| 摘要 |
A color shifting composition and method useful as a coating on a surface. The composition (10) comprises a layer (14) of piezoelectric material disposed on the surface (12) and a layer (16) of electrically conductive disposed on the layer (14) of piezoelectric material. A source (20) is included for changing an electromagnetic property of the layer (14) of piezoelectric material. The surface (12) has a first reflective or refractive property at one setting of the source (20) and another reflective or refractive property at another setting thereof. In the illustrative embodiment, the layer (14) of piezoelectric material and the layer (16) of electrically conductive material are sufficiently thin to be transparent to electromagnetic energy in the frequencies of interest. <IMAGE>
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