| 摘要 |
An illumination device may include a multilayer system having at least two functional layers, a supporting functional layer having a sheet-like substrate on which a photovoltaic functional layer with at least one solar cell is applied; at least one energy storage device for storing energy generated by the at least one solar cell; at least one light source that can be operated by means of the energy stored in the energy storage device; and at least one brightness sensor. The illumination device may be configured to activate or deactivate the at least one light source on the basis of a measured value sensed by the at least one brightness sensor. |
