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921 条记录 (耗时 0.019 秒)

    OPTICAL STRUCTURE AND ARTIFACT REDUCTION METHOD
    17.
    发明公开
    OPTICAL STRUCTURE AND ARTIFACT REDUCTION METHOD 审中-公开

    公开(公告)号：EP4321906A3

    公开(公告)日：2024-03-06

    申请号：EP23218607.2

    申请日：2020-02-04

    申请人： Toppan Printing Co., Ltd.

    发明人： MITSUI, Kazunari ,  SHINODA, Koichi

    IPC分类号： B42D25/324 ,  B42D25/328 ,  G02B5/18

    摘要： An optical structure in which a plurality of cells having a pleat structure are regularly aligned in contact with each other on an embossed surface, the pleat structure has a plurality of inclined surfaces parallel to each other, the pleat structure has a linear ridge line formed of an inclined surface end, each ridge line is parallel to a straight line approximating a smooth curved line, depths of pleat structures of adjacent cells are uniform, an interval of ridge lines in a cell continuously varies between adjacent cells, an inclined surface group of each aligned cell displays a smooth curved surface appearance by reflected light of the inclined surfaces, and a distance of a ridge line, among ridge lines in each cell, closest to a predetermined reference point in the cell from the predetermined reference point has artificial fluctuation.

    METHOD OF APPLYING A PATTERN AND SECURITY DEVICE FOR AN ARTICLE
    19.
    发明公开
    METHOD OF APPLYING A PATTERN AND SECURITY DEVICE FOR AN ARTICLE 审中-公开

    公开(公告)号：EP4299333A3

    公开(公告)日：2024-02-07

    申请号：EP23203552.7

    申请日：2021-05-26

    申请人： E Ink Corporation

    发明人： TRIGGS-RAMM, Graham ,  HOSSEINI, Peiman

    IPC分类号： B42D25/36 ,  B42D25/324 ,  B42D25/425 ,  B42D25/455 ,  B42D25/46 ,  B42D25/346

    摘要： Methods of applying a pattern and security devices are disclosed. In one arrangement, a receiving member having a layered structure is provided. The layered structure comprises a layer of phase change material. The phase change material is thermally switchable between a plurality of stable states having different refractive indices relative to each other. An embossing member is stamped into the receiving member. The embossing member heats a selected portion of the layer of phase change material via contact with the receiving member during the stamping. The heating thermally switches phase change material in the selected portion and thereby applies a pattern of different refractive indices to the layer of phase change material.