Multicolored photochromic display

Details Multicolored photochromic display Multicolored photochromic display

B - Operations, Transporting

41

M

B41M 5/00 (2006.01) B41M 5/40 (2006.01) B44F 1/08 (2006.01) G03G 5/12 (2006.01) G03G 13/01 (2006.01) G03G 13/04 (2006.01)

Patent

CA 2510518

A multicolored display and process for forming such a display is provided. The multicolored display includes marking particles comprising a mixture of photochromic materials. The photochromic materials each exhibit a first "invisible" photochromic state at a first absorption spectrum and at least a second "visible" photochromic state at a second absorption spectrum. The second "visible" photochromic state of each photochromic material produces a different color relative to the other photochromic materials. In embodiments, the marking particles include a mixture of a spiropyran material and a dithienylethene material.

La présence description porte sur une affiche multicolore et sur le processus à suivre pour créer un tel affichage. L'affichage multicolore comprend des particules de marquage consistant en un mélange de matériaux photochromiques. Les matériaux en question présentent chacun un premier état photochromique « invisible » à un premier spectre d'absorption et au moins un second état photochromique « visible » à un second spectre d'absorption. Le second état photochromique « visible » de chaque matériau photochromique produit une couleur différente par rapport aux autres matériaux photochromiques. Dans certaines configurations, les particules de marquage consistent en un mélange de matériau du type spiropyrane et dithiényléthène.

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