| 摘要 |
The invention relates to a document having an electronic memory (104) for storing image data (106), having an emissive display device (110) for reproducing the image data, having power supply means (112, 114, 116; 128) for supplying the display device with electrical energy, and having an optical layer (118) which is arranged on the display device, wherein the optical layer has at least one image, and wherein the optical layer is embodied in such a way that the image can then be perceived visually if the display device is not supplied with the electrical energy. |
