CN102401925B - Patterned phase retardation membrane and manufacturing method thereof - Google Patents
Patterned phase retardation membrane and manufacturing method thereof Download PDFInfo
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- CN102401925B CN102401925B CN2011103941268A CN201110394126A CN102401925B CN 102401925 B CN102401925 B CN 102401925B CN 2011103941268 A CN2011103941268 A CN 2011103941268A CN 201110394126 A CN201110394126 A CN 201110394126A CN 102401925 B CN102401925 B CN 102401925B
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Abstract
The invention discloses a patterned phase retardation membrane and a manufacturing method thereof; the patterned phase retardation membrane comprises a substrate, a phase retardation layer and a flattening layer; the phase retardation layer is located on the substrate and comprises a plurality of first areas with liquid crystal materials and a plurality of second areas with curable resin; the first areas and the second areas are of grid-like strip-type structures and staggered with each other in parallel, and the top surfaces of the second areas are provided with at least one inclined plane; the flattening layer is used for flattening the phase retardation layer; the first areas provide a first phase retardation, the second areas provide a second phase retardation, and the difference between the first phase retardation and the second phase retardation is 180 DEG. The patterned phase retardation membrane disclosed by the invention is a patterned phase retardation membrane manufactured by using a novel manufacturing method.
Description
Technical field
The present invention is about a kind of patterned phase retardation membrane and manufacture method thereof, particularly about a kind of method for stamping of making patterned phase retardation membrane.
Background technology
Patterned phase retardation membrane is applied in the liquid crystal display, and the beholder can watch the 3D stereopsis via wearing polaroid glasses, and this is many known technology, and the method for existing multiple manufacturing patterned phase retardation membrane is published.
In correlative technology field, existed some to make the method for patterned phase retardation membrane, for example United States Patent (USP) the 6th, 624, disclose a kind of method of fabricating patterned phase retardation film No. 863, and United States Patent (USP) the 6th, disclose a kind of microstructure phase retardation film that uses the monolithic phase phase shift films to make for 498, No. 679.
Therefore, the invention provides the method for stamping of the manufacturing patterned phase retardation membrane of a novelty.
Summary of the invention
The present invention is relevant for a kind of novel process for preparing of patterned phase retardation membrane and the patterned phase retardation membrane of making thereof, particularly about a kind of method for stamping of making patterned phase retardation membrane.
The purpose one of according to the present invention, the present invention proposes a kind of patterned phase retardation membrane that possesses microstructure, and it comprises base material; Phase delay layer, it is positioned on this base material and comprises a plurality of first area and a plurality of second areas with curable resin with liquid crystal material, wherein this first area and this second area are palisade zone shape structure and parallel to each other staggered, and the top surface of second area has at least one inclined-plane; And planarization layer, it is in order to this phase delay layer of planarization; Wherein this first area provides the first phase delay, and this second area provides the second phase delay, and the difference of this first phase delay and this second phase delay is 180 °.
As optional technical scheme, the thickness of this first area is in 1 to 4 micrometer range.
As optional technical scheme, this first area more comprises both alignment layers, the liquid crystal material orientation in this both alignment layers and this first area.
As optional technical scheme, this base material is selected from the group that poly terephthalic acid diethylester, polycarbonate, Triafol T, polymethylmethacrylate and cyclic olefin polymer form.
When the present invention had at least one inclined-plane in order to coating of liquid crystalline at the top surface of second area, liquid crystal can not remain in the top of second area and cause crosstalking of phase delay between the first phase delay area and second area.In one of the present invention embodiment, at least one inclined-plane of the top surface of this second area and the angle of surface level are between 15 degree at 5 degree.
As optional technical scheme, the top surface of this second area combines to two inclined-planes between 15 degree scopes by being respectively 5 degree with horizontal plane angle.
As optional technical scheme, this planarization layer is the pressure-sensing glue of acrylic resin.Use pressure-sensing glue can be beneficial to simultaneously patterned phase retardation membrane of the present invention and release film or other blooming as planarization layer and fit to simplify processing procedure.
As optional technical scheme, the phase delay of this base material and this planarization layer is 0 °.
As optional technical scheme, the reflection coefficient of this planarization layer is identical with this curable resin.
As optional technical scheme, this curable resin is selected from the group that acryl resin, silicones and polyamine formic ether form.
As optional technical scheme, comprise that more at least one film material that is selected from release film, hard conating, low-reflection film, anti-reflective film and anti-dazzle film attaches on this patterned phase retardation membrane.
According to another object of the present invention, the present invention proposes a kind of manufacture method of patterned phase retardation membrane.The inventive method comprises provides base material; The coating curable resin is on this base material; Impress this curable resin to form pattern structure with predetermined pattern, it comprises a plurality of first areas and a plurality of second area, wherein this first area is the palisade groove with respect to this second area, and this first area is parallel with this second area staggered, and the top surface of second area has at least one inclined-plane.Then, solidify this pattern structure and form both alignment layers in bottom, this first area.The coating of liquid crystalline material on this pattern structure, this both alignment layers orientation in this liquid crystal material and the first area and form a plurality of the first phase delay area and jointly form phase delay layer with this second area; And with this phase delay layer of planarization layer planarization.In this phase delay layer, this first phase delay area provides the first phase delay, and this second area provides the second phase delay, and the difference of this first phase delay and this second phase delay is 180 °
As optional technical scheme, this both alignment layers forms via the method that is selected from scratches orientation, the orientation of brushing formula, light orientation, silicon dioxide and is steaming the group that method and ion beam orientation method form.
As optional technical scheme, this liquid crystal material and this both alignment layers orientation are carried out in 45～100 ℃ of temperature ranges.
As optional technical scheme, this liquid crystal material is via ultraviolet curing or heat curing.
The patterned phase retardation membrane that provides with the preceding method preparation is provided.
More embodiment according to the present invention, this patterned phase retardation membrane can attach on the display panel so that the audience to be provided stereopsis.
Compared with prior art, patterned phase retardation membrane of the present invention is for adopting the novel produced patterned phase retardation membrane of manufacture method.
For foregoing of the present invention can be become apparent, embodiment cited below particularly, and cooperate appended graphicly, be described in detail below in order to limit prerequisite of the present invention with diagram is non-with above-described embodiment:
Description of drawings
Fig. 1 illustrates the schematic perspective view of the patterned phase retardation membrane of one embodiment of the invention.
Fig. 2 is illustrated in the three-dimensional exploded view of patterned phase retardation membrane shown in Figure 1.
Fig. 3 A-3F is the synoptic diagram of a preferred embodiment of manufacture method of the present invention.
Fig. 4 illustrates the synoptic diagram according to the patterned phase retardation membrane of one embodiment of the invention.
Fig. 5 illustrates the manufacturing patterned phase retardation membrane processing procedure synoptic diagram according to one embodiment of the invention.
Embodiment
The appended diagram of the present invention is not to limit content of the present invention in order to describe in detail.
Fig. 1 illustrates the schematic perspective view according to the patterned phase retardation membrane 100 of a preferred embodiment manufacturing of the inventive method.Fig. 2 is the three-dimensional exploded view of the patterned phase retardation membrane 100 of Fig. 1.This patterned phase retardation membrane 100 comprises base material 110, phase delay layer 135 and planarization layer 150.Phase delay layer 135 comprises a plurality of the first phase delay area 140 and a plurality of the second phase delay area 122 with curable resin with liquid crystal material, wherein the first phase delay area 140 and the second phase delay area 122 are palisade zone shape structure and parallel to each other staggered, and the top surface in the second phase delay area territory is comprised of two inclined-planes.The first phase delay area 140 provides the first phase delay, and the second phase delay area 122 provides the second phase delay, and the difference of the first phase delay and the second phase delay is 180 °.
Fig. 3 A-3F is the synoptic diagram of a preferred embodiment of manufacture method of the present invention.
As shown in Figure 3A, provide base material 210, its phase delay is less than 90 °, and preferably, the phase delay essence of base material 210 is 0 °.The base material 210 that the present invention uses can be poly terephthalic acid diethylester (polyethylene terephthalate for example, PET), polycarbonate (polycarbonate, PC), Triafol T (triacetyl cellulose, TAC), polymethylmethacrylate (polymethyl methacrylate, PMMA) or cyclic olefin polymer (cyclo-olefin polymer, COP).Base material 210 thickness of the present invention are in 30～300 microns (μ m) scopes.
Then, shown in Fig. 3 B, curable resin 220 is coated on the base material 210.The coating method of curable resin 220 is to have in the affiliated technical field to know that usually the knowledgeable knows, and for example is slot coated (die coating) or the brush coating of intaglio process (gravure coating).Curable resin 220 can be ultraviolet curable resin (UV curable resin) or heat reactive resin (thermo-curable resin), for example is acryl resin (acrylic resin), silicones (silicone) or polyamine formic ether (polyurethane).
Behind the coating curable resin, impress this curable resin 220 to form pattern structure 230 on base material 210 with predetermined pattern.This pattern structure 230 comprises a plurality of first areas 231 and a plurality of second area 232.At least one inclined-plane 232c of the top surface tool of this second area (shown in Fig. 3 C), or form (shown in Fig. 3 D) by two inclined-plane 232a, 232b, the angle of this inclined-plane and surface level between 15 degree scopes, is preferably 10 degree at 5 degree.This pattern structure 230 can be implemented by the plane imprinting apparatus with predetermined pattern corresponding with pattern structure of the present invention or roller impression.
In an embodiment of the manufacture method of patterned phase retardation membrane of the present invention, as shown in Figure 5, impression can be by for example being that a mould roller is implemented.One group of embossment structure 413a of the surface configuration of mould roller 413 and one group of groove structure 413b, wherein this groove structure 413b has corresponding ramp structure, and this group embossment structure 413a extends along the rotation direction of mould roller 413.In another group embodiment, the bearing of trend of embossment structure 413a is vertical (not illustrating in figure) with the rotation direction of mould roller 413.
Now please refer to Fig. 3 A to 3F, the curable resin 220 on base material 210 forms a palisade pattern structure through mould roller 413 impressions.Pattern structure 230 comprises a plurality of first areas 231 and a plurality of second area 232, and wherein the spacing of the degree of depth of the palisade groove of first area 231 and width and adjacent two palisade grooves is decided with viewing distance according to the some carpenters square cun (pitch size) of the liquid crystal display of phase differential phase shift films wish of the present invention combination.In the present embodiment, the degree of depth of the palisade groove of this first area in 0.1～9.9 micron (μ m) scope and width in 10～900 microns (μ m) scopes, and the spacing of adjacent two palisade grooves is in 10～900 microns (μ m) scopes.
Solidify the pattern structure 230 that this forms through impression.Curing mode can be via for example being that ultraviolet curing or heat curing are finished.Then, pattern structure 230 solidify finish after, on the surface of the palisade groove of this first area, form both alignment layers (be not shown in graphic in).The generation type of this both alignment layers is to have the method for knowing that usually the knowledgeable knows in the affiliated technical field, for example is that method (SiO2 evaporation) or ion beam orientation method (ion beam alignment) are being steamed in scratches orientation (micro-scratch alignment treatment), brushing formula orientation (rubbing treatment), light orientation (photo-alignment), silicon dioxide.
Then, liquid crystal material 240 is coated on the pattern structure 230.The coating method of liquid crystal material is to have the processing procedure of knowing that usually the knowledgeable knows in the affiliated technical field.In an embodiment of the manufacture method of patterned phase retardation membrane of the present invention, the set-up mode of liquid crystal material for example is slot coated (die coating) or the brush coating of intaglio process (gravure coating).In an embodiment of the manufacture method of patterned phase retardation membrane of the present invention, liquid crystal material is the polymerizable liquid crystal material, it for example is BASF LC242 (polymerizable liquid crystal double methacrylate, BASF, German) or RMS10-021 (optical polymerism active liquid wafer solution, Merck photoelectricity Science and Technology Co., Ltd., Taiwan).Liquid crystal material can need to be mixed in first in the solvent in response to coating, and the solid content of liquid crystal solution ties up in 10%～50% scope.Preferably, the solid content essence about 0% of liquid crystal solution.The solvent that uses is to have in the affiliated technical field to know that usually the knowledgeable knows, and for example is 1-Methoxy-2-propyl acetate (propylene glycol monomethyl ether acetate, PGMEA).
In one embodiment of the invention, liquid crystal material is coated on the surface of pattern structure 230 with predetermined thickness according to its solid content.Because of the inclined-plane 232a at second area top, 232b is so so that liquid crystal material when removing solvent, for example uses type of heating to remove, can be placed in the first area fully along the inclined-plane downslide.This liquid crystal material solvent in the first area is when removing with type of heating, and heating-up temperature is in about 45 ℃ to 100 ℃ scopes, is preferably in about 50 ℃ to 70 ℃ scopes.This liquid crystal material can provide phase delay in removing the thickness that possesses behind the solvent, for example is 1/2 λ (wavelength unit).The liquid crystal material properties influence that is adopted because of phase delay, so different liquid crystal materials is wanted the phase place sample retardance that reaches required, then required thickness also can be different.The relevance that these liquid crystal material characteristics and phase differential postpone is ripe known in this skill personage.The liquid crystal material that uses in a preferred embodiment of the present invention is a kind of aggretion type liquid crystal material, photo-polymerization type liquid crystal diacrylate (BASF LC242 for example, available from BASF Aktiengesellschaft) and photo-polymerization type active liquid wafer solution (product are called RMS 10-021, available from Taiwan Merck Photoelectric Co., Ltd.).Behind the solvent removal, liquid crystal material is placed in the palisade groove of first area 231 to form phase delay layer.
In another embodiment of the manufacture method of patterned phase retardation membrane of the present invention, liquid crystal material can be solvent-free, coat on the pattern structure 230 and fill up first area 231, because of the inclined-plane at second area top, liquid crystal can slip into and be placed in the first area fully.In this embodiment, can be beneficial to via preheating method the coating of solvent-free liquid crystal material.
In the method that the present invention discloses, because the top of the second area that adopts has the specific pattern structure at least one inclined-plane, in the time of can making the liquid crystal coating, liquid crystal can not remain in the top of second area.
Then, the both alignment layers orientation of liquid crystal material 231 bottoms along the first area.In an embodiment of manufacture method of the present invention, be liquid crystal material when adopting RM10-021, the orientation temperature that this liquid crystal material adopts is in about 40 ℃ to 65 ℃ scopes, and is better in about 45 ℃ to 58 ℃ scopes.In a preferred embodiment of the manufacture method of patterned phase retardation membrane of the present invention, the orientation temperature is at about 55 ℃.
After LCD alignment is finished, liquid crystal layer is cured processes to solidify liquid crystal material in the first area 231 to form a plurality of the first phase delay area 241.Solidify processing can be via for example being that ultraviolet curing or heat curing are finished.In an embodiment of the manufacture method of patterned phase retardation membrane of the present invention, adopting RM10-021 is that liquid crystal material is 2.1 microns (μ m) with the thickness that forms the first phase delay area 241, the first phase delay area 241.Therefore, because the phase delay essence of its second area 232 is zero, the first phase delay area 241 is 180 ° with the phase-delay difference of second area 232.In the method that the present invention discloses, because the top of the second area that adopts has the specific pattern structure at least one inclined-plane, so liquid crystal when coating, liquid crystal can not remain in the top of second area, can avoid crosstalking of phase delay between the first phase delay area and the second phase delay area.
Then, shown in Figure 4, use pressure-sensing glue as planarization layer 350 with this phase delay layer of planarization.The pressure-sensing glue of using can not be disturbed the optical characteristics of phase delay layer.Spendable pressure-sensing glue comprises for example acrylic acid series pressure-sensing glue.Use pressure-sensing glue can be beneficial to simultaneously patterned phase retardation membrane of the present invention and release film or other blooming as planarization layer and fit to simplify processing procedure.
Patterned phase retardation membrane manufacture method of the present invention can batch process (batch production) or continuous process (continuous production) implementation.Fig. 5 illustrates the manufacturing patterned phase retardation membrane continuous process system schematic according to one embodiment of the invention, for example is volume to volume system (roll-to-roll system).System 400 is in order to make patterned phase retardation membrane of the present invention.Base material 410 unreels and transmits through apparatus for coating 412 with coating curable resin 420 thereon from the first roller 411.Then, impress processing with 413 pairs of curable resins 420 of aforesaid mould roller, the pattern structure 430 that possesses grating structure with formation, it comprises a plurality of first areas and a plurality of second area, wherein the first area is grid-like groove and parallel with second area staggered, and the top surface of second area has at least one inclined-plane.Pattern structure 430 then is cured processing via solidification equipment 414, and solidification equipment 414 is ultraviolet curing device or thermal-curable system.In an embodiment of the manufacture method of patterned phase retardation membrane of the present invention, after pattern structure 430 solidifies, in forming both alignment layers (in figure, not illustrating) on the cured pattern structure 440.Then, via on the liquid crystal coating apparatus 415 coating of liquid crystalline materials extremely cured pattern structure 440.
In an embodiment of the manufacture method of patterned phase retardation membrane of the present invention, form liquid crystal material solution (optical polymerism active liquid wafer solution) after liquid crystal material and the solvent and be applied to subsequently on the cured pattern structure 440, then via heat treatment apparatus 416 with the solvent removal in the liquid crystal material solution and with seasonal liquid crystal material orientation.Heating-up temperature is in about 45 ℃ to 100 ℃ scopes, is preferably in about 50 ℃ to 70 ℃ scopes.In another embodiment of the present invention, liquid crystal material can be solvent-free and directly coat on the cured pattern structure 440 via liquid crystal coating apparatus 415.And because the top surface of second area has at least one inclined-plane, liquid crystal material slips in the first area.
In an embodiment of manufacture method of the present invention, the temperature that orientation is processed is in about 45 ℃ to 100 ℃ scopes.In a preferred embodiment, the orientation temperature is in about 50 ℃ to 70 ℃ scopes.After orientation is finished, solidify liquid crystal material with liquid crystal solidification equipment 417.Solidification equipment 417 is ultraviolet curing device or thermal-curable system.After finishing curing, as shown in Figure 5, then, be coated with pressure-sensing glue to the liquid crystal layer that has solidified via pressure-sensing glue apparatus for coating 418.In one embodiment of this invention, another film material 421 is unreeled and is conformed on the pressure sensing adhesive layer via laminater 422 by the second roller 419 such as release film, diaphragm or optical film material etc.Patterned phase retardation membrane is followed rolling to roller 411a.
As in preamble, mentioning, as the film material 421 that uses is blooming, it can be for example hard conating (hard-coating film), low-reflection film (low reflective film), anti-reflective film (anti-reflective film) or anti-dazzle film (anti-glaring film), so that extra required optical characteristics further to be provided.
In sum, although the present invention discloses as above with embodiment, so it is not to limit the present invention.The persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention claim person of defining after looking is as the criterion.
Claims (15)
1. patterned phase retardation membrane that possesses microstructure is characterized in that comprising:
Base material;
Phase delay layer, it is positioned on this base material and comprises a plurality of first area and a plurality of second areas with curable resin with liquid crystal material, wherein this first area and this second area are palisade zone shape structure and parallel to each other staggered, and the top surface of this second area has at least one inclined-plane; And
Planarization layer, it is in order to this phase delay layer of planarization;
Wherein this first area provides the first phase delay, and this second area provides the second phase delay, and the difference of this first phase delay and this second phase delay is 180 °.
2. patterned phase retardation membrane as claimed in claim 1 is characterized in that the thickness of this first area is in 1 to 4 micrometer range.
3. patterned phase retardation membrane as claimed in claim 1 is characterized in that this first area more comprises both alignment layers, the liquid crystal material orientation in this both alignment layers and this first area.
4. patterned phase retardation membrane as claimed in claim 1 is characterized in that this base material is selected from the group that poly terephthalic acid diethylester, polycarbonate, Triafol T, polymethylmethacrylate and cyclic olefin polymer form.
5. patterned phase retardation membrane as claimed in claim 1 is characterized in that at least one inclined-plane of top surface of this second area and the angle of surface level are between 15 degree at 5 degree.
6. patterned phase retardation membrane as claimed in claim 1 is characterized in that the top surface of this second area combines to two inclined-planes between 15 degree scopes by being respectively 5 degree with horizontal plane angle.
7. patterned phase retardation membrane as claimed in claim 1 is characterized in that this planarization layer is the pressure-sensing glue of acrylic resin.
8. patterned phase retardation membrane as claimed in claim 1, the phase delay that it is characterized in that this base material and this planarization layer is 0 °.
9. patterned phase retardation membrane as claimed in claim 1 is characterized in that the reflection coefficient of this planarization layer is identical with this curable resin.
10. patterned phase retardation membrane as claimed in claim 1 is characterized in that this curable resin is selected from the group that acryl resin, silicones and polyamine formic ether form.
11. patterned phase retardation membrane as claimed in claim 1 is characterized in that more comprising that at least one film material that is selected from release film, hard conating, low-reflection film, anti-reflective film and anti-dazzle film attaches on this patterned phase retardation membrane.
12. the manufacture method of a patterned phase retardation membrane is characterized in that comprising:
Base material is provided;
The coating curable resin is on this base material;
Impress this curable resin to form pattern structure with predetermined pattern, this pattern structure comprises a plurality of first areas and a plurality of second area, wherein this pattern structure possesses palisade zone shape structure and this first area is the palisade groove with respect to this second area, and this first area is parallel with this second area staggered, and the top surface of second area has at least one inclined-plane;
Solidify this pattern structure;
Form both alignment layers in this bottom, first area;
Arrange on liquid crystal material this both alignment layers in this first area jointly to form phase delay layer with this second area;
Along this both alignment layers orientation and solidify liquid crystal material in this first area to form a plurality of the first phase delay area; And
With this phase delay layer of planarization layer planarization;
Wherein in this phase delay layer, this first area provides the first phase delay, and this zone, the second territory provides the second phase delay, and the difference of this first phase delay and this second phase delay is 180 °.
13. manufacture method as claimed in claim 12 is characterized in that this both alignment layers forms via the method that is selected from scratches orientation, the orientation of brushing formula, light orientation, silicon dioxide and is steaming the group that method and ion beam orientation method form.
14. manufacture method as claimed in claim 12 is characterized in that this liquid crystal material and this both alignment layers orientation carry out in 45～100 ℃ of temperature ranges.
15. manufacture method as claimed in claim 12 is characterized in that this liquid crystal material is via ultraviolet curing or heat curing.
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| CN102636834A (en) * | 2012-04-26 | 2012-08-15 | 深圳市华星光电技术有限公司 | 3D (three dimensional) display device and phase delay piece thereof |
| CN106199812B (en) * | 2016-08-30 | 2019-08-06 | 苏州柔彩新材料科技有限公司 | A kind of thinning functional polarizing piece and its preparation method and application |
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| JP2007147931A (en) * | 2005-11-28 | 2007-06-14 | Sony Corp | Retardation plate, liquid crystal display element, and liquid crystal projector system |
| CN101185013A (en) * | 2005-05-27 | 2008-05-21 | 日本瑞翁株式会社 | Grid polarizing film, method for manufacturing grid polarizing film, optical laminate, method for manufacturing optical laminate, and liquid crystal display apparatus |
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| WO2011049326A2 (en) * | 2009-10-19 | 2011-04-28 | Lg Chem, Ltd. | Patterned retardation film and method for manufacturing the same |
| US8520174B2 (en) * | 2010-05-27 | 2013-08-27 | Benq Materials Corp. | Patterned retarder film and method for manufacturing |
| US8520175B2 (en) * | 2010-05-27 | 2013-08-27 | Benq Materials Corp. | Patterned retarder film and method for manufacturing the same |
| CN102243331A (en) * | 2011-06-30 | 2011-11-16 | 明基材料有限公司 | Phase difference film |
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| CN101185013A (en) * | 2005-05-27 | 2008-05-21 | 日本瑞翁株式会社 | Grid polarizing film, method for manufacturing grid polarizing film, optical laminate, method for manufacturing optical laminate, and liquid crystal display apparatus |
| JP2007147931A (en) * | 2005-11-28 | 2007-06-14 | Sony Corp | Retardation plate, liquid crystal display element, and liquid crystal projector system |
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