Method for alternately expressing color-memorizing photochromic function in toy element, and an alternately color-memorizing photochromic toy
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United States of America Patent
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May 21, 2013
Grant Date -
Jul 15, 2004
app pub date -
Oct 28, 2003
filing date -
Oct 30, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A toy comprises a toy element comprising a photochromic layer which contains a photochromic compound having a photo memory function (color-memorizing photochromic property), maintains a coloring state by developing a color through the irradiation of ultraviolet rays or sunlight containing ultraviolet rays and changes into decolorizing state through its decolorization by the irradiation of visible light, and a color-changing means which contains at least one of an ultraviolet ray absorbent and a light-shading pigment capable of shading at least ultraviolet rays, changes the photochromic compound of the coloring state into decolorizing state by cutting off ultraviolet rays of sunlight and thereby effecting irradiation of visible light, and maintains the changed state, wherein a function to memorize and maintain coloring and decolorizing states alternately is expressed by arranging the color-changing means under such a condition that it is contacted or non-contacted with the photochromic layer.
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Family
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Cited Art Landscape
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