| 摘要 |
Examples consistent with the invention include a reusable device for writing, displaying and deleting information with an electronic device on a support device having bistable liquid crystals. The reusable device includes a substrate onto which are successively applied and from the substrate: an electricity conducting coating; an optical coating that can absorb all or part of the surrounding light; a coating of a transparent substance in which a plurality of bistable liquid crystals are emulsioned; at least one electricity conducting element being electrically connected to the electricity conducting coating via an electrical voltage generator to form an electric circuit. The electricity conducting element may be in contact and be moved over the surface of the transparent coating in which a plurality of bistable liquid crystals are emulsioned, to produce a modification of the state of light transmission in said transparent coating at the contact, so as to generate the writing and displaying of information, or the deleting of the displayed information.
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