JP7357996B2 - 円偏光板 - Google Patents
円偏光板 Download PDFInfo
- Publication number
- JP7357996B2 JP7357996B2 JP2022515070A JP2022515070A JP7357996B2 JP 7357996 B2 JP7357996 B2 JP 7357996B2 JP 2022515070 A JP2022515070 A JP 2022515070A JP 2022515070 A JP2022515070 A JP 2022515070A JP 7357996 B2 JP7357996 B2 JP 7357996B2
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- Prior art keywords
- polarizing plate
- circularly polarizing
- wavelength
- light
- film
- Prior art date
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- 239000013008 thixotropic agent Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OVTCUIZCVUGJHS-VQHVLOKHSA-N trans-dipyrrin Chemical compound C=1C=CNC=1/C=C1\C=CC=N1 OVTCUIZCVUGJHS-VQHVLOKHSA-N 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3016—Polarising elements involving passive liquid crystal elements
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- 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
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- 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
- G02B5/3041—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 comprising multiple thin layers, e.g. multilayer stacks
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
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- 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
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Polarising Elements (AREA)
- Electroluminescent Light Sources (AREA)
- Surface Treatment Of Optical Elements (AREA)
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Description
Rin=d*(nx-ny)
0<a*<8及び-8<b*<0
反射防止フィルム、偏光子、位相差フィルム及び粘着剤層を順次に含む円偏光板を準備した。
反射防止フィルムに対して、反射色及び反射率を測定して表面反射特性を評価した。表1は、反射防止フィルムの最低反射波長、反射色(L*a*b*色座標)及び反射率の測定結果を示す。
ブルーカットダイを含む粘着剤の透過率と、前記粘着剤の付着前後の偏光子の透過率を測定し、その結果をそれぞれ図5及び図6に示す。ブルーカットダイの濃度が0.3%である粘着剤は、430nm波長に対する透過率が90%であり、ブルーカットダイの濃度が0.6%である粘着剤は、430nm波長に対する透過率が80%であり、ブルーカットダイの濃度が0.9%である粘着剤は、430nm波長に対する透過率が70%である。
Edmund Opticsから購買したガラス基板の一側面にInconel(金属)コーティングされているOD(Optical Density)0.5のreflective ND(Neutral Density)Filterを反射板で用いて円偏光板の反射特性を測定した。図7は、前記反射板の反射率スペクトラムを示す。前記反射率は、Minolta社のCM-2600dを用いて測定し、反射板の蒸着面がlight trapに向かうようにしてガラス面で反射率を測定した。反射率は、SCI(Specular Component Included)mode値を取った。円偏光板を反射板のガラス面に付着して上記のような方法で反射率及び反射色を測定した。反射率及び反射色は、D65光源条件でCIE 1964/10°規格によって測定される。L*a*b*色座標基準反射色が△a*b*<8を満足するか又は0<a*<8及び-8<b*<0を満足する場合、反射視感に優れることで評価することができる。
Claims (15)
- 反射防止フィルム、偏光子、フラット分散特性を有し且つR(450)/R(550)値が0.99~1.01である位相差フィルム及び粘着剤層を順次に含む円偏光板であって、前記反射防止フィルムの550nm波長に対する反射率は、2.0%以下であり、反射色は、L*a*b*色座標基準b*>0を満足し、前記円偏光板の430nm波長に対する透過率は、30%超過であり、R(λ)は、λnm波長に対する面内位相差値であり、
前記反射防止フィルムの最低反射波長は、490nm以下であり、
前記位相差フィルムの遅相軸と前記偏光子の吸収軸が成す角度は、35度~55度範囲内であることを特徴とする、円偏光板。 - 前記反射防止フィルムの最低反射波長は、380nm以上であることを特徴とする、請求項1に記載の円偏光板。
- 前記反射防止フィルムは、最低反射率は1%以下であり、380nm~780nm範囲内の波長で反射率が1%以下である波長帯域が1個存在することを特徴とする、請求項1に記載の円偏光板。
- 前記反射防止フィルムのヘイズは、1%以下であることを特徴とする、請求項1に記載の円偏光板。
- 前記反射防止フィルムは、反射色がL*a*b*色座標基準a*>0及びL*>0を満足することを特徴とする、請求項1に記載の円偏光板。
- 前記偏光子の550nm波長の光に対する透過率は、40%~50%範囲内であることを特徴とする、請求項1に記載の円偏光板。
- 前記位相差フィルムの550nm波長の光に対する面内位相差値は、130nm~144nm範囲内であることを特徴とする、請求項1に記載の円偏光板。
- 前記位相差フィルムの遅相軸と前記偏光子の吸収軸が成す角度は、35度~55度範囲内であることを特徴とする、請求項1に記載の円偏光板。
- 前記円偏光板の460nm及び550nm波長の光に対する透過率は、それぞれ40%以上であることを特徴とする、請求項1に記載の円偏光板。
- 前記円偏光板の430nm波長の光に対する透過率は、50%以下であることを特徴とする、請求項1に記載の円偏光板。
- 前記円偏光板は、370nm~430nm範囲内の波長で最大吸光度を示す染料をさらに含むことを特徴とする、請求項1に記載の円偏光板。
- OLEDパネル及び前記OLEDパネルの一面に配置された請求項1~11のいずれか一項に記載の円偏光板を含むことを特徴とする、OLED装置。
- 前記OLEDパネルは、500nm~600nmの範囲内の波長の光に対する平均反射率が25%以下であることを特徴とする、請求項12に記載のOLED装置。
- 前記円偏光板が付着されたOLEDパネルの550nm波長の光に対する反射率は、2.1%以下であることを特徴とする、請求項12に記載のOLED装置。
- 前記円偏光板が付着されたOLEDパネルの反射色は、L*a*b*色座標基準下記式3又は式4を満足することを特徴とする、請求項12に記載のOLED装置。
[式3]
0<a*<8及び-8<b*<0
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