WO2016208535A1 - 偏光子 - Google Patents
偏光子 Download PDFInfo
- Publication number
- WO2016208535A1 WO2016208535A1 PCT/JP2016/068248 JP2016068248W WO2016208535A1 WO 2016208535 A1 WO2016208535 A1 WO 2016208535A1 JP 2016068248 W JP2016068248 W JP 2016068248W WO 2016208535 A1 WO2016208535 A1 WO 2016208535A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polarizer
- polarizing
- resin
- stretching
- protective film
- Prior art date
Links
- 229920005989 resin Polymers 0.000 claims abstract description 206
- 239000011347 resin Substances 0.000 claims abstract description 206
- 230000001681 protective effect Effects 0.000 claims description 88
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 80
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 80
- 229910052740 iodine Inorganic materials 0.000 claims description 48
- 239000011630 iodine Substances 0.000 claims description 48
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 42
- 239000000126 substance Substances 0.000 claims description 38
- 150000001340 alkali metals Chemical class 0.000 claims description 28
- 229910052783 alkali metal Inorganic materials 0.000 claims description 27
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 25
- 238000002834 transmittance Methods 0.000 claims description 25
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 24
- 239000000463 material Substances 0.000 abstract description 35
- 230000006870 function Effects 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 68
- 238000000034 method Methods 0.000 description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 60
- 238000011282 treatment Methods 0.000 description 55
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 50
- 239000004327 boric acid Substances 0.000 description 50
- 239000003637 basic solution Substances 0.000 description 44
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 36
- 239000007788 liquid Substances 0.000 description 35
- 239000007864 aqueous solution Substances 0.000 description 27
- 239000002585 base Substances 0.000 description 27
- -1 polypropylene Polymers 0.000 description 27
- 239000000543 intermediate Substances 0.000 description 26
- 239000000243 solution Substances 0.000 description 24
- 239000000758 substrate Substances 0.000 description 24
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 18
- 238000010521 absorption reaction Methods 0.000 description 18
- 230000010287 polarization Effects 0.000 description 18
- 238000007654 immersion Methods 0.000 description 16
- 238000000576 coating method Methods 0.000 description 14
- 238000004043 dyeing Methods 0.000 description 14
- 230000003287 optical effect Effects 0.000 description 14
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 13
- 150000007513 acids Chemical class 0.000 description 13
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 13
- 230000008569 process Effects 0.000 description 13
- 239000002904 solvent Substances 0.000 description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 239000003929 acidic solution Substances 0.000 description 12
- 238000004132 cross linking Methods 0.000 description 12
- 238000002156 mixing Methods 0.000 description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 11
- 238000001035 drying Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 11
- 230000009477 glass transition Effects 0.000 description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 238000004140 cleaning Methods 0.000 description 9
- 229920000139 polyethylene terephthalate Polymers 0.000 description 9
- 239000005020 polyethylene terephthalate Substances 0.000 description 9
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 8
- 230000008901 benefit Effects 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 8
- 150000002148 esters Chemical class 0.000 description 8
- 229910052708 sodium Inorganic materials 0.000 description 8
- 239000011734 sodium Substances 0.000 description 8
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 7
- 238000004042 decolorization Methods 0.000 description 7
- 239000004973 liquid crystal related substance Substances 0.000 description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000012790 adhesive layer Substances 0.000 description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- 238000007127 saponification reaction Methods 0.000 description 6
- 239000012192 staining solution Substances 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 5
- 150000007514 bases Chemical class 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 5
- 238000004080 punching Methods 0.000 description 5
- 239000002335 surface treatment layer Substances 0.000 description 5
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 4
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 description 4
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 4
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 235000011054 acetic acid Nutrition 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 3
- 238000011088 calibration curve Methods 0.000 description 3
- 150000001925 cycloalkenes Chemical class 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 150000007522 mineralic acids Chemical class 0.000 description 3
- 239000012046 mixed solvent Substances 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- JFNLZVQOOSMTJK-KNVOCYPGSA-N norbornene Chemical compound C1[C@@H]2CC[C@H]1C=C2 JFNLZVQOOSMTJK-KNVOCYPGSA-N 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
- 229920006122 polyamide resin Polymers 0.000 description 3
- 229920005668 polycarbonate resin Polymers 0.000 description 3
- 239000004431 polycarbonate resin Substances 0.000 description 3
- 229920005672 polyolefin resin Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 description 3
- 238000010186 staining Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 2
- 229920008790 Amorphous Polyethylene terephthalate Polymers 0.000 description 2
- 239000005711 Benzoic acid Substances 0.000 description 2
- 229920002284 Cellulose triacetate Polymers 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 235000010233 benzoic acid Nutrition 0.000 description 2
- 238000001311 chemical methods and process Methods 0.000 description 2
- 229920006026 co-polymeric resin Polymers 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000003851 corona treatment Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 210000002858 crystal cell Anatomy 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 235000019253 formic acid Nutrition 0.000 description 2
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N glyoxal Chemical compound O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 description 2
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 2
- 150000004679 hydroxides Chemical class 0.000 description 2
- 239000002346 layers by function Substances 0.000 description 2
- HSZCZNFXUDYRKD-UHFFFAOYSA-M lithium iodide Chemical compound [Li+].[I-] HSZCZNFXUDYRKD-UHFFFAOYSA-M 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- 235000006408 oxalic acid Nutrition 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004445 quantitative analysis Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910052703 rhodium Inorganic materials 0.000 description 2
- 239000010948 rhodium Substances 0.000 description 2
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 150000005846 sugar alcohols Polymers 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 238000004876 x-ray fluorescence Methods 0.000 description 2
- UAYWVJHJZHQCIE-UHFFFAOYSA-L zinc iodide Chemical compound I[Zn]I UAYWVJHJZHQCIE-UHFFFAOYSA-L 0.000 description 2
- GCQUOBKUEHYBMC-UHFFFAOYSA-N 3-(diethylamino)-7,8-dihydro-6h-cyclopenta[2,3]thieno[2,4-b][1,3]oxazin-1-one Chemical compound O=C1OC(N(CC)CC)=NC2=C1C(CCC1)=C1S2 GCQUOBKUEHYBMC-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- UNMYWSMUMWPJLR-UHFFFAOYSA-L Calcium iodide Chemical compound [Ca+2].[I-].[I-] UNMYWSMUMWPJLR-UHFFFAOYSA-L 0.000 description 1
- 241000694440 Colpidium aqueous Species 0.000 description 1
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 description 1
- DKNPRRRKHAEUMW-UHFFFAOYSA-N Iodine aqueous Chemical compound [K+].I[I-]I DKNPRRRKHAEUMW-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- ORLQHILJRHBSAY-UHFFFAOYSA-N [1-(hydroxymethyl)cyclohexyl]methanol Chemical compound OCC1(CO)CCCCC1 ORLQHILJRHBSAY-UHFFFAOYSA-N 0.000 description 1
- 125000002339 acetoacetyl group Chemical group O=C([*])C([H])([H])C(=O)C([H])([H])[H] 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- CECABOMBVQNBEC-UHFFFAOYSA-K aluminium iodide Chemical compound I[Al](I)I CECABOMBVQNBEC-UHFFFAOYSA-K 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 238000007611 bar coating method Methods 0.000 description 1
- SGUXGJPBTNFBAD-UHFFFAOYSA-L barium iodide Chemical compound [I-].[I-].[Ba+2] SGUXGJPBTNFBAD-UHFFFAOYSA-L 0.000 description 1
- 229910001638 barium iodide Inorganic materials 0.000 description 1
- 229940075444 barium iodide Drugs 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 229910001640 calcium iodide Inorganic materials 0.000 description 1
- 229940046413 calcium iodide Drugs 0.000 description 1
- 239000012461 cellulose resin Substances 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- GBRBMTNGQBKBQE-UHFFFAOYSA-L copper;diiodide Chemical compound I[Cu]I GBRBMTNGQBKBQE-UHFFFAOYSA-L 0.000 description 1
- 238000007766 curtain coating Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229920005994 diacetyl cellulose Polymers 0.000 description 1
- 238000007607 die coating method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000007306 functionalization reaction Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 229940015043 glyoxal Drugs 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 238000000608 laser ablation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000009518 sodium iodide Nutrition 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- QPBYLOWPSRZOFX-UHFFFAOYSA-J tin(iv) iodide Chemical compound I[Sn](I)(I)I QPBYLOWPSRZOFX-UHFFFAOYSA-J 0.000 description 1
- NLLZTRMHNHVXJJ-UHFFFAOYSA-J titanium tetraiodide Chemical compound I[Ti](I)(I)I NLLZTRMHNHVXJJ-UHFFFAOYSA-J 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/12—Chemical modification
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/12—Chemical modification
- C08J7/14—Chemical modification with acids, their salts or anhydrides
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/02—Details
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/868—Arrangements for polarized light emission
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2329/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
Definitions
- the present invention relates to a polarizer.
- this invention relates to the polarizer which has a non-polarizing part.
- Some image display devices such as mobile phones and notebook personal computers (PCs) are equipped with internal electronic components such as cameras.
- Various studies have been made for the purpose of improving the camera performance and the like of such an image display device (for example, Patent Documents 1 to 7).
- Patent Documents 1 to 7 For example, Patent Documents 1 to 7
- smartphones and touch panel type information processing devices further improvements in camera performance and the like are desired.
- a polarizing plate partially having polarization performance.
- the present invention has been made in order to solve the above-described conventional problems, and the main object thereof is to have a non-polarizing portion capable of realizing multi-function and high-functionality of an electronic device such as an image display device.
- An object of the present invention is to provide a polarizer excellent in dimensional stability and appearance of a non-polarizing part.
- the polarizer of the present invention is composed of a resin film containing a dichroic substance and has a non-polarizing portion at a predetermined position.
- the non-polarizing part is a thin part thinner than other parts of the resin film.
- the said non-polarizing part has a recessed part where the surface of the one surface side of this resin film was dented, and the depth of this recessed part is 2 micrometers or less.
- the polarizer has a thickness of 10 ⁇ m or less.
- the non-polarizing part is a low-concentration part in which the content of the dichroic substance is lower than the other part of the resin film.
- dichroic substance content of the said non-polarizing part is 1.0 weight% or less.
- the dichroic substance content of the non-polarizing part is 1.0% by weight or less, and the depth of the concave part is 2 ⁇ m or less. In one embodiment, content of the alkali metal and / or alkaline-earth metal of the said non-polarization part is 3.6 weight% or less. In one embodiment, the transmittance of the non-polarizing part is 50% or more. In one embodiment, the transmittance of the non-polarizing part is 90% or more, and the depth of the concave part is 2 ⁇ m or less. In one embodiment, the resin film is a polyvinyl alcohol-based resin film containing iodine. According to another aspect of the present invention, a polarizing plate is provided.
- This polarizing plate has the above polarizer and a protective film disposed on at least one side of the polarizer.
- an image display device is provided.
- the image display device includes the polarizer or the polarizing plate, and the non-polarizing portion of the polarizer is disposed at a position corresponding to the camera portion.
- the non-polarizing part is formed by a predetermined chemical decoloring process (typically, a process with a basic solution and an accompanying chemical process), whereby the transmittance is high. It is possible to form a non-polarizing part that is suitably arranged at a position corresponding to the camera part and that is excellent in dimensional stability and appearance.
- the present inventors According to such a chemical decoloring process, the present inventors have inevitably caused a depression in the non-polarizing part, particularly when increasing the transmittance of the non-polarizing part. When it was too much, even if it filled the said dent with the adhesive agent etc. at the time of polarizing plate formation, it discovered that the said dent might be visually recognized. Furthermore, the present inventors have found that by controlling (substantially reducing) the depth of such a dent, it is possible to suppress the dent from being visually recognized. While maintaining the characteristics, we succeeded in ensuring the design. As described above, according to the present invention, a polarizer excellent in dimensional stability and appearance of the non-polarizing part can be realized.
- FIG. 1 is a schematic plan view of a polarizer according to one embodiment of the present invention. It is a schematic sectional drawing of the polarizer of FIG. It is a schematic perspective view of the polarizer by another embodiment of this invention. It is a schematic plan view explaining an example of the arrangement pattern of the non-polarization part in the elongate polarizer by embodiment of this invention. It is a schematic plan view explaining another example of the arrangement pattern of the non-polarization part in the elongate polarizer by embodiment of this invention. It is a schematic plan view explaining another example of the arrangement pattern of the non-polarization part in the elongate polarizer by embodiment of this invention. It is a schematic sectional drawing of the polarizing plate by one Embodiment of this invention.
- FIG. 8A is a diagram showing the evaluation results of the surface smoothness of Example 1
- FIG. 8B is a diagram showing the evaluation results of the surface smoothness of Example 2.
- A. Polarizer A-1. 1 is a schematic plan view of a polarizer according to one embodiment of the present invention
- FIG. 2 is a schematic cross-sectional view of the polarizer of FIG. 1 and 2 are different in scale and ratio.
- the polarizer 100 is made of a resin film 10 and has a non-polarizing portion 20 at a predetermined position.
- the resin film 10 contains a dichroic substance.
- the non-polarizing part 20 is a thin part thinner than other parts of the resin film.
- the non-polarizing portion 20 has a recess 22 in which the surface on one surface side of the resin film 10 is recessed. The depth of the recess 22 is 2 ⁇ m or less.
- the polarizer (excluding the non-polarized part) preferably exhibits absorption dichroism at any wavelength from 380 nm to 780 nm.
- the single transmittance (Ts) of the polarizer (excluding the non-polarized part) is preferably 39% or more, more preferably 39.5% or more, still more preferably 40% or more, and particularly preferably 40.5% or more. .
- the theoretical upper limit of the single transmittance is 50%, and the practical upper limit is 46%.
- the single transmittance (Ts) is a Y value measured by a JIS Z8701 two-degree field of view (C light source) and corrected for visibility, for example, using a microspectroscopic system (Lambda Vision, LVmicro). Can be measured.
- the degree of polarization of the polarizer (excluding the non-polarized part) is preferably 99.9% or more, more preferably 99.93% or more, and further preferably 99.95% or more.
- the resin film 10 any appropriate resin film that can be used as a polarizer can be adopted.
- the resin film 10 is typically a polyvinyl alcohol-based resin (hereinafter referred to as “PVA-based resin”) film.
- any appropriate resin can be used as the PVA resin for forming the PVA resin film.
- Examples thereof include polyvinyl alcohol and ethylene-vinyl alcohol copolymer.
- Polyvinyl alcohol is obtained by saponifying polyvinyl acetate.
- the ethylene-vinyl alcohol copolymer can be obtained by saponifying an ethylene-vinyl acetate copolymer.
- the degree of saponification of the PVA-based resin is usually 85 mol% to 100 mol%, preferably 95.0 mol% to 99.95 mol%, more preferably 99.0 mol% to 99.93 mol%. .
- the degree of saponification can be determined according to JIS K 6726-1994. By using a PVA-based resin having such a saponification degree, a polarizer having excellent durability can be obtained. If the degree of saponification is too high, there is a risk of gelation.
- the average degree of polymerization of the PVA resin can be appropriately selected according to the purpose.
- the average degree of polymerization is usually 1000 to 10,000, preferably 1200 to 4500, and more preferably 1500 to 4300.
- the average degree of polymerization can be determined according to JIS K 6726-1994.
- dichroic substance contained in the resin film examples include iodine and organic dyes. These may be used alone or in combination of two or more. Preferably, iodine is used.
- iodine is used.
- the iodine complex contained in the resin film (polarizer) is appropriately reduced, so that the non-polarizing part has suitable characteristics when used for a camera part, for example. It is because it can form.
- the thickness of the resin film is preferably 10 ⁇ m or less, more preferably 8 ⁇ m or less, still more preferably 6 ⁇ m or less, and particularly preferably 5 ⁇ m or less.
- the thickness is preferably 0.5 ⁇ m or more, more preferably 1 ⁇ m or more.
- a non-polarizing part can be formed favorably, so that thickness is thin. For example, when forming a non-polarization part by decoloring by a chemical process, the contact time of a decoloring liquid and a resin film (polarizer) can be shortened.
- the non-polarizing part can be formed in a shorter time. Furthermore, there is a case where the thickness of the portion where the decolorizing liquid (for example, the basic solution) is contacted becomes thinner than other portions and a step can be formed. By reducing the thickness of the resin film, such a step can be formed. Can be reduced. As a result, it is possible to suppress a problem that the concave portion is visually recognized. More specifically, as a result of extensive studies, the inventors have formed a concave portion having a depth of about 20% of the thickness of the resin film, for example, when desiring to increase the transmittance of the non-polarizing portion by decolorization. I found out.
- the present inventors have found that the absolute value of the depth of the recess, not the ratio of the depth of the recess to the thickness of the resin film, affects the appearance (typically, the visibility of the recess). Therefore, by reducing the thickness of the resin film, the absolute value of the depth of the recess can be reduced, and as a result, the influence on the appearance can be suppressed.
- Such an effect is an excellent effect obtained only when a technique for forming a non-polarizing portion (particularly, a non-polarizing portion having a high transmittance) by decolorization by chemical treatment is applied to a very thin polarizer.
- the non-polarizing portion 20 is a thin portion thinner than other portions.
- the non-polarizing portion 20 has a recess 22 in which the surface on one surface side of the resin film 10 is recessed.
- the step (depth of the concave portion) between the non-polarizing portion and the other portion is, for example, 0.02 ⁇ m or more.
- the step is preferably 2 ⁇ m or less, more preferably 1 ⁇ m or less.
- a non-polarizing part is formed by decolorization described later, such a step may be formed. If the upper limit of the step is in such a range, the influence on the appearance is satisfactorily suppressed.
- “step (depth of recess)” refers to the depth of the deepest portion of the recess.
- the concave portion in which the surface on the one surface side is recessed is formed, for example, by applying a decoloring liquid described later from only one surface side of the polarizer (polarizer intermediate).
- a decoloring liquid described later from only one surface side of the polarizer (polarizer intermediate).
- the non-polarizing portion is a low concentration portion where the content of the dichroic material is relatively low.
- the low-concentration part has a lower dichroic substance content than other parts.
- the non-polarizing portion is formed mechanically (for example, by a method of mechanically cutting off using a sculpture blade punching, a plotter, a water jet, etc.), a crack, Quality problems such as delamination (delamination) and paste sticking are avoided.
- the content of the dichroic substance itself is low in the low-concentration part, the transparency of the non-polarizing part is higher than when the non-polarizing part is formed by decomposing the dichroic substance with laser light or the like. Maintained well.
- the low concentration portion is a portion where the content of the dichroic substance is lower than that of the other portion.
- the content of the dichroic substance in the low concentration part is preferably 1.0% by weight or less, more preferably 0.5% by weight or less, and still more preferably 0.2% by weight or less. If the content of the dichroic substance in the low concentration part is within such a range, the desired transparency can be sufficiently imparted to the low concentration part.
- the lower limit value of the content of the dichroic substance in the low concentration part is usually not more than the detection limit value.
- the iodine content is obtained from a calibration curve prepared in advance using a standard sample, for example, from the X-ray intensity measured by fluorescent X-ray analysis.
- the difference between the content of the dichroic substance in the other part and the content of the dichroic substance in the low concentration part is preferably 0.5% by weight or more, more preferably 1% by weight or more. When the difference in content is within such a range, a low concentration part having desired transparency can be formed.
- the low concentration part has an alkali metal and / or alkaline earth metal content of 3.6% by weight or less, preferably 2.5% by weight or less, more preferably 1.0% by weight or less. More preferably, it is 0.5% by weight or less. If the content of alkali metal and / or alkaline earth metal in the low concentration part is within such a range, the shape of the low concentration part formed by contact with the basic solution described later can be maintained well. (In other words, a low concentration part having excellent dimensional stability can be realized).
- the said content can be calculated
- the transmittance of the non-polarizing part is preferably 50% or more, more preferably 60% or more, still more preferably 75% or more, and particularly preferably 90% or more. It is. With such a transmittance, the low concentration portion has desired transparency. As a result, when the polarizer is disposed so as to correspond to the camera unit of the image display device, it is possible to prevent an adverse effect on the shooting performance of the camera.
- the small circular non-polarizing portion 20 is formed at the center of the upper end portion of the resin film 10, but the arrangement, shape, size, etc. of the non-polarizing portion can be designed as appropriate. For example, it is designed according to the position, shape, size, etc. of the camera unit of the mounted image display device. Specifically, it is designed so that the non-polarizing portion does not correspond to the display screen of the mounted image display device.
- any appropriate shape can be adopted as the planar view shape of the non-polarizing portion 20 as long as it does not adversely affect the camera performance of the image display device using the polarizer.
- Specific examples include a circle, an ellipse, a square, a rectangle, and a rhombus.
- the polarizer of the present invention may be long.
- the sheet-like polarizer can be obtained by cutting a long polarizer into a predetermined size or by cutting out from a long polarizer.
- the elongated polarizer will be described.
- FIG. 3 is a schematic perspective view of a long polarizer.
- the long polarizer 101 is typically wound in a roll shape as shown in FIG.
- “long shape” means an elongated shape having a sufficiently long length with respect to the width.
- the polarizer 101 has the non-polarization part 20 arrange
- the arrangement pattern of the non-polarizing part 20 can be appropriately set according to the purpose.
- the non-polarizing unit 20 is cut into a predetermined size (for example, cutting and punching in the longitudinal direction and / or the width direction) in order to attach the polarizer 101 to an image display device of a predetermined size, It is arranged at a position corresponding to the camera unit of the image display device. Therefore, when only one size polarizer is cut from one long polarizer 101, the non-polarizing portion 20 is substantially in both the long direction and the width direction as shown in FIG. Can be arranged at regular intervals. With such a configuration, it is easy to control the cutting of the polarizer to a predetermined size in accordance with the size of the image display device, and the yield can be improved.
- a predetermined size for example, cutting and punching in the longitudinal direction and / or the width direction
- substantially equidistant in both the longitudinal direction and the width direction means that the spacing in the longitudinal direction is equal and the spacing in the width direction is equal.
- the interval in the scale direction and the interval in the width direction need not be equal.
- L1 L2 may be satisfied, or L1 ⁇ L2.
- the non-polarizing parts 20 may be arranged at substantially equal intervals in the longitudinal direction and may be arranged at different intervals in the width direction; arranged at different intervals in the longitudinal direction and in the width direction. They may be arranged at substantially equal intervals.
- the intervals between adjacent non-polarizing portions may be all different, and only a part (the interval between specific adjacent non-polarizing portions) is different. It may be.
- a plurality of regions may be defined in the longitudinal direction of the polarizer 101, and the interval between the non-polarizing portions 20 in the longitudinal direction and / or the width direction may be set for each region.
- the non-polarizing portion can be formed with any appropriate arrangement pattern according to the purpose in the long polarizer.
- FIG. 4A is a schematic plan view illustrating an example of an arrangement pattern of non-polarizing portions in a polarizer according to an embodiment of the present invention
- FIG. 4B is a schematic plan view illustrating another example of an arrangement pattern of non-polarizing portions
- FIG. 4C is a schematic plan view illustrating still another example of the arrangement pattern of the non-polarizing portions.
- the non-polarizing portion 20 has a straight line that connects adjacent non-polarizing portions in the longitudinal direction substantially parallel to the longitudinal direction, and has a width. A straight line connecting adjacent non-polarizing portions in the direction is arranged so as to be substantially parallel to the width direction.
- the present embodiment corresponds to the arrangement pattern of the non-polarizing portions in the polarizer shown in FIG.
- the non-polarizing part 20 has a straight line connecting adjacent non-polarizing parts in the longitudinal direction substantially parallel to the longitudinal direction, and a width. a straight line connecting the unpolarized portions adjacent in the direction, is arranged to have a predetermined angle theta W in the width direction.
- the non-polarizing part 20 has a straight line connecting non-polarizing parts adjacent in the longitudinal direction having a predetermined angle ⁇ L with respect to the longitudinal direction, In addition, the straight line connecting the non-polarizing portions adjacent in the width direction is arranged to have a predetermined angle ⁇ W with respect to the width direction.
- ⁇ L and / or ⁇ W is preferably more than 0 ° and not more than ⁇ 10 °.
- “ ⁇ ” means to include both clockwise and counterclockwise directions with respect to the reference direction (long direction or width direction).
- FIGS. 4B and 4C have the following advantages: In some image display devices, the polarizer absorption axis is maximized relative to the long or short side of the device to improve display characteristics. There may be a case where it is required to dispose about 10 degrees. As will be described later, the absorption axis of the polarizer is expressed in the longitudinal direction or the width direction. Therefore, in such a case, the direction of the absorption axis of the cut sheet-shaped polarizer 100 is used in such a case.
- the non-polarizing portion 20 has a straight line connecting non-polarizing portions adjacent in the longitudinal direction having a predetermined angle ⁇ L with respect to the longitudinal direction, and a straight line connecting adjacent non-polarizing portions in the width direction. May be arranged so as to be substantially parallel to the width direction.
- a plurality of regions may be defined in the longitudinal direction of the polarizer 101, and ⁇ L and / or ⁇ W may be set for each region.
- the absorption axis of the elongated polarizer can be set in any appropriate direction depending on the purpose.
- the direction of the absorption axis may be, for example, the long direction or the width direction.
- a polarizer having an absorption axis in the longitudinal direction has an advantage of excellent manufacturing efficiency.
- a polarizer having an absorption axis in the width direction has an advantage that it can be laminated with, for example, a so-called roll-to-roll with a retardation film having a slow axis in the longitudinal direction.
- the absorption axis is substantially parallel to the longitudinal direction or the width direction, and both ends of the polarizer are slit in parallel to the longitudinal direction. With such a configuration, by performing a cutting operation with reference to the end face of the polarizer, a plurality of polarizers having a non-polarizing portion and having an absorption axis in an appropriate direction can be easily manufactured. .
- FIG. 5 is a schematic cross-sectional view of a polarizing plate according to one embodiment of the present invention. In FIG. 5, the recess 22 is omitted.
- the polarizing plate 300 includes a polarizer 100 and protective films 110 and 120 disposed on both sides of the polarizer 100. In the illustrated example, the protective film is disposed on both sides of the polarizer, but the protective film may be disposed only on one side.
- the material for forming the protective film examples include cellulose resins such as diacetyl cellulose and triacetyl cellulose, (meth) acrylic resins, cycloolefin resins, olefin resins such as polypropylene, and ester resins such as polyethylene terephthalate resins. , Polyamide resins, polycarbonate resins, and copolymer resins thereof.
- One of the protective films 110 and 120 may be omitted depending on the purpose and desired configuration. In the present specification, when the protective film is simply referred to, it means a polarizer protective film such as the protective films 110 and 120, and the surface protective film (film that temporarily protects the polarizing plate during operation) described in the section C. Is different.
- a polarizing plate including a sheet-like polarizer 100 (that is, a sheet-like polarizing plate) is described.
- the polarizing plate may be a single-wafer or a long one.
- the long polarizing plate can be obtained by laminating a long polarizer and a long protective film by, for example, roll-to-roll.
- a sheet-like polarizing plate may be obtained by laminating a sheet-like protective film on a sheet-like polarizer, or may be cut into a predetermined size from a long polarizing plate.
- the thickness of the protective film is typically 10 ⁇ m to 100 ⁇ m.
- the protective film is typically laminated on the polarizer via an adhesive layer (specifically, an adhesive layer or an adhesive layer).
- the adhesive layer is typically formed of a PVA adhesive or an active energy ray curable adhesive.
- the pressure-sensitive adhesive layer is typically formed of an acrylic pressure-sensitive adhesive.
- the thickness of a protective film is 80 micrometers or less.
- the polarizing plate 300 has an adhesive layer 130 as the outermost layer.
- the pressure-sensitive adhesive layer 130 is typically the outermost layer on the image display device side.
- a separator 132 is temporarily attached to the pressure-sensitive adhesive layer 130 so as to be peeled off, and the pressure-sensitive adhesive layer is protected until actual use, and a roll can be formed.
- the polarizing plate 300 may further include any appropriate optical functional layer depending on the purpose.
- the optical functional layer include a retardation film (optical compensation film) and a surface treatment layer.
- a retardation film may be disposed between the protective film 120 and the pressure-sensitive adhesive layer 130 (not shown).
- the optical characteristics (for example, refractive index ellipsoid, in-plane retardation, thickness direction retardation) of the retardation film can be appropriately set according to the purpose, characteristics of the image display device, and the like.
- the image display device is an IPS mode liquid crystal display device
- a retardation film in which the refractive index ellipsoid is nx> ny> nz and a retardation film in which the refractive index ellipsoid is nz> nx> ny.
- the retardation film may also serve as a protective film.
- the protective film 120 may be omitted.
- the protective film 120 may have an optical compensation function (that is, may have an appropriate refractive index ellipsoid, an in-plane retardation, and a thickness direction retardation depending on the purpose).
- Nx is the refractive index in the direction in which the refractive index in the film plane is maximum (ie, the slow axis direction), and “ny” is the refractive index in the direction perpendicular to the slow axis in the film plane. “Nz” is the refractive index in the thickness direction.
- the surface treatment layer may be disposed outside the protective film 110 (not shown).
- Typical examples of the surface treatment layer include a hard coat layer, an antireflection layer, and an antiglare layer.
- the surface treatment layer is preferably a layer having a low moisture permeability for the purpose of improving the humidification durability of the polarizer.
- the hard coat layer is provided for the purpose of preventing scratches on the surface of the polarizing plate.
- the hard coat layer can be formed by, for example, a method of adding a cured film excellent in hardness, slipping properties, etc., to an appropriate ultraviolet curable resin such as acrylic or silicone.
- the hard coat layer preferably has a pencil hardness of 2H or more.
- the antireflection layer is a low reflection layer provided for the purpose of preventing reflection of external light on the surface of the polarizing plate.
- the antireflection layer for example, a thin layer type for preventing reflection by utilizing a canceling effect of reflected light by the interference action of light as disclosed in JP-A-2005-248173, JP-A-2011-2759
- the surface structure type which expresses a low reflectance by giving a fine structure to the surface as disclosed in (1).
- the antiglare layer is provided for the purpose of preventing external light from being reflected on the surface of the polarizing plate and hindering the viewing of the light transmitted through the polarizing plate.
- the antiglare layer is formed, for example, by imparting a fine concavo-convex structure to the surface by an appropriate method such as a roughening method by a sandblasting method or an embossing method, or a blending method of transparent fine particles.
- the antiglare layer may also serve as a diffusion layer (viewing angle expanding function or the like) for diffusing the light transmitted through the polarizing plate to expand the viewing angle.
- the surface of the protective film 110 may be subjected to the same surface treatment.
- the sheet-like polarizer can be obtained by cutting the obtained long polarizer into a predetermined size.
- the resin film (typically, PVA-based resin film) constituting the polarizer may be a single film, or a resin layer (typically, PVA resin layer).
- the PVA-based resin layer may be formed by applying a coating solution containing a PVA-based resin on a resin substrate, or may be formed by laminating a PVA-based resin film on a resin substrate.
- a polarizer is a PVA-type resin layer formed on the resin base material is demonstrated concretely.
- the case where the PVA resin layer is applied and formed will be described, but the same applies to the case where the PVA resin film is laminated.
- a polarizer is a single PVA-type resin film, since a polarizer can be produced by the method well-known and used in this industry, detailed description is abbreviate
- omitted is abbreviate
- a PVA resin layer is formed on a resin substrate by applying a coating liquid containing a PVA resin and drying it.
- a laminate of PVA resin layers is prepared.
- thermoplastic resin can be adopted as a material for forming the resin base material.
- the thermoplastic resin include ester resins such as polyethylene terephthalate resins, cycloolefin resins such as norbornene resins, olefin resins such as polypropylene, polyamide resins, polycarbonate resins, and copolymer resins thereof. Is mentioned. Among these, preferred are norbornene resins and amorphous polyethylene terephthalate resins.
- an amorphous (non-crystallized) polyethylene terephthalate resin is preferably used.
- amorphous (hard to crystallize) polyethylene terephthalate resin is particularly preferably used.
- Specific examples of the amorphous polyethylene terephthalate resin include a copolymer further containing isophthalic acid as a dicarboxylic acid, and a copolymer further containing cyclohexanedimethanol as a glycol.
- the resin base material absorbs water, and the water can be plasticized by acting as a plasticizer.
- the stretching stress can be greatly reduced, the film can be stretched at a high magnification, and the stretchability can be superior to that during air stretching.
- a polarizer having excellent optical characteristics can be produced.
- the resin base material preferably has a water absorption rate of 0.2% or more, and more preferably 0.3% or more.
- the water absorption rate of the resin base material is preferably 3.0% or less, more preferably 1.0% or less.
- the water absorption rate of the resin base material can be adjusted, for example, by introducing a modifying group into the forming material.
- the water absorption is a value determined according to JIS K 7209.
- the glass transition temperature (Tg) of the resin base material is preferably 170 ° C. or lower.
- the stretchability of the laminate can be sufficiently ensured while suppressing crystallization of the PVA-based resin layer.
- the temperature is more preferably 120 ° C. or lower.
- the glass transition temperature of the resin substrate is preferably 60 ° C. or higher.
- the PVA-based resin layer can be satisfactorily stretched at a suitable temperature (for example, about 60 ° C.).
- a glass transition temperature lower than 60 ° C. may be used as long as the resin base material does not deform when applying and drying a coating solution containing a PVA-based resin.
- the glass transition temperature of the resin substrate can be adjusted by, for example, heating using a crystallization material that introduces a modifying group into the forming material.
- the glass transition temperature (Tg) is a value determined according to JIS K 7121.
- the thickness of the resin base material before stretching is preferably 20 ⁇ m to 300 ⁇ m, more preferably 50 ⁇ m to 200 ⁇ m. If it is less than 20 ⁇ m, it may be difficult to form a PVA-based resin layer. If it exceeds 300 ⁇ m, for example, in stretching in water, it takes a long time for the resin base material to absorb water, and an excessive load may be required for stretching.
- the PVA-based resin forming the PVA-based resin layer is as described in the above section A.
- the coating solution is typically a solution obtained by dissolving the PVA resin in a solvent.
- the solvent include water, dimethyl sulfoxide, dimethylformamide, dimethylacetamide, N-methylpyrrolidone, various glycols, polyhydric alcohols such as trimethylolpropane, and amines such as ethylenediamine and diethylenetriamine. These may be used alone or in combination of two or more. Among these, water is preferable.
- the concentration of the PVA resin in the solution is preferably 3 to 20 parts by weight with respect to 100 parts by weight of the solvent. With such a resin concentration, a uniform coating film in close contact with the resin substrate can be formed.
- Additives may be added to the coating solution.
- the additive include a plasticizer and a surfactant.
- the plasticizer include polyhydric alcohols such as ethylene glycol and glycerin.
- the surfactant include nonionic surfactants. These can be used for the purpose of further improving the uniformity, dyeability and stretchability of the resulting PVA-based resin layer.
- any appropriate method can be adopted as a coating method of the coating solution. Examples thereof include a roll coating method, a spin coating method, a wire bar coating method, a dip coating method, a die coating method, a curtain coating method, a spray coating method, a knife coating method (comma coating method and the like).
- the coating / drying temperature of the coating solution is preferably 50 ° C. or higher.
- the thickness of the PVA resin layer before stretching is preferably 3 ⁇ m to 40 ⁇ m, and more preferably 3 ⁇ m to 20 ⁇ m.
- the resin substrate Before forming the PVA-based resin layer, the resin substrate may be subjected to surface treatment (for example, corona treatment), or an easy-adhesion layer may be formed on the resin substrate. By performing such a treatment, the adhesion between the resin substrate and the PVA resin layer can be improved.
- surface treatment for example, corona treatment
- an easy-adhesion layer may be formed on the resin substrate.
- Stretching of laminated body Any appropriate method may be adopted as a stretching method of the laminated body. Specifically, it may be fixed end stretching or free end stretching (for example, a method of uniaxial stretching through a laminate between rolls having different peripheral speeds). Preferably, it is free end stretching.
- the stretching direction of the laminate can be appropriately set. In one embodiment, it extends
- the stretching method is not particularly limited, and may be an air stretching method or an underwater stretching method.
- the underwater stretching method is preferable. According to the underwater stretching method, the resin base material and the PVA resin layer can be stretched at a temperature lower than the glass transition temperature (typically about 80 ° C.), and the crystallization of the PVA resin layer is suppressed. However, it can be stretched at a high magnification. As a result, a polarizer having excellent optical characteristics can be produced.
- the stretching of the laminate may be performed in one stage or in multiple stages.
- the free end stretching and the fixed end stretching may be combined, or the underwater stretching method and the air stretching method may be combined.
- the draw ratio (maximum draw ratio) of the laminated body mentioned later is a product of the draw ratio of each step.
- the stretching temperature of the laminate can be set to any appropriate value depending on the resin base material, the stretching method, and the like.
- the stretching temperature is preferably equal to or higher than the glass transition temperature (Tg) of the resin substrate, more preferably the glass transition temperature (Tg) of the resin substrate + 10 ° C., and particularly preferably Tg + 15 ° C. That's it.
- the stretching temperature of the laminate is preferably 170 ° C. or lower.
- the liquid temperature of the stretching bath is preferably 40 ° C. to 85 ° C., more preferably 50 ° C. to 85 ° C. If it is such temperature, it can extend
- the glass transition temperature (Tg) of the resin base material is preferably 60 ° C. or higher in relation to the formation of the PVA-based resin layer.
- Tg glass transition temperature
- the stretching temperature is lower than 40 ° C., there is a possibility that the stretching cannot be satisfactorily performed even in consideration of plasticization of the resin base material with water.
- the higher the temperature of the stretching bath the higher the solubility of the PVA-based resin layer, and there is a possibility that excellent optical properties cannot be obtained.
- the immersion time of the laminate in the stretching bath is preferably 15 seconds to 5 minutes.
- the laminate When employing an underwater stretching method, it is preferable to stretch the laminate by immersing it in an aqueous boric acid solution (stretching in boric acid in water).
- an aqueous boric acid solution as the stretching bath, the PVA resin layer can be provided with rigidity that can withstand the tension applied during stretching and water resistance that does not dissolve in water.
- boric acid can form a tetrahydroxyborate anion in an aqueous solution and crosslink with a PVA resin by hydrogen bonding.
- rigidity and water resistance can be imparted to the PVA-based resin layer, the film can be stretched well, and a polarizer having excellent optical characteristics can be produced.
- the boric acid aqueous solution is preferably obtained by dissolving boric acid and / or borate in water as a solvent.
- the boric acid concentration is preferably 1 to 10 parts by weight with respect to 100 parts by weight of water. By setting the boric acid concentration to 1 part by weight or more, dissolution of the PVA-based resin layer can be effectively suppressed, and a polarizer having higher characteristics can be produced.
- an aqueous solution obtained by dissolving a boron compound such as borax, glyoxal, glutaraldehyde, or the like in a solvent can also be used.
- a dichroic substance typically iodine
- an iodide is blended in the stretching bath (boric acid aqueous solution).
- the iodide include potassium iodide, lithium iodide, sodium iodide, zinc iodide, aluminum iodide, lead iodide, copper iodide, barium iodide, calcium iodide, tin iodide, and titanium iodide.
- the concentration of iodide is preferably 0.05 to 15 parts by weight, more preferably 0.5 to 8 parts by weight with respect to 100 parts by weight of water.
- the draw ratio (maximum draw ratio) of the laminate is preferably 5.0 times or more with respect to the original length of the laminate. Such a high draw ratio can be achieved, for example, by employing an underwater drawing method (boric acid underwater drawing).
- the “maximum stretch ratio” refers to a stretch ratio immediately before the laminate is ruptured. Separately, a stretch ratio at which the laminate is ruptured is confirmed, and a value that is 0.2 lower than that value. .
- the laminate is stretched in air at a high temperature (for example, 95 ° C. or higher), and then stretched in boric acid in water and dyeing described later.
- air stretching can be positioned as preliminary or auxiliary stretching for boric acid water stretching, and is hereinafter referred to as “air-assisted stretching”.
- the laminate can be stretched at a higher magnification by combining air-assisted stretching.
- a polarizer having more excellent optical properties for example, the degree of polarization
- the orientation of the resin base material is suppressed by combining the air auxiliary stretching and the boric acid water stretching rather than stretching by boric acid water stretching alone. While stretching.
- the orientation of the resin base material is improved, the stretching tension increases, and stable stretching becomes difficult or breaks. Therefore, the laminate can be stretched at a higher magnification by stretching while suppressing the orientation of the resin substrate.
- the orientation of the PVA-based resin can be improved, whereby the orientation of the PVA-based resin can be improved even after stretching in boric acid water.
- the PVA resin is easily cross-linked with boric acid during boric acid water stretching, and boric acid is a nodal point. It is presumed that the orientation of the PVA-based resin is increased even after stretching in boric acid solution by being stretched in such a state. As a result, a polarizer having excellent optical characteristics (for example, the degree of polarization) can be produced.
- the stretching ratio in the air auxiliary stretching is preferably 3.5 times or less.
- the stretching temperature of the air auxiliary stretching is preferably equal to or higher than the glass transition temperature of the PVA resin.
- the stretching temperature is preferably 95 ° C to 150 ° C.
- the maximum draw ratio in the case of combining the air auxiliary stretching and the boric acid solution stretching is preferably 5.0 times or more, more preferably 5.5 times or more, and further preferably, the original length of the laminate. Is 6.0 times or more.
- the dyeing is typically performed by adsorbing a dichroic substance (preferably iodine) to the PVA resin layer.
- adsorption method for example, a method of immersing a PVA resin layer (laminate) in a staining solution containing iodine, a method of applying the staining solution to the PVA resin layer, and applying the staining solution to the PVA resin layer The method of spraying etc. are mentioned.
- it is a method of immersing the laminate in the staining solution. This is because iodine can be adsorbed well.
- the staining solution is preferably an iodine aqueous solution.
- the amount of iodine is preferably 0.1 to 0.5 parts by weight with respect to 100 parts by weight of water.
- an iodide is added to the aqueous iodine solution. Specific examples of the iodide are as described above.
- the blending amount of iodide is preferably 0.02 to 20 parts by weight, more preferably 0.1 to 10 parts by weight with respect to 100 parts by weight of water.
- the liquid temperature during dyeing of the dyeing liquid is preferably 20 ° C. to 50 ° C. in order to suppress dissolution of the PVA resin.
- the immersion time is preferably 5 seconds to 5 minutes in order to ensure the transmittance of the PVA resin layer.
- the staining conditions concentration, liquid temperature, immersion time
- immersion time is set so that the polarization degree of the polarizer obtained may be 99.98% or more.
- the immersion time is set so that the single transmittance of the obtained polarizer is 40% to 44%.
- the staining process can be performed at any appropriate timing.
- it performs before an underwater extending
- the laminate may be appropriately subjected to a treatment for using the PVA resin layer as a polarizer (or a polarizer intermediate).
- a treatment for using the PVA resin layer as a polarizer (or a polarizer intermediate).
- the treatment for obtaining a polarizer include insolubilization treatment, crosslinking treatment, washing treatment, and drying treatment.
- count, order, etc. of these processes are not specifically limited.
- the insolubilization treatment is typically performed by immersing the PVA resin layer in a boric acid aqueous solution.
- a boric acid aqueous solution By performing the insolubilization treatment, water resistance can be imparted to the PVA resin layer.
- the concentration of the boric acid aqueous solution is preferably 1 to 4 parts by weight with respect to 100 parts by weight of water.
- the liquid temperature of the insolubilizing bath (boric acid aqueous solution) is preferably 20 ° C. to 50 ° C.
- the insolubilization treatment is performed before the above-described underwater stretching or the above-described dyeing treatment.
- the cross-linking treatment is typically performed by immersing the PVA resin layer in an aqueous boric acid solution.
- the concentration of the boric acid aqueous solution is preferably 1 to 5 parts by weight with respect to 100 parts by weight of water.
- the blending amount of iodide is preferably 1 to 5 parts by weight with respect to 100 parts by weight of water.
- the liquid temperature of the crosslinking bath is preferably 20 ° C. to 60 ° C.
- the crosslinking treatment is performed before the underwater stretching.
- the dyeing process, the crosslinking process and the underwater stretching are performed in this order.
- the cleaning treatment is typically performed by immersing the PVA resin layer in an aqueous potassium iodide solution.
- the drying temperature in the drying treatment is preferably 30 ° C. to 100 ° C.
- a polarizer (polarizer intermediate) is formed on the resin substrate. If necessary, the protective film is bonded and / or the resin substrate is peeled off. In one embodiment, a protective film is bonded to the surface of the polarizer of the resin substrate / polarizer laminate by roll-to-roll, and then the resin substrate is peeled off. In this way, a polarizer / protective film laminate (polarizing plate) is obtained.
- the protective film in this polarizing plate can typically correspond to the protective film 120 (protective film on the image display device side) 120 in FIG. As described above, the protective film may have an optical compensation function.
- the polarizer intermediate means a polarizer before the non-polarizing part is formed, and is intended to be distinguished from the polarizer of the present invention having the non-polarizing part. Therefore, in the present specification, the polarizer intermediate may be simply referred to as a polarizer in the context. A person skilled in the art can easily understand from the description in this specification whether “polarizer” means a polarizer intermediate or the polarizer of the present invention.
- the non-polarizing portion is formed at a predetermined position of the polarizer intermediate obtained in the above section C-1 to obtain the polarizer of the present invention.
- the polarizer (polarizer intermediate) is formed from a PVA-based resin layer coated on a resin substrate, typically, a resin substrate / polarizer laminate or protective film /
- the laminated body (polarizing plate) of a polarizer is used for formation of a non-polarizing part.
- the polarizer (polarizer intermediate) is a single resin film, typically, the polarizer alone or a laminate of the protective film / polarizer (polarizing plate) serves to form the non-polarizing portion. Is done.
- a non-polarization part is demonstrated concretely.
- a protective film / polarizer laminate (hereinafter, simply referred to as a polarizing plate in this section) is subjected to decolorization by chemical treatment (hereinafter, also referred to as chemical decolorization treatment), so that the polarizer (polarizer intermediate) is non-polarized.
- chemical treatment hereinafter, also referred to as chemical decolorization treatment
- polarizer intermediate polarizer intermediate
- a surface protective film having through-holes arranged in a predetermined pattern is bonded to the polarizer side surface of the polarizing plate by roll-to-roll.
- roll-to-roll means that the roll-shaped film is bonded together while aligning the long direction.
- the surface protective film having a through hole is detachably bonded to the polarizer via any appropriate pressure-sensitive adhesive.
- the first surface protective film has through holes arranged in a predetermined pattern.
- the position where the through hole is provided corresponds to the position where the non-polarizing portion of the polarizer (polarizer intermediate) is formed.
- the arrangement pattern of the through holes shown in FIG. 6 corresponds to the arrangement pattern of the non-polarizing parts shown in FIG. 4A.
- the through hole may have any suitable shape.
- the shape of the through hole corresponds to the shape of the non-polarizing portion formed in plan view.
- the through holes can be formed, for example, by mechanical punching (eg, punching, engraving blade punching, plotter, water jet) or removal of a predetermined portion of the film (eg, laser ablation or chemical dissolution).
- the first surface protective film is preferably a film having high hardness (for example, elastic modulus). This is because the deformation of the through-hole during conveyance and / or bonding can be prevented.
- the material for forming the first surface protective film include ester resins such as polyethylene terephthalate resins, cycloolefin resins such as norbornene resins, olefin resins such as polypropylene, polyamide resins, and polycarbonate resins. Polymer resin etc. are mentioned. Preference is given to ester resins (especially polyethylene terephthalate resins). Such a material has an advantage that the elastic modulus is sufficiently high and deformation of the through-hole hardly occurs even when tension is applied during conveyance and / or bonding.
- the thickness of the first surface protective film is typically 20 ⁇ m to 250 ⁇ m, preferably 30 ⁇ m to 150 ⁇ m. With such a thickness, there is an advantage that deformation of the through hole hardly occurs even when tension is applied during conveyance and / or bonding.
- the elastic modulus of the first surface protective film is preferably 2.2 kN / mm 2 to 4.8 kN / mm 2 . If the elastic modulus of the first surface protective film is in such a range, there is an advantage that deformation of the through-hole hardly occurs even when tension is applied during transportation and / or bonding.
- the elastic modulus is measured according to JIS K 6781.
- the tensile elongation of the first surface protective film is preferably 90% to 170%. If the tensile elongation of the first surface protective film is in such a range, there is an advantage that it is difficult to break during transportation.
- the tensile elongation is measured according to JIS K 6781.
- a second surface protective film is bonded to the surface of the polarizing plate on the protective film side by roll-to-roll.
- the second surface protective film is detachably bonded to the protective film via any appropriate pressure-sensitive adhesive.
- the polarizing plate polarizer intermediate / protective film
- the second surface protective film a film similar to the first surface protective film can be used except that no through-hole is provided.
- a soft (eg, low elastic modulus) film such as a polyolefin (eg, polyethylene) film can be used.
- the second surface protective film may be bonded simultaneously with the first surface protective film, may be bonded before the first surface protective film is bonded, or after the first surface protective film is bonded. You may stick together.
- the second surface protective film is bonded before the first surface protective film is bonded. With such a procedure, the protective film can be prevented from being damaged, and the through hole formed in the first surface protective film at the time of winding can be prevented from being transferred as a mark to the protective film.
- the second surface protective film is bonded before the first surface protective film is bonded, for example, a laminate of the polarizer protective film and the second surface protective film is prepared, and the laminate is resin After bonding to the substrate / polarizer laminate, the resin substrate can be peeled off, and the first surface protective film can be attached to the peeled surface.
- the laminate of the first surface protective film / polarizer (polarizer intermediate) / protective film / second surface protective film is subjected to a chemical decoloration treatment.
- the chemical decolorization treatment includes contacting the laminate with a basic solution.
- iodine is used as the dichroic substance, the iodine content in the contact portion can be easily reduced by bringing the basic solution into contact with a desired portion of the resin film.
- the contact between the laminate and the basic solution can be performed by any appropriate means. Typical examples include soaking the laminate in a basic solution, or applying or spraying the basic solution onto the laminate. Immersion is preferred. This is because, as shown in FIG. 7, the decolorization process can be performed while the laminate is being conveyed, so that the manufacturing efficiency is remarkably high. As described above, immersion can be performed by using the first surface protective film (and the second surface protective film as necessary). Specifically, by immersing in a basic solution, only the portion corresponding to the through hole of the first surface protective film in the polarizer (polarizer intermediate) comes into contact with the basic solution.
- the non-polarizing portion can be selectively formed only in the contact portion (which can be set by the through hole of the first surface protective film).
- the non-polarizing portion can be selectively formed in a predetermined portion of the polarizer (polarizer intermediate) with very high manufacturing efficiency without complicated operation. .
- the iodine complex is formed again with the use of the polarizer, and the non-polarizing part is desired. There is a risk that it will not have the characteristics.
- iodine itself is removed from the polarizer (substantially the non-polarizing part) by removing the basic solution described later. As a result, it is possible to prevent a change in the characteristics of the non-polarizing part accompanying the use of the polarizer.
- the concave portion can be formed only on one surface side of the resin film. In this case, control of the depth of the recess is significantly easier than when the recess is formed on both surfaces of the resin film. As a result, it becomes easy to suppress the influence on the appearance.
- the formation of the non-polarizing part by the basic solution will be described in detail.
- the basic solution penetrates into the predetermined part.
- the iodine complex contained in the predetermined portion is reduced by the base contained in the basic solution to become iodine ions.
- the polarization performance of the part is substantially lost, and a non-polarizing part is formed in the part.
- permeability of the said part improves by reduction
- a non-polarizing portion (low concentration portion) is selectively formed in a predetermined portion of the polarizer (polarizer intermediate), and the non-polarizing portion is stable without change over time.
- the basic solution penetrates to an undesired portion. (As a result, a non-polarizing portion is formed in an undesired portion) can be prevented.
- any appropriate basic compound can be used as the basic compound contained in the basic solution.
- Examples of basic compounds include hydroxides of alkali metals such as sodium hydroxide, potassium hydroxide and lithium hydroxide, hydroxides of alkaline earth metals such as calcium hydroxide, inorganic alkali metal salts such as sodium carbonate, acetic acid Organic alkali metal salts such as sodium, aqueous ammonia and the like can be mentioned.
- an alkali metal and / or alkaline earth metal hydroxide is preferably used, and sodium hydroxide, potassium hydroxide, and lithium hydroxide are more preferably used.
- An iodine complex can be efficiently ionized and a non-polarization part can be formed more simply.
- These basic compounds may be used alone or in combination of two or more.
- any appropriate solvent can be used as the solvent of the basic solution.
- Specific examples include water, alcohols such as ethanol and methanol, ethers, benzene, chloroform, and mixed solvents thereof. Since iodine ions migrate to the solvent satisfactorily and iodine ions can be easily removed in the subsequent removal of the basic solution, the solvent is preferably water or alcohol.
- the concentration of the basic solution is, for example, 0.01N to 5N, preferably 0.05N to 3N, and more preferably 0.1N to 2.5N. If the concentration of the basic solution is in such a range, the iodine concentration inside the polarizer (polarizer intermediate) can be efficiently reduced, and ionization of the iodine complex in a portion other than the predetermined portion can be prevented. be able to. Furthermore, such a concentration makes it easy to control the depth of the recesses that can be formed.
- the liquid temperature of the basic solution is, for example, 20 ° C. to 50 ° C.
- the contact time between the laminate (substantially a predetermined part of the polarizer intermediate) and the basic solution is determined by the thickness of the polarizer intermediate, the type of basic compound contained in the basic solution used, and the base
- the concentration can be set according to the concentration of the active compound, for example, 5 seconds to 30 minutes. When the contact time is in such a range, a recess having an appropriate depth can be formed.
- the polarizer (resin film) may contain boric acid.
- boric acid can be contained by bringing a boric acid solution (for example, a boric acid aqueous solution) into contact with each other during the stretching treatment, the crosslinking treatment, or the like.
- the boric acid content of the polarizer (resin film) is, for example, 10% by weight to 30% by weight.
- the boric acid content in the contact portion with the basic solution is, for example, 5% by weight to 12% by weight.
- the alkali metal and / or alkaline earth metal contained in the resin film is reduced at the contact portion where the basic solution is contacted.
- a low concentration part having excellent dimensional stability can be obtained. Specifically, even in a humid environment, the shape of the low concentration part formed by contact with the basic solution can be maintained as it is.
- alkali metal and / or alkaline earth metal hydroxide By bringing a basic solution into contact with the resin film, alkali metal and / or alkaline earth metal hydroxide can remain in the contact portion. Further, by bringing a basic solution into contact with the resin film, an alkali metal and / or alkaline earth metal salt can be produced at the contact portion. These can generate hydroxide ions, and the generated hydroxide ions act (decompose and reduce) on the dichroic substance (for example, iodine complex) existing around the contact portion, thereby causing a non-polarized region (low level). Concentration range) can be widened. Therefore, by reducing the alkali metal and / or alkaline earth metal salt, it is considered that the non-polarized region can be prevented from spreading over time and the desired non-polarized part shape can be maintained.
- dichroic substance for example, iodine complex
- borate As a metal salt which can produce
- the borate can be generated by neutralizing boric acid contained in the resin film with a basic solution (a solution of an alkali metal hydroxide and / or an alkaline earth metal hydroxide).
- the borate (metaborate) can be hydrolyzed to generate hydroxide ions as shown in the following formula, for example, when a polarizer is placed in a humidified environment. (Wherein X represents an alkali metal or alkaline earth metal)
- the content of alkali metal and / or alkaline earth metal in the contact portion is 3.6% by weight or less, preferably 2.5% by weight or less, more preferably 1.0% by weight or less, and still more preferably 0.8%.
- the said content is reduced so that it may become 5 weight% or less.
- the alkali metal and / or alkaline-earth metal can be previously contained in the resin film by performing various treatments for forming a polarizer.
- potassium can be contained in the resin film by contacting an iodide solution such as potassium iodide.
- an iodide solution such as potassium iodide.
- a method of bringing the treatment liquid into contact with the basic solution is preferably used. According to such a method, the content of the alkali metal and / or alkaline earth metal can be reduced by transferring the alkali metal and / or alkaline earth metal from the resin film to the treatment liquid.
- any appropriate method can be adopted as the contact method of the treatment liquid.
- a method of dropping, coating, and spraying the treatment liquid on the contact portion with the basic solution, and a method of immersing the contact portion with the basic solution in the treatment solution can be mentioned.
- the resin film When the resin film is protected with any appropriate protective material when contacting with the basic solution, it is preferable to contact the treatment liquid as it is (particularly when the temperature of the treatment liquid is 50 ° C. or higher). According to such a form, it is possible to prevent the polarization characteristics from being deteriorated by the treatment liquid at a portion other than the contact portion with the basic solution.
- the treatment liquid may contain any appropriate solvent.
- the solvent include water, alcohols such as ethanol and methanol, ether, benzene, chloroform, and mixed solvents thereof.
- water and alcohol are preferably used from the viewpoint of efficiently transferring alkali metal and / or alkaline earth metal. Any appropriate water can be used as the water. For example, tap water, pure water, deionized water and the like can be mentioned.
- the temperature of the treatment liquid at the time of contact is, for example, 20 ° C. or higher, preferably 50 ° C. or higher, more preferably 60 ° C. or higher, and further preferably 70 ° C. or higher. If it is such temperature, an alkali metal and / or alkaline-earth metal can be efficiently transferred to a processing liquid. Specifically, the swelling rate of the resin film can be remarkably improved, and the alkali metal and / or alkaline earth metal in the resin film can be physically removed. On the other hand, the temperature of water is substantially 95 ° C. or less.
- the contact time can be appropriately adjusted according to the contact method, the temperature of the treatment liquid (water), the thickness of the resin film, and the like.
- the contact time is preferably 10 seconds to 30 minutes, more preferably 30 seconds to 15 minutes, and even more preferably 60 seconds to 10 minutes.
- an acidic solution is used as the treatment liquid.
- an acidic solution By using an acidic solution, the alkali metal and / or alkaline earth metal hydroxide remaining in the resin film is neutralized, and the alkali metal and / or alkaline earth metal in the resin film is chemically removed. be able to.
- any appropriate acidic compound can be used as the acidic compound contained in the acidic solution.
- the acidic compound include inorganic acids such as hydrochloric acid, sulfuric acid, nitric acid, hydrogen fluoride, and boric acid, and organic acids such as formic acid, oxalic acid, citric acid, acetic acid, and benzoic acid.
- the acidic compound contained in the acidic solution is preferably an inorganic acid, more preferably hydrochloric acid, sulfuric acid, or nitric acid. These acidic compounds may be used alone or in combination of two or more.
- an acidic compound having a higher acidity than boric acid is suitably used as the acidic compound. It is because it can act also on the metal salt (borate) of the alkali metal and / or alkaline earth metal. Specifically, boric acid can be liberated from the borate and the alkali metal and / or alkaline earth metal in the resin film can be chemically removed.
- the acidity index examples include an acid dissociation constant (pKa), and an acidic compound having a pKa smaller than that of boric acid (pKa (9.2)) is preferably used.
- pKa is preferably less than 9.2, more preferably 5 or less.
- the pKa may be measured using any appropriate measuring device, and values described in documents such as the Chemical Handbook, Basic Edition, Rev. 5 (Edited by The Chemical Society of Japan, Maruzen Publishing) may be referred to.
- the pKa value can change at each stage. When such an acidic compound is used, one having a pKa value in each stage within the above range is used.
- pKa means the value in 25 degreeC aqueous solution.
- the difference between the pKa of the acidic compound and the pKa of boric acid is, for example, 2.0 or more, preferably 2.5 to 15, and more preferably 2.5 to 13.
- the alkali metal and / or alkaline earth metal can be efficiently transferred to the treatment liquid, and as a result, the desired alkali metal and / or alkaline earth metal content in the low concentration part. Can be realized.
- Examples of acidic compounds that can satisfy the above pKa include hydrochloric acid (pKa: -3.7), sulfuric acid (pK 2 : 1.96), nitric acid (pKa: -1.8), hydrogen fluoride (pKa: 3 .17), inorganic acids such as boric acid (pKa: 9.2), formic acid (pKa: 3.54), oxalic acid (pK 1 : 1.04, pK 2 : 3.82), citric acid (pK 1 : 3.09, pK 2 : 4.75, pK 3 : 6.41), acetic acid (pKa: 4.8), benzoic acid (pKa: 4.0), and other organic acids.
- hydrochloric acid pKa: -3.7
- sulfuric acid pK 2 : 1.96
- nitric acid pKa: -1.8
- hydrogen fluoride pKa: 3 .17
- inorganic acids such as boric acid (pK
- treatment liquid The solvent of the acidic solution (treatment liquid) is as described above, and physical removal of the alkali metal and / or alkaline earth metal in the resin film occurs also in this embodiment using the acidic solution as the treatment liquid. obtain.
- the concentration of the acidic solution is, for example, 0.01N to 5N, preferably 0.05N to 3N, and more preferably 0.1N to 2.5N.
- the liquid temperature of the acidic solution is, for example, 20 ° C. to 50 ° C.
- the contact time with the acidic solution can be set according to the thickness of the resin film, the type of acidic compound, and the concentration of the acidic solution, and is, for example, 5 seconds to 30 minutes.
- the resin film may be further subjected to any appropriate other treatment besides the above treatment.
- Other treatments include removal of the basic solution and / or acidic solution, and washing.
- Specific examples of the method for removing the basic solution and / or the acidic solution include wiping removal with a waste cloth, suction removal, natural drying, heat drying, air drying, vacuum drying, and the like.
- the drying temperature is, for example, 20 ° C. to 100 ° C.
- the drying time is, for example, 5 seconds to 600 seconds.
- the cleaning process is performed by any appropriate method.
- the solution used for the washing treatment include pure water, alcohols such as methanol and ethanol, acidic aqueous solutions, and mixed solvents thereof.
- the cleaning is typically performed while transporting the laminate as shown in FIG.
- the cleaning process can be performed at any suitable stage.
- the cleaning process may be performed a plurality of times.
- the first surface protective film and the second surface protective film can be peeled and removed.
- the non-polarizing portion is formed in a predetermined arrangement pattern at a predetermined position of the long polarizer (polarizer intermediate), and the long polarizer according to the embodiment of the present invention is obtained.
- the sheet-like polarizer can be obtained by cutting a long polarizer into a predetermined size, for example.
- An image display device of the present invention includes the polarizer.
- the polarizer is cut according to the size of the image display device.
- Examples of the image display device include a liquid crystal display device and an organic EL device.
- the liquid crystal display device includes a liquid crystal panel including a liquid crystal cell and the polarizer disposed on one side or both sides of the liquid crystal cell.
- the organic EL device includes an organic EL panel in which the polarizer is disposed on the viewing side.
- the polarizer is arranged such that the non-polarizing part corresponds to the camera part of the image display device.
- Example 1 As the resin substrate, an amorphous isophthalic acid copolymerized polyethylene terephthalate (IPA copolymerized PET) film (thickness: 100 ⁇ m) having a long water absorption rate of 0.75% and Tg of 75 ° C. was used.
- IPA copolymerized PET amorphous isophthalic acid copolymerized polyethylene terephthalate
- One side of the substrate was subjected to corona treatment, and polyvinyl alcohol (degree of polymerization 4200, saponification degree 99.2 mol%) and acetoacetyl-modified PVA (degree of polymerization 1200, degree of acetoacetyl modification 4.6) were applied to this corona-treated surface.
- the laminate was immersed in an insolubilization bath (a boric acid aqueous solution obtained by blending 4 parts by weight of boric acid with respect to 100 parts by weight of water) for 30 seconds (insolubilization treatment). Subsequently, it was immersed in a dyeing bath having a liquid temperature of 30 ° C. while adjusting the iodine concentration and the immersion time so that the polarizing plate had a predetermined transmittance.
- 0.2 parts by weight of iodine was blended with 100 parts by weight of water and immersed in an aqueous iodine solution obtained by blending 1.5 parts by weight of potassium iodide (dyeing treatment). .
- a boric acid aqueous solution obtained by blending 3 parts by weight of potassium iodide and 3 parts by weight of boric acid with respect to 100 parts by weight of water was immersed for 30 seconds in a crosslinking bath having a liquid temperature of 30 ° C.
- a boric acid aqueous solution obtained by blending 3 parts by weight of potassium iodide and 3 parts by weight of boric acid with respect to 100 parts by weight of water (Crosslinking treatment).
- the laminate was immersed in a boric acid aqueous solution (an aqueous solution obtained by blending 4 parts by weight of boric acid and 5 parts by weight of potassium iodide with respect to 100 parts by weight of water) at a liquid temperature of 70 ° C.
- a protective film (thickness 25 ⁇ m) was bonded, and this was heated in an oven maintained at 60 ° C. for 5 minutes. Thereafter, the substrate was peeled from the PVA resin layer to obtain a long polarizing plate having a width of 1200 mm and a length of 43 m (5 ⁇ m thick polarizer (single transmittance: 42.3%) / protective film).
- a pressure-sensitive adhesive (acrylic pressure-sensitive adhesive) was applied to one surface of an ester resin film (thickness: 38 ⁇ m) having a width of 1200 mm and a length of 43 m so as to have a thickness of 5 ⁇ m.
- ester resin film with pressure-sensitive adhesive through-holes having a diameter of 2.8 mm were formed every 250 mm in the longitudinal direction and every 400 mm in the width direction using a pinnacle blade.
- the above ester resin film with pressure-sensitive adhesive is bonded to the polarizer side of the obtained polarizing plate having a total thickness of 30 ⁇ m by roll-to-roll, and this is immersed in a 1 mol / L (1N) sodium hydroxide aqueous solution for 30 seconds. Then, it was immersed in 1 mol / L (1N) hydrochloric acid for 10 seconds. Then, it dried at 60 degreeC and formed the transparent part in the polarizer.
- Example 2 A PVA film having a thickness of 60 ⁇ m (PE6000, manufactured by Kuraray Co., Ltd.) was immersed in a 30 ° C. aqueous solution for 30 seconds (swelling step). Next, the PVA film was immersed in a dyeing bath having a liquid temperature of 30 ° C. while adjusting the iodine concentration and the immersion time so that the obtained polarizing plate had a predetermined transmittance. In this example, 0.15 parts by weight of iodine and 100 parts by weight of potassium iodide were mixed for 60 seconds with 100 parts by weight of water (dyeing treatment). .
- the PVA film was immersed in a cleaning bath (an aqueous solution obtained by adding 4 parts by weight of potassium iodide to 100 parts by weight of water) at a liquid temperature of 30 ° C. (cleaning treatment).
- a PVA-based resin aqueous solution manufactured by Nippon Gosei Kagaku Kogyo Co., Ltd., trade name “GOHSEIMER (registered trademark) Z-200”, resin concentration: 3% by weight
- GOHSEIMER registered trademark
- a film made by Konica Minolta, trade name “KC4UY”, thickness 40 ⁇ m is bonded, and this is heated in an oven maintained at 60 ° C. for 5 minutes to have a 22 ⁇ m-thick polarizer (single transmittance 42.5%) And the polarizing plate of width 1200mm and length 43m was produced.
- the pressure-sensitive adhesive ester resin film with through-holes formed thereon is bonded to the polarizer surface of the obtained polarizing plate by roll-to-roll, and this is immersed in a 1 mol / L (1N) sodium hydroxide aqueous solution for 180 seconds. Then, it was immersed in 1 mol / L (1N) hydrochloric acid for 60 seconds. Then, it dried at 60 degreeC and formed the transparent part in the polarizer.
- Ts Transmittance
- the measurement was performed using a spectrophotometer (product name “DOT-3” manufactured by Murakami Color Research Laboratory Co., Ltd.).
- the transmittance (T) is a Y value obtained by correcting the visibility with a 2-degree field of view (C light source) of JlS Z 8701-1982.
- Iodine content The iodine content in the transparent part of the polarizer was determined by fluorescent X-ray analysis. Specifically, the iodine content of the polarizer was determined from an X-ray intensity measured under the following conditions, using a calibration curve prepared in advance using a standard sample.
- the transparent parts of the polarizing plates obtained in Examples 1 and 2 have a transmittance of 90.3% (Example 1) and 90.2% (Example 2), respectively, and an iodine content of 0.08% by weight. (Example 1) and 0.12% by weight (Example 2).
- the iodine content of the part other than the transparent part of the polarizer is about 5% by weight, and in any of Examples 1 and 2, the content of the dichroic substance is lower than the other part and functions as a non-polarizing part.
- the transparent part to be obtained was formed.
- the sodium content in the transparent part of the polarizer was determined by fluorescent X-ray analysis. Specifically, the sodium content of the polarizer was determined from an X-ray intensity measured under the following conditions, using a calibration curve prepared in advance using a standard sample. The sodium content was measured before and after immersion in hydrochloric acid.
- ⁇ Analyzer X-ray fluorescence analyzer (XRF) manufactured by Rigaku Denki Kogyo Co., Ltd.
- the sodium content of the transparent part was 4.0% by weight before immersion in hydrochloric acid and 0.04% by weight after immersion.
- the sodium content of the transparent part was 4.1% by weight before immersion in hydrochloric acid and 0.05% by weight after immersion.
- Example 1 the surface smoothness in the vicinity of the transparent portion was measured using an optical measuring instrument “ZYGO New View 7300” manufactured by Canon Inc.
- the evaluation result of the surface smoothness (size of unevenness) of Example 1 is shown in FIG. 8 (a)
- the evaluation result of the surface smoothness of Example 2 is shown in FIG. 8 (b).
- Example 1 where the thickness of the polarizer is 5 ⁇ m
- the level difference between the transparent portion (concave portion) and the other part is 0.8 ⁇ m or less, and is significantly smaller than Example 2 where the thickness of the polarizer is 22 ⁇ m.
- the surface smoothness was remarkably good.
- the polarizer of the present invention is suitably used for a mobile phone such as a smartphone, an image display device with a camera (liquid crystal display device, organic EL device) such as a notebook PC or tablet PC.
- a mobile phone such as a smartphone
- an image display device with a camera liquid crystal display device, organic EL device
- a notebook PC or tablet PC such as a notebook PC or tablet PC.
- Non-polarizing part 20 Resin film 100 Polarizer 101 Polarizer 110 Protective film 120 Protective film 130 Adhesive layer 132 Separator 300 Polarizing plate
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
Abstract
Description
1つの実施形態においては、上記非偏光部は該樹脂フィルムの一方の面側の表面が凹んだ凹部を有し、該凹部の深さは2μm以下である。
1つの実施形態においては、上記偏光子は厚みが10μm以下である。
1つの実施形態においては、上記非偏光部は、上記樹脂フィルムの他の部分よりも上記二色性物質の含有量が低い低濃度部である。1つの実施形態においては、上記非偏光部の二色性物質含有量は1.0重量%以下である。
1つの実施形態においては、上記非偏光部の二色性物質含有量は1.0重量%以下であり、かつ、上記凹部の深さは2μm以下である。
1つの実施形態においては、上記非偏光部のアルカリ金属および/またはアルカリ土類金属の含有量は3.6重量%以下である。
1つの実施形態においては、上記非偏光部の透過率は50%以上である。
1つの実施形態においては、上記非偏光部の透過率は90%以上であり、かつ、上記凹部の深さは2μm以下である。
1つの実施形態においては、上記樹脂フィルムは、ヨウ素を含有するポリビニルアルコール系樹脂フィルムである。
本発明の別の局面によれば、偏光板が提供される。この偏光板は、上記の偏光子と該偏光子の少なくとも一方の側に配置された保護フィルムとを有する。
本発明のさらに別の局面によれば、画像表示装置が提供される。この画像表示装置は、上記の偏光子または上記の偏光板を備え、該偏光子の上記非偏光部がカメラ部に対応する位置に配置されている。
A-1.偏光子の全体構成
図1は、本発明の1つの実施形態による偏光子の概略平面図であり、図2は、図1の偏光子の概略断面図である。なお、図1と図2とでは、それぞれの縮尺および比率が異なっている。偏光子100は、樹脂フィルム10で構成され、所定の位置に非偏光部20を有する。樹脂フィルム10は二色性物質を含む。本発明の実施形態においては、非偏光部20は、樹脂フィルムの他の部位よりも薄い薄肉部とされている。代表的には、非偏光部20は、樹脂フィルム10の一方の面側の表面が凹んだ凹部22を有する。凹部22の深さは2μm以下である。
樹脂フィルム10としては、偏光子として用いられ得る任意の適切な樹脂フィルムを採用することができる。樹脂フィルム10は、代表的には、ポリビニルアルコール系樹脂(以下、「PVA系樹脂」と称する)フィルムである。
上記のとおり、非偏光部20は他の部位よりも薄い薄肉部とされている。代表的には、非偏光部20は、樹脂フィルム10の一方の面側の表面が凹んだ凹部22を有する。この場合、非偏光部と他の部位との段差(凹部の深さ)は、例えば0.02μm以上である。一方で、段差は、好ましくは2μm以下、さらに好ましくは1μm以下である。後述する脱色により非偏光部を形成する場合にはこのような段差が形成される場合があるところ、段差の上限がこのような範囲であれば外観に対する影響が良好に抑制される。なお、本明細書において「段差(凹部の深さ)」は、凹部の最も深い部分の深さをいう。
偏光子100は、実用的には偏光板として提供され得る。したがって、本発明はまた、偏光板を提供し得る。図5は、本発明の1つの実施形態による偏光板の概略断面図である。なお、図5においては、凹部22は省略されている。偏光板300は、偏光子100と偏光子100の両側に配置された保護フィルム110、120とを有する。図示例では、偏光子の両側に保護フィルムが配置されているが、片側にのみ保護フィルムが配置されていてもよい。保護フィルムの形成材料としては、例えば、ジアセチルセルロース、トリアセチルセルロース等のセルロース系樹脂、(メタ)アクリル系樹脂、シクロオレフィン系樹脂、ポリプロピレン等のオレフィン系樹脂、ポリエチレンテレフタレート系樹脂等のエステル系樹脂、ポリアミド系樹脂、ポリカーボネート系樹脂、これらの共重合体樹脂等が挙げられる。目的や所望の構成に応じて、保護フィルム110、120の一方は省略してもよい。本明細書において単に保護フィルムというときは、保護フィルム110、120のような偏光子保護フィルムを意味し、C項で説明する表面保護フィルム(作業時に偏光板を一時的に保護するフィルム)とは異なるものである。なお、図示例では、枚葉状の偏光子100を含む偏光板(すなわち、枚葉状の偏光板)を説明しているが、偏光板は、枚葉状であってもよく長尺状であってもよい。長尺状の偏光板は、長尺状の偏光子と長尺状の保護フィルムとを例えばロールトゥロールにより積層することにより得られ得る。枚葉状の偏光板は、枚葉状の偏光子に枚葉状の保護フィルムを積層してもよく、長尺状の偏光板から所定サイズに裁断してもよい。
以下、本発明の偏光子の製造方法について説明する。便宜上、長尺状の偏光子の製造方法について説明する。枚葉状の偏光子は、得られた長尺状の偏光子を所定のサイズに裁断することにより得られ得る。
偏光子を構成する樹脂フィルム(代表的には、PVA系樹脂フィルム)は、単一のフィルムであってもよく、樹脂基材上に形成された樹脂層(代表的には、PVA系樹脂層)であってもよい。PVA系樹脂層は、樹脂基材上にPVA系樹脂を含む塗布液を塗布して形成してもよく、樹脂基材上にPVA系樹脂フィルムを積層して形成してもよい。以下、偏光子が樹脂基材上に形成されたPVA系樹脂層である場合について具体的に説明する。ここではPVA系樹脂層が塗布形成される場合について説明するが、PVA系樹脂フィルムを積層する場合についても同様である。なお、偏光子が単一のPVA系樹脂フィルムである場合には、偏光子は当業界で周知慣用されている方法により作製され得るので、詳細な説明は省略する。
最初に、樹脂基材上に、PVA系樹脂を含む塗布液を塗布し乾燥することにより、PVA系樹脂層を形成して、樹脂基材/PVA系樹脂層の積層体を作製する。
積層体の延伸方法としては、任意の適切な方法が採用され得る。具体的には、固定端延伸でもよいし、自由端延伸(例えば、周速の異なるロール間に積層体を通して一軸延伸する方法)でもよい。好ましくは、自由端延伸である。
上記染色は、代表的には、PVA系樹脂層に二色性物質(好ましくは、ヨウ素)を吸着させることにより行う。当該吸着方法としては、例えば、ヨウ素を含む染色液にPVA系樹脂層(積層体)を浸漬させる方法、PVA系樹脂層に当該染色液を塗工する方法、当該染色液をPVA系樹脂層に噴霧する方法等が挙げられる。好ましくは、染色液に積層体を浸漬させる方法である。ヨウ素が良好に吸着し得るからである。
上記積層体は、延伸、染色以外に、そのPVA系樹脂層を偏光子(または偏光子中間体)とするための処理が、適宜施され得る。偏光子とするための処理としては、例えば、不溶化処理、架橋処理、洗浄処理、乾燥処理等が挙げられる。なお、これらの処理の回数、順序等は、特に限定されない。
次に、上記C-1項で得られた偏光子中間体の所定の位置に非偏光部を形成し、本発明の偏光子を得る。偏光子(偏光子中間体)が樹脂基材上に塗布されたPVA系樹脂層から形成されたものである場合には、代表的には、樹脂基材/偏光子の積層体または保護フィルム/偏光子の積層体(偏光板)が、非偏光部の形成に供される。偏光子(偏光子中間体)が単一の樹脂フィルムである場合には、代表的には、偏光子単独または保護フィルム/偏光子の積層体(偏光板)が、非偏光部の形成に供される。以下、非偏光部の形成を具体的に説明する。代表例として、保護フィルム/偏光子の積層体(以下、本項において単に偏光板と称する)において化学処理による脱色(以下、化学的脱色処理とも称する)により偏光子(偏光子中間体)に非偏光部を形成する場合を説明する。その他の構成の偏光子中間体(例えば、単一の樹脂フィルムである偏光子中間体)についても同様の手順が適用可能であることは当業者に明らかである。
本発明の画像表示装置は、上記偏光子を備える。偏光子は画像表示装置のサイズに合わせて裁断されたものである。画像表示装置としては、例えば、液晶表示装置、有機ELデバイスが挙げられる。具体的には、液晶表示装置は、液晶セルと、この液晶セルの片側もしくは両側に配置された上記偏光子とを含む液晶パネルを備える。有機ELデバイスは、視認側に上記偏光子が配置された有機ELパネルを備える。偏光子は、非偏光部が画像表示装置のカメラ部に対応するように配置されている。
樹脂基材として、長尺状で、吸水率0.75%、Tg75℃の非晶質のイソフタル酸共重合ポリエチレンテレフタレート(IPA共重合PET)フィルム(厚み:100μm)を用いた。基材の片面に、コロナ処理を施し、このコロナ処理面に、ポリビニルアルコール(重合度4200、ケン化度99.2モル%)およびアセトアセチル変性PVA(重合度1200、アセトアセチル変性度4.6%、ケン化度99.0モル%以上、日本合成化学工業社製、商品名「ゴーセファイマーZ200」)を9:1の比で含む水溶液を25℃で塗布および乾燥して、厚み11μmのPVA系樹脂層を形成し、積層体を作製した。
得られた積層体を、120℃のオーブン内で周速の異なるロール間で縦方向(長手方向)に2.0倍に自由端一軸延伸した(空中補助延伸)。
次いで、積層体を、液温30℃の不溶化浴(水100重量部に対して、ホウ酸を4重量部配合して得られたホウ酸水溶液)に30秒間浸漬させた(不溶化処理)。
次いで、液温30℃の染色浴に、偏光板が所定の透過率となるようにヨウ素濃度、浸漬時間を調整しながら浸漬させた。本実施例では、水100重量部に対して、ヨウ素を0.2重量部配合し、ヨウ化カリウムを1.5重量部配合して得られたヨウ素水溶液に60秒間浸漬させた(染色処理)。
次いで、液温30℃の架橋浴(水100重量部に対して、ヨウ化カリウムを3重量部配合し、ホウ酸を3重量部配合して得られたホウ酸水溶液)に30秒間浸漬させた(架橋処理)。
その後、積層体を、液温70℃のホウ酸水溶液(水100重量部に対して、ホウ酸を4重量部配合し、ヨウ化カリウムを5重量部配合して得られた水溶液)に浸漬させながら、周速の異なるロール間で縦方向(長手方向)に総延伸倍率が5.5倍となるように一軸延伸を行った(水中延伸)。
その後、積層体を液温30℃の洗浄浴(水100重量部に対して、ヨウ化カリウムを4重量部配合して得られた水溶液)に浸漬させた(洗浄処理)。
続いて、積層体のPVA系樹脂層表面に、PVA系樹脂水溶液(日本合成化学工業社製、商品名「ゴーセファイマー(登録商標)Z-200」、樹脂濃度:3重量%)を塗布して保護フィルム(厚み25μm)を貼り合わせ、これを60℃に維持したオーブンで5分間加熱した。その後、基材をPVA系樹脂層から剥離し、幅1200mm、長さ43mの長尺状の偏光板(厚み5μmの偏光子(単体透過率42.3%)/保護フィルム)を得た。
厚み60μmのPVAフィルム(クラレ社製、PE6000)を、30℃の水溶液に30秒浸漬させた(膨潤工程)。
次いで、PVAフィルムを、液温30℃の染色浴に、得られる偏光板が所定の透過率となるようにヨウ素濃度、浸漬時間を調整しながら浸漬させた。本実施例では、水100重量部に対して、ヨウ素を0.15重量部配合し、ヨウ化カリウムを1.0重量部配合して得られたヨウ素水溶液に60秒間浸漬させた(染色処理)。
次いで、液温30℃の架橋浴(水100重量部に対して、ヨウ化カリウムを3重量部配合し、ホウ酸を3重量部配合して得られたホウ酸水溶液)に30秒間浸漬させた(架橋処理)。
その後、PVAフィルムを、液温70℃のホウ酸水溶液(水100重量部に対して、ホウ酸を4重量部配合し、ヨウ化カリウムを5重量部配合して得られた水溶液)に浸漬させながら、周速の異なるロール間で縦方向(長手方向)に5.5倍に一軸延伸を行った(水中延伸)。
その後、PVAフィルムを液温30℃の洗浄浴(水100重量部に対して、ヨウ化カリウムを4重量部配合して得られた水溶液)に浸漬させた(洗浄処理)。
洗浄後、PVAフィルムの片面に、PVA系樹脂水溶液(日本合成化学工業社製、商品名「ゴーセファイマー(登録商標)Z-200」、樹脂濃度:3重量%)を塗布し、トリアセチルセルロースフィルム(コニカミノルタ社製、商品名「KC4UY」、厚み40μm)を貼り合わせ、これを60℃に維持したオーブンで5分間加熱し、厚み22μmの偏光子(単体透過率42.5%)を有し、幅1200mm、長さ43mの偏光板を作製した。
1.透過率(Ts)
分光光度計(村上色彩技術研究所(株)製 製品名「DOT-3」)を用いて測定した。透過率(T)は、JlS Z 8701-1982の2度視野(C光源)により、視感度補正を行ったY値である。
2.ヨウ素含有量
蛍光X線分析により、偏光子の透明部におけるヨウ素含有量を求めた。具体的には、下記条件により測定したX線強度から、あらかじめ標準試料を用いて作成した検量線により、偏光子のヨウ素含有量を求めた。
・分析装置:理学電機工業製 蛍光X線分析装置(XRF) 製品名「ZSX100e」
・対陰極:ロジウム
・分光結晶:フッ化リチウム
・励起光エネルギー:40kV-90mA
・ヨウ素測定線:I-LA
・定量法:FP法
・2θ角ピーク:103.078deg(ヨウ素)
・測定時間:40秒
蛍光X線分析により、偏光子の透明部におけるナトリウム含有量を求めた。具体的には、下記条件により測定したX線強度から、あらかじめ標準試料を用いて作成した検量線により、偏光子のナトリウム含有量を求めた。ナトリウム含有量の測定は、塩酸への浸漬前、および、浸漬後に行った。
・分析装置:理学電機工業製 蛍光X線分析装置(XRF) 製品名「ZSX100e」
・対陰極:ロジウム
・分光結晶:フッ化リチウム
・励起光エネルギー:40kV-90mA
・ナトリウム測定線:Na-KA
・定量法:FP法
・測定時間:40秒
実施例1および2の偏光板について目視により外観を確認したところ、実施例2の偏光板において透明部の凹みが視認された。
20 樹脂フィルム
100 偏光子
101 偏光子
110 保護フィルム
120 保護フィルム
130 粘着剤層
132 セパレーター
300 偏光板
Claims (12)
- 二色性物質を含む樹脂フィルムで構成され、
所定の位置に非偏光部を有し、
該非偏光部が該樹脂フィルムの他の部位よりも薄い薄肉部とされている、
偏光子。 - 前記非偏光部が前記樹脂フィルムの一方の面側の表面が凹んだ凹部を有し、該凹部の深さが2μm以下である、請求項1に記載の偏光子。
- 厚みが10μm以下である、請求項1または2に記載の偏光子。
- 前記非偏光部が、前記樹脂フィルムの他の部分よりも前記二色性物質の含有量が低い低濃度部である、請求項1から3のいずれかに記載の偏光子。
- 前記非偏光部の二色性物質含有量が1.0重量%以下である、請求項4に記載の偏光子。
- 前記非偏光部の二色性物質含有量が1.0重量%以下であり、かつ、前記凹部の深さが2μm以下である、請求項2から5のいずれかに記載の偏光子。
- 前記非偏光部のアルカリ金属および/またはアルカリ土類金属の含有量が3.6重量%以下である、請求項1から6のいずれかに記載の偏光子。
- 前記非偏光部の透過率が50%以上である、請求項1から7のいずれかに記載の偏光子。
- 前記非偏光部の透過率が90%以上であり、かつ、前記凹部の深さが2μm以下である、請求項2から8のいずれかに記載の偏光子。
- 前記樹脂フィルムが、ヨウ素を含有するポリビニルアルコール系樹脂フィルムである、請求項1から9のいずれかに記載の偏光子。
- 請求項1から10のいずれかに記載の偏光子と該偏光子の少なくとも一方の側に配置された保護フィルムとを有する、偏光板。
- 請求項1から10のいずれかに記載の偏光子または請求項11に記載の偏光板を備え、前記非偏光部がカメラ部に対応する位置に配置されている、画像表示装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020177036921A KR102086899B1 (ko) | 2015-06-25 | 2016-06-20 | 편광자 |
CN201680037352.1A CN107710039B (zh) | 2015-06-25 | 2016-06-20 | 偏振片 |
US15/735,264 US10503004B2 (en) | 2015-06-25 | 2016-06-20 | Polarizer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015-127755 | 2015-06-25 | ||
JP2015127755A JP6872309B2 (ja) | 2015-06-25 | 2015-06-25 | 偏光子 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016208535A1 true WO2016208535A1 (ja) | 2016-12-29 |
Family
ID=57585725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2016/068248 WO2016208535A1 (ja) | 2015-06-25 | 2016-06-20 | 偏光子 |
Country Status (6)
Country | Link |
---|---|
US (1) | US10503004B2 (ja) |
JP (1) | JP6872309B2 (ja) |
KR (1) | KR102086899B1 (ja) |
CN (2) | CN107710039B (ja) |
TW (1) | TWI703355B (ja) |
WO (1) | WO2016208535A1 (ja) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6215261B2 (ja) * | 2014-06-27 | 2017-10-18 | 日東電工株式会社 | 長尺状の偏光子、長尺状の偏光板および画像表示装置 |
JP7163000B2 (ja) | 2015-06-25 | 2022-10-31 | 日東電工株式会社 | 非偏光部を有する偏光子 |
KR20180081197A (ko) * | 2017-01-05 | 2018-07-16 | 삼성디스플레이 주식회사 | 편광판 제조방법 및 편광판을 구비하는 표시장치 |
JP2018155795A (ja) * | 2017-03-15 | 2018-10-04 | Jxtgエネルギー株式会社 | 光学位相差部材、偏光変換素子、テンプレート及び光学位相差部材の製造方法 |
KR102391396B1 (ko) * | 2017-09-28 | 2022-04-26 | 엘지디스플레이 주식회사 | 플렉서블 표시장치용 편광판 및 이를 포함하는 플렉서블 표시장치 |
JP7191578B2 (ja) * | 2018-08-01 | 2022-12-19 | 日東電工株式会社 | 偏光子、偏光板、および、画像表示装置 |
JP7046901B2 (ja) * | 2018-12-25 | 2022-04-04 | 日東電工株式会社 | 偏光子、および、その製造方法 |
US20220146731A1 (en) * | 2019-03-29 | 2022-05-12 | Nitto Denko Corporation | Optical film |
CN110187427B (zh) * | 2019-06-24 | 2021-06-01 | 昆山工研院新型平板显示技术中心有限公司 | 一种偏光片、电子设备及偏光片的制备方法 |
JP7408346B2 (ja) * | 2019-10-25 | 2024-01-05 | 住友化学株式会社 | 光学積層体 |
CN110727142B (zh) * | 2019-10-29 | 2023-04-28 | Oppo广东移动通信有限公司 | 偏光片、显示屏以及电子设备 |
KR20210082316A (ko) | 2019-12-24 | 2021-07-05 | 삼성디스플레이 주식회사 | 표시 패널 및 이를 구비하는 표시 장치 |
KR20210154316A (ko) * | 2020-06-11 | 2021-12-21 | 삼성디스플레이 주식회사 | 전자 장치 및 그 전자 장치의 제조 방법 |
KR20220156136A (ko) * | 2021-05-17 | 2022-11-25 | 삼성디스플레이 주식회사 | 발광 표시 장치 및 그 제조 방법 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4864941A (ja) * | 1971-12-09 | 1973-09-07 | ||
JPS58168019A (ja) * | 1982-03-29 | 1983-10-04 | Nitto Electric Ind Co Ltd | 部分カラ−偏光フイルムの製法 |
JP2012137738A (ja) * | 2010-10-29 | 2012-07-19 | Apple Inc | 偏光窓及び不透明マスク層を有する電子デバイスのディスプレイ |
JP2014081482A (ja) * | 2012-10-16 | 2014-05-08 | Nitto Denko Corp | 偏光子および画像表示装置 |
KR20150111878A (ko) * | 2014-03-26 | 2015-10-06 | 주식회사 엘지화학 | 국지적 탈색 영역을 포함하는 편광 부재의 제조 방법, 편광 부재 롤의 제조 방법 및 매엽형 편광 부재의 제조 방법 |
JP2016525725A (ja) * | 2014-01-17 | 2016-08-25 | エルジー・ケム・リミテッド | 局地的に偏光解消領域を有する偏光子の製造方法、これを用いて製造された偏光子および偏光板 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5327285A (en) * | 1990-06-11 | 1994-07-05 | Faris Sadeg M | Methods for manufacturing micropolarizers |
US20040212555A1 (en) | 2003-04-23 | 2004-10-28 | Falco Mark A. | Portable electronic device with integrated display and camera and method therefore |
JP4646951B2 (ja) | 2007-06-06 | 2011-03-09 | 株式会社半導体エネルギー研究所 | センサ付き表示装置 |
JP5147014B2 (ja) | 2008-10-08 | 2013-02-20 | 住友化学株式会社 | 高コントラスト偏光板および液晶表示装置 |
KR20100125537A (ko) * | 2009-05-21 | 2010-12-01 | 동우 화인켐 주식회사 | 편광격자 스크린의 제조방법, 편광격자 스크린 및 이것이 구비된 3차원 화상표시장치 |
WO2011043023A1 (ja) | 2009-10-06 | 2011-04-14 | ソニー株式会社 | 光学ユニットおよび撮像装置 |
JP5434457B2 (ja) | 2009-10-09 | 2014-03-05 | ソニー株式会社 | 光学ユニットおよび撮像装置 |
KR101293210B1 (ko) | 2010-12-15 | 2013-08-05 | 주식회사 엘지화학 | 디스플레이 기기용 편광판의 구멍 형성 장치 및 방법 |
KR101495759B1 (ko) | 2011-04-18 | 2015-02-26 | 주식회사 엘지화학 | 디스플레이 장치용 편광판, 이를 이용한 액정 패널 및 디스플레이 장치 |
US9075199B2 (en) | 2012-10-30 | 2015-07-07 | Apple Inc. | Displays with polarizer layers for electronic devices |
KR20150037550A (ko) * | 2013-09-30 | 2015-04-08 | 주식회사 엘지화학 | 국지적으로 편광 해소 영역을 갖는 편광판 및 그 제조 방법 |
WO2015108261A1 (ko) * | 2014-01-17 | 2015-07-23 | 주식회사 엘지화학 | 국지적으로 편광 해소 영역을 갖는 편광자 제조 방법, 이를 이용하여 제조된 편광자 및 편광판 |
KR102426386B1 (ko) * | 2014-04-18 | 2022-07-27 | 스미또모 가가꾸 가부시키가이샤 | 패턴 편광 필름 및 그의 제조 방법 |
TWI673514B (zh) * | 2014-06-30 | 2019-10-01 | Lg 化學股份有限公司 | 具有局部去偏光區域的偏光板之製備方法與其所製備之偏光板 |
-
2015
- 2015-06-25 JP JP2015127755A patent/JP6872309B2/ja active Active
-
2016
- 2016-06-20 CN CN201680037352.1A patent/CN107710039B/zh active Active
- 2016-06-20 US US15/735,264 patent/US10503004B2/en active Active
- 2016-06-20 KR KR1020177036921A patent/KR102086899B1/ko active IP Right Grant
- 2016-06-20 WO PCT/JP2016/068248 patent/WO2016208535A1/ja active Application Filing
- 2016-06-20 CN CN202010514890.3A patent/CN111596401A/zh active Pending
- 2016-06-24 TW TW105119992A patent/TWI703355B/zh active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4864941A (ja) * | 1971-12-09 | 1973-09-07 | ||
JPS58168019A (ja) * | 1982-03-29 | 1983-10-04 | Nitto Electric Ind Co Ltd | 部分カラ−偏光フイルムの製法 |
JP2012137738A (ja) * | 2010-10-29 | 2012-07-19 | Apple Inc | 偏光窓及び不透明マスク層を有する電子デバイスのディスプレイ |
JP2014081482A (ja) * | 2012-10-16 | 2014-05-08 | Nitto Denko Corp | 偏光子および画像表示装置 |
JP2016525725A (ja) * | 2014-01-17 | 2016-08-25 | エルジー・ケム・リミテッド | 局地的に偏光解消領域を有する偏光子の製造方法、これを用いて製造された偏光子および偏光板 |
KR20150111878A (ko) * | 2014-03-26 | 2015-10-06 | 주식회사 엘지화학 | 국지적 탈색 영역을 포함하는 편광 부재의 제조 방법, 편광 부재 롤의 제조 방법 및 매엽형 편광 부재의 제조 방법 |
Also Published As
Publication number | Publication date |
---|---|
US20180173050A1 (en) | 2018-06-21 |
CN107710039B (zh) | 2020-07-03 |
TW201706640A (zh) | 2017-02-16 |
CN107710039A (zh) | 2018-02-16 |
TWI703355B (zh) | 2020-09-01 |
KR102086899B1 (ko) | 2020-03-09 |
CN111596401A (zh) | 2020-08-28 |
KR20180011239A (ko) | 2018-01-31 |
JP6872309B2 (ja) | 2021-05-19 |
US10503004B2 (en) | 2019-12-10 |
JP2017009908A (ja) | 2017-01-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6215262B2 (ja) | 長尺状の偏光子の製造方法 | |
JP6215261B2 (ja) | 長尺状の偏光子、長尺状の偏光板および画像表示装置 | |
WO2016208535A1 (ja) | 偏光子 | |
JP6713189B2 (ja) | 長尺状の偏光フィルム積層体 | |
TWI694917B (zh) | 偏光件之製造方法 | |
JP2021144223A (ja) | 偏光板およびその製造方法、ならびに該偏光板を用いた画像表示装置 | |
JP7369237B2 (ja) | 偏光板の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16814305 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15735264 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 20177036921 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 16814305 Country of ref document: EP Kind code of ref document: A1 |