Lowe Hauptman Ham & Berner, LLP
Polarizing film for an organic electroluminescent (EL) display, a method of making the same and an organic EL display device having the polarizing film
Provided is a continuous web of polarizing film for an organic EL display device which has a thickness of 10 μm or less and exhibits high optical characteristics. The polarizing film for an organic EL display device is made of a polyvinyl alcohol type resin having a molecularly oriented dichroic material, and formed through stretching to have a thickness of 10 μm or less and exhibit optical characteristics satisfying the following conditions: T≧42.5; and P≧99.5, wherein T is a single layer transmittance, and P is a polarization rate. The polarizing film for an organic EL display device may be prepared by subjecting a laminate comprising a non-crystallizable ester type thermoplastic resin substrate and the polyvinyl alcohol type resin layer formed on the substrate, to 2-stage stretching consisting of preliminary in-air stretching and in-boric-acid-solution stretching.
Nitto Denko Corporation
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B29C G02F H01L C09K G02B B29D G02B B29C G02B Y10T G02B G02F G02F B29K Y10T G02F G02F B29K B29K
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Takeharu Shusaku Tomohiro Takashi Yuji Minoru
Kitagawa Goto Mori Kamijo Miyaki Miyatake