WO2005098489A1 - 偏光子、偏光板、光学フィルムおよび画像表示装置 - Google Patents
偏光子、偏光板、光学フィルムおよび画像表示装置 Download PDFInfo
- Publication number
- WO2005098489A1 WO2005098489A1 PCT/JP2005/004961 JP2005004961W WO2005098489A1 WO 2005098489 A1 WO2005098489 A1 WO 2005098489A1 JP 2005004961 W JP2005004961 W JP 2005004961W WO 2005098489 A1 WO2005098489 A1 WO 2005098489A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polarizer
- liquid crystal
- film
- polarizing plate
- light
- Prior art date
Links
Classifications
-
- 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
-
- 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
Definitions
- Liquid crystal display devices are rapidly expanding to markets such as watches, mobile phones, PDAs, notebook computers, monitors for personal computers, DVD players, and TVs.
- the liquid crystal display device visualizes a change in polarization state due to switching of liquid crystal, and uses a display principle of a polarizer.
- displays with higher brightness and higher contrast are required for applications such as TV, and polarizers with higher brightness (high transmittance) and higher contrast (high polarization) have been developed and introduced. Have been.
- a polarizer for example, an iodine-based polarizer having a structure in which iodine is adsorbed on polybutyl alcohol and stretched is widely used because of its high transmittance and high degree of polarization. And Patent Document 1). However, since the degree of polarization on the short wavelength side is relatively low, the iodine polarizer has problems on the hue such as blue spots in black display and yellowish in white display.
- the former has a problem that the transmittance of white display is reduced at the same time as the transmittance of black display, and the display itself is darkened. In the latter case, it is necessary to replace the process itself, and there is a problem that productivity is deteriorated.
- the present inventors have conducted intensive studies to solve the above problems, and as a result, have found that the above object can be achieved by the following polarizer, and have completed the present invention.
- the scattering performance of anisotropic scattering is caused by the difference in the refractive index between the matrix and the minute region.
- the liquid crystal birefringent material that forms the microscopic region has a higher wavelength dispersion of ⁇ than the translucent resin of the matrix, so that the difference in the refractive index of the scattering axis increases on the short wavelength side, and the scattering decreases on the short wavelength. Large amount.
- a neutralizer having high polarization and hue can be realized as a whole, in which the shorter the wavelength, the greater the effect of improving the polarization performance.
- the dichroic light-absorbing material which is containing organic polyvinyl alcohol ⁇ material forming the minute domains and the absorption axis, have preferably be oriented in .DELTA..eta 1 direction .
- the second main transmittance k (the transmittance in the minimum direction 2 !! linear polarization transmittance in one direction))
- the degree of polarization (k k) Z (k + k).
- the translucent resin 1 has translucency in the visible light region, and can be used without particular limitation as long as it can disperse and adsorb a dichroic light absorber.
- the translucent resin 1 is a translucent water-soluble resin.
- a material other than the polyvinyl alcohol-based resin is used as the minute region 2b in order to disperse the polyvinyl alcohol-based resin.
- the matrix uses a resin other than polyvinyl alcohol-based resin, heat resistance and moisture resistance are good. Particularly when a resin other than water-soluble is used, heat resistance and moisture resistance are good.
- Examples of the translucent resin 1 include water-soluble resins such as polyvinyl pyrrolidone resin and amylose resin.
- Examples of the light-transmitting resin 1 include polyester resins such as polyethylene terephthalate and polyethylene naphthalate; styrene resins such as polystyrene and acrylonitrile-styrene copolymer (AS resin); polyethylene, polypropylene, and the like. Examples thereof include polyolefins having a cyclo- or norbornene structure, and olefin resins such as ethylene-propylene copolymers.
- a non-liquid crystalline resin can be used as long as the material is different from a matrix material which is not limited to the liquid crystalline birefringent material.
- the resin include polyarylate, polysulfone, polyimide, polycarbonate, polyacrylamide, polyethylene terephthalate, and acrylic styrene copolymer.
- particles having no birefringence can be used as a material for forming the minute region 2a.
- the fine particles include a resin such as polyatalylate and an acrylic styrene copolymer. The size of the fine particles is not particularly limited.
- the dichroic light absorber 3 has heat resistance, and even when the liquid crystal birefringent material forming the microregion 2a is oriented by heating in the liquid crystal temperature range, the dichroic light is decomposed or deteriorated.
- the one that does not lose is preferably used.
- the powerful dichroic light absorber 3 include an iodine-based light absorber, an absorption dichroic dye and a pigment.
- the mixed solution is dried by heating and the solvent is removed, so that two or more types of fine regions are formed in the matrix.
- a method for forming a film various methods such as a casting method, an extrusion molding method, an injection molding method, a roll molding method, and a casting method can be adopted.
- a mixed molten resin various methods such as rolling, extrusion molding, injection molding, roll molding, and cast molding can be employed.
- the step (3) of orienting the film can be performed by stretching the film.
- a process (5) for various purposes can be performed in addition to the processes (1) to (4).
- the step (5) includes, for example, a step of immersing the film in an appropriate solvent to swell the film, mainly for the purpose of improving the dyeing efficiency of the film.
- additives are added mainly for the purpose of improving reliability by crosslinking with a water-soluble resin (matrix) or for adjusting the amount balance of dichroic light absorbers and adjusting the hue.
- a transparent protective layer that can be particularly preferably used in view of polarization characteristics and durability is a triacetyl cellulose film whose surface is saponified with an alkali or the like.
- the thickness of the transparent protective layer is arbitrary, but is generally 500 m or less, more preferably 1.1 to 300 / ⁇ , particularly preferably 5 to 300 / zm, for the purpose of reducing the thickness of the polarizing plate.
- transparent protection on both sides of the polarizer When a layer is provided, a transparent protective film having different polymer strengths on both sides can be used.
- the hard coat treatment is performed for the purpose of preventing scratches on the surface of the polarizing plate, and is, for example, a cure that is excellent in hardness, slip characteristics, and the like by using an appropriate UV-curable resin such as an acrylic or silicone resin.
- the film can be formed by a method of adding a film to the surface of the transparent protective film.
- the anti-reflection treatment is performed for the purpose of preventing reflection of external light on the polarizing plate surface, and can be achieved by forming an anti-reflection film or the like according to the related art.
- the anti-sticking treatment is performed for the purpose of preventing adhesion to the adjacent layer.
- the viewing angle compensation film is a film for widening the viewing angle so that an image can be viewed relatively clearly even when the screen of the liquid crystal display device is viewed in a direction not perpendicular to the screen but slightly oblique.
- a viewing angle compensating retardation plate includes, for example, a retardation film, an alignment film such as a liquid crystal polymer, and a transparent substrate on which an alignment layer such as a liquid crystal polymer is supported.
- a common retardation plate is a birefringent polymer film uniaxially stretched in the plane direction, whereas a retardation plate used as a viewing angle compensation film is biaxially stretched in the plane direction.
- the attachment of the adhesive layer to one or both surfaces of the polarizing plate or the optical film may be performed by an appropriate method.
- an adhesive solution of about 10 to 40% by weight obtained by dissolving or dispersing a base polymer or a composition thereof in a solvent consisting of an appropriate solvent alone or a mixture such as toluene or ethyl acetate is used.
- Prepare it and apply it directly on a polarizing plate or an optical film by an appropriate development method such as a casting method or a coating method, or form an adhesive layer on a separator according to the above and apply it to a polarizing plate.
- a method of transferring onto an optical film is used.
- the exposed surface of the adhesive layer is covered with a temporary router for the purpose of preventing contamination and the like until practical use. This can prevent the adhesive layer from coming into contact with the adhesive layer in a normal handling state.
- a suitable thin leaf such as plastic film, rubber sheet, paper, cloth, non-woven fabric, net, foam sheet, metal foil, or a laminate thereof may be used as the separator.
- Any suitable material according to the related art such as a material coated with a suitable release agent such as a long mirror alkyl-based or fluorine-based molybdenum sulfide, or the like can be used.
- an organic EL display device including an organic electroluminescent luminous body having a transparent electrode on the front side of an organic luminescent layer that emits light by applying a voltage and a metal electrode on the back side of the organic luminescent layer, A polarizing plate is provided on the surface of the electrode, A retardation plate can be provided between the transparent electrode and the polarizing plate.
- Parts means parts by weight.
- Unevenness was evaluated by placing a sample (polarizer) on the top surface of a backlight used for a liquid crystal display in a dark room, and then using a commercially available polarizing plate (NPF-SEG1224DU manufactured by Nitto Denko Corporation). The analyzer was laminated so that the polarization axes were orthogonal to each other, and the level was visually observed according to the following criteria.
- the amount of change in the degree of polarization (%) is preferably within ⁇ 2%.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/547,139 US20080278673A1 (en) | 2004-04-05 | 2005-03-18 | Polarizer, Polarizing Plate Optical Film and Image Display |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004111212A JP2005292719A (ja) | 2004-04-05 | 2004-04-05 | 偏光子、偏光板、光学フィルムおよび画像表示装置 |
JP2004-111212 | 2004-04-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005098489A1 true WO2005098489A1 (ja) | 2005-10-20 |
Family
ID=35125214
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/004961 WO2005098489A1 (ja) | 2004-04-05 | 2005-03-18 | 偏光子、偏光板、光学フィルムおよび画像表示装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20080278673A1 (ja) |
JP (1) | JP2005292719A (ja) |
KR (1) | KR20070003910A (ja) |
CN (1) | CN1965251A (ja) |
TW (1) | TW200613776A (ja) |
WO (1) | WO2005098489A1 (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008233873A (ja) * | 2007-02-21 | 2008-10-02 | Dainippon Printing Co Ltd | 表示パネル用基材とその作製方法および表示パネル |
CN102902005B (zh) | 2009-05-15 | 2014-11-05 | 日东电工株式会社 | 辊状卷料组件、辊状卷料及其制造方法 |
CN103592716B (zh) * | 2013-10-15 | 2019-02-22 | 深圳市三利谱光电科技股份有限公司 | 一种散射偏光片及其制造方法和应用 |
US20150378075A1 (en) * | 2014-06-27 | 2015-12-31 | Samsung Electronics Co., Ltd. | Optical film, manufacturing method thereof, and display device |
KR102444609B1 (ko) * | 2014-12-31 | 2022-09-27 | 삼성전자주식회사 | 편광 필름, 그 제조 방법 및 표시 장치 |
US20210141137A1 (en) * | 2017-08-03 | 2021-05-13 | Yasuhiro Koike | Optical material, optical component, and apparatus |
US10962696B2 (en) * | 2018-01-31 | 2021-03-30 | Light Polymers Holding | Coatable grey polarizer |
KR102231814B1 (ko) * | 2019-10-01 | 2021-03-24 | 조덕재 | 용융압출식 편광필름 |
CN114555327A (zh) * | 2019-10-01 | 2022-05-27 | 曹德载 | 熔融挤出式偏光膜 |
CN112485942A (zh) * | 2020-12-07 | 2021-03-12 | 绍兴知威光电科技有限公司 | 一种具有弹性偏光膜的显示器 |
CN114660848B (zh) * | 2022-03-18 | 2023-11-07 | 信利光电股份有限公司 | 一种具有偏光功能的液晶显示面板、显示模组及显示装置 |
CN116125582B (zh) * | 2023-04-13 | 2023-08-22 | Tcl华星光电技术有限公司 | 偏光片和液晶显示装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10221688A (ja) * | 1997-02-10 | 1998-08-21 | Sharp Corp | 反射型液晶表示装置 |
JP2002502503A (ja) * | 1996-02-29 | 2002-01-22 | ミネソタ マイニング アンド マニュファクチャリング カンパニー | 輝度増強フィルム |
JP2002521728A (ja) * | 1998-07-31 | 2002-07-16 | スリーエム イノベイティブ プロパティズ カンパニー | 連続相/分散相の光学体の二次成形方法 |
JP2002207118A (ja) * | 2001-01-05 | 2002-07-26 | Nitto Denko Corp | 偏光フィルム及び液晶表示装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1269555A (en) * | 1984-11-16 | 1990-05-29 | Sumitomo Chemical Company, Limited | Light-polarizing film |
US5867316A (en) * | 1996-02-29 | 1999-02-02 | Minnesota Mining And Manufacturing Company | Multilayer film having a continuous and disperse phase |
US7248331B2 (en) * | 2002-09-09 | 2007-07-24 | Nitto Denko Corporation | Polarizer, optical film, and image display |
JP3724801B2 (ja) * | 2002-10-08 | 2005-12-07 | 日東電工株式会社 | 偏光子、光学フィルムおよび画像表示装置 |
-
2004
- 2004-04-05 JP JP2004111212A patent/JP2005292719A/ja active Pending
-
2005
- 2005-03-18 US US11/547,139 patent/US20080278673A1/en not_active Abandoned
- 2005-03-18 KR KR1020067018236A patent/KR20070003910A/ko not_active Application Discontinuation
- 2005-03-18 CN CNA200580009277XA patent/CN1965251A/zh active Pending
- 2005-03-18 WO PCT/JP2005/004961 patent/WO2005098489A1/ja active Application Filing
- 2005-04-04 TW TW094110671A patent/TW200613776A/zh unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002502503A (ja) * | 1996-02-29 | 2002-01-22 | ミネソタ マイニング アンド マニュファクチャリング カンパニー | 輝度増強フィルム |
JPH10221688A (ja) * | 1997-02-10 | 1998-08-21 | Sharp Corp | 反射型液晶表示装置 |
JP2002521728A (ja) * | 1998-07-31 | 2002-07-16 | スリーエム イノベイティブ プロパティズ カンパニー | 連続相/分散相の光学体の二次成形方法 |
JP2002207118A (ja) * | 2001-01-05 | 2002-07-26 | Nitto Denko Corp | 偏光フィルム及び液晶表示装置 |
Also Published As
Publication number | Publication date |
---|---|
US20080278673A1 (en) | 2008-11-13 |
CN1965251A (zh) | 2007-05-16 |
JP2005292719A (ja) | 2005-10-20 |
TW200613776A (en) | 2006-05-01 |
KR20070003910A (ko) | 2007-01-05 |
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