature solid-state liquid crystal, needs to apply after melting for room temperature solid-state liquid crystal again
Cloth.Therefore, in the present embodiment, liquid crystal material preferably employs room temperature liquid liquid crystal.Specifically, coating method can be applied using slit
Cloth, Multi needle coating etc..
Step S120, described birefringent layers are fitted with grating mold, wherein, described grating mold double with described
The surface of refracting layer laminating has default micro structure；
In step S120, the birefringent lens film 100 that the size and dimension of grating mold 80 manufactures as needed designs, can
To be used for multiple times.Specifically, grating mold 80 can be imprinted with technology and optical resin extruding is formed default micro structure then
Solidification obtains.It should be noted that grating mold 80 should have relatively low thermal coefficient of expansion.
As shown in (IV) figure in Fig. 5, the birefringent layers 40 of the both alignment layers 60 surface coating of first substrate 50 are fitted in
On the default micro structure of grating mold 80.In the present embodiment, the first surface of grating mold 80 has default micro structure, grating
The second surface of mould 80 is burnishing surface.Preferably laminating type is to move along v direction using roller 30 to be pressed, during pressing
The second surface of grating mold 80 lies in laminating platform (not shown), by the relative fortune that platform is with roller 30 of fitting
Move and the default micro structure of birefringent layers 40 and the first surface of grating mold 80 fits together.Obviously, birefringent layers 40
Coating thickness must be enough to fill this default micro structure, so that being formed pre- corresponding to this at the first surface 41 of birefringent layers 40
If the first micro structure of micro structure.
Step S130, the described first substrate after described grating mold of fitting is placed so that described liquid according to preset rules
Brilliant material is pressed close to described both alignment layers under gravity and is carried out orientation；
In order to accelerate the orientation speed of liquid crystal molecule, by fitting, described grating mold described first substrate 50 after 80s is carried out
Baking, baking temperature and baking time are according to liquid crystal material featured configuration.For example, baking temperature could be arranged to 50～105 DEG C
Between, baking time could be arranged to 5～30 minutes.In step S130, first substrate 50 is placed according to preset rules and specifically may be used
Think：As shown in (V) figure in Fig. 5, during baking, first substrate 50 is located at the lower section of grating mold 80, and first substrate 50 is placed in
On flat surface, liquid crystal material presses close to the first surface of both alignment layers 60 under gravity, so that liquid crystal molecule 43 is in both alignment layers
Arrange according to preset direction in the presence of 60 alignment microstructure.
Described birefringent layers are solidified to be fitted with described grating mold in described birefringent layers by step S140
First surface forms the first micro structure corresponding to described default micro structure；
After orientation terminates, because birefringent layers 40 are still the liquid crystal material of liquid, therefore also need to birefringent layers 40 are entered
Row solidification.In the present embodiment, ultraviolet (UV) photoirradiation curing mode can be adopted.For example, as shown in (VI) figure in Fig. 5, can
To carry out ultraviolet irradiation from grating mold 80 side to birefringent layers 40, birefringent layers 40 are made to solidify, in birefringent layers 40 after solidification
Liquid crystal molecule 43 orientation keep constant.It is of course also possible to ultraviolet irradiation be carried out to birefringent layers 40 from first substrate 50 side,
Birefringent layers 40 are made to solidify.For the direction of UV light, do not limit herein.
After birefringent layers 40 solidification, then can fit with grating mold 80 in the first surface 41 of birefringent layers 40
Surface forms the first micro structure corresponding to above-mentioned default micro structure.Described first micro structure includes multiple repetitives, preferably
, multiple repetitives are in array distribution.The section 42 of each repetitive can be for arc surface (as (VII) figure institute in Fig. 5
Show), parabola, trapezoidal faces, triangular facet etc..It should be noted that repetitives can be convex surface or concave surface, specifically
Can according to user need design.Obviously, the shape of the first micro structure birefringent layers 40 being formed is (as each repetitive
Width, highly, the parameter such as radius of curvature) determined by the shape of the default micro structure on grating mold 80.
Due to the anisotropic of liquid crystal material, birefringent layers 40 have birefringence effect, that is, have ordinary refraction index and
Extraordinary ray refractive index.Hypothesis ordinary refraction index is no, and extraordinary ray refractive index is ne, the birefringence providing when the present embodiment
When lens coating is applied to bore hole 3D 3 d display device, in order to obtain optimal viewing distance it is preferred that | ne-no |>0.1.
Step S150, described grating mold is peeled off from the first surface of described birefringent layers, and in described first surface
Form protective layer, to form described birefringent lens film.
Due in the present embodiment grating mold 80 as the mould forming above-mentioned first micro structure in birefringent layers 40, not
It is a part for birefringent lens film 100 to be produced, therefore after the completion of birefringent layers 40 solidification, need grating mold 80
Remove.Because compared to first substrate 50, the hardness of grating mold 80 is higher, therefore, described in step S150 by grating mould
Having 80 specific embodiments peeled off from the first surface 41 of birefringent layers 40 is：" sandwich " structure together will be fitted in
One substrate 50, both alignment layers 60 and birefringent layers 40 from strip down grating mold 80 formed as shown in (VII) figure in Fig. 5
Structure, wherein, peel off the first surface that interface is that birefringent layers 40 and the interface of fitting of grating mold 80 are birefringent layers 40
41.It is understood that the grating mold 80 stripping down can reuse.
Peel off grating mold after 80s, form protective layer 20 at the first surface 41 of birefringent layers 40.In the present embodiment, protect
I.e. relative with the described first surface surface of the second surface of sheath 20 has second micro- knot corresponding with above-mentioned first micro structure
Structure, i.e. opposite with the first surface 41 of birefringent layers 40 surface of the first surface of protective layer 20 is parallel to first substrate 50.Aobvious
So, the second micro structure that the second surface of protective layer 20 is formed shape (as each repetitive width, highly, curvature half
The parameters such as footpath) determined by the shape of the first micro structure on birefringent layers 40.
Protective layer 20 can be by having high permeability and the preferable resin material of mobility such as acrylate, polyurethane etc.
Make.In the refractive index of protective layer 20 and the above-mentioned ordinary refraction index of birefringent layers 40 and extraordinary ray refractive index any one
Between difference absolute value be less than preset value.This preset value can according to user need arrange, for example, it is possible to be set to
0.03.Preferably, the refractive index of protective layer 20 is equal with ordinary refraction index, or, the refractive index of protective layer 20 and extraordinary
Optical index is equal.
Two kinds of protective layer 20 generation types that the present embodiment provides, will enter to the generation type of both protective layers 20 below
Row specifically describes.(VIII) figure in (VIII) figure in Fig. 5, (Ⅸ) figure and Fig. 6, (Ⅸ) figure respectively illustrate two kinds of protective layers 20
Generation type.It should be noted that Fig. 5 with Fig. 6 is respectively two kinds of different birefringent lens film manufacturing process flow diagrams, it is not
It is the formation process of protective layer 20 with part that is to say, that (I) figure in Fig. 5 with Fig. 6 is all consistent to (VII) figure, (Ⅹ).
In a kind of embodiment of the embodiment of the present invention, form protective layer 20 in the first surface 41 of birefringent layers 40
Method includes the first application step and the first curing schedule.First application step：It is coated with the first surface 41 of birefringent layers 40
The protective layer material of liquid forms coating layer；First curing schedule：Described coating layer is carried out solidifying to form protective layer 20.
In above-mentioned first application step, the coating method of protective layer material can be scraper for coating or spin coating etc..Preferably
, the minimum coating thickness of protective layer material is the first surface 41 of birefringent layers 40 to be filled into even curface, such as Fig. 5
In (VIII) figure shown in.The first curing schedule is entered, as shown in (Ⅸ) figure in Fig. 5, using UV after the completion of protective layer 20 coating
Light carries out irradiation or heating to coating layer so that coating layer solidifies, forms protective layer 20.In order to be able to effectively protect birefringence
Layer 40 is not scratched, and the protective layer 20 obtaining after solidification has preferable hardness.Preferably, the hardness of protective layer 20 is not less than
2H.After the completion of first curing schedule, you can to obtain birefringent lens film 100, as shown in (Ⅹ) figure in Fig. 5.
In the another embodiment of the embodiment of the present invention, form protective layer 20 in the first surface 41 of birefringent layers 40
Method include：Second application step, laminating step and the second curing schedule.
Second application step：Form coating layer in the protective layer material of second substrate 90 surface coating liquid state；
Wherein, second substrate 90 is preferably the common glass substrates of flexible glass, PET film or thinner thickness.Specifically
Coating process and protective layer material be referred to the corresponding description of the first above-mentioned application step, here is omitted.
Laminating step：The first surface 41 of described birefringent layers 40 is fitted with described coating layer；
After second application step completes, the mode preferably using cylinder rolling is by the first base shown in (VII) figure in Fig. 6
" sandwich " structure of plate 50, both alignment layers 60 and birefringent layers 40 is fitted in the surface of the coating layer formed on second substrate 90.
Specifically, as shown in (VIII) figure in Fig. 6, by the first surface 41 of the birefringent layers 40 in above-mentioned " sandwich " structure and coating layer
Fitted.
As needed, the minimum thickness benchmark of coating layer is that the first surface 41 ensureing birefringent layers 40 is fitted with coating layer
Afterwards, coating layer be enough to for the first surface with the first micro structure of birefringent layers 40 to be filled to even curface.Need explanation
, when second substrate 90 is flexible base board, the mode preferably by volume to volume is the mode of roller pair roller to two-fold
The first surface 41 penetrating layer 40 is fitted with coating layer；When second substrate 90 is hard substrate, as (VIII) figure institute in Fig. 6
Show, preferably using roller 30 and laminating platform (not shown), the first surface 41 of birefringent layers 40 is carried out with coating layer
Laminating.
Second curing schedule：Described coating layer is carried out solidify to form described protective layer 20.
After the completion of laminating, enter the second curing schedule.In the present embodiment, carry out irradiation using UV light coating layer or add
Heat, so that coating layer solidify to form protective layer 20, preferably carries out illumination from second substrate 90 side during UV solidification, in such as Fig. 6
(Ⅸ) shown in figure.
Now, according to use environment, can select whether second substrate 90 is peeled off.When second substrate 90 needs to carry out
During stripping, after above-mentioned second curing schedule, also include strip step, will described second substrate 90 from described protective layer 20
The sur-face peeling opposite with described first surface, forms birefringent lens film 100, as shown in (Ⅹ) figure in Fig. 6.Peel off the second base
Plate is after 90s, the protective layer 20 of this birefringent lens film 100 outwardly, birefringent layers 40 be located at protective layer 20 and first substrate 50 it
Between, because protective layer 20 has higher hardness, birefringent layers 40 can be avoided to be scratched.Additionally, the thickness in second substrate 90
In the case of relatively thin, second substrate 90 can not be peeled off, and now second substrate 90 can be used as birefringent lens film 100
A part is brought final products into and birefringent lens film 100 will not be produced with impact on optical effect.
In sum, bad based on occur in existing birefringent lens film manufacturing method, in above-mentioned steps S130, because of light
The difference of material expand coefficient between grid mould 80 and birefringent layers 40, the interface of grating mold 80 and birefringent layers 40 during baking
Place is likely to occur a small amount of bubbles of vacuum.Further birefringent layers 40 are solidified and peeled off with grating mold after 80s, be formed at
Bubbles of vacuum on both interfaces translates into the first surface 41 that hole is exposed to birefringent layers 40.By in birefringent layers
40 first surface 41 forms protective layer 20, can effectively fill the hole that the first surface 41 of birefringent layers 40 exists, real
The reparation of existing above-mentioned hole, improves the production yield of birefringent lens film 100.Additionally, the birefringence being provided by the present embodiment
In the birefringent lens film 100 that lens film manufacturing method manufactures, both alignment layers 60 that birefringent layers 40 are located on first substrate 50 with
Between protective layer 20.Because compared to birefringent layers 40, first substrate 50 and protective layer 20 are respectively provided with higher hardness, effectively
Avoid birefringent layers 40 and directly expose the birefringent layers 40 leading to and the bad problem such as be easily scratched.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of birefringent lens film it is characterised in that include be cascading first substrate, both alignment layers, birefringent layers
And protective layer, the surface relative with described protective layer of described birefringent layers have the first micro structure, described protective layer with institute
State the relative surface of birefringent layers and there is second micro structure corresponding with described first micro structure, described birefringent layers have ordinary
In optical index and extraordinary ray refractive index, described ordinary refraction index and described extraordinary ray refractive index, any one is with described guarantor
The absolute value of the difference between the refractive index of sheath is less than preset value.
2. birefringent lens film according to claim 1 is it is characterised in that described ordinary refraction index or described extraordinary
Optical index is equal with the refractive index of described protective layer.
3. birefringent lens film according to claim 1 is it is characterised in that described first micro structure includes multiple repetition lists
Unit, the plurality of repetitives are in array distribution.
4. birefringent lens film according to claim 1 it is characterised in that described protective layer with described birefringent layers phase
The surface of the back of the body is parallel to described first substrate.
5. a kind of birefringent lens film manufacturing method is it is characterised in that methods described includes：
Alignment layer surface on the first substrate is coated with the liquid crystal material of liquid, to form birefringent layers；
Described birefringent layers are fitted with grating mold, wherein, the fitting with described birefringent layers of described grating mold
Surface has default micro structure；
Described first substrate after described grating mold of fitting is placed so that described liquid crystal material is in gravity according to preset rules
Press close to described both alignment layers under effect and carry out orientation；
Described birefringent layers are solidified and is formed with the first surface fitted with described grating mold in described birefringent layers
The first micro structure corresponding to described default micro structure；
Described grating mold is peeled off from the first surface of described birefringent layers, and forms protective layer in described first surface, with
Form described birefringent lens film.
6. method according to claim 5 is it is characterised in that the surface relative with described first surface of described protective layer
There is second micro structure corresponding with described first micro structure, the surface opposite with described first surface of described protective layer is parallel
In described first substrate.
7. the method according to claim 5 or 6 it is characterised in that described described first surface formed protective layer step
Suddenly, including：
The protective layer material being coated with liquid in described first surface forms coating layer；
Described coating layer is carried out solidifying to form described protective layer.
8. the method according to claim 5 or 6 it is characterised in that described described first surface formed protective layer step
Suddenly, including：
Form coating layer in the protective layer material of second substrate surface coating liquid state；
The first surface of described birefringent layers is fitted with described coating layer；
Described coating layer is carried out solidifying to form described protective layer.
9. method according to claim 8 is it is characterised in that described carry out solidifying to form described protection to described coating layer
After the step of layer, also include：
By described second substrate from the described protective layer sur-face peeling opposite with described first surface.
10. method according to claim 5 it is characterised in that described by fit described grating mold after described first
Substrate is placed so that described liquid crystal material presses close to the step that described both alignment layers carry out orientation under gravity according to preset rules,
Including：
Described first substrate after described grating mold of fitting is toasted, wherein, described first substrate is located at described grating
The lower section of mould, described liquid crystal material press close to described both alignment layers under gravity so that liquid crystal molecule described both alignment layers work
With under according to preset direction arrangement.
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Application publication date: 20170301 |