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G - Physics – 02 – B

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G02B 5/18 (2006.01) B42D 15/10 (2006.01) G09F 3/02 (2006.01)

Patent

CA 2692949

[PROBLEMS] A higher forgery prevention effect is realized. [MEANS FOR SOLVING PROBLEMS] A display (10) according to the present invention is characterized by comprising a relief-structured region as an image-constituting element including recessed portions, protruding portions or both of them arranged two-dimensionally on one of main surfaces of a light-transmitting layer, and a reflection layer supported by the one of the main surfaces and covering at least a part of the relief-structured region, wherein a center-to-center distance of the recessed portions, protruding portions or both of them falls within a range of 200 nm to 500 nm. Further, it is characterized in that it comprises multiple relief-structured regions, and a shape, depth or height, the center-to-center distance and an arrangement pattern of the recessed portions, protruding portions or both of them in at least one of the relief-structured regions are different from those in other relief-structured region(s).

L'invention vise à empêcher de façon plus satisfaisante la contrefaçon. L'invention concerne un corps d'indication (10) qui est doté, sur une surface principale d'une couche de transmission de lumière, d'une région ayant une structure présentant des saillies/des creux comprenant une pluralité de creux et/ou de saillies disposés de manière bidimensionnelle sous forme d'une composante d'image, et doté d'une couche réfléchissante recouvrant au moins une partie de la région ayant une structure présentant des saillies/des creux, tout en étant portée sur une surface principale, la distance entre les centres des creux et des saillies se trouvant dans la plage allant de 200 à 500 nm. Une pluralité de structures présentant des saillies/des creux est formée et dans au moins une région ayant une structure présentant des saillies/des creux, la forme, la profondeur ou hauteur, la distance entre les centres et le modèle de disposition de la pluralité de creux et/ou de saillies sont différents de ceux d'une autre région ayant une structure présentant des saillies/des creux.

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