Phase difference plate for organic EL display device, organic EL display device, and method for producing phase difference plate

    公开(公告)号:US11374205B2

    公开(公告)日:2022-06-28

    申请号:US16693737

    申请日:2019-11-25

    Abstract: An object of the present invention is to provide a phase difference plate for an organic EL display device having excellent light resistance, an organic EL display device, and a method for producing a phase difference plate. The phase difference plate for an organic EL display device of an embodiment of the present invention is a phase difference plate for an organic EL display device having a phase difference layer formed from a composition containing a copolymer having both of a repeating unit A including a photo-alignment group and a repeating unit B including a moiety capable of expressing birefringence having reciprocal wavelength dispersion, in which the photo-alignment group includes a double bond structure of C═C or C═N.

    Composite film and organic electroluminescence device

    公开(公告)号:US10705275B2

    公开(公告)日:2020-07-07

    申请号:US16429897

    申请日:2019-06-03

    Abstract: A composite film includes at least one phase difference layer, a substrate, and an inorganic layer, in which the phase difference layer is a layer formed by curing a composition including a liquid crystal compound, the inorganic layer includes silicon nitride, a distance between the substrate and a surface of the composite film is 60 μm or less, with respect to each of the layers other than the substrate, a product E×t×1 of a modulus of elasticity E in unit of GPa, a thickness t in unit of μm, and a distance 1 from a surface of the substrate to a center of each of the layer in unit of μm satisfies Expression 1, and a total SUM(E×t×1) of E×t×1 of each of the layers other than the substrate satisfies Expression 2, 0.8≤E×t×1 (Expression 1), SUM(E×t×1)≤1500 (Expression 2); and the composite film.

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