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WO2012070808A2 - Plaque polarisante antireflet et appareil d'affichage d'image la comprenant - Google Patents

Plaque polarisante antireflet et appareil d'affichage d'image la comprenant Download PDF

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Publication number
WO2012070808A2
WO2012070808A2 PCT/KR2011/008847 KR2011008847W WO2012070808A2 WO 2012070808 A2 WO2012070808 A2 WO 2012070808A2 KR 2011008847 W KR2011008847 W KR 2011008847W WO 2012070808 A2 WO2012070808 A2 WO 2012070808A2
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WO
WIPO (PCT)
Prior art keywords
polarizing plate
hwf
qwf
film
wave film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2011/008847
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English (en)
Korean (ko)
Other versions
WO2012070808A3 (fr
Inventor
김봉춘
김기만
김형욱
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongwoo Fine Chem Co Ltd
Original Assignee
Dongwoo Fine Chem Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dongwoo Fine Chem Co Ltd filed Critical Dongwoo Fine Chem Co Ltd
Publication of WO2012070808A2 publication Critical patent/WO2012070808A2/fr
Publication of WO2012070808A3 publication Critical patent/WO2012070808A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • 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

Definitions

  • the present invention relates to a polarizing plate in which an antireflection effect is maximized not only in the front direction of the screen but also in an inclined direction, and an image display device such as a liquid crystal display (LCD) and an organic light emitting diode (OLED) including the polarizing plate.
  • LCD liquid crystal display
  • OLED organic light emitting diode
  • Polarizers are display-related materials that produce light that vibrates in only one direction.
  • the polarizing plate generally has a structure in which a transparent protective film is laminated by an adhesive on both surfaces of a polarizer made of polyvinyl alcohol (PVA) resin, and the transparent protective film may be replaced by a film having a phase difference compensation function according to the purpose.
  • PVA polyvinyl alcohol
  • the polarizing plate having the above structure is widely used in an image display device.
  • a liquid crystal display LCD
  • two polarizing plates are used to adjust the amount of light emitted from the backlight according to the purpose
  • OLED organic light emitting diode
  • the image display device it is one of the very important problems to improve the contrast that represents the difference in luminance between the lightest and darkest parts of the screen.
  • simply increasing the brightness of the light source may be considered as one method, but this increases the power consumption generated by the backlight of the LCD or the organic light emitting OLED.
  • Korean Patent Laid-Open Publication No. 2003-89500 has proposed a polarizing plate having a half-wave film and a quarter-wave film each including an anisotropic material polymerized or vitrified under the polarizer.
  • the polarizing plate is used in an image display device such as a liquid crystal display (LCD) and an organic light emitting diode (OLED), the antireflection effect in the front direction is excellent, but the antireflection effect in the inclination direction is still inferior.
  • LCD liquid crystal display
  • OLED organic light emitting diode
  • An object of the present invention is to provide a polarizing plate in which the antireflection effect is maximized not only in the front direction of the screen but also in the inclined direction.
  • An object of the present invention is to provide an image display device such as an organic light emitting diode (OLED), a liquid crystal display (LCD), etc., in which the antireflection effect is maximized not only in the front direction of the screen but also in the inclined direction.
  • OLED organic light emitting diode
  • LCD liquid crystal display
  • a polarizer located below the upper polarizer, and a quarter-wave film (QWF) located below the half-wave film, wherein the half-wave film and the quarter-wave film have different slow axes.
  • the polarizing plate is disposed to form 40 to 80 °, the refractive index ratio of the upper half-wave film and the upper quarter-wave film are each independently 0 ⁇ NZ HWF ⁇ 1 and 0 ⁇ NZ QWF ⁇ 1.
  • the half-wave film is arranged so that the slow axis is 5 to 25 ° with respect to the transmission axis or absorption axis of the polarizer and the quadrature film is the transmission axis or absorption axis of the polarizer
  • a polarizing plate disposed to form 65 to 85 degrees with respect to the axis.
  • the polarizer is further disposed on the polarizer selected from the group consisting of a protective film, a retardation plate and a touch panel.
  • Image display device comprising a polarizing plate according to any one of 1 to 13 above.
  • the image display apparatus according to the above 14, wherein the image display apparatus is an organic light emitting diode (OLED) or a liquid crystal display (LCD).
  • OLED organic light emitting diode
  • LCD liquid crystal display
  • the polarizing plate having the refractive index ratio of the present invention exhibits a reverse wavelength dispersion effect, and the image display device including the polarizing plate exhibits low reflectance not only in the front direction of the screen but also in the inclined direction.
  • the polarizing plate of the present invention is suitable for mass production because it can be produced by bonding a roll-shaped half-wave film and a quarter-wave film to a polarizer in roll to roll.
  • Example 1 briefly shows a structure of a laminate according to Example 1 of the present invention.
  • Figure 3 shows the visibility of the omnidirectional transmittance simulation results of the laminate of Example 1.
  • FIG. 6 shows a case where a polarizing plate according to the present invention is used as a polarizing plate of an organic light emitting diode (OLED).
  • OLED organic light emitting diode
  • FIG. 7 to 20 show the results of the visibility omnidirectional permeability simulation of the laminates of Examples 2 to 13 and Comparative Examples 2 and 3.
  • FIG. 7 to 20 show the results of the visibility omnidirectional permeability simulation of the laminates of Examples 2 to 13 and Comparative Examples 2 and 3.
  • the present invention includes a polarizer, a half-wave film (HWF) positioned below the upper polarizer and a quarter-wave film (QWF) positioned below the half-wave film, wherein the half-wave film and the quarter-wave film have a slow axis.
  • each polarization ratio of the upper half-wave film and the upper quarter-wave film includes 0 ⁇ NZ HWF ⁇ 1 and 0 ⁇ NZ QWF ⁇ 1 by including a polarizing plate in the front direction of the screen as well as in the inclined direction An image display apparatus excellent in antireflection characteristics.
  • the polarizing plate of the present invention includes a polarizer, a half wavelength film (HWF) positioned below, and a quarter wave film (QWF) positioned below.
  • HWF half wavelength film
  • QWF quarter wave film
  • the polarizer of the present invention means a conventional one manufactured to obtain polarized light vibrating in one direction in the image display device.
  • Half-wavelength films (HWF, 1/2 retardation plates or ⁇ / 2 films) and quarter-wavelength films (QWF, quarter retardation plates or ⁇ / 4 films) are, for example, uniaxial, biaxial, or otherwise directed to polymer films. It can obtain by orienting in an appropriate method.
  • the kind of the polymer compound constituting the polymer film is not particularly limited. However, it is preferable to use a high transparency polymer compound suitable for use in an image display device, and such a compound is a polycarbonate compound, a polyester compound, a polysulfone compound, a polyether sulfone compound, a polystyrene compound, Polyolefin compounds, polyvinyl alcohol compounds, cellulose acetate compounds, polymethyl methacrylate compounds, polyvinyl chloride compounds, polyacrylate polyvinyl chloride compounds, polyamide chloride polyvinyl chloride compounds, and the like.
  • a high transparency polymer compound suitable for use in an image display device and such a compound is a polycarbonate compound, a polyester compound, a polysulfone compound, a polyether sulfone compound, a polystyrene compound, Polyolefin compounds, polyvinyl alcohol compounds, cellulose acetate compounds, polymethyl methacrylate compounds, polyvinyl chloride
  • the half wave film (HWF) and the quarter wave film (QWF) may be made of the same material or of different materials.
  • the half-wave film (HWF) and the quarter-wave film (QWF) can be made of nematic or smectic, preferably nematic liquid crystal material, polymerizable by in situ polymerization.
  • the polymerizable material can be coated on a substrate, oriented in a planar orientation and subsequently polymerized by exposure to heat or ultraviolet light.
  • the half-wave film (HWF) and the quarter-wave film (QWF) of the present invention each independently have a refractive index ratio NZ defined by Equation 1 below 0 ⁇ NZ ⁇ 1.
  • nx and ny are in-plane refractive indices nx ⁇ ny, and nz represents the thickness direction refractive index of the film
  • NZ HWF is 0.1 ⁇ NZ HWF ⁇ 0.9, preferably 0.25 ⁇ NZ HWF ⁇ 0.75
  • NZ QWF is 0.1 ⁇ NZ QWF ⁇ 0.9, preferably 0.25 ⁇ NZ QWF ⁇ 0.75.
  • 0.1 ⁇ NZ HWF and ⁇ 0.9 ⁇ 0.9 0.1 ⁇ NZ QWF is when the more preferred, and 0.25 ⁇ NZ HWF ⁇ 0.75 ⁇ 0.75 a QWF and 0.25 ⁇ NZ The case is even more preferred.
  • NZ HWF + NZ QWF? 0.75 is preferred, and NZ HWF + NZ QWF? 1 is more preferred.
  • the half-wave film may be appropriately selected within the range in which the front phase difference (RO HWF ) defined by Equation 2 below satisfies the above NZ value, but for example, the one having a wavelength of 550 nm may be 200 to 360 nm. It is preferable and it is more preferable that it is 220-260 nm.
  • RO HWF front phase difference
  • nx and ny are planar refractive indices nx ⁇ ny and d represents the thickness of the film.
  • the thickness of the half-wave film is not particularly limited but may be, for example, 10 to 100 ⁇ m, preferably 20 to 80 ⁇ m, in consideration of the case of a film that is commonly used.
  • the quarter wave film (QWF) may be appropriately selected within a range in which the front phase difference (RO QWF ) defined by Equation 2 satisfies the above NZ value, but is, for example, 80 to 180 nm at a wavelength of 550 nm. It is preferable to use, and it is more preferable that it is 100-130 nm.
  • the thickness of the quarter wave film is not particularly limited, but may be, for example, 10 to 100 ⁇ m, preferably 20 to 80 ⁇ m, in consideration of the case of a film that is commonly used.
  • the thickness retardation value Rth of the half-wavelength film HWF and the quarter-wavelength film QWF may be appropriately determined according to the following Equation 3 when NZ and RO are determined as described above.
  • NZ is the refractive index ratio
  • Rth is the thickness retardation
  • RO is the front retardation
  • the polarizer, the half-wave film (HWF) and the quarter wave film (QWF) can be used both in sheet form and in roll form.
  • the half-wavelength film HWF and the quarter-wavelength film QWF are preferably arranged such that the planes are parallel to each other and the slow axis is 40 to 80 °, and more preferably 55 to 65 °.
  • the parallel to each other is not only mathematically parallel but also a parallel in the manufacturing process of the polarizing plate is a concept including a case where there is no substantial difference in the implementation of the intended effect of the present invention.
  • the half-wave film HWF is preferably arranged such that its slow axis is 5 to 25 degrees with respect to the transmission axis or absorption axis of the polarizer, and more preferably 10 to 20 degrees.
  • the quarter wave film is preferably arranged such that its slow axis is 65 to 85 ° with respect to the transmission axis or absorption axis of the polarizer, and more preferably 70 to 80 °.
  • the polarizing plate of the present invention When the polarizing plate of the present invention is disposed in the order of the polarizer, the half-wave film on the bottom and the quarter-wave film on the bottom, a transparent protective film, an additional retardation plate, a hard coating layer, a touch panel, etc. can be arranged on the top of the polarizer. have.
  • the polarizer according to the invention can be used for display devices, specifically TN (twisted nematic), HTN (very twisted nematic) or STN (over twisted nematic) mode display, AMD-TN (active matrix induced TN) display, Surface Switching (IPS) mode display, DAP (aligned phase deformation) or VA (vertically aligned) mode display such as ECB (electrically controlled birefringence), CSH (color super homeotropic), VAN or VAC (vertical alignment) Nematic or cholesteric) display, MVA (multi-domain vertically aligned) display, bend mode display or hybrid display such as OCB (optically compensated bent cell or optically compensated birefringence), R-OCB (Reflective OCB), HAN (hybrid aligned nematic) or pie-cell display or organic light emitting diode (OLED).
  • TN twisted nematic
  • HTN very twisted nematic
  • STN over twisted
  • the polarizing plate according to the present invention can be particularly preferably used for improving light to antireflection properties in organic light emitting diodes (OLEDs), reflective or transmissive LCDs.
  • OLEDs organic light emitting diodes
  • LCDs reflective or transmissive LCDs.
  • polarizing plate according to the present invention is used in place of a conventional polarizing plate, other components of an image display device such as an organic light emitting diode (OLED) and a liquid crystal display (LCD) may adopt a conventional general configuration as it is.
  • OLED organic light emitting diode
  • LCD liquid crystal display
  • the anti-reflection effect in the organic light emitting diode (OLED) equipped with the polarizing plate according to the present invention will be described with reference to FIG. 6.
  • the same can be applied to the reflective LCD.
  • FIG. 6 shows an organic light emitting diode (OLED) stacked from the top in order of a polarizer, a half wavelength film, a quarter wavelength film, and a metal electrode (reflective layer) of an OLED panel.
  • OLED organic light emitting diode
  • FIG. Line polarization oscillates in only one direction, and linear polarization becomes circularly polarized light after passing through a half-wave film having 0 ⁇ NZ ⁇ 1 and a quarter wave film having 0 ⁇ NZ ⁇ 1, respectively, in sequence.
  • the direction of vibration is different from the linear polarization passing through the first polarizer. It is a principle that the anti-reflection property is improved by preventing other light from passing through the polarizer.
  • a quadrant wavelength film (Xenoa, Xeon), a half wavelength film (Xenoa, Xeon), and a polarizer (PVA polarizer, Dongwoo Fine) are placed on the reflective layer (mirror) as shown in FIG. Chem) and transparent protective film (TAC, Konica) have the absorption axis of the upper polarizer and the slow axis of the upper half-wave film being 15 ° to each other, the absorption axis of the upper polarizer and the slow axis of the quarter wave film. It laminated
  • 2 is a polarization state when external light, which is natural light, is polarized past the polarizer and passes through the half-wave film HWF and the quarter-wave film QWF
  • 4 is the polarization state when the light is reflected
  • 5 shows the polarization state when the reflected light passes through the quarter wave film QWF
  • 6 shows the polarization state when the reflected light passes through the half wavelength film HWF.
  • Example 2 A laminate having the same structure as in Example 1 was prepared, but the NZ coefficients of the half-wave film and the quarter-wave film were set to 1.5.
  • the polarization state in which the reflected light is completely absorbed by the polarizer, as described with reference to FIG. 2, corresponds to P1 of FIG. 4, which passes through the polarizer of the laminate of the comparative example.
  • the previous polarization state 6 is far from P1.
  • 3 in FIG. 4 is a polarization state when external light, which is natural light, is polarized past the polarizer and passes through the half-wave film HWF and the quarter-wave film QWF
  • 4 is the polarization state when the light is reflected
  • 5 shows the polarization state when the reflected light passes through the quarter wave film QWF
  • 6 shows the polarization state when the reflected light passes through the half wavelength film HWF.
  • the embodiments of the present application is excellent in the overall antireflection properties compared to the comparative example, in particular, the NZ coefficient of the half-wavelength film and quarter-wavelength film of the laminate is 0.25 ⁇ In the case of NZ HWF ⁇ 0.75 and 0.25 NZ NZ QWF ⁇ 0.75, it can be seen that the anti-reflection characteristics of NZ HWF + NZ QWF ⁇ 1 is better.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

La présente invention porte sur une plaque polarisante antireflet et sur un appareil d'affichage d'image comprenant la plaque polarisante antireflet, et, en particulier, sur un appareil d'affichage d'image comprenant un polariseur, sur un film demi-onde (HWF) placé sous le polariseur, et sur un film quart d'onde (QWF) placé sous le HWF, le HWF et le QWF ayant des axes de surface inclinés à un angle d'environ 40° à 80° l'un par rapport à l'autre. En outre, l'appareil d'affichage d'image comprend une plaque polarisante dans laquelle le HWF et le QWF ont des indices de réfraction d'environ 0<NZHWF<1 et d'environ 0<NZQWF<1, respectivement. Ainsi, l'appareil d'affichage d'image peut avoir des propriétés antireflet supérieures dans la direction avant, ainsi que dans une direction inclinée d'un écran.
PCT/KR2011/008847 2010-11-23 2011-11-18 Plaque polarisante antireflet et appareil d'affichage d'image la comprenant Ceased WO2012070808A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2010-0116657 2010-11-23
KR1020100116657A KR20120055129A (ko) 2010-11-23 2010-11-23 반사 방지용 편광판 및 이를 포함하는 화상표시장치

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WO2012070808A2 true WO2012070808A2 (fr) 2012-05-31
WO2012070808A3 WO2012070808A3 (fr) 2012-09-27

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103207426A (zh) * 2013-03-28 2013-07-17 京东方科技集团股份有限公司 一种偏光片及显示装置
EP3064969A4 (fr) * 2013-10-28 2017-07-05 Zeon Corporation Film multicouche, stratifié optiquement anisotrope, polariseur circulaire, affichage électroluminescent organique et procédés de fabrication associés
CN107076902A (zh) * 2014-09-26 2017-08-18 日本瑞翁株式会社 圆偏振片及其制造方法、宽频带λ/4波片、有机电致发光显示装置、以及液晶显示装置
DE202014011155U1 (de) 2013-06-14 2018-03-07 The Procter & Gamble Company Bei Nässe Kanäle bildender absorbierender Artikel und absorbierender Kern
CN111263904A (zh) * 2017-10-23 2020-06-09 三星Sdi株式会社 液晶位相差膜、包括其的用于发光显示器的偏光板以及包括其的发光显示器

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WO2015046983A1 (fr) * 2013-09-27 2015-04-02 주식회사 엘지화학 Film optique
TWI547719B (zh) 2013-09-27 2016-09-01 Ｌｇ化學股份有限公司 光學膜
EP3032603A1 (fr) 2014-12-08 2016-06-15 Samsung Electronics Co., Ltd Film antireflet et dispositif électroluminescent organique comprenant celui-ci
KR101623086B1 (ko) 2014-12-08 2016-05-20 삼성전자 주식회사 반사방지필름 및 이를 구비한 유기발광장치
KR20160079687A (ko) 2014-12-26 2016-07-06 삼성전자주식회사 반사방지필름 및 이를 구비한 유기발광장치
KR102304889B1 (ko) 2015-02-11 2021-09-23 삼성전자주식회사 유기 발광 장치 및 그 제조 방법

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JPH11231132A (ja) * 1998-02-12 1999-08-27 Nitto Denko Corp １／４波長板、円偏光板及び液晶表示装置
JP4276392B2 (ja) * 2001-07-25 2009-06-10 龍男 内田 円偏光板およびそれを用いた液晶ディスプレイ
JP4109914B2 (ja) * 2002-06-24 2008-07-02 日東電工株式会社 積層光学フィルム及びその用途
JP4997591B2 (ja) * 2007-03-30 2012-08-08 Ｎｌｔテクノロジー株式会社 タッチパネル付き液晶表示装置及び端末装置

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103207426A (zh) * 2013-03-28 2013-07-17 京东方科技集团股份有限公司 一种偏光片及显示装置
WO2014153852A1 (fr) * 2013-03-28 2014-10-02 京东方科技集团股份有限公司 Polariseur et dispositif d'affichage
US9690025B2 (en) 2013-03-28 2017-06-27 Boe Technology Group Co., Ltd. Polarizer and display device
DE202014011155U1 (de) 2013-06-14 2018-03-07 The Procter & Gamble Company Bei Nässe Kanäle bildender absorbierender Artikel und absorbierender Kern
EP3064969A4 (fr) * 2013-10-28 2017-07-05 Zeon Corporation Film multicouche, stratifié optiquement anisotrope, polariseur circulaire, affichage électroluminescent organique et procédés de fabrication associés
US10895783B2 (en) 2013-10-28 2021-01-19 Zeon Corporation Method for manufacturing a multilayer film comprising a step of directly applying a liquid crystal composition containing a polymerizable liquid crystal compound onto a surface of a fed-out first substrate
CN107076902A (zh) * 2014-09-26 2017-08-18 日本瑞翁株式会社 圆偏振片及其制造方法、宽频带λ/4波片、有机电致发光显示装置、以及液晶显示装置
EP3199990A4 (fr) * 2014-09-26 2018-05-30 Zeon Corporation Plaque de polarisation circulaire, son procédé de production, plaque /4 à large bande, dispositif d'affichage électroluminescent organique, et dispositif d'affichage à cristaux liquides
US10310286B2 (en) 2014-09-26 2019-06-04 Zeon Corporation Circularly polarizing plate, method for producing same, broadband lambda/4 plate, organic electroluminescent display device, and liquid crystal display device
CN107076902B (zh) * 2014-09-26 2020-12-29 日本瑞翁株式会社 圆偏振片及其制造方法、宽频带λ/4波片、有机电致发光显示装置、以及液晶显示装置
CN111263904A (zh) * 2017-10-23 2020-06-09 三星Sdi株式会社 液晶位相差膜、包括其的用于发光显示器的偏光板以及包括其的发光显示器

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Publication number Publication date
TW201227010A (en) 2012-07-01
KR20120055129A (ko) 2012-05-31
WO2012070808A3 (fr) 2012-09-27

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