| 摘要 |
An apparatus includes a layer including a material which has an electrically controllable transparency. At least a part of the layer is arranged to cover at least a part of a surface of a display. The apparatus further includes electrical contacts arranged to enable an electrical control of the transparency of the layer. When employing such an apparatus, it may be determined which appearance the layer is to assume. The transparency of the layer can then be controlled in accordance with the determined appearance.
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