Abstract: The energy supply device having a plurality of energy panels in the form of roof tiles, with which a part of a building is covered and which have an energy module serving to absorb solar energy, which energy module is connected to a power supply line. According to the invention at least one metal pipeline is provided on an outer side of the building, which pipeline carries the energy panels that are mechanically and thermally connected to the pipeline, in which a cable channel, serving to receive the power supply line, and at least one fluid channel are provided, through which a fluid heat transport medium can be conveyed, with which thermal energy can be transferred from the energy panel to a thermal energy sink.

Abstract: The expansion device (2) provided for the attachment of a flat panel display (1) has at least one module (31, . . . , 3n), including a computer module (31), which serves to store, transmit or process video/graphics information which is transmittable to the large-format display unit (12) of the flat panel display (1), said display unit being held by a supporting structure (10). According to the invention, the expansion device (2) has a support device (21) with at least one retaining element (2110, 2120) which is located on the top of the support device (21) and is able to engage a correspondingly designed receiving part (101) located on the bottom of the supporting structure (10) of the flat panel display (1), and which retaining element is able to hold the supporting structure (10) in a fixed position relative to the support device (21).