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US 5,521,371 AGranted
Rewritable bar code display medium, and image display method and image display apparatus using the same
AssigneeRicoh Company, Ltd.
InventorsYoshihiko Hotta, Keishi Kubo, Shoji Maruyama, Takashi Yano, Hajime Takayama
Life of this patent
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Abstract
A rewritable bar code display medium is disclosed, which is composed of a support and a reversible thermosensitive recording layer for reversibly forming bar codes therein formed on the support, which reversible thermosensitive recording layer varies in transparency with change in temperature, and an image display method using the rewritable bar code display medium, and an apparatus for implementing the image display method are also disclosed.
Claims8
An image display apparatus comprising:
- (a) a bar code reading means for optically reading a bar code formed on a rewritable bar code display medium comprising a support and a reversible thermosensitive recording layer formed thereon which varies in transparency with change in temperature and which comprises a resin matrix and a low-molecular weight organic compound dispersed in said resin matrix;
- (b) a bar code erasing means for erasing an optically read bar code formed on said bar code display medium, and (c) a bar code formation means for forming a bar code by application of heat to said rewritable bar code display medium.
Dependencies are inferred from the claim text.