CN117255957A - Polarizer, polarizing plate comprising same and optical display device comprising same - Google Patents
Polarizer, polarizing plate comprising same and optical display device comprising same Download PDFInfo
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- CN117255957A CN117255957A CN202280029716.7A CN202280029716A CN117255957A CN 117255957 A CN117255957 A CN 117255957A CN 202280029716 A CN202280029716 A CN 202280029716A CN 117255957 A CN117255957 A CN 117255957A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 32
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 108
- 239000010703 silicon Substances 0.000 claims abstract description 107
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 106
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 75
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 75
- 238000002834 transmittance Methods 0.000 claims description 71
- 229910052796 boron Inorganic materials 0.000 claims description 66
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 65
- -1 iodide ions Chemical class 0.000 claims description 10
- 239000002210 silicon-based material Substances 0.000 claims description 10
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 9
- 125000000217 alkyl group Chemical group 0.000 claims description 5
- 125000003700 epoxy group Chemical group 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 5
- 125000003396 thiol group Chemical group [H]S* 0.000 claims description 5
- 239000011241 protective layer Substances 0.000 description 31
- 239000010410 layer Substances 0.000 description 29
- 238000000034 method Methods 0.000 description 29
- 150000001875 compounds Chemical class 0.000 description 27
- 230000000052 comparative effect Effects 0.000 description 24
- 238000012937 correction Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 16
- 230000010287 polarization Effects 0.000 description 16
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 15
- 239000004327 boric acid Substances 0.000 description 15
- 238000004043 dyeing Methods 0.000 description 15
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 13
- 229910052740 iodine Inorganic materials 0.000 description 11
- 239000011630 iodine Substances 0.000 description 11
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 10
- 206010042674 Swelling Diseases 0.000 description 10
- 238000004132 cross linking Methods 0.000 description 10
- 239000000975 dye Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 230000008961 swelling Effects 0.000 description 10
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 238000004383 yellowing Methods 0.000 description 8
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000012790 adhesive layer Substances 0.000 description 5
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- HSZCZNFXUDYRKD-UHFFFAOYSA-M lithium iodide Chemical compound [Li+].[I-] HSZCZNFXUDYRKD-UHFFFAOYSA-M 0.000 description 4
- PHQOGHDTIVQXHL-UHFFFAOYSA-N n'-(3-trimethoxysilylpropyl)ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCN PHQOGHDTIVQXHL-UHFFFAOYSA-N 0.000 description 4
- 229910052724 xenon Inorganic materials 0.000 description 4
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 229920002284 Cellulose triacetate Polymers 0.000 description 2
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000006059 cover glass Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 2
- XMBWDFGMSWQBCA-UHFFFAOYSA-M iodide Chemical compound [I-] XMBWDFGMSWQBCA-UHFFFAOYSA-M 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000028161 membrane depolarization Effects 0.000 description 2
- 229920005672 polyolefin resin Polymers 0.000 description 2
- UAYWVJHJZHQCIE-UHFFFAOYSA-L zinc iodide Chemical compound I[Zn]I UAYWVJHJZHQCIE-UHFFFAOYSA-L 0.000 description 2
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 description 1
- 229920000106 Liquid crystal polymer Polymers 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- CECABOMBVQNBEC-UHFFFAOYSA-K aluminium iodide Chemical compound I[Al](I)I CECABOMBVQNBEC-UHFFFAOYSA-K 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000003666 anti-fingerprint Effects 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 239000012461 cellulose resin Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- GBRBMTNGQBKBQE-UHFFFAOYSA-L copper;diiodide Chemical compound I[Cu]I GBRBMTNGQBKBQE-UHFFFAOYSA-L 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000004993 emission spectroscopy Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 229910000043 hydrogen iodide Inorganic materials 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 229940006461 iodide ion Drugs 0.000 description 1
- 150000002496 iodine Chemical class 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- INJVFBCDVXYHGQ-UHFFFAOYSA-N n'-(3-triethoxysilylpropyl)ethane-1,2-diamine Chemical compound CCO[Si](OCC)(OCC)CCCNCCN INJVFBCDVXYHGQ-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920001230 polyarylate Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical class [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 235000009518 sodium iodide Nutrition 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5435—Silicon-containing compounds containing oxygen containing oxygen in a ring
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/544—Silicon-containing compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/548—Silicon-containing compounds containing sulfur
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
-
- 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
-
- 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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Polarising Elements (AREA)
Abstract
Provided are a polarizer, a polarizing plate including the same, and an optical display device including the same, the polarizer including 0.015 to 2wt% silicon and including at least a region having a ratio of formula 1 of 0.01 to 0.5.
Description
Technical Field
The invention relates to a polarizer, a polarizing plate comprising the same and an optical display device comprising the same.
Background
Polarizing plates are used in mobile optical display devices including mobile phones equipped with image sensors.
Referring to (a) of fig. 5, the optical display device may include: a display panel (50) including a base layer (51) and a plurality of light emitting devices (52); a polarizing plate (40) provided on the display panel (50); a cover glass (60) provided on the polarizing plate (40), and an image sensor (10) partially provided inside the display panel (50) by penetration. The image sensor (10) is also partially disposed inside the polarizing plate (40) by penetration. A region (40 a) of the polarizing plate (40) corresponding to the image sensor (10) is a non-display region. In order to secure a space for penetrating the image sensor (10), the polarizing plate (40) is processed by physical pressing (physical-polishing) or the like. However, light leakage may occur in the display region (40 b) due to foaming, cracks, etc. in the punched peripheral region of the polarizing plate (40), resulting in poor image quality.
Referring to (B) in fig. 5, the polarizing plate (70) may have a region (70 a) formed by a chemical or optical method (instead of punching as shown in the polarizing plate (40)) for enabling operation of the image sensor (10) and a screen image display region (70B). However, the image sensor (10) penetrates into the display panel (50) including the light emitting device, and thus this structure has a problem in that: separation of the display panel (50) including the light emitting device is unavoidable due to the image sensor (10), thereby causing difficulty in processing the optical display device.
Unlike the conventional optical display device in which a display panel including a light emitting device is processed by punching to secure a space for penetration of an image sensor as shown in fig. 5 (a) or 5 (B), the recent optical display device has an image sensor disposed at an upper side of the display panel instead of penetrating into the inside of the display panel and a polarizing plate. Here, an area of the polarizing plate corresponding to the image sensor is also required to realize a screen image display function, a function of preventing the image sensor from being visible during operation (running) of the screen image display function, and a function of enhancing image sharpness during capturing of an image by the image sensor. For this reason, a method of forming a region having a high total transmittance in a polarizing plate by an optical process has been proposed.
The background of the present invention is disclosed in Japanese unexamined patent publication No. 2014-081482 and the like.
Disclosure of Invention
Technical problem
An object of the present invention is to provide a polarizer or polarizing plate having good reliability at high temperature.
It is another object of the present invention to provide a polarizer or polarizing plate that does not have or minimizes yellowing and allows the localized formation of high light transmittance regions therein.
It is a further object of the present invention to provide a polarizer or polarizing plate that allows a region having a light transmittance of 80% or more to be locally formed.
It is still another object of the present invention to provide a polarizer or polarizing plate capable of preventing an image sensor from being visible when the image sensor is disposed at the lower side of the polarizing plate, while achieving a clear image when capturing an image using the image sensor.
Technical proposal
One aspect of the present invention relates to a polarizer.
1. The polarizer includes at least a region having a silicon (Si) content of 0.015wt% to 2wt% and a ratio of equation 1 in a range of 0.01 to 0.5:
[ equation 1]
Ratio = [ silicon content ]/[ silicon content+boron content ]
(in the equation 1,
The silicon content is the content of silicon (Si) in the region (unit: wt%), and
the boron content is the content of boron (B) in the region (unit: wt%)).
2. In 1, the region may have a boron content of 0.1wt% to 5 wt%.
3. In 1-2, the region may be the entire surface of the polarizer.
4. In 1-3, the region may include: a hydroxyl group-containing polyvinyl alcohol film and a silicon-containing compound containing an alkoxysilane group bonded to a hydroxyl group.
5. In 4, the silicon-containing compound containing an alkoxysilane group may include at least one selected from the group consisting of: an alkoxysilane containing at least one epoxy group, an alkoxysilane containing at least one nitrogen atom, an alkoxysilane containing at least one alkyl group, an alkoxysilane containing at least one mercapto group, and an alkoxysilane containing at least one unsaturated group.
6. In 1-5, the polarizer may include a second region including the region; and a first region having a higher total transmittance than the second region.
7. In 6, the first region may have a silicon content of 0.015wt% to 2wt% and a ratio of equation 2 in the range of 0.01 to 0.5:
[ equation 2]
Ratio = [ silicon content ]/[ silicon content+boron content ]
(in the equation 2,
the silicon content is the content of silicon (Si) in the first region (unit: wt%), and
the boron content is the content of boron (B) in the first region (unit: wt%)).
8. In 7, the first region may have a boron content of 0.1wt% to 5 wt%.
9. In 6, the first region may have a total transmittance of 80% or more, -a color value as of 7 to 0, and a color value bs of 0 to 25.
10. In 6, the first region may have a total transmittance of 60% or more at a wavelength of 450 nm.
11. In 6, the first region may include: a hydroxyl group-containing polyvinyl alcohol film and a silicon-containing compound containing an alkoxysilane group bonded to a hydroxyl group.
12. In 11, the silicon-containing compound containing an alkoxysilane group may include at least one selected from the group consisting of: an alkoxysilane containing at least one epoxy group, an alkoxysilane containing at least one nitrogen atom, an alkoxysilane containing at least one alkyl group, an alkoxysilane containing at least one mercapto group, and an alkoxysilane containing at least one unsaturated group.
13. In 6, the first region may have a different concentration profile of iodide ions (concentration profile) than the second region.
14. In 6, the second region may have a total transmittance of 40% to less than 50%.
Another aspect of the present invention is a polarizing plate.
15. The polarizing plate includes a polarizer and a protective layer stacked on at least one surface of the polarizer, wherein the polarizer includes the polarizer according to the present invention.
16. In 15, the polarizing plate may include: a first polarizing plate region having a total transmittance of 80% or more, -a color value as of 7 to 0, and a color value bs of 0 to 25; and a second polarizing plate region having a lower total transmittance than the first polarizing plate region.
17. In 15-16, the first polarizing plate region may have a silicon (Si) content of 0.015wt% to 2wt% and a [ silicon content ]/[ silicon content+boron content ] ratio of 0.01 to 0.5.
18. In 15-17, the second polarizing plate region may have a silicon (Si) content of 0.015wt% to 2wt% and a [ silicon content ]/[ silicon content+boron content ] ratio of 0.01 to 0.5.
Another aspect of the invention is an optical display device.
The optical display device according to the present invention includes the polarizing plate according to the present invention.
The optical display device may include: the display device includes a display panel, a polarizing plate disposed on an upper side of the display panel, and an image sensor disposed on a lower side of the display panel, wherein the image sensor is disposed on a lower side of a first region of the polarizing plate.
Advantageous effects
The present invention provides a polarizer or polarizing plate having good reliability at high temperature.
The present invention provides a polarizer or polarizing plate that does not or minimizes yellowing and allows high light transmittance regions to be locally formed therein.
The present invention provides a polarizer or polarizing plate that allows a region having a light transmittance of 80% or more to be locally formed.
The present invention provides a polarizer or polarizing plate capable of preventing an image sensor from being visible when the image sensor is disposed at the lower side of the polarizing plate, while realizing a clear image when capturing an image using the image sensor.
Drawings
FIG. 1 is a plan view of a polarizer according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a polarizer according to an embodiment of the present invention.
Fig. 3 is a sectional view of a polarizing plate according to one embodiment of the present invention.
Fig. 4 is a cross-sectional view of an optical display device according to an embodiment of the present invention.
Fig. 5 is a sectional view of a conventional optical display device.
Fig. 6 is a graph depicting the total transmittance (Y axis, unit:%) of the first polarizing plate region of the polarizing plates of example 5 and comparative example 1 as a function of wavelength (X axis, unit: nm).
Fig. 7 shows enlarged images of the first polarizing plate region and the second polarizing plate region of the polarizing plates of example 5 and comparative example 1. (A) An enlarged image of the polarizing plate of example 5 is shown, and (B) an enlarged image of the polarizing plate of comparative example 1 is shown. In (a) and (B), the elliptical portion corresponds to a first polarizing plate region, and the black portion corresponds to a second polarizing plate region.
Detailed Description
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. It should be understood that the present invention may be implemented in various ways and is not limited to the following embodiments.
In the drawings, portions irrelevant to the description will be omitted for clarity. Throughout the specification, like components will be denoted by like reference numerals. It should be noted that the figures are not drawn to precise scale and that the length or size of the components may be exaggerated for descriptive convenience and clarity only.
Spatially relative terms, such as "upper" and "lower," are defined herein with reference to the figures. Thus, it should be understood that "upper surface" may be used interchangeably with "lower surface".
Herein, the "silicon (Si) content" and the "boron (B) content" are the content of silicon (Si) and the content of boron (B) in an elemental state (elemental state) in a region of a polarizer or a polarizing plate, respectively. The silicon (Si) content and the boron (B) content were measured on the region of the polarizer or polarizing plate by inductively coupled plasma emission spectrometry (ICP-OES). Measurement of the elemental content by ICP-OES can be performed by typical methods known to those skilled in the art. Herein, the "silicon (Si) content" and the "boron (B) content" are values representing the content ratio of silicon and the content ratio of boron by weight (i.e., in wt%) in the region of the polarizer or polarizing plate, respectively.
Herein, "as" and "bs" are color values in regions of a polarizer or polarizing plate, respectively, and refer to color values a and b in the CIE coordinate system, respectively. The color values a and b may be obtained from the CIE coordinate system, where the x-axis indicating the a-value is orthogonal to the y-axis indicating the b-value. The color value a turns red as the absolute value increases in the positive direction and green as the absolute value increases in the negative direction. The color value b turns yellow as the absolute value increases in the positive direction and turns blue as the absolute value increases in the negative direction. The color values a and b measured for a single polarizer or a single polarizing plate are referred to as color value as and color value bs, respectively, and the color values a and b measured for two polarizers or two polarizing plates disposed orthogonally (cross) to each other are referred to as color value ac and color value bc, respectively. The color values can be measured using a UV-visible spectrophotometer (V-7100, JASCO) at wavelengths from 380nm to 780 nm.
As used herein, "total transmittance (Ts)", "orthogonal transmittance (crossed transmittance) (Tc)" and "polarization degree" are values measured at wavelengths of 380nm to 780nm and subjected to visibility correction. These values can be measured using a UV-visible spectrophotometer (V-7100, JASCO).
Herein, with respect to "total transmittance of the first region", the first region has the same total transmittance in the entire region thereof at the same wavelength. However, when the total transmittance is different in the entire region of the first region at the same wavelength, the total transmittance of the first region refers to the average total transmittance thereof.
Herein, with respect to "total transmittance of the second region", the second region has the same total transmittance in the entire region thereof at the same wavelength. However, when the total transmittance is different in the entire region of the second region at the same wavelength, the total transmittance of the second region refers to the average total transmittance thereof.
As used herein, "average total transmittance" refers to the average of the total transmittance over the wavelength range of the average total transmittance to be measured. For example, the average total transmittance may be obtained from an average value of the total transmittance at any specified plurality of points in the region where the average total transmittance is to be measured.
As used herein, "X to Y" representing a particular numerical range means "greater than or equal to X and less than or equal to Y (X.ltoreq.and.ltoreq.Y)".
The present invention provides a polarizer or polarizing plate having good reliability at high temperature and including at least one region in which a first region having a total transmittance of 80% or more and having no or minimized yellowing is to be formed.
In one embodiment, the polarizer or polarizing plate may have a total transmittance change of 3% or less (e.g., 0% to 1%) calculated according to equation 4. Within this range, the polarizer or polarizing plate may have good reliability at high temperature to extend the life of the optical display device.
[ equation 4]
Total transmittance change= |t1-t2|
(in equation 4, T1 is the initial total transmittance (unit:%) of the polarizer or polarizing plate, and
t2 is the total transmittance (in%) of the polarizer or polarizing plate measured after the polarizer or polarizing plate is left at 85℃for 48 hours.
When the first region has a total transmittance of 80% or more and does not yellow or minimizes yellow, the first region may ensure color clarity (color clarity) of an image observed therethrough.
In one embodiment, the first region may have a color value as of-7 to 0 (specifically, -1 to 0) and a color value bs of 0 to 25 (specifically, 0 to 3). Within this range, the first region can ensure the color definition of the image observed therethrough.
[ Polaroid ]
The polarizer according to the present invention includes at least a region having a silicon (Si) content of 0.015wt% to 2wt% and a ratio of equation 1 in the range of 0.01 to 0.5:
[ equation 1]
Ratio = [ silicon content ]/[ silicon content+boron content ]
(in the equation 1,
the silicon content is the content of silicon (Si) in the region (unit: wt%), and
the boron content is the content of boron (B) in the region (unit: wt%)).
Hereinafter, a polarizer according to an embodiment of the present invention will be described.
The polarizer includes at least a region having a silicon content of 0.015wt% to 2wt% and a ratio of 0.01 to 0.5 calculated according to equation 1. When the region satisfies both the silicon content and the ratio of equation 1 in the range of 0.01 to 0.5, the region exhibits good reliability at high temperature, and when the first region is formed in the region by the method described below, the first region having a total transmittance of 80% or more and no or minimized yellowing is achieved.
The inventors of the present invention confirmed that when the region does not satisfy any of the silicon content and the ratio of equation 1 in the range of 0.01 to 0.5, the region exhibits poor reliability at high temperature and the first region cannot be realized. An aspect of the present invention is to improve reliability of a polarizer or polarizing plate at high temperature, and form a first region having a total transmittance of 80% or more and no or minimized yellowing in the polarizer by controlling silicon content and boron content when formed by the following method.
In one embodiment, the region may have a specific 0.015wt%, 0.05wt%, 0.1wt%, 0.15wt%, 0.2wt%, 0.25wt%, 0.3wt%, 0.35wt%, 0.4wt%, 0.45wt%, 0.5wt%, 0.55wt%, 0.6wt%, 0.65wt%, 0.7wt%, 0.75wt%, 0.8wt%, 0.85wt%, 0.9wt%, 0.95wt%, 1wt%, 1.05wt%, 1.1wt%, 1.15wt%, 1.2wt%, 1.25wt%, 1.3wt%, 1.35wt%, 1.4wt%, 1.45wt%, 1.5wt%, 1.55wt%, 1.6wt%, 1.65wt%, 1.7wt%, 1.75wt%, 1.8wt%, 1.85wt%, 1.9wt%, 1.95wt% or 2wt% (e.g., 0.1.1 wt% to 2wt%, e.g., 0.2wt% silicon content of 0.2 wt%). Within this range, the region can easily provide the above effect while satisfying the ratio of equation 1.
In one embodiment, the region may have a ratio of 0.01 to 0.45 (specifically, 0.01, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, or 0.5, for example, 0.05 to 0.4 or 0.05 to 0.35) calculated according to equation 1. Within this range, the region can easily provide the above effects while satisfying the silicon content range.
In one embodiment, the region may have 0.1wt% to 5wt% (specifically 0.1wt%, 0.2wt%, 0.3wt%, 0.4wt%, 0.5wt%, 0.6wt%, 0.7wt%, 0.8wt%, 0.9wt%, 1wt%, 1.1wt%, 1.2wt%, 1.3wt%, 1.4wt%, 1.5wt%, 1.6wt%, 1.7wt%, 1.8wt%, 1.9wt%, 2wt%, 2.1wt%, 2.2wt%, 2.3wt%, 2.4wt%, 2.5wt%, 2.6wt%, 2.7wt%, 2.8wt%, 2.9wt%, 3wt%, 3.1wt%, 3.2wt%, 3.3wt%, 3.4wt%, 3.5wt%, 3.6wt%, 3.7wt%, 3.8wt%, 3.9wt%, 4wt%, 4.1wt%, 4.2wt%, 4.3.3 wt%, 4.3wt%, 4.3.3 wt%, 4.5wt%, or 4.5wt% to 4.5wt%, or 4.5wt% of boron content of 0.5wt% to 3.5 wt%. Within this range, the region can easily provide the above effect while satisfying the ratio of equation 1.
In one embodiment, the region may be the entire surface (region) of the polarizer. In another embodiment, the region may be a portion of a polarizer, such as the first region described below. In yet another embodiment, the region may be a portion of a polarizer, such as a second region described below.
The silicon content in the region and the ratio of equation 1 may be achieved in the process of manufacturing the polarizer. This will be described in detail below.
In one embodiment, the polarizer includes a first region and a second region, wherein the first region has a higher total transmittance than the second region at the same wavelength, and at least one of the first region and the second region may be a region having a silicon content of 0.015wt% to 2wt% and a [ silicon content ]/[ silicon content+boron content ] ratio of 0.01 to 0.5.
The entirety of the first region and the second region may constitute a screen image display region of the polarizer. Here, the "screen image display area" refers to an area in which a screen image is displayed on an optical display device provided with a polarizer. The screen image display area may occupy 90% to 100%, preferably 100% of the total area of the polarizer in terms of area ratio. In one embodiment, the polarizing plate may not include a non-display region. Here, the "non-display area" refers to an area that is formed around the periphery of the screen image display area and has a light-shielding layer (light-shielding layer) or the like to prevent the bezel, the electrode, or the like from being visible.
In one embodiment, the first region is not punched and may be integrally formed with the second region. That is, the first region is not a hole formed in the polarizer by punching, and may include a polyvinyl alcohol film and may be integrally formed with the second region.
Referring to fig. 1 and 2, the polarizer will be described in more detail. Fig. 1 is a plan view of a polarizer according to an embodiment of the present invention, and fig. 2 is a cross-sectional view of a polarizer according to an embodiment of the present invention.
Referring to fig. 1 and 2, the polarizer (110) may include a light transmission region (113), the light transmission region (113) including a first region (111) and a second region (112).
The light transmission region (113) may include an upper surface of the polarizer (110), a lower surface of the polarizer (110), and a side surface of the polarizer (110) connecting the upper surface of the polarizer (110) to the lower surface thereof.
The polarizer (110) may be applied to an optical display device including an image sensor (e.g., a camera, etc.) disposed in a screen image display area.
In one embodiment, in an optical display device in which an image sensor, a panel including a light emitting device, and a polarizing plate are sequentially stacked, and the polarizing plate includes at least an area for simultaneously implementing a screen image display function and an image capturing function, a polarizer (110) may be included in the polarizing plate. Here, when the image sensor is not used, the polarizer is required to suppress observation of the image sensor from outside the optical display device by reducing the visibility of the image sensor, allowing the screen image display function to be appropriately realized. In addition, when an image sensor is used, a polarizer is required to allow an image capturing function to be achieved by the image sensor by improving the definition of a screen image.
The first region (111) may have a total transmittance of 80% or higher (specifically, 80%, 85%, 90%, 95% or 100%, for example, 80% to 95% or 85% to 95%); -a color value as of 7 to 0 (in particular, -7, -6.5, -6, -5.5, -5, -4.5, -4, -3.5, -3, -2.5, -2, -1.5, -1 or-0.5, 0, e.g., -1 to 0); and a color value bs of 0 to 25 (specifically 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25, for example, 0 to 3).
By satisfying the total transmittance, the color value as, and the color value bs within the above ranges, the first region (111) can effectively realize a screen image display function and an image capturing function. The total transmittance, color value as and color value bs of the first region (111) are set to allow the screen image display function and the image capturing function of the optical display device to be simultaneously realized.
In one embodiment, the first region (111) may have a silicon (Si) content of 0.015wt% to 2wt% and a ratio of equation 2 in the range of 0.01 to 0.5. Within this range, the first region can easily reach the total transmittance, color value as, and color value bs within the above ranges:
[ equation 2]
Ratio = [ silicon content ]/[ silicon content+boron content ]
(in the equation 2,
the silicon content is the content of silicon (Si) in the first region (unit: wt%), and
the boron content is the content of boron (B) in the first region (unit: wt%)).
In one embodiment, the first region may have a specific 0.015wt%, 0.05wt%, 0.1wt%, 0.15wt%, 0.2wt%, 0.25wt%, 0.3wt%, 0.35wt%, 0.4wt%, 0.45wt%, 0.5wt%, 0.55wt%, 0.6wt%, 0.65wt%, 0.7wt%, 0.75wt%, 0.8wt%, 0.85wt%, 0.9wt%, 0.95wt%, 1wt%, 1.05wt%, 1.1wt%, 1.15wt%, 1.2wt%, 1.25wt%, 1.3wt%, 1.35wt%, 1.4wt%, 1.45wt%, 1.5wt%, 1.55wt%, 1.6wt%, 1.65wt%, 1.7wt%, 1.75wt%, 1.8wt%, 1.85wt%, 1.9wt%, 1.95wt% or 2wt% (e.g., 0.1.1 wt% to 2wt%, e.g., 0.2wt% silicon content of 0.2 wt%). Within this range, the first region can easily provide the above effect while satisfying the ratio of equation 2.
In one embodiment, the first region may have a ratio of specifically 0.01, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, or 0.5 (e.g., 0.01 to 0.45, e.g., 0.05 to 0.4, or 0.05 to 0.35) as calculated according to equation 2. Within this range, the first region can easily provide the above effects while satisfying the silicon content within the above range.
In one embodiment, the first region may have 0.1wt% to 5wt% (specifically, 0.1wt%, 0.2wt%, 0.3wt%, 0.4wt%, 0.5wt%, 0.6wt%, 0.7wt%, 0.8wt%, 0.9wt%, 1wt%, 1.1wt%, 1.2wt%, 1.3wt%, 1.4wt%, 1.5wt%, 1.6wt%, 1.7wt%, 1.8wt%, 1.9wt%, 2wt%, 2.1wt%, 2.2wt%, 2.3wt%, 2.4wt%, 2.5wt%, 2.6wt%, 2.7wt%, 2.8wt%, 2.9wt%, 3wt%, 3.1wt%, 3.2wt%, 3.3wt%, 3.4wt%, 3.5wt%, 3.6wt%, 3.7wt%, 3.8wt%, 3.9wt%, 4wt%, 4.1wt%, 4.2wt%, 4.3.3 wt%, 4.3wt%, 4.3.3 wt%, 4.5wt%, or 4.5wt% to 4.5wt%, or 4.5wt% of boron content of 0.5wt% to 4.5wt%, or 0.5 wt%. Within this range, the first region can easily provide the above effect while satisfying the ratio of equation 2.
In one embodiment, the first region (111) may have a total transmittance of 60% or more (specifically, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95% or 100%, for example, 60% to 95% or 70% to 90%) at a wavelength of 450 nm. Within this range, the effects of the present invention can be effectively achieved.
The first region (111) may be derived from a region having a silicon content of 0.015wt% to 2wt% and a ratio of equation 1 in the range of 0.01 to 0.5. The method of forming the first region (111) will be described in more detail below.
At the same wavelength, the first region (111) may have a higher total transmittance than the second region (112). Although the first region and the second region each implement a screen image display function, the first region may also implement an image capturing function of an image sensor (such as a camera) unlike the second region. The second region cannot realize the image capturing function.
The first region (111) may have a different concentration profile of iodide ions than the second region (112). For example, the first region (111) may have a higher iodide ion (I) than the second region (112) - 、I 3- Etc.) concentration.
The first region (111) may have any shape of cross-section (cross-section), without limitation. For example, the first region (111) may have a closed curved shape or a closed polygonal shape, such as a circular, semi-circular, elliptical, semi-elliptical, polygonal, or amorphous shape.
The second region (112) implements only a screen image display function and is independent of an image capturing function of an image sensor of the optical display device. In one embodiment, the second region (112) may have a total transmittance of 40% to less than 50% (specifically, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49% or 49.9%, e.g., 40% to 45%). Within this range, the second region (112) can appropriately realize a screen image display function.
At the same wavelength, the second region (112) may have a higher degree of polarization than the first region (111). Although the first region (111) implements both the screen image display function and the image capturing function, the second region (112) may implement only the screen image display function and may not implement the image capturing function.
In one embodiment, the second region (112) may have a degree of polarization of 90% or more (specifically, 90% to 100%). Within this range, the second region may have an antireflection effect on external light. In one embodiment, the first region (111) may have a degree of polarization of 0.1% to 85% (specifically, 0.1%, 0.55, 1%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80% or 85%, for example, 0.1% to 75% or 0.1% to 20%). Within this range, the first region can be prevented from interfering with object recognition by the camera.
The second region (112) may have the same or different silicon (Si) content as the first region (111). The second region (112) may have the same or different [ silicon content ]/[ silicon content+boron content ] ratio as the first region (111). Preferably, the second region (112) has substantially the same silicon content and substantially the same [ silicon content ]/[ silicon content+boron content ] ratio as the first region (111), thereby facilitating a process of manufacturing a polarizer including the first region (111) and the second region (112).
In one embodiment, the second region (112) may have a silicon (Si) content of 0.015wt% to 2wt% and a ratio of equation 3 in the range of 0.01 to 0.5. Within this range, the second region (112) may exhibit good reliability at high temperatures.
[ equation 3]
Ratio = [ silicon content ]/[ silicon content+boron content ]
(in the equation 3,
the silicon content is the content of silicon (Si) in the second region (unit: wt%), and
the boron content is the content of boron (B) in the second region (unit: wt%)).
In one embodiment, the second region may have a specific 0.015wt%, 0.05wt%, 0.1wt%, 0.15wt%, 0.2wt%, 0.25wt%, 0.3wt%, 0.35wt%, 0.4wt%, 0.45wt%, 0.5wt%, 0.55wt%, 0.6wt%, 0.65wt%, 0.7wt%, 0.75wt%, 0.8wt%, 0.85wt%, 0.9wt%, 0.95wt%, 1wt%, 1.05wt%, 1.1wt%, 1.15wt%, 1.2wt%, 1.25wt%, 1.3wt%, 1.35wt%, 1.4wt%, 1.45wt%, 1.5wt%, 1.55wt%, 1.6wt%, 1.65wt%, 1.7wt%, 1.75wt%, 1.8wt%, 1.85wt%, 1.9wt%, 1.95wt% or 2wt% (e.g., 0.1.1 wt% to 2wt%, e.g., 0.2wt% silicon content of 0.2 wt%). Within this range, the second region can easily provide the above effect while satisfying the ratio of equation 3.
In one embodiment, the second region may have a ratio of specifically 0.01, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, or 0.5 (e.g., 0.01 to 0.45, e.g., 0.05 to 0.4, or 0.05 to 0.35) as calculated according to equation 3. Within this range, the second region can easily provide the above effects while satisfying the silicon content within the above range.
In one embodiment, the second region may have 0.1wt% to 5wt% (specifically 0.1wt%, 0.2wt%, 0.3wt%, 0.4wt%, 0.5wt%, 0.6wt%, 0.7wt%, 0.8wt%, 0.9wt%, 1wt%, 1.1wt%, 1.2wt%, 1.3wt%, 1.4wt%, 1.5wt%, 1.6wt%, 1.7wt%, 1.8wt%, 1.9wt%, 2wt%, 2.1wt%, 2.2wt%, 2.3wt%, 2.4wt%, 2.5wt%, 2.6wt%, 2.7wt%, 2.8wt%, 2.9wt%, 3wt%, 3.1wt%, 3.2wt%, 3.3wt%, 3.4wt%, 3.5wt%, 3.6wt%, 3.7wt%, 3.8wt%, 3.9wt%, 4wt%, 4.1wt%, 4.2wt%, 4.3wt%, 4.4wt%, 4.5wt%, for example, 0.5 to 4wt%, 1.0 to 3.5wt%, or 1.5 to 3 wt%) of boron (B). Within this range, the second region can easily provide the above effect while satisfying the ratio of equation 3.
The polarizer (110) may have a thickness of about 3 μm to about 50 μm (specifically, about 3 μm to about 30 μm). Within this range, the polarizer (110) may be used in a polarizing plate.
Next, a method of manufacturing a polarizer according to an embodiment of the present invention will be described.
The polarizer may be manufactured by a method comprising the steps of: preparing a polyvinyl alcohol-based film dyed with at least one dichroic material selected from iodine and a dichroic dye and stretched, and forming a first region by performing a predetermined treatment on a portion of the polyvinyl alcohol-based film. Here, the region of the polyvinyl alcohol film where the above treatment is not performed becomes the second region.
First, a step of preparing a polyvinyl alcohol-based film dyed with at least one dichroic material selected from iodine and a dichroic dye and stretched will be described. The polyvinyl alcohol-based film prepared by this step may include at least a region having the above silicon content and the ratio of equation 1 in the range of 0.01 to 0.5.
Hereinafter, a method of preparing a dyed and stretched polyvinyl alcohol-based film and a method of forming a region having the above silicon content and a ratio of equation 1 in the range of 0.01 to 0.5 will be sequentially described.
Dyed and stretched polyvinyl alcohol films can be prepared by dyeing and stretching polyvinyl alcohol films. In the manufacture of the polarizer, dyeing and stretching are not limited to a specific order. That is, the polyvinyl alcohol-based film may be sequentially dyed and stretched, or vice versa, or may be simultaneously dyed and stretched.
The polyvinyl alcohol film may include any typical polyvinyl alcohol film commonly used for manufacturing polarizers. Specifically, the polyvinyl alcohol-based film may be a film formed of polyvinyl alcohol or a derivative thereof. The polyvinyl alcohol or derivative thereof may have a degree of polymerization of about 1000 to about 5000 and a degree of saponification of about 80mol% to about 100 mol%. The polyvinyl alcohol-based film may have a thickness of about 1 μm to about 30 μm (specifically, about 3 μm to about 30 μm). Within these ranges, the polyvinyl alcohol film may be used to manufacture a thin polarizer.
Prior to dyeing and stretching, the polyvinyl alcohol film may be washed and swollen with water. By washing the polyvinyl alcohol film with water, foreign matter on the surface of the polyvinyl alcohol film can be removed. By swelling the polyvinyl alcohol film, the polyvinyl alcohol film can be dyed or stretched more effectively. Here, swelling may be performed by immersing the polyvinyl alcohol-based film in a swelling bath containing an aqueous solution, as is well known to those skilled in the art. The temperature of the swelling bath and the duration of the swelling treatment are not limited by specific conditions. The swelling bath may further contain boron, boric acid, inorganic acids, surfactants, etc., and the content thereof may be adjusted as needed.
Dyeing of the polyvinyl alcohol film may be performed by immersing the polyvinyl alcohol film in a dyeing bath containing at least one dichroic material selected from iodine and dichroic dyes. In the dyeing process, the polyvinyl alcohol-based film may be immersed in a dyeing solution, which may be an aqueous solution containing iodine or a dichroic dye. Specifically, iodine may be provided in the form of an iodine-based dye, and the iodine-based dye may include at least one selected from the group consisting of potassium iodide, hydrogen iodide, lithium iodide, sodium iodide, zinc iodide, lithium iodide, aluminum iodide, lead iodide, and copper iodide. The dyeing solution may be an aqueous solution of about 1wt% to about 5wt% of at least one selected from iodine and a dichroic dye. Within this range, the polarizer may have a polarization degree within the ranges specified herein, and thus may be used in an optical display device.
The dyeing bath may have a temperature of about 20 ℃ to about 45 ℃, and the polyvinyl alcohol-based film may be immersed in the dyeing bath for about 10 seconds to about 300 seconds. Within these ranges, a polarizer having a high degree of polarization can be obtained.
By stretching a polyvinyl alcohol-based film in a stretching bath, the polyvinyl alcohol-based film can exhibit polarization by orientation of at least one selected from iodine and a dichroic dye. Specifically, stretching of the polyvinyl alcohol film may be performed by any one of dry stretching and wet stretching. Dry stretching may be achieved by inter-roll stretching, compression stretching, heated roll stretching, etc., and wet stretching may be performed in a wet stretching bath containing water at about 35 ℃ to about 65 ℃. The wet stretching bath may also contain boric acid to enhance the stretching effect.
The polyvinyl alcohol-based film may be stretched to a predetermined elongation. Specifically, the polyvinyl alcohol-based film may be stretched to a total elongation of about 5 to about 7 times (specifically, about 5.5 to about 6.5 times) its original length. Within this elongation range, it is possible to prevent tearing or wrinkling of the polyvinyl alcohol-based film during stretching while realizing a polarizer having improved polarization degree and transmittance. Here, the polyvinyl alcohol-based film may be uniaxially stretched and may be stretched by uniaxial stretching, thereby allowing not only single-stage stretching but also multi-stage stretching (such as two-stage stretching, three-stage stretching, etc.), thereby enabling the production of a thin polarizer without breaking.
Although the polyvinyl alcohol-based film is stretched after dyeing in the above description, dyeing and stretching may be performed in the same reaction bath.
The polyvinyl alcohol film may be subjected to a crosslinking treatment in a crosslinking bath before or after stretching the dyed polyvinyl alcohol film. The crosslinking treatment is a process that allows at least one selected from iodine and dichroic dyes to be more firmly deposited on the polyvinyl alcohol-based film, and the process may be performed using boron, boric acid, or the like as a crosslinking agent. In order to enhance the crosslinking effect, the crosslinking bath may further contain a phosphoric acid compound, potassium iodide, or the like. The crosslinking bath may have a temperature of about 20 ℃ to about 45 ℃, and the polyvinyl alcohol-based film may be immersed in the crosslinking bath for about 10 seconds to about 300 seconds.
The dyed and stretched polyvinyl alcohol film may be color corrected in a color correction bath. In the color correction treatment, the dyed and stretched polyvinyl alcohol-based film is immersed in a color correction bath filled with a color correction solution containing potassium iodide. As a result, by removing iodine anion I - The polarizer may have improved durability. Color correction bath lotionTo have a temperature of about 20 ℃ to about 45 ℃ and the polyvinyl alcohol film may be immersed in the color correction bath for about 10 seconds to about 300 seconds. The color correction liquid may contain boron, boric acid, potassium iodide, or the like.
The dyed and stretched polyvinyl alcohol film may be cleaned and washed with water to remove foreign materials or used materials (used materials) from the surface of the polyvinyl alcohol film. Cleaning or washing may be carried out by typical methods known to those skilled in the art.
The dyed and stretched polyvinyl alcohol film may be dried. Drying may be carried out by typical methods known to those skilled in the art. For example, the film may be dried at about 60 ℃ to about 90 ℃ for about 1 minute to about 5 minutes. Drying may include, but is not limited to, hot air drying, and the like.
In preparing the dyed and stretched polyvinyl alcohol-based film, a region having the above silicon content and a ratio of equation 1 in the range of 0.01 to 0.5 can be achieved by adjusting the content of the boron (B) containing compound and the content of the silicon (Si) containing compound.
The boron (B) containing compound includes boron, and may include a compound to be used for penetrating boron to the surface and/or inside of the polyvinyl alcohol-based film in the process of preparing the dyed and stretched polyvinyl alcohol-based film. For example, the boron (B) -containing compound may contain at least one selected from boric acid and boron. Preferably, the boron (B) containing compound may be boric acid.
At least one type of boron (B) containing compound may be used in at least one process for preparing dyed and stretched polyvinyl alcohol based films. In one embodiment, the boron (B) containing compound may be added to the swelling bath in an amount of about 0M to about 0.1M, preferably in an amount of greater than about 0M to about 0.05M. In another embodiment, the boron (B) containing compound may be added to the dyeing bath in an amount of about 0M to about 0.1M, preferably greater than about 0M to about 0.05M. In another embodiment, the boron (B) containing compound may be added to the stretching bath in an amount of about 0M to about 1.0M, preferably about 0.3M to about 0.6M. In yet another embodiment, the boron (B) containing compound may be added to the crosslinking bath in an amount of greater than about 0M to about 1.0M, preferably about 0.3M to about 0.6M. In yet another embodiment, the boron (B) containing compound may be added to the color correction bath in an amount of about 0.01M to about 0.5M, preferably about 0.05M to about 0.3M. Within this range, the boron (B) -containing compound allows the polarizer to easily reach the boron content of the polarizer without affecting the function of the polarizer.
The silicon (Si) -containing compound includes silicon, and may include a compound to be used for penetrating silicon to the surface and/or inside of the polyvinyl alcohol-based film in the process of preparing the dyed and stretched polyvinyl alcohol-based film.
The silicon (Si) -containing compound may contain an alkoxysilane compound to promote bonding between the dyed and stretched polyvinyl alcohol-based film and the silicon-containing compound. In the manufacture of the polarizer, the alkoxysilane group may be bonded to the surface of the polyvinyl alcohol film by bonding with hydroxyl (OH) groups in the polyvinyl alcohol film when dried.
In one embodiment, the silicon (Si) -containing compound may include at least one selected from the group consisting of: an alkoxysilane containing at least one epoxy group, an alkoxysilane containing at least one nitrogen atom (including aminosilanes and the like), an alkoxysilane containing at least one alkyl group, an alkoxysilane containing at least one mercapto group, and an alkoxysilane containing at least one unsaturated group (e.g., vinyl, (meth) acrylic group and (meth) acryl group). For example, the silicon (Si) -containing compound may include at least one selected from the group consisting of: aminopropyl triethoxysilane (including 3-aminopropyl triethoxysilane and the like), aminopropyl trimethoxysilane, aminoethylaminopropyl trimethoxysilane (including 3-aminoethylaminopropyl trimethoxysilane and the like), and aminoethylaminopropyl triethoxysilane.
At least one type of silicon (Si) -containing compound may be used in at least one of the processes for preparing the dyed and stretched polyvinyl alcohol-based film. In one embodiment, the silicon (Si) -containing compound may be added to the swelling bath in an amount of about 0.01M to about 0.2M, preferably about 0.01M to about 0.1M. In another embodiment, the silicon (Si) -containing compound may be added to the dyeing bath in an amount of about 0.01M to about 0.2M, preferably about 0.01M to about 0.1M. In further embodiments, the silicon (Si) -containing compound may be added to the stretching bath in an amount of about 0.01M to about 0.2M, preferably about 0.01M to about 0.1M. In yet another embodiment, the silicon (Si) -containing compound may be added to the crosslinking bath in an amount of about 0.01M to about 0.2M, preferably about 0.01M to about 0.1M. In yet another embodiment, the silicon (Si) -containing compound may be added to the color correction bath in an amount of about 0.01M to about 0.2M, preferably about 0.01M to about 0.1M. Within this range, the silicon (Si) -containing compound allows the polarizer to reach the silicon content of the polarizer without affecting the function of the polarizer.
As a result, a polarizer including at least a region having a silicon (Si) content of 0.015wt% to 2wt% and a ratio of equation 1 in the range of 0.01 to 0.5 may be manufactured.
In one embodiment, the polarizer according to the present invention may be manufactured by a color correction process, wherein the color correction bath contains 0.05M to 0.3M boric acid and 0.01M to 0.1M silicon compound in the manufacture of the polarizer. Within this range, the polarizer according to the present invention can be effectively implemented.
Next, the first region may be formed by treating a part of the polyvinyl alcohol film.
The region of the polyvinyl alcohol film irradiated with the pulsed light from the xenon flash lamp may form a first region.
Once a region having a degree of polarization lower than that before irradiation is formed, a xenon flash lamp which emits light in a pulse form at a continuous wavelength of about 200nm to about 800nm can reduce damage to a depolarized region (depolarization region, depolarized region) of a polyvinyl alcohol-based film dyed with at least one selected from iodine and a dichroic dye, compared to a conventional femtosecond or picosecond laser.
The light emitted from the xenon flash lamp in pulses can be irradiated from about 1 to about 10 times under the following conditions: a power output of about 300V to about 500V; a pulse frequency of about 0.5Hz to about 2 Hz; and an irradiation duration of about 5ms (milliseconds) to about 15 ms. Under these conditions, the first region according to the present invention can be easily obtained. Upon irradiation with light, a mask having a predetermined shape may be brought into close contact with the upper surface of the dyed and stretched polyvinyl alcohol film to allow a portion where depolarization is not required to maintain its original light transmittance.
[ polarizing plate ]
The polarizing plate according to the present invention includes the polarizer according to the present invention. In one embodiment, the polarizing plate includes a polarizer and a protective layer on at least one surface of the polarizer.
Next, a polarizing plate according to an embodiment of the present invention will be described with reference to fig. 3. Fig. 3 is a sectional view of a polarizing plate according to one embodiment of the present invention.
Referring to fig. 3, the polarizing plate includes a polarizer (110), a first protective layer (120) stacked on an upper surface of the polarizer (110), and a second protective layer (130) stacked on a lower surface of the polarizer (110). The polarizer (110) is substantially the same as the polarizer described above. At least one of the first protective layer (120) and the second protective layer (130) may be omitted as long as the function of the polarizing plate can be achieved even without the first protective layer (120) and the second protective layer (130).
The polarizing plate may include a first polarizing plate region (140) corresponding to (or including) the first region (111) of the polarizer (110) and a second polarizing plate region (150) corresponding to (or including) the second region (112) of the polarizer (110). Here, the "region corresponding to the first region (111)" refers to a region of the polarizing plate located at the same position as the first region of the polarizer and having the same width as the first region thereof. Here, the "region corresponding to the second region (112)" refers to a region of the polarizing plate located at the same position as the second region of the polarizer and having the same width as the second region thereof.
The first polarizing plate region (140) can realize the above-described screen image display function and image capturing function. The first polarizing plate region (140) may have a total transmittance of 80% or more (specifically, 80%, 85%, 90%, 95%, 100%, 80% to 95%, or 85% to 95%); -a color value as of 7 to 0 (in particular, -7, -6.5, -6, -5.5, -5, -4.5, -4, -3.5, -3, -2.5, -2, -1.5, -1, -0.5 or 0, e.g., -1 to 0); and a color value bs of 0 to 25 (specifically, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25, for example, 0 to 3). By satisfying the total transmittance, the color value as, and the color value bs at the same time, the first polarizing plate region (140) can effectively realize a screen image display function and an image capturing function.
In one embodiment, the first polarizer region (140) may have 0.015wt% to 2wt% (specifically, 0.015wt%, 0.05wt%, 0.1wt%, 0.15wt%, 0.2wt%, 0.25wt%, 0.3wt%, 0.35wt%, 0.4wt%, 0.45wt%, 0.5wt%, 0.55wt%, 0.6wt%, 0.65wt%, 0.7wt%, 0.75wt%, 0.8wt%, 0.85wt%, 0.9wt%, 0.95wt%, 1wt%, 1.05wt%, 1.1wt%, 1.15wt%, 1.2wt%, 1.25wt%, 1.3wt%, 1.35wt%, 1.4wt%, 1.45wt%, 1.5wt%, 1.55wt%, 1.6wt%, 1.65wt%, 1.7wt%, 1.75wt%, 1.8wt%, 1.85wt%, 1.9wt%, 1.95wt% or 2wt% silicon and [ 0.01 ]/% of silicon (0.5, 0.5 wt%) 0.0.25 wt%, 0.5wt% silicon (0.0.5 wt%) or [ 0.5.0.5 wt% of silicon, 0.0.5 wt ] [ 0.05wt%, 0.05wt% or [ 0.0.5.0.0.5 wt% of silicon ] [ 0.0.5.5.0.5 wt%.
In one embodiment, the first polarizing plate region (140) may have a content of 0.1wt% to 5wt% (specifically, 0.1wt%, 0.2wt%, 0.3wt%, 0.4wt%, 0.5wt%, 0.6wt%, 0.7wt%, 0.8wt%, 0.9wt%, 1wt%, 1.1wt%, 1.2wt%, 1.3wt%, 1.4wt%, 1.5wt%, 1.6wt%, 1.7wt%, 1.8wt%, 1.9wt%, 2wt%, 2.1wt%, 2.2wt%, 2.3wt%, 2.4wt%, 2.5wt%, 2.6wt%, 2.7wt%, 2.8wt%, 2.9wt%, 3wt%, 3.1wt%, 3.2wt%, 3.3wt%, 3.4wt%, 3.5wt%, 3.6wt%, 3.7wt%, 3.8wt%, 3.9wt%, 4wt%, 4.1wt%, 4.2wt%, 4.3.4 wt%, 4.4wt%, 4.4.4 wt%, 4.5wt%, 4.4wt% boron (B).
The second polarizing plate region (150) can realize only a screen image display function, but cannot realize an image capturing function. The second polarizing plate region (150) may have a total transmittance of 40% to less than 50% (specifically, 40% to 45%) and a degree of polarization of 90% or more (specifically, 90% to 100%). Within this range, the second polarizing plate region may have an antireflection effect on external light.
In one embodiment, the second polarizer region (150) may have 0.015wt% to 2wt% (specifically, 0.015wt%, 0.05wt%, 0.1wt%, 0.15wt%, 0.2wt%, 0.25wt%, 0.3wt%, 0.35wt%, 0.4wt%, 0.45wt%, 0.5wt%, 0.55wt%, 0.6wt%, 0.65wt%, 0.7wt%, 0.75wt%, 0.8wt%, 0.85wt%, 0.9wt%, 0.95wt%, 1wt%, 1.05wt%, 1.1wt%, 1.15wt%, 1.2wt%, 1.25wt%, 1.3wt%, 1.35wt%, 1.4wt%, 1.45wt%, 1.5wt%, 1.55wt%, 1.6wt%, 1.65wt%, 1.7wt%, 1.75wt%, 1.8wt%, 1.85wt%, 1.9wt%, 1.95wt% or 2wt% silicon and [ Si (0.01 to 0.5 wt%), 0.5wt%, 0.25wt%, 0.5wt% silicon (0.5 wt%) or [ 0.5.0.5 wt% silicon, 0.5 wt%).
In one embodiment, the second polarizing plate region (150) may have a content of 0.1wt% to 5wt% (specifically, 0.1wt%, 0.2wt%, 0.3wt%, 0.4wt%, 0.5wt%, 0.6wt%, 0.7wt%, 0.8wt%, 0.9wt%, 1wt%, 1.1wt%, 1.2wt%, 1.3wt%, 1.4wt%, 1.5wt%, 1.6wt%, 1.7wt%, 1.8wt%, 1.9wt%, 2wt%, 2.1wt%, 2.2wt%, 2.3wt%, 2.4wt%, 2.5wt%, 2.6wt%, 2.7wt%, 2.8wt%, 2.9wt%, 3wt%, 3.1wt%, 3.2wt%, 3.3wt%, 3.4wt%, 3.5wt%, 3.6wt%, 3.7wt%, 3.8wt%, 3.9wt%, 4wt%, 4.1wt%, 4.2wt%, 4.3.4 wt%, 4.4wt%, 4.4.4 wt%, 4.5wt%, 4.4wt% boron (B).
First protective layer
The first protective layer (120) may be stacked on an upper surface of the polarizer (110) to protect the polarizer.
The first protective layer (120) may be a photocurable coating or a protective film. The photocurable coating may include a cured layer formed from a composition containing a photocurable compound or a liquid crystal layer formed from a liquid crystalline polymer. The protective film may be a typical protective film for a polarizer. For example, the protective film may be formed of at least one resin selected from the group consisting of: cellulose resins including triacetyl cellulose and the like; polyester resins including polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, and the like; a cyclic polyolefin resin; a polycarbonate resin; polyether sulfone resins; polysulfone resin; polyamide resin; polyimide-based resins; a polyolefin-based resin; polyarylate resins; polyvinyl alcohol resin; polyvinyl chloride-based resins and polyvinylidene chloride-based resins.
The first protective layer (120) may have a thickness of about 1 μm to about 100 μm (e.g., about 1 μm to about 50 μm). Within this range, the first protective layer (120) may be used in a polarizing plate.
Although not shown in fig. 3, the polarizing plate may further include an additional layer (additional layer) on the upper surface of the first protective layer (120) to provide additional functions. For example, the additional layers may include hard coatings, anti-fingerprint layers, anti-reflection layers, low reflectivity layers, anti-glare layers, and the like.
Further, although not shown in fig. 3, the first protective layer (120) may be bonded to the polarizer (110) through an adhesive layer formed of a photocurable adhesive or a thermosetting adhesive.
A second protective layer
The second protective layer (130) may be stacked on a lower surface of the polarizer to protect the polarizer. The second protective layer may have a retardation of a predetermined range to provide the polarizing plate with anti-reflection properties.
The second protective layer (130) may be a single retarder layer or a stack of multiple retarder layers (stack).
In one embodiment, the second protective layer may include a first retarder layer. When external light incident on the polarizing plate passes through the polarizer, the first retardation layer converts linear polarization emitted from the polarizer into circular polarization, thereby preventing reflection of the external light and thus improving screen quality.
The first retarder layer may have an in-plane retardation (Re) of about 100nm to about 220nm, specifically about 100nm to about 180nm, e.g., lambda/4, at a wavelength of 550 nm. Within this range, the first retardation layer can improve screen quality by reducing reflection of external light.
In another embodiment, the second protective layer may include a second retardation layer in addition to the first retardation layer.
The second retardation layer may have an in-plane retardation (Re) of about 225nm to about 350nm, in particular about 225nm to about 300nm, e.g. lambda/2, at a wavelength of 550 nm. Within this range, the second retardation layer may reduce reflection of external light, thereby improving screen quality.
As used herein, the equation may be based on: re= (nx-ny) x d calculates "in-plane retardation (Re)" (where nx and ny are refractive indices of the respective retardation layers in the slow axis direction thereof and in the fast axis direction thereof at a wavelength of 550nm, respectively, and d is the thickness (unit: nm) of the retardation layer).
Each of the first retarder layer and the second retarder layer may be a photocurable coating or protective film as described above in the first protective layer.
The second protective layer (130) may have a thickness of 1 μm to 100 μm, for example 1 μm to 50 μm.
Although not shown in fig. 3, an adhesive layer or a tie layer may be further formed on the lower surface of the second protective layer (130). The adhesive layer or tie layer bonds the polarizing plate to a panel of the optical display device, i.e., a display panel. In addition, although not shown in fig. 3, the second protective layer (130) may be bonded to the polarizer via an adhesive layer formed of a photocurable adhesive or a thermosetting adhesive.
Next, a method of manufacturing a polarizing plate according to an embodiment of the present invention will be described.
The polarizing plate may be manufactured by a method comprising the steps of: the polarizer is manufactured and the first protective layer and the second protective layer are bonded to opposite surfaces of the polarizer, respectively. Each of the first protective layer and the second protective layer may be bonded to the polarizer through an adhesive layer formed of a photocurable adhesive or a thermosetting adhesive.
Next, a method of manufacturing a polarizing plate according to another embodiment of the present invention will be described.
The polarizing plate may be manufactured by a method comprising the steps of: preparing a dyed and stretched polyvinyl alcohol film; bonding the first protective layer and the second protective layer to opposite surfaces of the polyvinyl alcohol film, respectively; and forming a first region by subjecting a portion of the polyvinyl alcohol-based film to a predetermined treatment. An untreated portion of the polyvinyl alcohol-based film becomes the second region.
[ optical display device ]
The optical display device according to the present invention includes the polarizing plate according to the present invention. The optical display device may include a light emitting display (which includes an organic light emitting display, etc.), a liquid crystal display, etc.
The optical display device according to the present invention will be described in more detail with reference to fig. 4.
Referring to fig. 4, the organic light emitting display device may include a display panel (200) formed with a base layer (201) and a plurality of light emitting devices (202), a polarizing plate (100) formed on the display panel (200), a cover glass (300) formed on the polarizing plate (100), and an image sensor (400) disposed at a lower side of the display panel (200). Here, the display panel (200) has no through hole, and the image sensor (400) is disposed outside the display panel (200) instead of being inserted into the display panel (200).
The polarizing plate (100) includes a first polarizing plate region (140) and a second polarizing plate region (150), and includes a polarizing plate according to the present invention. The first polarizing plate region (140) and the second polarizing plate region (150) each define a screen image display region of the optical display device. The polarizing plate (100) has no through hole for penetrating the image sensor (400).
The first polarizing plate region (140) is less densely provided with a light emitting device (202) than the second polarizing plate region (150). With this structure, the polarizing plate (100) can realize both the object image display function of the image sensor (400) and the screen image display function of the display panel (200).
The image sensor (400) is disposed on the lower side of the first polarizing plate region (140). The image sensor (400) may include a camera or the like, but is not limited thereto.
Mode for the invention
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 illustrative purposes only and should not be construed as limiting the invention in any way.
The detailed information of the components used in examples and comparative examples is as follows:
(1) Polarizer sheet: polyvinyl alcohol based film (VF-PE 3000, thickness: 30 μm, kuraray Co., ltd., japan)
(2) Protective film: triacetyl cellulose film (KC 4UYW, thickness: 40 μm, konica Minolta Co., ltd., japan)
Example 1
The polyvinyl alcohol film washed with water was swelled in a swelling bath containing water at 30 ℃.
After the swelling treatment, the polyvinyl alcohol-based film was immersed in a dyeing bath containing a 3wt% aqueous potassium iodide solution at 30℃for 200 seconds. The dyed polyvinyl alcohol film was passed through a wet crosslinking bath containing a 3wt% aqueous boric acid solution at 30 ℃. Thereafter, the polyvinyl alcohol-based film was stretched to a total elongation of 6 times its original length in a wet stretching bath containing a 3wt% aqueous boric acid solution at 50 ℃.
Then, the stretched polyvinyl alcohol film was immersed in a color correction bath containing 0.14M boric acid and 0.02M 3-aminopropyl triethoxysilane at 20 ℃ for 100 seconds, followed by washing and drying.
Next, the protective films were bonded to both surfaces of the dried polyvinyl alcohol-based film by an adhesive (Z-200,Nippon Gohsei,Ltd), thereby producing a laminate.
The laminate is cut into a predetermined size, and a first region is formed on the laminate by only partially irradiating a region of the laminate corresponding to the first region with pulsed light at a wavelength of 200nm to 800nm using a xenon flash lamp, thereby manufacturing a polarizing plate including a polarizer having the first region and the second region. The first region corresponds to a region irradiated with pulsed light, and the second region corresponds to a region not irradiated with pulsed light.
Examples 2 and 3
Polarizers, laminates and polarizing plates were produced in the same manner as in example 1, except that the concentrations of boric acid and 3-aminopropyl triethoxysilane in the color correction bath were changed as listed in table 1.
Examples 4 and 5
Polarizers, laminates and polarizing plates were produced in the same manner as in example 1 except that 3-aminoethylaminopropyl trimethoxysilane was used instead of 3-aminopropyl triethoxysilane, and the concentrations of boric acid and 3-aminoethylaminopropyl trimethoxysilane in the color correction bath were changed as listed in table 1.
Comparative example 1
Polarizers, laminates and polarizing plates were produced in the same manner as in example 1, except that the concentrations of boric acid and 3-aminopropyl triethoxysilane were changed as listed in table 1.
Comparative example 2
Polarizers, laminates and polarizing plates were produced in the same manner as in example 1, except that the concentrations of boric acid and 3-aminopropyl triethoxysilane were changed as listed in table 1.
Table 1 shows the concentrations of boric acid and silicon-containing compounds in the color correction baths.
TABLE 1
| Boric acid | 3-aminopropyl triethoxysilane | 3-Aminoethylaminopropyl trimethoxysilane | |
| Example 1 | 0.14 | 0.02 | 0 |
| Example 2 | 0.12 | 0.04 | 0 |
| Example 3 | 0.08 | 0.08 | 0 |
| Example 4 | 0.12 | 0 | 0.04 |
| Example 5 | 0.08 | 0 | 0.08 |
| Comparative example 1 | 0.16 | 0 | 0 |
| Comparative example 2 | 0.02 | 0.16 | 0 |
The laminates prepared in examples and comparative examples (both refer to laminates before forming the first region and the second region) were evaluated for the properties of table 2, and the evaluation results are shown in table 2.
(1) Total transmittance (unit:%, ts) and orthogonal transmittance (unit:%, tc): the total transmittance of the laminates prepared in each of the examples and comparative examples was measured using a UV-visible spectrophotometer V7100 (JASCO) at a wavelength of 380nm to 780 nm. A value measured at a wavelength of 550nm was obtained.
(2) Polarization degree (unit:%, PE): the polarization degree of each laminate of examples and comparative examples was measured using a UV-visible spectrophotometer V7100 (JASCO) at a wavelength of 380nm to 780 nm. A value measured at a wavelength of 550nm was obtained.
(3) Color values as and bs (no units): the color values as and bs of the laminates of each example and comparative example were measured using a UV-visible spectrophotometer V7100 (JASCO) at wavelengths from 380nm to 780 nm.
(4) Boron (B) and silicon (Si) content (unit: wt%) in the polarizer of the laminate: the boron content and the silicon content of the polarizer in each of the laminates of examples and comparative examples were measured using an ICP-OES tester (Perkin Elmer). Specifically, the prepared standard solution was introduced into an ICP-OES tester to obtain a calibration curve according to an external standard, and then a polarizer was placed in the ICP-OES tester to measure the element concentration of analysis target elements (i.e., B and Si) in the polarizer.
(5) Reliability: the total transmittance (T1, unit:%) was measured on rectangular samples (MD x TD,10cm x 10 cm) of the polarizers of the polarizing plates manufactured in each of the examples and comparative examples by the same method as described above. The sample was left at 85℃for 48 hours, and then the total transmittance (T2, unit:%) was measured by the same method as described above. After the total transmittance change amount (Δt= |t1-T2|) was calculated, Δt of 3% or less was evaluated as o, Δt of more than 3% to 5% was evaluated as Δ, and Δt of more than 5% was evaluated as x.
TABLE 2
| Ts | Tc | PE | as | bs | B | Si | Equation 1 | Reliability of | |
| Example 1 | 42.6 | 0.002 | 99.992 | -1.1 | 2.6 | 2.5 | 0.2 | 0.07 | ○ |
| Example 2 | 42.4 | 0.001 | 99.994 | -1.1 | 2.5 | 2.3 | 0.5 | 0.18 | ○ |
| Example 3 | 42.7 | 0.003 | 99.993 | -1.1 | 2.5 | 1.9 | 0.8 | 0.30 | ○ |
| Example 4 | 42.6 | 0.002 | 99.992 | -1.0 | 2.6 | 2.2 | 0.5 | 0.19 | ○ |
| Example 5 | 42.5 | 0.001 | 99.996 | -1.0 | 2.5 | 1.9 | 1.0 | 0.34 | ○ |
| Comparative example 1 | 41.9 | 0.002 | 99.995 | -1.5 | 3.7 | 2.8 | - | - | ○ |
| Comparative example 2 | 42.4 | 0.001 | 99.996 | -1.0 | 2.6 | 1.3 | 1.5 | 0.53 | X |
The polarizing plates having the first and second regions manufactured in examples and comparative examples were evaluated for the performance of table 3, and the evaluation results are shown in table 3, fig. 6, and fig. 7.
(1) Total transmittance (unit:%, ts) and orthogonal transmittance (unit:%, tc): the total transmittance on the first region and the second region in the polarizing plates manufactured in each of the examples and comparative examples was measured by the same method as described above. A value measured at a wavelength of 550nm was obtained.
(2) Polarization degree (unit:%, PE): the degree of polarization on the first region and the second region in the polarizing plates manufactured in each of the examples and comparative examples was measured by the same method as described above. A value measured at a wavelength of 550nm was obtained.
(3) Color values as and bs (no units): the color values as and bs were measured on the first areas in the polarizing plates of each of the examples and comparative examples by the same method as described above.
(4) Boron (B) and silicon (Si) content (unit: wt%) in the first region of the polarizer: the boron content and the silicon content of the first region in each of the polarizing plates of examples and comparative examples were measured by the same method as described above.
(5) Images of the first region and the second region: images of the first region and the second region in the polarizing plates of each of the examples and comparative examples were observed using a digital camera.
TABLE 3
As shown in tables 2 and 3 and (a) of fig. 7, the polarizer according to the present invention or the polarizing plate including the same exhibits good reliability at high temperature, does not yellow or minimizes yellowing, and may form the first region having a light transmittance of 80% or more. The first region has no or minimal yellowing and has a light transmittance of 80% or more. As a result, although not shown in table 3, when the image sensor is disposed below the first region, the first region may prevent the image sensor from being visible while realizing a clear image when capturing an image by the image sensor. Further, as shown in fig. 6, the polarizer according to the present invention or the polarizing plate including the same exhibits high transmittance in the entire wavelength range of 400nm to 800 nm.
In contrast, as shown in tables 2 and 3 and (B) of fig. 7, the polarizer of the comparative example or the polarizing plate including the same, in which the silicon content does not fall within the silicon content of the present invention or the ratio of equation 1 is not in the range of 0.01 to 0.5, does not allow formation of the first region having all the above effects. Further, as shown in fig. 6, the polarizer of comparative example 1 or the polarizing plate including the same exhibits relatively low light transmittance in the entire wavelength range of 400nm to 800 nm. Further, as shown in fig. 7 (B), the first polarizing plate region has a yellow color, which indicates severe yellowing.
It will be understood by those skilled in the art that various modifications, changes, alterations, and equivalent embodiments may be made without departing from the spirit and scope of the invention.
Claims (20)
1. A polarizer comprising at least a region having a silicon (Si) content of 0.015wt% to 2wt% and a ratio of equation 1 in a range of 0.01 to 0.5:
[ equation 1]
Ratio = [ silicon content ]/[ silicon content+boron content ]
(in the equation 1,
the silicon content is the content of silicon (Si) in the region (unit: wt%), and the boron content is the content of boron (B) in the region (unit: wt%).
2. The polarizer of claim 1, wherein the region has a boron content of 0.1wt% to 5 wt%.
3. The polarizer of claim 1, wherein the region is an entire surface of the polarizer.
4. The polarizer of claim 1, wherein the region comprises: a hydroxyl-containing polyvinyl alcohol film and a silicon-containing compound containing an alkoxysilane group bonded to the hydroxyl group.
5. The polarizer of claim 4, wherein the silicon-containing compound containing the alkoxysilane group comprises at least one selected from the group consisting of: an alkoxysilane containing at least one epoxy group, an alkoxysilane containing at least one nitrogen atom, an alkoxysilane containing at least one alkyl group, an alkoxysilane containing at least one mercapto group, and an alkoxysilane containing at least one unsaturated group.
6. The polarizer of claim 1, wherein the polarizer comprises: a second region including the region; and a first region having a higher total transmittance than the second region.
7. The polarizer of claim 6, wherein the first region has a silicon (Si) content of 0.015wt% to 2wt% and a ratio of equation 2 in the range of 0.01 to 0.5:
[ equation 2]
Ratio = [ silicon content ]/[ silicon content+boron content ]
(in the equation 2,
the silicon content is the content of silicon (Si) in the first region (unit: wt%), and
the boron content is the content of boron (B) in the first region (unit: wt%)).
8. The polarizer of claim 7, wherein the first region has a boron content of 0.1wt% to 5 wt%.
9. The polarizer of claim 6, wherein the first region has a total transmittance of 80% or more, -a color value as of 7 to 0, and a color value bs of 0 to 25.
10. The polarizer of claim 6, wherein the first region has a total transmittance of 60% or more at a wavelength of 450 nm.
11. The polarizer of claim 6, wherein the first region comprises: a hydroxyl-containing polyvinyl alcohol film and a silicon-containing compound containing an alkoxysilane group bonded to the hydroxyl group.
12. The polarizer of claim 11, wherein the silicon-containing compound containing the alkoxysilane group comprises at least one selected from the group consisting of: an alkoxysilane containing at least one epoxy group, an alkoxysilane containing at least one nitrogen atom, an alkoxysilane containing at least one alkyl group, an alkoxysilane containing at least one mercapto group, and an alkoxysilane containing at least one unsaturated group.
13. The polarizer of claim 6, wherein the first region has a different concentration profile of iodide ions than the second region.
14. The polarizer of claim 6, wherein the second region has a total transmittance of 40% to less than 50%.
15. A polarizing plate comprising the polarizer of any one of claims 1 to 14.
16. The polarizing plate according to claim 15, wherein the polarizing plate comprises: a first polarizing plate region having a total transmittance of 80% or more, -a color value as of 7 to 0 and a color value bs of 0 to 25; and a second polarizing plate region having a lower total transmittance than the first polarizing plate region.
17. The polarizing plate of claim 16, wherein the first polarizing plate region has a silicon (Si) content of 0.015wt% to 2wt% and a [ silicon content ]/[ silicon content+boron content ] ratio of 0.01 to 0.5.
18. The polarizing plate of claim 16, wherein the second polarizing plate region has a silicon (Si) content of 0.015wt% to 2wt% and a [ silicon content ]/[ silicon content+boron content ] ratio of 0.01 to 0.5.
19. An optical display device comprising the polarizing plate according to claim 15.
20. The optical display device of claim 19, comprising:
the display panel is provided with a display screen,
the polarizing plate disposed on the upper side of the display panel, and
an image sensor disposed at a lower side of the display panel,
the image sensor is disposed at a lower side of the first polarizing plate region of the polarizing plate.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020210050726A KR102591795B1 (en) | 2021-04-19 | 2021-04-19 | Polarizer, polarizing plate comprising the same and optical display apparatus comprising the same |
| KR10-2021-0050726 | 2021-04-19 | ||
| PCT/KR2022/005568 WO2022225288A1 (en) | 2021-04-19 | 2022-04-19 | Polarizer, polarizing plate comprising same, and optical display device comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117255957A true CN117255957A (en) | 2023-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280029716.7A Pending CN117255957A (en) | 2021-04-19 | 2022-04-19 | Polarizer, polarizing plate comprising same and optical display device comprising same |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR102591795B1 (en) |
| CN (1) | CN117255957A (en) |
| WO (1) | WO2022225288A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002055226A (en) * | 2000-08-07 | 2002-02-20 | Nippon Sheet Glass Co Ltd | Polarizing element and method for manufacturing the same |
| JP4869644B2 (en) * | 2005-06-30 | 2012-02-08 | 日本合成化学工業株式会社 | Process for producing polyvinyl alcohol film for optical film |
| JP2011053234A (en) * | 2008-01-11 | 2011-03-17 | Nippon Kayaku Co Ltd | Dye-based polarizer, polarizing plate, and method for producing them |
| KR20150111878A (en) * | 2014-03-26 | 2015-10-06 | 주식회사 엘지화학 | Methods for manufacturing for polarizing element, polarizing element roll and single sheet type polarizing element having locally bleaching areas |
| JP6422415B2 (en) * | 2015-09-28 | 2018-11-14 | 日東電工株式会社 | Polarizer, polarizing plate and image display device |
-
2021
- 2021-04-19 KR KR1020210050726A patent/KR102591795B1/en active Active
-
2022
- 2022-04-19 CN CN202280029716.7A patent/CN117255957A/en active Pending
- 2022-04-19 WO PCT/KR2022/005568 patent/WO2022225288A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| KR102591795B1 (en) | 2023-10-19 |
| WO2022225288A1 (en) | 2022-10-27 |
| KR20220144259A (en) | 2022-10-26 |
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