CN116973995B - Optical film, polaroid and display device - Google Patents
Optical film, polaroid and display device Download PDFInfo
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- CN116973995B CN116973995B CN202311236429.6A CN202311236429A CN116973995B CN 116973995 B CN116973995 B CN 116973995B CN 202311236429 A CN202311236429 A CN 202311236429A CN 116973995 B CN116973995 B CN 116973995B
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- 239000012788 optical film Substances 0.000 title claims abstract description 236
- 239000002245 particle Substances 0.000 claims abstract description 1071
- 239000000758 substrate Substances 0.000 claims abstract description 37
- 230000003750 conditioning effect Effects 0.000 claims description 102
- 230000007423 decrease Effects 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 29
- 238000009792 diffusion process Methods 0.000 claims description 8
- 229920000728 polyester Polymers 0.000 claims description 8
- 229920002301 cellulose acetate Polymers 0.000 claims description 7
- 150000001242 acetic acid derivatives Chemical class 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 24
- 230000001105 regulatory effect Effects 0.000 abstract description 23
- 239000010410 layer Substances 0.000 description 29
- 230000003287 optical effect Effects 0.000 description 28
- -1 aluminate esters Chemical class 0.000 description 24
- 230000003247 decreasing effect Effects 0.000 description 17
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 14
- 229920000139 polyethylene terephthalate Polymers 0.000 description 14
- 239000005020 polyethylene terephthalate Substances 0.000 description 14
- 239000012790 adhesive layer Substances 0.000 description 12
- 239000004094 surface-active agent Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 238000007873 sieving Methods 0.000 description 9
- 229910000019 calcium carbonate Inorganic materials 0.000 description 7
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 6
- 239000002346 layers by function Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 239000011241 protective layer Substances 0.000 description 5
- 239000004793 Polystyrene Substances 0.000 description 4
- 125000001153 fluoro group Chemical group F* 0.000 description 4
- 230000001788 irregular Effects 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229920002223 polystyrene Polymers 0.000 description 4
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 3
- 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 class 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 3
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 239000011112 polyethylene naphthalate Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000012798 spherical particle Substances 0.000 description 3
- 125000000446 sulfanediyl group Chemical group *S* 0.000 description 3
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000007822 coupling agent Substances 0.000 description 2
- 238000000386 microscopy Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 229920000193 polymethacrylate Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- YWOTXIYWVFFOPD-UHFFFAOYSA-M sodium 12-fluorododecane-1-sulfonate Chemical compound FCCCCCCCCCCCCS(=O)(=O)[O-].[Na+] YWOTXIYWVFFOPD-UHFFFAOYSA-M 0.000 description 2
- 125000000542 sulfonic acid group Chemical group 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VKOMCYHZNCTOQL-UHFFFAOYSA-N 3-hydroxy-1,2,4,3lambda5,5-trioxaphosphasilolane 3-oxide Chemical class OP1(=O)OO[SiH2]O1 VKOMCYHZNCTOQL-UHFFFAOYSA-N 0.000 description 1
- DZXSOSQSLWSODC-UHFFFAOYSA-N 4,5-dihydro-1h-imidazole;phosphoric acid Chemical class C1CN=CN1.OP(O)(O)=O DZXSOSQSLWSODC-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920000388 Polyphosphate Polymers 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 241000519995 Stachys sylvatica Species 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical class [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 150000008052 alkyl sulfonates Chemical class 0.000 description 1
- OJMOMXZKOWKUTA-UHFFFAOYSA-N aluminum;borate Chemical compound [Al+3].[O-]B([O-])[O-] OJMOMXZKOWKUTA-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000001449 anionic compounds Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 230000003666 anti-fingerprint Effects 0.000 description 1
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 1
- 229910001626 barium chloride Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 150000001767 cationic compounds Chemical class 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 229910001412 inorganic anion Inorganic materials 0.000 description 1
- 229910001411 inorganic cation Inorganic materials 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- QJAOYSPHSNGHNC-UHFFFAOYSA-N octadecane-1-thiol Chemical compound CCCCCCCCCCCCCCCCCCS QJAOYSPHSNGHNC-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- KZCOBXFFBQJQHH-UHFFFAOYSA-N octane-1-thiol Chemical compound CCCCCCCCS KZCOBXFFBQJQHH-UHFFFAOYSA-N 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 1
- DAJSVUQLFFJUSX-UHFFFAOYSA-M sodium;dodecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCS([O-])(=O)=O DAJSVUQLFFJUSX-UHFFFAOYSA-M 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 229910001631 strontium chloride Inorganic materials 0.000 description 1
- AHBGXTDRMVNFER-UHFFFAOYSA-L strontium dichloride Chemical compound [Cl-].[Cl-].[Sr+2] AHBGXTDRMVNFER-UHFFFAOYSA-L 0.000 description 1
- GEKDEMKPCKTKEC-UHFFFAOYSA-N tetradecane-1-thiol Chemical compound CCCCCCCCCCCCCCS GEKDEMKPCKTKEC-UHFFFAOYSA-N 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding 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
-
- 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
Abstract
The embodiment of the invention discloses an optical film, a polaroid and a display device, wherein the optical film comprises a substrate and regulating particles dispersed in the substrate, the regulating particles comprise first-type regulating particles and/or second-type regulating particles, the length-diameter ratio of the first-type regulating particles is greater than or equal to 1 and less than 5, the length-diameter ratio of the second-type regulating particles is greater than or equal to 5 and less than or equal to 50, the particle diameter value of the first-type regulating particles which is greater than or equal to 80% is in the range of 50-140% of the first central particle diameter value, and the particle diameter value of the second-type regulating particles which is greater than or equal to 80% is in the range of 50-140% of the second central particle diameter value; the invention controls the particle size distribution range of the adjusting particles to enable the particle size value of most adjusting particles to be close to the central particle size value, thereby improving the product stability of the optical film and improving the stability of the display device.
Description
Technical Field
The invention relates to the field of display, in particular to an optical film, a polaroid and a display device.
Background
Currently, a polarizing layer is generally provided in a polarizer, and an optical film is used as a protective layer of the polarizing layer, which plays a role in protecting the polarizing layer, and at the same time, adjusting particles are added to the optical film to improve the optical performance (e.g., increase viewing angle, etc.) of the optical film. However, the particle size distribution of the adjustment particles added to the optical film is wide, and it is difficult to maintain the quality of the optical film and the optical effect stable, and there is a problem that it is difficult to maintain the quality of the optical film-equipped display device.
Therefore, an optical film, a polarizer and a display device are needed to solve the above technical problems.
Disclosure of Invention
The invention provides an optical film, a polaroid and a display device, which can solve the technical problem that the product quality of the display device is difficult to stabilize due to the optical film at present.
The present invention provides an optical film comprising:
a substrate;
adjusting particles dispersed within the substrate;
wherein the conditioning particles comprise a first type of conditioning particles and/or a second type of conditioning particles;
the first type of adjustment particles are provided with a plurality of first cross sections, each first cross section is provided with a first circumscribing circle, the ratio of the length of the long axis of the first type of adjustment particles to the first circumscribing circle with the largest diameter among the plurality of first circumscribing circles is larger than or equal to 1, and the ratio of the length of the long axis of the first type of adjustment particles to the diameter of the first circumscribing circle with the largest diameter among the plurality of first circumscribing circles is smaller than 5;
the second type of adjusting particles are provided with a plurality of second cross sections, each second cross section is provided with a second circumscribing circle, the ratio of the length of the long axis of the second type of adjusting particles to the diameter of the second circumscribing circle with the largest diameter among the plurality of second circumscribing circles is more than or equal to 5, and the ratio of the length of the long axis of the second type of adjusting particles to the diameter of the second circumscribing circle with the largest diameter among the plurality of second circumscribing circles is less than or equal to 50;
Each first type of adjusting particle has a first particle size value, the first particle size values of all the first types of adjusting particles are distributed in a range, all the first types of adjusting particles correspond to a first central particle size value, and more than or equal to 80% of the first particle size values of the first types of adjusting particles are located in 50-140% of the first central particle size value range;
each second-type adjusting particle has a second particle size value, the second particle size values of all the second-type adjusting particles are distributed in a range, all the second-type adjusting particles correspond to a second central particle size value, and more than or equal to 80% of the second particle size values of the second-type adjusting particles are located in 50-140% of the second central particle size value range.
Preferably, of all the first type of conditioning particles, greater than or equal to 80% of the first type of conditioning particles have a first particle size value within 70% to 110% of the first central particle size value range; and/or the number of the groups of groups,
of all the second-type adjustment particles, greater than or equal to 80% of the second-type adjustment particles have a second particle diameter value in the range of 70% to 110% of the second center particle diameter value.
Preferably, the optical film has an in-plane retardation value, the in-plane retardation value of the optical film being less than 3000 nanometers.
Preferably, the optical film has a thickness direction retardation value, a ratio of an in-plane retardation value of the optical film to the thickness direction retardation value of the optical film is greater than 0.1, and a ratio of the in-plane retardation value of the optical film to the thickness direction retardation value of the optical film is less than 2.
Preferably, the first type of adjustment particles are at least one of first sub-type adjustment particles, second sub-type adjustment particles, third sub-type adjustment particles, fourth sub-type adjustment particles and fifth sub-type adjustment particles which are different from each other in shape, and the second type of adjustment particles are at least one of sixth sub-type adjustment particles, seventh sub-type adjustment particles, eighth sub-type adjustment particles, ninth sub-type adjustment particles and tenth sub-type adjustment particles which are different from each other in shape;
wherein a variation value of a diameter of a first circumscribed circle of the first cross section of the first sub-class of adjustment particles is less than or equal to 0.3 micrometers along an extension direction of a long axis of the first sub-class of adjustment particles;
the first end of the second sub-class adjusting particle is connected with the second end of the second sub-class adjusting particle, the diameter of a first circumcircle of the first section positioned at the first end of the second sub-class adjusting particle gradually decreases along the direction away from the second end of the second sub-class adjusting particle, and the diameter of a first circumcircle of the first section positioned at the second end of the second sub-class adjusting particle gradually decreases along the direction away from the first end of the second sub-class adjusting particle;
A variation value of a diameter of a first circumcircle of the first section located at a middle portion of the third sub-class adjustment particle is less than or equal to 1 micron along an extending direction of a long axis of the third sub-class adjustment particle, and a variation value of a diameter of a first circumcircle of the first section located at a first end portion of the third sub-class adjustment particle is less than or equal to 1 micron along a direction away from the middle portion of the third sub-class adjustment particle;
a variation value of a diameter of a first circumscribed circle of the first section located at a middle portion of the fourth sub-class adjustment particle is less than or equal to 1 micrometer along an extending direction of a long axis of the fourth sub-class adjustment particle, a diameter of a first circumscribed circle of the first section located at a first end portion of the fourth sub-class adjustment particle is gradually reduced, and a diameter of a first circumscribed circle of the first section located at a second end portion of the fourth sub-class adjustment particle is gradually reduced along a direction away from the middle portion of the fourth sub-class adjustment particle;
the first end of the fifth sub-class adjusting particle is connected with the second end of the fifth sub-class adjusting particle, and the diameter of a first circumcircle of the first section of the fifth sub-class adjusting particle gradually decreases along the direction from the first end of the fifth sub-class adjusting particle to the second end of the fifth sub-class adjusting particle;
A variation value of a diameter of a second circumscribed circle of the second section of the sixth sub-class adjustment particle is less than or equal to 0.3 micrometers along an extension direction of a long axis of the sixth sub-class adjustment particle;
a variation value of a diameter of a second circumscribed circle of the second section located at a middle portion of the seventh sub-class adjustment particle is less than or equal to 1 micrometer along an extending direction of a long axis of the seventh sub-class adjustment particle, and a variation value of a diameter of a second circumscribed circle of the second section located at a first end portion of the seventh sub-class adjustment particle is less than or equal to 1 micrometer along a direction away from the middle portion of the seventh sub-class adjustment particle;
a variation value of a diameter of a second circumscribed circle of the second cross section located at a middle portion of the eighth sub-class adjustment particle is less than or equal to 1 μm along an extending direction of a long axis of the eighth sub-class adjustment particle, and a diameter of a second circumscribed circle of the second cross section located at a first end portion of the eighth sub-class adjustment particle is gradually reduced along a direction away from the middle portion of the eighth sub-class adjustment particle, and a diameter of a second circumscribed circle of the second cross section located at a second end portion of the eighth sub-class adjustment particle is gradually reduced;
The first end of the ninth sub-class adjustment particle is connected with the second end of the ninth sub-class adjustment particle, and the diameter of a second circumcircle positioned on the second section of the ninth sub-class adjustment particle gradually decreases along the direction from the first end of the ninth sub-class adjustment particle to the second end of the ninth sub-class adjustment particle;
the first end of the tenth sub-class adjusting particle is connected with the second end of the tenth sub-class adjusting particle, the diameter of the second circumscribed circle of the second section at the first end of the tenth sub-class adjusting particle is gradually reduced along the direction away from the second end of the tenth sub-class adjusting particle, and the diameter of the second circumscribed circle of the second section at the second end of the tenth sub-class adjusting particle is gradually reduced along the direction away from the first end of the tenth sub-class adjusting particle.
Preferably, the first sub-class adjustment particles are selected from square particles or cuboid particles, the second sub-class adjustment particles are selected from spherical particles or ellipsoidal particles, the third sub-class light diffusion particles are selected from needle-shaped particles with reduced diameters at one end, the fourth sub-class light diffusion particles are selected from needle-shaped particles with reduced diameters at both ends, the fifth sub-class light diffusion particles are selected from long cone-shaped particles, the sixth sub-class adjustment particles are selected from rod-shaped particles, the seventh sub-class adjustment particles are selected from needle-shaped particles with reduced diameters at one end, the eighth sub-class adjustment particles are selected from needle-shaped particles with reduced diameters at both ends, the ninth sub-class adjustment particles are selected from long cone-shaped particles, and the tenth sub-class adjustment particles are selected from double cone-shaped particles or ellipsoidal particles.
Preferably, the first central particle size value is less than 20 microns and the second central particle size value is less than 20 microns.
Preferably, the mass fraction of the conditioning particles in the optical film is less than or equal to 20%.
The invention also provides a polarizer comprising the optical film.
The invention also provides a display device comprising the polaroid.
The invention controls the particle size distribution range of the adjusting particles to enable the particle size value of most adjusting particles to be close to the central particle size value, thereby improving the product stability of the optical film and improving the product quality stability of the display device with the optical film.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a first structure of an optical film according to an embodiment of the present invention;
FIG. 2 is a schematic view of a second structure of an optical film according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a first structure of a polarizer according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a second structure of a polarizer according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a third structure of a polarizer according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a fourth structure of a polarizer according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the invention. In the present invention, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
At present, due to wide particle size distribution, the product stability of an optical film is difficult to improve, and the product quality of a display device with the optical film is difficult to stabilize.
Referring to fig. 1 to 2, an optical film 101 according to an embodiment of the present invention includes:
a base material 1011;
adjustment particles 1012, wherein the adjustment particles 1012 are dispersed in the base material 1011;
wherein the modulating particles 1012 comprise a first type of modulating particles 1012a and/or a second type of modulating particles 1012b;
the first type of adjustment particles 1012a have a plurality of first cross sections, each of the first cross sections has a first circumscribing circle, a ratio of a length of a long axis of the first type of adjustment particles 1012a to a diameter of the first circumscribing circle with a largest diameter among the plurality of first circumscribing circles is greater than or equal to 1, and a ratio of a length of a long axis of the first type of adjustment particles 1012a to a diameter of the first circumscribing circle with a largest diameter among the plurality of first circumscribing circles is less than 5;
the second type of adjustment particles 1012b have a plurality of second cross sections, each of the second cross sections having a second circumscribed circle, a ratio of a length of a long axis of the second type of adjustment particles 1012b to a diameter of the second circumscribed circle having a largest diameter among the plurality of second circumscribed circles is greater than or equal to 5, and a ratio of a length of a long axis of the second type of adjustment particles 1012b to the second circumscribed circle having a largest diameter among the plurality of second circumscribed circles is less than or equal to 50;
Each of the first type of adjustment particles 1012a has a first particle size value, the first particle size values of all of the first type of adjustment particles 1012a are distributed in a range, all of the first type of adjustment particles 1012a correspond to one first center particle size value, and more than or equal to 80% of the first particle size values of the first type of adjustment particles 1012a in all of the first type of adjustment particles 1012a are located within 50% to 140% of the range of the first center particle size values;
each of the second-type adjustment particles 1012b has a second particle size value, the second particle size values of all the second-type adjustment particles 1012b are distributed in a range, one second center particle size value is corresponding to all the second-type adjustment particles 1012b, and more than or equal to 80% of the second particle size values of the second-type adjustment particles 1012b in all the second-type adjustment particles 1012b are located within 50% to 140% of the second center particle size value range.
The embodiment of the invention controls the particle size distribution range of the adjusting particles 1012 added in the base material 1011 of the optical film 101, so that most of the particle size values of the adjusting particles 1012 are close to the central particle size value, thereby improving the product stability of the optical film 101 and improving the product quality stability of the display device with the optical film 101.
The technical scheme of the present invention will now be described with reference to specific embodiments.
In this embodiment, the particle size of the adjustment particles 1012 is the actual particle size of the adjustment particles 1012. The particle size distribution curve of the adjustment particles 1012 can be obtained by performing particle size statistics on the actual particle size values of the adjustment particles 1012 in the optical film 101, and the particle size value of the adjustment particles 1012 corresponding to 50% of the volume distribution in the particle size distribution curve is the center particle size value of the adjustment particles 1012. When the adjustment particles 1012 have different types of adjustment particles 1012 having a large difference in the ratio of the length of the long axis to the diameter, the different types of adjustment particles 1012 are counted separately. Specifically, the ratio of the length of the long axis of the first type of adjustment particles 1012a to the diameter of the first type of adjustment particles 1012a is greater than or equal to 1, the ratio of the length of the long axis of the first type of adjustment particles 1012a to the diameter of the first type of adjustment particles 1012a is less than 5, each first type of adjustment particles 1012a has a first particle size value, all the first particle size values of the first type of adjustment particles 1012a are distributed in a range, all the first type of adjustment particles 1012a correspond to one first central particle size value, the first particle size value of each first type of adjustment particles 1012a is the same as the length of the long axis of each first type of adjustment particles 1012a, and more than or equal to 80% of the first particle size values of the first type of adjustment particles 1012a are within 50% to 140% of the range of the first central particle size values; the ratio of the length of the long axis of the second-type adjustment particles 1012b to the diameter of the second-type adjustment particles 1012b is greater than or equal to 5, the ratio of the length of the long axis of the second-type adjustment particles 1012b to the diameter of the second-type adjustment particles 1012b is less than or equal to 50, each second-type adjustment particle 1012b has a second particle size value, the second particle size values of all the second-type adjustment particles 1012b are distributed in a range, the second particle size value of each second-type adjustment particle 1012b is the same as the length of the long axis of each second-type adjustment particle 1012b, all the second-type adjustment particles 1012b correspond to one second center particle size value, and more than or equal to 80% of the second particle size values of the second-type adjustment particles 1012b are within 50% to 140% of the range of the second center particle size values.
In some embodiments, the particle size distribution of the conditioning particles 1012 may be obtained by sieving. Specifically, the adjusting particles 1012 are placed on a screen surface with fixed-aperture screen holes, the particle size value of the adjusting particles 1012 passing through the screen holes is smaller than the aperture of the screen holes, and the particle size value of the adjusting particles 1012 trapped on the screen surface is larger than the aperture of the screen holes. The particle size distribution of the conditioning particles 1012 can be obtained by repeatedly sieving and replacing the screening surface with screening holes of different apertures. When the adjustment particles 1012 include the first type adjustment particles 1012a and the second type adjustment particles 1012b, the particle size difference between the first type adjustment particles 1012a and the second type adjustment particles 1012b may be used to distinguish the first type adjustment particles 1012a from the second type adjustment particles 1012b, and then the first type adjustment particles 1012a and the second type adjustment particles 1012b are repeatedly sieved, so as to obtain the particle size distribution of the first type adjustment particles 1012a and the second type adjustment particles 1012 b.
In some embodiments, the particle size distribution of the conditioning particles 1012 can be obtained by measurement using a topography picture of the conditioning particles 1012 as measured by an optical microscope or an electron microscope. Specifically, an electron microscope (e.g., scanning electron microscope) image of the result of the electron microscope having a plurality of the adjustment particles 1012 may be obtained, and the particle size distribution of the adjustment particles 1012 may be obtained by measuring the particle size values of the plurality of adjustment particles 1012 using a specialized particle size measuring software (e.g., nano Measurer, etc.). When the adjustment particles 1012 include the first type adjustment particles 1012a and the second type adjustment particles 1012b, the particle size distribution of the first type adjustment particles 1012a and the particle size distribution of the second type adjustment particles 1012b can be obtained simultaneously by an optical microscope or an electron microscope, and it is not necessary to separate the first type adjustment particles 1012a and the second type adjustment particles 1012b as in the sieving method, and then separate sieving is performed to obtain the respective particle size distributions.
In some embodiments, the particle size distribution of the modulating particles 1012 may be obtained by sieving together with microscopy. For example, the approximate shape of the particle size distribution curve of the adjustment particles 1012 may be obtained by sieving, and the particle size values corresponding to the points in the particle size distribution curve of the adjustment particles 1012 may be obtained and adjusted by microscopy.
In this embodiment, the particle diameter value of the adjustment particles 1012 of 80% or more of the adjustment particles 1012 is in the range of 50% to 140% of the center particle diameter value, that is, 50% ×d is equal to or less than 80% of the adjustment particles 1012 in the optical film 101 is equal to or less than 140% ×d, assuming that the center particle diameter value of the adjustment particles 1012 is D. When the adjustment particles 1012 have different types of adjustment particles 1012 having a large difference in the ratio of the length of the long axis to the diameter, the different types of adjustment particles 1012 are controlled separately. Specifically, each of the first type adjustment particles 1012a has a first particle size value, and all of the first type adjustment particles 1012a correspond to one first central particle size value, and in the first type adjustment particles 1012a, greater than or equal to 80% of the first type adjustment particles 1012a have a particle size value within a range from 50% to 140% of the first central particle size value, that is, if the first central particle size value of the first type adjustment particles 1012a is D1, 50% x D1 is equal to or less than 80% of the first particle size values of the first type adjustment particles 1012a in the optical film 101 are equal to or less than 140% x D1; and/or, each of the second-type adjustment particles 1012b has a second particle diameter value, and all of the second-type adjustment particles 1012b correspond to one second center particle diameter value, and in the second-type adjustment particles 1012b, greater than or equal to 80% of the second-type adjustment particles 1012b have a second particle diameter value within a range of 50% to 140% of the second center particle diameter value, that is, 50% x D2 is equal to or less than 140% x D2 of 80% of the second-type adjustment particles 1012b in the optical film 101, provided that the second center particle diameter value of the second-type adjustment particles 1012b is D2.
In some embodiments, 80% of the adjustment particles 1012 in the optical film 101 may have a particle size value corresponding to the adjustment particles 1012 having a volume distribution in the range of 10% to 90% of the particle size distribution curve of the adjustment particles 1012 in the optical film 101.
In this embodiment, the base material 1011 is formed into the optical film 101 by a process such as stretching after the addition of the adjustment particles 1012, and in the process of forming the optical film 101, the base material 1011 is crystallized with each adjustment particle 1012 as a core, the crystallization degree of the base material 1011 with the adjustment particles 1012 having different particle diameters as a core is different, and the particle size distribution of the adjustment particles 1012 in the optical film 101 is widely controlled, which makes it difficult to control the quality of the formed optical film 101 and the stability of the optical effect to be achieved. By setting the particle diameter value of the adjustment particles 1012 to be equal to or larger than 80% of the adjustment particles 1012, for example, 85%, 90%, 95%, 100%, etc., in the range of 50% to 140% of the center particle diameter value, it is advantageous that the degree of crystallization of the base material 1011 around the adjustment particles 1012 is made uniform during the formation of the optical film 101, and thus the product quality and the stability of the optical performance of the optical film 101 are improved.
Preferably, among the adjustment particles 1012, the particle diameter value of the adjustment particles 1012 of 80% or more is in the range of 70% to 110% of the center particle diameter value, that is, 70% x D is equal to or less than 80% of the adjustment particles 1012 in the optical film 101 are equal to or less than 110% x D assuming that the center particle diameter value of the adjustment particles 1012 is D. When the adjustment particles 1012 have different types of adjustment particles 1012 having a large difference in the ratio of the length of the long axis to the diameter, the different types of adjustment particles 1012 are controlled separately. Specifically, each of the first type of adjustment particles 1012a has a first particle size value, and all of the first type of adjustment particles 1012a correspond to one first central particle size value, and in the first type of adjustment particles 1012a, greater than or equal to 80% of the first particle size values of the first type of adjustment particles 1012a are in the range of 70% to 110% of the first central particle size values, that is, if the first central particle size value of the first type of adjustment particles 1012a is D1, 70% x D1 is equal to or less than 80% of the first particle size values of the first type of adjustment particles 1012a in the optical film 101 are equal to or less than 110% x D1; and/or, each of the second-type adjustment particles 1012b has a second particle diameter value, and all of the second-type adjustment particles 1012b correspond to one second center particle diameter value, and in the second-type adjustment particles 1012b, greater than or equal to 80% of the second-type adjustment particles 1012b have a second particle diameter value within a range of 70% to 110% of the second center particle diameter value, that is, 70% x D2 is equal to or less than 110% x D2 of 80% of the second-type adjustment particles 1012b in the optical film 101, provided that the second center particle diameter value of the second-type adjustment particles 1012b is D2. By setting the particle diameter value of the adjustment particles 1012 to be equal to or larger than 80% of the adjustment particles 1012, for example, 85%, 90%, 95%, 100%, etc., in the range of 70% to 110% of the center particle diameter value, it is further advantageous that the degree of crystallization of the base material 1011 with the adjustment particles 1012 as the core is made uniform during the formation of the optical film 101, and thus the product quality and the stability of the optical performance of the optical film 101 are improved.
In some embodiments, the optical film 101 has an in-plane retardation value, the in-plane retardation value of the optical film 101 being less than 3000 nanometers. The in-plane retardation value of the optical film 101 is a retardation value of the optical film 101 in a plane of the optical film 101, and the plane of the optical film 101 is perpendicular to the thickness direction of the optical film 101. The optical film 101 has a retardation in the thickness direction of the optical film 101, and when light passes through the optical film 101, due to the difference between the refractive index of the light in the plane of the optical film 101 and the refractive index of the light in the thickness direction of the optical film 101, the retardation in the plane of the optical film 101 and the retardation in the thickness direction are different, and when the retardation in the plane of the optical film 101 is 3000 nm or more, the retardation in the plane of the optical film 101 and the retardation in the thickness direction of the optical film 101 are excessively different, and when the light passes through the optical film 101, a rainbow phenomenon is observed in a large angle direction (for example, an angle of 45 degrees, 60 degrees or the like with the thickness direction of the optical film 101). By adding the adjusting particles 1012, the difference between the refractive index of the light ray in the plane of the optical film 101 and the thickness direction of the optical film 101 is reduced, so that the in-plane retardation value of the optical film 101 is less than 3000 nanometers, thereby improving the rainbow pattern problem of the optical film 101 in the large-angle direction and improving the display quality of the display device with the optical film 101.
In some embodiments, the in-plane retardation value of the optical film 101 may be calculated by the following formula:
Re=d×∣n x -n y ∣
wherein Re represents the in-plane retardation value, n, of the optical film 101 x Represents the extraordinary refractive index, n y Represents the ordinary refractive index and d represents the thickness of the optical film 101.
In some embodiments, the in-plane retardation value of the optical film 101 may be obtained by a phase retardation measuring instrument (e.g., optipro-micro of shintech company) under a continuous spectrum white light source, thereby obtaining the in-plane retardation value of the optical film 101 through the above formula.
In some embodiments, retardation in the thickness direction of the optical film 101The amount may be the anisotropy value DeltaN of the two sets of refractive indices observed by the optical film 101 in a section perpendicular to the plane in which the optical film 101 is located xz =△∣n x -n z ∣、△N yz =△∣n y -n z Average value of products of y and thickness of the optical film 101, n z Is the refractive index in the thickness direction of the optical film 101.
In some embodiments, the in-plane retardation value of the optical film 101 is greater than or equal to 0nm, and the in-plane retardation value of the optical film 101 is less than or equal to 1000nm, which is advantageous for further reducing the difference between the in-plane retardation value of the optical film 101 and the retardation value of the optical film 101 in the thickness direction, for example, 20 nm, 50 nm, 100 nm, 120 nm, 150 nm, 200 nm, 220 nm, 250 nm, 300 nm, 320 nm, 350 nm, 400 nm, 420 nm, 450 nm, 500 nm, 520 nm, 550 nm, 600 nm, 620 nm, 650 nm, 700 nm, 720 nm, 750 nm, 800 nm, 820 nm, 850 nm, 900 nm, 920 nm, 950 nm, etc., thereby effectively improving the rainbow problem of the optical film 101 in the large-angle direction and improving the display quality of the display device having the optical film 101. Preferably, the in-plane retardation value of the optical film 101 is greater than or equal to 0nm, and the in-plane retardation value of the optical film 101 is less than or equal to 500 nm, so that the rainbow problem of the optical film 101 in a large-angle direction is further effectively improved, and the display quality of a display device with the optical film 101 is improved; more preferably, the in-plane retardation value of the optical film 101 is greater than or equal to 0nm, and the in-plane retardation value of the optical film 101 is less than or equal to 200 nm, so that the range of the in-plane retardation value of the optical film 101 is closest to the range of the retardation value of the optical film 101 in the thickness direction, thereby most effectively improving the rainbow pattern problem of the optical film 101 in the large-angle direction and improving the display quality of the display device having the optical film 101.
In some embodiments, the ratio of the in-plane retardation value of the optical film 101 to the thickness direction retardation value of the optical film 101 is closer to 1, and the smaller the difference between the refractive index of the light in the plane of the optical film 101 and the refractive index of the light in the thickness direction of the optical film 101, the more advantageous the rainbow problem can be eliminated. The ratio of the in-plane retardation value of the optical film 101 to the thickness direction retardation value of the optical film 101 is greater than 0.1, and the ratio of the in-plane retardation value of the optical film 101 to the thickness direction retardation value of the optical film 101 is less than 2, for example, may be 0.2, 0.5, 0.6, 0.8, 1, 1.2, 1.4, 1.5, 1.6, 1.8, etc., so that the rainbow problem can be effectively improved. Preferably, when the ratio of the in-plane retardation value of the optical film 101 to the thickness direction retardation value of the optical film 101 is greater than or equal to 0.5 and the ratio of the in-plane retardation value of the optical film 101 to the thickness direction retardation value of the optical film 101 is less than or equal to 1.5, the occurrence of rainbow-mark problem can be substantially avoided. More preferably, when the ratio of the in-plane retardation value of the optical film 101 to the thickness direction retardation value of the optical film 101 is 0.6 or more and the ratio of the in-plane retardation value of the optical film 101 to the thickness direction retardation value of the optical film 101 is 1.2 or less, complete elimination of rainbow lines can be achieved.
In some embodiments, the conditioning particles 1012 have a long axis and a diameter, the length of the long axis of the conditioning particles 1012 is the distance between the two ends of the long axis of the conditioning particles 1012, and the length of the long axis of the conditioning particles 1012 is the particle size value of the conditioning particles 1012. Each of the adjustment particles 1012 has a plurality of cross sections in an extending direction perpendicular to a long axis of the adjustment particle, each cross section has one circumscribed circle, and a diameter of the adjustment particle 1012 corresponds to a diameter of a circumscribed circle having a largest diameter among the plurality of cross sections. Wherein, the two points farthest from the cross section of the adjusting particle 1012 are located on the circumscribing circle of the cross section, and the distance between the two points farthest from the cross section is the diameter of the circumscribing circle.
In some embodiments, the first particle size value of each of the first type of tuning particles 1012a is the same as the length of the long axis of each of the first type of tuning particles 1012a, and the first center particle size value of the first type of tuning particles 1012a is less than 20 microns, e.g., can be 0.5 microns, 1 micron, 3 microns, 5 microns, 8 microns, 10 microns, 12 microns, 15 microns, 18 microns, etc.; and/or, the first particle size value of each of the first type of adjustment particles 1012a is the same as the particle size value of each of the second type of adjustment particles 1012b and the length of the long axis of the second type of adjustment particles 1012b, and the second center particle size value of the second type of adjustment particles 1012b is smaller than 20 micrometers, for example, may be 0.5 micrometers, 1 micrometer, 3 micrometers, 5 micrometers, 8 micrometers, 10 micrometers, 12 micrometers, 15 micrometers, 18 micrometers, etc., so that the first type of adjustment particles 1012a having a particle size value close to the first center particle size value and/or the second type of adjustment particles 1012b having a particle size value close to the second center particle size value can be quickly obtained by a sieving method, which facilitates mass production of the optical film 101.
Referring to fig. 1, the conditioning particles 1012 include a first type of conditioning particles 1012a.
The first type of adjustment particles 1012a have a plurality of first cross sections, each of the first cross sections has a first circumscribing circle, a ratio of a length of a long axis of the first type of adjustment particles 1012a to a diameter of the first circumscribing circle with a largest diameter among the plurality of first circumscribing circles is greater than or equal to 1, a ratio of a length of a long axis of the first type of adjustment particles 1012a to a diameter of the first circumscribing circle with a largest diameter among the plurality of first circumscribing circles is less than 5, and may be, for example, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.2, 2.5, 2.8, 3, 3.5, 4, 4.5, etc., and the first cross section is perpendicular to an extending direction of the long axis of the second type of adjustment particles 1012 b. By making the adjustment particles 1012 include the first type adjustment particles 1012a having a small aspect ratio (ratio of the length of the long axis to the diameter of the first circumscribed circle having the largest diameter), it is advantageous to effectively reduce the in-plane retardation value of the optical film 101 to 3000 nm or less, to effectively reduce the difference between the in-plane retardation value of the optical film 101 and the retardation value of the optical film 101 in the thickness direction, to improve the rainbow problem of the optical film 101, and to improve the display quality of the display device having the optical film 101.
In some embodiments, the first type of adjustment particles 1012a are at least one selected from a first sub-type of adjustment particles, a second sub-type of adjustment particles, a third sub-type of adjustment particles, a fourth sub-type of adjustment particles, and a fifth sub-type of adjustment particles, which are different from each other in shape.
Wherein a variation value of a diameter of a first circumscribing circle of the first cross section of the first sub-class of tuning particles along an extension direction of a long axis of the first sub-class of tuning particles is less than or equal to 0.3 micron, for example, may be 0 micron, 0.28 micron, 0.25 micron, 0.22 micron, 0.2 micron, 0.18 micron, 0.15 micron, 0.12 micron, 0.1 micron, 0.08 micron, 0.05 micron, 0.02 micron, etc. In some embodiments, along the extension direction of the long axis of the first sub-class adjustment particle, the diameter of the first circumcircle of the first section at the first end of the first sub-class adjustment particle is the same as the diameter of the first circumcircle of the first section at the middle of the first sub-class adjustment particle, and the diameter of the first circumcircle of the first section at the second end of the first sub-class adjustment particle is the same as the diameter of the first circumcircle of the first section at the middle of the first sub-class adjustment particle.
In some embodiments, the first cross-section of the first sub-class of conditioning particles may be a regular shape or a random shape of circles, ovals, triangles, quadrilaterals, and the like.
In some embodiments, the first sub-class adjustment particles are cubic particles or cuboid particles, the first cross section of the first sub-class adjustment particles is square or rectangular, and the diameter of the first circumcircle of any first cross section of the first sub-class adjustment particles is the diagonal length of the square or rectangular that the first cross section takes.
The ratio of the length of the long axis of the first sub-class of adjustment particles to the diameter of the first circumscribed circle having the largest diameter among the plurality of first cross-sections of the first sub-class of adjustment particles is more preferably close to 1, and may be, for example, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.2, 2.5, 3, or the like.
The first end of the second sub-class adjusting particle is connected with the second end of the second sub-class adjusting particle, the diameter of the first circumcircle of the first section, which is positioned at the first end of the second sub-class adjusting particle, is gradually reduced along the direction away from the second end of the second sub-class adjusting particle, and the diameter of the first circumcircle of the first section, which is positioned at the second end of the second sub-class adjusting particle, is gradually reduced along the direction away from the first end of the second sub-class adjusting particle.
It will be appreciated that the diameter of the first circumcircle of the first cross section at the first end of the second sub-class tuning particle gradually decreases in a direction away from the second end of the second sub-class tuning particle, meaning that the diameter of the first circumcircle of the first cross section at the first end of the second sub-class tuning particle in a direction away from the second end of the second sub-class tuning particle exhibits a decreasing trend, including but not limited to the diameter of the first circumcircle of the first cross section at the first end of the second sub-class tuning particle sequentially decreasing in a direction away from the second end of the second sub-class tuning particle.
It will be appreciated that the diameter of the first circumcircle of the first cross section at the second end of the second sub-class tuning particle gradually decreases in a direction away from the first end of the second sub-class tuning particle, meaning that the diameter of the first circumcircle of the first cross section at the second end of the second sub-class tuning particle in a direction away from the first end of the second sub-class tuning particle exhibits a decreasing trend, including but not limited to the diameter of the first circumcircle of the first cross section at the second end of the second sub-class tuning particle sequentially decreasing in a direction away from the first end of the second sub-class tuning particle.
In some embodiments, the first cross-section of the second sub-class of conditioning particles may be a regular shape or a random shape of circles, ovals, triangles, quadrilaterals, and the like.
In some embodiments, the second sub-class adjustment particles are spherical or ellipsoidal particles, and the first cross-section of the second sub-class adjustment particles is circular or elliptical. When the first cross section of the second sub-class adjustment particle is elliptical, a ratio of a major axis of an ellipse of any of the first cross sections of the second sub-class adjustment particle to a minor axis of the ellipse is greater than 1 and less than or equal to 3, for example, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, etc. may be used. When the second sub-class adjustment particles are spherical particles, any one of the first cross sections of the second sub-class adjustment particles is circular, a first circumcircle of any one of the first cross sections coincides with the first cross section, and a ratio of a long axis of the second sub-class adjustment particles to a diameter of a first circumcircle with a largest diameter among the plurality of first cross sections of the second sub-class adjustment particles is 1.
The ratio of the length of the long axis of the second sub-class adjustment particle to the diameter of the first circumscribed circle having the largest diameter among the plurality of first circumscribed circles of the second sub-class adjustment particle is preferably close to 1; when the second-subclass adjusting particles are ellipsoidal particles, the shape thereof is more preferably approximately spherical, that is, the closer the length of the major axis of the second-subclass adjusting particles is to the diameter of the second-subclass adjusting particles, the better. Preferably, a ratio of a length of a long axis of the second sub-class adjustment particle to a diameter of the first circumscribed circle having a largest diameter among the plurality of first circumscribed circles of the second sub-class adjustment particle is greater than or equal to 1, and a ratio of a length of a long axis of the second sub-class adjustment particle to a diameter of the first circumscribed circle having a largest diameter among the plurality of first circumscribed circles of the second sub-class adjustment particle is less than or equal to 3; more preferably, a ratio of a length of a long axis of the second sub-class adjustment particle to a diameter of the first circumscribed circle having a largest diameter among the plurality of first circumscribed circles of the second sub-class adjustment particle is greater than or equal to 1, and a ratio of a length of a long axis of the second sub-class adjustment particle to a diameter of the first circumscribed circle having a largest diameter among the plurality of first circumscribed circles of the second sub-class adjustment particle is less than or equal to 1.5.
The diameter of the first circumscribing circle of the first cross section at the middle portion of the third sub-class tuning particle may have a variation value of less than or equal to 1 micron along the extension direction of the long axis of the third sub-class tuning particle, for example, may be 0 micron, 0.95 micron, 0.8 micron, 0.78 micron, 0.75 micron, 0.72 micron, 0.7 micron, 0.68 micron, 0.65 micron, 0.62 micron, 0.6 micron, 0.58 micron, 0.55 micron, 0.52 micron, 0.5 micron, 0.48 micron, 0.45 micron, 0.42 micron, 0.4 micron, 0.38 micron, 0.35 micron, 0.32 micron, 0.3 micron, 0.28 micron, 0.25 micron, 0.22 micron, 0.2 micron, 0.18 micron, 0.15 micron, 0.12 micron, 0.1 micron, 0.08 micron, 0.05 micron, 0.02 micron, etc. The diameter of the first circumcircle of the first cross section at the first end of the third sub-class tuning particle gradually decreases in a direction away from the middle of the third sub-class tuning particle, and the diameter variation value of the second end of the third sub-class tuning particle is less than or equal to 1 micron, e.g., may be 0 micron, 0.95 micron, 0.8 micron, 0.78 micron, 0.75 micron, 0.72 micron, 0.7 micron, 0.68 micron, 0.65 micron, 0.62 micron, 0.6 micron, 0.58 micron, 0.55 micron, 0.52 micron, 0.5 micron, 0.48 micron, 0.45 micron, 0.42 micron, 0.4 micron, 0.38 micron, 0.35 micron, 0.32 micron, 0.3 micron, 0.28 micron, 0.25 micron, 0.22 micron, 0.2 micron, 0.18 micron, 0.15 micron, 0.12 micron, 0.1 micron, 0.08 micron, 0.02 micron, etc. In some embodiments, the diameter of the first circumcircle of the first cross section at the first end of the third sub-class tuning particle is gradually reduced in a direction away from the middle of the third sub-class tuning particle, and the diameter of the first circumcircle of the first cross section at the second end of the third sub-class tuning particle is the same as the diameter of the first circumcircle of the first cross section at the middle of the third sub-class tuning particle.
It will be appreciated that the diameter of the first circumcircle of the first cross section at the first end of the third sub-class tuning particle gradually decreases in a direction away from the middle of the third sub-class tuning particle, meaning that the diameter of the first circumcircle of the first cross section at the first end of the third sub-class tuning particle in a direction away from the middle of the third sub-class tuning particle tends to decrease in a direction away from the middle of the third sub-class tuning particle, including but not limited to the diameter of the first circumcircle of the first cross section at the first end of the third sub-class tuning particle decreasing in sequence.
In some embodiments, the first cross-section of the third sub-class of conditioning particles may be a regular shape or a random shape of a circle, oval, triangle, quadrilateral, etc.
In some embodiments, the third subclass of regulatory particles may be needle-shaped particles having a reduced diameter at one end.
In some embodiments, when the third sub-class adjustment particle is a needle-shaped particle having a reduced diameter at one end, the first cross section of the third sub-class adjustment particle may be circular or elliptical, and when the first cross section at the second end of the third sub-class adjustment particle or the first cross section at the middle of the third sub-class adjustment particle is elliptical, a ratio of a major axis of the ellipse at any one of the first cross section at the second end or middle of the third sub-class adjustment particle to a minor axis of the ellipse is greater than 1 and less than or equal to 3, for example, may be 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, etc. The first cross section at the first end of the third sub-class adjustment particle has a shape that is identical to the first cross section at the middle of the third sub-class adjustment particle and gradually decreases in area in a direction away from the middle of the third sub-class adjustment particle.
The diameter of the first circumscribing circle of the first cross section at the middle portion of the fourth sub-class tuning particle has a variation value of less than or equal to 1 micron along the extension direction of the long axis of the fourth sub-class tuning particle, for example, may be 0 micron, 0.95 micron, 0.8 micron, 0.78 micron, 0.75 micron, 0.72 micron, 0.7 micron, 0.68 micron, 0.65 micron, 0.62 micron, 0.6 micron, 0.58 micron, 0.55 micron, 0.52 micron, 0.5 micron, 0.48 micron, 0.45 micron, 0.42 micron, 0.4 micron, 0.38 micron, 0.35 micron, 0.32 micron, 0.3 micron, 0.28 micron, 0.25 micron, 0.22 micron, 0.2 micron, 0.18 micron, 0.15 micron, 0.12 micron, 0.1 micron, 0.08 micron, 0.05 micron, 0.02 micron, etc.; the diameter of the first circumscribed circle of the first section at the first end of the fourth sub-class of adjustment particles gradually decreases along a direction away from the middle of the fourth sub-class of adjustment particles, and the diameter of the first circumscribed circle of the first section at the second end of the fourth sub-class of adjustment particles gradually decreases. In some embodiments, along the extending direction of the long axis of the fourth sub-class adjustment particle, the diameter of the first circumcircle of the first section located at the middle of the fourth sub-class adjustment particle is uniform, and the diameters of the first circumcircle of the first section located at the first end of the fourth sub-class adjustment particle and the second end of the fourth sub-class adjustment particle are gradually changed.
It will be appreciated that the diameter of the first circumcircle of the first cross section at the first end of the fourth sub-class tuning particle gradually decreases in a direction away from the middle of the fourth sub-class tuning particle, meaning that the diameter of the first circumcircle of the first cross section at the first end of the fourth sub-class tuning particle in a direction away from the middle of the fourth sub-class tuning particle tends to decrease in a direction away from the middle of the fourth sub-class tuning particle, including but not limited to the diameter of the first circumcircle of the first cross section at the first end of the fourth sub-class tuning particle decreasing in sequence.
It will be appreciated that the diameter of the first circumcircle of the first cross section at the second end of the fourth sub-class tuning particle gradually decreases in a direction away from the middle of the fourth sub-class tuning particle, meaning that the diameter of the first circumcircle of the first cross section at the second end of the fourth sub-class tuning particle in a direction away from the middle of the fourth sub-class tuning particle tends to decrease in a direction, including but not limited to in a direction away from the middle of the fourth sub-class tuning particle, the diameter of the first circumcircle of the first cross section at the second end of the fourth sub-class tuning particle decreases in sequence.
In some embodiments, the first cross-section of the fourth sub-class of conditioning particles may be a regular shape or a random shape of a circle, oval, triangle, quadrilateral, etc.
In some embodiments, the fourth sub-class of conditioning particles may be needle-shaped particles having reduced diameters at both ends.
In some embodiments, when the fourth sub-class adjustment particle may be a needle-shaped particle with reduced diameters at both ends, the first cross-section of the fourth sub-class adjustment particle may be circular or elliptical in shape, and when the first cross-section located at the middle portion of the fourth sub-class adjustment particle is elliptical, any one of the first cross-sections located at the middle portion of the fourth sub-class adjustment particle may have a major axis of ellipse and a minor axis of the ellipse of greater than 1 and less than or equal to 3, for example, may be 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, etc. The first cross section of the first end portion of the fourth sub-class adjustment particle and the second end portion of the fourth sub-class adjustment particle has a shape identical to the first cross section of the middle portion of the fourth sub-class adjustment particle, and gradually decreases in area in a direction away from the middle portion of the fourth sub-class adjustment particle.
The first end of the fifth sub-class adjusting particle is connected with the second end of the fifth sub-class adjusting particle, and the diameter of the first circumcircle of the first section of the fifth sub-class adjusting particle is gradually reduced along the direction from the first end of the fifth sub-class adjusting particle to the second end of the fifth sub-class adjusting particle.
It will be appreciated that the diameter of the first circumcircle of the first cross section of the fifth sub-class adjustment particle gradually decreases in the direction of the first end of the fifth sub-class adjustment particle toward the second end of the fifth sub-class adjustment particle, meaning that the diameter of the first circumcircle of the first cross section of the fifth sub-class adjustment particle sequentially decreases in the direction of the first end of the fifth sub-class adjustment particle toward the second end of the fifth sub-class adjustment particle, including but not limited to in the direction of the first end of the fifth sub-class adjustment particle toward the second end of the fifth sub-class adjustment particle.
In some embodiments, the first cross-section of the fifth subclass of tuning particles may be a regular shape or a random shape of a circle, oval, triangle, quadrilateral, etc.
In some embodiments, the fifth subclass of regulatory particles may be long cone particles.
In some embodiments, when the fifth sub-class of conditioning particles are long cone shaped particles, the first cross-section of the fifth sub-class of conditioning particles is circular or elliptical. The first cross section of the fifth sub-class adjustment particles is uniform in shape and gradually reduces in area along the direction from the first end of the fifth sub-class adjustment particles to the second end of the fifth sub-class adjustment particles. When the first cross section of the fifth sub-class adjustment particle is elliptical, a ratio of a major axis of an ellipse of any of the first cross sections of the fifth sub-class adjustment particle to a minor axis of the ellipse is greater than 1 and less than or equal to 3, for example, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, etc. may be used.
In some embodiments, the first sub-class adjustment particles and the second sub-class adjustment particles have better improvement effect on reducing the difference between the in-plane retardation value of the optical film 101 and the thickness direction retardation value of the optical film 101 than the third sub-class adjustment particles, the fourth sub-class adjustment particles, and the fifth sub-class adjustment particles, and the second sub-class adjustment particles have better improvement effect than the first sub-class adjustment particles. Thus, preferably, the conditioning particles 1012 comprise the first sub-class of conditioning particles and/or the second sub-class of conditioning particles. When the first sub-class adjustment particles and the second sub-class adjustment particles are included in the adjustment particles 1012, the mass fraction of the first sub-class adjustment particles in the adjustment particles 1012 is greater than the mass fraction of the second sub-class adjustment particles in the adjustment particles 1012. Preferably, the first class of adjustment particles 1012a is composed of the second sub-class of adjustment particles and/or the first sub-class of adjustment particles. More preferably, the first class of conditioning particles 1012a is comprised of the second subclass of conditioning particles.
Referring to fig. 1, in some embodiments, the conditioning particles 1012 may be comprised of the first type of conditioning particles 1012 a.
Referring to fig. 2, in some embodiments, the adjusting particles 1012 include a second type of adjusting particles 1012b for improving both the chromaticity viewing angle and the contrast of the optical film 101 while reducing the rainbow problem of the optical film 101.
Wherein the second type of adjustment particles 1012b have a plurality of second cross sections, each of the second cross sections has a second circumscribing circle, a ratio of a length of a long axis of the second type of adjustment particles 1012b to a diameter of the second circumscribing circle having a largest diameter among the plurality of second circumscribing circles is greater than or equal to 5, a ratio of a length of a long axis of the second type of adjustment particles 1012b to a diameter of the second circumscribing circle having a largest diameter among the plurality of second circumscribing circles is less than 100, and the second cross section is perpendicular to an extending direction of the long axis of the second adjustment particles 1012b, for example, may be 10, 12, 15, 16, 18, 20, 30, 32, 34, 35, 36, 38, 40, 42, 45, 46, 48, 50, 52, 55, 56, 58, 60, 62, 65, 68, 70, 80, 90, etc. The diameter of the second circumscribed circle of one of the second cross-sections of the second type of adjustment particles 1012b is the spacing between the two points of the second cross-section that are furthest apart. The second type of adjusting particles 1012b with larger length-diameter ratio (the ratio of the length of the long axis to the diameter of the second circumscribed circle with the largest diameter) is more easy to change the propagation direction of more light rays through the adjusting particles 1012, and the improvement effect of the adjusting particles 1012 on the chromaticity viewing angle and the contrast ratio is facilitated while the rainbow problem is improved.
The second type of adjustment particles 1012b have a slightly weaker effect of reducing the difference between the in-plane retardation value of the optical film 101 and the retardation value of the optical film 101 in the thickness direction than the first type of adjustment particles 1012a, and fewer of the second type of adjustment particles 1012b can have a remarkable effect of improving the chromaticity viewing angle of the optical film 101. Thus, the mass fraction of the second type of conditioning particles 1012b in the conditioning particles 1012 is less than the mass fraction of the first type of conditioning particles 1012a in the conditioning particles 1012. For example, the mass fraction of the first type of conditioning particles 1012a in the conditioning particles 1012 is greater than 50% and the mass fraction of the second type of conditioning particles 1012b in the conditioning particles 1012 is less than 50%. The mass fraction of the first type of conditioning particles 1012a in the conditioning particles 1012 may be 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 99%, etc.
In some embodiments, the second type of adjustment particles 1012b are at least one selected from a sixth sub-class adjustment particle, a seventh sub-class adjustment particle, an eighth sub-class adjustment particle, a ninth sub-class adjustment particle, and a tenth sub-class adjustment particle, which are different from each other in shape;
Wherein the variation value of the diameter of the second circumscribing circle of the second cross section of the sixth sub-class of tuning particles along the extension direction of the long axis of the sixth sub-class of tuning particles is less than or equal to 0.3 micrometer, for example, may be 0 micrometer, 0.28 micrometer, 0.25 micrometer, 0.22 micrometer, 0.2 micrometer, 0.18 micrometer, 0.15 micrometer, 0.12 micrometer, 0.1 micrometer, 0.08 micrometer, 0.05 micrometer, 0.02 micrometer, etc. In some embodiments, along the extending direction of the long axis of the sixth sub-class adjustment particle, the diameter of the second circumscribed circle of the second section at the first end of the sixth sub-class adjustment particle is the same as the diameter of the second circumscribed circle of the second section at the middle of the sixth sub-class adjustment particle, and the diameter of the second circumscribed circle of the second end of the sixth sub-class adjustment particle is the same as the diameter of the second circumscribed circle of the middle of the sixth sub-class adjustment particle.
In some embodiments, the second cross-section of the sixth subclass of tuning particles may be regular or irregular in shape, such as circular, elliptical, triangular, quadrilateral, etc.
In some embodiments, the sixth sub-class adjustment particles may be rod-shaped particles, and when the sixth sub-class adjustment particles are rod-shaped, the second cross-section of the sixth sub-class adjustment particles is circular or elliptical. When the second cross-section of the sixth sub-class of adjustment particles is circular, a second outer circle of the second cross-section of the sixth sub-class of adjustment particles may coincide with the second cross-section. When the second cross-section of the sixth-subclass adjustment particle is elliptical, a diameter of a second circumcircle of each of the second cross-sections of the sixth-subclass adjustment particle is a length of a major axis of an ellipse of each of the second cross-sections of the sixth-subclass adjustment particle, and a ratio of a major axis of an ellipse of one of the second cross-sections of the sixth-subclass adjustment particle to a minor axis of an ellipse of the second cross-section of the sixth-subclass adjustment particle is greater than 1 and less than or equal to 3, for example, may be 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, or the like.
The second circumscribed circle of the second cross-section at the middle portion of the seventh sub-class tuning particle may have a variation value of less than or equal to 1 micron in the direction of extension of the major axis of the seventh sub-class tuning particle, for example, may be 0 micron, 0.95 micron, 0.8 micron, 0.78 micron, 0.75 micron, 0.72 micron, 0.7 micron, 0.68 micron, 0.65 micron, 0.62 micron, 0.6 micron, 0.58 micron, 0.55 micron, 0.52 micron, 0.5 micron, 0.48 micron, 0.45 micron, 0.42 micron, 0.4 micron, 0.38 micron, 0.35 micron, 0.32 micron, 0.3 micron, 0.28 micron, 0.25 micron, 0.22 micron, 0.2 micron, 0.18 micron, 0.15 micron, 0.12 micron, 0.1 micron, 0.08 micron, 0.05 micron, 0.02 micron, etc. The diameter of the second circumscribing circle of the second cross section at the first end of the seventh sub-class tuning particle decreases gradually in a direction away from the middle of the seventh sub-class tuning particle, and the second end of the seventh sub-class tuning particle may have a diameter variation value of less than or equal to 1 micron, e.g., may be 0 micron, 0.95 micron, 0.8 micron, 0.78 micron, 0.75 micron, 0.72 micron, 0.7 micron, 0.68 micron, 0.65 micron, 0.62 micron, 0.6 micron, 0.58 micron, 0.55 micron, 0.52 micron, 0.5 micron, 0.48 micron, 0.45 micron, 0.42 micron, 0.4 micron, 0.38 micron, 0.35 micron, 0.32 micron, 0.3 micron, 0.28 micron, 0.25 micron, 0.22 micron, 0.2 micron, 0.18 micron, 0.15 micron, 0.12 micron, 0.1 micron, 0.08 micron, 0.02 micron, etc. In some embodiments, the diameter of the second circumscribed circle of the second cross section at the first end of the seventh sub-class adjustment particle gradually decreases in a direction away from the middle of the seventh sub-class adjustment particle, and the diameter of the second circumscribed circle of the second cross section at the second end of the seventh sub-class adjustment particle is the same as the diameter of the second circumscribed circle of the second cross section at the middle of the seventh sub-class adjustment particle.
It will be appreciated that the diameter of the second circumscribed circle of the second cross section at the first end of the seventh sub-class adjustment particle gradually decreases in a direction away from the middle of the seventh sub-class adjustment particle, meaning that the diameter of the second circumscribed circle of the second cross section at the first end of the seventh sub-class adjustment particle in a direction away from the middle of the seventh sub-class adjustment particle exhibits a decreasing trend, including but not limited to the diameter of the second circumscribed circle of the second cross section at the first end of the seventh sub-class adjustment particle decreasing in sequence in a direction away from the middle of the seventh sub-class adjustment particle.
In some embodiments, the second cross-section of the seventh subclass of tuning particles may be a regular shape or a irregular shape of circles, ovals, triangles, quadrilaterals, and the like.
In some embodiments, the seventh subclass of regulatory particles may be needle-shaped particles having a reduced diameter at one end.
In some embodiments, when the seventh sub-class adjustment particle is a needle-shaped particle having a reduced diameter at one end, the second cross section of the seventh sub-class adjustment particle may be circular or elliptical, and when the second cross section at the second end of the seventh sub-class adjustment particle or the second cross section at the middle of the seventh sub-class adjustment particle is elliptical, a ratio of a major axis of the ellipse at any one of the second end or middle of the seventh sub-class adjustment particle to a minor axis of the ellipse is greater than 1 and less than or equal to 3, for example, may be 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, or the like. The second cross section at the first end of the seventh sub-class adjustment particle has a shape that is identical to the second cross section at the middle of the seventh sub-class adjustment particle, and gradually decreases in area in a direction away from the middle of the seventh sub-class adjustment particle.
The second circumscribed circle of the second cross-section at the middle portion of the eighth sub-class tuning particle has a variation value of less than or equal to 1 micron in the direction of extension of the major axis of the eighth sub-class tuning particle, for example, may be 0 micron, 0.95 micron, 0.8 micron, 0.78 micron, 0.75 micron, 0.72 micron, 0.7 micron, 0.68 micron, 0.65 micron, 0.62 micron, 0.6 micron, 0.58 micron, 0.55 micron, 0.52 micron, 0.5 micron, 0.48 micron, 0.45 micron, 0.42 micron, 0.4 micron, 0.38 micron, 0.35 micron, 0.32 micron, 0.3 micron, 0.28 micron, 0.25 micron, 0.22 micron, 0.2 micron, 0.18 micron, 0.15 micron, 0.12 micron, 0.1 micron, 0.08 micron, 0.05 micron, 0.02 micron, etc.; the diameter of the second circumscribed circle of the second section at the first end of the eighth sub-class adjustment particle gradually decreases in a direction away from the middle of the eighth sub-class adjustment particle. In some embodiments, along the extending direction of the long axis of the eighth-subclass adjustment particle, the diameter of the second circumscribed circle of the second cross section located at the middle portion of the eighth-subclass adjustment particle is uniform, and the diameters of the second circumscribed circles of the second cross section located at the first end portion of the eighth-subclass adjustment particle and the second end portion of the eighth-subclass adjustment particle are gradually changed.
It will be appreciated that the diameter of the second circumscribed circle of the second cross section at the first end of the eighth sub-category adjustment particle gradually decreases in a direction away from the middle of the eighth sub-category adjustment particle, meaning that the diameter of the second circumscribed circle of the second cross section at the first end of the eighth sub-category adjustment particle in a direction away from the middle of the eighth sub-category adjustment particle exhibits a decreasing trend, including but not limited to the diameter of the second circumscribed circle of the second cross section at the first end of the eighth sub-category adjustment particle decreasing in sequence in a direction away from the middle of the eighth sub-category adjustment particle.
It will be appreciated that the diameter of the second circumscribed circle of the second cross section at the second end of the eighth sub-class adjustment particle gradually decreases in a direction away from the middle of the eighth sub-class adjustment particle, meaning that the diameter of the second circumscribed circle of the second cross section at the second end of the eighth sub-class adjustment particle in a direction away from the middle of the eighth sub-class adjustment particle exhibits a decreasing trend, including but not limited to the diameter of the second circumscribed circle of the second cross section at the second end of the eighth sub-class adjustment particle in a direction away from the middle of the eighth sub-class adjustment particle sequentially decreasing.
In some embodiments, the second cross-section of the eighth sub-class of conditioning particles may be a regular shape or a random shape of circles, ovals, triangles, quadrilaterals, and the like.
In some embodiments, the eighth subclass of regulatory particles may be needle-shaped particles having reduced diameters at both ends.
In some embodiments, when the eighth-subclass adjusting particle may be a needle-shaped particle having a reduced diameter at both ends, the second cross-section of the eighth-subclass adjusting particle may be circular or elliptical in shape, and when the second cross-section located at the middle portion of the eighth-subclass adjusting particle is elliptical, any one of the second cross-sections located at the middle portion of the eighth-subclass adjusting particle may have a major axis of the ellipse and a minor axis of the ellipse of greater than 1 and less than or equal to 3, for example, may be 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, etc. The shape of the second cross section located at the first end portion of the eighth-subclass adjusting particle and the second end portion of the eighth-subclass adjusting particle is identical to the shape of the second cross section located at the middle portion of the eighth-subclass adjusting particle, and the area gradually decreases in a direction away from the middle portion of the eighth-subclass adjusting particle.
The first end of the ninth sub-class adjustment particle is connected with the second end of the ninth sub-class adjustment particle, and the diameter of the second circumscribed circle of the second section of the ninth sub-class adjustment particle gradually decreases along the direction from the first end of the ninth sub-class adjustment particle to the second end of the ninth sub-class adjustment particle.
It will be appreciated that the diameter of the second circumscribed circle of the ninth cross section of the ninth sub-class adjustment particle gradually decreases along the direction of the second end of the ninth sub-class adjustment particle toward the second end of the ninth sub-class adjustment particle, meaning that the diameter of the second circumscribed circle of the second cross section of the ninth sub-class adjustment particle in the direction of the first end of the ninth sub-class adjustment particle toward the second end of the ninth sub-class adjustment particle exhibits a decreasing trend, including but not limited to in the direction of the first end of the ninth sub-class adjustment particle toward the second end of the ninth sub-class adjustment particle, the diameter of the second circumscribed circle of the second cross section of the ninth sub-class adjustment particle sequentially decreasing.
In some embodiments, the second cross-section of the ninth sub-class of conditioning particles may be a regular shape or irregular shape of a circle, oval, triangle, quadrilateral, etc.
In some embodiments, the ninth sub-class of conditioning particles may be long cone particles.
In some embodiments, when the ninth sub-class of conditioning particles are long cone shaped particles, the second cross-section of the ninth sub-class of conditioning particles is circular or elliptical. The second cross section of the ninth sub-class adjustment particle is uniform in shape and gradually reduces in area along the direction from the first end of the ninth sub-class adjustment particle to the second end of the ninth sub-class adjustment particle. When the second cross section of the ninth sub-class adjustment particle is elliptical, a ratio of a major axis of an ellipse of any of the second cross sections of the ninth sub-class adjustment particle to a minor axis of the ellipse is greater than 1 and less than or equal to 3, for example, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, etc. may be used.
The first end of the tenth sub-class adjusting particle is connected with the second end of the tenth sub-class adjusting particle, the diameter of the second circumscribed circle of the second section at the first end of the tenth sub-class adjusting particle is gradually reduced along the direction away from the second end of the tenth sub-class adjusting particle, and the diameter of the second circumscribed circle of the second section at the second end of the tenth sub-class adjusting particle is gradually reduced along the direction away from the first end of the tenth sub-class adjusting particle.
It will be appreciated that the diameter of the second circumcircle of the second cross section at the first end of the tenth sub-class tuning particle gradually decreases in a direction away from the second end of the tenth sub-class tuning particle, meaning that the diameter of the second circumcircle of the second cross section at the first end of the tenth sub-class tuning particle in a direction away from the second end of the tenth sub-class tuning particle tends to decrease in a sequence, including but not limited to the diameter of the second circumcircle of the second cross section at the first end of the tenth sub-class tuning particle in a direction away from the second end of the tenth sub-class tuning particle.
It will be appreciated that the diameter of the second circumscribed circle of the second cross-section at the second end of the tenth sub-class tuning particle gradually decreases in a direction away from the first end of the tenth sub-class tuning particle, meaning that the diameter of the second circumscribed circle of the second cross-section at the second end of the tenth sub-class tuning particle in a direction away from the first end of the tenth sub-class tuning particle exhibits a decreasing trend, including but not limited to the diameter of the second circumscribed circle of the second cross-section at the second end of the tenth sub-class tuning particle decreasing in sequence in a direction away from the first end of the tenth sub-class tuning particle.
In some embodiments, the second cross-section of the tenth sub-class of conditioning particles may be a regular shape or irregular shape of circles, ovals, triangles, quadrilaterals, and the like.
In some embodiments, the tenth subclass of regulatory particles may be biconical particles and/or ellipsoidal particles.
In some embodiments, when the tenth sub-class adjustment particles are biconical particles and/or ellipsoidal particles, the second cross-section of the tenth sub-class adjustment particles is circular or elliptical. The second cross section at the first end of the tenth sub-class of adjustment particles is uniform in shape and gradually reduces in area in a direction away from the second end of the tenth sub-class of adjustment particles; the second cross section at the second end of the tenth sub-class of tuning particles is uniform in shape and gradually reduces in area in a direction away from the first end of the tenth sub-class of tuning particles. When the second cross section of the tenth sub-class adjustment particle is elliptical, a ratio of a major axis of an ellipse to a minor axis of the ellipse, which is assumed by any one of the second cross sections of the tenth sub-class adjustment particle, is greater than 1 and less than or equal to 3, for example, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, or the like.
The tenth subclass of adjusting particles is bipyramid-shaped particles and ellipsoidal particles, which are distinguished as follows: when the tenth sub-class adjustment particles are biconical particles, the cross sections of the tenth sub-class adjustment particles in the direction parallel to the long axis of the tenth sub-class adjustment particles are polygons such as triangles, quadrilaterals and the like; when the tenth sub-class adjustment particles are ellipsoidal particles, the tenth sub-class adjustment particles have an elliptical cross section in a direction parallel to the major axis of the tenth sub-class adjustment particles.
In some embodiments, when the conditioning particles 1012 comprise the first type of conditioning particles 1012a and the second type of conditioning particles 1012b, the first type of conditioning particles 1012a comprise the first sub-type of conditioning particles and the second sub-type of conditioning particles, the mass fraction of the second sub-type of conditioning particles in the conditioning particles 1012 is greater than the mass fraction of the first sub-type of conditioning particles in the conditioning particles 1012, which is greater than or equal to the mass fraction of the second type of conditioning particles 1012b in the conditioning particles 1012.
In some embodiments, the mass fraction of the first subclass of regulatory particles in the regulatory particles 1012 is greater than or equal to 50%, e.g., may be 55%, 60%, 70%, 75%, 80%, 85%, 90%, 95%, 99%, 100%, etc. The mass fraction of the second subclass of tuning particles in the tuning particles 1012 is less than or equal to 25%, e.g., may be 20%, 15%, 10%, 5%, 3%, 1%, 0%, etc. The mass fraction of the second type of conditioning particles 1012b in the conditioning particles 1012 is less than or equal to 25%, e.g. may be 20%, 15%, 10%, 5%, 3%, 1%, 0%, etc.
In some embodiments, the second class of adjustment particles 1012b is selected from at least two of the third sub-class adjustment particles, the fourth sub-class adjustment particles, the fifth sub-class adjustment particles, the sixth sub-class adjustment particles, and the seventh sub-class adjustment particles; preferably, the second type of adjustment particles 1012b are a mixture of the third sub-class adjustment particles, the fourth sub-class adjustment particles, and the fifth sub-class adjustment particles, or the second type of adjustment particles 1012b are a mixture of the third sub-class adjustment particles, the sixth sub-class adjustment particles, and the seventh sub-class adjustment particles, or the second type of adjustment particles 1012b are a mixture of the third sub-class adjustment particles, the fourth sub-class adjustment particles, the fifth sub-class adjustment particles, the sixth sub-class adjustment particles, and the seventh sub-class adjustment particles. By the second type of adjustment particles 1012b being selected from at least two kinds of particles having different shapes, the diversity of the shapes of the second type of adjustment particles 1012b is increased, and the optical anisotropy of the second type of adjustment particles 1012b is increased, which helps to improve the contrast and brightness improving effect of the second type of adjustment particles 1012 b. The second type of adjustment particles 1012b are selected from a third sub-type adjustment particles, a fourth sub-type adjustment particles and a fifth sub-type adjustment particles, or the second type of adjustment particles 1012b are selected from the third sub-type adjustment particles, the sixth sub-type adjustment particles and the seventh sub-type adjustment particles, or when the second type of adjustment particles 1012b are a mixture of the third sub-type adjustment particles, the fourth sub-type adjustment particles, the fifth sub-type adjustment particles, the sixth sub-type adjustment particles and the seventh sub-type adjustment particles, the mass fraction of the third sub-type adjustment particles in the second type of adjustment particles 1012b is 1% to 8%, for example, may be 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 6%, 6.5%, 7%, 7.5%, etc.; the mass fraction of the fourth sub-class adjustment particles and/or the sixth sub-class adjustment particles in the second class adjustment particles 1012ba is 40% to 50%, for example, may be 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, etc.; the mass fraction of the fifth sub-class adjustment particles and/or the seventh sub-class adjustment particles in the second class adjustment particles 1012b is 45% to 55%, for example, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, etc. The mixing of the third sub-class adjusting particles, the fourth sub-class adjusting particles and/or the sixth sub-class adjusting particles, the fifth sub-class adjusting particles and/or the seventh sub-class adjusting particles according to the above ratio helps to further improve the contrast and brightness improving effect of the obtained adjusting particles 1012.
In some embodiments, the mass fraction of the conditioning particles 1012 in the optical film 101 is less than or equal to 20%, for example, may be 0.0001%, 0.001%, 0.01%, 0.02%, 0.05%, 0.1%, 0.5%, 1%, 5%, 8%, 10%, 12%, 15%, 18%, etc. so as to be uniformly dispersed in the optical film 101, and while improving the product stability of the optical film 101, the optical performance of the optical film 101 is effectively improved, such as: the rainbow pattern problem in the large angle direction improves the product quality and stability of the display device having the optical film 101. The smaller mass fraction of the conditioning particles 1012 in the optical film 101 can effectively reduce the rainbow lines of the optical film 101 in a large angle direction, and the smaller the mass fraction, the better the dispersibility. Preferably, the mass fraction of the conditioning particles 1012 in the optical film 101 is less than or equal to 10%; further preferably, the mass fraction of the conditioning particles 1012 in the optical film 101 is less than or equal to 5%; more preferably, the mass fraction of the conditioning particles 1012 in the optical film 101 is less than or equal to 1%; still more preferably, the mass fraction of the conditioning particles 1012 in the optical film 101 is less than or equal to 0.05%. Meanwhile, in order to ensure that the amount of the adjustment particles 1012 in the optical film 101 is sufficient to effectively improve the rainbow pattern of the optical film 101 in a wide angle direction, the mass fraction of the adjustment particles 1012 in the optical film 101 may be 0.001% or more, preferably 0.003% or more, more preferably 0.005% or more, still more preferably 0.015% or more, and still more preferably 0.03% or more.
In some embodiments, the second type of conditioning particles 1012b are whiskers. The material of the first type of adjustment particles 1012a and the material of the second type of adjustment particles 1012b are at least one selected from the group consisting of silicon dioxide, silicon carbide, silicon nitride, zinc oxide, magnesium oxide, aluminum oxide, calcium sulfate, calcium carbonate, potassium titanate, aluminum borate, and polymers (e.g., polystyrene).
In some embodiments, the second type of tuning particles 1012b and/or the first type of tuning particles 1012a may be surface modified to aid in the dispersion of the second type of tuning particles 1012b and/or the first type of tuning particles 1012a in the substrate 1011 or to enhance the toughness of the second type of tuning particles 1012b and/or the first type of tuning particles 1012a, among other functionalities. When the second type of adjustment particles 1012b and/or the first type of adjustment particles 1012a are surface modified, the surface of the second type of adjustment particles 1012b and/or the first type of adjustment particles 1012a is modified with at least one of an inorganic cation, an inorganic anion, a polymer, a coupling agent or a surfactant, i.e. the surface of the second type of adjustment particles 1012b and/or the first type of adjustment particles 1012a comprises at least one of an inorganic cationic group, an inorganic anionic group, a polymer group, a coupling agent group or a surfactant group.
Specifically, the surface of the second type of adjustment particles 1012b and/or the first type of adjustment particles 1012a is modified with at least one selected from the group consisting of magnesium chloride, calcium chloride, barium chloride, strontium chloride, stearic acid, sodium stearate, zinc stearate, sulfonic acid type surfactants, thio type surfactants, titanate esters, aluminate esters, polyacrylamide, silane, alkyl phosphate esters, aryl phosphate esters, alkyl alcohol amide phosphate esters, imidazoline phosphate esters, high polyphosphate esters, and siloxane phosphate esters. Preferably, the surface of the second type of adjustment particles 1012b and/or the first type of adjustment particles 1012a is modified with at least one of a sulfonic acid type surfactant or a thio type surfactant. The sulfonic acid surfactant can be at least one selected from alkyl sulfonate and fluoroalkyl sulfonate, and concretely, at least one selected from sodium dodecyl sulfonate, sodium dodecyl benzene sulfonate and sodium fluorododecyl sulfonate; the thio-type surfactant can be at least one selected from mercaptan and fluoromercaptan, and specifically, at least one selected from octanethiol, dodecanethiol, tetradecanethiol, octadecanethiol, fluorooctanethiol and fluorododecanethiol. When the sulfonic acid surfactant is mixed with the adjusting particles 1012 to be surface-modified, sulfonic acid surface active groups form sulfonic acid group shell layers, such as benzene ring sulfonic acid group shell layers, on the whisker surface, which is beneficial to protecting the adjusting particles 1012, enhancing the toughness of the adjusting particles 1012 and reducing the breakage of the second type adjusting particles 1012b and/or the first type adjusting particles 1012a in the optical film 101; when the thio-type surface active groups are mixed with the adjustment particles 1012 to be surface-modified, the thio-type surface active groups and hydroxyl groups on the whisker surface form a cross-linked network of O-S-O, and the bond energy of O-S-O is relatively large, which is beneficial to protecting the second type adjustment particles 1012b and/or the first type adjustment particles 1012a during the process of mixing the second type adjustment particles 1012b and/or the first type adjustment particles 1012a with the material of the substrate 1011 and forming the optical film 101, reducing the breakage of the second type adjustment particles 1012b and/or the first type adjustment particles 1012a, and improving the improving effect of the second type adjustment particles 1012b and/or the first type adjustment particles 1012a on the optical functions such as contrast, brightness and the like. More preferably, the second type of adjusting particles 1012b and/or the first type of adjusting particles 1012a are subjected to at least one of a sulfonic acid surfactant containing fluorine substituent and a thio surfactant containing fluorine substituent, specifically, at least one of sodium fluorododecyl sulfonate, fluorooctyl mercaptan and fluorododecyl mercaptan, the fluorine atoms have high stability in an alkyl chain, the bond energy of the carbon-fluorine bond is higher than that of the carbon-carbon bond and the carbon-fluorine bond has shielding effect on the carbon-carbon bond, so that the carbon-carbon bond is protected, and the stability of the second type of adjusting particles 1012b and/or the first type of adjusting particles 1012a is improved.
In some embodiments, the difference between the refractive index of the substrate 1011 and the refractive index of the adjusting particle 1012 is greater than or equal to 0.02, for example, may be 0.03, 0.05, 0.09, 0.1, 0.15, 0.2, etc., so that the adjusting particle 1012 can realize a light diffusion function while improving the rainbow pattern problem of the optical film 101, and further improve the optical performance of the optical film 101. Preferably, the refractive index difference between the substrate 1011 and the adjustment particles 1012 is 0.1 or more, for example, 0.12, 0.13, 0.14, 0.15, 0.2, or the like.
In some embodiments, the substrate 1011 has a glass transition temperature of 70 ℃ to 600 ℃, e.g., may be 80 ℃, 90 ℃, 100 ℃, 150 ℃, 200 ℃, 250 ℃, 300 ℃, 350 ℃, 400 ℃, 450 ℃, 500 ℃, 550 ℃, etc.
In some embodiments, the substrate 1011 has an elastic modulus at 23 ℃ of 500 megapascals to 5000 megapascals, for example, may be 600 megapascals, 700 megapascals, 800 megapascals, 900 megapascals, 1000 megapascals, 1200 megapascals, 1500 megapascals, 1800 megapascals, 2000 megapascals, 2200 megapascals, 2500 megapascals, 2800 megapascals, 3000 megapascals, 3200 megapascals, 3500 megapascals, 3800 megapascals, 4000 megapascals, 4200 megapascals, 4500 megapascals, 4800 megapascals, and the like.
In some embodiments, the elastic modulus of the substrate 1011 may be obtained at 50% humidity.
In some embodiments, the substrate 1011 is selected from at least one of a modified or modified polyester, a modified or unmodified cellulose acetate.
In some embodiments, the modified or unmodified polyester may include at least one of modified or unmodified polyethylene terephthalate, modified or unmodified polycarbonate, modified or unmodified polymethyl methacrylate, modified or unmodified polyethylene naphthalate. The modified or unmodified cellulose acetate may comprise modified or unmodified cellulose triacetate.
In some embodiments, the substrate 1011 may include a first sub-substrate and a second sub-substrate, and the first sub-substrate may be selected from at least one of an unmodified polyester and an unmodified cellulose acetate. The second sub-substrate may be at least one selected from the group consisting of modified polyester, modified cellulose acetate. In the substrate 1011, the mass fraction of the first sub-substrate is greater than the mass fraction of the second sub-substrate.
In some embodiments, the first sub-substrate and the second sub-substrate are uniformly mixed with each other, and the mass fraction of the first sub-substrate in the substrate 1011 is greater than or equal to 65%, for example, may be 70%, 75%, 80%, 85%, 90%, 95%, 99%, or the like. The mass fraction of the second base material in the base material 1011 is 35% or less, and may be 1%, 5%, 10%, 15%, 20%, 25%, 30%, or the like, for example. Advantageously, the modified polyester such as polyethylene terephthalate has good miscibility with the unmodified polyester such as polyethylene terephthalate or the unmodified cellulose acetate such as triacetate has good miscibility with the unmodified cellulose acetate such as triacetate, helps to improve the mechanical properties, flatness, crystallinity of the substrate 1011 and improves the dispersibility of the adjustment particles 1012, thereby improving the optical properties of the optical film 101.
In some embodiments, the modified cellulose triacetate, modified polyethylene terephthalate, modified polycarbonate, modified polymethacrylate, or modified polyethylene naphthalate may be obtained by hydrophilic modification or lipophilic modification of unmodified cellulose triacetate, unmodified polyethylene terephthalate, unmodified polycarbonate, unmodified polymethacrylate, or unmodified polyethylene naphthalate, respectively. For example, the modified polyethylene terephthalate may be obtained by introducing a linear alkyl side chain, a carboxyl side chain, a hydroxyl side chain or a side chain containing a fluorine group into unmodified polyethylene terephthalate; when the modified polyethylene terephthalate may be one in which carboxyl side chains and/or hydroxyl side chains are incorporated into the unmodified polyethylene terephthalateThe alcohol ester may be incorporated in the phenyl group of the unmodified polyethylene terephthalate、/>And a group, wherein n and m are integers greater than or equal to 0 and less than or equal to 10.
In some embodiments, when the first base material is selected from the group consisting of unmodified polyethylene terephthalate, the second base material is selected from the group consisting of modified polyethylene terephthalate, which is advantageous in that the modified polyethylene terephthalate has good miscibility with the unmodified polyethylene terephthalate, which is advantageous in that the mechanical properties, flatness, crystallinity of the base material 1011 are improved and the dispersibility of the adjustment particles 1012 is improved, thereby improving the optical performance of the optical film 101.
In some embodiments, the thickness of the optical film 101 is greater than or equal to 5 microns, and the thickness of the optical film 101 is less than or equal to 500 microns, e.g., 10 microns, 50 microns, 60 microns, 100 microns, 150 microns, 200 microns, 250 microns, 300 microns, 350 microns, 400 microns, 450 microns, etc., to facilitate processing of the optical film 101 and to maintain proper light transmission of the optical film 101. Preferably, the thickness of the optical film 101 is greater than or equal to 15 micrometers, and the thickness of the optical film 101 is less than or equal to 150 micrometers, for example, 20 micrometers, 25 micrometers, 30 micrometers, 40 micrometers, 50 micrometers, 60 micrometers, 80 micrometers, 100 micrometers, 120 micrometers, 130 micrometers, 140 micrometers, and the like.
According to the optical film 101 provided by the embodiment of the invention, the particle size distribution range of the adjusting particles 1012 added in the base material 1011 of the optical film 101 is controlled, so that most of the particle size values of the adjusting particles 1012 are close to the central particle size value, the product stability of the optical film 101 is improved, and the stability of the product quality of the display device with the optical film 101 is improved.
Referring to fig. 3 to 6, an embodiment of the present invention further provides a polarizer 100 including the optical film 101 as described above.
The polarizer 100 further includes a polarizing layer 102 on one side of the optical film 101.
Referring to fig. 3 to 6, in some embodiments, the polarizer 100 further includes a second optical functional layer 103 disposed on at least one side of the substrate 1011.
Wherein the second optical functional layer 103 is located between the polarizing layer 102 and the optical film 101; alternatively, the second optical functional layer 103 is located on a side of the optical film 101 away from the polarizing layer 102.
In some embodiments, the second optical functional layer 103 is located on a side of the optical film 101 away from the polarizing layer 102, and the polarizer 100 further includes a first adhesive layer 104 located on the optical film 101 near the polarizing layer 102.
Wherein the first adhesive layer 104 is in direct contact with the polarizing layer 102; alternatively, the polarizer 100 further includes a protective layer 105 between the optical film 101 and the polarizing layer 102, and the first adhesive layer 104 is in direct contact with the protective layer 105.
In some embodiments, the first adhesive layer 104 is in direct contact with the optical film 101, the first adhesive layer 104 is in direct contact with the polarizing layer 102; alternatively, the first adhesive layer 104 is in direct contact with the optical film 101, and the first adhesive layer 104 is in direct contact with the protective layer 105.
In some embodiments, the first adhesive layer 104 may be selected from at least one of a water gel, a pressure sensitive adhesive, and an ultraviolet gel, the material of the water gel may be selected from polyvinyl alcohol, the material of the pressure sensitive adhesive may be selected from an acrylate copolymer, and the material of the ultraviolet gel may be selected from a multifunctional acrylate monomer.
Referring to fig. 3 to 5, in some embodiments, the second optical functional layer 103 includes at least one of a transparent hardening sub-layer 107, a low reflection sub-layer 108, an anti-reflection sub-layer, an anti-fingerprint sub-layer, and an anti-static sub-layer. When the second optical functional layer 103 is a low reflection sublayer 108, the low reflection sublayer 108 may be formed by stacking a transparent hardened sub-portion 108a and a low refraction sub-portion 108 b.
In some embodiments, the polarizing layer 102 is composed of polyvinyl alcohol and a dye.
In some embodiments, the polarizer 100 further includes a release layer 109 on a side of the polarizing layer 102 remote from the optical film 101, the release layer 109 being bonded to the polarizing layer 102 by a second adhesive layer 110. When the polarizer 100 is applied to the display device, the release layer 109 is removed to expose the second adhesive layer 110, so that the polarizer 100 is attached to the display panel through the second adhesive layer 110.
In some embodiments, the polarizer 100 further includes a compensation layer 111 between the second adhesive layer 110 and the polarizing layer 102.
By arranging the optical film 101, the embodiment of the invention improves the chromaticity viewing angle and contrast of the display device with the polarizer 100 while avoiding the optical defects such as moire or white spots caused by the polarizer 100.
Referring to fig. 7, an embodiment of the present invention further provides a display device 10 including the polarizer 100 as described above.
Specifically, the display device includes a display panel 200 and a first polarizer 300, where the first polarizer 300 is located on the light-emitting side of the display panel 200, and the first polarizer 300 is selected from the polarizers 100 as described above.
In some embodiments, the display panel 200 may be a liquid crystal display panel, a self-luminous display panel, or the like, and the self-luminous display panel may be an OLED (Organic Light-Emitting Diode) display panel, or the like.
In some embodiments, the optical film 101 in the first polarizer 300 is located on a side of the polarizing layer 102 in the first polarizer 300 away from the display panel.
When the display panel 200 is a liquid crystal display panel, the display device 10 further includes a backlight module 400 located at a side of the display panel 200 away from the first polarizer 300, where the backlight module 400 is configured to provide a light source for the display panel 200; the display device 10 further includes a second polarizer 500 disposed between the backlight module 400 and the display panel 200. The second polarizer 500 may be selected from the polarizers 100 as described above, or the second polarizer 500 may not be selected from the polarizers 100 as described above.
Next, the present invention will be described in more detail with reference to some embodiments. It should be noted, however, that these examples are provided for illustration only and should not be construed as limiting the invention in any way.
Example 1
In this embodiment, the material of the substrate is unmodified polyethylene terephthalate, the adjusting particles in the substrate are needle-shaped calcium carbonate whiskers with reduced diameters at two ends, the substrate and the adjusting particles are mixed and then stretched in MD Direction (Moving Direction) and stretched in TD Direction (Tansfer Direction) (stretching multiplying power is md×td=5×3) to form an optical film 1 with a thickness of 60 micrometers, the mass fraction of the adjusting particles in the optical film 1 is 0.05%, the central particle diameter of the adjusting particles is 18 micrometers, wherein the volume ratio of the particle diameters of the adjusting particles is 0-10 um, 10-18 um, 18-25 um, more than 25um is 10%, 40% and 10%, respectively.
Example 2
This example is similar to example 1, except that the mass fraction of the conditioning particles in the formed optical film 2 is 0.5%.
Example 3
This example is similar to example 1, except that the mass fraction of the conditioning particles in the formed optical film 3 is 1%.
Example 4
This example is similar to example 1, except that the mass fraction of the conditioning particles in the formed optical film 3 is 3%.
Example 5
This example is similar to example 1 except that the center particle diameter of the conditioning particles in the formed optical film 5 is 18 μm, and the conditioning particles in the optical film 5 are obtained by sieving the same conditioning particles as in example 1 through a 625 mesh screen, wherein the volume fractions of the conditioning particles are 16%, 42%, 35% and 7% in the particle diameters of 0 to 10um, 10 to 18um, 18 to 20um, 20um or more, respectively.
Example 6
This example is similar to example 5, except that the mass fraction of the conditioning particles in the formed optical film 6 is 0.5%.
Example 7
This example is similar to example 5, except that the mass fraction of the conditioning particles in the formed optical film 7 is 1%.
Example 8
This example is similar to example 5, except that the mass fraction of the conditioning particles in the formed optical film 8 is 3%.
Example 9
This example is similar to example 1 except that the center particle diameter of the conditioning particles in the formed optical film 9 is 18 μm, and the conditioning particles in the optical film 9 are obtained by sieving the same conditioning particles as in example 5 through a 1000 mesh screen, wherein the volume ratio of the conditioning particles having particle diameters of 0 to 13um, 13 to 18um, 18 to 20um, 20um or more is 10%, 44%, 36% and 10%, respectively.
Example 10
This example is similar to example 9, except that the mass fraction of the conditioning particles in the formed optical film 10 is 0.5%.
Example 11
This example is similar to example 9, except that the mass fraction of the conditioning particles in the formed optical film 11 is 1%.
Example 12
This example is similar to example 9, except that the mass fraction of the conditioning particles in the formed optical film 12 is 3%.
Example 13
The difference between this embodiment and embodiment 1 is that the adjusting particles in the optical film 13 are polystyrene spherical particles, the central particle diameter of the adjusting particles is 2 micrometers, the volume ratio of the particle diameters of the adjusting particles is 0-1 um, 1-2 um, 2-3 um and 3-40 um is 20%, 35% and 10%, respectively, and the mass fraction of the adjusting particles in the optical film 13 is 0.001%.
Example 14
This example is similar to example 13 except that the mass fraction of conditioning particles in the optical film 14 is 0.005%.
Example 15
This example is similar to example 13 except that the mass fraction of conditioning particles in the optical film 15 is 0.05%.
Example 16
This example is similar to example 13 except that the mass fraction of conditioning particles within the optical film 16 is 0.5%.
Example 17
This example is similar to example 13, except that the mass fraction of conditioning particles in the optical film 17 is 1%.
Example 18
This example is similar to example 13, except that the mass fraction of conditioning particles in the optical film 18 is 3%.
Example 19
The difference between this embodiment and embodiment 15 is that the center particle diameter of the adjustment particles in the optical film 19 is 2 μm, and the volume ratio of the adjustment particles is 5%, 45%, 5% respectively, with particle diameters of 0 to 1um, 1 to 2um, 2 to 3um, 3 to 40 um.
Example 20
This example is similar to example 19 except that the mass fraction of conditioning particles in the optical film 20 is 0.5%.
Example 21
This example is similar to example 19 except that the mass fraction of the conditioning particles in the optical film 21 is 1%.
Example 22
This example is similar to example 19, except that the mass fraction of conditioning particles in the optical film 22 is 3%.
Example 23
This example is similar to example 1, except that the conditioning particles in the optical film 23 are composed of calcium carbonate whiskers and spherical polystyrene mixed in a mass ratio of 50:50, wherein, the central grain diameter of the calcium carbonate whisker is 15 microns, and the volume ratio of the grain diameters of the calcium carbonate whisker to the calcium carbonate whisker is 20%, 30% and 20% respectively, wherein the volume ratio of the grain diameters of the calcium carbonate whisker is 5-10 um, 10-15 um, 15-20 um and 20-25 um; the spherical polystyrene has a central particle size of 2 microns and a particle size in the range of greater than 0 microns and less than or equal to 5 microns.
Example 24
This example is similar to example 23, except that the mass fraction of conditioning particles in the formed optical film 24 is 0.5%.
Example 25
This example is similar to example 23, except that the mass fraction of the conditioning particles in the formed optical film 25 is 1%.
Example 26
This example is similar to example 23, except that the mass fraction of conditioning particles in the formed optical film 26 is 3%.
Comparative example 1
This comparative example is similar to example 1 except that no conditioning particles are present to form a comparative optical film 1.
The optical films obtained in examples 1 to 26 and the comparative optical film obtained in comparative example 1 were disposed on the side of the polarizer remote from the display panel, and the polarizer was attached to the surface of a 75-inch liquid crystal display panel for rainbow line observation in front view and side view and further optical effect test, and the results are shown in table 1. The polarizer to be tested comprises a compensation layer, a polarizing layer, a protective layer, an optical film (or a contrast optical film) and a transparent hardening sublayer which are sequentially laminated.
The optical films obtained in examples 1 to 26, and the comparative optical film obtained in comparative example 1 were subjected to an Optipro-micro phase retardation measuring instrument of shimtech company to obtain in-plane retardation values, and the results are shown in table 1.
The light diffusion films obtained in examples 1 to 26 and the comparative optical film obtained in comparative example 1 were disposed on the side of the polarizer remote from the display panel, and the polarizer was attached to the surface of a 75-inch liquid crystal display panel for front and side rainbow observation, and the results are shown in table 1. Wherein, the observations are "obvious", "more obvious", "slight" indicating that the degree of the observed rainbow pattern is sequentially decreased, and "none" indicates that no rainbow pattern phenomenon is observed.
The haze was obtained by measurement with a haze measuring instrument NDH 7000.
Contrast is the ratio of the brightness in the white state to the brightness in the dark state of the display panel. In this test, the center luminance of the display panel in the white state and the center luminance of the display panel in the dark state were measured.
The transmittance is the ratio of the white state brightness to the light-emitting brightness of the backlight module.
The chromaticity viewing angle measurement is a viewing angle measurement performed in the CESI standard (CESI 0.03).
TABLE 1
As can be seen from the optical performance results of the optical films 1 to 26 and the comparative optical film 1 in table 1, the optical film obtained by adding the adjustment particles to the substrate effectively improved or even eliminated the rainbow pattern phenomenon, and improved the optical performance of the optical film; meanwhile, as can be seen from analysis of the optical performance results of the haze, transmittance, contrast, and the soxhlet viewing angle of the optical films 1 to 12 and 13 to 22, respectively, the overall improvement of the optical performance of the optical films is better as the particle diameters of the adjustment particles are concentrated toward the central particle diameter; finally, as can be seen from the optical performance results of the optical films 23 to 26, when the first type of adjustment particles and the second type of adjustment particles are simultaneously present in the optical film, the overall improvement effect of the optical performance of the optical film is superior to the case where only the first type of adjustment particles or only the second type of adjustment particles are present in the optical film.
The embodiment of the invention discloses an optical film, a polaroid and a display device, wherein the optical film comprises a substrate and regulating particles dispersed in the substrate, the regulating particles comprise first-type regulating particles and/or second-type regulating particles, the length-diameter ratio of the first-type regulating particles is greater than or equal to 1 and less than 5, the length-diameter ratio of the second-type regulating particles is greater than or equal to 5 and less than or equal to 50, the particle diameter value of the first-type regulating particles which is greater than or equal to 80% is in the range of 50-140% of the first central particle diameter value, and the particle diameter value of the second-type regulating particles which is greater than or equal to 80% is in the range of 50-140% of the second central particle diameter value; the invention controls the particle size distribution range of the adjusting particles to enable the particle size value of most adjusting particles to be close to the central particle size value, thereby improving the product stability of the optical film and improving the stability of the display device.
The above description of the optical film, the polarizer and the display device provided by the embodiments of the present invention has been presented in detail, and specific examples are applied herein to illustrate the principles and embodiments of the present invention, and the above description of the embodiments is only for helping to understand the method and core idea of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present invention, the present description should not be construed as limiting the present invention.
Claims (7)
1. An optical film, comprising:
a substrate;
adjusting particles dispersed within the substrate;
wherein the conditioning particles comprise a first type of conditioning particles and/or a second type of conditioning particles;
the first type of adjustment particles are provided with a plurality of first cross sections, each first cross section is provided with a first circumscribing circle, the ratio of the length of the long axis of the first type of adjustment particles to the first circumscribing circle with the largest diameter among the plurality of first circumscribing circles is larger than or equal to 1, and the ratio of the length of the long axis of the first type of adjustment particles to the diameter of the first circumscribing circle with the largest diameter among the plurality of first circumscribing circles is smaller than 5;
the second type of adjusting particles are provided with a plurality of second cross sections, each second cross section is provided with a second circumscribing circle, the ratio of the length of the long axis of the second type of adjusting particles to the diameter of the second circumscribing circle with the largest diameter among the plurality of second circumscribing circles is more than or equal to 5, and the ratio of the length of the long axis of the second type of adjusting particles to the diameter of the second circumscribing circle with the largest diameter among the plurality of second circumscribing circles is less than or equal to 50;
each first type of adjusting particle has a first particle size value, the first particle size values of all the first types of adjusting particles are distributed in a range, all the first types of adjusting particles correspond to a first central particle size value, and more than or equal to 80% of the first particle size values of the first types of adjusting particles are located in 50-140% of the first central particle size value range, and the first central particle size value is smaller than 20 microns;
Each second-class adjusting particle has a second particle size value, the second particle size values of all the second-class adjusting particles are distributed in a range, all the second-class adjusting particles correspond to a second central particle size value, more than or equal to 80% of the second particle size values of the second-class adjusting particles in all the second-class adjusting particles are located in 50-140% of the second central particle size value range, and the second central particle size value is smaller than 20 microns;
the first particle size value of each first type of adjusting particle is the same as the length of the long axis of each first type of adjusting particle, and the second particle size value of each second type of adjusting particle is the same as the length of the long axis of each second type of adjusting particle;
the optical film has an in-plane retardation value, the in-plane retardation value of the optical film being less than 3000 nanometers;
the optical film has a thickness direction retardation value, a ratio of an in-plane retardation value of the optical film to the thickness direction retardation value of the optical film is greater than 0.1, and a ratio of the in-plane retardation value of the optical film to the thickness direction retardation value of the optical film is less than 2.
2. The optical film of claim 1, wherein greater than or equal to 80% of all of the first type of conditioning particles have a first particle size value within 70% to 110% of the first center particle size value range; and/or the number of the groups of groups,
Of all the second-type adjustment particles, greater than or equal to 80% of the second-type adjustment particles have a second particle size value within 70% to 110% of the second center particle size value range.
3. The optical film according to claim 1, wherein the first type of adjustment particles are at least one selected from a first sub-type adjustment particle, a second sub-type adjustment particle, a third sub-type adjustment particle, a fourth sub-type adjustment particle, and a fifth sub-type adjustment particle having different shapes, and the second type of adjustment particles are at least one selected from a sixth sub-type adjustment particle, a seventh sub-type adjustment particle, an eighth sub-type adjustment particle, a ninth sub-type adjustment particle, and a tenth sub-type adjustment particle having different shapes;
wherein a variation value of a diameter of a first circumscribed circle of the first cross section of the first sub-class of adjustment particles is less than or equal to 0.3 micrometers along an extension direction of a long axis of the first sub-class of adjustment particles;
the first end of the second sub-class adjusting particle is connected with the second end of the second sub-class adjusting particle, the diameter of a first circumcircle of the first section positioned at the first end of the second sub-class adjusting particle gradually decreases along the direction away from the second end of the second sub-class adjusting particle, and the diameter of a first circumcircle of the first section positioned at the second end of the second sub-class adjusting particle gradually decreases along the direction away from the first end of the second sub-class adjusting particle;
A variation value of a diameter of a first circumcircle of the first section located at a middle portion of the third sub-class adjustment particle is less than or equal to 1 micron along an extending direction of a long axis of the third sub-class adjustment particle, and a variation value of a diameter of a first circumcircle of the first section located at a first end portion of the third sub-class adjustment particle is less than or equal to 1 micron along a direction away from the middle portion of the third sub-class adjustment particle;
a variation value of a diameter of a first circumscribed circle of the first section located at a middle portion of the fourth sub-class adjustment particle is less than or equal to 1 micrometer along an extending direction of a long axis of the fourth sub-class adjustment particle, a diameter of a first circumscribed circle of the first section located at a first end portion of the fourth sub-class adjustment particle is gradually reduced, and a diameter of a first circumscribed circle of the first section located at a second end portion of the fourth sub-class adjustment particle is gradually reduced along a direction away from the middle portion of the fourth sub-class adjustment particle;
the first end of the fifth sub-class adjusting particle is connected with the second end of the fifth sub-class adjusting particle, and the diameter of a first circumcircle of the first section of the fifth sub-class adjusting particle gradually decreases along the direction from the first end of the fifth sub-class adjusting particle to the second end of the fifth sub-class adjusting particle;
A variation value of a diameter of a second circumscribed circle of the second section of the sixth sub-class adjustment particle is less than or equal to 0.3 micrometers along an extension direction of a long axis of the sixth sub-class adjustment particle;
a variation value of a diameter of a second circumscribed circle of the second section located at a middle portion of the seventh sub-class adjustment particle is less than or equal to 1 micrometer along an extending direction of a long axis of the seventh sub-class adjustment particle, and a variation value of a diameter of a second circumscribed circle of the second section located at a first end portion of the seventh sub-class adjustment particle is less than or equal to 1 micrometer along a direction away from the middle portion of the seventh sub-class adjustment particle;
a variation value of a diameter of a second circumscribed circle of the second cross section located at a middle portion of the eighth sub-class adjustment particle is less than or equal to 1 μm along an extending direction of a long axis of the eighth sub-class adjustment particle, and a diameter of a second circumscribed circle of the second cross section located at a first end portion of the eighth sub-class adjustment particle is gradually reduced along a direction away from the middle portion of the eighth sub-class adjustment particle, and a diameter of a second circumscribed circle of the second cross section located at a second end portion of the eighth sub-class adjustment particle is gradually reduced;
The first end of the ninth sub-class adjustment particle is connected with the second end of the ninth sub-class adjustment particle, and the diameter of a second circumcircle positioned on the second section of the ninth sub-class adjustment particle gradually decreases along the direction from the first end of the ninth sub-class adjustment particle to the second end of the ninth sub-class adjustment particle;
the first end of the tenth sub-class adjusting particle is connected with the second end of the tenth sub-class adjusting particle, the diameter of the second circumscribed circle of the second section at the first end of the tenth sub-class adjusting particle is gradually reduced along the direction away from the second end of the tenth sub-class adjusting particle, and the diameter of the second circumscribed circle of the second section at the second end of the tenth sub-class adjusting particle is gradually reduced along the direction away from the first end of the tenth sub-class adjusting particle.
4. An optical film according to claim 3, wherein the first sub-class adjustment particles are selected from square or cuboid particles, the second sub-class adjustment particles are selected from spherical or ellipsoidal particles, the third sub-class light diffusion particles are selected from needle-shaped particles having a reduced diameter at one end, the fourth sub-class light diffusion particles are selected from needle-shaped particles having a reduced diameter at both ends, the fifth sub-class light diffusion particles are selected from long cone-shaped particles, the sixth sub-class adjustment particles are selected from rod-shaped particles, the seventh sub-class adjustment particles are selected from needle-shaped particles having a reduced diameter at one end, the eighth sub-class adjustment particles are selected from needle-shaped particles having a reduced diameter at both ends, the ninth sub-class adjustment particles are selected from long cone-shaped particles, and the tenth sub-class adjustment particles are selected from double cone-shaped particles or ellipsoidal particles.
5. The optical film according to claim 1, wherein the substrate comprises a first sub-substrate selected from at least one of an unmodified polyester, an unmodified acetate, and/or a second sub-substrate selected from at least one of a modified polyester, a modified cellulose acetate;
wherein the mass fraction of the first base material in the base material is more than or equal to 65%, and the mass fraction of the first base material in the base material is less than or equal to 100%;
the mass fraction of the second base material in the base material is greater than or equal to 0%, and the mass fraction of the second base material in the base material is less than or equal to 35%.
6. A polarizer comprising the optical film of any one of claims 1 to 5.
7. A display device comprising the polarizer of claim 6.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311236429.6A CN116973995B (en) | 2023-09-25 | 2023-09-25 | Optical film, polaroid and display device |
| CN202311861360.6A CN117970551A (en) | 2023-09-25 | 2023-09-25 | Optical film, polaroid and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311236429.6A CN116973995B (en) | 2023-09-25 | 2023-09-25 | Optical film, polaroid and display device |
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|---|---|---|---|
| CN202311861360.6A Division CN117970551A (en) | 2023-09-25 | 2023-09-25 | Optical film, polaroid and display device |
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| Publication Number | Publication Date |
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| CN116973995A CN116973995A (en) | 2023-10-31 |
| CN116973995B true CN116973995B (en) | 2024-01-05 |
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| CN202311236429.6A Active CN116973995B (en) | 2023-09-25 | 2023-09-25 | Optical film, polaroid and display device |
| CN202311861360.6A Pending CN117970551A (en) | 2023-09-25 | 2023-09-25 | Optical film, polaroid and display device |
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| CN202311861360.6A Pending CN117970551A (en) | 2023-09-25 | 2023-09-25 | Optical film, polaroid and display device |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018194741A (en) * | 2017-05-19 | 2018-12-06 | 大日本印刷株式会社 | Oriented film, and transparent conductive film, touch panel and display device using the same |
| CN116520465A (en) * | 2023-07-05 | 2023-08-01 | Tcl华星光电技术有限公司 | Light diffusion film, polaroid and display device |
-
2023
- 2023-09-25 CN CN202311236429.6A patent/CN116973995B/en active Active
- 2023-09-25 CN CN202311861360.6A patent/CN117970551A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018194741A (en) * | 2017-05-19 | 2018-12-06 | 大日本印刷株式会社 | Oriented film, and transparent conductive film, touch panel and display device using the same |
| CN116520465A (en) * | 2023-07-05 | 2023-08-01 | Tcl华星光电技术有限公司 | Light diffusion film, polaroid and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116973995A (en) | 2023-10-31 |
| CN117970551A (en) | 2024-05-03 |
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